CSS3Drop Shadow

<div class="demo">
        <div class="box box1"><p>Box1</p></div>
        <div class="box box2"><p>Box2</p></div>
        <div class="box box3"><p>Box3</p></div>
        <div class="box box4"><p>Box4</p><div class="shBl"></div><div class="shBr"></div></div>
        <div class="box box5"><p>Box5</p><div class="shBl"></div><div class="shBlFlod"></div></div>
        <div class="box box6"><p>Box6</p><div class="cornerLf"></div><div class="cornerRt"></div></div>
        <div class="box box7"><p>Box7</p></div>
        <div class="box box8"><p>Box8</p></div>
        <div class="box box9"><p>Box9</p></div>
        <div class="box box10"><p>Box10</p></div>
        <div class="box box11"><p>Box11</p><div class="ribbon"></div></div>
        <div class="box box12"><p>Box12</p><div class="shBl"></div><div class="shBlFlod"></div><div class="ribbon"></div></div>
        <div class="box box13"><p>Box13</p><div class="cornerLf"></div><div class="cornerRt"></div><div class="ribbon"></div></div>
        <div class="box box14"><p>Box14</p><div class="ribbon"></div></div>
        <div class="box box15"><p>Box15</p><div class="ribbon"></div></div>
    </div>

 

*{margin: 0;padding:0;}
        body {margin: 0; padding: 20px 100px;background-color: #f4f4f4;}
        pre{max-height:200px;overflow:auto;}
        div.demo {overflow:auto;}
        .box {
            width: 300px;
            min-height: 300px;
            margin: 30px;
            display: inline-block;
            background: #fff;
            border: 1px solid #ccc;
            position:relative;
        }
        .box p {
            margin: 30px;
            color: #aaa;
            outline: none;
        }
        /*=========Box1===========*/
        .box1{            
            background: -webkit-gradient(linear, 0% 20%, 0% 100%, from(#fff), to(#fff), color-stop(.1,#f3f3f3));
            background: -webkit-linear-gradient(0% 0%, #fff, #f3f3f3 10%, #fff);
            background: -moz-linear-gradient(0% 0%, #fff, #f3f3f3 10%, #fff);
            background: -o-linear-gradient(0% 0%, #fff, #f3f3f3 10%, #fff);
            /*设置Box的阴影效果*/
            -webkit-box-shadow: 0px 3px 30px rgba(0, 0, 0, 0.1) inset;
            -moz-box-shadow: 0px 3px 30px rgba(0, 0, 0, 0.1) inset;
            box-shadow: 0px 3px 30px rgba(0, 0, 0, 0.1) inset;
            /*制作右下脚折边效果*/
            -moz-border-radius: 0 0 6px 0 / 0 0 50px 0;
            -webkit-border-radius: 0 0 6px 0 / 0 0 50px 0;
            border-radius: 0 0 6px 0 / 0 0 50px 0;
        }
        /*使用:before来制作底部阴影，并对阴影进行旋转的扭曲和位移设置*/
        .box1:before{
            content: '';
            width: 50px;
            height: 100px;
            position:absolute;
            bottom:0; right:0;
            -webkit-box-shadow: 20px 20px 10px rgba(0, 0, 0, 0.1);
            -moz-box-shadow: 20px 20px 15px rgba(0, 0, 0, 0.1);
            box-shadow: 20px 20px 15px rgba(0, 0, 0, 0.1);
            z-index:-1;
            -webkit-transform: translate(-35px,-40px)    skew(0deg,30deg) rotate(-25deg);
            -moz-transform: translate(-35px,-40px) skew(0deg,32deg)    rotate(-25deg);
            -o-transform: translate(-35px,-40px) skew(0deg,32deg)    rotate(-25deg);    
                transform: translate(-35px,-40px) skew(0deg,32deg)    rotate(-25deg);    
        }
        /*使用:after来制作顶部的阴影，并对阴影进行旋转的扭曲和位移设置*/
        .box1:after{
            content: '';
            width: 100px;
            height: 100px;
            top:0; left:0;
            position:absolute;
            display: inline-block;
            z-index:-1;
            -webkit-box-shadow: -10px -10px 10px rgba(0, 0, 0, 0.2);
            -moz-box-shadow: -10px -10px 15px rgba(0, 0, 0, 0.2);
            box-shadow: -10px -10px 15px rgba(0, 0, 0, 0.2);
            -webkit-transform: rotate(2deg)    translate(20px,25px) skew(20deg);
            -moz-transform: rotate(7deg) translate(20px,25px) skew(20deg);
            -o-transform: rotate(7deg) translate(20px,25px) skew(20deg);    
                transform: rotate(7deg) translate(20px,25px) skew(20deg);                
        }
        
        /*==========Box2============*/
        .box2{
            padding: 0 0 1px 0;
            background: #f3f3f3;
            background: -webkit-gradient(linear, 0% 20%, 0% 92%, from(#f3f3f3), to(#fff), color-stop(.1,#f3f3f3));
            background: -webkit-linear-gradient(0 0 270deg, #f3f3f3, #f3f3f3 10%, #fff);
            background: -moz-linear-gradient(0 0 270deg, #f3f3f3, #f3f3f3 10%, #fff);
            background: -o-linear-gradient(0 0 270deg, #f3f3f3, #f3f3f3 10%, #fff);
            border-top: 1px solid #ccc;
            border-right: 1px solid #ccc;
            -webkit-border-radius: 0 0 60px 0 / 0 0 60px 0;
            -moz-border-radius: 0 0 60px 0 / 0 0 60px 0;
            border-radius: 0 0 60px 0 / 0 0 60px 0;
            -webkit-box-shadow: -1px 2px 2px rgba(0, 0, 0, 0.2);
            -moz-box-shadow: -1px 2px 2px rgba(0, 0, 0, 0.2);
            box-shadow: -1px 2px 2px rgba(0, 0, 0, 0.2);            
        }
        .box2:before{
            content:'';    
            width: 25px;
            height: 20px;
            position: absolute;
            bottom:0;
            right:0;
            -webkit-border-radius: 0 0 30px 0;
            -moz-border-radius: 0 0 30px 0;
            border-radius: 0 0 30px 0;
            -webkit-box-shadow: -2px -2px 5px rgba(0, 0, 0, 0.3);
            -moz-box-shadow: -2px -2px 5px rgba(0, 0, 0, 0.3);
            box-shadow:-2px -2px 5px rgba(0, 0, 0, 0.3);
            -webkit-transform:    rotate(-20deg) skew(-40deg,-3deg) translate(-13px,-13px);
            -moz-transform:    rotate(-20deg) skew(-40deg,-3deg) translate(-13px,-13px);
            -o-transform:    rotate(-20deg) skew(-40deg,-3deg) translate(-13px,-13px);
            transform: rotate(-20deg) skew(-40deg,-3deg) translate(-13px,-13px);
        }
        /*这里，我们做出的褶皱阴影*/
        .box2:after{
            content: '';
            z-index: -1;
            width: 100px;
            height: 100px;
            position:absolute;
            bottom:0;
            right:0;
            background: rgba(0, 0, 0, 0.2);
            display: inline-block;
            -webkit-box-shadow: 20px 20px 8px rgba(0, 0, 0, 0.2);
            -moz-box-shadow: 20px 20px 18px rgba(0, 0, 0, 0.2);
            box-shadow: 20px 20px 8px rgba()0,0,0,0.2;
            -webkit-transform: rotate(0deg) translate(-45px,-20px) skew(20deg);
            -moz-transform: rotate(0deg) translate(-45px,-20px) skew(20deg);
            -o-transform: rotate(0deg) translate(-45px,-20px) skew(20deg);    
            transform: rotate(0deg) translate(-45px,-20px) skew(20deg);       
        }
        
        /*==========Box3=========*/
        .box3{
            padding: 5px 0 ;
            background: -webkit-gradient(linear, 0% 20%, 0% 92%, from(#fff), to(#f3f3f3), color-stop(.1,#fff));
            background: -webkit-linear-gradient(0 0 270deg, #f3f3f3, #f3f3f3 10%, #fff);
            background: -moz-linear-gradient(0 0 270deg, #f3f3f3, #f3f3f3 10%, #fff);
            background: -o-linear-gradient(0 0 270deg, #f3f3f3, #f3f3f3 10%, #fff);
            -webkit-border-radius: 60px / 5px;
            -moz-border-radius: 60px / 5px;
            border-radius:60px / 5px;
            -webkit-box-shadow: 0px 0px 35px rgba(0, 0, 0, 0.1) inset;
            -moz-box-shadow: 0px 0px 35px rgba(0, 0, 0, 0.1) inset;
            box-shadow: 0px 0px 35px rgba(0, 0, 0, 0.1) inset;
        }

        .box3:before{
            content: '';
            width: 50px;
            height: 50px;
            top:0; right:0;
            position:absolute;
            display: inline-block;
            z-index:-1;
            -webkit-box-shadow: 10px -10px 8px rgba(0, 0, 0, 0.2);
            -moz-box-shadow: 10px -10px 8px rgba(0, 0, 0, 0.2);
            box-shadow: 10px -10px 8px rgba(0, 0, 0, 0.2);
            -webkit-transform: rotate(2deg) translate(-14px,20px) skew(-20deg);
            -moz-transform: rotate(2deg) translate(-14px,20px) skew(-20deg);
            -o-transform: rotate(2deg) translate(-14px,20px) skew(-20deg);    
            transform: rotate(2deg) translate(-14px,20px) skew(-20deg);                
        }

        .box3:after{
            content: '';
            width: 100px;
            height: 100px;
            top:0; left:0;
            position:absolute;
            z-index:-1;
            display: inline-block;
            -webkit-box-shadow: -10px -10px 10px rgba(0, 0, 0, 0.2);
            -moz-box-shadow: -10px -10px 10px rgba(0, 0, 0, 0.2);
            box-shadow: -10px -10px 10px rgba(0, 0, 0, 0.2);
            -webkit-transform: rotate(2deg) translate(20px,25px) skew(20deg);
            -moz-transform: rotate(2deg) translate(20px,25px) skew(20deg);    
            -o-transform: rotate(2deg) translate(20px,25px) skew(20deg);    
            transform: rotate(2deg) translate(20px,25px) skew(20deg);            
        }
        
        /*============Box4==============*/
        .box4{
            padding: 5px 0 ;
            background: #fff;
            background: -webkit-gradient(linear, 0% 20%, 0% 100%, from(#fff), to(#fff), color-stop(.2, #f2f2f2));
            background: -webkit-linear-gradient(0% 0% 360deg, #fff, #f2f2f2 20%, #fff );
            background: -moz-linear-gradient(0% 0% 360deg, #fff, #f2f2f2 20%, #fff );
            background: -o-linear-gradient(0% 0% 360deg, #fff, #f2f2f2 20%, #fff );
            -webkit-box-shadow: 0px 0px 10px rgba(0, 0, 0, 0.3);
            -moz-box-shadow: 0px 0px 10px rgba(0, 0, 0, 0.3);
            box-shadow: 0px 0px 10px rgba(0, 0, 0, 0.3);
        }

        .box4:before{
            content: '';
            width: 50px;
            height: 50px;
            top:0; right:0;
            position:absolute;
            z-index: -1;
            -webkit-box-shadow: 10px -10px 8px rgba(0, 0, 0, 0.2);
            -moz-box-shadow: 10px -10px 8px rgba(0, 0, 0, 0.2);
            box-shadow: 10px -10px 8px rgba(0, 0, 0, 0.2);
            -webkit-transform: rotate(2deg) translate(-14px,20px) skew(-20deg);
            -moz-transform: rotate(2deg) translate(-14px,20px) skew(-20deg);    
                -o-transform: rotate(2deg) translate(-14px,20px) skew(-20deg);
                     transform: rotate(2deg) translate(-14px,20px) skew(-20deg);        
        }
        .box4:after{
            content: '';
            width: 50px;
            height: 50px;
            top:0; left:0;
            position:absolute;
            z-index:-1;
            display: inline-block;
            -webkit-box-shadow: -10px -10px 10px rgba(0, 0, 0, 0.2);
            -moz-box-shadow: -10px -10px 10px rgba(0, 0, 0, 0.2);
            box-shadow: -10px -10px 10px rgba(0, 0, 0, 0.2);
            -webkit-transform: rotate(2deg) translate(12px,25px) skew(20deg);
            -moz-transform: rotate(2deg) translate(12px,25px) skew(20deg);    
            -o-transform: rotate(2deg) translate(12px,25px) skew(20deg);
            transform: rotate(2deg) translate(12px,25px) skew(20deg);                    
        }
        /*盒子右下角阴影效果*/
        .box4 .shBr{
            width: 100px;
            height: 100px;
            bottom:0; right:0;
            position:absolute;
            z-index: -1;
            -webkit-box-shadow: 10px 10px 10px rgba(0, 0, 0, 0.2);
            -moz-box-shadow: 10px 10px 10px rgba(0, 0, 0, 0.2);
            box-shadow: 10px 10px 10px rgba(0, 0, 0, 0.2);
            -webkit-transform: rotate(0deg) translate(-20px,-15px) skew(20deg);
            -moz-transform: rotate(0deg) translate(-20px,-15px) skew(20deg);
            -o-transform: rotate(0deg) translate(-20px,-15px) skew(20deg);    
                transform: rotate(0deg) translate(-20px,-15px) skew(20deg);                   
        }
        /*盒子左下角阴影效果*/
        .box4 .shBl{
            width: 100px;
            height: 100px;
            bottom:0; left:0;
            position:absolute;
            z-index: -1;
            -webkit-box-shadow: -10px 10px 10px rgba(0, 0, 0, 0.2);
            -moz-box-shadow: -10px 10px 10px rgba(0, 0, 0, 0.2);
            box-shadow: -10px 10px 10px rgba(0, 0, 0, 0.2);
            -webkit-transform: rotate(0deg) translate(20px,-15px) skew(-20deg);
            -moz-transform: rotate(0deg) translate(20px,-15px) skew(-20deg);
            -o-transform: rotate(0deg) translate(20px,-15px) skew(-20deg);
            transform: rotate(0deg) translate(20px,-15px) skew(-20deg);               
        }
        
        /*==========Box5==========*/
        .box5{
            padding: 0 0 1px 0;
            background: #f3f3f3;
            background: -webkit-gradient(linear, 0% 20%, 0% 92%, from(#f3f3f3), to(#fff), color-stop(.1,#f3f3f3));
            background: -webkit-linear-gradient(0 0 270deg, #f3f3f3, #f3f3f3 10%, #fff);
            background: -o-linear-gradient(0 0 270deg, #f3f3f3, #f3f3f3 10%, #fff);
            background: -moz-linear-gradient(0 0 270deg, #f3f3f3, #f3f3f3 10%, #fff);
            border-top: 1px solid #ccc;
            border-right: 1px solid #ccc;
            -webkit-border-radius: 0 0 60px 60px / 0 0 60px 60px;
            -moz-border-radius: 0 0 60px 60px / 0 0 60px 60px;
            border-radius: 0 0 60px 60px / 0 0 60px 60px;
            -webkit-box-shadow: -1px 2px 2px rgba(0, 0, 0, 0.2);    
            -moz-box-shadow: -1px 2px 2px rgba(0, 0, 0, 0.2);
            box-shadow: -1px 2px 2px rgba(0, 0, 0, 0.2);
        }
        /*右折效果*/
        .box5:before{
            content:'';    
            width: 25px;
            height: 20px;
            background: white;
            position: absolute;
            bottom:0; right:0;
            background: -webkit-gradient(linear, 0% 20%, 50% 40%, from(#fff), to( #eee), color-stop(.1,#fff));
            background: -webkit-linear-gradient(0 50% 90deg, #fff, #fff 10%, #eee);
            background: -moz-linear-gradient(0 50% 90deg, #fff, #fff 10%, #eee);
            background: -o-linear-gradient(0 50% 90deg, #fff, #fff 10%, #eee);
            -webkit-border-radius: 0 0 30px 0;
            -moz-border-radius: 0 0 30px 0;
            border-radius: 0 0 30px 0;
            -webkit-box-shadow: -2px -2px 5px rgba(0, 0, 0, 0.3);
            -moz-box-shadow: -2px -2px 5px rgba(0, 0, 0, 0.3);
            box-shadow: -2px -2px 5px rgba(0, 0, 0, 0.3);
            -webkit-transform: rotate(-20deg) skew(-40deg,-3deg) translate(-13px,-13px);
            -moz-transform: rotate(-20deg) skew(-40deg,-3deg)translate(-13px,-13px);
            -o-transform: rotate(-20deg)skew(-40deg,-3deg) translate(-13px,-13px);    
                transform: rotate(-20deg) skew(-40deg,-3deg) translate(-13px,-13px);                    
        }
        
        /*右折的阴影*/
        .box5:after{
            content: '';
            z-index: -10;
            width: 100px;
            height: 100px;
            position:absolute;
            bottom:0;
            right:0;
            background: rgba(0, 0, 0, 0.2);
            display: inline-block;
            -webkit-box-shadow: 20px 20px 8px rgba(0, 0, 0, 0.2);
            -moz-box-shadow: 20px 20px 18px rgba(0, 0, 0, 0.2);
            box-shadow: 20px 20px 8px rgba(0, 0, 0, 0.2);
            -webkit-transform: rotate(0deg) translate(-45px,-20px) skew(20deg);
            -moz-transform: rotate(0deg) translate(-45px,-20px) skew(20deg);
                -o-transform: rotate(0deg) translate(-45px,-20px) skew(20deg);
                transform: rotate(0deg) translate(-45px,-20px) skew(20deg);                
        }
        /*左下角折角*/
        .box5 .shBlFlod{
            z-index: -10;
            width: 50px;
            height: 50px;
            position:absolute;
            bottom:0; left:0;
            -webkit-box-shadow: -20px 20px 8px rgba(0, 0, 0, 0.2);
            -moz-box-shadow: -20px 20px 18px rgba(0, 0, 0, 0.2);
            box-shadow: -20px 20px 8px rgba(0, 0, 0, 0.2);
            -webkit-transform: rotate(0deg) translate(40px,-20px) skew(-20deg);
            -moz-transform: rotate(0deg) translate(40px,-20px) skew(-20deg);
            -o-transform: rotate(0deg) translate(40px,-20px) skew(-20deg);
            transform: rotate(0deg) translate(40px,-20px) skew(-20deg);                    
        }
        /*左下角阴影*/
        .box5 .shBl{
            content:'';    
            width: 25px;
            height: 20px;
            background: white;
            position: absolute;
            bottom:0; left:0;
            background: #fff;
            background: -webkit-gradient(linear, 0% 20%, 50% 80%, from(#fff), to( #eee), color-stop(.1,#fff));
            background: -webkit-linear-gradient(0 50%, #fff, #fff 10%, #eee);
            background: -moz-linear-gradient(0 50%, #fff, #fff 10%, #eee);
            background: -o-linear-gradient(0 50%, #fff, #fff 10%, #eee);
            -webkit-border-radius:0 0 30px 0;
            -moz-border-radius:0 0 30px 0;
            border-border-radius:0 0 30px 0;
            -webkit-box-shadow: -2px -2px 5px rgba(0, 0, 0, 0.3);
            -moz-box-shadow: -2px -2px 5px rgba(0, 0, 0, 0.3);
            box-shadow: -2px -2px 5px rgba(0, 0, 0, 0.3);
            -webkit-transform: rotate(103deg) skew(-3deg,-40deg) translate(-13px,-15px);
            -moz-transform: rotate(103deg) skew(-3deg,-40deg) translate(-13px,-15px);    
            -o-transform: rotate(103deg) skew(-3deg,-40deg) translate(-13px,-15px);
            transform: rotate(103deg) skew(-3deg,-40deg) translate(-13px,-15px);                        
        }
        
        /*=========Box6========*/
        .box6{
            padding: 0 0 1px 0;
            background:#fff;
            background: -webkit-gradient(linear, 0% 20%, 0% 92%, from(#fff), to(#f3f3f3), color-stop(.1,#fff));
            background: -webkit-linear-gradient(0 0 270deg, #fff, #fff 10%, #f3f3f3);
            background: -moz-linear-gradient(0 0 270deg, #fff, #fff 10%, #f3f3f3);
            background: -o-linear-gradient(0 0 270deg, #fff, #fff 10%, #f3f3f3);
            border-top: 1px solid #ccc;
            border-right: 1px solid #ccc;
            border-left: 1px solid #ccc;
            -webkit-border-radius: 60px 60px 60px 0 / 5px 5px 60px 0;
            border-radius: 60px 60px 60px 0 / 5px 5px 60px 0;
            border-radius: 60px 60px 60px 0 / 5px 5px 60px 0;
            -webkit-box-shadow: 0px 0px 12px rgba(0, 0, 0, 0.3) ;
            -moz-box-shadow: 0px 0px 12px rgba(0, 0, 0, 0.3) ;
            box-shadow: 0px 0px 12px rgba(0, 0, 0, 0.3) ;
        }

        .box6:before{
            content:'';    
            width: 25px;
            height: 20px;
            position: absolute;
            bottom:0;
            right:0;
            -webkit-border-radius: 0 0 30px 0;
            -moz-border-radius: 0 0 30px 0;
            border-radius: 0 0 30px 0;
            -webkit-box-shadow: -2px -2px 5px rgba(0, 0, 0, 0.3);
            -moz-box-shadow: -2px -2px 5px rgba(0, 0, 0, 0.3);
            box-shadow: -2px -2px 5px rgba(0, 0, 0, 0.3);
            -webkit-transform:    rotate(-20deg) skew(-40deg,-3deg) translate(-13px,-13px);
            -moz-transform:    rotate(-20deg) skew(-40deg,-3deg) translate(-13px,-13px);    
            -o-transform:    rotate(-20deg) skew(-40deg,-3deg) translate(-13px,-13px);    
            transform:    rotate(-20deg) skew(-40deg,-3deg) translate(-13px,-13px);                        
        }

        .box6:after{
            content: '';
            z-index: -10;
            width: 100px;
            height: 100px;
            position:absolute;
            bottom:0;
            right:0;
            background: rgba(0, 0, 0, 0.2);
            display: inline-block;
            -webkit-box-shadow: 20px 20px 8px rgba(0, 0, 0, 0.2);
            -moz-box-shadow: 20px 20px 8px rgba(0, 0, 0, 0.2);
            box-shadow: 20px 20px 8px rgba(0, 0, 0, 0.2);
            -webkit-transform: rotate(0deg) translate(-45px,-20px) skew(20deg);
            -moz-transform: rotate(0deg) translate(-45px,-20px) skew(20deg);
            -o-transform: rotate(0deg) translate(-45px,-20px) skew(20deg);
            transform: rotate(0deg) translate(-45px,-20px) skew(20deg);                        
        }
        .box6 .cornerLf{
            width: 100px;
            height: 100px;
            top:0; left:0;
            position:absolute;
            z-index:-6;
            display: inline-block;
            -webkit-box-shadow: -10px -10px 10px rgba(0, 0, 0, 0.2);
            -moz-box-shadow: -10px -10px 10px rgba(0, 0, 0, 0.2);
            box-shadow: -10px -10px 20px rgba(0, 0, 0, 0.2);
            -webkit-transform: rotate(2deg) translate(20px,25px) skew(20deg);
            -moz-transform: rotate(2deg) translate(20px,20px) skew(20deg);
            -o-transform: rotate(2deg) translate(20px,20px) skew(20deg);
            transform: rotate(2deg) translate(20px,20px) skew(20deg);                        
        }
        .box6 .cornerRt{
            content: '';
            width: 50px;
            height: 50px;
            top:0; right:0;
            position:absolute;
            display: inline-block;
            z-index:-6;
            -webkit-box-shadow: 10px -10px 8px rgba(0, 0, 0, 0.2);
            -moz-box-shadow: 10px -10px 18px rgba(0, 0, 0, 0.2);
            box-shadow: 10px -10px 8px rgba(0, 0, 0, 0.2);
            -webkit-transform: rotate(2deg) translate(-14px,20px) skew(-20deg);
            -moz-transform: rotate(2deg) translate(-14px,15px) skew(-20deg);
            -o-transform: rotate(2deg) translate(-14px,15px) skew(-20deg);
            transform: rotate(2deg) translate(-14px,15px) skew(-20deg);                        
        }
        /*==========Box7=========*/
        .box7{
            padding: 0 0 1px 0;
            background: #fff;
            background: -webkit-gradient(linear, 0% 20%, 0% 92%, from(#fff), to(#f3f3f3), color-stop(.1,#fff));
            background: -webkit-linear-gradient(0 0 270deg, #fff, #fff 10%, #f3f3f3);
            background: -o-linear-gradient(0 0 270deg, #fff, #fff 10%, #f3f3f3);
            background: -moz-linear-gradient(0 0 270deg, #fff, #fff 10%, #f3f3f3);
            border-top: 1px solid #ccc;
            border-right: 1px solid #ccc;
            border-left: 1px solid #ccc;
            -webkit-box-shadow: 0px 0px 12px rgba(0, 0, 0, 0.2);
            -moz-box-shadow: 0px 0px 12px rgba(0, 0, 0, 0.2);
            box-shadow: 0px 0px 12px rgba(0, 0, 0, 0.2);
        }

        .box7:before{
            content: '';
            position:absolute;
            width: 130px;
            height: 30px;
            border-left: 1px dashed rgba(0, 0, 0, 0.1);
            border-right: 1px dashed rgba(0, 0, 0, 0.1);
            background: rgba(0, 0, 0, 0.1);
            background: -webkit-gradient(linear, 555% 20%, 0% 92%, from(rgba(0, 0, 0, 0.1)), to(rgba(0, 0, 0, 0.0)), color-stop(.1,rgba(0, 0, 0, 0.2)));
            background: -webkit-linear-gradient(555% 0 180deg, rgba(0,0,0,0.1), rgba(0,0,0,0.2) 10%, rgba(0,0,0,0.0));
            background: -o-linear-gradient(555% 0 180deg, rgba(0,0,0,0.1), rgba(0,0,0,0.2) 10%, rgba(0,0,0,0.0));
            background: -moz-linear-gradient(555% 0 180deg, rgba(0,0,0,0.1), rgba(0,0,0,0.2) 10%, rgba(0,0,0,0.0));
            -webkit-box-shadow: 0px 0px 12px rgba(0, 0, 0, 0.2);
            -moz-box-shadow: 0px 0px 12px rgba(0, 0, 0, 0.2);
            box-shadow: 0px 0px 12px rgba(0, 0, 0, 0.2);
            -webkit-transform:translate(-50px,10px) skew(10deg,10deg) rotate(-50deg);
            -moz-transform:translate(-50px,10px) skew(10deg,10deg) rotate(-50deg);    
                -o-transform:translate(-50px,10px) skew(10deg,10deg) rotate(-50deg);    
                transform:translate(-50px,10px) skew(10deg,10deg) rotate(-50deg);                        
        }
        .box7:after{
            content: '';
            position:absolute;
            right:0;
            bottom:0;
            width: 130px;
            height: 30px;
            background: rgba(0, 0, 0, 0.1);
            background: -webkit-gradient(linear, 555% 20%, 0% 92%, from(rgba(0, 0, 0, 0.1)), to(rgba(0, 0, 0, 0.0)), color-stop(.1,rgba(0, 0, 0, 0.2)));
            background: -webkit-linear-gradient(555% 0 180deg, rgba(0,0,0,0.1), rgba(0,0,0,0.2) 10%, rgba(0,0,0,0.0));
            background: -o-linear-gradient(555% 0 180deg, rgba(0,0,0,0.1), rgba(0,0,0,0.2) 10%, rgba(0,0,0,0.0));
            background: -moz-linear-gradient(555% 0 180deg, rgba(0,0,0,0.1), rgba(0,0,0,0.2) 10%, rgba(0,0,0,0.0));
            border-left: 1px dashed rgba(0, 0, 0, 0.1);
            border-right: 1px dashed rgba(0, 0, 0, 0.1);
            -webkit-box-shadow: 0px 0px 12px rgba(0, 0, 0, 0.2);
            -moz-box-shadow: 0px 0px 12px rgba(0, 0, 0, 0.2);
            box-shadow: 0px 0px 12px rgba(0, 0, 0, 0.2);
            -webkit-transform: translate(50px,-20px) skew(10deg,10deg) rotate(-50deg);
            -moz-transform: translate(50px,-20px) skew(10deg,10deg) rotate(-50deg);
            -o-transform: translate(50px,-20px) skew(10deg,10deg) rotate(-50deg);
            transform: translate(50px,-20px) skew(10deg,10deg) rotate(-50deg)                            
        }
        
        /*==========Box8=========*/
        .box8{
            border: 2px solid #ccc;
            background: rgba(0, 0, 0, 0.5);
            -webkit-box-shadow: 0px 1px 12px rgba(0, 0, 0, 0.1);
            -moz-box-shadow: 0px 1px 12px rgba(0, 0, 0, 0.1);
            box-shadow: 0px 1px 12px rgba(0, 0, 0, 0.1);
        }

        .box8:before{
            content: '';
            width: 110%;
            left: 0; 
            height: 110%;
            z-index:-1;
            position:absolute;
            border: 1px solid #ccc;
            background: #f3f3f3;
            background: -webkit-gradient(linear, 0% 20%, 0% 92%, from(#f3f3f3), to(#fff), color-stop(.1,#f3f3f3));
            background: -webkit-linear-gradient(0 0 90deg, #f3f3f3, #f3f3f3 10%, #fff);
            background: -o-linear-gradient(0 0 90deg, #f3f3f3, #f3f3f3 10%, #fff);
            background: -moz-linear-gradient(0 0 90deg, #f3f3f3, #f3f3f3 10%, #fff);
            -webkit-box-shadow: 0px 0px 12px rgba(0, 0, 0, 0.1);
            -moz-box-shadow: 0px 0px 12px rgba(0,0,0,0.1);
            box-shadow: 0px 0px 12px rgba(0,0,0,0.1);
            -webkit-transform: translate(-5%,-5%);
            -moz-transform: translate(-5%, -5%);
            -o-transform: translate(-5%, -5%);
            transform: translate(-5%, -5%);
        }

        .box8:after{
            content: '';
            width: 100%;
            left: 0; 
            height: 79%;
            z-index:-2;
            background: none;
            position:absolute;
            -webkit-border-radius: 20px;
            -moz-border-radius: 20px;
            border-radius: 20px;
            -webkit-box-shadow: 15px 0px 30px rgba(0, 0, 0, 0.2);
            -moz-box-shadow: 15px 0px 30px rgba(0, 0, 0, 0.2);
            box-shadow: 15px 0px 30px rgba(0, 0, 0, 0.2);
            -webkit-transform: translate(0,0);
            -moz-transform: translate(0,0);
            -o-transform: translate(0,0);
            transform: translate(0,0);
        }
        
        /*=========Box9=======*/
        .box9{
            border: 1px solid rgba(0,0,0,0.1);
            -webkit-border-radius: 20px;
            -moz-border-radius: 20px;
            border-radius:20px;
            background: white;
            -webkit-box-shadow: 0px 0px 5px rgba(0, 0, 0, 0.3);
            -moz-box-shadow: 0px 0px 5px rgba(0,0,0,0.3);
            box-shadow:0px 0px 5px rgba(0,0,0,0.3);
        }
        /*底部的透明框效果*/
        .box9:before{
            content: '';
            width: 110%;
            left: 0; 
            height: 111%;
            z-index:-1;
            position:absolute;
            -webkit-border-radius: 20px;
            -moz-border-radius: 20px;
            border-radius:20px;
            border: 1px solid rgba(0,0,0, 0.1);
            background: rgba(0, 0, 0, 0.0);
            -webkit-box-shadow: 0px 0px 5px rgba(0, 0, 0, 0.2);
            -moz-box-shadow: 0px 0px 5px rgba(0,0,0,0.2);
            box-shadow: 0px 0px 5px rgba(0,0,0,0.2);
            -webkit-transform:     translate(-5%,-5%);
            -moz-transform: translate(-5%, -5%);
            -o-transform: translate(-5%, -5%);
            transform: translate(-5%, -5%);
        }
        /*这是框的顶部部分的粘带效果*/
        .box9:after{
            content: '';
            position:absolute;
            top:-25px; left: 30%;
            width: 130px;
            height: 40px;
            background: rgba(0, 0, 0, 0.1);
            background: -webkit-gradient(linear, 555% 20%, 0% 92%, from(rgba(0, 0, 0, 0.1)), to(rgba(0, 0, 0, 0.0)), color-stop(.1,rgba(0, 0, 0, 0.2)));
            background: -webkit-linear-gradient(555% 0 180deg, rgba(0,0,0,0.1), rgba(0,0,0,0.2) 10%, rgba(0,0,0,0.0));
            background: -o-linear-gradient(555% 0 180deg, rgba(0,0,0,0.1), rgba(0,0,0,0.2) 10%, rgba(0,0,0,0.0));
            background: -moz-linear-gradient(555% 0 180deg, rgba(0,0,0,0.1), rgba(0,0,0,0.2) 10%, rgba(0,0,0,0.0));
            border-left: 1px dashed rgba(0, 0, 0, 0.1);
            border-right: 1px dashed rgba(0, 0, 0, 0.1);
            -webkit-box-shadow: 0px 0px 12px rgba(0, 0, 0, 0.2);
            -moz-box-shadow: 0px 0px 12px rgba(0,0,0,0.2);
            box-shadow: 0px 0px 12px rgba(0,0,0,0.2);
        }
        /*=========Box10=====*/
        .box10{
            padding: 0 0 1px 0;
            background: #fff;
            background: -webkit-gradient(linear, 100% 100%, 50% 10%, from(#fff), to(#f3f3f3), color-stop(.1,#fff));
            background: -webkit-linear-gradient(100% 50%, #fff, #fff 10%, #f3f3f3);
            background: -o-linear-gradient(100% 50%, #fff, #fff 10%, #f3f3f3);
            background: -moz-linear-gradient(100% 50%, #fff, #fff 10%, #f3f3f3);
            border: 1px solid #ccc;
            -webkit-box-shadow: 1px 1px 4px rgba(0,0,0, 0.1);
            -moz-box-shadow: 1px 1px 4px rgba(0,0,0, 0.1);
            box-shadow: 1px 1px 4px rgba(0,0,0, 0.1);
            -moz-border-radius: 0 0 60px 0 / 0 0 5px 0;
            -webkit-border-radius: 0 0 60px 0 / 0 0 5px 0;
            border-radius: 0 0 60px 0 / 0 0 5px 0;
        }
        .box10:before{
            content: '';
            width: 98%;
            z-index:-1;
            height: 100%;
            padding: 0 0 1px 0;
            position: absolute;
            bottom:0; right:0;
            background: #fff;
            background: -webkit-gradient(linear, 0% 20%, 0% 92%, from(#fff), to(#f9f9f9), color-stop(.1,#fff));
            background: -webkit-linear-gradient(0 0 270deg, #fff, #fff 10%, #f9f9f9);
            background: -o-linear-gradient(0 0 270deg, #fff, #fff 10%, #f9f9f9);
            background: -moz-linear-gradient(0 0 270deg, #fff, #fff 10%, #f9f9f9);
            border: 1px solid #ccc;
            -webkit-box-shadow: 1px 1px 8px rgba(0,0,0, 0.1);
            -moz-box-shadow: 1px 1px 8px rgba(0,0,0,0.1);
            box-shadow: 1px 1px 8px rgba(0,0,0,0.1);
            -moz-border-radius: 0 0 60px 0 / 0 0 5px 0;
            -webkit-border-radius: 0 0 60px 0 / 0 0 5px 0;
            border-radius: 0 0 60px 0 / 0 0 5px 0;
            -webkit-transform: skew(2deg,2deg) translate(3px,8px);
            -moz-transform: skew(2deg,2deg) translate(3px,8px);
                -o-transform: skew(2deg,2deg) translate(3px,8px);
            transform: skew(2deg,2deg) translate(3px,8px);                        
        }
        .box10:after{
            content: '';
            width: 98%;
            z-index:-1;
            height: 98%;
            padding: 0 0 1px 0;
            position: absolute;
            bottom:0; right:0;
            background: #fff;
            background: -webkit-gradient(linear, 0% 20%, 0% 100%, from(#f3f3f3), to(#f6f6f6), color-stop(.1,#fff));
            background: -webkit-linear-gradient(0 0 360deg, #f3f3f3, #fff 10%, #f6f6f6);
            background: -o-linear-gradient(0 0 360deg, #f3f3f3, #fff 10%, #f6f6f6);
            background: -moz-linear-gradient(0 0 360deg, #f3f3f3, #fff 10%, #f6f6f6);
            border: 1px solid #ccc;
            -webkit-box-shadow: 0px 0px 8px rgba(0,0,0, 0.1);
            -moz-box-shadow: 0px 0px 8px rgba(0,0,0, 0.1);
            box-shadow: 0px 0px 8px rgba(0,0,0, 0.1);
            -webkit-transform: skew(2deg,2deg) translate(-1px,2px);
            -moz-transform: skew(2deg,2deg) translate(-1px,2px)    ;
                -o-transform: skew(2deg,2deg) translate(-1px,2px)    ;
            transform: skew(2deg,2deg) translate(-1px,2px)    ;                    
        }
        /*==========Box11========*/
        .box11{
            padding: 0 0 1px 0;
            background: #f3f3f3;
            background: -webkit-gradient(linear, 0% 20%, 0% 92%, from(#f3f3f3), to(#fff), color-stop(.1,#f3f3f3));
            background: -webkit-linear-gradient(0 0 270deg, #f3f3f3, #f3f3f3 10%, #fff);
            background: -o-linear-gradient(0 0 270deg, #f3f3f3, #f3f3f3 10%, #fff);
            background: -moz-linear-gradient(0 0 270deg, #f3f3f3, #f3f3f3 10%, #fff);
            border-top: 1px solid white;
            border-right: 1px solid #ccc;
            -webkit-border-radius: 0 0 60px 0;
            -moz-border-radius: 0 0 60px 0;
            border-radius: 0 0 60px 0;
            -webkit-box-shadow: -1px 2px 2px rgba(0, 0, 0, 0.2);
            -moz-box-shadow: -1px 2px 2px rgba(0,0,0,0.2);
            box-shadow: -1px 2px 2px rgba(0,0,0,0.2);
        }
        .box11:before{
            content:'';    
            width: 25px;
            height: 20px;
            background: white;
            position: absolute;
            bottom:0; right:0;
            background:#fff;
            background: -webkit-gradient(linear, 0% 20%, 50% 40%, from(#fff), to( #eee), color-stop(.1,#fff));
            background: -webkit-linear-gradient(0 50%, #fff, #fff 10%, #eee);
            background: -o-linear-gradient(0 50%, #fff, #fff 10%, #eee);
            background: -moz-linear-gradient(0 50%, #fff, #fff 10%, #eee);
            -webkit-border-radius: 0 0 30px 0;
            -moz-border-radius: 0 0 30px 0;
            border-radius: 0 0 30px 0;
            -webkit-box-shadow: -2px -2px 5px rgba(0, 0, 0, 0.3);
            -moz-box-shadow: -2px -2px 5px rgba(0,0,0,0.3);
            box-shadow: -2px -2px 5px rgba(0, 0, 0, 0.3);
            -webkit-transform: rotate(-20deg) skew(-40deg,-3deg) translate(-13px,-13px);
            -moz-transform: rotate(-20deg) skew(-40deg,-3deg) translate(-13px,-13px);
            -o-transform: rotate(-20deg) skew(-40deg,-3deg) translate(-13px,-13px);
            transform: rotate(-20deg) skew(-40deg,-3deg) translate(-13px,-13px);
        }

        .box11:after{
            content: '';
            z-index: -1;
            width: 100px;
            height: 100px;
            position:absolute;
            bottom:0;
            right:0;
            background: rgba(0, 0, 0, 0.2);
            display: inline-block;
            -webkit-box-shadow: 20px 20px 8px rgba(0, 0, 0, 0.2);
            -moz-box-shadow: 20px 20px 17px rgba(0,0,0,0.2);
            box-shadow: 20px 20px 17px rgba(0,0,0,0.2);
            -webkit-transform: rotate(0deg) translate(-45px,-20px) skew(20deg);
            -moz-transform: rotate(0deg) translate(-40px,-17px) skew(20deg);
            -o-transform: rotate(0deg) translate(-40px,-17px) skew(20deg);
            transform: rotate(0deg) translate(-40px,-17px) skew(20deg);                        
        }


        .box11 .ribbon{
            position:absolute;
            top:-25px; left: 30%;
            width: 130px;
            height: 40px;
            background:#ccc;
            background: -webkit-gradient(linear, 555% 20%, 0% 92%, from(rgba(0, 0, 0, 0.1)), to(rgba(0, 0, 0, 0.0)), color-stop(.1,rgba(0, 0, 0, 0.2)));
            background: -webkit-linear-gradient(555% 0 180deg, rgba(0,0,0,0.1), rgba(0,0,0,0.2) 10%, rgba(0,0,0,0.0));
            background: -o-linear-gradient(555% 0 180deg, rgba(0,0,0,0.1), rgba(0,0,0,0.2) 10%, rgba(0,0,0,0.0));
            background: -moz-linear-gradient(555% 0 180deg, rgba(0,0,0,0.1), rgba(0,0,0,0.2) 10%, rgba(0,0,0,0.0));
            border-left: 1px dashed rgba(0, 0, 0, 0.1);
            border-right: 1px dashed rgba(0, 0, 0, 0.1);
            -webkit-box-shadow: 0px 0px 12px rgba(0, 0, 0, 0.2);
            -moz-box-shadow: 0px 0px 12px rgba(0, 0, 0, 0.2);
            box-shadow: 0px 0px 12px rgba(0, 0, 0, 0.2);
        }
        
        /*========Box 12========*/
        .box12{
            padding: 0 0 1px 0;
            background:#f3f3f3;
            background: -webkit-gradient(linear, 0% 20%, 0% 92%, from(#f3f3f3), to(#fff), color-stop(.1,#f3f3f3));
            background: -webkit-linear-gradient(0 0 270deg, #f3f3f3, #f3f3f3 10%, #fff);
            background: -o-linear-gradient(0 0 270deg, #f3f3f3, #f3f3f3 10%, #fff);
            background: -moz-linear-gradient(0 0 270deg, #f3f3f3, #f3f3f3 10%, #fff);
            border-top: 1px solid #ccc;
            border-right: 1px solid #ccc;
            -webkit-border-radius: 0  0 60px 60px;
            -moz-border-radius: 0  0 60px 60px;
            border-radius: 0  0 60px 60px;
            -webkit-box-shadow: -1px 2px 2px rgba(0, 0, 0, 0.2);
            -moz-box-shadow: -1px 2px 2px rgba(0, 0, 0, 0.2);
            box-shadow: -1px 2px 2px rgba(0, 0, 0, 0.2);
        }

        .box12:before{
            content:'';    
            width: 25px;
            height: 20px;
            background: white;
            position: absolute;
            bottom:0; right:0;
            background: -webkit-gradient(linear, 0% 20%, 50% 40%, from(#fff), to( #eee), color-stop(.1,#fff));
            background: -webkit-linear-gradient(0 50%, #fff, #fff 10%, #eee);
            background: -o-linear-gradient(0 50%, #fff, #fff 10%, #eee);
            background: -moz-linear-gradient(0 50%, #fff, #fff 10%, #eee);
            -webkit-border-radius: 0 0 30px 0;
            -moz-border-radius: 0 0 30px 0;
            border-radius: 0 0 30px 0;    
            -webkit-box-shadow: -2px -2px 5px rgba(0, 0, 0, 0.3);
            -moz-box-shadow: -2px -2px 5px rgba(0, 0, 0, 0.3);
            box-shadow: -2px -2px 5px rgba(0, 0, 0, 0.3);
            -webkit-transform: rotate(-20deg) skew(-40deg,-3deg) translate(-13px,-13px);
            -moz-transform: rotate(-20deg) skew(-40deg,-3deg) translate(-13px,-13px);    
            -o-transform: rotate(-20deg) skew(-40deg,-3deg) translate(-13px,-13px);                            
            transform: rotate(-20deg) skew(-40deg,-3deg) translate(-13px,-13px);                    
        }

        .box12:after{
            content: '';
            z-index: -10;
            width: 100px;
            height: 100px;
            position:absolute;
            bottom:0;
            right:0;
            background: rgba(0, 0, 0, 0.2);
            display: inline-block;
            -webkit-box-shadow: 20px 20px 8px rgba(0, 0, 0, 0.2);
            -moz-box-shadow: 20px 20px 17px rgba(0, 0, 0, 0.2);
            box-shadow: 20px 20px 8px rgba(0, 0, 0, 0.2);
            -webkit-transform: rotate(0deg) translate(-45px,-20px) skew(20deg);
            -moz-transform: rotate(0deg) translate(-40px,-17px) skew(20deg);
            -o-transform: rotate(0deg) translate(-40px,-17px) skew(20deg);                        
            transform: rotate(0deg) translate(-45px,-20px) skew(20deg);                    
        }
        .box12 .shBlFlod{
            z-index: -10;
            width: 50px;
            height: 50px;
            position:absolute;
            bottom:0; left:0;
            -webkit-box-shadow: -20px 20px 8px rgba(0, 0, 0, 0.2);
            -moz-box-shadow: -20px 20px 17px rgba(0, 0, 0, 0.2);    
            box-shadow: -20px 20px 8px rgba(0, 0, 0, 0.2);
            -webkit-transform: rotate(0deg) translate(40px,-20px) skew(-20deg);
            -moz-transform: rotate(0deg) translate(40px,-17px) skew(-20deg);
            -o-transform: rotate(0deg) translate(40px,-17px) skew(-20deg);                        
            transform: rotate(0deg) translate(40px,-20px) skew(-20deg);                    
        }
        .box12 .shBl{
            width: 25px;
            height: 20px;
            z-index:20;
            background: white;
            position: absolute;
            bottom:0; left:0;
            background: -webkit-gradient(linear, 0% 20%, 50% 80%, from(#fff), to( #eee), color-stop(.1,#fff));
            background: -webkit-linear-gradient(0 50%, #fff, #fff 10%, #eee);
            background: -o-linear-gradient(0 50%, #fff, #fff 10%, #eee);
            background: -moz-linear-gradient(0 50%, #fff, #fff 10%, #eee);
            -webkit-border-radius: 0 0 30px 0;
            -moz-border-radius: 0 0 30px 0;
            border-radius: 0 0 30px 0;
            -webkit-box-shadow: -2px -2px 5px rgba(0, 0, 0, 0.3);
            -moz-box-shadow: -2px -2px 5px rgba(0, 0, 0, 0.3);
            box-shadow: -2px -2px 5px rgba(0, 0, 0, 0.3);
            -webkit-transform: rotate(103deg) skew(-3deg,-40deg) translate(-13px,-15px);
            -moz-transform: rotate(103deg) skew(-3deg,-40deg) translate(-13px,-15px);    
            -o-transform: rotate(103deg) skew(-3deg,-40deg) translate(-13px,-15px);                            
            transform: rotate(103deg) skew(-3deg,-40deg) translate(-13px,-15px);                    
        }

        .box12 .ribbon{
            content: '';
            position:absolute;
            top:-25px; left: 30%;
            width: 130px;
            height: 40px;
            background: #ccc;
            background: -webkit-gradient(linear, 555% 20%, 0% 92%, from(rgba(0, 0, 0, 0.1)), to(rgba(0, 0, 0, 0.0)), color-stop(.1,rgba(0, 0, 0, 0.2)));
            background: -webkit-linear-gradient(555% 0% 180deg, rgba(0,0,0,0.1), rgba(0,0,0,0.2) 10%, rgba(0,0,0,0.0));
            background: -o-linear-gradient(555% 0% 180deg, rgba(0,0,0,0.1), rgba(0,0,0,0.2) 10%, rgba(0,0,0,0.0));
            background: -moz-linear-gradient(555% 0% 180deg, rgba(0,0,0,0.1), rgba(0,0,0,0.2) 10%, rgba(0,0,0,0.0));
            border-left: 1px dashed rgba(0, 0, 0, 0.1);
            border-right: 1px dashed rgba(0, 0, 0, 0.1);
            -webkit-box-shadow: 0px 0px 12px rgba(0, 0, 0, 0.2);
            -moz-box-shadow: 0px 0px 12px rgba(0, 0, 0, 0.2);
            box-shadow: 0px 0px 12px rgba(0, 0, 0, 0.2);
        }
        /*=======Box 13=====*/
        .box13{
            padding: 0 0 1px 0;
            background:#fff;
            background: -webkit-gradient(linear, 0% 20%, 0% 92%, from(#fff), to(#f3f3f3), color-stop(.1,#fff));
            background: -webkit-linear-gradient(0% 0% 270deg, #fff, #fff 10%, #f3f3f3);
            background: -o-linear-gradient(0% 0% 270deg, #fff, #fff 10%, #f3f3f3);
            background: -moz-linear-gradient(0% 0% 270deg, #fff, #fff 10%, #f3f3f3);
            border-top: 1px solid #ccc;
            border-right: 1px solid #ccc;
            border-left: 1px solid #ccc;
            -webkit-border-radius: 60px 60px 60px 0 / 5px 5px 60px 0;
            -moz-border-radius: 60px 60px 60px 0 / 5px 5px 60px 0;
            border-radius: 60px 60px 60px 0 / 5px 5px 60px 0;
            -webkit-box-shadow: 0px 0px 12px rgba(0, 0, 0, 0.3) ;
            -moz-box-shadow: 0px 0px 12px rgba(0, 0, 0, 0.3) ;
            box-shadow: 0px 0px 12px rgba(0, 0, 0, 0.3) ;
        }
        .box13:before{
            content:'';    
            width: 25px;
            height: 20px;
            position: absolute;
            bottom:0;
            right:0;
            -webkit-border-radius: 0 0 30px 0;
            -moz-border-radius: 0 0 30px 0;
            border-radius: 0 0 30px 0;
            -webkit-box-shadow: -2px -2px 5px rgba(0, 0, 0, 0.3);
            -moz-box-shadow: -2px -2px 5px rgba(0, 0, 0, 0.3);
            box-shadow: -2px -2px 5px rgba(0, 0, 0, 0.3);
            -webkit-transform: rotate(-20deg) skew(-40deg,-3deg) translate(-13px,-13px);
            -moz-transform:    rotate(-20deg) skew(-40deg,-3deg) translate(-13px,-13px);
            -o-transform:    rotate(-20deg) skew(-40deg,-3deg) translate(-13px,-13px);                    
            transform:    rotate(-20deg) skew(-40deg,-3deg) translate(-13px,-13px);                
        }
        .box13:after{
            content: '';
            z-index: -10;
            width: 100px;
            height: 100px;
            position:absolute;
            bottom:0;
            right:0;
            background: rgba(0, 0, 0, 0.2);
            display: inline-block;
            -webkit-box-shadow: 20px 20px 8px rgba(0, 0, 0, 0.2);
            -moz-box-shadow: 20px 20px 18px rgba(0, 0, 0, 0.2);
            box-shadow: 20px 20px 8px rgba(0, 0, 0, 0.2);
            -webkit-transform: rotate(0deg) translate(-45px,-20px) skew(20deg);
            -moz-transform: rotate(0deg) translate(-45px,-20px) skew(20deg);
            -o-transform: rotate(0deg) translate(-45px,-20px) skew(20deg);                        
            transform: rotate(0deg) translate(-45px,-20px) skew(20deg);                    
        }
        .box13 .cornerLf{
            width: 100px;
            height: 100px;
            top:0; left:0;
            position:absolute;
            z-index:-6;
            display: inline-block;
            -webkit-box-shadow: -10px -10px 10px rgba(0, 0, 0, 0.2);
            -moz-box-shadow: -10px -10px 10px rgba(0, 0, 0, 0.2);
            box-shadow: -10px -10px 10px rgba(0, 0, 0, 0.2);
            -webkit-transform: rotate(2deg) translate(20px,25px) skew(20deg);
            -moz-transform: rotate(2deg) translate(20px,25px) skew(20deg);
            -o-transform: rotate(2deg) translate(20px,25px) skew(20deg);                        
            transform: rotate(2deg) translate(20px,25px) skew(20deg);                
        }

        .box13 .cornerRt{
            content: '';
            width: 50px;
            height: 50px;
            top:0; right:0;
            position:absolute;
            display: inline-block;
            z-index:-6;
            -webkit-box-shadow: 10px -10px 8px rgba(0, 0, 0, 0.2);
            -moz-box-shadow: 10px -10px 8px rgba(0, 0, 0, 0.2);
            box-shadow: 10px -10px 8px rgba(0, 0, 0, 0.2);
            -webkit-transform: rotate(2deg) translate(-14px,20px) skew(-20deg);
            -moz-transform: rotate(2deg) translate(-14px,20px) skew(-20deg);
            -o-transform: rotate(2deg) translate(-14px,20px) skew(-20deg);                            
            transform: rotate(2deg) translate(-14px,20px) skew(-20deg);                    
        }

        .box13 .ribbon:before{
            content: '';
            position:absolute;
            top:0; left: 0;
            width: 130px;
            height: 40px;
            background:rgba(0,0,0,0.2);
            background: -webkit-gradient(linear, 555% 20%, 0% 92%, from(rgba(0, 0, 0, 0.1)), to(rgba(0, 0, 0, 0.0)), color-stop(.1,rgba(0, 0, 0, 0.2)));
            background: -webkit-linear-gradient(555% 0% 180deg, rgba(0,0,0,0.1), rgba(0,0,0,0.2) 10%, rgba(0,0,0,0.0));
            background: -o-linear-gradient(555% 0% 180deg, rgba(0,0,0,0.1), rgba(0,0,0,0.2) 10%, rgba(0,0,0,0.0));
            background: -moz-linear-gradient(555% 0% 180deg, rgba(0,0,0,0.1), rgba(0,0,0,0.2) 10%, rgba(0,0,0,0.0));
            border-left: 1px dashed rgba(0, 0, 0, 0.1);
            border-right: 1px dashed rgba(0, 0, 0, 0.1);
            -webkit-box-shadow: 0px 0px 12px rgba(0, 0, 0, 0.2);
            -moz-box-shadow: 0px 0px 12px rgba(0, 0, 0, 0.2);
            box-shadow: 0px 0px 12px rgba(0, 0, 0, 0.2);
            -webkit-transform: rotate(90deg) skew(0,0) translate(100px,65px);
            -moz-transform: rotate(90deg) skew(0,0) translate(100px,65px);
            -o-transform: rotate(90deg) skew(0,0) translate(100px,65px);    
            transform: rotate(90deg) skew(0,0) translate(100px,65px);
        }
        .box13 .ribbon:after{
            content: '';
            position:absolute;
            top:0; right: 0;
            width: 130px;
            height: 40px;
            background:rgba(0, 0, 0, 0.1);
            background: -webkit-gradient(linear, 555% 20%, 0% 92%, from(rgba(0, 0, 0, 0.1)), to(rgba(0, 0, 0, 0.0)), color-stop(.1,rgba(0, 0, 0, 0.2)));
            background: -webkit-linear-gradient(555% 0% 180deg, rgba(0,0,0,0.1), rgba(0,0,0,0.2) 10%, rgba(0,0,0,0.0));
            background: -o-linear-gradient(555% 0% 180deg, rgba(0,0,0,0.1), rgba(0,0,0,0.2) 10%, rgba(0,0,0,0.0));
            background: -moz-linear-gradient(555% 0% 180deg, rgba(0,0,0,0.1), rgba(0,0,0,0.2) 10%, rgba(0,0,0,0.0));
            border-left: 1px dashed rgba(0, 0, 0, 0.1);
            border-right: 1px dashed rgba(0, 0, 0, 0.1);
            -webkit-box-shadow: 0px 0px 12px rgba(0, 0, 0, 0.2);
            -moz-box-shadow: 0px 0px 12px rgba(0, 0, 0, 0.2);
            box-shadow: 0px 0px 12px rgba(0, 0, 0, 0.2);
            -webkit-transform: rotate(90deg) skew(0,0) translate(100px,-65px);
            -moz-transform: rotate(90deg) skew(0,0) translate(100px,-65px);
            -o-transform: rotate(90deg) skew(0,0) translate(100px,-65px);
            transform: rotate(90deg) skew(0,0) translate(100px,-65px);
        }
        
        /*==========Box14=========*/
        .box14{
            padding: 5px 0 ;
            background:#fff;
            background: -webkit-gradient(linear, 0% 20%, 0% 92%, from(#fff), to(#f3f3f3), color-stop(.1,#fff));
            background: -wbkit-linear-gradient(0% 0% 270deg, #fff, #fff 10%, #f3f3f3);
            background: -o-linear-gradient(0% 0% 270deg, #fff, #fff 10%, #f3f3f3);
            background: -moz-linear-gradient(0% 0% 270deg, #fff, #fff 10%, #f3f3f3);
            border: 1px solid #ccc;
            -webkit-border-radius: 60px 5px;
            -moz-border-radius: 60px/5px;
            border-radius: 60px/5px;
            -webkit-box-shadow: 0px 0px 35px rgba(0, 0, 0, 0.1) inset;
            -moz-box-shadow: 0px 0px 35px rgba(0, 0, 0, 0.1) inset;
            box-shadow: 0px 0px 35px rgba(0, 0, 0, 0.1) inset;
        }

        .box14:before{
            content: '';
            width: 50px;
            height: 50px;
            top:0; right:0;
            position:absolute;
            display: inline-block;
            z-index:-1;
            -webkit-box-shadow: 10px -10px 8px rgba(0, 0, 0, 0.2);
            -moz-box-shadow: 10px -10px 8px rgba(0, 0, 0, 0.2);
            box-shadow: 10px -10px 8px rgba(0, 0, 0, 0.2);
            -webkit-transform: rotate(2deg) translate(-14px,20px) skew(-20deg);
            -moz-transform: rotate(2deg) translate(-14px,20px) skew(-20deg);
            -o-transform: rotate(2deg) translate(-14px,20px) skew(-20deg);                        
            transform: rotate(2deg) translate(-14px,20px) skew(-20deg);
        }

        .box14:after{
            content: '';
            width: 100px;
            height: 100px;
            top:0; left:0;
            position:absolute;
            z-index:-1;
            display: inline-block;
            -webkit-box-shadow: -10px -10px 10px rgba(0, 0, 0, 0.2);
            -moz-box-shadow: -10px -10px 10px rgba(0, 0, 0, 0.2);
            box-shadow: -10px -10px 10px rgba(0, 0, 0, 0.2);    
            -webkit-transform: rotate(2deg) translate(20px,25px) skew(20deg);
            -moz-transform:  rotate(2deg) translate(20px,25px) skew(20deg);
            -o-transform:  rotate(2deg) translate(20px,25px) skew(20deg);                        
            transform:  rotate(2deg) translate(20px,25px) skew(20deg);
        }

        .box14 .ribbon{
            position:absolute;
            top:0; right: 0;
            width: 130px;
            height: 40px;
            background: rgba(0, 0, 0, 0.1);
            background: -webkit-gradient(linear, 555% 20%, 0% 92%, from(rgba(0, 0, 0, 0.1)), to(rgba(0, 0, 0, 0.0)), color-stop(.1,rgba(0, 0, 0, 0.2)));
            background: -moz-linear-gradient(555% 0% 180deg, rgba(0,0,0,0.1), rgba(0,0,0,0.2) 10%, rgba(0,0,0,0.0));
            border-left: 1px dashed rgba(0, 0, 0, 0.1);
            border-right: 1px dashed rgba(0, 0, 0, 0.1);
            -webkit-box-shadow: 0px 0px 12px rgba(0, 0, 0, 0.2);
            -moz-box-shadow: 0px 0px 12px rgba(0,0,0,0.2);
            box-shadow: 0px 0px 12px rgba(0,0,0,0.2);
            -webkit-transform: rotate(6deg) skew(0,0) translate(-60%,-5px);
            -moz-transform: rotate(6deg) skew(0,0) translate(-60%,-5px);
            -o-transform: rotate(6deg) skew(0,0) translate(-60%,-5px);
            transform: rotate(6deg) skew(0,0) translate(-60%,-5px);
        }
        
        /*=========BOX15======*/
        .box15{
            padding: 0 0 1px 0;
            background:#fff;
            background: -webkit-gradient(linear, 100% 100%, 50% 10%, from(#fff), to(#f3f3f3), color-stop(.1,#fff));
            background: -webkit-linear-gradient(100% 50% 90deg, #fff, #fff 10%, #f3f3f3);
            background: -o-linear-gradient(100% 50% 90deg, #fff, #fff 10%, #f3f3f3);
            background: -moz-linear-gradient(100% 50% 90deg, #fff, #fff 10%, #f3f3f3);
            border: 1px solid #ccc;
            -webkit-box-shadow: 1px 1px 4px rgba(0,0,0, 0.1);
            -moz-box-shadow: 1px 1px 4px rgba(0,0,0,0.1);
            box-shadow: 1px 1px 4px rgba(0,0,0,0.1);
            -webkit-border-radius: 0 0 60px 0 / 0 0 5px 0;
            -moz-border-radius: 0 0 60px 0 / 0 0 5px 0;    
            border-radius: 0 0 60px 0 / 0 0 5px 0;    
        }

        .box15:before{
            content: '';
            width: 98%;
            z-index:-1;
            height: 100%;
            padding: 0 0 1px 0;
            position: absolute;
            bottom:0; right:0;
            background: #fff;
            background: -webkit-gradient(linear, 0% 20%, 0% 92%, from(#fff), to(#f9f9f9), color-stop(.1,#fff));
            background: -webkit-linear-gradient(0 0 270deg, #fff, #fff 10%, #f9f9f9);
            background: -o-linear-gradient(0 0 270deg, #fff, #fff 10%, #f9f9f9);
            background: -moz-linear-gradient(0 0 270deg, #fff, #fff 10%, #f9f9f9);
            border: 1px solid #ccc;
            -webkit-box-shadow: 1px 1px 8px rgba(0,0,0, 0.1);
            -moz-box-shadow: 1px 1px 8px rgba(0,0,0,0.1);
            box-shadow: 1px 1px 8px rgba(0,0,0,0.1);
            -webkit-border-radius: 0 0 60px 0 / 0 0 5px 0;
            -moz-border-radius: 0 0 60px 0 / 0 0 5px 0;    
            border-radius: 0 0 60px 0 / 0 0 5px 0;
            -webkit-transform: skew(2deg,2deg) translate(3px,8px);
            -moz-transform: skew(2deg,2deg) translate(3px,8px);
            -o-transform: skew(2deg,2deg) translate(3px,8px);                        
            transform: skew(2deg,2deg) translate(3px,8px);
        }
        .box15:after{
            content: '';
            width: 98%;
            z-index:-1;
            height: 98%;
            padding: 0 0 1px 0;
            position: absolute;
            bottom:0; right:0;
            background: #f3f3f3;
            background: -webkit-gradient(linear, 0% 20%, 0% 100%, from(#f3f3f3), to(#f6f6f6), color-stop(.1,#fff));
            background: -webkit-linear-gradient(0% 0% 360deg, #f3f3f3, #fff, #f6f6f6);
            background: -o-linear-gradient(0% 0% 360deg, #f3f3f3, #fff, #f6f6f6);
            background: -moz-linear-gradient(0% 0% 360deg, #f3f3f3, #fff, #f6f6f6);
            border: 1px solid #ccc;
            -webkit-box-shadow: 0px 0px 8px rgba(0,0,0, 0.1);
            -moz-box-shadow: 0px 0px 8px rgba(0,0,0,0.1);
            box-shadow: 0px 0px 8px rgba(0,0,0,0.1);
            -webkit-transform: skew(2deg,2deg) translate(-1px,2px);
            -moz-transform: skew(2deg,2deg) translate(-1px,2px);
            -o-transform: skew(2deg,2deg) translate(-1px,2px);                        
            transform: skew(2deg,2deg) translate(-1px,2px);
        }

        .box15 .ribbon{
            position:absolute;
            top:0; left: 0;
            width: 130px;
            height: 40px;
            background:rgba(0, 0, 0, 0.1);
            background: -webkit-gradient(linear, 555% 20%, 0% 92%, from(rgba(0, 0, 0, 0.1)), to(rgba(0, 0, 0, 0.0)), color-stop(.1,rgba(0, 0, 0, 0.2)));
            background: -webkit-linear-gradient(555% 0 180deg, rgba(0,0,0,0.1), rgba(0,0,0,0.2) 10%, rgba(0,0,0,0.0));
            background: -o-linear-gradient(555% 0 180deg, rgba(0,0,0,0.1), rgba(0,0,0,0.2) 10%, rgba(0,0,0,0.0));
            background: -moz-linear-gradient(555% 0 180deg, rgba(0,0,0,0.1), rgba(0,0,0,0.2) 10%, rgba(0,0,0,0.0));
            border-left: 1px dashed rgba(0, 0, 0, 0.1);
            border-right: 1px dashed rgba(0, 0, 0, 0.1);
            -webkit-box-shadow: 0px 0px 12px rgba(0, 0, 0, 0.2);
            -moz-box-shadow: 0px 0px 12px rgba(0,0,0,0.2);
            box-shadow: 0px 0px 12px rgba(0,0,0,0.2);
            -webkit-transform: rotate(-30deg) skew(0,0) translate(-30px,-20px);
            -moz-transform: rotate(-30deg) skew(0,0) translate(-30px,-20px);
            -o-transform: rotate(-30deg) skew(0,0) translate(-30px,-20px);
            transform: rotate(-30deg) skew(0,0) translate(-30px,-20px);
        }

转自：http://www.w3cplus.com/css3/box-drop-down-shadow-with-css3

源代码：http://jsfiddle.net/w3cplus/javeL/