.post h2 {
  font-size: 1.5em; 
  font-weight: bold;
  /*background:#B9D3EE;*/
  /*text-align: center;*/
  padding-left: 20px;
  margin-top: 5px;
  margin-bottom: 5px;
  border-left: 3px solid #1874CD; 
}

/* 文章描述样式：description */
.post-description {
  font-size: 1.1em;
  color: #666;
  font-style: italic;
  margin: 15px 0 20px 0;
  padding: 10px 15px;
  background-color: #f8f9fa;
  border-left: 4px solid #007bff;
  border-radius: 3px;
}

/* 文章内容样式 */
.post h3 {
  font-size: 1.3em;
  font-weight: bold;
  margin-top: 5px;
  margin-bottom: 5px;
  color: #333;
}

.post p {
  margin-bottom: 6px; /* 段落底部间距 */
  /* text-indent: 0; 不缩进 */
  line-height: 1.35; /* 中文段落行高 */
  color: #555;
  word-wrap: break-word;
  white-space: normal;
}

.post ul, .post ol {
  margin-bottom: 6px; /* 列表底部间距 */
  padding-left: 12px; /* 列表缩进 */
  line-height: 1.35; /* 列表行高 */
}

.post li {
  margin-bottom: 0px; /* 列表项底部间距 */
  line-height: 1.35; /* 列表项行高 */
  word-wrap: break-word;
}

/* 列表样式 */
.post ul li {
  list-style-type: disc;
}

.post ol li {
  list-style-type: decimal;
  margin-top: -2px; /* 向上压缩间距 */
}

.post strong {
  font-weight: bold;
  color: #333;
}

.post em {
  font-style: italic;
}

/* 引用和代码块样式 */
.post blockquote {
  margin: 20px 0;
  padding: 15px;
  background-color: #f9f9f9;
  border-left: 4px solid #ddd;
  font-style: italic;
  word-wrap: break-word;
}

.post code {
  background-color: #f4f4f4;
  padding: 2px 4px;
  border-radius: 3px;
  font-family: 'Courier New', monospace;
  word-wrap: break-word;
}

.post pre {
  background-color: #f4f4f4;
  padding: 15px;
  border-radius: 5px;
  overflow-x: auto;
  margin: 20px 0;
  line-height: 1.4;
}

/* 图片样式辅助类 */
.post img.left {
  float: left;
  margin: 0 15px 15px 0;
}

.post img.right {
  float: right;
  margin: 0 0 15px 15px;
}

.post img.center {
  display: block;
  margin: 0 auto;
}

.post img.w-50 { width: 50%; }
.post img.w-75 { width: 75%; }
.post img.w-100 { width: 100%; }

.post a {
  color: #1874CD;
  text-decoration: none;
}

.post a:hover {
  text-decoration: underline;
}

/* 确保文章内容区域正确换行 */
.post {
  word-wrap: break-word;
  overflow-wrap: break-word;
  line-height: 1.35; /* 这里是中文段落的行高 */
  white-space: normal;
}

/* Keep MathJax formulas in the normal text flow. Tables and code blocks handle
   their own scrolling; formulas should not show nested scrollbars. */
.post mjx-container {
  max-width: none;
  overflow: visible !important;
}

.post mjx-container[display="true"] {
  display: block;
  margin: 1em 0;
  padding: 0.25em 0;
  overflow: visible !important;
}

.post mjx-container:not([display="true"]) {
  display: inline-block;
  max-width: none;
  overflow: visible !important;
  vertical-align: middle;
}

/* 修复中文段落间距 */
.post > p {
  margin-bottom: 0.2em;
  text-indent: 0;
}

/* 确保列表项正确换行 */
.post ul li, .post ol li {
  word-break: break-word;
  overflow-wrap: break-word;
}

/* Reading polish for posts and simple pages */
.post {
  color: var(--lz-text);
  font-size: 1.02rem;
  line-height: 1.78;
}

.post p {
  margin: 0.85em 0;
  padding-left: 0;
  line-height: inherit;
  color: var(--lz-text);
}

.post h2 {
  margin: 2.1em 0 0.8em;
  padding-left: 14px;
  border-left: 4px solid var(--lz-accent);
  color: #172033;
  font-size: 1.65rem;
  line-height: 1.35;
}

.post h3 {
  margin: 1.7em 0 0.65em;
  padding: 0;
  background: transparent;
  border-left: 0;
  box-shadow: none;
  color: #253041;
  font-size: 1.22rem;
  line-height: 1.45;
}

.post h4 {
  margin: 1.35em 0 0.55em;
  padding: 0;
  color: #334155;
  font-size: 1.08rem;
  line-height: 1.45;
}

.post h5 {
  margin: 1.2em 0 0.45em;
  color: #475569;
}

.post ul,
.post ol {
  margin: 0.8em 0 1em;
  padding-left: 1.35rem;
  line-height: inherit;
}

.post li {
  margin-bottom: 0.42em;
  line-height: inherit;
}

.post blockquote {
  margin: 1.5em 0;
  padding: 0.95em 1.1em;
  background: #f7fbfa;
  border-left: 4px solid var(--lz-accent);
  border-radius: 0 8px 8px 0;
  color: #334155;
  font-style: normal;
}

.post code {
  padding: 0.12em 0.36em;
  background: #eff6ff;
  border: 1px solid #dbeafe;
  border-radius: 4px;
  color: #1e3a8a;
  font-size: 0.92em;
}

.post pre {
  margin: 1.4em 0;
  padding: 1.1em 1.2em;
  background: #f8fafc;
  border: 1px solid var(--lz-border);
  border-radius: 8px;
  line-height: 1.6;
}

.post table {
  display: table;
  width: 100%;
  table-layout: auto;
  overflow: visible;
  white-space: normal;
}

.post th,
.post td {
  min-width: 120px;
}

.post img {
  margin: 1.6em auto;
  border-radius: 8px;
}

.post a {
  color: var(--lz-link);
  text-underline-offset: 3px;
}

.post a:hover {
  color: var(--lz-accent);
}

.post-description {
  margin: 16px 0 0;
  padding: 12px 16px;
  background: rgba(247, 252, 253, 0.8);
  border-left-color: var(--lz-accent);
  border-radius: 10px;
  color: #26384a;
  font-style: normal;
  line-height: 1.65;
}

.post-toc {
  position: relative;
  box-sizing: border-box;
  width: 100%;
  margin: 0 0 34px;
  padding: 24px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.58);
  border-radius: 18px;
  box-shadow: 0 20px 48px rgba(41, 72, 88, 0.11);
  isolation: isolate;
  transition: background-color 180ms ease, border-color 180ms ease, color 180ms ease, box-shadow 180ms ease;
}

.post-toc::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 5px;
  background: linear-gradient(90deg, var(--lz-accent) 0%, #60a5fa 52%, rgba(96, 165, 250, 0) 100%);
}

.post-toc__title {
  display: flex;
  align-items: center;
  gap: 9px;
  margin: 0 0 16px;
  padding: 0;
  border-left: 0;
  color: #172033;
  font-size: 1.08rem;
  font-weight: 750;
  line-height: 1.4;
  letter-spacing: 0;
}

.post-toc__title::before {
  content: "";
  width: 8px;
  height: 22px;
  flex: 0 0 auto;
  border-radius: 999px;
  background: linear-gradient(180deg, var(--lz-accent) 0%, #60a5fa 100%);
}

.post-toc__title::after {
  content: "";
  height: 1px;
  flex: 1 1 auto;
  background: linear-gradient(90deg, rgba(20, 184, 166, 0.28), rgba(96, 165, 250, 0));
}

.post-pager {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  max-width: 940px;
  margin: 30px auto 44px;
  position: relative;
  z-index: 1;
}

.post-pager__item {
  display: flex;
  min-height: 76px;
  flex-direction: column;
  justify-content: center;
  padding: 18px 22px;
  background: rgba(255, 255, 255, 0.94);
  border: 1px solid rgba(184, 204, 214, 0.52);
  border-radius: 16px;
  box-shadow: 0 18px 42px rgba(41, 72, 88, 0.14);
  color: #111827;
  text-decoration: none;
  text-shadow: none;
  transition: background-color 180ms ease, border-color 180ms ease, color 180ms ease, box-shadow 180ms ease, transform 180ms ease;
}

.post-pager__item--next {
  grid-column: 2;
  align-items: flex-end;
  text-align: right;
}

.post-pager__label {
  margin-bottom: 6px;
  color: #174b66;
  font-size: 0.86rem;
  font-weight: 800;
}

.post-pager__title {
  color: #111827;
  font-size: 1rem;
  font-weight: 800;
  line-height: 1.45;
  overflow-wrap: anywhere;
}

.post-pager__item:hover {
  background: rgba(255, 255, 255, 0.98);
  color: #111827;
  text-decoration: none;
  transform: translateY(-1px);
}

.post-toc ul,
.post-toc ol {
  margin: 0;
  padding-left: 0;
  list-style: none;
}

.post-toc > ul,
.post-toc > ol {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(260px, 100%), 1fr));
  align-items: start;
  gap: 12px 16px;
}

.post-toc > ul > li,
.post-toc > ol > li {
  min-width: 0;
  padding: 5px 5px 7px;
  border: 1px solid rgba(143, 168, 158, 0.18);
  border-radius: 13px;
  background: rgba(255, 255, 252, 0.44);
}

.post-toc li {
  min-width: 0;
  margin: 0;
}

.post-toc li ul,
.post-toc li ol {
  margin: 7px 0 2px 12px;
  padding-left: 11px;
  border-left: 1px solid rgba(20, 184, 166, 0.25);
}

.post-toc li li {
  margin: 3px 0;
}

.post-toc a {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: 6px 10px;
  border-radius: 10px;
  color: #475569;
  line-height: 1.48;
  text-decoration: none;
  overflow-wrap: anywhere;
}

.post-toc a::before {
  content: "";
  width: 5px;
  height: 5px;
  flex: 0 0 auto;
  margin-top: 0.72em;
  border-radius: 999px;
  background: rgba(20, 184, 166, 0.42);
  box-shadow: 0 0 0 3px rgba(20, 184, 166, 0.08);
}

.post-toc > ul > li > a,
.post-toc > ol > li > a {
  padding: 8px 10px;
  background: rgba(255, 255, 252, 0.66);
  border: 1px solid rgba(143, 168, 158, 0.22);
  color: #1e293b;
  font-weight: 700;
}

.post-toc > ul > li > a::before,
.post-toc > ol > li > a::before {
  width: 7px;
  height: 7px;
  margin-top: 0.62em;
  background: var(--lz-accent);
  box-shadow: 0 0 0 4px rgba(20, 184, 166, 0.12);
}

.post-toc a:hover {
  color: var(--lz-accent);
  background: rgba(20, 184, 166, 0.1);
}

.post-toc a:focus-visible {
  outline: 2px solid rgba(20, 184, 166, 0.45);
  outline-offset: 2px;
}

.post .post-step-title {
  margin: 1.55em 0 0.75em;
  padding: 0;
  background: transparent;
  border-left: 0;
  box-shadow: none;
  color: #172033;
  font-size: 1.12rem;
  font-weight: 700;
  line-height: 1.45;
}

body.dark-mode .post-description,
body.dark-mode .post-toc {
  border-color: var(--lz-border);
  color: var(--lz-text);
}

body.dark-mode .post-description {
  background: var(--lz-surface-raised);
}

body.dark-mode .post-toc {
  background:
    linear-gradient(135deg, rgba(23, 32, 51, 0.98) 0%, rgba(11, 24, 39, 0.96) 100%),
    var(--lz-surface-raised);
  border-color: rgba(148, 163, 184, 0.26);
  box-shadow: var(--lz-shadow);
}

body.dark-mode .post-toc__title::after {
  background: linear-gradient(90deg, rgba(94, 234, 212, 0.28), rgba(96, 165, 250, 0));
}

body.dark-mode .post-toc > ul > li,
body.dark-mode .post-toc > ol > li {
  background: rgba(15, 23, 42, 0.26);
  border-color: rgba(148, 163, 184, 0.12);
}

body.dark-mode .post-toc li ul,
body.dark-mode .post-toc li ol {
  border-left-color: rgba(94, 234, 212, 0.24);
}

body.dark-mode .post blockquote {
  background: var(--lz-quote-bg);
  border-left-color: var(--lz-accent);
  color: var(--lz-text);
}

body.dark-mode .post h3 {
  background: transparent;
  border-left: 0;
  box-shadow: none;
}

body.dark-mode .post code {
  background: var(--lz-code-inline-bg);
  border-color: var(--lz-code-border);
  color: var(--lz-code-text);
}

body.dark-mode .post pre {
  background: var(--lz-code-bg);
  border-color: var(--lz-border);
}

body.dark-mode .post pre code,
body.dark-mode .post pre .hljs {
  background: transparent;
  border: 0;
}

body.dark-mode .post-toc a {
  color: var(--lz-text);
}

body.dark-mode .post-toc a::before {
  background: rgba(94, 234, 212, 0.52);
  box-shadow: 0 0 0 3px rgba(94, 234, 212, 0.08);
}

body.dark-mode .post-toc > ul > li > a,
body.dark-mode .post-toc > ol > li > a {
  background: rgba(15, 23, 42, 0.42);
  border-color: rgba(148, 163, 184, 0.18);
  color: var(--lz-heading);
}

body.dark-mode .post-toc > ul > li > a::before,
body.dark-mode .post-toc > ol > li > a::before {
  background: #5eead4;
  box-shadow: 0 0 0 4px rgba(94, 234, 212, 0.12);
}

body.dark-mode .post-toc a:hover {
  color: var(--lz-accent);
  background: rgba(45, 212, 191, 0.12);
}

body.dark-mode .post-pager__item {
  background: linear-gradient(180deg, var(--lz-surface-raised) 0%, #121b2c 100%);
  border-color: rgba(148, 163, 184, 0.24);
  box-shadow: var(--lz-shadow);
  color: var(--lz-heading);
}

body.dark-mode .post-pager__label {
  color: var(--lz-accent);
}

body.dark-mode .post-pager__title {
  color: var(--lz-heading);
}

body.dark-mode .post-pager__item:hover {
  background: linear-gradient(180deg, #1b283c 0%, #162236 100%);
  border-color: rgba(45, 212, 191, 0.36);
  color: var(--lz-heading);
}

.post mjx-container[display="true"] {
  box-sizing: border-box;
  padding: 0.65em 0.8em;
  background: #f8fafc;
  border: 1px solid var(--lz-border);
  border-radius: 8px;
}

body.dark-mode .post strong,
body.dark-mode .post b,
body.dark-mode .post-description strong,
body.dark-mode .post-toc strong {
  color: var(--lz-heading);
}

body.dark-mode .post em,
body.dark-mode .post i {
  color: #e5e7eb;
}

body.dark-mode .post a {
  color: var(--lz-link);
}

body.dark-mode .post a:hover {
  color: var(--lz-accent);
}

body.dark-mode .post th,
body.dark-mode .post td {
  border-color: var(--lz-border);
  color: var(--lz-text);
}

body.dark-mode .post thead tr:first-child,
body.dark-mode .post thead th {
  background: #20332f;
  color: var(--lz-heading);
}

body.dark-mode .post tbody tr:nth-child(even) {
  background: var(--lz-surface-soft);
}

body.dark-mode .post mjx-container {
  color: var(--lz-heading);
}

body.dark-mode .post mjx-container[display="true"] {
  background: var(--lz-code-bg);
  border-color: var(--lz-border);
}

/* Final dark-mode readability pass for older posts. Keep this late so legacy
   heading, emphasis, and inline color rules cannot make text unreadable. */
body.dark-mode .post {
  color: var(--lz-text);
}

body.dark-mode .post p,
body.dark-mode .post li,
body.dark-mode .post dd,
body.dark-mode .post dt,
body.dark-mode .post figcaption {
  color: var(--lz-text) !important;
}

body.dark-mode .post h1,
body.dark-mode .post h2,
body.dark-mode .post h3,
body.dark-mode .post h4,
body.dark-mode .post h5,
body.dark-mode .post h6,
body.dark-mode .post .post-step-title {
  color: var(--lz-heading) !important;
}

body.dark-mode .post strong,
body.dark-mode .post b {
  color: var(--lz-heading) !important;
}

body.dark-mode .post em,
body.dark-mode .post i,
body.dark-mode .post small {
  color: var(--lz-text) !important;
}

body.dark-mode .post mark {
  background: rgba(251, 191, 36, 0.22);
  color: #fef3c7 !important;
}

body.dark-mode .post p[style*="color"],
body.dark-mode .post li[style*="color"],
body.dark-mode .post blockquote[style*="color"],
body.dark-mode .post table[style*="color"],
body.dark-mode .post p [style*="color"],
body.dark-mode .post li [style*="color"],
body.dark-mode .post blockquote [style*="color"],
body.dark-mode .post table [style*="color"],
body.dark-mode .post font[color] {
  color: var(--lz-text) !important;
}

body.dark-mode .post hr {
  border-color: var(--lz-border-strong);
}

body.dark-mode .post blockquote strong,
body.dark-mode .post table strong,
body.dark-mode .post li strong {
  color: var(--lz-heading) !important;
}

@media all and (max-width: 620px) {
  .post {
    font-size: 1rem;
    line-height: 1.72;
  }

  .post h2 {
    margin-top: 1.75em;
    font-size: 1.38rem;
  }

  .post th,
  .post td {
    min-width: 0;
    overflow-wrap: anywhere;
  }

  .post-toc {
    margin-bottom: 28px;
    padding: 19px 16px 17px;
    border-radius: 14px;
  }

  .post-toc > ul,
  .post-toc > ol {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .post-toc a {
    padding: 6px 8px;
  }

  .post-pager {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .post-pager__item,
  .post-pager__item--next {
    grid-column: 1;
    align-items: flex-start;
    text-align: left;
  }
}

@media (prefers-reduced-motion: reduce) {
  .post-toc,
  .post-pager__item {
    transition: none;
  }

  .post-pager__item:hover {
    transform: none;
  }
}