/* roulang page: index */
:root {
            --primary: #123033;
            --primary-dark: #0d2426;
            --primary-light: #1a4246;
            --accent: #C6A15B;
            --accent-hover: #d4b06a;
            --bg: #F6F4EF;
            --bg-alt: #EEEAE1;
            --bg-white: #ffffff;
            --highlight: #D95D39;
            --text: #1E2B2C;
            --text-secondary: #5B6663;
            --text-muted: #8A938F;
            --success: #2E7D5B;
            --error: #B5483D;
            --border: #E2DED6;
            --border-dark: rgba(255, 255, 255, 0.08);
            --radius-card: 14px;
            --radius-btn: 10px;
            --radius-input: 8px;
            --radius-badge: 999px;
            --shadow-sm: 0 8px 24px rgba(18, 48, 51, 0.08);
            --shadow-md: 0 12px 32px rgba(18, 48, 51, 0.14);
            --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            --container-max: 1200px;
            --container-padding: 24px;
            --section-padding: 64px 0;
            --transition: 0.3s ease;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-family);
            font-size: 15px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            letter-spacing: 0;
        }

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

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

        button,
        input {
            font-family: inherit;
            font-size: inherit;
        }

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

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

        /* Header & Navigation */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: var(--primary);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
        }

        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            letter-spacing: -0.01em;
            white-space: nowrap;
        }

        .site-logo .logo-mark {
            width: 36px;
            height: 36px;
            border-radius: 8px;
            background: var(--accent);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .site-logo .logo-mark svg {
            width: 20px;
            height: 20px;
            fill: var(--primary);
        }

        .site-nav {
            display: flex;
            align-items: center;
            gap: 28px;
        }

        .site-nav a {
            color: rgba(255, 255, 255, 0.82);
            font-size: 14px;
            font-weight: 500;
            padding: 4px 0;
            position: relative;
            letter-spacing: 0;
        }

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

        .site-nav a.active::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 0;
            right: 0;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
        }

        .site-nav a:not(.active)::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 50%;
            right: 50%;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
            transition: left var(--transition), right var(--transition);
        }

        .site-nav a:not(.active):hover::after {
            left: 0;
            right: 0;
        }

        .nav-cta {
            background: var(--accent);
            color: var(--primary) !important;
            padding: 8px 18px !important;
            border-radius: var(--radius-btn);
            font-weight: 600;
            transition: background var(--transition), transform var(--transition);
        }

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

        .nav-cta.active::after {
            display: none;
        }

        /* Mobile Nav Toggle */
        .nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            align-items: center;
            justify-content: center;
            background: transparent;
            border-radius: 8px;
        }

        .nav-toggle span,
        .nav-toggle span::before,
        .nav-toggle span::after {
            display: block;
            width: 22px;
            height: 2px;
            background: #fff;
            border-radius: 2px;
            position: relative;
            transition: transform var(--transition), opacity var(--transition);
        }

        .nav-toggle span::before,
        .nav-toggle span::after {
            content: '';
            position: absolute;
        }

        .nav-toggle span::before {
            top: -6px;
        }

        .nav-toggle span::after {
            bottom: -6px;
        }

        .nav-toggle.open span {
            background: transparent;
        }

        .nav-toggle.open span::before {
            top: 0;
            transform: rotate(45deg);
        }

        .nav-toggle.open span::after {
            bottom: 0;
            transform: rotate(-45deg);
        }

        .nav-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.55);
            z-index: 98;
        }

        .nav-overlay.show {
            display: block;
        }

        /* Mobile drawer */
        .mobile-drawer {
            position: fixed;
            top: 0;
            right: -300px;
            width: 280px;
            height: 100%;
            background: var(--primary);
            z-index: 99;
            padding: 20px;
            transition: right var(--transition);
            overflow-y: auto;
            display: none;
        }

        .mobile-drawer.open {
            right: 0;
        }

        .mobile-drawer .drawer-head {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 24px;
        }

        .mobile-drawer .drawer-close {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 26px;
            background: rgba(255, 255, 255, 0.08);
            border-radius: 8px;
            transition: background var(--transition);
        }

        .mobile-drawer .drawer-close:hover {
            background: rgba(255, 255, 255, 0.16);
        }

        .mobile-drawer a {
            display: block;
            padding: 12px 14px;
            color: rgba(255, 255, 255, 0.85);
            font-size: 15px;
            border-radius: 8px;
            margin-bottom: 4px;
            transition: background var(--transition);
        }

        .mobile-drawer a:hover,
        .mobile-drawer a.active {
            background: rgba(255, 255, 255, 0.08);
            color: #fff;
        }

        .mobile-drawer .drawer-cta {
            background: var(--accent);
            color: var(--primary);
            text-align: center;
            font-weight: 600;
            margin-top: 16px;
        }

        /* Hero */
        .hero {
            background: var(--primary);
            color: #fff;
            padding: 70px 0 60px;
            position: relative;
            overflow: hidden;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-image: radial-gradient(circle at 20% 40%, rgba(198, 161, 91, 0.08) 0%, transparent 60%),
                              radial-gradient(circle at 80% 70%, rgba(217, 93, 57, 0.05) 0%, transparent 50%);
            pointer-events: none;
        }

        .hero .container {
            position: relative;
            z-index: 1;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }

        .hero-content {
            max-width: 520px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(198, 161, 91, 0.16);
            color: var(--accent);
            padding: 5px 14px;
            border-radius: var(--radius-badge);
            font-size: 13px;
            font-weight: 500;
            margin-bottom: 18px;
            border: 1px solid rgba(198, 161, 91, 0.25);
        }

        .hero h1 {
            font-size: 32px;
            font-weight: 700;
            line-height: 1.25;
            letter-spacing: -0.01em;
            margin-bottom: 16px;
            color: #fff;
        }

        .hero-sub {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.75);
            line-height: 1.8;
            margin-bottom: 26px;
            max-width: 440px;
        }

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

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 600;
            transition: all var(--transition);
            letter-spacing: 0;
            white-space: nowrap;
        }

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

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

        .btn-primary:hover {
            background: var(--accent-hover);
            transform: translateY(-1px);
            box-shadow: 0 6px 18px rgba(198, 161, 91, 0.35);
        }

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

        .btn-outline:hover {
            background: rgba(198, 161, 91, 0.12);
            transform: translateY(-1px);
        }

        .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, 0.08);
            border-color: rgba(255, 255, 255, 0.6);
            transform: translateY(-1px);
        }

        .hero-visual {
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .hero-visual .device-frame {
            width: 100%;
            max-width: 480px;
            aspect-ratio: 4/3;
            background: var(--primary-light);
            border-radius: 18px;
            border: 1px solid rgba(255, 255, 255, 0.12);
            overflow: hidden;
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            box-shadow: 0 16px 40px rgba(0, 0, 0, 0.25);
        }

        .hero-visual .device-frame img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 18px;
        }

        .hero-visual .device-frame::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 40%;
            background: linear-gradient(to top, rgba(18, 48, 51, 0.4), transparent);
            pointer-events: none;
            border-radius: 18px;
        }

        /* Sections */
        section {
            padding: var(--section-padding);
        }

        .section-alt {
            background: var(--bg-alt);
        }

        .section-white {
            background: var(--bg-white);
        }

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

        .section-header {
            text-align: center;
            margin-bottom: 36px;
        }

        .section-header h2 {
            font-size: 26px;
            font-weight: 600;
            letter-spacing: -0.01em;
            color: var(--text);
            margin-bottom: 10px;
        }

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

        .section-header p {
            font-size: 15px;
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto;
            line-height: 1.8;
        }

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

        .section-tag {
            display: inline-block;
            background: rgba(198, 161, 91, 0.14);
            color: var(--accent);
            padding: 4px 12px;
            border-radius: var(--radius-badge);
            font-size: 12px;
            font-weight: 600;
            margin-bottom: 10px;
            letter-spacing: 0.04em;
        }

        .section-dark .section-tag {
            background: rgba(198, 161, 91, 0.2);
        }

        /* Quick download panel */
        .quick-download-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }

        .quick-download-card {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 20px;
            text-align: center;
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
        }

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

        .quick-download-card .qd-icon {
            width: 46px;
            height: 46px;
            margin: 0 auto 12px;
            background: rgba(18, 48, 51, 0.08);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .quick-download-card .qd-icon svg {
            width: 24px;
            height: 24px;
            fill: var(--primary);
        }

        .quick-download-card h3 {
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 4px;
            color: var(--text);
        }

        .quick-download-card .qd-version {
            font-size: 12px;
            color: var(--text-muted);
        }

        /* Version highlights */
        .version-highlight {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }

        .version-highlight .vh-image img {
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-md);
            width: 100%;
            object-fit: cover;
            aspect-ratio: 4/3;
        }

        .version-highlight .vh-content h2 {
            font-size: 24px;
            font-weight: 600;
            margin-bottom: 18px;
            letter-spacing: -0.01em;
        }

        .vh-feature-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 14px;
            margin-bottom: 18px;
        }

        .vh-feature-list li {
            display: flex;
            gap: 10px;
            align-items: flex-start;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        .vh-feature-list li::before {
            content: '';
            flex-shrink: 0;
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--accent);
            margin-top: 8px;
        }

        .text-link {
            color: var(--accent);
            font-size: 14px;
            font-weight: 500;
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: color var(--transition);
        }

        .text-link:hover {
            color: var(--accent-hover);
        }

        /* Platform matrix */
        .platform-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 18px;
        }

        .platform-card {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 24px;
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
        }

        .platform-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: var(--accent);
        }

        .platform-card .pc-head {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 14px;
        }

        .platform-card .pc-icon {
            width: 42px;
            height: 42px;
            background: rgba(18, 48, 51, 0.07);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .platform-card .pc-icon svg {
            width: 22px;
            height: 22px;
            fill: var(--primary);
        }

        .platform-card .pc-name {
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
        }

        .platform-card .pc-meta {
            font-size: 12px;
            color: var(--text-muted);
        }

        .platform-card .pc-info {
            font-size: 13px;
            color: var(--text-secondary);
            margin-bottom: 14px;
            line-height: 1.6;
        }

        .platform-card .pc-action {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .platform-card .pc-action .btn {
            padding: 8px 16px;
            font-size: 13px;
        }

        .pc-verify {
            display: flex;
            align-items: center;
            gap: 4px;
            font-size: 12px;
            color: var(--success);
            font-weight: 500;
        }

        .pc-verify svg {
            width: 14px;
            height: 14px;
            fill: var(--success);
        }

        /* Features grid */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 18px;
        }

        .feature-card {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 22px;
            transition: all var(--transition);
            position: relative;
            overflow: hidden;
        }

        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: var(--accent);
            opacity: 0;
            transition: opacity var(--transition);
        }

        .feature-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
        }

        .feature-card:hover::before {
            opacity: 1;
        }

        .feature-card .fc-icon {
            width: 36px;
            height: 36px;
            margin-bottom: 12px;
        }

        .feature-card .fc-icon svg {
            width: 30px;
            height: 30px;
            fill: var(--accent);
        }

        .feature-card h3 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--text);
        }

        .feature-card p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.65;
        }

        /* Security section */
        .security-grid {
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            gap: 40px;
            align-items: start;
        }

        .security-left h2 {
            font-size: 24px;
            font-weight: 600;
            margin-bottom: 12px;
            letter-spacing: -0.01em;
            color: var(--text);
        }

        .security-left p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
        }

        .security-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .security-item {
            display: flex;
            gap: 12px;
            align-items: flex-start;
            padding: 16px;
            background: var(--bg-white);
            border-radius: var(--radius-card);
            border: 1px solid var(--border);
        }

        .security-item .si-icon {
            width: 36px;
            height: 36px;
            background: rgba(46, 125, 91, 0.1);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .security-item .si-icon svg {
            width: 18px;
            height: 18px;
            fill: var(--success);
        }

        .security-item h4 {
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 4px;
            color: var(--text);
        }

        .security-item p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* Sync scene */
        .scene-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 18px;
        }

        .scene-card {
            background: var(--bg-white);
            border-radius: var(--radius-card);
            overflow: hidden;
            border: 1px solid var(--border);
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
        }

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

        .scene-card .scene-top {
            height: 4px;
        }

        .scene-card:nth-child(1) .scene-top {
            background: var(--accent);
        }

        .scene-card:nth-child(2) .scene-top {
            background: var(--highlight);
        }

        .scene-card:nth-child(3) .scene-top {
            background: var(--success);
        }

        .scene-card .scene-body {
            padding: 20px;
        }

        .scene-card .scene-icon {
            width: 40px;
            height: 40px;
            margin-bottom: 12px;
        }

        .scene-card .scene-icon svg {
            width: 36px;
            height: 36px;
            fill: var(--primary);
        }

        .scene-card h3 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 6px;
        }

        .scene-card p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.65;
        }

        /* Install steps */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 16px;
        }

        .step-card {
            background: var(--bg-white);
            border-radius: var(--radius-card);
            padding: 20px 16px;
            text-align: center;
            border: 1px solid var(--border);
            position: relative;
        }

        .step-card .step-number {
            font-size: 40px;
            font-weight: 700;
            color: rgba(198, 161, 91, 0.3);
            line-height: 1;
            margin-bottom: 10px;
        }

        .step-card h3 {
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 6px;
            color: var(--text);
        }

        .step-card p {
            font-size: 12px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* CMS / News */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

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

        .news-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: var(--accent);
        }

        .news-card .news-thumb {
            aspect-ratio: 16/9;
            overflow: hidden;
            background: var(--bg-alt);
            display: flex;
            align-items: center;
            justify-content: center;
        }

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

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

        .news-card .news-category {
            display: inline-block;
            background: rgba(198, 161, 91, 0.12);
            color: var(--accent);
            padding: 2px 10px;
            border-radius: var(--radius-badge);
            font-size: 12px;
            font-weight: 500;
            margin-bottom: 8px;
            width: fit-content;
        }

        .news-card h3 {
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--text);
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-card .news-excerpt {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 12px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            flex: 1;
        }

        .news-card .news-meta {
            font-size: 12px;
            color: var(--text-muted);
            display: flex;
            gap: 8px;
            align-items: center;
        }

        .news-card .news-meta .dot {
            width: 3px;
            height: 3px;
            border-radius: 50%;
            background: var(--text-muted);
        }

        .news-empty {
            text-align: center;
            padding: 40px 20px;
            color: var(--text-muted);
            font-size: 14px;
            background: var(--bg-white);
            border-radius: var(--radius-card);
            border: 1px dashed var(--border);
        }

        /* Testimonials */
        .testimonials-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 18px;
        }

        .testimonial-card {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 20px;
            box-shadow: var(--shadow-sm);
        }

        .testimonial-card .testimonial-head {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 12px;
        }

        .testimonial-card .avatar {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(18, 48, 51, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 600;
            color: var(--primary);
            font-size: 14px;
        }

        .testimonial-card .testimonial-name {
            font-size: 14px;
            font-weight: 600;
        }

        .testimonial-card .testimonial-platform {
            font-size: 12px;
            color: var(--text-muted);
        }

        .testimonial-card .stars {
            display: flex;
            gap: 2px;
            margin-bottom: 8px;
        }

        .testimonial-card .stars svg {
            width: 14px;
            height: 14px;
            fill: var(--accent);
        }

        .testimonial-card p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* FAQ */
        .faq-list {
            max-width: 720px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .faq-item {
            border: 1px solid var(--border);
            border-radius: 10px;
            background: var(--bg-white);
            overflow: hidden;
            transition: background var(--transition), border-color var(--transition);
        }

        .faq-item.open {
            background: #F0EBE2;
            border-color: var(--accent);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 16px 18px;
            cursor: pointer;
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            transition: color var(--transition);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            font-family: inherit;
        }

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

        .faq-question .faq-toggle {
            width: 24px;
            height: 24px;
            flex-shrink: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: var(--accent);
            transition: transform var(--transition);
        }

        .faq-item.open .faq-toggle {
            transform: rotate(180deg);
        }

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

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

        .faq-answer-inner {
            padding: 0 18px 16px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* Banner */
        .notice-banner {
            background: linear-gradient(135deg, #F0E8D8 0%, #E8DFC8 100%);
            border-radius: var(--radius-card);
            padding: 20px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            border: 1px solid rgba(198, 161, 91, 0.35);
            flex-wrap: wrap;
        }

        .notice-banner .nb-left {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .notice-banner .nb-icon {
            width: 36px;
            height: 36px;
            background: var(--accent);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .notice-banner .nb-icon svg {
            width: 20px;
            height: 20px;
            fill: var(--primary);
        }

        .notice-banner .nb-title {
            font-size: 15px;
            font-weight: 600;
            color: var(--primary);
        }

        .notice-banner .nb-time {
            font-size: 13px;
            color: var(--text-secondary);
        }

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

        /* CTA */
        .cta-section {
            background: var(--primary);
            color: #fff;
            text-align: center;
            padding: 60px 0;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -20%;
            width: 60%;
            height: 200%;
            background: radial-gradient(circle, rgba(198, 161, 91, 0.06) 0%, transparent 70%);
            pointer-events: none;
        }

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

        .cta-section h2 {
            font-size: 28px;
            font-weight: 700;
            letter-spacing: -0.01em;
            color: #fff;
            margin-bottom: 10px;
        }

        .cta-section p {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 24px;
        }

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

        /* System hint */
        .system-hint {
            display: flex;
            align-items: center;
            gap: 10px;
            justify-content: center;
            padding: 16px 0;
            font-size: 13px;
            color: var(--text-secondary);
            background: var(--bg-alt);
            border-bottom: 1px solid var(--border);
            flex-wrap: wrap;
        }

        .system-hint svg {
            width: 16px;
            height: 16px;
            fill: var(--text-muted);
            flex-shrink: 0;
        }

        /* Footer */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 50px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
            padding-bottom: 36px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 14px;
            letter-spacing: 0;
        }

        .footer-col a {
            display: block;
            color: rgba(255, 255, 255, 0.65);
            font-size: 13px;
            padding: 5px 0;
            transition: color var(--transition);
        }

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

        .footer-bottom {
            padding: 18px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 12px;
            color: rgba(255, 255, 255, 0.5);
            flex-wrap: wrap;
            gap: 10px;
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
            transition: color var(--transition);
        }

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

        .footer-site-name {
            font-weight: 600;
            color: rgba(255, 255, 255, 0.8);
        }

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

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

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

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

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

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

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

            .hero .container {
                grid-template-columns: 1fr;
                gap: 30px;
            }

            .hero-content {
                max-width: 100%;
            }

            .hero-visual .device-frame {
                max-width: 400px;
                margin: 0 auto;
            }

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

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

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

        @media (max-width: 768px) {
            .site-nav {
                display: none;
            }

            .nav-toggle {
                display: flex;
            }

            .mobile-drawer {
                display: block;
            }

            .hero {
                padding: 50px 0 40px;
            }

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

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

            .hero-actions {
                flex-direction: column;
                gap: 10px;
            }

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

            .quick-download-grid {
                grid-template-columns: 1fr 1fr;
            }

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

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

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

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

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

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

            .section-header h2 {
                font-size: 22px;
            }

            section {
                padding: 40px 0;
            }

            .notice-banner {
                flex-direction: column;
                align-items: flex-start;
            }

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

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

            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }

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

            .hero-visual .device-frame {
                aspect-ratio: 3/2;
            }

            .quick-download-grid {
                grid-template-columns: 1fr;
            }

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

            .security-item {
                flex-direction: column;
            }

            .notice-banner {
                padding: 16px;
            }
        }

/* roulang page: article */
:root {
            --primary: #123033;
            --primary-dark: #0d2426;
            --primary-light: #1a4246;
            --accent: #C6A15B;
            --accent-hover: #d4b06a;
            --bg: #F6F4EF;
            --bg-alt: #EEEAE1;
            --bg-white: #ffffff;
            --highlight: #D95D39;
            --text: #1E2B2C;
            --text-secondary: #5B6663;
            --text-muted: #8A938F;
            --success: #2E7D5B;
            --error: #B5483D;
            --border: #E2DED6;
            --border-dark: rgba(255, 255, 255, 0.08);
            --radius-card: 14px;
            --radius-btn: 10px;
            --radius-input: 8px;
            --radius-badge: 999px;
            --shadow-sm: 0 8px 24px rgba(18, 48, 51, 0.08);
            --shadow-md: 0 12px 32px rgba(18, 48, 51, 0.14);
            --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            --container-max: 1200px;
            --container-padding: 24px;
            --section-padding: 64px 0;
            --transition: 0.3s ease;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-family);
            font-size: 15px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            letter-spacing: 0;
        }

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

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

        button,
        input {
            font-family: inherit;
            font-size: inherit;
        }

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

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

        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: var(--primary);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
        }

        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            letter-spacing: -0.01em;
            white-space: nowrap;
        }

        .site-logo .logo-mark {
            width: 36px;
            height: 36px;
            border-radius: 8px;
            background: var(--accent);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .site-logo .logo-mark svg {
            width: 20px;
            height: 20px;
            fill: var(--primary);
        }

        .site-nav {
            display: flex;
            align-items: center;
            gap: 28px;
        }

        .site-nav a {
            color: rgba(255, 255, 255, 0.82);
            font-size: 14px;
            font-weight: 500;
            padding: 4px 0;
            position: relative;
            letter-spacing: 0;
        }

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

        .site-nav a.active::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 0;
            right: 0;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
        }

        .site-nav a:not(.active)::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 50%;
            right: 50%;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
            transition: left var(--transition), right var(--transition);
        }

        .site-nav a:not(.active):hover::after {
            left: 0;
            right: 0;
        }

        .nav-cta {
            background: var(--accent);
            color: var(--primary) !important;
            padding: 8px 18px !important;
            border-radius: var(--radius-btn);
            font-weight: 600;
            transition: background var(--transition), transform var(--transition);
        }

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

        .nav-cta.active::after {
            display: none;
        }

        .nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            align-items: center;
            justify-content: center;
            background: transparent;
            border-radius: 8px;
        }

        .nav-toggle span,
        .nav-toggle span::before,
        .nav-toggle span::after {
            display: block;
            width: 22px;
            height: 2px;
            background: #fff;
            border-radius: 2px;
            position: relative;
            transition: transform var(--transition), opacity var(--transition);
        }

        .nav-toggle span::before,
        .nav-toggle span::after {
            content: '';
            position: absolute;
        }

        .nav-toggle span::before {
            top: -6px;
        }

        .nav-toggle span::after {
            bottom: -6px;
        }

        .nav-toggle.open span {
            background: transparent;
        }

        .nav-toggle.open span::before {
            top: 0;
            transform: rotate(45deg);
        }

        .nav-toggle.open span::after {
            bottom: 0;
            transform: rotate(-45deg);
        }

        .mobile-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.5);
            z-index: 99;
            opacity: 0;
            transition: opacity var(--transition);
        }

        .mobile-overlay.show {
            opacity: 1;
        }

        .mobile-drawer {
            display: none;
            position: fixed;
            top: 0;
            right: -280px;
            width: 280px;
            height: 100vh;
            background: var(--primary);
            z-index: 101;
            padding: 20px;
            transition: right var(--transition);
            overflow-y: auto;
        }

        .mobile-drawer.open {
            right: 0;
        }

        .mobile-drawer-close {
            position: absolute;
            top: 12px;
            right: 12px;
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 28px;
            line-height: 1;
            border-radius: 8px;
            background: rgba(255, 255, 255, 0.08);
        }

        .mobile-drawer-nav {
            display: flex;
            flex-direction: column;
            gap: 4px;
            margin-top: 50px;
        }

        .mobile-drawer-nav a {
            color: rgba(255, 255, 255, 0.82);
            font-size: 15px;
            font-weight: 500;
            padding: 10px 12px;
            border-radius: 8px;
        }

        .mobile-drawer-nav a:hover,
        .mobile-drawer-nav a.active {
            background: rgba(255, 255, 255, 0.08);
            color: #fff;
        }

        .mobile-drawer-nav .nav-cta {
            background: var(--accent);
            color: var(--primary) !important;
            text-align: center;
            margin-top: 8px;
            font-weight: 600;
        }

        .article-main {
            padding: 40px 0 64px;
        }

        .breadcrumb-bar {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 24px;
            flex-wrap: wrap;
        }

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

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

        .breadcrumb-bar .separator {
            color: var(--text-muted);
            font-size: 11px;
        }

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

        .article-header {
            margin-bottom: 28px;
        }

        .article-category-tag {
            display: inline-block;
            background: var(--accent);
            color: var(--primary);
            font-size: 12px;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: var(--radius-badge);
            margin-bottom: 12px;
        }

        .article-header h1 {
            font-size: 32px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--text);
            letter-spacing: -0.01em;
            margin-bottom: 12px;
        }

        .article-excerpt {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 16px;
            max-width: 760px;
        }

        .article-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: var(--text-muted);
            flex-wrap: wrap;
        }

        .article-meta .meta-item {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .article-meta .dot-separator {
            width: 3px;
            height: 3px;
            background: var(--text-muted);
            border-radius: 50%;
            display: inline-block;
        }

        .article-body {
            max-width: 760px;
            margin: 0 auto;
            padding: 32px 0 40px;
            border-top: 1px solid var(--border);
            color: var(--text);
            font-size: 16px;
            line-height: 1.9;
        }

        .article-body h2 {
            font-size: 22px;
            font-weight: 600;
            line-height: 1.4;
            color: var(--text);
            margin: 28px 0 14px;
            letter-spacing: -0.01em;
        }

        .article-body h3 {
            font-size: 18px;
            font-weight: 600;
            line-height: 1.5;
            color: var(--text);
            margin: 22px 0 12px;
        }

        .article-body p {
            margin-bottom: 16px;
            color: var(--text);
        }

        .article-body ul,
        .article-body ol {
            margin: 0 0 16px;
            padding-left: 24px;
            color: var(--text);
        }

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

        .article-body blockquote {
            border-left: 3px solid var(--accent);
            background: var(--bg-alt);
            padding: 16px 20px;
            margin: 20px 0;
            border-radius: 0 8px 8px 0;
            color: var(--text-secondary);
            font-size: 15px;
        }

        .article-body img {
            border-radius: 12px;
            margin: 20px 0;
            box-shadow: var(--shadow-sm);
        }

        .article-cta {
            max-width: 760px;
            margin: 0 auto 40px;
            background: linear-gradient(135deg, #F0E8D8 0%, #F6F4EF 100%);
            border: 1px solid rgba(198, 161, 91, 0.35);
            border-radius: 16px;
            padding: 28px 32px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            flex-wrap: wrap;
        }

        .article-cta .cta-text {
            flex: 1;
            min-width: 200px;
        }

        .article-cta .cta-text h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 4px;
        }

        .article-cta .cta-text p {
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 0;
        }

        .btn-primary {
            display: inline-block;
            background: var(--accent);
            color: var(--primary);
            font-size: 15px;
            font-weight: 600;
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
            white-space: nowrap;
        }

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

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

        .btn-secondary {
            display: inline-block;
            border: 1px solid var(--accent);
            color: var(--primary);
            font-size: 15px;
            font-weight: 600;
            padding: 11px 28px;
            border-radius: var(--radius-btn);
            background: transparent;
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
            white-space: nowrap;
        }

        .btn-secondary:hover {
            background: #F0E8D8;
            transform: translateY(-1px);
            color: var(--primary);
        }

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

        .related-section {
            padding: 48px 0 16px;
        }

        .related-section .section-heading {
            font-size: 22px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 24px;
            letter-spacing: -0.01em;
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

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

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

        .related-card .related-card-thumb {
            width: 100%;
            height: 160px;
            overflow: hidden;
            position: relative;
            background: var(--bg-alt);
        }

        .related-card .related-card-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition);
        }

        .related-card:hover .related-card-thumb img {
            transform: scale(1.03);
        }

        .related-card .related-card-body {
            padding: 16px 18px 18px;
            display: flex;
            flex-direction: column;
            gap: 8px;
            flex: 1;
        }

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

        .related-card .related-card-excerpt {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .related-card .related-card-meta {
            font-size: 12px;
            color: var(--text-muted);
            margin-top: auto;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .article-back {
            padding: 24px 0 0;
            text-align: center;
        }

        .article-back a {
            color: var(--text-secondary);
            font-size: 14px;
            font-weight: 500;
        }

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

        .article-not-found {
            max-width: 560px;
            margin: 60px auto;
            text-align: center;
            padding: 48px 24px;
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-sm);
        }

        .article-not-found h1 {
            font-size: 24px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 12px;
        }

        .article-not-found p {
            font-size: 15px;
            color: var(--text-secondary);
            margin-bottom: 24px;
        }

        .site-footer {
            background: var(--primary-dark);
            padding: 48px 0 24px;
            color: rgba(255, 255, 255, 0.72);
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }

        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            padding-bottom: 32px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            margin-bottom: 20px;
        }

        .site-footer .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: -0.01em;
        }

        .site-footer .footer-col a {
            display: block;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.72);
            margin-bottom: 10px;
            transition: color var(--transition);
        }

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

        .site-footer .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            font-size: 12px;
            color: rgba(255, 255, 255, 0.5);
            flex-wrap: wrap;
        }

        .site-footer .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
        }

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

        .footer-site-name {
            color: rgba(255, 255, 255, 0.72);
            font-weight: 500;
        }

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

            .site-nav {
                gap: 18px;
            }

            .site-nav a {
                font-size: 13px;
            }
        }

        @media (max-width: 768px) {
            .site-nav {
                display: none;
            }

            .nav-toggle {
                display: flex;
            }

            .mobile-overlay {
                display: block;
            }

            .mobile-drawer {
                display: block;
            }

            .article-header h1 {
                font-size: 26px;
            }

            .article-body {
                font-size: 15px;
                line-height: 1.8;
            }

            .article-cta {
                padding: 22px 20px;
                flex-direction: column;
                text-align: center;
            }

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

            .site-footer .footer-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }
        }

        @media (max-width: 520px) {
            .site-header .container {
                height: 60px;
            }

            .site-logo {
                font-size: 16px;
            }

            .site-logo .logo-mark {
                width: 32px;
                height: 32px;
            }

            .article-main {
                padding: 24px 0 48px;
            }

            .article-header h1 {
                font-size: 22px;
            }

            .article-excerpt {
                font-size: 14px;
            }

            .article-body {
                padding: 24px 0 32px;
            }

            .article-body h2 {
                font-size: 19px;
            }

            .article-body h3 {
                font-size: 16px;
            }

            .article-cta .cta-text h3 {
                font-size: 16px;
            }

            .site-footer {
                padding: 32px 0 18px;
            }

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

            .site-footer .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 8px;
            }
        }

        @media (max-width: 375px) {
            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

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

            .article-meta {
                gap: 8px;
                font-size: 12px;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #123033;
            --primary-dark: #0d2426;
            --primary-light: #1a4246;
            --accent: #C6A15B;
            --accent-hover: #d4b06a;
            --bg: #F6F4EF;
            --bg-alt: #EEEAE1;
            --bg-white: #ffffff;
            --highlight: #D95D39;
            --text: #1E2B2C;
            --text-secondary: #5B6663;
            --text-muted: #8A938F;
            --success: #2E7D5B;
            --error: #B5483D;
            --border: #E2DED6;
            --border-dark: rgba(255, 255, 255, 0.08);
            --radius-card: 14px;
            --radius-btn: 10px;
            --radius-input: 8px;
            --radius-badge: 999px;
            --shadow-sm: 0 8px 24px rgba(18, 48, 51, 0.08);
            --shadow-md: 0 12px 32px rgba(18, 48, 51, 0.14);
            --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            --container-max: 1200px;
            --container-padding: 24px;
            --section-padding: 64px 0;
            --transition: 0.3s ease;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-family);
            font-size: 15px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            letter-spacing: 0;
        }

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

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

        button,
        input {
            font-family: inherit;
            font-size: inherit;
        }

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

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

        /* Header & Navigation */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: var(--primary);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
        }

        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            letter-spacing: -0.01em;
            white-space: nowrap;
        }

        .site-logo .logo-mark {
            width: 36px;
            height: 36px;
            border-radius: 8px;
            background: var(--accent);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .site-logo .logo-mark svg {
            width: 20px;
            height: 20px;
            fill: var(--primary);
        }

        .site-nav {
            display: flex;
            align-items: center;
            gap: 28px;
        }

        .site-nav a {
            color: rgba(255, 255, 255, 0.82);
            font-size: 14px;
            font-weight: 500;
            padding: 4px 0;
            position: relative;
            letter-spacing: 0;
            white-space: nowrap;
        }

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

        .site-nav a.active::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 0;
            right: 0;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
        }

        .site-nav a:not(.active)::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 50%;
            right: 50%;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
            transition: left var(--transition), right var(--transition);
        }

        .site-nav a:not(.active):hover::after {
            left: 0;
            right: 0;
        }

        .nav-cta {
            background: var(--accent);
            color: var(--primary) !important;
            padding: 8px 18px !important;
            border-radius: var(--radius-btn);
            font-weight: 600;
            transition: background var(--transition), transform var(--transition);
        }

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

        .nav-cta.active::after {
            display: none;
        }

        /* Mobile Nav Toggle */
        .nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            align-items: center;
            justify-content: center;
            background: transparent;
            border-radius: 8px;
        }

        .nav-toggle span,
        .nav-toggle span::before,
        .nav-toggle span::after {
            display: block;
            width: 22px;
            height: 2px;
            background: #fff;
            border-radius: 2px;
            position: relative;
            transition: transform var(--transition), opacity var(--transition);
        }

        .nav-toggle span::before,
        .nav-toggle span::after {
            content: '';
            position: absolute;
        }

        .nav-toggle span::before {
            top: -6px;
        }

        .nav-toggle span::after {
            bottom: -6px;
        }

        .nav-toggle.open span {
            background: transparent;
        }

        .nav-toggle.open span::before {
            top: 0;
            transform: rotate(45deg);
        }

        .nav-toggle.open span::after {
            bottom: 0;
            transform: rotate(-45deg);
        }

        /* Mobile Slide Panel */
        .mobile-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.45);
            z-index: 199;
            opacity: 0;
            transition: opacity 0.3s ease;
        }

        .mobile-overlay.show {
            opacity: 1;
        }

        .mobile-panel {
            position: fixed;
            top: 0;
            right: -300px;
            width: 280px;
            max-width: 85vw;
            height: 100vh;
            background: var(--primary);
            z-index: 200;
            padding: 72px 20px 24px;
            transition: right 0.35s ease;
            overflow-y: auto;
            box-shadow: -8px 0 32px rgba(0, 0, 0, 0.25);
        }

        .mobile-panel.open {
            right: 0;
        }

        .mobile-close {
            position: absolute;
            top: 16px;
            right: 16px;
            width: 40px;
            height: 40px;
            border-radius: 8px;
            background: rgba(255, 255, 255, 0.08);
            color: #fff;
            font-size: 22px;
            font-weight: 300;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: background var(--transition);
        }

        .mobile-close:hover {
            background: rgba(255, 255, 255, 0.16);
        }

        .mobile-panel a {
            display: block;
            color: rgba(255, 255, 255, 0.85);
            font-size: 15px;
            font-weight: 500;
            padding: 12px 16px;
            border-radius: 8px;
            margin-bottom: 4px;
            transition: background var(--transition), color var(--transition);
        }

        .mobile-panel a:hover,
        .mobile-panel a.active {
            background: rgba(255, 255, 255, 0.08);
            color: #fff;
        }

        .mobile-panel a.nav-cta {
            background: var(--accent);
            color: var(--primary);
            font-weight: 600;
            text-align: center;
            margin-top: 12px;
        }

        .mobile-panel a.nav-cta:hover {
            background: var(--accent-hover);
        }

        /* Category Hero */
        .category-hero {
            background: var(--primary);
            padding: 48px 0 56px;
            position: relative;
            overflow: hidden;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

        .category-hero::before {
            content: '';
            position: absolute;
            top: -40%;
            right: -10%;
            width: 500px;
            height: 500px;
            border-radius: 50%;
            background: rgba(198, 161, 91, 0.07);
            pointer-events: none;
        }

        .category-hero::after {
            content: '';
            position: absolute;
            bottom: -35%;
            left: -5%;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: rgba(198, 161, 91, 0.05);
            pointer-events: none;
        }

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

        .category-hero .breadcrumb-row {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.55);
            margin-bottom: 16px;
        }

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

        .category-hero .breadcrumb-row a:hover {
            color: var(--accent);
        }

        .category-hero .breadcrumb-row .sep {
            color: rgba(255, 255, 255, 0.3);
        }

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

        .category-hero h1 {
            font-size: 32px;
            font-weight: 700;
            color: #fff;
            letter-spacing: -0.01em;
            line-height: 1.3;
            margin-bottom: 14px;
        }

        .category-hero .hero-desc {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.72);
            max-width: 640px;
            line-height: 1.7;
        }

        .category-hero .hero-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
            margin-top: 24px;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }

        .category-hero .hero-meta-item {
            display: flex;
            align-items: center;
            gap: 8px;
            color: rgba(255, 255, 255, 0.65);
            font-size: 13px;
        }

        .category-hero .hero-meta-item .dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--accent);
            flex-shrink: 0;
        }

        /* Filter Tabs */
        .filter-section {
            padding: 24px 0 0;
            background: var(--bg);
        }

        .filter-tabs {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .filter-tab {
            padding: 8px 20px;
            border-radius: var(--radius-badge);
            background: var(--bg-white);
            border: 1px solid var(--border);
            color: var(--text-secondary);
            font-size: 14px;
            font-weight: 500;
            transition: all var(--transition);
        }

        .filter-tab:hover {
            border-color: var(--accent);
            color: var(--text);
        }

        .filter-tab.active {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }

        /* Download List */
        .download-list-section {
            padding: 24px 0 64px;
            background: var(--bg);
        }

        .download-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .download-item {
            display: flex;
            align-items: center;
            gap: 20px;
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 18px 22px;
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
        }

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

        .download-icon {
            width: 52px;
            height: 52px;
            border-radius: 12px;
            background: var(--bg-alt);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .download-icon svg {
            width: 26px;
            height: 26px;
            fill: var(--primary);
        }

        .download-icon.highlight-icon {
            background: rgba(198, 161, 91, 0.15);
        }

        .download-icon.highlight-icon svg {
            fill: var(--accent);
        }

        .download-info {
            flex: 1;
            min-width: 0;
        }

        .download-info .name-row {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 4px;
        }

        .download-info .name {
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
        }

        .download-info .version-tag {
            display: inline-flex;
            align-items: center;
            padding: 2px 10px;
            border-radius: var(--radius-badge);
            background: rgba(198, 161, 91, 0.12);
            color: #8a6d3b;
            font-size: 12px;
            font-weight: 500;
        }

        .download-info .version-tag.beta-tag {
            background: rgba(217, 93, 57, 0.1);
            color: var(--highlight);
        }

        .download-info .meta-row {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            font-size: 12px;
            color: var(--text-muted);
        }

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

        .download-info .meta-row .sep-dot {
            width: 3px;
            height: 3px;
            border-radius: 50%;
            background: var(--text-muted);
            align-self: center;
        }

        .download-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 9px 20px;
            border-radius: var(--radius-btn);
            background: var(--accent);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            white-space: nowrap;
            transition: all var(--transition);
        }

        .download-btn:hover {
            background: var(--accent-hover);
            transform: translateY(-1px);
        }

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

        .download-btn.secondary-btn:hover {
            border-color: var(--accent);
            color: var(--text);
            background: var(--bg-alt);
        }

        /* Version Compare */
        .compare-section {
            padding: var(--section-padding);
            background: var(--bg-alt);
        }

        .section-heading {
            margin-bottom: 28px;
        }

        .section-heading h2 {
            font-size: 24px;
            font-weight: 600;
            color: var(--text);
            letter-spacing: -0.01em;
            margin-bottom: 8px;
        }

        .section-heading p {
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 0;
        }

        .compare-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .compare-card {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 24px;
            transition: all var(--transition);
        }

        .compare-card:hover {
            border-color: var(--accent);
            box-shadow: var(--shadow-sm);
        }

        .compare-card .platform-name {
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .compare-card .platform-name .badge-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--accent);
        }

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

        .compare-card ul li {
            font-size: 13px;
            color: var(--text-secondary);
            padding: 6px 0;
            border-bottom: 1px solid var(--border);
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .compare-card ul li:last-child {
            border-bottom: none;
        }

        .compare-card ul li .label {
            color: var(--text-muted);
        }

        .compare-card ul li .value {
            font-weight: 500;
            color: var(--text);
        }

        /* Environment */
        .environment-section {
            padding: var(--section-padding);
            background: var(--bg);
        }

        .env-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .env-card {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 22px;
            display: flex;
            align-items: flex-start;
            gap: 14px;
            transition: all var(--transition);
        }

        .env-card:hover {
            border-color: var(--accent);
            box-shadow: var(--shadow-sm);
        }

        .env-card .env-icon {
            width: 44px;
            height: 44px;
            border-radius: 10px;
            background: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .env-card .env-icon svg {
            width: 22px;
            height: 22px;
            fill: var(--accent);
        }

        .env-card .env-text h4 {
            font-size: 14px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 4px;
        }

        .env-card .env-text p {
            font-size: 12px;
            color: var(--text-secondary);
            margin-bottom: 0;
            line-height: 1.6;
        }

        /* Security */
        .security-section {
            padding: var(--section-padding);
            background: var(--bg-alt);
        }

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

        .security-content h2 {
            font-size: 24px;
            font-weight: 600;
            color: var(--text);
            letter-spacing: -0.01em;
            margin-bottom: 12px;
        }

        .security-content p {
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 20px;
        }

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

        .security-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 12px 0;
            border-bottom: 1px solid var(--border);
            font-size: 13px;
            color: var(--text-secondary);
        }

        .security-list li:last-child {
            border-bottom: none;
        }

        .security-list li .check-icon {
            width: 22px;
            height: 22px;
            border-radius: 50%;
            background: rgba(46, 125, 91, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            margin-top: 1px;
        }

        .security-list li .check-icon svg {
            width: 12px;
            height: 12px;
            fill: var(--success);
        }

        .security-image {
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-md);
        }

        .security-image img {
            width: 100%;
            height: 280px;
            object-fit: cover;
        }

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

        .faq-list {
            max-width: 760px;
            margin: 0 auto;
        }

        .faq-item {
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            margin-bottom: 10px;
            background: var(--bg-white);
            overflow: hidden;
            transition: border-color var(--transition);
        }

        .faq-item.open {
            border-color: var(--accent);
            background: #F0EBE2;
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 16px 20px;
            font-size: 14px;
            font-weight: 600;
            color: var(--text);
            cursor: pointer;
            text-align: left;
            width: 100%;
            transition: background var(--transition);
        }

        .faq-question:hover {
            background: rgba(198, 161, 91, 0.05);
        }

        .faq-question .toggle-icon {
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: var(--bg-alt);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            font-size: 16px;
            font-weight: 400;
            color: var(--text-secondary);
            transition: transform var(--transition);
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
            padding: 0 20px;
        }

        .faq-item.open .faq-answer {
            max-height: 200px;
            padding: 0 20px 16px;
        }

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

        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            left: 20%;
            width: 600px;
            height: 600px;
            border-radius: 50%;
            background: rgba(198, 161, 91, 0.06);
            pointer-events: none;
        }

        .cta-section .container {
            position: relative;
            z-index: 1;
            text-align: center;
        }

        .cta-section h2 {
            font-size: 26px;
            font-weight: 700;
            color: #fff;
            letter-spacing: -0.01em;
            margin-bottom: 10px;
        }

        .cta-section p {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 24px;
        }

        .cta-buttons {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: center;
        }

        .btn-primary-large {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 32px;
            border-radius: var(--radius-btn);
            background: var(--accent);
            color: var(--primary);
            font-size: 16px;
            font-weight: 600;
            transition: all var(--transition);
        }

        .btn-primary-large:hover {
            background: var(--accent-hover);
            transform: translateY(-2px);
        }

        .btn-outline-light {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 26px;
            border-radius: var(--radius-btn);
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.3);
            color: #fff;
            font-size: 15px;
            font-weight: 500;
            transition: all var(--transition);
        }

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

        /* Footer */
        .site-footer {
            background: var(--primary-dark);
            padding: 48px 0 24px;
            color: rgba(255, 255, 255, 0.65);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            margin-bottom: 36px;
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 14px;
            letter-spacing: 0;
        }

        .footer-col a {
            display: block;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.55);
            padding: 5px 0;
            transition: color var(--transition);
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 18px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            flex-wrap: wrap;
            font-size: 12px;
            color: rgba(255, 255, 255, 0.4);
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
            transition: color var(--transition);
        }

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

        .footer-site-name {
            color: rgba(255, 255, 255, 0.7);
            font-weight: 500;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .site-nav {
                gap: 18px;
            }
            .site-nav a {
                font-size: 13px;
            }
            .compare-grid {
                grid-template-columns: repeat(3, 1fr);
                gap: 14px;
            }
            .env-grid {
                grid-template-columns: repeat(3, 1fr);
                gap: 14px;
            }
            .security-wrapper {
                gap: 28px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-padding: 40px 0;
                --container-padding: 16px;
            }
            .site-header .container {
                height: 60px;
            }
            .site-nav {
                display: none;
            }
            .nav-toggle {
                display: flex;
            }
            .mobile-overlay {
                display: block;
            }
            .mobile-panel {
                display: block;
            }
            .category-hero {
                padding: 32px 0 40px;
            }
            .category-hero h1 {
                font-size: 24px;
            }
            .download-item {
                flex-direction: column;
                align-items: stretch;
                gap: 14px;
                padding: 16px;
            }
            .download-icon {
                width: 44px;
                height: 44px;
            }
            .download-btn {
                width: 100%;
                justify-content: center;
            }
            .compare-grid {
                grid-template-columns: 1fr;
            }
            .env-grid {
                grid-template-columns: 1fr;
            }
            .security-wrapper {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .security-image img {
                height: 180px;
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }
            .cta-section h2 {
                font-size: 20px;
            }
            .filter-tabs {
                gap: 8px;
            }
            .filter-tab {
                padding: 6px 14px;
                font-size: 12px;
            }
        }

        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .category-hero .hero-meta {
                gap: 12px;
                flex-direction: column;
            }
            .download-info .meta-row {
                gap: 8px;
                flex-direction: column;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
        }

        @media (max-width: 375px) {
            .category-hero h1 {
                font-size: 20px;
            }
            .download-item {
                padding: 12px;
            }
            .download-btn {
                font-size: 12px;
                padding: 8px 14px;
            }
        }

/* roulang page: category2 */
:root {
            --primary: #123033;
            --primary-dark: #0d2426;
            --primary-light: #1a4246;
            --accent: #C6A15B;
            --accent-hover: #d4b06a;
            --bg: #F6F4EF;
            --bg-alt: #EEEAE1;
            --bg-white: #ffffff;
            --highlight: #D95D39;
            --text: #1E2B2C;
            --text-secondary: #5B6663;
            --text-muted: #8A938F;
            --success: #2E7D5B;
            --error: #B5483D;
            --border: #E2DED6;
            --border-dark: rgba(255, 255, 255, 0.08);
            --radius-card: 14px;
            --radius-btn: 10px;
            --radius-input: 8px;
            --radius-badge: 999px;
            --shadow-sm: 0 8px 24px rgba(18, 48, 51, 0.08);
            --shadow-md: 0 12px 32px rgba(18, 48, 51, 0.14);
            --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            --container-max: 1200px;
            --container-padding: 24px;
            --section-padding: 64px 0;
            --transition: 0.3s ease;
        }
html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
body {
            font-family: var(--font-family);
            font-size: 15px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            letter-spacing: 0;
        }
a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition), background var(--transition), transform var(--transition), box-shadow var(--transition), border-color var(--transition);
        }
img {
            max-width: 100%;
            height: auto;
            display: block;
        }
button,
        input {
            font-family: inherit;
            font-size: inherit;
        }
button {
            cursor: pointer;
            border: none;
            background: none;
        }
.container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 var(--container-padding);
            width: 100%;
        }
/* Header & Navigation */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: var(--primary);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
.site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
        }
.site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            letter-spacing: -0.01em;
            white-space: nowrap;
        }
.site-logo .logo-mark {
            width: 36px;
            height: 36px;
            border-radius: 8px;
            background: var(--accent);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }
.site-logo .logo-mark svg {
            width: 20px;
            height: 20px;
            fill: var(--primary);
        }
.site-nav {
            display: flex;
            align-items: center;
            gap: 28px;
        }
.site-nav a {
            color: rgba(255, 255, 255, 0.82);
            font-size: 14px;
            font-weight: 500;
            padding: 4px 0;
            position: relative;
            letter-spacing: 0;
        }
.site-nav a:hover,
        .site-nav a.active {
            color: #fff;
        }
.site-nav a.active::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 0;
            right: 0;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
        }
.site-nav a:not(.active)::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 50%;
            right: 50%;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
            transition: left var(--transition), right var(--transition);
        }
.site-nav a:not(.active):hover::after {
            left: 0;
            right: 0;
        }
.nav-cta {
            background: var(--accent);
            color: var(--primary) !important;
            padding: 8px 18px !important;
            border-radius: var(--radius-btn);
            font-weight: 600;
            transition: background var(--transition), transform var(--transition);
        }
.nav-cta:hover {
            background: var(--accent-hover);
            transform: translateY(-1px);
        }
.nav-cta.active::after {
            display: none;
        }
/* Mobile Nav Toggle */
        .nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            align-items: center;
            justify-content: center;
            background: transparent;
            border-radius: 8px;
        }
.nav-toggle span,
        .nav-toggle span::before,
        .nav-toggle span::after {
            display: block;
            width: 22px;
            height: 2px;
            background: #fff;
            border-radius: 2px;
            position: relative;
            transition: transform var(--transition), opacity var(--transition);
        }
.nav-toggle span::before,
        .nav-toggle span::after {
            content: '';
            position: absolute;
        }
.nav-toggle span::before {
            top: -6px;
        }
.nav-toggle span::after {
            bottom: -6px;
        }
.nav-toggle.open span {
            background: transparent;
        }
.nav-toggle.open span::before {
            top: 0;
            transform: rotate(45deg);
        }
.nav-toggle.open span::after {
            bottom: 0;
            transform: rotate(-45deg);
        }
/* Mobile Nav Drawer */
        .nav-overlay {
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.45);
            z-index: 149;
            opacity: 0;
            visibility: hidden;
            transition: opacity var(--transition), visibility var(--transition);
        }
.nav-overlay.active {
            opacity: 1;
            visibility: visible;
        }
.mobile-nav {
            position: fixed;
            top: 0;
            right: -300px;
            width: 280px;
            height: 100vh;
            background: var(--primary);
            z-index: 150;
            padding: 24px 20px;
            display: flex;
            flex-direction: column;
            transition: right var(--transition);
        }
.mobile-nav.open {
            right: 0;
        }
.mobile-nav-close {
            align-self: flex-end;
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 26px;
            line-height: 1;
            border-radius: 8px;
            background: rgba(255, 255, 255, 0.06);
            transition: background var(--transition);
        }
.mobile-nav-close:hover {
            background: rgba(255, 255, 255, 0.12);
        }
.mobile-nav nav {
            display: flex;
            flex-direction: column;
            gap: 4px;
            margin-top: 20px;
        }
.mobile-nav nav a {
            color: rgba(255, 255, 255, 0.82);
            font-size: 16px;
            font-weight: 500;
            padding: 12px 14px;
            border-radius: 8px;
            transition: background var(--transition), color var(--transition);
        }
.mobile-nav nav a:hover,
        .mobile-nav nav a.active {
            background: rgba(255, 255, 255, 0.08);
            color: #fff;
        }
.mobile-nav nav a.nav-cta {
            background: var(--accent);
            color: var(--primary) !important;
            font-weight: 600;
            text-align: center;
            margin-top: 12px;
        }
.mobile-nav nav a.nav-cta:hover {
            background: var(--accent-hover);
        }
/* Section Base */
        .section {
            padding: var(--section-padding);
            background: var(--bg);
        }
.section-alt {
            background: var(--bg-alt);
        }
.section-white {
            background: var(--bg-white);
        }
.section-title {
            font-size: 26px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 12px;
            letter-spacing: -0.01em;
            line-height: 1.3;
        }
.section-subtitle {
            font-size: 15px;
            color: var(--text-secondary);
            margin-bottom: 32px;
            max-width: 720px;
            line-height: 1.7;
        }
/* Breadcrumb */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 16px;
        }
.breadcrumb a {
            color: var(--accent);
            font-weight: 500;
        }
.breadcrumb a:hover {
            color: var(--accent-hover);
        }
.breadcrumb .sep {
            color: var(--text-muted);
        }
/* Category Hero */
        .category-hero {
            background: var(--primary);
            padding: 52px 0 48px;
            color: #fff;
        }
.category-hero .breadcrumb {
            color: rgba(255, 255, 255, 0.6);
        }
.category-hero .breadcrumb a {
            color: var(--accent);
        }
.category-hero h1 {
            font-size: 32px;
            font-weight: 700;
            letter-spacing: -0.01em;
            margin-bottom: 12px;
            line-height: 1.25;
        }
.category-hero p {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.82);
            max-width: 720px;
            line-height: 1.8;
            margin-bottom: 0;
        }
/* Filter Tabs */
        .filter-tabs {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
.filter-tab {
            padding: 8px 20px;
            border-radius: var(--radius-badge);
            border: 1px solid var(--border);
            background: var(--bg-white);
            color: var(--text-secondary);
            font-size: 14px;
            font-weight: 500;
            transition: background var(--transition), border-color var(--transition), color var(--transition), transform var(--transition);
        }
.filter-tab:hover {
            border-color: var(--accent);
            color: var(--text);
            transform: translateY(-1px);
        }
.filter-tab.active {
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
        }
/* Download List */
        .download-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
.download-item {
            display: flex;
            align-items: center;
            gap: 16px;
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 16px 20px;
            transition: box-shadow var(--transition), border-color var(--transition), transform var(--transition);
        }
.download-item:hover {
            box-shadow: var(--shadow-sm);
            border-color: var(--accent);
            transform: translateY(-2px);
        }
.download-item-icon {
            width: 48px;
            height: 48px;
            border-radius: 10px;
            overflow: hidden;
            flex-shrink: 0;
            border: 1px solid var(--border);
            background: var(--bg);
        }
.download-item-icon img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
.download-item-info {
            flex: 1;
            min-width: 0;
        }
.download-item-info h3 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 4px;
            color: var(--text);
            letter-spacing: -0.01em;
        }
.download-item-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 4px;
            font-size: 13px;
            color: var(--text-muted);
        }
.download-item-meta .dot {
            color: var(--text-muted);
        }
.download-item-meta .version-badge {
            display: inline-block;
            background: var(--bg-alt);
            color: var(--text-secondary);
            font-size: 12px;
            padding: 2px 8px;
            border-radius: var(--radius-badge);
            font-weight: 500;
        }
.btn-download {
            display: inline-block;
            background: var(--accent);
            color: var(--primary);
            font-weight: 600;
            font-size: 14px;
            padding: 9px 20px;
            border-radius: var(--radius-btn);
            white-space: nowrap;
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
            flex-shrink: 0;
        }
.btn-download:hover {
            background: var(--accent-hover);
            transform: translateY(-1px);
            box-shadow: var(--shadow-sm);
        }
.btn-download:focus-visible {
            outline: 2px solid var(--highlight);
            outline-offset: 2px;
        }
/* Version Compare */
        .version-compare {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            overflow: hidden;
        }
.version-compare-row {
            display: grid;
            grid-template-columns: 180px 1fr;
            border-bottom: 1px solid var(--border);
        }
.version-compare-row:last-child {
            border-bottom: none;
        }
.version-compare-row .compare-label {
            padding: 16px 20px;
            font-size: 14px;
            font-weight: 600;
            color: var(--text);
            background: var(--bg-alt);
            display: flex;
            align-items: center;
        }
.version-compare-row .compare-content {
            padding: 16px 20px;
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
        }
.compare-col .compare-platform {
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 6px;
        }
.compare-col .compare-text {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
        }
/* Env Requirements */
        .env-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
        }
.env-card {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 22px;
            transition: box-shadow var(--transition), border-color var(--transition), transform var(--transition);
        }
.env-card:hover {
            box-shadow: var(--shadow-sm);
            border-color: var(--accent);
            transform: translateY(-2px);
        }
.env-card .env-icon {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: var(--bg-alt);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 12px;
            font-size: 18px;
            font-weight: 700;
            color: var(--accent);
        }
.env-card h3 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--text);
        }
.env-card p {
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 0;
            line-height: 1.7;
        }
/* Security Check */
        .security-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
.security-item {
            display: flex;
            align-items: flex-start;
            gap: 14px;
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 18px 20px;
        }
.security-item .security-icon {
            width: 36px;
            height: 36px;
            border-radius: 8px;
            background: var(--bg-alt);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            color: var(--success);
            font-weight: 700;
            font-size: 16px;
        }
.security-item h3 {
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 4px;
            color: var(--text);
        }
.security-item p {
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 0;
            line-height: 1.6;
        }
/* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
.faq-item {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            overflow: hidden;
            transition: border-color var(--transition), box-shadow var(--transition);
        }
.faq-item:hover {
            border-color: var(--accent);
        }
.faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            padding: 16px 20px;
            cursor: pointer;
            transition: background var(--transition);
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            text-align: left;
        }
.faq-question:hover {
            background: var(--bg-alt);
        }
.faq-question .faq-toggle-icon {
            width: 24px;
            height: 24px;
            border-radius: 50%;
            border: 1px solid var(--border);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            line-height: 1;
            flex-shrink: 0;
            color: var(--text-secondary);
            transition: transform var(--transition), background var(--transition), color var(--transition);
        }
.faq-item.open .faq-toggle-icon {
            transform: rotate(45deg);
            background: var(--accent);
            border-color: var(--accent);
            color: var(--primary);
        }
.faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition), padding var(--transition);
            padding: 0 20px;
        }
.faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 20px 18px;
        }
.faq-answer p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }
.faq-item.open .faq-question {
            background: var(--bg-alt);
        }
/* CTA Section */
        .cta-section {
            background: var(--primary);
            padding: 56px 0;
            text-align: center;
            color: #fff;
        }
.cta-section h2 {
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 10px;
            letter-spacing: -0.01em;
        }
.cta-section p {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.78);
            margin-bottom: 24px;
        }
.cta-buttons {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 14px;
            flex-wrap: wrap;
        }
.btn-primary {
            display: inline-block;
            background: var(--accent);
            color: var(--primary);
            font-weight: 600;
            font-size: 15px;
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
        }
.btn-primary:hover {
            background: var(--accent-hover);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }
.btn-primary:focus-visible {
            outline: 2px solid var(--highlight);
            outline-offset: 2px;
        }
.btn-secondary {
            display: inline-block;
            background: transparent;
            color: var(--accent);
            font-weight: 600;
            font-size: 15px;
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            border: 1px solid var(--accent);
            transition: background var(--transition), color var(--transition), transform var(--transition);
        }
.btn-secondary:hover {
            background: var(--accent);
            color: var(--primary);
            transform: translateY(-2px);
        }
/* Footer */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, 0.72);
            padding: 48px 0 0;
        }
.footer-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            padding-bottom: 32px;
        }
.footer-col h4 {
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 16px;
            letter-spacing: 0;
        }
.footer-col a {
            display: block;
            color: rgba(255, 255, 255, 0.65);
            font-size: 14px;
            padding: 4px 0;
            transition: color var(--transition);
        }
.footer-col a:hover {
            color: var(--accent);
        }
.footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding: 18px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.55);
        }
.footer-bottom a {
            color: rgba(255, 255, 255, 0.65);
        }
.footer-bottom a:hover {
            color: var(--accent);
        }
.footer-site-name {
            color: var(--accent);
            font-weight: 600;
        }
/* Responsive */
        @media (max-width: 1024px) {
            .site-nav {
                gap: 18px;
            }
            .site-nav a {
                font-size: 13px;
            }
            .compare-col .compare-text {
                font-size: 12px;
            }
            .version-compare-row {
                grid-template-columns: 140px 1fr;
            }
        }
@media (max-width: 768px) {
            .site-nav {
                display: none;
            }
            .nav-toggle {
                display: flex;
            }
            .section {
                padding: 40px 0;
            }
            .category-hero {
                padding: 36px 0 32px;
            }
            .category-hero h1 {
                font-size: 26px;
            }
            .section-title {
                font-size: 22px;
            }
            .download-item {
                flex-wrap: wrap;
                gap: 12px;
                padding: 14px 16px;
            }
            .download-item-info {
                flex: 1 1 calc(100% - 64px);
                min-width: 0;
            }
            .download-item .btn-download {
                width: 100%;
                text-align: center;
            }
            .env-grid {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .version-compare-row {
                grid-template-columns: 1fr;
                border-bottom: 1px solid var(--border);
            }
            .version-compare-row .compare-label {
                border-bottom: 1px solid var(--border);
                padding: 12px 16px;
            }
            .version-compare-row .compare-content {
                grid-template-columns: 1fr;
                gap: 12px;
                padding: 14px 16px;
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
            .cta-section h2 {
                font-size: 24px;
            }
        }
@media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .site-header .container {
                height: 60px;
            }
            .site-logo {
                font-size: 15px;
                gap: 8px;
            }
            .site-logo .logo-mark {
                width: 30px;
                height: 30px;
            }
            .site-logo .logo-mark svg {
                width: 16px;
                height: 16px;
            }
            .filter-tabs {
                gap: 6px;
            }
            .filter-tab {
                padding: 6px 14px;
                font-size: 13px;
            }
            .download-item-icon {
                width: 40px;
                height: 40px;
            }
            .download-item-info h3 {
                font-size: 14px;
            }
            .download-item-meta {
                font-size: 12px;
            }
            .btn-download {
                padding: 8px 16px;
                font-size: 13px;
            }
            .security-item {
                padding: 14px 16px;
                gap: 10px;
            }
            .faq-question {
                padding: 14px 16px;
                font-size: 14px;
            }
            .faq-answer p {
                font-size: 13px;
            }
            .cta-section {
                padding: 40px 0;
            }
            .cta-section h2 {
                font-size: 22px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
        }

/* roulang page: category3 */
:root {
            --primary: #123033;
            --primary-dark: #0d2426;
            --primary-light: #1a4246;
            --accent: #C6A15B;
            --accent-hover: #d4b06a;
            --bg: #F6F4EF;
            --bg-alt: #EEEAE1;
            --bg-white: #ffffff;
            --highlight: #D95D39;
            --text: #1E2B2C;
            --text-secondary: #5B6663;
            --text-muted: #8A938F;
            --success: #2E7D5B;
            --error: #B5483D;
            --border: #E2DED6;
            --border-dark: rgba(255, 255, 255, 0.08);
            --radius-card: 14px;
            --radius-btn: 10px;
            --radius-input: 8px;
            --radius-badge: 999px;
            --shadow-sm: 0 8px 24px rgba(18, 48, 51, 0.08);
            --shadow-md: 0 12px 32px rgba(18, 48, 51, 0.14);
            --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            --container-max: 1200px;
            --container-padding: 24px;
            --section-padding: 64px 0;
            --transition: 0.3s ease;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--font-family);
            font-size: 15px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            letter-spacing: 0;
            overflow-x: hidden;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition), background var(--transition), transform var(--transition), box-shadow var(--transition), border-color var(--transition);
        }
        a:hover {
            text-decoration: none;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
        }
        ul, ol {
            list-style: none;
        }
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 var(--container-padding);
            width: 100%;
        }
        /* Header & Navigation */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: var(--primary);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
        }
        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            letter-spacing: -0.01em;
            white-space: nowrap;
        }
        .site-logo:hover {
            color: #fff;
        }
        .site-logo .logo-mark {
            width: 36px;
            height: 36px;
            border-radius: 8px;
            background: var(--accent);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }
        .site-logo .logo-mark svg {
            width: 20px;
            height: 20px;
            fill: var(--primary);
        }
        .site-nav {
            display: flex;
            align-items: center;
            gap: 26px;
        }
        .site-nav a {
            color: rgba(255, 255, 255, 0.82);
            font-size: 14px;
            font-weight: 500;
            padding: 4px 0;
            position: relative;
            letter-spacing: 0;
            white-space: nowrap;
        }
        .site-nav a:hover,
        .site-nav a.active {
            color: #fff;
        }
        .site-nav a.active::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 0;
            right: 0;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
        }
        .site-nav a:not(.active)::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 50%;
            right: 50%;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
            transition: left var(--transition), right var(--transition);
        }
        .site-nav a:not(.active):hover::after {
            left: 0;
            right: 0;
        }
        .nav-cta {
            background: var(--accent);
            color: var(--primary) !important;
            padding: 8px 18px !important;
            border-radius: var(--radius-btn);
            font-weight: 600;
            transition: background var(--transition), transform var(--transition);
        }
        .nav-cta:hover {
            background: var(--accent-hover);
            transform: translateY(-1px);
        }
        .nav-cta.active::after {
            display: none;
        }
        /* Mobile Nav Toggle */
        .nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            align-items: center;
            justify-content: center;
            background: transparent;
            border-radius: 8px;
            flex-shrink: 0;
        }
        .nav-toggle span,
        .nav-toggle span::before,
        .nav-toggle span::after {
            display: block;
            width: 22px;
            height: 2px;
            background: #fff;
            border-radius: 2px;
            position: relative;
            transition: transform var(--transition), opacity var(--transition);
        }
        .nav-toggle span::before,
        .nav-toggle span::after {
            content: '';
            position: absolute;
        }
        .nav-toggle span::before {
            top: -6px;
        }
        .nav-toggle span::after {
            bottom: -6px;
        }
        .nav-toggle.open span {
            background: transparent;
        }
        .nav-toggle.open span::before {
            top: 0;
            transform: rotate(45deg);
        }
        .nav-toggle.open span::after {
            bottom: 0;
            transform: rotate(-45deg);
        }
        .mobile-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.55);
            z-index: 98;
        }
        .mobile-overlay.active {
            display: block;
        }
        /* Breadcrumb */
        .breadcrumb-bar {
            padding: 16px 0 0;
            background: var(--bg);
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-muted);
            flex-wrap: wrap;
            margin: 0;
            padding: 0;
        }
        .breadcrumb a {
            color: var(--text-secondary);
            transition: color var(--transition);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb .sep {
            color: #B8B2A6;
        }
        .breadcrumb .current {
            color: var(--primary);
            font-weight: 500;
        }
        /* Category Hero */
        .category-hero {
            background: linear-gradient(135deg, var(--primary) 0%, #1a4246 100%);
            padding: 52px 0 48px;
            position: relative;
            overflow: hidden;
        }
        .category-hero::after {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 260px;
            height: 260px;
            border-radius: 50%;
            background: rgba(198, 161, 91, 0.08);
            pointer-events: none;
        }
        .category-hero .container {
            position: relative;
            z-index: 1;
        }
        .category-hero h1 {
            font-size: 32px;
            font-weight: 700;
            line-height: 1.25;
            color: #fff;
            margin: 0 0 12px;
            letter-spacing: -0.01em;
        }
        .category-hero .hero-sub {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.78);
            max-width: 620px;
            line-height: 1.7;
            margin: 0;
        }
        /* Section General */
        .section {
            padding: var(--section-padding);
        }
        .section-alt {
            background: var(--bg-alt);
        }
        .section-white {
            background: var(--bg-white);
        }
        .section-title {
            font-size: 26px;
            font-weight: 700;
            color: var(--text);
            margin: 0 0 10px;
            letter-spacing: -0.01em;
            line-height: 1.3;
        }
        .section-subtitle {
            font-size: 15px;
            color: var(--text-secondary);
            margin: 0 0 28px;
            line-height: 1.7;
        }
        .section-head {
            margin-bottom: 28px;
        }
        .section-head .tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            color: var(--accent);
            background: rgba(198, 161, 91, 0.12);
            padding: 4px 12px;
            border-radius: 999px;
            margin-bottom: 10px;
            letter-spacing: 0.02em;
        }
        /* Term Cards */
        .term-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .term-card {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 22px 20px;
            box-shadow: var(--shadow-sm);
            transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .term-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
            border-color: var(--accent);
        }
        .term-card .term-icon {
            width: 40px;
            height: 40px;
            border-radius: 8px;
            background: var(--bg-alt);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }
        .term-card .term-icon svg {
            width: 22px;
            height: 22px;
            fill: var(--primary);
        }
        .term-card h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            margin: 0;
        }
        .term-card p {
            font-size: 13px;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.6;
        }
        /* Market Overview */
        .market-panel {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
        }
        .market-panel .market-head {
            padding: 18px 22px;
            background: var(--primary);
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 10px;
        }
        .market-panel .market-head h2 {
            font-size: 17px;
            font-weight: 600;
            color: #fff;
            margin: 0;
        }
        .market-panel .market-badge {
            font-size: 12px;
            color: var(--accent);
            background: rgba(198, 161, 91, 0.15);
            padding: 4px 10px;
            border-radius: 999px;
        }
        .market-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1px;
            background: var(--border);
        }
        .market-item {
            background: var(--bg-white);
            padding: 18px 16px;
            text-align: center;
        }
        .market-item .market-label {
            font-size: 12px;
            color: var(--text-muted);
            margin-bottom: 6px;
        }
        .market-item .market-value {
            font-size: 22px;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: -0.01em;
        }
        .market-item .market-change {
            font-size: 12px;
            font-weight: 500;
            margin-top: 4px;
        }
        .market-change.up {
            color: var(--success);
        }
        .market-change.down {
            color: var(--error);
        }
        /* News List */
        .news-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 18px;
        }
        .news-card {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-sm);
            padding: 16px;
            display: flex;
            gap: 16px;
            transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
        }
        .news-card:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
            border-color: var(--accent);
        }
        .news-thumb {
            width: 150px;
            min-height: 100px;
            border-radius: 8px;
            overflow: hidden;
            flex-shrink: 0;
            background: #E8E4DC;
        }
        .news-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            display: block;
        }
        .news-body {
            flex: 1;
            min-width: 0;
            display: flex;
            flex-direction: column;
        }
        .news-meta {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 12px;
            color: var(--text-muted);
            margin-bottom: 6px;
            flex-wrap: wrap;
        }
        .news-meta .news-cat {
            color: var(--accent);
            font-weight: 500;
            background: rgba(198, 161, 91, 0.12);
            padding: 2px 8px;
            border-radius: 999px;
        }
        .news-meta .news-date {
            color: var(--text-muted);
        }
        .news-title {
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            margin: 0 0 6px;
            line-height: 1.45;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-title a {
            color: inherit;
        }
        .news-title a:hover {
            color: var(--primary);
        }
        .news-excerpt {
            font-size: 13px;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            flex: 1;
        }
        /* Beginner Banner */
        .beginner-banner {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-sm);
            padding: 28px 26px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            flex-wrap: wrap;
            position: relative;
            overflow: hidden;
        }
        .beginner-banner::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0;
            bottom: 0;
            width: 5px;
            background: var(--accent);
        }
        .beginner-banner .bb-content h3 {
            font-size: 19px;
            font-weight: 700;
            color: var(--text);
            margin: 0 0 6px;
        }
        .beginner-banner .bb-content p {
            font-size: 14px;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.6;
            max-width: 520px;
        }
        .bb-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--accent);
            white-space: nowrap;
            padding: 8px 0;
            position: relative;
            transition: color var(--transition);
        }
        .bb-link:hover {
            color: var(--highlight);
        }
        .bb-link::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 0;
            right: 0;
            height: 1px;
            background: var(--accent);
            transition: background var(--transition);
        }
        .bb-link:hover::after {
            background: var(--highlight);
        }
        /* Download CTA Banner */
        .cta-banner {
            background: var(--primary);
            border-radius: var(--radius-card);
            padding: 40px 36px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-banner::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -80px;
            width: 240px;
            height: 240px;
            border-radius: 50%;
            background: rgba(198, 161, 91, 0.08);
        }
        .cta-banner::after {
            content: '';
            position: absolute;
            bottom: -60px;
            left: -60px;
            width: 180px;
            height: 180px;
            border-radius: 50%;
            background: rgba(198, 161, 91, 0.06);
        }
        .cta-banner .container {
            position: relative;
            z-index: 1;
        }
        .cta-banner h2 {
            font-size: 28px;
            font-weight: 700;
            color: #fff;
            margin: 0 0 10px;
            letter-spacing: -0.01em;
        }
        .cta-banner p {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.75);
            margin: 0 0 22px;
        }
        .btn-primary {
            display: inline-block;
            background: var(--accent);
            color: var(--primary);
            font-weight: 600;
            font-size: 15px;
            padding: 12px 30px;
            border-radius: var(--radius-btn);
            border: none;
            cursor: pointer;
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
            letter-spacing: 0;
        }
        .btn-primary:hover {
            background: var(--accent-hover);
            transform: translateY(-1px);
            box-shadow: 0 8px 20px rgba(198, 161, 91, 0.3);
            color: var(--primary);
        }
        .btn-primary:focus-visible {
            outline: 2px solid var(--highlight);
            outline-offset: 2px;
        }
        /* Back link */
        .back-row {
            text-align: center;
            padding: 12px 0 40px;
        }
        .back-link {
            font-size: 14px;
            color: var(--text-secondary);
            transition: color var(--transition);
        }
        .back-link:hover {
            color: var(--primary);
        }
        /* Footer */
        .site-footer {
            background: var(--primary-dark);
            padding: 48px 0 24px;
            color: rgba(255, 255, 255, 0.72);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            padding-bottom: 32px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin: 0 0 14px;
            letter-spacing: 0;
        }
        .footer-col a {
            display: block;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.62);
            padding: 4px 0;
            transition: color var(--transition), padding-left var(--transition);
        }
        .footer-col a:hover {
            color: var(--accent);
            padding-left: 4px;
        }
        .footer-bottom {
            padding-top: 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 10px;
            font-size: 12px;
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
            transition: color var(--transition);
        }
        .footer-bottom a:hover {
            color: var(--accent);
        }
        .footer-site-name {
            color: var(--accent);
            font-weight: 600;
        }
        /* Responsive */
        @media (max-width: 1024px) {
            .term-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .market-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .news-list {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
            .section {
                padding: 40px 0;
            }
            .site-header .container {
                height: 60px;
            }
            .site-nav {
                position: fixed;
                top: 0;
                right: -285px;
                width: 280px;
                height: 100vh;
                background: var(--primary);
                flex-direction: column;
                align-items: flex-start;
                gap: 6px;
                padding: 70px 20px 20px;
                transition: right var(--transition);
                z-index: 99;
                box-shadow: -8px 0 24px rgba(0,0,0,0.3);
                overflow-y: auto;
            }
            .site-nav.open {
                right: 0;
            }
            .site-nav a {
                color: rgba(255, 255, 255, 0.85);
                font-size: 15px;
                padding: 10px 0;
                width: 100%;
                border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            }
            .site-nav a.active {
                color: var(--accent);
                background: rgba(255, 255, 255, 0.08);
                padding-left: 10px;
                border-radius: 6px;
            }
            .site-nav a.active::after {
                display: none;
            }
            .site-nav a:not(.active)::after {
                display: none;
            }
            .nav-cta {
                margin-top: 12px;
                text-align: center;
                padding: 10px 18px !important;
                border-bottom: none !important;
            }
            .nav-toggle {
                display: flex;
            }
            .category-hero {
                padding: 36px 0 32px;
            }
            .category-hero h1 {
                font-size: 24px;
            }
            .category-hero .hero-sub {
                font-size: 14px;
            }
            .section-title {
                font-size: 21px;
            }
            .term-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .news-card {
                flex-direction: column;
            }
            .news-thumb {
                width: 100%;
                min-height: 140px;
            }
            .beginner-banner {
                flex-direction: column;
                text-align: center;
                padding: 22px 18px;
            }
            .beginner-banner::before {
                display: none;
            }
            .cta-banner {
                padding: 30px 20px;
            }
            .cta-banner h2 {
                font-size: 22px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }
        @media (max-width: 520px) {
            .market-grid {
                grid-template-columns: 1fr;
            }
            .site-logo {
                font-size: 15px;
            }
            .site-logo .logo-mark {
                width: 30px;
                height: 30px;
            }
            .site-logo .logo-mark svg {
                width: 17px;
                height: 17px;
            }
            .category-hero h1 {
                font-size: 20px;
            }
            .section-title {
                font-size: 19px;
            }
            .cta-banner h2 {
                font-size: 19px;
            }
            .btn-primary {
                padding: 10px 22px;
                font-size: 14px;
            }
        }