.learning-course[hidden] { display: none !important; }
.learning-eyebrow { display: block; color: var(--board-blue); font: 11px/1.7 var(--ce-font-sans); letter-spacing: .04em; }
.learning-field { display: flex; flex-direction: column; gap: 8px; min-width: 0; color: var(--board-muted); font: 11px/1.7 var(--ce-font-sans); }
.learning-field input, .learning-field select { width: 100%; min-width: 0; min-height: 41px; padding: 9px 11px; border: 1px solid var(--ce-border); border-radius: 9px; background: #fff; color: var(--board-ink); font: 12px/1.6 var(--ce-font-sans); }
.learning-secondary { min-height: 36px; padding: 8px 12px; border: 1px solid var(--shell-accent-line); border-radius: 9px; background: var(--board-paper); color: var(--shell-accent); font: 11px/1.6 var(--ce-font-sans); cursor: pointer; }
.learning-secondary:hover { border-color: var(--shell-accent); background: var(--shell-accent-soft); }
.learning-text-button { border: 0; padding: 4px 0; background: transparent; color: var(--board-blue); font: 11px/1.7 var(--ce-font-sans); cursor: pointer; }
.learning-course button:focus-visible { outline: 2px solid var(--board-blue); outline-offset: 3px; }
.learning-course { position: fixed; left: 50%; top: 18px; width: min(400px, calc(100vw - 610px)); min-width: 220px; z-index: 51; transform: translateX(-50%); color: var(--board-ink); }
.learning-course-toggle { display: flex; align-items: center; justify-content: space-between; gap: 12px; width: 100%; padding: 10px 14px; border: 1px solid #d5e2e7; border-radius: 12px; background: var(--board-paper); box-shadow: 0 3px 14px #25344207; color: inherit; text-align: left; cursor: pointer; }
.learning-course-toggle > span:first-child { flex: 1; min-width: 0; }
.learning-course-toggle small { display: block; margin-bottom: 2px; color: var(--board-muted); font: 9px/1.5 var(--ce-font-sans); }
.learning-course-toggle strong { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font: 500 13px/1.6 var(--ce-font-sans); }
.learning-course-count { flex: none; color: var(--board-muted); font: 10px/1.6 var(--ce-font-sans); }
.learning-course-count > span { margin-left: 7px; }
.learning-course-panel { max-height: calc(100dvh - 130px); overflow-y: auto; margin-top: 7px; padding: 17px; border: 1px solid #d5e2e7; border-radius: 14px; background: var(--board-paper); box-shadow: 0 12px 32px #25344214; }
.learning-course-goal { margin: 0 0 15px; color: var(--board-muted); font: 11px/1.8 var(--ce-font-sans); }
.learning-course-panel ol { display: flex; flex-direction: column; gap: 5px; list-style: none; padding: 0; margin: 0; }
.learning-course-panel li > button { display: flex; align-items: center; gap: 10px; width: 100%; padding: 9px 8px; border: 1px solid transparent; border-radius: 8px; background: transparent; color: var(--board-ink); text-align: left; cursor: pointer; }
.learning-course-panel li > button[aria-current], .learning-course-panel li > button:hover { border-color: #c9dce3; background: #eef5f7; }
.learning-course-panel li > button > span { color: var(--board-blue); font: 15px/1 var(--board-hand); }
.learning-course-panel li strong, .learning-course-panel li small { display: block; font: 12px/1.7 var(--ce-font-sans); }
.learning-course-panel li small { color: var(--board-muted); font-size: 10px; }
.learning-course-actions { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 8px; margin-top: 15px; }
.learning-course-actions button:disabled { opacity: .45; cursor: default; }
.learning-course-note, .learning-course-finish { display: block; margin-top: 12px; font: 10px/1.7 var(--ce-font-sans); color: var(--board-muted); }
.learning-course-finish { margin: 0; }
.learning-card-marker { margin: 0 22px 8px; color: #538298; font: 10px/1.7 var(--ce-font-sans); }
.knowledge-node .learning-guide { margin: 6px 22px 14px; padding: 15px 0 0 15px; border-top: 1px solid #dbe6e9; border-left: 2px solid #76a9ba; color: var(--board-ink); }
.learning-guide-eyebrow { display: block; margin-bottom: 7px; color: #527f92; font: 10px/1.7 var(--ce-font-sans); }
.learning-guide p { margin: 0 0 12px; font: 12px/1.85 var(--ce-font-sans); overflow-wrap: anywhere; }
.learning-guide-actions { display: flex; align-items: center; gap: 8px 14px; flex-wrap: wrap; }
.knowledge-node .learning-guide-primary { max-width: 100%; min-height: 38px; padding: 9px 13px; border: 1px solid var(--shell-accent); border-radius: 8px; background: var(--shell-accent); color: var(--shell-accent-ink); font: 12px/1.65 var(--ce-font-sans); text-align: left; overflow-wrap: anywhere; cursor: pointer; }
.knowledge-node .learning-guide-primary:hover { border-color: var(--shell-accent-hover); background: var(--shell-accent-hover); }
.knowledge-node .learning-guide-secondary { max-width: 100%; min-height: 36px; padding: 5px 0; border: 0; background: transparent; color: var(--shell-accent); font: 11px/1.65 var(--ce-font-sans); text-align: left; overflow-wrap: anywhere; cursor: pointer; }
.learning-guide-secondary:hover { text-decoration: underline; }
.learning-guide-note { display: block; margin-top: 10px; color: var(--board-muted); font: 10px/1.8 var(--ce-font-sans); }
.learning-guide-summary h3 { margin: 3px 0 10px; font: 500 18px/1.6 var(--board-hand); }
.learning-guide-progress { margin: 12px 0 7px; color: #356c82; font: 11px/1.7 var(--ce-font-sans); }
.learning-guide-checklist { list-style: none; margin: 0; padding: 0; }
.learning-guide-checklist li { display: flex; align-items: center; justify-content: space-between; gap: 12px; border-bottom: 1px dashed #dbe6e9; }
.learning-guide-checklist li > span { flex: none; color: var(--board-muted); font: 10px/1.7 var(--ce-font-sans); }
.knowledge-node .learning-explorations { padding: 0 22px 10px; }
.knowledge-node .learning-explorations .chat-branches { padding: 8px 0 0; border: 0; }
.knowledge-expanded:not([data-shell-phase="complete"]) .learning-guide,
.knowledge-expanded:not([data-shell-phase="complete"]) .learning-explorations { visibility: hidden; pointer-events: none; }
body.account-mode #learning-course { display: none; }
.learner-profile { margin: 28px 0 24px; padding: 28px; border: 1px solid var(--ce-border); border-radius: 16px; background: var(--board-paper); }
.learner-profile-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 20px; }
.learner-profile-head h2 { margin: 5px 0 8px; color: var(--board-ink); font: 500 26px/1.5 var(--board-hand); }
.learner-profile-head p { margin: 0; color: var(--board-muted); font: 11px/1.9 var(--ce-font-sans); }
.learner-topic-count { flex: none; margin-top: 29px; color: var(--board-muted); font-size: 10px; }
.learner-model-summary { margin: 14px 0 0; color: var(--board-blue); font: 11px/1.8 var(--ce-font-sans); }
.learner-model-summary:empty { display: none; }
.learner-preferences { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); align-items: end; gap: 13px; margin: 25px 0 22px; padding-bottom: 22px; border-bottom: 1px dashed #d0dde2; }
.learner-preferences .learning-field-wide { grid-column: 1/-1; }
.learner-preferences > p { grid-column: 1/-1; margin: 0; color: var(--board-blue); font-size: 11px; }
.learner-preferences > p:empty { display: none; }
.learner-preferences > button { height: 41px; }
.learner-category-filters { display: flex; flex-wrap: wrap; gap: 7px; margin: 0 0 25px; }
.learner-category-filters button { padding: 6px 11px; border: 1px solid #dce4e7; border-radius: 20px; background: transparent; color: var(--board-muted); font-size: 11px; }
.learner-category-filters button[aria-pressed="true"] { background: var(--shell-accent-soft); border-color: var(--shell-accent-line); color: var(--shell-accent); }
.learner-category + .learner-category { margin-top: 27px; }
.learner-category h3 { margin: 0 0 10px; font: 500 13px/1.7 var(--ce-font-sans); color: #356b82; }
.learner-topic { border-top: 1px solid #dce4e7; }
.learner-topic:last-child { border-bottom: 1px solid #dce4e7; }
.learner-topic > summary { display: flex; align-items: center; gap: 18px; padding: 18px 0; list-style: none; cursor: pointer; }
.learner-topic > summary::-webkit-details-marker { display: none; }
.learner-topic-title { flex: 1; min-width: 0; }
.learner-topic-title strong { display: block; font-size: 14px; font-weight: 500; overflow-wrap: anywhere; }
.learner-topic-title > span { display: block; margin-top: 7px; color: var(--board-muted); font-size: 10px; }
.learner-topic-score { display: flex; align-items: center; gap: 14px; flex: none; }
.learner-topic-score > strong { min-width: 50px; text-align: right; color: var(--board-ink); font-size: 24px; font-weight: 500; font-variant-numeric: tabular-nums; }
.learner-topic-score > strong:only-child { font-size: 13px; }
.learner-topic-score small { margin-left: 2px; color: var(--board-muted); font-size: 11px; font-weight: 400; }
.learner-score-meter { display: inline-flex; gap: 3px; }
.learner-score-meter i { width: 6px; height: 20px; border-radius: 2px; background: #e4ecef; }
.learner-score-meter i.filled { background: #4396b6; }
.learner-topic-chevron { color: var(--board-muted); transition: transform 150ms; }
.learner-topic[open] .learner-topic-chevron { transform: rotate(180deg); }
.learner-topic-detail { padding: 0 0 14px 14px; border-left: 2px solid #c2dce5; }
.learner-topic-detail > p { margin: 0 0 14px; color: var(--board-muted); font: 11px/1.9 var(--ce-font-sans); }
.learner-concept + .learner-concept { margin-top: 15px; padding-top: 13px; border-top: 1px dashed #dce4e7; }
.learner-concept > div { display: flex; justify-content: space-between; gap: 15px; font-size: 11px; }
.learner-concept strong { font-weight: 500; }
.learner-concept > div span { flex: none; color: var(--board-muted); font-size: 10px; }
.learner-concept > p, .learner-concept blockquote { margin: 8px 0; font: 11px/1.9 var(--ce-font-sans); color: var(--board-muted); overflow-wrap: anywhere; }
.learner-concept blockquote { padding-left: 10px; border-left: 1px solid #d0dde2; }
.learner-empty { padding: 24px 0; }
.learner-empty strong { font: 500 21px/1.8 var(--board-hand); }
.learner-empty p, .learner-score-note { color: var(--board-muted); font: 10px/1.9 var(--ce-font-sans); }
.learner-score-note { margin: 22px 0 0; }
.learner-topic > summary:focus-visible { outline: 2px solid var(--board-blue); outline-offset: 3px; }
@media (max-width: 1050px) { .learning-course { top: 90px; left: auto; right: 18px; width: 300px; transform: none; } .learner-preferences { grid-template-columns: 1fr 1fr; } .learner-preferences > button { justify-self: start; } }
@media (max-width: 700px) {
  .learning-course { top: 90px; right: 12px; width: calc(100vw - 116px); min-width: 0; }
  .has-learning-course #workspace-status { top: 18px; max-width: calc(100vw - 230px); }
  .has-learning-course #workspace-status span#workspace-status-detail { display: none; }
  .knowledge-node .learning-guide-primary, .knowledge-node .learning-guide-secondary { min-height: 44px; }
  .learning-course-count { font-size: 8px; }
  .learning-course-toggle { padding: 9px 10px; gap: 7px; }
  .learning-course-panel { max-height: calc(100dvh - 240px); padding: 12px; }
  .learning-field input, .learning-field select { font-size: 16px; }
  .learner-profile { padding: 21px 17px; }
  .learner-profile-head { flex-direction: column; gap: 7px; }
  .learner-topic-count { margin-top: 0; }
  .learner-preferences { grid-template-columns: minmax(0, 1fr); }
  .learner-topic > summary { flex-wrap: wrap; gap: 12px; }
  .learner-topic-title { flex-basis: calc(100% - 30px); }
  .learner-topic-score { order: 2; width: 100%; justify-content: space-between; }
  .learner-topic-score > strong { text-align: left; }
  .learner-concept > div { flex-wrap: wrap; gap: 6px; }
}
@media (prefers-reduced-motion: reduce) { .learner-topic-chevron { transition: none; } }

/* 右侧大纲栏内：去掉浮动卡片的描边与阴影，按区块排 */
/* 栏内的大纲信息头：只是说明，不可点击 */
.learning-course-head {
  display: flex; align-items: flex-start; justify-content: space-between; gap: 12px;
  padding: 2px 4px 12px;
}
.learning-course-head > span:first-child { flex: 1; min-width: 0; }
.learning-course-head small { display: block; margin-bottom: 2px; color: var(--shell-ink-3); font: 9px/1.5 var(--ce-font-sans); }
.learning-course-head strong { display: block; overflow: hidden; text-overflow: ellipsis; font: 500 12.5px/1.6 var(--ce-font-sans); color: var(--shell-ink); }
.course-rail .learning-course-count { flex: none; color: var(--shell-ink-3); font: 10px/1.6 var(--ce-font-sans); }
.course-rail .learning-course-panel { border: 0; background: transparent; box-shadow: none; border-radius: 0; margin-top: 0; padding: 0; max-height: none; overflow: visible; }
.course-rail .learning-course-panel li > button { padding: 8px 6px; }