/* roulang page: index */
:root {
            --color-primary: #1F2A2E;
            --color-accent: #C9A063;
            --color-bg: #F5F1E8;
            --color-card: #FFFFFF;
            --color-text: #252A2D;
            --color-muted: #6B7174;
            --color-warning: #B5472F;
            --color-border: rgba(31, 42, 46, 0.08);
            --color-shadow: rgba(0, 0, 0, 0.06);
            --radius-card: 12px;
            --radius-btn: 8px;
            --radius-input: 8px;
            --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.1);
            --font-sans: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
            --transition-fast: 0.18s ease;
            --transition-base: 0.28s ease;
            --container-max: 1200px;
            --header-height: 64px;
            --section-padding-desktop: 80px;
            --section-padding-mobile: 40px;
        }

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

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

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

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

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

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

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

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

        :focus-visible {
            outline: 3px solid rgba(201, 160, 99, 0.6);
            outline-offset: 2px;
        }

        .container {
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        /* ========== Header / Navigation ========== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-height);
            background-color: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--color-border);
            transition: box-shadow var(--transition-base);
        }

        .site-header.scrolled {
            box-shadow: var(--shadow-sm);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-height);
            gap: 16px;
        }

        .logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 19px;
            color: var(--color-primary);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }

        .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 34px;
            height: 34px;
            border-radius: 8px;
            background-color: var(--color-primary);
            color: var(--color-accent);
            font-size: 18px;
            font-weight: 800;
            flex-shrink: 0;
        }

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

        .main-nav {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
        }

        .nav-link {
            display: inline-flex;
            align-items: center;
            padding: 8px 14px;
            min-height: 44px;
            font-size: 15px;
            font-weight: 500;
            color: var(--color-text);
            border-radius: var(--radius-btn);
            transition: background-color var(--transition-fast), color var(--transition-fast);
            white-space: nowrap;
        }

        .nav-link:hover {
            background-color: rgba(31, 42, 46, 0.05);
            color: var(--color-primary);
        }

        .nav-link.active {
            color: var(--color-accent);
            background-color: rgba(201, 160, 99, 0.1);
            font-weight: 600;
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-height: 44px;
            padding: 10px 20px;
            border-radius: var(--radius-btn);
            background-color: var(--color-accent);
            color: var(--color-primary);
            font-weight: 600;
            font-size: 15px;
            white-space: nowrap;
            transition: background-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
            box-shadow: var(--shadow-sm);
        }

        .nav-cta:hover {
            background-color: #b58d4e;
            color: var(--color-primary);
            box-shadow: var(--shadow-md);
            transform: translateY(-1px);
        }

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

        .mobile-toggle {
            display: none;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            width: 44px;
            height: 44px;
            padding: 8px;
            border-radius: var(--radius-btn);
            border: 1px solid var(--color-border);
            background-color: var(--color-card);
            transition: border-color var(--transition-fast);
        }

        .mobile-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background-color: var(--color-primary);
            margin: 3px 0;
            border-radius: 2px;
            transition: transform var(--transition-base), opacity var(--transition-base);
        }

        .mobile-toggle.is-open span:nth-child(1) {
            transform: translateY(8px) rotate(45deg);
        }
        .mobile-toggle.is-open span:nth-child(2) {
            opacity: 0;
        }
        .mobile-toggle.is-open span:nth-child(3) {
            transform: translateY(-8px) rotate(-45deg);
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            z-index: 999;
            background-color: rgba(255, 255, 255, 0.98);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--color-border);
            box-shadow: var(--shadow-md);
            padding: 12px 24px 24px;
            max-height: calc(100vh - var(--header-height));
            overflow-y: auto;
        }

        .mobile-menu.is-open {
            display: block;
        }

        .mobile-menu-inner {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .mobile-menu .nav-link,
        .mobile-menu .nav-cta {
            width: 100%;
            justify-content: center;
            font-size: 16px;
        }

        .mobile-menu .nav-link {
            min-height: 48px;
            padding: 12px 16px;
        }

        /* ========== Hero ========== */
        .hero {
            position: relative;
            min-height: 560px;
            padding: calc(var(--header-height) + 60px) 0 70px;
            background-color: var(--color-primary);
            background-image: url('/assets/images/da342a820f9b7fd9.webp');
            background-size: cover;
            background-position: center;
            overflow: hidden;
            display: flex;
            align-items: center;
            color: #fff;
        }

        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(31, 42, 46, 0.92) 0%, rgba(31, 42, 46, 0.78) 100%);
            z-index: 1;
        }

        .hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background-image: radial-gradient(rgba(201, 160, 99, 0.12) 1px, transparent 1px);
            background-size: 28px 28px;
            z-index: 2;
            pointer-events: none;
        }

        .hero .container {
            position: relative;
            z-index: 3;
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 48px;
            align-items: center;
        }

        .hero-title {
            font-size: 32px;
            font-weight: 700;
            line-height: 1.3;
            color: #fff;
            letter-spacing: 0.5px;
            margin-bottom: 18px;
        }

        .hero-title .accent {
            color: var(--color-accent);
        }

        .hero-subtitle {
            font-size: 18px;
            font-weight: 400;
            line-height: 1.6;
            color: rgba(255, 255, 255, 0.82);
            margin-bottom: 32px;
            max-width: 480px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-bottom: 36px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-height: 48px;
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            font-size: 16px;
            font-weight: 600;
            letter-spacing: 0.3px;
            transition: background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
            border: 1px solid transparent;
            gap: 8px;
        }

        .btn:active {
            transform: translateY(1px);
        }

        .btn-primary {
            background-color: var(--color-accent);
            color: var(--color-primary);
            border-color: var(--color-accent);
            box-shadow: 0 4px 16px rgba(201, 160, 99, 0.35);
        }

        .btn-primary:hover {
            background-color: #b58d4e;
            border-color: #b58d4e;
            box-shadow: 0 6px 24px rgba(201, 160, 99, 0.45);
            transform: translateY(-1px);
            color: var(--color-primary);
        }

        .btn-secondary {
            background-color: transparent;
            color: var(--color-accent);
            border-color: var(--color-accent);
        }

        .btn-secondary:hover {
            background-color: rgba(201, 160, 99, 0.12);
            border-color: var(--color-accent);
            transform: translateY(-1px);
            color: var(--color-accent);
        }

        .btn-light {
            background-color: rgba(255, 255, 255, 0.12);
            color: #fff;
            border-color: rgba(255, 255, 255, 0.35);
        }

        .btn-light:hover {
            background-color: rgba(255, 255, 255, 0.22);
            border-color: rgba(255, 255, 255, 0.55);
            color: #fff;
        }

        .hero-metrics {
            display: flex;
            flex-wrap: wrap;
            gap: 28px;
            padding-top: 28px;
            border-top: 1px solid rgba(255, 255, 255, 0.15);
        }

        .metric-item {
            display: flex;
            flex-direction: column;
            gap: 2px;
        }

        .metric-value {
            font-size: 20px;
            font-weight: 700;
            color: var(--color-accent);
            line-height: 1.3;
        }

        .metric-label {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.65);
            letter-spacing: 0.3px;
        }

        .hero-visual {
            position: relative;
            min-height: 300px;
            border-radius: var(--radius-card);
            overflow: hidden;
            background-color: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            background-image: url('/assets/images/5dba749d44866144.webp');
            background-size: cover;
            background-position: center;
            box-shadow: var(--shadow-lg);
            display: flex;
            align-items: flex-end;
            padding: 20px;
        }

        .hero-visual-badge {
            background-color: rgba(31, 42, 46, 0.88);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border-radius: var(--radius-card);
            padding: 16px 20px;
            color: #fff;
            font-size: 14px;
            font-weight: 500;
            line-height: 1.5;
            border: 1px solid rgba(201, 160, 99, 0.25);
        }

        .hero-visual-badge strong {
            color: var(--color-accent);
            display: block;
            font-size: 15px;
            margin-bottom: 4px;
        }

        /* ========== Sections ========== */
        .section {
            padding: var(--section-padding-desktop) 0;
        }

        .section-alt {
            background-color: rgba(255, 255, 255, 0.55);
        }

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

        .section-header {
            margin-bottom: 40px;
            max-width: 720px;
        }

        .section-header.centered {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 1.2px;
            text-transform: uppercase;
            color: var(--color-accent);
            margin-bottom: 10px;
        }

        .section-title {
            font-size: 26px;
            font-weight: 700;
            line-height: 1.35;
            color: var(--color-primary);
            letter-spacing: 0.3px;
            margin-bottom: 12px;
        }

        .section-dark .section-title {
            color: #fff;
        }

        .section-desc {
            font-size: 15px;
            line-height: 1.7;
            color: var(--color-muted);
            margin-bottom: 0;
        }

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

        /* ========== Quick Entry ========== */
        .quick-entry-bar {
            background-color: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-md);
            padding: 24px;
            margin-top: -40px;
            position: relative;
            z-index: 5;
        }

        .quick-entry-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }

        .quick-entry-card {
            display: flex;
            flex-direction: column;
            align-items: flex-start;
            gap: 8px;
            padding: 20px;
            min-height: 100px;
            border-radius: 10px;
            background-color: var(--color-bg);
            border: 1px solid var(--color-border);
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
            color: var(--color-text);
        }

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

        .quick-entry-icon {
            width: 36px;
            height: 36px;
            border-radius: 8px;
            background-color: var(--color-primary);
            color: var(--color-accent);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 17px;
            font-weight: 700;
            flex-shrink: 0;
        }

        .quick-entry-title {
            font-size: 16px;
            font-weight: 600;
            line-height: 1.4;
            color: var(--color-primary);
        }

        .quick-entry-desc {
            font-size: 13px;
            color: var(--color-muted);
            line-height: 1.5;
        }

        /* ========== Steps ========== */
        .steps-track {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            counter-reset: step;
        }

        .step-item {
            position: relative;
            padding: 28px 24px 24px;
            background-color: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-sm);
            transition: box-shadow var(--transition-base), transform var(--transition-base);
            counter-increment: step;
        }

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

        .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background-color: var(--color-primary);
            color: var(--color-accent);
            font-weight: 700;
            font-size: 16px;
            margin-bottom: 16px;
        }

        .step-item::before {
            content: counter(step);
            position: absolute;
            top: 26px;
            right: 24px;
            font-size: 48px;
            font-weight: 800;
            color: rgba(31, 42, 46, 0.05);
            line-height: 1;
        }

        .step-title {
            font-size: 18px;
            font-weight: 600;
            color: var(--color-primary);
            margin-bottom: 8px;
        }

        .step-desc {
            font-size: 14px;
            color: var(--color-muted);
            line-height: 1.6;
        }

        /* ========== Security Cards ========== */
        .security-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .security-card {
            padding: 24px 20px;
            background-color: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-sm);
            transition: box-shadow var(--transition-base), border-color var(--transition-base);
        }

        .security-card:hover {
            box-shadow: var(--shadow-md);
            border-color: rgba(201, 160, 99, 0.4);
        }

        .security-card-num {
            font-size: 13px;
            font-weight: 700;
            color: var(--color-accent);
            letter-spacing: 0.5px;
            margin-bottom: 8px;
        }

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

        .security-card-desc {
            font-size: 13px;
            color: var(--color-muted);
            line-height: 1.6;
        }

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

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

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

        .category-item-icon {
            width: 44px;
            height: 44px;
            border-radius: 10px;
            background-color: rgba(201, 160, 99, 0.12);
            color: var(--color-primary);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 19px;
            font-weight: 600;
            flex-shrink: 0;
        }

        .category-item-text {
            display: flex;
            flex-direction: column;
            gap: 2px;
        }

        .category-item-title {
            font-size: 15px;
            font-weight: 600;
            color: var(--color-primary);
            line-height: 1.4;
        }

        .category-item-sub {
            font-size: 12px;
            color: var(--color-muted);
        }

        /* ========== Advantage ========== */
        .advantage-grid {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 48px;
            align-items: center;
        }

        .advantage-content .section-title {
            margin-bottom: 16px;
        }

        .advantage-content p {
            font-size: 15px;
            line-height: 1.7;
            color: var(--color-muted);
            margin-bottom: 24px;
        }

        .advantage-stats {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
        }

        .stat-block {
            background-color: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            padding: 20px;
            text-align: center;
            box-shadow: var(--shadow-sm);
        }

        .stat-number {
            font-size: 26px;
            font-weight: 700;
            color: var(--color-accent);
            line-height: 1.3;
            margin-bottom: 4px;
        }

        .stat-label {
            font-size: 13px;
            color: var(--color-muted);
        }

        .advantage-visual {
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            aspect-ratio: 4 / 3;
            background-color: var(--color-primary);
        }

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

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

        .news-card {
            background-color: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: box-shadow var(--transition-base), transform var(--transition-base), border-color var(--transition-base);
            display: flex;
            flex-direction: column;
        }

        .news-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
            border-color: rgba(201, 160, 99, 0.4);
        }

        .news-card-cover {
            width: 100%;
            aspect-ratio: 16 / 9;
            background-color: #e9e2d6;
            overflow: hidden;
        }

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

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

        .news-card-body {
            padding: 20px 20px 18px;
            display: flex;
            flex-direction: column;
            gap: 8px;
            flex: 1;
        }

        .news-card-cat {
            display: inline-flex;
            align-self: flex-start;
            font-size: 12px;
            font-weight: 600;
            color: var(--color-primary);
            background-color: rgba(201, 160, 99, 0.15);
            padding: 4px 10px;
            border-radius: 20px;
            letter-spacing: 0.3px;
        }

        .news-card-title {
            font-size: 17px;
            font-weight: 600;
            line-height: 1.45;
            color: var(--color-primary);
            margin-bottom: 4px;
        }

        .news-card-excerpt {
            font-size: 14px;
            line-height: 1.6;
            color: var(--color-muted);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            flex: 1;
        }

        .news-card-date {
            font-size: 13px;
            color: var(--color-muted);
            border-top: 1px solid var(--color-border);
            padding-top: 12px;
            margin-top: 4px;
        }

        .empty-note {
            padding: 32px;
            text-align: center;
            color: var(--color-muted);
            background-color: rgba(255, 255, 255, 0.6);
            border: 1px dashed var(--color-border);
            border-radius: var(--radius-card);
            font-size: 15px;
        }

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

        .device-item {
            background-color: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            padding: 28px 24px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            transition: box-shadow var(--transition-base), transform var(--transition-base);
        }

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

        .device-icon {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background-color: rgba(31, 42, 46, 0.06);
            color: var(--color-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            font-weight: 700;
            margin: 0 auto 16px;
        }

        .device-title {
            font-size: 18px;
            font-weight: 600;
            color: var(--color-primary);
            margin-bottom: 8px;
        }

        .device-desc {
            font-size: 14px;
            color: var(--color-muted);
            line-height: 1.6;
        }

        /* ========== FAQ ========== */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background-color: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: 10px;
            box-shadow: var(--shadow-sm);
            transition: box-shadow var(--transition-base), border-color var(--transition-base);
            overflow: hidden;
        }

        .faq-item.is-open {
            box-shadow: var(--shadow-md);
            border-color: rgba(201, 160, 99, 0.35);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            padding: 18px 22px;
            min-height: 56px;
            text-align: left;
            font-size: 16px;
            font-weight: 600;
            color: var(--color-primary);
            background: none;
            border: none;
            cursor: pointer;
            gap: 16px;
            transition: color var(--transition-fast);
        }

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

        .faq-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background-color: rgba(31, 42, 46, 0.06);
            flex-shrink: 0;
            font-size: 18px;
            font-weight: 500;
            transition: transform var(--transition-base), background-color var(--transition-base);
        }

        .faq-item.is-open .faq-icon {
            transform: rotate(45deg);
            background-color: rgba(201, 160, 99, 0.2);
        }

        .faq-answer {
            display: none;
            padding: 0 22px 20px;
            font-size: 14px;
            line-height: 1.7;
            color: var(--color-muted);
        }

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

        /* ========== Updates ========== */
        .updates-list {
            display: flex;
            flex-direction: column;
            gap: 8px;
            max-width: 720px;
        }

        .update-item {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 16px 20px;
            background-color: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-sm);
            transition: border-color var(--transition-fast);
        }

        .update-item:hover {
            border-color: rgba(201, 160, 99, 0.4);
        }

        .update-badge {
            display: inline-flex;
            align-items: center;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 20px;
            background-color: rgba(201, 160, 99, 0.15);
            color: var(--color-primary);
            white-space: nowrap;
            flex-shrink: 0;
        }

        .update-badge.maintenance {
            background-color: rgba(181, 71, 47, 0.12);
            color: var(--color-warning);
        }

        .update-text {
            font-size: 15px;
            color: var(--color-text);
            font-weight: 500;
            flex: 1;
        }

        .update-date {
            font-size: 13px;
            color: var(--color-muted);
            white-space: nowrap;
            flex-shrink: 0;
        }

        .updates-more {
            margin-top: 18px;
            text-align: right;
            font-size: 14px;
            font-weight: 500;
        }

        /* ========== Tutorial ========== */
        .tutorial-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }

        .tutorial-card {
            display: flex;
            flex-direction: column;
            background-color: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: box-shadow var(--transition-base), transform var(--transition-base);
        }

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

        .tutorial-card-cover {
            width: 100%;
            aspect-ratio: 3 / 2;
            overflow: hidden;
            background-color: #e9e2d6;
        }

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

        .tutorial-card-body {
            padding: 22px 24px 24px;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .tutorial-card-title {
            font-size: 19px;
            font-weight: 600;
            color: var(--color-primary);
        }

        .tutorial-card-desc {
            font-size: 14px;
            color: var(--color-muted);
            line-height: 1.6;
        }

        /* ========== Help / CTA ========== */
        .help-section {
            background-color: var(--color-card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-md);
            border: 1px solid var(--color-border);
            padding: 40px;
        }

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

        .help-form {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .form-group {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        .form-label {
            font-size: 14px;
            font-weight: 500;
            color: var(--color-primary);
        }

        .form-input {
            width: 100%;
            min-height: 48px;
            padding: 12px 16px;
            border: 1px solid var(--color-border);
            border-bottom: 2px solid var(--color-primary);
            border-radius: var(--radius-input);
            background-color: var(--color-bg);
            font-size: 15px;
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
        }

        .form-input:focus {
            border-color: var(--color-accent);
            box-shadow: 0 0 0 3px rgba(201, 160, 99, 0.15);
            outline: none;
        }

        .form-submit {
            min-height: 48px;
            padding: 12px 28px;
            background-color: var(--color-primary);
            color: #fff;
            border: none;
            border-radius: var(--radius-btn);
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: background-color var(--transition-fast), transform var(--transition-fast);
            align-self: flex-start;
        }

        .form-submit:hover {
            background-color: #182124;
            transform: translateY(-1px);
        }

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

        .help-info {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .help-info-item {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 14px 16px;
            background-color: var(--color-bg);
            border-radius: 10px;
            font-size: 14px;
            color: var(--color-text);
        }

        .help-info-item strong {
            display: block;
            font-size: 15px;
            color: var(--color-primary);
            margin-bottom: 2px;
        }

        /* ========== Download QR ========== */
        .download-qr-section {
            background-color: var(--color-primary);
            color: #fff;
            padding: var(--section-padding-desktop) 0;
        }

        .download-qr-grid {
            display: grid;
            grid-template-columns: 1fr auto;
            gap: 48px;
            align-items: center;
            justify-content: center;
        }

        .download-qr-text {
            max-width: 480px;
        }

        .download-qr-text h2 {
            font-size: 26px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
        }

        .download-qr-text p {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 24px;
            line-height: 1.7;
        }

        .download-qr-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }

        .download-qr-visual {
            width: 180px;
            height: 180px;
            border-radius: var(--radius-card);
            background-color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: var(--shadow-lg);
            overflow: hidden;
            flex-shrink: 0;
        }

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

        /* ========== Risk Notice ========== */
        .risk-notice {
            background-color: rgba(181, 71, 47, 0.06);
            border: 1px solid rgba(181, 71, 47, 0.2);
            border-radius: var(--radius-card);
            padding: 20px 24px;
            font-size: 13px;
            line-height: 1.6;
            color: #8a4a3a;
            text-align: center;
        }

        /* ========== Footer ========== */
        .site-footer {
            background-color: var(--color-primary);
            color: rgba(255, 255, 255, 0.75);
            padding: 60px 0 24px;
            margin-top: auto;
        }

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

        .footer-brand h3 {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.6);
            max-width: 280px;
        }

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

        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .footer-col a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.65);
            transition: color var(--transition-fast);
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding-top: 20px;
            text-align: center;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.45);
        }

        /* ========== Responsive ========== */
        @media (max-width: 1024px) {
            .hero .container {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .hero-visual {
                min-height: 220px;
            }
            .quick-entry-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .security-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .category-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .advantage-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .news-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-padding-desktop: 40px;
                --header-height: 60px;
            }
            .main-nav {
                display: none;
            }
            .nav-cta {
                display: none;
            }
            .mobile-toggle {
                display: flex;
            }
            .hero {
                min-height: auto;
                padding: calc(var(--header-height) + 40px) 0 48px;
            }
            .hero-title {
                font-size: 25px;
            }
            .hero-subtitle {
                font-size: 15px;
                margin-bottom: 24px;
            }
            .hero-actions {
                gap: 10px;
            }
            .hero-metrics {
                gap: 16px;
                flex-wrap: wrap;
            }
            .section-header {
                margin-bottom: 28px;
            }
            .section-title {
                font-size: 22px;
            }
            .steps-track {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .security-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .category-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .quick-entry-grid {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }
            .quick-entry-card {
                padding: 14px;
                min-height: 80px;
            }
            .device-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .news-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .tutorial-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .help-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .help-section {
                padding: 24px 20px;
            }
            .download-qr-grid {
                grid-template-columns: 1fr;
                text-align: center;
                gap: 24px;
            }
            .download-qr-text {
                margin: 0 auto;
            }
            .download-qr-actions {
                justify-content: center;
            }
            .download-qr-visual {
                margin: 0 auto;
                width: 140px;
                height: 140px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .hero-title {
                font-size: 21px;
            }
            .btn {
                width: 100%;
                justify-content: center;
            }
            .hero-actions {
                flex-direction: column;
                width: 100%;
            }
            .category-grid {
                grid-template-columns: 1fr;
            }
            .quick-entry-grid {
                grid-template-columns: 1fr;
            }
            .advantage-stats {
                grid-template-columns: 1fr;
                gap: 10px;
            }
            .update-item {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
        }

/* roulang page: article */
:root {
            --color-primary: #1F2A2E;
            --color-accent: #C9A063;
            --color-bg: #F5F1E8;
            --color-card: #FFFFFF;
            --color-text: #252A2D;
            --color-muted: #6B7174;
            --color-warning: #B5472F;
            --color-border: rgba(31, 42, 46, 0.08);
            --color-shadow: rgba(0, 0, 0, 0.06);
            --radius-card: 12px;
            --radius-btn: 8px;
            --radius-input: 8px;
            --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.1);
            --font-sans: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
            --transition-fast: 0.18s ease;
            --transition-base: 0.28s ease;
            --container-max: 1200px;
            --header-height: 64px;
            --section-padding-desktop: 80px;
            --section-padding-mobile: 40px;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.8;
            color: var(--color-text);
            background-color: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            margin: 0;
            padding: 0;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--color-accent);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button, input, textarea, select {
            font-family: inherit;
            font-size: inherit;
            color: inherit;
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
        }
        .container {
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        /* Header / Navigation */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-height);
            background-color: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--color-border);
            transition: box-shadow var(--transition-base);
        }
        .site-header.scrolled {
            box-shadow: var(--shadow-sm);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-height);
            gap: 16px;
        }
        .logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 19px;
            color: var(--color-primary);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }
        .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 34px;
            height: 34px;
            border-radius: 8px;
            background-color: var(--color-primary);
            color: var(--color-accent);
            font-size: 18px;
            font-weight: 800;
            flex-shrink: 0;
        }
        .logo:hover {
            color: var(--color-primary);
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-link {
            display: inline-flex;
            align-items: center;
            padding: 8px 14px;
            min-height: 44px;
            font-size: 15px;
            font-weight: 500;
            color: var(--color-text);
            border-radius: var(--radius-btn);
            transition: background-color var(--transition-fast), color var(--transition-fast);
            white-space: nowrap;
        }
        .nav-link:hover {
            background-color: rgba(31, 42, 46, 0.05);
            color: var(--color-primary);
        }
        .nav-link.active {
            color: var(--color-accent);
            background-color: rgba(201, 160, 99, 0.1);
            font-weight: 600;
        }
        .nav-cta {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-height: 44px;
            padding: 10px 20px;
            border-radius: var(--radius-btn);
            background-color: var(--color-accent);
            color: var(--color-primary);
            font-weight: 600;
            font-size: 15px;
            white-space: nowrap;
            transition: background-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
            box-shadow: var(--shadow-sm);
        }
        .nav-cta:hover {
            background-color: #b58d4e;
            color: var(--color-primary);
            box-shadow: var(--shadow-md);
            transform: translateY(-1px);
        }
        .nav-cta:active {
            transform: translateY(0);
            box-shadow: var(--shadow-sm);
        }
        .mobile-toggle {
            display: none;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            width: 44px;
            height: 44px;
            padding: 8px;
            border-radius: var(--radius-btn);
            border: 1px solid var(--color-border);
            background-color: var(--color-card);
        }
        .mobile-toggle span {
            display: block;
            width: 20px;
            height: 2px;
            background-color: var(--color-primary);
            margin: 2px 0;
            transition: transform var(--transition-fast), opacity var(--transition-fast);
        }

        /* Main */
        main {
            flex: 1;
            padding-top: var(--header-height);
        }

        /* Breadcrumbs */
        .breadcrumb-section {
            background-color: var(--color-card);
            border-bottom: 1px solid var(--color-border);
            padding: 16px 0;
        }
        .breadcrumb-nav {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 14px;
            color: var(--color-muted);
        }
        .breadcrumb-nav a {
            color: var(--color-muted);
            transition: color var(--transition-fast);
        }
        .breadcrumb-nav a:hover {
            color: var(--color-accent);
        }
        .breadcrumb-nav .separator {
            color: var(--color-muted);
            opacity: 0.6;
        }
        .breadcrumb-nav .current {
            color: var(--color-text);
            font-weight: 500;
            max-width: 300px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        /* Article section */
        .article-section {
            padding: 48px 0 64px;
        }
        .article-container {
            max-width: 800px;
            margin: 0 auto;
        }
        .article-header {
            margin-bottom: 36px;
        }
        .article-cover {
            width: 100%;
            border-radius: var(--radius-card);
            overflow: hidden;
            margin-bottom: 28px;
            box-shadow: var(--shadow-md);
        }
        .article-cover img {
            width: 100%;
            height: 400px;
            object-fit: cover;
        }
        .article-meta {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            margin-bottom: 16px;
        }
        .article-badge {
            display: inline-flex;
            align-items: center;
            padding: 4px 14px;
            border-radius: 20px;
            background-color: rgba(201, 160, 99, 0.14);
            color: var(--color-accent);
            font-size: 13px;
            font-weight: 600;
        }
        .article-date {
            font-size: 14px;
            color: var(--color-muted);
        }
        .article-views {
            font-size: 14px;
            color: var(--color-muted);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .article-title {
            font-size: 32px;
            line-height: 1.35;
            font-weight: 700;
            color: var(--color-primary);
            margin: 0 0 16px;
            letter-spacing: -0.3px;
        }
        .article-summary {
            font-size: 17px;
            line-height: 1.8;
            color: var(--color-muted);
            margin: 0;
            padding-left: 16px;
            border-left: 3px solid var(--color-accent);
        }

        /* Article body */
        .article-body {
            background-color: var(--color-card);
            border-radius: var(--radius-card);
            padding: 40px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border);
            font-size: 16px;
            line-height: 1.9;
            color: var(--color-text);
        }
        .article-body h2 {
            font-size: 24px;
            line-height: 1.4;
            font-weight: 700;
            color: var(--color-primary);
            margin: 32px 0 16px;
            padding-bottom: 8px;
            border-bottom: 2px solid rgba(201, 160, 99, 0.3);
        }
        .article-body h3 {
            font-size: 20px;
            line-height: 1.4;
            font-weight: 600;
            color: var(--color-primary);
            margin: 24px 0 12px;
        }
        .article-body h4 {
            font-size: 18px;
            line-height: 1.4;
            font-weight: 600;
            color: var(--color-primary);
            margin: 20px 0 10px;
        }
        .article-body p {
            margin: 0 0 16px;
            color: var(--color-text);
        }
        .article-body ul, .article-body ol {
            padding-left: 24px;
            margin: 0 0 16px;
        }
        .article-body li {
            margin-bottom: 8px;
        }
        .article-body blockquote {
            margin: 20px 0;
            padding: 16px 20px;
            border-left: 3px solid var(--color-accent);
            background-color: rgba(201, 160, 99, 0.06);
            border-radius: 0 var(--radius-btn) var(--radius-btn) 0;
            color: var(--color-muted);
            font-size: 15px;
        }
        .article-body table {
            width: 100%;
            border-collapse: collapse;
            margin: 20px 0;
            font-size: 15px;
        }
        .article-body table th, .article-body table td {
            padding: 12px 16px;
            border: 1px solid var(--color-border);
            text-align: left;
        }
        .article-body table th {
            background-color: rgba(31, 42, 46, 0.04);
            font-weight: 600;
            color: var(--color-primary);
        }
        .article-body img {
            border-radius: var(--radius-btn);
            margin: 20px auto;
            max-width: 100%;
            box-shadow: var(--shadow-sm);
        }
        .article-body a {
            color: var(--color-accent);
            font-weight: 500;
            border-bottom: 1px solid rgba(201, 160, 99, 0.4);
            transition: border-color var(--transition-fast), color var(--transition-fast);
        }
        .article-body a:hover {
            color: #b58d4e;
            border-bottom-color: #b58d4e;
        }
        .article-body code {
            background-color: rgba(31, 42, 46, 0.06);
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 14px;
            font-family: "SFMono-Regular", Consolas, "Courier New", monospace;
        }
        .article-body pre {
            background-color: var(--color-primary);
            color: #f0e9dc;
            padding: 20px;
            border-radius: var(--radius-btn);
            overflow-x: auto;
            margin: 20px 0;
            font-size: 14px;
            line-height: 1.7;
        }
        .article-body pre code {
            background: none;
            color: inherit;
            padding: 0;
            font-size: 14px;
        }

        /* Article not found */
        .article-not-found {
            text-align: center;
            padding: 60px 24px;
            background-color: var(--color-card);
            border-radius: var(--radius-card);
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-sm);
        }
        .article-not-found h2 {
            font-size: 24px;
            color: var(--color-primary);
            margin-bottom: 12px;
        }
        .article-not-found p {
            color: var(--color-muted);
            margin-bottom: 24px;
        }
        .article-not-found .back-home-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 24px;
            border-radius: var(--radius-btn);
            background-color: var(--color-accent);
            color: var(--color-primary);
            font-weight: 600;
            transition: background-color var(--transition-fast), transform var(--transition-fast);
        }
        .article-not-found .back-home-btn:hover {
            background-color: #b58d4e;
            color: var(--color-primary);
            transform: translateY(-1px);
        }

        /* Tips box */
        .article-tips {
            margin-top: 28px;
            padding: 20px 24px;
            background-color: rgba(201, 160, 99, 0.07);
            border: 1px solid rgba(201, 160, 99, 0.25);
            border-left: 4px solid var(--color-accent);
            border-radius: var(--radius-btn);
            display: flex;
            gap: 14px;
            align-items: flex-start;
        }
        .article-tips .tips-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background-color: var(--color-accent);
            color: var(--color-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 14px;
        }
        .article-tips .tips-content h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--color-primary);
            margin: 0 0 8px;
        }
        .article-tips .tips-content p {
            font-size: 14px;
            color: var(--color-text);
            margin: 0;
            line-height: 1.7;
        }

        /* Related articles */
        .related-section {
            margin-top: 40px;
        }
        .related-section .section-heading {
            font-size: 20px;
            font-weight: 700;
            color: var(--color-primary);
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid rgba(201, 160, 99, 0.3);
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
            gap: 16px;
        }
        .related-item {
            display: block;
            background-color: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            padding: 20px;
            transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-fast);
            box-shadow: var(--shadow-sm);
        }
        .related-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: var(--color-primary);
            color: var(--color-text);
        }
        .related-item-title {
            display: block;
            font-size: 16px;
            font-weight: 600;
            color: var(--color-primary);
            margin-bottom: 8px;
            line-height: 1.5;
        }
        .related-item-summary {
            display: block;
            font-size: 14px;
            color: var(--color-muted);
            line-height: 1.6;
            margin-bottom: 10px;
        }
        .related-item-date {
            display: block;
            font-size: 13px;
            color: var(--color-muted);
            opacity: 0.8;
        }
        .related-empty {
            padding: 24px;
            text-align: center;
            color: var(--color-muted);
            font-size: 14px;
            background-color: var(--color-card);
            border-radius: var(--radius-card);
            border: 1px dashed var(--color-border);
        }

        /* Back navigation */
        .back-nav {
            margin-top: 32px;
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: center;
        }
        .back-nav a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 10px 22px;
            min-height: 44px;
            border-radius: var(--radius-btn);
            border: 1px solid var(--color-border);
            background-color: var(--color-card);
            font-size: 14px;
            font-weight: 500;
            color: var(--color-text);
            transition: border-color var(--transition-fast), background-color var(--transition-fast), color var(--transition-fast);
        }
        .back-nav a:hover {
            border-color: var(--color-accent);
            background-color: rgba(201, 160, 99, 0.08);
            color: var(--color-primary);
        }
        .back-nav a.primary-back {
            background-color: var(--color-accent);
            color: var(--color-primary);
            border-color: var(--color-accent);
            font-weight: 600;
        }
        .back-nav a.primary-back:hover {
            background-color: #b58d4e;
            border-color: #b58d4e;
            color: var(--color-primary);
        }

        /* Download/Support light CTA */
        .article-cta {
            margin-top: 36px;
            padding: 28px;
            background-color: var(--color-primary);
            border-radius: var(--radius-card);
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
            box-shadow: var(--shadow-md);
        }
        .article-cta .cta-text {
            color: #f0e9dc;
        }
        .article-cta .cta-text h3 {
            font-size: 18px;
            font-weight: 600;
            margin: 0 0 6px;
        }
        .article-cta .cta-text p {
            font-size: 14px;
            color: rgba(240, 233, 220, 0.75);
            margin: 0;
        }
        .article-cta .cta-actions {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
        }
        .article-cta .cta-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 22px;
            min-height: 44px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 14px;
            transition: background-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
        }
        .article-cta .cta-btn.download-btn {
            background-color: var(--color-accent);
            color: var(--color-primary);
        }
        .article-cta .cta-btn.download-btn:hover {
            background-color: #b58d4e;
            transform: translateY(-1px);
        }
        .article-cta .cta-btn.support-btn {
            background-color: transparent;
            color: var(--color-accent);
            border: 1px solid var(--color-accent);
        }
        .article-cta .cta-btn.support-btn:hover {
            background-color: rgba(201, 160, 99, 0.15);
            transform: translateY(-1px);
        }

        /* Disclaimer */
        .disclaimer {
            margin-top: 28px;
            padding: 16px 20px;
            background-color: rgba(181, 71, 47, 0.06);
            border: 1px solid rgba(181, 71, 47, 0.2);
            border-radius: var(--radius-btn);
            font-size: 13px;
            color: var(--color-warning);
            line-height: 1.7;
            text-align: center;
        }

        /* Footer */
        .site-footer {
            background-color: var(--color-primary);
            color: rgba(245, 241, 232, 0.85);
            padding: 56px 0 24px;
            margin-top: 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 40px;
        }
        .footer-brand h3 {
            font-size: 20px;
            font-weight: 700;
            color: #f0e9dc;
            margin: 0 0 12px;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(245, 241, 232, 0.7);
            margin: 0;
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--color-accent);
            margin: 0 0 14px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul li a {
            font-size: 14px;
            color: rgba(245, 241, 232, 0.75);
            transition: color var(--transition-fast);
        }
        .footer-col ul li a:hover {
            color: var(--color-accent);
        }
        .footer-bottom {
            border-top: 1px solid rgba(245, 241, 232, 0.12);
            padding-top: 20px;
            text-align: center;
            font-size: 13px;
            color: rgba(245, 241, 232, 0.5);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .article-body {
                padding: 28px;
            }
        }
        @media (max-width: 768px) {
            .mobile-toggle {
                display: flex;
            }
            .main-nav {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                flex-direction: column;
                align-items: stretch;
                background-color: var(--color-card);
                border-bottom: 1px solid var(--color-border);
                box-shadow: var(--shadow-md);
                padding: 12px 16px;
                gap: 4px;
                display: none;
            }
            .main-nav.open {
                display: flex;
            }
            .nav-link {
                width: 100%;
                justify-content: flex-start;
                padding: 12px 16px;
            }
            .nav-cta {
                margin-top: 8px;
                width: 100%;
            }
            .header-inner {
                gap: 8px;
            }
            .article-title {
                font-size: 26px;
            }
            .article-cover img {
                height: 240px;
            }
            .article-body {
                padding: 20px;
                font-size: 15px;
            }
            .article-body h2 {
                font-size: 21px;
            }
            .article-body h3 {
                font-size: 18px;
            }
            .article-cta {
                flex-direction: column;
                text-align: center;
                align-items: stretch;
            }
            .article-cta .cta-actions {
                justify-content: center;
            }
            .related-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .article-section {
                padding: 32px 0 48px;
            }
            .breadcrumb-nav .current {
                max-width: 160px;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .article-title {
                font-size: 22px;
            }
            .article-summary {
                font-size: 15px;
            }
            .article-cover img {
                height: 180px;
            }
            .article-body {
                padding: 16px;
                font-size: 14px;
            }
            .article-body h2 {
                font-size: 19px;
            }
            .article-body h3 {
                font-size: 17px;
            }
            .back-nav a {
                padding: 8px 16px;
                font-size: 13px;
            }
            .article-cta .cta-btn {
                padding: 10px 16px;
                font-size: 13px;
            }
        }

/* roulang page: category1 */
:root {
            --color-primary: #1F2A2E;
            --color-accent: #C9A063;
            --color-bg: #F5F1E8;
            --color-card: #FFFFFF;
            --color-text: #252A2D;
            --color-muted: #6B7174;
            --color-warning: #B5472F;
            --color-border: rgba(31, 42, 46, 0.08);
            --color-shadow: rgba(0, 0, 0, 0.06);
            --radius-card: 12px;
            --radius-btn: 8px;
            --radius-input: 8px;
            --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.1);
            --font-sans: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
            --transition-fast: 0.18s ease;
            --transition-base: 0.28s ease;
            --container-max: 1200px;
            --header-height: 64px;
            --section-padding-desktop: 72px;
            --section-padding-mobile: 40px;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.8;
            color: var(--color-text);
            background-color: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            margin: 0;
            padding-top: var(--header-height);
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--color-accent);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button, input, textarea, select {
            font-family: inherit;
            font-size: inherit;
            color: inherit;
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
        }
        .container {
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        /* ========== Header / Navigation ========== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-height);
            background-color: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--color-border);
            transition: box-shadow var(--transition-base);
        }
        .site-header.scrolled {
            box-shadow: var(--shadow-sm);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-height);
            gap: 16px;
        }
        .logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 19px;
            color: var(--color-primary);
            letter-spacing: 0.5px;
            white-space: nowrap;
            flex-shrink: 0;
        }
        .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 34px;
            height: 34px;
            border-radius: 8px;
            background-color: var(--color-primary);
            color: var(--color-accent);
            font-size: 18px;
            font-weight: 800;
            flex-shrink: 0;
        }
        .logo:hover {
            color: var(--color-primary);
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-link {
            display: inline-flex;
            align-items: center;
            padding: 8px 14px;
            min-height: 44px;
            font-size: 15px;
            font-weight: 500;
            color: var(--color-text);
            border-radius: var(--radius-btn);
            transition: background-color var(--transition-fast), color var(--transition-fast);
            white-space: nowrap;
        }
        .nav-link:hover {
            background-color: rgba(31, 42, 46, 0.05);
            color: var(--color-primary);
        }
        .nav-link.active {
            color: var(--color-accent);
            background-color: rgba(201, 160, 99, 0.1);
            font-weight: 600;
        }
        .nav-cta {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-height: 44px;
            padding: 10px 20px;
            border-radius: var(--radius-btn);
            background-color: var(--color-accent);
            color: var(--color-primary);
            font-weight: 600;
            font-size: 15px;
            white-space: nowrap;
            flex-shrink: 0;
            transition: background-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
            box-shadow: var(--shadow-sm);
        }
        .nav-cta:hover {
            background-color: #b58d4e;
            color: var(--color-primary);
            box-shadow: var(--shadow-md);
            transform: translateY(-1px);
        }
        .nav-cta:active {
            transform: translateY(0);
            box-shadow: var(--shadow-sm);
        }
        .nav-cta:focus-visible,
        .nav-link:focus-visible,
        .btn:focus-visible,
        .topic-anchor:focus-visible,
        .guide-link:focus-visible,
        .faq-trigger:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 2px;
        }
        .mobile-toggle {
            display: none;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            width: 44px;
            height: 44px;
            padding: 8px;
            border-radius: var(--radius-btn);
            border: 1px solid var(--color-border);
            background-color: var(--color-card);
            gap: 4px;
            flex-shrink: 0;
        }
        .mobile-toggle span {
            display: block;
            width: 20px;
            height: 2px;
            background-color: var(--color-primary);
            border-radius: 2px;
            transition: transform var(--transition-fast), opacity var(--transition-fast);
        }
        .mobile-toggle.open span:nth-child(1) {
            transform: translateY(6px) rotate(45deg);
        }
        .mobile-toggle.open span:nth-child(2) {
            opacity: 0;
        }
        .mobile-toggle.open span:nth-child(3) {
            transform: translateY(-6px) rotate(-45deg);
        }
        .mobile-menu {
            display: none;
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            bottom: 0;
            background-color: rgba(255, 255, 255, 0.98);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            z-index: 999;
            padding: 20px 24px;
            overflow-y: auto;
        }
        .mobile-menu.open {
            display: block;
        }
        .mobile-menu ul {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .mobile-menu .nav-link {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 16px;
            font-size: 16px;
            font-weight: 500;
            border-radius: var(--radius-btn);
            min-height: 48px;
        }
        .mobile-menu .nav-cta {
            display: flex;
            align-items: center;
            justify-content: center;
            margin-top: 16px;
            width: 100%;
            padding: 14px 20px;
            font-size: 16px;
        }
        /* ========== Main ========== */
        main {
            flex: 1;
        }
        section {
            padding: var(--section-padding-desktop) 0;
        }
        .section-alt {
            background-color: #fff;
            border-top: 1px solid var(--color-border);
            border-bottom: 1px solid var(--color-border);
        }
        .section-label {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 2px;
            color: var(--color-accent);
            text-transform: uppercase;
            margin-bottom: 10px;
        }
        .section-title {
            font-size: 26px;
            font-weight: 700;
            color: var(--color-primary);
            line-height: 1.35;
            margin: 0 0 8px;
        }
        .section-desc {
            font-size: 15px;
            color: var(--color-muted);
            max-width: 640px;
            line-height: 1.75;
            margin: 0;
        }
        /* ========== Category Page Header ========== */
        .category-header {
            background-color: var(--color-primary);
            color: #fff;
            padding: 48px 0 40px;
            position: relative;
            overflow: hidden;
        }
        .category-header::after {
            content: "";
            position: absolute;
            top: -60px;
            right: -40px;
            width: 240px;
            height: 240px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(201, 160, 99, 0.18), transparent 70%);
            pointer-events: none;
        }
        .category-header .container {
            position: relative;
            z-index: 1;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 6px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.65);
            margin-bottom: 16px;
            list-style: none;
            padding: 0;
        }
        .breadcrumb li {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .breadcrumb li:not(:last-child)::after {
            content: "›";
            color: rgba(255, 255, 255, 0.4);
            font-size: 16px;
            margin-left: 4px;
        }
        .breadcrumb a {
            color: rgba(255, 255, 255, 0.7);
            transition: color var(--transition-fast);
        }
        .breadcrumb a:hover {
            color: var(--color-accent);
        }
        .breadcrumb .current {
            color: #fff;
            font-weight: 600;
        }
        .category-header h1 {
            font-size: 32px;
            font-weight: 700;
            color: #fff;
            margin: 0 0 10px;
            line-height: 1.3;
        }
        .category-header .header-desc {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.75);
            max-width: 620px;
            margin: 0;
            line-height: 1.7;
        }
        /* ========== Topic Anchor Bar ========== */
        .topic-anchor-bar {
            background-color: #fff;
            border-bottom: 1px solid var(--color-border);
            position: sticky;
            top: var(--header-height);
            z-index: 100;
            padding: 0;
        }
        .topic-anchor-bar .container {
            display: flex;
            align-items: center;
            gap: 8px;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
            padding-top: 0;
            padding-bottom: 0;
        }
        .topic-anchor-bar .container::-webkit-scrollbar {
            display: none;
        }
        .topic-anchor {
            display: inline-flex;
            align-items: center;
            white-space: nowrap;
            padding: 12px 16px;
            min-height: 44px;
            font-size: 14px;
            font-weight: 500;
            color: var(--color-muted);
            border-bottom: 2px solid transparent;
            transition: color var(--transition-fast), border-color var(--transition-fast);
            flex-shrink: 0;
        }
        .topic-anchor:hover {
            color: var(--color-primary);
            border-bottom-color: var(--color-accent);
        }
        .topic-anchor.active {
            color: var(--color-accent);
            border-bottom-color: var(--color-accent);
            font-weight: 600;
        }
        /* ========== Directory + Card List ========== */
        .directory-layout {
            display: grid;
            grid-template-columns: 260px 1fr;
            gap: 32px;
            align-items: start;
        }
        .directory-sidebar {
            position: sticky;
            top: calc(var(--header-height) + 60px);
            background-color: #fff;
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            padding: 20px;
            box-shadow: var(--shadow-sm);
        }
        .directory-sidebar h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--color-primary);
            margin: 0 0 12px;
        }
        .directory-sidebar ul {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 2px;
        }
        .directory-sidebar a {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 10px 12px;
            font-size: 14px;
            color: var(--color-muted);
            border-radius: 6px;
            min-height: 42px;
            transition: background-color var(--transition-fast), color var(--transition-fast);
        }
        .directory-sidebar a:hover {
            background-color: rgba(31, 42, 46, 0.05);
            color: var(--color-primary);
        }
        .directory-sidebar a.active {
            background-color: rgba(201, 160, 99, 0.1);
            color: var(--color-accent);
            font-weight: 600;
        }
        .directory-sidebar .dir-icon {
            width: 18px;
            height: 18px;
            flex-shrink: 0;
            border-radius: 4px;
            background-color: var(--color-primary);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: var(--color-accent);
            font-size: 10px;
            font-weight: 700;
        }
        .dir-card-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .dir-card {
            background-color: #fff;
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            padding: 20px;
            display: grid;
            grid-template-columns: 160px 1fr;
            gap: 20px;
            box-shadow: var(--shadow-sm);
            transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
        }
        .dir-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: rgba(31, 42, 46, 0.18);
        }
        .dir-card-image {
            width: 160px;
            height: 100px;
            border-radius: 8px;
            overflow: hidden;
            flex-shrink: 0;
            background-color: #eee;
            align-self: center;
        }
        .dir-card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .dir-card-body {
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            gap: 8px;
        }
        .dir-card-header {
            display: flex;
            align-items: flex-start;
            justify-content: space-between;
            gap: 12px;
            flex-wrap: wrap;
        }
        .dir-card-title {
            font-size: 17px;
            font-weight: 700;
            color: var(--color-primary);
            margin: 0;
            line-height: 1.4;
        }
        .dir-card-tag {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 10px;
            border-radius: 20px;
            background-color: rgba(201, 160, 99, 0.12);
            color: #8a6c38;
            white-space: nowrap;
        }
        .dir-card-tag.android {
            background-color: rgba(76, 175, 80, 0.1);
            color: #3e8e41;
        }
        .dir-card-tag.ios {
            background-color: rgba(66, 133, 244, 0.1);
            color: #3a6bb5;
        }
        .dir-card-desc {
            font-size: 14px;
            color: var(--color-muted);
            line-height: 1.65;
            margin: 0;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .dir-card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: var(--color-muted);
        }
        .dir-card-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--color-accent);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: gap var(--transition-fast), color var(--transition-fast);
        }
        .dir-card-link:hover {
            color: #b58d4e;
            gap: 8px;
        }
        /* ========== Quick Guide Steps ========== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
            margin-top: 32px;
        }
        .step-card {
            background-color: #fff;
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            padding: 24px 20px;
            text-align: left;
            box-shadow: var(--shadow-sm);
            transition: transform var(--transition-base), box-shadow var(--transition-base);
            position: relative;
        }
        .step-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background-color: var(--color-primary);
            color: var(--color-accent);
            font-weight: 700;
            font-size: 16px;
            margin-bottom: 12px;
        }
        .step-card h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--color-primary);
            margin: 0 0 8px;
            line-height: 1.4;
        }
        .step-card p {
            font-size: 14px;
            color: var(--color-muted);
            line-height: 1.65;
            margin: 0;
        }
        /* ========== FAQ ========== */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
            margin-top: 32px;
            max-width: 820px;
        }
        .faq-item {
            background-color: #fff;
            border: 1px solid var(--color-border);
            border-radius: 10px;
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: box-shadow var(--transition-base), border-color var(--transition-base);
        }
        .faq-item.open {
            box-shadow: var(--shadow-md);
            border-color: rgba(31, 42, 46, 0.18);
        }
        .faq-trigger {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 20px;
            width: 100%;
            font-size: 15px;
            font-weight: 600;
            color: var(--color-primary);
            text-align: left;
            min-height: 52px;
            transition: background-color var(--transition-fast);
        }
        .faq-trigger:hover {
            background-color: rgba(31, 42, 46, 0.03);
        }
        .faq-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background-color: rgba(201, 160, 99, 0.12);
            color: var(--color-accent);
            font-size: 18px;
            font-weight: 600;
            flex-shrink: 0;
            transition: transform var(--transition-base), background-color var(--transition-base);
        }
        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            background-color: var(--color-accent);
            color: var(--color-primary);
        }
        .faq-panel {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-base);
        }
        .faq-panel-inner {
            padding: 0 20px 18px;
            font-size: 14px;
            color: var(--color-muted);
            line-height: 1.7;
        }
        /* ========== Tool Entry ========== */
        .tool-entry-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            margin-top: 24px;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            min-height: 48px;
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 15px;
            transition: background-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
            text-decoration: none;
            white-space: nowrap;
        }
        .btn-primary {
            background-color: var(--color-accent);
            color: var(--color-primary);
            border: 1px solid var(--color-accent);
            box-shadow: var(--shadow-sm);
        }
        .btn-primary:hover {
            background-color: #b58d4e;
            border-color: #b58d4e;
            color: var(--color-primary);
            box-shadow: var(--shadow-md);
            transform: translateY(-1px);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: var(--shadow-sm);
        }
        .btn-outline {
            background-color: transparent;
            color: var(--color-primary);
            border: 1px solid var(--color-primary);
        }
        .btn-outline:hover {
            background-color: rgba(31, 42, 46, 0.05);
            color: var(--color-primary);
            border-color: var(--color-primary);
        }
        .btn-outline:active {
            transform: translateY(0);
        }
        .btn-sm {
            min-height: 40px;
            padding: 8px 18px;
            font-size: 14px;
        }
        /* ========== View More ========== */
        .view-more-wrap {
            text-align: center;
            margin-top: 24px;
        }
        .view-more-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 15px;
            font-weight: 600;
            color: var(--color-accent);
            padding: 10px 20px;
            min-height: 44px;
            border-radius: var(--radius-btn);
            border: 1px solid rgba(201, 160, 99, 0.4);
            transition: background-color var(--transition-fast), gap var(--transition-fast);
        }
        .view-more-link:hover {
            background-color: rgba(201, 160, 99, 0.08);
            color: var(--color-accent);
            gap: 10px;
        }
        /* ========== Footer ========== */
        .site-footer {
            background-color: var(--color-primary);
            color: rgba(255, 255, 255, 0.75);
            padding: 56px 0 0;
            margin-top: auto;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 32px;
            padding-bottom: 40px;
        }
        .footer-brand h3 {
            font-size: 19px;
            font-weight: 700;
            color: #fff;
            margin: 0 0 12px;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.6);
            max-width: 280px;
            margin: 0;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin: 0 0 14px;
        }
        .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer-col a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            display: inline-flex;
            align-items: center;
            min-height: 32px;
            transition: color var(--transition-fast);
        }
        .footer-col a:hover {
            color: var(--color-accent);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 20px 0;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.45);
            text-align: center;
        }
        /* ========== Responsive ========== */
        @media (max-width: 1024px) {
            .main-nav .nav-link {
                padding: 8px 10px;
                font-size: 14px;
            }
            .nav-cta {
                padding: 10px 14px;
                font-size: 14px;
            }
            .directory-layout {
                grid-template-columns: 220px 1fr;
                gap: 20px;
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .dir-card {
                grid-template-columns: 120px 1fr;
                gap: 14px;
            }
            .dir-card-image {
                width: 120px;
                height: 80px;
            }
        }
        @media (max-width: 768px) {
            :root {
                --header-height: 60px;
                --section-padding-desktop: 40px;
            }
            body {
                padding-top: var(--header-height);
            }
            .main-nav {
                display: none;
            }
            .nav-cta {
                display: none;
            }
            .mobile-toggle {
                display: flex;
            }
            .category-header {
                padding: 32px 0 28px;
            }
            .category-header h1 {
                font-size: 24px;
            }
            .category-header .header-desc {
                font-size: 14px;
            }
            .section-title {
                font-size: 20px;
            }
            .directory-layout {
                grid-template-columns: 1fr;
            }
            .directory-sidebar {
                position: static;
                display: none;
            }
            .dir-card {
                grid-template-columns: 1fr;
                gap: 12px;
                padding: 16px;
            }
            .dir-card-image {
                width: 100%;
                height: 140px;
            }
            .dir-card-header {
                flex-direction: column;
                gap: 6px;
            }
            .dir-card-tag {
                align-self: flex-start;
            }
            .steps-grid {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .step-card {
                padding: 18px 16px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .footer-brand {
                grid-column: span 2;
            }
            .tool-entry-grid {
                flex-direction: column;
                align-items: stretch;
            }
            .tool-entry-grid .btn {
                width: 100%;
            }
            .topic-anchor-bar .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .topic-anchor {
                padding: 10px 12px;
                font-size: 13px;
                min-height: 40px;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .category-header h1 {
                font-size: 20px;
            }
            .section-title {
                font-size: 18px;
            }
            .dir-card {
                padding: 14px;
            }
            .dir-card-image {
                height: 110px;
            }
            .dir-card-title {
                font-size: 15px;
            }
            .faq-trigger {
                font-size: 14px;
                padding: 14px 16px;
            }
            .faq-panel-inner {
                font-size: 13px;
                padding: 0 16px 14px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .footer-brand {
                grid-column: span 1;
            }
            .footer-col {
                border-top: 1px solid rgba(255, 255, 255, 0.08);
                padding-top: 16px;
            }
            .breadcrumb {
                font-size: 13px;
            }
        }

/* roulang page: category2 */
:root {
            --color-primary: #1F2A2E;
            --color-accent: #C9A063;
            --color-bg: #F5F1E8;
            --color-card: #FFFFFF;
            --color-text: #252A2D;
            --color-muted: #6B7174;
            --color-warning: #B5472F;
            --color-border: rgba(31, 42, 46, 0.08);
            --color-shadow: rgba(0, 0, 0, 0.06);
            --radius-card: 12px;
            --radius-btn: 8px;
            --radius-input: 8px;
            --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.1);
            --font-sans: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
            --transition-fast: 0.18s ease;
            --transition-base: 0.28s ease;
            --container-max: 1200px;
            --header-height: 64px;
            --section-padding-desktop: 64px;
            --section-padding-mobile: 40px;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.8;
            color: var(--color-text);
            background-color: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            padding-top: var(--header-height);
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--color-accent);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button, input, textarea, select {
            font-family: inherit;
            font-size: inherit;
            color: inherit;
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
        }
        .container {
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        /* Header */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-height);
            background-color: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--color-border);
            transition: box-shadow var(--transition-base);
        }
        .site-header.scrolled {
            box-shadow: var(--shadow-sm);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-height);
            gap: 16px;
        }
        .logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 19px;
            color: var(--color-primary);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }
        .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 34px;
            height: 34px;
            border-radius: 8px;
            background-color: var(--color-primary);
            color: var(--color-accent);
            font-size: 18px;
            font-weight: 800;
            flex-shrink: 0;
        }
        .logo:hover {
            color: var(--color-primary);
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-link {
            display: inline-flex;
            align-items: center;
            padding: 8px 14px;
            min-height: 44px;
            font-size: 15px;
            font-weight: 500;
            color: var(--color-text);
            border-radius: var(--radius-btn);
            transition: background-color var(--transition-fast), color var(--transition-fast);
            white-space: nowrap;
        }
        .nav-link:hover {
            background-color: rgba(31, 42, 46, 0.05);
            color: var(--color-primary);
        }
        .nav-link.active {
            color: var(--color-accent);
            background-color: rgba(201, 160, 99, 0.1);
            font-weight: 600;
        }
        .nav-cta {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-height: 44px;
            padding: 10px 20px;
            border-radius: var(--radius-btn);
            background-color: var(--color-accent);
            color: var(--color-primary);
            font-weight: 600;
            font-size: 15px;
            white-space: nowrap;
            transition: background-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
            box-shadow: var(--shadow-sm);
        }
        .nav-cta:hover {
            background-color: #b58d4e;
            color: var(--color-primary);
            box-shadow: var(--shadow-md);
            transform: translateY(-1px);
        }
        .nav-cta:active {
            transform: translateY(0);
            box-shadow: var(--shadow-sm);
        }
        .mobile-toggle {
            display: none;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            width: 44px;
            height: 44px;
            padding: 8px;
            border-radius: var(--radius-btn);
            border: 1px solid var(--color-border);
            background-color: var(--color-card);
        }
        .mobile-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background-color: var(--color-primary);
            margin: 3px 0;
            transition: transform var(--transition-fast), opacity var(--transition-fast);
        }
        /* Main content */
        main {
            flex: 1;
        }
        section {
            padding-top: var(--section-padding-desktop);
            padding-bottom: var(--section-padding-desktop);
        }
        .page-banner {
            background-color: var(--color-primary);
            color: #fff;
            padding-top: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid var(--color-border);
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 16px;
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: rgba(255, 255, 255, 0.8);
            transition: color var(--transition-fast);
        }
        .breadcrumb a:hover {
            color: var(--color-accent);
        }
        .breadcrumb .sep {
            color: rgba(255, 255, 255, 0.4);
        }
        .page-banner h1 {
            font-size: 28px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .page-banner .banner-desc {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.85);
            max-width: 600px;
            margin: 0;
        }
        .subtopic-anchors {
            background-color: var(--color-card);
            border-bottom: 1px solid var(--color-border);
            padding-top: 16px;
            padding-bottom: 16px;
        }
        .anchor-list {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .anchor-link {
            display: inline-flex;
            align-items: center;
            min-height: 40px;
            padding: 6px 14px;
            border-radius: 20px;
            background-color: var(--color-bg);
            color: var(--color-text);
            font-size: 14px;
            font-weight: 500;
            transition: background-color var(--transition-fast), color var(--transition-fast);
            border: 1px solid var(--color-border);
        }
        .anchor-link:hover {
            background-color: var(--color-primary);
            color: #fff;
        }
        .post-list-section {
            background-color: var(--color-bg);
        }
        .list-layout {
            display: grid;
            grid-template-columns: 260px 1fr;
            gap: 32px;
        }
        .list-sidebar {
            background-color: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            padding: 20px;
            height: fit-content;
            position: sticky;
            top: calc(var(--header-height) + 24px);
        }
        .list-sidebar h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--color-primary);
            margin-bottom: 12px;
        }
        .sidebar-menu {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .sidebar-menu li {
            margin-bottom: 4px;
        }
        .sidebar-menu a {
            display: block;
            padding: 8px 12px;
            border-radius: var(--radius-btn);
            font-size: 14px;
            color: var(--color-muted);
            transition: background-color var(--transition-fast), color var(--transition-fast);
        }
        .sidebar-menu a:hover,
        .sidebar-menu a.active {
            background-color: rgba(201, 160, 99, 0.1);
            color: var(--color-primary);
            font-weight: 500;
        }
        .post-cards {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }
        .post-card {
            background-color: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            overflow: hidden;
            transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
            display: flex;
            flex-direction: column;
        }
        .post-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: rgba(201, 160, 99, 0.4);
        }
        .post-card .card-img {
            aspect-ratio: 16 / 9;
            background-color: #eee;
            position: relative;
            overflow: hidden;
        }
        .post-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .post-card .card-body {
            padding: 16px 18px 20px;
            display: flex;
            flex-direction: column;
            gap: 8px;
            flex: 1;
        }
        .post-card .card-tags {
            display: flex;
            gap: 6px;
            flex-wrap: wrap;
        }
        .post-card .badge {
            background-color: rgba(201, 160, 99, 0.15);
            color: #8a6a35;
            font-size: 12px;
            padding: 2px 8px;
            border-radius: 12px;
            font-weight: 500;
        }
        .post-card h3 {
            font-size: 17px;
            font-weight: 600;
            line-height: 1.5;
            margin: 0;
        }
        .post-card h3 a {
            color: var(--color-text);
            transition: color var(--transition-fast);
        }
        .post-card h3 a:hover {
            color: var(--color-accent);
        }
        .post-card .card-excerpt {
            font-size: 14px;
            color: var(--color-muted);
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin: 0;
        }
        .post-card .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-top: auto;
            padding-top: 8px;
            border-top: 1px solid var(--color-border);
            font-size: 13px;
            color: var(--color-muted);
        }
        .empty-state {
            grid-column: 1 / -1;
            text-align: center;
            padding: 40px 20px;
            background-color: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            color: var(--color-muted);
        }
        .list-more {
            text-align: center;
            margin-top: 24px;
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-height: 44px;
            padding: 8px 24px;
            border-radius: var(--radius-btn);
            border: 1px solid var(--color-primary);
            color: var(--color-primary);
            font-weight: 500;
            font-size: 15px;
            transition: background-color var(--transition-fast), color var(--transition-fast);
        }
        .btn-outline:hover {
            background-color: var(--color-primary);
            color: #fff;
        }
        .quick-guide {
            background-color: var(--color-card);
        }
        .section-title {
            font-size: 24px;
            font-weight: 700;
            color: var(--color-primary);
            margin-bottom: 24px;
            line-height: 1.4;
        }
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .step-item {
            background-color: var(--color-bg);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            padding: 20px;
            text-align: center;
            transition: transform var(--transition-base), box-shadow var(--transition-base);
        }
        .step-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .step-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background-color: var(--color-primary);
            color: var(--color-accent);
            font-weight: 700;
            margin-bottom: 12px;
        }
        .step-item h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--color-primary);
            margin-bottom: 6px;
        }
        .step-item p {
            font-size: 14px;
            color: var(--color-muted);
            margin: 0;
        }
        .faq-section {
            background-color: var(--color-bg);
        }
        .accordion-item {
            background-color: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: 10px;
            margin-bottom: 12px;
            overflow: hidden;
            transition: box-shadow var(--transition-base);
        }
        .accordion-item:hover {
            box-shadow: var(--shadow-sm);
        }
        .accordion-header {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 16px 18px;
            background: none;
            border: none;
            text-align: left;
            font-size: 16px;
            font-weight: 600;
            color: var(--color-primary);
            min-height: 44px;
            cursor: pointer;
            gap: 12px;
        }
        .accordion-header .icon {
            flex-shrink: 0;
            width: 22px;
            height: 22px;
            position: relative;
            transition: transform var(--transition-fast);
        }
        .accordion-header .icon::before,
        .accordion-header .icon::after {
            content: '';
            position: absolute;
            background-color: var(--color-primary);
            border-radius: 2px;
            transition: transform var(--transition-fast), opacity var(--transition-fast);
        }
        .accordion-header .icon::before {
            top: 50%;
            left: 0;
            width: 100%;
            height: 2px;
            transform: translateY(-50%);
        }
        .accordion-header .icon::after {
            top: 0;
            left: 50%;
            width: 2px;
            height: 100%;
            transform: translateX(-50%);
            opacity: 1;
        }
        .accordion-item.open .accordion-header .icon::after {
            transform: translateX(-50%) scaleY(0);
            opacity: 0;
        }
        .accordion-body {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-base);
            padding: 0 18px;
        }
        .accordion-item.open .accordion-body {
            max-height: 500px;
            padding: 0 18px 18px;
        }
        .accordion-body p {
            margin: 0;
            font-size: 15px;
            color: var(--color-muted);
            line-height: 1.8;
        }
        .related-tools {
            background-color: var(--color-card);
            border-top: 1px solid var(--color-border);
        }
        .tools-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: flex-start;
        }
        .tool-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-height: 48px;
            padding: 10px 28px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 15px;
            transition: background-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
        }
        .tool-btn.primary {
            background-color: var(--color-primary);
            color: #fff;
        }
        .tool-btn.primary:hover {
            background-color: #141c1f;
            transform: translateY(-1px);
        }
        .tool-btn.accent {
            background-color: var(--color-accent);
            color: var(--color-primary);
        }
        .tool-btn.accent:hover {
            background-color: #b58d4e;
            transform: translateY(-1px);
        }
        .tool-btn.outline {
            background-color: transparent;
            border: 1px solid var(--color-primary);
            color: var(--color-primary);
        }
        .tool-btn.outline:hover {
            background-color: var(--color-primary);
            color: #fff;
        }
        /* Footer */
        .site-footer {
            background-color: var(--color-primary);
            color: rgba(255,255,255,0.8);
            padding-top: 48px;
            padding-bottom: 24px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            margin-bottom: 32px;
        }
        .footer-brand h3 {
            color: #fff;
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            margin: 0;
            color: rgba(255,255,255,0.7);
        }
        .footer-col h4 {
            color: var(--color-accent);
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 16px;
        }
        .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .footer-col li {
            margin-bottom: 10px;
        }
        .footer-col a {
            color: rgba(255,255,255,0.7);
            font-size: 14px;
            transition: color var(--transition-fast);
        }
        .footer-col a:hover {
            color: var(--color-accent);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 20px;
            text-align: center;
            font-size: 13px;
            color: rgba(255,255,255,0.5);
        }
        /* Responsive */
        @media (max-width: 1024px) {
            :root {
                --section-padding-desktop: 48px;
            }
            .list-layout {
                grid-template-columns: 1fr;
            }
            .list-sidebar {
                position: static;
                display: none;
            }
            .post-cards {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 768px) {
            :root {
                --header-height: 60px;
                --section-padding-desktop: 40px;
            }
            body {
                padding-top: var(--header-height);
            }
            .main-nav {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background-color: var(--color-card);
                flex-direction: column;
                align-items: stretch;
                gap: 0;
                padding: 12px 16px;
                box-shadow: var(--shadow-md);
                border-bottom: 1px solid var(--color-border);
                max-height: 0;
                overflow: hidden;
                transition: max-height var(--transition-base);
                display: flex;
            }
            .main-nav.open {
                max-height: 480px;
            }
            .nav-link {
                border-radius: 0;
                border-bottom: 1px solid var(--color-border);
                min-height: 48px;
            }
            .nav-cta {
                margin-top: 10px;
                width: 100%;
            }
            .mobile-toggle {
                display: flex;
            }
            .header-inner {
                gap: 8px;
            }
            .page-banner h1 {
                font-size: 22px;
            }
            .post-cards {
                grid-template-columns: 1fr;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .logo {
                font-size: 16px;
            }
            .logo-mark {
                width: 30px;
                height: 30px;
                font-size: 15px;
            }
            .anchor-list {
                flex-direction: column;
                align-items: stretch;
            }
            .anchor-link {
                justify-content: center;
            }
        }
        /* Focus visible */
        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible,
        select:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 2px;
        }
        .btn-outline:focus-visible,
        .tool-btn:focus-visible,
        .nav-cta:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 2px;
        }

/* roulang page: category3 */
:root {
            --color-primary: #1F2A2E;
            --color-accent: #C9A063;
            --color-bg: #F5F1E8;
            --color-card: #FFFFFF;
            --color-text: #252A2D;
            --color-muted: #6B7174;
            --color-warning: #B5472F;
            --color-border: rgba(31, 42, 46, 0.08);
            --color-shadow: rgba(0, 0, 0, 0.06);
            --radius-card: 12px;
            --radius-btn: 8px;
            --radius-input: 8px;
            --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.1);
            --font-sans: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
            --transition-fast: 0.18s ease;
            --transition-base: 0.28s ease;
            --container-max: 1200px;
            --header-height: 64px;
            --section-padding-desktop: 72px;
            --section-padding-mobile: 40px;
        }

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

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

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

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

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

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

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

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

        .container {
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        /* ========== Header / Navigation ========== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-height);
            background-color: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--color-border);
            transition: box-shadow var(--transition-base);
        }

        .site-header.scrolled {
            box-shadow: var(--shadow-sm);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-height);
            gap: 16px;
        }

        .logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 19px;
            color: var(--color-primary);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }

        .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 34px;
            height: 34px;
            border-radius: 8px;
            background-color: var(--color-primary);
            color: var(--color-accent);
            font-size: 18px;
            font-weight: 800;
            flex-shrink: 0;
        }

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

        .main-nav {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-link {
            display: inline-flex;
            align-items: center;
            padding: 8px 14px;
            min-height: 44px;
            font-size: 15px;
            font-weight: 500;
            color: var(--color-text);
            border-radius: var(--radius-btn);
            transition: background-color var(--transition-fast), color var(--transition-fast);
            white-space: nowrap;
        }

        .nav-link:hover {
            background-color: rgba(31, 42, 46, 0.05);
            color: var(--color-primary);
        }

        .nav-link.active {
            color: var(--color-accent);
            background-color: rgba(201, 160, 99, 0.1);
            font-weight: 600;
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-height: 44px;
            padding: 10px 20px;
            border-radius: var(--radius-btn);
            background-color: var(--color-accent);
            color: var(--color-primary);
            font-weight: 600;
            font-size: 15px;
            white-space: nowrap;
            transition: background-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
            box-shadow: var(--shadow-sm);
        }

        .nav-cta:hover {
            background-color: #b58d4e;
            color: var(--color-primary);
            box-shadow: var(--shadow-md);
            transform: translateY(-1px);
        }

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

        .mobile-toggle {
            display: none;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            width: 44px;
            height: 44px;
            padding: 8px;
            border-radius: var(--radius-btn);
            border: 1px solid var(--color-border);
            background-color: var(--color-card);
            transition: background-color var(--transition-fast);
        }

        .mobile-toggle span {
            display: block;
            width: 20px;
            height: 2px;
            background-color: var(--color-primary);
            border-radius: 2px;
            margin: 3px 0;
            transition: background-color var(--transition-fast), transform var(--transition-fast);
        }

        .mobile-toggle:hover {
            background-color: rgba(31, 42, 46, 0.05);
        }

        .mobile-toggle:focus,
        .btn:focus,
        a:focus,
        .faq-question:focus {
            outline: 2px solid var(--color-accent);
            outline-offset: 2px;
        }

        /* ========== Category Page Header ========== */
        .page-header {
            padding-top: calc(var(--header-height) + 48px);
            padding-bottom: 32px;
            background-color: #FDFBF6;
            border-bottom: 1px solid var(--color-border);
        }

        .page-header .container {
            max-width: 1200px;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--color-muted);
            margin-bottom: 12px;
            flex-wrap: wrap;
        }

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

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

        .breadcrumb .separator {
            color: var(--color-muted);
            user-select: none;
        }

        .page-header-inner {
            display: flex;
            gap: 32px;
            align-items: center;
        }

        .page-header-content {
            flex: 1 1 60%;
        }

        .page-header-content h1 {
            font-size: 30px;
            line-height: 1.3;
            color: var(--color-primary);
            font-weight: 700;
            letter-spacing: 0.3px;
            margin-bottom: 12px;
        }

        .page-header-content .subtitle {
            font-size: 16px;
            line-height: 1.8;
            color: var(--color-muted);
            max-width: 640px;
        }

        .page-header-image {
            flex: 0 0 240px;
            max-width: 240px;
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-md);
        }

        .page-header-image img {
            width: 100%;
            height: 160px;
            object-fit: cover;
            border-radius: var(--radius-card);
        }

        /* ========== Subtopic Anchor Bar ========== */
        .subtopic-bar {
            padding: 20px 0;
            background-color: var(--color-card);
            border-bottom: 1px solid var(--color-border);
            position: relative;
            z-index: 5;
        }

        .subtopic-bar .container {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .subtopic-bar a {
            display: inline-flex;
            align-items: center;
            min-height: 40px;
            padding: 8px 16px;
            border-radius: 999px;
            background-color: var(--color-bg);
            color: var(--color-text);
            font-size: 14px;
            font-weight: 500;
            border: 1px solid var(--color-border);
            transition: background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
            white-space: nowrap;
        }

        .subtopic-bar a:hover {
            background-color: rgba(201, 160, 99, 0.12);
            border-color: var(--color-accent);
            color: var(--color-primary);
        }

        /* ========== Guide Main Section ========== */
        .guide-main {
            padding: var(--section-padding-desktop) 0;
            background-color: var(--color-bg);
        }

        .guide-layout {
            display: grid;
            grid-template-columns: 240px 1fr;
            gap: 32px;
        }

        .guide-sidebar {
            background-color: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            padding: 20px 16px;
            box-shadow: var(--shadow-sm);
            align-self: start;
            position: sticky;
            top: calc(var(--header-height) + 24px);
        }

        .guide-sidebar h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--color-primary);
            margin-bottom: 16px;
            padding-bottom: 12px;
            border-bottom: 1px solid var(--color-border);
            letter-spacing: 0.3px;
        }

        .guide-sidebar ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        .guide-sidebar ul a {
            display: block;
            padding: 10px 12px;
            border-radius: var(--radius-btn);
            font-size: 14px;
            color: var(--color-text);
            transition: background-color var(--transition-fast), color var(--transition-fast);
        }

        .guide-sidebar ul a:hover {
            background-color: rgba(201, 160, 99, 0.08);
            color: var(--color-accent);
        }

        .guide-cards {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .guide-card {
            background-color: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            padding: 22px 24px;
            box-shadow: var(--shadow-sm);
            transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .guide-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: rgba(31, 42, 46, 0.18);
        }

        .guide-card-head {
            display: flex;
            align-items: flex-start;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
        }

        .guide-card h2 {
            font-size: 18px;
            font-weight: 600;
            color: var(--color-primary);
            line-height: 1.4;
            margin: 0;
            flex: 1 1 auto;
        }

        .guide-card .card-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
            align-items: center;
        }

        .badge-tag {
            display: inline-flex;
            align-items: center;
            padding: 4px 10px;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 500;
            background-color: rgba(201, 160, 99, 0.12);
            color: #8a6a35;
            white-space: nowrap;
        }

        .badge-tag.primary {
            background-color: rgba(31, 42, 46, 0.06);
            color: var(--color-primary);
        }

        .guide-card p {
            font-size: 15px;
            line-height: 1.75;
            color: var(--color-muted);
            margin: 0;
        }

        .guide-card-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 13px;
            color: var(--color-muted);
            border-top: 1px solid var(--color-border);
            padding-top: 12px;
        }

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

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

        .guide-card-link:hover {
            color: #b58d4e;
        }

        /* ========== Quick Steps ========== */
        .quick-steps {
            padding: var(--section-padding-desktop) 0;
            background-color: var(--color-card);
            border-top: 1px solid var(--color-border);
            border-bottom: 1px solid var(--color-border);
        }

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

        .section-heading h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--color-primary);
            letter-spacing: 0.3px;
            margin-bottom: 8px;
        }

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

        .steps-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .step-item {
            background-color: var(--color-bg);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            padding: 24px 20px;
            text-align: center;
            transition: transform var(--transition-base), box-shadow var(--transition-base);
        }

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

        .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background-color: var(--color-primary);
            color: var(--color-accent);
            font-weight: 700;
            font-size: 18px;
            margin-bottom: 14px;
        }

        .step-item h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--color-primary);
            margin-bottom: 8px;
        }

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

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

        .faq-list {
            max-width: 820px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background-color: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: 10px;
            overflow: hidden;
            transition: box-shadow var(--transition-base), border-color var(--transition-base);
        }

        .faq-item[open] {
            box-shadow: var(--shadow-md);
            border-color: rgba(31, 42, 46, 0.16);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            width: 100%;
            padding: 18px 22px;
            background: none;
            border: none;
            text-align: left;
            font-size: 16px;
            font-weight: 600;
            color: var(--color-primary);
            cursor: pointer;
            transition: background-color var(--transition-fast);
            min-height: 52px;
        }

        .faq-question:hover {
            background-color: rgba(201, 160, 99, 0.06);
        }

        .faq-icon {
            flex-shrink: 0;
            width: 32px;
            height: 32px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 6px;
            background-color: var(--color-bg);
            color: var(--color-accent);
            font-size: 18px;
            font-weight: 600;
            transition: transform var(--transition-fast);
        }

        .faq-item[open] .faq-icon {
            transform: rotate(45deg);
        }

        .faq-answer {
            padding: 0 22px 20px;
            color: var(--color-muted);
            font-size: 15px;
            line-height: 1.75;
        }

        .faq-answer p {
            margin: 0;
        }

        /* ========== Related Tools ========== */
        .related-tools {
            padding: var(--section-padding-desktop) 0;
            background-color: var(--color-card);
            border-top: 1px solid var(--color-border);
            border-bottom: 1px solid var(--color-border);
        }

        .tools-row {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-height: 48px;
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 15px;
            transition: background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
            text-decoration: none;
        }

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

        .btn-accent:hover {
            background-color: #b58d4e;
            border-color: #b58d4e;
            color: var(--color-primary);
            transform: translateY(-1px);
            box-shadow: var(--shadow-md);
        }

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

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

        /* ========== More Link Section ========== */
        .more-link-section {
            padding: 28px 0;
            background-color: var(--color-bg);
        }

        .more-link-wrapper {
            text-align: center;
        }

        .more-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 15px;
            font-weight: 600;
            color: var(--color-accent);
        }

        .more-link:hover {
            color: #b58d4e;
        }

        /* ========== Risk Note ========== */
        .risk-note {
            padding: 24px 0;
            background-color: #FDF6EC;
            border-top: 1px solid #EAD9BC;
        }

        .risk-note p {
            font-size: 14px;
            line-height: 1.7;
            color: #6B5B3A;
            margin: 0;
            text-align: center;
        }

        /* ========== Footer ========== */
        .site-footer {
            background-color: var(--color-primary);
            color: #E6E2D9;
            margin-top: auto;
            padding-top: 56px;
            padding-bottom: 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
        }

        .footer-brand h3 {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: #C9C2B7;
            margin: 0;
        }

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

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

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

        .footer-col ul a {
            color: #C9C2B7;
            font-size: 14px;
            transition: color var(--transition-fast);
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 20px 0;
            text-align: center;
        }

        .footer-bottom p {
            font-size: 13px;
            color: #9CA3A7;
            margin: 0;
        }

        /* ========== Responsive ========== */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }

            .guide-layout {
                grid-template-columns: 1fr;
            }

            .guide-sidebar {
                position: static;
                display: flex;
                flex-wrap: wrap;
                gap: 8px;
                border: none;
                background: transparent;
                padding: 0;
                box-shadow: none;
            }

            .guide-sidebar h3 {
                display: none;
            }

            .guide-sidebar ul {
                flex-direction: row;
                flex-wrap: wrap;
                gap: 8px;
            }

            .guide-sidebar ul a {
                background-color: var(--color-card);
                border: 1px solid var(--color-border);
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-height: 60px;
            }

            .main-nav,
            .nav-cta {
                display: none;
            }

            .mobile-toggle {
                display: flex;
            }

            .site-header.nav-open .main-nav {
                display: flex;
                flex-direction: column;
                align-items: stretch;
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                background-color: #ffffff;
                border-bottom: 1px solid var(--color-border);
                box-shadow: var(--shadow-lg);
                padding: 12px 16px;
                gap: 4px;
            }

            .site-header.nav-open .nav-cta {
                display: flex;
                margin-top: 8px;
                width: 100%;
            }

            .nav-link {
                width: 100%;
                min-height: 48px;
            }

            .page-header {
                padding-top: calc(var(--header-height) + 32px);
                padding-bottom: 24px;
            }

            .page-header-inner {
                flex-direction: column-reverse;
                gap: 20px;
            }

            .page-header-image {
                flex-basis: auto;
                max-width: 100%;
                width: 100%;
            }

            .page-header-image img {
                height: 180px;
            }

            .page-header-content h1 {
                font-size: 25px;
            }

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

            .guide-main,
            .quick-steps,
            .faq-section,
            .related-tools {
                padding: var(--section-padding-mobile) 0;
            }

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

            .guide-card {
                padding: 18px;
            }

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

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

            .logo {
                font-size: 17px;
            }

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

            .subtopic-bar a {
                font-size: 13px;
                padding: 6px 12px;
            }

            .btn {
                width: 100%;
            }

            .tools-row {
                flex-direction: column;
            }
        }