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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans', sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

#app {
  width: 100%;
  min-height: 100vh;
  position: relative;
}

/* 自定义滚动条 */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.3);
  border-radius: 4px;
  transition: background 0.3s ease;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.5);
}

/* 链接样式 */
a {
  color: inherit;
  text-decoration: none;
}

/* 按钮基础样式重置 */
button {
  font-family: inherit;
  border: none;
  outline: none;
  cursor: pointer;
}

/* 输入框基础样式 */
input {
  font-family: inherit;
}

/* 通用动画类 */
.fade-enter-active,
.fade-leave-active {
  transition: opacity 0.3s ease;
}

.fade-enter-from,
.fade-leave-to {
  opacity: 0;
}

.slide-up-enter-active,
.slide-up-leave-active {
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.slide-up-enter-from,
.slide-up-leave-to {
  transform: translateY(20px);
  opacity: 0;
}

/* 工具类 */
.text-gradient {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.backdrop-glass {
  backdrop-filter: blur(20px);
  background: rgba(255, 255, 255, 0.1);
}

/* 响应式栅格 */
.grid-responsive {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
}

/* 移动端优化 */
@media (max-width: 768px) {
  body {
    -webkit-text-size-adjust: 100%;
  }
  
  /* 防止 iOS 缩放 */
  input, textarea, select {
    font-size: 16px !important;
  }
}

/* 高对比度模式支持 */
@media (prefers-contrast: high) {
  .smart-card,
  .search-box,
  .tag-item {
    border-width: 2px;
  }
}

/* 减少动画模式 */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* 打印样式优化 */
@media print {
  body {
    background: white;
  }
  
  .glass-bg,
  .app-footer,
  .controls-section,
  .hero-header {
    display: none;
  }
  
  .cards-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .smart-card {
    break-inside: avoid;
    box-shadow: none;
    border: 1px solid #ddd;
  }
}

/* 选中文本样式 */
::selection {
  background: rgba(102, 126, 234, 0.3);
  color: white;
}

/* 焦点可见性 */
:focus-visible {
  outline: 2px solid #667eea;
  outline-offset: 2px;
}

/* 隐藏类 */
.hidden {
  display: none !important;
}

/* 文本截断 */
.text-ellipsis {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* 多行文本截断 */
.text-ellipsis-2 {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.text-ellipsis-3 {
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}