* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

#container {
    width: 70vw;
    height: 75vh;
    overflow: hidden;
    /* 图片顶边距 */
    margin: 280px auto;
    position: relative;
}
.show {
    display: none;
    animation: effectSlide 2s;
}
@keyframes effectSlide {
    from {
        opacity: 0.2; 
    }
    to {
        opacity: 1;
    }
}
.show, .show img {
    width: 100%;
    height: 100%;
    position: absolute;
}
.caption {
    position: absolute;
    z-index: 1;
    color: white;
    padding: 1rem 0 0 1rem;
    font-size: 14px;
}
.leftArrow, .rightArrow {
    /* 修改切图箭头颜色 */
    color: #759690;
    /* 切图箭头的大小 */
    font-size: 22px;
    position: absolute;
    top: 50%;
    transform: translate(0,-50%);
    padding-top: 12px;
    display: block;
    /* 切图箭头背景色 宽度 高度 */
    width: 40px;
    height: 55px;
    cursor: pointer;
    text-align: center;
    transition: 0.3s ease;
}
.rightArrow {
    right: 0;
}
.leftArrow:hover, .rightArrow:hover {
    /* 切图箭头 鼠标悬停颜色 */
    background-color: #e40606;
}
.circle {
    position: absolute;
    bottom: 1rem;
    width: 100%;
    text-align: center;
}
.mark {
    display: inline-block;
    width: 10px;
    height: 10px;
    /* 修改3个圆点颜色 */
    background-color: #759690;
    padding: 8px;
    border-radius: 50%;
    cursor: pointer;
    transition: 0.2s ease;
}
.mark:hover {
    /* 修改3个圆点 鼠标悬停颜色 */
    background-color: #ff0505;
}