:root { font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif; color: #29393d; background: #f7f8fa; font-synthesis: none; }
* { box-sizing: border-box; }
body { margin: 0; }
.site-shell { min-height: 100vh; background: #f7f8fa; }
.site-header { background: rgba(255,255,255,.88); border-bottom: 1px solid #dceeea; backdrop-filter: blur(16px); }
.header-inner { max-width: 1120px; min-height: 76px; margin: auto; padding: 0 28px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 11px; text-decoration: none; font-size: 20px; font-weight: 900; letter-spacing: .06em; white-space: nowrap; color: #29383d; }
.brand-mark { display: block; width: 36px; height: 36px; flex: none; }
.brand-accent { color: #398f88; margin-left: 4px; }
.site-nav { display: flex; gap: 6px; }
.site-nav a { text-decoration: none; padding: 10px 17px; border-radius: 12px; color: #60777b; font-weight: 650; transition: background .2s, color .2s, transform .2s; white-space: nowrap; }
.site-nav a:hover { color: #087f88; background: #e5f7f4; transform: translateY(-1px); }
.site-nav a.active { color: #087f88; background: #def5f0; }
.main-content { max-width: 1120px; min-height: calc(100vh - 76px); margin: auto; padding: 42px 28px 72px; }
@media (max-width: 640px) {
  .header-inner { min-height: 68px; padding: 13px 18px; flex-wrap: wrap; gap: 12px; }
  .brand { font-size: 17px; }
  .brand-mark { display: block; width: 36px; height: 36px; flex: none; }
  .site-nav { width: 100%; justify-content: space-between; gap: 2px; }
  .site-nav a { padding: 8px 10px; font-size: 13px; }
  .main-content { padding: 28px 18px 54px; }
}
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; } }