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

/* 移动端优化 */
html {
  /* 防止iOS Safari缩放 */
  -webkit-text-size-adjust: 100%;
  /* 防止横屏时字体缩放 */
  text-size-adjust: 100%;
  /* 平滑滚动 */
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  background-color: #f5f5f5;
  line-height: 1.4;
  /* 支持安全区域 */
  padding-top: env(safe-area-inset-top);
  padding-bottom: env(safe-area-inset-bottom);
  padding-left: env(safe-area-inset-left);
  padding-right: env(safe-area-inset-right);
  /* 移动端触摸优化 */
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  user-select: none;
  /* 防止橡皮筋效果 */
  overscroll-behavior: contain;
}
/* 主容器 */
.coupon-center-container {
  min-height: 100vh;
  background: #f5f5f5;
  /* 适配移动端安全区域 */
  min-height: calc(100vh - env(safe-area-inset-top) - env(safe-area-inset-bottom));
  padding-bottom: max(20px, env(safe-area-inset-bottom));
  /* 为固定标题栏留出空间 */
  padding-top: calc(44px + env(safe-area-inset-top));
}

/* 页面头部 */
.page-header {
  background: #ffffff;
  padding: 0;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  border-bottom: 1px solid #f0f0f0;
  /* 状态栏高度适配 - 模拟微信小程序标准导航栏位置 */
  padding-top: env(safe-area-inset-top);
  height: calc(44px + env(safe-area-inset-top));
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 16px;
  height: 44px;
  margin-top: 0;
  position: relative;
}

.header-back {
  width: 28px;
  height: 28px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: background-color 0.2s ease;
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
}

.header-back:hover {
  background-color: #f5f5f5;
}

.header-back svg {
  width: 18px;
  height: 18px;
}

.header-back svg path {
  stroke: #333333;
}

.header-title {
  font-size: 17px;
  font-weight: 600;
  color: #333333;
  text-align: center;
  line-height: 1.2;
}

.header-placeholder {
  width: 28px;
  height: 28px;
}

/* 优惠券列表容器 */
.coupon-list-container {
  padding: 12px;
  /* 适配移动端安全区域 */
  padding-left: max(12px, env(safe-area-inset-left));
  padding-right: max(12px, env(safe-area-inset-right));
  padding-bottom: max(20px, env(safe-area-inset-bottom));
}

/* 优惠券项 */
.coupon-item {
  margin-bottom: 12px;
}

.coupon-card {
  background: #fff;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
  position: relative;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.coupon-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.12);
}

/* 优惠券主体 */
.coupon-main {
  display: flex;
  padding: 16px;
  position: relative;
}

.coupon-main::after {
  content: '';
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 1px;
  height: 30px;
  background: linear-gradient(to bottom, transparent, #e5e5e5, transparent);
}

.coupon-left {
  flex: 0 0 100px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #ff6b6b, #ff8e8e);
  color: #fff;
  border-radius: 6px;
  padding: 12px 8px;
  margin-right: 16px;
  min-height: 80px;
}

.coupon-value {
  display: flex;
  align-items: baseline;
  margin-bottom: 4px;
}

.value-number {
  font-size: 28px;
  font-weight: 700;
  line-height: 1;
}

.value-unit {
  font-size: 12px;
  font-weight: 500;
  margin-left: 2px;
}

.value-text {
  font-size: 18px;
  font-weight: 700;
}

.coupon-desc {
  font-size: 11px;
  opacity: 0.9;
  text-align: center;
  line-height: 1.2;
}

.coupon-right {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-left: 8px;
}

.coupon-name {
  font-size: 16px;
  font-weight: 600;
  color: #333;
  margin-bottom: 6px;
  line-height: 1.3;
}

.coupon-time {
  font-size: 12px;
  color: #999;
  margin-bottom: 4px;
}

.coupon-stock {
  font-size: 12px;
  color: #ff6b6b;
  font-weight: 500;
}

/* 领取按钮区域 */
.coupon-action {
  padding: 12px 16px;
  background: #f8f9fa;
  border-top: 1px solid #eee;
}

.receive-btn {
  width: 100%;
  height: 40px;
  background: linear-gradient(135deg, #ff6b6b, #ff8e8e);
  color: #fff;
  border: none;
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
}

.receive-btn:hover {
  background: linear-gradient(135deg, #ff5252, #ff7979);
  transform: translateY(-1px);
}

.receive-btn.disabled {
  background: #ccc;
  color: #999;
  cursor: not-allowed;
}

.receive-btn.disabled:hover {
  transform: none;
  background: #ccc;
}

.receive-btn:not(.disabled):active {
  transform: scale(0.98);
  opacity: 0.8;
}

/* 加载状态 */
.loading-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 60px 16px;
  text-align: center;
}

.loading-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid #f3f3f3;
  border-top: 3px solid #ff6b6b;
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-bottom: 16px;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.loading-text {
  font-size: 16px;
  color: #666;
}

/* 空状态 */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 60px 16px;
  text-align: center;
}

.empty-icon {
  font-size: 60px;
  margin-bottom: 16px;
  opacity: 0.6;
}

.empty-text {
  font-size: 16px;
  color: #666;
  margin-bottom: 8px;
}

.empty-desc {
  font-size: 14px;
  color: #999;
}

/* 响应式适配 */
@media (max-width: 480px) {
  .coupon-left {
    flex: 0 0 80px;
    padding: 8px 6px;
    margin-right: 12px;
  }
  
  .value-number {
    font-size: 24px;
  }
  
  .coupon-name {
    font-size: 14px;
  }
  
  .coupon-main {
    padding: 12px;
  }
  
  .coupon-action {
    padding: 10px 12px;
  }
}

@media (max-width: 360px) {
  .header-content {
    padding: 0 12px;
  }
  
  .coupon-list-container {
    padding: 12px 8px;
  }
  
  .coupon-left {
    flex: 0 0 70px;
    padding: 6px 4px;
  }
  
  .value-number {
    font-size: 20px;
  }
  
  .coupon-desc {
    font-size: 10px;
  }
}