.mian_bottom {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.mian_bottom h1 {
    font-size: 3rem;
    color: red;
}

.project__list {
    width: 100%;
}

.project__list ul {
    margin-left: 10px;
    margin-top: 20px;
}

.project__list ul li {
    font-size: 2rem;
}

main {
    min-height: calc(100vh - 38px - 88px);
}