default.css

/**
 * MD 默认主题（经典主题）
 * 按 Alt/Option + Shift + F 可格式化
 * 如需使用主题色，请使用 var(--md-primary-color) 代替颜色值
 */

/* ==================== 一级标题 ==================== */
h1 {
  display: table;
  padding: 0 1em;
  border-bottom: 2px solid var(--md-primary-color);
  margin: 2em auto 1em;
  color: hsl(var(--foreground));
  font-size: calc(var(--md-font-size) * 1.2);
  font-weight: bold;
  text-align: center;
}

/* ==================== 二级标题 ==================== */
h2 {
  display: table;
  padding: 0 0.2em;
  margin: 4em auto 2em;
  color: #fff;
  background: var(--md-primary-color);
  font-size: calc(var(--md-font-size) * 1.2);
  font-weight: bold;
  text-align: center;
}

/* ==================== 三级标题 ==================== */
h3 {
  padding-left: 8px;
  border-left: 3px solid var(--md-primary-color);
  margin: 2em 8px 0.75em 0;
  color: hsl(var(--foreground));
  font-size: calc(var(--md-font-size) * 1.1);
  font-weight: bold;
  line-height: 1.2;
}

/* ==================== 四级标题 ==================== */
h4 {
  margin: 2em 8px 0.5em;
  color: var(--md-primary-color);
  font-size: calc(var(--md-font-size) * 1);
  font-weight: bold;
}

/* ==================== 五级标题 ==================== */
h5 {
  margin: 1.5em 8px 0.5em;
  color: var(--md-primary-color);
  font-size: calc(var(--md-font-size) * 1);
  font-weight: bold;
}

/* ==================== 六级标题 ==================== */
h6 {
  margin: 1.5em 8px 0.5em;
  font-size: calc(var(--md-font-size) * 1);
  color: var(--md-primary-color);
}

/* ==================== 段落 ==================== */
p {
  margin: 1.5em 8px;
  letter-spacing: 0.1em;
  color: hsl(var(--foreground));
}

/* ==================== 引用块 ==================== */
blockquote {
  font-style: normal;
  padding: 1em;
  border-left: 4px solid var(--md-primary-color);
  border-radius: 6px;
  color: hsl(var(--foreground));
  background: var(--blockquote-background);
  margin-bottom: 1em;
}

blockquote > p {
  display: block;
  font-size: 1em;
  letter-spacing: 0.1em;
  color: hsl(var(--foreground));
  margin: 0;
}

/* ==================== GFM 警告块 ==================== */
.alert-title-note,
.alert-title-tip,
.alert-title-info,
.alert-title-important,
.alert-title-warning,
.alert-title-caution,
.alert-title-abstract,
.alert-title-summary,
.alert-title-tldr,
.alert-title-todo,
.alert-title-success,
.alert-title-done,
.alert-title-question,
.alert-title-help,
.alert-title-faq,
.alert-title-failure,
.alert-title-fail,
.alert-title-missing,
.alert-title-danger,
.alert-title-error,
.alert-title-bug,
.alert-title-example,
.alert-title-quote,
.alert-title-cite,
.alert-title-theorem,
.alert-title-lemma,
.alert-title-corollary,
.alert-title-proposition,
.alert-title-definition,
.alert-title-axiom,
.alert-title-postulate,
.alert-title-assumption,
.alert-title-proof,
.alert-title-remark,
.alert-title-custom {
  display: flex;
  align-items: center;
  gap: 0.5em;
  margin-bottom: 0.5em;
}

.alert-title-note {
  color: #478be6;
}

.alert-title-tip {
  color: #57ab5a;
}

.alert-title-info {
  color: #93c5fd;
}

.alert-title-important {
  color: #986ee2;
}

.alert-title-warning {
  color: #c69026;
}

.alert-title-caution {
  color: #e5534b;
}

/* Obsidian-style callout colors */
.alert-title-abstract,
.alert-title-summary,
.alert-title-tldr {
  color: #00bfff;
}

.alert-title-todo {
  color: #478be6;
}

.alert-title-success,
.alert-title-done {
  color: #57ab5a;
}

.alert-title-question,
.alert-title-help,
.alert-title-faq {
  color: #c69026;
}

.alert-title-failure,
.alert-title-fail,
.alert-title-missing {
  color: #e5534b;
}

.alert-title-danger,
.alert-title-error {
  color: #e5534b;
}

.alert-title-bug {
  color: #e5534b;
}

.alert-title-example {
  color: #986ee2;
}

.alert-title-quote,
.alert-title-cite {
  color: #9ca3af;
}

/* GFM Alert SVG 图标颜色 */
.alert-icon-note {
  fill: #478be6;
}

.alert-icon-tip {
  fill: #57ab5a;
}

.alert-icon-info {
  fill: #93c5fd;
}

.alert-icon-important {
  fill: #986ee2;
}

.alert-icon-warning {
  fill: #c69026;
}

.alert-icon-caution {
  fill: #e5534b;
}

/* Obsidian-style callout icon colors */
.alert-icon-abstract,
.alert-icon-summary,
.alert-icon-tldr {
  fill: #00bfff;
}

.alert-icon-todo {
  fill: #478be6;
}

.alert-icon-success,
.alert-icon-done {
  fill: #57ab5a;
}

.alert-icon-question,
.alert-icon-help,
.alert-icon-faq {
  fill: #c69026;
}

.alert-icon-failure,
.alert-icon-fail,
.alert-icon-missing {
  fill: #e5534b;
}

.alert-icon-danger,
.alert-icon-error {
  fill: #e5534b;
}

.alert-icon-bug {
  fill: #e5534b;
}

.alert-icon-example {
  fill: #986ee2;
}

.alert-icon-quote,
.alert-icon-cite {
  fill: #9ca3af;
}

/* ==================== 学术环境（定理、引理、定义等） ==================== */
/* 标题颜色 */
.alert-title-theorem,
.alert-title-lemma,
.alert-title-corollary,
.alert-title-proposition {
  color: #986ee2;
}

.alert-title-definition {
  color: #57ab5a;
}

.alert-title-axiom,
.alert-title-postulate,
.alert-title-assumption {
  color: #478be6;
}

.alert-title-proof {
  color: #9ca3af;
}

.alert-title-remark {
  color: #c69026;
}

/* 图标颜色 */
.alert-icon-theorem,
.alert-icon-lemma,
.alert-icon-corollary,
.alert-icon-proposition {
  fill: #986ee2;
}

.alert-icon-definition {
  fill: #57ab5a;
}

.alert-icon-axiom,
.alert-icon-postulate,
.alert-icon-assumption {
  fill: #478be6;
}

.alert-icon-proof {
  fill: #9ca3af;
}

.alert-icon-remark {
  fill: #c69026;
}

/* 盒子描边：学术环境使用完整边框，更接近定理环境的视觉效果 */
.markdown-alert-theorem,
.markdown-alert-lemma,
.markdown-alert-corollary,
.markdown-alert-proposition {
  border: 1px solid rgba(152, 110, 226, 0.35);
  border-left: 4px solid #986ee2;
}

.markdown-alert-definition {
  border: 1px solid rgba(87, 171, 90, 0.35);
  border-left: 4px solid #57ab5a;
}

.markdown-alert-axiom,
.markdown-alert-postulate,
.markdown-alert-assumption {
  border: 1px solid rgba(71, 139, 230, 0.35);
  border-left: 4px solid #478be6;
}

.markdown-alert-proof {
  border: 1px solid rgba(156, 163, 175, 0.35);
  border-left: 4px solid #9ca3af;
}

.markdown-alert-remark {
  border: 1px solid rgba(198, 144, 38, 0.35);
  border-left: 4px solid #c69026;
}

/* 自定义/未知名称的兜底样式：无图标，使用主题主色 */
.alert-title-custom {
  color: var(--md-primary-color);
}

.markdown-alert-custom {
  border-left: 4px solid var(--md-primary-color);
}

/* 学术环境正文使用斜体，符合数学写作惯例 */
.markdown-alert-theorem > :not(.markdown-alert-title),
.markdown-alert-lemma > :not(.markdown-alert-title),
.markdown-alert-corollary > :not(.markdown-alert-title),
.markdown-alert-proposition > :not(.markdown-alert-title),
.markdown-alert-definition > :not(.markdown-alert-title),
.markdown-alert-axiom > :not(.markdown-alert-title),
.markdown-alert-postulate > :not(.markdown-alert-title),
.markdown-alert-assumption > :not(.markdown-alert-title) {
  font-style: italic;
}

/* ==================== 代码块 ==================== */
pre.code__pre,
.hljs.code__pre {
  font-size: 90%;
  overflow-x: auto;
  border-radius: 8px;
  padding: 0 !important;
  line-height: 1.5;
  margin: 10px 8px;
}

/* ==================== 图片 ==================== */
img {
  display: block;
  max-width: 100%;
  margin: 0.1em auto 0.5em;
  border-radius: 4px;
}

/* ==================== 列表 ==================== */
ol {
  padding-left: 1em;
  margin-left: 0;
  color: hsl(var(--foreground));
}

ul {
  list-style: circle;
  padding-left: 1em;
  margin-left: 0;
  color: hsl(var(--foreground));
}

li {
  display: block;
  margin: 0.2em 8px;
  color: hsl(var(--foreground));
}

/* ==================== 脚注 ==================== */
/* footnotes 在 buildFootnotes() 中渲染为 <p> 标签 */
p.footnotes {
  margin: 0.5em 8px;
  font-size: 80%;
  color: hsl(var(--foreground));
}

/* ==================== 图表 ==================== */
figure {
  margin: 1.5em 8px;
  color: hsl(var(--foreground));
}

figcaption,
.md-figcaption {
  text-align: center;
  color: color-mix(in srgb, hsl(var(--foreground)) 50%, transparent);
  font-size: 0.8em;
}

/* ==================== 分隔线 ==================== */
hr {
  border-style: solid;
  border-width: 2px 0 0;
  border-color: rgba(0, 0, 0, 0.1);
  -webkit-transform-origin: 0 0;
  -webkit-transform: scale(1, 0.5);
  transform-origin: 0 0;
  transform: scale(1, 0.5);
  height: 0.4em;
  margin: 1.5em 0;
}

/* ==================== 行内代码 ==================== */
.codespan {
  font-size: 90%;
  color: var(--md-primary-color);
  background: color-mix(in srgb, var(--md-primary-color) 8%, transparent);
  padding: 3px 5px;
  border-radius: 4px;
  border: 1px solid color-mix(in srgb, var(--md-primary-color) 20%, transparent);
}

/* 代码块内的 code 标签需要特殊处理（覆盖行内 code 样式） */
pre.code__pre > code,
.hljs.code__pre > code {
  display: -webkit-box;
  padding: 0.5em 1em 1em;
  overflow-x: auto;
  text-indent: 0;
  color: inherit;
  background: none;
  white-space: nowrap;
  margin: 0;
}

/* ==================== 强调 ==================== */
em {
  font-style: italic;
  font-size: inherit;
}

/* ==================== 链接 ==================== */
a {
  color: #576b95;
  text-decoration: none;
}

/* ==================== 粗体 ==================== */
strong {
  color: var(--md-primary-color);
  font-weight: bold;
  font-size: inherit;
}

/* ==================== 表格 ==================== */
table {
  color: hsl(var(--foreground));
}

thead {
  font-weight: bold;
  color: hsl(var(--foreground));
}

th {
  border: 1px solid color-mix(in srgb, hsl(var(--foreground)) 15%, transparent);
  padding: 0.25em 0.5em;
  color: hsl(var(--foreground));
  word-break: keep-all;
  background: color-mix(in srgb, hsl(var(--foreground)) 5%, transparent);
}

td {
  border: 1px solid color-mix(in srgb, hsl(var(--foreground)) 15%, transparent);
  padding: 0.25em 0.5em;
  color: hsl(var(--foreground));
  word-break: keep-all;
}

/* ==================== KaTeX 公式 ==================== */
.katex-inline {
  max-width: 100%;
  overflow-x: auto;
}

.katex-block {
  max-width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  padding: 0.5em 0;
  text-align: center;
}

/* ==================== 标记高亮 ==================== */
.markup-highlight {
  background-color: var(--md-primary-color);
  padding: 2px 4px;
  border-radius: 2px;
  color: #fff;
}

.markup-underline {
  text-decoration: underline;
  text-decoration-color: var(--md-primary-color);
}

.markup-wavyline {
  text-decoration: underline wavy;
  text-decoration-color: var(--md-primary-color);
  text-decoration-thickness: 2px;
}