:root{
      --bg:#f5fbf7;
      --card:#ffffff;
      --muted:#5e6d67;
      --text:#183026;
      --line:#dcebe3;
      --accent:#20a36a;
      --accent2:#7ddbb2;
      --accent3:#dff7ea;
      --gold:#d8a94a;
      --shadow:0 14px 38px rgba(22,67,45,.08);
      --radius:20px;
      --radius-sm:14px;
      --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;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(125,219,178,.24), transparent 24%),
        radial-gradient(circle at top right, rgba(32,163,106,.12), transparent 18%),
        linear-gradient(180deg,#f8fcf9 0%, #f5fbf7 38%, #f8fbfa 100%);
    }
    a{color:var(--accent);text-decoration:none}
    img{display:block;max-width:100%}
    .container{max-width:var(--max);margin:0 auto;padding:0 20px}
    .topbar{
      position:sticky;top:0;z-index:50;
      backdrop-filter:blur(14px);
      background:rgba(248,252,249,.82);
      border-bottom:1px solid rgba(220,235,227,.8);
    }
    .nav{
      display:flex;align-items:center;justify-content:space-between;gap:16px;
      min-height:76px;
    }
    .brand{display:flex;align-items:center;gap:12px;min-width:0}
    .brand .ai-page-logo{width:42px;height:42px;object-fit:contain;flex:0 0 auto}
    .brand-text{display:flex;flex-direction:column;min-width:0}
    .brand-text strong{font-size:18px;line-height:1.1}
    .brand-text span{font-size:12px;color:var(--muted)}
    .nav-links{display:flex;align-items:center;gap:16px;flex-wrap:wrap;justify-content:flex-end}
    .nav-links a{color:var(--text);font-size:14px;padding:8px 10px;border-radius:999px;transition:.2s ease}
    .nav-links a:hover,.nav-links a:focus{background:var(--accent3);color:var(--accent)}
    .nav-actions{display:flex;align-items:center;gap:10px}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      padding:12px 18px;border-radius:999px;border:1px solid transparent;
      font-weight:700;cursor:pointer;transition:.24s ease;box-shadow:none;
      white-space:nowrap;
    }
    .btn-primary{background:linear-gradient(135deg,var(--accent),#15965f);color:#fff;box-shadow:0 10px 24px rgba(32,163,106,.22)}
    .btn-primary:hover{transform:translateY(-2px);box-shadow:0 14px 28px rgba(32,163,106,.26)}
    .btn-ghost{background:#fff;border-color:var(--line);color:var(--text)}
    .btn-ghost:hover{transform:translateY(-2px);border-color:rgba(32,163,106,.3);color:var(--accent)}
    .menu-toggle{display:none}
    .hero{padding:42px 0 28px}
    .hero-grid{
      display:grid;grid-template-columns:1.15fr .85fr;gap:24px;align-items:stretch
    }
    .hero-copy{
      position:relative;overflow:hidden;
      background:
        linear-gradient(180deg,rgba(255,255,255,.94),rgba(246,253,249,.98)),
        linear-gradient(135deg,rgba(125,219,178,.08),rgba(32,163,106,.02));
      border:1px solid rgba(220,235,227,.8);
      border-radius:28px;padding:34px;box-shadow:var(--shadow)
    }
    .eyebrow{
      display:inline-flex;align-items:center;gap:8px;
      padding:8px 12px;border-radius:999px;background:var(--accent3);
      color:#166944;font-weight:700;font-size:13px;margin-bottom:14px
    }
    h1{margin:0 0 14px;font-size:clamp(30px,5vw,54px);line-height:1.08;letter-spacing:-.02em}
    .lead{margin:0 0 22px;color:var(--muted);font-size:16px;line-height:1.85;max-width:60ch}
    .hero-points{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin:22px 0}
    .mini{
      background:#fff;border:1px solid var(--line);border-radius:18px;padding:14px 14px 13px;
      box-shadow:0 8px 24px rgba(20,58,40,.05)
    }
    .mini strong{display:block;font-size:17px;margin-bottom:6px}
    .mini span{color:var(--muted);font-size:13px;line-height:1.6}
    .hero-cta{display:flex;flex-wrap:wrap;gap:12px;align-items:center;margin-top:18px}
    .trust-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
    .trust-tag{
      padding:9px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);
      color:#295544;font-size:13px
    }
    .hero-panel{
      display:flex;flex-direction:column;gap:16px
    }
    .panel-card{
      background:linear-gradient(180deg,#fff, #f7fcf9);
      border:1px solid rgba(220,235,227,.85);border-radius:24px;padding:20px;box-shadow:var(--shadow)
    }
    .panel-card h2{font-size:20px;margin:0 0 10px}
    .metric-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
    .metric{
      background:var(--accent3);border-radius:18px;padding:16px;border:1px solid rgba(32,163,106,.08)
    }
    .metric strong{display:block;font-size:22px;line-height:1.1}
    .metric span{display:block;margin-top:4px;color:var(--muted);font-size:13px;line-height:1.5}
    .section{padding:18px 0 6px}
    .section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;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:1.75}
    .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{
      background:rgba(255,255,255,.96);border:1px solid rgba(220,235,227,.9);border-radius:22px;
      padding:20px;box-shadow:0 10px 28px rgba(20,58,40,.05);transition:.22s ease
    }
    .card:hover{transform:translateY(-3px);box-shadow:0 16px 34px rgba(20,58,40,.09)}
    .card h3{margin:0 0 10px;font-size:18px}
    .card p, .card li{color:var(--muted);line-height:1.75}
    .service-list{display:grid;gap:12px}
    .service-item{
      display:flex;gap:12px;padding:15px;border-radius:18px;background:#fff;border:1px solid var(--line)
    }
    .dot{width:12px;height:12px;border-radius:50%;margin-top:8px;background:linear-gradient(135deg,var(--accent),var(--accent2));flex:0 0 auto}
    .pill-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .pill{padding:10px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);font-size:13px;color:#29463b}
    .steps{counter-reset:step}
    .step{
      position:relative;padding-left:18px
    }
    .step::before{
      counter-increment:step;content:counter(step);
      position:absolute;left:0;top:2px;width:26px;height:26px;border-radius:50%;
      background:var(--accent);color:#fff;font-weight:700;font-size:13px;display:grid;place-items:center
    }
    .step h3{margin-left:16px}
    .compare-wrap{overflow:auto;border-radius:22px;border:1px solid var(--line);background:#fff;box-shadow:var(--shadow)}
    table{width:100%;border-collapse:collapse;min-width:820px}
    th,td{padding:14px 16px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
    th{background:#eefaf4;color:#234338;font-size:14px}
    td{color:var(--muted)}
    .good{color:#14824f;font-weight:700}
    .rating-box{
      display:grid;grid-template-columns:1fr auto;gap:14px;align-items:center;
      background:linear-gradient(135deg,#effbf5,#ffffff);border:1px solid var(--line);border-radius:22px;padding:18px
    }
    .stars{color:#e0a73b;font-size:20px;letter-spacing:2px}
    .timeline{display:grid;gap:14px}
    .timeline-item{
      display:grid;grid-template-columns:120px 1fr;gap:16px;align-items:start;
      background:#fff;border:1px solid var(--line);border-radius:18px;padding:16px
    }
    .time{font-weight:800;color:var(--accent)}
    .review{display:grid;gap:12px}
    .review .who{display:flex;justify-content:space-between;gap:12px;align-items:center}
    .review .who strong{font-size:16px}
    .quote{margin:0;color:var(--muted);line-height:1.8}
    details{
      background:#fff;border:1px solid var(--line);border-radius:18px;padding:0 16px;overflow:hidden
    }
    details+details{margin-top:12px}
    summary{
      list-style:none;cursor:pointer;padding:16px 0;font-weight:700;color:var(--text);
      display:flex;justify-content:space-between;align-items:center;gap:14px
    }
    summary::-webkit-details-marker{display:none}
    summary::after{content:"+";color:var(--accent);font-size:22px;line-height:1}
    details[open] summary::after{content:"–"}
    details .faq-body{padding:0 0 16px;color:var(--muted);line-height:1.8}
    .articles{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
    .article{
      display:flex;flex-direction:column;gap:10px;background:#fff;border:1px solid var(--line);
      border-radius:20px;padding:18px
    }
    .article a{font-weight:800;color:var(--text)}
    .article p{margin:0;color:var(--muted);line-height:1.7}
    .form-card form{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
    .form-card .full{grid-column:1/-1}
    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:rgba(32,163,106,.45);box-shadow:0 0 0 4px rgba(32,163,106,.08)}
    textarea{min-height:128px;resize:vertical}
    .footer{
      margin-top:18px;padding:28px 0 22px;border-top:1px solid rgba(220,235,227,.95);
      background:linear-gradient(180deg,rgba(255,255,255,.6),rgba(241,248,244,.95));
      color:var(--text)
    }
    .footer-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:18px}
    .contact-box,.qr-box,.links-box{
      background:#fff;border:1px solid var(--line);border-radius:20px;padding:18px;box-shadow:0 10px 22px rgba(20,58,40,.04)
    }
    .footer a{color:var(--accent)}
    .footer .small{color:var(--muted);line-height:1.8}
    .footer-links{display:flex;flex-wrap:wrap;gap:10px}
    .footer-links a{padding:8px 10px;background:var(--accent3);border-radius:999px;color:#1e5a40}
    .floating{
      position:fixed;right:16px;bottom:16px;z-index:60;display:flex;flex-direction:column;gap:10px
    }
    .float-btn{
      width:48px;height:48px;border-radius:50%;display:grid;place-items:center;background:var(--accent);
      color:#fff;box-shadow:0 14px 28px rgba(32,163,106,.28);border:none;cursor:pointer
    }
    .float-card{
      width:min(92vw,290px);background:#fff;border:1px solid var(--line);border-radius:18px;padding:14px;box-shadow:var(--shadow)
    }
    .float-card img{border-radius:12px}
    .mobile-only{display:none}
    .scroll-reveal{opacity:0;transform:translateY(12px);transition:.5s ease}
    .scroll-reveal.in{opacity:1;transform:none}
    @media (max-width: 980px){
      .hero-grid,.footer-grid,.grid-3,.grid-2,.articles{grid-template-columns:1fr}
      .hero-points,.metric-grid{grid-template-columns:1fr 1fr}
      .section-head{flex-direction:column;align-items:flex-start}
    }
    @media (max-width: 760px){
      .nav{min-height:68px}
      .nav-links{
        display:none;position:absolute;left:20px;right:20px;top:74px;padding:12px;background:#fff;border:1px solid var(--line);
        border-radius:18px;box-shadow:var(--shadow)
      }
      .nav-links.open{display:flex;flex-direction:column;align-items:flex-start}
      .menu-toggle{display:inline-flex}
      .hero-copy{padding:24px}
      .hero-points,.metric-grid,.form-card form{grid-template-columns:1fr}
      .timeline-item{grid-template-columns:1fr}
      .mobile-only{display:block}
      .desktop-only{display:none}
    }