:root{
      --bg:#f7f8fc;
      --bg2:#eef3ff;
      --card:#ffffff;
      --card2:#fff7ec;
      --text:#172033;
      --muted:#5c667a;
      --line:#d9e0f0;
      --primary:#245cff;
      --primary2:#ff5a3c;
      --accent:#12b3a8;
      --gold:#f2b84b;
      --shadow:0 18px 50px rgba(25, 42, 89, .10);
      --shadow2:0 10px 30px rgba(255, 90, 60, .12);
      --radius:22px;
      --radius2:16px;
      --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(36,92,255,.10), transparent 32%),
        radial-gradient(circle at 85% 10%, rgba(255,90,60,.12), transparent 24%),
        linear-gradient(180deg, #fff 0%, var(--bg) 38%, #f9fbff 100%);
    }
    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(14px);
      background:rgba(247,248,252,.78);
      border-bottom:1px solid rgba(217,224,240,.72);
    }
    .nav{
      display:flex;align-items:center;justify-content:space-between;gap:16px;
      min-height:76px;
    }
    .brand{display:flex;align-items:center;gap:12px;min-width:0}
    .brand .ai-page-logo{width:42px;height:42px;border-radius:12px;object-fit:cover;border:1px solid var(--line);box-shadow:0 8px 18px rgba(36,92,255,.10);background:#fff}
    .brand-text{display:flex;flex-direction:column;line-height:1.1;min-width:0}
    .brand-text strong{font-size:18px;letter-spacing:.3px}
    .brand-text span{font-size:12px;color:var(--muted);margin-top:4px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
    .nav-links{display:flex;align-items:center;gap:16px;flex-wrap:wrap;justify-content:flex-end}
    .nav-links a{font-size:14px;color:var(--text);padding:8px 10px;border-radius:999px;transition:.22s ease}
    .nav-links a:hover{background:rgba(36,92,255,.08);color:var(--primary)}
    .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;font-size:14px;
      transition:.22s ease;cursor:pointer;white-space:nowrap;
    }
    .btn-primary{background:linear-gradient(135deg,var(--primary),#7c4dff);color:#fff;box-shadow:var(--shadow2)}
    .btn-primary:hover{transform:translateY(-2px);filter:saturate(1.04)}
    .btn-secondary{background:#fff;color:var(--text);border-color:var(--line)}
    .btn-secondary:hover{transform:translateY(-2px);border-color:rgba(36,92,255,.35);box-shadow:0 12px 30px rgba(36,92,255,.10)}
    .menu-toggle{display:none;background:#fff;border:1px solid var(--line);border-radius:12px;padding:10px 12px;line-height:0}
    .menu-toggle span{display:block;width:18px;height:2px;background:var(--text);margin:4px 0;border-radius:2px}
    .hero{
      position:relative;overflow:hidden;
      padding:34px 0 22px;
    }
    .hero-inner{
      display:grid;grid-template-columns:1.15fr .85fr;gap:24px;align-items:stretch;
    }
    .hero-copy,.hero-panel,.section-card,.info-card,.faq-item,.review-card,.case-card,.article-card,.step-card,.price-card,.compare-card,.form-card,.about-card,.network-card,.tag-cloud,.value-card,.rating-card{
      background:var(--card);
      border:1px solid rgba(217,224,240,.9);
      border-radius:var(--radius);
      box-shadow:var(--shadow);
    }
    .hero-copy{padding:34px}
    .eyebrow{
      display:inline-flex;align-items:center;gap:8px;
      background:rgba(18,179,168,.10);color:#0b7d74;
      border:1px solid rgba(18,179,168,.18);
      padding:8px 12px;border-radius:999px;font-size:13px;font-weight:700;
    }
    h1{margin:16px 0 14px;font-size:clamp(32px,5vw,54px);line-height:1.06;letter-spacing:-.02em}
    .lead{font-size:17px;line-height:1.85;color:var(--muted);margin:0 0 22px}
    .hero-points{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:22px 0}
    .hero-points div{
      padding:14px 14px 14px 16px;border-radius:16px;background:linear-gradient(180deg,#fff, #f9fbff);
      border:1px solid var(--line);min-height:74px;
    }
    .hero-points strong{display:block;font-size:14px;margin-bottom:6px}
    .hero-points span{font-size:13px;color:var(--muted);line-height:1.5}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}
    .mini-meta{display:flex;flex-wrap:wrap;gap:12px;margin-top:18px;color:var(--muted);font-size:13px}
    .mini-meta span{padding:7px 10px;background:#fff;border:1px dashed var(--line);border-radius:999px}
    .hero-panel{padding:24px;background:
      linear-gradient(180deg, rgba(255,255,255,.92), rgba(255,255,255,.98)),
      linear-gradient(135deg, rgba(36,92,255,.08), rgba(255,90,60,.08));
    }
    .panel-top{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;margin-bottom:16px}
    .panel-top strong{font-size:16px}
    .panel-top p{margin:6px 0 0;color:var(--muted);font-size:13px;line-height:1.6}
    .score{
      text-align:right;padding:12px 14px;border-radius:16px;
      background:linear-gradient(135deg, rgba(36,92,255,.10), rgba(255,90,60,.10));
      border:1px solid rgba(36,92,255,.12);
      min-width:122px;
    }
    .score b{display:block;font-size:28px;color:var(--primary)}
    .score span{font-size:12px;color:var(--muted)}
    .metric-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
    .metric{
      padding:16px;border-radius:18px;background:var(--card2);
      border:1px solid rgba(242,184,75,.18)
    }
    .metric strong{display:block;font-size:24px;line-height:1.1}
    .metric span{display:block;font-size:13px;color:var(--muted);margin-top:6px;line-height:1.5}
    .section{padding:18px 0}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:16px}
    .section-head h2{margin:0;font-size:30px;line-height:1.15}
    .section-head p{margin:0;color:var(--muted);max-width:700px;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,.info-card,.review-card,.case-card,.article-card,.step-card,.price-card,.compare-card,.form-card,.about-card,.network-card,.tag-cloud,.value-card,.rating-card{padding:22px}
    .section-card h3,.info-card h3,.review-card h3,.case-card h3,.article-card h3,.step-card h3,.price-card h3,.compare-card h3,.form-card h3,.about-card h3,.network-card h3,.rating-card h3{margin:0 0 10px;font-size:18px}
    .section-card p,.info-card p,.review-card p,.case-card p,.article-card p,.step-card p,.price-card p,.compare-card p,.form-card p,.about-card p,.network-card p,.rating-card p{margin:0;color:var(--muted);line-height:1.75}
    .chips{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}
    .chip{padding:7px 11px;border-radius:999px;background:#f4f7ff;border:1px solid var(--line);font-size:13px;color:#32405e}
    .timeline{display:grid;gap:12px}
    .timeline li{list-style:none;padding:14px 16px;border:1px solid var(--line);border-radius:16px;background:#fff}
    .timeline strong{display:block;margin-bottom:5px}
    .timeline span{color:var(--muted);font-size:13px;line-height:1.6}
    .table-wrap{overflow:auto;border-radius:18px;border:1px solid var(--line);background:#fff}
    table{width:100%;border-collapse:collapse;min-width:820px}
    th,td{padding:14px 14px;border-bottom:1px solid #edf1f7;text-align:left;vertical-align:top}
    th{background:#f7f9ff;font-size:14px}
    td{font-size:14px;color:#344057;line-height:1.65}
    .good{color:#0b7d74;font-weight:700}
    .bad{color:#c4512c;font-weight:700}
    .faq-list{display:grid;gap:12px}
    .faq-item{overflow:hidden}
    .faq-q{
      width:100%;border:0;background:transparent;padding:18px 18px;display:flex;align-items:center;justify-content:space-between;gap:16px;
      text-align:left;font-size:16px;font-weight:700;color:var(--text);cursor:pointer
    }
    .faq-q span:last-child{color:var(--primary);font-size:20px;line-height:1}
    .faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease;padding:0 18px}
    .faq-a p{margin:0 0 18px;color:var(--muted);line-height:1.8}
    .faq-item.open .faq-a{max-height:220px}
    .faq-item.open .faq-q span:last-child{transform:rotate(45deg)}
    .reviews,.cases,.articles,.network,.values{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}
    .stars{color:#ff9f1a;letter-spacing:1px}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag-cloud a{padding:10px 12px;border-radius:999px;background:linear-gradient(135deg,#fff,#f5f8ff);border:1px solid var(--line);font-size:13px;color:#344057;transition:.2s ease}
    .tag-cloud a:hover{transform:translateY(-2px);border-color:rgba(36,92,255,.24);color:var(--primary)}
    .form-grid{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-size:14px;font-weight:700}
    input,select,textarea{
      width:100%;padding:13px 14px;border-radius:14px;border:1px solid var(--line);background:#fff;
      font:inherit;color:var(--text);outline:none;transition:.2s ease
    }
    input:focus,select:focus,textarea:focus{border-color:rgba(36,92,255,.5);box-shadow:0 0 0 4px rgba(36,92,255,.08)}
    textarea{min-height:120px;resize:vertical}
    .submit-row{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;margin-top:14px}
    .footer{
      margin-top:24px;padding:24px 0 28px;border-top:1px solid rgba(217,224,240,.9);
      background:linear-gradient(180deg, rgba(255,255,255,.7), rgba(247,248,252,.9));
      color:var(--text)
    }
    .footer a{color:#264fe1}
    .footer-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:18px;align-items:start}
    .footer small{color:var(--muted);line-height:1.8}
    .footer-links{display:flex;flex-wrap:wrap;gap:10px;margin-top:12px}
    .footer-links a{padding:8px 10px;border-radius:999px;background:#fff;border:1px solid var(--line);font-size:13px}
    .qrcode{display:flex;align-items:center;gap:14px;flex-wrap:wrap}
    .qrcode img{width:118px;height:118px;object-fit:cover;border-radius:16px;border:1px solid var(--line);background:#fff}
    .float-tools{
      position:fixed;right:16px;bottom:18px;z-index:60;display:flex;flex-direction:column;gap:10px
    }
    .float-tools a,.float-tools button{
      width:48px;height:48px;border-radius:50%;border:1px solid rgba(255,255,255,.45);
      background:linear-gradient(135deg,var(--primary),#7c4dff);color:#fff;box-shadow:0 16px 32px rgba(36,92,255,.22);
      display:grid;place-items:center;cursor:pointer
    }
    .reveal{opacity:0;transform:translateY(18px);transition:.55s ease}
    .reveal.show{opacity:1;transform:none}
    .ai-page-image{border-radius:18px;border:1px solid var(--line);box-shadow:var(--shadow)}
    .ai-page-home-link{font-weight:700}
    @media (max-width: 980px){
      .hero-inner,.footer-grid,.grid-4,.grid-3,.reviews,.cases,.articles,.network,.values{grid-template-columns:1fr}
      .section-head{align-items:flex-start;flex-direction:column}
      .nav-links{display:none}
      .menu-toggle{display:inline-grid}
      .nav.open .nav-links{
        display:flex;position:absolute;left:16px;right:16px;top:76px;flex-direction:column;align-items:flex-start;
        padding:14px;background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow)
      }
      .nav.open .nav-actions{display:none}
      .hero-copy,.hero-panel{padding:22px}
    }
    @media (max-width: 640px){
      .container{width:min(var(--container), calc(100% - 24px))}
      .hero{padding-top:18px}
      .hero-points,.metric-grid,.form-grid{grid-template-columns:1fr}
      .hero-actions,.submit-row{flex-direction:column;align-items:stretch}
      .btn{width:100%}
      h1{font-size:30px}
      .section-head h2{font-size:24px}
      .float-tools{right:12px;bottom:12px}
    }