/* roulang page: index */
:root {
            --bg: #0A0E1A;
            --bg-elevated: #101726;
            --card-bg: rgba(255, 255, 255, 0.04);
            --card-border: rgba(255, 255, 255, 0.10);
            --glass-highlight: rgba(255, 255, 255, 0.06);
            --primary: #2E6BFF;
            --accent: #00D4FF;
            --text: #E6ECF5;
            --text-muted: #93A1BA;
            --silver-line: rgba(200, 208, 226, 0.18);
            --radius-card: 18px;
            --radius-small: 12px;
            --radius-pill: 50px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.35);
            --glow: 0 0 24px rgba(0, 212, 255, 0.30);
            --container-w: 1170px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            background: var(--bg);
            color: var(--text);
            font-size: 16px;
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
            background-image:
                radial-gradient(ellipse 500px 400px at left top, rgba(46, 107, 255, 0.06), transparent),
                radial-gradient(ellipse 600px 500px at right bottom, rgba(0, 212, 255, 0.05), transparent);
            background-attachment: fixed;
        }

        body::before {
            content: '';
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-image: linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
            background-size: 60px 60px;
            pointer-events: none;
            z-index: 0;
        }

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

        a:hover {
            color: #4fe0ff;
        }

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

        .container {
            max-width: var(--container-w);
            padding: 0 20px;
            position: relative;
            z-index: 1;
        }

        .section {
            padding: 90px 0;
            position: relative;
            z-index: 1;
        }

        .section-head {
            margin-bottom: 48px;
            max-width: 720px;
        }

        .section-head.center {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }

        .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(0, 212, 255, 0.12);
            border: 1px solid rgba(0, 212, 255, 0.25);
            color: #9EEBFF;
            font-size: 13px;
            font-weight: 600;
            padding: 6px 18px;
            border-radius: var(--radius-pill);
            letter-spacing: 0.04em;
            margin-bottom: 18px;
            text-transform: none;
        }

        .eyebrow i {
            font-size: 12px;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            color: var(--text);
            line-height: 1.3;
            font-weight: 700;
        }

        h1 {
            font-size: 40px;
            letter-spacing: 0.01em;
        }

        h2 {
            font-size: 30px;
            margin-bottom: 16px;
        }

        h3 {
            font-size: 20px;
            font-weight: 600;
        }

        p {
            color: var(--text-muted);
            margin-bottom: 0;
        }

        .accent-text {
            color: var(--accent);
        }

        .text-white {
            color: var(--text) !important;
        }

        .text-muted {
            color: var(--text-muted) !important;
        }

        /* ============= 按钮 ============= */
        .btn-primary-glow {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: linear-gradient(135deg, #2E6BFF, #00D4FF);
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            border: none;
            border-radius: var(--radius-pill);
            padding: 14px 36px;
            box-shadow: 0 0 24px rgba(0, 212, 255, 0.35), 0 4px 20px rgba(46, 107, 255, 0.25);
            text-decoration: none;
            transition: all 0.3s ease;
            cursor: pointer;
        }

        .btn-primary-glow:hover {
            filter: brightness(1.1);
            transform: translateY(-2px);
            box-shadow: 0 0 32px rgba(0, 212, 255, 0.5), 0 6px 28px rgba(46, 107, 255, 0.35);
            color: #fff;
        }

        .btn-primary-glow:active {
            transform: translateY(0);
            box-shadow: 0 0 18px rgba(0, 212, 255, 0.25);
        }

        .btn-outline-glass {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.2);
            color: var(--text);
            font-size: 16px;
            font-weight: 500;
            border-radius: var(--radius-pill);
            padding: 14px 36px;
            text-decoration: none;
            transition: all 0.3s ease;
            backdrop-filter: blur(12px);
            cursor: pointer;
        }

        .btn-outline-glass:hover {
            border-color: rgba(0, 212, 255, 0.5);
            background: rgba(0, 212, 255, 0.08);
            color: var(--accent);
            transform: translateY(-2px);
        }

        .btn-lg {
            padding: 17px 48px;
            font-size: 17px;
        }

        /* ============= 导航 ============= */
        .site-header {
            position: fixed;
            top: 14px;
            left: 0;
            right: 0;
            z-index: 1000;
            padding: 0 20px;
        }

        .floating-nav {
            max-width: 1200px;
            margin: 0 auto;
            background: rgba(10, 14, 26, 0.72);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border: 1px solid var(--silver-line);
            border-radius: 60px;
            padding: 8px 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
            transition: box-shadow 0.3s ease;
        }

        .floating-nav:hover {
            box-shadow: 0 8px 40px rgba(0, 0, 0, 0.45), 0 0 20px rgba(0, 212, 255, 0.08);
        }

        .nav-logo {
            font-size: 20px;
            font-weight: 800;
            color: var(--text);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 4px;
            letter-spacing: 0.02em;
            line-height: 1.2;
            white-space: nowrap;
        }

        .nav-logo .logo-icon {
            width: 32px;
            height: 32px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            border-radius: 10px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            font-weight: 800;
            color: #fff;
            margin-right: 4px;
            box-shadow: 0 0 14px rgba(0, 212, 255, 0.3);
        }

        .nav-logo .logo-accent {
            color: var(--accent);
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-menu .nav-link {
            color: var(--text-muted);
            font-size: 15px;
            font-weight: 500;
            padding: 8px 20px;
            border-radius: 40px;
            text-decoration: none;
            transition: all 0.3s ease;
            display: block;
        }

        .nav-menu .nav-link:hover {
            color: var(--text);
            text-shadow: 0 0 12px rgba(0, 212, 255, 0.5);
        }

        .nav-menu .nav-link.active {
            background: rgba(0, 212, 255, 0.12);
            color: #9EEBFF;
            border: 1px solid rgba(0, 212, 255, 0.25);
            box-shadow: 0 0 12px rgba(0, 212, 255, 0.1);
        }

        .btn-nav {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            border-radius: 40px;
            padding: 8px 22px;
            text-decoration: none;
            transition: all 0.3s ease;
            box-shadow: 0 0 14px rgba(0, 212, 255, 0.2);
            white-space: nowrap;
            border: none;
        }

        .btn-nav:hover {
            filter: brightness(1.1);
            transform: translateY(-1px);
            color: #fff;
            box-shadow: 0 0 20px rgba(0, 212, 255, 0.35);
        }

        .nav-toggle {
            display: none;
            background: transparent;
            border: none;
            color: var(--text);
            font-size: 22px;
            padding: 4px 10px;
            border-radius: 8px;
            cursor: pointer;
        }

        .mobile-menu {
            display: none;
            max-width: 1200px;
            margin: 10px auto 0;
            background: rgba(10, 14, 26, 0.95);
            backdrop-filter: blur(20px);
            border: 1px solid var(--silver-line);
            border-radius: 20px;
            padding: 18px;
            flex-direction: column;
            gap: 4px;
            box-shadow: var(--shadow-card);
        }

        .mobile-menu.show {
            display: flex;
        }

        .mobile-menu a {
            color: var(--text-muted);
            font-size: 15px;
            font-weight: 500;
            padding: 12px 18px;
            border-radius: 12px;
            text-decoration: none;
            transition: all 0.3s ease;
        }

        .mobile-menu a:hover,
        .mobile-menu a.active {
            background: rgba(0, 212, 255, 0.1);
            color: #9EEBFF;
        }

        .mobile-menu .btn-mobile-cta {
            margin-top: 8px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            text-align: center;
            border-radius: 40px;
            padding: 14px;
            border: none;
        }

        /* ============= Hero ============= */
        .hero {
            position: relative;
            padding: 160px 0 100px;
            min-height: 100vh;
            display: flex;
            align-items: center;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            z-index: 1;
        }

        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(10, 14, 26, 0.92) 0%, rgba(10, 14, 26, 0.7) 50%, rgba(10, 14, 26, 0.4) 100%);
            z-index: 0;
        }

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

        .hero-left {
            padding-right: 40px;
        }

        .hero-title {
            font-size: 42px;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 20px;
        }

        .hero-title .highlight {
            color: var(--accent);
            text-shadow: 0 0 30px rgba(0, 212, 255, 0.4);
        }

        .hero-subtitle {
            font-size: 17px;
            color: var(--text-muted);
            line-height: 1.8;
            margin-bottom: 32px;
            max-width: 500px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            margin-bottom: 30px;
        }

        .hero-trust {
            display: flex;
            align-items: center;
            gap: 20px;
            font-size: 13px;
            color: var(--text-muted);
        }

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

        .hero-trust i {
            color: var(--accent);
        }

        .entrance-card {
            background: linear-gradient(160deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.02));
            border: 1px solid var(--card-border);
            border-radius: var(--radius-card);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            padding: 32px;
            box-shadow: var(--shadow-card);
            position: relative;
            overflow: hidden;
        }

        .entrance-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 20px;
            right: 20px;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.25), transparent);
        }

        .entrance-card .card-head {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 24px;
        }

        .entrance-card .card-head h4 {
            font-size: 18px;
            font-weight: 700;
            margin: 0;
            color: var(--text);
        }

        .status-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(0, 212, 255, 0.12);
            border: 1px solid rgba(0, 212, 255, 0.25);
            color: #9EEBFF;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: var(--radius-pill);
        }

        .status-badge .dot {
            width: 6px;
            height: 6px;
            background: var(--accent);
            border-radius: 50%;
            animation: pulse 1.5s infinite;
        }

        @keyframes pulse {
            0%,
            100% {
                opacity: 1;
                transform: scale(1);
            }
            50% {
                opacity: 0.5;
                transform: scale(0.8);
            }
        }

        .entrance-item {
            display: flex;
            align-items: flex-start;
            gap: 14px;
            padding: 14px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }

        .entrance-item:last-child {
            border-bottom: none;
        }

        .entrance-item i {
            width: 34px;
            height: 34px;
            background: rgba(0, 212, 255, 0.1);
            border: 1px solid rgba(0, 212, 255, 0.2);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            color: var(--accent);
            flex-shrink: 0;
        }

        .entrance-item h5 {
            font-size: 14px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 2px;
        }

        .entrance-item p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.5;
        }

        /* ============= 痛点区 ============= */
        .pain-section {
            background: transparent;
        }

        .pain-cards {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
            align-items: start;
        }

        .pain-card {
            background: linear-gradient(160deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.02));
            border: 1px solid var(--card-border);
            border-radius: var(--radius-card);
            backdrop-filter: blur(14px);
            padding: 34px 28px;
            position: relative;
            transition: all 0.35s ease;
            min-height: 280px;
            display: flex;
            flex-direction: column;
        }

        .pain-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 24px;
            right: 24px;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.25), transparent);
        }

        .pain-card:nth-child(2) {
            transform: translateY(20px);
        }

        .pain-card:hover {
            transform: translateY(-6px);
            border-color: rgba(0, 212, 255, 0.3);
            box-shadow: var(--shadow-card), 0 0 24px rgba(0, 212, 255, 0.08);
        }

        .pain-card:nth-child(2):hover {
            transform: translateY(14px);
        }

        .pain-icon {
            width: 48px;
            height: 48px;
            border-radius: 16px;
            background: linear-gradient(135deg, rgba(46, 107, 255, 0.2), rgba(0, 212, 255, 0.15));
            border: 1px solid rgba(0, 212, 255, 0.25);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: var(--accent);
            margin-bottom: 20px;
        }

        .pain-card h3 {
            font-size: 18px;
            margin-bottom: 10px;
        }

        .pain-card p {
            font-size: 14px;
            line-height: 1.7;
            flex-grow: 1;
        }

        .pain-link {
            margin-top: 16px;
            font-size: 13px;
            color: var(--accent);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-weight: 500;
            transition: gap 0.3s ease;
        }

        .pain-link:hover {
            gap: 12px;
            color: #4fe0ff;
        }

        /* ============= 解决方案 ============= */
        .solution-section {
            background: var(--bg-elevated);
            border-top: 1px solid var(--silver-line);
            border-bottom: 1px solid var(--silver-line);
        }

        .solution-grid {
            display: grid;
            grid-template-columns: 55% 45%;
            gap: 60px;
            align-items: center;
        }

        .feature-list {
            margin-top: 30px;
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .feature-item {
            display: flex;
            gap: 16px;
            align-items: flex-start;
        }

        .feature-icon {
            width: 38px;
            height: 38px;
            background: rgba(0, 212, 255, 0.1);
            border: 1px solid rgba(0, 212, 255, 0.2);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            color: var(--accent);
            flex-shrink: 0;
        }

        .feature-text h4 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 2px;
        }

        .feature-text p {
            font-size: 14px;
            color: var(--text-muted);
        }

        .solution-visual {
            position: relative;
        }

        .image-frame {
            background: linear-gradient(160deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.02));
            border: 1px solid var(--card-border);
            border-radius: var(--radius-card);
            padding: 12px;
            backdrop-filter: blur(14px);
            box-shadow: var(--shadow-card), 0 0 40px rgba(0, 212, 255, 0.06);
            position: relative;
        }

        .image-frame img {
            border-radius: 14px;
            width: 100%;
            height: auto;
            display: block;
        }

        .image-badge {
            position: absolute;
            top: -14px;
            right: 24px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            font-size: 12px;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: var(--radius-pill);
            box-shadow: 0 4px 16px rgba(46, 107, 255, 0.3);
        }

        /* ============= 数据区 ============= */
        .stats-section {
            background: #101726;
            position: relative;
            padding: 70px 0;
            border-top: 1px solid var(--silver-line);
            border-bottom: 1px solid var(--silver-line);
            overflow: hidden;
        }

        .stats-section::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 800px;
            height: 400px;
            background: radial-gradient(ellipse, rgba(0, 212, 255, 0.06), transparent);
            pointer-events: none;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 40px;
            position: relative;
            z-index: 1;
        }

        .stat-item {
            text-align: center;
            padding: 20px 10px;
        }

        .stat-number {
            font-size: 62px;
            font-weight: 800;
            line-height: 1.1;
            background: linear-gradient(135deg, #5eb8ff, var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            display: inline-block;
            text-shadow: 0 0 40px rgba(0, 212, 255, 0.1);
        }

        .stat-label {
            font-size: 14px;
            color: var(--text-muted);
            margin-top: 8px;
            letter-spacing: 0.03em;
        }

        /* ============= 证言区 ============= */
        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .testimonial-card {
            background: linear-gradient(160deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.02));
            border: 1px solid var(--card-border);
            border-radius: var(--radius-card);
            padding: 32px 28px;
            backdrop-filter: blur(14px);
            position: relative;
            transition: all 0.3s ease;
            display: flex;
            flex-direction: column;
        }

        .testimonial-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 24px;
            right: 24px;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.25), transparent);
        }

        .testimonial-card:first-child {
            grid-column: span 2;
        }

        .testimonial-card:hover {
            border-color: rgba(0, 212, 255, 0.3);
            box-shadow: var(--shadow-card);
            transform: translateY(-4px);
        }

        .stars {
            color: #F5A623;
            font-size: 14px;
            margin-bottom: 16px;
            letter-spacing: 2px;
        }

        .quote {
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.8;
            flex-grow: 1;
            margin-bottom: 20px;
        }

        .quote::before {
            content: '\201C';
            font-size: 30px;
            color: var(--accent);
            opacity: 0.5;
            margin-right: 4px;
        }

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

        .avatar {
            width: 42px;
            height: 42px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 15px;
            font-weight: 700;
            flex-shrink: 0;
        }

        .author-name {
            font-size: 14px;
            font-weight: 600;
            color: var(--text);
        }

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

        /* ============= CTA ============= */
        .cta-section {
            padding: 70px 0;
        }

        .cta-container {
            background: linear-gradient(135deg, rgba(46, 107, 255, 0.9), rgba(0, 212, 255, 0.75));
            border-radius: 24px;
            padding: 60px 50px;
            text-align: center;
            position: relative;
            overflow: hidden;
            box-shadow: 0 20px 60px rgba(46, 107, 255, 0.3);
            background-image: url('/assets/images/backpic/back-3.webp');
            background-size: cover;
            background-position: center;
        }

        .cta-container::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(46, 107, 255, 0.88), rgba(0, 212, 255, 0.75));
            z-index: 0;
        }

        .cta-container>* {
            position: relative;
            z-index: 1;
        }

        .cta-title {
            font-size: 32px;
            color: #fff;
            font-weight: 800;
            margin-bottom: 12px;
        }

        .cta-subtitle {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.9);
            margin-bottom: 28px;
            max-width: 520px;
            margin-left: auto;
            margin-right: auto;
        }

        .cta-container .btn-primary-glow {
            background: #fff;
            color: var(--primary);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
        }

        .cta-container .btn-primary-glow:hover {
            color: var(--primary);
            background: #f8faff;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
        }

        .cta-safe-note {
            margin-top: 14px;
            font-size: 12px;
            color: rgba(255, 255, 255, 0.75);
        }

        /* ============= 最新资讯 ============= */
        .news-section {
            padding: 90px 0 100px;
        }

        .news-card {
            background: linear-gradient(160deg, rgba(255, 255, 255, 0.07), rgba(255, 255, 255, 0.02));
            border: 1px solid var(--card-border);
            border-radius: var(--radius-card);
            overflow: hidden;
            backdrop-filter: blur(14px);
            transition: all 0.35s ease;
            height: 100%;
            display: flex;
            flex-direction: column;
        }

        .news-card:hover {
            transform: translateY(-6px);
            border-color: rgba(0, 212, 255, 0.3);
            box-shadow: var(--shadow-card), 0 0 24px rgba(0, 212, 255, 0.06);
        }

        .news-thumb {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 9;
            background: var(--bg-elevated);
        }

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

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

        .badge-cat {
            position: absolute;
            top: 12px;
            left: 12px;
            background: rgba(10, 14, 26, 0.7);
            border: 1px solid rgba(0, 212, 255, 0.3);
            color: #9EEBFF;
            font-size: 12px;
            padding: 4px 14px;
            border-radius: var(--radius-pill);
            backdrop-filter: blur(8px);
            font-weight: 500;
        }

        .news-body {
            padding: 22px 24px 24px;
            display: flex;
            flex-direction: column;
            flex-grow: 1;
        }

        .news-title {
            font-size: 17px;
            font-weight: 600;
            line-height: 1.5;
            margin-bottom: 10px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

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

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

        .news-excerpt {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 18px;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
            flex-grow: 1;
        }

        .news-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 13px;
            color: var(--text-muted);
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding-top: 14px;
        }

        .news-meta a {
            color: var(--accent);
            font-weight: 500;
            font-size: 13px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            text-decoration: none;
        }

        .news-meta a:hover {
            color: #4fe0ff;
        }

        .empty-state {
            padding: 70px 20px;
            text-align: center;
            background: rgba(255, 255, 255, 0.02);
            border: 1px dashed var(--silver-line);
            border-radius: var(--radius-card);
        }

        .empty-state i {
            color: var(--text-muted);
            font-size: 36px;
            margin-bottom: 14px;
            display: block;
        }

        .empty-state p {
            color: var(--text-muted);
            font-size: 15px;
        }

        /* ============= 页脚 ============= */
        .site-footer {
            background: #060910;
            border-top: 1px solid var(--silver-line);
            padding: 70px 0 30px;
            position: relative;
            z-index: 1;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
            gap: 50px;
            margin-bottom: 50px;
        }

        .footer-brand-logo {
            font-size: 20px;
            font-weight: 800;
            color: var(--text);
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 16px;
        }

        .footer-brand-logo .logo-icon {
            width: 30px;
            height: 30px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            border-radius: 9px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 12px;
            font-weight: 800;
            color: #fff;
        }

        .footer-desc {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            max-width: 280px;
        }

        .footer-col h5 {
            font-size: 14px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 18px;
            letter-spacing: 0.02em;
        }

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

        .footer-links a {
            color: var(--text-muted);
            font-size: 14px;
            text-decoration: none;
            transition: all 0.3s;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

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

        .footer-links a i {
            font-size: 11px;
            color: var(--accent);
            opacity: 0.7;
        }

        .footer-security {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.7;
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 24px;
            text-align: center;
            font-size: 13px;
            color: rgba(147, 161, 186, 0.7);
        }

        .footer-bottom a {
            color: rgba(147, 161, 186, 0.8);
            text-decoration: none;
        }

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

        /* ============= 响应式 ============= */
        @media (max-width: 992px) {
            .hero {
                padding-top: 140px;
            }

            .hero-title {
                font-size: 34px;
            }

            .solution-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 40px;
            }

            .nav-menu {
                display: none;
            }

            .btn-nav {
                display: none;
            }

            .nav-toggle {
                display: block;
            }

            .mobile-menu.show {
                display: flex;
            }
        }

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

            h1 {
                font-size: 32px;
            }

            h2 {
                font-size: 24px;
            }

            .pain-cards {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .pain-card:nth-child(2) {
                transform: none;
            }

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

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

            .stat-number {
                font-size: 44px;
            }

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

            .testimonial-card:first-child {
                grid-column: span 1;
            }

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

            .hero-actions .btn-primary-glow,
            .hero-actions .btn-outline-glass {
                justify-content: center;
            }

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

            .cta-title {
                font-size: 24px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }

            .news-section {
                padding: 56px 0 70px;
            }

            .hero-left {
                padding-right: 0;
            }

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

            .hero {
                min-height: auto;
                padding-bottom: 60px;
            }
        }

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

            .container {
                padding: 0 16px;
            }

            .floating-nav {
                padding: 6px 14px;
                border-radius: 40px;
            }

            .nav-logo {
                font-size: 17px;
            }

            .nav-logo .logo-icon {
                width: 26px;
                height: 26px;
                font-size: 11px;
            }

            .hero-actions .btn-primary-glow,
            .hero-actions .btn-outline-glass {
                width: 100%;
            }

            .stat-number {
                font-size: 36px;
            }

            .cta-title {
                font-size: 22px;
            }
        }

        /* ============= 辅助 ============= */
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 44px;
            height: 44px;
            background: rgba(10, 14, 26, 0.8);
            border: 1px solid var(--silver-line);
            border-radius: 50%;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            cursor: pointer;
            z-index: 999;
            transition: all 0.3s;
            backdrop-filter: blur(10px);
            text-decoration: none;
        }

        .back-to-top:hover {
            border-color: var(--accent);
            color: var(--accent);
            box-shadow: var(--glow);
            transform: translateY(-3px);
        }

        ::selection {
            background: rgba(0, 212, 255, 0.3);
            color: #fff;
        }

        ::-webkit-scrollbar {
            width: 8px;
        }

        ::-webkit-scrollbar-track {
            background: var(--bg);
        }

        ::-webkit-scrollbar-thumb {
            background: rgba(255, 255, 255, 0.12);
            border-radius: 4px;
        }

        ::-webkit-scrollbar-thumb:hover {
            background: rgba(0, 212, 255, 0.3);
        }

        .glass-card {
            background: linear-gradient(160deg, rgba(255, 255, 255, 0.07), rgba(255, 255, 255, 0.02));
            border: 1px solid var(--card-border);
            border-radius: var(--radius-card);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
        }

        .img-fluid {
            width: 100%;
            height: auto;
        }

/* roulang page: category1 */
/* ============ 设计变量 ============ */
        :root {
            --bg: #0A0E1A;
            --bg-elevated: #101726;
            --card-bg: rgba(255, 255, 255, 0.04);
            --card-border: rgba(255, 255, 255, 0.10);
            --glass-highlight: rgba(255, 255, 255, 0.06);
            --primary: #2E6BFF;
            --accent: #00D4FF;
            --text: #E6ECF5;
            --text-muted: #93A1BA;
            --silver-line: rgba(200, 208, 226, 0.18);
            --font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            --radius-card: 18px;
            --radius-small: 12px;
            --radius-pill: 50px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.35);
            --shadow-glow: 0 0 24px rgba(0, 212, 255, 0.30);
            --spacer-section: 90px;
        }

        /* ============ Reset / Base ============ */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            background-color: var(--bg);
            background-image:
                radial-gradient(ellipse 55% 40% at 12% 0%, rgba(46, 107, 255, 0.08), transparent 70%),
                radial-gradient(ellipse 45% 40% at 88% 100%, rgba(0, 212, 255, 0.06), transparent 70%);
            color: var(--text);
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.75;
            overflow-x: hidden;
            position: relative;
        }

        body::before {
            content: '';
            position: fixed;
            inset: 0;
            background-image:
                linear-gradient(rgba(255, 255, 255, 0.018) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.018) 1px, transparent 1px);
            background-size: 60px 60px;
            pointer-events: none;
            z-index: 0;
        }

        body::after {
            content: '';
            position: fixed;
            top: -60%;
            left: -20%;
            width: 70vw;
            height: 70vw;
            background: radial-gradient(circle, rgba(46, 107, 255, 0.05), transparent 65%);
            pointer-events: none;
            z-index: 0;
        }

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

        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.25s ease;
        }

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

        ul,
        ol {
            list-style: none;
        }

        button,
        input {
            font-family: inherit;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.35;
            font-weight: 700;
        }

        .container {
            max-width: 1170px;
            position: relative;
            z-index: 1;
        }

        section {
            position: relative;
            z-index: 1;
        }

        /* ============ 通用板块 ============ */
        .section-padding {
            padding: var(--spacer-section) 0;
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.04em;
            color: #9EEBFF;
            background: rgba(0, 212, 255, 0.10);
            border: 1px solid rgba(0, 212, 255, 0.22);
            border-radius: 50px;
            padding: 5px 16px;
            margin-bottom: 16px;
            text-transform: uppercase;
        }

        .section-title {
            font-size: 30px;
            line-height: 38px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 14px;
        }

        .section-desc {
            font-size: 16px;
            color: var(--text-muted);
            max-width: 640px;
            margin-bottom: 40px;
        }

        /* ============ 悬浮导航 ============ */
        .site-header {
            position: fixed;
            top: 14px;
            left: 0;
            right: 0;
            z-index: 200;
            pointer-events: none;
        }

        .site-header .container {
            pointer-events: auto;
        }

        .floating-nav {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 8px 18px;
            background: rgba(10, 14, 26, 0.74);
            -webkit-backdrop-filter: blur(20px);
            backdrop-filter: blur(20px);
            border: 1px solid var(--silver-line);
            border-radius: 60px;
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 18px;
            font-weight: 700;
            color: var(--text);
            padding: 4px 8px;
            border-radius: 50px;
            transition: all 0.3s ease;
        }

        .nav-logo:hover {
            color: var(--accent);
            text-shadow: 0 0 12px rgba(0, 212, 255, 0.25);
        }

        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            font-size: 14px;
            font-weight: 800;
            letter-spacing: 0.02em;
            box-shadow: 0 0 18px rgba(0, 212, 255, 0.35);
        }

        .logo-accent {
            color: var(--accent);
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 4px;
            margin: 0;
            padding: 0;
            list-style: none;
        }

        .nav-link {
            display: inline-block;
            padding: 8px 18px;
            border-radius: 50px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-muted);
            transition: all 0.3s ease;
        }

        .nav-link:hover {
            color: var(--text);
            background: rgba(255, 255, 255, 0.06);
            text-shadow: 0 0 12px rgba(0, 212, 255, 0.2);
        }

        .nav-link.active {
            background: rgba(0, 212, 255, 0.12);
            border: 1px solid rgba(0, 212, 255, 0.25);
            color: #9EEBFF;
            font-weight: 600;
        }

        .btn-nav {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            padding: 8px 22px;
            border-radius: 50px;
            box-shadow: 0 0 16px rgba(0, 212, 255, 0.28);
            transition: all 0.3s ease;
            white-space: nowrap;
        }

        .btn-nav:hover {
            color: #fff;
            filter: brightness(1.1);
            box-shadow: 0 0 28px rgba(0, 212, 255, 0.45);
            transform: translateY(-1px);
        }

        .nav-toggle {
            display: none;
            background: transparent;
            border: 1px solid var(--silver-line);
            color: var(--text);
            border-radius: 12px;
            padding: 8px 12px;
            font-size: 18px;
            line-height: 1;
        }

        /* 移动端下拉 */
        .mobile-menu {
            background: rgba(10, 14, 26, 0.92);
            -webkit-backdrop-filter: blur(20px);
            backdrop-filter: blur(20px);
            border: 1px solid var(--silver-line);
            border-radius: 18px;
            padding: 20px;
            margin-top: 10px;
            display: flex;
            flex-direction: column;
            gap: 5px;
        }

        .mobile-menu a {
            padding: 12px 16px;
            border-radius: 12px;
            color: var(--text-muted);
            font-size: 15px;
            font-weight: 500;
            transition: all 0.3s ease;
        }

        .mobile-menu a:hover,
        .mobile-menu a.active {
            background: rgba(0, 212, 255, 0.08);
            color: #9EEBFF;
        }

        .btn-mobile-cta {
            margin-top: 12px;
            padding: 12px 16px;
            border-radius: 50px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            text-align: center;
            font-weight: 600;
        }

        .btn-mobile-cta:hover {
            color: #fff;
            filter: brightness(1.1);
        }

        /* ============ 通用按钮 ============ */
        .btn-primary-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: linear-gradient(135deg, #2E6BFF, #00D4FF);
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            padding: 14px 36px;
            border: none;
            border-radius: 50px;
            box-shadow: 0 0 20px rgba(0, 212, 255, 0.25), 0 6px 24px rgba(0, 0, 0, 0.2);
            transition: all 0.3s ease;
            cursor: pointer;
            white-space: nowrap;
        }

        .btn-primary-custom:hover {
            color: #fff;
            filter: brightness(1.1);
            transform: translateY(-2px);
            box-shadow: 0 0 32px rgba(0, 212, 255, 0.45), 0 10px 30px rgba(0, 0, 0, 0.25);
        }

        .btn-primary-custom:active {
            transform: translateY(0);
            box-shadow: 0 0 12px rgba(0, 212, 255, 0.3);
        }

        .btn-outline-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.06);
            color: var(--text);
            font-size: 16px;
            font-weight: 500;
            padding: 14px 32px;
            border: 1px solid rgba(255, 255, 255, 0.20);
            border-radius: 50px;
            transition: all 0.3s ease;
            cursor: pointer;
            white-space: nowrap;
            backdrop-filter: blur(10px);
        }

        .btn-outline-custom:hover {
            color: var(--accent);
            border-color: rgba(0, 212, 255, 0.4);
            background: rgba(0, 212, 255, 0.05);
            box-shadow: 0 0 18px rgba(0, 212, 255, 0.1);
        }

        /* ============ Hero ============ */
        .hero {
            min-height: 620px;
            display: flex;
            align-items: center;
            background: linear-gradient(180deg, rgba(10, 14, 26, 0.78), rgba(10, 14, 26, 0.92)), url('/assets/images/backpic/back-1.webp') no-repeat center center / cover;
            padding: 140px 0 80px;
            position: relative;
        }

        .hero-inner {
            max-width: 860px;
        }

        .hero .breadcrumb-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 24px;
            padding: 6px 16px;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--silver-line);
            border-radius: 50px;
        }

        .hero .breadcrumb-custom a {
            color: var(--text-muted);
        }

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

        .hero .breadcrumb-custom i {
            font-size: 10px;
            color: var(--text-muted);
        }

        .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            color: #9EEBFF;
            background: rgba(0, 212, 255, 0.10);
            border: 1px solid rgba(0, 212, 255, 0.22);
            border-radius: 50px;
            padding: 5px 16px;
            margin-bottom: 18px;
        }

        .hero h1 {
            font-size: 42px;
            line-height: 52px;
            font-weight: 800;
            color: var(--text);
            margin-bottom: 20px;
            letter-spacing: 0.01em;
        }

        .hero h1 .text-gradient {
            background: linear-gradient(135deg, #6FA6FF, var(--accent));
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            font-weight: 800;
        }

        .hero-desc {
            font-size: 17px;
            line-height: 1.85;
            color: var(--text-muted);
            max-width: 600px;
            margin-bottom: 36px;
        }

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

        /* ============ 精选卡片网格 ============ */
        .guide-cards-section {
            padding: var(--spacer-section) 0;
        }

        .guide-card {
            background: linear-gradient(160deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.02));
            border: 1px solid var(--card-border);
            border-radius: var(--radius-card);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            overflow: hidden;
            transition: all 0.4s ease;
            height: 100%;
            display: flex;
            flex-direction: column;
            position: relative;
        }

        .guide-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 20px;
            right: 20px;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.25), transparent);
            z-index: 1;
        }

        .guide-card:hover {
            border-color: rgba(0, 212, 255, 0.3);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4), 0 0 20px rgba(0, 212, 255, 0.08);
            transform: translateY(-6px);
        }

        .guide-card-image {
            position: relative;
            overflow: hidden;
            background: linear-gradient(135deg, #101726, #1a2335);
            aspect-ratio: 16 / 9;
        }

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

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

        .guide-card-badge {
            position: absolute;
            top: 14px;
            left: 14px;
            z-index: 2;
            display: inline-flex;
            align-items: center;
            gap: 4px;
            background: rgba(10, 14, 26, 0.7);
            border: 1px solid rgba(0, 212, 255, 0.3);
            color: #9EEBFF;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 50px;
            backdrop-filter: blur(8px);
        }

        .guide-card-body {
            padding: 24px 24px 18px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .guide-card-body h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 10px;
            line-height: 1.4;
        }

        .guide-card-body p {
            font-size: 14px;
            line-height: 1.75;
            color: var(--text-muted);
            flex: 1;
            margin-bottom: 16px;
        }

        .guide-card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--accent);
            transition: gap 0.3s ease;
            margin-top: auto;
        }

        .guide-card-link:hover {
            gap: 12px;
            color: #fff;
        }

        /* 跨列卡片 */
        .guide-card.featured-card .guide-card-body {
            padding: 28px 30px 22px;
        }

        .guide-card.featured-card .guide-card-body h3 {
            font-size: 20px;
        }

        .guide-card.featured-card .guide-card-body p {
            font-size: 15px;
        }

        /* ============ 图文说明区 ============ */
        .media-block {
            padding: 60px 0;
        }

        .media-inner {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
        }

        .media-content {
            padding: 20px 30px;
        }

        .media-content .media-label {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 600;
            color: #9EEBFF;
            background: rgba(0, 212, 255, 0.08);
            border: 1px solid rgba(0, 212, 255, 0.2);
            border-radius: 50px;
            padding: 4px 14px;
            margin-bottom: 14px;
        }

        .media-content h2 {
            font-size: 28px;
            line-height: 36px;
            margin-bottom: 16px;
            color: var(--text);
        }

        .media-content p {
            font-size: 15px;
            color: var(--text-muted);
            margin-bottom: 16px;
            line-height: 1.8;
        }

        .media-content ul {
            margin: 0;
            padding: 0;
        }

        .media-content ul li {
            position: relative;
            padding-left: 22px;
            margin-bottom: 8px;
            font-size: 14px;
            color: var(--text-muted);
        }

        .media-content ul li::before {
            content: '';
            position: absolute;
            left: 0;
            top: 9px;
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--accent);
            box-shadow: 0 0 8px rgba(0, 212, 255, 0.5);
        }

        .media-img-wrap {
            padding: 20px;
        }

        .media-img-frame {
            border-radius: var(--radius-card);
            overflow: hidden;
            border: 1px solid var(--card-border);
            background: linear-gradient(160deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.02));
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
            position: relative;
        }

        .media-img-frame img {
            width: 100%;
            height: auto;
            object-fit: cover;
            border-radius: var(--radius-card);
        }

        .media-img-frame::after {
            content: '';
            position: absolute;
            inset: 0;
            border-radius: var(--radius-card);
            box-shadow: inset 0 0 40px rgba(10, 14, 26, 0.2);
            pointer-events: none;
        }

        .media-img-badge {
            position: absolute;
            bottom: 18px;
            left: 18px;
            background: rgba(10, 14, 26, 0.75);
            border: 1px solid rgba(0, 212, 255, 0.3);
            color: #9EEBFF;
            font-size: 12px;
            font-weight: 600;
            padding: 6px 14px;
            border-radius: 50px;
            backdrop-filter: blur(8px);
            z-index: 2;
        }

        /* ============ FAQ手风琴 ============ */
        .faq-section {
            background-color: var(--bg-elevated);
            background-image: radial-gradient(ellipse 40% 30% at 80% 10%, rgba(0, 212, 255, 0.05), transparent 70%);
            padding: 90px 0;
        }

        .faq-title-wrap {
            text-align: center;
            margin-bottom: 48px;
        }

        .faq-title-wrap .section-tag {
            margin-bottom: 14px;
        }

        .faq-title-wrap h2 {
            font-size: 30px;
            line-height: 38px;
        }

        .faq-title-wrap p {
            color: var(--text-muted);
            max-width: 560px;
            margin: 10px auto 0;
            font-size: 15px;
        }

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

        .accordion-item {
            background: linear-gradient(160deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.01));
            border: 1px solid var(--card-border);
            border-radius: 16px !important;
            backdrop-filter: blur(12px);
            overflow: hidden;
            transition: border-color 0.3s ease;
        }

        .accordion-item:hover {
            border-color: rgba(0, 212, 255, 0.25);
        }

        .accordion-button {
            background: transparent;
            color: var(--text);
            font-size: 15px;
            font-weight: 600;
            padding: 20px 24px;
            box-shadow: none !important;
            border: none;
            transition: background 0.3s ease;
        }

        .accordion-button:not(.collapsed) {
            background: rgba(0, 212, 255, 0.05);
            color: var(--text);
        }

        .accordion-button::after {
            filter: invert(70%) sepia(80%) saturate(300%) hue-rotate(150deg);
            transition: transform 0.3s ease;
        }

        .accordion-button:focus {
            box-shadow: 0 0 0 2px rgba(0, 212, 255, 0.15) !important;
        }

        .accordion-body {
            padding: 0 24px 22px;
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1.8;
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            padding-top: 16px;
        }

        /* ============ CTA 区 ============ */
        .cta-section {
            padding: 90px 0;
        }

        .cta-box {
            position: relative;
            border-radius: 28px;
            background: linear-gradient(120deg, #1B3C8F, #0E5F8A);
            overflow: hidden;
            padding: 72px 40px;
            text-align: center;
            box-shadow: 0 16px 50px rgba(0, 0, 0, 0.4);
        }

        .cta-box::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(115deg, transparent 0%, rgba(255, 255, 255, 0.06) 45%, transparent 60%);
            animation: shimmer 4s ease-in-out infinite;
        }

        @keyframes shimmer {
            0% {
                transform: translateX(-100%);
            }
            60%,
            100% {
                transform: translateX(100%);
            }
        }

        .cta-box::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.35), transparent);
        }

        .cta-box h2 {
            font-size: 32px;
            line-height: 42px;
            color: #fff;
            margin-bottom: 12px;
            position: relative;
            z-index: 1;
        }

        .cta-box p {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.75);
            margin-bottom: 30px;
            position: relative;
            z-index: 1;
        }

        .cta-box .btn-primary-custom {
            background: #fff;
            color: #0E5F8A;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
            position: relative;
            z-index: 1;
        }

        .cta-box .btn-primary-custom:hover {
            filter: brightness(0.95);
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
        }

        .cta-safe-note {
            margin-top: 16px;
            font-size: 12px;
            color: rgba(255, 255, 255, 0.45) !important;
            position: relative;
            z-index: 1;
        }

        /* ============ 页脚 ============ */
        .site-footer {
            background-color: #060910;
            border-top: 1px solid var(--silver-line);
            padding-top: 60px;
            position: relative;
            z-index: 1;
        }

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

        .footer-brand-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 18px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 14px;
        }

        .footer-brand-logo .logo-icon {
            width: 36px;
            height: 36px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            font-size: 14px;
            font-weight: 800;
            display: inline-flex;
            align-items: center;
            justify-content: center;
        }

        .footer-desc {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.8;
            max-width: 280px;
            margin-bottom: 0;
        }

        .footer-col h5 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 16px;
        }

        .footer-links li {
            margin-bottom: 8px;
        }

        .footer-links a {
            font-size: 14px;
            color: var(--text-muted);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: all 0.3s ease;
        }

        .footer-links a i {
            font-size: 10px;
            color: var(--accent);
            opacity: 0.6;
        }

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

        .footer-security p {
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .footer-security p i {
            color: var(--accent);
            width: 16px;
            text-align: center;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 18px 0;
            text-align: center;
            font-size: 13px;
            color: rgba(147, 161, 186, 0.7);
        }

        /* ============ 响应式 ============ */
        @media (max-width: 991.98px) {
            .nav-menu {
                display: none;
            }

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

            .btn-nav {
                display: none;
            }

            .section-padding {
                --spacer-section: 60px;
            }

            .hero {
                min-height: auto;
                padding: 130px 0 60px;
            }

            .hero h1 {
                font-size: 34px;
                line-height: 44px;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 30px;
            }

            .media-inner {
                flex-direction: column;
            }

            .media-content,
            .media-img-wrap {
                padding: 15px 0;
            }
        }

        @media (max-width: 767.98px) {
            .hero h1 {
                font-size: 28px;
                line-height: 38px;
            }

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

            .btn-primary-custom,
            .btn-outline-custom {
                width: 100%;
                justify-content: center;
            }

            .section-title {
                font-size: 26px;
                line-height: 34px;
            }

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

            .media-content h2 {
                font-size: 24px;
                line-height: 32px;
            }

            .cta-box {
                padding: 48px 24px;
            }

            .cta-box h2 {
                font-size: 26px;
                line-height: 34px;
            }

            .floating-nav {
                padding: 8px 12px;
            }

            .nav-logo {
                font-size: 16px;
            }

            .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 13px;
            }
        }

        @media (max-width: 520px) {
            .hero h1 {
                font-size: 25px;
                line-height: 35px;
            }

            .hero .breadcrumb-custom {
                font-size: 12px;
                padding: 4px 12px;
            }

            .guide-card.featured-card .guide-card-body {
                padding: 20px;
            }
        }

        /* ============ Bootstrap 细节覆盖 ============ */
        .btn {
            border-radius: 50px;
        }

        .form-control {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid var(--card-border);
            border-radius: 12px;
            color: var(--text);
        }

        .form-control:focus {
            background: rgba(255, 255, 255, 0.08);
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.12);
            color: var(--text);
        }

        .form-control::placeholder {
            color: rgba(147, 161, 186, 0.6);
        }

        .table {
            --bs-table-color: var(--text);
            --bs-table-bg: transparent;
            --bs-table-border-color: rgba(255, 255, 255, 0.08);
        }

        blockquote {
            border-left: 3px solid var(--accent);
            background: rgba(255, 255, 255, 0.04);
            border-radius: 0 12px 12px 0;
            padding: 16px 20px;
            color: var(--text-muted);
            margin: 24px 0;
        }

/* roulang page: article */
/* ========== 设计变量 ========== */
        :root {
            --bg: #0A0E1A;
            --bg-elevated: #101726;
            --card-bg: rgba(255, 255, 255, 0.04);
            --card-border: rgba(255, 255, 255, 0.10);
            --glass-highlight: rgba(255, 255, 255, 0.06);
            --primary: #2E6BFF;
            --accent: #00D4FF;
            --text: #E6ECF5;
            --text-muted: #93A1BA;
            --silver-line: rgba(200, 208, 226, 0.18);
            --radius-lg: 18px;
            --radius-md: 12px;
            --radius-pill: 50px;
            --shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
            --glow: 0 0 24px rgba(0, 212, 255, 0.30);
            --space-section: 90px;
        }

        /* ========== 基础 Reset ========== */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            background: var(--bg);
            color: var(--text);
            font-size: 16px;
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
            background-image:
                radial-gradient(ellipse at 15% 8%, rgba(46, 107, 255, 0.07), transparent 45%),
                radial-gradient(ellipse at 85% 90%, rgba(0, 212, 255, 0.05), transparent 40%);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        a {
            text-decoration: none;
            color: inherit;
        }
        img {
            max-width: 100%;
            display: block;
        }
        button,
        input {
            font-family: inherit;
        }
        .container {
            max-width: 1170px;
        }

        /* ========== 按钮 ========== */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 14px 36px;
            border-radius: 50px;
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            border: none;
            text-decoration: none;
            box-shadow: 0 0 24px rgba(0, 212, 255, 0.30), 0 8px 32px rgba(0, 0, 0, 0.3);
            transition: all .3s ease;
            cursor: pointer;
        }
        .btn-primary:hover {
            background: linear-gradient(135deg, #3a75ff, #1cdbff);
            transform: translateY(-2px);
            box-shadow: 0 0 32px rgba(0, 212, 255, 0.45), 0 12px 36px rgba(0, 0, 0, 0.35);
            color: #fff;
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 0 18px rgba(0, 212, 255, 0.2);
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 30px;
            border-radius: 50px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text);
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.2);
            text-decoration: none;
            transition: all .3s ease;
            cursor: pointer;
        }
        .btn-secondary:hover {
            border-color: rgba(0, 212, 255, 0.5);
            color: var(--accent);
            background: rgba(255, 255, 255, 0.1);
        }
        .btn-secondary:focus,
        .btn-primary:focus {
            outline: 2px solid rgba(0, 212, 255, 0.5);
            outline-offset: 2px;
        }

        /* ========== 导航 ========== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1040;
            padding-top: 14px;
        }
        .floating-nav {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            background: rgba(10, 14, 26, 0.72);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border: 1px solid var(--silver-line);
            border-radius: 60px;
            padding: 8px 18px;
            box-shadow: var(--shadow);
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 18px;
            font-weight: 700;
            color: var(--text);
            letter-spacing: 0.02em;
            padding: 4px 6px;
            border-radius: 50px;
            transition: all .3s;
        }
        .nav-logo:hover {
            color: #fff;
        }
        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            font-size: 13px;
            font-weight: 800;
            color: #fff;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            box-shadow: 0 0 14px rgba(0, 212, 255, 0.35);
            letter-spacing: 0;
        }
        .logo-accent {
            color: var(--accent);
        }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-link {
            display: block;
            padding: 10px 18px;
            border-radius: 50px;
            color: var(--text-muted);
            font-size: 15px;
            font-weight: 500;
            border: 1px solid transparent;
            transition: all .3s ease;
        }
        .nav-link:hover {
            color: var(--text);
            background: rgba(255, 255, 255, 0.06);
            box-shadow: 0 0 12px rgba(0, 212, 255, 0.15);
        }
        .nav-link.active {
            color: #fff;
            background: linear-gradient(135deg, rgba(46, 107, 255, 0.35), rgba(0, 212, 255, 0.25));
            border-color: rgba(0, 212, 255, 0.3);
            box-shadow: 0 0 16px rgba(0, 212, 255, 0.12);
        }
        .btn-nav {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 22px;
            border-radius: 50px;
            font-size: 14px;
            font-weight: 600;
            color: #fff;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            box-shadow: 0 0 18px rgba(0, 212, 255, 0.25);
            transition: all .3s;
        }
        .btn-nav:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 28px rgba(0, 212, 255, 0.4);
            color: #fff;
        }
        .nav-toggle {
            display: none;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid var(--silver-line);
            color: var(--text);
            font-size: 16px;
            transition: all .3s;
        }
        .nav-toggle:hover {
            border-color: var(--accent);
            color: var(--accent);
        }
        .mobile-menu {
            background: rgba(10, 14, 26, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border: 1px solid var(--silver-line);
            border-radius: 18px;
            padding: 14px;
            margin-top: 10px;
            box-shadow: var(--shadow);
        }
        .mobile-menu a {
            display: block;
            padding: 12px 16px;
            border-radius: 12px;
            color: var(--text-muted);
            font-size: 15px;
            font-weight: 500;
            transition: all .3s;
        }
        .mobile-menu a:hover {
            color: var(--text);
            background: rgba(255, 255, 255, 0.06);
        }
        .mobile-menu a.active {
            color: var(--accent);
            background: rgba(0, 212, 255, 0.08);
        }
        .btn-mobile-cta {
            display: block;
            text-align: center;
            margin-top: 8px;
            padding: 13px 20px;
            border-radius: 50px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff !important;
            font-weight: 600;
            box-shadow: 0 0 18px rgba(0, 212, 255, 0.2);
        }
        .btn-mobile-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 26px rgba(0, 212, 255, 0.35);
        }

        /* ========== 文章页主区域 ========== */
        .article-page {
            padding: 130px 0 var(--space-section);
            flex: 1;
        }
        .breadcrumb-nav {
            max-width: 860px;
            margin: 0 auto 32px;
            font-size: 14px;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
        }
        .breadcrumb-nav a {
            color: var(--text-muted);
            transition: color .3s;
        }
        .breadcrumb-nav a:hover {
            color: var(--accent);
        }
        .breadcrumb-nav .current {
            color: var(--text);
            max-width: 340px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
            display: inline-block;
        }
        .breadcrumb-nav i {
            font-size: 10px;
            color: rgba(200, 208, 226, 0.25);
        }

        /* ========== 文章主体卡片 ========== */
        .article-wrap {
            max-width: 860px;
            margin: 0 auto;
            background: linear-gradient(160deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.02));
            border: 1px solid var(--card-border);
            border-radius: 24px;
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            padding: 56px 72px;
            box-shadow: var(--shadow);
            position: relative;
            overflow: hidden;
        }
        .article-wrap::before {
            content: "";
            position: absolute;
            top: 0;
            left: 24px;
            right: 24px;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
        }
        .article-header {
            margin-bottom: 16px;
        }
        .article-title {
            font-size: 38px;
            line-height: 1.3;
            font-weight: 700;
            letter-spacing: 0.01em;
            color: var(--text);
            margin-bottom: 20px;
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            font-size: 14px;
            color: var(--text-muted);
            padding-bottom: 28px;
            border-bottom: 1px solid var(--silver-line);
            margin-bottom: 32px;
        }
        .article-meta span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .article-meta i {
            color: var(--accent);
            font-size: 13px;
        }
        .article-cover {
            margin-bottom: 36px;
            border-radius: 18px;
            overflow: hidden;
            border: 1px solid var(--card-border);
            box-shadow: var(--shadow);
            position: relative;
        }
        .article-cover img {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
        }
        .article-cover figcaption {
            font-size: 12px;
            color: var(--text-muted);
            padding: 10px 16px;
            background: rgba(13, 20, 36, 0.6);
            border-top: 1px solid var(--card-border);
        }

        /* ========== 正文排版 ========== */
        .article-body {
            font-size: 16px;
            line-height: 1.9;
            color: #CBD2E0;
        }
        .article-body h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--text);
            margin: 40px 0 16px;
            padding-left: 16px;
            border-left: 4px solid var(--accent);
            line-height: 1.4;
        }
        .article-body h3 {
            font-size: 22px;
            font-weight: 600;
            color: var(--text);
            margin: 32px 0 12px;
            line-height: 1.45;
        }
        .article-body h4 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text);
            margin: 24px 0 10px;
        }
        .article-body p {
            margin-bottom: 24px;
        }
        .article-body a {
            color: var(--accent);
            text-decoration: underline;
        }
        .article-body a:hover {
            text-decoration: none;
            color: #fff;
        }
        .article-body ul,
        .article-body ol {
            margin: 0 0 24px 24px;
            color: #CBD2E0;
        }
        .article-body ul li,
        .article-body ol li {
            margin-bottom: 8px;
        }
        .article-body ul li::marker {
            color: var(--accent);
        }
        .article-body ol li::marker {
            color: var(--accent);
            font-weight: 600;
        }
        .article-body strong {
            color: var(--text);
            font-weight: 600;
        }
        .article-body img {
            max-width: 100%;
            border-radius: 12px;
            margin: 24px 0;
            border: 1px solid var(--card-border);
        }
        .article-body blockquote {
            margin: 28px 0;
            padding: 20px 24px;
            border-left: 4px solid var(--accent);
            background: rgba(0, 212, 255, 0.06);
            border-radius: 0 12px 12px 0;
            color: #AFC3D9;
        }
        .article-body blockquote p {
            margin-bottom: 0;
        }
        .article-body code {
            background: rgba(46, 107, 255, 0.12);
            color: #9EEBFF;
            padding: 3px 8px;
            border-radius: 6px;
            font-size: 14px;
            font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
        }
        .article-body pre {
            background: #0d1424;
            border: 1px solid var(--silver-line);
            border-radius: 12px;
            padding: 20px 24px;
            overflow-x: auto;
            margin: 24px 0;
        }
        .article-body pre code {
            background: none;
            padding: 0;
            color: #CBD2E0;
            font-size: 14px;
            line-height: 1.7;
        }
        .article-body table {
            width: 100%;
            border-collapse: collapse;
            margin: 28px 0;
            font-size: 14px;
            background: rgba(13, 20, 36, 0.6);
            border-radius: 12px;
            overflow: hidden;
            border: 1px solid var(--silver-line);
        }
        .article-body thead {
            background: rgba(46, 107, 255, 0.15);
        }
        .article-body thead th {
            color: var(--text);
            font-weight: 600;
            padding: 14px 18px;
            border-bottom: 1px solid rgba(200, 208, 226, 0.15);
            font-size: 15px;
        }
        .article-body tbody td {
            padding: 13px 18px;
            border-bottom: 1px solid rgba(200, 208, 226, 0.06);
            color: #AFC3D9;
        }
        .article-body tbody tr:last-child td {
            border-bottom: none;
        }
        .article-body tbody tr:nth-child(even) {
            background: rgba(255, 255, 255, 0.02);
        }
        .article-body tbody tr:hover {
            background: rgba(0, 212, 255, 0.04);
        }

        /* ========== 标签区 ========== */
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 40px;
            padding-top: 28px;
            border-top: 1px solid var(--silver-line);
        }
        .tag-label {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 16px;
            border-radius: 50px;
            font-size: 13px;
            background: rgba(0, 212, 255, 0.10);
            color: #9EEBFF;
            border: 1px solid rgba(0, 212, 255, 0.22);
            transition: all .3s ease;
        }
        .tag-label:hover {
            background: rgba(0, 212, 255, 0.18);
            border-color: rgba(0, 212, 255, 0.4);
            color: #fff;
        }

        /* ========== 返回按钮 ========== */
        .article-back {
            text-align: center;
            margin-top: 40px;
        }

        /* ========== 相关推荐 ========== */
        .related-posts {
            max-width: 860px;
            margin: 56px auto 0;
        }
        .related-posts .section-title {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 24px;
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .related-posts .section-title::after {
            content: "";
            flex: 1;
            height: 1px;
            background: linear-gradient(90deg, var(--silver-line), transparent);
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: linear-gradient(160deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.02));
            border: 1px solid var(--card-border);
            border-radius: 18px;
            overflow: hidden;
            transition: all .35s ease;
            display: block;
            position: relative;
        }
        .related-card:hover {
            border-color: rgba(0, 212, 255, 0.35);
            transform: translateY(-4px);
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.35), 0 0 24px rgba(0, 212, 255, 0.12);
        }
        .related-card img {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
        }
        .related-card-body {
            padding: 18px 20px 22px;
        }
        .related-tag {
            font-size: 12px;
            color: #9EEBFF;
            background: rgba(0, 212, 255, 0.10);
            border: 1px solid rgba(0, 212, 255, 0.22);
            padding: 3px 10px;
            border-radius: 50px;
            display: inline-block;
            margin-bottom: 10px;
        }
        .related-card h3 {
            font-size: 16px;
            font-weight: 600;
            line-height: 1.5;
            color: var(--text);
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 0;
        }
        .card-link {
            font-size: 13px;
            color: var(--accent);
            margin-top: 12px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: gap .3s;
        }
        .related-card:hover .card-link {
            gap: 10px;
        }

        /* ========== CTA 条 ========== */
        .cta-bar {
            margin-top: var(--space-section);
        }
        .cta-inner {
            max-width: 860px;
            margin: 0 auto;
            padding: 48px 56px;
            border-radius: 24px;
            background: linear-gradient(135deg, rgba(46, 107, 255, 0.88), rgba(0, 212, 255, 0.78));
            text-align: center;
            position: relative;
            overflow: hidden;
            box-shadow: 0 8px 40px rgba(0, 212, 255, 0.25);
        }
        .cta-inner::after {
            content: "";
            position: absolute;
            top: -60%;
            left: -20%;
            width: 140%;
            height: 220%;
            background: linear-gradient(115deg, transparent 0%, rgba(255, 255, 255, 0.18) 30%, transparent 60%);
            transform: rotate(12deg);
            pointer-events: none;
        }
        .cta-inner h3 {
            color: #fff;
            font-size: 26px;
            font-weight: 700;
            position: relative;
            z-index: 1;
        }
        .cta-inner p {
            color: rgba(255, 255, 255, 0.88);
            font-size: 15px;
            margin-top: 8px;
            position: relative;
            z-index: 1;
        }
        .cta-inner .btn-primary {
            position: relative;
            z-index: 1;
            margin-top: 20px;
            background: #fff;
            color: var(--primary);
            box-shadow: 0 0 24px rgba(255, 255, 255, 0.35);
        }
        .cta-inner .btn-primary:hover {
            background: #f0f7ff;
            box-shadow: 0 0 32px rgba(255, 255, 255, 0.5);
        }

        /* ========== 内容未找到 ========== */
        .not-found {
            text-align: center;
            padding: 80px 32px;
        }
        .not-found i {
            font-size: 48px;
            color: var(--accent);
            opacity: 0.6;
            margin-bottom: 16px;
        }
        .not-found h2 {
            font-size: 26px;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .not-found p {
            color: var(--text-muted);
            margin-bottom: 24px;
        }

        /* ========== 页脚 ========== */
        .site-footer {
            background: #060910;
            border-top: 1px solid var(--silver-line);
            padding: 60px 0 0;
            margin-top: auto;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.4fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(200, 208, 226, 0.08);
        }
        .footer-brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 16px;
        }
        .footer-brand-logo .logo-icon {
            width: 38px;
            height: 38px;
            font-size: 14px;
        }
        .footer-desc {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.8;
            max-width: 360px;
        }
        .footer-col h5 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 16px;
        }
        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            color: var(--text-muted);
            font-size: 14px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: all .3s;
        }
        .footer-links a:hover {
            color: var(--accent);
            padding-left: 4px;
        }
        .footer-links a i {
            font-size: 10px;
            color: rgba(0, 212, 255, 0.5);
        }
        .footer-security p {
            color: var(--text-muted);
            font-size: 14px;
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 10px;
        }
        .footer-security p i {
            color: var(--accent);
        }
        .footer-bottom {
            padding: 20px 0;
            text-align: center;
            font-size: 13px;
            color: #5B6A82;
        }
        .footer-bottom p {
            margin: 0;
        }

        /* ========== 响应式 ========== */
        @media (max-width: 991px) {
            :root {
                --space-section: 70px;
            }
            .nav-menu {
                display: none;
            }
            .btn-nav {
                display: none;
            }
            .nav-toggle {
                display: inline-flex;
            }
            .floating-nav {
                padding: 8px 12px;
            }
            .article-page {
                padding-top: 110px;
            }
            .article-wrap {
                padding: 44px 40px;
            }
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }
        @media (max-width: 767px) {
            :root {
                --space-section: 56px;
            }
            .article-page {
                padding-top: 96px;
            }
            .article-wrap {
                padding: 32px 22px;
                border-radius: 20px;
            }
            .article-title {
                font-size: 26px;
                line-height: 1.35;
            }
            .article-meta {
                gap: 12px;
                margin-bottom: 24px;
                padding-bottom: 20px;
            }
            .article-body {
                font-size: 15px;
                line-height: 1.8;
            }
            .article-body h2 {
                font-size: 22px;
            }
            .article-body h3 {
                font-size: 19px;
            }
            .related-grid {
                grid-template-columns: 1fr;
            }
            .cta-inner {
                padding: 36px 24px;
                border-radius: 18px;
            }
            .cta-inner h3 {
                font-size: 22px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .breadcrumb-nav .current {
                max-width: 220px;
            }
        }
        @media (max-width: 520px) {
            .nav-logo {
                font-size: 16px;
            }
            .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 12px;
            }
            .floating-nav {
                padding: 6px 10px;
            }
            .article-wrap {
                padding: 24px 16px;
            }
            .article-title {
                font-size: 22px;
            }
            .article-body {
                font-size: 14.5px;
            }
            .btn-nav {
                display: none;
            }
        }

/* roulang page: category2 */
:root {
            --bg: #0A0E1A;
            --bg-elevated: #101726;
            --card-bg: rgba(255, 255, 255, 0.04);
            --card-border: rgba(255, 255, 255, 0.10);
            --glass-highlight: rgba(255, 255, 255, 0.06);
            --primary: #2E6BFF;
            --accent: #00D4FF;
            --text: #E6ECF5;
            --text-muted: #93A1BA;
            --silver-line: rgba(200, 208, 226, 0.18);
            --radius-card: 18px;
            --radius-btn: 50px;
            --radius-small: 12px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.35);
            --glow: 0 0 24px rgba(0, 212, 255, 0.30);
            --font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-family);
            background-color: var(--bg);
            color: var(--text);
            line-height: 1.75;
            font-size: 16px;
            overflow-x: hidden;
        }

        body::before {
            content: '';
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background:
                radial-gradient(ellipse 60% 40% at 15% 0%, rgba(46, 107, 255, 0.07) 0%, transparent 70%),
                radial-gradient(ellipse 50% 40% at 85% 100%, rgba(0, 212, 255, 0.06) 0%, transparent 70%),
                linear-gradient(rgba(200, 208, 226, 0.025) 1px, transparent 1px),
                linear-gradient(90deg, rgba(200, 208, 226, 0.025) 1px, transparent 1px);
            background-size: 60px 60px, 60px 60px, 60px 60px, 60px 60px;
            background-repeat: no-repeat, no-repeat, repeat, repeat;
            pointer-events: none;
            z-index: 0;
        }

        .container {
            max-width: 1170px;
            position: relative;
            z-index: 1;
        }

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

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

        /* ===== 导航 ===== */
        .site-header {
            position: relative;
            z-index: 1000;
            padding-top: 14px;
        }

        .floating-nav {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 8px 16px;
            background: rgba(10, 14, 26, 0.72);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border: 1px solid var(--silver-line);
            border-radius: 60px;
            box-shadow: var(--shadow-card);
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 18px;
            font-weight: 700;
            color: var(--text);
            letter-spacing: 0.02em;
            white-space: nowrap;
        }

        .nav-logo .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            font-size: 14px;
            font-weight: 800;
            letter-spacing: 0;
            box-shadow: 0 0 16px rgba(0, 212, 255, 0.25);
        }

        .nav-logo .logo-accent {
            color: var(--accent);
        }

        .nav-menu {
            display: flex;
            list-style: none;
            gap: 6px;
            margin: 0;
            padding: 0;
        }

        .nav-menu .nav-link {
            display: inline-block;
            padding: 8px 18px;
            border-radius: 50px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-muted);
            transition: all .3s ease;
        }

        .nav-menu .nav-link:hover,
        .nav-menu .nav-link:focus {
            color: var(--text);
            text-shadow: 0 0 12px rgba(0, 212, 255, 0.35);
        }

        .nav-menu .nav-link.active {
            background: rgba(0, 212, 255, 0.12);
            border: 1px solid rgba(0, 212, 255, 0.25);
            color: #9EEBFF;
            font-weight: 600;
            box-shadow: 0 0 20px rgba(0, 212, 255, 0.10);
        }

        .btn-nav {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 9px 22px;
            border-radius: 50px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            box-shadow: 0 0 18px rgba(0, 212, 255, 0.25), inset 0 1px 0 rgba(255, 255, 255, 0.15);
            transition: all .3s ease;
            white-space: nowrap;
        }

        .btn-nav:hover {
            transform: translateY(-2px);
            filter: brightness(1.1);
            box-shadow: 0 4px 28px rgba(0, 212, 255, 0.4);
            color: #fff;
        }

        .nav-toggle {
            display: none;
            background: transparent;
            border: 1px solid var(--silver-line);
            border-radius: 12px;
            color: var(--text);
            padding: 7px 12px;
            font-size: 16px;
            cursor: pointer;
        }

        .mobile-menu {
            margin-top: 10px;
            background: rgba(10, 14, 26, 0.92);
            backdrop-filter: blur(18px);
            border: 1px solid var(--silver-line);
            border-radius: 16px;
            padding: 16px;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .mobile-menu a {
            padding: 10px 14px;
            border-radius: 10px;
            color: var(--text-muted);
            font-size: 15px;
        }

        .mobile-menu a.active {
            background: rgba(0, 212, 255, 0.10);
            color: #9EEBFF;
        }

        .mobile-menu .btn-mobile-cta {
            margin-top: 6px;
            text-align: center;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            font-weight: 600;
            border-radius: 50px;
            padding: 12px 20px;
        }

        /* ===== 通用按钮 ===== */
        .btn-primary-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 38px;
            border-radius: var(--radius-btn);
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            box-shadow: 0 0 24px rgba(0, 212, 255, 0.30), inset 0 1px 0 rgba(255, 255, 255, 0.15);
            transition: all .35s ease;
        }

        .btn-primary-custom:hover {
            transform: translateY(-2px);
            filter: brightness(1.1);
            box-shadow: 0 6px 40px rgba(0, 212, 255, 0.45);
            color: #fff;
        }

        .btn-primary-custom:active {
            transform: translateY(0);
            box-shadow: 0 2px 16px rgba(0, 212, 255, 0.25);
        }

        .btn-outline-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 34px;
            border-radius: var(--radius-btn);
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.22);
            color: var(--text);
            font-size: 15px;
            font-weight: 500;
            cursor: pointer;
            transition: all .3s ease;
        }

        .btn-outline-custom:hover {
            border-color: rgba(0, 212, 255, 0.5);
            color: #9EEBFF;
            background: rgba(0, 212, 255, 0.06);
        }

        /* ===== 面包屑 ===== */
        .breadcrumb-bar {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            align-items: center;
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 18px;
        }

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

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

        .breadcrumb-bar .sep {
            opacity: 0.5;
        }

        .breadcrumb-bar .current {
            color: #9EEBFF;
        }

        /* ===== Hero 区 ===== */
        .category-hero {
            position: relative;
            padding: 130px 0 90px;
            background: linear-gradient(180deg, rgba(10, 14, 26, 0.55) 0%, var(--bg) 100%);
        }

        .category-hero .hero-bg-img {
            position: absolute;
            inset: 0;
            z-index: 0;
            object-fit: cover;
            width: 100%;
            height: 100%;
            opacity: 0.45;
        }

        .category-hero .hero-overlay {
            position: absolute;
            inset: 0;
            z-index: 1;
            background: linear-gradient(90deg, rgba(10, 14, 26, 0.82) 20%, rgba(10, 14, 26, 0.45) 60%, rgba(10, 14, 26, 0.72) 100%);
        }

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

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 18px;
            border-radius: 50px;
            background: rgba(0, 212, 255, 0.12);
            border: 1px solid rgba(0, 212, 255, 0.25);
            color: #9EEBFF;
            font-size: 13px;
            font-weight: 500;
            margin-bottom: 20px;
            letter-spacing: 0.04em;
        }

        .category-hero h1 {
            font-size: 42px;
            line-height: 1.25;
            font-weight: 700;
            letter-spacing: 0.01em;
            color: var(--text);
            margin-bottom: 18px;
        }

        .category-hero h1 .highlight {
            color: var(--accent);
            text-shadow: 0 0 24px rgba(0, 212, 255, 0.4);
        }

        .hero-subtitle {
            font-size: 17px;
            line-height: 1.8;
            color: var(--text-muted);
            max-width: 640px;
            margin-bottom: 28px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-bottom: 20px;
        }

        .hero-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 18px;
            margin-top: 22px;
            font-size: 14px;
            color: var(--text-muted);
        }

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

        .hero-meta i {
            color: var(--accent);
        }

        /* ===== 精选卡片网格 ===== */
        .section-featured {
            padding: 80px 0 70px;
            position: relative;
        }

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

        .section-eyebrow {
            display: inline-block;
            padding: 5px 16px;
            border-radius: 50px;
            background: rgba(0, 212, 255, 0.10);
            border: 1px solid rgba(0, 212, 255, 0.22);
            color: #9EEBFF;
            font-size: 13px;
            font-weight: 500;
            letter-spacing: 0.05em;
            margin-bottom: 16px;
        }

        .section-header h2 {
            font-size: 32px;
            font-weight: 700;
            line-height: 1.35;
            margin-bottom: 14px;
        }

        .section-header p {
            color: var(--text-muted);
            font-size: 15px;
            max-width: 640px;
            margin: 0 auto;
        }

        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .glass-card {
            background: linear-gradient(160deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.02));
            border: 1px solid var(--card-border);
            border-radius: var(--radius-card);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            overflow: hidden;
            position: relative;
            transition: all .35s ease;
        }

        .glass-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 12%;
            right: 12%;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.25), transparent);
        }

        .glass-card:hover {
            border-color: rgba(0, 212, 255, 0.35);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.45), 0 0 20px rgba(0, 212, 255, 0.08);
            transform: translateY(-4px);
        }

        .card-cover {
            position: relative;
            aspect-ratio: 16/9;
            overflow: hidden;
            background: var(--bg-elevated);
        }

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

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

        .card-cover .cover-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            z-index: 2;
            padding: 4px 12px;
            border-radius: 50px;
            background: rgba(0, 212, 255, 0.20);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(0, 212, 255, 0.30);
            color: #C7F4FF;
            font-size: 12px;
            font-weight: 500;
        }

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

        .card-body-content h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 10px;
            line-height: 1.45;
        }

        .card-body-content p {
            font-size: 14px;
            line-height: 1.7;
            color: var(--text-muted);
            margin-bottom: 14px;
        }

        .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--accent);
            transition: gap .3s ease;
        }

        .card-link:hover {
            gap: 12px;
            color: #fff;
        }

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

        /* ===== 图文说明区 ===== */
        .section-detail {
            padding: 80px 0;
            background: var(--bg-elevated);
            position: relative;
            overflow: hidden;
        }

        .section-detail::before {
            content: '';
            position: absolute;
            width: 500px;
            height: 500px;
            border-radius: 50%;
            background: rgba(0, 212, 255, 0.05);
            filter: blur(120px);
            top: 10%;
            right: -100px;
            pointer-events: none;
        }

        .detail-grid {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 56px;
            align-items: center;
        }

        .detail-text .section-eyebrow {
            margin-bottom: 14px;
        }

        .detail-text h2 {
            font-size: 30px;
            font-weight: 700;
            line-height: 1.35;
            margin-bottom: 18px;
        }

        .detail-text .detail-desc {
            font-size: 15px;
            line-height: 1.8;
            color: var(--text-muted);
            margin-bottom: 24px;
        }

        .detail-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .detail-list-item {
            display: flex;
            gap: 14px;
            align-items: flex-start;
            padding: 16px 18px;
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid rgba(255, 255, 255, 0.07);
            border-radius: 14px;
            transition: all .3s ease;
        }

        .detail-list-item:hover {
            border-color: rgba(0, 212, 255, 0.25);
            background: rgba(255, 255, 255, 0.05);
        }

        .detail-list-item .item-icon {
            flex-shrink: 0;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(0, 212, 255, 0.12);
            border: 1px solid rgba(0, 212, 255, 0.22);
            color: var(--accent);
            font-size: 16px;
        }

        .detail-list-item h4 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 4px;
        }

        .detail-list-item p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
            margin: 0;
        }

        .detail-image {
            position: relative;
        }

        .detail-image .image-frame {
            position: relative;
            border-radius: var(--radius-card);
            overflow: hidden;
            border: 1px solid var(--card-border);
            box-shadow: var(--shadow-card);
        }

        .detail-image .image-frame img {
            width: 100%;
            aspect-ratio: 4/3;
            object-fit: cover;
            display: block;
        }

        .detail-image .image-frame::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 60%, rgba(10, 14, 26, 0.45) 100%);
        }

        .image-badge {
            position: absolute;
            bottom: 18px;
            left: 18px;
            z-index: 2;
            padding: 6px 16px;
            border-radius: 50px;
            background: rgba(10, 14, 26, 0.7);
            backdrop-filter: blur(10px);
            border: 1px solid rgba(0, 212, 255, 0.3);
            color: #C7F4FF;
            font-size: 13px;
            font-weight: 500;
        }

        /* ===== 流程步骤区 ===== */
        .section-steps {
            padding: 80px 0;
        }

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

        .step-card {
            text-align: center;
            padding: 32px 20px;
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid rgba(255, 255, 255, 0.07);
            border-radius: var(--radius-card);
            position: relative;
            transition: all .3s ease;
        }

        .step-card:hover {
            border-color: rgba(0, 212, 255, 0.28);
            background: rgba(255, 255, 255, 0.05);
        }

        .step-number {
            width: 52px;
            height: 52px;
            margin: 0 auto 18px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 700;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            box-shadow: 0 0 20px rgba(0, 212, 255, 0.3);
        }

        .step-card h3 {
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 8px;
        }

        .step-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.65;
            margin: 0;
        }

        .step-arrow {
            position: absolute;
            right: -14px;
            top: 50%;
            transform: translateY(-50%);
            color: rgba(0, 212, 255, 0.4);
            font-size: 14px;
            z-index: 2;
        }

        /* ===== FAQ 区 ===== */
        .section-faq {
            padding: 80px 0;
            background: var(--bg-elevated);
            position: relative;
        }

        .faq-wrap {
            max-width: 860px;
            margin: 0 auto;
        }

        .faq-item {
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: 14px;
            margin-bottom: 14px;
            overflow: hidden;
            transition: all .3s ease;
        }

        .faq-item:hover {
            border-color: rgba(0, 212, 255, 0.2);
        }

        .faq-item .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 22px;
            cursor: pointer;
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
        }

        .faq-item .faq-question .faq-icon {
            flex-shrink: 0;
            width: 26px;
            height: 26px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(0, 212, 255, 0.12);
            color: var(--accent);
            font-size: 13px;
            transition: transform .3s ease;
        }

        .faq-item[aria-expanded="true"] .faq-icon,
        .faq-item.active .faq-icon {
            transform: rotate(45deg);
        }

        .faq-item .faq-answer {
            padding: 0 22px 20px;
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.75;
            background: rgba(255, 255, 255, 0.02);
            border-top: 1px solid rgba(255, 255, 255, 0.05);
        }

        /* ===== CTA 区 ===== */
        .section-cta {
            padding: 70px 0;
        }

        .cta-box {
            background: linear-gradient(135deg, rgba(46, 107, 255, 0.75), rgba(0, 212, 255, 0.65));
            border-radius: 24px;
            padding: 56px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
            box-shadow: 0 12px 48px rgba(0, 0, 0, 0.4), 0 0 40px rgba(0, 212, 255, 0.15);
        }

        .cta-box::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background:
                linear-gradient(100deg, transparent 20%, rgba(255, 255, 255, 0.08) 40%, transparent 60%);
            transform: translateX(-100%);
            animation: shimmer 4s ease-in-out infinite;
        }

        @keyframes shimmer {
            0%, 60% { transform: translateX(-100%); }
            100% { transform: translateX(100%); }
        }

        .cta-box h2 {
            font-size: 32px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
            position: relative;
            z-index: 1;
            text-shadow: 0 2px 12px rgba(0, 0, 0, 0.2);
        }

        .cta-box p {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.9);
            margin-bottom: 28px;
            position: relative;
            z-index: 1;
        }

        .cta-box .btn-primary-custom {
            background: #fff;
            color: #0A0E1A;
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.2);
            position: relative;
            z-index: 1;
        }

        .cta-box .btn-primary-custom:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.25);
        }

        .cta-safe {
            margin-top: 16px;
            font-size: 12px;
            color: rgba(255, 255, 255, 0.7);
            position: relative;
            z-index: 1;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: #060910;
            border-top: 1px solid var(--silver-line);
            padding: 60px 0 24px;
            position: relative;
            z-index: 1;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 0.8fr 0.9fr 1.1fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 18px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 14px;
        }

        .footer-brand-logo .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            font-size: 14px;
            font-weight: 800;
        }

        .footer-brand-logo .logo-accent {
            color: var(--accent);
        }

        .footer-desc {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        .footer-col h5 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 18px;
        }

        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .footer-links a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-muted);
            transition: all .25s ease;
        }

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

        .footer-links a i {
            font-size: 11px;
            color: rgba(0, 212, 255, 0.6);
        }

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

        .footer-security i {
            color: var(--accent);
            width: 18px;
            text-align: center;
        }

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

        .footer-bottom a {
            color: var(--text-muted);
        }

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

        /* ===== 响应式 ===== */
        @media (max-width: 991.98px) {
            .nav-menu {
                display: none;
            }

            .btn-nav {
                display: none;
            }

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

            .category-hero {
                padding: 110px 0 70px;
            }

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

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

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

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

            .step-arrow {
                display: none;
            }

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

        @media (max-width: 767.98px) {
            .container {
                padding-left: 20px;
                padding-right: 20px;
            }

            .floating-nav {
                padding: 6px 12px;
            }

            .nav-logo {
                font-size: 16px;
            }

            .nav-logo .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 12px;
            }

            .category-hero {
                padding: 90px 0 60px;
            }

            .category-hero h1 {
                font-size: 26px;
                line-height: 1.35;
            }

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

            .hero-actions {
                flex-direction: column;
                gap: 10px;
            }

            .btn-primary-custom,
            .btn-outline-custom {
                width: 100%;
                justify-content: center;
            }

            .section-featured, .section-detail, .section-steps, .section-faq, .section-cta {
                padding: 56px 0;
            }

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

            .card-grid .card-span-2 {
                grid-column: span 1;
            }

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

            .detail-text h2 {
                font-size: 24px;
            }

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

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

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

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

            .section-cta {
                padding: 56px 0;
            }

            .hero-meta {
                flex-direction: column;
                gap: 10px;
            }
        }

        @media (max-width: 520px) {
            .nav-logo span:last-child {
                font-size: 14px;
            }

            .category-hero h1 {
                font-size: 23px;
            }

            .section-header h2 {
                font-size: 22px;
            }

            .card-body-content {
                padding: 18px 16px 22px;
            }

            .detail-list-item {
                flex-direction: column;
            }

            .faq-item .faq-question {
                padding: 14px 16px;
                font-size: 14px;
            }

            .faq-item .faq-answer {
                padding: 0 16px 16px;
                font-size: 13px;
            }

            .cta-box {
                padding: 32px 18px;
            }

            .cta-box h2 {
                font-size: 21px;
            }
        }