:root{
      --bg:#f6f8fc;
      --bg2:#eef4ff;
      --card:#ffffff;
      --text:#122033;
      --muted:#5b6b84;
      --line:#dbe4f2;
      --primary:#ff3b7a;
      --primary2:#0066ff;
      --accent:#ff9f1a;
      --shadow:0 18px 40px rgba(17,32,51,.08);
      --radius:22px;
      --container:1180px;
    }
    *{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",sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(255,59,122,.14), transparent 25%),
        radial-gradient(circle at 85% 10%, rgba(0,102,255,.14), transparent 22%),
        linear-gradient(180deg, #ffffff 0%, var(--bg) 42%, #f7f9fe 100%);
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%;height:auto}
    .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(255,255,255,.84);
      border-bottom:1px solid rgba(219,228,242,.7);
    }
    .nav{
      display:flex;align-items:center;justify-content:space-between;gap:16px;
      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 20px rgba(0,0,0,.06)}
    .brand h1{font-size:16px;line-height:1.2;margin:0;font-weight:800;letter-spacing:.2px}
    .brand p{margin:3px 0 0;color:var(--muted);font-size:12px}
    .nav-links{display:flex;align-items:center;gap:18px;flex-wrap:wrap;justify-content:flex-end}
    .nav-links a{font-size:14px;color:#2a3a52;font-weight:600;opacity:.92}
    .nav-cta{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:.25s ease;
      cursor:pointer;white-space:nowrap
    }
    .btn-primary{background:linear-gradient(135deg,var(--primary),#ff6a3d);color:#fff;box-shadow:0 12px 28px rgba(255,59,122,.25)}
    .btn-outline{background:#fff;border-color:var(--line);color:var(--text)}
    .btn:hover{transform:translateY(-2px);box-shadow:0 14px 28px rgba(15,23,42,.12)}
    .menu-toggle{display:none;background:#fff;border:1px solid var(--line);border-radius:14px;padding:10px 12px}
    .hero{padding:30px 0 20px}
    .hero-grid{
      display:grid;grid-template-columns:1.15fr .85fr;gap:22px;align-items:stretch
    }
    .hero-main,.hero-side,.panel,.section-card,.faq-item,.review-card,.article-card,.contact-card,.price-box{
      background:rgba(255,255,255,.9);border:1px solid rgba(219,228,242,.9);border-radius:var(--radius);box-shadow:var(--shadow)
    }
    .hero-main{padding:34px;position:relative;overflow:hidden}
    .hero-main:before,.hero-main:after{
      content:"";position:absolute;border-radius:50%;filter:blur(4px);pointer-events:none
    }
    .hero-main:before{width:220px;height:220px;background:radial-gradient(circle, rgba(255,59,122,.18), transparent 60%);right:-70px;top:-60px}
    .hero-main:after{width:180px;height:180px;background:radial-gradient(circle, rgba(0,102,255,.14), transparent 62%);left:-60px;bottom:-70px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;background:#fff3f7;color:#c31453;border:1px solid #ffd1e0;padding:7px 12px;border-radius:999px;font-size:13px;font-weight:700}
    .hero h2{font-size:44px;line-height:1.08;margin:18px 0 14px;letter-spacing:-.6px}
    .hero p{margin:0;color:var(--muted);font-size:16px;line-height:1.8;max-width:58ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
    .hero-points{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
    .chip{padding:9px 12px;border-radius:999px;background:#f4f7ff;border:1px solid #dce6fb;color:#254066;font-size:13px;font-weight:700}
    .hero-side{padding:22px;display:grid;gap:14px}
    .mini-stat{padding:16px;border-radius:18px;background:linear-gradient(180deg,#ffffff,#f7faff);border:1px solid var(--line)}
    .mini-stat strong{display:block;font-size:24px;margin-bottom:4px}
    .mini-stat span{color:var(--muted);font-size:13px}
    .home-link-box{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:16px;border-radius:18px;background:linear-gradient(135deg,#eef4ff,#fff2f6);border:1px solid #dde8ff}
    .section{padding:20px 0}
    .section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:16px}
    .section-head h3{margin:0;font-size:28px;line-height:1.2}
    .section-head p{margin:0;color:var(--muted);max-width:70ch}
    .grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
    .metric,.service,.step,.case,.review-card,.article-card,.faq-item,.contact-card,.price-box{padding:20px}
    .metric strong{font-size:28px;display:block}
    .metric span,.service p,.step p,.case p,.review-card p,.article-card p,.contact-card p{color:var(--muted);line-height:1.7}
    .service h4,.step h4,.case h4,.review-card h4,.article-card h4,.contact-card h4{margin:0 0 10px;font-size:18px}
    .icon{
      width:44px;height:44px;border-radius:14px;display:grid;place-items:center;
      background:linear-gradient(135deg,rgba(255,59,122,.12),rgba(0,102,255,.12));color:#233a5d;font-weight:800;margin-bottom:14px
    }
    .section-card{padding:22px}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag-cloud span{padding:9px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);color:#27415f;font-size:13px}
    .comparison-wrap{overflow:auto;border-radius:20px;border:1px solid var(--line);background:#fff}
    table{width:100%;border-collapse:collapse;min-width:760px}
    th,td{padding:14px 16px;border-bottom:1px solid #edf2f8;text-align:left;vertical-align:top;font-size:14px}
    th{background:#f8fbff;color:#24344b}
    .highlight{color:#d61d57;font-weight:800}
    .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;gap:12px;font-size:16px;font-weight:700;color:var(--text);cursor:pointer;text-align:left}
    .faq-a{display:none;padding:0 20px 18px;color:var(--muted);line-height:1.8}
    .faq-item.open .faq-a{display:block}
    .faq-item.open .faq-q .chev{transform:rotate(180deg)}
    .chev{transition:.2s ease}
    .timeline{display:grid;gap:12px}
    .timeline-item{display:grid;grid-template-columns:110px 1fr;gap:14px;padding:14px 0;border-bottom:1px dashed #e7edf7}
    .timeline-item:last-child{border-bottom:0}
    .timeline-item b{color:#1d3350}
    .comments{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .review-meta{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:10px}
    .stars{color:#ffb200;font-size:14px;letter-spacing:1px}
    .articles{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .article-card a{color:#0a58ca;font-weight:700}
    .gallery{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
    .gallery .img-box{border-radius:20px;overflow:hidden;border:1px solid var(--line);background:#fff}
    .gallery .img-box img{width:100%;aspect-ratio:16/9;object-fit:cover}
    .contact-wrap{display:grid;grid-template-columns:1.05fr .95fr;gap:16px;align-items:start}
    form{display:grid;gap:12px}
    .field{display:grid;gap:6px}
    label{font-size:13px;font-weight:700;color:#30425f}
    input,select,textarea{
      width:100%;border:1px solid var(--line);border-radius:14px;background:#fff;padding:13px 14px;
      font:inherit;color:var(--text);outline:none;transition:.2s ease
    }
    input:focus,select:focus,textarea:focus{border-color:#8db6ff;box-shadow:0 0 0 4px rgba(0,102,255,.08)}
    textarea{min-height:122px;resize:vertical}
    .footer{
      margin-top:18px;padding:26px 0 22px;background:#0d1b30;color:#d7e3f8;border-top:1px solid rgba(255,255,255,.06)
    }
    .footer a{color:#ffffff}
    .footer .muted{color:#b8c6dc}
    .footer-grid{display:grid;grid-template-columns:1.1fr .9fr .9fr;gap:18px}
    .footer small{display:block;margin-top:14px;color:#9fb0cf;line-height:1.7}
    .float-contact{
      position:fixed;right:16px;bottom:18px;z-index:60;display:grid;gap:10px
    }
    .float-contact a,.backtop{
      width:52px;height:52px;border-radius:16px;display:grid;place-items:center;
      background:linear-gradient(135deg,var(--primary2),#33a1ff);color:#fff;box-shadow:0 14px 30px rgba(0,102,255,.28)
    }
    .backtop{border:0;cursor:pointer}
    .float-contact a:nth-child(2){background:linear-gradient(135deg,#08c47d,#29d68f)}
    .float-contact a:nth-child(3){background:linear-gradient(135deg,#ff8a00,#ff4d4f)}
    .float-contact img{width:28px;height:28px;object-fit:cover;border-radius:6px}
    .mobile-panel{display:none}
    .price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .price-box strong{font-size:24px}
    .note{color:var(--muted);font-size:13px;line-height:1.7}
    .scroll-into{opacity:0;transform:translateY(14px);transition:.6s ease}
    .scroll-into.show{opacity:1;transform:none}
    @media (max-width: 1080px){
      .hero-grid,.contact-wrap,.footer-grid,.grid-4,.grid-3,.comments,.articles,.price-grid,.grid-2{grid-template-columns:1fr 1fr}
      .hero h2{font-size:38px}
      .nav-links{display:none}
      .menu-toggle{display:inline-flex}
      .mobile-panel.open{display:block}
    }
    @media (max-width: 720px){
      .container{width:min(var(--container), calc(100% - 24px))}
      .hero-grid,.contact-wrap,.footer-grid,.grid-4,.grid-3,.comments,.articles,.price-grid,.grid-2,.gallery{grid-template-columns:1fr}
      .hero-main{padding:24px}
      .hero h2{font-size:32px}
      .section-head{align-items:flex-start;flex-direction:column}
      .timeline-item{grid-template-columns:1fr}
      .nav{padding:12px 0}
      .brand h1{font-size:15px}
      .hero-actions,.hero-points{gap:10px}
      .btn{width:100%}
      .nav-cta{display:none}
      .mobile-panel{padding:0 0 14px}
      .mobile-panel .panel-inner{display:grid;gap:10px;padding:14px 0 0}
      .mobile-panel a{padding:12px 14px;border-radius:14px;background:#fff;border:1px solid var(--line);font-weight:700}
    }