/* roulang page: index */
:root {
            --c-primary: #0E2E24;
            --c-primary-deep: #0D1E1A;
            --c-secondary: #C9A24B;
            --c-accent: #E6C77A;
            --c-bg: #F7F5F0;
            --c-card: #FFFFFF;
            --c-text: #1B1F1D;
            --c-muted: #6A726E;
            --c-border: rgba(14, 46, 36, 0.08);
            --c-success: #2D7A4F;
            --c-warning: #A65D2A;
            --c-danger: #B5483D;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 12px rgba(14, 30, 26, 0.05);
            --shadow-md: 0 6px 24px rgba(14, 30, 26, 0.06);
            --shadow-lg: 0 12px 32px rgba(14, 30, 26, 0.12);
            --shadow-glow: 0 8px 28px rgba(201, 162, 75, 0.22);
            --font-base: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            --font-num: "DIN Alternate", "Roboto", monospace;
            --container: 1200px;
            --header-h: 68px;
            --section-pad: 72px;
            --transition: 0.24s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        }

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

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

        body {
            font-family: var(--font-base);
            font-size: 16px;
            line-height: 1.8;
            color: var(--c-text);
            background-color: var(--c-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        img { max-width: 100%; height: auto; display: block; }
        a { text-decoration: none; color: inherit; transition: color var(--transition); }
        ul, ol { list-style: none; }
        button, input, select, textarea { font-family: inherit; font-size: inherit; outline: none; border: none; }

        .container {
            width: 100%;
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 20px;
        }

        .section { padding: var(--section-pad) 0; }
        .section-tight { padding: 48px 0; }
        .section-dark { background-color: var(--c-primary); color: #fff; }
        .section-soft { background-color: #F1EDE4; }
        .section-white { background-color: #fff; }

        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.06em;
            color: var(--c-secondary);
            text-transform: uppercase;
            margin-bottom: 10px;
        }
        .section-header h2 {
            font-size: 30px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--c-text);
        }
        .section-header p {
            font-size: 15px;
            color: var(--c-muted);
            margin-top: 12px;
            max-width: 620px;
            margin-left: auto;
            margin-right: auto;
        }
        .section-dark .section-header h2 { color: #fff; }
        .section-dark .section-header p { color: rgba(255, 255, 255, 0.7); }
        .section-dark .section-header .section-tag { color: var(--c-accent); }

        /* ========== Header / Nav ========== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--header-h);
            z-index: 1000;
            background: rgba(247, 245, 240, 0.96);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid transparent;
            transition: box-shadow var(--transition), border-color var(--transition), background var(--transition);
        }
        .site-header.scrolled {
            box-shadow: 0 4px 24px rgba(14, 30, 26, 0.12);
            border-bottom-color: var(--c-border);
            background: rgba(255, 255, 255, 0.98);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            gap: 24px;
        }
        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .brand-icon {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--c-secondary), var(--c-accent));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 18px;
            color: var(--c-primary);
            flex-shrink: 0;
        }
        .brand-text {
            font-size: 17px;
            font-weight: 700;
            color: var(--c-primary);
            letter-spacing: 0.02em;
            white-space: nowrap;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .main-nav a {
            display: block;
            padding: 8px 14px;
            font-size: 15px;
            font-weight: 500;
            color: var(--c-text);
            border-radius: var(--radius-sm);
            position: relative;
            transition: color var(--transition), background var(--transition);
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            left: 14px;
            right: 14px;
            bottom: 2px;
            height: 2px;
            background: var(--c-secondary);
            border-radius: 2px;
            transform: scaleX(0);
            transform-origin: left;
            transition: transform var(--transition);
        }
        .main-nav a:hover {
            color: var(--c-primary);
            background: rgba(14, 46, 36, 0.04);
        }
        .main-nav a:hover::after { transform: scaleX(1); }
        .main-nav a.active {
            color: var(--c-secondary);
            font-weight: 700;
        }
        .main-nav a.active::after { transform: scaleX(1); }

        .header-cta {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 600;
            line-height: 1.2;
            cursor: pointer;
            transition: all var(--transition);
            border: 1px solid transparent;
            text-align: center;
            white-space: nowrap;
            position: relative;
        }
        .btn:focus-visible {
            outline: 2px solid var(--c-accent);
            outline-offset: 2px;
        }
        .btn-primary {
            background: var(--c-secondary);
            color: var(--c-primary);
            border-color: var(--c-secondary);
        }
        .btn-primary:hover {
            background: var(--c-accent);
            border-color: var(--c-accent);
            box-shadow: var(--shadow-glow);
            transform: translateY(-1px);
        }
        .btn-primary:active { transform: translateY(0); box-shadow: none; }
        .btn-outline {
            background: transparent;
            color: var(--c-primary);
            border-color: var(--c-primary);
        }
        .btn-outline:hover {
            background: rgba(14, 46, 36, 0.06);
            box-shadow: var(--shadow-sm);
            transform: translateY(-1px);
        }
        .btn-outline.on-dark {
            color: #fff;
            border-color: rgba(255, 255, 255, 0.5);
        }
        .btn-outline.on-dark:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: #fff;
        }
        .btn-lg { padding: 14px 32px; font-size: 16px; border-radius: 12px; }
        .btn-sm { padding: 9px 18px; font-size: 13px; border-radius: 8px; }
        .btn-block { width: 100%; }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: transparent;
            border: none;
            cursor: pointer;
            padding: 8px;
            border-radius: 6px;
            transition: background var(--transition);
        }
        .nav-toggle:hover { background: rgba(14, 46, 36, 0.06); }
        .nav-toggle .bar {
            width: 24px;
            height: 2px;
            background: var(--c-primary);
            border-radius: 2px;
            transition: all var(--transition);
        }
        .nav-toggle.active .bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
        .nav-toggle.active .bar:nth-child(2) { opacity: 0; }
        .nav-toggle.active .bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

        .nav-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(14, 30, 26, 0.55);
            z-index: 998;
            opacity: 0;
            transition: opacity var(--transition);
        }
        .nav-overlay.active { opacity: 1; }

        /* ========== Hero ========== */
        .hero {
            padding-top: calc(var(--header-h) + 56px);
            padding-bottom: 64px;
            background: var(--c-primary);
            color: #fff;
            position: relative;
            overflow: hidden;
            min-height: 520px;
            display: flex;
            align-items: center;
        }
        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-image:
                linear-gradient(rgba(230, 199, 122, 0.08) 1px, transparent 1px),
                linear-gradient(90deg, rgba(230, 199, 122, 0.08) 1px, transparent 1px);
            background-size: 48px 48px;
            pointer-events: none;
        }
        .hero::after {
            content: '';
            position: absolute;
            top: -120px;
            right: -120px;
            width: 420px;
            height: 420px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(201, 162, 75, 0.15) 0%, transparent 70%);
            pointer-events: none;
        }
        .hero .container {
            position: relative;
            z-index: 2;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 48px;
        }
        .hero-content {
            flex: 1;
            max-width: 560px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 600;
            color: var(--c-accent);
            background: rgba(230, 199, 122, 0.12);
            border: 1px solid rgba(230, 199, 122, 0.28);
            padding: 6px 14px;
            border-radius: 20px;
            margin-bottom: 20px;
            letter-spacing: 0.04em;
        }
        .hero-content h1 {
            font-size: 38px;
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 18px;
            letter-spacing: 0.01em;
        }
        .hero-content .hero-sub {
            font-size: 18px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.82);
            margin-bottom: 30px;
            max-width: 430px;
        }
        .hero-actions {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-wrap: wrap;
        }
        .hero-visual {
            flex-shrink: 0;
            width: 340px;
            position: relative;
        }
        .hero-phone {
            position: relative;
            width: 300px;
            height: 560px;
            margin: 0 auto;
            border-radius: 36px;
            border: 3px solid rgba(230, 199, 122, 0.4);
            background: var(--c-primary-deep);
            overflow: hidden;
            box-shadow: 0 24px 64px rgba(0, 0, 0, 0.45), 0 0 0 1px rgba(230, 199, 122, 0.18) inset;
        }
        .hero-phone img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            opacity: 0.92;
        }
        .hero-phone::after {
            content: '';
            position: absolute;
            top: 14px;
            left: 50%;
            transform: translateX(-50%);
            width: 90px;
            height: 6px;
            border-radius: 3px;
            background: rgba(255, 255, 255, 0.25);
        }

        /* ========== Official Notice Bar ========== */
        .notice-bar {
            background: linear-gradient(135deg, var(--c-secondary), var(--c-accent));
            color: var(--c-primary);
            padding: 14px 0;
        }
        .notice-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
        }
        .notice-left {
            display: flex;
            align-items: center;
            gap: 12px;
            font-weight: 600;
            font-size: 14px;
        }
        .notice-icon {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(14, 46, 36, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }
        .notice-icon svg {
            width: 20px;
            height: 20px;
            fill: none;
            stroke: var(--c-primary);
            stroke-width: 2;
        }
        .notice-link {
            font-weight: 700;
            font-size: 14px;
            color: var(--c-primary);
            text-decoration: underline;
            text-underline-offset: 4px;
            white-space: nowrap;
            transition: color var(--transition);
        }
        .notice-link:hover { color: #1a5c4a; }

        /* ========== Download Grid ========== */
        .download-grid {
            display: grid;
            grid-template-columns: 1.3fr 1fr;
            grid-template-areas:
                "android ios"
                "android apk";
            gap: 24px;
        }
        .download-card {
            background: var(--c-card);
            border: 1px solid var(--c-border);
            border-radius: var(--radius-md);
            padding: 32px 28px;
            box-shadow: var(--shadow-md);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
            position: relative;
            overflow: hidden;
        }
        .download-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-2px);
            border-color: rgba(201, 162, 75, 0.3);
        }
        .download-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            border-radius: 3px 3px 0 0;
        }
        .download-card.android::before { background: var(--c-secondary); }
        .download-card.ios::before { background: var(--c-primary); }
        .download-card.apk::before { background: var(--c-accent); }
        .download-card.wide { grid-area: android; }
        .download-card.ios { grid-area: ios; }
        .download-card.apk { grid-area: apk; }

        .dc-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: rgba(14, 46, 36, 0.05);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            margin-bottom: 16px;
        }
        .dc-title {
            font-size: 20px;
            font-weight: 700;
            color: var(--c-text);
            margin-bottom: 8px;
        }
        .dc-info {
            font-size: 14px;
            color: var(--c-muted);
            margin-bottom: 6px;
        }
        .dc-info span {
            display: inline-block;
            font-weight: 600;
            color: var(--c-text);
        }
        .dc-btn {
            margin-top: auto;
            padding-top: 18px;
        }

        /* ========== News List ========== */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .news-card {
            background: var(--c-card);
            border: 1px solid var(--c-border);
            border-radius: var(--radius-md);
            padding: 24px 20px;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }
        .news-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
            border-color: rgba(201, 162, 75, 0.25);
        }
        .news-meta {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 10px;
            flex-wrap: wrap;
        }
        .news-tag {
            font-size: 12px;
            font-weight: 600;
            color: var(--c-secondary);
            background: rgba(201, 162, 75, 0.1);
            padding: 3px 10px;
            border-radius: 12px;
            letter-spacing: 0.03em;
        }
        .news-date {
            font-size: 12px;
            color: var(--c-muted);
        }
        .news-title {
            font-size: 17px;
            font-weight: 700;
            line-height: 1.45;
            color: var(--c-text);
            margin-bottom: 10px;
        }
        .news-excerpt {
            font-size: 14px;
            color: var(--c-muted);
            line-height: 1.7;
            margin-bottom: 14px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-link {
            margin-top: auto;
            font-size: 14px;
            font-weight: 600;
            color: var(--c-secondary);
            transition: color var(--transition);
        }
        .news-link:hover { color: var(--c-primary); }
        .empty-state {
            text-align: center;
            padding: 40px 20px;
            background: #F1EDE4;
            border-radius: var(--radius-md);
            border: 1px dashed rgba(14, 46, 36, 0.15);
            grid-column: 1 / -1;
        }
        .empty-icon {
            font-size: 36px;
            margin-bottom: 12px;
            opacity: 0.5;
        }
        .empty-state p {
            font-size: 14px;
            color: var(--c-muted);
        }

        /* ========== Steps ========== */
        .steps-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            position: relative;
        }
        .steps-row::before {
            content: '';
            position: absolute;
            top: 28px;
            left: 8%;
            right: 8%;
            height: 2px;
            background: rgba(201, 162, 75, 0.25);
            z-index: 0;
        }
        .step-item {
            text-align: center;
            position: relative;
            z-index: 1;
        }
        .step-num {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--c-card);
            border: 2px solid var(--c-secondary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            font-weight: 700;
            color: var(--c-secondary);
            margin: 0 auto 16px;
            font-family: var(--font-num);
            transition: all var(--transition);
        }
        .step-item:hover .step-num {
            background: var(--c-secondary);
            color: #fff;
            box-shadow: var(--shadow-glow);
        }
        .step-title {
            font-size: 17px;
            font-weight: 700;
            color: var(--c-text);
            margin-bottom: 8px;
        }
        .step-desc {
            font-size: 13px;
            color: var(--c-muted);
            line-height: 1.6;
        }

        /* ========== Feature Grid ========== */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .feature-item {
            background: var(--c-card);
            border: 1px solid var(--c-border);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            transition: all var(--transition);
            position: relative;
        }
        .feature-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
            border-color: rgba(201, 162, 75, 0.3);
        }
        .feature-icon {
            width: 44px;
            height: 44px;
            border-radius: 10px;
            background: rgba(201, 162, 75, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            margin-bottom: 14px;
        }
        .feature-item h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--c-text);
            margin-bottom: 8px;
        }
        .feature-item p {
            font-size: 14px;
            color: var(--c-muted);
            line-height: 1.7;
        }

        /* ========== Security Split ========== */
        .security-split {
            display: flex;
            align-items: center;
            gap: 48px;
        }
        .security-content {
            flex: 1;
        }
        .security-content h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--c-text);
            margin-bottom: 16px;
        }
        .security-content .lead {
            font-size: 16px;
            color: var(--c-muted);
            margin-bottom: 24px;
            line-height: 1.7;
        }
        .security-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .security-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 15px;
            color: var(--c-text);
            line-height: 1.6;
        }
        .security-list .check {
            flex-shrink: 0;
            width: 22px;
            height: 22px;
            border-radius: 50%;
            background: var(--c-success);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 12px;
            color: #fff;
            margin-top: 4px;
        }
        .security-visual {
            flex-shrink: 0;
            width: 380px;
        }
        .security-visual img {
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-md);
        }

        /* ========== Spec Grid ========== */
        .spec-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .spec-card {
            background: var(--c-card);
            border: 1px solid var(--c-border);
            border-radius: var(--radius-md);
            padding: 24px 20px;
            box-shadow: var(--shadow-sm);
            text-align: center;
            transition: all var(--transition);
        }
        .spec-card:hover {
            box-shadow: var(--shadow-md);
            border-color: rgba(201, 162, 75, 0.28);
        }
        .spec-label {
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.05em;
            color: var(--c-muted);
            text-transform: uppercase;
            margin-bottom: 8px;
        }
        .spec-value {
            font-size: 18px;
            font-weight: 700;
            color: var(--c-primary);
            font-family: var(--font-num);
        }
        .spec-note {
            font-size: 12px;
            color: var(--c-muted);
            margin-top: 6px;
        }

        /* ========== Guide Cards ========== */
        .guide-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .guide-card {
            background: var(--c-card);
            border: 1px solid var(--c-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }
        .guide-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-2px);
        }
        .guide-card img {
            width: 100%;
            height: 180px;
            object-fit: cover;
        }
        .guide-body {
            padding: 20px 22px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .guide-body h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--c-text);
            margin-bottom: 8px;
        }
        .guide-body p {
            font-size: 14px;
            color: var(--c-muted);
            margin-bottom: 14px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .guide-link {
            margin-top: auto;
            font-size: 14px;
            font-weight: 600;
            color: var(--c-secondary);
        }
        .guide-link:hover { color: var(--c-primary); }

        /* ========== Trade Banner ========== */
        .trade-banner {
            background: var(--c-primary-deep);
            border-radius: var(--radius-lg);
            padding: 48px 40px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 40px;
            position: relative;
            overflow: hidden;
        }
        .trade-banner::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -40px;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(230, 199, 122, 0.12) 0%, transparent 70%);
        }
        .trade-left {
            position: relative;
            z-index: 1;
            flex: 1;
        }
        .trade-left h2 {
            font-size: 28px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
        }
        .trade-stats {
            display: flex;
            gap: 36px;
            flex-wrap: wrap;
        }
        .trade-stat .num {
            font-size: 32px;
            font-weight: 700;
            color: var(--c-accent);
            font-family: var(--font-num);
            line-height: 1.2;
        }
        .trade-stat .label {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.7);
            margin-top: 4px;
        }
        .trade-right {
            position: relative;
            z-index: 1;
            flex-shrink: 0;
        }

        /* ========== Review Cards ========== */
        .review-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .review-card {
            background: var(--c-card);
            border: 1px solid var(--c-border);
            border-radius: var(--radius-md);
            padding: 24px 22px;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
        }
        .review-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .review-stars {
            color: var(--c-secondary);
            font-size: 15px;
            letter-spacing: 2px;
            margin-bottom: 10px;
        }
        .review-text {
            font-size: 14px;
            color: var(--c-text);
            line-height: 1.7;
            margin-bottom: 14px;
        }
        .review-user {
            font-size: 13px;
            color: var(--c-muted);
            font-weight: 500;
        }
        .review-user span {
            display: block;
            font-weight: 600;
            color: var(--c-text);
            font-size: 14px;
        }

        /* ========== FAQ ========== */
        .faq-group {
            max-width: 820px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--c-card);
            border: 1px solid var(--c-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(201, 162, 75, 0.3);
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 22px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--c-text);
            background: transparent;
            border: none;
            width: 100%;
            text-align: left;
            transition: background var(--transition);
        }
        .faq-question:hover { background: rgba(14, 46, 36, 0.03); }
        .faq-toggle {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(201, 162, 75, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            font-weight: 400;
            color: var(--c-secondary);
            transition: transform var(--transition);
        }
        .faq-item.open .faq-toggle { transform: rotate(180deg); }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            padding: 0 22px;
            font-size: 14px;
            color: var(--c-muted);
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 240px;
            padding-bottom: 18px;
        }

        /* ========== CTA Banner ========== */
        .cta-banner {
            background: linear-gradient(135deg, var(--c-secondary) 0%, var(--c-accent) 100%);
            border-radius: var(--radius-lg);
            padding: 52px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-banner::before {
            content: '';
            position: absolute;
            top: -80px;
            left: -60px;
            width: 240px;
            height: 240px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.12);
        }
        .cta-banner::after {
            content: '';
            position: absolute;
            bottom: -60px;
            right: -60px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: rgba(14, 46, 36, 0.1);
        }
        .cta-banner h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--c-primary);
            margin-bottom: 12px;
            position: relative;
            z-index: 1;
        }
        .cta-banner p {
            font-size: 15px;
            color: rgba(14, 46, 36, 0.75);
            margin-bottom: 26px;
            position: relative;
            z-index: 1;
        }
        .cta-actions {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 14px;
            flex-wrap: wrap;
            position: relative;
            z-index: 1;
        }
        .cta-banner .btn-primary {
            background: var(--c-primary);
            color: #fff;
            border-color: var(--c-primary);
        }
        .cta-banner .btn-primary:hover {
            background: var(--c-primary-deep);
            border-color: var(--c-primary-deep);
            box-shadow: 0 10px 28px rgba(14, 46, 36, 0.25);
        }

        /* ========== Help Cards ========== */
        .help-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .help-card {
            background: var(--c-card);
            border: 1px solid var(--c-border);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            text-align: center;
        }
        .help-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
            border-color: rgba(201, 162, 75, 0.3);
        }
        .help-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: rgba(14, 46, 36, 0.05);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 26px;
            margin: 0 auto 16px;
        }
        .help-card h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--c-text);
            margin-bottom: 10px;
        }
        .help-card p {
            font-size: 14px;
            color: var(--c-muted);
            line-height: 1.7;
            margin-bottom: 14px;
        }
        .help-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--c-secondary);
        }
        .help-link:hover { color: var(--c-primary); }

        /* ========== Footer ========== */
        .site-footer {
            background: var(--c-primary-deep);
            color: rgba(255, 255, 255, 0.8);
            padding: 56px 0 24px;
            margin-top: 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2.2fr 1.2fr 1.4fr 1.6fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .brand-text {
            color: #fff;
            font-size: 18px;
        }
        .footer-brand p {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.6);
            margin-top: 12px;
            line-height: 1.7;
            max-width: 280px;
        }
        .footer-col h4 {
            font-size: 14px;
            font-weight: 700;
            color: var(--c-accent);
            margin-bottom: 16px;
            letter-spacing: 0.04em;
        }
        .footer-col a,
        .footer-col span {
            display: block;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 10px;
            line-height: 1.6;
            transition: color var(--transition);
        }
        .footer-col a:hover { color: var(--c-accent); }
        .footer-bottom {
            border-top: 1px solid rgba(230, 199, 122, 0.15);
            padding-top: 20px;
            text-align: center;
            font-size: 12px;
            color: rgba(255, 255, 255, 0.45);
        }

        /* ========== Responsive ========== */
        @media (max-width: 1024px) {
            :root { --section-pad: 52px; }
            .hero .container { flex-direction: column; gap: 36px; text-align: center; }
            .hero-content { max-width: 100%; }
            .hero-actions { justify-content: center; }
            .hero-sub { margin-left: auto; margin-right: auto; }
            .hero-visual { width: 260px; }
            .hero-phone { width: 220px; height: 420px; border-radius: 26px; }
            .news-grid { grid-template-columns: repeat(2, 1fr); }
            .feature-grid { grid-template-columns: repeat(2, 1fr); }
            .spec-grid { grid-template-columns: repeat(2, 1fr); }
            .guide-grid { grid-template-columns: repeat(2, 1fr); }
            .review-grid { grid-template-columns: repeat(2, 1fr); }
            .help-grid { grid-template-columns: repeat(2, 1fr); }
            .security-split { flex-direction: column; gap: 32px; }
            .security-visual { width: 100%; max-width: 420px; margin: 0 auto; }
            .trade-banner { flex-direction: column; text-align: center; gap: 28px; }
            .trade-stats { justify-content: center; }
            .footer-grid { grid-template-columns: repeat(2, 1fr); gap: 28px; }
            .steps-row { gap: 16px; }
            .steps-row::before { left: 5%; right: 5%; }
        }

        @media (max-width: 768px) {
            :root { --section-pad: 40px; --header-h: 60px; }
            .main-nav {
                position: fixed;
                top: var(--header-h);
                right: -300px;
                width: 280px;
                height: calc(100vh - var(--header-h));
                background: #fff;
                flex-direction: column;
                align-items: flex-start;
                padding: 24px 20px;
                gap: 4px;
                box-shadow: -12px 0 32px rgba(14, 30, 26, 0.15);
                transition: right 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
                z-index: 999;
            }
            .main-nav.open { right: 0; }
            .main-nav a {
                width: 100%;
                padding: 14px 16px;
                font-size: 16px;
                border-radius: 8px;
            }
            .main-nav a::after { display: none; }
            .nav-toggle { display: flex; }
            .nav-overlay { display: block; pointer-events: none; }
            .nav-overlay.active { pointer-events: auto; }
            .header-cta .btn { padding: 10px 16px; font-size: 13px; }
            .hero { min-height: auto; padding-top: calc(var(--header-h) + 36px); padding-bottom: 44px; }
            .hero-content h1 { font-size: 28px; }
            .hero-content .hero-sub { font-size: 15px; }
            .hero-visual { width: 200px; }
            .hero-phone { width: 170px; height: 340px; border-radius: 22px; }
            .download-grid {
                grid-template-columns: 1fr;
                grid-template-areas:
                    "android"
                    "ios"
                    "apk";
            }
            .news-grid { grid-template-columns: 1fr; }
            .feature-grid { grid-template-columns: 1fr; }
            .spec-grid { grid-template-columns: 1fr 1fr; }
            .guide-grid { grid-template-columns: 1fr; }
            .review-grid { grid-template-columns: 1fr; }
            .help-grid { grid-template-columns: 1fr; }
            .steps-row {
                display: flex;
                overflow-x: auto;
                gap: 16px;
                padding-bottom: 8px;
                scroll-snap-type: x mandatory;
                -webkit-overflow-scrolling: touch;
            }
            .steps-row::before { display: none; }
            .step-item {
                flex-shrink: 0;
                width: 180px;
                scroll-snap-align: start;
            }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; text-align: center; }
            .footer-brand p { margin-left: auto; margin-right: auto; }
            .notice-inner { justify-content: center; text-align: center; }
            .section-header h2 { font-size: 24px; }
            .trade-banner { padding: 32px 22px; }
            .trade-left h2 { font-size: 23px; }
            .trade-stat .num { font-size: 26px; }
            .cta-banner { padding: 36px 22px; }
            .cta-banner h2 { font-size: 23px; }
            .faq-question { font-size: 14px; padding: 15px 16px; }
            .faq-answer { padding: 0 16px; }
            .faq-item.open .faq-answer { padding-bottom: 15px; }
        }

        @media (max-width: 520px) {
            .hero-content h1 { font-size: 24px; }
            .hero-actions { flex-direction: column; width: 100%; }
            .hero-actions .btn { width: 100%; }
            .spec-grid { grid-template-columns: 1fr; }
            .trade-stats { gap: 20px; }
            .trade-stat .num { font-size: 22px; }
            .header-cta .btn { padding: 8px 12px; font-size: 12px; }
            .brand-text { font-size: 14px; }
        }

/* roulang page: article */
:root {
            --c-primary: #0E2E24;
            --c-primary-deep: #0D1E1A;
            --c-secondary: #C9A24B;
            --c-accent: #E6C77A;
            --c-bg: #F7F5F0;
            --c-card: #FFFFFF;
            --c-text: #1B1F1D;
            --c-muted: #6A726E;
            --c-border: rgba(14, 46, 36, 0.08);
            --c-success: #2D7A4F;
            --c-warning: #A65D2A;
            --c-danger: #B5483D;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 12px rgba(14, 30, 26, 0.05);
            --shadow-md: 0 6px 24px rgba(14, 30, 26, 0.06);
            --shadow-lg: 0 12px 32px rgba(14, 30, 26, 0.12);
            --shadow-glow: 0 8px 28px rgba(201, 162, 75, 0.22);
            --font-base: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            --font-num: "DIN Alternate", "Roboto", monospace;
            --container: 1200px;
            --header-h: 68px;
            --section-pad: 72px;
            --transition: 0.24s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
        body {
            font-family: var(--font-base);
            font-size: 16px;
            line-height: 1.8;
            color: var(--c-text);
            background-color: var(--c-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { text-decoration: none; color: inherit; transition: color var(--transition); }
        button, input, select, textarea { font-family: inherit; font-size: inherit; outline: none; border: none; }
        .container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 20px; }
        .section { padding: var(--section-pad) 0; }
        .section-tight { padding: 48px 0; }
        .section-soft { background-color: #F1EDE4; }
        .section-white { background-color: #fff; }
        .section-dark { background-color: var(--c-primary); color: #fff; }
        .section-header { text-align: center; margin-bottom: 48px; }
        .section-header .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.06em;
            color: var(--c-secondary);
            text-transform: uppercase;
            margin-bottom: 10px;
        }
        .section-header h2 { font-size: 30px; font-weight: 700; line-height: 1.3; color: var(--c-text); }
        .section-header p { font-size: 15px; color: var(--c-muted); margin-top: 12px; max-width: 620px; margin-left: auto; margin-right: auto; }
        .section-dark .section-header h2 { color: #fff; }
        .section-dark .section-header p { color: rgba(255, 255, 255, 0.7); }
        .section-dark .section-header .section-tag { color: var(--c-accent); }

        /* Header */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--header-h);
            z-index: 1000;
            background: rgba(247, 245, 240, 0.96);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid transparent;
            transition: box-shadow var(--transition), border-color var(--transition), background var(--transition);
        }
        .site-header.scrolled {
            box-shadow: 0 4px 24px rgba(14, 30, 26, 0.12);
            border-bottom-color: var(--c-border);
            background: rgba(255, 255, 255, 0.98);
        }
        .header-inner { display: flex; align-items: center; justify-content: space-between; height: 100%; gap: 24px; }
        .brand { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
        .brand-icon {
            width: 38px; height: 38px; border-radius: 10px;
            background: linear-gradient(135deg, var(--c-secondary), var(--c-accent));
            display: flex; align-items: center; justify-content: center;
            font-weight: 700; font-size: 18px; color: var(--c-primary); flex-shrink: 0;
        }
        .brand-text { font-size: 17px; font-weight: 700; color: var(--c-primary); letter-spacing: 0.02em; white-space: nowrap; }
        .main-nav { display: flex; align-items: center; gap: 8px; }
        .main-nav a {
            display: block; padding: 8px 14px; font-size: 15px; font-weight: 500;
            color: var(--c-text); border-radius: var(--radius-sm); position: relative;
            transition: color var(--transition), background var(--transition);
        }
        .main-nav a::after {
            content: ''; position: absolute; left: 14px; right: 14px; bottom: 2px; height: 2px;
            background: var(--c-secondary); border-radius: 2px;
            transform: scaleX(0); transform-origin: left; transition: transform var(--transition);
        }
        .main-nav a:hover { color: var(--c-primary); background: rgba(14, 46, 36, 0.04); }
        .main-nav a:hover::after { transform: scaleX(1); }
        .main-nav a.active { color: var(--c-secondary); font-weight: 700; }
        .main-nav a.active::after { transform: scaleX(1); }
        .header-cta { display: flex; align-items: center; gap: 12px; }
        .nav-toggle { display: none; flex-direction: column; justify-content: center; gap: 5px; width: 40px; height: 40px; background: rgba(14, 46, 36, 0.06); border-radius: 8px; cursor: pointer; }
        .nav-toggle .bar { display: block; width: 22px; height: 2px; background: var(--c-primary); border-radius: 2px; transition: transform var(--transition), opacity var(--transition); }
        .nav-toggle[aria-expanded="true"] .bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
        .nav-toggle[aria-expanded="true"] .bar:nth-child(2) { opacity: 0; }
        .nav-toggle[aria-expanded="true"] .bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
        .nav-overlay { position: fixed; inset: 0; background: rgba(14, 30, 26, 0.55); z-index: 990; opacity: 0; visibility: hidden; transition: opacity var(--transition), visibility var(--transition); }
        body.nav-open .nav-overlay { opacity: 1; visibility: visible; }
        body.nav-open .main-nav { transform: translateX(0); visibility: visible; }
        @media (max-width: 1023px) {
            .main-nav {
                position: fixed; top: var(--header-h); right: 0; bottom: 0; width: min(320px, 82vw);
                background: #fff; flex-direction: column; align-items: flex-start; gap: 4px;
                padding: 24px 20px; box-shadow: -12px 0 32px rgba(14, 30, 26, 0.12);
                transform: translateX(100%); visibility: hidden; transition: transform var(--transition), visibility var(--transition);
            }
            .main-nav a { width: 100%; padding: 12px 14px; }
            .nav-toggle { display: flex; }
        }

        /* Buttons */
        .btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 12px 24px; border-radius: 10px; font-weight: 600; font-size: 15px; line-height: 1.2; cursor: pointer; transition: background var(--transition), color var(--transition), box-shadow var(--transition), transform var(--transition); }
        .btn:focus-visible { outline: 2px solid var(--c-accent); outline-offset: 2px; }
        .btn-primary { background: var(--c-secondary); color: var(--c-primary); }
        .btn-primary:hover { background: var(--c-accent); color: var(--c-primary); transform: translateY(-2px); box-shadow: var(--shadow-glow); }
        .btn-primary:active { transform: translateY(0); }
        .btn-outline { background: transparent; color: var(--c-primary); border: 1px solid var(--c-primary); }
        .btn-outline:hover { background: var(--c-primary); color: #fff; }
        .btn-sm { padding: 9px 18px; font-size: 14px; }
        .btn-lg { padding: 14px 28px; font-size: 16px; }
        .btn-block { display: flex; width: 100%; }

        /* Breadcrumb */
        .breadcrumb { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; font-size: 14px; color: var(--c-muted); margin-bottom: 20px; }
        .breadcrumb a { color: var(--c-muted); }
        .breadcrumb a:hover { color: var(--c-primary); }
        .breadcrumb span { color: var(--c-primary); font-weight: 600; }

        /* Article Head */
        .article-head-section { padding: calc(var(--header-h) + 48px) 0 40px; background: #fff; border-bottom: 1px solid var(--c-border); }
        .article-head-card .article-meta { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; margin-bottom: 16px; }
        .badge { display: inline-block; padding: 4px 12px; border-radius: 999px; background: rgba(201, 162, 75, 0.14); color: var(--c-secondary); font-size: 13px; font-weight: 600; }
        .article-head-card .date { font-size: 14px; color: var(--c-muted); }
        .article-head-card h1 { font-size: 36px; line-height: 1.3; font-weight: 700; color: var(--c-primary); margin-bottom: 16px; }
        .article-head-card .article-excerpt { font-size: 16px; color: var(--c-muted); max-width: 760px; }

        /* Article Layout */
        .article-layout { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 40px; }
        .article-content { background: #fff; border: 1px solid var(--c-border); border-radius: var(--radius-md); padding: 40px 36px; box-shadow: var(--shadow-sm); }
        .article-content h2 { font-size: 26px; font-weight: 700; color: var(--c-primary); margin: 32px 0 14px; }
        .article-content h3 { font-size: 20px; font-weight: 600; color: var(--c-primary); margin: 24px 0 10px; }
        .article-content p { margin-bottom: 16px; }
        .article-content blockquote { margin: 20px 0; padding: 16px 20px; background: #F1EDE4; border-left: 3px solid var(--c-primary); color: var(--c-text); border-radius: 0 10px 10px 0; }
        .article-content ul, .article-content ol { margin: 12px 0 16px 24px; }
        .article-content li { margin-bottom: 8px; }
        .article-content img { margin: 20px auto; border-radius: var(--radius-md); }
        .article-empty { text-align: center; padding: 40px 20px; }
        .article-empty p { font-size: 17px; color: var(--c-muted); margin-bottom: 20px; }

        .article-aside { display: flex; flex-direction: column; gap: 20px; }
        .download-side-card { background: var(--c-primary); color: #fff; border-radius: var(--radius-md); padding: 20px; box-shadow: var(--shadow-md); }
        .download-side-card .side-card-image { margin: -20px -20px 16px; border-radius: var(--radius-md) var(--radius-md) 0 0; overflow: hidden; }
        .download-side-card .side-card-image img { width: 100%; height: 180px; object-fit: cover; }
        .download-side-card h3 { font-size: 20px; font-weight: 700; margin-bottom: 8px; }
        .download-side-card p { font-size: 14px; color: rgba(255,255,255,0.8); margin-bottom: 16px; }
        .side-official-card { background: #fff; border: 1px solid var(--c-border); border-radius: var(--radius-md); padding: 20px; box-shadow: var(--shadow-sm); }
        .side-official-card h4 { font-size: 16px; font-weight: 700; color: var(--c-primary); margin-bottom: 6px; }
        .side-official-card p { font-size: 14px; color: var(--c-muted); margin-bottom: 10px; }
        .side-official-card a { font-size: 14px; font-weight: 600; color: var(--c-secondary); }
        .side-official-card a:hover { color: var(--c-primary); }

        /* CTA */
        .article-download-cta { display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
        .article-download-cta h2 { font-size: 26px; font-weight: 700; color: var(--c-primary); margin-bottom: 6px; }
        .article-download-cta p { font-size: 15px; color: var(--c-muted); }

        /* Related */
        .related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
        .article-card { background: #fff; border: 1px solid var(--c-border); border-radius: var(--radius-md); overflow: hidden; box-shadow: var(--shadow-sm); transition: box-shadow var(--transition), transform var(--transition); }
        .article-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-2px); }
        .article-card-img { height: 180px; overflow: hidden; }
        .article-card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform var(--transition); }
        .article-card:hover .article-card-img img { transform: scale(1.03); }
        .article-card-body { padding: 18px; }
        .article-card-meta { display: flex; align-items: center; gap: 12px; font-size: 13px; color: var(--c-muted); margin-bottom: 8px; }
        .article-card-meta .badge { font-size: 12px; padding: 2px 10px; }
        .article-card h3 { font-size: 18px; font-weight: 700; line-height: 1.4; margin-bottom: 8px; }
        .article-card h3 a:hover { color: var(--c-primary); }
        .article-card p { font-size: 14px; color: var(--c-muted); margin-bottom: 0; }

        /* Back */
        .back-section { background: #fff; border-top: 1px solid var(--c-border); }
        .back-link { display: inline-flex; align-items: center; gap: 8px; font-size: 15px; font-weight: 600; color: var(--c-primary); }
        .back-link:hover { color: var(--c-secondary); }

        /* Footer */
        .site-footer { background: var(--c-primary-deep); color: rgba(255,255,255,0.75); padding: 56px 0 24px; }
        .footer-grid { display: grid; grid-template-columns: 1.3fr 1fr 1fr 1.2fr; gap: 32px; padding-bottom: 32px; border-bottom: 1px solid rgba(230,199,122,0.15); }
        .footer-brand p { font-size: 14px; margin-top: 14px; max-width: 260px; }
        .footer-col h4 { font-size: 14px; font-weight: 700; color: var(--c-accent); margin-bottom: 14px; }
        .footer-col a, .footer-col span { display: block; font-size: 13px; color: rgba(255,255,255,0.7); margin-bottom: 10px; }
        .footer-col a:hover { color: #fff; }
        .footer-bottom { padding-top: 20px; text-align: center; font-size: 13px; color: rgba(255,255,255,0.55); }

        /* Responsive */
        @media (max-width: 1023px) {
            .article-layout { grid-template-columns: 1fr; }
            .article-content { padding: 28px 20px; }
            .related-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; }
            .main-nav { top: var(--header-h); }
        }
        @media (max-width: 767px) {
            :root { --section-pad: 40px; --header-h: 60px; }
            .section-header h2 { font-size: 24px; }
            .article-head-card h1 { font-size: 28px; }
            .related-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .article-download-cta { flex-direction: column; align-items: flex-start; }
            .header-cta .btn { display: none; }
            .header-cta .nav-toggle { display: flex; }
        }

/* roulang page: category1 */
:root {
            --c-primary: #0E2E24;
            --c-primary-deep: #0D1E1A;
            --c-secondary: #C9A24B;
            --c-accent: #E6C77A;
            --c-bg: #F7F5F0;
            --c-card: #FFFFFF;
            --c-text: #1B1F1D;
            --c-muted: #6A726E;
            --c-border: rgba(14, 46, 36, 0.08);
            --c-success: #2D7A4F;
            --c-warning: #A65D2A;
            --c-danger: #B5483D;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 12px rgba(14, 30, 26, 0.05);
            --shadow-md: 0 6px 24px rgba(14, 30, 26, 0.06);
            --shadow-lg: 0 12px 32px rgba(14, 30, 26, 0.12);
            --shadow-glow: 0 8px 28px rgba(201, 162, 75, 0.22);
            --font-base: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            --font-num: "DIN Alternate", "Roboto", monospace;
            --container: 1200px;
            --header-h: 68px;
            --section-pad: 72px;
            --transition: 0.24s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-base);
            font-size: 16px;
            line-height: 1.8;
            color: var(--c-text);
            background-color: var(--c-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition);
        }
        button, input, select, textarea {
            font-family: inherit;
            font-size: inherit;
            outline: none;
            border: none;
        }
        .container {
            width: 100%;
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 20px;
        }
        .section {
            padding: var(--section-pad) 0;
        }
        .section-tight {
            padding: 48px 0;
        }
        .section-dark {
            background-color: var(--c-primary);
            color: #fff;
        }
        .section-soft {
            background-color: #F1EDE4;
        }
        .section-white {
            background-color: #fff;
        }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.06em;
            color: var(--c-secondary);
            text-transform: uppercase;
            margin-bottom: 10px;
        }
        .section-header h2 {
            font-size: 30px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--c-text);
        }
        .section-header p {
            font-size: 15px;
            color: var(--c-muted);
            margin-top: 12px;
            max-width: 620px;
            margin-left: auto;
            margin-right: auto;
        }
        .section-dark .section-header h2 {
            color: #fff;
        }
        .section-dark .section-header p {
            color: rgba(255, 255, 255, 0.7);
        }
        .section-dark .section-header .section-tag {
            color: var(--c-accent);
        }

        /* ========== Header / Nav ========== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--header-h);
            z-index: 1000;
            background: rgba(247, 245, 240, 0.96);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid transparent;
            transition: box-shadow var(--transition), border-color var(--transition), background var(--transition);
        }
        .site-header.scrolled {
            box-shadow: 0 4px 24px rgba(14, 30, 26, 0.12);
            border-bottom-color: var(--c-border);
            background: rgba(255, 255, 255, 0.98);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            gap: 24px;
        }
        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .brand-icon {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--c-secondary), var(--c-accent));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 18px;
            color: var(--c-primary);
            flex-shrink: 0;
        }
        .brand-text {
            font-size: 17px;
            font-weight: 700;
            color: var(--c-primary);
            letter-spacing: 0.02em;
            white-space: nowrap;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .main-nav a {
            display: block;
            padding: 8px 14px;
            font-size: 15px;
            font-weight: 500;
            color: var(--c-text);
            border-radius: var(--radius-sm);
            position: relative;
            transition: color var(--transition), background var(--transition);
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            left: 14px;
            right: 14px;
            bottom: 2px;
            height: 2px;
            background: var(--c-secondary);
            border-radius: 2px;
            transform: scaleX(0);
            transform-origin: left;
            transition: transform var(--transition);
        }
        .main-nav a:hover {
            color: var(--c-primary);
            background: rgba(14, 46, 36, 0.04);
        }
        .main-nav a:hover::after {
            transform: scaleX(1);
        }
        .main-nav a.active {
            color: var(--c-secondary);
            font-weight: 700;
        }
        .main-nav a.active::after {
            transform: scaleX(1);
        }
        .header-cta {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-weight: 600;
            border-radius: 10px;
            padding: 12px 24px;
            font-size: 15px;
            line-height: 1.5;
            cursor: pointer;
            transition: background var(--transition), color var(--transition), box-shadow var(--transition), transform var(--transition), border var(--transition);
            border: 1px solid transparent;
            text-align: center;
        }
        .btn:focus {
            outline: 2px solid var(--c-accent);
            outline-offset: 2px;
        }
        .btn:active {
            transform: translateY(1px);
        }
        .btn-primary {
            background: var(--c-secondary);
            color: var(--c-primary);
            border-color: var(--c-secondary);
        }
        .btn-primary:hover {
            background: var(--c-accent);
            color: var(--c-primary);
            box-shadow: var(--shadow-glow);
        }
        .btn-outline {
            background: transparent;
            color: var(--c-primary);
            border-color: var(--c-primary);
        }
        .btn-outline:hover {
            background: var(--c-primary);
            color: #fff;
            box-shadow: var(--shadow-md);
        }
        .btn-sm {
            padding: 9px 18px;
            font-size: 14px;
            border-radius: 8px;
        }
        .btn-lg {
            padding: 14px 32px;
            font-size: 16px;
            border-radius: 12px;
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            gap: 4px;
            width: 42px;
            height: 42px;
            border-radius: var(--radius-sm);
            background: transparent;
            cursor: pointer;
            border: 1px solid var(--c-border);
            transition: background var(--transition);
        }
        .nav-toggle .bar {
            display: block;
            width: 20px;
            height: 2px;
            border-radius: 2px;
            background: var(--c-primary);
            transition: transform var(--transition), opacity var(--transition);
        }
        .nav-toggle:hover {
            background: rgba(14, 46, 36, 0.06);
        }
        .nav-overlay {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(14, 30, 26, 0.55);
            z-index: 999;
            opacity: 0;
            pointer-events: none;
            transition: opacity var(--transition);
        }
        .nav-overlay.active {
            opacity: 1;
            pointer-events: auto;
        }

        /* ========== 分类头 ========== */
        .category-hero {
            padding: calc(var(--header-h) + 48px) 0 40px;
            background: var(--c-bg);
            position: relative;
            overflow: hidden;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(14, 46, 36, 0.04) 0%, rgba(201, 162, 75, 0.06) 100%);
            pointer-events: none;
        }
        .category-hero .container {
            position: relative;
            z-index: 1;
        }
        .breadcrumb-custom {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--c-muted);
            margin-bottom: 16px;
            flex-wrap: wrap;
        }
        .breadcrumb-custom a {
            color: var(--c-muted);
            transition: color var(--transition);
        }
        .breadcrumb-custom a:hover {
            color: var(--c-secondary);
        }
        .breadcrumb-custom .sep {
            color: rgba(14, 46, 36, 0.3);
            font-size: 12px;
        }
        .breadcrumb-custom .current {
            color: var(--c-primary);
            font-weight: 600;
        }
        .category-hero h1 {
            font-size: 34px;
            font-weight: 700;
            color: var(--c-primary);
            line-height: 1.3;
            margin-bottom: 12px;
            letter-spacing: 0.01em;
        }
        .category-hero .cat-desc {
            font-size: 16px;
            color: var(--c-muted);
            max-width: 720px;
            line-height: 1.8;
            margin-bottom: 0;
        }

        /* ========== 版本卡片列表 ========== */
        .version-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .version-card {
            background: var(--c-card);
            border: 1px solid var(--c-border);
            border-radius: var(--radius-md);
            padding: 22px 24px;
            display: flex;
            align-items: center;
            gap: 20px;
            flex-wrap: wrap;
            box-shadow: var(--shadow-sm);
            transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
            position: relative;
            overflow: hidden;
        }
        .version-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
            border-color: rgba(201, 162, 75, 0.35);
        }
        .version-card .vc-icon {
            width: 56px;
            height: 56px;
            border-radius: 14px;
            background: rgba(14, 46, 36, 0.05);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            overflow: hidden;
        }
        .version-card .vc-icon img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 14px;
        }
        .version-card .vc-icon .icon-fallback {
            font-size: 26px;
            font-weight: 700;
            color: var(--c-secondary);
        }
        .version-card .vc-info {
            flex: 1;
            min-width: 200px;
        }
        .version-card .vc-name {
            font-size: 18px;
            font-weight: 700;
            color: var(--c-text);
            margin-bottom: 6px;
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
        }
        .version-card .vc-name .badge-version {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            color: var(--c-primary);
            background: rgba(201, 162, 75, 0.18);
            padding: 2px 10px;
            border-radius: 20px;
            letter-spacing: 0.03em;
        }
        .version-card .vc-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            font-size: 13px;
            color: var(--c-muted);
        }
        .version-card .vc-meta span {
            display: flex;
            align-items: center;
            gap: 5px;
        }
        .version-card .vc-meta .label {
            font-weight: 600;
            color: var(--c-text);
        }
        .version-card .vc-actions {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .version-card .vc-actions .btn {
            white-space: nowrap;
        }
        .version-card .vc-actions .btn-text-link {
            font-size: 13px;
            color: var(--c-muted);
            padding: 8px 12px;
            border-radius: var(--radius-sm);
            transition: color var(--transition), background var(--transition);
            white-space: nowrap;
        }
        .version-card .vc-actions .btn-text-link:hover {
            color: var(--c-secondary);
            background: rgba(201, 162, 75, 0.08);
        }

        /* ========== 安装步骤 ========== */
        .install-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            counter-reset: step-counter;
            position: relative;
        }
        .install-steps::before {
            content: '';
            position: absolute;
            top: 32px;
            left: 12.5%;
            right: 12.5%;
            height: 2px;
            background: linear-gradient(90deg, var(--c-secondary), rgba(201, 162, 75, 0.3));
            z-index: 0;
        }
        .install-step {
            background: var(--c-card);
            border: 1px solid var(--c-border);
            border-radius: var(--radius-md);
            padding: 28px 22px 22px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            transition: box-shadow var(--transition), transform var(--transition);
            position: relative;
            z-index: 1;
        }
        .install-step:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .install-step .step-num {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: var(--c-primary);
            color: var(--c-accent);
            font-size: 22px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            font-family: var(--font-num);
            border: 2px solid var(--c-accent);
        }
        .install-step h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--c-text);
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .install-step p {
            font-size: 14px;
            color: var(--c-muted);
            line-height: 1.6;
            margin-bottom: 0;
        }

        /* ========== 系统兼容表 ========== */
        .compat-table-wrap {
            background: var(--c-card);
            border: 1px solid var(--c-border);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
        }
        .compat-table {
            width: 100%;
            border-collapse: collapse;
            min-width: 600px;
        }
        .compat-table th {
            background: var(--c-primary);
            color: #fff;
            font-weight: 600;
            font-size: 14px;
            padding: 14px 18px;
            text-align: left;
            border-bottom: 2px solid rgba(201, 162, 75, 0.4);
            white-space: nowrap;
        }
        .compat-table td {
            padding: 14px 18px;
            font-size: 14px;
            color: var(--c-text);
            border-bottom: 1px solid var(--c-border);
            vertical-align: middle;
        }
        .compat-table tr:last-child td {
            border-bottom: none;
        }
        .compat-table tr:hover td {
            background: rgba(201, 162, 75, 0.04);
        }
        .compat-table .tag-status {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            padding: 3px 12px;
            border-radius: 20px;
            background: rgba(45, 122, 79, 0.14);
            color: var(--c-success);
        }
        .compat-table .tag-status.warning {
            background: rgba(166, 93, 42, 0.14);
            color: var(--c-warning);
        }
        .table-scroll {
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
        }
        .table-scroll::-webkit-scrollbar {
            height: 6px;
        }
        .table-scroll::-webkit-scrollbar-track {
            background: rgba(14, 46, 36, 0.04);
        }
        .table-scroll::-webkit-scrollbar-thumb {
            background: rgba(14, 46, 36, 0.2);
            border-radius: 3px;
        }

        /* ========== 常见安装异常 ========== */
        .issue-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
            max-width: 800px;
            margin: 0 auto;
        }
        .issue-item {
            background: var(--c-card);
            border: 1px solid var(--c-border);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: border-color var(--transition), box-shadow var(--transition);
        }
        .issue-item:hover {
            border-color: rgba(201, 162, 75, 0.35);
            box-shadow: var(--shadow-sm);
        }
        .issue-item .issue-toggle {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 16px 20px;
            background: transparent;
            cursor: pointer;
            font-size: 15px;
            font-weight: 600;
            color: var(--c-text);
            text-align: left;
            transition: background var(--transition);
        }
        .issue-item .issue-toggle:hover {
            background: rgba(201, 162, 75, 0.06);
        }
        .issue-item .issue-toggle .toggle-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(14, 46, 36, 0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            font-weight: 700;
            color: var(--c-secondary);
            transition: transform var(--transition), background var(--transition);
        }
        .issue-item .issue-toggle[aria-expanded="true"] .toggle-icon {
            transform: rotate(45deg);
            background: rgba(201, 162, 75, 0.2);
        }
        .issue-item .issue-body {
            padding: 0 20px 18px;
            font-size: 14px;
            color: var(--c-muted);
            line-height: 1.7;
            display: none;
        }
        .issue-item .issue-body.open {
            display: block;
        }
        .issue-item .issue-body p {
            margin-bottom: 6px;
        }
        .issue-item .issue-body p:last-child {
            margin-bottom: 0;
        }

        /* ========== 相关文章 ========== */
        .article-list-cat {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .article-list-cat .article-card {
            background: var(--c-card);
            border: 1px solid var(--c-border);
            border-radius: var(--radius-md);
            padding: 22px 24px;
            box-shadow: var(--shadow-sm);
            transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .article-list-cat .article-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
            border-color: rgba(201, 162, 75, 0.3);
        }
        .article-list-cat .article-card .ac-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 12px;
            color: var(--c-muted);
            flex-wrap: wrap;
        }
        .article-list-cat .article-card .ac-meta .badge-cat {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            color: var(--c-secondary);
            background: rgba(201, 162, 75, 0.1);
            padding: 2px 10px;
            border-radius: 20px;
        }
        .article-list-cat .article-card h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--c-text);
            line-height: 1.45;
            margin-bottom: 0;
        }
        .article-list-cat .article-card .ac-excerpt {
            font-size: 14px;
            color: var(--c-muted);
            line-height: 1.6;
            margin-bottom: 0;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .article-list-cat .article-card .ac-link {
            font-size: 13px;
            font-weight: 600;
            color: var(--c-secondary);
            align-self: flex-start;
            padding: 4px 0;
            transition: color var(--transition);
        }
        .article-list-cat .article-card .ac-link:hover {
            color: var(--c-primary);
        }
        .empty-state {
            grid-column: 1 / -1;
            background: rgba(14, 46, 36, 0.04);
            border: 1px dashed var(--c-border);
            border-radius: var(--radius-md);
            padding: 48px 24px;
            text-align: center;
            color: var(--c-muted);
            font-size: 15px;
        }
        .empty-state .empty-icon {
            font-size: 36px;
            display: block;
            margin-bottom: 12px;
            color: rgba(14, 46, 36, 0.3);
        }

        /* ========== CTA 转化 ========== */
        .cta-strip {
            background: var(--c-primary);
            border-radius: var(--radius-lg);
            padding: 32px 36px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            flex-wrap: wrap;
            box-shadow: var(--shadow-md);
            position: relative;
            overflow: hidden;
        }
        .cta-strip::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at top right, rgba(201, 162, 75, 0.18), transparent 50%);
            pointer-events: none;
        }
        .cta-strip .cta-content {
            position: relative;
            z-index: 1;
            flex: 1;
            min-width: 200px;
        }
        .cta-strip .cta-content h3 {
            font-size: 22px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 6px;
            line-height: 1.4;
        }
        .cta-strip .cta-content p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.75);
            margin-bottom: 0;
        }
        .cta-strip .cta-actions {
            position: relative;
            z-index: 1;
            display: flex;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
        }
        .cta-strip .btn-outline-light {
            background: transparent;
            color: #fff;
            border-color: rgba(255, 255, 255, 0.4);
        }
        .cta-strip .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: #fff;
            color: #fff;
        }

        /* ========== Footer ========== */
        .site-footer {
            background: var(--c-primary-deep);
            color: rgba(255, 255, 255, 0.85);
            padding: 56px 0 24px;
            margin-top: 0;
        }
        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1.4fr;
            gap: 36px;
            padding-bottom: 36px;
            border-bottom: 1px solid rgba(230, 199, 122, 0.15);
        }
        .site-footer .footer-brand p {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.65);
            line-height: 1.7;
            margin-top: 14px;
            margin-bottom: 0;
            max-width: 300px;
        }
        .site-footer .footer-col h4 {
            font-size: 14px;
            font-weight: 700;
            color: var(--c-accent);
            margin-bottom: 16px;
            letter-spacing: 0.03em;
        }
        .site-footer .footer-col a,
        .site-footer .footer-col span {
            display: block;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 10px;
            line-height: 1.6;
            transition: color var(--transition);
        }
        .site-footer .footer-col a:hover {
            color: var(--c-accent);
        }
        .site-footer .footer-bottom {
            padding-top: 18px;
            text-align: center;
            font-size: 12px;
            color: rgba(255, 255, 255, 0.45);
        }
        .site-footer .footer-bottom p {
            margin-bottom: 0;
        }
        .site-footer .brand-icon {
            width: 32px;
            height: 32px;
            font-size: 15px;
            border-radius: 8px;
        }
        .site-footer .brand-text {
            font-size: 16px;
            color: #fff;
        }

        /* ========== 响应式 ========== */
        @media (max-width: 1024px) {
            :root {
                --section-pad: 52px;
            }
            .main-nav {
                gap: 2px;
            }
            .main-nav a {
                padding: 8px 10px;
                font-size: 14px;
            }
            .main-nav a::after {
                left: 10px;
                right: 10px;
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 28px;
            }
            .install-steps {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .install-steps::before {
                display: none;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-pad: 40px;
                --header-h: 60px;
            }
            .category-hero {
                padding: calc(var(--header-h) + 36px) 0 28px;
            }
            .category-hero h1 {
                font-size: 26px;
            }
            .category-hero .cat-desc {
                font-size: 15px;
            }
            .main-nav {
                position: fixed;
                top: var(--header-h);
                right: -280px;
                width: 280px;
                height: calc(100vh - var(--header-h));
                background: #fff;
                flex-direction: column;
                align-items: stretch;
                gap: 0;
                padding: 16px;
                box-shadow: -8px 0 32px rgba(14, 30, 26, 0.12);
                transition: right var(--transition);
                z-index: 1001;
                overflow-y: auto;
            }
            .main-nav.open {
                right: 0;
            }
            .main-nav a {
                padding: 14px 16px;
                font-size: 16px;
                border-bottom: 1px solid var(--c-border);
                border-radius: 0;
            }
            .main-nav a::after {
                display: none;
            }
            .main-nav a.active {
                background: rgba(201, 162, 75, 0.08);
                border-left: 3px solid var(--c-secondary);
            }
            .nav-toggle {
                display: flex;
            }
            .header-cta .btn {
                display: none;
            }
            .version-card {
                flex-direction: column;
                align-items: flex-start;
                padding: 18px;
                gap: 14px;
            }
            .version-card .vc-actions {
                width: 100%;
                justify-content: flex-start;
                flex-wrap: wrap;
            }
            .version-card .vc-actions .btn {
                flex: 1;
                min-width: 140px;
            }
            .install-steps {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .install-step {
                padding: 20px 16px;
            }
            .install-step .step-num {
                width: 42px;
                height: 42px;
                font-size: 18px;
                margin-bottom: 12px;
            }
            .install-step h3 {
                font-size: 15px;
            }
            .install-step p {
                font-size: 13px;
            }
            .compat-table-wrap {
                border-radius: var(--radius-sm);
            }
            .article-list-cat {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .cta-strip {
                padding: 24px 20px;
                flex-direction: column;
                align-items: flex-start;
                gap: 16px;
            }
            .cta-strip .cta-content h3 {
                font-size: 18px;
            }
            .cta-strip .cta-actions {
                width: 100%;
            }
            .cta-strip .cta-actions .btn {
                flex: 1;
                min-width: 120px;
            }
            .section-header {
                margin-bottom: 32px;
            }
            .section-header h2 {
                font-size: 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 22px;
                padding-bottom: 24px;
            }
            .site-footer {
                padding: 40px 0 18px;
            }
        }

        @media (max-width: 520px) {
            .category-hero h1 {
                font-size: 22px;
            }
            .install-steps {
                grid-template-columns: 1fr;
                gap: 10px;
            }
            .version-card .vc-name {
                font-size: 16px;
            }
            .version-card .vc-meta {
                gap: 8px;
                font-size: 12px;
            }
            .version-card .vc-meta span {
                flex-wrap: wrap;
            }
            .compat-table th,
            .compat-table td {
                padding: 10px 12px;
                font-size: 13px;
            }
            .cta-strip .cta-actions {
                flex-direction: column;
            }
            .cta-strip .cta-actions .btn {
                width: 100%;
            }
            .breadcrumb-custom {
                font-size: 12px;
                gap: 5px;
            }
            .article-list-cat .article-card {
                padding: 18px;
            }
        }

/* roulang page: category2 */
:root {
            --c-primary: #0E2E24;
            --c-primary-deep: #0D1E1A;
            --c-secondary: #C9A24B;
            --c-accent: #E6C77A;
            --c-bg: #F7F5F0;
            --c-card: #FFFFFF;
            --c-text: #1B1F1D;
            --c-muted: #6A726E;
            --c-border: rgba(14, 46, 36, 0.08);
            --c-success: #2D7A4F;
            --c-warning: #A65D2A;
            --c-danger: #B5483D;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 12px rgba(14, 30, 26, 0.05);
            --shadow-md: 0 6px 24px rgba(14, 30, 26, 0.06);
            --shadow-lg: 0 12px 32px rgba(14, 30, 26, 0.12);
            --shadow-glow: 0 8px 28px rgba(201, 162, 75, 0.22);
            --font-base: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            --font-num: "DIN Alternate", "Roboto", monospace;
            --container: 1200px;
            --header-h: 68px;
            --section-pad: 72px;
            --transition: 0.24s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        }

        * {
            box-sizing: border-box;
        }

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

        body {
            font-family: var(--font-base);
            font-size: 16px;
            line-height: 1.8;
            color: var(--c-text);
            background-color: var(--c-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            margin: 0;
            padding-top: var(--header-h);
        }

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

        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition);
        }

        button, input, select, textarea {
            font-family: inherit;
            font-size: inherit;
            outline: none;
            border: none;
        }

        .container {
            width: 100%;
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 20px;
        }

        .section {
            padding: var(--section-pad) 0;
        }

        .section-tight {
            padding: 48px 0;
        }

        .section-dark {
            background-color: var(--c-primary);
            color: #fff;
        }

        .section-soft {
            background-color: #F1EDE4;
        }

        .section-white {
            background-color: #fff;
        }

        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }

        .section-header .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.06em;
            color: var(--c-secondary);
            text-transform: uppercase;
            margin-bottom: 10px;
        }

        .section-header h2 {
            font-size: 30px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--c-text);
            margin: 0;
        }

        .section-header p {
            font-size: 15px;
            color: var(--c-muted);
            margin-top: 12px;
            max-width: 620px;
            margin-left: auto;
            margin-right: auto;
        }

        .section-dark .section-header h2 {
            color: #fff;
        }

        .section-dark .section-header p {
            color: rgba(255, 255, 255, 0.7);
        }

        .section-dark .section-header .section-tag {
            color: var(--c-accent);
        }

        /* Header / Nav */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--header-h);
            z-index: 1000;
            background: rgba(247, 245, 240, 0.96);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid transparent;
            transition: box-shadow var(--transition), border-color var(--transition), background var(--transition);
        }

        .site-header.scrolled {
            box-shadow: 0 4px 24px rgba(14, 30, 26, 0.12);
            border-bottom-color: var(--c-border);
            background: rgba(255, 255, 255, 0.98);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            gap: 24px;
        }

        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .brand-icon {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--c-secondary), var(--c-accent));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 18px;
            color: var(--c-primary);
            flex-shrink: 0;
        }

        .brand-text {
            font-size: 17px;
            font-weight: 700;
            color: var(--c-primary);
            letter-spacing: 0.02em;
            white-space: nowrap;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .main-nav a {
            display: block;
            padding: 8px 14px;
            font-size: 15px;
            font-weight: 500;
            color: var(--c-text);
            border-radius: var(--radius-sm);
            position: relative;
            transition: color var(--transition), background var(--transition);
        }

        .main-nav a::after {
            content: '';
            position: absolute;
            left: 14px;
            right: 14px;
            bottom: 2px;
            height: 2px;
            background: var(--c-secondary);
            border-radius: 2px;
            transform: scaleX(0);
            transform-origin: left;
            transition: transform var(--transition);
        }

        .main-nav a:hover {
            color: var(--c-primary);
            background: rgba(14, 46, 36, 0.04);
        }

        .main-nav a:hover::after {
            transform: scaleX(1);
        }

        .main-nav a.active {
            color: var(--c-secondary);
            font-weight: 700;
        }

        .main-nav a.active::after {
            transform: scaleX(1);
        }

        .header-cta {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: 10px;
            font-weight: 600;
            font-size: 15px;
            line-height: 1.4;
            cursor: pointer;
            transition: background var(--transition), color var(--transition), box-shadow var(--transition), transform var(--transition);
            text-align: center;
            border: 1px solid transparent;
        }

        .btn:focus-visible {
            outline: 2px solid var(--c-accent);
            outline-offset: 2px;
        }

        .btn-primary {
            background-color: var(--c-secondary);
            color: var(--c-primary);
            border-color: var(--c-secondary);
        }

        .btn-primary:hover {
            background-color: var(--c-accent);
            border-color: var(--c-accent);
            box-shadow: var(--shadow-glow);
            transform: translateY(-1px);
        }

        .btn-outline {
            background-color: transparent;
            color: var(--c-primary);
            border: 1px solid var(--c-border);
        }

        .btn-outline:hover {
            background-color: rgba(14, 46, 36, 0.04);
            border-color: var(--c-secondary);
            color: var(--c-primary);
        }

        .btn-light {
            background-color: #fff;
            color: var(--c-primary);
            border-color: #fff;
        }

        .btn-light:hover {
            background-color: var(--c-accent);
            border-color: var(--c-accent);
        }

        .btn-sm {
            padding: 8px 16px;
            font-size: 14px;
            border-radius: 8px;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            gap: 5px;
            background: transparent;
            cursor: pointer;
            padding: 10px;
            border-radius: 8px;
        }

        .nav-toggle .bar {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--c-primary);
            border-radius: 2px;
            transition: opacity var(--transition), transform var(--transition);
        }

        .nav-overlay {
            position: fixed;
            inset: 0;
            background: rgba(14, 30, 26, 0.55);
            z-index: 999;
            opacity: 0;
            visibility: hidden;
            transition: opacity var(--transition), visibility var(--transition);
        }

        .nav-overlay.show {
            opacity: 1;
            visibility: visible;
        }

        /* Page Header (category hero) */
        .page-header {
            background: #F1EDE4;
            border-bottom: 1px solid var(--c-border);
            padding: 40px 0 36px;
        }

        .breadcrumb {
            font-size: 14px;
            color: var(--c-muted);
            margin-bottom: 12px;
        }

        .breadcrumb a {
            color: var(--c-secondary);
        }

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

        .page-header h1 {
            font-size: 36px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--c-primary);
            margin: 0 0 12px;
        }

        .page-header .lead {
            font-size: 17px;
            color: var(--c-muted);
            max-width: 720px;
            margin: 0;
        }

        /* Cards */
        .feature-card {
            background: var(--c-card);
            border: 1px solid var(--c-border);
            border-radius: var(--radius-md);
            padding: 24px;
            height: 100%;
            transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
        }

        .feature-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
            border-color: rgba(201, 162, 75, 0.25);
        }

        .feature-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: rgba(201, 162, 75, 0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            color: var(--c-secondary);
            margin-bottom: 16px;
        }

        .feature-card h3 {
            font-size: 19px;
            font-weight: 700;
            color: var(--c-primary);
            margin: 0 0 8px;
        }

        .feature-card p {
            font-size: 14px;
            color: var(--c-muted);
            margin: 0;
            line-height: 1.7;
        }

        /* Split section */
        .split-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .split-grid.reversed .split-text {
            order: 2;
        }

        .split-grid.reversed .split-media {
            order: 1;
        }

        .split-text h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--c-primary);
            margin: 0 0 16px;
        }

        .split-text p {
            font-size: 15px;
            color: var(--c-muted);
            margin: 0 0 20px;
            line-height: 1.8;
        }

        .split-media {
            background: #E6E0D4;
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--c-border);
            box-shadow: var(--shadow-md);
        }

        .split-media img {
            width: 100%;
            height: auto;
            display: block;
        }

        /* Step list */
        .steps-vertical {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }

        .step-item {
            display: flex;
            gap: 20px;
            align-items: flex-start;
        }

        .step-number {
            flex-shrink: 0;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--c-primary);
            color: var(--c-accent);
            font-weight: 700;
            font-size: 18px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-family: var(--font-num);
        }

        .step-content h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--c-primary);
            margin: 0 0 6px;
        }

        .step-content p {
            font-size: 14px;
            color: var(--c-muted);
            margin: 0;
        }

        /* Highlight list */
        .highlight-list {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .highlight-item {
            background: var(--c-card);
            border: 1px solid var(--c-border);
            border-radius: var(--radius-md);
            padding: 24px;
            text-align: center;
            transition: box-shadow var(--transition), transform var(--transition);
        }

        .highlight-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }

        .highlight-icon {
            width: 44px;
            height: 44px;
            margin: 0 auto 12px;
            border-radius: 12px;
            background: rgba(201, 162, 75, 0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: var(--c-secondary);
        }

        .highlight-item h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--c-primary);
            margin: 0 0 6px;
        }

        .highlight-item p {
            font-size: 14px;
            color: var(--c-muted);
            margin: 0;
            line-height: 1.7;
        }

        /* Article list */
        .article-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }

        .article-card {
            background: var(--c-card);
            border: 1px solid var(--c-border);
            border-radius: var(--radius-md);
            padding: 24px;
            transition: box-shadow var(--transition), transform var(--transition);
        }

        .article-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }

        .article-category {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            color: var(--c-secondary);
            background: rgba(201, 162, 75, 0.12);
            padding: 4px 10px;
            border-radius: 20px;
            margin-bottom: 12px;
        }

        .article-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--c-primary);
            margin: 0 0 8px;
            line-height: 1.4;
        }

        .article-card h3 a {
            color: inherit;
        }

        .article-card h3 a:hover {
            color: var(--c-secondary);
        }

        .article-card .article-meta {
            font-size: 13px;
            color: var(--c-muted);
            margin-bottom: 10px;
        }

        .article-card p {
            font-size: 14px;
            color: var(--c-muted);
            margin: 0;
            line-height: 1.7;
        }

        .empty-state {
            text-align: center;
            padding: 40px 20px;
            color: var(--c-muted);
            background: #F1EDE4;
            border-radius: var(--radius-md);
            grid-column: 1 / -1;
        }

        /* CTA Banner */
        .cta-banner {
            background: var(--c-primary);
            border-radius: var(--radius-lg);
            padding: 48px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            color: #fff;
        }

        .cta-banner h2 {
            font-size: 28px;
            font-weight: 700;
            margin: 0 0 8px;
        }

        .cta-banner p {
            margin: 0;
            font-size: 15px;
            opacity: 0.8;
        }

        .cta-banner .btn {
            flex-shrink: 0;
        }

        /* Footer */
        .site-footer {
            background: var(--c-primary-deep);
            color: rgba(255, 255, 255, 0.75);
            padding: 64px 0 24px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-brand .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
            color: #fff;
        }

        .footer-brand .brand-icon {
            width: 36px;
            height: 36px;
            font-size: 15px;
            background: linear-gradient(135deg, var(--c-secondary), var(--c-accent));
            color: var(--c-primary);
        }

        .footer-brand .brand-text {
            color: #fff;
            font-size: 16px;
        }

        .footer-brand p {
            font-size: 13px;
            line-height: 1.7;
            margin: 0;
            opacity: 0.7;
        }

        .footer-col h4 {
            color: var(--c-accent);
            font-size: 14px;
            font-weight: 700;
            margin: 0 0 16px;
            letter-spacing: 0.04em;
        }

        .footer-col a,
        .footer-col span {
            display: block;
            color: rgba(255, 255, 255, 0.7);
            font-size: 13px;
            line-height: 1.8;
            margin-bottom: 8px;
            transition: color var(--transition);
        }

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

        .footer-col span {
            cursor: default;
            opacity: 0.6;
            margin-bottom: 4px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(230, 199, 122, 0.15);
            padding-top: 20px;
            text-align: center;
            font-size: 13px;
            opacity: 0.6;
        }

        .footer-bottom p {
            margin: 0;
        }

        /* Responsive */
        @media (max-width: 1023px) {
            :root {
                --section-pad: 52px;
            }

            .main-nav {
                position: fixed;
                top: 0;
                right: -320px;
                width: 300px;
                max-width: 85vw;
                height: 100vh;
                background: #fff;
                flex-direction: column;
                align-items: flex-start;
                gap: 16px;
                padding: 80px 24px 24px;
                box-shadow: -12px 0 32px rgba(14, 30, 26, 0.15);
                transition: right 0.3s ease;
                z-index: 1001;
            }

            .main-nav.open {
                right: 0;
            }

            .main-nav a {
                width: 100%;
                padding: 12px 16px;
                font-size: 16px;
            }

            .main-nav a::after {
                display: none;
            }

            .nav-toggle {
                display: flex;
            }

            .header-cta .btn {
                display: none;
            }

            .split-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .split-grid.reversed .split-text {
                order: 1;
            }

            .split-grid.reversed .split-media {
                order: 2;
            }

            .highlight-list {
                grid-template-columns: repeat(2, 1fr);
            }

            .article-grid {
                grid-template-columns: 1fr;
            }

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

            .cta-banner {
                flex-direction: column;
                text-align: center;
                padding: 32px 24px;
            }
        }

        @media (max-width: 767px) {
            :root {
                --section-pad: 40px;
                --header-h: 60px;
            }

            body {
                font-size: 15px;
            }

            .page-header {
                padding: 28px 0 24px;
            }

            .page-header h1 {
                font-size: 28px;
            }

            .section-header h2 {
                font-size: 24px;
            }

            .split-text h2 {
                font-size: 24px;
            }

            .highlight-list {
                grid-template-columns: 1fr;
            }

            .steps-vertical {
                gap: 16px;
            }

            .step-number {
                width: 36px;
                height: 36px;
                font-size: 16px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .header-cta .btn {
                display: none;
            }

            .brand-text {
                font-size: 15px;
            }
        }

/* roulang page: category3 */
:root {
            --c-primary: #0E2E24;
            --c-primary-deep: #0D1E1A;
            --c-secondary: #C9A24B;
            --c-accent: #E6C77A;
            --c-bg: #F7F5F0;
            --c-card: #FFFFFF;
            --c-text: #1B1F1D;
            --c-muted: #6A726E;
            --c-border: rgba(14, 46, 36, 0.08);
            --c-success: #2D7A4F;
            --c-warning: #A65D2A;
            --c-danger: #B5483D;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 12px rgba(14, 30, 26, 0.05);
            --shadow-md: 0 6px 24px rgba(14, 30, 26, 0.06);
            --shadow-lg: 0 12px 32px rgba(14, 30, 26, 0.12);
            --shadow-glow: 0 8px 28px rgba(201, 162, 75, 0.22);
            --font-base: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            --font-num: "DIN Alternate", "Roboto", monospace;
            --container: 1200px;
            --header-h: 68px;
            --section-pad: 72px;
            --transition: 0.24s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        }

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

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

        body {
            font-family: var(--font-base);
            font-size: 16px;
            line-height: 1.8;
            color: var(--c-text);
            background-color: var(--c-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            padding-top: var(--header-h);
        }

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

        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition);
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            outline: none;
            border: none;
        }

        .container {
            width: 100%;
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 20px;
        }

        .section {
            padding: var(--section-pad) 0;
        }

        .section-tight {
            padding: 48px 0;
        }

        .section-dark {
            background-color: var(--c-primary);
            color: #fff;
        }

        .section-soft {
            background-color: #F1EDE4;
        }

        .section-white {
            background-color: #fff;
        }

        .section-dark .section-header h2 {
            color: #fff;
        }

        .section-dark .section-header p {
            color: rgba(255, 255, 255, 0.7);
        }

        .section-dark .section-header .section-tag {
            color: var(--c-accent);
        }

        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }

        .section-header .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.06em;
            color: var(--c-secondary);
            text-transform: uppercase;
            margin-bottom: 10px;
        }

        .section-header h2 {
            font-size: 30px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--c-text);
        }

        .section-header p {
            font-size: 15px;
            color: var(--c-muted);
            margin-top: 12px;
            max-width: 620px;
            margin-left: auto;
            margin-right: auto;
        }

        .section-header.text-start {
            text-align: left;
            max-width: 720px;
            margin-left: 0;
            margin-right: auto;
        }
        .section-header.text-start p {
            margin-left: 0;
            margin-right: 0;
        }

        /* ========== Header / Nav ========== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--header-h);
            z-index: 1000;
            background: rgba(247, 245, 240, 0.96);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid transparent;
            transition: box-shadow var(--transition), border-color var(--transition), background var(--transition);
        }

        .site-header.scrolled {
            box-shadow: 0 4px 24px rgba(14, 30, 26, 0.12);
            border-bottom-color: var(--c-border);
            background: rgba(255, 255, 255, 0.98);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            gap: 24px;
        }

        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .brand-icon {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--c-secondary), var(--c-accent));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 18px;
            color: var(--c-primary);
            flex-shrink: 0;
        }

        .brand-text {
            font-size: 17px;
            font-weight: 700;
            color: var(--c-primary);
            letter-spacing: 0.02em;
            white-space: nowrap;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .main-nav a {
            display: block;
            padding: 8px 14px;
            font-size: 15px;
            font-weight: 500;
            color: var(--c-text);
            border-radius: var(--radius-sm);
            position: relative;
            transition: color var(--transition), background var(--transition);
            white-space: nowrap;
        }

        .main-nav a::after {
            content: '';
            position: absolute;
            left: 14px;
            right: 14px;
            bottom: 2px;
            height: 2px;
            background: var(--c-secondary);
            border-radius: 2px;
            transform: scaleX(0);
            transform-origin: left;
            transition: transform var(--transition);
        }

        .main-nav a:hover {
            color: var(--c-primary);
            background: rgba(14, 46, 36, 0.04);
        }

        .main-nav a:hover::after {
            transform: scaleX(1);
        }

        .main-nav a.active {
            color: var(--c-secondary);
            font-weight: 700;
        }

        .main-nav a.active::after {
            transform: scaleX(1);
        }

        .header-cta {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            transition: background var(--transition), box-shadow var(--transition), transform var(--transition), border-color var(--transition);
            border: 1px solid transparent;
            text-align: center;
            line-height: 1.5;
        }

        .btn:focus-visible {
            outline: 2px solid var(--c-accent);
            outline-offset: 2px;
        }

        .btn-primary {
            background: var(--c-secondary);
            color: var(--c-primary);
            border-color: var(--c-secondary);
        }

        .btn-primary:hover {
            background: var(--c-accent);
            border-color: var(--c-accent);
            box-shadow: var(--shadow-glow);
            transform: translateY(-1px);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: var(--shadow-sm);
        }

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

        .btn-secondary:hover {
            background: rgba(14, 46, 36, 0.06);
            border-color: var(--c-secondary);
            color: var(--c-secondary);
        }

        .btn-light {
            background: #fff;
            color: var(--c-primary);
            border-color: #fff;
        }

        .btn-light:hover {
            background: var(--c-accent);
            border-color: var(--c-accent);
            box-shadow: var(--shadow-glow);
            transform: translateY(-1px);
        }

        .btn-dark-outline {
            background: transparent;
            color: #fff;
            border: 1px solid rgba(255, 255, 255, 0.4);
        }

        .btn-dark-outline:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: var(--c-accent);
            color: var(--c-accent);
        }

        .btn-sm {
            padding: 9px 18px;
            font-size: 14px;
            border-radius: 8px;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            justify-content: center;
            gap: 5px;
            width: 40px;
            height: 40px;
            padding: 8px;
            background: transparent;
            border-radius: var(--radius-sm);
            cursor: pointer;
            transition: background var(--transition);
        }

        .nav-toggle:hover {
            background: rgba(14, 46, 36, 0.06);
        }

        .nav-toggle .bar {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--c-primary);
            border-radius: 2px;
            transition: transform var(--transition), opacity var(--transition);
        }

        .nav-toggle.open .bar:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .nav-toggle.open .bar:nth-child(2) {
            opacity: 0;
        }

        .nav-toggle.open .bar:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        .nav-overlay {
            position: fixed;
            inset: 0;
            background: rgba(14, 30, 26, 0.55);
            z-index: 999;
            opacity: 0;
            visibility: hidden;
            transition: opacity var(--transition), visibility var(--transition);
        }

        .nav-overlay.show {
            opacity: 1;
            visibility: visible;
        }

        /* ========== Breadcrumb ========== */
        .breadcrumb-wrap {
            padding: 20px 0 0;
            font-size: 13px;
            color: var(--c-muted);
        }

        .breadcrumb-wrap a {
            color: var(--c-muted);
            transition: color var(--transition);
        }

        .breadcrumb-wrap a:hover {
            color: var(--c-secondary);
        }

        .breadcrumb-wrap .sep {
            margin: 0 8px;
            color: rgba(14, 46, 36, 0.35);
        }

        .breadcrumb-wrap .current {
            color: var(--c-primary);
            font-weight: 600;
        }

        /* ========== Category Hero ========== */
        .category-hero {
            padding: 36px 0 44px;
            background: var(--c-bg);
        }

        .category-hero-inner {
            max-width: 820px;
        }

        .category-hero h1 {
            font-size: 34px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--c-primary);
            margin-bottom: 14px;
        }

        .category-hero .cat-desc {
            font-size: 16px;
            color: var(--c-muted);
            line-height: 1.8;
            max-width: 680px;
        }

        /* ========== Security Verify Section ========== */
        .verify-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .verify-card {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(230, 199, 122, 0.18);
            border-radius: var(--radius-md);
            padding: 24px 22px;
            transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
        }

        .verify-card:hover {
            border-color: rgba(230, 199, 122, 0.42);
            box-shadow: 0 8px 28px rgba(0, 0, 0, 0.18);
            transform: translateY(-2px);
        }

        .verify-card .v-icon {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: rgba(230, 199, 122, 0.14);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--c-accent);
            margin-bottom: 14px;
        }

        .verify-card h3 {
            font-size: 17px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
        }

        .verify-card p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.72);
            line-height: 1.7;
        }

        /* ========== Timeline ========== */
        .timeline {
            position: relative;
            max-width: 720px;
            margin: 0 auto;
            padding-left: 30px;
        }

        .timeline::before {
            content: '';
            position: absolute;
            left: 10px;
            top: 6px;
            bottom: 6px;
            width: 2px;
            background: linear-gradient(to bottom, var(--c-secondary), rgba(201, 162, 75, 0.2));
            border-radius: 2px;
        }

        .timeline-item {
            position: relative;
            padding-bottom: 28px;
        }

        .timeline-item:last-child {
            padding-bottom: 0;
        }

        .timeline-item::before {
            content: '';
            position: absolute;
            left: -26px;
            top: 8px;
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: var(--c-secondary);
            border: 3px solid #fff;
            box-shadow: 0 0 0 2px rgba(201, 162, 75, 0.35);
        }

        .timeline-item .t-step {
            display: inline-block;
            font-size: 12px;
            font-weight: 700;
            color: var(--c-secondary);
            letter-spacing: 0.06em;
            margin-bottom: 4px;
        }

        .timeline-item h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--c-primary);
            margin-bottom: 6px;
        }

        .timeline-item p {
            font-size: 14px;
            color: var(--c-muted);
            line-height: 1.7;
        }

        /* ========== Fund Security ========== */
        .fund-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 16px;
        }

        .fund-item {
            display: flex;
            gap: 14px;
            align-items: flex-start;
            background: var(--c-card);
            border: 1px solid var(--c-border);
            border-radius: var(--radius-md);
            padding: 18px 20px;
            transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
        }

        .fund-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
            border-color: rgba(201, 162, 75, 0.3);
        }

        .fund-item .f-icon {
            width: 36px;
            height: 36px;
            border-radius: 9px;
            background: rgba(14, 46, 36, 0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: var(--c-secondary);
            flex-shrink: 0;
        }

        .fund-item h3 {
            font-size: 15px;
            font-weight: 700;
            color: var(--c-primary);
            margin-bottom: 4px;
        }

        .fund-item p {
            font-size: 13px;
            color: var(--c-muted);
            line-height: 1.7;
        }

        /* ========== Account Center ========== */
        .account-split {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .account-text h3 {
            font-size: 24px;
            font-weight: 700;
            color: var(--c-primary);
            margin-bottom: 16px;
        }

        .account-text p {
            font-size: 15px;
            color: var(--c-muted);
            margin-bottom: 20px;
            line-height: 1.8;
        }

        .account-features {
            list-style: none;
            padding: 0;
            margin: 0 0 24px;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 12px;
        }

        .account-features li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: var(--c-text);
            font-weight: 500;
            padding: 10px 14px;
            background: rgba(14, 46, 36, 0.04);
            border-radius: var(--radius-sm);
            transition: background var(--transition);
        }

        .account-features li:hover {
            background: rgba(201, 162, 75, 0.1);
        }

        .account-features li::before {
            content: '✓';
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 20px;
            height: 20px;
            border-radius: 50%;
            background: var(--c-secondary);
            color: #fff;
            font-size: 11px;
            font-weight: 700;
            flex-shrink: 0;
        }

        .account-img {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            border: 1px solid var(--c-border);
            position: relative;
        }

        .account-img img {
            width: 100%;
            height: auto;
            object-fit: cover;
            aspect-ratio: 4/3;
        }

        .account-img .img-badge {
            position: absolute;
            bottom: 16px;
            left: 16px;
            background: rgba(14, 46, 36, 0.88);
            color: #fff;
            padding: 7px 14px;
            border-radius: 8px;
            font-size: 12px;
            font-weight: 600;
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            border: 1px solid rgba(230, 199, 122, 0.3);
        }

        /* ========== FAQ ========== */
        .faq-list {
            max-width: 820px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--c-card);
            border: 1px solid var(--c-border);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            overflow: hidden;
            transition: box-shadow var(--transition), border-color var(--transition);
        }

        .faq-item:hover {
            border-color: rgba(201, 162, 75, 0.3);
        }

        .faq-item.open {
            border-color: rgba(201, 162, 75, 0.45);
            box-shadow: var(--shadow-md);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            padding: 18px 22px;
            background: transparent;
            cursor: pointer;
            text-align: left;
            font-size: 15px;
            font-weight: 600;
            color: var(--c-primary);
            gap: 16px;
            transition: background var(--transition);
        }

        .faq-question:hover {
            background: rgba(14, 46, 36, 0.03);
        }

        .faq-question .q-icon {
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: rgba(14, 46, 36, 0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            font-weight: 700;
            color: var(--c-secondary);
            flex-shrink: 0;
            transition: transform var(--transition), background var(--transition);
        }

        .faq-item.open .faq-question .q-icon {
            background: var(--c-secondary);
            color: #fff;
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease;
        }

        .faq-answer-inner {
            padding: 0 22px 20px;
            font-size: 14px;
            color: var(--c-muted);
            line-height: 1.8;
        }

        /* ========== Help CTA ========== */
        .help-cta-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
            max-width: 820px;
            margin: 0 auto;
        }

        .help-cta-card {
            background: var(--c-card);
            border: 1px solid var(--c-border);
            border-radius: var(--radius-md);
            padding: 28px 26px;
            transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
            display: flex;
            flex-direction: column;
            align-items: flex-start;
            gap: 12px;
        }

        .help-cta-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-2px);
            border-color: rgba(201, 162, 75, 0.3);
        }

        .help-cta-card .hc-icon {
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: rgba(14, 46, 36, 0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: var(--c-secondary);
        }

        .help-cta-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--c-primary);
        }

        .help-cta-card p {
            font-size: 14px;
            color: var(--c-muted);
            line-height: 1.7;
            flex: 1;
        }

        /* ========== Footer ========== */
        .site-footer {
            background: var(--c-primary-deep);
            color: rgba(255, 255, 255, 0.8);
            padding: 56px 0 32px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 36px;
            padding-bottom: 36px;
            border-bottom: 1px solid rgba(230, 199, 122, 0.15);
            margin-bottom: 24px;
        }

        .footer-brand p {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.6);
            margin-top: 14px;
            line-height: 1.7;
            max-width: 300px;
        }

        .footer-brand .brand-text {
            color: #fff;
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 700;
            color: var(--c-accent);
            margin-bottom: 16px;
            letter-spacing: 0.04em;
        }

        .footer-col a,
        .footer-col span {
            display: block;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.68);
            padding: 5px 0;
            transition: color var(--transition);
            line-height: 1.7;
        }

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

        .footer-bottom {
            text-align: center;
            padding-top: 20px;
        }

        .footer-bottom p {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.45);
        }

        /* ========== Responsive ========== */
        @media (max-width: 1024px) {
            :root {
                --section-pad: 52px;
            }

            .verify-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }

            .account-split {
                gap: 32px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-pad: 40px;
                --header-h: 60px;
            }

            .section-header h2 {
                font-size: 24px;
            }

            .category-hero h1 {
                font-size: 26px;
            }

            .main-nav {
                position: fixed;
                top: 0;
                right: -300px;
                width: 280px;
                height: 100vh;
                background: #fff;
                flex-direction: column;
                align-items: flex-start;
                gap: 6px;
                padding: 80px 24px 24px;
                transition: right var(--transition);
                z-index: 1000;
                box-shadow: var(--shadow-lg);
            }

            .main-nav.open {
                right: 0;
            }

            .main-nav a {
                width: 100%;
                padding: 12px 16px;
                font-size: 16px;
                border-radius: var(--radius-sm);
            }

            .main-nav a::after {
                display: none;
            }

            .main-nav a.active {
                background: rgba(201, 162, 75, 0.12);
            }

            .nav-toggle {
                display: flex;
            }

            .header-cta .btn {
                display: none;
            }

            .verify-grid {
                grid-template-columns: 1fr;
            }

            .fund-list {
                grid-template-columns: 1fr;
            }

            .account-split {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .account-features {
                grid-template-columns: 1fr;
            }

            .help-cta-grid {
                grid-template-columns: 1fr;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
        }

        @media (max-width: 520px) {
            .section-header h2 {
                font-size: 20px;
            }

            .category-hero h1 {
                font-size: 22px;
            }

            .btn {
                padding: 10px 18px;
                font-size: 14px;
            }

            .timeline {
                padding-left: 24px;
            }

            .timeline-item::before {
                left: -20px;
                width: 10px;
                height: 10px;
            }

            .timeline::before {
                left: 7px;
            }
        }