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p{color:var(--muted);margin:0;font-size:.86rem;line-height:1.45}.breadcrumbs{color:var(--muted);margin:22px 0 10px;font-size:.86rem}.breadcrumbs ol{flex-wrap:wrap;gap:6px;margin:0;padding:0;list-style:none;display:flex}.breadcrumbs li:not(:last-child):after{content:"/";color:var(--border-strong);margin-left:6px}.breadcrumbs a{color:var(--muted)}.page-head{align-items:center;gap:16px;margin-bottom:22px;display:flex}.page-head .cat-icon{border-radius:16px;width:54px;height:54px}.page-head h1{margin:0}.page-head p{color:var(--muted);margin:4px 0 0}.content-grid{grid-template-columns:minmax(0,1fr) 300px;align-items:start;gap:28px;margin-top:34px;display:grid}.article{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:28px}.article h2{margin-top:1.4em}.article h2:first-child{margin-top:0}.article p,.article li{color:var(--text-2)}.article code,.formula{font-family:var(--mono);font-size:.9em}.formula{background:var(--surface-2);border:1px solid 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button[aria-checked=true]{background:var(--surface);color:var(--text);box-shadow:var(--shadow-sm)}.seg button:hover:not([aria-checked=true]){color:var(--text)}.check{cursor:pointer;color:var(--text-2);-webkit-user-select:none;user-select:none;align-items:center;gap:10px;font-size:.93rem;display:flex}.check input{width:18px;height:18px;accent-color:var(--primary)}.btn{border:1px solid var(--border-strong);background:var(--surface);height:44px;color:var(--text);cursor:pointer;white-space:nowrap;border-radius:11px;justify-content:center;align-items:center;gap:8px;padding:0 18px;font-weight:650;transition:background .15s,transform 50ms,border-color .15s;display:inline-flex}.btn:hover{background:var(--surface-2);text-decoration:none}.btn:active{transform:translateY(1px)}.btn-primary{background:var(--primary);border-color:var(--primary);color:var(--primary-ink)}.btn-primary:hover{background:var(--primary-600);border-color:var(--primary-600)}.btn-ghost{color:var(--muted);background:0 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print{.site-header,.site-footer,.side-card,.btn,.header-actions{display:none!important}body{background:#fff}.panel,.article{box-shadow:none;border-color:#ccc}}