#header-20 {
  position: sticky;
  top: 0;
  z-index: 1030;
  background-color: #343a40;
  color: #f8f9fa;
  padding: 0.6rem 0;
}
#header-20 .navbar-brand img {
  max-height: 38px;
  filter: brightness(0) invert(1);
}
#header-20 .navbar-brand .site-name-text {
  font-size: 1.5rem;
  font-weight: 500;
  color: #fff;
}
#header-20 .navbar-nav .nav-item {
  margin: 0 0.2rem;
}
#header-20 .navbar-nav .nav-link {
  font-weight: 400;
  font-size: 0.9rem;
  color: #adb5bd;
  padding: 0.4rem 0.7rem;
  border-radius: 3px;
  transition: color 0.2s ease, background-color 0.2s ease;
}
#header-20 .navbar-nav .nav-link:hover,
#header-20 .navbar-nav .nav-link.active {
  color: #fff;
  background-color: rgba(255, 255, 255, 0.1);
}
#header-20 .header-contact-utility {
  display: flex;
  align-items: center;
  margin-left: auto;
}
#header-20 .quick-contact-info {
  font-size: 0.85rem;
  color: #ced4da;
  margin-right: 1.5rem;
  display: flex;
  align-items: center;
}
#header-20 .quick-contact-info a {
  color: #e9ecef;
  text-decoration: none;
  transition: color 0.2s ease;
}
#header-20 .quick-contact-info a:hover {
  color: #fff;
  text-decoration: underline;
}
#header-20 .quick-contact-info .contact-divider {
  margin: 0 0.75rem;
  color: #6c757d;
}
#header-20 .quick-contact-info i {
  margin-right: 0.3rem;
  font-size: 0.9em;
}
#header-20 .utility-actions .btn-utility {
  font-size: 0.85rem;
  font-weight: 500;
  color: #fff;
  background-color: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.2);
  padding: 0.4rem 0.8rem;
  margin-left: 0.5rem;
  border-radius: 4px;
  transition: background-color 0.2s ease, border-color 0.2s ease;
  white-space: nowrap;
}
#header-20 .utility-actions .btn-utility:hover {
  background-color: rgba(255, 255, 255, 0.25);
  border-color: rgba(255, 255, 255, 0.3);
}
#header-20 .utility-actions .btn-utility i {
  margin-right: 0.4rem;
}
#header-20 .navbar-toggler {
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: #fff;
}
#header-20 .navbar-toggler-icon {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(255,255,255,0.8)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}
#header-20 .navbar-toggler:focus {
  box-shadow: 0 0 0 0.2rem rgba(255, 255, 255, 0.25);
}
@media (max-width: 1199.98px) {
  #header-20 .quick-contact-info {
    display: none;
  }
}
@media (max-width: 991.98px) {
  #header-20 .navbar-collapse {
    margin-top: 0.6rem;
    background-color: #495057;
    padding: 0.5rem 0;
    border-radius: 0 0 4px 4px;
  }
  #header-20 .navbar-nav {
    margin-bottom: 0.5rem;
  }
  #header-20 .navbar-nav .nav-item {
    width: 100%;
    margin: 0;
  }
  #header-20 .navbar-nav .nav-link {
    padding: 0.7rem 1rem;
    border-bottom: 1px solid #5a6268;
  }
  #header-20 .navbar-nav .nav-item:last-child .nav-link {
    border-bottom: none;
  }
  #header-20 .header-contact-utility {
    flex-direction: column;
    align-items: stretch;
    width: 100%;
    margin-left: 0;
    padding: 0.5rem 1rem;
  }
  #header-20 .quick-contact-info {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    margin-right: 0;
    margin-bottom: 0.75rem;
    width: 100%;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid #5a6268;
  }
  #header-20 .quick-contact-info .contact-divider {
    display: none;
  }
  #header-20 .quick-contact-info a {
    margin-bottom: 0.3rem;
  }
  #header-20 .utility-actions {
    display: flex;
    flex-direction: column;
    align-items: stretch;
  }
  #header-20 .utility-actions .btn-utility {
    width: 100%;
    margin-left: 0;
    margin-bottom: 0.5rem;
    text-align: center;
  }
  #header-20 .utility-actions .btn-utility:last-child {
    margin-bottom: 0;
  }
}



#link-section-9 {
  position: relative;
  background: var(--bottom-color);
  color: var(--text-color);
  text-align: center;
  overflow: hidden;
  padding: 6rem 0;
}

/* Lớp nền trên */
#link-section-9 .upper-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 50%;
  background: var(--top-color);
  z-index: 0;
}

/* Sóng chia giữa */
#link-section-9 .upper-bg .wave-bottom {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 80px;
  overflow: hidden;
}
#link-section-9 .upper-bg .wave-bottom svg {
  display: block;
  width: calc(100% + 1px);
  height: 80px;
}
#link-section-9 .upper-bg .wave-bottom path {
  fill: var(--bottom-color);
}

/* Nội dung giữ nổi trên lớp nền */
#link-section-9 .container {
  position: relative;
  z-index: 1;
}

#link-section-9 .section-title {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

#link-section-9 .section-subtitle {
  font-size: 1.125rem;
  margin-bottom: 2rem;
  opacity: 0.9;
}

/* Các nút liên kết */
#link-section-9 .link-item {
  background: rgba(255,255,255,0.2);
  border-radius: 0.75rem;
  padding: 1.5rem;
  text-decoration: none;
  color: var(--text-color);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.3s, transform 0.3s;
}
#link-section-9 .link-item:hover {
  background: rgba(255,255,255,0.35);
  transform: translateY(-4px);
}
#link-section-9 .link-item i {
  font-size: 1.25rem;
  margin-right: 0.5rem;
}





/* Footer-6 Styles */
#footer-6 .footer-section-1 {
  background-color: var(--footer-s1-bg-color, #2c3e50);
  color: var(--footer-s1-text-color, #ecf0f1);
  padding: 2.5rem 0;
}
#footer-6 .footer-section-1 .footer-logo-s1 {
  max-height: 50px;
  margin-bottom: 1rem;
  filter: brightness(0) invert(1); /* Assuming dark bg, light logo */
}
#footer-6 .footer-section-1 .company-bio-s1 {
  font-size: 0.9rem;
  line-height: 1.6;
  opacity: 0.9;
  margin-bottom: 1.5rem;
}
#footer-6 .footer-section-1 .newsletter-title-s1 {
  font-size: 1.1rem;
  font-weight: 500;
  margin-bottom: 0.75rem;
}
#footer-6 .footer-section-1 .newsletter-form-s1 .form-control {
  background-color: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
  color: var(--footer-s1-text-color, #ecf0f1);
  font-size: 0.9rem;
}
#footer-6 .footer-section-1 .newsletter-form-s1 .form-control::placeholder {
  color: rgba(255, 255, 255, 0.5);
}
#footer-6 .footer-section-1 .newsletter-form-s1 .btn-newsletter {
  background-color: var(--footer-newsletter-btn-bg, #3498db);
  color: var(--footer-newsletter-btn-text, #ffffff);
  border-color: var(--footer-newsletter-btn-bg, #3498db);
  font-size: 0.9rem;
}
#footer-6 .footer-section-1 .newsletter-response-s1 {
  font-size: 0.85rem;
  margin-top: 0.5rem;
}
#footer-6 .footer-section-1 .newsletter-response-s1 .text-success a {
  color: var(--footer-s1-link-color, #3498db);
}
#footer-6 .footer-section-2 {
  background-color: var(--footer-s2-bg-color, #343a40);
  color: var(--footer-s2-text-color, #f8f9fa);
  padding: 3rem 0;
  font-size: 0.9rem;
}
#footer-6 .footer-section-2 .s2-column-title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--footer-s2-title-color, #ffffff);
  margin-bottom: 1rem;
  padding-bottom: 0.3rem;
  border-bottom: 1px solid var(--footer-s2-link-color, #17a2b8);
  display: inline-block;
}
#footer-6 .footer-section-2 .s2-links-list {
  list-style: none;
  padding-left: 0;
}
#footer-6 .footer-section-2 .s2-links-list li {
  margin-bottom: 0.5rem;
}
#footer-6 .footer-section-2 .s2-links-list a {
  color: var(--footer-s2-link-color, #17a2b8);
  text-decoration: none;
  transition: color 0.2s ease;
}
#footer-6 .footer-section-2 .s2-links-list a:hover,
#footer-6 .footer-section-2 .s2-links-list a.active {
  color: var(--footer-s2-link-hover-color, #138496);
  text-decoration: underline;
}
#footer-6 .footer-section-2 .s2-contact-details p,
#footer-6 .footer-section-2 .s2-contact-details a {
  margin-bottom: 0.4rem;
  font-size: 0.85rem;
  color: var(--footer-s2-text-color);
  opacity: 0.9;
  text-decoration: none;
}
#footer-6 .footer-section-2 .s2-contact-details i {
  width: 16px;
  margin-right: 0.5rem;
  color: var(--footer-s2-link-color, #17a2b8);
}
#footer-6 .footer-section-2 .s2-contact-details a:hover {
  color: var(--footer-s2-link-hover-color, #138496);
  opacity: 1;
}
#footer-6 .footer-section-3 {
  background-color: var(--footer-s3-bg-color, #212529);
  color: var(--footer-s3-text-color, #adb5bd);
  padding: 1.5rem 0;
  font-size: 0.8rem;
}
#footer-6 .footer-section-3 .copyright-text-s3 {
  margin-bottom: 0;
  text-align: center;
}
#footer-6 .footer-section-3 .social-icons-s3 {
  text-align: center;
}
#footer-6 .footer-section-3 .social-icons-s3 a {
  color: var(--footer-s3-social-icon-color, #adb5bd);
  margin: 0 0.6rem;
  font-size: 1.1rem;
  transition: color 0.2s ease;
}
#footer-6 .footer-section-3 .social-icons-s3 a:hover {
  color: var(--footer-s3-social-icon-hover-color, #ffffff);
}
@media (min-width: 768px) {
  #footer-6 .footer-section-1 .row > div {
    /* Align items vertically in section 1 */
    display: flex;
    flex-direction: column;
    justify-content: center;
  }
  #footer-6 .footer-section-3 .copyright-text-s3 {
    text-align: left;
  }
  #footer-6 .footer-section-3 .social-icons-s3 {
    text-align: right;
  }
}
@media (max-width: 991.98px) {
  /* lg breakpoint */
  #footer-6 .footer-section-1 .text-lg-start {
    text-align: center !important;
  }
  #footer-6 .footer-section-1 .align-items-lg-center {
    align-items: stretch !important; /* Let content determine height */
  }
}
@media (max-width: 767.98px) {
  #footer-6 .footer-column-s2 {
    /* For columns in section 2 */
    margin-bottom: 2rem;
  }
  #footer-6 .footer-section-3 .col-md-6 {
    /* Stack copyright and social */
    text-align: center !important;
    margin-bottom: 0.75rem;
  }
  #footer-6 .footer-section-3 .col-md-6:last-child {
    margin-bottom: 0;
  }
}