/* ===== 1. 全局基础样式 ===== */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@300;400;500;700&display=swap');

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

:root {
  --primary-color: #7CB9CB;
  --primary-light: #A8D5E2;
  --primary-dark: #5A9AAD;
  --secondary-color: #7BA05B;
  --secondary-light: #9BC278;
  --accent-color: #C73E3A;
  --accent-light: #D4625C;
  --accent-dark: #A6302C;
  --bg-color: #F8F6F0;
  --bg-white: #FFFFFF;
  --text-primary: #2C2C2C;
  --text-secondary: #4A4A4A;
  --text-muted: #7A7A7A;
  --border-color: #E0DED5;
  --border-light: #F0EEE6;
  --shadow-light: 0 2px 8px rgba(0,0,0,0.06);
  --shadow-hover: 0 4px 16px rgba(0,0,0,0.10);
  --shadow-card: 0 2px 12px rgba(0,0,0,0.05);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-full: 50%;
  --transition: all 0.3s ease;
  --max-width: 1200px;
  --nav-height: 60px;
}

body {
  font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-color);
  min-height: 100vh;
}

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

ul, ol {
  list-style: none;
}

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

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
  transition: var(--transition);
}

input, textarea {
  font-family: inherit;
  font-size: inherit;
}

/* ===== 2. 公共组件样式 ===== */

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

/* 页面内容包装器 */
.page-wrapper {
  min-height: calc(100vh - var(--nav-height));
  padding-top: var(--nav-height);
}

/* 导航栏 */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: var(--bg-white);
  box-shadow: var(--shadow-light);
  z-index: 1000;
}

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

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  color: var(--primary-color);
}

.navbar-brand-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 20px;
}

.navbar-menu {
  display: flex;
  align-items: center;
  gap: 32px;
}

.navbar-item {
  position: relative;
  padding: 8px 0;
  font-size: 15px;
  color: var(--text-secondary);
  font-weight: 500;
}

.navbar-item::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary-color);
  transition: var(--transition);
}

.navbar-item:hover,
.navbar-item.active {
  color: var(--primary-color);
}

.navbar-item:hover::after,
.navbar-item.active::after {
  width: 100%;
}

/* 底部版权栏 */
.footer {
  background: var(--text-primary);
  color: var(--bg-white);
  padding: 24px 0;
  text-align: center;
  font-size: 14px;
}

.footer a {
  color: var(--primary-light);
}

.footer a:hover {
  text-decoration: underline;
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 500;
  transition: var(--transition);
  cursor: pointer;
  border: none;
  gap: 8px;
}

.btn-primary {
  background: var(--primary-color);
  color: var(--bg-white);
}

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

.btn-accent {
  background: var(--accent-color);
  color: var(--bg-white);
}

.btn-accent:hover {
  background: var(--accent-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

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

.btn-outline:hover {
  background: var(--primary-color);
  color: var(--bg-white);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 13px;
}

.btn-lg {
  padding: 16px 32px;
  font-size: 17px;
}

/* 卡片 */
.card {
  background: var(--bg-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  transition: var(--transition);
  overflow: hidden;
}

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

.card-image {
  width: 100%;
  height: 180px;
  object-fit: cover;
  background: var(--bg-color);
}

.card-content {
  padding: 20px;
}

.card-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.card-meta {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 14px;
  color: var(--text-secondary);
}

.card-meta-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

/* 标签 */
.tag {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 500;
}

.tag-primary {
  background: rgba(74, 144, 226, 0.1);
  color: var(--primary-color);
}

.tag-secondary {
  background: rgba(92, 184, 92, 0.1);
  color: var(--secondary-color);
}

.tag-accent {
  background: rgba(245, 166, 35, 0.1);
  color: var(--accent-color);
}

/* 标题 */
.section-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 24px;
  position: relative;
  padding-left: 16px;
}

.section-title::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 24px;
  background: var(--primary-color);
  border-radius: 2px;
}

/* 搜索框 */
.search-box {
  display: flex;
  width: 100%;
  max-width: 600px;
  margin: 0 auto;
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-light);
  overflow: hidden;
}

.search-input {
  flex: 1;
  padding: 16px 20px;
  border: none;
  outline: none;
  font-size: 15px;
}

.search-input::placeholder {
  color: var(--text-muted);
}

.search-btn {
  padding: 16px 28px;
  background: var(--primary-color);
  color: var(--bg-white);
  font-size: 15px;
  font-weight: 500;
  border: none;
  cursor: pointer;
  transition: var(--transition);
}

.search-btn:hover {
  background: var(--primary-dark);
}

/* ===== 3. 首页样式 ===== */

/* 轮播图区域 */
.carousel-section {
  background: linear-gradient(135deg, #FEF9E7 0%, #FDF2E9 50%, #F5EEF8 100%);
  padding: 40px 0 60px;
  overflow: hidden;
}

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

.carousel-title {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 24px;
  text-align: center;
  font-family: 'Noto Sans SC', sans-serif;
}

.carousel-wrapper {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
}

.carousel-track {
  position: relative;
  height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.carousel-item {
  position: absolute;
  width: 280px;
  height: 380px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 8px 32px rgba(0,0,0,0.15);
  transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  opacity: 0;
  transform: scale(0.8) translateX(0);
  z-index: 1;
}

.carousel-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.carousel-item.active {
  opacity: 1;
  transform: scale(1) translateX(0);
  z-index: 10;
}

.carousel-item.prev {
  opacity: 0.6;
  transform: scale(0.85) translateX(-320px);
  z-index: 5;
}

.carousel-item.next {
  opacity: 0.6;
  transform: scale(0.85) translateX(320px);
  z-index: 5;
}

.carousel-content {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 20px;
  background: linear-gradient(transparent, rgba(0,0,0,0.8));
  color: white;
}

.carousel-tag {
  display: inline-block;
  padding: 4px 12px;
  background: var(--primary-color);
  border-radius: 20px;
  font-size: 12px;
  font-weight: 500;
  margin-bottom: 8px;
}

.carousel-tag.tag-secondary {
  background: var(--secondary-color);
}

.carousel-tag.tag-accent {
  background: var(--accent-color);
}

.carousel-item-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 4px;
}

.carousel-item-desc {
  font-size: 13px;
  opacity: 0.9;
}

.carousel-indicators {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-top: 24px;
}

.indicator {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--border-color);
  cursor: pointer;
  transition: var(--transition);
}

.indicator.active {
  background: var(--primary-color);
  width: 28px;
  border-radius: 5px;
}

.indicator:hover {
  background: var(--primary-light);
}

/* 搜索区域 */
.search-banner {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 50%, #A8D5E2 100%);
  padding: 60px 0;
  text-align: center;
  color: var(--bg-white);
}

.search-banner-title {
  font-size: 36px;
  font-weight: 700;
  margin-bottom: 12px;
  text-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.search-banner-subtitle {
  font-size: 18px;
  opacity: 0.95;
  margin-bottom: 32px;
}

.search-section {
  margin-bottom: 0;
}

/* 快捷入口 */
.quick-access {
  padding: 60px 0;
  background: var(--bg-white);
}

.quick-access-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.quick-access-item {
  text-align: center;
  padding: 32px 20px;
  background: var(--bg-color);
  border-radius: var(--radius-md);
  transition: var(--transition);
  cursor: pointer;
}

.quick-access-item:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  background: var(--bg-white);
}

.quick-access-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 16px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
}

.quick-access-icon.competition {
  background: linear-gradient(135deg, #4A90E2, #87CEEB);
  color: white;
}

.quick-access-icon.volunteer {
  background: linear-gradient(135deg, #5CB85C, #7DCB7D);
  color: white;
}

.quick-access-icon.lecture {
  background: linear-gradient(135deg, #9B59B6, #BB8FCE);
  color: white;
}

.quick-access-icon.culture {
  background: linear-gradient(135deg, #E74C3C, #F1948A);
  color: white;
}

.quick-access-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.quick-access-desc {
  font-size: 14px;
  color: var(--text-secondary);
}

/* 热门活动 */
.hot-activities {
  padding: 60px 0;
}

.hot-activities-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.activity-card {
  display: flex;
  flex-direction: column;
}

.activity-card .card-image {
  height: 200px;
}

.activity-tag {
  margin-bottom: 12px;
}

.activity-title {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text-primary);
  line-height: 1.4;
}

.activity-meta {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 13px;
  color: var(--text-secondary);
}

.activity-meta-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

/* ===== 4. 分类页样式 ===== */

.classify-page {
  padding: 40px 0;
}

.classify-layout {
  display: grid;
  grid-template-columns: 250px 1fr;
  gap: 32px;
}

.sidebar {
  background: var(--bg-white);
  border-radius: var(--radius-md);
  padding: 24px;
  height: fit-content;
  position: sticky;
  top: calc(var(--nav-height) + 24px);
  box-shadow: var(--shadow-card);
}

.sidebar-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 20px;
  color: var(--text-primary);
  padding-bottom: 12px;
  border-bottom: 2px solid var(--border-color);
}

.sidebar-menu {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.sidebar-item {
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  color: var(--text-secondary);
  transition: var(--transition);
  cursor: pointer;
}

.sidebar-item:hover {
  background: var(--bg-color);
  color: var(--primary-color);
}

.sidebar-item.active {
  background: rgba(74, 144, 226, 0.1);
  color: var(--primary-color);
  font-weight: 500;
}

.main-content {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.content-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 24px;
  background: var(--bg-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
}

.content-title {
  font-size: 20px;
  font-weight: 600;
  color: var(--text-primary);
}

.content-count {
  font-size: 14px;
  color: var(--text-muted);
  margin-left: 8px;
}

.sort-options {
  display: flex;
  gap: 16px;
}

.sort-item {
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--text-secondary);
  background: var(--bg-color);
  cursor: pointer;
  transition: var(--transition);
}

.sort-item:hover,
.sort-item.active {
  background: var(--primary-color);
  color: var(--bg-white);
}

.activity-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  padding: 32px 0;
}

.pagination-item {
  min-width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--text-secondary);
  background: var(--bg-white);
  cursor: pointer;
  transition: var(--transition);
}

.pagination-item:hover,
.pagination-item.active {
  background: var(--primary-color);
  color: var(--bg-white);
}

.pagination-item.disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.pagination-ellipsis {
  color: var(--text-muted);
}

/* ===== 5. 详情页样式 ===== */

.detail-page {
  padding: 40px 0;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.breadcrumb a {
  color: var(--primary-color);
}

.breadcrumb a:hover {
  text-decoration: underline;
}

.breadcrumb-separator {
  color: var(--text-muted);
}

.detail-header {
  margin-bottom: 32px;
}

.detail-cover {
  width: 100%;
  height: 400px;
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: 24px;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 48px;
}

.detail-title {
  font-size: 32px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.detail-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 32px;
}

.detail-main {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.detail-card {
  background: var(--bg-white);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-card);
}

.detail-card-title {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 20px;
  color: var(--text-primary);
  padding-bottom: 12px;
  border-bottom: 2px solid var(--border-color);
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.info-item {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.info-label {
  font-size: 14px;
  color: var(--text-muted);
}

.info-value {
  font-size: 15px;
  color: var(--text-primary);
  font-weight: 500;
}

.info-description {
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-secondary);
}

.detail-sidebar {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.sidebar-card {
  background: var(--bg-white);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-card);
}

.sidebar-card-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.register-btn {
  width: 100%;
  padding: 16px;
  font-size: 18px;
  font-weight: 600;
  background: var(--accent-color);
  color: var(--bg-white);
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
}

.register-btn:hover {
  background: var(--accent-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

.qr-placeholder {
  width: 100%;
  height: 200px;
  background: var(--bg-color);
  border-radius: var(--radius-sm);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 14px;
  gap: 12px;
}

.qr-icon {
  font-size: 48px;
  opacity: 0.5;
}

.contact-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--text-secondary);
}

.contact-icon {
  width: 32px;
  height: 32px;
  background: var(--bg-color);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-color);
}

.tips-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.tip-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.tip-icon {
  color: var(--accent-color);
  flex-shrink: 0;
}

/* ===== 6. 个人中心样式 ===== */

.user-page {
  padding: 40px 0;
}

.user-header {
  background: var(--bg-white);
  border-radius: var(--radius-md);
  padding: 40px;
  margin-bottom: 32px;
  box-shadow: var(--shadow-card);
  display: flex;
  align-items: center;
  gap: 32px;
}

.user-avatar {
  width: 120px;
  height: 120px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 48px;
  flex-shrink: 0;
}

.user-info {
  flex: 1;
}

.user-name {
  font-size: 26px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.user-id {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.user-bio {
  font-size: 15px;
  color: var(--text-secondary);
}

.user-menu {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 32px;
}

.menu-card {
  background: var(--bg-white);
  border-radius: var(--radius-md);
  padding: 24px;
  text-align: center;
  box-shadow: var(--shadow-card);
  transition: var(--transition);
  cursor: pointer;
  position: relative;
  user-select: none;
  border: 2px solid transparent;
}

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

.menu-card:active {
  transform: translateY(-2px) scale(0.98);
}

/* 选中状态 - 天青色主题 */
.menu-card.active {
  background: var(--primary-color);
  border-color: var(--primary-dark);
  box-shadow: 0 4px 16px rgba(123, 161, 169, 0.4);
}

.menu-card.active .menu-title,
.menu-card.active .menu-desc {
  color: white;
}

.menu-card.active .menu-icon {
  background: rgba(255, 255, 255, 0.2) !important;
  color: white !important;
}

.menu-card.active .menu-badge {
  background: white;
  color: var(--primary-color);
}

.menu-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
}

.menu-icon.blue {
  background: rgba(74, 144, 226, 0.1);
  color: var(--primary-color);
}

.menu-icon.green {
  background: rgba(92, 184, 92, 0.1);
  color: var(--secondary-color);
}

.menu-icon.orange {
  background: rgba(245, 166, 35, 0.1);
  color: var(--accent-color);
}

.menu-icon.purple {
  background: rgba(139, 115, 85, 0.1);
  color: #8B7355;
}

.menu-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.menu-desc {
  font-size: 13px;
  color: var(--text-muted);
}

.menu-badge {
  position: absolute;
  top: 16px;
  right: 16px;
  min-width: 22px;
  height: 22px;
  background: var(--accent-color);
  color: white;
  border-radius: 11px;
  font-size: 12px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 6px;
}

.enrolled-section {
  background: var(--bg-white);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-card);
}

.enrolled-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.enrolled-item {
  display: flex;
  align-items: center;
  padding: 20px;
  background: var(--bg-color);
  border-radius: var(--radius-sm);
  gap: 20px;
  transition: var(--transition);
}

.enrolled-item:hover {
  background: var(--bg-white);
  box-shadow: var(--shadow-light);
}

.enrolled-icon {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 24px;
  flex-shrink: 0;
}

.enrolled-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.enrolled-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
}

.enrolled-meta {
  font-size: 13px;
  color: var(--text-secondary);
  display: flex;
  gap: 16px;
}

.enrolled-status {
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 500;
}

.status-approved {
  background: rgba(92, 184, 92, 0.1);
  color: var(--secondary-color);
}

.status-pending {
  background: rgba(245, 166, 35, 0.1);
  color: var(--accent-color);
}

.status-cancelled {
  background: rgba(153, 153, 153, 0.1);
  color: var(--text-muted);
}

.enrolled-actions {
  display: flex;
  gap: 10px;
}

/* ===== 收藏功能样式 ===== */

/* 收藏按钮基础样式 */
.favorite-btn {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.95);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  transition: all 0.3s ease;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
  z-index: 10;
}

.favorite-btn:hover {
  transform: scale(1.1);
  background: white;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.favorite-btn .heart-icon {
  transition: all 0.3s ease;
}

/* 未收藏状态 */
.favorite-btn:not(.favorited) .heart-icon {
  color: #ccc;
}

.favorite-btn:not(.favorited):hover .heart-icon {
  color: #ff6b6b;
}

/* 已收藏状态 */
.favorite-btn.favorited {
  background: white;
}

.favorite-btn.favorited .heart-icon {
  color: #ff6b6b;
}

.favorite-btn.favorited:hover .heart-icon {
  animation: heartbeat 0.6s ease-in-out;
}

@keyframes heartbeat {
  0%, 100% { transform: scale(1); }
  25% { transform: scale(1.2); }
  50% { transform: scale(1); }
  75% { transform: scale(1.2); }
}

/* 活动卡片添加相对定位，用于收藏按钮绝对定位 */
.activity-card,
.search-result-card {
  position: relative;
}

/* 详情页收藏按钮样式 */
.detail-favorite-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  background: white;
  border: 2px solid #e0e0e0;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.3s ease;
}

.detail-favorite-btn:hover {
  border-color: #ff6b6b;
  color: #ff6b6b;
}

.detail-favorite-btn.favorited {
  background: #ff6b6b;
  border-color: #ff6b6b;
  color: white;
}

.detail-favorite-btn.favorited:hover {
  background: #ff5252;
  border-color: #ff5252;
}

.detail-favorite-btn .heart-icon {
  font-size: 18px;
}

/* 收藏提示消息 */
.favorite-toast {
  position: fixed;
  bottom: 100px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: rgba(0, 0, 0, 0.8);
  color: white;
  padding: 12px 24px;
  border-radius: 25px;
  font-size: 14px;
  z-index: 9999;
  opacity: 0;
  transition: all 0.3s ease;
  pointer-events: none;
}

.favorite-toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

/* 我的收藏页面样式 */
.favorites-section {
  background: var(--bg-white);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-card);
  margin-top: 32px;
}

.favorites-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.favorites-empty {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted);
}

.favorites-empty-icon {
  font-size: 64px;
  margin-bottom: 20px;
  opacity: 0.5;
}

.favorites-empty-title {
  font-size: 20px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.favorites-empty-desc {
  font-size: 14px;
  margin-bottom: 20px;
}

/* 响应式适配 */
@media (max-width: 1200px) {
  .favorites-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .favorites-grid {
    grid-template-columns: 1fr;
  }
  
  .favorite-btn {
    width: 36px;
    height: 36px;
    font-size: 18px;
  }
}

/* ===== 7. 响应式适配 ===== */

@media (max-width: 1200px) {
  .container {
    padding: 0 20px;
  }

  .quick-access-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .hot-activities-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .classify-layout {
    grid-template-columns: 220px 1fr;
  }

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

  .user-menu {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 992px) {
  .navbar-menu {
    gap: 24px;
  }

  .quick-access-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .hot-activities-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .classify-layout {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
  }

  .activity-list {
    grid-template-columns: 1fr;
  }

  .detail-layout {
    grid-template-columns: 1fr;
  }

  .detail-sidebar {
    flex-direction: row;
    flex-wrap: wrap;
  }

  .sidebar-card {
    flex: 1;
    min-width: 250px;
  }

  .user-menu {
    grid-template-columns: repeat(2, 1fr);
  }

  .user-header {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 768px) {
  :root {
    --nav-height: 56px;
  }

  .hero-title {
    font-size: 32px;
  }

  .hero-subtitle {
    font-size: 18px;
  }

  .quick-access-grid {
    grid-template-columns: 1fr;
  }

  .hot-activities-grid {
    grid-template-columns: 1fr;
  }

  .info-grid {
    grid-template-columns: 1fr;
  }

  .user-menu {
    grid-template-columns: 1fr;
  }

  .enrolled-item {
    flex-direction: column;
    align-items: flex-start;
  }

  .enrolled-actions {
    width: 100%;
    margin-top: 12px;
  }

  .content-header {
    flex-direction: column;
    gap: 16px;
    align-items: flex-start;
  }
}