:root{
      --bg:#f7f4ff;
      --bg2:#ffffff;
      --card:#ffffff;
      --text:#1f2430;
      --muted:#5f6472;
      --line:#e7e1fb;
      --pri:#7a3df0;
      --pri2:#a84cff;
      --pri3:#ff5bc8;
      --accent:#4d74ff;
      --shadow:0 18px 50px rgba(71, 32, 143, .10);
      --shadow2:0 10px 24px rgba(71, 32, 143, .12);
      --radius:22px;
      --radius2:16px;
      --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",Arial,sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(168,76,255,.16), transparent 28%),
        radial-gradient(circle at top right, rgba(77,116,255,.14), transparent 24%),
        linear-gradient(180deg, #fbf9ff 0%, #f5f1ff 45%, #f9fbff 100%);
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(var(--container), calc(100% - 32px)); margin:0 auto}
    .site-header{
      position:sticky; top:0; z-index:50;
      backdrop-filter: blur(18px);
      background:rgba(251,248,255,.82);
      border-bottom:1px solid rgba(231,225,251,.9);
    }
    .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:0 8px 20px rgba(122,61,240,.08)}
    .brand-text{display:flex;flex-direction:column;min-width:0}
    .brand-text strong{font-size:16px;line-height:1.1}
    .brand-text span{font-size:12px;color:var(--muted);margin-top:4px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
    .nav-links{display:flex; flex-wrap:wrap; gap:10px; align-items:center; justify-content:flex-end}
    .nav-links a, .nav-actions a, .btn, .chip{
      border:1px solid transparent;
      border-radius:999px;
      transition:.25s ease;
    }
    .nav-links a{
      padding:9px 13px; font-size:14px; color:var(--text);
    }
    .nav-links a:hover, .nav-links a:focus, .btn:hover, .nav-actions a:hover, .chip:hover{
      transform:translateY(-1px);
      box-shadow:var(--shadow2);
    }
    .nav-links a:hover{background:#fff;border-color:var(--line)}
    .nav-actions{display:flex; align-items:center; gap:10px}
    .nav-actions .home-link{
      padding:10px 14px; background:linear-gradient(135deg,var(--pri),var(--pri3)); color:#fff; font-weight:700;
      box-shadow:0 12px 26px rgba(122,61,240,.24);
    }
    .menu-toggle{
      display:none;
      border:1px solid var(--line); background:#fff; color:var(--text);
      padding:10px 12px; border-radius:14px; cursor:pointer;
    }
    .hero{
      padding:36px 0 18px;
    }
    .hero-grid{
      display:grid; grid-template-columns: 1.2fr .8fr; gap:20px; align-items:stretch;
    }
    .hero-main, .hero-side, .panel, .card, .faq-item, .review, .article, .form-wrap, .table-wrap, .compare-card{
      background:rgba(255,255,255,.92);
      border:1px solid rgba(231,225,251,.92);
      box-shadow:var(--shadow);
      border-radius:var(--radius);
    }
    .hero-main{padding:28px}
    .eyebrow{
      display:inline-flex; align-items:center; gap:8px; padding:8px 12px; border-radius:999px;
      color:#6d34d3; background:rgba(122,61,240,.08); border:1px solid rgba(122,61,240,.12);
      font-size:13px; font-weight:700;
    }
    h1{font-size:clamp(30px, 5vw, 52px); line-height:1.08; margin:16px 0 14px}
    .lead{font-size:16px; line-height:1.8; color:var(--muted); max-width:62ch; margin:0}
    .hero-ctas{display:flex; flex-wrap:wrap; gap:12px; margin-top:22px}
    .btn{
      display:inline-flex; align-items:center; justify-content:center; gap:8px;
      padding:13px 18px; font-weight:700;
      cursor:pointer; border:none;
    }
    .btn.primary{background:linear-gradient(135deg,var(--pri),var(--pri3)); color:#fff; box-shadow:0 16px 30px rgba(122,61,240,.24)}
    .btn.secondary{background:#fff;color:var(--text); border-color:var(--line)}
    .hero-tags{display:flex; flex-wrap:wrap; gap:10px; margin-top:18px}
    .chip{padding:9px 12px; font-size:13px; background:#fff; border-color:var(--line); color:var(--text)}
    .hero-side{padding:22px; position:relative; overflow:hidden}
    .hero-side::before{
      content:""; position:absolute; inset:-40% -20% auto auto; width:220px; height:220px;
      background:radial-gradient(circle, rgba(255,91,200,.18), transparent 62%);
      pointer-events:none;
    }
    .metrics{display:grid; grid-template-columns:repeat(2,1fr); gap:12px; position:relative; z-index:1}
    .metric{
      padding:16px; border-radius:18px; background:linear-gradient(180deg,#fff 0%, #faf8ff 100%);
      border:1px solid var(--line);
    }
    .metric b{display:block; font-size:24px; margin-bottom:6px; color:#29164f}
    .metric span{font-size:13px; color:var(--muted); line-height:1.5}
    .section{padding:18px 0}
    .section-head{display:flex; align-items:end; justify-content:space-between; gap:14px; margin-bottom:14px}
    .section-head h2{margin:0; font-size:clamp(22px, 3vw, 34px)}
    .section-head p{margin:0; color:var(--muted); line-height:1.7; max-width:70ch}
    .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{padding:20px}
    .card h3{margin:10px 0 10px; font-size:18px}
    .card p, .card li, .review p, .article p, .faq-item p{color:var(--muted); line-height:1.8}
    .icon{
      width:42px; height:42px; border-radius:14px; display:grid; place-items:center;
      background:linear-gradient(135deg, rgba(122,61,240,.14), rgba(255,91,200,.14)); color:#6c2fe0; font-weight:800;
    }
    .timeline{display:grid; gap:12px}
    .step{
      display:grid; grid-template-columns:52px 1fr; gap:14px; padding:18px; border-radius:18px; background:#fff; border:1px solid var(--line)
    }
    .step-num{
      width:52px;height:52px;border-radius:16px;display:grid;place-items:center;
      background:linear-gradient(135deg,var(--pri),var(--pri3)); color:#fff; font-weight:800; box-shadow:0 12px 24px rgba(122,61,240,.22)
    }
    .step h3{margin:0 0 6px}
    .table-wrap{overflow:auto}
    table{width:100%; border-collapse:collapse; min-width:820px; background:#fff}
    th,td{padding:14px 12px; border-bottom:1px solid var(--line); text-align:left; vertical-align:top}
    th{background:#faf7ff; color:#3b255f; font-size:14px}
    td{color:var(--muted); line-height:1.7}
    .badge{display:inline-flex; align-items:center; gap:6px; padding:6px 10px; border-radius:999px; background:rgba(77,116,255,.08); color:#3553d9; font-size:12px; font-weight:700}
    .compare-card{padding:20px}
    .stars{color:#f0a800; letter-spacing:2px; font-size:18px}
    .score{font-size:42px; font-weight:800; color:#1d2450; line-height:1}
    .split{
      display:grid; grid-template-columns:1fr 1fr; gap:16px;
    }
    .tag-cloud{display:flex; flex-wrap:wrap; gap:10px}
    .tag-cloud span{padding:10px 12px; background:#fff; border:1px solid var(--line); border-radius:14px; color:#42335f; font-size:13px}
    .reviews{display:grid; grid-template-columns:repeat(3,1fr); gap:16px}
    .review{padding:18px}
    .review .meta{display:flex; align-items:center; justify-content:space-between; gap:10px; margin-bottom:10px}
    .review .role{font-weight:700; color:#2a2452}
    .article-list{display:grid; grid-template-columns:repeat(3,1fr); gap:16px}
    .article{padding:18px}
    .article .time{font-size:12px; color:#7a6f95; margin-bottom:8px}
    .form-wrap{padding:20px}
    form{display:grid; gap:14px}
    .fields{display:grid; grid-template-columns:repeat(2,1fr); gap:14px}
    label{display:grid; gap:8px; font-size:14px; color:#34264f; font-weight:700}
    input, select, textarea{
      width:100%; border:1px solid var(--line); background:#fff; color:var(--text);
      padding:13px 14px; border-radius:14px; outline:none; font:inherit;
    }
    input:focus,select:focus,textarea:focus{border-color:rgba(122,61,240,.5); box-shadow:0 0 0 4px rgba(122,61,240,.08)}
    textarea{min-height:120px; resize:vertical}
    .form-note{color:var(--muted); font-size:13px; line-height:1.7}
    .faq-list{display:grid; gap:12px}
    .faq-item{overflow:hidden}
    .faq-q{
      width:100%; text-align:left; background:transparent; border:0; padding:18px 20px; cursor:pointer; color:var(--text);
      display:flex; justify-content:space-between; align-items:center; gap:14px; font:inherit; font-weight:700;
    }
    .faq-a{max-height:0; overflow:hidden; transition:max-height .28s ease; padding:0 20px}
    .faq-item.open .faq-a{padding-bottom:18px}
    .faq-item.open .faq-icon{transform:rotate(45deg)}
    .faq-icon{transition:transform .25s ease; color:#7a3df0; font-size:22px; line-height:1}
    .footer{
      margin-top:18px; background:#1f1734; color:#f7f3ff; padding:28px 0 18px;
    }
    .footer .container{display:grid; gap:18px}
    .footer a{color:#efe8ff}
    .footer-grid{display:grid; grid-template-columns:1.2fr .8fr 1fr; gap:18px; align-items:start}
    .footer small{color:#cfc4ea; line-height:1.8}
    .floating{
      position:fixed; right:16px; bottom:16px; z-index:60; display:grid; gap:10px;
    }
    .floating a, .floating button{
      width:50px; height:50px; border-radius:16px; border:none; cursor:pointer;
      display:grid; place-items:center; background:linear-gradient(135deg,var(--pri),var(--pri3)); color:#fff; box-shadow:0 14px 30px rgba(122,61,240,.24)
    }
    .qr{
      position:fixed; left:16px; bottom:16px; z-index:60; width:72px; height:72px; border-radius:18px; overflow:hidden;
      border:1px solid var(--line); box-shadow:var(--shadow); background:#fff;
    }
    .qr img{width:100%; height:100%; object-fit:cover}
    .side-note{
      margin-top:14px; padding:14px 16px; border-radius:18px; background:rgba(122,61,240,.06); border:1px solid rgba(122,61,240,.12); color:#4b3470; line-height:1.8
    }
    .mobile-only{display:none}
    .hero-visual{
      margin-top:18px;
      display:grid;
      grid-template-columns:repeat(3,1fr);
      gap:10px;
    }
    .mini{
      padding:14px; border-radius:18px; background:linear-gradient(180deg,#fff, #faf7ff); border:1px solid var(--line);
    }
    .mini strong{display:block; font-size:15px; margin-bottom:6px}
    .mini span{display:block; font-size:13px; color:var(--muted); line-height:1.6}
    .anchor-title{scroll-margin-top:90px}
    .highlight{
      color:#4d2bd8; font-weight:800;
    }
    @media (max-width: 980px){
      .hero-grid,.grid-3,.reviews,.article-list,.footer-grid,.split{grid-template-columns:1fr}
      .grid-2,.fields{grid-template-columns:1fr}
      .nav{flex-wrap:wrap}
      .nav-links{display:none; width:100%; justify-content:flex-start; padding-top:10px}
      .nav-links.show{display:flex}
      .menu-toggle{display:inline-flex}
      .nav-actions{margin-left:auto}
      .hero-side{order:-1}
      .hero-visual{grid-template-columns:1fr}
      .mobile-only{display:block}
    }