/* ==========================================================================
   文章详情页样式 article.css
   说明：文章头部、正文渲染、代码块、TOC目录、赞赏、相关文章等
   ========================================================================== */

/* ---------- 文章主容器 ---------- */
.article-wrap {
  max-width: 820px;          /* 文章正文限制宽度，阅读舒适 */
  margin: 0 auto;
  padding: 30px 0;
}

/* ---------- 面包屑导航 ---------- */
.breadcrumb {
  font-size: 13px;
  color: var(--color-text-secondary);
  margin-bottom: 20px;
  padding: 8px 0;
}
.breadcrumb a {
  color: var(--color-text-secondary);
  text-decoration: none;
}
.breadcrumb a:hover {
  color: var(--color-primary);
}
.breadcrumb .sep {
  margin: 0 6px;
  color: var(--color-text-light);
}
.breadcrumb .current {
  color: var(--color-text);
}

/* ---------- 阅读进度条（顶部） ---------- */
.read-progress {
  position: fixed;
  top: var(--header-height);
  left: 0;
  height: 3px;
  background: var(--color-primary);
  width: 0;
  z-index: 99;
  transition: width 0.1s;
}

/* ---------- 文章头部 ---------- */
.article-header {
  margin-bottom: 30px;
}
.article-header .category-tag {
  display: inline-block;
  padding: 2px 10px;
  font-size: 12px;
  color: var(--color-primary);
  background: var(--color-primary-light);
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
}
.article-header h1 {
  font-size: 30px;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.4;
  margin-bottom: 16px;
}
.article-header .meta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 13px;
  color: var(--color-text-light);
}
.article-header .meta span {
  display: flex;
  align-items: center;
  gap: 4px;
}

/* ---------- 封面图 ---------- */
.article-cover {
  width: 100%;
  height: 360px;
  object-fit: cover;
  border-radius: var(--radius);
  margin-bottom: 30px;
}

/* ---------- 专栏信息条 ---------- */
.column-info-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  margin-bottom: 30px;
  background: var(--color-primary-light);
  border-radius: var(--radius);
  border-left: 4px solid var(--color-primary);
  font-size: 14px;
  color: var(--color-text-secondary);
}
.column-info-bar a {
  font-weight: 500;
}

/* ---------- 正文内容 ---------- */
.article-content {
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-text);
}
.article-content h2 {
  font-size: 22px;
  font-weight: 600;
  margin: 36px 0 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border-light);
  position: relative;
}
.article-content h2::before {
  content: '';
  display: inline-block;
  width: 4px;
  height: 20px;
  background: var(--color-primary);
  border-radius: 2px;
  margin-right: 8px;
  vertical-align: -3px;
}
.article-content h3 {
  font-size: 18px;
  font-weight: 600;
  margin: 28px 0 12px;
}
.article-content p {
  margin-bottom: 16px;
}
.article-content a {
  color: var(--color-primary);
  border-bottom: 1px dashed var(--color-primary);
}
.article-content ul, .article-content ol {
  margin: 12px 0 16px;
  padding-left: 24px;
}
.article-content li {
  margin-bottom: 6px;
  list-style: disc;
}
.article-content blockquote {
  margin: 16px 0;
  padding: 12px 16px;
  background: var(--color-primary-light);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius-sm);
  color: var(--color-text-secondary);
}
.article-content img {
  border-radius: var(--radius);
  margin: 16px 0;
  cursor: zoom-in;
}
.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
  font-size: 14px;
}
.article-content th, .article-content td {
  border: 1px solid var(--color-border);
  padding: 8px 12px;
  text-align: left;
}
.article-content th {
  background: var(--color-primary-light);
  font-weight: 600;
}

/* ---------- 行内代码（排除代码块内的 code） ---------- */
.article-content p code,
.article-content li code,
.article-content td code {
  padding: 2px 6px;
  background: var(--color-bg-code);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.9em;
  color: var(--color-primary);
}

/* ---------- 代码块 ---------- */
.code-block {
  position: relative;
  margin: 16px 0;
  background: #1E293B;           /* 代码块深色背景（日间夜间统一） */
  border-radius: var(--radius);
  overflow: hidden;
}
.code-block .code-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 16px;
  background: rgba(255, 255, 255, 0.05);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}
.code-block .code-lang {
  font-size: 12px;
  color: #94A3B8;
  font-family: var(--font-mono);
}
.code-block .copy-btn {
  border: none;
  background: transparent;
  color: #94A3B8;
  font-size: 12px;
  cursor: pointer;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  transition: all 0.2s;
}
.code-block .copy-btn:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.1);
}
.code-block pre {
  margin: 0;
  padding: 16px;
  overflow-x: auto;
}
.code-block pre code {
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1;
  color: #E2E8F0;
  background: transparent;          /* 覆盖行内代码的背景色 */
  padding: 0;                       /* 覆盖行内代码的内边距 */
  white-space: pre;
  display: block;                   /* 让 code 占满 pre 宽度 */
}
/* 代码行 + 行号（行内排列，绝对对齐） */
.code-block .code-line {
  display: block;                   /* 每行独占一行 */
  white-space: pre;                 /* 保留行内空格 */
}
.code-block .line-num {
  display: inline-block;
  width: 2.5em;                     /* 固定宽度，行号右对齐 */
  margin-right: 12px;
  text-align: right;
  color: #475569;
  user-select: none;                /* 行号不可选中，复制不带行号 */
  -webkit-user-select: none;
}
.code-block .line-code {
  display: inline;                  /* 代码部分正常内联 */
}

/* 简易语法高亮（用 span 包裹关键词） */
.tk-keyword { color: #C084FC; }    /* 关键字：紫 */
.tk-string { color: #86EFAC; }     /* 字符串：绿 */
.tk-comment { color: #64748B; }    /* 注释：灰 */
.tk-function { color: #93C5FD; }   /* 函数：蓝 */
.tk-variable { color: #FBBF24; }   /* 变量：黄 */

/* ---------- 右侧悬浮 TOC 目录 ---------- */
.toc {
  position: fixed;
  top: 100px;
  right: 30px;
  width: 240px;
  max-height: 60vh;
  overflow-y: auto;
  padding: 16px;
  background: var(--color-bg-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
}
.toc .toc-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border-light);
}
.toc ul li {
  padding: 6px 0;
}
.toc ul li a {
  font-size: 13px;
  color: var(--color-text-secondary);
  display: block;
  padding-left: 12px;
  border-left: 2px solid transparent;
  transition: all 0.2s;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.toc ul li a:hover {
  color: var(--color-primary);
}
.toc ul li a.active {
  color: var(--color-primary);
  border-left-color: var(--color-primary);
  font-weight: 500;
}
/* h3 缩进 */
.toc ul li.h3 a {
  padding-left: 24px;
  font-size: 12px;
}

/* ---------- 文章标签 ---------- */
.article-tags {
  margin: 30px 0;
  padding-top: 20px;
  border-top: 1px solid var(--color-border-light);
}
.article-tags .label {
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-right: 8px;
}
.article-tags .tag {
  margin-right: 8px;
}

/* ---------- 版权声明 ---------- */
.copyright-notice {
  margin: 20px 0;
  padding: 16px;
  background: var(--color-primary-light);
  border-radius: var(--radius);
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.8;
}
.copyright-notice strong {
  color: var(--color-text);
}

/* ---------- 赞赏入口 ---------- */
.support-section {
  text-align: center;
  margin: 30px 0;
  padding: 24px;
  background: var(--color-bg-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
}
.support-section .support-text {
  font-size: 15px;
  color: var(--color-text-secondary);
  margin-bottom: 16px;
}
.support-btn {
  padding: 10px 28px;
  font-size: 15px;
  color: #fff;
  background: var(--color-primary);
  border: none;
  border-radius: 24px;
  cursor: pointer;
  transition: all 0.2s;
}
.support-btn:hover {
  background: var(--color-primary-hover);
  transform: translateY(-1px);
}

/* ---------- 赞赏弹层 ---------- */
.support-modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s;
}
.support-modal.show {
  opacity: 1;
  visibility: visible;
}
.support-modal .modal-box {
  width: 360px;
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  padding: 30px;
  text-align: center;
  transform: translateY(20px);
  transition: transform 0.3s;
}
.support-modal.show .modal-box {
  transform: translateY(0);
}
.support-modal .modal-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
}
.support-modal .modal-desc {
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-bottom: 20px;
}
/* 二维码 Tab */
.qr-tabs {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 16px;
}
.qr-tab {
  padding: 6px 16px;
  border: 1px solid var(--color-border);
  background: transparent;
  color: var(--color-text-secondary);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 13px;
  transition: all 0.2s;
}
.qr-tab.active {
  color: #fff;
  background: var(--color-primary);
  border-color: var(--color-primary);
}
.qr-image {
  width: 220px;
  height: 220px;
  margin: 0 auto 12px;
  border-radius: var(--radius);
  object-fit: cover;
}
.modal-thanks {
  font-size: 13px;
  color: var(--color-text-light);
  margin-top: 12px;
}
.modal-close {
  display: block;
  margin: 16px auto 0;
  border: none;
  background: transparent;
  color: var(--color-text-light);
  font-size: 14px;
  cursor: pointer;
}
.modal-close:hover {
  color: var(--color-primary);
}

/* ---------- 上下篇导航 ---------- */
.post-nav {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  margin: 30px 0;
}
.post-nav a {
  flex: 1;
  padding: 16px;
  background: var(--color-bg-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  transition: all 0.2s;
}
.post-nav a:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}
.post-nav .nav-label {
  font-size: 12px;
  color: var(--color-text-light);
  margin-bottom: 4px;
}
.post-nav .nav-title {
  font-size: 14px;
  color: var(--color-text);
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.post-nav .next {
  text-align: right;
}

/* ---------- 相关文章推荐 ---------- */
.related-posts {
  margin: 30px 0;
}
.related-posts .section-title {
  font-size: 18px;
}
.related-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.related-card {
  padding: 14px;
  background: var(--color-bg-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  cursor: pointer;
  transition: all 0.2s;
}
.related-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}
.related-card .title {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: 6px;
  /* 两行省略 */
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.related-card .meta {
  font-size: 12px;
  color: var(--color-text-light);
}

/* ---------- 响应式 ---------- */
@media (max-width: 1280px) {
  .toc { display: none; }    /* 窄屏隐藏悬浮目录 */
}
@media (max-width: 768px) {
  .article-header h1 { font-size: 22px; }
  .article-cover { height: 200px; }
  .article-content { font-size: 15px; }
  .post-nav { flex-direction: column; }
  .post-nav .next { text-align: left; }
  .related-list { grid-template-columns: 1fr; }
  .support-modal .modal-box { width: 90%; padding: 20px; }
  .qr-image { width: 180px; height: 180px; }
}