:root {
  --brand-ink: #1e4d42;
  --brand-ink-deep: #153a32;
  --brand-seal: #a64332;
  --brand-seal-line: #ecd0b1;
  --brand-brass: #b08a4a;
  --paper: #f6f2e8;
  --paper-warm: #fffdf8;
  --ink: #1c2521;
  --ink-secondary: #5e6b64;
  --ink-muted: #8a948e;
  --line: #e4ded2;
  --sage: #6f857c;
  --success: #2f7d5c;
  --warning: #c17a2b;
  --danger: #a64332;
  --info: #3e6b7a;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  background: var(--paper);
  color: var(--ink);
  font-family:
    'Noto Sans SC', 'Source Han Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

.brand-title {
  font-family: 'Noto Serif SC', 'Source Han Serif SC', 'Songti SC', serif !important;
  font-weight: 600 !important;
  letter-spacing: 0.04em;
}

.site-shell {
  min-height: 100vh;
  background: var(--paper);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  height: 72px;
  padding: 0;
  background: rgba(255, 253, 248, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1280px;
  height: 100%;
  margin: 0 auto;
  padding: 0 24px;
  gap: 24px;
}

.site-brand {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 30px;
  margin-right: auto;
  color: var(--ink-secondary);
  font-size: 14px;
}

.site-nav a {
  position: relative;
  padding: 6px 0;
  transition: color 160ms ease;
}

.site-nav a:hover {
  color: var(--brand-ink);
}

.site-nav a::after {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 1px;
  background: var(--brand-seal);
  content: '';
  opacity: 0;
  transform: scaleX(0.6);
  transition:
    opacity 160ms ease,
    transform 160ms ease;
}

.site-nav a:hover::after {
  opacity: 1;
  transform: scaleX(1);
}

.site-content {
  min-height: calc(100vh - 72px - 140px);
  background: var(--paper);
}

.site-footer {
  padding: 0;
  background: var(--paper-warm);
  border-top: 1px solid var(--line);
  color: var(--ink-secondary);
}

.site-footer__inner {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  max-width: 1280px;
  margin: 0 auto;
  padding: 34px 24px;
  gap: 24px;
}

.site-footer__muted {
  margin-top: 8px;
  color: var(--ink-muted);
  font-size: 12px;
}