#slide4 {
    position: relative;
    overflow: hidden;
}

.backstory {
    display: flex;
    box-sizing: border-box;
    padding-top: 10vh;
}

.backstory-left {
    position: absolute;
    box-sizing: border-box;
    width: 85vw;
    height: 37vw;
    left: 0;
    top: 12vh;
    overflow: hidden;
    /* border-top-right-radius: 100px; */
}

.backstory-left-list {
    position: relative;
    width: 100%;
}

.backstory-left-list-big {
    animation-name: bigIcon;
    animation-duration: 1.5s;
    animation-iteration-count: infinite;
}

@keyframes bigIcon {
    0% {
        filter: brightness(100%);
    }

    50% {
        filter: brightness(50%);
    }

    100% {
        filter: brightness(100%);
    }
}

.backstory-left-list-big {
    position: absolute;
    right: 1vw;
    bottom: 2vh;
}

.backstory-right {
    position: absolute;
    width: 100%;
    height: 100%;
}

.backstory-right-title {
    background: url("../img/backstory_bg.png") no-repeat center;
    background-size: 100% 100%;
    position: absolute;
    width: 100%;
    height: 16.66vh;
    display: flex;
    align-items: center;
    justify-self: start;
    bottom: 18vh;
}

.backstory-right-title>img {
    position: absolute;
    width: 68.22vw;
    top: -1.2vh;
}

.backstory-right-str {
    height: 20.8125rem;
    /* background: wheat; */
    width: 70%;
    color: #BBA893;
    font-weight: 300;
    font-size: 1rem;
    text-align: left;
    padding-left: 3vw;
    box-sizing: border-box;
    padding-top: 5vh;
    font-family: "cn";
    line-height: 1.875rem;
}

.backstory-right-page {
    position: absolute;
    right: 5vw;
    top: 12vh;
    width: 10vw;
    height: 70vh;
    /* background: #fff; */
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.backstory-right-page-img {
    margin-top: 2.4rem;
    margin-bottom: 2.4rem;
    cursor: pointer;
}

.backstory-right-page-img1:hover {
    transform: scale(1.2);
}

.backstory-right-page-img2:hover {
    transform: scale(1.2);
}

.backstory-right-page-img3:hover {
    transform: scale(1.2);
}

.backstory-right-page-img4:hover {
    transform: scale(1.2);
}

.backstory-right-page-img5:hover {
    transform: scale(1.2);
}

.backstory-border {
    width: 100%;
    height: 100%;
}

.backstory-img {
    width: 100%;
    height: 100%;
    /* 保持原始比例，不被拉伸 */
    object-fit: contain;
}

@keyframes bigImg {
    0% {
        transform: scale(1.0);
    }

    50% {
        transform: scale(1.01);
    }

    100% {
        transform: scale(1.0);
    }
}

.slide-inner {
    position: absolute;
    width: 100%;
    left: 0;
    background-size: cover;
    background-position: center;
    display: -webkit-box;
    display: -ms-flexbox;
    display: -webkit-flex;
    display: flex;
    -webkit-box-pack: center;
    -ms-flex-pack: center;
    -webkit-justify-content: center;
    justify-content: center;
    -webkit-box-align: center;
    -ms-flex-align: center;
    -webkit-align-items: center;
    align-items: center;
    color: #fff;
}

@keyframes moveLeft {
    0% {
        transform: translateX(0);
    }

    50% {
        transform: translateX(-5px);
    }

    100% {
        transform: translateX(0);
    }
}

@keyframes moveRight {
    0% {
        transform: translateX(0);
    }

    50% {
        transform: translateX(5px);
    }

    100% {
        transform: translateX(0);
    }
}

#backstoryPre:hover {
    animation-name: moveLeft;
    animation-duration: 0.8s;
}

#backstoryNext:hover {
    animation-name: moveRight;
    animation-duration: 0.8s;
}

/* 背景图片容器样式 */
.backstory-page-container {
    background-image: url('../img/backstory/bg.png');
    background-position: center;
    background-repeat: no-repeat;
    background-size: contain;
}

.backstory-right-button {
    position: absolute;
    bottom: 12vh;
    right: 15vw;
    display: flex;
    justify-content: center;
    align-items: center;
}