jQuery火箭图标返回顶部代码

body {
    font-size: 15px;
    color:#333;
    background:#fff;
    font-family: "Courier New", Helvetica, Arial, "PingFang SC", "Microsoft YaHei", "WenQuanYi Micro Hei", "tohoma,sans-serif";
    margin: 0;
    padding: 10%;
}
h1 {
    font-size: 2.2em;
    font-weight: 700;
    line-height: 1.1;
    padding-top: 16px;
    margin-bottom: 4px;
}
h2, h3, h4, h5, h6 {
    line-height: 1.5em;
    margin-top: 2.2em;
    margin-bottom: 4px;
}
h2 {
    font-size: 1.4em;
    margin: 40px 10px 20px 0;
    padding-left: 9px;
    border-left: 6px solid #ff7e79;
    font-weight: 700;
    line-height: 1.4;
}
h3 {
    font-weight: 700;
    font-size: 1.2em;
    line-height: 1.4;
    margin: 10px 0 5px;
    padding-top: 10px;
}
h4 {
    font-weight: 700;
    text-transform: uppercase;
    font-size: 1.1em;
    line-height: 1.4;
    margin: 10px 0 5px;
    padding-top: 10px
}
h5, h6 {
    font-size: .9em;
}
h5 {
    font-weight: bold;
    text-transform: uppercase;
}
h6 {
    font-weight: normal;
    color: #AAA;
}
img {
    width: 100%;
    border-radius: 5px;
    display: block;
    margin-bottom: 15px;
    height: auto;
}
dl, ol, ul {
    margin-top: 12px;
    margin-bottom: 20px;
    padding-left: 5%;
    line-height: 1.8;
}
p {
    margin: 0 0 20px;
    padding: 0;
    line-height: 1.8;
}
a {
    color: #f22f27;
    text-decoration: none;
}
a:hover {
    color: #f55852;
    text-decoration: underline;
}
a:focus {
    outline-offset: -2px;
}
blockquote {
    font-size: 1em;
    font-style: normal;
    padding: 30px 38px;
    margin: 0 0 15px;
    position: relative;
    line-height: 1.8;
    text-indent: 0;
    border: none;
    color: #888;
}
blockquote:before {
    content:">>";
    left: 12px;
    top: 0;
    color: #E0E0E0;
    font-size: 4em;
    font-family: "Courier New", Arial, serif;
    line-height: 1em;
    font-weight: 700;
    position: absolute;
}
blockquote:after {
    content:"<<";
    right: 12px;
    bottom: -26px;
    color: #E0E0E0;
    font-size: 4em;
    font-family: "Courier New", Arial, serif;
    line-height: 1em;
    font-weight: 700;
    position: absolute;
    bottom: -31px;
}
strong, dfn {
    font-weight: 700;
}
em, dfn {
    font-style: italic;
    font-weight: 400;
}
del {
    text-decoration: line-through;
}
/*code {font-size:90%;}*/

/*pre {text-align:left; overflow-x: scroll; color: #257fa0; background: #f6f6f6; padding: 10pt 15pt; border-radius: 3px; border: solid 1px #e2e2e2;}*/
 pre {
    margin: 0 0 10px;
    font-size: 13px;
    line-height: 1.42857;
    word-break: break-all;
    word-wrap: break-word;
    border-radius: 4px;
    white-space: pre-wrap;
    display: block;
    background: #f8f8f8;
    padding: 10px 20px;
    border: none;
    margin-bottom: 25px;
    color: #666;
    font-family: "Courier New", sans-serif;
}
code {
    color: #c7254e;
    background-color: #f9f2f4;
    border-radius: 4px;
    font-family: "Courier New", Menlo, Monaco, Consolas, monospace;
    padding: 2px 4px;
    font-size: 90%;
}
p > code {
    color: #c7264e;
    background-color: #f9f2f4;
    font-size: .95em;
    border-radius: 3px;
    -moz-border-radius: 3px;
    -webkit-border-radius: 3px;
}
figure {
    margin: 1em 0;
}
figcaption {
    font-size: 0.75em;
    padding:0.5em 2em;
    margin-bottom: 2em;
}
figure img {
    margin-bottom: 0px;
}
hr {
    margin-top: 20px;
    margin-bottom: 20px;
    border: 0;
    border-top: 1px solid #eee;
}
ol p, ul p {
    margin-bottom: 0px;
}
li {
    margin-bottom: 0.75em;
    margin-top: 0.75em;
}
ol#footnotes {
    font-size: 0.95em;
    padding-top: 1em;
    margin-top: 1em;
    margin-left: 0;
    border-top: 1px solid #eaeaea;
    counter-reset: footer-counter;
    list-style: none;
    color: #555;
    padding-left: 5%;
    margin: 20px 0;
}
ol#footnotes li {
    margin-bottom: 10px;
    margin-left: 16px;
    font-weight: 400;
    line-height: 2;
    list-style-type: none;
}
ol#footnotes li:before {
    content: counter(footer-counter)". ";
    counter-increment: footer-counter;
    font-weight: 800;
    font-size: .95em;
}
@keyframes highfade {
    0% {
        background-color: none;
    }
    20% {
        background-color: yellow;
    }
    100% {
        background-color: none;
    }
}
@-webkit-keyframes highfade {
    0% {
        background-color: none;
    }
    20% {
        background-color: yellow;
    }
    100% {
        background-color: none;
    }
}
a:target, ol#footnotes li:target, sup a:target {
    animation-name: highfade;
    animation-duration: 2s;
    animation-iteration-count: 1;
    animation-timing-function: ease-in-out;
    -webkit-animation-name: highfade;
    -webkit-animation-duration: 2s;
    -webkit-animation-iteration-count: 1;
    -webkit-animation-timing-function: ease-in-out;
}
a:target {
    border:0;
    outline: 0;
}
animation-iteration-count: 1;
 -webkit-animation-timing-function: ease-in-out;

}
a:target {
    border:0;
    outline: 0;
}
tion-iteration-count: 1;
 -webkit-animation-timing-function: ease-in-out;

}
a:target {
    border:0;
    outline: 0;
}

该样式非博主自创而是抄自网络。做个记录以备修改；