完美居中

<template>    <div>      <div class="login-page">         <div class="login-container">fuck</div>      </div>    </div></template><script></script><style> html,body{   width: 100%;   padding: 0px;   margin: 0px; }  .login-page{    top: 50%;    width: 100%;    position: absolute;    text-align: center;    -webkit-transform: translateY(-50%);    transform: translateY(-50%);  }  .login-container{    width: 50%;    margin: 0 auto;  }</style>