App.vue

<template>
    <div id="app">
        <router-view></router-view>
    </div>
</template>
<style lang="less">
html, body, #app, .el-container {
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
}


::-webkit-scrollbar {
    width: 9px;
}

::-webkit-scrollbar-thumb {
    background-color: #dddddd;
    background-clip: padding-box;
    border-radius: 2em;
    -webkit-border-radius: 2em;
    -moz-border-radius: 2em;
}

::-webkit-scrollbar-thumb:hover {
    background-color: #bbb;
}

.flex-vertical-center {
    display: flex;
    align-items: center;
}

.flex-horizontal-center {
    display: flex;
    justify-content: center;
}

</style>