@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@400;700&family=Noto+Sans+SC:wght@300;400&family=Fraunces:ital,wght@1,400&family=JetBrains+Mono:wght@400&display=swap');

:root {
  --paper:      #F0EDE4;
  --ink:        #14110F;
  --vermillion: #C8412C;
  --stone:      #8B8478;
  --hairline:   #DDD8CD;
  --ink-soft:   rgba(20, 17, 15, 0.7);
  --ink-faint:  rgba(20, 17, 15, 0.18);

  --serif-zh:    'Noto Serif SC', 'Songti SC', serif;
  --sans-zh:     'Noto Sans SC', -apple-system, sans-serif;
  --italic-en:   'Fraunces', Georgia, serif;
  --mono:        'JetBrains Mono', ui-monospace, monospace;

  --max-content: 1200px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans-zh);
  font-weight: 300;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

.zh-serif  { font-family: var(--serif-zh); font-weight: 700; }
.zh-sans   { font-family: var(--sans-zh); font-weight: 300; }
.en-italic { font-family: var(--italic-en); font-style: italic; }
.mono      { font-family: var(--mono); letter-spacing: 0.06em; }

.hairline-top    { border-top: 0.5px solid var(--hairline); }
.hairline-bottom { border-bottom: 0.5px solid var(--hairline); }

.container {
  max-width: var(--max-content);
  margin: 0 auto;
  padding: 0 32px;
}

.label-mono {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--stone);
  letter-spacing: 0.18em;
}

.cta-vermillion {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
  background: var(--vermillion);
  color: var(--paper);
  font-family: var(--sans-zh);
  font-weight: 400;
  font-size: 14px;
  cursor: pointer;
  border: 0;
  text-decoration: none;
  transition: opacity 0.2s;
}
.cta-vermillion:hover { opacity: 0.9; }

/* 顶 nav */
.nav-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 32px;
  border-bottom: 0.5px solid var(--hairline);
  background: var(--paper);
}
.nav-bar__brand {
  display: flex; align-items: center; gap: 11px;
}
.nav-bar__brand .char {
  font-family: var(--serif-zh);
  font-size: 24px;
  font-weight: 700;
}
.nav-bar__brand .dot {
  width: 4px; height: 4px;
  background: var(--vermillion);
  border-radius: 50%;
}
.nav-bar__right {
  display: flex; gap: 22px; align-items: center;
}

/* footer */
.footer {
  background: var(--ink);
  color: var(--paper);
  padding: 50px 32px 28px;
}
.footer__grid {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 24px;
  padding-bottom: 32px;
  border-bottom: 0.5px solid #2C2823;
}
.footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 22px;
  flex-wrap: wrap;
  gap: 12px;
}
.footer__bottom .mono {
  font-size: 9px;
  color: var(--stone);
}

/* 移动响应 */
@media (max-width: 768px) {
  .container { padding: 0 20px; }
  .nav-bar { padding: 14px 20px; }

  /* 2-col grid → 单列 */
  .grid-2col {
    grid-template-columns: 1fr !important;
  }
  .grid-2col .col-visual {
    min-height: 280px;
  }
}