/* roulang page: index */
/* ===== 设计变量 & Reset ===== */
        :root {
            --primary: #7C3AED;
            --primary-light: #A855F7;
            --accent: #00D4AA;
            --dark: #0F172A;
            --dark-2: #1E1B4B;
            --surface: #F8FAFC;
            --white: #FFFFFF;
            --text: #334155;
            --text-light: #64748B;
            --text-muted: #94A3B8;
            --border: #E2E8F0;
            --radius-xl: 24px;
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --shadow-sm: 0 1px 3px rgba(15,23,42,0.08);
            --shadow-md: 0 4px 16px rgba(15,23,42,0.10);
            --shadow-lg: 0 16px 40px rgba(124,58,237,0.15);
            --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font);
            color: var(--text);
            background: var(--white);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color .2s ease;
        }
        img {
            max-width: 100%;
            display: block;
        }
        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
        }
        input {
            font-family: inherit;
        }

        /* ===== 容器 ===== */
        .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;
            }
        }

        /* ===== 渐变文字 ===== */
        .gradient-brand {
            background: linear-gradient(135deg, var(--primary-light) 0%, var(--accent) 100%);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .gradient-btn {
            background: linear-gradient(135deg, #7C3AED 0%, #00D4AA 100%);
            transition: all .25s ease;
        }
        .gradient-btn:hover {
            filter: brightness(1.12);
            transform: translateY(-2px);
            box-shadow: 0 12px 28px rgba(124, 58, 237, .25);
        }
        .gradient-btn:active {
            transform: scale(.96);
        }

        /* ===== 头部导航 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(255, 255, 255, .96);
            backdrop-filter: blur(8px);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 1px 4px rgba(15, 23, 42, .04);
        }
        .header-inner {
            height: 72px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.25rem;
            font-weight: 800;
            color: var(--dark);
            white-space: nowrap;
        }
        .logo__icon {
            width: 36px;
            height: 36px;
            flex-shrink: 0;
        }
        .logo__em {
            font-style: normal;
            background: linear-gradient(135deg, #7C3AED, #00D4AA);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .main-nav {
            display: flex;
            gap: 28px;
        }
        .nav-link {
            position: relative;
            font-size: .93rem;
            font-weight: 500;
            color: var(--text-light);
            padding: 8px 2px;
            border-bottom: 2px solid transparent;
            transition: color .2s ease;
        }
        .nav-link:hover {
            color: var(--primary);
        }
        .nav-link.active {
            color: var(--primary);
            font-weight: 600;
            border-bottom-color: var(--primary);
        }
        .header-right {
            display: flex;
            align-items: center;
            gap: 14px;
        }
        .search-box {
            display: flex;
            align-items: center;
            background: var(--surface);
            border-radius: 999px;
            padding: 8px 16px;
            border: 1px solid transparent;
            transition: all .2s ease;
            width: 200px;
        }
        .search-box:focus-within {
            border-color: var(--primary);
            background: #fff;
            box-shadow: 0 0 0 3px rgba(124, 58, 237, .08);
        }
        .search-box svg {
            width: 16px;
            height: 16px;
            color: var(--text-muted);
            margin-right: 8px;
            flex-shrink: 0;
            fill: none;
            stroke: currentColor;
            stroke-width: 2;
        }
        .search-box input {
            border: none;
            outline: none;
            background: transparent;
            width: 100%;
            font-size: .85rem;
            color: var(--text);
        }
        .search-box input::placeholder {
            color: var(--text-muted);
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-weight: 600;
            border-radius: 999px;
            padding: 10px 24px;
            font-size: .95rem;
            transition: all .2s ease;
            line-height: 1.4;
            min-height: 44px;
        }
        .btn-lg {
            padding: 14px 32px;
            font-size: 1rem;
        }
        .btn-sm {
            padding: 6px 18px;
            font-size: .85rem;
            min-height: 36px;
        }
        .btn-primary {
            background: linear-gradient(135deg, #7C3AED, #00D4AA);
            color: #fff;
            box-shadow: 0 4px 14px rgba(124, 58, 237, .25);
        }
        .btn-primary:hover {
            filter: brightness(1.1);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(124, 58, 237, .3);
        }
        .btn-primary:active {
            transform: scale(.96);
        }
        .btn-outline,
        .btn-outline-light {
            border: 1.5px solid var(--border);
            color: var(--text);
            background: #fff;
        }
        .btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary);
            transform: translateY(-2px);
        }
        .btn-outline-light {
            border-color: rgba(255, 255, 255, .35);
            color: #fff;
            background: transparent;
        }
        .btn-outline-light:hover {
            border-color: var(--accent);
            color: var(--accent);
            background: rgba(0, 212, 170, .08);
        }

        /* ===== Hero ===== */
        .hero-section {
            position: relative;
            background: var(--dark);
            min-height: 620px;
            display: flex;
            align-items: center;
            overflow: hidden;
            padding: 80px 0 64px;
        }
        .hero-decor {
            position: absolute;
            border-radius: 50%;
            filter: blur(80px);
            pointer-events: none;
        }
        .hero-decor-1 {
            width: 480px;
            height: 480px;
            background: rgba(124, 58, 237, .35);
            top: -120px;
            left: -80px;
        }
        .hero-decor-2 {
            width: 320px;
            height: 320px;
            background: rgba(0, 212, 170, .2);
            bottom: -80px;
            right: 10%;
        }
        .hero-grid {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1.1fr .9fr;
            gap: 60px;
            align-items: center;
        }
        .hero-content h1 {
            font-size: clamp(2rem, 4vw, 3rem);
            font-weight: 900;
            color: #fff;
            line-height: 1.2;
            letter-spacing: -0.02em;
            margin-bottom: 20px;
        }
        .hero-sub {
            font-size: 1.05rem;
            color: #CBD5E1;
            line-height: 1.8;
            margin-bottom: 32px;
            max-width: 480px;
        }
        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 36px;
        }
        .hero-meta {
            display: flex;
            gap: 24px;
            flex-wrap: wrap;
        }
        .hero-meta span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: .85rem;
            color: #94A3B8;
            background: rgba(255, 255, 255, .06);
            border: 1px solid rgba(255, 255, 255, .1);
            padding: 6px 14px;
            border-radius: 999px;
        }
        .hero-visual img {
            width: 100%;
            border-radius: var(--radius-xl);
            border: 1px solid rgba(255, 255, 255, .12);
            box-shadow: 0 24px 64px rgba(124, 58, 237, .35), 0 0 0 1px rgba(255, 255, 255, .04);
            object-fit: cover;
            aspect-ratio: 4/3;
        }
        .hero-scroll {
            position: absolute;
            bottom: 24px;
            left: 50%;
            transform: translateX(-50%);
            display: flex;
            flex-direction: column;
            align-items: center;
            color: #64748B;
            font-size: .75rem;
            gap: 4px;
            animation: floatDown 2s ease-in-out infinite;
        }
        @keyframes floatDown {
            0%,
            100% {
                transform: translate(-50%, 0);
            }
            50% {
                transform: translate(-50%, 8px);
            }
        }

        /* ===== 通用板块 ===== */
        .section {
            padding: 80px 0;
        }
        .section-sm {
            padding: 56px 0;
        }
        .section-title {
            font-size: clamp(1.6rem, 3vw, 2.2rem);
            font-weight: 800;
            color: var(--dark);
            line-height: 1.3;
            margin-bottom: 12px;
            letter-spacing: -0.01em;
        }
        .section-subtitle {
            font-size: 1rem;
            color: var(--text-light);
            line-height: 1.7;
            max-width: 560px;
        }
        .section-header {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 24px;
            margin-bottom: 40px;
            flex-wrap: wrap;
        }
        .section-header .more-link {
            font-size: .9rem;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            white-space: nowrap;
        }
        .section-header .more-link:hover {
            gap: 8px;
        }

        /* ===== 故事/理念 ===== */
        .story-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }
        .story-copy h3 {
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 16px;
            line-height: 1.4;
        }
        .story-copy p {
            color: var(--text-light);
            line-height: 1.8;
            margin-bottom: 16px;
        }
        .story-stats {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }
        .stat-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            text-align: center;
            transition: all .3s ease;
        }
        .stat-card:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .stat-card .num {
            font-size: 2.2rem;
            font-weight: 900;
            background: linear-gradient(135deg, #7C3AED, #00D4AA);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            line-height: 1.2;
        }
        .stat-card .label {
            font-size: .9rem;
            color: var(--text-light);
            margin-top: 4px;
        }

        /* ===== 精选卡片 ===== */
        .featured-section {
            background: var(--surface);
        }
        .featured-list {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }
        .featured-card {
            display: flex;
            align-items: center;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all .3s ease;
        }
        .featured-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
            border-color: rgba(124, 58, 237, .3);
        }
        .featured-card__thumb {
            position: relative;
            width: 280px;
            min-width: 280px;
            aspect-ratio: 16/10;
            overflow: hidden;
        }
        .featured-card__thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .4s ease;
        }
        .featured-card:hover .featured-card__thumb img {
            transform: scale(1.05);
        }
        .featured-card__index {
            position: absolute;
            top: 12px;
            left: 12px;
            background: rgba(15, 23, 42, .75);
            color: #fff;
            font-size: .7rem;
            font-weight: 700;
            border-radius: 999px;
            padding: 4px 12px;
            backdrop-filter: blur(4px);
        }
        .featured-card__body {
            padding: 24px 28px;
            flex: 1;
        }
        .featured-card__body .card-tag {
            display: inline-block;
            background: rgba(124, 58, 237, .1);
            color: var(--primary);
            font-size: .75rem;
            font-weight: 600;
            border-radius: 999px;
            padding: 4px 12px;
            margin-bottom: 10px;
        }
        .featured-card__body h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .featured-card__body p {
            font-size: .9rem;
            color: var(--text-light);
            line-height: 1.6;
            margin-bottom: 12px;
        }
        .featured-card__body .card-link {
            font-size: .88rem;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .featured-card__body .card-link:hover {
            gap: 8px;
        }

        /* ===== 最新信息列表 ===== */
        .latest-list {
            display: flex;
            flex-direction: column;
            gap: 0;
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            background: #fff;
        }
        .latest-item {
            display: flex;
            align-items: center;
            gap: 20px;
            padding: 20px 24px;
            border-bottom: 1px solid var(--border);
            transition: background .2s ease;
        }
        .latest-item:last-child {
            border-bottom: none;
        }
        .latest-item:hover {
            background: var(--surface);
        }
        .latest-item .item-tag {
            flex-shrink: 0;
            background: rgba(124, 58, 237, .08);
            color: var(--primary);
            font-size: .75rem;
            font-weight: 600;
            border-radius: 999px;
            padding: 4px 14px;
            white-space: nowrap;
        }
        .latest-item .item-body {
            flex: 1;
            min-width: 0;
        }
        .latest-item .item-body h3 {
            font-size: .98rem;
            font-weight: 600;
            color: var(--dark);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            margin-bottom: 2px;
        }
        .latest-item .item-body h3:hover {
            color: var(--primary);
        }
        .latest-item .item-body p {
            font-size: .84rem;
            color: var(--text-light);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .latest-item .item-time {
            flex-shrink: 0;
            font-size: .82rem;
            color: var(--text-muted);
            white-space: nowrap;
        }
        .latest-item .item-read {
            flex-shrink: 0;
            font-size: .85rem;
            font-weight: 600;
            color: var(--primary);
            white-space: nowrap;
            opacity: 0;
            transform: translateX(-6px);
            transition: all .25s ease;
        }
        .latest-item:hover .item-read {
            opacity: 1;
            transform: translateX(0);
        }
        .empty-state {
            padding: 60px 24px;
            text-align: center;
            color: var(--text-muted);
            font-size: .95rem;
        }

        /* ===== 信任背书 ===== */
        .trust-section {
            background: var(--surface);
        }
        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .testimonial-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 28px;
            transition: all .3s ease;
        }
        .testimonial-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .testimonial-card .quote {
            font-size: 1rem;
            line-height: 1.7;
            color: var(--text);
            margin-bottom: 20px;
        }
        .testimonial-card .author {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .testimonial-card .avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: linear-gradient(135deg, #7C3AED, #00D4AA);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: .85rem;
            font-weight: 700;
        }
        .testimonial-card .author-info {
            font-size: .82rem;
            color: var(--text-muted);
            line-height: 1.4;
        }
        .testimonial-card .author-info strong {
            display: block;
            color: var(--dark);
            font-size: .92rem;
        }

        /* ===== 数据条 ===== */
        .trust-stats {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 48px;
            padding: 32px 0;
            border-top: 1px solid var(--border);
        }
        .trust-stat-item {
            text-align: center;
        }
        .trust-stat-item .num {
            font-size: 2rem;
            font-weight: 900;
            color: var(--dark);
            line-height: 1.2;
        }
        .trust-stat-item .num span {
            color: var(--primary);
        }
        .trust-stat-item .label {
            font-size: .85rem;
            color: var(--text-light);
            margin-top: 4px;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            margin-bottom: 16px;
            overflow: hidden;
            transition: all .25s ease;
            background: #fff;
        }
        .faq-item.active {
            border-color: var(--primary);
            box-shadow: 0 4px 16px rgba(124, 58, 237, .08);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 24px;
            font-size: .98rem;
            font-weight: 600;
            color: var(--dark);
            cursor: pointer;
            gap: 16px;
            min-height: 56px;
        }
        .faq-question .faq-icon {
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: rgba(124, 58, 237, .1);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1rem;
            flex-shrink: 0;
            transition: all .3s ease;
            color: var(--primary);
        }
        .faq-item.active .faq-icon {
            transform: rotate(45deg);
            background: var(--primary);
            color: #fff;
        }
        .faq-answer {
            padding: 0 24px 20px;
            font-size: .92rem;
            color: var(--text-light);
            line-height: 1.8;
            display: none;
        }
        .faq-item.active .faq-answer {
            display: block;
        }

        /* ===== CTA/订阅 ===== */
        .cta-section {
            position: relative;
            background: linear-gradient(135deg, #0F172A 0%, #1E1B4B 100%);
            padding: 88px 0;
            overflow: hidden;
        }
        .cta-section::after {
            content: '';
            position: absolute;
            top: -80px;
            right: -80px;
            width: 300px;
            height: 300px;
            background: rgba(0, 212, 170, .18);
            border-radius: 50%;
            filter: blur(60px);
        }
        .cta-inner {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 640px;
            margin: 0 auto;
        }
        .cta-inner h2 {
            font-size: clamp(1.85rem, 3.5vw, 2.5rem);
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
            line-height: 1.3;
        }
        .cta-inner p {
            color: #C7D2FE;
            font-size: 1rem;
            line-height: 1.7;
            margin-bottom: 36px;
        }
        .subscribe-form {
            display: flex;
            gap: 12px;
            max-width: 440px;
            margin: 0 auto 28px;
            flex-wrap: wrap;
            justify-content: center;
        }
        .subscribe-form input {
            flex: 1;
            min-width: 240px;
            background: rgba(255, 255, 255, .1);
            border: 1px solid rgba(255, 255, 255, .18);
            border-radius: 999px;
            padding: 14px 24px;
            color: #fff;
            font-size: .92rem;
            outline: none;
            transition: all .25s ease;
        }
        .subscribe-form input:focus {
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(0, 212, 170, .15);
        }
        .subscribe-form input::placeholder {
            color: #94A3B8;
        }
        .cta-tags {
            display: flex;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
        }
        .cta-tags span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: .78rem;
            color: #94A3B8;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: #fff;
            border-top: 1px solid var(--border);
            padding-top: 64px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 48px;
        }
        .footer-brand .logo {
            margin-bottom: 12px;
        }
        .footer-brand p {
            font-size: .88rem;
            color: var(--text-light);
            line-height: 1.7;
            max-width: 280px;
        }
        .footer-col h4 {
            font-size: .95rem;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 16px;
        }
        .footer-col ul {
            list-style: none;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul a {
            font-size: .88rem;
            color: var(--text-light);
            transition: color .2s ease;
        }
        .footer-col ul a:hover {
            color: var(--primary);
        }
        .footer-bottom {
            border-top: 1px solid var(--border);
            padding: 20px 0;
            text-align: center;
            font-size: .82rem;
            color: var(--text-muted);
        }

        /* ===== 移动端导航 ===== */
        .menu-toggle {
            display: none;
            width: 44px;
            height: 44px;
            align-items: center;
            justify-content: center;
            border-radius: 10px;
            background: var(--surface);
            color: var(--dark);
        }
        .mobile-nav {
            display: none;
            background: #fff;
            border-top: 1px solid var(--border);
            padding: 16px 20px;
        }
        .mobile-nav a {
            display: block;
            padding: 12px 0;
            font-weight: 600;
            color: var(--text);
            border-bottom: 1px solid var(--border);
        }
        .mobile-nav a:last-child {
            border-bottom: none;
        }
        .mobile-nav a.active {
            color: var(--primary);
        }

        /* ===== 响应式 ===== */
        @media(max-width:1024px) {
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .hero-section {
                padding: 60px 0 80px;
            }
            .hero-visual {
                max-width: 640px;
                margin: 0 auto;
            }
            .story-grid {
                grid-template-columns: 1fr;
                gap: 36px;
            }
            .testimonial-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .featured-card {
                flex-direction: column;
                align-items: stretch;
            }
            .featured-card__thumb {
                width: 100%;
                min-width: 100%;
            }
        }
        @media(max-width:768px) {
            .main-nav {
                display: none;
            }
            .header-right .search-box {
                display: none;
            }
            .menu-toggle {
                display: flex;
            }
            .mobile-nav.open {
                display: block;
            }
            .section {
                padding: 56px 0;
            }
            .hero-section {
                min-height: auto;
                padding: 40px 0 64px;
            }
            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .hero-actions .btn {
                width: 100%;
            }
            .story-stats {
                grid-template-columns: 1fr 1fr;
            }
            .testimonial-grid {
                grid-template-columns: 1fr;
            }
            .trust-stats {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .latest-item {
                padding: 16px;
                gap: 12px;
                flex-wrap: wrap;
            }
            .latest-item .item-body p {
                display: none;
            }
            .latest-item .item-time {
                font-size: .78rem;
            }
            .latest-item .item-read {
                display: none;
            }
        }
        @media(max-width:520px) {
            .logo {
                font-size: 1.05rem;
            }
            .header-right .btn-primary {
                display: none;
            }
            .hero-content h1 {
                font-size: 1.65rem;
            }
            .hero-sub {
                font-size: .92rem;
            }
            .section-title {
                font-size: 1.4rem;
            }
            .stat-card {
                padding: 20px 16px;
            }
            .stat-card .num {
                font-size: 1.6rem;
            }
            .featured-card__body {
                padding: 18px 20px;
            }
            .container {
                padding: 0 .75rem;
            }
        }

        /* ===== 可访问性 ===== */
        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 3px solid rgba(124, 58, 237, .4);
            outline-offset: 2px;
        }

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --primary: #7C3AED;
            --primary-hover: #6D28D9;
            --primary-light: #A855F7;
            --accent: #00D4AA;
            --dark: #0F172A;
            --dark-2: #1e1b4b;
            --text-main: #334155;
            --text-secondary: #64748B;
            --text-invert: #E2E8F0;
            --border: #E2E8F0;
            --bg-gray: #F8FAFC;
            --radius-sm: 0.5rem;
            --radius-md: 0.75rem;
            --radius-lg: 1.25rem;
            --radius-full: 9999px;
            --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.08);
            --shadow-md: 0 6px 20px rgba(15, 23, 42, 0.10);
            --shadow-brand: 0 0 40px rgba(124, 58, 237, 0.15);
        }

        /* ===== Reset / Base ===== */
        *,
        *::before,
        *::after {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            background: #fff;
            color: var(--text-main);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.2s;
        }
        button,
        input {
            font-family: inherit;
            font-size: 100%;
            border: none;
            outline: none;
        }
        ul {
            list-style: none;
        }

        /* ===== 容器 ===== */
        .container {
            max-width: 80rem;
            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 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: #fff;
            border-bottom: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 1rem;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 0.625rem;
            font-weight: 800;
            font-size: 1.125rem;
            color: #0F172A;
            white-space: nowrap;
            flex-shrink: 0;
        }
        .logo__icon {
            width: 40px;
            height: 40px;
            flex-shrink: 0;
        }
        .logo__em {
            font-style: normal;
            background: linear-gradient(135deg, #7C3AED, #00D4AA);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 0.125rem;
            margin: 0 auto;
        }
        .nav-link {
            padding: 0.5rem 0.875rem;
            font-size: 0.9375rem;
            font-weight: 500;
            color: #475569;
            border-radius: var(--radius-sm);
            position: relative;
            transition: all 0.2s;
            white-space: nowrap;
        }
        .nav-link:hover {
            color: var(--primary);
            background: rgba(124, 58, 237, 0.05);
        }
        .nav-link.active {
            color: var(--primary);
            font-weight: 600;
        }
        .nav-link.active::after {
            content: "";
            position: absolute;
            left: 0.875rem;
            right: 0.875rem;
            bottom: -0.125rem;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            flex-shrink: 0;
        }
        .search-box {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            background: #F1F5F9;
            border-radius: var(--radius-full);
            padding: 0 1rem;
            height: 40px;
            width: 180px;
            transition: box-shadow 0.2s;
        }
        .search-box:focus-within {
            box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.15);
        }
        .search-box input {
            background: transparent;
            font-size: 0.875rem;
            width: 100%;
            color: var(--text-main);
        }
        .search-box input::placeholder {
            color: #94A3B8;
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            padding: 0.5rem;
            cursor: pointer;
            border-radius: var(--radius-sm);
        }
        .nav-toggle span {
            width: 20px;
            height: 2px;
            background: #0F172A;
            border-radius: 2px;
            transition: all 0.25s;
        }
        .nav-toggle:hover span {
            background: var(--primary);
        }

        /* ===== 按钮 ===== */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            background: linear-gradient(135deg, #7C3AED, #A855F7);
            color: #fff;
            font-weight: 600;
            font-size: 0.9375rem;
            padding: 0.625rem 1.375rem;
            border-radius: var(--radius-full);
            transition: all 0.25s;
            box-shadow: 0 2px 10px rgba(124, 58, 237, 0.28);
            white-space: nowrap;
            border: none;
            cursor: pointer;
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(124, 58, 237, 0.35);
            filter: brightness(1.08);
        }
        .btn-primary:active {
            transform: scale(0.96);
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            background: transparent;
            color: var(--primary);
            font-weight: 600;
            font-size: 0.9375rem;
            padding: 0.625rem 1.375rem;
            border-radius: var(--radius-md);
            border: 1.5px solid rgba(124, 58, 237, 0.4);
            transition: all 0.25s;
            white-space: nowrap;
            cursor: pointer;
        }
        .btn-secondary:hover {
            border-color: var(--primary);
            background: rgba(124, 58, 237, 0.06);
            transform: translateY(-2px);
        }
        .btn-secondary:active {
            transform: scale(0.96);
        }

        /* ===== 面包屑 ===== */
        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 0.375rem;
            font-size: 0.8125rem;
            color: var(--text-secondary);
            margin-bottom: 1rem;
        }
        .breadcrumb a {
            color: var(--text-secondary);
            transition: color 0.2s;
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb .sep {
            color: #CBD5E1;
        }
        .breadcrumb .current {
            color: #0F172A;
            font-weight: 500;
        }

        /* ===== 文章顶部区 ===== */
        .page-hero {
            background: var(--bg-gray);
            border-bottom: 1px solid var(--border);
            padding: 2.5rem 0 2rem;
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 1rem;
            margin-top: 1.25rem;
            font-size: 0.875rem;
            color: var(--text-secondary);
        }
        .meta-item {
            display: inline-flex;
            align-items: center;
            gap: 0.375rem;
        }
        .category-badge {
            display: inline-flex;
            align-items: center;
            background: rgba(124, 58, 237, 0.1);
            color: var(--primary);
            font-size: 0.8125rem;
            font-weight: 600;
            padding: 0.25rem 0.875rem;
            border-radius: var(--radius-full);
        }

        /* ===== 正文排版 ===== */
        .article-body {
            max-width: 48rem;
            margin: 0 auto;
            font-size: 1rem;
            line-height: 1.9;
            color: var(--text-main);
        }
        .article-body p {
            margin-bottom: 1.5rem;
        }
        .article-body h2 {
            font-size: 1.5rem;
            font-weight: 700;
            margin: 2.5rem 0 1rem;
            color: #0F172A;
            padding-left: 0.875rem;
            border-left: 4px solid var(--primary);
            line-height: 1.4;
        }
        .article-body h3 {
            font-size: 1.25rem;
            font-weight: 600;
            margin: 2rem 0 0.75rem;
            color: #0F172A;
        }
        .article-body h4 {
            font-size: 1.0625rem;
            font-weight: 600;
            margin: 1.5rem 0 0.5rem;
            color: #0F172A;
        }
        .article-body img {
            border-radius: var(--radius-md);
            margin: 2rem 0;
            max-width: 100%;
            height: auto;
        }
        .article-body a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 3px;
        }
        .article-body blockquote {
            margin: 2rem 0;
            padding: 1rem 1.5rem;
            background: rgba(124, 58, 237, 0.06);
            border-left: 4px solid var(--primary);
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            color: #475569;
            font-style: italic;
        }
        .article-body ul,
        .article-body ol {
            margin: 0 0 1.5rem 1.25rem;
            padding-left: 0.5rem;
        }
        .article-body ul {
            list-style: disc;
        }
        .article-body ol {
            list-style: decimal;
        }
        .article-body li {
            margin-bottom: 0.5rem;
        }
        .article-body code {
            background: #F1F5F9;
            padding: 0.15rem 0.5rem;
            border-radius: 0.25rem;
            font-size: 0.875em;
            color: var(--primary);
        }
        .article-body pre {
            background: #0F172A;
            color: #E2E8F0;
            padding: 1.25rem;
            border-radius: var(--radius-md);
            overflow-x: auto;
            margin: 2rem 0;
            font-size: 0.875rem;
            line-height: 1.7;
        }
        .article-body pre code {
            background: none;
            color: inherit;
            padding: 0;
        }

        /* ===== 相关推荐 ===== */
        .related-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 1rem;
        }
        @media (max-width: 640px) {
            .related-grid {
                grid-template-columns: 1fr;
            }
        }
        .related-card {
            display: flex;
            gap: 0.875rem;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 0.625rem;
            transition: all 0.25s;
            align-items: center;
        }
        .related-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
            border-color: rgba(124, 58, 237, 0.35);
        }
        .related-card img {
            width: 100px;
            height: 66px;
            object-fit: cover;
            border-radius: 0.5rem;
            flex-shrink: 0;
        }
        .related-card h3 {
            font-size: 0.9375rem;
            font-weight: 600;
            color: var(--text-main);
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card time {
            font-size: 0.8125rem;
            color: var(--text-secondary);
            margin-top: 0.25rem;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 48rem;
            margin: 0 auto;
        }
        .faq-item {
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            margin-bottom: 0.75rem;
            overflow: hidden;
            transition: border-color 0.2s;
            background: #fff;
        }
        .faq-item:hover {
            border-color: rgba(124, 58, 237, 0.35);
        }
        .faq-item input[type="checkbox"] {
            display: none;
        }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 1rem;
            padding: 1rem 1.25rem;
            font-weight: 600;
            font-size: 0.9375rem;
            color: #0F172A;
            cursor: pointer;
            user-select: none;
            transition: background 0.2s;
        }
        .faq-question:hover {
            background: rgba(124, 58, 237, 0.03);
        }
        .faq-question::after {
            content: "+";
            font-size: 1.375rem;
            font-weight: 400;
            color: var(--primary);
            transition: transform 0.25s;
            flex-shrink: 0;
            line-height: 1;
        }
        .faq-item input:checked + .faq-question::after {
            transform: rotate(45deg);
        }
        .faq-item input:checked + .faq-question {
            border-bottom: 1px solid var(--border);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
        }
        .faq-item input:checked + .faq-question + .faq-answer {
            max-height: 400px;
            padding: 0.875rem 1.25rem 1.125rem;
        }
        .faq-answer p {
            font-size: 0.9375rem;
            color: var(--text-secondary);
            line-height: 1.75;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, #0F172A 0%, #1e1b4b 60%, #312E81 100%);
            position: relative;
            overflow: hidden;
            padding: 4.5rem 0;
        }
        .cta-section::before {
            content: "";
            position: absolute;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: rgba(124, 58, 237, 0.35);
            filter: blur(100px);
            top: -100px;
            right: -80px;
            pointer-events: none;
        }
        .cta-section::after {
            content: "";
            position: absolute;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: rgba(0, 212, 170, 0.2);
            filter: blur(90px);
            bottom: -120px;
            left: -80px;
            pointer-events: none;
        }
        .cta-form {
            display: flex;
            gap: 0.75rem;
            max-width: 480px;
            margin: 2rem auto 0;
        }
        .cta-form input {
            flex: 1;
            height: 48px;
            border-radius: var(--radius-full);
            border: 1px solid rgba(255, 255, 255, 0.2);
            background: rgba(255, 255, 255, 0.1);
            padding: 0 1.375rem;
            font-size: 0.9375rem;
            color: #fff;
            transition: all 0.25s;
            min-width: 0;
        }
        .cta-form input::placeholder {
            color: rgba(255, 255, 255, 0.6);
        }
        .cta-form input:focus {
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(0, 212, 170, 0.2);
        }
        .cta-trust {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 1rem;
            margin-top: 1.25rem;
            font-size: 0.8125rem;
            color: rgba(255, 255, 255, 0.5);
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: #fff;
            border-top: 1px solid var(--border);
            padding: 3rem 0 1.5rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 2rem;
            margin-bottom: 2rem;
        }
        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 1.5rem;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }
        .footer-brand p {
            font-size: 0.875rem;
            color: var(--text-secondary);
            line-height: 1.75;
            margin-top: 0.75rem;
        }
        .footer-col h4 {
            font-size: 0.9375rem;
            font-weight: 700;
            color: #0F172A;
            margin-bottom: 0.875rem;
        }
        .footer-col ul li {
            margin-bottom: 0.5rem;
        }
        .footer-col ul a {
            font-size: 0.875rem;
            color: var(--text-secondary);
            transition: color 0.2s;
        }
        .footer-col ul a:hover {
            color: var(--primary);
        }
        .footer-col .contact-item {
            font-size: 0.875rem;
            color: var(--text-secondary);
            margin-bottom: 0.5rem;
            display: flex;
            align-items: center;
            gap: 0.375rem;
        }
        .footer-bottom {
            border-top: 1px solid var(--border);
            padding-top: 1.25rem;
            text-align: center;
            font-size: 0.8125rem;
            color: #94A3B8;
        }

        /* ===== 空态 ===== */
        .empty-state {
            text-align: center;
            padding: 4rem 1rem;
        }
        .empty-state .empty-icon {
            width: 72px;
            height: 72px;
            margin: 0 auto 1rem;
            border-radius: 50%;
            background: rgba(124, 58, 237, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 768px) {
            .search-box {
                display: none;
            }
            .btn-primary {
                padding: 0.5rem 1rem;
                font-size: 0.875rem;
            }
            .header-inner {
                height: 64px;
            }
            .nav-toggle {
                display: flex;
            }
            .main-nav {
                position: fixed;
                top: 64px;
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                padding: 1rem;
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow-md);
                transform: translateY(-120%);
                transition: transform 0.3s ease;
                margin: 0;
                z-index: 40;
                align-items: stretch;
            }
            .main-nav.open {
                transform: translateY(0);
            }
            .nav-link {
                width: 100%;
                padding: 0.875rem 1rem;
                border-radius: var(--radius-md);
            }
            .nav-link.active::after {
                display: none;
            }
            .nav-link.active {
                background: rgba(124, 58, 237, 0.08);
            }
            .page-hero {
                padding: 1.75rem 0 1.5rem;
            }
            .breadcrumb {
                font-size: 0.75rem;
            }
            .article-body {
                font-size: 0.9375rem;
            }
            .article-body h2 {
                font-size: 1.25rem;
            }
            .cta-section {
                padding: 3rem 0;
            }
            .cta-form {
                flex-direction: column;
                gap: 0.75rem;
            }
            .cta-form .btn-primary {
                width: 100%;
                height: 48px;
            }
        }

        @media (max-width: 520px) {
            .logo {
                font-size: 1rem;
            }
            .logo__icon {
                width: 34px;
                height: 34px;
            }
            .header-inner {
                gap: 0.5rem;
            }
            .btn-primary {
                padding: 0.5rem 0.875rem;
                font-size: 0.8125rem;
            }
            .article-meta {
                gap: 0.625rem;
                font-size: 0.8125rem;
            }
            .related-card img {
                width: 80px;
                height: 56px;
            }
            .faq-question {
                font-size: 0.875rem;
                padding: 0.875rem 1rem;
            }
        }

        @media (min-width: 769px) and (max-width: 1024px) {
            .search-box {
                width: 120px;
            }
            .nav-link {
                padding: 0.5rem 0.625rem;
                font-size: 0.875rem;
            }
        }

        /* 焦点可见性 */
        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 3px;
        }

/* roulang page: category1 */
:root {
            --primary: #7C3AED;
            --primary-light: #A855F7;
            --accent: #00D4AA;
            --ink: #0F172A;
            --ink-soft: #1E293B;
            --white: #FFFFFF;
            --mist: #F8FAFC;
            --text-body: #334155;
            --text-muted: #64748B;
            --text-light: #E2E8F0;
            --border: #E2E8F0;
            --radius-lg: 1.25rem;
            --radius-xl: 1.5rem;
            --shadow-sm: 0 1px 3px rgba(15, 23, 42, .08);
            --shadow-md: 0 8px 24px rgba(15, 23, 42, .08);
            --shadow-glow: 0 0 40px rgba(124, 58, 237, .18);
            --font-sans: -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: var(--font-sans);
            background: var(--white);
            color: var(--text-body);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }

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

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

        button {
            font-family: inherit;
            cursor: pointer;
        }

        input {
            font-family: inherit;
        }

        .container {
            max-width: 80rem;
            margin: 0 auto;
            padding: 0 1.25rem;
        }

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

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

        .container-narrow {
            max-width: 50rem;
        }

        .section {
            padding: 5rem 0;
            scroll-margin-top: 90px;
        }

        .section-white {
            background: #fff;
        }

        .section-mist {
            background: var(--mist);
        }

        .section-head {
            text-align: center;
            max-width: 46rem;
            margin: 0 auto 3rem;
        }

        .section-title {
            margin: .75rem 0 .5rem;
            font-size: clamp(1.75rem, 3vw, 2.5rem);
            font-weight: 800;
            color: var(--ink);
            letter-spacing: -0.02em;
            line-height: 1.2;
        }

        .section-sub {
            color: var(--text-muted);
            font-size: 1rem;
        }

        .section-text {
            color: var(--text-muted);
            margin-bottom: 1.25rem;
        }

        .badge {
            display: inline-flex;
            align-items: center;
            gap: .35rem;
            border-radius: 999px;
            padding: .35rem .9rem;
            font-size: .8rem;
            font-weight: 700;
            line-height: 1.4;
        }

        .badge-primary {
            background: rgba(124, 58, 237, .12);
            color: var(--primary);
        }

        .badge-ghost {
            background: rgba(255, 255, 255, .1);
            color: #E2E8F0;
            border: 1px solid rgba(255, 255, 255, .18);
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: #fff;
            border-bottom: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            height: 72px;
        }

        .logo {
            display: inline-flex;
            align-items: center;
            gap: .5rem;
            font-size: 1.125rem;
            font-weight: 800;
            color: var(--ink);
            white-space: nowrap;
        }

        .logo__icon {
            width: 36px;
            height: 36px;
            flex: none;
        }

        .logo__em {
            font-style: normal;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 2rem;
        }

        .nav-link {
            position: relative;
            font-size: .95rem;
            font-weight: 600;
            color: var(--text-muted);
            padding: .5rem 0;
            transition: color .2s;
        }

        .nav-link::after {
            content: "";
            position: absolute;
            left: 0;
            right: 100%;
            bottom: 0;
            height: 2px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            transition: right .25s;
        }

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

        .nav-link:hover::after {
            right: 0;
        }

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

        .nav-link.active::after {
            right: 0;
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: .75rem;
        }

        .nav-search {
            display: flex;
            align-items: center;
            gap: .5rem;
            background: var(--mist);
            border-radius: 999px;
            padding: .45rem .9rem;
            width: 220px;
            border: 1px solid transparent;
            transition: border-color .2s, box-shadow .2s;
        }

        .nav-search:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(124, 58, 237, .12);
        }

        .nav-search svg {
            width: 16px;
            height: 16px;
            color: var(--text-muted);
            flex: none;
        }

        .nav-search input {
            border: none;
            background: transparent;
            outline: none;
            width: 100%;
            font-size: .875rem;
            color: var(--ink);
        }

        .nav-search input::placeholder {
            color: #94A3B8;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: .4rem;
            font-weight: 700;
            border-radius: 999px;
            transition: all .2s ease;
            border: 1.5px solid transparent;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            padding: .65rem 1.35rem;
            font-size: .95rem;
        }

        .btn-primary:hover {
            filter: brightness(1.08);
            transform: translateY(-2px);
            box-shadow: var(--shadow-glow);
        }

        .btn-primary:active {
            transform: scale(.97);
        }

        .btn-sm {
            padding: .5rem 1rem;
            font-size: .875rem;
        }

        .btn-secondary {
            background: #fff;
            color: var(--primary);
            border-color: var(--primary);
            padding: .65rem 1.35rem;
            font-size: .95rem;
        }

        .btn-secondary:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }

        .btn-outline-light {
            background: transparent;
            color: #fff;
            border-color: rgba(255, 255, 255, .35);
            padding: .65rem 1.4rem;
            font-size: .95rem;
        }

        .btn-outline-light:hover {
            border-color: #fff;
            background: rgba(255, 255, 255, .08);
        }

        .nav-toggle {
            display: none;
            background: var(--mist);
            border: 1px solid var(--border);
            border-radius: .75rem;
            width: 44px;
            height: 44px;
            align-items: center;
            justify-content: center;
        }

        .nav-toggle svg {
            width: 22px;
            height: 22px;
            color: var(--ink);
        }

        .mobile-menu {
            display: none;
            border-top: 1px solid var(--border);
            background: #fff;
            padding: 1rem 1.25rem;
        }

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

        .mobile-menu .nav-link {
            display: block;
            padding: .7rem 0;
            border-bottom: 1px solid #f1f5f9;
        }

        .mobile-search {
            display: flex;
            align-items: center;
            gap: .5rem;
            background: var(--mist);
            border-radius: 999px;
            padding: .5rem .9rem;
            margin-bottom: .6rem;
            border: 1px solid transparent;
        }

        .mobile-search svg {
            width: 16px;
            height: 16px;
            color: var(--text-muted);
            flex: none;
        }

        .mobile-search input {
            border: none;
            background: transparent;
            outline: none;
            width: 100%;
            font-size: .875rem;
            color: var(--ink);
        }

        .hero-slim {
            position: relative;
            background: var(--ink);
            padding: 5rem 0;
            overflow: hidden;
        }

        .hero-slim::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(124, 58, 237, .28), rgba(0, 212, 170, .14)), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
        }

        .hero-slim::after {
            content: "";
            position: absolute;
            inset: 0;
            background: radial-gradient(600px circle at 80% 20%, rgba(168, 85, 247, .25), transparent 70%);
        }

        .hero-slim__inner {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 56rem;
        }

        .hero-slim__title {
            margin: 1rem 0 .75rem;
            font-size: clamp(2.25rem, 5vw, 3.5rem);
            font-weight: 900;
            line-height: 1.15;
            color: #fff;
            letter-spacing: -0.02em;
        }

        .text-gradient {
            background: linear-gradient(90deg, #a78bfa, #00D4AA);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }

        .hero-slim__desc {
            color: #CBD5E1;
            font-size: 1.15rem;
            max-width: 40rem;
            margin: 0 auto 1.75rem;
        }

        .hero-slim__actions {
            display: flex;
            gap: .75rem;
            justify-content: center;
            flex-wrap: wrap;
        }

        .feature-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 2.5rem;
            align-items: center;
        }

        .feature-media {
            position: relative;
        }

        .feature-media img {
            border-radius: var(--radius-xl);
            box-shadow: var(--shadow-md);
            width: 100%;
            object-fit: cover;
            aspect-ratio: 4 / 3;
        }

        .feature-media__card {
            position: absolute;
            right: 1rem;
            bottom: 1rem;
            background: #fff;
            border-radius: 1rem;
            padding: .8rem 1.2rem;
            box-shadow: var(--shadow-md);
            display: flex;
            flex-direction: column;
        }

        .stat-num {
            font-size: 1.5rem;
            font-weight: 900;
            color: var(--primary);
            line-height: 1.2;
        }

        .stat-label {
            font-size: .75rem;
            color: var(--text-muted);
        }

        .check-list {
            list-style: none;
            padding: 0;
            margin: 0 0 1.75rem;
            display: grid;
            gap: .65rem;
        }

        .check-list li {
            position: relative;
            padding-left: 1.75rem;
            color: var(--text-body);
        }

        .check-list li::before {
            content: "✓";
            position: absolute;
            left: 0;
            top: 0;
            width: 1.35rem;
            height: 1.35rem;
            background: var(--primary);
            color: #fff;
            border-radius: 50%;
            font-size: .75rem;
            text-align: center;
            line-height: 1.35rem;
        }

        .guide-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 1.5rem;
        }

        .guide-card {
            position: relative;
            border-radius: var(--radius-xl);
            background: #fff;
            border: 1px solid var(--border);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: transform .25s, box-shadow .25s;
        }

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

        .guide-card img {
            width: 100%;
            height: 220px;
            object-fit: cover;
            transition: transform .4s;
        }

        .guide-card--lg img {
            height: 260px;
        }

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

        .guide-card__body {
            padding: 1.5rem;
            position: relative;
        }

        .guide-card__num {
            position: absolute;
            top: -3.5rem;
            right: 1rem;
            font-size: 4rem;
            font-weight: 900;
            color: rgba(124, 58, 237, .12);
            line-height: 1;
        }

        .guide-card h3 {
            margin: 0 0 .4rem;
            font-size: 1.2rem;
            font-weight: 800;
            color: var(--ink);
        }

        .guide-card p {
            margin: 0 0 1rem;
            color: var(--text-muted);
            font-size: .95rem;
        }

        .link-more {
            font-weight: 700;
            color: var(--primary);
            font-size: .9rem;
            display: inline-flex;
            align-items: center;
            gap: .2rem;
        }

        .link-more span {
            transition: transform .2s;
            display: inline-block;
        }

        .link-more:hover span {
            transform: translateX(4px);
        }

        @media (min-width: 768px) {
            .guide-grid {
                grid-template-columns: repeat(6, 1fr);
            }

            .guide-card--lg {
                grid-column: span 4;
            }

            .guide-card--default {
                grid-column: span 2;
            }

            .guide-card--wide {
                grid-column: span 3;
            }
        }

        .step-flow {
            display: grid;
            grid-template-columns: 1fr;
            gap: 1.5rem;
        }

        .step-item {
            position: relative;
            background: var(--mist);
            border: 1px solid var(--border);
            border-radius: var(--radius-xl);
            padding: 2rem 1.5rem 1.5rem;
            transition: transform .25s, box-shadow .25s;
        }

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

        .step-num {
            font-size: 2.5rem;
            font-weight: 900;
            line-height: 1;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }

        .step-item h3 {
            margin: .8rem 0 .35rem;
            font-size: 1.1rem;
            font-weight: 800;
            color: var(--ink);
        }

        .step-item p {
            margin: 0;
            color: var(--text-muted);
            font-size: .95rem;
        }

        @media (min-width: 768px) {
            .step-flow {
                grid-template-columns: repeat(3, 1fr);
                gap: 2rem;
            }
        }

        .recommend-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 1.5rem;
        }

        .content-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-xl);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: transform .25s, box-shadow .25s;
        }

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

        .content-card img {
            width: 100%;
            height: 190px;
            object-fit: cover;
            transition: transform .4s;
        }

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

        .content-card__body {
            padding: 1.25rem;
        }

        .content-card--feature {
            grid-column: 1 / -1;
            display: grid;
            grid-template-columns: 1fr;
        }

        .content-card--feature img {
            height: 100%;
            min-height: 260px;
        }

        .content-card h3 {
            margin: .6rem 0 .3rem;
            font-size: 1.05rem;
            font-weight: 800;
            color: var(--ink);
            line-height: 1.4;
        }

        .content-card p {
            margin: 0 0 .75rem;
            color: var(--text-muted);
            font-size: .9rem;
        }

        .content-card__meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            margin-top: .7rem;
            font-size: .8rem;
            color: var(--text-muted);
        }

        .tag {
            display: inline-flex;
            border-radius: 999px;
            background: rgba(124, 58, 237, .1);
            color: var(--primary);
            padding: .25rem .7rem;
            font-size: .75rem;
            font-weight: 700;
        }

        @media (min-width: 768px) {
            .recommend-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .content-card--feature {
                grid-template-columns: 1.1fr 1fr;
            }
        }

        @media (min-width: 1024px) {
            .recommend-grid {
                grid-template-columns: repeat(3, 1fr);
            }
        }

        .faq-list {
            display: grid;
            gap: .75rem;
        }

        .faq-item {
            border: 1px solid var(--border);
            border-radius: 1rem;
            overflow: hidden;
            background: #fff;
            transition: border-color .2s, box-shadow .2s;
        }

        .faq-item.open {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(124, 58, 237, .08);
        }

        .faq-q {
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 1rem;
            width: 100%;
            background: transparent;
            border: none;
            padding: 1rem 1.25rem;
            text-align: left;
            font-size: 1rem;
            font-weight: 700;
            color: var(--ink);
        }

        .faq-icon {
            position: relative;
            width: 20px;
            height: 20px;
            flex: none;
        }

        .faq-icon::before,
        .faq-icon::after {
            content: "";
            position: absolute;
            background: var(--primary);
            border-radius: 2px;
            transition: transform .25s;
        }

        .faq-icon::before {
            top: 9px;
            left: 2px;
            width: 16px;
            height: 2px;
        }

        .faq-icon::after {
            top: 2px;
            left: 9px;
            width: 2px;
            height: 16px;
        }

        .faq-item.open .faq-icon::after {
            transform: scaleY(0);
        }

        .faq-a {
            display: none;
            padding: 0 1.25rem 1.25rem;
            color: var(--text-muted);
            font-size: .95rem;
            line-height: 1.8;
        }

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

        .faq-a p {
            margin: 0;
        }

        .cta-banner {
            position: relative;
            background: linear-gradient(135deg, #0F172A, #1E1B4B);
            padding: 4.5rem 0;
            overflow: hidden;
        }

        .cta-banner::before {
            content: "";
            position: absolute;
            inset: 0;
            background: radial-gradient(500px circle at 20% 30%, rgba(124, 58, 237, .35), transparent 70%),
                radial-gradient(500px circle at 80% 70%, rgba(0, 212, 170, .2), transparent 70%);
        }

        .cta-banner .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }

        .cta-banner h2 {
            margin: 0 0 .6rem;
            color: #fff;
            font-size: clamp(1.6rem, 3vw, 2.4rem);
            font-weight: 900;
        }

        .cta-banner p {
            color: #CBD5E1;
            margin: 0 0 1.75rem;
            font-size: 1rem;
        }

        .cta-form {
            display: flex;
            gap: .6rem;
            max-width: 30rem;
            margin: 0 auto 1.25rem;
            flex-direction: column;
        }

        .cta-form input {
            flex: 1;
            padding: .8rem 1.25rem;
            border-radius: 999px;
            border: 1px solid rgba(255, 255, 255, .2);
            background: rgba(255, 255, 255, .1);
            color: #fff;
            outline: none;
            font-size: .95rem;
            transition: border-color .2s, box-shadow .2s;
        }

        .cta-form input::placeholder {
            color: #94A3B8;
        }

        .cta-form input:focus {
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(0, 212, 170, .15);
        }

        .cta-tags {
            display: flex;
            justify-content: center;
            gap: 1.25rem;
            flex-wrap: wrap;
            color: #94A3B8;
            font-size: .8rem;
        }

        .cta-tags span {
            display: inline-flex;
            align-items: center;
            gap: .35rem;
        }

        .cta-tags span::before {
            content: "";
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--accent);
        }

        .site-footer {
            background: var(--mist);
            border-top: 1px solid var(--border);
            padding: 4rem 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 2rem;
            padding-bottom: 2.5rem;
        }

        .footer-brand p {
            margin: 1rem 0 0;
            color: var(--text-muted);
            font-size: .9rem;
            max-width: 22rem;
        }

        .footer-col h4 {
            margin: 0 0 1rem;
            font-size: 1rem;
            font-weight: 800;
            color: var(--ink);
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
            display: grid;
            gap: .5rem;
        }

        .footer-col a {
            color: var(--text-muted);
            font-size: .9rem;
            transition: color .2s;
        }

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

        .footer-bottom {
            border-top: 1px solid var(--border);
            padding: 1.5rem 0;
            text-align: center;
            color: #94A3B8;
            font-size: .85rem;
        }

        @media (min-width: 768px) {
            .footer-grid {
                grid-template-columns: 1.4fr 1fr 1fr 1fr;
                gap: 3rem;
            }
        }

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

            .nav-search {
                display: none;
            }

            .header-actions .btn {
                display: none;
            }

            .nav-toggle {
                display: inline-flex;
            }
        }

        @media (min-width: 1024px) {
            .feature-grid {
                grid-template-columns: 1fr 1fr;
                gap: 4rem;
            }
        }

        @media (max-width: 639px) {
            .header-inner {
                height: 64px;
            }

            .hero-slim {
                padding: 3.5rem 0;
            }

            .section {
                padding: 3.5rem 0;
            }

            .guide-grid {
                gap: 1rem;
            }
        }

/* roulang page: category2 */
:root {
            --brand: #7C3AED;
            --brand-light: #A855F7;
            --brand-dark: #6D28D9;
            --accent: #00D4AA;
            --ink: #0F172A;
            --ink-light: #1E293B;
            --surface: #F8FAFC;
            --text-main: #334155;
            --text-muted: #64748B;
            --text-sub: #94A3B8;
            --border: #E2E8F0;
            --radius: 1rem;
            --radius-lg: 1.5rem;
            --shadow-sm: 0 1px 3px rgba(15, 23, 42, .06);
            --shadow-md: 0 10px 30px rgba(15, 23, 42, .08);
            --shadow-glow: 0 0 40px rgba(124, 58, 237, .15);
            --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-sans);
            background: #fff;
            color: var(--text-main);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            text-rendering: optimizeLegibility;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color .2s ease;
        }
        a:hover {
            color: var(--brand);
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
            font-family: inherit;
        }
        input {
            font-family: inherit;
        }
        .container {
            max-width: 80rem;
            margin: 0 auto;
            padding-left: 1.25rem;
            padding-right: 1.25rem;
        }
        @media (min-width: 640px) {
            .container {
                padding-left: 1.5rem;
                padding-right: 1.5rem;
            }
        }
        @media (min-width: 1024px) {
            .container {
                padding-left: 2rem;
                padding-right: 2rem;
            }
        }

        /* Header */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: #fff;
            border-bottom: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
        }
        .header-inner {
            display: flex;
            align-items: center;
            gap: 1.25rem;
            height: 72px;
        }
        .logo {
            display: inline-flex;
            align-items: center;
            gap: .6rem;
            flex-shrink: 0;
        }
        .logo__icon {
            width: 34px;
            height: 34px;
            border-radius: 10px;
            box-shadow: 0 4px 14px rgba(124, 58, 237, .3);
        }
        .logo span {
            font-size: 1.15rem;
            font-weight: 800;
            color: #0F172A;
            letter-spacing: -.02em;
            white-space: nowrap;
        }
        .logo__em {
            font-style: normal;
            background: linear-gradient(90deg, var(--brand), var(--accent));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: .25rem;
            margin: 0 auto;
        }
        .nav-link {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 40px;
            padding: 0 .9rem;
            font-size: .95rem;
            font-weight: 500;
            color: var(--text-main);
            border-radius: 9999px;
            position: relative;
            transition: color .2s, background .2s;
        }
        .nav-link:hover {
            color: var(--brand);
            background: rgba(124, 58, 237, .06);
        }
        .nav-link.active {
            color: var(--brand);
            font-weight: 700;
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            left: 1rem;
            right: 1rem;
            bottom: 4px;
            height: 2px;
            border-radius: 2px;
            background: linear-gradient(90deg, var(--brand), var(--accent));
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: .75rem;
        }
        .search-box {
            display: flex;
            align-items: center;
            gap: .5rem;
            width: 180px;
            height: 40px;
            padding: 0 .9rem;
            background: var(--surface);
            border: 1px solid transparent;
            border-radius: 9999px;
            transition: border-color .2s, box-shadow .2s, width .2s;
        }
        .search-box:focus-within {
            border-color: var(--brand);
            box-shadow: 0 0 0 3px rgba(124, 58, 237, .12);
            width: 210px;
        }
        .search-box__icon {
            width: 18px;
            height: 18px;
            color: var(--text-sub);
            flex-shrink: 0;
        }
        .search-box input {
            width: 100%;
            border: none;
            outline: none;
            background: transparent;
            font-size: .875rem;
            color: var(--text-main);
        }
        .search-box input::placeholder {
            color: var(--text-sub);
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            width: 42px;
            height: 42px;
            align-items: center;
            justify-content: center;
            border-radius: 10px;
        }
        .nav-toggle span {
            display: block;
            width: 20px;
            height: 2px;
            background: #0F172A;
            border-radius: 2px;
            transition: transform .2s, opacity .2s;
        }
        .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);
        }

        /* Buttons */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: .5rem;
            font-weight: 600;
            border-radius: 9999px;
            transition: all .2s ease;
            white-space: nowrap;
        }
        .btn-primary {
            background: linear-gradient(90deg, var(--brand), var(--accent));
            color: #fff;
            box-shadow: 0 6px 20px rgba(124, 58, 237, .28);
        }
        .btn-primary:hover {
            filter: brightness(1.08);
            transform: translateY(-2px);
            box-shadow: 0 10px 24px rgba(124, 58, 237, .36);
            color: #fff;
        }
        .btn-primary:active {
            transform: scale(.96);
        }
        .btn-ghost {
            background: rgba(255, 255, 255, .08);
            border: 1px solid rgba(255, 255, 255, .24);
            color: #fff;
        }
        .btn-ghost:hover {
            border-color: var(--accent);
            color: var(--accent);
            background: rgba(255, 255, 255, .12);
        }
        .btn-sm {
            height: 40px;
            padding: 0 1.1rem;
            font-size: .875rem;
        }
        .btn-lg {
            height: 50px;
            padding: 0 1.8rem;
            font-size: 1rem;
        }

        /* Hero */
        .category-hero {
            position: relative;
            background: var(--ink);
            color: #fff;
            overflow: hidden;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            z-index: 1;
            background: radial-gradient(60% 80% at 20% 20%, rgba(124, 58, 237, .35), transparent 60%), radial-gradient(40% 60% at 80% 80%, rgba(0, 212, 170, .22), transparent 70%);
        }
        .category-hero__bg {
            position: absolute;
            inset: 0;
            opacity: .28;
            background-size: cover;
            background-position: center;
            z-index: 0;
        }
        .category-hero__content {
            position: relative;
            z-index: 2;
            padding-top: 4.5rem;
            padding-bottom: 5rem;
            max-width: 64rem;
        }
        .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: .5rem;
            height: 32px;
            padding: 0 .9rem;
            font-size: .8rem;
            font-weight: 600;
            letter-spacing: .06em;
            color: #C4B5FD;
            background: rgba(124, 58, 237, .18);
            border: 1px solid rgba(167, 139, 250, .3);
            border-radius: 9999px;
        }
        .category-hero h1 {
            margin-top: 1.5rem;
            font-size: clamp(2.1rem, 5vw, 3.4rem);
            font-weight: 900;
            line-height: 1.15;
            letter-spacing: -.02em;
        }
        .text-gradient {
            background: linear-gradient(90deg, #C4B5FD, var(--accent));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }
        .hero-lead {
            margin-top: 1.2rem;
            max-width: 42rem;
            font-size: 1.1rem;
            line-height: 1.8;
            color: #CBD5E1;
        }
        .hero-actions {
            margin-top: 2rem;
            display: flex;
            flex-wrap: wrap;
            gap: .8rem;
        }
        .hero-meta {
            margin-top: 2.5rem;
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            color: #94A3B8;
            font-size: .875rem;
        }
        .hero-meta span {
            display: inline-flex;
            align-items: center;
            gap: .4rem;
        }
        .hero-meta svg {
            width: 16px;
            height: 16px;
            color: var(--accent);
        }
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(24px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .category-hero__content>* {
            animation: fadeInUp .6s ease both;
        }
        .category-hero__content>*:nth-child(2) {
            animation-delay: .1s;
        }
        .category-hero__content>*:nth-child(3) {
            animation-delay: .2s;
        }
        .category-hero__content>*:nth-child(4) {
            animation-delay: .3s;
        }

        /* Section common */
        .section-pad {
            padding-top: 5rem;
            padding-bottom: 5rem;
        }
        .section-label {
            display: inline-block;
            font-size: .82rem;
            font-weight: 700;
            letter-spacing: .08em;
            text-transform: uppercase;
            color: var(--brand);
            margin-bottom: .6rem;
        }
        .section-title {
            font-size: clamp(1.6rem, 3vw, 2.2rem);
            font-weight: 800;
            letter-spacing: -.01em;
            color: #0F172A;
            line-height: 1.25;
        }
        .section-desc {
            margin-top: .8rem;
            color: var(--text-muted);
            max-width: 42rem;
            font-size: 1rem;
            line-height: 1.8;
        }

        /* Intro */
        .intro-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 3rem;
            align-items: center;
        }
        .intro-copy h2 {
            font-size: clamp(1.5rem, 3vw, 2rem);
            font-weight: 800;
            color: #0F172A;
            line-height: 1.3;
            letter-spacing: -.01em;
        }
        .intro-copy>p {
            margin-top: 1rem;
            color: var(--text-muted);
            line-height: 1.9;
        }
        .check-list {
            list-style: none;
            margin-top: 1.8rem;
            display: grid;
            gap: .9rem;
        }
        .check-list li {
            display: flex;
            gap: .7rem;
            align-items: flex-start;
            font-size: .95rem;
            color: var(--text-main);
            line-height: 1.6;
        }
        .check-list li svg {
            flex-shrink: 0;
            width: 20px;
            height: 20px;
            color: var(--accent);
            margin-top: 2px;
        }
        .intro-media {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
        }
        .intro-media img {
            width: 100%;
            height: 100%;
            min-height: 320px;
            object-fit: cover;
        }
        .intro-media::after {
            content: '';
            position: absolute;
            inset: 0;
            border: 1px solid rgba(124, 58, 237, .2);
            border-radius: var(--radius-lg);
            pointer-events: none;
        }

        /* Coverage cards */
        .coverage-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 1.5rem;
        }
        .coverage-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
            display: flex;
            flex-direction: column;
        }
        .coverage-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: rgba(124, 58, 237, .3);
        }
        .coverage-card__media {
            overflow: hidden;
        }
        .coverage-card__media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .4s ease;
        }
        .coverage-card:hover .coverage-card__media img {
            transform: scale(1.05);
        }
        .coverage-card__body {
            padding: 1.5rem;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .card-tag {
            display: inline-flex;
            align-items: center;
            height: 26px;
            padding: 0 .7rem;
            font-size: .78rem;
            font-weight: 600;
            color: var(--brand);
            background: rgba(124, 58, 237, .08);
            border-radius: 9999px;
            align-self: flex-start;
        }
        .coverage-card__body h3 {
            margin-top: .8rem;
            font-size: 1.15rem;
            font-weight: 700;
            color: #0F172A;
            line-height: 1.4;
        }
        .coverage-card__body p {
            margin-top: .5rem;
            color: var(--text-muted);
            font-size: .9rem;
            line-height: 1.7;
            flex: 1;
        }
        .coverage-card__link {
            margin-top: 1.1rem;
            font-size: .9rem;
            font-weight: 600;
            color: var(--brand);
            display: inline-flex;
            align-items: center;
            gap: .3rem;
        }
        .coverage-card__link:hover {
            color: var(--brand-dark);
            gap: .5rem;
        }

        /* Hot list */
        .hot-list {
            display: grid;
            gap: .75rem;
        }
        .hot-item {
            display: flex;
            align-items: center;
            gap: 1.25rem;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 1rem 1.25rem;
            transition: background .2s ease, border-color .2s ease, transform .2s ease, box-shadow .2s ease;
        }
        .hot-item:hover {
            background: var(--surface);
            border-color: rgba(124, 58, 237, .3);
            transform: translateX(4px);
            box-shadow: var(--shadow-sm);
        }
        .hot-index {
            font-size: 1.05rem;
            font-weight: 900;
            font-style: italic;
            color: var(--text-sub);
            min-width: 2rem;
            letter-spacing: -.02em;
        }
        .hot-item:nth-child(1) .hot-index {
            color: var(--brand);
        }
        .hot-item:nth-child(2) .hot-index {
            color: var(--brand-light);
        }
        .hot-item:nth-child(3) .hot-index {
            color: var(--accent);
        }
        .hot-card {
            flex: 1;
            min-width: 0;
        }
        .hot-card__badge {
            display: inline-block;
            font-size: .75rem;
            font-weight: 600;
            color: var(--text-muted);
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 9999px;
            padding: .15rem .55rem;
            margin-bottom: .25rem;
        }
        .hot-card h3 {
            font-size: .98rem;
            font-weight: 600;
            color: #0F172A;
            line-height: 1.45;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }
        .hot-item:hover .hot-card h3 {
            color: var(--brand);
        }
        .hot-meta {
            font-size: .8rem;
            color: var(--text-sub);
            display: flex;
            align-items: center;
            gap: .3rem;
            white-space: nowrap;
        }
        .hot-meta svg {
            width: 14px;
            height: 14px;
            color: #F59E0B;
        }
        .hot-link {
            font-size: .85rem;
            font-weight: 600;
            color: var(--brand);
            white-space: nowrap;
        }

        /* Steps */
        .steps-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 1.5rem;
        }
        .step-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 1.75rem 1.5rem;
            box-shadow: var(--shadow-sm);
            transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
            position: relative;
            overflow: hidden;
        }
        .step-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: rgba(124, 58, 237, .25);
        }
        .step-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 1.5rem;
            right: 1.5rem;
            height: 3px;
            border-radius: 0 0 4px 4px;
            background: linear-gradient(90deg, var(--brand), var(--accent));
            opacity: 0;
            transition: opacity .25s ease;
        }
        .step-card:hover::before {
            opacity: 1;
        }
        .step-num {
            display: inline-flex;
            font-size: .82rem;
            font-weight: 800;
            letter-spacing: .08em;
            color: var(--brand);
            background: rgba(124, 58, 237, .08);
            border-radius: 9999px;
            padding: .25rem .75rem;
        }
        .step-card h3 {
            margin-top: 1rem;
            font-size: 1.1rem;
            font-weight: 700;
            color: #0F172A;
        }
        .step-card p {
            margin-top: .5rem;
            font-size: .9rem;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* FAQ */
        .faq-list {
            max-width: 48rem;
            margin: 0 auto;
            display: grid;
            gap: .75rem;
        }
        .faq-item {
            border: 1px solid var(--border);
            border-radius: var(--radius);
            background: #fff;
            overflow: hidden;
            transition: border-color .25s ease, box-shadow .25s ease;
        }
        .faq-item.open {
            border-color: var(--brand);
            box-shadow: 0 6px 24px rgba(124, 58, 237, .1);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            padding: 1.1rem 1.25rem;
            font-size: 1rem;
            font-weight: 600;
            color: #0F172A;
            text-align: left;
            background: transparent;
            transition: color .2s ease;
        }
        .faq-question:hover {
            color: var(--brand);
        }
        .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: rgba(124, 58, 237, .08);
            color: var(--brand);
            font-size: 1.15rem;
            font-weight: 400;
            transition: transform .25s ease, background .25s ease;
        }
        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            background: var(--brand);
            color: #fff;
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .3s ease;
        }
        .faq-answer p {
            padding: 0 1.25rem 1.25rem;
            color: var(--text-muted);
            font-size: .93rem;
            line-height: 1.8;
        }

        /* CTA */
        .cta-section {
            position: relative;
            background: linear-gradient(120deg, #0F172A, #1E1B4B);
            overflow: hidden;
            padding-top: 4.5rem;
            padding-bottom: 4.5rem;
            text-align: center;
            color: #fff;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            width: 420px;
            height: 420px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(0, 212, 170, .22), transparent 70%);
            top: -160px;
            right: -100px;
            pointer-events: none;
        }
        .cta-section::after {
            content: '';
            position: absolute;
            width: 360px;
            height: 360px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(124, 58, 237, .3), transparent 70%);
            bottom: -140px;
            left: -80px;
            pointer-events: none;
        }
        .cta-content {
            position: relative;
            z-index: 2;
        }
        .cta-content h2 {
            font-size: clamp(1.7rem, 3.4vw, 2.4rem);
            font-weight: 900;
            line-height: 1.3;
            letter-spacing: -.01em;
        }
        .cta-content p {
            margin-top: .9rem;
            max-width: 34rem;
            margin-left: auto;
            margin-right: auto;
            color: #94A3B8;
            font-size: 1rem;
            line-height: 1.8;
        }
        .cta-content .btn {
            margin-top: 1.8rem;
        }

        /* Footer */
        .site-footer {
            background: #F8FAFC;
            border-top: 1px solid var(--border);
            padding-top: 3.5rem;
            padding-bottom: 2rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 2.25rem;
        }
        .footer-brand p {
            margin-top: .9rem;
            max-width: 20rem;
            font-size: .9rem;
            color: var(--text-muted);
            line-height: 1.7;
        }
        .footer-col h4 {
            font-size: .95rem;
            font-weight: 700;
            color: #0F172A;
            margin-bottom: .85rem;
        }
        .footer-col ul {
            list-style: none;
            display: grid;
            gap: .5rem;
        }
        .footer-col a,
        .footer-col li {
            font-size: .9rem;
            color: var(--text-muted);
            transition: color .2s ease;
        }
        .footer-col a:hover {
            color: var(--brand);
        }
        .footer-bottom {
            margin-top: 2.5rem;
            padding-top: 1.4rem;
            border-top: 1px solid var(--border);
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: .75rem;
            font-size: .84rem;
            color: var(--text-sub);
        }

        /* Back to top */
        .back-to-top {
            position: fixed;
            right: 1.25rem;
            bottom: 1.25rem;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--brand), var(--accent));
            color: #fff;
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 8px 24px rgba(124, 58, 237, .35);
            opacity: 0;
            pointer-events: none;
            transform: translateY(12px);
            transition: opacity .3s ease, transform .3s ease;
            z-index: 60;
        }
        .back-to-top.visible {
            opacity: 1;
            pointer-events: auto;
            transform: translateY(0);
        }
        .back-to-top:hover {
            filter: brightness(1.1);
        }
        .back-to-top:active {
            transform: scale(.95);
        }

        /* Responsive */
        @media (max-width: 1023px) {
            .nav-toggle {
                display: flex;
            }
            .header-actions {
                margin-left: auto;
            }
            .main-nav {
                position: absolute;
                top: 72px;
                left: 0;
                right: 0;
                background: #fff;
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow-md);
                flex-direction: column;
                align-items: stretch;
                gap: .25rem;
                padding: .75rem 1rem 1rem;
                transform: translateY(-12px);
                opacity: 0;
                pointer-events: none;
                transition: opacity .2s ease, transform .2s ease;
            }
            .main-nav.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-link {
                justify-content: flex-start;
                height: 44px;
                padding: 0 .75rem;
                border-radius: .75rem;
            }
            .nav-link.active::after {
                display: none;
            }
            .search-box {
                display: none;
            }
        }
        @media (min-width: 640px) {
            .footer-grid {
                grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
            }
        }
        @media (min-width: 768px) {
            .intro-grid {
                grid-template-columns: 1fr 1fr;
            }
            .coverage-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .coverage-card--lg {
                grid-row: span 2;
            }
            .steps-grid {
                grid-template-columns: repeat(3, 1fr);
            }
        }
        @media (min-width: 1024px) {
            .coverage-grid {
                grid-template-columns: repeat(3, 1fr);
            }
            .cover-lg-media {
                min-height: 420px;
            }
        }
        @media (max-width: 767px) {
            .hot-item {
                flex-wrap: wrap;
                padding: .9rem 1rem;
            }
            .hot-card h3 {
                white-space: normal;
                display: -webkit-box;
                -webkit-line-clamp: 2;
                -webkit-box-orient: vertical;
                overflow: hidden;
            }
            .hot-meta {
                display: none;
            }
            .hot-link {
                font-size: .82rem;
            }
            .hot-index {
                min-width: 1.6rem;
            }
        }
        @media (max-width: 520px) {
            .hero-actions .btn {
                width: 100%;
            }
            .header-actions .btn {
                padding: 0 .9rem;
                font-size: .82rem;
            }
            .logo span {
                font-size: 1.02rem;
            }
            .section-pad {
                padding-top: 3.5rem;
                padding-bottom: 3.5rem;
            }
        }