/* 基础样式重置 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  background-color: #f5f5f5;
  color: #333;
  line-height: 1.5;
  max-width: 430px;
  margin: 0 auto;
  min-height: 100vh;
}

/* 变量定义 */
:root {
  --primary-color: #FF6B35;
  --primary-light: #FFF5F0;
  --text-primary: #333333;
  --text-secondary: #666666;
  --text-tertiary: #999999;
  --border-color: #EEEEEE;
  --bg-primary: #FFFFFF;
  --bg-secondary: #F5F5F5;
  --bg-category: #F8F8F8;
  --price-color: #FF4D4F;
}

/* 通用样式 */
.container {
  padding: 12px;
}

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

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

.text-price {
  color: var(--price-color);
}

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

.text-tertiary {
  color: var(--text-tertiary);
}

.font-bold {
  font-weight: 600;
}

.font-12 {
  font-size: 12px;
}

.font-14 {
  font-size: 14px;
}

.font-16 {
  font-size: 16px;
}

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

.font-20 {
  font-size: 20px;
}

/* 按钮样式 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  border-radius: 20px;
  border: none;
  font-size: 14px;
  cursor: pointer;
  transition: all 0.3s;
}

.btn-primary {
  background: var(--primary-color);
  color: #fff;
}

.btn-primary:active {
  opacity: 0.8;
}

.btn-outline {
  background: #fff;
  color: var(--primary-color);
  border: 1px solid var(--primary-color);
}

.btn-block {
  width: 100%;
  height: 44px;
  border-radius: 22px;
}

.btn-disabled {
  background: #ccc;
  color: #fff;
}

/* 输入框样式 */
.input {
  width: 100%;
  height: 44px;
  padding: 0 16px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  font-size: 14px;
  outline: none;
  transition: border-color 0.3s;
}

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

/* 卡片样式 */
.card {
  background: #fff;
  border-radius: 12px;
  padding: 16px;
  margin-bottom: 12px;
}

/* 底部导航 */
.tab-bar {
  position: fixed;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 430px;
  height: 56px;
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: space-around;
  border-top: 1px solid var(--border-color);
  z-index: 100;
}

.tab-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  flex: 1;
  height: 100%;
  color: var(--text-tertiary);
  text-decoration: none;
  font-size: 10px;
}

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

.tab-item .icon {
  width: 24px;
  height: 24px;
  margin-bottom: 2px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.tab-item .icon svg {
  width: 20px;
  height: 20px;
}

/* 页面内容区域（留出底部导航空间） */
.page-content {
  padding-bottom: 70px;
  min-height: 100vh;
}

/* 加载状态 */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  color: var(--text-tertiary);
  font-size: 14px;
}

/* 空状态 */
.empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 60px 20px;
  color: var(--text-tertiary);
}

.empty-icon {
  width: 80px;
  height: 80px;
  margin-bottom: 16px;
  opacity: 0.5;
}

/* Toast提示 */
.toast {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: rgba(0, 0, 0, 0.7);
  color: #fff;
  padding: 12px 24px;
  border-radius: 8px;
  font-size: 14px;
  z-index: 1000;
  display: none;
}

.toast.show {
  display: block;
}

/* 返回按钮 */
.back-btn {
  position: fixed;
  top: 12px;
  left: 12px;
  width: 36px;
  height: 36px;
  background: rgba(0, 0, 0, 0.3);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  z-index: 100;
  cursor: pointer;
}

/* 安全区域适配 */
@supports (padding-bottom: env(safe-area-inset-bottom)) {
  .tab-bar {
    padding-bottom: env(safe-area-inset-bottom);
    height: calc(56px + env(safe-area-inset-bottom));
  }
  
  .page-content {
    padding-bottom: calc(70px + env(safe-area-inset-bottom));
  }
}