:root{
      --bg:#f6f8fc;
      --panel:#ffffff;
      --panel-2:#f9fbff;
      --text:#182230;
      --muted:#5b6778;
      --line:#dbe3ef;
      --brand:#ff4d6d;
      --brand2:#2a66ff;
      --brand3:#14b8a6;
      --gold:#ffb400;
      --shadow:0 18px 40px rgba(20,35,60,.09);
      --shadow2:0 10px 24px rgba(42,102,255,.12);
      --radius:20px;
      --radius2:26px;
      --container:1200px;
    }
    *{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 10% 10%, rgba(255,77,109,.14), transparent 22%),
      radial-gradient(circle at 90% 15%, rgba(42,102,255,.12), transparent 20%),
      radial-gradient(circle at 70% 80%, rgba(20,184,166,.10), transparent 18%),
      linear-gradient(180deg,#fff 0%, #f7f9fd 28%, #f6f8fc 100%);
      color:var(--text);line-height:1.65}
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(var(--container),calc(100% - 32px));margin:0 auto}
    header,main,footer{position:relative;z-index:1}
    .topbar{position:sticky;top:0;background:rgba(255,255,255,.82);backdrop-filter:blur(16px);border-bottom:1px solid rgba(219,227,239,.75);z-index:20}
    .nav{display:flex;align-items:center;justify-content:space-between;gap:18px;min-height:74px}
    .brand{display:flex;align-items:center;gap:12px;min-width:0}
    .ai-page-logo{width:46px;height:46px;object-fit:contain;border-radius:12px;background:#fff;box-shadow:0 8px 20px rgba(0,0,0,.08);padding:4px}
    .brand h2{margin:0;font-size:18px;line-height:1.1}
    .brand p{margin:2px 0 0;color:var(--muted);font-size:12px}
    .navlinks{display:flex;align-items:center;gap:16px;flex-wrap:wrap;justify-content:flex-end}
    .navlinks a{font-size:14px;color:#22314a;padding:8px 10px;border-radius:999px;transition:.2s ease}
    .navlinks a:hover{background:#eef4ff;color:var(--brand2)}
    .nav-actions{display:flex;align-items:center;gap:10px}
    .btn,.btn-outline,.btn-soft{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:999px;padding:12px 16px;font-weight:700;font-size:14px;border:1px solid transparent;transition:.2s ease;cursor:pointer;white-space:nowrap}
    .btn{background:linear-gradient(135deg,var(--brand) 0%, var(--brand2) 100%);color:#fff;box-shadow:var(--shadow2)}
    .btn:hover,.btn-outline:hover,.btn-soft:hover{transform:translateY(-2px)}
    .btn-outline{background:#fff;border-color:var(--line);color:var(--text)}
    .btn-soft{background:#eef4ff;color:var(--brand2)}
    .menu-toggle{display:none;border:1px solid var(--line);background:#fff;border-radius:12px;padding:10px 12px}
    .hero{padding:42px 0 22px}
    .hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:24px;align-items:stretch}
    .hero-panel{background:linear-gradient(135deg,#fff 0%, #fff7f9 42%, #f4f8ff 100%);border:1px solid rgba(219,227,239,.8);border-radius:var(--radius2);padding:30px;box-shadow:var(--shadow);overflow:hidden;position:relative}
    .hero-panel:before,.hero-panel:after{content:"";position:absolute;border-radius:50%;pointer-events:none}
    .hero-panel:before{width:180px;height:180px;background:radial-gradient(circle, rgba(255,77,109,.18), transparent 70%);right:-40px;top:-40px}
    .hero-panel:after{width:220px;height:220px;background:radial-gradient(circle, rgba(42,102,255,.14), transparent 68%);left:-70px;bottom:-80px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:7px 12px;border-radius:999px;background:#fff;border:1px solid rgba(42,102,255,.14);color:var(--brand2);font-weight:700;font-size:13px}
    h1{margin:16px 0 14px;font-size:clamp(32px,5vw,54px);line-height:1.08;letter-spacing:-.02em}
    .hero p{margin:0;color:var(--muted);font-size:16px;max-width:58ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}
    .hero-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:24px}
    .stat{background:rgba(255,255,255,.84);border:1px solid var(--line);border-radius:18px;padding:16px;transition:.2s ease}
    .stat:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
    .stat strong{display:block;font-size:24px;color:#122033}
    .stat span{display:block;color:var(--muted);font-size:13px;margin-top:4px}
    .hero-side{display:grid;gap:14px}
    .side-card{background:var(--panel);border:1px solid var(--line);border-radius:22px;padding:20px;box-shadow:var(--shadow)}
    .side-card h3{margin:0 0 10px;font-size:18px}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag-cloud span{padding:8px 11px;border-radius:999px;background:#f2f6ff;border:1px solid #dce6ff;color:#29406e;font-size:13px}
    .section{padding:18px 0 6px}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:16px;margin-bottom:16px}
    .section-head h2{margin:0;font-size:28px;line-height:1.15}
    .section-head p{margin:0;color:var(--muted);max-width:68ch}
    .grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
    .card{background:var(--panel);border:1px solid var(--line);border-radius:20px;padding:20px;box-shadow:0 10px 24px rgba(14,28,46,.05);transition:.22s ease}
    .card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
    .card h3{margin:0 0 8px;font-size:18px}
    .card p{margin:0;color:var(--muted)}
    .icon{width:44px;height:44px;border-radius:14px;display:grid;place-items:center;margin-bottom:12px;background:linear-gradient(135deg,rgba(255,77,109,.12),rgba(42,102,255,.12));color:var(--brand2);font-weight:900}
    .split{display:grid;grid-template-columns:1fr 1fr;gap:16px}
    .panel{background:linear-gradient(180deg,#fff, #fbfcff);border:1px solid var(--line);border-radius:22px;padding:22px;box-shadow:var(--shadow)}
    .list{margin:14px 0 0;padding:0;list-style:none;display:grid;gap:10px}
    .list li{display:flex;gap:10px;align-items:flex-start;color:var(--text)}
    .dot{width:10px;height:10px;border-radius:50%;background:linear-gradient(135deg,var(--brand),var(--brand2));margin-top:8px;flex:none}
    .media-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
    .media-strip img{width:100%;border-radius:18px;border:1px solid var(--line);box-shadow:var(--shadow);object-fit:cover}
    .mini-note{display:flex;gap:12px;align-items:flex-start;padding:14px 16px;border-radius:18px;background:#f5f8ff;border:1px solid #dfe8fb}
    .mini-note strong{display:block;margin-bottom:3px}
    .process{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .step{position:relative}
    .step .num{font-size:13px;font-weight:800;color:var(--brand2);margin-bottom:10px}
    .step:after{content:"";position:absolute;right:-7px;top:28px;width:14px;height:2px;background:linear-gradient(90deg,var(--brand2),transparent)}
    .step:last-child:after{display:none}
    table{width:100%;border-collapse:collapse;background:#fff;border-radius:18px;overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow)}
    th,td{padding:14px 12px;text-align:left;border-bottom:1px solid #edf1f8;vertical-align:top}
    th{background:#f6f9ff;font-size:14px}
    td{font-size:14px;color:#243247}
    .rating{display:flex;flex-wrap:wrap;align-items:center;gap:12px}
    .stars{color:var(--gold);letter-spacing:2px;font-size:20px}
    .score{font-size:34px;font-weight:900;color:var(--brand2)}
    .compare-wrap{overflow:auto}
    .accordion{display:grid;gap:12px}
    details{background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:0 8px 20px rgba(17,28,44,.04);overflow:hidden}
    summary{list-style:none;cursor:pointer;padding:16px 18px;font-weight:800;display:flex;justify-content:space-between;align-items:center;gap:16px}
    summary::-webkit-details-marker{display:none}
    details p{margin:0;padding:0 18px 16px;color:var(--muted)}
    .comment{display:grid;gap:10px}
    .comment .meta{display:flex;justify-content:space-between;gap:10px;align-items:center}
    .avatar{width:42px;height:42px;border-radius:50%;display:grid;place-items:center;background:linear-gradient(135deg,rgba(255,77,109,.14),rgba(42,102,255,.14));color:#233a66;font-weight:900}
    .article-list{display:grid;gap:12px}
    .article{display:flex;justify-content:space-between;gap:14px;align-items:center;padding:16px 18px;border:1px solid var(--line);border-radius:18px;background:#fff}
    .article span{color:var(--muted);font-size:13px}
    .form-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
    .field{display:grid;gap:8px}
    input,select,textarea{width:100%;padding:13px 14px;border-radius:14px;border:1px solid #d8e0ec;background:#fff;color:var(--text);font:inherit;outline:none;transition:.2s ease}
    input:focus,select:focus,textarea:focus{border-color:rgba(42,102,255,.55);box-shadow:0 0 0 4px rgba(42,102,255,.10)}
    textarea{min-height:118px;resize:vertical}
    .full{grid-column:1/-1}
    .footer{margin-top:16px;padding:24px 0 20px;border-top:1px solid var(--line);background:linear-gradient(180deg,rgba(255,255,255,.78),rgba(246,248,252,.98))}
    .footer a{color:#21314b}
    .footer-grid{display:grid;grid-template-columns:1.1fr .9fr .8fr;gap:18px}
    .footer small,.footer p,.footer li{color:#536173}
    .footer ul{list-style:none;padding:0;margin:10px 0 0;display:grid;gap:8px}
    .floating{position:fixed;right:16px;bottom:16px;display:grid;gap:10px;z-index:30}
    .float-btn{width:50px;height:50px;border-radius:16px;display:grid;place-items:center;background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;box-shadow:var(--shadow2);font-weight:900;border:none;cursor:pointer}
    .service-rail{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}
    .service-rail .card{padding:18px}
    .price-box{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
    .price{border-radius:18px;padding:18px;background:linear-gradient(180deg,#fff,#f7fbff);border:1px solid var(--line)}
    .price strong{display:block;font-size:26px;color:var(--brand2)}
    .soft-badge{display:inline-flex;padding:7px 10px;border-radius:999px;background:#fff0f3;color:#cf2348;font-weight:700;font-size:12px;border:1px solid #ffd0da}
    .mobile-only{display:none}
    .fade{opacity:0;transform:translateY(18px);transition:.6s ease}
    .fade.show{opacity:1;transform:translateY(0)}
    @media (max-width: 1100px){
      .hero-grid,.split,.grid-4,.grid-3,.process,.footer-grid,.service-rail,.price-box{grid-template-columns:1fr 1fr}
      .hero-side{grid-column:1/-1}
    }
    @media (max-width: 760px){
      .navlinks,.nav-actions{display:none}
      .menu-toggle{display:inline-flex}
      .mobile-only{display:inline-flex}
      .hero,.section{padding-top:14px}
      .hero-grid,.split,.grid-4,.grid-3,.process,.footer-grid,.service-rail,.price-box,.form-grid,.hero-stats{grid-template-columns:1fr}
      .hero-panel{padding:22px}
      h1{font-size:30px}
      .section-head{flex-direction:column;align-items:flex-start}
      .media-strip{grid-template-columns:1fr}
      .step:after{display:none}
      .article{flex-direction:column;align-items:flex-start}
      .topbar.open .navlinks,.topbar.open .nav-actions{display:flex;flex-direction:column;align-items:flex-start;width:100%}
      .topbar.open .nav{flex-wrap:wrap;padding-bottom:12px}
      .topbar.open .navlinks{padding:6px 0 0}
      .topbar.open .nav-actions{padding:6px 0 10px}
    }