:root {
  --bg: #f4f2ec;
  --panel: #ffffff;
  --text: #1f2328;
  --muted: #5f6b7a;
  --line: #d6dbe3;
  --brand: #0f6a5e;
  --brand-soft: #dcefe9;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: radial-gradient(circle at top right, #e6efe9 0%, var(--bg) 55%);
  color: var(--text);
  font-family: "Noto Sans SC", "Microsoft YaHei", sans-serif;
}

.page {
  max-width: 1380px;
  margin: 0 auto;
  padding: 24px 16px 40px;
}

.topbar h1 {
  margin: 0;
  font-size: 28px;
}

.subtitle {
  margin: 8px 0 0;
  color: var(--muted);
}

.tabs {
  margin-top: 16px;
  display: inline-flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}

.tab-label {
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  padding: 0 2px 0 8px;
}

.tab {
  text-decoration: none;
  color: var(--text);
  border: 1px solid var(--line);
  background: var(--panel);
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 14px;
}

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

.panel {
  margin-top: 18px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel);
}

.controls {
  display: grid;
  grid-template-columns: auto 160px 1fr auto;
  gap: 10px;
  align-items: center;
}

.controls label {
  color: var(--muted);
  font-size: 14px;
}

select, input, button {
  height: 40px;
  border-radius: 8px;
  border: 1px solid var(--line);
  padding: 0 12px;
  font-size: 14px;
}

input {
  min-width: 220px;
}

button {
  background: var(--brand);
  color: #fff;
  border-color: var(--brand);
  cursor: pointer;
}

.hint {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.results {
  margin-top: 16px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
  gap: 12px;
}

.feat-browser {
  margin-top: 16px;
  display: grid;
  grid-template-columns: 230px minmax(280px, 390px) minmax(0, 1fr);
  gap: 14px;
  align-items: start;
}

.book-sidebar,
.feat-list-panel,
.feat-detail-panel {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 10px 30px rgba(31, 35, 40, 0.06);
}

.book-sidebar {
  position: sticky;
  top: 14px;
  max-height: calc(100vh - 28px);
  overflow: hidden;
  padding: 12px;
}

.sidebar-title {
  padding: 2px 4px 10px;
  color: var(--text);
  font-weight: 700;
}

.filter-section + .filter-section {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
}

.filter-title {
  margin: 0 4px 8px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.book-list {
  display: flex;
  flex-direction: column;
  gap: 7px;
  max-height: calc((100vh - 128px) / 2);
  overflow: auto;
  padding-right: 4px;
}

.type-list {
  max-height: 300px;
}

.book-tab {
  width: 100%;
  height: auto;
  min-height: 38px;
  border-radius: 10px;
  border: 1px solid transparent;
  background: #f8faf8;
  color: var(--text);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  text-align: left;
}

.book-tab span {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.book-tab em {
  flex: 0 0 auto;
  min-width: 30px;
  padding: 2px 8px;
  border-radius: 999px;
  background: #e9efe9;
  color: var(--muted);
  font-style: normal;
  font-size: 12px;
  text-align: center;
}

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

.book-tab.active em {
  background: rgba(255, 255, 255, 0.22);
  color: #fff;
}

.feat-list-panel {
  position: sticky;
  top: 14px;
  max-height: calc(100vh - 28px);
  overflow: hidden;
}

.feat-list {
  max-height: calc(100vh - 28px);
  overflow: auto;
  padding: 10px;
}

.feat-row {
  width: 100%;
  height: auto;
  display: grid;
  gap: 4px;
  padding: 11px 12px;
  margin: 0 0 8px;
  border: 1px solid transparent;
  border-radius: 12px;
  background: #fbfcfb;
  color: var(--text);
  text-align: left;
}

.feat-row:hover {
  background: var(--brand-soft);
}

.feat-row.active {
  border-color: var(--brand);
  background: linear-gradient(135deg, var(--brand-soft), #fff);
}

.feat-row-title {
  font-weight: 700;
  line-height: 1.35;
}

.feat-row-book,
.feat-row-summary {
  color: var(--muted);
  font-size: 12px;
  line-height: 1.35;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.feat-detail-panel {
  min-height: 420px;
  padding: 0;
  overflow: hidden;
}

.feat-detail-card {
  padding: 20px;
}

.detail-kicker {
  color: var(--brand);
  font-size: 13px;
  font-weight: 700;
}

.feat-detail-card h2 {
  margin: 8px 0 16px;
  font-size: 24px;
  line-height: 1.25;
}

.type-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0 0 12px;
}

.type-badge {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  padding: 3px 9px;
  border-radius: 999px;
  background: var(--brand-soft);
  color: var(--brand);
  font-size: 12px;
  font-weight: 700;
}

.detail-section {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.detail-section h4 {
  margin: 0 0 8px;
  color: var(--muted);
  font-size: 13px;
  letter-spacing: 0.04em;
}

.detail-section p {
  margin: 0;
  line-height: 1.72;
  white-space: pre-wrap;
}

.attached-table {
  overflow: auto;
  margin-top: 10px;
}

.attached-table-title {
  margin-bottom: 6px;
  font-weight: 700;
}

.attached-table table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.attached-table th {
  border: 1px solid var(--line);
  padding: 7px 8px;
  background: #eef3ef;
  color: var(--brand);
  text-align: left;
  vertical-align: top;
}

.attached-table td {
  border: 1px solid var(--line);
  padding: 6px 8px;
  vertical-align: top;
}

.ioun-table-wrap {
  max-height: 520px;
}

.ioun-table th:nth-child(1),
.ioun-table td:nth-child(1) {
  min-width: 150px;
  font-weight: 700;
}

.ioun-table th:nth-child(5),
.ioun-table td:nth-child(5),
.ioun-table th:nth-child(6),
.ioun-table td:nth-child(6) {
  min-width: 260px;
  line-height: 1.55;
}

.empty-list,
.empty-detail {
  padding: 18px;
  color: var(--muted);
}

.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 12px;
}

.card h3 {
  margin: 0;
  font-size: 17px;
}

.meta {
  margin-top: 8px;
  color: var(--muted);
  font-size: 13px;
}

.block {
  margin-top: 8px;
  font-size: 14px;
  line-height: 1.5;
  white-space: pre-wrap;
}

.switch-grid {
  margin-top: 20px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 14px;
}

.switch-card {
  display: block;
  padding: 18px;
  text-decoration: none;
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel);
}

.switch-card:hover {
  background: var(--brand-soft);
}

.switch-card h2 {
  margin: 0;
  font-size: 22px;
}

.switch-card p {
  margin: 10px 0 0;
  color: var(--muted);
}

.class-controls {
  grid-template-columns: auto 1fr auto;
}

.class-section-switch {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.class-section-option {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 34px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #f8faf8;
  color: var(--text);
  font-weight: 800;
  cursor: pointer;
}

.class-section-option::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: #9aa5a0;
}

.class-section-option span {
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.class-section-option.active {
  background: var(--brand);
  border-color: var(--brand);
  color: #fff;
}

.class-section-option.active::before {
  background: #fff;
}

.class-section-option.active span {
  color: rgba(255, 255, 255, 0.8);
}

.class-browser {
  margin-top: 16px;
  display: grid;
  grid-template-columns: 250px minmax(290px, 430px) minmax(0, 1fr);
  gap: 14px;
  align-items: start;
}

.class-sidebar,
.class-content-panel,
.class-detail-panel {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 10px 30px rgba(31, 35, 40, 0.06);
}

.class-sidebar {
  position: sticky;
  top: 14px;
  max-height: calc(100vh - 28px);
  overflow: hidden;
  padding: 12px;
}

.class-list {
  max-height: calc(100vh - 74px);
}

.class-group-title {
  margin: 12px 4px 6px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.class-group-title:first-child {
  margin-top: 0;
}

.class-content-panel {
  position: sticky;
  top: 14px;
  max-height: calc(100vh - 28px);
  overflow: hidden;
}

.class-title-block {
  padding: 16px 16px 12px;
  border-bottom: 1px solid var(--line);
}

.class-title-block h2 {
  margin: 6px 0 8px;
  font-size: 22px;
  line-height: 1.25;
}

.class-title-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}

.class-title-meta span {
  border-radius: 999px;
  background: #eef3ef;
  color: var(--muted);
  padding: 3px 8px;
  font-size: 12px;
}

.class-subtabs {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
}

.class-subtab {
  flex: 0 0 auto;
  height: 34px;
  padding: 0 11px;
  border-radius: 999px;
  background: #f8faf8;
  color: var(--text);
  border-color: var(--line);
}

.class-subtab span {
  margin-left: 4px;
  color: var(--muted);
  font-size: 12px;
}

.class-subtab.active {
  background: var(--brand);
  color: #fff;
  border-color: var(--brand);
}

.class-subtab.active span {
  color: rgba(255, 255, 255, 0.8);
}

.class-items {
  max-height: calc(100vh - 190px);
  overflow: auto;
  padding: 10px;
}

.class-detail-panel {
  min-height: 520px;
  overflow: hidden;
}

.class-meta-grid {
  display: grid;
  gap: 10px;
}

.class-meta-grid div {
  display: grid;
  gap: 4px;
  padding: 10px;
  border-radius: 10px;
  background: #f8faf8;
}

.class-meta-grid strong {
  color: var(--brand);
  font-size: 12px;
}

.class-meta-grid span {
  color: var(--text);
  line-height: 1.55;
}

.feature-block {
  margin-top: 12px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fbfcfb;
}

.feature-block h5 {
  margin: 0 0 8px;
  color: var(--text);
  font-size: 16px;
}

.feature-block p {
  margin: 0;
  line-height: 1.72;
  white-space: pre-wrap;
}

.favored-list {
  display: grid;
  gap: 10px;
}

.favored-option h5 {
  color: var(--brand);
}

@media (max-width: 760px) {
  .controls {
    grid-template-columns: 1fr;
  }

  input {
    min-width: 0;
    width: 100%;
  }

  .feat-browser {
    grid-template-columns: 1fr;
  }

  .class-browser {
    grid-template-columns: 1fr;
  }

  .book-sidebar,
  .feat-list-panel,
  .class-sidebar,
  .class-content-panel {
    position: static;
    max-height: none;
  }

  .book-list {
    max-height: 190px;
  }

  .feat-list {
    max-height: 360px;
  }

  .class-list,
  .class-items {
    max-height: 360px;
  }
}