/* 科技主题黑／白正文富文本：官网与后台正文编辑器共用，只依赖 scheme.css 变量；课程选项卡等结构类名来自正文白名单。 */
:root {
  --font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

.prose {
  min-width: 0;
  color: var(--text);
  font: 16px/1.9 var(--font);
  overflow-wrap: anywhere;
}

.prose *,
.prose *::before,
.prose *::after {
  box-sizing: border-box;
}

.prose>:first-child {
  margin-top: 0;
}

.prose>:last-child {
  margin-bottom: 0;
}

.prose h1,
.prose h2,
.prose h3,
.prose h4 {
  margin: 1.8em 0 .6em;
  color: var(--kr-strong);
  font-weight: 700;
  line-height: 1.45;
  letter-spacing: 0;
}

.prose h1 {
  font-size: 26px;
}

.prose h2 {
  font-size: 22px;
}

.prose h3 {
  font-size: 18px;
}

.prose h4 {
  font-size: 16px;
}

.prose p {
  margin: 0 0 1.1em;
  text-indent: var(--prose-indent, 2em);
}

/* 列表、表格、图注、引用中的段落，含图片／视频／附件的段落及居中、右对齐段落不缩进。 */
.prose :is(li, td, th, figcaption, pre, blockquote) p,
.prose p:has(img, video, iframe, .attachment-card),
.prose .content-tab-panel>p,
.prose .curriculum-table p,
.prose :is([align="center"], [align="right"], [style*="text-align: center"], [style*="text-align:center"], [style*="text-align: right"], [style*="text-align:right"]),
.prose :is([align="center"], [align="right"], [style*="text-align: center"], [style*="text-align:center"], [style*="text-align: right"], [style*="text-align:right"]) p {
  text-indent: 0;
}

.prose a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.prose a:hover {
  color: var(--accent-hover);
}

.prose strong {
  color: var(--kr-strong);
  font-weight: 600;
}

.prose ul,
.prose ol {
  margin: 0 0 1.1em;
  padding-left: 1.5em;
}

.prose li {
  margin: .35em 0;
}

.prose img {
  display: block;
  max-width: 100%;
  height: auto !important;
  margin: 1.4em auto;
  border-radius: 4px;
}

.prose :is(video, iframe, table) {
  max-width: 100%;
}

.prose video {
  display: block;
  width: 100%;
  margin: 1.4em 0;
  border-radius: 4px;
  background: #000;
}

.prose iframe {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  margin: 1.4em 0;
  border: 1px solid var(--line);
  border-radius: 4px;
}

.prose table {
  display: block;
  overflow-x: auto;
  margin: 1.4em 0;
  border-collapse: collapse;
  font-size: 14px;
  line-height: 1.75;
  scrollbar-color: var(--line) transparent;
}

.prose table:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* 最小宽度避免窄屏把单元格压成一字一行，表格改为在自身容器内横向滚动。 */
.prose th,
.prose td {
  min-width: 5em;
  padding: 10px 14px;
  border: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.prose th {
  background: var(--panel-light);
  color: var(--kr-strong);
  font-weight: 600;
}

.prose td p {
  margin: .2em 0;
}

.prose td img {
  width: 100%;
  max-width: 400px;
  margin: .5em auto;
}

.prose :is(td, th).cell-prose {
  min-width: 280px;
}

.prose caption {
  padding-bottom: 10px;
  color: var(--kr-strong);
  font-weight: 600;
  text-align: left;
}

.prose code {
  padding: 2px 5px;
  border-radius: 3px;
  background: var(--panel-light);
  color: var(--text);
  font-family: var(--mono);
  font-size: .88em;
}

.prose pre {
  overflow-x: auto;
  margin: 1.4em 0;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--kr-code-bg);
  color: var(--text);
  font: 13px/1.8 var(--mono);
  white-space: pre;
  overflow-wrap: normal;
}

.prose pre code {
  padding: 0;
  background: none;
  font-size: inherit;
}

.prose blockquote {
  margin: 1.4em 0;
  padding: 14px 20px;
  border-left: 3px solid var(--accent);
  background: var(--panel-light);
}

.prose blockquote>:last-child {
  margin-bottom: 0;
}

.prose hr {
  margin: 2em 0;
  border: 0;
  border-top: 1px solid var(--line);
}

.prose figure {
  margin: 1.4em 0;
}

.prose figcaption,
.prose .image-caption {
  margin-top: 8px;
  color: var(--muted);
  font-size: 13px;
  text-align: center;
}

/* 旧图示的深色文字画在图片里，保留白色画布以免在深色主题中看不清。 */
.prose figure.media-illustration {
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: #ffffff;
}

.prose figure.media-illustration img {
  margin: 0 auto;
}

.prose figure.media-image img {
  display: inline-block;
  margin: 0;
}

.prose a.attachment-card {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin: 1.2em 0;
  padding: 16px 20px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--panel);
  color: var(--text);
  text-decoration: none;
}

.prose a.attachment-card:hover {
  border-color: var(--accent);
}

.prose .attachment-name {
  color: var(--kr-strong);
  font-weight: 600;
}

.prose .attachment-meta {
  color: var(--muted);
  font-size: 13px;
}

.prose a.attachment-link {
  overflow-wrap: anywhere;
}

.media-missing {
  display: block;
  margin: 1em 0;
  padding: 16px;
  border: 1px dashed var(--line);
  border-radius: 4px;
  background: var(--panel-light);
  color: var(--muted);
  font-size: 13px;
  overflow-wrap: anywhere;
}

.prose .content-tab-list {
  display: flex;
  overflow-x: auto;
  margin: 0 0 28px;
  padding: 0;
  border-bottom: 1px solid var(--line);
  list-style: none;
}

.prose .content-tab-list li {
  flex: 0 0 auto;
  margin: 0;
}

.prose .content-tab-list p {
  margin: 0;
}

.prose .content-tab-list a {
  display: block;
  margin-bottom: -1px;
  padding: 12px 22px;
  border-bottom: 2px solid transparent;
  color: var(--muted);
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
}

.prose .content-tab-list a:hover {
  color: var(--text);
}

.prose .content-tab-list a[aria-selected=true] {
  border-bottom-color: var(--accent);
  color: var(--kr-strong);
}

.prose .content-tab-list a:focus-visible,
.prose .content-tab-panel:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.prose .content-tab-panel[hidden] {
  display: none;
}

.prose .content-tab-panel {
  margin-bottom: 32px;
  scroll-margin-top: 100px;
}

.prose .content-tab-panel>h2 {
  margin-top: 0;
}

.prose table.curriculum-table {
  display: table;
  width: 100%;
  font-size: 15px;
}

.prose .curriculum-table :is(td, th) {
  padding: 12px 16px;
}

.prose .curriculum-table td:first-child:not(:only-child) {
  width: 20%;
  color: var(--accent);
  font-weight: 600;
}

.prose .curriculum-table td[rowspan] {
  text-align: center;
  vertical-align: middle;
}

.prose .curriculum-table ul {
  margin: .4em 0;
  padding-left: 1.2em;
}

.prose .curriculum-ai,
.prose .curriculum-note {
  margin: 12px 0 0;
  padding: 12px 16px;
  border-left: 3px solid var(--accent);
  background: var(--panel-light);
  font-size: 14px;
  text-indent: 0;
}

.prose .content-section {
  padding-block: 28px;
  border-top: 1px solid var(--line);
}

.prose .content-section:first-child {
  padding-top: 0;
  border-top: 0;
}

.prose .content-section>h2 {
  margin-top: 0;
}

.prose .content-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 2fr);
  gap: 28px;
  align-items: start;
}

.prose .content-split:has(>figure:last-child) {
  grid-template-columns: minmax(0, 2fr) minmax(0, 1fr);
}

.prose :is(.content-split, .content-stage)>figure {
  margin: 0;
}

.prose :is(.content-split, .content-stage)>figure img {
  margin: 0 auto;
}

.prose .content-copy>:first-child {
  margin-top: 0;
}

.prose .content-copy>:last-child {
  margin-bottom: 0;
}

.prose .content-stage {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr);
  gap: 24px;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}

.prose .content-stage:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.prose .content-stage>figure img {
  width: 120px;
}

.prose .content-stage .content-copy>p:first-child {
  color: var(--accent);
  font-weight: 600;
  text-indent: 0;
}

.prose .content-promises {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-top: 24px;
}

.prose .content-promises>figure {
  margin: 0;
  padding: 20px 12px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--panel-light);
  text-align: center;
}

.prose .content-promises img {
  width: 72px;
  height: 72px !important;
  margin: 0 auto 12px;
  object-fit: contain;
}

.prose .content-promises figcaption {
  margin: 0;
  color: var(--text);
  font-size: 14px;
  line-height: 1.7;
}

@media (max-width: 700px) {
  .prose {
    font-size: 15px;
  }

  .prose h2 {
    font-size: 20px;
  }

  .prose .content-tab-list a {
    padding: 10px 14px;
    font-size: 14px;
  }

  .prose table.curriculum-table {
    font-size: 14px;
  }

  .prose .curriculum-table :is(td, th) {
    padding: 10px;
  }

  .prose .content-split,
  .prose .content-split:has(>figure:last-child) {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .prose .content-stage {
    grid-template-columns: 72px minmax(0, 1fr);
    gap: 16px;
  }

  .prose .content-stage>figure img {
    width: 72px;
  }

  .prose .content-promises {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}