/* roulang page: index */
:root {
            --bg-base: #070D1A;
            --bg-deep: #040810;
            --surface-glass: rgba(18, 30, 55, 0.66);
            --surface-solid: #0F1B33;
            --stroke-glass: rgba(92, 160, 255, 0.28);
            --primary: #1877FF;
            --primary-strong: #3D9BFF;
            --accent: #FF6B2C;
            --accent-soft: rgba(255, 107, 44, 0.16);
            --info: #00E5CF;
            --text-hi: #F2F7FF;
            --text-mid: #B9C7E2;
            --text-low: #6B7FA3;
            --gradient-hero: radial-gradient(1200px 600px at 75% -10%, rgba(24, 119, 255, 0.28), transparent 60%), linear-gradient(180deg, #0A1324 0%, #070D1A 100%);
            --glow-blue: 0 0 0 1px rgba(61, 155, 255, 0.25), 0 8px 40px rgba(24, 119, 255, 0.22);
            --glow-accent: 0 0 0 1px rgba(255, 107, 44, 0.35), 0 6px 42px rgba(255, 107, 44, 0.3);
            --radius: 16px;
            --space-section: 92px;
            --font-title: 'Rajdhani', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans CJK SC', sans-serif;
            --font-body: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-body);
            font-size: 15px;
            line-height: 1.65;
            color: var(--text-mid);
            background-color: var(--bg-base);
            background-image: radial-gradient(1px 1px at 20% 30%, rgba(255, 255, 255, 0.12), transparent),
                radial-gradient(1px 1px at 70% 60%, rgba(0, 229, 207, 0.08), transparent);
            overflow-x: hidden;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--primary-strong);
            text-decoration: none;
            transition: color 0.2s ease;
        }
        a:hover {
            color: var(--accent);
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
            font-family: inherit;
        }
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: 14px;
            color: var(--text-hi);
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(92, 160, 255, 0.25);
            border-radius: 8px;
            padding: 12px 14px;
            width: 100%;
            transition: border-color 0.2s, box-shadow 0.2s;
        }
        input:focus,
        select:focus,
        textarea:focus {
            outline: none;
            border-color: var(--info);
            box-shadow: 0 0 0 3px rgba(0, 229, 207, 0.15);
        }
        input::placeholder,
        textarea::placeholder {
            color: var(--text-low);
        }
        select {
            appearance: none;
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%236B7FA3' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
            background-repeat: no-repeat;
            background-position: right 14px center;
            padding-right: 36px;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .section {
            padding: var(--space-section) 0;
            position: relative;
        }
        .section-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 40px;
            flex-wrap: wrap;
            gap: 16px;
        }
        .section-header h2 {
            font-size: 30px;
            line-height: 40px;
            font-weight: 700;
            color: var(--text-hi);
            font-family: var(--font-title);
            position: relative;
            padding-left: 18px;
        }
        .section-header h2::before {
            content: '';
            position: absolute;
            left: 0;
            top: 4px;
            bottom: 4px;
            width: 3px;
            border-radius: 3px;
            background: linear-gradient(180deg, var(--accent), var(--primary));
        }
        .section-subtitle {
            font-size: 15px;
            color: var(--text-low);
            margin-top: -8px;
            margin-bottom: 36px;
        }
        .glass-card {
            background: var(--surface-glass);
            border: 1px solid var(--stroke-glass);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-radius: var(--radius);
            box-shadow: 0 16px 48px rgba(2, 8, 20, 0.5);
            transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
        }
        .glass-card:hover {
            transform: translateY(-4px);
            border-color: rgba(92, 160, 255, 0.5);
            box-shadow: var(--glow-blue);
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, #FF4F1C, #FF8E3C);
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            padding: 14px 30px;
            border-radius: 8px;
            box-shadow: 0 4px 28px rgba(255, 107, 44, 0.38);
            transition: all 0.25s ease;
            border: none;
        }
        .btn-primary:hover {
            filter: brightness(1.08);
            transform: translateY(-2px);
            box-shadow: 0 8px 36px rgba(255, 107, 44, 0.5);
            color: #fff;
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 16px rgba(255, 107, 44, 0.3);
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: transparent;
            color: var(--primary-strong);
            font-size: 15px;
            font-weight: 600;
            padding: 14px 30px;
            border-radius: 8px;
            border: 1px solid rgba(61, 155, 255, 0.45);
            transition: all 0.25s ease;
        }
        .btn-secondary:hover {
            background: rgba(24, 119, 255, 0.12);
            color: #fff;
        }
        .btn-sm {
            padding: 10px 22px;
            font-size: 14px;
        }
        .text-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--primary-strong);
            font-weight: 500;
            font-size: 14px;
            transition: gap 0.2s ease;
        }
        .text-link:hover {
            color: var(--accent);
            gap: 10px;
        }
        .badge {
            display: inline-flex;
            align-items: center;
            font-size: 12px;
            color: #9CC9FF;
            background: rgba(24, 119, 255, 0.16);
            border: 1px solid rgba(24, 119, 255, 0.3);
            border-radius: 999px;
            padding: 2px 10px;
            white-space: nowrap;
        }
        .badge::before {
            content: '';
            width: 4px;
            height: 4px;
            border-radius: 50%;
            background: var(--accent);
            margin-right: 6px;
            flex-shrink: 0;
        }
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(7, 13, 26, 0.82);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(92, 160, 255, 0.15);
            height: 66px;
            display: flex;
            align-items: center;
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            gap: 20px;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            font-size: 20px;
            font-weight: 700;
            color: var(--text-hi);
            font-family: var(--font-title);
        }
        .nav-logo:hover {
            color: var(--text-hi);
        }
        .logo-icon {
            width: 32px;
            height: 32px;
            border-radius: 8px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            box-shadow: 0 4px 16px rgba(24, 119, 255, 0.35);
        }
        .main-nav ul {
            list-style: none;
            display: flex;
            align-items: center;
            gap: 28px;
            margin: 0;
        }
        .main-nav a {
            font-size: 14px;
            color: var(--text-mid);
            font-weight: 500;
            padding: 6px 0;
            position: relative;
            transition: color 0.2s;
        }
        .main-nav a:hover {
            color: #fff;
        }
        .main-nav a.active {
            color: #fff;
        }
        .main-nav a.active::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -2px;
            width: 100%;
            height: 2px;
            border-radius: 2px;
            background: var(--accent);
        }
        .nav-right {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-shrink: 0;
        }
        .countdown-badge {
            background: rgba(255, 107, 44, 0.14);
            border: 1px solid rgba(255, 107, 44, 0.32);
            border-radius: 999px;
            padding: 4px 12px;
            font-size: 12px;
            color: #FFB087;
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .countdown-badge .cd-num {
            font-family: var(--font-title);
            font-weight: 600;
            color: #FFB087;
            letter-spacing: 1px;
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 6px;
        }
        .nav-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background: #fff;
            border-radius: 2px;
            transition: all 0.3s ease;
        }
        .hero {
            position: relative;
            padding: 72px 0 96px;
            background: var(--gradient-hero);
            overflow: hidden;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background-size: cover;
            background-position: center;
            opacity: 0.22;
            z-index: 0;
        }
        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 60%;
            height: 100%;
            background:
                linear-gradient(135deg, transparent 0%, transparent 45%, rgba(255, 255, 255, 0.06) 46%, transparent 47%, transparent 52%, rgba(255, 255, 255, 0.04) 53%, transparent 54%);
            opacity: 0.5;
            pointer-events: none;
            z-index: 1;
        }
        .hero .row {
            position: relative;
            z-index: 2;
        }
        .hero-content {
            display: flex;
            align-items: center;
            gap: 40px;
        }
        .hero h1 {
            font-family: var(--font-title);
            font-size: 54px;
            line-height: 1.15;
            font-weight: 700;
            color: var(--text-hi);
            background: linear-gradient(135deg, #fff 30%, #A8C8FF 70%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            letter-spacing: 2px;
            margin-bottom: 18px;
        }
        .hero-subtitle {
            font-size: 17px;
            line-height: 1.7;
            color: var(--text-mid);
            max-width: 560px;
            margin-bottom: 24px;
        }
        .hero-badges {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            margin-bottom: 32px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 12px;
            color: #B9C7E2;
            background: rgba(18, 30, 55, 0.6);
            border: 1px solid rgba(92, 160, 255, 0.25);
            border-radius: 999px;
            padding: 4px 14px;
        }
        .hero-badge i {
            color: var(--info);
        }
        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .dashboard-card {
            position: relative;
            padding: 28px 24px 20px;
            border-top: 2px solid var(--accent);
        }
        .dashboard-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 60px;
            height: 2px;
            background: var(--primary);
            z-index: 1;
        }
        .metric-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 18px;
        }
        .metric-item {
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid rgba(92, 160, 255, 0.12);
            border-radius: 12px;
            padding: 18px 14px;
            text-align: center;
            transition: background 0.2s, border-color 0.2s;
        }
        .metric-item:hover {
            background: rgba(24, 119, 255, 0.08);
            border-color: rgba(92, 160, 255, 0.35);
        }
        .metric-icon {
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: rgba(24, 119, 255, 0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 10px;
            font-size: 16px;
            color: var(--primary-strong);
        }
        .metric-number {
            font-family: var(--font-title);
            font-size: 32px;
            font-weight: 600;
            color: var(--info);
            line-height: 1.2;
        }
        .metric-label {
            font-size: 12px;
            color: var(--text-low);
            margin-top: 6px;
        }
        .live-dot {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            margin-top: 18px;
            font-size: 12px;
            color: var(--text-low);
        }
        .pulse-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--info);
            position: relative;
        }
        .pulse-dot::after {
            content: '';
            position: absolute;
            inset: -4px;
            border-radius: 50%;
            border: 2px solid var(--info);
            opacity: 0.6;
            animation: pulse 1.8s ease-out infinite;
        }
        @keyframes pulse {
            0% {
                transform: scale(0.8);
                opacity: 0.6;
            }
            70% {
                transform: scale(1.6);
                opacity: 0;
            }
            100% {
                transform: scale(1.6);
                opacity: 0;
            }
        }
        .hero-ticker {
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            border-top: 1px solid rgba(92, 160, 255, 0.15);
            background: rgba(4, 8, 16, 0.6);
            overflow: hidden;
            padding: 12px 0;
            z-index: 3;
        }
        .ticker-track {
            display: flex;
            gap: 40px;
            white-space: nowrap;
            animation: tickerScroll 30s linear infinite;
            will-change: transform;
        }
        .ticker-track span {
            font-size: 13px;
            color: var(--text-low);
        }
        .ticker-track span::before {
            content: '◆ ';
            color: var(--accent);
            font-size: 8px;
            vertical-align: middle;
            margin-right: 10px;
        }
        @keyframes tickerScroll {
            0% {
                transform: translateX(0);
            }
            100% {
                transform: translateX(-50%);
            }
        }
        .news-section {
            background: var(--bg-base);
        }
        .news-card {
            display: flex;
            flex-direction: column;
            height: 100%;
            overflow: hidden;
        }
        .news-cover {
            width: 100%;
            aspect-ratio: 16/9;
            overflow: hidden;
            position: relative;
            background: linear-gradient(135deg, #0F1B33, #1A2D55);
        }
        .news-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .news-card:hover .news-cover img {
            transform: scale(1.04);
        }
        .news-cover.no-img::after {
            content: '\f1e3';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            position: absolute;
            inset: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 36px;
            color: var(--accent);
            background: linear-gradient(135deg, #0F1B33, #1A2D55);
        }
        .news-body {
            padding: 20px 22px 22px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .news-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 12px;
        }
        .news-date {
            font-size: 13px;
            color: var(--text-low);
            font-family: var(--font-title);
        }
        .news-title {
            font-size: 18px;
            font-weight: 600;
            line-height: 1.4;
            color: var(--text-hi);
            margin-bottom: 10px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-title a {
            color: var(--text-hi);
        }
        .news-title a:hover {
            color: var(--primary-strong);
        }
        .news-excerpt {
            font-size: 14px;
            line-height: 1.6;
            color: var(--text-mid);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 16px;
            flex: 1;
        }
        .news-footer {
            border-top: 1px solid rgba(92, 160, 255, 0.1);
            padding-top: 14px;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .empty-state {
            width: 100%;
            min-height: 160px;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 14px;
            background: var(--surface-glass);
            border: 1px solid var(--stroke-glass);
            border-radius: var(--radius);
            padding: 32px;
            text-align: center;
            color: var(--text-mid);
        }
        .empty-state i {
            font-size: 36px;
            color: var(--accent);
            opacity: 0.7;
        }
        .service-section {
            background: var(--bg-base);
        }
        .service-card {
            position: relative;
            padding: 28px 24px;
            height: 100%;
            overflow: hidden;
        }
        .service-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--accent), var(--primary));
            transition: width 0.4s ease;
            border-radius: 3px;
        }
        .service-card:hover::before {
            width: 100%;
        }
        .service-icon {
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: var(--surface-solid);
            border: 1px solid rgba(255, 107, 44, 0.5);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: var(--accent);
            margin-bottom: 16px;
        }
        .service-card h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-hi);
            margin-bottom: 10px;
        }
        .service-card p {
            font-size: 14px;
            line-height: 1.6;
            color: var(--text-mid);
        }
        .hot-tag {
            position: absolute;
            top: 14px;
            right: 14px;
            background: linear-gradient(135deg, var(--accent), #FF8E3C);
            color: #fff;
            font-size: 11px;
            font-weight: 600;
            padding: 3px 10px;
            border-radius: 999px;
            box-shadow: 0 2px 12px rgba(255, 107, 44, 0.35);
        }
        .compare-section {
            background: var(--bg-deep);
            padding: 80px 0;
        }
        .compare-card {
            background: var(--surface-glass);
            border: 1px solid var(--stroke-glass);
            border-radius: var(--radius);
            padding: 40px;
            backdrop-filter: blur(14px);
            position: relative;
            display: flex;
            align-items: stretch;
            gap: 0;
        }
        .compare-col {
            flex: 1;
            padding: 0 30px;
            position: relative;
        }
        .compare-col-left {
            border-right: 1px solid rgba(92, 160, 255, 0.15);
        }
        .compare-col-header {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 24px;
        }
        .compare-icon {
            width: 40px;
            height: 40px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
        }
        .compare-icon.traditional {
            background: rgba(107, 127, 163, 0.15);
            color: var(--text-low);
        }
        .compare-icon.modern {
            background: rgba(24, 119, 255, 0.15);
            color: var(--primary-strong);
        }
        .compare-col-header h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-hi);
        }
        .compare-item {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 0;
            border-bottom: 1px solid rgba(92, 160, 255, 0.08);
            font-size: 14px;
        }
        .compare-item:last-child {
            border-bottom: none;
        }
        .compare-status {
            width: 22px;
            height: 22px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 12px;
            flex-shrink: 0;
        }
        .compare-status.fail {
            background: rgba(107, 127, 163, 0.15);
            color: var(--text-low);
        }
        .compare-status.pass {
            background: rgba(0, 229, 207, 0.15);
            color: var(--info);
        }
        .vs-circle {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--surface-solid);
            border: 2px solid;
            border-image: linear-gradient(135deg, var(--primary), var(--accent)) 1;
            display: flex;
            align-items: center;
            justify-content: center;
            font-family: var(--font-title);
            font-weight: 700;
            font-size: 16px;
            color: var(--text-hi);
            position: absolute;
            left: 50%;
            top: 50%;
            transform: translate(-50%, -50%);
            z-index: 2;
            box-shadow: 0 4px 24px rgba(24, 119, 255, 0.3);
        }
        .compare-stats {
            display: flex;
            gap: 40px;
            justify-content: space-between;
            align-items: center;
            margin-top: 32px;
            flex-wrap: wrap;
        }
        .stat-item {
            text-align: center;
            padding: 16px 28px;
            background: rgba(18, 30, 55, 0.5);
            border: 1px solid rgba(92, 160, 255, 0.15);
            border-radius: 12px;
            flex: 1;
            min-width: 180px;
        }
        .stat-item .stat-num {
            font-family: var(--font-title);
            font-size: 30px;
            font-weight: 600;
            color: var(--info);
        }
        .stat-item .stat-label {
            font-size: 13px;
            color: var(--text-low);
            margin-top: 4px;
        }
        .faq-section {
            background: var(--bg-base);
        }
        .faq-wrap {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            border: 1px solid rgba(92, 160, 255, 0.12);
            border-radius: 14px;
            margin-bottom: 14px;
            background: rgba(18, 30, 55, 0.4);
            overflow: hidden;
            transition: border-color 0.2s;
        }
        .faq-item.active {
            border-color: rgba(0, 229, 207, 0.4);
        }
        .faq-question {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 18px 20px;
            cursor: pointer;
            user-select: none;
        }
        .faq-q-icon {
            width: 24px;
            height: 24px;
            border-radius: 50%;
            border: 1px solid rgba(61, 155, 255, 0.5);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 12px;
            color: var(--primary-strong);
            flex-shrink: 0;
            transition: all 0.2s;
        }
        .faq-item.active .faq-q-icon {
            background: var(--info);
            border-color: var(--info);
            color: #fff;
        }
        .faq-question h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-hi);
            flex: 1;
        }
        .faq-toggle-icon {
            font-size: 18px;
            color: var(--text-low);
            transition: transform 0.2s;
        }
        .faq-item.active .faq-toggle-icon {
            transform: rotate(45deg);
            color: var(--info);
        }
        .faq-answer {
            display: none;
            padding: 0 20px 18px;
            padding-left: 58px;
            font-size: 14px;
            line-height: 1.7;
            color: var(--text-mid);
        }
        .faq-item.active .faq-answer {
            display: block;
        }
        .contact-section {
            background: var(--bg-base);
            padding-bottom: var(--space-section);
        }
        .contact-card {
            background: var(--surface-glass);
            border: 1px solid var(--stroke-glass);
            border-radius: 20px;
            padding: 48px;
            backdrop-filter: blur(14px);
            position: relative;
            overflow: hidden;
        }
        .contact-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 2px;
            background: linear-gradient(90deg, var(--accent), var(--primary), var(--info));
        }
        .contact-left {
            padding-right: 30px;
        }
        .contact-left h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--text-hi);
            margin-bottom: 12px;
            font-family: var(--font-title);
        }
        .contact-left p {
            font-size: 15px;
            color: var(--text-mid);
            line-height: 1.7;
            margin-bottom: 20px;
        }
        .mini-chart {
            margin-top: 24px;
            border-radius: 12px;
            overflow: hidden;
        }
        .mini-chart .bar-row {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 10px;
        }
        .mini-chart .bar-label {
            font-size: 12px;
            color: var(--text-low);
            width: 70px;
            flex-shrink: 0;
        }
        .mini-chart .bar-track {
            flex: 1;
            height: 8px;
            border-radius: 4px;
            background: rgba(255, 255, 255, 0.06);
            overflow: hidden;
        }
        .mini-chart .bar-fill {
            height: 100%;
            border-radius: 4px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
        }
        .security-badge {
            position: absolute;
            top: 20px;
            right: 20px;
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 12px;
            color: var(--text-low);
            background: rgba(4, 8, 16, 0.5);
            border: 1px solid rgba(0, 229, 207, 0.2);
            border-radius: 999px;
            padding: 4px 12px;
        }
        .security-badge i {
            color: var(--info);
        }
        .form-group {
            margin-bottom: 18px;
        }
        .form-group label {
            display: block;
            font-size: 13px;
            color: var(--text-mid);
            margin-bottom: 6px;
            font-weight: 500;
        }
        .form-submit {
            width: 100%;
            height: 48px;
            margin-top: 6px;
        }
        .site-footer {
            background: var(--bg-deep);
            border-top: 1px solid rgba(92, 160, 255, 0.12);
            padding: 48px 0 32px;
            position: relative;
        }
        .site-footer::before {
            content: '';
            position: absolute;
            inset: 0;
            background: repeating-linear-gradient(45deg, transparent, transparent 20px, rgba(255, 255, 255, 0.02) 20px, rgba(255, 255, 255, 0.02) 21px);
            pointer-events: none;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            position: relative;
            z-index: 1;
        }
        .footer-brand .footer-logo {
            font-family: var(--font-title);
            font-size: 20px;
            font-weight: 700;
            color: var(--text-hi);
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 12px;
        }
        .footer-brand p {
            font-size: 14px;
            color: var(--text-low);
            line-height: 1.7;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-hi);
            margin-bottom: 16px;
            font-family: var(--font-title);
        }
        .footer-col ul {
            list-style: none;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul a {
            font-size: 14px;
            color: var(--text-low);
            transition: color 0.2s;
        }
        .footer-col ul a:hover {
            color: var(--accent);
        }
        .social-row {
            display: flex;
            gap: 12px;
        }
        .social-btn {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            border: 1px solid rgba(92, 160, 255, 0.25);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 15px;
            color: var(--text-mid);
            transition: all 0.2s;
            background: transparent;
        }
        .social-btn:hover {
            border-color: var(--primary);
            color: #fff;
            background: rgba(24, 119, 255, 0.15);
        }
        .footer-bottom {
            margin-top: 40px;
            padding-top: 24px;
            border-top: 1px solid rgba(92, 160, 255, 0.1);
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            position: relative;
            z-index: 1;
        }
        .footer-bottom p {
            font-size: 13px;
            color: var(--text-low);
        }
        .footer-bottom .legal a {
            font-size: 12px;
            color: var(--text-low);
            margin-left: 16px;
        }
        .footer-bottom .legal a:hover {
            color: #fff;
        }
        @media screen and (max-width: 1023px) {
            .main-nav {
                position: fixed;
                top: 66px;
                left: 0;
                right: 0;
                background: rgba(7, 13, 26, 0.97);
                border-bottom: 1px solid rgba(92, 160, 255, 0.15);
                padding: 20px;
                transform: translateY(-120%);
                transition: transform 0.3s ease;
                z-index: 99;
                backdrop-filter: blur(18px);
            }
            .main-nav.open {
                transform: translateY(0);
            }
            .main-nav ul {
                flex-direction: column;
                gap: 12px;
                align-items: flex-start;
            }
            .main-nav a {
                display: block;
                padding: 10px 0;
                font-size: 16px;
            }
            .nav-toggle {
                display: flex;
            }
            .countdown-badge {
                display: none;
            }
        }
        @media screen and (max-width: 639px) {
            .hero {
                padding: 44px 0 80px;
            }
            .hero h1 {
                font-size: 34px;
                line-height: 44px;
            }
            .hero-subtitle {
                font-size: 15px;
            }
            .hero-badges {
                flex-direction: column;
                align-items: flex-start;
            }
            .hero-actions .btn-primary,
            .hero-actions .btn-secondary {
                width: 100%;
            }
            .dashboard-card {
                margin-top: 24px;
                padding: 20px;
            }
            .metric-grid {
                gap: 12px;
            }
            .metric-number {
                font-size: 24px;
            }
            .section-header h2 {
                font-size: 24px;
            }
            .compare-card {
                flex-direction: column;
                padding: 24px;
            }
            .compare-col-left {
                border-right: none;
                border-bottom: 1px solid rgba(92, 160, 255, 0.15);
                padding-bottom: 20px;
                margin-bottom: 20px;
            }
            .compare-col {
                padding: 0;
            }
            .vs-circle {
                display: none;
            }
            .compare-stats {
                flex-direction: column;
                gap: 12px;
            }
            .contact-card {
                padding: 28px 20px;
            }
            .security-badge {
                position: static;
                display: inline-flex;
                margin-bottom: 12px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
        }
        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                animation-duration: 0.01ms !important;
                transition-duration: 0.01ms !important;
            }
        }

/* roulang page: category1 */
:root {
  --bg-base: #070D1A;
  --bg-deep: #040810;
  --surface-glass: rgba(18, 30, 55, 0.66);
  --surface-solid: #0F1B33;
  --stroke-glass: rgba(92, 160, 255, 0.28);
  --primary: #1877FF;
  --primary-strong: #3D9BFF;
  --accent: #FF6B2C;
  --accent-soft: rgba(255, 107, 44, 0.16);
  --info: #00E5CF;
  --text-hi: #F2F7FF;
  --text-mid: #B9C7E2;
  --text-low: #6B7FA3;
  --glow-blue: 0 0 0 1px rgba(61,155,255,0.25), 0 8px 40px rgba(24,119,255,0.22);
  --glow-accent: 0 0 0 1px rgba(255,107,44,0.35), 0 6px 42px rgba(255,107,44,0.3);
  --radius: 16px;
  --space-section: 92px;
}
*, *::before, *::after {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  margin: 0;
  font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans CJK SC', sans-serif;
  font-size: 16px;
  line-height: 1.65;
  background-color: var(--bg-base);
  color: var(--text-mid);
  background-image:
    radial-gradient(1px 1px at 20% 30%, rgba(255,255,255,0.12), transparent),
    radial-gradient(1px 1px at 70% 60%, rgba(0,229,207,0.08), transparent);
  background-size: 160px 160px;
}
img {
  max-width: 100%;
  display: block;
}
a {
  color: var(--primary-strong);
  text-decoration: none;
  transition: color 0.2s ease;
}
a:hover {
  color: var(--accent);
}
button {
  font-family: inherit;
  cursor: pointer;
}
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
/* ===== Header Nav ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 999;
  background: rgba(7, 13, 26, 0.82);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(92,160,255,0.15);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 66px;
  gap: 24px;
  max-width: 1200px;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  color: var(--text-hi);
  letter-spacing: 0.5px;
  white-space: nowrap;
}
.nav-logo:hover {
  color: var(--text-hi);
}
.logo-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 10px;
  background: linear-gradient(135deg, #FF6B2C, #1877FF);
  color: #fff;
  font-size: 17px;
  font-weight: 800;
  box-shadow: 0 0 16px rgba(255, 107, 44, 0.3);
}
.main-nav ul {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 6px;
}
.main-nav a {
  display: block;
  padding: 8px 14px;
  font-size: 14px;
  color: var(--text-mid);
  border-radius: 8px;
  transition: color 0.2s, background 0.2s;
  position: relative;
}
.main-nav a:hover {
  color: #fff;
  background: rgba(24, 119, 255, 0.08);
}
.main-nav a.active {
  color: #fff;
}
.main-nav a.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 14px;
  right: 14px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
}
.nav-right {
  display: flex;
  align-items: center;
  gap: 12px;
}
.countdown-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255,107,44,0.14);
  border: 1px solid rgba(255,107,44,0.32);
  border-radius: 999px;
  padding: 4px 12px;
  font-size: 12px;
  color: #FFB087;
  white-space: nowrap;
}
.countdown-badge i {
  font-size: 11px;
}
.cd-num {
  font-family: 'Rajdhani', 'Inter', sans-serif;
  font-weight: 600;
  letter-spacing: 0.5px;
  color: #FFB087;
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #FF4F1C, #FF8E3C);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 12px 24px;
  font-size: 15px;
  font-weight: 600;
  box-shadow: 0 4px 28px rgba(255, 107, 44, 0.38);
  transition: all 0.25s ease;
  line-height: 1.4;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 36px rgba(255, 107, 44, 0.5);
  color: #fff;
  filter: brightness(1.08);
}
.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 2px 12px rgba(255, 107, 44, 0.3);
}
.btn-primary.btn-sm {
  padding: 8px 18px;
  font-size: 14px;
  border-radius: 8px;
}
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  color: var(--primary-strong);
  border: 1px solid rgba(24, 119, 255, 0.5);
  border-radius: 8px;
  padding: 11px 22px;
  font-size: 15px;
  font-weight: 500;
  transition: all 0.25s ease;
  line-height: 1.4;
}
.btn-secondary:hover {
  background: rgba(24, 119, 255, 0.12);
  color: var(--primary-strong);
}
.btn-secondary:active {
  transform: translateY(1px);
}
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  background: transparent;
  border: none;
  padding: 8px;
  border-radius: 8px;
}
.nav-toggle span {
  display: block;
  height: 2px;
  width: 100%;
  background: #fff;
  border-radius: 2px;
}
/* ===== Category Hero ===== */
.cat-hero {
  position: relative;
  background: linear-gradient(180deg, #0A1324 0%, #070D1A 100%);
  padding: 40px 0 56px;
  overflow: hidden;
}
.cat-hero::before {
  content: '';
  position: absolute;
  top: -40%;
  left: 50%;
  transform: translateX(-50%);
  width: 700px;
  height: 400px;
  background: radial-gradient(ellipse, rgba(24,119,255,0.2), transparent 65%);
  pointer-events: none;
}
.cat-hero::after {
  content: '';
  position: absolute;
  right: -30px;
  top: 20px;
  width: 200px;
  height: 200px;
  background-image:
    linear-gradient(45deg, transparent 49%, rgba(255,255,255,0.03) 50%, transparent 51%),
    linear-gradient(135deg, transparent 49%, rgba(255,255,255,0.03) 50%, transparent 51%);
  background-size: 28px 28px;
  pointer-events: none;
}
.cat-hero .container {
  position: relative;
  z-index: 2;
  text-align: center;
}
.breadcrumb-line {
  font-size: 13px;
  color: var(--text-low);
  margin-bottom: 20px;
  letter-spacing: 0.3px;
}
.breadcrumb-line a {
  color: var(--text-low);
}
.breadcrumb-line a:hover {
  color: var(--primary-strong);
}
.breadcrumb-line .sep {
  margin: 0 8px;
  color: var(--text-low);
  opacity: 0.5;
}
.breadcrumb-line .current {
  color: var(--text-mid);
}
.cat-hero h1 {
  font-family: 'Rajdhani', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  font-size: 40px;
  font-weight: 700;
  color: var(--text-hi);
  margin: 0 0 12px;
  letter-spacing: 1px;
}
.cat-hero .sub-text {
  font-size: 15px;
  color: var(--text-mid);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.7;
}
.cat-hero .hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 20px;
  font-size: 12px;
  color: #9CC9FF;
  background: rgba(24,119,255,0.16);
  border: 1px solid rgba(24,119,255,0.3);
  border-radius: 999px;
  padding: 4px 14px;
}
.cat-hero .hero-badge i {
  color: var(--info);
  font-size: 10px;
}
/* ===== Category Content ===== */
.cat-main {
  padding: 60px 0 80px;
  background: var(--bg-base);
}
.cat-main .container {
  max-width: 1200px;
}
.cat-grid {
  display: flex;
  flex-wrap: wrap;
  margin: 0 -16px;
}
.cat-left {
  width: calc(66.666% - 32px);
  margin: 0 16px;
}
.cat-right {
  width: calc(33.333% - 32px);
  margin: 0 16px;
}
.cat-card {
  display: flex;
  gap: 24px;
  padding: 24px;
  background: var(--surface-glass);
  border: 1px solid var(--stroke-glass);
  border-radius: var(--radius);
  backdrop-filter: blur(14px);
  box-shadow: 0 16px 48px rgba(2, 8, 20, 0.5);
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease, background 0.3s ease;
  margin-bottom: 20px;
  position: relative;
  overflow: hidden;
}
.cat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0;
  transition: opacity 0.3s ease;
}
.cat-card:hover {
  background: rgba(24,119,255,0.06);
  transform: translateY(-4px);
  border-color: rgba(92,160,255,0.5);
  box-shadow: var(--glow-blue);
}
.cat-card:hover::before {
  opacity: 1;
}
.cat-card-img {
  flex: 0 0 200px;
  border-radius: 12px;
  overflow: hidden;
  background: var(--surface-solid);
  min-height: 150px;
  position: relative;
}
.cat-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.cat-card:hover .cat-card-img img {
  transform: scale(1.03);
}
.cat-card-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.cat-card-tag {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 12px;
  color: #9CC9FF;
  background: rgba(24,119,255,0.16);
  border: 1px solid rgba(24,119,255,0.3);
  border-radius: 999px;
  padding: 2px 10px;
  margin-bottom: 10px;
  width: fit-content;
}
.cat-card-tag i {
  color: var(--accent);
  font-size: 8px;
}
.cat-card h2 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-hi);
  margin: 0 0 8px;
  line-height: 1.4;
}
.cat-card p {
  font-size: 14px;
  color: var(--text-mid);
  margin: 0 0 12px;
  line-height: 1.65;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.cat-card-link {
  font-size: 14px;
  color: var(--primary-strong);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap 0.25s ease;
}
.cat-card-link:hover {
  color: var(--accent);
  gap: 8px;
}
/* ===== Sidebar ===== */
.sidebar-card {
  background: var(--surface-glass);
  border: 1px solid var(--stroke-glass);
  border-radius: var(--radius);
  backdrop-filter: blur(14px);
  box-shadow: 0 16px 48px rgba(2, 8, 20, 0.5);
  padding: 24px;
  margin-bottom: 20px;
}
.sidebar-card h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-hi);
  margin: 0 0 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.sidebar-card h3 i {
  color: var(--accent);
  font-size: 14px;
}
.sidebar-card p {
  font-size: 14px;
  color: var(--text-mid);
  line-height: 1.7;
  margin: 0 0 16px;
}
.sidebar-stats {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 10px;
  border-top: 1px solid rgba(92,160,255,0.15);
  padding-top: 16px;
}
.sidebar-stat {
  text-align: center;
}
.sidebar-stat .num {
  display: block;
  font-family: 'Rajdhani', 'Inter', sans-serif;
  font-size: 22px;
  font-weight: 600;
  color: var(--info);
}
.sidebar-stat .label {
  font-size: 12px;
  color: var(--text-low);
  margin-top: 2px;
}
.sidebar-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
}
.sidebar-nav li {
  border-bottom: 1px solid rgba(92,160,255,0.1);
}
.sidebar-nav li:last-child {
  border-bottom: none;
}
.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 10px;
  font-size: 14px;
  color: var(--text-mid);
  border-radius: 6px;
  transition: color 0.2s, background 0.2s, padding-left 0.2s;
}
.sidebar-nav a i {
  font-size: 10px;
  color: var(--text-low);
  transition: color 0.2s;
}
.sidebar-nav a:hover {
  color: var(--accent);
  background: rgba(255,107,44,0.06);
  padding-left: 14px;
}
.sidebar-nav a:hover i {
  color: var(--accent);
}
.sidebar-nav a.active-link {
  color: var(--accent);
  font-weight: 600;
  background: rgba(255,107,44,0.08);
}
.sidebar-nav a.active-link i {
  color: var(--accent);
}
/* ===== CTA Section ===== */
.cat-cta {
  padding: 0 0 80px;
  background: var(--bg-base);
}
.cat-cta .container {
  max-width: 1200px;
}
.cta-card {
  background: var(--surface-glass);
  border: 1px solid var(--stroke-glass);
  border-radius: var(--radius);
  backdrop-filter: blur(14px);
  box-shadow: 0 16px 48px rgba(2, 8, 20, 0.5);
  padding: 44px 48px;
  text-align: center;
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 180px;
}
.cta-card::after {
  content: '';
  position: absolute;
  top: -2px;
  left: -2px;
  right: -2px;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--primary), var(--info));
  opacity: 0.5;
  border-radius: var(--radius) var(--radius) 0 0;
}
.cta-card h2 {
  font-family: 'Rajdhani', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  font-size: 22px;
  font-weight: 600;
  color: var(--text-hi);
  margin: 0 0 8px;
}
.cta-card p {
  font-size: 14px;
  color: var(--text-mid);
  margin: 0 0 20px;
}
.cta-card .cta-row {
  display: flex;
  align-items: center;
  gap: 14px;
}
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--info);
  background: rgba(0,229,207,0.1);
  border: 1px solid rgba(0,229,207,0.3);
  border-radius: 999px;
  padding: 4px 12px;
}
.status-badge i {
  font-size: 9px;
}
/* ===== Footer ===== */
.site-footer {
  background: var(--bg-deep);
  border-top: 1px solid rgba(92,160,255,0.12);
  padding: 48px 0 32px;
  position: relative;
}
.site-footer::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 100%;
  background-image: repeating-linear-gradient(45deg, transparent 0, transparent 20px, rgba(255,255,255,0.03) 20px, rgba(255,255,255,0.03) 22px);
  opacity: 0.3;
  pointer-events: none;
}
.site-footer .container {
  position: relative;
  z-index: 2;
  max-width: 1200px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 36px;
  margin-bottom: 36px;
}
.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  font-weight: 700;
  color: var(--text-hi);
  margin-bottom: 12px;
}
.footer-logo .logo-icon {
  width: 28px;
  height: 28px;
  font-size: 14px;
  border-radius: 8px;
}
.footer-brand p {
  font-size: 14px;
  color: var(--text-low);
  line-height: 1.7;
  margin: 0;
  max-width: 320px;
}
.footer-col h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-hi);
  margin: 0 0 14px;
}
.footer-col ul {
  list-style: none;
  margin: 0;
  padding: 0;
}
.footer-col li {
  margin-bottom: 8px;
}
.footer-col a {
  font-size: 14px;
  color: var(--text-low);
  transition: color 0.2s;
}
.footer-col a:hover {
  color: var(--accent);
}
.social-row {
  display: flex;
  gap: 10px;
}
.social-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 10px;
  border: 1px solid rgba(92,160,255,0.25);
  color: var(--text-mid);
  font-size: 16px;
  background: transparent;
  transition: all 0.2s ease;
}
.social-btn:hover {
  background: rgba(24,119,255,0.12);
  border-color: rgba(24,119,255,0.5);
  color: #fff;
}
.footer-bottom {
  border-top: 1px solid rgba(92,160,255,0.1);
  padding-top: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-bottom p {
  font-size: 13px;
  color: var(--text-low);
  margin: 0;
}
.legal {
  display: flex;
  gap: 20px;
}
.legal a {
  font-size: 13px;
  color: var(--text-low);
}
.legal a:hover {
  color: var(--text-mid);
}
/* ===== Responsive ===== */
@media (max-width: 1023px) {
  .cat-left,
  .cat-right {
    width: calc(100% - 32px);
  }
  .cat-right {
    margin-top: 8px;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .site-header .container {
    gap: 12px;
  }
  .main-nav {
    display: none;
    position: absolute;
    top: 66px;
    left: 0;
    right: 0;
    background: rgba(7,13,26,0.96);
    border-bottom: 1px solid rgba(92,160,255,0.15);
    padding: 12px 24px;
  }
  .main-nav.open {
    display: block;
  }
  .main-nav ul {
    flex-direction: column;
    gap: 0;
  }
  .main-nav a {
    padding: 12px 10px;
    border-radius: 6px;
    font-size: 15px;
  }
  .main-nav a.active::after {
    display: none;
  }
  .main-nav a.active {
    background: rgba(24,119,255,0.12);
    color: #fff;
  }
  .nav-toggle {
    display: flex;
  }
  .countdown-badge {
    display: none;
  }
  .cat-card {
    flex-direction: column;
    gap: 16px;
    padding: 20px;
  }
  .cat-card-img {
    flex: 0 0 auto;
    width: 100%;
    height: 180px;
  }
}
@media (max-width: 639px) {
  :root {
    --space-section: 60px;
  }
  .container {
    padding: 0 16px;
  }
  .cat-hero h1 {
    font-size: 28px;
  }
  .cat-hero {
    padding: 32px 0 40px;
  }
  .cat-main {
    padding: 40px 0 60px;
  }
  .cat-left,
  .cat-right {
    width: calc(100% - 32px);
    margin: 0 16px;
  }
  .cat-card {
    padding: 16px;
  }
  .cat-card-img {
    height: 140px;
  }
  .cat-card h2 {
    font-size: 16px;
  }
  .cat-card p {
    font-size: 13px;
  }
  .cta-card {
    padding: 32px 20px;
  }
  .cta-card .cta-row {
    flex-direction: column;
    width: 100%;
  }
  .cta-card .cta-row .btn-primary {
    width: 100%;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
  .nav-right .btn-primary {
    display: none;
  }
  .nav-logo {
    font-size: 17px;
  }
  .sidebar-stats {
    grid-template-columns: 1fr 1fr 1fr;
    gap: 4px;
  }
  .sidebar-stat .num {
    font-size: 18px;
  }
  .sidebar-stat .label {
    font-size: 11px;
  }
}
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--info);
  outline-offset: 2px;
}

/* roulang page: category2 */
/* ===== 设计变量 ===== */
        :root {
            --bg-base: #070D1A;
            --bg-deep: #040810;
            --surface-glass: rgba(18, 30, 55, 0.66);
            --surface-solid: #0F1B33;
            --stroke-glass: rgba(92, 160, 255, 0.28);
            --primary: #1877FF;
            --primary-strong: #3D9BFF;
            --accent: #FF6B2C;
            --accent-soft: rgba(255, 107, 44, 0.16);
            --info: #00E5CF;
            --text-hi: #F2F7FF;
            --text-mid: #B9C7E2;
            --text-low: #6B7FA3;
            --radius: 16px;
            --space-section: 92px;
            --transition: 0.3s ease;
        }

        /* ===== Reset / Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans CJK SC', sans-serif;
            background: var(--bg-base);
            color: var(--text-mid);
            line-height: 1.65;
            font-size: 15px;
            min-height: 100vh;
            background-image:
                radial-gradient(1px 1px at 20% 30%, rgba(255, 255, 255, 0.12), transparent),
                radial-gradient(1px 1px at 70% 60%, rgba(0, 229, 207, 0.08), transparent);
            background-size: 160px 160px;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            color: var(--primary-strong);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--accent);
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }
        h1,
        h2,
        h3,
        h4,
        h5 {
            font-family: 'Rajdhani', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans CJK SC', sans-serif;
            color: var(--text-hi);
            line-height: 1.2;
            font-weight: 700;
        }
        :focus-visible {
            outline: 2px solid var(--info) !important;
            outline-offset: 2px;
        }

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

        /* ===== 导航 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(7, 13, 26, 0.82);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(92, 160, 255, 0.15);
            height: 66px;
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 66px;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-family: 'Rajdhani', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            font-size: 20px;
            font-weight: 700;
            color: var(--text-hi);
            letter-spacing: 0.5px;
        }
        .nav-logo:hover {
            color: var(--text-hi);
        }
        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 28px;
            height: 28px;
            border-radius: 8px;
            background: linear-gradient(135deg, #1877FF, #FF6B2C);
            color: #fff;
            font-size: 15px;
            font-weight: 700;
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 6px;
            margin: 0;
        }
        .main-nav ul li a {
            display: block;
            padding: 8px 16px;
            color: var(--text-mid);
            font-size: 14px;
            border-radius: 6px;
            position: relative;
            transition: color var(--transition), background var(--transition);
        }
        .main-nav ul li a:hover {
            color: #fff;
            background: rgba(24, 119, 255, 0.08);
        }
        .main-nav ul li a.active {
            color: #fff;
            background: rgba(24, 119, 255, 0.1);
        }
        .main-nav ul li a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 16px;
            right: 16px;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
        }
        .nav-right {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .countdown-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(255, 107, 44, 0.14);
            border: 1px solid rgba(255, 107, 44, 0.32);
            border-radius: 999px;
            padding: 4px 12px;
            font-size: 12px;
            color: #FFB087;
            white-space: nowrap;
        }
        .countdown-badge .cd-num {
            font-family: 'Rajdhani', monospace;
            font-weight: 600;
            color: #fff;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, #FF4F1C, #FF8E3C);
            color: #fff;
            border: none;
            padding: 14px 30px;
            border-radius: 8px;
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            box-shadow: 0 4px 28px rgba(255, 107, 44, 0.38);
            transition: transform var(--transition), box-shadow var(--transition), filter var(--transition);
        }
        .btn-primary:hover {
            filter: brightness(1.08);
            transform: translateY(-2px);
            box-shadow: 0 8px 36px rgba(255, 107, 44, 0.5);
            color: #fff;
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 16px rgba(255, 107, 44, 0.3);
        }
        .btn-sm {
            padding: 10px 20px;
            font-size: 14px;
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: transparent;
            border: 1px solid rgba(61, 155, 255, 0.5);
            color: var(--primary-strong);
            padding: 14px 30px;
            border-radius: 8px;
            font-size: 15px;
            font-weight: 500;
            cursor: pointer;
            transition: background var(--transition), transform var(--transition);
        }
        .btn-secondary:hover {
            background: rgba(24, 119, 255, 0.12);
            color: #fff;
            transform: translateY(-1px);
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: transparent;
            border: none;
            padding: 10px;
            cursor: pointer;
        }
        .nav-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background: #fff;
            border-radius: 2px;
            transition: transform var(--transition), opacity var(--transition);
        }

        /* ===== 分类 Hero ===== */
        .category-hero {
            background:
                radial-gradient(800px 400px at 50% 0%, rgba(255, 107, 44, 0.14), transparent 60%),
                linear-gradient(180deg, #0A1324 0%, #070D1A 100%);
            padding: 48px 0 56px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            top: 0;
            right: -60px;
            width: 260px;
            height: 260px;
            background: linear-gradient(120deg, transparent 45%, rgba(255, 255, 255, 0.04) 46%, transparent 55%);
            transform: rotate(20deg);
            pointer-events: none;
        }
        .category-hero .breadcrumb {
            font-size: 13px;
            color: var(--text-low);
            margin-bottom: 24px;
            display: flex;
            justify-content: center;
            gap: 8px;
        }
        .category-hero .breadcrumb a {
            color: var(--text-low);
            transition: color var(--transition);
        }
        .category-hero .breadcrumb a:hover {
            color: var(--accent);
        }
        .category-hero .breadcrumb span:last-child {
            color: var(--text-hi);
        }
        .category-hero h1 {
            font-size: 28px;
            letter-spacing: 1px;
            margin-bottom: 12px;
            background: linear-gradient(135deg, #fff 40%, #A6C8FF 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .category-hero .hero-sub {
            font-size: 14px;
            color: var(--text-mid);
            max-width: 600px;
            margin: 0 auto;
            line-height: 1.6;
        }

        /* ===== 分类内容区 ===== */
        .category-main {
            padding: 80px 0 60px;
        }
        .cat-section-header {
            display: flex;
            align-items: center;
            gap: 14px;
            margin-bottom: 36px;
        }
        .cat-section-header .cat-tag {
            display: inline-flex;
            align-items: center;
            padding: 4px 12px;
            background: rgba(255, 107, 44, 0.12);
            border: 1px solid rgba(255, 107, 44, 0.3);
            border-radius: 999px;
            font-size: 12px;
            color: #FFB087;
            letter-spacing: 0.5px;
        }
        .cat-section-header h2 {
            font-size: 30px;
            margin: 0;
        }
        .cat-service-card {
            display: flex;
            gap: 20px;
            background: var(--surface-glass);
            border: 1px solid var(--stroke-glass);
            border-radius: var(--radius);
            padding: 20px;
            margin-bottom: 20px;
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            box-shadow: 0 16px 48px rgba(2, 8, 20, 0.35);
            transition: transform var(--transition), border-color var(--transition), background var(--transition);
        }
        .cat-service-card:hover {
            transform: translateY(-4px);
            border-color: rgba(92, 160, 255, 0.5);
            background: rgba(24, 119, 255, 0.06);
            box-shadow: 0 0 0 1px rgba(61, 155, 255, 0.25), 0 8px 40px rgba(24, 119, 255, 0.22);
        }
        .cat-card-img {
            flex: 0 0 120px;
            width: 120px;
            border-radius: 12px;
            overflow: hidden;
        }
        .cat-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s;
        }
        .cat-service-card:hover .cat-card-img img {
            transform: scale(1.03);
        }
        .cat-card-body {
            flex: 1;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        .cat-card-body h3 {
            font-size: 18px;
            margin-bottom: 6px;
            color: var(--text-hi);
        }
        .cat-card-body p {
            font-size: 14px;
            color: var(--text-mid);
            line-height: 1.6;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .text-link {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 14px;
            color: var(--primary-strong);
            font-weight: 500;
            transition: gap var(--transition), color var(--transition);
        }
        .text-link:hover {
            gap: 8px;
            color: var(--accent);
        }

        /* ===== 侧边栏 ===== */
        .sidebar {
            margin-left: 16px;
        }
        .side-card {
            background: var(--surface-glass);
            border: 1px solid var(--stroke-glass);
            border-radius: var(--radius);
            padding: 22px;
            margin-bottom: 20px;
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            box-shadow: 0 16px 48px rgba(2, 8, 20, 0.4);
        }
        .side-card h3 {
            font-size: 18px;
            margin-bottom: 10px;
            position: relative;
            padding-left: 12px;
        }
        .side-card h3::before {
            content: '';
            position: absolute;
            left: 0;
            top: 4px;
            bottom: 4px;
            width: 3px;
            background: var(--accent);
            border-radius: 2px;
        }
        .side-card p {
            font-size: 14px;
            color: var(--text-mid);
            line-height: 1.65;
            margin-bottom: 16px;
        }
        .side-metrics {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 12px;
        }
        .side-metric {
            background: rgba(24, 119, 255, 0.08);
            border: 1px solid rgba(92, 160, 255, 0.18);
            border-radius: 12px;
            padding: 12px;
            text-align: center;
        }
        .side-metric .metric-num {
            display: block;
            font-family: 'Rajdhani', sans-serif;
            font-size: 26px;
            font-weight: 600;
            color: var(--info);
            line-height: 1.1;
        }
        .side-metric .metric-label {
            font-size: 12px;
            color: var(--text-low);
            display: block;
            margin-top: 4px;
        }
        .side-nav {
            list-style: none;
        }
        .side-nav li {
            border-bottom: 1px solid rgba(92, 160, 255, 0.12);
        }
        .side-nav li:last-child {
            border-bottom: none;
        }
        .side-nav a {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 12px 8px;
            color: var(--text-mid);
            font-size: 14px;
            transition: color var(--transition), padding-left var(--transition);
        }
        .side-nav a::before {
            content: '→';
            color: var(--text-low);
            font-size: 12px;
            transition: color var(--transition);
        }
        .side-nav a:hover {
            color: var(--accent);
            padding-left: 14px;
        }
        .side-nav li.current a {
            color: var(--accent);
            font-weight: 600;
            background: rgba(255, 107, 44, 0.06);
            border-radius: 8px;
        }
        .side-nav li.current a::before {
            color: var(--accent);
        }

        /* ===== 数据指标带 ===== */
        .metrics-strip {
            background: var(--bg-deep);
            padding: 60px 0;
            border-top: 1px solid rgba(92, 160, 255, 0.08);
            border-bottom: 1px solid rgba(92, 160, 255, 0.08);
        }
        .metrics-strip .row {
            display: flex;
            flex-wrap: wrap;
            gap: 24px 0;
        }
        .metric-block {
            text-align: center;
            padding: 20px;
        }
        .metric-block .metric-icon {
            width: 44px;
            height: 44px;
            margin: 0 auto 12px;
            border-radius: 12px;
            background: rgba(24, 119, 255, 0.1);
            border: 1px solid rgba(92, 160, 255, 0.2);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--info);
            font-size: 18px;
        }
        .metric-block .metric-value {
            font-family: 'Rajdhani', sans-serif;
            font-size: 40px;
            font-weight: 600;
            color: #fff;
            line-height: 1.1;
            text-shadow: 0 0 30px rgba(0, 229, 207, 0.3);
        }
        .metric-block .metric-value::after {
            content: '';
            display: block;
            width: 24px;
            height: 2px;
            background: var(--accent);
            margin: 8px auto 0;
        }
        .metric-block .metric-desc {
            font-size: 14px;
            color: var(--text-low);
            margin-top: 8px;
        }

        /* ===== 适用场景 ===== */
        .scenarios {
            padding: var(--space-section) 0;
        }
        .section-head {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-head h2 {
            font-size: 30px;
            margin-bottom: 10px;
        }
        .section-head p {
            font-size: 15px;
            color: var(--text-low);
            max-width: 560px;
            margin: 0 auto;
        }
        .scenario-card {
            background: var(--surface-glass);
            border: 1px solid var(--stroke-glass);
            border-radius: var(--radius);
            padding: 26px 22px;
            text-align: center;
            height: 100%;
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            transition: transform var(--transition), border-color var(--transition);
        }
        .scenario-card:hover {
            transform: translateY(-4px);
            border-color: rgba(92, 160, 255, 0.5);
            box-shadow: 0 0 0 1px rgba(61, 155, 255, 0.2), 0 8px 40px rgba(24, 119, 255, 0.2);
        }
        .scenario-card .scenario-icon {
            width: 52px;
            height: 52px;
            margin: 0 auto 16px;
            border-radius: 14px;
            background: linear-gradient(135deg, rgba(24, 119, 255, 0.15), rgba(255, 107, 44, 0.1));
            border: 1px solid rgba(255, 107, 44, 0.2);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent);
            font-size: 20px;
        }
        .scenario-card h3 {
            font-size: 18px;
            margin-bottom: 10px;
        }
        .scenario-card p {
            font-size: 14px;
            color: var(--text-mid);
            line-height: 1.6;
        }

        /* ===== 分析流程 ===== */
        .process-section {
            background: var(--bg-deep);
            padding: var(--space-section) 0;
            position: relative;
        }
        .process-step {
            text-align: center;
            padding: 20px 16px;
            position: relative;
        }
        .process-step .step-num {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 56px;
            height: 56px;
            margin: 0 auto 16px;
            border-radius: 50%;
            font-family: 'Rajdhani', sans-serif;
            font-size: 24px;
            font-weight: 700;
            color: var(--accent);
            background: rgba(255, 107, 44, 0.1);
            border: 2px solid rgba(255, 107, 44, 0.4);
            box-shadow: 0 0 24px rgba(255, 107, 44, 0.1);
        }
        .process-step h3 {
            font-size: 17px;
            margin-bottom: 8px;
        }
        .process-step p {
            font-size: 13px;
            color: var(--text-low);
            line-height: 1.6;
        }
        .process-step::after {
            content: '';
            position: absolute;
            top: 48px;
            right: -24px;
            width: 48px;
            height: 2px;
            background: linear-gradient(90deg, rgba(255, 107, 44, 0.5), transparent);
        }
        .process-step:last-child::after {
            display: none;
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: var(--space-section) 0 60px;
        }
        .faq-wrap {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--surface-glass);
            border: 1px solid var(--stroke-glass);
            border-radius: 12px;
            margin-bottom: 14px;
            overflow: hidden;
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            transition: border-color var(--transition);
        }
        .faq-item.active {
            border-color: rgba(0, 229, 207, 0.4);
        }
        .faq-question {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 18px 20px;
            cursor: pointer;
            user-select: none;
        }
        .faq-question .faq-icon {
            width: 24px;
            height: 24px;
            border-radius: 50%;
            border: 1px solid rgba(61, 155, 255, 0.5);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 12px;
            color: var(--primary-strong);
            flex-shrink: 0;
            transition: background var(--transition), color var(--transition), border-color var(--transition);
        }
        .faq-item.active .faq-icon {
            background: var(--info);
            border-color: var(--info);
            color: #041;
        }
        .faq-question h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-hi);
            margin: 0;
            flex: 1;
        }
        .faq-question .faq-toggle {
            color: var(--text-low);
            font-size: 14px;
            transition: transform var(--transition), color var(--transition);
        }
        .faq-item.active .faq-toggle {
            transform: rotate(45deg);
            color: var(--info);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.2s ease, padding 0.2s ease;
        }
        .faq-answer-inner {
            padding: 0 20px 18px 56px;
            font-size: 14px;
            color: var(--text-mid);
            line-height: 1.7;
        }

        /* ===== CTA 条 ===== */
        .cta-band {
            padding: 0 0 80px;
        }
        .cta-card {
            background: var(--surface-glass);
            border: 1px solid var(--stroke-glass);
            border-radius: var(--radius);
            padding: 48px;
            text-align: center;
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            box-shadow: 0 16px 60px rgba(2, 8, 20, 0.5);
            position: relative;
            overflow: hidden;
        }
        .cta-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 2px;
            background: linear-gradient(90deg, transparent, var(--accent), transparent);
        }
        .cta-card h2 {
            font-size: 20px;
            margin-bottom: 10px;
        }
        .cta-card p {
            font-size: 14px;
            color: var(--text-mid);
            margin-bottom: 24px;
        }
        .cta-actions {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .status-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(0, 229, 207, 0.1);
            border: 1px solid rgba(0, 229, 207, 0.35);
            border-radius: 999px;
            padding: 6px 16px;
            font-size: 13px;
            color: var(--info);
        }
        .status-badge i {
            font-size: 10px;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-deep);
            border-top: 1px solid rgba(92, 160, 255, 0.15);
            padding: 48px 0 32px;
            background-image: repeating-linear-gradient(45deg, transparent, transparent 20px, rgba(255, 255, 255, 0.015) 20px, rgba(255, 255, 255, 0.015) 22px);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 36px;
        }
        .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-family: 'Rajdhani', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            font-size: 20px;
            font-weight: 700;
            color: var(--text-hi);
            margin-bottom: 10px;
        }
        .footer-brand p {
            font-size: 14px;
            color: var(--text-low);
            line-height: 1.6;
            max-width: 280px;
        }
        .footer-col h4 {
            font-size: 16px;
            color: var(--text-hi);
            margin-bottom: 16px;
            font-weight: 600;
        }
        .footer-col ul {
            list-style: none;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul li a {
            font-size: 14px;
            color: var(--text-low);
            transition: color var(--transition), padding-left var(--transition);
        }
        .footer-col ul li a:hover {
            color: #fff;
            padding-left: 4px;
        }
        .social-row {
            display: flex;
            gap: 10px;
        }
        .social-btn {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 10px;
            border: 1px solid rgba(92, 160, 255, 0.3);
            color: var(--text-mid);
            font-size: 16px;
            transition: background var(--transition), color var(--transition), border-color var(--transition), transform var(--transition);
        }
        .social-btn:hover {
            background: rgba(255, 107, 44, 0.12);
            border-color: rgba(255, 107, 44, 0.4);
            color: var(--accent);
            transform: translateY(-2px);
        }
        .footer-bottom {
            border-top: 1px solid rgba(92, 160, 255, 0.12);
            padding-top: 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-bottom p {
            font-size: 13px;
            color: var(--text-low);
        }
        .legal {
            display: flex;
            gap: 20px;
        }
        .legal a {
            font-size: 12px;
            color: var(--text-low);
        }
        .legal a:hover {
            color: var(--accent);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1023px) {
            .container {
                padding: 0 20px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .sidebar {
                margin-left: 0;
                margin-top: 32px;
            }
            .process-step::after {
                display: none;
            }
        }
        @media (max-width: 640px) {
            .container {
                padding: 0 16px;
            }
            .main-nav {
                position: fixed;
                top: 66px;
                left: 0;
                right: 0;
                background: rgba(7, 13, 26, 0.97);
                backdrop-filter: blur(18px);
                -webkit-backdrop-filter: blur(18px);
                flex-direction: column;
                padding: 16px 20px;
                display: none;
                border-bottom: 1px solid rgba(92, 160, 255, 0.2);
                max-height: calc(100vh - 66px);
                overflow-y: auto;
                z-index: 99;
            }
            .main-nav.open {
                display: block;
            }
            .main-nav ul {
                flex-direction: column;
                gap: 4px;
            }
            .main-nav ul li a {
                padding: 14px 16px;
                border-radius: 8px;
            }
            .main-nav ul li a.active::after {
                left: 16px;
                right: auto;
                width: 3px;
                height: 20px;
                top: 50%;
                transform: translateY(-50%);
                border-radius: 2px;
            }
            .nav-toggle {
                display: flex;
            }
            .countdown-badge {
                display: none;
            }
            .category-hero {
                padding: 36px 0 44px;
            }
            .category-hero h1 {
                font-size: 24px;
            }
            .category-hero .hero-sub {
                font-size: 13px;
            }
            .cat-section-header {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
            .cat-section-header h2 {
                font-size: 24px;
            }
            .cat-service-card {
                flex-direction: column;
                padding: 16px;
            }
            .cat-card-img {
                width: 100%;
                flex-basis: auto;
                height: 140px;
            }
            .cat-card-body h3 {
                font-size: 16px;
            }
            .cat-card-body p {
                font-size: 13px;
            }
            .metric-block .metric-value {
                font-size: 30px;
            }
            .scenario-card,
            .process-step {
                margin-bottom: 16px;
            }
            .cta-card {
                padding: 32px 20px;
            }
            .cta-actions {
                flex-direction: column;
            }
            .cta-actions .btn-primary {
                width: 100%;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .faq-question h3 {
                font-size: 14px;
            }
            .faq-answer-inner {
                padding-left: 20px;
                font-size: 13px;
            }
        }

/* roulang page: article */
/* ========== 设计变量 ========== */
        :root {
            --bg-base: #070D1A;
            --bg-deep: #040810;
            --surface-glass: rgba(18, 30, 55, 0.66);
            --surface-solid: #0F1B33;
            --stroke-glass: rgba(92, 160, 255, 0.28);
            --primary: #1877FF;
            --primary-strong: #3D9BFF;
            --accent: #FF6B2C;
            --accent-soft: rgba(255, 107, 44, 0.16);
            --info: #00E5CF;
            --text-hi: #F2F7FF;
            --text-mid: #B9C7E2;
            --text-low: #6B7FA3;
            --gradient-hero: radial-gradient(1200px 600px at 75% -10%, rgba(24,119,255,0.28), transparent 60%), linear-gradient(180deg, #0A1324 0%, #070D1A 100%);
            --glow-blue: 0 0 0 1px rgba(61,155,255,0.25), 0 8px 40px rgba(24,119,255,0.22);
            --glow-accent: 0 0 0 1px rgba(255,107,44,0.35), 0 6px 42px rgba(255,107,44,0.3);
            --radius: 16px;
            --space-section: 92px;
        }

        /* ========== 基础重置 ========== */
        *, *::before, *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans CJK SC', sans-serif;
            background-color: var(--bg-base);
            background-image:
                radial-gradient(1px 1px at 20% 30%, rgba(255,255,255,0.12), transparent),
                radial-gradient(1px 1px at 70% 60%, rgba(0,229,207,0.08), transparent);
            color: var(--text-mid);
            line-height: 1.65;
            font-size: 16px;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: var(--primary-strong);
            text-decoration: none;
            transition: color 0.25s ease;
        }
        a:hover {
            color: var(--accent);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        ul, ol {
            list-style: none;
        }
        button, input, select, textarea {
            font-family: inherit;
        }
        .row {
            max-width: 1200px;
            margin-right: auto;
            margin-left: auto;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 640px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ========== 阅读进度条 ========== */
        .reading-progress {
            position: fixed;
            top: 0;
            left: 0;
            height: 2px;
            width: 0%;
            background: linear-gradient(90deg, var(--accent), #FFB087);
            z-index: 9999;
            transition: width 0.08s linear;
        }

        /* ========== 导航 ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(7, 13, 26, 0.82);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(92, 160, 255, 0.15);
            height: 66px;
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 66px;
            gap: 20px;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 9px;
            font-size: 20px;
            font-weight: 700;
            color: var(--text-hi);
            letter-spacing: 1px;
            flex-shrink: 0;
        }
        .nav-logo:hover {
            color: var(--text-hi);
        }
        .logo-icon {
            width: 28px;
            height: 28px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            border-radius: 8px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            font-weight: 700;
            color: #fff;
            box-shadow: 0 0 16px rgba(24,119,255,0.35);
        }
        .main-nav ul {
            display: flex;
            gap: 28px;
        }
        .main-nav a {
            color: var(--text-mid);
            font-size: 14px;
            font-weight: 500;
            padding: 8px 2px;
            position: relative;
            display: inline-block;
            transition: color 0.25s ease;
        }
        .main-nav a:hover,
        .main-nav a.active {
            color: #fff;
        }
        .main-nav a.active::after {
            content: '';
            position: absolute;
            left: 0;
            right: 0;
            bottom: 0;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
            box-shadow: 0 0 8px rgba(255, 107, 44, 0.5);
        }
        .nav-right {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-shrink: 0;
        }
        .countdown-badge {
            background: rgba(255, 107, 44, 0.14);
            border: 1px solid rgba(255, 107, 44, 0.32);
            border-radius: 999px;
            padding: 5px 14px;
            font-size: 12px;
            color: #FFB087;
            font-family: 'Rajdhani', 'Inter', sans-serif;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            white-space: nowrap;
        }
        .countdown-badge .cd-num {
            font-weight: 700;
            color: #FFB087;
            font-size: 13px;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: 0;
            cursor: pointer;
            padding: 6px;
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            flex-direction: column;
            gap: 5px;
        }
        .nav-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background: #fff;
            border-radius: 2px;
            transition: all 0.3s ease;
        }
        .nav-toggle.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .nav-toggle.open span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* ========== 按钮体系 ========== */
        .btn-primary {
            background: linear-gradient(135deg, #FF4F1C, #FF8E3C);
            color: #fff;
            box-shadow: 0 4px 28px rgba(255, 107, 44, 0.38);
            border-radius: 8px;
            padding: 13px 30px;
            font-size: 15px;
            font-weight: 600;
            transition: all 0.3s ease;
            border: none;
            cursor: pointer;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            letter-spacing: 0.5px;
            text-align: center;
            line-height: 1;
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 38px rgba(255, 107, 44, 0.5);
            filter: brightness(1.08);
            color: #fff;
        }
        .btn-primary:active {
            transform: translateY(-1px);
            box-shadow: 0 3px 18px rgba(255, 107, 44, 0.35);
        }
        .btn-primary.btn-sm {
            padding: 10px 20px;
            font-size: 14px;
        }
        .btn-secondary {
            background: transparent;
            border: 1px solid rgba(61, 155, 255, 0.6);
            color: var(--primary-strong);
            border-radius: 8px;
            padding: 12px 28px;
            font-size: 15px;
            font-weight: 500;
            transition: all 0.3s ease;
            cursor: pointer;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            letter-spacing: 0.3px;
            line-height: 1;
        }
        .btn-secondary:hover {
            background: rgba(24, 119, 255, 0.12);
            border-color: var(--primary-strong);
            color: var(--primary-strong);
            transform: translateY(-2px);
        }
        .btn-secondary:active {
            transform: translateY(0);
        }

        /* ========== 文章 Hero ========== */
        .article-hero {
            position: relative;
            padding: 64px 0 54px;
            background: var(--bg-deep);
            background-image: var(--gradient-hero);
            overflow: hidden;
            border-bottom: 1px solid rgba(92, 160, 255, 0.1);
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background-size: cover;
            background-position: center 30%;
            opacity: 0.22;
            z-index: 0;
        }
        .hero-bg::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(7, 13, 26, 0.55) 0%, rgba(7, 13, 26, 0.82) 100%);
        }
        .hero-cover {
            position: absolute;
            top: 50%;
            right: 8%;
            width: 300px;
            height: 190px;
            background-size: cover;
            background-position: center;
            border-radius: 18px;
            border: 1px solid rgba(92, 160, 255, 0.3);
            box-shadow: var(--glow-blue);
            transform: translateY(-50%);
            opacity: 0.85;
            z-index: 1;
        }
        .hero-cover::after {
            content: '';
            position: absolute;
            inset: 0;
            border-radius: 18px;
            background: linear-gradient(135deg, rgba(24, 119, 255, 0.15), rgba(255, 107, 44, 0.08));
            pointer-events: none;
        }
        .speed-lines {
            position: absolute;
            top: 24px;
            right: 0;
            width: 480px;
            height: 200px;
            background: repeating-linear-gradient(115deg, transparent 0px, transparent 26px, rgba(255, 255, 255, 0.035) 26px, rgba(255, 255, 255, 0.035) 28px);
            transform: skewX(-16deg);
            pointer-events: none;
            z-index: 0;
        }
        .hero-container {
            position: relative;
            z-index: 2;
        }
        .breadcrumb {
            font-size: 12px;
            color: var(--text-low);
            margin-bottom: 28px;
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--text-low);
            transition: color 0.25s ease;
        }
        .breadcrumb a:hover {
            color: var(--text-hi);
        }
        .breadcrumb .sep {
            color: rgba(107, 127, 163, 0.5);
        }
        .breadcrumb .current {
            color: var(--text-hi);
            font-weight: 500;
        }
        .article-hero h1 {
            font-size: 32px;
            font-weight: 700;
            color: var(--text-hi);
            max-width: 820px;
            line-height: 1.35;
            margin-bottom: 22px;
            letter-spacing: 0.5px;
        }
        .article-meta {
            display: flex;
            align-items: center;
            gap: 22px;
            flex-wrap: wrap;
            font-size: 13px;
            color: var(--text-low);
        }
        .article-meta i {
            margin-right: 5px;
            color: rgba(61, 155, 255, 0.7);
            font-size: 12px;
        }
        .meta-author,
        .meta-date {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-family: 'Rajdhani', 'Inter', sans-serif;
        }
        .badge {
            font-size: 12px;
            color: #9CC9FF;
            background: rgba(24, 119, 255, 0.16);
            border: 1px solid rgba(24, 119, 255, 0.3);
            border-radius: 999px;
            padding: 3px 12px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .badge .dot {
            width: 5px;
            height: 5px;
            background: var(--accent);
            border-radius: 50%;
            display: inline-block;
        }

        /* ========== 正文区域 ========== */
        .article-body {
            padding: var(--space-section) 0 20px;
        }
        .article-content {
            max-width: 760px;
            margin: 0 auto;
        }
        .article-content p {
            margin: 0 0 30px;
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-mid);
        }
        .article-content h2 {
            font-size: 22px;
            font-weight: 700;
            color: var(--text-hi);
            margin: 48px 0 20px;
            padding-left: 14px;
            border-left: 3px solid var(--accent);
            line-height: 1.4;
        }
        .article-content h3 {
            font-size: 19px;
            font-weight: 600;
            color: var(--text-hi);
            margin: 36px 0 16px;
            line-height: 1.45;
        }
        .article-content h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-hi);
            margin: 28px 0 14px;
        }
        .article-content blockquote {
            border-left: 3px solid var(--info);
            background: rgba(0, 229, 207, 0.06);
            padding: 18px 22px;
            margin: 28px 0;
            border-radius: 0 10px 10px 0;
            color: var(--text-mid);
            font-size: 15px;
            line-height: 1.7;
        }
        .article-content ul {
            margin: 0 0 30px;
            padding-left: 0;
        }
        .article-content ul li {
            position: relative;
            padding-left: 24px;
            margin-bottom: 10px;
            padding-bottom: 1px;
        }
        .article-content ul li::before {
            content: '';
            position: absolute;
            left: 0;
            top: 11px;
            width: 6px;
            height: 6px;
            background: var(--accent);
            border-radius: 1px;
        }
        .article-content ol {
            margin: 0 0 30px;
            padding-left: 24px;
            counter-reset: custom-counter;
        }
        .article-content ol li {
            position: relative;
            margin-bottom: 10px;
            counter-increment: custom-counter;
        }
        .article-content ol li::before {
            content: counter(custom-counter) ".";
            position: absolute;
            left: -22px;
            color: var(--accent);
            font-weight: 600;
            font-family: 'Rajdhani', 'Inter', sans-serif;
        }
        .article-content a {
            color: var(--primary-strong);
            text-decoration: underline;
            text-underline-offset: 3px;
        }
        .article-content a:hover {
            color: var(--accent);
        }
        .article-content img {
            border-radius: 12px;
            margin: 26px 0;
            box-shadow: 0 12px 40px rgba(2, 8, 20, 0.5);
        }
        .article-content img + em,
        .article-content img + figcaption {
            font-size: 12px;
            color: var(--text-low);
            text-align: center;
            display: block;
            margin-top: -16px;
            margin-bottom: 26px;
        }
        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 26px 0;
            font-size: 14px;
            border-radius: 10px;
            overflow: hidden;
        }
        .article-content table th,
        .article-content table td {
            padding: 12px 14px;
            border: 1px solid rgba(92, 160, 255, 0.15);
            color: var(--text-mid);
            text-align: left;
        }
        .article-content table th {
            background: rgba(24, 119, 255, 0.1);
            color: var(--text-hi);
            font-weight: 600;
        }
        .article-empty {
            text-align: center;
            padding: 80px 24px;
            background: var(--surface-glass);
            border: 1px solid var(--stroke-glass);
            border-radius: var(--radius);
            backdrop-filter: blur(14px);
        }
        .article-empty .empty-icon {
            width: 56px;
            height: 56px;
            margin: 0 auto 18px;
            border-radius: 50%;
            background: rgba(24, 119, 255, 0.12);
            border: 1px solid rgba(92, 160, 255, 0.3);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            color: var(--primary-strong);
        }
        .article-empty p {
            font-size: 16px;
            color: var(--text-mid);
            margin-bottom: 28px;
        }

        /* ========== 延伸阅读 ========== */
        .related-section {
            padding: 56px 0 20px;
        }
        .section-title {
            font-size: 30px;
            font-weight: 700;
            color: var(--text-hi);
            margin-bottom: 24px;
            position: relative;
            padding-left: 18px;
            line-height: 1.3;
        }
        .section-title::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 4px;
            height: 26px;
            background: linear-gradient(180deg, var(--accent), var(--primary));
            border-radius: 4px;
        }
        .related-card {
            background: var(--surface-glass);
            border: 1px solid var(--stroke-glass);
            border-radius: var(--radius);
            padding: 24px 22px;
            backdrop-filter: blur(14px);
            transition: all 0.3s ease;
            height: 100%;
            display: flex;
            flex-direction: column;
            position: relative;
        }
        .related-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--glow-blue);
            border-color: rgba(92, 160, 255, 0.5);
        }
        .related-card .badge {
            align-self: flex-start;
            margin-bottom: 14px;
        }
        .related-card h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-hi);
            line-height: 1.5;
            margin-bottom: 12px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .related-date {
            font-size: 13px;
            color: var(--text-low);
            font-family: 'Rajdhani', 'Inter', sans-serif;
            margin-top: auto;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .related-card .related-date i {
            color: var(--accent);
            font-size: 12px;
        }
        .related-card a.card-link {
            position: absolute;
            inset: 0;
            z-index: 1;
            text-indent: -9999px;
            overflow: hidden;
        }

        /* ========== 返回按钮区 ========== */
        .back-section {
            padding: 56px 0 20px;
        }
        .back-section .btn-secondary {
            padding: 14px 34px;
            font-size: 15px;
        }
        .back-section .btn-secondary i {
            transition: transform 0.3s ease;
        }
        .back-section .btn-secondary:hover i {
            transform: translateX(-4px);
        }

        /* ========== CTA 转化区 ========== */
        .cta-section {
            padding: 60px 0 var(--space-section);
        }
        .cta-card {
            background: linear-gradient(135deg, rgba(18, 30, 55, 0.85), rgba(7, 13, 26, 0.9));
            border: 1px solid rgba(92, 160, 255, 0.25);
            border-radius: 24px;
            padding: 48px 48px 44px;
            text-align: center;
            backdrop-filter: blur(16px);
            position: relative;
            overflow: hidden;
            box-shadow: 0 24px 80px rgba(2, 8, 20, 0.5);
        }
        .cta-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--accent), var(--primary), var(--info));
        }
        .cta-card::after {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 240px;
            height: 240px;
            background: radial-gradient(circle, rgba(255, 107, 44, 0.12), transparent 70%);
            pointer-events: none;
        }
        .cta-card h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--text-hi);
            margin-bottom: 14px;
            position: relative;
            z-index: 1;
        }
        .cta-card p {
            font-size: 15px;
            color: var(--text-mid);
            max-width: 560px;
            margin: 0 auto 30px;
            line-height: 1.7;
            position: relative;
            z-index: 1;
        }
        .cta-actions {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 18px;
            flex-wrap: wrap;
            position: relative;
            z-index: 1;
        }
        .status-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(0, 229, 207, 0.1);
            border: 1px solid rgba(0, 229, 207, 0.3);
            border-radius: 999px;
            padding: 8px 18px;
            font-size: 13px;
            color: var(--info);
        }
        .status-badge i {
            font-size: 8px;
            animation: pulse-dot 2s ease-in-out infinite;
        }
        @keyframes pulse-dot {
            0%, 100% {
                opacity: 1;
                transform: scale(1);
            }
            50% {
                opacity: 0.3;
                transform: scale(0.7);
            }
        }

        /* ========== 页脚 ========== */
        .site-footer {
            background: var(--bg-deep);
            border-top: 1px solid rgba(92, 160, 255, 0.15);
            padding: 48px 0 32px;
            position: relative;
        }
        .site-footer::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: repeating-linear-gradient(135deg, transparent 0px, transparent 14px, rgba(255, 255, 255, 0.012) 14px, rgba(255, 255, 255, 0.012) 15px);
            pointer-events: none;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 34px;
            position: relative;
            z-index: 1;
        }
        .footer-logo {
            display: flex;
            align-items: center;
            gap: 9px;
            font-size: 20px;
            font-weight: 700;
            color: var(--text-hi);
            margin-bottom: 16px;
        }
        .footer-brand p {
            font-size: 14px;
            color: var(--text-low);
            line-height: 1.7;
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-hi);
            margin-bottom: 18px;
            position: relative;
            padding-bottom: 10px;
        }
        .footer-col h4::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 26px;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
        }
        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-col ul a {
            font-size: 14px;
            color: var(--text-low);
            transition: color 0.25s ease, padding-left 0.25s ease;
        }
        .footer-col ul a:hover {
            color: var(--text-hi);
            padding-left: 4px;
        }
        .social-row {
            display: flex;
            gap: 10px;
        }
        .social-btn {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            border: 1px solid rgba(92, 160, 255, 0.25);
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(24, 119, 255, 0.05);
            color: var(--text-mid);
            transition: all 0.3s ease;
            font-size: 16px;
        }
        .social-btn:hover {
            background: rgba(255, 107, 44, 0.12);
            border-color: rgba(255, 107, 44, 0.4);
            color: var(--accent);
            transform: translateY(-2px);
        }
        .footer-bottom {
            border-top: 1px solid rgba(92, 160, 255, 0.12);
            padding-top: 22px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 14px;
            position: relative;
            z-index: 1;
        }
        .footer-bottom p {
            font-size: 13px;
            color: var(--text-low);
        }
        .legal {
            display: flex;
            gap: 18px;
        }
        .legal a {
            font-size: 12px;
            color: var(--text-low);
        }
        .legal a:hover {
            color: var(--text-hi);
        }

        /* ========== 焦点可见性 ========== */
        a:focus-visible,
        button:focus-visible {
            outline: 2px solid var(--info);
            outline-offset: 3px;
            border-radius: 4px;
        }

        /* ========== 响应式断点 ========== */
        @media (max-width: 1023px) {
            .main-nav {
                display: none;
                position: absolute;
                top: 66px;
                left: 0;
                right: 0;
                background: rgba(7, 13, 26, 0.97);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                padding: 20px 24px 26px;
                border-bottom: 1px solid rgba(92, 160, 255, 0.15);
                box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4);
            }
            .main-nav.open {
                display: block;
            }
            .main-nav ul {
                flex-direction: column;
                gap: 8px;
            }
            .main-nav ul li a {
                display: block;
                padding: 12px 8px;
                font-size: 16px;
                border-radius: 8px;
            }
            .main-nav ul li a:hover {
                background: rgba(24, 119, 255, 0.08);
            }
            .main-nav a.active::after {
                display: none;
            }
            .main-nav a.active {
                color: var(--accent);
            }
            .nav-toggle {
                display: flex;
            }
            .countdown-badge {
                display: none;
            }
            .hero-cover {
                right: 3%;
                width: 220px;
                height: 140px;
                opacity: 0.4;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }
        @media (max-width: 640px) {
            :root {
                --space-section: 60px;
            }
            .article-hero {
                padding: 40px 0 36px;
            }
            .article-hero h1 {
                font-size: 26px;
                line-height: 1.4;
            }
            .article-meta {
                gap: 12px;
            }
            .hero-cover {
                display: none;
            }
            .section-title {
                font-size: 24px;
            }
            .related-card {
                margin-bottom: 18px;
            }
            .cta-card {
                padding: 30px 20px;
                border-radius: 18px;
            }
            .cta-card h2 {
                font-size: 22px;
            }
            .cta-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .cta-actions .btn-primary,
            .cta-actions .btn-secondary {
                width: 100%;
            }
            .status-badge {
                justify-content: center;
            }
            .back-section .btn-secondary {
                width: 100%;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .site-header .nav-right {
                gap: 10px;
            }
            .site-header .btn-sm {
                padding: 8px 16px;
                font-size: 13px;
            }
        }

/* roulang page: category3 */
:root {
            --bg-base: #070D1A;
            --bg-deep: #040810;
            --surface-glass: rgba(18, 30, 55, 0.66);
            --surface-solid: #0F1B33;
            --stroke-glass: rgba(92, 160, 255, 0.28);
            --primary: #1877FF;
            --primary-strong: #3D9BFF;
            --accent: #FF6B2C;
            --accent-soft: rgba(255, 107, 44, 0.16);
            --info: #00E5CF;
            --text-hi: #F2F7FF;
            --text-mid: #B9C7E2;
            --text-low: #6B7FA3;
            --radius: 16px;
            --space-section: 92px;
            --glow-blue: 0 0 0 1px rgba(61, 155, 255, 0.25), 0 8px 40px rgba(24, 119, 255, 0.22);
            --glow-accent: 0 0 0 1px rgba(255, 107, 44, 0.35), 0 6px 42px rgba(255, 107, 44, 0.3);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans CJK SC', sans-serif;
            background: var(--bg-base);
            color: var(--text-mid);
            line-height: 1.65;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            background-image: radial-gradient(1px 1px at 20% 30%, rgba(255, 255, 255, 0.08), transparent),
                radial-gradient(1px 1px at 70% 60%, rgba(0, 229, 207, 0.06), transparent);
        }

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

        a {
            color: var(--primary-strong);
            text-decoration: none;
            transition: color .2s ease;
        }

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

        h1,
        h2,
        h3,
        h4 {
            font-family: 'Rajdhani', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans CJK SC', sans-serif;
            color: var(--text-hi);
            line-height: 1.25;
        }

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

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

        .row .row {
            margin: 0 -12px;
            padding: 0;
        }

        .columns {
            padding: 0 12px;
        }

        a:focus-visible,
        button:focus-visible {
            outline: 2px solid var(--info);
            outline-offset: 2px;
        }

        /* ======= 按钮体系 ======= */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, #FF4F1C, #FF8E3C);
            color: #fff;
            border: none;
            border-radius: 8px;
            padding: 14px 30px;
            font-size: 15px;
            font-weight: 600;
            font-family: inherit;
            box-shadow: 0 4px 28px rgba(255, 107, 44, 0.38);
            cursor: pointer;
            transition: all .25s ease;
        }

        .btn-primary:hover {
            background: linear-gradient(135deg, #FF6A2C, #FFA25C);
            transform: translateY(-2px);
            box-shadow: 0 8px 40px rgba(255, 107, 44, 0.45);
            color: #fff;
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 4px 24px rgba(255, 107, 44, 0.35);
        }

        .btn-sm {
            padding: 10px 22px;
            font-size: 14px;
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: transparent;
            color: var(--primary-strong);
            border: 1px solid rgba(24, 119, 255, 0.5);
            border-radius: 8px;
            padding: 13px 28px;
            font-size: 15px;
            font-weight: 500;
            font-family: inherit;
            cursor: pointer;
            transition: all .25s ease;
        }

        .btn-outline:hover {
            background: rgba(24, 119, 255, 0.12);
            color: var(--text-hi);
        }

        /* ======= 导航条 ======= */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            height: 66px;
            background: rgba(7, 13, 26, 0.82);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(92, 160, 255, 0.15);
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 66px;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-family: 'Rajdhani', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            font-size: 20px;
            font-weight: 700;
            color: var(--text-hi);
            letter-spacing: 0.5px;
        }

        .nav-logo:hover {
            color: var(--text-hi);
        }

        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 28px;
            height: 28px;
            border-radius: 8px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            box-shadow: 0 0 18px rgba(24, 119, 255, 0.45);
        }

        .main-nav ul {
            list-style: none;
            display: flex;
            gap: 28px;
            margin: 0;
        }

        .main-nav a {
            color: var(--text-mid);
            font-size: 14px;
            font-weight: 500;
            padding: 6px 2px;
            position: relative;
            display: inline-block;
        }

        .main-nav a:hover {
            color: var(--text-hi);
        }

        .main-nav a.active {
            color: var(--text-hi);
        }

        .main-nav a.active::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -2px;
            width: 100%;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
        }

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

        .countdown-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(255, 107, 44, 0.14);
            border: 1px solid rgba(255, 107, 44, 0.32);
            border-radius: 999px;
            padding: 4px 12px;
            font-size: 12px;
            color: #FFB087;
            white-space: nowrap;
        }

        .countdown-badge i {
            font-size: 11px;
        }

        .cd-num {
            font-family: 'Rajdhani', sans-serif;
            font-weight: 600;
            letter-spacing: 0.5px;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: transparent;
            border: none;
            padding: 8px;
            cursor: pointer;
        }

        .nav-toggle span {
            width: 22px;
            height: 2px;
            background: var(--text-hi);
            border-radius: 2px;
            transition: all .25s ease;
        }

        /* ======= 分类 Hero ======= */
        .cat-hero {
            position: relative;
            padding: 64px 0 56px;
            background: radial-gradient(900px 320px at 50% -30%, rgba(24, 119, 255, 0.22), transparent 60%),
                linear-gradient(180deg, #0A1324 0%, #070D1A 100%);
            border-bottom: 1px solid rgba(92, 160, 255, 0.12);
            text-align: center;
            overflow: hidden;
        }

        .cat-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.webp') center / cover no-repeat;
            opacity: 0.12;
            pointer-events: none;
        }

        .cat-hero-inner {
            position: relative;
            z-index: 2;
        }

        .breadcrumb {
            font-size: 13px;
            color: var(--text-low);
            margin-bottom: 14px;
        }

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

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

        .breadcrumb span {
            color: var(--text-hi);
        }

        .cat-title {
            font-size: 38px;
            font-weight: 700;
            color: var(--text-hi);
            margin-bottom: 10px;
        }

        .cat-subtitle {
            font-size: 14px;
            color: var(--text-low);
            max-width: 640px;
            margin: 10px auto 0;
            line-height: 1.7;
        }

        /* ======= 分类内容区 ======= */
        .cat-main {
            padding: 60px 0 72px;
        }

        .content-list {
            padding-right: 8px;
        }

        .content-card {
            display: flex;
            gap: 24px;
            padding: 28px 0;
            border-bottom: 1px solid rgba(92, 160, 255, 0.1);
            align-items: flex-start;
            transition: background .25s ease;
            border-radius: 8px;
        }

        .content-card:first-child {
            padding-top: 0;
        }

        .content-card:last-child {
            border-bottom: none;
        }

        .content-card:hover {
            background: rgba(24, 119, 255, 0.05);
        }

        .content-card-img {
            flex: 0 0 120px;
            width: 120px;
            border-radius: 12px;
            overflow: hidden;
        }

        .content-card-img img {
            width: 120px;
            height: 90px;
            object-fit: cover;
            border-radius: 12px;
            transition: transform .4s ease;
        }

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

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

        .content-tag {
            display: inline-block;
            font-size: 12px;
            color: #9CC9FF;
            background: rgba(24, 119, 255, 0.16);
            border: 1px solid rgba(24, 119, 255, 0.3);
            border-radius: 999px;
            padding: 2px 10px;
            margin-bottom: 8px;
        }

        .content-tag::before {
            content: '';
            display: inline-block;
            width: 4px;
            height: 4px;
            border-radius: 50%;
            background: var(--accent);
            margin-right: 5px;
            vertical-align: middle;
        }

        .content-title {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-hi);
            margin-bottom: 8px;
            line-height: 1.35;
        }

        .content-text {
            font-size: 14px;
            color: var(--text-mid);
            line-height: 1.65;
            margin-bottom: 10px;
        }

        .content-link {
            font-size: 14px;
            font-weight: 500;
            color: var(--primary-strong);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: gap .25s ease;
        }

        .content-link:hover {
            color: var(--accent);
            gap: 8px;
        }

        /* ======= 侧边栏 ======= */
        .sidebar {
            padding-left: 24px;
        }

        .side-card {
            background: var(--surface-glass);
            border: 1px solid var(--stroke-glass);
            border-radius: var(--radius);
            padding: 24px;
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            box-shadow: 0 16px 48px rgba(2, 8, 20, 0.5);
            margin-bottom: 24px;
        }

        .side-card h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 16px;
            padding-left: 14px;
            position: relative;
        }

        .side-card h3::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 4px;
            height: 16px;
            background: var(--accent);
            border-radius: 2px;
        }

        .summary-text {
            font-size: 14px;
            color: var(--text-mid);
            margin-bottom: 16px;
            line-height: 1.65;
        }

        .stats-row {
            display: flex;
            gap: 8px;
            margin: 0;
        }

        .stats-item {
            flex: 1;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(92, 160, 255, 0.15);
            border-radius: 8px;
            padding: 12px 6px;
            text-align: center;
        }

        .stats-num {
            font-family: 'Rajdhani', sans-serif;
            font-size: 22px;
            font-weight: 600;
            color: var(--info);
            display: block;
            line-height: 1.1;
        }

        .stats-label {
            font-size: 11px;
            color: var(--text-low);
            display: block;
            margin-top: 4px;
        }

        .nav-card-list {
            list-style: none;
            margin: 0;
        }

        .nav-card-list li+li {
            border-top: 1px solid rgba(92, 160, 255, 0.1);
        }

        .nav-card-list a {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 12px 4px;
            color: var(--text-mid);
            font-size: 14px;
        }

        .nav-card-list a i {
            font-size: 12px;
            color: var(--text-low);
            transition: transform .2s ease;
        }

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

        .nav-card-list a:hover i {
            transform: translateX(3px);
            color: var(--accent);
        }

        .nav-card-list a.active {
            color: var(--accent);
            font-weight: 600;
        }

        .nav-card-list a.active i {
            color: var(--accent);
        }

        /* ======= 分类底部 CTA ======= */
        .cat-cta {
            padding-bottom: 80px;
        }

        .cta-card {
            background: linear-gradient(135deg, rgba(24, 119, 255, 0.13), rgba(255, 107, 44, 0.08)),
                var(--surface-glass);
            border: 1px solid var(--stroke-glass);
            border-radius: 20px;
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            padding: 48px 40px;
            text-align: center;
            box-shadow: var(--glow-blue);
        }

        .cta-card h2 {
            font-size: 26px;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .cta-card p {
            font-size: 14px;
            color: var(--text-mid);
            margin-bottom: 28px;
            max-width: 520px;
            margin-left: auto;
            margin-right: auto;
        }

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

        .status-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(0, 229, 207, 0.12);
            border: 1px solid rgba(0, 229, 207, 0.35);
            color: var(--info);
            font-size: 13px;
            padding: 7px 14px;
            border-radius: 999px;
        }

        .status-badge i {
            font-size: 9px;
        }

        /* ======= 页脚 ======= */
        .site-footer {
            background: var(--bg-deep);
            border-top: 1px solid rgba(92, 160, 255, 0.15);
            padding: 48px 0 32px;
            position: relative;
        }

        .site-footer::before {
            content: '';
            position: absolute;
            inset: 0;
            background: repeating-linear-gradient(45deg, rgba(255, 255, 255, 0.02) 0 2px, transparent 2px 8px);
            pointer-events: none;
        }

        .site-footer .container {
            position: relative;
            z-index: 1;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 0.8fr 0.8fr 0.8fr;
            gap: 24px;
            margin-bottom: 32px;
        }

        .footer-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-family: 'Rajdhani', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            font-size: 18px;
            font-weight: 700;
            color: var(--text-hi);
            margin-bottom: 12px;
        }

        .footer-logo .logo-icon {
            width: 24px;
            height: 24px;
            border-radius: 6px;
            font-size: 14px;
        }

        .footer-brand p {
            font-size: 13px;
            color: var(--text-low);
            line-height: 1.7;
            margin: 0;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-hi);
            margin-bottom: 14px;
        }

        .footer-col ul {
            list-style: none;
            margin: 0;
        }

        .footer-col li a {
            font-size: 13px;
            color: var(--text-low);
            padding: 4px 0;
            display: inline-block;
        }

        .footer-col li a:hover {
            color: var(--text-hi);
        }

        .social-row {
            display: flex;
            gap: 10px;
            margin: 0;
        }

        .social-btn {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            border: 1px solid rgba(92, 160, 255, 0.25);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: var(--text-mid);
            background: rgba(255, 255, 255, 0.03);
            transition: all .25s ease;
        }

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

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 24px;
            border-top: 1px solid rgba(92, 160, 255, 0.12);
        }

        .footer-bottom p {
            font-size: 13px;
            color: var(--text-low);
            margin: 0;
        }

        .legal a {
            font-size: 12px;
            color: var(--text-low);
            margin-left: 16px;
        }

        .legal a:hover {
            color: var(--text-hi);
        }

        /* ======= 响应式断点 ======= */
        @media screen and (max-width: 1023px) {
            .site-header .container {
                position: relative;
            }

            .main-nav {
                position: fixed;
                top: 66px;
                left: 0;
                right: 0;
                background: var(--surface-solid);
                display: none;
                padding: 24px;
                border-bottom: 1px solid rgba(92, 160, 255, 0.2);
                box-shadow: 0 20px 40px rgba(2, 8, 20, 0.7);
            }

            .main-nav.open {
                display: block;
            }

            .main-nav ul {
                flex-direction: column;
                gap: 4px;
            }

            .main-nav a {
                display: block;
                padding: 12px 4px;
                border-bottom: 1px solid rgba(92, 160, 255, 0.08);
            }

            .main-nav a.active::after {
                display: none;
            }

            .main-nav a.active {
                color: var(--accent);
            }

            .nav-toggle {
                display: flex;
            }

            .countdown-badge {
                display: none;
            }

            .sidebar {
                padding-left: 12px;
                margin-top: 16px;
            }

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

        @media screen and (max-width: 767px) {
            .cat-hero {
                padding: 48px 0 40px;
            }

            .cat-title {
                font-size: 30px;
            }

            .cat-main {
                padding: 40px 0 56px;
            }

            .content-card {
                flex-direction: column;
                gap: 16px;
            }

            .content-card-img,
            .content-card-img img {
                width: 100%;
                height: auto;
                aspect-ratio: 16 / 9;
            }

            .footer-bottom {
                flex-direction: column;
                gap: 12px;
                text-align: center;
            }

            .legal a {
                margin-left: 0;
                margin-right: 16px;
            }

            .cta-card {
                padding: 36px 24px;
            }

            .cta-card h2 {
                font-size: 22px;
            }

            .stats-row {
                flex-direction: column;
            }
        }

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

            .nav-logo {
                font-size: 18px;
            }

            .btn-sm {
                padding: 8px 16px;
                font-size: 13px;
            }

            .row {
                padding: 0 16px;
            }

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

            .cat-subtitle {
                font-size: 13px;
            }

            .content-tag {
                font-size: 11px;
            }

            .content-title {
                font-size: 17px;
            }

            .content-text {
                font-size: 13px;
            }

            .side-card {
                padding: 18px;
            }

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

            .cta-actions {
                flex-direction: column;
                width: 100%;
            }

            .cta-actions .btn-primary {
                width: 100%;
            }

            .status-badge {
                width: 100%;
                justify-content: center;
            }
        }

        @media screen and (min-width: 1024px) {
            .sidebar {
                padding-left: 32px;
            }
        }