:root{
      --bg:#f7fbf7;
      --bg2:#ecf8f0;
      --card:#ffffff;
      --line:#d9e7dd;
      --text:#173026;
      --muted:#5f7268;
      --brand:#2ea97e;
      --brand2:#62c48f;
      --brand3:#dff6e9;
      --shadow:0 14px 40px rgba(28, 69, 49, .08);
      --radius:20px;
      --max: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;
      background:
        radial-gradient(circle at top left, rgba(98,196,143,.16), transparent 32%),
        radial-gradient(circle at 92% 8%, rgba(46,169,126,.10), transparent 26%),
        linear-gradient(180deg, var(--bg) 0%, #fbfefc 45%, #f7fbf7 100%);
      color:var(--text);
      line-height:1.6;
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(100% - 32px, var(--max));margin:0 auto}
    .topbar{
      position:sticky;top:0;z-index:60;
      backdrop-filter:saturate(160%) blur(12px);
      background:rgba(247,251,247,.84);
      border-bottom:1px solid rgba(217,231,221,.8);
    }
    .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;padding:4px;border:1px solid var(--line)}
    .brand-text{min-width:0}
    .brand-text strong{display:block;font-size:1rem}
    .brand-text span{display:block;color:var(--muted);font-size:.84rem}
    .nav-links{display:flex;align-items:center;gap:16px;flex-wrap:wrap;justify-content:flex-end}
    .nav-links a{font-size:.95rem;color:#294035;padding:8px 10px;border-radius:999px}
    .nav-links a:hover,.nav-links a:focus-visible{background:var(--brand3);color:#14523d;outline:none}
    .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:11px 16px;
      font-weight:700;transition:.22s ease;cursor:pointer;white-space:nowrap
    }
    .btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;box-shadow:0 12px 24px rgba(46,169,126,.18)}
    .btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 28px rgba(46,169,126,.22)}
    .btn-ghost{background:#fff;border-color:var(--line);color:var(--text)}
    .btn-ghost:hover{background:#f5fbf7;transform:translateY(-1px)}
    .menu-toggle{display:none}
    .hero{padding:42px 0 24px}
    .hero-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:22px;align-items:stretch}
    .hero-main,.hero-side,.panel,.card,.faq-item,.review,.article,.form-wrap,.table-wrap,.timeline,.network,.compare,.price-box{background:rgba(255,255,255,.86);border:1px solid rgba(217,231,221,.9);box-shadow:var(--shadow);border-radius:var(--radius)}
    .hero-main{padding:30px;position:relative;overflow:hidden}
    .hero-main:before,.hero-main:after{
      content:"";position:absolute;border-radius:50%;background:radial-gradient(circle, rgba(98,196,143,.22), transparent 68%);pointer-events:none
    }
    .hero-main:before{width:260px;height:260px;right:-80px;top:-70px}
    .hero-main:after{width:180px;height:180px;left:-70px;bottom:-50px}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;background:var(--brand3);color:#156045;padding:8px 12px;border-radius:999px;font-weight:700;font-size:.9rem}
    h1{margin:14px 0 12px;font-size:clamp(2rem,4vw,3.4rem);line-height:1.08;letter-spacing:-.02em}
    .lead{font-size:1.04rem;color:var(--muted);max-width:60ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin:22px 0 18px}
    .hero-stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}
    .stat{padding:14px;border-radius:16px;background:linear-gradient(180deg,#fff,#f5fbf7);border:1px solid var(--line)}
    .stat strong{display:block;font-size:1.1rem}
    .stat span{display:block;color:var(--muted);font-size:.88rem}
    .hero-side{padding:22px;display:grid;gap:16px}
    .side-note{padding:18px;border-radius:18px;background:linear-gradient(180deg,#f4fbf7,#fff);border:1px solid var(--line)}
    .side-note h3{margin:0 0 8px;font-size:1.08rem}
    .side-note p{margin:0;color:var(--muted)}
    .chip-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .chip{padding:8px 12px;border-radius:999px;background:#f6fcf8;border:1px solid var(--line);font-size:.9rem;color:#285544}
    section{padding:18px 0}
    .section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:14px;margin-bottom:16px}
    .section-head h2{margin:0;font-size:1.6rem}
    .section-head p{margin:0;color:var(--muted);max-width:65ch}
    .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{margin:0 0 10px;font-size:1.08rem}
    .card p,.panel p{margin:0;color:var(--muted)}
    .icon{
      width:44px;height:44px;border-radius:14px;display:grid;place-items:center;
      background:linear-gradient(135deg,#def6e8,#f5fffa);color:#15704e;font-weight:800;margin-bottom:14px
    }
    .kpi-row{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
    .kpi{padding:20px;border-radius:18px;background:linear-gradient(180deg,#ffffff,#f5fbf7);border:1px solid var(--line)}
    .kpi strong{display:block;font-size:2rem;line-height:1;margin-bottom:8px;color:#164c39}
    .kpi span{color:var(--muted)}
    .workflow,.timeline,.network,.compare,.price-box{padding:20px}
    .steps{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);position:relative}
    .step .num{display:inline-flex;width:34px;height:34px;border-radius:50%;align-items:center;justify-content:center;background:var(--brand3);color:#126246;font-weight:800;margin-bottom:10px}
    .compare table{width:100%;border-collapse:collapse;overflow:hidden}
    .compare th,.compare td{padding:14px 12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
    .compare th{background:#f1faf5}
    .compare tr:last-child td{border-bottom:none}
    .rating{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
    .stars{color:#f0b400;font-size:1.05rem;letter-spacing:1px}
    .accordion{display:grid;gap:12px}
    .faq-item{overflow:hidden}
    .faq-q{width:100%;border:none;background:transparent;color:var(--text);padding:18px 20px;display:flex;align-items:center;justify-content:space-between;gap:16px;font-size:1rem;font-weight:700;cursor:pointer}
    .faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease,padding .28s ease;color:var(--muted);padding:0 20px}
    .faq-item.open .faq-a{max-height:180px;padding:0 20px 18px}
    .faq-item.open .faq-q .arrow{transform:rotate(180deg)}
    .arrow{transition:transform .22s ease}
    .reviews .review{padding:18px}
    .review .meta{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:10px}
    .review .name{font-weight:800}
    .review .role{color:var(--muted);font-size:.92rem}
    .table-wrap{overflow:auto}
    .table-wrap table{width:100%;border-collapse:collapse;min-width:860px}
    .table-wrap th,.table-wrap td{padding:14px 12px;border-bottom:1px solid var(--line);text-align:left}
    .table-wrap th{background:#f1faf5;position:sticky;top:0}
    .articles{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .article{padding:18px}
    .article .tag{display:inline-flex;padding:6px 10px;border-radius:999px;background:var(--brand3);color:#16624a;font-size:.84rem;font-weight:700;margin-bottom:12px}
    .article a{display:inline-flex;margin-top:12px;color:#17624a;font-weight:700}
    .form-wrap{padding:22px}
    form{display:grid;gap:14px}
    .form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
    label{display:grid;gap:8px;font-weight:700;font-size:.95rem}
    input,select,textarea{
      width:100%;border:1px solid var(--line);border-radius:14px;background:#fff;color:var(--text);
      padding:13px 14px;font:inherit;outline:none;transition:border-color .2s ease,box-shadow .2s ease
    }
    input:focus,select:focus,textarea:focus{border-color:#74c9a0;box-shadow:0 0 0 4px rgba(98,196,143,.15)}
    textarea{min-height:118px;resize:vertical}
    .form-actions{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
    .muted{color:var(--muted)}
    .footer{
      margin-top:18px;padding:26px 0 32px;background:#edf7f0;border-top:1px solid var(--line);color:#244035
    }
    .footer a{color:#14573f}
    .footer-grid{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:18px}
    .footer h3{margin:0 0 12px;font-size:1.05rem}
    .footer ul{list-style:none;padding:0;margin:0;display:grid;gap:8px}
    .footer .small{color:#4f6459;font-size:.92rem}
    .float-tools{
      position:fixed;right:16px;bottom:16px;z-index:80;display:grid;gap:10px
    }
    .float-btn{
      width:48px;height:48px;border-radius:50%;display:grid;place-items:center;
      background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;box-shadow:0 10px 24px rgba(46,169,126,.24)
    }
    .sidebar-card{
      position:fixed;left:16px;bottom:16px;z-index:80;max-width:280px;display:none;
      background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);overflow:hidden
    }
    .sidebar-card.open{display:block}
    .sidebar-card header{display:flex;align-items:center;justify-content:space-between;padding:12px 14px;background:#f2faf5}
    .sidebar-card .content{padding:14px;display:grid;gap:10px}
    .sidebar-card .qrcode{width:180px;margin:0 auto;border-radius:14px}
    .section-anchor{scroll-margin-top:92px}
    .timeline-list{display:grid;gap:12px}
    .timeline-item{display:grid;grid-template-columns:120px 1fr;gap:14px;padding:14px 0;border-bottom:1px solid var(--line)}
    .timeline-item:last-child{border-bottom:none}
    .tag-list{display:flex;flex-wrap:wrap;gap:10px}
    .tag-list span{padding:9px 12px;border-radius:999px;background:#fff;border:1px solid var(--line)}
    .gallery{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
    .gallery img{border-radius:18px;border:1px solid var(--line);background:#fff;aspect-ratio:16/10;object-fit:cover}
    .split{display:grid;grid-template-columns:1fr 1fr;gap:16px}
    .panel{padding:20px}
    .mobile-only{display:none}
    .reveal{opacity:0;transform:translateY(12px);transition:opacity .55s ease,transform .55s ease}
    .reveal.in{opacity:1;transform:none}
    @media (max-width: 980px){
      .hero-grid,.grid-3,.grid-2,.kpi-row,.steps,.articles,.footer-grid,.gallery,.split,.hero-stats,.form-grid{grid-template-columns:1fr 1fr}
      .hero-grid{grid-template-columns:1fr}
      .footer-grid,.articles,.gallery,.split{grid-template-columns:1fr}
      .kpi-row,.steps,.hero-stats{grid-template-columns:1fr 1fr}
      .timeline-item{grid-template-columns:1fr}
      .nav-links{display:none}
      .menu-toggle{display:inline-flex}
      .nav.open .nav-links{
        display:flex;position:absolute;left:16px;right:16px;top:66px;flex-direction:column;
        background:#fff;border:1px solid var(--line);padding:12px;border-radius:18px;box-shadow:var(--shadow);align-items:flex-start
      }
      .nav.open{position:relative}
      .mobile-only{display:block}
    }
    @media (max-width: 640px){
      .container{width:min(100% - 20px, var(--max))}
      .hero-main,.hero-side,.card,.panel,.workflow,.timeline,.network,.compare,.price-box,.form-wrap{padding:18px}
      .hero-actions,.form-actions{flex-direction:column;align-items:stretch}
      .btn{width:100%}
      .hero-stats,.kpi-row,.steps{grid-template-columns:1fr}
      h1{font-size:2rem}
      .section-head{flex-direction:column;align-items:flex-start}
      .sidebar-card{left:10px;right:10px;max-width:none}
    }