:root{
      --bg:#f5f8fb;
      --panel:#ffffff;
      --panel-2:#f0f7fb;
      --text:#163041;
      --muted:#5f7484;
      --line:#d9e6ee;
      --brand:#0f8db9;
      --brand-2:#18b7a7;
      --brand-3:#0a6ea8;
      --shadow:0 18px 48px rgba(16, 57, 83, .10);
      --radius:22px;
      --radius-sm:16px;
      --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(24,183,167,.12), transparent 28%),
        radial-gradient(circle at top right, rgba(15,141,185,.10), transparent 24%),
        linear-gradient(180deg, #f8fcff 0%, #f4f8fb 36%, #f7fafc 100%);
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%;height:auto}
    .container{width:min(var(--max), calc(100% - 32px)); margin:0 auto}
    header, main, footer{width:100%}
    .topbar{
      position:sticky; top:0; z-index:50;
      backdrop-filter:saturate(180%) blur(18px);
      background:rgba(245,248,251,.82);
      border-bottom:1px solid rgba(217,230,238,.72);
    }
    .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 .logo-wrap{
      width:42px; height:42px; border-radius:14px; overflow:hidden; flex:none;
      background:linear-gradient(135deg, rgba(15,141,185,.12), rgba(24,183,167,.12));
      border:1px solid var(--line);
      box-shadow:0 8px 20px rgba(16,57,83,.08);
      display:flex; align-items:center; justify-content:center;
      padding:5px;
    }
    .brand-text strong{display:block; font-size:1rem; line-height:1.2}
    .brand-text span{display:block; font-size:.82rem; color:var(--muted); margin-top:2px}
    .nav-links{display:flex; align-items:center; gap:18px; flex-wrap:wrap; justify-content:flex-end}
    .nav-links a{
      font-size:.92rem; color:#27485c; padding:8px 10px; border-radius:999px;
      transition:.2s ease;
    }
    .nav-links a:hover,.nav-links a:focus{background:rgba(15,141,185,.08); color:var(--brand-3)}
    .nav-cta{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; font-size:.94rem; cursor:pointer; transition:.22s ease;
      box-shadow:none; white-space:nowrap;
    }
    .btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand-2)); color:#fff; box-shadow:0 12px 28px rgba(15,141,185,.22)}
    .btn-primary:hover{transform:translateY(-1px); box-shadow:0 16px 30px rgba(15,141,185,.28)}
    .btn-ghost{background:#fff; border-color:var(--line); color:var(--text)}
    .btn-ghost:hover{border-color:rgba(15,141,185,.35); color:var(--brand-3); transform:translateY(-1px)}
    .menu-btn{display:none; width:44px; height:44px; border-radius:14px; border:1px solid var(--line); background:#fff; align-items:center; justify-content:center}
    .menu-btn span,.menu-btn span:before,.menu-btn span:after{content:""; display:block; width:18px; height:2px; background:#24465b; border-radius:2px; position:relative}
    .menu-btn span:before{position:absolute; top:-6px}
    .menu-btn span:after{position:absolute; top:6px}
    .hero{
      padding:30px 0 18px;
    }
    .hero-grid{
      display:grid; grid-template-columns:1.2fr .8fr; gap:20px; align-items:stretch;
    }
    .hero-card,.side-card,.section-card,.quote-card,.form-card,.faq-card,.article-card,.contact-card,.compare-card{
      background:linear-gradient(180deg, rgba(255,255,255,.96), rgba(248,252,255,.96));
      border:1px solid rgba(217,230,238,.9);
      border-radius:var(--radius);
      box-shadow:var(--shadow);
    }
    .hero-card{
      position:relative; overflow:hidden; padding:30px;
      background:
        radial-gradient(circle at 85% 10%, rgba(24,183,167,.14), transparent 24%),
        radial-gradient(circle at 15% 18%, rgba(15,141,185,.12), transparent 26%),
        linear-gradient(180deg, #ffffff 0%, #f7fbfe 100%);
    }
    .eyebrow{
      display:inline-flex; align-items:center; gap:8px; color:var(--brand-3); background:rgba(15,141,185,.08);
      border:1px solid rgba(15,141,185,.12); padding:8px 12px; border-radius:999px; font-size:.88rem; font-weight:700;
    }
    h1{margin:16px 0 12px; font-size:clamp(2rem, 4vw, 3.6rem); line-height:1.08; letter-spacing:-.03em}
    .lead{margin:0; font-size:1.06rem; line-height:1.85; color:var(--muted); max-width:60ch}
    .hero-actions{display:flex; flex-wrap:wrap; gap:12px; margin-top:22px}
    .hero-points{display:grid; grid-template-columns:repeat(3,1fr); gap:12px; margin-top:24px}
    .mini-stat{
      padding:16px; border-radius:18px; background:#fff; border:1px solid var(--line)
    }
    .mini-stat strong{display:block; font-size:1.18rem; margin-bottom:6px}
    .mini-stat span{color:var(--muted); font-size:.9rem; line-height:1.5}
    .hero-note{
      margin-top:18px; display:flex; flex-wrap:wrap; gap:10px;
    }
    .tag{padding:8px 12px; border-radius:999px; background:#edf8fb; border:1px solid #d6edf3; color:#1e5f76; font-size:.86rem}
    .side-card{padding:22px; display:flex; flex-direction:column; gap:16px}
    .side-card .cover{
      border-radius:20px; background:linear-gradient(145deg, rgba(15,141,185,.12), rgba(24,183,167,.08));
      border:1px solid var(--line); padding:18px;
    }
    .side-card h2,.section-head h2,.section-head h3{margin:0}
    .side-card h2{font-size:1.2rem}
    .side-list{display:grid; gap:12px}
    .side-item{display:flex; gap:12px; align-items:flex-start; padding:12px 0; border-top:1px dashed var(--line)}
    .side-item:first-child{border-top:none; padding-top:0}
    .dot{
      width:10px; height:10px; margin-top:7px; border-radius:50%;
      background:linear-gradient(135deg,var(--brand),var(--brand-2));
      box-shadow:0 0 0 5px rgba(15,141,185,.08)
    }
    .section{padding:18px 0}
    .section-card{padding:26px}
    .section-head{
      display:flex; align-items:end; justify-content:space-between; gap:16px; margin-bottom:18px
    }
    .section-head p{margin:0; color:var(--muted); line-height:1.75; max-width:72ch}
    .grid-4{display:grid; grid-template-columns:repeat(4,1fr); gap:14px}
    .metric,.service,.adv-card,.case-card,.review-card,.article-card,.contact-card,.compare-card,.price-card{padding:18px; border-radius:20px; border:1px solid var(--line); background:#fff}
    .metric strong,.service h3,.adv-card h3,.case-card h3,.review-card h3,.article-card h3,.contact-card h3,.price-card h3{display:block; margin:0 0 8px}
    .metric strong{font-size:1.45rem}
    .metric span{color:var(--muted); line-height:1.55}
    .grid-3{display:grid; grid-template-columns:repeat(3,1fr); gap:14px}
    .service p,.adv-card p,.case-card p,.review-card p,.article-card p,.contact-card p,.price-card p{margin:0; color:var(--muted); line-height:1.75}
    .service{transition:.22s ease}
    .service:hover,.adv-card:hover,.case-card:hover,.review-card:hover,.article-card:hover,.contact-card:hover,.price-card:hover{transform:translateY(-3px); box-shadow:0 18px 34px rgba(16,57,83,.08)}
    .badge-row{display:flex; flex-wrap:wrap; gap:8px; margin-top:12px}
    .badge{font-size:.8rem; color:#1f5c73; background:#eef9fc; border:1px solid #d5edf4; padding:6px 10px; border-radius:999px}
    .timeline{display:grid; gap:12px}
    .step{display:grid; grid-template-columns:72px 1fr; gap:14px; align-items:flex-start; padding:18px; border-radius:20px; background:#fff; border:1px solid var(--line)}
    .step-num{
      width:56px; height:56px; border-radius:18px; display:flex; align-items:center; justify-content:center;
      background:linear-gradient(135deg, rgba(15,141,185,.12), rgba(24,183,167,.12)); color:var(--brand-3); font-weight:800; font-size:1.2rem
    }
    .step h3{margin:0 0 6px}
    .comparison{overflow:auto; border-radius:18px; border:1px solid var(--line); background:#fff}
    table{width:100%; border-collapse:collapse; min-width:840px}
    th,td{padding:15px 14px; text-align:left; border-bottom:1px solid var(--line); vertical-align:top}
    th{background:#f4fbfe; color:#24485d; font-size:.94rem}
    td{color:#335165; line-height:1.7}
    .highlight{font-weight:800; color:#0b6f8f}
    .faq-list{display:grid; gap:12px}
    details{
      background:#fff; border:1px solid var(--line); border-radius:18px; padding:0 16px;
      box-shadow:0 10px 24px rgba(16,57,83,.04);
    }
    summary{
      cursor:pointer; list-style:none; padding:16px 0; font-weight:700; color:#24485d; display:flex; align-items:center; justify-content:space-between; gap:16px
    }
    summary::-webkit-details-marker{display:none}
    summary:after{content:"+"; color:var(--brand); font-size:1.3rem; line-height:1}
    details[open] summary:after{content:"−"}
    details p{margin:0 0 16px; color:var(--muted); line-height:1.8}
    .review-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:14px}
    .stars{color:#f39c12; letter-spacing:1px; margin-bottom:8px}
    .case-grid{display:grid; grid-template-columns:repeat(2,1fr); gap:14px}
    .case-meta{display:flex; flex-wrap:wrap; gap:8px; margin-top:14px}
    .article-list{display:grid; grid-template-columns:repeat(3,1fr); gap:14px}
    .article-card a.link{display:inline-flex; margin-top:12px; color:var(--brand-3); font-weight:700}
    .cloud{display:flex; flex-wrap:wrap; gap:10px}
    .cloud a{padding:9px 12px; border-radius:999px; background:#fff; border:1px solid var(--line); color:#2f5368}
    .cloud a:hover{border-color:rgba(15,141,185,.35); color:var(--brand-3)}
    .form-grid{display:grid; grid-template-columns:1.1fr .9fr; gap:14px}
    form{display:grid; gap:12px}
    .field-row{display:grid; grid-template-columns:repeat(2,1fr); gap:12px}
    label{display:block; font-size:.92rem; font-weight:700; margin-bottom:6px; color:#2a4a5d}
    input,select,textarea{
      width:100%; border:1px solid var(--line); background:#fff; color:var(--text);
      border-radius:14px; padding:12px 14px; outline:none; transition:.2s ease; font:inherit
    }
    input:focus,select:focus,textarea:focus{border-color:rgba(15,141,185,.55); box-shadow:0 0 0 4px rgba(15,141,185,.08)}
    textarea{min-height:124px; resize:vertical}
    .contact-list{display:grid; gap:12px}
    .contact-item{display:flex; gap:12px; align-items:flex-start; padding:14px 0; border-top:1px dashed var(--line)}
    .contact-item:first-child{border-top:none; padding-top:0}
    .footer{
      margin-top:10px; padding:24px 0 28px; border-top:1px solid rgba(217,230,238,.9);
      background:rgba(248,252,255,.88); color:#29475a
    }
    .footer-grid{display:grid; grid-template-columns:1.2fr .8fr; gap:18px; align-items:start}
    .footer a{color:#245b74}
    .footer a:hover{color:var(--brand-3)}
    .copyright{margin-top:14px; color:#5f7484; font-size:.92rem; line-height:1.7}
    .floating{
      position:fixed; right:18px; bottom:18px; z-index:60; display:grid; gap:10px;
    }
    .floating a,.floating button{
      width:48px; height:48px; border-radius:16px; border:1px solid var(--line); background:#fff;
      display:flex; align-items:center; justify-content:center; box-shadow:0 12px 28px rgba(16,57,83,.12); cursor:pointer
    }
    .floating a:hover,.floating button:hover{transform:translateY(-2px)}
    .mobile-nav{display:none}
    .scroll-reveal{opacity:0; transform:translateY(16px); transition:.55s ease}
    .scroll-reveal.show{opacity:1; transform:none}
    .home-link{font-weight:800; color:var(--brand-3)}
    .img-strip{display:grid; grid-template-columns:repeat(4,1fr); gap:12px}
    .img-strip img{border-radius:18px; border:1px solid var(--line); background:#fff}
    .two-col{display:grid; grid-template-columns:1fr 1fr; gap:14px}
    @media (max-width: 1080px){
      .hero-grid,.form-grid,.footer-grid,.review-grid,.article-list,.case-grid,.grid-4,.grid-3,.img-strip,.two-col{grid-template-columns:1fr 1fr}
    }
    @media (max-width: 820px){
      .nav-links,.nav-cta{display:none}
      .menu-btn{display:inline-flex}
      .mobile-nav{
        display:none; padding:0 0 16px;
      }
      .mobile-nav.open{display:block}
      .mobile-nav .wrap{
        display:grid; gap:8px; padding:14px 0 6px;
      }
      .mobile-nav a,.mobile-nav button{
        width:100%; justify-content:flex-start;
      }
      .hero-grid,.form-grid,.footer-grid,.review-grid,.article-list,.case-grid,.grid-4,.grid-3,.img-strip,.two-col{grid-template-columns:1fr}
      .hero-card,.section-card,.side-card{padding:20px}
      .hero-points{grid-template-columns:1fr}
      .field-row{grid-template-columns:1fr}
      .section-head{flex-direction:column; align-items:flex-start}
      .comparison{margin-right:-8px}
    }