/* roulang page: index */
:root {
        --primary: #F26419;
        --primary-dark: #D9531E;
        --primary-light: #FF8C50;
        --secondary: #0E7C66;
        --secondary-light: #00A896;
        --secondary-bg: #E6F3F0;
        --bg-page: #F7F5F0;
        --bg-dark: #181818;
        --bg-card: #FFFFFF;
        --bg-input: #F2EFEA;
        --border-color: #E5E0D8;
        --text-primary: #1A1A1A;
        --text-secondary: #5C5C5C;
        --text-muted: #8A8580;
        --text-on-dark: #FFFFFF;
        --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
        --font-mono: "SF Mono", "Roboto Mono", Consolas, monospace;
        --radius-card: 12px;
        --radius-btn: 8px;
        --radius-input: 6px;
        --radius-badge: 20px;
        --radius-modal: 16px;
        --shadow-card: 0 2px 10px rgba(26,26,26,0.05);
        --shadow-card-hover: 0 10px 28px rgba(26,26,26,0.10);
        --shadow-btn: 0 4px 10px rgba(242,100,25,0.25);
        --transition: 0.22s ease;
        --max-width: 1200px;
    }
    *,
    *::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-sans);
        font-size: 15px;
        font-weight: 400;
        line-height: 1.7;
        color: var(--text-primary);
        background-color: var(--bg-page);
        overflow-x: hidden;
    }
    a {
        color: inherit;
        text-decoration: none;
        transition: color var(--transition);
    }
    a:hover {
        color: var(--secondary);
    }
    img {
        max-width: 100%;
        height: auto;
        display: block;
        border-radius: var(--radius-card);
    }
    button,
    input {
        font-family: inherit;
        font-size: inherit;
    }
    button {
        cursor: pointer;
        border: none;
        background: none;
    }
    input {
        outline: none;
    }
    .container {
        max-width: var(--max-width);
        margin: 0 auto;
        padding: 0 24px;
    }
    .section {
        padding: 64px 0;
    }
    .section-alt {
        background-color: #F0EDE6;
    }
    .section-dark {
        background-color: var(--bg-dark);
        color: var(--text-on-dark);
    }
    .section-head {
        margin-bottom: 36px;
    }
    .section-head h2 {
        font-size: 26px;
        font-weight: 700;
        line-height: 1.3;
        color: var(--text-primary);
        margin-bottom: 8px;
    }
    .section-head p {
        font-size: 15px;
        color: var(--text-secondary);
        line-height: 1.6;
        max-width: 680px;
    }
    .section-dark .section-head h2 {
        color: #fff;
    }
    .section-dark .section-head p {
        color: #C9C4BE;
    }

    /* Buttons */
    .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        padding: 12px 26px;
        font-size: 15px;
        font-weight: 600;
        border-radius: var(--radius-btn);
        transition: all var(--transition);
        text-align: center;
        min-height: 44px;
        white-space: nowrap;
    }
    .btn:focus-visible,
    button:focus-visible,
    a:focus-visible,
    input:focus-visible {
        outline: 2px solid var(--primary);
        outline-offset: 2px;
    }
    .btn-primary {
        background-color: var(--primary);
        color: #fff;
        box-shadow: var(--shadow-btn);
    }
    .btn-primary:hover {
        background-color: var(--primary-dark);
        transform: translateY(-1px);
        color: #fff;
    }
    .btn-primary:active {
        transform: translateY(0);
    }
    .btn-outline {
        background: transparent;
        color: var(--secondary);
        border: 1px solid var(--secondary);
    }
    .btn-outline:hover {
        background-color: var(--secondary-bg);
        color: var(--secondary);
        transform: translateY(-1px);
    }
    .btn-outline:active {
        transform: translateY(0);
    }
    .btn-outline-light {
        background: transparent;
        color: #fff;
        border: 1px solid rgba(255,255,255,0.5);
    }
    .btn-outline-light:hover {
        background-color: rgba(255,255,255,0.12);
        color: #fff;
        transform: translateY(-1px);
    }
    .btn-sm {
        padding: 8px 18px;
        font-size: 14px;
        min-height: 36px;
    }
    .btn-block {
        width: 100%;
    }
    .btn:disabled {
        opacity: 0.4;
        pointer-events: none;
    }

    /* Header */
    .site-header {
        position: sticky;
        top: 0;
        z-index: 100;
        height: 64px;
        background: rgba(247,245,240,0.92);
        backdrop-filter: blur(10px);
        -webkit-backdrop-filter: blur(10px);
        border-bottom: 1px solid var(--border-color);
    }
    .header-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: 100%;
        max-width: var(--max-width);
        margin: 0 auto;
        padding: 0 24px;
        gap: 20px;
    }
    .logo {
        font-size: 19px;
        font-weight: 700;
        color: var(--text-primary);
        white-space: nowrap;
        letter-spacing: 0.02em;
    }
    .logo .logo-accent {
        color: var(--primary);
    }
    .main-nav {
        display: flex;
        align-items: center;
        gap: 8px;
        flex: 1;
        justify-content: center;
    }
    .main-nav a {
        display: inline-block;
        padding: 8px 14px;
        font-size: 15px;
        font-weight: 500;
        color: var(--text-secondary);
        position: relative;
        white-space: nowrap;
        transition: color var(--transition);
    }
    .main-nav a:hover {
        color: var(--secondary);
    }
    .main-nav a.active {
        color: var(--primary);
        font-weight: 600;
    }
    .main-nav a.active::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 14px;
        right: 14px;
        height: 2px;
        background-color: var(--primary);
        border-radius: 1px;
    }
    .header-cta {
        display: flex;
        align-items: center;
        gap: 10px;
        flex-shrink: 0;
    }
    .hamburger {
        display: none;
        flex-direction: column;
        gap: 5px;
        padding: 8px;
        min-width: 44px;
        min-height: 44px;
        align-items: center;
        justify-content: center;
        background: transparent;
    }
    .hamburger span {
        display: block;
        width: 24px;
        height: 2px;
        background-color: var(--text-primary);
        border-radius: 1px;
        transition: all 0.3s ease;
    }
    .drawer-overlay {
        display: none;
        position: fixed;
        inset: 0;
        background: rgba(0,0,0,0.5);
        z-index: 150;
        opacity: 0;
        transition: opacity 0.3s ease;
    }
    .drawer-overlay.open {
        opacity: 1;
    }
    .drawer {
        position: fixed;
        top: 0;
        right: -320px;
        width: 300px;
        height: 100vh;
        background: #fff;
        z-index: 200;
        transition: right 0.32s ease;
        display: flex;
        flex-direction: column;
        padding: 24px 20px;
        box-shadow: -6px 0 20px rgba(0,0,0,0.12);
        overflow-y: auto;
    }
    .drawer.open {
        right: 0;
    }
    .drawer-close {
        position: absolute;
        top: 16px;
        right: 16px;
        min-width: 44px;
        min-height: 44px;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 28px;
        color: var(--text-secondary);
    }
    .drawer-nav {
        display: flex;
        flex-direction: column;
        gap: 6px;
        margin-top: 56px;
    }
    .drawer-nav a {
        display: block;
        padding: 14px 16px;
        font-size: 16px;
        font-weight: 500;
        color: var(--text-primary);
        border-radius: var(--radius-btn);
        min-height: 44px;
        transition: background var(--transition);
    }
    .drawer-nav a:hover {
        background-color: var(--bg-input);
    }
    .drawer-nav a.active {
        background-color: #FFF3E8;
        color: var(--primary);
        font-weight: 600;
    }
    .drawer .btn {
        margin-top: 24px;
        width: 100%;
    }

    /* Hero */
    .hero {
        background-color: var(--bg-dark);
        background-image: url('/assets/images/786577ba88aab3bc.webp');
        background-size: cover;
        background-position: center;
        position: relative;
        color: #fff;
        padding: 80px 0 96px;
        overflow: hidden;
    }
    .hero::before {
        content: '';
        position: absolute;
        inset: 0;
        background: rgba(24,24,24,0.72);
        z-index: 0;
    }
    .hero::after {
        content: '';
        position: absolute;
        top: -120px;
        right: -80px;
        width: 420px;
        height: 420px;
        background: radial-gradient(circle, rgba(242,100,25,0.38) 0%, transparent 70%);
        z-index: 0;
    }
    .hero-inner {
        position: relative;
        z-index: 1;
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 48px;
        align-items: center;
        max-width: var(--max-width);
        margin: 0 auto;
        padding: 0 24px;
    }
    .hero-content h1 {
        font-size: 36px;
        font-weight: 700;
        line-height: 1.25;
        margin-bottom: 16px;
        letter-spacing: 0.01em;
    }
    .hero-content .hero-sub {
        font-size: 16px;
        line-height: 1.7;
        color: #D5D0C9;
        margin-bottom: 28px;
        max-width: 480px;
    }
    .hero-actions {
        display: flex;
        gap: 14px;
        flex-wrap: wrap;
        margin-bottom: 24px;
    }
    .hero-meta {
        display: flex;
        flex-wrap: wrap;
        gap: 12px 20px;
        align-items: center;
    }
    .hero-meta-item {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        font-size: 13px;
        color: #BBB5AD;
    }
    .hero-meta-item .mono {
        font-family: var(--font-mono);
        color: #fff;
    }
    .badge-safe {
        display: inline-flex;
        align-items: center;
        gap: 5px;
        background-color: rgba(14,124,102,0.35);
        color: #A8E6D5;
        border: 1px solid rgba(168,230,213,0.4);
        padding: 4px 12px;
        font-size: 12px;
        font-weight: 600;
        border-radius: var(--radius-badge);
    }
    .hero-visual {
        display: flex;
        align-items: center;
        justify-content: center;
    }
    .hero-visual-card {
        width: 100%;
        max-width: 440px;
        background: #fff;
        border-radius: var(--radius-card);
        overflow: hidden;
        box-shadow: 0 24px 48px rgba(0,0,0,0.35);
    }
    .hero-visual-card img {
        border-radius: 0;
        width: 100%;
        height: auto;
        aspect-ratio: 16/10;
        object-fit: cover;
    }
    .hero-visual-bar {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 12px 16px;
        background: #fff;
        border-top: 1px solid var(--border-color);
    }
    .hero-visual-bar span {
        font-size: 12px;
        color: var(--text-secondary);
    }
    .hero-visual-bar .dot-group {
        display: flex;
        gap: 6px;
    }
    .hero-visual-bar .dot {
        width: 8px;
        height: 8px;
        border-radius: 50%;
        background-color: #D0C9C0;
    }
    .hero-visual-bar .dot.active {
        background-color: var(--primary);
    }

    /* Quick Download Bar */
    .quick-download {
        background: #fff;
        border-bottom: 1px solid var(--border-color);
        padding: 0;
    }
    .quick-download-inner {
        max-width: var(--max-width);
        margin: 0 auto;
        padding: 0 24px;
    }
    .platform-tabs {
        display: flex;
        gap: 4px;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
        padding: 16px 0;
    }
    .platform-tabs::-webkit-scrollbar {
        display: none;
    }
    .platform-tab {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        padding: 10px 20px;
        font-size: 14px;
        font-weight: 600;
        color: var(--text-secondary);
        background: var(--bg-page);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-badge);
        white-space: nowrap;
        transition: all var(--transition);
        min-height: 44px;
        flex-shrink: 0;
    }
    .platform-tab:hover {
        border-color: var(--secondary-light);
        color: var(--secondary);
    }
    .platform-tab.active {
        background-color: var(--primary);
        color: #fff;
        border-color: var(--primary);
    }
    .platform-panel {
        display: none;
        padding: 20px 0 28px;
    }
    .platform-panel.active {
        display: flex;
        align-items: center;
        justify-content: space-between;
        flex-wrap: wrap;
        gap: 16px;
    }
    .platform-panel .panel-info h3 {
        font-size: 18px;
        font-weight: 600;
        margin-bottom: 4px;
    }
    .platform-panel .panel-info p {
        font-size: 14px;
        color: var(--text-secondary);
    }

    /* Stats */
    .stats-bar {
        background: #fff;
        border-bottom: 1px solid var(--border-color);
    }
    .stats-inner {
        max-width: var(--max-width);
        margin: 0 auto;
        padding: 28px 24px;
        display: grid;
        grid-template-columns: repeat(5, 1fr);
        gap: 20px;
        align-items: center;
    }
    .stat-item {
        text-align: center;
        padding: 10px;
        border-right: 1px solid var(--border-color);
    }
    .stat-item:last-child {
        border-right: none;
    }
    .stat-item .stat-num {
        font-family: var(--font-mono);
        font-size: 22px;
        font-weight: 700;
        color: var(--primary);
        display: block;
        margin-bottom: 4px;
    }
    .stat-item .stat-label {
        font-size: 13px;
        color: var(--text-secondary);
    }

    /* News / CMS */
    .news-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 20px;
    }
    .news-card {
        background: var(--bg-card);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-card);
        padding: 20px;
        transition: all var(--transition);
        box-shadow: var(--shadow-card);
    }
    .news-card:hover {
        transform: translateY(-3px);
        border-color: var(--secondary-light);
        box-shadow: var(--shadow-card-hover);
    }
    .news-card .card-tag {
        display: inline-block;
        background-color: #FFF3E8;
        color: var(--primary);
        padding: 3px 12px;
        font-size: 12px;
        font-weight: 600;
        border-radius: var(--radius-badge);
        margin-bottom: 10px;
    }
    .news-card h3 {
        font-size: 16px;
        font-weight: 600;
        line-height: 1.4;
        margin-bottom: 8px;
        color: var(--text-primary);
        transition: color var(--transition);
    }
    .news-card:hover h3 {
        color: var(--primary);
    }
    .news-card p {
        font-size: 14px;
        color: var(--text-secondary);
        line-height: 1.6;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
        margin-bottom: 14px;
    }
    .news-card .card-meta {
        display: flex;
        align-items: center;
        justify-content: space-between;
        font-size: 13px;
        color: var(--text-muted);
        border-top: 1px solid var(--border-color);
        padding-top: 12px;
    }
    .empty-state {
        text-align: center;
        padding: 48px 20px;
        background: #fff;
        border: 1px dashed var(--border-color);
        border-radius: var(--radius-card);
        color: var(--text-muted);
        font-size: 15px;
    }

    /* Features */
    .features-grid {
        display: flex;
        flex-direction: column;
        gap: 44px;
    }
    .feature-row {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 36px;
        align-items: center;
    }
    .feature-row.reverse .feature-img {
        order: 2;
    }
    .feature-row.reverse .feature-text {
        order: 1;
    }
    .feature-img {
        background: #fff;
        border-radius: var(--radius-card);
        overflow: hidden;
        box-shadow: var(--shadow-card);
    }
    .feature-img img {
        width: 100%;
        height: auto;
        aspect-ratio: 16/10;
        object-fit: cover;
        border-radius: 0;
    }
    .feature-text h3 {
        font-size: 22px;
        font-weight: 700;
        line-height: 1.3;
        margin-bottom: 12px;
    }
    .feature-text p {
        font-size: 15px;
        color: var(--text-secondary);
        line-height: 1.7;
        margin-bottom: 16px;
    }
    .feature-text .feature-tag {
        display: inline-block;
        background-color: var(--secondary-bg);
        color: var(--secondary);
        padding: 4px 14px;
        font-size: 13px;
        font-weight: 600;
        border-radius: var(--radius-badge);
    }

    /* Tutorial cards - horizontal scroll */
    .hscroll {
        display: flex;
        gap: 20px;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: thin;
        scrollbar-color: var(--border-color) transparent;
        padding-bottom: 12px;
    }
    .hscroll::-webkit-scrollbar {
        height: 6px;
    }
    .hscroll::-webkit-scrollbar-track {
        background: transparent;
    }
    .hscroll::-webkit-scrollbar-thumb {
        background-color: var(--border-color);
        border-radius: 3px;
    }
    .hcard {
        flex-shrink: 0;
        width: 300px;
        background: #fff;
        border: 1px solid var(--border-color);
        border-radius: var(--radius-card);
        overflow: hidden;
        transition: all var(--transition);
        box-shadow: var(--shadow-card);
    }
    .hcard:hover {
        transform: translateY(-3px);
        border-color: var(--primary-light);
        box-shadow: var(--shadow-card-hover);
    }
    .hcard-img {
        aspect-ratio: 16/9;
        overflow: hidden;
        background: #F0EDE6;
    }
    .hcard-img img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        border-radius: 0;
    }
    .hcard-body {
        padding: 16px 18px;
    }
    .hcard-body h3 {
        font-size: 16px;
        font-weight: 600;
        line-height: 1.4;
        margin-bottom: 6px;
        transition: color var(--transition);
    }
    .hcard:hover .hcard-body h3 {
        color: var(--primary);
    }
    .hcard-body p {
        font-size: 13px;
        color: var(--text-secondary);
        line-height: 1.5;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
        margin-bottom: 10px;
    }
    .hcard-body .hcard-meta {
        font-size: 12px;
        color: var(--text-muted);
    }

    /* Resource cards */
    .resource-card {
        flex-shrink: 0;
        width: 280px;
        background: #fff;
        border: 1px solid var(--border-color);
        border-radius: var(--radius-card);
        overflow: hidden;
        transition: all var(--transition);
        box-shadow: var(--shadow-card);
    }
    .resource-card:hover {
        transform: translateY(-3px);
        border-color: var(--secondary-light);
        box-shadow: var(--shadow-card-hover);
    }
    .resource-card-img {
        aspect-ratio: 4/3;
        overflow: hidden;
        background: #F0EDE6;
    }
    .resource-card-img img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        border-radius: 0;
    }
    .resource-card-body {
        padding: 14px 16px;
    }
    .resource-card-body h3 {
        font-size: 15px;
        font-weight: 600;
        line-height: 1.4;
        margin-bottom: 4px;
    }
    .resource-card-body .res-tag {
        display: inline-block;
        background-color: #FFF3E8;
        color: var(--primary);
        padding: 2px 10px;
        font-size: 12px;
        font-weight: 600;
        border-radius: var(--radius-badge);
        margin-bottom: 8px;
    }
    .resource-card-body p {
        font-size: 13px;
        color: var(--text-secondary);
        line-height: 1.5;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
        margin-bottom: 10px;
    }
    .resource-card-body .res-action {
        display: flex;
        align-items: center;
        justify-content: space-between;
    }
    .resource-card-body .res-action .btn-link {
        font-size: 13px;
        font-weight: 600;
        color: var(--secondary);
        padding: 4px 0;
    }

    /* Security */
    .security-section {
        background-color: #0D6B58;
        color: #fff;
        padding: 64px 0;
    }
    .security-section .section-head h2 {
        color: #fff;
    }
    .security-section .section-head p {
        color: #B8D8CE;
    }
    .security-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 16px;
    }
    .security-item {
        background: rgba(255,255,255,0.08);
        border: 1px solid rgba(255,255,255,0.16);
        border-radius: var(--radius-card);
        padding: 20px;
        text-align: center;
        transition: all var(--transition);
    }
    .security-item:hover {
        background: rgba(255,255,255,0.14);
        transform: translateY(-2px);
    }
    .security-item .sec-icon {
        font-size: 26px;
        margin-bottom: 8px;
        display: block;
    }
    .security-item .sec-value {
        font-family: var(--font-mono);
        font-size: 18px;
        font-weight: 700;
        display: block;
        margin-bottom: 4px;
        color: #A8E6D5;
    }
    .security-item .sec-label {
        font-size: 13px;
        color: #B8D8CE;
    }
    .security-check {
        display: flex;
        align-items: center;
        gap: 8px;
        margin-top: 24px;
        padding: 12px 18px;
        background: rgba(255,255,255,0.06);
        border-radius: var(--radius-btn);
        font-size: 14px;
    }
    .security-check .check-icon {
        color: #4CD9A8;
        font-weight: 700;
        font-size: 18px;
    }

    /* Version list */
    .version-list {
        background: #fff;
        border: 1px solid var(--border-color);
        border-radius: var(--radius-card);
        overflow: hidden;
    }
    .version-row {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 16px 22px;
        border-bottom: 1px solid var(--border-color);
        transition: background var(--transition);
        flex-wrap: wrap;
        gap: 12px;
    }
    .version-row:last-child {
        border-bottom: none;
    }
    .version-row:hover {
        background: #FFF9F5;
    }
    .version-info {
        display: flex;
        align-items: center;
        gap: 16px;
        flex-wrap: wrap;
    }
    .version-num {
        font-family: var(--font-mono);
        font-size: 16px;
        font-weight: 700;
        color: var(--primary);
    }
    .version-date {
        font-size: 13px;
        color: var(--text-muted);
    }
    .version-tag {
        font-size: 12px;
        font-weight: 600;
        padding: 2px 10px;
        border-radius: var(--radius-badge);
        background: var(--secondary-bg);
        color: var(--secondary);
    }
    .version-actions {
        display: flex;
        gap: 10px;
    }

    /* FAQ */
    .faq-list {
        max-width: 780px;
        margin: 0 auto;
    }
    .faq-item {
        background: #fff;
        border: 1px solid var(--border-color);
        border-radius: var(--radius-card);
        margin-bottom: 10px;
        overflow: hidden;
        transition: border-color var(--transition);
    }
    .faq-item:focus-within {
        border-color: var(--secondary-light);
    }
    .faq-question {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 14px;
        padding: 16px 20px;
        font-size: 15px;
        font-weight: 600;
        color: var(--text-primary);
        text-align: left;
        width: 100%;
        min-height: 44px;
        cursor: pointer;
        background: #fff;
        transition: color var(--transition);
    }
    .faq-question:hover {
        color: var(--secondary);
    }
    .faq-icon {
        font-size: 20px;
        color: var(--primary);
        transition: transform 0.3s ease;
        flex-shrink: 0;
        line-height: 1;
    }
    .faq-item.open .faq-icon {
        transform: rotate(45deg);
    }
    .faq-answer {
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.35s ease, padding 0.35s ease;
        padding: 0 20px;
    }
    .faq-item.open .faq-answer {
        max-height: 400px;
        padding: 0 20px 18px;
    }
    .faq-answer p {
        font-size: 14px;
        color: var(--text-secondary);
        line-height: 1.7;
    }

    /* Usage scenarios */
    .scenario-tags {
        display: flex;
        flex-wrap: wrap;
        gap: 10px;
        justify-content: center;
    }
    .scenario-tag {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        padding: 10px 18px;
        background: #fff;
        border: 1px solid var(--border-color);
        border-radius: var(--radius-badge);
        font-size: 14px;
        font-weight: 500;
        color: var(--text-secondary);
        transition: all var(--transition);
        min-height: 44px;
    }
    .scenario-tag:hover {
        border-color: var(--primary-light);
        color: var(--primary);
        transform: translateY(-2px);
    }
    .scenario-tag .scenario-icon {
        font-size: 16px;
    }

    /* CTA */
    .cta-section {
        background-color: var(--bg-dark);
        background-image: url('/assets/images/e5dd3a8fed52a202.webp');
        background-size: cover;
        background-position: center;
        position: relative;
        color: #fff;
        padding: 72px 0;
        overflow: hidden;
    }
    .cta-section::before {
        content: '';
        position: absolute;
        inset: 0;
        background: rgba(24,24,24,0.78);
    }
    .cta-inner {
        position: relative;
        z-index: 1;
        text-align: center;
        max-width: 640px;
        margin: 0 auto;
        padding: 0 24px;
    }
    .cta-inner h2 {
        font-size: 28px;
        font-weight: 700;
        line-height: 1.3;
        margin-bottom: 12px;
    }
    .cta-inner p {
        font-size: 15px;
        color: #C9C4BE;
        margin-bottom: 24px;
        line-height: 1.6;
    }
    .cta-meta {
        display: flex;
        justify-content: center;
        gap: 18px;
        flex-wrap: wrap;
        margin-top: 16px;
        font-size: 13px;
        color: #BBB5AD;
    }
    .cta-meta .mono {
        font-family: var(--font-mono);
        color: #fff;
    }

    /* Form */
    .form-section {
        background: #fff;
        border-top: 1px solid var(--border-color);
    }
    .form-wrap {
        max-width: 560px;
        margin: 0 auto;
    }
    .form-row {
        display: flex;
        gap: 10px;
        flex-wrap: wrap;
    }
    .form-row input[type="email"],
    .form-row input[type="text"] {
        flex: 1;
        min-width: 0;
        padding: 12px 16px;
        background: var(--bg-input);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-input);
        font-size: 14px;
        color: var(--text-primary);
        transition: all var(--transition);
        min-height: 44px;
    }
    .form-row input:focus {
        border-color: var(--primary);
        box-shadow: 0 0 0 3px rgba(242,100,25,0.12);
        background: #fff;
    }
    .form-note {
        font-size: 13px;
        color: var(--text-muted);
        margin-top: 10px;
        text-align: center;
    }

    /* Quick help */
    .quick-help {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 16px;
    }
    .quick-help-card {
        background: #fff;
        border: 1px solid var(--border-color);
        border-radius: var(--radius-card);
        padding: 20px 22px;
        transition: all var(--transition);
        text-align: center;
        box-shadow: var(--shadow-card);
    }
    .quick-help-card:hover {
        transform: translateY(-3px);
        border-color: var(--primary-light);
        box-shadow: var(--shadow-card-hover);
    }
    .quick-help-card .qh-icon {
        font-size: 26px;
        display: block;
        margin-bottom: 8px;
    }
    .quick-help-card h3 {
        font-size: 16px;
        font-weight: 600;
        margin-bottom: 4px;
    }
    .quick-help-card p {
        font-size: 13px;
        color: var(--text-secondary);
    }

    /* Footer */
    .site-footer {
        background: var(--bg-dark);
        color: #C9C4BE;
        padding: 56px 0 24px;
    }
    .footer-grid {
        display: grid;
        grid-template-columns: 2fr 1fr 1fr 1fr;
        gap: 32px;
        margin-bottom: 36px;
    }
    .footer-brand .logo {
        color: #fff;
        font-size: 18px;
        margin-bottom: 10px;
        display: inline-block;
    }
    .footer-brand p {
        font-size: 13px;
        line-height: 1.6;
        color: #BBB5AD;
        max-width: 300px;
    }
    .footer-col h4 {
        font-size: 15px;
        font-weight: 600;
        color: #fff;
        margin-bottom: 14px;
    }
    .footer-col a {
        display: block;
        font-size: 13px;
        color: #BBB5AD;
        padding: 6px 0;
        transition: color var(--transition);
    }
    .footer-col a:hover {
        color: var(--primary-light);
    }
    .footer-bottom {
        border-top: 1px solid rgba(255,255,255,0.12);
        padding-top: 20px;
        text-align: center;
        font-size: 13px;
        color: #8A8580;
    }

    /* Responsive */
    @media (max-width: 1024px) {
        .main-nav {
            display: none;
        }
        .header-cta .btn {
            display: none;
        }
        .hamburger {
            display: flex;
        }
        .drawer-overlay {
            display: block;
            pointer-events: none;
        }
        .drawer-overlay.open {
            pointer-events: auto;
        }
        .hero-inner {
            grid-template-columns: 1fr;
            gap: 32px;
        }
        .hero-visual {
            order: 2;
        }
        .hero-content h1 {
            font-size: 30px;
        }
        .news-grid {
            grid-template-columns: repeat(2, 1fr);
        }
        .security-grid {
            grid-template-columns: repeat(2, 1fr);
        }
        .stats-inner {
            grid-template-columns: repeat(3, 1fr);
        }
        .stat-item:nth-child(3) {
            border-right: none;
        }
        .footer-grid {
            grid-template-columns: 1fr 1fr;
        }
    }
    @media (max-width: 767px) {
        .section {
            padding: 40px 0;
        }
        .container {
            padding: 0 16px;
        }
        .header-inner {
            padding: 0 16px;
        }
        .logo {
            font-size: 16px;
        }
        .hero {
            padding: 48px 0 64px;
        }
        .hero-inner {
            padding: 0 16px;
        }
        .hero-content h1 {
            font-size: 26px;
        }
        .hero-actions {
            flex-direction: column;
        }
        .hero-actions .btn {
            width: 100%;
        }
        .news-grid {
            grid-template-columns: 1fr;
        }
        .feature-row,
        .feature-row.reverse {
            grid-template-columns: 1fr;
        }
        .feature-row.reverse .feature-img {
            order: 0;
        }
        .feature-row.reverse .feature-text {
            order: 1;
        }
        .security-grid {
            grid-template-columns: 1fr;
        }
        .stats-inner {
            grid-template-columns: repeat(2, 1fr);
        }
        .stat-item {
            border-right: none;
            padding: 8px 4px;
        }
        .stat-item:nth-child(odd) {
            border-right: 1px solid var(--border-color);
        }
        .version-row {
            flex-direction: column;
            align-items: flex-start;
        }
        .quick-help {
            grid-template-columns: 1fr;
        }
        .footer-grid {
            grid-template-columns: 1fr;
            gap: 24px;
        }
        .hcard {
            width: 260px;
        }
        .resource-card {
            width: 250px;
        }
        .platform-tab {
            padding: 8px 14px;
            font-size: 13px;
        }
        .cta-inner h2 {
            font-size: 22px;
        }
    }
    @media (max-width: 380px) {
        body {
            font-size: 14px;
        }
        .logo {
            font-size: 14px;
        }
        .hero-content h1 {
            font-size: 22px;
        }
        .btn {
            padding: 10px 18px;
            font-size: 14px;
        }
    }

/* roulang page: category1 */
:root {
        --primary: #F26419;
        --primary-dark: #D9531E;
        --primary-light: #FF8C50;
        --secondary: #0E7C66;
        --secondary-light: #00A896;
        --secondary-bg: #E6F3F0;
        --bg-page: #F7F5F0;
        --bg-dark: #181818;
        --bg-card: #FFFFFF;
        --bg-input: #F2EFEA;
        --border-color: #E5E0D8;
        --text-primary: #1A1A1A;
        --text-secondary: #5C5C5C;
        --text-muted: #8A8580;
        --text-on-dark: #FFFFFF;
        --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
        --font-mono: "SF Mono", "Roboto Mono", Consolas, monospace;
        --radius-card: 12px;
        --radius-btn: 8px;
        --radius-input: 6px;
        --radius-badge: 20px;
        --radius-modal: 16px;
        --shadow-card: 0 2px 10px rgba(26,26,26,0.05);
        --shadow-card-hover: 0 10px 28px rgba(26,26,26,0.10);
        --shadow-btn: 0 4px 10px rgba(242,100,25,0.25);
        --transition: 0.22s ease;
        --max-width: 1200px;
    }
    html {
        scroll-behavior: smooth;
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }
    body {
        font-family: var(--font-sans);
        font-size: 15px;
        font-weight: 400;
        line-height: 1.7;
        color: var(--text-primary);
        background-color: var(--bg-page);
        overflow-x: hidden;
    }
    a {
        color: inherit;
        text-decoration: none;
        transition: color var(--transition);
    }
    a:hover {
        color: var(--secondary);
    }
    img {
        max-width: 100%;
        height: auto;
        display: block;
        border-radius: var(--radius-card);
    }
    button,
    input {
        font-family: inherit;
        font-size: inherit;
    }
    button {
        cursor: pointer;
        border: none;
        background: none;
    }
    input {
        outline: none;
    }
    .container {
        max-width: var(--max-width);
        margin: 0 auto;
        padding: 0 24px;
    }
    .section {
        padding: 64px 0;
    }
    .section-alt {
        background-color: #F0EDE6;
    }
    .section-dark {
        background-color: var(--bg-dark);
        color: var(--text-on-dark);
    }
    .section-head {
        margin-bottom: 36px;
    }
    .section-head h2 {
        font-size: 26px;
        font-weight: 700;
        line-height: 1.3;
        color: var(--text-primary);
        margin-bottom: 8px;
    }
    .section-head p {
        font-size: 15px;
        color: var(--text-secondary);
        line-height: 1.6;
        max-width: 680px;
        margin-bottom: 0;
    }
    .section-dark .section-head h2 {
        color: #fff;
    }
    .section-dark .section-head p {
        color: #C9C4BE;
    }
    .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        padding: 12px 26px;
        font-size: 15px;
        font-weight: 600;
        border-radius: var(--radius-btn);
        transition: all var(--transition);
        text-align: center;
        min-height: 44px;
        white-space: nowrap;
        text-decoration: none;
    }
    .btn:focus-visible,
    button:focus-visible,
    a:focus-visible,
    input:focus-visible {
        outline: 2px solid var(--primary);
        outline-offset: 2px;
    }
    .btn-primary {
        background-color: var(--primary);
        color: #fff;
        box-shadow: var(--shadow-btn);
    }
    .btn-primary:hover {
        background-color: var(--primary-dark);
        transform: translateY(-1px);
        color: #fff;
    }
    .btn-primary:active {
        transform: translateY(0);
    }
    .btn-outline {
        background: transparent;
        color: var(--secondary);
        border: 1px solid var(--secondary);
    }
    .btn-outline:hover {
        background-color: var(--secondary-bg);
        color: var(--secondary);
        transform: translateY(-1px);
    }
    .btn-outline:active {
        transform: translateY(0);
    }
    .btn-sm {
        padding: 8px 18px;
        font-size: 14px;
        min-height: 36px;
    }
    .btn:disabled {
        opacity: 0.4;
        pointer-events: none;
    }
    .site-header {
        position: sticky;
        top: 0;
        z-index: 100;
        height: 64px;
        background: rgba(247,245,240,0.92);
        backdrop-filter: blur(10px);
        -webkit-backdrop-filter: blur(10px);
        border-bottom: 1px solid var(--border-color);
    }
    .header-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: 100%;
        max-width: var(--max-width);
        margin: 0 auto;
        padding: 0 24px;
        gap: 20px;
    }
    .logo {
        font-size: 19px;
        font-weight: 700;
        color: var(--text-primary);
        white-space: nowrap;
        letter-spacing: 0.02em;
    }
    .logo .logo-accent {
        color: var(--primary);
    }
    .main-nav {
        display: flex;
        align-items: center;
        gap: 8px;
        flex: 1;
        justify-content: center;
    }
    .main-nav a {
        display: inline-block;
        padding: 8px 14px;
        font-size: 15px;
        font-weight: 500;
        color: var(--text-secondary);
        position: relative;
        white-space: nowrap;
        transition: color var(--transition);
    }
    .main-nav a:hover {
        color: var(--secondary);
    }
    .main-nav a.active {
        color: var(--primary);
        font-weight: 600;
    }
    .main-nav a.active::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 14px;
        right: 14px;
        height: 2px;
        background-color: var(--primary);
        border-radius: 1px;
    }
    .header-cta {
        flex-shrink: 0;
    }
    .hamburger {
        display: none;
        flex-direction: column;
        gap: 5px;
        width: 44px;
        height: 44px;
        align-items: center;
        justify-content: center;
        border-radius: 8px;
        background: none;
    }
    .hamburger span {
        display: block;
        width: 22px;
        height: 2px;
        background-color: var(--text-primary);
        border-radius: 2px;
        transition: all 0.3s ease;
    }
    .mobile-menu {
        display: none;
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        bottom: 0;
        background: #fff;
        z-index: 99;
        padding: 24px;
        flex-direction: column;
        gap: 4px;
        overflow-y: auto;
    }
    .mobile-menu.open {
        display: flex;
    }
    .mobile-menu a {
        display: flex;
        align-items: center;
        min-height: 48px;
        padding: 8px 12px;
        font-size: 16px;
        font-weight: 500;
        color: var(--text-primary);
        border-radius: 8px;
    }
    .mobile-menu a.active {
        color: var(--primary);
        font-weight: 600;
        background: #FFF3EC;
    }
    .mobile-menu .btn {
        margin-top: 16px;
    }
    .mobile-backdrop {
        display: none;
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0,0,0,0.4);
        z-index: 98;
    }
    .mobile-backdrop.open {
        display: block;
    }

    /* Category Hero */
    .category-hero {
        padding: 40px 0 28px;
        background: linear-gradient(135deg, #FFF8F3 0%, #F7F5F0 100%);
        border-bottom: 1px solid var(--border-color);
    }
    .category-hero h1 {
        font-size: 32px;
        font-weight: 700;
        line-height: 1.25;
        margin-bottom: 8px;
        color: var(--text-primary);
    }
    .category-hero h1 .highlight {
        color: var(--primary);
    }
    .category-hero p {
        font-size: 16px;
        color: var(--text-secondary);
        max-width: 760px;
        margin-bottom: 0;
        line-height: 1.7;
    }
    .breadcrumb-bar {
        font-size: 13px;
        color: var(--text-muted);
        margin-bottom: 8px;
    }
    .breadcrumb-bar a {
        color: var(--text-secondary);
    }
    .breadcrumb-bar a:hover {
        color: var(--secondary);
    }
    .breadcrumb-bar .sep {
        margin: 0 6px;
        color: var(--border-color);
    }

    /* Filter Tabs */
    .filter-tabs {
        display: flex;
        flex-wrap: wrap;
        gap: 10px;
        padding: 20px 0;
    }
    .filter-tab {
        display: inline-flex;
        align-items: center;
        padding: 8px 18px;
        font-size: 14px;
        font-weight: 500;
        color: var(--text-secondary);
        background: #fff;
        border: 1px solid var(--border-color);
        border-radius: var(--radius-badge);
        transition: all var(--transition);
        text-decoration: none;
    }
    .filter-tab:hover {
        border-color: var(--primary);
        color: var(--primary);
    }
    .filter-tab:focus-visible {
        outline: 2px solid var(--primary);
        outline-offset: 2px;
    }

    /* Download Grid */
    .download-grid {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
    .download-card {
        background: var(--bg-card);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-card);
        padding: 22px;
        transition: all var(--transition);
        display: flex;
        flex-direction: column;
        gap: 10px;
    }
    .download-card:hover {
        transform: translateY(-2px);
        border-color: var(--primary);
        box-shadow: var(--shadow-card-hover);
    }
    .download-card .card-badge {
        display: inline-block;
        padding: 3px 10px;
        font-size: 12px;
        font-weight: 600;
        color: var(--secondary);
        background: var(--secondary-bg);
        border-radius: var(--radius-badge);
        align-self: flex-start;
    }
    .download-card h3 {
        font-size: 17px;
        font-weight: 600;
        line-height: 1.4;
        color: var(--text-primary);
        margin-bottom: 0;
    }
    .download-card h3 a {
        color: inherit;
    }
    .download-card h3 a:hover {
        color: var(--primary);
    }
    .download-card .card-excerpt {
        font-size: 14px;
        color: var(--text-secondary);
        line-height: 1.6;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
        margin-bottom: 0;
    }
    .download-card .card-meta {
        display: flex;
        align-items: center;
        justify-content: space-between;
        font-size: 13px;
        color: var(--text-muted);
        border-top: 1px solid #F0EDE6;
        padding-top: 12px;
    }
    .download-card .card-meta .meta-time {
        font-family: var(--font-mono);
    }
    .download-card .card-meta .view-detail {
        color: var(--primary);
        font-weight: 500;
    }
    .download-card .card-meta .view-detail:hover {
        color: var(--primary-dark);
    }
    .list-more {
        text-align: center;
        margin-top: 28px;
    }
    .list-more a {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        font-size: 14px;
        font-weight: 600;
        color: var(--secondary);
        padding: 8px 16px;
        border-radius: var(--radius-btn);
        transition: all var(--transition);
        text-decoration: none;
    }
    .list-more a:hover {
        background: var(--secondary-bg);
    }
    .empty-state {
        text-align: center;
        padding: 40px 20px;
        background: var(--bg-card);
        border: 1px dashed var(--border-color);
        border-radius: var(--radius-card);
    }
    .empty-state p {
        font-size: 15px;
        color: var(--text-muted);
        margin: 8px 0 0;
    }

    /* Feature Showcase */
    .feature-showcase {
        display: flex;
        gap: 40px;
        align-items: center;
    }
    .feature-showcase.reverse {
        flex-direction: row-reverse;
    }
    .feature-image {
        flex: 1;
        min-width: 0;
    }
    .feature-image img {
        width: 100%;
        aspect-ratio: 16/9;
        object-fit: cover;
        border-radius: var(--radius-card);
        box-shadow: var(--shadow-card);
    }
    .feature-content {
        flex: 1;
        min-width: 0;
    }
    .feature-content h3 {
        font-size: 22px;
        font-weight: 700;
        line-height: 1.3;
        margin-bottom: 12px;
        color: var(--text-primary);
    }
    .feature-content p {
        font-size: 15px;
        color: var(--text-secondary);
        line-height: 1.7;
        margin-bottom: 16px;
    }
    .feature-stats {
        display: flex;
        flex-wrap: wrap;
        gap: 20px;
    }
    .feature-stat {
        font-size: 13px;
        color: var(--text-muted);
    }
    .feature-stat strong {
        display: block;
        font-size: 20px;
        font-weight: 700;
        color: var(--secondary);
        font-family: var(--font-mono);
    }

    /* Tutorial List */
    .tutorial-list {
        list-style: none;
        margin: 0;
        padding: 0;
        background: var(--bg-card);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-card);
        overflow: hidden;
    }
    .tutorial-list li {
        border-bottom: 1px solid #F0EDE6;
    }
    .tutorial-list li:last-child {
        border-bottom: none;
    }
    .tutorial-list a {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 16px;
        padding: 16px 20px;
        text-decoration: none;
        transition: background var(--transition);
    }
    .tutorial-list a:hover {
        background: #FFF8F3;
    }
    .tutorial-list .tutorial-title {
        font-size: 15px;
        font-weight: 500;
        color: var(--text-primary);
        line-height: 1.5;
    }
    .tutorial-list .tutorial-date {
        font-size: 13px;
        font-family: var(--font-mono);
        color: var(--text-muted);
        white-space: nowrap;
    }

    /* CTA Card */
    .cta-card {
        background: var(--bg-dark);
        border-radius: var(--radius-card);
        padding: 36px 32px;
        text-align: center;
        position: relative;
        overflow: hidden;
    }
    .cta-card::before {
        content: '';
        position: absolute;
        top: -60px;
        right: -60px;
        width: 200px;
        height: 200px;
        background: radial-gradient(circle, rgba(242,100,25,0.35), transparent 70%);
        border-radius: 50%;
        pointer-events: none;
    }
    .cta-card h3 {
        font-size: 22px;
        font-weight: 700;
        color: #fff;
        margin-bottom: 8px;
    }
    .cta-card p {
        font-size: 14px;
        color: #C9C4BE;
        margin-bottom: 20px;
    }
    .cta-card .version-info {
        font-size: 13px;
        font-family: var(--font-mono);
        color: var(--primary-light);
        margin-bottom: 16px;
    }
    .cta-card .btn {
        position: relative;
        z-index: 1;
    }

    /* FAQ */
    .faq-list {
        max-width: 760px;
        margin: 0 auto;
    }
    .faq-item {
        background: var(--bg-card);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-card);
        margin-bottom: 12px;
        overflow: hidden;
        transition: all var(--transition);
    }
    .faq-item:hover {
        border-color: var(--secondary-light);
    }
    .faq-question {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 16px;
        padding: 16px 20px;
        cursor: pointer;
        font-size: 15px;
        font-weight: 600;
        color: var(--text-primary);
        text-align: left;
        width: 100%;
    }
    .faq-question .faq-icon {
        flex-shrink: 0;
        width: 24px;
        height: 24px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        font-size: 18px;
        color: var(--primary);
        transition: transform var(--transition);
    }
    .faq-item.open .faq-icon {
        transform: rotate(45deg);
    }
    .faq-answer {
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
    }
    .faq-item.open .faq-answer {
        max-height: 300px;
    }
    .faq-answer p {
        padding: 0 20px 16px;
        font-size: 14px;
        color: var(--text-secondary);
        line-height: 1.7;
        margin-bottom: 0;
    }

    /* Back Home */
    .back-home {
        display: flex;
        flex-wrap: wrap;
        gap: 16px;
        align-items: center;
        justify-content: center;
    }

    /* Footer */
    .site-footer {
        background-color: var(--bg-dark);
        color: #C9C4BE;
        padding: 56px 0 28px;
    }
    .footer-grid {
        display: grid;
        grid-template-columns: 2fr 1fr 1fr 1fr;
        gap: 32px;
        margin-bottom: 36px;
    }
    .footer-brand .logo {
        color: #fff;
        display: inline-block;
        margin-bottom: 12px;
        font-size: 18px;
    }
    .footer-brand .logo .logo-accent {
        color: var(--primary);
    }
    .footer-brand p {
        font-size: 14px;
        line-height: 1.7;
        color: #8A8580;
        margin-bottom: 0;
        max-width: 320px;
    }
    .footer-col h4 {
        font-size: 14px;
        font-weight: 700;
        color: #fff;
        margin-bottom: 14px;
        letter-spacing: 0.04em;
    }
    .footer-col a {
        display: block;
        font-size: 14px;
        color: #8A8580;
        padding: 5px 0;
        transition: color var(--transition);
        text-decoration: none;
    }
    .footer-col a:hover {
        color: var(--primary-light);
    }
    .footer-bottom {
        border-top: 1px solid rgba(255,255,255,0.1);
        padding-top: 20px;
        text-align: center;
        font-size: 13px;
        color: #6E6A64;
    }
    .footer-bottom p {
        margin-bottom: 0;
    }

    /* Responsive */
    @media (max-width: 1023px) {
        .main-nav {
            display: none;
        }
        .header-cta {
            display: none;
        }
        .hamburger {
            display: flex;
        }
        .footer-grid {
            grid-template-columns: 1fr 1fr;
        }
        .feature-showcase,
        .feature-showcase.reverse {
            flex-direction: column;
        }
        .feature-image img {
            aspect-ratio: 16/7;
        }
    }
    @media (max-width: 767px) {
        .section {
            padding: 44px 0;
        }
        .category-hero h1 {
            font-size: 26px;
        }
        .download-grid {
            grid-template-columns: 1fr;
        }
        .footer-grid {
            grid-template-columns: 1fr;
        }
        .filter-tabs {
            gap: 6px;
        }
        .filter-tab {
            padding: 6px 12px;
            font-size: 13px;
        }
        .cta-card {
            padding: 28px 20px;
        }
        .feature-stats {
            gap: 12px;
        }
        .feature-stat strong {
            font-size: 17px;
        }
    }

/* roulang page: article */
:root {
        --primary: #F26419;
        --primary-dark: #D9531E;
        --primary-light: #FF8C50;
        --secondary: #0E7C66;
        --secondary-light: #00A896;
        --secondary-bg: #E6F3F0;
        --bg-page: #F7F5F0;
        --bg-dark: #181818;
        --bg-card: #FFFFFF;
        --bg-input: #F2EFEA;
        --border-color: #E5E0D8;
        --text-primary: #1A1A1A;
        --text-secondary: #5C5C5C;
        --text-muted: #8A8580;
        --text-on-dark: #FFFFFF;
        --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
        --font-mono: "SF Mono", "Roboto Mono", Consolas, monospace;
        --radius-card: 12px;
        --radius-btn: 8px;
        --radius-input: 6px;
        --radius-badge: 20px;
        --radius-modal: 16px;
        --shadow-card: 0 2px 10px rgba(26,26,26,0.05);
        --shadow-card-hover: 0 10px 28px rgba(26,26,26,0.10);
        --shadow-btn: 0 4px 10px rgba(242,100,25,0.25);
        --transition: 0.22s ease;
        --max-width: 1200px;
    }
    html {
        scroll-behavior: smooth;
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }
    body {
        font-family: var(--font-sans);
        font-size: 15px;
        font-weight: 400;
        line-height: 1.7;
        color: var(--text-primary);
        background-color: var(--bg-page);
        overflow-x: hidden;
    }
    a {
        color: inherit;
        text-decoration: none;
        transition: color var(--transition);
    }
    a:hover {
        color: var(--secondary);
    }
    img {
        max-width: 100%;
        height: auto;
        display: block;
        border-radius: var(--radius-card);
    }
    button,
    input {
        font-family: inherit;
        font-size: inherit;
    }
    button {
        cursor: pointer;
        border: none;
        background: none;
    }
    input {
        outline: none;
    }
    .container {
        max-width: var(--max-width);
        margin: 0 auto;
        padding: 0 24px;
    }
    .section {
        padding: 56px 0;
    }
    .section-alt {
        background-color: #F0EDE6;
    }
    .section-dark {
        background-color: var(--bg-dark);
        color: var(--text-on-dark);
    }
    .section-head {
        margin-bottom: 36px;
    }
    .section-head h2 {
        font-size: 26px;
        font-weight: 700;
        line-height: 1.3;
        color: var(--text-primary);
        margin-bottom: 8px;
    }
    .section-head p {
        font-size: 15px;
        color: var(--text-secondary);
        line-height: 1.6;
        max-width: 680px;
    }
    .section-dark .section-head h2 {
        color: #fff;
    }
    .section-dark .section-head p {
        color: #C9C4BE;
    }
    .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        padding: 12px 26px;
        font-size: 15px;
        font-weight: 600;
        border-radius: var(--radius-btn);
        transition: all var(--transition);
        text-align: center;
        min-height: 44px;
        white-space: nowrap;
    }
    .btn:focus-visible,
    button:focus-visible,
    a:focus-visible,
    input:focus-visible {
        outline: 2px solid var(--primary);
        outline-offset: 2px;
    }
    .btn-primary {
        background-color: var(--primary);
        color: #fff;
        box-shadow: var(--shadow-btn);
    }
    .btn-primary:hover {
        background-color: var(--primary-dark);
        transform: translateY(-1px);
        color: #fff;
    }
    .btn-primary:active {
        transform: translateY(0);
    }
    .btn-outline {
        background: transparent;
        color: var(--secondary);
        border: 1px solid var(--secondary);
    }
    .btn-outline:hover {
        background-color: var(--secondary-bg);
        color: var(--secondary);
        transform: translateY(-1px);
    }
    .btn-outline:active {
        transform: translateY(0);
    }
    .btn-sm {
        padding: 8px 18px;
        font-size: 14px;
        min-height: 36px;
    }
    .btn-block {
        width: 100%;
    }
    .btn:disabled {
        opacity: 0.4;
        pointer-events: none;
    }
    /* Header */
    .site-header {
        position: sticky;
        top: 0;
        z-index: 100;
        height: 64px;
        background: rgba(247,245,240,0.92);
        backdrop-filter: blur(10px);
        -webkit-backdrop-filter: blur(10px);
        border-bottom: 1px solid var(--border-color);
    }
    .header-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: 100%;
        max-width: var(--max-width);
        margin: 0 auto;
        padding: 0 24px;
        gap: 20px;
    }
    .logo {
        font-size: 19px;
        font-weight: 700;
        color: var(--text-primary);
        white-space: nowrap;
        letter-spacing: 0.02em;
    }
    .logo .logo-accent {
        color: var(--primary);
    }
    .main-nav {
        display: flex;
        align-items: center;
        gap: 8px;
        flex: 1;
        justify-content: center;
    }
    .main-nav a {
        display: inline-block;
        padding: 8px 14px;
        font-size: 15px;
        font-weight: 500;
        color: var(--text-secondary);
        position: relative;
        white-space: nowrap;
        transition: color var(--transition);
    }
    .main-nav a:hover {
        color: var(--secondary);
    }
    .main-nav a.active {
        color: var(--primary);
        font-weight: 600;
    }
    .main-nav a.active::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 14px;
        right: 14px;
        height: 2px;
        background-color: var(--primary);
        border-radius: 1px;
    }
    .header-actions {
        display: flex;
        align-items: center;
        gap: 10px;
    }
    .header-btn {
        white-space: nowrap;
    }
    .nav-toggle {
        display: none;
        flex-direction: column;
        justify-content: center;
        gap: 4px;
        width: 40px;
        height: 40px;
        padding: 8px;
        border-radius: var(--radius-btn);
        border: 1px solid var(--border-color);
        background: var(--bg-card);
        transition: all var(--transition);
    }
    .nav-toggle span {
        display: block;
        width: 18px;
        height: 2px;
        background-color: var(--text-primary);
        border-radius: 1px;
        transition: all var(--transition);
    }
    .nav-toggle:hover {
        border-color: var(--primary);
    }
    .mobile-overlay {
        display: none;
        position: fixed;
        inset: 0;
        background: rgba(0,0,0,0.45);
        z-index: 98;
        opacity: 0;
        pointer-events: none;
        transition: opacity 0.25s ease;
    }
    .mobile-overlay.open {
        opacity: 1;
        pointer-events: auto;
    }
    .mobile-nav {
        display: none;
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        z-index: 99;
        background: #fff;
        border-bottom: 1px solid var(--border-color);
        padding: 16px 24px 24px;
        flex-direction: column;
        gap: 4px;
        transform: translateY(-102%);
        transition: transform 0.28s ease;
        box-shadow: 0 16px 32px rgba(26,26,26,0.12);
    }
    .mobile-nav.open {
        transform: translateY(0);
    }
    .mobile-nav a {
        display: flex;
        align-items: center;
        min-height: 44px;
        padding: 6px 4px;
        font-size: 16px;
        font-weight: 500;
        color: var(--text-secondary);
        border-bottom: 1px solid #F0EDE6;
    }
    .mobile-nav a:last-of-type {
        border-bottom: none;
    }
    .mobile-nav a:hover {
        color: var(--secondary);
    }
    .mobile-nav .btn {
        margin-top: 12px;
        min-height: 44px;
    }
    /* Breadcrumb */
    .article-breadcrumb-wrap {
        background: #F0EDE6;
        padding: 16px 0;
        border-bottom: 1px solid var(--border-color);
    }
    .breadcrumb {
        display: flex;
        flex-wrap: wrap;
        align-items: center;
        gap: 8px;
        font-size: 14px;
        color: var(--text-muted);
    }
    .breadcrumb a {
        color: var(--text-secondary);
        transition: color var(--transition);
    }
    .breadcrumb a:hover {
        color: var(--secondary);
        text-decoration: underline;
    }
    .breadcrumb .sep {
        color: var(--text-muted);
        opacity: 0.6;
    }
    .breadcrumb .current {
        color: var(--text-primary);
        font-weight: 500;
    }
    /* Article head */
    .article-head-section {
        padding: 44px 0 28px;
    }
    .article-head-inner {
        max-width: 820px;
        margin: 0 auto;
    }
    .article-title {
        font-size: 32px;
        font-weight: 700;
        line-height: 1.35;
        color: var(--text-primary);
        margin-bottom: 18px;
    }
    .article-meta {
        display: flex;
        flex-wrap: wrap;
        align-items: center;
        gap: 12px 20px;
        font-size: 14px;
        color: var(--text-muted);
    }
    .article-meta-item {
        display: inline-flex;
        align-items: center;
        gap: 6px;
    }
    .article-tag {
        display: inline-flex;
        align-items: center;
        padding: 4px 14px;
        background: var(--secondary-bg);
        color: var(--secondary);
        border-radius: var(--radius-badge);
        font-size: 13px;
        font-weight: 600;
        white-space: nowrap;
    }
    .article-date {
        font-family: var(--font-mono);
        font-size: 13px;
    }
    /* Article body */
    .article-body-section {
        padding: 20px 0 52px;
    }
    .article-content {
        max-width: 800px;
        margin: 0 auto;
        font-size: 16px;
        line-height: 1.8;
        color: var(--text-primary);
    }
    .article-content h2 {
        font-size: 23px;
        font-weight: 700;
        line-height: 1.4;
        margin: 36px 0 14px;
        color: var(--text-primary);
    }
    .article-content h3 {
        font-size: 19px;
        font-weight: 600;
        line-height: 1.45;
        margin: 28px 0 10px;
        color: var(--text-primary);
    }
    .article-content p {
        margin-bottom: 16px;
    }
    .article-content ul,
    .article-content ol {
        margin: 0 0 16px 24px;
        padding: 0;
    }
    .article-content li {
        margin-bottom: 8px;
    }
    .article-content blockquote {
        margin: 22px 0;
        padding: 14px 20px 14px 24px;
        border-left: 4px solid var(--primary);
        background: #F0EDE6;
        border-radius: 0 10px 10px 0;
        color: var(--text-secondary);
    }
    .article-content blockquote p {
        margin-bottom: 0;
    }
    .article-content img {
        margin: 22px auto;
        border-radius: var(--radius-card);
        box-shadow: var(--shadow-card);
    }
    .article-content .article-download-box {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 16px;
        flex-wrap: wrap;
        margin: 26px 0;
        padding: 20px 24px;
        background: #F0EDE6;
        border: 1px solid var(--border-color);
        border-radius: var(--radius-card);
    }
    .article-content .article-download-box p {
        margin: 0;
        color: var(--text-secondary);
        font-size: 15px;
    }
    .empty-state {
        max-width: 800px;
        margin: 0 auto;
        background: var(--bg-card);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-card);
        padding: 48px 28px;
        text-align: center;
        box-shadow: var(--shadow-card);
    }
    .empty-state .empty-icon {
        font-size: 36px;
        margin-bottom: 14px;
        display: block;
    }
    .empty-state p {
        font-size: 16px;
        color: var(--text-secondary);
        margin-bottom: 20px;
    }
    /* Related tools */
    .related-tools-section {
        background: #F0EDE6;
        padding: 52px 0;
    }
    .related-tools-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 20px;
        margin-top: 28px;
    }
    .tool-card {
        background: var(--bg-card);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-card);
        overflow: hidden;
        box-shadow: var(--shadow-card);
        transition: all var(--transition);
        display: flex;
        flex-direction: column;
    }
    .tool-card:hover {
        transform: translateY(-3px);
        box-shadow: var(--shadow-card-hover);
        border-color: var(--primary);
    }
    .tool-card-image {
        position: relative;
        height: 170px;
        background: var(--bg-input);
        overflow: hidden;
    }
    .tool-card-image img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        border-radius: 0;
    }
    .tool-card-body {
        padding: 18px 20px 20px;
        display: flex;
        flex-direction: column;
        flex: 1;
    }
    .tool-card-title {
        font-size: 17px;
        font-weight: 700;
        color: var(--text-primary);
        margin-bottom: 8px;
    }
    .tool-card-text {
        font-size: 14px;
        color: var(--text-secondary);
        line-height: 1.65;
        margin-bottom: 16px;
        flex: 1;
    }
    /* Related recommend */
    .related-recommend-section {
        padding: 52px 0 20px;
    }
    .recommend-list {
        display: grid;
        grid-template-columns: 1fr;
        gap: 12px;
        margin-top: 24px;
    }
    .recommend-item {
        display: block;
        background: var(--bg-card);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-card);
        padding: 16px 22px;
        transition: all var(--transition);
        box-shadow: var(--shadow-card);
    }
    .recommend-item:hover {
        border-color: var(--secondary);
        transform: translateY(-1px);
        box-shadow: var(--shadow-card-hover);
    }
    .recommend-item h3 {
        font-size: 16px;
        font-weight: 600;
        color: var(--text-primary);
        margin-bottom: 6px;
        line-height: 1.45;
    }
    .recommend-item p {
        font-size: 14px;
        color: var(--text-secondary);
        line-height: 1.6;
        margin-bottom: 6px;
    }
    .recommend-item time {
        font-family: var(--font-mono);
        font-size: 13px;
        color: var(--text-muted);
    }
    /* FAQ */
    .article-faq-section {
        padding: 32px 0 52px;
    }
    .faq-list {
        margin-top: 24px;
        display: flex;
        flex-direction: column;
        gap: 12px;
    }
    .faq-item {
        background: var(--bg-card);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-card);
        overflow: hidden;
        box-shadow: var(--shadow-card);
    }
    .faq-question {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 16px;
        width: 100%;
        padding: 16px 20px;
        text-align: left;
        font-size: 15px;
        font-weight: 600;
        color: var(--text-primary);
        background: var(--bg-card);
        transition: background var(--transition);
        min-height: 44px;
    }
    .faq-question:hover {
        background: #FAF8F4;
    }
    .faq-icon {
        flex-shrink: 0;
        width: 24px;
        height: 24px;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 18px;
        color: var(--primary);
        transition: transform 0.28s ease;
    }
    .faq-item.open .faq-icon {
        transform: rotate(45deg);
    }
    .faq-answer {
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease, padding 0.3s ease;
        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: 0;
    }
    /* CTA */
    .article-cta-section {
        padding: 24px 0 52px;
    }
    .article-cta-card {
        background: var(--bg-dark);
        border-radius: var(--radius-card);
        padding: 36px 32px;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 24px;
        flex-wrap: wrap;
        color: var(--text-on-dark);
    }
    .article-cta-card h2 {
        font-size: 23px;
        font-weight: 700;
        margin-bottom: 6px;
        color: #fff;
    }
    .article-cta-card p {
        font-size: 15px;
        color: #C9C4BE;
        margin: 0;
        line-height: 1.6;
    }
    .article-cta-card .version-tag {
        display: inline-flex;
        align-items: center;
        padding: 4px 14px;
        background: rgba(242,100,25,0.18);
        color: var(--primary-light);
        border-radius: var(--radius-badge);
        font-family: var(--font-mono);
        font-size: 13px;
        margin-top: 10px;
    }
    .article-cta-actions {
        display: flex;
        gap: 12px;
        flex-wrap: wrap;
    }
    /* Back */
    .article-back-section {
        padding: 20px 0 56px;
    }
    .back-buttons {
        display: flex;
        gap: 12px;
        flex-wrap: wrap;
        justify-content: center;
    }
    /* Footer */
    .site-footer {
        background: var(--bg-dark);
        color: #C9C4BE;
        padding: 52px 0 0;
    }
    .footer-grid {
        display: grid;
        grid-template-columns: 2fr 1fr 1fr 1fr;
        gap: 32px;
        padding-bottom: 32px;
        border-bottom: 1px solid rgba(255,255,255,0.12);
    }
    .footer-brand .logo {
        display: inline-block;
        margin-bottom: 12px;
        font-size: 20px;
        color: #fff;
    }
    .footer-brand p {
        font-size: 14px;
        line-height: 1.7;
        max-width: 320px;
        margin: 0;
    }
    .footer-col h4 {
        font-size: 16px;
        font-weight: 600;
        color: #fff;
        margin-bottom: 14px;
    }
    .footer-col a {
        display: block;
        font-size: 14px;
        color: #C9C4BE;
        margin-bottom: 8px;
        transition: color var(--transition);
    }
    .footer-col a:hover {
        color: var(--primary-light);
    }
    .footer-bottom {
        padding: 18px 0 20px;
        text-align: center;
        font-size: 13px;
        color: #8A8580;
    }
    .footer-bottom p {
        margin: 0;
    }
    /* Responsive */
    @media (max-width: 1023px) {
        .main-nav {
            display: none;
        }
        .nav-toggle {
            display: flex;
        }
        .mobile-nav,
        .mobile-overlay {
            display: flex;
        }
        .mobile-overlay.open {
            display: flex;
        }
        .mobile-nav {
            display: flex;
        }
        .related-tools-grid {
            grid-template-columns: repeat(2, 1fr);
        }
        .footer-grid {
            grid-template-columns: repeat(2, 1fr);
        }
    }
    @media (max-width: 767px) {
        .section {
            padding: 40px 0;
        }
        .container {
            padding: 0 16px;
        }
        .header-inner {
            padding: 0 16px;
        }
        .header-btn {
            display: none;
        }
        .article-head-section {
            padding: 28px 0 18px;
        }
        .article-title {
            font-size: 24px;
        }
        .related-tools-grid {
            grid-template-columns: 1fr;
        }
        .article-cta-card {
            flex-direction: column;
            text-align: center;
        }
        .article-cta-card h2 {
            font-size: 20px;
        }
        .footer-grid {
            grid-template-columns: 1fr;
            gap: 20px;
        }
        .article-body-section {
            padding: 16px 0 36px;
        }
        .article-content {
            font-size: 15px;
        }
        .article-content h2 {
            font-size: 20px;
        }
        .article-content h3 {
            font-size: 17px;
        }
    }
    @media (max-width: 520px) {
        .article-title {
            font-size: 21px;
        }
        .article-meta {
            gap: 8px 12px;
            font-size: 13px;
        }
        .article-cta-card {
            padding: 24px 18px;
        }
        .article-cta-actions {
            width: 100%;
            flex-direction: column;
        }
        .btn {
            padding: 10px 20px;
            font-size: 14px;
        }
        .tool-card-image {
            height: 150px;
        }
    }

/* roulang page: category3 */
:root {
            --primary: #F26419;
            --primary-dark: #D9531E;
            --primary-light: #FF8C50;
            --secondary: #0E7C66;
            --secondary-light: #00A896;
            --secondary-bg: #E6F3F0;
            --bg-page: #F7F5F0;
            --bg-dark: #181818;
            --bg-card: #FFFFFF;
            --bg-input: #F2EFEA;
            --border-color: #E5E0D8;
            --text-primary: #1A1A1A;
            --text-secondary: #5C5C5C;
            --text-muted: #8A8580;
            --text-on-dark: #FFFFFF;
            --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
            --font-mono: "SF Mono", "Roboto Mono", Consolas, monospace;
            --radius-card: 12px;
            --radius-btn: 8px;
            --radius-input: 6px;
            --radius-badge: 20px;
            --radius-modal: 16px;
            --shadow-card: 0 2px 10px rgba(26, 26, 26, 0.05);
            --shadow-card-hover: 0 10px 28px rgba(26, 26, 26, 0.10);
            --shadow-btn: 0 4px 10px rgba(242, 100, 25, 0.25);
            --transition: 0.22s ease;
            --max-width: 1200px;
        }

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

        body {
            font-family: var(--font-sans);
            font-size: 15px;
            font-weight: 400;
            line-height: 1.7;
            color: var(--text-primary);
            background-color: var(--bg-page);
            overflow-x: hidden;
        }

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

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-card);
        }

        button,
        input {
            font-family: inherit;
            font-size: inherit;
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
        }
        input {
            outline: none;
        }

        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .section {
            padding: 64px 0;
        }
        .section-alt {
            background-color: #F0EDE6;
        }
        .section-dark {
            background-color: var(--bg-dark);
            color: var(--text-on-dark);
        }
        .section-head {
            margin-bottom: 36px;
        }
        .section-head h2 {
            font-size: 26px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--text-primary);
            margin-bottom: 8px;
        }
        .section-head p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.6;
            max-width: 680px;
        }
        .section-dark .section-head h2 {
            color: #fff;
        }
        .section-dark .section-head p {
            color: #C9C4BE;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 26px;
            font-size: 15px;
            font-weight: 600;
            border-radius: var(--radius-btn);
            transition: all var(--transition);
            text-align: center;
            min-height: 44px;
            white-space: nowrap;
        }
        .btn:focus-visible,
        button:focus-visible,
        a:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }
        .btn-primary {
            background-color: var(--primary);
            color: #fff;
            box-shadow: var(--shadow-btn);
        }
        .btn-primary:hover {
            background-color: var(--primary-dark);
            transform: translateY(-1px);
            color: #fff;
        }
        .btn-primary:active {
            transform: translateY(0);
        }
        .btn-outline {
            background: transparent;
            color: var(--secondary);
            border: 1px solid var(--secondary);
        }
        .btn-outline:hover {
            background-color: var(--secondary-bg);
            color: var(--secondary);
            transform: translateY(-1px);
        }
        .btn-outline:active {
            transform: translateY(0);
        }
        .btn-outline-light {
            background: transparent;
            color: #fff;
            border: 1px solid rgba(255, 255, 255, 0.5);
        }
        .btn-outline-light:hover {
            background-color: rgba(255, 255, 255, 0.12);
            color: #fff;
            transform: translateY(-1px);
        }
        .btn-sm {
            padding: 8px 18px;
            font-size: 14px;
            min-height: 36px;
        }
        .btn-block {
            width: 100%;
        }
        .btn:disabled {
            opacity: 0.4;
            pointer-events: none;
        }

        /* Header */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            height: 64px;
            background: rgba(247, 245, 240, 0.92);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border-color);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            gap: 20px;
        }
        .logo {
            font-size: 19px;
            font-weight: 700;
            color: var(--text-primary);
            white-space: nowrap;
            letter-spacing: 0.02em;
            flex-shrink: 0;
        }
        .logo .logo-accent {
            color: var(--primary);
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 8px;
            flex: 1;
            justify-content: center;
        }
        .main-nav a {
            display: inline-block;
            padding: 8px 14px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            position: relative;
            white-space: nowrap;
            transition: color var(--transition);
        }
        .main-nav a:hover {
            color: var(--secondary);
        }
        .main-nav a.active {
            color: var(--primary);
            font-weight: 600;
        }
        .main-nav a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 14px;
            right: 14px;
            height: 2px;
            background-color: var(--primary);
            border-radius: 1px;
        }
        .header-cta {
            flex-shrink: 0;
        }
        .header-cta .btn {
            background-color: var(--primary);
            color: #fff;
            font-weight: 600;
            padding: 10px 22px;
            font-size: 14px;
            min-height: 38px;
            box-shadow: var(--shadow-btn);
            transition: all var(--transition);
        }
        .header-cta .btn:hover {
            background-color: var(--primary-dark);
            color: #fff;
            transform: translateY(-1px);
        }

        /* Mobile nav */
        .nav-toggle {
            display: none;
            flex-direction: column;
            justify-content: center;
            width: 44px;
            height: 44px;
            padding: 8px;
            gap: 5px;
            background: transparent;
            border: none;
            cursor: pointer;
            flex-shrink: 0;
        }
        .nav-toggle span {
            display: block;
            width: 100%;
            height: 2px;
            background-color: var(--text-primary);
            border-radius: 1px;
            transition: all var(--transition);
        }
        .nav-toggle.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .nav-toggle.active span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }
        .nav-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.45);
            z-index: 98;
            opacity: 0;
            transition: opacity 0.3s ease;
        }
        .nav-overlay.show {
            opacity: 1;
        }
        .mobile-drawer {
            display: none;
            position: fixed;
            top: 0;
            right: -280px;
            width: 280px;
            height: 100vh;
            background: #fff;
            z-index: 99;
            transition: right 0.3s ease;
            flex-direction: column;
            padding: 24px 20px;
            box-shadow: -4px 0 20px rgba(0, 0, 0, 0.12);
        }
        .mobile-drawer.open {
            right: 0;
        }
        .mobile-drawer .drawer-header {
            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;
            background: var(--bg-input);
            border-radius: 50%;
            font-size: 20px;
            cursor: pointer;
            color: var(--text-secondary);
        }
        .mobile-drawer .drawer-nav {
            display: flex;
            flex-direction: column;
            gap: 4px;
            flex: 1;
        }
        .mobile-drawer .drawer-nav a {
            display: block;
            padding: 14px 12px;
            font-size: 16px;
            font-weight: 500;
            color: var(--text-primary);
            border-radius: 8px;
            transition: background var(--transition);
        }
        .mobile-drawer .drawer-nav a:hover {
            background: var(--bg-input);
            color: var(--secondary);
        }
        .mobile-drawer .drawer-nav a.active {
            background: var(--secondary-bg);
            color: var(--primary);
            font-weight: 600;
        }
        .mobile-drawer .drawer-cta {
            margin-top: 24px;
        }
        .mobile-drawer .drawer-cta .btn {
            width: 100%;
        }

        /* Category Hero */
        .category-hero {
            background-color: #F0EDE6;
            border-bottom: 1px solid var(--border-color);
            padding: 48px 0 40px;
        }
        .category-hero .breadcrumb-row {
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 12px;
        }
        .category-hero .breadcrumb-row a {
            color: var(--text-secondary);
        }
        .category-hero .breadcrumb-row a:hover {
            color: var(--primary);
        }
        .category-hero h1 {
            font-size: 32px;
            font-weight: 700;
            line-height: 1.2;
            color: var(--text-primary);
            margin-bottom: 10px;
        }
        .category-hero .category-desc {
            font-size: 15px;
            color: var(--text-secondary);
            max-width: 680px;
            line-height: 1.7;
        }

        /* Filter tabs */
        .filter-tabs {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 32px;
        }
        .filter-tabs .tab-chip {
            display: inline-flex;
            align-items: center;
            padding: 8px 20px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-badge);
            transition: all var(--transition);
            white-space: nowrap;
            cursor: pointer;
        }
        .filter-tabs .tab-chip:hover {
            border-color: var(--secondary);
            color: var(--secondary);
        }
        .filter-tabs .tab-chip.active {
            background: var(--secondary-bg);
            border-color: var(--secondary);
            color: var(--secondary);
            font-weight: 600;
        }

        /* Resource grid */
        .resource-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
            gap: 20px;
        }
        .resource-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-card);
            padding: 0;
            overflow: hidden;
            transition: all var(--transition);
            box-shadow: var(--shadow-card);
            display: flex;
            flex-direction: column;
        }
        .resource-card:hover {
            transform: translateY(-3px);
            border-color: var(--primary-light);
            box-shadow: var(--shadow-card-hover);
        }
        .resource-card .card-img {
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: var(--bg-input);
            position: relative;
        }
        .resource-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 0;
        }
        .resource-card .card-badge {
            position: absolute;
            top: 12px;
            left: 12px;
            padding: 4px 14px;
            font-size: 12px;
            font-weight: 600;
            background: rgba(14, 124, 102, 0.92);
            color: #fff;
            border-radius: var(--radius-badge);
            letter-spacing: 0.02em;
        }
        .resource-card .card-body {
            padding: 18px 20px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .resource-card .card-body h3 {
            font-size: 17px;
            font-weight: 600;
            line-height: 1.35;
            margin-bottom: 8px;
            color: var(--text-primary);
        }
        .resource-card .card-body p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 14px;
            flex: 1;
        }
        .resource-card .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 10px;
            font-size: 12px;
            color: var(--text-muted);
            font-family: var(--font-mono);
        }
        .resource-card .card-meta .meta-tag {
            color: var(--secondary);
            font-weight: 600;
        }

        /* Resource feature */
        .resource-feature {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .resource-feature .feature-text h2 {
            font-size: 26px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--text-primary);
            margin-bottom: 12px;
        }
        .resource-feature .feature-text p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 16px;
        }
        .resource-feature .feature-text .feature-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .resource-feature .feature-text .feature-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            padding: 8px 0;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
        }
        .resource-feature .feature-text .feature-list li::before {
            content: '';
            flex-shrink: 0;
            width: 8px;
            height: 8px;
            background: var(--secondary);
            border-radius: 50%;
            margin-top: 8px;
        }
        .resource-feature .feature-img {
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card-hover);
            aspect-ratio: 4 / 3;
            background: var(--bg-input);
        }
        .resource-feature .feature-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 0;
        }

        /* CMS list */
        .cms-list {
            display: flex;
            flex-direction: column;
            gap: 3px;
        }
        .cms-list .cms-item {
            display: flex;
            align-items: flex-start;
            justify-content: space-between;
            gap: 20px;
            padding: 16px 20px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-card);
            transition: all var(--transition);
            text-decoration: none;
        }
        .cms-list .cms-item:hover {
            border-color: var(--secondary);
            box-shadow: var(--shadow-card);
            transform: translateX(2px);
        }
        .cms-list .cms-item .cms-info {
            flex: 1;
            min-width: 0;
        }
        .cms-list .cms-item .cms-info h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            line-height: 1.4;
            margin-bottom: 4px;
            display: -webkit-box;
            -webkit-line-clamp: 1;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .cms-list .cms-item .cms-info p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.5;
            margin-bottom: 6px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .cms-list .cms-item .cms-meta {
            font-size: 12px;
            color: var(--text-muted);
            font-family: var(--font-mono);
            display: flex;
            gap: 12px;
        }
        .cms-list .cms-item .cms-meta span {
            white-space: nowrap;
        }
        .cms-list .cms-item .cms-arrow {
            flex-shrink: 0;
            font-size: 18px;
            color: var(--primary);
            font-weight: 600;
            margin-top: 4px;
        }
        .cms-empty {
            text-align: center;
            padding: 48px 20px;
            color: var(--text-muted);
            font-size: 14px;
            background: var(--bg-card);
            border: 1px dashed var(--border-color);
            border-radius: var(--radius-card);
        }

        /* CTA card */
        .cta-card {
            background: var(--bg-dark);
            color: var(--text-on-dark);
            border-radius: var(--radius-card);
            padding: 40px 36px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            flex-wrap: wrap;
        }
        .cta-card .cta-info h2 {
            font-size: 24px;
            font-weight: 700;
            line-height: 1.3;
            color: #fff;
            margin-bottom: 6px;
        }
        .cta-card .cta-info p {
            font-size: 14px;
            color: #C9C4BE;
            margin-bottom: 0;
        }
        .cta-card .cta-version {
            font-family: var(--font-mono);
            font-size: 13px;
            color: #A8A29C;
        }

        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-card);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item.open {
            border-color: var(--secondary);
            box-shadow: var(--shadow-card);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 20px;
            cursor: pointer;
            width: 100%;
            text-align: left;
            background: none;
            border: none;
            font-family: inherit;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            transition: color var(--transition);
        }
        .faq-question:hover {
            color: var(--secondary);
        }
        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: var(--bg-input);
            font-size: 18px;
            color: var(--text-secondary);
            transition: all var(--transition);
        }
        .faq-item.open .faq-icon {
            background: var(--secondary);
            color: #fff;
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
            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: 0;
        }

        /* Back entry */
        .back-entry {
            display: flex;
            align-items: center;
            justify-content: center;
            flex-wrap: wrap;
            gap: 16px;
        }

        /* Footer */
        .site-footer {
            background: var(--bg-dark);
            color: #C9C4BE;
            padding: 48px 0 24px;
            margin-top: 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 32px;
        }
        .footer-brand .logo {
            display: inline-block;
            margin-bottom: 12px;
            color: #fff;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: #A8A29C;
            max-width: 300px;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 14px;
        }
        .footer-col a {
            display: block;
            padding: 5px 0;
            font-size: 14px;
            color: #C9C4BE;
            transition: color var(--transition);
        }
        .footer-col a:hover {
            color: var(--primary-light);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 20px;
            text-align: center;
            font-size: 13px;
            color: #8A8580;
        }

        /* Responsive */
        @media (max-width: 1023px) {
            .main-nav {
                display: none;
            }
            .nav-toggle {
                display: flex;
            }
            .nav-overlay {
                display: block;
                pointer-events: none;
            }
            .nav-overlay.show {
                pointer-events: auto;
            }
            .mobile-drawer {
                display: flex;
            }
            .header-cta .btn {
                display: none;
            }
            .section {
                padding: 48px 0;
            }
        }

        @media (max-width: 767px) {
            .container {
                padding: 0 16px;
            }
            .section {
                padding: 36px 0;
            }
            .category-hero {
                padding: 32px 0 28px;
            }
            .category-hero h1 {
                font-size: 26px;
            }
            .resource-grid {
                grid-template-columns: 1fr;
            }
            .resource-feature {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .cta-card {
                flex-direction: column;
                align-items: flex-start;
                padding: 28px 22px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .filter-tabs {
                flex-wrap: nowrap;
                overflow-x: auto;
                -webkit-overflow-scrolling: touch;
                padding-bottom: 4px;
                gap: 8px;
            }
            .filter-tabs .tab-chip {
                flex-shrink: 0;
                white-space: nowrap;
            }
            .cms-list .cms-item {
                flex-direction: column;
                gap: 10px;
                padding: 14px 16px;
            }
            .cms-list .cms-item .cms-arrow {
                align-self: flex-end;
            }
        }

        @media (max-width: 520px) {
            .category-hero h1 {
                font-size: 22px;
            }
            .btn {
                font-size: 14px;
                padding: 10px 18px;
            }
            .resource-card .card-body h3 {
                font-size: 15px;
            }
        }

/* roulang page: category2 */
:root {
        --primary: #F26419;
        --primary-dark: #D9531E;
        --primary-light: #FF8C50;
        --secondary: #0E7C66;
        --secondary-light: #00A896;
        --secondary-bg: #E6F3F0;
        --bg-page: #F7F5F0;
        --bg-dark: #181818;
        --bg-card: #FFFFFF;
        --bg-input: #F2EFEA;
        --border-color: #E5E0D8;
        --text-primary: #1A1A1A;
        --text-secondary: #5C5C5C;
        --text-muted: #8A8580;
        --text-on-dark: #FFFFFF;
        --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
        --font-mono: "SF Mono", "Roboto Mono", Consolas, monospace;
        --radius-card: 12px;
        --radius-btn: 8px;
        --radius-input: 6px;
        --radius-badge: 20px;
        --radius-modal: 16px;
        --shadow-card: 0 2px 10px rgba(26,26,26,0.05);
        --shadow-card-hover: 0 10px 28px rgba(26,26,26,0.10);
        --shadow-btn: 0 4px 10px rgba(242,100,25,0.25);
        --transition: 0.22s ease;
        --max-width: 1200px;
    }
    html {
        scroll-behavior: smooth;
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }
    body {
        font-family: var(--font-sans);
        font-size: 15px;
        font-weight: 400;
        line-height: 1.7;
        color: var(--text-primary);
        background-color: var(--bg-page);
        overflow-x: hidden;
    }
    a {
        color: inherit;
        text-decoration: none;
        transition: color var(--transition);
    }
    a:hover {
        color: var(--secondary);
    }
    img {
        max-width: 100%;
        height: auto;
        display: block;
        border-radius: var(--radius-card);
    }
    button,
    input {
        font-family: inherit;
        font-size: inherit;
    }
    button {
        cursor: pointer;
        border: none;
        background: none;
    }
    input {
        outline: none;
    }
    .container {
        max-width: var(--max-width);
        margin: 0 auto;
        padding: 0 24px;
    }
    .section {
        padding: 64px 0;
    }
    .section-alt {
        background-color: #F0EDE6;
    }
    .section-dark {
        background-color: var(--bg-dark);
        color: var(--text-on-dark);
    }
    .section-head {
        margin-bottom: 36px;
    }
    .section-head h2 {
        font-size: 26px;
        font-weight: 700;
        line-height: 1.3;
        color: var(--text-primary);
        margin-bottom: 8px;
    }
    .section-head p {
        font-size: 15px;
        color: var(--text-secondary);
        line-height: 1.6;
        max-width: 680px;
    }
    .section-dark .section-head h2 {
        color: #fff;
    }
    .section-dark .section-head p {
        color: #C9C4BE;
    }
    .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        padding: 12px 26px;
        font-size: 15px;
        font-weight: 600;
        border-radius: var(--radius-btn);
        transition: all var(--transition);
        text-align: center;
        min-height: 44px;
        white-space: nowrap;
    }
    .btn:focus-visible,
    button:focus-visible,
    a:focus-visible,
    input:focus-visible {
        outline: 2px solid var(--primary);
        outline-offset: 2px;
    }
    .btn-primary {
        background-color: var(--primary);
        color: #fff;
        box-shadow: var(--shadow-btn);
    }
    .btn-primary:hover {
        background-color: var(--primary-dark);
        transform: translateY(-1px);
        color: #fff;
    }
    .btn-primary:active {
        transform: translateY(0);
    }
    .btn-outline {
        background: transparent;
        color: var(--secondary);
        border: 1px solid var(--secondary);
    }
    .btn-outline:hover {
        background-color: var(--secondary-bg);
        color: var(--secondary);
        transform: translateY(-1px);
    }
    .btn-outline:active {
        transform: translateY(0);
    }
    .btn-outline-light {
        background: transparent;
        color: #fff;
        border: 1px solid rgba(255,255,255,0.5);
    }
    .btn-outline-light:hover {
        background-color: rgba(255,255,255,0.12);
        color: #fff;
        transform: translateY(-1px);
    }
    .btn-sm {
        padding: 8px 18px;
        font-size: 14px;
        min-height: 36px;
    }
    .btn-block {
        width: 100%;
    }
    .btn:disabled {
        opacity: 0.4;
        pointer-events: none;
    }
    .site-header {
        position: sticky;
        top: 0;
        z-index: 100;
        height: 64px;
        background: rgba(247,245,240,0.92);
        backdrop-filter: blur(10px);
        -webkit-backdrop-filter: blur(10px);
        border-bottom: 1px solid var(--border-color);
    }
    .header-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: 100%;
        max-width: var(--max-width);
        margin: 0 auto;
        padding: 0 24px;
        gap: 20px;
    }
    .logo {
        font-size: 19px;
        font-weight: 700;
        color: var(--text-primary);
        white-space: nowrap;
        letter-spacing: 0.02em;
    }
    .logo .logo-accent {
        color: var(--primary);
    }
    .main-nav {
        display: flex;
        align-items: center;
        gap: 8px;
        flex: 1;
        justify-content: center;
    }
    .main-nav a {
        display: inline-block;
        padding: 8px 14px;
        font-size: 15px;
        font-weight: 500;
        color: var(--text-secondary);
        position: relative;
        white-space: nowrap;
        transition: color var(--transition);
    }
    .main-nav a:hover {
        color: var(--secondary);
    }
    .main-nav a.active {
        color: var(--primary);
        font-weight: 600;
    }
    .main-nav a.active::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 14px;
        right: 14px;
        height: 2px;
        background-color: var(--primary);
        border-radius: 1px;
    }
    .nav-toggle {
        display: none;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        width: 44px;
        height: 44px;
        gap: 5px;
        background: transparent;
        border-radius: var(--radius-btn);
    }
    .nav-toggle span {
        display: block;
        width: 22px;
        height: 2px;
        background-color: var(--text-primary);
        border-radius: 1px;
        transition: all var(--transition);
    }
    .header-download {
        flex-shrink: 0;
    }
    .nav-overlay {
        display: none;
        position: fixed;
        inset: 0;
        background: rgba(0,0,0,0.45);
        z-index: 99;
    }
    .cat-head-section {
        background: linear-gradient(135deg, #F7F5F0 0%, #F2EDE4 100%);
        border-bottom: 1px solid var(--border-color);
        padding: 42px 0 36px;
    }
    .cat-head-section h1 {
        font-size: 34px;
        font-weight: 700;
        line-height: 1.25;
        color: var(--text-primary);
        margin-bottom: 10px;
    }
    .cat-head-section h1 .hl {
        color: var(--primary);
    }
    .cat-head-section p {
        font-size: 16px;
        color: var(--text-secondary);
        max-width: 720px;
        margin: 0;
    }
    .topics-bar {
        padding: 20px 0;
        background: #FFFFFF;
        border-bottom: 1px solid var(--border-color);
        overflow-x: auto;
        white-space: nowrap;
        -webkit-overflow-scrolling: touch;
    }
    .topics-bar .container {
        display: flex;
        gap: 10px;
        align-items: center;
    }
    .topic-chip {
        display: inline-flex;
        align-items: center;
        padding: 8px 16px;
        border-radius: var(--radius-badge);
        font-size: 14px;
        font-weight: 500;
        color: var(--text-secondary);
        background: var(--bg-page);
        border: 1px solid var(--border-color);
        transition: all var(--transition);
        white-space: nowrap;
    }
    .topic-chip:hover {
        border-color: var(--primary);
        color: var(--primary);
        background: #FFF5EF;
    }
    .topic-chip.active {
        background: var(--secondary-bg);
        color: var(--secondary);
        border-color: var(--secondary);
        font-weight: 600;
    }
    .tutorial-grid {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
    .tutorial-card {
        background: var(--bg-card);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-card);
        overflow: hidden;
        box-shadow: var(--shadow-card);
        transition: all var(--transition);
        display: flex;
        flex-direction: column;
    }
    .tutorial-card:hover {
        transform: translateY(-3px);
        box-shadow: var(--shadow-card-hover);
        border-color: var(--primary);
    }
    .tutorial-card-img {
        aspect-ratio: 16 / 7;
        overflow: hidden;
        background: #F0EDE6;
    }
    .tutorial-card-img img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        border-radius: 0;
    }
    .tutorial-card-body {
        padding: 18px 20px 20px;
        display: flex;
        flex-direction: column;
        flex: 1;
        gap: 10px;
    }
    .badge-tag {
        display: inline-flex;
        align-items: center;
        padding: 4px 12px;
        border-radius: var(--radius-badge);
        font-size: 12px;
        font-weight: 600;
        background: #FFF5EF;
        color: var(--primary);
        width: fit-content;
        white-space: nowrap;
    }
    .tutorial-card h3 {
        font-size: 18px;
        font-weight: 700;
        line-height: 1.35;
        margin: 0;
    }
    .tutorial-card h3 a {
        color: var(--text-primary);
        transition: color var(--transition);
    }
    .tutorial-card h3 a:hover {
        color: var(--secondary);
    }
    .tutorial-card p {
        font-size: 14px;
        color: var(--text-secondary);
        line-height: 1.6;
        margin: 0;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }
    .tutorial-meta {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 12px;
        margin-top: auto;
        padding-top: 12px;
        border-top: 1px solid #F0EDE6;
    }
    .tutorial-meta .meta-date {
        font-size: 13px;
        color: var(--text-muted);
        font-family: var(--font-mono);
    }
    .tutorial-meta .meta-cat {
        font-size: 13px;
        color: var(--secondary);
        font-weight: 500;
    }
    .empty-state {
        text-align: center;
        padding: 48px 20px;
        background: var(--bg-card);
        border: 1px dashed var(--border-color);
        border-radius: var(--radius-card);
    }
    .empty-state .empty-icon {
        font-size: 42px;
        margin-bottom: 12px;
        color: var(--text-muted);
    }
    .empty-state p {
        color: var(--text-secondary);
        font-size: 15px;
        margin: 0;
    }
    .value-showcase {
        display: flex;
        align-items: center;
        gap: 36px;
    }
    .value-showcase .value-text {
        flex: 1 1 50%;
    }
    .value-showcase .value-text h2 {
        font-size: 24px;
        font-weight: 700;
        margin-bottom: 14px;
        color: var(--text-primary);
    }
    .value-showcase .value-text p {
        font-size: 15px;
        color: var(--text-secondary);
        line-height: 1.7;
        margin-bottom: 16px;
    }
    .value-points {
        list-style: none;
        padding: 0;
        margin: 0;
        display: flex;
        flex-direction: column;
        gap: 10px;
    }
    .value-points li {
        display: flex;
        align-items: flex-start;
        gap: 10px;
        font-size: 14px;
        color: var(--text-secondary);
    }
    .value-points li::before {
        content: '✓';
        color: var(--secondary);
        font-weight: 700;
        flex-shrink: 0;
        margin-top: 2px;
        width: 18px;
        height: 18px;
        border-radius: 50%;
        background: var(--secondary-bg);
        display: inline-flex;
        align-items: center;
        justify-content: center;
    }
    .value-showcase .value-img {
        flex: 1 1 45%;
    }
    .value-img img {
        width: 100%;
        aspect-ratio: 4 / 3;
        object-fit: cover;
        border-radius: var(--radius-card);
        box-shadow: var(--shadow-card-hover);
    }
    .related-list-wrap {
        background: var(--bg-card);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-card);
        padding: 24px 28px;
        box-shadow: var(--shadow-card);
    }
    .related-list-item {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 16px;
        padding: 16px 0;
        border-bottom: 1px solid #F0EDE6;
    }
    .related-list-item:last-child {
        border-bottom: none;
        padding-bottom: 0;
    }
    .related-list-item:first-child {
        padding-top: 0;
    }
    .related-list-title {
        font-size: 16px;
        font-weight: 600;
        color: var(--text-primary);
        line-height: 1.4;
        transition: color var(--transition);
    }
    .related-list-title:hover {
        color: var(--secondary);
    }
    .related-list-meta {
        font-size: 13px;
        color: var(--text-muted);
        white-space: nowrap;
        font-family: var(--font-mono);
    }
    .cta-card {
        background: var(--bg-dark);
        border-radius: var(--radius-card);
        padding: 36px 40px;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 24px;
        flex-wrap: wrap;
        box-shadow: 0 8px 24px rgba(26,26,26,0.22);
    }
    .cta-card .cta-info h3 {
        font-size: 24px;
        font-weight: 700;
        color: #fff;
        margin-bottom: 8px;
    }
    .cta-card .cta-info p {
        font-size: 15px;
        color: #C9C4BE;
        margin: 0;
    }
    .cta-card .cta-info .version-tag {
        display: inline-block;
        font-family: var(--font-mono);
        font-size: 13px;
        color: var(--primary-light);
        background: rgba(242,100,25,0.15);
        padding: 2px 10px;
        border-radius: var(--radius-badge);
        margin-top: 8px;
    }
    .faq-wrap {
        max-width: 820px;
        margin: 0 auto;
    }
    .faq-item {
        background: var(--bg-card);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-card);
        margin-bottom: 12px;
        overflow: hidden;
        box-shadow: var(--shadow-card);
        transition: all var(--transition);
    }
    .faq-item:focus-within {
        border-color: var(--primary);
    }
    .faq-question {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 16px 20px;
        width: 100%;
        font-size: 16px;
        font-weight: 600;
        color: var(--text-primary);
        background: transparent;
        text-align: left;
        gap: 12px;
        transition: color var(--transition);
    }
    .faq-question:hover {
        color: var(--primary);
    }
    .faq-question .faq-icon {
        flex-shrink: 0;
        width: 22px;
        height: 22px;
        font-size: 20px;
        font-weight: 300;
        color: var(--secondary);
        transition: transform var(--transition);
        display: flex;
        align-items: center;
        justify-content: center;
    }
    .faq-item.open .faq-icon {
        transform: rotate(45deg);
    }
    .faq-answer {
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease, padding 0.3s ease;
        padding: 0 20px;
        color: var(--text-secondary);
        font-size: 14px;
        line-height: 1.7;
    }
    .faq-item.open .faq-answer {
        max-height: 300px;
        padding: 0 20px 18px;
    }
    .back-section-inner {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 16px;
        flex-wrap: wrap;
    }
    .site-footer {
        background-color: var(--bg-dark);
        color: #C9C4BE;
        padding: 52px 0 24px;
    }
    .footer-grid {
        display: grid;
        grid-template-columns: 2fr 1fr 1fr 1fr;
        gap: 32px;
        margin-bottom: 36px;
    }
    .footer-brand .logo {
        color: #fff;
        font-size: 20px;
        display: inline-block;
        margin-bottom: 12px;
    }
    .footer-brand .logo .logo-accent {
        color: var(--primary-light);
    }
    .footer-brand p {
        font-size: 14px;
        color: #C9C4BE;
        line-height: 1.7;
        margin: 0;
        max-width: 320px;
    }
    .footer-col h4 {
        font-size: 15px;
        font-weight: 700;
        color: #fff;
        margin-bottom: 16px;
    }
    .footer-col a {
        display: block;
        font-size: 14px;
        color: #C9C4BE;
        padding: 5px 0;
        transition: color var(--transition);
    }
    .footer-col a:hover {
        color: var(--primary-light);
    }
    .footer-bottom {
        border-top: 1px solid rgba(255,255,255,0.12);
        padding-top: 20px;
        text-align: center;
    }
    .footer-bottom p {
        font-size: 13px;
        color: #8A8580;
        margin: 0;
    }
    @media (max-width: 1023px) {
        .main-nav {
            gap: 2px;
        }
        .main-nav a {
            padding: 8px 10px;
            font-size: 14px;
        }
        .value-showcase {
            flex-direction: column;
            gap: 24px;
        }
        .value-showcase .value-text,
        .value-showcase .value-img {
            flex: 1 1 100%;
            width: 100%;
        }
        .tutorial-grid {
            grid-template-columns: 1fr;
        }
        .footer-grid {
            grid-template-columns: 1fr 1fr;
        }
    }
    @media (max-width: 767px) {
        .section {
            padding: 40px 0;
        }
        .cat-head-section {
            padding: 30px 0 26px;
        }
        .cat-head-section h1 {
            font-size: 28px;
        }
        .nav-toggle {
            display: flex;
        }
        .main-nav {
            position: fixed;
            top: 0;
            right: 0;
            width: 280px;
            height: 100vh;
            background: #FFFFFF;
            flex-direction: column;
            justify-content: flex-start;
            align-items: stretch;
            gap: 4px;
            padding: 76px 20px 32px;
            transform: translateX(100%);
            transition: transform 0.3s ease;
            z-index: 101;
            box-shadow: -4px 0 20px rgba(0,0,0,0.15);
            overflow-y: auto;
        }
        .main-nav.mobile-open {
            transform: translateX(0);
        }
        .main-nav a {
            padding: 14px 16px;
            font-size: 16px;
            border-bottom: 1px solid #F0EDE6;
            white-space: normal;
        }
        .main-nav a.active::after {
            display: none;
        }
        .main-nav a.active {
            background: #FFF5EF;
            border-radius: var(--radius-btn);
            border-bottom-color: #FFF5EF;
        }
        .nav-overlay.visible {
            display: block;
        }
        .header-download {
            display: none;
        }
        .cta-card {
            flex-direction: column;
            align-items: flex-start;
            padding: 28px 22px;
        }
        .cta-card .btn {
            width: 100%;
        }
        .related-list-item {
            flex-direction: column;
            align-items: flex-start;
            gap: 8px;
        }
        .related-list-meta {
            white-space: normal;
        }
        .topics-bar .container {
            padding: 0 16px;
        }
        .footer-grid {
            grid-template-columns: 1fr;
            gap: 22px;
        }
    }
    @media (max-width: 520px) {
        .container {
            padding: 0 16px;
        }
        .tutorial-card-body h3 {
            font-size: 16px;
        }
        .value-showcase .value-text h2 {
            font-size: 20px;
        }
        .cta-card .cta-info h3 {
            font-size: 20px;
        }
        .section-head h2 {
            font-size: 22px;
        }
    }