* {
    margin: 0;
    padding: 0;
    text-decoration: none; 
}

.nav {
    width: 100%;
    height: 84px;
    background: #FFFFFF;
}

nav {
    position: relative;
    width: 1200px;
    height: 84px;
    background: #FFFFFF;
    margin: 0 auto;
    opacity: 0.9;
    box-shadow: 0px 8px 7px 0px rgba(0, 0, 0, 0.04);
}

nav img {
    position: absolute;
    width: 150px;
    height: 90px;
    left: -4%;
    top: -10px;
}

nav a {
    color: #555555;
    text-decoration: none;
}

nav .active {
    border-bottom: 2px solid #E47731;
    font-weight: bold;
}

nav>ul>li:hover>a {
    color: #E47731;
    font-weight: bold;
}

nav>ul>li:hover {
    border-bottom: 2px solid #E47731;
}

nav .active a {
    color: #E47731;
}

nav li {
    width: 100px;
    height: 40px;
    line-height: 40px;
    background: #FFFFFF;
    list-style: none;
    text-align: center;
    font-size: 20px;
    position: relative;
}

nav>ul {
    width: 1000px;
    height: 40px;
    position: absolute;
    left: 15%;
    top: 22px;
}

nav>ul>li {
    float: left;
    margin-right: 65px;
}

nav li ul {
    position: absolute;
    top: 60px;
    height: 0;
    overflow: hidden;
    transition: height 0.5s;
}

.banner {
    width: 100%;
    min-width: 1200px;
}

.banner img {
    width: 100%;
}

ul li {
    list-style: none;
}

#container {
    position: relative;
    width: 100%;
    overflow: hidden;
}

#list {
    position: absolute;
    z-index: 1;
    width: 500%;
}

#list img {
    float: left;
    width: 100%;
}

#buttons {
    position: absolute;
    left: 50%;
    margin-left: -50px;
    bottom: 20px;
    z-index: 2;
    height: 10px;
}

#buttons span {
    float: left;
    margin: 0 10px;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: white;
    cursor: pointer;
}

#buttons .on {
    background: sandybrown;
}

.arrow {
    position: absolute;
    top: 50%;
    margin-top: -40px;
    z-index: 2;
    display: none;
    width: 50px;
    height: 82px;
    cursor: pointer;
    background: black;
    color: white;
    opacity: 0.5;
    font-size: 50px;
    font-weight: bold;
    border-radius: 5px;
    line-height: 82px;
    text-align: center;
}

#container:hover .arrow {
    display: block;
}

#prev {
    left: 20px;
}

#next {
    right: 20px;
}

footer {
    width: 100%;
    height: 359px;
    background: #222523;
}

.footer a {
    color: #FFFFFF;
    text-decoration: none;
}

.footer {
    width: 1200px;
    height: 359px;
    background: #222523;
    position: relative;
    margin: 0 auto;
}

.footer div:nth-child(1) {
    width: 64px;
    height: 88px;
    font-size: 16px;
    font-weight: 400;
    line-height: 36px;
    display: flex;
    justify-content: space-between;
    flex-flow: column;
    position: absolute;
    top: 20%;
    left: 15%;
}

.footer div:nth-child(2) {
    width: 64px;
    height: 88px;
    font-size: 16px;
    font-weight: 400;
    line-height: 36px;
    display: flex;
    justify-content: space-between;
    flex-flow: column;
    position: absolute;
    top: 20%;
    left: 30%;
}

.footer div:nth-child(3) {
    width: 1px;
    height: 120px;
    background: #FFFFFF;
    opacity: 0.1;
    position: absolute;
    top: 20%;
    left: 40%;
}

.footer div:nth-child(4) {
    width: 130px;
    height: 130px;
    background: #FFFFFF;
    position: absolute;
    display: flex;
    justify-content: space-between;
    flex-flow: column;
    top: 20%;
    left: 45%;
}

.footer div:nth-child(4) span {
    align-self: center;
}
.footer div:nth-child(4) img {
    width: 100%;
    align-self: center;
}

.footer div:nth-child(5) {
    width: 1px;
    height: 120px;
    background: #FFFFFF;
    opacity: 0.1;
    position: absolute;
    top: 20%;
    left: 60%;
}

.footer div:nth-child(6) {
    width: 218px;
    height: 100px;
    font-size: 16px;
    font-weight: 400;
    color: #FFFFFF;
    line-height: 36px;
    position: absolute;
    top: 20%;
    left: 67%;
    display: flex;
    justify-content: space-around;
    flex-flow: column;
}

.footer div:nth-child(7) {
    width: 100%;
    height: 1px;
    background: #FFFFFF;
    opacity: 0.1;
    position: absolute;
    top: 65%;
    left: 0%;
}

.footer div:nth-child(8) {
    width: 883px;
    height: 14px;
    font-size: 14px;
    font-weight: 400;
    color: #999999;
    line-height: 36px;
    position: absolute;
    top: 80%;
    left: 21%;
}