* {
    margin: 0;
    padding: 0;
}

html {
    height: 100%;
    font-family: 'Microsoft YaHei';
}

ul,
li {
    font-style: normal;
    list-style: none;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: normal;
}

a {
    text-decoration: none;
}

img {
    width: 100%;
}

body {
    background: rgba(2, 4, 46, .8);
}

.wrap {
    position: relative;
    width: 100%;
    height: 100%;
    overflow: hidden;
    left: 0;
    transition: all .3s;
}

.wrap.left {
    left: -70%;
}

.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 90px;
    line-height: 80px;
    z-index: 20;
    transition: all .3s;
}

.header:hover,
.header.active {
    background: #13131d;
}

video {
    display: block;
}

.header h1 {
    float: left;
    width: 150px;
    height: 90px;
    margin-left: 20px;
    background: url('../img/logo.png?v=222') no-repeat center 20px;
    background-size: 100%;
}

.header h1 a {
    display: block;
    width: 100%;
    height: 100%;
}

.nav {
    float: right;
    padding-right: 50px;
    font-size: 18px;
    font-weight: 400;
}

.nav>li {
    position: relative;
    display: inline-block;
    height: 90px;
}

.nav>li>a {
    position: relative;
    display: block;
    padding: 0 40px;
    color: #fff;
    transition: all .5s;
}

.nav>li:hover>a,
.nav>a:hover,
.nav>li.active>a,
.menu a:hover,
.menu .active {
    color: #5060f7;
    cursor: pointer;
}

.nav>li:hover:after,
.nav>li.active:after {
    content: '';
    position: absolute;
    left: 50%;
    top: 65px;
    width: 30px;
    height: 3px;
    margin-left: -15px;
    overflow: hidden;
    background: #5060f7;
}

.menu {
    position: fixed;
    top: 90px;
    left: 0;
    display: flex;
    width: 100%;
    height: 0;
    line-height: 30px;
    border-top: 0px solid rgba(170, 170, 170, 0);
    background: #13131d;
    font-size: 14px;
    transition: all .3s;
    color: #fff;
    overflow: hidden;
}

.menu li {
    flex: 1;
    margin: 30px 0;
    border-right: 1px solid rgba(160, 160, 160, .2);
}

.menu li:last-child {
    border: 0;
}

.menu li.more {
    flex: 1.2;
}

.menu dl {
    display: block;
    width: 220px;
    margin: 0 auto;
    font-weight: 300;
}

.menu dt {
    margin-bottom: 8px;
    color: #fff;
    font-size: 18px;
}

.menu dt:before {
    content: '';
    position: relative;
    top: 2px;
    display: inline-block;
    width: 4px;
    height: 18px;
    margin-right: 10px;
    background: #3D81FF;
}

.menu dd {
    padding: 4px 0 4px 14px;
    font-size: 14px;
}

.menu .more dl {
    width: 300px;
}

.menu .more dd {
    float: left;
    width: 30%;
}

.menu .more .ex {
    width: 26%;
}

.menu dd a {
    color: #C8CCE0;
}

.menu a {
    color: #fff;
}

.nav>li:hover .menu {
    height: 280px;
    border-top: 1px solid rgba(170, 170, 170, .1);
}


/* 手机导航 */

.phone {
    position: fixed;
    top: 0;
    left: 0;
    display: none;
    width: 100%;
    height: 60px;
    color: #fff;
    z-index: 30;
    background: rgba(2, 4, 46, .8);
}

.logo {
    margin-left: 10px;
}

.phone a {
    display: block;
    width: 100px;
    height: 50px;
    background: url(../img/phone.png) no-repeat center center;
    background-size: 100%;
}

.phone-menu {
    position: fixed;
    top: 60px;
    right: -100%;
    width: 70%;
    height: calc(100% - 60px);
    background: rgba(2, 4, 46, .8);
    z-index: 35;
    overflow: auto;
    transition: all .3s;
    -webkit-overflow-scrolling: touch;
}

.phone-menu.left {
    right: 0;
}

.phone-menu>ul {
    padding: 15px 30px;
    color: #fff;
}

.phone-menu li>a {
    display: block;
    line-height: 46px;
    border-bottom: 1px solid rgba(255, 255, 255, .2);
    color: #fff;
    font-size: 16px;
}

.phone>section {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    height: 60px;
}

.phone .btn {
    width: 60px;
    height: 60px;
    background-position: center center;
    background-repeat: no-repeat;
    background-image: url('../img/menu.png');
    background-size: 50%;
    transition: all .5s;
}

.phone .btn.close {
    background-image: url('../img/close.png');
}

.page1 {
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.page1 video {
    width: 100%;
    object-fit: cover;
}

.page1 .hb {
    display: none;
}

.page2 {
    width: 100%;
}

.page2 ul {
    overflow: hidden;
}

.page2 li {
    position: relative;
    float: left;
    width: 25%;
    height: 520px;
    overflow: hidden;
    font-size: 16px;
    color: #fff;
}

.page2 li>div {
    width: 100%;
    height: 100%;
    background-repeat: no-repeat;
    background-position: 50% center;
    background-size: cover;
    transition: all 1s;
}

.page2 li:nth-child(1)>div {
    background-image: url('../img/bj_wifi.jpg');
}

.page2 li:nth-child(2)>div {
    background-image: url('../img/bj_ai.jpg');
}

.page2 li:nth-child(3)>div {
    background-image: url('../img/bj_energy.jpg');
}

.page2 li:nth-child(4)>div {
    background-image: url('../img/bj_city.jpg');
}

.page2 li:hover>div {
    transform: scale(1.1);
}

.p2Content {
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    text-align: center;
    font-weight: 300;
}

.p2Content .icon {
    position: relative;
    width: 80px;
    height: 80px;
    margin: 120px auto 0;
    background-position: center center;
    background-repeat: no-repeat;
    background-size: 100%;
}

.p2Content .icon:after {
    content: '';
    position: absolute;
    left: 50%;
    bottom: -25px;
    width: 40px;
    height: 4px;
    margin-left: -20px;
    overflow: hidden;
    background: #fff;
}

.page2 ul img {
    width: 100%;
}

.p2Content h3 {
    margin: 60px 0 15px;
    font-size: 28px;
    font-weight: 300;
}

.p2Content>section {
    display: inline-block;
}

.p2Content>section>div {
    background: url(../img/box.png) no-repeat left top;
    background-size: 28px;
}

.p2Content>section>div>div {
    background: url(../img/box2.png) no-repeat right top;
    background-size: 28px;
}

.p2Content p {
    min-width: 80px;
    line-height: 28px;
    padding: 7px 30px 10px;
    font-size: 15px;
}

.p2Content p span {
    display: block;
}

.p2Explain {
    position: relative;
    overflow: hidden;
}

.p2Explain .bg {
    position: absolute;
    left: 50%;
    width: 100%;
    transform: translateX(-50%);
}

.p2Explain>section {
    position: relative;
    display: flex;
    align-items: center;
    width: 80%;
    overflow: hidden;
}

.p2Explain>.c1 {
    margin: 40px auto 10px;
}

.p2Explain>.c2 {
    margin: 10px auto 40px;
}

.p2Explain h4 {
    color: #E4E3F3;
    font-size: 34px;
}

.p2Explain p {
    line-height: 36px;
    margin-top: 20px;
    color: rgba(206, 205, 232, .7);
    font-size: 18px;
}

.p2Explain .img {
    width: 35%;
    overflow: hidden;
}

.fl {
    margin-right: 5%;
}

.fr {
    margin-left: 5%;
}

.p2Explain .text {
    width: 60%;
}

.page3 {
    position: relative;
    width: 100%;
}

.page3 img {
    display: block;
    width: 100%;
}

.page3>div {
    position: absolute;
    top: 21%;
    left: 15%;
    color: #fff;
}

.page3 h5 {
    margin-bottom: 50px;
    font-size: 30px;
}

.page3 .circle:after {
    content: '';
    display: inline-block;
    width: 8px;
    height: 8px;
    margin: 0 20px;
    border-radius: 50%;
    background: #fff;
    overflow: hidden;
    vertical-align: middle;
}

.page3 h6 {
    margin-bottom: 50px;
    font-size: 36px;
}

.page3 p {
    line-height: 40px;
    text-indent: 25px;
    font-size: 18px;
    background: url(../img/case_icon_s.png) no-repeat left center;
    background-size: 4%;
}

.page3 a {
    display: block;
    width: 150px;
    margin-top: 40px;
    padding: 8px 0 10px;
    border: 1px solid #fff;
    border-radius: 4px;
    color: #fff;
    text-align: center;
    font-size: 20px;
    transition: all .5s;
}

.page3 a:hover {
    border: 1px solid #52faef;
    background: #52faef;
}

h2 {
    padding: 55px 0;
    color: #666;
    text-align: center;
    font-size: 40px;
    font-weight: 300;
    background-color: #fff;
}

.scale {
    padding-top: 2px;
    font-size: 13px;
    color: #999;
    text-transform: uppercase;
}

.page4 {
    min-height: 450px;
    padding: 0 10%;
    background: #050730 url(../img/tail_bj.png) no-repeat center center;
    background-size: 100%;
    color: #fff;
}

.page4 a:hover {
    color: #5060f7;
}

.quick-menu {
    display: flex;
}

.quick-menu>div {
    flex: 1;
    flex-shrink: 0;
    padding: 50px 0;
}

.quick-menu dt {
    padding: 20px 0;
    font-size: 16px;
}

.quick-menu dd {
    padding: 5px 0;
    font-size: 12px;
}

.quick-menu dd a {
    color: #fff
}

.deal dd {
    float: left;
    width: 36%;
}

.copyright {
    padding: 40px 0 0;
    text-align: center;
}

.copyright div {
    padding-top: 20px;
}

.copyright .cp {
    font-size: 12px;
}

.copyright span {
    padding: 0 20px;
}

.copyright a {
    color: #fff;
}

.copyright b,
.copyright em {
    font-weight: normal;
    font-style: normal;
}

.copyright b:after {
    content: "|";
    padding: 0 10px;
}

.copyright em {
    font-size: 13px;
}

.copyright .c:after {
    content: "\2022";
    padding: 0 10px;
}

.play {
    display: none;
}

.isShow {
    display: block;
}

@media screen and (min-width: 1301px) and (max-width: 1680px) {
    .page4 {
        padding: 0 40px;
    }
}

@media screen and (max-width: 1300px) and (min-width: 751px) {
    .wrap {
        width: 1300px;
    }
    .nav>li>a {
        padding: 0 15px;
    }
    .page4 {
        padding: 0 40px;
    }
}

@media screen and (max-width: 750px) {
    .header {
        display: none !important;
    }
    .phone {
        display: block;
    }
    .vedio {
        display: none;
    }
    .page1 .hb {
        display: block;
        width: 100%;
    }
    .page4 {
        display: none;
    }
    .quick-menu {
        display: none;
    }
    h2 {
        padding: 20px 0;
        font-size: 24px;
    }
    /* page2 */
    .page2 li {
        position: relative;
        float: none;
        width: 100%;
        height: 160px;
    }
    .p2Content {
        padding: 50px 0;
        overflow: hidden;
    }
    .p2Content .icon {
        position: relative;
        width: 60px;
        height: 60px;
        margin: 0 15px;
    }
    .p2Content>section>div {
        display: none;
    }
    .pc1 .icon {
        float: left;
    }
    .pc1>section {
        text-align: left;
    }
    .pc2 .icon {
        float: right;
    }
    .pc2>section {
        text-align: right;
    }
    .p2Content .icon:after {
        display: none;
    }
    .p2Content h3 {
        margin-top: 0;
        margin-bottom: 0;
        line-height: 55px;
        font-size: 22px;
        font-weight: 300;
    }
    .p2Content p {
        margin-top: 5px;
        font-size: 16px;
    }
    .p2Explain {
        background: url('../img/industry_bj.jpg') repeat-y center top;
    }
    .p2Explain .bg {
        display: none;
    }
    .p2Explain>section {
        display: block;
    }
    .p2Explain .text {
        width: 100%;
        overflow: hidden;
    }
    .p2Explain .img {
        width: 80%;
        margin: 40px auto 30px;
    }
    .p2Explain h4 {
        margin-top: 30px;
        font-size: 24px;
    }
    .p2Explain p {
        line-height: 30px;
        margin-top: 10px;
        font-size: 16px;
    }
    .play {
        display: block;
    }
    .isShow {
        display: none;
    }
    .page3 {
        background: url(../img/ph.jpg) no-repeat 10% top;
        background-size: 160%;
    }
    .page3 img {
        display: none;
    }
    .page3>div {
        position: relative;
        top: 0%;
        left: 0%;
        padding: 50px 5% 0;
        color: #fff;
        overflow: hidden;
    }
    .page3 h5 {
        margin-bottom: 15px;
        font-size: 18px;
    }
    .page3 .circle:after {
        width: 5px;
        height: 5px;
        margin: 0 10px;
    }
    .page3 h6 {
        margin-bottom: 15px;
        font-size: 24px;
    }
    .page3 p {
        line-height: 20px;
        padding: 4px 0 4px 20px;
        text-indent: 0;
        font-size: 14px;
        background: url(../img/case_icon_s.png) no-repeat left 8px;
        background-size: 4%;
    }
    .page3 a {
        width: 100px;
        margin: 150px auto 80px;
        padding: 4px 0 5px;
        text-align: center;
        font-size: 14px;
    }
    .page3 a:hover {
        border: 1px solid #fff;
        background: transparent;
    }
}