:root{
      --bg:#f5fbf8;
      --bg2:#ecf7f2;
      --card:#ffffff;
      --line:#d9e9e2;
      --text:#17302a;
      --muted:#5d7570;
      --brand:#1f9d79;
      --brand2:#68c8a2;
      --accent:#e8fff5;
      --shadow:0 18px 40px rgba(25, 78, 62, .10);
      --shadow2:0 10px 26px rgba(25, 78, 62, .08);
      --radius:22px;
      --radius2:16px;
      --container:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC","Hiragino Sans GB","Microsoft YaHei", "Segoe UI", sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(104,200,162,.18), transparent 28%),
        radial-gradient(circle at top right, rgba(31,157,121,.10), transparent 24%),
        linear-gradient(180deg, #f8fffc 0%, var(--bg) 35%, #f7fbf9 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(14px);
      background: rgba(245,251,248,.78);
      border-bottom:1px solid rgba(217,233,226,.7);
    }
    .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 .word{
      display:flex;
      flex-direction:column;
      line-height:1.15;
    }
    .brand .word strong{font-size:18px;letter-spacing:.4px}
    .brand .word span{font-size:12px;color:var(--muted)}
    .ai-page-logo{
      width:42px;
      height:42px;
      object-fit:contain;
      border-radius:12px;
      background:#fff;
      padding:4px;
      box-shadow:0 6px 18px rgba(31,157,121,.12);
    }
    .menu-toggle{
      display:none;
      border:1px solid var(--line);
      background:#fff;
      color:var(--text);
      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:#35524b;
      padding:8px 10px;
      border-radius:999px;
      transition:.25s ease;
    }
    .nav-links a:hover,.nav-links a:focus-visible{
      background:#e9faf3;
      color:var(--brand);
      outline:none;
    }
    .home-btn{
      padding:10px 16px !important;
      background:linear-gradient(135deg, var(--brand), var(--brand2));
      color:#fff !important;
      box-shadow:0 10px 20px rgba(31,157,121,.22);
    }
    .hero{
      padding:28px 0 24px;
    }
    .hero-grid{
      display:grid;
      grid-template-columns: 1.2fr .8fr;
      gap:22px;
      align-items:stretch;
    }
    .hero-panel{
      position:relative;
      overflow:hidden;
      background:
        linear-gradient(135deg, rgba(31,157,121,.08), rgba(104,200,162,.18)),
        linear-gradient(180deg, #ffffff, #f8fffc);
      border:1px solid rgba(217,233,226,.85);
      border-radius:28px;
      box-shadow:var(--shadow);
      padding:34px;
      min-height:360px;
    }
    .hero-panel::before,
    .hero-panel::after{
      content:"";
      position:absolute;
      border-radius:50%;
      pointer-events:none;
    }
    .hero-panel::before{
      width:220px;height:220px;
      background:radial-gradient(circle, rgba(104,200,162,.22), transparent 70%);
      top:-80px;right:-40px;
    }
    .hero-panel::after{
      width:180px;height:180px;
      background:radial-gradient(circle, rgba(31,157,121,.14), transparent 68%);
      bottom:-70px;left:-50px;
    }
    .eyebrow{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:8px 12px;
      background:#eefaf5;
      color:var(--brand);
      border:1px solid #d8f1e6;
      border-radius:999px;
      font-size:13px;
      font-weight:600;
    }
    h1{
      margin:18px 0 14px;
      font-size:clamp(32px, 4vw, 54px);
      line-height:1.08;
      letter-spacing:-.8px;
    }
    .lead{
      font-size:17px;
      line-height:1.8;
      color:#34514b;
      max-width:62ch;
      margin:0 0 20px;
    }
    .hero-actions{
      display:flex;
      flex-wrap:wrap;
      gap:12px;
      margin-top:20px;
    }
    .btn{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:8px;
      padding:13px 18px;
      border-radius:14px;
      border:1px solid transparent;
      font-weight:600;
      transition:transform .2s ease, box-shadow .2s ease, background .2s ease;
      cursor:pointer;
    }
    .btn:hover{transform:translateY(-2px)}
    .btn-primary{
      background:linear-gradient(135deg, var(--brand), #27b588);
      color:#fff;
      box-shadow:0 14px 24px rgba(31,157,121,.22);
    }
    .btn-secondary{
      background:#fff;
      border-color:var(--line);
      color:var(--text);
    }
    .hero-stats{
      display:grid;
      grid-template-columns:repeat(2, minmax(0, 1fr));
      gap:14px;
      margin-top:24px;
    }
    .stat{
      background:rgba(255,255,255,.8);
      border:1px solid rgba(217,233,226,.9);
      border-radius:18px;
      padding:16px;
      box-shadow:var(--shadow2);
    }
    .stat strong{
      display:block;
      font-size:22px;
      color:var(--brand);
      margin-bottom:6px;
    }
    .stat span{font-size:13px;color:var(--muted);line-height:1.5}
    .hero-side{
      display:grid;
      gap:16px;
    }
    .side-card{
      background:rgba(255,255,255,.92);
      border:1px solid rgba(217,233,226,.9);
      border-radius:24px;
      padding:22px;
      box-shadow:var(--shadow2);
    }
    .side-card h2,.section-title{
      margin:0 0 10px;
      font-size:24px;
      line-height:1.2;
    }
    .section{
      padding:18px 0 8px;
    }
    .section-title-wrap{
      display:flex;
      align-items:end;
      justify-content:space-between;
      gap:16px;
      margin-bottom:16px;
    }
    .section-sub{
      margin:0;
      color:var(--muted);
      line-height:1.7;
      max-width:70ch;
      font-size:15px;
    }
    .grid-3,.grid-4{
      display:grid;
      gap:16px;
    }
    .grid-3{grid-template-columns:repeat(3, minmax(0, 1fr))}
    .grid-4{grid-template-columns:repeat(4, minmax(0, 1fr))}
    .card{
      background:var(--card);
      border:1px solid rgba(217,233,226,.95);
      border-radius:22px;
      box-shadow:var(--shadow2);
      padding:20px;
      transition:transform .22s ease, box-shadow .22s ease, border-color .22s ease;
    }
    .card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#cde6db}
    .card h3{margin:0 0 10px;font-size:18px}
    .card p,.card li{color:var(--muted);line-height:1.75}
    .icon{
      width:44px;height:44px;
      display:grid;place-items:center;
      border-radius:14px;
      background:#eefaf5;
      color:var(--brand);
      margin-bottom:14px;
      font-size:20px;
    }
    .chips{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
    }
    .chip{
      padding:8px 12px;
      border-radius:999px;
      background:#f3fbf7;
      border:1px solid #deefe7;
      color:#395751;
      font-size:13px;
    }
    .table-wrap{
      overflow-x:auto;
      background:#fff;
      border:1px solid rgba(217,233,226,.95);
      border-radius:22px;
      box-shadow:var(--shadow2);
    }
    table{
      width:100%;
      border-collapse:collapse;
      min-width:860px;
    }
    th,td{
      padding:14px 16px;
      text-align:left;
      border-bottom:1px solid #edf4f0;
      vertical-align:top;
    }
    th{
      background:#f3fbf7;
      color:#23463d;
      font-size:14px;
    }
    td{color:#38524c;font-size:14px;line-height:1.65}
    .rating{
      display:flex;
      gap:6px;
      flex-wrap:wrap;
      margin-top:8px;
      color:#e39b12;
      font-size:18px;
    }
    .process{
      display:grid;
      grid-template-columns:repeat(4, minmax(0, 1fr));
      gap:16px;
    }
    .step{
      position:relative;
      padding:22px 18px;
      border-radius:22px;
      background:linear-gradient(180deg, #ffffff, #f9fffc);
      border:1px solid var(--line);
    }
    .step b{
      display:inline-flex;
      width:34px;height:34px;
      align-items:center;justify-content:center;
      border-radius:999px;
      background:var(--brand);
      color:#fff;
      margin-bottom:12px;
    }
    .split{
      display:grid;
      grid-template-columns:1fr 1fr;
      gap:16px;
      align-items:start;
    }
    .list{
      margin:0;padding-left:18px;
    }
    .list li{margin:8px 0}
    .faq details{
      background:#fff;
      border:1px solid var(--line);
      border-radius:18px;
      box-shadow:var(--shadow2);
      padding:0 18px;
    }
    .faq details+details{margin-top:12px}
    .faq summary{
      cursor:pointer;
      list-style:none;
      padding:18px 0;
      font-weight:600;
      color:#23463d;
    }
    .faq summary::-webkit-details-marker{display:none}
    .faq .answer{
      padding:0 0 18px;
      color:var(--muted);
      line-height:1.75;
    }
    .reviews{
      display:grid;
      grid-template-columns:repeat(3, minmax(0, 1fr));
      gap:16px;
    }
    .review .meta{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:12px;
      margin-bottom:12px;
    }
    .review .name{font-weight:700}
    .review .role{font-size:13px;color:var(--muted)}
    .review .quote{color:var(--muted);line-height:1.78}
    .timeline{
      display:grid;
      gap:14px;
    }
    .timeline-item{
      display:grid;
      grid-template-columns:90px 1fr;
      gap:14px;
      align-items:start;
      padding:18px;
      border-radius:20px;
      background:#fff;
      border:1px solid var(--line);
    }
    .timeline-item .time{
      color:var(--brand);
      font-weight:700;
    }
    .article-list{
      display:grid;
      grid-template-columns:repeat(3, minmax(0, 1fr));
      gap:16px;
    }
    .article a{
      color:var(--brand);
      font-weight:600;
    }
    .form{
      display:grid;
      grid-template-columns:1.05fr .95fr;
      gap:16px;
      align-items:start;
    }
    form{
      background:#fff;
      border:1px solid var(--line);
      border-radius:24px;
      box-shadow:var(--shadow2);
      padding:20px;
    }
    .field-grid{
      display:grid;
      grid-template-columns:repeat(2, minmax(0, 1fr));
      gap:12px;
    }
    .field{display:flex;flex-direction:column;gap:8px}
    label{font-size:14px;font-weight:600;color:#2a463f}
    input,select,textarea{
      width:100%;
      border:1px solid #cfe2da;
      background:#fbfffd;
      color:var(--text);
      border-radius:14px;
      padding:12px 14px;
      font:inherit;
      outline:none;
      transition:border-color .2s ease, box-shadow .2s ease;
    }
    input:focus,select:focus,textarea:focus{
      border-color:#67c8a1;
      box-shadow:0 0 0 4px rgba(31,157,121,.10);
    }
    textarea{min-height:126px;resize:vertical}
    .submit-row{
      display:flex;
      flex-wrap:wrap;
      gap:12px;
      align-items:center;
      margin-top:14px;
    }
    .kefu{
      display:grid;
      gap:14px;
    }
    .qr{
      display:flex;
      align-items:center;
      gap:14px;
      background:#f6fbf8;
      border:1px solid var(--line);
      border-radius:20px;
      padding:14px;
    }
    .qr img{
      width:110px;
      height:110px;
      object-fit:cover;
      border-radius:16px;
      background:#fff;
      border:1px solid #dcebe4;
    }
    .footer{
      margin-top:24px;
      border-top:1px solid rgba(217,233,226,.95);
      background:linear-gradient(180deg, #f7fbf9, #eef7f2);
      color:#27423c;
    }
    .footer-inner{
      padding:22px 0;
      display:grid;
      gap:14px;
    }
    .footer-links{
      display:flex;
      flex-wrap:wrap;
      gap:10px 14px;
    }
    .footer-links a{
      color:#2d6f58;
      font-size:14px;
    }
    .footer-note{
      color:#56716c;
      font-size:13px;
      line-height:1.8;
    }
    .floating{
      position:fixed;
      right:18px;
      bottom:18px;
      z-index:60;
      display:grid;
      gap:10px;
    }
    .float-btn{
      width:52px;height:52px;
      border-radius:16px;
      display:grid;
      place-items:center;
      background:linear-gradient(135deg, var(--brand), #26b286);
      color:#fff;
      box-shadow:0 14px 26px rgba(31,157,121,.26);
      font-size:20px;
    }
    .backtop{
      position:fixed;
      right:18px;
      bottom:82px;
      z-index:60;
      width:52px;height:52px;
      border-radius:16px;
      border:1px solid var(--line);
      background:#fff;
      color:#295146;
      display:none;
      box-shadow:var(--shadow2);
      cursor:pointer;
    }
    .fade-up{
      opacity:0;
      transform:translateY(18px);
      transition:opacity .7s ease, transform .7s ease;
    }
    .fade-up.show{
      opacity:1;
      transform:none;
    }
    @media (max-width: 980px){
      .hero-grid,.grid-3,.grid-4,.process,.reviews,.article-list,.split,.form{
        grid-template-columns:1fr;
      }
      .nav-links{
        display:none;
        width:100%;
        padding:10px 0 4px;
      }
      .nav-links.open{display:flex}
      .nav{
        flex-wrap:wrap;
      }
      .menu-toggle{display:inline-flex}
      .hero-panel{padding:26px}
      .section-title-wrap{align-items:start;flex-direction:column}
      .field-grid{grid-template-columns:1fr}
    }
    @media (max-width: 640px){
      .container{width:min(var(--container), calc(100% - 22px))}
      .hero{padding-top:18px}
      .hero-panel{padding:22px;border-radius:22px}
      .hero-stats{grid-template-columns:1fr}
      .card,.side-card,.timeline-item{border-radius:18px}
      h1{font-size:30px}
      .lead{font-size:15px}
      .qr{flex-direction:column;align-items:flex-start}
      .qr img{width:96px;height:96px}
      .backtop,.float-btn{width:48px;height:48px;border-radius:14px}
    }