style.css

html,body {
    font-family: 'Open Sans', sans-serif;
}

a:hover{
text-decoration: none;
}
#about {
background: url("https://img.freepik.com/free-vector/gradient-background-green-tones_23-2148374530.jpg") center top no-repeat fixed;
background-size: cover;
padding: 29px 0 40px 0;
position: relative;
}

.section-header h3 {
font-size: 32px;
color: #111;
text-transform: uppercase;
text-align: center;
font-weight: 700;
position: relative;
padding-bottom: 15px;
}

.section-header h3::before {
content: '';
position: absolute;
display: block;
width: 120px;
height: 1px;
background: #ddd;
bottom: 1px;
left: calc(50% - 60px);
}

.section-header h3::after {
content: '';
position: absolute;
display: block;
width: 40px;
height: 3px;
background: #18d26e;
bottom: 0;
left: calc(50% - 20px);
}

.section-header p {
text-align: center;
padding-bottom: 30px;
color: #333;
}

#about::before {
content: '';
position: absolute;
left: 0;
right: 0;
top: 0;
bottom: 0;

z-index: 9;
}

#about .container {
position: relative;
z-index: 10;
}

#about .about-col {
background: #fff;
border-radius: 15px;
box-shadow: 0px 2px 12px rgba(0, 0, 0, 0.08);
margin-bottom: 20px;
}

#about .about-col .img {
position: relative;
}

#about .about-col .img img {
border-radius: 15px;
}

#about .about-col .icon {
width: 64px;
height: 64px;
padding-top: 8px;
text-align: center;
position: absolute;
background-color: #18d26e;
border-radius: 50%;
text-align: center;
border: 4px solid #fff;
left: calc( 50% - 32px);
bottom: -30px;
transition: 0.3s;
}

#about .about-col i {
font-size: 24px;
line-height: 1.5;
color: #fff;
transition: 0.3s;
}

#about .about-col:hover .icon {
background-color: #fff;
}

#about .about-col:hover i {
color: #18d26e;
}

#about .about-col h2 {
color: #000;
text-align: center;
font-weight: 700;
font-size: 20px;
padding: 0;
margin: 40px 0 12px 0;
}

#about .about-col h2 a {
color: #000;
}

#about .about-col h2 a:hover {
color: #18d26e;
}

#about .about-col p {
font-size: 14px;
line-height: 24px;
color: #333;
margin-bottom: 0;
padding: 0 20px 20px 20px;
}
.btn-sm-default-web {
background: #0c2b4b;
display: inline-block;
text-transform: uppercase;
padding: 5px 30px;
color: #ffffff;
letter-spacing: 1px;
}