.zulu__main-back {
    background-color: #000000;
    background-image: url(../image/back-main.png);
    background-repeat: no-repeat;
    background-size: 100%;
}

.site {
    max-width: 1040px;
    width: 100%;
    margin: auto;
    padding-bottom: 40px;
}

.zulu__block {
    max-width: 980px;
    width: 100%;
    margin: auto;
}

.site-main {
    display: flex;
    justify-content: space-between;
}

.site-header {
    padding-top: 25px;
}

.sidebar {
    width: 30%;
}

.news {
    width: 65%;
}

.header__desc {
    margin: 8.5vw auto 2.5vw;
}

/*chain*/

.chain::before {
    content: '';
    position: absolute;
    background-image: url(../image/chain.png);
    background-repeat: no-repeat;
    width: 70%;
    height: 90px;
    background-size: cover;
    top: -75px;
    left: 0;
    right: 0;
    margin: auto;
    z-index: -1;
}

.copyright {
    color: #a35f32;
    width: 100%;
    text-align: center;
    margin-top: 30px;
}

@media (max-width: 1023px) {
    .zulu__main-back {
        background-image: none;
        min-height: 100vh;
    }
    .site-main {
        min-height: 100vh;
        flex-direction: column;
    }
    .site {
        width: 100%;
        margin-top: 80px;
    }
    .site-header {
        padding-top: 0;
    }
    .sidebar {
        order: 2;
        width: 100%;
    }
    .copyright {
        margin-top: 0;
    }
}