/* ============================================================
   blog.css — 博客板块
   视觉沿用本站 theme.css 的浅色 + 橙色主题，结构约定与
   download.css 保持一致（页面级前缀 bl-，断点 1024 / 768 / 420）。
   依赖 theme.css 提供的变量：--vcc-accent / --vcc-ink / --vcc-ink-2
   / --vcc-muted / --vcc-line
   ============================================================ */

.bl-body {
  background: #f5f7fb;
}

.bl-wrap {
  max-width: 1200px;
  margin: 0 auto;
  padding: 48px 20px 64px;
}

/* 内容不足一屏时，把页脚压到视口底部（与下载中心同一套做法） */
.bl-body .page {
  display: flex;
  flex-direction: column;
  min-height: calc(100vh - 72px); /* 减去固定导航高度 */
}
.bl-body .bl-wrap {
  flex: 1 0 auto;
}

/* ---------- 页头 ---------- */
.bl-hero {
  margin-bottom: 30px;
}
.bl-hero h1 {
  font-size: 30px;
  font-weight: 700;
  color: var(--vcc-ink);
  margin-bottom: 8px;
}
.bl-hero p {
  font-size: 15px;
  color: var(--vcc-ink-2);
}
.bl-rss {
  display: inline-block;
  margin-top: 14px;
  padding: 5px 12px;
  font-size: 13px;
  color: var(--vcc-accent);
  border: 1px solid #ffd9c2;
  border-radius: 999px;
  background: #fff;
  transition: background 0.2s, color 0.2s;
}
.bl-rss:hover {
  background: var(--vcc-accent);
  color: #fff;
}

.bl-crumb {
  margin-bottom: 12px;
  font-size: 13px;
  color: var(--vcc-muted);
}
.bl-crumb a {
  color: var(--vcc-ink-2);
}
.bl-crumb a:hover {
  color: var(--vcc-accent);
}
.bl-crumb span {
  margin: 0 6px;
}
.bl-crumb span:last-child {
  margin: 0;
}

/* ---------- 文章列表 ---------- */
.bl-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.bl-card {
  background: #fff;
  border: 1px solid transparent;
  border-radius: 16px;
  box-shadow: 0 6px 28px rgba(31, 36, 48, 0.07);
  padding: 22px 26px;
  margin-bottom: 18px;
  transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
}
.bl-card:hover {
  transform: translateY(-2px);
  border-color: #ffd9c2;
  box-shadow: 0 10px 30px rgba(255, 111, 40, 0.14);
}

.bl-card-title {
  font-size: 19px;
  font-weight: 700;
  color: var(--vcc-ink);
  line-height: 1.45;
  transition: color 0.2s;
}
.bl-card:hover .bl-card-title {
  color: var(--vcc-accent);
}

.bl-card-desc {
  margin-top: 8px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--vcc-ink-2);
}

.bl-card-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-top: 14px;
  font-size: 12px;
  color: var(--vcc-muted);
}
.bl-dot {
  color: var(--vcc-line);
}
.bl-card-tags {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-left: 4px;
}

.bl-tag {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 10px;
  font-size: 12px;
  color: var(--vcc-ink-2);
  background: #f2f5fa;
  border-radius: 999px;
  transition: background 0.2s, color 0.2s;
}
.bl-tag:hover {
  background: var(--vcc-accent);
  color: #fff;
}
.bl-tag-cnt {
  font-size: 11px;
  color: var(--vcc-muted);
}
.bl-tag:hover .bl-tag-cnt {
  color: rgba(255, 255, 255, 0.75);
}

.bl-empty {
  padding: 60px 0;
  text-align: center;
  color: var(--vcc-muted);
}

/* ---------- 标签云 ---------- */
.bl-tagcloud {
  margin-top: 36px;
  padding-top: 24px;
  border-top: 1px solid var(--vcc-line);
}
.bl-tagcloud-hd {
  font-size: 14px;
  font-weight: 600;
  color: var(--vcc-ink-2);
  margin-bottom: 14px;
}
.bl-tagcloud-bd {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 分页 ---------- */
.bl-pager {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-top: 30px;
}
.bl-pager-btn {
  padding: 8px 18px;
  font-size: 14px;
  color: var(--vcc-ink);
  background: #fff;
  border: 1px solid var(--vcc-line);
  border-radius: 999px;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
}
.bl-pager-btn:hover {
  color: #fff;
  background: var(--vcc-accent);
  border-color: var(--vcc-accent);
}
.bl-pager-btn.is-disabled {
  color: var(--vcc-muted);
  background: #f2f5fa;
  cursor: not-allowed;
}
.bl-pager-btn.is-disabled:hover {
  color: var(--vcc-muted);
  background: #f2f5fa;
  border-color: var(--vcc-line);
}
.bl-pager-num {
  font-size: 13px;
  color: var(--vcc-ink-2);
}

/* ---------- 文章页 ---------- */
.bl-wrap--post {
  max-width: 1120px;
}

.bl-post {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 240px;
  grid-template-areas:
    "hd   hd"
    "bd   toc"
    "nav  nav"
    "back back";
  gap: 0 40px;
}
.bl-post-hd  { grid-area: hd; }
.bl-post-bd  { grid-area: bd; }
.bl-toc      { grid-area: toc; }
.bl-post-nav { grid-area: nav; }
.bl-back     { grid-area: back; }

.bl-post-title {
  font-size: 30px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--vcc-ink);
}
.bl-post-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-top: 12px;
  font-size: 13px;
  color: var(--vcc-muted);
}
.bl-post-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

/* 目录：宽屏在右侧粘性显示，窄屏折到正文上方 */
.bl-toc {
  align-self: start;
  position: sticky;
  top: 92px; /* 固定导航 72px + 20px 呼吸 */
  margin-top: 26px;
  padding: 16px 18px;
  background: #fff;
  border-radius: 14px;
  box-shadow: 0 6px 28px rgba(31, 36, 48, 0.07);
  max-height: calc(100vh - 120px);
  overflow-y: auto;
}
.bl-toc-hd {
  font-size: 13px;
  font-weight: 700;
  color: var(--vcc-ink);
  margin-bottom: 8px;
}
.bl-toc ul {
  list-style: none;
  margin: 0;
  padding-left: 0;
}
.bl-toc ul ul {
  padding-left: 12px;
}
.bl-toc li {
  margin: 6px 0;
  font-size: 13px;
  line-height: 1.6;
}
.bl-toc a {
  color: var(--vcc-ink-2);
}
.bl-toc a:hover {
  color: var(--vcc-accent);
}

/* 正文卡片 */
.bl-post-bd {
  margin-top: 26px;
  padding: 32px 36px 40px;
  background: #fff;
  border-radius: 16px;
  box-shadow: 0 6px 28px rgba(31, 36, 48, 0.07);
  font-size: 15px;
  line-height: 1.9;
  color: #3a4150;
}

.bl-post-bd h2,
.bl-post-bd h3,
.bl-post-bd h4 {
  color: var(--vcc-ink);
  line-height: 1.5;
  scroll-margin-top: 92px; /* 锚点跳转不被固定导航遮住 */
}
.bl-post-bd h2 {
  position: relative;
  margin: 34px 0 14px;
  padding-left: 12px;
  font-size: 21px;
}
.bl-post-bd h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  bottom: 6px;
  width: 3px;
  border-radius: 2px;
  background: var(--vcc-accent);
}
.bl-post-bd h3 {
  margin: 26px 0 10px;
  font-size: 17px;
}
.bl-post-bd h4 {
  margin: 20px 0 8px;
  font-size: 15px;
}
.bl-post-bd > *:first-child {
  margin-top: 0;
}

.bl-post-bd p {
  margin: 14px 0;
}
.bl-post-bd a {
  color: var(--vcc-accent);
  border-bottom: 1px solid rgba(255, 111, 40, 0.35);
  word-break: break-word;
}
.bl-post-bd a:hover {
  border-bottom-color: var(--vcc-accent);
}

.bl-post-bd ul,
.bl-post-bd ol {
  margin: 14px 0;
  padding-left: 24px;
}
.bl-post-bd li {
  margin: 6px 0;
}
.bl-post-bd li > ul,
.bl-post-bd li > ol {
  margin: 6px 0;
}

.bl-post-bd blockquote {
  margin: 18px 0;
  padding: 12px 18px;
  color: var(--vcc-ink-2);
  background: #f7f9fc;
  border-left: 3px solid var(--vcc-accent);
  border-radius: 0 10px 10px 0;
}
.bl-post-bd blockquote p {
  margin: 6px 0;
}

.bl-post-bd img {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 20px auto;
  border-radius: 12px;
  box-shadow: 0 6px 22px rgba(31, 36, 48, 0.1);
}

.bl-post-bd hr {
  margin: 28px 0;
  border: 0;
  border-top: 1px solid var(--vcc-line);
}

/* 表格：窄屏横向滚动，不撑破布局 */
.bl-post-bd table {
  width: 100%;
  margin: 18px 0;
  border-collapse: collapse;
  font-size: 14px;
  display: block;
  overflow-x: auto;
}
.bl-post-bd th,
.bl-post-bd td {
  padding: 9px 14px;
  border: 1px solid var(--vcc-line);
  text-align: left;
  white-space: nowrap;
}
.bl-post-bd th {
  background: #f7f9fc;
  color: var(--vcc-ink);
  font-weight: 600;
}

/* 代码：行内 + 代码块（配色由 syntax.css 提供） */
.bl-post-bd code {
  padding: 2px 6px;
  font-family: Consolas, Menlo, "Courier New", monospace;
  font-size: 13px;
  color: #d1483c;
  background: #f4f6fa;
  border-radius: 5px;
}
.bl-post-bd pre {
  margin: 18px 0;
  padding: 16px 18px;
  overflow-x: auto;
  background: #f7f9fc;
  border: 1px solid var(--vcc-line);
  border-radius: 12px;
  line-height: 1.7;
}
.bl-post-bd pre code {
  padding: 0;
  color: inherit;
  background: none;
  font-size: 13px;
}
.bl-post-bd .highlight {
  margin: 18px 0;
}
.bl-post-bd .highlight pre {
  margin: 0;
}

/* 上一篇 / 下一篇 */
.bl-post-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 26px;
}
.bl-post-nav-item {
  flex: 1 1 240px;
  min-width: 0;
  padding: 14px 18px;
  background: #fff;
  border: 1px solid var(--vcc-line);
  border-radius: 12px;
  font-size: 14px;
  color: var(--vcc-ink);
  transition: border-color 0.2s, box-shadow 0.2s, color 0.2s;
}
.bl-post-nav-item span {
  display: block;
  margin-bottom: 4px;
  font-size: 12px;
  color: var(--vcc-muted);
}
.bl-post-nav-item--next {
  text-align: right;
}
.bl-post-nav-item:hover {
  color: var(--vcc-accent);
  border-color: #ffd9c2;
  box-shadow: 0 8px 22px rgba(255, 111, 40, 0.14);
}

.bl-back {
  display: inline-block;
  margin-top: 24px;
  font-size: 14px;
  color: var(--vcc-ink-2);
}
.bl-back:hover {
  color: var(--vcc-accent);
}

/* ---------- 响应式 ---------- */
@media screen and (max-width: 1024px) {
  .bl-post {
    grid-template-columns: minmax(0, 1fr);
    grid-template-areas:
      "hd"
      "toc"
      "bd"
      "nav"
      "back";
  }
  .bl-toc {
    position: static;
    max-height: none;
  }
}

@media screen and (max-width: 768px) {
  .bl-wrap { padding: 28px 16px 40px; }
  .bl-body .page { min-height: calc(100vh - 56px); } /* 小屏导航变矮 */
  .bl-hero h1 { font-size: 24px; }
  .bl-card { padding: 18px 18px; border-radius: 14px; }
  .bl-card-title { font-size: 17px; }
  .bl-post-title { font-size: 23px; }
  .bl-post-bd {
    padding: 22px 18px 28px;
    border-radius: 14px;
  }
  .bl-post-bd h2 { font-size: 19px; }
  .bl-post-bd h3 { font-size: 16px; }
  .bl-post-nav-item { flex: 1 1 100%; text-align: left; }
}

@media screen and (max-width: 420px) {
  .bl-pager { gap: 10px; }
  .bl-pager-btn { padding: 7px 14px; }
}