section#main {
    position: relative;
    padding: 0;
    height: 650px;
    margin-top: 110px;
}

.bg_img {
    background: url(../../img/png/main_bg.png);
    background-position: center;
    background-size: cover;
    height: 650px;
    position: absolute;
    top: 0;
    width: 100%;
}

.bg_img:nth-child(2) {
    background: url(../../img/png/main_bg_after.png);
    background-position: center;
    background-size: cover;
}

.bg_img:nth-child(3) {
    background: url(../../img/png/main_bg_last.png);
    background-position: center;
    background-size: cover;
}

.image {
    position: absolute;
    width: 100%;
    opacity: 0;
    animation: bgAnime 15s infinite;
    /* 3画像 × 各5s = 20s */
}

.image:nth-of-type(1) {
    animation-delay: 0s;
}

.image:nth-of-type(2) {
    animation-delay: 5s;
    ;
}

.image:nth-of-type(3) {
    animation-delay: 10s;
}

@keyframes bgAnime {
    0% {
        opacity: 0;
    }
    5% {
        opacity: 1;
    }
    45% {
        opacity: 1;
    }
    50% {
        opacity: 0;
    }
    100% {
        opacity: 0;
    }
}

@media (max-width: 1099px) {
    section#main {
        margin-top: 80px;
    }
}

.mainContent {
    width: 50%;
    position: absolute;
    top: 135px;
    z-index: 1;
}

@media (max-width: 1099px) {
    .mainContent h1 img {
        width: 100%;
        height: auto;
    }
}


/*********************************/


/*        SP Responsive          */


/*********************************/

@media (max-width: 768px) {
    section#main {
        height: 480px;
        margin-top: 0;
    }
    .mainContent {
        width: 100%;
        top: 110px;
    }
    .mainContent h1 {
        padding: 0px 20px;
        width: 70%;
    }
    .mainContent h1 img {
        width: 62%;
        height: auto;
    }
    section#main a.btn_animation {
        width: 80%;
        margin-top: 30px;
        position: relative;
        transition: all 0.2s ease;
    }
    .bg_img {
        background: url(../../img/png/main_bg_sp.png);
        background-position: bottom;
        background-size: cover;
        height: 480px;
        position: absolute;
        top: 0;
        width: 100%;
    }
    .bg_img:nth-child(2) {
        background: url(../../img/png/main_bg_sp_after.png);
        background-position: bottom;
        background-size: cover;
    }
    .bg_img:nth-child(3) {
        background: url(../../img/png/main_bg_sp_last.png);
        background-position: bottom;
        background-size: cover;
    }
    .image {
        position: absolute;
        width: 100%;
        opacity: 0;
        animation: bgAnime 15s infinite;
        /* 3画像 × 各5s = 20s */
    }
    .image:nth-of-type(1) {
        animation-delay: 0s;
    }
    .image:nth-of-type(2) {
        animation-delay: 5s;
        ;
    }
    .image:nth-of-type(3) {
        animation-delay: 10s;
    }
    @keyframes bgAnime {
        0% {
            opacity: 0;
        }
        5% {
            opacity: 1;
        }
        45% {
            opacity: 1;
        }
        50% {
            opacity: 0;
        }
        100% {
            opacity: 0;
        }
    }
}

@media (max-width: 450px) {
    .mainContent h1 img {
        width: 85%;
        height: auto;
    }
}