:root{
      --bg:#f6f8fc;
      --bg2:#eef4ff;
      --card:#ffffff;
      --ink:#162033;
      --muted:#5d6b82;
      --line:#dbe4f3;
      --primary:#2f6bff;
      --primary2:#7f4dff;
      --accent:#19c2a5;
      --warm:#ffb14a;
      --shadow:0 18px 50px rgba(27, 44, 90, .10);
      --radius:22px;
      --radius-sm: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(--ink);
      background:
        radial-gradient(circle at top left, rgba(47,107,255,.10), transparent 28%),
        radial-gradient(circle at 85% 10%, rgba(25,194,165,.10), transparent 24%),
        linear-gradient(180deg, #fbfcff 0%, var(--bg) 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:30;
      backdrop-filter:saturate(140%) blur(12px);
      background:rgba(246,248,252,.82);
      border-bottom:1px solid rgba(219,228,243,.7);
    }
    .nav{
      display:flex;align-items:center;justify-content:space-between;gap:16px;
      min-height:72px;padding:10px 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 24px rgba(47,107,255,.14)}
    .brand-text{min-width:0}
    .brand-text strong{display:block;font-size:17px;line-height:1.1}
    .brand-text span{display:block;font-size:12px;color:var(--muted);margin-top:4px}
    .nav-toggle{
      display:none;border:1px solid var(--line);background:#fff;color:var(--ink);
      border-radius:12px;padding:10px 12px;font-size:14px
    }
    .nav-links{display:flex;align-items:center;gap:16px;flex-wrap:wrap;justify-content:flex-end}
    .nav-links a{font-size:14px;color:var(--ink);padding:8px 10px;border-radius:10px}
    .nav-links a:hover{background:#edf3ff;color:var(--primary)}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      border:1px solid transparent;border-radius:999px;padding:12px 18px;
      font-weight:600;transition:.22s ease;cursor:pointer;white-space:nowrap;
    }
    .btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary2));color:#fff;box-shadow:0 12px 28px rgba(47,107,255,.24)}
    .btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 34px rgba(47,107,255,.28)}
    .btn-ghost{background:#fff;border-color:var(--line);color:var(--ink)}
    .btn-ghost:hover{border-color:#b9c7e5;transform:translateY(-1px)}
    main{overflow:hidden}
    .hero{
      padding:34px 0 22px;
      position:relative;
    }
    .hero-grid{
      display:grid;grid-template-columns:1.15fr .85fr;gap:24px;align-items:stretch;
    }
    .hero-copy,.hero-panel,.section-card,.mini-card,.review-card,.info-card,.article-card,.faq-item,.form-card,.price-card,.compare-card,.case-card{
      background:rgba(255,255,255,.92);border:1px solid rgba(219,228,243,.9);
      box-shadow:var(--shadow);border-radius:var(--radius)
    }
    .hero-copy{padding:34px;position:relative;overflow:hidden}
    .hero-copy:before,.hero-panel:before{
      content:"";position:absolute;inset:auto -18px -18px auto;width:180px;height:180px;border-radius:50%;
      background:radial-gradient(circle, rgba(47,107,255,.18), transparent 65%);
      pointer-events:none
    }
    .eyebrow{
      display:inline-flex;align-items:center;gap:8px;
      background:linear-gradient(135deg, rgba(47,107,255,.10), rgba(127,77,255,.10));
      color:var(--primary);border:1px solid rgba(47,107,255,.14);
      border-radius:999px;padding:8px 12px;font-size:13px;font-weight:600;
    }
    h1{font-size:clamp(30px, 4vw, 54px);line-height:1.06;margin:16px 0 14px;letter-spacing:-.02em}
    .lead{font-size:16px;line-height:1.8;color:var(--muted);max-width:56ch;margin:0}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
    .hero-bullets{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:26px}
    .bullet{
      padding:14px 14px 13px;border-radius:18px;background:linear-gradient(180deg,#fff, #f6f9ff);
      border:1px solid var(--line)
    }
    .bullet b{display:block;font-size:15px;margin-bottom:6px}
    .bullet span{display:block;font-size:13px;line-height:1.65;color:var(--muted)}
    .hero-panel{padding:22px;display:grid;gap:14px;align-content:start}
    .stats{
      display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px
    }
    .stat{padding:16px;border-radius:18px;background:linear-gradient(180deg,#ffffff 0%, #f4f8ff 100%);border:1px solid var(--line)}
    .stat strong{display:block;font-size:26px;line-height:1.1;margin-bottom:6px}
    .stat span{font-size:13px;color:var(--muted);line-height:1.5}
    .hero-tags{display:flex;flex-wrap:wrap;gap:10px}
    .tag{padding:8px 10px;border-radius:999px;background:#eef4ff;border:1px solid #d8e4ff;font-size:13px;color:#224}
    .section{padding:18px 0}
    .section-header{display:flex;justify-content:space-between;align-items:end;gap:18px;margin-bottom:16px}
    .section-header h2{margin:0;font-size:clamp(22px, 2.5vw, 32px)}
    .section-header p{margin:0;color:var(--muted);line-height:1.7;max-width:68ch}
    .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}
    .section-card{padding:22px}
    .icon{
      width:44px;height:44px;border-radius:14px;display:grid;place-items:center;
      background:linear-gradient(135deg, rgba(47,107,255,.12), rgba(25,194,165,.12));color:var(--primary);
      margin-bottom:14px;font-weight:800
    }
    .section-card h3,.mini-card h3,.review-card h3,.case-card h3,.article-card h3,.faq-item summary,.price-card h3{margin:0 0 10px;font-size:18px}
    .section-card p,.mini-card p,.review-card p,.case-card p,.article-card p,.price-card p{margin:0;color:var(--muted);line-height:1.75}
    .mini-card{padding:18px}
    .mini-card ul{margin:12px 0 0;padding-left:18px;color:var(--muted);line-height:1.75}
    .timeline{display:grid;gap:12px}
    .step{display:grid;grid-template-columns:auto 1fr;gap:14px;align-items:start;padding:18px;background:#fff;border:1px solid var(--line);border-radius:18px}
    .step-num{
      width:34px;height:34px;border-radius:50%;display:grid;place-items:center;color:#fff;font-weight:700;
      background:linear-gradient(135deg,var(--primary),var(--primary2))
    }
    .table-wrap{overflow-x:auto;border-radius:20px;border:1px solid var(--line);background:#fff;box-shadow:var(--shadow)}
    table{width:100%;border-collapse:collapse;min-width:880px}
    th,td{padding:16px 14px;border-bottom:1px solid #edf1f8;text-align:left;vertical-align:top;font-size:14px;line-height:1.7}
    th{background:#f5f8ff;color:#1b2740}
    .badge{display:inline-flex;align-items:center;padding:6px 10px;border-radius:999px;font-size:12px;background:#eef8ff;color:#146; border:1px solid #d7ecff}
    .faq-list{display:grid;gap:12px}
    .faq-item{padding:0;overflow:hidden}
    .faq-item summary{list-style:none;padding:18px 20px;cursor:pointer;position:relative}
    .faq-item summary::-webkit-details-marker{display:none}
    .faq-item summary:after{
      content:"＋";position:absolute;right:20px;top:18px;color:var(--primary);font-weight:700
    }
    .faq-item[open] summary:after{content:"－"}
    .faq-body{padding:0 20px 18px;color:var(--muted);line-height:1.8}
    .quotes{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .review-card{padding:20px}
    .stars{color:#ffb400;letter-spacing:2px;font-size:15px;margin-bottom:10px}
    .review-meta{margin-top:14px;color:#41506b;font-size:13px;font-weight:600}
    .article-list{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .article-card{padding:18px}
    .article-card a{display:inline-flex;margin-top:12px;color:var(--primary);font-weight:600}
    .form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
    .form-card{padding:22px}
    .field{display:grid;gap:8px}
    .field label{font-size:14px;font-weight:600;color:#23324d}
    .field input,.field select,.field textarea{
      width:100%;border:1px solid #dbe4f3;background:#fff;border-radius:14px;padding:13px 14px;
      font:inherit;color:var(--ink);outline:none;transition:.2s ease
    }
    .field input:focus,.field select:focus,.field textarea:focus{border-color:#94b0ff;box-shadow:0 0 0 4px rgba(47,107,255,.10)}
    .field textarea{min-height:130px;resize:vertical}
    .full{grid-column:1/-1}
    .contact-strip{
      display:grid;grid-template-columns:1.05fr .95fr;gap:16px
    }
    .contact-box{padding:22px;background:#fff;border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow)}
    .contact-list{display:grid;gap:10px;margin-top:14px}
    .contact-item{display:flex;justify-content:space-between;gap:12px;padding:12px 14px;border-radius:14px;background:#f7faff;border:1px solid #e4ebf7}
    .footer{
      margin-top:18px;padding:22px 0 34px;background:#f3f7fd;border-top:1px solid #dbe4f3;color:var(--ink)
    }
    .footer a{color:#1f57d6}
    .footer-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:18px;align-items:start}
    .footer small{color:var(--muted);line-height:1.7}
    .links-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .links-cloud a,.social-chip{
      display:inline-flex;align-items:center;padding:8px 11px;border-radius:999px;background:#fff;border:1px solid var(--line);font-size:13px
    }
    .floating{
      position:fixed;right:16px;bottom:16px;z-index:40;display:grid;gap:10px
    }
    .floating a,.floating button{
      width:48px;height:48px;border-radius:50%;display:grid;place-items:center;border:none;cursor:pointer;
      background:linear-gradient(135deg,var(--primary),var(--primary2));color:#fff;box-shadow:0 14px 28px rgba(47,107,255,.25)
    }
    .floating .service{
      width:auto;height:auto;border-radius:999px;padding:12px 16px;font-weight:700
    }
    .float-card{
      position:fixed;right:16px;bottom:74px;z-index:41;display:none;width:min(340px, calc(100vw - 32px));
      background:#fff;border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow);padding:16px
    }
    .float-card.show{display:block}
    .float-card img{border-radius:16px;border:1px solid var(--line)}
    .float-card h3{margin:0 0 8px}
    .float-card p{margin:8px 0 0;color:var(--muted);line-height:1.7;font-size:14px}
    .reveal{opacity:0;transform:translateY(16px);transition:.55s ease}
    .reveal.visible{opacity:1;transform:none}
    .article-meta,.muted{color:var(--muted);font-size:13px;line-height:1.7}
    .compare-card{padding:22px}
    .price-card{padding:18px}
    .price-value{font-size:30px;font-weight:800;margin:8px 0 10px}
    .center{display:flex;justify-content:center}
    .note{font-size:12px;color:var(--muted);line-height:1.7}
    @media (max-width: 980px){
      .hero-grid,.grid-4,.grid-3,.quotes,.article-list,.footer-grid,.contact-strip{grid-template-columns:1fr}
      .form-grid{grid-template-columns:1fr}
      .hero-bullets{grid-template-columns:1fr}
      .nav-toggle{display:inline-flex}
      .nav-links{
        display:none;position:absolute;left:16px;right:16px;top:76px;background:#fff;border:1px solid var(--line);
        border-radius:18px;padding:12px;box-shadow:var(--shadow)
      }
      .nav-links.open{display:flex;flex-direction:column;align-items:stretch}
      .nav-links a{padding:12px 12px}
    }