/* 自由派的前世今生 · 线上展馆 —— 排版样式
   纸色、朱砂、衬线。没有框架，没有花哨动画，像一间安静的老房子。 */

:root {
  --paper: #f4f0e6;
  --paper-deep: #ece6d8;      /* 展品衬底 */
  --ink: #23201a;
  --ink-soft: #4a443a;
  --accent: #a8382a;          /* 朱砂 */
  --accent-dim: #b89a8d;
  --rule: rgba(35, 32, 26, .16);
  --serif: "Noto Serif CJK SC", "Source Han Serif SC", "Source Han Serif CN",
           "Songti SC", "SimSun", "Noto Serif", Georgia, serif;
  --kai: "Kaiti SC", "STKaiti", "KaiTi",
         "Noto Serif CJK SC", "Source Han Serif SC", serif;
}

* { box-sizing: border-box; }

html { font-size: 17px; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  line-height: 1.9;
  -webkit-font-smoothing: antialiased;
}

/* 极淡的纸纹 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: .04;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)' opacity='0.5'/%3E%3C/svg%3E");
}

/* 阅读进度，一条细朱砂线 */
#progress {
  position: fixed;
  top: 0; left: 0;
  height: 2px;
  width: 0;
  background: var(--accent);
  z-index: 5;
}

/* ---------- 展馆导航条 ---------- */

.gallery-nav {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  max-width: 42rem;
  margin: 0 auto;
  padding: 1.2rem 1.25rem 0;
  font-family: var(--kai);
  font-size: .8rem;
  color: var(--ink-soft);
  letter-spacing: .08em;
}
.gallery-nav .loc { white-space: nowrap; }
.gallery-nav a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  white-space: nowrap;
}
.gallery-nav a:hover { border-bottom-color: var(--accent); }

main {
  position: relative;
  z-index: 1;
  max-width: 42rem;
  margin: 0 auto;
  padding: 1.8rem 1.25rem 4.5rem;
}

/* ---------- 题头 ---------- */

header { text-align: center; margin-bottom: 1rem; }

.hall-header { margin: 2.4rem 0 2.8rem; }

.kicker {
  margin: 0 0 .8rem;
  font-size: .78rem;
  letter-spacing: .5em;
  text-indent: .5em;
  color: var(--accent);
}

h1 {
  margin: 0 0 .6rem;
  font-size: clamp(1.9rem, 5vw, 2.7rem);
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: .06em;
}

.subtitle {
  margin: 0 auto 1.2rem;
  max-width: 30rem;
  font-family: var(--kai);
  font-size: 1rem;
  color: var(--ink-soft);
  line-height: 2;
}

.meta {
  margin: 0;
  font-size: .8rem;
  letter-spacing: .1em;
  color: var(--ink-soft);
}

.epigraph {
  margin: 2.8rem auto;
  max-width: 30rem;
  text-align: center;
  font-family: var(--kai);
  color: var(--ink-soft);
  line-height: 2;
}
.epigraph p { margin: 0; }
.epigraph .who {
  margin-top: .6rem;
  font-size: .85rem;
  letter-spacing: .15em;
  color: var(--accent);
}

/* ---------- 正文 ---------- */

section { margin: 3rem 0; }

h2 {
  margin: 0 0 1.4rem;
  padding-bottom: .45rem;
  font-size: 1.32rem;
  font-weight: 700;
  letter-spacing: .1em;
  border-bottom: 1px solid var(--rule);
}

h2 .no {
  margin-right: .55em;
  font-family: var(--kai);
  font-size: 1.45rem;
  font-weight: 400;
  color: var(--accent);
}

p {
  margin: 0 0 1.15em;
  text-align: justify;
  text-indent: 2em;
}

p.lead { text-indent: 0; }

p.lead::first-letter {
  float: left;
  margin: .02em .14em 0 0;
  font-size: 3.3em;
  line-height: .8;
  font-weight: 700;
  color: var(--accent);
}

/* 眉批 */
.note {
  margin: 0 0 1.6em;
  padding-left: 1.1em;
  border-left: 1px solid var(--accent-dim);
  font-family: var(--kai);
  font-size: .88rem;
  line-height: 1.9;
  color: var(--ink-soft);
  text-indent: 0;
}
.note::before { content: "注 "; color: var(--accent); }

/* ---------- 展品柜 ---------- */

.exhibit {
  margin: 2.6rem 0;
  padding: 1.5rem 1.8rem 1.3rem;
  background: var(--paper-deep);
  border: 1px solid var(--rule);
  border-left: 3px solid var(--accent);
}
.exhibit .tag {
  margin: 0 0 .9rem;
  font-size: .72rem;
  letter-spacing: .35em;
  color: var(--accent);
}
.exhibit blockquote {
  margin: 0;
  font-family: var(--kai);
  font-size: 1.12rem;
  line-height: 2.05;
  color: var(--ink);
}
.exhibit .src {
  margin: .9rem 0 0;
  font-size: .8rem;
  color: var(--ink-soft);
  text-align: right;
  text-indent: 0;
}

/* 人物小传 */
.person {
  margin: 1.6rem 0;
  padding-left: 1.1em;
  border-left: 1px solid var(--accent-dim);
}
.person .name { font-weight: 700; letter-spacing: .05em; }
.person .years {
  font-family: var(--kai);
  font-size: .88rem;
  color: var(--ink-soft);
  margin-left: .5em;
}
.person p {
  margin: .35em 0 0;
  text-indent: 0;
  font-size: .92rem;
  color: var(--ink-soft);
}

/* ---------- 大厅：展厅导览 ---------- */

.guide {
  list-style: none;
  margin: 2rem 0 0;
  padding: 0;
}
.guide li { border-bottom: 1px solid var(--rule); }
.guide a {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  padding: .95rem .2rem;
  text-decoration: none;
  color: var(--ink);
}
.guide .gno { font-family: var(--kai); color: var(--accent); flex-shrink: 0; }
.guide .gname { font-weight: 700; letter-spacing: .05em; flex-shrink: 0; }
.guide .gdesc {
  margin-left: auto;
  text-align: right;
  max-width: 52%;
  font-size: .84rem;
  color: var(--ink-soft);
}
.guide .arrow { color: var(--accent); flex-shrink: 0; }
.guide a:hover .gname { color: var(--accent); }

/* ---------- 时间走廊 ---------- */

.corridor {
  position: relative;
  list-style: none;
  margin: 2.2rem 0 0;
  padding: 0 0 0 2.2rem;
}
.corridor::before {
  content: "";
  position: absolute;
  left: .55rem; top: .5rem; bottom: .5rem;
  width: 1px;
  background: var(--accent-dim);
}
.corridor li { position: relative; margin: 0 0 1.7rem; }
.corridor .dot {
  position: absolute;
  left: -2.2rem; top: .5em;
  width: .6rem; height: .6rem;
  border-radius: 50%;
  background: var(--accent);
}
.corridor .yr {
  font-family: var(--kai);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: .12em;
  color: var(--accent);
}
.corridor .ev {
  display: block;
  margin-top: .25em;
  font-size: .92rem;
  color: var(--ink-soft);
}

/* ---------- 资料室 ---------- */

.books {
  list-style: none;
  margin: 1.2rem 0 0;
  padding: 0;
}
.books li {
  display: flex;
  justify-content: space-between;
  gap: 1.5rem;
  padding: .45em 0;
  border-bottom: 1px dotted var(--rule);
}
.books .t { transition: color .15s; }
.books li:hover .t { color: var(--accent); }
.books .a {
  flex-shrink: 0;
  font-family: var(--kai);
  color: var(--ink-soft);
}

/* ---------- 观展动线 ---------- */

.path {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin: 3.4rem 0 0;
  padding-top: 1.2rem;
  border-top: 1px solid var(--rule);
  font-family: var(--kai);
  font-size: .9rem;
}
.path a {
  color: var(--ink-soft);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
.path a:hover { color: var(--accent); border-bottom-color: var(--accent); }
.path .prev { text-align: left; }
.path .next { text-align: right; }

/* ---------- 页脚 ---------- */

footer {
  margin-top: 4.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--rule);
  text-align: center;
  font-family: var(--kai);
  font-size: .82rem;
  line-height: 2;
  color: var(--ink-soft);
}
footer p { margin: 0; text-indent: 0; }

/* ---------- 字号调节 ---------- */

.type {
  position: fixed;
  right: .9rem;
  bottom: .9rem;
  z-index: 6;
  display: flex;
  gap: .3rem;
  opacity: .45;
  transition: opacity .2s;
}
.type:hover { opacity: 1; }
.type button {
  width: 2rem;
  height: 2rem;
  border: 1px solid var(--rule);
  border-radius: 2px;
  background: transparent;
  color: var(--ink);
  font-family: var(--serif);
  font-size: .78rem;
  cursor: pointer;
}
.type button:hover { border-color: var(--accent); color: var(--accent); }

/* ---------- 小屏 ---------- */

@media (max-width: 480px) {
  html { font-size: 16px; }
  main { padding: 1.4rem 1.1rem 4rem; }
  .books li { flex-direction: column; gap: .1rem; }
  .guide a { flex-wrap: wrap; gap: .2rem .8rem; }
  .guide .gdesc { max-width: none; text-align: left; margin-left: 2.2rem; }
  .path { flex-wrap: wrap; }
}