html部分：
<div class="buttons">
<button class="btn-hover color-1">BUTTON</button>
<button class="btn-hover color-2">BUTTON</button>
<button class="btn-hover color-3">BUTTON</button>
<button class="btn-hover color-4">BUTTON</button>
<button class="btn-hover color-5">BUTTON</button>
<button class="btn-hover color-6">BUTTON</button>
<button class="btn-hover color-7">BUTTON</button>
<button class="btn-hover color-8">BUTTON</button>
<button class="btn-hover color-9">BUTTON</button>
<button class="btn-hover color-10">BUTTON</button>
<button class="btn-hover color-11">BUTTON</button>
</div>
css部分：
* {
box-sizing: border-box;
}
body{background-color: #1F1F1F;overflow: hidden}
.buttons {
margin: 10%;
text-align: center;
}
.btn-hover {
width: 200px;
font-size: 16px;
font-weight: 600;
color: #fff;
cursor: pointer;
margin: 20px;
height: 55px;
text-align:center;
border: none;
background-size: 300% 100%;
border-radius: 50px;
transition: all .4s ease-in-out;
}
.btn-hover:hover {
background-position: 100% 0;
transition: all .4s ease-in-out;
}
.btn-hover:focus {
outline: none;
}
.btn-hover.color-1 {
background-image: linear-gradient(to right, #25aae1, #40e495, #30dd8a, #2bb673);
box-shadow: 0 4px 15px 0 rgba(49, 196, 190, 0.75);
}
.btn-hover.color-2 {
background-image: linear-gradient(to right, #f5ce62, #e43603, #fa7199, #e85a19);
box-shadow: 0 4px 15px 0 rgba(229, 66, 10, 0.75);
}
.btn-hover.color-3 {
background-image: linear-gradient(to right, #667eea, #764ba2, #6B8DD6, #8E37D7);
box-shadow: 0 4px 15px 0 rgba(116, 79, 168, 0.75);
}
.btn-hover.color-4 {
background-image: linear-gradient(to right, #fc6076, #ff9a44, #ef9d43, #e75516);
box-shadow: 0 4px 15px 0 rgba(252, 104, 110, 0.75);
}
.btn-hover.color-5 {
background-image: linear-gradient(to right, #0ba360, #3cba92, #30dd8a, #2bb673);
box-shadow: 0 4px 15px 0 rgba(23, 168, 108, 0.75);
}
.btn-hover.color-6 {
background-image: linear-gradient(to right, #009245, #FCEE21, #00A8C5, #D9E021);
box-shadow: 0 4px 15px 0 rgba(83, 176, 57, 0.75);
}
.btn-hover.color-7 {
background-image: linear-gradient(to right, #6253e1, #852D91, #A3A1FF, #F24645);
box-shadow: 0 4px 15px 0 rgba(126, 52, 161, 0.75);
}
.btn-hover.color-8 {
background-image: linear-gradient(to right, #29323c, #485563, #2b5876, #4e4376);
box-shadow: 0 4px 15px 0 rgba(45, 54, 65, 0.75);
}
.btn-hover.color-9 {
background-image: linear-gradient(to right, #25aae1, #4481eb, #04befe, #3f86ed);
box-shadow: 0 4px 15px 0 rgba(65, 132, 234, 0.75);
}
.btn-hover.color-10 {
background-image: linear-gradient(to right, #ed6ea0, #ec8c69, #f7186a , #FBB03B);
box-shadow: 0 4px 15px 0 rgba(236, 116, 149, 0.75);
}
.btn-hover.color-11 {
background-image: linear-gradient(to right, #eb3941, #f15e64, #e14e53, #e2373f); box-shadow: 0 5px 15px rgba(242, 97, 103, .4);
}