/* roulang page: index */
:root {
            --bg-primary: #0A1628;
            --bg-secondary: #0B1526;
            --bg-dark: #060D1A;
            --accent: #00D9FF;
            --accent-rgb: 0, 217, 255;
            --accent-gradient: linear-gradient(135deg, #00D9FF, #3B82F6);
            --purple: #7B61FF;
            --purple-rgb: 123, 97, 255;
            --text-primary: #E8F0FA;
            --text-secondary: #94A3B8;
            --text-muted: #64748B;
            --glass-bg: rgba(255, 255, 255, 0.06);
            --glass-border: rgba(255, 255, 255, 0.12);
            --radius-btn: 10px;
            --radius-card: 12px;
            --radius-lg: 16px;
            --radius-pill: 999px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.35);
            --shadow-hover: 0 12px 40px rgba(0, 217, 255, 0.15);
            --shadow-btn: 0 0 24px rgba(0, 217, 255, 0.35);
            --font-main: "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
            --font-mono: "JetBrains Mono", Consolas, monospace;
            --container-width: 1200px;
            --space-section: 96px;
            --space-section-md: 72px;
            --space-section-sm: 56px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-main);
            background: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

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

        a {
            color: var(--accent);
            text-decoration: none;
            transition: color 0.3s;
        }

        a:hover {
            color: #66eaff;
        }

        button,
        input {
            font-family: inherit;
            border: none;
            outline: none;
        }

        :focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

        .container {
            max-width: var(--container-width);
            margin: 0 auto;
            padding: 0 20px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 14px;
            font-weight: 600;
            padding: 14px 28px;
            border-radius: var(--radius-btn);
            cursor: pointer;
            transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            white-space: nowrap;
        }

        .btn-primary {
            background: var(--accent-gradient);
            color: #FFFFFF;
            box-shadow: var(--shadow-btn);
            border: none;
        }

        .btn-primary:hover {
            box-shadow: 0 0 36px rgba(0, 217, 255, 0.55);
            transform: translateY(-2px);
            color: #FFFFFF;
        }

        .btn-primary:active {
            transform: translateY(1px);
            box-shadow: 0 0 18px rgba(0, 217, 255, 0.3);
        }

        .btn-secondary {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.2);
            color: var(--text-primary);
        }

        .btn-secondary:hover {
            border-color: var(--accent);
            background: rgba(255, 255, 255, 0.12);
            color: var(--accent);
            transform: translateY(-2px);
        }

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

        .section {
            padding: var(--space-section) 0;
        }

        .section-md {
            padding: var(--space-section-md) 0;
        }

        .section-title {
            font-size: 32px;
            font-weight: 700;
            text-align: center;
            margin-bottom: 12px;
            line-height: 1.3;
            letter-spacing: -0.5px;
        }

        .section-subtitle {
            text-align: center;
            color: var(--text-secondary);
            font-size: 16px;
            max-width: 640px;
            margin: 0 auto 48px;
            line-height: 1.6;
        }

        /* ===== Header ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(10, 22, 40, 0.85);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .header-top {
            padding: 12px 0;
        }

        .header-top .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
        }

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

        .logo-icon {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: var(--accent-gradient);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: #fff;
            box-shadow: 0 0 20px rgba(0, 217, 255, 0.3);
            flex-shrink: 0;
        }

        .brand-text {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }

        .header-search {
            display: flex;
            align-items: center;
            flex: 1;
            max-width: 440px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-pill);
            padding: 0 6px;
            height: 40px;
            transition: border-color 0.3s, box-shadow 0.3s;
        }

        .header-search:focus-within {
            border-color: var(--accent);
            box-shadow: 0 0 16px rgba(0, 217, 255, 0.2);
        }

        .header-search input {
            flex: 1;
            background: transparent;
            border: none;
            color: var(--text-primary);
            font-size: 14px;
            padding: 0 14px;
        }

        .header-search input::placeholder {
            color: var(--text-muted);
        }

        .header-search .search-btn {
            width: 34px;
            height: 34px;
            border-radius: 50%;
            background: transparent;
            color: var(--text-secondary);
            font-size: 14px;
            cursor: pointer;
            transition: all 0.3s;
        }

        .header-search .search-btn:hover {
            color: var(--accent);
            background: rgba(0, 217, 255, 0.1);
        }

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

        .menu-toggle {
            display: none;
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: rgba(255, 255, 255, 0.08);
            color: var(--text-primary);
            font-size: 18px;
            cursor: pointer;
            align-items: center;
            justify-content: center;
            border: 1px solid rgba(255, 255, 255, 0.1);
            transition: background 0.3s;
        }

        .menu-toggle:hover {
            background: rgba(255, 255, 255, 0.15);
        }

        .channel-nav {
            border-top: 1px solid rgba(255, 255, 255, 0.04);
        }

        .channel-tabs {
            display: flex;
            list-style: none;
            gap: 0;
            padding: 0;
            margin: 0;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
        }

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

        .channel-tabs a {
            display: block;
            padding: 12px 20px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            border-bottom: 2px solid transparent;
            transition: all 0.3s;
            white-space: nowrap;
            position: relative;
        }

        .channel-tabs a:hover {
            color: var(--text-primary);
        }

        .channel-tabs a.active {
            color: var(--accent);
            border-bottom-color: var(--accent);
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            padding: 100px 0 80px;
            background: linear-gradient(180deg, #0A1628 0%, #0D1F3C 100%);
            overflow: hidden;
        }

        .hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.35;
        }

        .hero-overlay {
            position: absolute;
            inset: 0;
            background: radial-gradient(circle at 70% 20%, rgba(0, 217, 255, 0.15), transparent 60%);
        }

        .hero-grid-line {
            position: absolute;
            inset: 0;
            background-image: linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
            background-size: 48px 48px;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 900px;
            margin: 0 auto;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(0, 217, 255, 0.1);
            border: 1px solid rgba(0, 217, 255, 0.3);
            color: var(--accent);
            font-size: 13px;
            padding: 6px 16px;
            border-radius: var(--radius-pill);
            margin-bottom: 28px;
            backdrop-filter: blur(8px);
        }

        .hero h1 {
            font-size: 56px;
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: -1px;
            color: #FFFFFF;
            margin-bottom: 20px;
        }

        .hero-subtitle {
            font-size: 18px;
            color: var(--text-secondary);
            max-width: 560px;
            margin: 0 auto 32px;
            line-height: 1.6;
        }

        .hero-cta {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
            margin-bottom: 50px;
        }

        .countdown-bar {
            display: inline-flex;
            align-items: center;
            gap: 18px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: var(--radius-pill);
            padding: 12px 32px;
            backdrop-filter: blur(16px);
            box-shadow: var(--shadow-card);
            margin: 0 auto 20px;
        }

        .countdown-label {
            font-size: 14px;
            color: var(--text-secondary);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .countdown-label i {
            color: var(--accent);
        }

        .countdown-items {
            display: flex;
            gap: 8px;
            align-items: center;
        }

        .countdown-item {
            text-align: center;
            min-width: 62px;
            background: rgba(0, 0, 0, 0.3);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 10px;
            padding: 8px 10px;
        }

        .countdown-item .num {
            font-family: var(--font-mono);
            font-size: 28px;
            font-weight: 700;
            color: var(--accent);
            text-shadow: 0 0 12px rgba(0, 217, 255, 0.5);
            display: block;
            line-height: 1.2;
        }

        .countdown-item .unit {
            font-size: 11px;
            color: var(--text-muted);
            margin-top: 2px;
            display: block;
        }

        .countdown-note {
            font-size: 13px;
            color: var(--text-muted);
            text-align: center;
            margin-top: 8px;
        }

        .hero-scroll {
            position: absolute;
            bottom: 24px;
            left: 50%;
            transform: translateX(-50%);
            color: var(--text-muted);
            font-size: 20px;
            animation: floatDown 2s ease-in-out infinite;
            z-index: 2;
        }

        @keyframes floatDown {
            0%,
            100% {
                transform: translateX(-50%) translateY(0);
            }
            50% {
                transform: translateX(-50%) translateY(8px);
            }
        }

        /* ===== Features ===== */
        .features-section {
            background: var(--bg-primary);
            position: relative;
        }

        .features-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
            max-width: 880px;
            margin: 0 auto;
        }

        .feature-card {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-card);
            padding: 32px 28px;
            position: relative;
            backdrop-filter: blur(16px);
            transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            overflow: hidden;
            box-shadow: var(--shadow-card);
        }

        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 4px;
            height: 40px;
            background: linear-gradient(135deg, #00D9FF, #7B61FF);
            border-radius: 0 4px 4px 0;
        }

        .feature-card:nth-child(2),
        .feature-card:nth-child(4) {
            transform: translateY(24px);
        }

        .feature-card:hover {
            transform: translateY(4px) scale(1.02);
            border-color: rgba(0, 217, 255, 0.3);
            box-shadow: var(--shadow-hover);
        }

        .feature-card:nth-child(2):hover,
        .feature-card:nth-child(4):hover {
            transform: translateY(24px) scale(1.02);
        }

        .feature-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: linear-gradient(135deg, rgba(0, 217, 255, 0.15), rgba(123, 97, 255, 0.15));
            border: 1px solid rgba(0, 217, 255, 0.2);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: var(--accent);
            margin-bottom: 20px;
            transition: all 0.3s;
        }

        .feature-card:hover .feature-icon {
            box-shadow: 0 0 20px rgba(0, 217, 255, 0.3);
            transform: scale(1.05);
        }

        .feature-card h3 {
            font-size: 18px;
            font-weight: 600;
            color: #FFFFFF;
            margin-bottom: 10px;
        }

        .feature-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ===== Gallery ===== */
        .gallery-section {
            background: var(--bg-secondary);
            position: relative;
        }

        .gallery-grid {
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 24px;
        }

        .gallery-main {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            height: 320px;
            cursor: pointer;
            box-shadow: var(--shadow-card);
        }

        .gallery-main img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.6s ease;
        }

        .gallery-main:hover img {
            transform: scale(1.05);
        }

        .gallery-side {
            display: grid;
            grid-template-rows: 1fr 1fr;
            gap: 24px;
        }

        .gallery-side-item {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            height: 148px;
            cursor: pointer;
            box-shadow: var(--shadow-card);
        }

        .gallery-side-item img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.6s ease;
        }

        .gallery-side-item:hover img {
            transform: scale(1.05);
        }

        .gallery-overlay {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            padding: 20px;
            background: linear-gradient(transparent, rgba(0, 0, 0, 0.6));
            z-index: 1;
        }

        .gallery-tag {
            display: inline-block;
            background: rgba(255, 255, 255, 0.15);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.2);
            color: #fff;
            font-size: 12px;
            padding: 4px 14px;
            border-radius: var(--radius-pill);
            font-weight: 500;
        }

        .gallery-main .gallery-overlay {
            padding: 24px;
        }

        .gallery-main .gallery-tag {
            font-size: 14px;
            padding: 6px 18px;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 0 0 var(--space-section);
            background: var(--bg-primary);
        }

        .cta-banner {
            position: relative;
            border-radius: var(--radius-lg);
            padding: 56px 48px;
            background: linear-gradient(135deg, rgba(0, 217, 255, 0.08), rgba(123, 97, 255, 0.08));
            border: 1px solid rgba(0, 217, 255, 0.2);
            backdrop-filter: blur(20px);
            text-align: center;
            overflow: hidden;
        }

        .cta-banner::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(0, 217, 255, 0.5), transparent);
        }

        .cta-banner h2 {
            font-size: 30px;
            font-weight: 700;
            margin-bottom: 12px;
            color: #FFFFFF;
        }

        .cta-banner p {
            color: var(--text-secondary);
            font-size: 16px;
            max-width: 480px;
            margin: 0 auto 32px;
        }

        .cta-form {
            display: flex;
            gap: 12px;
            justify-content: center;
            align-items: center;
            max-width: 480px;
            margin: 0 auto;
            flex-wrap: wrap;
        }

        .cta-form .input-wrap {
            position: relative;
            flex: 1;
            min-width: 220px;
        }

        .cta-form input {
            width: 100%;
            height: 46px;
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: 10px;
            padding: 0 16px 0 42px;
            color: var(--text-primary);
            font-size: 14px;
            transition: all 0.3s;
        }

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

        .cta-form input:focus {
            border-color: var(--accent);
            box-shadow: 0 0 16px rgba(0, 217, 255, 0.25);
            background: rgba(255, 255, 255, 0.12);
        }

        .cta-form .input-wrap i {
            position: absolute;
            left: 16px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--text-muted);
            font-size: 14px;
            z-index: 1;
        }

        .cta-banner .btn {
            height: 46px;
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--bg-secondary);
        }

        .faq-list {
            max-width: 860px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .faq-item {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-card);
            overflow: hidden;
            transition: border-color 0.3s, box-shadow 0.3s;
            backdrop-filter: blur(16px);
        }

        .faq-item.open {
            border-color: rgba(0, 217, 255, 0.3);
            box-shadow: var(--shadow-hover);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 24px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 500;
            color: #FFFFFF;
            user-select: none;
            transition: background 0.3s;
        }

        .faq-question:hover {
            background: rgba(255, 255, 255, 0.04);
        }

        .faq-question .faq-icon {
            font-size: 14px;
            color: var(--text-secondary);
            transition: transform 0.4s, color 0.3s;
            width: 24px;
            height: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            flex-shrink: 0;
        }

        .faq-item.open .faq-icon {
            transform: rotate(180deg);
            color: var(--accent);
            background: rgba(0, 217, 255, 0.1);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease;
        }

        .faq-answer-inner {
            padding: 0 24px 20px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            background: rgba(255, 255, 255, 0.03);
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            padding-top: 16px;
            margin: 0;
        }

        /* ===== News / CMS List ===== */
        .news-section {
            background: var(--bg-primary);
        }

        .news-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
            max-width: 920px;
            margin: 0 auto;
        }

        .news-card {
            display: flex;
            gap: 20px;
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-card);
            padding: 16px;
            transition: all 0.35s;
            backdrop-filter: blur(16px);
            box-shadow: var(--shadow-card);
            align-items: flex-start;
        }

        .news-card:hover {
            border-color: rgba(0, 217, 255, 0.3);
            background: rgba(255, 255, 255, 0.09);
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
        }

        .news-thumb {
            width: 120px;
            height: 80px;
            border-radius: 8px;
            overflow: hidden;
            flex-shrink: 0;
        }

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

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

        .news-cat {
            display: inline-block;
            background: rgba(0, 217, 255, 0.1);
            border: 1px solid rgba(0, 217, 255, 0.2);
            color: var(--accent);
            font-size: 12px;
            padding: 2px 12px;
            border-radius: var(--radius-pill);
            margin-bottom: 8px;
            font-weight: 500;
        }

        .news-info h3 {
            font-size: 16px;
            font-weight: 600;
            color: #FFFFFF;
            margin-bottom: 6px;
            line-height: 1.4;
            transition: color 0.3s;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        .news-card:hover .news-info h3 {
            color: var(--accent);
        }

        .news-info p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 8px;
        }

        .news-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 12px;
            color: var(--text-muted);
        }

        .news-arrow {
            color: var(--accent);
            font-size: 14px;
            transition: transform 0.3s;
        }

        .news-card:hover .news-arrow {
            transform: translateX(4px);
        }

        .empty-state {
            text-align: center;
            padding: 60px 20px;
            background: var(--glass-bg);
            border: 1px dashed rgba(255, 255, 255, 0.15);
            border-radius: var(--radius-card);
            backdrop-filter: blur(16px);
        }

        .empty-icon {
            font-size: 48px;
            margin-bottom: 16px;
            color: var(--text-muted);
        }

        .empty-state p {
            font-size: 16px;
            color: var(--text-secondary);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 56px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.4fr;
            gap: 40px;
            padding-bottom: 40px;
        }

        .footer-brand .brand-logo {
            margin-bottom: 16px;
        }

        .footer-brand .brand-text {
            font-size: 18px;
        }

        .footer-brand-desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 16px;
            max-width: 260px;
        }

        .footer-icp {
            font-size: 12px;
            color: var(--text-muted);
            margin-top: 8px;
        }

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

        .footer-col ul {
            list-style: none;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-col ul li a {
            font-size: 14px;
            color: var(--text-secondary);
            transition: color 0.3s, padding-left 0.3s;
        }

        .footer-col ul li a:hover {
            color: var(--accent);
            padding-left: 4px;
        }

        .footer-contact-list {
            list-style: none;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-contact-list li {
            font-size: 14px;
            color: var(--text-secondary);
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .footer-contact-list li i {
            color: var(--accent);
            width: 18px;
            text-align: center;
            font-size: 14px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 20px 0;
        }

        .footer-bottom-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 13px;
            color: var(--text-muted);
            flex-wrap: wrap;
            gap: 10px;
        }

        .footer-bottom-inner a {
            color: var(--text-muted);
            margin-left: 20px;
            transition: color 0.3s;
        }

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

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .hero h1 {
                font-size: 44px;
            }

            .countdown-item .num {
                font-size: 24px;
            }

            .countdown-bar {
                flex-wrap: wrap;
                justify-content: center;
                border-radius: 20px;
                padding: 16px 24px;
            }

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

        @media (max-width: 768px) {
            .section {
                padding: var(--space-section-sm) 0;
            }

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

            .header-search {
                display: none;
            }

            .menu-toggle {
                display: flex;
            }

            .header-top .container {
                gap: 12px;
            }

            .brand-text {
                font-size: 17px;
            }

            .hero {
                padding: 60px 0 50px;
            }

            .hero h1 {
                font-size: 32px;
            }

            .hero-subtitle {
                font-size: 16px;
            }

            .features-grid {
                grid-template-columns: 1fr;
                max-width: 480px;
            }

            .feature-card:nth-child(2),
            .feature-card:nth-child(4) {
                transform: none;
            }

            .feature-card:nth-child(2):hover,
            .feature-card:nth-child(4):hover {
                transform: translateY(4px) scale(1.02);
            }

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

            .gallery-main {
                height: 200px;
            }

            .gallery-side {
                grid-template-columns: 1fr 1fr;
                grid-template-rows: none;
                gap: 16px;
            }

            .gallery-side-item {
                height: 100px;
            }

            .cta-banner {
                padding: 40px 24px;
            }

            .cta-banner h2 {
                font-size: 24px;
            }

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

            .cta-form .input-wrap {
                width: 100%;
            }

            .news-card {
                flex-direction: column;
                padding: 14px;
            }

            .news-thumb {
                width: 100%;
                height: 140px;
            }

            .countdown-item {
                min-width: 50px;
                padding: 6px 8px;
            }

            .countdown-item .num {
                font-size: 20px;
            }

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

            .channel-tabs a {
                padding: 10px 14px;
                font-size: 13px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }

            .brand-logo .logo-icon {
                width: 34px;
                height: 34px;
                font-size: 16px;
            }

            .brand-text {
                font-size: 15px;
            }

            .header-actions .btn {
                padding: 8px 14px;
                font-size: 12px;
            }

            .hero h1 {
                font-size: 26px;
            }

            .hero-cta .btn {
                padding: 12px 20px;
                font-size: 13px;
            }

            .countdown-bar {
                flex-direction: column;
                gap: 10px;
                padding: 16px;
                border-radius: 16px;
            }

            .countdown-items {
                gap: 6px;
            }

            .countdown-item {
                min-width: 46px;
            }

            .countdown-item .num {
                font-size: 18px;
            }

            .gallery-side {
                grid-template-columns: 1fr;
            }

            .gallery-side-item {
                height: 120px;
            }

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

/* roulang page: article */
:root {
            --bg-primary: #0A1628;
            --bg-secondary: #0B1526;
            --bg-deep: #060D1A;
            --accent: #00D9FF;
            --accent-secondary: #7B61FF;
            --text-primary: #E8F0FA;
            --text-secondary: #94A3B8;
            --text-muted: #64748B;
            --border-glass: rgba(255, 255, 255, 0.12);
            --bg-glass: rgba(255, 255, 255, 0.06);
            --bg-glass-hover: rgba(255, 255, 255, 0.12);
            --radius-btn: 10px;
            --radius-card: 12px;
            --radius-tag: 999px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.35);
            --shadow-card-hover: 0 12px 40px rgba(0, 217, 255, 0.15);
            --shadow-glow: 0 0 24px rgba(0, 217, 255, 0.35);
            --font-main: "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
            --font-mono: "JetBrains Mono", Consolas, monospace;
            --container: 1200px;
            --gap: 24px;
            --section-space: 96px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-main);
            background: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

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

        a {
            color: var(--accent);
            text-decoration: none;
            transition: color 0.3s ease;
        }

        a:hover {
            color: #4de8ff;
        }

        button,
        input {
            font-family: inherit;
            border: none;
            outline: none;
        }

        ul,
        ol {
            list-style: none;
        }

        :focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        /* ===== 双层导航 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(10, 22, 40, 0.85);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

        .header-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            height: 72px;
        }

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

        .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--accent), var(--accent-secondary));
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 18px;
            box-shadow: 0 0 18px rgba(0, 217, 255, 0.35);
        }

        .brand-text {
            font-size: 19px;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }

        .header-search {
            flex: 1;
            max-width: 440px;
            margin: 0 24px;
            position: relative;
        }

        .header-search input {
            width: 100%;
            height: 40px;
            padding: 0 44px 0 16px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-btn);
            color: var(--text-primary);
            font-size: 14px;
            transition: all 0.3s ease;
        }

        .header-search input::placeholder {
            color: var(--text-muted);
        }

        .header-search input:focus {
            border-color: var(--accent);
            box-shadow: 0 0 16px rgba(0, 217, 255, 0.15);
        }

        .header-search .search-btn {
            position: absolute;
            right: 4px;
            top: 4px;
            width: 32px;
            height: 32px;
            border-radius: 8px;
            background: transparent;
            color: var(--text-secondary);
            cursor: pointer;
            font-size: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all 0.3s ease;
        }

        .header-search .search-btn:hover {
            color: var(--accent);
        }

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

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 14px;
            font-weight: 600;
            border-radius: var(--radius-btn);
            cursor: pointer;
            transition: all 0.3s ease;
            white-space: nowrap;
            padding: 0 28px;
            height: 42px;
            line-height: 1;
        }

        .btn-primary {
            background: linear-gradient(135deg, #00D9FF, #3B82F6);
            color: #fff;
            box-shadow: var(--shadow-glow);
            border: none;
        }

        .btn-primary:hover {
            box-shadow: 0 0 36px rgba(0, 217, 255, 0.55);
            transform: translateY(-2px);
            color: #fff;
        }

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

        .btn-secondary {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.2);
            color: var(--text-primary);
        }

        .btn-secondary:hover {
            border-color: var(--accent);
            background: rgba(255, 255, 255, 0.1);
            color: var(--accent);
        }

        .menu-toggle {
            display: none;
            width: 40px;
            height: 40px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid var(--border-glass);
            border-radius: 10px;
            color: var(--text-primary);
            font-size: 16px;
            cursor: pointer;
            align-items: center;
            justify-content: center;
            transition: all 0.3s ease;
        }

        .menu-toggle:hover {
            border-color: var(--accent);
            color: var(--accent);
        }

        .channel-nav {
            background: rgba(10, 22, 40, 0.6);
            border-top: 1px solid rgba(255, 255, 255, 0.04);
        }

        .channel-tabs {
            display: flex;
            align-items: center;
            gap: 2px;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
        }

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

        .channel-tabs li {
            flex-shrink: 0;
        }

        .channel-tabs a {
            display: block;
            padding: 14px 20px 12px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            border-bottom: 2px solid transparent;
            transition: all 0.3s ease;
            white-space: nowrap;
        }

        .channel-tabs a:hover {
            color: var(--text-primary);
        }

        .channel-tabs a.active {
            color: var(--accent);
            border-bottom-color: var(--accent);
        }

        /* ===== 面包屑 ===== */
        .breadcrumb-wrap {
            padding: 28px 0 0;
        }

        .breadcrumb-list {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 13px;
            color: var(--text-muted);
        }

        .breadcrumb-list a {
            color: var(--text-muted);
            transition: color 0.3s ease;
        }

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

        .breadcrumb-list .separator {
            color: var(--text-muted);
            font-size: 12px;
        }

        .breadcrumb-list .current {
            color: var(--text-secondary);
            max-width: 280px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        /* ===== 文章详情区 ===== */
        .article-section {
            padding: 48px 0 96px;
            position: relative;
        }

        .article-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 100%;
            height: 300px;
            background: radial-gradient(circle at 70% 20%, rgba(0, 217, 255, 0.12), transparent 60%);
            pointer-events: none;
            z-index: 0;
        }

        .article-layout {
            position: relative;
            z-index: 1;
        }

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

        .article-header {
            margin-bottom: 40px;
        }

        .article-header .category-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 5px 14px;
            background: rgba(0, 217, 255, 0.1);
            border: 1px solid rgba(0, 217, 255, 0.3);
            border-radius: var(--radius-tag);
            color: var(--accent);
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 16px;
        }

        .article-header h1 {
            font-size: 36px;
            line-height: 1.3;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 20px;
            letter-spacing: 0.5px;
        }

        .article-meta {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
            color: var(--text-muted);
            font-size: 14px;
        }

        .article-meta i {
            margin-right: 6px;
            color: var(--accent);
        }

        .article-body {
            background: var(--bg-glass);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-card);
            padding: 40px 48px;
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            box-shadow: var(--shadow-card);
        }

        .article-body > * {
            max-width: 100%;
        }

        .article-body p {
            margin-bottom: 24px;
            font-size: 16px;
            line-height: 1.9;
            color: var(--text-secondary);
        }

        .article-body h2 {
            font-size: 24px;
            font-weight: 700;
            color: var(--text-primary);
            margin: 40px 0 20px;
            padding-left: 14px;
            border-left: 4px solid var(--accent);
        }

        .article-body h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--text-primary);
            margin: 32px 0 16px;
        }

        .article-body h4 {
            font-size: 17px;
            font-weight: 600;
            color: var(--text-primary);
            margin: 24px 0 12px;
        }

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

        .article-body ul li {
            list-style: disc;
            margin-bottom: 8px;
            color: var(--text-secondary);
            font-size: 15px;
        }

        .article-body ol li {
            list-style: decimal;
            margin-bottom: 8px;
            color: var(--text-secondary);
            font-size: 15px;
        }

        .article-body blockquote {
            border-left: 3px solid var(--accent);
            background: rgba(0, 217, 255, 0.05);
            padding: 16px 24px;
            margin: 0 0 24px;
            border-radius: 0 8px 8px 0;
            color: var(--text-secondary);
            font-size: 15px;
        }

        .article-body img {
            border-radius: var(--radius-card);
            margin: 24px 0;
            box-shadow: var(--shadow-card);
        }

        .article-body a {
            color: var(--accent);
            text-decoration: underline;
            text-underline-offset: 4px;
        }

        .article-body a:hover {
            color: #4de8ff;
        }

        .article-body table {
            width: 100%;
            border-collapse: collapse;
            margin: 24px 0;
            font-size: 14px;
            color: var(--text-secondary);
        }

        .article-body table th,
        .article-body table td {
            padding: 12px 16px;
            border: 1px solid rgba(255, 255, 255, 0.08);
            text-align: left;
        }

        .article-body table th {
            background: rgba(255, 255, 255, 0.05);
            color: var(--text-primary);
            font-weight: 600;
        }

        .article-body code {
            font-family: var(--font-mono);
            background: rgba(255, 255, 255, 0.08);
            padding: 2px 8px;
            border-radius: 4px;
            color: var(--accent);
            font-size: 14px;
        }

        /* ===== 内容未找到 ===== */
        .article-not-found {
            background: var(--bg-glass);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-card);
            padding: 72px 40px;
            text-align: center;
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            box-shadow: var(--shadow-card);
        }

        .not-found-icon {
            width: 72px;
            height: 72px;
            border-radius: 50%;
            background: rgba(0, 217, 255, 0.1);
            border: 1px solid rgba(0, 217, 255, 0.2);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 24px;
            font-size: 28px;
            color: var(--accent);
        }

        .article-not-found h2 {
            font-size: 22px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 12px;
        }

        .article-not-found p {
            color: var(--text-secondary);
            font-size: 15px;
            margin-bottom: 24px;
        }

        /* ===== 相关推荐 ===== */
        .related-section {
            max-width: 860px;
            margin: 56px auto 0;
        }

        .related-section h2 {
            font-size: 22px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 24px;
            padding-left: 14px;
            border-left: 4px solid var(--accent);
        }

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

        .related-card {
            background: var(--bg-glass);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-card);
            overflow: hidden;
            transition: all 0.4s ease;
            box-shadow: var(--shadow-card);
        }

        .related-card:hover {
            transform: translateY(-4px);
            border-color: rgba(0, 217, 255, 0.4);
            box-shadow: var(--shadow-card-hover);
        }

        .related-card .thumb {
            height: 120px;
            overflow: hidden;
            position: relative;
        }

        .related-card .thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

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

        .related-card .related-body {
            padding: 16px 18px;
        }

        .related-card .related-cat {
            display: inline-block;
            padding: 3px 10px;
            background: rgba(0, 217, 255, 0.1);
            border: 1px solid rgba(0, 217, 255, 0.2);
            border-radius: var(--radius-tag);
            color: var(--accent);
            font-size: 12px;
            font-weight: 500;
            margin-bottom: 8px;
        }

        .related-card h3 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            line-height: 1.4;
            margin-bottom: 8px;
            transition: color 0.3s ease;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .related-card a:hover h3 {
            color: var(--accent);
        }

        .related-card .related-desc {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        /* ===== 返回入口 ===== */
        .article-back {
            max-width: 860px;
            margin: 48px auto 0;
            text-align: center;
        }

        .back-buttons {
            display: flex;
            justify-content: center;
            gap: 16px;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-deep);
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 64px 0 0;
        }

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

        .footer-brand .brand-logo {
            margin-bottom: 16px;
        }

        .footer-brand .brand-text {
            color: var(--text-primary);
        }

        .footer-brand-desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 12px;
            max-width: 280px;
        }

        .footer-icp {
            font-size: 12px;
            color: var(--text-muted);
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 16px;
        }

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

        .footer-col a {
            font-size: 14px;
            color: var(--text-secondary);
            transition: color 0.3s ease;
        }

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

        .footer-contact-list li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: var(--text-secondary);
        }

        .footer-contact-list i {
            color: var(--accent);
            width: 16px;
            font-size: 14px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 24px 0;
        }

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

        .footer-bottom-inner a {
            color: var(--text-muted);
            margin: 0 8px;
            font-size: 13px;
        }

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

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            :root {
                --section-space: 72px;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 36px;
            }

            .header-search {
                max-width: 320px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-space: 56px;
            }

            .site-header .container {
                padding-left: 16px;
                padding-right: 16px;
            }

            .header-top {
                height: 62px;
            }

            .brand-text {
                font-size: 17px;
            }

            .header-search {
                display: none;
            }

            .header-actions .btn-primary {
                padding: 0 18px;
                height: 38px;
                font-size: 13px;
            }

            .menu-toggle {
                display: flex;
            }

            .channel-tabs a {
                padding: 12px 16px 10px;
                font-size: 14px;
            }

            .article-section {
                padding: 32px 0 72px;
            }

            .article-header h1 {
                font-size: 26px;
            }

            .article-meta {
                gap: 12px;
                font-size: 13px;
            }

            .article-body {
                padding: 28px 20px;
            }

            .article-body p {
                font-size: 15px;
                line-height: 1.85;
            }

            .related-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .related-card .thumb {
                height: 160px;
            }

            .breadcrumb-list .current {
                max-width: 180px;
            }

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

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

        @media (max-width: 520px) {
            .header-actions .btn-primary span {
                display: none;
            }

            .header-actions .btn-primary {
                padding: 0 14px;
                width: 40px;
            }

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

            .back-buttons {
                flex-direction: column;
                align-items: center;
            }

            .back-buttons .btn {
                width: 100%;
                max-width: 260px;
            }
        }

/* roulang page: category1 */
:root {
            --primary-bg: #0A1628;
            --secondary-bg: #0B1526;
            --accent-cyan: #00D9FF;
            --accent-blue: #3B82F6;
            --accent-purple: #7B61FF;
            --text-primary: #E8F0FA;
            --text-secondary: #94A3B8;
            --text-muted: #64748B;
            --glass-bg: rgba(255, 255, 255, 0.06);
            --glass-border: rgba(255, 255, 255, 0.12);
            --glass-bg-light: rgba(255, 255, 255, 0.03);
            --radius-btn: 10px;
            --radius-card: 12px;
            --radius-img: 16px;
            --radius-tag: 999px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.35);
            --shadow-card-hover: 0 12px 40px rgba(0, 217, 255, 0.15);
            --shadow-btn: 0 0 24px rgba(0, 217, 255, 0.35);
            --font-sans: "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
            --font-mono: "JetBrains Mono", Consolas, monospace;
            --section-gap: 96px;
            --container-max: 1200px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            background: var(--primary-bg);
            color: var(--text-primary);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

        body.no-scroll {
            overflow: hidden;
        }

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

        a {
            color: var(--accent-cyan);
            text-decoration: none;
            transition: color .25s;
        }

        a:hover {
            color: #66e9ff;
        }

        ul,
        ol {
            list-style: none;
        }

        button,
        input {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
        }

        button {
            cursor: pointer;
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 2px;
            border-radius: 4px;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 20px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 14px;
            font-weight: 600;
            border-radius: var(--radius-btn);
            padding: 14px 28px;
            transition: all .3s ease;
            cursor: pointer;
            border: none;
            line-height: 1.4;
            white-space: nowrap;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            color: #06121f;
            box-shadow: var(--shadow-btn);
        }

        .btn-primary:hover {
            box-shadow: 0 0 36px rgba(0, 217, 255, 0.55);
            transform: translateY(-2px);
            color: #06121f;
        }

        .btn-primary:active {
            transform: translateY(1px);
            box-shadow: 0 0 18px rgba(0, 217, 255, 0.3);
        }

        .btn-secondary {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.2);
            color: var(--text-primary);
        }

        .btn-secondary:hover {
            border-color: var(--accent-cyan);
            background: rgba(255, 255, 255, 0.1);
            color: var(--accent-cyan);
            transform: translateY(-2px);
        }

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

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

        .tag-badge {
            display: inline-flex;
            align-items: center;
            padding: 4px 12px;
            border-radius: var(--radius-tag);
            font-size: 12px;
            font-weight: 500;
            background: rgba(0, 217, 255, 0.12);
            color: var(--accent-cyan);
            border: 1px solid rgba(0, 217, 255, 0.25);
            line-height: 1.4;
        }

        .tag-badge-purple {
            background: rgba(123, 97, 255, 0.15);
            color: #b8a6ff;
            border-color: rgba(123, 97, 255, 0.3);
        }

        /* ===== Header / 双层导航 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(10, 22, 40, 0.85);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

        .top-nav {
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }

        .top-nav .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 24px;
        }

        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: 0.5px;
            text-decoration: none;
            transition: opacity .25s;
            flex-shrink: 0;
        }

        .brand-logo:hover {
            color: var(--text-primary);
            opacity: 0.85;
        }

        .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
            border-radius: 10px;
            color: #06121f;
            font-size: 16px;
            box-shadow: 0 0 18px rgba(0, 217, 255, 0.25);
        }

        .brand-text {
            font-size: 18px;
            font-weight: 800;
            background: linear-gradient(90deg, #ffffff, var(--accent-cyan));
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .top-nav-search {
            flex: 0 1 420px;
            display: flex;
            align-items: center;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-tag);
            padding: 0 16px;
            height: 40px;
            transition: border-color .3s, box-shadow .3s;
        }

        .top-nav-search:focus-within {
            border-color: var(--accent-cyan);
            box-shadow: 0 0 16px rgba(0, 217, 255, 0.15);
        }

        .top-nav-search i {
            color: var(--text-secondary);
            font-size: 14px;
            margin-right: 8px;
        }

        .top-nav-search input {
            flex: 1;
            background: transparent;
            border: none;
            color: var(--text-primary);
            font-size: 14px;
            height: 100%;
        }

        .top-nav-search input::placeholder {
            color: var(--text-muted);
        }

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

        .nav-search-toggle {
            display: none;
            width: 38px;
            height: 38px;
            align-items: center;
            justify-content: center;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 10px;
            color: var(--text-secondary);
            font-size: 15px;
            transition: all .3s;
        }

        .nav-search-toggle:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
        }

        .top-nav .btn {
            padding: 9px 20px;
            font-size: 13px;
        }

        .channel-nav {
            position: relative;
        }

        .channel-nav .container {
            padding-top: 0;
            padding-bottom: 0;
        }

        .channel-tabs {
            display: flex;
            gap: 4px;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
            padding: 8px 0;
            white-space: nowrap;
        }

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

        .channel-tabs li {
            flex-shrink: 0;
        }

        .channel-tabs a {
            display: block;
            padding: 8px 18px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-tag);
            transition: all .3s;
            position: relative;
        }

        .channel-tabs a:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.08);
        }

        .channel-tabs a.active {
            color: var(--accent-cyan);
            background: rgba(0, 217, 255, 0.08);
        }

        .channel-tabs a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 28px;
            height: 2px;
            background: var(--accent-cyan);
            border-radius: 2px;
            box-shadow: 0 0 8px rgba(0, 217, 255, 0.5);
        }

        .mobile-search-panel {
            display: none;
            padding: 12px 20px;
            background: rgba(10, 22, 40, 0.95);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

        .mobile-search-panel.open {
            display: block;
        }

        .mobile-search-panel .top-nav-search {
            width: 100%;
        }

        /* ===== Hero ===== */
        .page-hero {
            position: relative;
            padding: 88px 0 72px;
            background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            overflow: hidden;
        }

        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(circle at 70% 20%, rgba(0, 217, 255, 0.15), transparent 60%);
            z-index: 1;
        }

        .page-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(10, 22, 40, 0.75) 0%, rgba(10, 22, 40, 0.88) 100%);
            z-index: 1;
        }

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

        .hero-breadcrumb {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 13px;
            color: var(--text-secondary);
            margin-bottom: 28px;
        }

        .hero-breadcrumb a {
            color: var(--text-secondary);
            transition: color .25s;
        }

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

        .hero-breadcrumb .sep {
            color: var(--text-muted);
            font-size: 12px;
        }

        .hero-breadcrumb .current {
            color: var(--accent-cyan);
        }

        .page-hero h1 {
            font-size: 56px;
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: 1px;
            color: #ffffff;
            margin-bottom: 18px;
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 14px;
        }

        .page-hero h1 .hero-accent {
            font-size: 34px;
            font-weight: 600;
            color: var(--accent-cyan);
            background: rgba(0, 217, 255, 0.1);
            border: 1px solid rgba(0, 217, 255, 0.25);
            padding: 4px 16px;
            border-radius: var(--radius-tag);
        }

        .page-hero .hero-subtitle {
            font-size: 18px;
            color: var(--text-secondary);
            max-width: 720px;
            line-height: 1.8;
            margin-bottom: 40px;
        }

        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 44px;
        }

        .hero-stats {
            display: flex;
            gap: 24px;
            flex-wrap: wrap;
            margin-top: 8px;
        }

        .hero-stat-item {
            display: flex;
            align-items: center;
            gap: 12px;
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-card);
            backdrop-filter: blur(12px);
            padding: 16px 24px;
            transition: border-color .3s;
        }

        .hero-stat-item:hover {
            border-color: rgba(0, 217, 255, 0.3);
        }

        .hero-stat-num {
            font-family: var(--font-mono);
            font-size: 28px;
            font-weight: 700;
            color: var(--accent-cyan);
            text-shadow: 0 0 16px rgba(0, 217, 255, 0.3);
        }

        .hero-stat-label {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.4;
        }

        /* ===== Section 通用 ===== */
        .section {
            padding: var(--section-gap) 0;
        }

        .section:nth-child(even) {
            background: rgba(255, 255, 255, 0.02);
        }

        .section-header {
            text-align: center;
            max-width: 680px;
            margin: 0 auto 48px;
        }

        .section-header h2 {
            font-size: 34px;
            font-weight: 700;
            color: #ffffff;
            letter-spacing: 0.5px;
            margin-bottom: 14px;
            line-height: 1.3;
        }

        .section-header h2 .gradient-text {
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .section-header p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
        }

        /* ===== 活动亮点 ===== */
        .highlights-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }

        .highlight-card {
            position: relative;
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-card);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            padding: 36px 32px;
            transition: transform .35s, border-color .35s, box-shadow .35s;
            overflow: hidden;
        }

        .highlight-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 4px;
            height: 40px;
            background: linear-gradient(180deg, var(--accent-purple), transparent);
            border-radius: 0 4px 4px 0;
        }

        .highlight-card:nth-child(2),
        .highlight-card:nth-child(4) {
            transform: translateY(24px);
        }

        .highlight-card:nth-child(2):hover,
        .highlight-card:nth-child(4):hover {
            transform: translateY(20px);
        }

        .highlight-card:nth-child(2)::before {
            background: linear-gradient(180deg, var(--accent-cyan), transparent);
        }

        .highlight-card:hover {
            border-color: rgba(0, 217, 255, 0.35);
            box-shadow: var(--shadow-card-hover);
        }

        .highlight-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: rgba(0, 217, 255, 0.1);
            border: 1px solid rgba(0, 217, 255, 0.2);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--accent-cyan);
            margin-bottom: 20px;
            box-shadow: 0 0 20px rgba(0, 217, 255, 0.08);
        }

        .highlight-card:nth-child(2n) .highlight-icon {
            background: rgba(123, 97, 255, 0.1);
            border-color: rgba(123, 97, 255, 0.2);
            color: #b8a6ff;
            box-shadow: 0 0 20px rgba(123, 97, 255, 0.08);
        }

        .highlight-card h3 {
            font-size: 18px;
            font-weight: 600;
            color: #ffffff;
            margin-bottom: 10px;
        }

        .highlight-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ===== 活动类型卡片 ===== */
        .activities-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .activity-card {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-card);
            backdrop-filter: blur(16px);
            overflow: hidden;
            transition: transform .35s, border-color .35s, box-shadow .35s;
            display: flex;
            flex-direction: column;
        }

        .activity-card:hover {
            transform: translateY(-6px);
            border-color: rgba(0, 217, 255, 0.35);
            box-shadow: var(--shadow-card-hover);
        }

        .activity-card-media {
            position: relative;
            height: 160px;
            overflow: hidden;
        }

        .activity-card-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .5s ease;
        }

        .activity-card:hover .activity-card-media img {
            transform: scale(1.05);
        }

        .activity-card-media::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 40%, rgba(0, 0, 0, 0.4));
        }

        .activity-card-body {
            padding: 24px 24px 28px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .activity-card-body .tag-badge {
            align-self: flex-start;
            margin-bottom: 14px;
        }

        .activity-card-body h3 {
            font-size: 18px;
            font-weight: 600;
            color: #ffffff;
            margin-bottom: 10px;
        }

        .activity-card-body p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
            flex: 1;
        }

        .activity-card-footer {
            margin-top: 16px;
            padding-top: 14px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 13px;
        }

        .activity-card-footer .activity-date {
            color: var(--text-muted);
            font-family: var(--font-mono);
            font-size: 12px;
        }

        .activity-card-footer a {
            font-size: 13px;
            font-weight: 500;
            color: var(--accent-cyan);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: gap .25s;
        }

        .activity-card-footer a:hover {
            gap: 8px;
        }

        /* ===== 参与流程 ===== */
        .process-section {
            background: rgba(255, 255, 255, 0.02);
            position: relative;
        }

        .process-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: radial-gradient(circle at 15% 60%, rgba(123, 97, 255, 0.08), transparent 45%);
            pointer-events: none;
        }

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

        .process-step {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-card);
            backdrop-filter: blur(16px);
            padding: 36px 28px;
            position: relative;
            text-align: center;
            transition: transform .3s, border-color .3s;
        }

        .process-step:hover {
            transform: translateY(-4px);
            border-color: rgba(0, 217, 255, 0.3);
        }

        .process-step-num {
            font-family: var(--font-mono);
            font-size: 42px;
            font-weight: 700;
            color: transparent;
            -webkit-text-stroke: 1px rgba(0, 217, 255, 0.4);
            line-height: 1;
            margin-bottom: 16px;
        }

        .process-step-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: rgba(0, 217, 255, 0.08);
            border: 1px solid rgba(0, 217, 255, 0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-cyan);
            font-size: 18px;
            margin: 0 auto 18px;
        }

        .process-step h3 {
            font-size: 16px;
            font-weight: 600;
            color: #ffffff;
            margin-bottom: 10px;
        }

        .process-step p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 840px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-card);
            margin-bottom: 14px;
            overflow: hidden;
            transition: border-color .3s, box-shadow .3s;
        }

        .faq-item:hover {
            border-color: rgba(0, 217, 255, 0.2);
        }

        .faq-item.active {
            border-color: rgba(0, 217, 255, 0.3);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 22px 28px;
            font-size: 16px;
            font-weight: 500;
            color: #ffffff;
            text-align: left;
            transition: background .3s;
            border-radius: var(--radius-card);
        }

        .faq-question:hover {
            background: rgba(255, 255, 255, 0.04);
        }

        .faq-question .faq-arrow {
            font-size: 14px;
            color: var(--text-muted);
            transition: transform .35s;
            flex-shrink: 0;
        }

        .faq-item.active .faq-arrow {
            transform: rotate(180deg);
            color: var(--accent-cyan);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .4s ease;
        }

        .faq-answer-inner {
            padding: 0 28px 22px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
            background: var(--glass-bg-light);
            border-top: 1px solid rgba(255, 255, 255, 0.03);
            padding-top: 16px;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 64px 0;
        }

        .cta-banner {
            position: relative;
            background: linear-gradient(135deg, rgba(0, 217, 255, 0.08), rgba(123, 97, 255, 0.06));
            border: 1px solid rgba(0, 217, 255, 0.2);
            border-radius: 20px;
            padding: 64px 48px;
            text-align: center;
            overflow: hidden;
        }

        .cta-banner::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 180px;
            height: 180px;
            background: radial-gradient(circle, rgba(0, 217, 255, 0.2), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-banner::after {
            content: '';
            position: absolute;
            bottom: -40px;
            left: -40px;
            width: 120px;
            height: 120px;
            background: radial-gradient(circle, rgba(123, 97, 255, 0.15), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-banner h2 {
            font-size: 30px;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 14px;
            position: relative;
            z-index: 1;
        }

        .cta-banner p {
            font-size: 15px;
            color: var(--text-secondary);
            margin-bottom: 28px;
            position: relative;
            z-index: 1;
        }

        .cta-banner .btn {
            position: relative;
            z-index: 1;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #060D1A;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 64px 0 0;
            margin-top: 40px;
        }

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

        .footer-brand .brand-logo {
            margin-bottom: 16px;
        }

        .footer-brand-desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 16px;
            max-width: 320px;
        }

        .footer-icp {
            font-size: 12px;
            color: var(--text-muted);
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: #ffffff;
            margin-bottom: 18px;
        }

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

        .footer-col ul a {
            font-size: 13px;
            color: var(--text-secondary);
            transition: color .25s, transform .25s;
            display: inline-block;
            transform: translateX(0);
        }

        .footer-col ul a:hover {
            color: var(--accent-cyan);
            transform: translateX(3px);
        }

        .footer-contact-list li {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-secondary);
            margin-bottom: 12px;
        }

        .footer-contact-list i {
            color: var(--accent-cyan);
            font-size: 13px;
            width: 16px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            padding: 20px 0;
        }

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

        .footer-bottom-inner a {
            color: var(--text-muted);
            margin-left: 16px;
            transition: color .25s;
            font-size: 13px;
        }

        .footer-bottom-inner a:hover {
            color: var(--accent-cyan);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            :root {
                --section-gap: 72px;
            }

            .top-nav-search {
                flex-basis: 280px;
            }

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

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

            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 40px;
            }

            .page-hero h1 {
                font-size: 40px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-gap: 56px;
            }

            .container {
                padding: 0 16px;
            }

            .top-nav .container {
                height: 60px;
                gap: 12px;
            }

            .top-nav-search {
                display: none;
            }

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

            .top-nav .btn {
                padding: 7px 14px;
                font-size: 12px;
            }

            .brand-text {
                font-size: 16px;
            }

            .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 14px;
            }

            .channel-tabs a {
                padding: 7px 14px;
                font-size: 13px;
            }

            .page-hero {
                padding: 64px 0 48px;
            }

            .page-hero h1 {
                font-size: 32px;
            }

            .page-hero h1 .hero-accent {
                font-size: 22px;
                padding: 2px 12px;
            }

            .page-hero .hero-subtitle {
                font-size: 15px;
            }

            .hero-actions {
                flex-direction: column;
                align-items: stretch;
                gap: 12px;
            }

            .hero-stats {
                flex-direction: column;
                gap: 12px;
            }

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

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

            .highlight-card:nth-child(2),
            .highlight-card:nth-child(4) {
                transform: translateY(0);
            }

            .highlight-card:nth-child(2):hover,
            .highlight-card:nth-child(4):hover {
                transform: translateY(-2px);
            }

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

            .process-steps {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .section-header h2 {
                font-size: 26px;
            }

            .faq-question {
                padding: 18px 20px;
                font-size: 15px;
            }

            .faq-answer-inner {
                padding: 0 20px 18px;
            }

            .cta-banner {
                padding: 40px 24px;
            }

            .cta-banner h2 {
                font-size: 24px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 36px;
            }

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

            .footer-bottom-inner a {
                margin: 0 8px;
            }
        }

        @media (max-width: 520px) {
            .channel-tabs a {
                padding: 6px 12px;
                font-size: 12px;
            }

            .top-nav-actions .btn {
                display: none;
            }

            .page-hero h1 {
                font-size: 28px;
            }

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

            .highlight-card {
                padding: 28px 20px;
            }

            .process-step {
                padding: 28px 20px;
            }
        }

/* roulang page: category2 */
:root {
            --bg-primary: #0A1628;
            --bg-secondary: #0B1526;
            --bg-dark: #060D1A;
            --glass-bg: rgba(255, 255, 255, 0.06);
            --glass-bg-hover: rgba(255, 255, 255, 0.1);
            --glass-border: rgba(255, 255, 255, 0.12);
            --accent: #00D9FF;
            --accent-secondary: #7B61FF;
            --accent-gradient: linear-gradient(135deg, #00D9FF, #3B82F6);
            --text-primary: #E8F0FA;
            --text-secondary: #94A3B8;
            --text-muted: #64748B;
            --radius-sm: 10px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.35);
            --shadow-hover: 0 12px 40px rgba(0, 217, 255, 0.15);
            --glow-primary: 0 0 24px rgba(0, 217, 255, 0.35);
            --font-main: "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
            --font-mono: "JetBrains Mono", Consolas, monospace;
            --section-space: 96px;
            --card-gap: 24px;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-main);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background-color: var(--bg-primary);
            background-image: radial-gradient(circle at 70% 20%, rgba(0, 217, 255, 0.08), transparent 60%), radial-gradient(circle at 10% 80%, rgba(123, 97, 255, 0.05), transparent 50%);
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            color: var(--accent);
            text-decoration: none;
            transition: color 0.25s ease;
        }
        a:hover {
            color: #5ee7ff;
        }
        button {
            font-family: inherit;
            border: none;
            cursor: pointer;
            background: none;
            color: inherit;
        }
        input {
            font-family: inherit;
            border: none;
            outline: none;
            background: none;
            color: var(--text-primary);
        }
        ul {
            list-style: none;
        }
        :focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(10, 22, 40, 0.88);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .header-main {
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .header-main-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 14px;
            padding-bottom: 14px;
            gap: 16px;
        }
        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            background: var(--accent-gradient);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 18px;
            box-shadow: var(--glow-primary);
        }
        .brand-text {
            font-size: 20px;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }
        .header-search {
            display: flex;
            align-items: center;
            flex: 1;
            max-width: 460px;
            margin: 0 20px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: 999px;
            padding: 6px 8px 6px 18px;
            transition: border-color 0.3s, box-shadow 0.3s;
        }
        .header-search:focus-within {
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(0, 217, 255, 0.15);
        }
        .header-search input {
            flex: 1;
            font-size: 14px;
            color: var(--text-primary);
            background: transparent;
        }
        .header-search input::placeholder {
            color: var(--text-muted);
        }
        .header-search .search-btn {
            width: 34px;
            height: 34px;
            border-radius: 50%;
            background: var(--accent-gradient);
            color: #fff;
            font-size: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: box-shadow 0.3s, transform 0.2s;
            flex-shrink: 0;
        }
        .header-search .search-btn:hover {
            box-shadow: var(--glow-primary);
            transform: scale(1.05);
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .menu-toggle {
            display: none;
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            border: 1px solid rgba(255, 255, 255, 0.15);
            background: rgba(255, 255, 255, 0.06);
            color: var(--text-primary);
            font-size: 18px;
            align-items: center;
            justify-content: center;
            transition: background 0.3s;
        }
        .menu-toggle:hover {
            background: rgba(255, 255, 255, 0.12);
        }
        .channel-nav {
            background: rgba(10, 22, 40, 0.6);
        }
        .channel-tabs {
            display: flex;
            gap: 4px;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
            padding: 0 0;
        }
        .channel-tabs::-webkit-scrollbar {
            display: none;
        }
        .channel-tabs a {
            display: inline-block;
            padding: 12px 20px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            border-bottom: 2px solid transparent;
            white-space: nowrap;
            transition: color 0.25s, border-color 0.25s;
            border-radius: 0;
        }
        .channel-tabs a:hover {
            color: var(--text-primary);
        }
        .channel-tabs a.active {
            color: var(--accent);
            border-bottom-color: var(--accent);
            font-weight: 600;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            font-weight: 600;
            line-height: 1.2;
            padding: 14px 28px;
            border-radius: var(--radius-sm);
            transition: all 0.3s ease;
            text-align: center;
        }
        .btn-primary {
            background: var(--accent-gradient);
            color: #fff;
            box-shadow: var(--glow-primary);
        }
        .btn-primary:hover {
            box-shadow: 0 0 36px rgba(0, 217, 255, 0.55);
            transform: translateY(-2px);
            color: #fff;
        }
        .btn-primary:active {
            transform: translateY(0);
        }
        .btn-secondary {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.2);
            color: var(--text-primary);
        }
        .btn-secondary:hover {
            border-color: var(--accent);
            background: rgba(255, 255, 255, 0.12);
            color: var(--accent);
            transform: translateY(-2px);
        }
        .btn-secondary:active {
            transform: translateY(0);
        }
        .btn-lg {
            padding: 16px 36px;
            font-size: 16px;
        }
        .btn-sm {
            padding: 10px 20px;
            font-size: 13px;
        }
        .btn-block {
            width: 100%;
        }
        .page-hero {
            position: relative;
            padding: 72px 0 76px;
            background-image: linear-gradient(135deg, rgba(10, 22, 40, 0.92), rgba(10, 22, 40, 0.78)), url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            overflow: hidden;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            top: -40%;
            right: -10%;
            width: 480px;
            height: 480px;
            background: radial-gradient(circle, rgba(0, 217, 255, 0.18), transparent 65%);
            pointer-events: none;
        }
        .page-hero .container {
            position: relative;
            z-index: 2;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 24px;
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--text-muted);
            transition: color 0.25s;
        }
        .breadcrumb a:hover {
            color: var(--accent);
        }
        .breadcrumb-sep {
            color: var(--text-muted);
            font-size: 12px;
        }
        .page-hero h1 {
            font-size: 46px;
            font-weight: 800;
            line-height: 1.3;
            color: #fff;
            max-width: 700px;
            margin-bottom: 20px;
            letter-spacing: 0.5px;
        }
        .page-hero p {
            font-size: 17px;
            line-height: 1.8;
            color: var(--text-secondary);
            max-width: 680px;
            margin-bottom: 32px;
        }
        .page-hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
        }
        .section {
            padding: var(--section-space) 0;
        }
        .section-alt {
            background: var(--bg-secondary);
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }
        .section-head {
            text-align: center;
            margin-bottom: 44px;
        }
        .section-head h2 {
            font-size: 34px;
            font-weight: 800;
            line-height: 1.4;
            color: #fff;
            margin-bottom: 12px;
        }
        .section-head p {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 560px;
            margin: 0 auto;
        }
        .topic-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: var(--card-gap);
        }
        .topic-card {
            position: relative;
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            padding: 36px 32px 32px;
            backdrop-filter: blur(16px);
            box-shadow: var(--shadow-card);
            transition: all 0.35s ease;
            overflow: hidden;
        }
        .topic-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 4px;
            height: 40px;
            border-radius: 0 4px 4px 0;
            background: var(--accent-gradient);
        }
        .topic-card:nth-child(2n) {
            transform: translateY(24px);
        }
        .topic-card:hover {
            box-shadow: var(--shadow-hover);
            border-color: rgba(0, 217, 255, 0.3);
            transform: translateY(4px) !important;
        }
        .topic-card:nth-child(2n):hover {
            transform: translateY(28px) !important;
        }
        .topic-card .icon-wrap {
            width: 52px;
            height: 52px;
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: var(--accent);
            background: rgba(0, 217, 255, 0.1);
            border: 1px solid rgba(0, 217, 255, 0.2);
            margin-bottom: 20px;
        }
        .topic-card h3 {
            font-size: 19px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
        }
        .topic-card p {
            font-size: 14px;
            line-height: 1.7;
            color: var(--text-secondary);
            margin-bottom: 16px;
        }
        .topic-card .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 500;
            color: var(--accent);
            transition: gap 0.25s;
        }
        .topic-card .card-link:hover {
            gap: 10px;
            color: #5ee7ff;
        }
        .scene-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--card-gap);
        }
        .scene-card {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-md);
            padding: 30px 24px;
            text-align: center;
            transition: all 0.3s;
        }
        .scene-card:hover {
            border-color: rgba(123, 97, 255, 0.35);
            background: rgba(255, 255, 255, 0.07);
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .scene-card .scene-icon {
            width: 48px;
            height: 48px;
            border-radius: 14px;
            margin: 0 auto 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            background: rgba(123, 97, 255, 0.12);
            color: var(--accent-secondary);
            border: 1px solid rgba(123, 97, 255, 0.25);
        }
        .scene-card h3 {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
        }
        .scene-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.65;
        }
        .steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--card-gap);
        }
        .step-item {
            position: relative;
            text-align: center;
            padding: 20px 16px;
        }
        .step-num {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            margin: 0 auto 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            font-weight: 700;
            font-family: var(--font-mono);
            color: #fff;
            background: var(--accent-gradient);
            box-shadow: var(--glow-primary);
        }
        .step-item h3 {
            font-size: 17px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
        }
        .step-item p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.65;
        }
        .step-item::after {
            content: '';
            position: absolute;
            top: 42px;
            right: -12%;
            width: 24%;
            height: 1px;
            background: linear-gradient(90deg, rgba(0, 217, 255, 0.4), transparent);
        }
        .step-item:last-child::after {
            display: none;
        }
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--card-gap);
        }
        .feature-card {
            border-radius: var(--radius-md);
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: all 0.35s ease;
            display: flex;
            flex-direction: column;
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(0, 217, 255, 0.25);
        }
        .feature-thumb {
            position: relative;
            height: 140px;
            overflow: hidden;
        }
        .feature-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s;
        }
        .feature-card:hover .feature-thumb img {
            transform: scale(1.05);
        }
        .feature-thumb::after {
            content: '';
            position: absolute;
            left: 0;
            right: 0;
            bottom: 0;
            height: 60%;
            background: linear-gradient(transparent, rgba(0, 0, 0, 0.55));
        }
        .feature-thumb .thumb-badge {
            position: absolute;
            right: 12px;
            bottom: 12px;
            z-index: 2;
            background: rgba(255, 255, 255, 0.14);
            backdrop-filter: blur(10px);
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: 999px;
            padding: 4px 14px;
            font-size: 12px;
            color: #fff;
        }
        .feature-body {
            padding: 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .feature-body .feature-cat {
            font-size: 12px;
            font-weight: 600;
            color: var(--accent);
            margin-bottom: 10px;
            display: inline-block;
            align-self: flex-start;
            background: rgba(0, 217, 255, 0.1);
            border-radius: 999px;
            padding: 4px 12px;
        }
        .feature-body h3 {
            font-size: 17px;
            font-weight: 700;
            color: #fff;
            line-height: 1.5;
            margin-bottom: 10px;
        }
        .feature-body h3 a {
            color: inherit;
        }
        .feature-body h3 a:hover {
            color: var(--accent);
        }
        .feature-body p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            flex: 1;
            margin-bottom: 16px;
        }
        .feature-body .feature-meta {
            font-size: 13px;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .feature-body .feature-meta i {
            font-size: 12px;
        }
        .faq-section {
            background: var(--bg-secondary);
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .faq-item {
            background: var(--glass-bg);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: border-color 0.3s, box-shadow 0.3s;
        }
        .faq-item:hover {
            border-color: rgba(0, 217, 255, 0.2);
        }
        .faq-item.open {
            border-color: rgba(0, 217, 255, 0.35);
            box-shadow: 0 8px 32px rgba(0, 217, 255, 0.08);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 22px 24px;
            font-size: 16px;
            font-weight: 500;
            color: #fff;
            text-align: left;
            background: transparent;
            cursor: pointer;
            transition: background 0.25s;
        }
        .faq-question:hover {
            background: rgba(255, 255, 255, 0.04);
        }
        .faq-question .faq-arrow {
            font-size: 14px;
            color: var(--accent);
            transition: transform 0.3s;
            flex-shrink: 0;
            margin-left: 12px;
        }
        .faq-item.open .faq-arrow {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 24px;
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.75;
            background: rgba(255, 255, 255, 0.02);
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }
        .cta-section {
            position: relative;
            padding: 80px 0;
            overflow: hidden;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -60%;
            left: 20%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(0, 217, 255, 0.15), transparent 60%);
            pointer-events: none;
        }
        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -80%;
            right: 10%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(123, 97, 255, 0.12), transparent 60%);
            pointer-events: none;
        }
        .cta-inner {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 720px;
            margin: 0 auto;
            background: var(--glass-bg);
            border: 1px solid rgba(0, 217, 255, 0.2);
            border-radius: var(--radius-lg);
            padding: 60px 48px;
            backdrop-filter: blur(20px);
            box-shadow: 0 8px 48px rgba(0, 0, 0, 0.4), 0 0 0 1px rgba(0, 217, 255, 0.08);
        }
        .cta-inner h2 {
            font-size: 30px;
            font-weight: 800;
            color: #fff;
            line-height: 1.4;
            margin-bottom: 14px;
        }
        .cta-inner p {
            font-size: 16px;
            color: var(--text-secondary);
            margin-bottom: 32px;
            line-height: 1.7;
        }
        .cta-inner .btn {
            min-width: 180px;
        }
        .site-footer {
            background: var(--bg-dark);
            padding: 60px 0 0;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.4fr;
            gap: 40px;
            margin-bottom: 44px;
        }
        .footer-brand .brand-logo {
            margin-bottom: 16px;
        }
        .footer-brand-desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 14px;
            max-width: 360px;
        }
        .footer-icp {
            font-size: 12px;
            color: var(--text-muted);
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 18px;
        }
        .footer-col li {
            margin-bottom: 10px;
        }
        .footer-col a {
            font-size: 14px;
            color: var(--text-secondary);
            transition: color 0.25s;
        }
        .footer-col a:hover {
            color: var(--accent);
        }
        .footer-contact-list li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: var(--text-secondary);
        }
        .footer-contact-list i {
            color: var(--accent);
            width: 18px;
            text-align: center;
            font-size: 13px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 20px 0;
        }
        .footer-bottom-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: var(--text-muted);
        }
        .footer-bottom-inner span {
            display: flex;
            align-items: center;
            gap: 16px;
        }
        .footer-bottom-inner a {
            font-size: 13px;
            color: var(--text-muted);
            transition: color 0.25s;
        }
        .footer-bottom-inner a:hover {
            color: var(--accent);
        }
        .mobile-search-expand {
            display: none;
        }

        @media (max-width: 1023px) {
            :root {
                --section-space: 72px;
            }
            .header-search {
                display: none;
            }
            .menu-toggle {
                display: inline-flex;
            }
            .scene-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps {
                grid-template-columns: repeat(2, 1fr);
                gap: 32px;
            }
            .step-item::after {
                display: none;
            }
            .feature-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .page-hero h1 {
                font-size: 36px;
            }
            .cta-inner {
                padding: 44px 28px;
            }
            .cta-inner h2 {
                font-size: 26px;
            }
        }
        @media (max-width: 767px) {
            :root {
                --section-space: 56px;
            }
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .header-main-inner {
                flex-wrap: wrap;
            }
            .brand-text {
                font-size: 17px;
            }
            .logo-icon {
                width: 34px;
                height: 34px;
                font-size: 15px;
            }
            .header-actions .btn-sm {
                padding: 8px 16px;
                font-size: 12px;
            }
            .menu-toggle {
                display: inline-flex;
            }
            .channel-tabs a {
                padding: 10px 16px;
                font-size: 14px;
            }
            .page-hero {
                padding: 48px 0 52px;
            }
            .page-hero h1 {
                font-size: 28px;
                line-height: 1.35;
            }
            .page-hero p {
                font-size: 15px;
            }
            .page-hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .page-hero-actions .btn {
                width: 100%;
            }
            .section-head h2 {
                font-size: 26px;
            }
            .section-head p {
                font-size: 15px;
            }
            .topic-grid {
                grid-template-columns: 1fr;
            }
            .topic-card:nth-child(2n) {
                transform: none;
            }
            .topic-card:nth-child(2n):hover {
                transform: translateY(-4px) !important;
            }
            .scene-grid {
                grid-template-columns: 1fr;
            }
            .steps {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .feature-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom-inner {
                flex-direction: column;
                text-align: center;
            }
            .footer-bottom-inner span {
                flex-wrap: wrap;
                justify-content: center;
                gap: 8px 16px;
            }
            .cta-inner {
                padding: 36px 20px;
            }
            .cta-inner h2 {
                font-size: 22px;
            }
            .cta-inner .btn {
                width: 100%;
            }
            .faq-question {
                padding: 18px 18px;
                font-size: 15px;
            }
            .faq-answer {
                padding: 0 18px;
            }
            .faq-item.open .faq-answer {
                padding: 0 18px 16px;
            }
        }
        @media (max-width: 520px) {
            .brand-text {
                letter-spacing: 0;
            }
            .btn-sm {
                padding: 8px 14px;
                font-size: 12px;
            }
            .topic-card {
                padding: 28px 20px;
            }
            .feature-body {
                padding: 18px;
            }
        }

/* roulang page: category3 */
:root {
            --primary: #00D9FF;
            --primary-dark: #3B82F6;
            --accent: #7B61FF;
            --bg-dark: #0A1628;
            --bg-deeper: #060D1A;
            --text-main: #E8F0FA;
            --text-secondary: #94A3B8;
            --text-muted: #64748B;
            --card-bg: rgba(255, 255, 255, 0.06);
            --card-border: rgba(255, 255, 255, 0.12);
            --radius-btn: 10px;
            --radius-card: 12px;
            --radius-img: 16px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.35);
            --shadow-hover: 0 12px 40px rgba(0, 217, 255, 0.15);
            --shadow-btn: 0 0 24px rgba(0, 217, 255, 0.35);
            --font-main: "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
            --font-mono: "JetBrains Mono", Consolas, monospace;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-main);
            background: var(--bg-dark);
            color: var(--text-main);
            line-height: 1.6;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            text-decoration: none;
            color: var(--primary);
            transition: color 0.2s ease;
        }

        a:hover {
            color: #4DE4FF;
        }

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

        input {
            font-family: inherit;
            font-size: inherit;
        }

        ul,
        ol {
            list-style: none;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(10, 22, 40, 0.85);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

        .header-top-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            height: 68px;
        }

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

        .logo-icon {
            width: 38px;
            height: 38px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            border-radius: 10px;
            color: #fff;
            font-size: 17px;
            box-shadow: 0 0 18px rgba(0, 217, 255, 0.3);
        }

        .brand-text {
            font-size: 22px;
            font-weight: 800;
            color: var(--text-main);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }

        .header-search {
            flex: 1;
            max-width: 480px;
            position: relative;
        }

        .header-search input {
            width: 100%;
            height: 40px;
            padding: 0 46px 0 16px;
            border-radius: 999px;
            border: 1px solid rgba(255, 255, 255, 0.14);
            background: rgba(255, 255, 255, 0.06);
            color: var(--text-main);
            outline: none;
            transition: border-color 0.2s, box-shadow 0.2s;
        }

        .header-search input::placeholder {
            color: var(--text-muted);
        }

        .header-search input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(0, 217, 255, 0.15), 0 0 18px rgba(0, 217, 255, 0.1);
        }

        .header-search button {
            position: absolute;
            right: 4px;
            top: 50%;
            transform: translateY(-50%);
            width: 32px;
            height: 32px;
            border-radius: 999px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-secondary);
            transition: color 0.2s, background 0.2s;
        }

        .header-search button:hover {
            color: var(--primary);
            background: rgba(0, 217, 255, 0.1);
        }

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

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 14px;
            padding: 14px 28px;
            transition: all 0.2s ease;
            outline: none;
            line-height: 1.2;
        }

        .btn-primary {
            background: linear-gradient(135deg, #00D9FF, #3B82F6);
            color: #fff;
            border: none;
            box-shadow: 0 0 24px rgba(0, 217, 255, 0.35);
        }

        .btn-primary:hover {
            box-shadow: 0 0 36px rgba(0, 217, 255, 0.55);
            transform: translateY(-2px);
            color: #fff;
        }

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

        .btn-secondary {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.2);
            color: var(--text-main);
        }

        .btn-secondary:hover {
            border-color: var(--primary);
            background: rgba(255, 255, 255, 0.1);
            color: var(--primary);
        }

        .btn-sm {
            padding: 9px 20px;
            font-size: 13px;
            border-radius: 8px;
        }

        .btn:focus-visible,
        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        .mobile-toggle {
            display: none;
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            align-items: center;
            justify-content: center;
            color: var(--text-main);
            font-size: 17px;
            transition: border-color 0.2s, color 0.2s;
        }

        .mobile-toggle:hover {
            border-color: var(--primary);
            color: var(--primary);
        }

        .channel-nav {
            border-top: 1px solid rgba(255, 255, 255, 0.04);
        }

        .channel-tabs {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 10px 0;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
        }

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

        .channel-tabs li {
            flex-shrink: 0;
        }

        .channel-tabs a {
            display: inline-block;
            padding: 8px 20px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 600;
            color: var(--text-secondary);
            transition: all 0.2s ease;
            position: relative;
            white-space: nowrap;
        }

        .channel-tabs a:hover {
            color: var(--primary);
            background: rgba(0, 217, 255, 0.08);
        }

        .channel-tabs a.active {
            color: var(--primary);
            background: rgba(0, 217, 255, 0.1);
            box-shadow: inset 0 -2px 0 var(--primary);
        }

        .mobile-search {
            display: none;
            padding: 12px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.04);
        }

        .mobile-search.open {
            display: flex;
            gap: 8px;
        }

        .mobile-search input {
            flex: 1;
            height: 40px;
            padding: 0 16px;
            border-radius: 999px;
            border: 1px solid rgba(255, 255, 255, 0.14);
            background: rgba(255, 255, 255, 0.06);
            color: var(--text-main);
            outline: none;
        }

        .mobile-search button {
            width: 40px;
            height: 40px;
            border-radius: 999px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        @media (max-width: 768px) {
            .header-search {
                display: none;
            }
            .mobile-toggle {
                display: flex;
            }
            .header-top-inner {
                height: 60px;
            }
            .brand-text {
                font-size: 18px;
            }
            .btn-sm {
                padding: 8px 16px;
                font-size: 12px;
            }
        }

        /* Page Hero */
        .page-hero {
            position: relative;
            padding: 72px 0 56px;
            background-color: var(--bg-deeper);
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            overflow: hidden;
        }

        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to right, rgba(10, 22, 40, 0.94), rgba(10, 22, 40, 0.7));
            z-index: 1;
        }

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

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 24px;
            font-size: 14px;
            color: var(--text-muted);
        }

        .breadcrumb a {
            color: var(--text-secondary);
            transition: color 0.2s;
        }

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

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

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

        .page-hero h1 {
            font-size: 44px;
            font-weight: 800;
            color: var(--text-main);
            line-height: 1.25;
            margin-bottom: 16px;
            letter-spacing: 1px;
        }

        .page-hero .hero-sub {
            font-size: 17px;
            color: var(--text-secondary);
            max-width: 640px;
            line-height: 1.7;
        }

        /* Section */
        .section {
            padding: 96px 0;
        }

        .section:nth-child(even) {
            background: linear-gradient(to bottom, rgba(123, 97, 255, 0.04), rgba(0, 217, 255, 0.02));
        }

        .section-head {
            text-align: center;
            margin-bottom: 48px;
        }

        .section-head h2 {
            font-size: 32px;
            font-weight: 800;
            color: var(--text-main);
            margin-bottom: 12px;
            letter-spacing: 0.5px;
        }

        .section-head p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

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

        .stat-card {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-card);
            padding: 32px 24px;
            text-align: center;
            backdrop-filter: blur(16px);
            transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
            position: relative;
            overflow: hidden;
        }

        .stat-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 24px;
            width: 40px;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            border-radius: 0 0 4px 4px;
        }

        .stat-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(0, 217, 255, 0.3);
        }

        .stat-num {
            font-family: var(--font-mono);
            font-size: 40px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
            margin-bottom: 8px;
            text-shadow: 0 0 20px rgba(0, 217, 255, 0.25);
        }

        .stat-label {
            font-size: 14px;
            color: var(--text-secondary);
        }

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

        .highlight-card {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-card);
            overflow: hidden;
            backdrop-filter: blur(16px);
            transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
        }

        .highlight-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(0, 217, 255, 0.3);
        }

        .highlight-img {
            position: relative;
            height: 200px;
            overflow: hidden;
        }

        .highlight-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

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

        .highlight-img::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(0, 0, 0, 0.55), transparent 70%);
        }

        .img-tag {
            position: absolute;
            right: 12px;
            bottom: 12px;
            z-index: 2;
            padding: 5px 14px;
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(12px);
            border: 1px solid rgba(255, 255, 255, 0.18);
            border-radius: 999px;
            color: var(--text-main);
            font-size: 12px;
            font-weight: 600;
        }

        .highlight-body {
            padding: 24px;
        }

        .highlight-body h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 10px;
        }

        .highlight-body p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.65;
            margin-bottom: 16px;
        }

        .highlight-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 13px;
            color: var(--text-muted);
        }

        .highlight-meta .link-more {
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: gap 0.2s;
        }

        .highlight-meta .link-more:hover {
            gap: 10px;
        }

        /* Timeline */
        .timeline {
            max-width: 760px;
            margin: 0 auto;
            position: relative;
            padding-left: 32px;
        }

        .timeline::before {
            content: '';
            position: absolute;
            left: 11px;
            top: 0;
            bottom: 0;
            width: 2px;
            background: linear-gradient(to bottom, var(--primary), var(--accent), transparent);
            border-radius: 2px;
        }

        .timeline-item {
            position: relative;
            margin-bottom: 40px;
        }

        .timeline-item:last-child {
            margin-bottom: 0;
        }

        .timeline-dot {
            position: absolute;
            left: -29px;
            top: 4px;
            width: 14px;
            height: 14px;
            border-radius: 50%;
            background: var(--primary);
            box-shadow: 0 0 12px rgba(0, 217, 255, 0.5);
            border: 2px solid var(--bg-dark);
        }

        .timeline-card {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-card);
            padding: 24px 28px;
            backdrop-filter: blur(16px);
            transition: border-color 0.2s, box-shadow 0.2s;
        }

        .timeline-card:hover {
            border-color: rgba(0, 217, 255, 0.3);
            box-shadow: var(--shadow-hover);
        }

        .timeline-phase {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 999px;
            background: rgba(0, 217, 255, 0.12);
            color: var(--primary);
            font-size: 12px;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .timeline-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 8px;
        }

        .timeline-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.65;
        }

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

        .plan-card {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-card);
            padding: 32px 28px;
            backdrop-filter: blur(16px);
            transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
            position: relative;
        }

        .plan-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(0, 217, 255, 0.3);
        }

        .plan-badge {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 700;
            background: linear-gradient(135deg, var(--accent), var(--primary-dark));
            color: #fff;
            margin-bottom: 20px;
        }

        .plan-card h3 {
            font-size: 20px;
            font-weight: 800;
            color: var(--text-main);
            margin-bottom: 10px;
        }

        .plan-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.65;
            margin-bottom: 20px;
        }

        .plan-date {
            font-size: 13px;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .plan-date i {
            color: var(--primary);
        }

        /* FAQ */
        .faq-list {
            max-width: 840px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .faq-item {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-card);
            overflow: hidden;
            backdrop-filter: blur(16px);
            transition: border-color 0.2s, box-shadow 0.2s;
        }

        .faq-item:hover {
            border-color: rgba(0, 217, 255, 0.25);
        }

        .faq-item.open {
            border-color: rgba(0, 217, 255, 0.4);
            box-shadow: var(--shadow-hover);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            padding: 20px 24px;
            font-size: 16px;
            font-weight: 500;
            color: var(--text-main);
            text-align: left;
            transition: color 0.2s;
            background: transparent;
        }

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

        .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: rgba(0, 217, 255, 0.1);
            color: var(--primary);
            font-size: 13px;
            transition: transform 0.3s ease;
            margin-left: 16px;
        }

        .faq-item.open .faq-icon {
            transform: rotate(180deg);
        }

        .faq-answer {
            display: none;
            padding: 0 24px 20px;
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.7;
            background: rgba(255, 255, 255, 0.03);
        }

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

        /* CTA */
        .cta-section {
            padding: 96px 0;
            background: var(--bg-deeper);
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 800px;
            height: 400px;
            background: radial-gradient(circle, rgba(0, 217, 255, 0.12), transparent 70%);
            pointer-events: none;
        }

        .cta-inner {
            position: relative;
            z-index: 1;
            max-width: 720px;
            margin: 0 auto;
            text-align: center;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(0, 217, 255, 0.25);
            border-radius: 24px;
            padding: 56px 48px;
            backdrop-filter: blur(20px);
            box-shadow: 0 0 60px rgba(0, 217, 255, 0.1);
        }

        .cta-inner h2 {
            font-size: 30px;
            font-weight: 800;
            color: var(--text-main);
            margin-bottom: 14px;
        }

        .cta-inner p {
            font-size: 15px;
            color: var(--text-secondary);
            margin-bottom: 32px;
            line-height: 1.7;
        }

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

        .cta-form input {
            flex: 1;
            height: 46px;
            padding: 0 18px;
            border-radius: var(--radius-btn);
            border: 1px solid rgba(255, 255, 255, 0.14);
            background: rgba(255, 255, 255, 0.06);
            color: var(--text-main);
            outline: none;
            transition: border-color 0.2s, box-shadow 0.2s;
        }

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

        .cta-form input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(0, 217, 255, 0.15);
        }

        .cta-form .btn {
            height: 46px;
            padding: 0 28px;
        }

        /* Footer */
        .site-footer {
            background: var(--bg-deeper);
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 64px 0 0;
            color: var(--text-secondary);
            font-size: 14px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 48px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }

        .footer-brand .brand-logo {
            margin-bottom: 16px;
        }

        .footer-brand-desc {
            font-size: 14px;
            line-height: 1.7;
            color: var(--text-secondary);
            margin-bottom: 16px;
            max-width: 300px;
        }

        .footer-icp {
            font-size: 12px;
            color: var(--text-muted);
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 18px;
            letter-spacing: 0.5px;
        }

        .footer-col ul li {
            margin-bottom: 12px;
        }

        .footer-col ul a {
            color: var(--text-secondary);
            font-size: 14px;
            transition: color 0.2s;
        }

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

        .footer-contact-list li {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--text-secondary);
            font-size: 14px;
        }

        .footer-contact-list i {
            color: var(--primary);
            width: 16px;
            text-align: center;
        }

        .footer-bottom {
            padding: 24px 0;
        }

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

        .footer-bottom-inner span:last-child a {
            color: var(--text-muted);
            margin-left: 16px;
            transition: color 0.2s;
        }

        .footer-bottom-inner span:last-child a:hover {
            color: var(--primary);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .section {
                padding: 72px 0;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .highlights-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .plan-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .page-hero h1 {
                font-size: 36px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .section {
                padding: 56px 0;
            }
            .page-hero {
                padding: 48px 0 40px;
            }
            .page-hero h1 {
                font-size: 30px;
            }
            .page-hero .hero-sub {
                font-size: 15px;
            }
            .section-head h2 {
                font-size: 26px;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .stat-card {
                padding: 24px 16px;
            }
            .stat-num {
                font-size: 32px;
            }
            .highlights-grid {
                grid-template-columns: 1fr;
            }
            .plan-grid {
                grid-template-columns: 1fr;
            }
            .timeline {
                padding-left: 28px;
            }
            .timeline-dot {
                left: -26px;
            }
            .cta-section {
                padding: 56px 0;
            }
            .cta-inner {
                padding: 40px 24px;
            }
            .cta-form {
                flex-direction: column;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-num {
                font-size: 28px;
            }
            .brand-text {
                font-size: 17px;
            }
            .btn-sm {
                padding: 7px 14px;
                font-size: 12px;
            }
            .faq-question {
                font-size: 15px;
                padding: 18px 18px;
            }
            .cta-inner h2 {
                font-size: 24px;
            }
        }