/* ============================================================
   Openbook 开放书库 · 古典古籍风设计系统
   ============================================================ */
:root {
  --paper: #F8F4E8;
  --paper-dark: #FAF7EF;
  --card: #FFFFFF;
  --ink: #2C2C2C;
  --ink-2: #666666;
  --ink-3: #999999;
  --tan: #633F2E;
  --tan-light: #C28C67;
  --seal: #9E2B25;
  --line: #DCD6C8;
  --line-dark: #C4B89F;
  --shadow: 0 2px 9px rgba(99, 63, 46, 0.07);
  --maxw: 1200px;
  --serif: "Noto Serif SC", "Songti SC", "STSong", SimSun, "宋体", serif;
  --sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
}

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 14px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg width='100' height='100' viewBox='0 0 100 100' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M0 0h100v100H0z' fill='none'/%3E%3Cpath d='M0 0h100v1H0zM0 10h100v1H0zM0 20h100v1H0zM0 30h100v1H0zM0 40h100v1H0zM0 50h100v1H0zM0 60h100v1H0zM0 70h100v1H0zM0 80h100v1H0zM0 90h100v1H0z' stroke='%23633F2E' stroke-width='0.2' fill='none' opacity='0.05'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: -1;
}

@media (max-width: 768px) {
  body::before { display: none; }
}

a { color: var(--tan); text-decoration: none; }
a:hover { color: var(--tan-light); }

.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 16px;
}

@media (max-width: 480px) {
  .container { padding: 0 12px; }
}

/* ---------- 顶部导航 ---------- */
.site-nav {
  background: var(--paper-dark);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 50;
}

.site-nav .inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 0 0 auto;
}

.brand .seal {
  width: 32px; height: 32px;
  flex: 0 0 auto;
}

.brand .name {
  font-size: 20px;
  letter-spacing: 1px;
  color: var(--ink);
  font-weight: 700;
}

.nav-links {
  display: flex;
  gap: 20px;
  font-size: 14px;
  flex: 1;
  justify-content: center;
}

.nav-links a {
  color: var(--ink-2);
  padding: 4px 0;
  border-bottom: 2px solid transparent;
  transition: all .2s ease;
}

.nav-links a:hover {
  color: var(--tan);
  border-bottom-color: var(--tan);
}

.nav-links a.active {
  color: var(--tan);
  border-bottom-color: var(--tan);
  background: rgba(99, 63, 46, 0.05);
  padding: 4px 12px;
  border-radius: 4px;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
}

.nav-search {
  display: flex;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
}

.nav-search input {
  border: 0;
  outline: 0;
  background: transparent;
  padding: 6px 10px;
  font-family: var(--serif);
  font-size: 13px;
  color: var(--ink);
  width: 140px;
}

.nav-search button {
  border: 0;
  background: var(--tan);
  color: #fff;
  padding: 0 14px;
  font-family: var(--serif);
  font-size: 13px;
  cursor: pointer;
}

.nav-search button:hover { background: var(--tan-light); }

.theme-toggle {
  width: 32px;
  height: 32px;
  border: 1px solid var(--line);
  background: var(--card);
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  color: var(--ink-2);
}

.theme-toggle:hover {
  border-color: var(--tan);
  color: var(--tan);
}

.mobile-menu-btn {
  display: none;
  width: 40px;
  height: 40px;
  border: none;
  background: transparent;
  cursor: pointer;
  font-size: 18px;
  color: var(--ink);
}

@media (max-width: 768px) {
  .nav-links, .nav-search { display: none; }
  .mobile-menu-btn { display: block; }
}

.mobile-menu-open .nav-links {
  display: flex;
  flex-direction: column;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--card);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
  padding: 12px 16px;
  z-index: 100;
}

.mobile-menu-open .nav-links a {
  padding: 12px 0;
  border-bottom: 1px solid var(--line-light);
}

.mobile-menu-open .nav-links a:last-child {
  border-bottom: none;
}

/* ---------- 通用区块 ---------- */
.section { padding: 24px 0; }

.section-title {
  font-size: 24px;
  letter-spacing: 1px;
  line-height: 1.3;
  margin: 0 0 8px;
  color: var(--ink);
  text-align: center;
  position: relative;
  padding: 8px 0;
}

.section-title::before,
.section-title::after {
  content: "";
  position: absolute;
  left: 50%;
  width: 32px;
  height: 1px;
  background: var(--line);
  transform: translateX(-50%);
}

.section-title::before { top: 0; }
.section-title::after { bottom: 0; }

.section-sub {
  color: var(--ink-3);
  margin: 0 0 16px;
  font-size: 12px;
  text-align: center;
}

/* ---------- 首页 Hero ---------- */
.hero {
  background: var(--paper-dark);
  border-bottom: 1px solid var(--line);
  padding: 40px 0;
  text-align: center;
}

.hero h1 {
  font-size: 26px;
  letter-spacing: 1px;
  line-height: 1.3;
  margin: 0 0 8px;
  color: var(--ink);
}

.hero .tagline {
  font-size: 14px;
  color: var(--ink-2);
  letter-spacing: 1px;
  margin: 0 0 20px;
}

/* 检索框 */
.search-box {
  max-width: 520px;
  margin: 0 auto;
  display: flex;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.search-box input {
  flex: 1;
  border: 0;
  outline: 0;
  background: transparent;
  padding: 12px 16px;
  font-family: var(--serif);
  font-size: 14px;
  color: var(--ink);
}

.search-box button {
  border: 0;
  background: var(--tan);
  color: #fff;
  padding: 0 24px;
  font-family: var(--serif);
  font-size: 14px;
  cursor: pointer;
}

.search-box button:hover { background: var(--tan-light); }

/* 统计条 */
.stat-bar {
  margin: 20px auto 0;
  display: flex;
  justify-content: center;
  gap: 32px;
  color: var(--ink-2);
  font-size: 12px;
}

.stat-bar b {
  color: var(--tan);
  font-size: 18px;
  font-family: var(--sans);
  margin-right: 4px;
}

/* ---------- 分类入口 ---------- */
.scheme-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
  justify-content: center;
}

.scheme-tab {
  font-family: var(--serif);
  font-size: 14px;
  letter-spacing: 1px;
  padding: 6px 16px;
  border-radius: 6px;
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--ink-2);
  cursor: pointer;
  transition: all .15s ease;
}

.scheme-tab:hover {
  color: var(--tan);
  border-color: var(--tan);
}

.scheme-tab.active {
  background: var(--tan);
  border-color: var(--tan);
  color: #fff;
}

.scheme-note {
  font-size: 12px;
  color: var(--ink-2);
  margin: 0 0 16px;
  text-align: center;
}

.cat-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
}

.cat-card {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px;
  color: var(--ink);
  transition: transform .15s ease, box-shadow .15s ease;
}

.cat-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.cat-card .code {
  flex: 0 0 auto;
  width: 28px; height: 28px;
  border-radius: 6px;
  background: var(--paper-dark);
  color: var(--tan);
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.cat-card .body { min-width: 0; }

.cat-card .t {
  display: block;
  font-size: 15px;
  color: var(--ink);
  line-height: 1.4;
}

.cat-card .eg {
  display: block;
  font-size: 12px;
  color: var(--ink-3);
  line-height: 1.5;
  margin-top: 4px;
}

/* ---------- 书目网格 ---------- */
.book-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 16px;
}

@media (min-width: 1024px) {
  .book-grid { grid-template-columns: repeat(4, 1fr); }
}

@media (min-width: 768px) and (max-width: 1023px) {
  .book-grid { grid-template-columns: repeat(2, 1fr); }
}

.no-cover-mode .book-grid {
  grid-template-columns: 1fr;
  gap: 8px;
}

.no-cover-mode .book-card {
  flex-direction: row;
  align-items: center;
  padding: 12px;
  gap: 12px;
}

.no-cover-mode .book-cover {
  display: none;
}

.no-cover-mode .book-meta {
  padding: 0;
  flex: 1;
  min-width: 0;
}

.no-cover-mode .book-meta .t {
  font-size: 15px;
  -webkit-line-clamp: 1;
  min-height: 21px;
  margin-bottom: 4px;
}

.no-cover-mode .book-meta .a {
  font-size: 13px;
  margin-top: 0;
  margin-bottom: 4px;
}

.no-cover-mode .book-meta .tags {
  margin-top: 0;
}

.no-cover-mode .book-meta .tag {
  font-size: 11px;
  padding: 1px 6px;
}

.no-cover-mode .book-meta .o {
  font-size: 11px;
  margin-top: 4px;
}

.toggle-cover-btn {
  display: none;
  padding: 6px 12px;
  border: 1px solid var(--line);
  background: var(--card);
  border-radius: 6px;
  font-size: 12px;
  color: var(--ink-2);
  cursor: pointer;
  margin-left: 8px;
}

.toggle-cover-btn:hover {
  border-color: var(--tan);
  color: var(--tan);
}

@media (max-width: 768px) {
  .toggle-cover-btn { display: inline-flex; align-items: center; gap: 4px; }
  
  .sidebar-left .filter-group.collapsed .filter-group-body { display: block; }
  
  .sidebar-left #period-select,
  .sidebar-left #cat-select,
  .sidebar-left #author-select,
  .sidebar-left #publisher-select {
    display: none;
  }
  
  .sidebar-left .chips {
    margin-bottom: 12px;
    gap: 6px;
  }
  
  .sidebar-left .chip {
    padding: 5px 10px;
    font-size: 13px;
  }
  
  .filter-group-label {
    display: none;
  }
  
  .filter-group-body {
    padding-left: 0;
  }
}

.book-card {
  position: relative;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform .15s ease, box-shadow .15s ease;
}

.book-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.book-cover {
  aspect-ratio: 3 / 4;
  background: var(--paper-dark);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.book-cover svg, .book-cover img {
  width: 100%; height: 100%;
  display: block;
  object-fit: cover;
}

.book-meta { padding: 12px; }

.book-meta .t {
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 44px;
}

.book-meta .a {
  font-family: var(--sans);
  font-size: 14px;
  color: var(--ink-2);
  margin-top: 8px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.book-meta .tags {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-top: 8px;
}

.book-meta .tag {
  font-family: var(--sans);
  font-size: 12px;
  color: var(--tan);
  border: 1px solid var(--tan);
  border-radius: 4px;
  padding: 2px 8px;
}

.book-meta .o {
  font-family: var(--sans);
  font-size: 12px;
  color: var(--ink-3);
  margin-top: 8px;
}

/* ---------- 检索页工具条 ---------- */
.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  margin-bottom: 16px;
}

.toolbar .search-inline {
  flex: 1 1 260px;
  display: flex;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
}

.toolbar .search-inline input {
  flex: 1; border: 0; outline: 0; background: transparent;
  padding: 8px 12px; font-family: var(--serif); font-size: 14px; color: var(--ink);
}

.toolbar .search-inline button {
  border: 0; background: var(--tan); color: #fff; padding: 0 16px; cursor: pointer;
}

select {
  font-family: var(--serif);
  font-size: 14px;
  color: var(--ink);
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 8px 10px;
  outline: none;
  cursor: pointer;
}

.result-count { color: var(--ink-3); font-size: 12px; margin-left: auto; }

/* 筛选标签 */
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 16px; }

.chip {
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--ink-2);
  border-radius: 6px;
  padding: 4px 12px;
  font-size: 12px;
  cursor: pointer;
  transition: all .12s;
}

.chip:hover { color: var(--tan); border-color: var(--tan); }
.chip.active { background: var(--tan); color: #fff; border-color: var(--tan); }

/* 分页 */
.pagination {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 24px;
  flex-wrap: wrap;
}

.pagination button {
  min-width: 36px;
  padding: 6px 10px;
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--ink-2);
  border-radius: 8px;
  cursor: pointer;
  font-family: var(--serif);
  font-size: 13px;
}

.pagination button:hover:not(:disabled) { border-color: var(--tan); color: var(--tan); }
.pagination button.active { background: var(--tan); color: #fff; border-color: var(--tan); }
.pagination button:disabled { opacity: .4; cursor: default; }

.pagination .page-info {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--ink-3);
  font-size: 13px;
}

.pagination .page-dots {
  display: flex;
  align-items: center;
  color: var(--ink-3);
  font-size: 13px;
}

.empty {
  text-align: center;
  color: var(--ink-3);
  padding: 48px 0;
  font-size: 14px;
}

/* ---------- 详情页 ---------- */
.detail {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 24px;
  align-items: start;
}

.detail .cover-wrap {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.detail .cover-wrap svg, .detail .cover-wrap img { width: 100%; display: block; }

.detail .title {
  font-size: 24px;
  letter-spacing: 1px;
  line-height: 1.3;
  margin: 0 0 8px;
}

.detail .author { font-family: var(--sans); font-size: 14px; color: var(--ink-2); margin-bottom: 16px; }

.meta-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 16px;
}

.meta-table th, .meta-table td {
  text-align: left;
  padding: 8px 12px;
  border-bottom: 1px solid var(--line);
  font-size: 14px;
  vertical-align: top;
}

.meta-table th {
  color: var(--ink-3);
  font-weight: 400;
  width: 88px;
  white-space: nowrap;
}

.note {
  background: rgba(99, 63, 46, 0.05);
  border-left: 3px solid var(--tan);
  padding: 12px 16px;
  border-radius: 6px;
  color: var(--ink-2);
  font-size: 14px;
  margin-bottom: 16px;
}

/* 按钮 */
.btn {
  display: inline-block;
  border: 1px solid var(--tan);
  background: var(--tan);
  color: #fff;
  padding: 10px 24px;
  border-radius: 8px;
  font-family: var(--serif);
  font-size: 14px;
  cursor: pointer;
}

.btn:hover { background: var(--tan-light); }

.btn-outline {
  display: inline-block;
  border: 1px solid var(--tan);
  background: transparent;
  color: var(--tan);
  padding: 10px 24px;
  border-radius: 8px;
  font-family: var(--serif);
  font-size: 14px;
  cursor: pointer;
}

.btn-outline:hover {
  background: rgba(99, 63, 46, 0.05);
}

.btn-placeholder {
  display: inline-block;
  border: 1px dashed var(--line);
  background: transparent;
  color: var(--ink-3);
  padding: 10px 24px;
  border-radius: 8px;
  font-size: 14px;
  cursor: not-allowed;
}

.back-link { display: inline-block; margin-bottom: 16px; color: var(--ink-2); font-size: 12px; }
.back-link:hover { color: var(--tan); }

/* ---------- 关于页 ---------- */
.prose { max-width: 800px; }

.prose h2 {
  font-size: 20px; letter-spacing: 1px; margin: 24px 0 12px;
  border-bottom: 1px solid var(--line); padding-bottom: 8px;
}

.prose p { color: var(--ink-2); font-size: 14px; line-height: 1.8; }

.prose ul { color: var(--ink-2); padding-left: 20px; font-size: 14px; }

/* ---------- 页脚 ---------- */
.site-footer {
  border-top: 1px solid var(--line);
  background: var(--paper-dark);
  margin-top: 32px;
  padding: 24px 0;
  color: var(--ink-3);
  font-size: 12px;
}

.site-footer .inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 16px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.footer-col { padding: 0 8px; }

.footer-col h4 {
  font-size: 14px;
  color: var(--ink);
  margin: 0 0 12px;
}

.footer-col ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-col li { margin-bottom: 6px; }

.footer-col a { color: var(--ink-2); }
.footer-col a:hover { color: var(--tan); }

.footer-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-stat {
  font-size: 12px;
  color: var(--ink-2);
}

.footer-stat b {
  font-size: 16px;
  color: var(--tan);
  font-family: var(--sans);
}

/* QR 二维码 */
.social-links {
  display: flex;
  gap: 20px;
  align-items: flex-start;
}

.qr-link {
  display: inline-block;
}

.qr-link img {
  width: 180px;
  height: auto;
  border-radius: 6px;
}

.social-link {
  width: 36px;
  height: 36px;
  border: 1px solid var(--line);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--ink-2);
  transition: all .15s;
}

.social-link:hover {
  border-color: var(--tan);
  color: var(--tan);
}

.site-footer .copy {
  text-align: center;
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  grid-column: 1 / -1;
}

@media (max-width: 768px) {
  .site-footer .inner { grid-template-columns: 1fr; text-align: center; }
  .social-links { justify-content: center; }
}

/* ---------- 人物库 / 机构库 ---------- */
.people-tabs { display: flex; gap: 8px; margin-bottom: 16px; }

.ptab {
  font: inherit; cursor: pointer; padding: 6px 16px; border-radius: 6px;
  border: 1px solid var(--line); background: var(--card); color: var(--ink-2);
  font-size: 14px; transition: all .12s;
}

.ptab:hover { color: var(--tan); border-color: var(--tan); }
.ptab.active { background: var(--tan); color: #fff; border-color: var(--tan); }

.toolbar-inline { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }

.toolbar-inline #people-q {
  flex: 1; max-width: 320px; padding: 8px 12px; border: 1px solid var(--line);
  border-radius: 8px; font: inherit; background: var(--card); color: var(--ink);
}

.people-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 16px; }

.people-card {
  display: block; background: var(--card); border: 1px solid var(--line); border-radius: 8px;
  padding: 16px; color: var(--ink); transition: transform .15s, box-shadow .15s;
}

.people-card:hover { transform: translateY(-2px); box-shadow: var(--shadow); }

.pc-name { font-size: 16px; font-weight: 700; display: flex; align-items: baseline; gap: 8px; flex-wrap: wrap; }

.pc-name .plife { font-family: var(--sans); font-size: 12px; font-weight: 400; color: var(--ink-3); }

.pc-count { font-size: 12px; color: var(--tan); margin: 4px 0 8px; }

.pc-bio { font-family: var(--sans); font-size: 12px; color: var(--ink-3); line-height: 1.7;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

.people-detail .back, .book-detail .back {
  display: inline-block; margin: 4px 0 16px; color: var(--ink-2); font-size: 12px;
}

.people-detail .back:hover, .book-detail .back:hover { color: var(--tan); }

.people-head { border-bottom: 1px solid var(--line); padding-bottom: 12px; margin-bottom: 16px; }

.people-head h1 { font-size: 24px; letter-spacing: 1px; color: var(--ink); }

.people-head .plife { font-family: var(--sans); font-size: 12px; color: var(--ink-3); margin-top: 4px; }

.people-head .ptag {
  display: inline-block; font-size: 12px; color: var(--tan);
  border: 1px solid rgba(99, 63, 46, 0.3); border-radius: 4px; padding: 2px 10px; margin-top: 8px;
}

.people-head .pcount { font-size: 12px; color: var(--ink-3); margin-top: 8px; }

/* 详情区块「查看全部藏书」链接 */
.sec-more-wrap { margin-bottom: 8px; }

.sec-more { font-size: 12px; color: var(--tan); }
.sec-more:hover { text-decoration: underline; }

/* 首页 - 人物与机构预览 */
.people-preview { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }

.pp-col { background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 16px; }

.pp-h { font-size: 14px; font-weight: 700; color: var(--ink); margin-bottom: 12px; }

.pp-tags { display: flex; flex-wrap: wrap; gap: 8px; }

.pp-tag {
  display: inline-flex; align-items: center; gap: 4px; font-family: var(--sans); font-size: 12px;
  background: var(--paper-dark); border: 1px solid var(--line); border-radius: 4px;
  padding: 3px 10px; color: var(--ink-2); transition: all .12s;
}

.pp-tag:hover { color: var(--tan); border-color: var(--tan); }

.pp-tag i { font-style: normal; font-size: 11px; color: var(--ink-3); }

.more-link { margin-top: 12px; font-size: 12px; }

.more-link a { color: var(--tan); }
.more-link a:hover { text-decoration: underline; }

.chips-label { font-size: 12px; color: var(--ink-3); margin: 4px 0 2px; }

.more-btn {
  display: block; margin: 16px auto 0; font: inherit; cursor: pointer;
  padding: 8px 24px; border-radius: 8px; border: 1px solid var(--line);
  background: var(--card); color: var(--ink-2); font-size: 13px; transition: all .12s;
}

.more-btn:hover { color: var(--tan); border-color: var(--tan); }

/* ---------- 响应式 ---------- */
@media (max-width: 768px) {
  .hero h1 { font-size: 22px; letter-spacing: 1px; }
  .stat-bar { gap: 20px; }
  .detail { grid-template-columns: 1fr; }
  .detail .cover-wrap { max-width: 200px; }
  .nav-links { gap: 12px; font-size: 13px; }
  .people-preview { grid-template-columns: 1fr; }
  .people-list { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); }
}

@media (max-width: 480px) {
  .book-grid { grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); gap: 12px; }
}

/* ---------- 列表奇偶行样式 ---------- */
.striped-list > div:nth-child(odd) {
  background: var(--paper-dark);
}

/* ---------- 书籍详情额外区块 ---------- */
.detail-extra { margin-top: 24px; }
.detail-extra .section-title { margin-bottom: 12px; }

.detail-section { margin-bottom: 16px; }

.detail-section h3 {
  font-size: 16px; letter-spacing: 1px; color: var(--ink);
  margin: 0 0 8px; padding-left: 10px; border-left: 3px solid var(--tan);
}

.detail-section .prose-block { font-family: var(--sans); color: var(--ink-2); font-size: 14px; line-height: 1.8; }

.detail-section .toc-box {
  font-family: var(--sans); color: var(--ink-2); font-size: 13px; line-height: 1.9;
  background: var(--card); border: 1px solid var(--line); border-radius: 8px;
  padding: 12px 16px; max-height: 320px; overflow-y: auto;
}

/* 详情页 - 读书笔记 */
.note-core {
  background: var(--card);
  border: 1px solid var(--line);
  border-left: 4px solid var(--tan);
  border-radius: 8px;
  padding: 16px 20px;
  margin-bottom: 20px;
}

.note-core h3 {
  font-size: 17px; letter-spacing: 2px; color: var(--tan);
  margin: 0 0 10px; padding-left: 0; border-left: none;
}

.empty-note {
  color: var(--ink-3); font-style: italic; font-size: 13px;
  background: var(--paper-dark); border-radius: 6px; padding: 12px 16px;
}

.legal-block { background: transparent; }
.legal-block h3 { color: var(--ink-2); font-size: 14px; border-left-color: var(--line); }
.legal-block .prose-block { font-size: 13px; color: var(--ink-3); }

/* 详情页 - 作者信息卡片 */
.author-card {
  background: var(--card); border: 1px solid var(--line); border-radius: 8px;
  padding: 14px 18px; margin-top: 14px;
}

.author-card .aname { font-size: 16px; font-weight: 700; color: var(--ink); }
.author-card .alife { font-family: var(--sans); font-size: 12px; color: var(--ink-3); margin-bottom: 6px; }
.author-card .abio { font-family: var(--sans); font-size: 13px; color: var(--ink-2); line-height: 1.8; }

/* ---------- 深色模式 ---------- */
body.dark-theme {
  --paper: #22201C;
  --paper-dark: #2A2724;
  --card: #33302B;
  --ink: #EAE5D9;
  --ink-2: #A8A195;
  --ink-3: #7A7268;
  --tan: #C28C67;
  --tan-light: #D4A584;
  --seal: #B9493F;
  --line: #4A4540;
}

body.dark-theme .book-cover {
  background: #33302B;
}

body.dark-theme .cat-card .code,
body.dark-theme .pp-tag {
  background: #2A2724;
}

body.dark-theme .note {
  background: rgba(194, 140, 103, 0.1);
}

body.dark-theme .note-core {
  border-left-color: #C28C67;
}

body.dark-theme .empty-note {
  background: #2A2724;
}

body.dark-theme .theme-toggle {
  background: #33302B;
}

body.dark-theme .nav-search input {
  background: #33302B;
}

body.dark-theme .search-box input {
  background: #33302B;
}

body.dark-theme .toolbar .search-inline input {
  background: #33302B;
}

body.dark-theme #people-q {
  background: #33302B;
}

body.dark-theme select {
  background: #33302B;
}

body.dark-theme .pagination button {
  background: #33302B;
}

body.dark-theme .scheme-tab {
  background: #33302B;
}

body.dark-theme .chip {
  background: #33302B;
}

body.dark-theme .ptab {
  background: #33302B;
}

body.dark-theme .more-btn {
  background: #33302B;
}

/* ============================================================
   三栏布局 + 书籍卡片美化 + 筛选栏 + 响应式
   ============================================================ */

/* ---------- 三栏布局 ---------- */
.three-col-layout {
  display: grid;
  grid-template-columns: 288px 1fr 264px;
  margin: 0 auto;
  gap: 0;
  min-height: calc(100vh - 60px - 80px);
}

/* 左侧筛选栏 */
.sidebar-left {
  position: sticky;
  top: 40px;
  height: calc(100vh - 120px);
  overflow-y: auto;
  padding: 20px 14px;
  border-right: 1px solid var(--line);
  background: linear-gradient(180deg, var(--paper) 0%, var(--paper-dark) 100%);
  scrollbar-width: thin;
  scrollbar-color: var(--line) transparent;
}

.sidebar-left::-webkit-scrollbar { width: 4px; }
.sidebar-left::-webkit-scrollbar-thumb { background: var(--line); border-radius: 2px; }

.sidebar-left h2 {
  font-size: 16px;
  color: var(--ink);
  margin: 0 0 14px;
  letter-spacing: 2px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line-dark);
}

.sidebar-left form.search-inline {
  display: flex;
  gap: 4px;
  margin-bottom: 14px;
}

.sidebar-left form.search-inline input {
  flex: 1;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
  font: inherit;
  background: var(--card);
  color: var(--ink);
  font-size: 13px;
  transition: border-color .15s, box-shadow .15s;
}

.sidebar-left form.search-inline input:focus {
  outline: none;
  border-color: var(--tan);
  box-shadow: 0 0 0 2px rgba(99, 63, 46, 0.12);
}

.sidebar-left form.search-inline button {
  padding: 8px 14px;
  background: var(--tan);
  color: #fff;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font: inherit;
  font-size: 13px;
  transition: background .15s;
}

.sidebar-left form.search-inline button:hover { background: var(--tan-light); }

/* 筛选分组 */
.filter-group {
  margin-bottom: 14px;
}

.filter-group-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-2);
  cursor: pointer;
  user-select: none;
  border-radius: 4px;
  transition: background .1s;
}

.filter-group-label:hover { background: rgba(99, 63, 46, 0.05); }

.filter-group-label .arrow {
  font-size: 10px;
  transition: transform .2s ease;
}

.filter-group.collapsed .filter-group-label .arrow { transform: rotate(-90deg); }
.filter-group.collapsed .filter-group-body { display: none; }

.filter-group-body { padding-left: 4px; }

.sidebar-left select {
  display: block;
  width: 100%;
  padding: 7px 10px;
  margin-bottom: 6px;
  border: 1px solid var(--line);
  border-radius: 6px;
  font: inherit;
  font-size: 13px;
  background: var(--card);
  color: var(--ink);
  cursor: pointer;
  transition: border-color .15s;
}

.sidebar-left select:focus {
  outline: none;
  border-color: var(--tan);
}

.sidebar-left select:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.sidebar-left .result-count {
  display: block;
  font-size: 12px;
  color: var(--ink-3);
  padding: 4px 8px;
  background: rgba(99, 63, 46, 0.04);
  border-radius: 4px;
  margin-bottom: 10px;
}

/* 芯片标签 */
.sidebar-left .chips {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-bottom: 8px;
}

.sidebar-left .chip {
  display: inline-block;
  padding: 3px 8px;
  border: 1px solid var(--line);
  border-radius: 12px;
  font-size: 11px;
  cursor: pointer;
  background: var(--card);
  color: var(--ink-2);
  transition: all .15s;
}

.sidebar-left .chip.active,
.sidebar-left .chip:hover {
  background: var(--tan);
  border-color: var(--tan);
  color: #fff;
}

/* 搜索中动画 */
.searching-overlay {
  display: none;
  position: absolute;
  inset: 0;
  background: rgba(248, 244, 232, 0.8);
  align-items: center;
  justify-content: center;
  z-index: 10;
  backdrop-filter: blur(2px);
}

.searching-overlay.active { display: flex; }

.searching-spinner {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--tan);
}

.searching-spinner::before {
  content: "";
  width: 16px;
  height: 16px;
  border: 2px solid var(--line);
  border-top-color: var(--tan);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- 中间内容区 ---------- */
.main-content {
  padding: 20px 24px;
  min-width: 0;
}

.main-content .book-grid {
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
}

@media (min-width: 1024px) {
  .main-content .book-grid { grid-template-columns: repeat(5, 1fr); }
}

/* 书籍卡片增强 */
.book-card {
  position: relative;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform .2s cubic-bezier(.2,.8,.2,1), box-shadow .2s ease, border-color .2s ease;
  cursor: pointer;
}

.book-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(99, 63, 46, 0.12);
  border-color: var(--tan-light);
}

.book-cover {
  aspect-ratio: 3 / 4;
  background: linear-gradient(135deg, var(--paper-dark) 0%, var(--paper) 100%);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
  position: relative;
}

.book-cover img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
  transition: opacity .3s;
}

.book-cover img[src=""] + .book-cover-fallback,
.book-cover img:not([src]) {
  opacity: 0;
}

.book-cover-fallback {
  position: absolute;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 12px;
  text-align: center;
  font-size: 13px;
  color: var(--ink-3);
  font-style: italic;
  background: linear-gradient(135deg, var(--paper-dark) 0%, rgba(99, 63, 46, 0.05) 100%);
}

.book-meta { padding: 10px 12px; }

.book-meta .t {
  font-size: 14px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 4px;
}

.book-meta .a {
  font-size: 12px;
  color: var(--ink-2);
  margin-bottom: 6px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.book-cover.cover-fail img { display: none; }
.book-cover.cover-fail .book-cover-fallback { display: flex; }

/* 滚动条美化 */
.sidebar-left::-webkit-scrollbar { width: 4px; }
.sidebar-left::-webkit-scrollbar-thumb { background: var(--line); border-radius: 2px; }
.sidebar-right::-webkit-scrollbar { width: 4px; }
.sidebar-right::-webkit-scrollbar-thumb { background: var(--line); border-radius: 2px; }

.book-meta .tags { margin-bottom: 6px; }

.book-meta .tag {
  display: inline-block;
  padding: 1px 6px;
  font-size: 10px;
  background: rgba(99, 63, 46, 0.06);
  border-radius: 3px;
  color: var(--ink-2);
  margin-right: 3px;
}

.book-meta .o {
  font-size: 11px;
  font-family: var(--sans);
  color: var(--ink-3);
}

/* 空状态 */
.empty {
  text-align: center;
  padding: 60px 20px;
  color: var(--color-text-secondary, var(--ink-3));
  font-size: 15px;
}

/* ---------- 侧栏扩展区块 ---------- */
.sidebar-section {
  margin-top: 22px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.sidebar-section h3 {
  font-size: 11px;
  color: var(--ink-2);
  margin: 0 0 10px;
  font-weight: 500;
  letter-spacing: 1.5px;
  text-transform: uppercase;
}

/* 藏书概览 */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
}

.stat {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 8px 4px;
  text-align: center;
  text-decoration: none;
  color: inherit;
  transition: border-color .15s, background .15s;
}

.stat:hover {
  border-color: var(--tan);
  background: var(--paper-dark);
}

.stat .num {
  display: block;
  font-size: 16px;
  font-weight: 500;
  color: var(--ink);
  line-height: 1.2;
}

.stat .lbl {
  display: block;
  font-size: 10px;
  color: var(--ink-2);
  margin-top: 2px;
}

/* 时期分布 */
.period-bars {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.period-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 5px 6px;
  text-decoration: none;
  color: inherit;
  border-radius: 4px;
  transition: background .15s;
}

.period-bar:hover {
  background: var(--paper-dark);
}

.period-bar .bar-label {
  font-size: 11px;
  color: var(--ink-2);
  width: 86px;
  flex-shrink: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.period-bar .bar-track {
  flex: 1;
  background: var(--paper-dark);
  border-radius: 3px;
  height: 8px;
  overflow: hidden;
}

.period-bar .bar-fill {
  height: 100%;
  background: var(--tan);
  border-radius: 3px;
  transition: width .5s ease;
}

.period-bar .bar-count {
  font-size: 11px;
  color: var(--ink-2);
  width: 28px;
  text-align: right;
  flex-shrink: 0;
}

/* 最近上架 */
.recent-books {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.recent-book {
  display: flex;
  gap: 8px;
  padding: 6px;
  border-radius: 6px;
  text-decoration: none;
  color: inherit;
  transition: background .15s;
}

.recent-book:hover {
  background: var(--paper-dark);
}

.recent-book .mini-cover {
  width: 32px;
  height: 44px;
  background: var(--paper-dark);
  border-radius: 3px;
  flex-shrink: 0;
  overflow: hidden;
  border: 0.5px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 9px;
  color: var(--ink-3);
}

.recent-book .mini-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.recent-book .mini-meta {
  flex: 1;
  min-width: 0;
}

.recent-book .mini-title {
  font-size: 12px;
  color: var(--ink);
  line-height: 1.35;
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.recent-book .mini-code {
  font-size: 10px;
  color: var(--ink-3);
  margin-top: 2px;
}

/* 检索提示 */
.tips {
  margin: 0;
  padding-left: 18px;
  font-size: 11px;
  color: var(--ink-2);
  line-height: 1.7;
}

.tips li {
  margin-bottom: 2px;
}

/* ---------- 可搜索下拉 ---------- */
.searchable-select {
  position: relative;
  margin-bottom: 10px;
}

.ss-input {
  width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--paper);
  font-size: 13px;
  color: var(--ink);
  box-sizing: border-box;
  transition: border-color .15s;
}

.ss-input:focus {
  outline: none;
  border-color: var(--tan);
}

.ss-input.active {
  border-color: var(--tan);
}

.ss-dropdown {
  display: none;
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  right: 0;
  max-height: 280px;
  overflow-y: auto;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 6px;
  box-shadow: 0 4px 16px rgba(99, 63, 46, 0.12);
  z-index: 100;
}

.ss-dropdown.open {
  display: block;
}

.ss-item {
  padding: 7px 12px;
  cursor: pointer;
  font-size: 13px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  transition: background .12s;
}

.ss-item:hover {
  background: var(--paper-dark);
}

.ss-item.active {
  background: var(--tan);
  color: #fff;
}

.ss-item.active .ss-count {
  color: rgba(255, 255, 255, 0.85);
}

.ss-item .ss-name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1;
  min-width: 0;
}

.ss-item .ss-count {
  color: var(--ink-2);
  font-size: 12px;
  flex-shrink: 0;
}

.ss-item.ss-all {
  font-weight: 500;
  color: var(--ink-2);
  border-bottom: 1px solid var(--line);
}

.ss-empty {
  padding: 14px 12px;
  text-align: center;
  font-size: 12px;
  color: var(--ink-2);
  font-style: italic;
}

/* ---------- 分页 ---------- */
.pagination {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 4px;
  margin-top: 24px;
  padding: 16px 0;
}

.pagination button {
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--card);
  color: var(--ink-2);
  cursor: pointer;
  font: inherit;
  font-size: 13px;
  transition: all .15s;
  min-width: 36px;
}

.pagination button:hover:not(:disabled) {
  border-color: var(--tan);
  color: var(--tan);
  background: rgba(99, 63, 46, 0.05);
}

.pagination button.active {
  background: var(--tan);
  border-color: var(--tan);
  color: #fff;
}

.pagination button:disabled {
  color: var(--ink-3);
  cursor: default;
}

/* ---------- 右侧二维码栏 ---------- */
.sidebar-right {
  position: sticky;
  top: 40px;
  height: calc(100vh - 120px);
  overflow-y: auto;
  padding: 20px 14px;
  border-left: 1px solid var(--line);
  background: linear-gradient(180deg, var(--paper) 0%, var(--paper-dark) 100%);
}

.sidebar-right h2 {
  font-size: 14px;
  color: var(--ink);
  margin: 0 0 14px;
  letter-spacing: 1px;
  text-align: center;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line-dark);
}

#qr-collage {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}

.qr-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.qr-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
  padding: 4px 12px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 12px;
  white-space: nowrap;
}

.qr-fail .sidebar-qr { display: none; }

.sidebar-qr {
  width: 180px;
  height: auto;
  display: block;
  border-radius: 8px;
  box-shadow: 0 2px 12px rgba(99, 63, 46, 0.1);
  transition: box-shadow .2s;
}

.sidebar-qr:hover {
  box-shadow: 0 4px 20px rgba(99, 63, 46, 0.18);
}

/* ---------- 响应式 ---------- */
@media (max-width: 1200px) {
  .three-col-layout { grid-template-columns: 200px 1fr; }
  .sidebar-right { display: none; }
}

@media (max-width: 768px) {
  .three-col-layout { display: block; }
  
  .sidebar-left {
    position: static;
    height: auto;
    border-right: none;
    border-bottom: 2px solid var(--line-dark);
    max-height: 300px;
    overflow-y: auto;
  }
  
  .main-content { padding: 16px; }
  
  .main-content .book-grid {
    grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  }
}

@media (max-width: 480px) {
  .main-content .book-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }
  
  .book-meta .t { font-size: 13px; }
  .book-meta .a { font-size: 11px; }
}