siyuan/app/src/assets/scss/component/_typography.scss

@font-face {
  font-family: 'JetBrainsMono-Regular';
  /*! /* webpackIgnore: true */
  src: url(../../../appearance/fonts/JetBrainsMono-2.304/JetBrainsMono-Regular.woff2) format('woff2');
}

.b3-typography,
.protyle-wysiwyg {
  font-variant-ligatures: no-common-ligatures;
  display: flex;
  flex-direction: column;
  font-size: var(--b3-font-size-editor);
  font-family: var(--b3-font-family-protyle);

  img {
    max-width: 100%;
    margin: 0 auto;
  }

  // 需显示 p 的使用范围 https://github.com/siyuan-note/siyuan/issues/11670
  li > p,
  & > p,
  blockquote > p,
  [data-node-id] {
    line-height: 1.625;
    padding: 4px;
    margin: 2px 0;
    border-radius: var(--b3-border-radius);
  }

  ins > iframe {
    border: 0;
  }

  iframe {
    border: 1px solid var(--b3-theme-surface-lighter);
    width: 765px;
    box-sizing: border-box;
    height: 256px;
    max-width: 100%;
    vertical-align: bottom;
  }

  span[data-type~="sup"],
  span[data-type~="sub"] {
    position: relative;
    font-size: 75%;
    line-height: 0;
    vertical-align: baseline;
  }

  span[data-type~="sup"] {
    top: -.5em;
  }

  span[data-type~="sub"] {
    bottom: -.25em;
  }

  em,
  span[data-type~="em"] {
    font-style: italic;
    color: var(--b3-protyle-inline-em-color);
  }

  s,
  span[data-type~="s"] {
    color: var(--b3-protyle-inline-s-color);
    text-decoration: line-through;
  }

  strong,
  span[data-type~="strong"] {
    font-weight: bold;
    color: var(--b3-protyle-inline-strong-color);
  }

  span[data-type~="inline-math"] {
    user-select: text;
    display: inline;
    // https://github.com/siyuan-note/siyuan/issues/3081 test $\begin{bmatrix}   a & b \\c & d \\   e & f\end{bmatrix}$ test
    // https://ld246.com/article/1626937851892 <u>test $\mu_p$ test</u>
    // https://ld246.com/article/1636204769623  test $\rightarrow$ test
  }

  kbd,
  span[data-type~="kbd"] {
    padding: 2px 4px;
    font: 75% Consolas, "Liberation Mono", Menlo, Courier, monospace, var(--b3-font-family);
    line-height: 1;
    color: var(--b3-theme-on-surface);
    vertical-align: middle;
    background-color: var(--b3-theme-surface);
    border: solid 1px var(--b3-theme-surface-lighter);
    border-radius: var(--b3-border-radius);
    box-shadow: inset 0 -1px 0 var(--b3-theme-surface-lighter);
  }

  u {
    text-decoration: none;
    border-bottom: 1px solid;
  }

  u,
  span[data-type~="u"] {
    border-bottom: 1px solid;
    color: var(--b3-protyle-inline-u-color);
  }

  span[data-type~="inline-memo"] {
    background-color: var(--b3-card-info-background);
    border-bottom: 2px solid var(--b3-card-info-color);
  }

  mark,
  span[data-type~="mark"] {
    background-color: var(--b3-protyle-inline-mark-background);
    color: var(--b3-protyle-inline-mark-color);

    &.mark--hl {
      background-color: var(--b3-theme-primary-lighter);
      box-shadow: 0 0 0 .5px var(--b3-theme-on-background);
    }
  }

  blockquote {
    position: relative;
  }

  blockquote,
  .bq {
    &::before {
      content: '';
      background-color: var(--b3-theme-surface-lighter);
      width: .25em;
      border-radius: var(--b3-border-radius);
      position: absolute;
      left: 2px;
      top: 6px;
      bottom: 6px;
    }

    padding-left: calc(0.25em + 6px);
    color: var(--b3-theme-on-surface);
    background-color: var(--b3-bq-background);
    display: flex;
    flex-direction: column;
  }

  h1,
  h2,
  h3,
  h4,
  h5,
  h6 {
    padding: 4px;
    margin: 2px 0;
  }

  .h1,
  .h2,
  .h3,
  .h4,
  .h5,
  .h6,
  h1,
  h2,
  h3,
  h4,
  h5,
  h6 {
    font-weight: 600;
  }

  h1,
  .h1 {
    font-size: 1.75em;
  }

  h2,
  .h2 {
    font-size: 1.55em;
  }

  .h3,
  h3 {
    font-size: 1.38em;
  }

  .h4,
  h4 {
    font-size: 1.25em
  }

  .h5,
  h5 {
    font-size: 1.13em;
  }

  .h6,
  h6 {
    font-size: 1em;
  }

  audio {
    max-width: 100%;
    vertical-align: bottom;

    &:focus {
      outline: none;
    }
  }

  video {
    max-height: 90vh;
    max-width: 100%;
    vertical-align: bottom;

    &:focus {
      outline: none;
    }
  }

  table {
    border-collapse: collapse;
    empty-cells: show;
    margin: 0;
    overflow: auto;
    border-spacing: 0;
    width: max-content;

    &[style*="text-align: left"] {
      margin-right: auto;
    }
    &[style*="text-align: center"] {
      margin: auto;
    }
    &[style*="text-align: right"] {
      margin-left: auto;
    }

    tr:nth-child(even) td {
      background-color: var(--b3-table-even-background);
    }

    td,
    th {
      padding: 4px 8px;
      border: 1px solid var(--b3-theme-surface-lighter);
      box-sizing: border-box;
      max-width: 620px;
      word-wrap: break-word;

      &:empty::after {
        content: "";
        height: 16px;
        display: inline-block;
      }
    }

    thead th,
    thead td {
      font-weight: 600;
    }

    tbody th,
    tbody td {
      font-weight: normal;
    }
  }

  code:not(.hljs),
  span[data-type~="code"] {
    @extend .fn__code;
    tab-size: 4;
  }

  a[href^=pdf-outline] {
    white-space: pre !important;
    border-left: none !important;
    border-right: none !important;
    border-top: none !important;
    border-bottom: none !important;
    display: inline-block !important;
    position: absolute !important;
    width: 1px !important;
    left: 0 !important;
    outline: 0 !important;
    background: 0 0 !important;
    text-decoration: initial !important;
    text-shadow: initial !important;
    color: var(--b3-theme-background);
    font-size: 12px !important;
    overflow: hidden !important;
  }

  pre.code-block {
    border-radius: var(--b3-border-radius);
  }

  .code-block:not(pre) {
    margin: 2px 0;
    box-sizing: border-box;

    .protyle-action {
      left: 4px;
      top: 4px;
      display: flex;
      z-index: 1;
      position: absolute;
      right: 4px;

      .protyle-action__language {
        font-size: 85%;
        color: var(--b3-theme-on-surface);
        margin-top: -4px;
        align-self: center;
        margin-left: 1em;
        opacity: 0;
        transition: var(--b3-transition);
        line-height: calc(1.625 / 0.85);
      }

      .protyle-icon {
        opacity: 0;
        transition: var(--b3-transition);
      }
    }

    &:hover .protyle-icon,
    &:hover .protyle-action__language {
      opacity: .86;
    }
  }

  .hljs {
    font-size: 85%;
    overflow: auto;
    font-family: var(--b3-font-family-code);
    min-height: 22px !important;
    overflow-x: overlay;
    tab-size: 4;
    background-color: transparent;
  }

  div.hljs {
    padding: 2em 1em 1.6em;
    flex: 1;
    display: flex;
    position: relative;
  }

  [data-subtype="echarts"],
  [data-subtype="mindmap"] {
    z-index: 1;

    & > div:not(.protyle-icons):not(.protyle-attr) {
      overflow: hidden;
      height: 420px;
    }
  }

  .katex-display {
    user-select: none;
    overflow-x: auto;
    overflow-y: hidden;
    max-width: 100%;
    padding: 4px 0; // https://ld246.com/article/1626774181074/comment/1626789173915#comments
    // https://github.com/siyuan-note/siyuan/issues/3541
    & > .katex > .katex-html {
      display: flex;
      align-items: baseline; // https://ld246.com/article/1645933216334

      &::before {
        content: "";
        flex: 1;
      }

      & > .tag {
        position: initial;
        margin-right: 2px;
        margin-left: 8px;
      }
    }
  }

  .katex {
    // https://github.com/siyuan-note/siyuan/issues/10251
    // https://github.com/siyuan-note/siyuan/issues/10321
    // https://github.com/siyuan-note/siyuan/issues/10346
    line-height: normal; // https://ld246.com/article/1649890278771

    .mathnormal {
      font-family: var(--b3-font-family-math);
    }
  }

  [data-subtype="graphviz"] {
    text-align: center;

    [contenteditable="false"] svg {
      border-radius: var(--b3-border-radius);
      max-width: 100%; // https://github.com/siyuan-note/siyuan/issues/11181
      height: 100%; // https://github.com/siyuan-note/siyuan/issues/13852
    }
  }

  [data-subtype="flowchart"] {
    text-align: center;

    [contenteditable="false"] svg {
      background: var(--b3-theme-on-primary);
      border-radius: var(--b3-border-radius);
    }
  }

  [data-subtype="mermaid"],
  [data-subtype="plantuml"],
  [data-subtype="abc"] {
    text-align: center;
  }

  [data-subtype="flowchart"] > [spin="1"],
  [data-subtype="plantuml"] > [spin="1"],
  [data-subtype="mermaid"] > [spin="1"] {
    // 不能加到上一级，否则属性会跟随滚动
    overflow: auto;
    line-height: initial;
  }

  [data-subtype="plantuml"] img {
    border-radius: var(--b3-border-radius);
  }

  .abcjs-container svg,
  .abcjs-container path {
    fill: currentColor;
    color: var(--b3-theme-on-background);
  }

  .img {
    // inline-block 会导致 https://ld246.com/article/1677809509055
    // initial 会导致 https://ld246.com/article/1678257197581?r=88250
    display: inline-block;
    text-align: center;
    vertical-align: top; // https://ld246.com/article/1647522074722
    margin: 0 auto;
    max-width: 100%;
    user-select: none;
    word-break: keep-all;
    white-space: nowrap;

    & > span:nth-child(1),
    & > span:nth-child(3) {
      width: 4px;
      display: inline-block;
    }

    & > span:nth-child(2) {
      max-width: calc(100% - 8px);
      position: relative;
      display: inline-block;
      min-width: 22px;

      &[style^=width] img {
        width: 100%;
      }
    }

    .protyle-action__title {
      display: flex;
      font-size: 85%;
      color: var(--b3-theme-on-surface);
      word-break: break-word;
      white-space: break-spaces;
      line-height: normal;
      padding: 4px 0;

      & > span {
        flex-grow: 1;
        width: 0;
      }
    }
  }

  .iframe {
    text-align: center;
  }
}

.b3-typography {
  font-family: var(--b3-font-family);
  word-wrap: break-word;
  overflow: auto;
  line-height: 1.625;
  font-size: 16px;
  word-break: break-word;

  ul {
    list-style-type: disc;
  }

  ul,
  ol {
    padding-left: 2em;
    margin: 4px 0;
  }

  hr {
    border: 0;
    border-bottom: 1px solid var(--b3-theme-background-light);
    margin: 21px 0;
  }

  table {
    margin: 1em 0;
  }

  div[data-subtype="math"] {
    position: relative;
    padding-top: 4px;
  }

  .protyle-icons {
    display: none;
  }
}

.protyle {

  &-icons {
    z-index: 1;
    transition: var(--b3-transition);
    opacity: 0;
    position: absolute;
    right: 4px;
    top: 4px;
    display: flex;

    &--show {
      opacity: .86;
    }
  }

  &-icon {
    font-size: 85%;
    line-height: 14px;
    cursor: pointer;
    padding: 5px;
    transition: var(--b3-transition);
    background-color: var(--b3-theme-on-surface);
    height: 24px;
    color: var(--b3-theme-surface);
    box-sizing: border-box;

    &--only {
      border-radius: var(--b3-border-radius);
    }

    &--first {
      border-bottom-left-radius: var(--b3-border-radius);
      border-top-left-radius: var(--b3-border-radius);
    }

    &--last {
      border-bottom-right-radius: var(--b3-border-radius);
      border-top-right-radius: var(--b3-border-radius);
    }

    &:hover {
      color: var(--b3-theme-background);
      background-color: var(--b3-theme-on-background);
    }

    &--text {
      cursor: text;
      border-radius: var(--b3-border-radius);

      &:hover {
        color: var(--b3-theme-surface);
        background-color: var(--b3-theme-on-surface);
      }
    }

    & > svg {
      height: 14px;
      float: left;
      width: 14px;
      fill: currentColor;
    }
  }

  &-linenumber__rows {
    pointer-events: none;
    user-select: none;
    counter-reset: linenumber;
    font-size: 85%;
    font-family: var(--b3-font-family-code);
    text-align: right;
    position: absolute;

    & > span {
      pointer-events: none;
      display: block;

      &::before {
        counter-increment: linenumber;
        content: counter(linenumber);
        color: var(--b3-theme-on-surface);
        display: block;
        text-align: right;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        direction: rtl;
      }
    }
  }

  &-speech {
    position: absolute;
    display: none;
    background-color: var(--b3-theme-surface);
    border: 1px solid var(--b3-theme-surface-lighter);
    border-radius: var(--b3-border-radius);
    padding: 3px;
    cursor: pointer;
    color: var(--b3-theme-on-surface);

    &:hover,
    &--current {
      color: var(--b3-theme-primary);
    }

    svg {
      height: 14px;
      width: 14px;
      fill: currentColor;
      display: block;
      stroke-width: 0;
      stroke: currentColor;
    }
  }

  &-task {
    list-style: none !important;
    word-break: break-word;
    position: relative;

    &--done > div[data-node-id].p {
      color: var(--b3-theme-on-surface-light);
      text-decoration: line-through;
    }

    input {
      left: -1.5em;
      position: absolute;
      top: 0;
      height: 32px;
      margin: 0;
      width: 1em;
    }
  }

  &-wysiwyg .table > div:first-child {
    overflow: auto;
  }
}

.mermaidTooltip {
  position: fixed;
  border-radius: var(--b3-border-radius);
  box-shadow: var(--b3-dialog-shadow);
  border: 1px solid var(--b3-theme-surface-lighter);
  background-color: var(--b3-theme-surface);
  z-index: 304;
  padding: 4px;
}

.emoji {
  width: 1.25em;
  cursor: auto;
  max-width: none;
  vertical-align: sub; // text-top windows 不兼容
}