* {
    padding: 0;
    margin: 0;
    font-family: Microsoft YaHei, "微软雅黑";
}

html,
body {
    width: 100%;
    height: 100%;
}

#app {
    position: relative;
    max-width: 700px;
    min-height: 100vh;
    height: 100%;
    left: 50%;
    transform: translateX(-50%);
}

#title {
    background: green;
    height: 20vh;
}

#title1 {
    margin-top: 5vh;
    text-align: center;
}

.ra {
    border-radius: 25px;
}

#license {
    /* height: 20vh; */
    border: 2px solid red;
    margin: 2vh 2vh 0 2vh;
    padding: 1vh 3vh 1vh 3vh;
}