:root{
      --bg:#f6f8fc;
      --bg2:#edf2ff;
      --card:#ffffff;
      --text:#111827;
      --muted:#5b6475;
      --line:#dbe3f1;
      --brand:#5b5ff4;
      --brand2:#18c3ff;
      --brand3:#7c3aed;
      --good:#0f9d68;
      --warn:#d97706;
      --shadow:0 16px 40px rgba(20, 36, 80, .10);
      --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;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(91,95,244,.14), transparent 25%),
        radial-gradient(circle at top right, rgba(24,195,255,.16), transparent 24%),
        linear-gradient(180deg, #fbfcff 0%, #f3f7ff 52%, #eef3fb 100%);
    }
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    .container{width:min(100% - 32px, var(--container)); margin:0 auto}
    header{
      position:sticky;top:0;z-index:30;
      backdrop-filter:blur(14px);
      background:rgba(246,248,252,.82);
      border-bottom:1px solid rgba(219,227,241,.75);
    }
    .nav{
      display:flex;align-items:center;justify-content:space-between;gap:18px;
      padding:14px 0;
    }
    .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;box-shadow:0 8px 24px rgba(91,95,244,.12)}
    .brand strong{display:block;font-size:18px;letter-spacing:.5px}
    .brand span{display:block;font-size:12px;color:var(--muted);margin-top:2px}
    .navlinks{display:flex;align-items:center;gap:16px;flex-wrap:wrap;justify-content:flex-end}
    .navlinks a{font-size:14px;color:#243045;padding:8px 10px;border-radius:999px;transition:.2s ease}
    .navlinks a:hover{background:rgba(91,95,244,.08);color:var(--brand)}
    .nav-actions{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:.22s ease;cursor:pointer;white-space:nowrap
    }
    .btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;box-shadow:0 10px 24px rgba(91,95,244,.24)}
    .btn-primary:hover{transform:translateY(-2px);box-shadow:0 14px 30px rgba(91,95,244,.30)}
    .btn-ghost{background:#fff;border-color:var(--line);color:var(--text)}
    .btn-ghost:hover{border-color:rgba(91,95,244,.35);color:var(--brand)}
    .menu-btn{display:none;background:#fff;border:1px solid var(--line);border-radius:12px;padding:10px 12px}
    main{overflow:hidden}
    .hero{
      padding:34px 0 20px;
      position:relative;
    }
    .hero-grid{
      display:grid;grid-template-columns:1.18fr .82fr;gap:20px;align-items:stretch;
    }
    .hero-copy,.hero-panel,.section-card,.info-card,.review-card,.faq-item,.article-card,.price-card,.case-card,.service-card,.step-card,.adv-card,.form-card,.compare-card{
      background:rgba(255,255,255,.88);
      border:1px solid rgba(219,227,241,.9);
      box-shadow:var(--shadow);
      border-radius:var(--radius);
    }
    .hero-copy{padding:34px;position:relative;isolation:isolate;overflow:hidden}
    .hero-copy::before,.hero-copy::after{
      content:"";position:absolute;border-radius:999px;filter:blur(10px);pointer-events:none
    }
    .hero-copy::before{width:180px;height:180px;background:rgba(91,95,244,.14);right:-50px;top:-30px}
    .hero-copy::after{width:130px;height:130px;background:rgba(24,195,255,.18);right:120px;bottom:-40px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;background:rgba(91,95,244,.08);color:var(--brand);font-weight:700;font-size:13px}
    h1{font-size:clamp(30px,4vw,54px);line-height:1.08;margin:16px 0 14px;letter-spacing:-.5px}
    .lead{font-size:17px;line-height:1.8;color:#314055;max-width:62ch;margin:0}
    .hero-points{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:22px 0 0;padding:0;list-style:none}
    .hero-points li{display:flex;gap:10px;align-items:flex-start;padding:14px 14px;background:#f8fbff;border:1px solid #e5ecfb;border-radius:16px;color:#243045}
    .dot{width:10px;height:10px;border-radius:50%;margin-top:7px;background:linear-gradient(135deg,var(--brand),var(--brand2));flex:none}
    .hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
    .hero-note{margin-top:14px;color:var(--muted);font-size:13px}
    .hero-panel{padding:24px;display:grid;gap:14px}
    .panel-top{display:grid;gap:12px}
    .mini-stat{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
    .stat{padding:16px;border-radius:18px;background:linear-gradient(180deg,#ffffff,#f5f8ff);border:1px solid #e4ebf8}
    .stat strong{display:block;font-size:22px}
    .stat span{display:block;color:var(--muted);font-size:13px;margin-top:6px;line-height:1.5}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag-cloud span{padding:9px 12px;border-radius:999px;background:#f4f7ff;border:1px solid #e2e9f8;color:#294055;font-size:13px}
    .section{padding:18px 0}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:12px;margin-bottom:16px}
    .section-head h2{margin:0;font-size:clamp(22px,2.8vw,34px)}
    .section-head p{margin:0;color:var(--muted);max-width:62ch;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}
    .section-card,.service-card,.step-card,.case-card,.review-card,.price-card,.article-card,.faq-item,.compare-card,.form-card,.info-card,.adv-card{padding:22px}
    .service-card h3,.step-card h3,.case-card h3,.review-card h3,.article-card h3,.price-card h3,.info-card h3,.adv-card h3{margin:12px 0 8px;font-size:18px}
    .muted{color:var(--muted);line-height:1.7}
    .icon-badge{width:48px;height:48px;border-radius:14px;display:grid;place-items:center;background:linear-gradient(135deg,rgba(91,95,244,.14),rgba(24,195,255,.16));color:var(--brand);font-weight:900}
    .metric-list{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}
    .metric{padding:18px;border-radius:18px;background:linear-gradient(180deg,#fff,#f4f7ff);border:1px solid #e3eaf7}
    .metric strong{font-size:26px;display:block}
    .metric span{display:block;margin-top:8px;color:var(--muted);font-size:13px;line-height:1.5}
    .timeline{display:grid;gap:12px}
    .timeline-item{display:grid;grid-template-columns:120px 1fr;gap:14px;align-items:start;padding:16px;border-radius:18px;background:#f8fbff;border:1px solid #e4ebf8}
    .timeline-item b{color:var(--brand)}
    .table-wrap{overflow:auto;border-radius:18px;border:1px solid #e2e9f8;background:#fff}
    table{width:100%;border-collapse:collapse;min-width:760px}
    th,td{padding:14px 14px;border-bottom:1px solid #e8eef8;text-align:left;vertical-align:top}
    th{background:#f7f9ff;font-size:14px}
    tr:last-child td{border-bottom:none}
    .highlight{background:linear-gradient(135deg,rgba(91,95,244,.08),rgba(24,195,255,.08))}
    details{border:1px solid #e3ebf9;border-radius:16px;background:#fff;overflow:hidden}
    details+details{margin-top:12px}
    summary{list-style:none;padding:18px 18px;cursor:pointer;font-weight:700;display:flex;align-items:center;justify-content:space-between;gap:16px}
    summary::-webkit-details-marker{display:none}
    summary::after{content:"+";font-size:20px;color:var(--brand)}
    details[open] summary::after{content:"–"}
    details .faq-body{padding:0 18px 18px;color:var(--muted);line-height:1.8}
    .review-meta{display:flex;justify-content:space-between;gap:12px;align-items:center;margin-bottom:10px}
    .stars{color:#f59e0b;letter-spacing:2px;font-size:14px}
    .rating-box{display:grid;grid-template-columns:1fr auto;gap:16px;align-items:center}
    .rating-score{font-size:42px;font-weight:900;color:var(--brand)}
    .rating-pill{display:inline-flex;padding:8px 12px;border-radius:999px;background:rgba(15,157,104,.1);color:var(--good);font-weight:700}
    .articles{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .article-card time{display:inline-block;font-size:13px;color:var(--muted);margin-bottom:10px}
    .link-list{display:grid;gap:10px}
    .link-list a{display:flex;justify-content:space-between;gap:12px;padding:12px 14px;border-radius:14px;border:1px solid #e3ebf9;background:#fff;color:#21304a}
    .link-list a:hover{border-color:rgba(91,95,244,.35);color:var(--brand)}
    .form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
    label{display:grid;gap:8px;font-weight:700;font-size:14px;color:#243045}
    input,select,textarea{
      width:100%;border:1px solid #dbe3f1;border-radius:14px;padding:13px 14px;
      font:inherit;color:var(--text);background:#fff;outline:none;transition:.2s ease
    }
    input:focus,select:focus,textarea:focus{border-color:rgba(91,95,244,.55);box-shadow:0 0 0 4px rgba(91,95,244,.10)}
    textarea{min-height:124px;resize:vertical}
    .full{grid-column:1/-1}
    .footer{
      margin-top:26px;padding:22px 0 30px;border-top:1px solid rgba(219,227,241,.9);
      background:linear-gradient(180deg,rgba(255,255,255,.4),rgba(245,248,255,.95));
      color:#21304a
    }
    .footer-grid{display:grid;grid-template-columns:1.2fr .8fr .8fr;gap:18px;align-items:start}
    .footer a{color:#21304a}
    .footer a:hover{color:var(--brand)}
    .footer small{color:var(--muted)}
    .floating{
      position:fixed;right:16px;bottom:16px;z-index:50;display:grid;gap:10px
    }
    .float-btn{
      width:54px;height:54px;border-radius:18px;border:none;display:grid;place-items:center;
      background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;box-shadow:0 16px 30px rgba(91,95,244,.26);cursor:pointer
    }
    .float-panel{
      width:min(320px,calc(100vw - 32px));background:#fff;border:1px solid #dbe3f1;border-radius:20px;
      box-shadow:var(--shadow);padding:14px;display:none
    }
    .float-panel.open{display:block}
    .float-panel img{border-radius:16px;border:1px solid #e7edf9}
    .fade-up{animation:fadeUp .7s ease both}
    @keyframes fadeUp{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}
    .reveal{opacity:0;transform:translateY(14px);transition:.7s ease}
    .reveal.in{opacity:1;transform:none}
    .mobile-only{display:none}
    @media (max-width: 980px){
      .hero-grid,.grid-3,.grid-4,.metric-list,.footer-grid,.articles{grid-template-columns:1fr 1fr}
      .hero-copy,.hero-panel{padding:24px}
      .navlinks{display:none}
      .menu-btn{display:inline-flex}
      .mobile-only{display:block}
    }
    @media (max-width: 720px){
      .container{width:min(100% - 22px, var(--container))}
      .hero-grid,.grid-3,.grid-4,.metric-list,.footer-grid,.articles,.form-grid,.mini-stat{grid-template-columns:1fr}
      .hero-points{grid-template-columns:1fr}
      .timeline-item{grid-template-columns:1fr}
      .section-head,.rating-box{grid-template-columns:1fr;display:grid;align-items:start}
      .nav{padding:12px 0}
      .brand strong{font-size:16px}
      .hero{padding-top:18px}
      h1{font-size:28px}
      .lead{font-size:16px}
      .nav-actions .btn-ghost{display:none}
    }