#box2 {
position: relative;
left: 25%;
/* left的百分比是相对于父容器的width */
bottom: -100px;
}
#box5 {
position: absolute;
left: 0;
}
.border{
position: relative;
}
#box5 {
position: absolute;
left: 0;
top: 100px;
}
#box5 {
position: absolute;
}
#box5 {
position: absolute;
z-index: -1;
}
#box2_4_1 {
position: absolute;
left: 0;
right: 0;
top: 0;
bottom: 150px;
background-color: #fa8c16;
}
#box4_1 {
position: sticky;
top: 50px;
bottom: 100px;
}