/* ===== 吾喵春早动漫社团 · 全局样式 ===== */

:root {
  --c-primary: #4CAF7A;
  --c-primary-dark: #3a9166;
  --c-primary-light: #e8f5ee;
  --c-accent: #F48FB1;
  --c-accent-light: #fce4ec;
  --c-bg: #ffffff;
  --c-bg-alt: #f8f9fa;
  --c-bg-card: #ffffff;
  --c-text: #2c3e50;
  --c-text-light: #7a8a99;
  --c-border: #e8ecf0;
  --c-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
  --c-shadow-hover: 0 6px 24px rgba(0, 0, 0, 0.12);
  --radius: 12px;
  --radius-sm: 8px;
  --max-width: 1200px;
  --nav-height: 64px;
  --transition: all 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
  color: var(--c-text);
  background: var(--c-bg);
  line-height: 1.7;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition);
}

img {
  max-width: 100%;
  display: block;
}

/* ===== 图片加载占位 + 淡入 =====
   .img-fade 由 js/data.js 在图片开始加载前加上（初始透明），
   加载成功/失败/超时后补上 .is-loaded 触发淡入；
   占位浅灰铺在图片父容器上，图片现身后再还原父容器原有背景色。 */
.img-fade {
  opacity: 0;
  transition: opacity .45s ease;
}
.img-fade.is-loaded {
  opacity: 1;
}
/* 尊重系统的「减少动态效果」偏好时直接显示，不做渐显 */
@media (prefers-reduced-motion: reduce) {
  .img-fade {
    transition: none;
  }
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== 导航栏 ===== */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--c-border);
  height: var(--nav-height);
  display: flex;
  align-items: center;
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.nav-logo {
  font-size: 20px;
  font-weight: 700;
  color: var(--c-primary);
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
}

.nav-logo .logo-icon {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--c-primary), var(--c-accent));
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 16px;
  font-weight: bold;
}

.nav-logo .logo-img {
  border-radius: 6px;
  object-fit: cover;
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
}

.nav-links a, .nav-links .nav-item {
  display: block;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 500;
  color: var(--c-text);
  cursor: pointer;
  position: relative;
  transition: var(--transition);
}

.nav-links a:hover, .nav-links .nav-item:hover {
  color: var(--c-primary);
  background: var(--c-primary-light);
}

.nav-links a.active {
  color: var(--c-primary);
  background: var(--c-primary-light);
}

/* 下拉菜单 */
.dropdown {
  position: relative;
}

.dropdown-trigger {
  display: flex;
  align-items: center;
  gap: 4px;
}

.dropdown-trigger::after {
  content: '';
  width: 0;
  height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 5px solid currentColor;
  opacity: 0.5;
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  right: 0;
  min-width: 180px;
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  box-shadow: var(--c-shadow-hover);
  padding: 8px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: var(--transition);
}

.dropdown:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-menu a {
  display: block;
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--c-text);
}

.dropdown-menu a:hover {
  background: var(--c-primary-light);
  color: var(--c-primary);
}

/* ===== 通用板块 ===== */
.section {
  padding: 64px 0;
}

.section-alt {
  background: var(--c-bg-alt);
}

.section-header {
  text-align: center;
  margin-bottom: 48px;
}

.section-header h2 {
  font-size: 28px;
  font-weight: 700;
  color: var(--c-text);
  margin-bottom: 8px;
}

.section-header p {
  font-size: 15px;
  color: var(--c-text-light);
}

.section-more {
  text-align: center;
  margin-top: 40px;
}

.btn {
  display: inline-block;
  padding: 12px 32px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  white-space: nowrap;
  flex-shrink: 0;
}

.btn-primary {
  background: var(--c-primary);
  color: #fff;
}

.btn-primary:hover {
  background: var(--c-primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(76, 175, 122, 0.3);
}

.btn-outline {
  background: transparent;
  color: var(--c-primary);
  border: 2px solid var(--c-primary);
}

.btn-outline:hover {
  background: var(--c-primary);
  color: #fff;
}

/* 素材详情操作区：所有按钮强制同高同宽基准（颜色样式仍由各自类决定） */
.mat-detail-actions a.btn {
  box-sizing: border-box;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 50px;
  padding: 0 32px;
}

/* outline 按钮自带 2px 边框，横向 padding 收 2px 补偿，总宽与 primary 一致 */
.mat-detail-actions a.btn-outline {
  padding: 0 30px;
}

/* ===== 首页 Banner ===== */
.hero {
  position: relative;
  min-height: 520px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: linear-gradient(135deg, #e8f5ee 0%, #fce4ec 100%);
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0.85;
  /* 说明：这里不再做整体缩放。多图层视差的 scale / translate 由 js 写在每层 .hero-layer 上，
     因为每层要根据自身最大位移反推所需放大倍数，统一写死 1.15 会在大位移时露边 */
}

/* 视差图层：底图与叠加的透明 PNG 各占一层，DOM 顺序决定叠放顺序（靠后在上）。
   transform 完全交给 js 每帧写入，所以这里不写 transition —— 由 requestAnimationFrame 逐帧逼近，
   鼠标移入移出都是连续位移，不会有 CSS 过渡抢着插值 */
.hero-layer {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  pointer-events: none;
  will-change: transform;
}

/* 视频背景：铺满 hero，不做视差，等比裁切覆盖 */
.hero-bg-video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.85;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(76, 175, 122, 0.15), rgba(244, 143, 177, 0.15));
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 60px 24px;
  max-width: 800px;
}

.hero-content h1 {
  font-size: 42px;
  font-weight: 800;
  margin-bottom: 16px;
  color: var(--c-text);
  letter-spacing: 2px;
}

.hero-content .subtitle {
  font-size: 18px;
  color: var(--c-text-light);
  margin-bottom: 12px;
}

.hero-content .description {
  font-size: 15px;
  color: var(--c-text-light);
  max-width: 560px;
  margin: 0 auto 32px;
  line-height: 1.8;
}

/* ===== 合照展示 ===== */
.photo-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.photo-card {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--c-shadow);
  transition: var(--transition);
  background: #fff;
}

.photo-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--c-shadow-hover);
}

.photo-card .photo-img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.photo-card .photo-info {
  padding: 16px;
}

.photo-card .photo-caption {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 4px;
}

.photo-card .photo-date {
  font-size: 13px;
  color: var(--c-text-light);
}

/* ===== 素材卡片 ===== */
.material-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.material-card {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--c-shadow);
  transition: var(--transition);
  background: #fff;
  cursor: pointer;
  display: flex;
  flex-direction: column;
}

.material-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--c-shadow-hover);
}

.material-card .mat-cover {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.material-card .mat-body {
  padding: 20px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.material-card .mat-tag {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 500;
  background: var(--c-primary-light);
  color: var(--c-primary);
  margin-bottom: 10px;
  align-self: flex-start;
}

.material-card .mat-title {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--c-text);
}

.material-card .mat-desc {
  font-size: 14px;
  color: var(--c-text-light);
  line-height: 1.6;
  flex: 1;
}

/* ===== 产品账号 ===== */
.product-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 24px;
}

.product-card {
  text-align: center;
  padding: 24px 12px;
  border-radius: var(--radius);
  background: #fff;
  box-shadow: var(--c-shadow);
  transition: var(--transition);
  cursor: pointer;
}

.product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--c-shadow-hover);
}

.product-card .product-logo {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto 14px;
  border: 3px solid var(--c-primary-light);
}

.product-card .product-name {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 4px;
}

.product-card .product-platform {
  font-size: 12px;
  color: var(--c-text-light);
}

/* ===== 子页面通用 ===== */
.page-header {
  background: linear-gradient(135deg, var(--c-primary-light), var(--c-accent-light));
  padding: 56px 0 48px;
  text-align: center;
}

.page-header h1 {
  font-size: 32px;
  font-weight: 800;
  margin-bottom: 8px;
}

.page-header p {
  font-size: 16px;
  color: var(--c-text-light);
}

/* ===== 一刻广场 ===== */
.plaza-list {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.plaza-post {
  display: grid;
  grid-template-columns: 360px 1fr;
  gap: 28px;
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--c-shadow);
  transition: var(--transition);
}

.plaza-post:hover {
  box-shadow: var(--c-shadow-hover);
  transform: translateY(-2px);
}

.plaza-post .post-img {
  width: 100%;
  height: 100%;
  min-height: 240px;
  object-fit: cover;
}

/* 列表配图比例：后台可设为竖图/横图/正方形，图片按该比例缩放并居中裁切，不会被拉伸变形。
   只在 .plaza-post 上挂 has-ratio + ratio-* 两个 class，具体比例值集中在这里维护。 */
.plaza-post.has-ratio .post-img {
  height: auto;       /* 高度交给 aspect-ratio 计算，不再被 grid 拉伸 */
  min-height: 0;
  align-self: start;  /* 右侧正文更高时，图片顶部对齐而不是被拉长 */
  object-fit: cover;
}

.plaza-post.ratio-portrait .post-img  { aspect-ratio: 3 / 4; }
.plaza-post.ratio-landscape .post-img { aspect-ratio: 4 / 3; }
.plaza-post.ratio-square .post-img    { aspect-ratio: 1 / 1; }

.plaza-post .post-body {
  padding: 28px 28px 28px 0;
  display: flex;
  flex-direction: column;
}

.plaza-post .post-tags {
  display: flex;
  gap: 8px;
  margin-bottom: 12px;
}

.plaza-post .post-tag {
  padding: 3px 12px;
  border-radius: 20px;
  font-size: 12px;
  background: var(--c-accent-light);
  color: var(--c-accent);
}

.plaza-post .post-title {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 10px;
}

.plaza-post .post-meta {
  font-size: 13px;
  color: var(--c-text-light);
  margin-bottom: 12px;
}

.plaza-post .post-content {
  font-size: 14px;
  color: var(--c-text);
  line-height: 1.7;
  flex: 1;
}

/* ===== 素材库页面 ===== */
.mat-filter {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.mat-filter button {
  padding: 8px 20px;
  border-radius: 20px;
  border: 1px solid var(--c-border);
  background: #fff;
  font-size: 14px;
  cursor: pointer;
  transition: var(--transition);
  color: var(--c-text);
}

.mat-filter button.active,
.mat-filter button:hover {
  background: var(--c-primary);
  color: #fff;
  border-color: var(--c-primary);
}

/* ===== 素材详情页 ===== */
.mat-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}

.mat-detail-img {
  width: 100%;
  border-radius: var(--radius);
  box-shadow: var(--c-shadow);
}

.mat-detail-info h1 {
  font-size: 26px;
  margin-bottom: 16px;
}

.mat-detail-meta {
  display: flex;
  gap: 20px;
  margin-bottom: 20px;
  color: var(--c-text-light);
  font-size: 14px;
}

.mat-detail-desc {
  font-size: 15px;
  line-height: 1.8;
  margin-bottom: 28px;
  color: var(--c-text);
}

.mat-detail-actions {
  display: flex;
  gap: 12px;
  align-items: flex-end;
  flex-wrap: wrap;
}

.mat-detail-actions > a.btn {
  white-space: nowrap;
}

/* 素材/课程富文本展示区 */
.rich-display {
  margin-top: 40px;
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--c-shadow);
  padding: 32px;
}

.rich-display h2 {
  font-size: 20px;
  font-weight: 700;
  margin: 24px 0 12px;
  color: var(--c-text);
}

.rich-display h2:first-child {
  margin-top: 0;
}

.rich-display h3 {
  font-size: 17px;
  font-weight: 700;
  margin: 20px 0 10px;
}

.rich-display p {
  font-size: 15px;
  line-height: 1.9;
  margin-bottom: 12px;
  color: var(--c-text);
}

.rich-display img {
  max-width: 100%;
  border-radius: var(--radius-sm);
  margin: 12px 0;
}

/* 富文本里上传嵌入的视频：自适应宽度播放 */
.rich-display video {
  max-width: 100%;
  width: 100%;
  border-radius: var(--radius-sm);
  margin: 12px 0;
  display: block;
  background: #000;
}

.rich-display ul, .rich-display ol {
  padding-left: 24px;
  margin-bottom: 12px;
}

.rich-display li {
  font-size: 15px;
  line-height: 1.9;
  margin-bottom: 6px;
}

.rich-display a {
  color: var(--c-primary);
  text-decoration: underline;
}

.rich-display blockquote {
  border-left: 3px solid var(--c-primary);
  padding: 8px 16px;
  margin: 12px 0;
  background: var(--c-bg-alt);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.rich-display hr {
  border: none;
  border-top: 1px solid var(--c-border);
  margin: 20px 0;
}

/* ===== 富文本编辑器 ===== */
.rte-wrapper {
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: #fff;
}

.rte-toolbar {
  display: flex;
  align-items: center;
  gap: 2px;
  padding: 8px;
  background: var(--c-bg-alt);
  border-bottom: 1px solid var(--c-border);
  flex-wrap: wrap;
}

.rte-toolbar button {
  min-width: 34px;
  height: 32px;
  padding: 0 8px;
  border: none;
  background: transparent;
  border-radius: 6px;
  cursor: pointer;
  font-size: 14px;
  color: var(--c-text);
  transition: var(--transition);
}

.rte-toolbar button:hover {
  background: var(--c-border);
}

.rte-toolbar button.active {
  background: var(--c-primary);
  color: #fff;
}

.rte-sep {
  width: 1px;
  height: 20px;
  background: var(--c-border);
  margin: 0 6px;
}

.rte-canvas {
  padding: 16px 20px;
  outline: none;
  overflow-y: auto;
  /* 固定最大高度：内容超出时显示内部滚动条，避免编辑器无限向下延伸 */
  max-height: 480px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-text);
}

.rte-canvas:focus {
  box-shadow: inset 0 0 0 2px rgba(76, 175, 122, 0.25);
}

/* 编辑器内图片统一限制为内容区宽度的 50%：随编辑器宽度自适应，height:auto 保持原始宽高比、不拉伸变形 */
.rte-canvas img {
  max-width: 50%;
  height: auto;
  border-radius: var(--radius-sm);
}

/* 编辑器里已上传嵌入的视频占位显示 */
.rte-canvas video {
  max-width: 100%;
  width: 100%;
  border-radius: var(--radius-sm);
  display: block;
  background: #000;
}

/* 上传进行中的轻量提示条（不打断输入） */
.rte-status {
  padding: 8px 20px;
  font-size: 13px;
  color: var(--c-primary);
  background: var(--c-primary-light);
  border-top: 1px solid var(--c-border);
}

.rte-canvas:empty::before {
  content: attr(data-placeholder);
  color: var(--c-text-light);
}

.rte-source {
  width: 100%;
  border: none;
  padding: 16px 20px;
  font-family: Consolas, Monaco, monospace;
  font-size: 13px;
  line-height: 1.6;
  outline: none;
  resize: vertical;
  color: var(--c-text);
  background: #fafafa;
  /* 源码模式同样限制最大高度，与正文画布保持一致 */
  max-height: 480px;
}

/* ===== 春早生产车间 ===== */
.workshop-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.workshop-card {
  border-radius: var(--radius);
  overflow: hidden;
  background: #fff;
  box-shadow: var(--c-shadow);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.workshop-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--c-shadow-hover);
}

.workshop-card .ws-head {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 24px 24px 16px;
}

.workshop-card .ws-logo {
  width: 64px;
  height: 64px;
  border-radius: 14px;
  object-fit: cover;
  flex-shrink: 0;
  border: 1px solid var(--c-border);
}

.workshop-card .ws-name {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 4px;
}

.workshop-card .ws-type {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 20px;
  font-size: 12px;
  background: var(--c-primary-light);
  color: var(--c-primary);
  font-weight: 600;
}

.workshop-card .ws-body {
  padding: 0 24px 20px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.workshop-card .ws-desc {
  font-size: 14px;
  color: var(--c-text-light);
  line-height: 1.7;
  flex: 1;
  margin-bottom: 14px;
}

.workshop-card .ws-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}

.workshop-card .ws-tag {
  padding: 2px 10px;
  border-radius: 20px;
  font-size: 12px;
  background: var(--c-bg-alt);
  color: var(--c-text-light);
  border: 1px solid var(--c-border);
}

.workshop-card .ws-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 14px;
  border-top: 1px solid var(--c-border);
}

.workshop-card .ws-version {
  font-size: 12px;
  color: var(--c-text-light);
}

.ws-status {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
}

.ws-status.online { background: var(--c-primary-light); color: var(--c-primary); }
.ws-status.beta { background: #fff3e0; color: #f57c00; }
.ws-status.dev { background: #e3f2fd; color: #1976d2; }

/* ===== 后台课程列表 ===== */
.admin-course-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 16px;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  margin-bottom: 10px;
  background: #fff;
  transition: var(--transition);
}

.admin-course-row:hover {
  border-color: var(--c-primary);
  box-shadow: var(--c-shadow);
}

.admin-course-row .course-row-left {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
  flex: 1;
}

.admin-course-row .course-row-title {
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.admin-course-row .course-row-actions {
  display: flex;
  gap: 8px;
  flex-shrink: 0;
}

.admin-course-editor {
  border: 1px solid var(--c-primary);
  border-radius: var(--radius-sm);
  padding: 16px;
  margin-bottom: 10px;
  background: #fff;
}

/* 主题色配置 */
.theme-presets {
  display: flex;
  gap: 12px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.theme-swatch {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border: 2px solid var(--c-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  background: #fff;
  transition: var(--transition);
  font-size: 14px;
}

.theme-swatch:hover {
  border-color: var(--c-text-light);
}

.theme-swatch.active {
  border-color: var(--c-primary);
}

.theme-swatch .swatch-color {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  flex-shrink: 0;
}

/* ===== 春早课堂 ===== */
.class-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.class-card {
  border-radius: var(--radius);
  overflow: hidden;
  background: #fff;
  box-shadow: var(--c-shadow);
  transition: var(--transition);
}

.class-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--c-shadow-hover);
}

.class-card .class-cover {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.class-card .class-body {
  padding: 20px;
}

.class-card .class-level {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 12px;
  margin-bottom: 8px;
}

.class-level.entry { background: #e3f2fd; color: #1976d2; }
.class-level.intermediate { background: #fff3e0; color: #f57c00; }
.class-level.advanced { background: #fce4ec; color: #c62828; }

.class-card .class-title {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 8px;
}

.class-card .class-meta {
  font-size: 13px;
  color: var(--c-text-light);
  margin-bottom: 10px;
}

.class-card .class-desc {
  font-size: 14px;
  color: var(--c-text-light);
  line-height: 1.6;
}

/* ===== 加入我们 ===== */
.join-intro {
  text-align: center;
  font-size: 17px;
  color: var(--c-text-light);
  max-width: 640px;
  margin: 0 auto 56px;
}

.req-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 64px;
}

.req-card {
  text-align: center;
  padding: 32px 20px;
  border-radius: var(--radius);
  background: #fff;
  box-shadow: var(--c-shadow);
}

.req-card .req-icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--c-primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  font-size: 24px;
}

.req-card .req-title {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 8px;
}

.req-card .req-desc {
  font-size: 14px;
  color: var(--c-text-light);
}

.dept-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 64px;
}

.dept-card {
  padding: 24px;
  border-radius: var(--radius);
  background: #fff;
  border: 1px solid var(--c-border);
  transition: var(--transition);
}

.dept-card:hover {
  border-color: var(--c-primary);
  box-shadow: var(--c-shadow);
}

.dept-card .dept-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}

.dept-card .dept-name {
  font-size: 17px;
  font-weight: 700;
}

.dept-badge {
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 12px;
}

.dept-badge.open { background: var(--c-primary-light); color: var(--c-primary); }
.dept-badge.closed { background: #f5f5f5; color: #999; }

.dept-card .dept-desc {
  font-size: 14px;
  color: var(--c-text-light);
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 64px;
}

.step-card {
  text-align: center;
  position: relative;
  padding: 28px 16px;
}

.step-card .step-num {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--c-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 700;
  margin: 0 auto 16px;
}

.step-card .step-title {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 8px;
}

.step-card .step-desc {
  font-size: 13px;
  color: var(--c-text-light);
}

.join-contact {
  text-align: center;
  padding: 40px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--c-primary-light), var(--c-accent-light));
}

.join-contact h3 {
  font-size: 20px;
  margin-bottom: 20px;
}

.join-contact-items {
  display: flex;
  justify-content: center;
  gap: 40px;
  flex-wrap: wrap;
}

.join-contact-item {
  text-align: center;
}

.join-contact-item .label {
  font-size: 13px;
  color: var(--c-text-light);
  margin-bottom: 4px;
}

.join-contact-item .value {
  font-size: 16px;
  font-weight: 600;
  color: var(--c-primary);
}

/* ===== 其他页面 ===== */
.simple-content {
  max-width: 800px;
  margin: 0 auto;
}

.simple-content h2 {
  font-size: 22px;
  margin: 32px 0 16px;
  font-weight: 700;
}

.simple-content h2:first-child {
  margin-top: 0;
}

.simple-content p {
  font-size: 15px;
  line-height: 1.9;
  margin-bottom: 14px;
  color: var(--c-text);
}

/* 其他页面富文本：列表 / 图片 / 视频 / 链接 / 引用 / 分割线 / 小标题 */
.simple-content h3 {
  font-size: 17px;
  font-weight: 700;
  margin: 20px 0 10px;
}
.simple-content ul, .simple-content ol {
  padding-left: 24px;
  margin-bottom: 14px;
}
.simple-content li {
  font-size: 15px;
  line-height: 1.9;
  margin-bottom: 6px;
}
.simple-content img {
  max-width: 100%;
  border-radius: var(--radius-sm);
  margin: 12px 0;
}
.simple-content video {
  max-width: 100%;
  width: 100%;
  border-radius: var(--radius-sm);
  margin: 12px 0;
  display: block;
  background: #000;
}
.simple-content a {
  color: var(--c-primary);
  text-decoration: underline;
}
.simple-content blockquote {
  border-left: 3px solid var(--c-primary);
  padding: 8px 16px;
  margin: 12px 0;
  background: var(--c-bg-alt);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}
.simple-content hr {
  border: none;
  border-top: 1px solid var(--c-border);
  margin: 20px 0;
}

.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
  overflow: hidden;
}

.faq-q {
  padding: 18px 24px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: #fff;
  transition: var(--transition);
}

.faq-q:hover {
  background: var(--c-bg-alt);
}

.faq-q::after {
  content: '+';
  font-size: 20px;
  color: var(--c-primary);
  transition: var(--transition);
}

.faq-item.open .faq-q::after {
  transform: rotate(45deg);
}

.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.faq-item.open .faq-a {
  max-height: 300px;
}

.faq-a-inner {
  padding: 0 24px 18px;
  font-size: 14px;
  color: var(--c-text-light);
  line-height: 1.8;
}

/* ===== Footer ===== */
.footer {
  background: var(--c-text);
  color: rgba(255, 255, 255, 0.7);
  padding: 40px 0;
  text-align: center;
  font-size: 14px;
}

.footer a {
  color: rgba(255, 255, 255, 0.7);
}

.footer a:hover {
  color: #fff;
}

/* ===== 后台管理 ===== */
.admin-layout {
  display: flex;
  min-height: 100vh;
}

.admin-sidebar {
  width: 240px;
  background: var(--c-text);
  color: #fff;
  padding: 24px 0;
  position: fixed;
  top: 0;
  left: 0;
  height: 100vh;
  overflow-y: auto;
  z-index: 100;
}

.admin-sidebar .admin-brand {
  padding: 0 24px 24px;
  font-size: 18px;
  font-weight: 700;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  margin-bottom: 16px;
}

.admin-sidebar .admin-nav-item {
  display: block;
  padding: 12px 24px;
  color: rgba(255, 255, 255, 0.7);
  font-size: 14px;
  cursor: pointer;
  transition: var(--transition);
  border-left: 3px solid transparent;
}

.admin-sidebar .admin-nav-item:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.05);
}

.admin-sidebar .admin-nav-item.active {
  color: #fff;
  background: rgba(76, 175, 122, 0.15);
  border-left-color: var(--c-primary);
}

.admin-main {
  margin-left: 240px;
  flex: 1;
  padding: 32px;
  background: var(--c-bg-alt);
}

.admin-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

.admin-header h1 {
  font-size: 24px;
  font-weight: 700;
}

.admin-panel {
  display: none;
}

.admin-panel.active {
  display: block;
}

.admin-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 20px;
  box-shadow: var(--c-shadow);
}

.admin-card h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--c-border);
}

.admin-field {
  margin-bottom: 16px;
}

.admin-field label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--c-text);
}

.admin-field input,
.admin-field textarea,
.admin-field select {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-family: inherit;
  outline: none;
  transition: var(--transition);
}

.admin-field input:focus,
.admin-field textarea:focus,
.admin-field select:focus {
  border-color: var(--c-primary);
  box-shadow: 0 0 0 3px rgba(76, 175, 122, 0.1);
}

.admin-field textarea {
  resize: vertical;
  min-height: 80px;
}

.admin-list-item {
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  padding: 16px;
  margin-bottom: 12px;
  background: var(--c-bg-alt);
}

.admin-list-item .item-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.admin-list-item .item-header strong {
  font-size: 14px;
}

.admin-btn {
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  cursor: pointer;
  border: none;
  transition: var(--transition);
}

.admin-btn-danger {
  background: #e53935;
  color: #fff;
}

.admin-btn-danger:hover {
  background: #c62828;
}

.admin-btn-add {
  background: var(--c-primary);
  color: #fff;
  padding: 8px 20px;
  margin-bottom: 16px;
}

.admin-btn-add:hover {
  background: var(--c-primary-dark);
}

/* 与「添加」按钮同尺寸/同形状，但保持中性（不填充绿色），仅作配色区分 */
.admin-btn-ghost {
  background: transparent;
  color: var(--c-text);
  border: 1px solid var(--c-border);
  padding: 8px 20px;
}

.admin-btn-ghost:hover {
  border-color: var(--c-primary);
  color: var(--c-primary);
}

/* 添加 / 排序 两个按钮同处一行时：等高、垂直居中，去掉「添加」按钮自带的底部外边距 */
.admin-btn-row {
  align-items: center;
}

.admin-btn-row .admin-btn-add {
  margin-bottom: 0;
}

.admin-btn-save {
  background: var(--c-primary);
  color: #fff;
  padding: 10px 28px;
  font-size: 15px;
}

.admin-login {
  max-width: 360px;
  margin: 80px auto;
  background: #fff;
  border-radius: var(--radius);
  padding: 40px;
  box-shadow: var(--c-shadow-hover);
}

.admin-login h2 {
  text-align: center;
  margin-bottom: 24px;
}

.admin-toast {
  position: fixed;
  bottom: 32px;
  right: 32px;
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  color: #fff;
  font-size: 14px;
  z-index: 9999;
  opacity: 0;
  transform: translateY(20px);
  transition: var(--transition);
}

.admin-toast.show {
  opacity: 1;
  transform: translateY(0);
}

.admin-toast.success { background: var(--c-primary); }
.admin-toast.error { background: #e53935; }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .photo-grid { grid-template-columns: repeat(2, 1fr); }
  .material-grid { grid-template-columns: repeat(2, 1fr); }
  .product-grid { grid-template-columns: repeat(3, 1fr); }
  .class-grid { grid-template-columns: repeat(2, 1fr); }
  .workshop-grid { grid-template-columns: repeat(2, 1fr); }
  .req-grid { grid-template-columns: repeat(2, 1fr); }
  .dept-grid { grid-template-columns: repeat(2, 1fr); }
  .steps-grid { grid-template-columns: repeat(2, 1fr); }
  .plaza-post { grid-template-columns: 1fr; }
  .plaza-post .post-body { padding: 24px; }
  /* 单列时图片通栏，竖图按屏高限幅，避免一张图占掉整屏 */
  .plaza-post.ratio-portrait .post-img { max-height: 60vh; }
  .plaza-post.ratio-square .post-img { max-height: 70vh; }
  .mat-detail { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-links.mobile-open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--c-border);
    padding: 16px;
    gap: 4px;
  }
  .photo-grid { grid-template-columns: 1fr; }
  .material-grid { grid-template-columns: 1fr; }
  .product-grid { grid-template-columns: repeat(2, 1fr); }
  .class-grid { grid-template-columns: 1fr; }
  .workshop-grid { grid-template-columns: 1fr; }
  .req-grid { grid-template-columns: 1fr; }
  .dept-grid { grid-template-columns: 1fr; }
  .steps-grid { grid-template-columns: 1fr; }
  .hero-content h1 { font-size: 28px; }
  .admin-sidebar { width: 60px; }
  .admin-sidebar .admin-brand { font-size: 0; padding: 0 0 16px; }
  .admin-sidebar .admin-nav-item { padding: 12px; text-align: center; font-size: 0; }
  .admin-main { margin-left: 60px; padding: 16px; }
  .mobile-menu-btn { display: block !important; }
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  font-size: 24px;
  cursor: pointer;
  color: var(--c-text);
}

/* ===== 合照横向滚动 ===== */
/* 布局改为：外层 flex 一行 = [上一张] [图片区] [下一张]
   旧写法把箭头 absolute 放进 .photo-carousel（overflow:hidden）里并给 left/right:-8px，
   于是箭头被裁的同时又压在第一张图上；现在箭头是独立 flex 成员，
   不在裁剪盒内 -> 不会被 overflow 裁掉、不需要 z-index 抢层级 -> 点击始终有效，
   且与图片区并排自带上下居中。位移比例不至于把图片挤扁的关键：flex:1 + min-width:0 */
.photo-carousel-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
}

.photo-carousel {
  position: relative;
  overflow: hidden;
  flex: 1;
  min-width: 0;
}

.photo-carousel-track {
  display: flex;
  gap: 20px;
  transition: transform 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  will-change: transform;
}

.photo-carousel-track .photo-card {
  flex: 0 0 calc((100% - 60px) / 4);
  min-width: 0;
}

/* 尺寸与外观保持原样；只去掉旧的 absolute / left:-8px / right:-8px / z-index。
   transition 从 all 收窄到具体属性：垂直居中由 JS 改 transform 实现，
   若参与 all 过渡，首次对齐会变成一段 0.3s 的滑动动画 */
.photo-carousel-btn {
  flex: 0 0 auto;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.95);
  border: 1px solid var(--c-border);
  box-shadow: var(--c-shadow-hover);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: var(--c-text);
  transition: background 0.3s ease, color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.photo-carousel-btn:hover {
  background: var(--c-primary);
  color: #fff;
  border-color: var(--c-primary);
}

.photo-carousel-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

/* 窄屏：把箭头和间距收小一点，尽量把宽度让给照片区（不影响自动播放与切换逻辑） */
@media (max-width: 640px) {
  .photo-carousel-wrap { gap: 8px; }
  .photo-carousel-btn { width: 36px; height: 36px; font-size: 16px; }
}

.photo-carousel-dots {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 24px;
}

.photo-carousel-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--c-border);
  cursor: pointer;
  transition: var(--transition);
}

.photo-carousel-dot.active {
  background: var(--c-primary);
  width: 24px;
  border-radius: 4px;
}

/* ===== 照片墙 ===== */
.photo-wall-section {
  padding: 64px 0;
  background: linear-gradient(135deg, #f8f9fa 0%, #fef0f5 100%);
  overflow: hidden;
}

.photo-wall {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 12px;
}

.photo-wall-item {
  position: relative;
  aspect-ratio: 1;
  border-radius: var(--radius-sm);
  overflow: hidden;
  cursor: pointer;
  box-shadow: var(--c-shadow);
  opacity: 0;
  transform: scale(0.8) translateY(30px);
  animation: wallFadeIn 0.6s ease forwards;
}

.photo-wall-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.photo-wall-item:hover img {
  transform: scale(1.12);
}

/* ===== 后台照片墙网格 ===== */
.wall-admin-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 12px;
  margin-top: 16px;
}

.wall-admin-item {
  position: relative;
  aspect-ratio: 1;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid var(--c-border);
  background: var(--c-bg-alt);
}

.wall-admin-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.wall-admin-item .wall-delete-x {
  position: absolute;
  top: 4px;
  right: 4px;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: rgba(229, 57, 53, 0.9);
  color: #fff;
  border: none;
  font-size: 14px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.2s ease;
  z-index: 5;
}

.wall-admin-item:hover .wall-delete-x {
  opacity: 1;
}

.wall-admin-add {
  aspect-ratio: 1;
  border: 2px dashed var(--c-border);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 6px;
  cursor: pointer;
  color: var(--c-text-light);
  font-size: 13px;
  transition: var(--transition);
  background: var(--c-bg-alt);
}

.wall-admin-add:hover {
  border-color: var(--c-primary);
  color: var(--c-primary);
  background: var(--c-primary-light);
}

.wall-admin-add .add-icon {
  font-size: 28px;
  line-height: 1;
}

@keyframes wallFadeIn {
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

/* ===== 付费标识 ===== */
.mat-paid-badge {
  position: absolute;
  top: 10px;
  right: 10px;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  z-index: 5;
}

.mat-paid-badge.paid {
  background: linear-gradient(135deg, #ff9800, #f57c00);
  color: #fff;
  box-shadow: 0 2px 8px rgba(245, 124, 0, 0.3);
}

.mat-paid-badge.free {
  background: rgba(76, 175, 122, 0.9);
  color: #fff;
}

.material-card {
  position: relative;
}

.mat-price {
  font-size: 22px;
  font-weight: 800;
  color: #f57c00;
  margin-bottom: 16px;
}

.mat-price.free {
  color: var(--c-primary);
}

/* ===== 课程类型标识 ===== */
.class-type-badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  margin-left: 6px;
}

.class-type-badge.video { background: #e8f5e9; color: #2e7d32; }
.class-type-badge.text { background: #e3f2fd; color: #1565c0; }

.class-card {
  cursor: pointer;
}

/* ===== 课程详情页 ===== */
.course-detail-layout {
  display: grid;
  gap: 32px;
  align-items: start;
}

.course-detail-layout.video-layout {
  grid-template-columns: 1fr 320px;
}

.course-detail-layout.text-layout {
  grid-template-columns: 280px 1fr;
}

.course-video-wrapper {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--c-shadow);
  background: #000;
  /* 16:9 高度由容器决定，而不是等视频元数据。
     否则取封面的分支用 preload="none"、根本不会加载元数据，
     video 的高度会是 0，poster 只能露出顶部一条（看起来像"没显示封面"） */
  aspect-ratio: 16 / 9;
  /* 章节封面遮罩的定位基准。
     注意不能把坐标基准放在 <video> 上：video 是替换元素、内部布局特殊，
     absolute 子元素定位到它身上时各浏览器表现不一致，
     套在容器上（与 video 同尺寸）才是可靠的 */
  position: relative;
}

.course-video-wrapper video {
  width: 100%;
  height: 100%;
  display: block;
  /* 未播放时显示的是封面（后台设置的 poster，或视频画面第一帧）：
     contain 保证封面完整不裁切 */
  object-fit: contain;
  background: #000;
}

/* 带封面的视频（后台设置过章节封面）用 cover 填满容器，观感更接近常规播放器封面 */
.course-video-wrapper video[poster]:not([poster=""]) {
  object-fit: cover;
}

/* ===== 章节封面遮罩（后台设置过封面时使用） ===== */
/* 盖在视频之上，保证"真正开始播放前一直显示封面"。
   即使浏览器加载元数据后把真实帧画了出来，用户看到的仍是封面。
   关键：遮罩本身 pointer-events:none（点击穿透到下面的 video 原生控件），
   但播放按钮单独 pointer-events:auto —— 用户点按钮就能播 */
.course-video-cover {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background: #000;
  opacity: 1;
  transition: opacity 0.4s ease;
}

/* 无封面分支：遮罩透明，露出下面的视频第一帧，只显示播放按钮 + 时长 */
.course-video-cover.is-transparent {
  background: transparent;
}

.course-video-cover img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
}

/* 中央播放按钮：大圆 + 半透明底 + 白色三角，一眼识别"这是可播放的视频" */
.course-play-btn {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 2;
  pointer-events: auto;
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.55);
  border: 2px solid rgba(255, 255, 255, 0.85);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  padding: 0;
  outline: none;
  -webkit-tap-highlight-color: transparent;
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.course-play-btn:hover,
.course-play-btn:focus-visible {
  background: rgba(0, 0, 0, 0.72);
  border-color: #fff;
  transform: translate(-50%, -50%) scale(1.08);
}

.course-play-btn:active {
  transform: translate(-50%, -50%) scale(0.96);
}

.course-play-btn svg {
  width: 28px;
  height: 28px;
  margin-left: 3px; /* 视觉补偿：三角形重心偏左 */
}

/* 右下角时长徽标：深色药丸 + 白字，类似 B 站/YouTube 缩略图 */
.course-duration-badge {
  position: absolute;
  bottom: 8px;
  right: 8px;
  z-index: 2;
  pointer-events: none;
  background: rgba(0, 0, 0, 0.72);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  padding: 2px 6px;
  border-radius: 4px;
  line-height: 1.4;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.3px;
  display: none; /* 元数据到达后才显示 */
}

/* 用户点了播放：揭开封面 */
.course-video-cover.is-hidden {
  opacity: 0;
}

@media (max-width: 640px) {
  .course-play-btn {
    width: 48px;
    height: 48px;
  }
  .course-play-btn svg {
    width: 22px;
    height: 22px;
  }
  .course-duration-badge {
    font-size: 11px;
    bottom: 6px;
    right: 6px;
    padding: 1px 5px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .course-video-cover { transition: none; }
  .course-play-btn { transition: none; }
}

.course-video-placeholder {
  width: 100%;
  aspect-ratio: 16 / 9;
  background: linear-gradient(135deg, #1a1a2e, #16213e);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  color: #fff;
  gap: 12px;
}

.course-video-placeholder .play-icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  border: 2px solid rgba(255, 255, 255, 0.3);
}

.course-sidebar {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--c-shadow);
  overflow: hidden;
}

.course-sidebar-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--c-border);
  font-size: 16px;
  font-weight: 700;
}

.course-chapter-list {
  list-style: none;
  max-height: 500px;
  overflow-y: auto;
}

.course-chapter-item {
  padding: 14px 20px;
  cursor: pointer;
  transition: var(--transition);
  border-bottom: 1px solid #f5f5f5;
  display: flex;
  align-items: center;
  gap: 12px;
}

.course-chapter-item:hover {
  background: var(--c-primary-light);
}

.course-chapter-item.active {
  background: var(--c-primary-light);
  color: var(--c-primary);
  font-weight: 600;
}

.course-chapter-item .chapter-num {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--c-bg-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 600;
  flex-shrink: 0;
}

.course-chapter-item.active .chapter-num {
  background: var(--c-primary);
  color: #fff;
}

.course-chapter-item .chapter-info {
  flex: 1;
  min-width: 0;
}

.course-chapter-item .chapter-title {
  font-size: 14px;
  margin-bottom: 2px;
}

.course-chapter-item .chapter-duration {
  font-size: 12px;
  color: var(--c-text-light);
}

.course-content-area {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--c-shadow);
  padding: 32px;
  min-height: 400px;
}

.course-section-nav {
  list-style: none;
}

.course-section-item {
  padding: 14px 20px;
  cursor: pointer;
  transition: var(--transition);
  border-bottom: 1px solid #f5f5f5;
  font-size: 14px;
}

.course-section-item:hover {
  background: var(--c-primary-light);
}

.course-section-item.active {
  background: var(--c-primary-light);
  color: var(--c-primary);
  font-weight: 600;
  border-left: 3px solid var(--c-primary);
}

.course-rich-content {
  font-size: 15px;
  line-height: 1.9;
  color: var(--c-text);
}

.course-rich-content h2 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--c-text);
}

.course-rich-content p {
  margin-bottom: 14px;
}

.course-back-link {
  margin-bottom: 20px;
}

.course-back-link a {
  color: var(--c-primary);
  font-size: 14px;
}

.course-detail-header {
  margin-bottom: 24px;
}

.course-detail-header h1 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 8px;
}

.course-detail-header .course-meta {
  font-size: 14px;
  color: var(--c-text-light);
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

@media (max-width: 1024px) {
  .photo-wall { grid-template-columns: repeat(4, 1fr); }
  .course-detail-layout.video-layout,
  .course-detail-layout.text-layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .photo-wall { grid-template-columns: repeat(3, 1fr); }
  .photo-carousel-track .photo-card {
    flex: 0 0 calc((100% - 20px) / 2);
  }
}

/* ===== 列表工具栏（搜索 + 筛选） ===== */
.list-toolbar {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.list-toolbar .mat-filter {
  margin-bottom: 0;
}

.search-box {
  position: relative;
  flex: 1;
  min-width: 200px;
  max-width: 320px;
}

.search-box input {
  width: 100%;
  padding: 9px 34px 9px 34px;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-family: inherit;
  color: var(--c-text);
  background: var(--c-bg);
  outline: none;
  transition: var(--transition);
}

.search-box input:focus {
  border-color: var(--c-primary);
  box-shadow: 0 0 0 3px var(--c-primary-light);
}

.search-box::before {
  content: "\1F50D";
  position: absolute;
  left: 11px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 13px;
  opacity: 0.45;
  pointer-events: none;
}

.search-box .search-clear {
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  width: 20px;
  height: 20px;
  border: none;
  border-radius: 50%;
  background: var(--c-border);
  color: var(--c-text);
  font-size: 12px;
  line-height: 1;
  cursor: pointer;
  display: none;
  align-items: center;
  justify-content: center;
}

.search-box.has-value .search-clear {
  display: flex;
}

.list-count {
  color: var(--c-text-light);
  font-size: 13px;
  margin-left: auto;
}

/* ===== 分页 ===== */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  margin-top: 32px;
  flex-wrap: wrap;
}

.page-btn {
  min-width: 36px;
  height: 36px;
  padding: 0 10px;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  background: var(--c-bg);
  color: var(--c-text);
  font-size: 14px;
  font-family: inherit;
  cursor: pointer;
  transition: var(--transition);
}

.page-btn:hover:not(:disabled):not(.active) {
  border-color: var(--c-primary);
  color: var(--c-primary);
}

.page-btn.active {
  background: var(--c-primary);
  color: #fff;
  border-color: var(--c-primary);
  font-weight: 600;
}

.page-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.page-ellipsis {
  color: var(--c-text-light);
  padding: 0 4px;
}

.page-info {
  color: var(--c-text-light);
  font-size: 13px;
  margin-left: 8px;
}

.list-empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: 60px 0;
  color: var(--c-text-light);
}

.list-empty .empty-title {
  font-size: 16px;
  margin-bottom: 6px;
  color: var(--c-text);
}

/* ===== 一刻广场：滚动加载的底部状态 ===== */
.plaza-scroll-footer {
  min-height: 48px;
  padding: 16px 0 8px;
}

.plaza-loading {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-size: 14px;
  color: var(--c-text-light);
}

.loading-spinner {
  width: 16px;
  height: 16px;
  border: 2px solid var(--c-border);
  border-top-color: var(--c-primary);
  border-radius: 50%;
  animation: plaza-spin 0.8s linear infinite;
}

@keyframes plaza-spin {
  to { transform: rotate(360deg); }
}

/* 全部加载完：底部固定显示的结束语 */
.plaza-end {
  text-align: center;
  font-size: 13px;
  color: var(--c-text-light);
  padding: 16px 0;
  border-top: 1px solid var(--c-border);
}

/* 文章页：动态已被收回时的占位提示 */
.post-withdrawn {
  text-align: center;
  padding: 80px 0;
  color: var(--c-text-light);
}

.post-withdrawn .empty-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--c-text);
  margin-bottom: 8px;
}

/* ===== 后台紧凑列表行（手风琴编辑） ===== */
.admin-list-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  margin-bottom: 10px;
  background: #fff;
  transition: var(--transition);
  gap: 10px;
  flex-wrap: wrap;
}

.admin-list-row:hover {
  border-color: var(--c-primary);
  box-shadow: var(--c-shadow);
}

.admin-list-row .row-left {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 1;
  min-width: 0;
  flex-wrap: wrap;
}

.admin-list-row .row-title {
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100%;
}

/* 后台列表中的下载/访问统计行 */
.dl-stat {
  display: inline-block;
  width: 100%;
  margin-top: 4px;
  font-size: 12px;
  color: var(--c-text-light);
  font-weight: 400;
}
.dl-stat b {
  color: var(--c-primary);
  font-weight: 600;
}

.admin-list-row .row-actions {
  display: flex;
  gap: 8px;
  flex-shrink: 0;
}

.row-cat {
  font-size: 12px;
  padding: 2px 10px;
  border-radius: 20px;
  background: var(--c-primary-light);
  color: var(--c-primary);
  white-space: nowrap;
}

.row-badge {
  font-size: 12px;
  padding: 2px 10px;
  border-radius: 20px;
  white-space: nowrap;
}

.row-badge.paid { background: #fff3e0; color: #e65100; }
.row-badge.free { background: #e8f5e9; color: #2e7d32; }
.row-badge.online { background: var(--c-primary-light); color: var(--c-primary); }
.row-badge.beta { background: #fff3e0; color: #f57c00; }
.row-badge.dev { background: #e3f2fd; color: #1976d2; }
/* 已收回：灰底区别于「已发布」，整行也做降饱和度处理 */
.row-badge.withdrawn { background: #eceff1; color: #607d8b; }

.admin-list-row.row-withdrawn {
  opacity: 0.72;
}

.admin-list-row.row-withdrawn .row-title {
  text-decoration: line-through;
  color: var(--c-text-light);
}

.admin-row-editor {
  border: 1px solid var(--c-primary);
  border-radius: var(--radius-sm);
  padding: 16px;
  margin-bottom: 10px;
  background: #fff;
}

/* 编辑区底部的「收回 / 重新发布」操作条 */
.admin-row-editor-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 4px;
  padding-top: 12px;
  border-top: 1px dashed var(--c-border);
}

.admin-row-editor-actions .post-status-hint {
  font-size: 13px;
  color: var(--c-text-light);
  line-height: 1.6;
}

.admin-row-editor-actions .post-status-hint b.is-published { color: var(--c-primary); }
.admin-row-editor-actions .post-status-hint b.is-withdrawn { color: #607d8b; }

.admin-row-editor-actions .post-status-hint em {
  display: block;
  font-style: normal;
  font-size: 12px;
  margin-top: 2px;
}

.admin-row-editor-actions .admin-btn { white-space: nowrap; }

/* ===== 发布作者：可搜索下拉 + 手动新增 ===== */
.author-combo {
  position: relative;
}

.author-combo-input {
  width: 100%;
}

.author-combo-list {
  position: absolute;
  z-index: 30;
  left: 0;
  right: 0;
  top: calc(100% + 4px);
  max-height: 220px;
  overflow-y: auto;
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.08);
  padding: 4px;
}

.author-combo-item {
  display: block;
  width: 100%;
  text-align: left;
  padding: 8px 12px;
  border: none;
  background: transparent;
  border-radius: 6px;
  font-size: 14px;
  color: var(--c-text);
  cursor: pointer;
  transition: background 0.2s ease;
}

.author-combo-item:hover {
  background: var(--c-primary-light);
  color: var(--c-primary);
}

.author-combo-add {
  border-top: 1px dashed var(--c-border);
  border-radius: 0 0 6px 6px;
  color: var(--c-primary);
  font-weight: 600;
}

.author-combo-empty {
  padding: 10px 12px;
  font-size: 13px;
  color: var(--c-text-light);
}

.admin-save-hint {
  color: var(--c-text-light);
  font-size: 12px;
  margin-top: 8px;
}

/* ===== 生产车间卡片：标题即跳转入口（后台配置 link 后可点击，新标签页打开） ===== */
a.workshop-card.ws-card-link {
  display: flex;
  color: inherit;
  text-decoration: none;
  cursor: pointer;
}

/* 跳转入口的悬停反馈：只有文字颜色变化 + 平滑过渡。
   刻意不使用 underline / border-top / border-bottom / outline / box-shadow 绘制任何线条：
   1) 颜色属于绘制阶段属性，不参与布局计算，默认态与悬停态盒子尺寸完全一致，不会跳动；
   2) 线条类装饰（下划线、边框、伪元素横线）会引入额外的行盒/边框盒高度和外扩像素，
      导致文字基线偏移或卡片高度变化；
   3) 统一显式关闭 text-decoration / border，避免浏览器默认链接样式或后续规则被继承进来。 */
a.workshop-card.ws-card-link .ws-name {
  text-decoration: none;
  border: 0;
  /* 注意：--transition 展开是 "all 0.3s ease"，套在 color 后面会变成非法值导致整条声明失效，
     所以这里显式写成 只过渡 color，避免线条类属性被顺带过渡 */
  transition: color 0.3s ease;
}

a.workshop-card.ws-card-link:hover .ws-name,
a.workshop-card.ws-card-link:active .ws-name {
  color: var(--c-primary);
  text-decoration: none;
  border: 0;
}

a.workshop-card.ws-card-link:hover,
a.workshop-card.ws-card-link:active {
  outline: 0;
  border: 0;
}

/* 键盘可达性：焦点提示只出现在 :focus-visible（键盘 Tab 导航），鼠标悬停不会有轮廓线。
   该规则写在 hover 之后，键盘聚焦时优先级高于上面的 outline: 0。 */
a.workshop-card.ws-card-link:focus-visible {
  outline: 2px solid var(--c-primary);
  outline-offset: 2px;
}

a.workshop-card.ws-card-link:focus-visible .ws-name {
  color: var(--c-primary);
}

/* 后台字段下方的补充说明文字 */
.admin-field-hint {
  color: var(--c-text-light);
  font-size: 12px;
  line-height: 1.6;
  margin-top: 6px;
}

/* ===== 一刻广场：可点击条目 ===== */
a.plaza-post-link {
  display: block;
  color: inherit;
  text-decoration: none;
}

.plaza-post .post-more {
  margin-top: 14px;
  font-size: 13px;
  font-weight: 600;
  color: var(--c-primary);
}

/* 同样只做颜色变化，不引入任何线条装饰 */
a.plaza-post-link .post-title {
  text-decoration: none;
  border: 0;
  transition: color 0.3s ease;
}

a.plaza-post-link:hover .post-title,
a.plaza-post-link:active .post-title {
  color: var(--c-primary);
  text-decoration: none;
  border: 0;
}

a.plaza-post-link:hover,
a.plaza-post-link:active {
  outline: 0;
}

a.plaza-post-link:focus-visible {
  outline: 2px solid var(--c-primary);
  outline-offset: 2px;
}

/* ===== 动态文章页 ===== */
.post-detail-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 40px;
  align-items: start;
}

.post-detail-main {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--c-shadow);
  overflow: hidden;
}

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

.post-detail-main .post-detail-body {
  padding: 32px;
}

.post-detail-main h1 {
  font-size: 26px;
  font-weight: 700;
  margin-bottom: 12px;
  line-height: 1.4;
}

.post-detail-meta {
  font-size: 13px;
  color: var(--c-text-light);
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--c-border);
}

.post-detail-side {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--c-shadow);
  padding: 20px;
  position: sticky;
  top: 90px;
}

.post-detail-side h3 {
  font-size: 16px;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--c-border);
}

.side-post-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.side-post-item {
  display: flex;
  gap: 12px;
  padding: 10px;
  border-radius: 10px;
  color: inherit;
  text-decoration: none;
  transition: var(--transition);
}

.side-post-item:hover {
  background: var(--c-bg-alt);
}

.side-post-item.active {
  background: var(--c-primary-light);
}

.side-post-item img {
  width: 72px;
  height: 56px;
  object-fit: cover;
  border-radius: 8px;
  flex-shrink: 0;
}

.side-post-item .side-title {
  font-size: 13px;
  font-weight: 600;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.side-post-item .side-date {
  font-size: 12px;
  color: var(--c-text-light);
  margin-top: 4px;
}

@media (max-width: 900px) {
  .post-detail-layout {
    grid-template-columns: 1fr;
  }
  .post-detail-side {
    position: static;
  }
}

/* ===== 后台：模块折叠 + 拖拽排序 ===== */
/* 供 js/admin-sortable.js 使用；卡片头部结构见 admin.html 的 .admin-sort-card */

.admin-sort-card {
  padding: 0;
  overflow: hidden;
}

.admin-sort-card .admin-card-head {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 20px;
  background: #fff;
  border-radius: var(--radius) var(--radius) 0 0;
}

.admin-sort-card .admin-card-head .card-title {
  flex: 1;
  min-width: 0;
  margin: 0;
  padding: 0;
  border-bottom: none;
  font-size: 16px;
}

.admin-sort-card .admin-card-body {
  padding: 4px 24px 24px;
}

.admin-sort-card.collapsed .admin-card-body {
  display: none;
}

.admin-sort-card.collapsed {
  padding-bottom: 0;
}

/* 拖拽把手：鼠标、触屏、键盘都从这里发起 */
.drag-handle {
  flex: none;
  padding: 4px 7px;
  border: none;
  border-radius: 6px;
  background: transparent;
  color: var(--c-text-light);
  font-size: 13px;
  line-height: 1;
  letter-spacing: 1px;
  cursor: grab;
  transition: var(--transition);
  touch-action: none; /* 触屏按住把手时不带动页面滚动 */
}

.drag-handle:hover,
.drag-handle:focus-visible {
  background: var(--c-bg-alt);
  color: var(--c-text);
}

.drag-handle:focus-visible {
  outline: 2px solid var(--c-primary);
  outline-offset: 2px;
}

.drag-handle:active {
  cursor: grabbing;
}

.card-collapse {
  flex: none;
  width: 28px;
  height: 28px;
  border: 1px solid var(--c-border);
  border-radius: 6px;
  background: #fff;
  color: var(--c-text-light);
  font-size: 13px;
  line-height: 1;
  cursor: pointer;
  transition: transform 0.2s ease, background 0.2s ease;
}

.card-collapse:hover {
  background: var(--c-bg-alt);
  color: var(--c-text);
}

.card-collapse:focus-visible {
  outline: 2px solid var(--c-primary);
  outline-offset: 2px;
}

.admin-sort-card.collapsed .card-collapse {
  transform: rotate(-90deg);
}

.admin-sort-card.collapsed .admin-card-head {
  border-radius: var(--radius);
}

/* 序号输入：卡片级与列表项共用同一套外观 */
.card-order-field {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin: 0;
  font-size: 12px;
  font-weight: 400;
  color: var(--c-text-light);
}

.card-order-input,
.sort-index-input {
  width: 58px;
  padding: 4px 6px;
  text-align: center;
  border: 1px solid var(--c-border);
  border-radius: 6px;
  font-size: 13px;
  font-family: inherit;
  background: #fff;
  color: var(--c-text);
}

.card-order-input:focus,
.sort-index-input:focus {
  border-color: var(--c-primary);
  outline: none;
  box-shadow: 0 0 0 3px rgba(76, 175, 122, 0.15);
}

.item-title-group {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.item-index-field {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--c-text-light);
}

/* 只作用于接入了排序能力的列表项，其它面板的 item-header 保持原样 */
.sortable-item .item-header {
  flex-wrap: wrap;
  gap: 8px 12px;
}

/* 按钮组始终靠右，序号紧跟标题之后 */
.sortable-item .item-header > div:last-of-type {
  margin-left: auto;
}

/* 占位符：拖拽过程中标示「松手后会落到这里」 */
.sort-placeholder {
  border: 2px dashed var(--c-primary);
  border-radius: var(--radius-sm);
  background: var(--c-primary-light);
  box-sizing: border-box;
}

.sortable-list > .sort-placeholder {
  margin-bottom: 12px;
}

#panel-home > .sort-placeholder {
  margin-bottom: 20px;
}

.sortable-grid > .sort-placeholder {
  margin-bottom: 0;
}

/* 被拖起来的元素：脱离文档流浮动，轻微倾斜 + 投影表达「拎起来」 */
.is-dragging {
  opacity: 0.95;
  border-color: var(--c-primary);
  box-shadow: 0 14px 32px rgba(0, 0, 0, 0.18);
  transform: rotate(0.8deg);
  transition: none;
}

body.sortable-dragging-active {
  cursor: grabbing;
  user-select: none;
}

/* 照片墙：网格里的把手与序号徽标 */
.wall-admin-item {
  position: relative;
}

.wall-drag-handle {
  position: absolute;
  top: 4px;
  left: 4px;
  z-index: 6;
  padding: 2px 7px;
  border: none;
  border-radius: 4px;
  background: rgba(0, 0, 0, 0.45);
  color: #fff;
  font-size: 13px;
  line-height: 1.2;
  cursor: grab;
  opacity: 0;
  transition: opacity 0.2s ease;
  touch-action: none;
}

.wall-admin-item:hover .wall-drag-handle,
.wall-drag-handle:focus-visible {
  opacity: 1;
}

.wall-index-badge {
  position: absolute;
  bottom: 4px;
  left: 4px;
  z-index: 5;
  padding: 1px 7px;
  border-radius: 10px;
  background: rgba(0, 0, 0, 0.5);
  color: #fff;
  font-size: 11px;
  line-height: 1.6;
}

/* 触屏没有 hover，把手需要常驻显示才能发起拖拽 */
@media (hover: none) {
  .wall-drag-handle {
    opacity: 1;
  }
}

/* 屏幕阅读器专用文本：排序组件用它播报位置变化 */
.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;
}

@media (max-width: 768px) {
  .admin-sort-card .admin-card-head {
    flex-wrap: wrap;
    gap: 8px;
  }
  .admin-sort-card .admin-card-head .card-title {
    flex-basis: calc(100% - 80px);
  }
  .admin-sort-card .admin-card-body {
    padding: 4px 16px 16px;
  }
  .admin-list-item.sortable-item .item-header > div:last-of-type {
    margin-left: 0;
  }
}

/* ===== 后台：编辑区内的子区块（文章 / 顶部区域） ===== */
.admin-sub-block {
  margin-top: 18px;
  padding: 16px 18px 6px;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  background: var(--c-bg-alt);
}

.admin-sub-block h4 {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 10px;
  padding-bottom: 8px;
  border-bottom: 1px dashed var(--c-border);
}

/* ===== 生产车间文章详情页 ===== */
.ws-detail-head {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  padding: 32px 32px 0;
}

.ws-detail-logo {
  width: 76px;
  height: 76px;
  flex: none;
  border-radius: 16px;
  object-fit: cover;
  background: var(--c-bg-alt);
}

.ws-detail-headinfo {
  flex: 1;
  min-width: 0;
}

.ws-detail-headinfo h1 {
  font-size: 26px;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 12px;
}

.ws-detail-desc {
  font-size: 14px;
  color: var(--c-text-light);
  margin-top: 12px;
}

/* 正文顶部的下载 / 访问区域：纯文本展示，移除背景色与左侧竖线，保持简洁 */
.ws-article-block {
  margin-bottom: 24px;
  padding: 4px 0;
  border: none;
  background: none;
}

.ws-block-text {
  min-width: 0;
  flex: 1;
}

.ws-block-title {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 4px;
}

.ws-block-desc {
  font-size: 13px;
  color: var(--c-text-light);
}

/* 产品名称与「立即访问 / 立即下载」按钮同行：按钮在名称右侧 */
.ws-detail-titlerow {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.ws-detail-titlerow h1 {
  margin-bottom: 0;
  flex: 1 1 auto;
  min-width: 0;
}

.ws-block-btn {
  flex: 0 0 auto;
  margin-left: auto;
}

@media (max-width: 600px) {
  .ws-detail-head {
    flex-direction: column;
    padding: 24px 20px 0;
  }
  .ws-detail-titlerow {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }
  .ws-block-btn {
    width: 100%;
    text-align: center;
  }
}