/* ============================================================
   古籍文库 · 在线阅读 — 样式
   ============================================================ */
:root {
  --paper: #f6f1e4;        /* 纸色 */
  --paper-light: #fdfaf2;
  --ink: #3a3226;          /* 墨色 */
  --ink-soft: #6b6152;
  --accent: #9e2b25;       /* 朱红 */
  --accent-dark: #7d1f1a;
  --gold: #b48a3c;
  --line: #d8cfba;
  --shadow: 0 2px 10px rgba(60, 50, 30, 0.08);
  --font-serif: "Noto Serif SC", "Songti SC", "STSong", "SimSun", serif;
  --font-kai: "Kaiti SC", "STKaiti", "KaiTi", "DFKai-SB", serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-serif);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.8;
}

.container {
  max-width: 880px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ---------- 顶栏 ---------- */
.site-header {
  background: linear-gradient(180deg, #e8dcc0, #dfd1b0);
  border-bottom: 3px solid var(--gold);
  box-shadow: var(--shadow);
}

.header-inner {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 4px 16px;
  padding-top: 16px;
  padding-bottom: 14px;
}

.brand {
  font-size: 26px;
  font-weight: 700;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: 2px;
}

.brand-seal {
  display: inline-block;
  width: 34px;
  height: 34px;
  line-height: 34px;
  text-align: center;
  font-size: 20px;
  background: var(--accent);
  color: #fdf8ec;
  border-radius: 6px;
  margin-right: 6px;
  vertical-align: middle;
  font-family: var(--font-kai);
}

.tagline {
  color: var(--ink-soft);
  font-size: 14px;
}

/* ---------- 页脚 ---------- */
.site-footer {
  margin-top: 60px;
  padding: 18px 0 30px;
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: 13px;
  text-align: center;
}

/* ---------- 标题 ---------- */
.page-title {
  font-size: 30px;
  margin: 36px 0 6px;
  letter-spacing: 3px;
}

.page-sub {
  color: var(--ink-soft);
  margin: 0 0 28px;
  font-size: 15px;
}

.crumb {
  margin: 24px 0 0;
  font-size: 14px;
  color: var(--ink-soft);
}

.crumb a {
  color: var(--accent);
  text-decoration: none;
}

.crumb a:hover { text-decoration: underline; }

/* ---------- 文本说明便签 ---------- */
.book-notice {
  background: #fef9e7;               /* 淡米黄 */
  border-left: 4px solid #e67e22;    /* 左竖线装饰 */
  border-radius: 6px;
  padding: 12px 16px;
  margin: 18px 0 8px;
  font-size: 13px;
  color: #555;
  line-height: 1.9;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.06);
}

.book-notice strong {
  font-size: 14px;
  color: #7a4a1e;
}

.book-notice p {
  margin: 6px 0 0;
}

/* ---------- 书架 ---------- */
.book-shelf {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: 22px;
}

.book-card {
  display: block;
  background: var(--paper-light);
  border: 1px solid var(--line);
  border-left: 6px solid var(--accent);
  border-radius: 8px;
  padding: 22px 18px;
  text-decoration: none;
  color: var(--ink);
  box-shadow: var(--shadow);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.book-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 18px rgba(60, 50, 30, 0.14);
}

.book-card-title {
  font-size: 26px;
  font-weight: 700;
  letter-spacing: 4px;
  margin-bottom: 8px;
}

.book-card-meta {
  color: var(--ink-soft);
  font-size: 14px;
  margin-bottom: 12px;
}

.book-card-cats { display: flex; flex-wrap: wrap; gap: 6px; }

/* ---------- 分类标签 ---------- */
.cat-tag {
  display: inline-block;
  font-size: 12px;
  padding: 1px 8px;
  border-radius: 20px;
  background: #eee5d2;
  color: var(--ink-soft);
}

.cat-ji, .cat-benji { background: #f3e0d3; color: #8a3b2a; }
.cat-biao { background: #e5e8f0; color: #3c5673; }
.cat-shu  { background: #e2efe2; color: #2f6b3a; }
.cat-shijia { background: #f2ead3; color: #8a6d2f; }
.cat-liezhuan, .cat-zhuan { background: #e7e0ef; color: #5b3d86; }
.cat-zhi { background: #dfe9ea; color: #2c6b70; }
.cat-wei { background: #f0e2d2; color: #8a4a20; }
.cat-wu  { background: #e0e9f0; color: #2d4d7a; }

/* ---------- AI 阅读器入口 ---------- */
.ai-entry {
  margin: 30px 0 10px;
  text-align: center;
}

.btn-ai {
  display: inline-block;
  padding: 12px 30px;
  font-size: 17px;
  letter-spacing: 1px;
  color: #fff;
  background: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 30px;
  box-shadow: 0 3px 10px rgba(158, 43, 37, 0.28);
  transition: background 0.15s ease, transform 0.15s ease;
}

.btn-ai:hover {
  background: var(--accent-dark);
  color: #fff;
  transform: translateY(-1px);
}

/* AI 阅读模式悬浮按钮（右下角固定，滚动不消失） */
.btn-ai-mode {
  position: fixed;
  right: 24px;
  bottom: 28px;
  z-index: 999;
  padding: 14px 30px;
  font-size: 17px;
  letter-spacing: 1px;
  border-radius: 34px;
  color: #fff;
  background: #16a085;
  border-color: #16a085;
  box-shadow: 0 4px 14px rgba(22, 160, 133, 0.35);
}

.btn-ai-mode:hover {
  background: #12806a;
  color: #fff;
  transform: translateY(-1px);
}

@media (max-width: 560px) {
  .btn-ai-mode {
    right: 16px;
    bottom: 18px;
    padding: 12px 22px;
    font-size: 15px;
  }
}

/* ---------- 提示条 ---------- */
.notice {
  padding: 22px;
  text-align: center;
  color: var(--ink-soft);
  background: var(--paper-light);
  border: 1px dashed var(--line);
  border-radius: 8px;
  margin: 20px 0;
}

.notice.error {
  color: var(--accent);
  border-color: var(--accent);
  background: #fbeee8;
}



/* ---------- 书目页 ---------- */
.book-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  margin: 18px 0 26px;
}

#search {
  flex: 1;
  min-width: 200px;
  max-width: 380px;
  padding: 8px 14px;
  font-size: 15px;
  font-family: inherit;
  color: var(--ink);
  background: var(--paper-light);
  border: 1px solid var(--line);
  border-radius: 6px;
}

#search:focus {
  outline: none;
  border-color: var(--gold);
  box-shadow: 0 0 0 2px rgba(180, 138, 60, 0.25);
}

.stat { color: var(--ink-soft); font-size: 14px; }

.cat-block { margin-bottom: 34px; }

.cat-block-header {
  display: flex;
  align-items: baseline;
  gap: 12px;
  border-bottom: 2px solid var(--gold);
  padding-bottom: 6px;
  margin-bottom: 14px;
}

.cat-block-name {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 2px;
}

.cat-block-count {
  color: var(--ink-soft);
  font-size: 13px;
}

.section-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 8px 20px;
}

.section-item a {
  display: flex;
  align-items: baseline;
  gap: 8px;
  text-decoration: none;

/* ---------- 阅读器 ---------- */
.reader-wrap { max-width: 760px; }

.reader-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: 26px 0 18px;
}

.reader-tools { display: flex; gap: 8px; }

.btn {
  display: inline-block;
  padding: 6px 14px;
  font-size: 14px;
  font-family: inherit;
  color: var(--accent);
  background: var(--paper-light);
  border: 1px solid var(--line);
  border-radius: 6px;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.15s ease;
}

.btn:hover { background: #efe7d4; }

.reader {
  background: var(--paper-light);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 40px 44px;
  box-shadow: var(--shadow);
}

.reader-head {
  text-align: center;
  border-bottom: 1px dashed var(--line);
  padding-bottom: 18px;
  margin-bottom: 26px;
}

.reader-cat {
  display: inline-block;
  font-size: 13px;
  padding: 2px 12px;
  border-radius: 20px;
  margin-bottom: 10px;
}

.reader-title {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: 2px;
  margin: 0 0 8px;
}

.reader-meta {
  color: var(--ink-soft);
  font-size: 13px;
}

.reader-body p {
  margin: 0 0 12px;
  text-align: justify;
  text-indent: 2em;
}

.reader-nav {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-top: 26px;
}

.reader-nav .btn {
  flex: 1;
  text-align: center;
  padding: 10px 14px;
  font-size: 15px;
}

/* ---------- 响应式 ---------- */
@media (max-width: 560px) {
  .reader { padding: 24px 18px; }
  .header-inner { flex-direction: column; }
  .book-shelf { grid-template-columns: 1fr; }
}

  color: var(--ink);
  padding: 5px 8px;
  border-radius: 4px;
}

.section-item a:hover {
  background: #efe7d4;
}

.section-num {
  font-size: 12px;
  color: var(--gold);
  font-family: var(--font-kai);
  flex-shrink: 0;
}

/* ---------- 阅读设置：字体 / 配色 / 背景字色（与 AI 阅读器共用） ---------- */
.reading-settings{
  display: flex;
  flex-wrap: wrap;
  gap: 6px 16px;
  align-items: center;
  padding: 10px 12px;
  margin: 0 0 14px;
  background: var(--paper-light);
  border: 1px solid var(--line);
  border-radius: 8px;
}
.rs-group{ display: flex; align-items: center; gap: 6px; }
.rs-label{ font-size: 12px; color: var(--ink-soft); white-space: nowrap; }
.rs-btn{
  width: 28px; height: 28px;
  background: #f4f4f4;
  border: 1px solid #ddd;
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
  line-height: 1;
  color: #333;
}
.rs-btn:hover{ background: #e6e6e6; }
.rs-val{ font-size: 13px; color: #333; min-width: 22px; text-align: center; }
.scheme-btn{
  width: 30px; height: 30px;
  border-radius: 50%;
  border: 2px solid transparent;
  cursor: pointer;
  font-size: 11px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.scheme-btn:hover{ border-color: #bbb; }
.scheme-btn.active{ border-color: var(--accent); box-shadow: 0 0 0 2px rgba(158, 43, 37, 0.25); }
.rs-color{ width: 34px; height: 28px; padding: 1px; border: 1px solid #ddd; border-radius: 6px; cursor: pointer; background: #fff; }
.rs-hex{ width: 76px; padding: 4px 6px; border: 1px solid #ddd; border-radius: 6px; font-size: 12px; color: #333; }
.rs-rgb{ width: 88px; padding: 4px 6px; border: 1px solid #ddd; border-radius: 6px; font-size: 12px; color: #333; }

/* ---------- 作者手记入口（首页） ---------- */
.writing-entry {
  margin: 8px 0 26px;
  text-align: center;
}
.btn-writing {
  display: inline-block;
  padding: 10px 26px;
  font-size: 15px;
  letter-spacing: 1px;
  color: #fff;
  background: #c96f2e;              /* 暖橙，与 AI 阅读器入口的朱红区分 */
  border: 1px solid #c96f2e;
  border-radius: 30px;
  box-shadow: 0 3px 10px rgba(201, 111, 46, 0.28);
  transition: background 0.15s ease, transform 0.15s ease;
}
.btn-writing:hover {
  background: #a8531e;
  color: #fff;
  transform: translateY(-1px);
}

/* ---------- 支持作者 ---------- */
.support {
  margin: 0 0 18px;
  padding: 24px 20px 20px;
  background: var(--paper-light);
  border: 1px solid var(--line);
  border-radius: 10px;
  text-align: center;
}
.support-title {
  margin: 0 0 14px;
  font-size: 16px;
  color: var(--ink);
  letter-spacing: 1px;
}
.support-qr {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 16px;
}
.qr-slot {
  width: 116px;
  height: 116px;
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  overflow: hidden;
}
.qr-ph {
  border: 2px dashed var(--line);
  background: #fffdf7;
}
.qr-label {
  font-size: 13px;
  color: var(--ink);
}
.qr-hint {
  font-size: 11px;
  color: var(--ink-soft);
}
.qr-img {
  width: 116px;
  height: 116px;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: 8px;
}
.footer-note {
  color: var(--ink-soft);
  font-size: 13px;
}