.about {
    padding: 20px 10% 100px 10%;
    background: #000;
    color: #fff;
    text-align: center;
    background-image: url('../image/aboutus_bg.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}
.about h2 {
    font-size: 42px;
    font-weight: 700;
}
.about p {
    max-width: 900px;
    margin: 15px auto;
    font-size: 18px;
    opacity: 0.9;
}