/* roulang page: index */
:root {
            --bg-primary: #0B0F14;
            --bg-secondary: #10151C;
            --bg-card: #1C222A;
            --bg-deep: #0E1319;
            --bg-input: #0F141A;
            --color-primary: #FF5A1F;
            --color-primary-hover: #FF6B35;
            --color-accent: #00E5CC;
            --color-acid: #C8FF00;
            --color-muted: #6B7683;
            --color-text: #EAF0F5;
            --color-text-soft: #A0AAB4;
            --color-border: #2A3138;
            --color-lead: #3D4650;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --shadow-base: 0 8px 24px rgba(0, 0, 0, 0.35);
            --shadow-hover: 0 14px 36px rgba(0, 0, 0, 0.45);
            --font-sans: "Microsoft YaHei", "PingFang SC", "HarmonyOS Sans SC", "Noto Sans CJK SC", sans-serif;
            --font-mono: "Roboto Mono", "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
            --container-max: 1280px;
            --section-gap-desktop: 96px;
            --section-gap-tablet: 72px;
            --section-gap-mobile: 52px;
            --transition-base: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-sans);
            font-size: 15px;
            line-height: 1.75;
            color: var(--color-text);
            background: var(--bg-primary);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: var(--color-accent);
            text-decoration: none;
            transition: color var(--transition-base), background var(--transition-base), border-color var(--transition-base);
        }

        a:hover {
            color: var(--color-primary);
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible,
        select:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 2px;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-family: var(--font-sans);
            color: var(--color-text);
            line-height: 1.3;
            font-weight: 700;
        }

        h1 {
            font-size: clamp(32px, 5vw, 56px);
            font-weight: 800;
            letter-spacing: 0.01em;
        }

        h2 {
            font-size: clamp(28px, 3.5vw, 36px);
            font-weight: 700;
            margin-bottom: 16px;
        }

        h3 {
            font-size: clamp(20px, 2.5vw, 26px);
            font-weight: 600;
            margin-bottom: 12px;
        }

        p {
            margin-bottom: 1.25rem;
            color: var(--color-text-soft);
        }

        .mono {
            font-family: var(--font-mono);
            font-variant-numeric: tabular-nums;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        section {
            padding-top: var(--section-gap-desktop);
            padding-bottom: var(--section-gap-desktop);
        }

        @media (max-width: 1024px) {
            section {
                padding-top: var(--section-gap-tablet);
                padding-bottom: var(--section-gap-tablet);
            }
        }

        @media (max-width: 640px) {
            section {
                padding-top: var(--section-gap-mobile);
                padding-bottom: var(--section-gap-mobile);
            }
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

        /* Header & Navigation */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(11, 15, 20, 0.95);
            backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--color-border);
            transition: box-shadow var(--transition-base);
        }

        .site-header.scrolled {
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
        }

        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 16px;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 22px;
            font-weight: 800;
            color: var(--color-text);
            letter-spacing: 0.02em;
            white-space: nowrap;
        }

        .nav-logo .logo-dot {
            width: 10px;
            height: 10px;
            background: var(--color-primary);
            border-radius: 50%;
            display: inline-block;
            animation: pulse-dot 2s infinite;
        }

        @keyframes pulse-dot {
            0%,
            100% {
                box-shadow: 0 0 0 0 rgba(255, 90, 31, 0.6);
            }
            50% {
                box-shadow: 0 0 0 6px rgba(255, 90, 31, 0.1);
            }
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 20px;
            list-style: none;
        }

        .nav-menu a {
            color: var(--color-text-soft);
            font-size: 14px;
            font-weight: 500;
            padding: 6px 10px;
            position: relative;
            transition: color var(--transition-base);
            white-space: nowrap;
        }

        .nav-menu a:hover {
            color: var(--color-primary);
        }

        .nav-menu a.active {
            color: var(--color-primary);
            border-left: 2px solid var(--color-primary);
            padding-left: 8px;
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--color-primary);
            color: #101418 !important;
            padding: 10px 18px;
            border-radius: 10px;
            font-weight: 700;
            font-size: 14px;
            transition: background var(--transition-base), transform var(--transition-base);
            white-space: nowrap;
        }

        .nav-cta:hover {
            background: var(--color-primary-hover);
            transform: translateY(-1px);
        }

        .nav-cta:active {
            transform: translateY(0);
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: transparent;
            border: none;
            padding: 8px;
            cursor: pointer;
        }

        .nav-toggle span {
            width: 22px;
            height: 2px;
            background: var(--color-text);
            transition: all var(--transition-base);
        }

        @media (max-width: 860px) {
            .nav-menu {
                display: none;
                position: absolute;
                top: 68px;
                left: 0;
                right: 0;
                background: rgba(11, 15, 20, 0.98);
                flex-direction: column;
                padding: 16px 24px 24px;
                gap: 8px;
                border-bottom: 1px solid var(--color-border);
                align-items: flex-start;
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-toggle {
                display: flex;
            }
        }

        /* Progress Steps */
        .progress-steps {
            background: var(--bg-deep);
            border-bottom: 1px solid var(--color-border);
            padding: 10px 0;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
        }

        .progress-steps-inner {
            display: flex;
            align-items: center;
            gap: 0;
            min-width: 480px;
        }

        .step-item {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            cursor: pointer;
            color: var(--color-muted);
            font-size: 13px;
            font-weight: 500;
            transition: color var(--transition-base);
            padding-right: 20px;
        }

        .step-item:not(:last-child)::after {
            content: '';
            width: 28px;
            height: 2px;
            background: var(--color-border);
            margin-left: 20px;
            flex-shrink: 0;
        }

        .step-item .step-dot {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            border: 2px solid var(--color-border);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 12px;
            font-weight: 700;
            font-family: var(--font-mono);
            transition: all var(--transition-base);
            flex-shrink: 0;
        }

        .step-item.active {
            color: var(--color-primary);
        }

        .step-item.active .step-dot {
            border-color: var(--color-primary);
            background: rgba(255, 90, 31, 0.1);
            color: var(--color-primary);
        }

        .step-item.completed {
            color: var(--color-accent);
        }

        .step-item.completed .step-dot {
            border-color: var(--color-accent);
            background: rgba(0, 229, 204, 0.1);
            color: var(--color-accent);
        }

        @media (max-width: 640px) {
            .progress-steps {
                padding: 8px 0;
            }
            .step-item {
                font-size: 12px;
                gap: 6px;
            }
            .step-item:not(:last-child)::after {
                width: 16px;
                margin-left: 12px;
            }
            .step-item .step-dot {
                width: 24px;
                height: 24px;
                font-size: 10px;
            }
        }

        /* Hero */
        .hero {
            padding-top: 160px;
            padding-bottom: 80px;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
        }

        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(11, 15, 20, 0.55);
            z-index: 0;
        }

        .hero .container {
            position: relative;
            z-index: 1;
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 48px;
            align-items: center;
        }

        .hero-left {
            padding-right: 16px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(255, 90, 31, 0.12);
            border: 1px solid rgba(255, 90, 31, 0.4);
            color: var(--color-primary);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 14px;
            border-radius: 20px;
            margin-bottom: 20px;
            font-family: var(--font-mono);
        }

        .hero-badge .dot {
            width: 6px;
            height: 6px;
            background: var(--color-accent);
            border-radius: 50%;
            animation: pulse-dot 1.5s infinite;
        }

        .hero h1 {
            margin-bottom: 20px;
            font-size: clamp(32px, 4.5vw, 52px);
        }

        .hero-desc {
            font-size: 16px;
            line-height: 1.8;
            color: var(--color-text-soft);
            margin-bottom: 28px;
            max-width: 520px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-bottom: 24px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: 10px;
            font-weight: 700;
            font-size: 15px;
            cursor: pointer;
            transition: all var(--transition-base);
            border: none;
            font-family: var(--font-sans);
            text-decoration: none;
        }

        .btn-primary {
            background: var(--color-primary);
            color: #101418;
        }

        .btn-primary:hover {
            background: var(--color-primary-hover);
            transform: translateY(-1px);
            box-shadow: 0 8px 20px rgba(255, 90, 31, 0.3);
            color: #101418;
        }

        .btn-primary:active {
            transform: translateY(0);
        }

        .btn-secondary {
            background: transparent;
            color: var(--color-text);
            border: 1px solid var(--color-border);
        }

        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.06);
            border-color: var(--color-text-soft);
            color: var(--color-text);
        }

        .hero-mini-text {
            font-size: 13px;
            color: var(--color-muted);
            line-height: 1.7;
            max-width: 480px;
        }

        /* Hero faux data panel */
        .hero-panel {
            background: rgba(28, 34, 42, 0.85);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 28px;
            backdrop-filter: blur(8px);
        }

        .hero-panel-title {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 16px;
            font-size: 14px;
            font-weight: 600;
            color: var(--color-text);
        }

        .hero-panel-title .live {
            display: flex;
            align-items: center;
            gap: 4px;
            color: var(--color-accent);
            font-size: 12px;
            font-weight: 700;
            font-family: var(--font-mono);
            text-transform: uppercase;
        }

        .hero-panel-title .live .pulse {
            width: 7px;
            height: 7px;
            background: var(--color-accent);
            border-radius: 50%;
            animation: pulse-dot 1s infinite;
        }

        .match-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 10px 0;
            border-bottom: 1px solid var(--color-border);
            font-size: 13px;
        }

        .match-row:last-child {
            border-bottom: none;
        }

        .match-teams {
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 600;
            color: var(--color-text);
        }

        .match-score {
            font-family: var(--font-mono);
            font-weight: 700;
            font-size: 15px;
            color: var(--color-accent);
        }

        .match-tag {
            font-size: 11px;
            padding: 2px 8px;
            border-radius: 4px;
            font-weight: 600;
            font-family: var(--font-mono);
        }

        .tag-live {
            background: rgba(0, 229, 204, 0.15);
            color: var(--color-accent);
            border: 1px solid rgba(0, 229, 204, 0.3);
        }

        .tag-upcoming {
            background: rgba(255, 255, 255, 0.08);
            color: var(--color-muted);
            border: 1px solid var(--color-border);
        }

        @media (max-width: 1024px) {
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .hero {
                padding-top: 130px;
                padding-bottom: 60px;
                min-height: auto;
            }
        }

        @media (max-width: 640px) {
            .hero {
                padding-top: 120px;
                padding-bottom: 48px;
            }
            .hero-panel {
                padding: 18px;
            }
            .btn {
                padding: 10px 18px;
                font-size: 14px;
                width: 100%;
                justify-content: center;
            }
            .hero-actions {
                flex-direction: column;
            }
        }

        /* Category quick nav */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }

        .category-card {
            background: var(--bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 24px;
            transition: all var(--transition-base);
            display: block;
            text-decoration: none;
            color: var(--color-text);
        }

        .category-card:hover {
            border-color: var(--color-accent);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
            color: var(--color-text);
        }

        .category-card .icon {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: rgba(255, 90, 31, 0.1);
            border: 1px solid rgba(255, 90, 31, 0.3);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: var(--color-primary);
            margin-bottom: 14px;
        }

        .category-card h3 {
            font-size: 16px;
            margin-bottom: 6px;
        }

        .category-card p {
            font-size: 13px;
            color: var(--color-muted);
            margin-bottom: 0;
            line-height: 1.6;
        }

        @media (max-width: 1024px) {
            .category-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 640px) {
            .category-grid {
                grid-template-columns: 1fr;
            }
        }

        /* Metrics Dashboard */
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(6, 1fr);
            gap: 12px;
        }

        .metric-card {
            background: var(--bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-sm);
            padding: 18px 16px;
            transition: all var(--transition-base);
        }

        .metric-card:hover {
            border-color: var(--color-primary);
            box-shadow: var(--shadow-base);
        }

        .metric-label {
            font-size: 12px;
            color: var(--color-muted);
            font-weight: 500;
            margin-bottom: 6px;
            letter-spacing: 0.02em;
        }

        .metric-value {
            font-family: var(--font-mono);
            font-size: 28px;
            font-weight: 700;
            color: var(--color-text);
            line-height: 1;
            margin-bottom: 6px;
        }

        .metric-trend {
            font-size: 12px;
            font-family: var(--font-mono);
            font-weight: 600;
        }

        .trend-up {
            color: var(--color-accent);
        }

        .trend-down {
            color: #FF4D4D;
        }

        .trend-flat {
            color: var(--color-muted);
        }

        .metric-bar {
            width: 100%;
            height: 4px;
            background: var(--bg-deep);
            border-radius: 2px;
            margin-top: 8px;
            overflow: hidden;
        }

        .metric-bar-fill {
            height: 100%;
            background: var(--color-primary);
            border-radius: 2px;
            transition: width 0.6s ease;
        }

        @media (max-width: 1024px) {
            .metrics-grid {
                grid-template-columns: repeat(3, 1fr);
            }
        }

        @media (max-width: 640px) {
            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 8px;
            }
            .metric-card {
                padding: 12px;
            }
            .metric-value {
                font-size: 22px;
            }
        }

        /* Service Matrix */
        .matrix-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 0;
            background: var(--bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            overflow: hidden;
        }

        .matrix-cell {
            padding: 32px;
            border: 1px solid var(--color-border);
            transition: all var(--transition-base);
            position: relative;
        }

        .matrix-cell:nth-child(odd) {
            border-right: 1px solid var(--color-border);
        }

        .matrix-cell:hover {
            background: rgba(255, 90, 31, 0.03);
            border-color: rgba(255, 90, 31, 0.3);
        }

        .matrix-cell h3 {
            font-size: 18px;
            margin-bottom: 8px;
            color: var(--color-text);
        }

        .matrix-cell p {
            font-size: 14px;
            color: var(--color-text-soft);
            margin-bottom: 12px;
            line-height: 1.75;
        }

        .matrix-tag {
            display: inline-block;
            font-size: 11px;
            font-family: var(--font-mono);
            font-weight: 600;
            padding: 3px 10px;
            border-radius: 4px;
            background: rgba(0, 229, 204, 0.1);
            border: 1px solid rgba(0, 229, 204, 0.3);
            color: var(--color-accent);
        }

        @media (max-width: 1024px) {
            .matrix-grid {
                grid-template-columns: 1fr;
            }
            .matrix-cell:nth-child(odd) {
                border-right: 1px solid var(--color-border);
            }
        }

        @media (max-width: 640px) {
            .matrix-cell {
                padding: 20px;
            }
        }

        /* Compare section */
        .compare-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
        }

        .compare-card {
            background: var(--bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            transition: all var(--transition-base);
            position: relative;
        }

        .compare-card:hover {
            border-color: var(--color-accent);
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }

        .compare-card.highlight {
            border-color: var(--color-primary);
            background: rgba(255, 90, 31, 0.03);
        }

        .compare-card .compare-name {
            font-size: 16px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 10px;
        }

        .compare-value {
            font-family: var(--font-mono);
            font-size: 32px;
            font-weight: 700;
            color: var(--color-primary);
            margin-bottom: 12px;
        }

        .compare-desc {
            font-size: 14px;
            color: var(--color-text-soft);
            margin-bottom: 14px;
            line-height: 1.75;
        }

        .compare-use {
            font-size: 13px;
            color: var(--color-muted);
            padding-top: 12px;
            border-top: 1px solid var(--color-border);
            line-height: 1.6;
        }

        .compare-bar {
            width: 100%;
            height: 6px;
            background: var(--bg-deep);
            border-radius: 3px;
            margin: 10px 0 14px;
            overflow: hidden;
        }

        .compare-bar-fill {
            height: 100%;
            border-radius: 3px;
            background: var(--color-accent);
            transition: width 0.8s ease;
        }

        @media (max-width: 1024px) {
            .compare-grid {
                grid-template-columns: 1fr;
                gap: 12px;
            }
        }

        /* News section */
        .news-list {
            display: flex;
            flex-direction: column;
            gap: 0;
        }

        .news-item {
            display: flex;
            align-items: flex-start;
            gap: 20px;
            padding: 18px 0;
            border-bottom: 1px solid var(--color-border);
            transition: all var(--transition-base);
        }

        .news-item:hover {
            padding-left: 8px;
        }

        .news-date {
            font-family: var(--font-mono);
            font-size: 13px;
            color: var(--color-accent);
            font-weight: 600;
            min-width: 90px;
            padding-top: 2px;
            flex-shrink: 0;
        }

        .news-content {
            flex: 1;
        }

        .news-content h3 {
            font-size: 16px;
            margin-bottom: 6px;
        }

        .news-content h3 a {
            color: var(--color-text);
            transition: color var(--transition-base);
        }

        .news-content h3 a:hover {
            color: var(--color-primary);
        }

        .news-content p {
            font-size: 14px;
            color: var(--color-muted);
            margin-bottom: 6px;
            line-height: 1.7;
        }

        .news-read-more {
            font-size: 13px;
            font-weight: 600;
            color: var(--color-accent);
            transition: all var(--transition-base);
        }

        .news-read-more:hover {
            color: var(--color-primary);
            text-decoration: underline;
        }

        .news-sidebar {
            background: var(--bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 24px;
        }

        .news-sidebar h3 {
            font-size: 15px;
            margin-bottom: 14px;
            color: var(--color-text);
        }

        .sidebar-tag {
            display: inline-block;
            font-size: 12px;
            padding: 4px 12px;
            border-radius: 4px;
            margin: 0 6px 6px 0;
            background: rgba(255, 90, 31, 0.08);
            border: 1px solid rgba(255, 90, 31, 0.25);
            color: var(--color-primary);
            font-family: var(--font-mono);
        }

        @media (max-width: 640px) {
            .news-item {
                flex-direction: column;
                gap: 6px;
            }
            .news-date {
                min-width: auto;
            }
        }

        /* Brand intro dark band */
        .brand-band {
            background: var(--bg-deep);
            border-top: 1px solid var(--color-border);
            border-bottom: 1px solid var(--color-border);
            padding: 48px 0;
        }

        .brand-intro {
            background: rgba(28, 34, 42, 0.6);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 36px 40px;
            display: grid;
            grid-template-columns: auto 1fr;
            gap: 32px;
            align-items: start;
        }

        .brand-intro .brand-mark {
            font-size: 40px;
            color: var(--color-primary);
            font-weight: 800;
            letter-spacing: 0.03em;
            white-space: nowrap;
        }

        .brand-intro p {
            font-size: 15px;
            line-height: 1.85;
            color: var(--color-text-soft);
            margin-bottom: 0;
        }

        @media (max-width: 640px) {
            .brand-intro {
                grid-template-columns: 1fr;
                gap: 16px;
                padding: 24px;
            }
        }

        /* Deep report */
        .deep-report-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }

        .deep-report-card {
            background: var(--bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 28px;
            transition: all var(--transition-base);
        }

        .deep-report-card:hover {
            border-color: var(--color-primary);
            box-shadow: var(--shadow-base);
        }

        .deep-report-card img {
            border-radius: var(--radius-sm);
            margin-bottom: 16px;
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            background: var(--bg-deep);
        }

        .deep-report-card h3 {
            font-size: 18px;
            margin-bottom: 10px;
            color: var(--color-text);
        }

        .deep-report-card p {
            font-size: 14px;
            color: var(--color-text-soft);
            line-height: 1.8;
            margin-bottom: 0;
        }

        @media (max-width: 1024px) {
            .deep-report-grid {
                grid-template-columns: 1fr;
            }
        }

        /* FAQ */
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-sm);
            margin-bottom: 12px;
            overflow: hidden;
            transition: border-color var(--transition-base);
        }

        .faq-item:hover {
            border-color: rgba(255, 90, 31, 0.3);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 22px;
            background: transparent;
            border: none;
            color: var(--color-text);
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            text-align: left;
            font-family: var(--font-sans);
            transition: all var(--transition-base);
            gap: 12px;
            position: relative;
        }

        .faq-question::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0;
            bottom: 0;
            width: 3px;
            background: var(--color-primary);
            opacity: 0;
            transition: opacity var(--transition-base);
        }

        .faq-item.active .faq-question::before {
            opacity: 1;
            background: var(--color-accent);
        }

        .faq-question:hover {
            background: rgba(255, 255, 255, 0.03);
        }

        .faq-icon {
            font-size: 18px;
            color: var(--color-muted);
            transition: transform var(--transition-base);
            flex-shrink: 0;
        }

        .faq-item.active .faq-icon {
            transform: rotate(45deg);
            color: var(--color-accent);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease;
            padding: 0 22px;
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
            padding-bottom: 18px;
        }

        .faq-answer p {
            font-size: 14px;
            color: var(--color-text-soft);
            line-height: 1.8;
            margin-bottom: 0;
            padding-top: 4px;
        }

        /* Tier progress */
        .tier-section {
            background: var(--bg-deep);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 36px;
        }

        .tier-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
            margin-top: 24px;
        }

        .tier-card {
            background: var(--bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-sm);
            padding: 22px;
            transition: all var(--transition-base);
        }

        .tier-card:hover {
            border-color: var(--color-primary);
            transform: translateY(-2px);
        }

        .tier-level {
            font-family: var(--font-mono);
            font-size: 12px;
            font-weight: 700;
            color: var(--color-primary);
            text-transform: uppercase;
            letter-spacing: 0.04em;
            margin-bottom: 8px;
        }

        .tier-name {
            font-size: 16px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 6px;
        }

        .tier-desc {
            font-size: 13px;
            color: var(--color-muted);
            line-height: 1.7;
            margin-bottom: 10px;
        }

        .tier-cta {
            font-size: 13px;
            font-weight: 600;
            color: var(--color-accent);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        @media (max-width: 1024px) {
            .tier-grid {
                grid-template-columns: 1fr;
            }
        }

        /* CTA Form */
        .cta-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
            align-items: center;
        }

        .cta-left h2 {
            font-size: clamp(26px, 3vw, 34px);
            margin-bottom: 12px;
        }

        .cta-left p {
            color: var(--color-text-soft);
            line-height: 1.8;
            max-width: 460px;
            margin-bottom: 20px;
        }

        .cta-badges {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .cta-badge {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            font-size: 13px;
            padding: 6px 12px;
            border-radius: 6px;
            background: rgba(0, 229, 204, 0.08);
            border: 1px solid rgba(0, 229, 204, 0.25);
            color: var(--color-accent);
            font-weight: 500;
        }

        .form-card {
            background: var(--bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 28px;
        }

        .form-group {
            margin-bottom: 16px;
        }

        .form-group label {
            display: block;
            font-size: 13px;
            font-weight: 600;
            color: var(--color-text);
            margin-bottom: 6px;
        }

        .form-group input,
        .form-group select,
        .form-group textarea {
            width: 100%;
            background: var(--bg-input);
            border: 1px solid var(--color-border);
            color: var(--color-text);
            padding: 12px 14px;
            border-radius: var(--radius-sm);
            font-size: 14px;
            font-family: var(--font-sans);
            transition: all var(--transition-base);
        }

        .form-group input::placeholder,
        .form-group textarea::placeholder {
            color: var(--color-muted);
        }

        .form-group input:focus,
        .form-group select:focus,
        .form-group textarea:focus {
            outline: none;
            border-color: var(--color-primary);
            box-shadow: 0 0 0 3px rgba(255, 90, 31, 0.2);
        }

        .form-group select {
            appearance: none;
            cursor: pointer;
        }

        .form-submit {
            width: 100%;
            padding: 14px;
            background: var(--color-primary);
            color: #101418;
            border: none;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 700;
            cursor: pointer;
            transition: all var(--transition-base);
            font-family: var(--font-sans);
        }

        .form-submit:hover {
            background: var(--color-primary-hover);
            box-shadow: 0 8px 20px rgba(255, 90, 31, 0.3);
        }

        .form-note {
            font-size: 12px;
            color: var(--color-muted);
            text-align: center;
            margin-top: 10px;
            margin-bottom: 0;
        }

        @media (max-width: 1024px) {
            .cta-grid {
                grid-template-columns: 1fr;
            }
        }

        /* Footer */
        .site-footer {
            background: #0B0E11;
            border-top: 1px solid var(--color-border);
            padding: 48px 0 32px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 32px;
        }

        .footer-brand {
            font-size: 20px;
            font-weight: 800;
            color: var(--color-text);
            margin-bottom: 10px;
        }

        .footer-desc {
            font-size: 13px;
            color: var(--color-muted);
            line-height: 1.7;
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 14px;
        }

        .footer-col ul {
            list-style: none;
        }

        .footer-col ul li {
            margin-bottom: 8px;
        }

        .footer-col ul li a {
            color: var(--color-muted);
            font-size: 13px;
            transition: color var(--transition-base);
        }

        .footer-col ul li a:hover {
            color: var(--color-primary);
        }

        .footer-bottom {
            margin-top: 32px;
            padding-top: 20px;
            border-top: 1px solid var(--color-border);
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            font-size: 12px;
            color: var(--color-muted);
        }

        .footer-bottom a {
            color: var(--color-muted);
        }

        .footer-bottom a:hover {
            color: var(--color-accent);
        }

        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }
        }

        @media (max-width: 640px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
        }

        /* Generic section header */
        .section-header {
            margin-bottom: 32px;
        }

        .section-header .tag-label {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            font-family: var(--font-mono);
            color: var(--color-primary);
            text-transform: uppercase;
            letter-spacing: 0.05em;
            margin-bottom: 8px;
        }

        .section-header h2 {
            margin-bottom: 10px;
        }

        .section-header p {
            max-width: 580px;
            color: var(--color-text-soft);
            font-size: 15px;
            line-height: 1.8;
            margin-bottom: 0;
        }

        /* Scroll reveal */
        .reveal-hint {
            opacity: 0;
            transform: translateY(20px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }

        .reveal-hint.visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* Foundation overrides */
        .row {
            max-width: none;
        }

        .columns {
            padding-left: 0;
            padding-right: 0;
        }

        /* Utility */
        .text-center {
            text-align: center;
        }

        .text-muted {
            color: var(--color-muted);
        }

        .mt-0 {
            margin-top: 0;
        }

        .mb-0 {
            margin-bottom: 0;
        }

        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
            border-width: 0;
        }

/* roulang page: category2 */
:root {
            --bg-primary: #0B0F14;
            --bg-secondary: #10151C;
            --bg-card: #1C222A;
            --bg-deep: #0E1319;
            --bg-input: #0F141A;
            --color-primary: #FF5A1F;
            --color-primary-hover: #FF6B35;
            --color-accent: #00E5CC;
            --color-acid: #C8FF00;
            --color-muted: #6B7683;
            --color-text: #EAF0F5;
            --color-text-soft: #A0AAB4;
            --color-border: #2A3138;
            --color-lead: #3D4650;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --shadow-base: 0 8px 24px rgba(0, 0, 0, 0.35);
            --shadow-hover: 0 14px 36px rgba(0, 0, 0, 0.45);
            --font-sans: "Microsoft YaHei", "PingFang SC", "HarmonyOS Sans SC", "Noto Sans CJK SC", sans-serif;
            --font-mono: "Roboto Mono", "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
            --container-max: 1280px;
            --section-gap-desktop: 80px;
            --section-gap-tablet: 64px;
            --section-gap-mobile: 48px;
            --transition-base: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-sans);
            font-size: 15px;
            line-height: 1.75;
            color: var(--color-text);
            background: var(--bg-primary);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
            padding-top: 68px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--color-accent);
            text-decoration: none;
            transition: color var(--transition-base), background var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
        }
        a:hover {
            color: var(--color-primary);
        }
        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible,
        select:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 2px;
        }
        ul,
        ol {
            list-style: none;
        }
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        section {
            padding-top: var(--section-gap-desktop);
            padding-bottom: var(--section-gap-desktop);
        }
        @media (max-width: 1024px) {
            section {
                padding-top: var(--section-gap-tablet);
                padding-bottom: var(--section-gap-tablet);
            }
        }
        @media (max-width: 640px) {
            section {
                padding-top: var(--section-gap-mobile);
                padding-bottom: var(--section-gap-mobile);
            }
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

        /* ========== Header & Navigation ========== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(11, 15, 20, 0.96);
            backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--color-border);
            transition: box-shadow var(--transition-base);
        }
        .site-header.scrolled {
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
        }
        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 16px;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 22px;
            font-weight: 800;
            color: var(--color-text);
            letter-spacing: 0.02em;
            white-space: nowrap;
        }
        .nav-logo .logo-dot {
            width: 10px;
            height: 10px;
            background: var(--color-primary);
            border-radius: 50%;
            display: inline-block;
            animation: pulse-dot 2s infinite;
        }
        @keyframes pulse-dot {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.5; transform: scale(1.6); }
        }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 12px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-menu a {
            color: var(--color-text-soft);
            font-size: 14px;
            font-weight: 500;
            padding: 6px 10px;
            position: relative;
            transition: color var(--transition-base);
            white-space: nowrap;
            display: inline-block;
        }
        .nav-menu a:hover {
            color: var(--color-primary);
        }
        .nav-menu a.active {
            color: var(--color-primary);
            border-left: 2px solid var(--color-primary);
            padding-left: 8px;
        }
        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--color-primary);
            color: #101418 !important;
            padding: 10px 18px;
            border-radius: 10px;
            font-weight: 700;
            font-size: 14px;
            transition: background var(--transition-base), transform var(--transition-base);
            white-space: nowrap;
            border-left: none !important;
        }
        .nav-cta:hover {
            background: var(--color-primary-hover);
            transform: translateY(-1px);
            color: #101418 !important;
        }
        .nav-cta:active {
            transform: translateY(0);
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: transparent;
            border: none;
            padding: 8px;
            cursor: pointer;
        }
        .nav-toggle span {
            width: 22px;
            height: 2px;
            background: var(--color-text);
            transition: all var(--transition-base);
            display: block;
        }
        .nav-toggle.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .nav-toggle.active span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* Progress Steps */
        .progress-steps {
            background: rgba(14, 19, 25, 0.85);
            border-bottom: 1px solid var(--color-border);
            padding: 8px 0;
        }
        .progress-steps-inner {
            display: flex;
            align-items: center;
            gap: 4px;
            overflow-x: auto;
            white-space: nowrap;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: thin;
            scrollbar-color: var(--color-border) transparent;
        }
        .progress-steps-inner::-webkit-scrollbar {
            height: 3px;
        }
        .progress-steps-inner::-webkit-scrollbar-thumb {
            background: var(--color-border);
            border-radius: 2px;
        }
        .step-item {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 12px;
            font-weight: 500;
            color: var(--color-muted);
            padding: 6px 14px 6px 10px;
            border-radius: 20px;
            position: relative;
            transition: color var(--transition-base), background var(--transition-base);
            flex-shrink: 0;
        }
        .step-item:hover {
            color: var(--color-text);
        }
        .step-item.active {
            color: var(--color-primary);
            background: rgba(255, 90, 31, 0.1);
        }
        .step-item .step-dot {
            width: 20px;
            height: 20px;
            border-radius: 50%;
            background: var(--color-border);
            color: var(--color-text-soft);
            font-size: 11px;
            font-weight: 700;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-family: var(--font-mono);
            flex-shrink: 0;
            transition: background var(--transition-base), color var(--transition-base);
        }
        .step-item.active .step-dot {
            background: var(--color-primary);
            color: #101418;
        }
        .step-item.completed .step-dot {
            background: var(--color-accent);
            color: #101418;
        }
        .step-item::after {
            content: '';
            position: absolute;
            right: -2px;
            top: 50%;
            transform: translateY(-50%);
            width: 4px;
            height: 4px;
            border-radius: 50%;
            background: var(--color-border);
        }
        .step-item:last-child::after {
            display: none;
        }

        @media (max-width: 1024px) {
            .nav-menu {
                gap: 6px;
            }
            .nav-menu a {
                font-size: 13px;
                padding: 5px 7px;
            }
            .nav-cta {
                padding: 8px 14px;
                font-size: 13px;
            }
        }
        @media (max-width: 860px) {
            .nav-menu {
                display: none;
                position: absolute;
                top: 68px;
                left: 0;
                right: 0;
                background: rgba(11, 15, 20, 0.98);
                flex-direction: column;
                align-items: stretch;
                padding: 16px 24px;
                gap: 0;
                border-bottom: 1px solid var(--color-border);
                box-shadow: 0 12px 32px rgba(0, 0, 0, 0.5);
                max-height: calc(100vh - 68px);
                overflow-y: auto;
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-menu li {
                width: 100%;
            }
            .nav-menu a {
                display: block;
                padding: 12px 16px;
                font-size: 15px;
                border-bottom: 1px solid rgba(42, 49, 56, 0.5);
            }
            .nav-menu a.active {
                border-left: 3px solid var(--color-primary);
                padding-left: 13px;
            }
            .nav-menu .nav-cta {
                display: block;
                text-align: center;
                margin-top: 12px;
                border: none;
                border-radius: 10px;
                border-bottom: none;
            }
            .nav-toggle {
                display: flex;
            }
            .progress-steps-inner {
                gap: 2px;
            }
            .step-item {
                font-size: 11px;
                padding: 5px 10px 5px 6px;
            }
            .step-item .step-dot {
                width: 18px;
                height: 18px;
                font-size: 10px;
            }
        }
        @media (max-width: 640px) {
            .nav-wrapper {
                height: 60px;
            }
            body {
                padding-top: 60px;
            }
            .nav-logo {
                font-size: 19px;
            }
            .progress-steps {
                padding: 6px 0;
            }
            .step-item {
                font-size: 10px;
                padding: 4px 8px 4px 4px;
            }
        }

        /* ========== Hero / Category Hero ========== */
        .category-hero {
            position: relative;
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            min-height: 380px;
            display: flex;
            align-items: center;
            padding: 72px 0 56px;
            overflow: hidden;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(145deg, rgba(11, 15, 20, 0.88) 0%, rgba(11, 15, 20, 0.65) 45%, rgba(11, 15, 20, 0.82) 100%);
            z-index: 1;
        }
        .category-hero::after {
            content: '';
            position: absolute;
            top: -40%;
            right: -15%;
            width: 500px;
            height: 500px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(255, 90, 31, 0.12) 0%, transparent 70%);
            pointer-events: none;
            z-index: 1;
        }
        .category-hero .container {
            position: relative;
            z-index: 2;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(255, 90, 31, 0.15);
            color: var(--color-primary);
            border: 1px solid rgba(255, 90, 31, 0.35);
            border-radius: 20px;
            padding: 4px 14px;
            font-size: 12px;
            font-weight: 600;
            font-family: var(--font-mono);
            letter-spacing: 0.04em;
            margin-bottom: 16px;
        }
        .hero-badge .live-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--color-accent);
            animation: live-pulse 1.5s infinite;
        }
        @keyframes live-pulse {
            0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(0, 229, 204, 0.5); }
            50% { opacity: 0.6; box-shadow: 0 0 0 6px rgba(0, 229, 204, 0); }
        }
        .category-hero h1 {
            font-size: clamp(28px, 4.5vw, 48px);
            font-weight: 800;
            line-height: 1.25;
            color: var(--color-text);
            margin-bottom: 16px;
            letter-spacing: 0.01em;
        }
        .category-hero h1 .highlight {
            color: var(--color-primary);
        }
        .category-hero .hero-sub {
            font-size: 16px;
            line-height: 1.75;
            color: var(--color-text-soft);
            max-width: 720px;
            margin-bottom: 24px;
        }
        .hero-actions {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            font-weight: 700;
            padding: 12px 24px;
            border-radius: 10px;
            cursor: pointer;
            transition: background var(--transition-base), transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
            border: none;
            text-decoration: none;
            white-space: nowrap;
            font-family: var(--font-sans);
        }
        .btn-primary {
            background: var(--color-primary);
            color: #101418;
        }
        .btn-primary:hover {
            background: var(--color-primary-hover);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(255, 90, 31, 0.35);
            color: #101418;
        }
        .btn-primary:active {
            transform: translateY(0);
        }
        .btn-secondary {
            background: transparent;
            color: var(--color-text);
            border: 1px solid var(--color-text-soft);
        }
        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.06);
            border-color: var(--color-text);
            transform: translateY(-2px);
            color: var(--color-text);
        }

        /* ========== Category Layout: Sidebar + Main ========== */
        .tactics-layout {
            padding-top: 48px;
            padding-bottom: 56px;
        }
        .tactics-layout .grid-x {
            gap: 32px;
        }
        .sidebar {
            position: sticky;
            top: 120px;
            align-self: flex-start;
        }
        .sidebar-widget {
            background: var(--bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 20px;
            margin-bottom: 20px;
            box-shadow: var(--shadow-base);
        }
        .sidebar-widget h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 14px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-widget h3 .fa-solid {
            color: var(--color-primary);
            font-size: 14px;
        }
        .filter-group {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }
        .filter-link {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 8px 12px;
            border-radius: 6px;
            font-size: 13px;
            color: var(--color-text-soft);
            background: transparent;
            border: 1px solid transparent;
            transition: all var(--transition-base);
            cursor: pointer;
            text-align: left;
            font-family: var(--font-sans);
        }
        .filter-link:hover {
            color: var(--color-text);
            background: rgba(255, 255, 255, 0.04);
            border-color: var(--color-border);
        }
        .filter-link.active {
            color: var(--color-primary);
            background: rgba(255, 90, 31, 0.08);
            border-color: rgba(255, 90, 31, 0.3);
        }
        .filter-link .count {
            font-family: var(--font-mono);
            font-size: 11px;
            color: var(--color-muted);
            background: var(--bg-deep);
            padding: 2px 8px;
            border-radius: 10px;
            transition: all var(--transition-base);
        }
        .filter-link.active .count {
            background: rgba(255, 90, 31, 0.2);
            color: var(--color-primary);
        }
        .toc-list {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .toc-list a {
            font-size: 13px;
            color: var(--color-text-soft);
            padding: 6px 10px;
            border-radius: 6px;
            transition: all var(--transition-base);
            display: block;
        }
        .toc-list a:hover {
            color: var(--color-accent);
            background: rgba(0, 229, 204, 0.05);
        }

        /* ========== Article List ========== */
        .article-list-section {
            padding-top: 24px;
        }
        .section-heading {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 24px;
            flex-wrap: wrap;
            gap: 12px;
        }
        .section-heading h2 {
            font-size: 24px;
            font-weight: 700;
            color: var(--color-text);
            letter-spacing: 0.01em;
        }
        .section-heading .heading-tag {
            font-size: 12px;
            font-family: var(--font-mono);
            color: var(--color-accent);
            border: 1px solid rgba(0, 229, 204, 0.3);
            padding: 3px 12px;
            border-radius: 16px;
            background: rgba(0, 229, 204, 0.06);
        }
        .article-card {
            display: flex;
            gap: 20px;
            background: var(--bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            padding: 0;
            margin-bottom: 20px;
            box-shadow: var(--shadow-base);
            transition: border-color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base);
            cursor: pointer;
        }
        .article-card:hover {
            border-color: var(--color-accent);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .article-card .article-thumb {
            flex: 0 0 220px;
            max-width: 220px;
            min-height: 160px;
            overflow: hidden;
            position: relative;
            background: var(--bg-deep);
        }
        .article-card .article-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .article-card:hover .article-thumb img {
            transform: scale(1.05);
        }
        .article-card .article-body {
            padding: 18px 20px 16px 0;
            flex: 1;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }
        .article-meta {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 8px;
            flex-wrap: wrap;
        }
        .article-meta .date {
            font-family: var(--font-mono);
            font-size: 12px;
            color: var(--color-accent);
            letter-spacing: 0.03em;
        }
        .article-meta .tag {
            font-size: 11px;
            font-family: var(--font-mono);
            color: var(--color-text-soft);
            background: var(--bg-deep);
            border: 1px solid var(--color-border);
            padding: 1px 8px;
            border-radius: 10px;
            letter-spacing: 0.02em;
        }
        .article-card h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 8px;
            line-height: 1.4;
            margin-top: 0;
        }
        .article-card h3 a {
            color: var(--color-text);
        }
        .article-card h3 a:hover {
            color: var(--color-primary);
        }
        .article-card .article-excerpt {
            font-size: 13px;
            line-height: 1.7;
            color: var(--color-text-soft);
            margin-bottom: 12px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .article-card .read-more {
            font-size: 13px;
            font-weight: 600;
            color: var(--color-accent);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: color var(--transition-base), gap var(--transition-base);
            align-self: flex-start;
            border: none;
            background: transparent;
            cursor: pointer;
            padding: 0;
            font-family: var(--font-sans);
        }
        .article-card .read-more:hover {
            color: var(--color-primary);
            gap: 8px;
        }

        /* ========== Deep Analysis Section ========== */
        .deep-analysis {
            background: var(--bg-deep);
            border-top: 1px solid var(--color-border);
            border-bottom: 1px solid var(--color-border);
            padding-top: 56px;
            padding-bottom: 56px;
        }
        .deep-analysis-card {
            background: var(--bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 32px;
            box-shadow: var(--shadow-base);
            margin-bottom: 24px;
        }
        .deep-analysis-card h2 {
            font-size: 22px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .deep-analysis-card h2 .fa-solid {
            color: var(--color-primary);
            font-size: 18px;
        }
        .deep-analysis-card p {
            font-size: 14px;
            line-height: 1.85;
            color: var(--color-text-soft);
            margin-bottom: 12px;
        }
        .deep-analysis-card p strong {
            color: var(--color-text);
        }
        .data-stat-row {
            display: flex;
            gap: 24px;
            flex-wrap: wrap;
            margin: 16px 0;
            padding: 16px;
            background: var(--bg-deep);
            border-radius: var(--radius-sm);
            border: 1px solid var(--color-border);
        }
        .data-stat-item {
            flex: 1;
            min-width: 120px;
        }
        .data-stat-item .stat-label {
            font-size: 11px;
            font-family: var(--font-mono);
            color: var(--color-muted);
            letter-spacing: 0.03em;
            margin-bottom: 4px;
        }
        .data-stat-item .stat-value {
            font-size: 22px;
            font-weight: 700;
            font-family: var(--font-mono);
            color: var(--color-accent);
            font-variant-numeric: tabular-nums;
        }

        /* ========== CTA Section ========== */
        .category-cta {
            background: var(--bg-secondary);
            padding-top: 56px;
            padding-bottom: 56px;
        }
        .cta-banner {
            background: var(--bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 40px 36px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            flex-wrap: wrap;
            box-shadow: var(--shadow-base);
            position: relative;
            overflow: hidden;
        }
        .cta-banner::before {
            content: '';
            position: absolute;
            top: -60%;
            right: -10%;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(255, 90, 31, 0.08) 0%, transparent 70%);
            pointer-events: none;
        }
        .cta-banner .cta-text h2 {
            font-size: 22px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 8px;
        }
        .cta-banner .cta-text p {
            font-size: 14px;
            color: var(--color-text-soft);
            margin: 0;
        }
        .cta-banner .cta-actions {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            position: relative;
            z-index: 1;
        }

        /* ========== Footer ========== */
        .site-footer {
            background: #0B0E11;
            border-top: 1px solid var(--color-border);
            padding: 48px 0 24px;
            margin-top: 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 32px;
        }
        .footer-brand {
            font-size: 20px;
            font-weight: 800;
            color: var(--color-text);
            margin-bottom: 10px;
            letter-spacing: 0.02em;
        }
        .footer-desc {
            font-size: 13px;
            line-height: 1.7;
            color: var(--color-text-soft);
            margin: 0;
        }
        .footer-col h4 {
            font-size: 14px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 12px;
        }
        .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 6px;
        }
        .footer-col ul a {
            font-size: 13px;
            color: var(--color-muted);
            transition: color var(--transition-base);
        }
        .footer-col ul a:hover {
            color: var(--color-primary);
        }
        .footer-bottom {
            border-top: 1px solid var(--color-border);
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 12px;
            color: var(--color-muted);
            align-items: center;
        }
        .footer-bottom a {
            color: var(--color-muted);
        }
        .footer-bottom a:hover {
            color: var(--color-accent);
        }
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
        }
        @media (max-width: 640px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
        }

        /* ========== Responsive for Article Cards ========== */
        @media (max-width: 860px) {
            .sidebar {
                position: static;
                top: auto;
            }
            .tactics-layout .grid-x {
                gap: 20px;
            }
            .article-card {
                flex-direction: column;
            }
            .article-card .article-thumb {
                flex: 0 0 auto;
                max-width: 100%;
                min-height: 200px;
                width: 100%;
            }
            .article-card .article-body {
                padding: 16px 20px 20px;
            }
            .category-hero {
                min-height: 300px;
                padding: 56px 0 40px;
            }
        }
        @media (max-width: 640px) {
            .category-hero {
                min-height: 280px;
                padding: 40px 0 32px;
            }
            .category-hero h1 {
                font-size: 24px;
            }
            .category-hero .hero-sub {
                font-size: 14px;
            }
            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .hero-actions .btn {
                justify-content: center;
            }
            .article-card .article-thumb {
                min-height: 160px;
            }
            .article-card h3 {
                font-size: 15px;
            }
            .deep-analysis-card {
                padding: 20px 16px;
            }
            .cta-banner {
                padding: 28px 20px;
                flex-direction: column;
                text-align: center;
            }
            .cta-banner .cta-actions {
                justify-content: center;
            }
            .section-heading h2 {
                font-size: 20px;
            }
            .data-stat-row {
                gap: 12px;
                padding: 12px;
            }
            .data-stat-item .stat-value {
                font-size: 18px;
            }
        }

/* roulang page: category1 */
:root {
            --bg-primary: #0B0F14;
            --bg-secondary: #10151C;
            --bg-card: #1C222A;
            --bg-deep: #0E1319;
            --bg-input: #0F141A;
            --color-primary: #FF5A1F;
            --color-primary-hover: #FF6B35;
            --color-accent: #00E5CC;
            --color-acid: #C8FF00;
            --color-muted: #6B7683;
            --color-text: #EAF0F5;
            --color-text-soft: #A0AAB4;
            --color-border: #2A3138;
            --color-lead: #3D4650;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --shadow-base: 0 8px 24px rgba(0, 0, 0, 0.35);
            --shadow-hover: 0 14px 36px rgba(0, 0, 0, 0.45);
            --font-sans: "Microsoft YaHei", "PingFang SC", "HarmonyOS Sans SC", "Noto Sans CJK SC", sans-serif;
            --font-mono: "Roboto Mono", "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
            --container-max: 1280px;
            --section-gap-desktop: 96px;
            --section-gap-tablet: 72px;
            --section-gap-mobile: 52px;
            --transition-base: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
            box-sizing: border-box;
        }
        *, *::before, *::after {
            box-sizing: inherit;
        }
        body {
            font-family: var(--font-sans);
            font-size: 15px;
            line-height: 1.75;
            color: var(--color-text);
            background: var(--bg-primary);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
            margin: 0;
            padding: 0;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--color-accent);
            text-decoration: none;
            transition: color var(--transition-base), background var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
        }
        a:hover {
            color: var(--color-primary);
        }
        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible,
        select:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 2px;
        }
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        section {
            padding-top: var(--section-gap-desktop);
            padding-bottom: var(--section-gap-desktop);
        }
        h1, h2, h3, h4, h5, h6 {
            margin: 0 0 0.5em;
            line-height: 1.3;
            font-weight: 700;
            color: var(--color-text);
        }
        h1 {
            font-size: clamp(32px, 5vw, 56px);
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: 0.01em;
        }
        h2 {
            font-size: clamp(26px, 3.5vw, 36px);
            font-weight: 700;
        }
        h3 {
            font-size: clamp(20px, 2.5vw, 26px);
            font-weight: 600;
        }
        p {
            margin: 0 0 1.25em;
            color: var(--color-text-soft);
        }
        ul, ol {
            padding-left: 1.2em;
            margin: 0 0 1.25em;
            color: var(--color-text-soft);
        }
        .mono {
            font-family: var(--font-mono);
            font-variant-numeric: tabular-nums;
        }

        /* Header & Navigation */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(11, 15, 20, 0.96);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--color-border);
            transition: box-shadow var(--transition-base);
        }
        .site-header.scrolled {
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
        }
        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 16px;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 22px;
            font-weight: 800;
            color: var(--color-text);
            letter-spacing: 0.02em;
            white-space: nowrap;
        }
        .nav-logo:hover {
            color: var(--color-text);
        }
        .nav-logo .logo-dot {
            width: 10px;
            height: 10px;
            background: var(--color-primary);
            border-radius: 50%;
            display: inline-block;
            animation: pulse-dot 2s infinite;
        }
        @keyframes pulse-dot {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.5; transform: scale(1.4); }
        }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 20px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-menu li {
            margin: 0;
            padding: 0;
            list-style: none;
        }
        .nav-menu a {
            color: var(--color-text-soft);
            font-size: 14px;
            font-weight: 500;
            padding: 6px 10px;
            position: relative;
            transition: color var(--transition-base);
            white-space: nowrap;
            display: inline-block;
        }
        .nav-menu a:hover {
            color: var(--color-primary);
        }
        .nav-menu a.active {
            color: var(--color-primary);
            border-left: 2px solid var(--color-primary);
            padding-left: 8px;
        }
        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--color-primary);
            color: #101418 !important;
            padding: 10px 18px;
            border-radius: 10px;
            font-weight: 700;
            font-size: 14px;
            transition: background var(--transition-base), transform var(--transition-base);
            white-space: nowrap;
            border-left: none !important;
        }
        .nav-cta:hover {
            background: var(--color-primary-hover);
            transform: translateY(-1px);
            color: #101418 !important;
        }
        .nav-cta:active {
            transform: translateY(0);
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: transparent;
            border: none;
            padding: 8px;
            cursor: pointer;
            position: relative;
            z-index: 1001;
        }
        .nav-toggle span {
            width: 22px;
            height: 2px;
            background: var(--color-text);
            transition: all var(--transition-base);
            display: block;
            border-radius: 1px;
        }
        .nav-toggle.open span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .nav-toggle.open span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.open span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        /* Progress Steps */
        .progress-steps {
            background: var(--bg-deep);
            border-top: 1px solid var(--color-border);
            border-bottom: 1px solid var(--color-border);
            padding: 8px 0;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
        }
        .progress-steps-inner {
            display: flex;
            align-items: center;
            gap: 4px;
            min-width: max-content;
        }
        .step-item {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 6px 12px;
            font-size: 12px;
            font-weight: 600;
            color: var(--color-muted);
            border-radius: 20px;
            transition: all var(--transition-base);
            white-space: nowrap;
        }
        .step-item .step-dot {
            width: 22px;
            height: 22px;
            border-radius: 50%;
            background: var(--color-lead);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 11px;
            font-weight: 700;
            color: var(--color-text-soft);
            transition: all var(--transition-base);
            flex-shrink: 0;
        }
        .step-item:hover {
            color: var(--color-accent);
            background: rgba(0, 229, 204, 0.06);
        }
        .step-item:hover .step-dot {
            background: var(--color-accent);
            color: #101418;
        }
        .step-item.active {
            color: var(--color-primary);
            background: rgba(255, 90, 31, 0.08);
        }
        .step-item.active .step-dot {
            background: var(--color-primary);
            color: #101418;
        }
        .step-item.completed .step-dot {
            background: var(--color-accent);
            color: #101418;
        }
        .step-item.completed {
            color: var(--color-accent);
        }

        /* Hero Section */
        .category-hero {
            position: relative;
            padding: 140px 0 80px;
            background: linear-gradient(135deg, rgba(11, 15, 20, 0.92) 0%, rgba(11, 15, 20, 0.75) 50%, rgba(11, 15, 20, 0.92) 100%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            background-color: var(--bg-primary);
            border-bottom: 1px solid var(--color-border);
            overflow: hidden;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: radial-gradient(circle at 70% 30%, rgba(255, 90, 31, 0.12) 0%, transparent 60%);
            pointer-events: none;
        }
        .category-hero .container {
            position: relative;
            z-index: 2;
        }
        .category-hero h1 {
            margin-bottom: 16px;
            max-width: 800px;
        }
        .category-hero .hero-subtitle {
            font-size: 18px;
            color: var(--color-text-soft);
            max-width: 680px;
            margin-bottom: 24px;
            line-height: 1.7;
        }
        .category-hero .hero-desc {
            font-size: 15px;
            color: var(--color-text-soft);
            max-width: 820px;
            line-height: 1.85;
            margin-bottom: 32px;
        }
        .hero-badge-row {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 24px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 14px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 600;
            font-family: var(--font-mono);
            background: var(--bg-card);
            border: 1px solid var(--color-border);
            color: var(--color-text-soft);
        }
        .hero-badge .live-indicator {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--color-accent);
            display: inline-block;
            animation: pulse-live 1.5s infinite;
        }
        @keyframes pulse-live {
            0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(0, 229, 204, 0.4); }
            50% { opacity: 0.6; box-shadow: 0 0 0 6px rgba(0, 229, 204, 0); }
        }
        .hero-cta-row {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            align-items: center;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 22px;
            border-radius: 10px;
            font-weight: 700;
            font-size: 14px;
            transition: all var(--transition-base);
            cursor: pointer;
            border: none;
            line-height: 1.2;
            text-align: center;
            justify-content: center;
        }
        .btn-primary {
            background: var(--color-primary);
            color: #101418;
        }
        .btn-primary:hover {
            background: var(--color-primary-hover);
            transform: translateY(-1px);
            box-shadow: 0 4px 14px rgba(255, 90, 31, 0.35);
            color: #101418;
        }
        .btn-primary:active {
            transform: translateY(0);
        }
        .btn-secondary {
            background: transparent;
            color: var(--color-text);
            border: 1px solid var(--color-border);
        }
        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.06);
            border-color: var(--color-text-soft);
            color: var(--color-text);
        }

        /* Ranking Filter Tags */
        .filter-bar {
            padding: 24px 0;
            border-bottom: 1px solid var(--color-border);
            background: var(--bg-secondary);
        }
        .filter-row {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            align-items: center;
        }
        .filter-tag {
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 600;
            background: var(--bg-card);
            border: 1px solid var(--color-border);
            color: var(--color-text-soft);
            cursor: pointer;
            transition: all var(--transition-base);
            white-space: nowrap;
        }
        .filter-tag:hover {
            border-color: var(--color-primary);
            color: var(--color-primary);
        }
        .filter-tag.active {
            background: rgba(255, 90, 31, 0.12);
            border-color: var(--color-primary);
            color: var(--color-primary);
        }
        .filter-meta {
            font-size: 12px;
            color: var(--color-muted);
            font-family: var(--font-mono);
            margin-left: auto;
        }

        /* Ranking List Section */
        .ranking-section {
            background: var(--bg-primary);
        }
        .ranking-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
            margin-top: 32px;
        }
        .ranking-row {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 18px 20px;
            background: var(--bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            transition: all var(--transition-base);
            position: relative;
            overflow: hidden;
        }
        .ranking-row::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            bottom: 0;
            width: 3px;
            background: transparent;
            transition: background var(--transition-base);
        }
        .ranking-row:hover {
            border-color: var(--color-accent);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .ranking-row:hover::before {
            background: var(--color-accent);
        }
        .rank-number {
            font-family: var(--font-mono);
            font-size: 28px;
            font-weight: 800;
            min-width: 48px;
            text-align: center;
            color: var(--color-text);
            flex-shrink: 0;
        }
        .rank-number.top1 { color: #FFD700; }
        .rank-number.top2 { color: #C0C0C0; }
        .rank-number.top3 { color: #CD7F32; }
        .rank-info {
            flex: 1;
            min-width: 0;
        }
        .rank-name {
            font-size: 17px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 4px;
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }
        .rank-league {
            font-size: 12px;
            color: var(--color-muted);
            background: var(--bg-deep);
            padding: 2px 10px;
            border-radius: 4px;
            font-family: var(--font-mono);
            font-weight: 500;
        }
        .rank-sub {
            font-size: 13px;
            color: var(--color-muted);
        }
        .rank-metrics {
            display: flex;
            gap: 24px;
            align-items: center;
            flex-shrink: 0;
        }
        .rank-metric {
            text-align: right;
        }
        .rank-metric .label {
            font-size: 11px;
            color: var(--color-muted);
            text-transform: uppercase;
            letter-spacing: 0.04em;
            margin-bottom: 2px;
            font-weight: 600;
        }
        .rank-metric .value {
            font-family: var(--font-mono);
            font-size: 20px;
            font-weight: 700;
            color: var(--color-text);
            font-variant-numeric: tabular-nums;
        }
        .rank-trend {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-family: var(--font-mono);
            font-size: 14px;
            font-weight: 600;
            min-width: 70px;
            justify-content: flex-end;
        }
        .rank-trend.up { color: var(--color-accent); }
        .rank-trend.down { color: #FF4444; }
        .rank-trend.flat { color: var(--color-muted); }
        .rank-badge {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 3px 10px;
            border-radius: 4px;
            font-size: 11px;
            font-weight: 600;
            font-family: var(--font-mono);
            background: rgba(0, 229, 204, 0.1);
            border: 1px solid rgba(0, 229, 204, 0.3);
            color: var(--color-accent);
            white-space: nowrap;
        }
        .rank-badge.hot {
            background: rgba(255, 90, 31, 0.1);
            border-color: rgba(255, 90, 31, 0.3);
            color: var(--color-primary);
        }
        .rank-badge.rising {
            background: rgba(200, 255, 0, 0.08);
            border-color: rgba(200, 255, 0, 0.25);
            color: var(--color-acid);
        }

        /* Insight / Deep Content */
        .insight-section {
            background: var(--bg-secondary);
            border-top: 1px solid var(--color-border);
            border-bottom: 1px solid var(--color-border);
        }
        .insight-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
            margin-top: 24px;
        }
        .insight-card {
            background: var(--bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 28px;
            transition: all var(--transition-base);
        }
        .insight-card:hover {
            border-color: var(--color-accent);
            box-shadow: var(--shadow-base);
        }
        .insight-card h3 {
            font-size: 19px;
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .insight-card p {
            font-size: 14px;
            color: var(--color-text-soft);
            line-height: 1.8;
            margin-bottom: 0;
        }
        .insight-card .highlight-num {
            font-family: var(--font-mono);
            font-size: 32px;
            font-weight: 800;
            color: var(--color-primary);
            display: block;
            margin-bottom: 8px;
        }

        /* FAQ Section */
        .faq-section {
            background: var(--bg-primary);
        }
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
            margin-top: 24px;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: border-color var(--transition-base);
        }
        .faq-item:hover {
            border-color: var(--color-lead);
        }
        .faq-item.open {
            border-color: var(--color-accent);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            padding: 18px 20px;
            background: transparent;
            border: none;
            cursor: pointer;
            font-size: 15px;
            font-weight: 600;
            color: var(--color-text);
            text-align: left;
            transition: color var(--transition-base);
            border-left: 3px solid var(--color-primary);
        }
        .faq-item.open .faq-question {
            border-left-color: var(--color-accent);
            color: var(--color-accent);
        }
        .faq-question .faq-icon {
            font-size: 16px;
            color: var(--color-muted);
            transition: all var(--transition-base);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question .faq-icon {
            transform: rotate(45deg);
            color: var(--color-accent);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            padding: 0 20px;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 20px 18px;
        }
        .faq-answer p {
            font-size: 14px;
            color: var(--color-text-soft);
            line-height: 1.8;
            margin-bottom: 0;
            padding-left: 12px;
            border-left: 1px solid var(--color-border);
        }

        /* CTA Section */
        .cta-section {
            background: var(--bg-deep);
            border-top: 1px solid var(--color-border);
        }
        .cta-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }
        .cta-left h2 {
            margin-bottom: 12px;
        }
        .cta-left p {
            font-size: 15px;
            margin-bottom: 20px;
        }
        .cta-benefits {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .cta-benefits li {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 14px;
            border-radius: 8px;
            font-size: 13px;
            font-weight: 500;
            background: var(--bg-card);
            border: 1px solid var(--color-border);
            color: var(--color-text-soft);
        }
        .cta-benefits li i {
            color: var(--color-accent);
            font-size: 12px;
        }
        .cta-card {
            background: var(--bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 28px;
        }
        .cta-card h4 {
            font-size: 17px;
            margin-bottom: 16px;
            color: var(--color-text);
        }
        .cta-form .form-group {
            margin-bottom: 14px;
        }
        .cta-form label {
            display: block;
            font-size: 12px;
            font-weight: 600;
            color: var(--color-text-soft);
            margin-bottom: 6px;
        }
        .cta-form input,
        .cta-form select,
        .cta-form textarea {
            width: 100%;
            padding: 12px 14px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--color-border);
            background: var(--bg-input);
            color: var(--color-text);
            font-size: 14px;
            font-family: var(--font-sans);
            transition: all var(--transition-base);
            appearance: none;
            -webkit-appearance: none;
        }
        .cta-form input:focus,
        .cta-form select:focus,
        .cta-form textarea:focus {
            border-color: var(--color-primary);
            box-shadow: 0 0 0 3px rgba(255, 90, 31, 0.2);
            outline: none;
        }
        .cta-form input::placeholder,
        .cta-form textarea::placeholder {
            color: var(--color-muted);
        }
        .cta-form select {
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%236B7683' d='M6 8L0 0h12z'/%3E%3C/svg%3E");
            background-repeat: no-repeat;
            background-position: right 14px center;
            padding-right: 36px;
        }
        .cta-form textarea {
            min-height: 80px;
            resize: vertical;
        }
        .cta-form .btn {
            width: 100%;
            margin-top: 8px;
        }
        .cta-form .form-note {
            font-size: 11px;
            color: var(--color-muted);
            margin-top: 10px;
            text-align: center;
        }

        /* Footer */
        .site-footer {
            background: #0B0E11;
            border-top: 1px solid var(--color-border);
            padding: 48px 0 24px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 32px;
        }
        .footer-brand {
            font-size: 22px;
            font-weight: 800;
            color: var(--color-text);
            margin-bottom: 8px;
        }
        .footer-desc {
            font-size: 13px;
            color: var(--color-text-soft);
            line-height: 1.7;
            margin-bottom: 0;
        }
        .footer-col h4 {
            font-size: 14px;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--color-text);
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul li a {
            color: var(--color-text-soft);
            font-size: 13px;
            transition: color var(--transition-base);
        }
        .footer-col ul li a:hover {
            color: var(--color-primary);
        }
        .footer-bottom {
            border-top: 1px solid var(--color-border);
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            align-items: center;
            justify-content: space-between;
            font-size: 12px;
            color: var(--color-muted);
        }
        .footer-bottom a {
            color: var(--color-muted);
            font-size: 12px;
        }
        .footer-bottom a:hover {
            color: var(--color-accent);
        }
        .footer-bottom span {
            white-space: nowrap;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .cta-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .insight-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .ranking-row {
                flex-wrap: wrap;
                gap: 12px;
            }
            .rank-metrics {
                margin-left: 64px;
            }
        }
        @media (max-width: 768px) {
            section {
                padding-top: var(--section-gap-tablet);
                padding-bottom: var(--section-gap-tablet);
            }
            .nav-menu {
                position: absolute;
                top: 68px;
                left: 0;
                right: 0;
                background: rgba(11, 15, 20, 0.98);
                flex-direction: column;
                align-items: flex-start;
                gap: 0;
                padding: 16px 24px;
                border-bottom: 1px solid var(--color-border);
                display: none;
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-menu li {
                width: 100%;
            }
            .nav-menu a {
                display: block;
                padding: 10px 8px;
                font-size: 15px;
                border-left: none;
            }
            .nav-menu a.active {
                border-left: 2px solid var(--color-primary);
                padding-left: 8px;
            }
            .nav-cta {
                display: inline-flex;
                margin-top: 8px;
                width: 100%;
                justify-content: center;
            }
            .nav-toggle {
                display: flex;
            }
            .progress-steps {
                display: block;
            }
            .category-hero {
                padding: 110px 0 48px;
            }
            .category-hero h1 {
                font-size: 28px;
            }
            .rank-metrics {
                margin-left: 0;
                flex-wrap: wrap;
                gap: 12px;
                width: 100%;
                justify-content: space-between;
            }
            .rank-metric {
                text-align: left;
            }
            .rank-trend {
                justify-content: flex-start;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
        }
        @media (max-width: 520px) {
            section {
                padding-top: var(--section-gap-mobile);
                padding-bottom: var(--section-gap-mobile);
            }
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .category-hero h1 {
                font-size: 24px;
            }
            .category-hero .hero-subtitle {
                font-size: 15px;
            }
            .category-hero .hero-desc {
                font-size: 13px;
            }
            .ranking-row {
                padding: 14px 14px;
            }
            .rank-number {
                font-size: 22px;
                min-width: 36px;
            }
            .rank-name {
                font-size: 15px;
            }
            .rank-metric .value {
                font-size: 17px;
            }
            .btn {
                padding: 10px 16px;
                font-size: 13px;
                width: 100%;
            }
            .hero-cta-row {
                flex-direction: column;
                width: 100%;
            }
            .filter-meta {
                margin-left: 0;
                width: 100%;
                margin-top: 4px;
            }
        }

/* roulang page: category4 */
:root {
            --bg-primary: #0B0F14;
            --bg-secondary: #10151C;
            --bg-card: #1C222A;
            --bg-deep: #0E1319;
            --bg-input: #0F141A;
            --color-primary: #FF5A1F;
            --color-primary-hover: #FF6B35;
            --color-accent: #00E5CC;
            --color-acid: #C8FF00;
            --color-muted: #6B7683;
            --color-text: #EAF0F5;
            --color-text-soft: #A0AAB4;
            --color-border: #2A3138;
            --color-lead: #3D4650;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --shadow-base: 0 8px 24px rgba(0, 0, 0, 0.35);
            --shadow-hover: 0 14px 36px rgba(0, 0, 0, 0.45);
            --font-sans: "Microsoft YaHei", "PingFang SC", "HarmonyOS Sans SC", "Noto Sans CJK SC", sans-serif;
            --font-mono: "Roboto Mono", "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
            --container-max: 1280px;
            --section-gap-desktop: 96px;
            --section-gap-tablet: 72px;
            --section-gap-mobile: 52px;
            --transition-base: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-sans);
            font-size: 15px;
            line-height: 1.75;
            color: var(--color-text);
            background: var(--bg-primary);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: var(--color-accent);
            text-decoration: none;
            transition: color var(--transition-base), background var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base);
        }

        a:hover {
            color: var(--color-primary);
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible,
        select:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 2px;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        section {
            padding-top: var(--section-gap-desktop);
            padding-bottom: var(--section-gap-desktop);
        }

        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(11, 15, 20, 0.96);
            backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--color-border);
            transition: box-shadow var(--transition-base);
        }

        .site-header.scrolled {
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
        }

        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 16px;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 22px;
            font-weight: 800;
            color: var(--color-text);
            letter-spacing: 0.02em;
            white-space: nowrap;
        }

        .nav-logo .logo-dot {
            width: 10px;
            height: 10px;
            background: var(--color-primary);
            border-radius: 50%;
            display: inline-block;
            animation: pulse-dot 2s infinite;
        }

        @keyframes pulse-dot {
            0%,
            100% {
                box-shadow: 0 0 0 0 rgba(255, 90, 31, 0.5);
            }
            50% {
                box-shadow: 0 0 0 6px rgba(255, 90, 31, 0);
            }
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 18px;
            list-style: none;
        }

        .nav-menu a {
            color: var(--color-text-soft);
            font-size: 14px;
            font-weight: 500;
            padding: 6px 10px;
            position: relative;
            transition: color var(--transition-base);
            white-space: nowrap;
        }

        .nav-menu a:hover {
            color: var(--color-primary);
        }

        .nav-menu a.active {
            color: var(--color-primary);
            border-left: 2px solid var(--color-primary);
            padding-left: 8px;
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--color-primary);
            color: #101418 !important;
            padding: 10px 18px;
            border-radius: 10px;
            font-weight: 700;
            font-size: 14px;
            transition: background var(--transition-base), transform var(--transition-base);
            white-space: nowrap;
        }

        .nav-cta:hover {
            background: var(--color-primary-hover);
            transform: translateY(-1px);
            color: #101418 !important;
        }

        .nav-cta:active {
            transform: translateY(0);
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: transparent;
            border: none;
            padding: 8px;
            cursor: pointer;
        }

        .nav-toggle span {
            width: 22px;
            height: 2px;
            background: var(--color-text);
            transition: all var(--transition-base);
        }

        .progress-steps {
            background: rgba(14, 19, 25, 0.95);
            border-bottom: 1px solid var(--color-border);
            padding: 6px 0;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
        }

        .progress-steps::-webkit-scrollbar {
            display: none;
        }

        .progress-steps-inner {
            display: flex;
            align-items: center;
            gap: 24px;
            min-width: max-content;
        }

        .step-item {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 12px;
            font-weight: 500;
            color: var(--color-muted);
            white-space: nowrap;
            padding: 4px 0;
            transition: color var(--transition-base);
        }

        .step-item:hover {
            color: var(--color-text);
        }

        .step-item.active {
            color: var(--color-primary);
        }

        .step-dot {
            width: 20px;
            height: 20px;
            border-radius: 50%;
            border: 1px solid var(--color-border);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 10px;
            font-family: var(--font-mono);
            transition: all var(--transition-base);
        }

        .step-item.active .step-dot {
            border-color: var(--color-primary);
            color: var(--color-primary);
        }

        .main-content {
            padding-top: 130px;
        }

        .profile-hero {
            position: relative;
            background: url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
            background-color: var(--bg-deep);
            padding: 80px 0 90px;
            overflow: hidden;
            border-bottom: 1px solid var(--color-border);
        }

        .profile-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(11, 15, 20, 0.92) 0%, rgba(11, 15, 20, 0.72) 45%, rgba(11, 15, 20, 0.88) 100%);
            z-index: 1;
        }

        .profile-hero .container {
            position: relative;
            z-index: 2;
        }

        .profile-hero h1 {
            font-size: clamp(32px, 5vw, 52px);
            font-weight: 800;
            line-height: 1.25;
            color: var(--color-text);
            margin-bottom: 16px;
        }

        .profile-hero h1 .accent {
            color: var(--color-primary);
        }

        .profile-hero .subtitle {
            font-size: 17px;
            color: var(--color-text-soft);
            max-width: 720px;
            line-height: 1.8;
            margin-bottom: 28px;
        }

        .hero-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 12px;
            font-family: var(--font-mono);
            padding: 6px 12px;
            border-radius: 20px;
            background: rgba(0, 229, 204, 0.1);
            border: 1px solid rgba(0, 229, 204, 0.3);
            color: var(--color-accent);
            font-weight: 500;
        }

        .hero-badge.live {
            background: rgba(255, 90, 31, 0.1);
            border-color: rgba(255, 90, 31, 0.3);
            color: var(--color-primary);
        }

        .hero-badge .dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: currentColor;
            animation: pulse-dot 1.5s infinite;
        }

        .profile-section {
            padding-top: 68px;
            padding-bottom: 68px;
        }

        .section-title {
            font-size: 28px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 8px;
            line-height: 1.3;
        }

        .section-subtitle {
            font-size: 15px;
            color: var(--color-text-soft);
            max-width: 680px;
            line-height: 1.75;
            margin-bottom: 36px;
        }

        .profile-intro {
            background: var(--bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 28px 32px;
            margin-bottom: 44px;
            position: relative;
        }

        .profile-intro::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0;
            bottom: 0;
            width: 3px;
            background: var(--color-primary);
            border-radius: var(--radius-sm) 0 0 var(--radius-sm);
        }

        .profile-intro p {
            color: var(--color-text-soft);
            font-size: 15px;
            line-height: 1.9;
            margin-bottom: 0;
        }

        .profile-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
            margin-bottom: 48px;
        }

        .profile-card {
            background: var(--bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition-base);
            position: relative;
        }

        .profile-card:hover {
            border-color: var(--color-accent);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }

        .profile-card:nth-child(even) {
            margin-top: 32px;
        }

        .profile-card-image {
            position: relative;
            height: 240px;
            overflow: hidden;
            background: var(--bg-deep);
        }

        .profile-card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .profile-card:hover .profile-card-image img {
            transform: scale(1.05);
        }

        .profile-card-image::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(11, 15, 20, 0.1) 30%, rgba(11, 15, 20, 0.85) 100%);
        }

        .profile-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            z-index: 2;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 11px;
            font-family: var(--font-mono);
            padding: 4px 10px;
            border-radius: 16px;
            background: rgba(11, 15, 20, 0.85);
            border: 1px solid var(--color-primary);
            color: var(--color-primary);
            font-weight: 500;
            backdrop-filter: blur(8px);
        }

        .profile-card-body {
            padding: 22px 24px 24px;
        }

        .profile-card-body h3 {
            font-size: 21px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 4px;
        }

        .profile-role {
            font-size: 13px;
            font-family: var(--font-mono);
            color: var(--color-accent);
            margin-bottom: 12px;
        }

        .profile-card-body p {
            font-size: 14px;
            color: var(--color-text-soft);
            line-height: 1.75;
            margin-bottom: 18px;
        }

        .profile-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-bottom: 18px;
        }

        .stat-pill {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            font-size: 12px;
            font-family: var(--font-mono);
            padding: 5px 10px;
            border-radius: 6px;
            background: var(--bg-deep);
            border: 1px solid var(--color-border);
            color: var(--color-text-soft);
        }

        .stat-pill .num {
            color: var(--color-text);
            font-weight: 600;
        }

        .stat-pill .trend-up {
            color: var(--color-accent);
        }

        .stat-pill .trend-down {
            color: var(--color-primary);
        }

        .profile-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 600;
            color: var(--color-accent);
            transition: color var(--transition-base);
        }

        .profile-link:hover {
            color: var(--color-primary);
        }

        .profile-link i {
            font-size: 11px;
        }

        .team-section {
            background: var(--bg-deep);
            border-top: 1px solid var(--color-border);
            border-bottom: 1px solid var(--color-border);
            padding-top: 68px;
            padding-bottom: 68px;
        }

        .team-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-bottom: 40px;
        }

        .team-card {
            background: var(--bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 24px;
            transition: all var(--transition-base);
        }

        .team-card:hover {
            border-color: var(--color-primary);
            box-shadow: var(--shadow-base);
        }

        .team-card-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 14px;
        }

        .team-card-header h4 {
            font-size: 18px;
            font-weight: 700;
            color: var(--color-text);
            margin: 0;
        }

        .team-logo-placeholder {
            width: 42px;
            height: 42px;
            border-radius: 10px;
            background: var(--bg-deep);
            border: 1px solid var(--color-border);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: var(--color-primary);
        }

        .team-metrics {
            display: flex;
            flex-direction: column;
            gap: 8px;
            margin-bottom: 16px;
        }

        .team-metric-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 13px;
            color: var(--color-text-soft);
        }

        .metric-bar {
            flex: 1;
            height: 5px;
            background: var(--bg-deep);
            border-radius: 3px;
            margin: 0 10px;
            overflow: hidden;
        }

        .metric-bar-fill {
            height: 100%;
            background: var(--color-primary);
            border-radius: 3px;
            transition: width var(--transition-base);
        }

        .metric-bar-fill.accent {
            background: var(--color-accent);
        }

        .metric-value {
            font-size: 13px;
            font-family: var(--font-mono);
            font-weight: 600;
            color: var(--color-text);
            min-width: 40px;
            text-align: right;
        }

        .team-card p {
            font-size: 13px;
            color: var(--color-text-soft);
            line-height: 1.7;
            margin-bottom: 12px;
        }

        .team-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .team-tag {
            font-size: 11px;
            font-family: var(--font-mono);
            padding: 3px 8px;
            border-radius: 4px;
            background: rgba(200, 255, 0, 0.08);
            border: 1px solid rgba(200, 255, 0, 0.2);
            color: var(--color-acid);
        }

        .team-tag.warm {
            background: rgba(255, 90, 31, 0.08);
            border-color: rgba(255, 90, 31, 0.2);
            color: var(--color-primary);
        }

        .team-tag.cool {
            background: rgba(0, 229, 204, 0.08);
            border-color: rgba(0, 229, 204, 0.2);
            color: var(--color-accent);
        }

        .faq-section {
            padding-top: 68px;
            padding-bottom: 68px;
        }

        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
            max-width: 820px;
        }

        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: all var(--transition-base);
        }

        .faq-item:hover {
            border-color: var(--color-lead);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            padding: 18px 20px;
            cursor: pointer;
            font-weight: 600;
            font-size: 15px;
            color: var(--color-text);
            transition: color var(--transition-base);
            background: transparent;
            border: none;
            width: 100%;
            text-align: left;
            font-family: var(--font-sans);
        }

        .faq-question:hover {
            color: var(--color-primary);
        }

        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 20px;
            height: 20px;
            border-radius: 50%;
            border: 1px solid var(--color-border);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 11px;
            color: var(--color-muted);
            transition: all var(--transition-base);
        }

        .faq-item.open .faq-question .faq-icon {
            border-color: var(--color-accent);
            color: var(--color-accent);
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease-in-out;
        }

        .faq-item.open .faq-answer {
            max-height: 200px;
        }

        .faq-answer-inner {
            padding: 0 20px 18px 20px;
            font-size: 14px;
            color: var(--color-text-soft);
            line-height: 1.8;
            border-left: 3px solid var(--color-accent);
            margin-left: 20px;
        }

        .cta-section {
            padding-top: 68px;
            padding-bottom: 68px;
            background: var(--bg-deep);
            border-top: 1px solid var(--color-border);
        }

        .cta-wrapper {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
            align-items: center;
        }

        .cta-info h3 {
            font-size: 26px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 10px;
        }

        .cta-info p {
            font-size: 15px;
            color: var(--color-text-soft);
            line-height: 1.75;
            margin-bottom: 18px;
        }

        .cta-badges {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .cta-badge {
            font-size: 12px;
            font-family: var(--font-mono);
            padding: 6px 12px;
            border-radius: 6px;
            background: rgba(0, 229, 204, 0.08);
            border: 1px solid rgba(0, 229, 204, 0.2);
            color: var(--color-accent);
        }

        .cta-form-card {
            background: var(--bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 28px;
        }

        .cta-form-card label {
            display: block;
            font-size: 13px;
            font-weight: 500;
            color: var(--color-text-soft);
            margin-bottom: 6px;
        }

        .cta-form-card input,
        .cta-form-card select,
        .cta-form-card textarea {
            width: 100%;
            background: var(--bg-input);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-sm);
            padding: 12px 14px;
            color: var(--color-text);
            font-size: 14px;
            font-family: var(--font-sans);
            margin-bottom: 14px;
            transition: border-color var(--transition-base), box-shadow var(--transition-base);
        }

        .cta-form-card input:focus,
        .cta-form-card select:focus,
        .cta-form-card textarea:focus {
            border-color: var(--color-primary);
            box-shadow: 0 0 0 3px rgba(255, 90, 31, 0.2);
            outline: none;
        }

        .cta-form-card input::placeholder,
        .cta-form-card textarea::placeholder {
            color: var(--color-muted);
        }

        .cta-form-card textarea {
            min-height: 80px;
            resize: vertical;
        }

        .cta-submit {
            width: 100%;
            background: var(--color-primary);
            color: #101418;
            font-weight: 700;
            font-size: 15px;
            padding: 13px 20px;
            border: none;
            border-radius: var(--radius-sm);
            cursor: pointer;
            transition: background var(--transition-base), transform var(--transition-base);
            font-family: var(--font-sans);
        }

        .cta-submit:hover {
            background: var(--color-primary-hover);
            transform: translateY(-1px);
        }

        .cta-submit:active {
            transform: translateY(0);
        }

        .cta-form-card .privacy-note {
            font-size: 12px;
            color: var(--color-muted);
            text-align: center;
            margin-top: 10px;
            margin-bottom: 0;
        }

        .site-footer {
            background: var(--bg-deep);
            border-top: 1px solid var(--color-border);
            padding-top: 52px;
            padding-bottom: 24px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 36px;
        }

        .footer-brand {
            font-size: 20px;
            font-weight: 800;
            color: var(--color-text);
            margin-bottom: 10px;
        }

        .footer-desc {
            font-size: 13px;
            color: var(--color-text-soft);
            line-height: 1.75;
            max-width: 320px;
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 14px;
        }

        .footer-col ul {
            list-style: none;
        }

        .footer-col ul li {
            margin-bottom: 8px;
        }

        .footer-col ul li a {
            font-size: 13px;
            color: var(--color-text-soft);
            transition: color var(--transition-base);
        }

        .footer-col ul li a:hover {
            color: var(--color-primary);
        }

        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 12px;
            padding-top: 18px;
            border-top: 1px solid var(--color-border);
            font-size: 12px;
            color: var(--color-muted);
        }

        .footer-bottom a {
            color: var(--color-text-soft);
        }

        .footer-bottom a:hover {
            color: var(--color-primary);
        }

        @media (max-width: 1024px) {
            .section-gap-desktop {
                --section-gap-desktop: 72px;
            }
            section {
                padding-top: 72px;
                padding-bottom: 72px;
            }
            .profile-grid {
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }
            .profile-card:nth-child(even) {
                margin-top: 24px;
            }
            .team-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 18px;
            }
            .cta-wrapper {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-grid {
                grid-template-columns: 2fr 1fr 1fr;
                gap: 24px;
            }
        }

        @media (max-width: 768px) {
            .main-content {
                padding-top: 118px;
            }
            .profile-hero {
                padding: 48px 0 56px;
            }
            .profile-hero h1 {
                font-size: 28px;
            }
            .profile-hero .subtitle {
                font-size: 15px;
            }
            .profile-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .profile-card:nth-child(even) {
                margin-top: 0;
            }
            .profile-card-image {
                height: 200px;
            }
            .team-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .cta-form-card {
                padding: 20px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }
            .section-title {
                font-size: 23px;
            }
            .profile-intro {
                padding: 20px 22px;
            }
        }

        @media (max-width: 640px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            section {
                padding-top: 52px;
                padding-bottom: 52px;
            }
            .nav-wrapper {
                height: 58px;
            }
            .nav-logo {
                font-size: 19px;
            }
            .nav-toggle {
                display: flex;
            }
            .nav-menu {
                display: none;
                position: absolute;
                top: 58px;
                left: 0;
                right: 0;
                flex-direction: column;
                gap: 0;
                background: rgba(11, 15, 20, 0.98);
                border-bottom: 1px solid var(--color-border);
                padding: 16px 16px 20px;
                z-index: 999;
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-menu li {
                width: 100%;
            }
            .nav-menu a {
                display: block;
                padding: 12px 8px;
                font-size: 15px;
                border-bottom: 1px solid rgba(42, 49, 56, 0.4);
            }
            .nav-menu a.active {
                border-left: none;
                border-bottom-color: var(--color-primary);
                padding-left: 8px;
            }
            .nav-cta {
                margin-top: 8px;
                justify-content: center;
                border-bottom: none !important;
            }
            .progress-steps-inner {
                gap: 14px;
            }
            .step-item {
                font-size: 11px;
            }
            .step-dot {
                width: 18px;
                height: 18px;
                font-size: 9px;
            }
            .main-content {
                padding-top: 104px;
            }
            .profile-hero {
                padding: 36px 0 44px;
            }
            .profile-hero h1 {
                font-size: 24px;
            }
            .profile-hero .subtitle {
                font-size: 14px;
            }
            .hero-meta {
                gap: 8px;
            }
            .profile-card-image {
                height: 180px;
            }
            .profile-card-body {
                padding: 16px 18px 18px;
            }
            .profile-card-body h3 {
                font-size: 18px;
            }
            .profile-stats {
                gap: 8px;
            }
            .stat-pill {
                font-size: 11px;
                padding: 4px 8px;
            }
            .team-card {
                padding: 18px;
            }
            .team-card-header h4 {
                font-size: 16px;
            }
            .faq-question {
                padding: 14px 16px;
                font-size: 14px;
            }
            .faq-answer-inner {
                margin-left: 16px;
                padding: 0 14px 14px 14px;
                font-size: 13px;
            }
            .cta-info h3 {
                font-size: 22px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 6px;
            }
        }

        @media (max-width: 520px) {
            .profile-hero h1 {
                font-size: 21px;
            }
            .profile-card-body p {
                font-size: 13px;
            }
            .team-card p {
                font-size: 12px;
            }
            .cta-form-card {
                padding: 16px;
            }
            .cta-form-card input,
            .cta-form-card select,
            .cta-form-card textarea {
                padding: 10px 12px;
                font-size: 13px;
            }
            .cta-submit {
                font-size: 14px;
                padding: 11px 16px;
            }
        }

/* roulang page: category3 */
:root {
            --bg-primary: #0B0F14;
            --bg-secondary: #10151C;
            --bg-card: #1C222A;
            --bg-deep: #0E1319;
            --bg-input: #0F141A;
            --color-primary: #FF5A1F;
            --color-primary-hover: #FF6B35;
            --color-accent: #00E5CC;
            --color-acid: #C8FF00;
            --color-muted: #6B7683;
            --color-text: #EAF0F5;
            --color-text-soft: #A0AAB4;
            --color-border: #2A3138;
            --color-lead: #3D4650;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --shadow-base: 0 8px 24px rgba(0, 0, 0, 0.35);
            --shadow-hover: 0 14px 36px rgba(0, 0, 0, 0.45);
            --font-sans: "Microsoft YaHei", "PingFang SC", "HarmonyOS Sans SC", "Noto Sans CJK SC", sans-serif;
            --font-mono: "Roboto Mono", "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
            --container-max: 1280px;
            --section-gap-desktop: 96px;
            --section-gap-tablet: 72px;
            --section-gap-mobile: 52px;
            --transition-base: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-sans);
            font-size: 15px;
            line-height: 1.75;
            color: var(--color-text);
            background: var(--bg-primary);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
            padding-top: 68px;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: var(--color-accent);
            text-decoration: none;
            transition: color var(--transition-base), background var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
        }

        a:hover {
            color: var(--color-primary);
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible,
        select:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 2px;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        section {
            padding-top: var(--section-gap-desktop);
            padding-bottom: var(--section-gap-desktop);
        }

        h1,
        h2,
        h3,
        h4 {
            color: var(--color-text);
            line-height: 1.3;
            font-weight: 700;
            margin-bottom: 16px;
        }

        h1 {
            font-size: clamp(32px, 5vw, 56px);
            font-weight: 800;
            letter-spacing: 0.01em;
        }

        h2 {
            font-size: clamp(26px, 3.5vw, 36px);
            font-weight: 700;
        }

        h3 {
            font-size: clamp(20px, 2.5vw, 26px);
            font-weight: 600;
        }

        h4 {
            font-size: 16px;
            font-weight: 600;
        }

        p {
            color: var(--color-text-soft);
            margin-bottom: 16px;
            line-height: 1.85;
        }

        /* Header & Navigation */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(11, 15, 20, 0.95);
            backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--color-border);
            transition: box-shadow var(--transition-base);
        }

        .site-header.scrolled {
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
        }

        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 16px;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 22px;
            font-weight: 800;
            color: var(--color-text);
            letter-spacing: 0.02em;
            white-space: nowrap;
        }

        .nav-logo .logo-dot {
            width: 10px;
            height: 10px;
            background: var(--color-primary);
            border-radius: 50%;
            display: inline-block;
            animation: pulse-dot 2s infinite;
        }

        @keyframes pulse-dot {
            0%,
            100% {
                box-shadow: 0 0 0 0 rgba(255, 90, 31, 0.5);
            }
            50% {
                box-shadow: 0 0 0 6px rgba(255, 90, 31, 0);
            }
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 20px;
            list-style: none;
        }

        .nav-menu>li>a {
            color: var(--color-text-soft);
            font-size: 14px;
            font-weight: 500;
            padding: 6px 10px;
            position: relative;
            transition: color var(--transition-base);
            white-space: nowrap;
        }

        .nav-menu>li>a:hover {
            color: var(--color-primary);
        }

        .nav-menu>li>a.active {
            color: var(--color-primary);
            border-left: 2px solid var(--color-primary);
            padding-left: 8px;
        }

        .nav-cta {
            display: inline-flex !important;
            align-items: center;
            gap: 6px;
            background: var(--color-primary);
            color: #101418 !important;
            padding: 10px 18px;
            border-radius: 10px;
            font-weight: 700;
            font-size: 14px;
            transition: background var(--transition-base), transform var(--transition-base);
            white-space: nowrap;
        }

        .nav-cta:hover {
            background: var(--color-primary-hover);
            transform: translateY(-1px);
            color: #101418 !important;
        }

        .nav-cta:active {
            transform: translateY(0);
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: transparent;
            border: none;
            padding: 8px;
            cursor: pointer;
        }

        .nav-toggle span {
            width: 22px;
            height: 2px;
            background: var(--color-text);
            transition: all var(--transition-base);
        }

        .nav-toggle.open span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .nav-toggle.open span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.open span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        /* Progress Steps */
        .progress-steps {
            background: rgba(16, 21, 28, 0.85);
            border-top: 1px solid var(--color-border);
            padding: 8px 0;
        }

        .progress-steps-inner {
            display: flex;
            align-items: center;
            gap: 4px;
            overflow-x: auto;
            scrollbar-width: none;
            -webkit-overflow-scrolling: touch;
            height: 44px;
        }

        .progress-steps-inner::-webkit-scrollbar {
            display: none;
        }

        .step-item {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            flex: 0 0 auto;
            color: var(--color-muted);
            font-size: 13px;
            font-weight: 500;
            padding: 4px 12px;
            border-radius: 20px;
            white-space: nowrap;
            transition: color var(--transition-base), background var(--transition-base);
            position: relative;
        }

        .step-item .step-dot {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 24px;
            height: 24px;
            border-radius: 50%;
            font-size: 11px;
            font-weight: 700;
            font-family: var(--font-mono);
            background: var(--bg-card);
            border: 1px solid var(--color-lead);
            color: var(--color-muted);
            transition: all var(--transition-base);
            flex-shrink: 0;
        }

        .step-item:hover {
            color: var(--color-text);
        }

        .step-item.active {
            color: var(--color-primary);
            background: rgba(255, 90, 31, 0.08);
        }

        .step-item.active .step-dot {
            background: var(--color-primary);
            border-color: var(--color-primary);
            color: #101418;
        }

        .step-item.completed {
            color: var(--color-accent);
        }

        .step-item.completed .step-dot {
            background: transparent;
            border-color: var(--color-accent);
            color: var(--color-accent);
        }

        /* Hero */
        .category-hero {
            position: relative;
            background-image: url('/assets/images/backpic/back-3.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            padding: 100px 0 80px;
            overflow: hidden;
        }

        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(11, 15, 20, 0.72) 0%, rgba(11, 15, 20, 0.88) 60%, var(--bg-primary) 100%);
            z-index: 1;
        }

        .category-hero .container {
            position: relative;
            z-index: 2;
        }

        .category-hero .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(255, 90, 31, 0.12);
            border: 1px solid rgba(255, 90, 31, 0.35);
            color: var(--color-primary);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 14px;
            border-radius: 20px;
            margin-bottom: 20px;
            font-family: var(--font-mono);
            letter-spacing: 0.03em;
        }

        .category-hero .hero-badge .live-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--color-accent);
            animation: pulse-dot 1.8s infinite;
        }

        .category-hero h1 {
            max-width: 800px;
            margin-bottom: 20px;
            color: var(--color-text);
        }

        .category-hero .hero-subtitle {
            font-size: 18px;
            color: var(--color-text-soft);
            max-width: 680px;
            margin-bottom: 28px;
            line-height: 1.75;
        }

        .hero-meta-strip {
            display: flex;
            flex-wrap: wrap;
            gap: 28px;
            margin-top: 32px;
        }

        .hero-meta-strip .meta-item {
            display: flex;
            align-items: center;
            gap: 8px;
            color: var(--color-text-soft);
            font-size: 14px;
        }

        .hero-meta-strip .meta-item i {
            color: var(--color-accent);
            font-size: 16px;
        }

        .hero-meta-strip .meta-item .num {
            font-family: var(--font-mono);
            color: var(--color-text);
            font-weight: 700;
            font-size: 18px;
        }

        /* Section titles */
        .section-header {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 20px;
            margin-bottom: 40px;
            flex-wrap: wrap;
        }

        .section-header .section-tag {
            display: inline-block;
            font-family: var(--font-mono);
            font-size: 12px;
            color: var(--color-accent);
            letter-spacing: 0.08em;
            text-transform: uppercase;
            margin-bottom: 8px;
        }

        .section-header h2 {
            margin-bottom: 6px;
        }

        .section-header .section-sub {
            color: var(--color-muted);
            font-size: 15px;
            max-width: 520px;
        }

        /* Intro description card */
        .intro-desc-card {
            background: var(--bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 32px 36px;
            margin-bottom: 48px;
            position: relative;
            overflow: hidden;
        }

        .intro-desc-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 4px;
            height: 100%;
            background: var(--color-primary);
        }

        .intro-desc-card p {
            color: var(--color-text-soft);
            font-size: 16px;
            line-height: 1.9;
            margin-bottom: 0;
        }

        /* Parameter Compare Cards */
        .param-compare-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-bottom: 48px;
        }

        .param-card {
            background: var(--bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 24px;
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
        }

        .param-card:hover {
            border-color: var(--color-primary);
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }

        .param-card .param-icon {
            width: 44px;
            height: 44px;
            border-radius: var(--radius-sm);
            background: rgba(255, 90, 31, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--color-primary);
            font-size: 20px;
            margin-bottom: 16px;
        }

        .param-card h3 {
            font-size: 18px;
            margin-bottom: 6px;
        }

        .param-card .param-category {
            font-size: 13px;
            color: var(--color-muted);
            font-family: var(--font-mono);
            margin-bottom: 16px;
            letter-spacing: 0.03em;
        }

        .param-card .param-value {
            font-family: var(--font-mono);
            font-size: 40px;
            font-weight: 700;
            color: var(--color-text);
            line-height: 1.2;
            margin-bottom: 4px;
            font-variant-numeric: tabular-nums;
        }

        .param-card .param-unit {
            font-size: 14px;
            color: var(--color-muted);
            font-family: var(--font-mono);
            margin-bottom: 16px;
        }

        .param-card .param-desc {
            font-size: 14px;
            color: var(--color-text-soft);
            line-height: 1.7;
            margin-bottom: 16px;
            flex-grow: 1;
        }

        .param-card .param-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .param-tag {
            display: inline-block;
            font-size: 12px;
            padding: 4px 10px;
            border-radius: 4px;
            font-family: var(--font-mono);
            letter-spacing: 0.02em;
        }

        .param-tag.orange {
            background: rgba(255, 90, 31, 0.12);
            color: var(--color-primary);
            border: 1px solid rgba(255, 90, 31, 0.3);
        }
        .param-tag.cyan {
            background: rgba(0, 229, 204, 0.08);
            color: var(--color-accent);
            border: 1px solid rgba(0, 229, 204, 0.25);
        }
        .param-tag.acid {
            background: rgba(200, 255, 0, 0.08);
            color: var(--color-acid);
            border: 1px solid rgba(200, 255, 0, 0.2);
        }

        /* Spec Bars Section */
        .spec-bars-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 36px;
            margin-bottom: 48px;
        }

        .spec-card {
            background: var(--bg-secondary);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 28px 32px;
        }

        .spec-card h3 {
            font-size: 20px;
            margin-bottom: 4px;
        }

        .spec-card .spec-device {
            color: var(--color-muted);
            font-size: 14px;
            font-family: var(--font-mono);
            margin-bottom: 20px;
        }

        .spec-bar-row {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 12px;
        }

        .spec-bar-row .bar-label {
            flex: 0 0 100px;
            font-size: 13px;
            color: var(--color-text-soft);
            white-space: nowrap;
        }

        .spec-bar-row .bar-track {
            flex: 1;
            height: 8px;
            background: var(--bg-deep);
            border-radius: 4px;
            overflow: hidden;
        }

        .spec-bar-row .bar-fill {
            height: 100%;
            border-radius: 4px;
            background: var(--color-primary);
            transition: width 0.8s cubic-bezier(0.4, 0, 0.2, 1);
        }

        .spec-bar-row .bar-fill.cyan {
            background: var(--color-accent);
        }
        .spec-bar-row .bar-fill.acid {
            background: var(--color-acid);
        }

        .spec-bar-row .bar-value {
            flex: 0 0 56px;
            text-align: right;
            font-family: var(--font-mono);
            font-size: 13px;
            color: var(--color-text);
            font-weight: 600;
            font-variant-numeric: tabular-nums;
        }

        /* Gear Cards */
        .gear-cards-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
            margin-bottom: 48px;
        }

        .gear-card {
            background: var(--bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
        }

        .gear-card:hover {
            border-color: var(--color-accent);
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }

        .gear-card .gear-img {
            position: relative;
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: var(--bg-deep);
        }

        .gear-card .gear-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .gear-card:hover .gear-img img {
            transform: scale(1.04);
        }

        .gear-card .gear-img .img-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 40%, rgba(11, 15, 20, 0.7) 100%);
            pointer-events: none;
        }

        .gear-card .gear-img .gear-badge {
            position: absolute;
            top: 16px;
            left: 16px;
            background: rgba(11, 15, 20, 0.85);
            border: 1px solid var(--color-accent);
            color: var(--color-accent);
            font-size: 12px;
            font-family: var(--font-mono);
            padding: 4px 10px;
            border-radius: 4px;
            letter-spacing: 0.03em;
        }

        .gear-card .gear-body {
            padding: 24px 28px;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
        }

        .gear-card .gear-body h3 {
            font-size: 20px;
            margin-bottom: 4px;
        }

        .gear-card .gear-model {
            font-family: var(--font-mono);
            font-size: 13px;
            color: var(--color-accent);
            margin-bottom: 12px;
        }

        .gear-card .gear-desc {
            font-size: 14px;
            color: var(--color-text-soft);
            line-height: 1.75;
            margin-bottom: 16px;
            flex-grow: 1;
        }

        .gear-card .gear-stats {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            border-top: 1px solid var(--color-border);
            padding-top: 14px;
        }

        .gear-card .gear-stats .stat-item {
            display: flex;
            flex-direction: column;
            gap: 2px;
        }

        .gear-card .gear-stats .stat-label {
            font-size: 12px;
            color: var(--color-muted);
        }

        .gear-card .gear-stats .stat-value {
            font-family: var(--font-mono);
            font-size: 16px;
            font-weight: 700;
            color: var(--color-text);
            font-variant-numeric: tabular-nums;
        }

        /* Deep Content Section */
        .deep-content-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            margin-bottom: 48px;
        }

        .deep-content-block {
            background: var(--bg-secondary);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 32px 36px;
        }

        .deep-content-block h3 {
            font-size: 22px;
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .deep-content-block h3 i {
            color: var(--color-primary);
            font-size: 20px;
        }

        .deep-content-block p {
            color: var(--color-text-soft);
            font-size: 14.5px;
            line-height: 1.9;
            margin-bottom: 12px;
        }

        .deep-content-block p:last-child {
            margin-bottom: 0;
        }

        /* Scene chips */
        .scene-chips {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 16px;
        }

        .scene-chip {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--bg-deep);
            border: 1px solid var(--color-lead);
            color: var(--color-text-soft);
            font-size: 13px;
            padding: 6px 14px;
            border-radius: 20px;
            transition: all var(--transition-base);
        }

        .scene-chip:hover {
            border-color: var(--color-primary);
            color: var(--color-primary);
        }

        /* FAQ */
        .faq-section {
            background: var(--bg-deep);
            border-top: 1px solid var(--color-border);
            border-bottom: 1px solid var(--color-border);
        }

        .faq-list {
            max-width: 820px;
            margin: 0 auto;
        }

        .accordion {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .accordion-item {
            margin-bottom: 12px;
            border: 1px solid var(--color-lead);
            border-radius: var(--radius-sm);
            background: var(--bg-card);
            overflow: hidden;
            transition: border-color var(--transition-base);
        }

        .accordion-item:hover {
            border-color: var(--color-border);
        }

        .accordion-item.is-active {
            border-color: var(--color-accent);
        }

        .accordion-title {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 16px 20px;
            font-size: 15px;
            font-weight: 600;
            color: var(--color-text);
            cursor: pointer;
            position: relative;
            transition: all var(--transition-base);
            border-left: 3px solid var(--color-primary);
        }

        .accordion-item.is-active .accordion-title {
            border-left-color: var(--color-accent);
            color: var(--color-text);
        }

        .accordion-title::after {
            content: '\f078';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            font-size: 12px;
            color: var(--color-primary);
            transition: transform var(--transition-base);
            flex-shrink: 0;
        }

        .accordion-item.is-active .accordion-title::after {
            transform: rotate(180deg);
            color: var(--color-accent);
        }

        .accordion-content {
            display: none;
            padding: 0 20px 18px;
            font-size: 14px;
            color: var(--color-text-soft);
            line-height: 1.85;
            border-left: 3px solid transparent;
        }

        .accordion-item.is-active .accordion-content {
            display: block;
            border-left-color: var(--color-accent);
        }

        /* CTA Section */
        .cta-section {
            background: var(--bg-secondary);
        }

        .cta-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .cta-left h2 {
            font-size: 32px;
            margin-bottom: 12px;
        }

        .cta-left p {
            color: var(--color-text-soft);
            font-size: 15px;
            margin-bottom: 20px;
            max-width: 420px;
        }

        .cta-benefits {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .cta-benefits li {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--bg-card);
            border: 1px solid var(--color-lead);
            color: var(--color-text-soft);
            font-size: 13px;
            padding: 6px 14px;
            border-radius: 20px;
        }

        .cta-benefits li i {
            color: var(--color-accent);
            font-size: 12px;
        }

        .cta-form-card {
            background: var(--bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 32px;
        }

        .cta-form-card label {
            color: var(--color-text);
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 6px;
            display: block;
        }

        .cta-form-card input,
        .cta-form-card select,
        .cta-form-card textarea {
            background: var(--bg-input);
            border: 1px solid var(--color-lead);
            color: var(--color-text);
            border-radius: var(--radius-sm);
            padding: 12px 14px;
            font-size: 14px;
            width: 100%;
            margin-bottom: 16px;
            transition: border-color var(--transition-base), box-shadow var(--transition-base);
            font-family: var(--font-sans);
        }

        .cta-form-card input::placeholder,
        .cta-form-card textarea::placeholder {
            color: var(--color-muted);
        }

        .cta-form-card input:focus,
        .cta-form-card select:focus,
        .cta-form-card textarea:focus {
            border-color: var(--color-primary);
            box-shadow: 0 0 0 3px rgba(255, 90, 31, 0.2);
            outline: none;
        }

        .cta-form-card select {
            appearance: none;
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%236B7683' d='M6 8L0 0h12z'/%3E%3C/svg%3E");
            background-repeat: no-repeat;
            background-position: right 14px center;
            padding-right: 36px;
        }

        .cta-form-card textarea {
            min-height: 90px;
            resize: vertical;
        }

        .form-cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--color-primary);
            color: #101418;
            border: none;
            border-radius: 10px;
            padding: 14px 28px;
            font-size: 15px;
            font-weight: 700;
            cursor: pointer;
            transition: background var(--transition-base), transform var(--transition-base);
            width: 100%;
            justify-content: center;
            font-family: var(--font-sans);
        }

        .form-cta-btn:hover {
            background: var(--color-primary-hover);
            transform: translateY(-1px);
        }

        .form-cta-btn:active {
            transform: translateY(0);
        }

        .form-note {
            font-size: 12px;
            color: var(--color-muted);
            margin-top: 12px;
            margin-bottom: 0;
            text-align: center;
        }

        /* Footer */
        .site-footer {
            background: #0B0E11;
            border-top: 1px solid var(--color-lead);
            padding: 48px 0 24px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 36px;
            margin-bottom: 36px;
        }

        .footer-brand {
            font-size: 20px;
            font-weight: 800;
            color: var(--color-text);
            margin-bottom: 10px;
        }

        .footer-desc {
            font-size: 13px;
            color: var(--color-muted);
            line-height: 1.75;
            margin-bottom: 0;
            max-width: 320px;
        }

        .site-footer h4 {
            font-size: 14px;
            color: var(--color-text);
            margin-bottom: 14px;
            font-weight: 600;
        }

        .site-footer ul {
            list-style: none;
        }

        .site-footer ul li {
            margin-bottom: 8px;
        }

        .site-footer ul a {
            color: var(--color-muted);
            font-size: 13px;
            transition: color var(--transition-base);
        }

        .site-footer ul a:hover {
            color: var(--color-primary);
        }

        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            border-top: 1px solid var(--color-lead);
            padding-top: 20px;
            font-size: 12px;
            color: var(--color-muted);
        }

        .footer-bottom span {
            display: inline-block;
            margin-right: 16px;
        }

        .footer-bottom a {
            color: var(--color-muted);
            font-size: 12px;
        }

        .footer-bottom a:hover {
            color: var(--color-accent);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .container {
                padding-left: 20px;
                padding-right: 20px;
            }
            section {
                padding-top: var(--section-gap-tablet);
                padding-bottom: var(--section-gap-tablet);
            }
            .param-compare-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .spec-bars-grid {
                grid-template-columns: 1fr;
            }
            .deep-content-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .cta-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
        }

        @media (max-width: 640px) {
            body {
                padding-top: 60px;
            }
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            section {
                padding-top: var(--section-gap-mobile);
                padding-bottom: var(--section-gap-mobile);
            }
            .nav-wrapper {
                height: 60px;
            }
            .nav-toggle {
                display: flex;
            }
            .nav-menu {
                display: none;
                position: absolute;
                top: 60px;
                left: 0;
                right: 0;
                background: rgba(11, 15, 20, 0.98);
                flex-direction: column;
                gap: 0;
                padding: 16px 20px;
                border-bottom: 1px solid var(--color-border);
                box-shadow: 0 16px 32px rgba(0, 0, 0, 0.5);
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-menu>li {
                width: 100%;
            }
            .nav-menu>li>a {
                display: block;
                padding: 12px 10px;
                border-bottom: 1px solid var(--color-border);
                font-size: 15px;
            }
            .nav-menu>li>a.active {
                border-left: none;
                border-bottom: 1px solid var(--color-primary);
                padding-left: 10px;
            }
            .nav-menu .nav-cta {
                display: flex !important;
                justify-content: center;
                margin-top: 12px;
                width: 100%;
            }
            .progress-steps {
                padding: 4px 0;
            }
            .progress-steps-inner {
                height: 40px;
                gap: 2px;
            }
            .step-item {
                font-size: 12px;
                padding: 2px 10px;
            }
            .step-item .step-dot {
                width: 20px;
                height: 20px;
                font-size: 10px;
            }
            .category-hero {
                padding: 64px 0 52px;
            }
            .category-hero h1 {
                font-size: 28px;
            }
            .category-hero .hero-subtitle {
                font-size: 15px;
            }
            .hero-meta-strip {
                gap: 16px;
                flex-wrap: wrap;
            }
            .section-header {
                flex-direction: column;
                align-items: flex-start;
                margin-bottom: 24px;
            }
            .intro-desc-card {
                padding: 20px 22px;
                margin-bottom: 32px;
            }
            .intro-desc-card p {
                font-size: 14px;
            }
            .param-compare-grid {
                grid-template-columns: 1fr;
                gap: 16px;
                margin-bottom: 32px;
            }
            .param-card {
                padding: 20px;
            }
            .param-card .param-value {
                font-size: 32px;
            }
            .spec-bars-grid {
                grid-template-columns: 1fr;
                gap: 20px;
                margin-bottom: 32px;
            }
            .spec-card {
                padding: 20px;
            }
            .spec-bar-row {
                flex-wrap: wrap;
                gap: 6px;
            }
            .spec-bar-row .bar-label {
                flex-basis: 80px;
            }
            .spec-bar-row .bar-value {
                flex-basis: 48px;
            }
            .gear-cards-grid {
                grid-template-columns: 1fr;
                gap: 20px;
                margin-bottom: 32px;
            }
            .gear-card .gear-body {
                padding: 18px 20px;
            }
            .deep-content-grid {
                grid-template-columns: 1fr;
                gap: 20px;
                margin-bottom: 32px;
            }
            .deep-content-block {
                padding: 22px 20px;
            }
            .cta-form-card {
                padding: 22px 20px;
            }
            .cta-left h2 {
                font-size: 26px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
            .footer-bottom span {
                margin-right: 0;
                display: block;
            }
        }

        /* Utility */
        .text-accent {
            color: var(--color-accent);
        }
        .text-primary {
            color: var(--color-primary);
        }
        .font-mono {
            font-family: var(--font-mono);
        }
        .num-tabular {
            font-variant-numeric: tabular-nums;
        }