:root{--bg:#f5f8ff;--bg2:#eef4ff;--card:#ffffff;--text:#11223a;--muted:#5b6b84;--line:#dbe5f7;--blue:#1957e6;--blue2:#2b79ff;--gold:#ffb400;--shadow:0 16px 40px rgba(25,87,230,.12);--radius:20px;--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;color:var(--text);background:linear-gradient(180deg,#f8fbff 0%,#eef4ff 50%,#f7f9ff 100%)}
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(var(--container),calc(100% - 32px));margin:0 auto}
    .topbar{position:sticky;top:0;z-index:50;background:rgba(248,251,255,.88);backdrop-filter:blur(12px);border-bottom:1px solid rgba(219,229,247,.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:42px;height:42px;object-fit:contain;border-radius:12px;background:#fff;border:1px solid var(--line);padding:4px}
    .brand strong{display:block;font-size:16px;line-height:1.1}
    .brand span{display:block;font-size:12px;color:var(--muted);margin-top:2px}
    .nav-links{display:flex;flex-wrap:wrap;align-items:center;gap:14px;font-size:14px;color:#244}
    .nav-links a{padding:8px 10px;border-radius:999px;transition:.2s}
    .nav-links a:hover,.nav-links a.active{background:#eaf1ff;color:var(--blue)}
    .nav-actions{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;transition:.25s;cursor:pointer}
    .btn-primary{background:linear-gradient(135deg,var(--blue),var(--blue2));color:#fff;box-shadow:0 12px 26px rgba(25,87,230,.22)}
    .btn-primary:hover{transform:translateY(-2px);box-shadow:0 18px 30px rgba(25,87,230,.28)}
    .btn-ghost{background:#fff;color:var(--blue);border-color:var(--line)}
    .btn-ghost:hover{border-color:#b7c8ee;transform:translateY(-1px)}
    .menu-toggle{display:none;background:#fff;border:1px solid var(--line);border-radius:12px;padding:10px 12px}
    .hero{padding:36px 0 18px}
    .hero-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:22px;align-items:stretch}
    .hero-copy,.hero-side,.card,.panel,.faq-item,.review,.timeline li,.article,.metric,.price,.compare,.form-wrap{background:var(--card);border:1px solid rgba(219,229,247,.95);border-radius:var(--radius);box-shadow:var(--shadow)}
    .hero-copy{padding:28px;position:relative;overflow:hidden}
    .hero-copy:before,.hero-copy:after{content:"";position:absolute;border-radius:999px;filter:blur(10px);opacity:.45}
    .hero-copy:before{width:220px;height:220px;right:-80px;top:-80px;background:radial-gradient(circle,var(--blue2),transparent 68%)}
    .hero-copy:after{width:160px;height:160px;right:80px;bottom:-60px;background:radial-gradient(circle,#7bb0ff,transparent 68%)}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;background:#eaf1ff;color:var(--blue);padding:8px 12px;border-radius:999px;font-size:13px;font-weight:700}
    h1{font-size:clamp(30px,4vw,54px);line-height:1.08;margin:16px 0 14px}
    .lead{font-size:16px;line-height:1.9;color:var(--muted);max-width:60ch}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}
    .hero-meta{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:22px}
    .mini{padding:14px 16px;background:linear-gradient(180deg,#f9fbff,#eff5ff);border:1px solid var(--line);border-radius:16px}
    .mini b{display:block;font-size:18px;margin-bottom:4px}
    .mini span{font-size:12px;color:var(--muted)}
    .hero-side{padding:22px;display:grid;gap:14px}
    .sidebox{padding:16px;border-radius:18px;background:linear-gradient(180deg,#f8fbff,#eef4ff);border:1px solid var(--line)}
    .sidebox h3{margin:0 0 8px;font-size:18px}
    .sidebox p{margin:0;color:var(--muted);line-height:1.8;font-size:14px}
    .section{padding:18px 0}
    .section h2{font-size:28px;margin:0 0 10px}
    .section p.section-desc{margin:0 0 18px;color:var(--muted);line-height:1.8}
    .grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .metric{padding:18px}
    .metric .num{font-size:26px;font-weight:800;color:var(--blue)}
    .metric .lab{margin-top:8px;font-weight:700}
    .metric .txt{margin-top:6px;color:var(--muted);font-size:14px;line-height:1.7}
    .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .card{padding:20px}
    .card h3{margin:0 0 10px;font-size:18px}
    .card p,.card li{color:var(--muted);line-height:1.8}
    .icon{width:44px;height:44px;border-radius:14px;background:linear-gradient(135deg,#eaf1ff,#dce9ff);display:grid;place-items:center;color:var(--blue);font-weight:900;margin-bottom:12px}
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag{padding:9px 12px;border-radius:999px;background:#eef4ff;border:1px solid var(--line);color:#2a4068;font-size:13px}
    .timeline{list-style:none;padding:0;margin:0;display:grid;gap:14px}
    .timeline li{padding:18px 18px 18px 20px;position:relative}
    .timeline li:before{content:"";position:absolute;left:0;top:20px;bottom:20px;width:4px;border-radius:99px;background:linear-gradient(180deg,var(--blue),#76abff)}
    .timeline b{display:block;margin-bottom:6px}
    .compare,.price,.article,.review,.faq-item,.form-wrap{padding:20px}
    .table-wrap{overflow:auto;border-radius:18px;border:1px solid var(--line)}
    table{width:100%;border-collapse:collapse;min-width:820px;background:#fff}
    th,td{padding:14px 12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
    th{background:#eef4ff;color:#20345a}
    .star{color:#ff9f1c;font-weight:800}
    details{border-top:1px solid var(--line);padding:14px 0}
    details:first-child{border-top:none;padding-top:0}
    summary{cursor:pointer;font-weight:700;list-style:none}
    summary::-webkit-details-marker{display:none}
    .faq-item p{margin:10px 0 0;color:var(--muted);line-height:1.8}
    .split{display:grid;grid-template-columns:1fr 1fr;gap:16px}
    .review .name{font-weight:800;margin-bottom:6px}
    .review .role{font-size:13px;color:var(--blue);margin-bottom:10px}
    .review p{margin:0;color:var(--muted);line-height:1.8}
    .articles{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .article a{color:var(--blue);font-weight:700}
    .article time{display:block;color:var(--muted);font-size:13px;margin-bottom:8px}
    .form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    label{display:block;font-size:14px;font-weight:700;margin-bottom:8px}
    input,select,textarea{width:100%;border:1px solid var(--line);border-radius:14px;padding:12px 14px;font:inherit;color:var(--text);background:#fff;outline:none;transition:.2s}
    input:focus,select:focus,textarea:focus{border-color:#90b4ff;box-shadow:0 0 0 4px rgba(43,121,255,.12)}
    textarea{min-height:120px;resize:vertical}
    .full{grid-column:1/-1}
    .footer{margin-top:18px;padding:24px 0 18px;background:#0f2346;color:#dbe8ff}
    .footer a{color:#fff}
    .footer .container{display:grid;gap:18px}
    .footer-top{display:grid;grid-template-columns:1.2fr .8fr;gap:18px;align-items:start}
    .footer-card{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1);border-radius:20px;padding:18px}
    .footer-links{display:flex;flex-wrap:wrap;gap:10px}
    .footer-links a{padding:8px 10px;border-radius:999px;background:rgba(255,255,255,.08)}
    .small{font-size:13px;color:#b9c8e6;line-height:1.8}
    .float-tools{position:fixed;right:16px;bottom:18px;z-index:40;display:grid;gap:10px}
    .float-tools a,.float-tools button{width:48px;height:48px;border-radius:16px;border:none;box-shadow:0 14px 30px rgba(17,34,58,.16);display:grid;place-items:center;background:#fff;color:var(--blue);font-weight:800;cursor:pointer}
    .drawer{display:none}
    .badge-line{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}
    .badge{padding:8px 11px;border-radius:999px;background:#f2f6ff;color:#29446f;border:1px solid var(--line);font-size:13px}
    .panel{padding:20px}
    .top-anchor{margin-top:12px;font-size:14px;color:var(--muted)}
    .image-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
    .image-row img{border-radius:18px;border:1px solid var(--line);background:#fff}
    .caption{margin-top:8px;color:var(--muted);font-size:13px}
    @media (max-width: 960px){
      .hero-grid,.grid-4,.grid-3,.articles,.footer-top,.split,.image-row{grid-template-columns:1fr}
      .nav-links{display:none}
      .menu-toggle{display:inline-grid}
      .drawer{display:none;padding:0 0 14px}
      .drawer.open{display:block}
      .nav-wrap{padding-bottom:10px}
      .hero-meta{grid-template-columns:1fr}
      .form-grid{grid-template-columns:1fr}
    }
    @media (max-width: 640px){
      .container{width:min(var(--container),calc(100% - 22px))}
      .hero-copy,.hero-side,.card,.panel,.faq-item,.review,.timeline li,.article,.metric,.price,.compare,.form-wrap{padding:16px}
      h1{font-size:28px}
      .section h2{font-size:24px}
      .nav{padding:12px 0}
      .brand strong{font-size:15px}
      .float-tools{right:12px;bottom:12px}
    }
    .reveal{opacity:0;transform:translateY(14px);transition:opacity .6s ease,transform .6s ease}
    .reveal.show{opacity:1;transform:none}