/* ============================================================
   岐黄书房 · 古风主题样式
   主调：宣纸底色 / 墨色 / 朱红 / 黛青
   ============================================================ */

/* ---------- 1. 变量与设计令牌 ---------- */
:root {
  /* 主色系 */
  --color-bg:        #f4ebd0;   /* 宣纸 */
  --color-bg-soft:   #faf6ec;   /* 米白 */
  --color-bg-elev:   #fdf9ec;   /* 抬升 */
  --color-fg:        #2b1d14;   /* 墨黑 */
  --color-fg-soft:   #4a3a2a;   /* 墨色 */
  --color-fg-mute:   #5a5249;   /* 灰墨 */
  --color-accent:    #a82a2a;   /* 朱红 */
  --color-accent-d:  #c03a3a;   /* 印章红 */
  --color-secondary: #2d4a4f;   /* 黛青 */
  --color-tertiary:  #7a5c3a;   /* 赭石 */
  --color-line:      #d8c8a8;   /* 边线 */
  --color-line-soft: #e8dcc0;
  --color-shadow:    rgba(43, 29, 20, 0.12);
  --color-shadow-strong: rgba(43, 29, 20, 0.22);

  /* 字体 */
  --font-kai:        "Ma Shan Zheng", "KaiTi", "STKaiti", "Kaiti SC", "STZhongsong", "Microsoft YaHei", serif;
  --font-song:       "Noto Serif SC", "Songti SC", "STSong", "SimSun", "FangSong", "STFangsong", serif;
  --font-cursive:    "Long Cang", "Ma Shan Zheng", "KaiTi", cursive;
  --font-body:       var(--font-song);
  --font-display:    var(--font-kai);

  /* 尺寸 */
  --container:       72rem;
  --container-narrow: 44rem;
  --radius:          4px;
  --radius-lg:       8px;
  --gutter:          1.5rem;

  /* 节奏 */
  --ease:            cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---------- 2. 暗色主题 ----------
   单一来源：[data-theme="dark"]。_includes/head.html 顶部的内联脚本会在
   CSS 加载前从 localStorage / prefers-color-scheme 注入 [data-theme]，
   因此系统级暗色偏好由 JS 路径处理；本块只负责覆盖变量值。
   旧版原本有 [data-theme="dark"] 与 @media (prefers-color-scheme: dark) 两块
   内容完全相同的代码（TC-027 重复），此处合并为单一定义。
*/
[data-theme="dark"] {
  --color-bg:        #1a1410;
  --color-bg-soft:   #221a14;
  --color-bg-elev:   #2a2018;
  --color-fg:        #e8dcc0;
  --color-fg-soft:   #c8b894;
  --color-fg-mute:   #9a8a70;
  --color-accent:    #e26060;
  --color-accent-d:  #ee7070;
  --color-secondary: #6ba0a8;
  --color-tertiary:  #b89870;
  --color-line:      #3a2e22;
  --color-line-soft: #2e2418;
  --color-shadow:    rgba(0, 0, 0, 0.4);
  --color-shadow-strong: rgba(0, 0, 0, 0.6);
}

/* ---------- 3. 基础重置 ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  font-size: 18px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-rendering: optimizeLegibility;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.95;
  color: var(--color-fg);
  background-color: var(--color-bg);
  /* 宣纸纹理：双层渐变模拟 */
  background-image:
    radial-gradient(circle at 20% 30%, rgba(168, 42, 42, 0.025) 0, transparent 40%),
    radial-gradient(circle at 80% 70%, rgba(45, 74, 79, 0.03) 0, transparent 40%),
    repeating-linear-gradient(45deg, transparent 0, transparent 40px, rgba(122, 92, 58, 0.015) 40px, rgba(122, 92, 58, 0.015) 41px);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: background-color 0.3s var(--ease), color 0.3s var(--ease);
}

main {
  flex: 1 0 auto;
  padding: 2.5rem 0 4.5rem;
}

img,
svg {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--color-accent);
  text-decoration: underline;
  text-decoration-color: color-mix(in srgb, var(--color-accent) 35%, transparent);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color 0.2s, text-decoration-color 0.2s;
}
a:hover {
  color: var(--color-accent-d);
  text-decoration-color: currentColor;
}

::selection {
  background: var(--color-accent);
  color: var(--color-bg-soft);
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  padding: 0.5rem 1rem;
  background: var(--color-accent);
  color: var(--color-bg-soft);
  z-index: 9999;
}
.skip-link:focus {
  left: 1rem;
  top: 1rem;
}

/* ---------- 4. 布局容器 ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
}
.container--narrow {
  max-width: var(--container-narrow);
}

/* ---------- 5. 排版与文字 ---------- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  color: var(--color-fg);
  line-height: 1.4;
  margin: 2.4rem 0 1.2rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}
h1 { font-size: 2.6rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.55rem; }
h4 { font-size: 1.25rem; }

p { margin: 0 0 1.4rem; }

blockquote {
  margin: 1.8rem 0;
  padding: 1.2rem 1.6rem;
  border-left: 4px double var(--color-accent);
  background: var(--color-bg-soft);
  color: var(--color-fg-soft);
  font-family: var(--font-kai);
  font-size: 1.1rem;
  line-height: 1.95;
  font-style: normal;
  position: relative;
}
blockquote::before {
  content: "「";
  position: absolute;
  left: 0.4rem;
  top: -0.4rem;
  font-size: 2.4rem;
  color: var(--color-accent);
  font-family: var(--font-kai);
  opacity: 0.3;
}

code {
  font-family: "SFMono-Regular", "Cascadia Mono", Consolas, monospace;
  font-size: 0.92em;
  background: var(--color-bg-soft);
  padding: 0.15em 0.4em;
  border-radius: 3px;
  border: 1px solid var(--color-line-soft);
  color: var(--color-secondary);
}

pre {
  margin: 1.5rem 0;
  padding: 1rem 1.2rem;
  background: var(--color-bg-soft);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  overflow-x: auto;
  line-height: 1.55;
}
pre code {
  background: transparent;
  border: 0;
  padding: 0;
  color: var(--color-fg);
  font-size: 0.9rem;
}

hr {
  border: 0;
  height: 1px;
  background: linear-gradient(to right, transparent, var(--color-line), transparent);
  margin: 3rem 0;
}

ul, ol { padding-left: 1.8rem; }
li { margin: 0.4rem 0; }

table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.8rem 0;
  font-size: 1rem;
}
th, td {
  text-align: left;
  padding: 0.8rem 1rem;
  border-bottom: 1px solid var(--color-line);
}
th {
  background: var(--color-bg-soft);
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--color-fg-soft);
}

/* ---------- 6. 站点头部 ---------- */
.site-header {
  background: var(--color-bg-soft);
  border-bottom: 1px solid var(--color-line);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  background: color-mix(in srgb, var(--color-bg-soft) 92%, transparent);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-top: 0.9rem;
  padding-bottom: 0.9rem;
}

.site-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--color-fg);
  border: 0;
}
.site-brand:hover { color: var(--color-accent); }

.site-brand__seal {
  display: inline-flex;
  color: var(--color-accent);
}

.site-brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}
.site-brand__title {
  font-family: var(--font-display);
  font-size: 1.55rem;
  font-weight: 700;
  letter-spacing: 0.1em;
}
.site-brand__sub {
  font-size: 0.82rem;
  color: var(--color-fg-mute);
  letter-spacing: 0.08em;
  margin-top: 2px;
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-nav__link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.55rem 1rem;
  color: var(--color-fg-soft);
  border-radius: var(--radius);
  font-size: 1.05rem;
  text-decoration: none;
  border: 0;
  position: relative;
  transition: color 0.2s, background 0.2s;
}
.site-nav__link::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 4px;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width 0.25s var(--ease), left 0.25s var(--ease);
}
.site-nav__link:hover {
  color: var(--color-accent);
  background: transparent;
  border-bottom: 0;
}
.site-nav__link:hover::after,
.site-nav__link.is-active::after {
  width: calc(100% - 1.7rem);
  left: 0.85rem;
}
.site-nav__link.is-active {
  color: var(--color-accent);
  font-weight: 600;
}

.site-nav__icon { font-size: 1rem; opacity: 0.7; }

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  background: transparent;
  border: 1px solid var(--color-line);
  border-radius: 50%;
  color: var(--color-fg-soft);
  cursor: pointer;
  font-size: 1.15rem;
  position: relative;
  transition: all 0.2s;
  margin-left: 0.5rem;
}
.theme-toggle:hover {
  background: var(--color-accent);
  color: var(--color-bg-soft);
  border-color: var(--color-accent);
  transform: rotate(20deg);
}
.theme-toggle__sun,
.theme-toggle__moon { position: absolute; transition: opacity 0.3s, transform 0.3s; }
[data-theme="light"] .theme-toggle__sun  { opacity: 1; transform: scale(1) rotate(0); }
[data-theme="light"] .theme-toggle__moon { opacity: 0; transform: scale(0) rotate(-90deg); }
[data-theme="dark"]  .theme-toggle__sun  { opacity: 0; transform: scale(0) rotate(90deg); }
[data-theme="dark"]  .theme-toggle__moon { opacity: 1; transform: scale(1) rotate(0); }

/* 移动端菜单 */
.nav-toggle {
  display: none;
  width: 2.6rem;
  height: 2.6rem;
  background: transparent;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  cursor: pointer;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  padding: 0;
}
.nav-toggle span {
  display: block;
  width: 18px;
  height: 1.5px;
  background: var(--color-fg);
  transition: transform 0.25s, opacity 0.25s;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(5.5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-5.5px) rotate(-45deg); }

@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-bg-soft);
    border-bottom: 1px solid var(--color-line);
    box-shadow: 0 6px 12px var(--color-shadow);
    transform: translateY(-10px);
    opacity: 0;
    pointer-events: none;
    transition: all 0.25s var(--ease);
  }
  .site-nav.is-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    padding: 0.8rem;
    gap: 0.2rem;
  }
  .site-nav__link {
    padding: 0.7rem 0.9rem;
    justify-content: flex-start;
  }
  .site-nav__link::after { display: none; }
  .site-nav__item--tools { margin-top: 0.4rem; }
}

/* ---------- 7. Hero / 章节标题 ---------- */
.section {
  padding: 3.5rem 0 2.5rem;
}
.section--muted {
  background: var(--color-bg-soft);
  border-top: 1px solid var(--color-line-soft);
  border-bottom: 1px solid var(--color-line-soft);
  margin-top: 3.5rem;
}

.section__header { text-align: center; margin-bottom: 3rem; }
.section__title {
  font-size: 2.2rem;
  font-family: var(--font-display);
  letter-spacing: 0.1em;
  margin: 0 0 0.7rem;
  position: relative;
  display: inline-block;
}
.section__title span {
  display: inline-block;
  padding: 0 1.2rem;
  position: relative;
}
.section__title span::before,
.section__title span::after {
  content: "";
  position: absolute;
  top: 50%;
  width: 28px;
  height: 1px;
  background: var(--color-accent);
}
.section__title span::before { right: 100%; }
.section__title span::after  { left: 100%; }
.section__lead {
  color: var(--color-fg-mute);
  font-size: 1.15rem;
  max-width: 38rem;
  margin: 0 auto;
  font-family: var(--font-kai);
  letter-spacing: 0.05em;
}

/* Hero */
.hero {
  position: relative;
  padding: 5.5rem 0 3.5rem;
  text-align: center;
  overflow: hidden;
}
.hero__inner { position: relative; z-index: 1; }
.hero__eyebrow {
  color: var(--color-accent);
  font-family: var(--font-kai);
  letter-spacing: 0.3em;
  font-size: 1.05rem;
  margin: 0 0 1.2rem;
}
.hero__title {
  font-family: var(--font-kai);
  font-size: clamp(3rem, 7vw, 4.8rem);
  letter-spacing: 0.25em;
  margin: 0 0 0.7rem;
  color: var(--color-fg);
  text-indent: 0.25em;
  font-weight: 700;
}
.hero__subtitle {
  font-family: var(--font-kai);
  font-size: 1.45rem;
  color: var(--color-fg-soft);
  letter-spacing: 0.15em;
  margin: 0 0 1.6rem;
}
.hero__tagline {
  font-family: var(--font-cursive);
  font-size: 1.7rem;
  color: var(--color-secondary);
  margin: 0;
  letter-spacing: 0.1em;
}
.hero__seal {
  position: absolute;
  right: 5%;
  top: 10%;
  width: 7.5rem;
  height: 7.5rem;
  background: var(--color-accent);
  color: var(--color-bg-soft);
  font-family: var(--font-kai);
  font-size: 2rem;
  letter-spacing: 0.2em;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  transform: rotate(8deg);
  box-shadow: 0 4px 16px var(--color-shadow-strong);
  opacity: 0.88;
}
.hero__seal::before {
  content: "";
  position: absolute;
  inset: 4px;
  border: 1px solid currentColor;
  border-radius: 3px;
  opacity: 0.4;
}
.hero__seal span { position: relative; z-index: 1; }
@media (max-width: 600px) {
  .hero__seal { width: 5rem; height: 5rem; font-size: 1.3rem; }
}
.hero__divider {
  margin: 2rem auto 0;
  max-width: 12rem;
  color: var(--color-accent);
  opacity: 0.6;
}

/* ---------- 8. 文章卡片网格 ---------- */
.post-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(22rem, 1fr));
  gap: 1.8rem;
  margin: 2.5rem 0;
}

.post-card {
  background: var(--color-bg-elev);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease), border-color 0.3s;
  position: relative;
}
.post-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent 92%, var(--color-accent) 92%, var(--color-accent) 94%, transparent 94%);
  opacity: 0;
  transition: opacity 0.3s;
  pointer-events: none;
  z-index: 2;
}
.post-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 24px var(--color-shadow);
  border-color: var(--color-accent);
}
.post-card:hover::before { opacity: 0.5; }

.post-card__cover {
  display: block;
  aspect-ratio: 16/9;
  background: var(--color-bg-soft);
  position: relative;
  overflow: hidden;
  border: 0;
}
.post-card__cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s var(--ease);
}
.post-card:hover .post-card__cover img { transform: scale(1.05); }

.post-card__placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--cat-color) 12%, var(--color-bg-soft)) 0%, color-mix(in srgb, var(--cat-color) 28%, var(--color-bg-soft)) 100%);
  color: var(--cat-color);
  font-family: var(--font-kai);
  position: relative;
}
.post-card__placeholder::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 30%, rgba(255,255,255,0.15) 0, transparent 50%),
    repeating-linear-gradient(45deg, transparent 0, transparent 20px, rgba(0,0,0,0.02) 20px, rgba(0,0,0,0.02) 21px);
}
.post-card__placeholder-icon {
  font-size: 3rem;
  line-height: 1;
  position: relative;
  z-index: 1;
}
.post-card__placeholder-name {
  font-size: 0.95rem;
  margin-top: 0.5rem;
  letter-spacing: 0.2em;
  position: relative;
  z-index: 1;
}

.post-card__body {
  padding: 1.2rem 1.3rem 1.3rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.post-card__cat {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  align-self: flex-start;
  padding: 0.25rem 0.75rem;
  font-size: 0.88rem;
  color: var(--cat-color, var(--color-accent));
  background: color-mix(in srgb, var(--cat-color, var(--color-accent)) 10%, transparent);
  border: 1px solid color-mix(in srgb, var(--cat-color, var(--color-accent)) 30%, transparent);
  border-radius: 100px;
  margin-bottom: 0.8rem;
  font-family: var(--font-kai);
  letter-spacing: 0.1em;
  text-decoration: none;
  border-bottom: 1px solid color-mix(in srgb, var(--cat-color, var(--color-accent)) 30%, transparent);
}
.post-card__cat:hover {
  background: color-mix(in srgb, var(--cat-color, var(--color-accent)) 18%, transparent);
  border-color: var(--cat-color, var(--color-accent));
}

.post-card__title {
  font-size: 1.4rem;
  margin: 0 0 0.6rem;
  line-height: 1.45;
  font-family: var(--font-display);
}
.post-card__title a {
  color: var(--color-fg);
  text-decoration: none;
}
.post-card__title a:hover { color: var(--color-accent); }

.post-card__subtitle {
  font-family: var(--font-kai);
  color: var(--color-fg-mute);
  font-size: 1.05rem;
  margin: 0 0 0.7rem;
  letter-spacing: 0.05em;
}

.post-card__excerpt {
  color: var(--color-fg-soft);
  font-size: 1rem;
  line-height: 1.8;
  margin: 0 0 1.2rem;
  flex: 1;
}

.post-card__meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  color: var(--color-fg-mute);
  padding-top: 0.9rem;
  border-top: 1px dashed var(--color-line);
}
.post-card__dot { opacity: 0.5; }

/* ---------- 9. 分类卡片（首页） ---------- */
.category-grid {
  list-style: none;
  padding: 0;
  margin: 2.5rem 0 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(17rem, 1fr));
  gap: 1.4rem;
}
.category-card {
  background: var(--color-bg-elev);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  transition: all 0.3s var(--ease);
  position: relative;
  overflow: hidden;
}
.category-card:hover {
  border-color: var(--cat-color);
  transform: translateY(-3px);
  box-shadow: 0 8px 20px var(--color-shadow);
}
.category-card__link {
  display: block;
  padding: 1.8rem 1.5rem 1.5rem;
  color: var(--color-fg);
  text-decoration: none;
  text-align: left;
  position: relative;
}
.category-card__link:hover { color: var(--color-fg); }
.category-card__link::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--cat-color);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 0.3s var(--ease);
}
.category-card:hover .category-card__link::before { transform: scaleY(1); }

.category-card__icon {
  display: inline-block;
  font-family: var(--font-kai);
  font-size: 2.2rem;
  color: var(--cat-color);
  margin-bottom: 0.7rem;
  line-height: 1;
}
.category-card__name {
  display: block;
  font-family: var(--font-display);
  font-size: 1.45rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  margin-bottom: 0.4rem;
}
.category-card__count {
  display: block;
  font-size: 0.92rem;
  color: var(--color-fg-mute);
  margin-bottom: 0.5rem;
  letter-spacing: 0.05em;
}
.category-card__desc {
  display: block;
  font-size: 1rem;
  color: var(--color-fg-soft);
  line-height: 1.75;
  font-family: var(--font-kai);
}

/* ---------- 10. 文章详情页 ---------- */
.post__header {
  text-align: center;
  padding: 3rem 0 2.2rem;
  border-bottom: 1px dashed var(--color-line);
  margin-bottom: 3rem;
  position: relative;
}
.post__header::after {
  content: "";
  position: absolute;
  bottom: -8px;
  left: 50%;
  transform: translateX(-50%);
  width: 12px;
  height: 12px;
  background: var(--color-accent);
  border-radius: 50%;
  box-shadow: 0 0 0 4px var(--color-bg);
}
.post__category {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.35rem 1.1rem;
  font-size: 0.95rem;
  color: var(--cat-color, var(--color-accent));
  background: color-mix(in srgb, var(--cat-color, var(--color-accent)) 10%, transparent);
  border: 1px solid color-mix(in srgb, var(--cat-color, var(--color-accent)) 30%, transparent);
  border-radius: 100px;
  margin-bottom: 1.1rem;
  font-family: var(--font-kai);
  letter-spacing: 0.15em;
  text-decoration: none;
  border-bottom: 1px solid color-mix(in srgb, var(--cat-color, var(--color-accent)) 30%, transparent);
}
.post__title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4.5vw, 2.9rem);
  margin: 0.6rem 0 0.6rem;
  letter-spacing: 0.05em;
  line-height: 1.4;
}
.post__subtitle {
  font-family: var(--font-kai);
  color: var(--color-fg-mute);
  font-size: 1.25rem;
  margin: 0.4rem 0 1.6rem;
  letter-spacing: 0.1em;
}

.post-meta {
  display: inline-flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1.4rem;
  color: var(--color-fg-mute);
  font-size: 0.95rem;
}
.post-meta__item {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}
.post-meta__icon { color: var(--color-accent); }

.post__body {
  max-width: var(--container-narrow);
  font-size: 1.15rem;
  line-height: 2.1;
}
.post__body h2,
.post__body h3,
.post__body h4 {
  margin-top: 2.8rem;
  margin-bottom: 1.2rem;
  position: relative;
  padding-left: 1.3rem;
}
.post__body h2::before,
.post__body h3::before {
  content: "▎";
  position: absolute;
  left: 0;
  color: var(--color-accent);
}
.post__body p { margin: 0 0 1.5rem; }
.post__body img {
  margin: 2rem auto;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  box-shadow: 0 4px 12px var(--color-shadow);
}
.post__body figure { margin: 2rem 0; text-align: center; }
.post__body figcaption {
  color: var(--color-fg-mute);
  font-size: 0.88rem;
  font-family: var(--font-kai);
  margin-top: 0.5rem;
}

.post__footer {
  max-width: var(--container-narrow);
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px dashed var(--color-line);
}
.post__tags-label {
  color: var(--color-fg-mute);
  font-family: var(--font-kai);
  letter-spacing: 0.1em;
  margin-right: 0.4rem;
}
.tag-chip {
  display: inline-block;
  padding: 0.3rem 0.8rem;
  margin: 0.25rem 0.35rem 0.25rem 0;
  font-size: 0.95rem;
  color: var(--color-secondary);
  background: color-mix(in srgb, var(--color-secondary) 8%, transparent);
  border: 1px solid color-mix(in srgb, var(--color-secondary) 25%, transparent);
  border-radius: 100px;
  text-decoration: none;
  border-bottom: 1px solid color-mix(in srgb, var(--color-secondary) 25%, transparent);
}
.tag-chip:hover {
  color: var(--color-bg-soft);
  background: var(--color-secondary);
  border-color: var(--color-secondary);
}

.post__nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 2.5rem;
}
.post__nav-link {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  padding: 1.1rem 1.4rem;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  color: var(--color-fg-soft);
  background: var(--color-bg-elev);
  text-decoration: none;
  border-bottom: 1px solid var(--color-line);
  transition: all 0.2s;
}
.post__nav-link:not(.post__nav-link--disabled):hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
  transform: translateY(-2px);
}
.post__nav-link--next { text-align: right; justify-content: flex-end; }
.post__nav-link--disabled { opacity: 0.4; cursor: not-allowed; }
.post__nav-arrow { font-size: 1.5rem; color: var(--color-accent); }
.post__nav-text { display: flex; flex-direction: column; gap: 3px; }
.post__nav-hint {
  font-size: 0.88rem;
  color: var(--color-fg-mute);
  letter-spacing: 0.1em;
}
.post__nav-title { font-family: var(--font-kai); font-size: 1.1rem; }
@media (max-width: 600px) {
  .post__nav { grid-template-columns: 1fr; }
  .post__nav-link--next { text-align: left; justify-content: flex-start; flex-direction: row-reverse; }
}

.post__back {
  text-align: center;
  margin-top: 2rem;
}

.btn,
.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.6rem;
  font-family: var(--font-kai);
  letter-spacing: 0.1em;
  border-radius: var(--radius);
  transition: all 0.2s;
  border: 1px solid var(--color-accent);
  cursor: pointer;
  font-size: 1.05rem;
  text-decoration: none;
}
.btn {
  background: var(--color-accent);
  color: var(--color-bg-soft);
}
.btn:hover {
  background: var(--color-accent-d);
  border-color: var(--color-accent-d);
  color: var(--color-bg-soft);
}
.btn-ghost {
  background: transparent;
  color: var(--color-accent);
  margin-left: 0.6rem;
}
.btn-ghost:hover {
  background: var(--color-accent);
  color: var(--color-bg-soft);
}

/* ---------- 11. 分页导航 ---------- */
.pagination {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  margin: 3.5rem 0 0.5rem;
  font-family: var(--font-kai);
}
.pagination__pages {
  display: flex;
  align-items: center;
  list-style: none;
  padding: 0;
  margin: 0;
  gap: 0.4rem;
  flex-wrap: wrap;
  justify-content: center;
}
.pagination__page,
.pagination__ellipsis {
  min-width: 2.8rem;
  height: 2.8rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 0.8rem;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  color: var(--color-fg-soft);
  background: var(--color-bg-elev);
  font-size: 1.05rem;
  letter-spacing: 0.05em;
  text-decoration: none;
  border-bottom: 1px solid var(--color-line);
  transition: all 0.2s;
}
.pagination__page:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
  transform: translateY(-1px);
}
.pagination__page.is-current {
  background: var(--color-accent);
  color: var(--color-bg-soft);
  border-color: var(--color-accent);
  font-weight: 600;
  cursor: default;
}
.pagination__ellipsis {
  border: 0;
  background: transparent;
  color: var(--color-fg-mute);
}
.pagination__link--edge {
  height: 2.8rem;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0 1.1rem;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  color: var(--color-fg-soft);
  background: var(--color-bg-elev);
  text-decoration: none;
  border-bottom: 1px solid var(--color-line);
  font-size: 1.05rem;
}
.pagination__link--edge:not(.is-disabled):hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
}
.pagination__link--edge.is-disabled {
  opacity: 0.4;
  cursor: not-allowed;
}
@media (max-width: 480px) {
  .pagination__edge-text { display: none; }
}
.pagination__summary {
  width: 100%;
  text-align: center;
  margin: 1rem 0 0;
  color: var(--color-fg-mute);
  font-size: 0.95rem;
  letter-spacing: 0.1em;
}

/* ---------- 12. 归档页 ---------- */
.archive-year {
  margin: 3rem 0;
}
.archive-year__title {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 1.8rem;
  color: var(--color-fg);
  border-bottom: 2px solid var(--color-accent);
  padding-bottom: 0.2rem;
  margin-bottom: 1.2rem;
  letter-spacing: 0.1em;
}
.archive-list { list-style: none; padding: 0; margin: 0; }
.archive-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.7rem 0.5rem;
  border-bottom: 1px dashed var(--color-line-soft);
  transition: background 0.2s;
}
.archive-item:hover { background: var(--color-bg-soft); }
.archive-item__date {
  flex: 0 0 4.5rem;
  color: var(--color-fg-mute);
  font-family: var(--font-mono, "SFMono-Regular", monospace);
  font-size: 0.95rem;
  letter-spacing: 0.05em;
}
.archive-item__cat {
  flex: 0 0 auto;
  padding: 0.15rem 0.65rem;
  font-size: 0.85rem;
  border-radius: 100px;
  color: var(--cat-color);
  background: color-mix(in srgb, var(--cat-color) 10%, transparent);
  border: 1px solid color-mix(in srgb, var(--cat-color) 30%, transparent);
  font-family: var(--font-kai);
  letter-spacing: 0.05em;
}
.archive-item__link {
  flex: 1;
  color: var(--color-fg-soft);
  text-decoration: none;
  font-family: var(--font-kai);
  font-size: 1.05rem;
  letter-spacing: 0.05em;
}
.archive-item__link:hover { color: var(--color-accent); }

@media (max-width: 600px) {
  .archive-item { flex-wrap: wrap; gap: 0.4rem; }
  .archive-item__link { flex: 1 0 100%; order: 3; }
}

/* ---------- 13. 分类总览页 ---------- */
.category-list { list-style: none; padding: 0; margin: 0; }
.category-block {
  margin: 2.8rem 0;
  padding: 1.8rem 2rem;
  background: var(--color-bg-elev);
  border: 1px solid var(--color-line);
  border-left: 4px solid var(--cat-color);
  border-radius: var(--radius);
}
.category-block__title {
  font-family: var(--font-display);
  font-size: 1.7rem;
  margin: 0 0 0.5rem;
  color: var(--color-fg);
  letter-spacing: 0.1em;
  display: flex;
  align-items: baseline;
  gap: 0.4rem;
}
.category-block__icon {
  font-family: var(--font-kai);
  color: var(--cat-color);
  font-size: 1.4rem;
}
.category-block__count { color: var(--color-fg-mute); font-size: 1rem; }
.category-block__desc {
  color: var(--color-fg-mute);
  font-family: var(--font-kai);
  font-size: 1.05rem;
  margin: 0 0 1.1rem;
}
.category-block__more,
.category-block__empty { color: var(--color-fg-mute); font-size: 0.95rem; }

.post-list-wrap { margin-top: 1rem; }
.post-list { list-style: none; padding: 0; margin: 1.5rem 0; }
.post-list__item {
  padding: 0.7rem 0;
  border-bottom: 1px dashed var(--color-line-soft);
  display: flex;
  align-items: baseline;
  gap: 1rem;
}
.post-list__date {
  flex: 0 0 7rem;
  color: var(--color-fg-mute);
  font-family: "SFMono-Regular", monospace;
  font-size: 0.92rem;
}
.post-list__link {
  color: var(--color-fg-soft);
  text-decoration: none;
  font-family: var(--font-kai);
  font-size: 1.05rem;
  letter-spacing: 0.05em;
}
.post-list__link:hover { color: var(--color-accent); }
.post-list__item--rich {
  display: block;
  padding: 1.1rem 0;
}
.post-list__item--rich .post-list__date { display: block; flex: none; margin-bottom: 0.4rem; }
.post-list__item--rich .post-list__link { font-size: 1.2rem; font-family: var(--font-display); }
.post-list__excerpt {
  color: var(--color-fg-mute);
  font-size: 0.98rem;
  margin: 0.5rem 0 0;
  line-height: 1.7;
}

/* ---------- 14. 标签云 ---------- */
.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  justify-content: center;
  margin-top: 2rem;
}
.tag-cloud__item {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 1rem;
  border: 1px solid var(--color-line);
  border-radius: 100px;
  color: var(--color-fg-soft);
  background: var(--color-bg-elev);
  font-size: 1.05rem;
  font-family: var(--font-kai);
  letter-spacing: 0.05em;
  text-decoration: none;
  border-bottom: 1px solid var(--color-line);
  transition: all 0.2s;
}
.tag-cloud__count {
  font-size: 0.82rem;
  background: var(--color-line-soft);
  color: var(--color-fg-mute);
  padding: 0 0.45rem;
  border-radius: 100px;
  min-width: 1.5rem;
  text-align: center;
}
.tag-cloud__item {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.35rem 0.9rem;
  border: 1px solid var(--color-line);
  border-radius: 100px;
  color: var(--color-fg-soft);
  background: var(--color-bg-elev);
  font-size: 0.95rem;
  font-family: var(--font-kai);
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--color-line);
  transition: all 0.2s;
}
.tag-cloud__item:hover {
  background: var(--color-accent);
  color: var(--color-bg-soft);
  border-color: var(--color-accent);
  transform: translateY(-1px);
}
.tag-cloud__count {
  font-size: 0.75rem;
  background: var(--color-line-soft);
  color: var(--color-fg-mute);
  padding: 0 0.4rem;
  border-radius: 100px;
  min-width: 1.4rem;
  text-align: center;
}
.tag-cloud__item:hover .tag-cloud__count {
  background: var(--color-accent-d);
  color: var(--color-bg-soft);
}

/* ---------- 15. 搜索 ---------- */
.search-hint {
  text-align: center;
  color: var(--color-fg-mute);
  font-size: 0.98rem;
  font-family: var(--font-kai);
  margin: 0 0 2rem;
}
.search-box__icon {
  position: absolute;
  left: 1.2rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-fg-mute);
  font-size: 1.25rem;
}
.search-box__input {
  width: 100%;
  padding: 1.05rem 3.2rem 1.05rem 3rem;
  font-size: 1.15rem;
  font-family: var(--font-kai);
  background: var(--color-bg-elev);
  border: 2px solid var(--color-line);
  border-radius: 100px;
  color: var(--color-fg);
  letter-spacing: 0.05em;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.search-box__input:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--color-accent) 12%, transparent);
}
.search-box__clear {
  position: absolute;
  right: 0.6rem;
  top: 50%;
  transform: translateY(-50%);
  width: 2rem;
  height: 2rem;
  border: 0;
  background: transparent;
  color: var(--color-fg-mute);
  font-size: 1.4rem;
  cursor: pointer;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
}
.search-box__clear:hover { background: var(--color-accent); color: var(--color-bg-soft); }

.search-hint {
  text-align: center;
  color: var(--color-fg-mute);
  font-size: 0.9rem;
  font-family: var(--font-kai);
  margin: 0 0 2rem;
}

.search-results { min-height: 6rem; }
.search-results__stats {
  color: var(--color-fg-mute);
  font-size: 1rem;
  font-family: var(--font-kai);
  margin-bottom: 1.2rem;
  letter-spacing: 0.1em;
}
.search-results__list { list-style: none; padding: 0; margin: 0; }
.search-result {
  padding: 1.4rem 1.6rem;
  margin-bottom: 1.2rem;
  background: var(--color-bg-elev);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  border-left: 3px solid var(--color-accent);
  transition: all 0.2s;
}
.search-result:hover {
  border-color: var(--color-accent);
  transform: translateX(4px);
}
.search-result__title {
  font-family: var(--font-display);
  font-size: 1.4rem;
  margin: 0 0 0.4rem;
}
.search-result__title a { color: var(--color-fg); text-decoration: none; }
.search-result__title a:hover { color: var(--color-accent); }
.search-result__title mark {
  background: color-mix(in srgb, var(--color-accent) 25%, transparent);
  color: var(--color-fg);
  padding: 0 0.15em;
  border-radius: 2px;
}
.search-result__meta {
  color: var(--color-fg-mute);
  font-size: 0.92rem;
  margin-bottom: 0.6rem;
  font-family: var(--font-kai);
  letter-spacing: 0.05em;
}
.search-result__excerpt {
  color: var(--color-fg-soft);
  font-size: 1.05rem;
  line-height: 1.8;
  margin: 0;
}
.search-result__excerpt mark {
  background: color-mix(in srgb, var(--color-accent) 20%, transparent);
  color: var(--color-fg);
  padding: 0 0.15em;
  border-radius: 2px;
}
.search-result__cat {
  display: inline-block;
  padding: 0.1rem 0.5rem;
  font-size: 0.75rem;
  border-radius: 100px;
  color: var(--color-accent);
  background: color-mix(in srgb, var(--color-accent) 10%, transparent);
  border: 1px solid color-mix(in srgb, var(--color-accent) 30%, transparent);
  font-family: var(--font-kai);
}
.empty-tip {
  text-align: center;
  color: var(--color-fg-mute);
  font-family: var(--font-kai);
  padding: 2rem;
  letter-spacing: 0.1em;
}

.back-tip {
  text-align: center;
  margin-top: 3rem;
  font-family: var(--font-kai);
  color: var(--color-fg-mute);
}

/* ---------- 16. 普通 page（about 等） ---------- */
.page__header {
  text-align: center;
  padding: 3.5rem 0 2.2rem;
  border-bottom: 1px dashed var(--color-line);
  margin-bottom: 3rem;
  position: relative;
}
.page__title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.7rem);
  letter-spacing: 0.15em;
  margin: 0;
}
.page__subtitle {
  font-family: var(--font-kai);
  color: var(--color-fg-mute);
  font-size: 1.25rem;
  margin: 0.6rem 0 0;
  letter-spacing: 0.1em;
}
.page__body {
  max-width: var(--container-narrow);
  font-size: 1.15rem;
  line-height: 2.1;
}
.page__body h2 {
  margin-top: 2.5rem;
  padding-left: 1.2rem;
  position: relative;
  font-family: var(--font-display);
}
.page__body h2::before {
  content: "▎";
  position: absolute;
  left: 0;
  color: var(--color-accent);
}
.page__body h3 { font-family: var(--font-display); }

/* ---------- 17. 404 页 ---------- */
.error-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  text-align: center;
  padding: 3rem 1rem;
}
.error-page__inner { max-width: 36rem; }
.error-page__seal {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 9rem;
  height: 9rem;
  background: var(--color-accent);
  color: var(--color-bg-soft);
  font-family: var(--font-kai);
  font-size: 2.1rem;
  letter-spacing: 0.1em;
  border-radius: 8px;
  transform: rotate(-6deg);
  box-shadow: 0 6px 20px var(--color-shadow-strong);
  margin-bottom: 1.8rem;
  position: relative;
}
.error-page__title {
  font-family: var(--font-display);
  font-size: 2.6rem;
  margin: 0 0 1.2rem;
  letter-spacing: 0.1em;
}
.error-page__poem {
  font-family: var(--font-kai);
  font-size: 1.2rem;
  color: var(--color-fg-soft);
  line-height: 2.05;
  margin: 0 0 1.2rem;
}
.error-page__poem em { color: var(--color-accent); font-style: normal; }
.error-page__code {
  color: var(--color-fg-mute);
  font-family: "SFMono-Regular", monospace;
  font-size: 1rem;
  letter-spacing: 0.1em;
  margin: 0 0 2.2rem;
}
.error-page__inner { max-width: 32rem; }
.error-page__seal {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 8rem;
  height: 8rem;
  background: var(--color-accent);
  color: var(--color-bg-soft);
  font-family: var(--font-kai);
  font-size: 1.8rem;
  letter-spacing: 0.1em;
  border-radius: 8px;
  transform: rotate(-6deg);
  box-shadow: 0 6px 20px var(--color-shadow-strong);
  margin-bottom: 1.5rem;
  position: relative;
}
.error-page__seal::before {
  content: "";
  position: absolute;
  inset: 4px;
  border: 1px solid currentColor;
  border-radius: 5px;
  opacity: 0.4;
}
.error-page__title {
  font-family: var(--font-display);
  font-size: 2.2rem;
  margin: 0 0 1rem;
  letter-spacing: 0.1em;
}
.error-page__poem {
  font-family: var(--font-kai);
  font-size: 1.05rem;
  color: var(--color-fg-soft);
  line-height: 1.9;
  margin: 0 0 1rem;
}
.error-page__poem em { color: var(--color-accent); font-style: normal; }
.error-page__code {
  color: var(--color-fg-mute);
  font-family: "SFMono-Regular", monospace;
  font-size: 0.9rem;
  letter-spacing: 0.1em;
  margin: 0 0 2rem;
}
.error-page__actions { display: flex; gap: 0.5rem; justify-content: center; flex-wrap: wrap; }

/* ---------- 18. 站点底部 ---------- */
.site-footer {
  flex-shrink: 0;
  background: var(--color-bg-soft);
  border-top: 1px solid var(--color-line);
  padding: 3.5rem 0 0;
  margin-top: 4.5rem;
  color: var(--color-fg-soft);
  font-size: 1rem;
}
.site-footer__inner {
  display: grid;
  grid-template-columns: 1.5fr 2fr;
  gap: 3rem;
  align-items: start;
}
@media (max-width: 768px) {
  .site-footer__inner { grid-template-columns: 1fr; gap: 2rem; }
}
.site-footer__title {
  font-family: var(--font-display);
  font-size: 1.55rem;
  letter-spacing: 0.15em;
  margin: 0 0 0.8rem;
  color: var(--color-fg);
}
.site-footer__poem {
  font-family: var(--font-kai);
  color: var(--color-fg-soft);
  line-height: 2;
  margin: 0 0 0.5rem;
}
.site-footer__cite {
  color: var(--color-fg-mute);
  font-size: 0.9rem;
  margin: 0;
}
.site-footer__cols {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}
@media (max-width: 600px) {
  .site-footer__cols { grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
}
.site-footer__col h4 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  margin: 0 0 0.8rem;
  color: var(--color-fg);
  letter-spacing: 0.1em;
}
.site-footer__col ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
.site-footer__col li { margin: 0.45rem 0; }
.site-footer__col a {
  color: var(--color-fg-soft);
  text-decoration: none;
}
.site-footer__col a:hover { color: var(--color-accent); }
.site-footer__bottom {
  margin-top: 2.5rem;
  padding: 1.4rem 0;
  border-top: 1px solid var(--color-line-soft);
  text-align: center;
  font-size: 0.92rem;
  color: var(--color-fg-mute);
}
.site-footer__bottom a { color: var(--color-fg-soft); text-decoration: underline; }
.site-footer__bottom a:hover { color: var(--color-accent); }

/* ---------- 19. 焦点与无障碍 ---------- */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: 2px;
}

/* ---------- 20. 打印样式 ---------- */
@media print {
  .site-header, .site-footer, .pagination, .post__nav, .nav-toggle, .theme-toggle { display: none; }
  body { background: white; color: black; }
  a { color: black; text-decoration: underline; }
}

/* ---------- 21. 语言切换器 ---------- */
.lang-switcher {
  position: relative;
  display: inline-flex;
  align-items: center;
  margin-left: 0.5rem;
}
.lang-switcher__btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4rem 0.85rem;
  font-size: 1rem;
  background: transparent;
  border: 1px solid var(--color-line);
  border-radius: 100px;
  color: var(--color-fg-soft);
  cursor: pointer;
  font-family: var(--font-kai);
  letter-spacing: 0.05em;
  transition: all 0.2s;
}
.lang-switcher__btn:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}
.lang-switcher__flag { font-size: 1.1rem; line-height: 1; }
.lang-switcher__code {
  font-size: 0.85rem;
  font-family: "SFMono-Regular", monospace;
  letter-spacing: 0.05em;
}
.lang-switcher__caret { font-size: 0.7rem; opacity: 0.6; }

.lang-switcher__menu {
  position: absolute;
  top: calc(100% + 0.5rem);
  inset-inline-end: 0;
  list-style: none;
  margin: 0;
  padding: 0.5rem;
  min-width: 12rem;
  background: var(--color-bg-elev);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  box-shadow: 0 8px 24px var(--color-shadow);
  z-index: 200;
  max-height: 24rem;
  overflow-y: auto;
}
.lang-switcher__item { margin: 0; }
.lang-switcher__opt {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  width: 100%;
  padding: 0.55rem 0.8rem;
  background: transparent;
  border: 0;
  border-radius: var(--radius);
  color: var(--color-fg-soft);
  cursor: pointer;
  font-size: 0.98rem;
  font-family: inherit;
  text-align: start;
  transition: all 0.15s;
}
.lang-switcher__opt:hover {
  background: var(--color-accent);
  color: var(--color-bg-soft);
}
.lang-switcher__item.is-current .lang-switcher__opt {
  background: color-mix(in srgb, var(--color-accent) 10%, transparent);
  color: var(--color-accent);
  font-weight: 600;
}
.lang-switcher__native {
  flex: 1;
  font-family: var(--font-kai);
  letter-spacing: 0.03em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.lang-switcher__en {
  font-size: 0.82rem;
  color: var(--color-fg-mute);
  font-family: var(--font-kai);
  letter-spacing: 0.03em;
}
.lang-switcher__opt:hover .lang-switcher__en { color: inherit; }
.lang-switcher__en--current { color: var(--color-accent); font-weight: 700; }

@media (max-width: 768px) {
  .lang-switcher__btn { padding: 0.35rem 0.7rem; }
  .lang-switcher__code { display: none; }
  .lang-switcher__menu {
    inset-inline-end: 0;
    min-width: 10.5rem;
  }
  .lang-switcher__en { display: none; }
}

/* ---------- 22. RTL 完整适配（阿拉伯语等） ---------- */
[dir="rtl"] body { direction: rtl; }

/* 装饰符反转 */
[dir="rtl"] .post__body h2::before,
[dir="rtl"] .post__body h3::before,
[dir="rtl"] .page__body h2::before { content: "▎"; }

[dir="rtl"] .section__title span::before { right: 100%; left: auto; }
[dir="rtl"] .section__title span::after  { left: 100%; right: auto; }

/* 卡片 hover 微移反转 */
[dir="rtl"] .post-card:hover { transform: translateY(-4px); }  /* Y 方向不需要反转 */
[dir="rtl"] .search-result:hover { transform: translateX(-4px); }
[dir="rtl"] .category-card:hover { transform: translateY(-3px); }

/* 列表项图标位置反转 */
[dir="rtl"] .archive-item { direction: rtl; }
[dir="rtl"] .post-list__item { direction: rtl; }

/* 分页对称：保留 LTR 数字顺序 */
[dir="rtl"] .pagination__pages,
[dir="rtl"] .pagination { direction: ltr; }

/* 分页 border-left 反转 */
[dir="rtl"] .search-result { border-left: 0; border-right: 3px solid var(--color-accent); }
[dir="rtl"] .category-block { border-left: 0; border-right: 4px solid var(--cat-color); }
[dir="rtl"] blockquote { border-left: 0; border-right: 4px double var(--color-accent); }
[dir="rtl"] blockquote::before { left: auto; right: 0.4rem; }

/* 文章 meta 顺序：保持 LTR 避免日期/作者顺序混乱 */
[dir="rtl"] .post-meta { direction: ltr; }
[dir="rtl"] .post-card__meta { direction: ltr; }

/* 表格保持 LTR（数字顺序） */
[dir="rtl"] table { direction: ltr; }

/* 时间、代码片段保持 LTR */
[dir="rtl"] code,
[dir="rtl"] pre,
[dir="rtl"] time,
[dir="rtl"] .archive-item__date,
[dir="rtl"] .post-list__date,
[dir="rtl"] .error-page__code,
[dir="rtl"] .lang-switcher__code { direction: ltr; display: inline-block; }

/* 文章正文：长中文段落方向保持 LTR（混排文字），这里切回 ltr */
[dir="rtl"] .post__body,
[dir="rtl"] .page__body,
[dir="rtl"] .post-card__excerpt,
[dir="rtl"] .post-list__excerpt,
[dir="rtl"] .category-block__desc { direction: rtl; text-align: start; }

/* Hero 与 banner 文字 */
[dir="rtl"] .hero__title { direction: rtl; }
[dir="rtl"] .hero__seal { right: auto; left: 5%; transform: rotate(-8deg); }

/* Footer 列序 */
[dir="rtl"] .site-footer__inner { direction: rtl; }
[dir="rtl"] .site-footer__cols { direction: rtl; }

/* 语言切换器在 RTL 下保持从右展开 */
[dir="rtl"] .lang-switcher__menu { inset-inline-end: 0; }

/* 24px+ 容器对齐 */
[dir="rtl"] .container { direction: rtl; }

/* 关闭某些强制 LTR 子区域的对齐 */
[dir="rtl"] .section__title,
[dir="rtl"] .section__header,
[dir="rtl"] .section__lead { direction: rtl; text-align: center; }
[dir="rtl"] .post__header { direction: rtl; }
[dir="rtl"] .page__header { direction: rtl; }

/* 文章底部"上一篇/下一篇"按钮（保留 LTR 顺序：上一 → 下一篇） */
[dir="rtl"] .post__nav { direction: ltr; }
[dir="rtl"] .post__nav-link--next { text-align: right; }

/* ---------- 23. 翻译版本标识 ---------- */
.translation-bar {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.7rem 1rem;
  margin: 1.5rem 0 0;
  background: color-mix(in srgb, var(--color-secondary) 8%, transparent);
  border: 1px solid color-mix(in srgb, var(--color-secondary) 25%, transparent);
  border-radius: var(--radius);
  font-size: 0.95rem;
  color: var(--color-fg-soft);
  font-family: var(--font-kai);
  letter-spacing: 0.05em;
}
.translation-bar a { color: var(--color-secondary); }
.translation-bar__icon { font-size: 1.1rem; }

/* 翻译链接列表 */
.translation-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1rem 0;
  padding: 0;
  list-style: none;
}
.translation-list__item { margin: 0; }
.translation-list__link {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.3rem 0.75rem;
  font-size: 0.9rem;
  border: 1px solid var(--color-line);
  border-radius: 100px;
  color: var(--color-fg-soft);
  background: var(--color-bg-elev);
  text-decoration: none;
  font-family: var(--font-kai);
}
.translation-list__link.is-current {
  background: var(--color-accent);
  color: var(--color-bg-soft);
  border-color: var(--color-accent);
  font-weight: 600;
}
.translation-list__link:hover:not(.is-current) {
  border-color: var(--color-accent);
  color: var(--color-accent);
}