/* reset */
html, body, div, span, applet, object, iframe,
h1, h2, h3, h4, h5, h6, p, blockquote, pre,
a, abbr, acronym, address, big, cite, code,
del, dfn, em, img, ins, kbd, q, s, samp,
small, strike, strong, sub, sup, tt, var,
b, u, i, center,
dl, dt, dd, ol, ul, li,
fieldset, form, label, legend,
table, caption, tbody, tfoot, thead, tr, th, td,
article, aside, canvas, details, embed, 
figure, figcaption, footer, header, hgroup, 
menu, nav, output, ruby, section, summary,
time, mark, audio, video {
	margin: 0;
	padding: 0;
	border: 0;
	font-size: 100%;
	font: inherit;
	vertical-align: baseline;
}
/* HTML5 display-role reset for older browsers */
article, aside, details, figcaption, figure, 
footer, header, hgroup, menu, nav, section {
	display: block;
}
body {
	line-height: 1;
}
ol, ul {
	list-style: none;
}
blockquote, q {
	quotes: none;
}
blockquote:before, blockquote:after,
q:before, q:after {
	content: '';
	content: none;
}
table {
	border-collapse: collapse;
	border-spacing: 0;
}

/* baiyue */
html {
  font-family: 'PingFangSC-Regular', 'Helvetica Neue For Number', '-apple-system', BlinkMacSystemFont, 'Segoe UI', Roboto, 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Helvetica, Arial, 'sans-serif'
}

/* header */
.header {
  position: fixed;
  z-index: 2;
  top: 0;
  right: 0;
  left: 0;
  height: 64px;
  color: #fff;
  background: linear-gradient(to bottom, rgba(0, 0, 0, .4), rgba(0, 0, 0, 0));
}
.logo {
  position: absolute;
  top: 20px;
  left: 40px;
  bottom: 0;
  width: 200px;
  background: url('images/logo.png') left center no-repeat;
  background-size: auto 44px;
}
.menu {
  display: none;
  position: absolute;
  top: 0;
  right: 20px;
  bottom: 0;
  width: 80px;
  background: url('images/menu.svg') right center no-repeat;
  background-size: auto 28px;
}
.navs {
  position: absolute;
  top: 0;
  right: 40px;
  bottom: 0;
}
.nav-item {
  position: relative;
  display: inline-block;
  line-height: 64px;
  margin-left: 18px;
  cursor: pointer;
}
.nav-item:hover:after {
  position: absolute;
  content: '';
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: #fff;
}

/* banner */
.banner {
  position: relative;
  height: 700px;
}
.swiper-container, .swiper-wrapper, .swiper-slide {
  height: 100%;
}
.slide-1 {
  background: url('images/1.jpg') center center no-repeat;
  background-size: cover;
}
.slide-2 {
  background: url('images/2.jpg') center center no-repeat;
  background-size: cover;
}
.slide-3 {
  background: url('images/3.jpg') center center no-repeat;
  background-size: cover;
}
.slide-4 {
  background: url('images/4.jpg') center center no-repeat;
  background-size: cover;
}
.swiper-overlay {
  position: absolute;
  z-index: 1;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  background: rgba(0, 0, 0, .4);
}
.swiper-pagination-bullet {
  background: #fff;
  opacity: 1;
}
.banner-content {
  position: absolute;
  z-index: 1;
  top: 50%;
  left: 0;
  right: 0;
  color: #fff;
  text-align: center;
  -webkit-transform: translateY(-60%);
  -moz-transform: translateY(-60%);
  -ms-transform: translateY(-60%);
  -o-transform: translateY(-60%);
  transform: translateY(-60%);
}
#slogon {
  font-size: 44px;
  font-weight: bold;
}
.feature {
  margin-top: 20px;
}
.feature span {
  font-size: 18px;
  font-family: 'PingFangSC-light';
  font-weight: lighter;
  padding: 0 7px;
}
.intro-btn {
  margin: 30px auto 0;
  width: 140px;
  padding: 12px 0 12px 30px;
  border: 4px solid #fff;
  border-radius: 40px;
  background: url('images/play.svg') 20px center no-repeat;
  background-size: 40px auto;
  cursor: pointer;
}

/* section */
.section {
  padding: 80px 0;
  text-align: center;
}
.section:nth-child(even) {
  background: #f7f7f7;
}
.section-title {
  font-size: 28px;
  font-weight: bold;
}
.section-subtitle {
  font-size: 18px;
  font-family: optima;
  font-weight: bold;
  margin: 10px 0;
}
.section-content {
  width: 1200px;
  margin: 50px auto 0;
}

/* product */
.products {
  overflow: hidden;
}
.product-item {
  width: 20%;
  padding: 80px 20px 15px;
  float: left;
  min-height: 360px;
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  -ms-box-sizing: border-box;
  -o-box-sizing: border-box;
  box-sizing: border-box;
  transition: all .3s;
}
.product-item.item-1 {
  background: url('images/movie.svg') center 15px no-repeat;
  background-size: auto 40px;
}
.product-item.item-2 {
  background: url('images/mooc.svg') center 15px no-repeat;
  background-size: auto 40px;
}
.product-item.item-3 {
  background: url('images/weike.svg') center 15px no-repeat;
  background-size: auto 40px;
}
.product-item.item-4 {
  background: url('images/online.svg') center 15px no-repeat;
  background-size: auto 40px;
}
.product-item.item-5 {
  background: url('images/vr.svg') center 15px no-repeat;
  background-size: auto 40px;
}
.product-item:hover {
  border-radius: 10px;
  background-color: #f7f7f7;
}
.product-item .item-title {
  font-size: 20px;
  font-weight: bold;
}
.product-item .item-desc {
  text-align: left;
  margin-top: 20px;
  line-height: 1.5;
}

/* tech */
.techs {
  overflow: hidden;
}
.tech-item {
  position: relative;
  width: 50%;
  padding: 20px 20px 0 200px;
  float: left;
  height: 180px;
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  -ms-box-sizing: border-box;
  -o-box-sizing: border-box;
  box-sizing: border-box;
}
.tech-item .item-img {
  position: absolute;
  top: 20px;
  bottom: 24px;
  left: 20px;
  width: 160px;
  border-radius: 4px;
  background-position: center center;
  background-repeat: no-repeat;
  background-size: cover;
}
.tech-item.item-1 .item-img {
  background-image: url('images/flash.png');
}
.tech-item.item-2 .item-img {
  background-image: url('images/mg.png');
}
.tech-item.item-3 .item-img {
  background-image: url('images/3d.png');
}
.tech-item.item-4 .item-img {
  background-image: url('images/reality.png');
}
.tech-item .item-title {
  text-align: left;
  font-size: 20px;
  font-weight: bold;
}
.tech-item .item-desc {
  text-align: left;
  font-size: 15px;
  margin-top: 20px;
  line-height: 1.5;
}

/* service */
.services {
  overflow: hidden;
}
.service-item {
  position: relative;
  width: 20%;
  padding: 20px 20px 15px;
  float: left;
  min-height: 300px;
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  -ms-box-sizing: border-box;
  -o-box-sizing: border-box;
  box-sizing: border-box;
  transition: all .3s;
}
.service-item:after {
  position: absolute;
  content: '';
  top: 36px;
  right: -50%;
  left: 50%;
  height: 4px;
  margin-left: 50px;
  margin-right: 50px;
  background: #EF4245;
  border-radius: 2px;
}
.service-item:last-child:after {
  display: none;
}
.service-item .item-number {
  margin: 0 auto 20px;
  font-size: 28px;
  width: 40px;
  height: 40px;
  border-radius: 40px;
  color: #fff;
  text-align: center;
  line-height: 40px;
  background: #EF4245;
}
.service-item .item-title {
  font-size: 20px;
  font-weight: bold;
}
.service-item .item-desc {
  text-align: left;
  margin-top: 20px;
  line-height: 1.5;
}

/* course */
.courses {
  overflow: hidden;
}
.course-item {
  position: relative;
  float: left;
  width: 380px;
  height: 214px;
  margin: 0 30px 30px 0;
  cursor: pointer;
  background-position: center center;
  background-repeat: no-repeat;
  background-size: cover;
}
.course-item:nth-child(3n) {
  margin-right: 0;
}
.course-btn {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 60px;
  height: 60px;
  margin-left: -30px;
  margin-top: -30px;
  border-radius: 80px;
  background: rgba(0,0,0,.5)url(images/play.svg) center center no-repeat;
  background-size: 80px auto;
}
.course-1 {
  background-image: url('images/cssqjs.png');
}
.course-2 {
  background-image: url('images/jrxkcdx.png');
}
.course-3 {
  background-image: url('images/cy.png');
}
.course-4 {
  background-image: url('images/lgl.png');
}
.course-5 {
  background-image: url('images/lxsh.png');
}
.course-6 {
  background-image: url('images/mlfs.png');
}
.course-7 {
  background-image: url('images/tgxcp.png');
}
.course-8 {
  background-image: url('images/yxkjaqzygf.png');
}
.course-9 {
  background-image: url('images/ztsj.png');
}

/* partner */
.partners {
  overflow: hidden;
}
.partner-item {
  position: relative;
  float: left;
  width: 12%;
  height: 80px;
  margin: 0 0.25% 60px;
  background-position: center center;
  background-repeat: no-repeat;
  background-size: contain;
}
.partner-item.item-1 {
  background-image: url('images/cj.jpg');
}
.partner-item.item-2 {
  background-image: url('images/gb.jpg');
}
.partner-item.item-3 {
  background-image: url('images/jayy.jpg');
}
.partner-item.item-4 {
  background-image: url('images/jt.jpg');
}
.partner-item.item-5 {
  background-image: url('images/ky.jpg');
}
.partner-item.item-6 {
  background-image: url('images/ns.jpg');
}
.partner-item.item-7 {
  background-image: url('images/ntkf.jpg');
}
.partner-item.item-8 {
  background-image: url('images/qx.png');
}
.partner-item.item-9 {
  background-image: url('images/shkf.jpg');
}
.partner-item.item-10 {
  background-image: url('images/sq.png');
}
.partner-item.item-11 {
  background-image: url('images/starbucks.jpg');
}
.partner-item.item-12 {
  background-image: url('images/ts.jpg');
}
.partner-item.item-13 {
  background-image: url('images/xhyy.jpg');
}
.partner-item.item-14 {
  background-image: url('images/xj.jpg');
}
.partner-item.item-15 {
  background-image: url('images/xz.png');
}
.partner-item.item-16 {
  background-image: url('images/yf.jpg');
}

/* about us */
.about-content {
  padding: 15px 360px 15px 15px;
  min-height: 320px;
  background: url('images/logo3.png') right center no-repeat;
  background-size: 300px auto;
  text-align: left;
}
.about-title {
  font-size: 36px;
  font-weight: bold;
  margin-top: 40px;
}
.about-subtitle {
  font-size: 24px;
  margin-top: 30px;
  line-height: 32px;
}
.about-desc {
  margin-top: 50px;
}

/* contact us */
.contact-content {
  position: relative;
  padding: 15px 0 15px 700px;
  height: 336px;
  text-align: left;
}
.contact-map {
  position: absolute;
  top: 15px;
  bottom: 15px;
  left: 100px;
  width: 500px;
  cursor: pointer;
  background: url('images/map.jpg') center center no-repeat;
  background-size: 500px auto;
}
.contact-line {
  margin-bottom: 10px;
  padding: 15px 0 15px 50px;
  background-position: left center;
  background-repeat: no-repeat;
  background-size: 36px auto;
}
.line-address {
  background-image: url('images/address.svg');
}
.line-phone {
  background-image: url('images/phone.svg');
}
.line-email {
  background-image: url('images/email.svg');
}

/* footer */
.footer {
  text-align: center;
  height: 64px;
  line-height: 64px;
}

/* video */
.modal {
  position: fixed;
  z-index: -1;
  opacity: 0;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  transition: all .5s;
}
.modal.show {
  z-index: 5;
  opacity: 1;
}
.modal-mask {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  background: rgba(0, 0, 0, .7);
}
.modal-close {
  position: absolute;
  top: 40px;
  right: 40px;
  width: 50px;
  height: 50px;
  background: url('images/close.svg') center center no-repeat;
  background-size: 50px auto;
  cursor: pointer;
}
.modal-content {
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  text-align: center;
  -webkit-transform: translateY(-50%);
  -moz-transform: translateY(-50%);
  -ms-transform: translateY(-50%);
  -o-transform: translateY(-50%);
  transform: translateY(-50%);
}

@media screen and (max-width: 768px) {
  .logo {
    left: 20px;
    width: 100px;
  }
  .menu {
    display: block;
  }
  .header .navs {
    display: none;
  }
  .header.show-nav {
    height: auto;
    bottom: 0;
    background: rgba(0, 0, 0, .8);
  }
  .header.show-nav .logo {
    bottom: auto;
    height: 64px;
  }
  .header.show-nav .menu {
    bottom: auto;
    height: 64px;
  }
  .header.show-nav .navs {
    display: block;
    top: 64px;
    left: 0;
    right: 0;
  }
  .header.show-nav .nav-item {
    display: block;
    margin: 0 30px;
    text-align: center;
  }
  .banner {
    height: 300px;
  }
  .banner-content {
    -webkit-transform: translateY(-50%);
    -moz-transform: translateY(-50%);
    -ms-transform: translateY(-50%);
    -o-transform: translateY(-50%);
    transform: translateY(-50%);
  }
  #slogon {
    font-size: 24px;
    pointer-events: none;
  }
  .feature {
    margin-top: 10px;
    pointer-events: none;
  }
  .feature span {
    font-size: 14px;
  }
  .intro-btn {
    margin-top: 20px;
    width: 100px;
    padding: 8px 0 8px 20px;
    border: 3px solid #fff;
    border-radius: 40px;
    background: url(images/play.svg) 10px center no-repeat;
    background-size: 30px auto;
  }
  .section {
    padding: 40px;
  }
  .section-content {
    width: 100%;
    margin-top: 30px;
  }
  .product-item {
    width: 100%;
    float: none;
    min-height: 240px;
    padding: 80px 0 15px;
  }
  .tech-item {
    padding: 0;
    width: 100%;
    height: auto;
    float: none;
    text-align: center;
    margin-bottom: 50px;
  }
  .tech-item .item-img {
    position: relative;
    top: 0;
    left: 0;
    height: 138px;
    margin: 0 auto;
  }
  .tech-item .item-title {
    margin-top: 20px;
    text-align: center;
  }
  .service-item {
    width: 100%;
    padding: 20px 0 15px;
    float: none;
    min-height: 240px;
  }
  .service-item:after {
    display: none;
  }
  .course-item {
    width: 100%;
    height: auto;
    float: none;
    padding-bottom: 56.25%;
  }
  .partner-item {
    float: left;
    width: 24%;
    height: 60px;
    margin: 0 0.5% 30px;
  }
  .about-content {
    padding: 200px 0 0;
    min-height: auto;
    background: url(images/logo3.png) center top no-repeat;
    background-size: 200px auto;
  }
  .about-title {
    font-size: 24px;
    margin-top: 20px;
  }
  .about-subtitle {
    font-size: 16px;
  }
  .about-desc {
    font-size: 14px;
    line-height: 1.5;
    margin-top: 30px;
  }
  .contact-content {
    padding: 0;
    height: auto;
  }
  .contact-map {
    position: relative;
    width: 100%;
    padding-bottom: 67.3%;
    top: 0;
    left: 0;
    margin-bottom: 20px;
  }
  video {
    width: 100%;
  }
}