```css
*{
    margin:0;
    padding:0;
    box-sizing:border-box;
}

body{
    font-family:Arial,sans-serif;
    background:#f5f5f5;
    color:#222;
    line-height:1.6;
}

.topo-info{
    background:#ff6b35;
    color:white;
    padding:10px 40px;
    display:flex;
    justify-content:space-between;
    align-items:center;
    flex-wrap:wrap;
    font-size:14px;
}

.info-esquerda{
    display:flex;
    gap:25px;
    flex-wrap:wrap;
}

.info-direita{
    display:flex;
    gap:20px;
}

header{
    background:#ffffff;
    display:flex;
    justify-content:space-between;
    align-items:center;
    padding:15px 50px;
    border-bottom:3px solid #ff6b35;
    position:sticky;
    top:0;
    z-index:1000;
    box-shadow:0 2px 10px rgba(0,0,0,.08);
}

.logo{
    height:70px;
}

nav a{
    color:#222;
    text-decoration:none;
    margin-left:20px;
    font-weight:bold;
    transition:.3s;
}

nav a:hover{
    color:#ff6b35;
}

.hero{
    height:90vh;
    display:flex;
    justify-content:center;
    align-items:center;
    text-align:center;
    color:white;
    background:
        linear-gradient(rgba(0,0,0,.58),rgba(0,0,0,.58)),
        url("imagens/hero-industrial.png");
    background-size:cover;
    background-position:center;
    background-repeat:no-repeat;
}

.hero-content{
    max-width:900px;
    padding:20px;
}

.tag{
    display:inline-block;
    background:#ff6b35;
    color:#fff;
    padding:8px 18px;
    border-radius:30px;
    font-size:14px;
    font-weight:bold;
    margin-bottom:20px;
}

.hero h1{
    font-size:56px;
    color:#ffffff;
    margin-bottom:25px;
}

.hero p{
    font-size:22px;
    color:#f5f5f5;
    max-width:780px;
    margin:auto;
}

.btn{
    display:inline-block;
    margin-top:30px;
    background:#ff6b35;
    color:white;
    text-decoration:none;
    padding:15px 30px;
    border-radius:8px;
    font-weight:bold;
    transition:.3s;
}

.btn:hover{
    background:#e85a2a;
    transform:translateY(-3px);
}

section{
    padding:80px 40px;
}

h2{
    text-align:center;
    font-size:42px;
    color:#ff6b35;
    margin-bottom:40px;
}

.sobre p{
    text-align:center;
    max-width:1000px;
    margin:auto;
    font-size:18px;
}

.grid{
    display:grid;
    grid-template-columns:repeat(auto-fit,minmax(260px,1fr));
    gap:25px;
}

.card{
    background:#fff;
    padding:25px;
    border-radius:15px;
    border:1px solid #ddd;
    box-shadow:0 5px 15px rgba(0,0,0,.08);
    transition:.3s;
    font-weight:bold;
}

.card:hover{
    transform:translateY(-5px);
}

#servicos .card{
    border-left:5px solid #ff6b35;
}

#servicos .card:hover{
    background:#ff6b35;
    color:white;
}

/* CONHECIMENTO TÉCNICO */

.conhecimento{
    background:#111;
    color:white;
    text-align:center;
    padding:90px 40px;
}

.conhecimento h2{
    color:white;
    font-size:38px;
    margin:25px auto 30px;
}

.conhecimento-texto{
    max-width:700px;
    margin:25px auto 0;
    color:#ccc;
    font-size:17px;
    line-height:1.7;
    text-align:center;
}

.video-destaque{
    max-width:520px;
    margin:30px auto;
    border-radius:12px;
    overflow:hidden;
    border:none;
    box-shadow:none;
    background:transparent;
}

.video-destaque video{
    width:100%;
    display:block;
    border:none;
    outline:none;
    background:transparent;
}

/* DIFERENCIAIS COM IMAGEM */

.diferenciais{
    background:#f5f5f5;
    text-align:center;
}

.diferenciais .tag{
    margin-bottom:10px;
}

.diferenciais h2{
    color:#222;
    margin-bottom:50px;
}

.diferenciais-grid{
    display:grid;
    grid-template-columns:repeat(auto-fit,minmax(280px,1fr));
    gap:30px;
    max-width:1200px;
    margin:auto;
}

.diferencial-card{
    background:#fff;
    border-radius:18px;
    overflow:hidden;
    box-shadow:0 8px 25px rgba(0,0,0,.12);
    transition:.3s;
    text-align:center;
}

.diferencial-card:hover{
    transform:translateY(-6px);
}
.servicos-grid{
    display:grid;
    grid-template-columns:repeat(auto-fit,minmax(280px,1fr));
    gap:30px;
    max-width:1300px;
    margin:auto;
}

.servico-card{
    background:#fff;
    border-radius:18px;
    overflow:hidden;
    box-shadow:0 12px 30px rgba(0,0,0,.08);
    transition:.4s;
    cursor:pointer;
}

.servico-card:hover{
    transform:translateY(-8px);
    box-shadow:0 18px 45px rgba(0,0,0,.18);
}

.servico-card img{
    width:100%;
    height:220px;
    object-fit:cover;
    transition:.5s;
}

.servico-card:hover img{
    transform:scale(1.08);
}

.servico-card h3{
    text-align:center;
    padding:18px;
    color:#222;
    font-size:18px;
    font-weight:700;
}

.servico-card:hover h3{
    color:#ff6b35;
}
.diferencial-img{
    height:220px;
    background-size:cover;
    background-position:center;
}

.img-exaustor{
    background-image:url("imagens/manutencao-exaustor.png");
}

.img-coifa{
    background-image:url("imagens/coifa-limpeza.png");
}

.img-dutos{
    background-image:url("imagens/instalacao-dutos.png");
}

.diferencial-card h3{
    color:#222;
    font-size:20px;
    padding:25px 25px 10px;
}

.diferencial-card p{
    color:#555;
    padding:0 25px 30px;
}

/* CTA */

.cta{
    background:#111;
    color:white;
    text-align:center;
}

.cta h2{
    color:white;
}

.cta p{
    font-size:18px;
}

/* CONTATO */

.contato{
    text-align:center;
    background:#f8f8f8;
}

.contato > p{
    max-width:700px;
    margin:0 auto 40px;
    color:#555;
}

.contato-grid{
    display:grid;
    grid-template-columns:repeat(auto-fit,minmax(220px,1fr));
    gap:25px;
    max-width:1000px;
    margin:auto;
}

.contato-card{
    background:#fff;
    padding:30px;
    border-radius:12px;
    box-shadow:0 4px 15px rgba(0,0,0,.08);
    transition:.3s;
}

.contato-card:hover{
    transform:translateY(-5px);
}

.contato-card h3{
    color:#ff6b35;
    margin-bottom:10px;
}

/* RODAPÉ */

.footer{
    background:#111;
    color:#fff;
    padding-top:60px;
}

.footer-container{
    max-width:1200px;
    margin:auto;
    display:grid;
    grid-template-columns:repeat(auto-fit,minmax(250px,1fr));
    gap:40px;
    padding:0 30px 40px;
}

.footer-col h3{
    color:#ff6b35;
    margin-bottom:15px;
}

.footer-col p{
    color:#ccc;
    line-height:1.8;
}

.footer-bottom{
    border-top:1px solid rgba(255,255,255,.1);
    text-align:center;
    padding:20px;
    color:#999;
}

/* WHATSAPP */

.whatsapp{
    position:fixed;
    bottom:20px;
    right:20px;
    width:65px;
    height:65px;
    background:#25D366;
    color:white;
    border-radius:50%;
    display:flex;
    align-items:center;
    justify-content:center;
    text-decoration:none;
    font-size:30px;
    box-shadow:0 5px 15px rgba(0,0,0,.3);
    z-index:2000;
}

/* RESPONSIVO */

@media(max-width:768px){
    header{
        flex-direction:column;
        gap:15px;
        padding:15px 20px;
    }

    nav{
        text-align:center;
    }

    nav a{
        display:inline-block;
        margin:8px 10px;
        font-size:14px;
    }

    .hero h1{
        font-size:34px;
    }

    .hero p{
        font-size:17px;
    }

    section{
        padding:60px 20px;
    }

    h2{
        font-size:30px;
    }

    .topo-info{
        justify-content:center;
        text-align:center;
        gap:10px;
    }

    .conhecimento h2{
        font-size:30px;
    }

    .video-destaque{
        max-width:100%;
    }

    .footer-container{
        text-align:center;
    }
}
```