body {
    background: #fff;
}

h1 {
    font-size: 42px;
    text-align: center;
}

a {
    text-decoration: none;
}

a:hover, a:focus, a:active {
    text-decoration: none;
}

input{
    margin: 3px;
    padding: 10px;
    width: 290px;
    height: 30px;
}

/* 居中 */
.content {
    text-align: center; /*让div内部文字居中*/
    background-color: #fff;
    border-radius: 20px;
    width: 400px;
    height: 450px;
    margin: auto;
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
}

/* Mixins */
/* bg shortcodes */
.bg-gradient1 span, .bg-gradient1:before {
    background: #52A0FD;
    background: -webkit-linear-gradient(left, #52A0FD 0%, #00e2fa 80%, #00e2fa 100%);
    background: linear-gradient(to right, #52A0FD 0%, #00e2fa 80%, #00e2fa 100%);
}

.bg-gradient2 span, .bg-gradient2:before {
    background: #44ea76;
    background: -webkit-linear-gradient(left, #44ea76 0%, #39fad7 80%, #39fad7 100%);
    background: linear-gradient(to right, #44ea76 0%, #39fad7 80%, #39fad7 100%);
}

.bg-gradient3 span, .bg-gradient3:before {
    background: #fa6c9f;
    background: -webkit-linear-gradient(left, #fa6c9f 0%, #ffe140 80%, #ffe140 100%);
    background: linear-gradient(to right, #fa6c9f 0%, #ffe140 80%, #ffe140 100%);
}

/* General */
.wrapper {
    margin: 5% auto;
    text-align: center;
}

/* fancy Button */
.fancy-button {
    display: inline-block;
    margin: 30px;
    font-family: 'Montserrat', Helvetica, Arial, sans-serif;
    font-size: 18px;
    letter-spacing: 0.03em;
    text-transform: uppercase;
    color: #ffffff;
    position: relative;
}

.fancy-button:before {
    content: '';
    display: inline-block;
    height: 40px;
    position: absolute;
    bottom: -5px;
    left: 30px;
    right: 30px;
    z-index: -1;
    border-radius: 30em;
    -webkit-filter: blur(20px) brightness(0.95);
    filter: blur(20px) brightness(0.95);
    -webkit-transform-style: preserve-3d;
    transform-style: preserve-3d;
    -webkit-transition: all 0.3s ease-out;
    transition: all 0.3s ease-out;
}

.fancy-button i {
    margin-top: -1px;
    margin-right: 20px;
    font-size: 1.265em;
    vertical-align: middle;
}

.fancy-button span {
    display: inline-block;
    padding: 10px 80px;
    border-radius: 50em;
    position: relative;
    z-index: 2;
    will-change: transform, filter;
    -webkit-transform-style: preserve-3d;
    transform-style: preserve-3d;
    -webkit-transition: all 0.3s ease-out;
    transition: all 0.3s ease-out;
}

.fancy-button:focus, .fancy-button:active {
    color: #ffffff;
}

.fancy-button:hover {
    color: #ffffff;
}

.fancy-button:hover span {
    -webkit-filter: brightness(1.05) contrast(1.05);
    filter: brightness(1.05) contrast(1.05);
    -webkit-transform: scale(0.95);
    transform: scale(0.95);
}

.fancy-button:hover:before {
    bottom: 0;
    -webkit-filter: blur(10px) brightness(0.95);
    filter: blur(10px) brightness(0.95);
}

.fancy-button.pop-onhover:before {
    opacity: 0;
    bottom: 10px;
}

.fancy-button.pop-onhover:hover:before {
    bottom: -7px;
    opacity: 1;
    -webkit-filter: blur(20px);
    filter: blur(20px);
}

.fancy-button.pop-onhover:hover span {
    -webkit-transform: scale(1.04);
    transform: scale(1.04);
}

.fancy-button.pop-onhover:hover:active span {
    -webkit-filter: brightness(1) contrast(1);
    filter: brightness(1) contrast(1);
    -webkit-transform: scale(1);
    transform: scale(1);
    -webkit-transition: all 0.15s ease-out;
    transition: all 0.15s ease-out;
}

.fancy-button.pop-onhover:hover:active:before {
    bottom: 0;
    -webkit-filter: blur(10px) brightness(0.95);
    filter: blur(10px) brightness(0.95);
    -webkit-transition: all 0.2s ease-out;
    transition: all 0.2s ease-out;
}