/**
 * 青囊中医师承主题 — 主样式表
 *
 * 目录：
 *  1.  CSS 变量 & 重置
 *  2.  基础排版 & 通用元素
 *  3.  布局工具类（container, card-grid）
 *  4.  按钮
 *  5.  顶部信息栏（topbar）
 *  6.  主导航头部（site-header）
 *  7.  移动端菜单
 *  8.  页面横幅（page-banner）
 *  9.  面包屑 & 分页
 * 10.  首页 — Hero 轮播
 * 11.  首页 — 关于我们
 * 12.  首页 — 课程卡片
 * 13.  首页 — 师资卡片
 * 14.  首页 — 传承理念
 * 15.  首页 — 文章资讯
 * 16.  首页 — 图库
 * 17.  归档页 & 文章列表
 * 18.  单篇文章 / 详情页
 * 19.  页脚（site-footer）
 * 20.  浮动联系方式
 * 21.  侧边栏小工具
 * 22.  404 页面
 * 23.  通用辅助 & 响应式
 *
 * @package qingnang
 */

/* ═══════════════════════════════════════════════════════
   1. CSS 变量 & 重置
═══════════════════════════════════════════════════════ */
:root {
  /* 颜色（可被 Customizer 动态覆盖） */
  --color-primary:    #2a7a5a;
  --color-primary-d:  #1e5e43;
  --color-primary-l:  #eaf4f0;
  --color-accent:     #c8a84b;
  --color-accent-d:   #a88835;
  --color-heading:    #1a2e2a;
  --color-body:       #4a4a4a;
  --color-muted:      #787878;
  --color-bg:         #f9f9f6;
  --color-white:      #ffffff;
  --color-border:     #e0e0d8;
  --color-footer-bg:  #1a2e2a;
  --color-footer-fg:  rgba(255,255,255,0.75);

  /* 间距 */
  --space-xs:  0.25rem;
  --space-sm:  0.5rem;
  --space-md:  1rem;
  --space-lg:  1.5rem;
  --space-xl:  2.5rem;
  --space-2xl: 4rem;
  --space-3xl: 6rem;

  /* 字体 */
  --font-serif: "Noto Serif SC", "SimSun", Georgia, serif;
  --font-sans:  "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;

  /* 圆角 */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;

  /* 阴影 */
  --shadow-sm:  0 1px 3px rgba(0,0,0,0.08);
  --shadow-md:  0 4px 16px rgba(0,0,0,0.10);
  --shadow-lg:  0 8px 32px rgba(0,0,0,0.12);

  /* 过渡 */
  --transition: 0.25s ease;

  /* 布局 */
  --header-h:   72px;
  --topbar-h:   36px;
  --container:  1200px;
  --sidebar-w:  280px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  color: var(--color-body);
  background: var(--color-bg);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-primary-d); }
ul, ol { list-style: none; }

.skip-link { position: absolute; left: -9999px; }
.skip-link:focus { left: 0; top: 0; z-index: 9999; background: var(--color-primary); color: #fff; padding: .5rem 1rem; }

/* ═══════════════════════════════════════════════════════
   2. 基础排版
═══════════════════════════════════════════════════════ */
h1,h2,h3,h4,h5,h6 {
  font-family: var(--font-serif);
  color: var(--color-heading);
  line-height: 1.3;
  font-weight: 600;
}
h1 { font-size: clamp(1.75rem, 4vw, 2.5rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.125rem; }

p { margin-bottom: 1rem; }
p:last-child { margin-bottom: 0; }

/* 富文本内容区 */
.prose-tcm h2 { font-size: 1.5rem; color: var(--color-primary); margin-top: 2rem; margin-bottom: .75rem; }
.prose-tcm h3 { font-size: 1.25rem; margin-top: 1.5rem; }
.prose-tcm p  { margin-bottom: 1rem; line-height: 1.9; color: var(--color-muted); }
.prose-tcm strong { color: var(--color-heading); font-weight: 600; }
.prose-tcm ul, .prose-tcm ol { padding-left: 1.5rem; margin-bottom: 1rem; }
.prose-tcm li { margin-bottom: .4rem; }
.prose-tcm img { border-radius: var(--radius-sm); width: 100%; margin: 1.5rem 0; }
.prose-tcm blockquote {
  border-left: 4px solid var(--color-accent);
  padding: .75rem 1.25rem;
  background: var(--color-primary-l);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 1.5rem 0;
  font-style: italic;
}

/* ═══════════════════════════════════════════════════════
   3. 布局工具类
═══════════════════════════════════════════════════════ */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: 1.25rem;
}

/* 卡片栅格 */
.card-grid {
  display: grid;
  gap: 1.5rem;
}
.card-grid--3 { grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }
.card-grid--4 { grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); }

/* 首页区块公共 */
.homepage-section { padding: var(--space-3xl) 0; }
.section-footer    { text-align: center; margin-top: var(--space-xl); }

/* 区块标题 */
.section-header { margin-bottom: var(--space-xl); }
.section-header--center { text-align: center; }
.section-header__title {
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  font-family: var(--font-serif);
  color: var(--color-heading);
  position: relative;
  display: inline-block;
  padding-bottom: .75rem;
}
.section-header--center .section-header__title::after {
  content: '';
  position: absolute;
  bottom: 0; left: 50%; transform: translateX(-50%);
  width: 48px; height: 3px;
  background: var(--color-accent);
  border-radius: 2px;
}
.section-header__subtitle {
  color: var(--color-muted);
  margin-top: .5rem;
  font-size: .9375rem;
}

/* 标签 */
.tag {
  display: inline-block;
  background: var(--color-primary-l);
  color: var(--color-primary);
  font-size: .75rem;
  font-weight: 600;
  padding: 2px 10px;
  border-radius: 20px;
  transition: background var(--transition), color var(--transition);
}
.tag:hover { background: var(--color-primary); color: var(--color-white); }

/* ═══════════════════════════════════════════════════════
   4. 按钮
═══════════════════════════════════════════════════════ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .375rem;
  font-family: var(--font-sans);
  font-weight: 500;
  border-radius: var(--radius-sm);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
  line-height: 1.4;
  padding: .625rem 1.5rem;
  font-size: .9375rem;
  white-space: nowrap;
}
.btn--sm  { padding: .375rem 1rem; font-size: .8125rem; }
.btn--lg  { padding: .875rem 2.25rem; font-size: 1.0625rem; }
.btn--block { width: 100%; }

.btn--primary {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}
.btn--primary:hover {
  background: var(--color-primary-d);
  border-color: var(--color-primary-d);
  color: var(--color-white);
}

.btn--accent {
  background: var(--color-accent);
  color: var(--color-heading);
  border-color: var(--color-accent);
}
.btn--accent:hover {
  background: var(--color-accent-d);
  border-color: var(--color-accent-d);
  color: var(--color-heading);
}

.btn--outline {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.btn--outline:hover {
  background: var(--color-primary);
  color: var(--color-white);
}
.btn--outline-light {
  color: rgba(255,255,255,.85);
  border-color: rgba(255,255,255,.6);
}
.btn--outline-light:hover {
  background: rgba(255,255,255,.15);
  color: #fff;
}

/* ═══════════════════════════════════════════════════════
   5. 顶部信息栏
═══════════════════════════════════════════════════════ */
.topbar {
  background: var(--color-heading);
  color: rgba(255,255,255,.75);
  font-size: .8125rem;
  height: var(--topbar-h);
}
.topbar__inner {
  display: flex;
  align-items: center;
  height: 100%;
  gap: 1rem;
}
.topbar__phone a { color: inherit; display: flex; align-items: center; gap: .35rem; }
.topbar__phone a:hover { color: #fff; }
.topbar__spacer { flex: 1; }

/* ═══════════════════════════════════════════════════════
   6. 主导航头部
═══════════════════════════════════════════════════════ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-white);
  box-shadow: var(--shadow-sm);
  height: var(--header-h);
}
.site-header__inner {
  display: flex;
  align-items: center;
  height: 100%;
  gap: 2rem;
}

/* Logo */
.site-header__logo a { display: flex; align-items: center; gap: .75rem; }
.site-header__logo-text { display: flex; flex-direction: column; line-height: 1.2; }
.site-header__logo-cn {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-heading);
}
.site-header__logo-desc { font-size: .6875rem; color: var(--color-muted); }

/* 桌面导航 */
.site-header__nav { flex: 1; display: flex; justify-content: flex-end; }
.nav-menu { display: flex; align-items: center; gap: .25rem; }
.nav-item { position: relative; }
.nav-link {
  display: flex;
  align-items: center;
  gap: .2rem;
  padding: .5rem .75rem;
  font-size: .9375rem;
  color: var(--color-heading);
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
}
.nav-link:hover,
.nav-item.is-active > .nav-link { color: var(--color-primary); background: var(--color-primary-l); }
.nav-arrow { font-size: .6rem; opacity: .6; transition: transform var(--transition); }

/* 二级下拉 */
.nav-submenu {
  display: none;
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  min-width: 160px;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  padding: .5rem 0;
  z-index: 200;
}
.nav-item:hover > .nav-submenu,
.nav-item:focus-within > .nav-submenu { display: block; }
.nav-item:hover > .nav-link .nav-arrow { transform: rotate(180deg); }
.nav-submenu .nav-link {
  display: block;
  padding: .5rem 1rem;
  border-radius: 0;
  font-size: .875rem;
  white-space: nowrap;
}

/* 汉堡按钮（仅移动端显示） */
.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: .5rem;
  margin-left: auto;
}
.hamburger { display: flex; flex-direction: column; gap: 5px; width: 24px; }
.hamburger span {
  display: block;
  height: 2px;
  background: var(--color-heading);
  border-radius: 1px;
  transition: all var(--transition);
}
.hamburger.is-active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.is-active span:nth-child(2) { opacity: 0; }
.hamburger.is-active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ═══════════════════════════════════════════════════════
   7. 移动端侧滑菜单
═══════════════════════════════════════════════════════ */
.mobile-menu-panel {
  position: fixed;
  top: 0; left: 0;
  width: 280px;
  height: 100%;
  background: var(--color-white);
  z-index: 300;
  transform: translateX(-100%);
  transition: transform .3s ease;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
}
.mobile-menu-panel.is-open { transform: translateX(0); }
.mobile-menu-panel__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-primary);
  color: #fff;
}
.mobile-menu-panel__site-name { font-family: var(--font-serif); font-weight: 600; font-size: 1.0625rem; }
.mobile-menu-panel__close {
  background: none;
  border: none;
  color: rgba(255,255,255,.8);
  font-size: 1.125rem;
  cursor: pointer;
  padding: .25rem .5rem;
}
.mobile-menu-panel__nav { padding: 1rem; }
.mobile-nav .menu-item > a {
  display: block;
  padding: .7rem 1rem;
  border-radius: var(--radius-sm);
  color: var(--color-heading);
  font-size: .9375rem;
  border-bottom: 1px solid var(--color-border);
}
.mobile-nav .menu-item > a:hover { background: var(--color-primary-l); color: var(--color-primary); }
.mobile-nav .sub-menu { padding-left: 1rem; }
.mobile-nav .sub-menu a { font-size: .875rem; color: var(--color-muted); }

.mobile-menu-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.45);
  z-index: 290;
}
.mobile-menu-overlay.is-visible { display: block; }

/* ═══════════════════════════════════════════════════════
   8. 页面横幅
═══════════════════════════════════════════════════════ */
.page-banner {
  background: linear-gradient(135deg, var(--color-heading) 0%, var(--color-primary) 100%);
  color: rgba(255,255,255,.9);
  padding: 2.5rem 0 2rem;
}
.page-banner--dark { background: linear-gradient(135deg, #0d1e1a 0%, #162620 100%); }
.page-banner__title { font-size: clamp(1.5rem, 3vw, 2.25rem); color: #fff; margin: .5rem 0; }
.page-banner__desc  { color: rgba(255,255,255,.7); font-size: .9375rem; margin-top: .25rem; }

/* ═══════════════════════════════════════════════════════
   9. 面包屑 & 分页
═══════════════════════════════════════════════════════ */
.breadcrumbs { font-size: .8125rem; color: rgba(255,255,255,.6); }
.breadcrumbs a { color: rgba(255,255,255,.8); }
.breadcrumbs a:hover { color: #fff; }
.breadcrumbs__sep { margin: 0 .35rem; opacity: .5; }

.pagination { display: flex; justify-content: center; margin-top: 2.5rem; }
.pagination ul.page-numbers { display: flex; gap: .5rem; flex-wrap: wrap; justify-content: center; }
.pagination .page-numbers {
  display: flex; align-items: center; justify-content: center;
  min-width: 36px; height: 36px; padding: 0 .5rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-body);
  font-size: .875rem;
  transition: all var(--transition);
}
.pagination .page-numbers:hover,
.pagination .page-numbers.current {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

/* ═══════════════════════════════════════════════════════
   10. 首页 — Hero 轮播
═══════════════════════════════════════════════════════ */
.hero-slider {
  position: relative;
  overflow: hidden;
  height: clamp(400px, 60vh, 680px);
  background: var(--color-heading);
}
.hero-slider__track { position: relative; width: 100%; height: 100%; }
.hero-slider__slide {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0;
  transition: opacity .6s ease;
}
.hero-slider__slide.is-active { opacity: 1; z-index: 1; }
.hero-slider__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(0,0,0,.2) 0%, rgba(0,0,0,.55) 100%);
}
.hero-slider__content {
  position: relative;
  z-index: 2;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-top: 2rem;
  padding-bottom: 5rem;
  max-width: 680px;
}
.hero-slider__title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 5vw, 3.25rem);
  color: #fff;
  font-weight: 700;
  text-shadow: 0 2px 8px rgba(0,0,0,.4);
  margin-bottom: .75rem;
}
.hero-slider__subtitle {
  font-size: clamp(.9375rem, 2vw, 1.1875rem);
  color: rgba(255,255,255,.88);
  margin-bottom: 1.75rem;
  line-height: 1.7;
}
.hero-slider__cta { font-size: 1.0625rem; }

/* 圆点 */
.hero-slider__dots {
  position: absolute;
  bottom: 1.5rem;
  left: 50%; transform: translateX(-50%);
  display: flex; gap: .5rem;
  z-index: 10;
}
.hero-slider__dot {
  width: 10px; height: 10px;
  border-radius: 50%;
  background: rgba(255,255,255,.45);
  border: none; cursor: pointer;
  transition: all var(--transition);
}
.hero-slider__dot.is-active { background: var(--color-accent); width: 28px; border-radius: 5px; }

/* 箭头 */
.hero-slider__arrow {
  position: absolute;
  top: 50%; transform: translateY(-50%);
  z-index: 10;
  background: rgba(255,255,255,.12);
  border: 1px solid rgba(255,255,255,.25);
  color: #fff;
  width: 44px; height: 44px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  transition: background var(--transition);
  backdrop-filter: blur(4px);
}
.hero-slider__arrow:hover { background: rgba(255,255,255,.25); }
.hero-slider__arrow--prev { left: 1.25rem; }
.hero-slider__arrow--next { right: 1.25rem; }

/* ═══════════════════════════════════════════════════════
   11. 首页 — 关于我们
═══════════════════════════════════════════════════════ */
.section-about__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}
.section-about__image-wrap { position: relative; }
.section-about__image { border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); width: 100%; aspect-ratio: 4/3; object-fit: cover; }
.section-about__badge {
  position: absolute;
  bottom: -1.25rem; right: -1.25rem;
  background: var(--color-accent);
  color: var(--color-heading);
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
  text-align: center;
  box-shadow: var(--shadow-md);
}
.section-about__badge-year { display: block; font-size: 2rem; font-weight: 700; font-family: var(--font-serif); line-height: 1; }
.section-about__badge-text { font-size: .75rem; font-weight: 600; white-space: nowrap; }

.section-about__stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: .75rem;
  margin: 1.75rem 0;
}
.section-about__stat { text-align: center; }
.section-about__stat-num { display: block; font-size: 1.5rem; font-weight: 700; font-family: var(--font-serif); color: var(--color-primary); }
.section-about__stat-label { font-size: .75rem; color: var(--color-muted); }

/* ═══════════════════════════════════════════════════════
   12. 首页 — 课程卡片
═══════════════════════════════════════════════════════ */
.course-card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
  display: flex;
  flex-direction: column;
}
.course-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.course-card__thumb-wrap { position: relative; display: block; overflow: hidden; aspect-ratio: 4/3; }
.course-card__thumb { width: 100%; height: 100%; object-fit: cover; transition: transform .4s ease; }
.course-card:hover .course-card__thumb { transform: scale(1.04); }
.course-card__cat {
  position: absolute;
  top: .75rem; left: .75rem;
}
.course-card__body { padding: 1.25rem; flex: 1; display: flex; flex-direction: column; }
.course-card__title { font-size: 1.0625rem; margin-bottom: .5rem; flex: 1; }
.course-card__title a { color: var(--color-heading); }
.course-card__title a:hover { color: var(--color-primary); }
.course-card__excerpt { font-size: .875rem; color: var(--color-muted); margin-bottom: 1rem; line-height: 1.65; flex: 1; }
.course-card__link { font-size: .875rem; font-weight: 600; color: var(--color-primary); margin-top: auto; }

/* ═══════════════════════════════════════════════════════
   13. 首页 — 师资卡片
═══════════════════════════════════════════════════════ */
.teacher-card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  text-align: center;
  transition: transform var(--transition), box-shadow var(--transition);
}
.teacher-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.teacher-card__photo-wrap { display: block; overflow: hidden; aspect-ratio: 1/1; }
.teacher-card__photo { width: 100%; height: 100%; object-fit: cover; transition: transform .4s ease; }
.teacher-card:hover .teacher-card__photo { transform: scale(1.04); }
.teacher-card__body { padding: 1.25rem; }
.teacher-card__name { font-size: 1.0625rem; margin-bottom: .25rem; }
.teacher-card__name a { color: var(--color-heading); }
.teacher-card__type { font-size: .8125rem; color: var(--color-primary); font-weight: 600; margin-bottom: .5rem; }
.teacher-card__excerpt { font-size: .8125rem; color: var(--color-muted); }

/* ═══════════════════════════════════════════════════════
   14. 首页 — 传承理念
═══════════════════════════════════════════════════════ */
.section-heritage { color: rgba(255,255,255,.85); }
.section-heritage .section-header__title { color: #fff; }
.section-heritage .section-header__subtitle { color: rgba(255,255,255,.6); }
.section-heritage--dark .section-header__title { color: var(--color-accent); }

.heritage-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 1.5rem; }
.heritage-card {
  background: rgba(255,255,255,.07);
  border: 1px solid rgba(255,255,255,.12);
  border-radius: var(--radius-md);
  padding: 2rem 1.75rem;
  transition: background var(--transition);
}
.heritage-card:hover { background: rgba(255,255,255,.12); }
.heritage-card__icon { font-size: 2.25rem; margin-bottom: 1rem; color: var(--color-accent); }
.heritage-card__title { font-size: 1.1875rem; color: #fff; margin-bottom: .75rem; }
.heritage-card__excerpt { font-size: .875rem; color: rgba(255,255,255,.65); line-height: 1.75; margin-bottom: 1.25rem; }
.heritage-card__link { font-size: .875rem; font-weight: 600; color: var(--color-accent); }
.heritage-card__link:hover { color: #fff; }

/* ═══════════════════════════════════════════════════════
   15. 首页 — 文章资讯
═══════════════════════════════════════════════════════ */
.articles-layout { display: grid; grid-template-columns: 1fr 340px; gap: 2rem; }

.article-featured__thumb-wrap { display: block; overflow: hidden; border-radius: var(--radius-md); aspect-ratio: 16/9; }
.article-featured__thumb { width: 100%; height: 100%; object-fit: cover; transition: transform .4s ease; }
.article-featured__thumb-wrap:hover .article-featured__thumb { transform: scale(1.03); }
.article-featured__body { padding: 1.25rem 0; }
.article-featured__title { font-size: 1.375rem; margin: .5rem 0 .75rem; }
.article-featured__excerpt { color: var(--color-muted); font-size: .9375rem; margin-bottom: 1.25rem; }

.article-list { display: flex; flex-direction: column; gap: 1.25rem; }
.article-list__item { display: grid; grid-template-columns: 88px 1fr; gap: 1rem; align-items: start; }
.article-list__thumb-wrap { display: block; overflow: hidden; border-radius: var(--radius-sm); aspect-ratio: 4/3; }
.article-list__thumb { width: 100%; height: 100%; object-fit: cover; }
.article-list__title { font-size: .9375rem; line-height: 1.45; margin: .25rem 0 .4rem; }
.article-list__title a { color: var(--color-heading); }
.article-list__title a:hover { color: var(--color-primary); }
.article-list__excerpt { font-size: .8125rem; color: var(--color-muted); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

.article-meta__date { font-size: .75rem; color: var(--color-muted); }

/* ═══════════════════════════════════════════════════════
   16. 首页 — 图库
═══════════════════════════════════════════════════════ */
.gallery-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: .75rem; }
.gallery-grid--archive { grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); }
.gallery-grid__item {
  position: relative;
  display: block;
  overflow: hidden;
  border-radius: var(--radius-sm);
  aspect-ratio: 1/1;
  cursor: zoom-in;
}
.gallery-grid__img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s ease; }
.gallery-grid__item:hover .gallery-grid__img { transform: scale(1.06); }
.gallery-grid__overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  transition: background var(--transition);
}
.gallery-grid__item:hover .gallery-grid__overlay { background: rgba(0,0,0,.45); }
.gallery-grid__zoom { color: #fff; opacity: 0; transition: opacity var(--transition); }
.gallery-grid__item:hover .gallery-grid__zoom { opacity: 1; }
.gallery-grid__caption { color: #fff; font-size: .75rem; text-align: center; padding: 0 .5rem; opacity: 0; transition: opacity var(--transition); }
.gallery-grid__item:hover .gallery-grid__caption { opacity: 1; }

/* ═══════════════════════════════════════════════════════
   17. 归档页 & 文章列表
═══════════════════════════════════════════════════════ */
.archive-container { padding-top: 2.5rem; padding-bottom: 3rem; }
.archive-layout { display: grid; grid-template-columns: 1fr var(--sidebar-w); gap: 2.5rem; align-items: start; }
.archive-layout__sidebar { position: sticky; top: calc(var(--header-h) + 1rem); }

/* 文章列表行 */
.post-list { display: flex; flex-direction: column; gap: 2rem; }
.post-list__item { display: grid; grid-template-columns: 240px 1fr; gap: 1.75rem; align-items: start; }
.post-list__thumb-wrap { display: block; overflow: hidden; border-radius: var(--radius-md); aspect-ratio: 3/2; }
.post-list__thumb { width: 100%; height: 100%; object-fit: cover; transition: transform .4s ease; }
.post-list__thumb-wrap:hover .post-list__thumb { transform: scale(1.04); }
.post-list__meta { display: flex; align-items: center; gap: .75rem; margin-bottom: .5rem; flex-wrap: wrap; }
.post-list__title { font-size: 1.25rem; margin-bottom: .5rem; }
.post-list__title a { color: var(--color-heading); }
.post-list__title a:hover { color: var(--color-primary); }
.post-list__excerpt { color: var(--color-muted); margin-bottom: 1rem; }

/* 分类筛选条 */
.archive-filter { background: var(--color-white); border-bottom: 1px solid var(--color-border); }
.filter-tabs { display: flex; gap: .5rem; flex-wrap: wrap; padding: .75rem 0; }
.filter-tab a {
  display: block;
  padding: .35rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: 20px;
  font-size: .875rem;
  color: var(--color-body);
  transition: all var(--transition);
}
.filter-tab.is-active a,
.filter-tab a:hover { background: var(--color-primary); border-color: var(--color-primary); color: #fff; }

/* ═══════════════════════════════════════════════════════
   18. 单篇文章 / 详情页
═══════════════════════════════════════════════════════ */
.single-container { padding-top: 2.5rem; padding-bottom: 3rem; }
.single-container--narrow { max-width: 860px; }

/* 课程详情 */
.single-course__hero { margin-bottom: 2rem; }
.single-course__cover { width: 100%; aspect-ratio: 21/9; object-fit: cover; border-radius: var(--radius-lg); }
.single-course__layout { display: grid; grid-template-columns: 1fr 300px; gap: 2.5rem; align-items: start; }
.single-course__cats { display: flex; gap: .5rem; flex-wrap: wrap; margin-bottom: .75rem; }
.single-course__title { font-size: clamp(1.5rem, 3vw, 2rem); margin-bottom: .5rem; }
.single-course__meta { font-size: .8125rem; color: var(--color-muted); margin-bottom: 1.5rem; }

/* 师资详情 */
.single-teacher__layout { display: grid; grid-template-columns: 260px 1fr; gap: 3rem; align-items: start; margin-bottom: 3rem; }
.single-teacher__photo { width: 100%; aspect-ratio: 1; object-fit: cover; border-radius: var(--radius-md); box-shadow: var(--shadow-md); }
.single-teacher__name { font-size: 1.75rem; margin: 1rem 0 .25rem; }
.single-teacher__type { color: var(--color-primary); font-weight: 600; margin-bottom: 1.25rem; }
.single-teacher__courses { padding-top: 2rem; border-top: 1px solid var(--color-border); }

/* 传承理念详情 */
.single-heritage__cover { margin-bottom: 2rem; }
.single-heritage__cover-img { width: 100%; aspect-ratio: 16/9; object-fit: cover; border-radius: var(--radius-lg); }

/* 文章详情 */
.single-layout { display: grid; grid-template-columns: 1fr var(--sidebar-w); gap: 2.5rem; }
.single-layout__sidebar { position: sticky; top: calc(var(--header-h) + 1rem); }
.single-post__cover { margin-bottom: 1.75rem; }
.single-post__cover-img { width: 100%; aspect-ratio: 16/9; object-fit: cover; border-radius: var(--radius-lg); }
.single-post__meta { display: flex; align-items: center; gap: .75rem; margin-bottom: .75rem; flex-wrap: wrap; }
.single-post__title { font-size: clamp(1.5rem, 3vw, 2rem); margin-bottom: .75rem; }
.single-post__footer { border-top: 1px solid var(--color-border); padding-top: 1rem; margin-top: 2rem; }

/* 前后篇导航 */
.post-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 2.5rem;
  padding: 1.5rem;
  background: var(--color-white);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
}
.post-nav__label { display: block; font-size: .75rem; color: var(--color-muted); margin-bottom: .2rem; }
.post-nav__next { text-align: right; }

/* 侧边栏卡片 */
.sidebar-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}
.sidebar-card__title { font-size: 1.0625rem; margin-bottom: .75rem; color: var(--color-heading); }
.sidebar-card__desc { font-size: .875rem; color: var(--color-muted); margin-bottom: 1rem; }
.sidebar-card__qr { width: 120px; margin: 0 auto 1rem; }
.sidebar-related-list { display: flex; flex-direction: column; gap: .75rem; }
.sidebar-related-list__item a { display: grid; grid-template-columns: 64px 1fr; gap: .75rem; align-items: center; }
.sidebar-related-list__item img { border-radius: var(--radius-sm); aspect-ratio: 4/3; object-fit: cover; }
.sidebar-related-list__item span { font-size: .875rem; color: var(--color-heading); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

/* ═══════════════════════════════════════════════════════
   19. 页脚
═══════════════════════════════════════════════════════ */
.site-footer { color: var(--color-footer-fg); font-size: .875rem; }

.site-footer__widgets {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 3rem;
  padding: 3.5rem 0;
  border-bottom: 1px solid rgba(255,255,255,.1);
}

.footer-widget__title, .site-footer__brand {
  font-family: var(--font-serif);
  color: rgba(255,255,255,.9);
  font-size: 1.0625rem;
  margin-bottom: 1rem;
  padding-bottom: .5rem;
  border-bottom: 2px solid var(--color-accent);
  display: inline-block;
}
.footer-widget__desc { color: var(--color-footer-fg); line-height: 1.75; margin-bottom: 1rem; }
.footer-links li { margin-bottom: .45rem; }
.footer-links a { color: var(--color-footer-fg); transition: color var(--transition); }
.footer-links a:hover { color: var(--color-accent); }
.footer-contact-list li { display: flex; align-items: flex-start; gap: .5rem; margin-bottom: .6rem; }
.footer-contact-list a { color: var(--color-footer-fg); }
.footer-contact-list a:hover { color: var(--color-accent); }
.fcl-icon { flex-shrink: 0; }

.site-footer__bottom { padding: 1.25rem 0; }
.site-footer__bottom-inner { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: .75rem; }
.site-footer__copyright { color: rgba(255,255,255,.5); font-size: .8125rem; }
.site-footer__copyright a { color: inherit; }
.site-footer__copyright a:hover { color: var(--color-accent); }

.footer-nav { display: flex; gap: 1.25rem; flex-wrap: wrap; }
.footer-nav a { color: rgba(255,255,255,.55); font-size: .8125rem; }
.footer-nav a:hover { color: #fff; }

/* ═══════════════════════════════════════════════════════
   20. 浮动联系方式
═══════════════════════════════════════════════════════ */
.float-contact {
  position: fixed;
  right: 0;
  bottom: 5rem;
  z-index: 500;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
}
.float-contact__toggle {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .3rem;
  background: var(--float-bg, var(--color-primary));
  color: var(--float-icon, #fff);
  border: none;
  padding: .75rem .625rem;
  cursor: pointer;
  border-radius: var(--radius-md) 0 0 var(--radius-md);
  box-shadow: var(--shadow-md);
  transition: background var(--transition);
  font-size: .6875rem;
  font-weight: 600;
}
.float-contact__toggle:hover { filter: brightness(1.1); }
.float-contact__label { writing-mode: vertical-rl; line-height: 1; letter-spacing: .05em; }

.float-contact__panel {
  display: none;
  flex-direction: column;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-right: none;
  border-radius: var(--radius-md) 0 0 var(--radius-md);
  box-shadow: var(--shadow-lg);
  overflow: visible;
  min-width: 200px;
}
.float-contact__panel.is-open { display: flex; }

.float-contact__item {
  display: flex;
  align-items: center;
  gap: .75rem;
  padding: .75rem 1rem;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-heading);
  cursor: pointer;
  transition: background var(--transition);
  position: relative;
  text-decoration: none;
  background: none;
  border-left: none; border-right: none;
  width: 100%;
  text-align: left;
  font-family: var(--font-sans);
  font-size: .875rem;
}
.float-contact__item:last-child { border-bottom: none; }
.float-contact__item:hover { background: var(--color-primary-l); }
.float-contact__icon {
  width: 32px; height: 32px;
  display: flex; align-items: center; justify-content: center;
  background: var(--float-bg, var(--color-primary));
  color: var(--float-icon, #fff);
  border-radius: 50%;
  flex-shrink: 0;
}
.float-contact__name { display: block; font-size: .8125rem; font-weight: 600; }
.float-contact__value { display: block; font-size: .75rem; color: var(--color-muted); }

/* QR 弹出层 */
.float-contact__qr-popup {
  display: none;
  position: absolute;
  right: calc(100% + .75rem);
  top: 50%; transform: translateY(-50%);
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1rem;
  box-shadow: var(--shadow-lg);
  text-align: center;
  min-width: 150px;
  z-index: 600;
}
.float-contact__item:hover .float-contact__qr-popup { display: block; }
.float-contact__qr-popup img { width: 120px; height: 120px; object-fit: contain; margin-bottom: .5rem; }
.float-contact__qr-popup p { font-size: .75rem; color: var(--color-muted); }

/* ═══════════════════════════════════════════════════════
   21. 侧边栏小工具
═══════════════════════════════════════════════════════ */
.sidebar-widget { margin-bottom: 1.5rem; background: var(--color-white); border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: 1.25rem; }
.sidebar-widget__title { font-size: 1.0625rem; margin-bottom: 1rem; padding-bottom: .5rem; border-bottom: 2px solid var(--color-primary); color: var(--color-heading); }

/* ═══════════════════════════════════════════════════════
   22. 404 页面
═══════════════════════════════════════════════════════ */
.error-404-container { display: flex; justify-content: center; padding: 5rem 1.25rem; }
.error-404 { text-align: center; max-width: 520px; }
.error-404__code { font-size: 7rem; font-weight: 800; font-family: var(--font-serif); color: var(--color-primary-l); line-height: 1; margin-bottom: .5rem; }
.error-404__title { font-size: 1.75rem; margin-bottom: 1rem; }
.error-404__desc { color: var(--color-muted); margin-bottom: 2rem; }
.error-404__links { display: flex; justify-content: center; gap: 1rem; flex-wrap: wrap; margin-top: 1.5rem; }
.error-404 .search-form { display: flex; gap: .5rem; }
.error-404 input[type="search"] {
  flex: 1; padding: .625rem 1rem;
  border: 1px solid var(--color-border); border-radius: var(--radius-sm);
  font-size: .9375rem; outline: none;
}
.error-404 input[type="search"]:focus { border-color: var(--color-primary); box-shadow: 0 0 0 3px rgba(42,122,90,.15); }
.error-404 input[type="submit"] { padding: .625rem 1.25rem; background: var(--color-primary); color: #fff; border: none; border-radius: var(--radius-sm); cursor: pointer; }

/* 通用无内容提示 */
.no-content { text-align: center; color: var(--color-muted); padding: 3rem 0; }

/* ═══════════════════════════════════════════════════════
   23. 响应式
═══════════════════════════════════════════════════════ */

/* 1024px — 小桌面 */
@media (max-width: 1024px) {
  .section-about__inner     { gap: 2.5rem; }
  .articles-layout          { grid-template-columns: 1fr; }
  .article-list             { flex-direction: row; flex-wrap: wrap; }
  .article-list__item       { width: calc(50% - .625rem); }
  .single-course__layout    { grid-template-columns: 1fr 260px; }
  .gallery-grid             { grid-template-columns: repeat(3, 1fr); }
  .site-footer__widgets     { gap: 2rem; }
}

/* 768px — 平板 */
@media (max-width: 768px) {
  .site-header__nav         { display: none; }
  .mobile-menu-toggle       { display: flex; }

  .section-about__inner     { grid-template-columns: 1fr; }
  .section-about__stats     { grid-template-columns: repeat(2, 1fr); }
  .section-about__badge     { right: 0; }

  .articles-layout          { grid-template-columns: 1fr; }
  .article-list             { flex-direction: column; }
  .article-list__item       { width: 100%; }

  .single-course__layout    { grid-template-columns: 1fr; }
  .single-teacher__layout   { grid-template-columns: 1fr; }
  .single-layout            { grid-template-columns: 1fr; }
  .archive-layout           { grid-template-columns: 1fr; }
  .archive-layout__sidebar  { position: static; }
  .single-layout__sidebar   { position: static; }

  .post-list__item          { grid-template-columns: 1fr; }
  .post-list__thumb-wrap    { aspect-ratio: 16/9; }

  .gallery-grid             { grid-template-columns: repeat(3, 1fr); }
  .site-footer__widgets     { grid-template-columns: 1fr; gap: 2rem; }

  .hero-slider              { height: clamp(320px, 50vh, 480px); }
  .hero-slider__arrow       { display: none; }
}

/* 480px — 手机 */
@media (max-width: 480px) {
  .card-grid--3,
  .card-grid--4             { grid-template-columns: 1fr; }
  .heritage-grid            { grid-template-columns: 1fr; }
  .gallery-grid             { grid-template-columns: repeat(2, 1fr); }
  .topbar                   { display: none; }
  .float-contact__panel     { min-width: 170px; }
  .site-footer__bottom-inner { flex-direction: column; text-align: center; }
  .post-nav                 { grid-template-columns: 1fr; }
  .post-nav__next           { text-align: left; }
}