:root{
      --bg:#f6fbfa;
      --bg-2:#edf8f6;
      --card:#ffffff;
      --line:#dbe9e6;
      --text:#17323b;
      --muted:#5f7480;
      --brand:#0ea5a3;
      --brand-2:#3cc8d6;
      --accent:#0f7c8a;
      --shadow:0 18px 50px rgba(15, 124, 138, 0.10);
      --radius:22px;
      --radius-sm:16px;
      --max:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC","Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(60,200,214,.12), transparent 30%),
        radial-gradient(circle at right 20%, rgba(14,165,163,.10), transparent 26%),
        linear-gradient(180deg, #f7fcfb 0%, #f4fbfa 55%, #f7fbfb 100%);
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{max-width:var(--max);margin:0 auto;padding:0 20px}
    .topbar{
      position:sticky;top:0;z-index:50;
      backdrop-filter: blur(14px);
      background:rgba(246,251,250,.82);
      border-bottom:1px solid rgba(219,233,230,.85);
    }
    .nav{
      display:flex;align-items:center;justify-content:space-between;gap:16px;
      min-height:74px;
    }
    .brand{display:flex;align-items:center;gap:12px;min-width:0}
    .brand img{width:42px;height:42px;object-fit:contain}
    .brand strong{display:block;font-size:18px;line-height:1.1}
    .brand span{display:block;font-size:12px;color:var(--muted);margin-top:2px}
    .nav-links{display:flex;align-items:center;gap:18px;flex-wrap:wrap;justify-content:flex-end}
    .nav-links a{font-size:14px;color:#264652;padding:8px 0;position:relative}
    .nav-links a::after{
      content:"";position:absolute;left:0;bottom:0;width:0;height:2px;background:linear-gradient(90deg,var(--brand),var(--brand-2));transition:.25s ease;
    }
    .nav-links a:hover::after,.nav-links a:focus::after{width:100%}
    .nav-cta{display:flex;align-items:center;gap:10px}
    .btn{
      border:0;cursor:pointer;border-radius:999px;padding:12px 18px;font-weight:700;font-size:14px;
      transition:transform .2s ease, box-shadow .2s ease, background .2s ease, color .2s ease;
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
    }
    .btn:hover{transform:translateY(-1px)}
    .btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;box-shadow:0 12px 24px rgba(14,165,163,.22)}
    .btn-ghost{background:#fff;color:var(--accent);border:1px solid var(--line)}
    .menu-btn{display:none;background:#fff;border:1px solid var(--line);border-radius:14px;padding:10px 12px}
    .hero{
      padding:42px 0 26px;
    }
    .hero-grid{
      display:grid;grid-template-columns:1.2fr .8fr;gap:22px;align-items:stretch;
    }
    .hero-panel{
      background:linear-gradient(135deg, rgba(15,124,138,.08), rgba(60,200,214,.07) 50%, rgba(255,255,255,.92));
      border:1px solid rgba(219,233,230,.9);
      border-radius:28px;
      box-shadow:var(--shadow);
      overflow:hidden;
      position:relative;
    }
    .hero-main{padding:34px}
    .eyebrow{
      display:inline-flex;align-items:center;gap:8px;
      padding:8px 12px;border-radius:999px;
      background:rgba(14,165,163,.10);color:var(--accent);
      font-size:13px;font-weight:700;
    }
    h1{margin:18px 0 14px;font-size:clamp(30px, 5vw, 52px);line-height:1.08;letter-spacing:-.02em}
    .hero p{margin:0;color:var(--muted);font-size:16px;line-height:1.85;max-width:62ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}
    .hero-points{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:24px}
    .mini{
      background:rgba(255,255,255,.86);border:1px solid rgba(219,233,230,.9);border-radius:18px;padding:16px;
    }
    .mini b{display:block;font-size:18px;margin-bottom:6px}
    .mini span{font-size:13px;color:var(--muted);line-height:1.6}
    .hero-side{padding:24px}
    .stat-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
    .stat{
      background:linear-gradient(180deg,#fff, #f7fbfb);
      border:1px solid var(--line);
      border-radius:20px;padding:18px;min-height:112px;
    }
    .stat strong{display:block;font-size:28px;line-height:1.1;color:var(--accent)}
    .stat span{display:block;margin-top:10px;font-size:13px;color:var(--muted);line-height:1.5}
    .section{padding:18px 0 10px}
    .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);line-height:1.7;max-width:64ch}
    .card{
      background:rgba(255,255,255,.92);
      border:1px solid var(--line);
      border-radius:var(--radius);
      box-shadow:0 12px 30px rgba(23,50,59,.05);
    }
    .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
    .feature{padding:22px}
    .feature h3{margin:10px 0 8px;font-size:18px}
    .feature p{margin:0;color:var(--muted);line-height:1.75;font-size:14px}
    .icon{
      width:44px;height:44px;border-radius:14px;
      display:grid;place-items:center;
      background:linear-gradient(135deg, rgba(14,165,163,.14), rgba(60,200,214,.14));
      color:var(--accent);font-weight:900;
    }
    .chip-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .chip{padding:10px 14px;border-radius:999px;background:#fff;border:1px solid var(--line);font-size:13px;color:#244652}
    .steps{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .step{padding:20px;position:relative}
    .step .num{font-size:12px;font-weight:800;color:var(--brand);letter-spacing:.08em}
    .step h3{margin:12px 0 8px;font-size:17px}
    .step p{margin:0;color:var(--muted);font-size:14px;line-height:1.75}
    .compare-wrap{overflow:auto;border-radius:24px;border:1px solid var(--line);background:#fff}
    table{width:100%;border-collapse:collapse;min-width:860px}
    th,td{padding:16px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
    th{background:#f2fbfa;font-size:14px}
    td{font-size:14px;color:#244652;line-height:1.7}
    .score{
      display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;
      background:rgba(14,165,163,.10);color:var(--accent);font-weight:700;font-size:13px;
    }
    .quote{padding:22px}
    .quote p{margin:0;color:#2a4651;line-height:1.8;font-size:14px}
    .quote footer{margin-top:14px;font-size:13px;color:var(--muted)}
    .articles{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .article{padding:20px}
    .article time{display:block;color:var(--brand);font-size:12px;font-weight:800}
    .article h3{margin:10px 0 8px;font-size:17px}
    .article p{margin:0;color:var(--muted);line-height:1.75;font-size:14px}
    .images{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
    .image-card{padding:14px}
    .image-card img{width:100%;height:auto;border-radius:18px;border:1px solid var(--line)}
    .contact-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:16px;align-items:start}
    form{display:grid;gap:12px}
    input,select,textarea{
      width:100%;border:1px solid var(--line);border-radius:14px;padding:13px 14px;font:inherit;background:#fff;color:var(--text);
      outline:none;transition:border-color .2s ease, box-shadow .2s ease;
    }
    input:focus,select:focus,textarea:focus{border-color:rgba(14,165,163,.7);box-shadow:0 0 0 4px rgba(14,165,163,.10)}
    textarea{min-height:120px;resize:vertical}
    .form-row{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
    .footer{
      padding:18px 0 26px;margin-top:16px;border-top:1px solid var(--line);
      background:linear-gradient(180deg, rgba(255,255,255,.72), rgba(238,248,247,.9));
    }
    .footer-grid{display:grid;grid-template-columns:1.1fr .9fr .9fr;gap:16px}
    .footer h3{margin:0 0 12px;font-size:16px}
    .footer p,.footer li,.footer a{color:#35505a;font-size:14px;line-height:1.8}
    .footer ul{list-style:none;padding:0;margin:0;display:grid;gap:8px}
    .bottom{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;padding-top:14px;margin-top:14px;border-top:1px solid var(--line);color:#56707b;font-size:13px}
    .floating{
      position:fixed;right:16px;bottom:16px;z-index:60;display:grid;gap:10px;
    }
    .float-btn{
      width:52px;height:52px;border-radius:18px;border:1px solid var(--line);background:#fff;box-shadow:var(--shadow);
      display:grid;place-items:center;color:var(--accent);font-weight:900
    }
    .service-badge{
      display:inline-flex;align-items:center;gap:8px;padding:10px 12px;border-radius:14px;background:#fff;border:1px solid var(--line);margin:6px 8px 0 0;font-size:13px
    }
    details{
      background:#fff;border:1px solid var(--line);border-radius:18px;padding:16px 18px;
      box-shadow:0 8px 24px rgba(23,50,59,.04);
    }
    details summary{cursor:pointer;font-weight:700;list-style:none}
    details summary::-webkit-details-marker{display:none}
    details p{margin:12px 0 0;color:var(--muted);line-height:1.8;font-size:14px}
    .faq{display:grid;gap:12px}
    .timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .timeline .card{padding:18px}
    .tagline{display:flex;flex-wrap:wrap;gap:10px}
    .tagline .chip{background:linear-gradient(180deg,#fff,#f6fbfb)}
    .mobile-only{display:none}
    .scroll-animate{opacity:0;transform:translateY(18px);transition:opacity .7s ease, transform .7s ease}
    .scroll-animate.show{opacity:1;transform:none}
    @media (max-width: 1024px){
      .hero-grid,.contact-grid,.footer-grid,.grid-3,.articles,.images,.grid-2,.steps,.timeline{grid-template-columns:1fr 1fr}
      .hero-points{grid-template-columns:1fr}
    }
    @media (max-width: 780px){
      .nav-links,.nav-cta{display:none}
      .menu-btn{display:inline-flex}
      .mobile-only{display:block}
      .hero-grid,.contact-grid,.footer-grid,.grid-3,.articles,.images,.grid-2,.steps,.timeline,.form-row{grid-template-columns:1fr}
      .hero-main,.hero-side{padding:22px}
      .section-head{align-items:flex-start;flex-direction:column}
      .stat-grid{grid-template-columns:1fr 1fr}
      .nav-menu{
        display:none;position:absolute;left:20px;right:20px;top:74px;background:#fff;border:1px solid var(--line);
        border-radius:20px;box-shadow:var(--shadow);padding:16px;z-index:99
      }
      .nav-menu.open{display:block}
      .nav-menu a{display:block;padding:10px 0;border-bottom:1px solid #eef4f3}
      .nav-menu a:last-child{border-bottom:0}
    }