/* ==================== GCDF Site - 蜕变故事页特有样式 ==================== */

/* ==================== Tab Content ==================== */
.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

/* ==================== 干货科普列表页样式 ==================== */

/* Tab 导航 */
.article-list-section .tab-nav {
  justify-content: flex-start;
  gap: 0;
  width: 100%;
  margin-left: 0;
  margin-right: 0;
  margin-bottom: 49px;
}

.article-list-section .tab-nav-item {
  position: relative;
  padding: 18px 38px;
  margin-right: 16px;
  font-size: 24px;
  color: #2e3739;
  border-radius: 20px 20px 0 0;
}
.article-list-section .tab-nav-item i {
  position: absolute;
  width: 48px;
  height: 20px;
  background-color: #ffba00;
  border-radius: 50%;
  left: 30px;
  bottom: 12px;
  z-index: 1;
  display: none;
}

.article-list-section .tab-nav-item span {
  position: relative;
  z-index: 2;
}

.article-list-section .tab-nav-item:last-child {
  margin-right: 0;
}

.article-list-section .tab-nav-item.active, .article-list-section .tab-nav-item:hover {
  font-size: 24px;
  font-weight: bold;
  color: #fff;
}

.article-list-section .tab-nav-item.active i, .article-list-section .tab-nav-item:hover i {
  display: block;
}

/* ==================== 实操应用 - 课程卡片 ==================== */
.course-grid {
  font-size: 0;
}

.course-card {
  display: inline-block;
  vertical-align: top;
  width: 458px;
  cursor: pointer;
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  overflow: hidden;
  margin: 0 64px 58px 0;
}

.course-card:nth-of-type(3n) {
  margin-right: 0;
}

.course-card:hover {
  box-shadow: var(--shadow-hover);
}

/* 机构logo条 */
.course-card-org {
  background: var(--bg-gray);
  padding: 10px 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-bottom: 1px solid var(--border-color);
}

.course-card-org-logo {
  width: 28px;
  height: 28px;
  border-radius: 4px;
  background: var(--primary);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  font-weight: bold;
  flex-shrink: 0;
}

.course-card-org-name {
  font-size: 12px;
  color: var(--text-medium);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* 卡片主体 */
.course-card-body {
  padding: 20px;
}

.course-card-body img {
  display: block;
  width: 424px;
  height: 235px;
  margin-bottom: 26px;
  border-radius: 10px;
  box-shadow: var(--shadow);
}

.course-card-title {
  display: inline-block;
  padding: 6px 22px;
  font-size: 16px;
  color: #1db1be;
  margin-bottom: 12px;
  line-height: 1.4;
  background-color: #cefbff;
  border-radius: 10px;
}

.course-card-subtitle {
  font-size: 18px;
  font-weight: bold;
  color: #121212;
  line-height: 1.8;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.course-card-teacher {
  font-size: 13px;
  color: var(--text-light);
  margin-bottom: 16px;
}

.course-card-teacher span {
  color: var(--primary);
  font-weight: 600;
}

/* 预约直播按钮 */
.course-card-btn {
  display: block;
  width: 100%;
  padding: 10px 0;
  background: var(--secondary);
  color: var(--white);
  border: none;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.3s, transform 0.2s;
  text-align: center;
}

.course-card-btn:hover {
  background: var(--secondary-dark);
  transform: scale(1.02);
}

/* 卡片底部 */
.course-card-footer {
  padding: 12px 16px;
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.course-card-tag {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 500;
  background: rgba(0, 184, 176, 0.1);
  color: var(--primary);
}

.course-card-desc {
  font-size: 12px;
  color: var(--text-light);
  max-width: 60%;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ==================== 变现分享 - 双列卡片 ==================== */
.share-grid {
  font-size: 0;
}

.share-card {
  position: relative;
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  overflow: hidden;
  display: inline-block;
  vertical-align: top;
  padding: 14px 18px;
  width: 726px;
  margin: 0 58px 54px 0;
  cursor: pointer;
  box-sizing: border-box;
  border: 1px solid #bccbdd;
}

.share-card:nth-of-type(even) {
  margin-right: 0;
}

.share-card:hover {
  box-shadow: var(--shadow-hover);
}

.share-card-avatar {
  display: inline-block;
  width: 274px;
  height: 268px;
  vertical-align: top;
}
.share-card-avatar img {
  width: 274px;
  height: 268px;
  vertical-align: middle;
}

.share-card-content {
  display: inline-block;
  vertical-align: top;
  width: 412px;
  padding: 50px 0 0 36px;
}

.share-card-title {
  font-size: 18px;
  font-weight: 700;
  color: #121212;
  margin-bottom: 16px;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.share-card-excerpt {
  font-size: 14px;
  color: #5b5b5b;
  line-height: 1.6;
  margin-bottom: 12px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.share-card-date {
  position: absolute;
  font-size: 14px;
  bottom: 40px; 
  color: #5b5b5b;
}

/* ==================== 学员分享 - 列表 ==================== */

.student-item {
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: 20px 100px 12px 40px;
  border: 1px solid #bccbdd;
  font-size: 0;
  margin-bottom: 28px;
}

.student-item:hover {
  box-shadow: var(--shadow-hover);
}

.student-item-avatar {
  display: inline-block;
  vertical-align: middle;
  width: 196px;
  height: 65px;
  font-size: 0;
  border-right: 2px solid #e7ecf4;
}

.student-item-avatar img {
  display: inline-block;
  width: 58px;
  height: 65px;
  border-radius: 50%;
  vertical-align: middle;
}

.student-item-header {
  display: inline-block;
  vertical-align: middle;
  width: 130px;
  padding-left: 10px;
  box-sizing: border-box;
}

.student-item-content {
  display: inline-block;
  width: calc(100% - 198px);
  vertical-align: middle;
  padding-left: 34px;
  box-sizing: border-box;
}

.student-item-name {
  display: block;
  font-size: 18px;
  font-weight: 700;
  color: #121212;
}

.student-item-badge {
  display: block;
  font-size: 18px;
  font-weight: normal;
  color: #121212;
}

.student-item-title {
  font-size: 20px;
  font-weight: 600;
  color: #121212;
  margin-bottom: 12px;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.student-item-excerpt {
  font-size: 14px;
  color: #121212;
  line-height: 1.8;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ==================== 内容区 ==================== */
.content-section {
  width: 1512px;
  margin: 0 auto;
  padding: 40px 0 60px;
}