body {
    margin: 0;
    overflow: hidden;
    background: linear-gradient(to bottom, #19778c, #095f88);
    background-size: 1400% 300%;
    animation: dynamics 6s ease infinite;
    -webkit-animation: dynamics 6s ease infinite;
    -moz-animation: dynamics 6s ease infinite;
    font-size: 14px;
    min-height: 700px;
}
/*登录样式*/
.main {
    position: fixed;
    text-align: center;
    top: 100px;
    width: 100%;
    height: auto;
    display: flex;
    justify-content: center;
}

.login {
    width: 370px;
    height: 370px;
    animation: dynamics 6s ease infinite;
    -webkit-animation: dynamics 6s ease infinite;
    -moz-animation: dynamics 6s ease infinite;
    opacity: 0.9;
    background-size: 1400% 300%;
    border-radius: 10px;
    box-shadow: 0px 0px 20px 3px #0ff;
}

@keyframes dynamics {
    0% {
        background-position: 0% 0%;
    }

    50% {
        background-position: 50% 100%;
    }

    100% {
        background-position: 100% 0%;
    }
}

.log-con {
    background-repeat: no-repeat;
    background-size: 3px 20px, 20px 3px;
    height: 100%;
    margin: -2px;
    padding: 3px 1px 1px 0;
    border-radius: 3px;
}

    .log-con > span {
        font-size: 30px;
        font-weight: bold;
        letter-spacing: 2px;
        display: block;
        color: white;
        margin: 20px 0 44px 0;
    }

        .log-con > span::after {
            display: block;
            content: '';
            width: 57px;
            height: 3px;
            background: #ffffff;
            margin-top: 16px;
            justify-content: center;
            position: relative;
            left: 160px;
        }

    .log-con > input {
        display: block;
        margin: 10px 0 32px 70px;
        width: 330px;
        height: 42px;
        background-color: #ffffff;
        border-radius: 4px;
        opacity: 0.9;
        border: 0;
        font-size: 16px;
        outline: none;
        padding-left: 10px;
        color: #000000;
    }

    .log-con > a {
        width: 340px;
        height: 44px;
        background-color: #0090ff;
        border-radius: 4px;
        display: block;
        margin: 10px 0 0 70px;
        text-align: center;
        line-height: 44px;
        cursor: pointer;
        opacity: 1;
    }

input::-webkit-input-placeholder {
    color: #000000;
    font-size: 16px;
}
/*logo*/
.logo {
    width: 168px;
    height: 75px;
    position: fixed;
    left: 150px;
    top: 26px;
}

    .logo > img {
        max-width: 100%;
        max-height: 100%;
    }
/*版权样式*/
.copyright {
    position: fixed;
    bottom: 10px;
    font-size: 16px;
    display: block;
    width: 100%;
    text-align: center;
    color: white;
}