body * {
    box-sizing: content-box;
    flex-shrink: 0;
  }
  body {
    font-family: PingFangSC-Regular, Roboto, Helvetica Neue, Helvetica, Tahoma,
      Arial, PingFang SC-Light, Microsoft YaHei;
  }
  input {
    background-color: transparent;
    border: 0;
  }
  button {
    margin: 0;
    padding: 0;
    border: 1px solid transparent;
    outline: none;
    background-color: transparent;
  }
  
  button:active {
    opacity: 0.6;
  }
  .flex-col {
    display: flex;
    flex-direction: column;
  }
  .flex-row {
    display: flex;
    flex-direction: row;
  }
  .justify-start {
    display: flex;
    justify-content: flex-start;
  }
  .justify-center {
    display: flex;
    justify-content: center;
  }
  
  .justify-end {
    display: flex;
    justify-content: flex-end;
  }
  .justify-evenly {
    display: flex;
    justify-content: space-evenly;
  }
  .justify-around {
    display: flex;
    justify-content: space-around;
  }
  .justify-between {
    display: flex;
    justify-content: space-between;
  }
  .align-start {
    display: flex;
    align-items: flex-start;
  }
  .align-center {
    display: flex;
    align-items: center;
  }
  .align-end {
    display: flex;
    align-items: flex-end;
  }
  .tt {
    font-size: 14px;
  }
  .tt p {
    margin: 0px;
  }
  .tt .nav {
    width: 100%;
  }
  .page-number {
    display: flex;
    justify-content: center;
  }
  .page-number .pagination {
    display: flex;
    list-style: none;
    font-size: 14px;
  }
  .page-number .pagination a {
    border: 1px solid #ddd;
    background-color: #fff;
    position: relative;
    float: left;
    padding: 6px 12px;
    margin-left: -1px;
    line-height: 1.42857143;
    color: #337ab7;
    text-decoration: none;
  }
  .page-number .pagination a span {
    color: #333333; 
  }
  .page-number .pagination .active a {
    color: #fff;
    background-color: #49a7ff;
    border-color: #49a7ff;
  }
  .page-number .pagination li:first-child a {
    margin-left: 0;
    border-top-left-radius: 4px;
    border-bottom-left-radius: 4px;
  }
  .page-number .pagination li:last-child a {
    border-top-right-radius: 4px;
    border-bottom-right-radius: 4px;
  }
  .content .link {
    font-size: 18px;
    font-family: Source Han Sans CN;
    font-weight: 500;
    color: #999999;
    margin-top: 25px;
  }
  .content .link a {
    font-size: 18px;
    font-family: Source Han Sans CN;
    font-weight: 500;
    color: #999999;
    margin-top: 25px;
  }