* {
    box-sizing: border-box;
}

img {
    vertical-align: middle;
}

body {
    width: 100vw;
    height: 100vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    min-width: 1300px;
    background: url(../img/pc/bg.jpg?v=10) no-repeat;
    background-size: 100% 100%;
}

header {
    position: absolute;
    z-index: 10;
    width: 100vw;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 3vh 2vw 0;
}

header>img:first-of-type {
    height: 8vh;
    margin-right: auto;
}

header>img:nth-of-type(n+2) {
    width: 8%;
    display: flex;
    margin-left: 10px;
    cursor: pointer;
}

header>img:nth-of-type(3) {
    width: 8%;
}

main {
    margin: auto;
    width: 100%;
    height: 100%;
    position: relative;
    display: flex;
    justify-content: center;
}

main > img {
    position: absolute;
    bottom: 4vh;
}

.install-container {
    position: absolute;
    left: 3vw;
    bottom: 5vh;
    z-index: 10;
}

.install-container > img {
    width: 80%;
}

.qr-container {
    position: absolute;
    right: 6vw;
    bottom: 5vh;
    z-index: 10;
}

.qr-container > img {
    position: relative;
}

.qrcode {
    position: absolute;
    top: 0;
    height: 85%;
    display: flex;
    justify-content: center;
    align-items: center;
    
}

.qrcode > img {
    width: 70%;
}