/*
 * Friday Theme - Main Stylesheet
 * MacCMS v10 Compatible
 * Mobile-First Responsive Design
 */

/* ===========================
   1. CSS变量定义
   =========================== */
:root {
  /* 主题色彩 */
  --primary-color: #007bff;
  --primary-hover: #0056b3;
  --secondary-color: #6c757d;
  --success-color: #28a745;
  --warning-color: #ffc107;
  --danger-color: #dc3545;
  --info-color: #17a2b8;

  /* 背景色 */
  --bg-dark: #1a1d29;
  --bg-card: #252833;
  --bg-light: #2d3142;
  --bg-overlay: rgba(0, 0, 0, 0.7);

  /* 文字色彩 */
  --text-light: #ffffff;
  --text-muted: #8a92a5;
  --text-secondary: #6c757d;

  /* 边框相关 */
  --border-color: #3a3f51;
  --border-light: #495057;
  --border-radius: 8px;
  --border-radius-lg: 12px;
  --border-radius-sm: 4px;

  /* 间距 */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-xxl: 3rem;

  /* 动画 */
  --transition: all 0.3s ease;
  --transition-fast: all 0.15s ease;
  --transition-slow: all 0.5s ease;

  /* 阴影 */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.12);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.15);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.25);

  /* 字体 */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-md: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-xxl: 1.5rem;

  /* 布局 */
  --container-max-width: 1200px;
  --header-height: 60px;
  --footer-height: auto;
}

/* ===========================
   2. 重置样式
   =========================== */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-md);
  line-height: 1.6;
  color: var(--text-light);
  background: var(--bg-dark);
  overflow-x: hidden;
  min-height: 100vh;
}

/* 重置列表样式 */
ul, ol {
  list-style: none;
}

/* 重置链接样式 */
a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition-fast);
}

a:hover {
  color: var(--primary-color);
}

/* 重置表单元素 */
input, textarea, select, button {
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

/* 重置图片 */
img {
  max-width: 100%;
  height: auto;
  vertical-align: middle;
}

/* 重置表格 */
table {
  border-collapse: collapse;
  border-spacing: 0;
}

/* ===========================
   3. 布局样式
   =========================== */

/* 容器 */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* 网格系统 */
.row {
  display: flex;
  flex-wrap: wrap;
  margin: 0 -var(--spacing-sm);
}

.col {
  flex: 1;
  padding: 0 var(--spacing-sm);
}

/* 栅格列 */
.col-12 { flex: 0 0 100%; }
.col-11 { flex: 0 0 91.666667%; }
.col-10 { flex: 0 0 83.333333%; }
.col-9 { flex: 0 0 75%; }
.col-8 { flex: 0 0 66.666667%; }
.col-7 { flex: 0 0 58.333333%; }
.col-6 { flex: 0 0 50%; }
.col-5 { flex: 0 0 41.666667%; }
.col-4 { flex: 0 0 33.333333%; }
.col-3 { flex: 0 0 25%; }
.col-2 { flex: 0 0 16.666667%; }
.col-1 { flex: 0 0 8.333333%; }

/* Flexbox 工具类 */
.d-flex { display: flex; }
.d-inline-flex { display: inline-flex; }
.d-block { display: block; }
.d-inline-block { display: inline-block; }
.d-none { display: none; }

.flex-row { flex-direction: row; }
.flex-column { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.flex-nowrap { flex-wrap: nowrap; }

.justify-content-start { justify-content: flex-start; }
.justify-content-center { justify-content: center; }
.justify-content-end { justify-content: flex-end; }
.justify-content-between { justify-content: space-between; }
.justify-content-around { justify-content: space-around; }

.align-items-start { align-items: flex-start; }
.align-items-center { align-items: center; }
.align-items-end { align-items: flex-end; }
.align-items-stretch { align-items: stretch; }

/* ===========================
   4. 组件样式
   =========================== */

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

.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.card-body {
  padding: var(--spacing-lg);
}

.card-header {
  padding: var(--spacing-md) var(--spacing-lg);
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-light);
}

.card-footer {
  padding: var(--spacing-md) var(--spacing-lg);
  border-top: 1px solid var(--border-color);
  background: var(--bg-light);
}

/* 按钮组件 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--border-radius);
  font-size: var(--font-size-sm);
  font-weight: 500;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
  transition: var(--transition-fast);
  min-height: 44px; /* 触摸友好 */
  user-select: none;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
}

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

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

.btn--secondary {
  background: var(--secondary-color);
  color: white;
  border-color: var(--secondary-color);
}

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

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

.btn--lg {
  padding: var(--spacing-md) var(--spacing-lg);
  font-size: var(--font-size-md);
}

.btn--sm {
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: var(--font-size-xs);
  min-height: 32px;
}

.btn--full {
  width: 100%;
}

.btn--icon {
  width: 44px;
  height: 44px;
  padding: 0;
  border-radius: 50%;
}

/* 输入框组件 */
.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-label {
  display: block;
  margin-bottom: var(--spacing-sm);
  font-weight: 500;
  color: var(--text-light);
  font-size: var(--font-size-sm);
}

.form-input {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  background: var(--bg-dark);
  color: var(--text-light);
  font-size: var(--font-size-md);
  transition: var(--transition-fast);
  min-height: 44px;
}

.form-input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.1);
}

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

/* ===========================
   Authentication Layout
   =========================== */
.auth-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: linear-gradient(135deg, #1a1d29 0%, #252833 100%);
}

.auth-card {
  width: 100%;
  max-width: 420px;
  padding: 40px;
  border-radius: var(--border-radius-lg);
  background: var(--bg-card);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
}

.auth-header {
  text-align: center;
  margin-bottom: 30px;
}

.auth-title {
  font-size: 28px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-light);
}

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

.password-input {
  position: relative;
}

.password-toggle {
  position: absolute;
  top: 50%;
  right: 12px;
  transform: translateY(-50%);
  padding: 4px;
  border: none;
  background: none;
  color: var(--text-muted);
  cursor: pointer;
}

.verify-input {
  display: flex;
  align-items: center;
  gap: 10px;
}

.verify-img {
  height: 44px;
  border-radius: 4px;
  cursor: pointer;
}

.btn-loading {
  display: none;
}

.loading-spinner {
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top: 2px solid var(--primary-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  cursor: pointer;
}

.checkbox-input {
  margin: 0;
}

.form-options {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-lg);
}

.link {
  font-size: 14px;
  color: var(--primary-color);
  text-decoration: none;
  transition: var(--transition-fast);
}

.link:hover {
  text-decoration: underline;
}

.auth-divider {
  position: relative;
  margin: 20px 0;
  text-align: center;
  color: var(--text-muted);
  font-size: 14px;
}

.auth-divider::before {
  content: '';
  position: absolute;
  inset: 50% 0 auto;
  height: 1px;
  background: var(--border-color);
}

.auth-divider span {
  position: relative;
  padding: 0 15px;
  background: var(--bg-card);
}

.social-login {
  display: flex;
  gap: 10px;
}

.social-btn {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px;
  border-radius: var(--border-radius);
  border: 1px solid var(--border-color);
  background: transparent;
  color: var(--text-light);
  text-decoration: none;
  font-size: 14px;
  transition: var(--transition-fast);
}

.social-btn:hover {
  background: var(--bg-dark);
  border-color: var(--primary-color);
}

.auth-footer {
  margin-top: 20px;
  text-align: center;
  font-size: 14px;
  color: var(--text-muted);
}

.link--primary {
  color: var(--primary-color);
  font-weight: 500;
}

/* ===========================
   RESPONSIVE DESIGN SYSTEM
   =========================== */

/* 断点系统
   - mobile: 320px - 768px  (手机)
   - tablet: 768px - 1024px (平板)
   - desktop: 1024px+       (桌面)
*/

/* 移动端优先 (Mobile First) */
@media (max-width: 767px) {
  /* === 容器响应式 === */
  .container {
    padding: 0 16px;
    max-width: 100%;
  }

  /* === 头部响应式 === */
  .header__inner {
    padding: 12px 0;
  }

  .header__logo .logo__text {
    font-size: 18px;
  }

  .header__logo .logo__img {
    max-height: 32px;
  }

  /* 强制隐藏桌面导航 */
  .header .nav,
  .nav {
    display: none !important;
    visibility: hidden !important;
    opacity: 0 !important;
    pointer-events: none !important;
  }

  /* 显示移动端切换按钮 */
  .header .mobile-toggle,
  .mobile-toggle {
    display: flex !important;
    visibility: visible !important;
    opacity: 1 !important;
  }

  /* === 认证页面响应式 === */
  .auth-card {
    padding: 24px 20px;
    margin: 20px 0;
  }

  .auth-title {
    font-size: 22px;
    margin-bottom: 20px;
  }

  .auth-form .form-group {
    margin-bottom: 16px;
  }

  .auth-form input {
    padding: 12px 16px;
    font-size: 16px; /* 防止iOS缩放 */
  }

  .auth-form .btn {
    padding: 14px 24px;
    font-size: 16px;
    width: 100%;
  }

  /* === 主内容响应式 === */
  .main-content {
    min-height: calc(100vh - 60px);
  }

  /* === 欢迎页面响应式 === */
  .welcome-section {
    padding: 2rem 0;
    min-height: calc(100vh - 60px);
  }

  .welcome-title {
    font-size: 28px;
    margin-bottom: 16px;
  }

  .welcome-description {
    font-size: 16px;
    line-height: 1.5;
    margin-bottom: 24px;
  }

  .welcome-actions {
    flex-direction: column;
    gap: 12px;
    align-items: stretch;
  }

  .welcome-btn {
    padding: 16px 20px;
    justify-content: center;
    text-align: center;
  }

  /* === 视频列表响应式 === */
  .filter-section {
    padding: 16px 0;
  }

  .filter-group {
    margin-bottom: 16px;
  }

  .filter-options {
    flex-wrap: wrap;
    gap: 8px;
  }

  .filter-option {
    padding: 8px 12px;
    font-size: 14px;
  }

  .type-title {
    font-size: 24px;
    margin-bottom: 20px;
  }

  /* === 视频卡片响应式 === */
  .vod-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  .vod-card {
    border-radius: 8px;
  }

  .vod-card__poster {
    aspect-ratio: 3/4;
  }

  .vod-card__title {
    font-size: 14px;
    line-height: 1.3;
    padding: 8px;
  }

  .vod-card__meta {
    font-size: 12px;
    padding: 0 8px 8px;
  }

  /* === 播放器响应式 === */
  .player-container {
    margin-bottom: 16px;
  }

  .player-wrapper {
    border-radius: 8px;
    overflow: hidden;
  }

  .player-controls {
    padding: 16px;
  }

  .player-title {
    font-size: 20px;
    margin-bottom: 12px;
  }

  .player-meta {
    font-size: 14px;
    flex-wrap: wrap;
    gap: 8px;
  }

  /* === 用户菜单响应式 === */
  .user-menu__dropdown {
    right: 0;
    left: auto;
    min-width: 200px;
  }

  /* === 分页响应式 === */
  .pagination {
    justify-content: center;
    flex-wrap: wrap;
    gap: 4px;
  }

  .pagination .page-link {
    padding: 8px 12px;
    font-size: 14px;
  }
}

/* 平板设备 (768px - 1024px) */
@media (min-width: 768px) and (max-width: 1023px) {
  .container {
    padding: 0 24px;
    max-width: 100%;
  }

  /* 在平板上仍然使用移动端导航 */
  .header .nav,
  .nav {
    display: none !important;
    visibility: hidden !important;
    opacity: 0 !important;
    pointer-events: none !important;
  }

  .header .mobile-toggle,
  .mobile-toggle {
    display: flex !important;
    visibility: visible !important;
    opacity: 1 !important;
  }

  /* 调整视频网格为3列 */
  .vod-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }

  /* 欢迎页面优化 */
  .welcome-title {
    font-size: 36px;
  }

  .welcome-actions {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  /* 播放器容器优化 */
  .player-container {
    max-width: none;
  }

  /* 筛选器优化 */
  .filter-section {
    padding: 20px 0;
  }
}

/* 桌面设备 (1024px+) */
@media (min-width: 1024px) {
  /* 隐藏移动端按钮 */
  .header .mobile-toggle,
  .mobile-toggle {
    display: none !important;
    visibility: hidden !important;
    opacity: 0 !important;
  }

  /* 显示桌面导航 */
  .header .nav,
  .nav {
    display: flex !important;
    visibility: visible !important;
    opacity: 1 !important;
    pointer-events: auto !important;
  }

  /* 视频网格恢复多列 */
  .vod-grid {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 20px;
  }

  /* 大屏幕下的最大宽度限制 */
  .welcome-hero {
    max-width: 800px;
    margin: 0 auto;
  }
}

/* 超大屏幕优化 (1400px+) */
@media (min-width: 1400px) {
  .container {
    max-width: 1320px;
  }

  .vod-grid {
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  }
}

/* ===========================
   Header & Navigation
   =========================== */
.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition);
}

body.menu-open {
  overflow: hidden;
}

.header--scrolled {
  box-shadow: var(--shadow-sm);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  gap: 2rem;
}

.header__logo {
  flex-shrink: 0;
}

.logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  color: var(--text-light);
}

.logo__img {
  height: 40px;
  width: auto;
}

.logo__text {
  font-size: 1.5rem;
  font-weight: 700;
  white-space: nowrap;
}

/* 头部导航基础样式 */
.header .nav {
  flex: 1;
  display: flex;
  justify-content: center;
}

.nav__list {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav__item {
  position: relative;
}

.nav__link {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
  border-radius: var(--border-radius);
  white-space: nowrap;
  transition: var(--transition-fast);
}

.nav__link:hover {
  color: var(--text-light);
  background: var(--bg-dark);
}

.nav__link--active {
  color: var(--primary-color);
  background: rgba(0, 123, 255, 0.1);
}

.header__actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}

.action-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.5rem;
  border-radius: var(--border-radius);
  border: 1px solid var(--border-color);
  background: transparent;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.875rem;
  cursor: pointer;
  transition: var(--transition-fast);
}

.action-btn:hover {
  color: var(--text-light);
  border-color: var(--primary-color);
  background: rgba(0, 123, 255, 0.05);
}

.action-btn--login {
  padding: 0.5rem 1rem;
}

.user-menu {
  position: relative;
}

.user-menu__trigger {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  border-radius: var(--border-radius);
  border: 1px solid var(--border-color);
  background: transparent;
  color: var(--text-light);
  cursor: pointer;
  transition: var(--transition-fast);
}

.user-menu__trigger:hover {
  border-color: var(--primary-color);
  background: rgba(0, 123, 255, 0.05);
}

.user-menu__dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 180px;
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: var(--transition-fast);
  z-index: 1000;
}

.user-menu__dropdown--active {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.user-menu__link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  font-size: 0.875rem;
  color: var(--text-muted);
  text-decoration: none;
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition-fast);
}

.user-menu__link:last-child {
  border-bottom: none;
}

.user-menu__link:hover {
  color: var(--text-light);
  background: var(--bg-dark);
}

.user-menu__link--logout {
  color: #ef4444;
}

.user-menu__link--logout:hover {
  background: rgba(239, 68, 68, 0.1);
}

/* ===========================
   Global Search
   =========================== */
.search-bar {
  display: none;
  opacity: 0;
  transform: translateY(-10px);
  background: var(--bg-dark);
  border-top: 1px solid var(--border-color);
  padding: var(--spacing-lg) 0;
  transition: var(--transition);
}

.search-bar--active {
  display: block;
  opacity: 1;
  transform: translateY(0);
}

.search-form {
  max-width: 600px;
  margin: 0 auto;
}

.search-input-wrapper {
  position: relative;
  display: flex;
}

.search-input {
  flex: 1;
  padding: 0.75rem 1rem;
  font-size: 0.875rem;
  color: var(--text-light);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-right: none;
  border-radius: 8px 0 0 8px;
  outline: none;
}

.search-input:focus {
  border-color: var(--primary-color);
}

.search-submit {
  padding: 0.75rem 1rem;
  border-radius: 0 8px 8px 0;
  border: 1px solid var(--primary-color);
  background: var(--primary-color);
  color: #fff;
  cursor: pointer;
  transition: var(--transition-fast);
}

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

.hot-search {
  margin-top: 1rem;
  text-align: center;
}

.hot-search__label {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-right: 0.5rem;
}

.hot-search__tags {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.hot-search__tag {
  padding: 0.25rem 0.75rem;
  border-radius: 16px;
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  color: var(--text-muted);
  font-size: 0.75rem;
  text-decoration: none;
  transition: var(--transition-fast);
}

.hot-search__tag:hover {
  color: var(--primary-color);
  border-color: var(--primary-color);
}

/* ===========================
   MODERN MOBILE NAVIGATION
   =========================== */

/* 汉堡菜单按钮 - 现代化设计 */
.mobile-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  border: none;
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.mobile-toggle::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.1), rgba(255,255,255,0.05));
  border-radius: inherit;
  transition: opacity 0.3s ease;
  opacity: 0;
}

.mobile-toggle:hover {
  background: rgba(255, 255, 255, 0.15);
  transform: translateY(-1px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.mobile-toggle:hover::before {
  opacity: 1;
}

.mobile-toggle:active {
  transform: translateY(0);
  transition: transform 0.1s ease;
}

.mobile-toggle__line {
  width: 20px;
  height: 2px;
  background: var(--text-light);
  border-radius: 1px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  transform-origin: center;
}

.mobile-toggle__line:nth-child(1) {
  transform: translateY(-2px);
}

.mobile-toggle__line:nth-child(3) {
  transform: translateY(2px);
}

/* 汉堡菜单动画效果 */
.mobile-sidebar--active .mobile-toggle__line:nth-child(1) {
  transform: rotate(45deg) translateY(0);
}

.mobile-sidebar--active .mobile-toggle__line:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.mobile-sidebar--active .mobile-toggle__line:nth-child(3) {
  transform: rotate(-45deg) translateY(0);
}

/* 侧边栏 - 高端设计 */
.mobile-sidebar {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: 320px;
  max-width: 85vw;
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  border-left: 1px solid rgba(255, 255, 255, 0.1);
  transform: translateX(100%);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 2000;
  box-shadow: -10px 0 50px rgba(0, 0, 0, 0.3);
}

.mobile-sidebar--active {
  transform: translateX(0);
}

/* 遮罩层 - 渐进式模糊 */
.mobile-sidebar__overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  opacity: 0;
  visibility: hidden;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  pointer-events: none;
}

.mobile-sidebar--active .mobile-sidebar__overlay {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

/* 侧边栏内容 */
.mobile-sidebar__content {
  height: 100%;
  display: flex;
  flex-direction: column;
  position: relative;
}

/* 侧边栏头部 - 玻璃态设计 */
.mobile-sidebar__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 20px;
  background: rgba(255, 255, 255, 0.05);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
}

.mobile-sidebar__title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-light);
  letter-spacing: -0.5px;
}

/* 关闭按钮 - 现代化设计 */
.mobile-sidebar__close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: none;
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-muted);
  border-radius: 12px;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.mobile-sidebar__close::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.1), rgba(255,255,255,0.05));
  border-radius: inherit;
  transition: opacity 0.3s ease;
  opacity: 0;
}

.mobile-sidebar__close:hover {
  color: var(--text-light);
  background: rgba(255, 255, 255, 0.15);
  transform: rotate(90deg);
}

.mobile-sidebar__close:hover::before {
  opacity: 1;
}

/* 导航菜单 - 精致列表设计 */
.mobile-nav {
  flex: 1;
  padding: 16px 0;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.mobile-nav__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.mobile-nav__item {
  margin: 0;
  padding: 0 20px;
}

/* 导航链接 - 高端交互设计 */
.mobile-nav__link {
  display: flex;
  align-items: center;
  padding: 16px 20px;
  margin: 4px 0;
  font-size: 16px;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
  border-radius: 12px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
  letter-spacing: -0.2px;
}

.mobile-nav__link::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--primary-color);
  transform: scaleY(0);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  border-radius: 0 2px 2px 0;
}

.mobile-nav__link::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.1), rgba(255,255,255,0.05));
  border-radius: inherit;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.mobile-nav__link:hover {
  color: var(--text-light);
  background: rgba(255, 255, 255, 0.08);
  transform: translateX(8px);
}

.mobile-nav__link:hover::before {
  transform: scaleY(1);
}

.mobile-nav__link:hover::after {
  opacity: 1;
}

.mobile-nav__link:active {
  transform: translateX(4px);
  transition: transform 0.1s ease;
}

/* 导航分隔线 - 精致设计 */
.mobile-nav__divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.1), transparent);
  margin: 12px 20px;
  position: relative;
}

.mobile-nav__divider::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 4px;
  height: 4px;
  background: rgba(255,255,255,0.2);
  border-radius: 50%;
}

/* ===========================
   MOBILE TOUCH ENHANCEMENTS
   =========================== */

/* 触摸设备优化 */
@media (hover: none) and (pointer: coarse) {
  /* 移动设备上的触摸优化 */
  .mobile-nav__link {
    padding: 18px 20px;
    font-size: 17px;
  }

  .mobile-toggle {
    width: 48px;
    height: 48px;
  }

  .mobile-sidebar__close {
    width: 44px;
    height: 44px;
  }

  /* 去除悬停效果，使用点击反馈 */
  .mobile-nav__link:hover {
    transform: none;
  }

  .mobile-nav__link:active {
    background: rgba(255, 255, 255, 0.12);
    transform: scale(0.98);
  }
}

/* iOS Safari 优化 */
@supports (-webkit-touch-callout: none) {
  .mobile-sidebar {
    -webkit-overflow-scrolling: touch;
  }

  .mobile-nav {
    -webkit-overflow-scrolling: touch;
  }
}

/* 安全区域适配 (iPhone X+ 刘海屏) */
@supports (padding: max(0px)) {
  .mobile-sidebar__header {
    padding-top: max(24px, env(safe-area-inset-top));
  }

  .mobile-nav {
    padding-bottom: max(16px, env(safe-area-inset-bottom));
  }
}

  .action-btn--login {
    padding: 0.5rem;
  }

  .action-btn--login span {
    display: none;
  }
}

@media (max-width: 480px) {
  .header__inner {
    gap: 1rem;
  }

  .logo__text {
    font-size: 1.25rem;
  }

  .user-menu__name {
    display: none;
  }
}

/* ===========================
   Toast Notifications
   =========================== */
.toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 9999;
  max-width: 350px;
  width: calc(100% - 40px);
}

.toast {
  position: relative;
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
  padding: 16px 20px;
  border-radius: var(--border-radius);
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
  transform: translateX(100%);
  opacity: 0;
  transition: all 0.3s ease-in-out;
  overflow: hidden;
}

.toast.show {
  transform: translateX(0);
  opacity: 1;
}

.toast.hide {
  transform: translateX(100%);
  opacity: 0;
}

.toast__icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.toast__message {
  flex: 1;
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.4;
}

.toast__close {
  position: absolute;
  top: 8px;
  right: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border: none;
  border-radius: 4px;
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  opacity: 0.7;
  transition: opacity 0.2s ease;
}

.toast__close:hover {
  opacity: 1;
}

.toast--success {
  border-left: 4px solid #10b981;
}

.toast--success .toast__icon {
  color: #10b981;
}

.toast--error {
  border-left: 4px solid #ef4444;
}

.toast--error .toast__icon {
  color: #ef4444;
}

.toast--warning {
  border-left: 4px solid #f59e0b;
}

.toast--warning .toast__icon {
  color: #f59e0b;
}

.toast--info {
  border-left: 4px solid #3b82f6;
}

.toast--info .toast__icon {
  color: #3b82f6;
}

@media (prefers-color-scheme: dark) {
  .toast {
    background: #374151;
    border-color: #4b5563;
  }

  .toast__message {
    color: #f9fafb;
  }

  .toast__close {
    color: #9ca3af;
  }
}

/* ===========================
   Footer
   =========================== */
.footer {
  margin-top: auto;
  padding: 2rem 0 1rem;
  background: var(--bg-card);
  border-top: 1px solid var(--border-color);
}

.footer-bottom {
  padding-top: 1.5rem;
  text-align: center;
  border-top: 1px solid var(--border-color);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.footer-bottom p {
  margin: 0;
  line-height: 1.4;
}

/* 导航组件 - 继承之前的头部导航样式 */

.nav__list {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

.nav__item {
  position: relative;
}

.nav__link {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  color: var(--text-light);
  text-decoration: none;
  transition: var(--transition-fast);
  border-radius: var(--border-radius);
  min-height: 44px;
}

.nav__link:hover,
.nav__link--active {
  color: var(--primary-color);
  background: rgba(0, 123, 255, 0.1);
}

.nav__icon {
  width: 16px;
  height: 16px;
  fill: currentColor;
}

/* 轮播组件 */
.carousel {
  position: relative;
  overflow: hidden;
  border-radius: var(--border-radius-lg);
}

.carousel__container {
  display: flex;
  transition: transform 0.5s ease;
}

.carousel__slide {
  flex: 0 0 100%;
  position: relative;
}

.carousel__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.carousel__content {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(transparent, rgba(0, 0, 0, 0.8));
  padding: var(--spacing-xl);
  color: white;
}

.carousel__title {
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.carousel__description {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.9);
}

/* 分页组件 */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--spacing-sm);
  margin: var(--spacing-xl) 0;
}

.pagination__item {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--border-radius);
  background: var(--bg-card);
  color: var(--text-light);
  text-decoration: none;
  transition: var(--transition-fast);
  border: 1px solid var(--border-color);
}

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

.pagination__item--active {
  background: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
}

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

.pagination__item--disabled:hover {
  background: var(--bg-card);
  color: var(--text-light);
  border-color: var(--border-color);
}

/* ===========================
   5. 工具类
   =========================== */

/* 间距工具类 */
.m-0 { margin: 0; }
.m-1 { margin: var(--spacing-xs); }
.m-2 { margin: var(--spacing-sm); }
.m-3 { margin: var(--spacing-md); }
.m-4 { margin: var(--spacing-lg); }
.m-5 { margin: var(--spacing-xl); }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }
.mt-5 { margin-top: var(--spacing-xl); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }
.mb-5 { margin-bottom: var(--spacing-xl); }

.ml-0 { margin-left: 0; }
.ml-1 { margin-left: var(--spacing-xs); }
.ml-2 { margin-left: var(--spacing-sm); }
.ml-3 { margin-left: var(--spacing-md); }
.ml-4 { margin-left: var(--spacing-lg); }
.ml-5 { margin-left: var(--spacing-xl); }

.mr-0 { margin-right: 0; }
.mr-1 { margin-right: var(--spacing-xs); }
.mr-2 { margin-right: var(--spacing-sm); }
.mr-3 { margin-right: var(--spacing-md); }
.mr-4 { margin-right: var(--spacing-lg); }
.mr-5 { margin-right: var(--spacing-xl); }

.p-0 { padding: 0; }
.p-1 { padding: var(--spacing-xs); }
.p-2 { padding: var(--spacing-sm); }
.p-3 { padding: var(--spacing-md); }
.p-4 { padding: var(--spacing-lg); }
.p-5 { padding: var(--spacing-xl); }

.pt-0 { padding-top: 0; }
.pt-1 { padding-top: var(--spacing-xs); }
.pt-2 { padding-top: var(--spacing-sm); }
.pt-3 { padding-top: var(--spacing-md); }
.pt-4 { padding-top: var(--spacing-lg); }
.pt-5 { padding-top: var(--spacing-xl); }

.pb-0 { padding-bottom: 0; }
.pb-1 { padding-bottom: var(--spacing-xs); }
.pb-2 { padding-bottom: var(--spacing-sm); }
.pb-3 { padding-bottom: var(--spacing-md); }
.pb-4 { padding-bottom: var(--spacing-lg); }
.pb-5 { padding-bottom: var(--spacing-xl); }

/* 文字工具类 */
.text-left { text-align: left; }
.text-center { text-align: center; }
.text-right { text-align: right; }

.text-primary { color: var(--primary-color); }
.text-secondary { color: var(--text-secondary); }
.text-muted { color: var(--text-muted); }
.text-light { color: var(--text-light); }

.font-weight-normal { font-weight: 400; }
.font-weight-medium { font-weight: 500; }
.font-weight-bold { font-weight: 600; }
.font-weight-bolder { font-weight: 700; }

.font-size-xs { font-size: var(--font-size-xs); }
.font-size-sm { font-size: var(--font-size-sm); }
.font-size-md { font-size: var(--font-size-md); }
.font-size-lg { font-size: var(--font-size-lg); }
.font-size-xl { font-size: var(--font-size-xl); }

/* 位置工具类 */
.position-relative { position: relative; }
.position-absolute { position: absolute; }
.position-fixed { position: fixed; }
.position-sticky { position: sticky; }

/* 其他工具类 */
.w-100 { width: 100%; }
.h-100 { height: 100%; }

.rounded { border-radius: var(--border-radius); }
.rounded-lg { border-radius: var(--border-radius-lg); }
.rounded-sm { border-radius: var(--border-radius-sm); }

.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }

.overflow-hidden { overflow: hidden; }
.overflow-auto { overflow: auto; }

/* ===========================
   6. 动画定义
   =========================== */

/* 淡入动画 */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* 缩放动画 */
@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

/* 旋转动画 */
@keyframes spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

/* 脉冲动画 */
@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

/* 弹跳动画 */
@keyframes bounce {
  0%, 20%, 53%, 80%, 100% {
    transform: translate3d(0, 0, 0);
  }
  40%, 43% {
    transform: translate3d(0, -30px, 0);
  }
  70% {
    transform: translate3d(0, -15px, 0);
  }
  90% {
    transform: translate3d(0, -4px, 0);
  }
}

/* 骨架屏动画 */
@keyframes shimmer {
  0% {
    background-position: -1000px 0;
  }
  100% {
    background-position: 1000px 0;
  }
}

/* 动画类 */
.animate-fadeIn {
  animation: fadeIn 0.5s ease-out;
}

.animate-scaleIn {
  animation: scaleIn 0.3s ease-out;
}

.animate-spin {
  animation: spin 1s linear infinite;
}

.animate-pulse {
  animation: pulse 2s infinite;
}

.animate-bounce {
  animation: bounce 1s infinite;
}

.skeleton {
  background: linear-gradient(90deg, var(--bg-card) 25%, var(--bg-light) 50%, var(--bg-card) 75%);
  background-size: 2000px 100%;
  animation: shimmer 1.5s infinite;
}

/* ===========================
   响应式断点
   =========================== */

/* 平板竖屏 - 576px+ */
@media (min-width: 576px) {
  .container {
    padding: 0 var(--spacing-lg);
  }

  .col-sm-12 { flex: 0 0 100%; }
  .col-sm-11 { flex: 0 0 91.666667%; }
  .col-sm-10 { flex: 0 0 83.333333%; }
  .col-sm-9 { flex: 0 0 75%; }
  .col-sm-8 { flex: 0 0 66.666667%; }
  .col-sm-7 { flex: 0 0 58.333333%; }
  .col-sm-6 { flex: 0 0 50%; }
  .col-sm-5 { flex: 0 0 41.666667%; }
  .col-sm-4 { flex: 0 0 33.333333%; }
  .col-sm-3 { flex: 0 0 25%; }
  .col-sm-2 { flex: 0 0 16.666667%; }
  .col-sm-1 { flex: 0 0 8.333333%; }
}

/* 会员中心 */
.user-center > .container {
  padding: 2rem 0;
}

.user-layout {
  display: flex;
  gap: 2rem;
  align-items: flex-start;
}

.user-sidebar {
  width: 260px;
  background: var(--bg-card);
  border-radius: var(--border-radius-lg);
  padding: 2rem 1.5rem;
  position: sticky;
  top: calc(var(--header-height) + 1rem);
}

.user-profile {
  text-align: center;
  margin-bottom: 2rem;
}

.user-avatar {
  position: relative;
  width: 96px;
  height: 96px;
  margin: 0 auto 1rem;
}

.user-avatar .avatar-img {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid rgba(255, 255, 255, 0.1);
}

.avatar-status {
  position: absolute;
  bottom: 8px;
  right: 6px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 2px solid var(--bg-card);
  background: var(--border-color);
}

.avatar-status.online {
  background: #31c27c;
}

.user-name {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-light);
}

.user-level {
  margin-top: 0.5rem;
  color: var(--text-muted);
}

.level-badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  font-size: 0.75rem;
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-light);
}

.user-nav {
  display: grid;
  gap: 0.5rem;
}

.user-nav .nav-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  border-radius: var(--border-radius);
  color: var(--text-secondary);
  transition: var(--transition-fast);
}

.user-nav .nav-item:hover,
.user-nav .nav-item.active {
  background: rgba(64, 158, 255, 0.12);
  color: var(--text-light);
}

.user-nav .nav-item--danger:hover {
  background: rgba(220, 53, 69, 0.14);
  color: #ff6b81;
}

.user-main {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 2rem;
  background: var(--bg-card);
  border-radius: var(--border-radius-lg);
  padding: 2rem;
  min-height: 480px;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1.5rem;
}

.stat-card {
  display: flex;
  gap: 1rem;
  align-items: center;
  background: var(--bg-card);
  border-radius: var(--border-radius-lg);
  padding: 1.5rem;
}

.stat-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  color: white;
}

.stat-icon--primary { background: #3f8cff; }
.stat-icon--success { background: #31c27c; }
.stat-icon--warning { background: #ffb648; }
.stat-icon--info { background: #6c5ce7; }

.stat-number {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-light);
}

.stat-label {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.quick-actions {
  background: var(--bg-card);
  border-radius: var(--border-radius-lg);
  padding: 1.75rem;
}

.user-center .section-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-light);
  margin-bottom: 1rem;
}

.user-center .action-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.user-center .action-item {
  display: flex;
  gap: 1rem;
  align-items: center;
  padding: 1rem;
  border-radius: var(--border-radius);
  background: rgba(255, 255, 255, 0.04);
  transition: var(--transition-fast);
}

.user-center .action-item:hover {
  transform: translateY(-2px);
  background: rgba(255, 255, 255, 0.08);
}

.user-center .action-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.08);
  display: grid;
  place-items: center;
  color: var(--text-light);
}

.user-center .action-title {
  font-size: 1rem;
  color: var(--text-light);
  font-weight: 600;
}

.user-center .action-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.user-center .recent-section {
  background: var(--bg-card);
  border-radius: var(--border-radius-lg);
  padding: 1.75rem;
}

.user-center .section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.user-center .section-more {
  font-size: 0.85rem;
  color: var(--primary-color);
}

.user-center .section-more:hover {
  color: var(--primary-hover);
}

.user-center .video-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1.5rem;
}

.user-center .video-item {
  background: rgba(255, 255, 255, 0.02);
  border-radius: var(--border-radius);
  overflow: hidden;
  transition: var(--transition-fast);
}

.user-center .video-item:hover {
  transform: translateY(-4px);
}

.user-center .video-thumb {
  position: relative;
  aspect-ratio: 3/4;
  overflow: hidden;
}

.user-center .video-thumb .thumb-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition-fast);
}

.user-center .video-item:hover .thumb-img {
  transform: scale(1.05);
}

.user-center .video-play {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  background: rgba(0, 0, 0, 0.35);
  opacity: 0;
  transition: var(--transition-fast);
  color: white;
}

.user-center .video-item:hover .video-play {
  opacity: 1;
}

.user-center .video-badge {
  position: absolute;
  top: 10px;
  left: 10px;
  background: var(--primary-color);
  color: white;
  font-size: 0.75rem;
  padding: 0.125rem 0.5rem;
  border-radius: var(--border-radius-sm);
}

.user-center .video-info {
  padding: 1rem;
}

.user-center .video-title {
  font-size: 0.95rem;
  color: var(--text-light);
  margin-bottom: 0.35rem;
  line-height: 1.4;
}

.user-center .video-meta {
  display: flex;
  gap: 0.5rem;
  color: var(--text-muted);
  font-size: 0.8rem;
}

.balance-card {
  background: var(--bg-card);
  border-radius: var(--border-radius-lg);
  padding: 2rem;
  display: flex;
  gap: 1.5rem;
  align-items: center;
  border: 1px solid rgba(255, 255, 255, 0.05);
  box-shadow: var(--shadow-sm);
}

.balance-icon {
  width: 72px;
  height: 72px;
  border-radius: 18px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, rgba(64, 158, 255, 0.25), rgba(64, 158, 255, 0.05));
  color: var(--primary-color);
}

.balance-info {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.balance-value {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--text-light);
}

.balance-label {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-light);
}

.balance-tip {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-muted);
  max-width: 420px;
  line-height: 1.6;
}

.user-center .header-left {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.user-center .header-actions {
  display: flex;
  gap: 0.75rem;
  align-items: center;
}

.user-center .header-actions .btn {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.feature-disabled {
  display: flex;
  gap: 2rem;
  align-items: center;
  padding: 2.5rem;
  background: rgba(255, 255, 255, 0.04);
  border-radius: var(--border-radius-lg);
  border: 1px dashed rgba(255, 255, 255, 0.1);
}

.feature-icon {
  width: 72px;
  height: 72px;
  border-radius: 18px;
  display: grid;
  place-items: center;
  background: rgba(64, 158, 255, 0.12);
  color: var(--primary-color);
  flex-shrink: 0;
}

.feature-content {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.feature-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-light);
  margin: 0;
}

.feature-text {
  margin: 0;
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.7;
}

.feature-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.user-center .page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
}

.user-center .page-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-light);
  margin: 0;
}

.user-center .page-subtitle {
  color: var(--text-muted);
  margin: 0.5rem 0 0;
}

.user-center .count-number {
  color: var(--primary-color);
  font-weight: 600;
}

@media (max-width: 1200px) {
  .user-center .stats-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .user-center .video-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 992px) {
  .user-layout {
    flex-direction: column;
  }

  .user-sidebar {
    width: 100%;
    position: static;
    display: flex;
    gap: 2rem;
    align-items: center;
  }

  .user-profile {
    text-align: left;
    margin-bottom: 0;
    flex: 1;
  }

  .user-nav {
    flex: 1;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .user-nav .nav-item {
    justify-content: center;
  }
}

@media (max-width: 768px) {
  .user-center > .container {
    padding: 1.5rem 0;
  }

  .user-center .stats-grid,
  .user-center .action-grid,
  .user-center .video-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .feature-disabled {
    flex-direction: column;
    text-align: center;
  }

  .feature-actions {
    justify-content: center;
  }
}

@media (max-width: 576px) {
  .user-center .stats-grid,
  .user-center .action-grid,
  .user-center .video-grid {
    grid-template-columns: 1fr;
  }

  .user-sidebar {
    flex-direction: column;
    align-items: flex-start;
  }

  .user-nav {
    width: 100%;
    grid-template-columns: 1fr;
  }
}

/* 平板横屏 - 768px+ */
@media (min-width: 768px) {
  :root {
    --header-height: 70px;
  }

  .col-md-12 { flex: 0 0 100%; }
  .col-md-11 { flex: 0 0 91.666667%; }
  .col-md-10 { flex: 0 0 83.333333%; }
  .col-md-9 { flex: 0 0 75%; }
  .col-md-8 { flex: 0 0 66.666667%; }
  .col-md-7 { flex: 0 0 58.333333%; }
  .col-md-6 { flex: 0 0 50%; }
  .col-md-5 { flex: 0 0 41.666667%; }
  .col-md-4 { flex: 0 0 33.333333%; }
  .col-md-3 { flex: 0 0 25%; }
  .col-md-2 { flex: 0 0 16.666667%; }
  .col-md-1 { flex: 0 0 8.333333%; }
}

/* 小屏PC - 992px+ */
@media (min-width: 992px) {
  .col-lg-12 { flex: 0 0 100%; }
  .col-lg-11 { flex: 0 0 91.666667%; }
  .col-lg-10 { flex: 0 0 83.333333%; }
  .col-lg-9 { flex: 0 0 75%; }
  .col-lg-8 { flex: 0 0 66.666667%; }
  .col-lg-7 { flex: 0 0 58.333333%; }
  .col-lg-6 { flex: 0 0 50%; }
  .col-lg-5 { flex: 0 0 41.666667%; }
  .col-lg-4 { flex: 0 0 33.333333%; }
  .col-lg-3 { flex: 0 0 25%; }
  .col-lg-2 { flex: 0 0 16.666667%; }
  .col-lg-1 { flex: 0 0 8.333333%; }
}

/* 标准PC - 1200px+ */
@media (min-width: 1200px) {
  .col-xl-12 { flex: 0 0 100%; }
  .col-xl-11 { flex: 0 0 91.666667%; }
  .col-xl-10 { flex: 0 0 83.333333%; }
  .col-xl-9 { flex: 0 0 75%; }
  .col-xl-8 { flex: 0 0 66.666667%; }
  .col-xl-7 { flex: 0 0 58.333333%; }
  .col-xl-6 { flex: 0 0 50%; }
  .col-xl-5 { flex: 0 0 41.666667%; }
  .col-xl-4 { flex: 0 0 33.333333%; }
  .col-xl-3 { flex: 0 0 25%; }
  .col-xl-2 { flex: 0 0 16.666667%; }
  .col-xl-1 { flex: 0 0 8.333333%; }
}

/* 大屏 - 1920px+ */
@media (min-width: 1920px) {
  :root {
    --container-max-width: 1600px;
  }
}

/* ===========================
   移动端响应式导航
   =========================== */

/* 手机端 - 隐藏桌面导航，显示移动端菜单 */
@media (max-width: 768px) {
  /* 强制隐藏桌面导航 */
  .header .nav {
    display: none !important;
    visibility: hidden !important;
    opacity: 0 !important;
    pointer-events: none !important;
  }

  /* 确保移动端菜单按钮显示 */
  .mobile-menu-toggle {
    display: flex !important;
    visibility: visible !important;
    opacity: 1 !important;
    pointer-events: auto !important;
  }

  /* 移动端侧边栏样式调整 */
  .mobile-sidebar {
    z-index: 9999;
  }
}

/* 平板端 - 769px到1023px */
@media (min-width: 769px) and (max-width: 1023px) {
  .header .nav {
    display: flex !important;
  }

  .mobile-menu-toggle {
    display: none !important;
  }
}

/* 桌面端 - 1024px及以上 */
@media (min-width: 1024px) {
  .header .nav {
    display: flex !important;
  }

  .mobile-menu-toggle {
    display: none !important;
  }

  .mobile-sidebar {
    display: none !important;
  }
}

/* ===========================
   打印样式
   =========================== */
@media print {
  * {
    background: white !important;
    color: black !important;
    box-shadow: none !important;
  }

  .no-print {
    display: none !important;
  }
}