:root{
      --bg:#f6f9fc;
      --panel:#ffffff;
      --panel-soft:#f2f7ff;
      --line:#dbe7f4;
      --text:#17324d;
      --muted:#5f7286;
      --primary:#1b78ff;
      --primary-2:#2ed0b4;
      --accent:#ffb84d;
      --shadow:0 18px 40px rgba(25, 58, 96, .08);
      --shadow2:0 10px 24px rgba(25, 58, 96, .12);
      --radius:20px;
      --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(27,120,255,.10), transparent 35%),
        radial-gradient(circle at top right, rgba(46,208,180,.10), transparent 30%),
        linear-gradient(180deg, #fafdff 0%, #f6f9fc 38%, #f4f8fb 100%);
    }
    a{color:inherit;text-decoration:none}
    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;
      backdrop-filter: blur(14px);
      background:rgba(246,249,252,.88);
      border-bottom:1px solid rgba(219,231,244,.8);
    }
    .nav{
      display:flex;align-items:center;justify-content:space-between;gap:18px;
      padding:14px 0;
    }
    .brand{display:flex;align-items:center;gap:12px;min-width:0}
    .brand img{width:44px;height:44px;object-fit:contain}
    .brand h1,.brand .brand-title{font-size:18px;line-height:1.1;margin:0;font-weight:800}
    .brand small{display:block;color:var(--muted);font-size:12px;margin-top:4px}
    .menu-toggle{
      display:none;border:1px solid var(--line);background:#fff;color:var(--text);
      border-radius:12px;padding:10px 12px;cursor:pointer;
      box-shadow:0 6px 16px rgba(25,58,96,.06)
    }
    .nav-links{display:flex;align-items:center;gap:16px;flex-wrap:wrap;justify-content:flex-end}
    .nav-links a{font-size:14px;color:#2b4b68;padding:8px 10px;border-radius:999px}
    .nav-links a:hover{background:rgba(27,120,255,.08);color:var(--primary)}
    .nav-cta{display:flex;gap:10px;align-items:center}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      border:1px solid transparent;border-radius:14px;padding:12px 16px;
      font-weight:700;transition:.22s ease;cursor:pointer;white-space:nowrap
    }
    .btn-primary{background:linear-gradient(135deg,var(--primary),#4b8cff);color:#fff;box-shadow:0 12px 24px rgba(27,120,255,.22)}
    .btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 26px rgba(27,120,255,.26)}
    .btn-ghost{background:#fff;border-color:var(--line);color:var(--text)}
    .btn-ghost:hover{transform:translateY(-2px);box-shadow:var(--shadow2)}
    .hero{padding:34px 0 12px}
    .hero-grid{
      display:grid;grid-template-columns:1.25fr .85fr;gap:20px;align-items:stretch
    }
    .hero-main,.hero-side,.section-card,.info-card,.quote-card,.faq-item,.form-card,.article-card,.case-card,.compare-card{
      background:var(--panel);border:1px solid rgba(219,231,244,.9);border-radius:var(--radius);box-shadow:var(--shadow)
    }
    .hero-main{padding:34px;position:relative;overflow:hidden}
    .hero-main:before,.hero-main:after{
      content:"";position:absolute;border-radius:50%;pointer-events:none;
      background:radial-gradient(circle, rgba(27,120,255,.14), transparent 62%);
      width:280px;height:280px;right:-90px;top:-80px
    }
    .hero-main:after{width:180px;height:180px;right:18%;top:auto;bottom:-60px;background:radial-gradient(circle, rgba(46,208,180,.16), transparent 62%)}
    .eyebrow{
      display:inline-flex;align-items:center;gap:8px;
      background:rgba(27,120,255,.08);color:var(--primary);
      border:1px solid rgba(27,120,255,.16);padding:8px 12px;border-radius:999px;
      font-size:13px;font-weight:700
    }
    .hero h2{font-size:clamp(30px,4vw,50px);line-height:1.08;margin:18px 0 14px}
    .hero p{margin:0;color:var(--muted);line-height:1.8;font-size:15px;max-width:62ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
    .hero-meta{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:24px}
    .meta-box{background:linear-gradient(180deg,#fff, #f7fbff);border:1px solid var(--line);border-radius:16px;padding:14px 16px}
    .meta-box strong{display:block;font-size:18px;margin-bottom:4px}
    .meta-box span{font-size:13px;color:var(--muted);line-height:1.5}
    .hero-side{padding:22px;display:flex;flex-direction:column;gap:14px;background:linear-gradient(180deg,#ffffff,#f7fbff)}
    .side-card{border-radius:18px;padding:18px;background:linear-gradient(135deg, rgba(27,120,255,.07), rgba(46,208,180,.08));border:1px solid rgba(27,120,255,.12)}
    .side-card h3{margin:0 0 8px;font-size:18px}
    .side-card p{margin:0;color:var(--muted);line-height:1.7;font-size:14px}
    .chip-cloud{display:flex;flex-wrap:wrap;gap:8px}
    .chip{padding:8px 11px;border-radius:999px;background:#fff;border:1px solid var(--line);font-size:13px;color:#29506f}
    .grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .section{padding:18px 0}
    .section-card{padding:24px}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:18px}
    .section-head h2{margin:0;font-size:26px}
    .section-head p{margin:0;color:var(--muted);line-height:1.7;max-width:68ch;font-size:14px}
    .info-card{padding:18px}
    .info-card h3{margin:10px 0 8px;font-size:18px}
    .info-card p{margin:0;color:var(--muted);line-height:1.7;font-size:14px}
    .icon{
      width:42px;height:42px;border-radius:14px;display:grid;place-items:center;
      background:linear-gradient(135deg, rgba(27,120,255,.14), rgba(46,208,180,.16));
      color:var(--primary);font-weight:900
    }
    .list{display:grid;gap:10px;margin:0;padding:0;list-style:none}
    .list li{display:flex;gap:10px;align-items:flex-start;color:#28465e;line-height:1.7;font-size:14px}
    .check{flex:0 0 auto;width:20px;height:20px;border-radius:50%;background:rgba(46,208,180,.14);color:#0d8f73;display:grid;place-items:center;font-size:12px;margin-top:2px}
    .scroll-x{overflow-x:auto}
    .table{
      width:100%;border-collapse:separate;border-spacing:0;min-width:860px;overflow:hidden
    }
    .table th,.table td{
      padding:14px 14px;border-bottom:1px solid var(--line);vertical-align:top;text-align:left;font-size:14px
    }
    .table th{background:#f3f8ff;color:#25445d;font-size:13px}
    .table tr:first-child th:first-child{border-top-left-radius:14px}
    .table tr:first-child th:last-child{border-top-right-radius:14px}
    .pill{
      display:inline-flex;align-items:center;gap:6px;padding:6px 10px;border-radius:999px;
      background:rgba(27,120,255,.08);color:var(--primary);font-size:12px;font-weight:700
    }
    .steps{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .step{
      padding:18px;border-radius:18px;background:linear-gradient(180deg,#fff,#f8fbff);
      border:1px solid var(--line);position:relative
    }
    .step .num{font-weight:900;color:var(--primary);font-size:13px}
    .step h3{margin:10px 0 8px;font-size:17px}
    .step p{margin:0;color:var(--muted);line-height:1.7;font-size:14px}
    .tag-grid{display:flex;flex-wrap:wrap;gap:10px}
    .tag-grid span{border:1px solid var(--line);background:#fff;border-radius:999px;padding:9px 12px;font-size:13px;color:#33536e}
    .review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .quote-card{padding:20px}
    .quote-top{display:flex;justify-content:space-between;gap:10px;align-items:center;margin-bottom:12px}
    .stars{color:#ffb400;letter-spacing:1px}
    .quote-card p{margin:0;color:#344f66;line-height:1.8;font-size:14px}
    .quote-card footer{margin-top:14px;color:var(--muted);font-size:13px}
    .case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .case-card{overflow:hidden}
    .case-img{aspect-ratio:16/10;background:#eef5ff;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:center}
    .case-body{padding:18px}
    .case-body h3{margin:0 0 8px;font-size:18px}
    .case-body p{margin:0;color:var(--muted);line-height:1.7;font-size:14px}
    .article-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
    .article-card{padding:18px}
    .article-card h3{margin:10px 0 8px;font-size:18px}
    .article-card p{margin:0;color:var(--muted);line-height:1.7;font-size:14px}
    .article-card a{display:inline-flex;margin-top:12px;color:var(--primary);font-weight:700}
    .faq{display:grid;gap:12px}
    .faq-item{overflow:hidden}
    .faq-q{
      width:100%;border:0;background:transparent;padding:18px 18px;display:flex;justify-content:space-between;gap:14px;align-items:center;
      color:var(--text);font-size:15px;font-weight:800;cursor:pointer;text-align:left
    }
    .faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease;padding:0 18px}
    .faq-item.open .faq-a{max-height:220px;padding-bottom:16px}
    .faq-a p{margin:0;color:var(--muted);line-height:1.8;font-size:14px}
    .form-card{padding:22px}
    .form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    .field{display:flex;flex-direction:column;gap:8px}
    .field label{font-size:13px;font-weight:700;color:#2c4a64}
    .field input,.field select,.field textarea{
      width:100%;border:1px solid var(--line);border-radius:14px;background:#fff;color:var(--text);
      padding:12px 14px;font:inherit;outline:none;transition:.2s ease
    }
    .field textarea{min-height:120px;resize:vertical}
    .field input:focus,.field select:focus,.field textarea:focus{border-color:rgba(27,120,255,.5);box-shadow:0 0 0 4px rgba(27,120,255,.08)}
    .span-2{grid-column:span 2}
    .footer{
      margin-top:18px;padding:24px 0 30px;border-top:1px solid rgba(219,231,244,.95);
      background:linear-gradient(180deg, rgba(255,255,255,.6), rgba(246,249,252,.95));
      color:#28465e
    }
    .footer-grid{display:grid;grid-template-columns:1.1fr .9fr .9fr;gap:18px}
    .footer h3{margin:0 0 12px;font-size:16px}
    .footer p,.footer a,.footer li{color:#38546d;font-size:14px;line-height:1.8}
    .footer a:hover{color:var(--primary)}
    .footer .mini-links{display:flex;flex-wrap:wrap;gap:10px}
    .footer .mini-links a{padding:8px 10px;border-radius:999px;background:#fff;border:1px solid var(--line)}
    .copyright{margin-top:20px;padding-top:14px;border-top:1px solid var(--line);font-size:13px;color:#5f7286}
    .floating{
      position:fixed;right:16px;bottom:16px;z-index:50;display:flex;flex-direction:column;gap:10px
    }
    .float-btn{
      width:54px;height:54px;border-radius:18px;border:1px solid rgba(219,231,244,.95);background:#fff;
      display:grid;place-items:center;box-shadow:var(--shadow2);cursor:pointer;color:var(--primary);font-size:20px
    }
    .backtop{opacity:0;pointer-events:none;transform:translateY(10px);transition:.22s ease}
    .backtop.show{opacity:1;pointer-events:auto;transform:translateY(0)}
    .客服{
      position:fixed;left:16px;bottom:16px;z-index:50
    }
    .kefu-pop{
      display:none;position:absolute;left:0;bottom:66px;width:260px;background:#fff;border:1px solid var(--line);
      border-radius:18px;box-shadow:var(--shadow2);padding:14px
    }
    .kefu-pop img{width:100%;border-radius:14px}
    .kefu-pop p{margin:10px 0 0;font-size:13px;color:var(--muted);line-height:1.7}
    .客服:hover .kefu-pop,.客服:focus-within .kefu-pop{display:block}
    .mobile-only{display:none}
    .timeline{display:grid;gap:12px}
    .timeline-item{display:grid;grid-template-columns:90px 1fr;gap:14px;padding:16px;border:1px solid var(--line);border-radius:18px;background:#fff}
    .timeline-item strong{color:var(--primary)}
    .timeline-item p{margin:0;color:var(--muted);line-height:1.7;font-size:14px}
    .compare-card{padding:18px}
    .compare-score{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:10px}
    .score{font-size:32px;font-weight:900;color:var(--primary)}
    .reveal{opacity:0;transform:translateY(16px);transition:.6s ease}
    .reveal.in{opacity:1;transform:none}
    @media (max-width: 980px){
      .hero-grid,.grid-4,.steps,.review-grid,.case-grid,.article-grid,.footer-grid{grid-template-columns:1fr 1fr}
      .hero-main{padding:26px}
      .hero-meta{grid-template-columns:1fr}
    }
    @media (max-width: 720px){
      .menu-toggle{display:inline-flex}
      .nav{flex-wrap:wrap}
      .nav-links{
        display:none;width:100%;padding-top:8px;flex-direction:column;align-items:stretch;gap:6px
      }
      .nav-links.open{display:flex}
      .nav-links a{padding:12px 12px;background:#fff;border:1px solid var(--line)}
      .nav-cta{width:100%;justify-content:space-between}
      .hero-grid,.grid-4,.steps,.review-grid,.case-grid,.article-grid,.footer-grid,.form-grid,.timeline-item{grid-template-columns:1fr}
      .section-head{flex-direction:column;align-items:flex-start}
      .span-2{grid-column:span 1}
      .mobile-only{display:block}
      .desktop-only{display:none}
      .hero{padding-top:18px}
      .hero-main{padding:22px}
      .hero h2{font-size:30px}
      .compare-card,.section-card,.form-card{padding:18px}
    }