/* roulang page: index */
:root {
            --primary: #0E2E2A;
            --primary-light: #163D37;
            --primary-dark: #08201D;
            --accent: #C8A24B;
            --accent-hover: #B08A33;
            --bg: #F4F0E8;
            --card-bg: #FDFBF7;
            --text: #1C211F;
            --text-muted: #5A625E;
            --text-light: #8A918D;
            --border: #D8DCD4;
            --border-light: #E8E5DE;
            --risk: #B23A2F;
            --risk-bg: #F9E7E4;
            --success: #4F6B58;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(14,46,42,0.06);
            --shadow-md: 0 8px 24px rgba(14,46,42,0.08);
            --shadow-lg: 0 12px 32px rgba(14,46,42,0.14);
            --container: 1180px;
            --header-height: 64px;
            --section-padding: 72px;
            --section-padding-mobile: 44px;
            --transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
            --font-family: 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
        }

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

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

        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.8;
            color: var(--text);
            background-color: var(--bg);
            min-height: 100vh;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

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

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

        button {
            cursor: pointer;
        }

        ul, ol {
            list-style: none;
        }

        a:focus-visible, button:focus-visible, input:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            border-radius: 4px;
        }

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

        /* ============ Header & Navigation ============ */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: var(--primary);
            height: var(--header-height);
            display: flex;
            align-items: center;
            box-shadow: 0 2px 16px rgba(14,46,42,0.18);
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }

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

        .nav-logo-icon {
            width: 34px;
            height: 34px;
            background: var(--accent);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 17px;
            color: var(--primary-dark);
            letter-spacing: 0.5px;
            flex-shrink: 0;
        }

        .nav-logo-text {
            font-size: 17px;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.3px;
            white-space: nowrap;
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
        }

        .nav-menu a {
            color: rgba(255,255,255,0.82);
            font-size: 14.5px;
            font-weight: 500;
            letter-spacing: 0.2px;
            padding: 6px 0;
            position: relative;
            white-space: nowrap;
        }

        .nav-menu a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent);
            transition: var(--transition);
            border-radius: 1px;
        }

        .nav-menu a:hover,
        .nav-menu a.active {
            color: #fff;
        }

        .nav-menu a:hover::after,
        .nav-menu a.active::after {
            width: 100%;
        }

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

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 11px 24px;
            font-size: 14.5px;
            font-weight: 600;
            letter-spacing: 0.3px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
            white-space: nowrap;
            line-height: 1.5;
        }

        .btn-primary {
            background: var(--accent);
            color: var(--primary-dark);
        }

        .btn-primary:hover {
            background: var(--accent-hover);
            box-shadow: 0 4px 16px rgba(200,162,75,0.35);
            transform: translateY(-1px);
        }

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

        .btn-secondary:hover {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 16px rgba(14,46,42,0.18);
            transform: translateY(-1px);
        }

        .btn-sm {
            padding: 8px 16px;
            font-size: 13px;
            border-radius: 6px;
        }

        .btn-lg {
            padding: 15px 32px;
            font-size: 16px;
            border-radius: 10px;
        }

        .nav-hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            width: 32px;
            height: 32px;
            justify-content: center;
            align-items: center;
            background: transparent;
            border: none;
        }

        .nav-hamburger span {
            display: block;
            width: 22px;
            height: 2px;
            background: #fff;
            border-radius: 1px;
            transition: var(--transition);
        }

        .nav-hamburger.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .nav-hamburger.open span:nth-child(2) {
            opacity: 0;
        }
        .nav-hamburger.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* ============ Announcement Bar ============ */
        .announcement-bar {
            background: var(--primary-dark);
            color: rgba(255,255,255,0.85);
            font-size: 13px;
            padding: 10px 0;
            border-bottom: 1px solid rgba(200,162,75,0.2);
        }

        .announcement-bar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
        }

        .announcement-bar-left {
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 500;
        }

        .announcement-bar-left .dot {
            width: 8px;
            height: 8px;
            background: var(--accent);
            border-radius: 50%;
            flex-shrink: 0;
            animation: pulse 2s infinite;
        }

        @keyframes pulse {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.4; }
        }

        .announcement-bar-right a {
            color: var(--accent);
            font-weight: 600;
            letter-spacing: 0.2px;
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }

        .announcement-bar-right a:hover {
            color: #fff;
            text-decoration: underline;
        }

        /* ============ Hero Section ============ */
        .hero {
            background: linear-gradient(180deg, var(--primary) 0%, var(--primary-light) 100%);
            padding: 72px 0 80px;
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: -120px;
            right: -80px;
            width: 420px;
            height: 420px;
            background: radial-gradient(circle, rgba(200,162,75,0.14) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero::after {
            content: '';
            position: absolute;
            bottom: -140px;
            left: -60px;
            width: 360px;
            height: 360px;
            background: radial-gradient(circle, rgba(200,162,75,0.10) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero .container {
            display: flex;
            align-items: center;
            gap: 48px;
            position: relative;
            z-index: 1;
        }

        .hero-content {
            flex: 0 0 55%;
            max-width: 55%;
        }

        .hero-tags {
            display: flex;
            gap: 10px;
            margin-bottom: 20px;
            flex-wrap: wrap;
        }

        .hero-tag {
            display: inline-block;
            padding: 5px 14px;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.3px;
            border-radius: 20px;
            background: rgba(200,162,75,0.15);
            color: var(--accent);
            border: 1px solid rgba(200,162,75,0.3);
        }

        .hero h1 {
            font-size: 32px;
            font-weight: 700;
            line-height: 1.35;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }

        .hero-subtitle {
            font-size: 15.5px;
            line-height: 1.85;
            color: rgba(255,255,255,0.78);
            margin-bottom: 28px;
            max-width: 520px;
        }

        .hero-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
            align-items: center;
        }

        .hero-actions .btn-primary {
            background: var(--accent);
            color: var(--primary-dark);
            font-weight: 700;
            padding: 14px 28px;
            font-size: 15.5px;
            border-radius: 10px;
        }

        .hero-actions .btn-secondary {
            background: rgba(255,255,255,0.08);
            color: #fff;
            border-color: rgba(255,255,255,0.35);
        }

        .hero-actions .btn-secondary:hover {
            background: rgba(255,255,255,0.18);
            border-color: rgba(255,255,255,0.5);
            box-shadow: none;
        }

        .hero-image {
            flex: 0 0 45%;
            max-width: 45%;
            display: flex;
            justify-content: center;
            align-items: center;
        }

        .hero-image-inner {
            width: 100%;
            max-width: 420px;
            aspect-ratio: 1 / 1.05;
            background: var(--card-bg);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: 0 20px 48px rgba(0,0,0,0.3);
            position: relative;
            border: 3px solid rgba(200,162,75,0.25);
        }

        .hero-image-inner img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            display: block;
        }

        .hero-image-badge {
            position: absolute;
            bottom: 14px;
            left: 14px;
            background: rgba(14,46,42,0.85);
            color: #fff;
            padding: 6px 14px;
            border-radius: 6px;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.3px;
            backdrop-filter: blur(4px);
        }

        /* ============ Generic Section Styles ============ */
        .section {
            padding: var(--section-padding) 0;
        }

        .section-alt {
            background: #fff;
        }

        .section-heading {
            margin-bottom: 42px;
        }

        .section-heading-center {
            text-align: center;
        }

        .section-heading h2 {
            font-size: 26px;
            font-weight: 650;
            line-height: 1.4;
            color: var(--primary-dark);
            letter-spacing: 0.2px;
            margin-bottom: 10px;
        }

        .section-heading p {
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.8;
            max-width: 640px;
            margin: 0 auto;
        }

        .section-heading-left p {
            margin: 0;
        }

        .section-heading .section-link {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 14px;
            font-weight: 600;
            color: var(--accent);
            margin-top: 8px;
        }

        .section-heading .section-link:hover {
            color: var(--primary);
            text-decoration: underline;
        }

        /* ============ Quick Download Section ============ */
        .quick-download {
            background: var(--bg);
        }

        .download-grid {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr;
            gap: 24px;
            align-items: stretch;
        }

        .download-card {
            background: var(--card-bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
            position: relative;
            overflow: hidden;
        }

        .download-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
            border-color: rgba(200,162,75,0.35);
        }

        .download-card.featured {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
            color: #fff;
            border-color: var(--primary);
        }

        .download-card.featured:hover {
            box-shadow: 0 16px 40px rgba(14,46,42,0.28);
        }

        .download-card-icon {
            width: 48px;
            height: 48px;
            background: rgba(14,46,42,0.06);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            margin-bottom: 14px;
            flex-shrink: 0;
        }

        .download-card.featured .download-card-icon {
            background: rgba(200,162,75,0.18);
        }

        .download-card h3 {
            font-size: 17px;
            font-weight: 650;
            margin-bottom: 6px;
            color: var(--primary-dark);
            line-height: 1.4;
        }

        .download-card.featured h3 {
            color: #fff;
        }

        .download-card .download-desc {
            font-size: 13.5px;
            color: var(--text-muted);
            line-height: 1.75;
            margin-bottom: 16px;
            flex-grow: 1;
        }

        .download-card.featured .download-desc {
            color: rgba(255,255,255,0.72);
        }

        .download-card .download-meta {
            display: flex;
            gap: 16px;
            font-size: 12px;
            color: var(--text-light);
            margin-bottom: 18px;
            flex-wrap: wrap;
        }

        .download-card.featured .download-meta {
            color: rgba(255,255,255,0.55);
        }

        .download-card .download-meta span {
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        .download-card .btn {
            align-self: flex-start;
        }

        .download-card.featured .btn-primary {
            background: var(--accent);
            color: var(--primary-dark);
        }

        .download-card.featured .btn-primary:hover {
            background: var(--accent-hover);
        }

        /* ============ Core Capability Cards ============ */
        .capability-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .capability-card {
            background: var(--card-bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            display: flex;
            gap: 16px;
            align-items: flex-start;
        }

        .capability-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
            border-color: rgba(14,46,42,0.18);
        }

        .capability-card-icon {
            width: 48px;
            height: 48px;
            background: rgba(14,46,42,0.05);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            flex-shrink: 0;
            color: var(--primary);
        }

        .capability-card-content h3 {
            font-size: 16.5px;
            font-weight: 650;
            color: var(--primary-dark);
            margin-bottom: 6px;
            line-height: 1.4;
        }

        .capability-card-content p {
            font-size: 13.5px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 8px;
        }

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

        .capability-card-content a:hover {
            color: var(--primary);
            text-decoration: underline;
        }

        /* ============ Steps Section ============ */
        .steps-section {
            background: #fff;
            border-top: 1px solid var(--border-light);
            border-bottom: 1px solid var(--border-light);
        }

        .steps-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
            max-width: 900px;
            margin: 0 auto;
        }

        .step-item {
            text-align: center;
            padding: 0 12px;
            position: relative;
        }

        .step-item:not(:last-child)::after {
            content: '';
            position: absolute;
            top: 32px;
            right: -32px;
            width: 48px;
            height: 2px;
            background: linear-gradient(90deg, var(--border), transparent);
        }

        .step-number {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-size: 20px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            border: 2px solid var(--accent);
        }

        .step-item h3 {
            font-size: 17px;
            font-weight: 650;
            color: var(--primary-dark);
            margin-bottom: 8px;
        }

        .step-item p {
            font-size: 13.5px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* ============ Category Entry Section ============ */
        .category-entry-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .category-entry-card {
            background: var(--card-bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 32px 26px;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
            text-align: center;
            display: flex;
            flex-direction: column;
            align-items: center;
        }

        .category-entry-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: var(--accent);
            opacity: 0;
            transition: var(--transition);
        }

        .category-entry-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
        }

        .category-entry-card:hover::before {
            opacity: 1;
        }

        .category-entry-card:nth-child(1)::before { background: var(--accent); }
        .category-entry-card:nth-child(2)::before { background: var(--success); }
        .category-entry-card:nth-child(3)::before { background: var(--risk); }

        .category-entry-icon {
            width: 56px;
            height: 56px;
            border-radius: 14px;
            background: rgba(14,46,42,0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            margin-bottom: 16px;
        }

        .category-entry-card h3 {
            font-size: 18px;
            font-weight: 650;
            color: var(--primary-dark);
            margin-bottom: 10px;
            line-height: 1.4;
        }

        .category-entry-card p {
            font-size: 13.5px;
            color: var(--text-muted);
            line-height: 1.75;
            margin-bottom: 18px;
            flex-grow: 1;
        }

        .category-entry-card .btn {
            font-size: 13.5px;
            font-weight: 600;
        }

        /* ============ Latest News / CMS List ============ */
        .latest-news {
            background: #fff;
            border-top: 1px solid var(--border-light);
        }

        .latest-news-heading {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            flex-wrap: wrap;
            margin-bottom: 36px;
        }

        .latest-news-heading h2 {
            font-size: 24px;
            font-weight: 650;
            color: var(--primary-dark);
            line-height: 1.4;
        }

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

        .news-card {
            background: var(--card-bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
            cursor: pointer;
        }

        .news-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
            border-color: rgba(14,46,42,0.18);
        }

        .news-card-thumb {
            width: 100%;
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: #E8E5DE;
            position: relative;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .news-card-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .news-card-thumb .thumb-placeholder {
            font-size: 36px;
            color: var(--border);
        }

        .news-card-body {
            padding: 18px 18px 20px;
            display: flex;
            flex-direction: column;
            flex-grow: 1;
        }

        .news-tag {
            display: inline-block;
            padding: 3px 10px;
            font-size: 11px;
            font-weight: 600;
            letter-spacing: 0.3px;
            border-radius: 4px;
            background: rgba(200,162,75,0.12);
            color: #8A6D2B;
            margin-bottom: 8px;
            align-self: flex-start;
        }

        .news-card-body h3 {
            font-size: 15px;
            font-weight: 650;
            color: var(--primary-dark);
            line-height: 1.55;
            margin-bottom: 8px;
        }

        .news-card-body .news-excerpt {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 12px;
            flex-grow: 1;
        }

        .news-card-body time {
            font-size: 12px;
            color: var(--text-light);
        }

        .empty-state {
            grid-column: 1 / -1;
            border: 2px dashed var(--border);
            border-radius: var(--radius-md);
            padding: 48px 20px;
            text-align: center;
            color: var(--text-muted);
            font-size: 14.5px;
            background: var(--card-bg);
        }

        .empty-state .empty-icon {
            font-size: 40px;
            margin-bottom: 12px;
            color: var(--border);
        }

        /* ============ Mode Description Section ============ */
        .mode-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
        }

        .mode-card {
            background: var(--card-bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 32px 26px;
            box-shadow: var(--shadow-sm);
        }

        .mode-card h3 {
            font-size: 17px;
            font-weight: 650;
            color: var(--primary-dark);
            margin-bottom: 14px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .mode-card ul {
            list-style: none;
            padding: 0;
        }

        .mode-card ul li {
            font-size: 13.5px;
            color: var(--text-muted);
            line-height: 1.75;
            padding: 8px 0 8px 22px;
            position: relative;
        }

        .mode-card ul li::before {
            content: '';
            position: absolute;
            left: 0;
            top: 14px;
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background: var(--accent);
        }

        /* ============ Compatibility Section ============ */
        .compat-section {
            background: #fff;
            border-top: 1px solid var(--border-light);
        }

        .compat-grid {
            display: grid;
            grid-template-columns: repeat(6, 1fr);
            gap: 18px;
        }

        .compat-item {
            text-align: center;
            padding: 20px 12px;
            background: var(--card-bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            transition: var(--transition);
        }

        .compat-item:hover {
            box-shadow: var(--shadow-sm);
            border-color: rgba(14,46,42,0.15);
            transform: translateY(-2px);
        }

        .compat-item-icon {
            font-size: 22px;
            margin-bottom: 8px;
            color: var(--primary);
        }

        .compat-item span {
            display: block;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary-dark);
            letter-spacing: 0.2px;
        }

        /* ============ Security Section ============ */
        .security-section {
            background: var(--primary-dark);
            color: #fff;
            padding: var(--section-padding) 0;
            position: relative;
            overflow: hidden;
        }

        .security-section::before {
            content: '';
            position: absolute;
            top: -100px;
            left: -80px;
            width: 360px;
            height: 360px;
            background: radial-gradient(circle, rgba(200,162,75,0.10) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .security-content {
            display: flex;
            align-items: center;
            gap: 48px;
            position: relative;
            z-index: 1;
        }

        .security-info {
            flex: 0 0 38%;
        }

        .security-info h2 {
            font-size: 24px;
            font-weight: 650;
            line-height: 1.45;
            color: #fff;
            margin-bottom: 12px;
        }

        .security-info p {
            font-size: 14.5px;
            color: rgba(255,255,255,0.7);
            line-height: 1.8;
        }

        .security-items {
            flex: 1;
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 16px;
        }

        .security-item {
            background: rgba(255,255,255,0.06);
            border: 1px solid rgba(200,162,75,0.2);
            border-radius: var(--radius-md);
            padding: 18px 16px;
            display: flex;
            align-items: center;
            gap: 12px;
            transition: var(--transition);
        }

        .security-item:hover {
            background: rgba(255,255,255,0.10);
            border-color: rgba(200,162,75,0.4);
        }

        .security-item-icon {
            width: 36px;
            height: 36px;
            border-radius: 8px;
            background: rgba(200,162,75,0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            flex-shrink: 0;
            color: var(--accent);
        }

        .security-item span {
            font-size: 14px;
            font-weight: 600;
            color: #fff;
            letter-spacing: 0.2px;
        }

        /* ============ Fee Section ============ */
        .fee-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .fee-card {
            background: var(--card-bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            box-shadow: var(--shadow-sm);
            text-align: center;
            transition: var(--transition);
        }

        .fee-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
        }

        .fee-card h3 {
            font-size: 16.5px;
            font-weight: 650;
            color: var(--primary-dark);
            margin-bottom: 10px;
        }

        .fee-card p {
            font-size: 13.5px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 14px;
        }

        .fee-card .fee-rule {
            font-size: 13px;
            font-weight: 600;
            color: var(--accent);
        }

        /* ============ FAQ Section ============ */
        .faq-section {
            background: #fff;
            border-top: 1px solid var(--border-light);
        }

        .faq-list {
            max-width: 780px;
            margin: 0 auto;
        }

        .faq-item {
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            background: var(--card-bg);
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-item:hover {
            border-color: rgba(14,46,42,0.2);
        }

        .faq-question {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 18px 20px;
            cursor: pointer;
            width: 100%;
            text-align: left;
            font-weight: 600;
            color: var(--primary-dark);
            font-size: 15px;
            letter-spacing: 0.2px;
            transition: var(--transition);
        }

        .faq-question .faq-number {
            width: 28px;
            height: 28px;
            border-radius: 6px;
            background: rgba(14,46,42,0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            font-weight: 700;
            color: var(--primary);
            flex-shrink: 0;
        }

        .faq-question .faq-toggle {
            margin-left: auto;
            font-size: 18px;
            color: var(--accent);
            font-weight: 700;
            flex-shrink: 0;
            transition: var(--transition);
        }

        .faq-item.open .faq-toggle {
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        .faq-answer-inner {
            padding: 0 20px 18px 62px;
            font-size: 13.5px;
            color: var(--text-muted);
            line-height: 1.85;
        }

        /* ============ Risk Disclaimer ============ */
        .risk-disclaimer {
            background: var(--risk-bg);
            border: 1px solid rgba(178,58,47,0.2);
            border-radius: var(--radius-md);
            padding: 28px 26px;
            display: flex;
            gap: 18px;
            align-items: flex-start;
            max-width: 900px;
            margin: 0 auto;
        }

        .risk-disclaimer-icon {
            width: 42px;
            height: 42px;
            border-radius: 10px;
            background: var(--risk);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            flex-shrink: 0;
        }

        .risk-disclaimer-content h3 {
            font-size: 16.5px;
            font-weight: 650;
            color: var(--risk);
            margin-bottom: 8px;
        }

        .risk-disclaimer-content p {
            font-size: 13.5px;
            color: #6B3A33;
            line-height: 1.8;
            margin-bottom: 6px;
        }

        .risk-disclaimer-content p:last-child {
            margin-bottom: 0;
        }

        /* ============ Final CTA ============ */
        .final-cta {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
            padding: 72px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .final-cta::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(200,162,75,0.10) 0%, transparent 65%);
            border-radius: 50%;
            pointer-events: none;
        }

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

        .final-cta h2 {
            font-size: 28px;
            font-weight: 700;
            color: #fff;
            line-height: 1.4;
            margin-bottom: 12px;
            letter-spacing: 0.3px;
        }

        .final-cta p {
            font-size: 15px;
            color: rgba(255,255,255,0.72);
            line-height: 1.8;
            max-width: 520px;
            margin: 0 auto 28px;
        }

        .final-cta .btn-lg {
            background: var(--accent);
            color: var(--primary-dark);
            font-weight: 700;
            padding: 16px 36px;
            font-size: 16.5px;
            border-radius: 10px;
            box-shadow: 0 8px 28px rgba(200,162,75,0.4);
        }

        .final-cta .btn-lg:hover {
            background: var(--accent-hover);
            box-shadow: 0 12px 36px rgba(200,162,75,0.5);
            transform: translateY(-2px);
        }

        /* ============ Footer ============ */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255,255,255,0.72);
            padding: 56px 0 28px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-brand .footer-logo {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.3px;
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .footer-brand .footer-logo-icon {
            width: 28px;
            height: 28px;
            background: var(--accent);
            border-radius: 6px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            font-weight: 700;
            color: var(--primary-dark);
        }

        .footer-brand p {
            font-size: 13px;
            line-height: 1.75;
            color: rgba(255,255,255,0.55);
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 650;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
        }

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

        .footer-col ul li a {
            font-size: 13px;
            color: rgba(255,255,255,0.6);
            transition: var(--transition);
        }

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

        .footer-col .footer-risk {
            font-size: 12.5px;
            line-height: 1.7;
            color: rgba(255,255,255,0.5);
            background: rgba(178,58,47,0.12);
            border-left: 3px solid var(--risk);
            padding: 10px 14px;
            border-radius: 4px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding-top: 20px;
            text-align: center;
            font-size: 12.5px;
            color: rgba(255,255,255,0.45);
            line-height: 1.7;
        }

        .footer-bottom strong {
            color: rgba(255,255,255,0.7);
            font-weight: 600;
        }

        /* ============ Responsive ============ */
        @media (max-width: 1024px) {
            :root {
                --section-padding: 56px;
                --container: 100%;
            }

            .hero .container {
                gap: 32px;
            }

            .hero-content {
                flex-basis: 52%;
                max-width: 52%;
            }

            .hero-image {
                flex-basis: 48%;
                max-width: 48%;
            }

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

            .compat-grid {
                grid-template-columns: repeat(3, 1fr);
            }

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

            .footer-grid {
                grid-template-columns: 1.5fr 1fr 1fr;
                gap: 28px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-padding: 44px;
                --header-height: 56px;
            }

            .nav-menu {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: var(--primary-dark);
                flex-direction: column;
                padding: 20px 20px 28px;
                gap: 4px;
                display: none;
                box-shadow: 0 16px 32px rgba(0,0,0,0.2);
            }

            .nav-menu.open {
                display: flex;
            }

            .nav-menu a {
                padding: 12px 8px;
                font-size: 15px;
                border-bottom: 1px solid rgba(255,255,255,0.06);
            }

            .nav-hamburger {
                display: flex;
            }

            .nav-cta .btn {
                padding: 8px 14px;
                font-size: 13px;
            }

            .hero .container {
                flex-direction: column;
            }

            .hero-content, .hero-image {
                flex: 0 0 100%;
                max-width: 100%;
            }

            .hero h1 {
                font-size: 24px;
            }

            .hero-image {
                margin-top: 16px;
            }

            .download-grid,
            .capability-grid,
            .category-entry-grid,
            .news-grid,
            .fee-grid {
                grid-template-columns: 1fr 1fr;
            }

            .steps-grid {
                grid-template-columns: 1fr;
                gap: 28px;
                max-width: 400px;
            }

            .step-item:not(:last-child)::after {
                display: none;
            }

            .mode-grid,
            .security-content {
                flex-direction: column;
            }

            .security-info {
                flex-basis: 100%;
            }

            .security-items {
                grid-template-columns: 1fr;
            }

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

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

        @media (max-width: 520px) {
            :root {
                --section-padding: 36px;
            }

            .announcement-bar {
                font-size: 12px;
            }

            .announcement-bar .container {
                flex-direction: column;
                gap: 6px;
                text-align: center;
            }

            .hero {
                padding: 48px 0 52px;
            }

            .hero h1 {
                font-size: 20px;
                line-height: 1.45;
            }

            .hero-subtitle {
                font-size: 14px;
            }

            .hero-actions {
                flex-direction: column;
                width: 100%;
            }

            .hero-actions .btn {
                width: 100%;
                justify-content: center;
            }

            .download-grid,
            .capability-grid,
            .category-entry-grid,
            .news-grid,
            .fee-grid,
            .compat-grid {
                grid-template-columns: 1fr;
            }

            .section-heading h2 {
                font-size: 21px;
            }

            .latest-news-heading {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }

            .risk-disclaimer {
                flex-direction: column;
                padding: 20px 18px;
            }

            .risk-disclaimer-icon {
                width: 36px;
                height: 36px;
                font-size: 17px;
            }

            .faq-question {
                font-size: 14px;
                padding: 14px 16px;
            }

            .faq-answer-inner {
                padding: 0 16px 14px 52px;
                font-size: 13px;
            }

            .final-cta h2 {
                font-size: 22px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }

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

/* roulang page: category1 */
:root {
            --primary: #0E2E2A;
            --primary-light: #163D37;
            --primary-dark: #08201D;
            --accent: #C8A24B;
            --accent-hover: #B08A33;
            --bg: #F4F0E8;
            --card-bg: #FDFBF7;
            --text: #1C211F;
            --text-muted: #5A625E;
            --text-light: #8A918D;
            --border: #D8DCD4;
            --border-light: #E8E5DE;
            --risk: #B23A2F;
            --risk-bg: #F9E7E4;
            --success: #4F6B58;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(14,46,42,0.06);
            --shadow-md: 0 8px 24px rgba(14,46,42,0.08);
            --shadow-lg: 0 12px 32px rgba(14,46,42,0.14);
            --container: 1180px;
            --header-height: 64px;
            --section-padding: 64px;
            --section-padding-mobile: 44px;
            --transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
            --font-family: 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
        }

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

        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.8;
            color: var(--text);
            background-color: var(--bg);
            min-height: 100vh;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            margin: 0;
            padding: 0;
        }

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

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

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

        button {
            cursor: pointer;
        }

        a:focus-visible, button:focus-visible, input:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            border-radius: 4px;
        }

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

        /* ============ Header & Navigation ============ */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: var(--primary);
            height: var(--header-height);
            display: flex;
            align-items: center;
            box-shadow: 0 2px 16px rgba(14,46,42,0.18);
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }

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

        .nav-logo-icon {
            width: 34px;
            height: 34px;
            background: var(--accent);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 17px;
            color: var(--primary-dark);
            letter-spacing: 0.5px;
            flex-shrink: 0;
        }

        .nav-logo-text {
            font-size: 17px;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.3px;
            white-space: nowrap;
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-menu a {
            color: rgba(255,255,255,0.82);
            font-size: 14.5px;
            font-weight: 500;
            letter-spacing: 0.2px;
            padding: 6px 0;
            position: relative;
            white-space: nowrap;
        }

        .nav-menu a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent);
            transition: var(--transition);
            border-radius: 1px;
        }

        .nav-menu a:hover,
        .nav-menu a.active {
            color: #fff;
        }

        .nav-menu a:hover::after,
        .nav-menu a.active::after {
            width: 100%;
        }

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

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 11px 24px;
            font-size: 14.5px;
            font-weight: 600;
            letter-spacing: 0.3px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
            white-space: nowrap;
            line-height: 1.5;
            border: none;
        }

        .btn-primary {
            background: var(--accent);
            color: var(--primary-dark);
        }

        .btn-primary:hover {
            background: var(--accent-hover);
            box-shadow: 0 4px 16px rgba(200,162,75,0.35);
            transform: translateY(-1px);
        }

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

        .btn-secondary:hover {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 16px rgba(14,46,42,0.18);
            transform: translateY(-1px);
        }

        .btn-sm {
            padding: 8px 18px;
            font-size: 13px;
        }

        .btn-lg {
            padding: 14px 32px;
            font-size: 16px;
        }

        .nav-hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: 6px;
            transition: var(--transition);
        }

        .nav-hamburger:hover {
            background: rgba(255,255,255,0.1);
        }

        .nav-hamburger span {
            display: block;
            width: 24px;
            height: 2px;
            background: #fff;
            border-radius: 1px;
            transition: var(--transition);
        }

        /* ============ Page Header ============ */
        .page-header {
            background: var(--primary-light);
            padding: 48px 0 40px;
            border-bottom: 1px solid rgba(255,255,255,0.06);
            position: relative;
            overflow: hidden;
        }

        .page-header::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 400px;
            height: 100%;
            background: linear-gradient(to left, rgba(200,162,75,0.12), transparent);
            pointer-events: none;
        }

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

        .breadcrumb-nav {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13.5px;
            color: rgba(255,255,255,0.6);
            margin-bottom: 16px;
            list-style: none;
            padding: 0;
        }

        .breadcrumb-nav a {
            color: rgba(255,255,255,0.7);
            transition: var(--transition);
        }

        .breadcrumb-nav a:hover {
            color: var(--accent);
        }

        .breadcrumb-nav .sep {
            color: rgba(255,255,255,0.35);
            font-size: 12px;
        }

        .breadcrumb-nav .current {
            color: var(--accent);
            font-weight: 500;
        }

        .page-header h1 {
            font-size: 30px;
            font-weight: 700;
            color: #fff;
            line-height: 1.25;
            margin: 0 0 10px;
            letter-spacing: 0.4px;
        }

        .page-header .page-subtitle {
            font-size: 15.5px;
            color: rgba(255,255,255,0.72);
            line-height: 1.7;
            max-width: 640px;
            margin: 0;
        }

        /* ============ Version Tabs ============ */
        .version-tabs-section {
            padding: 28px 0 0;
            background: var(--bg);
        }

        .version-tabs {
            display: inline-flex;
            gap: 4px;
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 10px;
            padding: 4px;
            box-shadow: var(--shadow-sm);
            flex-wrap: wrap;
        }

        .version-tab {
            padding: 9px 22px;
            font-size: 14px;
            font-weight: 600;
            color: var(--text-muted);
            border-radius: 7px;
            transition: var(--transition);
            white-space: nowrap;
            letter-spacing: 0.2px;
        }

        .version-tab:hover {
            color: var(--primary);
            background: rgba(14,46,42,0.06);
        }

        .version-tab.active {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 3px 10px rgba(14,46,42,0.25);
        }

        /* ============ Download Cards ============ */
        .download-cards-section {
            padding: 32px 0 var(--section-padding);
            background: var(--bg);
        }

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

        .download-card {
            background: var(--card-bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
            position: relative;
        }

        .download-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
            border-color: var(--border);
        }

        .download-card:nth-child(1) {
            grid-row: span 2;
        }

        .download-card:nth-child(4) {
            grid-column: span 2;
        }

        .download-card .card-img-wrap {
            position: relative;
            aspect-ratio: 16/9;
            overflow: hidden;
            background: var(--primary-light);
        }

        .download-card:nth-child(1) .card-img-wrap {
            aspect-ratio: 4/3;
        }

        .download-card .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }

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

        .download-card .card-badge {
            position: absolute;
            top: 12px;
            left: 12px;
            background: var(--accent);
            color: var(--primary-dark);
            font-size: 12px;
            font-weight: 700;
            padding: 4px 12px;
            border-radius: 4px;
            letter-spacing: 0.3px;
            z-index: 1;
        }

        .download-card .card-body {
            padding: 20px 22px 22px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .download-card .card-title {
            font-size: 18px;
            font-weight: 650;
            color: var(--text);
            margin: 0 0 6px;
            line-height: 1.4;
            letter-spacing: 0.2px;
        }

        .download-card .card-version {
            font-size: 13px;
            color: var(--accent);
            font-weight: 600;
            margin-bottom: 8px;
            letter-spacing: 0.3px;
        }

        .download-card .card-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 14px;
            line-height: 1.6;
        }

        .download-card .card-meta span {
            display: flex;
            align-items: center;
            gap: 4px;
        }

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

        .download-card .card-action {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
        }

        .download-card .btn-download {
            flex: 1;
            min-width: 120px;
        }

        /* ============ System Requirements ============ */
        .system-section {
            padding: var(--section-padding) 0;
            background: #fff;
            border-top: 1px solid var(--border-light);
            border-bottom: 1px solid var(--border-light);
        }

        .section-heading {
            text-align: center;
            margin-bottom: 40px;
        }

        .section-heading h2 {
            font-size: 26px;
            font-weight: 650;
            color: var(--text);
            margin: 0 0 10px;
            line-height: 1.3;
            letter-spacing: 0.3px;
        }

        .section-heading p {
            font-size: 15.5px;
            color: var(--text-muted);
            max-width: 620px;
            margin: 0 auto;
            line-height: 1.7;
        }

        .system-grid {
            display: grid;
            grid-template-columns: repeat(6, 1fr);
            gap: 16px;
        }

        .system-item {
            background: var(--bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 22px 16px;
            text-align: center;
            transition: var(--transition);
        }

        .system-item:hover {
            border-color: var(--accent);
            box-shadow: var(--shadow-sm);
            transform: translateY(-2px);
        }

        .system-item .sys-icon {
            width: 42px;
            height: 42px;
            border-radius: 50%;
            background: var(--primary);
            color: var(--accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            font-weight: 700;
            margin: 0 auto 10px;
        }

        .system-item .sys-name {
            font-size: 14px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 4px;
        }

        .system-item .sys-detail {
            font-size: 13px;
            color: var(--text-muted);
        }

        /* ============ FAQ Accordion ============ */
        .faq-section {
            padding: var(--section-padding) 0;
            background: var(--bg);
        }

        .faq-list {
            max-width: 780px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--card-bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--transition);
        }

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

        .faq-question {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 18px 22px;
            width: 100%;
            text-align: left;
            font-size: 15.5px;
            font-weight: 600;
            color: var(--text);
            transition: var(--transition);
            position: relative;
        }

        .faq-question .faq-num {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--primary);
            color: var(--accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 12px;
            font-weight: 700;
            flex-shrink: 0;
        }

        .faq-question .faq-icon {
            margin-left: auto;
            font-size: 20px;
            font-weight: 300;
            color: var(--text-light);
            transition: var(--transition);
            flex-shrink: 0;
        }

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

        .faq-answer {
            display: none;
            padding: 0 22px 20px 64px;
            font-size: 14.5px;
            color: var(--text-muted);
            line-height: 1.8;
        }

        .faq-item.open .faq-answer {
            display: block;
        }

        /* ============ Risk Banner ============ */
        .risk-banner-section {
            padding: 0 0 var(--section-padding);
            background: var(--bg);
        }

        .risk-banner {
            background: var(--risk-bg);
            border: 1px solid rgba(178,58,47,0.25);
            border-radius: var(--radius-md);
            padding: 24px 28px;
            display: flex;
            align-items: flex-start;
            gap: 16px;
        }

        .risk-banner .risk-icon {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--risk);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 700;
            flex-shrink: 0;
        }

        .risk-banner .risk-content h3 {
            font-size: 16px;
            font-weight: 650;
            color: var(--risk);
            margin: 0 0 6px;
        }

        .risk-banner .risk-content p {
            font-size: 14px;
            color: var(--text-muted);
            margin: 0;
            line-height: 1.7;
        }

        /* ============ Support Section ============ */
        .support-section {
            padding: var(--section-padding) 0;
            background: #fff;
            border-top: 1px solid var(--border-light);
        }

        .support-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }

        .support-info h2 {
            font-size: 24px;
            font-weight: 650;
            color: var(--text);
            margin: 0 0 14px;
            line-height: 1.3;
        }

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

        .support-channels {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }

        .support-channel-tag {
            background: var(--bg);
            border: 1px solid var(--border-light);
            border-radius: 6px;
            padding: 8px 16px;
            font-size: 13.5px;
            color: var(--text-muted);
            font-weight: 500;
            transition: var(--transition);
        }

        .support-channel-tag:hover {
            border-color: var(--accent);
            color: var(--primary);
        }

        .support-visual {
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            aspect-ratio: 4/3;
            position: relative;
        }

        .support-visual img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        /* ============ Return CTA ============ */
        .return-cta-section {
            padding: var(--section-padding) 0;
            background: var(--primary-dark);
            position: relative;
            overflow: hidden;
        }

        .return-cta-section::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(200,162,75,0.12), transparent 65%);
            pointer-events: none;
        }

        .return-cta-content {
            text-align: center;
            position: relative;
            z-index: 1;
        }

        .return-cta-content h2 {
            font-size: 26px;
            font-weight: 700;
            color: #fff;
            margin: 0 0 10px;
            line-height: 1.3;
        }

        .return-cta-content p {
            font-size: 15.5px;
            color: rgba(255,255,255,0.7);
            margin: 0 0 24px;
            line-height: 1.7;
        }

        .return-cta-content .btn-light {
            background: #fff;
            color: var(--primary);
            font-weight: 650;
        }

        .return-cta-content .btn-light:hover {
            background: var(--accent);
            color: var(--primary-dark);
            box-shadow: 0 4px 20px rgba(255,255,255,0.2);
            transform: translateY(-2px);
        }

        /* ============ Footer ============ */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255,255,255,0.78);
            padding: 48px 0 0;
            border-top: 1px solid rgba(255,255,255,0.08);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.4fr;
            gap: 36px;
            padding-bottom: 36px;
        }

        .footer-brand .footer-logo {
            font-size: 17px;
            font-weight: 700;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 14px;
        }

        .footer-logo-icon {
            width: 28px;
            height: 28px;
            background: var(--accent);
            border-radius: 6px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 14px;
            color: var(--primary-dark);
        }

        .footer-brand p {
            font-size: 13.5px;
            line-height: 1.75;
            color: rgba(255,255,255,0.6);
            margin: 0;
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 650;
            color: #fff;
            margin: 0 0 14px;
            letter-spacing: 0.3px;
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

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

        .footer-col ul li a {
            font-size: 13.5px;
            color: rgba(255,255,255,0.6);
            transition: var(--transition);
        }

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

        .footer-risk {
            font-size: 13px;
            color: rgba(255,255,255,0.55);
            line-height: 1.75;
            background: rgba(178,58,47,0.12);
            border: 1px solid rgba(178,58,47,0.25);
            border-radius: 8px;
            padding: 14px 16px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding: 18px 0;
            text-align: center;
            font-size: 12.5px;
            color: rgba(255,255,255,0.45);
            line-height: 1.6;
        }

        .footer-bottom p {
            margin: 0;
        }

        .footer-bottom strong {
            color: rgba(255,255,255,0.7);
            font-weight: 600;
        }

        /* ============ Responsive ============ */
        @media (max-width: 1024px) {
            :root {
                --section-padding: 52px;
                --container: 100%;
            }
            .download-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .download-card:nth-child(1) {
                grid-row: auto;
            }
            .download-card:nth-child(4) {
                grid-column: auto;
            }
            .system-grid {
                grid-template-columns: repeat(3, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1.5fr 1fr 1fr;
                gap: 24px;
            }
            .footer-brand {
                grid-column: span 3;
            }
            .support-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-padding: 44px;
                --header-height: 56px;
            }
            .nav-hamburger {
                display: flex;
            }
            .nav-menu {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: var(--primary);
                flex-direction: column;
                align-items: flex-start;
                gap: 0;
                padding: 12px 20px 20px;
                box-shadow: 0 12px 24px rgba(14,46,42,0.25);
                display: none;
                z-index: 99;
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-menu li {
                width: 100%;
            }
            .nav-menu a {
                display: block;
                padding: 12px 0;
                font-size: 15px;
                border-bottom: 1px solid rgba(255,255,255,0.08);
            }
            .nav-menu a::after {
                display: none;
            }
            .nav-menu a:hover,
            .nav-menu a.active {
                color: var(--accent);
            }
            .page-header {
                padding: 32px 0 28px;
            }
            .page-header h1 {
                font-size: 24px;
            }
            .download-grid {
                grid-template-columns: 1fr;
            }
            .system-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }
            .footer-brand {
                grid-column: auto;
            }
            .footer-col:nth-child(3),
            .footer-col:nth-child(4) {
                grid-column: auto;
            }
            .section-heading h2 {
                font-size: 22px;
            }
            .risk-banner {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
                padding: 20px;
            }
            .version-tabs {
                width: 100%;
                justify-content: center;
            }
        }

        @media (max-width: 480px) {
            :root {
                --section-padding: 36px;
            }
            .container {
                padding: 0 16px;
            }
            .page-header h1 {
                font-size: 20px;
            }
            .page-header .page-subtitle {
                font-size: 14px;
            }
            .system-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }
            .btn {
                padding: 10px 18px;
                font-size: 13.5px;
            }
            .btn-lg {
                padding: 12px 24px;
                font-size: 15px;
            }
            .download-card .card-body {
                padding: 16px 18px 18px;
            }
            .download-card .card-title {
                font-size: 16px;
            }
            .faq-question {
                padding: 14px 16px;
                font-size: 14.5px;
            }
            .faq-answer {
                padding: 0 16px 16px 54px;
                font-size: 13.5px;
            }
        }

/* roulang page: article */
:root {
            --primary: #0E2E2A;
            --primary-light: #163D37;
            --primary-dark: #08201D;
            --accent: #C8A24B;
            --accent-hover: #B08A33;
            --bg: #F4F0E8;
            --card-bg: #FDFBF7;
            --text: #1C211F;
            --text-muted: #5A625E;
            --text-light: #8A918D;
            --border: #D8DCD4;
            --border-light: #E8E5DE;
            --risk: #B23A2F;
            --risk-bg: #F9E7E4;
            --success: #4F6B58;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(14,46,42,0.06);
            --shadow-md: 0 8px 24px rgba(14,46,42,0.08);
            --shadow-lg: 0 12px 32px rgba(14,46,42,0.14);
            --container: 1180px;
            --header-height: 64px;
            --section-padding: 72px;
            --section-padding-mobile: 44px;
            --transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
            --font-family: 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
        }

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

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

        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.8;
            color: var(--text);
            background-color: var(--bg);
            min-height: 100vh;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

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

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

        button {
            cursor: pointer;
        }

        a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            border-radius: 4px;
        }

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

        /* ============ Header & Navigation ============ */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: var(--primary);
            height: var(--header-height);
            display: flex;
            align-items: center;
            box-shadow: 0 2px 16px rgba(14,46,42,0.18);
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }

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

        .nav-logo-icon {
            width: 34px;
            height: 34px;
            background: var(--accent);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 17px;
            color: var(--primary-dark);
            letter-spacing: 0.5px;
            flex-shrink: 0;
        }

        .nav-logo-text {
            font-size: 17px;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.3px;
            white-space: nowrap;
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-menu a {
            color: rgba(255,255,255,0.82);
            font-size: 14.5px;
            font-weight: 500;
            letter-spacing: 0.2px;
            padding: 6px 0;
            position: relative;
            white-space: nowrap;
            display: inline-block;
        }

        .nav-menu a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent);
            transition: var(--transition);
            border-radius: 1px;
        }

        .nav-menu a:hover,
        .nav-menu a.active {
            color: #fff;
        }

        .nav-menu a:hover::after,
        .nav-menu a.active::after {
            width: 100%;
        }

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

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 11px 24px;
            font-size: 14.5px;
            font-weight: 600;
            letter-spacing: 0.3px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
            white-space: nowrap;
            line-height: 1.5;
        }

        .btn-primary {
            background: var(--accent);
            color: var(--primary-dark);
        }

        .btn-primary:hover {
            background: var(--accent-hover);
            box-shadow: 0 4px 16px rgba(200,162,75,0.35);
            transform: translateY(-1px);
        }

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

        .btn-secondary:hover {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 16px rgba(14,46,42,0.18);
            transform: translateY(-1px);
        }

        .btn-sm {
            padding: 8px 18px;
            font-size: 13.5px;
        }

        .btn-lg {
            padding: 14px 32px;
            font-size: 16px;
        }

        .nav-hamburger {
            display: none;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            gap: 5px;
            width: 38px;
            height: 38px;
            background: rgba(255,255,255,0.08);
            border-radius: 6px;
            transition: var(--transition);
        }

        .nav-hamburger span {
            display: block;
            width: 20px;
            height: 2px;
            background: #fff;
            border-radius: 2px;
            transition: var(--transition);
        }

        .nav-hamburger:hover {
            background: rgba(255,255,255,0.16);
        }

        .nav-hamburger.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .nav-hamburger.active span:nth-child(2) {
            opacity: 0;
        }
        .nav-hamburger.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* ============ Section Base ============ */
        section {
            padding: var(--section-padding) 0;
        }

        .section-alt {
            background: #fff;
        }

        .section-deep {
            background: var(--primary);
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 600;
            color: var(--accent);
            letter-spacing: 1px;
            text-transform: uppercase;
            margin-bottom: 12px;
        }

        .section-label::before {
            content: '';
            width: 24px;
            height: 2px;
            background: var(--accent);
            border-radius: 1px;
        }

        .section-title {
            font-size: 28px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--primary-dark);
            margin-bottom: 14px;
            letter-spacing: 0.3px;
        }

        .section-subtitle {
            font-size: 15.5px;
            color: var(--text-muted);
            line-height: 1.75;
            max-width: 640px;
            margin-bottom: 36px;
        }

        .text-center {
            text-align: center;
        }

        .text-center .section-subtitle {
            margin-left: auto;
            margin-right: auto;
        }

        /* ============ Badge & Tag ============ */
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 4px 12px;
            font-size: 12px;
            font-weight: 600;
            border-radius: 20px;
            letter-spacing: 0.3px;
            line-height: 1.4;
        }

        .badge-primary {
            background: rgba(14,46,42,0.08);
            color: var(--primary);
        }

        .badge-accent {
            background: rgba(200,162,75,0.14);
            color: #8A6B28;
        }

        .badge-risk {
            background: var(--risk-bg);
            color: var(--risk);
        }

        .badge-success {
            background: rgba(79,107,88,0.12);
            color: var(--success);
        }

        .tag {
            display: inline-block;
            padding: 3px 10px;
            font-size: 12px;
            font-weight: 500;
            border-radius: 4px;
            background: rgba(14,46,42,0.06);
            color: var(--text-muted);
        }

        /* ============ Card ============ */
        .card {
            background: var(--card-bg);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-md);
            overflow: hidden;
            transition: var(--transition);
            border: 1px solid var(--border-light);
        }

        .card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
        }

        .card-body {
            padding: 22px;
        }

        .card-image {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            background: #E8E5DE;
        }

        .card-title {
            font-size: 17px;
            font-weight: 600;
            color: var(--primary-dark);
            line-height: 1.45;
            margin-bottom: 8px;
        }

        .card-text {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 12px;
        }

        .card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 12.5px;
            color: var(--text-light);
        }

        .card-link {
            font-size: 13.5px;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        .card-link:hover {
            color: var(--accent-hover);
            gap: 7px;
        }

        /* ============ Article Page Styles ============ */
        .article-page {
            padding: 40px 0 0;
        }

        .article-breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 13.5px;
            color: var(--text-light);
            margin-bottom: 20px;
        }

        .article-breadcrumb a {
            color: var(--text-muted);
            transition: var(--transition);
        }

        .article-breadcrumb a:hover {
            color: var(--accent);
        }

        .article-breadcrumb .separator {
            color: var(--text-light);
            user-select: none;
        }

        .article-breadcrumb .current {
            color: var(--text);
            font-weight: 500;
            max-width: 280px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        .article-header-card {
            background: var(--card-bg);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
            padding: 36px 40px;
            border: 1px solid var(--border-light);
            margin-bottom: 28px;
        }

        .article-badge-row {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 16px;
        }

        .article-h1 {
            font-size: 30px;
            font-weight: 700;
            color: var(--primary-dark);
            line-height: 1.35;
            letter-spacing: 0.3px;
            margin-bottom: 16px;
        }

        .article-meta-row {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
            font-size: 13.5px;
            color: var(--text-light);
        }

        .article-meta-row .meta-item {
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }

        .article-meta-row .meta-icon {
            font-size: 14px;
            color: var(--accent);
        }

        .article-summary {
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.8;
            margin-top: 16px;
            padding-top: 16px;
            border-top: 1px solid var(--border-light);
        }

        /* Reading area */
        .article-body-wrapper {
            max-width: 780px;
            margin: 0 auto;
        }

        .article-content-card {
            background: var(--card-bg);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
            padding: 40px 44px;
            border: 1px solid var(--border-light);
        }

        .article-content {
            font-size: 16px;
            line-height: 1.9;
            color: var(--text);
            word-break: break-word;
        }

        .article-content h2 {
            font-size: 22px;
            font-weight: 700;
            color: var(--primary-dark);
            margin: 32px 0 14px;
            padding-bottom: 8px;
            border-bottom: 1px solid var(--border-light);
            line-height: 1.4;
        }

        .article-content h3 {
            font-size: 19px;
            font-weight: 600;
            color: var(--primary);
            margin: 26px 0 12px;
            line-height: 1.4;
        }

        .article-content p {
            margin-bottom: 16px;
        }

        .article-content ul,
        .article-content ol {
            margin: 12px 0 18px;
            padding-left: 24px;
        }

        .article-content li {
            margin-bottom: 8px;
        }

        .article-content blockquote {
            margin: 20px 0;
            padding: 16px 20px;
            background: rgba(200,162,75,0.06);
            border-left: 3px solid var(--accent);
            border-radius: 0 8px 8px 0;
            color: var(--text-muted);
            font-size: 15px;
        }

        .article-content img {
            border-radius: var(--radius-md);
            margin: 20px 0;
            box-shadow: var(--shadow-sm);
        }

        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 20px 0;
            font-size: 14px;
        }

        .article-content table th,
        .article-content table td {
            border: 1px solid var(--border);
            padding: 10px 14px;
            text-align: left;
        }

        .article-content table th {
            background: rgba(14,46,42,0.04);
            font-weight: 600;
            color: var(--primary-dark);
        }

        .article-content code {
            background: rgba(14,46,42,0.06);
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 13.5px;
            color: var(--primary);
            font-family: 'SF Mono', 'Consolas', monospace;
        }

        .article-not-found {
            text-align: center;
            padding: 60px 20px;
        }

        .article-not-found .icon-large {
            font-size: 56px;
            margin-bottom: 16px;
            color: var(--text-light);
        }

        .article-not-found h2 {
            font-size: 22px;
            margin-bottom: 12px;
            color: var(--primary-dark);
        }

        .article-not-found p {
            color: var(--text-muted);
            margin-bottom: 20px;
        }

        /* Risk alert inside article */
        .article-risk-alert {
            display: flex;
            align-items: flex-start;
            gap: 14px;
            background: var(--risk-bg);
            border-radius: var(--radius-md);
            padding: 18px 20px;
            margin: 28px 0;
            border: 1px solid rgba(178,58,47,0.2);
        }

        .article-risk-alert .risk-icon {
            font-size: 22px;
            flex-shrink: 0;
            color: var(--risk);
        }

        .article-risk-alert .risk-text {
            font-size: 14px;
            color: #8A3A32;
            line-height: 1.7;
        }

        /* Related posts */
        .related-section {
            padding: 48px 0;
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 22px;
            margin-top: 28px;
        }

        .related-card {
            background: var(--card-bg);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-md);
            overflow: hidden;
            transition: var(--transition);
            border: 1px solid var(--border-light);
            display: flex;
            flex-direction: column;
        }

        .related-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
        }

        .related-card img {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            background: #E8E5DE;
        }

        .related-card .related-body {
            padding: 18px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .related-card .related-title {
            font-size: 15px;
            font-weight: 600;
            color: var(--primary-dark);
            line-height: 1.5;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .related-card .related-summary {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 10px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            flex: 1;
        }

        .related-card .related-meta {
            font-size: 12px;
            color: var(--text-light);
        }

        /* Return entry */
        .article-return-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
            padding: 20px 0;
            border-top: 1px solid var(--border);
            margin-top: 32px;
        }

        .article-return-row .return-left,
        .article-return-row .return-right {
            display: flex;
            align-items: center;
            gap: 18px;
        }

        .article-return-row a {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-muted);
            display: inline-flex;
            align-items: center;
            gap: 5px;
            transition: var(--transition);
        }

        .article-return-row a:hover {
            color: var(--accent);
        }

        /* Bottom download CTA */
        .article-download-cta {
            background: linear-gradient(135deg, #FDFBF7 0%, #F4F0E8 100%);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
            padding: 40px 44px;
            text-align: center;
            border: 1px solid var(--border-light);
        }

        .article-download-cta h3 {
            font-size: 24px;
            font-weight: 700;
            color: var(--primary-dark);
            margin-bottom: 10px;
            letter-spacing: 0.3px;
        }

        .article-download-cta p {
            font-size: 15px;
            color: var(--text-muted);
            margin-bottom: 22px;
        }

        /* Share / tool bar */
        .article-toolbar {
            display: flex;
            align-items: center;
            justify-content: center;
            flex-wrap: wrap;
            gap: 14px;
            padding: 22px 0 18px;
            border-top: 1px solid var(--border-light);
            margin-top: 28px;
        }

        .article-toolbar .tool-group {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .article-toolbar .tool-btn {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: var(--card-bg);
            border: 1px solid var(--border);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 15px;
            color: var(--text-muted);
            transition: var(--transition);
        }

        .article-toolbar .tool-btn:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            transform: translateY(-2px);
        }

        .article-toolbar .tool-divider {
            width: 1px;
            height: 28px;
            background: var(--border);
        }

        .article-toolbar .font-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 34px;
            height: 34px;
            border-radius: 6px;
            background: var(--card-bg);
            border: 1px solid var(--border);
            font-size: 13px;
            font-weight: 600;
            color: var(--text-muted);
            transition: var(--transition);
            cursor: pointer;
        }

        .article-toolbar .font-btn:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }

        .article-toolbar .tool-label {
            font-size: 13px;
            color: var(--text-light);
            margin-right: 4px;
        }

        /* ============ Footer ============ */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255,255,255,0.78);
            padding: 56px 0 28px;
            margin-top: 48px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 36px;
            margin-bottom: 36px;
        }

        .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
        }

        .footer-logo-icon {
            width: 32px;
            height: 32px;
            background: var(--accent);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 15px;
            color: var(--primary-dark);
        }

        .footer-brand p {
            font-size: 13.5px;
            line-height: 1.7;
            color: rgba(255,255,255,0.6);
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }

        .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .footer-col ul li {
            margin-bottom: 10px;
        }

        .footer-col ul a {
            font-size: 13.5px;
            color: rgba(255,255,255,0.68);
            transition: var(--transition);
        }

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

        .footer-risk {
            font-size: 13px;
            line-height: 1.7;
            color: rgba(255,255,255,0.6);
            background: rgba(255,255,255,0.05);
            padding: 14px 16px;
            border-radius: var(--radius-sm);
            border-left: 3px solid var(--risk);
        }

        .footer-bottom {
            padding-top: 24px;
            border-top: 1px solid rgba(255,255,255,0.1);
            text-align: center;
            font-size: 13px;
            color: rgba(255,255,255,0.5);
        }

        .footer-bottom p {
            margin-bottom: 6px;
        }

        /* ============ Responsive ============ */
        @media (max-width: 1024px) {
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }

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

            .article-header-card {
                padding: 28px 24px;
            }

            .article-content-card {
                padding: 30px 24px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-padding: 44px;
                --header-height: 56px;
            }

            .nav-hamburger {
                display: flex;
            }

            .nav-menu {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: var(--primary);
                flex-direction: column;
                gap: 0;
                padding: 16px 20px;
                transform: translateY(-110%);
                transition: var(--transition);
                box-shadow: 0 8px 24px rgba(14,46,42,0.2);
                z-index: 99;
                align-items: flex-start;
            }

            .nav-menu.open {
                transform: translateY(0);
            }

            .nav-menu li {
                width: 100%;
                margin: 0;
            }

            .nav-menu a {
                display: block;
                padding: 12px 4px;
                font-size: 15px;
                border-bottom: 1px solid rgba(255,255,255,0.08);
            }

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

            .nav-cta .btn {
                padding: 7px 14px;
                font-size: 12.5px;
            }

            .article-h1 {
                font-size: 24px;
            }

            .article-header-card {
                padding: 22px 18px;
            }

            .article-content-card {
                padding: 24px 18px;
            }

            .article-download-cta {
                padding: 28px 20px;
            }

            .article-download-cta h3 {
                font-size: 20px;
            }

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

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

        @media (max-width: 480px) {
            :root {
                --section-padding: 36px;
            }

            .nav-logo-text {
                font-size: 15px;
            }

            .nav-logo-icon {
                width: 28px;
                height: 28px;
                font-size: 14px;
            }

            .article-h1 {
                font-size: 20px;
            }

            .article-meta-row {
                gap: 10px;
                font-size: 12.5px;
            }

            .article-content {
                font-size: 15px;
            }

            .article-return-row {
                flex-direction: column;
                align-items: flex-start;
            }

            .article-toolbar {
                gap: 10px;
            }
        }

/* roulang page: category2 */
:root {
            --primary: #0E2E2A;
            --primary-light: #163D37;
            --primary-dark: #08201D;
            --accent: #C8A24B;
            --accent-hover: #B08A33;
            --bg: #F4F0E8;
            --card-bg: #FDFBF7;
            --text: #1C211F;
            --text-muted: #5A625E;
            --text-light: #8A918D;
            --border: #D8DCD4;
            --border-light: #E8E5DE;
            --risk: #B23A2F;
            --risk-bg: #F9E7E4;
            --success: #4F6B58;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(14,46,42,0.06);
            --shadow-md: 0 8px 24px rgba(14,46,42,0.08);
            --shadow-lg: 0 12px 32px rgba(14,46,42,0.14);
            --container: 1180px;
            --header-height: 64px;
            --section-padding: 72px;
            --section-padding-mobile: 44px;
            --transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
            --font-family: 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
        }

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

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

        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.8;
            color: var(--text);
            background-color: var(--bg);
            min-height: 100vh;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

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

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

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

        button {
            cursor: pointer;
        }

        a:focus-visible, button:focus-visible, input:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            border-radius: 4px;
        }

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

        /* ============ Header & Navigation ============ */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: var(--primary);
            height: var(--header-height);
            display: flex;
            align-items: center;
            box-shadow: 0 2px 16px rgba(14,46,42,0.18);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .nav-logo-icon {
            width: 34px;
            height: 34px;
            background: var(--accent);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 17px;
            color: var(--primary-dark);
            letter-spacing: 0.5px;
            flex-shrink: 0;
        }
        .nav-logo-text {
            font-size: 17px;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.3px;
            white-space: nowrap;
        }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-menu a {
            color: rgba(255,255,255,0.82);
            font-size: 14.5px;
            font-weight: 500;
            letter-spacing: 0.2px;
            padding: 6px 0;
            position: relative;
            white-space: nowrap;
            display: inline-block;
        }
        .nav-menu a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent);
            transition: var(--transition);
            border-radius: 1px;
        }
        .nav-menu a:hover,
        .nav-menu a.active {
            color: #fff;
        }
        .nav-menu a:hover::after,
        .nav-menu a.active::after {
            width: 100%;
        }
        .nav-cta {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 11px 24px;
            font-size: 14.5px;
            font-weight: 600;
            letter-spacing: 0.3px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
            white-space: nowrap;
            line-height: 1.5;
        }
        .btn-primary {
            background: var(--accent);
            color: var(--primary-dark);
        }
        .btn-primary:hover {
            background: var(--accent-hover);
            box-shadow: 0 4px 16px rgba(200,162,75,0.35);
            transform: translateY(-1px);
            color: var(--primary-dark);
        }
        .btn-secondary {
            background: transparent;
            color: var(--primary);
            border: 1px solid var(--primary);
        }
        .btn-secondary:hover {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 16px rgba(14,46,42,0.18);
            transform: translateY(-1px);
        }
        .btn-sm {
            padding: 8px 18px;
            font-size: 13.5px;
        }
        .btn-lg {
            padding: 14px 32px;
            font-size: 16px;
        }
        .nav-hamburger {
            display: none;
            flex-direction: column;
            gap: 4px;
            padding: 8px;
            border-radius: 6px;
            background: rgba(255,255,255,0.08);
        }
        .nav-hamburger span {
            display: block;
            width: 22px;
            height: 2px;
            background: #fff;
            border-radius: 1px;
            transition: var(--transition);
        }

        /* ============ Footer ============ */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255,255,255,0.75);
            padding: 56px 0 0;
            margin-top: 0;
        }
        .site-footer .container {
            padding-bottom: 32px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
            gap: 36px;
            align-items: start;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.75;
            color: rgba(255,255,255,0.6);
            margin-top: 14px;
            max-width: 300px;
        }
        .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 16px;
            font-weight: 700;
            color: #fff;
        }
        .footer-logo-icon {
            width: 30px;
            height: 30px;
            background: var(--accent);
            border-radius: 7px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            color: var(--primary-dark);
            font-weight: 700;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 650;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }
        .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul a {
            color: rgba(255,255,255,0.62);
            font-size: 14px;
            transition: var(--transition);
        }
        .footer-col ul a:hover {
            color: var(--accent);
        }
        .footer-risk {
            font-size: 13px;
            line-height: 1.7;
            color: rgba(255,255,255,0.55);
            background: rgba(255,255,255,0.04);
            padding: 14px 16px;
            border-radius: var(--radius-sm);
            border-left: 3px solid var(--risk);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding: 18px 0;
            text-align: center;
            font-size: 13px;
            color: rgba(255,255,255,0.45);
        }
        .footer-bottom strong {
            color: #fff;
        }
        .footer-bottom p {
            margin: 2px 0;
        }

        /* ============ Category Page Specific ============ */
        .category-banner {
            background: var(--primary);
            padding: 36px 0 32px;
            color: #fff;
        }
        .category-banner .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
        }
        .category-banner h1 {
            font-size: 28px;
            font-weight: 700;
            color: #fff;
            margin: 0;
            letter-spacing: 0.5px;
        }
        .category-breadcrumb {
            font-size: 13px;
            color: rgba(255,255,255,0.6);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .category-breadcrumb a {
            color: rgba(255,255,255,0.6);
        }
        .category-breadcrumb a:hover {
            color: var(--accent);
        }
        .category-breadcrumb .sep {
            color: rgba(255,255,255,0.3);
        }
        .category-breadcrumb .current {
            color: #fff;
        }

        .section {
            padding: var(--section-padding) 0;
        }
        .section-alt {
            background: #fff;
        }
        .section-dark {
            background: var(--primary);
            color: #fff;
        }
        .section-header {
            margin-bottom: 40px;
            text-align: center;
        }
        .section-header h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--primary);
            margin: 0 0 10px;
            letter-spacing: 0.3px;
        }
        .section-dark .section-header h2 {
            color: #fff;
        }
        .section-header p {
            font-size: 15px;
            color: var(--text-muted);
            max-width: 620px;
            margin: 0 auto;
            line-height: 1.8;
        }
        .section-dark .section-header p {
            color: rgba(255,255,255,0.65);
        }

        /* Tutorial Cards */
        .tutorial-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .tutorial-card {
            background: var(--card-bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 26px 28px;
            display: flex;
            gap: 20px;
            align-items: flex-start;
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .tutorial-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
            border-color: var(--accent);
        }
        .tutorial-card-icon {
            width: 52px;
            height: 52px;
            border-radius: 12px;
            background: rgba(14,46,42,0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            flex-shrink: 0;
            color: var(--primary);
        }
        .tutorial-card-body {
            flex: 1;
        }
        .tutorial-card-body h3 {
            font-size: 18px;
            font-weight: 650;
            color: var(--primary);
            margin: 0 0 8px;
        }
        .tutorial-card-body p {
            font-size: 14px;
            color: var(--text-muted);
            margin: 0 0 12px;
            line-height: 1.7;
        }
        .tutorial-card-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 8px;
        }
        .difficulty-tag {
            display: inline-block;
            padding: 3px 12px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.3px;
        }
        .difficulty-beginner {
            background: #E8F0EA;
            color: var(--success);
        }
        .difficulty-intermediate {
            background: #FDF3DD;
            color: #A67C1B;
        }
        .difficulty-advanced {
            background: #F9E7E4;
            color: var(--risk);
        }
        .tutorial-link {
            font-size: 13.5px;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .tutorial-link:hover {
            color: var(--accent-hover);
        }
        .tutorial-link .arrow {
            font-size: 16px;
            transition: var(--transition);
        }
        .tutorial-link:hover .arrow {
            transform: translateX(4px);
        }

        /* Steps Guide */
        .steps-guide {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .step-item {
            background: var(--card-bg);
            border-radius: var(--radius-md);
            padding: 28px 24px 24px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            position: relative;
        }
        .step-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }
        .step-number {
            width: 44px;
            height: 44px;
            background: var(--primary);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            font-weight: 700;
            margin: 0 auto 16px;
            letter-spacing: 0;
        }
        .step-item h3 {
            font-size: 17px;
            font-weight: 650;
            color: var(--primary);
            margin: 0 0 10px;
        }
        .step-item p {
            font-size: 13.5px;
            color: var(--text-muted);
            line-height: 1.7;
            margin: 0;
        }
        .step-img {
            width: 100%;
            height: 140px;
            object-fit: cover;
            border-radius: var(--radius-sm);
            margin-bottom: 16px;
        }

        /* Video Placeholder */
        .video-placeholder {
            position: relative;
            width: 100%;
            max-width: 720px;
            margin: 0 auto;
            aspect-ratio: 16/9;
            background: var(--primary-light);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            border: 1px solid rgba(255,255,255,0.1);
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .video-placeholder .play-icon {
            width: 72px;
            height: 72px;
            border-radius: 50%;
            background: rgba(200,162,75,0.9);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 30px;
            color: var(--primary-dark);
            transition: var(--transition);
        }
        .video-placeholder:hover .play-icon {
            background: var(--accent);
            transform: scale(1.08);
        }
        .video-caption {
            text-align: center;
            font-size: 14px;
            color: rgba(255,255,255,0.7);
            margin-top: 16px;
        }

        /* FAQ */
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--card-bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm);
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--accent);
        }
        .faq-item summary {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 16px 20px;
            cursor: pointer;
            font-size: 15px;
            font-weight: 600;
            color: var(--primary);
            list-style: none;
            user-select: none;
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary .faq-plus {
            font-size: 20px;
            font-weight: 400;
            color: var(--accent);
            flex-shrink: 0;
            transition: var(--transition);
        }
        .faq-item[open] summary .faq-plus {
            transform: rotate(45deg);
        }
        .faq-answer {
            padding: 0 20px 18px;
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.75;
        }
        .faq-answer p {
            margin: 0;
        }

        /* Risk Banner */
        .risk-banner {
            background: var(--risk-bg);
            border: 1px solid rgba(178,58,47,0.25);
            border-radius: var(--radius-sm);
            padding: 20px 24px;
            display: flex;
            gap: 16px;
            align-items: flex-start;
            max-width: 760px;
            margin: 0 auto;
        }
        .risk-banner .risk-icon {
            font-size: 24px;
            flex-shrink: 0;
            margin-top: 2px;
        }
        .risk-banner .risk-text {
            font-size: 14px;
            color: var(--risk);
            line-height: 1.7;
        }
        .risk-banner .risk-text strong {
            font-weight: 650;
        }

        /* Contact CTA */
        .contact-cta {
            background: var(--card-bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 32px 36px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            flex-wrap: wrap;
            box-shadow: var(--shadow-sm);
        }
        .contact-cta h3 {
            font-size: 20px;
            font-weight: 650;
            color: var(--primary);
            margin: 0 0 6px;
        }
        .contact-cta p {
            font-size: 14px;
            color: var(--text-muted);
            margin: 0;
            line-height: 1.7;
        }

        /* Bottom CTA */
        .bottom-cta {
            text-align: center;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-md);
            padding: 44px 32px;
        }
        .bottom-cta h2 {
            font-size: 24px;
            font-weight: 700;
            color: #fff;
            margin: 0 0 10px;
        }
        .bottom-cta p {
            font-size: 15px;
            color: rgba(255,255,255,0.7);
            max-width: 480px;
            margin: 0 auto 24px;
            line-height: 1.7;
        }

        /* ============ Responsive ============ */
        @media (max-width: 1024px) {
            .tutorial-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }
            .steps-guide {
                grid-template-columns: 1fr;
                gap: 18px;
            }
            .step-img {
                height: 180px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-padding: 44px;
                --header-height: 56px;
            }
            .nav-menu {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: var(--primary);
                flex-direction: column;
                padding: 20px 24px;
                gap: 18px;
                align-items: flex-start;
                display: none;
                box-shadow: 0 8px 24px rgba(0,0,0,0.2);
                z-index: 99;
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-menu a {
                font-size: 16px;
            }
            .nav-hamburger {
                display: flex;
            }
            .nav-cta .btn {
                display: none;
            }
            .category-banner h1 {
                font-size: 22px;
            }
            .section-header h2 {
                font-size: 22px;
            }
            .tutorial-card {
                padding: 20px;
                flex-direction: column;
                gap: 14px;
            }
            .tutorial-card-icon {
                width: 44px;
                height: 44px;
                font-size: 20px;
            }
            .contact-cta {
                padding: 24px;
                flex-direction: column;
                text-align: center;
            }
            .bottom-cta {
                padding: 32px 20px;
            }
            .bottom-cta h2 {
                font-size: 20px;
            }
        }

        @media (max-width: 520px) {
            :root {
                --section-padding: 36px;
            }
            .container {
                padding: 0 16px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .nav-logo-text {
                font-size: 15px;
            }
            .category-banner .container {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
            .risk-banner {
                padding: 16px;
                flex-direction: column;
                gap: 10px;
            }
            .video-placeholder .play-icon {
                width: 56px;
                height: 56px;
                font-size: 22px;
            }
        }

/* roulang page: category3 */
:root {
            --primary: #0E2E2A;
            --primary-light: #163D37;
            --primary-dark: #08201D;
            --accent: #C8A24B;
            --accent-hover: #B08A33;
            --bg: #F4F0E8;
            --card-bg: #FDFBF7;
            --text: #1C211F;
            --text-muted: #5A625E;
            --text-light: #8A918D;
            --border: #D8DCD4;
            --border-light: #E8E5DE;
            --risk: #B23A2F;
            --risk-bg: #F9E7E4;
            --success: #4F6B58;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(14,46,42,0.06);
            --shadow-md: 0 8px 24px rgba(14,46,42,0.08);
            --shadow-lg: 0 12px 32px rgba(14,46,42,0.14);
            --container: 1180px;
            --header-height: 64px;
            --section-padding: 72px;
            --section-padding-mobile: 44px;
            --transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
            --font-family: 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.8;
            color: var(--text);
            background-color: var(--bg);
            min-height: 100vh;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        button, input, textarea, select {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            border: none;
            outline: none;
            background: none;
        }
        button {
            cursor: pointer;
        }
        a:focus-visible, button:focus-visible, input:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            border-radius: 4px;
        }
        ul, ol {
            list-style: none;
        }
        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 20px;
        }
        section {
            padding: var(--section-padding) 0;
        }
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 12.5px;
            font-weight: 600;
            letter-spacing: 1.5px;
            color: var(--accent);
            text-transform: uppercase;
            margin-bottom: 12px;
        }
        .section-label::before {
            content: '';
            width: 24px;
            height: 2px;
            background: var(--accent);
            border-radius: 1px;
        }
        .section-title {
            font-size: 28px;
            font-weight: 700;
            line-height: 1.35;
            color: var(--primary);
            margin-bottom: 16px;
        }
        .section-subtitle {
            font-size: 16px;
            color: var(--text-muted);
            line-height: 1.75;
            max-width: 720px;
            margin-bottom: 36px;
        }

        /* ============ Header & Navigation ============ */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: var(--primary);
            height: var(--header-height);
            display: flex;
            align-items: center;
            box-shadow: 0 2px 16px rgba(14,46,42,0.18);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .nav-logo-icon {
            width: 34px;
            height: 34px;
            background: var(--accent);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 17px;
            color: var(--primary-dark);
            letter-spacing: 0.5px;
            flex-shrink: 0;
        }
        .nav-logo-text {
            font-size: 17px;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.3px;
            white-space: nowrap;
        }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
        }
        .nav-menu a {
            color: rgba(255,255,255,0.82);
            font-size: 14.5px;
            font-weight: 500;
            letter-spacing: 0.2px;
            padding: 6px 0;
            position: relative;
            white-space: nowrap;
        }
        .nav-menu a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent);
            transition: var(--transition);
            border-radius: 1px;
        }
        .nav-menu a:hover,
        .nav-menu a.active {
            color: #fff;
        }
        .nav-menu a:hover::after,
        .nav-menu a.active::after {
            width: 100%;
        }
        .nav-cta {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 11px 24px;
            font-size: 14.5px;
            font-weight: 600;
            letter-spacing: 0.3px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
            white-space: nowrap;
            line-height: 1.5;
        }
        .btn-primary {
            background: var(--accent);
            color: var(--primary-dark);
        }
        .btn-primary:hover {
            background: var(--accent-hover);
            box-shadow: 0 4px 16px rgba(200,162,75,0.35);
            transform: translateY(-1px);
        }
        .btn-primary:active {
            transform: translateY(0);
        }
        .btn-secondary {
            background: transparent;
            color: var(--primary);
            border: 1px solid var(--primary);
        }
        .btn-secondary:hover {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 16px rgba(14,46,42,0.18);
            transform: translateY(-1px);
        }
        .btn-sm {
            padding: 8px 16px;
            font-size: 13px;
        }
        .btn-lg {
            padding: 14px 32px;
            font-size: 15.5px;
        }
        .nav-hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            background: transparent;
            border: none;
            cursor: pointer;
        }
        .nav-hamburger span {
            width: 22px;
            height: 2px;
            background: #fff;
            border-radius: 1px;
            transition: var(--transition);
        }

        /* ============ Category Page Header ============ */
        .category-hero {
            background: linear-gradient(160deg, var(--primary) 0%, var(--primary-light) 100%);
            padding: 56px 0 48px;
            color: #fff;
            border-bottom: 3px solid var(--accent);
        }
        .category-hero .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: rgba(255,255,255,0.65);
            margin-bottom: 18px;
            flex-wrap: wrap;
        }
        .category-hero .breadcrumb a {
            color: rgba(255,255,255,0.8);
        }
        .category-hero .breadcrumb a:hover {
            color: var(--accent);
        }
        .category-hero .breadcrumb .sep {
            color: rgba(255,255,255,0.4);
        }
        .category-hero h1 {
            font-size: 32px;
            font-weight: 700;
            line-height: 1.3;
            color: #fff;
            margin-bottom: 10px;
        }
        .category-hero .cat-desc {
            font-size: 15.5px;
            color: rgba(255,255,255,0.75);
            max-width: 720px;
            line-height: 1.75;
        }

        /* ============ Security Notice List ============ */
        .notice-list-section {
            background: var(--bg);
        }
        .notice-list-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }
        .notice-item {
            background: var(--card-bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 24px;
            display: flex;
            gap: 16px;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }
        .notice-item:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
            border-color: var(--accent);
        }
        .notice-icon {
            width: 48px;
            height: 48px;
            background: var(--risk-bg);
            color: var(--risk);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            flex-shrink: 0;
            font-weight: 700;
        }
        .notice-content {
            flex: 1;
            min-width: 0;
        }
        .notice-tag {
            display: inline-block;
            font-size: 11.5px;
            font-weight: 600;
            color: var(--accent);
            letter-spacing: 0.5px;
            margin-bottom: 6px;
        }
        .notice-content h3 {
            font-size: 17px;
            font-weight: 650;
            line-height: 1.45;
            margin-bottom: 8px;
            color: var(--primary);
        }
        .notice-content h3 a:hover {
            color: var(--accent);
        }
        .notice-summary {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 10px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .notice-meta {
            font-size: 12.5px;
            color: var(--text-light);
        }
        .notice-empty {
            grid-column: 1 / -1;
            background: var(--card-bg);
            border: 1.5px dashed var(--border);
            border-radius: var(--radius-md);
            padding: 48px 24px;
            text-align: center;
            color: var(--text-muted);
        }

        /* ============ News Cards ============ */
        .news-cards-section {
            background: #fff;
        }
        .news-cards-header {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            margin-bottom: 28px;
            flex-wrap: wrap;
            gap: 12px;
        }
        .news-cards-header .left {
            flex: 1;
        }
        .news-cards-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .news-card {
            background: var(--card-bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .news-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
        }
        .news-card-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
        }
        .news-card-body {
            padding: 18px 20px 20px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .news-card-tag {
            font-size: 11.5px;
            font-weight: 600;
            color: var(--accent);
            letter-spacing: 0.5px;
            margin-bottom: 8px;
        }
        .news-card-title {
            font-size: 16px;
            font-weight: 650;
            line-height: 1.45;
            margin-bottom: 8px;
            color: var(--primary);
        }
        .news-card-title a:hover {
            color: var(--accent);
        }
        .news-card-summary {
            font-size: 13.5px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 14px;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-card-meta {
            font-size: 12px;
            color: var(--text-light);
            padding-top: 10px;
            border-top: 1px solid var(--border-light);
        }
        .news-empty {
            grid-column: 1 / -1;
            background: var(--card-bg);
            border: 1.5px dashed var(--border);
            border-radius: var(--radius-md);
            padding: 48px 24px;
            text-align: center;
            color: var(--text-muted);
        }

        /* ============ Version Timeline ============ */
        .timeline-section {
            background: var(--bg);
        }
        .timeline {
            position: relative;
            padding-left: 28px;
        }
        .timeline::before {
            content: '';
            position: absolute;
            left: 8px;
            top: 4px;
            bottom: 4px;
            width: 2px;
            background: var(--border);
            border-radius: 1px;
        }
        .timeline-item {
            position: relative;
            padding-bottom: 28px;
            padding-left: 20px;
        }
        .timeline-item:last-child {
            padding-bottom: 0;
        }
        .timeline-item::before {
            content: '';
            position: absolute;
            left: -24px;
            top: 6px;
            width: 12px;
            height: 12px;
            background: var(--accent);
            border-radius: 50%;
            border: 2px solid #fff;
            box-shadow: 0 0 0 3px var(--border);
        }
        .timeline-item .ver-badge {
            display: inline-block;
            font-size: 12px;
            font-weight: 700;
            color: var(--accent);
            letter-spacing: 0.5px;
            margin-bottom: 4px;
        }
        .timeline-item h3 {
            font-size: 16.5px;
            font-weight: 650;
            color: var(--primary);
            margin-bottom: 4px;
        }
        .timeline-item p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* ============ Risk & Safety Education ============ */
        .risk-education-section {
            background: #fff;
        }
        .risk-education-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
        }
        .risk-panel {
            background: var(--risk-bg);
            border: 1px solid rgba(178,58,47,0.18);
            border-radius: var(--radius-md);
            padding: 28px;
        }
        .risk-panel h3 {
            font-size: 19px;
            font-weight: 700;
            color: var(--risk);
            margin-bottom: 14px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .risk-panel p {
            font-size: 14.5px;
            color: #4A3633;
            line-height: 1.8;
            margin-bottom: 10px;
        }
        .risk-panel p:last-child {
            margin-bottom: 0;
        }
        .checklist-panel {
            background: var(--card-bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 28px;
            box-shadow: var(--shadow-sm);
        }
        .checklist-panel h3 {
            font-size: 19px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 14px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .checklist {
            list-style: none;
        }
        .checklist li {
            font-size: 14.5px;
            color: var(--text-muted);
            line-height: 1.7;
            padding: 8px 0;
            border-bottom: 1px solid var(--border-light);
            display: flex;
            align-items: flex-start;
            gap: 10px;
        }
        .checklist li:last-child {
            border-bottom: none;
        }
        .checklist li::before {
            content: '✓';
            width: 22px;
            height: 22px;
            background: var(--success);
            color: #fff;
            border-radius: 50%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 12px;
            flex-shrink: 0;
            margin-top: 3px;
        }

        /* ============ Compliance ============ */
        .compliance-section {
            background: var(--bg);
        }
        .compliance-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .compliance-item {
            background: var(--card-bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 24px 20px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }
        .compliance-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .compliance-icon {
            width: 48px;
            height: 48px;
            background: rgba(200,162,75,0.12);
            color: var(--accent);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            margin: 0 auto 10px;
            font-weight: 700;
        }
        .compliance-item h4 {
            font-size: 15.5px;
            font-weight: 650;
            color: var(--primary);
            margin-bottom: 6px;
        }
        .compliance-item p {
            font-size: 13.5px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* ============ Help CTA ============ */
        .help-cta-section {
            background: var(--primary);
            padding: 48px 0;
        }
        .help-cta-card {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 20px;
        }
        .help-cta-card .info h3 {
            font-size: 22px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 6px;
        }
        .help-cta-card .info p {
            font-size: 14.5px;
            color: rgba(255,255,255,0.7);
            line-height: 1.7;
        }
        .help-cta-card .actions {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }
        .btn-light {
            background: #fff;
            color: var(--primary);
        }
        .btn-light:hover {
            background: var(--accent);
            color: var(--primary-dark);
        }
        .btn-outline-light {
            background: transparent;
            color: #fff;
            border: 1px solid rgba(255,255,255,0.4);
        }
        .btn-outline-light:hover {
            background: rgba(255,255,255,0.1);
            border-color: #fff;
        }

        /* ============ Bottom CTA ============ */
        .bottom-cta-section {
            background: var(--bg);
            padding: 56px 0 72px;
        }
        .bottom-cta-card {
            background: linear-gradient(140deg, var(--primary) 0%, var(--primary-light) 60%, var(--primary-dark) 100%);
            border-radius: var(--radius-lg);
            padding: 48px 40px;
            text-align: center;
            box-shadow: var(--shadow-lg);
            position: relative;
            overflow: hidden;
        }
        .bottom-cta-card::before {
            content: '';
            position: absolute;
            top: -40%;
            right: -10%;
            width: 320px;
            height: 320px;
            background: rgba(200,162,75,0.12);
            border-radius: 50%;
            pointer-events: none;
        }
        .bottom-cta-card h3 {
            font-size: 24px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
            position: relative;
            z-index: 1;
        }
        .bottom-cta-card p {
            font-size: 15px;
            color: rgba(255,255,255,0.72);
            line-height: 1.75;
            margin-bottom: 24px;
            position: relative;
            z-index: 1;
        }
        .bottom-cta-card .btn {
            position: relative;
            z-index: 1;
        }

        /* ============ Footer ============ */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255,255,255,0.75);
            padding: 56px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 32px;
            padding-bottom: 36px;
            border-bottom: 1px solid rgba(255,255,255,0.1);
        }
        .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 17px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
        }
        .footer-logo-icon {
            width: 32px;
            height: 32px;
            background: var(--accent);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 16px;
            color: var(--primary-dark);
            flex-shrink: 0;
        }
        .footer-brand p {
            font-size: 13.5px;
            line-height: 1.75;
            color: rgba(255,255,255,0.6);
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 14.5px;
            font-weight: 650;
            color: #fff;
            letter-spacing: 0.5px;
            margin-bottom: 14px;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul li a {
            font-size: 13.5px;
            color: rgba(255,255,255,0.65);
            transition: var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--accent);
        }
        .footer-risk {
            font-size: 13px;
            color: rgba(255,255,255,0.55);
            line-height: 1.75;
            background: rgba(178,58,47,0.18);
            border: 1px solid rgba(178,58,47,0.3);
            border-radius: var(--radius-sm);
            padding: 12px 14px;
        }
        .footer-bottom {
            padding: 20px 0;
            text-align: center;
            font-size: 12.5px;
            color: rgba(255,255,255,0.5);
            line-height: 1.7;
        }
        .footer-bottom strong {
            color: rgba(255,255,255,0.8);
        }

        /* ============ Mobile Nav ============ */
        .nav-hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            background: transparent;
            border: none;
            cursor: pointer;
        }
        .nav-hamburger span {
            width: 22px;
            height: 2px;
            background: #fff;
            border-radius: 1px;
            transition: var(--transition);
        }
        .nav-hamburger.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .nav-hamburger.active span:nth-child(2) {
            opacity: 0;
        }
        .nav-hamburger.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* ============ Responsive ============ */
        @media (max-width: 1024px) {
            .container {
                padding: 0 28px;
            }
            .notice-list-grid {
                grid-template-columns: 1fr;
            }
            .news-cards-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .compliance-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .risk-education-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            :root {
                --section-padding: 44px;
                --header-height: 56px;
            }
            .container {
                padding: 0 20px;
            }
            .section-title {
                font-size: 24px;
            }
            .nav-hamburger {
                display: flex;
            }
            .nav-menu {
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: var(--primary);
                flex-direction: column;
                align-items: flex-start;
                gap: 0;
                padding: 12px 20px 20px;
                box-shadow: 0 8px 24px rgba(14,46,42,0.25);
                display: none;
                border-top: 1px solid rgba(255,255,255,0.08);
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-menu li {
                width: 100%;
            }
            .nav-menu a {
                display: block;
                padding: 10px 0;
                width: 100%;
                border-bottom: 1px solid rgba(255,255,255,0.06);
                font-size: 15px;
            }
            .nav-cta .btn {
                display: none;
            }
            .nav-cta {
                gap: 0;
            }
            .category-hero h1 {
                font-size: 26px;
            }
            .news-cards-grid {
                grid-template-columns: 1fr;
            }
            .compliance-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .help-cta-card {
                flex-direction: column;
                align-items: flex-start;
            }
            .bottom-cta-card {
                padding: 32px 24px;
            }
            .notice-item {
                padding: 18px;
                flex-direction: column;
                gap: 12px;
            }
        }
        @media (max-width: 520px) {
            :root {
                --section-padding: 36px;
            }
            .section-title {
                font-size: 21px;
            }
            .category-hero h1 {
                font-size: 22px;
            }
            .category-hero .cat-desc {
                font-size: 14px;
            }
            .news-cards-header {
                flex-direction: column;
                align-items: flex-start;
            }
            .timeline {
                padding-left: 20px;
            }
            .timeline-item {
                padding-left: 12px;
            }
        }