:root{--bg:#f4f7fb;--card:#ffffff;--card2:#f8fbff;--text:#152033;--muted:#5d6a7f;--line:#dbe5f1;--primary:#0b5cff;--primary2:#2e7bff;--accent:#19a5ff;--gold:#ffb54d;--shadow:0 18px 50px rgba(11,92,255,.12);--radius:20px}
    *{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:radial-gradient(circle at top left,rgba(11,92,255,.10),transparent 25%),linear-gradient(180deg,#f8fbff 0%,#f4f7fb 50%,#eef4fb 100%);color:var(--text)}
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(1180px,calc(100% - 32px));margin:0 auto}
    header{position:sticky;top:0;z-index:50;background:rgba(248,251,255,.86);backdrop-filter:blur(12px);border-bottom:1px solid rgba(219,229,241,.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:42px;height:42px;border-radius:12px;object-fit:contain;background:#fff;padding:6px;border:1px solid var(--line);box-shadow:0 8px 20px rgba(21,32,51,.06)}
    .brand-text{min-width:0}
    .brand-text strong{display:block;font-size:18px;line-height:1.1}
    .brand-text span{display:block;font-size:12px;color:var(--muted);margin-top:4px}
    .menu-btn{display:none;border:1px solid var(--line);background:#fff;border-radius:12px;padding:10px 12px;color:var(--text)}
    .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:10px;transition:.2s ease}
    .nav-links a:hover{background:rgba(11,92,255,.08);color:var(--primary)}
    .home-btn{background:linear-gradient(135deg,var(--primary),var(--primary2));color:#fff !important;padding:10px 14px !important;box-shadow:0 12px 24px rgba(11,92,255,.18)}
    main{padding:24px 0 10px}
    section{padding:24px 0}
    .hero{padding-top:18px}
    .hero-grid{display:grid;grid-template-columns:1.35fr .9fr;gap:22px;align-items:stretch}
    .hero-panel,.card,.table-card,.quote-card,.faq-item,.form-card,.timeline,.cta-card{background:linear-gradient(180deg,var(--card),var(--card2));border:1px solid rgba(219,229,241,.92);border-radius:var(--radius);box-shadow:var(--shadow)}
    .hero-panel{padding:34px;position:relative;overflow:hidden}
    .hero-panel:before,.hero-panel:after{content:"";position:absolute;border-radius:999px;pointer-events:none}
    .hero-panel:before{width:260px;height:260px;right:-90px;top:-80px;background:radial-gradient(circle,rgba(46,123,255,.18),transparent 70%)}
    .hero-panel:after{width:180px;height:180px;right:50px;bottom:-85px;background:radial-gradient(circle,rgba(255,181,77,.16),transparent 70%)}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;background:rgba(11,92,255,.08);color:var(--primary);font-size:13px;font-weight:700}
    h1{font-size:clamp(30px,5vw,54px);line-height:1.08;margin:18px 0 14px}
    .hero p{margin:0;color:var(--muted);font-size:16px;line-height:1.8;max-width:58ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 18px;border-radius:14px;border:1px solid transparent;font-weight:700;transition:transform .2s ease,box-shadow .2s ease,background .2s ease}
    .btn-primary{background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;box-shadow:0 14px 24px rgba(11,92,255,.22)}
    .btn-ghost{background:#fff;border-color:var(--line);color:var(--text)}
    .btn:hover,.menu-btn:hover{transform:translateY(-2px)}
    .hero-side{display:grid;gap:16px}
    .mini-stat{padding:20px}
    .mini-stat strong{display:block;font-size:28px;color:var(--primary)}
    .mini-stat span{display:block;margin-top:6px;color:var(--muted);line-height:1.6}
    .home-link{display:inline-flex;align-items:center;gap:8px;margin-top:12px;color:var(--primary);font-weight:700}
    .data-grid,.feature-grid,.benefit-grid,.case-grid,.review-grid,.article-grid,.network-grid,.faq-grid,.price-grid,.tag-cloud,.compare-grid,.workflow-grid{display:grid;gap:16px}
    .data-grid{grid-template-columns:repeat(4,1fr)}
    .card{padding:22px}
    .card h2,.section-title h2{margin:0 0 10px;font-size:clamp(24px,3vw,34px)}
    .section-title{display:flex;justify-content:space-between;align-items:end;gap:16px;margin-bottom:16px}
    .section-title p{margin:0;color:var(--muted);max-width:62ch;line-height:1.8}
    .metric{display:flex;flex-direction:column;gap:8px}
    .metric strong{font-size:26px}
    .metric span{color:var(--muted);line-height:1.7}
    .feature-grid,.benefit-grid,.case-grid,.review-grid,.article-grid,.network-grid,.price-grid,.faq-grid,.compare-grid{grid-template-columns:repeat(3,1fr)}
    .feature-card h3,.case-card h3,.review-card h3,.article-card h3,.faq-item summary,.price-card h3{margin:0 0 10px;font-size:18px}
    .feature-card p,.case-card p,.review-card p,.article-card p,.price-card p,.network-grid p{margin:0;color:var(--muted);line-height:1.75}
    .icon{width:44px;height:44px;border-radius:14px;display:grid;place-items:center;background:linear-gradient(135deg,rgba(11,92,255,.12),rgba(25,165,255,.12));color:var(--primary);font-weight:800;margin-bottom:14px}
    .workflow-grid{grid-template-columns:repeat(4,1fr)}
    .step{padding:20px;border-radius:18px;background:#fff;border:1px solid var(--line)}
    .step b{display:inline-flex;width:34px;height:34px;border-radius:50%;align-items:center;justify-content:center;background:rgba(11,92,255,.1);color:var(--primary);margin-bottom:12px}
    .table-card{padding:0;overflow:hidden}
    table{width:100%;border-collapse:collapse}
    th,td{padding:16px 18px;border-bottom:1px solid var(--line);vertical-align:top;text-align:left}
    th{background:#f0f6ff;color:#17315f;font-size:14px}
    td{color:var(--text);font-size:14px;line-height:1.7}
    .table-wrap{overflow-x:auto}
    .compare-note{padding:18px 20px;border-top:1px solid var(--line);background:#fbfdff;color:var(--muted);line-height:1.8}
    .tags{display:flex;flex-wrap:wrap;gap:10px}
    .tags span{padding:9px 12px;background:#fff;border:1px solid var(--line);border-radius:999px;color:#234;box-shadow:0 8px 18px rgba(21,32,51,.04)}
    .timeline{padding:22px}
    .timeline ul{list-style:none;padding:0;margin:0;display:grid;gap:14px}
    .timeline li{display:grid;grid-template-columns:auto 1fr;gap:14px;align-items:start}
    .dot{width:12px;height:12px;border-radius:50%;margin-top:7px;background:linear-gradient(135deg,var(--primary),var(--accent));box-shadow:0 0 0 6px rgba(11,92,255,.1)}
    .faq-item{padding:0;overflow:hidden}
    .faq-item summary{list-style:none;padding:18px 20px;cursor:pointer;position:relative;padding-right:46px}
    .faq-item summary::-webkit-details-marker{display:none}
    .faq-item summary:after{content:"+";position:absolute;right:18px;top:50%;transform:translateY(-50%);width:28px;height:28px;display:grid;place-items:center;border-radius:8px;background:#eef4ff;color:var(--primary);font-weight:800}
    .faq-item[open] summary:after{content:"−"}
    .faq-item .answer{padding:0 20px 18px;color:var(--muted);line-height:1.8}
    .review-card{position:relative}
    .stars{color:#ffb23f;letter-spacing:2px;font-size:14px;margin-bottom:10px}
    .author{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:14px;color:var(--muted);font-size:14px}
    .price-card{padding:22px;border:1px solid var(--line)}
    .price{font-size:30px;color:var(--primary);font-weight:800;margin:10px 0}
    .image-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    .image-grid img,.gallery-single img{width:100%;border-radius:18px;border:1px solid var(--line);background:#fff;object-fit:cover}
    .gallery-single{margin-top:14px}
    .form-card{padding:24px}
    form{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    .full{grid-column:1/-1}
    label{display:block;font-size:14px;font-weight:700;margin-bottom:8px;color:#233}
    input,select,textarea{width:100%;border:1px solid var(--line);border-radius:14px;background:#fff;padding:13px 14px;font:inherit;color:var(--text);outline:none}
    textarea{min-height:120px;resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:rgba(11,92,255,.5);box-shadow:0 0 0 4px rgba(11,92,255,.08)}
    .submit-row{display:flex;justify-content:flex-start;align-items:center;gap:12px;flex-wrap:wrap}
    footer{margin-top:12px;padding:26px 0 28px;background:#0d1730;color:#d8e4ff}
    footer a{color:#fff}
    .footer-grid{display:grid;grid-template-columns:1.1fr .9fr 1fr;gap:18px}
    .footer-grid p,.footer-grid li{color:#b9c8e8;line-height:1.8}
    .footer-grid ul{list-style:none;padding:0;margin:0;display:grid;gap:8px}
    .footer-title{font-size:16px;font-weight:800;margin:0 0 12px;color:#fff}
    .floating{position:fixed;right:16px;bottom:16px;z-index:60;display:grid;gap:10px}
    .float-btn{width:54px;height:54px;border-radius:50%;display:grid;place-items:center;background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;box-shadow:0 18px 30px rgba(11,92,255,.28);border:none;cursor:pointer}
    .qr-card{position:absolute;right:64px;bottom:0;width:220px;padding:14px;background:#fff;color:var(--text);border-radius:18px;border:1px solid var(--line);box-shadow:var(--shadow);display:none}
    .qr-wrap{position:relative}
    .qr-wrap:hover .qr-card{display:block}
    .qr-card img{width:100%;border-radius:14px}
    .qr-card p{margin:10px 0 0;color:var(--muted);font-size:13px;line-height:1.6}
    .scroll-top{display:none}
    .reveal{opacity:0;transform:translateY(18px);transition:.7s ease}
    .reveal.show{opacity:1;transform:none}
    .subtle{color:var(--muted)}
    @media (max-width: 980px){
      .hero-grid,.data-grid,.feature-grid,.benefit-grid,.case-grid,.review-grid,.article-grid,.network-grid,.price-grid,.faq-grid,.compare-grid,.workflow-grid,.footer-grid{grid-template-columns:1fr 1fr}
      .hero-grid{grid-template-columns:1fr}
      .section-title{flex-direction:column;align-items:start}
    }
    @media (max-width: 720px){
      .menu-btn{display:inline-flex}
      .nav{flex-wrap:wrap}
      .nav-links{display:none;flex-direction:column;align-items:flex-start;width:100%;padding:10px 0 4px}
      .nav-links.open{display:flex}
      .data-grid,.feature-grid,.benefit-grid,.case-grid,.review-grid,.article-grid,.network-grid,.price-grid,.faq-grid,.compare-grid,.workflow-grid,.footer-grid,.hero-grid{grid-template-columns:1fr}
      form{grid-template-columns:1fr}
      .hero-panel{padding:24px}
      .hero-actions{flex-direction:column;align-items:stretch}
      .btn{width:100%}
      .qr-card{right:0;bottom:66px}
      th,td{padding:14px 12px}
    }
    @media (prefers-reduced-motion: reduce){
      html{scroll-behavior:auto}
      *,*::before,*::after{animation:none !important;transition:none !important}
    }