fix

_sass/abstracts/_breakpoints.scss

@@ -0,0 +1,73 @@
+@use 'sass:map';
+
+$-breakpoints: (
+  // 1 column
+  sm: 576px,
+  md: 768px,
+  // 2 columns
+  lg: 850px,
+  // 3 columns
+  xl: 1200px,
+  xxl: 1400px,
+  xxxl: 1650px
+);
+
+@function get($breakpoint) {
+  @return map.get($-breakpoints, $breakpoint);
+}
+
+/* Less than the given width */
+@mixin lt($width) {
+  @media all and (max-width: calc(#{$width} - 1px)) {
+    @content;
+  }
+}
+
+/* Less than or equal to the given width */
+@mixin lte($width) {
+  @media all and (max-width: $width) {
+    @content;
+  }
+}
+
+@mixin sm {
+  @media all and (min-width: get(sm)) {
+    @content;
+  }
+}
+
+@mixin md {
+  @media all and (min-width: get(md)) {
+    @content;
+  }
+}
+
+@mixin lg {
+  @media all and (min-width: get(lg)) {
+    @content;
+  }
+}
+
+@mixin xl {
+  @media all and (min-width: get(xl)) {
+    @content;
+  }
+}
+
+@mixin xxl {
+  @media all and (min-width: get(xxl)) {
+    @content;
+  }
+}
+
+@mixin xxxl {
+  @media all and (min-width: get(xxxl)) {
+    @content;
+  }
+}
+
+@mixin between($min, $max) {
+  @media all and (min-width: $min) and (max-width: $max) {
+    @content;
+  }
+}

_sass/abstracts/_index.scss

@@ -0,0 +1,4 @@
+@forward 'variables';
+@forward 'mixins';
+@forward 'placeholders';
+@forward 'breakpoints';

_sass/abstracts/_mixins.scss

@@ -0,0 +1,80 @@
+@mixin text-ellipsis {
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+@mixin mt-mb($value) {
+  margin-top: $value;
+  margin-bottom: $value;
+}
+
+@mixin ml-mr($value) {
+  margin-left: $value;
+  margin-right: $value;
+}
+
+@mixin pt-pb($val) {
+  padding-top: $val;
+  padding-bottom: $val;
+}
+
+@mixin pl-pr($val, $important: false) {
+  @if $important {
+    padding-left: $val !important;
+    padding-right: $val !important;
+  } @else {
+    padding-left: $val;
+    padding-right: $val;
+  }
+}
+
+@mixin placeholder {
+  color: var(--text-muted-color) !important;
+}
+
+@mixin placeholder-focus {
+  opacity: 0.6;
+}
+
+@mixin label($font-size: 1rem, $font-weight: 600, $color: var(--label-color)) {
+  color: $color;
+  font-size: $font-size;
+  font-weight: $font-weight;
+}
+
+@mixin align-center {
+  position: relative;
+  left: 50%;
+  transform: translateX(-50%);
+}
+
+@mixin prompt($type, $fa-content, $fa-style: 'solid', $rotate: 0) {
+  &.prompt-#{$type} {
+    background-color: var(--prompt-#{$type}-bg);
+
+    &::before {
+      content: $fa-content;
+      color: var(--prompt-#{$type}-icon-color);
+      font: var(--fa-font-#{$fa-style});
+
+      @if $rotate != 0 {
+        transform: rotate(#{$rotate}deg);
+      }
+    }
+  }
+}
+
+@mixin slide($append: null) {
+  $basic: transform 0.4s ease;
+
+  @if $append {
+    transition: $basic, $append;
+  } @else {
+    transition: $basic;
+  }
+}
+
+@mixin max-w-100 {
+  max-width: 100%;
+}

_sass/abstracts/_placeholders.scss

@@ -0,0 +1,160 @@
+@use 'variables' as v;
+@use 'mixins' as mx;
+
+%heading {
+  color: var(--heading-color);
+  font-weight: 400;
+  font-family: v.$font-family-heading;
+  scroll-margin-top: 3.5rem;
+}
+
+%anchor {
+  .anchor {
+    font-size: 80%;
+  }
+
+  @media (hover: hover) {
+    .anchor {
+      visibility: hidden;
+      opacity: 0;
+      transition: opacity 0.25s ease-in, visibility 0s ease-in 0.25s;
+    }
+
+    &:hover {
+      .anchor {
+        visibility: visible;
+        opacity: 1;
+        transition: opacity 0.25s ease-in, visibility 0s ease-in 0s;
+      }
+    }
+  }
+}
+
+%tag-hover {
+  background: var(--tag-hover);
+  transition: background 0.35s ease-in-out;
+}
+
+%table-cell {
+  padding: 0.4rem 1rem;
+  font-size: 95%;
+  white-space: nowrap;
+}
+
+%link-hover {
+  color: #d2603a !important;
+  border-bottom: 1px solid #d2603a;
+  text-decoration: none;
+}
+
+%link-color {
+  color: var(--link-color);
+}
+
+%link-underline {
+  border-bottom: 1px solid var(--link-underline-color);
+}
+
+%clickable-transition {
+  transition: all 0.3s ease-in-out;
+}
+
+%no-cursor {
+  -webkit-user-select: none;
+  -moz-user-select: none;
+  -ms-user-select: none;
+  user-select: none;
+}
+
+%no-bottom-border {
+  border-bottom: none;
+}
+
+%cursor-pointer {
+  cursor: pointer;
+}
+
+%normal-font-style {
+  font-style: normal;
+}
+
+%rounded {
+  border-radius: v.$radius-lg;
+}
+
+%img-caption {
+  + em {
+    display: block;
+    text-align: center;
+    font-style: normal;
+    font-size: 80%;
+    padding: 0;
+    color: #6d6c6c;
+  }
+}
+
+%sidebar-links {
+  color: var(--sidebar-muted-color);
+  -webkit-user-select: none;
+  -moz-user-select: none;
+  -ms-user-select: none;
+  user-select: none;
+}
+
+%text-clip {
+  display: -webkit-box;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  -webkit-line-clamp: 2;
+  -webkit-box-orient: vertical;
+}
+
+%text-ellipsis {
+  @include mx.text-ellipsis;
+}
+
+%text-highlight {
+  color: var(--text-muted-highlight-color);
+  font-weight: 600;
+}
+
+%text-sm {
+  font-size: 0.85rem;
+}
+
+%text-xs {
+  font-size: 0.8rem;
+}
+
+%sup-fn-target {
+  &:target {
+    background-color: var(--footnote-target-bg);
+    width: -moz-fit-content;
+    width: -webkit-fit-content;
+    width: fit-content;
+    transition: background-color 1.75s ease-in-out;
+  }
+}
+
+%btn-color {
+  button i {
+    color: #999999;
+  }
+}
+
+%code-snippet-bg {
+  background-color: var(--highlight-bg-color);
+}
+
+%code-snippet-padding {
+  padding-left: 1rem;
+  padding-right: 1.5rem;
+}
+
+%max-w-100 {
+  max-width: 100%;
+}
+
+%panel-border {
+  border-left: 1px solid var(--main-border-color);
+}

_sass/abstracts/_variables.scss

@@ -0,0 +1,30 @@
+/* sidebar */
+
+$sidebar-width: 260px !default; /* the basic width */
+$sidebar-width-large: 300px !default; /* screen width: >= 1650px */
+$sb-btn-gap: 0.8rem !default;
+$sb-btn-gap-lg: 1rem !default;
+
+/* other framework sizes */
+
+$topbar-height: 3rem !default;
+$search-max-width: 200px !default;
+$footer-height: 5rem !default;
+$footer-height-large: 6rem !default; /* screen width: < 850px */
+$main-content-max-width: 1250px !default;
+$radius-sm: 6px !default;
+$radius-lg: 10px !default;
+$back2top-size: 2.75rem !default;
+
+/* syntax highlight */
+
+$code-font-size: 0.85rem !default;
+$code-header-height: 2.25rem !default;
+$code-dot-size: 0.75rem !default;
+$code-dot-gap: 0.5rem !default;
+$code-icon-width: 1.75rem !default;
+
+/* fonts */
+
+$font-family-base: 'Source Sans Pro', 'Microsoft Yahei', sans-serif !default;
+$font-family-heading: Lato, 'Microsoft Yahei', sans-serif !default;