:root{
      --bg:#f6f8fc;
      --panel:#ffffff;
      --panel2:#fff6f4;
      --text:#172033;
      --muted:#5f6b85;
      --line:#e6eaf2;
      --brand:#ff4d6d;
      --brand2:#6c63ff;
      --accent:#00b8a9;
      --warm:#ffb703;
      --shadow:0 18px 50px rgba(23,32,51,.10);
      --shadow2:0 12px 28px rgba(255,77,109,.14);
      --radius:20px;
      --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;background:
      radial-gradient(circle at top left, rgba(255,77,109,.10), transparent 26%),
      radial-gradient(circle at 90% 10%, rgba(108,99,255,.10), transparent 22%),
      linear-gradient(180deg,#fbfcff 0%,#f6f8fc 42%,#f6f8fc 100%);
      color:var(--text); line-height:1.65;}
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%;height:auto}
    .container{max-width:var(--container);margin:0 auto;padding:0 18px}
    .topbar{position:sticky;top:0;z-index:80;background:rgba(255,255,255,.82);backdrop-filter:blur(14px);border-bottom:1px solid rgba(230,234,242,.8)}
    .nav{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:72px}
    .brand{display:flex;align-items:center;gap:12px;min-width:0}
    .brand .ai-page-logo{width:42px;flex:0 0 auto;border-radius:12px;box-shadow:0 8px 20px rgba(23,32,51,.08)}
    .brand strong{display:block;font-size:18px;line-height:1.1}
    .brand span{display:block;font-size:12px;color:var(--muted)}
    .nav-links{display:flex;align-items:center;gap:18px;flex-wrap:wrap;justify-content:flex-end}
    .nav-links a{font-size:14px;color:#30405f;padding:8px 0;position:relative}
    .nav-links a:after{content:"";position:absolute;left:0;bottom:2px;width:0;height:2px;background:linear-gradient(90deg,var(--brand),var(--brand2));transition:.25s}
    .nav-links a:hover:after{width:100%}
    .nav-cta{display:flex;gap:10px;align-items:center}
    .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;cursor:pointer;transition:.25s transform,.25s box-shadow,.25s background,.25s border-color;white-space:nowrap}
    .btn:hover{transform:translateY(-2px);box-shadow:var(--shadow2)}
    .btn-primary{background:linear-gradient(135deg,var(--brand),#ff7a59);color:#fff}
    .btn-secondary{background:#fff;border-color:var(--line);color:var(--text)}
    .hamburger{display:none;border:1px solid var(--line);background:#fff;border-radius:14px;width:44px;height:44px;align-items:center;justify-content:center}
    .hero{padding:46px 0 28px}
    .hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:22px;align-items:stretch}
    .hero-main,.hero-side,.section-card,.panel{background:linear-gradient(180deg,rgba(255,255,255,.98),rgba(255,255,255,.94));border:1px solid rgba(230,234,242,.95);border-radius:var(--radius);box-shadow:var(--shadow)}
    .hero-main{padding:30px;position:relative;overflow:hidden}
    .hero-main:before,.hero-main:after{content:"";position:absolute;border-radius:999px;filter:blur(2px);pointer-events:none}
    .hero-main:before{width:240px;height:240px;background:radial-gradient(circle, rgba(255,77,109,.15), transparent 62%);right:-70px;top:-60px}
    .hero-main:after{width:180px;height:180px;background:radial-gradient(circle, rgba(108,99,255,.16), transparent 62%);left:-50px;bottom:-80px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;background:rgba(255,77,109,.10);color:#c4314e;border:1px solid rgba(255,77,109,.14);padding:7px 12px;border-radius:999px;font-size:13px;font-weight:700}
    h1{margin:16px 0 12px;font-size:clamp(30px,5vw,52px);line-height:1.06;letter-spacing:-.02em}
    .lead{font-size:17px;color:var(--muted);max-width:700px;margin:0 0 18px}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:18px}
    .hero-points{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:24px}
    .point{background:rgba(246,248,252,.8);border:1px solid var(--line);border-radius:18px;padding:14px}
    .point b{display:block;font-size:15px;margin-bottom:4px}
    .point span{font-size:13px;color:var(--muted)}
    .hero-side{padding:22px;background:linear-gradient(180deg,#101a33 0%,#182547 100%);color:#fff;position:relative;overflow:hidden}
    .hero-side h2,.hero-side p,.hero-side li{color:#fff}
    .hero-side .muted{color:rgba(255,255,255,.75)}
    .hero-side ul{padding-left:18px;margin:12px 0 0}
    .hero-side li{margin:8px 0}
    .hero-metric{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:18px}
    .metric{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.12);border-radius:18px;padding:14px}
    .metric strong{display:block;font-size:24px}
    .metric span{font-size:13px;color:rgba(255,255,255,.78)}
    .section{padding:18px 0}
    .section-head{display:flex;justify-content:space-between;gap:16px;align-items:end;margin-bottom:14px}
    .section-head h2{margin:0;font-size:28px;line-height:1.15}
    .section-head p{margin:0;color:var(--muted);max-width:720px}
    .grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
    .card{background:var(--panel);border:1px solid var(--line);border-radius:18px;padding:18px;box-shadow:0 10px 26px rgba(23,32,51,.05);transition:.25s transform,.25s box-shadow}
    .card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
    .card h3{margin:0 0 8px;font-size:18px}
    .card p,.card li{color:var(--muted)}
    .badge{display:inline-flex;align-items:center;gap:6px;background:rgba(108,99,255,.10);color:#4f46e5;border:1px solid rgba(108,99,255,.14);padding:6px 10px;border-radius:999px;font-size:12px;font-weight:700}
    .stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
    .stat{padding:18px;border-radius:20px;background:linear-gradient(180deg,#fff, #fff8fb);border:1px solid var(--line)}
    .stat strong{display:block;font-size:28px;margin-bottom:6px}
    .stat span{color:var(--muted);font-size:13px}
    .table-wrap{overflow-x:auto;border-radius:18px;border:1px solid var(--line);background:#fff}
    table{width:100%;border-collapse:collapse;min-width:860px}
    th,td{padding:14px 16px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
    th{background:#fbfcff;color:#27344f}
    tr:last-child td{border-bottom:none}
    .score{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
    .stars{color:var(--warm);letter-spacing:1px}
    .faq details{background:#fff;border:1px solid var(--line);border-radius:16px;padding:16px 18px;box-shadow:0 8px 18px rgba(23,32,51,.04)}
    .faq details+details{margin-top:12px}
    .faq summary{cursor:pointer;font-weight:700;list-style:none}
    .faq summary::-webkit-details-marker{display:none}
    .faq p{margin:10px 0 0;color:var(--muted)}
    .review{display:flex;flex-direction:column;gap:10px}
    .review .meta{display:flex;justify-content:space-between;gap:12px;align-items:center}
    .review .role{font-size:13px;color:var(--muted)}
    .review .rating{color:var(--warm);font-weight:700}
    .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:#3c4b69;font-size:13px}
    .timeline{display:grid;gap:14px}
    .step{display:grid;grid-template-columns:72px 1fr;gap:14px;align-items:start;background:#fff;border:1px solid var(--line);border-radius:18px;padding:16px}
    .step .num{width:72px;height:72px;border-radius:18px;background:linear-gradient(135deg,rgba(255,77,109,.14),rgba(108,99,255,.16));display:flex;align-items:center;justify-content:center;font-size:26px;font-weight:800;color:#1f2a44}
    .form{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%;border:1px solid var(--line);border-radius:14px;background:#fff;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(108,99,255,.55);box-shadow:0 0 0 4px rgba(108,99,255,.10)}
    textarea{min-height:130px;resize:vertical}
    .footer{margin-top:18px;padding:24px 0 28px;background:#101827;color:#fff}
    .footer a{color:#fff}
    .footer .muted{color:rgba(255,255,255,.72)}
    .footer-grid{display:grid;grid-template-columns:1.1fr .9fr .9fr;gap:18px}
    .footer-card{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1);border-radius:18px;padding:18px}
    .footer-links{display:flex;flex-wrap:wrap;gap:10px}
    .footer-links a{padding:8px 10px;border-radius:999px;background:rgba(255,255,255,.08)}
    .floating{position:fixed;right:16px;bottom:16px;z-index:90;display:flex;flex-direction:column;gap:10px}
    .float-btn{width:50px;height:50px;border-radius:16px;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--brand),#ff7a59);color:#fff;box-shadow:var(--shadow2)}
    .backtop{background:linear-gradient(135deg,var(--brand2),#4b7bec)}
    .mobile-menu{display:none}
    .gallery{display:grid;grid-template-columns:1fr 1fr;gap:14px}
    .gallery .imgbox{border-radius:18px;overflow:hidden;border:1px solid var(--line);background:#fff}
    .gallery .imgbox img{width:100%;height:auto}
    .list-clean{margin:0;padding-left:18px}
    .list-clean li{margin:8px 0}
    .note{font-size:13px;color:var(--muted)}
    .reveal{opacity:0;transform:translateY(16px);transition:.7s ease}
    .reveal.show{opacity:1;transform:translateY(0)}
    @media (max-width: 980px){
      .hero-grid,.grid-3,.grid-2,.stats,.footer-grid,.gallery{grid-template-columns:1fr}
      .section-head{flex-direction:column;align-items:start}
      .nav-links,.nav-cta{display:none}
      .hamburger{display:inline-flex}
      .mobile-menu{display:none;padding:0 0 16px}
      .mobile-menu.open{display:block}
      .mobile-menu .nav-links{display:flex;flex-direction:column;align-items:flex-start;gap:8px;padding:14px 0}
      .mobile-menu .nav-cta{display:flex;flex-wrap:wrap}
      .form{grid-template-columns:1fr}
    }