.study-mobile-switch {
  display: none;
}

@media (max-width: 760px) {
  .study-card-wrapper {
    border: 1px solid rgba(32, 35, 33, 0.08);
    border-radius: 18px;
    background: rgba(255, 253, 247, 0.94);
    box-shadow: 0 10px 28px rgba(33, 36, 31, 0.08);
    padding: 18px;
  }

  .study-card-wrapper > .study-mobile-switch {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 4px;
    margin-bottom: 14px;
    padding: 4px;
    background: rgba(32, 35, 33, 0.06);
    border-radius: 10px;
  }

  .study-card-wrapper > .study-mobile-switch .study-mobile-link {
    flex: 1;
    min-height: 40px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    color: var(--muted);
    font-size: 14px;
    font-weight: 700;
    text-decoration: none;
  }

  .study-card-wrapper > .study-mobile-switch .study-mobile-link.active {
    background: var(--cinnabar);
    color: #fffdf7;
    box-shadow: 0 2px 8px rgba(185, 65, 50, 0.24);
  }

  .study-card-wrapper .dq-subpage-card,
  .study-card-wrapper .dq-question-card,
  .study-card-wrapper .dq-intro-card,
  .study-card-wrapper .dq-meta-card,
  .study-card-wrapper .dq-toolbar {
    border: 0;
    border-radius: 0;
    background: transparent;
    box-shadow: none;
    padding: 0;
  }

  .study-card-wrapper .dq-subpage-card {
    padding: 0;
  }

  .study-card-wrapper .dq-subpage-stat {
    border: 0;
    border-radius: 0;
    background: transparent;
    box-shadow: none;
    padding: 8px 0;
  }

  .study-card-wrapper .panel,
  .study-card-wrapper .books-browser-panel,
  .study-card-wrapper .category-panel,
  .study-card-wrapper .books-overview-section {
    border: 0;
    border-radius: 0;
    background: transparent;
    box-shadow: none;
    padding: 0;
  }
}

.dq-main {
  min-width: 0;
}

.dq-shell {
  max-width: 1120px;
  margin: 0 auto;
  padding: 8px 0 28px;
}

.dq-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(280px, 0.6fr);
  gap: 16px;
  margin-bottom: 16px;
}

.dq-intro-card,
.dq-meta-card,
.dq-toolbar,
.dq-question-card,
.dq-subpage-card {
  border: 1px solid rgba(32, 35, 33, 0.08);
  border-radius: 18px;
  background: rgba(255, 253, 247, 0.94);
  box-shadow: 0 10px 28px rgba(33, 36, 31, 0.08);
}

.dq-intro-card {
  padding: 24px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.96), rgba(255, 246, 240, 0.92)),
    radial-gradient(circle at 88% 18%, rgba(185, 65, 50, 0.18), transparent 28%),
    radial-gradient(circle at 12% 82%, rgba(30, 111, 92, 0.16), transparent 24%);
}

.dq-intro-card .eyebrow {
  margin-bottom: 8px;
}

.dq-intro-card h2 {
  font-size: clamp(26px, 3vw, 40px);
  line-height: 1.2;
}

.dq-intro-card p {
  margin: 14px 0 0;
  color: var(--muted);
  line-height: 1.85;
}

.dq-intro-highlights {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.dq-intro-highlights span {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 0 12px;
  border-radius: 999px;
  background: rgba(185, 65, 50, 0.1);
  color: var(--cinnabar);
  font-size: 12px;
  font-weight: 800;
}

.dq-meta-card {
  display: grid;
  gap: 12px;
  padding: 18px;
}

.dq-meta-card h3 {
  font-size: 18px;
}

.dq-meta-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.dq-meta-grid div {
  min-height: 92px;
  display: grid;
  align-content: center;
  justify-items: center;
  gap: 6px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fffefb;
  text-align: center;
}

.dq-meta-grid strong {
  font-size: 24px;
}

.dq-meta-grid span {
  color: var(--muted);
  font-size: 12px;
}

.dq-toolbar {
  padding: 18px;
  margin-bottom: 16px;
}

.dq-toolbar-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.dq-toolbar-top h3 {
  font-size: 20px;
}

.dq-toolbar-top p {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.dq-toolbar-top h3:empty,
.dq-toolbar-top p:empty {
  display: none;
}

.dq-toolbar-top > div:has(h3:empty):has(p:empty) {
  display: none;
}

.dq-audience-tabs {
  display: inline-flex;
  width: auto;
  gap: 6px;
  padding: 6px;
  border-radius: 10px;
  background: rgba(32, 35, 33, 0.06);
}

.dq-audience-btn {
  min-height: 40px;
  padding: 0 16px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
}

.dq-audience-btn.active {
  background: var(--cinnabar);
  color: #fffdf7;
  box-shadow: 0 2px 8px rgba(185, 65, 50, 0.24);
}

.dq-list {
  display: grid;
  gap: 14px;
}

.dq-module-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.dq-module-card {
  width: 100%;
  display: grid;
  gap: 12px;
  padding: 18px;
  border: 1px solid rgba(32, 35, 33, 0.08);
  border-radius: 20px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(255, 249, 241, 0.92)),
    radial-gradient(circle at 88% 18%, rgba(185, 65, 50, 0.12), transparent 28%);
  box-shadow: 0 10px 28px rgba(33, 36, 31, 0.08);
  color: var(--ink);
  text-align: left;
  cursor: pointer;
}

.dq-module-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.dq-module-count {
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.dq-module-card h3 {
  margin: 0;
  font-size: 20px;
}

.dq-module-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.75;
}

.dq-module-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  color: var(--muted);
  font-size: 12px;
}

.dq-pill {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 0 10px;
  border-radius: 999px;
  background: rgba(30, 111, 92, 0.1);
  color: var(--jade);
  font-size: 11px;
  font-weight: 800;
}

.dq-pill.type {
  background: rgba(185, 65, 50, 0.1);
  color: var(--cinnabar);
}

.dq-pill.template {
  background: rgba(181, 138, 52, 0.12);
  color: var(--gold);
}

.dq-subpage {
  display: grid;
  gap: 16px;
}

/* 子页面模块标题（仅 intro 页使用） */
.dq-subpage-title-bar {
  margin: 0;
  font-size: 22px;
  font-weight: 800;
  color: var(--ink);
}

/* 答题子页面：固定布局，填满视口高度，按钮固定底部 */
.dq-subpage-mode .dq-shell {
  display: flex;
  flex-direction: column;
  min-height: calc(100vh - 56px);
  padding-bottom: 12px;
}

.dq-subpage-mode .study-card-wrapper {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
}

.dq-subpage-mode .dq-list {
  flex: 1;
  min-height: 0;
}

.dq-subpage-mode .dq-list .dq-quiz-subpage {
  height: 100%;
}

.dq-quiz-subpage {
  display: flex;
  flex-direction: column;
  gap: 12px;
  height: 100%;
  min-height: 0;
}

.dq-quiz-progress {
  margin: 0;
  flex-shrink: 0;
}

.dq-quiz-subpage .dq-question-card {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-height: 0;
}

.dq-quiz-subpage .dq-question-head {
  flex-shrink: 0;
}

.dq-question-body {
  flex: 1;
  overflow-y: auto;
  margin-top: 14px;
  padding-right: 4px;
  -webkit-overflow-scrolling: touch;
}

.dq-quiz-subpage .dq-quiz-nav {
  flex-shrink: 0;
  background: #fffdf7;
  padding-top: 12px;
}

.dq-subpage-header {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr) 72px;
  align-items: center;
  gap: 12px;
}

.dq-subpage-back,
.dq-feedback-trigger,
.dq-feedback-close {
  min-height: 40px;
  padding: 0 14px;
  border: 1px solid rgba(32, 35, 33, 0.1);
  border-radius: 999px;
  background: #fffefb;
  color: var(--ink);
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
}

.dq-subpage-back {
  justify-self: start;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.dq-subpage-title {
  margin: 0;
  text-align: center;
  font-size: clamp(24px, 3vw, 34px);
  line-height: 1.2;
}

.dq-subpage-spacer {
  display: block;
  width: 72px;
}

.dq-subpage-card {
  padding: 22px;
}

.dq-subpage-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.dq-subpage-stat {
  display: grid;
  gap: 6px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #fffefb;
  text-align: center;
}

.dq-subpage-stat span {
  color: var(--muted);
  font-size: 12px;
}

.dq-subpage-stat strong {
  font-size: 24px;
}

.dq-subpage-books {
  margin: 18px 0 0;
  color: var(--ink);
  line-height: 1.8;
}

.dq-subpage-actions {
  display: grid;
  gap: 12px;
  margin-top: 18px;
}

.dq-quiz-progress {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.dq-question-card {
  padding: 18px;
}

.dq-question-focus {
  margin: 0;
}

.dq-question-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.dq-question-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.dq-question-stem {
  margin: 14px 0 0;
  color: var(--ink);
  font-size: 16px;
  line-height: 1.8;
}

.dq-options {
  display: grid;
  gap: 10px;
  margin-top: 16px;
}

.dq-option-btn {
  width: 100%;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fffefb;
  color: var(--ink);
  text-align: left;
  cursor: pointer;
}

.dq-option-btn.active {
  border-color: var(--cinnabar);
  background: rgba(185, 65, 50, 0.06);
}

.dq-option-label {
  min-width: 24px;
  color: var(--cinnabar);
  font-weight: 800;
}

.dq-option-text {
  flex: 1;
  line-height: 1.7;
}

.dq-blank-wrap {
  margin-top: 16px;
}

.dq-blank-input {
  width: 100%;
  min-height: 48px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fffefb;
  color: var(--ink);
  font: inherit;
}

.dq-result {
  margin-top: 16px;
  padding: 14px 16px;
  border-radius: 14px;
  border: 1px solid rgba(32, 35, 33, 0.08);
}

.dq-result.correct {
  background: rgba(30, 111, 92, 0.08);
  border-color: rgba(30, 111, 92, 0.18);
}

.dq-result.wrong {
  background: rgba(185, 65, 50, 0.08);
  border-color: rgba(185, 65, 50, 0.18);
}

.dq-result-head {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
  font-weight: 800;
}

.dq-result-answer,
.dq-result-analysis {
  color: var(--ink);
  font-size: 14px;
  line-height: 1.8;
}

.dq-result-analysis {
  margin-top: 8px;
  color: var(--muted);
}

.dq-quiz-nav,
.dq-subpage-actions {
  display: grid;
  gap: 12px;
}

.dq-quiz-nav {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.dq-submit {
  min-height: 42px;
  padding: 0 16px;
  border: 0;
  border-radius: 999px;
  background: var(--cinnabar);
  color: #fffdf7;
  font-weight: 700;
  cursor: pointer;
  text-align: center;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.dq-submit.secondary {
  background: rgba(32, 35, 33, 0.08);
  color: var(--ink);
}

.dq-submit:disabled,
.dq-subpage-back:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.dq-feedback-modal {
  position: fixed;
  inset: 0;
  z-index: 40;
  display: grid;
  place-items: center;
  padding: 18px;
  background: rgba(20, 22, 20, 0.42);
}

.dq-feedback-dialog {
  width: min(100%, 420px);
  display: grid;
  gap: 14px;
  padding: 18px;
  border-radius: 20px;
  background: #fffdf7;
  box-shadow: 0 18px 48px rgba(20, 22, 20, 0.18);
}

.dq-feedback-dialog-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.dq-feedback-close {
  min-width: 40px;
  padding: 0;
}

.dq-feedback-types {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.dq-feedback-type {
  min-height: 36px;
  padding: 0 14px;
  border: 1px solid rgba(32, 35, 33, 0.1);
  border-radius: 999px;
  background: #fffefb;
  color: var(--ink);
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
}

.dq-feedback-type.active {
  border-color: var(--gold);
  background: rgba(181, 138, 52, 0.14);
  color: var(--gold);
}

.dq-feedback-textarea {
  width: 100%;
  min-height: 120px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #fffefb;
  color: var(--ink);
  font: inherit;
  resize: vertical;
}

.dq-feedback-actions {
  display: flex;
  justify-content: flex-end;
}

.dq-empty {
  padding: 42px 18px;
  border: 1px dashed var(--line);
  border-radius: 18px;
  background: #fffefb;
  color: var(--muted);
  text-align: center;
}

.dq-subpage-mode .dq-shell > .topbar {
  margin-bottom: 16px;
}

.dq-subpage-mode .study-card-wrapper > .study-mobile-switch,
.dq-subpage-mode .study-card-wrapper > .dq-hero,
.dq-subpage-mode .study-card-wrapper > .dq-toolbar,
.dq-subpage-mode .bottom-nav {
  display: none;
}

@media (max-width: 1120px) {
  .dq-hero,
  .dq-module-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .dq-shell {
    padding: 0 0 20px;
  }

  .dq-hero {
    display: none;
  }

  .dq-toolbar,
  .dq-question-card,
  .dq-subpage-card,
  .dq-feedback-dialog {
    border-radius: 16px;
  }

  .dq-toolbar {
    padding: 14px;
  }

  .dq-toolbar-top {
    flex-direction: column;
    align-items: stretch;
  }

  .dq-audience-tabs {
    width: 100%;
  }

  .dq-subpage-header {
    grid-template-columns: 64px minmax(0, 1fr) 64px;
    gap: 8px;
  }

  .dq-subpage-title {
    font-size: 24px;
  }

  .dq-subpage-spacer {
    width: 64px;
  }

  .dq-question-stem {
    font-size: 15px;
  }

  .dq-feedback-modal {
    padding: 12px;
  }
}

@media (max-width: 480px) {
  .dq-quiz-nav {
    gap: 8px;
  }

  .dq-submit,
  .dq-subpage-back,
  .dq-feedback-trigger,
  .dq-feedback-close {
    font-size: 13px;
    padding: 0 10px;
  }
}

/* ===== 题目头部图标按钮 ===== */
.dq-question-head-actions {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.dq-icon-btn {
  min-width: 36px;
  min-height: 36px;
  padding: 0 8px;
  border: 1px solid rgba(32, 35, 33, 0.1);
  border-radius: 999px;
  background: #fffefb;
  color: var(--ink);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
}

.dq-icon-btn:hover {
  border-color: var(--cinnabar);
  color: var(--cinnabar);
}

.dq-icon-btn svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

/* ===== 题号导航网格弹窗 ===== */
.dq-grid-modal {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: grid;
  place-items: center;
  padding: 18px;
  background: rgba(20, 22, 20, 0.5);
}

.dq-grid-dialog {
  width: min(100%, 560px);
  max-height: 80vh;
  display: flex;
  flex-direction: column;
  background: #fffdf7;
  border: 1px solid var(--line);
  border-radius: 16px;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.12);
  overflow: hidden;
}

.dq-grid-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 18px;
  border-bottom: 1px solid var(--line);
}

.dq-grid-title {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
  flex: 1;
  min-width: 0;
}

.dq-grid-close {
  width: 32px;
  height: 32px;
  border: 0;
  border-radius: 50%;
  background: rgba(32, 35, 33, 0.06);
  color: var(--ink);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all 0.2s;
}

.dq-grid-close:hover {
  background: rgba(32, 35, 33, 0.12);
}

.dq-grid-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  padding: 12px 18px;
  border-bottom: 1px solid var(--line);
  font-size: 12px;
  color: var(--muted);
}

.dq-grid-legend-item {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.dq-grid-dot {
  display: inline-block;
  width: 12px;
  height: 12px;
  border-radius: 4px;
  border: 1px solid var(--line);
  flex-shrink: 0;
}

.dq-grid-dot.current {
  background: var(--cinnabar);
  border-color: var(--cinnabar);
}

.dq-grid-dot.correct {
  background: #34a853;
  border-color: #34a853;
}

.dq-grid-dot.wrong {
  background: #fde2e0;
  border-color: #e6a8a2;
}

.dq-grid-dot.unanswered {
  background: #fffefb;
}

.dq-grid-body {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(44px, 1fr));
  gap: 8px;
  padding: 16px 18px;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.dq-grid-cell {
  min-height: 44px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fffefb;
  color: var(--ink);
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s;
}

.dq-grid-cell:hover {
  border-color: var(--cinnabar);
  transform: scale(1.05);
}

.dq-grid-cell.current {
  background: var(--cinnabar);
  border-color: var(--cinnabar);
  color: #fffdf7;
}

.dq-grid-cell.correct {
  background: #34a853;
  border-color: #34a853;
  color: #fffdf7;
}

.dq-grid-cell.wrong {
  background: #fde2e0;
  border-color: #e6a8a2;
  color: #b94132;
}

.dq-grid-cell.unanswered {
  background: #fffefb;
  color: var(--muted);
}

.dq-grid-loading {
  padding: 40px 18px;
  text-align: center;
  color: var(--muted);
  font-size: 14px;
}

@media (max-width: 760px) {
  .dq-grid-dialog {
    max-height: 85vh;
  }
  .dq-grid-body {
    grid-template-columns: repeat(auto-fill, minmax(38px, 1fr));
    gap: 6px;
  }
  .dq-grid-cell {
    min-height: 38px;
    font-size: 13px;
  }
}

/* ===== 答题进度保存确认弹窗 ===== */
.dq-progress-modal {
  position: fixed;
  inset: 0;
  z-index: 60;
  display: grid;
  place-items: center;
  padding: 18px;
  background: rgba(20, 22, 20, 0.5);
}

.dq-progress-dialog {
  width: min(100%, 380px);
  display: grid;
  gap: 14px;
  padding: 28px 22px 22px;
  background: #fffdf7;
  border: 1px solid var(--line);
  border-radius: 16px;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.12);
  text-align: center;
}

.dq-progress-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto;
  border-radius: 50%;
  background: rgba(185, 65, 50, 0.1);
  color: var(--cinnabar);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.dq-progress-icon svg {
  width: 28px;
  height: 28px;
}

.dq-progress-title {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
}

.dq-progress-desc {
  margin: 0;
  font-size: 13px;
  color: var(--muted);
  line-height: 1.7;
}

.dq-progress-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 6px;
}

.dq-progress-actions .dq-submit {
  min-height: 42px;
  font-size: 14px;
}

@media (max-width: 760px) {
  .dq-progress-dialog {
    width: min(100%, 340px);
    padding: 24px 18px 18px;
  }
}