一款基于css3和jquery实现的动画弹出层

   <div class="papersheet">
        <!-- Action Trigger -->
        <div class="papersheet__trigger">
            <!-- Icon -->
            <svg class="papersheet__trigger-icon" viewbox="0 0 24 24"><g transform="scale(0.023 0.023)"><path d="M1014.662 822.66c-0.004-0.004-0.008-0.008-0.012-0.010l-310.644-310.65 310.644-310.65c0.004-0.004 0.008-0.006 0.012-0.010 3.344-3.346 5.762-7.254 7.312-11.416 4.246-11.376 1.824-24.682-7.324-33.83l-146.746-146.746c-9.148-9.146-22.45-11.566-33.828-7.32-4.16 1.55-8.070 3.968-11.418 7.31 0 0.004-0.004 0.006-0.008 0.010l-310.648 310.652-310.648-310.65c-0.004-0.004-0.006-0.006-0.010-0.010-3.346-3.342-7.254-5.76-11.414-7.31-11.38-4.248-24.682-1.826-33.83 7.32l-146.748 146.748c-9.148 9.148-11.568 22.452-7.322 33.828 1.552 4.16 3.97 8.072 7.312 11.416 0.004 0.002 0.006 0.006 0.010 0.010l310.65 310.648-310.65 310.652c-0.002 0.004-0.006 0.006-0.008 0.010-3.342 3.346-5.76 7.254-7.314 11.414-4.248 11.376-1.826 24.682 7.322 33.83l146.748 146.746c9.15 9.148 22.452 11.568 33.83 7.322 4.16-1.552 8.070-3.97 11.416-7.312 0.002-0.004 0.006-0.006 0.010-0.010l310.648-310.65 310.648 310.65c0.004 0.002 0.008 0.006 0.012 0.008 3.348 3.344 7.254 5.762 11.414 7.314 11.378 4.246 24.684 1.826 33.828-7.322l146.746-146.748c9.148-9.148 11.57-22.454 7.324-33.83-1.552-4.16-3.97-8.068-7.314-11.414z"></path></g></svg>
        </div>
        <!-- Face 1 -->
        <div class="papersheet__face-item animated fadeInUp">
            <img src="128.jpg" alt="" />
        </div>
        <!-- Face 2 -->
        <div class="papersheet__face-item animated fadeInUp">
            <img src="129.jpg" alt="" />
        </div>
        <!-- Face 2 -->
        <div class="papersheet__face-item animated fadeInUp">
            <img src="130.jpg" alt="" />
        </div>
    </div>
    <script src=‘jquery.js‘></script>
    <script>
        _papersheet = $(‘.papersheet‘);
        _trigger = $(‘.papersheet__trigger‘);
        _trigger.click(function () {
            if (_papersheet.hasClass(‘opened‘)) {
                $(this).parent(‘.papersheet‘).stop().removeClass(‘opened‘);
            } else {
                $(this).parent(‘.papersheet‘).stop().addClass(‘opened‘);
            }
        });
        //@ sourceURL=pen.js
    </script>

  @import url("http://daneden.github.io/animate.css/animate.min.css");
        :root
        {
            width: 100%;
            height: 100%;
        }
        body
        {
            width: 100%;
            height: 100%;
            display: -webkit-flex;
            display: -ms-flexbox;
            display: flex;
            -webkit-align-items: center;
            -ms-flex-align: center;
            align-items: center;
            -webkit-justify-content: center;
            -ms-flex-pack: center;
            justify-content: center;
            overflow: hidden;
            background-color: #263238;
        }
        .papersheet
        {
            position: relative;
            overflow: hidden;
            text-align: center;
            -moz-box-sizing: border-box;
            box-sizing: border-box;
            -webkit-transition: all 200ms;
            transition: all 200ms;
            width: 100%;
            height: 100%;
            max-width: 50%;
            min-width: 50rem;
            max-height: 50%;
            min-height: 20rem;
            margin: 0 auto;
            display: -webkit-flex;
            display: -ms-flexbox;
            display: flex;
            -webkit-align-items: center;
            -ms-flex-align: center;
            align-items: center;
            -webkit-justify-content: center;
            -ms-flex-pack: center;
            justify-content: center;
        }
        .papersheet.opened
        {
            -webkit-transition: all 900ms;
            transition: all 900ms;
            box-shadow: 0px 5px 20px rgba(0, 0, 0, 0.5);
        }
        .papersheet__trigger
        {
            z-index: 1;
            display: inline-block;
            padding: 2rem;
            border-radius: 50%;
            position: absolute;
            background-color: transparent;
            top: 50%;
            left: 50%;
            -webkit-transform: translate(-50%, -50%);
            -ms-transform: translate(-50%, -50%);
            transform: translate(-50%, -50%);
            -webkit-transition: all 800ms cubic-bezier(0.19, 1, 0.22, 1);
            transition: all 800ms cubic-bezier(0.19, 1, 0.22, 1);
            cursor: pointer;
        }
        .opened .papersheet__trigger
        {
            background-color: #eceff1;
            top: 10%;
        }
        .papersheet__trigger:hover
        {
            box-shadow: 0px 5px 20px rgba(0, 0, 0, 0.5);
        }
        .papersheet__trigger:active:before
        {
            background-color: #d5d5d5;
        }
        .papersheet__trigger:before
        {
            content: "";
            background-color: #eceff1;
            display: block;
            position: absolute;
            border-radius: 50%;
            top: 50%;
            left: 50%;
            bottom: 50%;
            right: 50%;
            width: 6rem;
            height: 6rem;
            z-index: 0;
            pointer-events: none;
            -webkit-transform: translate(-50%, -50%);
            -ms-transform: translate(-50%, -50%);
            transform: translate(-50%, -50%);
            -webkit-transition-delay: 2s;
            transition-delay: 2s;
            -webkit-transition: all 400ms cubic-bezier(0.165, 0.84, 0.44, 1);
            transition: all 400ms cubic-bezier(0.165, 0.84, 0.44, 1);
        }
        .opened .papersheet__trigger:before
        {
            width: 3000px;
            height: 3000px;
            -webkit-transition: all 2.5s cubic-bezier(0.165, 0.84, 0.44, 1);
            transition: all 2.5s cubic-bezier(0.165, 0.84, 0.44, 1);
        }
        .papersheet__trigger-icon
        {
            fill: #37474f;
            vertical-align: bottom;
            -webkit-transform: rotate(45deg);
            -ms-transform: rotate(45deg);
            transform: rotate(45deg);
            -webkit-transition: all 800ms cubic-bezier(0.19, 1, 0.22, 1);
            transition: all 800ms cubic-bezier(0.19, 1, 0.22, 1);
            -webkit-transition-delay: 50ms;
            transition-delay: 50ms;
            width: 1.8rem;
            height: 1.8rem;
        }
        .opened .papersheet__trigger-icon
        {
            -webkit-transform: rotate(-360deg);
            -ms-transform: rotate(-360deg);
            transform: rotate(-360deg);
        }
        .papersheet__face-item
        {
            border-radius: 50%;
            margin: 0 1.5rem;
            z-index: 1;
            height: 6rem;
            width: 6rem;
            display: none;
            overflow: hidden;
        }
        .papersheet__face-item:nth-child(2)
        {
            -webkit-animation-delay: 50ms;
            animation-delay: 50ms;
        }
        .papersheet__face-item:nth-child(3)
        {
            -webkit-animation-delay: 150ms;
            animation-delay: 150ms;
        }
        .papersheet__face-item:nth-child(4)
        {
            -webkit-animation-delay: 250ms;
            animation-delay: 250ms;
        }
        .papersheet__face-item img
        {
            max-width: 100%;
        }
        .opened .papersheet__face-item
        {
            -webkit-transform: translateX(60%);
            -ms-transform: translateX(60%);
            transform: translateX(60%);
            display: block;
        }