:root{
      --bg:#f7f8fc;
      --bg2:#eef3ff;
      --card:#ffffff;
      --text:#132033;
      --muted:#5c6b80;
      --line:#dce4f2;
      --brand:#5b6cff;
      --brand2:#00c2ff;
      --accent:#7a4dff;
      --good:#16a085;
      --shadow:0 16px 40px rgba(35,52,90,.10);
      --shadow2:0 10px 28px rgba(91,108,255,.16);
      --radius:22px;
      --radius2:16px;
      --container:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:system-ui,-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(91,108,255,.12), transparent 28%),
        radial-gradient(circle at top right, rgba(0,194,255,.10), transparent 24%),
        linear-gradient(180deg, #fff 0%, var(--bg) 18%, #f6f8ff 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(255,255,255,.78);
      border-bottom:1px solid rgba(220,228,242,.8);
    }
    .nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:74px}
    .brand{display:flex;align-items:center;gap:12px;font-weight:800}
    .brand .ai-page-logo{width:44px;height:44px;object-fit:contain;border-radius:12px;background:#fff;box-shadow:0 8px 24px rgba(91,108,255,.12)}
    .brand-text{display:flex;flex-direction:column;line-height:1.15}
    .brand-text strong{font-size:15px;letter-spacing:.4px}
    .brand-text span{font-size:12px;color:var(--muted);font-weight:600}
    .nav-toggle{
      display:none;border:1px solid var(--line);background:#fff;color:var(--text);
      border-radius:12px;padding:10px 12px;cursor:pointer
    }
    .nav{
      display:flex;align-items:center;gap:14px;flex-wrap:wrap;justify-content:flex-end
    }
    .nav a{
      font-size:13px;font-weight:700;color:#2b3950;padding:8px 10px;border-radius:999px;
      transition:.2s ease
    }
    .nav a:hover,.nav a.active{background:linear-gradient(90deg, rgba(91,108,255,.12), rgba(0,194,255,.12));color:#18253b}
    .cta-row{display:flex;gap:10px;align-items:center}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      padding:12px 18px;border-radius:14px;border:1px solid transparent;
      font-weight:800;cursor:pointer;transition:.22s ease;white-space:nowrap
    }
    .btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;box-shadow:var(--shadow2)}
    .btn-primary:hover{transform:translateY(-2px);box-shadow:0 18px 38px rgba(91,108,255,.24)}
    .btn-ghost{background:#fff;border-color:var(--line);color:var(--text)}
    .btn-ghost:hover{transform:translateY(-2px);border-color:#b9c7f4}
    .hero{
      padding:34px 0 22px;
    }
    .hero-grid{
      display:grid;grid-template-columns:1.15fr .85fr;gap:22px;align-items:stretch;
    }
    .hero-main,.hero-side,.panel,.card,.faq-item,.review,.article,.price-card,.form-card,.timeline-card,.compare-card{
      background:rgba(255,255,255,.86);border:1px solid rgba(220,228,242,.95);
      box-shadow:var(--shadow);border-radius:var(--radius)
    }
    .hero-main{padding:28px;position:relative;overflow:hidden}
    .hero-main:before,.hero-main:after{
      content:"";position:absolute;border-radius:50%;filter:blur(2px);pointer-events:none
    }
    .hero-main:before{width:220px;height:220px;background:rgba(91,108,255,.10);right:-70px;top:-60px}
    .hero-main:after{width:160px;height:160px;background:rgba(0,194,255,.10);right:55px;bottom:-70px}
    .kicker{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;background:linear-gradient(90deg,rgba(91,108,255,.12),rgba(0,194,255,.12));color:#28406a;font-size:13px;font-weight:800}
    h1{margin:16px 0 14px;font-size:clamp(30px,5vw,54px);line-height:1.08;letter-spacing:-.5px}
    .lead{margin:0;color:var(--muted);font-size:16px;line-height:1.8;max-width:60ch}
    .hero-points{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:22px 0}
    .hero-point{
      padding:14px 14px;border-radius:16px;background:linear-gradient(180deg,#fff, #f7f9ff);border:1px solid var(--line)
    }
    .hero-point strong{display:block;font-size:15px;margin-bottom:4px}
    .hero-point span{font-size:13px;color:var(--muted);line-height:1.6}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:18px}
    .hero-side{padding:22px;display:grid;gap:14px;align-content:start}
    .mini-stat{
      padding:16px;border-radius:18px;background:linear-gradient(135deg, rgba(91,108,255,.08), rgba(0,194,255,.07));border:1px solid rgba(91,108,255,.12)
    }
    .mini-stat strong{display:block;font-size:28px;line-height:1;color:#20304b}
    .mini-stat span{font-size:13px;color:var(--muted)}
    .strip{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;margin:20px 0 36px}
    .strip .item{padding:18px;border-radius:18px;background:rgba(255,255,255,.82);border:1px solid var(--line);box-shadow:0 10px 26px rgba(18,32,51,.06)}
    .strip .item strong{display:block;font-size:20px;margin-bottom:6px}
    .strip .item span{color:var(--muted);font-size:13px;line-height:1.5}
    section{padding:18px 0}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:18px;margin-bottom:16px}
    .section-head h2{margin:0;font-size:28px}
    .section-head p{margin:0;color:var(--muted);max-width:70ch;line-height:1.7}
    .grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
    .card{padding:20px}
    .card h3,.panel h3,.price-card h3,.form-card h3,.compare-card h3,.timeline-card h3{margin:0 0 10px;font-size:19px}
    .card p,.panel p,.article p,.review p{margin:0;color:var(--muted);line-height:1.75}
    .icon-badge{
      width:44px;height:44px;border-radius:14px;display:grid;place-items:center;margin-bottom:14px;
      background:linear-gradient(135deg, rgba(91,108,255,.16), rgba(0,194,255,.12));color:#28406a;font-weight:900
    }
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag{padding:9px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);color:#31425f;font-size:13px;font-weight:700}
    .panel{padding:22px}
    .panel ul{margin:0;padding-left:18px;color:var(--muted);line-height:1.8}
    .media-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
    .media-grid img,.case-img{
      width:100%;height:auto;border-radius:18px;border:1px solid var(--line);box-shadow:0 14px 32px rgba(35,52,90,.08)
    }
    .process{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
    .step{padding:18px;border-radius:18px;background:#fff;border:1px solid var(--line)}
    .step b{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:12px;background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;margin-bottom:12px}
    .step h3{margin:0 0 8px;font-size:17px}
    .compare-card{padding:20px;overflow:hidden}
    .table-wrap{overflow:auto;border-radius:16px;border:1px solid var(--line);background:#fff}
    table{width:100%;border-collapse:collapse;min-width:760px}
    th,td{padding:14px 12px;border-bottom:1px solid #edf1f7;text-align:left;font-size:14px;vertical-align:top}
    th{background:#f7f9ff;color:#20304b;font-size:13px;text-transform:none}
    td{color:#334158}
    .rating{color:#f39c12;font-weight:900}
    .badge{
      display:inline-flex;align-items:center;padding:7px 10px;border-radius:999px;font-size:12px;font-weight:800;
      background:rgba(91,108,255,.12);color:#2b3d66
    }
    .timeline{display:grid;gap:14px}
    .timeline-item{display:grid;grid-template-columns:90px 1fr;gap:14px;padding:16px;border-radius:18px;background:#fff;border:1px solid var(--line)}
    .timeline-item .time{font-weight:900;color:#4b5d81}
    .reviews{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .review{padding:18px}
    .review .meta{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:10px}
    .review .role{font-size:13px;color:var(--muted)}
    .stars{color:#f39c12;font-weight:900;letter-spacing:1px}
    .articles{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .article{padding:18px}
    .article .date{font-size:12px;color:#6c7c97;margin-bottom:8px}
    .price-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .price-card{padding:20px}
    .price{font-size:28px;font-weight:900;color:#21304d;margin:14px 0 8px}
    .price-card ul{margin:0;padding-left:18px;color:var(--muted);line-height:1.8}
    .faq{display:grid;gap:12px}
    .faq-item{overflow:hidden}
    .faq-q{
      width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
      padding:18px 20px;background:transparent;border:0;color:var(--text);font-size:16px;font-weight:800;cursor:pointer;text-align:left
    }
    .faq-q span{color:var(--brand);font-size:22px;line-height:1}
    .faq-a{max-height:0;overflow:hidden;transition:max-height .26s ease,padding .26s ease;border-top:1px solid transparent}
    .faq-item.open .faq-a{max-height:180px;padding:0 20px 18px;color:var(--muted);line-height:1.8;border-top-color:var(--line)}
    .faq-item.open .faq-q span{transform:rotate(45deg)}
    .form-card{padding:22px}
    .form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
    .field{display:flex;flex-direction:column;gap:8px}
    label{font-size:13px;font-weight:800;color:#31425f}
    input,select,textarea{
      width:100%;padding:13px 14px;border-radius:14px;border:1px solid var(--line);background:#fff;color:var(--text);
      font:inherit;outline:none;transition:.2s ease
    }
    input:focus,select:focus,textarea:focus{border-color:#9fb4f7;box-shadow:0 0 0 4px rgba(91,108,255,.10)}
    textarea{min-height:120px;resize:vertical}
    .full{grid-column:1 / -1}
    .footer{
      margin-top:20px;padding:24px 0 28px;background:#0f1730;color:#dfe8ff
    }
    .footer a{color:#b9d4ff}
    .footer-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:18px;align-items:start}
    .footer .brand-text span,.footer p,.footer li{color:#b8c4e2}
    .footer .tag,.footer .btn-ghost{background:rgba(255,255,255,.04);border-color:rgba(255,255,255,.08);color:#edf4ff}
    .footer ul{margin:0;padding-left:18px;line-height:1.9}
    .fixed-tools{
      position:fixed;right:16px;bottom:16px;z-index:60;display:grid;gap:10px
    }
    .tool{
      width:48px;height:48px;border-radius:16px;display:grid;place-items:center;background:linear-gradient(135deg,var(--brand),var(--brand2));
      color:#fff;box-shadow:0 14px 30px rgba(91,108,255,.28);cursor:pointer;border:0
    }
    .tool.secondary{background:#fff;color:#20304b;border:1px solid var(--line)}
    .reveal{opacity:0;transform:translateY(16px);transition:.5s ease}
    .reveal.show{opacity:1;transform:none}
    .subtle-note{font-size:13px;color:var(--muted);line-height:1.7}
    .home-link{font-weight:900;color:#20304b}
    .service-network{display:flex;flex-wrap:wrap;gap:12px}
    .floating-kefu{
      position:fixed;left:16px;bottom:16px;z-index:60;display:grid;gap:10px;max-width:170px
    }
    .kefu-card{background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);padding:12px;text-align:center}
    .kefu-card img{width:100%;border-radius:14px;border:1px solid var(--line);margin-top:8px}
    .kefu-card strong{display:block;font-size:13px;margin-bottom:4px}
    @media (max-width: 980px){
      .hero-grid,.grid-3,.grid-2,.reviews,.articles,.price-grid,.footer-grid,.grid-3,.process,.strip,.hero-points,.media-grid{grid-template-columns:1fr 1fr}
      .process,.reviews,.articles,.price-grid,.footer-grid{grid-template-columns:1fr}
      .hero-grid{grid-template-columns:1fr}
      .section-head{align-items:flex-start;flex-direction:column}
      .timeline-item{grid-template-columns:1fr}
    }
    @media (max-width: 720px){
      .nav-toggle{display:inline-flex}
      .nav{display:none;position:absolute;left:16px;right:16px;top:74px;padding:14px;background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}
      .nav.open{display:flex}
      .nav a{padding:12px 14px}
      .cta-row{display:none}
      .hero{padding-top:18px}
      .hero-main,.hero-side,.card,.panel,.compare-card,.price-card,.review,.article,.form-card,.timeline-card{padding:18px}
      .hero-points,.form-grid,.strip,.media-grid,.grid-2,.grid-3{grid-template-columns:1fr}
      .floating-kefu{max-width:132px}
      h1{font-size:32px}
    }