.maintenance {
    position: fixed;
    z-index: 1000;
    top: 0;
    left: 0;
    width: 100vw;
    min-width: 100%;
    height: 100vh;
    background-color: #ED6D01;
}

.maintenance::before {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 343px;
    height: 400px;
    background: url("../image/maintenance/image_sp.png") no-repeat;
    background-position: center;
    background-size: contain;
}

@media screen and (min-width: 768px) {
    .maintenance::before {
        width: 600px;
        height: 484px;
        background-image: url("../image/maintenance/image_pc.png");
    }
}