/* 本站专属主题：蓝 · Apple 风 · grid */
:root{
  --bg:#ffffff;
  --bg-soft:#f5f5f7;
  --card:#ffffff;
  --text:#1d1d1f;
  --text-soft:#6e6e73;
  --border:rgba(0,0,0,.08);
  --primary:#0071e3;
  --primary-dark:#0077ed;
  --primary-soft:rgba(0,0,0,.05);
  --deep:#0b3d91;
  --grad:linear-gradient(135deg,#0071e3,#5e5ce6);
  --grad-warm:linear-gradient(135deg,#0071e3,#5e5ce6);
  --grad-green:linear-gradient(135deg,#0071e3,#5e5ce6);
  --radius:18px;
  --radius-sm:12px;
  --radius-lg:22px;
  --font: -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  --font-head: -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  --shadow: 0 1px 3px rgba(0,0,0,.05),0 8px 24px rgba(0,0,0,.06);
  --shadow-md: 0 4px 12px rgba(0,0,0,.07),0 18px 44px rgba(0,0,0,.09);
  --ring: 0 0 0 4px rgba(0,0,0,.12);
}
body{background:var(--bg);color:var(--text);font-family:var(--font)}
.site-header{background:var(--card);border-bottom:1px solid var(--border);backdrop-filter:saturate(180%) blur(18px)}
.brand-mark{background:var(--grad)}
.btn-primary{background:var(--primary);border-color:var(--primary)}
.btn-primary:hover{background:var(--primary-dark);border-color:var(--primary-dark)}
.badge,.badge-hot{background:var(--grad);color:#fff}
.cat-circle{background:var(--primary-soft);color:var(--primary)}
a:hover,.card-title:hover{color:var(--primary)}

.grid{gap:18px}
.card:hover{transform:translateY(-2px)}