以下是 css3 3d信封翻转效果特效代码 的示例演示效果:
部分效果截图:
HTML代码(index.html):
<!DOCTYPE html>
<html class="no-js" lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>css3 3d信封翻转效果</title>
<script src="js/modernizr.js" type="text/javascript" charset="utf-8"></script>
<!--[if IE 8]>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.0/jquery.min.js"></script>
<script>
$(document).ready(function(){
$("#contact").addClass("target");
$("#flip2back, #close").click(function(e){
$(".target").removeClass("target");
e.preventDefault();
});
$("#open, #flip").click(function(e){
var $anchor = $(this);
$($anchor.attr('href')).addClass("target");
e.preventDefault();
});
});
</script>
<![endif]-->
<link rel="stylesheet" href="stylesheets/style.css">
<!--<link href='http://fonts.googleapis.com/css?family=Satisfy' rel='stylesheet' type='text/css'>-->
</head>
<body>
<section class="container" id="contact" >
<form class="flip">
<div class="front">
<h2>Contact info</h2>
<p>13 bis rue Peps</p>
<p>75004 Paris France</p>
<a id="flip2back" href="#">Drop me a line !</a>
</div>
<div id="content" class="back">
<div id="letter">
<div class="container">
<div class="flip">
<div class="front"></div>
<div class="back">
You'd like us to work for you or you're here to
say hello ? Don't hesitate - just drop us a
line. You'll hear back from us soon. Thanks.
<a id="close" href="#">Close</a>
</div>
</div>
</div>
<textarea class="required" id="message" name="message" placeholder="Your message"></textarea>
<input type="submit" class="submit" value="Send" />
</div>
<div id="top">
<a id="flip" href="#contact">Flip</a>
</div>
<div id="lid" class="container">
<div class="flip">
<div class="front">
<div>
<label for="name">Your name :</label>
<input type="text" id="name" name="name">
</div>
<div>
<label for="mail">Your email :</label>
<input type="text" id="mail" name="mail" >
</div>
<a id="open" href="#content">Open</a>
</div>
<div class="back"></div>
</div>
</div>
</div>
</form>
</section>
</body>
</html>
JS代码(modernizr.js):
/* Modernizr 2.6.2 (Custom Build) | MIT & BSD * Build:http://modernizr.com/download/#-csstransforms3d-shiv-cssclasses-teststyles-testprop-testallprops-prefixes-domprefixes-load */
;
window.Modernizr=function(a,b,c){
function z(a){
j.cssText=a}
function A(a,b){
return z(m.join(a+";
")+(b||""))}
function B(a,b){
return typeof a===b}
function C(a,b){
return!!~(""+a).indexOf(b)}
function D(a,b){
for(var d in a){
var e=a[d];
if(!C(e,"-")&&j[e]!==c)return b=="pfx"?e:!0}
return!1}
function E(a,b,d){
for(var e in a){
var f=b[a[e]];
if(f!==c)return d===!1?a[e]:B(f,"function")?f.bind(d||b):f}
return!1}
function F(a,b,c){
var d=a.charAt(0).toUpperCase()+a.slice(1),e=(a+" "+o.join(d+" ")+d).split(" ");
return B(b,"string")||B(b,"undefined")?D(e,b):(e=(a+" "+p.join(d+" ")+d).split(" "),E(e,b,c))}
var d="2.6.2",e={
}
,f=!0,g=b.documentElement,h="modernizr",i=b.createElement(h),j=i.style,k,l={
}
.toString,m=" -webkit- -moz- -o- -ms- ".split(" "),n="Webkit Moz O ms",o=n.split(" "),p=n.toLowerCase().split(" "),q={
}
,r={
}
,s={
}
,t=[],u=t.slice,v,w=function(a,c,d,e){
var f,i,j,k,l=b.createElement("div"),m=b.body,n=m||b.createElement("body");
if(parseInt(d,10))while(d--)j=b.createElement("div"),j.id=e?e[d]:h+(d+1),l.appendChild(j);
return f=["­
",'<style id="s',h,'">',a,"</style>"].join(""),l.id=h,(m?l:n).innerHTML+=f,n.appendChild(l),m||(n.style.background="",n.style.overflow="hidden",k=g.style.overflow,g.style.overflow="hidden",g.appendChild(n)),i=c(l,a),m?l.parentNode.removeChild(l):(n.parentNode.removeChild(n),g.style.overflow=k),!!i}
,x={
}
.hasOwnProperty,y;
!B(x,"undefined")&&!B(x.call,"undefined")?y=function(a,b){
return x.call(a,b)}
:y=function(a,b){
return b in a&&B(a.constructor.prototype[b],"undefined")}
,Function.prototype.bind||(Function.prototype.bind=function(b){
var c=this;
if(typeof c!="function")throw new TypeError;
var d=u.call(arguments,1),e=function(){
if(this instanceof e){
var a=function(){
}
;
a.prototype=c.prototype;
var f=new a,g=c.apply(f,d.concat(u.call(arguments)));
return Object(g)===g?g:f}
return c.apply(b,d.concat(u.call(arguments)))}
;
return e}
),q.csstransforms3d=function(){
var a=!!F("perspective");
return a&&"webkitPerspective"in g.style&&w("@media (transform-3d),(-webkit-transform-3d){
#modernizr{
left:9px;
position:absolute;
height:3px;
}
}
",function(b,c){
a=b.offsetLeft===9&&b.offsetHeight===3}
),a}
;
for(var G in q)y(q,G)&&(v=G.toLowerCase(),e[v]=q[G](),t.push((e[v]?"":"no-")+v));
return e.addTest=function(a,b){
if(typeof a=="object")for(var d in a)y(a,d)&&e.addTest(d,a[d]);
else{
a=a.toLowerCase();
if(e[a]!==c)return e;
b=typeof b=="function"?b():b,typeof f!="undefined"&&f&&(g.className+=" "+(b?"":"no-")+a),e[a]=b}
return e}
,z(""),i=k=null,function(a,b){
function k(a,b){
var c=a.createElement("p"),d=a.getElementsByTagName("head")[0]||a.documentElement;
return c.innerHTML="x<style>"+b+"</style>",d.insertBefore(c.lastChild,d.firstChild)}
function l(){
var a=r.elements;
return typeof a=="string"?a.split(" "):a}
function m(a){
var b=i[a[g]];
return b||(b={
}
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function n(a,c,f){
c||(c=b);
if(j)return c.createElement(a);
f||(f=m(c));
var g;
return f.cache[a]?g=f.cache[a].cloneNode():e.test(a)?g=(f.cache[a]=f.createElem(a)).cloneNode():g=f.createElem(a),g.canHaveChildren&&!d.test(a)?f.frag.appendChild(g):g}
function o(a,c){
a||(a=b);
if(j)return a.createDocumentFragment();
c=c||m(a);
var d=c.frag.cloneNode(),e=0,f=l(),g=f.length;
for(;
e<g;
e++)d.createElement(f[e]);
return d}
function p(a,b){
b.cache||(b.cache={
}
,b.createElem=a.createElement,b.createFrag=a.createDocumentFragment,b.frag=b.createFrag()),a.createElement=function(c){
return r.shivMethods?n(c,a,b):b.createElem(c)}
,a.createDocumentFragment=Function("h,f","return function(){
var n=f.cloneNode(),c=n.createElement;
h.shivMethods&&("+l().join().replace(/\w+/g,function(a){
return b.createElem(a),b.frag.createElement(a),'c("'+a+'")'}
)+");
return n}
")(r,b.frag)}
function q(a){
a||(a=b);
var c=m(a);
return r.shivCSS&&!f&&!c.hasCSS&&(c.hasCSS=!!k(a,"article,aside,figcaption,figure,footer,header,hgroup,nav,section{
display:block}
mark{
background:#FF0;
color:#000}
")),j||p(a,c),a}
var c=a.html5||{
}
,d=/^<|^(?:button|map|select|textarea|object|iframe|option|optgroup)$/i,e=/^(?:a|b|code|div|fieldset|h1|h2|h3|h4|h5|h6|i|label|li|ol|p|q|span|strong|style|table|tbody|td|th|tr|ul)$/i,f,g="_html5shiv",h=0,i={
}
,j;
(function(){
try{
var a=b.createElement("a");
a.innerHTML="<xyz></xyz>",f="hidden"in a,j=a.childNodes.length==1||function(){
b.createElement("a");
var a=b.createDocumentFragment();
return typeof a.cloneNode=="undefined"||typeof a.createDocumentFragment=="undefined"||typeof a.createElement=="undefined"}
()}
catch(c){
f=!0,j=!0}
}
)();
var r={
elements:c.elements||"abbr article aside audio bdi canvas data datalist details figcaption figure footer header hgroup mark meter nav output progress section summary time video",shivCSS:c.shivCSS!==!1,supportsUnknownElements:j,shivMethods:c.shivMethods!==!1,type:"default",shivDocument:q,createElement:n,createDocumentFragment:o}
;
a.html5=r,q(b)}
(this,b),e._version=d,e._prefixes=m,e._domPrefixes=p,e._cssomPrefixes=o,e.testProp=function(a){
return D([a])}
,e.testAllProps=F,e.testStyles=w,g.className=g.className.replace(/(^|\s)no-js(\s|$)/,"$1$2")+(f?" js "+t.join(" "):""),e}
(this,this.document),function(a,b,c){
function d(a){
return"[object Function]"==o.call(a)}
function e(a){
return"string"==typeof a}
function f(){
}
function g(a){
return!a||"loaded"==a||"complete"==a||"uninitialized"==a}
function h(){
var a=p.shift();
q=1,a?a.t?m(function(){
("c"==a.t?B.injectCss:B.injectJs)(a.s,0,a.a,a.x,a.e,1)}
,0):(a(),h()):q=0}
function i(a,c,d,e,f,i,j){
function k(b){
if(!o&&g(l.readyState)&&(u.r=o=1,!q&&h(),l.onload=l.onreadystatechange=null,b)){
"img"!=a&&m(function(){
t.removeChild(l)}
,50);
for(var d in y[c])y[c].hasOwnProperty(d)&&y[c][d].onload()}
}
var j=j||B.errorTimeout,l=b.createElement(a),o=0,r=0,u={
t:d,s:c,e:f,a:i,x:j}
;
1===y[c]&&(r=1,y[c]=[]),"object"==a?l.data=c:(l.src=c,l.type=a),l.width=l.height="0",l.onerror=l.onload=l.onreadystatechange=function(){
k.call(this,r)}
,p.splice(e,0,u),"img"!=a&&(r||2===y[c]?(t.insertBefore(l,s?null:n),m(k,j)):y[c].push(l))}
function j(a,b,c,d,f){
return q=0,b=b||"j",e(a)?i("c"==b?v:u,a,b,this.i++,c,d,f):(p.splice(this.i++,0,a),1==p.length&&h()),this}
function k(){
var a=B;
return a.loader={
load:j,i:0}
,a}
var l=b.documentElement,m=a.setTimeout,n=b.getElementsByTagName("script")[0],o={
}
.toString,p=[],q=0,r="MozAppearance"in l.style,s=r&&!!b.createRange().compareNode,t=s?l:n.parentNode,l=a.opera&&"[object Opera]"==o.call(a.opera),l=!!b.attachEvent&&!l,u=r?"object":l?"script":"img",v=l?"script":u,w=Array.isArray||function(a){
return"[object Array]"==o.call(a)}
,x=[],y={
}
,z={
timeout:function(a,b){
return b.length&&(a.timeout=b[0]),a}
}
,A,B;
B=function(a){
function b(a){
var a=a.split("!"),b=x.length,c=a.pop(),d=a.length,c={
url:c,origUrl:c,prefixes:a}
,e,f,g;
for(f=0;
f<d;
f++)g=a[f].split("="),(e=z[g.shift()])&&(c=e(c,g));
for(f=0;
f<b;
f++)c=x[f](c);
return c}
function g(a,e,f,g,h){
var i=b(a),j=i.autoCallback;
i.url.split(".").pop().split("?").shift(),i.bypass||(e&&(e=d(e)?e:e[a]||e[g]||e[a.split("/").pop().split("?")[0]]),i.instead?i.instead(a,e,f,g,h):(y[i.url]?i.noexec=!0:y[i.url]=1,f.load(i.url,i.forceCSS||!i.forceJS&&"css"==i.url.split(".").pop().split("?").shift()?"c":c,i.noexec,i.attrs,i.timeout),(d(e)||d(j))&&f.load(function(){
k(),e&&e(i.origUrl,h,g),j&&j(i.origUrl,h,g),y[i.url]=2}
)))}
function h(a,b){
function c(a,c){
if(a){
if(e(a))c||(j=function(){
var a=[].slice.call(arguments);
k.apply(this,a),l()}
),g(a,j,b,0,h);
else if(Object(a)===a)for(n in m=function(){
var b=0,c;
for(c in a)a.hasOwnProperty(c)&&b++;
return b}
(),a)a.hasOwnProperty(n)&&(!c&&!--m&&(d(j)?j=function(){
var a=[].slice.call(arguments);
k.apply(this,a),l()}
:j[n]=function(a){
return function(){
var b=[].slice.call(arguments);
a&&a.apply(this,b),l()}
}
(k[n])),g(a[n],j,b,n,h))}
else!c&&l()}
var h=!!a.test,i=a.load||a.both,j=a.callback||f,k=j,l=a.complete||f,m,n;
c(h?a.yep:a.nope,!!i),i&&c(i)}
var i,j,l=this.yepnope.loader;
if(e(a))g(a,0,l,0);
else if(w(a))for(i=0;
i<a.length;
i++)j=a[i],e(j)?g(j,0,l,0):w(j)?B(j):Object(j)===j&&h(j,l);
else Object(a)===a&&h(a,l)}
,B.addPrefix=function(a,b){
z[a]=b}
,B.addFilter=function(a){
x.push(a)}
,B.errorTimeout=1e4,null==b.readyState&&b.addEventListener&&(b.readyState="loading",b.addEventListener("DOMContentLoaded",A=function(){
b.removeEventListener("DOMContentLoaded",A,0),b.readyState="complete"}
,0)),a.yepnope=k(),a.yepnope.executeStack=h,a.yepnope.injectJs=function(a,c,d,e,i,j){
var k=b.createElement("script"),l,o,e=e||B.errorTimeout;
k.src=a;
for(o in d)k.setAttribute(o,d[o]);
c=j?h:c||f,k.onreadystatechange=k.onload=function(){
!l&&g(k.readyState)&&(l=1,c(),k.onload=k.onreadystatechange=null)}
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l||(l=1,c(1))}
,e),i?k.onload():n.parentNode.insertBefore(k,n)}
,a.yepnope.injectCss=function(a,c,d,e,g,i){
var e=b.createElement("link"),j,c=i?h:c||f;
e.href=a,e.rel="stylesheet",e.type="text/css";
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g||(n.parentNode.insertBefore(e,n),m(c,0))}
}
(this,document),Modernizr.load=function(){
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;
CSS代码(style.css):
/* reset */
html,body,div,span,applet,object,iframe,h1,h2,h3,h4,h5,h6,p,blockquote,pre,a,abbr,acronym,address,big,cite,code,del,dfn,em,img,ins,kbd,q,s,samp,small,strike,strong,sub,sup,tt,var,b,u,i,center,dl,dt,dd,ol,ul,li,fieldset,form,label,legend,table,caption,tbody,tfoot,thead,tr,th,td,article,aside,canvas,details,embed,figure,figcaption,footer,header,hgroup,menu,nav,output,ruby,section,summary,time,mark,audio,video{margin:0;padding:0;border:0;font:inherit;font-size:100%;vertical-align:baseline;}
html{line-height:1;}
article,aside,details,figcaption,figure,footer,header,hgroup,menu,nav,section,summary{display:block;}
/* body */
body{font-family:Satisfy,serif;color:#837362;background:#fbf8f7;}
h2{font-size:1.5em;line-height:1.6;}
/* links */
a{color:#9b4849;text-decoration:none;display:block;}
a:hover{color:#783839;}
#open{width:100%;text-align:center;margin-top:50px;}
#flip{padding:160px 20px 0 0;}
#flip2back{margin-top:10px;}
#close{position:absolute;bottom:20px;right:40px;}
/*****************************/
section.container{position:relative;width:600px;height:300px;margin:280px auto 0;-webkit-perspective:1000px;-moz-perspective:1000px;}
section.container > form.flip{width:100%;height:100%;position:absolute;-webkit-transform:rotateY(180deg);-moz-transform:rotateY(180deg);-webkit-transform-style:preserve-3d;-moz-transform-style:preserve-3d;-webkit-transition:-webkit-transform 0.7s 0s;-moz-transition:-moz-transform 0.7s 0s;-webkit-transform-origin:center center;-moz-transform-origin:center center;}
section.container > form.flip > .front,section.container > form.flip > .back{position:absolute;width:100%;height:100%;-webkit-backface-visibility:hidden;-moz-backface-visibility:hidden;}
section.container > form.flip > .back{-webkit-transform:rotateY(180deg);-moz-transform:rotateY(180deg);background:#837362;box-shadow:inset 0 10px 30px -10px rgba(0,0,0,0.3),inset 0 1px 0 rgba(0,0,0,0.2),inset 0 2px 0 rgba(255,255,255,0.2);}
section.container:target > form.flip{-webkit-transform:rotateY(0deg);-moz-transform:rotateY(0deg);}
.no-csstransforms3d section.container:target > form.flip > .back{display:none;}
.container#lid{position:relative;width:100%;height:50%;-webkit-perspective:800px;-moz-perspective:800px;z-index:2;-moz-transition:z-index 0s 1s;-webkit-transition:z-index 0s 1s;}
.no-csstransforms3d .container#lid{-webkit-transition:none;-moz-transition:none;}
#content:target .container#lid{z-index:-1;-moz-transition:z-index 0s .5s;-webkit-transition:z-index 0s .5s;}
.no-csstransforms3d #content:target .container#lid{-webkit-transition:none;-moz-transition:none;}
.no-csstransforms3d .container#lid .back{display:none;}
.no-csstransforms3d #content:target .container#lid .back{display:block;top:-150px;}
#lid .flip{width:100%;height:100%;}
#lid .flip{position:absolute;-webkit-transform-style:preserve-3d;-moz-transform-style:preserve-3d;-webkit-transition:-webkit-transform 0.5s 1s;-moz-transition:-moz-transform 0.5s 1s;-webkit-transform-origin:left top;-moz-transform-origin:left top;}
#lid .flip > .front,#lid .flip > .back{position:absolute;width:100%;height:100%;-webkit-backface-visibility:hidden;-moz-backface-visibility:hidden;}
#lid .flip > .back{-webkit-transform:rotateX(180deg);-moz-transform:rotateX(180deg);}
#content:target #lid .flip{-webkit-transform:rotateX(180deg);-moz-transform:rotateX(180deg);-webkit-transition-duration:0.5s;-moz-transition-duration:0.5s;-webkit-transition-delay:0s;-moz-transition-delay:0s;}
#letter .flip > div,#lid .flip > div,section.container > form.flip > div{-webkit-box-sizing:border-box;-moz-box-sizing:border-box;box-sizing:border-box;}
#lid .flip .front,section.container > form.flip .front{background:beige url("../images/bg.png");border:1px #eae1d5 solid;box-shadow:inset 0 0 10px 1px rgba(255,255,255,0.6),0 2px 3px -2px rgba(0,0,0,0.6);padding:20px 30px;color:#837362;text-shadow:0 1px 0 #fff,0 1px 0 #fff;}
section.container > form.flip > .front{font-size:1.25em;background:beige url("../images/bg.png");background:url("../images/stamp.png") no-repeat 450px 20px,url("../images/bg.png");padding:120px 20px 20px 40%;border:1px #eae1d5 solid;}
#lid .flip .front{font-size:1.25em;border-radius:0 0 40px 40px;}
#lid .flip .back{background:#837362;border-radius:40px 40px 0 0;border:35px solid rgba(255,255,255,0.1);border-bottom:none;box-shadow:inset 0 10px 30px 10px rgba(0,0,0,0.1);}
#top{text-align:right;background:beige url("../images/bg.png");background:-moz-linear-gradient(top,rgba(255,255,255,0) 0%,rgba(163,140,130,0.17) 100%),url("../images/bg.png");background:-webkit-gradient(linear,left top,left bottom,color-stop(0%,rgba(255,255,255,0)),color-stop(100%,rgba(163,140,130,0.17))),url("../images/bg.png");background:-webkit-linear-gradient(top,rgba(255,255,255,0) 0%,rgba(163,140,130,0.17) 100%),url("../images/bg.png");background:-o-linear-gradient(top,rgba(255,255,255,0) 0%,rgba(163,140,130,0.17) 100%),url("../images/bg.png");background:-ms-linear-gradient(top,rgba(255,255,255,0) 0%,rgba(163,140,130,0.17) 100%),url("../images/bg.png");-webkit-box-sizing:border-box;-moz-box-sizing:border-box;box-sizing:border-box;width:100%;height:65%;position:absolute;left:0;bottom:0;z-index:1;border:1px #eae1d5 solid;box-shadow:inset 0 0 10px 1px rgba(255,255,255,0.6),0 -2px 4px -3px rgba(0,0,0,0.75),0 2px 3px -2px rgba(0,0,0,0.6);}
#letter{background:#fafafa;width:90%;height:95%;position:absolute;left:5%;top:5%;z-index:0;-webkit-transition:.5s .5s;-moz-transition:.5s .5s;-o-transition:0s 0s;}
#content:target #letter{top:-40%;-o-transition:.5s .5s;}
#letter .container{position:absolute;width:100%;height:50%;-webkit-perspective:800px;top:0;left:0;-webkit-transition:0s 0s;-moz-perspective:800px;-moz-transition:0s 0s;z-index:1;}
#letter .flip{width:100%;height:100%;}
#letter .flip{position:absolute;-webkit-transform-style:preserve-3d;-moz-transform-style:preserve-3d;-webkit-transition:-webkit-transform 0.5s 0s;-moz-transition:-moz-transform 0.5s 0s;-webkit-transform-origin:left top;-moz-transform-origin:left top;}
#letter .flip > .front,#letter .flip > .back{position:absolute;width:100%;height:100%;-webkit-backface-visibility:hidden;-moz-backface-visibility:hidden;}
#letter .flip > .back{-webkit-transform:rotateX(180deg);-moz-transform:rotateX(180deg);}
#content:target #letter .flip{-webkit-transform:rotateX(180deg);-moz-transform:rotateX(180deg);-webkit-transition-duration:0.5s;-moz-transition-duration:0.5s;-webkit-transition-delay:1s;-moz-transition-delay:1s;}
#content:target #letter .container{z-index:-1;-webkit-transition:z-index 0s 1.5s;-moz-transition:z-index 0s 1.5s;}
#letter .flip .front{background:#fafafa;box-shadow:0 2px 3px 0 rgba(0,0,0,0.2);}
.no-csstransforms3d #content:target #letter .flip .front{display:none;}
#letter .flip .back{background:#fafafa;background:-webkit-linear-gradient(top,#fafafa 90%,#f7f7f7 100%);background:-moz-linear-gradient(top,#fafafa 80%,#f7f7f7 100%);padding:40px 40px 0;font-size:18px;line-height:1.4;border-bottom:1px solid rgba(255,255,255,0.5);box-shadow:0 -5px 8px -4px rgba(0,0,0,0.15);}
.no-csstransforms3d #content:target #letter .flip .back{top:-140px;}
input[type="text"]{background:transparent;border:none;border-bottom:1px dotted #837362;box-shadow:0 1px 0 rgba(255,255,255,0.4);width:50%;-webkit-appearance:none;}
input[type="text"]:focus{outline:none;border-bottom:1px solid #837362;-webkit-appearance:none;}
textarea{margin:10px auto 0;-webkit-box-sizing:border-box;-moz-box-sizing:border-box;box-sizing:border-box;width:90%;height:160px;padding:10px;display:block;background:transparent;background:rgba(255,255,255,0.07);border:1px dashed #c8bfb6;}
textarea:focus{outline:none;background-color:rgba(255,255,255,0.12);border-color:rgba(255,255,255,0.46);box-shadow:inset 0 0 2px rgba(0,0,0,0.1);}
input[type="submit"]{cursor:pointer;display:block;margin:10px auto;-webkit-appearance:none;font-size:.9em;background:#9b4849;padding:5px 20px;border-radius:3px;border:1px solid #9b4849;box-shadow:inset 0 1px 0 rgba(255,255,255,0.5);color:#fff;-webkit-transition:background .5s;}
input[type="submit"]:hover{background:#783839;}
/*-------ie8-----------*/
.container.target > form.flip > .back,#content.target #letter .flip .front{display:none;}
#content.target .container#lid{z-index:-1;}
#content.target .container#lid .back{display:block;top:-150px;}
#content.target #letter{top:-40%;}
#content.target #letter .flip .back{top:-140px;}
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