body, dl, dd, ul, ol, h1, h2, h3, h4, h5, h6, p, form, header, section, article, footer {
  margin: 0;
}

body, button, input, select, textarea {
  font: 12px/1.5 tahoma,'\5FAE\8F6F\96C5\9ED1',sans-serif;
}

h1, h2, h3, h4, h5, h6 {
  font-size: 100%;
}

em, b {
  font-style: normal;
}

a {
  text-decoration: none;
}

a:hover {
  text-decoration: none;
}

img {
  border: 0;
}

button, input, select, textarea {
  font-size: 100%;
  outline: none;
}

table {
  border-collapse: collapse;
  border-spacing: 0;
}

td, th, ul, ol {
  padding: 0;
  list-style: none;
}

.gray {
  -webkit-filter: grayscale(100%);
  -moz-filter: grayscale(100%);
  -ms-filter: grayscale(100%);
  -o-filter: grayscale(100%);
  filter: grayscale(100%);
  filter: gray;
  pointer-events: none;
}

a:not(.gray):hover {
  -webkit-filter: brightness(1.2);
  filter: brightness(1.2);
}

.clearfix:after {
  visibility: hidden;
  display: block;
  font-size: 0;
  content: " ";
  clear: both;
  height: 0;
}

.clearfix {
  *zoom: 1;
}

body {
  min-width: 1300px;
  font-family: 'Microsoft Yahei';
  background: #46aefb;
}

@font-face {
  font-family: 'hycsj';
  src: url("hycsj.ttf");
}

@font-face {
  font-family: 'hyzsj';
  src: url("hyzsj.ttf");
}

@font-face {
  font-family: 'hyqh1';
  src: url("hyqh1.ttf");
}

@font-face {
  font-family: 'hyqh';
  src: url("hyqh.ttf");
}

.g-wrap {
  max-width: 1920px;
  margin: 0 auto;
}

.header {
  background: url(../img/header.jpg) no-repeat top center;
  height: 1072px;
  width: 100%;
  position: relative;
}

.header video {
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
  object-fit: cover;
}

.header .logo {
  background: url(../img/logo.png) no-repeat top center;
  width: 337px;
  height: 161px;
  display: block;
  position: absolute;
  top: 30px;
  left: 30px;
  z-index: 2;
}

.main {
  background: url(../img/bg1.jpg) no-repeat top center;
  padding-bottom: 100px;
  box-sizing: border-box;
  margin-top: -5px;
  overflow: hidden;
}

.main2 {
  background: url(../img/bg2.jpg) no-repeat top center;
  height: 5228px;
}

.main3 {
  background: url(../img/bg3.jpg) no-repeat top center;
  height: 6653px;
}

.tab-box {
  font-size: 0;
  text-align: center;
  margin-top: 25px;
}

.tab-box a {
  display: inline-block;
  vertical-align: top;
  width: 203px;
  height: 203px;
  background-size: 100% 100%;
}

.tab-box a + a {
  margin-left: 15px;
}

.tab-box .tab1 {
  background-image: url(../img/tab1.png);
  margin-top: 45px;
}

.tab-box .tab1.on, .tab-box .tab1:hover {
  background-image: url(../img/tab1-on.png);
}

.tab-box .tab2 {
  background-image: url(../img/tab2.png);
}

.tab-box .tab2.on, .tab-box .tab2:hover {
  background-image: url(../img/tab2-on.png);
}

.tab-box .tab3 {
  background-image: url(../img/tab3.png);
  margin-top: 45px;
}

.tab-box .tab3.on, .tab-box .tab3:hover {
  background-image: url(../img/tab3-on.png);
}

.tab-box .tab4 {
  background-image: url(../img/tab4.png);
  margin-top: 110px;
}

.tab-box .tab4.on, .tab-box .tab4:hover {
  background-image: url(../img/tab4-on.png);
}

.tab-box .tab5 {
  background-image: url(../img/tab5.png);
}

.tab-box .tab5.on, .tab-box .tab5:hover {
  background-image: url(../img/tab5-on.png);
}

.part {
  width: 1300px;
  margin: 0 auto;
}

.title {
  margin: 0 auto;
}