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

body{
font-family:Arial, Helvetica, sans-serif;
background:#ffffff;
color:#333;
line-height:1.6;
overflow-x:hidden;
}

img{
max-width:100%;
height:auto;
display:block;
}

.container{
width:90%;
max-width:1400px;
margin:auto;
}

/* HEADER */

header{
background:#ffffff;
box-shadow:0 2px 15px rgba(0,0,0,.08);
position:sticky;
top:0;
z-index:999;
}

.navbar{
display:flex;
justify-content:space-between;
align-items:center;
padding:15px 0;
gap:20px;
}

.logo img{
height:120px;
width:auto;
}

nav ul{
display:flex;
list-style:none;
gap:25px;
flex-wrap:wrap;
}

nav ul li a{
text-decoration:none;
font-weight:700;
color:#003c8f;
transition:.3s;
}

nav ul li a:hover{
color:#ff7a00;
}

.phone{
background:#ff7a00;
padding:12px 24px;
border-radius:40px;
text-decoration:none;
color:white;
font-weight:bold;
white-space:nowrap;
}

/* HERO */

.hero{
width:100%;
margin:0;
padding:0;
}

.hero img{
width:100%;
height:auto;
display:block;
}

/* BUTTONS */

.btn{
display:inline-block;
padding:15px 30px;
background:#ff7a00;
color:#fff;
text-decoration:none;
border-radius:8px;
font-weight:bold;
transition:.3s;
}

.btn:hover{
background:#e56700;
}

/* CARDS */

.card{
background:#fff;
padding:30px;
border-radius:20px;
box-shadow:0 5px 20px rgba(0,0,0,.08);
}

.card h3{
margin-bottom:15px;
color:#003c8f;
}

/* FOOTER */

footer{
background:#003c8f;
color:#fff;
text-align:center;
padding:50px 20px;
}

footer h2{
margin-bottom:15px;
}

footer p{
margin:8px 0;
}

footer a{
color:#fff;
text-decoration:none;
}

/* MOBILE */

@media(max-width:992px){

.navbar{
flex-direction:column;
text-align:center;
}

nav ul{
justify-content:center;
}

.logo img{
height:90px;
}

.phone{
margin-top:10px;
}

}

@media(max-width:768px){

.logo img{
height:80px;
}

nav ul{
gap:12px;
justify-content:center;
}

nav ul li a{
font-size:14px;
}

.phone{
padding:10px 18px;
font-size:14px;
}

}

@media(max-width:480px){

nav ul{
display:flex;
flex-wrap:wrap;
justify-content:center;
gap:10px;
}

nav ul li a{
font-size:13px;
}

.logo img{
height:70px;
}

.phone{
font-size:13px;
padding:8px 15px;
}

}
```