:root{--primary-color: #ff4757;--bg-color: #f1f2f6;font-family:Helvetica Neue,Helvetica,PingFang SC,Hiragino Sans GB,Microsoft YaHei,微软雅黑,Arial,sans-serif}*{box-sizing:border-box}.btn{background-color:var(--primary-color);color:#fff;border:none;padding:15px 40px;font-size:24px;border-radius:50px;cursor:pointer;box-shadow:0 4px 15px #ff475766;transition:transform .1s}.btn:active{transform:scale(.95)}.full-screen{width:100vw;height:100vh;position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;background:var(--bg-color)}.fade-enter-active,.fade-leave-active{transition:opacity .3s ease}.fade-enter-from,.fade-leave-to{opacity:0}