:root{
      --bg:#f7f4ef;
      --bg2:#fffaf3;
      --card:#ffffff;
      --line:#e8dfd2;
      --text:#243041;
      --muted:#667085;
      --brand:#1f6feb;
      --brand2:#ff8f3d;
      --brand3:#5b7cfa;
      --shadow:0 18px 40px rgba(31, 41, 55, .08);
      --shadow2:0 10px 24px rgba(31, 41, 55, .06);
      --radius:20px;
      --container:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family: -apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",Segoe UI,Roboto,Helvetica,Arial,sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at 10% 10%, rgba(255,143,61,.12), transparent 22%),
        radial-gradient(circle at 90% 20%, rgba(31,111,235,.10), transparent 20%),
        radial-gradient(circle at 80% 90%, rgba(91,124,250,.10), transparent 18%),
        linear-gradient(180deg, #fffdf9 0%, var(--bg) 100%);
      min-width:320px;
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(100% - 32px, var(--container));margin:0 auto}
    .site-header{
      position:sticky;top:0;z-index:50;
      backdrop-filter: blur(14px);
      background:rgba(255,252,247,.78);
      border-bottom:1px solid rgba(232,223,210,.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:12px;background:#fff;border:1px solid var(--line);padding:4px;box-shadow:var(--shadow2)}
    .brand-text{min-width:0}
    .brand-text strong{display:block;font-size:16px;letter-spacing:.4px}
    .brand-text span{display:block;color:var(--muted);font-size:12px;margin-top:3px}
    .nav-actions{display:flex;align-items:center;gap:10px;flex-wrap:wrap;justify-content:flex-end}
    .nav-links{display:flex;align-items:center;gap:14px;flex-wrap:wrap}
    .nav-links a{font-size:14px;color:#304255;padding:8px 10px;border-radius:10px}
    .nav-links a:hover{background:#f3efe8;color:#122033}
    .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;transition:.25s ease;cursor:pointer;white-space:nowrap;
    }
    .btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand3));color:#fff;box-shadow:0 12px 24px rgba(31,111,235,.22)}
    .btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 30px rgba(31,111,235,.25)}
    .btn-light{background:#fff;border-color:var(--line);color:var(--text)}
    .btn-light:hover{transform:translateY(-2px);box-shadow:var(--shadow2)}
    .menu-btn{display:none;background:#fff;border:1px solid var(--line);border-radius:12px;padding:10px 12px}
    main{display:block}
    .hero{padding:28px 0 18px}
    .hero-grid{
      display:grid;grid-template-columns:1.18fr .82fr;gap:22px;align-items:stretch;
    }
    .hero-panel{
      background:
        linear-gradient(135deg, rgba(31,111,235,.08), rgba(255,143,61,.06)),
        linear-gradient(180deg,#fff, #fffdf8);
      border:1px solid rgba(232,223,210,.9);
      border-radius:28px;
      box-shadow:var(--shadow);
      overflow:hidden;
      position:relative;
    }
    .hero-main{padding:34px}
    .kicker{display:inline-flex;align-items:center;gap:8px;background:#fff;border:1px solid var(--line);padding:8px 14px;border-radius:999px;font-size:13px;color:#3a4b60;box-shadow:var(--shadow2)}
    h1{margin:18px 0 12px;font-size:clamp(30px,5vw,52px);line-height:1.1;letter-spacing:-.03em}
    .lead{margin:0;color:#4d5f74;font-size:16px;line-height:1.85;max-width:62ch}
    .hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px}
    .hero-points{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:24px}
    .mini-stat{
      background:rgba(255,255,255,.8);border:1px solid var(--line);border-radius:18px;padding:16px;min-height:94px
    }
    .mini-stat strong{display:block;font-size:22px;margin-bottom:6px}
    .mini-stat span{color:var(--muted);font-size:13px;line-height:1.5}
    .hero-side{padding:22px;display:flex;flex-direction:column;gap:14px}
    .side-box{
      background:#fff;border:1px solid var(--line);border-radius:20px;padding:18px;box-shadow:var(--shadow2)
    }
    .side-box h2,.section-title h2{margin:0 0 10px;font-size:26px;line-height:1.2}
    .side-box p{margin:0;color:var(--muted);line-height:1.7}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}
    .tag{padding:8px 12px;border-radius:999px;background:#f4f7ff;border:1px solid #dde6ff;color:#28406a;font-size:13px}
    .panel-note{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:auto}
    .note-card{background:linear-gradient(180deg,#fff,#faf7f1);border:1px dashed #d8c8b6;border-radius:18px;padding:14px}
    .note-card strong{display:block;font-size:15px}
    .note-card span{display:block;color:var(--muted);font-size:13px;margin-top:4px;line-height:1.6}
    section{padding:18px 0}
    .section-title{display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:14px}
    .section-title p{margin:0;color:var(--muted);max-width:68ch;line-height:1.7}
    .grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
    .grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    .card{
      background:rgba(255,255,255,.9);border:1px solid var(--line);border-radius:var(--radius);
      box-shadow:var(--shadow2);padding:20px;transition:.25s ease
    }
    .card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
    .card h3{margin:0 0 10px;font-size:18px}
    .card p{margin:0;color:var(--muted);line-height:1.75}
    .metric{display:flex;flex-direction:column;gap:10px}
    .metric strong{font-size:30px;line-height:1}
    .metric span{color:var(--muted)}
    .chip-row{display:flex;flex-wrap:wrap;gap:10px}
    .chip{padding:8px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);font-size:13px;color:#344761}
    .steps{counter-reset:step}
    .step{position:relative;padding-top:8px}
    .step:before{
      counter-increment:step;content:counter(step, decimal-leading-zero);
      display:inline-flex;align-items:center;justify-content:center;width:42px;height:42px;border-radius:14px;
      background:linear-gradient(135deg, rgba(31,111,235,.12), rgba(255,143,61,.12));border:1px solid #eadfcf;
      margin-bottom:12px;font-weight:800;color:#1d3355
    }
    .step h3{margin-top:0}
    .table-wrap{overflow-x:auto;border-radius:20px;border:1px solid var(--line);background:#fff;box-shadow:var(--shadow2)}
    table{width:100%;border-collapse:collapse;min-width:760px}
    th,td{padding:16px 14px;border-bottom:1px solid #eee7dc;text-align:left;vertical-align:top}
    th{background:#faf6ef;color:#243041;font-size:14px}
    td{color:#46566a}
    tr:last-child td{border-bottom:none}
    .badge-good{display:inline-flex;padding:6px 10px;border-radius:999px;background:#eff6ff;color:#194b9b;font-weight:700;font-size:12px}
    .badge-warm{display:inline-flex;padding:6px 10px;border-radius:999px;background:#fff4e8;color:#9b4a00;font-weight:700;font-size:12px}
    .compare-card .rating{display:flex;align-items:center;gap:10px;margin-bottom:14px}
    .stars{color:#f39b11;font-size:18px;letter-spacing:2px}
    .review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
    .review{display:flex;flex-direction:column;gap:12px}
    .review .who{display:flex;align-items:center;justify-content:space-between;gap:10px}
    .avatar{width:42px;height:42px;border-radius:50%;display:grid;place-items:center;background:linear-gradient(135deg,#f4e6d8,#dce7ff);font-weight:800;color:#27405f}
    .review strong{display:block}
    .review small{color:var(--muted)}
    .timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .time-item{position:relative}
    .time-item .num{font-weight:800;color:#1c3557;font-size:14px;margin-bottom:10px}
    .time-item:after{
      content:"";position:absolute;left:20px;top:40px;right:-7px;height:2px;background:linear-gradient(90deg,#dbe6fb,transparent)
    }
    .time-item:last-child:after{display:none}
    .article-list{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    .article{
      padding:18px;border-radius:20px;border:1px solid var(--line);background:#fff;box-shadow:var(--shadow2)
    }
    .article a{display:block;font-weight:700;color:#20344e;margin-bottom:8px}
    .article p{margin:0;color:var(--muted);line-height:1.7}
    .faq details{
      background:#fff;border:1px solid var(--line);border-radius:18px;padding:16px 18px;box-shadow:var(--shadow2)
    }
    .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:12px 0 0;color:var(--muted);line-height:1.75}
    .contact-layout{display:grid;grid-template-columns:1fr .86fr;gap:14px;align-items:start}
    form{
      display:grid;grid-template-columns:repeat(2,1fr);gap:12px
    }
    .field{display:flex;flex-direction:column;gap:8px}
    .field.full{grid-column:1/-1}
    label{font-size:14px;font-weight:700;color:#314154}
    input,select,textarea{
      width:100%;border:1px solid #d8e0ea;background:#fff;color:var(--text);
      border-radius:14px;padding:12px 14px;font-size:15px;outline:none;transition:.2s ease
    }
    input:focus,select:focus,textarea:focus{border-color:#7da6ff;box-shadow:0 0 0 4px rgba(31,111,235,.1)}
    textarea{min-height:132px;resize:vertical}
    .form-actions{grid-column:1/-1;display:flex;flex-wrap:wrap;gap:12px;align-items:center}
    .contact-cards{display:grid;grid-template-columns:1fr 1fr;gap:14px}
    .contact-card{background:#fff;border:1px solid var(--line);border-radius:20px;padding:18px;box-shadow:var(--shadow2)}
    .contact-card h3{margin-top:0}
    .qrcode{width:160px;border-radius:18px;border:1px solid var(--line)}
    footer{
      margin-top:18px;padding:22px 0 30px;background:#f1ece2;border-top:1px solid #e2d8c9;color:#263445
    }
    .footer-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:18px}
    .footer-links{display:flex;flex-wrap:wrap;gap:10px}
    .footer-links a{background:#fff;border:1px solid var(--line);padding:8px 12px;border-radius:999px;color:#2d4056;font-size:13px}
    .copyright{margin-top:14px;color:#5a6878;font-size:13px;line-height:1.7}
    .floating{
      position:fixed;right:16px;bottom:18px;z-index:60;display:flex;flex-direction:column;gap:10px
    }
    .float-btn{
      width:48px;height:48px;border-radius:16px;background:#fff;border:1px solid var(--line);
      box-shadow:var(--shadow2);display:grid;place-items:center;color:#1f3f68;font-weight:800
    }
    .float-btn.primary{background:linear-gradient(135deg,var(--brand),var(--brand3));color:#fff;border:none}
    .reveal{opacity:0;transform:translateY(18px);transition:.6s ease}
    .reveal.show{opacity:1;transform:none}
    .mobile-only{display:none}
    @media (max-width: 1024px){
      .hero-grid,.contact-layout,.footer-grid,.grid-4,.grid-3,.review-grid,.timeline,.grid-2,.hero-points{grid-template-columns:1fr 1fr}
      .hero-grid{grid-template-columns:1fr}
      .panel-note,.article-list{grid-template-columns:1fr}
    }
    @media (max-width: 760px){
      .container{width:min(100% - 22px, var(--container))}
      .nav-links,.nav-actions .btn-light{display:none}
      .menu-btn{display:inline-flex}
      .nav.open .nav-links{
        display:flex;position:absolute;left:0;right:0;top:100%;padding:14px 16px 16px;background:rgba(255,252,247,.98);
        border-bottom:1px solid var(--line);flex-direction:column;align-items:flex-start;box-shadow:var(--shadow2)
      }
      .nav{position:relative}
      .hero-main{padding:22px}
      .hero-points,.grid-4,.grid-3,.grid-2,.review-grid,.timeline,.contact-layout,.footer-grid,.hero-grid{grid-template-columns:1fr}
      .section-title{align-items:flex-start;flex-direction:column}
      form{grid-template-columns:1fr}
      .mobile-only{display:block}
      .time-item:after{display:none}
      .floating{right:12px;bottom:12px}
    }