*{
    margin:0;
    padding: 0;
    box-sizing: border-box;
}

a {
    color:#fff;
    text-decoration:underline;
}

html {
    height:100%;
}

body {
    min-height:100%;
    padding-bottom:50px;
    position:relative;
}

header ,.hero ,#section1 ,#section2 ,#section3 ,#section4  {
    position: relative;
}

.note {
    position: absolute;
    color:#e01a4f;
    font-size:14px;
    font-family: sans-serif;
}

.note.header {
    top:15px;
    left: 100px;
    font-size:12px;
}
.note.hero {
    top:0;
    right: 50px;
}
.note.id {
    top:30px;
    left:50%;

}
.note.name {
    top:-30px;
    left:40%;
}
.note.aside {
    top:120px;
    right:10px;
    color:#f15946;
    text-align:left;
}

.note.section1 {
    top:60px;
    left:600px;
}

.note.section1-1 {
    right:50px;
    top:200px;
}

.note.h2 {
    left:300px;
    top: 60px;
}

.note.section2-1 {
    right:350px;
    top:250px;
}

.note.imgcontainer {
    right:50px;
    top:50%;
}

.note.main {
    top:140px;
    left:50%;
}

.note.footer {
    right:50px;
}

.note.header, .note.aside {
    color:#fff;
}

.note.ul {
    top:150px;
    left:450px;
}

.note.background {
    right:50px;
    top:100px;
}

nav {
    height:50px;
    line-height: 50px;
    clear:both;
    padding: 0 10px;
    color:#fff;
    background:#666;
}

nav ul {
    float:right;
    list-style:none;
}

nav li {
    display: inline;
    margin:0 10px;
}

.hero {
    min-height:300px;
    text-align: center;
    line-height: 300px;
    background: fixed url(https://placehold.co/600x400/orange/orange);
    background-size: cover;
}

h1 {
    font-size:50px;
}

h1 span {
    font-size:25px;
}

aside {
    position:absolute;
    z-index: 100;
    background: #666;
    text-align: center;
    width:400px;
    padding: 50px;
    height:300px;
    color:#fff;
}
aside ul {
    list-style: none;
}

section:is(#section1,#section2,#section3,#section4) {
    min-height:400px;
}

section:is(#section2,#section3,#section4) ul {
    padding-left:50px;
    margin:50px 0 50px 0;
}

#section2 {
    background:fixed url(https://4icsshu.github.io/i/img3.jpg) no-repeat center center;
    background-size: cover;
}

#section1 ul {
    margin:50px 0;
}

h2 {
    padding:50px 50px;
    background: #eee;
}

#section1 h2 {
    padding-left:450px;
}

#section1 ul {
    padding-left:450px;
}

main {
    width:60%;
    padding:50px;
    margin:0 auto;
    background: #ccc;
    border-radius:10px;
    margin-top:30px;
}

section:is(.imgcontainer) {
    text-align:center;
    margin-top:50px;
}

section:is(.imgcontainer) img {
    height:300px;
    margin:0 10px;
}


footer {
    position:absolute;
    bottom:0;
    width:100%;
    background:pink;
    height:50px;
    line-height: 50px;
    text-align:center;
}