/* 公共样式 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

html {
  font-size: 14px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  background: #f8fafc;
  color: #1e293b;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  text-decoration: none;
  color: inherit;
}

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

button {
  border: none;
  background: none;
  cursor: pointer;
  font-family: inherit;
}

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

/* 滚动条美化 */
::-webkit-scrollbar {
  width: 4px;
  height: 4px;
}

::-webkit-scrollbar-thumb {
  background: #cbd5e1;
  border-radius: 2px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

/* 通用工具类 */
.text-center { text-align: center; }
.text-muted { color: #64748b; }
.text-muted-2 { color: #94a3b8; }
.font-bold { font-weight: 600; }

.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.flex-wrap { flex-wrap: wrap; }

.mt-8 { margin-top: 8px; }
.mt-12 { margin-top: 12px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mb-8 { margin-bottom: 8px; }
.mb-12 { margin-bottom: 12px; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }

/* 安全区域 */
.safe-bottom {
  padding-bottom: env(safe-area-inset-bottom);
}

.safe-top {
  padding-top: env(safe-area-inset-top);
}

/* 渐变背景 */
.gradient-primary {
  background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
}

.gradient-success {
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
}

.gradient-warning {
  background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
}

/* 卡片样式 */
.card {
  background: #fff;
  border-radius: 16px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

/* 按钮样式 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  border-radius: 12px;
  font-size: 14px;
  font-weight: 500;
  transition: all 0.2s;
}

.btn-primary {
  background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
  color: #fff;
}

.btn-primary:active {
  opacity: 0.9;
}

.btn-secondary {
  background: #f1f5f9;
  color: #64748b;
}

.btn-block {
  width: 100%;
}

/* 圆角 */
.rounded-8 { border-radius: 8px; }
.rounded-12 { border-radius: 12px; }
.rounded-16 { border-radius: 16px; }
.rounded-20 { border-radius: 20px; }

/* 阴影 */
.shadow-sm { box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05); }
.shadow-md { box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08); }

/* 底部 TabBar（模拟小程序自定义 tabBar） */
.h5-tabbar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-top: 1px solid rgba(0, 0, 0, 0.05);
  display: flex;
  justify-content: space-around;
  padding: 8px 0 calc(8px + env(safe-area-inset-bottom));
  z-index: 1000;
  box-shadow: 0 -2px 12px rgba(0, 0, 0, 0.06);
}
.h5-tabbar-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 4px 14px;
  cursor: pointer;
  transition: color 0.2s;
  color: #64748b;
}
.h5-tabbar-item.active { color: #6366f1; }
.h5-tabbar-icon {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 2px;
}
.h5-tabbar-icon svg { width: 100%; height: 100%; fill: currentColor; }
.h5-tabbar-text { font-size: 10px; font-weight: 500; }