/* 阅读精读专用样式，基础设计令牌复用 intensive.css。 */

.piece-section {
  scroll-margin-top: 88px;
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 12px 36px rgba(14, 21, 49, 0.055);
}

.piece-section + .piece-section {
  margin-top: 22px;
}

.piece-progress {
  display: inline-block;
  margin-left: 8px;
  padding: 2px 8px;
  color: var(--forest);
  background: #e7e9ef;
  border-radius: 999px;
  font-size: 10px;
  font-weight: 800;
}

.reading-overview {
  padding: 22px 26px 20px;
  background: linear-gradient(180deg, #f7f8f3, #ffffff);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 12px 36px rgba(14, 21, 49, 0.05);
}

.reading-overview h2 {
  margin: 0;
  color: var(--forest-deep);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 26px;
  line-height: 1.25;
}

.reading-overview p {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.7;
}

.reading-overview .hero-stats {
  margin-top: 14px;
}

/* ------------------------------------------------------------ 级联导航 */

.piece-navigation details {
  border-bottom: 1px solid #e5e6eb;
}

.piece-navigation details:last-child {
  border-bottom: 0;
}

.piece-navigation summary {
  padding: 11px 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  color: #3d435b;
  font-size: 12px;
  font-weight: 800;
  cursor: pointer;
  list-style: none;
}

.piece-navigation summary::-webkit-details-marker {
  display: none;
}

.piece-navigation summary::before {
  content: "▸";
  margin-right: 6px;
  color: #9094a4;
  font-size: 10px;
}

.piece-navigation details[open] > summary::before {
  content: "▾";
  color: var(--forest);
}

.piece-navigation summary > span:first-of-type {
  flex: 1;
}

.nav-count {
  color: #838795;
  font-size: 10px;
  font-weight: 700;
  white-space: nowrap;
}

.nav-month > summary {
  padding-left: 24px;
  font-weight: 700;
}

.nav-set > summary {
  padding-left: 34px;
  color: #555b72;
  font-weight: 700;
}

.nav-piece-list {
  padding: 2px 8px 10px 34px;
  display: grid;
  gap: 5px;
}

.nav-piece-link {
  padding: 8px 10px;
  display: grid;
  gap: 3px;
  color: #4d536a;
  background: #f8f7f5;
  border: 1px solid #e4e5ea;
  border-radius: 7px;
  text-decoration: none;
}

.nav-piece-link:hover {
  border-color: #bcc0d0;
}

.nav-piece-link.is-active {
  color: var(--forest-deep);
  background: var(--forest-soft);
  border-color: #b4b8ca;
  box-shadow: inset 3px 0 0 var(--gold);
}

.nav-piece-name {
  font-size: 11px;
  font-weight: 800;
}

.nav-piece-range {
  color: #858997;
  font-size: 10px;
}

/* ------------------------------------------------------------ 选项与作答 */

.option-translation {
  grid-column: 1 / -1;
  margin: 3px 0 0;
  color: #7c7f8d;
  font-size: 12px;
  line-height: 1.6;
}

.question-option.is-letter-option {
  align-items: flex-start;
}

.question-options.is-letter-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(46px, 1fr));
  gap: 8px;
}

.question-options.is-letter-grid .question-option {
  min-height: 46px;
  padding: 0;
  display: grid;
  place-items: center;
  border-radius: 8px;
}

.question-options.is-letter-grid .option-letter {
  font-size: 15px;
  font-weight: 800;
}

.question-feedback.is-revealed {
  color: #7c7f8d;
}

/* ------------------------------------------------------------ 选词填空 */

.piece-section.is-cloze .paragraph-chinese {
  display: none;
}

.piece-section.is-cloze.is-translation-shown .paragraph-chinese {
  display: block;
}

.cloze-translation-toggle {
  min-height: 40px;
  padding: 0 13px;
  align-self: flex-start;
  color: var(--forest);
  background: var(--surface);
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  font-size: 11px;
  font-weight: 800;
  cursor: pointer;
}

.cloze-translation-toggle:hover {
  border-color: #8e94ad;
}

.cloze-practice {
  margin: 0 26px 22px;
  padding: 18px;
  background: #f8f7f4;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.cloze-practice-head,
.piece-replacement-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
}

.cloze-practice-head strong,
.piece-replacement-head strong {
  color: var(--forest-deep);
  font-size: 14px;
}

.cloze-practice-head span,
.piece-replacement-head span {
  color: #7f8391;
  font-size: 11px;
}

.word-bank {
  margin-top: 13px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(132px, 1fr));
  gap: 8px;
}

.word-bank-chip {
  min-height: 46px;
  padding: 6px 10px;
  display: grid;
  grid-template-columns: 20px minmax(0, 1fr);
  align-items: center;
  gap: 7px;
  color: var(--ink);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  text-align: left;
  cursor: pointer;
}

.word-bank-chip:hover {
  border-color: #8e94ad;
}

.word-bank-chip > i {
  color: var(--forest);
  font-style: normal;
  font-weight: 900;
}

.word-bank-chip > span {
  min-width: 0;
  overflow: hidden;
  font-size: 13px;
  font-weight: 700;
  text-overflow: ellipsis;
}

.word-bank-levels {
  grid-column: 2;
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  color: #7f8391;
  font-size: 10px;
}

.blank-rows {
  margin-top: 14px;
  display: grid;
  gap: 9px;
}

.blank-row {
  padding: 11px;
  display: grid;
  grid-template-columns: 30px minmax(120px, 200px) minmax(0, 1fr) auto;
  align-items: center;
  gap: 9px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.blank-row.is-answered {
  border-color: #b9bdcb;
}

.blank-row.is-correct {
  background: #f1f8f2;
  border-color: #a9cdb2;
}

.blank-row.is-wrong {
  background: #fdf4f2;
  border-color: #e2b3ac;
}

.blank-number {
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  color: var(--forest);
  background: #e7e8ee;
  border-radius: 7px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 12px;
  font-weight: 800;
}

.blank-select {
  width: 100%;
  min-height: 40px;
  padding: 0 9px;
  color: var(--ink);
  background: #fbfbfc;
  border: 1px solid var(--line);
  border-radius: 7px;
  font-size: 12px;
  font-weight: 700;
}

.blank-select:focus {
  border-color: #757fa6;
  box-shadow: 0 0 0 3px rgba(77, 90, 143, 0.12);
  outline: 0;
}

.blank-status {
  color: #7f8391;
  font-size: 11px;
  font-weight: 700;
}

.blank-status.is-correct {
  color: #2f7a4b;
}

.blank-status.is-wrong {
  color: #b14a3e;
}

.blank-analysis-toggle {
  min-height: 36px;
  padding: 0 11px;
  color: var(--forest);
  background: #eeeff3;
  border: 1px solid #d6d8e2;
  border-radius: 7px;
  font-size: 11px;
  font-weight: 800;
  cursor: pointer;
  white-space: nowrap;
}

.blank-analysis {
  grid-column: 1 / -1;
  padding: 12px;
  display: grid;
  gap: 8px;
  background: #f7f8fa;
  border: 1px dashed #d2d5df;
  border-radius: 7px;
}

.blank-analysis p {
  margin: 0;
  color: #515567;
  font-size: 12px;
  line-height: 1.75;
}

.blank-answer strong {
  color: var(--forest);
}

.blank-answer span {
  color: var(--forest-deep);
  font-weight: 800;
}

.blank-answer em {
  margin-left: 6px;
  color: #8a6d2a;
  font-size: 11px;
  font-style: normal;
  font-weight: 800;
}

.blank-rivals {
  margin: 0;
  padding-left: 16px;
  display: grid;
  gap: 5px;
  color: #666a79;
  font-size: 11px;
  line-height: 1.7;
}

.blank-rivals strong {
  margin-right: 6px;
  color: var(--coral);
  font-family: Georgia, "Times New Roman", serif;
}

.cloze-actions {
  margin-top: 14px;
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
}

.blank-slot {
  margin: 0 2px;
  padding: 2px 6px;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  vertical-align: baseline;
  color: var(--forest-deep);
  background: #eeeff3;
  border: 1px solid #c9cddc;
  border-radius: 6px;
  font-family: inherit;
  font-size: 0.82em;
  font-weight: 800;
  cursor: pointer;
}

.blank-slot-number {
  color: #828695;
  font-size: 0.82em;
}

.blank-slot-pick {
  min-width: 14px;
  text-align: center;
  font-family: Georgia, "Times New Roman", serif;
}

.blank-slot.is-correct {
  color: #2f7a4b;
  background: #e8f6ec;
  border-color: #a9cdb2;
}

.blank-slot.is-wrong {
  color: #b14a3e;
  background: #fdeceb;
  border-color: #e2b3ac;
}

/* -------------------------------------------- 选词填空替换与固定搭配 */

.blank-replacement-block {
  grid-column: 1 / -1;
  padding-top: 10px;
  display: grid;
  gap: 9px;
  border-top: 1px dashed #d2d5df;
}

.blank-replacement-label {
  color: #7f8391;
  font-size: 10px;
  font-weight: 900;
  letter-spacing: 0.06em;
}

.blank-replacement-grid {
  display: grid;
  gap: 9px;
}

.blank-word-card {
  padding: 10px 12px;
  display: grid;
  gap: 6px;
  background: var(--surface);
  border: 1px solid #dddfe7;
  border-radius: 8px;
}

.blank-word-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 7px;
}

.blank-word-head strong {
  color: var(--forest-deep);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 15px;
}

.blank-word-head span {
  color: #7f8391;
  font-size: 11px;
}

.blank-word-meaning {
  margin: 0;
  color: #515567;
  font-size: 12px;
  line-height: 1.7;
}

.blank-collocations {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.blank-collocation-chip {
  padding: 5px 9px;
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  color: var(--forest);
  background: #f2f3f7;
  border: 1px solid #d9dbe5;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 700;
  cursor: pointer;
}

.blank-collocation-chip:hover {
  border-color: #8e94ad;
}

.blank-collocation-chip em {
  color: #7f8391;
  font-size: 10px;
  font-style: normal;
  font-weight: 600;
}

.blank-replacement-empty {
  margin: 0;
  color: #8b8f9d;
  font-size: 11px;
}

/* ------------------------------------------------------ 同义替换词块 */

.piece-replacement-block {
  margin: 0 26px 22px;
  padding: 16px 18px;
  background: #f8f6ef;
  border: 1px solid #e6dfc9;
  border-radius: 8px;
}

.piece-replacement-block .synonym-candidates {
  margin-top: 11px;
}

.synonym-block {
  margin-top: 12px;
  padding: 13px 14px;
  display: grid;
  gap: 11px;
  background: #f8f6ef;
  border: 1px solid #e6dfc9;
  border-radius: 8px;
}

.synonym-label {
  color: #8a6d2a;
  font-size: 10px;
  font-weight: 900;
  letter-spacing: 0.06em;
}

.synonym-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: stretch;
  gap: 9px;
}

.synonym-arrow {
  align-self: center;
  color: var(--gold);
  font-size: 15px;
  font-weight: 900;
}

.synonym-side {
  min-width: 0;
  padding: 10px 11px;
  display: grid;
  gap: 5px;
  background: var(--surface);
  border: 1px solid #e2dcc8;
  border-radius: 8px;
}

.synonym-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px;
}

.synonym-head strong {
  color: var(--forest-deep);
  font-size: 13px;
  line-height: 1.45;
  word-break: break-word;
}

.synonym-role {
  padding: 1px 6px;
  color: #8a6d2a;
  background: #f4ead1;
  border-radius: 999px;
  font-size: 10px;
  font-weight: 800;
}

.synonym-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
}

.synonym-phonetic {
  color: #7f8391;
  font-size: 11px;
}

.synonym-meaning {
  margin: 0;
  color: #515567;
  font-size: 12px;
  line-height: 1.7;
}

.synonym-meaning.is-muted {
  color: #9396a4;
}

.synonym-candidates {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 7px;
}

.synonym-candidates-label {
  color: #8a6d2a;
  font-size: 10px;
  font-weight: 900;
}

.synonym-chip {
  padding: 5px 9px;
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  color: var(--forest);
  background: var(--surface);
  border: 1px solid #ded6bf;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 800;
  cursor: pointer;
}

.synonym-chip:hover {
  border-color: var(--gold);
}

.synonym-chip-text {
  font-family: Georgia, "Times New Roman", serif;
}

.synonym-chip em {
  color: #8b8f9d;
  font-size: 10px;
  font-style: normal;
  font-weight: 600;
}

.word-synonyms .synonym-candidates {
  align-items: stretch;
}

/* --------------------------------------- 段落匹配逐题考点词与搭配 */

.analysis-chips {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 7px;
}

.analysis-chips .synonym-chip {
  padding: 4px 9px;
  font-size: 11.5px;
}

.analysis-hint {
  margin-top: 7px;
  color: #8b8f9d;
  font-size: 11.5px;
  line-height: 1.6;
}

.analysis-row .key-word-chip.phrase-chip {
  padding: 3px 9px;
}

/* ------------------------------------------------------------ 响应式 */

/* 篇目导航跟随正文一起滚动，避免长文阅读时"年份 / 月份"面板一直悬停遮挡内容 */
.reading-intensive-page .piece-navigation {
  position: static;
  top: auto;
  max-height: none;
  overflow: visible;
}

@media (max-width: 900px) {
  .piece-navigation {
    display: block;
    padding: 0;
    overflow: visible;
    max-height: none;
  }

  .piece-navigation details {
    border-bottom: 1px solid #e5e6eb;
  }

  .cloze-practice,
  .piece-replacement-block {
    margin-right: 18px;
    margin-left: 18px;
  }
}

@media (max-width: 640px) {
  .reading-overview {
    padding: 18px;
  }

  .reading-overview h2 {
    font-size: 21px;
  }

  .piece-head {
    padding: 18px;
    flex-direction: column;
    align-items: stretch;
  }

  .piece-head h2 {
    font-size: 22px;
  }

  .cloze-translation-toggle,
  .piece-play-button {
    width: 100%;
  }

  .cloze-practice,
  .piece-replacement-block {
    margin: 0 14px 16px;
    padding: 14px;
  }

  .word-bank {
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  }

  .blank-row {
    grid-template-columns: 30px minmax(0, 1fr);
    gap: 8px;
  }

  .blank-select {
    grid-column: 2;
  }

  .blank-status {
    grid-column: 2;
  }

  .blank-analysis-toggle {
    grid-column: 1 / -1;
  }

  .blank-analysis {
    padding: 10px;
  }

  .synonym-row {
    grid-template-columns: minmax(0, 1fr);
  }

  .synonym-arrow {
    justify-self: center;
    transform: rotate(90deg);
  }
}

@media (prefers-reduced-motion: reduce) {
  .piece-section {
    scroll-behavior: auto;
  }
}