/* ========================================
   知识内容 v2 样式（2026-09 内容重组）
   覆盖：知识卡列表/详情、任务简报、闯关知识卡流、难度标签、行动清单
   全部使用语义变量，双主题自动适配
   ======================================== */

/* ---- 难度/模板通用徽标 ---- */
.card-template,
.card-level,
.quiz-diff-tag,
.mix-tag {
  display: inline-flex;
  align-items: center;
  font-size: 11px;
  line-height: 1;
  padding: 3px 8px;
  border-radius: 999px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.card-template {
  background: var(--tag-time-bg);
  color: var(--accent-indigo);
}

.card-level.lv1,
.quiz-diff-tag.lv1 { background: rgba(16, 185, 129, 0.12); color: var(--status-emerald); }
.card-level.lv2,
.quiz-diff-tag.lv2 { background: rgba(59, 130, 246, 0.12); color: #2563EB; }
[data-theme="dark"] .card-level.lv2,
[data-theme="dark"] .quiz-diff-tag.lv2 { color: #60A5FA; }
.card-level.lv3,
.quiz-diff-tag.lv3 { background: rgba(245, 158, 11, 0.14); color: var(--status-amber); }
.card-level.lv4,
.quiz-diff-tag.lv4 { background: rgba(239, 68, 68, 0.12); color: var(--status-red); }

.card-meta {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 6px;
}

/* ---- 百科：知识卡列表 ---- */
.card-gist {
  color: var(--color-text-secondary);
  font-size: 13px;
  line-height: 1.6;
  margin: 4px 0 10px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ---- 百科：知识卡详情 ---- */
.card-gist-lg {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-surface-1);
  border-left: 3px solid var(--color-primary);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  margin: 4px 0 0;
}

.kp-card {
  display: flex;
  gap: 10px;
  align-items: flex-start;
}

.kp-step {
  flex: 0 0 auto;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 1px;
}

.kp-body h4 {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-primary);
  margin: 0 0 4px;
}

.key-points.as-checklist .kp-card {
  cursor: default;
}

.card-case {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: 4px;
}

.case-row {
  display: flex;
  gap: 10px;
  padding: 10px 14px;
  font-size: 14px;
  line-height: 1.65;
  align-items: flex-start;
}

.case-row p { margin: 0; color: var(--color-text-secondary); flex: 1; }
.case-row.before { background: var(--tag-no-bg); border-bottom: 1px solid var(--color-border-subtle); }
.case-row.after { background: var(--tag-ok-bg); }

.case-label {
  flex: 0 0 auto;
  font-size: 11px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 999px;
  margin-top: 1px;
}
.case-row.before .case-label { background: var(--tag-no-bg); color: var(--status-red); }
.case-row.after .case-label { background: var(--tag-ok-bg); color: var(--status-emerald); }

.case-why {
  padding: 8px 14px;
  font-size: 12px;
  color: var(--color-text-tertiary);
  background: var(--color-surface-1);
  border-top: 1px dashed var(--color-border);
}

.card-action {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  background: var(--tag-wait-bg);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  margin-top: 16px;
}

.card-action-label {
  flex: 0 0 auto;
  font-size: 11px;
  font-weight: 700;
  color: var(--status-amber);
  padding: 3px 8px;
  border: 1px solid var(--status-amber);
  border-radius: 999px;
  margin-top: 1px;
}

.card-action p { margin: 0; font-size: 14px; color: var(--color-text); }

.detail-content { line-height: 1.8; color: var(--color-text-secondary); font-size: 14px; }

/* ---- 闯关：任务简报 ---- */
.brief-step h3,
.read-step h3,
.quiz-step h3 { margin-top: 0; }

.brief-scqa {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 16px;
}

.brief-row {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  font-size: 14px;
  line-height: 1.7;
}

.brief-row p { margin: 0; color: var(--color-text); flex: 1; }

.brief-tag {
  flex: 0 0 auto;
  font-size: 11px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 999px;
  margin-top: 2px;
}

.brief-row.s .brief-tag { background: rgba(96, 165, 250, 0.14); color: #2563EB; }
.brief-row.c .brief-tag { background: rgba(245, 158, 11, 0.14); color: var(--status-amber); }
.brief-row.q .brief-tag { background: rgba(239, 68, 68, 0.12); color: var(--status-red); }
.brief-row.a .brief-tag { background: var(--tag-ok-bg); color: var(--status-emerald); }
[data-theme="dark"] .brief-row.s .brief-tag { color: #60A5FA; }

.brief-sub {
  font-size: 14px;
  color: var(--color-text-tertiary);
  margin: 14px 0 8px;
}

.guidebook {
  margin: 0 0 18px;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.guidebook li {
  position: relative;
  padding-left: 26px;
  font-size: 14px;
  color: var(--color-text);
  line-height: 1.6;
}

.guidebook li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 7px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--tag-ok-bg);
  color: var(--status-emerald);
}

.guidebook li::after {
  content: "✓";
  position: absolute;
  left: 5px;
  top: 6px;
  font-size: 10px;
  font-weight: 700;
  color: var(--status-emerald);
}

/* ---- 闯关：知识卡流 ---- */
.card-flow {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin: 14px 0;
}

.card-flow-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface-1);
  overflow: hidden;
}

.card-flow-item.done { border-left: 3px solid var(--status-emerald); }

.card-flow-head {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  cursor: pointer;
  user-select: none;
}

.card-flow-head:active { background: var(--color-surface-2); }

.cf-idx {
  flex: 0 0 auto;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--color-surface-2);
  color: var(--color-text-tertiary);
  font-size: 12px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.card-flow-item.open .cf-idx,
.card-flow-item:not(.done):hover .cf-idx {
  background: var(--color-primary);
  color: #fff;
}

.cf-title {
  flex: 1;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
}

.cf-tpl {
  flex: 0 0 auto;
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--tag-time-bg);
  color: var(--accent-indigo);
}

.read-check {
  color: var(--status-emerald);
  font-weight: 700;
}

.card-flow-body {
  padding: 0 14px 14px;
  border-top: 1px dashed var(--color-border);
}

.cf-gist {
  font-size: 15px;
  font-weight: 600;
  line-height: 1.7;
  color: var(--color-text);
  margin: 12px 0;
}

.cf-points {
  margin: 0 0 12px;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.cf-points li {
  font-size: 13px;
  line-height: 1.65;
  color: var(--color-text-secondary);
  padding-left: 2px;
}

.cf-points b {
  display: block;
  color: var(--color-primary);
  font-weight: 700;
  margin-bottom: 1px;
}

.cf-case {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  margin-bottom: 10px;
}

.cf-case-row {
  display: flex;
  gap: 8px;
  padding: 8px 12px;
  font-size: 13px;
  line-height: 1.6;
  align-items: flex-start;
}

.cf-case-row span {
  flex: 0 0 auto;
  font-size: 10px;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: 999px;
  margin-top: 2px;
}

.cf-case-row:first-child span { background: var(--tag-no-bg); color: var(--status-red); }
.cf-case-row:last-child span { background: var(--tag-ok-bg); color: var(--status-emerald); }
.cf-case-row p { margin: 0; color: var(--color-text-secondary); }
.cf-case-row:last-child { border-top: 1px solid var(--color-border-subtle); }

.cf-why {
  font-size: 12px;
  color: var(--color-text-tertiary);
  padding: 6px 12px;
  background: var(--color-surface-2);
}

.cf-action {
  display: flex;
  gap: 8px;
  align-items: center;
  background: var(--tag-wait-bg);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
}

.cf-action span {
  flex: 0 0 auto;
  font-size: 11px;
  font-weight: 700;
  color: var(--status-amber);
}

.cf-action p { margin: 0; font-size: 13px; color: var(--color-text); }

/* ---- 闯关：测验难度配比 ---- */
.quiz-mix {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 18px;
}

.mix-tag { font-size: 12px; }
.mix-tag.review { background: rgba(139, 92, 246, 0.14); color: #8B5CF6; }
[data-theme="dark"] .mix-tag.review { color: #A78BFA; }

.quiz-tag-row {
  display: flex;
  gap: 6px;
  align-items: center;
  margin-bottom: 8px;
}

.quiz-review-tag {
  font-size: 11px;
  padding: 3px 8px;
  border-radius: 999px;
  background: rgba(139, 92, 246, 0.14);
  color: #8B5CF6;
  font-weight: 600;
}
[data-theme="dark"] .quiz-review-tag { color: #A78BFA; }

/* ---- 闯关：结算清单与称号 ---- */
.stage-checklist {
  background: var(--color-surface-1);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  margin: 16px 0;
  text-align: left;
}

.stage-checklist h4 {
  margin: 0 0 10px;
  font-size: 14px;
  color: var(--color-text);
}

.stage-checklist ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.stage-checklist li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--color-text-secondary);
  cursor: pointer;
  padding: 4px 0;
  border-radius: var(--radius-sm);
}

.stage-checklist .ck-box {
  flex: 0 0 auto;
  width: 16px;
  height: 16px;
  border: 1.5px solid var(--color-border-strong);
  border-radius: 4px;
  margin-top: 2px;
  position: relative;
}

.stage-checklist li.checked { color: var(--color-text-tertiary); text-decoration: line-through; }
.stage-checklist li.checked .ck-box {
  background: var(--status-emerald);
  border-color: var(--status-emerald);
}

.stage-checklist li.checked .ck-box::after {
  content: "✓";
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 11px;
  font-weight: 700;
}

.stage-reward {
  display: inline-block;
  margin: 8px 0 4px;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-primary);
  background: var(--tag-time-bg);
  border-radius: 999px;
  padding: 6px 14px;
}

.stage-score {
  font-size: 12px;
  color: var(--color-text-tertiary);
  margin-top: 4px;
}

/* ---- 阅读器通用（常驻，避免按需 CSS 未加载时缺样式） ---- */
.article-reader {
  display: none;
  max-width: 760px;
  margin: 0 auto;
  padding: 8px 0 40px;
}

.reader-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-primary);
  background: rgba(94, 106, 210, 0.1);
  border: none;
  border-radius: 8px;
  padding: 8px 14px;
  cursor: pointer;
  margin-bottom: 16px;
}

.reader-back svg { width: 16px; height: 16px; }

.reader-article {
  background: var(--color-surface);
  border-radius: 16px;
  padding: 28px 32px;
  box-shadow: 0 2px 16px rgba(15, 23, 42, 0.06);
}

.reader-head { display: flex; flex-direction: column; gap: 6px; align-items: flex-start; }
.reader-head h2 { font-size: 24px; font-weight: 700; line-height: 1.35; margin: 0; color: var(--color-text); }
.reader-section-title { font-size: 16px; font-weight: 700; margin: 24px 0 12px; color: var(--color-text); }
.key-points { display: flex; flex-direction: column; gap: 10px; }

/* ---- 移动端触控优化：禁止文本选择劫持点击，去除点按高亮 ---- */
.quiz-option,
.card-flow-head,
.stage-checklist li,
.challenge-stage.clickable,
.filter-btn,
.btn-start,
.btn-start-quiz,
.quiz-nav-btn,
.reader-back {
  -webkit-user-select: none;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

/* 展开卡与题目区的滚动锚点偏移 */
.card-flow-item { scroll-margin-top: 12px; }
.quiz-question { scroll-margin-top: 12px; }

.challenge-stage.clickable { cursor: pointer; }
.challenge-stage.locked { cursor: default; }

/* ---- 小屏适配 ---- */
@media (max-width: 768px) {
  .reader-article { padding: 20px 16px; }
  .stage-checklist li { padding: 10px 0; font-size: 14px; }
}

/* ========================================
   错题本（查询模式内回顾面板）
   ======================================== */
.ency-topbar {
  display: flex;
  justify-content: flex-end;
  margin-bottom: 12px;
}

.challenge-tools {
  display: flex;
  justify-content: flex-end;
  margin: -6px 0 12px;
}

.mistake-toggle {
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid var(--color-border-strong);
  background: var(--color-surface-1);
  color: var(--color-text);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  -webkit-user-select: none;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

.mistake-toggle:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.mb-panel {
  max-width: 860px;
  margin: 0 auto;
}

.mb-titlebar {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.mb-titlebar h2 { margin: 8px 0 0; }
.mb-count {
  font-size: 13px;
  color: var(--color-text-tertiary);
}
.mb-hint {
  font-size: 13px;
  color: var(--color-text-tertiary);
  line-height: 1.6;
  margin: 8px 0 12px;
}
.mb-actions { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 8px; }
.mb-ghost {
  padding: 8px 16px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: transparent;
  color: var(--color-text-secondary);
  font-size: 13px;
  cursor: pointer;
}

.mb-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-top: 8px;
}

.mb-item {
  background: var(--color-surface-1);
  border: 1px solid var(--color-border);
  border-radius: 14px;
  padding: 16px;
}

.mb-item-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 8px;
}

.mb-source {
  font-size: 11px;
  font-weight: 600;
  color: var(--color-primary);
  background: var(--tag-time-bg);
  border-radius: 999px;
  padding: 3px 10px;
}
.mb-wrongcount {
  font-size: 12px;
  color: var(--color-text-tertiary);
}

.mb-q {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.55;
  margin-bottom: 10px;
}

.mb-ans {
  display: flex;
  gap: 8px;
  align-items: flex-start;
  font-size: 13px;
  line-height: 1.6;
  margin: 4px 0;
  color: var(--color-text-secondary);
}

.mb-tag {
  flex: 0 0 auto;
  font-size: 11px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 999px;
}
.mb-ans.wrong .mb-tag { background: var(--tag-no-bg); color: var(--status-red); }
.mb-ans.right .mb-tag { background: var(--tag-ok-bg); color: var(--status-emerald); }

.mb-item-actions {
  display: flex;
  gap: 14px;
  margin-top: 10px;
  border-top: 1px dashed var(--color-border);
  padding-top: 10px;
}

.mb-link {
  background: none;
  border: none;
  padding: 0;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-primary);
  cursor: pointer;
  -webkit-user-select: none;
  user-select: none;
}
.mb-link.danger { color: var(--color-text-tertiary); }

.mb-review-feedback {
  margin-top: 16px;
  padding: 10px 14px;
  border-radius: 10px;
  font-weight: 700;
  font-size: 14px;
}
.mb-review-feedback.ok { background: var(--tag-ok-bg); color: var(--status-emerald); }
.mb-review-feedback.bad { background: var(--tag-no-bg); color: var(--status-red); }

/* 错题重练选项基础样式（encyclopedia 模式也独立可用） */
.mb-review .quiz-option {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 14px 16px;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  background: var(--color-surface-1);
  color: var(--color-text);
  font-size: 14px;
  text-align: left;
  cursor: pointer;
  margin-bottom: 10px;
  -webkit-user-select: none;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}
.mb-review .quiz-option.correct { border-color: var(--status-emerald); background: var(--tag-ok-bg); }
.mb-review .quiz-option.wrong { border-color: var(--status-red); background: var(--tag-no-bg); }
.mb-review .option-letter {
  flex: 0 0 auto;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--color-surface-2);
  color: var(--color-text-secondary);
  font-size: 12px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
}