:root{
      --bg:#f6f8fc;
      --bg2:#eef3ff;
      --card:#ffffff;
      --ink:#132036;
      --muted:#5f6b84;
      --line:#dfe7f5;
      --brand:#6b5cff;
      --brand2:#19c2ff;
      --accent:#ff7b54;
      --success:#18b37e;
      --shadow:0 18px 40px rgba(28,45,90,.08);
      --radius:22px;
      --container:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;font-family:system-ui,-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;background:radial-gradient(circle at top left,#eef6ff 0,#f6f8fc 28%,#f8fbff 100%);color:var(--ink);line-height:1.65}
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    .container{width:min(var(--container),calc(100% - 32px));margin:0 auto}
    .site-shell{position:relative;overflow:hidden}
    .bg-orb,.bg-orb2{position:fixed;border-radius:50%;filter:blur(22px);pointer-events:none;opacity:.55;z-index:0}
    .bg-orb{width:280px;height:280px;background:rgba(107,92,255,.12);top:-60px;right:-70px}
    .bg-orb2{width:220px;height:220px;background:rgba(25,194,255,.12);bottom:120px;left:-80px}
    header,main,footer{position:relative;z-index:1}
    .topbar{background:rgba(255,255,255,.72);backdrop-filter:blur(10px);border-bottom:1px solid rgba(223,231,245,.9)}
    .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:40px;height:40px;object-fit:contain}
    .brand-text{display:flex;flex-direction:column;min-width:0}
    .brand-text strong{font-size:16px;line-height:1.1}
    .brand-text span{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:#30405e;padding:8px 10px;border-radius:999px;transition:.2s}
    .nav-links a:hover{background:#eef3ff;color:var(--brand)}
    .nav-actions{display:flex;align-items:center;gap:10px}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;border-radius:999px;padding:12px 18px;font-weight:700;cursor:pointer;transition:.22s;white-space:nowrap}
    .btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;box-shadow:0 12px 26px rgba(107,92,255,.24)}
    .btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 30px rgba(107,92,255,.28)}
    .btn-ghost{background:#f3f7ff;color:#24324c;border:1px solid #d9e3f7}
    .btn-ghost:hover{border-color:#c8d7f6;background:#edf4ff}
    .menu-btn{display:none;background:#f3f7ff;border:1px solid #d9e3f7;border-radius:12px;padding:10px 12px}
    .hero{padding:42px 0 22px}
    .hero-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:22px;align-items:stretch}
    .hero-copy,.hero-panel,.section-card,.metric,.service-card,.quote,.faq-item,.timeline-item,.article-card,.compare-card,.review-card,.about-card,.network-card,.price-card,.tag-card,.info-card,.form-card{background:rgba(255,255,255,.92);border:1px solid rgba(223,231,245,.95);box-shadow:var(--shadow);border-radius:var(--radius)}
    .hero-copy{padding:34px;position:relative;overflow:hidden}
    .hero-copy:before{content:"";position:absolute;inset:auto -50px -70px auto;width:180px;height:180px;background:radial-gradient(circle,rgba(107,92,255,.18),rgba(107,92,255,0) 72%)}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--brand);font-weight:700;font-size:13px;background:#eef3ff;border:1px solid #dce5fb;padding:8px 12px;border-radius:999px}
    h1{margin:16px 0 12px;font-size:clamp(30px,4vw,52px);line-height:1.08;letter-spacing:-.03em}
    .lead{margin:0;color:var(--muted);font-size:16px;max-width:60ch}
    .hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin:24px 0 18px}
    .hero-points{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:18px}
    .mini-point{padding:14px 14px;border-radius:18px;background:linear-gradient(180deg,#f9fbff,#f2f6ff);border:1px solid #dce5fb}
    .mini-point strong{display:block;font-size:15px;margin-bottom:4px}
    .mini-point span{font-size:13px;color:var(--muted)}
    .hero-panel{padding:26px;display:flex;flex-direction:column;gap:16px;justify-content:space-between;background:linear-gradient(180deg,rgba(16,27,49,.98),rgba(27,41,74,.96));color:#edf3ff}
    .hero-panel .panel-title{font-size:14px;letter-spacing:.16em;text-transform:uppercase;color:#9fcfff}
    .hero-panel .panel-note{color:#bfd1ee;font-size:14px}
    .stat-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
    .stat{padding:16px;border-radius:18px;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1)}
    .stat strong{display:block;font-size:24px;color:#fff}
    .stat span{font-size:13px;color:#d6e2f5}
    section{padding:18px 0}
    .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:68ch}
    .grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
    .grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
    .grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
    .metric,.service-card,.review-card,.compare-card,.price-card,.tag-card,.info-card,.about-card,.network-card,.article-card,.timeline-item,.faq-item,.form-card{padding:20px}
    .metric strong,.service-card strong,.price-card strong{display:block;font-size:20px;margin-bottom:8px}
    .metric p,.service-card p,.review-card p,.compare-card p,.price-card p,.tag-card p,.info-card p,.about-card p,.network-card p,.article-card p,.timeline-item p{margin:0;color:var(--muted)}
    .service-card{position:relative;overflow:hidden}
    .service-card:after{content:"";position:absolute;inset:auto -28px -28px auto;width:100px;height:100px;border-radius:50%;background:radial-gradient(circle,rgba(25,194,255,.13),rgba(25,194,255,0) 70%)}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag{padding:9px 12px;border-radius:999px;background:#f3f7ff;border:1px solid #dfe7f5;font-size:13px;color:#2b3955}
    .process{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
    .step{padding:20px;border-radius:20px;background:linear-gradient(180deg,#fff,#f6f9ff);border:1px solid #dce5fb}
    .step .num{display:inline-flex;width:34px;height:34px;border-radius:12px;background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;align-items:center;justify-content:center;font-weight:800;margin-bottom:12px}
    .compare-wrap{overflow:auto;border-radius:22px;border:1px solid #dfe7f5;background:#fff;box-shadow:var(--shadow)}
    table{width:100%;border-collapse:collapse;min-width:760px}
    th,td{padding:16px;border-bottom:1px solid #e9eef8;text-align:left;vertical-align:top}
    th{background:#f6f9ff;font-size:14px}
    tr:last-child td{border-bottom:0}
    .good{color:#0f8f63;font-weight:700}
    .bad{color:#c64b4b;font-weight:700}
    .faq-list details{background:#fff;border:1px solid #dfe7f5;border-radius:18px;padding:16px 18px;box-shadow:var(--shadow)}
    .faq-list{display:grid;gap:12px}
    summary{cursor:pointer;font-weight:700;list-style:none}
    summary::-webkit-details-marker{display:none}
    .faq-list p{margin:10px 0 0;color:var(--muted)}
    .reviews .review-card{display:flex;flex-direction:column;gap:12px}
    .avatar{width:44px;height:44px;border-radius:14px;background:linear-gradient(135deg,rgba(107,92,255,.14),rgba(25,194,255,.18));display:flex;align-items:center;justify-content:center;font-weight:800;color:var(--brand)}
    .review-head{display:flex;align-items:center;gap:12px}
    .stars{color:#f6b400;letter-spacing:2px;font-size:14px}
    .gallery{display:grid;grid-template-columns:1.2fr .8fr;gap:14px}
    .gallery .image-card{overflow:hidden;border-radius:22px;border:1px solid #dfe7f5;background:#fff;box-shadow:var(--shadow)}
    .image-card img{width:100%;height:auto}
    .articles{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
    .article-card a{display:inline-flex;margin-top:12px;color:var(--brand);font-weight:700}
    .form-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
    input,select,textarea{width:100%;padding:14px 15px;border-radius:14px;border:1px solid #d9e3f7;background:#fff;color:var(--ink);font:inherit;outline:none}
    textarea{min-height:120px;resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:#9eb5f4;box-shadow:0 0 0 4px rgba(107,92,255,.08)}
    .full{grid-column:1/-1}
    .footer{padding:24px 0 34px;margin-top:8px;background:#0f1728;color:#dbe6ff}
    .footer a{color:#9fd2ff}
    .footer .container{display:grid;gap:18px}
    .footer-top{display:grid;grid-template-columns:1.1fr .9fr .9fr;gap:14px}
    .footer-card{padding:18px;border-radius:20px;background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.08)}
    .footer small{color:#a7b6d8}
    .floating{position:fixed;right:18px;bottom:18px;z-index:20;display:flex;flex-direction:column;gap:10px}
    .float-btn{width:48px;height:48px;border-radius:16px;background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;border:0;box-shadow:0 14px 28px rgba(107,92,255,.3);cursor:pointer}
    .kefu{display:flex;align-items:center;gap:12px;padding:12px 14px;background:#fff;border:1px solid #dfe7f5;border-radius:18px;box-shadow:var(--shadow)}
    .kefu img{width:88px;height:88px;object-fit:cover;border-radius:14px}
    .mobile-menu{display:none}
    .scroll-in{opacity:0;transform:translateY(16px);transition:opacity .7s ease,transform .7s ease}
    .scroll-in.show{opacity:1;transform:none}
    .subtle-badge{display:inline-flex;align-items:center;padding:6px 10px;border-radius:999px;background:#eef8ff;color:#0e7490;font-size:12px;font-weight:700}
    .two-col{display:grid;grid-template-columns:1fr 1fr;gap:14px}
    .section-card{padding:22px}
    .service-network{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
    .price-list{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
    .timeline{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
    .link-list{display:flex;flex-wrap:wrap;gap:10px}
    .link-list a{padding:8px 10px;background:#f3f7ff;border:1px solid #dfe7f5;border-radius:999px}
    @media (max-width: 980px){
      .hero-grid,.grid-4,.grid-3,.grid-2,.process,.articles,.gallery,.footer-top,.service-network,.price-list,.timeline,.two-col{grid-template-columns:1fr}
      .section-head{align-items:flex-start;flex-direction:column}
      .nav-links{display:none}
      .menu-btn{display:inline-flex}
      .mobile-menu{display:none;padding:0 0 14px}
      .mobile-menu.open{display:block}
      .mobile-menu .nav-links{display:flex;flex-direction:column;align-items:flex-start;gap:8px;padding:12px 0}
      .form-grid{grid-template-columns:1fr}
      .hero-copy,.hero-panel{padding:24px}
      .hero-points{grid-template-columns:1fr}
    }