.hi-slide {
    position: relative;
    width: 754px;
    height: 292px;
    border-radius: 50px;
    margin: 115px auto 0;
}

.hi-slide .hi-next,
.hi-slide .hi-prev {
    position: absolute;
    top: 50%;
    width: 40px;
    height: 40px;
    margin-top: -20px;
    border-radius: 50px;
    line-height: 40px;
    text-align: center;
    background-color: white;
    color: black;
    transition: all .3s;
    font-size: 20px;
    font-weight: bold;
    cursor: pointer;
}

.hi-slide .hi-prev:hover,
.hi-slide .hi-next:hover {
    opacity: 1;
    background-color: rgb(255, 102, 0);
    color: white;
}

.hi-slide .hi-prev {
    left: -60px;
}

.hi-slide .hi-prev::before {
    content: '<';
}

.hi-slide .hi-next {
    right: -60px;
}

.hi-slide .hi-next::before {
    content: '>';
}

.hi-slide>ul {
    list-style: none;
    position: relative;
    width: 754px;
    height: 292px;
    margin: 0;
    padding: 0;
}

.hi-slide>ul>li {
    overflow: hidden;
    position: absolute;
    z-index: 0;
    left: 377px;
    top: 147px;
    width: 0;
    height: 0;
    margin: 0;
    padding: 0;
    border: 3px solid white;
    cursor: pointer;
    background-color: #333;
}

.hi-slide>ul>li>img {
    width: 100%;
    height: 100%;
    background-position: center;
}

@media only screen and (max-width:780px) {
    .hi-slide {
        width: 100vw;
        border-radius: 0px;
        margin: 60px auto 0;
    }

    .hi-slide .hi-prev {
        left: 0px;
        z-index: 999;
    }

    .hi-slide .hi-next {
        right: 0px;
        z-index: 999;
    }

    .hi-slide>ul {
        width: 100%;
        height: 292px;
        overflow: hidden;
    }

    .hi-slide>ul>li {
        margin-left: 5px;
    }
}


@media only screen and (max-width:450px) {

    .hi-slide>ul>li {
        margin-left: -165px;
    }

    .hi-slide .hi-prev,
    .hi-slide .hi-next {
        width: 25px;
        height: 25px;
        margin-top: -20px;
        border-radius: 50px;
        line-height: 25px;
        text-align: center;
        background-color: white;
        color: black;
        transition: all 0.3s;
        font-size: 15px;
        font-weight: bold;
        cursor: pointer;
    }

}

@media only screen and (max-width:375px) {
    .hi-slide>ul>li {
        margin-left: -190px;
    }
}

@media only screen and (max-width:320px) {
    .hi-slide>ul>li {
        margin-left: -218px;
    }
}