* {
    margin: 0;
    padding: 0;
}

@media screen and (max-width: 768px) and (min-width: 200px) {
    div img{
        max-width: 100%;
    }
    /*banner区域 end*/
    .carousel a {
        list-style: none;
    }
    .carousel li {
        list-style: none;
        display: flex;
        width: 100%;
        justify-content: center;
        align-items: center;
    }

    .carousel {
        width: 100%;
    }

    .carousel .content {
        height: 300px;
        margin: 0 auto 0;
        position: relative;
    }

    .carousel #item {
        width: 100%;
        height: 100%;

    }

    .carousel .item {
        width: 100%;
        position: absolute;
        opacity: 0;
        transition: all 1s;
        overflow: hidden;
    }

    .carousel .item.active {
        opacity: 1;
    }

    .carousel img {
        /*width: 100%;*/

        height: 300px;
    }

    .carousel #btn-left {
        display: none;
        width: 30px;
        height: 69px;
        font-size: 30px;
        color: white;
        box-shadow: white 0 0 5px;
        background-color: rgba(0, 0, 0, 0.65);
        line-height: 69px;
        padding-left: 5px;
        z-index: 10; /*始终显示在图片的上层*/
        position: absolute;
        left: 40px;
        top: 50%;
        transform: translateY(-60%); /*使按钮向上偏移居中对齐*/
        cursor: pointer;
        user-select: none;
        border-radius: 8px;
        transition: opacity 0.3s ease-in-out, background-color 0.3s ease-in-out;
    }


    #btn-left:hover {
        background-color: rgba(0, 0, 0, 0.65);
    }

    .carousel #btn-right {

        display: none;
        border-radius: 8px;
        user-select: none;
        width: 26px;
        height: 69px;
        font-size: 30px;
        color: white;
        box-shadow: white 0 0 5px;
        background-color: rgba(0, 0, 0, 0.65);
        line-height: 69px;
        padding-left: 5px;
        z-index: 10;
        position: absolute;
        right: 40px;
        top: 50%;
        cursor: pointer;
        transform: translateY(-60%);
        transition: opacity 0.3s ease-in-out, background-color 0.3s ease-in-out;
    }


    .carousel #circle {
        height: 20px;
        display: flex;
        position: absolute;
        bottom: 5px;
        left: calc(50% - 50px);

        align-items: center;
        padding-bottom: 1px;
        border-radius: 10px;
    }

    .carousel .circle {
        width: 10px;
        height: 10px;
        border-radius: 10px;
        /*border: 2px solid white;*/
        background: rgba(0, 0, 0, 0.4);
        box-shadow: 0 0 5px rgba(0, 0, 0, 0.5);
        cursor: pointer;
        margin: 5px;
    }

    .carousel .white {
        background-color: #FFFFFF;
    }
}

@media all and (min-width: 768px) {
    .carousel a {
        list-style: none;

    }

    .carousel li {
        list-style: none;
        display: flex;
        width: 100%;
        justify-content: center;
        align-items: center;
    }

    .carousel {
        width: 100%;
    }

    .carousel .content {
        height: 300px;
        margin: 0 auto 0;
        position: relative;
    }

    .carousel #item {
        width: 100%;
        height: 100%;

    }

    .carousel .item {
        width: 100%;
        position: absolute;
        opacity: 0;
        transition: all 1s;
        overflow: hidden;
    }

    .carousel .item.active {
        opacity: 1;
    }

    .carousel img {
        /*width: 100%;*/

        height: 300px;
    }

    .carousel #btn-left {
        width: 30px;
        height: 69px;
        font-size: 30px;
        color: white;
        background-color: rgba(0, 0, 0, 0.4);
        line-height: 69px;
        padding-left: 5px;
        z-index: 10; /*始终显示在图片的上层*/
        position: absolute;
        left: 40px;
        top: 50%;
        transform: translateY(-60%); /*使按钮向上偏移居中对齐*/
        cursor: pointer;
        opacity: 0; /*平时隐藏*/
        user-select: none;
        border-radius: 8px;
        transition: opacity 0.3s ease-in-out, background-color 0.3s ease-in-out;
    }

    .carousel:hover #btn-left {
        /*鼠标滑入，显示图标*/
        opacity: 1;
    }

    #btn-left:hover {
        background-color: rgba(0, 0, 0, 0.65);
    }

    .carousel #btn-right {
        border-radius: 8px;
        user-select: none;
        width: 26px;
        height: 69px;
        font-size: 30px;
        color: white;
        background-color: rgba(0, 0, 0, 0.4);
        line-height: 69px;
        padding-left: 5px;
        z-index: 10;
        position: absolute;
        right: 40px;
        top: 50%;
        cursor: pointer;
        opacity: 0;
        transform: translateY(-60%);
        transition: opacity 0.3s ease-in-out, background-color 0.3s ease-in-out;
    }

    .carousel:hover #btn-right {
        opacity: 1;
    }

    #btn-right:hover {
        background-color: rgba(0, 0, 0, 0.65);
    }

    .carousel #circle {
        height: 20px;
        display: flex;
        position: absolute;
        bottom: 5px;
        left: calc(50% - 50px);

        align-items: center;
        padding-bottom: 1px;
        border-radius: 10px;
    }

    .carousel .circle {
        width: 10px;
        height: 10px;
        border-radius: 10px;
        /*border: 2px solid white;*/
        background: rgba(0, 0, 0, 0.4);
        box-shadow: 0 0 5px rgba(0, 0, 0, 0.5);
        cursor: pointer;
        margin: 5px;
    }

    .carousel .white {
        background-color: #FFFFFF;
    }
}