/* 初始化所有样式 */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Helvetica, "PingFang SC", "Microsoft Yahei", sans-serif;
    font-size: 14px;
}
body{
    width: 100vw;
    overflow:auto;
    overflow-x: hidden;
}

img{
    width: 100%;
}

 :root {
    --primary-color: #417BFC;
    --secondary-color: #e3e3e3;
    --text-color-lightest: #e7e9ec;
    --bg-color-blue : #304080;
    --text-color-darker: #2e2e2e;
    --text-color-dark: #494949;
    --text-color-gray: #8b8b8b;
    --text-color-dark-gray: #727272;
    --text-color-light-gray: #c6c6c6;
    --backdrop-color: rgba(42, 42, 42, 0.7);
}


/* grid布局 */

.grid {
    display: flex;
    flex-wrap: wrap;
    width: 100%;
    align-items: center;
    justify-content: space-around;
}
.grid.col-2>div:nth-child(2n),
.grid.col-3>div:nth-child(3n),
.grid.col-4>div:nth-child(4n),
.grid.col-5>div:nth-child(5n){
    margin-right: 0;
    margin-top: 20px;
}

.grid.col-1>div {
    width: 100%;
}

.grid.col-2>div {
    width: 40%;
}

.grid.col-3>div {
    width: 33.33%;
}

.grid.col-4>div {
    width: 25%;
}

.grid.col-5>div {
    width: 18%;
    text-align: center;
    margin-top: 20px;
}

.margin-top{
     margin-top: 100px;
 }
.margin-top-xl{
    margin-top: 80px;
}

.callus-btn{
    padding: 14px 32px;
    background-color: var(--primary-color);
    border: 0;
    border-radius: 4px;
    color: var(--text-color-lightest);
    font-size: 18px;
    cursor: pointer;
    outline: none;
}

.callus-btn:hover{
    box-shadow: 3px 3px 10px 2px rgba(91, 142, 255, 0.53);
}
.call_btn{
    position: absolute;
    bottom: 25px;
    left: 20px;
}

/* 栅格布局 */

header {
    width: 100vw;
    height: 80px;
    display: grid;
    padding: 0 40px;
    grid-template-columns: 1fr 2fr;
    align-content: center;
    position: relative;
    z-index: 200;
}

.logo {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-color-lightest);
}
ul,li{ padding:0;margin:0;list-style:none}

header nav {
    justify-self: end;
    line-height: 80px;
    height: 80px;
}
header nav  ul{
    zoom:1;
}
header nav ul li{
    display:inline;
    margin-left:20px;
    cursor: pointer;
    color: var(--text-color-lightest);
}
header nav i {
    color: var(--text-color-lightest);
}

header nav a {
    color: var(--text-color-lightest);
    text-decoration: none;
    margin: 0 24px;
}
header nav div{
    color: var(--text-color-lightest);
    margin: 0 24px;
}
header.burger {
    display: none;
}
.nav_item{
    display: inline-block;
    height: 80px;
    position: relative;
    color: var(--text-color-lightest);
}

header.sticky {
    position: fixed;
    background-color: white;
    box-shadow: 0 0 18px rgba(0, 0, 0, 0.2);
    animation: dropDown 0.5s ease-in-out forwards;
}

header.sticky .logo,
header.sticky nav a,
header.sticky nav div,
header.sticky nav ul li,
header.sticky nav ul li span,
header.sticky nav i {
    color: var(--text-color-darker);
}
#nav_product{
    position: relative;
}
#nav_product_items{
    display: none;
    position: absolute;
    top: 80px;
    left: -40px;
    width: 120px;
    background-color: #fff;
    box-shadow: 3px 3px 8px 0px rgba(0, 0, 0 ,0.2);
    z-index: 999;
}
.nav_product_item{
    margin: 0;
    height: 30px;
    line-height: 30px;
    display: block;
    text-align: center;
}


@keyframes dropDown {
    from {
        transform: translateY(-100px);
    }
    to {
        transform: translateY(0);
    }
}


/* 轮播图 */

.glide {
    position: relative;
    top: -80px;
    z-index: 50;
}

.glide__slide img,
.glide__slide video {
    width: 100vw;
    min-height: 240px;
    object-fit: cover;
}

.slide-caption {
    position: absolute;
    z-index: 70;
    color: var(--text-color-lightest);
    text-align: center;
    max-width: 60vw;
}


#news{
    padding: 0;
}
.glide__slide {
    display: flex;
    align-items: center;
    justify-content: center;
}

.slide-caption h1 {
    font-size: 54px;
    font-weight: 600;
}

.slide-caption h3 {
    font-size: 24px;
    margin: 48px 0px;
}

.slide-caption.left {
    max-width: 80vw;
    text-align: left;
}

.slide-caption>* {
    opacity: 0;
}

.backdrop {
    z-index: 60;
    position: absolute;
    width: 100%;
    height: 100%;
    left: 0;
    top: 0;
    opacity: 0.5;
}
.explore-btn {
    margin-top: 140px;
    padding: 14px 32px;
    background-color: var(--primary-color);
    border: 0;
    border-radius: 4px;
    color: var(--text-color-lightest);
    font-size: 18px;
    cursor: pointer;
    outline: none;
}

.index__panle_swiper_item_div_dot_items{
    display: flex;
    margin-top: 10px;
    text-align: left;
    align-items: center;
}
.index__panle_swiper_item_div_dot_items_image{
    width: 40px;
    height: 40px;
    margin-right: 10px;
}
/* 内容区域 */

.title1 {
    font-size: 34px;
    color: var(--text-color-darker);
    position: relative;
}


.title1::after {
    content: "";
    display: block;
    width: 80px;
    height: 4px;
    background-color: var(--primary-color);
    position: absolute;
    left: calc(50% - 40px);
}

.intro {
    margin: 50px 0 60px 0;
    /* text-indent: 2em; */
    font-size: 18px;
    color: var(--text-color-dark-gray);
}
.intro_h2{
    font-size: 30px;
    font-weight: 600;
    color:  var(--primary-color);
    line-height: 42px;
}


.meau{
    min-width: 60vw;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: space-around;
    border-bottom: 1px solid #CCCCCC;
}
.meau>.meau_item{
    font-size: 22px;
    font-weight: 500;
    cursor: pointer;
    line-height: 80px;
    width: 110px;
    text-align: center;
}
.meau_item.active{
    color: var(--primary-color);
    border-bottom: 4px solid var(--primary-color);
}



/*方案*/

.fangan_item {
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    border-radius: 7px;
    min-height: 420px;
    width: 60vw;
    padding: 24px;
    border : 1px solid var(--secondary-color);
    /*overflow: hidden;*/
}
.fangan_item_image{
    width: 60%;
}
.fangan_item_image_3{
    width: 40%;
}
.fangan_item_image_1{
    width: 40%;
}
.fangan_item_image_2{
    width: 94%;
}
.fangan_item>div{
    margin-left: 20px;
}
.fangan-title{
    font-size: 30px;
    font-weight: 500;
    color:var(--primary-color);
    line-height: 42px;
    margin-bottom: 10px;
}
/* 服务流程 */





@media (max-width: 1100px) {
    header nav {
        display: none;
    }
    header .burger {
        display: block;
        position: relative;
        width: 20px;
        height: 6px;
        justify-self: end;
        cursor: pointer;
    }

    .burger-line1,
    .burger-line2,
    .burger-line3 {
        width: 20px;
        height: 2px;
        background-color: var(--text-color-lightest);
    }
    .burger-line1 {
        position: absolute;
        top: -6px;
    }
    .burger-line3 {
        position: absolute;
        top: 6px;
    }
    header.open nav {
        display: grid;
        position: absolute;
        left: 0;
        top: 0;
        width: 100vw;
        height: 100vh;
        background-color: white;
        grid-auto-rows: max-content;
        justify-items: end;
        padding: 0 40px;
        opacity: 0;
        animation: slideDown 0.6s ease-out forwards;
    }
    header.open nav>* {
        font-size: 18px;
        margin: 4px 0;
        opacity: 0;
        color: var(--text-color-darker);
        animation: showMenu 0.5s linear forwards 0.4s;
    }
    header.opem nav>i.fas {
        margin-top: 10px;
    }
    header.open .burger-line1,
    header.open .burger-line2,
    header.open .burger-line3,
    header.sticky .burger-line1,
    header.sticky .burger-line2,
    header.sticky .burger-line3 {
        background-color: var(--text-color-darker);
        transform: 0.4s ease;
    }
    header.open .burger-line1 {
        transform: rotate(45deg) translate(3px, 5px);
    }
    header.open .burger-line2 {
        transform: translateX(5px);
        opacity: 0;
    }
    header.open .burger-line3 {
        transform: rotate(-45deg) translate(3px, -5px);
    }
    header.open .logo {
        z-index: 40;
        color: var(--text-color-darker);
    }
    @keyframes slideDown {
        from {
            height: 0;
            opacity: 0;
        }
        to {
            height: 100vh;
            padding-top: 80px;
            opacity: 1;
        }
    }
    @keyframes showMenu {
        from {
            opacity: 0;
            transform: translateY(-1vh);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }
    .grid.col-5>div {
        width: 48%;
        text-align: center;
    }



    .service-item .service-title {
        font-size: 20px;
    }
    .service-item .service-content {
        font-size: 14px;
        line-height: 24px;
    }
    .team-members {
        grid-template-columns: repeat(2, 1fr);
        row-gap: 36px;
        column-gap: 6vw;
    }
    .activities {
        grid-template-columns: repeat(2, 1fr);
        row-gap: 36px;
    }
}

@media(max-width: 992px) {
    .slide-caption h1 {
        font-size: 48px;
    }
    .slide-caption h3 {
        font-size: 18px;
    }
    .fangan_item{
        display: block;
        width: 80vw;
        vertical-align: center;
    }
    .fangan_item_image{
        width: 100%;
    }
    .fangan_item_image_1{
        width: 80%;
        margin-left: 10%;
    }
    .fangan_item_image_2{
        width: 100%;
    }
    .fangan_item_image_3{
        width: 100%;
    }
    .news_item_img {
        width: 136px;
        height: 100px;
    }
    .fangan_item>div{
        margin-top: 40px;
    }
    #bbs4{
        background-color: var(--bg-color-blue);
        width: 100vw;
        padding: 0 5%
    }
    .grid.col-5>div {
        width: 48%;
        text-align: center;
    }

    .call_btn{
        position: absolute;
        bottom: 5px;
        left: 20px;
    }
    .callus-btn{
        font-size: 14px;
        padding: 8px 18px;
    }
    .news,
    .features,
    .services {
        grid-template-columns: repeat(2, 1fr);
        grid-template-rows: unset;
    }
    .data-section {
        grid-template-columns: repeat(2, minmax(200px, auto));
        padding: 24px 0;
        height: auto;
        row-gap: 24px;
        background-size: 200%;
    }
    .showcases .case-item {
        width: calc(100vw/3);
    }
}

@media(max-width: 768px) {
    section,
    .footer-menus {
        padding: 0 40px;
        overflow: hidden;
    }
    .fangan_item{
        display: block;
        width: 80vw;
    }
    .fangan_item_image{
        width: 100%;
    }
    #bbs4{
        background-color: var(--bg-color-blue);
        width: 100vw;
        padding: 0 5%
    }
    .news_item_img {
        width: 136px;
        height: 100px;
    }
    .grid.col-5>div {
        width: 48%;
        text-align: center;
    }

    .fangan_item_image_1{
        width: 80%;
        margin-left: 10%;
    }
    .fangan_item_image_2{
        width: 100%;
    }
    .fangan_item>div{
        margin-top: 40px;
    }
    .fangan_item_image_3{
        width: 100%;
    }
    .call_btn{
        position: absolute;
        bottom: 5px;
        left: 20px;
    }
    .callus-btn{
        font-size: 14px;
        padding: 8px 18px;
    }
    .footer-menus {
        grid-template-columns: 2fr repeat(2, 1fr);
        row-gap: 24px;
    }
    .contact-us {
        grid-row: 1 / 3;
    }
    .footer-menus {
        text-align: right;
    }
    .activities {
        grid-template-columns: 1fr;
        row-gap: 36px;
    }
    .data-section {
        grid-template-columns: 1fr;
        background-size: 300%;
    }
    .team-members {
        grid-template-columns: minmax(200, 400);
    }
    .news,
    .features,
    .services {
        grid-template-columns: 1fr;
    }
    .showcases .case-item {
        width: calc(100vw /2);
        height: 30vw;
    }
}

@media(max-width: 576px) {
    .title1{
        font-size: 24px;
    }
    .fangan_item{
        display: block;
        width: 80vw;
    }
    .fangan_item>div{
        margin-top: 40px;
    }
    #bbs4{
        background-color: var(--bg-color-blue);
        width: 100vw;
        padding: 0 5%
    }
    .news_item_img {
        width: 136px;
        height: 100px;
    }
    .news_item{
        padding: 10px;
        width: 100vw;
    }
    .news_item .news_item-content {
        min-width: 60%;
    }

    .grid.col-5>div {
        width: 48%;
        text-align: center;
    }
    .grid.col-5>div:last-child {
        display: none;
    }
    .fangan_item_image{
        width: 100%;
    }
    .fangan_item_image_3{
        width: 100%;
    }
    .fangan_item_image_1{
        width: 80%;
        margin-left: 10%;
    }
    .fangan_item_image_2{
        width: 120%;
        margin-left: -10%;
    }
    .call_btn{
        position: absolute;
        bottom: -10px;
        left: 20px;
    }
    .title2{
        font-size: 20px;
    }
    .title1::after {
        content: "";
        display: block;
        width: 80px;
        height: 4px;
        background-color: var(--primary-color);
        margin-top: 14px;
        position: absolute;
        left: calc(50% - 40px);
    }
    .slide-caption h1 {
        font-size: 28px;
    }
    .slide-caption h3 {
        font-size: 14px;
    }
    .scroll-to-top a{
        right: 40px;
    }
    .explore-btn {
        font-size: 14px;
        padding: 8px 18px;
    }
    .callus-btn{
        font-size: 14px;
        padding: 8px 18px;
    }
    .showcases .case-item {
        width: 100vw;
        height: 60vw;
    }
    .footer-menus {
        grid-template-columns: 1fr;
    }
    .footer-menus {
        justify-self: start;
        text-align: left;
    }
    #index_1{
        width: 110%;
        margin-left: -5%;
    }
}
.color_1 {
    background-color: #99CDFE;
}
.color_2 {
    background-color: #C9AFEF;
}
.color_3 {
    background-color: #F58A8A;
}
.color_4 {
    background-color: #F9C1A0;
}
.color_5 {
    background-color: #A580E3;
}