html_css_demo/css/86.css

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/* 引入网络字体Poppins */
@import url("http://fonts.googleapis.com/css?family=Poppins:200,300,400,500,600,700,800,900&display=swap");
*{
margin: 0;
padding: 0;
box-sizing: border-box;
font-family: "Poppins";
}
body{
/* 默认最小高度2屏 */
min-height: 200vh;
background-color: #000;
}
header{
/* 固定定位 */
position: fixed;
top: 0;
left: 0;
width: 100%;
/* 弹性布局 */
display: flex;
/* 将元素靠边对齐 */
justify-content: space-between;
align-items: center;
padding: 40px 100px;
z-index: 1;
/* 动画过渡 */
transition: 0.6s;
}
header .logo{
font-size: 32px;
color: #fff;
font-weight: 700;
text-decoration: none;
/* 转大写 */
text-transform: uppercase;
/* 字间距 */
letter-spacing: 2px;
transition: 0.6s;
}
header ul{
display: flex;
justify-content: center;
align-items: center;
}
header ul li{
list-style: none;
}
header ul li a{
margin: 0 15px;
text-decoration: none;
color: #fff;
font-weight: 500;
letter-spacing: 2px;
transition: 0.6s;
}
.banner1{
position: relative;
width: 100%;
height: 100vh;
background: url("../images/car1.jpg") no-repeat;
/* 保持原有尺寸比例,裁切长边 */
background-size: cover;
/* 图片定位正中间 */
background-position: center center;
}
.banner2{
position: relative;
width: 100%;
height: 100vh;
background: url("../images/car2.jpg") no-repeat;
background-size: cover;
background-position: center center;
}
/* 鼠标滚动后,改变导航栏样式 */
header.sticky{
padding: 6px 100px;
background-color: #fff;
}
header.sticky .logo,
header.sticky ul li a{
color: #000;
}