/* ==========================================================================
   OctoBlog — GitHub 风格个人博客主题
   配色参考 GitHub Primer（light / dark），字体使用系统栈 + 中文回退。
   ========================================================================== */

/* ---------- 1. 设计变量 ---------- */
:root,
[data-theme='light'] {
  --canvas-default: #ffffff;
  --canvas-subtle: #f6f8fa;
  --canvas-inset: #f6f8fa;
  --canvas-overlay: #ffffff;
  --border-default: #d1d9e0;
  --border-muted: #e4e8ed;
  --fg-default: #1f2328;
  --fg-muted: #59636e;
  --fg-subtle: #818b98;
  --fg-on-emphasis: #ffffff;
  --accent-fg: #0969da;
  --accent-emphasis: #0969da;
  --accent-subtle: #ddf4ff;
  --accent-muted: rgba(84, 174, 255, 0.4);
  --success-fg: #1a7f37;
  --success-subtle: #dafbe1;
  --danger-fg: #d1242f;
  --done-fg: #8250df;
  --attention-fg: #9a6700;
  --neutral-emphasis: #6e7781;
  --shadow-small: 0 1px 0 rgba(31, 35, 40, 0.04);
  --shadow-medium: 0 3px 6px rgba(140, 149, 159, 0.15);
  --shadow-large: 0 8px 24px rgba(140, 149, 159, 0.2);
  --btn-bg: #f6f8fa;
  --btn-hover: #eef1f4;
  --btn-active: #e8ebef;
  --btn-border: rgba(31, 35, 40, 0.15);
  --topbar: #24292f;
  --topbar-2: #1f2328;
  --topbar-border: #3d444d;
  --topbar-fg: #f0f3f6;
  --topbar-input: #32383f;
  --topbar-input-border: #474e57;
  --graph-0: #eff2f5;
  --graph-1: #aceebb;
  --graph-2: #4ac26b;
  --graph-3: #2da44e;
  --graph-4: #116329;
  --code-bg: #f6f8fa;
  --code-head: #eef1f4;
  --code-border: #d1d9e0;
  --tok-comment: #59636e;
  --tok-string: #0a3069;
  --tok-keyword: #cf222e;
  --tok-number: #0550ae;
  --tok-func: #8250df;
  --tok-literal: #0550ae;
  --tok-op: #59636e;
  --tok-tag: #116329;
  --tok-attr: #0550ae;
  --selection: #b6ddff;
}

[data-theme='dark'] {
  --canvas-default: #0d1117;
  --canvas-subtle: #151b23;
  --canvas-inset: #010409;
  --canvas-overlay: #151b23;
  --border-default: #3d444d;
  --border-muted: #2f3742;
  --fg-default: #f0f6fc;
  --fg-muted: #9198a1;
  --fg-subtle: #6e7681;
  --accent-fg: #4493f8;
  --accent-emphasis: #1f6feb;
  --accent-subtle: rgba(56, 139, 253, 0.15);
  --accent-muted: rgba(56, 139, 253, 0.4);
  --success-fg: #3fb950;
  --success-subtle: rgba(46, 160, 67, 0.15);
  --danger-fg: #f85149;
  --done-fg: #ab7df8;
  --attention-fg: #d29922;
  --shadow-small: 0 0 transparent;
  --shadow-medium: 0 3px 6px #01040999;
  --shadow-large: 0 8px 24px #010409b3;
  --btn-bg: #212830;
  --btn-hover: #262c36;
  --btn-active: #2a313c;
  --btn-border: #3d444d;
  --topbar: #010409;
  --topbar-2: #010409;
  --topbar-border: #3d444d;
  --topbar-fg: #f0f6fc;
  --topbar-input: #0d1117;
  --topbar-input-border: #3d444d;
  --graph-0: #151b23;
  --graph-1: #033a16;
  --graph-2: #196c2e;
  --graph-3: #2ea043;
  --graph-4: #56d364;
  --code-bg: #151b23;
  --code-head: #1c2128;
  --code-border: #3d444d;
  --tok-comment: #9198a1;
  --tok-string: #a5d6ff;
  --tok-keyword: #ff7b72;
  --tok-number: #79c0ff;
  --tok-func: #d2a8ff;
  --tok-literal: #79c0ff;
  --tok-op: #c9d1d9;
  --tok-tag: #7ee787;
  --tok-attr: #79c0ff;
  --selection: rgba(56, 139, 253, 0.4);
}

/* ---------- 2. 基础 ---------- */
*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--canvas-default);
  color: var(--fg-default);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', Helvetica, Arial, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji';
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

@media (prefers-reduced-motion: no-preference) {
  body { transition: background-color 0.2s ease, color 0.2s ease; }
}

img { max-width: 100%; height: auto; }
[hidden] { display: none !important; }
a { color: var(--accent-fg); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3, h4 { margin: 0; font-weight: 600; line-height: 1.3; }
p { margin: 0; }
ul, ol { margin: 0; padding: 0; }
dl, dd { margin: 0; }
kbd {
  font-family: ui-monospace, SFMono-Regular, 'SF Mono', Menlo, Consolas, 'Liberation Mono', monospace;
  font-size: 11px; line-height: 1.6;
  padding: 0 5px; border-radius: 6px;
  border: 1px solid var(--border-default);
  background: var(--canvas-subtle);
  color: var(--fg-muted);
  box-shadow: var(--shadow-small);
}
::selection { background: var(--selection); }

:focus-visible { outline: 2px solid var(--accent-emphasis); outline-offset: 2px; border-radius: 4px; }

.icon { flex: none; vertical-align: text-bottom; }
.muted { color: var(--fg-muted); }
.hidden { display: none !important; }

.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 100;
  background: var(--accent-emphasis); color: #fff; padding: 8px 14px; border-radius: 0 0 6px 0;
}
.skip-link:focus { left: 0; }

/* 阅读进度条 */
.reading-progress {
  position: fixed; inset: 0 0 auto 0; height: 2px; z-index: 60; background: transparent;
}
.reading-progress span {
  display: block; height: 100%; width: 0;
  background: linear-gradient(90deg, var(--accent-emphasis), var(--done-fg));
}

/* ---------- 3. 布局 ---------- */
.container { width: 100%; max-width: 1216px; margin: 0 auto; padding: 0 24px; }

.layout {
  display: grid;
  grid-template-columns: 296px minmax(0, 1fr);
  gap: 32px;
  align-items: start;
  padding-top: 32px;
  padding-bottom: 72px;
}

.main { min-width: 0; }

/* ---------- 4. 顶栏 ---------- */
.topbar {
  position: sticky; top: 0; z-index: 50;
  background: var(--topbar);
  color: var(--topbar-fg);
  border-bottom: 1px solid var(--topbar-border);
  backdrop-filter: saturate(180%) blur(8px);
}
.topbar-inner {
  display: flex; align-items: center; gap: 16px;
  max-width: 1216px; margin: 0 auto; padding: 12px 24px; min-height: 62px;
}
.brand { display: flex; align-items: center; gap: 10px; color: var(--topbar-fg); }
.brand:hover { text-decoration: none; opacity: 0.85; }
.brand-mark {
  display: grid; place-items: center; width: 32px; height: 32px; border-radius: 50%;
  background: linear-gradient(140deg, #2f81f7, #8250df); color: #fff;
}
.brand-text { display: flex; flex-direction: column; line-height: 1.2; }
.brand-text b { font-size: 14px; font-weight: 600; }
.brand-text i { font-size: 11px; font-style: normal; color: #8c959f; }

.search-trigger {
  display: flex; align-items: center; gap: 8px;
  flex: 0 1 320px; min-width: 0;
  padding: 5px 8px 5px 10px; border-radius: 6px;
  background: var(--topbar-input); color: #8c959f;
  border: 1px solid var(--topbar-input-border);
  font: inherit; font-size: 13px; cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease;
}
.search-trigger:hover { border-color: #6e7681; color: #e6edf3; }
.search-trigger-text { flex: 1; text-align: left; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.search-kbd {
  display: flex; gap: 2px; border: 1px solid var(--topbar-input-border); border-radius: 5px;
  padding: 0 5px; font-size: 11px; color: #8c959f; background: transparent; box-shadow: none;
}

.topnav { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.topnav-link {
  padding: 6px 10px; border-radius: 6px; color: var(--topbar-fg);
  font-size: 13px; font-weight: 500; white-space: nowrap;
}
.topnav-link:hover { background: hsla(0, 0%, 100%, 0.12); text-decoration: none; }
.topnav-link.is-active { font-weight: 600; background: hsla(0, 0%, 100%, 0.1); }

.topbar-actions { display: flex; align-items: center; gap: 8px; }
.icon-btn {
  display: grid; place-items: center; width: 32px; height: 32px;
  border-radius: 6px; border: 1px solid transparent; background: transparent;
  color: inherit; cursor: pointer; padding: 0;
}
.icon-btn:hover { background: hsla(0, 0%, 100%, 0.12); }
.nav-toggle { display: none; }

.theme-toggle .theme-icon { display: grid; place-items: center; }
.theme-icon-dark { display: none; }
[data-theme='dark'] .theme-icon-light { display: none; }
[data-theme='dark'] .theme-icon-dark { display: grid; }

.topbar-avatar img { display: block; border-radius: 50%; border: 1px solid var(--topbar-border); }
.topbar-avatar:hover { opacity: 0.85; }

/* ---------- 5. 标签页 ---------- */
.tabs {
  display: flex; gap: 4px; flex-wrap: wrap;
  border-bottom: 1px solid var(--border-default);
  margin-bottom: 24px;
}
.tab {
  display: flex; align-items: center; gap: 6px;
  padding: 10px 12px 12px; margin-bottom: -1px;
  color: var(--fg-default); font-size: 14px;
  border-bottom: 2px solid transparent;
}
.tab:hover { border-bottom-color: var(--border-default); text-decoration: none; }
.tab.is-active { font-weight: 600; border-bottom-color: #fd8c73; }
[data-theme='dark'] .tab.is-active { border-bottom-color: #f78166; }
.tab .icon { color: var(--fg-muted); }
.tab-count {
  font-size: 12px; color: var(--fg-muted); background: var(--canvas-subtle);
  border-radius: 20px; padding: 0 7px; border: 1px solid var(--border-muted);
}

/* ---------- 6. 侧栏个人资料 ---------- */
.sidebar { display: flex; flex-direction: column; gap: 20px; position: relative; }
.profile { display: flex; flex-direction: column; gap: 8px; }
.avatar {
  width: 100%; max-width: 240px; aspect-ratio: 1; border-radius: 50%;
  border: 1px solid var(--border-default); background: var(--canvas-subtle);
  margin-bottom: 4px;
}
.profile-name { font-size: 24px; line-height: 1.25; }
.profile-handle { font-size: 18px; color: var(--fg-muted); font-weight: 300; }
.profile-status {
  font-size: 12px; color: var(--fg-muted); border: 1px solid var(--border-default);
  background: var(--canvas-subtle); border-radius: 20px; padding: 4px 12px; align-self: flex-start;
}
.profile-bio { font-size: 14px; color: var(--fg-default); margin-top: 4px; }
.profile-actions { display: flex; flex-direction: column; gap: 8px; margin-top: 8px; }
.profile-meta { list-style: none; display: flex; flex-direction: column; gap: 6px; margin-top: 12px; font-size: 13px; }
.profile-meta li { display: flex; align-items: center; gap: 8px; color: var(--fg-muted); }
.profile-meta .icon { color: var(--fg-muted); }
.profile-follow { font-size: 13px; color: var(--fg-muted); margin-top: 10px; }
.profile-follow b { color: var(--fg-default); }

.badges { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }
.badge {
  font-size: 12px; padding: 3px 9px; border-radius: 20px;
  background: var(--accent-subtle); color: var(--accent-fg);
  border: 1px solid var(--accent-muted);
}

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 6px 14px; border-radius: 6px; font-size: 13px; font-weight: 600;
  background: var(--btn-bg); color: var(--fg-default);
  border: 1px solid var(--btn-border); cursor: pointer;
  transition: background 0.15s ease;
}
.btn:hover { background: var(--btn-hover); text-decoration: none; }
.btn:active { background: var(--btn-active); }
.btn-primary { background: #1f883d; color: #fff; border-color: rgba(31, 35, 40, 0.15); }
.btn-primary:hover { background: #1a7f37; }
[data-theme='dark'] .btn-primary { background: #238636; }
[data-theme='dark'] .btn-primary:hover { background: #2ea043; }
.btn-block { width: 100%; }

.stat-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 12px; }
.stat-grid > div { background: var(--canvas-default); border: 1px solid var(--border-muted); border-radius: 6px; padding: 8px 10px; }
[data-theme='dark'] .stat-grid > div { background: var(--canvas-inset); }
.stat-grid dt { font-size: 12px; color: var(--fg-muted); }
.stat-grid dd { font-size: 18px; font-weight: 600; letter-spacing: -0.01em; }
.stat-grid dd small { font-size: 11px; font-weight: 400; color: var(--fg-muted); margin-left: 2px; }
.stat-foot { margin-top: 10px; font-size: 12px; color: var(--fg-muted); }

.tag-cloud { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 12px; }
.panel-more {
  display: inline-flex; align-items: center; gap: 2px; margin-top: 12px;
  font-size: 12px; color: var(--accent-fg);
}
.orgs { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 12px; }
.org {
  display: grid; place-items: center; width: 32px; height: 32px; border-radius: 6px;
  background: hsl(var(--h) 60% 45% / 0.15); color: hsl(var(--h) 65% 38%);
  border: 1px solid hsl(var(--h) 60% 45% / 0.3); font-weight: 700; font-size: 13px;
}
[data-theme='dark'] .org { color: hsl(var(--h) 70% 70%); }
.social-list { display: flex; flex-direction: column; gap: 8px; margin-top: 12px; }
.social-link { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--fg-default); }
.social-link .icon { color: var(--fg-muted); }
.social-link:hover { color: var(--accent-fg); text-decoration: none; }

/* ---------- 7. 面板 / 区块 ---------- */
.panel {
  border: 1px solid var(--border-default); border-radius: 6px;
  background: var(--canvas-subtle); padding: 16px;
}
[data-theme='dark'] .panel { background: var(--canvas-subtle); }
.side-panel { padding: 14px 16px; }
.panel-title { display: flex; align-items: center; gap: 6px; font-size: 13px; font-weight: 600; color: var(--fg-muted); }
.panel-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 4px; }
.panel-head h2 { font-size: 16px; }

.section { margin-bottom: 32px; }
.section-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 14px; }
.section-title { display: flex; align-items: center; gap: 8px; font-size: 16px; }
.section-title .icon { color: var(--fg-muted); }
.section-link { font-size: 13px; }
.empty {
  border: 1px dashed var(--border-default); border-radius: 6px;
  padding: 24px; text-align: center; color: var(--fg-muted);
}

/* ---------- 8. 文章卡片 / 列表 ---------- */
.card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 16px; }
.post-card {
  display: flex; flex-direction: column; gap: 8px;
  border: 1px solid var(--border-default); border-radius: 6px;
  padding: 16px; background: var(--canvas-default);
  transition: border-color 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
}
.post-card:hover { border-color: var(--accent-muted); box-shadow: var(--shadow-medium); }
.post-card-title { font-size: 15px; display: flex; align-items: center; gap: 6px; }
.post-card-title a { color: var(--accent-fg); }
.post-card-desc {
  font-size: 13px; color: var(--fg-muted);
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden;
}
.post-card-meta { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; margin-top: auto; padding-top: 8px; }
.pin { display: inline-flex; color: var(--attention-fg); }

.meta-item { display: inline-flex; align-items: center; gap: 4px; font-size: 12px; color: var(--fg-muted); }

.tag-chip {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 1px 8px; border-radius: 20px; font-size: 12px;
  background: var(--accent-subtle); color: var(--accent-fg);
  border: 1px solid transparent; white-space: nowrap;
}
.tag-chip:hover { background: var(--accent-emphasis); color: #fff; text-decoration: none; }
.tag-count { font-size: 11px; opacity: 0.75; }

.post-list { border: 1px solid var(--border-default); border-radius: 6px; overflow: hidden; }
.post-row {
  display: flex; align-items: center; gap: 12px;
  padding: 16px; background: var(--canvas-default);
  border-bottom: 1px solid var(--border-muted);
}
.post-row:last-child { border-bottom: 0; }
.post-row:hover { background: var(--canvas-subtle); }
.post-row-main { min-width: 0; flex: 1; }
.post-row-title { font-size: 15px; display: flex; align-items: center; gap: 6px; }
.post-row-desc { margin-top: 4px; font-size: 13px; color: var(--fg-muted); }
.post-row-meta { display: flex; align-items: center; flex-wrap: wrap; gap: 10px; margin-top: 8px; }
.post-row-arrow { color: var(--fg-subtle); }

/* ---------- 9. 贡献热力图 ---------- */
.graph-wrap { display: flex; flex-direction: column; gap: 8px; margin-top: 12px; }
.graph-months {
  display: grid; grid-auto-flow: column; grid-auto-columns: 13px; gap: 3px;
  font-size: 11px; color: var(--fg-muted); padding-left: 22px;
}
.graph-month { white-space: nowrap; }
.graph-scroll { overflow-x: auto; padding-bottom: 4px; }
.graph-body { display: flex; gap: 6px; }
.graph-weekdays {
  display: grid; grid-template-rows: repeat(7, 11px); gap: 3px;
  font-size: 10px; color: var(--fg-muted); width: 16px; text-align: right;
}
.graph-weekday { display: grid; place-items: end; }
.graph {
  display: grid; grid-auto-flow: column; grid-template-rows: repeat(7, 11px);
  grid-auto-columns: 11px; gap: 3px;
}
.g-cell { width: 11px; height: 11px; border-radius: 2px; background: var(--graph-0); }
i.g-cell { display: inline-block; }
.g-cell.lvl-1 { background: var(--graph-1); }
.g-cell.lvl-2 { background: var(--graph-2); }
.g-cell.lvl-3 { background: var(--graph-3); }
.g-cell.lvl-4 { background: var(--graph-4); }
.g-cell.is-empty { background: transparent; }
.graph [data-tip] { position: relative; cursor: pointer; }
.graph [data-tip]:hover { outline: 1px solid var(--fg-subtle); outline-offset: 1px; }
.graph-foot { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin-top: 6px; }
.graph-summary { font-size: 12px; color: var(--fg-muted); }
.graph-legend { display: inline-flex; align-items: center; gap: 4px; font-size: 11px; color: var(--fg-muted); }

/* ---------- 10. 动态流 ---------- */
.activity-panel { padding: 8px 16px 16px; }
.activity-month { font-size: 12px; font-weight: 600; color: var(--fg-muted); padding: 12px 0 8px; }
.activity-list { list-style: none; border-left: 1px solid var(--border-muted); margin-left: 8px; }
.activity-item {
  position: relative; display: flex; align-items: center; gap: 8px;
  padding: 7px 0 7px 20px; font-size: 13px;
}
.activity-mark {
  position: absolute; left: -11px; display: grid; place-items: center;
  width: 20px; height: 20px; border-radius: 50%;
  background: var(--canvas-default); border: 1px solid var(--border-default); color: var(--fg-muted);
}
.activity-text { flex: 1; min-width: 0; }
.activity-text a { font-weight: 600; }
.activity-time { font-size: 12px; color: var(--fg-muted); white-space: nowrap; }

/* ---------- 11. 分页 ---------- */
.pagination {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  margin-top: 24px; flex-wrap: wrap;
}
.page-numbers { display: flex; gap: 6px; flex-wrap: wrap; }
.page-item {
  display: inline-flex; align-items: center; gap: 4px;
  min-width: 32px; padding: 5px 10px; border-radius: 6px; font-size: 13px;
  justify-content: center; border: 1px solid var(--border-default); color: var(--fg-default);
  background: var(--canvas-default);
}
.page-item:hover { background: var(--canvas-subtle); text-decoration: none; }
.page-item.is-active { background: var(--accent-emphasis); border-color: var(--accent-emphasis); color: #fff; }
.page-item.is-disabled { color: var(--fg-subtle); background: var(--canvas-subtle); }
.page-nav { border: 0; background: transparent; color: var(--accent-fg); padding-left: 0; padding-right: 0; }
.page-nav:hover { background: transparent; text-decoration: underline; }
.page-nav.is-disabled { color: var(--fg-subtle); }
.page-nav.is-disabled:hover { text-decoration: none; }

/* ---------- 12. 标签页 / 归档页 ---------- */
.tag-cloud-large { display: flex; flex-wrap: wrap; gap: 10px; align-items: baseline; }
.tag-bubble {
  display: inline-flex; align-items: baseline; gap: 6px;
  padding: 6px 14px; border-radius: 20px;
  border: 1px solid var(--border-default); background: var(--canvas-subtle);
  color: var(--fg-default);
}
.tag-bubble:hover { border-color: var(--accent-muted); background: var(--accent-subtle); color: var(--accent-fg); text-decoration: none; }
.tag-bubble .n { font-size: 12px; color: var(--fg-muted); }

.tag-index { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 12px; }
.tag-card { border: 1px solid var(--border-default); border-radius: 6px; padding: 14px 16px; }
.tag-card h3 { font-size: 14px; display: flex; align-items: center; justify-content: space-between; }
.tag-card p { font-size: 12px; color: var(--fg-muted); margin-top: 6px; }

.year-block { margin-bottom: 28px; }
.year-head { display: flex; align-items: baseline; gap: 10px; margin-bottom: 12px; }
.year-head h2 { font-size: 20px; }
.year-head span { font-size: 13px; color: var(--fg-muted); }
.archive-list { list-style: none; border-left: 1px solid var(--border-muted); margin-left: 4px; }
.archive-item { position: relative; display: flex; align-items: baseline; gap: 10px; padding: 7px 0 7px 18px; }
.archive-item::before {
  content: ''; position: absolute; left: -3.5px; top: 14px;
  width: 6px; height: 6px; border-radius: 50%; background: var(--border-default);
}
.archive-item:hover::before { background: var(--accent-emphasis); }
.archive-date { font-size: 12px; color: var(--fg-muted); font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; white-space: nowrap; }
.archive-title { font-size: 14px; }
.archive-spark { display: flex; gap: 3px; align-items: flex-end; height: 26px; margin: 4px 0 16px 4px; }
.archive-spark i { width: 10px; border-radius: 2px 2px 0 0; background: var(--graph-2); display: block; }

/* ---------- 13. 文章页 ---------- */
/* 详情页没有侧栏，改用一列居中版式，正文 + 右侧目录 */
.page-post .layout { display: block; max-width: 1080px; }
.post-layout {
  display: grid; grid-template-columns: minmax(0, 1fr) 220px; gap: 40px; align-items: start;
}
.post-header { border-bottom: 1px solid var(--border-default); padding-bottom: 18px; margin-bottom: 24px; }
.back-link { display: inline-flex; align-items: center; gap: 4px; font-size: 13px; margin-bottom: 14px; }
.post-title { font-size: 32px; line-height: 1.25; letter-spacing: -0.01em; }
.post-meta { display: flex; align-items: center; flex-wrap: wrap; gap: 10px; margin-top: 14px; font-size: 13px; color: var(--fg-muted); }
.post-author { display: inline-flex; align-items: center; gap: 8px; color: var(--fg-default); font-weight: 600; }
.post-author img { width: 24px; height: 24px; border-radius: 50%; border: 1px solid var(--border-default); }
.post-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 14px; }

/* 目录 */
.toc { position: sticky; top: 90px; }
.toc-title { font-size: 12px; font-weight: 600; color: var(--fg-muted); margin-bottom: 10px; }
.toc ul { list-style: none; border-left: 1px solid var(--border-muted); }
.toc li a {
  display: block; padding: 4px 0 4px 12px; margin-left: -1px;
  border-left: 2px solid transparent; font-size: 13px; color: var(--fg-muted);
  line-height: 1.4;
}
.toc li.lvl-3 a { padding-left: 24px; font-size: 12.5px; }
.toc li a:hover { color: var(--fg-default); text-decoration: none; }
.toc li a.is-active { color: var(--fg-default); font-weight: 600; border-left-color: var(--accent-emphasis); }
.toc-foot { display: flex; gap: 12px; margin-top: 16px; font-size: 12px; }

/* 上下篇 */
.post-nav { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 40px; }
.post-nav-card {
  border: 1px solid var(--border-default); border-radius: 6px; padding: 12px 14px;
  display: flex; flex-direction: column; gap: 6px;
}
.post-nav-card:hover { border-color: var(--accent-muted); text-decoration: none; }
.post-nav-label { font-size: 12px; color: var(--fg-muted); display: flex; align-items: center; gap: 4px; }
.post-nav-title { font-size: 14px; font-weight: 600; color: var(--accent-fg); }
.post-nav-card.is-next { text-align: right; align-items: flex-end; }

.feedback {
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
  margin-top: 28px; padding: 16px; border-radius: 6px;
  border: 1px solid var(--border-default); background: var(--canvas-subtle);
  font-size: 13px; color: var(--fg-muted);
}
.feedback-btns { display: flex; gap: 8px; }
.feedback-btn {
  border: 1px solid var(--border-default); background: var(--canvas-default);
  border-radius: 6px; padding: 5px 12px; cursor: pointer; font-size: 13px; color: inherit;
}
.feedback-btn:hover { border-color: var(--accent-muted); background: var(--accent-subtle); }
.feedback-btn.is-picked { border-color: var(--accent-emphasis); color: var(--accent-fg); }
/* ---------- 14. 正文（Markdown） ---------- */
.markdown-body { font-size: 16px; line-height: 1.75; word-wrap: break-word; }
.markdown-body > *:first-child { margin-top: 0 !important; }
.markdown-body > *:last-child { margin-bottom: 0 !important; }
.markdown-body p { margin: 0 0 16px; }
.markdown-body h1, .markdown-body h2, .markdown-body h3, .markdown-body h4 { margin: 32px 0 16px; scroll-margin-top: 80px; }
.markdown-body h1 { font-size: 26px; padding-bottom: 8px; border-bottom: 1px solid var(--border-muted); }
.markdown-body h2 { font-size: 22px; padding-bottom: 8px; border-bottom: 1px solid var(--border-muted); }
.markdown-body h3 { font-size: 18px; }
.markdown-body h4 { font-size: 16px; color: var(--fg-muted); }
.markdown-body ul, .markdown-body ol { margin: 0 0 16px; padding-left: 2em; }
.markdown-body li { margin: 4px 0; }
.markdown-body li > ul, .markdown-body li > ol { margin: 4px 0; }
.markdown-body li + li { margin-top: 4px; }
.markdown-body li.task-list-item { list-style: none; margin-left: -1.4em; }
.markdown-body input[type='checkbox'] { margin-right: 8px; }

.heading-anchor {
  margin-left: 8px; color: var(--fg-subtle); opacity: 0;
  transition: opacity 0.15s ease; vertical-align: middle;
}
.markdown-body h1:hover .heading-anchor,
.markdown-body h2:hover .heading-anchor,
.markdown-body h3:hover .heading-anchor,
.markdown-body h4:hover .heading-anchor { opacity: 1; }
.heading-anchor:hover { color: var(--accent-fg); text-decoration: none; }

.markdown-body code {
  font-family: ui-monospace, SFMono-Regular, 'SF Mono', Menlo, Consolas, 'Liberation Mono', monospace;
  font-size: 0.86em; padding: 0.2em 0.4em; border-radius: 6px;
  background: var(--code-bg); border: 1px solid var(--border-muted);
}
.markdown-body pre { margin: 0; }
.markdown-body pre code { background: transparent; border: 0; padding: 0; font-size: 13px; line-height: 1.6; }

.markdown-body a { text-decoration: none; }
.markdown-body a:hover { text-decoration: underline; }
.markdown-body strong { font-weight: 600; }
.markdown-body hr { height: 1px; border: 0; background: var(--border-default); margin: 28px 0; }
.markdown-body img { border-radius: 6px; border: 1px solid var(--border-muted); background: var(--canvas-subtle); }
.markdown-body .callout {
  margin: 0 0 16px; padding: 12px 16px; border-radius: 6px;
  border-left: 4px solid var(--accent-emphasis); background: var(--canvas-subtle);
  color: var(--fg-muted);
}
.markdown-body .callout p:last-child { margin-bottom: 0; }
.markdown-body .table-wrap { overflow-x: auto; margin: 0 0 16px; }
.markdown-body table { border-collapse: collapse; width: 100%; font-size: 14px; }
.markdown-body th, .markdown-body td { border: 1px solid var(--border-default); padding: 6px 13px; }
.markdown-body th { background: var(--canvas-subtle); font-weight: 600; }
.markdown-body tr:nth-child(2n) td { background: var(--canvas-subtle); }
[data-theme='dark'] .markdown-body tr:nth-child(2n) td { background: #151b23; }

/* 提示块（GitHub 风格的 callout，可用 blockquote 语法手动加 emoji 标题） */
.markdown-body blockquote:not(.callout) {
  margin: 0 0 16px; padding: 0 1em; border-left: 3px solid var(--border-default); color: var(--fg-muted);
}

/* ---------- 15. 代码块 ---------- */
.code-block {
  margin: 0 0 16px; border: 1px solid var(--code-border); border-radius: 6px; overflow: hidden;
  background: var(--code-bg);
}
.code-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 6px 10px 6px 14px; background: var(--code-head);
  border-bottom: 1px solid var(--code-border);
}
.code-lang { font-size: 11px; letter-spacing: 0.06em; color: var(--fg-muted); font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
.code-copy {
  display: inline-flex; align-items: center; gap: 5px; cursor: pointer;
  font: inherit; font-size: 12px; color: var(--fg-muted);
  background: transparent; border: 1px solid transparent; border-radius: 5px; padding: 2px 8px;
}
.code-copy:hover { background: var(--canvas-default); border-color: var(--border-default); color: var(--fg-default); }
.code-copy.is-done { color: var(--success-fg); border-color: var(--success-fg); }
.code-block pre { padding: 14px; overflow-x: auto; }
.tok-comment { color: var(--tok-comment); font-style: italic; }
.tok-string { color: var(--tok-string); }
.tok-keyword { color: var(--tok-keyword); }
.tok-number, .tok-literal { color: var(--tok-number); }
.tok-func { color: var(--tok-func); }
.tok-op { color: var(--tok-op); }
.tok-tag { color: var(--tok-tag); }
.tok-attr { color: var(--tok-attr); }
.tok-heading { color: var(--tok-keyword); font-weight: 600; }
.tok-ins { color: var(--success-fg); }
.tok-del { color: var(--danger-fg); }

/* ---------- 16. 命令面板 ---------- */
.palette { position: fixed; inset: 0; z-index: 100; display: grid; place-items: start center; padding-top: 12vh; }
.palette-backdrop { position: absolute; inset: 0; background: rgba(1, 4, 9, 0.6); backdrop-filter: blur(2px); }
.palette-box {
  position: relative; width: min(640px, calc(100vw - 32px));
  background: var(--canvas-overlay); border: 1px solid var(--border-default);
  border-radius: 12px; box-shadow: var(--shadow-large); overflow: hidden;
  animation: palette-in 0.14s ease-out;
}
@keyframes palette-in { from { opacity: 0; transform: translateY(-6px) scale(0.99); } to { opacity: 1; } }
.palette-input {
  display: flex; align-items: center; gap: 10px; padding: 12px 14px;
  border-bottom: 1px solid var(--border-default); color: var(--fg-muted);
}
.palette-input input {
  flex: 1; border: 0; background: transparent; color: var(--fg-default);
  font: inherit; font-size: 15px; outline: none;
}
.palette-esc { font-size: 11px; }
.palette-body { max-height: min(56vh, 460px); overflow-y: auto; padding: 8px; }
.palette-hint { padding: 20px 12px; font-size: 13px; color: var(--fg-muted); text-align: center; }
.palette-group { padding: 10px 10px 4px; font-size: 11px; font-weight: 600; color: var(--fg-muted); letter-spacing: 0.04em; }
.palette-item {
  display: flex; align-items: flex-start; gap: 10px; width: 100%;
  padding: 9px 10px; border-radius: 8px; border: 0; background: transparent;
  color: var(--fg-default); text-align: left; cursor: pointer; font: inherit;
}
.palette-item .icon { color: var(--fg-muted); margin-top: 2px; }
.palette-item:hover, .palette-item.is-active { background: var(--accent-subtle); text-decoration: none; }
.palette-item.is-active .palette-title { color: var(--accent-fg); }
.palette-title { font-size: 14px; font-weight: 600; }
.palette-title mark { background: transparent; color: var(--accent-fg); text-decoration: underline; }
.palette-sub { font-size: 12px; color: var(--fg-muted); margin-top: 2px; display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.palette-foot {
  display: flex; align-items: center; gap: 14px; flex-wrap: wrap;
  padding: 8px 14px; border-top: 1px solid var(--border-default);
  background: var(--canvas-subtle); font-size: 11px; color: var(--fg-muted);
}
.palette-foot kbd { margin-right: 3px; }
.palette-brand { margin-left: auto; display: inline-flex; align-items: center; gap: 4px; }

/* ---------- 17. 页脚 ---------- */
.site-footer {
  border-top: 1px solid var(--border-default); padding: 28px 0 40px;
  font-size: 13px; color: var(--fg-muted);
}
.footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.footer-left { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.footer-mark { display: inline-grid; place-items: center; width: 22px; height: 22px; border-radius: 50%; background: var(--canvas-subtle); border: 1px solid var(--border-default); }
.footer-links { display: flex; gap: 16px; flex-wrap: wrap; }
.footer-dot { opacity: 0.5; }

/* ---------- 18. 浮层：提示 / 回到顶部 ---------- */
.tooltip {
  position: fixed; z-index: 90; pointer-events: none;
  background: var(--fg-default); color: var(--canvas-default);
  font-size: 11px; padding: 4px 8px; border-radius: 6px; white-space: nowrap;
  box-shadow: var(--shadow-medium);
}
.to-top {
  position: fixed; right: 24px; bottom: 24px; z-index: 40;
  width: 40px; height: 40px; border-radius: 50%;
  background: var(--accent-emphasis); color: #fff; border: 1px solid var(--border-default);
  display: grid; place-items: center; cursor: pointer; box-shadow: var(--shadow-medium);
}
.to-top:hover { filter: brightness(1.08); }

/* ---------- 19. 关于页 ---------- */
.about-card { border: 1px solid var(--border-default); border-radius: 6px; padding: 24px; margin-bottom: 20px; }
.about-header { display: flex; gap: 20px; align-items: center; flex-wrap: wrap; }
.about-header img { width: 96px; height: 96px; border-radius: 50%; border: 1px solid var(--border-default); }
.about-header h1 { font-size: 24px; }
.about-header p { color: var(--fg-muted); font-size: 14px; margin-top: 6px; }
.about-facts { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 14px; margin-top: 20px; }
.about-fact { display: flex; gap: 10px; align-items: flex-start; font-size: 13px; }
.about-fact .icon { color: var(--fg-muted); margin-top: 2px; }
.about-fact b { display: block; font-weight: 600; }
.about-fact span { color: var(--fg-muted); }
.tech-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }

/* ---------- 20. 404 ---------- */
.notfound { text-align: center; padding: 64px 0 96px; }
.notfound-mark {
  display: inline-grid; place-items: center; width: 96px; height: 96px; border-radius: 50%;
  background: var(--canvas-subtle); border: 1px solid var(--border-default); color: var(--fg-muted);
  margin-bottom: 20px;
}
.notfound h1 { font-size: 40px; letter-spacing: -0.02em; }
.notfound p { color: var(--fg-muted); margin-top: 10px; }
.notfound .btn { margin-top: 20px; }

/* ---------- 21. 响应式 ---------- */
/* 1180px 以下：文章页收起右侧目录，正文占满 */
@media (max-width: 1180px) {
  .layout { grid-template-columns: 264px minmax(0, 1fr); gap: 28px; }
  .post-layout { grid-template-columns: minmax(0, 1fr); }
  .toc { display: none; }
}
/* 1012px 以下：侧栏变成顶部资料卡 */
@media (max-width: 1012px) {
  .layout { grid-template-columns: minmax(0, 1fr); gap: 24px; padding-top: 20px; }
  .profile { flex-direction: row; flex-wrap: wrap; align-items: flex-start; gap: 14px 18px; }
  .avatar { width: 104px; max-width: 104px; margin: 0; }
  .profile-name { font-size: 22px; }
  .profile-handle { font-size: 16px; }
  .profile-actions, .profile-meta, .profile-follow, .badges, .profile-bio { flex-basis: 100%; }
  .sidebar .side-panel { display: none; }
  .sidebar .side-panel.is-mobile { display: block; }
}
@media (max-width: 860px) {
  .search-trigger-text { display: none; }
  .search-trigger { flex: 0 0 auto; }
  .search-kbd { display: none; }
}
@media (max-width: 760px) {
  .container { padding: 0 16px; }
  .topbar-inner { padding: 10px 16px; gap: 10px; position: relative; }
  .nav-toggle { display: grid; }
  .brand-text i { display: none; }
  .topnav {
    position: absolute; left: 0; right: 0; top: 100%;
    flex-direction: column; align-items: stretch; gap: 2px;
    background: var(--topbar); border-bottom: 1px solid var(--topbar-border);
    padding: 8px 16px 12px; display: none; z-index: 1;
  }
  .topnav.is-open { display: flex; }
  .tabs { flex-wrap: nowrap; overflow-x: auto; scrollbar-width: none; }
  .tabs::-webkit-scrollbar { display: none; }
  .post-title { font-size: 26px; }
  .post-nav { grid-template-columns: 1fr; }
  .card-grid { grid-template-columns: 1fr; }
  .markdown-body { font-size: 15px; }
  .to-top { right: 16px; bottom: 16px; }
  .about-header img { width: 72px; height: 72px; }
  .stat-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 460px) {
  .profile-actions { flex-direction: row; }
  .post-row-meta .meta-item:last-of-type { display: none; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
}
/* ---------- 22. 打印 ---------- */
@media print {
  .topbar, .sidebar, .toc, .site-footer, .to-top, .palette, .post-nav, .feedback, .reading-progress { display: none !important; }
  .layout, .post-layout { grid-template-columns: 1fr; gap: 0; }
  body { font-size: 12pt; }
  .markdown-body a { color: inherit; text-decoration: underline; }
}