body {
    font-family: sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background: #f9f9f9;
}
header, footer {
    background: #004466;
    color: white;
    text-align: center;
    padding: 1rem;
}
section {
    padding: 2rem;
    max-width: 800px;
    margin: auto;
    background: white;
    margin-top: 1rem;
    border-radius: 8px;
}
h1, h2 {
    color: #004466;
}
ul {
    padding-left: 1.2rem;
}
form {
    display: flex;
    flex-direction: column;
}
input, textarea {
    margin-bottom: 1rem;
    padding: 0.8rem;
    font-size: 1rem;
}
button {
    padding: 0.8rem;
    font-size: 1rem;
    background: #004466;
    color: white;
    border: none;
    cursor: pointer;
}


/* Responsive layout cho mobile */
@media (max-width: 768px) {
    header, footer {
        padding: 1rem 0.5rem;
    }
    section {
        padding: 1rem;
        margin: 1rem;
    }
    h1 {
        font-size: 1.5rem;
    }
    h2 {
        font-size: 1.2rem;
    }
    img {
        max-width: 100%;
        height: auto;
    }
    form input, form textarea, form button {
        width: 100%;
        box-sizing: border-box;
    }
}
/* === Header Navigation === */
.nav-link {
  color: #fff;
  text-decoration: none;
  font-weight: 500;
}

.nav-link:hover {
  text-decoration: underline;
}

/* Responsive menu */
@media (max-width: 768px) {
  #main-nav ul {
    flex-direction: column;
    gap: 10px;
    margin-top: 10px;
  }

  #main-nav {
    display: none;
    width: 100%;
  }

  #main-nav.show {
    display: block;
  }

  #menu-toggle {
    display: block;
    margin-bottom: 10px;
  }
}
/* Footer link style */
.footer-link {
    color: #dddddd;
    text-decoration: none;
    font-weight: 400;
}

.footer-link:hover {
    text-decoration: underline;
    color: #ffffff;
}


/* --- VTC landing enhancements (B2B lead) --- */
.hero{
  background: #ffffff;
  padding: 2.5rem 2rem 1.5rem;
  text-align:center;
  border-bottom: 1px solid #e8e8e8;
}
.hero h1{
  margin: 0 0 .75rem;
  font-size: 2rem;
  line-height: 1.2;
  color:#003f5c;
}
.hero p{
  margin: 0 0 1.25rem;
  color:#333;
}
.hero-cta{
  display:flex;
  gap:.75rem;
  justify-content:center;
  flex-wrap:wrap;
}
.btn{
  display:inline-block;
  padding:.75rem 1rem;
  border-radius:8px;
  border:1px solid #003f5c;
  text-decoration:none;
  color:#003f5c;
  background:#fff;
  font-weight:600;
}
.btn.primary{
  background:#003f5c;
  color:#fff;
}
.company-info{
  margin: 0;
  padding-left: 1.2rem;
}
.company-info li{
  margin-bottom: .35rem;
}
.service-grid{
  display:grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}
.card{
  background:#fff;
  border:1px solid #e8e8e8;
  border-radius:12px;
  padding:1rem;
}
.card h3{
  margin-top:0;
  color:#003f5c;
}
.contact-inline{
  margin-top: 1rem;
}
.footer-inner{
  max-width: 1100px;
  margin: 0 auto;
}
.footer-company{ margin: .5rem 0; }
.footer-copy{ margin-top: .75rem; opacity: .9; }

.floating-cta{
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  display: none;
  gap: .5rem;
  padding: .6rem .75rem;
  background: rgba(249,249,249,.96);
  border-top: 1px solid #e8e8e8;
  justify-content: center;
  z-index: 9999;
}
.floating-cta .cta-btn{
  display:inline-block;
  padding:.75rem 1rem;
  border-radius:999px;
  text-decoration:none;
  font-weight:700;
  border:1px solid #003f5c;
  color:#003f5c;
  background:#fff;
}
.floating-cta .cta-btn:first-child{
  background:#003f5c;
  color:#fff;
}
.legal-intro{
  background:#fff;
  border:1px solid #e8e8e8;
  border-radius:12px;
  margin: 1.5rem 2rem 0;
  padding: 1rem;
}
@media (max-width: 820px){
  .service-grid{ grid-template-columns: 1fr; }
  .hero{ padding: 2rem 1.25rem 1.25rem; }
  section{ padding: 1.5rem 1.25rem; }
  .floating-cta{ display:flex; }
  /* leave space so CTA bar doesn't cover content */
  body{ padding-bottom: 74px; }
}