:root{
      --bg:#f6fafb;
      --bg2:#eef7f7;
      --card:#ffffff;
      --line:#d8e6e8;
      --text:#183033;
      --muted:#5e7175;
      --brand:#0f8d96;
      --brand2:#2bc4b3;
      --brand3:#155d84;
      --accent:#e8fbf8;
      --shadow:0 18px 40px rgba(13, 75, 82, .08);
      --shadow2:0 10px 24px rgba(13, 75, 82, .12);
      --radius:22px;
      --radius2:16px;
      --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(43,196,179,.14), transparent 28%),
        radial-gradient(circle at top right, rgba(21,93,132,.10), transparent 22%),
        linear-gradient(180deg, #ffffff 0%, var(--bg) 24%, #f4fbfb 100%);
    }
    a{color:var(--brand3);text-decoration:none}
    a:hover{color:var(--brand)}
    img{display:block;max-width:100%}
    .container{width:min(var(--container), calc(100% - 32px)); margin:0 auto}
    .topbar{
      position:sticky;top:0;z-index:40;
      background:rgba(255,255,255,.84);
      backdrop-filter: blur(12px);
      border-bottom:1px solid rgba(216,230,232,.9);
    }
    .nav{
      display:flex;align-items:center;justify-content:space-between;gap:18px;
      min-height:74px;
    }
    .brand{display:flex;align-items:center;gap:12px;min-width:0}
    .brand .ai-page-logo{width:42px;height:42px;object-fit:contain;border-radius:10px;background:#fff;border:1px solid var(--line);padding:4px;box-shadow:0 6px 16px rgba(0,0,0,.05)}
    .brand strong{display:block;font-size:18px;line-height:1.1}
    .brand span{display:block;font-size:12px;color:var(--muted);margin-top:3px}
    .nav-toggle{display:none;border:1px solid var(--line);background:#fff;border-radius:12px;padding:10px 12px;color:var(--text)}
    .nav-links{display:flex;align-items:center;gap:18px;flex-wrap:wrap;justify-content:flex-end}
    .nav-links a{font-size:14px;color:var(--text);padding:8px 0;position:relative}
    .nav-links a::after{content:"";position:absolute;left:0;bottom:2px;width:0;height:2px;background:linear-gradient(90deg,var(--brand),var(--brand2));transition:.25s ease}
    .nav-links a:hover::after{width:100%}
    .hero{padding:34px 0 18px}
    .hero-grid{
      display:grid;grid-template-columns:1.15fr .85fr;gap:22px;align-items:stretch
    }
    .hero-main,.hero-side,.section-card,.info-card,.quote-card,.faq-item,.form-card,.promo-card,.review-card,.article-card,.case-card,.compare-card,.price-card{
      background:var(--card);border:1px solid rgba(216,230,232,.95);border-radius:var(--radius);box-shadow:var(--shadow)
    }
    .hero-main{padding:30px;position:relative;overflow:hidden}
    .hero-main::before,.hero-main::after{
      content:"";position:absolute;border-radius:999px;filter:blur(3px);pointer-events:none
    }
    .hero-main::before{width:220px;height:220px;right:-60px;top:-50px;background:radial-gradient(circle, rgba(43,196,179,.22), transparent 60%)}
    .hero-main::after{width:180px;height:180px;right:110px;bottom:-70px;background:radial-gradient(circle, rgba(21,93,132,.15), transparent 60%)}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;background:var(--accent);color:var(--brand3);font-size:13px;font-weight:700}
    h1{margin:16px 0 12px;font-size:clamp(32px, 4vw, 54px);line-height:1.06;letter-spacing:-.03em}
    .lead{margin:0;color:var(--muted);font-size:16px;line-height:1.8;max-width:58ch}
    .cta-row{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      border:none;border-radius:14px;padding:12px 18px;font-weight:700;font-size:14px;cursor:pointer;
      transition:transform .2s ease, box-shadow .2s ease, background .2s ease;
    }
    .btn:hover{transform:translateY(-2px);box-shadow:var(--shadow2)}
    .btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff}
    .btn-secondary{background:#eef8f8;color:var(--text);border:1px solid var(--line)}
    .hero-stats{
      margin-top:24px;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px
    }
    .stat{
      padding:16px;border-radius:18px;background:linear-gradient(180deg,#fff, #f6fbfb);
      border:1px solid #e2eff0
    }
    .stat strong{display:block;font-size:22px;color:var(--brand3)}
    .stat span{display:block;margin-top:6px;color:var(--muted);font-size:13px;line-height:1.45}
    .hero-side{padding:18px;display:grid;gap:14px}
    .mini-panel{
      padding:18px;border-radius:18px;background:linear-gradient(180deg,#f8fefe,#edf9f7);border:1px solid #dff1ee
    }
    .mini-panel h3{margin:0 0 10px;font-size:18px}
    .mini-panel p{margin:0;color:var(--muted);line-height:1.7;font-size:14px}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag{padding:8px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);font-size:13px;color:#28555d}
    .section{padding:16px 0}
    .section-head{display:flex;justify-content:space-between;gap:16px;align-items:end;margin-bottom:16px}
    .section-head h2{margin:0;font-size:28px;line-height:1.15}
    .section-head p{margin:0;color:var(--muted);max-width:64ch;line-height:1.7}
    .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}
    .info-card,.review-card,.article-card,.case-card,.compare-card,.price-card,.form-card,.faq-item,.promo-card{padding:22px}
    .info-card h3,.review-card h3,.article-card h3,.case-card h3,.compare-card h3,.price-card h3{margin:0 0 10px;font-size:18px}
    .info-card p,.review-card p,.article-card p,.case-card p,.price-card p{margin:0;color:var(--muted);line-height:1.75}
    .icon-badge{width:44px;height:44px;border-radius:14px;display:grid;place-items:center;background:linear-gradient(135deg,#dcfbf5,#edf4ff);color:var(--brand3);font-size:20px;margin-bottom:14px}
    .split{
      display:grid;grid-template-columns:1fr 1fr;gap:16px;align-items:start
    }
    .list{margin:14px 0 0;padding:0;list-style:none;display:grid;gap:10px}
    .list li{display:flex;gap:10px;align-items:flex-start;color:var(--text);line-height:1.7}
    .list i{flex:0 0 20px;width:20px;height:20px;border-radius:50%;background:var(--accent);color:var(--brand);font-style:normal;display:grid;place-items:center;font-size:12px;margin-top:4px}
    .table-wrap{overflow-x:auto;border-radius:18px;border:1px solid var(--line);background:#fff}
    table{width:100%;border-collapse:collapse;min-width:820px}
    th,td{padding:14px 16px;border-bottom:1px solid #e7f0f1;text-align:left;font-size:14px;vertical-align:top}
    th{background:#f4fbfb;color:#24474d}
    tr:hover td{background:#fbfefe}
    .rating{display:flex;align-items:center;gap:10px;margin:10px 0 0}
    .stars{color:#f4b840;font-size:20px;letter-spacing:2px}
    .score{font-weight:800;color:var(--brand3)}
    .steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
    .step{padding:20px;border-radius:20px;background:linear-gradient(180deg,#fff,#f8fbfb);border:1px solid #e0edef}
    .step .num{display:inline-flex;width:34px;height:34px;border-radius:12px;background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;align-items:center;justify-content:center;font-weight:800;margin-bottom:12px}
    .step h3{margin:0 0 8px;font-size:17px}
    .step p{margin:0;color:var(--muted);line-height:1.7;font-size:14px}
    .faq-list{display:grid;gap:12px}
    .faq-item{padding:0;overflow:hidden}
    .faq-q{width:100%;text-align:left;border:none;background:#fff;padding:18px 20px;font-size:16px;font-weight:700;color:var(--text);display:flex;justify-content:space-between;gap:12px;align-items:center;cursor:pointer}
    .faq-q span{color:var(--brand)}
    .faq-a{display:none;padding:0 20px 18px;color:var(--muted);line-height:1.8}
    .faq-item.open .faq-a{display:block}
    .faq-item.open .faq-q{background:linear-gradient(180deg,#f7fefe,#fff)}
    .articles{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .article-card small,.case-card small,.review-card small{color:var(--brand);font-weight:700}
    .form-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:16px;align-items:start}
    form{display:grid;gap:12px}
    .field{display:grid;gap:8px}
    label{font-size:14px;font-weight:700;color:#28454a}
    input,select,textarea{
      width:100%;border:1px solid #d7e6e8;border-radius:14px;background:#fff;padding:13px 14px;
      font:inherit;color:var(--text);outline:none;transition:border-color .2s ease, box-shadow .2s ease
    }
    textarea{min-height:126px;resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:rgba(15,141,150,.65);box-shadow:0 0 0 4px rgba(43,196,179,.12)}
    .footer{
      margin-top:14px;padding:22px 0 28px;border-top:1px solid rgba(216,230,232,.9);color:#254349
    }
    .footer-grid{display:grid;grid-template-columns:1.1fr .9fr .9fr;gap:18px;align-items:start}
    .footer a{color:#1d6670}
    .footer a:hover{color:var(--brand)}
    .footer .small{color:var(--muted);line-height:1.8;font-size:14px}
    .footer-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px 16px}
    .qr{display:flex;gap:14px;align-items:center}
    .qr img{width:96px;height:96px;object-fit:cover;border-radius:14px;border:1px solid var(--line);background:#fff}
    .floating{
      position:fixed;right:18px;bottom:18px;z-index:50;display:grid;gap:10px
    }
    .float-btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      border-radius:999px;padding:12px 16px;background:linear-gradient(135deg,var(--brand3),var(--brand));color:#fff;
      box-shadow:var(--shadow2);font-weight:700
    }
    .backtop{background:#fff;color:var(--text);border:1px solid var(--line)}
    .mobile-only{display:none}
    .compare-card .rating strong{font-size:24px}
    .case-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:14px}
    .case-item{padding:14px;border-radius:16px;background:#f8fcfc;border:1px solid #e2efef}
    .case-item b{display:block;margin-bottom:6px}
    .timeline{display:grid;gap:12px}
    .timeline .t{display:flex;gap:12px;align-items:flex-start;padding:14px 0;border-bottom:1px dashed #d9e8e9}
    .timeline .dot{width:12px;height:12px;border-radius:50%;margin-top:6px;background:linear-gradient(135deg,var(--brand),var(--brand2));box-shadow:0 0 0 6px rgba(43,196,179,.12)}
    .timeline .t:last-child{border-bottom:none}
    .link-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .link-cloud a{padding:9px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);font-size:13px}
    .muted{color:var(--muted)}
    .ai-page-home-link{font-weight:700}
    .ai-page-image{border-radius:18px;border:1px solid var(--line);box-shadow:var(--shadow)}
    @media (max-width: 1024px){
      .hero-grid,.split,.form-grid,.footer-grid,.grid-3,.articles,.steps,.grid-2{grid-template-columns:1fr 1fr}
      .hero-stats{grid-template-columns:repeat(2,minmax(0,1fr))}
    }
    @media (max-width: 768px){
      .nav-toggle{display:inline-flex}
      .nav-links{
        display:none;position:absolute;left:16px;right:16px;top:74px;background:#fff;border:1px solid var(--line);
        border-radius:18px;padding:14px;box-shadow:var(--shadow);flex-direction:column;align-items:flex-start;gap:10px
      }
      .nav-links.open{display:flex}
      .hero-grid,.split,.form-grid,.footer-grid,.grid-3,.articles,.steps,.grid-2,.case-list{grid-template-columns:1fr}
      .hero-main{padding:24px}
      .hero-stats{grid-template-columns:1fr 1fr}
      .section-head{flex-direction:column;align-items:flex-start}
      .mobile-only{display:inline-flex}
      .table-wrap{border-radius:16px}
      .floating{right:12px;bottom:12px}
    }
    .reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease, transform .6s ease}
    .reveal.visible{opacity:1;transform:none}