@media screen and (min-width: 1200px) {
    .header_box {
        position: relative;
        width: 100%;
        height: 85px;
        box-shadow: 0 2px 4px gray;
        background-color: #ffffff;
        z-index: 99;

    }

    .header_container {
        width: 1200px;
        height: 100%;
        margin: 0 auto;
        display: flex;
        justify-content: space-between;
        align-items: center;

    }

    .logo {
        width: 250px;
        height: 61px;
        display: block;
    }

    .logo img {
        width: 250px;
        height: 61px;
    }

    .nav_box {
        height: 100%;
    }

    .nav_ul {
        display: flex;
    }

    .nav_ul li {
        margin-right: 45px;
        display: block;
        line-height: 85px;
        cursor: pointer;
        color: #333;
        font-weight: 400;
        font-size: 16px;
        transition: all 400ms linear;
    }

    .nav_ul li:hover {
        color: #460777;
        text-shadow: .5px 0 0 #460777, 0 .5px 0 #460777, -.5px 0 0 #460777, 0 -1.5px 0 #460777;
    }

    .scroll_nav {
        position: fixed;
        top: 0px;
        left: 0px;
        height: 65px;
    }

    .scroll_nav .nav_box ul li {
        margin-right: 30px;
        line-height: 65px;
    }

    .menu {
        display: none;
    }
}


@media screen and (min-width: 800px) and (max-width: 1200px) {
    .header_box {
        position: relative;
        width: 100%;
        box-shadow: 0 2px 4px gray;
        background-color: #ffffff;
        z-index: 99;

    }

    .header_container {
        width: 95%;
        height: 100%;
        margin: 0 auto;
        box-sizing: border-box;
    }

    .logo {
        width: 250px;
        height: 61px;
        display: block;
    }

    .logo img {
        width: 250px;
        height: 61px;
    }

    .nav_box {
        height: 100%;
    }

    .nav_ul {
        display: flex;
        flex-wrap: wrap;
    }

    .nav_ul li {
        margin: 0 10px;
        display: block;
        line-height: 85px;
        cursor: pointer;
        color: #333;
        font-weight: 400;
        font-size: 16px;
        transition: all 400ms linear;
    }

    .nav_ul li:hover {
        color: #460777;
        text-shadow: .5px 0 0 #460777, 0 .5px 0 #460777, -.5px 0 0 #460777, 0 -1.5px 0 #460777;
    }

    .scroll_nav {
        position: fixed;
        top: 0px;
        left: 0px;
    }

    .scroll_nav .nav_box ul li {
        margin: 0 10px;
        line-height: 65px;
    }

    .scroll_nav .header_container {
        padding-top: 10px;
    }

    .menu {
        display: none;
    }
}

@media screen and (max-width: 800px) {
    .header_box {
        position: relative;
        width: 100%;
        box-shadow: 0 2px 4px gray;
        background-color: #ffffff;
        z-index: 99;
    }

    .header_container {
        width: 95%;
        height: 100%;
        margin: 0 auto;
        box-sizing: border-box;
    }

    .logo {
        width: 180px;
        height: auto;
        display: block;
    }

    .logo img {
        width: 180px;
        height: auto;
    }

    .nav_box {
        position: absolute;
        left: 0;
        width: 100%;
        height: 0px;
        overflow: hidden;
        transition: all 400ms linear;
        box-shadow: 0 2px 4px gray;
        background-color: #f9f9fb;

    }

    .menu {
        width: 30px;
        height: 30px;
        top: 10px;
        position: absolute;
        right: 20px;
    }

    .nav_ul {
        width: 100%;
    }

    .nav_ul li {
        width: 100%;
        display: block;
        line-height: 40px;
        padding-left: 5%;
        cursor: pointer;
        color: #333;
        font-weight: 400;
        font-size: 16px;
        background-color: #f9f9fb;
        border-top: 1px solid #e2e2e2;
    }

    .nav_ul li:hover {
        color: #460777;
        text-shadow: .5px 0 0 #460777, 0 .5px 0 #460777, -.5px 0 0 #460777, 0 -1.5px 0 #460777;
    }

    .scroll_nav {
        position: fixed;
        top: 0px;
        left: 0px;
        width: 100%;
        height: auto;
        background-color: #ffffff;
    }

    .scroll_nav .header_container {
        padding-top: 10px;
    }

    .scroll_nav .menu {
        top: 16px;
    }
}