:root{
      --bg:#f4fbfb;
      --surface:#ffffff;
      --surface-2:#eef8f8;
      --text:#163033;
      --muted:#557173;
      --primary:#0ea5a4;
      --primary-2:#2563eb;
      --accent:#10b981;
      --line:#d6e9ea;
      --shadow:0 18px 40px rgba(18, 78, 81, .10);
      --radius:22px;
      --max:1200px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family: system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(14,165,164,.16), transparent 28%),
        radial-gradient(circle at top right, rgba(37,99,235,.10), transparent 24%),
        linear-gradient(180deg, #f8fefe 0%, #f2fafb 100%);
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%;height:auto}
    .container{max-width:var(--max);margin:0 auto;padding:0 20px}
    .site-header{
      position:sticky;top:0;z-index:40;
      backdrop-filter:blur(14px);
      background:rgba(244,251,251,.84);
      border-bottom:1px solid rgba(214,233,234,.75);
    }
    .header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:76px}
    .brand{display:flex;align-items:center;gap:12px;min-width:0}
    .brand .ai-page-logo{width:44px;flex:none;border-radius:12px;box-shadow:0 8px 22px rgba(14,165,164,.18)}
    .brand-text{display:flex;flex-direction:column;gap:2px;min-width:0}
    .brand-text strong{font-size:18px;letter-spacing:.4px}
    .brand-text span{font-size:12px;color:var(--muted)}
    .nav{display:flex;align-items:center;gap:18px;flex-wrap:wrap;justify-content:flex-end}
    .nav a{font-size:14px;color:var(--muted);padding:8px 0;white-space:nowrap}
    .nav a:hover,.nav a:focus{color:var(--primary)}
    .menu-btn{
      display:none;border:1px solid var(--line);background:var(--surface);color:var(--text);
      border-radius:12px;padding:10px 12px;box-shadow:0 6px 18px rgba(18,78,81,.06)
    }
    .hero{padding:34px 0 20px}
    .hero-card{
      position:relative;overflow:hidden;border-radius:30px;
      background:linear-gradient(135deg,#093b3f 0%, #0b6a6d 46%, #1377cb 100%);
      color:#f6ffff;box-shadow:var(--shadow);
      padding:34px;
    }
    .hero-card:before,.hero-card:after{
      content:"";position:absolute;border-radius:999px;pointer-events:none;filter:blur(1px)
    }
    .hero-card:before{width:280px;height:280px;background:rgba(255,255,255,.10);right:-80px;top:-80px}
    .hero-card:after{width:160px;height:160px;background:rgba(16,185,129,.18);left:-50px;bottom:-50px}
    .hero-grid{display:grid;grid-template-columns:1.25fr .85fr;gap:24px;align-items:stretch;position:relative;z-index:1}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;background:rgba(255,255,255,.10);border:1px solid rgba(255,255,255,.18);font-size:13px}
    h1{font-size:clamp(30px,4.5vw,54px);line-height:1.06;margin:18px 0 14px;letter-spacing:-.03em}
    .hero p{margin:0;color:rgba(246,255,255,.88);font-size:16px;line-height:1.8;max-width:62ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      border-radius:14px;padding:13px 18px;font-weight:700;border:1px solid transparent;
      transition:.25s ease;cursor:pointer
    }
    .btn-primary{background:#ffffff;color:#0a4b56;box-shadow:0 12px 28px rgba(0,0,0,.16)}
    .btn-secondary{background:rgba(255,255,255,.08);color:#fff;border-color:rgba(255,255,255,.18)}
    .btn:hover{transform:translateY(-2px)}
    .hero-side{
      display:grid;gap:14px;align-content:start;
      background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.14);border-radius:24px;padding:18px
    }
    .metric{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.14);border-radius:18px;padding:16px}
    .metric strong{display:block;font-size:28px;line-height:1.1}
    .metric span{display:block;margin-top:6px;font-size:13px;color:rgba(246,255,255,.82)}
    .section{padding:20px 0}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:14px;margin-bottom:18px}
    .section-head h2{margin:0;font-size:clamp(24px,3vw,34px)}
    .section-head p{margin:0;color:var(--muted);line-height:1.7;max-width:60ch}
    .grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
    .card{
      background:var(--surface);border:1px solid rgba(214,233,234,.9);border-radius:var(--radius);
      box-shadow:0 10px 30px rgba(18,78,81,.06);padding:18px;transition:.25s ease
    }
    .card:hover{transform:translateY(-4px);box-shadow:0 18px 40px rgba(18,78,81,.11)}
    .card h3{margin:0 0 10px;font-size:18px}
    .card p,.card li{color:var(--muted);line-height:1.75}
    .chip-wrap{display:flex;flex-wrap:wrap;gap:10px}
    .chip{padding:9px 12px;border-radius:999px;background:#eefaf9;border:1px solid var(--line);font-size:13px;color:#24585c}
    .service-list{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    .service-item{padding:16px;border-radius:20px;background:linear-gradient(180deg,#fff 0%,#f7fcfc 100%);border:1px solid var(--line)}
    .service-item strong{display:block;margin-bottom:8px}
    .steps{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .step{padding:18px;border-radius:22px;background:linear-gradient(180deg,#fff 0%,#f5fbfb 100%);border:1px solid var(--line);position:relative}
    .step .num{width:36px;height:36px;border-radius:50%;display:grid;place-items:center;background:linear-gradient(135deg,var(--primary),var(--primary-2));color:#fff;font-weight:800;margin-bottom:12px}
    .table-wrap{overflow-x:auto;border-radius:22px;border:1px solid var(--line);background:var(--surface)}
    table{width:100%;border-collapse:collapse;min-width:860px}
    th,td{padding:16px 14px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
    th{background:#edf9f9;color:#163033;font-size:14px}
    td{color:var(--muted);line-height:1.7}
    .compare-badge{display:inline-flex;align-items:center;gap:8px;padding:10px 12px;border-radius:14px;background:#effdf7;color:#0f6b47;font-weight:700}
    .rating{font-size:18px;color:#eab308;font-weight:800}
    .testimonial{display:grid;gap:10px}
    .quote{font-size:15px;line-height:1.8;color:var(--muted)}
    .person{display:flex;align-items:center;justify-content:space-between;gap:10px}
    .person strong{font-size:15px}
    .person span{font-size:13px;color:var(--muted)}
    .timeline{display:grid;gap:12px}
    .timeline-item{display:grid;grid-template-columns:120px 1fr;gap:14px;padding:14px 0;border-bottom:1px dashed #dbe9ea}
    .timeline-item:last-child{border-bottom:0}
    .time{font-weight:700;color:#0f6b74}
    .faq{display:grid;gap:12px}
    details{
      background:var(--surface);border:1px solid var(--line);border-radius:18px;box-shadow:0 8px 24px rgba(18,78,81,.05)
    }
    summary{
      list-style:none;cursor:pointer;padding:16px 18px;font-weight:700;display:flex;align-items:center;justify-content:space-between;gap:14px
    }
    summary::-webkit-details-marker{display:none}
    summary:after{content:"+";font-size:22px;color:var(--primary);line-height:1}
    details[open] summary:after{content:"–"}
    details .faq-body{padding:0 18px 18px;color:var(--muted);line-height:1.8}
    .form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    .field{display:grid;gap:8px}
    .field label{font-weight:700;font-size:14px}
    .field input,.field select,.field textarea{
      width:100%;border:1px solid #cfe5e6;background:#fbfefe;color:var(--text);
      border-radius:14px;padding:13px 14px;font:inherit;outline:none;transition:.2s ease
    }
    .field textarea{min-height:120px;resize:vertical}
    .field input:focus,.field select:focus,.field textarea:focus{border-color:var(--primary);box-shadow:0 0 0 4px rgba(14,165,164,.12)}
    .form-actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center;margin-top:4px}
    .muted{color:var(--muted)}
    .footer{
      margin-top:20px;padding:24px 0 28px;background:#eaf7f8;border-top:1px solid var(--line);color:#1c3639
    }
    .footer a{color:#0f6672}
    .footer-grid{display:grid;grid-template-columns:1.1fr .9fr .9fr;gap:18px}
    .bottom{margin-top:18px;padding-top:16px;border-top:1px solid rgba(20,68,71,.10);font-size:13px;color:#486668}
    .floating{
      position:fixed;right:18px;bottom:18px;z-index:50;display:grid;gap:10px
    }
    .floating a,.floating button{
      width:52px;height:52px;border-radius:16px;border:1px solid var(--line);background:#fff;box-shadow:0 12px 28px rgba(18,78,81,.14);
      display:grid;place-items:center;cursor:pointer;color:#0f6672;font-weight:800
    }
    .floating .top{display:none}
    .mobile-nav{display:none}
    .article-list{display:grid;gap:12px}
    .article{display:flex;justify-content:space-between;gap:14px;align-items:center;padding:14px 0;border-bottom:1px solid #e2efef}
    .article:last-child{border-bottom:0}
    .article strong{display:block;margin-bottom:4px}
    .article span{color:var(--muted);font-size:13px}
    .media-box{display:grid;gap:14px}
    .media-row{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    .image-card{border-radius:22px;overflow:hidden;border:1px solid var(--line);background:#fff;box-shadow:0 8px 24px rgba(18,78,81,.06)}
    .image-card img{width:100%;aspect-ratio:16/10;object-fit:cover}
    .image-card .caption{padding:12px 14px;color:var(--muted);font-size:14px}
    .dual-surface{display:grid;grid-template-columns:1fr 1fr;gap:16px}
    .price{display:grid;gap:12px}
    .price-item{padding:16px;border-radius:18px;background:#f7fcfc;border:1px solid var(--line)}
    .price-item strong{display:block;font-size:18px;margin-bottom:6px}
    .response{display:flex;gap:10px;flex-wrap:wrap}
    .tagline{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:#dffcf8;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.15);padding:8px 12px;border-radius:999px}
    .whatsapp{
      position:fixed;left:18px;bottom:18px;z-index:50;max-width:170px;background:#fff;border:1px solid var(--line);border-radius:20px;padding:10px;box-shadow:0 12px 28px rgba(18,78,81,.14)
    }
    .whatsapp img{border-radius:14px}
    .whatsapp span{display:block;font-size:12px;color:var(--muted);margin-top:6px;text-align:center}
    @media (max-width: 1100px){
      .grid-4,.steps,.footer-grid{grid-template-columns:repeat(2,1fr)}
      .hero-grid,.grid-3,.grid-2,.dual-surface{grid-template-columns:1fr}
    }
    @media (max-width: 760px){
      .header-inner{min-height:68px}
      .nav{display:none}
      .menu-btn{display:inline-flex}
      .mobile-nav{
        display:none;padding:0 0 14px
      }
      .mobile-nav.open{display:block}
      .mobile-nav .panel{
        display:grid;gap:10px;padding:14px;border:1px solid var(--line);border-radius:18px;background:#fff;box-shadow:0 12px 28px rgba(18,78,81,.08)
      }
      .mobile-nav a{padding:10px 0;border-bottom:1px solid #edf3f4;color:#315154}
      .mobile-nav a:last-child{border-bottom:0}
      .hero-card{padding:22px}
      .hero-grid,.grid-4,.grid-3,.grid-2,.service-list,.form-grid,.steps,.footer-grid,.media-row{grid-template-columns:1fr}
      .timeline-item{grid-template-columns:1fr}
      .floating .top{display:grid}
      .whatsapp{display:none}
      table{min-width:760px}
      .section-head{flex-direction:column;align-items:flex-start}
    }
    .reveal{opacity:0;transform:translateY(18px);transition:.7s ease}
    .reveal.show{opacity:1;transform:translateY(0)}