:root{
      --bg:#f5f8ff;
      --panel:#ffffff;
      --panel-2:#f8fbff;
      --text:#122033;
      --muted:#5d6b81;
      --line:#dce6f5;
      --brand:#3b6cff;
      --brand-2:#7c4dff;
      --accent:#13b5a6;
      --warm:#ff8f5b;
      --shadow:0 18px 50px rgba(21, 45, 94, .10);
      --shadow-soft:0 10px 24px rgba(21, 45, 94, .08);
      --radius:22px;
      --radius-sm:14px;
      --container:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:Inter,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(59,108,255,.12), transparent 26%),
        radial-gradient(circle at top right, rgba(124,77,255,.10), transparent 22%),
        linear-gradient(180deg, #f8fbff 0%, #f5f8ff 45%, #f4f8ff 100%);
    }
    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:30;
      backdrop-filter:saturate(1.2) blur(18px);
      background:rgba(245,248,255,.86);
      border-bottom:1px solid rgba(220,230,245,.7);
    }
    .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:var(--shadow-soft); padding:4px}
    .brand-text{min-width:0}
    .brand-text strong{display:block; font-size:1.02rem; letter-spacing:.4px}
    .brand-text span{display:block; color:var(--muted); font-size:.88rem; margin-top:2px}
    .nav-toggle{
      display:none; border:1px solid var(--line); background:#fff; color:var(--text);
      border-radius:12px; padding:10px 12px; cursor:pointer; box-shadow:var(--shadow-soft)
    }
    .nav-links{display:flex; align-items:center; gap:16px; flex-wrap:wrap; justify-content:flex-end}
    .nav-links a{font-size:.95rem; color:#28405f; padding:8px 10px; border-radius:10px; transition:.2s ease}
    .nav-links a:hover{background:rgba(59,108,255,.08); color:var(--brand)}
    .btn{
      display:inline-flex; align-items:center; justify-content:center; gap:8px;
      border:none; border-radius:999px; cursor:pointer; font-weight:700; letter-spacing:.2px;
      transition:.22s ease; padding:12px 18px;
    }
    .btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand-2)); color:#fff; box-shadow:0 14px 28px rgba(59,108,255,.22)}
    .btn-secondary{background:#fff; color:var(--text); border:1px solid var(--line)}
    .btn:hover{transform:translateY(-1px); box-shadow:var(--shadow)}
    .hero{
      padding:30px 0 16px;
    }
    .hero-shell{
      position:relative; overflow:hidden;
      border:1px solid rgba(220,230,245,.8);
      background:
        linear-gradient(135deg, rgba(59,108,255,.10), rgba(124,77,255,.08)),
        linear-gradient(180deg, #fff, #f8fbff);
      border-radius:30px;
      box-shadow:var(--shadow);
    }
    .hero-shell:before,.hero-shell:after{
      content:""; position:absolute; border-radius:999px; pointer-events:none; filter:blur(2px)
    }
    .hero-shell:before{width:240px;height:240px; right:-80px; top:-60px; background:radial-gradient(circle, rgba(19,181,166,.22), transparent 62%)}
    .hero-shell:after{width:300px;height:300px; left:-120px; bottom:-130px; background:radial-gradient(circle, rgba(124,77,255,.14), transparent 65%)}
    .hero-grid{
      display:grid; grid-template-columns:1.25fr .75fr; gap:22px; align-items:center;
      padding:34px;
    }
    h1{margin:0 0 14px; font-size:clamp(2rem, 4vw, 3.6rem); line-height:1.08; letter-spacing:-.5px}
    .hero p{margin:0; color:var(--muted); font-size:1.02rem; line-height:1.8}
    .hero-actions{display:flex; flex-wrap:wrap; gap:12px; margin-top:22px}
    .hero-badges{display:flex; flex-wrap:wrap; gap:10px; margin-top:20px}
    .badge{padding:9px 12px; background:rgba(255,255,255,.72); border:1px solid var(--line); border-radius:999px; color:#32506f; font-size:.92rem}
    .hero-aside{
      display:grid; gap:14px
    }
    .glass{
      background:rgba(255,255,255,.84); border:1px solid rgba(220,230,245,.88); border-radius:22px; box-shadow:var(--shadow-soft)
    }
    .hero-card{padding:18px}
    .hero-card h3{margin:0 0 10px; font-size:1.02rem}
    .hero-card ul{margin:0; padding:0; list-style:none; display:grid; gap:10px}
    .hero-card li{display:flex; justify-content:space-between; gap:12px; color:#29415f; font-size:.94rem}
    .hero-card li span{color:var(--muted)}
    .section{padding:22px 0}
    .section-head{display:flex; justify-content:space-between; align-items:end; gap:16px; margin-bottom:16px}
    .section-head h2{margin:0; font-size:1.65rem}
    .section-head p{margin:0; color:var(--muted); line-height:1.7; max-width:70ch}
    .grid-4{display:grid; grid-template-columns:repeat(4,1fr); gap:16px}
    .grid-3{display:grid; grid-template-columns:repeat(3,1fr); gap:16px}
    .grid-2{display:grid; grid-template-columns:repeat(2,1fr); gap:16px}
    .card{
      background:var(--panel);
      border:1px solid var(--line);
      border-radius:var(--radius);
      box-shadow:var(--shadow-soft);
      padding:18px;
      transition:transform .22s ease, box-shadow .22s ease, border-color .22s ease;
    }
    .card:hover{transform:translateY(-4px); box-shadow:var(--shadow); border-color:#cbd9f1}
    .metric strong{display:block; font-size:1.8rem; line-height:1.1}
    .metric span{display:block; margin-top:6px; color:var(--muted)}
    .tag-cloud{display:flex; flex-wrap:wrap; gap:10px}
    .tag-cloud span{padding:9px 12px; border-radius:999px; background:#fff; border:1px solid var(--line); color:#314966; font-size:.92rem}
    .service-list{display:grid; grid-template-columns:repeat(2,1fr); gap:14px}
    .service{
      background:linear-gradient(180deg,#fff, #fbfdff);
      border:1px solid var(--line);
      border-radius:20px; padding:18px; box-shadow:var(--shadow-soft)
    }
    .service h3{margin:0 0 10px; font-size:1.03rem}
    .service p,.service li{color:var(--muted); line-height:1.75}
    .service ul{margin:0; padding-left:18px}
    .flow{display:grid; grid-template-columns:repeat(4,1fr); gap:14px}
    .step{position:relative; padding:18px}
    .step .num{display:inline-flex; width:38px; height:38px; align-items:center; justify-content:center; border-radius:12px; color:#fff; background:linear-gradient(135deg,var(--brand),var(--brand-2)); font-weight:800; margin-bottom:10px}
    .step h3{margin:0 0 8px; font-size:1.02rem}
    .step p{margin:0; color:var(--muted); line-height:1.75}
    .table-wrap{overflow:auto; border-radius:22px; border:1px solid var(--line); background:#fff; box-shadow:var(--shadow-soft)}
    table{width:100%; border-collapse:collapse; min-width:860px; background:#fff}
    th,td{padding:14px 16px; border-bottom:1px solid #e7eef8; text-align:left; vertical-align:top}
    th{background:#f5f8ff; color:#20324a; font-size:.95rem}
    td{color:#35506f}
    .highlight{color:#0f8a77; font-weight:700}
    .rating{
      display:grid; grid-template-columns:1.2fr .8fr; gap:16px; align-items:stretch
    }
    .score{
      background:linear-gradient(135deg, rgba(59,108,255,.12), rgba(19,181,166,.12));
      border:1px solid rgba(59,108,255,.16); border-radius:22px; padding:20px
    }
    .score .big{font-size:3rem; font-weight:900; line-height:1}
    .score small{color:var(--muted)}
    .accordion{display:grid; gap:12px}
    .faq-item{border:1px solid var(--line); border-radius:18px; overflow:hidden; background:#fff; box-shadow:var(--shadow-soft)}
    .faq-q{
      width:100%; text-align:left; padding:16px 18px; background:transparent; border:none; cursor:pointer;
      display:flex; justify-content:space-between; gap:16px; align-items:center; color:var(--text); font-size:1rem; font-weight:700
    }
    .faq-q span{color:var(--brand)}
    .faq-a{max-height:0; overflow:hidden; transition:max-height .28s ease, padding .28s ease; color:var(--muted); line-height:1.75; padding:0 18px}
    .faq-item.open .faq-a{padding:0 18px 16px; max-height:220px}
    .reviews{display:grid; grid-template-columns:repeat(3,1fr); gap:16px}
    .review p{margin:0 0 14px; color:#31475f; line-height:1.8}
    .review .who{display:flex; justify-content:space-between; gap:12px; color:var(--muted); font-size:.93rem}
    .gallery{display:grid; grid-template-columns:repeat(3,1fr); gap:16px}
    .gallery .card{padding:12px}
    .gallery .ai-page-image{width:100%; aspect-ratio:4/3; object-fit:cover; border-radius:16px; border:1px solid var(--line); background:#eef4ff}
    .article-list{display:grid; grid-template-columns:repeat(2,1fr); gap:14px}
    .article{padding:18px}
    .article h3{margin:0 0 10px; font-size:1.03rem}
    .article p{margin:0 0 12px; color:var(--muted); line-height:1.75}
    .article a{color:var(--brand); font-weight:700}
    .form-grid{
      display:grid; grid-template-columns:1fr 1fr; gap:14px
    }
    .field{display:grid; gap:8px}
    .field label{font-weight:700; color:#23374f}
    .field input,.field select,.field textarea{
      width:100%; border:1px solid var(--line); background:#fff; color:var(--text);
      border-radius:14px; padding:13px 14px; font:inherit; outline:none; transition:border-color .2s ease, box-shadow .2s ease
    }
    .field textarea{min-height:120px; resize:vertical}
    .field input:focus,.field select:focus,.field textarea:focus{border-color:rgba(59,108,255,.65); box-shadow:0 0 0 4px rgba(59,108,255,.08)}
    .form-actions{display:flex; flex-wrap:wrap; gap:12px; align-items:center; margin-top:14px}
    .footer{
      margin-top:8px; padding:24px 0 22px; border-top:1px solid rgba(220,230,245,.9);
      background:linear-gradient(180deg, rgba(245,248,255,.5), rgba(243,247,255,.95));
    }
    .footer-grid{display:grid; grid-template-columns:1.2fr .8fr; gap:18px}
    .footer a{color:#24476f}
    .footer small,.footer p,.footer li{color:#53647a; line-height:1.75}
    .footer ul{margin:0; padding-left:18px}
    .floating{
      position:fixed; right:16px; bottom:16px; z-index:40; display:grid; gap:10px
    }
    .floating a,.floating button{
      display:inline-flex; align-items:center; justify-content:center; min-width:54px; min-height:54px;
      border-radius:18px; border:1px solid var(--line); background:#fff; box-shadow:var(--shadow-soft); color:var(--text); cursor:pointer
    }
    .backtop{opacity:0; pointer-events:none; transform:translateY(8px); transition:.2s ease}
    .backtop.show{opacity:1; pointer-events:auto; transform:translateY(0)}
    .hero-mini{display:grid; grid-template-columns:repeat(3,1fr); gap:12px; margin-top:16px}
    .mini{padding:14px 16px; border-radius:18px; background:rgba(255,255,255,.75); border:1px solid var(--line)}
    .mini strong{display:block; font-size:1.05rem}
    .mini span{display:block; color:var(--muted); margin-top:4px; font-size:.92rem}
    .mobile-only{display:none}
    @media (max-width: 980px){
      .hero-grid,.rating,.footer-grid,.grid-4,.grid-3,.grid-2,.reviews,.gallery,.article-list,.flow,.service-list,.form-grid{grid-template-columns:1fr}
      .nav-toggle{display:inline-flex}
      .nav-links{
        display:none; width:100%; padding:12px; margin-top:12px; border:1px solid var(--line); border-radius:18px; background:#fff
      }
      .nav-links.open{display:flex; flex-direction:column; align-items:stretch}
      .nav{flex-wrap:wrap}
      .hero{padding-top:18px}
      .hero-shell{border-radius:24px}
      .hero-grid{padding:22px}
      .section-head{align-items:flex-start; flex-direction:column}
      .desktop-only{display:none}
      .mobile-only{display:block}
      .hero-mini{grid-template-columns:1fr}
    }
    @media (max-width: 640px){
      .container{width:min(100% - 24px, var(--container))}
      h1{font-size:2rem}
      .btn{width:100%}
      .hero-actions{flex-direction:column}
      .nav-links a{padding:10px 12px}
      .floating{right:12px; bottom:12px}
    }
    .reveal{opacity:0; transform:translateY(14px); transition:opacity .6s ease, transform .6s ease}
    .reveal.in{opacity:1; transform:none}