body {
    padding: 30px;
    box-sizing: border-box;
    font-family: Arial, serif;
    color: #2e2e2e;
}
section {
    text-align: center;
    font-size: 27px;
    margin-top: 200px;
}
ol {
    text-align: left;
}
ul {
    list-style-type: circle;
}

.padding {
    padding-right: 250px;
    padding-left: 250px;
}
.h1 {
    font-size: 50px;
}

.header {
    text-align: center;
    display: flex;
    justify-content: center;
}
.header h1 {
    font-size: 60px;
}
.header span {
    font-size: 40px;
}
.logo {
    width: 300px;
    height: 300px;
    display: block;
    margin-left: auto;
    margin-right: auto;
}

.intro {

}

.abstract {}

.abstract span {
    display: block;
    margin-bottom: 30px;
}

.button {
    margin: 150px auto 300px;
    padding: 15px;
    width: 270px;
    height: 75px;
    font-size: 30px;
    background-color: #0a84ff;
    text-align: center;
    text-decoration: none;
    color: #FFF;
    border-radius: 25px;
}

.bold {
    font-weight: bolder;
}