:root{
      --bg:#f6f9ff;
      --bg2:#eef4ff;
      --card:#ffffff;
      --card2:#fdfefe;
      --text:#17304b;
      --muted:#5f7288;
      --line:rgba(23,48,75,.10);
      --primary:#1a73ff;
      --primary2:#20c7ff;
      --accent:#ff7a45;
      --good:#18a957;
      --shadow:0 18px 50px rgba(17,44,84,.10);
      --shadow2:0 10px 30px rgba(17,44,84,.08);
      --radius:22px;
      --container:1200px;
    }
    *{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(26,115,255,.12), transparent 28%),
        radial-gradient(circle at top right, rgba(32,199,255,.12), transparent 24%),
        linear-gradient(180deg, #f9fbff 0%, #f4f8ff 45%, #f8fbff 100%);
      line-height:1.7;
      overflow-x:hidden;
    }
    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{
      position:sticky;top:0;z-index:50;
      backdrop-filter:blur(18px);
      background:rgba(246,249,255,.78);
      border-bottom:1px solid rgba(255,255,255,.55);
    }
    .nav-wrap{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:44px;height:44px;object-fit:contain;border-radius:12px;background:#fff;padding:6px;box-shadow:var(--shadow2)}
    .brand-text{min-width:0}
    .brand-text strong{display:block;font-size:1.02rem;letter-spacing:.5px}
    .brand-text span{display:block;font-size:.86rem;color:var(--muted)}
    .nav-toggle{display:none;border:1px solid var(--line);background:#fff;color:var(--text);border-radius:14px;padding:10px 12px;font-size:.95rem}
    .nav{display:flex;align-items:center;gap:14px;flex-wrap:wrap;justify-content:flex-end}
    .nav a{font-size:.94rem;color:var(--text);padding:8px 10px;border-radius:999px;transition:.25s}
    .nav a:hover,.nav a.active{background:rgba(26,115,255,.10);color:var(--primary)}
    .home-link{
      display:inline-flex;align-items:center;justify-content:center;
      padding:10px 16px;border-radius:999px;background:linear-gradient(135deg,var(--primary),var(--primary2));
      color:#fff;font-weight:700;box-shadow:0 12px 24px rgba(26,115,255,.25);transition:.25s
    }
    .home-link:hover{transform:translateY(-1px)}
    main{padding-bottom:10px}
    section{padding:72px 0}
    .hero{padding:52px 0 64px;position:relative}
    .hero-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:26px;align-items:stretch}
    .hero-copy,.hero-panel,.card,.block,.faq-item,.comment,.article,.price-box,.form-box,.timeline-item,.compare,.service-net{
      background:linear-gradient(180deg, rgba(255,255,255,.94), rgba(255,255,255,.98));
      border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow2)
    }
    .hero-copy{padding:32px;position:relative;overflow:hidden}
    .hero-copy::before{
      content:"";position:absolute;inset:auto -20% -28% auto;width:320px;height:320px;border-radius:50%;
      background:radial-gradient(circle, rgba(32,199,255,.16), transparent 62%);
      pointer-events:none;
    }
    .eyebrow{display:inline-flex;gap:8px;align-items:center;color:var(--primary);font-weight:700;background:rgba(26,115,255,.08);padding:8px 14px;border-radius:999px;font-size:.92rem}
    h1{margin:16px 0 14px;font-size:clamp(2rem,5vw,3.7rem);line-height:1.08;letter-spacing:-.5px}
    .hero p{margin:0;color:var(--muted);font-size:1.04rem;max-width:62ch}
    .cta-row{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      border-radius:16px;padding:13px 18px;font-weight:700;border:1px solid transparent;
      transition:.25s;cursor:pointer
    }
    .btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary2));color:#fff;box-shadow:0 16px 28px rgba(26,115,255,.22)}
    .btn-secondary{background:#fff;border-color:rgba(26,115,255,.18);color:var(--primary)}
    .btn:hover{transform:translateY(-2px);box-shadow:0 14px 26px rgba(17,44,84,.10)}
    .hero-stats{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin-top:26px}
    .stat{padding:16px;border-radius:18px;background:linear-gradient(180deg,#fff, #f8fbff);border:1px solid rgba(26,115,255,.10)}
    .stat strong{display:block;font-size:1.5rem;color:var(--text)}
    .stat span{color:var(--muted);font-size:.92rem}
    .hero-panel{padding:22px}
    .panel-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
    .mini{
      padding:16px;border-radius:18px;background:linear-gradient(180deg,#f8fbff,#fff);border:1px solid rgba(23,48,75,.08)
    }
    .mini strong{display:block;font-size:1.05rem;margin-bottom:6px}
    .mini p{margin:0;color:var(--muted);font-size:.92rem}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:14px;margin-bottom:24px}
    .section-head h2{margin:0;font-size:clamp(1.5rem,3vw,2.4rem);line-height:1.15}
    .section-head p{margin:0;color:var(--muted);max-width:66ch}
    .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,.block,.compare,.article,.comment,.faq-item,.price-box,.form-box,.service-net,.timeline-item{padding:22px}
    .icon{
      width:48px;height:48px;border-radius:16px;display:grid;place-items:center;
      background:linear-gradient(135deg, rgba(26,115,255,.12), rgba(32,199,255,.14));
      color:var(--primary);font-weight:900;margin-bottom:14px
    }
    .card h3,.block h3,.price-box h3,.comment h3,.article h3,.service-net h3{margin:0 0 8px;font-size:1.06rem}
    .card p,.block p,.price-box p,.comment p,.article p,.service-net p{margin:0;color:var(--muted)}
    .tags{display:flex;flex-wrap:wrap;gap:10px}
    .tag{
      padding:8px 12px;border-radius:999px;border:1px solid rgba(26,115,255,.14);
      background:#fff;color:var(--text);font-size:.9rem
    }
    .timeline{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
    .timeline-item strong{display:block;font-size:1rem;margin-bottom:8px}
    .timeline-item span{display:block;color:var(--muted);font-size:.92rem}
    .compare-wrap{overflow:auto}
    table{width:100%;border-collapse:collapse;min-width:760px}
    th,td{padding:14px 12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
    th{font-size:.95rem;background:#f8fbff}
    .score{font-size:1.8rem;font-weight:900;color:var(--primary)}
    .rating{color:#ffb400;font-size:1.05rem;letter-spacing:1px}
    .feature-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
    .check{display:flex;gap:10px;align-items:flex-start}
    .check i{width:22px;height:22px;border-radius:50%;background:rgba(24,169,87,.12);color:var(--good);display:grid;place-items:center;font-style:normal;font-weight:900;flex:none;margin-top:2px}
    .price-box ul,.block ul{margin:12px 0 0;padding-left:18px;color:var(--muted)}
    .faq-item{padding:0;overflow:hidden}
    .faq-q{
      width:100%;border:0;background:transparent;padding:18px 20px;display:flex;justify-content:space-between;align-items:center;
      font-size:1rem;font-weight:700;color:var(--text);cursor:pointer;text-align:left
    }
    .faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease;padding:0 20px}
    .faq-item.open .faq-a{max-height:180px;padding-bottom:18px}
    .comment .meta{display:flex;justify-content:space-between;gap:10px;align-items:center;margin-bottom:10px}
    .badge{padding:6px 10px;border-radius:999px;background:rgba(26,115,255,.08);color:var(--primary);font-size:.82rem;font-weight:700}
    .article time{color:var(--muted);font-size:.9rem}
    .article a{color:var(--primary);font-weight:700}
    .form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
    .field{display:flex;flex-direction:column;gap:8px}
    label{font-weight:700;font-size:.94rem}
    input,select,textarea{
      width:100%;border:1px solid rgba(23,48,75,.14);background:#fff;border-radius:14px;padding:13px 14px;
      font:inherit;color:var(--text);outline:none;transition:.2s
    }
    textarea{min-height:120px;resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:rgba(26,115,255,.55);box-shadow:0 0 0 4px rgba(26,115,255,.08)}
    .form-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:14px}
    .footer{
      padding:34px 0 26px;margin-top:18px;border-top:1px solid rgba(23,48,75,.08);
      background:linear-gradient(180deg, #f3f7ff, #eef4ff);color:var(--text)
    }
    .footer a{color:var(--primary)}
    .footer-grid{display:grid;grid-template-columns:1.1fr .9fr .9fr;gap:18px;align-items:start}
    .footer small,.footer p{color:var(--muted)}
    .service-net-wrap{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .floating{
      position:fixed;right:16px;bottom:16px;z-index:60;display:flex;flex-direction:column;gap:10px
    }
    .float-btn{
      width:52px;height:52px;border-radius:18px;background:linear-gradient(135deg,var(--primary),var(--primary2));
      color:#fff;display:grid;place-items:center;box-shadow:var(--shadow);font-weight:900
    }
    .float-card{
      display:none;position:absolute;right:0;bottom:64px;width:240px;padding:14px;border-radius:18px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow)
    }
    .floating.open .float-card{display:block}
    .float-card img{width:100%;border-radius:14px;margin:10px 0}
    .reveal{opacity:0;transform:translateY(18px);transition:.7s ease}
    .reveal.show{opacity:1;transform:none}
    .muted{color:var(--muted)}
    .anchor-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .anchor-cloud a{padding:9px 12px;border-radius:999px;background:#fff;border:1px solid rgba(23,48,75,.10);color:var(--text)}
    .table-card{padding:0}
    .table-head{padding:22px 22px 0}
    .highlight{color:var(--primary);font-weight:800}
    .image-strip{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
    .image-strip img,.case-img{width:100%;border-radius:18px;aspect-ratio:16/10;object-fit:cover;border:1px solid rgba(23,48,75,.08);background:#fff}
    .square-img{aspect-ratio:1/1;object-fit:cover}
    @media (max-width: 980px){
      .hero-grid,.grid-3,.grid-4,.timeline,.footer-grid,.service-net-wrap{grid-template-columns:1fr}
      .feature-list,.panel-grid,.form-grid{grid-template-columns:1fr}
      .section-head{align-items:start;flex-direction:column}
      .nav-toggle{display:inline-flex}
      .nav{display:none;width:100%;padding:12px 0 4px;justify-content:flex-start}
      .nav.open{display:flex}
      .nav-wrap{flex-wrap:wrap}
      .hero{padding-top:26px}
    }
    @media (max-width: 640px){
      section{padding:58px 0}
      .hero-copy,.hero-panel,.card,.block,.compare,.article,.comment,.faq-item,.price-box,.form-box,.service-net,.timeline-item{padding:18px}
      .hero-stats{grid-template-columns:1fr}
      .cta-row,.form-actions{flex-direction:column}
      .btn,.home-link{width:100%}
      table{min-width:680px}
    }