* {
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
}
.header {
    height: 200px;
    background: #eee;
}
.container {
    display: flex;
    width: 1000px;
    max-width: 100%;
    margin: 60px auto;
    position: relative;
}
.sidebar {
    width: 35%;
}
.sidebar-inner {
    padding: 24px;
    background: #fff;
    border: 1px solid #e4e4e4;
}
.content {
    width: 65%;
    margin-left: 40px;
}
.footer {
    height: 900px;
    background: #eee;
}