input

input默认样式和focus样式

参考element-ui的css，可以实现如下效果

实现代码

<style>
   /* 去除默认样式 */
   input {
     border: none;
     outline: none;
     padding: 0;
     margin: 0;
     -webkit-appearance: none;
     -moz-appearance: none;
     appearance: none;
     background-image: none;
     background-color: transparent;
     font-size: inherit;
   }

   input:focus {
     outline: none;
   }

   /* 自定义样式 */
   .mo-input {
     color: #606266;
     background-color: #fff;
     border-radius: 4px;
     border: 1px solid #dcdfe6;

     box-sizing: border-box;
     display: inline-block;
     transition: border-color 0.2s cubic-bezier(0.645, 0.045, 0.355, 1);

     width: 180px;
     height: 40px;
     line-height: 40px;
     padding: 0 15px;
   }

   /* 提示文字 */
   .mo-input::placeholder {
     color: #c0c4cc;
   }

   /* 鼠标hover */
   .mo-input:hover {
     border-color: #c0c4cc;
   }

   /* 获得焦点 */
   .mo-input:focus {
     border-color: #3677f0;
   }
 </style>

 <input
   type="text"
   class="mo-input"
 />

 <input
   type="text"
   class="mo-input"
 />

textarea

textarea默认样式和focus样式

同样参考element-ui的css，可以实现如下效果

<style>
 /* 去除默认样式 */
  textarea {
    border: none;
    outline: none;
    padding: 0;
    margin: 0;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    background-image: none;
    background-color: transparent;
    font-size: inherit;
    width: 100%;
  }

  textarea:focus {
    outline: none;
  }

  /* 自定义样式 */
  .mo-textarea {
    display: inline-block;
    resize: vertical;
    padding: 5px 15px;
    line-height: 1.5;
    box-sizing: border-box;
    color: #606266;
    background-color: #fff;
    border: 1px solid #dcdfe6;
    border-radius: 4px;
    transition: border-color 0.2s cubic-bezier(0.645, 0.045, 0.355, 1);
  }

  /* 提示文字 */
  .mo-textarea::placeholder {
    color: #c0c4cc;
  }

  /* 鼠标hover */
  .mo-textarea:hover {
    border-color: #c0c4cc;
  }

  /* 获得焦点 */
  .mo-textarea:focus {
    border-color: #3677f0;
  }
</style>

<textarea
  class="mo-textarea"
  placeholder="请输入内容"
></textarea>

<textarea
  class="mo-textarea"
  placeholder="请输入内容"
></textarea>