:root{
      --bg:#f6f8fc;
      --card:#ffffff;
      --text:#182033;
      --muted:#5f6b85;
      --line:#dbe3f1;
      --brand:#4f46e5;
      --brand2:#00b3ff;
      --accent:#ff5ea8;
      --shadow:0 20px 50px rgba(31, 48, 84, .10);
      --shadow2:0 10px 24px rgba(79,70,229,.12);
      --radius:22px;
      --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;background:radial-gradient(circle at top left,#eef4ff 0,#f7f9fd 35%,#f6f8fc 100%);color:var(--text)}
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(var(--max),calc(100% - 32px));margin:0 auto}
    header{position:sticky;top:0;z-index:30;background:rgba(246,248,252,.82);backdrop-filter:blur(14px);border-bottom:1px solid rgba(219,227,241,.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 .word{font-weight:800;letter-spacing:.5px}
    .brand small{display:block;color:var(--muted);font-weight:600}
    .logo-wrap{width:44px;height:44px;flex:0 0 auto;display:grid;place-items:center;border-radius:14px;background:linear-gradient(135deg,rgba(79,70,229,.12),rgba(0,179,255,.12));border:1px solid rgba(79,70,229,.16);overflow:hidden}
    .logo-wrap img{width:100%;height:100%;object-fit:contain}
    .nav-links{display:flex;align-items:center;gap:14px;flex-wrap:wrap;justify-content:flex-end}
    .nav-links a{color:var(--muted);font-weight:600;padding:8px 10px;border-radius:999px;transition:.2s ease}
    .nav-links a:hover,.nav-links a.active{background:#fff;color:var(--text);box-shadow:var(--shadow2)}
    .hero{padding:30px 0 10px}
    .hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:20px;align-items:stretch}
    .hero-main,.hero-side,.panel,.card,.faq-item,.review,.case,.article,.form-box,.table-box,.timeline,.pricing,.compare,.network,.tag-cloud,.help-box,footer{background:var(--card);border:1px solid rgba(219,227,241,.9);border-radius:var(--radius);box-shadow:var(--shadow)}
    .hero-main{padding:34px;position:relative;overflow:hidden}
    .hero-main:before,.hero-main:after{content:"";position:absolute;border-radius:50%;filter:blur(12px);pointer-events:none}
    .hero-main:before{width:220px;height:220px;background:rgba(79,70,229,.14);top:-60px;right:-20px}
    .hero-main:after{width:160px;height:160px;background:rgba(0,179,255,.16);bottom:-50px;left:-30px}
    .kicker{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;background:linear-gradient(135deg,rgba(79,70,229,.09),rgba(255,94,168,.09));color:#39456a;font-size:13px;font-weight:700}
    h1{margin:16px 0 12px;font-size:clamp(32px,5vw,54px);line-height:1.05;letter-spacing:-.02em}
    .lead{font-size:16px;line-height:1.8;color:var(--muted);max-width:62ch}
    .cta-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 18px;border-radius:14px;font-weight:800;border:1px solid transparent;transition:.22s ease;cursor:pointer}
    .btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;box-shadow:0 14px 30px rgba(79,70,229,.24)}
    .btn-secondary{background:#fff;color:var(--text);border-color:var(--line)}
    .btn:hover{transform:translateY(-2px)}
    .hero-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:22px}
    .stat{padding:16px;border-radius:18px;background:linear-gradient(180deg,#fff, #f8fbff);border:1px solid rgba(219,227,241,.95)}
    .stat strong{display:block;font-size:22px}
    .stat span{font-size:13px;color:var(--muted)}
    .hero-side{padding:22px}
    .mini-title{font-size:18px;margin:0 0 10px}
    .mini-list{display:grid;gap:10px}
    .mini-item{padding:12px 14px;border-radius:16px;background:#f9fbff;border:1px solid #e4ebf6;color:var(--muted)}
    section{padding:18px 0}
    .section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:14px}
    .section-head h2{margin:0;font-size:28px}
    .section-head p{margin:0;color:var(--muted);max-width:62ch;line-height:1.7}
    .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .card,.review,.case,.article,.faq-item,.help-box,.panel,.pricing,.compare,.table-box,.timeline,.network,.tag-cloud{padding:22px}
    .card h3,.review h3,.case h3,.article h3,.help-box h3{margin:0 0 8px;font-size:18px}
    .card p,.review p,.case p,.article p,.help-box 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(79,70,229,.12),rgba(0,179,255,.12));margin-bottom:14px}
    .timeline{display:grid;gap:14px}
    .step{display:grid;grid-template-columns:auto 1fr;gap:14px;align-items:start;padding:14px;border-radius:18px;background:#f9fbff;border:1px solid #e6edf8}
    .step b{display:inline-grid;place-items:center;width:34px;height:34px;border-radius:50%;background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff}
    .table-box{overflow:auto}
    table{width:100%;border-collapse:collapse;min-width:860px}
    th,td{padding:14px 12px;border-bottom:1px solid #e6edf8;text-align:left;vertical-align:top}
    th{color:#33415e;background:#f8fbff}
    td{color:var(--muted)}
    .score{font-weight:800;color:#1f2b49}
    .pill{display:inline-flex;align-items:center;padding:6px 10px;border-radius:999px;background:#eef4ff;color:#3d4e80;font-size:12px;font-weight:700;margin:0 8px 8px 0}
    .faq-list{display:grid;gap:12px}
    .faq-item{padding:0;overflow:hidden}
    .faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:12px;padding:18px 20px;background:#fff;border:0;color:var(--text);font-size:16px;font-weight:800;text-align:left;cursor:pointer}
    .faq-a{max-height:0;overflow:hidden;transition:max-height .25s ease, padding .25s ease;border-top:1px solid transparent}
    .faq-a p{margin:0;padding:0 20px 18px;color:var(--muted);line-height:1.75}
    .faq-item.open .faq-a{max-height:180px}
    .faq-item.open .faq-q{border-bottom:1px solid #eef2fa}
    .reviews,.cases,.articles,.tags,.help-grid,.network-grid,.pricing-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .form-box form{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    .form-box label{display:grid;gap:8px;font-weight:700;color:#33415e;font-size:14px}
    .form-box input,.form-box select,.form-box textarea{width:100%;padding:13px 14px;border-radius:14px;border:1px solid #dbe3f1;background:#fff;color:var(--text);outline:none}
    .form-box textarea{min-height:120px;grid-column:1/-1;resize:vertical}
    .form-box .full{grid-column:1/-1}
    .form-box button{justify-self:start}
    footer{margin:18px auto 0;padding:22px}
    .footer-grid{display:grid;grid-template-columns:1.2fr .8fr .9fr;gap:18px}
    .footer-links{display:flex;flex-wrap:wrap;gap:10px}
    .footer-links a{color:#3d4e80}
    .copyright{margin-top:14px;color:var(--muted);font-size:13px;line-height:1.7}
    .floating{position:fixed;right:16px;bottom:16px;z-index:40;display:grid;gap:10px}
    .float-btn{width:52px;height:52px;border-radius:16px;display:grid;place-items:center;background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;box-shadow:0 18px 30px rgba(79,70,229,.28);font-weight:900}
    .float-contact{position:fixed;left:16px;bottom:16px;z-index:40;background:#fff;border:1px solid var(--line);border-radius:18px;padding:12px;box-shadow:var(--shadow);max-width:240px}
    .float-contact img{width:88px;height:88px;object-fit:cover;border-radius:14px;border:1px solid #e6edf8}
    .badge{display:inline-block;margin-top:10px;color:var(--muted);font-size:13px}
    .articles .article .meta,.case .meta,.review .meta{margin-top:10px;color:#60708f;font-size:13px}
    .tags{grid-template-columns:repeat(4,1fr)}
    .tag-cloud a{display:inline-flex;padding:8px 10px;border-radius:999px;background:#f3f7ff;color:#40517f;font-size:13px;margin:0 8px 8px 0}
    .table-note{margin-top:10px;color:var(--muted);font-size:13px;line-height:1.7}
    .menu-btn{display:none;border:1px solid var(--line);background:#fff;border-radius:14px;padding:10px 12px;font-weight:800}
    .mobile-nav{display:none}
    @media (max-width: 1024px){
      .hero-grid,.grid-4,.reviews,.cases,.articles,.tags,.help-grid,.network-grid,.pricing-grid,.footer-grid,.grid-3{grid-template-columns:1fr 1fr}
      .hero-main{padding:28px}
    }
    @media (max-width: 768px){
      .nav-links{display:none}
      .menu-btn{display:inline-flex}
      .mobile-nav{display:none;padding:0 0 16px}
      .mobile-nav.open{display:grid;gap:8px}
      .mobile-nav a{padding:12px 14px;border-radius:14px;background:#fff;border:1px solid var(--line);color:var(--text);font-weight:700}
      .hero-grid,.grid-4,.reviews,.cases,.articles,.tags,.help-grid,.network-grid,.pricing-grid,.footer-grid,.grid-3,.form-box form{grid-template-columns:1fr}
      .hero-stats{grid-template-columns:1fr}
      .section-head{flex-direction:column;align-items:flex-start}
      .hero-main{padding:24px}
      .form-box textarea,.form-box .full{grid-column:auto}
      .float-contact{max-width:180px}
    }
    .fade-up{opacity:0;transform:translateY(18px);transition:.6s ease}
    .fade-up.in{opacity:1;transform:none}