:root{
      --bg:#f7f8fc;
      --panel:#ffffff;
      --panel-2:#fff8ee;
      --text:#182033;
      --muted:#5d6478;
      --line:#e8eaf2;
      --brand:#6a5cff;
      --brand-2:#ff7a59;
      --accent:#25b6a4;
      --warm:#ffd86b;
      --shadow:0 18px 50px rgba(38,47,87,.10);
      --radius:22px;
      --radius-sm:16px;
      --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(255,122,89,.10), transparent 30%),
        radial-gradient(circle at top right, rgba(106,92,255,.10), transparent 28%),
        linear-gradient(180deg,#fbfcff 0%, #f6f8fd 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:40;
      backdrop-filter:saturate(150%) blur(14px);
      background:rgba(251,252,255,.82);
      border-bottom:1px solid rgba(232,234,242,.9);
    }
    .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(0,0,0,.06)}
    .brand-text strong{display:block;font-size:18px;line-height:1.1}
    .brand-text span{display:block;font-size:12px;color:var(--muted);margin-top:4px}
    .nav-links{display:flex;flex-wrap:wrap;gap:4px 10px;align-items:center;justify-content:flex-end}
    .nav-links a{
      font-size:14px;color:var(--muted);padding:10px 12px;border-radius:999px;transition:.25s ease;
    }
    .nav-links a:hover,.nav-links a.active{background:#eef0ff;color:#2d2b63}
    .menu-btn{
      display:none;border:1px solid var(--line);background:#fff;color:var(--text);
      padding:10px 12px;border-radius:12px;font-size:14px;align-items:center;gap:8px;
    }
    .hero{padding:34px 0 18px}
    .hero-grid{
      display:grid;grid-template-columns:1.2fr .8fr;gap:20px;align-items:stretch;
    }
    .hero-main,.hero-side,.card,.panel,.faq-item,.review,.article-item,.timeline-item,.pricing{
      background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);
    }
    .hero-main{
      position:relative;overflow:hidden;padding:34px;
      background:
        radial-gradient(circle at 18% 24%, rgba(255,216,107,.45), transparent 16%),
        radial-gradient(circle at 82% 18%, rgba(37,182,164,.18), transparent 18%),
        linear-gradient(135deg,#ffffff 0%, #fff7ef 100%);
    }
    .hero-main::after{
      content:"";position:absolute;inset:auto -80px -90px auto;width:260px;height:260px;border-radius:50%;
      background:linear-gradient(135deg,rgba(106,92,255,.16),rgba(255,122,89,.12));filter:blur(12px);
    }
    .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;background:#fff;color:#4e57a2;font-size:13px;font-weight:700;box-shadow:0 8px 24px rgba(106,92,255,.10)}
    h1{margin:16px 0 12px;font-size:clamp(32px,4vw,56px);line-height:1.08;letter-spacing:-.03em}
    .lead{margin:0;color:var(--muted);font-size:16px;line-height:1.8;max-width:60ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;cursor:pointer;
      padding:13px 18px;border-radius:14px;font-weight:700;transition:.25s ease;min-height:48px;
    }
    .btn-primary{background:linear-gradient(135deg,var(--brand),#8d7bff);color:#fff;box-shadow:0 14px 30px rgba(106,92,255,.28)}
    .btn-secondary{background:#fff;border:1px solid var(--line);color:var(--text)}
    .btn:hover{transform:translateY(-2px)}
    .hero-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:24px}
    .stat{padding:16px;border-radius:18px;background:rgba(255,255,255,.82);border:1px solid rgba(232,234,242,.95)}
    .stat strong{display:block;font-size:22px}
    .stat span{display:block;font-size:13px;color:var(--muted);margin-top:6px;line-height:1.5}
    .hero-side{padding:20px;background:linear-gradient(180deg,#fff 0%,#fff9f3 100%)}
    .side-top{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:14px}
    .badge{display:inline-flex;padding:8px 10px;border-radius:999px;background:#eefbf8;color:#157a6d;font-size:12px;font-weight:700}
    .side-list{display:grid;gap:12px}
    .mini{
      padding:14px;border-radius:16px;background:#fff;border:1px solid var(--line)
    }
    .mini strong{display:block;margin-bottom:4px}
    .mini p{margin:0;color:var(--muted);font-size:13px;line-height:1.65}
    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:28px}
    .section-head p{margin:0;color:var(--muted);max-width:68ch;line-height:1.7}
    .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:0 0 8px;font-size:18px}
    .card p,.card li{color:var(--muted);line-height:1.72}
    .pill-row{display:flex;flex-wrap:wrap;gap:10px}
    .pill{padding:9px 12px;border-radius:999px;background:#f4f6ff;border:1px solid #e5e8ff;font-size:13px;color:#3b4478}
    .media-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:16px}
    .panel{padding:22px}
    .panel h3{margin-top:0}
    .steps{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .step{padding:18px;background:linear-gradient(180deg,#fff 0%,#fffaf5 100%);border:1px solid var(--line);border-radius:18px}
    .step .num{display:inline-flex;width:34px;height:34px;border-radius:50%;align-items:center;justify-content:center;background:linear-gradient(135deg,#ffe39a,#ffd067);font-weight:800;margin-bottom:10px}
    .comparison{overflow:auto}
    table{width:100%;border-collapse:separate;border-spacing:0;min-width:760px}
    th,td{padding:14px 12px;border-bottom:1px solid var(--line);text-align:left;font-size:14px;vertical-align:top}
    th{background:#f8f9ff;color:#24304f;position:sticky;top:0}
    .score{
      display:inline-flex;align-items:center;gap:8px;padding:10px 14px;border-radius:999px;background:#fff2f2;border:1px solid #ffd7d7;color:#a12b2b;font-weight:700
    }
    .rating{font-size:22px;color:#ff9a18;letter-spacing:2px}
    .timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .timeline-item{padding:18px;position:relative}
    .timeline-item::before{content:"";position:absolute;left:18px;top:18px;width:10px;height:10px;border-radius:50%;background:var(--brand-2);box-shadow:0 0 0 6px rgba(255,122,89,.12)}
    .timeline-item h3{padding-left:24px;margin-top:0}
    .timeline-item p{margin-bottom:0;color:var(--muted);line-height:1.72}
    .reviews,.articles,.faq-wrap,.pricing-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .review{padding:20px}
    .review .meta{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:10px}
    .avatar{width:42px;height:42px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;font-weight:800;color:#fff;background:linear-gradient(135deg,var(--brand),var(--brand-2))}
    .review p{margin:10px 0 0;color:var(--muted);line-height:1.75}
    .article-item{padding:18px}
    .article-item time{font-size:12px;color:var(--brand);font-weight:700}
    .article-item h3{margin:10px 0 8px}
    .article-item p{margin:0;color:var(--muted);line-height:1.7}
    .faq-item{padding:0;overflow:hidden}
    .faq-q{
      width:100%;padding:18px 20px;background:#fff;border:0;text-align:left;color:var(--text);font-weight:700;font-size:16px;
      display:flex;align-items:center;justify-content:space-between;gap:14px;cursor:pointer
    }
    .faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease;padding:0 20px}
    .faq-item.open .faq-a{padding:0 20px 18px;max-height:220px}
    .faq-a p{margin:0;color:var(--muted);line-height:1.75}
    .faq-q span{transition:transform .25s ease}
    .faq-item.open .faq-q span{transform:rotate(45deg)}
    .form-wrap{display:grid;grid-template-columns:1fr .9fr;gap:16px}
    form{display:grid;gap:12px}
    .field{display:grid;gap:8px}
    label{font-size:14px;font-weight:700;color:#26304a}
    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:border-color .2s, box-shadow .2s;
    }
    textarea{min-height:128px;resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:#b8afff;box-shadow:0 0 0 4px rgba(106,92,255,.10)}
    .contact-box{display:grid;gap:12px}
    .contact-grid{display:grid;gap:12px}
    .contact-line{padding:14px 16px;border-radius:16px;background:#fffaf4;border:1px solid #f2e7d8}
    .contact-line strong{display:block;margin-bottom:4px}
    .qrcode{display:grid;grid-template-columns:120px 1fr;gap:14px;align-items:center}
    .qrcode img{width:120px;height:120px;object-fit:cover;border-radius:18px;border:1px solid var(--line);background:#fff}
    .footer{
      margin-top:18px;padding:26px 0 32px;border-top:1px solid var(--line);
      background:linear-gradient(180deg,#fff 0%,#f8f9fd 100%);color:var(--text)
    }
    .footer-grid{display:grid;grid-template-columns:1.1fr .9fr .9fr;gap:16px}
    .footer a{color:#3340a0}
    .footer small{color:var(--muted)}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag-cloud a{padding:10px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);color:#47506f;font-size:13px}
    .sticky-tools{
      position:fixed;right:16px;bottom:16px;z-index:50;display:grid;gap:10px
    }
    .tool{
      width:52px;height:52px;border-radius:16px;display:flex;align-items:center;justify-content:center;
      background:linear-gradient(135deg,var(--brand),#8d7bff);color:#fff;box-shadow:0 16px 30px rgba(106,92,255,.28);font-weight:800
    }
    .tool.secondary{background:linear-gradient(135deg,var(--brand-2),#ff9b78)}
    .reveal{opacity:0;transform:translateY(16px);transition:.6s ease}
    .reveal.in{opacity:1;transform:none}
    .hero-image-stack{display:grid;grid-template-columns:1fr 1fr;gap:14px}
    .hero-image-stack img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:18px;border:1px solid var(--line)}
    .split-list{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
    .split-list div{padding:12px 14px;border-radius:14px;background:#f8f9ff;border:1px solid #e9ebfb;color:#35405f}
    .table-note{margin-top:10px;color:var(--muted);font-size:13px}
    @media (max-width: 1024px){
      .hero-grid,.media-grid,.form-wrap,.footer-grid,.grid-4,.timeline,.reviews,.articles,.faq-wrap,.pricing-grid,.steps,.grid-3{grid-template-columns:1fr 1fr}
      .hero-main{padding:28px}
    }
    @media (max-width: 768px){
      .menu-btn{display:inline-flex}
      .nav-links{display:none;width:100%;padding-top:8px}
      .nav-links.open{display:flex;flex-direction:column;align-items:flex-start;background:#fff;border:1px solid var(--line);border-radius:18px;padding:10px}
      .nav{flex-wrap:wrap}
      .hero-grid,.media-grid,.form-wrap,.footer-grid,.grid-4,.timeline,.reviews,.articles,.faq-wrap,.pricing-grid,.steps,.grid-3,.hero-stats,.split-list{grid-template-columns:1fr}
      .hero-main{padding:22px}
      .section-head{flex-direction:column;align-items:flex-start}
      .qrcode{grid-template-columns:1fr}
      .qrcode img{width:150px;height:150px}
    }