.hi-slide {
    position: relative;
    width: 754px;
    height: 292px;
    margin: 115px auto 0;
    margin-bottom: 40px;
}

.hi-slide .hi-next,
.hi-slide .hi-prev {
    position: absolute;
    top: 50%;
    width: 40px;
    height: 80px;
    margin-top: -40px;
    border-radius: 5px;
    line-height: 80px;
    text-align: center;
    cursor: pointer;
    background-color: #0e2a34;
    color: #fff;
    opacity: 0.8;
    transition: all .6s;
    font-size: 30px
}

.hi-slide .hi-next:hover,
.hi-slide .hi-prev:hover {
    opacity: 1;
    background-color: #0e2a34
}

.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: 146px;
    width: 0;
    height: 0;
    margin: 0;
    padding: 0;
    border: 2px solid #fff;
    border-radius: 5px;
    background-color: #333;
    cursor: pointer
}

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

/* Adicione este bloco de regras de mídia para telas menores, como celulares */
@media (max-width: 767px) {
    .hi-slide {
        width: 50vw; /* 50% da largura da tela */
        height: 292px;
        margin: 115px auto 0;
    }

    .hi-slide>ul {
        width: 50vw; /* 50% da largura da tela */
        height: 292px;
    }

    .hi-slide>ul>li {
        width: calc(50vw - 20px); /* 50% da largura da tela menos margem */
        height: 252px; /* Ajuste a altura conforme necessário */
        left: calc(25vw - 10px); /* Posicionamento no centro */
        top: 20px; /* Ajuste conforme necessário */
    }
}