@media screen and (max-width: 1280px) {

    .w {
        width: 96%;
    }

    /* 顶部 */
    .header-bottom-nav {
        display: none;
    }

    .header-bottom-other {
        display: flex;
        align-items: center;
    }

    .other-form-input2 {
        width: 36px;
        height: 36px;
        background-image: url(./search2.png);
    }

    .header .nav-home {
        display: block;
        margin-left: 20px;
    }


    /* phone导航栏 */
    body {
        position: relative;
    }

    .nav1 {
        width: 100%;
        height: 100%;
        background: rgba(0, 0, 0, 0.4);
        display: block;
        position: fixed;
        top: 0;
        left: -100%;
        overflow-y: scroll;
        transition: all 0.7s;
        z-index: 9999999;
    }

    .nav1 .nav-auto {
        width: 100%;
        height: 100%;
        margin: 0;
        overflow-y: scroll;
        background-color: #3a3a3a;
    }

    .left {
        left: 0;
    }

    .nav1 .nav-auto .nav1-bar {
        display: flex;
        justify-content: space-between;
        width: 100%;
        height: 70px;
        line-height: 70px;
        padding: 0 25px;
        background: #2c2c2c;
    }

    .nav1 .nav-auto .nav1-bar span {
        font-size: 24px;
        color: #fff;
    }

    .nav1 .nav-auto .nav1-bar .nav1-close {
        width: 50px;
        text-align: center;
    }

    .nav1 .nav-auto .nav1-bar .nav1-close img {
        width: 25px;
    }

    .nav1-ul1 {
        width: 100%;
        height: 100%;
        background-color: #3a3a3a;
    }

    .nav1-ul1 li {
        width: 100%;
        text-align: left;
    }

    .nav1-ul1 li a {
        float: left;
        width: 80%;
        line-height: 60px;
        display: block;
        height: 100%;
        font-size: 20px;
        color: #fff;
        transition: none;
        padding-left: 20px;
        border-bottom: 1px solid #525252;
    }

    .nav1-ul1 li .drop_01 {
        float: left;
        text-align: center;
        width: 20%;
        height: 61px;
        line-height: 61px;
        background: #3a3a3a;
        border-left: 2px solid #525252;
        border-bottom: 1px solid #525252;
    }

    .nav1-ul1 li .drop_01 img {
        width: 20px;
    }

    .nav1-ul1 li .active {
        background-color: #393939;
    }

    .nav1-ul1 li.active a {
        background: none;
        font-weight: bold;
        color: #ffffff;
    }

    .nav1-ul1 li:hover a {
        background: none;
        font-weight: bold;
    }

    .nav1-ul2 {
        background-color: #282828;
        display: none;
    }

    .nav1-ul2 li a {
        font-size: 20px;
        line-height: 60px;
        padding-left: 30px;
    }

    .nav1-ul2 li .drop_02 {
        float: left;
        text-align: center;
        width: 20%;
        height: 61px;
        line-height: 61px;
        background: #282828;
        border-left: 2px solid #525252;
        border-bottom: 1px solid #525252;
    }

    .nav1-ul2 li .drop_02 img {
        width: 20px;
    }

    .nav1-ul3 {
        background-color: #202020;
        display: none;
    }

    .nav1-ul3 li a {
        float: left;
        width: 80%;
        font-size: 18px;
        line-height: 50px;
        padding-left: 40px;
        border-bottom: 1px solid #525252;
    }

    .nav1-ul3 li .drop_02 {
        float: left;
        text-align: center;
        width: 20%;
        height: 51px;
        line-height: 51px;
        background: #202020;
        border-left: 2px solid #525252;
        border-bottom: 1px solid #525252;
    }

    .nav1-ul3 li .drop_02 img {
        width: 20px;
    }

    .nav1-ul4 {
        background-color: #000000;
        display: none;
    }

    .nav1-ul4 li a {
        float: left;
        width: 80%;
        font-size: 18px;
        line-height: 50px;
        padding-left: 40px;
        border-bottom: 1px solid #525252;
    }

    .nav1-ul4 li .drop_02 {
        float: left;
        text-align: center;
        width: 20%;
        height: 51px;
        line-height: 51px;
        background: #282828;
        border-left: 2px solid #525252;
        border-bottom: 1px solid #525252;
    }

    .nav1-ul4 li .drop_02 img {
        width: 20px;
    }
}

@media screen and (max-width: 500px) {

    .header .w {
        height: auto;
        padding-bottom: 20px;
    }

    .header-top {
        height: auto;
        margin-bottom: 20px;
    }

    .header-top span:nth-child(2) {
        display: none;
    }

    .header-bottom {
        flex-direction: column;
    }

    .header-bottom-other {
        width: 100%;
        justify-content: space-between;
    }
}