:root{
      --bg:#f4fbfd;
      --bg-2:#eaf8fb;
      --card:#ffffff;
      --card-2:#f8fcfd;
      --text:#17313b;
      --muted:#5b717a;
      --line:#d8eaef;
      --brand:#0ea5a8;
      --brand-2:#1b78d1;
      --brand-3:#15c0a6;
      --shadow:0 18px 40px rgba(16, 70, 86, .08);
      --radius:22px;
      --max: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 20% 0%, rgba(14,165,168,.10), transparent 28%),
        radial-gradient(circle at 95% 10%, rgba(27,120,209,.10), transparent 26%),
        linear-gradient(180deg, #f8fdfe 0%, #f4fbfd 42%, #eef8fa 100%);
      line-height:1.7;
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(calc(100% - 32px), var(--max)); margin:0 auto}
    .site-header{
      position:sticky;top:0;z-index:50;
      backdrop-filter: blur(18px);
      background: rgba(244,251,253,.82);
      border-bottom:1px solid rgba(216,234,239,.9);
    }
    .header-inner{
      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 img{width:44px;height:44px;object-fit:contain;border-radius:12px;background:#fff;border:1px solid var(--line);box-shadow:0 8px 24px rgba(0,0,0,.05)}
    .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)}
    .nav-toggle{
      display:none;border:1px solid var(--line);background:#fff;color:var(--text);
      padding:10px 12px;border-radius:12px
    }
    .nav{
      display:flex;align-items:center;gap:18px;flex-wrap:wrap;justify-content:flex-end
    }
    .nav a{
      font-size:14px;color:#29444e;padding:8px 10px;border-radius:999px;transition:.25s ease
    }
    .nav a:hover{background:#e9f7fb;color:#0f6070}
    .hero{
      padding:28px 0 18px;
    }
    .hero-grid{
      display:grid;grid-template-columns:1.15fr .85fr;gap:22px;align-items:stretch
    }
    .hero-main,.hero-side,.panel,.card,.info-box,.faq-item,.testimonial,.article-item,.compare-card,.form-card,.stat,.step,.tag-cloud,.price-box,.timeline-item{
      background:rgba(255,255,255,.9);
      border:1px solid rgba(216,234,239,.95);
      border-radius:var(--radius);
      box-shadow:var(--shadow)
    }
    .hero-main{padding:34px}
    .eyebrow{
      display:inline-flex;align-items:center;gap:8px;
      background:linear-gradient(90deg, rgba(14,165,168,.12), rgba(27,120,209,.12));
      color:#12656f;border:1px solid rgba(14,165,168,.15);
      padding:8px 14px;border-radius:999px;font-size:13px;font-weight:600
    }
    h1{margin:14px 0 14px;font-size:clamp(30px, 5vw, 52px);line-height:1.1}
    .lead{margin:0;color:var(--muted);font-size:16px;max-width:62ch}
    .hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin:24px 0 18px}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      padding:13px 18px;border-radius:14px;border:1px solid transparent;font-weight:700;
      transition:.25s ease;cursor:pointer;min-height:48px
    }
    .btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;box-shadow:0 16px 28px rgba(14,165,168,.22)}
    .btn-primary:hover{transform:translateY(-2px);box-shadow:0 20px 34px rgba(14,165,168,.28)}
    .btn-secondary{background:#fff;color:#195260;border-color:var(--line)}
    .btn-secondary:hover{transform:translateY(-2px);border-color:#b9dde5}
    .hero-points{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:18px}
    .mini{
      padding:14px 15px;border-radius:16px;background:linear-gradient(180deg,#fff, #f8fcfd);border:1px solid var(--line)
    }
    .mini strong{display:block;font-size:18px}
    .mini span{display:block;font-size:13px;color:var(--muted)}
    .hero-side{padding:22px;display:grid;gap:14px}
    .side-top{
      padding:18px;border-radius:18px;background:linear-gradient(135deg, rgba(14,165,168,.10), rgba(27,120,209,.09));
      border:1px solid rgba(27,120,209,.12)
    }
    .side-top h2{margin:0 0 8px;font-size:22px}
    .side-top p{margin:0;color:var(--muted)}
    .chip-row{display:flex;flex-wrap:wrap;gap:10px}
    .chip{padding:8px 12px;border-radius:999px;background:#f2fbfc;border:1px solid var(--line);font-size:13px;color:#24515b}
    .hero-stat-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
    section{padding:16px 0}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:16px;margin:0 0 16px}
    .section-head h2{margin:0;font-size:28px}
    .section-head p{margin:0;color:var(--muted);max-width:62ch}
    .grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
    .grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
    .grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
    .stat,.card,.step,.testimonial,.article-item,.compare-card,.form-card,.panel,.info-box,.faq-item,.price-box,.timeline-item{padding:20px}
    .stat strong{display:block;font-size:26px}
    .stat span,.card p,.step p,.testimonial p,.article-item p,.timeline-item p,.price-box p,.info-box p{color:var(--muted);margin:8px 0 0}
    .icon{
      width:42px;height:42px;border-radius:14px;display:grid;place-items:center;
      background:linear-gradient(135deg, rgba(14,165,168,.14), rgba(27,120,209,.14));
      color:#0d6870;font-weight:800;margin-bottom:12px
    }
    .card h3,.step h3,.testimonial h3,.article-item h3,.compare-card h3,.form-card h3,.price-box h3,.timeline-item h3{margin:0 0 8px;font-size:18px}
    .card:hover,.step:hover,.testimonial:hover,.article-item:hover,.compare-card:hover,.price-box:hover,.timeline-item:hover{transform:translateY(-3px);transition:.25s ease;box-shadow:0 22px 44px rgba(16,70,86,.1)}
    .service-list{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
    .step-list{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
    .timeline{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
    .tag-cloud{padding:18px;display:flex;flex-wrap:wrap;gap:10px}
    .tag-cloud a,.tag-cloud span,.faq-meta{
      padding:8px 12px;border-radius:999px;background:#f7fcfd;border:1px solid var(--line);font-size:13px;color:#24515b
    }
    .table-wrap{overflow:auto;border-radius:20px;border:1px solid var(--line);background:#fff}
    table{width:100%;border-collapse:collapse;min-width:760px}
    th,td{padding:16px 14px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
    th{background:#f3fbfd;color:#1d3f48;font-size:14px}
    tr:last-child td{border-bottom:none}
    .highlight{color:#0a7280;font-weight:700}
    .faq-item{padding:0;overflow:hidden}
    .faq-q{
      width:100%;border:none;background:transparent;color:var(--text);text-align:left;
      padding:18px 20px;font-size:16px;font-weight:700;display:flex;justify-content:space-between;gap:16px;cursor:pointer
    }
    .faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease;padding:0 20px}
    .faq-item.active .faq-a{max-height:180px;padding-bottom:18px}
    .faq-item.active .faq-q .plus{transform:rotate(45deg)}
    .plus{transition:.25s ease;font-size:20px;color:#11656f}
    .testimonial .meta{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:10px}
    .stars{color:#f59e0b;letter-spacing:1px}
    .articles{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
    .article-item small,.timeline-item small{display:block;color:#7a8f96}
    .form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
    label{display:block;font-size:14px;font-weight:600;margin-bottom:8px;color:#28454f}
    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:.2s ease
    }
    input:focus,select:focus,textarea:focus{border-color:#6bbecd;box-shadow:0 0 0 4px rgba(14,165,168,.10)}
    textarea{min-height:130px;resize:vertical}
    .form-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:14px}
    .footer{
      margin-top:10px;padding:24px 0 28px;border-top:1px solid rgba(216,234,239,.9);
      background:linear-gradient(180deg, rgba(255,255,255,.55), rgba(234,248,251,.75));
      color:var(--text)
    }
    .footer-grid{display:grid;grid-template-columns:1.2fr .8fr .9fr;gap:18px;align-items:start}
    .footer a{color:#174e5c}
    .footer a:hover{text-decoration:underline}
    .kefu{
      position:fixed;right:18px;bottom:18px;z-index:60;display:grid;gap:10px
    }
    .kefu .float-btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      padding:12px 14px;border-radius:999px;background:linear-gradient(135deg,var(--brand),var(--brand-2));
      color:#fff;box-shadow:0 16px 28px rgba(14,165,168,.24)
    }
    .to-top{
      position:fixed;left:18px;bottom:18px;z-index:60;border:none;border-radius:999px;padding:12px 14px;
      background:#fff;color:#185562;border:1px solid var(--line);box-shadow:var(--shadow);cursor:pointer;display:none
    }
    .mobile-only{display:none}
    .hero-side .logo-block{display:flex;align-items:center;gap:12px}
    .hero-side .logo-block img{width:52px;height:52px;object-fit:contain;border-radius:14px;background:#fff;border:1px solid var(--line)}
    .note{font-size:13px;color:var(--muted)}
    .comparison-badge{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;background:#ecfbfd;border:1px solid #ccecf0;color:#0f6670;font-size:13px;font-weight:700}
    @media (max-width: 980px){
      .hero-grid,.grid-4,.grid-3,.grid-2,.service-list,.step-list,.timeline,.articles,.footer-grid{grid-template-columns:1fr 1fr}
      .hero-main{padding:26px}
      .nav-toggle{display:inline-flex}
      .nav{
        position:absolute;left:16px;right:16px;top:68px;display:none;flex-direction:column;align-items:stretch;
        padding:14px;background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow)
      }
      .nav.show{display:flex}
      .nav a{padding:12px 14px}
    }
    @media (max-width: 720px){
      .hero-grid,.grid-4,.grid-3,.grid-2,.service-list,.step-list,.timeline,.articles,.footer-grid,.form-grid,.hero-stat-grid,.hero-points{grid-template-columns:1fr}
      .header-inner{position:relative}
      .hero{padding-top:20px}
      .hero-main,.hero-side,.stat,.card,.step,.testimonial,.article-item,.compare-card,.form-card,.panel,.info-box,.faq-item,.price-box,.timeline-item{padding:18px}
      h1{font-size:30px}
      .section-head{flex-direction:column;align-items:flex-start}
      .mobile-only{display:block}
      .desktop-only{display:none}
      .kefu{right:12px;bottom:12px}
      .to-top{left:12px;bottom:12px}
    }
    .reveal{opacity:0;transform:translateY(18px);transition:.55s ease}
    .reveal.show{opacity:1;transform:none}