:root{
      --bg:#f5f8fb;
      --bg2:#eef7fb;
      --card:#ffffff;
      --text:#163042;
      --muted:#5f7484;
      --line:#d9e6ef;
      --primary:#18a8b8;
      --primary2:#2563eb;
      --accent:#13c2c2;
      --shadow:0 18px 50px rgba(17,62,80,.10);
      --radius:22px;
      --container:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:Inter,system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(24,168,184,.12), transparent 28%),
        radial-gradient(circle at top right, rgba(37,99,235,.10), transparent 22%),
        linear-gradient(180deg, #ffffff 0%, var(--bg) 28%, #f7fbfd 100%);
      line-height:1.7;
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(var(--container), calc(100% - 32px)); margin:0 auto}
    header{position:sticky;top:0;z-index:40;backdrop-filter:blur(12px);background:rgba(245,248,251,.82);border-bottom:1px solid rgba(217,230,239,.75)}
    .topbar{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 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 22px rgba(0,0,0,.06)}
    .brand h2{margin:0;font-size:18px;line-height:1.2}
    .brand p{margin:2px 0 0;color:var(--muted);font-size:12px}
    .nav-toggle{display:none;border:1px solid var(--line);background:#fff;border-radius:12px;padding:10px 12px;color:var(--text)}
    nav{display:flex;align-items:center;gap:14px;flex-wrap:wrap;justify-content:flex-end}
    nav a{font-size:14px;color:#355061;padding:8px 10px;border-radius:999px;transition:.25s ease}
    nav a:hover,nav a.active{background:rgba(24,168,184,.10);color:#0f6773}
    .hero{padding:42px 0 22px}
    .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,.feature-card,.step-card,.case-card,.news-card,.faq-item,.form-card,.compare-wrap,.quote-card{background:rgba(255,255,255,.88);border:1px solid rgba(217,230,239,.9);border-radius:var(--radius);box-shadow:var(--shadow)}
    .hero-copy{padding:34px}
    .kicker{display:inline-flex;align-items:center;gap:8px;padding:7px 12px;border-radius:999px;background:linear-gradient(90deg, rgba(24,168,184,.12), rgba(37,99,235,.10));color:#0d6470;font-size:13px;font-weight:700}
    h1{margin:16px 0 14px;font-size:clamp(30px,5vw,54px);line-height:1.08;letter-spacing:-.03em}
    .hero-copy p{margin:0;color:var(--muted);font-size:16px;max-width:62ch}
    .hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 18px;border-radius:14px;border:1px solid transparent;font-weight:700;transition:.25s ease;cursor:pointer}
    .btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary2));color:#fff;box-shadow:0 12px 28px rgba(24,168,184,.22)}
    .btn-secondary{background:#fff;border-color:var(--line);color:var(--text)}
    .btn:hover,.feature-card:hover,.review-card:hover,.case-card:hover,.news-card:hover,.step-card:hover,.info-card:hover{transform:translateY(-3px)}
    .hero-points{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:26px}
    .mini-stat{padding:16px;border:1px solid var(--line);border-radius:18px;background:#fafdff}
    .mini-stat strong{display:block;font-size:22px}
    .mini-stat span{color:var(--muted);font-size:13px}
    .hero-panel{padding:28px;position:relative;overflow:hidden}
    .hero-panel::before{content:"";position:absolute;inset:-30% -20% auto auto;width:220px;height:220px;border-radius:50%;background:radial-gradient(circle, rgba(24,168,184,.22), transparent 66%);pointer-events:none}
    .panel-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;position:relative}
    .panel-box{padding:16px;border-radius:18px;background:linear-gradient(180deg,#f7fbfe,#eef9fb);border:1px solid #d8ebf0}
    .panel-box strong{display:block;font-size:15px}
    .panel-box p{margin:6px 0 0;color:var(--muted);font-size:13px}
    .section{padding:18px 0 8px}
    .section-head{display:flex;align-items: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:70ch}
    .section-card{padding:24px}
    .grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
    .grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    .info-card,.feature-card,.step-card,.case-card,.news-card,.review-card,.quote-card{padding:20px}
    .tag{display:inline-flex;align-items:center;padding:5px 10px;border-radius:999px;background:rgba(19,194,194,.12);color:#0d6a73;font-size:12px;font-weight:700}
    .feature-card h3,.step-card h3,.case-card h3,.review-card h3,.news-card h3,.info-card h3{margin:12px 0 8px;font-size:18px}
    .muted{color:var(--muted)}
    .service-tags,.cloud{display:flex;flex-wrap:wrap;gap:10px}
    .cloud span{padding:9px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);font-size:13px}
    .timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .timeline .step-card{position:relative}
    .timeline .step-card::after{content:"";position:absolute;top:24px;right:-10px;width:20px;height:2px;background:linear-gradient(90deg,var(--primary),transparent)}
    .timeline .step-card:last-child::after{display:none}
    .table-wrap{overflow:auto;border:1px solid var(--line);border-radius:18px;background:#fff}
    table{width:100%;border-collapse:collapse;min-width:760px}
    th,td{padding:14px 16px;border-bottom:1px solid #e8eff5;text-align:left;vertical-align:top}
    th{background:#f4fafc;font-size:14px}
    .highlight{color:#0b6a73;font-weight:800}
    .compare-badge{display:flex;gap:12px;flex-wrap:wrap;margin-top:12px}
    .score{padding:14px 16px;border-radius:16px;background:linear-gradient(135deg, rgba(24,168,184,.12), rgba(37,99,235,.08));border:1px solid #cfe7ed}
    .faq{display:grid;gap:10px}
    .faq-item button{width:100%;display:flex;justify-content:space-between;align-items:center;padding:18px 20px;border:0;background:transparent;color:var(--text);font:inherit;text-align:left;cursor:pointer}
    .faq-item .answer{display:none;padding:0 20px 18px;color:var(--muted)}
    .faq-item.active .answer{display:block}
    .faq-item .icon{transition:.25s ease}
    .faq-item.active .icon{transform:rotate(45deg)}
    .review-meta{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:10px}
    .stars{color:#f59e0b;letter-spacing:2px;font-size:15px}
    .case-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:14px}
    .case-list{display:grid;gap:12px}
    .case-item{padding:16px;border-radius:16px;background:#f8fcfd;border:1px solid var(--line)}
    .article-list{display:grid;gap:12px}
    .article-list a{display:flex;justify-content:space-between;gap:12px;padding:14px 16px;border-radius:14px;border:1px solid var(--line);background:#fff}
    .form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
    .form-grid .full{grid-column:1 / -1}
    input,select,textarea{width:100%;padding:13px 14px;border-radius:14px;border:1px solid #cfe0e9;background:#fff;color:var(--text);font:inherit;outline:none}
    textarea{min-height:120px;resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:var(--primary);box-shadow:0 0 0 4px rgba(24,168,184,.10)}
    .footer{margin-top:18px;padding:18px 0 26px;background:#0f2c3a;color:#d8edf4}
    .footer a{color:#dff8ff}
    .footer .muted{color:#a9c7d2}
    .footer-grid{display:grid;grid-template-columns:1.1fr .9fr .9fr;gap:18px}
    .footer small{color:#a9c7d2}
    .floating{position:fixed;right:16px;bottom:18px;z-index:50;display:grid;gap:10px}
    .float-btn{display:inline-flex;align-items:center;justify-content:center;width:48px;height:48px;border-radius:16px;background:linear-gradient(135deg,var(--primary),var(--primary2));color:#fff;box-shadow:0 12px 24px rgba(24,168,184,.25)}
    .float-card{position:fixed;right:16px;bottom:78px;width:min(280px, calc(100vw - 32px));background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);padding:14px;display:none;z-index:50}
    .float-card img{border-radius:12px;border:1px solid var(--line)}
    .show{display:block}
    .reveal{opacity:0;transform:translateY(16px);transition:.6s ease}
    .reveal.in{opacity:1;transform:none}
    .logo-row{display:flex;align-items:center;gap:14px;flex-wrap:wrap}
    .price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
    .price-card{padding:18px;border-radius:18px;background:linear-gradient(180deg,#ffffff,#f6fbfd);border:1px solid var(--line)}
    .price-card strong{font-size:22px}
    .map-like{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
    .network-item{padding:14px 16px;border:1px solid var(--line);border-radius:16px;background:#fff}
    @media (max-width: 980px){
      .hero-grid,.case-grid,.footer-grid,.grid-4,.grid-3,.grid-2,.timeline,.price-grid,.form-grid,.panel-grid{grid-template-columns:1fr}
      nav{display:none}
      nav.open{display:flex;flex-direction:column;align-items:flex-start;padding:12px 0 16px}
      .nav-toggle{display:inline-flex}
      .section-head{flex-direction:column;align-items:flex-start}
      .hero-points{grid-template-columns:1fr}
      .timeline .step-card::after{display:none}
    }