:root{
      --bg:#fff9f5;
      --surface:#ffffff;
      --surface-2:#fff1ee;
      --line:#f0d6d4;
      --text:#1f2430;
      --muted:#667085;
      --primary:#ff4d6d;
      --primary-2:#ff8a3d;
      --accent:#5b6cff;
      --shadow:0 16px 40px rgba(31,36,48,.08);
      --shadow-2:0 10px 28px rgba(255,77,109,.16);
      --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",sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(255,77,109,.10), transparent 28%),
        radial-gradient(circle at top right, rgba(91,108,255,.10), transparent 22%),
        linear-gradient(180deg, #fffdfb 0%, var(--bg) 48%, #fff 100%);
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%;height:auto}
    .container{width:min(var(--container), calc(100% - 32px)); margin:0 auto}
    .site-header{
      position:sticky;top:0;z-index:60;
      backdrop-filter:saturate(180%) blur(18px);
      background:rgba(255,249,245,.82);
      border-bottom:1px solid rgba(240,214,212,.8);
    }
    .nav{
      display:flex;align-items:center;justify-content:space-between;gap:18px;
      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;box-shadow:0 8px 20px rgba(0,0,0,.05)}
    .brand-title{font-weight:800;letter-spacing:.4px}
    .brand-sub{font-size:12px;color:var(--muted);margin-top:2px}
    .nav-links{display:flex;align-items:center;gap:16px;flex-wrap:wrap;justify-content:flex-end}
    .nav-links a{font-size:14px;color:#344054;padding:8px 10px;border-radius:999px;transition:.25s ease}
    .nav-links a:hover,.nav-links a:focus{background:#fff;color:var(--primary);box-shadow:0 8px 18px rgba(255,77,109,.12)}
    .nav-cta{display:flex;align-items:center;gap:10px}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      border:0;border-radius:999px;padding:12px 18px;font-weight:700;cursor:pointer;
      transition:transform .2s ease, box-shadow .2s ease, background .2s ease, color .2s ease;
      white-space:nowrap
    }
    .btn:hover{transform:translateY(-2px)}
    .btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary-2));color:#fff;box-shadow:var(--shadow-2)}
    .btn-ghost{background:#fff;color:var(--text);border:1px solid var(--line)}
    .menu-toggle{display:none;background:#fff;border:1px solid var(--line);width:44px;height:44px;border-radius:12px;align-items:center;justify-content:center}
    .menu-toggle span,.menu-toggle span:before,.menu-toggle span:after{
      content:"";display:block;width:18px;height:2px;background:#263238;border-radius:2px;position:relative
    }
    .menu-toggle span:before,.menu-toggle span:after{position:absolute;left:0}
    .menu-toggle span:before{top:-6px}.menu-toggle span:after{top:6px}
    .hero{
      padding:34px 0 22px;
    }
    .hero-grid{
      display:grid;grid-template-columns:1.12fr .88fr;gap:22px;align-items:stretch;
    }
    .hero-panel{
      position:relative;overflow:hidden;border-radius:28px;padding:34px 28px;
      background:
        linear-gradient(135deg, rgba(255,77,109,.96), rgba(255,138,61,.94) 55%, rgba(91,108,255,.92));
      color:#fff;box-shadow:0 22px 50px rgba(255,77,109,.18);
      isolation:isolate;
    }
    .hero-panel:before,.hero-panel:after{
      content:"";position:absolute;border-radius:50%;background:rgba(255,255,255,.15);filter:blur(8px);z-index:-1
    }
    .hero-panel:before{width:220px;height:220px;right:-70px;top:-40px}
    .hero-panel:after{width:160px;height:160px;left:-60px;bottom:-50px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;background:rgba(255,255,255,.16);font-size:13px;font-weight:700}
    h1{margin:16px 0 12px;font-size:clamp(30px,5vw,52px);line-height:1.12;letter-spacing:-.8px}
    .hero-desc{font-size:16px;line-height:1.75;max-width:42rem;color:rgba(255,255,255,.94)}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}
    .hero-meta{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:22px}
    .mini-stat{
      background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.18);border-radius:18px;padding:14px 14px 15px
    }
    .mini-stat strong{display:block;font-size:18px;margin-bottom:5px}
    .mini-stat span{font-size:13px;color:rgba(255,255,255,.84);line-height:1.55}
    .hero-side{
      display:grid;gap:14px;grid-template-rows:auto auto 1fr;
    }
    .card{
      background:var(--surface);border:1px solid rgba(240,214,212,.95);border-radius:24px;box-shadow:var(--shadow);
    }
    .card-pad{padding:22px}
    .info-strip{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
    .info-item{
      background:linear-gradient(180deg,#fff,#fff8f7);border:1px solid rgba(240,214,212,.9);border-radius:18px;padding:16px
    }
    .info-item .label{font-size:13px;color:var(--muted);margin-bottom:8px}
    .info-item .value{font-size:22px;font-weight:800}
    .info-item .desc{margin-top:6px;font-size:13px;line-height:1.6;color:#475467}
    .side-title{font-size:18px;font-weight:800;margin:0 0 10px}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag-cloud span{
      padding:8px 12px;border-radius:999px;background:#fff3f1;color:#b42318;border:1px solid #ffd8d3;font-size:13px
    }
    .section{padding:18px 0 2px}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:16px}
    .section-head h2{margin:0;font-size:clamp(24px,3vw,34px)}
    .section-head p{margin:0;color:var(--muted);line-height:1.7;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}
    .grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    .feature{
      padding:20px;border-radius:22px;background:linear-gradient(180deg,#fff,#fffaf8);border:1px solid rgba(240,214,212,.95);box-shadow:0 10px 24px rgba(31,36,48,.05);
      transition:transform .2s ease, box-shadow .2s ease
    }
    .feature:hover{transform:translateY(-4px);box-shadow:0 16px 34px rgba(31,36,48,.09)}
    .feature .icon{width:44px;height:44px;border-radius:14px;display:grid;place-items:center;background:linear-gradient(135deg,rgba(255,77,109,.13),rgba(91,108,255,.12));font-size:22px;margin-bottom:14px}
    .feature h3{margin:0 0 8px;font-size:18px}
    .feature p{margin:0;color:#475467;line-height:1.72;font-size:14px}
    .metric{
      padding:20px;border-radius:22px;background:#fff;border:1px solid rgba(240,214,212,.95);position:relative;overflow:hidden
    }
    .metric:after{content:"";position:absolute;inset:auto -14px -18px auto;width:90px;height:90px;background:radial-gradient(circle, rgba(255,77,109,.14), transparent 68%)}
    .metric strong{display:block;font-size:28px}
    .metric span{color:var(--muted);font-size:13px}
    .timeline{display:grid;gap:12px}
    .step{
      display:flex;gap:14px;padding:18px;border-radius:20px;background:#fff;border:1px solid rgba(240,214,212,.95)
    }
    .num{flex:0 0 40px;width:40px;height:40px;border-radius:14px;background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;display:grid;place-items:center;font-weight:800}
    .step h3{margin:0 0 6px;font-size:17px}
    .step p{margin:0;color:#475467;line-height:1.7;font-size:14px}
    .table-wrap{overflow:auto;border:1px solid rgba(240,214,212,.95);border-radius:22px;background:#fff;box-shadow:var(--shadow)}
    table{width:100%;border-collapse:collapse;min-width:840px}
    th,td{padding:16px 14px;border-bottom:1px solid #f3e2de;text-align:left;vertical-align:top}
    th{background:#fff7f5;font-size:14px}
    td{color:#374151;font-size:14px;line-height:1.6}
    .rating-box{
      background:linear-gradient(135deg,#fff7f4,#fff);border:1px solid rgba(240,214,212,.95);border-radius:24px;padding:24px
    }
    .stars{color:#ff9f1c;font-size:22px;letter-spacing:2px}
    .score{display:flex;flex-wrap:wrap;gap:14px;align-items:end;margin-top:10px}
    .score strong{font-size:48px;line-height:1;color:#111827}
    .score span{color:var(--muted)}
    .review{
      padding:20px;border-radius:22px;background:#fff;border:1px solid rgba(240,214,212,.95)
    }
    .review .top{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:10px}
    .review .name{font-weight:800}
    .review .role{font-size:13px;color:var(--muted)}
    .review p{margin:0;color:#475467;line-height:1.75;font-size:14px}
    .article-list{display:grid;gap:12px}
    .article{
      display:flex;justify-content:space-between;gap:16px;align-items:center;padding:18px 20px;border-radius:20px;background:#fff;border:1px solid rgba(240,214,212,.95)
    }
    .article strong{display:block;margin-bottom:5px}
    .article span{color:var(--muted);font-size:13px}
    .article em{font-style:normal;color:var(--primary);font-weight:700}
    .form{
      display:grid;grid-template-columns:repeat(2,1fr);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 #e8d8d6;background:#fff;border-radius:14px;padding:13px 14px;font:inherit;color:var(--text);outline:none;transition:border-color .2s ease, box-shadow .2s ease
    }
    input:focus,select:focus,textarea:focus{border-color:rgba(255,77,109,.7);box-shadow:0 0 0 4px rgba(255,77,109,.10)}
    textarea{min-height:120px;resize:vertical}
    .form-actions{grid-column:1/-1;display:flex;flex-wrap:wrap;gap:12px;align-items:center}
    .note{font-size:13px;color:var(--muted);line-height:1.6}
    .footer{
      margin-top:18px;background:#111827;color:#e5e7eb;padding:28px 0 22px
    }
    .footer a{color:#fff}
    .footer-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:20px;align-items:start}
    .footer .brand-sub,.footer .note,.footer .small{color:#cbd5e1}
    .footer .btn-ghost{background:#1f2937;border-color:#374151;color:#fff}
    .kefu-float{
      position:fixed;right:16px;bottom:16px;z-index:70;display:flex;flex-direction:column;gap:10px
    }
    .float-btn{
      width:52px;height:52px;border-radius:16px;display:grid;place-items:center;background:linear-gradient(135deg,var(--primary),var(--primary-2));color:#fff;box-shadow:0 16px 28px rgba(255,77,109,.24)
    }
    .float-panel{
      position:absolute;right:0;bottom:62px;width:min(280px, calc(100vw - 32px));background:#fff;border:1px solid rgba(240,214,212,.95);
      border-radius:20px;box-shadow:var(--shadow);padding:14px;display:none
    }
    .float-panel.show{display:block}
    .accordion{display:grid;gap:12px}
    details{
      background:#fff;border:1px solid rgba(240,214,212,.95);border-radius:18px;overflow:hidden
    }
    summary{
      cursor:pointer;list-style:none;padding:18px 20px;font-weight:800;display:flex;justify-content:space-between;gap:12px
    }
    summary::-webkit-details-marker{display:none}
    details p{margin:0;padding:0 20px 18px;color:#475467;line-height:1.75}
    .anchor-bar{
      display:flex;flex-wrap:wrap;gap:10px;margin:14px 0 0
    }
    .anchor-bar a{
      font-size:13px;padding:8px 11px;border-radius:999px;background:#fff;border:1px solid var(--line);color:#344054
    }
    .muted{color:var(--muted)}
    .center{text-align:center}
    .spacer{height:2px}
    @media (max-width: 1100px){
      .hero-grid,.footer-grid,.grid-4{grid-template-columns:1fr 1fr}
      .grid-3{grid-template-columns:1fr 1fr}
    }
    @media (max-width: 820px){
      .nav-links,.nav-cta{display:none}
      .menu-toggle{display:inline-flex}
      .mobile-nav{
        display:none; padding:0 0 16px;
      }
      .mobile-nav.show{display:block}
      .mobile-nav .nav-links{display:grid;grid-template-columns:1fr 1fr;gap:10px}
      .mobile-nav .nav-links a{background:#fff;border:1px solid var(--line);text-align:center}
      .hero-grid,.footer-grid,.grid-4,.grid-3,.grid-2,.form{grid-template-columns:1fr}
      .hero{padding-top:22px}
      .hero-meta,.info-strip{grid-template-columns:1fr}
      .section-head{align-items:start;flex-direction:column}
      .article{flex-direction:column;align-items:flex-start}
    }
    @media (max-width: 520px){
      .container{width:min(var(--container), calc(100% - 22px))}
      .hero-panel{padding:26px 18px;border-radius:24px}
      .card-pad{padding:18px}
      h1{font-size:28px}
      .btn{padding:11px 15px}
      .hero-actions,.form-actions{flex-direction:column;align-items:stretch}
      .hero-actions .btn,.form-actions .btn{width:100%}
    }
    .reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease, transform .6s ease}
    .reveal.in{opacity:1;transform:none}