当前，标签位于边框之外。
如何使单词“from：”位于下拉框的顶部，并且当值被选中时它仍然存在？
样本输出：出发地：选项2

<div class="custom-select">
        <label for="dropdown">from: </label>
        <select >
            <option value="" disabled selected>From:</option>
   
            <option value="option1">Option 1</option>
            <option value="option2">Option 2</option>
            <option value="option3">Option 3</option>
          </select>
        
    </div>

.custom-select {
  position: relative;
  display: inline-block;
  width: 100%;
  font-size: 16px;
  overflow: hidden; 
}

.custom-select select {
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  padding: 8px 30px 8px 16px; 
  border: 1px solid #ccc;
  background-color: white;
  width: 100%;
  cursor: pointer;
   background-repeat: no-repeat;
  background-position: right center;
}

.custom-select select::-ms-expand {
  display: none;
}

.custom-select select:focus {
  outline: none;
}

.select-label {
  position: absolute;
  top: 50%;
  right: 10px;
  transform: translateY(-50%);
  font-weight: bold;
  color: #555;
}