:root{
      --bg:#f6f8fc;
      --bg2:#ffffff;
      --card:#ffffff;
      --text:#172033;
      --muted:#5c6b84;
      --line:#dbe3f0;
      --primary:#ff5c7a;
      --primary2:#2f6bff;
      --accent:#ffb347;
      --green:#14b8a6;
      --shadow:0 14px 40px rgba(18, 36, 84, .10);
      --radius:22px;
      --radius-sm:16px;
      --container:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:system-ui,-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(255,92,122,.10), transparent 30%),
        radial-gradient(circle at top right, rgba(47,107,255,.10), transparent 28%),
        linear-gradient(180deg, #f9fbff 0%, #f5f7fb 100%);
      line-height:1.7;
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{max-width:var(--container);margin:0 auto;padding:0 20px}
    .site-header{
      position:sticky;top:0;z-index:50;
      background:rgba(246,248,252,.82);
      backdrop-filter:blur(16px);
      border-bottom:1px solid rgba(219,227,240,.85);
    }
    .nav{
      display:flex;align-items:center;justify-content:space-between;gap:16px;
      min-height:74px;
    }
    .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 6px 18px rgba(47,107,255,.12)}
    .brand strong{display:block;font-size:1.02rem;letter-spacing:.4px}
    .brand span{display:block;font-size:.82rem;color:var(--muted)}
    .menu-toggle{
      display:none;border:1px solid var(--line);background:#fff;color:var(--text);
      border-radius:14px;padding:10px 12px;cursor:pointer;
    }
    .nav-links{display:flex;align-items:center;gap:18px;flex-wrap:wrap;justify-content:flex-end}
    .nav-links a{font-size:.95rem;color:#2a3550;padding:8px 10px;border-radius:10px;transition:.2s}
    .nav-links a:hover{background:rgba(47,107,255,.08);color:var(--primary2)}
    .nav-cta{
      display:inline-flex;align-items:center;gap:8px;background:linear-gradient(135deg,var(--primary),#ff7d59);
      color:#fff;padding:11px 16px;border-radius:999px;font-weight:700;box-shadow:0 10px 20px rgba(255,92,122,.26);
      transition:.2s transform,.2s box-shadow;
    }
    .nav-cta:hover,.btn:hover,.btn-outline:hover{transform:translateY(-2px)}
    .hero{padding:34px 0 18px}
    .hero-grid{
      display:grid;grid-template-columns:1.2fr .8fr;gap:22px;align-items:stretch;
    }
    .hero-copy,.hero-panel,.card,.section-card,.review,.faq-item,.form-card,.article-card,.compare-box,.timeline-item,.price-card{
      background:linear-gradient(180deg,rgba(255,255,255,.96),rgba(255,255,255,.92));
      border:1px solid rgba(219,227,240,.9);
      box-shadow:var(--shadow);
      border-radius:var(--radius);
    }
    .hero-copy{padding:34px;position:relative;overflow:hidden}
    .hero-copy:before{
      content:"";position:absolute;inset:auto -80px -60px auto;width:220px;height:220px;border-radius:50%;
      background:radial-gradient(circle, rgba(255,92,122,.18), rgba(255,92,122,0) 70%);
    }
    .eyebrow{
      display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;
      background:rgba(255,92,122,.10);color:#bf2847;font-weight:700;font-size:.88rem;
    }
    h1{margin:14px 0 12px;font-size:clamp(2rem,4vw,3.6rem);line-height:1.08}
    .hero-copy p{margin:0 0 18px;color:var(--muted);font-size:1.02rem;max-width:56ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin:22px 0}
    .btn,.btn-outline{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 18px;border-radius:14px;font-weight:700;
      border:1px solid transparent;transition:.2s;min-height:46px;
    }
    .btn{background:linear-gradient(135deg,var(--primary2),#5c8bff);color:#fff}
    .btn-outline{background:#fff;color:#23304a;border-color:var(--line)}
    .hero-tags{display:flex;flex-wrap:wrap;gap:10px}
    .tag{
      padding:8px 12px;border-radius:999px;background:#f3f6ff;color:#33415f;border:1px solid #dce5fb;font-size:.88rem;
    }
    .hero-panel{padding:22px;display:grid;gap:14px}
    .mini-stats{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
    .stat{padding:16px;border-radius:18px;background:linear-gradient(180deg,#f7faff,#ffffff);border:1px solid #e1e9f6}
    .stat strong{display:block;font-size:1.35rem}
    .stat span{color:var(--muted);font-size:.88rem}
    section{padding:18px 0}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:14px}
    .section-head h2{margin:0;font-size:1.65rem}
    .section-head p{margin:0;color:var(--muted);max-width:68ch}
    .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .card{padding:20px}
    .card h3{margin:10px 0 8px;font-size:1.08rem}
    .card p,.card li,.section-card p{color:var(--muted)}
    .icon{
      width:46px;height:46px;border-radius:14px;display:grid;place-items:center;
      background:linear-gradient(135deg,rgba(47,107,255,.14),rgba(255,92,122,.14));color:#2340aa;font-size:1.2rem;
    }
    .section-card{padding:22px}
    .feature-list{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-top:14px}
    .feature-list .item{
      padding:14px 14px 14px 16px;border:1px solid #e4ebf7;border-radius:16px;background:#fbfcff
    }
    .feature-list .item strong{display:block;margin-bottom:4px}
    .workflow{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .step{
      padding:18px;border-radius:18px;background:#fff;border:1px solid #e3eaf7;position:relative
    }
    .step b{display:inline-flex;width:30px;height:30px;align-items:center;justify-content:center;border-radius:999px;background:#eef3ff;color:var(--primary2);margin-bottom:10px}
    .compare-wrap,.table-wrap{overflow:auto}
    table{width:100%;border-collapse:collapse;min-width:780px;background:#fff}
    th,td{padding:14px 12px;border-bottom:1px solid #e7edf8;text-align:left;vertical-align:top}
    th{background:#f6f9ff;color:#24314a;font-size:.94rem}
    .badge{display:inline-flex;align-items:center;padding:6px 10px;border-radius:999px;font-size:.82rem;font-weight:700}
    .badge.hot{background:rgba(255,92,122,.12);color:#ba2b49}
    .badge.ok{background:rgba(20,184,166,.12);color:#0d7f72}
    .badge.warn{background:rgba(255,179,71,.16);color:#9a5d00}
    .split{
      display:grid;grid-template-columns:1.05fr .95fr;gap:16px;align-items:start
    }
    .compare-box h3,.form-card h3,.article-card h3,.price-card h3{margin-top:0}
    .list{margin:12px 0 0;padding:0;list-style:none;display:grid;gap:10px}
    .list li{display:flex;gap:10px;align-items:flex-start}
    .list li:before{content:"•";color:var(--primary);font-weight:700}
    .price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .price-card{padding:20px}
    .price-card .price{font-size:2rem;font-weight:800;color:#12203b;margin:6px 0}
    .price-card ul{padding-left:18px;color:var(--muted)}
    .timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .timeline-item{padding:18px}
    .timeline-item .num{font-weight:800;color:var(--primary2)}
    .reviews{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .review{padding:18px}
    .review .meta{display:flex;justify-content:space-between;gap:10px;margin-top:14px;color:var(--muted);font-size:.9rem}
    .faq{display:grid;gap:12px}
    .faq-item{padding:0;overflow:hidden}
    .faq-q{
      width:100%;border:0;background:transparent;padding:18px 20px;font-size:1rem;font-weight:700;color:var(--text);
      display:flex;justify-content:space-between;align-items:center;cursor:pointer;text-align:left
    }
    .faq-a{padding:0 20px 18px;color:var(--muted);display:none}
    .faq-item.open .faq-a{display:block}
    .faq-item.open .faq-q{background:#f8fbff}
    .article-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .article-card{padding:18px}
    .article-card .meta{color:var(--muted);font-size:.88rem;margin-top:8px}
    .form-card form{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    .field{display:grid;gap:8px}
    .field.full{grid-column:1/-1}
    label{font-weight:700;font-size:.94rem}
    input,select,textarea{
      width:100%;border:1px solid #d9e2f1;background:#fff;border-radius:14px;padding:13px 14px;font:inherit;color:var(--text);
      outline:none;transition:.2s border-color,.2s box-shadow
    }
    input:focus,select:focus,textarea:focus{border-color:rgba(47,107,255,.55);box-shadow:0 0 0 4px rgba(47,107,255,.10)}
    textarea{min-height:130px;resize:vertical}
    .submit-row{grid-column:1/-1;display:flex;gap:12px;flex-wrap:wrap;align-items:center}
    .contact-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:16px;align-items:start}
    .qr-box{display:grid;grid-template-columns:120px 1fr;gap:16px;align-items:center}
    .qr-box img{width:120px;height:120px;object-fit:cover;border-radius:16px;border:1px solid #e4ebf7;background:#fff}
    .floating{
      position:fixed;right:16px;bottom:16px;z-index:60;display:grid;gap:10px
    }
    .floating a,.floating button{
      border:0;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:8px;
      padding:12px 14px;border-radius:999px;background:#fff;color:#22314a;border:1px solid #dbe3f0;box-shadow:var(--shadow);font-weight:700
    }
    footer{margin-top:10px;padding:22px 0 28px;border-top:1px solid rgba(219,227,240,.9);background:#f2f6fc;color:#22314a}
    footer a{color:#1f4ed8}
    .footer-grid{display:grid;grid-template-columns:1.1fr .9fr 1fr;gap:16px;align-items:start}
    .footer-note{color:#5c6b84;font-size:.92rem}
    .link-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .link-cloud a,.cloud-tag{
      padding:8px 12px;border-radius:999px;background:#fff;border:1px solid #e0e8f4;color:#2f3d5b
    }
    .scroll-top{position:fixed;right:16px;bottom:72px;z-index:60;opacity:0;pointer-events:none;transition:.2s}
    .scroll-top.show{opacity:1;pointer-events:auto}
    .muted{color:var(--muted)}
    .pill-row{display:flex;flex-wrap:wrap;gap:10px}
    .kicker{display:inline-flex;padding:7px 10px;border-radius:999px;background:#edf4ff;color:#2f5dff;font-size:.84rem;font-weight:700}
    .reveal{opacity:0;transform:translateY(18px);transition:.55s ease}
    .reveal.in{opacity:1;transform:none}
    @media (max-width: 980px){
      .hero-grid,.split,.contact-grid,.footer-grid,.grid-3,.grid-4,.workflow,.timeline,.reviews,.article-grid,.price-grid{grid-template-columns:1fr 1fr}
      .feature-list{grid-template-columns:1fr}
      .form-card form{grid-template-columns:1fr}
    }
    @media (max-width: 720px){
      .menu-toggle{display:inline-flex}
      .nav{position:relative}
      .nav-links{
        display:none;position:absolute;left:0;right:0;top:74px;background:#fff;border:1px solid #dbe3f0;border-radius:18px;
        padding:14px;box-shadow:var(--shadow);flex-direction:column;align-items:flex-start
      }
      .nav-links.open{display:flex}
      .hero-grid,.split,.contact-grid,.footer-grid,.grid-3,.grid-4,.workflow,.timeline,.reviews,.article-grid,.price-grid,.mini-stats{grid-template-columns:1fr}
      .hero-copy{padding:24px}
      .section-head{flex-direction:column;align-items:flex-start}
      .qr-box{grid-template-columns:1fr}
      .floating{right:12px;bottom:12px}
      .floating a,.floating button{padding:11px 12px}
    }