/* ==========================================================================
   《东周列国志》宣讲站 —— 视觉基座
   纸·墨·朱三色体系：宣纸底、松烟墨、朱砂印
   ========================================================================== */

:root {
  --paper: #f5efe0;          /* 宣纸 */
  --paper-deep: #ece3cd;     /* 陈纸 */
  --paper-shadow: #e2d7bc;
  --ink: #2b2620;            /* 松烟墨 */
  --ink-soft: #57503f;
  --ink-faint: #8a8172;
  --cinnabar: #a63a2b;       /* 朱砂 */
  --cinnabar-deep: #7f2b1f;
  --azure: #2f5d6b;          /* 黛青 */
  --gold: #8a6d3b;           /* 秋香金 */
  --line: #c9bda0;
  --serif: "Noto Serif CJK SC", "Noto Serif SC", "Source Han Serif SC",
           "Songti SC", SimSun, "STSong", serif;
  --kai: "Kaiti SC", KaiTi, "STKaiti", "AR PL UKai CN", var(--serif);
  --maxw: 1060px;
}

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

html { -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--serif);
  color: var(--ink);
  background-color: var(--paper);
  /* 纸纹：细密横纹 + 四角晕染 */
  background-image:
    repeating-linear-gradient(0deg, rgba(87, 80, 63, .022) 0 1px, transparent 1px 4px),
    radial-gradient(1200px 500px at 12% -8%, rgba(138, 109, 59, .06), transparent 60%),
    radial-gradient(1000px 600px at 100% 108%, rgba(47, 93, 107, .05), transparent 55%);
  line-height: 1.9;
  font-size: 17px;
}

a { color: var(--cinnabar); text-decoration: none; }
a:hover { color: var(--cinnabar-deep); text-decoration: underline; text-underline-offset: 3px; }

::selection { background: rgba(166, 58, 43, .18); }

/* ---------- 顶栏 ---------- */
.masthead {
  position: sticky; top: 0; z-index: 40;
  background: rgba(245, 239, 224, .93);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.masthead-inner {
  max-width: var(--maxw); margin: 0 auto; padding: 0 22px;
  display: flex; align-items: center; gap: 26px; height: 62px;
}
.brand { display: flex; align-items: center; gap: 12px; color: var(--ink); }
.brand:hover { text-decoration: none; }
.brand-seal {
  width: 40px; height: 40px; flex: none;
  border-radius: 7px;
  background: linear-gradient(160deg, #b3402e, #8a2d20);
  color: #f7ecd8;
  display: grid; place-items: center;
  font-family: var(--kai);
  font-size: 17px; line-height: 1.05; letter-spacing: 0;
  box-shadow: inset 0 0 0 2px rgba(247, 236, 216, .35), 0 2px 6px rgba(43, 38, 32, .25);
}
.brand-name { font-family: var(--kai); font-size: 22px; letter-spacing: 3px; }
.brand-sub { font-size: 11px; letter-spacing: 4px; color: var(--ink-faint); display: block; margin-top: -4px; }
.nav { margin-left: auto; display: flex; gap: 4px; }
.nav a {
  font-family: var(--kai); font-size: 16.5px; letter-spacing: 2px;
  color: var(--ink-soft); padding: 7px 13px; border-radius: 6px;
}
.nav a:hover { color: var(--cinnabar-deep); background: rgba(166, 58, 43, .07); text-decoration: none; }
.nav a[aria-current="page"] { color: var(--cinnabar-deep); background: rgba(166, 58, 43, .1); }

/* ---------- 首页题头 ---------- */
.hero {
  max-width: var(--maxw); margin: 0 auto; padding: 58px 22px 30px;
  display: grid; grid-template-columns: 1.05fr .95fr; gap: 44px; align-items: center;
}
.hero h1 {
  font-family: var(--kai); font-weight: 600;
  font-size: clamp(38px, 5vw, 56px); letter-spacing: 10px; line-height: 1.25;
}
.hero .tagline { font-family: var(--kai); color: var(--ink-soft); font-size: 19px; margin-top: 14px; letter-spacing: 2px; }
.hero .lede { margin-top: 18px; color: var(--ink-soft); max-width: 34em; }
.hero-cta { margin-top: 26px; display: flex; gap: 14px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--kai); font-size: 17px; letter-spacing: 3px;
  padding: 10px 26px; border-radius: 999px; border: 1px solid transparent;
  transition: transform .12s ease, box-shadow .12s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary { background: linear-gradient(160deg, #b3402e, #8a2d20); color: #f7ecd8; box-shadow: 0 3px 10px rgba(166, 58, 43, .35); }
.btn-primary:hover { color: #fff; }
.btn-ghost { border-color: var(--line); color: var(--ink-soft); background: rgba(255, 252, 244, .5); }
.btn-ghost:hover { color: var(--cinnabar-deep); border-color: var(--cinnabar); }
.hero-art { position: relative; }
.hero-art svg { width: 100%; height: auto; display: block; }
.hero-art figcaption {
  position: absolute; right: 2px; bottom: 2px;
  font-family: var(--kai); font-size: 12.5px; color: var(--ink-faint); letter-spacing: 2px;
  background: rgba(245, 239, 224, .85); padding: 2px 10px; border-radius: 999px;
}

/* ---------- 通用版块 ---------- */
.section { max-width: var(--maxw); margin: 0 auto; padding: 40px 22px 26px; }
.section-head { display: flex; align-items: baseline; gap: 16px; margin-bottom: 22px; }
.section-head h2 {
  font-family: var(--kai); font-size: 26px; letter-spacing: 5px; color: var(--ink);
  padding-left: 14px; border-left: 4px solid var(--cinnabar);
}
.section-head .en { color: var(--ink-faint); font-size: 13px; letter-spacing: 3px; }
.section-head .more { margin-left: auto; font-size: 14.5px; }

/* ---------- 数字一览 ---------- */
.stats {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px;
  background: var(--line); border: 1px solid var(--line); border-radius: 10px; overflow: hidden;
}
.stat { background: rgba(255, 252, 244, .72); padding: 20px 12px; text-align: center; }
.stat b { display: block; font-family: var(--kai); font-size: 34px; color: var(--cinnabar); line-height: 1.2; }
.stat span { font-size: 13.5px; color: var(--ink-soft); letter-spacing: 2px; }

/* ---------- 时代轴 ---------- */
.eras { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; }
.era {
  position: relative; background: rgba(255, 252, 244, .72);
  border: 1px solid var(--line); border-radius: 10px; padding: 18px 16px 16px;
}
.era::before {
  content: ""; position: absolute; top: 0; left: 16px; right: 16px; height: 3px;
  border-radius: 0 0 3px 3px; background: var(--era-accent, var(--cinnabar));
}
.era h3 { font-family: var(--kai); font-size: 18.5px; letter-spacing: 2px; margin-bottom: 6px; }
.era .era-span { font-size: 12.5px; color: var(--ink-faint); letter-spacing: 1px; }
.era p { font-size: 14px; color: var(--ink-soft); margin-top: 8px; line-height: 1.75; }

/* ---------- 回目卡片 ---------- */
.chapters-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.chap-card {
  display: block; background: rgba(255, 252, 244, .72);
  border: 1px solid var(--line); border-radius: 10px; padding: 16px 18px 14px;
  color: var(--ink); position: relative; overflow: hidden;
  transition: border-color .15s ease, box-shadow .15s ease, transform .15s ease;
}
.chap-card:hover { text-decoration: none; border-color: var(--cinnabar); box-shadow: 0 6px 18px rgba(43, 38, 32, .1); transform: translateY(-2px); }
.chap-card .num {
  font-family: var(--kai); font-size: 13px; color: var(--cinnabar); letter-spacing: 2px;
}
.chap-card .t { font-family: var(--kai); font-size: 17.5px; line-height: 1.55; margin-top: 4px; letter-spacing: 1px; }
.chap-card .meta { margin-top: 10px; display: flex; gap: 8px; flex-wrap: wrap; }
.tag {
  font-size: 11.5px; letter-spacing: 1.5px; padding: 2px 9px; border-radius: 999px;
  border: 1px solid var(--line); color: var(--ink-soft); background: var(--paper);
}
.tag.on { border-color: rgba(166, 58, 43, .4); color: var(--cinnabar-deep); background: rgba(166, 58, 43, .07); }
.chap-card .arrow { position: absolute; right: 14px; top: 14px; color: var(--line); font-size: 18px; }
.chap-card:hover .arrow { color: var(--cinnabar); }

/* ---------- 编纂进度 ---------- */
.progress-wrap { background: rgba(255, 252, 244, .72); border: 1px solid var(--line); border-radius: 10px; padding: 20px 24px; }
.progress-bar { height: 10px; border-radius: 999px; background: var(--paper-shadow); overflow: hidden; margin: 10px 0 6px; }
.progress-bar i { display: block; height: 100%; background: linear-gradient(90deg, #b3402e, #8a2d20); border-radius: inherit; }

/* ---------- 页脚 ---------- */
.footer {
  margin-top: 56px; border-top: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(236, 227, 205, .5), rgba(236, 227, 205, .85));
}
.footer-inner {
  max-width: var(--maxw); margin: 0 auto; padding: 30px 22px 40px;
  display: flex; gap: 30px; flex-wrap: wrap; justify-content: space-between;
  font-size: 14px; color: var(--ink-soft);
}
.footer .col h4 { font-family: var(--kai); letter-spacing: 3px; font-size: 16px; color: var(--ink); margin-bottom: 8px; }
.footer .col a { color: var(--ink-soft); display: inline-block; margin-right: 14px; }
.footer .note { max-width: 46em; line-height: 1.8; }

/* ==========================================================================
   回目阅读页
   ========================================================================== */
.read-head { max-width: 860px; margin: 0 auto; padding: 44px 22px 8px; text-align: center; }
.crumbs { font-size: 13.5px; color: var(--ink-faint); letter-spacing: 1px; }
.crumbs a { color: var(--ink-faint); }
.read-head .num {
  display: inline-block; margin-top: 14px; font-family: var(--kai);
  color: var(--cinnabar); letter-spacing: 6px; font-size: 15px;
  border: 1px solid rgba(166, 58, 43, .45); border-radius: 999px; padding: 3px 16px;
}
.read-head h1 {
  font-family: var(--kai); font-size: clamp(26px, 4vw, 36px); letter-spacing: 4px;
  margin-top: 14px; line-height: 1.5;
}
.read-head h1 .divider { color: var(--line); margin: 0 10px; font-size: .7em; vertical-align: middle; }
.read-ill { max-width: 860px; margin: 26px auto 0; padding: 0 22px; }
.read-ill svg { width: 100%; height: auto; display: block; border-radius: 12px; border: 1px solid var(--line); background: #f8f3e6; }
.read-ill figcaption { text-align: center; font-family: var(--kai); color: var(--ink-faint); font-size: 13.5px; margin-top: 8px; letter-spacing: 2px; }

/* 阅读模式切换 */
.mode-bar {
  position: sticky; top: 62px; z-index: 30;
  background: rgba(245, 239, 224, .95); backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.mode-bar-inner {
  max-width: 860px; margin: 0 auto; padding: 9px 22px;
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
}
.modes { display: inline-flex; border: 1px solid var(--line); border-radius: 999px; overflow: hidden; background: var(--paper); }
.modes button {
  font-family: var(--kai); font-size: 15px; letter-spacing: 3px;
  border: 0; background: transparent; color: var(--ink-soft);
  padding: 6px 20px; cursor: pointer;
}
.modes button[aria-pressed="true"] { background: var(--cinnabar); color: #f7ecd8; }
.mode-tools { margin-left: auto; display: flex; align-items: center; gap: 10px; font-size: 13px; color: var(--ink-faint); }
.fontsz { display: inline-flex; border: 1px solid var(--line); border-radius: 999px; overflow: hidden; }
.fontsz button { border: 0; background: transparent; color: var(--ink-soft); width: 34px; height: 30px; cursor: pointer; font-size: 14px; }
.fontsz button:hover { background: rgba(166, 58, 43, .08); color: var(--cinnabar-deep); }

/* 正文三模式 */
.reading { max-width: 860px; margin: 0 auto; padding: 34px 22px 10px; }
.para-pair { margin-bottom: 4px; }
.para-orig {
  font-family: var(--kai); font-size: var(--read-fs, 20px); line-height: 2.05;
  color: var(--ink);
}
.para-orig .pnum {
  user-select: none; color: var(--cinnabar); opacity: .55; font-size: .62em;
  margin-right: 10px; letter-spacing: 0; vertical-align: .18em; font-family: var(--serif);
}
.para-trans {
  font-size: calc(var(--read-fs, 20px) * .78); line-height: 1.95;
  color: var(--ink-soft); padding: 2px 0 2px 2.4em; margin: 2px 0 18px;
  border-left: 2px solid rgba(166, 58, 43, .25);
}
.para-trans::before { content: "译"; font-family: var(--kai); color: var(--cinnabar); opacity: .6; font-size: .82em; margin-right: 8px; }

/* 模式：仅原文 */
body.mode-orig .para-trans { display: none; }
body.mode-orig .para-orig { margin-bottom: 16px; }
/* 模式：仅译文 */
body.mode-trans .para-orig { display: none; }
body.mode-trans .para-trans { padding-left: 0; border-left: 0; margin-bottom: 20px; }
body.mode-trans .para-trans::before { content: none; }
/* 模式：对照（默认，无需规则） */

.verse { letter-spacing: 2px; }
.todo-note {
  margin: 26px 0; padding: 18px 22px; border: 1px dashed var(--line); border-radius: 10px;
  background: rgba(255, 252, 244, .6); color: var(--ink-soft); font-size: 15px;
}
.todo-note b { font-family: var(--kai); color: var(--cinnabar-deep); letter-spacing: 2px; }

/* 分析区块 */
.analysis { max-width: 860px; margin: 0 auto; padding: 30px 22px 6px; }
.analysis-head {
  display: flex; align-items: center; gap: 14px; margin-bottom: 20px;
}
.analysis-head::before, .analysis-head::after {
  content: ""; flex: 1; height: 1px; background: var(--line);
}
.analysis-head h2 { font-family: var(--kai); font-size: 24px; letter-spacing: 8px; color: var(--ink); }
.ana-block {
  background: rgba(255, 252, 244, .72); border: 1px solid var(--line);
  border-radius: 10px; padding: 22px 26px; margin-bottom: 16px;
}
.ana-block h3 {
  font-family: var(--kai); font-size: 18.5px; letter-spacing: 3px; color: var(--cinnabar-deep);
  margin-bottom: 10px; display: flex; align-items: center; gap: 10px;
}
.ana-block h3::before { content: ""; width: 8px; height: 8px; background: var(--cinnabar); border-radius: 2px; transform: rotate(45deg); flex: none; }
.ana-block p, .ana-block li { font-size: 15.5px; line-height: 1.95; color: var(--ink-soft); }
.ana-block ul { padding-left: 1.4em; }
.ana-block .people { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px 24px; }
.person b { color: var(--ink); font-family: var(--kai); font-size: 16.5px; letter-spacing: 1px; }

/* 注释 */
.notes-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 6px 28px; }
.note-item { font-size: 14.5px; line-height: 1.8; color: var(--ink-soft); }
.note-item b { color: var(--cinnabar-deep); font-weight: 600; }

/* 上下回 */
.pager {
  max-width: 860px; margin: 26px auto 0; padding: 0 22px 8px;
  display: grid; grid-template-columns: 1fr 1fr; gap: 14px;
}
.pager a {
  display: block; background: rgba(255, 252, 244, .72); border: 1px solid var(--line);
  border-radius: 10px; padding: 14px 18px; color: var(--ink);
}
.pager a:hover { border-color: var(--cinnabar); text-decoration: none; }
.pager .dir { font-size: 12.5px; color: var(--ink-faint); letter-spacing: 2px; }
.pager .t { font-family: var(--kai); margin-top: 3px; font-size: 16.5px; }
.pager .next { text-align: right; }

/* 目录页 */
.mulu-groups { display: flex; flex-direction: column; gap: 30px; }
.mulu-group h2 {
  font-family: var(--kai); font-size: 21px; letter-spacing: 4px; color: var(--ink);
  margin-bottom: 12px; display: flex; align-items: baseline; gap: 12px;
}
.mulu-group h2 small { font-size: 13px; color: var(--ink-faint); letter-spacing: 1px; font-weight: 400; }
.mulu-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px 26px; }
.mulu-item {
  display: flex; gap: 12px; align-items: baseline; padding: 8px 12px;
  border-radius: 8px; background: rgba(255, 252, 244, .55); border: 1px solid transparent;
}
.mulu-item:hover { border-color: var(--cinnabar); text-decoration: none; }
.mulu-item .num { font-family: var(--kai); color: var(--cinnabar); font-size: 15px; flex: none; letter-spacing: 1px; }
.mulu-item .t { font-family: var(--kai); color: var(--ink); font-size: 16px; letter-spacing: .5px; }
.mulu-item .flags { margin-left: auto; font-size: 11px; color: var(--gold); letter-spacing: 1px; flex: none; }
.mulu-item .flags .miss { color: var(--ink-faint); }

/* 关于页 */
.prose-page { max-width: 780px; margin: 0 auto; padding: 46px 22px 20px; }
.prose-page h1 { font-family: var(--kai); font-size: 30px; letter-spacing: 5px; margin-bottom: 22px; text-align: center; }
.prose-page h2 { font-family: var(--kai); font-size: 21px; letter-spacing: 3px; margin: 30px 0 12px; padding-left: 12px; border-left: 4px solid var(--cinnabar); }
.prose-page p, .prose-page li { color: var(--ink-soft); line-height: 2.05; font-size: 16px; }
.prose-page ul { padding-left: 1.6em; }

/* ---------- 响应式 ---------- */
@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; padding-top: 36px; }
  .hero-art { max-width: 520px; }
  .eras { grid-template-columns: repeat(2, 1fr); }
  .chapters-grid { grid-template-columns: repeat(2, 1fr); }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .mulu-list { grid-template-columns: 1fr; }
  .notes-list, .ana-block .people { grid-template-columns: 1fr; }
}
@media (max-width: 600px) {
  body { font-size: 16px; }
  .chapters-grid { grid-template-columns: 1fr; }
  .masthead-inner { gap: 12px; height: 56px; padding: 0 14px; }
  .brand-sub { display: none; }
  .nav { gap: 0; }
  .nav a { padding: 6px 8px; font-size: 15px; letter-spacing: 1px; }
  .mode-bar { top: 56px; }
  .reading, .analysis { padding-left: 14px; padding-right: 14px; }
  .para-pair { --read-fs: 18px; }
  .eras { grid-template-columns: 1fr; }
}

/* 打印：只留正文 */
@media print {
  .masthead, .mode-bar, .pager, .footer, .hero-cta { display: none !important; }
  body { background: #fff; font-size: 12pt; }
  .para-trans { display: none; }
}