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修改login.vue 的style

<template>
    <div class="login_container">
        <div class="login_box">
            <div class="avatar_box">
                <img src="../assets/logo.png">
            </div>
        </div>

    </div>
</template>

<script>
    export default {
        name: "Login"
    }
</script>

<style lang="less" scoped>  // 要支持less 的话得安装两个开发依赖：less-load 和 less
    .login_container{
        background-color: #2b4b6b;
        height: 100%;
    }
    .login_box{
        width: 450px;
        height: 300px;
        background-color: #ffffff;
        border-radius: 3px;
        position: absolute;
        left: 50%;
        top: 50%;
        transform: translate(-50%, -50%);

        .avatar_box{
            height: 130px;
            width: 130px;
            border: 1px solid #eeeeee;
            border-radius: 50%;
            padding: 10px;
            box-shadow: 0 0 10px #dddddd; // 向外扩散10像素
            position: absolute;
            left: 50%;
            transform: translate(-50%, -50%);
            background-color: #ffffff;
            img{
                width: 100%;
                height: 100%;
                border-radius: 50%;
                background-color: #eeeeee;
            }
        }
    }
</style>