:root{
      --bg:#eef4ff;
      --surface:#ffffff;
      --surface-2:#f7faff;
      --line:#d9e5ff;
      --primary:#0b4bd6;
      --primary-2:#1d72ff;
      --accent:#20a4ff;
      --text:#16304f;
      --muted:#5f6f88;
      --shadow:0 18px 50px rgba(12,58,160,.10);
      --shadow-soft:0 10px 30px rgba(12,58,160,.08);
      --radius:22px;
      --radius-sm:14px;
      --max:1200px;
    }
    *{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(29,114,255,.16), transparent 30%),
        radial-gradient(circle at 80% 8%, rgba(32,164,255,.14), transparent 24%),
        linear-gradient(180deg, #f5f9ff 0%, #eef4ff 44%, #f8fbff 100%);
      line-height:1.7;
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(var(--max), calc(100% - 32px)); margin:0 auto}
    .topbar, header, main, footer{position:relative}
    .topbar{
      background:rgba(255,255,255,.7);
      backdrop-filter: blur(10px);
      border-bottom:1px solid rgba(217,229,255,.8);
    }
    .topbar-inner{
      display:flex;align-items:center;justify-content:space-between;gap:18px;
      padding:12px 0;
    }
    .brand{display:flex;align-items:center;gap:12px;min-width:0}
    .brand .ai-page-logo{width:44px;height:44px;object-fit:contain}
    .brand-txt{display:flex;flex-direction:column;min-width:0}
    .brand-txt strong{font-size:18px;line-height:1.2}
    .brand-txt span{font-size:12px;color:var(--muted)}
    .home-link, .ghost-btn, .primary-btn, .submit-btn, .floating-btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      border-radius:999px;border:1px solid transparent;transition:.25s ease;
      font-weight:700;cursor:pointer;white-space:nowrap;
    }
    .home-link{padding:10px 16px;background:#fff;border-color:var(--line);color:var(--primary)}
    .primary-btn,.submit-btn{padding:12px 18px;background:linear-gradient(135deg,var(--primary),var(--primary-2));color:#fff;box-shadow:0 14px 28px rgba(11,75,214,.18)}
    .ghost-btn{padding:12px 18px;background:rgba(255,255,255,.76);border-color:var(--line);color:var(--text)}
    .home-link:hover,.primary-btn:hover,.ghost-btn:hover,.submit-btn:hover,.floating-btn:hover{transform:translateY(-2px);box-shadow:var(--shadow-soft)}
    .nav-wrap{
      background:rgba(255,255,255,.72);
      border-bottom:1px solid rgba(217,229,255,.7);
    }
    nav{
      display:flex;align-items:center;justify-content:space-between;gap:18px;
      padding:14px 0;
    }
    .nav-toggle{display:none}
    .nav-links{
      display:flex;flex-wrap:wrap;gap:8px;align-items:center;justify-content:flex-end;
    }
    .nav-links a{
      padding:9px 12px;border-radius:999px;color:var(--text);font-size:14px;
    }
    .nav-links a:hover,.nav-links a.active{background:rgba(11,75,214,.08);color:var(--primary)}
    .hero{
      padding:34px 0 12px;
    }
    .hero-grid{
      display:grid;grid-template-columns:1.18fr .82fr;gap:22px;align-items:stretch;
    }
    .hero-card{
      background:linear-gradient(135deg, rgba(11,75,214,.98), rgba(29,114,255,.92) 58%, rgba(32,164,255,.90));
      color:#fff;border-radius:28px;padding:32px;box-shadow:0 26px 60px rgba(11,75,214,.24);overflow:hidden;position:relative;
    }
    .hero-card::before,.hero-card::after{
      content:"";position:absolute;border-radius:50%;background:rgba(255,255,255,.10);filter:blur(4px)
    }
    .hero-card::before{width:210px;height:210px;right:-70px;top:-50px}
    .hero-card::after{width:140px;height:140px;left:-40px;bottom:-30px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.15);border:1px solid rgba(255,255,255,.18);padding:7px 12px;border-radius:999px;font-size:13px}
    h1{margin:14px 0 14px;font-size:clamp(32px, 5vw, 54px);line-height:1.06;letter-spacing:-.02em}
    .hero-card p{margin:0;color:rgba(255,255,255,.92);font-size:16px;max-width:62ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}
    .hero-actions .ghost-btn{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.24);color:#fff}
    .stats{
      display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin-top:24px
    }
    .stat{
      background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.16);
      border-radius:18px;padding:16px 14px;backdrop-filter: blur(4px)
    }
    .stat strong{display:block;font-size:24px;line-height:1.1}
    .stat span{font-size:13px;color:rgba(255,255,255,.88)}
    .hero-side{
      display:grid;gap:16px
    }
    .mini-card{
      background:rgba(255,255,255,.86);border:1px solid rgba(217,229,255,.95);
      border-radius:24px;padding:20px;box-shadow:var(--shadow-soft)
    }
    .mini-card h2{margin:0 0 10px;font-size:20px}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag{padding:8px 12px;background:#f3f7ff;border:1px solid var(--line);border-radius:999px;font-size:13px;color:var(--primary)}
    .section{padding:22px 0}
    .section-head{
      display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:16px
    }
    .section-head h2{margin:0;font-size:28px;line-height:1.1}
    .section-head p{margin:0;color:var(--muted);max-width:58ch}
    .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{
      background:var(--surface);border:1px solid rgba(217,229,255,.95);border-radius:var(--radius);
      padding:22px;box-shadow:var(--shadow-soft)
    }
    .card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
    .card h3{margin:0 0 10px;font-size:20px}
    .card p,.card li{color:var(--muted)}
    .metric strong{display:block;font-size:28px;color:var(--primary);line-height:1}
    .metric span{font-size:13px;color:var(--muted)}
    .icon{
      width:44px;height:44px;border-radius:14px;background:linear-gradient(135deg, rgba(11,75,214,.12), rgba(32,164,255,.16));
      display:inline-flex;align-items:center;justify-content:center;color:var(--primary);font-weight:800;margin-bottom:12px
    }
    .steps{counter-reset:step}
    .step{position:relative;padding-left:18px}
    .step::before{
      counter-increment:step;content:counter(step);
      position:absolute;left:0;top:2px;width:28px;height:28px;border-radius:50%;
      background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;
      display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:800
    }
    .compare-wrap{overflow-x:auto}
    table{width:100%;border-collapse:separate;border-spacing:0;min-width:760px;background:var(--surface);border:1px solid var(--line);border-radius:18px;overflow:hidden}
    th,td{padding:14px 16px;border-bottom:1px solid rgba(217,229,255,.8);text-align:left;vertical-align:top}
    th{background:#f6f9ff;color:#203a63}
    tr:last-child td{border-bottom:none}
    .badge{display:inline-flex;align-items:center;padding:6px 10px;border-radius:999px;background:#edf4ff;color:var(--primary);font-size:12px;font-weight:700}
    .rating{
      display:flex;flex-wrap:wrap;gap:10px;align-items:center
    }
    .stars{color:#ffb400;font-size:18px;letter-spacing:2px}
    details{
      background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:16px 18px;box-shadow:var(--shadow-soft)
    }
    details + details{margin-top:12px}
    summary{cursor:pointer;font-weight:700;color:var(--text)}
    summary::-webkit-details-marker{display:none}
    summary::after{content:"＋";float:right;color:var(--primary)}
    details[open] summary::after{content:"－"}
    .reviews{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .review .meta{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:12px}
    .review .name{font-weight:800}
    .review .role{font-size:13px;color:var(--muted)}
    .review p{margin:0;color:var(--text)}
    .news-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
    .news-item{display:flex;gap:12px;align-items:flex-start;padding:14px;border:1px solid var(--line);border-radius:16px;background:#fff}
    .news-item time{font-size:12px;color:var(--muted);white-space:nowrap}
    .form{
      display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px
    }
    .field{display:flex;flex-direction:column;gap:8px}
    .field.full{grid-column:1/-1}
    label{font-weight:700;font-size:14px}
    input,select,textarea{
      width:100%;border:1px solid #cfe0ff;border-radius:14px;background:#fff;padding:13px 14px;font:inherit;color:var(--text);
      outline:none;transition:.2s ease
    }
    textarea{min-height:120px;resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:var(--primary);box-shadow:0 0 0 4px rgba(11,75,214,.10)}
    .footer{
      margin-top:14px;padding:24px 0 34px;border-top:1px solid rgba(217,229,255,.9);background:rgba(255,255,255,.76)
    }
    .footer-grid{display:grid;grid-template-columns:1.1fr .9fr .9fr;gap:18px}
    .footer h3{margin:0 0 10px;font-size:18px}
    .footer p,.footer a,.footer li{color:var(--muted)}
    .footer a:hover{color:var(--primary)}
    .footer-links{display:flex;flex-wrap:wrap;gap:10px}
    .footer-links a{padding:8px 11px;border-radius:999px;background:#f4f8ff;border:1px solid var(--line)}
    .service-pills{display:flex;flex-wrap:wrap;gap:10px}
    .service-pills span{padding:8px 12px;border-radius:999px;background:#f3f7ff;border:1px solid var(--line);font-size:13px}
    .floating{
      position:fixed;right:16px;bottom:16px;z-index:40;display:flex;flex-direction:column;gap:10px
    }
    .floating-btn{padding:12px 14px;background:#fff;border:1px solid var(--line);color:var(--primary);box-shadow:var(--shadow-soft)}
    .floating-btn.primary{background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff}
    .kefu{
      position:fixed;left:16px;bottom:16px;z-index:40;width:76px
    }
    .kefu .floating-btn{width:100%}
    .fade-in{opacity:0;transform:translateY(18px);transition:.7s ease}
    .fade-in.show{opacity:1;transform:none}
    .note{font-size:13px;color:var(--muted)}
    .split{
      display:grid;grid-template-columns:1fr 1fr;gap:16px;align-items:start
    }
    .panel{background:var(--surface);border:1px solid var(--line);border-radius:22px;padding:20px;box-shadow:var(--shadow-soft)}
    .table-note{margin-top:10px;font-size:13px;color:var(--muted)}
    @media (max-width: 980px){
      .hero-grid,.grid-3,.reviews,.footer-grid,.split,.grid-2,.news-list{grid-template-columns:1fr}
      .section-head{align-items:flex-start;flex-direction:column}
      .nav-toggle{
        display:inline-flex;padding:10px 12px;border:1px solid var(--line);border-radius:12px;background:#fff;color:var(--text)
      }
      .nav-links{display:none;width:100%;padding-top:8px}
      nav{flex-wrap:wrap}
      nav.open .nav-links{display:flex;justify-content:flex-start}
      .form{grid-template-columns:1fr}
      .stats{grid-template-columns:1fr 1fr}
    }
    @media (max-width: 640px){
      .container{width:min(var(--max), calc(100% - 20px))}
      .hero-card{padding:24px}
      h1{font-size:30px}
      .stats{grid-template-columns:1fr}
      .topbar-inner{flex-direction:column;align-items:flex-start}
      .kefu{width:64px}
      .brand-txt strong{font-size:16px}
      .hero-actions,.rating{align-items:stretch}
      .hero-actions a,.hero-actions button{width:100%}
      .floating{right:10px;bottom:10px}
    }