```css
*{
    margin:0;
    padding:0;
    box-sizing:border-box;
    font-family:'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body{
    background:#0d0d0d;
    color:white;
    line-height:1.8;
}

/* HERO */

.hero{
    text-align:center;
    padding:100px 20px;
    border-bottom:1px solid rgba(255,165,0,0.15);
}

.hero h1{
    color:orange;
    font-size:3.5rem;
    margin-bottom:15px;
}

.hero p{
    color:#d1d1d1;
    font-size:1.2rem;
}

/* CONTAINER */

.container{
    width:90%;
    max-width:1200px;
    margin:auto;
    padding:60px 0;
}

/* SERVICE CARDS */

.service-card{
    background:#171717;
    padding:35px;
    margin-bottom:25px;
    border-radius:15px;
    border-left:5px solid orange;
    transition:0.3s ease;
    box-shadow:0 8px 20px rgba(0,0,0,0.3);
}

.service-card:hover{
    transform:translateY(-6px);
}

.icon{
    font-size:40px;
    margin-bottom:15px;
}

.service-card h2{
    color:orange;
    margin-bottom:15px;
}

.service-card p{
    color:#d6d6d6;
    margin-bottom:12px;
}

/* CTA */

.cta-box{
    text-align:center;
    margin-top:50px;
    padding:50px 30px;
    background:#151515;
    border-radius:15px;
    border:1px solid rgba(255,165,0,0.2);
}

.cta-box h2{
    color:orange;
    margin-bottom:15px;
}

.cta-box p{
    max-width:700px;
    margin:auto;
    color:#d6d6d6;
}

.contact-btn{
    display:inline-block;
    margin-top:25px;
    padding:14px 35px;
    background:orange;
    color:black;
    text-decoration:none;
    font-weight:bold;
    border-radius:8px;
    transition:.3s;
}

.contact-btn:hover{
    background:white;
}

/* BACK BUTTON */

.back-btn{
    display:block;
    width:220px;
    text-align:center;
    margin:40px auto 0;
    padding:14px 25px;
    background:transparent;
    border:2px solid orange;
    color:orange;
    text-decoration:none;
    font-weight:bold;
    border-radius:8px;
    transition:.3s;
}

.back-btn:hover{
    background:orange;
    color:black;
}

/* MOBILE */

@media(max-width:768px){

    .hero h1{
        font-size:2.5rem;
    }

    .service-card{
        padding:25px;
    }
}
```