Html
    Css
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body {
	font-family:'华文仿宋';
	font-size:20px;
	font-weight:300;
	overflow-x:hidden;
	font-weight:bold;
}
.cb-slideshow-text-container {
	height:100vh;
	display:flex;
	align-items:center;
}
.tm-content {
	z-index:-9999;
}
.form-control::-webkit-input-placeholder {
	/* Chrome/Opera/Safari */
  color:white;
}
.form-control:-ms-input-placeholder {
	/* IE 10+ */
  color:white;
}
.form-control::placeholder {
	color:white;
}
.form-control {
	color:#FFFFFF;
	border-radius:.5rem;
	background-color:transparent;
	border:1px solid #FFFFFF;
	padding-top:10px;
	padding-bottom:10px;
	font-size:1.4rem;
	font-weight:300;
	padding:0.75rem 1.2rem;
}
.form-section {
	color:#FFFFFF;
	background-color:transparent;
	margin-bottom:100px;
}
.fa {
	color:#FFFFFF;
}
/* Animation */
.cb-slideshow,.cb-slideshow:after {
	position:fixed;
	width:100%;
	height:100%;
	top:0px;
	left:0px;
	z-index:-9999;
}
.cb-slideshow li {
	width:100%;
	height:100%;
	position:absolute;
	top:0px;
	left:0px;
	color:transparent;
	background-size:cover;
	background-position:50% 50%;
	background-repeat:none;
	opacity:0;
	z-index:-9999;
	-webkit-backface-visibility:hidden;
	-webkit-animation:imageAnimation 72s linear infinite 0s;
	-moz-animation:imageAnimation 72s linear infinite 0s;
	-o-animation:imageAnimation 72s linear infinite 0s;
	-ms-animation:imageAnimation 72s linear infinite 0s;
	animation:imageAnimation 72s linear infinite 0s;
}
.cb-slideshow li:nth-child(1) {
	background-image:url(https://picsum.photos/id/260/1024/768)
}
.cb-slideshow li:nth-child(2) {
	background-image:url(https://picsum.photos/id/261/1024/768);
	-webkit-animation-delay:12s;
	-moz-animation-delay:12s;
	-o-animation-delay:12s;
	-ms-animation-delay:12s;
	animation-delay:12s;
}
.cb-slideshow li:nth-child(3) {
	background-image:url(https://picsum.photos/id/262/1024/768); 
	-webkit-animation-delay:24s;
	-moz-animation-delay:24s;
	-o-animation-delay:24s;
	-ms-animation-delay:24s;
	animation-delay:24s;
}
.cb-slideshow li:nth-child(4) {
	background-image:url();
	animation-delay:36s;
}
.cb-slideshow li:nth-child(5) {
	background-image:url();
	animation-delay:48s;
}
.cb-slideshow li:nth-child(6) {
	background-image:url();
	animation-delay:60s;
}
@keyframes imageAnimation {
	0% {
	opacity:0;
	animation-timing-function:ease-in;
}
8% {
	opacity:1;
	transform:scale(1.15);
	animation-timing-function:ease-out;
}
17% {
	opacity:1;
	transform:scale(1.20);
}
25% {
	opacity:0;
	transform:scale(1.40);
}
100% {
	opacity:0
}
}@media screen and (max-width:1140px) {
	.cb-slideshow li div h3 {
	font-size:140px
}
}@media screen and (max-width:600px) {
	.cb-slideshow li div h3 {
	font-size:80px
}
.tm-content {
	margin-top:80px;
}
}@media screen and (max-width:576px) {
	.cb-slideshow li div h3 {
	font-size:80px
}
.tm-btn-subscribe {
	margin-top:20px;
}
}border-bottom:0}address {
	margin-bottom:1rem;
	font-style:normal;
	line-height:inherit
}
dl,ol,ul {
	margin-top:0;
	margin-bottom:1rem
}
ol ol,ol ul,ul ol,ul ul {
	margin-bottom:0
}
dt {
	font-weight:700
}
dd {
	margin-bottom:.5rem;
	margin-left:0
}
blockquote {
	margin:0 0 1rem
}
dfn {
	font-style:italic
}
b,strong {
	font-weight:bolder
}
small {
	font-size:80%
}
sub,sup {
	position:relative;
	font-size:75%;
	line-height:0;
	vertical-align:baseline
}

                        
↑上面代码改变,会自动显示代码结果 jQuery调用版本:1.11.3
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css网站背景渐变切换效果

更新时间:2020-08-04 11:52:05

.cb-slideshow li:nth-child(5) {background-image: url();}

将图片地址放入url(   )中,4,5,6图片请自行添加。

2.将css引入,html中加入

<ul class="cb-slideshow">
    <li></li>
    <li></li>
    <li></li>
    <li></li>
    <li></li>
    <li></li>
</ul>


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