:root {
    --color: #313131;
    --sub-color: #313131;
    --body-bg: #ffffff;
    --footer-bg: #787878;
    --text-color: #333;
    --ccc: #ccc;
    --eee: #eee;
    --white: #fff;
}

body {
    font-size: 14px;
    line-height: 1.8;
    color: var(--text-color);
    background-color: var(--body-bg);
    font-family: arial, helvetica, sans-serif;
    overflow-x: hidden;
}

body,
html {
    height: 100%;
    position: relative;
}

a {
    color: var(--text-color);
}

button,
span,
input,
div,
div:focus,
button:focus,
span:focus,
input:focus {
    outline: 0 !important;
}

a:hover,
a:focus {
    color: var(--color);
    text-decoration: none;
}

body,
dl,
dt,
dd,
ul,
ol,
li,
pre,
form,
fieldset,
input,
p,
blockquote,
th,
td {
    font-weight: 400;
    margin: 0;
    padding: 0;
}

h1,
h2,
h3,
h4,
h4,
h5 {
    margin: 0;
    padding: 0;
}

table {
    border-collapse: collapse;
}

ol,
ul,
li {
    list-style-image: none;
    list-style-position: outside;
    list-style-type: none;
}

.fl {
    float: left;
}

.fr {
    float: right;
}

.ttu {
    text-transform: uppercase;
}

.my-6 {
    margin-top: 4rem;
    margin-bottom: 4rem;
}

/* logo */
.logo {
    margin-right: 20px;
}

.logo a {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo .logo_txt {
    margin-left: 20px;
}

.logo_txt h2 {
    font-size: 30px;
    font-weight: bold;
    letter-spacing: 4px;
    margin-top: 25px;
}

.logo_txt p {
    font-size: 16px;
    text-transform: uppercase;
}

/* top */
.logo_text b {
    font-size: 32px;
}

.logo_text span {
    font-size: 18px;
    text-transform: uppercase;
    color: #666;
    letter-spacing: 2px;
}

.w-80 {
    position: relative;
    width: 80%;
    margin-left: auto;
    margin-right: auto;

}

.menu {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.menu>li {
    position: relative;
    flex: auto;
}

.menu>li>a {
    color: var(--white);
    line-height: 85px;
    font-size: 16px;
    display: inline-block;
    text-transform: uppercase;
}

.tell span {
    color: var(--color);
}

.tell p {
    font-size: 24px;
    line-height: 1;
}

/* nav */
.nav_bg {
    background-color: #313131;
}

.menu_drop {
    position: absolute;
    left: -20%;
    min-width: 100%;
    white-space: nowrap;
    background-color: var(--color);
    display: none;
    padding: 4px 0;
    z-index: 99;
}

.menu_drop li a {
    color: var(--white);
    display: block;
    text-align: center;
    line-height: 2;
    transition: all .5s;
}

.menu_drop li:hover a {
    background-color: var(--footer-bg);
    color: var(--white);
}

.swiper-pagination span {
    width: 12px;
    height: 12px;
}

.index-banner .swiper-pagination-bullet.swiper-pagination-bullet-active {
    background-color: var(--color);
}

/* banner */
.index-banner .swiper-button-next.swiper-button-white,
.index-banner .swiper-button-prev.swiper-button-white {
    background-color: rgba(0, 0, 0, .2);
}

.index-banner .swiper-button-prev,
.index-banner .swiper-button-next {
    background-size: 60%;
}

/* 右边 */
.side_kefu {
    display: none;
    position: fixed;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
}

.side_kefu li {
    position: relative;
    margin-bottom: 5px;
}

.side_kefu li i {
    font-size: 20px;
}

.side_kefu li.toTop {
    cursor: pointer;
}

.side_kefu li.toTop i {
    font-size: 24px;
}

.side_kefu li .side_kefu_con {
    position: absolute;
    background-color: var(--body-bg);
    border: 1px solid var(--ccc);
    border-radius: 5px;
    right: 0;
    top: 0;
    padding: 5px 10px;
    transition: all .5s;
    transform: translateX(100%);
    z-index: -1;
}

.side_kefu li:hover .side_kefu_con {
    transform: translateX(-50px);
}

.side_kefu_con:after {
    content: "";
    display: inline-block;
    width: 10px;
    height: 10px;
    border: 1px solid var(--ccc);
    border-color: transparent var(--ccc) var(--ccc) transparent;
    -webkit-transform: rotate(-45deg);
    transform: rotate(-45deg);
    position: absolute;
    right: -6px;
    top: 10px;
    background-color: var(--body-bg);
}

.side_kefu li span {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 40px;
    height: 40px;
    background-color: var(--color);
    color: var(--body-bg);
}

@media (min-width: 1200px) {
    .container {
        width: 1200px;
    }
}

@media(max-width: 1200px) {
    .my-6 {
        margin-top: 1.5rem;
        margin-bottom: 1.5rem;
    }
}

.container {
    max-width: 1200px;
}

.tell {
    display: flex;
    align-items: center;
}

.tell span {
    font-size: 22px;
    font-style: italic;
    font-weight: bold;
    color: var(--color);
}


/* search */
.search button {
    background: url(../images/search.png) no-repeat center;
    width: 55px;
    height: 55px;
    border: 0;
    background-color: transparent;
}

.search input {
    margin-right: 50px;
    width: 460px;
    line-height: 40px;
    border-radius: 8px;
    border: 2px solid #a0a0a0;
    padding-left: 20px;
}

.search form {
    display: flex;
    justify-content: center;
    align-items: center;
}

/* press */
.m60 {
    margin-top: 60px;
    margin-bottom: 60px;
}

.press p {
    margin-top: 20px;
    margin-bottom: 20px;
    font-size: 22px;
}

.rightdh {
    justify-content: flex-end;
    margin-bottom: 20px;
}

/* company */
.company {
    display: flex;
    background-color: #e7e7e7;
    justify-content: space-between;
}

.company .left,
.company .right {
    flex: 0 0 50%;
    width: 50%;
}

.company .left {
    background-color: #e7e7e7;
    font-size: 30px;
    padding-left: 200px;
    padding-right: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
}

.company_box h3 {
    font-size: 55px;
    font-weight: bold;
}

.company_box:first-child {
    margin-bottom: 80px;
}

.company .right {
    position: relative;
    margin-bottom: 40px;
}

.company .right:before {
    position: absolute;
    display: block;
    content: '';
    width: 20px;
    height: 270px;
    background-color: #333;
    left: -10px;
    top: 0;
    z-index: 99;
}

.company .right p {
    position: absolute;
    left: 50px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 40px;
    color: #fff;
    text-transform: uppercase;
}



/* coll */
.coll {
    max-width: 85%;
    margin: 60px auto;
}

.coll .title {
    font-size: 45px;
    text-transform: uppercase;
    color: #333;
    text-align: center;
    margin-bottom: 65px;
    position: relative;
    padding-bottom: 20px;
}

.coll .title:after {
    position: absolute;
    display: block;
    content: '';
    width: 230px;
    height: 8px;
    background-color: #333;
    left: 50%;
    bottom: 0;
    transform: translateX(-50%);
}

.coll_box {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
}

.coll_box li {
    flex: 0 0 49%;
    width: 49%;
    margin-bottom: 20px;
    position: relative;
    overflow: hidden;
}

.coll_box li img {
    max-width: 100%;
}

.coll_box li:after {
    position: absolute;
    display: block;
    content: '';
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, .9);
    left: 0;
    top: 0;
    z-index: 9;
    opacity: 0;
    transform: translateY(120%);
    transition: all .3s ease-in-out;
}

.coll_box li:hover:after {
    opacity: 1;
    transform: translateY(0);
}

.coll_box li p {
    position: absolute;
    z-index: 99;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 50px;
}

.coll .more {
    text-align: center;
    font-size: 30px;
    text-transform: uppercase;
}

/* exhi */
.exhi_title {
    font-size: 45px;
    text-transform: uppercase;
    margin-bottom: 60px;
}

.exhi {
    background-color: #bfbfbf;
    padding-top: 60px;
    padding-bottom: 20px;
}

.exhi-banner .swiper-slide {
    transform: scale(0.8);
    transition: 300ms;
}

.exhi-banner .swiper-slide-active,
.swiper-slide-duplicate-active {
    transform: scale(1.3);
    z-index: 99;
}

.exhi .swiper-button-prev:after,
.exhi .swiper-button-next:after {
    display: none !important;
}

.exhi .swiper-container {
    overflow-y: hidden;
    padding-bottom: 100px;
}

.exhi .swiper-container p {
    font-size: 14px;
    font-weight: bold;
    margin-top: 10px;
}

.exhi .swiper-button-prev {
    background: url(../images/left.png) no-repeat center;
    width: 60px;
    height: 60px;
    left: 30%;
}

.exhi .swiper-button-next {
    background: url(../images/right.png) no-repeat center;
    width: 60px;
    height: 60px;
    right: 30%;
}


/* abouts */
.abouts {
    display: flex;
    justify-content: space-between;
    background-color: #abcbcd;
    flex-wrap: wrap;
}

.abouts .left,
.abouts .right {
    width: 50%;
    flex: 0 0 50%;
}

.abouts .right {
    display: flex;
    align-items: center;
}

.abouts_box {
    margin-left: 100px;
    margin-right: 100px;
}

.abouts_box h2 {
    font-size: 43px;
    font-weight: bold;
}

.abouts_box p {
    font-size: 23px;
    font-family: arial;
    margin-top: 30px;
    margin-bottom: 40px;
}

.abouts_box a {
    font-size: 23px;
    display: inline-block;
    background-color: #262f32;
    color: #fff;
    text-transform: uppercase;
    text-align: center;
    padding: 5px 20px;
}

/* footer */
.foot_bg {
    background-color: #eee;
    padding-top: 60px;
    padding-bottom: 60px;
}

.foot_bg .w-80 {
    display: flex;
    justify-content: space-between;
}

.foot_bg .foot_l,
.foot_bg .foot_r {
    width: 50%;
    flex: 0 0 50%;
}

.foot_l {
    position: relative;
    padding-right: 50px;
}

.foot_l:after {
    position: absolute;
    display: block;
    content: '';
    width: 5px;
    height: 100%;
    right: 40px;
    top: 0;
    background-color: #878383;
}

.foot_l h2 {
    font-size: 36px;
    font-family: arial;
    color: #878383;
    position: relative;
    text-transform: uppercase;
    font-weight: bold;
}

.foot_l h2:after {
    display: block;
    content: '';
    width: 80px;
    height: 5px;
    background-color: #878383;
    margin-top: 15px;
    margin-bottom: 30px;
}

.foot_l p {
    font-size: 20px;
    color: #202020;
    line-height: 3;
    font-weight: bold;
}

.foot_r ul {
    display: flex;
    justify-content: space-between;
}

.foot_r ul li>a {
    font-weight: bold;
    font-size: 20px;
    margin-bottom: 20px;
    display: block;
}

.foot_r ul span {
    font-size: 20px;
    display: flex;
    flex-direction: column;
}

.foot_r ul span a {
    line-height: 3;
}

.flogo {
    margin-top: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
}

footer {
    background-color: #313131;
    color: #fff;
    padding-top: 15px;
    padding-bottom: 15px;
    font-size: 18px;
}

@media (max-width: 1200px) {


    .mhead {
        display: block;
    }

    /* mobile nav */
    .mobile_title {
        padding-left: 15px;
        padding-right: 15px;
        margin-bottom: 1rem;
        padding-top: 10px;
        margin-bottom: 0;
    }

    .mobile-logo a img {
        margin-right: 10px;
        max-width: 120px;
    }

    .mobile-logo h1 {
        font-size: 18px;
    }

    .mobile_title .right i {
        font-size: 30px;
        color: var(--color);
        border-radius: 4px;
    }

    .mobile_wrapper {
        position: fixed;
        z-index: 999;
        display: flex;
        min-width: 60%;
        right: -100%;
        top: 0;
        bottom: 0;
        background-color: #fff;
        padding: 10px 20px;
        transition: all 0.8s;
    }

    .mobile_wrapper.on {
        right: 0;
    }

    .mobile_wrapper>i {
        align-self: flex-end;
    }

    .mobile_menu {
        padding-left: 10px;
    }

    .mobile_wrapper li {
        position: relative;
        font-size: 16px;
        font-weight: bold;
        line-height: 3;
    }

    .mobile_wrapper li:not(:nth-last-of-type(1)) {
        border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    }

    .mobile_wrapper li i {
        font-size: 14px;
        color: #777;
    }

    .mobile_wrapper li .mobile_menu {
        display: none;
    }

    .mobile_wrapper li .mobile_menu li {
        font-size: 14px;
        font-weight: normal;
    }

    /* company */
    .company {
        flex-wrap: wrap;
    }

    .company .left,
    .company .right {
        flex: 0 0 100%;
        width: 100%;
        padding-left: 15px;
        padding-right: 15px;
    }

    .company .left {
        padding-top: 30px;
        padding-bottom: 30px;
    }

    .company_box h3 {
        font-size: 30px;
    }

    .company_box p {
        font-size: 18px;
    }

    .company .right p {
        font-size: 18px;
    }

    .coll .title {
        font-size: 20px;
        margin-bottom: 20px;
    }

    .coll_box li p {
        font-size: 16px;
    }

    .exhi_title {
        font-size: 20px;
        margin-bottom: 20px;
    }

    .exhi .swiper-button-next {
        right: 10px;
        top: 40%;
        transform: translateY(-50%);
    }

    .exhi .swiper-button-prev {
        left: 10px;
        top: 40%;
        transform: translateY(-50%);
    }

    .exhi-banner .swiper-slide-active {
        transform: scale(1);
    }

    .abouts .left,
    .abouts .right {
        flex: 0 0 100%;
        width: 100%;
    }

    .abouts_box {
        margin-left: 15px;
        margin-right: 15px;
        margin-top: 20px;
        margin-bottom: 20px;
    }

    .abouts_box h2 {
        font-size: 30px;
    }

    .abouts_box p {
        font-size: 16px;
    }

    .abouts_box a {
        font-size: 14px;
    }

    .company .right:before {
        display: none;
    }
    .coll .more{
        font-size: 16px;
    }
    .exhi{
        padding-top: 40px;
    }
    .exhi .swiper-container{
        padding-bottom: 20px;
    }
    .exhi .swiper-button-next,.exhi .swiper-button-prev{
        background-size:100%;
        width: 40px;
        height: 40px;
    }
}