:root {
            --primary: #1e5eff;
            --primary-dark: #1648c4;
            --primary-light: #eaf0ff;
            --accent: #f5a623;
            --dark: #0f1c3f;
            --bg: #f5f7fb;
            --card: #ffffff;
            --text: #16203a;
            --text-weak: #6d7a92;
            --border: #e4e9f2;
            --radius-lg: 18px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --shadow-sm: 0 4px 16px rgba(15, 28, 63, 0.06);
            --shadow: 0 10px 32px rgba(15, 28, 63, 0.08);
            --shadow-lg: 0 20px 48px rgba(15, 28, 63, 0.14);
            --transition: all .3s ease;
        }
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; }
        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            color: var(--text);
            background: var(--bg);
            line-height: 1.65;
            -webkit-font-smoothing: antialiased;
        }
        img { max-width: 100%; display: block; }
        a { text-decoration: none; color: inherit; }
        ul, ol { list-style: none; }
        button { font-family: inherit; cursor: pointer; border: none; background: none; }
        input, select, textarea { font-family: inherit; font-size: 14px; color: var(--text); }
        .container { width: min(1200px, 92%); margin: 0 auto; }

        .btn {
            display: inline-flex; align-items: center; justify-content: center; gap: 8px;
            padding: 12px 28px; border-radius: 50px; font-size: 15px; font-weight: 600;
            line-height: 1.2; border: 2px solid transparent; transition: var(--transition);
            cursor: pointer; white-space: nowrap;
        }
        .btn-primary { background: var(--primary); color: #fff; box-shadow: 0 8px 24px rgba(30, 94, 255, .3); }
        .btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 12px 30px rgba(30, 94, 255, .4); }
        .btn-primary:active { transform: translateY(0); box-shadow: 0 4px 12px rgba(30, 94, 255, .25); }
        .btn-primary:focus-visible { outline: 3px solid rgba(30, 94, 255, .35); outline-offset: 2px; }
        .btn-outline { border-color: rgba(255, 255, 255, .75); color: #fff; background: transparent; }
        .btn-outline:hover { background: rgba(255, 255, 255, .12); border-color: #fff; transform: translateY(-2px); }
        .btn-outline:active { transform: translateY(0); }
        .btn-outline:focus-visible { outline: 3px solid rgba(255, 255, 255, .35); outline-offset: 2px; }
        .btn-outline-dark { border-color: var(--dark); color: var(--dark); background: transparent; }
        .btn-outline-dark:hover { background: var(--dark); color: #fff; transform: translateY(-2px); }
        .btn-outline-dark:focus-visible { outline: 3px solid rgba(15, 28, 63, .2); outline-offset: 2px; }
        .btn-lg { padding: 15px 36px; font-size: 16px; }
        .btn-sm { padding: 8px 18px; font-size: 14px; border-radius: 30px; }
        .btn-block { width: 100%; }
        .btn-light { background: #fff; color: var(--dark); box-shadow: 0 4px 14px rgba(0, 0, 0, .08); }
        .btn-light:hover { background: var(--primary-light); transform: translateY(-2px); }

        .section { padding: 90px 0; }
        .section-head { max-width: 720px; margin: 0 auto 55px; text-align: center; }
        .section-tag {
            display: inline-block; background: var(--primary-light); color: var(--primary);
            font-size: 13px; font-weight: 600; padding: 6px 16px; border-radius: 30px;
            letter-spacing: .5px; margin-bottom: 14px;
        }
        .section-head h2 { font-size: clamp(1.5rem, 3vw, 2.2rem); font-weight: 700; line-height: 1.3; margin-bottom: 14px; color: var(--dark); }
        .section-desc { color: var(--text-weak); font-size: 15px; line-height: 1.7; }

        .site-header {
            position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
            background: rgba(255, 255, 255, .72);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(255, 255, 255, .35);
            transition: var(--transition);
        }
        .site-header.scrolled { background: rgba(255, 255, 255, .96); box-shadow: var(--shadow-sm); }
        .navbar { display: flex; align-items: center; justify-content: space-between; height: 72px; gap: 20px; }
        .brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; color: var(--dark); }
        .brand-icon {
            width: 38px; height: 38px; border-radius: 10px; background: linear-gradient(135deg, var(--primary), #0f1c3f);
            display: flex; align-items: center; justify-content: center; color: #fff; font-size: 16px;
        }
        .nav-menu { display: flex; align-items: center; gap: 6px; }
        .nav-link {
            display: block; padding: 10px 18px; border-radius: 30px; font-size: 15px; font-weight: 500;
            color: var(--text); transition: var(--transition); position: relative;
        }
        .nav-link:hover { color: var(--primary); background: var(--primary-light); }
        .nav-link.active { color: var(--primary); background: var(--primary-light); font-weight: 600; }
        .nav-link:focus-visible { outline: 3px solid rgba(30, 94, 255, .25); outline-offset: 2px; }
        .nav-cta { margin-left: 8px; }
        .nav-toggle { display: none; flex-direction: column; gap: 5px; padding: 10px; }
        .nav-toggle span { display: block; width: 22px; height: 2px; background: var(--dark); border-radius: 2px; transition: var(--transition); }
        .nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
        .nav-toggle.open span:nth-child(2) { opacity: 0; }
        .nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

        .hero {
            position: relative; min-height: 92vh; display: flex; align-items: center;
            padding: 150px 0 90px; overflow: hidden;
        }
        .hero-bg { position: absolute; inset: 0; background-size: cover; background-position: center; z-index: -2; }
        .hero-overlay {
            position: absolute; inset: 0; z-index: -1;
            background: linear-gradient(100deg, rgba(10, 16, 35, .94) 0%, rgba(10, 16, 35, .78) 50%, rgba(10, 16, 35, .45) 100%);
        }
        .hero-inner { display: grid; grid-template-columns: 1.05fr .95fr; gap: 60px; align-items: center; }
        .hero-badge {
            display: inline-flex; align-items: center; gap: 8px; background: rgba(255, 255, 255, .12);
            color: #fff; font-size: 13px; font-weight: 500; padding: 7px 16px; border-radius: 30px;
            border: 1px solid rgba(255, 255, 255, .18); backdrop-filter: blur(8px); margin-bottom: 22px;
        }
        .hero-badge i { color: var(--accent); }
        .hero h1 { font-size: clamp(1.6rem, 3.4vw, 2.6rem); font-weight: 700; color: #fff; line-height: 1.35; margin-bottom: 20px; }
        .hero-desc { color: rgba(255, 255, 255, .82); font-size: 15px; line-height: 1.8; max-width: 540px; margin-bottom: 32px; }
        .hero-actions { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 40px; }
        .hero-stats { display: flex; gap: 36px; flex-wrap: wrap; }
        .stat-item { display: flex; flex-direction: column; }
        .stat-item strong { font-size: 26px; color: #fff; font-weight: 700; line-height: 1.2; }
        .stat-item span { font-size: 13px; color: rgba(255, 255, 255, .65); margin-top: 4px; }

        .demo-panel {
            background: rgba(255, 255, 255, .96); border-radius: var(--radius-lg);
            box-shadow: 0 30px 80px rgba(0, 0, 0, .35); overflow: hidden;
            border: 1px solid rgba(255, 255, 255, .2);
        }
        .demo-top {
            display: flex; align-items: center; gap: 8px; padding: 14px 18px;
            background: #f0f2f6; border-bottom: 1px solid var(--border);
        }
        .demo-dot { width: 10px; height: 10px; border-radius: 50%; display: inline-block; }
        .demo-dot.red { background: #ff5f57; }
        .demo-dot.yellow { background: #febc2e; }
        .demo-dot.green { background: #28c840; }
        .demo-label { margin-left: 10px; font-size: 12px; color: var(--text-weak); font-weight: 500; }
        .demo-tabs { display: flex; gap: 4px; padding: 16px 18px 0; }
        .demo-tab {
            padding: 8px 16px; border-radius: 20px; font-size: 13px; font-weight: 500;
            background: #f0f2f6; color: var(--text-weak); cursor: pointer; transition: var(--transition);
        }
        .demo-tab.active { background: var(--primary); color: #fff; }
        .demo-list { padding: 16px 18px 18px; display: flex; flex-direction: column; gap: 10px; }
        .demo-item {
            display: flex; align-items: center; gap: 14px; padding: 10px; border-radius: var(--radius-md);
            background: #fafbfd; border: 1px solid transparent; transition: var(--transition);
        }
        .demo-item:hover { background: var(--primary-light); border-color: rgba(30, 94, 255, .15); transform: translateX(3px); }
        .demo-thumb { width: 62px; height: 62px; border-radius: var(--radius-sm); background-size: cover; background-position: center; flex-shrink: 0; }
        .demo-info { flex: 1; min-width: 0; }
        .demo-info strong { display: block; font-size: 14px; color: var(--dark); font-weight: 600; margin-bottom: 3px; }
        .demo-rating { color: var(--accent); font-size: 11px; margin-bottom: 3px; display: inline-flex; gap: 2px; }
        .demo-info small { font-size: 12px; color: var(--text-weak); }
        .demo-foot { padding: 0 18px 18px; text-align: center; }

        .section-benefits { background: var(--card); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
        .benefit-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
        .benefit-card {
            background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius-lg);
            padding: 34px 26px; transition: var(--transition); text-align: center;
        }
        .benefit-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); border-color: transparent; }
        .benefit-icon {
            width: 54px; height: 54px; border-radius: 14px; display: flex; align-items: center; justify-content: center;
            font-size: 22px; margin: 0 auto 18px;
        }
        .benefit-icon.blue { background: #eaf0ff; color: var(--primary); }
        .benefit-icon.green { background: #e6f7ed; color: #1a9c50; }
        .benefit-icon.orange { background: #fff3e0; color: #e58a00; }
        .benefit-icon.purple { background: #f0eafe; color: #7c4de8; }
        .benefit-card h3 { font-size: 17px; font-weight: 600; color: var(--dark); margin-bottom: 10px; }
        .benefit-card p { font-size: 14px; color: var(--text-weak); line-height: 1.7; }

        .audience-wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
        .audience-media { position: relative; }
        .audience-media img { border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); height: 460px; object-fit: cover; width: 100%; }
        .media-float-card {
            position: absolute; left: 20px; bottom: 20px; background: rgba(255, 255, 255, .95);
            border-radius: var(--radius-md); box-shadow: var(--shadow); padding: 14px 20px;
            display: flex; align-items: center; gap: 12px; backdrop-filter: blur(10px);
        }
        .media-float-card i { color: var(--primary); font-size: 26px; }
        .media-float-card strong { display: block; font-size: 14px; color: var(--dark); }
        .media-float-card span { font-size: 12px; color: var(--text-weak); }
        .audience-content .section-tag { margin-bottom: 14px; }
        .audience-content h2 { font-size: clamp(1.4rem, 2.6vw, 2rem); font-weight: 700; color: var(--dark); line-height: 1.35; margin-bottom: 16px; }
        .audience-content > p { color: var(--text-weak); margin-bottom: 28px; }
        .audience-list { display: flex; flex-direction: column; gap: 18px; margin-bottom: 32px; }
        .audience-list li { display: flex; gap: 16px; align-items: flex-start; }
        .audience-list li i {
            width: 40px; height: 40px; border-radius: 12px; background: var(--primary-light);
            color: var(--primary); display: flex; align-items: center; justify-content: center;
            font-size: 16px; flex-shrink: 0; margin-top: 2px;
        }
        .audience-list strong { display: block; font-size: 15px; color: var(--dark); margin-bottom: 4px; }
        .audience-list p { font-size: 14px; color: var(--text-weak); line-height: 1.6; }

        .section-categories { background: var(--card); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
        .category-bento { display: grid; grid-template-columns: 1.2fr .8fr; grid-template-rows: repeat(2, 220px); gap: 20px; }
        .category-card {
            position: relative; border-radius: var(--radius-lg); overflow: hidden; display: block;
            background-size: cover; background-position: center; box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }
        .category-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
        .category-card:hover .category-content { transform: translateY(0); }
        .category-overlay {
            position: absolute; inset: 0; background: linear-gradient(180deg, rgba(10,16,35,.15) 0%, rgba(10,16,35,.35) 60%, rgba(10,16,35,.78) 100%);
            transition: var(--transition);
        }
        .category-card:hover .category-overlay { background: linear-gradient(180deg, rgba(10,16,35,.1) 0%, rgba(10,16,35,.3) 60%, rgba(10,16,35,.85) 100%); }
        .category-content { position: absolute; left: 0; right: 0; bottom: 0; padding: 28px; color: #fff; }
        .category-tag {
            display: inline-block; background: rgba(255, 255, 255, .2); backdrop-filter: blur(6px);
            padding: 4px 12px; border-radius: 20px; font-size: 12px; font-weight: 500; margin-bottom: 10px;
        }
        .category-content h3 { font-size: 24px; font-weight: 700; margin-bottom: 8px; }
        .category-content p { font-size: 14px; line-height: 1.6; opacity: .9; max-width: 90%; }
        .category-link { display: inline-flex; align-items: center; gap: 6px; font-size: 14px; font-weight: 600; margin-top: 12px; opacity: .95; }
        .category-card.main-card { grid-row: span 2; }
        .category-card.sub-card .card-bg { position: absolute; inset: 0; background-size: cover; background-position: center; }
        .category-card.sub-card .category-content h3 { font-size: 19px; }
        .category-card.sub-card .category-content p { font-size: 13px; }

        .section-steps { background: var(--dark); position: relative; overflow: hidden; }
        .section-steps::before {
            content: ''; position: absolute; top: -100px; right: -100px; width: 320px; height: 320px;
            background: radial-gradient(circle, rgba(30, 94, 255, .35) 0%, transparent 70%); border-radius: 50%;
        }
        .section-steps .section-head h2 { color: #fff; }
        .section-steps .section-desc { color: rgba(255, 255, 255, .7); }
        .section-steps .section-tag { background: rgba(255, 255, 255, .1); color: #fff; }
        .steps-grid { display: flex; align-items: center; justify-content: center; gap: 10px; flex-wrap: wrap; position: relative; }
        .step-item {
            background: rgba(255, 255, 255, .06); border: 1px solid rgba(255, 255, 255, .12);
            border-radius: var(--radius-lg); padding: 36px 30px; text-align: center; flex: 1; max-width: 300px;
            backdrop-filter: blur(8px); transition: var(--transition);
        }
        .step-item:hover { background: rgba(255, 255, 255, .12); transform: translateY(-4px); }
        .step-num { font-size: 34px; font-weight: 800; color: rgba(255, 255, 255, .2); line-height: 1; }
        .step-item i { font-size: 30px; color: var(--primary); margin: 16px 0 12px; display: block; }
        .step-item h3 { font-size: 17px; color: #fff; margin-bottom: 10px; }
        .step-item p { font-size: 13px; color: rgba(255, 255, 255, .65); line-height: 1.6; }
        .step-arrow { color: rgba(255, 255, 255, .4); font-size: 18px; padding: 0 6px; }

        .section-faq { background: var(--card); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
        .faq-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
        .faq-item { background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius-md); transition: var(--transition); }
        .faq-item:hover { border-color: rgba(30, 94, 255, .25); box-shadow: var(--shadow-sm); }
        .faq-item details summary {
            display: flex; align-items: center; justify-content: space-between; gap: 16px;
            padding: 20px 24px; font-size: 15px; font-weight: 600; color: var(--dark);
            cursor: pointer; list-style: none; user-select: none;
        }
        .faq-item details summary::-webkit-details-marker { display: none; }
        .faq-item details summary::after {
            content: '\f078'; font-family: 'Font Awesome 6 Free'; font-weight: 900; font-size: 13px;
            color: var(--primary); transition: var(--transition); flex-shrink: 0;
        }
        .faq-item details[open] summary::after { transform: rotate(180deg); }
        .faq-item details p { padding: 0 24px 22px; font-size: 14px; color: var(--text-weak); line-height: 1.75; }

        .section-cta .cta-banner {
            position: relative; border-radius: var(--radius-lg); overflow: hidden; padding: 80px 60px;
            background-size: cover; background-position: center; text-align: center; box-shadow: var(--shadow-lg);
        }
        .cta-overlay { position: absolute; inset: 0; background: linear-gradient(120deg, rgba(10, 16, 35, .88), rgba(15, 28, 63, .72)); }
        .cta-content { position: relative; z-index: 1; }
        .cta-content h2 { font-size: clamp(1.6rem, 3vw, 2.4rem); color: #fff; font-weight: 700; margin-bottom: 16px; }
        .cta-content p { color: rgba(255, 255, 255, .8); max-width: 560px; margin: 0 auto 30px; font-size: 15px; line-height: 1.7; }
        .cta-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

        .site-footer { background: #0a1226; color: rgba(255, 255, 255, .65); padding: 70px 0 30px; }
        .footer-top { display: grid; grid-template-columns: 1.4fr .8fr .8fr 1fr; gap: 40px; margin-bottom: 50px; }
        .footer-logo { font-size: 17px; font-weight: 700; color: #fff; display: block; margin-bottom: 14px; line-height: 1.4; }
        .footer-brand p { font-size: 13px; line-height: 1.7; max-width: 320px; }
        .footer-nav h4, .footer-contact h4 { color: #fff; font-size: 15px; margin-bottom: 16px; }
        .footer-nav ul { display: flex; flex-direction: column; gap: 10px; }
        .footer-nav ul li a { font-size: 14px; transition: var(--transition); }
        .footer-nav ul li a:hover { color: #fff; padding-left: 4px; }
        .footer-contact p { font-size: 14px; margin-bottom: 10px; display: flex; align-items: center; gap: 10px; }
        .footer-contact i { color: var(--primary); }
        .footer-bottom { border-top: 1px solid rgba(255, 255, 255, .08); padding-top: 24px; text-align: center; font-size: 13px; color: rgba(255, 255, 255, .45); }

        .section-news { background: var(--bg); }
        .news-wrap { display: grid; grid-template-columns: 1fr 320px; gap: 40px; align-items: start; }
        .news-list { display: flex; flex-direction: column; gap: 16px; }
        .news-item {
            display: flex; align-items: flex-start; gap: 20px; background: var(--card);
            border: 1px solid var(--border); border-radius: var(--radius-md); padding: 22px 24px;
            transition: var(--transition);
        }
        .news-item:hover { box-shadow: var(--shadow); transform: translateY(-3px); border-color: rgba(30, 94, 255, .2); }
        .news-date { font-size: 13px; color: var(--primary); font-weight: 600; padding-top: 4px; white-space: nowrap; }
        .news-body { flex: 1; min-width: 0; }
        .news-body h3 { font-size: 16px; font-weight: 600; color: var(--dark); margin-bottom: 6px; line-height: 1.4; transition: var(--transition); }
        .news-item:hover .news-body h3 { color: var(--primary); }
        .news-body p { font-size: 14px; color: var(--text-weak); line-height: 1.6; }
        .news-more { align-self: center; color: var(--text-weak); font-size: 14px; transition: var(--transition); }
        .news-item:hover .news-more { color: var(--primary); transform: translateX(4px); }

        .news-sidebar { display: flex; flex-direction: column; gap: 20px; }
        .sidebar-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 26px; box-shadow: var(--shadow-sm); }
        .sidebar-card h3 { font-size: 16px; font-weight: 600; color: var(--dark); margin-bottom: 18px; padding-bottom: 12px; border-bottom: 2px solid var(--primary-light); }
        .tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; }
        .tag-cloud a {
            display: inline-block; padding: 6px 14px; background: var(--bg); border-radius: 20px;
            font-size: 13px; color: var(--text); transition: var(--transition); border: 1px solid transparent;
        }
        .tag-cloud a:hover { background: var(--primary-light); color: var(--primary); border-color: rgba(30, 94, 255, .2); }
        .sidebar-links li { margin-bottom: 12px; }
        .sidebar-links li a { display: flex; align-items: center; gap: 10px; font-size: 14px; color: var(--text); transition: var(--transition); }
        .sidebar-links li a:hover { color: var(--primary); padding-left: 4px; }
        .sidebar-links li a i { font-size: 8px; color: var(--primary); }

        .section-join { background: var(--card); }
        .join-wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
        .join-info h2 { font-size: clamp(1.4rem, 2.6vw, 2rem); font-weight: 700; color: var(--dark); margin-bottom: 16px; line-height: 1.35; }
        .join-info > p { color: var(--text-weak); margin-bottom: 24px; }
        .join-info ul { display: flex; flex-direction: column; gap: 16px; margin-bottom: 28px; }
        .join-info ul li { display: flex; align-items: center; gap: 12px; font-size: 14px; color: var(--text); }
        .join-info ul li i { color: var(--primary); font-size: 18px; width: 22px; text-align: center; }
        .join-contact { background: var(--bg); border-radius: var(--radius-md); padding: 16px 22px; display: flex; align-items: center; gap: 18px; flex-wrap: wrap; }
        .join-contact span { font-size: 14px; color: var(--text-weak); }
        .join-contact a { font-weight: 600; color: var(--primary); font-size: 16px; display: inline-flex; align-items: center; gap: 8px; }
        .join-form-card { background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 36px; box-shadow: var(--shadow); }
        .form-row { margin-bottom: 18px; }
        .form-row label { display: block; font-size: 14px; font-weight: 500; color: var(--dark); margin-bottom: 6px; }
        .form-row input, .form-row select, .form-row textarea {
            width: 100%; padding: 13px 16px; border: 1px solid var(--border); border-radius: var(--radius-sm);
            background: #fff; transition: var(--transition); font-size: 14px; color: var(--text);
        }
        .form-row input:focus, .form-row select:focus, .form-row textarea:focus {
            outline: none; border-color: var(--primary); box-shadow: 0 0 0 4px rgba(30, 94, 255, .1);
        }
        .form-row textarea { resize: vertical; min-height: 80px; }

        @media (max-width: 1024px) {
            .benefit-grid { grid-template-columns: repeat(2, 1fr); }
            .hero-inner { grid-template-columns: 1fr; gap: 40px; }
            .hero { padding: 140px 0 60px; }
            .demo-panel { max-width: 560px; }
            .audience-wrap { grid-template-columns: 1fr; gap: 40px; }
            .category-bento { grid-template-columns: 1fr 1fr; }
            .category-card.main-card { grid-row: span 1; }
            .news-wrap { grid-template-columns: 1fr; }
            .join-wrap { grid-template-columns: 1fr; gap: 40px; }
            .faq-grid { grid-template-columns: 1fr; }
            .footer-top { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 768px) {
            .section { padding: 60px 0; }
            .steps-grid { flex-direction: column; }
            .step-arrow { transform: rotate(90deg); }
            .step-item { max-width: 100%; width: 100%; }
            .category-bento { grid-template-columns: 1fr; }
            .footer-top { grid-template-columns: 1fr; gap: 30px; }
            .hero-stats { gap: 20px; }
        }
        @media (max-width: 520px) {
            .navbar { height: 62px; }
            .nav-menu {
                position: fixed; top: 62px; left: 0; right: 0; background: rgba(255, 255, 255, .98);
                backdrop-filter: blur(20px); flex-direction: column; padding: 20px 16px;
                border-bottom: 1px solid var(--border); box-shadow: var(--shadow);
                display: none; gap: 4px;
            }
            .nav-menu.open { display: flex; }
            .nav-link { font-size: 16px; padding: 12px 16px; }
            .nav-cta { display: none; }
            .nav-toggle { display: flex; }
            .hero { min-height: auto; padding: 110px 0 50px; }
            .hero h1 { font-size: 1.45rem; }
            .hero-actions .btn { width: 100%; }
            .stat-item strong { font-size: 22px; }
            .benefit-grid { grid-template-columns: 1fr; }
            .audience-media img { height: 300px; }
            .category-bento { grid-template-columns: 1fr; grid-template-rows: auto; }
            .category-card { min-height: 200px; }
            .section-cta .cta-banner { padding: 50px 24px; }
            .join-form-card { padding: 24px; }
            .news-item { flex-direction: column; gap: 10px; }
            .news-more { display: none; }
            .demo-tabs { flex-wrap: wrap; }
            .demo-item { flex-wrap: wrap; }
            .demo-thumb { width: 50px; height: 50px; }
        }

:root {
  --primary: #1e5eff;
  --primary-dark: #1648c4;
  --primary-light: #eaf0ff;
  --accent: #f5a623;
  --dark: #0f1c3f;
  --bg: #f5f7fb;
  --card: #ffffff;
  --text: #16203a;
  --text-weak: #6d7a92;
  --border: #e4e9f2;
  --radius-lg: 18px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --shadow-sm: 0 4px 16px rgba(15, 28, 63, 0.06);
  --shadow: 0 10px 32px rgba(15, 28, 63, 0.08);
  --shadow-lg: 0 20px 48px rgba(15, 28, 63, 0.14);
  --transition: all .3s ease;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, select, textarea { font-family: inherit; font-size: 14px; color: var(--text); }
.container { width: min(1200px, 92%); margin: 0 auto; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 28px; border-radius: 50px; font-size: 15px; font-weight: 600;
  line-height: 1.2; border: 2px solid transparent; transition: var(--transition);
  cursor: pointer; white-space: nowrap;
}
.btn-primary { background: var(--primary); color: #fff; box-shadow: 0 8px 24px rgba(30, 94, 255, .3); }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 12px 30px rgba(30, 94, 255, .4); }
.btn-primary:active { transform: translateY(0); box-shadow: 0 4px 12px rgba(30, 94, 255, .25); }
.btn-primary:focus-visible { outline: 3px solid rgba(30, 94, 255, .35); outline-offset: 2px; }
.btn-outline { border-color: rgba(255, 255, 255, .75); color: #fff; background: transparent; }
.btn-outline:hover { background: rgba(255, 255, 255, .12); border-color: #fff; transform: translateY(-2px); }
.btn-outline:active { transform: translateY(0); }
.btn-outline:focus-visible { outline: 3px solid rgba(255, 255, 255, .35); outline-offset: 2px; }
.btn-outline-dark { border-color: var(--dark); color: var(--dark); background: transparent; }
.btn-outline-dark:hover { background: var(--dark); color: #fff; transform: translateY(-2px); }
.btn-outline-dark:focus-visible { outline: 3px solid rgba(15, 28, 63, .2); outline-offset: 2px; }
.btn-lg { padding: 15px 36px; font-size: 16px; }
.btn-sm { padding: 8px 18px; font-size: 14px; border-radius: 30px; }
.btn-light { background: #fff; color: var(--dark); box-shadow: 0 4px 14px rgba(0, 0, 0, .08); }
.btn-light:hover { background: var(--primary-light); transform: translateY(-2px); }
.btn-light:focus-visible { outline: 3px solid rgba(30, 94, 255, .2); outline-offset: 2px; }

.section { padding: 90px 0; }
.section-head { max-width: 720px; margin: 0 auto 55px; text-align: center; }
.section-tag {
  display: inline-block; background: var(--primary-light); color: var(--primary);
  font-size: 13px; font-weight: 600; padding: 6px 16px; border-radius: 30px;
  letter-spacing: .5px; margin-bottom: 14px;
}
.section-head h2 { font-size: clamp(1.5rem, 3vw, 2.2rem); font-weight: 700; line-height: 1.3; margin-bottom: 14px; color: var(--dark); }
.section-desc { color: var(--text-weak); font-size: 15px; line-height: 1.7; }

.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(255, 255, 255, .72);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, .35);
  transition: var(--transition);
}
.site-header.scrolled { background: rgba(255, 255, 255, .96); box-shadow: var(--shadow-sm); }
.navbar { display: flex; align-items: center; justify-content: space-between; height: 72px; gap: 20px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; color: var(--dark); }
.brand-icon {
  width: 38px; height: 38px; border-radius: 10px; background: linear-gradient(135deg, var(--primary), #0f1c3f);
  display: flex; align-items: center; justify-content: center; color: #fff; font-size: 16px;
}
.nav-menu { display: flex; align-items: center; gap: 6px; list-style: none; }
.nav-link {
  display: block; padding: 10px 18px; border-radius: 30px; font-size: 15px; font-weight: 500;
  color: var(--text); transition: var(--transition); position: relative;
}
.nav-link:hover { color: var(--primary); background: var(--primary-light); }
.nav-link.active { color: var(--primary); background: var(--primary-light); font-weight: 600; }
.nav-link:focus-visible { outline: 3px solid rgba(30, 94, 255, .25); outline-offset: 2px; }
.nav-cta { margin-left: 8px; }
.nav-toggle { display: none; flex-direction: column; gap: 5px; padding: 10px; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--dark); border-radius: 2px; transition: var(--transition); }
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.hero {
  position: relative; min-height: 88vh; display: flex; align-items: center;
  padding: 150px 0 90px; overflow: hidden;
}
.hero-bg {
  position: absolute; inset: 0; background-size: cover; background-position: center; z-index: -2;
}
.hero-overlay {
  position: absolute; inset: 0; z-index: -1;
  background: linear-gradient(105deg, rgba(10, 16, 35, .94) 0%, rgba(10, 16, 35, .8) 50%, rgba(10, 16, 35, .45) 100%);
}
.hero-inner { display: grid; grid-template-columns: 1.05fr .95fr; gap: 60px; align-items: center; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px; background: rgba(255, 255, 255, .12);
  color: #fff; font-size: 13px; font-weight: 500; padding: 7px 16px; border-radius: 30px;
  border: 1px solid rgba(255, 255, 255, .18);
}
.hero-badge i { color: var(--accent); }
.hero h1 {
  font-size: clamp(2rem, 4.2vw, 3.2rem); font-weight: 800; line-height: 1.2;
  color: #fff; margin: 24px 0 18px;
}
.hero h1 span { color: var(--accent); }
.hero-sub {
  color: rgba(255, 255, 255, .82); font-size: 16px; line-height: 1.75;
  max-width: 540px; margin-bottom: 34px;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 16px; margin-bottom: 40px; }
.hero-trust {
  display: flex; flex-wrap: wrap; gap: 22px;
  color: rgba(255, 255, 255, .7); font-size: 13px; font-weight: 400;
}
.hero-trust span { display: flex; align-items: center; gap: 6px; }
.hero-trust i { color: var(--accent); font-size: 14px; }
.hero-visual { position: relative; }
.hero-card {
  background: rgba(255, 255, 255, .1); border: 1px solid rgba(255, 255, 255, .18);
  border-radius: var(--radius-lg); backdrop-filter: blur(10px);
  padding: 28px; color: #fff; box-shadow: var(--shadow-lg);
}
.hero-card-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 18px; }
.hero-card-header h4 { font-size: 16px; font-weight: 600; }
.hero-card-badge {
  background: var(--accent); color: #0f1c3f; font-size: 12px; font-weight: 700;
  padding: 4px 12px; border-radius: 20px;
}
.hero-card-list { list-style: none; }
.hero-card-list li {
  display: flex; align-items: center; gap: 12px;
  padding: 11px 0; border-bottom: 1px solid rgba(255, 255, 255, .1);
  font-size: 14px;
}
.hero-card-list li:last-child { border-bottom: none; }
.hero-card-list i { color: var(--accent); width: 18px; text-align: center; }
.hero-card-list .time { margin-left: auto; color: rgba(255, 255, 255, .5); font-size: 12px; }

.grid-categories {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
}
.cate-card {
  background: var(--card); border-radius: var(--radius-lg); padding: 32px 26px;
  box-shadow: var(--shadow-sm); border: 1px solid var(--border);
  transition: var(--transition); text-align: left;
}
.cate-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); border-color: rgba(30, 94, 255, .35); }
.cate-icon {
  width: 56px; height: 56px; border-radius: 14px;
  background: var(--primary-light); color: var(--primary);
  display: flex; align-items: center; justify-content: center;
  font-size: 22px; margin-bottom: 20px; transition: var(--transition);
}
.cate-card:hover .cate-icon { background: var(--primary); color: #fff; }
.cate-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 8px; color: var(--dark); }
.cate-card p { font-size: 14px; color: var(--text-weak); line-height: 1.65; }
.cate-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 14px; }
.tag {
  font-size: 12px; background: var(--bg); color: var(--text-weak);
  padding: 3px 10px; border-radius: 20px; font-weight: 500;
}

.stats-section {
  background: var(--dark); background-image: url('/assets/images/backpic/back-3.jpg');
  background-size: cover; background-position: center; background-blend-mode: multiply;
  padding: 90px 0; position: relative;
}
.stats-section::before {
  content: ''; position: absolute; inset: 0;
  background: rgba(15, 28, 63, .88);
}
.stats-inner { position: relative; z-index: 1; text-align: center; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 40px; }
.stat-item {}
.stat-num {
  font-size: clamp(2rem, 4vw, 3.2rem); font-weight: 800; color: #fff; line-height: 1.1;
}
.stat-num i { color: var(--accent); font-size: .5em; font-style: normal; margin-right: 4px; }
.stat-label { color: rgba(255, 255, 255, .7); font-size: 14px; margin-top: 8px; letter-spacing: .5px; }

.testimonial-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}
.testimonial-card {
  background: var(--card); border-radius: var(--radius-lg); padding: 30px;
  box-shadow: var(--shadow-sm); border: 1px solid var(--border);
  transition: var(--transition); display: flex; flex-direction: column; gap: 16px;
}
.testimonial-card:hover { box-shadow: var(--shadow); transform: translateY(-4px); }
.testimonial-stars { color: var(--accent); font-size: 14px; letter-spacing: 2px; }
.testimonial-text { font-size: 14px; color: var(--text); line-height: 1.75; }
.testimonial-author {
  display: flex; align-items: center; gap: 12px;
  border-top: 1px solid var(--border); padding-top: 16px;
}
.testimonial-avatar {
  width: 42px; height: 42px; border-radius: 50%;
  background: var(--primary-light); color: var(--primary);
  display: flex; align-items: center; justify-content: center; font-size: 16px; font-weight: 700;
}
.testimonial-author-info .name { font-size: 14px; font-weight: 600; color: var(--dark); }
.testimonial-author-info .scene { font-size: 12px; color: var(--text-weak); }

.route-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px;
}
.route-card {
  background: var(--card); border-radius: var(--radius-lg); overflow: hidden;
  box-shadow: var(--shadow-sm); border: 1px solid var(--border);
  transition: var(--transition); display: flex; flex-direction: column;
}
.route-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-6px); }
.route-image { position: relative; height: 180px; overflow: hidden; }
.route-image img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.route-card:hover .route-image img { transform: scale(1.06); }
.route-image::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(0,0,0,0) 50%, rgba(10,16,35,.55) 100%);
}
.route-label {
  position: absolute; top: 16px; left: 16px; z-index: 2;
  background: rgba(255,255,255,.92); color: var(--dark);
  font-size: 12px; font-weight: 700; padding: 5px 14px; border-radius: 20px;
}
.route-body { padding: 24px; flex: 1; display: flex; flex-direction: column; }
.route-body h3 { font-size: 18px; font-weight: 700; color: var(--dark); margin-bottom: 12px; }
.route-steps { list-style: none; margin-bottom: 16px; flex: 1; }
.route-steps li {
  display: flex; align-items: flex-start; gap: 10px;
  font-size: 14px; color: var(--text); padding: 5px 0;
}
.route-steps li i { color: var(--primary); margin-top: 4px; width: 16px; text-align: center; }
.route-meta {
  display: flex; justify-content: space-between; align-items: center;
  border-top: 1px solid var(--border); padding-top: 14px;
}
.route-price { font-size: 14px; font-weight: 700; color: var(--primary); }
.route-price span { font-size: 12px; font-weight: 400; color: var(--text-weak); margin-right: 4px; }
.route-link { font-size: 13px; font-weight: 600; color: var(--primary); }

.faq-section { background: var(--bg); }
.faq-list { max-width: 820px; margin: 0 auto; display: flex; flex-direction: column; gap: 14px; }
.faq-item {
  background: var(--card); border-radius: var(--radius-md);
  border: 1px solid var(--border); box-shadow: var(--shadow-sm);
  transition: var(--transition); overflow: hidden;
}
.faq-item:hover { border-color: rgba(30, 94, 255, .3); }
.faq-question {
  width: 100%; display: flex; justify-content: space-between; align-items: center;
  padding: 20px 26px; font-size: 15px; font-weight: 600; color: var(--dark);
  text-align: left; background: none; border: none; cursor: pointer; transition: var(--transition);
}
.faq-question:hover { color: var(--primary); }
.faq-question:focus-visible { outline: 3px solid rgba(30, 94, 255, .25); outline-offset: 2px; border-radius: var(--radius-md); }
.faq-icon {
  width: 30px; height: 30px; border-radius: 50%; background: var(--primary-light);
  display: flex; align-items: center; justify-content: center;
  font-size: 14px; color: var(--primary); transition: var(--transition); flex-shrink: 0;
}
.faq-item.open .faq-icon { background: var(--primary); color: #fff; }
.faq-icon i { transition: transform .3s ease; }
.faq-item.open .faq-icon i { transform: rotate(45deg); }
.faq-answer {
  max-height: 0; overflow: hidden; transition: max-height .35s ease;
}
.faq-item.open .faq-answer { max-height: 300px; }
.faq-answer-inner { padding: 0 26px 22px; font-size: 14px; color: var(--text-weak); line-height: 1.75; }

.cta-section {
  padding: 90px 0;
  background: var(--primary-light);
}
.cta-box {
  background: linear-gradient(135deg, var(--dark) 0%, #153a8a 100%);
  border-radius: calc(var(--radius-lg) + 8px);
  padding: 64px 56px; display: flex; flex-direction: column; align-items: center;
  text-align: center; color: #fff; position: relative; overflow: hidden;
}
.cta-box::before {
  content: ''; position: absolute; top: -60px; right: -60px; width: 220px; height: 220px;
  border-radius: 50%; background: rgba(255,255,255,.06);
}
.cta-box::after {
  content: ''; position: absolute; bottom: -40px; left: -40px; width: 140px; height: 140px;
  border-radius: 50%; background: rgba(245,166,35,.12);
}
.cta-box h2 { font-size: clamp(1.5rem, 3vw, 2.2rem); font-weight: 700; margin-bottom: 12px; }
.cta-box p { color: rgba(255, 255, 255, .75); font-size: 15px; margin-bottom: 32px; max-width: 480px; }
.cta-actions { display: flex; flex-wrap: wrap; gap: 16px; justify-content: center; position: relative; z-index: 1; }
.cta-note {
  margin-top: 22px; font-size: 13px; color: rgba(255,255,255,.5); position: relative; z-index: 1;
}

.site-footer { background: var(--dark); color: rgba(255,255,255,.72); padding: 60px 0 0; }
.footer-top {
  display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 40px;
  padding-bottom: 44px; border-bottom: 1px solid rgba(255,255,255,.1);
}
.footer-logo {
  font-size: 18px; font-weight: 700; color: #fff; display: flex; align-items: center; gap: 10px; margin-bottom: 14px;
}
.footer-brand p { font-size: 13px; line-height: 1.75; opacity: .6; }
.footer-nav h4 { color: #fff; font-size: 15px; font-weight: 600; margin-bottom: 18px; }
.footer-nav ul { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.footer-nav a { font-size: 14px; opacity: .7; transition: var(--transition); }
.footer-nav a:hover { opacity: 1; color: var(--accent); }
.footer-contact p { font-size: 14px; margin-bottom: 10px; display: flex; align-items: center; gap: 10px; }
.footer-contact i { color: var(--accent); width: 16px; text-align: center; }
.footer-bottom {
  text-align: center; padding: 24px 0; font-size: 13px; opacity: .5;
  border-top: 1px solid rgba(255,255,255,.06);
}
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .hero { padding: 120px 0 70px; }
  .grid-categories { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 36px; }
  .route-grid { grid-template-columns: repeat(2, 1fr); }
  .testimonial-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-top { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .section { padding: 64px 0; }
  .nav-menu {
    position: fixed; top: 72px; right: 0; width: 240px; height: auto;
    background: rgba(255,255,255,.98); backdrop-filter: blur(20px);
    border-radius: 0 0 0 18px; box-shadow: var(--shadow-lg);
    flex-direction: column; align-items: stretch; padding: 20px;
    transform: translateX(100%); transition: transform .3s ease; border-left: 1px solid var(--border);
  }
  .nav-menu.open { transform: translateX(0); }
  .nav-link { text-align: left; padding: 12px 16px; }
  .nav-link.active { background: var(--primary-light); }
  .nav-cta { display: none; }
  .nav-toggle { display: flex; }
  .hero-inner { grid-template-columns: 1fr; }
  .hero-card { margin-top: 20px; }
  .hero-trust { gap: 12px; flex-direction: column; }
  .grid-categories { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .testimonial-grid { grid-template-columns: 1fr; }
  .route-grid { grid-template-columns: 1fr; }
  .route-image { height: 160px; }
  .cta-box { padding: 44px 24px; }
  .cta-actions { flex-direction: column; width: 100%; }
  .cta-actions .btn { width: 100%; }
  .footer-top { grid-template-columns: 1fr; gap: 28px; }
}
@media (max-width: 520px) {
  .hero h1 { font-size: 1.7rem; }
  .hero-sub { font-size: 15px; }
  .btn-lg { padding: 13px 26px; font-size: 15px; }
  .stats-grid { grid-template-columns: 1fr; }
  .brand { font-size: 15px; }
  .brand-icon { width: 32px; height: 32px; font-size: 14px; }
  .section-head { margin-bottom: 36px; }
}