:root{--bg:#f7f8fc;--card:#ffffff;--ink:#162033;--muted:#5e6a81;--line:#e5eaf3;--brand:#5b6cff;--brand2:#ff6b6b;--brand3:#14b8a6;--shadow:0 18px 50px rgba(20,32,51,.08)}
    *{box-sizing:border-box} html{scroll-behavior:smooth} body{margin:0;font-family:Inter,Arial,"PingFang SC","Microsoft YaHei",sans-serif;background:radial-gradient(circle at top left,#fff4e8 0,#f7f8fc 30%,#f7f8fc 100%);color:var(--ink)}
    a{color:inherit;text-decoration:none} img{display:block;max-width:100%}
    .container{width:min(1180px,calc(100% - 32px));margin:0 auto}
    .topbar{position:sticky;top:0;z-index:40;background:rgba(247,248,252,.88);backdrop-filter:blur(14px);border-bottom:1px solid rgba(229,234,243,.75)}
    .nav{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:72px}
    .brand{display:flex;align-items:center;gap:12px;font-weight:800}
    .brand .ai-page-logo{width:42px;height:42px;border-radius:12px;object-fit:contain;background:#fff;padding:4px;border:1px solid var(--line)}
    .brand strong{font-size:18px}
    .navlinks{display:flex;align-items:center;gap:18px;flex-wrap:wrap;justify-content:flex-end}
    .navlinks a{font-size:14px;color:var(--muted);padding:8px 0;position:relative}
    .navlinks a::after{content:"";position:absolute;left:0;bottom:2px;width:0;height:2px;background:linear-gradient(90deg,var(--brand),var(--brand2));transition:.25s}
    .navlinks a:hover::after{width:100%}
    .menu-btn{display:none;border:1px solid var(--line);background:#fff;color:var(--ink);border-radius:12px;padding:10px 12px}
    header.hero{padding:34px 0 22px;position:relative;overflow:hidden}
    .hero-wrap{display:grid;grid-template-columns:1.15fr .85fr;gap:24px;align-items:stretch}
    .hero-copy,.hero-side,.section-card,.panel,.faq-item,.review,.article,.metric,.price-box,.timeline li,.tag-cloud span,.form-box,.compare-table,.floating-card{background:rgba(255,255,255,.92);border:1px solid rgba(229,234,243,.9);box-shadow:var(--shadow);border-radius:24px}
    .hero-copy{padding:34px}
    h1{font-size:clamp(34px,5vw,56px);line-height:1.05;margin:0 0 14px}
    .lead{font-size:17px;line-height:1.8;color:var(--muted);margin:0 0 22px}
    .chips{display:flex;flex-wrap:wrap;gap:10px;margin:0 0 22px}
    .chip{padding:9px 12px;border-radius:999px;background:linear-gradient(135deg,#eef2ff,#fff5ef);border:1px solid #edf0f8;color:#30405f;font-size:13px}
    .cta{display:flex;flex-wrap:wrap;gap:12px}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 18px;border-radius:14px;font-weight:700;border:1px solid transparent;transition:.25s;cursor:pointer}
    .btn-primary{background:linear-gradient(135deg,var(--brand),#8a5cff);color:#fff;box-shadow:0 14px 28px rgba(91,108,255,.25)}
    .btn-secondary{background:#fff;border-color:var(--line);color:var(--ink)}
    .btn:hover{transform:translateY(-2px)}
    .hero-side{padding:24px;display:grid;gap:14px}
    .hero-panel{padding:18px;border-radius:18px;background:linear-gradient(135deg,#fff,#f9fbff);border:1px solid var(--line)}
    .hero-panel h3,.section-title{margin:0 0 10px;font-size:22px}
    .hero-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
    .metric{padding:16px;border-radius:18px}
    .metric b{display:block;font-size:26px;margin-bottom:6px}
    .metric span{color:var(--muted);font-size:13px;line-height:1.5}
    main{padding-bottom:12px}
    section{padding:18px 0}
    .section-card{padding:28px}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:18px}
    .section-head p{margin:0;color:var(--muted);line-height:1.75}
    .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;border-radius:20px;border:1px solid var(--line);background:linear-gradient(180deg,#fff,#fbfcff);transition:.25s}
    .card:hover,.review:hover,.article:hover,.faq-item:hover{transform:translateY(-3px);box-shadow:0 20px 40px rgba(20,32,51,.08)}
    .card h3,.card h4{margin:0 0 10px}
    .card p{margin:0;color:var(--muted);line-height:1.75}
    .icon{width:42px;height:42px;border-radius:14px;display:grid;place-items:center;background:linear-gradient(135deg,#eef2ff,#fff0e9);margin-bottom:14px;color:#3d4be0;font-weight:800}
    .steps{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .step{padding:18px;border-radius:20px;border:1px dashed #d9e0ee;background:linear-gradient(180deg,#fff,#fafcff)}
    .step b{display:block;margin-bottom:8px;font-size:16px}
    .step p{margin:0;color:var(--muted);line-height:1.7}
    .compare-table{overflow:auto}
    table{width:100%;border-collapse:collapse;min-width:760px}
    th,td{padding:14px 16px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
    th{background:#f7f9ff;color:#23314d}
    .rating{display:inline-flex;align-items:center;gap:8px;padding:10px 14px;border-radius:999px;background:#fff3e8;border:1px solid #ffd8b4;color:#9a4a00;font-weight:700}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag-cloud span{padding:10px 12px;border-radius:999px;font-size:13px;color:#31415e}
    .reviews,.articles,.faq-list,.timeline,.price-grid{display:grid;gap:14px}
    .review,.article,.faq-item,.price-box,.floating-card,.form-box{padding:18px;border-radius:20px}
    .review .who{display:flex;justify-content:space-between;gap:10px;align-items:center;margin-bottom:10px}
    .stars{color:#f59e0b;letter-spacing:2px}
    .faq-item summary{cursor:pointer;list-style:none;font-weight:700}
    .faq-item summary::-webkit-details-marker{display:none}
    .faq-item p{color:var(--muted);line-height:1.8;margin:12px 0 0}
    .timeline li{list-style:none;padding:16px 18px;border-radius:18px;border:1px solid var(--line)}
    .timeline b{display:block;margin-bottom:6px}
    .split{display:grid;grid-template-columns:1fr 1fr;gap:16px;align-items:start}
    .article small,.muted{color:var(--muted)}
    .form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
    .form-grid .full{grid-column:1/-1}
    input,select,textarea{width:100%;border:1px solid #d8e0ed;border-radius:14px;padding:13px 14px;font:inherit;background:#fff;color:var(--ink)}
    textarea{min-height:120px;resize:vertical}
    label{display:block;font-size:14px;font-weight:700;margin:0 0 8px}
    .footer{margin-top:10px;background:#0f172a;color:#d8e2f5;padding:28px 0 18px}
    .footer a{color:#fff}
    .footer .container{display:grid;gap:18px}
    .footer-grid{display:grid;grid-template-columns:1.1fr .9fr .9fr;gap:18px;align-items:start}
    .footer-note{border-top:1px solid rgba(255,255,255,.12);padding-top:14px;font-size:13px;color:#a7b2c9}
    .float-wrap{position:fixed;right:16px;bottom:16px;z-index:50;display:grid;gap:10px}
    .float-btn{width:52px;height:52px;border-radius:16px;display:grid;place-items:center;background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;box-shadow:0 14px 24px rgba(91,108,255,.28);font-weight:800}
    .floating-card{position:fixed;right:16px;bottom:82px;width:min(320px,calc(100vw - 32px));display:none}
    .floating-card.open{display:block}
    .qr{display:flex;gap:14px;align-items:center}
    .qr img{width:96px;height:96px;object-fit:cover;border-radius:16px;border:1px solid var(--line)}
    .hide-mobile{display:block}
    .scroll-table{overflow:auto}
    .reveal{opacity:0;transform:translateY(18px);transition:.6s ease}
    .reveal.in{opacity:1;transform:none}
    @media (max-width: 960px){
      .hero-wrap,.grid-3,.grid-4,.steps,.split,.footer-grid{grid-template-columns:1fr}
      .navlinks{display:none;position:absolute;top:72px;left:16px;right:16px;background:#fff;border:1px solid var(--line);border-radius:18px;padding:14px;box-shadow:var(--shadow)}
      .navlinks.open{display:grid}
      .menu-btn{display:inline-flex}
      .hero-copy{padding:24px}
      .section-card{padding:22px}
      .hide-mobile{display:none}
      .form-grid{grid-template-columns:1fr}
      .hero-stats{grid-template-columns:1fr}
    }