:root{
      --bg:#f7f8fc;
      --panel:#ffffff;
      --panel-2:#f2f5ff;
      --text:#18212f;
      --muted:#5c6473;
      --line:#dde3f0;
      --accent:#ff4d8d;
      --accent-2:#6c63ff;
      --accent-3:#18b8a8;
      --warm:#ffb64d;
      --shadow:0 18px 40px rgba(31, 43, 67, .08);
      --radius:20px;
      --container:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(255,77,141,.10), transparent 32%),
        radial-gradient(circle at top right, rgba(108,99,255,.10), transparent 28%),
        linear-gradient(180deg, #fff 0%, #f8f9ff 38%, #f6f7fb 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,.site-header,.site-footer,.main-content{position:relative;z-index:1}
    .topbar{
      background:rgba(255,255,255,.72);
      backdrop-filter:blur(14px);
      border-bottom:1px solid rgba(221,227,240,.8);
    }
    .topbar .container{display:flex;justify-content:space-between;align-items:center;padding:10px 0;gap:16px}
    .brand{display:flex;align-items:center;gap:12px;min-width:0}
    .brand .ai-page-logo{width:42px;height:42px;object-fit:contain;border-radius:12px;background:#fff;padding:4px;box-shadow:0 10px 22px rgba(0,0,0,.08)}
    .brand strong{display:block;font-size:18px;line-height:1.1}
    .brand span{display:block;color:var(--muted);font-size:12px;margin-top:3px}
    .top-actions{display:flex;gap:10px;align-items:center;flex-wrap:wrap;justify-content:flex-end}
    .pill,.btn,.nav-link,.ghost-btn{transition:.22s ease}
    .pill{padding:8px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);font-size:13px;color:var(--muted)}
    .site-header{position:sticky;top:0;z-index:20;background:rgba(247,248,252,.84);backdrop-filter:blur(16px);border-bottom:1px solid rgba(221,227,240,.85)}
    .nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:14px 0}
    .nav{display:flex;gap:10px;flex-wrap:wrap;align-items:center;justify-content:flex-end}
    .nav-link{font-size:14px;color:var(--text);padding:9px 12px;border-radius:999px}
    .nav-link:hover,.nav-link:focus{background:#fff;box-shadow:0 8px 20px rgba(31,43,67,.08)}
    .menu-toggle{display:none;border:1px solid var(--line);background:#fff;border-radius:12px;padding:10px 12px;color:var(--text)}
    .hero{
      padding:42px 0 26px;
    }
    .hero-grid{
      display:grid;
      grid-template-columns:1.2fr .8fr;
      gap:20px;
      align-items:stretch;
    }
    .hero-card{
      background:linear-gradient(135deg, rgba(255,255,255,.95), rgba(255,248,252,.94));
      border:1px solid rgba(221,227,240,.9);
      border-radius:28px;
      box-shadow:var(--shadow);
      padding:28px;
      overflow:hidden;
      position:relative;
    }
    .hero-card::before{
      content:"";
      position:absolute;inset:auto -40px -50px auto;width:180px;height:180px;border-radius:50%;
      background:radial-gradient(circle, rgba(255,77,141,.18), transparent 68%);
      pointer-events:none;
    }
    .eyebrow{display:inline-flex;gap:8px;align-items:center;padding:8px 12px;border-radius:999px;background:rgba(108,99,255,.08);color:#5148d8;font-size:13px;font-weight:600}
    h1{font-size:clamp(30px, 5vw, 54px);line-height:1.08;margin:16px 0 14px;letter-spacing:-.02em}
    .lead{font-size:17px;line-height:1.8;color:var(--muted);max-width:62ch;margin:0}
    .hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}
    .btn,.ghost-btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      min-height:46px;padding:0 18px;border-radius:14px;font-weight:700;border:1px solid transparent;
      box-shadow:0 10px 20px rgba(31,43,67,.08)
    }
    .btn{background:linear-gradient(135deg,var(--accent),#ff6b5c);color:#fff}
    .btn:hover{transform:translateY(-2px);box-shadow:0 16px 26px rgba(255,77,141,.22)}
    .ghost-btn{background:#fff;color:var(--text);border-color:var(--line)}
    .ghost-btn:hover{transform:translateY(-2px)}
    .hero-stats{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:22px}
    .stat{
      background:rgba(255,255,255,.88);
      border:1px solid rgba(221,227,240,.9);
      border-radius:18px;padding:16px
    }
    .stat b{display:block;font-size:22px}
    .stat span{font-size:13px;color:var(--muted)}
    .side-stack{display:grid;gap:16px}
    .visual-card,.info-card{
      background:linear-gradient(180deg,#fff, #fbfcff);
      border:1px solid var(--line);
      border-radius:24px;
      box-shadow:var(--shadow);
      padding:22px;
    }
    .visual-card{display:grid;gap:14px}
    .mini-kpi{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
    .kpi{padding:14px;border-radius:16px;background:linear-gradient(135deg,#f6f7ff,#fff);border:1px solid var(--line)}
    .kpi small{display:block;color:var(--muted);font-size:12px}
    .kpi strong{font-size:18px}
    section{padding:20px 0}
    .section-head{display:flex;justify-content:space-between;gap:16px;align-items:end;margin-bottom:16px}
    .section-head h2{margin:0;font-size:28px}
    .section-head p{margin:0;color:var(--muted);max-width:64ch;line-height:1.7}
    .grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
    .card{
      background:rgba(255,255,255,.92);
      border:1px solid var(--line);
      border-radius:20px;
      padding:20px;
      box-shadow:var(--shadow);
      transition:transform .22s ease, box-shadow .22s ease;
    }
    .card:hover{transform:translateY(-4px);box-shadow:0 18px 34px rgba(31,43,67,.12)}
    .card h3,.card h4{margin:0 0 10px}
    .card p{margin:0;color:var(--muted);line-height:1.8}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag{padding:9px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);font-size:13px;color:#324056}
    .process{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
    .step{position:relative}
    .step::after{content:"";position:absolute;top:30px;right:-7px;width:14px;height:14px;border-radius:50%;background:linear-gradient(135deg,var(--accent-2),var(--accent));box-shadow:0 0 0 6px rgba(108,99,255,.12)}
    .step:last-child::after{display:none}
    .compare{overflow-x:auto;border-radius:20px;border:1px solid var(--line);background:#fff;box-shadow:var(--shadow)}
    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:#f7f8ff}
    .score{font-weight:800;color:#0c7c59}
    .rating{display:flex;gap:4px;color:#ffb703;font-size:18px}
    .accordion{display:grid;gap:12px}
    .faq-item{
      border:1px solid var(--line);border-radius:18px;background:#fff;overflow:hidden;box-shadow:var(--shadow)
    }
    .faq-q{
      width:100%;padding:16px 18px;background:none;border:0;text-align:left;font-size:16px;font-weight:700;color:var(--text);
      display:flex;justify-content:space-between;gap:12px;align-items:center;cursor:pointer
    }
    .faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease,padding .28s ease;color:var(--muted);padding:0 18px}
    .faq-item.active .faq-a{max-height:220px;padding:0 18px 16px}
    .faq-item.active .faq-icon{transform:rotate(45deg)}
    .faq-icon{font-size:22px;color:var(--accent);transition:transform .22s ease}
    .review-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .review .meta{display:flex;justify-content:space-between;gap:10px;align-items:center;margin-bottom:10px}
    .review .role{color:var(--muted);font-size:13px}
    .media-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .media-grid .card img{width:100%;border-radius:16px;object-fit:cover;aspect-ratio:16/10}
    .articles{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .article-list a{display:block;padding:12px 0;border-bottom:1px dashed var(--line);color:var(--text)}
    .article-list a:last-child{border-bottom:0;padding-bottom:0}
    .form-wrap{display:grid;grid-template-columns:1.1fr .9fr;gap:16px}
    form{display:grid;gap:12px}
    .field{display:grid;gap:8px}
    label{font-size:14px;font-weight:700}
    input,select,textarea{
      width:100%;border:1px solid var(--line);background:#fff;border-radius:14px;padding:13px 14px;font:inherit;color:var(--text);outline:none
    }
    textarea{min-height:120px;resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:rgba(108,99,255,.65);box-shadow:0 0 0 4px rgba(108,99,255,.1)}
    .footer{
      margin-top:10px;
      background:#121a2a;
      color:#edf2ff;
      padding:26px 0 20px;
    }
    .footer a{color:#d7e3ff}
    .footer .muted{color:#b8c4df}
    .footer-grid{display:grid;grid-template-columns:1.2fr .8fr 1fr;gap:18px;align-items:start}
    .footer small{display:block;color:#b8c4df;line-height:1.8}
    .bottom-links{display:flex;flex-wrap:wrap;gap:10px}
    .bottom-links a{padding:8px 11px;border-radius:999px;background:rgba(255,255,255,.08)}
    .floating{
      position:fixed;right:18px;bottom:18px;display:grid;gap:10px;z-index:30
    }
    .float-btn{
      width:52px;height:52px;border-radius:16px;border:0;background:linear-gradient(135deg,var(--accent-2),var(--accent));
      color:#fff;display:grid;place-items:center;box-shadow:0 16px 28px rgba(108,99,255,.24);cursor:pointer
    }
    .float-panel{
      width:min(320px, calc(100vw - 36px));background:#fff;border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow);
      padding:14px;display:none
    }
    .floating.open .float-panel{display:block}
    .qrcode{display:flex;gap:14px;align-items:center}
    .qrcode img{width:92px;height:92px;object-fit:cover;border-radius:14px;border:1px solid var(--line)}
    .anchor-title{display:flex;align-items:center;gap:10px}
    .anchor-title::before{content:"";width:12px;height:12px;border-radius:4px;background:linear-gradient(135deg,var(--accent),var(--accent-2))}
    .scroll-x{overflow-x:auto}
    .topline{display:flex;gap:10px;flex-wrap:wrap}
    .note{padding:12px 14px;border-radius:16px;background:rgba(24,184,168,.08);border:1px solid rgba(24,184,168,.18);color:#125f59}
    .reveal{animation:rise .7s ease both}
    @keyframes rise{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}
    @media (max-width: 980px){
      .hero-grid,.form-wrap,.footer-grid,.grid-4,.grid-3,.review-grid,.articles,.media-grid,.process{grid-template-columns:1fr 1fr}
      .hero-grid{grid-template-columns:1fr}
      .step::after{display:none}
      .section-head{flex-direction:column;align-items:flex-start}
    }
    @media (max-width: 720px){
      .menu-toggle{display:inline-flex}
      .nav{display:none;width:100%;padding:10px 0 4px}
      .nav.open{display:flex}
      .nav-wrap{flex-wrap:wrap}
      .topbar .container{flex-direction:column;align-items:flex-start}
      .grid-4,.grid-3,.review-grid,.articles,.media-grid,.process,.form-wrap,.footer-grid,.hero-stats{grid-template-columns:1fr}
      .hero{padding-top:24px}
      .hero-card{padding:22px}
      h1{font-size:clamp(28px, 9vw, 40px)}
      .hero-actions,.top-actions{width:100%}
      .hero-actions .btn,.hero-actions .ghost-btn{width:100%}
      table{min-width:700px}
    }