:root {
  --bg: #ffffff;
  --bg-elev: #ffffff;
  --bg-subtle: #f5f6f8;
  --border: #e7e9ec;
  --border-strong: #d6d9de;

  --text: #15171c;
  --text-2: #555b66;
  --text-3: #8a9099;

  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --accent-soft: rgba(37, 99, 235, 0.08);

  --code-bg: #f6f8fa;
  --code-border: #e7e9ec;

  --hl-comment: #6e7781;
  --hl-keyword: #cf222e;
  --hl-string: #0a3069;
  --hl-number: #0550ae;
  --hl-title: #8250df;
  --hl-type: #953800;
  --hl-attr: #0550ae;

  --prose: 720px;
  --wide: 1080px;
  --radius: 8px;

  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
    "Liberation Mono", monospace;

  color-scheme: light;
}

html[data-theme="dark"] {
  --bg: #0e1116;
  --bg-elev: #161b22;
  --bg-subtle: #1a2029;
  --border: #262c36;
  --border-strong: #363d49;

  --text: #e6edf3;
  --text-2: #a4aeba;
  --text-3: #737d89;

  --accent: #58a6ff;
  --accent-hover: #79b8ff;
  --accent-soft: rgba(88, 166, 255, 0.12);

  --code-bg: #151b23;
  --code-border: #262c36;

  --hl-comment: #8b949e;
  --hl-keyword: #ff7b72;
  --hl-string: #a5d6ff;
  --hl-number: #79c0ff;
  --hl-title: #d2a8ff;
  --hl-type: #ffa657;
  --hl-attr: #79c0ff;

  color-scheme: dark;
}

/* ---------------------------------------------------------------- 基础 */
* {
  -webkit-tap-highlight-color: transparent;
}

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

body,
body.skin-simplememory {
  background: var(--bg) !important;
  color: var(--text);
  font-family: var(--sans) !important;
  font-size: 16px;
  line-height: 1.75;
  transition: background-color 0.2s ease, color 0.2s ease;
}

::selection {
  background: var(--accent-soft);
}

a {
  transition: color 0.15s ease, border-color 0.15s ease,
    background-color 0.15s ease, opacity 0.15s ease;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* SimpleMemory 未设 box-sizing，宽度 100% + padding 会撑破视口 */
#home,
#footer,
#nav_main,
#main,
#mainContent,
.forFlow,
#topics,
.postBody,
#cnblogs_post_body {
  box-sizing: border-box !important;
}

/* ------------------------------------------------- 博客园顶部全局导航 */
.navbar,
#top_nav {
  background: var(--bg) !important;
  box-shadow: none !important;
  border-bottom: 1px solid var(--border) !important;
  backdrop-filter: saturate(180%) blur(12px);
}

#nav_right .navbar-search,
.navbar > nav .navbar-search {
  background: var(--bg-subtle) !important;
}

html[data-theme="dark"] .navbar a:link,
html[data-theme="dark"] .navbar a:visited,
html[data-theme="dark"] .navbar > nav {
  color: var(--text-2);
}

#nav_main {
  max-width: var(--wide);
  margin: 0 auto;
  padding: 0 28px;
}

#nav_left a,
#nav_right a {
  color: var(--text-2);
  font-size: 13.5px;
  transition: color 0.15s ease;
  border-radius: 6px;
  padding: 4px 8px;
}

#nav_left a:hover,
#nav_right a:hover {
  color: var(--text);
  background: var(--bg-subtle);
}

#zzk_search_input {
  background: var(--bg-subtle) !important;
  color: var(--text) !important;
  border: 1px solid transparent !important;
  border-radius: 8px;
  transition: border-color 0.15s ease, background 0.15s ease;
}

#zzk_search_input:focus {
  border-color: var(--border-strong) !important;
  background: var(--bg) !important;
}

/* 暗色下把彩色 logo 压成单色，否则深灰字在深底上看不见 */
html[data-theme="dark"] #nav_left .navbar-branding img {
  filter: brightness(0) invert(1);
  opacity: 0.82;
}

/* ------------------------------------------------------ 页面容器 */
#home {
  width: 100% !important;
  max-width: var(--wide);
  min-width: 0 !important;
  margin: 0 auto !important;
  padding: 0 28px 80px !important;
  background: transparent !important;
  box-shadow: none !important;
}

#header {
  max-width: var(--prose);
  margin: 0 auto !important;
  padding: 0 !important;
  border: 0;
}

#blogTitle {
  position: relative;
  height: auto !important;
  padding: 52px 0 0 !important;
}

#lnkBlogLogo,
#blogLogo {
  display: none !important;
}

#blogTitle h1,
#Header1_HeaderTitle {
  float: none !important;
  margin: 0 !important;
  font-size: 28px !important;
  font-weight: 650 !important;
  line-height: 1.2 !important;
  letter-spacing: -0.025em;
  color: var(--text) !important;
}

/* 站名右侧的细描述，由 JS 按需插入 */
.r4-tagline {
  margin-top: 10px;
  font-size: 14px;
  color: var(--text-3);
  letter-spacing: 0.01em;
}

/* --------------------------------------------------------- 主题切换 */
.r4-theme-toggle {
  position: absolute;
  top: 54px;
  right: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg);
  color: var(--text-2);
  cursor: pointer;
  transition: color 0.15s ease, border-color 0.15s ease,
    background-color 0.15s ease, transform 0.15s ease;
}

.r4-theme-toggle:hover {
  color: var(--text);
  border-color: var(--border-strong);
  background: var(--bg-subtle);
}

.r4-theme-toggle:active {
  transform: scale(0.94);
}

.r4-theme-toggle svg {
  width: 17px;
  height: 17px;
  display: block;
}

html[data-theme="dark"] .r4-theme-toggle .r4-icon-moon,
html:not([data-theme="dark"]) .r4-theme-toggle .r4-icon-sun {
  display: none;
}

/* ------------------------------------------------------- 站点导航 */
#navigator {
  height: auto !important;
  margin: 30px 0 0 !important;
  padding: 0 0 16px !important;
  border: 0 !important;
  border-bottom: 1px solid var(--border) !important;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px 24px;
}

#navList {
  float: none !important;
  min-height: 0 !important;
  display: flex;
  flex-wrap: wrap;
  gap: 22px;
}

#navList li {
  float: none !important;
  margin: 0 !important;
}

#navList a {
  float: none !important;
  display: inline-block !important;
  width: auto !important;
  height: auto !important;
  padding: 0 !important;
  font-size: 14.5px !important;
  font-weight: 500 !important;
  line-height: 1.6;
  color: var(--text-2) !important;
}

#navList a:hover {
  color: var(--accent) !important;
}

/* 顶部已具备的站内入口，在博客导航里重复，去掉 */
#navList a#blog_nav_sitehome,
#navList a#blog_nav_newpost,
#navList li:has(a#blog_nav_sitehome),
#navList li:has(a#blog_nav_newpost) {
  display: none !important;
}

.blogStats {
  float: none !important;
  margin: 0 !important;
  font-size: 13px;
  color: var(--text-3);
  font-variant-numeric: tabular-nums;
}

/* ------------------------------------------------------------ 布局 */
#main {
  margin: 0 !important;
  padding: 40px 0 0 !important;
}

#mainContent {
  float: none !important;
  margin-left: 0 !important;
  width: 100% !important;
  overflow: visible !important;
}

#mainContent .forFlow,
.forFlow {
  float: none !important;
  margin: 0 auto !important;
  width: 100% !important;
  max-width: var(--prose);
}

/* 侧边栏彻底不用，目录改由 JS 生成在右侧 */
#sideBar {
  display: none !important;
}

#main > .clear {
  clear: both;
}

/* ------------------------------------------------------ 首页随笔列表 */
.day {
  margin: 0 !important;
  padding: 30px 0 !important;
  border-top: 1px solid var(--border);
  position: relative;
}

.day:first-child {
  border-top: 0;
  padding-top: 0 !important;
}

.dayTitle {
  display: none !important;
}

.day .postTitle {
  float: none !important;
  width: 100% !important;
  border: 0 !important;
  margin: 0 0 8px !important;
  font-size: 19px !important;
  font-weight: 600 !important;
  line-height: 1.5 !important;
  letter-spacing: -0.01em;
}

.day .postTitle a {
  padding-left: 0 !important;
  color: var(--text) !important;
}

.day .postTitle a:hover {
  color: var(--accent) !important;
}

.postCon {
  float: none !important;
  width: 100% !important;
  padding: 0 !important;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-2);
}

.c_b_p_desc {
  font-size: 15px !important;
  line-height: 1.7 !important;
  color: var(--text-2);
  overflow-wrap: break-word;
}

.c_b_p_desc_readmore {
  display: inline !important;
  color: var(--accent) !important;
  margin-left: 2px;
  white-space: nowrap;
}

.postDesc {
  float: none !important;
  width: 100% !important;
  background: none !important;
  padding: 0 !important;
  margin-top: 12px !important;
  font-size: 12.5px !important;
  line-height: 1.7 !important;
  color: var(--text-3) !important;
  font-variant-numeric: tabular-nums;
}

.postDesc a {
  color: var(--text-3) !important;
}

.postDesc a:hover {
  color: var(--accent) !important;
}

.topicListFooter,
#nav_next_page {
  margin-top: 40px !important;
  text-align: center !important;
}

/* ------------------------------------------------ 归档 / 分类列表页 */
.entrylistTitle,
.PostListTitle,
.thumbTitle {
  height: auto !important;
  line-height: 1.4 !important;
  margin: 0 0 8px !important;
  padding: 0 0 16px !important;
  font-size: 22px !important;
  font-weight: 600 !important;
  color: var(--text) !important;
  border-bottom: 1px solid var(--border) !important;
}

.entrylistDescription {
  padding: 0 !important;
  margin: 0 !important;
  text-align: left !important;
  color: var(--text-3) !important;
  font-size: 13px;
}

.entrylistItem {
  margin: 0 !important;
  padding: 26px 0 !important;
  min-height: 0 !important;
}

.entrylistPosttitle {
  border: 0 !important;
  padding: 0 !important;
  margin: 0 0 8px !important;
  font-size: 19px !important;
  font-weight: 600 !important;
  line-height: 1.5 !important;
  letter-spacing: -0.01em;
}

.entrylistPosttitle a,
.entrylistItemTitle {
  color: var(--text) !important;
  margin-left: 0 !important;
  text-decoration: none !important;
}

.entrylistPosttitle a:hover,
.entrylistItemTitle:hover {
  color: var(--accent) !important;
  margin-left: 0 !important;
}

.entrylistPostSummary {
  margin: 0 !important;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-2);
}

.entrylistItemPostDesc {
  margin-top: 12px !important;
  padding: 0 !important;
  font-size: 12.5px !important;
  color: var(--text-3) !important;
  font-variant-numeric: tabular-nums;
}

.entrylistItemPostDesc a {
  color: var(--text-3) !important;
}

.entrylistItemPostDesc a:hover {
  color: var(--accent) !important;
}

.postSeparator,
.entrylist .postSeparator {
  display: block !important;
  height: 1px !important;
  margin: 0 !important;
  padding: 0 !important;
  border: 0 !important;
  background: var(--border) !important;
  font-size: 0 !important;
  line-height: 0 !important;
}

.pager {
  margin: 40px 0 0 !important;
  text-align: center !important;
}

.pager a,
.pager span {
  display: inline-block !important;
  margin: 0 3px !important;
  padding: 5px 11px !important;
  border: 1px solid var(--border) !important;
  border-radius: 7px !important;
  box-shadow: none !important;
  background: var(--bg) !important;
  color: var(--text-2) !important;
  font-size: 13.5px !important;
  text-decoration: none !important;
}

.pager a:hover {
  border-color: var(--accent) !important;
  color: var(--accent) !important;
  background: var(--bg) !important;
}

/* ---------------------------------------------------------- 文章页 */
#topics {
  float: none !important;
  width: 100% !important;
}

#topics .postTitle {
  float: none !important;
  width: 100% !important;
  margin: 0 0 16px !important;
  font-size: 34px !important;
  font-weight: 650 !important;
  line-height: 1.3 !important;
  letter-spacing: -0.025em;
}

#topics .postTitle a {
  color: var(--text) !important;
}

#cnblogs_post_body {
  margin-top: 34px;
  overflow-wrap: break-word;
}

/* 博客园 markdown 文章开头常自带与标题重复的一级标题 */
#cnblogs_post_body > h1:first-child {
  display: none !important;
}

/* ---------------------------------------------------------- 正文排版 */
.postBody,
.blogpost-body {
  font-size: 16px !important;
  line-height: 1.78 !important;
  color: var(--text);
}

#cnblogs_post_body p,
.postBody p,
.postCon p {
  text-indent: 0 !important;
  margin: 0 0 1.15em !important;
  line-height: 1.78;
}

#cnblogs_post_body h1,
#cnblogs_post_body h2,
#cnblogs_post_body h3,
#cnblogs_post_body h4,
#cnblogs_post_body h5,
#cnblogs_post_body h6 {
  font-weight: 600 !important;
  line-height: 1.4 !important;
  letter-spacing: -0.015em;
  margin: 2em 0 0.7em !important;
  scroll-margin-top: 96px;
}

#cnblogs_post_body h1 {
  font-size: 1.6em !important;
}

#cnblogs_post_body h2 {
  font-size: 1.34em !important;
}

#cnblogs_post_body h3 {
  font-size: 1.12em !important;
}

#cnblogs_post_body h4,
#cnblogs_post_body h5,
#cnblogs_post_body h6 {
  font-size: 1em !important;
  color: var(--text-2);
}

#cnblogs_post_body a {
  color: var(--accent) !important;
  text-decoration: none !important;
  border-bottom: 1px solid transparent;
}

#cnblogs_post_body a:hover {
  border-bottom-color: currentColor;
}

#cnblogs_post_body ul,
#cnblogs_post_body ol {
  margin: 0 0 1.15em !important;
  padding-left: 1.55em !important;
}

#cnblogs_post_body ul li {
  list-style-type: disc !important;
}

#cnblogs_post_body ol li {
  list-style-type: decimal !important;
}

#cnblogs_post_body li {
  margin-bottom: 0.45em !important;
  line-height: 1.78;
}

#cnblogs_post_body li::marker {
  color: var(--text-3);
}

#cnblogs_post_body li > p {
  margin-bottom: 0.45em !important;
}

#cnblogs_post_body blockquote {
  background: none !important;
  border-left: 3px solid var(--border-strong) !important;
  margin: 0 0 1.2em !important;
  padding: 0.15em 0 0.15em 1.15em !important;
  color: var(--text-2) !important;
  line-height: 1.78;
}

#cnblogs_post_body blockquote p:last-child {
  margin-bottom: 0 !important;
}

#cnblogs_post_body img {
  max-width: 100% !important;
  height: auto;
  border-radius: 6px;
}

#cnblogs_post_body p > img {
  display: block;
  margin: 1.3em auto;
}

#cnblogs_post_body hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 2.4em 0;
}

#cnblogs_post_body table {
  width: 100%;
  border-collapse: collapse;
  margin: 0 0 1.3em;
  font-size: 14.5px;
  line-height: 1.6;
}

#cnblogs_post_body th,
#cnblogs_post_body td {
  border: 1px solid var(--border);
  padding: 8px 12px;
  text-align: left;
}

#cnblogs_post_body th {
  background: var(--bg-subtle);
  font-weight: 600;
}

#cnblogs_post_body tbody tr:nth-child(even) {
  background: color-mix(in srgb, var(--bg-subtle) 55%, transparent);
}

/* ------------------------------------------------------- 行内代码 */
#cnblogs_post_body :not(pre, div) > code,
.cnblogs-markdown :not(pre, div, td) > code {
  display: inline !important;
  vertical-align: baseline !important;
  font-family: var(--mono) !important;
  font-size: 0.87em !important;
  line-height: 1.6 !important;
  padding: 0.12em 0.38em !important;
  border-radius: 4px;
  color: var(--hl-keyword);
  background: color-mix(in srgb, var(--text) 6%, transparent);
  border: 0 !important;
  white-space: break-spaces;
}

/* ------------------------------------------------------- 代码块 */
#cnblogs_post_body pre,
.cnblogs-markdown pre {
  position: relative;
  background: var(--code-bg) !important;
  border: 1px solid var(--code-border) !important;
  border-radius: var(--radius) !important;
  padding: 34px 18px 16px !important;
  margin: 0 0 1.4em !important;
  overflow-x: auto;
  font-size: 13.5px !important;
  line-height: 1.65 !important;
  tab-size: 4;
}

#cnblogs_post_body pre code,
.cnblogs-markdown pre code {
  background: transparent !important;
  border: 0 !important;
  padding: 0 !important;
  font-family: var(--mono) !important;
  font-size: inherit !important;
  line-height: inherit !important;
  color: var(--text) !important;
  display: block !important;
}

#cnblogs_post_body pre::-webkit-scrollbar {
  height: 8px;
}

#cnblogs_post_body pre::-webkit-scrollbar-thumb {
  background: var(--border-strong);
  border-radius: 4px;
}

#cnblogs_post_body pre::-webkit-scrollbar-track {
  background: transparent;
}

.cnblogs_code {
  background: var(--code-bg) !important;
  border: 1px solid var(--code-border) !important;
  border-radius: var(--radius) !important;
  padding: 12px !important;
}

/* 代码块工具条（由 JS 注入） */
.r4-pre-wrap {
  position: relative;
}

.r4-pre-bar {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 10px 0 18px;
  font-size: 11.5px;
  line-height: 1;
  color: var(--text-3);
  pointer-events: none;
}

.r4-lang {
  font-family: var(--mono);
  letter-spacing: 0.04em;
  text-transform: lowercase;
  opacity: 0.85;
  pointer-events: none;
}

.r4-copy {
  pointer-events: auto;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 8px;
  border: 1px solid transparent;
  border-radius: 5px;
  background: transparent;
  color: var(--text-3);
  font-family: var(--sans);
  font-size: 11.5px;
  cursor: pointer;
  opacity: 0.45;
  transition: opacity 0.15s ease, color 0.15s ease, border-color 0.15s ease,
    background 0.15s ease;
}

.r4-pre-wrap:hover .r4-copy,
.r4-copy:focus-visible {
  opacity: 1;
}

/* 触屏设备没有 hover，复制按钮常驻 */
@media (hover: none) {
  .r4-copy {
    opacity: 1;
  }
}

.r4-copy:hover {
  color: var(--text);
  border-color: var(--border-strong);
  background: var(--bg);
}

.r4-copy.is-done {
  color: #1a7f37;
  opacity: 1;
}

html[data-theme="dark"] .r4-copy.is-done {
  color: #3fb950;
}

/* ------------------------------------------- 代码高亮配色（变量驱动） */
#cnblogs_post_body .hljs-comment,
#cnblogs_post_body .hljs-quote {
  color: var(--hl-comment);
  font-style: italic;
}

#cnblogs_post_body .hljs-keyword,
#cnblogs_post_body .hljs-selector-tag,
#cnblogs_post_body .hljs-doctag,
#cnblogs_post_body .hljs-template-tag {
  color: var(--hl-keyword);
}

#cnblogs_post_body .hljs-string,
#cnblogs_post_body .hljs-regexp,
#cnblogs_post_body .hljs-meta .hljs-string {
  color: var(--hl-string);
}

#cnblogs_post_body .hljs-number,
#cnblogs_post_body .hljs-literal,
#cnblogs_post_body .hljs-variable,
#cnblogs_post_body .hljs-template-variable {
  color: var(--hl-number);
}

#cnblogs_post_body .hljs-title,
#cnblogs_post_body .hljs-title.function_,
#cnblogs_post_body .hljs-section {
  color: var(--hl-title);
}

#cnblogs_post_body .hljs-title.class_,
#cnblogs_post_body .hljs-type,
#cnblogs_post_body .hljs-built_in {
  color: var(--hl-type);
}

#cnblogs_post_body .hljs-attr,
#cnblogs_post_body .hljs-attribute,
#cnblogs_post_body .hljs-property,
#cnblogs_post_body .hljs-symbol,
#cnblogs_post_body .hljs-bullet,
#cnblogs_post_body .hljs-link {
  color: var(--hl-attr);
}

#cnblogs_post_body .hljs-meta {
  color: var(--hl-comment);
}

#cnblogs_post_body .hljs-emphasis {
  font-style: italic;
}

#cnblogs_post_body .hljs-strong {
  font-weight: 600;
}

/* ------------------------------------------------------- 文章元信息 */
#topics .postDesc {
  margin-top: 44px !important;
  padding: 18px 0 0 !important;
  border-top: 1px solid var(--border);
  font-size: 13px !important;
  color: var(--text-3) !important;
}

#EntryTag {
  margin: 26px 0 0 !important;
  font-size: 12.5px !important;
  color: var(--text-3);
}

#EntryTag a,
#BlogPostCategory a,
#BlogCollection a {
  display: inline-block;
  margin: 0 6px 6px 0 !important;
  padding: 3px 10px !important;
  font-size: 12.5px !important;
  line-height: 1.65 !important;
  color: var(--text-2) !important;
  background: var(--bg-subtle) !important;
  border-radius: 999px !important;
  text-decoration: none !important;
}

#EntryTag a:hover,
#BlogPostCategory a:hover,
#BlogCollection a:hover {
  color: var(--accent) !important;
  background: var(--accent-soft) !important;
}

#BlogPostCategory,
#BlogCollection {
  margin: 10px 0 0 !important;
  font-size: 12.5px !important;
  color: var(--text-3);
}

/* ------------------------------------------------- 右侧目录（JS 注入） */
.r4-toc {
  display: none;
}

.r4-toc > summary {
  list-style: none;
  cursor: pointer;
}

.r4-toc > summary::-webkit-details-marker {
  display: none;
}

@media (min-width: 1240px) {
  .r4-toc {
    display: block;
    position: fixed;
    top: 300px;
    left: calc(50% + 360px + 44px);
    width: 240px;
    max-height: calc(100vh - 360px);
    overflow-y: auto;
    font-size: 13px;
    line-height: 1.55;
    scrollbar-width: thin;
  }

  .r4-toc::-webkit-scrollbar {
    width: 4px;
  }

  .r4-toc::-webkit-scrollbar-thumb {
    background: var(--border-strong);
    border-radius: 2px;
  }
}

/* 窄屏：目录改为正文上方的可折叠块 */
@media (max-width: 1239px) {
  .r4-toc {
    display: block;
    position: static;
    margin: 0 0 32px;
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: var(--bg-subtle);
    max-height: none;
    overflow: visible;
    font-size: 14px;
    line-height: 1.6;
  }

  .r4-toc ul {
    border-left: 0;
  }

  .r4-toc li a {
    padding: 4px 0;
    border-left: 0;
  }

  .r4-toc li.is-h3 a {
    padding-left: 16px;
    font-size: 13.5px;
  }

  .r4-toc li a.is-active {
    color: var(--accent) !important;
  }
}

.r4-toc-title {
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: 10px;
  padding-left: 12px;
}

.r4-toc ul {
  list-style: none !important;
  margin: 0 !important;
  padding: 0 !important;
  border-left: 1px solid var(--border);
}

.r4-toc li {
  margin: 0 !important;
  padding: 0 !important;
  line-height: 1.5;
  list-style: none !important;
}

.r4-toc li a {
  display: block;
  padding: 5px 10px 5px 12px;
  margin-left: -1px;
  border-left: 2px solid transparent;
  color: var(--text-3) !important;
  text-decoration: none !important;
  border-bottom: 0 !important;
  transition: color 0.15s ease, border-color 0.15s ease;
}

.r4-toc li a:hover {
  color: var(--text) !important;
}

.r4-toc li.is-h3 a {
  padding-left: 24px;
  font-size: 12.5px;
}

.r4-toc li a.is-active {
  color: var(--accent) !important;
  border-left-color: var(--accent);
}

/* --------------------------------------------------------- 阅读进度 */
.r4-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  width: 0;
  background: var(--accent);
  z-index: 9999;
  transition: width 0.08s linear;
  pointer-events: none;
}

/* --------------------------------------------------------- 返回顶部 */
.r4-backtop {
  position: fixed;
  right: 26px;
  bottom: 26px;
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  border-radius: 50%;
  background: var(--bg-elev);
  color: var(--text-2);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(6px);
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s,
    color 0.15s ease, border-color 0.15s ease;
  z-index: 900;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.06);
}

.r4-backtop.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.r4-backtop:hover {
  color: var(--text);
  border-color: var(--border-strong);
}

.r4-backtop svg {
  width: 16px;
  height: 16px;
}

/* ------------------------------------------------------- 图片放大 */
/* 图片点击放大交给博客园自带的 zoomManager，这里不再覆盖，
   否则两套放大叠加会出现“点两次才关闭”的问题。 */

/* ------------------------------------------------------- 评论区 */
#comment_nav {
  margin: 22px 0 0 !important;
  font-size: 12.5px !important;
  color: var(--text-3) !important;
}

#comment_nav a {
  color: var(--text-3) !important;
  margin-left: 14px;
  text-decoration: none;
}

#comment_nav a:hover {
  color: var(--accent) !important;
}

#comment_form_container,
#blog_post_info_block,
.commentform {
  font-size: 15px;
}

.feedback_area_title,
#commentform_title {
  font: 600 16px/1.5 var(--sans) !important;
  margin: 52px 0 8px !important;
  padding-bottom: 12px !important;
  border-bottom: 1px solid var(--border) !important;
  color: var(--text) !important;
}

.feedbackItem {
  margin-top: 0 !important;
  padding: 20px 0;
  border-bottom: 1px solid var(--border);
}

.feedbackCon {
  background: none !important;
  border: 0 !important;
  padding: 0 !important;
  color: var(--text);
}

.feedbackListSubtitle {
  background: none !important;
  color: var(--text-3) !important;
  font-size: 13px !important;
  padding: 0 0 8px !important;
}

.feedbackListSubtitle a {
  color: var(--text-2) !important;
}

#comment_form_container .author,
#comment_form_container .comment_textarea,
.commenttb,
.commentTextBox {
  border: 1px solid var(--border) !important;
  border-radius: var(--radius) !important;
  background: var(--bg) !important;
  color: var(--text) !important;
  box-shadow: none !important;
  font-family: var(--sans);
  font-size: 14px;
  padding: 10px 12px;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

#comment_form_container .author:focus,
#comment_form_container .comment_textarea:focus,
.commenttb:focus,
.commentTextBox:focus {
  border-color: var(--accent) !important;
  outline: none;
  box-shadow: 0 0 0 3px var(--accent-soft) !important;
}

.comment_btn,
#AjaxHolder_PostComment_btnSubmit {
  background: var(--text) !important;
  color: var(--bg) !important;
  border: 0 !important;
  border-radius: 7px !important;
  padding: 9px 18px !important;
  font-size: 14px !important;
  font-weight: 500;
  cursor: pointer;
  transition: opacity 0.15s ease;
}

.comment_btn:hover,
#AjaxHolder_PostComment_btnSubmit:hover {
  opacity: 0.85;
}

/* ---------------------------------------------------------- 页脚 */
#footer {
  max-width: var(--prose);
  margin: 72px auto 0 !important;
  padding: 26px 0 44px !important;
  border-top: 1px solid var(--border) !important;
  font-size: 12.5px !important;
  line-height: 1.9;
  color: var(--text-3) !important;
  text-align: left;
}

#footer a {
  color: var(--text-3) !important;
}

#footer a:hover {
  color: var(--accent) !important;
}

.footer-icp a {
  margin-right: 12px;
}

/* -------------------------------------------------------- 响应式 */
@media (max-width: 767px) {
  #home {
    padding: 0 18px 56px !important;
  }

  #blogTitle {
    padding-top: 26px !important;
  }

  #blogTitle h1 {
    font-size: 23px !important;
  }

  .r4-theme-toggle {
    top: 26px;
    width: 34px;
    height: 34px;
  }

  #navigator {
    margin-top: 20px !important;
  }

  #navList {
    gap: 16px;
  }

  #main {
    padding-top: 28px !important;
  }

  #topics .postTitle {
    font-size: 25px !important;
  }

  .day {
    padding: 24px 0 !important;
  }

  .day .postTitle {
    font-size: 17.5px !important;
  }

  .blogpost-body,
  .blogpost-body p,
  .blogpost-body li {
    font-size: 15.5px !important;
  }

  .blogpost-body img,
  .blog_comment_body img {
    max-width: 100% !important;
  }

  #cnblogs_post_body pre {
    padding: 32px 14px 14px !important;
    font-size: 12.8px !important;
  }

  .r4-backtop {
    right: 16px;
    bottom: 16px;
  }

  #footer {
    margin-top: 48px !important;
    padding: 20px 0 32px !important;
  }
}

@media (max-width: 767px) {
  #top_nav {
    display: none !important;
  }
}

/* ==========================================================================
   可选：隐藏博客园底部广告卡片（自行决定是否启用）
   ========================================================================== */
/*
#blog_c1,
#under_post_card1,
#under_post_card2,
#cnblogs_ch,
#opt_under_post,
.ad_text_commentbox,
#blog_c2 {
  display: none !important;
}
*/