:root{
      --bg:#f5f8ff;
      --panel:#ffffff;
      --panel-2:#eef4ff;
      --text:#13233d;
      --muted:#5b6780;
      --line:#d8e3f7;
      --brand:#165dff;
      --brand-2:#0d3fb8;
      --accent:#00b3ff;
      --gold:#ffb020;
      --shadow:0 14px 40px rgba(18,58,132,.12);
      --radius:18px;
      --container:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:system-ui,-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(22,93,255,.12), transparent 28%),
        radial-gradient(circle at 85% 10%, rgba(0,179,255,.12), transparent 20%),
        linear-gradient(180deg,#f8fbff 0%, #f4f8ff 100%);
    }
    a{color:var(--brand);text-decoration:none}
    a:hover{color:var(--brand-2)}
    img{display:block;max-width:100%}
    .container{width:min(var(--container), calc(100% - 32px)); margin:0 auto}
    header{position:sticky;top:0;z-index:50;background:rgba(245,248,255,.86);backdrop-filter:blur(12px);border-bottom:1px solid rgba(216,227,247,.8)}
    .topbar{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:10px;background:#fff;border:1px solid var(--line);padding:4px}
    .brand strong{display:block;font-size:18px;line-height:1.1}
    .brand span{display:block;font-size:12px;color:var(--muted);margin-top:3px}
    nav{display:flex;align-items:center;gap:18px;flex-wrap:wrap;justify-content:flex-end}
    nav a{font-size:14px;color:var(--text);padding:8px 10px;border-radius:999px}
    nav a:hover{background:rgba(22,93,255,.08)}
    .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:12px 16px;font-weight:700;transition:.25s ease;cursor:pointer;white-space:nowrap}
    .btn-primary{background:linear-gradient(135deg,var(--brand),var(--accent));color:#fff;box-shadow:0 10px 24px rgba(22,93,255,.22)}
    .btn-primary:hover{transform:translateY(-1px);box-shadow:0 14px 28px rgba(22,93,255,.28);color:#fff}
    .btn-ghost{background:#fff;border-color:var(--line);color:var(--text)}
    .btn-ghost:hover{border-color:#aac1f3;transform:translateY(-1px)}
    .menu-btn{display:none;background:#fff;border:1px solid var(--line);border-radius:12px;padding:10px 12px}
    .hero{padding:34px 0 18px}
    .hero-grid{display:grid;grid-template-columns:1.28fr .72fr;gap:22px;align-items:stretch}
    .hero-main,.hero-side,.panel,.card,.faq-item,.review,.article,.quote,.step,.compare,.timeline-item,.price-card,.service-box,.form-box,.help-box{background:var(--panel);border:1px solid rgba(216,227,247,.95);border-radius:var(--radius);box-shadow:var(--shadow)}
    .hero-main{padding:28px;position:relative;overflow:hidden}
    .hero-main:before{content:"";position:absolute;inset:auto -70px -80px auto;width:260px;height:260px;border-radius:50%;background:radial-gradient(circle, rgba(22,93,255,.18), transparent 65%);pointer-events:none}
    .eyebrow{display:inline-flex;align-items:center;gap:8px;background:rgba(22,93,255,.08);color:var(--brand-2);border:1px solid rgba(22,93,255,.14);padding:8px 12px;border-radius:999px;font-size:13px;font-weight:700}
    h1{margin:16px 0 14px;font-size:clamp(30px,4vw,48px);line-height:1.08;letter-spacing:-.02em}
    .hero p{margin:0;color:var(--muted);font-size:16px;line-height:1.8;max-width:62ch}
    .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:24px}
    .mini{background:linear-gradient(180deg,#fff, #f7fbff);border:1px solid var(--line);border-radius:16px;padding:14px}
    .mini strong{display:block;font-size:20px}
    .mini span{display:block;color:var(--muted);font-size:13px;margin-top:6px;line-height:1.5}
    .hero-side{padding:20px;display:grid;gap:14px}
    .side-stat{padding:16px;border-radius:16px;background:linear-gradient(180deg,#f8fbff,#eef4ff);border:1px solid var(--line)}
    .side-stat strong{display:block;font-size:26px;color:var(--brand-2)}
    .side-stat span{display:block;color:var(--muted);font-size:13px;margin-top:6px;line-height:1.6}
    .section{padding:18px 0}
    .section h2{margin:0 0 14px;font-size:26px}
    .section p.lead{margin:0 0 18px;color:var(--muted);line-height:1.8}
    .grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
    .grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
    .card{padding:18px;transition:transform .2s ease, box-shadow .2s ease}
    .card:hover,.review:hover,.article:hover,.step:hover,.service-box:hover{transform:translateY(-3px)}
    .tag{display:inline-flex;padding:6px 10px;border-radius:999px;background:rgba(22,93,255,.08);color:var(--brand-2);font-size:12px;font-weight:700;margin-bottom:10px}
    .card h3,.review h3,.article h3,.service-box h3,.compare h3,.form-box h3,.help-box h3{margin:0 0 10px;font-size:18px}
    .card p,.review p,.article p,.service-box p,.compare p,.timeline-item p,.help-box p{margin:0;color:var(--muted);line-height:1.75}
    .list{margin:12px 0 0;padding:0;list-style:none;display:grid;gap:10px}
    .list li{display:flex;gap:10px;align-items:flex-start;color:var(--text);line-height:1.6}
    .list li:before{content:"";width:8px;height:8px;border-radius:50%;background:linear-gradient(135deg,var(--brand),var(--accent));margin-top:8px;flex:0 0 auto}
    .feature-strip{display:flex;flex-wrap:wrap;gap:10px}
    .chip{padding:8px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);font-size:13px}
    .workflow{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .step{padding:18px;position:relative}
    .step .num{width:34px;height:34px;border-radius:10px;background:linear-gradient(135deg,var(--brand),var(--accent));color:#fff;display:grid;place-items:center;font-weight:800;margin-bottom:12px}
    .table-wrap{overflow:auto;border-radius:18px;border:1px solid var(--line);background:#fff;box-shadow:var(--shadow)}
    table{width:100%;border-collapse:collapse;min-width:760px}
    th,td{padding:14px 16px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
    th{background:#f4f8ff;font-size:14px}
    td{color:var(--text);font-size:14px;line-height:1.7}
    .score{display:grid;grid-template-columns:1fr 1fr;gap:14px;align-items:stretch}
    .compare{padding:18px}
    .stars{color:#ff9f1c;font-size:20px;letter-spacing:2px}
    .price-card{padding:18px}
    .price{font-size:30px;font-weight:900;color:var(--brand-2)}
    .timeline{display:grid;gap:14px}
    .timeline-item{padding:16px 18px;border-left:4px solid var(--brand)}
    .reviews,.articles,.faq-list,.help-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
    .review,.article{padding:18px}
    .review .meta{display:flex;justify-content:space-between;gap:10px;color:var(--muted);font-size:13px;margin-bottom:10px}
    .faq-item{overflow:hidden}
    .faq-q{width:100%;background:none;border:none;padding:18px;text-align:left;font:inherit;color:var(--text);display:flex;justify-content:space-between;gap:16px;align-items:center;cursor:pointer}
    .faq-q strong{font-size:16px}
    .faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease;padding:0 18px}
    .faq-item.active .faq-a{max-height:180px;padding-bottom:18px}
    .faq-item.active .toggle{transform:rotate(45deg)}
    .form-box{padding:18px}
    .form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
    label{display:block;font-size:13px;font-weight:700;margin:0 0 6px}
    input,select,textarea{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:14px;background:#fff;color:var(--text);font:inherit;outline:none;transition:border-color .2s ease, box-shadow .2s ease}
    input:focus,select:focus,textarea:focus{border-color:#8fb0ff;box-shadow:0 0 0 4px rgba(22,93,255,.1)}
    textarea{min-height:120px;resize:vertical}
    .span-2{grid-column:span 2}
    .footer-top{display:grid;grid-template-columns:1.1fr .9fr;gap:18px;align-items:start}
    footer{margin-top:18px;background:#0f1f3a;color:#e7efff;padding:22px 0 18px}
    footer a{color:#b9d0ff}
    footer .muted{color:#c8d8fb}
    .footer-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;align-items:start}
    .footer-card{background:rgba(255,255,255,.05);border:1px solid rgba(185,208,255,.16);border-radius:18px;padding:16px}
    .footer-links{display:flex;flex-wrap:wrap;gap:10px}
    .footer-links a{padding:7px 10px;border-radius:999px;background:rgba(255,255,255,.06)}
    .floating{position:fixed;right:16px;bottom:16px;z-index:60;display:grid;gap:10px}
    .float-btn{width:50px;height:50px;border-radius:16px;background:linear-gradient(135deg,var(--brand),var(--accent));color:#fff;display:grid;place-items:center;box-shadow:0 10px 24px rgba(22,93,255,.25);font-weight:900}
    .float-panel{position:fixed;right:16px;bottom:78px;z-index:60;width:min(320px,calc(100vw - 32px));background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);padding:14px;display:none}
    .float-panel.show{display:block}
    .img-row{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
    .img-row img,.img-single img{border-radius:18px;border:1px solid var(--line);box-shadow:var(--shadow);width:100%;height:auto}
    .reveal{opacity:0;transform:translateY(14px);transition:.55s ease}
    .reveal.visible{opacity:1;transform:translateY(0)}
    .mobile-only{display:none}
    .desktop-only{display:block}
    .anchor-pad{scroll-margin-top:92px}
    @media (max-width: 980px){
      .hero-grid,.grid-4,.grid-3,.workflow,.reviews,.articles,.faq-list,.help-grid,.footer-top,.footer-grid,.grid-2,.score,.img-row{grid-template-columns:1fr}
      .hero-meta{grid-template-columns:1fr}
      .desktop-only{display:none}
      .mobile-only{display:block}
      nav{display:none;width:100%;padding:10px 0 4px}
      nav.open{display:flex;flex-direction:column;align-items:flex-start}
      .menu-btn{display:inline-flex}
      .topbar{flex-wrap:wrap}
      .span-2{grid-column:span 1}
    }