:root {
    --bg: #f8f9fa;
    --surface: #ffffff;
    --text: #1a1a2e;
    --text-secondary: #5f5e6a;
    --text-muted: #8a8994;
    --border: #e8e8ed;
    --blue: #3b82f6;
    --radius: 10px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; background: var(--bg); color: var(--text); line-height: 1.6; }
.container { max-width: 960px; margin: 0 auto; padding: 0 20px; }

/* Header */
header { border-bottom: 1px solid var(--border); background: var(--surface); position: sticky; top: 0; z-index: 100; }
.header-inner { display: flex; align-items: center; justify-content: space-between; padding: 14px 0; }
.logo { font-size: 22px; font-weight: 700; color: var(--text); text-decoration: none; }
.logo span { color: var(--blue); }
nav { display: flex; gap: 18px; flex-wrap: wrap; }
nav a { font-size: 14px; color: var(--text-secondary); font-weight: 500; text-decoration: none; transition: color 0.15s; }
nav a:hover { color: var(--text); }

/* Footer */
footer { margin-top: 64px; padding: 32px 0; border-top: 1px solid var(--border); text-align: center; }
footer p { font-size: 13px; color: var(--text-muted); }
.footer-links { display: flex; gap: 20px; justify-content: center; margin-bottom: 12px; flex-wrap: wrap; }
.footer-links a { color: var(--text-secondary); font-size: 13px; text-decoration: none; }
.footer-links a:hover { color: var(--blue); }

/* Breadcrumb */
.breadcrumb { display: flex; gap: 8px; font-size: 14px; padding: 16px 0; color: var(--text-muted); }
.breadcrumb a { color: var(--blue); text-decoration: none; }

/* Responsive */
@media (max-width: 600px) {
    .header-inner { flex-direction: column; gap: 10px; }
    nav { gap: 12px; }
}