:root{
      --bg:#f4faf7;
      --panel:#ffffff;
      --panel-2:#eef8f2;
      --text:#183126;
      --muted:#5f7569;
      --line:#d8e6dd;
      --green:#2bb673;
      --green-2:#1f9d60;
      --mint:#dff5ea;
      --mint-2:#c9f0db;
      --shadow:0 12px 30px rgba(24,49,38,.08);
      --shadow-2:0 18px 40px rgba(24,49,38,.12);
      --radius:20px;
      --max: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(43,182,115,.12), transparent 24%),
        radial-gradient(circle at top right, rgba(31,157,96,.10), transparent 28%),
        linear-gradient(180deg, #f8fcf9 0%, #f3faf5 100%);
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(var(--max), calc(100% - 32px)); margin:0 auto}
    .topbar{
      position:sticky;top:0;z-index:30;
      backdrop-filter:saturate(180%) blur(14px);
      background:rgba(244,250,247,.84);
      border-bottom:1px solid rgba(216,230,221,.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:10px;background:#fff;padding:4px;box-shadow:0 6px 18px rgba(24,49,38,.08)}
    .brand strong{display:block;font-size:18px;line-height:1.1}
    .brand span{display:block;font-size:12px;color:var(--muted);margin-top:3px}
    .navlinks{display:flex;align-items:center;gap:16px;flex-wrap:wrap;justify-content:flex-end}
    .navlinks a{font-size:14px;color:var(--muted);padding:8px 10px;border-radius:999px;transition:.2s}
    .navlinks a:hover,.navlinks a.active{background:var(--mint);color:var(--text)}
    .nav-actions{display:flex;align-items:center;gap:10px}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      border:1px solid transparent;border-radius:999px;padding:12px 18px;
      font-weight:700;font-size:14px;cursor:pointer;transition:.22s ease;
      white-space:nowrap;
    }
    .btn-primary{background:linear-gradient(135deg,var(--green),var(--green-2));color:#fff;box-shadow:0 10px 20px rgba(43,182,115,.22)}
    .btn-secondary{background:#fff;border-color:var(--line);color:var(--text)}
    .btn:hover{transform:translateY(-2px);box-shadow:var(--shadow)}
    .menu-btn{display:none;background:#fff;border:1px solid var(--line);width:44px;height:44px;border-radius:12px}
    .hero{padding:32px 0 18px}
    .hero-grid{
      display:grid;grid-template-columns:1.15fr .85fr;gap:22px;align-items:stretch;
    }
    .hero-main,.hero-side,.card,.panel,.quote,.step,.faq-item,.article,.review,.compare,.contact,.network{
      background:rgba(255,255,255,.88);
      border:1px solid rgba(216,230,221,.95);
      box-shadow:var(--shadow);
      border-radius:var(--radius);
    }
    .hero-main{padding:34px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;background:var(--mint);color:var(--green-2);padding:8px 12px;border-radius:999px;font-size:13px;font-weight:700}
    h1{margin:18px 0 14px;font-size:clamp(32px,5vw,56px);line-height:1.08;letter-spacing:-.03em}
    .lead{margin:0;color:var(--muted);font-size:16px;line-height:1.8;max-width:62ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
    .hero-points{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:26px}
    .point{padding:14px 16px;border-radius:16px;background:linear-gradient(180deg,#fff, #f3fbf6);border:1px solid var(--line)}
    .point b{display:block;font-size:20px}
    .point span{display:block;color:var(--muted);font-size:13px;margin-top:6px;line-height:1.5}
    .hero-side{padding:22px;background:linear-gradient(180deg,#ffffff 0%, #f3fbf6 100%)}
    .side-stat{display:grid;grid-template-columns:1fr 1fr;gap:12px}
    .stat{padding:16px;border-radius:18px;background:#fff;border:1px solid var(--line)}
    .stat strong{display:block;font-size:24px}
    .stat span{display:block;color:var(--muted);font-size:13px;margin-top:6px}
    .side-list{margin:18px 0 0;padding:0;list-style:none;display:grid;gap:10px}
    .side-list li{display:flex;gap:10px;align-items:flex-start;color:var(--text);line-height:1.7}
    .dot{width:10px;height:10px;border-radius:50%;background:linear-gradient(135deg,var(--green),var(--mint-2));margin-top:7px;flex:none}
    section{padding:18px 0}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:14px;margin-bottom:16px}
    .section-head h2{margin:0;font-size:28px;line-height:1.15}
    .section-head p{margin:0;color:var(--muted);max-width:70ch;line-height:1.7}
    .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .card{padding:20px}
    .card h3,.panel h3,.review h3,.article h3,.compare h3{margin:0 0 10px;font-size:18px}
    .card p,.panel p,.review p,.article p{margin:0;color:var(--muted);line-height:1.75}
    .icon{
      width:42px;height:42px;border-radius:14px;display:grid;place-items:center;
      background:linear-gradient(135deg,#e8fbf1,#d1f2e1);color:var(--green-2);font-weight:800;margin-bottom:14px
    }
    .tags{display:flex;flex-wrap:wrap;gap:10px}
    .tag{padding:9px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);color:var(--text);font-size:13px}
    .two-col{display:grid;grid-template-columns:1fr 1fr;gap:16px}
    .panel{padding:22px}
    .steps{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .step{padding:18px;position:relative;overflow:hidden}
    .step::after{content:attr(data-step);position:absolute;right:14px;top:10px;font-size:42px;font-weight:800;color:rgba(43,182,115,.10)}
    .step h3{margin-bottom:8px}
    .step p{font-size:14px}
    .compare-wrap{overflow:auto}
    table{width:100%;border-collapse:separate;border-spacing:0;min-width:860px}
    th,td{padding:16px 14px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
    th{background:#f0faf4;color:var(--text);font-size:14px}
    td{background:#fff;color:var(--text)}
    tr:last-child td{border-bottom:none}
    .badge{display:inline-flex;padding:7px 10px;border-radius:999px;background:var(--mint);color:var(--green-2);font-size:12px;font-weight:700}
    .review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .review{padding:20px}
    .review .meta{display:flex;justify-content:space-between;gap:10px;margin-bottom:12px;align-items:center}
    .stars{color:#f0b429;letter-spacing:2px;font-size:16px}
    .case-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:16px}
    .media-card{padding:18px;display:grid;gap:14px}
    .media-card img{width:100%;border-radius:18px;border:1px solid var(--line);background:#fff}
    .article-list{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .article{padding:20px}
    .article .meta{display:flex;justify-content:space-between;gap:8px;color:var(--muted);font-size:13px;margin-bottom:10px}
    .faq{display:grid;gap:12px}
    .faq-item{padding:0;overflow:hidden}
    .faq-q{
      width:100%;text-align:left;border:0;background:transparent;color:var(--text);
      padding:18px 20px;font-size:16px;font-weight:700;display:flex;justify-content:space-between;align-items:center;cursor:pointer
    }
    .faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease,padding .28s ease;border-top:1px solid transparent}
    .faq-item.open .faq-a{max-height:180px;padding:0 20px 18px;border-top-color:var(--line)}
    .faq-a p{margin:0;color:var(--muted);line-height:1.8}
    .contact-grid{display:grid;grid-template-columns:1fr .9fr;gap:16px}
    form{display:grid;gap:12px}
    .field{display:grid;gap:8px}
    label{font-size:14px;font-weight:700}
    input,select,textarea{
      width:100%;border:1px solid var(--line);border-radius:14px;padding:13px 14px;background:#fff;color:var(--text);
      font:inherit;outline:none;transition:.2s;
    }
    input:focus,select:focus,textarea:focus{border-color:rgba(43,182,115,.7);box-shadow:0 0 0 4px rgba(43,182,115,.10)}
    textarea{min-height:118px;resize:vertical}
    .contact-box{display:grid;gap:14px}
    .contact-list{display:grid;gap:10px}
    .contact-line{display:flex;justify-content:space-between;gap:12px;padding:12px 14px;border-radius:14px;background:#fff;border:1px solid var(--line)}
    .footer{
      margin-top:8px;padding:26px 0 34px;border-top:1px solid var(--line);background:rgba(255,255,255,.75)
    }
    .footer-grid{display:grid;grid-template-columns:1.3fr .9fr .8fr;gap:16px}
    .footer p,.footer a,.footer li{color:var(--muted);line-height:1.8}
    .footer h3{margin:0 0 12px}
    .footer-links{display:flex;flex-wrap:wrap;gap:10px}
    .footer-links a{padding:8px 10px;border-radius:999px;background:#fff;border:1px solid var(--line)}
    .floating{
      position:fixed;right:16px;bottom:16px;z-index:40;display:grid;gap:10px
    }
    .float-btn{
      width:52px;height:52px;border-radius:16px;display:grid;place-items:center;border:1px solid var(--line);
      background:#fff;box-shadow:var(--shadow);cursor:pointer;font-size:18px
    }
    .service{
      position:fixed;left:16px;bottom:16px;z-index:39;width:min(320px, calc(100vw - 32px));
      background:#fff;border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow-2);overflow:hidden
    }
    .service-head{padding:14px 16px;background:linear-gradient(135deg,#eafaf1,#f7fcf8);display:flex;justify-content:space-between;align-items:center;gap:12px}
    .service-body{padding:14px 16px;display:grid;gap:12px}
    .service .ai-page-image{border-radius:16px;border:1px solid var(--line)}
    .collapse{display:none}
    .mini{font-size:13px;color:var(--muted)}
    .mobile-only{display:none}
    @media (max-width: 980px){
      .hero-grid,.case-grid,.contact-grid,.footer-grid,.two-col{grid-template-columns:1fr}
      .grid-3,.grid-4,.review-grid,.article-list,.steps{grid-template-columns:1fr 1fr}
      .hero-points{grid-template-columns:1fr}
      .navlinks{display:none}
      .menu-btn{display:inline-grid;place-items:center}
      .mobile-only{display:block}
      .nav.open .navlinks{
        display:flex;position:absolute;left:0;right:0;top:100%;padding:12px 16px 16px;background:rgba(244,250,247,.98);
        border-bottom:1px solid var(--line);flex-direction:column;align-items:flex-start;gap:6px
      }
      .nav.open .nav-actions{margin-left:auto}
      .topbar{position:sticky}
    }
    @media (max-width: 640px){
      .container{width:min(var(--max), calc(100% - 22px))}
      .hero-main,.hero-side,.card,.panel,.review,.article,.faq-q,.faq-a,.contact,.media-card{padding-left:16px;padding-right:16px}
      .grid-3,.grid-4,.review-grid,.article-list,.steps{grid-template-columns:1fr}
      h1{font-size:30px}
      .section-head{flex-direction:column;align-items:flex-start}
      .service{display:none}
    }
    .reveal{opacity:0;transform:translateY(18px);transition:.55s ease}
    .reveal.show{opacity:1;transform:none}