Move docs/zh back to docs.

Move docs/overrides to overrides/.
Other fine tunes.

overrides/javascripts/katex.js

@@ -0,0 +1,10 @@
+document$.subscribe(({ body }) => {
+  renderMathInElement(body, {
+    delimiters: [
+      { left: "$$", right: "$$", display: true },
+      { left: "$", right: "$", display: false },
+      { left: "\\(", right: "\\)", display: false },
+      { left: "\\[", right: "\\]", display: true },
+    ],
+  });
+});

overrides/javascripts/mathjax.js

@@ -0,0 +1,16 @@
+window.MathJax = {
+  tex: {
+    inlineMath: [["\\(", "\\)"]],
+    displayMath: [["\\[", "\\]"]],
+    processEscapes: true,
+    processEnvironments: true,
+  },
+  options: {
+    ignoreHtmlClass: ".*|",
+    processHtmlClass: "arithmatex",
+  },
+};
+
+document$.subscribe(() => {
+  MathJax.typesetPromise();
+});

overrides/partials/content.html

@@ -0,0 +1,110 @@
+<!--
+  Copyright (c) 2016-2023 Martin Donath <martin.donath@squidfunk.com>
+
+  Permission is hereby granted, free of charge, to any person obtaining a copy
+  of this software and associated documentation files (the "Software"), to
+  deal in the Software without restriction, including without limitation the
+  rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+  sell copies of the Software, and to permit persons to whom the Software is
+  furnished to do so, subject to the following conditions:
+
+  The above copyright notice and this permission notice shall be included in
+  all copies or substantial portions of the Software.
+
+  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+  FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
+  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+  IN THE SOFTWARE.
+-->
+
+<!-- Tags -->
+{% if "material/tags" in config.plugins and tags %}
+  {% include "partials/tags.html" %}
+{% endif %}
+
+<!-- Actions -->
+{% include "partials/actions.html" %}
+
+<!--
+  Hack: check whether the content contains a h1 headline. If it doesn't, the
+  page title (or respectively site name) is used as the main headline.
+-->
+{% if "\x3ch1" not in page.content %}
+  <h1>{{ page.title | d(config.site_name, true)}}</h1>
+{% endif %}
+
+<!-- Page content -->
+{{ page.content }}
+
+<!-- Source file information -->
+{% if page.meta and (
+  page.meta.git_revision_date_localized or
+  page.meta.revision_date
+) %}
+  {% include "partials/source-file.html" %}
+{% endif %}
+
+<!-- Was this page helpful? -->
+{% include "partials/feedback.html" %}
+
+<!-- Previous and next pages link -->
+<nav
+class="md-footer__inner md-grid"
+aria-label="{{ lang.t('footer') }}"
+{{ hidden }}
+>
+
+<!-- Link to previous page -->
+{% if page.previous_page %}
+  {% set direction = lang.t("footer.previous") %}
+  <a
+    href="{{ page.previous_page.url | url }}"
+    class="md-footer__link md-footer__link--prev"
+    aria-label="{{ direction }}: {{ page.previous_page.title | e }}"
+    rel="prev"
+  >
+    <div class="md-footer__button md-icon">
+      {% set icon = config.theme.icon.previous or "material/arrow-left" %}
+      {% include ".icons/" ~ icon ~ ".svg" %}
+    </div>
+    <div class="md-footer__title">
+      <span class="md-footer__direction">
+        {{ direction }}
+      </span>
+      <div class="md-ellipsis">
+        {{ page.previous_page.title }}
+      </div>
+    </div>
+  </a>
+{% endif %}
+
+<!-- Link to next page -->
+{% if page.next_page %}
+  {% set direction = lang.t("footer.next") %}
+  <a
+    href="{{ page.next_page.url | url }}"
+    class="md-footer__link md-footer__link--next"
+    aria-label="{{ direction }}: {{ page.next_page.title | e }}"
+    rel="next"
+  >
+    <div class="md-footer__title">
+      <span class="md-footer__direction">
+        {{ direction }}
+      </span>
+      <div class="md-ellipsis">
+        {{ page.next_page.title }}
+      </div>
+    </div>
+    <div class="md-footer__button md-icon">
+      {% set icon = config.theme.icon.next or "material/arrow-right" %}
+      {% include ".icons/" ~ icon ~ ".svg" %}
+    </div>
+  </a>
+{% endif %}
+</nav>
+
+<!-- Comment system -->
+{% include "partials/comments.html" %}

overrides/stylesheets/extra.css

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+/* Color Settings */
+/* https://github.com/squidfunk/mkdocs-material/blob/6b5035f5580f97532d664e3d1babf5f320e88ee9/src/assets/stylesheets/main/_colors.scss */
+/* https://squidfunk.github.io/mkdocs-material/setup/changing-the-colors/#custom-colors */
+:root > * {
+  --md-primary-fg-color: #ffffff;
+  --md-primary-bg-color: #1d1d20;
+
+  --md-default-fg-color: #1d1d20;
+  --md-default-bg-color: #ffffff;
+
+  --md-code-fg-color: #1d1d20;
+
+  --md-accent-fg-color: #999;
+
+  --md-admonition-fg-color: #1d1d20;
+
+  --md-typeset-color: #1d1d20;
+  --md-typeset-a-color: #2aa996;
+}
+
+[data-md-color-scheme="slate"] {
+  --md-primary-fg-color: #22272e;
+  --md-primary-bg-color: #adbac7;
+
+  --md-default-fg-color: #adbac7;
+  --md-default-bg-color: #22272e;
+
+  --md-code-bg-color: #1D2126;
+  --md-code-fg-color: #adbac7;
+
+  --md-accent-fg-color: #aaa;
+
+  --md-admonition-fg-color: #adbac7;
+
+  --md-footer-fg-color: #adbac7;
+
+  --md-typeset-color: #adbac7;
+  --md-typeset-a-color: #21c8b8 !important;
+}
+
+/* https://github.com/squidfunk/mkdocs-material/issues/4832#issuecomment-1374891676 */
+.md-nav__link[for] {
+  color: var(--md-default-fg-color) !important;
+}
+
+/* Center Markdown Tables (requires md_in_html extension) */
+.center-table {
+  text-align: center;
+}
+
+/* Reset alignment for table cells */
+.md-typeset .center-table :is(td, th):not([align]) {
+  text-align: initial;
+}
+
+/* Font size */
+.md-typeset {
+  font-size: 0.75rem;
+  line-height: 1.5;
+}
+
+.md-typeset pre {
+  font-size: 0.95em;
+}
+
+/* Markdown Header */
+/* https://github.com/squidfunk/mkdocs-material/blob/dcab57dd1cced4b77875c1aa1b53467c62709d31/src/assets/stylesheets/main/_typeset.scss */
+.md-typeset h1 {
+  font-weight: 400;
+  color: var(--md-default-fg-color);
+}
+
+.md-typeset h2 {
+  font-weight: 400;
+}
+
+.md-typeset h3 {
+  font-weight: 500;
+}
+
+.md-typeset h5 {
+  text-transform: none;
+}
+
+/* Image align center */
+.center {
+  display: block;
+  margin: 0 auto;
+}
+
+/* font-family setting for Win10 */
+body {
+  --md-text-font-family: -apple-system, BlinkMacSystemFont,
+    var(--md-text-font, _), Helvetica, Arial, sans-serif;
+  --md-code-font-family: var(--md-code-font, _), SFMono-Regular, Consolas, Menlo,
+    -apple-system, BlinkMacSystemFont, var(--md-text-font, _), monospace;
+}
+
+/* max height of code block */
+/* https://github.com/squidfunk/mkdocs-material/issues/3444 */
+.md-typeset pre > code {
+  max-height: 25rem;
+}
+
+/* Make the picture not glare in dark theme */
+[data-md-color-scheme="slate"] .md-typeset img,
+[data-md-color-scheme="slate"] .md-typeset svg,
+[data-md-color-scheme="slate"] .md-typeset video {
+  filter: brightness(0.85) invert(0.05);
+}