/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --bg-base: #070E1A;
            --bg-panel: #0C1526;
            --bg-deep: #050B14;
            --bg-glass: rgba(255, 255, 255, 0.05);
            --bg-glass-hover: rgba(255, 255, 255, 0.09);
            --border-glass: rgba(255, 255, 255, 0.10);
            --border-glass-strong: rgba(255, 255, 255, 0.2);
            --primary: #3B82F6;
            --primary-light: #60A5FA;
            --cyan-glow: #22D3EE;
            --green-accent: #4ADE80;
            --text-high: #F2F6FC;
            --text-mid: #B0BED0;
            --text-low: #6B7A90;
            --radius-card: 16px;
            --radius-btn: 10px;
            --radius-tag: 999px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.35);
            --shadow-card-hover: 0 14px 40px rgba(0, 0, 0, 0.45);
            --glow-primary: 0 0 30px rgba(59, 130, 246, 0.35);
            --glow-cyan: 0 0 24px rgba(34, 211, 238, 0.3);
            --glow-green: 0 0 20px rgba(74, 222, 128, 0.25);
            --header-h: 64px;
            --channel-h: 46px;
            --max-w: 1200px;
        }

        /* ===== 基础重置 ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Inter", sans-serif;
            background: var(--bg-base);
            color: var(--text-high);
            line-height: 1.8;
            font-size: 15px;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color .25s ease;
        }
        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
        }
        input {
            font-family: inherit;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5 {
            line-height: 1.3;
            font-weight: 700;
        }

        /* ===== 布局容器 ===== */
        .wrap {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .section {
            padding: 90px 0;
        }
        .section-head {
            margin-bottom: 48px;
            position: relative;
            padding-left: 14px;
        }
        .section-head .bar {
            position: absolute;
            left: 0;
            top: 8px;
            width: 4px;
            height: 26px;
            border-radius: 4px;
            background: linear-gradient(180deg, var(--primary), var(--cyan-glow));
        }
        .section-head h2 {
            font-size: clamp(24px, 3vw, 34px);
            font-weight: 700;
            color: var(--text-high);
            letter-spacing: -0.01em;
        }
        .section-head p {
            margin-top: 10px;
            color: var(--text-mid);
            font-size: 15px;
            max-width: 640px;
        }

        /* ===== 按钮体系 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 600;
            line-height: 1;
            transition: all .28s ease;
            border: 1px solid transparent;
            white-space: nowrap;
        }
        .btn-primary {
            background: linear-gradient(135deg, #3B82F6, #22D3EE);
            color: #fff;
            box-shadow: var(--glow-primary);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 40px rgba(34, 211, 238, 0.5);
            filter: brightness(1.1);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 0 20px rgba(34, 211, 238, 0.3);
        }
        .btn-secondary {
            background: transparent;
            border: 1px solid var(--border-glass-strong);
            color: var(--text-high);
        }
        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.06);
            border-color: var(--cyan-glow);
            transform: translateY(-2px);
        }
        .btn-lg {
            height: 52px;
            padding: 0 36px;
            border-radius: 12px;
            font-size: 16px;
        }
        .btn-sm {
            padding: 9px 20px;
            font-size: 14px;
            border-radius: 8px;
        }
        .btn:focus-visible {
            outline: 3px solid rgba(34, 211, 238, 0.4);
            outline-offset: 2px;
        }

        /* ===== 导航 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(7, 14, 26, 0.82);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid transparent;
            transition: all .3s ease;
        }
        .site-header.scrolled {
            background: rgba(7, 14, 26, 0.92);
            border-bottom-color: var(--border-glass);
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
        }
        .header-brand-row {
            height: var(--header-h);
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }
        .header-brand-inner {
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: linear-gradient(135deg, #3B82F6, #22D3EE);
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: var(--glow-primary);
        }
        .logo-text {
            font-size: 20px;
            font-weight: 800;
            letter-spacing: -0.02em;
            color: var(--text-high);
            background: linear-gradient(135deg, #F2F6FC, #BFDBFE);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 14px;
        }
        .hamburger {
            display: none;
            width: 42px;
            height: 42px;
            border-radius: 10px;
            border: 1px solid var(--border-glass);
            background: var(--bg-glass);
            align-items: center;
            justify-content: center;
            transition: all .25s ease;
        }
        .hamburger:hover {
            background: var(--bg-glass-hover);
            border-color: var(--border-glass-strong);
        }
        .header-channel-row {
            height: var(--channel-h);
        }
        .channel-nav {
            height: 100%;
            display: flex;
            align-items: center;
            gap: 6px;
            overflow-x: auto;
            scrollbar-width: none;
        }
        .channel-nav::-webkit-scrollbar {
            display: none;
        }
        .channel-link {
            display: inline-flex;
            align-items: center;
            padding: 7px 18px;
            border-radius: var(--radius-tag);
            font-size: 14px;
            font-weight: 500;
            color: var(--text-mid);
            white-space: nowrap;
            border-bottom: 2px solid transparent;
            transition: all .25s ease;
        }
        .channel-link:hover {
            color: var(--text-high);
            background: rgba(255, 255, 255, 0.05);
        }
        .channel-link.active {
            color: var(--cyan-glow);
            background: rgba(34, 211, 238, 0.12);
            border-bottom-color: var(--cyan-glow);
            font-weight: 600;
        }

        /* ===== 移动端菜单 ===== */
        .mobile-menu {
            display: none;
            position: fixed;
            top: 0;
            right: 0;
            width: 280px;
            height: 100vh;
            z-index: 60;
            background: var(--bg-panel);
            border-left: 1px solid var(--border-glass);
            padding: 24px;
            transform: translateX(100%);
            transition: transform .35s ease;
            box-shadow: -20px 0 60px rgba(0, 0, 0, 0.5);
        }
        .mobile-menu.open {
            transform: translateX(0);
        }
        .mobile-menu-backdrop {
            display: none;
            position: fixed;
            inset: 0;
            z-index: 55;
            background: rgba(0, 0, 0, 0.5);
            backdrop-filter: blur(4px);
        }
        .mobile-menu-backdrop.show {
            display: block;
        }
        .mobile-menu-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 28px;
        }
        .mobile-menu-close {
            width: 36px;
            height: 36px;
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--bg-glass);
            color: var(--text-mid);
            transition: all .2s ease;
        }
        .mobile-menu-close:hover {
            background: var(--bg-glass-hover);
            color: var(--text-high);
        }
        .mobile-menu-nav {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .mobile-menu-link {
            padding: 14px 16px;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-mid);
            transition: all .2s ease;
        }
        .mobile-menu-link:hover {
            background: var(--bg-glass);
            color: var(--text-high);
        }
        .mobile-menu-link.active {
            background: rgba(34, 211, 238, 0.12);
            color: var(--cyan-glow);
            font-weight: 600;
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            padding: 80px 0 0;
            overflow: hidden;
            background:
                radial-gradient(ellipse at 15% 0%, rgba(59, 130, 246, 0.22), transparent 55%),
                radial-gradient(ellipse at 85% 20%, rgba(34, 211, 238, 0.1), transparent 45%),
                var(--bg-base);
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image:
                linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
            background-size: 60px 60px;
            pointer-events: none;
        }
        .hero-inner {
            position: relative;
            display: flex;
            align-items: center;
            gap: 60px;
            padding-bottom: 60px;
            min-height: 520px;
        }
        .hero-content {
            flex: 1.1;
            z-index: 2;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 16px;
            border-radius: var(--radius-tag);
            background: rgba(34, 211, 238, 0.1);
            border: 1px solid rgba(34, 211, 238, 0.3);
            color: var(--cyan-glow);
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 24px;
        }
        .hero-badge::before {
            content: '';
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--cyan-glow);
            box-shadow: 0 0 8px var(--cyan-glow);
        }
        .hero-title {
            font-size: clamp(40px, 6vw, 58px);
            font-weight: 800;
            line-height: 1.15;
            letter-spacing: -0.02em;
            margin-bottom: 20px;
        }
        .gradient-text {
            background: linear-gradient(135deg, #60A5FA, #22D3EE);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .hero-title-sub {
            display: block;
            margin-top: 8px;
            color: var(--text-high);
        }
        .hero-subtitle {
            color: var(--text-mid);
            font-size: 16px;
            margin-bottom: 32px;
            max-width: 520px;
        }
        .hero-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
            margin-bottom: 32px;
        }
        .hero-points {
            display: flex;
            gap: 24px;
            flex-wrap: wrap;
        }
        .hero-points span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            color: var(--text-mid);
        }
        .hero-points svg {
            width: 16px;
            height: 16px;
            color: var(--green-accent);
            flex-shrink: 0;
        }
        .hero-visual {
            flex: 0.9;
            position: relative;
            z-index: 1;
        }
        .hero-img {
            width: 100%;
            border-radius: 20px;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5), 0 0 80px rgba(59, 130, 246, 0.2);
            border: 1px solid var(--border-glass);
            object-fit: cover;
            aspect-ratio: 4/3;
        }
        .hero-glow {
            position: absolute;
            inset: -30px;
            background: radial-gradient(circle, rgba(34, 211, 238, 0.15), transparent 60%);
            z-index: -1;
            border-radius: 30px;
        }

        /* ===== 数据信任条 ===== */
        .trust-bar {
            position: relative;
            z-index: 3;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            background: var(--bg-glass);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            margin-bottom: 40px;
            overflow: hidden;
        }
        .trust-item {
            padding: 28px 20px;
            text-align: center;
            position: relative;
        }
        .trust-item:not(:last-child)::after {
            content: '';
            position: absolute;
            right: 0;
            top: 20%;
            height: 60%;
            width: 1px;
            background: var(--border-glass);
        }
        .trust-num {
            font-family: "Inter", "DIN Alternate", "Roboto", sans-serif;
            font-size: 30px;
            font-weight: 800;
            color: var(--green-accent);
            /* text-shadow: var(--glow-green); */
            line-height: 1.2;
            letter-spacing: -0.01em;
        }
        .trust-label {
            font-size: 13px;
            color: var(--text-mid);
            margin-top: 6px;
        }

        /* ===== 步骤卡片 ===== */
        .steps {
            background: var(--bg-base);
            position: relative;
        }
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            position: relative;
        }
        .step-card {
            background: var(--bg-glass);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 32px;
            position: relative;
            transition: all .3s ease;
            overflow: hidden;
        }
        .step-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 10%;
            right: 10%;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.25), transparent);
        }
        .step-card:hover {
            transform: translateY(-4px);
            background: var(--bg-glass-hover);
            border-color: var(--border-glass-strong);
            box-shadow: var(--shadow-card-hover);
        }
        .step-num {
            font-size: 44px;
            font-weight: 800;
            line-height: 1;
            display: block;
            background: linear-gradient(135deg, rgba(59, 130, 246, 0.8), rgba(34, 211, 238, 0.6));
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            margin-bottom: 18px;
            letter-spacing: -0.04em;
        }
        .step-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(34, 211, 238, 0.1);
            border: 1px solid rgba(34, 211, 238, 0.2);
            color: var(--cyan-glow);
            margin-bottom: 20px;
        }
        .step-icon svg {
            width: 24px;
            height: 24px;
        }
        .step-card h3 {
            font-size: 19px;
            font-weight: 600;
            margin-bottom: 12px;
            color: var(--text-high);
        }
        .step-card p {
            font-size: 14px;
            line-height: 1.7;
            color: var(--text-mid);
        }
        .step-connector {
            display: none;
        }
        @media (min-width: 1024px) {
            .step-connector {
                display: block;
                position: absolute;
                top: 50%;
                width: 24px;
                border-top: 2px dashed rgba(255, 255, 255, 0.15);
                z-index: 0;
            }
            .step-connector:nth-of-type(2) {
                left: calc(33.333% - 19px);
            }
            .step-connector:nth-of-type(4) {
                left: calc(66.666% - 19px);
            }
            .step-connector::after {
                content: '';
                position: absolute;
                right: -2px;
                top: -5px;
                width: 8px;
                height: 8px;
                border-top: 2px solid rgba(255, 255, 255, 0.2);
                border-right: 2px solid rgba(255, 255, 255, 0.2);
                transform: rotate(45deg);
            }
        }

        /* ===== 案例卡片 ===== */
        .cases {
            background: linear-gradient(180deg, var(--bg-base), var(--bg-panel), var(--bg-base));
        }
        .cases-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .case-card {
            background: var(--bg-glass);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: all .3s ease;
        }
        .case-card:hover {
            transform: translateY(-4px);
            background: var(--bg-glass-hover);
            border-color: var(--border-glass-strong);
            box-shadow: var(--shadow-card-hover);
        }
        .case-img {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            border-bottom: 1px solid var(--border-glass);
        }
        .case-body {
            padding: 24px;
        }
        .case-tag {
            display: inline-block;
            padding: 4px 12px;
            border-radius: var(--radius-tag);
            background: rgba(34, 211, 238, 0.1);
            border: 1px solid rgba(34, 211, 238, 0.2);
            color: var(--cyan-glow);
            font-size: 12px;
            font-weight: 600;
            margin-bottom: 12px;
        }
        .case-body h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--text-high);
        }
        .case-body p {
            font-size: 14px;
            color: var(--text-mid);
            line-height: 1.7;
            margin-bottom: 16px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .case-data {
            display: inline-block;
            padding: 4px 14px;
            border-radius: var(--radius-tag);
            background: rgba(74, 222, 128, 0.12);
            border: 1px solid rgba(74, 222, 128, 0.25);
            color: var(--green-accent);
            font-size: 13px;
            font-weight: 600;
        }

        /* ===== 最新资讯 ===== */
        .news {
            background: var(--bg-base);
        }
        .news-head-row {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 20px;
            flex-wrap: wrap;
            margin-bottom: 16px;
        }
        .more-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-mid);
            padding: 8px 16px;
            border-radius: var(--radius-tag);
            border: 1px solid var(--border-glass);
            background: var(--bg-glass);
            transition: all .25s ease;
            margin-bottom: 32px;
        }
        .more-link:hover {
            color: var(--cyan-glow);
            border-color: rgba(34, 211, 238, 0.3);
            transform: translateX(4px);
        }
        .news-list {
            border-radius: var(--radius-card);
            border: 1px solid var(--border-glass);
            background: var(--bg-glass);
            padding: 8px 24px;
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
        }
        .news-row {
            display: flex;
            align-items: center;
            gap: 20px;
            padding: 18px 8px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            transition: all .25s ease;
            border-radius: 10px;
        }
        .news-row:last-child {
            border-bottom: none;
        }
        .news-row:hover {
            background: var(--bg-glass-hover);
            padding-left: 16px;
        }
        .news-row:hover .news-title {
            color: var(--cyan-glow);
        }
        .news-cat {
            flex-shrink: 0;
            padding: 3px 12px;
            border-radius: var(--radius-tag);
            background: rgba(34, 211, 238, 0.1);
            border: 1px solid rgba(34, 211, 238, 0.2);
            color: var(--cyan-glow);
            font-size: 12px;
            font-weight: 600;
            white-space: nowrap;
        }
        .news-title {
            flex: 1;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-high);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            transition: color .25s ease;
            min-width: 0;
        }
        .news-date {
            flex-shrink: 0;
            font-size: 13px;
            color: var(--text-low);
            font-family: "Inter", "Roboto", sans-serif;
        }
        .empty-state {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            padding: 48px 20px;
            border: 2px dashed var(--border-glass-strong);
            border-radius: var(--radius-card);
            color: var(--text-low);
            text-align: center;
        }
        .empty-state svg {
            width: 36px;
            height: 36px;
            margin-bottom: 12px;
            opacity: 0.6;
        }
        .empty-state p {
            font-size: 14px;
        }

        /* ===== FAQ ===== */
        .faq {
            background: linear-gradient(180deg, var(--bg-base), #0A1220);
        }
        .faq-list {
            max-width: 860px;
            margin: 0 auto;
        }
        .faq-item {
            border: 1px solid var(--border-glass);
            border-radius: 12px;
            background: var(--bg-glass);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            margin-bottom: 12px;
            overflow: hidden;
            transition: border-color .3s ease, background .3s ease;
        }
        .faq-item.active {
            border-color: rgba(34, 211, 238, 0.3);
            background: var(--bg-glass-hover);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 20px;
            text-align: left;
            color: var(--text-high);
            font-size: 15px;
            font-weight: 600;
            line-height: 1.4;
            transition: color .25s ease;
        }
        .faq-question:hover {
            color: var(--cyan-glow);
        }
        .faq-icon {
            width: 18px;
            height: 18px;
            flex-shrink: 0;
            color: var(--text-mid);
            transition: transform .35s ease, color .25s ease;
        }
        .faq-item.active .faq-icon {
            color: var(--cyan-glow);
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .4s ease;
        }
        .faq-answer-inner {
            padding: 0 20px 18px;
            font-size: 14px;
            line-height: 1.7;
            color: var(--text-mid);
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding-top: 14px;
            margin-top: 0;
        }

        /* ===== CTA ===== */
        .cta {
            position: relative;
            padding: 90px 0;
            background: linear-gradient(135deg, #0C1526, #1A2744);
            overflow: hidden;
        }
        .cta::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 50% 120%, rgba(34, 211, 238, 0.2), transparent 55%);
        }
        .cta::after {
            content: '';
            position: absolute;
            inset: 0;
            background-image:
                linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
            background-size: 50px 50px;
            pointer-events: none;
        }
        .cta-inner {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 760px;
        }
        .cta h2 {
            font-size: clamp(26px, 4vw, 40px);
            font-weight: 800;
            margin-bottom: 14px;
            letter-spacing: -0.02em;
        }
        .cta p {
            color: var(--text-mid);
            font-size: 15px;
            margin-bottom: 36px;
        }
        .cta-form {
            display: flex;
            gap: 12px;
            justify-content: center;
            flex-wrap: wrap;
            margin-bottom: 14px;
        }
        .cta-form input {
            height: 52px;
            width: 320px;
            max-width: 100%;
            padding: 0 20px;
            border-radius: 10px;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--border-glass);
            color: var(--text-high);
            font-size: 15px;
            transition: all .25s ease;
            outline: none;
        }
        .cta-form input::placeholder {
            color: var(--text-low);
        }
        .cta-form input:focus {
            border-color: var(--cyan-glow);
            box-shadow: var(--glow-cyan);
        }
        .cta-note {
            font-size: 12px;
            color: var(--text-low);
            margin-bottom: 0;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-deep);
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            padding-top: 60px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 48px;
        }
        .footer-col h4 {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-high);
            margin-bottom: 16px;
        }
        .footer-col a {
            display: block;
            font-size: 14px;
            color: var(--text-mid);
            margin-bottom: 10px;
            transition: color .25s ease;
        }
        .footer-col a:hover {
            color: var(--cyan-glow);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            padding: 20px 0;
        }
        .footer-bottom-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
            font-size: 13px;
            color: var(--text-low);
        }

        /* ===== 响应式断点 ===== */
        @media (max-width: 1023px) {
            .section {
                padding: 56px 0;
            }
            .header-brand-row {
                border-bottom: none;
            }
            .header-channel-row {
                display: none;
            }
            .hamburger {
                display: flex;
            }
            .hero-inner {
                flex-direction: column;
                gap: 40px;
                text-align: center;
                padding-top: 20px;
            }
            .hero-content {
                display: flex;
                flex-direction: column;
                align-items: center;
            }
            .hero-points {
                justify-content: center;
            }
            .hero-visual {
                width: 100%;
                max-width: 560px;
            }
            .hero-actions {
                justify-content: center;
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .step-connector {
                display: none;
            }
            .cases-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
        }
        @media (max-width: 767px) {
            .wrap {
                padding: 0 16px;
            }
            .section {
                padding: 48px 0;
            }
            .section-head {
                margin-bottom: 32px;
            }
            .trust-bar {
                grid-template-columns: repeat(2, 1fr);
            }
            .trust-item:nth-child(2)::after {
                display: none;
            }
            .trust-item {
                padding: 20px 12px;
            }
            .trust-num {
                font-size: 24px;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .cases-grid {
                grid-template-columns: 1fr;
            }
            .news-row {
                flex-wrap: wrap;
                gap: 10px;
            }
            .news-title {
                flex-basis: 100%;
                white-space: normal;
                overflow: visible;
                text-overflow: unset;
            }
            .news-date {
                margin-left: auto;
            }
            .cta-form input {
                width: 100%;
            }
            .cta-form .btn {
                width: 100%;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom-inner {
                flex-direction: column;
                text-align: center;
            }
            .hero {
                padding-top: 60px;
            }
            .hero-title {
                font-size: 34px;
            }
            .mobile-menu {
                display: block;
            }
            .mobile-menu-backdrop {
                display: none;
            }
            .mobile-menu-backdrop.show {
                display: block;
            }
        }

/* roulang page: article */
:root {
            --bg-base: #070E1A;
            --bg-panel: #0C1526;
            --bg-deep: #050B14;
            --bg-glass: rgba(255, 255, 255, 0.05);
            --bg-glass-hover: rgba(255, 255, 255, 0.09);
            --border-glass: rgba(255, 255, 255, 0.10);
            --border-glass-strong: rgba(255, 255, 255, 0.2);
            --primary: #3B82F6;
            --primary-light: #60A5FA;
            --cyan-glow: #22D3EE;
            --green-accent: #4ADE80;
            --text-high: #F2F6FC;
            --text-mid: #B0BED0;
            --text-low: #6B7A90;
            --radius-card: 16px;
            --radius-btn: 10px;
            --radius-tag: 999px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.35);
            --shadow-card-hover: 0 14px 40px rgba(0, 0, 0, 0.45);
            --glow-primary: 0 0 30px rgba(59, 130, 246, 0.35);
            --glow-cyan: 0 0 24px rgba(34, 211, 238, 0.3);
            --glow-green: 0 0 20px rgba(74, 222, 128, 0.25);
            --header-h: 64px;
            --channel-h: 46px;
            --max-w: 1200px;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            background: var(--bg-base);
            color: var(--text-high);
            line-height: 1.7;
            font-size: 15px;
            overflow-x: hidden;
        }
        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: color 0.25s ease;
        }
        a:hover {
            color: var(--cyan-glow);
        }
        img {
            max-width: 100%;
            display: block;
        }
        button {
            font-family: inherit;
            border: none;
            cursor: pointer;
            background: none;
        }
        input {
            font-family: inherit;
        }
        .container,
        .wrap {
            max-width: var(--max-w);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container,
            .wrap {
                padding: 0 16px;
            }
        }

        /* ========== 按钮 ========== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 15px;
            font-weight: 600;
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            transition: all 0.28s ease;
            line-height: 1.2;
            border: 1px solid transparent;
            white-space: nowrap;
        }
        .btn-primary {
            background: linear-gradient(135deg, #3B82F6, #22D3EE);
            color: #fff;
            box-shadow: var(--glow-primary);
        }
        .btn-primary:hover {
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 0 40px rgba(34, 211, 238, 0.5);
            filter: brightness(1.08);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: var(--glow-primary);
            filter: brightness(0.96);
        }
        .btn-outline {
            background: transparent;
            border-color: var(--border-glass-strong);
            color: var(--text-high);
        }
        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.06);
            border-color: var(--cyan-glow);
            color: var(--cyan-glow);
        }
        .btn-sm {
            padding: 8px 18px;
            font-size: 14px;
            border-radius: 8px;
        }
        .btn-lg {
            padding: 15px 36px;
            font-size: 16px;
            border-radius: 12px;
        }
        .btn:focus-visible {
            outline: 3px solid rgba(34, 211, 238, 0.6);
            outline-offset: 3px;
        }

        /* ========== 导航 ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: transparent;
            transition: background 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
            border-bottom: 1px solid transparent;
        }
        .site-header.header-scrolled {
            background: rgba(7, 14, 26, 0.88);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
        }
        .header-brand-row {
            height: var(--header-h);
            display: flex;
            align-items: center;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }
        .header-brand-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }
        .logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 800;
            color: var(--text-high);
            letter-spacing: -0.02em;
        }
        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: linear-gradient(135deg, #3B82F6, #22D3EE);
            box-shadow: var(--glow-primary);
            flex-shrink: 0;
        }
        .logo-text {
            background: linear-gradient(135deg, #60A5FA, #22D3EE);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 14px;
        }
        .hamburger {
            display: none;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 10px;
            border: 1px solid var(--border-glass);
            transition: background 0.2s;
        }
        .hamburger:hover {
            background: rgba(255, 255, 255, 0.06);
        }
        .header-channel-row {
            height: var(--channel-h);
            display: flex;
            align-items: center;
        }
        .channel-nav {
            display: flex;
            align-items: center;
            gap: 6px;
            width: 100%;
            overflow-x: auto;
            scrollbar-width: none;
        }
        .channel-nav::-webkit-scrollbar {
            display: none;
        }
        .channel-link {
            display: inline-flex;
            align-items: center;
            padding: 7px 16px;
            border-radius: var(--radius-tag);
            font-size: 14px;
            font-weight: 500;
            color: var(--text-mid);
            border: 1px solid transparent;
            flex-shrink: 0;
            transition: all 0.22s ease;
        }
        .channel-link:hover {
            color: var(--text-high);
            background: rgba(255, 255, 255, 0.04);
            border-color: var(--border-glass);
        }
        .channel-link.active {
            color: var(--cyan-glow);
            background: rgba(34, 211, 238, 0.15);
            border-color: rgba(34, 211, 238, 0.25);
        }
        .mobile-menu {
            display: none;
            position: fixed;
            top: 56px;
            left: 0;
            right: 0;
            z-index: 49;
            background: rgba(7, 14, 26, 0.97);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-glass);
            padding: 12px 16px 20px;
        }
        .mobile-menu.open {
            display: block;
        }
        .mobile-menu a {
            display: block;
            padding: 13px 18px;
            border-radius: 10px;
            color: var(--text-mid);
            font-size: 15px;
            font-weight: 500;
            border: 1px solid transparent;
        }
        .mobile-menu a:hover,
        .mobile-menu a.active {
            color: var(--cyan-glow);
            background: rgba(34, 211, 238, 0.12);
            border-color: rgba(34, 211, 238, 0.25);
        }
        @media (max-width: 768px) {
            .site-header {
                position: sticky;
            }
            .header-brand-row {
                height: 56px;
            }
            .header-channel-row {
                display: none;
            }
            .hamburger {
                display: inline-flex;
            }
            .header-actions .btn {
                display: none;
            }
            .logo {
                font-size: 18px;
            }
        }

        /* ========== 文章页 Hero ========== */
        .article-hero {
            position: relative;
            padding: 64px 0 60px;
            background:
                radial-gradient(ellipse at 18% 0%, rgba(59, 130, 246, 0.28), transparent 55%),
                radial-gradient(ellipse at 90% 20%, rgba(34, 211, 238, 0.16), transparent 50%),
                linear-gradient(rgba(5, 11, 20, 0.80), rgba(5, 11, 20, 0.88)),
                url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }
        .article-hero .wrap {
            position: relative;
            z-index: 2;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 14px;
            color: var(--text-low);
            margin-bottom: 32px;
        }
        .breadcrumb a {
            color: var(--text-mid);
            transition: color 0.2s;
        }
        .breadcrumb a:hover {
            color: var(--cyan-glow);
        }
        .breadcrumb .sep {
            color: var(--text-low);
            opacity: 0.7;
        }
        .breadcrumb .current {
            color: var(--text-mid);
            max-width: 420px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }
        .article-title {
            font-size: clamp(30px, 4.4vw, 46px);
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: -0.02em;
            margin: 0 0 24px;
            max-width: 880px;
            color: var(--text-high);
        }
        .article-meta {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 14px;
            color: var(--text-low);
        }
        .meta-item {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .meta-item svg {
            width: 15px;
            height: 15px;
            opacity: 0.8;
        }
        .meta-category {
            display: inline-flex;
            align-items: center;
            padding: 5px 14px;
            border-radius: var(--radius-tag);
            background: rgba(34, 211, 238, 0.14);
            border: 1px solid rgba(34, 211, 238, 0.25);
            color: var(--cyan-glow);
            font-size: 13px;
            font-weight: 600;
        }
        .meta-source {
            color: var(--text-mid);
        }

        /* ========== 正文区 ========== */
        .article-section {
            padding: 56px 0 40px;
            position: relative;
        }
        .article-section::before {
            content: "";
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 50% 0%, rgba(34, 211, 238, 0.08), transparent 45%);
            pointer-events: none;
        }
        .article-main {
            max-width: 860px;
            margin: 0 auto;
            position: relative;
            z-index: 2;
        }
        .card-glass {
            background: linear-gradient(180deg, rgba(255, 255, 255, 0.055), rgba(255, 255, 255, 0.03));
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            position: relative;
        }
        .card-glass::before {
            content: "";
            position: absolute;
            top: 0;
            left: 10%;
            right: 10%;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.28), transparent);
            border-radius: 50%;
        }
        .article-body {
            padding: 44px 48px;
            font-size: 16px;
            line-height: 1.9;
            color: var(--text-mid);
            word-break: break-word;
        }
        .article-body h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--text-high);
            margin: 48px 0 18px;
            line-height: 1.4;
            letter-spacing: -0.01em;
            position: relative;
            padding-left: 16px;
        }
        .article-body h2::before {
            content: "";
            position: absolute;
            left: 0;
            top: 6px;
            bottom: 6px;
            width: 4px;
            border-radius: 4px;
            background: linear-gradient(180deg, #3B82F6, #22D3EE);
            box-shadow: var(--glow-cyan);
        }
        .article-body h3 {
            font-size: 21px;
            font-weight: 700;
            color: var(--text-high);
            margin: 36px 0 14px;
            line-height: 1.4;
        }
        .article-body p {
            margin: 16px 0;
        }
        .article-body a {
            color: var(--cyan-glow);
            border-bottom: 1px solid rgba(34, 211, 238, 0.4);
            transition: border-color 0.2s;
        }
        .article-body a:hover {
            border-color: var(--cyan-glow);
            color: var(--primary-light);
        }
        .article-body ul,
        .article-body ol {
            margin: 18px 0;
            padding-left: 26px;
        }
        .article-body li {
            margin: 8px 0;
        }
        .article-body blockquote {
            border-left: 4px solid var(--cyan-glow);
            background: rgba(34, 211, 238, 0.06);
            padding: 18px 22px;
            border-radius: 0 12px 12px 0;
            font-style: italic;
            color: var(--text-mid);
            margin: 24px 0;
        }
        .article-body pre {
            background: var(--bg-deep);
            border: 1px solid var(--border-glass);
            border-radius: 10px;
            padding: 18px 20px;
            overflow-x: auto;
            font-size: 14px;
            line-height: 1.7;
            color: var(--text-high);
            margin: 22px 0;
        }
        .article-body code {
            font-family: "JetBrains Mono", "Fira Code", Consolas, monospace;
            background: rgba(255, 255, 255, 0.08);
            padding: 2px 6px;
            border-radius: 5px;
            font-size: 0.92em;
            color: var(--cyan-glow);
        }
        .article-body pre code {
            background: none;
            padding: 0;
            color: inherit;
        }
        .article-body img {
            border-radius: 12px;
            margin: 24px auto;
            box-shadow: 0 6px 24px rgba(0, 0, 0, 0.35);
        }
        .article-body table {
            width: 100%;
            border-collapse: collapse;
            margin: 24px 0;
            font-size: 14px;
        }
        .article-body table th {
            background: rgba(255, 255, 255, 0.06);
            color: var(--text-high);
            font-weight: 600;
            padding: 12px 14px;
            border: 1px solid var(--border-glass);
        }
        .article-body table td {
            padding: 12px 14px;
            border: 1px solid rgba(255, 255, 255, 0.07);
            color: var(--text-mid);
        }
        .article-body table tr:hover td {
            background: rgba(255, 255, 255, 0.025);
        }
        .article-body hr {
            border: none;
            border-top: 1px solid var(--border-glass);
            margin: 36px 0;
        }
        .not-found {
            text-align: center;
            padding: 90px 30px;
            color: var(--text-low);
        }
        .not-found p {
            font-size: 26px;
            font-weight: 600;
            color: var(--text-mid);
            margin-bottom: 22px;
        }
        @media (max-width: 768px) {
            .article-body {
                padding: 30px 22px;
            }
            .article-body h2 {
                font-size: 22px;
                padding-left: 12px;
            }
            .article-body h3 {
                font-size: 19px;
            }
        }

        /* ========== 标签与上一篇/下一篇 ========== */
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin: 26px 0 10px;
            max-width: 860px;
            margin-left: auto;
            margin-right: auto;
        }
        .tag-pill {
            display: inline-flex;
            align-items: center;
            padding: 6px 16px;
            border-radius: var(--radius-tag);
            background: rgba(59, 130, 246, 0.1);
            border: 1px solid rgba(59, 130, 246, 0.22);
            color: var(--primary-light);
            font-size: 13px;
            font-weight: 500;
            transition: all 0.2s;
        }
        .tag-pill:hover {
            background: rgba(34, 211, 238, 0.14);
            border-color: rgba(34, 211, 238, 0.35);
            color: var(--cyan-glow);
        }
        .article-pagination {
            display: flex;
            justify-content: space-between;
            gap: 16px;
            margin: 26px 0 0;
            max-width: 860px;
            margin-left: auto;
            margin-right: auto;
        }
        .pagination-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 12px 22px;
            border-radius: var(--radius-btn);
            background: var(--bg-glass);
            border: 1px solid var(--border-glass);
            color: var(--text-mid);
            font-size: 14px;
            font-weight: 500;
            transition: all 0.22s;
            max-width: 48%;
        }
        .pagination-link:hover {
            background: var(--bg-glass-hover);
            border-color: var(--border-glass-strong);
            color: var(--cyan-glow);
        }
        .pagination-link .arrow {
            font-size: 18px;
            line-height: 1;
        }
        @media (max-width: 640px) {
            .article-pagination {
                flex-direction: column;
            }
            .pagination-link {
                max-width: 100%;
            }
        }

        /* ========== 相关推荐 ========== */
        .related-section {
            padding: 64px 0 56px;
            position: relative;
        }
        .related-section::before {
            content: "";
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 80% 30%, rgba(59, 130, 246, 0.1), transparent 50%);
            pointer-events: none;
        }
        .section-head {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 36px;
            position: relative;
            z-index: 2;
        }
        .section-title {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            font-size: clamp(24px, 3vw, 32px);
            font-weight: 700;
            color: var(--text-high);
            letter-spacing: -0.01em;
        }
        .section-title::before {
            content: "";
            width: 4px;
            height: 26px;
            border-radius: 4px;
            background: linear-gradient(180deg, #3B82F6, #22D3EE);
            box-shadow: var(--glow-cyan);
        }
        .section-more {
            font-size: 14px;
            color: var(--text-mid);
            font-weight: 500;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: color 0.2s;
        }
        .section-more:hover {
            color: var(--cyan-glow);
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, minmax(0, 1fr));
            gap: 24px;
            position: relative;
            z-index: 2;
        }
        .related-card {
            display: flex;
            flex-direction: column;
            border-radius: var(--radius-card);
            overflow: hidden;
            background: linear-gradient(180deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.025));
            border: 1px solid var(--border-glass);
            box-shadow: var(--shadow-card);
            transition: transform 0.28s ease, box-shadow 0.28s ease, border-color 0.28s ease;
            position: relative;
        }
        .related-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 10%;
            right: 10%;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.25), transparent);
            z-index: 2;
        }
        .related-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-card-hover);
            border-color: var(--border-glass-strong);
        }
        .related-cover {
            overflow: hidden;
            aspect-ratio: 16 / 9;
            position: relative;
        }
        .related-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.45s ease;
        }
        .related-card:hover .related-cover img {
            transform: scale(1.05);
        }
        .related-info {
            padding: 20px 22px 22px;
            display: flex;
            flex-direction: column;
            gap: 10px;
            flex: 1;
        }
        .related-badge {
            display: inline-flex;
            align-self: flex-start;
            padding: 4px 12px;
            border-radius: var(--radius-tag);
            background: rgba(34, 211, 238, 0.14);
            border: 1px solid rgba(34, 211, 238, 0.22);
            color: var(--cyan-glow);
            font-size: 12px;
            font-weight: 600;
        }
        .related-info h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-high);
            line-height: 1.5;
            margin: 0;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            transition: color 0.2s;
        }
        .related-card:hover .related-info h3 {
            color: var(--cyan-glow);
        }
        .related-date {
            font-size: 13px;
            color: var(--text-low);
            margin-top: auto;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        @media (max-width: 1023px) {
            .related-grid {
                grid-template-columns: repeat(2, minmax(0, 1fr));
            }
        }
        @media (max-width: 640px) {
            .related-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ========== 返回入口 ========== */
        .back-cta {
            padding: 32px 0 70px;
            text-align: center;
            position: relative;
        }
        .back-cta .back-inner {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        /* ========== 页脚 ========== */
        .site-footer {
            background: var(--bg-deep);
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            position: relative;
        }
        .site-footer::before {
            content: "";
            position: absolute;
            top: -1px;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(34, 211, 238, 0.4), transparent);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(4, minmax(0, 1fr));
            gap: 40px;
            padding: 64px 0 48px;
        }
        .footer-col {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-high);
            margin-bottom: 8px;
            letter-spacing: 0.02em;
        }
        .footer-col a {
            font-size: 14px;
            color: var(--text-mid);
            transition: color 0.22s;
            line-height: 1.5;
        }
        .footer-col a:hover {
            color: var(--cyan-glow);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding: 20px 0;
        }
        .footer-bottom-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 13px;
            color: var(--text-low);
        }
        .footer-bottom-inner span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: repeat(2, minmax(0, 1fr));
                gap: 32px 24px;
                padding: 48px 0 32px;
            }
        }
        @media (max-width: 480px) {
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .footer-bottom-inner {
                flex-direction: column;
                text-align: center;
                gap: 4px;
            }
        }

        /* ========== 焦点与通用 ========== */
        :focus-visible {
            outline: 3px solid rgba(34, 211, 238, 0.5);
            outline-offset: 2px;
        }
        ::selection {
            background: rgba(34, 211, 238, 0.35);
            color: #fff;
        }
        .article-hero-grid {
            position: absolute;
            inset: 0;
            background-image:
                linear-gradient(rgba(59, 130, 246, 0.05) 1px, transparent 1px),
                linear-gradient(90deg, rgba(59, 130, 246, 0.05) 1px, transparent 1px);
            background-size: 48px 48px;
            pointer-events: none;
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --bg-base: #070E1A;
            --bg-panel: #0C1526;
            --bg-deep: #050B14;
            --bg-glass: rgba(255, 255, 255, 0.05);
            --bg-glass-hover: rgba(255, 255, 255, 0.09);
            --border-glass: rgba(255, 255, 255, 0.10);
            --border-glass-strong: rgba(255, 255, 255, 0.2);
            --primary: #3B82F6;
            --primary-light: #60A5FA;
            --cyan-glow: #22D3EE;
            --green-accent: #4ADE80;
            --text-high: #F2F6FC;
            --text-mid: #B0BED0;
            --text-low: #6B7A90;
            --radius-card: 16px;
            --radius-btn: 10px;
            --radius-tag: 999px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.35);
            --shadow-card-hover: 0 14px 40px rgba(0, 0, 0, 0.45);
            --glow-primary: 0 0 30px rgba(59, 130, 246, 0.35);
            --glow-cyan: 0 0 24px rgba(34, 211, 238, 0.3);
            --glow-green: 0 0 20px rgba(74, 222, 128, 0.25);
            --header-h: 64px;
            --channel-h: 46px;
            --max-w: 1200px;
        }

        /* ===== 基础 reset ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            background: var(--bg-base);
            color: var(--text-high);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            font-size: 15px;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        button {
            font-family: inherit;
            border: none;
            background: none;
            cursor: pointer;
        }
        input {
            font-family: inherit;
            outline: none;
        }

        .wrap {
            max-width: var(--max-w);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== 滚动显现 ===== */
        .js .fade-up {
            opacity: 0;
            transform: translateY(24px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }
        .js .fade-up.visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* ===== Header 导航 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(7, 14, 26, 0.85);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-glass);
        }
        .header-brand-row {
            height: var(--header-h);
        }
        .header-brand-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo-icon {
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, var(--primary), var(--cyan-glow));
            border-radius: 10px;
            box-shadow: var(--glow-primary);
            flex-shrink: 0;
        }
        .logo-text {
            font-size: 20px;
            font-weight: 800;
            letter-spacing: -0.02em;
            background: linear-gradient(135deg, var(--primary-light), var(--cyan-glow));
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            white-space: nowrap;
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .hamburger {
            display: none;
            width: 40px;
            height: 40px;
            background: var(--bg-glass);
            border: 1px solid var(--border-glass);
            border-radius: 10px;
            align-items: center;
            justify-content: center;
            transition: all 0.3s ease;
        }
        .hamburger:hover {
            border-color: var(--border-glass-strong);
            background: var(--bg-glass-hover);
        }
        .header-channel-row {
            height: var(--channel-h);
            border-top: 1px solid rgba(255, 255, 255, 0.04);
        }
        .channel-nav {
            display: flex;
            align-items: center;
            gap: 8px;
            height: 100%;
            overflow-x: auto;
            scrollbar-width: none;
        }
        .channel-nav::-webkit-scrollbar {
            display: none;
        }
        .channel-link {
            display: inline-flex;
            align-items: center;
            padding: 6px 18px;
            border-radius: var(--radius-tag);
            font-size: 14px;
            color: var(--text-mid);
            white-space: nowrap;
            border: 1px solid transparent;
            transition: all 0.3s ease;
            position: relative;
        }
        .channel-link:hover {
            color: var(--text-high);
            background: rgba(255, 255, 255, 0.06);
        }
        .channel-link.active {
            color: var(--cyan-glow);
            background: rgba(34, 211, 238, 0.15);
            border-color: rgba(34, 211, 238, 0.3);
        }
        .channel-link.active::after {
            content: "";
            position: absolute;
            bottom: -1px;
            left: 50%;
            transform: translateX(-50%);
            width: 24px;
            height: 2px;
            background: var(--cyan-glow);
            border-radius: 2px;
        }

        /* 移动端菜单 */
        .mobile-menu {
            display: none;
            background: var(--bg-panel);
            border-top: 1px solid var(--border-glass);
            padding: 12px 24px 20px;
        }
        .mobile-menu.open {
            display: block;
        }
        .mobile-menu a {
            display: block;
            padding: 12px 16px;
            border-radius: 10px;
            font-size: 15px;
            color: var(--text-mid);
            transition: all 0.3s ease;
        }
        .mobile-menu a:hover,
        .mobile-menu a.active {
            color: var(--cyan-glow);
            background: rgba(34, 211, 238, 0.1);
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 600;
            transition: all 0.3s ease;
            border: 1px solid transparent;
            line-height: 1.2;
            position: relative;
            overflow: hidden;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--cyan-glow));
            color: #fff;
            box-shadow: var(--glow-primary);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 40px rgba(34, 211, 238, 0.5);
            filter: brightness(1.1);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: var(--glow-primary);
            filter: brightness(0.95);
        }
        .btn-primary:focus-visible,
        .btn-secondary:focus-visible {
            outline: 2px solid var(--cyan-glow);
            outline-offset: 3px;
        }
        .btn-secondary {
            background: transparent;
            border-color: var(--border-glass-strong);
            color: var(--text-high);
        }
        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.06);
            border-color: var(--cyan-glow);
            color: var(--cyan-glow);
        }
        .btn-secondary:active {
            background: rgba(255, 255, 255, 0.02);
        }
        .btn-sm {
            padding: 8px 18px;
            font-size: 13px;
        }
        .btn-lg {
            padding: 14px 32px;
            font-size: 16px;
            border-radius: 12px;
        }

        /* ===== 玻璃卡片 ===== */
        .glass-card {
            background: var(--bg-glass);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            position: relative;
            transition: all 0.3s ease;
        }
        .glass-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 24px;
            right: 24px;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.25), transparent);
            pointer-events: none;
        }
        .glass-card:hover {
            transform: translateY(-4px);
            background: var(--bg-glass-hover);
            border-color: var(--border-glass-strong);
            box-shadow: var(--shadow-card-hover);
        }

        /* ===== 区块标题 ===== */
        .section-title {
            font-size: clamp(24px, 3vw, 34px);
            font-weight: 700;
            line-height: 1.3;
            letter-spacing: -0.02em;
            padding-left: 16px;
            position: relative;
            margin-bottom: 12px;
        }
        .section-title::before {
            content: "";
            position: absolute;
            left: 0;
            top: 4px;
            bottom: 4px;
            width: 4px;
            border-radius: 4px;
            background: linear-gradient(180deg, var(--primary), var(--cyan-glow));
        }
        .section-sub {
            font-size: 15px;
            color: var(--text-mid);
            line-height: 1.7;
        }

        /* ===== 标签 ===== */
        .badge-tag {
            display: inline-flex;
            align-items: center;
            padding: 5px 14px;
            border-radius: var(--radius-tag);
            font-size: 12px;
            font-weight: 500;
            background: rgba(34, 211, 238, 0.15);
            color: var(--cyan-glow);
            border: 1px solid rgba(34, 211, 238, 0.25);
            letter-spacing: 0.02em;
        }
        .badge-green {
            background: rgba(74, 222, 128, 0.15);
            color: var(--green-accent);
            border-color: rgba(74, 222, 128, 0.25);
        }

        /* ===== 数据块 ===== */
        .stat-number {
            font-family: "Inter", "DIN Alternate", "Roboto", sans-serif;
            font-size: 30px;
            font-weight: 800;
            color: var(--green-accent);
            line-height: 1.2;
            text-shadow: var(--glow-green);
        }
        .stat-label {
            font-size: 13px;
            color: var(--text-mid);
        }

        /* ===== Hero ===== */
        .page-hero {
            position: relative;
            padding: 80px 0 0;
            background: var(--bg-base);
            overflow: hidden;
        }
        .page-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background:
                radial-gradient(ellipse at 15% 10%, rgba(59, 130, 246, 0.28), transparent 50%),
                radial-gradient(ellipse at 85% 70%, rgba(34, 211, 238, 0.14), transparent 55%);
            pointer-events: none;
        }
        .hero-backdrop {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            opacity: 0.22;
        }
        .hero-backdrop::after {
            content: "";
            position: absolute;
            inset: 0;
            background:
                linear-gradient(90deg, var(--bg-base) 0%, rgba(7, 14, 26, 0.85) 45%, rgba(7, 14, 26, 0.6) 100%),
                linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
            background-size: 100% 100%, 40px 40px, 40px 40px;
        }
        .hero-title {
            font-size: clamp(38px, 5vw, 54px);
            font-weight: 800;
            line-height: 1.16;
            letter-spacing: -0.02em;
            margin-bottom: 20px;
        }
        .text-gradient {
            background: linear-gradient(135deg, var(--primary-light), var(--cyan-glow));
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .hero-sub {
            font-size: 17px;
            font-weight: 600;
            color: var(--text-high);
            margin-bottom: 14px;
        }
        .hero-desc {
            font-size: 15px;
            color: var(--text-mid);
            line-height: 1.8;
            max-width: 480px;
        }
        .hero-visual {
            position: relative;
        }
        .hero-img-wrap {
            position: relative;
            border-radius: var(--radius-card);
            overflow: hidden;
            border: 1px solid var(--border-glass);
            box-shadow: var(--shadow-card);
        }
        .hero-img-wrap img {
            width: 100%;
            height: 420px;
            object-fit: cover;
        }
        .hero-img-wrap::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 55%, rgba(7, 14, 26, 0.4) 100%);
            pointer-events: none;
        }
        .hero-img-glow {
            position: absolute;
            bottom: -40px;
            left: 50%;
            transform: translateX(-50%);
            width: 80%;
            height: 80px;
            background: radial-gradient(ellipse, rgba(34, 211, 238, 0.35), transparent 70%);
            filter: blur(20px);
            pointer-events: none;
        }
        .hero-stats {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-card);
            overflow: hidden;
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            margin-top: 64px;
            position: relative;
            z-index: 5;
            background: rgba(12, 21, 38, 0.7);
            box-shadow: var(--shadow-card);
        }
        .stat-item {
            padding: 24px 20px;
            text-align: center;
            display: flex;
            flex-direction: column;
            gap: 6px;
        }
        .stat-item + .stat-item {
            border-left: 1px solid var(--border-glass);
        }

        /* ===== 覆盖范围 ===== */
        .section-glow {
            position: relative;
            background: radial-gradient(ellipse at 20% 0%, rgba(59, 130, 246, 0.18), transparent 50%);
        }
        .section-glow::before {
            content: "";
            position: absolute;
            inset: 0;
            background-image: linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
            background-size: 40px 40px;
            pointer-events: none;
        }
        .section-glow .wrap {
            position: relative;
            z-index: 2;
        }
        .feature-icon {
            width: 56px;
            height: 56px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, rgba(59, 130, 246, 0.25), rgba(34, 211, 238, 0.2));
            border-radius: 14px;
            color: var(--cyan-glow);
            border: 1px solid rgba(34, 211, 238, 0.25);
            margin-bottom: 20px;
            flex-shrink: 0;
        }
        .feature-card h3 {
            font-size: 19px;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--text-high);
        }
        .feature-card p {
            font-size: 14px;
            color: var(--text-mid);
            line-height: 1.8;
            margin-bottom: 16px;
        }

        /* ===== 专题卡片 ===== */
        .topic-card {
            border-radius: var(--radius-card);
            overflow: hidden;
            border: 1px solid var(--border-glass);
            background: var(--bg-panel);
            transition: all 0.3s ease;
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .topic-card:hover {
            transform: translateY(-4px);
            border-color: var(--border-glass-strong);
            box-shadow: var(--shadow-card-hover);
        }
        .topic-card-img {
            height: 200px;
            background-size: cover;
            background-position: center;
            position: relative;
            flex-shrink: 0;
        }
        .topic-card-img::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 35%, rgba(7, 14, 26, 0.88) 100%);
        }
        .topic-card-body {
            padding: 20px 22px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .topic-card-body h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-high);
            margin-bottom: 8px;
        }
        .topic-card-body p {
            font-size: 14px;
            color: var(--text-mid);
            line-height: 1.7;
            flex: 1;
        }
        .topic-card-tag {
            margin-top: 14px;
        }

        /* ===== 流程 ===== */
        .process-steps {
            display: grid;
            grid-template-columns: 1fr auto 1fr auto 1fr;
            align-items: center;
            gap: 24px;
            margin-top: 48px;
        }
        .process-step {
            background: var(--bg-glass);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-card);
            padding: 32px 24px;
            text-align: center;
            position: relative;
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            box-shadow: var(--shadow-card);
            transition: all 0.3s ease;
        }
        .process-step:hover {
            transform: translateY(-4px);
            border-color: var(--border-glass-strong);
            background: var(--bg-glass-hover);
        }
        .step-num {
            font-size: 44px;
            font-weight: 800;
            background: linear-gradient(135deg, rgba(59, 130, 246, 0.8), rgba(34, 211, 238, 0.6));
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            line-height: 1.2;
            display: block;
            margin-bottom: 16px;
        }
        .process-step h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-high);
            margin-bottom: 10px;
        }
        .process-step p {
            font-size: 14px;
            color: var(--text-mid);
            line-height: 1.7;
        }
        .step-arrow {
            color: var(--cyan-glow);
            font-size: 28px;
            font-weight: 700;
            opacity: 0.5;
            text-align: center;
            user-select: none;
        }

        /* ===== 服务保障 ===== */
        .assure-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 48px;
        }
        .assure-item {
            padding: 28px 24px;
            text-align: center;
        }
        .assure-icon {
            width: 48px;
            height: 48px;
            margin: 0 auto 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 12px;
            background: rgba(34, 211, 238, 0.12);
            border: 1px solid rgba(34, 211, 238, 0.2);
            color: var(--cyan-glow);
        }
        .assure-item h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-high);
            margin-bottom: 8px;
        }
        .assure-item p {
            font-size: 13px;
            color: var(--text-mid);
            line-height: 1.7;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 48px auto 0;
        }
        .faq-item {
            border: 1px solid var(--border-glass);
            border-radius: 12px;
            margin-bottom: 12px;
            background: var(--bg-glass);
            overflow: hidden;
            transition: border-color 0.3s ease, background 0.3s ease;
        }
        .faq-item.active {
            border-color: rgba(34, 211, 238, 0.4);
            background: rgba(34, 211, 238, 0.04);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 20px;
            background: transparent;
            color: var(--text-high);
            font-size: 15px;
            font-weight: 600;
            text-align: left;
            transition: color 0.3s ease;
        }
        .faq-question:hover {
            color: var(--cyan-glow);
        }
        .faq-icon {
            width: 22px;
            height: 22px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-mid);
            transition: transform 0.3s ease, color 0.3s ease;
            flex-shrink: 0;
            margin-left: 12px;
        }
        .faq-item.active .faq-icon {
            transform: rotate(45deg);
            color: var(--cyan-glow);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease;
            padding: 0 20px;
            font-size: 14px;
            color: var(--text-mid);
            line-height: 1.7;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding-bottom: 18px;
        }

        /* ===== CTA 表单 ===== */
        .cta-section {
            position: relative;
            background: linear-gradient(135deg, #0C1526, #1A2744);
            overflow: hidden;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
        }
        .cta-section::before {
            content: "";
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 50% 120%, rgba(34, 211, 238, 0.2), transparent 60%);
            background-image:
                radial-gradient(ellipse at 50% 120%, rgba(34, 211, 238, 0.2), transparent 60%),
                linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
            background-size: 100% 100%, 40px 40px, 40px 40px;
            pointer-events: none;
        }
        .cta-inner {
            position: relative;
            z-index: 2;
            text-align: center;
            padding: 90px 24px;
        }
        .cta-inner h2 {
            font-size: clamp(26px, 3.5vw, 40px);
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 14px;
        }
        .cta-inner > p {
            font-size: 15px;
            color: var(--text-mid);
            margin-bottom: 36px;
        }
        .cta-form {
            display: flex;
            gap: 12px;
            max-width: 520px;
            margin: 0 auto;
        }
        .input-field {
            height: 50px;
            padding: 0 18px;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--border-glass);
            border-radius: 10px;
            color: var(--text-high);
            font-size: 15px;
            width: 100%;
            transition: all 0.3s ease;
            flex: 1;
        }
        .input-field::placeholder {
            color: var(--text-low);
        }
        .input-field:focus {
            border-color: var(--cyan-glow);
            box-shadow: var(--glow-cyan);
        }
        .input-field:focus-visible {
            outline: 2px solid rgba(34, 211, 238, 0.4);
            outline-offset: 1px;
        }
        .cta-form .btn {
            flex-shrink: 0;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-deep);
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 40px;
            padding: 64px 0 48px;
        }
        .footer-col h4 {
            font-size: 14px;
            font-weight: 700;
            color: var(--text-high);
            margin-bottom: 18px;
            letter-spacing: 0.02em;
        }
        .footer-col a {
            display: block;
            font-size: 14px;
            color: var(--text-mid);
            margin-bottom: 11px;
            transition: color 0.3s ease;
        }
        .footer-col a:hover {
            color: var(--cyan-glow);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            padding: 20px 0;
        }
        .footer-bottom-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 13px;
            color: var(--text-low);
            gap: 16px;
            flex-wrap: wrap;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .assure-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .hero-img-wrap img {
                height: 360px;
            }
        }
        @media (max-width: 768px) {
            .wrap {
                padding: 0 16px;
            }
            .header-brand-row {
                height: 56px;
            }
            .logo-text {
                font-size: 17px;
            }
            .logo-icon {
                width: 32px;
                height: 32px;
            }
            .header-actions .btn-primary {
                display: none;
            }
            .hamburger {
                display: flex;
            }
            .header-channel-row {
                display: none;
            }
            .page-hero {
                padding-top: 56px;
            }
            .hero-stats {
                grid-template-columns: repeat(2, 1fr);
                margin-top: 48px;
            }
            .stat-item:nth-child(3) {
                border-left: none;
                border-top: 1px solid var(--border-glass);
            }
            .stat-item:nth-child(4) {
                border-top: 1px solid var(--border-glass);
            }
            .stat-number {
                font-size: 24px;
            }
            .process-steps {
                grid-template-columns: 1fr;
                gap: 16px;
                margin-top: 36px;
            }
            .step-arrow {
                transform: rotate(90deg);
                font-size: 22px;
                line-height: 1;
            }
            .cta-form {
                flex-direction: column;
            }
            .cta-form .btn {
                width: 100%;
            }
            .assure-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
                padding: 48px 0 32px;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .hero-title {
                font-size: 34px;
            }
            .hero-desc {
                font-size: 14px;
            }
            .btn-lg {
                width: 100%;
            }
            .hero-cta {
                width: 100%;
            }
            .hero-cta .btn {
                flex: 1;
                justify-content: center;
            }
            .footer-bottom-inner {
                flex-direction: column;
                text-align: center;
                gap: 8px;
            }
        }

/* roulang page: category2 */
:root {
            --bg-base: #070E1A;
            --bg-panel: #0C1526;
            --bg-deep: #050B14;
            --bg-glass: rgba(255, 255, 255, 0.05);
            --bg-glass-hover: rgba(255, 255, 255, 0.09);
            --border-glass: rgba(255, 255, 255, 0.10);
            --border-glass-strong: rgba(255, 255, 255, 0.2);
            --primary: #3B82F6;
            --primary-light: #60A5FA;
            --cyan-glow: #22D3EE;
            --green-accent: #4ADE80;
            --text-high: #F2F6FC;
            --text-mid: #B0BED0;
            --text-low: #6B7A90;
            --radius-card: 16px;
            --radius-btn: 10px;
            --radius-tag: 999px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.35);
            --shadow-card-hover: 0 14px 40px rgba(0, 0, 0, 0.45);
            --glow-primary: 0 0 30px rgba(59, 130, 246, 0.35);
            --glow-cyan: 0 0 24px rgba(34, 211, 238, 0.3);
            --glow-green: 0 0 20px rgba(74, 222, 128, 0.25);
            --header-h: 64px;
            --channel-h: 46px;
            --max-w: 1200px;
        }
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background-color: var(--bg-base);
            background-image: radial-gradient(ellipse at 20% 0%, rgba(59, 130, 246, 0.18), transparent 50%);
            color: var(--text-high);
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            font-size: 16px;
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: all .3s ease;
        }
        img {
            max-width: 100%;
            display: block;
        }
        .wrap {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(7, 14, 26, 0.7);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .header-brand-row {
            height: var(--header-h);
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }
        .header-brand-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .logo-icon {
            width: 34px;
            height: 34px;
            border-radius: 10px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, #3B82F6, #22D3EE);
            box-shadow: 0 0 18px rgba(59, 130, 246, 0.4);
            flex-shrink: 0;
        }
        .logo-text {
            font-size: 19px;
            font-weight: 800;
            letter-spacing: -0.01em;
            background: linear-gradient(135deg, #fff, #B8C7DD);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .header-channel-row {
            height: var(--channel-h);
            display: flex;
            align-items: center;
        }
        .channel-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            overflow-x: auto;
            scrollbar-width: none;
            white-space: nowrap;
            width: 100%;
        }
        .channel-nav::-webkit-scrollbar {
            display: none;
        }
        .channel-link {
            display: inline-flex;
            align-items: center;
            padding: 6px 18px;
            border-radius: var(--radius-tag);
            font-size: 14px;
            font-weight: 500;
            color: var(--text-mid);
            border: 1px solid transparent;
            white-space: nowrap;
            transition: all .3s ease;
        }
        .channel-link:hover {
            color: var(--text-high);
            background: var(--bg-glass);
        }
        .channel-link.active {
            background: rgba(34, 211, 238, 0.15);
            color: var(--cyan-glow);
            border-color: rgba(34, 211, 238, 0.2);
            box-shadow: inset 0 -2px 0 var(--cyan-glow);
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 14px;
            line-height: 1;
            padding: 12px 24px;
            cursor: pointer;
            transition: all .3s ease;
            border: 1px solid transparent;
        }
        .btn-primary {
            background: linear-gradient(135deg, #3B82F6, #22D3EE);
            color: #fff;
            box-shadow: var(--glow-primary);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 40px rgba(34, 211, 238, 0.5);
            filter: brightness(1.08);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 0 18px rgba(34, 211, 238, 0.3);
        }
        .btn-outline {
            background: transparent;
            border: 1px solid var(--border-glass-strong);
            color: var(--text-high);
        }
        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.06);
            border-color: var(--cyan-glow);
            box-shadow: 0 0 20px rgba(34, 211, 238, 0.15);
        }
        .btn-sm {
            padding: 8px 18px;
            font-size: 13px;
            border-radius: 8px;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            cursor: pointer;
            padding: 6px;
            border-radius: 8px;
        }
        .hamburger:focus-visible,
        .btn:focus-visible,
        .channel-link:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--cyan-glow);
            outline-offset: 2px;
        }
        .section-title-wrap {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 32px;
        }
        .section-title {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: clamp(24px, 3vw, 34px);
            font-weight: 700;
            letter-spacing: -0.02em;
        }
        .section-title::before {
            content: '';
            display: block;
            width: 4px;
            height: 26px;
            border-radius: 2px;
            background: linear-gradient(180deg, var(--primary-light), var(--cyan-glow));
            box-shadow: 0 0 12px rgba(34, 211, 238, 0.5);
            flex-shrink: 0;
        }
        .glass-card {
            background: var(--bg-glass);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 28px;
            position: relative;
            transition: all .4s ease;
            overflow: hidden;
        }
        .glass-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 15%;
            right: 15%;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.25), transparent);
        }
        .glass-card:hover {
            transform: translateY(-4px);
            background: var(--bg-glass-hover);
            border-color: var(--border-glass-strong);
            box-shadow: var(--shadow-card-hover);
        }
        .hero-section {
            position: relative;
            padding: 70px 0 60px;
            overflow: hidden;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(7, 14, 26, 0.92), rgba(7, 14, 26, 0.65));
            z-index: 1;
        }
        .hero-section::after {
            content: '';
            position: absolute;
            inset: 0;
            background-image: linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
            background-size: 40px 40px;
            z-index: 1;
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 720px;
        }
        .hero-title {
            font-size: clamp(36px, 5.5vw, 54px);
            font-weight: 800;
            line-height: 1.15;
            letter-spacing: -0.02em;
            margin-bottom: 18px;
        }
        .hero-title .grad-text {
            background: linear-gradient(135deg, #60A5FA, #22D3EE);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .hero-subtitle {
            font-size: 16px;
            color: var(--text-mid);
            margin-bottom: 30px;
            max-width: 560px;
        }
        .hero-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }
        .stats-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
            margin-top: 50px;
        }
        .stat-card {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.08);
            backdrop-filter: blur(12px);
            border-radius: 14px;
            padding: 20px 16px;
            text-align: center;
            transition: all .3s ease;
        }
        .stat-card:hover {
            border-color: rgba(34, 211, 238, 0.3);
            box-shadow: 0 0 24px rgba(34, 211, 238, 0.12);
        }
        .stat-card .num {
            font-family: 'Inter', 'DIN Alternate', 'Roboto', sans-serif;
            font-size: 26px;
            font-weight: 800;
            color: var(--green-accent);
            text-shadow: var(--glow-green);
        }
        .stat-card .label {
            font-size: 13px;
            color: var(--text-mid);
            margin-top: 4px;
        }
        .section-block {
            padding: 80px 0;
        }
        .section-block-alt {
            background: linear-gradient(180deg, var(--bg-panel), var(--bg-base));
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .feature-card {
            padding: 32px 24px;
        }
        .feature-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: rgba(34, 211, 238, 0.12);
            color: var(--cyan-glow);
            font-size: 22px;
            margin-bottom: 18px;
            border: 1px solid rgba(34, 211, 238, 0.2);
        }
        .feature-card h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 8px;
        }
        .feature-card p {
            font-size: 14px;
            color: var(--text-mid);
            line-height: 1.7;
        }
        .scene-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .scene-card {
            position: relative;
            border-radius: var(--radius-card);
            overflow: hidden;
            border: 1px solid var(--border-glass);
            background-size: cover;
            background-position: center;
            min-height: 280px;
            display: flex;
            align-items: flex-end;
            transition: all .4s ease;
        }
        .scene-card::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 20%, rgba(7, 14, 26, 0.88) 75%);
        }
        .scene-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
            border-color: var(--border-glass-strong);
        }
        .scene-card-body {
            position: relative;
            z-index: 2;
            padding: 24px;
            width: 100%;
        }
        .scene-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 6px;
        }
        .scene-card p {
            font-size: 13px;
            color: var(--text-mid);
        }
        .step-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            position: relative;
        }
        .step-card {
            text-align: left;
            padding: 32px 28px;
        }
        .step-num {
            font-family: 'Inter', 'DIN Alternate', 'Roboto', sans-serif;
            font-size: 48px;
            font-weight: 800;
            line-height: 1;
            background: linear-gradient(135deg, rgba(59, 130, 246, 0.8), rgba(34, 211, 238, 0.6));
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            margin-bottom: 14px;
        }
        .step-card h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 8px;
        }
        .step-card p {
            font-size: 14px;
            color: var(--text-mid);
            line-height: 1.7;
        }
        .case-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .case-card {
            display: grid;
            grid-template-columns: 1fr 1fr;
            border-radius: var(--radius-card);
            overflow: hidden;
            border: 1px solid var(--border-glass);
            background: var(--bg-glass);
            backdrop-filter: blur(12px);
            transition: all .4s ease;
            min-height: 220px;
        }
        .case-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
            border-color: var(--border-glass-strong);
        }
        .case-img {
            background-size: cover;
            background-position: center;
            min-height: 220px;
        }
        .case-body {
            padding: 24px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        .case-body h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .case-body p {
            font-size: 14px;
            color: var(--text-mid);
            margin-bottom: 14px;
            line-height: 1.6;
        }
        .badge {
            display: inline-flex;
            align-items: center;
            padding: 4px 14px;
            border-radius: var(--radius-tag);
            font-size: 12px;
            font-weight: 600;
            background: rgba(74, 222, 128, 0.15);
            color: var(--green-accent);
            border: 1px solid rgba(74, 222, 128, 0.2);
        }
        .badge-cyan {
            background: rgba(34, 211, 238, 0.12);
            color: var(--cyan-glow);
            border-color: rgba(34, 211, 238, 0.2);
        }
        .faq-container {
            max-width: 820px;
            margin: 0 auto;
        }
        .faq-item {
            border: 1px solid var(--border-glass);
            border-radius: 12px;
            margin-bottom: 12px;
            overflow: hidden;
            background: var(--bg-glass);
            transition: all .3s ease;
        }
        .faq-item.open {
            border-color: rgba(34, 211, 238, 0.3);
            box-shadow: 0 0 20px rgba(34, 211, 238, 0.08);
        }
        .faq-question {
            width: 100%;
            background: none;
            border: none;
            padding: 18px 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-high);
            text-align: left;
            transition: all .3s ease;
        }
        .faq-question:hover {
            color: var(--cyan-glow);
        }
        .faq-question .faq-icon {
            transition: transform .3s ease;
            color: var(--text-low);
            font-size: 18px;
            flex-shrink: 0;
            margin-left: 16px;
        }
        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            color: var(--cyan-glow);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .4s ease;
            padding: 0 20px;
            font-size: 14px;
            color: var(--text-mid);
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding-bottom: 16px;
        }
        .cta-section {
            position: relative;
            padding: 80px 0;
            background: linear-gradient(135deg, #0C1526, #1A2744);
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            bottom: -80px;
            left: 50%;
            transform: translateX(-50%);
            width: 600px;
            height: 300px;
            background: radial-gradient(ellipse, rgba(34, 211, 238, 0.18), transparent 70%);
            pointer-events: none;
        }
        .cta-inner {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 640px;
            margin: 0 auto;
        }
        .cta-title {
            font-size: clamp(28px, 3.5vw, 38px);
            font-weight: 800;
            margin-bottom: 12px;
        }
        .cta-subtitle {
            color: var(--text-mid);
            font-size: 15px;
            margin-bottom: 32px;
        }
        .cta-form {
            display: flex;
            gap: 12px;
            max-width: 520px;
            margin: 0 auto;
        }
        .cta-form input {
            flex: 1;
            height: 50px;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--border-glass);
            border-radius: 10px;
            padding: 0 18px;
            font-size: 14px;
            color: var(--text-high);
            outline: none;
            transition: all .3s ease;
        }
        .cta-form input::placeholder {
            color: var(--text-low);
        }
        .cta-form input:focus {
            border-color: var(--cyan-glow);
            box-shadow: var(--glow-cyan);
        }
        .cta-form .btn {
            height: 50px;
            padding: 0 30px;
            font-size: 15px;
        }
        .site-footer {
            background: var(--bg-deep);
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 48px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 40px;
            padding-bottom: 40px;
        }
        .footer-col h4 {
            font-size: 14px;
            font-weight: 700;
            color: var(--text-high);
            margin-bottom: 16px;
            letter-spacing: 0.02em;
        }
        .footer-col a {
            display: block;
            font-size: 14px;
            color: var(--text-mid);
            margin-bottom: 10px;
            line-height: 1.5;
        }
        .footer-col a:hover {
            color: var(--cyan-glow);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding: 20px 0;
        }
        .footer-bottom-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 13px;
            color: var(--text-low);
        }

        @media (max-width: 1024px) {
            .feature-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .case-grid {
                grid-template-columns: 1fr;
            }
            .scene-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .header-brand-row {
                height: var(--header-h);
            }
            .header-channel-row {
                height: var(--channel-h);
            }
        }
        @media (max-width: 767px) {
            .wrap {
                padding-left: 16px;
                padding-right: 16px;
            }
            .header-brand-row {
                height: 56px;
                border-bottom: none;
            }
            .header-channel-row {
                display: none;
            }
            .site-header {
                padding-bottom: 0;
            }
            .header-actions .btn {
                display: none;
            }
            .hamburger {
                display: inline-flex;
                align-items: center;
                justify-content: center;
            }
            .section-block {
                padding: 56px 0;
            }
            .stats-row {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }
            .feature-grid {
                grid-template-columns: 1fr;
            }
            .scene-grid {
                grid-template-columns: 1fr;
            }
            .step-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .case-card {
                grid-template-columns: 1fr;
                min-height: auto;
            }
            .case-img {
                min-height: 200px;
            }
            .cta-form {
                flex-direction: column;
            }
            .cta-form .btn {
                width: 100%;
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 32px;
            }
            .hero-section {
                padding: 50px 0 40px;
            }
            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .hero-actions .btn {
                width: 100%;
                justify-content: center;
            }
            .footer-bottom-inner {
                flex-direction: column;
                gap: 8px;
                text-align: center;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .section-title-wrap {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }
            .logo-text {
                font-size: 16px;
            }
            .stats-row .num {
                font-size: 20px;
            }
        }

        .mobile-menu {
            display: none;
            background: rgba(7, 14, 26, 0.95);
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 12px 16px 16px;
        }
        .mobile-menu.show {
            display: block;
        }
        .mobile-menu a {
            display: block;
            padding: 12px 16px;
            border-radius: 10px;
            font-size: 15px;
            color: var(--text-mid);
            margin-bottom: 4px;
        }
        .mobile-menu a:hover,
        .mobile-menu a.active {
            background: rgba(34, 211, 238, 0.12);
            color: var(--cyan-glow);
        }

/* roulang page: category3 */
:root {
            --bg-base: #070E1A;
            --bg-panel: #0C1526;
            --bg-deep: #050B14;
            --bg-glass: rgba(255, 255, 255, 0.05);
            --bg-glass-hover: rgba(255, 255, 255, 0.09);
            --border-glass: rgba(255, 255, 255, 0.10);
            --border-glass-strong: rgba(255, 255, 255, 0.2);
            --primary: #3B82F6;
            --primary-light: #60A5FA;
            --cyan-glow: #22D3EE;
            --green-accent: #4ADE80;
            --text-high: #F2F6FC;
            --text-mid: #B0BED0;
            --text-low: #6B7A90;
            --radius-card: 16px;
            --radius-btn: 10px;
            --radius-tag: 999px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.35);
            --shadow-card-hover: 0 14px 40px rgba(0, 0, 0, 0.45);
            --glow-primary: 0 0 30px rgba(59, 130, 246, 0.35);
            --glow-cyan: 0 0 24px rgba(34, 211, 238, 0.3);
            --glow-green: 0 0 20px rgba(74, 222, 128, 0.25);
            --header-h: 64px;
            --channel-h: 46px;
            --max-w: 1200px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            background: var(--bg-base);
            color: var(--text-high);
            line-height: 1.7;
            font-size: 15px;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color .25s ease, border-color .25s ease, background .25s ease;
        }

        a:hover {
            color: var(--cyan-glow);
        }

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

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

        input {
            font-family: inherit;
        }

        .wrap {
            max-width: var(--max-w);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(7, 14, 26, 0.85);
            backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-glass);
            transition: background .35s ease, box-shadow .35s ease;
        }

        .header-brand-row {
            height: var(--header-h);
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }

        .header-brand-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }

        .logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 20px;
            letter-spacing: -0.01em;
            color: var(--text-high);
        }

        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 34px;
            height: 34px;
            border-radius: 9px;
            background: linear-gradient(135deg, var(--primary), var(--cyan-glow));
            box-shadow: var(--glow-primary);
            flex-shrink: 0;
        }

        .logo-text {
            white-space: nowrap;
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .hamburger {
            display: none;
            background: none;
            border: 1px solid var(--border-glass);
            border-radius: 8px;
            padding: 8px 10px;
            line-height: 1;
            color: var(--text-high);
            transition: border-color .25s ease, background .25s ease;
        }

        .hamburger:hover {
            border-color: var(--cyan-glow);
            background: var(--bg-glass);
        }

        .header-channel-row {
            height: var(--channel-h);
            display: flex;
            align-items: center;
        }

        .channel-nav {
            display: flex;
            align-items: center;
            gap: 6px;
            overflow-x: auto;
            scrollbar-width: none;
            white-space: nowrap;
        }

        .channel-nav::-webkit-scrollbar {
            display: none;
        }

        .channel-link {
            display: inline-flex;
            align-items: center;
            padding: 6px 18px;
            border-radius: var(--radius-tag);
            font-size: 14px;
            font-weight: 500;
            color: var(--text-mid);
            border: 1px solid transparent;
            transition: all .25s ease;
            position: relative;
        }

        .channel-link:hover {
            color: var(--text-high);
            background: rgba(255, 255, 255, 0.04);
            border-color: var(--border-glass);
        }

        .channel-link.active {
            color: var(--cyan-glow);
            background: rgba(34, 211, 238, 0.12);
            border-color: rgba(34, 211, 238, 0.2);
            font-weight: 600;
        }

        .channel-link.active::after {
            content: "";
            position: absolute;
            bottom: -2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 2px;
            border-radius: 2px;
            background: var(--cyan-glow);
            box-shadow: var(--glow-cyan);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-weight: 600;
            font-size: 14px;
            border-radius: var(--radius-btn);
            padding: 12px 28px;
            border: 1px solid transparent;
            transition: all .3s ease;
            line-height: 1.4;
            white-space: nowrap;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--cyan-glow));
            color: #fff;
            box-shadow: var(--glow-primary);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 40px rgba(34, 211, 238, 0.5);
            color: #fff;
            filter: brightness(1.08);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 0 16px rgba(34, 211, 238, 0.3);
        }

        .btn-primary:focus-visible {
            outline: 2px solid var(--cyan-glow);
            outline-offset: 3px;
        }

        .btn-outline {
            background: transparent;
            border-color: var(--border-glass-strong);
            color: var(--text-high);
        }

        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.06);
            border-color: var(--cyan-glow);
            color: var(--cyan-glow);
            transform: translateY(-2px);
        }

        .btn-outline:active {
            transform: translateY(0);
        }

        .btn-outline:focus-visible {
            outline: 2px solid var(--cyan-glow);
            outline-offset: 3px;
        }

        .btn-sm {
            padding: 9px 18px;
            font-size: 13px;
            border-radius: 8px;
        }

        .btn-lg {
            padding: 16px 40px;
            font-size: 16px;
            border-radius: 12px;
        }

        .hero {
            position: relative;
            padding: 80px 0 0;
            background: radial-gradient(ellipse at 20% 0%, rgba(59, 130, 246, 0.2), transparent 55%),
                radial-gradient(ellipse at 85% 20%, rgba(34, 211, 238, 0.08), transparent 45%),
                var(--bg-base);
            overflow: hidden;
            border-bottom: 1px solid var(--border-glass);
        }

        .hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background-image: linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
            background-size: 40px 40px;
            pointer-events: none;
            opacity: 0.5;
        }

        .hero::after {
            content: "";
            position: absolute;
            right: 0;
            top: 0;
            bottom: 0;
            width: 45%;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            opacity: 0.55;
            mask-image: linear-gradient(to left, rgba(0, 0, 0, 0.9), transparent 90%);
            -webkit-mask-image: linear-gradient(to left, rgba(0, 0, 0, 0.9), transparent 90%);
            pointer-events: none;
            z-index: 0;
        }

        .hero-inner {
            position: relative;
            z-index: 2;
            display: flex;
            flex-direction: column;
            min-height: 480px;
            justify-content: center;
            padding: 40px 0 60px;
        }

        .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 16px;
            border-radius: var(--radius-tag);
            background: rgba(34, 211, 238, 0.1);
            border: 1px solid rgba(34, 211, 238, 0.2);
            color: var(--cyan-glow);
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 24px;
            width: fit-content;
        }

        .hero-title {
            font-size: clamp(36px, 5.5vw, 48px);
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: -0.02em;
            margin-bottom: 16px;
            max-width: 620px;
        }

        .hero-title .gradient-text {
            background: linear-gradient(135deg, var(--primary-light), var(--cyan-glow));
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            color: transparent;
        }

        .hero-subtitle {
            color: var(--text-mid);
            font-size: 16px;
            line-height: 1.8;
            margin-bottom: 32px;
            max-width: 520px;
        }

        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 48px;
        }

        .hero-stats {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 0;
            border-radius: var(--radius-card);
            background: var(--bg-glass);
            border: 1px solid var(--border-glass);
            backdrop-filter: blur(16px);
            overflow: hidden;
            margin-top: 20px;
            max-width: 800px;
        }

        .hero-stat {
            padding: 24px 20px;
            text-align: center;
            border-right: 1px solid var(--border-glass);
        }

        .hero-stat:last-child {
            border-right: none;
        }

        .hero-stat-num {
            font-family: "Inter", "DIN Alternate", "Roboto", sans-serif;
            font-size: 26px;
            font-weight: 800;
            color: var(--green-accent);
            text-shadow: var(--glow-green);
            letter-spacing: -0.02em;
        }

        .hero-stat-label {
            font-size: 13px;
            color: var(--text-low);
            margin-top: 4px;
        }

        .section {
            padding: 80px 0;
        }

        .section-alt {
            background: linear-gradient(180deg, rgba(12, 21, 38, 0.4), transparent);
        }

        .section-head {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 24px;
            margin-bottom: 40px;
        }

        .section-title {
            font-size: clamp(24px, 3vw, 32px);
            font-weight: 700;
            line-height: 1.3;
            letter-spacing: -0.01em;
            padding-left: 14px;
            border-left: 4px solid var(--cyan-glow);
            color: var(--text-high);
        }

        .section-desc {
            color: var(--text-mid);
            font-size: 14px;
            max-width: 420px;
            line-height: 1.7;
        }

        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .card-grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .glass-card {
            background: var(--bg-glass);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            backdrop-filter: blur(16px);
            padding: 32px 28px;
            position: relative;
            transition: transform .3s ease, box-shadow .3s ease, background .3s ease, border-color .3s ease;
            overflow: hidden;
        }

        .glass-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 15%;
            right: 15%;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.25), transparent);
            pointer-events: none;
        }

        .glass-card:hover {
            transform: translateY(-4px);
            background: var(--bg-glass-hover);
            border-color: var(--border-glass-strong);
            box-shadow: var(--shadow-card-hover);
        }

        .card-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: rgba(34, 211, 238, 0.12);
            border: 1px solid rgba(34, 211, 238, 0.18);
            color: var(--cyan-glow);
            margin-bottom: 20px;
        }

        .card-title {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-high);
            margin-bottom: 10px;
        }

        .card-text {
            font-size: 14px;
            color: var(--text-mid);
            line-height: 1.75;
        }

        .step-num {
            font-family: "Inter", "DIN Alternate", "Roboto", sans-serif;
            font-size: 44px;
            font-weight: 800;
            line-height: 1;
            background: linear-gradient(135deg, rgba(59, 130, 246, 0.8), rgba(34, 211, 238, 0.6));
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            color: transparent;
            margin-bottom: 18px;
            display: block;
        }

        .steps-wrapper {
            position: relative;
        }

        .steps-wrapper::before {
            content: "";
            position: absolute;
            top: 44px;
            left: 10%;
            right: 10%;
            border-top: 2px dashed rgba(255, 255, 255, 0.12);
            z-index: 0;
            pointer-events: none;
        }

        .step-card {
            position: relative;
            z-index: 1;
        }

        .mode-card {
            overflow: hidden;
        }

        .mode-card .card-img {
            height: 0;
            padding-bottom: 56.25%;
            background-size: cover;
            background-position: center;
            border-radius: var(--radius-card) var(--radius-card) 0 0;
            position: relative;
        }

        .mode-card .card-img::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 40%, rgba(7, 14, 26, 0.6));
            border-radius: inherit;
        }

        .mode-card .card-body {
            padding: 24px 24px 28px;
        }

        .badge {
            display: inline-flex;
            align-items: center;
            padding: 4px 14px;
            border-radius: var(--radius-tag);
            font-size: 12px;
            font-weight: 600;
            line-height: 1.5;
        }

        .badge-green {
            background: rgba(74, 222, 128, 0.15);
            color: var(--green-accent);
            border: 1px solid rgba(74, 222, 128, 0.2);
        }

        .badge-cyan {
            background: rgba(34, 211, 238, 0.12);
            color: var(--cyan-glow);
            border: 1px solid rgba(34, 211, 238, 0.18);
        }

        .badge-blue {
            background: rgba(59, 130, 246, 0.15);
            color: var(--primary-light);
            border: 1px solid rgba(59, 130, 246, 0.2);
        }

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

        .scene-item {
            display: flex;
            gap: 20px;
            padding: 28px;
            background: var(--bg-glass);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-card);
            backdrop-filter: blur(14px);
            transition: all .3s ease;
        }

        .scene-item:hover {
            background: var(--bg-glass-hover);
            border-color: var(--border-glass-strong);
            transform: translateY(-3px);
            box-shadow: var(--shadow-card-hover);
        }

        .scene-icon {
            flex-shrink: 0;
            width: 46px;
            height: 46px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(34, 211, 238, 0.1);
            border: 1px solid rgba(34, 211, 238, 0.15);
            color: var(--cyan-glow);
        }

        .scene-content h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--text-high);
            margin-bottom: 6px;
        }

        .scene-content p {
            font-size: 14px;
            color: var(--text-mid);
            line-height: 1.7;
        }

        .faq {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            border: 1px solid var(--border-glass);
            border-radius: 12px;
            margin-bottom: 12px;
            background: var(--bg-glass);
            overflow: hidden;
            transition: border-color .3s ease;
        }

        .faq-item.open {
            border-color: rgba(34, 211, 238, 0.3);
        }

        .faq-btn {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 22px;
            background: none;
            border: none;
            color: var(--text-high);
            font-size: 15px;
            font-weight: 600;
            text-align: left;
            transition: color .3s;
        }

        .faq-btn:hover {
            color: var(--cyan-glow);
        }

        .faq-icon {
            flex-shrink: 0;
            width: 22px;
            height: 22px;
            border-radius: 50%;
            border: 1px solid var(--border-glass-strong);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            color: var(--text-mid);
            transition: all .3s ease;
            line-height: 1;
            background: transparent;
        }

        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            border-color: var(--cyan-glow);
            color: var(--cyan-glow);
        }

        .faq-body {
            padding: 0 22px 20px;
            color: var(--text-mid);
            font-size: 14px;
            line-height: 1.75;
            display: none;
        }

        .faq-item.open .faq-body {
            display: block;
            animation: fadeIn .3s ease;
        }

        @keyframes fadeIn {
            from {
                opacity: 0;
                transform: translateY(-6px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .cta-section {
            padding: 90px 0;
            background: linear-gradient(135deg, #0C1526, #1A2744);
            position: relative;
            overflow: hidden;
            border-top: 1px solid var(--border-glass);
        }

        .cta-section::before {
            content: "";
            position: absolute;
            bottom: -40%;
            left: 50%;
            transform: translateX(-50%);
            width: 600px;
            height: 300px;
            background: radial-gradient(ellipse, rgba(34, 211, 238, 0.25), transparent 70%);
            pointer-events: none;
        }

        .cta-inner {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 640px;
            margin: 0 auto;
        }

        .cta-title {
            font-size: clamp(28px, 4vw, 38px);
            font-weight: 700;
            margin-bottom: 12px;
            letter-spacing: -0.01em;
        }

        .cta-subtitle {
            color: var(--text-mid);
            font-size: 15px;
            margin-bottom: 36px;
            line-height: 1.7;
        }

        .cta-form {
            display: flex;
            gap: 12px;
            max-width: 480px;
            margin: 0 auto;
        }

        .cta-input {
            flex: 1;
            height: 52px;
            padding: 0 20px;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--border-glass);
            border-radius: 10px;
            color: var(--text-high);
            font-size: 15px;
            outline: none;
            transition: border-color .3s, box-shadow .3s;
        }

        .cta-input::placeholder {
            color: var(--text-low);
        }

        .cta-input:focus {
            border-color: var(--cyan-glow);
            box-shadow: var(--glow-cyan);
        }

        .cta-input:focus-visible {
            outline: 2px solid var(--cyan-glow);
            outline-offset: 2px;
        }

        .site-footer {
            background: var(--bg-deep);
            border-top: 1px solid var(--border-glass);
            padding: 60px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 40px;
            padding-bottom: 40px;
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-high);
            margin-bottom: 16px;
        }

        .footer-col a {
            display: block;
            font-size: 14px;
            color: var(--text-mid);
            padding: 5px 0;
            transition: color .25s ease, padding-left .25s ease;
        }

        .footer-col a:hover {
            color: var(--cyan-glow);
            padding-left: 4px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding: 22px 0;
        }

        .footer-bottom-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            flex-wrap: wrap;
            font-size: 13px;
            color: var(--text-low);
        }

        .mobile-menu {
            display: none;
            background: var(--bg-panel);
            border-top: 1px solid var(--border-glass);
            padding: 12px 0 16px;
        }

        .mobile-menu.open {
            display: block;
            position: fixed;
            top: 56px;
            left: 0;
            right: 0;
            z-index: 49;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
            max-height: calc(100vh - 56px);
            overflow-y: auto;
        }

        .mobile-menu a {
            display: block;
            padding: 12px 24px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-mid);
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }

        .mobile-menu a:hover {
            color: var(--cyan-glow);
            background: rgba(255, 255, 255, 0.03);
        }

        .mobile-menu a.active {
            color: var(--cyan-glow);
            font-weight: 600;
            background: rgba(34, 211, 238, 0.06);
        }

        @media (max-width: 1023px) {
            .card-grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }

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

            .hero::after {
                width: 35%;
                opacity: 0.4;
            }

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

            .hero-stat:nth-child(2) {
                border-right: none;
            }

            .hero-stat:nth-child(1),
            .hero-stat:nth-child(2) {
                border-bottom: 1px solid var(--border-glass);
            }
        }

        @media (max-width: 767px) {
            .header-brand-row {
                height: 56px;
            }

            .header-channel-row {
                display: none;
            }

            .hamburger {
                display: inline-flex;
            }

            .header-actions .btn-primary {
                display: none !important;
            }

            .hero {
                padding-top: 56px;
            }

            .hero-inner {
                min-height: auto;
                padding: 32px 0 40px;
                align-items: center;
                text-align: center;
            }

            .hero-title {
                font-size: 30px;
                line-height: 1.3;
            }

            .hero-subtitle {
                font-size: 15px;
                margin-left: auto;
                margin-right: auto;
            }

            .hero-actions {
                justify-content: center;
                flex-direction: column;
                width: 100%;
            }

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

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

            .hero::after {
                content: none;
            }

            .hero:before {
                opacity: 0.35;
            }

            .hero-stats {
                grid-template-columns: repeat(2, 1fr);
                max-width: 100%;
                width: 100%;
            }

            .hero-stat {
                padding: 18px 12px;
            }

            .hero-stat-num {
                font-size: 22px;
            }

            .section {
                padding: 56px 0;
            }

            .card-grid,
            .card-grid-4 {
                grid-template-columns: 1fr;
            }

            .section-head {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
                margin-bottom: 28px;
            }

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

            .cta-section {
                padding: 64px 0;
            }

            .cta-form {
                flex-direction: column;
            }

            .cta-input {
                width: 100%;
            }

            .cta-form .btn {
                width: 100%;
            }

            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 32px;
            }

            .steps-wrapper::before {
                display: none;
            }

            .wrap {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }

            .hero-stat-label {
                font-size: 12px;
            }

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