.flex {
    display: flex;
}
body {
    margin: 0;
    -moz-osx-font-smoothing: grayscale;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
    font-family: Helvetica Neue, Helvetica, PingFang SC, Hiragino Sans GB, Microsoft YaHei, Arial,
    sans-serif;
    font-size: 14px;
}

html {
    box-sizing: border-box;
}


*,
*:before,
*:after {
    box-sizing: inherit;
    margin: 0;
    padding: 0;
}

a:focus,
a:active {
    outline: none;
}

a,
a:focus,
a:hover {
    cursor: pointer;
    color: inherit;
    text-decoration: none;
}

div:focus {
    outline: none;
}

.clearfix:after {
    visibility: hidden;
    display: block;
    font-size: 0;
    content: ' ';
    clear: both;
    height: 0;
}

ul {
    margin: 0;
    padding: 0;

}
li {
    list-style: none;
}
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    border-radius: 4px; /*滚动条的背景区域的圆角*/
    background-color: rgba(223, 219, 219, 0.1); /*滚动条的背景颜色*/
}
::-webkit-scrollbar-thumb {
    border-radius: 4px; /*滚动条的圆角*/
    background-color: rgba(144, 147, 153, 0.3); /*滚动条的背景颜色*/
}

::-webkit-scrollbar-thumb:hover {
    background-color: rgba(144, 147, 153, 0.6);
}

::-webkit-scrollbar-thumb:active {
    background-color: rgba(144, 147, 153, 0.6);
    cursor: pointer;
}