:root{
      --bg:#f5f8fb;
      --panel:#ffffff;
      --soft:#eef6fb;
      --line:#d9e6ef;
      --text:#163041;
      --muted:#5f7384;
      --brand:#0f8ea6;
      --brand2:#22c3b6;
      --accent:#2a6ff2;
      --shadow:0 18px 40px rgba(15, 37, 54, .08);
      --radius:20px;
      --max:1200px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(34,195,182,.12), transparent 28%),
        radial-gradient(circle at top right, rgba(42,111,242,.10), transparent 24%),
        linear-gradient(180deg, #f8fcff 0%, #f5f8fb 42%, #eff5f8 100%);
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(var(--max), calc(100% - 32px)); margin:0 auto}
    header,main,footer{width:100%}
    .topbar{
      position:sticky;top:0;z-index:50;
      backdrop-filter:saturate(160%) blur(14px);
      background:rgba(248,252,255,.84);
      border-bottom:1px solid rgba(217,230,239,.75);
    }
    .nav{
      display:flex;align-items:center;justify-content:space-between;gap:16px;
      min-height:76px;padding:12px 0;
    }
    .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;padding:4px;box-shadow:0 8px 24px rgba(15,37,54,.08)}
    .brand strong{display:block;font-size:1.02rem;letter-spacing:.02em}
    .brand span{display:block;font-size:.82rem;color:var(--muted)}
    .menu-btn{
      display:none;border:1px solid var(--line);background:#fff;color:var(--text);
      border-radius:12px;padding:10px 12px;font-size:14px;
    }
    .nav-links{display:flex;align-items:center;gap:14px;flex-wrap:wrap;justify-content:flex-end}
    .nav-links a{font-size:14px;color:var(--muted);padding:10px 0;position:relative}
    .nav-links a::after{
      content:"";position:absolute;left:0;bottom:3px;width:0;height:2px;border-radius:2px;background:linear-gradient(90deg,var(--brand),var(--brand2));
      transition:.25s ease;
    }
    .nav-links a:hover{color:var(--text)}
    .nav-links a:hover::after{width:100%}
    .hero{
      padding:34px 0 20px;
    }
    .hero-grid{
      display:grid;grid-template-columns:1.15fr .85fr;gap:22px;align-items:stretch;
    }
    .hero-main,.hero-side,.panel,.card,.faq-item,.review,.article,.pricebox,.timeline-item,.quote{
      background:rgba(255,255,255,.86);
      border:1px solid rgba(217,230,239,.9);
      box-shadow:var(--shadow);
      border-radius:var(--radius);
    }
    .hero-main{padding:34px}
    .kicker{
      display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;
      background:linear-gradient(135deg, rgba(15,142,166,.12), rgba(42,111,242,.10));color:#0e6678;font-weight:600;font-size:13px;
    }
    h1{margin:18px 0 14px;font-size:clamp(2rem, 4vw, 3.4rem);line-height:1.08;letter-spacing:-.03em}
    .lead{margin:0;color:var(--muted);font-size:1.05rem;line-height:1.8;max-width:58ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:10px;border-radius:14px;
      padding:13px 18px;border:1px solid transparent;font-weight:700;transition:.25s ease;
      transform:translateY(0);
    }
    .btn.primary{background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;box-shadow:0 14px 28px rgba(15,142,166,.22)}
    .btn.secondary{background:#fff;color:var(--text);border-color:var(--line)}
    .btn:hover{transform:translateY(-2px);box-shadow:0 14px 26px rgba(15,37,54,.10)}
    .hero-metrics{
      display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin-top:26px
    }
    .metric{padding:16px;border-radius:18px;background:linear-gradient(180deg,#fff, #f8fcff);border:1px solid var(--line)}
    .metric b{display:block;font-size:1.35rem;margin-bottom:6px}
    .metric span{color:var(--muted);font-size:13px;line-height:1.5}
    .hero-side{padding:22px;display:flex;flex-direction:column;gap:16px}
    .side-note{padding:16px;border-radius:18px;background:linear-gradient(135deg, rgba(15,142,166,.08), rgba(42,111,242,.08));}
    .side-note h3{margin:0 0 8px;font-size:1.05rem}
    .side-note p,.mini-list li{margin:0;color:var(--muted);line-height:1.7;font-size:14px}
    .mini-list{list-style:none;padding:0;margin:0;display:grid;gap:10px}
    .mini-list li{padding:12px 14px;border-radius:14px;background:#fff;border:1px solid var(--line)}
    section{padding:18px 0}
    .section-title{display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:16px}
    .section-title h2{margin:0;font-size:clamp(1.35rem,2.3vw,2rem)}
    .section-title p{margin:0;color:var(--muted);max-width:68ch;line-height:1.7;font-size:14px}
    .grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
    .card{padding:20px}
    .card h3{margin:0 0 10px;font-size:1.02rem}
    .card p{margin:0;color:var(--muted);line-height:1.75;font-size:14px}
    .badge{display:inline-flex;align-items:center;gap:8px;font-size:12px;padding:7px 10px;border-radius:999px;background:#eef8fb;color:#0e6678;margin-bottom:12px}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag-cloud span{padding:9px 12px;border:1px solid var(--line);background:#fff;border-radius:999px;font-size:13px;color:#355061}
    .media-wrap{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .media-wrap img,.hero-side img,.review .avatar{border-radius:18px;border:1px solid var(--line);background:#fff}
    .media-wrap img{aspect-ratio: 4 / 3;object-fit:cover}
    .table-wrap{overflow:auto;border-radius:18px;border:1px solid var(--line);background:#fff;box-shadow:var(--shadow)}
    table{width:100%;border-collapse:collapse;min-width:820px}
    th,td{padding:15px 14px;border-bottom:1px solid #e8eef3;text-align:left;font-size:14px;vertical-align:top}
    th{background:#f7fbfd;color:#29475a}
    tr:last-child td{border-bottom:none}
    .timeline{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
    .timeline-item{padding:18px}
    .timeline-item strong{display:block;font-size:1rem;margin-bottom:8px}
    .timeline-item p{margin:0;color:var(--muted);line-height:1.7;font-size:14px}
    .faq-list{display:grid;gap:12px}
    .faq-item{overflow:hidden}
    .faq-q{
      width:100%;padding:18px 20px;border:0;background:transparent;color:var(--text);
      font-size:15px;font-weight:700;display:flex;align-items:center;justify-content:space-between;gap:12px;cursor:pointer;text-align:left
    }
    .faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease;padding:0 20px}
    .faq-a p{margin:0 0 18px;color:var(--muted);line-height:1.8;font-size:14px}
    .faq-item.active .faq-a{max-height:220px}
    .reviews,.articles,.prices,.network{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .review{padding:20px}
    .review-top{display:flex;align-items:center;gap:12px;margin-bottom:12px}
    .review .avatar{width:48px;height:48px;object-fit:cover}
    .review h3{margin:0;font-size:1rem}
    .review small{color:var(--muted)}
    .review p{margin:12px 0 0;color:var(--text);line-height:1.75;font-size:14px}
    .article{padding:18px}
    .article time{display:block;color:var(--muted);font-size:12px;margin-bottom:8px}
    .article h3{margin:0 0 8px;font-size:1rem}
    .article p{margin:0;color:var(--muted);line-height:1.72;font-size:14px}
    .form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
    form{display:grid;gap:12px}
    label{font-size:14px;font-weight:700;color:#29475a}
    input,select,textarea{
      width:100%;padding:13px 14px;border-radius:14px;border:1px solid var(--line);background:#fff;color:var(--text);
      font:inherit;outline:none;transition:.2s ease;
    }
    input:focus,select:focus,textarea:focus{border-color:rgba(15,142,166,.6);box-shadow:0 0 0 4px rgba(15,142,166,.10)}
    textarea{min-height:140px;resize:vertical}
    .contact-panel{padding:22px}
    .contact-list{list-style:none;padding:0;margin:0;display:grid;gap:12px}
    .contact-list li{padding:13px 14px;border-radius:14px;background:#f8fcff;border:1px solid var(--line);color:var(--text);line-height:1.7;font-size:14px}
    .qrcode{display:flex;gap:14px;align-items:center;flex-wrap:wrap}
    .qrcode img{width:140px;height:140px;object-fit:cover;border-radius:16px;border:1px solid var(--line);background:#fff}
    .footer{
      margin-top:10px;padding:22px 0 30px;border-top:1px solid rgba(217,230,239,.9);
      background:linear-gradient(180deg, rgba(244,248,251,.2), rgba(244,248,251,.85));
      color:var(--text);
    }
    .footer a{color:#145a6e}
    .footer-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:18px;align-items:start}
    .footer small{color:var(--muted)}
    .floating{
      position:fixed;right:16px;bottom:16px;z-index:60;display:grid;gap:10px
    }
    .floating a,.to-top{
      width:48px;height:48px;border-radius:16px;display:grid;place-items:center;
      background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;box-shadow:0 16px 30px rgba(15,142,166,.25);
      border:0;cursor:pointer
    }
    .to-top{display:none}
    .reveal{opacity:0;transform:translateY(18px);transition:.6s ease}
    .reveal.in{opacity:1;transform:none}
    .home-link{font-weight:700;color:#0e6678}
    .pricebox{padding:18px}
    .pricebox strong{display:block;font-size:1.15rem;margin-bottom:8px}
    .pricebox p{margin:0;color:var(--muted);line-height:1.7;font-size:14px}
    .anchor-bar{display:flex;flex-wrap:wrap;gap:10px}
    .anchor-bar a{padding:8px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);color:#355061;font-size:13px}
    @media (max-width: 980px){
      .hero-grid,.grid-3,.grid-4,.reviews,.articles,.prices,.network,.timeline,.footer-grid,.media-wrap,.form-grid,.grid-3,.grid-4{grid-template-columns:1fr 1fr}
      .hero-grid{grid-template-columns:1fr}
    }
    @media (max-width: 720px){
      .menu-btn{display:inline-flex}
      .nav-links{
        display:none;position:absolute;left:16px;right:16px;top:76px;padding:14px;background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow)
      }
      .nav-links.open{display:flex;flex-direction:column;align-items:flex-start}
      .hero{padding-top:18px}
      .hero-main{padding:24px}
      .hero-metrics,.grid-3,.grid-4,.reviews,.articles,.prices,.network,.timeline,.footer-grid,.media-wrap,.form-grid{grid-template-columns:1fr}
      .section-title{align-items:flex-start;flex-direction:column}
      table{min-width:720px}
      .floating{right:12px;bottom:12px}
    }