:root{
      --bg:#f6f7fb;
      --surface:#ffffff;
      --surface-2:#f3f7ff;
      --text:#172033;
      --muted:#5b657a;
      --line:#e5e9f2;
      --primary:#4f6bff;
      --primary-2:#6d4bff;
      --accent:#ff8a5c;
      --accent-2:#3ec7b6;
      --shadow:0 12px 30px rgba(18,35,79,.08);
      --shadow-2:0 18px 40px rgba(18,35,79,.12);
      --radius:20px;
      --radius-sm:14px;
      --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",Arial,sans-serif;background:
      radial-gradient(circle at top left, rgba(79,107,255,.12), transparent 26%),
      radial-gradient(circle at top right, rgba(255,138,92,.12), transparent 24%),
      linear-gradient(180deg, #fff 0%, #f7f9ff 35%, #f6f7fb 100%);
      color:var(--text);line-height:1.7}
    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:30;background:rgba(255,255,255,.82);backdrop-filter:blur(12px);border-bottom:1px solid rgba(229,233,242,.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:42px;height:42px;object-fit:contain;border-radius:10px;background:#fff;border:1px solid var(--line);padding:6px;box-shadow:0 6px 14px rgba(0,0,0,.04)}
    .brand-text{min-width:0}
    .brand-text strong{display:block;font-size:18px;line-height:1.2}
    .brand-text span{display:block;color:var(--muted);font-size:12px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
    .nav-links{display:flex;align-items:center;gap:18px;flex-wrap:wrap;justify-content:flex-end}
    .nav-links a{font-size:14px;color:var(--text);padding:8px 0;position:relative}
    .nav-links a::after{content:"";position:absolute;left:0;bottom:0;width:0;height:2px;background:linear-gradient(90deg,var(--primary),var(--accent));transition:.25s}
    .nav-links a:hover::after{width:100%}
    .nav-cta{display:flex;align-items:center;gap:10px}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:none;border-radius:999px;padding:12px 18px;font-weight:700;font-size:14px;cursor:pointer;transition:.25s ease;box-shadow:none}
    .btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary-2));color:#fff;box-shadow:0 12px 24px rgba(79,107,255,.24)}
    .btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 28px rgba(79,107,255,.28)}
    .btn-soft{background:#eef3ff;color:#2740b8}
    .btn-soft:hover{transform:translateY(-2px)}
    .menu-toggle{display:none;background:#fff;border:1px solid var(--line);border-radius:12px;padding:10px 12px;cursor:pointer}
    .hero{padding:56px 0 24px}
    .hero-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:24px;align-items:stretch}
    .hero-main,.hero-side,.card,.panel{background:var(--surface);border:1px solid rgba(229,233,242,.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%;pointer-events:none}
    .hero-main::before{width:180px;height:180px;right:-40px;top:-40px;background:radial-gradient(circle, rgba(109,75,255,.18), transparent 70%)}
    .hero-main::after{width:260px;height:260px;right:80px;bottom:-130px;background:radial-gradient(circle, rgba(255,138,92,.14), transparent 70%)}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:7px 12px;border-radius:999px;background:linear-gradient(90deg, rgba(79,107,255,.12), rgba(255,138,92,.12));color:#2640a6;font-weight:700;font-size:13px}
    h1{margin:16px 0 12px;font-size:clamp(32px,5vw,54px);line-height:1.08;letter-spacing:-.03em}
    .lead{font-size:17px;color:var(--muted);max-width:720px;margin:0}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
    .hero-badges{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
    .tag{display:inline-flex;align-items:center;gap:8px;padding:10px 12px;border-radius:999px;background:#f4f7ff;color:#30456d;border:1px solid #e4ebff;font-size:13px}
    .hero-side{padding:22px;background:
      linear-gradient(180deg, rgba(255,255,255,.96), rgba(248,250,255,.96)),
      linear-gradient(135deg, rgba(79,107,255,.08), rgba(255,138,92,.08))}
    .mini-stats{display:grid;grid-template-columns:1fr 1fr;gap:12px}
    .stat{padding:16px;border-radius:16px;background:linear-gradient(180deg,#fff,#fbfcff);border:1px solid var(--line)}
    .stat strong{display:block;font-size:24px;line-height:1;color:#1b2a4c}
    .stat span{display:block;margin-top:6px;color:var(--muted);font-size:13px}
    .side-note{margin-top:14px;padding:16px;border-radius:16px;background:#f8fbff;border:1px dashed #d7e2ff;color:var(--muted);font-size:14px}
    section{padding:18px 0}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:18px;margin-bottom:16px}
    .section-head h2{margin:0;font-size:28px;line-height:1.2}
    .section-head p{margin:0;color:var(--muted);max-width:720px}
    .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:22px;transition:.25s ease}
    .card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2)}
    .icon{width:46px;height:46px;border-radius:14px;display:grid;place-items:center;background:linear-gradient(135deg, rgba(79,107,255,.12), rgba(255,138,92,.14));color:#2740b8;font-weight:800;margin-bottom:14px}
    .card h3{margin:0 0 8px;font-size:18px}
    .card p,.card li,.muted{color:var(--muted)}
    .card ul{margin:0;padding-left:18px}
    .media-strip{display:grid;grid-template-columns:1fr 1fr;gap:16px}
    .media-card{padding:18px}
    .media-card .ai-page-image{width:100%;border-radius:16px;border:1px solid var(--line);background:#fff}
    .steps{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .step{padding:20px;border-radius:18px;background:linear-gradient(180deg,#fff,#fbfcff);border:1px solid var(--line);position:relative}
    .step .num{font-size:13px;font-weight:800;color:#2740b8}
    .step h3{margin:10px 0 8px;font-size:17px}
    .compare-wrap{overflow:auto;border-radius:18px;border:1px solid var(--line);background:#fff;box-shadow:var(--shadow)}
    table{width:100%;border-collapse:collapse;min-width:820px}
    th,td{padding:14px 16px;border-bottom:1px solid #edf1f7;text-align:left;vertical-align:top}
    th{background:#f7f9ff;color:#22335c;font-size:14px}
    td{font-size:14px;color:var(--text)}
    .score-badge{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;background:#fff5ef;color:#b84f1e;font-weight:700}
    .rating{display:grid;grid-template-columns:1fr .9fr;gap:16px}
    .rating-box{padding:24px;border-radius:20px;background:linear-gradient(135deg, #ffffff, #f8faff);border:1px solid var(--line)}
    .stars{color:#ff9a2f;font-size:22px;letter-spacing:2px}
    .accordion{display:grid;gap:12px}
    details{background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow);overflow:hidden}
    summary{list-style:none;cursor:pointer;padding:18px 20px;font-weight:700;display:flex;align-items:center;justify-content:space-between;gap:16px}
    summary::-webkit-details-marker{display:none}
    summary::after{content:"+";font-size:20px;color:#2941a8}
    details[open] summary::after{content:"–"}
    details .content{padding:0 20px 18px;color:var(--muted)}
    .reviews{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .review{padding:22px;border-radius:18px;background:linear-gradient(180deg,#fff,#fbfcff);border:1px solid var(--line)}
    .review .who{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:10px}
    .review strong{font-size:16px}
    .review em{font-style:normal;color:#ff9a2f}
    .timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .timeline .item{padding:20px;border-radius:18px;background:#fff;border:1px solid var(--line)}
    .timeline .item span{display:inline-block;font-weight:800;color:#2740b8;margin-bottom:10px}
    .articles{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .article{padding:20px;border-radius:18px;background:#fff;border:1px solid var(--line)}
    .article a{color:#1f3ab8;font-weight:700}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag-cloud a{padding:10px 13px;border-radius:999px;background:#fff;border:1px solid var(--line);box-shadow:0 8px 18px rgba(0,0,0,.03);font-size:13px;color:#33415d}
    .form-layout{display:grid;grid-template-columns:.92fr 1.08fr;gap:16px;align-items:start}
    form{display:grid;gap:12px}
    .field{display:grid;gap:8px}
    label{font-size:14px;font-weight:700;color:#28344f}
    input,select,textarea{width:100%;padding:13px 14px;border-radius:14px;border:1px solid #dce3f1;background:#fff;color:var(--text);font:inherit;outline:none;transition:.2s}
    input:focus,select:focus,textarea:focus{border-color:#8aa0ff;box-shadow:0 0 0 4px rgba(79,107,255,.09)}
    textarea{min-height:120px;resize:vertical}
    .footer{margin-top:18px;background:#0e1630;color:#dfe7ff;padding:28px 0 22px}
    .footer a{color:#ffffff}
    .footer .muted{color:#b7c4e2}
    .footer-grid{display:grid;grid-template-columns:1.1fr .9fr .9fr;gap:18px}
    .footer .panel{background:rgba(255,255,255,.04);border-color:rgba(255,255,255,.08);box-shadow:none}
    .footer .tag-cloud a{background:rgba(255,255,255,.05);border-color:rgba(255,255,255,.08);color:#e9efff}
    .floating{position:fixed;right:16px;bottom:16px;z-index:40;display:grid;gap:10px}
    .float-btn{padding:12px 14px;border-radius:999px;background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;font-weight:700;box-shadow:0 14px 28px rgba(79,107,255,.3)}
    .float-btn.secondary{background:#fff;color:#243252;border:1px solid var(--line)}
    .qrcode{width:120px;border-radius:16px;border:1px solid rgba(255,255,255,.08);background:#fff;padding:8px}
    .ai-page-home-link{font-weight:700}
    .scroll-top{position:fixed;left:16px;bottom:16px;z-index:40;opacity:0;pointer-events:none;transition:.25s}
    .scroll-top.show{opacity:1;pointer-events:auto}
    .scroll-top button{border:none;border-radius:999px;padding:12px 14px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);cursor:pointer;color:var(--text)}
    .reveal{opacity:0;transform:translateY(14px);transition:.55s ease}
    .reveal.visible{opacity:1;transform:none}
    .service-net{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .service-net .card{min-height:100%}
    .pricing{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .price{padding:22px;border-radius:20px;background:#fff;border:1px solid var(--line)}
    .price strong{font-size:30px}
    .price .small{color:var(--muted);font-size:13px}
    @media (max-width: 1024px){
      .hero-grid,.rating,.form-layout,.footer-grid,.media-strip{grid-template-columns:1fr}
      .grid-4,.steps,.timeline,.service-net,.pricing,.reviews,.articles,.grid-3{grid-template-columns:repeat(2,1fr)}
      .nav-links{gap:12px}
    }
    @media (max-width: 760px){
      .container{width:min(var(--container), calc(100% - 24px))}
      .menu-toggle{display:inline-flex}
      .nav{flex-wrap:wrap}
      .nav-links{display:none;width:100%;padding:10px 0 4px;justify-content:flex-start;gap:12px}
      .nav-links.open{display:flex}
      .nav-cta{margin-left:auto}
      .hero{padding-top:28px}
      .hero-main{padding:24px}
      .grid-4,.steps,.timeline,.service-net,.pricing,.reviews,.articles,.grid-3{grid-template-columns:1fr}
      .section-head{flex-direction:column;align-items:flex-start}
      h1{font-size:clamp(30px,9vw,40px)}
      .lead{font-size:16px}
      .mini-stats{grid-template-columns:1fr 1fr}
      .floating{right:12px;bottom:12px}
    }