要实现这些修改，请尝试使用以下样式：

/* Reduce the height of the input field */
.MuiOutlinedInput-input {
  padding-top: 10px; /* Adjust as needed */
  padding-bottom: 10px; /* Adjust as needed */
}

/* Adjust the spacing between the close date and calendar icons */
.MuiPickersDay-dayButtonStart {
  margin-left: 8px; /* Adjust as needed */
}

/* Modify the oval-shaped background */
.MuiPickersStaticWrapper-root {
  width: 200px; /* Adjust the width as needed */
  height: 200px; /* Adjust the height as needed */
  border-radius: 100px; /* To make it perfectly oval, set the border-radius to half of the width/height */
}

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