body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f5f5f5;
}

header {
    background-color: #333;
    color: #fff;
    padding: 1em 0;
}

nav ul {
    list-style-type: none;
    padding: 0;
}

nav ul li {
    display: inline;
    margin: 0 10px;
}

nav ul li a {
    color: #fff;
    text-decoration: none;
}

main {
    padding: 20px;
    background-color: #fff;
}

section#hero {
    background: url('https://png.pngtree.com/background/20210711/original/pngtree-blue-business-technology-information-security-banner-background-picture-image_1100472.jpg') no-repeat center center;
    background-size: cover;
    color: #fff;
    text-align: center;
    padding: 100px 20px;
}

section#hero h1 {
    font-size: 2.5em;
    margin-bottom: 20px;
}

section#hero p {
    font-size: 1.2em;
    margin-bottom: 30px;
}

section#hero a.button {
    background-color: #007BFF;
    color: #fff;
    padding: 15px 25px;
    text-decoration: none;
    border-radius: 5px;
    font-size: 1.1em;
}

section#hero a.button:hover {
    background-color: #0056b3;
}

section#features {
    max-width: 1000px;
    margin: 40px auto;
    text-align: center;
}

section#features h2 {
    font-size: 2em;
    margin-bottom: 20px;
}

section#features .feature {
    display: inline-block;
    width: 30%;
    margin: 20px 1.5%;
    padding: 20px;
    background-color: #fafafa;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    vertical-align: top;
}

section#features .feature img {
    width: 100%;
    height: auto;
    border-radius: 4px;
    margin-bottom: 15px;
}

section#features .feature h3 {
    font-size: 1.5em;
    margin-bottom: 10px;
}

section#features .feature p {
    font-size: 1em;
    line-height: 1.6;
}

footer {
    background-color: #333;
    color: #fff;
    text-align: center;
    padding: 10px 0;
}