/* 登录和注册面板样式 */
.login-panel, .register-panel {
  max-width: 450px;
  margin: 80px auto;
  padding: 30px;
  background: rgba(255, 255, 255, 0.95);
  border-radius: 20px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.login-panel .panel-header, .register-panel .panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 30px;
}

.login-panel h2, .register-panel h2 {
  margin: 0;
  font-size: 24px;
  font-weight: 700;
  color: #2d3748;
  text-align: left;
}

.login-panel .form-content, .register-panel .form-content {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.login-panel .form-group, .register-panel .form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.login-panel label, .register-panel label {
  font-weight: 600;
  color: #4a5568;
  font-size: 14px;
}

.login-panel input, .register-panel input {
  padding: 12px 16px;
  border: 2px solid #e2e8f0;
  border-radius: 12px;
  font-size: 16px;
  transition: all 0.3s ease;
  background: #f7fafc;
}

.login-panel input:focus, .register-panel input:focus {
  outline: none;
  border-color: #667eea;
  background: white;
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.login-panel .btn-primary, .register-panel .btn-primary {
  padding: 14px 20px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  border: none;
  border-radius: 12px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
}

.login-panel .btn-primary:hover, .register-panel .btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(102, 126, 234, 0.3);
}

.login-panel .btn-primary:active, .register-panel .btn-primary:active {
  transform: translateY(0);
}

.login-panel .switch-panel, .register-panel .switch-panel {
  text-align: center;
  font-size: 14px;
  color: #718096;
  margin-top: 10px;
}

.login-panel .switch-panel a, .register-panel .switch-panel a {
  color: #667eea;
  font-weight: 600;
  text-decoration: none;
  transition: color 0.2s ease;
}

.login-panel .switch-panel a:hover, .register-panel .switch-panel a:hover {
  color: #764ba2;
  text-decoration: underline;
}

/* 深色主题适配 */
[data-theme="dark"] .login-panel, [data-theme="dark"] .register-panel {
  background: rgba(31, 41, 55, 0.95);
  border-color: rgba(55, 65, 81, 0.5);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}

[data-theme="dark"] .login-panel h2, [data-theme="dark"] .register-panel h2 {
  color: #f7fafc;
}

[data-theme="dark"] .login-panel label, [data-theme="dark"] .register-panel label {
  color: #e2e8f0;
}

[data-theme="dark"] .login-panel input, [data-theme="dark"] .register-panel input {
  background: #2d3748;
  border-color: #4a5568;
  color: #f7fafc;
}

[data-theme="dark"] .login-panel input:focus, [data-theme="dark"] .register-panel input:focus {
  background: #2d3748;
  border-color: #667eea;
}

[data-theme="dark"] .login-panel .switch-panel, [data-theme="dark"] .register-panel .switch-panel {
  color: #a0aec0;
}

/* 响应式设计 */
@media (max-width: 768px) {
  .login-panel, .register-panel {
    margin: 40px 20px;
    padding: 25px;
  }

  .login-panel h2, .register-panel h2 {
    font-size: 20px;
  }

  .login-panel input, .register-panel input {
    padding: 10px 14px;
    font-size: 14px;
  }

  .login-panel .btn-primary, .register-panel .btn-primary {
    padding: 12px 18px;
    font-size: 14px;
  }
}

:root {
  /* 基础颜色 */
  --bg: #f5f7fa;
  --card-bg: #ffffff;
  --text: #333333;
  --border: #e1e5ea;
  --primary: #4361ee;
  --primary-hover: #3a56d4;
  --success: #06d6a0;
  --danger: #ef476f;
  --warning: #ffd166;
  --gray: #6c757d;
  --light-gray: #f8f9fa;
  --sidebar-bg: #ffffff;
  --header-bg: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  
  /* 阴影效果 */
  --shadow: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
  --shadow-xl: 0 12px 32px rgba(0, 0, 0, 0.16);
  --shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.2);
  
  /* 过渡效果 */
  --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  --transition-fast: all 0.2s ease;
  --transition-normal: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  
  /* 统一圆角变量 */
  --radius-xs: 8px;
  --radius-sm: 12px;
  --radius-md: 16px;
  --radius-lg: 20px;
  --radius-xl: 24px;
  --radius-2xl: 32px;
  --radius-full: 9999px;
  
  /* 玻璃态效果变量 */
  --glass-bg: rgba(255, 255, 255, 0.15);
  --glass-border: rgba(255, 255, 255, 0.2);
  --glass-shadow: 0 8px 32px rgba(31, 38, 135, 0.25);
  --glass-backdrop: blur(12px);
  
  /* 渐变背景变量 */
  --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  --gradient-tertiary: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  --gradient-success: linear-gradient(135deg, #06d6a0 0%, #00f5d4 100%);
  --gradient-danger: linear-gradient(135deg, #ef476f 0%, #ffd166 100%);
  --gradient-warning: linear-gradient(135deg, #ffd166 0%, #fca311 100%);
  
  /* 间距变量 */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;
  
  /* 字体大小 */
  --font-xs: 12px;
  --font-sm: 14px;
  --font-base: 16px;
  --font-lg: 18px;
  --font-xl: 20px;
  --font-2xl: 24px;
  --font-3xl: 30px;
  --font-4xl: 36px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1a1a2e;
    --card-bg: #16213e;
    --text: #eeeeee;
    --border: #2a2a4a;
    --light-gray: #222244;
    --sidebar-bg: #16213e;
    --shadow: 0 4px 12px rgba(0,0,0,0.3);
  }
}

/* 手动暗色主题 */
[data-theme="dark"] {
  --bg: #0f0f1a;
  --card-bg: #1a1a2e;
  --text: #e8e8e8;
  --border: #2d3748;
  --light-gray: #1e1e32;
  --sidebar-bg: #1a1a2e;
  --shadow: 0 4px 12px rgba(0,0,0,0.4);
  --primary: #5a7eff;
  --primary-hover: #4a6eef;
}

[data-theme="dark"] body {
  background: var(--bg);
  color: var(--text);
}

[data-theme="dark"] .sidebar {
  background: var(--sidebar-bg);
  border: 1px solid var(--border);
}

[data-theme="dark"] .main-content {
  background: var(--card-bg);
}

[data-theme="dark"] header {
  background: linear-gradient(135deg, #3a4a7a 0%, #4a3a6a 100%);
}

[data-theme="dark"] .upload-area {
  background: var(--light-gray);
  border-color: var(--border);
}

[data-theme="dark"] .upload-area:hover {
  border-color: var(--primary);
  background: #252540;
}

[data-theme="dark"] .toolbar {
  background: var(--card-bg);
  border-color: var(--border);
}

[data-theme="dark"] .search-input {
  background: var(--light-gray);
  border-color: var(--border);
  color: var(--text);
}

[data-theme="dark"] .grid-item,
[data-theme="dark"] .record-card {
  background: var(--light-gray);
  border-color: var(--border);
}

[data-theme="dark"] .grid-item:hover,
[data-theme="dark"] .record-card:hover {
  border-color: var(--primary);
  background: #252540;
}

/* ------------------------ 现代化UI组件样式 ------------------------ */

/* 玻璃态效果 */
.glass-effect {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-backdrop);
  -webkit-backdrop-filter: var(--glass-backdrop);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
  border-radius: var(--radius-md);
  transition: var(--transition-normal);
}

.glass-effect:hover {
  background: rgba(255, 255, 255, 0.2);
  box-shadow: 0 12px 48px rgba(31, 38, 135, 0.5);
}

/* 现代化按钮样式 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-lg);
  border: none;
  border-radius: var(--radius-md);
  font-size: var(--font-base);
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition-normal);
  box-shadow: var(--shadow-sm);
}

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

.btn:active {
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}

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

.btn-primary:hover {
  box-shadow: var(--shadow-md), 0 0 0 8px rgba(67, 97, 238, 0.1);
}

.btn-secondary {
  background: var(--light-gray);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background: var(--border);
  box-shadow: var(--shadow-md);
}

.btn-success {
  background: var(--gradient-success);
  color: white;
}

.btn-danger {
  background: var(--gradient-danger);
  color: white;
}

.btn-warning {
  background: var(--gradient-warning);
  color: white;
}

/* 按钮尺寸变体 */
.btn-sm {
  padding: var(--spacing-xs) var(--spacing-md);
  font-size: var(--font-sm);
  border-radius: var(--radius-sm);
}

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

/* 现代化卡片样式 */
.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: var(--transition-normal);
  overflow: hidden;
}

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

.card-header {
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--border);
  background: var(--light-gray);
  font-weight: 600;
  font-size: var(--font-lg);
}

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

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

/* 现代化输入框样式 */
.input {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  border: 2px solid var(--border);
  border-radius: var(--radius-md);
  font-size: var(--font-base);
  color: var(--text);
  background: var(--card-bg);
  transition: var(--transition-normal);
  box-shadow: var(--shadow-sm);
}

.input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(67, 97, 238, 0.1), var(--shadow-sm);
  transform: translateY(-1px);
}

.input::placeholder {
  color: var(--gray);
}

/* 现代化搜索框样式 */
.search-input {
  position: relative;
  width: 100%;
}

.search-input input {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-lg) var(--spacing-sm) var(--spacing-xl);
  border: 2px solid var(--border);
  border-radius: var(--radius-full);
  font-size: var(--font-base);
  color: var(--text);
  background: var(--card-bg);
  transition: var(--transition-normal);
  box-shadow: var(--shadow-sm);
}

.search-input input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(67, 97, 238, 0.1), var(--shadow-sm);
  transform: translateY(-1px);
}

.search-input::before {
  content: "🔍";
  position: absolute;
  left: var(--spacing-md);
  top: 50%;
  transform: translateY(-50%);
  color: var(--gray);
  font-size: var(--font-sm);
}

/* 现代化的加载动画 */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-xl);
  color: var(--gray);
  font-size: var(--font-lg);
}

.loading::after {
  content: "";
  width: 24px;
  height: 24px;
  margin-left: var(--spacing-sm);
  border: 3px solid var(--light-gray);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

/* 现代化的空状态 */
.empty-state {
  text-align: center;
  padding: var(--spacing-2xl);
  color: var(--gray);
}

.empty-state i {
  font-size: 48px;
  margin-bottom: var(--spacing-md);
  color: var(--primary);
  opacity: 0.3;
}

.empty-state h3 {
  margin-bottom: var(--spacing-sm);
  font-size: var(--font-xl);
  color: var(--text);
}

.empty-state p {
  font-size: var(--font-base);
  opacity: 0.7;
}

/* 现代化的通知样式 */
.notification {
  position: fixed;
  top: var(--spacing-lg);
  right: var(--spacing-lg);
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  background: var(--card-bg);
  border-left: 4px solid var(--primary);
  z-index: 1000;
  animation: slideInRight 0.3s ease, fadeOut 0.3s ease 3s forwards;
  max-width: 400px;
  width: calc(100% - 2 * var(--spacing-lg));
}

.notification.success {
  border-left-color: var(--success);
}

.notification.error {
  border-left-color: var(--danger);
}

.notification.warning {
  border-left-color: var(--warning);
}

@keyframes slideInRight {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

@keyframes fadeOut {
  from {
    opacity: 1;
    transform: translateY(0);
  }
  to {
    opacity: 0;
    transform: translateY(-20px);
  }
}

/* 现代化的滚动条样式 */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--light-gray);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: var(--radius-full);
  transition: var(--transition-fast);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--primary);
}

/* 现代化的渐变文本 */
.gradient-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: 600;
}

/* 现代化的分割线 */
.divider {
  position: relative;
  text-align: center;
  margin: var(--spacing-xl) 0;
  color: var(--gray);
}

.divider::before,
.divider::after {
  content: "";
  position: absolute;
  top: 50%;
  width: 40%;
  height: 1px;
  background: var(--border);
}

.divider::before {
  left: 0;
}

.divider::after {
  right: 0;
}

/* 现代化的悬停效果 */
.hover-lift {
  transition: var(--transition-normal);
}

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

.hover-scale {
  transition: var(--transition-normal);
}

.hover-scale:hover {
  transform: scale(1.02);
  box-shadow: var(--shadow-md);
}

.hover-glow {
  transition: var(--transition-normal);
}

.hover-glow:hover {
  box-shadow: 0 0 20px rgba(67, 97, 238, 0.3);
}

/* 现代化的布局容器 */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

/* 现代化的响应式网格 */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
}

/* 现代化的弹性布局 */
.flex {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.flex-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-md);
}

.flex-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-md);
}

/* 现代化的间距工具类 */
.mb-xs { margin-bottom: var(--spacing-xs); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

.mt-xs { margin-top: var(--spacing-xs); }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

.p-xs { padding: var(--spacing-xs); }
.p-sm { padding: var(--spacing-sm); }
.p-md { padding: var(--spacing-md); }
.p-lg { padding: var(--spacing-lg); }
.p-xl { padding: var(--spacing-xl); }

/* 现代化的文本工具类 */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-xs { font-size: var(--font-xs); }
.text-sm { font-size: var(--font-sm); }
.text-base { font-size: var(--font-base); }
.text-lg { font-size: var(--font-lg); }
.text-xl { font-size: var(--font-xl); }
.text-2xl { font-size: var(--font-2xl); }

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

/* 现代化的过渡工具类 */
.transition {
  transition: var(--transition-normal);
}

.transition-fast {
  transition: var(--transition-fast);
}

.transition-slow {
  transition: var(--transition-slow);
}

/* 现代化的阴影工具类 */
.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }
.shadow-xl { box-shadow: var(--shadow-xl); }
.shadow-hover { box-shadow: var(--shadow-hover); }

/* 现代化的圆角工具类 */
.rounded-xs { border-radius: var(--radius-xs); }
.rounded-sm { border-radius: var(--radius-sm); }
.rounded-md { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }
.rounded-full { border-radius: var(--radius-full); }

/* 现代化的玻璃态工具类 */
.glass {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-backdrop);
  -webkit-backdrop-filter: var(--glass-backdrop);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
}

/* 现代化的渐变背景工具类 */
.gradient-primary { background: var(--gradient-primary); }
.gradient-secondary { background: var(--gradient-secondary); }
.gradient-tertiary { background: var(--gradient-tertiary); }
.gradient-success { background: var(--gradient-success); }
.gradient-danger { background: var(--gradient-danger); }
.gradient-warning { background: var(--gradient-warning); }

/* 现代化的响应式设计 */
@media (max-width: 768px) {
  .container {
    padding: 0 var(--spacing-md);
  }
  
  .grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }
  
  .flex {
    flex-direction: column;
    align-items: stretch;
  }
  
  .flex-between {
    flex-direction: column;
    align-items: stretch;
    gap: var(--spacing-sm);
  }
  
  .notification {
    top: var(--spacing-md);
    right: var(--spacing-md);
    left: var(--spacing-md);
    width: auto;
    max-width: none;
  }
  
  .card {
    border-radius: var(--radius-md);
  }
  
  .btn-lg {
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--font-base);
  }
}

[data-theme="dark"] .nav-links a {
  color: var(--text);
}

[data-theme="dark"] .nav-links a:hover,
[data-theme="dark"] .nav-links a.active {
  background: var(--light-gray);
}

[data-theme="dark"] .quota-display {
  background: var(--light-gray);
}

[data-theme="dark"] .btn-outline {
  border-color: var(--border);
  color: var(--text);
}

[data-theme="dark"] .btn-outline:hover {
  background: var(--light-gray);
  border-color: var(--primary);
}

[data-theme="dark"] input,
[data-theme="dark"] select,
[data-theme="dark"] textarea {
  background: var(--light-gray);
  border-color: var(--border);
  color: var(--text);
}

[data-theme="dark"] .folder-item {
  background: var(--light-gray);
  border-color: var(--border);
}

[data-theme="dark"] .folder-item:hover,
[data-theme="dark"] .folder-item.active {
  background: #252540;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

.app-container {
  display: flex;
  min-height: calc(100vh - 40px);
  max-width: 1400px;
  margin: 20px auto;
  gap: 20px;
  padding: 0 20px;
}

/* 侧边栏遮罩层 */
.sidebar-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 998;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.sidebar-overlay.active {
  opacity: 1;
  visibility: visible;
}

/* 侧边栏折叠按钮 */
.sidebar-toggle {
  position: absolute;
  top: 20px;
  left: 20px;
  width: 36px;
  height: 36px;
  background: var(--primary);
  color: white;
  border: none;
  border-radius: 12px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  box-shadow: var(--shadow-md);
  z-index: 1000;
  transition: all 0.3s ease;
}

.sidebar-toggle:hover {
  transform: scale(1.1);
  background: var(--primary-hover);
  box-shadow: var(--shadow-lg);
}

/* 侧边栏折叠状态下的按钮位置 */
.sidebar.collapsed .sidebar-toggle {
  left: 15px;
}

/* 侧边栏 */
.sidebar {
  width: 280px;
  background: var(--sidebar-bg);
  border-radius: 16px;
  padding: 25px;
  box-shadow: var(--shadow);
  height: fit-content;
  position: sticky;
  top: 20px;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 999;
  overflow: hidden;
}

/* 侧边栏折叠状态 */
.sidebar.collapsed {
  width: 80px;
  padding: 25px 10px;
  transform: translateX(0);
}

/* 侧边栏展开/折叠动画优化 */
.sidebar::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(67, 97, 238, 0.1) 0%, transparent 100%);
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}

.sidebar:hover::before {
  opacity: 1;
}

/* 侧边栏内部元素过渡效果 */
.sidebar * {
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 折叠时隐藏文字内容 */
.sidebar.collapsed .site-title,
.sidebar.collapsed .user-details,
.sidebar.collapsed .quota-title,
.sidebar.collapsed .quota-info,
.sidebar.collapsed .quota-remaining,
.sidebar.collapsed .nav-links a span,
.sidebar.collapsed .logout-btn span {
  opacity: 0;
  transform: translateX(-10px);
  pointer-events: none;
}

/* 折叠时显示的元素 */
.sidebar.collapsed .site-branding,
.sidebar.collapsed .user-info,
.sidebar.collapsed .quota-display,
.sidebar.collapsed .nav-links,
.sidebar.collapsed .logout-btn {
  opacity: 1;
  transform: translateX(0);
}

/* 折叠时调整元素 */
.sidebar.collapsed .site-branding {
  text-align: center;
  padding: 10px;
}

.sidebar.collapsed .site-logo {
  max-width: 40px;
  max-height: 40px;
  margin: 0 auto;
}

.sidebar.collapsed .user-info {
  justify-content: center;
  padding-bottom: 15px;
}

.sidebar.collapsed .avatar {
  margin-right: 0;
  width: 40px;
  height: 40px;
  font-size: 16px;
}

.sidebar.collapsed .quota-display {
  padding: 10px;
}

.sidebar.collapsed .nav-links a {
  justify-content: center;
  padding: 12px 8px;
}

.sidebar.collapsed .nav-links a i {
  margin-right: 0;
  font-size: 20px;
}

.sidebar.collapsed .logout-btn {
  justify-content: center;
  margin-top: 15px;
}

.sidebar.collapsed .logout-btn i {
  margin-right: 0;
}

/* 主内容区过渡效果 */
.main-content {
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  flex: 1;
  min-width: 0;
}

/* 移动端菜单按钮 */
.mobile-menu-btn {
  display: none;
  background: rgba(255,255,255,0.2);
  border: none;
  width: 44px;
  height: 44px;
  min-width: 44px;
  min-height: 44px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
  padding: 0;
  flex-shrink: 0;
}

.mobile-menu-btn:hover {
  background: rgba(255,255,255,0.3);
  transform: scale(1.1);
}

.user-info {
  display: flex;
  align-items: center;
  margin-bottom: 25px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}

.avatar {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: bold;
  font-size: 20px;
  margin-right: 15px;
}

.user-details h3 {
  margin-bottom: 5px;
  font-size: 18px;
}

.user-details p {
  color: var(--gray);
  font-size: 14px;
}

/* 配额显示 */
.quota-display {
  background: var(--light-gray);
  border-radius: 12px;
  padding: 15px;
  margin-bottom: 20px;
}

.quota-title {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--text);
}

.quota-bar {
  height: 8px;
  background: var(--border);
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: 8px;
}

.quota-fill {
  height: 100%;
  background: var(--primary);
  border-radius: 4px;
  transition: width 0.5s ease, background 0.3s ease;
}

.quota-fill.warning {
  background: var(--warning);
}

.quota-fill.danger {
  background: var(--danger);
}

.quota-info {
  font-size: 12px;
  color: var(--gray);
  display: flex;
  justify-content: space-between;
}

.quota-remaining {
  font-size: 11px;
  color: var(--gray);
  margin-top: 5px;
  text-align: right;
}

.quota-warning {
  background: rgba(255, 209, 102, 0.2);
  border: 1px solid var(--warning);
  color: #856404;
  padding: 10px 15px;
  border-radius: 8px;
  margin-bottom: 15px;
  font-size: 13px;
}

.quota-error {
  background: rgba(239, 71, 111, 0.1);
  border: 1px solid var(--danger);
  color: var(--danger);
  padding: 10px 15px;
  border-radius: 8px;
  margin-bottom: 15px;
  font-size: 13px;
}

.nav-links {
  list-style: none;
}

.nav-links li {
  margin-bottom: 10px;
}

.nav-links a {
  display: flex;
  align-items: center;
  padding: 12px 15px;
  text-decoration: none;
  color: var(--text);
  border-radius: 10px;
  transition: var(--transition);
  font-weight: 500;
}

.nav-links a:hover, .nav-links a.active {
  background: rgba(67, 97, 238, 0.1);
  color: var(--primary);
}

.nav-links a i {
  margin-right: 10px;
  font-size: 18px;
}

.logout-btn {
  display: flex;
  align-items: center;
  width: 100%;
  padding: 12px 15px;
  background: none;
  border: none;
  text-align: left;
  color: var(--danger);
  border-radius: 10px;
  cursor: pointer;
  font-weight: 500;
  transition: var(--transition);
  margin-top: 20px;
}

.logout-btn:hover {
  background: rgba(239, 71, 111, 0.1);
}

.logout-btn i {
  margin-right: 10px;
  font-size: 18px;
}

/* 主内容区 */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

header {
  background: var(--header-bg);
  color: white;
  border-radius: 16px;
  padding: 30px;
  box-shadow: var(--shadow);
  text-align: center;
}

h1 {
  font-size: 2.5rem;
  margin-bottom: 12px;
  font-weight: 800;
  text-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.subtitle {
  font-size: 1.1rem;
  opacity: 0.9;
  letter-spacing: 0.5px;
  max-width: 600px;
  margin: 0 auto;
}

.panel {
  background: var(--card-bg);
  border-radius: 16px;
  padding: 30px;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.panel:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(0,0,0,0.12);
}

.panel-title {
  font-size: 1.5rem;
  margin-bottom: 20px;
  padding-bottom: 15px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 10px;
}

.panel-title i {
  font-size: 1.8rem;
}

.form-group {
  margin: 20px 0;
}

label {
  display: block;
  margin-bottom: 8px;
  font-weight: 600;
  color: var(--text);
}

input[type="text"],
input[type="password"] {
  width: 100%;
  padding: 14px 16px;
  border: 2px solid var(--border);
  border-radius: 12px;
  background: var(--card-bg);
  color: var(--text);
  font-size: 16px;
  transition: var(--transition);
}

input[type="text"]:focus,
input[type="password"]:focus {
  border-color: var(--primary);
  outline: none;
  box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.2);
}

button {
  background: var(--primary);
  color: white;
  border: none;
  border-radius: 12px;
  padding: 14px 24px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

button:hover {
  background: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 8px rgba(0,0,0,0.15);
}

button:active {
  transform: translateY(0);
}

button:disabled {
  background: #adb5bd;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

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

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

.btn-danger {
  background: var(--danger);
}

.btn-danger:hover {
  background: #d32f5f;
}

.switch-panel {
  text-align: center;
  margin-top: 25px;
  padding: 20px;
  border-radius: 12px;
  background: var(--light-gray);
}

.switch-panel a {
  color: var(--primary);
  text-decoration: none;
  font-weight: 600;
  margin: 0 8px;
  transition: var(--transition);
}

.switch-panel a:hover {
  text-decoration: underline;
}

/* 上传区域 */
.upload-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

@media (max-width: 992px) {
  .upload-section {
    grid-template-columns: 1fr;
  }
}

.drop-zone {
  border: 3px dashed var(--border);
  border-radius: 16px;
  padding: 40px 20px;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
  background: var(--card-bg);
  position: relative;
  overflow: hidden;
}

.drop-zone:hover, .drop-zone.drag-over {
  border-color: var(--primary);
  background: rgba(67, 97, 238, 0.1);
  transform: translateY(-1px);
}

.drop-zone.drag-over {
  border-color: var(--primary);
  box-shadow: 0 0 15px rgba(67, 97, 238, 0.2);
  background: rgba(67, 97, 238, 0.15);
  transform: scale(1.02) translateY(-2px);
}

.browse-link {
  color: var(--primary);
  text-decoration: underline;
  cursor: pointer;
  font-weight: 600;
}

/* 预览区 */
.preview-container {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin: 25px 0;
}

.preview-item {
  position: relative;
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  background: var(--card-bg);
  transition: var(--transition);
  box-shadow: 0 2px 6px rgba(0,0,0,0.05);
  display: flex;
  align-items: center;
  padding: 10px;
}

.preview-item:hover {
  transform: translateY(-3px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.preview-thumb {
  width: 60px;
  height: 60px;
  object-fit: cover;
  display: block;
  border-radius: 8px;
  margin-right: 15px;
}

.preview-info {
  flex: 1;
  min-width: 0;
}

.preview-name {
  font-size: 14px;
  margin-bottom: 5px;
  word-break: break-all;
  color: var(--text);
}

.preview-size {
  font-size: 12px;
  color: var(--gray);
}

.remove-preview {
  position: static;
  background: rgba(239, 71, 111, 0.9);
  color: white;
  border: none;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  font-size: 16px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  box-shadow: 0 2px 4px rgba(0,0,0,0.2);
  margin-left: 10px;
}

.remove-preview:hover {
  background: rgba(239, 71, 111, 1);
  transform: scale(1.1);
}

.video-icon {
  position: absolute;
  bottom: 6px;
  right: 6px;
  background: rgba(0,0,0,0.7);
  color: white;
  border-radius: 4px;
  padding: 3px 6px;
  font-size: 11px;
  font-weight: 600;
}

.progress-container {
  margin: 10px 0 0 0;
  display: none;
  width: 100%;
}

.progress-bar {
  height: 10px;
  background: var(--light-gray);
  border-radius: 5px;
  overflow: hidden;
  box-shadow: inset 0 1px 2px rgba(0,0,0,0.1);
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--success), #06d6a0);
  width: 0%;
  transition: width 0.4s ease;
  border-radius: 5px;
}

.log-container {
  max-height: 200px;
  overflow-y: auto;
  background-color: #f5f5f5;
  border: 1px solid #ddd;
  border-radius: 4px;
  padding: 10px;
  margin-top: 20px;
  font-family: monospace;
  font-size: 14px;
}

.log-info {
  color: #333;
  margin: 2px 0;
}

.log-error {
  color: #d32f2f;
  margin: 2px 0;
  font-weight: bold;
}

#log {
  margin-top: 20px;
  padding: 16px;
  background: #2c2c2c;
  color: #fff;
  border-radius: 12px;
  font-family: 'Fira Code', 'Consolas', monospace;
  white-space: pre-wrap;
  max-height: 250px;
  overflow-y: auto;
  box-shadow: inset 0 2px 4px rgba(0,0,0,0.2);
}

/* 记录区 */
.records-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  flex-wrap: wrap;
  gap: 15px;
  padding-bottom: 15px;
  border-bottom: 1px solid var(--border);
}

.records-actions {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}

/* 确保三个下拉菜单横向排列 */
.records-actions select {
  display: inline-block;
  margin: 0;
  vertical-align: middle;
}

/* 调整下拉菜单样式 */
#fileTypeFilter, #viewMode, #sortBy {
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--card-bg);
  font-size: 14px;
  cursor: pointer;
  min-width: 120px;
}

.records-actions input {
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
}

.toggle-records, .clear-local {
  font-size: 14px;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--primary);
  font-weight: 600;
  padding: 10px 14px;
  border-radius: 8px;
  transition: var(--transition);
}

.toggle-records:hover, .clear-local:hover {
  background: rgba(67, 97, 238, 0.1);
}

.record-cards {
  display: flex;
  flex-direction: column;
  gap: 15px;
  margin-top: 20px;
}

.record-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 15px 20px;
  word-break: break-all;
  transition: var(--transition);
  box-shadow: 0 2px 6px rgba(0,0,0,0.05);
  display: flex;
  align-items: center;
  gap: 15px;
}

.record-card:hover {
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  border-color: var(--primary);
}

.record-name {
  font-weight: 700;
  margin-bottom: 12px;
  font-size: 16px;
  color: var(--primary);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.record-url {
  color: var(--primary);
  font-size: 14px;
  margin: 10px 0;
  display: block;
  padding: 12px;
  background: var(--light-gray);
  border-radius: 8px;
  word-break: break-all;
  transition: var(--transition);
  text-decoration: none;
}

.record-url:hover {
  background: rgba(67, 97, 238, 0.1);
}

.record-meta {
  font-size: 13px;
  color: var(--gray);
  padding: 10px 0;
  border-top: 1px dashed var(--border);
  margin-top: 10px;
}

.record-actions {
  display: flex;
  gap: 10px;
  margin-top: 15px;
  flex-wrap: wrap;
}

.record-actions button {
  padding: 10px 16px;
  font-size: 14px;
  border-radius: 8px;
}

.empty-state, .loading {
  text-align: center;
  padding: 50px 20px;
  color: var(--gray);
}

.empty-state i, .loading i {
  font-size: 3rem;
  margin-bottom: 15px;
  display: block;
}

/* 分页 */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 10px;
  margin-top: 30px;
  padding: 20px 0;
}

.pagination button {
  padding: 10px 16px;
  font-size: 14px;
}

.pagination-info {
  font-size: 14px;
  color: var(--gray);
}

/* 预览模态框 */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.85);
  z-index: 10000;
  justify-content: center;
  align-items: center;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  animation: modalFadeIn 0.3s ease;
}

@keyframes modalFadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes modalContentIn {
  from {
    opacity: 0;
    transform: scale(0.9) translateY(20px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

.modal-content {
  position: relative;
  max-width: 90vw;
  max-height: 85vh;
  background: #1a1a2e;
  border-radius: 16px;
  box-shadow: 0 25px 80px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(255, 255, 255, 0.1);
  overflow: hidden;
  animation: modalContentIn 0.3s ease;
}

.modal-content::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), #a855f7, #ec4899);
}

.modal img {
  display: block;
  max-width: 90vw;
  max-height: 85vh;
  object-fit: contain;
  border-radius: 12px;
  margin: 0 auto;
}

.modal video,
.modal audio {
  display: block;
  max-width: 90vw;
  max-height: 80vh;
  outline: none;
  border-radius: 12px;
  background: #000;
}

.modal iframe {
  border-radius: 0 0 12px 12px;
}

.close-modal {
  position: fixed;
  top: 20px;
  right: 30px;
  width: 50px;
  height: 50px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  color: white;
  font-size: 28px;
  line-height: 46px;
  text-align: center;
  cursor: pointer;
  transition: all 0.3s ease;
  z-index: 10001;
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
}

.close-modal:hover {
  background: rgba(255, 255, 255, 0.2);
  border-color: rgba(255, 255, 255, 0.4);
  transform: rotate(90deg) scale(1.1);
}

.close-modal:active {
  transform: rotate(90deg) scale(0.95);
}

/* 预览框内容工具栏 */
.preview-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 15px 20px;
  background: rgba(255, 255, 255, 0.05);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.preview-toolbar .btn {
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 14px;
  text-decoration: none;
  transition: all 0.2s ease;
}

.preview-toolbar .btn-primary {
  background: var(--primary);
  color: white;
  border: none;
}

.preview-toolbar .btn-outline {
  background: transparent;
  color: white;
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.preview-toolbar .btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

/* 预览框加载状态 */
.preview-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 60px;
  color: rgba(255, 255, 255, 0.7);
}

.preview-loading .spinner {
  width: 50px;
  height: 50px;
  border: 3px solid rgba(255, 255, 255, 0.1);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-bottom: 20px;
}

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

/* 预览框错误状态 */
.preview-error {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 60px;
  color: #ff6b6b;
  text-align: center;
}

.preview-error .error-icon {
  font-size: 48px;
  margin-bottom: 15px;
}

/* 移动端预览框优化 */
@media (max-width: 768px) {
  .modal-content {
    max-width: 95vw;
    max-height: 90vh;
    border-radius: 12px;
  }
  
  .close-modal {
    top: 10px;
    right: 10px;
    width: 40px;
    height: 40px;
    font-size: 24px;
    line-height: 38px;
  }
  
  .modal img {
    max-width: 95vw;
    max-height: 80vh;
  }
  
  .modal video {
    max-width: 95vw;
    max-height: 70vh;
  }
}

/* 管理员设置 */
.admin-settings {
  margin-top: 30px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}

.setting-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 15px 0;
  border-bottom: 1px solid var(--border);
}

.setting-info {
  flex: 1;
}

.setting-info h3 {
  margin-bottom: 5px;
}

.setting-info p {
  color: var(--gray);
  font-size: 14px;
}

.toggle-switch {
  position: relative;
  display: inline-block;
  width: 60px;
  height: 30px;
}

.toggle-switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #ccc;
  transition: .4s;
  border-radius: 30px;
}

.slider:before {
  position: absolute;
  content: "";
  height: 22px;
  width: 22px;
  left: 4px;
  bottom: 4px;
  background-color: white;
  transition: .4s;
  border-radius: 50%;
}

input:checked + .slider {
  background-color: var(--success);
}

input:checked + .slider:before {
  transform: translateX(30px);
}

footer {
  text-align: center;
  margin-top: 40px;
  color: var(--gray);
  font-size: 14px;
  padding: 20px;
}

/* 平板端响应式设计（768px-1024px） */
@media (max-width: 1024px) {
  .app-container {
    flex-direction: column;
    gap: 15px;
    margin: 15px auto;
    padding: 0 15px;
  }
  
  .sidebar {
    width: 100%;
    position: relative;
    top: 0;
    max-width: 100%;
  }
  
  .main-content {
    gap: 15px;
  }
  
  /* 调整面板内边距 */
  .panel {
    padding: 25px;
  }
  
  /* 调整上传区域布局 */
  .upload-section {
    grid-template-columns: 1fr;
  }
  
  /* 调整记录列表操作栏 */
  .records-actions {
    flex-wrap: wrap;
    gap: 8px;
  }
  
  /* 调整网格视图 */
  .records-grid {
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 15px;
  }
  
  /* 上传选项面板响应式调整 */
  .upload-options-panel {
    margin-bottom: 15px;
  }
  
  .upload-options-panel .panel-header {
    padding: 12px 15px;
  }
  
  .upload-options-panel .panel-content {
    padding: 15px;
  }
}

/* 移动端响应式设计（<768px） */
@media (max-width: 768px) {
  /* 显示移动端菜单按钮 */
  .mobile-menu-btn {
    display: flex;
  }
  
  /* 隐藏PC端折叠按钮 */
  .sidebar-toggle {
    display: none;
  }
  
  .app-container {
    flex-direction: column;
    gap: 10px;
    margin: 10px auto;
    padding: 0 10px;
    position: relative;
  }
  
  /* 移动端侧边栏默认隐藏，使用绝对定位 */
  .sidebar {
    position: fixed;
    top: 0;
    left: -100%;
    height: 100vh;
    width: 280px;
    max-width: 80vw;
    border-radius: 0;
    box-shadow: var(--shadow-xl);
    padding: 25px;
    transition: transform 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    z-index: 999;
    overflow-y: auto;
  }
  
  /* 移动端侧边栏显示状态 */
  .sidebar.mobile-open {
    transform: translateX(100%);
    left: 0;
  }
  
  /* 主内容区全屏显示 */
  .main-content {
    flex: 1;
    gap: 10px;
    width: 100%;
  }
  
  /* 调整header样式 */
  header {
    padding: 20px;
  }
  
  h1 {
    font-size: 1.8rem;
  }
  
  .subtitle {
    font-size: 0.9rem;
  }
  
  /* 调整面板样式 */
  .panel {
    padding: 20px;
    border-radius: 12px;
  }
  
  .panel-title {
    font-size: 1.3rem;
    padding-bottom: 10px;
  }
  
  /* 调整上传区域 */
  .drop-zone {
    padding: 30px 15px;
  }
  
  /* 上传选项面板移动端调整 */
  .upload-options-panel {
    margin-bottom: 15px;
  }
  
  .upload-options-panel .panel-header {
    padding: 12px;
  }
  
  .upload-options-panel .panel-header h3 {
    font-size: 14px;
  }
  
  .upload-options-panel .panel-content {
    padding: 12px;
  }
  
  .upload-options-panel .panel-content label {
    font-size: 13px;
  }
  
  /* 调整工具栏 */
  .files-toolbar {
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
  }
  
  .toolbar-left, .toolbar-right {
    justify-content: center;
  }
  
  /* 调整记录列表 */
  .records-header {
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
  }
  
  .records-actions {
    width: 100%;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
  }
  
  /* 移动端下拉菜单样式 */
  #fileTypeFilter, #viewMode, #sortBy {
    min-width: 100px;
    flex: 1;
    max-width: 150px;
  }
  
  /* 调整网格视图 */
  .records-grid {
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 10px;
  }
  
  /* 调整预览容器 */
  .preview-container {
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: 8px;
  }
  
  /* 优化触摸目标大小 */
  button, .btn, .nav-links a, .logout-btn, .folder-item, .grid-item, .record-item {
    min-width: 44px;
    min-height: 44px;
    padding: 10px;
  }
  
  /* 调整输入框大小 */
  input, select, textarea {
    min-height: 44px;
    padding: 12px;
  }
  
  /* 调整分页控件 */
  .pagination {
    flex-direction: column;
    gap: 10px;
  }
  
  /* 调整模态框 */
  .modal-content {
    max-width: 95vw;
    max-height: 90vh;
  }
  
  /* 调整文件夹列表 */
  .folder-list {
    gap: 8px;
  }
  
  .folder-item {
    min-width: 120px;
    padding: 12px;
  }
  
  /* 调整记录项 */
  .record-item {
    padding: 12px;
  }
  
  /* 调整记录操作按钮 */
  .record-actions button {
    min-width: 40px;
    min-height: 40px;
    padding: 8px;
    font-size: 12px;
  }
}

@media (max-width: 768px) {
  .app-container {
    margin: 10px auto;
    padding: 0 10px;
  }
  
  .panel { 
    padding: 20px; 
  }
  
  h1 { 
    font-size: 2rem; 
  }
  
  .record-cards { 
    grid-template-columns: 1fr; 
  }
  
  .records-actions { 
    width: 100%; 
    justify-content: space-between; 
  }
  
  .preview-container {
    grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
  }
  
  .record-name {
    font-size: 15px;
  }
  
  .upload-section {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  body {
    padding: 0;
  }
  
  header {
    padding: 20px 15px;
  }
  
  h1 {
    font-size: 1.8rem;
  }
  
  .subtitle {
    font-size: 1rem;
  }
  
  .panel {
    padding: 15px;
  }
  
  .records-header {
    flex-direction: column;
    align-items: stretch;
  }
  
  .records-actions {
    flex-direction: column;
  }
  
  .records-actions input {
    width: 100%;
  }
}

/* 用户设置页面配额详情 */
.quota-detail {
  width: 100%;
  max-width: 400px;
}

.quota-bar-large {
  height: 12px;
  background: var(--border);
  border-radius: 6px;
  overflow: hidden;
  margin-bottom: 15px;
}

.quota-fill-large {
  height: 100%;
  background: var(--primary);
  border-radius: 6px;
  transition: width 0.5s ease, background 0.3s ease;
}

.quota-fill-large.warning {
  background: var(--warning);
}

.quota-fill-large.danger {
  background: var(--danger);
}

.quota-stats {
  display: flex;
  justify-content: space-between;
  gap: 15px;
}

.quota-stat {
  text-align: center;
  flex: 1;
}

.quota-stat .stat-label {
  display: block;
  font-size: 12px;
  color: var(--gray);
  margin-bottom: 5px;
}

.quota-stat .stat-value {
  display: block;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
}

/* 设置项样式优化 */
.setting-item {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding: 20px 0;
  border-bottom: 1px solid var(--border);
}

.setting-item:last-child {
  border-bottom: none;
}

.setting-info h3 {
  margin-bottom: 5px;
  font-size: 16px;
}

.setting-info p {
  color: var(--gray);
  font-size: 14px;
}


/* ========== 上传选项折叠面板样式 ========== */
.upload-options-panel {
  background: var(--card-bg);
  border-radius: 12px;
  margin-bottom: 20px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  overflow: hidden;
  transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.upload-options-panel:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.upload-options-panel .panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 20px;
  background: linear-gradient(135deg, var(--light-gray) 0%, rgba(67, 97, 238, 0.05) 100%);
  cursor: pointer;
  transition: all 0.3s ease;
  border-bottom: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}

.upload-options-panel .panel-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(67, 97, 238, 0.1), transparent);
  transition: left 0.5s ease;
}

.upload-options-panel .panel-header:hover::before {
  left: 100%;
}

.upload-options-panel .panel-header:hover {
  background: linear-gradient(135deg, rgba(67, 97, 238, 0.1) 0%, rgba(67, 97, 238, 0.15) 100%);
  border-color: var(--primary);
}

.upload-options-panel .panel-header h3 {
  margin: 0;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 8px;
  z-index: 1;
  transition: color 0.3s ease;
}

.upload-options-panel .panel-header:hover h3 {
  color: var(--primary);
}

.upload-options-panel .toggle-icon {
  font-size: 14px;
  color: var(--gray);
  transition: all 0.3s ease;
  font-weight: bold;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--card-bg);
  border: 1px solid var(--border);
}

.upload-options-panel .panel-header:hover .toggle-icon {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
  transform: rotate(-90deg);
}

.upload-options-panel.collapsed .toggle-icon {
  transform: rotate(-90deg);
}

.upload-options-panel .panel-content {
  padding: 20px;
  max-height: 500px;
  overflow: hidden;
  transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  background: var(--card-bg);
}

.upload-options-panel.collapsed .panel-content {
  max-height: 0;
  padding: 0 20px;
  opacity: 0;
  border-top: none;
}

/* 折叠面板内容样式优化 */
.upload-options-panel .panel-content > div:first-child {
  color: var(--text);
  font-size: 13px;
  opacity: 0.8;
  margin-bottom: 15px;
  font-style: italic;
}

.upload-options-panel .panel-content label {
  font-weight: 500;
  color: var(--text);
  font-size: 14px;
  transition: all 0.2s ease;
  padding: 8px 0;
  border-radius: 6px;
  padding-left: 8px;
}

.upload-options-panel .panel-content label:hover {
  color: var(--primary);
  background: rgba(67, 97, 238, 0.1);
  transform: translateX(4px);
}

.upload-options-panel .panel-content input[type="checkbox"] {
  width: 18px;
  height: 18px;
  cursor: pointer;
  accent-color: var(--primary);
  transition: all 0.2s ease;
}

.upload-options-panel .panel-content input[type="checkbox"]:hover {
  transform: scale(1.1);
}

.upload-options-panel .panel-content input[type="checkbox"]:checked {
  transform: scale(1.1);
  box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.2);
}

.upload-options-panel .panel-content input[type="range"] {
  accent-color: var(--primary);
  transition: all 0.2s ease;
}

.upload-options-panel .panel-content input[type="range"]:hover {
  transform: scale(1.02);
}

.upload-options-panel .panel-content input[type="number"],
.upload-options-panel .panel-content select,
.upload-options-panel .panel-content input[type="text"] {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 10px;
  color: var(--text);
  transition: all 0.2s ease;
  font-size: 14px;
  box-shadow: var(--shadow-sm);
}

.upload-options-panel .panel-content input[type="number"]:focus,
.upload-options-panel .panel-content select:focus,
.upload-options-panel .panel-content input[type="text"]:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.2), var(--shadow-md);
  transform: translateY(-1px);
}

.upload-options-panel .panel-content input[type="number"]:hover,
.upload-options-panel .panel-content select:hover,
.upload-options-panel .panel-content input[type="text"]:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
}

/* 选项组样式 */
.upload-options-panel .panel-content #compressOptions,
.upload-options-panel .panel-content #watermarkOptions {
  background: linear-gradient(135deg, var(--light-gray) 0%, rgba(67, 97, 238, 0.05) 100%);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
}

.upload-options-panel .panel-content #compressOptions:hover,
.upload-options-panel .panel-content #watermarkOptions:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--primary);
}

/* 侧边栏折叠状态适配 */
.sidebar.collapsed .upload-options-panel {
  display: none;
}

/* 暗色主题优化 */
[data-theme="dark"] .upload-options-panel .panel-header {
  background: linear-gradient(135deg, var(--light-gray) 0%, rgba(90, 126, 255, 0.1) 100%);
}

[data-theme="dark"] .upload-options-panel .panel-header:hover {
  background: linear-gradient(135deg, rgba(90, 126, 255, 0.1) 0%, rgba(90, 126, 255, 0.2) 100%);
}

[data-theme="dark"] .upload-options-panel .panel-content > div:first-child {
  color: var(--text-secondary);
}

[data-theme="dark"] .upload-options-panel .panel-content #compressOptions,
[data-theme="dark"] .upload-options-panel .panel-content #watermarkOptions {
  background: linear-gradient(135deg, var(--light-gray) 0%, rgba(90, 126, 255, 0.1) 100%);
}

/* ========== 站点品牌样式 ========== */
.site-branding {
  padding: 15px 20px;
  border-bottom: 1px solid var(--border);
  text-align: center;
  margin-bottom: 15px;
}

.site-branding .site-logo {
  max-width: 150px;
  max-height: 50px;
  object-fit: contain;
}

.site-branding .site-title {
  color: var(--primary);
  font-size: 18px;
  font-weight: 600;
  margin: 0;
  letter-spacing: 1px;
}

/* ========== 公告栏样式 ========== */
.announcement-bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  padding: 10px 20px;
  z-index: 9999;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.announcement-content {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

.announcement-icon {
  font-size: 18px;
}

.announcement-text {
  flex: 1;
  text-align: center;
}

.announcement-text a {
  color: #fff;
  text-decoration: underline;
}

.announcement-close {
  background: none;
  border: none;
  color: white;
  font-size: 24px;
  cursor: pointer;
  padding: 0 5px;
  line-height: 1;
  opacity: 0.8;
  transition: opacity 0.2s;
}

.announcement-close:hover {
  opacity: 1;
  background: none;
  transform: none;
}

/* 有公告时调整页面布局 */
body:has(.announcement-bar) {
  padding-top: 50px;
}

body:has(.announcement-bar) .sidebar {
  top: 70px;
}

/* ========== 页脚样式 ========== */
footer {
  background: var(--card-bg);
  color: var(--gray);
  padding: 25px 20px;
  text-align: center;
  border-top: 1px solid var(--border);
  margin-top: 30px;
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
}

.footer-custom {
  margin-bottom: 15px;
  line-height: 1.6;
  color: var(--text);
}

.footer-custom a {
  color: var(--primary);
  text-decoration: none;
}

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

.footer-info {
  margin-bottom: 10px;
  font-size: 14px;
}

.footer-info .copyright {
  margin-right: 20px;
}

.footer-info .icp a {
  color: var(--gray);
  text-decoration: none;
}

.footer-info .icp a:hover {
  color: var(--primary);
}

.footer-contact {
  font-size: 13px;
  color: var(--gray);
  margin-top: 10px;
}

.footer-contact span {
  margin: 0 10px;
}

/* ========== 登录面板品牌 ========== */
#loginPanel h2,
#registerPanel h2 {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}


/* ========== 文件工具栏样式 ========== */
.files-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px;
  background: var(--light-gray);
  border-radius: 12px;
  margin-bottom: 20px;
  flex-wrap: wrap;
  gap: 10px;
}

.toolbar-left, .toolbar-right {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.btn-small {
  padding: 8px 16px;
  font-size: 14px;
  border-radius: 8px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  color: var(--text);
  cursor: pointer;
  transition: var(--transition);
}

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

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

.btn-small.btn-danger:hover {
  background: var(--danger);
  border-color: var(--danger);
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 5px;
  cursor: pointer;
  font-size: 14px;
}

.checkbox-label input[type="checkbox"] {
  width: 18px;
  height: 18px;
  cursor: pointer;
}

/* ========== 文件夹列表样式 ========== */
.folder-list {
  display: flex;
  flex-wrap: wrap;
  gap: 15px;
  margin-bottom: 20px;
  padding: 15px;
  background: var(--light-gray);
  border-radius: 12px;
}

.folder-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 20px;
  background: var(--card-bg);
  border-radius: 10px;
  cursor: pointer;
  transition: var(--transition);
  border: 2px solid transparent;
}

.folder-item:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.folder-item.active {
  border-color: var(--primary);
}

.folder-icon {
  font-size: 24px;
}

.folder-info {
  display: flex;
  flex-direction: column;
}

.folder-name {
  font-weight: 600;
  font-size: 14px;
}

.folder-count {
  font-size: 12px;
  color: var(--gray);
}

.folder-actions {
  display: flex;
  gap: 5px;
  margin-left: auto;
}

.folder-actions button {
  padding: 4px 8px;
  font-size: 12px;
  background: transparent;
  border: none;
  cursor: pointer;
  opacity: 0.6;
  transition: opacity 0.2s;
}

.folder-actions button:hover {
  opacity: 1;
}

/* ========== 网格视图样式 ========== */
.records-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 20px;
}

.grid-item {
  background: var(--card-bg);
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border);
  transition: var(--transition);
  position: relative;
}

.grid-item:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 16px rgba(0,0,0,0.1);
}

.grid-item .select-checkbox {
  position: absolute;
  top: 10px;
  left: 10px;
  z-index: 10;
}

.grid-item .thumbnail {
  width: 100%;
  height: 140px;
  object-fit: cover;
  background: var(--light-gray);
}

.grid-item .file-icon {
  width: 100%;
  height: 140px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 48px;
  background: var(--light-gray);
}

.grid-item .info {
  padding: 12px;
}

.grid-item .filename {
  font-size: 13px;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-bottom: 5px;
}

.grid-item .meta {
  font-size: 11px;
  color: var(--gray);
}

.grid-item .actions {
  display: flex;
  gap: 5px;
  padding: 8px 12px;
  border-top: 1px solid var(--border);
  background: var(--light-gray);
}

.grid-item .actions button {
  flex: 1;
  padding: 6px;
  font-size: 12px;
  border-radius: 6px;
}

/* ========== 回收站样式 ========== */
.trash-item {
  background: rgba(239, 71, 111, 0.05);
  border-left: 3px solid var(--danger);
}

.trash-item .expires-info {
  color: var(--danger);
  font-size: 12px;
}

/* ========== 分享管理样式 ========== */
.share-item {
  background: var(--card-bg);
  border-radius: 12px;
  padding: 15px;
  margin-bottom: 15px;
  border: 1px solid var(--border);
}

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

.share-item .share-url {
  background: var(--light-gray);
  padding: 10px;
  border-radius: 8px;
  font-family: monospace;
  font-size: 13px;
  word-break: break-all;
  margin-bottom: 10px;
}

.share-item .share-stats {
  display: flex;
  gap: 20px;
  font-size: 13px;
  color: var(--gray);
}

.share-item .share-actions {
  display: flex;
  gap: 10px;
  margin-top: 10px;
}

/* ========== 模态框样式 ========== */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10000;
}

.modal-box {
  background: var(--card-bg);
  border-radius: 16px;
  padding: 30px;
  max-width: 500px;
  width: 90%;
  max-height: 80vh;
  overflow-y: auto;
  box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}

.modal-box h3 {
  margin-bottom: 20px;
  font-size: 20px;
}

.modal-box .form-group {
  margin-bottom: 15px;
}

.modal-box .form-group label {
  display: block;
  margin-bottom: 5px;
  font-weight: 500;
}

.modal-box .form-group input,
.modal-box .form-group select {
  width: 100%;
  padding: 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
}

.modal-box .modal-actions {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
  margin-top: 20px;
}

/* ========== 视图切换 ========== */
#viewMode {
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--card-bg);
  font-size: 14px;
  cursor: pointer;
}

/* ========== 记录项复选框 ========== */
.record-item .select-checkbox {
  margin-right: 10px;
}

.record-item.selected {
  background: rgba(67, 97, 238, 0.1);
  border-color: var(--primary);
}


/* ========== 网格视图样式 ========== */
.grid-view {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 15px;
  padding: 15px 0;
}

.grid-item {
  background: var(--card-bg);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  transition: transform 0.2s, box-shadow 0.2s;
  position: relative;
  border: 1px solid var(--border);
}

.grid-item:hover {
  transform: translateY(-3px);
  box-shadow: 0 4px 15px rgba(0,0,0,0.15);
}

.grid-item .select-checkbox {
  position: absolute;
  top: 8px;
  left: 8px;
  z-index: 10;
  width: 18px;
  height: 18px;
  cursor: pointer;
}

.grid-item.selected {
  outline: 3px solid var(--primary);
}

.grid-preview {
  width: 100%;
  height: 140px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--light-gray);
  cursor: pointer;
  overflow: hidden;
}

.grid-preview img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.grid-preview .video-placeholder,
.grid-preview .file-placeholder {
  font-size: 48px;
  color: var(--gray);
}

.grid-info {
  padding: 10px;
}

.grid-name {
  font-size: 13px;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-bottom: 8px;
}

.grid-actions {
  display: flex;
  gap: 5px;
}

.grid-actions button {
  flex: 1;
  padding: 5px;
  border: none;
  background: var(--bg);
  border-radius: 6px;
  cursor: pointer;
  font-size: 14px;
  transition: background 0.2s;
}

.grid-actions button:hover {
  background: var(--primary);
  color: white;
}

.grid-actions button.btn-danger:hover {
  background: var(--danger);
}

/* ========== 列表视图增强样式 ========== */
.record-item {
  display: flex;
  align-items: center;
  gap: 15px;
}

.record-item .record-select {
  flex-shrink: 0;
}

.record-item .select-checkbox {
  width: 18px;
  height: 18px;
  cursor: pointer;
}

.record-item .record-content {
  flex: 1;
  min-width: 0;
}

.record-item .record-content .record-name {
  margin-bottom: 5px;
}

.record-item .record-content .record-meta {
  font-size: 13px;
  color: #888;
}

.record-item .record-actions {
  display: flex;
  gap: 8px;
  flex-shrink: 0;
}

.record-item .record-actions button {
  padding: 6px 12px;
  font-size: 13px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--card-bg);
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
}

.record-item .record-actions button:hover {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}

.record-item .record-actions button.btn-danger:hover {
  background: var(--danger);
  border-color: var(--danger);
}

.record-item.selected {
  background: rgba(67, 97, 238, 0.1);
  border-color: var(--primary);
}

/* ========== 文件工具栏样式 ========== */
.files-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 0;
  margin-bottom: 15px;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
  gap: 10px;
}

.toolbar-left,
.toolbar-right {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.btn-small {
  padding: 6px 12px;
  font-size: 13px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--card-bg);
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
}

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

.btn-small.btn-danger:hover {
  background: var(--danger);
  border-color: var(--danger);
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 13px;
  cursor: pointer;
}

/* ========== 文件夹列表样式 ========== */
.folder-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 15px 0;
  border-bottom: 1px solid var(--border);
  margin-bottom: 15px;
}

.folder-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 15px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.2s;
  min-width: 150px;
}

.folder-item:hover {
  border-color: var(--primary);
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

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

.folder-icon {
  font-size: 24px;
}

.folder-info {
  flex: 1;
  min-width: 0;
}

.folder-name {
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.folder-count {
  font-size: 12px;
  opacity: 0.7;
}

.folder-actions {
  display: flex;
  gap: 5px;
}

.folder-actions button {
  padding: 3px 6px;
  border: none;
  background: transparent;
  cursor: pointer;
  border-radius: 4px;
  font-size: 14px;
}

.folder-actions button:hover {
  background: rgba(0,0,0,0.1);
}

/* ========== 模态框样式 ========== */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0,0,0,0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal-box {
  background: var(--card-bg);
  padding: 25px;
  border-radius: 15px;
  min-width: 350px;
  max-width: 500px;
  box-shadow: 0 10px 40px rgba(0,0,0,0.2);
}

.modal-box h3 {
  margin: 0 0 20px 0;
  font-size: 18px;
}

.modal-box .form-group {
  margin-bottom: 15px;
}

.modal-box .form-group label {
  display: block;
  margin-bottom: 5px;
  font-weight: 500;
  font-size: 14px;
}

.modal-box .form-group input,
.modal-box .form-group select {
  width: 100%;
  padding: 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  box-sizing: border-box;
}

.modal-box .form-group input[type="color"] {
  height: 40px;
  padding: 5px;
  cursor: pointer;
}

.modal-actions {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
  margin-top: 20px;
}

.modal-actions button {
  padding: 10px 20px;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  font-size: 14px;
  transition: all 0.2s;
}

.modal-actions button:first-child {
  background: var(--bg);
  border: 1px solid var(--border);
}

.modal-actions button:last-child {
  background: var(--primary);
  color: white;
}

.modal-actions button:hover {
  opacity: 0.9;
}

/* ========== 空状态样式 ========== */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--gray);
  font-size: 16px;
}

/* ========== 回收站和分享列表样式 ========== */
.trash-item,
.share-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 15px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  margin-bottom: 10px;
}

.trash-item:hover,
.share-item:hover {
  border-color: var(--primary);
}

.record-info {
  flex: 1;
  min-width: 0;
}

.record-info .record-name {
  font-weight: 500;
  margin-bottom: 5px;
}

.record-info .record-meta {
  font-size: 13px;
  color: var(--gray);
}

.expires-info {
  color: var(--warning);
}

.share-link {
  font-family: monospace;
  font-size: 12px;
  background: var(--bg);
  padding: 5px 10px;
  border-radius: 5px;
  margin-top: 5px;
  word-break: break-all;
}

.share-stats {
  display: flex;
  gap: 15px;
  margin-top: 8px;
  font-size: 12px;
  color: var(--gray);
}

/* ========== 响应式优化 ========== */
@media (max-width: 768px) {
  .files-toolbar {
    flex-direction: column;
    align-items: stretch;
  }
  
  .toolbar-left,
  .toolbar-right {
    justify-content: center;
  }
  
  .grid-view {
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  }
  
  .folder-list {
    flex-direction: column;
  }
  
  .folder-item {
    min-width: auto;
  }
  
  .record-item {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .record-item .record-actions {
    width: 100%;
    justify-content: flex-start;
    flex-wrap: wrap;
  }
  
  .trash-item,
  .share-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }
}

/* 文件类型筛选下拉框 */
#fileTypeFilter {
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--card-bg);
  font-size: 14px;
  cursor: pointer;
  color: var(--text);
}

#fileTypeFilter:focus {
  outline: none;
  border-color: var(--primary);
}

/* 分享列表样式 */
.shares-list {
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.share-item {
  background: white;
  border: 1px solid #e2e8f0;
  border-radius: 12px;
  padding: 20px;
  transition: all 0.2s ease;
}

.share-item:hover {
  border-color: #667eea;
  box-shadow: 0 4px 12px rgba(102, 126, 234, 0.15);
}

.share-item.expired {
  opacity: 0.7;
  background: #f8fafc;
}

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

.share-header strong {
  font-size: 16px;
  color: #1e293b;
}

.share-url {
  display: flex;
  gap: 10px;
  margin-bottom: 12px;
}

.share-url input {
  flex: 1;
  padding: 10px 15px;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  background: #f8fafc;
  font-size: 14px;
  color: #64748b;
}

.share-url input:focus {
  outline: none;
  border-color: #667eea;
}

.share-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 15px;
  margin-bottom: 15px;
  font-size: 14px;
  color: #64748b;
}

.share-stats span {
  display: flex;
  align-items: center;
  gap: 5px;
}

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

.btn-small {
  padding: 8px 15px;
  border: none;
  border-radius: 6px;
  font-size: 13px;
  cursor: pointer;
  background: #f1f5f9;
  color: #475569;
  transition: all 0.2s ease;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.btn-small:hover {
  background: #e2e8f0;
}

.btn-small.btn-danger {
  background: #fee2e2;
  color: #dc2626;
}

.btn-small.btn-danger:hover {
  background: #fecaca;
}

.badge {
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 500;
}

.badge-success {
  background: #dcfce7;
  color: #16a34a;
}

.badge-danger {
  background: #fee2e2;
  color: #dc2626;
}

.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: #94a3b8;
  font-size: 16px;
  line-height: 1.8;
}

.empty-state small {
  display: block;
  margin-top: 10px;
  font-size: 14px;
  color: #cbd5e1;
}

/* ========== 统一圆角样式优化 ========== */

/* 大容器 - 使用大圆角 */
.sidebar,
.main-content,
.modal-content > div,
.panel {
  border-radius: var(--radius-xl) !important;
}

/* 中等容器 - 使用中圆角 */
.upload-area,
.quota-display,
.record-card,
.grid-item,
.folder-item,
.setting-item,
.toolbar,
.file-list-header,
.breadcrumb,
.user-info-card,
.stats-card,
.quota-detail {
  border-radius: var(--radius-lg) !important;
}

/* 小元素 - 使用小圆角 */
.btn,
.btn-primary,
.btn-secondary,
.btn-danger,
.btn-outline,
.btn-sm,
button,
input,
select,
textarea,
.search-input,
.tag,
.badge,
.quota-bar,
.quota-fill,
.progress-bar,
.progress-fill,
.nav-links a,
.file-icon,
.folder-icon {
  border-radius: var(--radius-sm) !important;
}

/* 头像保持圆形 */
.avatar,
.user-avatar {
  border-radius: 50% !important;
}

/* 图片预览 */
.preview-image,
.thumbnail,
.grid-item img,
.file-thumbnail {
  border-radius: var(--radius-md) !important;
}

/* 下拉菜单和弹出层 */
.dropdown-menu,
.context-menu,
.tooltip,
.popover {
  border-radius: var(--radius-md) !important;
}

/* 表格 */
table,
.data-table {
  border-radius: var(--radius-md) !important;
  overflow: hidden;
}

.data-table th:first-child {
  border-top-left-radius: var(--radius-md);
}

.data-table th:last-child {
  border-top-right-radius: var(--radius-md);
}

.data-table tr:last-child td:first-child {
  border-bottom-left-radius: var(--radius-md);
}

.data-table tr:last-child td:last-child {
  border-bottom-right-radius: var(--radius-md);
}

/* 卡片悬停效果增强 */
.grid-item,
.record-card,
.folder-item,
.setting-item {
  transition: var(--transition), transform 0.2s ease, box-shadow 0.2s ease !important;
}

.grid-item:hover,
.record-card:hover,
.folder-item:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.12) !important;
}

/* 按钮样式统一 */
button,
.btn {
  padding: 10px 20px;
  font-weight: 500;
  transition: var(--transition) !important;
}

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

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

/* 输入框样式统一 */
input,
select,
textarea {
  padding: 12px 16px;
  border: 2px solid var(--border);
  transition: var(--transition) !important;
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(67, 97, 238, 0.1);
  outline: none;
}

/* 配额进度条圆角 */
.quota-bar,
.quota-fill,
.quota-bar-large,
.quota-fill-large {
  border-radius: 100px !important;
}

/* 标签和徽章 */
.tag,
.badge,
.label {
  border-radius: 100px !important;
  padding: 4px 12px;
}

/* 导航链接 */
.nav-links a {
  border-radius: var(--radius-sm) !important;
  margin-bottom: 4px;
}

/* Toast 提示 */
.toast,
.notification {
  border-radius: var(--radius-md) !important;
}

/* 文件操作按钮 */
.file-actions button,
.grid-item .actions button,
.record-card .actions button {
  border-radius: var(--radius-xs) !important;
  padding: 6px 12px;
}

/* 搜索框 */
.search-input,
.search-box input {
  border-radius: 100px !important;
  padding-left: 20px;
  padding-right: 20px;
}

/* 上传区域虚线边框 */
.upload-area {
  border: 2px dashed var(--border) !important;
}

.upload-area:hover {
  border-color: var(--primary) !important;
}

/* 面包屑 */
.breadcrumb {
  border-radius: var(--radius-sm) !important;
}

/* 分页 */
.pagination button,
.pagination a {
  border-radius: var(--radius-xs) !important;
}

/* 开关按钮 */
.switch,
.toggle {
  border-radius: 100px !important;
}

/* 头部 */
header {
  border-radius: 0 0 var(--radius-xl) var(--radius-xl) !important;
}

/* 视频和音频播放器 */
video,
audio {
  border-radius: var(--radius-md) !important;
}

/* 代码块 */
pre,
code {
  border-radius: var(--radius-sm) !important;
}

/* 滚动条美化 */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--light-gray);
  border-radius: 100px;
}

::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 100px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--gray);
}

/* 选择框美化 */
::selection {
  background: var(--primary);
  color: white;
}