:root{
      --bg:#f5f7fb;
      --bg2:#eef5ff;
      --card:#ffffff;
      --line:rgba(16,24,40,.10);
      --text:#102033;
      --muted:#5b6b7f;
      --primary:#2f6bff;
      --primary2:#7c4dff;
      --accent:#00b7c7;
      --warm:#ff9f43;
      --shadow:0 18px 50px rgba(16,24,40,.08);
      --shadow2:0 10px 28px rgba(47,107,255,.16);
      --radius:20px;
      --radius2:14px;
      --container:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(47,107,255,.10), transparent 32%),
        radial-gradient(circle at top right, rgba(0,183,199,.12), transparent 28%),
        linear-gradient(180deg, #f9fbff 0%, #f5f7fb 38%, #f8fafc 100%);
      overflow-x:hidden;
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{max-width:var(--container);margin:0 auto;padding:0 20px}
    .site-header{
      position:sticky;top:0;z-index:60;
      backdrop-filter:blur(18px);
      background:rgba(249,251,255,.78);
      border-bottom:1px solid rgba(16,24,40,.08);
    }
    .header-inner{
      min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:18px;
    }
    .brand{display:flex;align-items:center;gap:12px;min-width:0}
    .brand .ai-page-logo{width:42px;height:42px;object-fit:contain;border-radius:12px;background:#fff;box-shadow:0 8px 18px rgba(16,24,40,.08)}
    .brand-text{min-width:0}
    .brand-text strong{display:block;font-size:18px;letter-spacing:.4px}
    .brand-text span{display:block;font-size:12px;color:var(--muted);margin-top:2px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
    .nav{display:flex;align-items:center;gap:8px;flex-wrap:wrap;justify-content:flex-end}
    .nav a{
      font-size:13px;color:var(--text);padding:10px 12px;border-radius:999px;transition:.25s ease;background:transparent;
    }
    .nav a:hover,.nav a.active{background:rgba(47,107,255,.10);color:var(--primary)}
    .header-actions{display:flex;align-items:center;gap:10px}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      border:0;border-radius:999px;padding:12px 18px;font-weight:700;cursor:pointer;
      transition:.25s ease;box-shadow:none;white-space:nowrap;
    }
    .btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary2));color:#fff;box-shadow:var(--shadow2)}
    .btn-primary:hover{transform:translateY(-1px);box-shadow:0 16px 30px rgba(47,107,255,.24)}
    .btn-ghost{background:#fff;color:var(--text);border:1px solid rgba(16,24,40,.10)}
    .btn-ghost:hover{transform:translateY(-1px);border-color:rgba(47,107,255,.25)}
    .menu-btn{display:none;background:#fff;border:1px solid rgba(16,24,40,.10);width:44px;height:44px;border-radius:14px}
    .menu-btn span{display:block;width:18px;height:2px;background:#223;position:relative;margin:0 auto}
    .menu-btn span:before,.menu-btn span:after{content:"";position:absolute;left:0;width:18px;height:2px;background:#223}
    .menu-btn span:before{top:-6px}.menu-btn span:after{top:6px}
    .hero{padding:34px 0 24px;position:relative}
    .hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:24px;align-items:stretch}
    .hero-copy,.hero-panel,.section-card,.feature-card,.stat-card,.review-card,.case-card,.info-card,.faq-item,.blog-card,.compare-wrap,.form-card,.network-card,.timeline-card,.price-card{
      background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)
    }
    .hero-copy{padding:28px;position:relative;overflow:hidden}
    .hero-copy:before{
      content:"";position:absolute;inset:auto -18% -24% auto;width:240px;height:240px;border-radius:50%;
      background:radial-gradient(circle, rgba(47,107,255,.14), rgba(47,107,255,0) 65%);
    }
    .eyebrow{
      display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;
      background:rgba(47,107,255,.10);color:var(--primary);font-size:13px;font-weight:700
    }
    h1{margin:16px 0 14px;font-size:clamp(30px,4.1vw,52px);line-height:1.1;letter-spacing:-.02em}
    .lead{font-size:16px;line-height:1.85;color:var(--muted);margin:0 0 18px;max-width:62ch}
    .hero-points{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:22px 0}
    .point{
      background:linear-gradient(180deg,#fff, #f8fbff);border:1px solid rgba(47,107,255,.10);
      border-radius:16px;padding:14px;min-height:92px
    }
    .point strong{display:block;font-size:14px;margin-bottom:6px}
    .point span{display:block;color:var(--muted);font-size:13px;line-height:1.7}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center;margin-top:18px}
    .hero-note{margin-top:14px;color:var(--muted);font-size:13px;line-height:1.7}
    .hero-panel{padding:22px;display:flex;flex-direction:column;gap:14px;justify-content:space-between}
    .panel-top{display:flex;align-items:flex-start;justify-content:space-between;gap:14px}
    .score{
      text-align:right;padding:12px 14px;border-radius:16px;background:linear-gradient(135deg, rgba(47,107,255,.10), rgba(0,183,199,.08));
      border:1px solid rgba(47,107,255,.12)
    }
    .score strong{display:block;font-size:26px}
    .score span{font-size:12px;color:var(--muted)}
    .hero-metrics{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
    .metric{padding:16px;border-radius:16px;background:#fff;border:1px solid rgba(16,24,40,.08)}
    .metric b{display:block;font-size:18px;margin-bottom:6px}
    .metric p{margin:0;color:var(--muted);font-size:13px;line-height:1.6}
    .section{padding:16px 0 28px}
    .section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:16px}
    .section-head h2{margin:0;font-size:28px}
    .section-head p{margin:0;color:var(--muted);max-width:62ch;line-height:1.7}
    .section-card{padding:24px}
    .grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
    .grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
    .stat-card,.feature-card,.review-card,.case-card,.blog-card,.info-card,.network-card,.timeline-card,.price-card{padding:20px}
    .stat-card .k{font-size:30px;font-weight:800;color:var(--primary);line-height:1}
    .stat-card .t{margin-top:10px;font-weight:700}
    .stat-card .d{margin-top:8px;color:var(--muted);font-size:13px;line-height:1.7}
    .feature-card h3,.case-card h3,.review-card h3,.blog-card h3,.info-card h3,.network-card h3,.price-card h3,.timeline-card h3{margin:0 0 10px;font-size:18px}
    .feature-card p,.case-card p,.review-card p,.blog-card p,.info-card p,.network-card p,.price-card p,.timeline-card p{margin:0;color:var(--muted);line-height:1.75;font-size:14px}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag{padding:9px 12px;border-radius:999px;background:rgba(47,107,255,.08);border:1px solid rgba(47,107,255,.12);font-size:13px}
    .flow{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
    .flow-step{position:relative;padding:18px;border-radius:18px;background:linear-gradient(180deg,#fff,#f8fbff);border:1px solid rgba(16,24,40,.08)}
    .flow-step .num{display:inline-flex;width:34px;height:34px;align-items:center;justify-content:center;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;font-weight:800;margin-bottom:10px}
    .table-wrap{overflow-x:auto;border-radius:18px;border:1px solid rgba(16,24,40,.08)}
    table{width:100%;border-collapse:collapse;min-width:780px;background:#fff}
    th,td{padding:14px 16px;border-bottom:1px solid rgba(16,24,40,.08);text-align:left;font-size:14px;vertical-align:top}
    th{background:#f7faff;color:#314256}
    tr:last-child td{border-bottom:0}
    .rating{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
    .stars{color:#ffb400;font-size:18px;letter-spacing:2px}
    .faq-list{display:grid;gap:12px}
    .faq-item{overflow:hidden}
    .faq-q{
      width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
      background:transparent;border:0;padding:18px 20px;font-size:15px;font-weight:700;color:var(--text);cursor:pointer;text-align:left
    }
    .faq-q span{display:block}
    .faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease,padding .28s ease;color:var(--muted);padding:0 20px}
    .faq-item.open .faq-a{max-height:180px;padding:0 20px 18px;line-height:1.75}
    .faq-symbol{font-size:20px;color:var(--primary);transition:transform .25s ease}
    .faq-item.open .faq-symbol{transform:rotate(45deg)}
    .review-meta{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:10px}
    .review-role{font-size:13px;color:var(--primary);font-weight:700}
    .review-stars{color:#ffb400;letter-spacing:2px}
    .blog-list{display:grid;gap:14px}
    .blog-card{display:flex;flex-direction:column;gap:10px}
    .blog-card .meta{font-size:12px;color:var(--muted)}
    .form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
    .field{display:flex;flex-direction:column;gap:8px}
    .field label{font-size:13px;font-weight:700;color:#223}
    .field input,.field select,.field textarea{
      width:100%;border-radius:14px;border:1px solid rgba(16,24,40,.12);background:#fff;padding:13px 14px;
      color:var(--text);font-size:14px;outline:none;transition:.2s ease;
    }
    .field input:focus,.field select:focus,.field textarea:focus{border-color:rgba(47,107,255,.5);box-shadow:0 0 0 4px rgba(47,107,255,.08)}
    .field textarea{min-height:120px;resize:vertical}
    .form-actions{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-top:4px}
    .note{font-size:13px;color:var(--muted);line-height:1.7}
    .contact-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:16px}
    .qrcode-box{display:flex;gap:16px;align-items:center;flex-wrap:wrap}
    .qrcode-box img{width:150px;max-width:100%;border-radius:18px;border:1px solid rgba(16,24,40,.08);background:#fff;padding:8px}
    .footer{
      margin-top:12px;padding:24px 0 28px;border-top:1px solid rgba(16,24,40,.08);
      background:linear-gradient(180deg, rgba(255,255,255,.82), rgba(241,246,255,.92));
      color:#1b2736;
    }
    .footer a{color:#1f55d5}
    .footer-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:16px}
    .footer small,.footer p{color:#516173;line-height:1.8}
    .link-row{display:flex;flex-wrap:wrap;gap:10px}
    .link-row a{padding:8px 11px;border-radius:999px;background:#fff;border:1px solid rgba(16,24,40,.10)}
    .floating{
      position:fixed;right:16px;bottom:16px;z-index:70;display:flex;flex-direction:column;gap:10px
    }
    .float-btn{
      width:52px;height:52px;border-radius:18px;background:linear-gradient(135deg,var(--primary),var(--primary2));
      color:#fff;display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow2);font-weight:800
    }
    .float-contact{
      position:fixed;left:16px;bottom:16px;z-index:70;background:#fff;border:1px solid rgba(16,24,40,.10);
      border-radius:18px;padding:12px 14px;box-shadow:var(--shadow);max-width:calc(100vw - 32px)
    }
    .float-contact strong{display:block;font-size:14px;margin-bottom:4px}
    .float-contact span{display:block;font-size:12px;color:var(--muted)}
    .mobile-only{display:none}
    .anchor-pad{scroll-margin-top:96px}
    .mini-list{margin:0;padding-left:18px;color:var(--muted);line-height:1.8}
    .rating-card{
      display:grid;grid-template-columns:auto 1fr;gap:16px;align-items:center;
      background:linear-gradient(135deg, rgba(47,107,255,.09), rgba(0,183,199,.08));border-radius:18px;padding:18px;border:1px solid rgba(47,107,255,.10)
    }
    .rating-score{font-size:36px;font-weight:900;color:var(--primary);line-height:1}
    .timeline{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:14px}
    .timeline-card{position:relative}
    .timeline-card:before{
      content:"";position:absolute;left:18px;top:18px;width:10px;height:10px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--accent))
    }
    .timeline-card{padding-left:34px}
    .table-cards{display:none}
    .case-strip{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
    .case-figure{
      border-radius:18px;overflow:hidden;border:1px solid rgba(16,24,40,.08);background:#fff
    }
    .case-figure img{width:100%;height:auto}
    .muted-link{color:var(--primary);font-weight:700}
    .topbar{padding:8px 0;background:linear-gradient(90deg,rgba(47,107,255,.10),rgba(0,183,199,.08))}
    .topbar .container{display:flex;justify-content:space-between;gap:12px;align-items:center;font-size:13px;color:#314256}
    .topbar strong{color:#143a8a}
    .scroll-appear{opacity:0;transform:translateY(18px);transition:opacity .5s ease,transform .5s ease}
    .scroll-appear.show{opacity:1;transform:translateY(0)}
    .service-net{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .icon-badge{
      width:42px;height:42px;border-radius:14px;display:flex;align-items:center;justify-content:center;
      background:linear-gradient(135deg,rgba(47,107,255,.14),rgba(124,77,255,.14));color:var(--primary);font-weight:900;margin-bottom:12px
    }
    @media (max-width: 1100px){
      .hero-grid,.contact-grid,.footer-grid,.service-net,.case-strip,.grid-4,.grid-3,.grid-2,.flow,.timeline{grid-template-columns:repeat(2,minmax(0,1fr))}
    }
    @media (max-width: 900px){
      .nav{display:none}
      .menu-btn{display:inline-flex;align-items:center;justify-content:center}
      .header-actions .btn-ghost{display:none}
      .mobile-only{display:block}
      .nav.open{
        display:flex;position:absolute;left:20px;right:20px;top:84px;padding:14px;background:#fff;border:1px solid rgba(16,24,40,.10);
        border-radius:18px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch;z-index:80
      }
      .nav.open a{padding:12px 14px;border-radius:12px;background:#f8fbff}
      .hero-grid,.contact-grid,.footer-grid,.service-net,.case-strip,.grid-4,.grid-3,.grid-2,.flow,.timeline{grid-template-columns:1fr}
      .hero-points,.hero-metrics,.form-grid{grid-template-columns:1fr}
      .section-head{flex-direction:column;align-items:flex-start}
      .table-wrap{display:none}
      .table-cards{display:grid;gap:12px}
      .compare-mobile{padding:18px;border-radius:18px;border:1px solid rgba(16,24,40,.08);background:#fff}
      .compare-mobile strong{display:block;margin-bottom:8px}
    }
    @media (max-width: 640px){
      .container{padding:0 16px}
      .hero-copy,.hero-panel,.section-card{padding:18px}
      .brand-text span{display:none}
      h1{font-size:30px}
      .lead{font-size:15px}
      .float-contact{display:none}
    }