* {
    padding: 0;
    margin: 0;
}

li {
    list-style: none;
}

footer {
    width: 100%;
    height: 500px;
    background: #2E2E2E;
    padding: 0 56px;
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
}

footer .footer-con {
    width: 75%;
    height: 80%;
    margin: auto;
    padding-top: 77px;
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
    display: flex;
    display: -webkit-flex;
    display: -moz-flex;
    display: -ms-flexbox;
}

footer .footer-con div {
    width: 30%;
}

footer .footer-con div h5 {
    font-size: 22px;
    color: #FEFEFE;
    margin-bottom: 26px;
}

footer .footer-con div p {
    color: #ACAAAA;
    font-size: 16px;
}

footer .footer-con div p i {
    width: 20px;
}

footer .footer-con div input {
    width: 80%;
    height: 34px;
    margin-bottom: 20px;
    text-indent: 10px;
    border-radius: 4px;
    font-size: 14px;
}

footer .footer-con div textarea {
    width: 80%;
    height: 76px;
    text-indent: 10px;
    resize: none;
    font-size: 14px;
}

footer .footer-con div button {
    display: block;
    background: #2B8FCF;
    color: #fff;
    width: 54px;
    height: 34px;
    border: none;
    border-radius: 4px;
    margin-top: 10px;
    font-size: 14px;
}

footer .footer-con div:nth-of-type(2) {
    margin: 0 65px;
}

footer .footer-text {
    width: 100%;
    height: 100px;
    border-top: 5px solid #383737;
    text-align: center;
    padding: 20px 200px 20px;
    color: #fff;
    font-size: 16px;
}

footer .footer-text p {
    width: 60%;
    text-align: center;
    font-size: 16px;
    display: inline-block;
    margin: auto;
}

footer .footer-text a {
    float: right;
}

/* 规范后的版权与备案号排版 */
footer .footer-text .copyright {
    width: 100%;
    margin: 0;
}

footer .footer-text .beian {
    width: 100%;
    margin: 6px 0 0;
}

footer .footer-text .beian a {
    float: none;
    color: #ACAAAA;
    font-size: 14px;
    text-decoration: none;
}

footer .footer-text .beian a:hover {
    color: #fff;
    text-decoration: underline;
}

/* 返回顶部悬浮按钮 */
.back-to-top {
    position: fixed;
    right: 32px;
    bottom: 40px;
    width: 44px;
    height: 44px;
    line-height: 44px;
    text-align: center;
    background: #2B8FCF;
    color: #fff;
    border-radius: 50%;
    box-shadow: 0 4px 12px rgba(0, 0, 0, .18);
    opacity: 0;
    visibility: hidden;
    transform: translateY(12px);
    transition: opacity .3s ease, transform .3s ease, visibility .3s ease, background .3s ease;
    z-index: 9999;
    font-size: 18px;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: #1f6fa3;
    text-decoration: none;
    color: #fff;
}