* {
    box-sizing: border-box;
}

img {
    vertical-align: middle;
}

body {
    background: url(../images/pc/bg.jpg?v=28) no-repeat;
    width: 100%;
    height: 100%;
    background-size: cover;
    display: flex;
    flex-direction: column;
}

header {
    width: 100%;
    display: flex;
    align-items: center;
    padding: 4vh 3vw 0;
}

header>img:first-of-type {
    height: 10vh;
    margin-right: auto;
}

header>img:nth-of-type(n+2) {
    display: flex;
    margin-right: 20px;
    cursor: pointer;
}

main {
    flex: 1;
    width: 90%;
    display: flex;
    flex-direction: row;
    justify-content: space-between;
}

.main-img {
    display: flex;
    align-items: center;
}

.main-img > img {
    width: 100%;
}

.qr-box {
    display: flex;
    flex-direction: column;
    margin: 8vh 0 0 10vw
}

.qr-box>img {
    width: 80%;
}

.qr-bg {
    margin-top: 60px;
    position: relative;
}

.qrcode {
    position: absolute;
    top: 0;
    left: 0;
    padding: 3vh 1vw;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: row;
    align-items: center;
}