/* 滚雪球 - 编辑出版风格 */
:root {
  --ink: #1a1a2e;        /* 墨蓝（背景） */
  --paper: #f5f0e8;      /* 羊皮纸米白 */
  --gold: #b8860b;       /* 暗金（标题/强调） */
  --crimson: #8b2635;    /* 深红（引言/金句） */
  --gray: #6c757d;       /* 中灰（注释） */
  --line: rgba(26, 26, 46, .12);
}

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

body {
  font-family: 'Cormorant Garamond', 'Noto Serif SC', 'Songti SC', 'STSong', Georgia, serif;
  background: var(--paper);
  color: var(--ink);
  line-height: 1.9;
}

/* ===== 首页 Hero ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  background: var(--ink);
  color: var(--paper);
  overflow: hidden;
  padding: 60px 20px;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 120%, rgba(184,134,11,.15), transparent 60%),
              linear-gradient(180deg, rgba(26,26,46,.6), rgba(26,26,46,.9));
}
.hero-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .45;
  filter: grayscale(1) contrast(1.1);
}
.hero-content { position: relative; z-index: 2; max-width: 900px; }
.hero-kicker {
  font-size: .85rem;
  letter-spacing: .5em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 28px;
  font-family: 'Cormorant Garamond', serif;
}
.hero h1 {
  font-size: clamp(3rem, 9vw, 6.5rem);
  font-weight: 700;
  letter-spacing: .08em;
  margin-bottom: 24px;
  text-shadow: 0 4px 40px rgba(0,0,0,.5);
}
.hero-sub {
  font-size: clamp(1rem, 2vw, 1.3rem);
  color: rgba(245,240,232,.85);
  max-width: 560px;
  margin: 0 auto 40px;
  font-style: italic;
}
.hero-meta {
  font-size: .9rem;
  color: rgba(245,240,232,.6);
  letter-spacing: .2em;
}
.scroll-hint {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  color: rgba(245,240,232,.6);
  font-size: .8rem;
  letter-spacing: .3em;
  animation: float 2.5s ease-in-out infinite;
}
@keyframes float {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

/* ===== 目录 ===== */
.toc {
  max-width: 1100px;
  margin: 0 auto;
  padding: 90px 24px;
}
.toc-title {
  text-align: center;
  font-size: 2.2rem;
  margin-bottom: 12px;
  letter-spacing: .2em;
}
.toc-desc {
  text-align: center;
  color: var(--gray);
  margin-bottom: 60px;
  font-style: italic;
}
.part {
  margin-bottom: 48px;
  border-top: 2px solid var(--gold);
  padding-top: 32px;
}
.part-head {
  display: flex;
  align-items: baseline;
  gap: 16px;
  margin-bottom: 20px;
}
.part-no {
  font-size: .9rem;
  color: var(--gold);
  letter-spacing: .3em;
  text-transform: uppercase;
}
.part-name {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: .1em;
}
.chapter-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 8px 32px; }
.chapter-list a {
  color: var(--ink);
  text-decoration: none;
  padding: 8px 12px;
  border-radius: 4px;
  font-size: 1rem;
  display: flex;
  gap: 12px;
  transition: background .2s;
}
.chapter-list a:hover { background: rgba(184,134,11,.1); }
.ch-no { color: var(--gold); min-width: 28px; font-variant-numeric: tabular-nums; }

/* ===== 金句轮播（首页） ===== */
.quotes {
  background: var(--ink);
  color: var(--paper);
  padding: 80px 24px;
  text-align: center;
}
.quotes-title { font-size: 1.4rem; letter-spacing: .3em; color: var(--gold); margin-bottom: 48px; }
.quote-block { max-width: 700px; margin: 0 auto; font-size: 1.35rem; font-style: italic; line-height: 2; }
.quote-src { margin-top: 20px; font-size: .9rem; color: rgba(245,240,232,.5); font-style: normal; letter-spacing: .15em; }

/* ===== 内容页 ===== */
.topbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  height: 52px;
  backdrop-filter: blur(8px);
}
.topbar a {
  color: var(--ink);
  text-decoration: none;
  font-size: .9rem;
  letter-spacing: .15em;
}
.topbar .brand { font-weight: 700; }
.topbar .nav-links { display: flex; gap: 24px; }

.layout {
  max-width: 1400px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 260px 1fr 240px;
  gap: 32px;
  padding: 40px 24px;
  min-height: calc(100vh - 52px);
}

/* 左栏目录 */
.sidebar {
  position: sticky;
  top: 80px;
  align-self: start;
  max-height: calc(100vh - 100px);
  overflow-y: auto;
  font-size: .9rem;
}
.sidebar h3 { font-size: .8rem; letter-spacing: .2em; color: var(--gray); margin-bottom: 16px; text-transform: uppercase; }
.side-part { margin-bottom: 18px; }
.side-part-name { color: var(--gold); font-weight: 700; margin-bottom: 6px; letter-spacing: .08em; }
.side-chapter a { color: var(--ink); text-decoration: none; display: block; padding: 3px 0 3px 12px; border-left: 1px solid var(--line); font-size: .88rem; }
.side-chapter a:hover, .side-chapter a.active { border-left-color: var(--gold); color: var(--gold); }
.side-chapter a.active { font-weight: 700; }

/* 中栏正文 */
.content { max-width: 760px; }
.chap-head { margin-bottom: 40px; padding-bottom: 24px; border-bottom: 2px solid var(--gold); }
.chap-title {
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 12px;
  letter-spacing: .04em;
}
.chap-subtitle { color: var(--gray); font-size: .95rem; letter-spacing: .2em; }
.para { margin-bottom: 22px; font-size: 1.05rem; text-align: justify; }
.para-dropcap::first-letter {
  font-size: 3.2em;
  float: left;
  line-height: .9;
  padding-right: 10px;
  color: var(--gold);
  font-weight: 700;
}

/* 金句块 */
.quote-card {
  margin: 36px 0;
  padding: 32px 36px;
  background: rgba(184,134,11,.06);
  border-left: 4px solid var(--gold);
  font-style: italic;
  font-size: 1.15rem;
  line-height: 2;
}
.quote-card .q-src { display: block; margin-top: 14px; font-style: normal; font-size: .85rem; color: var(--gray); }

/* 注释块 */
.annotation {
  margin: 28px 0;
  padding: 24px;
  background: rgba(139,38,53,.04);
  border: 1px solid rgba(139,38,53,.15);
  border-radius: 6px;
  font-size: .92rem;
}
.annotation-title { color: var(--crimson); font-weight: 700; margin-bottom: 10px; letter-spacing: .15em; font-size: .8rem; }

/* 右栏 */
.aside {
  position: sticky;
  top: 80px;
  align-self: start;
  font-size: .85rem;
}
.aside-box {
  background: rgba(26,26,46,.03);
  border-radius: 8px;
  padding: 20px;
  margin-bottom: 20px;
}
.aside-box h4 { font-size: .8rem; letter-spacing: .2em; color: var(--gold); margin-bottom: 12px; text-transform: uppercase; }
.aside-box p { color: var(--gray); line-height: 1.8; }

/* 翻页导航 */
.page-nav {
  display: flex;
  justify-content: space-between;
  margin-top: 60px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}
.page-nav a {
  text-decoration: none;
  color: var(--ink);
  font-size: .95rem;
  padding: 12px 20px;
  border: 1px solid var(--line);
  border-radius: 4px;
  transition: all .2s;
}
.page-nav a:hover { border-color: var(--gold); color: var(--gold); }
.page-nav .next { margin-left: auto; }

/* 微信读书 */
.weread {
  max-width: 1100px;
  margin: 0 auto;
  padding: 80px 24px;
}
.weread-title { text-align: center; font-size: 2rem; letter-spacing: .2em; margin-bottom: 48px; }
.weread-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 20px; }
.weread-card {
  background: rgba(26,26,46,.03);
  border-radius: 8px;
  padding: 24px;
  border: 1px solid var(--line);
}
.weread-card .stars { color: var(--gold); letter-spacing: .2em; margin-bottom: 8px; }
.weread-card .text { font-size: .95rem; line-height: 1.8; margin-bottom: 12px; }
.weread-card .meta { font-size: .8rem; color: var(--gray); }

/* 底部 */
.footer {
  text-align: center;
  padding: 48px 24px;
  color: var(--gray);
  font-size: .85rem;
  border-top: 1px solid var(--line);
}

/* 手机 */
@media (max-width: 1024px) {
  .layout { grid-template-columns: 1fr; padding: 24px 16px; }
  .sidebar { display: none; }
  .aside { display: none; }
  .topbar .nav-links span.only-desktop { display: none; }
  .hero { min-height: 90vh; padding: 40px 16px; }
  .chapter-list { grid-template-columns: 1fr; }
}

/* 磨砂底栏（手机） */
.mobile-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  display: none;
  background: rgba(245,240,232,.92);
  backdrop-filter: blur(12px);
  border-top: 1px solid var(--line);
  padding: 10px 20px;
  z-index: 200;
}
@media (max-width: 1024px) {
  .mobile-bar { display: flex; justify-content: space-between; align-items: center; }
  body { padding-bottom: 60px; }
}
.mobile-bar a {
  color: var(--ink);
  text-decoration: none;
  font-size: .9rem;
  padding: 6px 14px;
  border-radius: 4px;
  background: rgba(184,134,11,.1);
}