/* =========================================
   内容与页面样式 (Content & Pages) - 通用与首页
   ========================================= */

.site-main {
  flex: 1 0 auto;
  width: 100%;
  padding-top: 0;
}

/* --- 首页内容区块容器 --- */
.content-section {
  padding: 80px 0;
  background-color: var(--bg-body);
}

.content-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr); /* 默认两列 (公告 + 博客) */
  gap: 60px;
}

/* 首页栏目标题 */
.announcements-column h2,
.blog-column h2 {
  font-size: 1.8rem; /* 增大栏目标题 (原1.5rem) */
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 2px solid var(--border-default);
  color: var(--text-primary);
  display: flex;
  align-items: center;
}

/* 终端风格前缀 */
.announcements-column h2::before,
.blog-column h2::before {
  content: ">";
  margin-right: 10px;
  color: var(--color-primary);
  font-weight: 800;
  font-family: var(--font-mono);
}

/* --- 首页文章列表 (卡片式) --- */
.post-list {
  display: flex;
  flex-direction: column;
  gap: 20px; /* 增大间距 (原16px) */
}

.post-item {
  display: flex;
  flex-direction: column;
  padding: 24px; /* 增大内边距 (原20px) */
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  background-color: var(--bg-card);
  transition: all var(--duration-fast);
  position: relative;
  overflow: hidden;
}

.post-content-wrapper {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.post-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
  border-color: var(--color-primary);
}

.post-title {
  margin: 0 0 12px 0;
  font-size: 1.35rem; /* 增大文章标题 (原1.15rem) */
  font-weight: 600;
  line-height: 1.4;
}

.post-title a {
  color: var(--text-primary);
  text-decoration: none;
}

.post-item:hover .post-title a {
  color: var(--color-primary);
}

.post-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-family: var(--font-mono);
  font-size: 0.95rem; /* 增大元信息 (原0.85rem) */
  color: var(--text-secondary);
  margin-top: auto; /* Push meta to bottom */
  padding-top: 16px;
  border-top: 1px solid var(--border-muted);
}

.post-author {
  color: var(--text-primary);
  font-weight: 500;
}

.post-author::before {
  content: "@";
  color: var(--color-purple);
  margin-right: 2px;
}

.post-excerpt {
  font-size: 1.05rem; /* 增大摘要 (原0.95rem) */
  color: var(--text-secondary);
  line-height: 1.6;
  opacity: 0.9;
  margin-bottom: 16px;
  /* 限制行数 */
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* --- 响应式适配 (首页) --- */
@media (max-width: 768px) {
  .content-grid {
    grid-template-columns: 1fr; /* 单列显示 */
    gap: 40px;
  }
}

/* =========================================
   GitHub 风格博客
   ========================================= */

.single-post-gh-pro {
  padding-bottom: 4rem;
}

/* --- Pro Header (Clean Geek Style) --- */
.gh-pro-header {
  padding-bottom: 24px;
  margin-bottom: 24px;
  text-align: center; /* Center alignment looks more like a blog title */
}

.gh-pro-meta-top {
  margin-bottom: 16px;
}

.gh-label-category {
  display: inline-block;
  font-size: 14px; /* 增大标签 (原13px) */
  font-weight: 600;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.gh-pro-header .entry-title {
  font-size: 3rem; /* 增大文章主标题 (原2.5rem) */
  font-weight: 700;
  margin-bottom: 16px;
  line-height: 1.25;
}

.gh-pro-meta-bar {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 24px;
  font-size: 16px; /* 增大元信息栏 (原14px) */
  color: var(--text-secondary);
  font-family: var(--font-mono);
}

.gh-author-lockup {
  display: flex;
  align-items: center;
  gap: 8px;
}

.gh-author-lockup img {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 1px solid var(--border-muted);
}

.gh-author-lockup .author-name {
  font-weight: 600;
  color: var(--text-primary);
}

.meta-divider {
  color: var(--border-default);
}

/* --- File Box Body (The Article) --- */
.gh-pro-body-container {
  max-width: 900px; /* Slightly wider read area */
  margin: 0 auto 48px;
}

.gh-file-box {
  border: 1px solid var(--border-default);
  border-radius: 6px;
  background-color: var(--bg-card);
  overflow: hidden;
}

.gh-file-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 16px;
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-default);
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-secondary);
}

.gh-file-header .file-info {
  display: flex;
  align-items: center;
  gap: 8px;
}

.gh-file-header .octicon {
  fill: currentColor;
}

.gh-file-header strong {
  color: var(--text-primary);
  font-weight: 600;
}

.gh-file-content {
  padding: 32px 40px;
  background-color: var(--bg-card);
}

/* Entry Content Typography (Markdown Style) */
.gh-file-content {
  font-size: 18px; /* 增大正文基础字号 (原16px) */
  line-height: 1.8; /* 优化行高 */
  color: var(--text-primary);
  overflow-wrap: break-word; /* 自动换行 */
  word-wrap: break-word;
}

.gh-file-content p { margin-bottom: 1.5em; }
.gh-file-content h2 { border-bottom: 1px solid var(--border-muted); padding-bottom: 0.3em; margin-top: 1.5em; margin-bottom: 1em; }
.gh-file-content code { background-color: rgba(175, 184, 193, 0.2); padding: 0.2em 0.4em; border-radius: 6px; font-size: 85%; font-family: var(--font-mono); }
.gh-file-content pre { padding: 16px; overflow: auto; line-height: 1.45; background-color: var(--bg-surface); border-radius: 6px; }

.gh-file-footer {
  margin-top: 32px;
  padding-top: 16px;
  border-top: 1px solid var(--border-muted);
}

/* --- Comments Section (Pro Timeline) --- */
.gh-pro-comments {
  max-width: 900px;
  margin: 0 auto;
}

.timeline-header h3 {
  font-size: 1.25rem;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--border-default);
  padding-bottom: 8px;
}

/* Reuse existing gh-timeline styles from previous step but center align */
.gh-timeline {
  margin-top: 0;
  margin-left: 0; /* Clear previous offset */
}

/* Vertical Timeline Line - NEW FIX */
.gh-timeline::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 20px; /* Center of 40px avatar */
  width: 2px;
  background-color: var(--border-muted);
  z-index: 0;
  display: block; /* Ensure it is displayed */
}

/* Fix z-index for items so line is behind */
.gh-timeline-item {
  position: relative;
  z-index: 1;
}

ol.comment-list {
  list-style: none; /* 去掉列表默认样式 */
  padding: 0;
  margin: 0;
}

/* Timeline Item (Main Post & Comments) */
.gh-timeline-item,
.gh-comment-item {
  display: flex;
  gap: 16px;
  margin-bottom: 24px;
  position: relative;
  z-index: 1;
}

/* Avatar Column */
.gh-avatar,
.gh-comment-avatar {
  flex-shrink: 0;
  width: 40px;
}

.gh-avatar img,
.gh-comment-avatar img {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--border-muted);
}

/* Content Box (Speech Bubble) */
.gh-item-box,
.gh-comment-box {
  flex-grow: 1;
  min-width: 0;
  border: 1px solid var(--border-default);
  border-radius: 6px;
  background-color: var(--bg-card);
  position: relative;
}

/* Speech Bubble Beak (Arrow) - Desktop Only */
@media (min-width: 768px) {
  .gh-item-box::before, .gh-item-box::after,
  .gh-comment-box::before, .gh-comment-box::after {
    content: " ";
    position: absolute;
    top: 11px;
    right: 100%;
    height: 0;
    width: 0;
    border: solid transparent;
    pointer-events: none;
  }

  .gh-item-box::after,
  .gh-comment-box::after {
    border-right-color: var(--bg-surface); /* Header BG color */
    border-width: 7px;
    margin-top: -7px;
  }

  .gh-item-box::before,
  .gh-comment-box::before {
    border-right-color: var(--border-default);
    border-width: 8px;
    margin-top: -8px;
  }
}

/* Box Header */
.gh-box-header,
.gh-comment-header {
  padding: 8px 16px;
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-default);
  border-top-left-radius: 6px;
  border-top-right-radius: 6px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 14px;
  color: var(--text-secondary);
}

.gh-header-meta {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: wrap;
}

.gh-comment-meta,
.gh-header-meta {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: wrap;
}

.gh-header-meta strong,
.gh-author-name a {
  color: var(--text-primary);
  font-weight: 600;
  text-decoration: none;
}

.gh-header-meta a,
.gh-comment-meta time,
.gh-comment-meta a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.85rem;
}

.gh-header-meta a:hover,
.gh-comment-meta time:hover,
.gh-comment-meta a:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

/* Badge (Author/Member) */
.gh-badge {
  display: inline-block;
  padding: 2px 7px;
  font-size: 12px;
  font-weight: 500;
  line-height: 18px;
  border-radius: 2em;
  border: 1px solid var(--border-default);
  color: var(--text-secondary);
  margin-left: 8px;
}

/* Box Body */
.gh-box-body,
.gh-comment-body {
  padding: 16px;
  background-color: var(--bg-card);
  border-bottom-left-radius: 6px;
  border-bottom-right-radius: 6px;
  overflow-wrap: break-word;
}

.gh-box-body .entry-content,
.gh-comment-body {
  font-size: 15px;
  line-height: 1.6;
}

/* Comment Form Styles */
.gh-comment-form textarea {
  display: block;
  width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--border-default);
  border-radius: 6px;
  background-color: var(--bg-surface);
  color: var(--text-primary);
  font-family: inherit;
  resize: vertical;
  min-height: 100px;
}

.gh-comment-form textarea:focus {
  border-color: var(--color-primary);
  outline: none;
  box-shadow: 0 0 0 3px rgba(9, 105, 218, 0.3);
}

.form-submit {
  text-align: right;
  margin-top: 10px;
}

.gh-comment-form input[type="submit"] {
  background-color: var(--color-success);
  color: #fff;
  border: 1px solid rgba(27, 31, 36, 0.15);
  border-radius: 6px;
  padding: 5px 16px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}

.gh-comment-form input[type="submit"]:hover {
  background-color: #2c974b;
}

/* Buttons */
.btn-sm {
  font-size: 12px;
  padding: 3px 8px;
  border: 1px solid var(--border-default);
  border-radius: 6px;
  color: var(--text-secondary);
  background-color: var(--bg-body);
  font-weight: 500;
}
.btn-sm:hover {
  background-color: var(--bg-surface);
  color: var(--color-primary);
  text-decoration: none;
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .gh-file-content { padding: 20px; }
  .gh-pro-header .entry-title { font-size: 1.75rem; }
}