* {
	box-sizing: border-box;
}

body {
	/* width: 1100px; */
	font-family: Arial;
	padding: 10px;
	background: #f1f1f1;
}

/* 头部标题 */
.header {
	/* text-align: center; */
	background: #ffffff;
}

.header h1 {
	font-size: 60px;
	color: #13780d;

}

.qqq {
	transition: all 0.2s linear;
}

.qqq:hover {

	margin-left: 120px;
	transform: scale(1.5);
	transition: all 0.2s linear;
}

/* 导航条 */
.topnav {
	overflow: hidden;
	background-color: #9a9a9a;
}

/* 导航条链接 */
.topnav a {
	float: left;
	display: block;
	color: #ffffff;
	text-align: center;
	padding: 14px 16px;
	text-decoration: none;
}

/* 链接颜色修改 */
.topnav a:hover {
	background-color: #13780d;
	color: black;
}

/* 创建两列 */
/* Left column */
.leftcolumn {
	float: left;
	width: 75%;
	/* text-indent: 2em;*/
}

/* 右侧栏 */
.rightcolumn {
	float: left;
	width: 50%;
	background-color: #f1f1f1;
	padding-left: 20px;
}

/* 图像部分 */
.fakeimg {
	background-color: #ffffff;
	width: 100%;

}

/* 文章卡片效果 */
.card {
	background-color: white;
	padding: 25px;
	margin-top: 20px;
}


/* 列后面清除浮动 */
.row:after {
	content: "";
	display: table;
	clear: both;
}

/* 底部 */
.footer {
	/* width: 1100px; */
	height: 150px;
	padding: -10px;
	text-align: center;
	background: #9a9a9a;
	margin-top: 17px;
	/* height: 240px; */
}

.bottom-layout {
	width: 1000px;
	height: 100px;
	align-items: center;
	margin: 0 auto;
	display: flex;
	/*border: 1px solid #13780d;*/
	justify-content: space-between;
}

.bottom_layer {
	margin-top: 20px;
}

.content {
	border: 1px solid #9a9a9a;
	width: 300px;
	height: 100px;
}


/* 响应式布局 - 屏幕尺寸小于 800px 时，两列布局改为上下布局 */
@media screen and (max-width: 800px) {

	.leftcolumn,
	.rightcolumn {
		width: 100%;
		padding: 0;
	}
}

/* 响应式布局 -屏幕尺寸小于 400px 时，导航等布局改为上下布局 */
@media screen and (max-width: 400px) {
	.topnav a {
		float: none;
		width: 100%;
	}
}