:root{
      --bg:#f6f3ee;
      --panel:#fffdf9;
      --panel-2:#f8f4ef;
      --text:#1f2937;
      --muted:#5f6b7a;
      --line:#e7ddd1;
      --accent:#7c5cff;
      --accent-2:#16b8a6;
      --accent-3:#ff9f43;
      --shadow:0 18px 40px rgba(44, 33, 88, .08);
      --radius:22px;
      --radius-sm:16px;
      --container:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:system-ui,-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(124,92,255,.09), transparent 30%),
        radial-gradient(circle at top right, rgba(22,184,166,.10), transparent 28%),
        linear-gradient(180deg, #fbfaf7 0%, var(--bg) 28%, #f8f5f0 100%);
      line-height:1.7;
      overflow-x:hidden;
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%;height:auto}
    .container{max-width:var(--container);margin:0 auto;padding:0 20px}
    .topbar{
      position:sticky;top:0;z-index:50;
      backdrop-filter:blur(16px);
      background:rgba(246,243,238,.84);
      border-bottom:1px solid rgba(231,221,209,.75);
    }
    .nav{
      display:flex;align-items:center;justify-content:space-between;gap:18px;
      min-height:74px;
    }
    .brand{display:flex;align-items:center;gap:12px;font-weight:800}
    .brand .ai-page-logo{width:42px;height:42px;object-fit:contain;border-radius:12px;background:#fff;border:1px solid var(--line);padding:5px;box-shadow:0 8px 20px rgba(0,0,0,.05)}
    .brand strong{font-size:1.05rem;letter-spacing:.5px}
    .brand span{display:block;font-size:.8rem;color:var(--muted);font-weight:600}
    .menu-toggle{
      display:none;border:1px solid var(--line);background:#fff;color:var(--text);
      border-radius:14px;padding:10px 14px;font-weight:700;cursor:pointer
    }
    .nav-links{display:flex;align-items:center;gap:14px;flex-wrap:wrap;justify-content:flex-end}
    .nav-links a{
      color:var(--muted);font-size:.95rem;font-weight:700;padding:10px 8px;border-radius:10px;
      transition:.2s ease
    }
    .nav-links a:hover,.nav-links a:focus{color:var(--text);background:rgba(124,92,255,.08)}
    .home-link{color:#fff !important;background:linear-gradient(135deg,var(--accent),#5b8cff);padding:10px 16px !important;box-shadow:0 10px 24px rgba(124,92,255,.22)}
    .hero{
      padding:48px 0 28px;
      position:relative;
    }
    .hero-grid{
      display:grid;grid-template-columns:1.25fr .75fr;gap:22px;align-items:stretch
    }
    .hero-card{
      background:
        linear-gradient(145deg, rgba(255,255,255,.9), rgba(248,244,239,.95)),
        linear-gradient(135deg, rgba(124,92,255,.12), rgba(22,184,166,.08));
      border:1px solid rgba(231,221,209,.9);
      border-radius:28px;
      box-shadow:var(--shadow);
      padding:30px;
      overflow:hidden;
      position:relative;
    }
    .hero-card::before,.hero-card::after{
      content:"";position:absolute;border-radius:50%;pointer-events:none
    }
    .hero-card::before{width:240px;height:240px;background:radial-gradient(circle, rgba(124,92,255,.12), transparent 65%);right:-70px;top:-70px}
    .hero-card::after{width:180px;height:180px;background:radial-gradient(circle, rgba(22,184,166,.12), transparent 65%);left:-50px;bottom:-50px}
    .eyebrow{
      display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;
      background:rgba(124,92,255,.08);color:#5f49c6;font-size:.88rem;font-weight:800
    }
    h1{margin:16px 0 12px;font-size:clamp(2rem,4vw,3.5rem);line-height:1.08;letter-spacing:-.04em}
    .lead{margin:0;color:var(--muted);font-size:1.05rem;max-width:62ch}
    .hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin:22px 0 18px}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      border-radius:14px;padding:13px 18px;font-weight:800;border:1px solid transparent;
      transition:transform .18s ease, box-shadow .18s ease, background .18s ease;
      cursor:pointer;min-height:48px
    }
    .btn:hover{transform:translateY(-2px)}
    .btn-primary{background:linear-gradient(135deg,var(--accent),#4c9eff);color:#fff;box-shadow:0 16px 30px rgba(124,92,255,.22)}
    .btn-secondary{background:#fff;color:var(--text);border-color:var(--line)}
    .hero-points{
      display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:18px
    }
    .mini{
      background:rgba(255,255,255,.72);border:1px solid var(--line);border-radius:18px;padding:14px 14px 13px
    }
    .mini b{display:block;font-size:1.02rem;margin-bottom:3px}
    .mini span{color:var(--muted);font-size:.92rem}
    .hero-side{
      display:grid;gap:14px
    }
    .side-card{
      background:linear-gradient(180deg, rgba(255,255,255,.92), rgba(248,244,239,.96));
      border:1px solid rgba(231,221,209,.9);border-radius:24px;box-shadow:var(--shadow);padding:20px
    }
    .metric-grid{
      display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px
    }
    .metric{
      background:linear-gradient(180deg,#fff, #fbf7f1);
      border:1px solid var(--line);border-radius:20px;padding:18px;min-height:112px
    }
    .metric strong{display:block;font-size:1.7rem;line-height:1;color:#1e2a48}
    .metric span{display:block;color:var(--muted);margin-top:8px;font-size:.92rem}
    .section{padding:22px 0}
    .section-header{display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:16px}
    .section-title{margin:0;font-size:clamp(1.5rem,2.2vw,2.2rem);line-height:1.2}
    .section-desc{margin:0;color:var(--muted);max-width:72ch}
    .grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
    .card{
      background:rgba(255,255,255,.88);border:1px solid var(--line);border-radius:24px;padding:20px;box-shadow:0 10px 24px rgba(32,38,54,.05);
      transition:transform .18s ease, box-shadow .18s ease
    }
    .card:hover{transform:translateY(-3px);box-shadow:0 18px 34px rgba(32,38,54,.08)}
    .icon{
      width:46px;height:46px;border-radius:14px;display:grid;place-items:center;margin-bottom:14px;
      background:linear-gradient(135deg,rgba(124,92,255,.12),rgba(22,184,166,.12));color:#4a4b9f;font-weight:900
    }
    .card h3,.card h4{margin:0 0 10px;line-height:1.25}
    .card p{margin:0;color:var(--muted)}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag{
      padding:9px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);font-size:.92rem;color:#405063;font-weight:700
    }
    .timeline{display:grid;gap:12px}
    .step{
      display:grid;grid-template-columns:auto 1fr;gap:14px;align-items:start;
      padding:18px 18px;border-radius:20px;background:linear-gradient(180deg, #fff, #faf6f1);border:1px solid var(--line)
    }
    .step-num{
      width:38px;height:38px;border-radius:13px;display:grid;place-items:center;font-weight:900;color:#fff;
      background:linear-gradient(135deg,var(--accent-2),#30c2f0)
    }
    .table-wrap{overflow-x:auto;border-radius:22px;border:1px solid var(--line);background:#fff;box-shadow:var(--shadow)}
    table{width:100%;border-collapse:collapse;min-width:860px}
    th,td{padding:16px 14px;border-bottom:1px solid #efe8df;text-align:left;vertical-align:top}
    th{background:#fbf8f3;font-size:.95rem}
    td{color:#3d4958}
    .rating{
      display:grid;grid-template-columns:1.2fr .8fr;gap:16px;align-items:stretch
    }
    .rating-box{
      border-radius:24px;background:linear-gradient(135deg, rgba(124,92,255,.12), rgba(22,184,166,.10));border:1px solid rgba(124,92,255,.18);padding:22px
    }
    .stars{font-size:1.4rem;letter-spacing:3px;color:#ffab22}
    .faq details{
      border:1px solid var(--line);border-radius:18px;background:#fff;padding:0 18px;box-shadow:0 8px 20px rgba(32,38,54,.04)
    }
    .faq details+details{margin-top:12px}
    .faq summary{cursor:pointer;list-style:none;padding:16px 0;font-weight:800}
    .faq summary::-webkit-details-marker{display:none}
    .faq .answer{padding:0 0 16px;color:var(--muted)}
    .review-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .quote{
      position:relative
    }
    .quote::before{
      content:"“";position:absolute;top:12px;right:18px;font-size:4rem;color:rgba(124,92,255,.12);font-weight:900;line-height:1
    }
    .quote .meta{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:14px;color:var(--muted);font-size:.92rem}
    .case-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
    .case-card{
      display:grid;grid-template-columns:140px 1fr;gap:16px;align-items:start
    }
    .case-thumb{
      border-radius:18px;overflow:hidden;border:1px solid var(--line);background:#fff;aspect-ratio:1/1;display:grid;place-items:center
    }
    .case-thumb img{width:100%;height:100%;object-fit:cover}
    .article-list{display:grid;gap:12px}
    .article-item{
      display:flex;justify-content:space-between;gap:14px;align-items:center;padding:15px 16px;border:1px solid var(--line);border-radius:18px;background:#fff
    }
    .article-item strong{display:block}
    .article-item span{display:block;color:var(--muted);font-size:.9rem;margin-top:4px}
    .form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
    .form-panel{background:#fff;border:1px solid var(--line);border-radius:24px;padding:22px;box-shadow:var(--shadow)}
    .field{display:flex;flex-direction:column;gap:8px;margin-bottom:14px}
    .field label{font-weight:700;color:#334155;font-size:.94rem}
    .field input,.field select,.field textarea{
      border:1px solid #dcd3c7;border-radius:14px;background:#fbfaf7;padding:13px 14px;font:inherit;color:var(--text)
    }
    .field textarea{min-height:120px;resize:vertical}
    .contact-box{
      display:grid;gap:14px
    }
    .contact-item{
      padding:16px;border-radius:18px;background:linear-gradient(180deg,#fff,#fbf8f3);border:1px solid var(--line)
    }
    .floating{
      position:fixed;right:18px;bottom:18px;z-index:60;display:grid;gap:10px
    }
    .float-btn{
      width:52px;height:52px;border-radius:18px;border:none;box-shadow:0 14px 26px rgba(32,38,54,.16);cursor:pointer;
      background:linear-gradient(135deg,var(--accent),#4c9eff);color:#fff;font-weight:900
    }
    .float-panel{
      position:absolute;right:0;bottom:64px;width:min(320px,calc(100vw - 36px));
      background:#fff;border:1px solid var(--line);border-radius:22px;padding:16px;box-shadow:var(--shadow);display:none
    }
    .floating.open .float-panel{display:block}
    .qrcode{display:grid;grid-template-columns:112px 1fr;gap:14px;align-items:center}
    .qrcode img{width:112px;height:112px;object-fit:cover;border-radius:16px;border:1px solid var(--line)}
    footer{
      margin-top:18px;
      background:#f2ede6;
      border-top:1px solid var(--line);
      color:#2b3644;
      padding:24px 0 28px
    }
    footer a{color:#253b7c;font-weight:700}
    .footer-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:18px}
    .copyright{margin-top:14px;color:#5c6674;font-size:.92rem}
    .fade-up{opacity:0;transform:translateY(12px);transition:opacity .7s ease, transform .7s ease}
    .fade-up.in{opacity:1;transform:none}
    .subtle-note{font-size:.9rem;color:var(--muted)}
    .scroll-top{
      position:fixed;left:18px;bottom:18px;z-index:60;border:none;border-radius:999px;padding:12px 16px;background:#fff;border:1px solid var(--line);box-shadow:0 12px 24px rgba(32,38,54,.12);cursor:pointer;color:var(--text);font-weight:800;display:none
    }
    .scroll-top.show{display:block}
    .banner-row{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}
    .banner-row img{border-radius:18px;border:1px solid var(--line);aspect-ratio:1/1;object-fit:cover;background:#fff}
    .inline-links{display:flex;flex-wrap:wrap;gap:10px}
    .inline-links a{display:inline-flex;padding:9px 12px;border:1px solid var(--line);border-radius:999px;background:#fff}
    @media (max-width: 960px){
      .hero-grid,.rating,.footer-grid,.case-grid,.form-grid,.review-grid,.grid-4,.grid-3,.banner-row{grid-template-columns:1fr 1fr}
      .nav-links{display:none;position:absolute;left:20px;right:20px;top:74px;background:#fff;border:1px solid var(--line);border-radius:20px;padding:14px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}
      .nav-links.open{display:flex}
      .nav-links a{padding:12px 14px}
      .menu-toggle{display:inline-flex}
    }
    @media (max-width: 720px){
      .hero-grid,.rating,.footer-grid,.case-grid,.form-grid,.review-grid,.grid-4,.grid-3,.banner-row,.hero-points,.metric-grid{grid-template-columns:1fr}
      .hero-card,.side-card,.card,.form-panel{padding:18px}
      .case-card{grid-template-columns:1fr}
      .section-header{align-items:start;flex-direction:column}
      .qrcode{grid-template-columns:1fr}
      .nav{position:relative}
    }