/* roulang page: index */
:root {
            --bg-base: #050A15;
            --bg-panel: #0B1220;
            --bg-panel-light: #111A2E;
            --primary: #22D3EE;
            --primary-hover: #06B6D4;
            --accent: #F97316;
            --text-hi: #F8FAFC;
            --text-mid: #94A3B8;
            --text-low: #64748B;
            --border-white: rgba(255, 255, 255, 0.1);
            --radius-card: 12px;
            --radius-btn: 999px;
            --shadow-glow: 0 0 20px rgba(34, 211, 238, 0.4);
            --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.35);
            --font-sans: system-ui, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-base);
            color: var(--text-hi);
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
            padding-top: 64px;
            overflow-x: hidden;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color .3s ease, border-color .3s ease, background .3s ease, box-shadow .3s ease, transform .3s ease;
        }

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

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

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

        a:focus-visible,
        button:focus-visible {
            outline: 2px solid rgba(34, 211, 238, .7);
            outline-offset: 2px;
            border-radius: 4px;
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .section {
            padding: 84px 0;
            position: relative;
        }

        .section-head {
            text-align: center;
            max-width: 660px;
            margin: 0 auto 56px;
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 5px 14px;
            background: rgba(34, 211, 238, .12);
            border: 1px solid rgba(34, 211, 238, .3);
            color: #67E8F9;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: .02em;
        }

        .section-title {
            font-size: 2rem;
            font-weight: 800;
            line-height: 1.3;
            color: #F8FAFC;
            margin-top: 14px;
            letter-spacing: -0.01em;
        }

        .section-desc {
            color: #94A3B8;
            font-size: 1rem;
            margin-top: 8px;
        }

        .glass-card {
            background: rgba(255, 255, 255, .05);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid rgba(255, 255, 255, .1);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            transition: all .3s ease;
        }

        .glass-card:hover {
            background: rgba(255, 255, 255, .1);
            border-color: rgba(255, 255, 255, .25);
            transform: translateY(-4px);
            box-shadow: 0 16px 40px rgba(0, 0, 0, .45);
        }

        .btn-glow {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: linear-gradient(135deg, #22D3EE, #14B8A6);
            color: #050A15;
            font-weight: 700;
            font-size: .92rem;
            padding: 10px 24px;
            border-radius: 999px;
            box-shadow: 0 0 20px rgba(34, 211, 238, .35);
            transition: all .3s ease;
            border: none;
            line-height: 1.5;
            white-space: nowrap;
        }

        .btn-glow:hover {
            box-shadow: 0 0 32px rgba(34, 211, 238, .65);
            transform: translateY(-2px);
            color: #050A15;
        }

        .btn-glow:active {
            transform: translateY(1px);
            box-shadow: 0 0 14px rgba(34, 211, 238, .3);
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: rgba(255, 255, 255, .05);
            border: 1px solid rgba(255, 255, 255, .25);
            color: #F8FAFC;
            font-weight: 600;
            font-size: .92rem;
            padding: 10px 24px;
            border-radius: 999px;
            transition: all .3s ease;
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            line-height: 1.5;
            white-space: nowrap;
        }

        .btn-outline:hover {
            background: rgba(255, 255, 255, .12);
            border-color: rgba(255, 255, 255, .4);
            color: #fff;
            transform: translateY(-2px);
        }

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

        .btn-lg {
            padding: 14px 36px;
            font-size: 1rem;
        }

        .btn-sm {
            padding: 7px 18px;
            font-size: .8rem;
        }

        .btn-block {
            width: 100%;
            display: flex;
        }

        .badge {
            display: inline-flex;
            align-items: center;
            padding: 2px 12px;
            background: rgba(249, 115, 22, .15);
            border: 1px solid rgba(249, 115, 22, .35);
            color: #FDBA74;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 600;
            line-height: 1.6;
        }

        /* Header */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 64px;
            background: rgba(5, 10, 21, .72);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(255, 255, 255, .1);
            z-index: 100;
        }

        .nav-wrap {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
            gap: 24px;
        }

        .brand {
            display: flex;
            align-items: baseline;
            gap: 8px;
            flex-shrink: 0;
        }

        .brand-main {
            font-size: 1.45rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.02em;
            background: linear-gradient(90deg, #22D3EE, #14B8A6);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .brand-sub {
            font-size: .78rem;
            color: rgba(255, 255, 255, .6);
            font-weight: 500;
            letter-spacing: .04em;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            flex: 1;
            justify-content: center;
        }

        .nav-link {
            padding: 8px 14px;
            color: #CBD5E1;
            font-size: .92rem;
            font-weight: 500;
            border-radius: 8px;
            position: relative;
            transition: all .25s ease;
        }

        .nav-link:hover {
            color: #fff;
            background: rgba(255, 255, 255, .06);
        }

        .nav-link.active {
            color: #67E8F9;
            font-weight: 600;
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 14px;
            right: 14px;
            height: 2px;
            background: linear-gradient(90deg, #22D3EE, #14B8A6);
            border-radius: 2px;
        }

        .nav-right {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .nav-toggle {
            display: none;
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            border-radius: 8px;
            border: 1px solid rgba(255, 255, 255, .15);
            background: rgba(255, 255, 255, .04);
            color: #E2E8F0;
        }

        .nav-toggle:hover {
            background: rgba(255, 255, 255, .1);
        }

        .nav-cta-mobile {
            display: none !important;
        }

        /* Hero */
        .hero {
            position: relative;
            min-height: calc(92vh - 64px);
            display: flex;
            align-items: center;
            background: linear-gradient(to bottom, rgba(5, 10, 21, .72), rgba(5, 10, 21, .92)), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: -18%;
            left: 50%;
            transform: translateX(-50%);
            width: 720px;
            height: 720px;
            background: radial-gradient(circle, rgba(34, 211, 238, .18), transparent 65%);
            filter: blur(30px);
            pointer-events: none;
        }

        .hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 160px;
            background: linear-gradient(to top, #050A15, transparent);
            pointer-events: none;
        }

        .hero-inner {
            position: relative;
            z-index: 2;
            text-align: center;
            padding-top: 40px;
            padding-bottom: 60px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(249, 115, 22, .15);
            border: 1px solid rgba(249, 115, 22, .35);
            color: #FDBA74;
            padding: 6px 18px;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 600;
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            margin-bottom: 24px;
        }

        .hero h1 {
            font-size: 3rem;
            font-weight: 800;
            line-height: 1.2;
            color: #fff;
            letter-spacing: -0.02em;
            text-shadow: 0 0 60px rgba(0, 0, 0, .4);
        }

        .hero-sub {
            color: #CBD5E1;
            font-size: 1.2rem;
            margin-top: 16px;
            max-width: 540px;
            margin-left: auto;
            margin-right: auto;
            line-height: 1.6;
        }

        .hero-buttons {
            display: flex;
            justify-content: center;
            gap: 18px;
            margin-top: 36px;
            flex-wrap: wrap;
        }

        .hero-trust {
            display: flex;
            justify-content: center;
            gap: 24px;
            margin-top: 40px;
            flex-wrap: wrap;
            color: rgba(255, 255, 255, .55);
            font-size: .85rem;
            font-weight: 500;
        }

        .hero-trust span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .hero-trust svg {
            width: 16px;
            height: 16px;
            color: #22D3EE;
        }

        /* Feature cards */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }

        .feature-card {
            padding: 32px 28px;
            display: flex;
            flex-direction: column;
            gap: 16px;
            position: relative;
            overflow: hidden;
        }

        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 120px;
            height: 120px;
            background: radial-gradient(circle, rgba(34, 211, 238, .1), transparent 70%);
            opacity: 0;
            transition: opacity .4s ease;
        }

        .feature-card:hover::before {
            opacity: 1;
        }

        .feature-card.feature-main {
            background: rgba(255, 255, 255, .08);
            border-color: rgba(34, 211, 238, .3);
            box-shadow: 0 0 35px rgba(34, 211, 238, .08);
        }

        .feature-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(34, 211, 238, .12);
            border: 1px solid rgba(34, 211, 238, .25);
            color: #67E8F9;
            flex-shrink: 0;
        }

        .feature-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: #F8FAFC;
        }

        .feature-card p {
            color: #94A3B8;
            font-size: .92rem;
            line-height: 1.7;
            flex: 1;
        }

        .feature-link {
            color: #22D3EE;
            font-size: .88rem;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: gap .3s ease;
        }

        .feature-link:hover {
            gap: 8px;
            color: #A5F3FC;
        }

        /* Scenarios */
        .scenario-block {
            margin-bottom: 64px;
        }

        .scenario-block:last-child {
            margin-bottom: 0;
        }

        .scenario-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .scenario-img {
            border-radius: 16px;
            overflow: hidden;
            border: 1px solid rgba(255, 255, 255, .12);
            box-shadow: 0 20px 50px rgba(0, 0, 0, .5);
            position: relative;
        }

        .scenario-img img {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            transition: transform .5s ease;
        }

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

        .scenario-img::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 60%, rgba(5, 10, 21, .4));
            pointer-events: none;
        }

        .scenario-content {
            padding: 8px 0;
        }

        .scenario-num {
            font-size: 3.2rem;
            font-weight: 800;
            line-height: 1;
            color: rgba(249, 115, 22, .45);
            -webkit-text-stroke: 1px rgba(249, 115, 22, .3);
            letter-spacing: .02em;
        }

        .scenario-content h3 {
            font-size: 1.4rem;
            font-weight: 700;
            margin-top: 8px;
            color: #F8FAFC;
        }

        .scenario-content ul {
            list-style: none;
            margin-top: 16px;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .scenario-content li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            color: #B6C2D6;
            font-size: .95rem;
        }

        .scenario-content li::before {
            content: '';
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: #22D3EE;
            margin-top: 10px;
            flex-shrink: 0;
            box-shadow: 0 0 8px rgba(34, 211, 238, .6);
        }

        /* Steps */
        .steps-wrap {
            margin-top: 56px;
            padding: 32px 0 8px;
            border-top: 1px solid rgba(255, 255, 255, .08);
        }

        .steps-title {
            font-size: 1rem;
            font-weight: 700;
            color: #E2E8F0;
            text-align: center;
            margin-bottom: 28px;
        }

        .steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
            list-style: none;
        }

        .step {
            text-align: center;
            padding: 20px 16px;
            border-radius: 12px;
            background: rgba(255, 255, 255, .03);
            border: 1px solid rgba(255, 255, 255, .07);
            transition: all .3s ease;
        }

        .step:hover {
            background: rgba(255, 255, 255, .06);
            border-color: rgba(34, 211, 238, .25);
        }

        .step-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: rgba(34, 211, 238, .15);
            border: 1px solid rgba(34, 211, 238, .35);
            color: #67E8F9;
            font-size: .85rem;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .step strong {
            display: block;
            color: #E2E8F0;
            font-size: .95rem;
            margin-bottom: 4px;
        }

        .step p {
            color: #64748B;
            font-size: .8rem;
            line-height: 1.5;
        }

        /* Stats */
        .stats-section {
            background: linear-gradient(180deg, #0B1220, #0F1A2E);
            border-top: 1px solid rgba(255, 255, 255, .08);
            border-bottom: 1px solid rgba(255, 255, 255, .08);
        }

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

        .stat-item {
            padding: 28px 16px;
        }

        .stat-number {
            font-size: 2.8rem;
            font-weight: 800;
            color: #22D3EE;
            text-shadow: 0 0 32px rgba(34, 211, 238, .45);
            line-height: 1.2;
            letter-spacing: -0.02em;
        }

        .stat-label {
            color: #94A3B8;
            font-size: .9rem;
            margin-top: 6px;
        }

        .stat-quote {
            max-width: 760px;
            margin: 40px auto 0;
            padding: 28px 32px;
            text-align: center;
            box-shadow: 0 8px 30px rgba(0, 0, 0, .3);
        }

        .stat-quote p {
            color: #CBD5E1;
            font-size: 1.05rem;
            font-style: italic;
            line-height: 1.8;
        }

        .stat-quote cite {
            display: block;
            margin-top: 12px;
            color: #64748B;
            font-style: normal;
            font-size: .85rem;
        }

        /* Pricing */
        .price-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            align-items: stretch;
        }

        .price-card {
            padding: 36px 30px;
            display: flex;
            flex-direction: column;
            gap: 20px;
            position: relative;
        }

        .price-card h4 {
            font-size: 1.2rem;
            font-weight: 700;
            color: #F8FAFC;
        }

        .price-value {
            font-size: 2.6rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.1;
        }

        .price-value span {
            font-size: .95rem;
            font-weight: 400;
            color: #94A3B8;
        }

        .price-card ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
            flex: 1;
        }

        .price-card li {
            color: #B6C2D6;
            font-size: .9rem;
            display: flex;
            align-items: flex-start;
            gap: 8px;
        }

        .price-card li::before {
            content: '✓';
            color: #22D3EE;
            font-weight: 700;
            flex-shrink: 0;
        }

        .price-featured {
            background: rgba(255, 255, 255, .09);
            border: 1px solid rgba(34, 211, 238, .45) !important;
            transform: scale(1.02) translateY(-16px);
            box-shadow: 0 0 48px rgba(34, 211, 238, .12);
            z-index: 2;
        }

        .price-featured:hover {
            background: rgba(255, 255, 255, .13);
            transform: scale(1.02) translateY(-20px);
            box-shadow: 0 0 60px rgba(34, 211, 238, .18);
        }

        .featured-badge {
            position: absolute;
            top: -14px;
            left: 50%;
            transform: translateX(-50%);
            background: rgba(249, 115, 22, .2);
            border: 1px solid rgba(249, 115, 22, .4);
            color: #FDBA74;
            font-size: 12px;
            font-weight: 700;
            padding: 4px 16px;
            border-radius: 999px;
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            white-space: nowrap;
        }

        /* CMS News */
        .news-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .news-card {
            display: flex;
            gap: 20px;
            padding: 18px;
            align-items: center;
            border-radius: 12px;
        }

        .news-card:hover {
            border-color: rgba(34, 211, 238, .35);
            background: rgba(255, 255, 255, .09);
            transform: translateY(-2px);
        }

        .news-thumb {
            width: 240px;
            flex-shrink: 0;
            border-radius: 10px;
            overflow: hidden;
            border: 1px solid rgba(255, 255, 255, .08);
        }

        .news-thumb img {
            width: 100%;
            height: 130px;
            object-fit: cover;
            transition: transform .4s ease;
        }

        .news-card:hover .news-thumb img {
            transform: scale(1.05);
        }

        .news-body {
            flex: 1;
            min-width: 0;
        }

        .news-body h4 {
            font-size: 1rem;
            font-weight: 700;
            color: #F8FAFC;
            line-height: 1.5;
            overflow: hidden;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
        }

        .news-body h4:hover {
            color: #67E8F9;
        }

        .news-body p {
            color: #94A3B8;
            font-size: .9rem;
            margin-top: 6px;
            overflow: hidden;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
        }

        .news-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-top: 10px;
            flex-wrap: wrap;
        }

        .news-meta .tag {
            display: inline-flex;
            align-items: center;
            padding: 2px 12px;
            background: rgba(34, 211, 238, .1);
            border: 1px solid rgba(34, 211, 238, .25);
            color: #67E8F9;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 500;
        }

        .news-meta time {
            color: #64748B;
            font-size: .8rem;
        }

        .empty-state {
            border: 1px dashed rgba(255, 255, 255, .2);
            border-radius: 16px;
            padding: 48px 24px;
            text-align: center;
            color: #94A3B8;
            font-size: .95rem;
            background: rgba(255, 255, 255, .02);
        }

        /* FAQ */
        .faq-wrap {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .faq-item {
            overflow: hidden;
            background: rgba(255, 255, 255, .05);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border: 1px solid rgba(255, 255, 255, .1);
            border-radius: 12px;
            box-shadow: var(--shadow-card);
            transition: border-color .3s ease, background .3s ease;
        }

        .faq-item details {
            padding: 0;
        }

        .faq-item summary {
            padding: 20px 24px;
            cursor: pointer;
            font-size: 1rem;
            font-weight: 600;
            color: #F8FAFC;
            list-style: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            transition: color .3s ease;
            user-select: none;
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary::after {
            content: '+';
            font-size: 1.5rem;
            font-weight: 300;
            color: #67E8F9;
            transition: transform .3s ease;
            flex-shrink: 0;
            line-height: 1;
        }

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

        .faq-item details[open] {
            border-color: rgba(34, 211, 238, .25);
        }

        .faq-item summary:hover {
            color: #A5F3FC;
        }

        .faq-answer {
            padding: 0 24px 22px;
            color: #94A3B8;
            font-size: .92rem;
            line-height: 1.8;
            border-top: 1px solid rgba(255, 255, 255, .05);
            margin-top: 0;
            padding-top: 14px;
        }

        /* CTA */
        .cta-section {
            background: linear-gradient(180deg, rgba(5, 10, 21, .8), rgba(5, 10, 21, .92)), url('/assets/images/backpic/back-3.webp') center/cover no-repeat;
            text-align: center;
            border-top: 1px solid rgba(255, 255, 255, .08);
        }

        .cta-content {
            max-width: 640px;
            margin: 0 auto;
        }

        .cta-content h2 {
            font-size: 2.2rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.3;
        }

        .cta-content p {
            color: #94A3B8;
            font-size: 1.05rem;
            margin-top: 14px;
            line-height: 1.7;
        }

        .cta-content .btn-glow {
            margin-top: 28px;
        }

        /* Footer */
        .site-footer {
            background: #05070D;
            border-top: 1px solid rgba(255, 255, 255, .08);
            padding: 60px 0 28px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1.2fr;
            gap: 48px;
            margin-bottom: 40px;
        }

        .footer-brand .brand-main {
            font-size: 1.3rem;
        }

        .footer-brand .brand-sub {
            font-size: .72rem;
        }

        .footer-brand p {
            color: #64748B;
            font-size: .88rem;
            margin-top: 16px;
            max-width: 340px;
            line-height: 1.7;
        }

        .footer-title {
            font-size: .95rem;
            font-weight: 700;
            color: #E2E8F0;
            margin-bottom: 16px;
        }

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

        .footer-links a {
            color: #64748B;
            font-size: .88rem;
            transition: color .3s ease, padding-left .3s ease;
        }

        .footer-links a:hover {
            color: #67E8F9;
            padding-left: 4px;
        }

        .footer-contact {
            color: #64748B;
            font-size: .88rem;
        }

        .footer-contact p {
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .footer-contact a {
            color: #94A3B8;
        }

        .footer-contact a:hover {
            color: #67E8F9;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .06);
            padding-top: 24px;
            text-align: center;
            color: #475569;
            font-size: .8rem;
        }

        /* Media queries */
        @media (max-width: 1024px) {
            .section {
                padding: 64px 0;
            }

            .hero h1 {
                font-size: 2.5rem;
            }

            .nav-links {
                position: fixed;
                top: 64px;
                right: -100%;
                width: 300px;
                height: calc(100vh - 64px);
                background: rgba(5, 10, 21, .96);
                backdrop-filter: blur(24px);
                -webkit-backdrop-filter: blur(24px);
                flex-direction: column;
                justify-content: flex-start;
                padding: 32px 24px;
                gap: 8px;
                transition: right .35s ease;
                border-left: 1px solid rgba(255, 255, 255, .1);
                z-index: 99;
            }

            .nav-links.open {
                right: 0;
            }

            .nav-links .nav-link {
                font-size: 1.05rem;
                padding: 14px 16px;
                width: 100%;
                border-radius: 10px;
            }

            .nav-links .nav-link.active::after {
                display: none;
            }

            .nav-links .nav-link.active {
                background: rgba(34, 211, 238, .1);
                color: #67E8F9;
            }

            .nav-cta-mobile {
                display: flex !important;
                margin-top: 24px;
                width: 100%;
            }

            .nav-cta {
                display: none !important;
            }

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

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

            .feature-card.feature-main {
                background: rgba(255, 255, 255, .08);
                border-color: rgba(34, 211, 238, .3);
            }

            .scenario-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .scenario-grid.reverse .scenario-img {
                order: -1;
            }

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

            .price-grid {
                grid-template-columns: 1fr;
                max-width: 460px;
                margin: 0 auto;
            }

            .price-featured {
                order: -1;
            }

            .news-card {
                flex-direction: column;
                align-items: flex-start;
            }

            .news-thumb {
                width: 100%;
            }

            .news-thumb img {
                height: 180px;
            }

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

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

        @media (max-width: 640px) {
            body {
                padding-top: 56px;
            }

            .site-header {
                height: 56px;
            }

            .nav-wrap {
                height: 56px;
                gap: 12px;
                padding: 0 16px;
            }

            .brand-main {
                font-size: 1.2rem;
            }

            .brand-sub {
                font-size: .68rem;
            }

            .nav-links {
                top: 56px;
                width: 260px;
            }

            .container {
                padding: 0 16px;
            }

            .section {
                padding: 48px 0;
            }

            .hero {
                min-height: calc(88vh - 56px);
            }

            .hero h1 {
                font-size: 2rem;
                line-height: 1.25;
            }

            .hero-sub {
                font-size: 1rem;
            }

            .hero-buttons {
                flex-direction: column;
                align-items: center;
                gap: 12px;
            }

            .hero-buttons .btn-glow,
            .hero-buttons .btn-outline {
                width: 100%;
                max-width: 280px;
            }

            .hero-trust {
                gap: 12px;
                font-size: .78rem;
            }

            .section-title {
                font-size: 1.5rem;
            }

            .scenario-num {
                font-size: 2.4rem;
            }

            .scenario-content h3 {
                font-size: 1.2rem;
            }

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

            .stats-grid {
                grid-template-columns: 1fr;
                gap: 8px;
            }

            .stat-number {
                font-size: 2.2rem;
            }

            .stat-quote {
                padding: 20px;
            }

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

            .footer-bottom {
                font-size: .75rem;
            }

            .faq-item summary {
                font-size: .92rem;
                padding: 16px 18px;
            }

            .faq-answer {
                padding: 0 18px 18px;
                font-size: .88rem;
            }
        }

        @media (max-width: 375px) {
            .container {
                padding: 0 12px;
            }

            .brand-sub {
                display: none;
            }

            .hero h1 {
                font-size: 1.75rem;
            }
        }

/* roulang page: category1 */
:root {
        --bg-base: #050A15;
        --bg-panel: #0B1423;
        --primary: #22D3EE;
        --primary-hover: #67E8F9;
        --accent: #FB923C;
        --text-hi: #F1F5F9;
        --text-mid: #94A3B8;
        --text-low: #64748B;
        --radius-card: 12px;
        --radius-btn: 999px;
        --shadow-glow: 0 0 20px rgba(34, 211, 238, 0.4);
        --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.35);
    }

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

    html {
        scroll-behavior: smooth;
    }

    body {
        font-family: system-ui, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
        background: var(--bg-base);
        color: var(--text-hi);
        line-height: 1.75;
        -webkit-font-smoothing: antialiased;
    }

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

    a {
        color: inherit;
    }

    button,
    input {
        font-family: inherit;
    }

    .container {
        max-width: 1200px;
        margin: 0 auto;
        padding-left: 24px;
        padding-right: 24px;
    }

    .section-pad {
        padding: 72px 0;
    }

    @media (max-width: 768px) {
        .section-pad {
            padding: 48px 0;
        }
    }

    /* 导航栏 */
    .site-header {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        z-index: 50;
        height: 64px;
        background: rgba(2, 6, 23, 0.75);
        border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
    }

    .nav-wrap {
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: 64px;
    }

    .brand {
        display: inline-flex;
        align-items: baseline;
        gap: 8px;
        text-decoration: none;
        flex-shrink: 0;
    }

    .brand-main {
        font-size: 22px;
        font-weight: 800;
        color: #fff;
        letter-spacing: -0.01em;
        line-height: 1;
    }

    .brand-sub {
        font-size: 11px;
        color: rgba(255, 255, 255, 0.6);
        letter-spacing: 0.08em;
        line-height: 1;
    }

    .nav-links {
        display: flex;
        align-items: center;
        gap: 28px;
    }

    .nav-link {
        color: var(--text-mid);
        font-size: 15px;
        text-decoration: none;
        position: relative;
        padding: 8px 0;
        transition: color 0.2s;
        font-weight: 500;
    }

    .nav-link:hover {
        color: #fff;
    }

    .nav-link:focus-visible {
        outline: 2px solid var(--primary);
        outline-offset: 4px;
        border-radius: 4px;
    }

    .nav-link.active {
        color: #22D3EE;
    }

    .nav-link.active::after {
        content: "";
        position: absolute;
        left: 0;
        right: 0;
        bottom: 0;
        height: 2px;
        border-radius: 2px;
        background: linear-gradient(90deg, #22D3EE, #2DD4BF);
    }

    .nav-right {
        display: flex;
        align-items: center;
        gap: 16px;
    }

    .btn-glow {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 6px;
        background: linear-gradient(135deg, #22D3EE 0%, #14B8A6 100%);
        color: #062033;
        font-weight: 700;
        font-size: 14px;
        padding: 10px 22px;
        border-radius: var(--radius-btn);
        box-shadow: var(--shadow-glow);
        text-decoration: none;
        transition: all 0.25s ease;
        border: none;
        cursor: pointer;
        white-space: nowrap;
    }

    .btn-glow:hover {
        box-shadow: 0 0 30px rgba(34, 211, 238, 0.6);
        transform: translateY(-1px);
    }

    .btn-glow:focus-visible {
        outline: 2px solid #fff;
        outline-offset: 3px;
    }

    .btn-glow:active {
        transform: translateY(1px) scale(0.99);
        box-shadow: 0 0 14px rgba(34, 211, 238, 0.4);
    }

    .btn-glass {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 6px;
        background: rgba(255, 255, 255, 0.05);
        border: 1px solid rgba(255, 255, 255, 0.18);
        color: #E2E8F0;
        font-weight: 600;
        font-size: 14px;
        padding: 10px 22px;
        border-radius: var(--radius-btn);
        text-decoration: none;
        transition: all 0.25s ease;
        cursor: pointer;
    }

    .btn-glass:hover {
        background: rgba(255, 255, 255, 0.1);
        border-color: rgba(255, 255, 255, 0.3);
        color: #fff;
    }

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

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

    .nav-cta-mobile {
        display: none;
    }

    .nav-toggle {
        display: none;
        background: none;
        border: 0;
        color: #fff;
        cursor: pointer;
        padding: 8px;
        border-radius: 8px;
        transition: background 0.2s;
    }

    .nav-toggle:hover {
        background: rgba(255, 255, 255, 0.08);
    }

    .nav-toggle:focus-visible {
        outline: 2px solid var(--primary);
        outline-offset: 2px;
    }

    @media (max-width: 768px) {
        .nav-links {
            position: fixed;
            top: 64px;
            left: 0;
            right: 0;
            flex-direction: column;
            align-items: stretch;
            gap: 0;
            background: rgba(2, 6, 23, 0.96);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            padding: 16px 20px;
            transform: translateY(-120%);
            transition: transform 0.3s ease;
            z-index: 40;
        }

        .nav-links.open {
            transform: translateY(0);
        }

        .nav-link {
            padding: 14px 4px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

        .nav-link.active::after {
            display: none;
        }

        .nav-cta {
            display: none;
        }

        .nav-cta-mobile {
            display: inline-flex;
            margin-top: 16px;
            justify-content: center;
        }

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

    /* 页眉横幅 */
    .banner {
        position: relative;
        padding: 128px 0 76px;
        background: url('/assets/images/backpic/back-1.webp') center / cover no-repeat;
    }

    .banner::before {
        content: "";
        position: absolute;
        inset: 0;
        background: rgba(5, 10, 21, 0.72);
    }

    .banner::after {
        content: "";
        position: absolute;
        inset: 0;
        background: radial-gradient(ellipse at 20% 30%, rgba(34, 211, 238, 0.15), transparent 55%),
            linear-gradient(180deg, transparent 60%, rgba(5, 10, 21, 0.6) 100%);
    }

    .banner-content {
        position: relative;
        z-index: 2;
        max-width: 780px;
    }

    .badge-orange {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        background: rgba(251, 146, 60, 0.12);
        border: 1px solid rgba(251, 146, 60, 0.3);
        color: #FCD34D;
        font-size: 12px;
        padding: 4px 14px;
        border-radius: 999px;
        letter-spacing: 0.05em;
        line-height: 1.6;
    }

    .banner-title {
        font-size: 38px;
        font-weight: 800;
        line-height: 1.25;
        color: #fff;
        margin-top: 16px;
        letter-spacing: -0.02em;
    }

    .banner-desc {
        color: #C7D2E3;
        font-size: 17px;
        margin-top: 14px;
        max-width: 640px;
    }

    .banner-actions {
        display: flex;
        flex-wrap: wrap;
        gap: 16px;
        margin-top: 28px;
    }

    @media (max-width: 768px) {
        .banner {
            padding: 104px 0 56px;
        }

        .banner-title {
            font-size: 28px;
        }

        .banner-desc {
            font-size: 15px;
        }
    }

    /* 主内容与侧边栏布局 */
    .main-layout {
        display: grid;
        grid-template-columns: minmax(0, 1fr) 340px;
        gap: 44px;
        padding-top: 56px;
        padding-bottom: 72px;
        align-items: start;
    }

    @media (max-width: 1024px) {
        .main-layout {
            grid-template-columns: 1fr;
            gap: 36px;
        }
    }

    /* 板块标题 */
    .eyebrow {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        background: rgba(251, 146, 60, 0.1);
        border: 1px solid rgba(251, 146, 60, 0.3);
        color: #FCD34D;
        font-size: 12px;
        padding: 4px 14px;
        border-radius: 999px;
        letter-spacing: 0.06em;
        margin-bottom: 12px;
        font-weight: 600;
    }

    .section-title {
        font-size: 27px;
        font-weight: 800;
        color: #fff;
        line-height: 1.3;
        letter-spacing: -0.01em;
    }

    .section-desc {
        color: var(--text-mid);
        margin-top: 8px;
        font-size: 15px;
    }

    .section-head {
        margin-bottom: 28px;
    }

    /* 玻璃卡片 */
    .glass-card {
        background: rgba(255, 255, 255, 0.05);
        border: 1px solid rgba(255, 255, 255, 0.1);
        border-radius: var(--radius-card);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
        padding: 24px;
        box-shadow: var(--shadow-card);
        transition: border-color 0.3s, background 0.3s, transform 0.3s, box-shadow 0.3s;
    }

    .glass-card:hover {
        border-color: rgba(255, 255, 255, 0.25);
        background: rgba(255, 255, 255, 0.08);
        transform: translateY(-4px);
        box-shadow: 0 16px 40px rgba(0, 0, 0, 0.45);
    }

    .glass-card:active {
        transform: translateY(-2px) scale(0.99);
    }

    .icon-box {
        width: 48px;
        height: 48px;
        border-radius: 12px;
        display: flex;
        align-items: center;
        justify-content: center;
        background: rgba(34, 211, 238, 0.12);
        border: 1px solid rgba(34, 211, 238, 0.2);
        color: #22D3EE;
        flex-shrink: 0;
    }

    .feature-title {
        font-size: 17px;
        font-weight: 700;
        color: #fff;
        margin-top: 16px;
    }

    .feature-desc {
        color: var(--text-mid);
        font-size: 14px;
        margin-top: 8px;
        line-height: 1.75;
    }

    .feature-link {
        display: inline-flex;
        align-items: center;
        gap: 4px;
        color: #22D3EE;
        font-size: 14px;
        font-weight: 600;
        margin-top: 14px;
        text-decoration: none;
        transition: color 0.2s, gap 0.2s;
    }

    .feature-link:hover {
        color: #67E8F9;
        gap: 8px;
    }

    /* 流程步骤 */
    .step-list {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 20px;
        list-style: none;
    }

    .step-item {
        position: relative;
        padding: 20px 18px;
        background: rgba(255, 255, 255, 0.04);
        border: 1px solid rgba(255, 255, 255, 0.08);
        border-radius: 12px;
        transition: border-color 0.3s, transform 0.3s;
    }

    .step-item:hover {
        border-color: rgba(34, 211, 238, 0.35);
        transform: translateY(-3px);
    }

    .step-num {
        font-size: 32px;
        font-weight: 800;
        color: rgba(34, 211, 238, 0.35);
        line-height: 1;
    }

    .step-title {
        font-weight: 700;
        color: #fff;
        margin-top: 10px;
        font-size: 15px;
    }

    .step-desc {
        color: var(--text-mid);
        font-size: 13px;
        margin-top: 6px;
        line-height: 1.6;
    }

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

    @media (max-width: 520px) {
        .step-list {
            grid-template-columns: 1fr;
        }
    }

    /* 场景区块 */
    .scene-block {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 28px;
        align-items: center;
        margin-bottom: 40px;
    }

    .scene-block:last-child {
        margin-bottom: 0;
    }

    .scene-block.reverse .scene-media {
        order: 2;
    }

    .scene-media img {
        border-radius: 12px;
        border: 1px solid rgba(255, 255, 255, 0.1);
        box-shadow: var(--shadow-card);
        width: 100%;
        object-fit: cover;
        aspect-ratio: 4 / 3;
    }

    .scene-tag {
        display: inline-flex;
        align-items: center;
        background: rgba(251, 146, 60, 0.12);
        border: 1px solid rgba(251, 146, 60, 0.3);
        color: #FCD34D;
        font-size: 12px;
        padding: 3px 12px;
        border-radius: 999px;
        font-weight: 600;
        letter-spacing: 0.04em;
    }

    .scene-title {
        font-size: 21px;
        font-weight: 700;
        color: #fff;
        margin-top: 14px;
    }

    .scene-desc {
        color: var(--text-mid);
        font-size: 14px;
        margin-top: 10px;
        line-height: 1.8;
    }

    .scene-points {
        list-style: none;
        margin-top: 16px;
    }

    .scene-points li {
        display: flex;
        align-items: flex-start;
        gap: 10px;
        color: #C7D2E3;
        font-size: 14px;
        margin-bottom: 8px;
        line-height: 1.6;
    }

    .scene-points li span:first-child {
        color: #22D3EE;
        font-weight: 700;
        font-size: 13px;
        flex-shrink: 0;
    }

    @media (max-width: 768px) {
        .scene-block {
            grid-template-columns: 1fr;
            gap: 20px;
        }

        .scene-block.reverse .scene-media {
            order: 0;
        }
    }

    /* FAQ */
    .faq-item {
        background: rgba(255, 255, 255, 0.04);
        border: 1px solid rgba(255, 255, 255, 0.1);
        border-radius: 12px;
        margin-bottom: 14px;
        overflow: hidden;
        transition: border-color 0.2s;
    }

    .faq-item[open] {
        border-color: rgba(34, 211, 238, 0.35);
    }

    .faq-item summary {
        cursor: pointer;
        padding: 18px 22px;
        font-weight: 600;
        color: #fff;
        list-style: none;
        display: flex;
        justify-content: space-between;
        align-items: center;
        gap: 16px;
        font-size: 15px;
        line-height: 1.5;
        transition: color 0.2s;
    }

    .faq-item summary::-webkit-details-marker {
        display: none;
    }

    .faq-item summary::after {
        content: "+";
        font-size: 20px;
        color: #22D3EE;
        transition: transform 0.2s;
        flex-shrink: 0;
        line-height: 20px;
    }

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

    .faq-item summary:hover {
        color: #E2E8F0;
    }

    .faq-item summary:focus-visible {
        outline: none;
        box-shadow: inset 0 0 0 2px var(--primary);
    }

    .faq-answer {
        padding: 0 22px 18px;
        color: var(--text-mid);
        font-size: 14px;
        line-height: 1.75;
    }

    /* 侧边栏卡片 */
    .aside-card {
        background: rgba(255, 255, 255, 0.04);
        border: 1px solid rgba(255, 255, 255, 0.1);
        border-radius: 12px;
        padding: 22px;
        margin-bottom: 20px;
        box-shadow: var(--shadow-card);
    }

    .aside-card-title {
        font-size: 15px;
        font-weight: 700;
        color: #fff;
        margin-bottom: 14px;
        display: flex;
        align-items: center;
        gap: 8px;
    }

    .aside-card-title svg {
        color: #22D3EE;
    }

    .aside-link {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 14px 16px;
        background: rgba(255, 255, 255, 0.04);
        border: 1px solid rgba(255, 255, 255, 0.1);
        border-radius: 10px;
        text-decoration: none;
        color: #E2E8F0;
        font-size: 14px;
        font-weight: 600;
        transition: border-color 0.25s, background 0.25s, transform 0.25s;
    }

    .aside-link:hover {
        border-color: rgba(34, 211, 238, 0.4);
        background: rgba(34, 211, 238, 0.08);
        transform: translateX(3px);
    }

    .aside-link:active {
        transform: translateX(1px) scale(0.99);
    }

    .stat-grid {
        display: grid;
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .stat-item {
        padding: 14px 16px;
        background: rgba(255, 255, 255, 0.03);
        border-radius: 10px;
        border: 1px solid rgba(255, 255, 255, 0.06);
    }

    .stat-num {
        font-size: 26px;
        font-weight: 800;
        color: #22D3EE;
        text-shadow: 0 0 18px rgba(34, 211, 238, 0.5);
        line-height: 1.2;
    }

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

    .aside-service {
        display: flex;
        align-items: center;
        gap: 10px;
        color: var(--text-mid);
        font-size: 14px;
        margin-bottom: 10px;
    }

    .aside-service svg {
        color: #22D3EE;
        flex-shrink: 0;
    }

    /* CTA */
    .cta-section {
        padding: 76px 0;
        background: linear-gradient(180deg, rgba(5, 10, 21, 0) 0%, rgba(34, 211, 238, 0.08) 50%, rgba(5, 10, 21, 0) 100%),
            linear-gradient(180deg, transparent, rgba(255, 255, 255, 0.02));
        border-top: 1px solid rgba(255, 255, 255, 0.06);
        border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    }

    .cta-inner {
        text-align: center;
        max-width: 640px;
        margin: 0 auto;
    }

    .cta-title {
        font-size: 30px;
        font-weight: 800;
        color: #fff;
        line-height: 1.3;
    }

    .cta-desc {
        color: var(--text-mid);
        font-size: 15px;
        margin-top: 12px;
    }

    .cta-actions {
        display: flex;
        justify-content: center;
        gap: 16px;
        margin-top: 28px;
        flex-wrap: wrap;
    }

    /* 页脚 */
    .site-footer {
        background: #030711;
        border-top: 1px solid rgba(255, 255, 255, 0.08);
        padding: 56px 0 24px;
    }

    .footer-grid {
        display: grid;
        grid-template-columns: 1.4fr 0.8fr 1fr;
        gap: 40px;
        margin-bottom: 40px;
    }

    .footer-brand p {
        color: var(--text-mid);
        font-size: 14px;
        margin-top: 14px;
        line-height: 1.75;
    }

    .footer-title {
        font-weight: 700;
        margin-bottom: 14px;
        color: #fff;
        font-size: 15px;
    }

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

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

    .footer-links a {
        color: var(--text-mid);
        font-size: 14px;
        text-decoration: none;
        transition: color 0.2s;
    }

    .footer-links a:hover {
        color: #22D3EE;
    }

    .footer-contact p {
        display: flex;
        align-items: center;
        gap: 8px;
        color: var(--text-mid);
        font-size: 14px;
        margin-bottom: 10px;
    }

    .footer-contact svg {
        color: #22D3EE;
        flex-shrink: 0;
    }

    .footer-bottom {
        border-top: 1px solid rgba(255, 255, 255, 0.06);
        padding-top: 20px;
        text-align: center;
        color: var(--text-low);
        font-size: 13px;
    }

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

/* roulang page: article */
:root {
            --bg-base: #050A15;
            --bg-panel: #0B1220;
            --bg-card: rgba(255, 255, 255, 0.04);
            --bg-card-hover: rgba(255, 255, 255, 0.08);
            --primary: #22d3ee;
            --primary-hover: #67e8f9;
            --primary-soft: rgba(34, 211, 238, 0.12);
            --accent: #fb923c;
            --accent-soft: rgba(251, 146, 60, 0.12);
            --text-hi: #f1f5f9;
            --text-mid: #94a3b8;
            --text-low: #64748b;
            --border-light: rgba(255, 255, 255, 0.08);
            --border-mid: rgba(255, 255, 255, 0.16);
            --radius-sm: 8px;
            --radius-card: 12px;
            --radius-btn: 999px;
            --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.35);
            --shadow-glow: 0 0 20px rgba(34, 211, 238, 0.4);
            --shadow-glow-lg: 0 0 34px rgba(34, 211, 238, 0.6);
            --header-h: 64px;
            --font-sans: system-ui, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Helvetica Neue", Arial, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-base);
            background-image: radial-gradient(ellipse at 20% 0%, rgba(34, 211, 238, 0.06) 0%, transparent 55%),
                radial-gradient(ellipse at 80% 100%, rgba(251, 146, 60, 0.04) 0%, transparent 55%);
            color: var(--text-hi);
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
            padding-top: var(--header-h);
            overflow-x: hidden;
        }

        img {
            max-width: 100%;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
        }
        button {
            font-family: inherit;
            cursor: pointer;
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--header-h);
            background: rgba(5, 10, 21, 0.75);
            backdrop-filter: blur(24px);
            -webkit-backdrop-filter: blur(24px);
            border-bottom: 1px solid var(--border-light);
            z-index: 1000;
        }

        .nav-wrap {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-h);
            gap: 24px;
        }

        .brand {
            display: flex;
            align-items: baseline;
            gap: 6px;
            flex-shrink: 0;
            transition: opacity 0.2s ease;
        }
        .brand:hover {
            opacity: 0.85;
        }

        .brand-main {
            font-size: 22px;
            font-weight: 800;
            letter-spacing: -0.02em;
            background: linear-gradient(135deg, #ffffff 0%, var(--primary) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .brand-sub {
            font-size: 11px;
            color: rgba(255, 255, 255, 0.55);
            font-weight: 500;
            letter-spacing: 0.08em;
            white-space: nowrap;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 32px;
        }

        .nav-link {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-mid);
            position: relative;
            padding: 6px 2px;
            transition: color 0.25s ease;
            white-space: nowrap;
        }
        .nav-link:hover {
            color: var(--text-hi);
        }
        .nav-link::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: 0;
            width: 0;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transition: width 0.3s ease;
        }
        .nav-link:hover::after,
        .nav-link.active::after {
            width: 100%;
        }
        .nav-link.active {
            color: var(--primary);
        }

        .nav-right {
            display: flex;
            align-items: center;
            gap: 16px;
        }

        .btn-glow {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
            padding: 10px 22px;
            border-radius: var(--radius-btn);
            background: linear-gradient(135deg, var(--primary) 0%, #0ea5e9 100%);
            color: #041018;
            font-size: 14px;
            font-weight: 700;
            border: none;
            box-shadow: var(--shadow-glow);
            transition: all 0.3s ease;
            text-decoration: none;
            white-space: nowrap;
        }
        .btn-glow:hover {
            box-shadow: var(--shadow-glow-lg);
            transform: translateY(-1px);
            background: linear-gradient(135deg, var(--primary-hover) 0%, var(--primary) 100%);
        }
        .btn-glow:active {
            transform: translateY(1px) scale(0.98);
            box-shadow: 0 0 12px rgba(34, 211, 238, 0.3);
        }
        .btn-glow:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 3px;
        }

        .btn-ghost {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
            padding: 10px 22px;
            border-radius: var(--radius-btn);
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border-mid);
            color: var(--text-hi);
            font-size: 14px;
            font-weight: 600;
            transition: all 0.3s ease;
            backdrop-filter: blur(8px);
        }
        .btn-ghost:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 255, 255, 0.28);
        }
        .btn-ghost:active {
            transform: translateY(1px);
        }
        .btn-ghost:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 3px;
        }

        .nav-toggle {
            display: none;
            align-items: center;
            justify-content: center;
            width: 42px;
            height: 42px;
            background: transparent;
            border: 1px solid var(--border-light);
            border-radius: 10px;
            color: var(--text-hi);
            transition: all 0.3s ease;
        }
        .nav-toggle:hover {
            border-color: var(--border-mid);
            background: rgba(255, 255, 255, 0.05);
        }
        .nav-toggle:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        .nav-cta-mobile {
            display: none;
        }

        /* ===== Page Banner ===== */
        .page-banner {
            position: relative;
            min-height: 320px;
            display: flex;
            align-items: center;
            background-size: cover;
            background-position: center;
            border-bottom: 1px solid var(--border-light);
        }

        .banner-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(to bottom, rgba(5, 10, 21, 0.55) 0%, rgba(5, 10, 21, 0.75) 60%, var(--bg-base) 100%);
        }

        .banner-content {
            position: relative;
            z-index: 2;
            padding-top: 24px;
            padding-bottom: 72px;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 13px;
            color: var(--text-low);
            margin-bottom: 20px;
        }
        .breadcrumb a {
            color: var(--text-mid);
            transition: color 0.25s ease;
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb-sep {
            color: var(--text-low);
            opacity: 0.6;
        }
        .breadcrumb-current {
            color: var(--primary);
            max-width: 400px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        .banner-title {
            font-size: 34px;
            font-weight: 800;
            line-height: 1.3;
            letter-spacing: -0.02em;
            max-width: 800px;
            margin-bottom: 14px;
            color: #fff;
        }

        .banner-meta {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: var(--text-mid);
        }
        .meta-cat {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            background: var(--accent-soft);
            border: 1px solid rgba(251, 146, 60, 0.3);
            color: var(--accent);
            border-radius: 999px;
            padding: 3px 12px;
            font-size: 12px;
            font-weight: 600;
        }
        .meta-dot {
            color: var(--text-low);
        }
        .meta-date {
            color: var(--text-low);
        }

        /* ===== Article Main ===== */
        .article-main {
            padding: 0 0 60px;
        }

        .article-single {
            max-width: 860px;
            margin: 0 auto;
        }

        .article-card {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 48px;
            margin-top: -48px;
            position: relative;
            z-index: 5;
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
        }

        .article-content {
            font-size: 16px;
            line-height: 1.9;
            color: rgba(226, 232, 240, 0.92);
            word-break: break-word;
        }

        .article-content h1,
        .article-content h2 {
            font-size: 24px;
            font-weight: 700;
            color: #fff;
            padding-left: 16px;
            border-left: 4px solid var(--primary);
            margin: 40px 0 16px;
            line-height: 1.4;
        }

        .article-content h3 {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            margin: 32px 0 12px;
            line-height: 1.5;
        }

        .article-content h4 {
            font-size: 17px;
            font-weight: 600;
            color: var(--text-hi);
            margin: 24px 0 10px;
        }

        .article-content p {
            margin-bottom: 20px;
        }

        .article-content a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 3px;
            transition: color 0.2s ease;
        }
        .article-content a:hover {
            color: var(--primary-hover);
        }

        .article-content img {
            border-radius: 12px;
            border: 1px solid rgba(255, 255, 255, 0.1);
            margin: 28px 0;
            height: auto;
        }

        .article-content ul,
        .article-content ol {
            margin: 16px 0 24px;
            padding-left: 26px;
        }

        .article-content li {
            margin-bottom: 8px;
        }
        .article-content li::marker {
            color: var(--primary);
        }

        .article-content blockquote {
            border-left: 3px solid var(--primary);
            background: rgba(255, 255, 255, 0.04);
            padding: 18px 22px;
            border-radius: 0 12px 12px 0;
            margin: 28px 0;
            color: var(--text-mid);
            font-style: normal;
        }

        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 28px 0;
            font-size: 14px;
        }
        .article-content th {
            background: rgba(255, 255, 255, 0.06);
            color: var(--text-hi);
            font-weight: 600;
            text-align: left;
        }
        .article-content th,
        .article-content td {
            border: 1px solid var(--border-light);
            padding: 12px 14px;
        }
        .article-content tr:hover {
            background: rgba(255, 255, 255, 0.02);
        }

        /* Article footer tags & share */
        .article-foot {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 20px;
            margin-top: 44px;
            padding-top: 28px;
            border-top: 1px solid var(--border-light);
        }

        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .tag-chip {
            display: inline-flex;
            align-items: center;
            padding: 4px 14px;
            border-radius: 999px;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--border-light);
            color: var(--text-mid);
            font-size: 12px;
            font-weight: 500;
            transition: all 0.2s ease;
        }
        .tag-chip:hover {
            border-color: rgba(34, 211, 238, 0.4);
            color: var(--primary);
        }

        .share-row {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .share-label {
            font-size: 13px;
            color: var(--text-low);
        }

        .share-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--border-light);
            color: var(--text-mid);
            transition: all 0.25s ease;
        }
        .share-btn:hover {
            background: rgba(255, 255, 255, 0.12);
            color: var(--primary);
            border-color: rgba(34, 211, 238, 0.4);
            transform: translateY(-2px);
        }
        .share-btn:active {
            transform: translateY(0) scale(0.95);
        }
        .share-btn:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        /* Not found */
        .not-found-card {
            max-width: 680px;
            margin: 0 auto;
            background: var(--bg-card);
            border: 1px dashed rgba(255, 255, 255, 0.2);
            border-radius: var(--radius-card);
            padding: 64px 40px;
            text-align: center;
            backdrop-filter: blur(12px);
        }
        .not-found-title {
            font-size: 32px;
            font-weight: 800;
            margin-bottom: 12px;
            color: #fff;
        }
        .not-found-desc {
            color: var(--text-mid);
            margin-bottom: 28px;
            font-size: 15px;
        }

        /* ===== Related ===== */
        .related-section {
            padding: 64px 0 40px;
            border-top: 1px solid var(--border-light);
            background: rgba(255, 255, 255, 0.01);
        }

        .section-head {
            text-align: center;
            margin-bottom: 40px;
        }

        .section-eyebrow {
            display: inline-block;
            background: var(--accent-soft);
            border: 1px solid rgba(251, 146, 60, 0.3);
            color: var(--accent);
            font-size: 12px;
            font-weight: 700;
            border-radius: 999px;
            padding: 4px 14px;
            margin-bottom: 12px;
            letter-spacing: 0.02em;
        }

        .section-head h2 {
            font-size: 30px;
            font-weight: 800;
            color: #fff;
            line-height: 1.3;
        }

        .section-head p {
            color: var(--text-mid);
            font-size: 15px;
            margin-top: 6px;
        }

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

        .related-card {
            display: flex;
            flex-direction: column;
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: all 0.3s ease;
            height: 100%;
        }
        .related-card:hover {
            transform: translateY(-6px);
            border-color: var(--border-mid);
            box-shadow: 0 16px 40px rgba(0, 0, 0, 0.5);
        }
        .related-card:active {
            transform: translateY(-2px);
        }
        .related-card:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 3px;
        }

        .related-card img {
            width: 100%;
            height: 190px;
            object-fit: cover;
            border-bottom: 1px solid var(--border-light);
        }

        .related-body {
            padding: 22px 22px 24px;
            display: flex;
            flex-direction: column;
            gap: 8px;
            flex: 1;
        }

        .related-cat {
            display: inline-block;
            align-self: flex-start;
            background: var(--accent-soft);
            border: 1px solid rgba(251, 146, 60, 0.3);
            color: var(--accent);
            font-size: 11px;
            font-weight: 600;
            border-radius: 999px;
            padding: 2px 10px;
        }

        .related-body h3 {
            font-size: 17px;
            font-weight: 700;
            color: #fff;
            line-height: 1.5;
            transition: color 0.2s ease;
        }
        .related-card:hover .related-body h3 {
            color: var(--primary);
        }

        .related-body p {
            font-size: 14px;
            color: var(--text-mid);
            line-height: 1.7;
            flex: 1;
        }

        .related-date {
            font-size: 12px;
            color: var(--text-low);
        }

        /* Back link */
        .back-link-wrap {
            text-align: center;
            margin-top: 36px;
        }

        .back-link {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border-mid);
            color: var(--text-hi);
            font-size: 14px;
            font-weight: 600;
            transition: all 0.3s ease;
        }
        .back-link:hover {
            border-color: rgba(34, 211, 238, 0.4);
            color: var(--primary);
            background: var(--primary-soft);
            transform: translateX(-4px);
        }
        .back-link:active {
            transform: translateX(-2px) scale(0.98);
        }
        .back-link:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 3px;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 70px 0;
            background: linear-gradient(180deg, transparent 0%, rgba(34, 211, 238, 0.05) 50%, transparent 100%);
            border-top: 1px solid var(--border-light);
        }

        .cta-inner {
            max-width: 720px;
            margin: 0 auto;
            text-align: center;
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid var(--border-light);
            border-radius: 24px;
            padding: 56px 48px;
            backdrop-filter: blur(16px);
            box-shadow: var(--shadow-card);
            position: relative;
            overflow: hidden;
        }
        .cta-inner::before {
            content: "";
            position: absolute;
            top: -60px;
            left: 50%;
            transform: translateX(-50%);
            width: 240px;
            height: 240px;
            background: radial-gradient(circle, rgba(34, 211, 238, 0.18) 0%, transparent 70%);
            pointer-events: none;
        }

        .cta-inner h2 {
            font-size: 28px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
            position: relative;
        }

        .cta-inner p {
            color: var(--text-mid);
            font-size: 15px;
            margin-bottom: 28px;
            position: relative;
        }

        .cta-btn-row {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
            position: relative;
        }

        .btn-lg {
            padding: 15px 36px;
            font-size: 16px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-panel);
            border-top: 1px solid var(--border-light);
            padding-top: 56px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1.2fr;
            gap: 48px;
            padding-bottom: 40px;
        }

        .footer-brand p {
            color: var(--text-mid);
            font-size: 14px;
            margin-top: 16px;
            max-width: 340px;
            line-height: 1.8;
        }

        .footer-title {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-hi);
            margin-bottom: 16px;
        }

        .footer-links {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-links a {
            color: var(--text-mid);
            font-size: 14px;
            transition: color 0.25s ease;
        }
        .footer-links a:hover {
            color: var(--primary);
        }
        .footer-links a:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            border-radius: 4px;
        }

        .footer-contact {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .footer-contact p {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--text-mid);
            font-size: 14px;
        }
        .footer-contact svg {
            color: var(--primary);
            flex-shrink: 0;
        }

        .footer-bottom {
            border-top: 1px solid var(--border-light);
            padding: 18px 0;
            text-align: center;
        }
        .footer-bottom p {
            font-size: 12px;
            color: var(--text-low);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .nav-links {
                gap: 20px;
            }
            .related-grid {
                gap: 18px;
            }
            .related-card img {
                height: 170px;
            }
            .article-card {
                padding: 40px;
            }
        }

        @media (max-width: 768px) {
            .nav-toggle {
                display: inline-flex;
            }
            .nav-cta {
                display: none !important;
            }
            .nav-cta-mobile {
                display: inline-flex;
                margin-top: 8px;
                width: 100%;
                justify-content: center;
            }
            .nav-links {
                position: fixed;
                top: var(--header-h);
                right: 0;
                left: 0;
                flex-direction: column;
                align-items: stretch;
                background: rgba(5, 10, 21, 0.96);
                backdrop-filter: blur(24px);
                padding: 24px;
                gap: 16px;
                transform: translateY(-16px);
                opacity: 0;
                pointer-events: none;
                transition: all 0.3s ease;
                border-bottom: 1px solid var(--border-light);
                box-shadow: 0 24px 50px rgba(0, 0, 0, 0.5);
            }
            .nav-links.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-link {
                font-size: 16px;
                padding: 12px 8px;
                text-align: center;
                border-bottom: 1px solid var(--border-light);
            }
            .nav-link::after {
                display: none;
            }
            .nav-link.active {
                color: var(--primary);
                background: rgba(34, 211, 238, 0.08);
                border-radius: 8px;
            }

            .banner-title {
                font-size: 26px;
            }
            .page-banner {
                min-height: 260px;
            }

            .article-card {
                padding: 28px 22px;
                margin-top: -32px;
                border-radius: 12px;
            }

            .article-content {
                font-size: 15px;
                line-height: 1.85;
            }
            .article-content h2 {
                font-size: 21px;
            }
            .article-content h3 {
                font-size: 18px;
            }

            .article-foot {
                flex-direction: column;
                align-items: flex-start;
            }

            .related-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .related-card img {
                height: 200px;
            }

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

            .cta-inner {
                padding: 40px 24px;
                border-radius: 18px;
            }
            .cta-inner h2 {
                font-size: 24px;
            }
            .cta-btn-row {
                flex-direction: column;
                align-items: center;
            }
            .cta-btn-row .btn-glow,
            .cta-btn-row .btn-ghost {
                width: 100%;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .brand-main {
                font-size: 19px;
            }
            .brand-sub {
                font-size: 10px;
            }
            .banner-title {
                font-size: 22px;
            }
            .breadcrumb {
                font-size: 12px;
            }
            .article-card {
                padding: 22px 16px;
            }
            .article-content h2 {
                font-size: 19px;
            }
            .article-content h3 {
                font-size: 17px;
            }
            .section-head h2 {
                font-size: 24px;
            }
            .related-card img {
                height: 180px;
            }
            .footer-grid {
                gap: 28px;
            }
        }

        /* Focus accessibility */
        a:focus-visible,
        button:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 3px;
        }

/* roulang page: category2 */
:root {
            --bg-base: #050A15;
            --bg-panel: #0B1322;
            --primary: #22d3ee;
            --primary-hover: #67e8f9;
            --accent: #fb923c;
            --text-hi: #F1F5F9;
            --text-mid: #94A3B8;
            --text-low: #64748B;
            --radius-card: 12px;
            --radius-btn: 999px;
            --shadow-glow: 0 0 20px rgba(34, 211, 238, 0.4);
            --shadow-glow-hover: 0 0 30px rgba(34, 211, 238, 0.6);
            --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.35);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: system-ui, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
            background: var(--bg-base);
            color: var(--text-hi);
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }

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

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

        button {
            font: inherit;
            cursor: pointer;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        a:focus-visible,
        button:focus-visible,
        summary:focus-visible {
            outline: 2px solid #22d3ee;
            outline-offset: 3px;
            border-radius: 6px;
        }

        /* ===== 导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            height: 64px;
            background: rgba(5, 10, 21, 0.72);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            transition: box-shadow .3s;
        }

        .nav-wrap {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
            gap: 24px;
        }

        .brand {
            display: flex;
            align-items: baseline;
            gap: 8px;
            flex-shrink: 0;
        }

        .brand-main {
            font-size: 22px;
            font-weight: 800;
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, #22d3ee, #2dd4bf);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .brand-sub {
            font-size: 12px;
            color: rgba(255, 255, 255, 0.6);
            font-weight: 500;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 28px;
        }

        .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.75);
            padding: 8px 2px;
            position: relative;
            transition: color .25s;
        }

        .nav-link:hover {
            color: #fff;
        }

        .nav-link.active {
            color: #22d3ee;
        }

        .nav-link.active::after {
            content: "";
            position: absolute;
            left: 0;
            right: 0;
            bottom: 0;
            height: 2px;
            border-radius: 2px;
            background: #22d3ee;
            box-shadow: 0 0 8px rgba(34, 211, 238, 0.6);
        }

        .nav-right {
            display: flex;
            align-items: center;
            gap: 16px;
        }

        .btn-glow {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            height: 40px;
            padding: 0 22px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 700;
            color: #050A15;
            background: linear-gradient(135deg, #22d3ee, #2dd4bf);
            box-shadow: 0 0 20px rgba(34, 211, 238, 0.4);
            transition: all .25s;
            border: none;
            white-space: nowrap;
        }

        .btn-glow:hover {
            box-shadow: 0 0 30px rgba(34, 211, 238, 0.6);
            transform: translateY(-1px);
        }

        .btn-glow:active {
            transform: translateY(1px) scale(0.97);
        }

        .btn-ghost {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            height: 40px;
            padding: 0 22px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 600;
            color: rgba(255, 255, 255, 0.85);
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.2);
            transition: all .25s;
            white-space: nowrap;
        }

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

        .btn-ghost:active {
            transform: translateY(1px) scale(0.97);
        }

        .nav-cta-mobile {
            display: none;
        }

        .nav-toggle {
            display: none;
            background: none;
            border: 1px solid rgba(255, 255, 255, 0.2);
            color: #fff;
            width: 40px;
            height: 40px;
            border-radius: 10px;
            align-items: center;
            justify-content: center;
            transition: all .25s;
        }

        .nav-toggle:hover {
            border-color: rgba(255, 255, 255, 0.4);
            background: rgba(255, 255, 255, 0.08);
        }

        @media (max-width: 768px) {
            .nav-links {
                position: fixed;
                top: 64px;
                left: 0;
                right: 0;
                background: rgba(5, 10, 21, 0.96);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                flex-direction: column;
                align-items: stretch;
                padding: 20px 24px 80px;
                gap: 4px;
                border-bottom: 1px solid rgba(255, 255, 255, 0.1);
                transform: translateY(-140%);
                transition: transform .35s ease;
                z-index: 99;
                box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
            }

            .nav-links.open {
                transform: translateY(0);
            }

            .nav-links .nav-link {
                padding: 14px 4px;
                font-size: 16px;
                border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            }

            .nav-link.active::after {
                display: none;
            }

            .nav-link.active {
                color: #22d3ee;
            }

            .nav-cta-mobile {
                display: inline-flex;
                margin-top: 16px;
            }

            .nav-toggle {
                display: inline-flex;
                align-items: center;
                justify-content: center;
            }

            .nav-cta {
                display: none;
            }
        }

        /* ===== 页眉横幅 ===== */
        .page-banner {
            position: relative;
            min-height: 340px;
            display: flex;
            align-items: center;
            padding: 120px 0 64px;
            background-size: cover;
            background-position: center;
            overflow: hidden;
        }

        .page-banner::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(100deg, rgba(5, 10, 21, 0.88) 0%, rgba(5, 10, 21, 0.72) 55%, rgba(5, 10, 21, 0.55) 100%);
            z-index: 1;
        }

        .page-banner .container {
            position: relative;
            z-index: 2;
        }

        .banner-eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(251, 146, 60, 0.15);
            border: 1px solid rgba(251, 146, 60, 0.3);
            color: #fdba74;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: 999px;
            margin-bottom: 16px;
        }

        .page-banner h1 {
            font-size: clamp(32px, 5vw, 46px);
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 14px;
            color: #fff;
            letter-spacing: -0.5px;
        }

        .page-banner-desc {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.72);
            max-width: 620px;
            line-height: 1.8;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
            margin-bottom: 18px;
        }

        .breadcrumb a {
            color: rgba(255, 255, 255, 0.6);
            transition: color .2s;
        }

        .breadcrumb a:hover {
            color: #22d3ee;
        }

        .breadcrumb span:last-child {
            color: #22d3ee;
        }

        /* ===== 板块 ===== */
        .section {
            padding: 84px 0;
        }

        .section-alt {
            background: rgba(255, 255, 255, 0.02);
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }

        .section-header {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 52px;
        }

        .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: #fdba74;
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 0.1em;
            margin-bottom: 10px;
        }

        .eyebrow::before {
            content: "/";
            color: #fb923c;
            font-weight: 900;
            font-size: 16px;
        }

        .section-header h2 {
            font-size: clamp(26px, 3.4vw, 34px);
            font-weight: 800;
            color: #fff;
            line-height: 1.3;
            margin-bottom: 10px;
            letter-spacing: -0.3px;
        }

        .section-header p {
            color: rgba(255, 255, 255, 0.55);
            font-size: 15px;
        }

        /* ===== 卡片 ===== */
        .glass-card {
            background: rgba(255, 255, 255, 0.05);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-card);
            padding: 28px;
            box-shadow: var(--shadow-card);
            transition: all .3s;
        }

        .glass-card:hover {
            background: rgba(255, 255, 255, 0.09);
            border-color: rgba(255, 255, 255, 0.22);
            transform: translateY(-4px);
            box-shadow: 0 16px 44px rgba(0, 0, 0, 0.5);
        }

        .icon-circle {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            border-radius: 14px;
            background: rgba(34, 211, 238, 0.12);
            border: 1px solid rgba(34, 211, 238, 0.25);
            color: #22d3ee;
            margin-bottom: 18px;
            transition: all .3s;
        }

        .glass-card:hover .icon-circle {
            background: rgba(34, 211, 238, 0.2);
            border-color: rgba(34, 211, 238, 0.5);
            box-shadow: 0 0 16px rgba(34, 211, 238, 0.2);
        }

        .card-title {
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
        }

        .card-desc {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.58);
            line-height: 1.75;
        }

        .badge {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            background: rgba(251, 146, 60, 0.15);
            border: 1px solid rgba(251, 146, 60, 0.3);
            color: #fdba74;
            font-size: 12px;
            font-weight: 600;
            padding: 3px 12px;
            border-radius: 999px;
        }

        .card-link {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            margin-top: 14px;
            font-size: 13px;
            font-weight: 600;
            color: #22d3ee;
            transition: gap .2s;
        }

        .card-link:hover {
            gap: 8px;
        }

        /* ===== 两栏布局 ===== */
        .split-layout {
            display: grid;
            grid-template-columns: 1fr 360px;
            gap: 36px;
            align-items: start;
        }

        .content-list {
            margin-top: 18px;
            display: grid;
            gap: 12px;
        }

        .content-list li {
            display: flex;
            gap: 12px;
            font-size: 15px;
            color: rgba(255, 255, 255, 0.75);
            line-height: 1.7;
            padding: 12px 16px;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: 10px;
            transition: all .2s;
        }

        .content-list li:hover {
            border-color: rgba(34, 211, 238, 0.3);
            background: rgba(34, 211, 238, 0.04);
        }

        .content-list .mark {
            color: #22d3ee;
            font-weight: 800;
            flex-shrink: 0;
        }

        .sidebar-card {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 12px;
            padding: 24px;
            margin-bottom: 20px;
        }

        .sidebar-card h3 {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
            padding-bottom: 10px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .sidebar-link {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 10px 0;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            transition: all .2s;
        }

        .sidebar-link:hover {
            color: #22d3ee;
            padding-left: 4px;
        }

        .sidebar-contact p {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.65);
            margin-bottom: 12px;
        }

        .sidebar-contact svg {
            color: #22d3ee;
            flex-shrink: 0;
        }

        /* ===== 安全要点网格 ===== */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .feature-grid .wide-card {
            grid-column: span 2;
        }

        @media (max-width: 1024px) {
            .feature-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .feature-grid .wide-card {
                grid-column: span 1;
            }
        }

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

        /* ===== 场景交错 ===== */
        .scene-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
            margin-bottom: 72px;
        }

        .scene-row:last-child {
            margin-bottom: 0;
        }

        .scene-media img {
            width: 100%;
            height: 320px;
            object-fit: cover;
            border-radius: 16px;
            border: 1px solid rgba(255, 255, 255, 0.1);
            box-shadow: 0 24px 60px rgba(0, 0, 0, 0.5);
            transition: transform .4s;
        }

        .scene-media:hover img {
            transform: scale(1.015);
        }

        .scene-text .scene-label {
            font-size: 13px;
            font-weight: 700;
            color: #fb923c;
            margin-bottom: 8px;
        }

        .scene-text h3 {
            font-size: 24px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 14px;
        }

        .scene-list {
            margin-top: 14px;
            display: grid;
            gap: 10px;
        }

        .scene-list li {
            display: flex;
            gap: 12px;
            font-size: 15px;
            color: rgba(255, 255, 255, 0.7);
            line-height: 1.7;
        }

        .scene-num {
            font-size: 13px;
            font-weight: 800;
            color: #22d3ee;
            flex-shrink: 0;
            font-variant-numeric: tabular-nums;
        }

        @media (max-width: 768px) {
            .scene-row {
                grid-template-columns: 1fr;
                gap: 28px;
                margin-bottom: 52px;
            }

            .scene-media img {
                height: 220px;
            }
        }

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

        .step-card {
            text-align: center;
            padding: 36px 20px 30px;
            position: relative;
        }

        .step-num {
            font-size: 44px;
            font-weight: 900;
            line-height: 1;
            color: rgba(251, 146, 60, 0.85);
            margin-bottom: 14px;
            font-variant-numeric: tabular-nums;
            text-shadow: 0 0 20px rgba(251, 146, 60, 0.25);
        }

        .step-title {
            font-size: 17px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 6px;
        }

        .step-desc {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.55);
            line-height: 1.7;
        }

        .step-arrow {
            position: absolute;
            top: 50%;
            right: -14px;
            transform: translateY(-50%);
            color: rgba(34, 211, 238, 0.4);
            font-size: 20px;
            z-index: 2;
        }

        @media (max-width: 900px) {
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }

            .step-arrow {
                display: none;
            }
        }

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

        /* ===== FAQ ===== */
        .faq-wrap {
            max-width: 820px;
            margin: 0 auto;
        }

        .faq-item {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 12px;
            margin-bottom: 14px;
            overflow: hidden;
            transition: all .3s;
        }

        .faq-item:hover {
            border-color: rgba(255, 255, 255, 0.22);
        }

        .faq-item[open] {
            border-color: rgba(34, 211, 238, 0.35);
            background: rgba(34, 211, 238, 0.04);
        }

        .faq-item summary {
            padding: 20px 24px;
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            cursor: pointer;
            list-style: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            transition: color .2s;
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary:hover {
            color: #67e8f9;
        }

        .faq-item summary::after {
            content: "+";
            font-size: 24px;
            font-weight: 400;
            color: #22d3ee;
            transition: transform .3s;
            flex-shrink: 0;
            line-height: 1;
        }

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

        .faq-body {
            padding: 0 24px 22px;
            color: rgba(255, 255, 255, 0.62);
            font-size: 14px;
            line-height: 1.85;
        }

        /* ===== CTA ===== */
        .cta-section {
            position: relative;
            padding: 100px 0;
            text-align: center;
            background-size: cover;
            background-position: center;
            overflow: hidden;
        }

        .cta-section::before {
            content: "";
            position: absolute;
            inset: 0;
            background: rgba(5, 10, 21, 0.86);
            z-index: 1;
        }

        .cta-section .container {
            position: relative;
            z-index: 2;
        }

        .cta-section h2 {
            font-size: clamp(28px, 4vw, 40px);
            font-weight: 800;
            color: #fff;
            margin-bottom: 14px;
            letter-spacing: -0.5px;
        }

        .cta-section p {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.65);
            max-width: 600px;
            margin: 0 auto 32px;
            line-height: 1.8;
        }

        .cta-btns {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: #02060F;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 64px 0 28px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-brand p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.5);
            line-height: 1.8;
            margin-top: 14px;
            max-width: 340px;
        }

        .footer-title {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }

        .footer-links {
            list-style: none;
            display: grid;
            gap: 10px;
        }

        .footer-links a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            transition: all .2s;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .footer-links a:hover {
            color: #22d3ee;
            padding-left: 4px;
        }

        .footer-contact p {
            display: flex;
            align-items: flex-start;
            gap: 8px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 12px;
            line-height: 1.6;
        }

        .footer-contact svg {
            color: #22d3ee;
            flex-shrink: 0;
            margin-top: 3px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 24px;
            text-align: center;
        }

        .footer-bottom p {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.35);
        }

        @media (max-width: 900px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }

            .footer-brand {
                grid-column: span 2;
            }
        }

        @media (max-width: 600px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .footer-brand {
                grid-column: span 1;
            }
        }

        /* ===== 响应式整体 ===== */
        @media (max-width: 1024px) {
            .split-layout {
                grid-template-columns: 1fr 300px;
                gap: 28px;
            }
        }

        @media (max-width: 820px) {
            .split-layout {
                grid-template-columns: 1fr;
            }

            .sidebar-sticky {
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }

            .sidebar-card {
                margin-bottom: 0;
            }
        }

        @media (max-width: 560px) {
            .section {
                padding: 60px 0;
            }

            .sidebar-sticky {
                grid-template-columns: 1fr;
            }
        }