/* roulang page: index */
:root {
            --primary: #1668E3;
            --primary-hover: #0F56C4;
            --secondary: #F0F6FF;
            --accent: #FF7A29;
            --accent-hover: #E06618;
            --bg: #FFFFFF;
            --bg-alt: #F7F9FC;
            --text: #17233E;
            --text-sub: #5A6B85;
            --text-place: #9AA7B8;
            --border: #E7EDF4;
            --success: #22A06B;
            --radius-lg: 16px;
            --radius-md: 10px;
            --shadow-card: 0 2px 12px rgba(23, 35, 62, 0.06);
            --shadow-hover: 0 12px 24px rgba(23, 35, 62, 0.10);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            color: var(--text);
            background: var(--bg);
            line-height: 1.6;
            min-width: 320px;
            -webkit-font-smoothing: antialiased;
        }

        a {
            color: inherit;
            text-decoration: none;
        }

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

        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
        }

        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid transparent;
            transition: box-shadow .3s, border-color .3s;
        }

        .site-header.scrolled {
            box-shadow: 0 4px 20px rgba(23, 35, 62, 0.06);
            border-color: var(--border);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }

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

        .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--primary), #4A94FF);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 18px;
            font-weight: 700;
            box-shadow: 0 4px 10px rgba(22, 104, 227, 0.25);
        }

        .logo-text {
            font-size: 20px;
            font-weight: 700;
            letter-spacing: -0.01em;
            color: var(--text);
            white-space: nowrap;
        }

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

        .main-nav {
            display: flex;
            align-items: center;
            gap: 32px;
            margin-left: 48px;
        }

        .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-sub);
            padding: 8px 2px;
            position: relative;
            transition: color .2s;
            white-space: nowrap;
        }

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

        .nav-link.active {
            color: var(--primary);
            font-weight: 600;
        }

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

        .nav-cta {
            margin-left: auto;
        }

        .menu-toggle {
            display: none;
            width: 40px;
            height: 40px;
            border-radius: 10px;
            align-items: center;
            justify-content: center;
            border: 1px solid var(--border);
            color: var(--text);
        }

        .menu-toggle svg {
            width: 22px;
            height: 22px;
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 72px;
            left: 0;
            right: 0;
            z-index: 49;
            background: #fff;
            border-bottom: 1px solid var(--border);
            box-shadow: 0 12px 32px rgba(23, 35, 62, 0.08);
            padding: 16px 24px;
            flex-direction: column;
            gap: 4px;
        }

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

        .mobile-menu a {
            padding: 14px 12px;
            border-radius: 10px;
            font-size: 16px;
            font-weight: 500;
            color: var(--text);
        }

        .mobile-menu a:hover,
        .mobile-menu a.active {
            background: var(--secondary);
            color: var(--primary);
        }

        .mobile-menu a.mobile-cta {
            background: var(--primary);
            color: #fff;
            text-align: center;
            border-radius: 999px;
            margin-top: 8px;
        }

        .mobile-menu-overlay {
            display: none;
            position: fixed;
            inset: 72px 0 0 0;
            z-index: 48;
            background: rgba(23, 35, 62, 0.3);
        }

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

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 15px;
            font-weight: 500;
            padding: 12px 28px;
            border-radius: 999px;
            transition: all .3s;
            white-space: nowrap;
            line-height: 1.4;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(22, 104, 227, 0.25);
        }

        .btn-primary:hover {
            background: var(--primary-hover);
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(22, 104, 227, 0.32);
        }

        .btn-accent {
            background: var(--accent);
            color: #fff;
            box-shadow: 0 4px 14px rgba(255, 122, 41, 0.25);
        }

        .btn-accent:hover {
            background: var(--accent-hover);
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(255, 122, 41, 0.32);
        }

        .btn-secondary {
            background: transparent;
            color: var(--primary);
            border: 1.5px solid var(--primary);
        }

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

        .btn:active {
            transform: scale(0.96);
        }

        .btn:focus-visible {
            outline: none;
            box-shadow: 0 0 0 4px rgba(22, 104, 227, 0.2);
        }

        /* ===== Hero ===== */
        .hero {
            background: var(--secondary);
            position: relative;
            overflow: hidden;
            padding: 72px 0 120px;
        }

        .hero-inner {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 64px;
            align-items: center;
        }

        .hero-pill {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: #fff;
            border: 1px solid rgba(22, 104, 227, 0.2);
            border-radius: 999px;
            padding: 6px 16px;
            font-size: 13px;
            font-weight: 500;
            color: var(--primary);
            box-shadow: 0 2px 8px rgba(22, 104, 227, 0.08);
        }

        .hero-pill::before {
            content: '';
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background: var(--success);
        }

        .hero-title {
            font-size: 44px;
            line-height: 1.2;
            font-weight: 800;
            letter-spacing: -0.01em;
            margin: 22px 0 18px;
            color: var(--text);
        }

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

        .hero-subtitle {
            font-size: 17px;
            line-height: 1.7;
            color: var(--text-sub);
            max-width: 460px;
            margin-bottom: 32px;
        }

        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        .hero-figure {
            position: relative;
        }

        .hero-figure img {
            border-radius: 20px;
            box-shadow: 0 20px 40px rgba(23, 35, 62, 0.12);
            width: 100%;
            height: 380px;
            object-fit: cover;
        }

        .hero-badge {
            position: absolute;
            bottom: 20px;
            left: 20px;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(8px);
            border-radius: 14px;
            padding: 12px 18px;
            display: flex;
            align-items: center;
            gap: 10px;
            box-shadow: 0 4px 16px rgba(23, 35, 62, 0.10);
        }

        .hero-badge-icon {
            width: 34px;
            height: 34px;
            border-radius: 50%;
            background: rgba(34, 160, 107, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--success);
            font-size: 16px;
        }

        .hero-badge-text {
            font-size: 13px;
            font-weight: 600;
            color: var(--text);
        }

        .hero-badge-sub {
            font-size: 12px;
            color: var(--text-sub);
        }

        .hero-wave {
            position: absolute;
            bottom: -1px;
            left: 0;
            right: 0;
            line-height: 0;
        }

        .hero-wave svg {
            width: 100%;
            height: 80px;
        }

        /* ===== Section ===== */
        .section {
            padding: 80px 0;
        }

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

        .section-header {
            text-align: center;
            max-width: 700px;
            margin: 0 auto 56px;
        }

        .section-eyebrow {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            text-transform: none;
            margin-bottom: 10px;
        }

        .section-title {
            font-size: 32px;
            font-weight: 700;
            letter-spacing: -0.01em;
            line-height: 1.3;
            margin-bottom: 14px;
            position: relative;
            display: inline-block;
        }

        .section-title::before {
            content: '';
            display: inline-block;
            width: 4px;
            height: 28px;
            background: var(--primary);
            border-radius: 4px;
            margin-right: 12px;
            vertical-align: -4px;
        }

        .section-desc {
            font-size: 15px;
            color: var(--text-sub);
            line-height: 1.7;
        }

        /* ===== Stats ===== */
        .stats-section {
            padding: 48px 0 32px;
            border-bottom: 1px solid var(--border);
        }

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

        .stat-item {
            text-align: center;
            padding: 24px 16px;
        }

        .stat-number {
            font-size: 40px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.1;
        }

        .stat-unit {
            font-size: 18px;
            font-weight: 600;
            color: var(--primary);
            margin-left: 4px;
        }

        .stat-label {
            font-size: 14px;
            color: var(--text-sub);
            margin-top: 8px;
        }

        /* ===== Feature Cards ===== */
        .featured-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
        }

        .feature-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 16px;
            overflow: hidden;
            position: relative;
            transition: all .3s;
            box-shadow: var(--shadow-card);
            display: flex;
            flex-direction: column;
        }

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

        .feature-card-media {
            position: relative;
            overflow: hidden;
            height: 200px;
            background: var(--secondary);
        }

        .feature-card-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .4s;
        }

        .feature-card:hover .feature-card-media img {
            transform: scale(1.03);
        }

        .feature-card-badge {
            position: absolute;
            top: 14px;
            left: 14px;
            background: var(--accent);
            color: #fff;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 999px;
            box-shadow: 0 2px 8px rgba(255, 122, 41, 0.3);
        }

        .feature-card-body {
            padding: 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .feature-card-title {
            font-size: 18px;
            font-weight: 600;
            line-height: 1.4;
            margin-bottom: 8px;
        }

        .feature-card-desc {
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.6;
            margin-bottom: 16px;
            flex: 1;
        }

        .feature-card-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            border-top: 1px solid var(--border);
            padding-top: 16px;
        }

        .feature-card-price {
            font-size: 15px;
            font-weight: 700;
            color: var(--accent);
        }

        .feature-card-tag {
            font-size: 13px;
            color: var(--text-sub);
            background: var(--bg-alt);
            padding: 4px 10px;
            border-radius: 999px;
        }

        .card-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 500;
            color: var(--primary);
            background: var(--secondary);
            padding: 8px 16px;
            border-radius: 999px;
            transition: all .3s;
        }

        .card-btn:hover {
            background: var(--primary);
            color: #fff;
        }

        .card-btn:focus-visible {
            outline: none;
            box-shadow: 0 0 0 3px rgba(22, 104, 227, 0.3);
        }

        /* ===== Reviews ===== */
        .review-section {
            padding: 80px 0;
            background: var(--bg-alt);
        }

        .review-wrap {
            position: relative;
        }

        .review-track {
            display: flex;
            gap: 24px;
            overflow-x: auto;
            scroll-snap-type: x mandatory;
            padding: 8px 4px 24px;
            scrollbar-width: none;
        }

        .review-track::-webkit-scrollbar {
            display: none;
        }

        .review-card {
            flex: 0 0 320px;
            scroll-snap-align: start;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 16px;
            padding: 28px;
            box-shadow: var(--shadow-card);
            transition: all .3s;
        }

        .review-card:hover {
            box-shadow: var(--shadow-hover);
        }

        .review-stars {
            color: var(--accent);
            font-size: 16px;
            letter-spacing: 2px;
            margin-bottom: 14px;
        }

        .review-text {
            font-size: 15px;
            line-height: 1.65;
            color: var(--text);
            margin-bottom: 20px;
            min-height: 80px;
        }

        .review-user {
            display: flex;
            align-items: center;
            gap: 12px;
            border-top: 1px solid var(--border);
            padding-top: 16px;
        }

        .review-avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--secondary);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 14px;
            font-weight: 600;
        }

        .review-name {
            font-size: 14px;
            font-weight: 600;
            color: var(--text);
        }

        .review-role {
            font-size: 12px;
            color: var(--text-sub);
        }

        .review-nav {
            display: flex;
            gap: 10px;
            justify-content: flex-end;
            margin-top: 16px;
        }

        .review-btn {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: #fff;
            border: 1px solid var(--border);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-sub);
            transition: all .2s;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
        }

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

        .review-dots {
            display: flex;
            gap: 6px;
            justify-content: center;
            margin-top: 16px;
        }

        .review-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: #D0D9E4;
            transition: all .3s;
        }

        .review-dot.active {
            background: var(--primary);
            width: 24px;
            border-radius: 4px;
        }

        /* ===== Guarantees ===== */
        .guarantee-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
        }

        .guarantee-item {
            text-align: center;
            padding: 32px 20px;
            background: #fff;
            border-radius: 16px;
            border: 1px solid var(--border);
            transition: all .3s;
        }

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

        .guarantee-icon {
            width: 56px;
            height: 56px;
            border-radius: 16px;
            background: var(--secondary);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            font-size: 24px;
        }

        .guarantee-icon svg {
            width: 26px;
            height: 26px;
        }

        .guarantee-title {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 6px;
        }

        .guarantee-desc {
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.6;
        }

        /* ===== CMS List ===== */
        .cms-section {
            background: #fff;
        }

        .cms-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
            max-width: 920px;
            margin: 0 auto;
        }

        .cms-item {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 14px;
            overflow: hidden;
            transition: all .3s;
        }

        .cms-item:hover {
            box-shadow: var(--shadow-hover);
            border-color: rgba(22, 104, 227, 0.3);
        }

        .cms-link {
            display: flex;
            gap: 20px;
            padding: 16px;
            align-items: center;
        }

        .cms-thumb {
            width: 120px;
            height: 84px;
            border-radius: 10px;
            overflow: hidden;
            flex-shrink: 0;
            background: var(--secondary);
        }

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

        .cms-content {
            flex: 1;
            min-width: 0;
        }

        .cms-content h4 {
            font-size: 16px;
            font-weight: 600;
            line-height: 1.4;
            margin-bottom: 4px;
            transition: color .2s;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .cms-item:hover .cms-content h4 {
            color: var(--primary);
        }

        .cms-content p {
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.5;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

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

        .cms-category {
            display: inline-block;
            background: var(--secondary);
            color: var(--primary);
            font-size: 12px;
            font-weight: 500;
            padding: 2px 10px;
            border-radius: 999px;
        }

        .cms-empty {
            text-align: center;
            padding: 60px 20px;
            border: 2px dashed var(--border);
            border-radius: 16px;
            max-width: 920px;
            margin: 0 auto;
            background: var(--bg-alt);
        }

        .cms-empty-icon {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            border: 2px dashed var(--text-place);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            color: var(--text-place);
            font-size: 24px;
        }

        .cms-empty p {
            color: var(--text-sub);
            font-size: 15px;
        }

        /* ===== FAQ ===== */
        .faq-wrap {
            max-width: 780px;
            margin: 0 auto;
        }

        .faq-item {
            border-bottom: 1px solid var(--border);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 24px 4px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 500;
            transition: color .2s;
            gap: 16px;
        }

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

        .faq-icon {
            position: relative;
            width: 24px;
            height: 24px;
            flex-shrink: 0;
        }

        .faq-icon::before,
        .faq-icon::after {
            content: '';
            position: absolute;
            background: var(--text-sub);
            border-radius: 2px;
            transition: all .3s;
        }

        .faq-icon::before {
            width: 14px;
            height: 2px;
            top: 11px;
            left: 5px;
        }

        .faq-icon::after {
            width: 2px;
            height: 14px;
            top: 5px;
            left: 11px;
        }

        .faq-item.active .faq-icon::after {
            transform: rotate(90deg);
            opacity: 0;
        }

        .faq-item.active .faq-icon::before {
            background: var(--primary);
        }

        .faq-item.active .faq-question {
            color: var(--primary);
            font-weight: 600;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .4s ease, padding .3s ease;
            padding: 0 40px 0 4px;
            color: var(--text-sub);
            font-size: 15px;
            line-height: 1.7;
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
            padding-bottom: 24px;
        }

        /* ===== CTA ===== */
        .cta-banner {
            background: var(--primary);
            padding: 72px 0;
            position: relative;
            overflow: hidden;
        }

        .cta-banner::before,
        .cta-banner::after {
            content: '';
            position: absolute;
            border-radius: 50%;
            border: 2px solid rgba(255, 255, 255, 0.12);
        }

        .cta-banner::before {
            width: 240px;
            height: 240px;
            top: -80px;
            right: -60px;
        }

        .cta-banner::after {
            width: 160px;
            height: 160px;
            bottom: -60px;
            left: 60px;
        }

        .cta-inner {
            position: relative;
            z-index: 1;
            text-align: center;
            max-width: 640px;
            margin: 0 auto;
        }

        .cta-title {
            font-size: 36px;
            font-weight: 700;
            color: #fff;
            line-height: 1.3;
            margin-bottom: 16px;
        }

        .cta-desc {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.85);
            line-height: 1.7;
            margin-bottom: 32px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #17233E;
            color: rgba(255, 255, 255, 0.8);
            padding: 72px 0 40px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 48px;
            margin-bottom: 48px;
        }

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

        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            margin-top: 16px;
            color: rgba(255, 255, 255, 0.65);
        }

        .footer-title {
            font-size: 14px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 20px;
        }

        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-links a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.65);
            transition: color .2s;
        }

        .footer-links a:hover {
            color: #fff;
        }

        .footer-contact {
            display: flex;
            flex-direction: column;
            gap: 14px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.65);
            line-height: 1.6;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 24px;
            text-align: center;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.45);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1023px) {
            .main-nav {
                display: none;
            }

            .nav-cta {
                display: none;
            }

            .menu-toggle {
                display: flex;
            }

            .header-inner {
                height: 64px;
            }

            .hero-inner {
                grid-template-columns: 1fr;
                gap: 40px;
                text-align: center;
            }

            .hero-subtitle {
                margin-left: auto;
                margin-right: auto;
            }

            .hero-actions {
                justify-content: center;
            }

            .hero-figure img {
                height: 300px;
            }

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

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

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

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

        @media (max-width: 640px) {
            .container {
                padding: 0 16px;
            }

            .hero {
                padding: 48px 0 80px;
            }

            .hero-title {
                font-size: 32px;
            }

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

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

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

            .cms-link {
                flex-direction: column;
                align-items: flex-start;
            }

            .cms-thumb {
                width: 100%;
                height: 160px;
            }

            .section-title {
                font-size: 24px;
            }

            .cta-title {
                font-size: 26px;
            }

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

            .review-card {
                flex-basis: 280px;
            }

            .stats-grid {
                gap: 16px;
            }

            .stat-number {
                font-size: 30px;
            }
        }

        @media (min-width: 641px) and (max-width: 1023px) {
            .hero-actions .btn {
                min-width: 160px;
            }

            .featured-grid {
                gap: 24px;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #1668E3;
            --primary-hover: #0F56C4;
            --secondary: #F0F6FF;
            --accent: #FF7A29;
            --accent-hover: #E06618;
            --bg-light: #F7F9FC;
            --text-dark: #17233E;
            --text-light: #5A6B85;
            --text-placeholder: #9AA7B8;
            --border-light: #E7EDF4;
            --safe-green: #22A06B;
            --shadow-card: 0 2px 12px rgba(23, 35, 62, 0.06);
            --shadow-hover: 0 12px 24px rgba(23, 35, 62, 0.10);
            --radius-lg: 1.25rem;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            background: #fff;
            color: var(--text-dark);
            line-height: 1.6;
            min-width: 320px;
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.2s;
        }

        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 1rem;
        }

        @media (min-width: 640px) {
            .container {
                padding: 0 1.5rem;
            }
        }

        @media (min-width: 1024px) {
            .container {
                padding: 0 2rem;
            }
        }

        /* ===== 导航 ===== */
        .main-nav {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border-light);
            transition: box-shadow 0.3s;
        }

        .main-nav.scrolled {
            box-shadow: 0 4px 20px rgba(23, 35, 62, 0.08);
        }

        .main-nav .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }

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

        .logo-icon {
            width: 38px;
            height: 38px;
            background: var(--primary);
            color: #fff;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 800;
            box-shadow: 0 4px 12px rgba(22, 104, 227, 0.25);
        }

        .logo-text {
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--text-dark);
            letter-spacing: -0.01em;
            white-space: nowrap;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 2rem;
            list-style: none;
        }

        .nav-link {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-light);
            padding: 6px 2px;
            position: relative;
            letter-spacing: 0.02em;
        }

        .nav-link::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transform: scaleX(0);
            transition: transform 0.3s;
        }

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

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

        .nav-link.active {
            color: var(--primary);
            font-weight: 600;
        }

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

        .nav-cta {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            background: var(--primary);
            color: #fff;
            padding: 0.6rem 1.6rem;
            border-radius: 999px;
            font-size: 0.95rem;
            font-weight: 500;
            transition: background 0.25s, transform 0.2s;
            box-shadow: 0 4px 14px rgba(22, 104, 227, 0.2);
        }

        .nav-cta:hover {
            background: var(--primary-hover);
            transform: translateY(-2px);
        }

        .nav-cta:focus-visible {
            outline: 4px solid rgba(22, 104, 227, 0.2);
            outline-offset: 2px;
        }

        .nav-cta:active {
            transform: scale(0.96);
        }

        /* 移动端菜单 */
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            cursor: pointer;
            padding: 8px;
            border-radius: 8px;
        }

        .hamburger span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--text-dark);
            border-radius: 2px;
            transition: transform 0.3s, opacity 0.3s;
        }

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

        .hamburger.open span:nth-child(2) {
            opacity: 0;
        }

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

        .mobile-menu {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            z-index: 40;
        }

        .mobile-menu .menu-mask {
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(23, 35, 62, 0.4);
        }

        .mobile-menu .menu-panel {
            position: absolute;
            top: 0;
            right: 0;
            width: 280px;
            height: 100%;
            background: #fff;
            padding: 100px 32px 32px;
            display: flex;
            flex-direction: column;
            gap: 8px;
            box-shadow: -8px 0 30px rgba(23, 35, 62, 0.12);
            animation: slideIn 0.3s ease;
        }

        @keyframes slideIn {
            from { transform: translateX(100%); }
            to { transform: translateX(0); }
        }

        .mobile-menu .nav-link {
            font-size: 1.05rem;
            padding: 12px 0;
            border-bottom: 1px solid var(--border-light);
        }

        .mobile-menu .nav-link::after {
            display: none;
        }

        .mobile-menu .nav-cta {
            margin-top: 16px;
            text-align: center;
        }

        @media (max-width: 1023px) {
            .nav-links, .nav-cta.desktop-only {
                display: none;
            }
            .hamburger {
                display: flex;
            }
        }

        @media (min-width: 1024px) {
            .mobile-menu {
                display: none !important;
            }
        }

        /* ===== 页面 Hero ===== */
        .page-hero {
            background: var(--secondary);
            padding: 72px 0 110px;
            position: relative;
            overflow: hidden;
        }

        .page-hero .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }

        .page-hero .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: #fff;
            color: var(--primary);
            font-size: 0.9rem;
            font-weight: 600;
            padding: 8px 20px;
            border-radius: 999px;
            box-shadow: 0 4px 12px rgba(22, 104, 227, 0.12);
            margin-bottom: 24px;
        }

        .page-hero h1 {
            font-size: clamp(2.2rem, 4.5vw, 3.2rem);
            font-weight: 800;
            letter-spacing: -0.02em;
            line-height: 1.2;
            color: var(--text-dark);
            margin-bottom: 18px;
        }

        .page-hero h1 .highlight {
            color: var(--primary);
        }

        .page-hero .hero-desc {
            font-size: 1.15rem;
            color: var(--text-light);
            max-width: 560px;
            margin: 0 auto 40px;
            line-height: 1.8;
        }

        .page-hero .hero-actions {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 0.85rem 2.2rem;
            border-radius: 999px;
            font-size: 0.95rem;
            font-weight: 600;
            transition: all 0.25s;
            cursor: pointer;
            border: none;
            white-space: nowrap;
        }

        .btn:focus-visible {
            outline: 4px solid rgba(22, 104, 227, 0.2);
            outline-offset: 2px;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 6px 20px rgba(22, 104, 227, 0.25);
        }

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

        .btn-primary:active {
            transform: scale(0.96);
        }

        .btn-secondary {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
        }

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

        .btn-accent {
            background: var(--accent);
            color: #fff;
            box-shadow: 0 6px 20px rgba(255, 122, 41, 0.3);
        }

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

        .wave-divider {
            position: absolute;
            bottom: -1px;
            left: 0;
            width: 100%;
            z-index: 1;
            pointer-events: none;
        }

        .wave-divider svg {
            display: block;
            width: 100%;
            height: 60px;
        }

        @media (max-width: 640px) {
            .page-hero {
                padding: 60px 0 90px;
            }
            .page-hero .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .btn {
                width: 100%;
                justify-content: center;
            }
        }

        /* ===== 内容区块 ===== */
        .section {
            padding: 80px 0;
        }

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

        .section-white {
            background: #fff;
        }

        .section-title-wrap {
            display: flex;
            align-items: center;
            gap: 16px;
            margin-bottom: 50px;
        }

        .section-title-bar {
            width: 5px;
            height: 30px;
            background: var(--primary);
            border-radius: 4px;
            flex-shrink: 0;
        }

        .section-title {
            font-size: 2rem;
            font-weight: 800;
            color: var(--text-dark);
            letter-spacing: -0.02em;
            line-height: 1.3;
        }

        .section-subtitle {
            font-size: 1rem;
            color: var(--text-light);
            margin-top: 8px;
            max-width: 520px;
        }

        @media (max-width: 768px) {
            .section {
                padding: 56px 0;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .section-title-wrap {
                margin-bottom: 32px;
            }
        }

        /* ===== 图文介绍 ===== */
        .intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 64px;
            align-items: center;
        }

        .intro-image {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            aspect-ratio: 4 / 3;
            background: var(--secondary);
        }

        .intro-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .intro-badge {
            position: absolute;
            bottom: 20px;
            left: 20px;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(8px);
            border-radius: 999px;
            padding: 8px 18px;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--primary);
            box-shadow: 0 4px 12px rgba(23, 35, 62, 0.1);
        }

        .intro-content h3 {
            font-size: 1.6rem;
            font-weight: 700;
            margin-bottom: 20px;
            color: var(--text-dark);
            line-height: 1.4;
        }

        .intro-list {
            list-style: none;
            margin-top: 24px;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .intro-list-item {
            display: flex;
            gap: 14px;
            align-items: flex-start;
        }

        .intro-list-icon {
            width: 28px;
            height: 28px;
            border-radius: 8px;
            background: var(--secondary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.85rem;
            color: var(--primary);
            flex-shrink: 0;
            font-weight: 700;
        }

        .intro-list-text {
            font-size: 0.95rem;
            color: var(--text-light);
            line-height: 1.7;
        }

        .intro-list-text strong {
            display: block;
            color: var(--text-dark);
            margin-bottom: 2px;
            font-size: 1rem;
        }

        @media (max-width: 768px) {
            .intro-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
        }

        /* ===== 子分类卡片 ===== */
        .sub-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .sub-card {
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: transform 0.3s, box-shadow 0.3s;
            display: flex;
            flex-direction: column;
        }

        .sub-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }

        .sub-card .card-image {
            aspect-ratio: 16 / 10;
            overflow: hidden;
            background: var(--secondary);
        }

        .sub-card .card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s;
        }

        .sub-card:hover .card-image img {
            transform: scale(1.05);
        }

        .sub-card .card-body {
            padding: 24px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .sub-card .card-tag {
            align-self: flex-start;
            background: var(--accent);
            color: #fff;
            font-size: 0.75rem;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: 999px;
            margin-bottom: 14px;
        }

        .sub-card .card-title {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 10px;
            line-height: 1.4;
        }

        .sub-card .card-desc {
            font-size: 0.9rem;
            color: var(--text-light);
            line-height: 1.65;
            margin-bottom: 18px;
            flex: 1;
        }

        .sub-card .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--primary);
            font-size: 0.9rem;
            font-weight: 600;
            transition: gap 0.2s;
        }

        .sub-card .card-link:hover {
            gap: 10px;
        }

        @media (max-width: 1023px) {
            .sub-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 640px) {
            .sub-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== 使用流程 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .step-card {
            text-align: center;
            padding: 40px 24px;
            background: #fff;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-card);
            position: relative;
            transition: transform 0.3s, box-shadow 0.3s;
        }

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

        .step-number {
            width: 48px;
            height: 48px;
            background: var(--secondary);
            color: var(--primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            font-weight: 800;
            margin: 0 auto 18px;
        }

        .step-card h4 {
            font-size: 1.08rem;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 10px;
        }

        .step-card p {
            font-size: 0.9rem;
            color: var(--text-light);
            line-height: 1.7;
        }

        @media (max-width: 1023px) {
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
        }

        @media (max-width: 640px) {
            .steps-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== 相关资源 ===== */
        .resource-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }

        .resource-card {
            display: flex;
            gap: 20px;
            background: #fff;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 20px;
            box-shadow: var(--shadow-card);
            transition: transform 0.3s, box-shadow 0.3s;
        }

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

        .resource-card .thumb {
            width: 96px;
            height: 96px;
            border-radius: 14px;
            overflow: hidden;
            background: var(--secondary);
            flex-shrink: 0;
        }

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

        .resource-card .info {
            display: flex;
            flex-direction: column;
            justify-content: center;
            flex: 1;
        }

        .resource-card .info h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 6px;
            line-height: 1.45;
        }

        .resource-card .info p {
            font-size: 0.85rem;
            color: var(--text-light);
            line-height: 1.6;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .resource-card .info .meta {
            font-size: 0.78rem;
            color: var(--text-placeholder);
        }

        @media (max-width: 768px) {
            .resource-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== 保障/信任 ===== */
        .trust-bar {
            background: var(--bg-light);
            border-radius: var(--radius-lg);
            padding: 48px 40px;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
        }

        .trust-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            text-align: center;
            gap: 12px;
        }

        .trust-icon {
            width: 56px;
            height: 56px;
            border-radius: 18px;
            background: var(--secondary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
        }

        .trust-item h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-dark);
        }

        .trust-item p {
            font-size: 0.85rem;
            color: var(--text-light);
            line-height: 1.6;
            max-width: 180px;
        }

        @media (max-width: 1023px) {
            .trust-bar {
                grid-template-columns: repeat(2, 1fr);
                padding: 36px 24px;
            }
        }

        @media (max-width: 640px) {
            .trust-bar {
                grid-template-columns: 1fr;
                gap: 28px;
            }
        }

        /* ===== CTA ===== */
        .cta-banner {
            background: var(--primary);
            border-radius: var(--radius-lg);
            padding: 72px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
            color: #fff;
        }

        .cta-banner::before,
        .cta-banner::after {
            content: '';
            position: absolute;
            border-radius: 50%;
            border: 2px solid rgba(255, 255, 255, 0.15);
            pointer-events: none;
        }

        .cta-banner::before {
            width: 160px;
            height: 160px;
            top: -60px;
            left: -40px;
        }

        .cta-banner::after {
            width: 260px;
            height: 260px;
            bottom: -100px;
            right: -60px;
        }

        .cta-banner h2 {
            font-size: clamp(1.8rem, 3vw, 2.5rem);
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 16px;
            position: relative;
            z-index: 1;
        }

        .cta-banner p {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.9);
            max-width: 520px;
            margin: 0 auto 36px;
            line-height: 1.7;
            position: relative;
            z-index: 1;
        }

        .cta-banner .btn-accent {
            position: relative;
            z-index: 1;
            background: #fff;
            color: var(--primary);
            font-size: 1.05rem;
            padding: 14px 40px;
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
        }

        .cta-banner .btn-accent:hover {
            background: var(--accent);
            color: #fff;
        }

        @media (max-width: 640px) {
            .cta-banner {
                padding: 56px 24px;
            }
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--text-dark);
            color: rgba(255, 255, 255, 0.8);
            padding: 64px 0 0;
            margin-top: 80px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
            gap: 48px;
            padding-bottom: 48px;
        }

        .footer-brand .logo {
            margin-bottom: 18px;
        }

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

        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.7);
            max-width: 320px;
        }

        .footer-title {
            font-size: 1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 20px;
        }

        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .footer-links a {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.65);
            transition: color 0.2s, padding-left 0.2s;
        }

        .footer-links a:hover {
            color: #fff;
            padding-left: 4px;
        }

        .footer-contact {
            display: flex;
            flex-direction: column;
            gap: 12px;
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.65);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding: 24px 0;
            text-align: center;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.5);
        }

        @media (max-width: 1023px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 40px;
            }
        }

        @media (max-width: 640px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .site-footer {
                margin-top: 56px;
            }
        }

        /* ===== 通用动画 ===== */
        .fade-up {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.6s, transform 0.6s;
        }

        .fade-up.visible {
            opacity: 1;
            transform: translateY(0);
        }

        @media (prefers-reduced-motion: reduce) {
            .fade-up {
                opacity: 1;
                transform: none;
                transition: none;
            }
        }

        /* ===== 面包屑 ===== */
        .breadcrumb {
            background: var(--bg-light);
            border-bottom: 1px solid var(--border-light);
            padding: 14px 0;
        }

        .breadcrumb .container {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-light);
        }

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

        .breadcrumb .sep {
            color: var(--text-placeholder);
        }

/* roulang page: article */
:root {
            --primary: #1668E3;
            --primary-dark: #0F56C4;
            --secondary: #F0F6FF;
            --accent: #FF7A29;
            --accent-dark: #E06618;
            --bg-alt: #F7F9FC;
            --text-main: #17233E;
            --text-sub: #5A6B85;
            --text-placeholder: #9AA7B8;
            --border: #E7EDF4;
            --success: #22A06B;
            --radius: 16px;
            --shadow-sm: 0 2px 12px rgba(23, 35, 62, .06);
            --shadow-lg: 0 12px 24px rgba(23, 35, 62, .10);
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            background: #FFFFFF;
            color: var(--text-main);
            font-size: 16px;
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color .2s ease;
        }
        button {
            border: none;
            background: none;
            cursor: pointer;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ========== Header / Nav ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(255, 255, 255, .92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            transition: box-shadow .3s ease, border-color .3s ease;
        }
        .site-header.scrolled {
            box-shadow: 0 8px 24px rgba(23, 35, 62, .07);
            border-bottom-color: rgba(23, 35, 62, .06);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 20px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .logo-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            font-weight: 700;
            letter-spacing: .02em;
        }
        .logo-text {
            font-size: 19px;
            font-weight: 700;
            letter-spacing: -.01em;
            color: var(--text-main);
            white-space: nowrap;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-link {
            padding: 9px 18px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-sub);
            position: relative;
            transition: background .2s ease, color .2s ease;
        }
        .nav-link:hover {
            color: var(--primary);
            background: var(--secondary);
        }
        .nav-link.active {
            color: var(--primary);
            font-weight: 600;
            background: var(--secondary);
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 5px;
            width: 40px;
            height: 40px;
            border-radius: 10px;
            transition: background .2s;
            position: relative;
            z-index: 75;
        }
        .nav-toggle:hover {
            background: var(--secondary);
        }
        .nav-toggle span {
            width: 20px;
            height: 2px;
            background: var(--text-main);
            border-radius: 2px;
            transition: transform .3s ease, opacity .3s ease;
        }
        .nav-toggle.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .nav-toggle.open span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }
        .nav-overlay {
            position: fixed;
            inset: 0;
            z-index: 45;
            background: rgba(23, 35, 62, .45);
            opacity: 0;
            pointer-events: none;
            transition: opacity .3s ease;
        }
        .nav-overlay.open {
            opacity: 1;
            pointer-events: auto;
        }

        /* ========== Breadcrumb ========== */
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-sub);
            margin-bottom: 12px;
        }
        .breadcrumb-sep {
            color: var(--text-placeholder);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb .current {
            color: var(--text-main);
            font-weight: 500;
            max-width: 60vw;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        /* ========== Article Hero ========== */
        .article-hero {
            position: relative;
            overflow: hidden;
        }
        .article-hero::before {
            content: '';
            position: absolute;
            width: 340px;
            height: 340px;
            border-radius: 50%;
            background: rgba(22, 104, 227, .06);
            top: -120px;
            right: -80px;
        }
        .article-hero::after {
            content: '';
            position: absolute;
            width: 160px;
            height: 160px;
            border-radius: 50%;
            background: rgba(255, 122, 41, .08);
            bottom: -60px;
            left: -40px;
        }
        .article-hero .container {
            position: relative;
            z-index: 1;
        }
        .article-header {
            text-align: left;
        }
        .article-title {
            font-size: 2rem;
            line-height: 1.35;
            font-weight: 800;
            letter-spacing: -.01em;
            color: var(--text-main);
            margin: 16px 0 18px;
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 12px 20px;
            color: var(--text-sub);
            font-size: 14px;
            align-items: center;
        }
        .article-meta .badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 999px;
            padding: 5px 16px;
            font-size: 13px;
            color: var(--text-main);
            box-shadow: var(--shadow-sm);
        }
        .article-meta .badge i {
            font-style: normal;
            color: var(--primary);
            font-weight: 600;
        }

        /* ========== Article Body ========== */
        .article-main {
            background: #fff;
        }
        .article-content {
            font-size: 17px;
            line-height: 1.85;
            color: var(--text-main);
        }
        .article-content>*+* {
            margin-top: 1.4em;
        }
        .article-content h2 {
            font-size: 1.55rem;
            font-weight: 700;
            margin-top: 2em;
            padding-bottom: .5em;
            border-bottom: 1px solid var(--border);
            letter-spacing: -.01em;
        }
        .article-content h3 {
            font-size: 1.25rem;
            font-weight: 700;
            margin-top: 1.8em;
            letter-spacing: -.01em;
        }
        .article-content p {
            color: #37435A;
        }
        .article-content a {
            color: var(--primary);
            font-weight: 500;
            box-shadow: 0 1px 0 0 var(--primary);
        }
        .article-content a:hover {
            color: var(--primary-dark);
        }
        .article-content img {
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
        }
        .article-content blockquote {
            border-left: 4px solid var(--primary);
            background: var(--secondary);
            padding: 18px 24px;
            border-radius: 0 14px 14px 0;
            color: var(--text-sub);
            margin: 2em 0;
        }
        .article-content ul,
        .article-content ol {
            padding-left: 1.4em;
        }
        .article-content ul {
            list-style: disc;
        }
        .article-content ol {
            list-style: decimal;
        }
        .article-content li {
            margin-bottom: .6em;
            color: #37435A;
        }
        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 2em 0;
        }
        .article-content th,
        .article-content td {
            border: 1px solid var(--border);
            padding: 12px 14px;
            text-align: left;
            font-size: 15px;
        }
        .article-content th {
            background: var(--secondary);
            font-weight: 600;
        }
        .article-content figure {
            margin: 2em 0;
            text-align: center;
        }
        .article-content figcaption {
            font-size: 13px;
            color: var(--text-placeholder);
            margin-top: 10px;
        }

        /* ========== Not Found ========== */
        .article-notfound {
            max-width: 560px;
            margin: 32px auto;
            border: 2px dashed var(--border);
            border-radius: 20px;
            padding: 48px 32px;
            text-align: center;
            background: var(--bg-alt);
        }
        .article-notfound .nf-icon {
            font-size: 46px;
            margin-bottom: 12px;
        }
        .article-notfound h2 {
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .article-notfound p {
            color: var(--text-sub);
            margin-bottom: 24px;
        }

        /* ========== Related ========== */
        .section-title {
            display: flex;
            align-items: center;
            gap: 14px;
            margin-bottom: 32px;
        }
        .section-title::before {
            content: '';
            width: 4px;
            height: 24px;
            border-radius: 4px;
            background: var(--primary);
        }
        .section-title h2 {
            font-size: 1.6rem;
            font-weight: 700;
            letter-spacing: -.01em;
            color: var(--text-main);
        }
        .related-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease;
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .related-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
        }
        .related-card .card-img {
            aspect-ratio: 16 / 10;
            overflow: hidden;
            background: var(--secondary);
            display: block;
        }
        .related-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .5s ease;
        }
        .related-card:hover .card-img img {
            transform: scale(1.04);
        }
        .related-card .card-body {
            padding: 20px 22px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .related-card h3 {
            font-size: 16px;
            font-weight: 600;
            line-height: 1.5;
            margin-bottom: 8px;
            color: var(--text-main);
        }
        .related-card h3 a:hover {
            color: var(--primary);
        }
        .related-card p {
            font-size: 13px;
            color: var(--text-sub);
            line-height: 1.65;
            margin-bottom: 14px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            flex: 1;
        }
        .related-card .card-meta {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 12px;
            color: var(--text-placeholder);
            margin-top: auto;
        }

        /* ========== Buttons ========== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 999px;
            font-size: 15px;
            font-weight: 600;
            transition: all .25s ease;
            position: relative;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(22, 104, 227, .22);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(22, 104, 227, .28);
        }
        .btn-primary:active {
            transform: scale(.97);
        }
        .btn-primary:focus-visible {
            outline: 4px solid rgba(22, 104, 227, .2);
            outline-offset: 2px;
        }
        .btn-outline {
            border: 1.5px solid var(--primary);
            color: var(--primary);
            background: transparent;
        }
        .btn-outline:hover {
            background: var(--secondary);
            transform: translateY(-2px);
        }
        .btn-outline:active {
            transform: scale(.97);
        }
        .btn-outline:focus-visible {
            outline: 4px solid rgba(22, 104, 227, .2);
            outline-offset: 2px;
        }

        /* ========== Footer ========== */
        .site-footer {
            background: #17233E;
            color: #B7C0CE;
            padding: 64px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 44px;
            padding-bottom: 48px;
        }
        .footer-brand .logo-text {
            color: #fff;
        }
        .footer-brand .logo-icon {
            background: var(--primary);
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: #8E99AC;
            margin-top: 16px;
            max-width: 320px;
        }
        .footer-title {
            color: #FFFFFF;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 18px;
            letter-spacing: .02em;
        }
        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-links a {
            color: #B7C0CE;
            font-size: 14px;
            transition: color .2s ease, padding-left .2s ease;
        }
        .footer-links a:hover {
            color: #fff;
            padding-left: 4px;
        }
        .footer-contact span {
            display: block;
            font-size: 14px;
            line-height: 1.9;
            color: #B7C0CE;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .08);
            padding: 20px 0;
            font-size: 13px;
            color: #8E99AC;
            text-align: center;
        }

        /* ========== Responsive ========== */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 20px;
            }
            .site-header .container {
                height: 64px;
            }
            .logo-text {
                font-size: 16px;
            }
            .main-nav {
                position: fixed;
                top: 64px;
                right: -300px;
                width: 280px;
                height: calc(100vh - 64px);
                background: #fff;
                flex-direction: column;
                align-items: flex-start;
                justify-content: flex-start;
                gap: 6px;
                padding: 28px 20px 24px;
                z-index: 60;
                transition: right .35s ease;
                box-shadow: -12px 0 32px rgba(23, 35, 62, .14);
                border-radius: 0 0 0 20px;
                border-left: 1px solid var(--border);
            }
            .main-nav.open {
                right: 0;
            }
            .main-nav .nav-link {
                font-size: 16px;
                width: 100%;
                padding: 14px;
                border-radius: 12px;
            }
            .main-nav .nav-link::after {
                display: none;
            }
            .nav-toggle {
                display: flex;
            }
            .article-title {
                font-size: 1.55rem;
            }
            .article-meta {
                gap: 8px 12px;
            }
            .article-meta .badge {
                font-size: 12px;
                padding: 4px 12px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
        }
        @media (max-width: 520px) {
            .article-content {
                font-size: 16px;
            }
            .related-card .card-body {
                padding: 16px 18px 20px;
            }
            .logo-text {
                font-size: 15px;
            }
            .breadcrumb {
                font-size: 12px;
            }
        }