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

header {
    width: 100vw;
    height: 50px;
    display: flex;
    justify-content: space-around;
    align-items: center;
    position: fixed;
    top: 0;
    color: #F8F7F9;
    background-color: #8e7471;
}
header a {
   color: #F8F7F9;
}
section.top {
    background-image: url("a.png");
    background-repeat: no-repeat;
    background-size: contain;
    background-position: center center;
    padding-top: 10%;
}
.btn {
    width: 10rem;
    height: 3rem;
    background-color: rgb(44, 44, 44);
    display: block;
    padding: 0.2rem;
    margin: 0.2rem;
    border-radius: 0.5rem;
    color: white;
    text-align: center;
    line-height: calc(3rem - 0.2rem - 0.2rem);
    text-decoration: none;
}
main {
    margin-top: 50px;
}
section:nth-child(2n){
    background-color: #f9f9f9;
}
section {
    display: flex;
    flex-direction: column;
    justify-content: space-around;
    align-items: center;
    width: 100vw;
    min-height: 800px;
}
.two_co {
    display: flex;
    align-items: center;
    justify-content: space-around;
}
h1 span {
    font-weight: normal;
    font-size: 1rem;
    display: block;
    margin-bottom: -5px;
}
h1 {
    font-size: 3rem;
}
.sec_title {
    font-size: 1.5rem;
    font-weight: bold;
}

@media screen and (max-width:1000px) {
    section {
        min-height: 300px;
    }
    h1 {
        font-size: large;
    }
    p {
        margin: 0 30px;
    }
}