body {
    font-family: Arial, sans-serif;
    background-color: #f6f6f6;
    color: #333;
  }
  h1{
    margin-top: 0;
    padding-top: 10px;  
}
  
  h1, h3 {
    text-align: center;
    color: #444;
  }
  
  form {
    display: flex;
    flex-direction: column;
    gap: 12px;
    max-width: 600px;
    margin: 20px auto;
  }
  
  form input[type="text"],
  form input[type="email"],
  form input[type="tel"],
  form textarea {
    padding: 10px;
    font-size: 16px;
    border: 1px solid #ccc;
    border-radius: 5px;
  }
  
  form textarea {
    resize: vertical;
  }
  
  form button {
    padding: 12px;
    font-size: 16px;
    background-color: #28a745;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: background-color 0.2s ease-in-out;
  }
  
  form button:hover {
    background-color: #218838;
  }
  
  /* 日历容器 */
  #calendar {
    max-width: 800px;
    margin: 20px auto 0 auto;
    background-color: white;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
  }
  
  /* 时间选择器容器 */
  #time-picker {
    max-width: 800px;
    margin: 20px auto 0 auto;
    padding: 20px;
    background: #ffffff;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.08);
  }
  
  /* 时间段按钮基础样式 */
  .time-slot {
    display: inline-block;
    margin: 5px;
    padding: 10px 15px;
    background-color: #eee;
    border-radius: 5px;
    cursor: pointer;
    font-weight: bold;
    transition: all 0.2s ease;
  }
  
  .time-slot:hover {
    background-color: #ccc;
  }
  
  /* 可预约，绿色 */
  .time-slot.available {
    background-color: #d4edda;
    color: #155724;
  }
  
  /* 已预约，红色，不可点击 */
  .time-slot.booked {
    background-color: #f8d7da;
    color: #721c24;
    cursor: not-allowed;
  }
  
  /* 已选中，高亮蓝色 */
  .time-slot.selected,
  .time-slot.available.selected {
    background-color: #007bff !important;
    color: white !important;
  }
  
  /* 自定义提示文字 */
  #time-picker p {
    text-align: center;
    font-style: italic;
    color: #888;
  }

  .fc-day.fc-weekend {
    background-color: #ffecec;
  }

  .fc-day.fc-weekday {
    background-color: #e9ffe9;
  }

  .fc-day.fc-fully-booked {
    background-color: #ffb3b3 !important;
    font-weight: bold;
    color: #a00;
  }

  /* 今日日期的加粗边框 */
  .fc-day-today {
    background-color: inherit !important;  /* 不要黄色背景 */
    border: 2px solid #000 !important;     /* 保留黑色边框 */
    box-sizing: border-box;
  }

  /* 今天 + 周末 */
.fc-day.fc-day-today.fc-weekend {
    background-color: #ffecec !important;
    border: 2px solid #000 !important;
  }
  
  /* 今天 + 满了 */
  .fc-day.fc-day-today.fc-fully-booked {
    background-color: #ffb3b3 !important;
    border: 2px solid #000 !important;
    color: #a00;
  }
  
  /* 今天 + 普通工作日 */
  .fc-day.fc-day-today.fc-weekday {
    background-color: #e9ffe9 !important;
    border: 2px solid #000 !important;
  }

.popup-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.5);
  z-index: 9999;
}

.popup-content {
  background: white;
  padding: 30px;
  max-width: 400px;
  margin: 100px auto;
  border-radius: 8px;
  text-align: center;
}

.popup-content button {
  margin-top: 20px;
  padding: 8px 16px;
  background-color: #2196F3;
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}