:root{
      --bg:#f5f7fb;
      --surface:#ffffff;
      --surface-2:#f0f4ff;
      --text:#183048;
      --muted:#5e6f86;
      --line:#dbe4f0;
      --primary:#2563eb;
      --primary-2:#7c3aed;
      --accent:#0ea5e9;
      --warm:#f59e0b;
      --success:#16a34a;
      --shadow:0 18px 45px rgba(20,40,80,.10);
      --radius:22px;
      --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(37,99,235,.10), transparent 28%),
        radial-gradient(circle at top right, rgba(124,58,237,.10), transparent 24%),
        linear-gradient(180deg, #f8fbff 0%, #f5f7fb 35%, #f8fafc 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:50;
      backdrop-filter:blur(14px);
      background:rgba(245,247,251,.84);
      border-bottom:1px solid rgba(219,228,240,.8);
    }
    .nav{
      display:flex;align-items:center;justify-content:space-between;gap:18px;
      min-height:76px;
    }
    .brand{display:flex;align-items:center;gap:12px;min-width:0}
    .brand img{width:44px;height:44px;object-fit:contain}
    .brand-text{display:flex;flex-direction:column;line-height:1.1}
    .brand-text strong{font-size:18px}
    .brand-text span{font-size:12px;color:var(--muted)}
    .nav-links{display:flex;flex-wrap:wrap;gap:14px;align-items:center;justify-content:flex-end}
    .nav-links a{font-size:14px;color:var(--muted);padding:10px 12px;border-radius:999px;transition:.2s}
    .nav-links a:hover{color:var(--text);background:rgba(37,99,235,.08)}
    .nav-cta{display:flex;align-items:center;gap:10px}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      border:1px solid transparent;border-radius:999px;
      padding:12px 18px;font-weight:700;font-size:14px;
      transition:.2s ease;cursor:pointer;white-space:nowrap;
    }
    .btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary-2));color:#fff;box-shadow:0 12px 28px rgba(37,99,235,.22)}
    .btn-primary:hover{transform:translateY(-1px);box-shadow:0 16px 34px rgba(37,99,235,.26)}
    .btn-ghost{background:#fff;color:var(--text);border-color:var(--line)}
    .btn-ghost:hover{transform:translateY(-1px);border-color:#b7c7df}
    .menu-btn{display:none;background:#fff;border:1px solid var(--line);border-radius:14px;padding:10px 12px}
    .hero{
      position:relative;overflow:hidden;
      padding:42px 0 22px;
    }
    .hero::before{
      content:"";position:absolute;inset:0;
      background:
        linear-gradient(135deg, rgba(37,99,235,.08), transparent 34%),
        linear-gradient(315deg, rgba(124,58,237,.08), transparent 35%);
      pointer-events:none;
    }
    .hero-grid{
      position:relative;
      display:grid;grid-template-columns:1.25fr .75fr;gap:24px;align-items:stretch;
    }
    .hero-main,.hero-side,.panel,.card,.faq-item,.review,.article,.timeline-item,.price-card,.network,.compare-card,.form-card{
      background:rgba(255,255,255,.88);
      border:1px solid rgba(219,228,240,.85);
      border-radius:var(--radius);
      box-shadow:var(--shadow);
    }
    .hero-main{padding:34px}
    .kicker{display:inline-flex;align-items:center;gap:8px;background:rgba(37,99,235,.08);color:var(--primary);padding:8px 14px;border-radius:999px;font-size:13px;font-weight:700}
    h1{margin:18px 0 14px;font-size:clamp(32px,5vw,54px);line-height:1.06;letter-spacing:-.03em}
    .lead{margin:0;color:var(--muted);font-size:17px;line-height:1.82;max-width:62ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
    .hero-points{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin-top:28px}
    .point{padding:16px;border-radius:18px;background:linear-gradient(180deg,#fff, #f6f9ff);border:1px solid var(--line)}
    .point strong{display:block;font-size:20px;margin-bottom:4px}
    .point span{color:var(--muted);font-size:13px;line-height:1.6}
    .hero-side{padding:22px;display:grid;gap:14px}
    .mini{
      padding:16px;border-radius:18px;background:linear-gradient(135deg, rgba(37,99,235,.08), rgba(124,58,237,.08));
      border:1px solid rgba(37,99,235,.12);
    }
    .mini h3,.section-title h2{margin:0 0 8px}
    .mini p{margin:0;color:var(--muted);font-size:14px;line-height:1.75}
    .quick-links{display:flex;flex-wrap:wrap;gap:10px;margin-top:12px}
    .tag{display:inline-flex;align-items:center;padding:8px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);font-size:13px;color:var(--text)}
    .section{padding:28px 0}
    .section-title{display:flex;justify-content:space-between;align-items:end;gap:18px;margin-bottom:18px}
    .section-title p{margin:0;color:var(--muted);max-width:62ch;line-height:1.75}
    h2{font-size:clamp(24px,3vw,36px);line-height:1.16}
    .grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
    .grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
    .card,.panel,.review,.article,.price-card,.network,.compare-card,.form-card{padding:22px}
    .metric{display:flex;flex-direction:column;gap:8px}
    .metric strong{font-size:30px;line-height:1}
    .metric span{color:var(--muted);font-size:14px}
    .card h3,.review h3,.article h3,.price-card h3,.network h3,.compare-card h3{margin:0 0 10px;font-size:18px}
    .card p,.review p,.article p,.price-card p,.network p,.compare-card p{margin:0;color:var(--muted);line-height:1.76}
    .pill-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
    .pill{padding:7px 10px;border-radius:999px;background:var(--surface-2);font-size:12px;color:#31506f;border:1px solid #d9e5ff}
    .compare-wrap{overflow:auto;border-radius:22px;border:1px solid var(--line);background:#fff}
    table{width:100%;border-collapse:collapse;min-width:860px}
    th,td{padding:16px 14px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
    th{background:#f7faff;font-size:14px;color:#35526e}
    td{font-size:14px;color:var(--text);line-height:1.7}
    .badge{display:inline-flex;align-items:center;border-radius:999px;padding:6px 10px;font-size:12px;font-weight:700}
    .badge.good{background:rgba(22,163,74,.1);color:#166534}
    .badge.mid{background:rgba(245,158,11,.12);color:#92400e}
    .badge.hot{background:rgba(37,99,235,.1);color:#1d4ed8}
    .steps{counter-reset:step}
    .step{position:relative;padding:22px 22px 22px 70px}
    .step::before{
      counter-increment:step;content:counter(step,decimal-leading-zero);
      position:absolute;left:22px;top:22px;width:34px;height:34px;border-radius:12px;
      display:grid;place-items:center;background:linear-gradient(135deg,var(--primary),var(--primary-2));color:#fff;font-weight:700;font-size:13px;
    }
    .step h3{margin:0 0 8px}
    .step p{margin:0;color:var(--muted);line-height:1.76}
    .timeline{display:grid;gap:14px}
    .timeline-item{padding:18px 20px;display:flex;gap:14px;align-items:flex-start}
    .timeline-dot{width:12px;height:12px;margin-top:6px;border-radius:999px;background:linear-gradient(135deg,var(--primary),var(--warm));box-shadow:0 0 0 6px rgba(37,99,235,.08)}
    .timeline-item h3{margin:0 0 6px;font-size:17px}
    .timeline-item p{margin:0;color:var(--muted);line-height:1.72}
    .faq{display:grid;gap:12px}
    .faq-item button{
      width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
      border:0;background:transparent;color:var(--text);font:inherit;padding:18px 20px;cursor:pointer;text-align:left;
    }
    .faq-item button span{font-weight:700}
    .faq-content{max-height:0;overflow:hidden;transition:max-height .28s ease;padding:0 20px}
    .faq-content p{margin:0 0 18px;color:var(--muted);line-height:1.8}
    .faq-item.active .faq-content{max-height:180px}
    .faq-item.active .chev{transform:rotate(180deg)}
    .chev{transition:.2s}
    .reviews .review strong{display:block;margin-bottom:4px}
    .review small{color:var(--primary);font-weight:700}
    .review .role{margin:0 0 10px;color:#4b6480;font-size:13px}
    .articles{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .article .meta{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:12px}
    .article .meta span{font-size:12px;padding:6px 10px;border-radius:999px;background:#f1f6ff;color:#385571}
    .form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
    .field{display:flex;flex-direction:column;gap:8px}
    .field label{font-size:14px;font-weight:700}
    .field input,.field select,.field textarea{
      width:100%;border:1px solid var(--line);background:#fff;border-radius:14px;padding:13px 14px;
      font:inherit;color:var(--text);outline:none;transition:.2s;
    }
    .field textarea{min-height:124px;resize:vertical}
    .field input:focus,.field select:focus,.field textarea:focus{border-color:#8db4ff;box-shadow:0 0 0 4px rgba(37,99,235,.08)}
    .full{grid-column:1 / -1}
    .form-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:8px}
    .faq-box,.form-card{position:relative;overflow:hidden}
    .faq-box::after,.form-card::after,.hero-main::after{
      content:"";position:absolute;inset:auto -10% -30% auto;width:240px;height:240px;border-radius:50%;
      background:radial-gradient(circle, rgba(37,99,235,.08), transparent 65%);pointer-events:none;
    }
    .footer{
      padding:28px 0 34px;
      margin-top:10px;
      border-top:1px solid rgba(219,228,240,.9);
      background:rgba(245,247,251,.92);
      color:var(--text);
    }
    .footer-grid{display:grid;grid-template-columns:1.1fr .9fr .9fr;gap:18px;align-items:start}
    .footer a{color:var(--text)}
    .footer p,.footer li{color:var(--muted);line-height:1.75}
    .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:grid;gap:10px
    }
    .float-tools a,.backtop{
      width:48px;height:48px;border-radius:16px;border:1px solid var(--line);background:#fff;box-shadow:0 10px 24px rgba(20,40,80,.12);
      display:grid;place-items:center;color:var(--primary);font-weight:800;cursor:pointer
    }
    .backtop{opacity:0;pointer-events:none;transform:translateY(8px);transition:.2s}
    .backtop.show{opacity:1;pointer-events:auto;transform:translateY(0)}
    .mobile-only{display:none}
    .fade-up{opacity:0;transform:translateY(18px);transition:all .55s ease}
    .fade-up.show{opacity:1;transform:translateY(0)}
    .service-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .kpi-band{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:14px}
    .slogan{
      padding:18px 22px;border-radius:20px;background:linear-gradient(135deg, rgba(37,99,235,.08), rgba(14,165,233,.08));
      border:1px solid rgba(37,99,235,.12)
    }
    .slogan strong{display:block;margin-bottom:6px}
    .split-info{display:grid;grid-template-columns:1fr 1fr;gap:16px}
    .note{font-size:13px;color:var(--muted);line-height:1.7}
    @media (max-width: 1080px){
      .hero-grid,.grid-4,.grid-3,.articles,.footer-grid,.kpi-band,.split-info{grid-template-columns:1fr 1fr}
    }
    @media (max-width: 820px){
      .nav-links,.nav-cta{display:none}
      .menu-btn{display:inline-grid;place-items:center}
      .mobile-only{display:block}
      .hero-grid,.grid-4,.grid-3,.grid-2,.articles,.footer-grid,.kpi-band,.split-info,.form-grid,.hero-points{grid-template-columns:1fr}
      .section-title{flex-direction:column;align-items:flex-start}
      .hero-main{padding:24px}
      .step{padding-left:22px}
      .step::before{position:static;margin-bottom:12px}
      .brand-text span{display:none}
      table{min-width:760px}
    }
    .mobile-nav{
      display:none;padding:0 0 16px;
    }
    .mobile-nav.open{display:block}
    .mobile-nav a{
      display:block;padding:12px 0;border-top:1px solid rgba(219,228,240,.8);color:var(--text)
    }