/* ===================================================================
   bcxm theme — 主样式
   配色取自 bcxm 主题调色板：主色 #49B1F5 / 次色 #00c4b6 / 强调 #FF7242
   =================================================================== */

/* ---------- 1. 变量 ---------- */
:root {
  --bcxm-main: #49B1F5;
  --bcxm-paginator: #00c4b6;
  --bcxm-hover: #FF7242;
  --bcxm-selection: #00c4b6;
  --bcxm-link: #99a9bf;
  --bcxm-meta: #858585;
  --bcxm-hr: #A4D8FA;
  --bcxm-code-fg: #F47466;
  --bcxm-toc: #00c4b6;

  --bg: #f7f9fe;
  --bg-soft: #eef3f9;
  --card: #ffffff;
  --font: #4c4948;
  --font-high: #1f2d3d;
  --font-mute: #858585;
  --border: rgba(7, 17, 27, .06);
  --border-strong: rgba(7, 17, 27, .1);
  --chip-bg: rgba(73, 177, 245, .1);

  --shadow-sm: 0 1px 2px rgba(7, 17, 27, .04);
  --shadow: 0 1px 3px rgba(7, 17, 27, .04), 0 8px 24px -12px rgba(7, 17, 27, .14);
  --shadow-lg: 0 4px 10px rgba(7, 17, 27, .06), 0 18px 44px -18px rgba(7, 17, 27, .22);
  --shadow-pop: 0 12px 32px -8px rgba(7, 17, 27, .18), 0 2px 8px rgba(7, 17, 27, .06);

  --radius: 10px;
  --radius-sm: 8px;
  --radius-pill: 999px;

  --header-h: 60px;
  --content-w: 1230px;
  --aside-w: 26%;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue",
    Helvetica, Arial, sans-serif;
  --font-mono: "SFMono-Regular", "JetBrains Mono", Menlo, Consolas,
    "Liberation Mono", "Courier New", monospace;

  --ease: cubic-bezier(.4, 0, .2, 1);
}

[data-theme="dark"] {
  --bg: #121212;
  --bg-soft: #171717;
  --card: #1e1e1e;
  --font: #c4c6c9;
  --font-high: #ffffff;
  --font-mute: #8a8f96;
  --border: rgba(255, 255, 255, .07);
  --border-strong: rgba(255, 255, 255, .12);
  --chip-bg: rgba(73, 177, 245, .14);

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, .3);
  --shadow: 0 1px 3px rgba(0, 0, 0, .4), 0 8px 24px -12px rgba(0, 0, 0, .6);
  --shadow-lg: 0 4px 10px rgba(0, 0, 0, .45), 0 18px 44px -18px rgba(0, 0, 0, .7);
  --shadow-pop: 0 12px 32px -8px rgba(0, 0, 0, .7), 0 2px 8px rgba(0, 0, 0, .4);
}

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--font);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color .3s var(--ease), color .3s var(--ease);
}

::selection {
  background: var(--bcxm-selection);
  color: #fff;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color .2s var(--ease);
}

img { max-width: 100%; }

button {
  font: inherit;
  color: inherit;
  border: 0;
  background: none;
  cursor: pointer;
}

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

.icon {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex: none;
  vertical-align: -.18em;
}

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* 顶部滚动进度条 */
.scroll-progress {
  position: fixed;
  top: 0; left: 0;
  z-index: 200;
  width: 100%;
  height: 2px;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--bcxm-main), var(--bcxm-paginator));
  transition: transform .1s linear;
  will-change: transform;
}

/* ---------- 3. 顶部导航 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 150;
  height: var(--header-h);
  background: var(--card);
  background: color-mix(in srgb, var(--card) 82%, transparent);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--border);
  transition: box-shadow .3s var(--ease), background-color .3s var(--ease);
}

.site-header.is-stuck { box-shadow: 0 2px 16px -8px rgba(7, 17, 27, .18); }
[data-theme="dark"] .site-header.is-stuck { box-shadow: 0 2px 16px -8px rgba(0, 0, 0, .8); }

.header-inner {
  display: flex;
  align-items: center;
  gap: 20px;
  max-width: var(--content-w);
  height: 100%;
  margin: 0 auto;
  padding: 0 20px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex: none;
  font-weight: 700;
  font-size: 16.5px;
  letter-spacing: .2px;
  color: var(--font-high);
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 26px;
  height: 26px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--bcxm-main), var(--bcxm-paginator));
  box-shadow: 0 4px 10px -4px var(--bcxm-main);
}

.brand-mark span {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 0 0 3px rgba(255, 255, 255, .35);
}

.brand:hover .brand-mark { transform: rotate(-8deg) scale(1.06); }
.brand-mark { transition: transform .35s var(--ease); }

.nav {
  display: flex;
  align-items: center;
  gap: 2px;
  margin-left: auto;
}

.nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 7px 13px;
  border-radius: var(--radius-pill);
  color: var(--font);
  font-size: 14.5px;
  white-space: nowrap;
  transition: color .2s var(--ease), background-color .2s var(--ease);
}

.nav-link:hover,
.nav-link.active {
  color: var(--bcxm-main);
  background: var(--chip-bg);
}

.nav-link.active { font-weight: 600; }

.nav-item { position: relative; }

.nav-toggle .caret {
  width: 14px; height: 14px;
  transition: transform .25s var(--ease);
}

.nav-item.is-open .nav-toggle .caret { transform: rotate(180deg); }

.nav-dropdown {
  position: absolute;
  top: calc(100% + 10px);
  left: 50%;
  min-width: 184px;
  padding: 8px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--card);
  box-shadow: var(--shadow-pop);
  opacity: 0;
  visibility: hidden;
  transform: translate(-50%, -6px);
  transition: opacity .2s var(--ease), transform .2s var(--ease), visibility .2s;
}

.nav-item:hover .nav-dropdown,
.nav-item.is-open .nav-dropdown,
.nav-item:focus-within .nav-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translate(-50%, 0);
}

.dropdown-link {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 9px 11px;
  border-radius: 8px;
  color: var(--font);
  font-size: 14px;
  transition: background-color .18s var(--ease), color .18s var(--ease);
}

.dropdown-link .icon { width: 16px; height: 16px; color: var(--font-mute); }

.dropdown-link:hover {
  background: var(--chip-bg);
  color: var(--bcxm-main);
}

.dropdown-link:hover .icon { color: var(--bcxm-main); }

.header-actions {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: none;
}

.icon-btn {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  color: var(--font);
  transition: background-color .2s var(--ease), color .2s var(--ease);
}

.icon-btn:hover {
  background: var(--bg-soft);
  color: var(--bcxm-main);
}

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

.nav-burger { display: none; }

/* ---------- 4. 抽屉菜单 ---------- */
.drawer {
  position: fixed;
  inset: 0;
  z-index: 300;
  pointer-events: none;
}

.drawer-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(7, 17, 27, .45);
  backdrop-filter: blur(2px);
  opacity: 0;
  transition: opacity .3s var(--ease);
}

.drawer-panel {
  position: absolute;
  top: 0; left: 0;
  display: flex;
  flex-direction: column;
  width: min(310px, 84vw);
  height: 100%;
  padding: 18px 18px 28px;
  background: var(--card);
  border-right: 1px solid var(--border);
  overflow-y: auto;
  transform: translateX(-102%);
  transition: transform .34s var(--ease);
}

.drawer.open { pointer-events: auto; }
.drawer.open .drawer-backdrop { opacity: 1; }
.drawer.open .drawer-panel { transform: translateX(0); }

.drawer-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border);
}

.drawer-title {
  font-weight: 700;
  color: var(--font-high);
  font-size: 15px;
}

.drawer-author {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 18px 0;
}

.drawer-avatar {
  width: 46px; height: 46px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--border);
}

.drawer-author-meta { display: flex; flex-direction: column; min-width: 0; }
.drawer-name { font-weight: 600; color: var(--font-high); font-size: 14.5px; }
.drawer-desc { color: var(--font-mute); font-size: 12.5px; }

.drawer-nav { display: flex; flex-direction: column; gap: 2px; }

.drawer-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 9px;
  color: var(--font);
  font-size: 14.5px;
  transition: background-color .18s var(--ease), color .18s var(--ease);
}

.drawer-link:hover,
.drawer-link.active { background: var(--chip-bg); color: var(--bcxm-main); }
.drawer-link.active { font-weight: 600; }
.drawer-sub { padding-left: 24px; font-size: 14px; color: var(--font-mute); }
.drawer-group { display: flex; flex-direction: column; gap: 2px; }
.drawer-group-title { color: var(--font-mute); font-size: 12.5px; letter-spacing: .06em; text-transform: uppercase; }

.drawer-social {
  display: flex;
  gap: 8px;
  margin-top: auto;
  padding-top: 22px;
}

.drawer-social a {
  display: grid;
  place-items: center;
  width: 36px; height: 36px;
  border-radius: 10px;
  background: var(--bg-soft);
  color: var(--font);
}

.drawer-social a:hover { background: var(--chip-bg); color: var(--bcxm-main); }

/* ---------- 5. 布局 ---------- */
.layout {
  display: flex;
  align-items: flex-start;
  gap: 25px;
  max-width: var(--content-w);
  margin: 0 auto;
  padding: 25px 20px 40px;
}

.layout.aside-right { flex-direction: row-reverse; }
.layout.no-aside .main-content { width: 100%; }

.main-content {
  flex: 1;
  min-width: 0;
  width: 74%;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* ---------- 6. 通用卡片 ---------- */
.card-widget {
  position: relative;
  padding: 20px 24px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: box-shadow .3s var(--ease), border-color .3s var(--ease),
    transform .3s var(--ease), background-color .3s var(--ease);
}

.item-headline,
.section-title {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-bottom: 10px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--border);
  font-size: 15.5px;
  font-weight: 600;
  color: var(--font-high);
}

.item-headline .icon,
.section-title .icon { color: var(--bcxm-main); }

/* ---------- 7. 首页文章卡片 ---------- */
.post-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.post-card {
  display: flex;
  gap: 20px;
  padding: 18px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: transform .3s var(--ease), box-shadow .3s var(--ease),
    border-color .3s var(--ease), background-color .3s var(--ease);
}

.post-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-color: color-mix(in srgb, var(--bcxm-main) 35%, var(--border));
}

.post-card-cover {
  position: relative;
  flex: none;
  width: 232px;
  height: 152px;
  overflow: hidden;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, #dceafd, #e8f7f5);
}

.post-card-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .5s var(--ease);
}

.post-card:hover .post-card-cover img { transform: scale(1.05); }

/* 深色模式下压低封面亮度，避免浅色封面过曝 */
[data-theme="dark"] .post-card-cover img,
[data-theme="dark"] .cover-fallback { filter: brightness(.84) saturate(.92); }

.cover-fallback {
  display: grid;
  place-items: center;
  width: 100%;
  height: 100%;
  font-size: 40px;
  font-weight: 700;
  color: rgba(73, 177, 245, .55);
  background: linear-gradient(135deg, #e4f1fd, #e6f8f6);
}

.post-card-body {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-width: 0;
  flex: 1;
}

.post-card-title {
  margin: 0 0 8px;
  font-size: 18px;
  line-height: 1.5;
  font-weight: 600;
  color: var(--font-high);
}

.post-card-title a { transition: color .2s var(--ease); }
.post-card-title a:hover { color: var(--bcxm-main); }

.post-card-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 14px;
  margin-bottom: 8px;
  color: var(--font-mute);
  font-size: 12.5px;
}

.meta-item {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.meta-item .icon { width: 14px; height: 14px; }
.meta-item a { color: var(--font-mute); }
.meta-item a:hover { color: var(--bcxm-main); }

.post-card-excerpt {
  margin: 0 0 12px;
  color: var(--font-mute);
  font-size: 13.5px;
  line-height: 1.75;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.post-card-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.post-card-more {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--bcxm-main);
  font-size: 13px;
  font-weight: 500;
}

.post-card-more span { transition: transform .25s var(--ease); }
.post-card-more:hover span { transform: translateX(4px); }

.post-card-tags { display: flex; gap: 6px; flex-wrap: wrap; }

.chip {
  display: inline-block;
  padding: 2px 9px;
  border-radius: var(--radius-pill);
  background: var(--chip-bg);
  color: var(--bcxm-main);
  font-size: 12px;
  line-height: 1.7;
  transition: background-color .2s var(--ease), color .2s var(--ease);
}

.chip:hover { background: var(--bcxm-main); color: #fff; }

/* ---------- 8. 侧栏 ---------- */
.aside-content {
  flex: none;
  width: var(--aside-w);
  min-width: 0;
}

.aside-sticky {
  position: sticky;
  top: calc(var(--header-h) + 20px);
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.card-author {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 26px 22px 22px;
  text-align: center;
}

.author-avatar {
  width: 96px;
  height: 96px;
  padding: 3px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--bcxm-main), var(--bcxm-paginator));
  transition: transform .5s var(--ease);
}

.author-avatar:hover { transform: rotate(6deg) scale(1.03); }

.author-avatar img {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--card);
  background: var(--card);
}

.author-name {
  margin-top: 12px;
  font-size: 18px;
  font-weight: 600;
  color: var(--font-high);
  letter-spacing: .2px;
}

.author-desc {
  margin-top: 2px;
  color: var(--font-mute);
  font-size: 12.5px;
}

.author-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  width: 100%;
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
}

.author-stat {
  display: flex;
  flex-direction: column;
  gap: 1px;
  color: var(--font);
  transition: color .2s var(--ease);
}

.author-stat:hover { color: var(--bcxm-main); }
.author-stat + .author-stat { border-left: 1px solid var(--border); }

.stat-num { font-size: 19px; font-weight: 600; color: var(--font-high); line-height: 1.3; }
.author-stat:hover .stat-num { color: var(--bcxm-main); }
.stat-label { font-size: 12px; color: var(--font-mute); }

.author-social {
  display: flex;
  justify-content: center;
  gap: 6px;
  margin-top: 14px;
}

.social-link {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 9px;
  color: var(--font-mute);
  transition: background-color .2s var(--ease), color .2s var(--ease),
    transform .3s var(--ease);
}

.social-link:hover {
  background: var(--chip-bg);
  color: var(--bcxm-main);
  transform: translateY(-2px);
}

.announcement-body {
  color: var(--font-mute);
  font-size: 13.5px;
  line-height: 1.8;
}

/* 分类卡片 */
.card-category-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.category-item a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 7px 10px;
  border-radius: 8px;
  color: var(--font);
  font-size: 13.5px;
  transition: background-color .22s var(--ease), padding .22s var(--ease),
    color .22s var(--ease);
}

.category-item a:hover {
  padding-left: 16px;
  background: var(--bg-soft);
  color: var(--bcxm-main);
}

.category-name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.category-count { color: var(--font-mute); font-size: 12px; }

/* 网站资讯 */
.webinfo { display: flex; flex-direction: column; gap: 4px; }

.webinfo-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 5px 2px;
  color: var(--font-mute);
  font-size: 13px;
}

.webinfo-item b { color: var(--font-high); font-weight: 600; }

/* 目录卡片 */
.card-toc .item-headline { margin-bottom: 10px; }

.toc-percent {
  margin-left: auto;
  color: var(--bcxm-toc);
  font-size: 12.5px;
  font-style: normal;
  font-weight: 600;
}

.toc-body { max-height: min(52vh, 420px); overflow-y: auto; }

.toc-body .toc { margin: 0; padding: 0; list-style: none; }
.toc-body .toc-child { margin: 0; padding-left: 13px; list-style: none; }

.toc-body .toc-link {
  display: block;
  padding: 3px 8px;
  border-left: 2px solid transparent;
  border-radius: 0 6px 6px 0;
  color: var(--font-mute);
  font-size: 13px;
  line-height: 1.6;
  transition: color .2s var(--ease), background-color .2s var(--ease),
    border-color .2s var(--ease);
}

.toc-body .toc-link:hover { color: var(--bcxm-main); }

.toc-body .toc-link.active {
  border-left-color: var(--bcxm-toc);
  background: color-mix(in srgb, var(--bcxm-toc) 10%, transparent);
  color: var(--bcxm-toc);
  font-weight: 500;
}

.toc-empty { margin: 0; color: var(--font-mute); font-size: 13px; }

/* ---------- 9. 归档 / 标签 / 分类页 ---------- */
.page-hero { padding: 26px 24px; }

.page-hero-kicker {
  margin: 0 0 4px;
  color: var(--bcxm-main);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
}

.page-hero-title {
  margin: 0;
  font-size: 26px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--font-high);
  letter-spacing: -.01em;
}

.page-hero-desc { margin: 6px 0 0; color: var(--font-mute); font-size: 13px; }
.page-hero-content { margin-top: 12px; color: var(--font); font-size: 14px; }

.archive-card { padding: 12px 24px 26px; }

.archive-list { display: flex; flex-direction: column; }

.archive-year {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 22px 0 8px;
  font-size: 21px;
  font-weight: 700;
  color: var(--font-high);
}

.archive-year::after {
  content: "";
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--bcxm-hr), transparent);
}

.archive-year span { position: relative; }

.archive-item {
  position: relative;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 9px 10px 9px 22px;
  border-radius: 8px;
  color: var(--font);
  font-size: 14.5px;
  transition: background-color .2s var(--ease), color .2s var(--ease);
}

.archive-item::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 50%;
  width: 6px;
  height: 6px;
  margin-top: -3px;
  border-radius: 50%;
  background: var(--border-strong);
  transition: background-color .2s var(--ease), transform .2s var(--ease);
}

.archive-item:hover { background: var(--bg-soft); color: var(--bcxm-main); }
.archive-item:hover::before { background: var(--bcxm-main); transform: scale(1.35); }

.archive-date {
  flex: none;
  width: 52px;
  color: var(--font-mute);
  font-size: 12.5px;
  font-variant-numeric: tabular-nums;
}

.archive-title { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.archive-cat {
  flex: none;
  padding: 1px 8px;
  border-radius: var(--radius-pill);
  background: var(--chip-bg);
  color: var(--bcxm-main);
  font-size: 11.5px;
}

.tag-cloud-card {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  padding: 22px 24px;
}

.tag-cloud-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 13px;
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  color: var(--font);
  font-size: 13.5px;
  transition: all .22s var(--ease);
}

.tag-cloud-item:hover {
  border-color: var(--bcxm-main);
  color: var(--bcxm-main);
  transform: translateY(-2px);
}

.tag-cloud-count {
  color: var(--font-mute);
  font-size: 11.5px;
  font-variant-numeric: tabular-nums;
}

.category-page-card { display: flex; flex-direction: column; gap: 2px; padding: 14px 16px; }

.category-page-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px;
  border-radius: 9px;
  color: var(--font);
  font-size: 14.5px;
  transition: background-color .2s var(--ease), color .2s var(--ease);
}

.category-page-item:hover { background: var(--bg-soft); color: var(--bcxm-main); }
.category-page-name { display: inline-flex; align-items: center; gap: 9px; }
.category-page-name .icon { color: var(--bcxm-main); }
.category-page-count { color: var(--font-mute); font-size: 12.5px; }

/* ---------- 10. 分页 ---------- */
.pagination {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 6px;
}

.pagination a,
.pagination span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  height: 36px;
  padding: 0 11px;
  border-radius: 9px;
  background: var(--card);
  border: 1px solid var(--border);
  color: var(--font);
  font-size: 13.5px;
  transition: all .22s var(--ease);
}

.pagination a:hover {
  border-color: var(--bcxm-paginator);
  color: var(--bcxm-paginator);
  transform: translateY(-2px);
}

.pagination .current {
  background: var(--bcxm-paginator);
  border-color: var(--bcxm-paginator);
  color: #fff;
  font-weight: 600;
}

.pagination .space {
  background: none;
  border-color: transparent;
  color: var(--font-mute);
}

.pagination .extend { font-size: 13px; }

/* ---------- 11. 页脚 ---------- */
.site-footer {
  margin-top: 10px;
  padding: 28px 20px 34px;
  border-top: 1px solid var(--border);
  background: var(--card);
  text-align: center;
}

.footer-inner { max-width: var(--content-w); margin: 0 auto; }

.site-footer p {
  margin: 0 0 6px;
  color: var(--font-mute);
  font-size: 13px;
  line-height: 1.9;
}

.site-footer p:last-child { margin-bottom: 0; }
.footer-copyright { color: var(--font) !important; }
.footer-symbol { color: var(--bcxm-main); }

.site-footer a { color: var(--bcxm-main); }
.site-footer a:hover { color: var(--bcxm-hover); }
.footer-sep { margin: 0 6px; color: var(--border-strong); }

/* 备案信息：工信部要求位于网站底部，且需清晰可读、可点击查询 */
.site-footer .footer-beian {
  margin: 8px 0 0;
  font-size: 13px;
  letter-spacing: .01em;
}

.site-footer .beian-link {
  color: var(--font);
  border-bottom: 1px dotted transparent;
  padding-bottom: 1px;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.site-footer .beian-link:hover {
  color: var(--bcxm-main);
  border-bottom-color: currentColor;
}

/* ---------- 12. 右下角按钮 ---------- */
.rightside {
  position: fixed;
  right: 22px;
  bottom: 40px;
  z-index: 120;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.rightside-btn {
  position: relative;
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--card);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  color: var(--font);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px) scale(.92);
  transition: opacity .28s var(--ease), transform .28s var(--ease),
    visibility .28s, color .2s var(--ease), background-color .2s var(--ease);
}

.rightside-btn.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}

.rightside-btn:hover {
  color: var(--bcxm-main);
  background: var(--card);
  box-shadow: var(--shadow-lg);
}

.rightside-btn .icon { position: relative; z-index: 1; width: 19px; height: 19px; }

.progress-ring {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}

.progress-ring circle {
  fill: none;
  stroke-width: 2.5;
  stroke-linecap: round;
}

.ring-track { stroke: var(--border); }

.ring-bar {
  stroke: var(--bcxm-main);
  stroke-dasharray: 97.4;
  stroke-dashoffset: 97.4;
  transition: stroke-dashoffset .1s linear;
}

/* ---------- 13. 搜索弹层 ---------- */
.search-modal {
  position: fixed;
  inset: 0;
  z-index: 400;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 12vh 20px 40px;
  opacity: 0;
  visibility: hidden;
  transition: opacity .25s var(--ease), visibility .25s;
}

.search-modal.is-open { opacity: 1; visibility: visible; }

.search-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(7, 17, 27, .5);
  backdrop-filter: blur(3px);
}

.search-panel {
  position: relative;
  width: 100%;
  max-width: 620px;
  max-height: 70vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: 0 24px 60px -12px rgba(7, 17, 27, .35);
  transform: translateY(-10px) scale(.98);
  transition: transform .25s var(--ease);
}

.search-modal.is-open .search-panel { transform: translateY(0) scale(1); }

.search-field {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 15px 18px;
  border-bottom: 1px solid var(--border);
  color: var(--font-mute);
}

.search-field input {
  flex: 1;
  min-width: 0;
  border: 0;
  outline: 0;
  background: none;
  color: var(--font-high);
  font-family: inherit;
  font-size: 15.5px;
}

.search-field input::placeholder { color: var(--font-mute); }

.search-esc {
  padding: 2px 7px;
  border: 1px solid var(--border);
  border-radius: 5px;
  background: var(--bg-soft);
  color: var(--font-mute);
  font-family: var(--font-mono);
  font-size: 11px;
}

.search-results {
  overflow-y: auto;
  padding: 8px;
}

.search-hint {
  margin: 14px 12px;
  color: var(--font-mute);
  font-size: 13.5px;
}

.search-result {
  display: block;
  padding: 11px 13px;
  border-radius: 9px;
  transition: background-color .18s var(--ease);
}

.search-result:hover,
.search-result.is-active { background: var(--bg-soft); }

.search-result-title {
  display: block;
  color: var(--font-high);
  font-size: 14.5px;
  font-weight: 500;
  margin-bottom: 2px;
}

.search-result-title mark {
  background: color-mix(in srgb, var(--bcxm-main) 22%, transparent);
  color: inherit;
  padding: 0 1px;
  border-radius: 3px;
}

.search-result-meta {
  display: flex;
  gap: 10px;
  color: var(--font-mute);
  font-size: 12px;
}

.search-result-excerpt {
  margin: 3px 0 0;
  color: var(--font-mute);
  font-size: 12.5px;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ---------- 14. 响应式 ---------- */
@media (max-width: 1100px) {
  :root { --aside-w: 30%; }
  .post-card-cover { width: 200px; height: 134px; }
}

@media (max-width: 900px) {
  .nav { display: none; }
  .nav-burger { display: grid; }
  /* .nav 隐藏后需要它来把右侧操作区推到最右 */
  .header-actions { margin-left: auto; }
  .layout { padding: 20px 16px 32px; }
  .main-content { width: 100%; }
  .aside-content { display: none; }
  .rightside { right: 14px; bottom: 24px; }
  .rightside .toc-mobile-btn { display: grid; }
}

@media (max-width: 640px) {
  html { font-size: 15px; }
  body { font-size: 14.5px; }

  .header-inner { padding: 0 14px; gap: 10px; }
  .brand { font-size: 15px; }
  .brand-mark { width: 23px; height: 23px; border-radius: 7px; }

  .post-card { flex-direction: column; gap: 14px; padding: 14px; }
  .post-card-cover { width: 100%; height: 172px; }
  .post-card-title { font-size: 16.5px; }
  .post-card-excerpt { -webkit-line-clamp: 3; }
  .post-card-foot { flex-wrap: wrap; }

  .page-hero { padding: 20px 18px; }
  .page-hero-title { font-size: 21px; }
  .card-widget { padding: 16px 18px; }
  .archive-card { padding: 6px 16px 20px; }
  .archive-item { gap: 10px; padding-left: 18px; font-size: 14px; }
  .archive-cat { display: none; }
  .search-modal { padding-top: 8vh; }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }
}

/* ---------- 15. 文章页（其余样式在 post.css） ---------- */
.post-full { padding: 30px 34px; }
.page-full { padding: 30px 34px; }

.post-header { margin-bottom: 20px; }

.post-title {
  margin: 0 0 12px;
  font-size: 28px;
  line-height: 1.42;
  font-weight: 700;
  color: var(--font-high);
  letter-spacing: -.01em;
}

.page-subtitle { margin: 0 0 12px; color: var(--font-mute); font-size: 14px; }

.post-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 16px;
  padding-bottom: 16px;
  border-bottom: 1px dashed var(--border-strong);
  color: var(--font-mute);
  font-size: 12.5px;
}

.post-cover {
  margin: 4px 0 24px;
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.post-cover img {
  display: block;
  width: 100%;
  max-height: 380px;
  object-fit: cover;
}

.post-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: 26px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}

.post-copyright {
  margin-top: 24px;
  padding: 16px 18px;
  border-left: 3px solid var(--bcxm-main);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: color-mix(in srgb, var(--bcxm-main) 7%, transparent);
}

[data-theme="dark"] .post-copyright {
  background: color-mix(in srgb, var(--bcxm-main) 10%, transparent);
}

.post-copyright p {
  margin: 0 0 6px;
  color: var(--font);
  font-size: 13px;
  line-height: 1.85;
  word-break: break-all;
}

.post-copyright p:last-child { margin-bottom: 0; }
.post-copyright strong { color: var(--font-high); font-weight: 600; }
.post-copyright a { color: var(--bcxm-main); border-bottom: 1px dashed currentColor; }

.post-pagination {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.post-pagination-item {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: 14px 18px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: transform .25s var(--ease), box-shadow .25s var(--ease),
    border-color .25s var(--ease);
}

.post-pagination-item:hover {
  transform: translateY(-2px);
  border-color: color-mix(in srgb, var(--bcxm-main) 35%, var(--border));
  box-shadow: var(--shadow-lg);
}

.post-pagination-item.next { text-align: right; }
.post-pagination-item.is-empty { visibility: hidden; }
.pp-label { color: var(--bcxm-main); font-size: 12px; }
.pp-title { color: var(--font-high); font-size: 14px; font-weight: 500; line-height: 1.5; }

.pp-title {
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.related-post { padding: 22px 24px; }

.related-list { margin: 0; padding: 0; list-style: none; display: flex; flex-direction: column; gap: 2px; }

.related-list a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 9px 10px;
  border-radius: 8px;
  transition: background-color .2s var(--ease), color .2s var(--ease);
}

.related-list a:hover { background: var(--bg-soft); color: var(--bcxm-main); }
.related-title { font-size: 14px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.related-list time { flex: none; color: var(--font-mute); font-size: 12px; font-variant-numeric: tabular-nums; }

@media (max-width: 640px) {
  .post-full,
  .page-full { padding: 22px 18px; }
  .post-title { font-size: 22px; }
  .post-pagination { grid-template-columns: 1fr; }
  .post-pagination-item.is-empty { display: none; }
}

/* ---------- 16. 移动端目录浮层 ---------- */
@media (max-width: 900px) {
  body.toc-mobile-open .aside-content {
    display: block;
    position: fixed;
    right: 14px;
    bottom: 78px;
    z-index: 220;
    width: min(320px, calc(100vw - 28px));
  }

  body.toc-mobile-open .aside-sticky {
    position: static;
    display: block;
  }

  body.toc-mobile-open .aside-sticky > .card-widget:not(#card-toc) {
    display: none;
  }

  body.toc-mobile-open #card-toc {
    margin: 0;
    max-height: 56vh;
    overflow-y: auto;
    box-shadow: var(--shadow-pop);
    animation: toc-pop .22s var(--ease);
  }

  body.toc-mobile-open #card-toc .toc-body { max-height: none; }
  #toc-toggle { display: grid; }
}

@media (min-width: 901px) {
  #toc-toggle { display: none !important; }
}

@keyframes toc-pop {
  from { opacity: 0; transform: translateY(8px) scale(.98); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

/* ---------- 17. 友链网格（友链页使用） ---------- */
.friend-links {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 14px;
  margin: 4px 0 26px;
}

.friend-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-soft);
  transition: transform .25s var(--ease), box-shadow .25s var(--ease),
    border-color .25s var(--ease), background-color .25s var(--ease);
}

/* 更高优先级：抵消正文里 a 标签的虚线下划线 */
.article-content .friend-link { border: 1px solid var(--border); }

.article-content .friend-link:hover,
.friend-link:hover {
  transform: translateY(-3px);
  background: var(--card);
  border-color: color-mix(in srgb, var(--bcxm-main) 40%, var(--border));
  box-shadow: var(--shadow-lg);
}

.friend-avatar {
  display: grid;
  place-items: center;
  flex: none;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--bcxm-main), var(--bcxm-paginator));
  color: #fff;
  font-size: 17px;
  font-weight: 700;
}

.friend-meta { display: flex; flex-direction: column; min-width: 0; }
.friend-name { color: var(--font-high); font-size: 14.5px; font-weight: 600; }
.friend-desc {
  color: var(--font-mute);
  font-size: 12.5px;
  line-height: 1.5;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}