:root{
      --bg:#f5f8ff;
      --bg2:#eef4ff;
      --card:#ffffff;
      --text:#16304f;
      --muted:#5f7288;
      --line:#d7e3f5;
      --primary:#1766ff;
      --primary2:#0b3fae;
      --accent:#28b3ff;
      --soft:#eaf2ff;
      --shadow:0 18px 45px rgba(20, 63, 132, .12);
      --radius:22px;
      --container: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;background:linear-gradient(180deg,var(--bg) 0%,#ffffff 42%,#f7faff 100%);color:var(--text)}
    a{color:var(--primary);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:30;background:rgba(245,248,255,.88);backdrop-filter:blur(14px);border-bottom:1px solid rgba(215,227,245,.8)}
    .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 img{width:44px;height:44px;object-fit:contain;border-radius:12px;background:#fff;border:1px solid var(--line);padding:4px}
    .brand .name{font-weight:800;color:var(--primary2);letter-spacing:.4px}
    .brand .sub{font-size:12px;color:var(--muted)}
    .nav-links{display:flex;align-items:center;gap:18px;flex-wrap:wrap;justify-content:flex-end}
    .nav-links a{font-size:14px;color:var(--text);padding:8px 10px;border-radius:999px;transition:.25s}
    .nav-links a:hover,.nav-links a.active{background:var(--soft);color:var(--primary2)}
    .nav-cta{display:flex;align-items:center;gap:10px}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:none;border-radius:999px;padding:12px 18px;font-weight:700;cursor:pointer;transition:.25s;box-shadow:none}
    .btn-primary{background:linear-gradient(135deg,var(--primary) 0%,#4b8dff 100%);color:#fff;box-shadow:0 12px 25px rgba(23,102,255,.24)}
    .btn-secondary{background:#fff;color:var(--primary2);border:1px solid var(--line)}
    .btn:hover{transform:translateY(-1px);filter:saturate(1.03)}
    .menu-toggle{display:none;background:#fff;border:1px solid var(--line);border-radius:14px;padding:10px 12px}
    .hero{position:relative;overflow:hidden;padding:40px 0 28px}
    .hero::before,.hero::after{content:"";position:absolute;border-radius:50%;pointer-events:none}
    .hero::before{width:360px;height:360px;background:radial-gradient(circle,rgba(40,179,255,.18),rgba(40,179,255,0) 70%);top:-110px;right:-100px}
    .hero::after{width:260px;height:260px;background:radial-gradient(circle,rgba(23,102,255,.16),rgba(23,102,255,0) 70%);left:-90px;bottom:-80px}
    .hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:24px;align-items:stretch}
    .hero-copy,.hero-panel,.section-card,.panel,.faq-item,.review-card,.article-card,.contact-card,.service-card,.step-card,.metric,.compare-card,.price-card{background:rgba(255,255,255,.88);border:1px solid rgba(215,227,245,.95);border-radius:var(--radius);box-shadow:var(--shadow)}
    .hero-copy{padding:34px}
    .kicker{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;background:#eaf2ff;color:var(--primary2);font-weight:700;font-size:13px}
    h1{margin:18px 0 14px;font-size:clamp(30px,5vw,54px);line-height:1.1;letter-spacing:-.6px}
    .lead{margin:0;color:var(--muted);font-size:16px;line-height:1.85;max-width:58ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
    .hero-points{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:24px}
    .point{padding:14px;border-radius:18px;background:linear-gradient(180deg,#f7fbff,#eef5ff);border:1px solid var(--line)}
    .point strong{display:block;font-size:18px;color:var(--primary2)}
    .point span{display:block;font-size:13px;color:var(--muted);margin-top:4px;line-height:1.5}
    .hero-panel{padding:22px}
    .hero-metrics{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
    .metric{padding:18px;background:linear-gradient(180deg,#ffffff,#f6f9ff)}
    .metric .n{font-size:28px;font-weight:900;color:var(--primary2)}
    .metric .t{font-size:13px;color:var(--muted);margin-top:8px;line-height:1.5}
    .panel{padding:22px;margin-top:14px}
    .panel h2,.section-title h2{margin:0 0 10px;font-size:26px}
    .panel p,.section-sub{margin:0;color:var(--muted);line-height:1.8}
    .section{padding:16px 0 28px}
    .section-title{display:flex;align-items:end;justify-content:space-between;gap:18px;margin-bottom:18px}
    .section-title p{margin:0;color:var(--muted);max-width:68ch;line-height:1.8}
    .grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
    .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}
    .service-card,.step-card,.review-card,.article-card,.price-card,.contact-card,.compare-card{padding:20px}
    .service-card h3,.step-card h3,.review-card h3,.article-card h3,.price-card h3,.contact-card h3{margin:0 0 10px;font-size:18px}
    .service-card p,.step-card p,.review-card p,.article-card p,.price-card p{margin:0;color:var(--muted);line-height:1.8}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag{padding:10px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);font-size:13px;color:var(--text)}
    .timeline{display:grid;gap:12px}
    .timeline-item{display:flex;gap:14px;padding:16px 18px;border-radius:18px;background:#fff;border:1px solid var(--line)}
    .timeline-dot{width:12px;height:12px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--accent));margin-top:6px;flex:0 0 auto}
    .timeline-item strong{display:block;margin-bottom:6px}
    .table-wrap{overflow:auto;border-radius:18px;border:1px solid var(--line);background:#fff}
    table{width:100%;border-collapse:collapse;min-width:760px}
    th,td{padding:16px 14px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
    th{background:#f2f7ff;color:var(--primary2)}
    tr:last-child td{border-bottom:none}
    .rating{display:inline-flex;align-items:center;gap:8px;padding:10px 12px;border-radius:999px;background:#eff6ff;color:var(--primary2);font-weight:700}
    .faq{display:grid;gap:12px}
    .faq-item{overflow:hidden}
    .faq-q{width:100%;background:none;border:none;padding:18px 20px;text-align:left;color:var(--text);font-weight:700;font-size:16px;display:flex;justify-content:space-between;gap:12px;cursor:pointer}
    .faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease;padding:0 20px}
    .faq-item.open .faq-a{padding-bottom:18px;max-height:220px}
    .faq-a p{margin:0;color:var(--muted);line-height:1.8}
    .reviews .review-card{display:flex;flex-direction:column;gap:12px}
    .review-meta{display:flex;align-items:center;justify-content:space-between;gap:10px;color:var(--muted);font-size:13px}
    .stars{color:#f4b400;letter-spacing:2px}
    .case-banner{display:grid;grid-template-columns:1.05fr .95fr;gap:16px}
    .image-stack{display:grid;grid-template-columns:1fr 1fr;gap:12px}
    .image-stack img{width:100%;border-radius:18px;border:1px solid var(--line);object-fit:cover}
    .image-stack .wide{grid-column:1 / -1}
    .form{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
    .form .full{grid-column:1 / -1}
    input,select,textarea{width:100%;padding:13px 14px;border:1px solid var(--line);border-radius:14px;background:#fff;color:var(--text);font:inherit;outline:none}
    textarea{min-height:120px;resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:rgba(23,102,255,.55);box-shadow:0 0 0 4px rgba(23,102,255,.08)}
    .contact-list{display:grid;gap:10px;margin-top:14px}
    .contact-item{padding:13px 14px;border-radius:16px;background:#f7fbff;border:1px solid var(--line);color:var(--text)}
    .footer{margin-top:26px;padding:24px 0 28px;background:#eef4ff;border-top:1px solid var(--line);color:var(--text)}
    .footer a{color:var(--primary2)}
    .footer-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:16px;align-items:start}
    .footer small{color:var(--muted);line-height:1.8}
    .floating{position:fixed;right:16px;bottom:16px;z-index:40;display:grid;gap:10px}
    .float-btn{width:52px;height:52px;border-radius:16px;border:none;background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;display:grid;place-items:center;box-shadow:0 14px 30px rgba(23,102,255,.28);cursor:pointer}
    .float-contact{position:fixed;left:16px;bottom:16px;z-index:40;display:flex;align-items:center;gap:12px;padding:12px 14px;border-radius:18px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow)}
    .float-contact img{width:58px;height:58px;border-radius:12px;object-fit:cover;border:1px solid var(--line)}
    .reveal{opacity:0;transform:translateY(16px);transition:opacity .6s ease,transform .6s ease}
    .reveal.show{opacity:1;transform:none}
    .mobile-menu{display:none}
    @media (max-width: 980px){
      .hero-grid,.case-banner,.footer-grid,.grid-4,.grid-3{grid-template-columns:1fr}
      .hero-points,.hero-metrics{grid-template-columns:1fr 1fr}
      .section-title{align-items:flex-start;flex-direction:column}
      .nav-links{display:none}
      .menu-toggle{display:inline-flex}
      .mobile-menu{display:none;padding:0 0 14px}
      .mobile-menu.open{display:block}
      .mobile-menu a{display:block;padding:12px 0;border-top:1px solid rgba(215,227,245,.9);color:var(--text)}
      .float-contact{max-width:calc(100% - 96px)}
    }
    @media (max-width: 640px){
      .container{width:min(var(--container),calc(100% - 20px))}
      .hero-copy,.hero-panel,.section-card,.panel{padding:18px}
      .hero-points,.hero-metrics,.grid-2,.form{grid-template-columns:1fr}
      .hero-actions{flex-direction:column}
      .btn{width:100%}
      .float-contact{display:none}
    }