html{
    font-size:16px;
    font-family: "Helvetica Neue", Helvetica, Arial, "PingFang SC", "Hiragino Sans GB", "Heiti SC", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
  }
  input,select{
    -webkit-animation: 1ms void-animation-out;
    outline: none;
    border-style: none;
    border-radius: 0;
  }
  ::placeholder {
    color: #aaa;
    opacity: 1; /* Firefox */
  }
  :-ms-input-placeholder { /* Internet Explorer 10-11 */
    color: #aaa;
  }
  ::-ms-input-placeholder { /* Microsoft Edge */
    color: #aaa;
  }
  input[type="checkbox"],input[type="radio"] {
    box-sizing: border-box;
    padding: 0;
  }
  [type=radio], [type=checkbox] {
    opacity: 0;
    width: 0;
    position: absolute;
    display: inline-block; 
  }
  [type=radio] + .checkable:hover:before, [type=checkbox] + .checkable:hover:before, :focus[type=radio] + .checkable:before, :focus[type=checkbox] + .checkable:before {
    border: 1px solid #0074d9; 
  }
  [type=radio] + .checkable, [type=checkbox] + .checkable {
    position: relative;
    cursor: pointer;
    padding-left: 1.5em;
    margin-right: .6em;
  }
  [type=radio] + .checkable:before, [type=checkbox] + .checkable:before, [type=radio] + .checkable:after, [type=checkbox] + .checkable:after {
    content: '';
    position: absolute;
    display: inline-block;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1em;
    line-height: 1em;
    color: transparent;
    font-family: sans;
    text-align: center;
    box-sizing: border-box;
    width: 1em;
    height: 1em;
    border-radius: 50%;
    transition: all 0.3s;
  }
  [type=radio] + .checkable:before, [type=checkbox] + .checkable:before {
    border: 1px solid #aaa; 
  }
  :checked[type=radio] + .checkable:after, :checked[type=checkbox] + .checkable:after {
    background: #555;
    transform: scale(0.5) translateY(-100%);
  }
  [type=checkbox] + .checkable:before {
    border-radius: 0.2em;
  }
  [type=checkbox] + .checkable:after {
    content: "✔";
    background: none;
    transform: scale(2) translateY(-25%);
    visibility: hidden;
    opacity: 0;
  }
  :checked[type=checkbox] + .checkable:after {
    color: #111;
    background: none;
    transform: translateY(-50%);
    transition: all 0.3s;
    visibility: visible;
    opacity: 1; 
  }
  ::-webkit-scrollbar-track {
    -webkit-box-shadow: inset 0 0 6px rgba(0,0,0,0.3);
    border-radius: 10px;
    background-color: #F5F5F5;
  }
  ::-webkit-scrollbar {
    width: 10px;
    background-color: #F5F5F5;
  }
  ::-webkit-scrollbar-thumb {
    border-radius: 10px;
    background-color: #0066bb;
  }