/* =============================================================
   布局：头部导航 / 页脚 / 各页面模块
   ============================================================= */

/* ---------- 头部 ---------- */
.site-header {
  border-bottom: var(--line);
  padding: 1.2rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.brand-title {
  font-size: 1.6rem;
  letter-spacing: .35em;
}

.brand-motto {
  font-size: .82rem;
  color: var(--ink-mid);
  letter-spacing: .25em;
  margin-top: .3rem;
}

.nav-toggle {
  display: none;
  background: none;
  border: var(--line);
  color: var(--ink-black);
  padding: .3rem .7rem;
  font-size: 1.1rem;
  line-height: 1;
}

.site-nav { display: flex; gap: 1.6rem; flex-wrap: wrap; }

.site-nav a {
  letter-spacing: .15em;
  padding: .2rem 0;
  border-bottom: 1px solid transparent;
  color: var(--ink-deep);
}

.site-nav a:hover { color: var(--ink-black); border-bottom-color: var(--ink-black); }

.site-nav a.active { color: var(--ink-black); border-bottom-color: var(--ink-black); }

/* ---------- 主体 ---------- */
main { flex: 1; }

.page { max-width: 1200px; margin: 0 auto; padding: 3rem 2rem; }

.page-heading {
  text-align: center;
  font-size: 1.5rem;
  letter-spacing: .4em;
  margin-bottom: 2.5rem;
  padding-bottom: 1rem;
  border-bottom: var(--line);
}

/* ---------- 页脚 ---------- */
.site-footer {
  border-top: var(--line);
  text-align: center;
  padding: 1.6rem 2rem;
  color: var(--ink-mid);
  letter-spacing: .3em;
  font-size: .9rem;
}

/* ---------- 谱序 ---------- */
.preface-wrap {
  max-width: 720px;
  margin: 0 auto;
  border-left: 1px solid var(--ink-line);
  border-right: 1px solid var(--ink-line);
  padding: 2rem 3rem;
}

.preface-title {
  text-align: center;
  font-size: 1.6rem;
  letter-spacing: .5em;
  margin-bottom: 2.5rem;
}

.preface-body {
  text-align: justify;
  text-justify: inter-ideograph;
  color: var(--ink-deep);
  line-height: 2.1;
  font-size: 1rem;
  text-indent: 2em;
}

.preface-era {
  text-align: right;
  margin-top: 2.5rem;
  color: var(--ink-mid);
  letter-spacing: .2em;
  font-size: .9rem;
}

/* ---------- 先祖列传 ---------- */
.bio-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}

.bio-card {
  border: var(--line);
  background: var(--paper-card);
  padding: 1.6rem 1.8rem;
}

.bio-card h3 { font-size: 1.15rem; letter-spacing: .2em; }

.bio-sub { color: var(--ink-mid); font-size: .82rem; margin: .4rem 0 1rem; letter-spacing: .1em; }

.bio-text { color: var(--ink-deep); text-align: justify; }

/* ---------- 字辈排行 ---------- */
.zibei-poem {
  max-width: 640px;
  margin: 0 auto;
  text-align: center;
}

.zibei-line {
  font-size: 1.5rem;
  letter-spacing: .9em;
  line-height: 2.4;
}

/* ---------- 修谱记事（时间线） ---------- */
.timeline {
  max-width: 760px;
  margin: 0 auto;
  position: relative;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 5px;
  top: 0;
  bottom: 0;
  width: 1px;
  background: var(--ink-line);
}

.timeline-item { position: relative; padding-left: 2rem; margin-bottom: 2rem; }

.timeline-dot {
  position: absolute;
  left: 0;
  top: .4rem;
  width: 11px;
  height: 11px;
  background: var(--ink-black);
  border-radius: 50%;
}

.timeline-year { color: var(--ink-mid); font-size: .85rem; letter-spacing: .1em; }

.timeline-title { font-size: 1.1rem; letter-spacing: .15em; margin: .2rem 0 .4rem; }

.timeline-tag {
  display: inline-block;
  font-size: .72rem;
  border: var(--line);
  padding: .05rem .5rem;
  margin-left: .6rem;
  color: var(--ink-mid);
  letter-spacing: .1em;
  vertical-align: middle;
}

.timeline-detail { color: var(--ink-deep); }

/* ---------- 详情弹窗 ---------- */
.modal-mask {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, .45);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 1rem;
}

.modal-card {
  background: var(--paper);
  border: 1px solid var(--ink-black);
  max-width: 460px;
  width: 100%;
  padding: 2rem 2.2rem;
  position: relative;
  max-height: 86vh;
  overflow: auto;
}

.modal-close {
  position: absolute;
  top: .5rem;
  right: .8rem;
  background: none;
  border: none;
  font-size: 1.6rem;
  color: var(--ink-mid);
  line-height: 1;
}

.modal-close:hover { color: var(--ink-black); }

.modal-name { text-align: center; font-size: 1.4rem; letter-spacing: .3em; }

.modal-gen { text-align: center; color: var(--ink-mid); font-size: .85rem; margin: .4rem 0 1.4rem; letter-spacing: .15em; }

.modal-info { display: grid; grid-template-columns: 4.5em 1fr; row-gap: .6rem; column-gap: 1rem; }

.modal-info dt { color: var(--ink-mid); text-align: right; }

.modal-info dd { color: var(--ink-deep); }

/* ---------- 响应式 ---------- */
@media (max-width: 768px) {
  .nav-toggle { display: inline-block; }

  .site-nav {
    display: none;
    width: 100%;
    flex-direction: column;
    gap: .6rem;
  }

  .site-nav.open { display: flex; }

  .page { padding: 2rem 1rem; }

  .preface-wrap { padding: 1.5rem 1.4rem; }

  .bio-grid { grid-template-columns: 1fr; }

  .zibei-line { font-size: 1.1rem; letter-spacing: .5em; }
}