body {
    background-color: var(--color-black);
    overflow: hidden;
}

.art-container,
.art-content,
.art-item {
    height: 100%;
}
.art-content {
    position: relative;
}
.art-item {
    float: left;
    position: relative;
    width: 25%;
}
.art-item .image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: no-repeat center top / 100%;
    transition: all .3s linear;
}
.art-item .box img {
    display: block;
    width: 100%;
}
.art-item .block {
    padding: 0 80px;
}
.art-item .block .text p {
    margin-bottom: 20px;
    color: var(--color-gray);
    font-size: 14px;
    text-align: justify;
}
.art-item .block .text p:last-child {
    margin-bottom: 0;
}
.art-item .block .goto {
    margin-top: 20px;
    font-size: 0;
    text-align: right;
}
.art-item .block .goto a {
    display: inline-block;
    border-bottom: 1px solid var(--color-dark);
    color: var(--color-dark);
    font-size: 14px;
}
.art-item .block .goto a:hover {
    border-color: var(--theme-color);
    color: var(--theme-color);
}
.art-item .image.style-2 {
    opacity: 0;
}
.art-item .image.style-1 {
    opacity: 1;
}
.art-item:hover .image.style-2 {
    opacity: 1;
}
.art-item:hover .image.style-1 {
    opacity: 0;
}
.art-image {
    position: absolute;
    left: 38%;
    bottom: 0;
    pointer-events: none;
}
.art-image img {
    display: block;
    width: 330px;
}
.art-back {
    display: block;
    position: fixed;
    right: 48px;
    bottom: 30px;
    padding-right: 50px;
    font-size: 20px;
    z-index: 202301;
}
.art-back::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    width: 20px;
    background: url('../../images/icon_arrows_left_1_white.png') no-repeat right center / 20px;
    animation: ani-brand-cases 1s infinite;
}
.art-back span {
    color: var(--color-white);
}
.art-back:hover {
    opacity: .8;
}

@keyframes ani-brand-cases {
    0% {
        transform: translateX(0) ;
    }
    50% {
        transform: translateX(-50%);
    }
    100% {
        transform: translateX(0%);
    }
}