.journal-theme,
.article-content-theme {
  --journal-bg: #f7f6f1;
  --journal-surface: #f0efe7;
  --journal-surface-strong: #e8e8dd;
  --journal-border: #d5d8ca;
  --journal-text: #2e3933;
  --journal-muted: #616b5e;
  --journal-link: #46633b;
  background: var(--journal-bg);
  color: var(--journal-text);
}

.markdown-doc-surface {
  --md-text: #24292f;
  --md-muted: #57606a;
  --md-border: #d0d7de;
  --md-link: #0969da;

  background: #ffffff;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
  border-radius: 8px;
}

.markdown-doc-surface.markdown-doc-surface--ready {
  min-height: 0;
}

/* Grok 问答导出：问/答分段、轮次间距、问后分割线 */
.markdown-doc-surface .markdown-body.markdown-qa {
  display: block;
}

.markdown-doc-surface .markdown-qa__preamble {
  margin-bottom: 1.35rem;
}

.markdown-doc-surface .markdown-qa__round + .markdown-qa__round {
  margin-top: 2.35rem;
}

.markdown-doc-surface .markdown-qa__round {
  scroll-margin-top: 5rem;
}

/* 问题区：淡边框 + 左上「提问」角标，便于快速扫视定位 */
.markdown-doc-surface .markdown-qa__question {
  position: relative;
  margin-top: 0.35rem;
  margin-bottom: 0;
  padding: 1.25rem 0.9rem 0.85rem;
  border: 1px solid rgba(208, 215, 222, 0.5);
  border-radius: 6px;
  background: #d9efdc66;
}

.markdown-doc-surface .markdown-qa__question::before {
  content: "\63d0\95ee";
  position: absolute;
  top: -0.5rem;
  left: 0.65rem;
  padding: 0.1rem 0.35rem;
  font-size: 0.6875rem;
  font-weight: 500;
  line-height: 1.2;
  color: white;
  background: royalblue;
  border: 1px solid rgba(208, 215, 222, 0.45);
  border-radius: 3px;
  letter-spacing: 0.04em;
  pointer-events: none;
  user-select: none;
}

.markdown-doc-surface .markdown-qa__round > hr.markdown-qa__hr {
  margin: 1.35rem 0 0.5rem;
  border: 0;
  border-top: 1px solid var(--md-border);
}

.markdown-doc-surface .markdown-qa__answer {
  margin-top: 0;
}

.markdown-doc-surface .markdown-body {
  font-family:
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC",
    "Helvetica Neue", Helvetica, Arial, ui-sans-serif, system-ui, sans-serif;
  font-size: 1rem;
  line-height: initial;
  color: var(--md-text);
  -webkit-font-smoothing: antialiased;
}

.markdown-doc-surface .markdown-body > :first-child {
  margin-top: 0;
}

.markdown-doc-surface .markdown-body > :last-child {
  margin-bottom: 0;
}

.markdown-doc-surface .markdown-body p {
  margin-bottom: 1rem;
}

.markdown-doc-surface .markdown-body h1,
.markdown-doc-surface .markdown-body h2,
.markdown-doc-surface .markdown-body h3,
.markdown-doc-surface .markdown-body h4,
.markdown-doc-surface .markdown-body h5,
.markdown-doc-surface .markdown-body h6 {
  font-weight: 600;
  line-height: 1.35;
  color: var(--md-text);
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
  letter-spacing: -0.02em;
}

.markdown-doc-surface .markdown-body h1 {
  font-size: 1.5rem;
  padding-bottom: 0.35rem;
  border-bottom: 1px solid var(--md-border);
}

.markdown-doc-surface .markdown-body h2 {
  font-size: 1.3rem;
}

.markdown-doc-surface .markdown-body h3 {
  font-size: 1.15rem;
}

.markdown-doc-surface .markdown-body ul,
.markdown-doc-surface .markdown-body ol {
  margin-bottom: 1rem;
  padding-left: 1.5rem;
}

.markdown-doc-surface .markdown-body ul {
  list-style-type: disc;
}

.markdown-doc-surface .markdown-body ol {
  list-style-type: decimal;
}

.markdown-doc-surface .markdown-body li {
  margin-bottom: 0.35rem;
}

.markdown-doc-surface .markdown-body li > p {
  margin-bottom: 0.5rem;
}

.markdown-doc-surface .markdown-body ul ul,
.markdown-doc-surface .markdown-body ol ul {
  list-style-type: circle;
  margin-top: 0.35rem;
  margin-bottom: 0.35rem;
}

.markdown-doc-surface .markdown-body ul ul ul,
.markdown-doc-surface .markdown-body ol ol ul,
.markdown-doc-surface .markdown-body ul ol ul {
  list-style-type: square;
}

.markdown-doc-surface .markdown-body blockquote {
  margin: 1rem 0;
  padding: 0 0 0 1rem;
  border-left: 4px solid var(--md-border);
  color: var(--md-muted);
}

.markdown-doc-surface .markdown-body blockquote > :last-child {
  margin-bottom: 0;
}

.markdown-doc-surface .markdown-body hr {
  margin: 1.75rem 0;
  border: 0;
  border-top: 1px solid var(--md-border);
}

.markdown-doc-surface .markdown-body a {
  color: var(--md-link);
  text-decoration: none;
}

.markdown-doc-surface .markdown-body a:hover {
  text-decoration: underline;
}

.markdown-doc-surface .markdown-body strong {
  font-weight: 600;
  color: var(--md-text);
}

.markdown-doc-surface .markdown-body .katex-display,
.markdown-doc-surface .markdown-body .math-display {
  margin: 1.1rem 0;
  overflow-x: auto;
  overflow-y: hidden;
  padding-bottom: 0.15rem;
}

.markdown-doc-surface .markdown-body .math-display {
  display: block;
  background-color: aliceblue;
}

.markdown-doc-surface .markdown-body .katex {
  font-size: 1.04em;
}

.markdown-doc-surface .markdown-body .katex-display > .katex,
.markdown-doc-surface .markdown-body .math-display > .katex {
  font-size: 1.14em;
}

span.math {
  padding: 0 5px;
  border-radius: 3px;
  background-color: gainsboro;
}

/* 行内 code（排除代码块内的 code，避免与 highlight.js 冲突） */
.markdown-doc-surface .markdown-body :not(pre) > code {
  font-family:
    ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.9em;
  padding: 0;
  background: transparent;
  border-radius: 0;
  border: 0;
}

/* 显式声明代码块字体，避免依赖 Shadow DOM 外部的 Bootstrap 根变量。 */
.markdown-doc-surface .markdown-body pre,
.markdown-doc-surface .markdown-body pre code {
  font-family:
    SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New",
    monospace;
}

.markdown-doc-surface .markdown-body pre {
  overflow: visible;
  max-width: 100%;
  padding: 0.75rem 0;
  margin-bottom: 1rem;
  background: transparent;
  border: 0;
  border-radius: 0;
  font-size: 0.875rem;
  line-height: 1.6;
  white-space: pre-wrap;
  word-break: break-word;
  overflow-wrap: anywhere;
}

.markdown-doc-surface .markdown-body pre code {
  padding: 0;
  border: 0;
  font-size: inherit;
  background: transparent !important;
  white-space: pre-wrap;
  word-break: break-word;
  overflow-wrap: anywhere;
}

/* highlight.js 着色后的代码块（@section Head 中主题晚于 site.css，需覆盖背景/滚动/内边距） */
.markdown-doc-surface .markdown-body pre code.hljs {
  display: block;
  overflow: visible !important;
  padding: 0 !important;
  background: transparent !important;
  white-space: pre-wrap !important;
  word-break: break-word;
  overflow-wrap: anywhere;
}

/* 代码块工具栏（Article 正文由 article-code-blocks.js 包装） */
.markdown-doc-surface .markdown-body .code-block-shell {
  margin-bottom: 1rem;
  border: 1px solid var(--md-border);
  border-radius: 8px;
  background: #fff;
  overflow: hidden;
}

.markdown-doc-surface .markdown-body .code-block-shell__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.4rem 0.55rem 0.4rem 0.65rem;
  background: #f8f9fa;
  user-select: none;
}

.markdown-doc-surface
  .markdown-body
  .code-block-shell:not(.code-block-shell--collapsed)
  .code-block-shell__header {
  border-bottom: 1px solid var(--md-border);
}

.markdown-doc-surface .markdown-body .code-block-shell__label {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  min-width: 0;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--md-muted);
}

.markdown-doc-surface .markdown-body .code-block-shell__code-icon {
  display: inline-flex;
  color: #6e7781;
  flex-shrink: 0;
}

.markdown-doc-surface .markdown-body .code-block-shell__lang {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.markdown-doc-surface .markdown-body .code-block-shell__actions {
  display: flex;
  align-items: center;
  gap: 0.05rem;
  flex-shrink: 0;
}

.markdown-doc-surface .markdown-body .code-block-shell__btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  padding: 0;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: #57606a;
  cursor: pointer;
  transition:
    background-color 0.12s ease,
    color 0.12s ease;
}

.markdown-doc-surface .markdown-body .code-block-shell__btn:hover {
  background: rgba(31, 35, 40, 0.08);
  color: var(--md-text);
}

.markdown-doc-surface .markdown-body .code-block-shell__btn:focus-visible {
  outline: 2px solid var(--md-link);
  outline-offset: 1px;
}

.markdown-doc-surface
  .markdown-body
  .code-block-shell__btn
  .code-block-shell__svg {
  display: block;
}

.markdown-doc-surface .markdown-body .code-block-shell__body {
  background: #fff;
}

.markdown-doc-surface .markdown-body .code-block-shell__body pre {
  margin: 0;
  padding: 0.65rem 0.85rem 0.85rem;
}

.markdown-doc-surface
  .markdown-body
  .code-block-shell--collapsed
  .code-block-shell__body {
  display: none;
}

.markdown-doc-surface
  .markdown-body
  .code-block-shell__btn--toggle
  .code-block-shell__chevron {
  transition: transform 0.18s ease;
  display: block;
}

.markdown-doc-surface
  .markdown-body
  .code-block-shell__btn--toggle.is-collapsed
  .code-block-shell__chevron {
  transform: rotate(180deg);
}

.markdown-doc-surface .markdown-body table {
  width: 100%;
  margin-bottom: 1rem;
  border-collapse: collapse;
  font-size: 0.95rem;
  display: block;
  overflow-x: auto;
}

.markdown-doc-surface .markdown-body table th,
.markdown-doc-surface .markdown-body table td {
  border: 1px solid var(--md-border);
  padding: 0.5rem 0.75rem;
}

.markdown-doc-surface .markdown-body table th {
  font-weight: 600;
  background: #f6f8fa;
}

.markdown-doc-surface .markdown-body table tr:nth-child(even) {
  background: #fafbfc;
}

.markdown-doc-surface .markdown-body img {
  max-width: 100%;
  height: auto;
  border-radius: 6px;
}

.markdown-doc-surface .markdown-body video {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: auto 16 / 9;
  border-radius: 6px;
  background: #000;
}



.markdown-doc-surface .markdown-body .article-image-viewer__item {
  display: inline-block;
  max-width: 100%;
  border-radius: 6px;
  cursor: zoom-in;
}

.markdown-doc-surface .markdown-body .article-image-viewer__item:hover img {
  filter: brightness(0.96);
}

/* 兼容：未包在 .markdown-doc-surface 内的片段（如其它页） */
.markdown-body pre {
  overflow: visible;
  max-width: 100%;
  padding: 0.75rem 0;
  background: transparent;
  border-radius: 0;
  white-space: pre-wrap;
  word-break: break-word;
  overflow-wrap: anywhere;
}

.markdown-body pre code {
  background: transparent !important;
  white-space: pre-wrap;
  word-break: break-word;
  overflow-wrap: anywhere;
}

.markdown-body table {
  width: 100%;
  margin-bottom: 1rem;
}

.markdown-body img {
  max-width: 100%;
  height: auto;
}



.journal-article .markdown-doc-surface {
  --md-text: var(--journal-text);
  --md-muted: var(--journal-muted);
  --md-border: var(--journal-border);
  --md-link: var(--journal-link);
  background: transparent;
  border-radius: 0;
}

.journal-article .markdown-doc-surface .markdown-body {
  background: transparent;
}

.journal-article .markdown-doc-surface .markdown-body .code-block-shell,
.journal-article .markdown-doc-surface .markdown-body .code-block-shell__body,
.journal-article .markdown-doc-surface .markdown-body .math-display,
.journal-article .markdown-doc-surface .markdown-body span.math,
.journal-article .markdown-doc-surface .markdown-body table tr:nth-child(even) {
  background: var(--journal-surface);
}

.journal-article .markdown-doc-surface .markdown-body .code-block-shell__header,
.journal-article .markdown-doc-surface .markdown-body table th {
  background: var(--journal-surface-strong);
}

.journal-article .markdown-doc-surface .markdown-body .code-block-shell__btn {
  color: var(--md-muted);
}

.journal-article .markdown-doc-surface .markdown-body a {
  color: var(--md-link);
}

.journal-article .markdown-doc-surface .markdown-qa__question {
  background: var(--journal-surface);
  border-color: var(--md-border);
}

.journal-article .markdown-doc-surface .markdown-qa__question::before {
  background: var(--journal-link);
  border-color: var(--journal-link);
}