:root{
      --bg:#f5faf9;
      --bg2:#eef8f6;
      --card:#ffffff;
      --card2:#f8fbfb;
      --text:#163033;
      --muted:#5c7073;
      --line:#d7e7e5;
      --brand:#0e8f88;
      --brand2:#2ac3b5;
      --brand3:#1766b1;
      --shadow:0 18px 50px rgba(18, 74, 72, .10);
      --radius:22px;
      --radius2:16px;
      --container:1180px;
    }
    *{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(42,195,181,.12), transparent 26%),
        radial-gradient(circle at top right, rgba(23,102,177,.10), transparent 22%),
        linear-gradient(180deg, #fbfefe 0%, var(--bg) 44%, #f7fbfa 100%);
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(var(--container), calc(100% - 32px)); margin:0 auto}
    header,main,footer{position:relative}
    .topbar{
      position:sticky;top:0;z-index:50;
      backdrop-filter:blur(12px);
      background:rgba(249,253,252,.82);
      border-bottom:1px solid rgba(215,231,229,.9);
    }
    .nav{
      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 .logo-wrap{
      width:44px;height:44px;border-radius:14px;overflow:hidden;
      background:linear-gradient(135deg, rgba(14,143,136,.12), rgba(23,102,177,.10));
      border:1px solid rgba(14,143,136,.18);
      display:grid;place-items:center;flex:0 0 auto;
    }
    .brand .logo-wrap img{width:100%;height:100%;object-fit:contain;padding:6px}
    .brand-text{min-width:0}
    .brand-text strong{display:block;font-size:16px;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-links{display:flex;align-items:center;gap:18px;flex-wrap:wrap;justify-content:flex-end}
    .nav-links a{font-size:14px;color:#2f4a4c;padding:8px 0;position:relative}
    .nav-links a::after{
      content:"";position:absolute;left:0;bottom:2px;width:0;height:2px;border-radius:2px;background:linear-gradient(90deg,var(--brand),var(--brand2));transition:.25s ease;
    }
    .nav-links a:hover::after{width:100%}
    .nav-cta{display:flex;align-items:center;gap:10px}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      border:none;border-radius:999px;padding:12px 18px;font-weight:700;
      transition:transform .2s ease, box-shadow .2s ease, background .2s ease, color .2s ease;
      cursor:pointer;white-space:nowrap
    }
    .btn:hover{transform:translateY(-2px);box-shadow:0 12px 28px rgba(14,143,136,.18)}
    .btn-primary{color:#fff;background:linear-gradient(135deg,var(--brand),var(--brand2))}
    .btn-ghost{color:var(--brand);background:rgba(14,143,136,.08);border:1px solid rgba(14,143,136,.12)}
    .menu-btn{display:none;background:transparent;border:1px solid var(--line);border-radius:14px;padding:10px 12px;color:var(--text)}
    .hero{
      padding:42px 0 30px;
      position:relative;
    }
    .hero-grid{
      display:grid;grid-template-columns:1.15fr .85fr;gap:22px;align-items:stretch
    }
    .hero-copy,.hero-panel,.section-card,.info-card,.review-card,.faq-item,.form-card,.article-card,.case-card,.price-card,.timeline-card,.service-card,.compare-card,.network-card{
      background:rgba(255,255,255,.84);
      border:1px solid rgba(215,231,229,.95);
      box-shadow:var(--shadow);
      border-radius:var(--radius);
    }
    .hero-copy{padding:34px;overflow:hidden;position:relative}
    .hero-copy::before{
      content:"";position:absolute;inset:auto -70px -70px auto;width:220px;height:220px;border-radius:50%;
      background:radial-gradient(circle, rgba(42,195,181,.16), transparent 65%);
      pointer-events:none;
    }
    .eyebrow{
      display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;
      background:rgba(14,143,136,.08);color:var(--brand);font-size:13px;font-weight:700;
      border:1px solid rgba(14,143,136,.12)
    }
    h1{margin:16px 0 14px;font-size:clamp(30px,4vw,52px);line-height:1.08;letter-spacing:-.8px}
    .lead{font-size:17px;line-height:1.8;color:#3b5254;max-width:60ch;margin:0}
    .hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px}
    .hero-points{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:24px}
    .point{
      padding:16px;border-radius:18px;background:linear-gradient(180deg,#fff,#f7fbfb);
      border:1px solid var(--line)
    }
    .point strong{display:block;font-size:20px}
    .point span{display:block;margin-top:6px;color:var(--muted);font-size:13px;line-height:1.6}
    .hero-panel{padding:24px;display:flex;flex-direction:column;gap:16px}
    .panel-head{display:flex;align-items:center;justify-content:space-between;gap:12px}
    .mini-tag{font-size:12px;color:var(--brand);background:rgba(14,143,136,.08);padding:6px 10px;border-radius:999px;font-weight:700}
    .metric-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
    .metric{
      padding:16px;border-radius:18px;background:linear-gradient(180deg,#fff,#f7fbfb);
      border:1px solid var(--line)
    }
    .metric strong{font-size:26px;display:block}
    .metric span{font-size:13px;color:var(--muted)}
    .stack{
      display:grid;gap:10px
    }
    .stack .line{
      display:flex;justify-content:space-between;gap:12px;align-items:center;
      padding:12px 14px;border-radius:14px;background:#f8fbfb;border:1px solid var(--line);
      color:#395357;font-size:14px
    }
    section{padding:16px 0 6px}
    .section-card{padding:26px}
    .section-title{display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:18px}
    .section-title h2{margin:0;font-size:28px}
    .section-title p{margin:0;color:var(--muted);line-height:1.7;max-width:64ch}
    .grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
    .service-card,.review-card,.case-card,.article-card,.faq-item,.info-card,.compare-card,.price-card,.timeline-card,.network-card{padding:20px}
    .service-card h3,.case-card h3,.article-card h3,.info-card h3,.price-card h3,.timeline-card h3,.network-card h3,.review-card h3{margin:0 0 10px;font-size:18px}
    .service-card p,.case-card p,.article-card p,.info-card p,.price-card p,.timeline-card p,.network-card p,.review-card p{margin:0;color:var(--muted);line-height:1.75}
    .icon{
      width:42px;height:42px;border-radius:14px;display:grid;place-items:center;margin-bottom:14px;
      background:linear-gradient(135deg, rgba(14,143,136,.12), rgba(42,195,181,.08));
      color:var(--brand);font-weight:800
    }
    .chips{display:flex;flex-wrap:wrap;gap:10px}
    .chip{padding:8px 11px;border-radius:999px;background:#eef8f6;border:1px solid var(--line);font-size:13px;color:#315356}
    .split{
      display:grid;grid-template-columns:1fr 1fr;gap:14px;align-items:start
    }
    .timeline{display:grid;gap:12px}
    .timeline-item{display:flex;gap:14px;align-items:flex-start;padding:14px;border-radius:16px;background:#f9fcfc;border:1px solid var(--line)}
    .dot{width:12px;height:12px;border-radius:999px;background:linear-gradient(135deg,var(--brand),var(--brand2));margin-top:6px;flex:0 0 auto}
    .timeline-item strong{display:block;margin-bottom:4px}
    .compare-wrap{overflow:auto}
    table{width:100%;border-collapse:collapse;min-width:760px}
    th,td{padding:14px 12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
    th{background:#f5fbfa;color:#214345;font-size:14px}
    td{color:#385456;line-height:1.7}
    .rating{
      display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-top:10px
    }
    .stars{color:#d99b17;font-size:18px;letter-spacing:2px}
    .quote{
      font-size:15px;line-height:1.8;color:#31474a;
    }
    .review-meta{margin-top:14px;display:flex;justify-content:space-between;gap:12px;align-items:center;color:var(--muted);font-size:13px}
    .article-list{display:grid;gap:12px}
    .article-row{
      display:flex;justify-content:space-between;gap:12px;align-items:center;padding:14px 16px;border-radius:16px;
      background:#f8fbfb;border:1px solid var(--line)
    }
    .article-row span{color:var(--muted);font-size:13px}
    .form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
    .field{display:flex;flex-direction:column;gap:8px}
    .field.full{grid-column:1 / -1}
    label{font-size:14px;font-weight:700;color:#294547}
    input,select,textarea{
      width:100%;border:1px solid var(--line);border-radius:14px;background:#fff;color:var(--text);
      padding:13px 14px;font:inherit;outline:none;transition:border .2s ease, box-shadow .2s ease
    }
    input:focus,select:focus,textarea:focus{border-color:rgba(14,143,136,.55);box-shadow:0 0 0 4px rgba(14,143,136,.10)}
    textarea{min-height:126px;resize:vertical}
    .footer{
      margin-top:18px;padding:24px 0 30px;border-top:1px solid rgba(215,231,229,.95);
      background:linear-gradient(180deg, rgba(245,250,249,.2), rgba(235,246,244,.8))
    }
    .footer-grid{display:grid;grid-template-columns:1.1fr .9fr .9fr;gap:20px}
    .footer h3{margin:0 0 12px;font-size:18px}
    .footer p,.footer a,.footer li{color:#385456;line-height:1.8;font-size:14px}
    .footer ul{margin:0;padding:0;list-style:none;display:grid;gap:8px}
    .footer-bottom{margin-top:18px;padding-top:14px;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;color:var(--muted);font-size:13px}
    .float-bar{
      position:fixed;right:16px;bottom:16px;z-index:60;display:grid;gap:10px
    }
    .float-bar a,.float-bar button{
      width:50px;height:50px;border-radius:16px;border:1px solid var(--line);background:#fff;box-shadow:var(--shadow);
      display:grid;place-items:center;color:var(--brand);cursor:pointer
    }
    .backtop{display:none}
    .accordion{display:grid;gap:12px}
    .faq-item{padding:0;overflow:hidden}
    .faq-q{
      width:100%;padding:18px 18px;border:none;background:transparent;display:flex;justify-content:space-between;gap:12px;
      align-items:center;color:var(--text);font:inherit;font-weight:700;text-align:left;cursor:pointer
    }
    .faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease; padding:0 18px}
    .faq-item.open .faq-a{max-height:180px;padding-bottom:18px}
    .faq-a p{margin:0;color:var(--muted);line-height:1.75}
    .small-note{color:var(--muted);font-size:13px;line-height:1.7}
    .mobile-hide{display:block}
    .nav-mobile{display:none}
    .hero-logo-line{
      display:flex;align-items:center;gap:14px;margin-top:22px;flex-wrap:wrap
    }
    .hero-logo-line img{width:92px;height:auto;border-radius:18px;border:1px solid var(--line);background:#fff;padding:8px}
    .subgrid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag-cloud span{padding:8px 12px;border-radius:999px;background:#f3faf8;border:1px solid var(--line);font-size:13px;color:#2f4c4f}
    .kefu-box{display:flex;gap:16px;align-items:center}
    .kefu-box img{width:120px;height:120px;object-fit:cover;border-radius:18px;border:1px solid var(--line);background:#fff}
    @media (max-width: 1024px){
      .hero-grid,.grid-4,.grid-3,.split,.footer-grid{grid-template-columns:1fr}
      .hero-points,.metric-grid,.subgrid{grid-template-columns:1fr 1fr}
    }
    @media (max-width: 780px){
      .nav-links,.nav-cta .btn-ghost{display:none}
      .menu-btn{display:inline-flex}
      .nav-mobile{
        display:none;padding:0 0 14px
      }
      .nav-mobile.open{display:block}
      .nav-mobile .panel{
        display:grid;gap:10px;padding:14px;border-radius:18px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow)
      }
      .nav-mobile a{padding:10px 12px;border-radius:12px;background:#f7fbfb;border:1px solid var(--line);font-size:14px;color:#2b4749}
      .hero-copy,.hero-panel,.section-card{padding:20px}
      .hero-points,.metric-grid,.subgrid,.form-grid{grid-template-columns:1fr}
      .section-title{align-items:start;flex-direction:column}
      h1{font-size:30px}
      .kefu-box{align-items:flex-start;flex-direction:column}
    }
    .reveal{opacity:0;transform:translateY(16px);transition:opacity .55s ease, transform .55s ease}
    .reveal.in{opacity:1;transform:none}