body{
  background-color: black;
  margin: 0px;
}

@font-face {
	font-family: gotham;
	src: url(../../Gotham-Book.ttf);
}

@font-face {
	font-family: pingfangSC;
	src: url(../../PingFang-SC-Regular.ttf);
}

.header {
    width:100%;
    background-color: transparent;
    height: 70px;
    z-index: 1;
    position:fixed; top:0; left:0; right:0;
}

@media screen and ( max-width:30em )
{
	body { padding:0; }

	.header
	{
		padding:0;
		position:static; top:auto; left:auto; right:auto; z-index:0;
	}
}

.logo {
	width: 210px;
	height: 70px;
	overflow: hidden;
	position: absolute;
	background-color: transparent;
	top: 37px;
	left: 90px;
}

.logo img {
	width: 100%;
	height: 100%;
}

/* 首页导航窗口背景样式 */
.hl_nav{
  background-color: transparent;
  position: absolute;
  /*margin: auto;*/
  /* 居中 */
  left: 50%;
  transform: translate(-50%, 0);
  min-width: 200px;
  width: 927px;
  height: 280px;
  pointer-events:none;
}

.hl_nav a{
    /*display: block;*/
    text-decoration: none;
}

/* 导航首选项样式
.hl_nav ul > li {
  float: left;
  position: relative;
}
 */

/* 导航窗口单项样式 */
.nav_list{
  list-style: none;
  margin-left: 669px;
  margin-top: 38px;
  padding: 0;
  pointer-events: auto;
}

/* 下拉窗口样式*/
.down_list{
  list-style: none;
  /*margin-top: 47px;*/
  margin-left: -130px;
  text-align: right;
  width: 200px;
  padding: 0;  
}

/* 查看全部样式 */
.last_ul{
  list-style: none;
  margin-left: 50px;
  width: 400px;
  padding: 0; 
}

.nav_list, .active {
  float: left;
}

.last_ul, .last_ul>li {
  float: left;
}

/* 导航窗口所有项目选项的初始颜色和字体 */
.nav_head {
  /*display: block;*/
  /*padding: 10px 20px;*/
  padding-right: 20px;
  width: 50px;
  height: 9px;
  /*line-height: 1.2em;*/
  color: rgba(255, 255, 255, 1);
  letter-spacing: 0.03px;
  font-size: 9px;
  font-family: gotham;
}

.active:hover .nav_head{
    font-size: 15px;
}

/* 下拉菜单文字颜色 */
.item_list a{
  /*display: block;*/
  /*padding: 10px 20px;*/
  /*line-height: 1.2em;*/
  color: rgba(156, 156, 156, 1);
  letter-spacing: 0.03px;
  font-size: 7px;
  font-family: pingfangSC;
}

.last_li{
  width: 150px;
  text-align: right;
  padding-right: 30px;
}

.last_li a{
  color: rgba(156, 156, 156, 1);
  letter-spacing: 0.03px;
  font-size: 7px;
  font-family: pingfangSC;
}

.last_li_all a{
  color: rgba(156, 156, 156, 1);
  letter-spacing: 0.03px;
  font-size: 6px;
  font-family: pingfangSC;
}

/* 下拉菜单鼠标移动变色变大 */
.item_list a:hover {
  color: rgba(0, 0, 0, 1);
  font-size: 15px;
}

.last_li a:hover {
  color: rgba(0, 0, 0, 1);
  font-size: 15px;
}

.last_li_all a:hover {
  font-size: 15px;
  color: rgba(0, 0, 0, 1);
  text-decoration: underline;
}

/* 下拉菜单文字颜色 */
/*.last_item a{
  display: block;
  padding: 10px 20px;
  line-height: 1.2em;
  color: rgba(156, 156, 156, 1);
  letter-spacing: 0.03px;
  font-size: 7px;
  font-family:"PingFangSC";
}*/

/*#all_item {
  font-size: 6px;
  color: rgba(156, 156, 156, 1);
  margin-left: 750px;
  letter-spacing: 0.03px;
  font-family:"PingFangSC";
}*/

/* 导航窗口移动变白 */
/*.active:hover ~ .hl_nav{
  text-decoration: none;
  background: rgba(255, 255, 255, 1);transition:all .7s ease 0s;
}*/

/* 弹出下拉窗口导航变色 */
.nav_list:hover .nav_head{
  text-decoration: none;
  color: rgba(0, 0, 0, 1);/*transition:all .7s ease 0s;*/
}

/* 下拉窗口Fade In and Out */
.hl_nav ul > li:hover ul{
  visibility: visible;
  opacity: 1;
  filter: alpha(opacity=100);
}
.hl_nav li ul{
  position: absolute;
  z-index: 1;
  visibility: hidden;
  opacity: 0;
  filter: alpha(opacity=0);
  -webkit-transition: 500ms ease;
  -moz-transition: 500ms ease;
  -o-transition: 500ms ease;
  transition: 500ms ease;
}

.nav_bg {
  margin: 0;
  padding: 0;
  border: 0;
}

.nav_bg img{
	width: 100%;
  height: 100%;
  overflow: hidden;
	margin: 0;
	padding: 0;
	border: 0;
  display: block;
}

.prj_title {
	margin: 0;
	padding: 0;
	border: 0;
	width: 100%;
	height: 230px;
	overflow:hidden;
	background-color: white;
	text-align:center;
}

.prj_title p {
	margin-top: 69px;
  color: rgba(0, 0, 0, 1);
  letter-spacing: 1.5px;
  font-size: 18px;
}

.item_list_div {
	width: 100%;
	overflow: hidden;
}

.item_list_ul {
	list-style: none;
	padding: 0;
	overflow: hidden;
}

.item_div {
  width: 100%;
  margin: 0px;
  border: 0px;
  padding: 0px;
  display: grid;
  grid-template-columns: 33.33% 33.33% 33.33%
}

.item_img img {
  width: 100%;
  height: 100%;
  border: rgba(146, 143, 44, 1) 1px solid;
  display: block;
}