* {
    margin: 0px;
    padding: 0px;
    box-sizing: border-box;
}

html {
    width: 100%;
    height: 100%;
    overflow: hidden;
    font-size: 1.2vh;
}

body {
    width: 100%;
    height: 100%;
    font-size: 1.2vh;
    position: fixed;
    left: 0;
    top: 0;
}

@media screen and (orientation:portrait) {

    /*竖屏样式*/
    body {
        transform-origin: 0 0;
        transform: rotateZ(90deg) translateY(-100%);
        font-size: 0.5vh;
    }
}

.main {
    width: 100%;
    height: 100%;
    margin: 0 auto;
    background-image: url("../img/introduce.jpg");
    background-repeat: no-repeat;
    background-size: 100% 100%;
    position: relative;
}

.box {
    width: 6%;
    height: 10%;
    position: absolute;
    bottom: 11%;
    right: 5%;
}

.v-lit {
    position: absolute;
    width: 12%;
    height: 13%;
    left: 25.5%;
    bottom: 9.3%;
    /* border: 1px solid black; */
}

.v-video{
    width: 100%;
    height: 100%;
    display: none;
}