.header-bottom {
    height: 4.3rem;
}

header {
    background-color: rgba(21, 53, 178, .9);
}

.all-content-title h3,
.msg {
    color: #000000;
}

.banner-nav li a {
    color: #ffffff;
}

.contant-left input,
.contant-left textarea {
    background: #ffffff !important;
    color: rgba(0, 0, 0, 1)!important;
    border: 1px solid #A6A6A6;
}
input:-ms-input-placeholder,textarea:-ms-input-placeholder {
    color: #999!important;
    }
    input::-webkit-input-placeholder,textarea::-webkit-input-placeholder {
        color: #999!important;
    }



.banner {
    position: relative;
    width: 100%;
    height: 31.25rem;
    padding-top: 11.25rem;
    text-align: center;
    background: url('http://static.web3di.com/img/5_pic12@2x.jpg') no-repeat center;
    background-size: 100% 100%;
    color: #ffffff;
}

.banner video {
    display: none;
    width: 100%;
    height: 58.125rem;
    position: absolute;
    top: -2px;
    left: 0;
}

.banner h4 {
    font-size: 3.125rem;
    color: #ffffff;
}

.play {
    margin-top: 3rem;
    margin-bottom: 5.125rem;

}

.play img {
    width: 4.375rem;
    height: 4.375rem;
}

.banner-nav {
    width: 100%;
    height: 3.125rem;
    background: rgba(43, 48, 59, .3);
    height: 3.125rem;
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
}

.banner-nav ul {
    width: 32.25rem;
    display: flex;
    margin: 0 auto;
}

.banner-nav li {
    line-height: 3.125rem;
    width: 10.75rem;
    text-align: center;
}

.banner-nav li:first-child {
    background: linear-gradient(90deg, rgba(51, 102, 255, 1) 0%, rgba(51, 153, 254, 1) 100%);
}

.banner-nav li:hover {
    background: linear-gradient(90deg, rgba(51, 102, 255, 1) 0%, rgba(51, 153, 254, 1) 100%);
}

.culture,
.intro,
.scope {
    padding: 5.25rem 0;
}

.culture .all-content {
    width: 102rem;
    margin: 0 auto;
}

.all-content-title h3 {
    font-size: 2.1875rem;
    margin-bottom: 4.9375rem;
    font-weight: normal;
}

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

.cultrue-content {
    width: 27.875rem;
    font-size: 1rem;
    color: #333333;
    margin-left: 6.625rem;
}

.cultrue-content p {
    margin-bottom: 3.53125rem;
}

.cultrue-content p:last-child {
    margin-bottom: 0;
}

.cultrue-content img {
    display: none;
}

.cultrue-img {
    width: 67.5rem;
}

.cultrue-img img {
    width: 43.0625rem;
    height: 29rem;
}

.intro {
    background-color: #F9F9F9;
}

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

.intro-item {
    width: 11.875rem;
    text-align: center;
    white-space: nowrap;
}

.intro-item h2 {
    margin-bottom: 1.625rem;
    font-size: 3.125rem;
    color: #3385FF;
}

.intro-item p {
    font-size: 1.125rem;
    color: #333333;
}

.intro-info {
    margin-top: 4.0rem;
    line-height: 1.9rem;
}

.intro-info p {
    font-size: 1rem;
    margin-bottom: 2.34375rem;
}

.intro-info p:last-child {
    margin-bottom: 0;
}

.scope-info {
    text-align: left;
    margin: 0 auto;
    margin-bottom: 4.1875rem;
}

.scope-content {
    width: 79.8125rem;
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
}

.scope-item {
    width: 20%;
    margin-bottom: 3.625rem;
    text-align: center;
}

.scope-item img {
    width: 6rem;
    height: 6rem;
}

.scope-item p {
    font-size: 1.25rem;
}

#contact {
    background: #ffffff;
}

#allmap {
    width: 100%;
    height: 36.0625rem;
}

@media screen and (max-width: 750px) {
    .all-content {
        width: 41.875rem;
    }

    .scope-info {
        width: 100%;
    }

    .scope-info p,
    .cultrue-content p {
        width: 41.875rem;
    }

    .scope-content {
        width: 41.875rem;
    }

    .banner {
        height: 22.75rem;
        padding-top: 4.375rem;
    }

    .banner-nav {
        height: 4.375rem;
    }

    .play {
        margin-top: 2.75rem;
        margin-bottom: 2.375rem;
    }

    .banner-nav ul {
        width: 100%;
    }

    .banner-nav ul li {
        width: 15.625rem;
        height: 4.375rem;
        line-height: 4.375rem;
    }

    .culture,
    .intro,
    .scope {
        padding: 2.875rem 0;
        height: 100%;
    }

    .all-content-title {
        text-align: center;
    }

    .all-content-title h3 {
        margin-bottom: 2.125rem;
    }

    .cultrue-content img {
        display: block;
        width: 100%;
        height: 28.125rem;
    }

    .culture-info,
    .intro-info {
        height: 100%;
    }

    .cultrue-img {
        display: none;
    }

    .intro {
        background: #2B303B;
        color: #ffffff;
    }

    .intro-content {
        flex-wrap: wrap;
        height: 15.725rem;
        margin-bottom: 2.8125rem;
    }

    .intro-item {
        height: 7.75rem;
        background: rgba(0, 0, 0, .16);
    }

    .intro h2 {
        margin-bottom: .75rem;
        color: #3385FF;
    }

    .intro-item p {
        color: #FFFFFF;
    }

    .w232 {
        width: 14.5rem;
    }

    .w202 {
        width: 12.625rem;
    }

    .w334 {
        width: 20.875rem
    }

    .intro-info p:nth-child(n+3) {
        display: none;
    }

    .contant-left input {
        height: 4.25rem;
    }

    .contant-left button {
        width: 41.875rem;
        height: 5rem;
    }
}