@charset "UTF-8";
/*
 * Project: Heti homepage
 * URL: https://github.com/sivan/heti
 * Author: Sivan [sun.sivan@gmail.com]
 */
/* normalize.css v8.0.1 | MIT License | github.com/necolas/normalize.css */
/* Document
   ========================================================================== */
/**
 * 1. Correct the line height in all browsers.
 * 2. Prevent adjustments of font size after orientation changes in iOS.
 */
html {
  line-height: 1.15;
  /* 1 */
  -webkit-text-size-adjust: 100%;
  /* 2 */
}

/* Sections
   ========================================================================== */
/**
 * Remove the margin in all browsers.
 */
body {
  margin: 0;
}

/**
 * Render the `main` element consistently in IE.
 */
main {
  display: block;
}

/**
 * Correct the font size and margin on `h1` elements within `section` and
 * `article` contexts in Chrome, Firefox, and Safari.
 */
h1 {
  font-size: 2em;
  margin: 0.67em 0;
}

/* Grouping content
   ========================================================================== */
/**
 * 1. Add the correct box sizing in Firefox.
 * 2. Show the overflow in Edge and IE.
 */
hr {
  box-sizing: content-box;
  /* 1 */
  height: 0;
  /* 1 */
  overflow: visible;
  /* 2 */
}

/**
 * 1. Correct the inheritance and scaling of font size in all browsers.
 * 2. Correct the odd `em` font sizing in all browsers.
 */
pre {
  font-family: monospace, monospace;
  /* 1 */
  font-size: 1em;
  /* 2 */
}

/* Text-level semantics
   ========================================================================== */
/**
 * Remove the gray background on active links in IE 10.
 */
a {
  background-color: transparent;
}

/**
 * 1. Remove the bottom border in Chrome 57-
 * 2. Add the correct text decoration in Chrome, Edge, IE, Opera, and Safari.
 */
abbr[title] {
  border-bottom: none;
  /* 1 */
  text-decoration: underline;
  /* 2 */
  text-decoration: underline dotted;
  /* 2 */
}

/**
 * Add the correct font weight in Chrome, Edge, and Safari.
 */
b,
strong {
  font-weight: bolder;
}

/**
 * 1. Correct the inheritance and scaling of font size in all browsers.
 * 2. Correct the odd `em` font sizing in all browsers.
 */
code,
kbd,
samp {
  font-family: monospace, monospace;
  /* 1 */
  font-size: 1em;
  /* 2 */
}

/**
 * Add the correct font size in all browsers.
 */
small {
  font-size: 80%;
}

/**
 * Prevent `sub` and `sup` elements from affecting the line height in
 * all browsers.
 */
sub,
sup {
  font-size: 75%;
  line-height: 0;
  position: relative;
  vertical-align: baseline;
}

sub {
  bottom: -0.25em;
}

sup {
  top: -0.5em;
}

/* Embedded content
   ========================================================================== */
/**
 * Remove the border on images inside links in IE 10.
 */
img {
  border-style: none;
}

/* Forms
   ========================================================================== */
/**
 * 1. Change the font styles in all browsers.
 * 2. Remove the margin in Firefox and Safari.
 */
button,
input,
optgroup,
select,
textarea {
  font-family: inherit;
  /* 1 */
  font-size: 100%;
  /* 1 */
  line-height: 1.15;
  /* 1 */
  margin: 0;
  /* 2 */
}

/**
 * Show the overflow in IE.
 * 1. Show the overflow in Edge.
 */
button,
input {
  /* 1 */
  overflow: visible;
}

/**
 * Remove the inheritance of text transform in Edge, Firefox, and IE.
 * 1. Remove the inheritance of text transform in Firefox.
 */
button,
select {
  /* 1 */
  text-transform: none;
}

/**
 * Correct the inability to style clickable types in iOS and Safari.
 */
button,
[type="button"],
[type="reset"],
[type="submit"] {
  -webkit-appearance: button;
}

/**
 * Remove the inner border and padding in Firefox.
 */
button::-moz-focus-inner,
[type="button"]::-moz-focus-inner,
[type="reset"]::-moz-focus-inner,
[type="submit"]::-moz-focus-inner {
  border-style: none;
  padding: 0;
}

/**
 * Restore the focus styles unset by the previous rule.
 */
button:-moz-focusring,
[type="button"]:-moz-focusring,
[type="reset"]:-moz-focusring,
[type="submit"]:-moz-focusring {
  outline: 1px dotted ButtonText;
}

/**
 * Correct the padding in Firefox.
 */
fieldset {
  padding: 0.35em 0.75em 0.625em;
}

/**
 * 1. Correct the text wrapping in Edge and IE.
 * 2. Correct the color inheritance from `fieldset` elements in IE.
 * 3. Remove the padding so developers are not caught out when they zero out
 *    `fieldset` elements in all browsers.
 */
legend {
  box-sizing: border-box;
  /* 1 */
  color: inherit;
  /* 2 */
  display: table;
  /* 1 */
  max-width: 100%;
  /* 1 */
  padding: 0;
  /* 3 */
  white-space: normal;
  /* 1 */
}

/**
 * Add the correct vertical alignment in Chrome, Firefox, and Opera.
 */
progress {
  vertical-align: baseline;
}

/**
 * Remove the default vertical scrollbar in IE 10+.
 */
textarea {
  overflow: auto;
}

/**
 * 1. Add the correct box sizing in IE 10.
 * 2. Remove the padding in IE 10.
 */
[type="checkbox"],
[type="radio"] {
  box-sizing: border-box;
  /* 1 */
  padding: 0;
  /* 2 */
}

/**
 * Correct the cursor style of increment and decrement buttons in Chrome.
 */
[type="number"]::-webkit-inner-spin-button,
[type="number"]::-webkit-outer-spin-button {
  height: auto;
}

/**
 * 1. Correct the odd appearance in Chrome and Safari.
 * 2. Correct the outline style in Safari.
 */
[type="search"] {
  -webkit-appearance: textfield;
  /* 1 */
  outline-offset: -2px;
  /* 2 */
}

/**
 * Remove the inner padding in Chrome and Safari on macOS.
 */
[type="search"]::-webkit-search-decoration {
  -webkit-appearance: none;
}

/**
 * 1. Correct the inability to style clickable types in iOS and Safari.
 * 2. Change font properties to `inherit` in Safari.
 */
::-webkit-file-upload-button {
  -webkit-appearance: button;
  /* 1 */
  font: inherit;
  /* 2 */
}

/* Interactive
   ========================================================================== */
/*
 * Add the correct display in Edge, IE 10+, and Firefox.
 */
details {
  display: block;
}

/*
 * Add the correct display in all browsers.
 */
summary {
  display: list-item;
}

/* Misc
   ========================================================================== */
/**
 * Add the correct display in IE 10+.
 */
template {
  display: none;
}

/**
 * Add the correct display in IE 10.
 */
[hidden] {
  display: none;
}

/* 简单模拟 css reset */
* {
  margin: 0;
  padding: 0;
}

ul,
ol {
  list-style: none;
}

/* 模拟不知道哪里流传出来的垃圾代码 */
ul,
li {
  list-style: none;
}

.container[data-bg-grid="grid-12"] {
  background-size: 100% 12px;
  background-image: linear-gradient(transparent 11px, #ededed 1px), linear-gradient(to left, transparent 12px, #ededed, transparent 13px), linear-gradient(to right, transparent 12px, #ededed, transparent 13px);
}

.container[data-bg-grid="grid-12"] .heti--vertical {
  outline: 1px solid #ededed;
  background-size: 12px 100%;
  background-image: linear-gradient(to left, transparent 11px, #ededed 1px);
}

.container[data-bg-grid="grid-24"] {
  background-size: 100% 24px;
  background-image: linear-gradient(transparent 23px, #ededed 1px), linear-gradient(to left, transparent 12px, #ededed, transparent 13px), linear-gradient(to right, transparent 12px, #ededed, transparent 13px);
}

.container[data-bg-grid="grid-24"] .heti--vertical {
  outline: 1px solid #ededed;
  background-size: 24px 100%;
  background-image: linear-gradient(to left, transparent 23px, #ededed 1px);
}

[data-darkmode="dark"] .container[data-bg-grid="grid-12"] {
  background-image: linear-gradient(transparent 11px, #333333 1px), linear-gradient(to left, transparent 12px, #333333, transparent 13px), linear-gradient(to right, transparent 12px, #333333, transparent 13px);
}

[data-darkmode="dark"] .container[data-bg-grid="grid-12"] .heti--vertical {
  background-size: 12px 100%;
  background-image: linear-gradient(to left, transparent 11px, #333333 1px);
}

[data-darkmode="dark"] .container[data-bg-grid="grid-24"] {
  background-image: linear-gradient(transparent 23px, #333333 1px), linear-gradient(to left, transparent 12px, #333333, transparent 13px), linear-gradient(to right, transparent 12px, #333333, transparent 13px);
}

[data-darkmode="dark"] .container[data-bg-grid="grid-24"] .heti--vertical {
  background-size: 24px 100%;
  background-image: linear-gradient(to left, transparent 23px, #333333 1px);
}

@media (prefers-color-scheme: dark) {
  [data-darkmode="auto"] .container[data-bg-grid="grid-12"] {
    background-image: linear-gradient(transparent 11px, #333333 1px), linear-gradient(to left, transparent 12px, #333333, transparent 13px), linear-gradient(to right, transparent 12px, #333333, transparent 13px);
  }
  [data-darkmode="auto"] .container[data-bg-grid="grid-12"] .heti--vertical {
    background-size: 12px 100%;
    background-image: linear-gradient(to left, transparent 11px, #333333 1px);
  }
  [data-darkmode="auto"] .container[data-bg-grid="grid-24"] {
    background-image: linear-gradient(transparent 23px, #333333 1px), linear-gradient(to left, transparent 12px, #333333, transparent 13px), linear-gradient(to right, transparent 12px, #333333, transparent 13px);
  }
  [data-darkmode="auto"] .container[data-bg-grid="grid-24"] .heti--vertical {
    background-size: 24px 100%;
    background-image: linear-gradient(to left, transparent 23px, #333333 1px);
  }
}

@media screen and (min-width: 640px) {
  .container[data-bg-grid="grid-12"] {
    background-image: linear-gradient(transparent 11px, #ededed 1px), linear-gradient(to left, transparent 48px, #ededed, transparent 49px), linear-gradient(to right, transparent 48px, rgba(255, 0, 0, 0.4), transparent 49px);
  }
  .container[data-bg-grid="grid-24"] {
    background-image: linear-gradient(transparent 23px, #ededed 1px), linear-gradient(to left, transparent 48px, #ededed, transparent 49px), linear-gradient(to right, transparent 48px, rgba(255, 0, 0, 0.4), transparent 49px);
  }
  [data-darkmode="dark"] .container[data-bg-grid="grid-12"] {
    background-image: linear-gradient(transparent 11px, #333333 1px), linear-gradient(to left, transparent 48px, #333333, transparent 49px), linear-gradient(to right, transparent 48px, rgba(255, 77, 77, 0.4), transparent 49px);
  }
  [data-darkmode="dark"] .container[data-bg-grid="grid-24"] {
    background-image: linear-gradient(transparent 23px, #333333 1px), linear-gradient(to left, transparent 48px, #333333, transparent 49px), linear-gradient(to right, transparent 48px, rgba(255, 77, 77, 0.4), transparent 49px);
  }
}

@media screen and (min-width: 640px) and (prefers-color-scheme: dark) {
  [data-darkmode="auto"] .container[data-bg-grid="grid-12"] {
    background-image: linear-gradient(transparent 11px, #333333 1px), linear-gradient(to left, transparent 48px, #333333, transparent 49px), linear-gradient(to right, transparent 48px, rgba(255, 77, 77, 0.4), transparent 49px);
  }
  [data-darkmode="auto"] .container[data-bg-grid="grid-24"] {
    background-image: linear-gradient(transparent 23px, #333333 1px), linear-gradient(to left, transparent 48px, #333333, transparent 49px), linear-gradient(to right, transparent 48px, rgba(255, 77, 77, 0.4), transparent 49px);
  }
}

.panel-list {
  display: inline-flex;
  margin: 0;
  padding: 0;
  list-style-type: none;
  --bg-color: hsl(240, 100%, 100%);
  --bg-tap-color: hsl(300, 3%, 94%);
  --border-color: hsla(0, 0%, 76%, 0.88);
  --border-inline-start-color: hsl(0, 0%, 76%);
  --border-inline-end-color: hsl(0, 0%, 76%);
  --border-block-start-color: hsl(0, 0%, 79%);
  --border-block-end-color: hsl(0, 0%, 65%);
  --text-color: hsl(60, 1%, 16%);
  --box-shadow-color: hsla(0, 0%, 86%, 0.54);
  --bg-highlight-color-start: hsl(216, 87%, 70%);
  --bg-highlight-color-end: hsl(215, 93%, 52%);
  --bg-highlight-tap-color-start: hsl(216, 92%, 65%);
  --bg-highlight-tap-color-end: hsl(215, 95%, 44%);
  --border-highlight-color: hsla(216, 90%, 57%, 0.88);
  --border-highlight-tap-color: hsla(216, 85%, 52%, 0.88);
  --border-inline-start-highlight-color: hsl(216, 90%, 57%);
  --border-inline-end-highlight-color: hsl(216, 90%, 57%);
  --border-inline-start-highlight-tap-color: hsl(216, 85%, 52%);
  --border-inline-end-highlight-tap-color: hsl(216, 85%, 52%);
  --border-block-start-highlight-color: hsl(216, 87%, 63%);
  --border-block-end-highlight-color: hsl(215, 99%, 49%);
  --border-block-start-highlight-tap-color: hsl(216, 93%, 57%);
  --border-block-end-highlight-tap-color: hsl(216, 100%, 42%);
  --text-highlight-color: hsl(0, 0%, 100%);
}

.panel-list--gray {
  --bg-color: hsl(180, 100%, 100%);
  --bg-tap-color: hsl(0, 0%, 94%);
  --border-color: hsla(0, 0%, 72%, 0.88);
  --border-inline-start-color: hsl(0, 0%, 76%);
  --border-inline-end-color: hsl(0, 0%, 76%);
  --border-block-start-color: hsl(0, 0%, 79%);
  --border-block-end-color: hsl(0, 0%, 65%);
  --text-color: hsl(0, 0%, 16%);
  --box-shadow-color: hsla(0, 0%, 86%, 0.54);
  --bg-highlight-color-start: hsl(225, 3%, 70%);
  --bg-highlight-color-end: hsl(228, 2%, 58%);
  --bg-highlight-tap-color-start: hsl(228, 2%, 58%);
  --bg-highlight-tap-color-end: hsl(240, 3%, 35%);
  --border-highlight-color: hsla(225, 2%, 64%, 0.88);
  --border-highlight-tap-color: hsla(228, 2%, 47%, 0.88);
  --border-inline-start-highlight-color: hsl(240, 3%, 59%);
  --border-inline-end-highlight-color: hsl(228, 2%, 54%);
  --border-inline-start-highlight-tap-color: hsl(240, 3%, 39%);
  --border-inline-end-highlight-tap-color: hsl(228, 3%, 39%);
  --border-block-start-highlight-color: hsl(240, 3%, 66%);
  --border-block-end-highlight-color: hsl(228, 2%, 50%);
  --border-block-start-highlight-tap-color: hsl(228, 2%, 51%);
  --border-block-end-highlight-tap-color: hsl(228, 4%, 26%);
  --text-highlight-color: hsl(0, 0%, 92%);
}

[data-darkmode="dark"] .panel-list {
  --bg-color: hsl(225, 2%, 40%);
  --bg-tap-color: hsl(210, 2%, 49%);
  --border-color: hsla(210, 2%, 33%, 0.88);
  --border-inline-start-color: hsl(210, 2%, 33%);
  --border-inline-end-color: hsl(210, 2%, 33%);
  --border-block-start-color: hsl(225, 2%, 45%);
  --border-block-end-color: hsl(210, 2%, 40%);
  --text-color: hsl(0, 0%, 91%);
  --box-shadow-color: hsla(225, 4%, 21%, 0.54);
  --bg-highlight-color-start: hsl(216, 77%, 49%);
  --bg-highlight-color-end: hsl(216, 76%, 45%);
  --bg-highlight-tap-color-start: hsl(214, 83%, 55%);
  --bg-highlight-tap-color-end: hsl(215, 74%, 51%);
  --border-highlight-color: hsla(215, 77%, 47%, 0.88);
  --border-highlight-tap-color: hsla(215, 79%, 54%, 0.88);
  --border-inline-start-highlight-color: hsl(215, 77%, 47%);
  --border-inline-end-highlight-color: hsl(215, 77%, 47%);
  --border-inline-start-highlight-tap-color: hsl(215, 79%, 54%);
  --border-inline-end-highlight-tap-color: hsl(215, 79%, 54%);
  --border-block-start-highlight-color: hsl(216, 76%, 55%);
  --border-block-end-highlight-color: hsl(216, 76%, 44%);
  --border-block-start-highlight-tap-color: hsl(215, 84%, 60%);
  --border-block-end-highlight-tap-color: hsl(215, 74%, 51%);
  --text-highlight-color: hsl(0, 0%, 100%);
}

[data-darkmode="dark"] .panel-list--gray {
  --bg-color: hsl(0, 0%, 40%);
  --bg-tap-color: hsl(0, 0%, 49%);
  --border-color: hsla(120, 1%, 34%, 0.88);
  --border-inline-start-color: hsl(0, 0%, 40%);
  --border-inline-end-color: hsl(360, 0%, 40%);
  --border-block-start-color: hsl(0, 0%, 46%);
  --border-block-end-color: hsl(120, 0%, 40%);
  --text-color: hsl(0, 0%, 91%);
  --box-shadow-color: hsla(0, 0%, 17%, 0.54);
  --bg-highlight-color-start: hsl(0, 0%, 60%);
  --bg-highlight-color-end: hsl(0, 0%, 60%);
  --bg-highlight-tap-color-start: hsl(0, 0%, 69%);
  --bg-highlight-tap-color-end: hsl(0, 0%, 69%);
  --border-highlight-color: hsla(0, 0%, 60%, 0.88);
  --border-highlight-tap-color: hsla(0, 0%, 69%, 0.88);
  --border-inline-start-highlight-color: hsl(0, 0%, 60%);
  --border-inline-end-highlight-color: hsl(0, 0%, 60%);
  --border-inline-start-highlight-tap-color: hsl(0, 0%, 69%);
  --border-inline-end-highlight-tap-color: hsl(0, 0%, 69%);
  --border-block-start-highlight-color: hsl(0, 0%, 64%);
  --border-block-end-highlight-color: hsl(0, 0%, 60%);
  --border-block-start-highlight-tap-color: hsl(0, 0%, 73%);
  --border-block-end-highlight-tap-color: hsl(0, 0%, 69%);
  --text-highlight-color: hsl(0, 0%, 15%);
}

@media (prefers-color-scheme: dark) {
  [data-darkmode="auto"] .panel-list {
    --bg-color: hsl(225, 2%, 40%);
    --bg-tap-color: hsl(210, 2%, 49%);
    --border-color: hsla(210, 2%, 33%, 0.88);
    --border-inline-start-color: hsl(210, 2%, 33%);
    --border-inline-end-color: hsl(210, 2%, 33%);
    --border-block-start-color: hsl(225, 2%, 45%);
    --border-block-end-color: hsl(210, 2%, 40%);
    --text-color: hsl(0, 0%, 91%);
    --box-shadow-color: hsla(225, 4%, 21%, 0.54);
    --bg-highlight-color-start: hsl(216, 77%, 49%);
    --bg-highlight-color-end: hsl(216, 76%, 45%);
    --bg-highlight-tap-color-start: hsl(214, 83%, 55%);
    --bg-highlight-tap-color-end: hsl(215, 74%, 51%);
    --border-highlight-color: hsla(215, 77%, 47%, 0.88);
    --border-highlight-tap-color: hsla(215, 79%, 54%, 0.88);
    --border-inline-start-highlight-color: hsl(215, 77%, 47%);
    --border-inline-end-highlight-color: hsl(215, 77%, 47%);
    --border-inline-start-highlight-tap-color: hsl(215, 79%, 54%);
    --border-inline-end-highlight-tap-color: hsl(215, 79%, 54%);
    --border-block-start-highlight-color: hsl(216, 76%, 55%);
    --border-block-end-highlight-color: hsl(216, 76%, 44%);
    --border-block-start-highlight-tap-color: hsl(215, 84%, 60%);
    --border-block-end-highlight-tap-color: hsl(215, 74%, 51%);
    --text-highlight-color: hsl(0, 0%, 100%);
  }
  [data-darkmode="auto"] .panel-list--gray {
    --bg-color: hsl(0, 0%, 40%);
    --bg-tap-color: hsl(0, 0%, 49%);
    --border-color: hsla(120, 1%, 34%, 0.88);
    --border-inline-start-color: hsl(0, 0%, 40%);
    --border-inline-end-color: hsl(360, 0%, 40%);
    --border-block-start-color: hsl(0, 0%, 46%);
    --border-block-end-color: hsl(120, 0%, 40%);
    --text-color: hsl(0, 0%, 91%);
    --box-shadow-color: hsla(0, 0%, 17%, 0.54);
    --bg-highlight-color-start: hsl(0, 0%, 60%);
    --bg-highlight-color-end: hsl(0, 0%, 60%);
    --bg-highlight-tap-color-start: hsl(0, 0%, 69%);
    --bg-highlight-tap-color-end: hsl(0, 0%, 69%);
    --border-highlight-color: hsla(0, 0%, 60%, 0.88);
    --border-highlight-tap-color: hsla(0, 0%, 69%, 0.88);
    --border-inline-start-highlight-color: hsl(0, 0%, 60%);
    --border-inline-end-highlight-color: hsl(0, 0%, 60%);
    --border-inline-start-highlight-tap-color: hsl(0, 0%, 69%);
    --border-inline-end-highlight-tap-color: hsl(0, 0%, 69%);
    --border-block-start-highlight-color: hsl(0, 0%, 64%);
    --border-block-end-highlight-color: hsl(0, 0%, 60%);
    --border-block-start-highlight-tap-color: hsl(0, 0%, 73%);
    --border-block-end-highlight-tap-color: hsl(0, 0%, 69%);
    --text-highlight-color: hsl(0, 0%, 15%);
  }
}

.panel-list + .panel-list {
  margin-inline-start: 12px;
}

.panel-list label {
  position: relative;
  display: block;
  box-sizing: border-box;
  height: 20px;
  padding: 0;
  padding-inline-start: 12px;
  padding-inline-end: 12px;
  border: 1px solid;
  font-size: 12px;
  line-height: 18px;
  text-align: center;
  user-select: none;
  background-color: var(--bg-color);
  border-color: var(--border-color);
  border-block-start-color: var(--border-block-start-color);
  border-block-end-color: var(--border-block-end-color);
  color: var(--text-color);
  box-shadow: 0 1px 0 var(--box-shadow-color);
}

.panel-list label:active {
  background-color: var(--bg-tap-color);
}

.panel-list li {
  margin-inline-end: -1px;
}

.panel-list li:first-child label {
  border-top-left-radius: 4px;
  border-bottom-left-radius: 4px;
  border-inline-start-color: var(--border-inline-start-color);
}

.panel-list li:last-child label {
  border-top-right-radius: 4px;
  border-bottom-right-radius: 4px;
  border-inline-end-color: var(--border-inline-end-color);
}

.panel-list input {
  display: none;
}

.panel-list input:checked + label {
  z-index: 1;
  background-image: linear-gradient(to bottom, var(--bg-highlight-color-start), var(--bg-highlight-color-end));
  border-color: var(--border-highlight-color);
  border-block-start-color: var(--border-block-start-highlight-color);
  border-block-end-color: var(--border-block-end-highlight-color);
  color: var(--text-highlight-color);
}

.panel-list input:checked + label:active {
  background-image: linear-gradient(to bottom, var(--bg-highlight-tap-color-start), var(--bg-highlight-tap-color-end));
  border-color: var(--border-highlight-tap-color);
  border-block-start-color: var(--border-block-start-highlight-tap-color);
  border-block-end-color: var(--border-block-end-highlight-tap-color);
}

.panel-list--icon label {
  width: 30px;
  padding-inline-start: 8px;
  padding-inline-end: 8px;
}

.anchor {
  margin-inline-start: 0.25em;
}

@media screen and (min-width: 640px) {
  .article .anchor {
    position: absolute;
    left: -1em;
    width: 1em;
    margin-inline-start: 0;
    font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
    font-weight: 400;
    line-height: inherit;
    text-align: center;
    opacity: 0;
    transition: opacity 0.2s linear;
  }
  .article .anchor:hover {
    text-decoration: none;
    border: 0;
  }
  .article h1,
  .article h2,
  .article h3,
  .article h4,
  .article h5,
  .article h6 {
    position: relative;
  }
  .article h1:hover .anchor,
  .article h2:hover .anchor,
  .article h3:hover .anchor,
  .article h4:hover .anchor,
  .article h5:hover .anchor,
  .article h6:hover .anchor {
    opacity: 1;
  }
}

.card {
  position: relative;
  left: -12px;
  width: 100%;
  margin-block-start: 24px;
  margin-block-end: 48px;
  padding-block-start: 12px;
  padding-block-end: 12px;
  padding-inline-start: 12px;
  padding-inline-end: 12px;
  border-radius: 2px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.16);
  background-color: white;
}

.article .card {
  text-align: left;
}

.card > figcaption {
  display: inline-block;
  margin-block-start: 16px;
  padding-block-start: 4px;
  padding-block-end: 3px;
  padding-inline-start: 0;
  padding-inline-end: 72px;
  line-height: 24px;
  border-block-start: 1px solid #ededed;
}

.card__vertical-container {
  box-sizing: border-box;
  width: 100%;
  height: 30em;
  border: 1px solid #ededed;
  overflow: auto;
  writing-mode: vertical-rl;
}

@media screen and (min-width: 640px) {
  .card {
    box-sizing: border-box;
    left: -20%;
    width: 140%;
    padding-block-start: 24px;
    padding-block-end: 24px;
    padding-inline-start: 32px;
    padding-inline-end: 32px;
  }
}

@media (prefers-color-scheme: dark) {
  .card {
    background-color: #292929;
  }
  .card > figcaption {
    border-block-start: 1px solid #333333;
  }
  .card__vertical-container {
    border-color: #333333;
  }
}

/** 基础样式 **/
body {
  font-family: -apple-system, system-ui, "Helvetica Neue", Helvetica, Arial, "Heti Hei", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
  background-color: white;
}

a {
  color: #4387f4;
  text-decoration: none;
}

.container {
  box-sizing: border-box;
  padding-block-start: 12px;
  padding-block-end: 72px;
  padding-inline-start: 12px;
  padding-inline-end: 12px;
}

/** 首页样式 **/
.article {
  margin-inline-start: auto;
  margin-inline-end: auto;
}

.article__nav ol {
  margin-block-start: 24px;
  margin-block-end: 24px;
}

/** 控制栏样式 **/
.panel {
  position: fixed;
  z-index: 2;
  right: 14px;
  top: 14px;
  display: flex;
  text-align: right;
}

/** 演示区块 **/
.demo {
  margin-block-start: 24px;
  margin-block-end: 24px;
}

.section {
  width: 100%;
  max-height: 85vh;
  margin-block-start: 12px;
  margin-block-end: 12px;
  overflow: auto;
}

@media screen and (min-width: 640px) {
  body {
    min-width: 640px;
    background-color: #ededed;
  }
  .container {
    box-sizing: border-box;
    width: 80%;
    min-width: 640px;
    max-width: 768px;
    margin-block-start: 48px;
    margin-block-end: 72px;
    margin-inline-start: auto;
    margin-inline-end: auto;
    padding-block-start: 48px;
    padding-block-end: 48px;
    padding-inline-start: 48px;
    padding-inline-end: 48px;
    border-radius: 2px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.32);
    background-color: white;
  }
  .section {
    max-height: none;
    overflow: visible;
  }
}

@media screen and (min-width: 900px) {
  .article__nav {
    position: relative;
    z-index: 1;
    float: right;
    width: 192px;
    margin-block-start: -1px;
    margin-block-end: 12px;
    margin-inline-start: 32px;
    margin-inline-end: -16px;
    padding-block-start: 12px;
    padding-block-end: 12px;
    padding-inline-start: 8px;
    padding-inline-end: 8px;
    border: 1px solid #ededed;
    border-radius: 2px;
  }
  .article__nav ol {
    margin-block-start: 12px;
    margin-block-end: 0;
  }
  .article__nav ol ol {
    margin-block-start: 0;
  }
}

[data-darkmode="dark"] body {
  background-color: #3d3d3d;
}

[data-darkmode="dark"] a {
  color: #6b90cc;
}

[data-darkmode="dark"] a:visited {
  color: #2f5189;
}

[data-darkmode="dark"] .container {
  background-color: #292929;
  color: #a3a3a3;
}

[data-darkmode="dark"] .article__nav {
  border-color: #333333;
}

@media (prefers-color-scheme: dark) {
  [data-darkmode="auto"] body {
    background-color: #3d3d3d;
  }
  [data-darkmode="auto"] a {
    color: #6b90cc;
  }
  [data-darkmode="auto"] a:visited {
    color: #2f5189;
  }
  [data-darkmode="auto"] .container {
    background-color: #292929;
    color: #a3a3a3;
  }
  [data-darkmode="auto"] .article__nav {
    border-color: #333333;
  }
}