:root{
      --bg:#f7f8fb;
      --bg2:#eef3ff;
      --card:#ffffff;
      --text:#162033;
      --muted:#5f6c86;
      --line:#dbe3f2;
      --primary:#2f6bff;
      --primary2:#8b5cf6;
      --accent:#17b8a6;
      --warm:#ffb84d;
      --shadow:0 18px 40px rgba(27,43,78,.08);
      --radius:22px;
      --radius-sm:16px;
      --container:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
      background:
        radial-gradient(circle at 10% 10%, rgba(47,107,255,.09), transparent 26%),
        radial-gradient(circle at 90% 15%, rgba(139,92,246,.10), transparent 28%),
        radial-gradient(circle at 80% 80%, rgba(23,184,166,.08), transparent 26%),
        linear-gradient(180deg, #f8fbff 0%, #f5f7fb 40%, #f8fafc 100%);
      color:var(--text);
    }
    a{color:var(--primary);text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(var(--container), calc(100% - 32px)); margin:0 auto}
    .site-header{
      position:sticky;top:0;z-index:50;
      background:rgba(248,250,252,.82);
      backdrop-filter:blur(14px);
      border-bottom:1px solid rgba(219,227,242,.8);
    }
    .nav{
      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 .logo-wrap{
      width:42px;height:42px;border-radius:14px;background:#fff;border:1px solid var(--line);
      box-shadow:0 8px 18px rgba(47,107,255,.08);display:grid;place-items:center;overflow:hidden;
    }
    .brand-text{display:flex;flex-direction:column;line-height:1.15}
    .brand-text strong{font-size:15px;color:var(--text)}
    .brand-text span{font-size:12px;color:var(--muted)}
    .nav-toggle{
      display:none;border:1px solid var(--line);background:#fff;color:var(--text);
      border-radius:12px;padding:10px 12px;font-size:14px;
    }
    .nav-links{
      display:flex;align-items:center;gap:18px;flex-wrap:wrap;justify-content:flex-end;
    }
    .nav-links a{color:var(--text);font-size:14px}
    .nav-links a:hover{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-radius:14px;padding:12px 18px;border:1px solid transparent;font-weight:700;cursor:pointer;
      transition:.25s ease;white-space:nowrap
    }
    .btn:hover{transform:translateY(-1px);box-shadow:0 14px 28px rgba(47,107,255,.16)}
    .btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary2));color:#fff}
    .btn-ghost{background:#fff;color:var(--text);border-color:var(--line)}
    .hero{
      padding:34px 0 18px;
    }
    .hero-grid{
      display:grid;grid-template-columns:1.25fr .75fr;gap:22px;align-items:stretch;
    }
    .hero-main,.hero-side,.section-card,.info-card,.review-card,.faq-item,.article-card,.case-card,.flow-step,.metric,.compare-card,.tag-cloud,.price-card,.timeline-card,.form-card,.network-card,.help-card{
      background:rgba(255,255,255,.9);
      border:1px solid rgba(219,227,242,.9);
      border-radius:var(--radius);
      box-shadow:var(--shadow);
    }
    .hero-main{padding:30px;position:relative;overflow:hidden}
    .hero-main::after{
      content:"";position:absolute;inset:auto -40px -50px auto;width:220px;height:220px;border-radius:50%;
      background:radial-gradient(circle, rgba(47,107,255,.18), rgba(47,107,255,0) 68%);
      pointer-events:none;
    }
    .eyebrow{
      display:inline-flex;align-items:center;gap:8px;
      padding:8px 12px;border-radius:999px;background:#eef4ff;color:#2852c7;font-size:13px;font-weight:700;
    }
    h1{margin:16px 0 14px;font-size:clamp(30px,5vw,48px);line-height:1.1;letter-spacing:-.03em}
    .hero p{margin:0;color:var(--muted);font-size:16px;line-height:1.8}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin:22px 0 18px}
    .hero-points{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:22px}
    .mini-stat{
      padding:14px 16px;border-radius:18px;background:linear-gradient(180deg,#f8fbff,#f4f7ff);border:1px solid #e2e8f8;
    }
    .mini-stat strong{display:block;font-size:18px}
    .mini-stat span{display:block;font-size:13px;color:var(--muted);margin-top:4px}
    .hero-side{padding:22px;display:flex;flex-direction:column;gap:16px}
    .side-panel{padding:18px;border-radius:18px;background:linear-gradient(135deg,#f7fbff,#f3f1ff);border:1px solid #e3e8f6}
    .side-panel h3{margin:0 0 10px;font-size:18px}
    .side-panel ul{margin:0;padding-left:18px;color:var(--muted);line-height:1.9}
    .brand-strip{display:flex;flex-wrap:wrap;gap:8px}
    .chip{padding:8px 10px;border-radius:999px;background:#fff;border:1px solid var(--line);font-size:12px;color:var(--text)}
    section{padding:18px 0}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:18px;margin:0 0 14px}
    .section-head h2{margin:0;font-size:28px}
    .section-head p{margin:0;color:var(--muted);max-width:680px;line-height:1.7}
    .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}
    .metric,.flow-step,.case-card,.review-card,.faq-item,.article-card,.help-card,.price-card,.compare-card,.network-card,.tag-cloud,.timeline-card,.form-card{padding:20px}
    .metric strong{display:block;font-size:30px;line-height:1.1}
    .metric span{display:block;margin-top:8px;color:var(--muted);line-height:1.6}
    .icon{
      width:42px;height:42px;border-radius:14px;display:grid;place-items:center;margin-bottom:12px;
      background:linear-gradient(135deg,rgba(47,107,255,.12),rgba(139,92,246,.14));color:#214ed6;font-weight:800
    }
    .service-list,.bullet-list{margin:0;padding:0;list-style:none;display:grid;gap:10px}
    .service-list li,.bullet-list li{display:flex;gap:10px;align-items:flex-start;line-height:1.6;color:var(--text)}
    .service-list li::before,.bullet-list li::before{content:"";width:10px;height:10px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--accent));margin-top:8px;flex:0 0 auto}
    .service-list small,.bullet-list small{display:block;color:var(--muted)}
    .steps{counter-reset:step}
    .flow-step{position:relative}
    .flow-step::before{
      counter-increment:step;content:"0" counter(step);position:absolute;right:18px;top:18px;
      font-size:13px;font-weight:800;color:#9cb0db;
    }
    .flow-step h3{margin:0 0 10px}
    .flow-step p{margin:0;color:var(--muted);line-height:1.75}
    .table-wrap{overflow:auto;border-radius:18px;border:1px solid var(--line);background:#fff}
    table{width:100%;border-collapse:collapse;min-width:780px}
    th,td{padding:16px 14px;border-bottom:1px solid #edf1f8;text-align:left;vertical-align:top}
    th{background:#f7f9ff;color:#1f2f52;font-size:14px}
    td{color:var(--text);font-size:14px;line-height:1.7}
    .rating{display:inline-flex;gap:4px;color:#ffb84d;font-size:18px}
    .accordion{display:grid;gap:12px}
    .faq-item{padding:0;overflow:hidden}
    .faq-q{
      width:100%;padding:18px 20px;background:transparent;border:0;color:var(--text);font-size:16px;font-weight:700;
      display:flex;justify-content:space-between;align-items:center;cursor:pointer;text-align:left
    }
    .faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease;padding:0 20px;color:var(--muted);line-height:1.8}
    .faq-item.active .faq-a{padding-bottom:18px;max-height:180px}
    .faq-item.active .faq-q .plus{transform:rotate(45deg)}
    .plus{transition:transform .25s ease;font-size:22px;color:var(--primary)}
    .review-meta{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:10px}
    .review-card p{margin:0;color:var(--muted);line-height:1.8}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag-cloud .chip{background:linear-gradient(180deg,#fff,#f5f8ff)}
    .case-card h3,.article-card h3,.help-card h3,.price-card h3,.network-card h3,.compare-card h3,.form-card h3,.timeline-card h3{margin:0 0 10px}
    .case-card p,.article-card p,.help-card p,.price-card p,.network-card p,.compare-card p,.form-card p,.timeline-card p{margin:0;color:var(--muted);line-height:1.75}
    .case-card .foot,.article-card .foot,.help-card .foot{margin-top:14px;display:flex;justify-content:space-between;gap:10px;color:var(--muted);font-size:13px}
    .form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
    .field{display:flex;flex-direction:column;gap:8px}
    label{font-size:14px;font-weight:700;color:var(--text)}
    input,select,textarea{
      width:100%;border-radius:14px;border:1px solid var(--line);background:#fff;color:var(--text);
      padding:13px 14px;font:inherit;outline:none;transition:border-color .2s,box-shadow .2s
    }
    input:focus,select:focus,textarea:focus{border-color:#97b3ff;box-shadow:0 0 0 4px rgba(47,107,255,.12)}
    textarea{min-height:120px;resize:vertical}
    .form-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:14px}
    .footer{
      margin-top:18px;padding:28px 0 36px;border-top:1px solid var(--line);background:linear-gradient(180deg,#f8fbff,#f3f6fc);
      color:var(--text)
    }
    .footer a{color:var(--primary)}
    .footer-grid{display:grid;grid-template-columns:1.1fr .9fr .9fr;gap:16px}
    .footer small,.footer p,.footer li{color:var(--muted);line-height:1.8}
    .footer ul{list-style:none;padding:0;margin:0;display:grid;gap:8px}
    .float-tools{
      position:fixed;right:16px;bottom:16px;z-index:60;display:flex;flex-direction:column;gap:10px
    }
    .float-btn{
      width:48px;height:48px;border-radius:16px;border:1px solid rgba(219,227,242,.95);background:#fff;
      display:grid;place-items:center;box-shadow:var(--shadow);cursor:pointer;color:var(--text)
    }
    .kefu-box{
      position:fixed;left:16px;bottom:16px;z-index:60;width:260px;max-width:calc(100vw - 32px);
      background:#fff;border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow);padding:14px;display:none
    }
    .kefu-box.show{display:block}
    .kefu-box .top{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-bottom:10px}
    .kefu-box h4{margin:0;font-size:16px}
    .kefu-box p{margin:8px 0 0;color:var(--muted);font-size:13px;line-height:1.6}
    .kefu-box img{border-radius:14px;border:1px solid var(--line);width:100%;height:auto}
    .scroll-reveal{opacity:0;transform:translateY(12px);transition:.6s ease}
    .scroll-reveal.in-view{opacity:1;transform:none}
    .compare-highlight{color:#0d3ddf;font-weight:800}
    .money{font-size:24px;font-weight:800;color:#173a86}
    .news-list{display:grid;gap:10px}
    .news-item{padding:14px 16px;border-radius:16px;background:#fff;border:1px solid var(--line);display:flex;justify-content:space-between;gap:12px;align-items:center}
    .news-item span{color:var(--muted);font-size:13px}
    .mobile-only{display:none}
    @media (max-width: 980px){
      .hero-grid,.grid-4,.grid-3,.grid-2,.footer-grid{grid-template-columns:1fr}
      .nav-toggle{display:inline-flex}
      .nav-links,.nav-cta{display:none}
      .nav-links.open{display:flex;flex-direction:column;align-items:flex-start;gap:12px;padding:14px 0}
      .nav-wrap{width:100%}
      .nav{flex-wrap:wrap}
      .hero-points{grid-template-columns:1fr}
      .section-head{align-items:flex-start;flex-direction:column}
      .form-grid{grid-template-columns:1fr}
      .mobile-only{display:block}
    }
    @media (max-width: 640px){
      .container{width:min(var(--container), calc(100% - 24px))}
      .hero-main,.hero-side,.metric,.flow-step,.case-card,.review-card,.faq-item,.article-card,.help-card,.price-card,.compare-card,.network-card,.tag-cloud,.timeline-card,.form-card{padding:18px}
      h1{font-size:28px}
      .section-head h2{font-size:24px}
      .btn{width:100%}
      .hero-actions .btn{width:auto;flex:1}
      .float-tools{right:10px;bottom:10px}
      .kefu-box{left:12px;bottom:72px}
    }