:root{
      --bg:#f5f7fb;
      --panel:#ffffff;
      --panel-2:#f8fbff;
      --text:#162033;
      --muted:#5c6b84;
      --line:#dbe3f0;
      --brand:#5b63ff;
      --brand2:#12c2e9;
      --accent:#a855f7;
      --warm:#ffb347;
      --shadow:0 18px 42px rgba(27,39,80,.10);
      --shadow2:0 10px 24px rgba(56,84,180,.14);
      --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;
      background:
        radial-gradient(circle at top left, rgba(91,99,255,.12), transparent 28%),
        radial-gradient(circle at top right, rgba(18,194,233,.10), transparent 26%),
        linear-gradient(180deg,#f8fbff 0%,#f5f7fb 42%,#f7f8fc 100%);
      color:var(--text);
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(var(--container),calc(100% - 32px));margin:0 auto}
    .site-header,.site-footer{position:relative;z-index:10}
    .nav{
      display:flex;align-items:center;justify-content:space-between;gap:16px;
      padding:16px 0;
    }
    .brand{display:flex;align-items:center;gap:12px;min-width:0}
    .brand img{width:42px;height:42px;object-fit:contain;border-radius:12px;background:#fff;padding:4px;box-shadow:0 8px 20px rgba(0,0,0,.08)}
    .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;flex-wrap:wrap;gap:14px;align-items:center;justify-content:flex-end}
    .nav-links a{font-size:14px;color:var(--muted);padding:8px 10px;border-radius:999px}
    .nav-links a:hover,.nav-links a:focus{background:rgba(91,99,255,.10);color:var(--text)}
    .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;transition:.25s ease;cursor:pointer;white-space:nowrap
    }
    .btn-primary{background:linear-gradient(135deg,var(--brand) 0%,var(--brand2) 100%);color:#fff;box-shadow:0 14px 26px rgba(91,99,255,.22)}
    .btn-primary:hover{transform:translateY(-2px);box-shadow:0 18px 30px rgba(91,99,255,.28)}
    .btn-ghost{background:#fff;color:var(--text);border-color:var(--line)}
    .btn-ghost:hover{border-color:rgba(91,99,255,.35);transform:translateY(-2px)}
    .menu-toggle{display:none;background:#fff;border:1px solid var(--line);border-radius:14px;padding:10px 12px}
    .hero{padding:28px 0 10px}
    .hero-wrap{
      position:relative;overflow:hidden;border-radius:32px;background:
      linear-gradient(135deg, rgba(10,15,35,.98), rgba(34,41,78,.96) 45%, rgba(68,38,119,.96) 100%);
      color:#eef4ff;box-shadow:var(--shadow);padding:34px 28px 28px
    }
    .hero-wrap:before,.hero-wrap:after{
      content:"";position:absolute;border-radius:50%;filter:blur(2px);pointer-events:none
    }
    .hero-wrap:before{width:260px;height:260px;background:radial-gradient(circle, rgba(18,194,233,.34), transparent 68%);top:-90px;right:-70px}
    .hero-wrap:after{width:220px;height:220px;background:radial-gradient(circle, rgba(168,85,247,.28), transparent 68%);bottom:-100px;left:-80px}
    .hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:24px;align-items:stretch;position:relative;z-index:1}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:#d8e6ff;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.10);padding:8px 12px;border-radius:999px}
    h1{margin:14px 0 12px;font-size:clamp(34px,5vw,58px);line-height:1.05;letter-spacing:-.03em}
    .hero p{margin:0;color:#d2def4;font-size:16px;line-height:1.8;max-width:60ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin:22px 0 20px}
    .hero-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
    .stat{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.10);backdrop-filter:blur(8px);border-radius:18px;padding:14px}
    .stat strong{display:block;font-size:20px;color:#fff}
    .stat span{display:block;margin-top:4px;color:#c9d7ef;font-size:13px;line-height:1.4}
    .hero-panel{
      background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.12);backdrop-filter:blur(10px);
      border-radius:24px;padding:18px;display:grid;gap:14px;align-content:start
    }
    .mini-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
    .mini-card{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.08);border-radius:16px;padding:14px}
    .mini-card b{display:block;font-size:14px;color:#fff;margin-bottom:6px}
    .mini-card p{margin:0;font-size:13px;line-height:1.6;color:#c8d6ef}
    .section{padding:28px 0}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:16px}
    .section-head h2{margin:0;font-size:clamp(24px,3vw,36px);line-height:1.15}
    .section-head p{margin:0;color:var(--muted);max-width:68ch;line-height:1.7}
    .grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
    .card{
      background:linear-gradient(180deg,#fff 0%,#fbfcff 100%);
      border:1px solid rgba(219,227,240,.95);border-radius:var(--radius);box-shadow:0 8px 20px rgba(17,24,39,.04);
      padding:18px;transition:.25s ease;height:100%
    }
    .card:hover{transform:translateY(-4px);box-shadow:var(--shadow2)}
    .card h3,.card h4{margin:0 0 10px}
    .card p{margin:0;color:var(--muted);line-height:1.75}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag{background:#fff;border:1px solid var(--line);border-radius:999px;padding:9px 12px;font-size:13px;color:#30405f}
    .highlight{border-left:4px solid var(--brand);padding-left:14px}
    .steps{counter-reset:step}
    .step{position:relative;padding-left:54px}
    .step:before{
      counter-increment:step;content:counter(step);
      position:absolute;left:0;top:0;width:36px;height:36px;border-radius:12px;display:grid;place-items:center;
      background:linear-gradient(135deg,var(--brand),var(--accent));color:#fff;font-weight:800
    }
    .table-wrap{overflow:auto;border-radius:22px;border:1px solid var(--line);background:#fff;box-shadow:0 10px 22px rgba(0,0,0,.04)}
    table{width:100%;border-collapse:collapse;min-width:820px}
    th,td{padding:14px 16px;border-bottom:1px solid #edf1f7;text-align:left;vertical-align:top}
    th{background:#f7f9fe;color:#22314d;font-size:14px}
    td{color:#33415d;line-height:1.7}
    .badge{display:inline-flex;align-items:center;padding:6px 10px;border-radius:999px;background:rgba(91,99,255,.12);color:#3340a5;font-size:12px;font-weight:700}
    .compare-card{background:linear-gradient(135deg,#111827,#202b55 52%,#3c1f6f);color:#eef4ff;border:0}
    .compare-card p,.compare-card li{color:#d7e2ff}
    .compare-score{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
    .stars{color:#ffd166;font-size:20px;letter-spacing:2px}
    details{background:#fff;border:1px solid var(--line);border-radius:18px;padding:0 16px;box-shadow:0 8px 20px rgba(0,0,0,.03)}
    details+details{margin-top:12px}
    summary{cursor:pointer;list-style:none;padding:16px 0;font-weight:700;color:var(--text)}
    summary::-webkit-details-marker{display:none}
    details p{padding:0 0 16px;margin:0;color:var(--muted);line-height:1.8}
    .reviews .card{display:flex;flex-direction:column;gap:12px}
    .review-top{display:flex;align-items:center;justify-content:space-between;gap:12px}
    .avatar{width:44px;height:44px;border-radius:50%;background:linear-gradient(135deg,rgba(91,99,255,.2),rgba(18,194,233,.2));display:grid;place-items:center;font-weight:800;color:#21315a}
    .form{
      display:grid;grid-template-columns:repeat(2,1fr);gap:14px
    }
    .field{display:flex;flex-direction:column;gap:8px}
    .field.full{grid-column:1/-1}
    label{font-size:14px;color:#22314d;font-weight:700}
    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
    }
    textarea{min-height:120px;resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:rgba(91,99,255,.6);box-shadow:0 0 0 4px rgba(91,99,255,.10)}
    .footer{
      padding:18px 0 26px;color:#33415d
    }
    .footer-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:18px;align-items:start}
    .footer small,.footer a{color:#42516d}
    .footer-panel{
      background:#fff;border:1px solid var(--line);border-radius:22px;padding:18px;box-shadow:0 8px 20px rgba(0,0,0,.03)
    }
    .footer-links{display:flex;flex-wrap:wrap;gap:10px}
    .footer-links a{padding:8px 10px;border-radius:10px;background:#f7f9fe}
    .floating{
      position:fixed;right:16px;bottom:16px;z-index:50;display:grid;gap:10px
    }
    .float-btn{
      width:50px;height:50px;border-radius:16px;border:0;background:linear-gradient(135deg,var(--brand),var(--brand2));
      color:#fff;display:grid;place-items:center;box-shadow:0 14px 30px rgba(91,99,255,.28);cursor:pointer
    }
    .chat-box{
      position:fixed;right:16px;bottom:78px;z-index:50;width:min(320px,calc(100vw - 32px));display:none;
      background:#fff;border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow);overflow:hidden
    }
    .chat-box.open{display:block;animation:pop .22s ease}
    .chat-head{padding:14px 16px;background:linear-gradient(135deg,#f4f7ff,#eef8ff);border-bottom:1px solid var(--line)}
    .chat-body{padding:16px;display:grid;gap:12px}
    .chat-body img{width:100%;border-radius:16px;border:1px solid var(--line)}
    .topline{display:flex;align-items:center;justify-content:space-between;gap:10px}
    .muted{color:var(--muted)}
    .article-list{display:grid;gap:12px}
    .article-item{display:flex;justify-content:space-between;gap:14px;align-items:start;padding:14px 0;border-bottom:1px solid #edf1f7}
    .article-item:last-child{border-bottom:0;padding-bottom:0}
    .pill{display:inline-flex;padding:5px 9px;border-radius:999px;background:#eef3ff;color:#32428e;font-size:12px;font-weight:700}
    .timeline{display:grid;gap:12px}
    .timeline-item{display:grid;grid-template-columns:120px 1fr;gap:14px;padding:14px 0;border-bottom:1px dashed #e5eaf4}
    .timeline-item:last-child{border-bottom:0;padding-bottom:0}
    .timeline-item b{color:#20314e}
    .anchor-space{scroll-margin-top:84px}
    @keyframes pop{from{transform:translateY(8px);opacity:.6}to{transform:translateY(0);opacity:1}}
    @media (max-width: 980px){
      .hero-grid,.footer-grid,.grid-4,.grid-3,.grid-2{grid-template-columns:1fr}
      .section-head{align-items:start;flex-direction:column}
      .nav-links{display:none;position:absolute;left:16px;right:16px;top:72px;background:#fff;border:1px solid var(--line);border-radius:18px;padding:12px;box-shadow:var(--shadow);z-index:30}
      .nav-links.open{display:flex;flex-direction:column;align-items:flex-start}
      .menu-toggle{display:inline-flex}
      .nav{position:relative}
      .form{grid-template-columns:1fr}
      .timeline-item{grid-template-columns:1fr}
    }