:root{
      --bg:#f4fbfb;
      --panel:#ffffff;
      --panel-2:#eef9fa;
      --line:#d8ebee;
      --text:#14303a;
      --muted:#5a6d74;
      --brand:#17a7a5;
      --brand2:#3b7cff;
      --accent:#0f7f94;
      --shadow:0 18px 45px rgba(16, 58, 67, .08);
      --radius:20px;
      --radius-sm:14px;
      --container:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",Segoe UI,Roboto,Helvetica,Arial,sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(23,167,165,.11), transparent 28%),
        radial-gradient(circle at top right, rgba(59,124,255,.10), transparent 24%),
        linear-gradient(180deg, #f8fdfd 0%, #eff9fa 100%);
      line-height:1.65;
      overflow-x:hidden;
    }
    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:saturate(150%) blur(14px);
      background:rgba(244,251,251,.82);
      border-bottom:1px solid rgba(216,235,238,.85);
    }
    .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 img{width:42px; height:42px; object-fit:contain; border-radius:12px; background:#fff; box-shadow:0 8px 20px rgba(0,0,0,.06)}
    .brand strong{display:block; font-size:1rem; line-height:1.15}
    .brand span{display:block; font-size:.82rem; color:var(--muted)}
    .nav-toggle{
      display:none; border:1px solid var(--line); background:#fff; color:var(--text);
      border-radius:12px; padding:10px 12px; cursor:pointer;
    }
    .nav-menu{display:flex; align-items:center; gap:14px; flex-wrap:wrap; justify-content:flex-end}
    .nav-menu a{font-size:.95rem; color:#284149; padding:8px 10px; border-radius:999px; transition:.2s ease}
    .nav-menu a:hover{background:#e6f6f7; color:#0b6f74}
    .btn{
      display:inline-flex; align-items:center; justify-content:center; gap:8px;
      border:none; border-radius:999px; padding:12px 18px; cursor:pointer;
      font-weight:700; transition:.22s ease; box-shadow:none;
    }
    .btn-primary{background:linear-gradient(135deg, var(--brand), var(--brand2)); color:#fff; box-shadow:0 12px 28px rgba(23,167,165,.23)}
    .btn-primary:hover{transform:translateY(-2px); box-shadow:0 16px 35px rgba(23,167,165,.28)}
    .btn-ghost{background:#fff; color:var(--text); border:1px solid var(--line)}
    .btn-ghost:hover{transform:translateY(-2px); border-color:#b8dfe2}
    .hero{padding:34px 0 18px}
    .hero-grid{
      display:grid; grid-template-columns:1.2fr .8fr; gap:24px; align-items:stretch;
    }
    .hero-panel, .card, .section-box, .faq-item, .review, .news-item, .case, .compare, .form-wrap, .price-box{
      background:rgba(255,255,255,.88); border:1px solid rgba(216,235,238,.95);
      border-radius:var(--radius); box-shadow:var(--shadow);
    }
    .hero-panel{padding:30px; position:relative; overflow:hidden}
    .hero-panel::before, .hero-panel::after{
      content:""; position:absolute; border-radius:50%; pointer-events:none; opacity:.8;
    }
    .hero-panel::before{width:240px; height:240px; right:-90px; top:-90px; background:radial-gradient(circle, rgba(23,167,165,.16), transparent 64%)}
    .hero-panel::after{width:180px; height:180px; right:30px; bottom:-90px; background:radial-gradient(circle, rgba(59,124,255,.12), transparent 68%)}
    .eyebrow{display:inline-flex; align-items:center; gap:8px; padding:7px 12px; background:#e8fbfa; color:#0b7676; border:1px solid #d0f0ef; border-radius:999px; font-size:.88rem; font-weight:700}
    h1{font-size:clamp(2rem, 4vw, 3.6rem); line-height:1.08; margin:16px 0 14px}
    .hero p{margin:0; color:var(--muted); font-size:1.02rem}
    .hero-actions{display:flex; flex-wrap:wrap; gap:12px; margin-top:22px}
    .hero-highlights{display:grid; grid-template-columns:repeat(3,1fr); gap:12px; margin-top:22px}
    .mini-stat{
      background:linear-gradient(180deg, #f7feff, #eefbfc); border:1px solid #dbf0f2;
      border-radius:18px; padding:14px;
    }
    .mini-stat strong{display:block; font-size:1.25rem}
    .mini-stat span{font-size:.9rem; color:var(--muted)}
    .hero-side{display:grid; gap:14px}
    .hero-side .panel{
      padding:20px; background:linear-gradient(180deg, rgba(17,166,165,.08), rgba(255,255,255,.9));
      border:1px solid rgba(23,167,165,.18); border-radius:var(--radius); box-shadow:var(--shadow)
    }
    .panel h3{margin:0 0 8px; font-size:1.08rem}
    .chips{display:flex; flex-wrap:wrap; gap:10px; margin-top:12px}
    .chip{padding:7px 11px; border-radius:999px; background:#fff; border:1px solid var(--line); font-size:.88rem; color:#2a4a53}
    .grid-4{display:grid; grid-template-columns:repeat(4,1fr); gap:14px}
    .grid-3{display:grid; grid-template-columns:repeat(3,1fr); gap:14px}
    .grid-2{display:grid; grid-template-columns:repeat(2,1fr); gap:14px}
    section{padding:14px 0 8px}
    .section-head{display:flex; justify-content:space-between; align-items:end; gap:16px; margin-bottom:14px}
    .section-head h2{margin:0; font-size:1.7rem}
    .section-head p{margin:0; color:var(--muted)}
    .section-box{padding:22px}
    .card{padding:18px}
    .card h3,.card h4{margin:0 0 10px}
    .card p{margin:0; color:var(--muted)}
    .metric strong{display:block; font-size:1.5rem; margin-bottom:6px}
    .metric span{color:var(--muted); font-size:.92rem}
    .service-list,.timeline,.bullet-list{list-style:none; padding:0; margin:0}
    .service-list li,.bullet-list li{padding:10px 0; border-top:1px dashed #dcecee}
    .service-list li:first-child,.bullet-list li:first-child{border-top:none; padding-top:0}
    .tag-cloud{display:flex; flex-wrap:wrap; gap:10px}
    .tag-cloud span{padding:8px 12px; border-radius:999px; background:#f5fbfc; border:1px solid #dbecef; color:#35515a; font-size:.88rem}
    .timeline li{position:relative; padding:0 0 16px 22px; border-left:1px solid #d9e9ec; margin-left:10px}
    .timeline li::before{content:""; position:absolute; left:-5px; top:6px; width:10px; height:10px; background:linear-gradient(135deg,var(--brand),var(--brand2)); border-radius:50%}
    .timeline strong{display:block; margin-bottom:4px}
    .table-wrap{overflow:auto; border-radius:18px; border:1px solid var(--line)}
    table{width:100%; border-collapse:collapse; min-width:860px; background:#fff}
    th,td{padding:14px 16px; text-align:left; border-bottom:1px solid #edf2f3}
    th{background:#f2fbfc; color:#16343d}
    tr:hover td{background:#fbfeff}
    .compare-title{display:flex; justify-content:space-between; gap:12px; flex-wrap:wrap; align-items:center; margin-bottom:12px}
    .rating{
      display:inline-flex; gap:6px; align-items:center; padding:8px 12px; border-radius:999px; background:#ebfbfa; color:#0a7572; border:1px solid #ccefed; font-weight:700
    }
    .reviews .review{padding:18px}
    .review .meta{display:flex; justify-content:space-between; gap:10px; margin-bottom:10px; color:var(--muted); font-size:.92rem}
    .quote{font-size:.98rem; color:#27424a}
    .article-list{display:grid; gap:10px}
    .news-item{padding:16px 18px; display:flex; justify-content:space-between; gap:16px; align-items:center}
    .news-item span{color:var(--muted); font-size:.92rem}
    .news-item a{color:#0e6f74; font-weight:700}
    .form-wrap{padding:22px}
    form{display:grid; gap:14px}
    .field-grid{display:grid; grid-template-columns:repeat(2,1fr); gap:14px}
    label{display:block; font-size:.92rem; margin-bottom:8px; color:#25464f; font-weight:700}
    input,select,textarea{
      width:100%; border:1px solid #cfe2e5; border-radius:14px; background:#fff; color:var(--text);
      padding:12px 14px; font:inherit; outline:none; transition:.2s ease;
    }
    input:focus,select:focus,textarea:focus{border-color:#7fcfd1; box-shadow:0 0 0 4px rgba(23,167,165,.10)}
    textarea{min-height:120px; resize:vertical}
    .submit-row{display:flex; gap:12px; flex-wrap:wrap; align-items:center}
    .contact-card{display:grid; gap:14px}
    .contact-top{display:grid; grid-template-columns:1fr 220px; gap:14px; align-items:start}
    .qrcode{padding:14px; background:#f7fcfd; border:1px solid #d9ecee; border-radius:18px; text-align:center}
    .qrcode img{margin:0 auto 10px; width:180px; border-radius:14px}
    .floating{
      position:fixed; right:16px; bottom:16px; z-index:60; display:grid; gap:10px
    }
    .float-btn{
      display:inline-flex; align-items:center; justify-content:center; width:48px; height:48px; border-radius:50%;
      background:linear-gradient(135deg,var(--brand),var(--brand2)); color:#fff; box-shadow:0 10px 24px rgba(23,167,165,.28); border:none; cursor:pointer
    }
    .backtop{opacity:0; pointer-events:none; transform:translateY(10px); transition:.25s ease}
    .backtop.show{opacity:1; pointer-events:auto; transform:translateY(0)}
    .footer{
      margin-top:12px; padding:24px 0 28px; border-top:1px solid rgba(216,235,238,.9);
      background:rgba(242,251,252,.9); color:#29414a;
    }
    .footer a{color:#0c7176}
    .footer-grid{display:grid; grid-template-columns:1.2fr .8fr; gap:18px}
    .footer small{color:#5c7178}
    .fade-in{opacity:0; transform:translateY(18px); transition:.55s ease}
    .fade-in.in{opacity:1; transform:translateY(0)}
    .faq-item{overflow:hidden}
    .faq-q{
      width:100%; display:flex; justify-content:space-between; align-items:center; gap:16px;
      padding:18px 20px; border:none; background:transparent; color:var(--text); font:inherit; font-weight:700; cursor:pointer; text-align:left;
    }
    .faq-a{max-height:0; overflow:hidden; transition:max-height .28s ease; padding:0 20px}
    .faq-item.active .faq-a{padding-bottom:18px}
    .faq-a p{margin:0; color:var(--muted)}
    .mobile-only{display:none}
    .service-hero{
      display:grid; grid-template-columns:1fr 1fr; gap:14px;
    }
    .banner-stack{display:grid; grid-template-columns:repeat(3,1fr); gap:12px}
    .banner-stack img{border-radius:18px; border:1px solid var(--line); box-shadow:var(--shadow)}
    .home-link{font-weight:700; color:#0e7075}
    @media (max-width: 1100px){
      .hero-grid,.footer-grid,.contact-top,.service-hero{grid-template-columns:1fr}
      .grid-4{grid-template-columns:repeat(2,1fr)}
      .grid-3{grid-template-columns:repeat(2,1fr)}
    }
    @media (max-width: 760px){
      .container{width:min(var(--container), calc(100% - 22px))}
      .nav-toggle{display:inline-flex}
      .nav-menu{display:none; width:100%; padding:12px 0 0}
      .nav-menu.open{display:flex; flex-direction:column; align-items:flex-start}
      .nav{flex-wrap:wrap}
      .hero{padding-top:18px}
      .hero-panel{padding:22px}
      .hero-highlights,.grid-4,.grid-3,.grid-2,.field-grid,.banner-stack{grid-template-columns:1fr}
      .section-head{flex-direction:column; align-items:flex-start}
      .mobile-only{display:block}
      .table-wrap{border-radius:16px}
    }