.development-history {
			margin-top: 80px;
			margin-bottom: 135px;
			position: relative;
			height: 1067px;
			width: 1200px !important;
		}

		.development-history .tree {
			position: absolute;
			top: 0px;
			margin-left: 50%;
			transform: translateX(-50%);
			width: 1px;
			height: 1067px;
			background: rgba(255, 106, 33, 0.34);

		}

		.development-history .tree .tree-content {
			position: relative;
			width: 21px;
		}

		.development-history .tree .tree-content .span {
			width: 21px;
			height: 21px;
			background: rgba(255, 106, 33, 1);
			border-radius: 50%;
			opacity: 1;
			margin-left: -10px;
			border: 5px solid rgba(255, 222, 206, 1);

		}

		.development-history .tree .tree-content .margin1 {
			margin-top: 75px;
		}
		.development-history .tree .tree-content .margin2 {
			margin-top: 174px;
		}
		.development-history .tree .tree-content .margin3 {
			margin-top: 183px;
		}
		.development-history .tree .tree-content .margin4 {
			margin-top: 183px;
		}
		.development-history .tree .tree-content .margin5 {
			margin-top: 184px;
		}

		.history-content {
			width: 1200px;
			padding-top: 66px;
		}

		.history-content .row {
			margin-bottom: 30px;
		}

		.history-content .row .flex {
			display: flex;
			align-items: center;
			justify-content: center;
			flex-direction: column;
		}

		.history-content .row .col-md-6:nth-child(1) {
			text-align: right;
			padding-right: 40px;
		}

		.history-content .row .col-md-6:nth-child(2) {
			padding-left: 40px;
			box-sizing: border-box;
		}

		.history-content .row .col-md-6 .p {
			min-height: 26px;
			font-size: 14px;
			font-family: Microsoft YaHei;
			font-weight: 400;
			line-height: 25px;
			color: #919191;
			width: 100%;

		}

		.history-content .row .col-md-6 .desc {
			width: 100%;
			height: 26px;
			font-size: 20px;
			font-family: Microsoft YaHei;
			font-weight: bold;
			line-height: 26px;
			color: #000000;
			margin-top: 13px;
			margin-bottom: 21px;


		}

		.history-content .row .col-md-6 .year {
			width: 100%;
			height: 33px;
			font-size: 25px;
			font-family: Microsoft YaHei;
			font-weight: 400;
			line-height: 33px;
			color: #FF6A21;

		}