:root{
      --bg:#f6f7fb;
      --panel:#ffffff;
      --panel2:#fff7f2;
      --text:#1d2433;
      --muted:#5f6b7b;
      --line:#e8ecf3;
      --brand:#ff4d6d;
      --brand2:#6c63ff;
      --brand3:#ffb703;
      --shadow:0 18px 45px rgba(23,32,56,.08);
      --radius:20px;
      --radius-sm:14px;
      --max: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;background:
      radial-gradient(circle at 10% 10%, rgba(255,77,109,.09), transparent 26%),
      radial-gradient(circle at 90% 15%, rgba(108,99,255,.10), transparent 24%),
      linear-gradient(180deg,#fff 0%, #fbfbfe 34%, #f6f7fb 100%);color:var(--text)}
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(var(--max), calc(100% - 32px));margin:0 auto}
    .topbar{position:sticky;top:0;z-index:50;backdrop-filter:blur(14px);background:rgba(255,255,255,.82);border-bottom:1px solid rgba(232,236,243,.8)}
    .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:44px;height:44px;object-fit:contain;border-radius:12px;background:#fff;border:1px solid var(--line);padding:4px;box-shadow:0 10px 20px rgba(0,0,0,.05)}
    .brand-text{min-width:0}
    .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}
    .menu-toggle{display:none;border:1px solid var(--line);background:#fff;border-radius:12px;padding:10px 12px;color:var(--text)}
    .nav-links{display:flex;align-items:center;gap:18px;flex-wrap:wrap;justify-content:flex-end}
    .nav-links a{font-size:14px;color:#2b3444;padding:8px 10px;border-radius:10px;transition:.2s}
    .nav-links a:hover{background:#f3f5fb;color:#000}
    .nav-cta{display:flex;align-items:center;gap:10px}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;border-radius:999px;padding:13px 18px;font-weight:700;cursor:pointer;transition:.22s;box-shadow:none}
    .btn-primary{background:linear-gradient(135deg,var(--brand),#ff7a59);color:#fff;box-shadow:0 14px 30px rgba(255,77,109,.25)}
    .btn-secondary{background:#fff;border:1px solid var(--line);color:var(--text)}
    .btn:hover{transform:translateY(-2px);box-shadow:0 16px 30px rgba(17,24,39,.10)}
    header.hero{padding:30px 0 16px}
    .hero-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:20px;align-items:stretch}
    .hero-main{background:linear-gradient(135deg,#111827 0%, #231f49 35%, #4b1f57 70%, #ff4d6d 120%);color:#fff;border-radius:28px;padding:34px;position:relative;overflow:hidden;box-shadow:var(--shadow)}
    .hero-main:before,.hero-main:after{content:"";position:absolute;border-radius:50%;background:rgba(255,255,255,.12);filter:blur(4px)}
    .hero-main:before{width:180px;height:180px;right:-40px;top:-50px}
    .hero-main:after{width:120px;height:120px;right:80px;bottom:-40px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;background:rgba(255,255,255,.12);font-size:13px}
    h1{margin:16px 0 14px;font-size:clamp(30px,5vw,48px);line-height:1.12;letter-spacing:-.02em}
    .hero-main p{margin:0;color:rgba(255,255,255,.88);font-size:16px;line-height:1.8;max-width:58ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
    .hero-badges{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
    .chip{padding:9px 12px;border-radius:999px;background:rgba(255,255,255,.10);border:1px solid rgba(255,255,255,.16);font-size:13px}
    .hero-side{display:grid;gap:20px}
    .side-card{background:rgba(255,255,255,.92);border:1px solid var(--line);border-radius:24px;padding:22px;box-shadow:var(--shadow)}
    .stat-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-top:14px}
    .stat{background:linear-gradient(180deg,#fff, #f8faff);border:1px solid #edf0f6;border-radius:18px;padding:16px}
    .stat strong{display:block;font-size:26px;line-height:1;color:#111827}
    .stat span{display:block;font-size:13px;color:var(--muted);margin-top:8px;line-height:1.5}
    .hero-side h2{margin:0;font-size:20px}
    .hero-side p{margin:10px 0 0;color:var(--muted);line-height:1.8}
    main{padding:8px 0 40px}
    section{padding:22px 0}
    .section-title{display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:16px}
    .section-title h2{margin:0;font-size:28px;line-height:1.2}
    .section-title 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-2{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
    .card{background:var(--panel);border:1px solid var(--line);border-radius:24px;padding:22px;box-shadow:0 8px 28px rgba(31,41,55,.05);transition:.22s}
    .card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
    .card h3{margin:0 0 10px;font-size:20px}
    .card p,.card li{color:var(--muted);line-height:1.8}
    .list-clean{margin:0;padding:0;list-style:none}
    .list-clean li{padding:10px 0;border-top:1px dashed var(--line)}
    .list-clean li:first-child{border-top:0;padding-top:0}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag{padding:10px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);color:#2b3444;font-size:13px}
    .accent-card{background:linear-gradient(135deg,#fff, #fff5f6);border-color:#ffd7df}
    .steps{counter-reset:s}
    .step{position:relative;padding-left:50px}
    .step:before{counter-increment:s;content:counter(s);position:absolute;left:0;top:0;width:34px;height:34px;border-radius:50%;display:grid;place-items:center;background:linear-gradient(135deg,var(--brand2),var(--brand));color:#fff;font-weight:700}
    .compare-wrap{overflow-x:auto;border-radius:24px;border:1px solid var(--line);background:#fff;box-shadow:var(--shadow)}
    table{width:100%;border-collapse:collapse;min-width:860px}
    th,td{padding:16px 18px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
    th{background:#f8f9fd;font-size:14px}
    td{color:var(--muted);line-height:1.7}
    .score{font-size:34px;font-weight:800;color:#111827}
    .star{color:#ff9f1c;letter-spacing:2px}
    .faq details{background:#fff;border:1px solid var(--line);border-radius:18px;padding:0 18px;box-shadow:0 8px 20px rgba(31,41,55,.04)}
    .faq details+details{margin-top:12px}
    .faq summary{cursor:pointer;list-style:none;padding:18px 0;font-weight:700;display:flex;justify-content:space-between;gap:12px}
    .faq summary::-webkit-details-marker{display:none}
    .faq .answer{padding:0 0 18px;color:var(--muted);line-height:1.85}
    .reviews .card{background:linear-gradient(180deg,#fff, #fafbff)}
    .quote{font-size:14px}
    .quote strong{display:block;color:#111827;margin-bottom:10px}
    .media-row{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
    .media-row .card{overflow:hidden}
    .media-row img{border-radius:18px;border:1px solid var(--line);margin-top:14px}
    .timeline{position:relative;padding-left:24px}
    .timeline:before{content:"";position:absolute;left:8px;top:4px;bottom:4px;width:2px;background:linear-gradient(180deg,var(--brand2),var(--brand))}
    .timeline li{position:relative;padding:0 0 18px 18px}
    .timeline li:before{content:"";position:absolute;left:-3px;top:8px;width:10px;height:10px;background:var(--brand);border-radius:50%;box-shadow:0 0 0 4px rgba(255,77,109,.12)}
    .form-wrap{display:grid;grid-template-columns:1.1fr .9fr;gap:16px}
    form{display:grid;gap:12px}
    .field{display:grid;gap:8px}
    .field label{font-size:14px;font-weight:700}
    .field input,.field select,.field textarea{width:100%;border:1px solid var(--line);background:#fff;border-radius:14px;padding:13px 14px;font:inherit;color:var(--text);outline:none}
    .field textarea{min-height:120px;resize:vertical}
    .field input:focus,.field select:focus,.field textarea:focus{border-color:#ff94a7;box-shadow:0 0 0 4px rgba(255,77,109,.10)}
    .footer{margin-top:10px;padding:24px 0 36px;background:#f3f5fb;border-top:1px solid var(--line);color:#283241}
    .footer a{color:#18315a}
    .footer-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:18px;align-items:start}
    .footer small{color:#607086;line-height:1.8}
    .float-tools{position:fixed;right:16px;bottom:16px;z-index:60;display:grid;gap:10px}
    .float-tools a,.float-tools button{width:48px;height:48px;border-radius:50%;display:grid;place-items:center;border:1px solid var(--line);background:#fff;box-shadow:var(--shadow);cursor:pointer;color:var(--text)}
    .scroll-reveal{opacity:0;transform:translateY(14px);transition:.6s ease}
    .scroll-reveal.visible{opacity:1;transform:none}
    .mobile-panel{display:none}
    .home-link{font-weight:700}
    @media (max-width: 980px){
      .hero-grid,.grid-3,.grid-2,.media-row,.form-wrap,.footer-grid{grid-template-columns:1fr}
      .section-title{align-items:flex-start;flex-direction:column}
      .nav-links{display:none}
      .menu-toggle{display:inline-flex}
      .nav.open .nav-links{display:flex;position:absolute;left:16px;right:16px;top:68px;flex-direction:column;align-items:stretch;background:#fff;border:1px solid var(--line);border-radius:18px;padding:10px;box-shadow:var(--shadow)}
      .nav.open{position:relative}
      .nav-cta{display:none}
      .mobile-panel{display:block}
    }
    @media (max-width: 640px){
      .container{width:min(var(--max), calc(100% - 24px))}
      .hero-main{padding:24px;border-radius:22px}
      .side-card,.card{padding:18px;border-radius:20px}
      h1{font-size:30px}
      .hero-actions .btn{width:100%}
      .stat-grid{grid-template-columns:1fr}
      .nav{padding:12px 0}
      table{min-width:760px}
    }