.font-bevietnam {
    font-family: 'Be Vietnam Pro', sans-serif;
  }
  .menu-button {
    position: relative;
    color: #111c64; /* màu xanh đậm mặc định */
    font-weight: 600;
    transition: color 0.3s ease;
  }

  .menu-button::after {
    content: "";
    position: absolute;
    left: 50%;
    bottom: 5px;
    transform: translateX(-50%) scaleX(0); /* bắt đầu từ giữa, thu nhỏ lại */
    transform-origin: center;
    width: 100%;
    height: 3px;
    background-color: #fbbf00;
    transition: transform 0.3s ease;
  }

  .menu-button:hover {
    color: #fbbf00; /* chữ chuyển vàng khi hover */
  }

  .menu-button:hover::after {
    transform: translateX(-50%) scaleX(1); /* mở rộng từ giữa ra 2 bên */
  }
  .logo-link::after {
    content: "";
    position: absolute;
    left: 50%;
    bottom: 0;
    transform: translateX(-50%) scaleX(0);
    transform-origin: center;
    width: 100%;
    height: 3px;
    background-color: #fbbf00;
    transition: transform 0.3s ease;
  }

  .logo-link:hover {
    color: #fbbf00;
  }

  .logo-link:hover::after {
    transform: translateX(-50%) scaleX(1);
  }
  .group:hover .group-hover\:block {
    display: block;
    animation: fadeIn 0.3s ease-in-out;
  }

  @keyframes fadeIn {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
  }
/* Ảnh hover: scale và shadow mượt mà */
section img {
  transition: transform 0.4s ease, box-shadow 0.4s ease;
  cursor: pointer;
}
section img:hover {
  transform: scale(1.07);
  box-shadow: 0 12px 25px rgba(0, 0, 0, 0.25);
}

/* Tiêu đề lớn có hiệu ứng fade-in và slight slide */
[data-aos][data-aos][data-aos][data-aos] h1 {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}
[data-aos].aos-animate h1 {
  opacity: 1;
  transform: translateY(0);
}

/* Các đoạn văn có khoảng cách thoáng hơn */
section p {
  margin-bottom: 1rem;
  line-height: 1.6;
}

/* Nút bấm */
.btn {
  transition: background-color 0.3s ease, color 0.3s ease;
}
.btn-primary:hover {
  background-color: #004aad; /* xanh đậm hơn */
  color: #fff;
}
.btn-danger:hover {
  background-color: #b31b1b; /* đỏ đậm hơn */
  color: #fff;
}
.btn-outline-primary:hover {
  background-color: #0d6efd;
  color: white;
  border-color: #0d6efd;
}

/* Hiệu ứng hover nhẹ cho phần nội dung bên phải */
.col-lg-6[data-aos="fade-left"]:hover {
  transform: translateX(10px);
  transition: transform 0.4s ease;
}

/* Toàn bộ section padding và margin phù hợp */
section {
  padding-top: 60px;
  padding-bottom: 60px;
}

/* Responsive text size (tuỳ chọn) */
@media (max-width: 767px) {
  h1.display-4 {
    font-size: 2rem;
  }
  h1.display-5 {
    font-size: 1.75rem;
  }
  h1.display-6 {
    font-size: 1.5rem;
  }
}
/* Ảnh hover: scale và shadow nhẹ, mượt mà */
section img {
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1), 
              box-shadow 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  cursor: pointer;
  will-change: transform, box-shadow;
  border-radius: 0.75rem; /* bo tròn ảnh */
}
section img:hover {
  transform: scale(1.08);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.25);
}

/* Tiêu đề lớn có hiệu ứng fade-in + nhẹ nâng lên */
[data-aos].aos-animate h1 {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
[data-aos] h1 {
  opacity: 0;
  transform: translateY(20px);
}

/* Khoảng cách giữa các đoạn văn tốt hơn, line-height dễ đọc */
section p {
  margin-bottom: 1.25rem;
  line-height: 1.65;
  color: #4a4a4a;
  font-weight: 400;
}

/* Nút bấm */
.btn {
  border-radius: 0.5rem;
  font-weight: 600;
  padding: 0.7rem 1.8rem;
  transition: background-color 0.3s ease, color 0.3s ease, box-shadow 0.3s ease;
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
}
.btn-primary {
  background-color: #0d6efd;
  border-color: #0d6efd;
  color: #fff;
}
.btn-primary:hover {
  background-color: #084fc1;
  border-color: #084fc1;
  box-shadow: 0 8px 20px rgba(13, 110, 253, 0.5);
  color: #fff;
}
.btn-danger {
  background-color: #dc3545;
  border-color: #dc3545;
  color: #fff;
}
.btn-danger:hover {
  background-color: #a52730;
  border-color: #a52730;
  box-shadow: 0 8px 20px rgba(220, 53, 69, 0.5);
  color: #fff;
}
.btn-outline-primary {
  color: #0d6efd;
  border-color: #0d6efd;
}
.btn-outline-primary:hover {
  background-color: #0d6efd;
  color: #fff;
  border-color: #0d6efd;
  box-shadow: 0 8px 20px rgba(13, 110, 253, 0.5);
}

/* Hiệu ứng hover nhẹ nhàng cho phần nội dung bên phải */
.col-lg-6[data-aos="fade-left"] {
  will-change: transform;
  transition: transform 0.5s ease;
  cursor: default;
}
.col-lg-6[data-aos="fade-left"]:hover {
  transform: translateX(15px);
}

/* Padding section tăng lên để không bị chật */
section {
  padding-top: 70px;
  padding-bottom: 70px;
  background-clip: padding-box;
}

/* Responsive font size */
@media (max-width: 767px) {
  h1.display-4 {
    font-size: 2rem;
  }
  h1.display-5 {
    font-size: 1.75rem;
  }
  h1.display-6 {
    font-size: 1.5rem;
  }
}

/* Thêm hiệu ứng fade nhẹ cho paragraph khi xuất hiện */
[data-aos="fade-left"] p, [data-aos="fade-right"] p {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
[data-aos].aos-animate p {
  opacity: 1;
  transform: translateY(0);
}
/* Font */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;600;700&display=swap');

body {
  font-family: 'Poppins', sans-serif;
  background-color: #f9faff;
  color: #343a40;
  line-height: 1.6;
}

/* Container padding */
main > div.py-12 {
  padding-top: 4rem;
  padding-bottom: 4rem;
  padding-left: 2rem;
  padding-right: 2rem;
  max-width: 1140px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 6rem;
}

/* Section styling */
section {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 3rem 2rem;
  border-radius: 20px;
  box-shadow: 0 12px 30px rgb(0 0 0 / 0.08);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  background-color: #ffffff;
}

/* Alternate background colors */
section:nth-child(odd) {
  background-color: #ffffff;
}

section:nth-child(even) {
  background-color: #f0f4ff;
}

/* Hover effect */
section:hover {
  transform: translateY(-8px);
  box-shadow: 0 25px 45px rgba(0, 0, 0, 0.15);
}

/* Grid for image and content */
.container-fluid > .row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 3rem;
}

/* Left image */
.col-lg-6.text-center img {
  max-height: 480px;
  width: 100%;
  object-fit: cover;
  border-radius: 1rem;
  box-shadow: 0 8px 20px rgb(0 0 0 / 0.1);
  transition: transform 0.4s ease;
}

.col-lg-6.text-center img:hover {
  transform: scale(1.05);
}

/* Right content */
.col-lg-6 {
  flex: 1;
}

/* Titles */
h1.display-4, h1.display-5, h1.display-6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1.5rem;
  color: #2a3d66; /* Dark blueish */
}

/* Adjust sizes */
h1.display-4 {
  font-size: 3rem;
}

h1.display-5 {
  font-size: 2.5rem;
  color: #d6336c; /* dark pink/red */
}

h1.display-6 {
  font-size: 2rem;
}

/* Paragraph styles */
p.lead {
  font-size: 1.25rem;
  font-weight: 500;
  color: #5a5f7d;
  margin-bottom: 1rem;
}

p.fs-5 {
  font-size: 1.1rem;
  font-weight: 400;
  color: #3a3f58;
  margin-bottom: 1rem;
}

p.fs-6 {
  font-size: 0.9rem;
  font-weight: 300;
  color: #7a7f9a;
}

/* Buttons */
a.btn {
  font-weight: 600;
  padding: 0.75rem 2rem;
  border-radius: 50px;
  box-shadow: 0 6px 20px rgba(41, 128, 185, 0.25);
  transition: background-color 0.3s ease, box-shadow 0.3s ease, transform 0.3s ease;
  display: inline-block;
  text-decoration: none;
}

/* Primary */
a.btn.btn-primary {
  background: linear-gradient(135deg, #4a90e2, #357ABD);
  color: #fff;
  border: none;
}

a.btn.btn-primary:hover {
  background: linear-gradient(135deg, #357ABD, #2a5c9e);
  box-shadow: 0 12px 30px rgba(53, 122, 189, 0.6);
  transform: translateY(-3px);
}

/* Danger */
a.btn.btn-danger {
  background: linear-gradient(135deg, #e8505b, #d62f44);
  color: #fff;
  border: none;
}

a.btn.btn-danger:hover {
  background: linear-gradient(135deg, #d62f44, #b92c3e);
  box-shadow: 0 12px 30px rgba(214, 47, 68, 0.6);
  transform: translateY(-3px);
}

/* Outline primary */
a.btn.btn-outline-primary {
  background: transparent;
  border: 2px solid #4a90e2;
  color: #4a90e2;
  font-weight: 600;
}

a.btn.btn-outline-primary:hover {
  background: #4a90e2;
  color: white;
  box-shadow: 0 12px 30px rgba(74, 144, 226, 0.6);
  transform: translateY(-3px);
}

/* Responsive */
@media (max-width: 991px) {
  section {
    flex-direction: column;
    text-align: center;
  }

  .col-lg-6 {
    width: 100%;
  }

  .col-lg-6.text-center img {
    max-height: 300px;
    margin-bottom: 1.5rem;
  }
}
.py-12 > section {
  width: 100vw;
  position: relative;
  left: 50%;
  right: 50%;
  margin-left: -50vw;
  margin-right: -50vw;
}
html {
  scroll-behavior: smooth;
}
.content-highlight {
  background: rgba(255, 255, 255, 0.85); /* nền trắng mờ */
  padding: 1.5rem;
  border-radius: 12px;
  box-shadow: 0 4px 15px rgba(0,0,0,0.1);
  transition: box-shadow 0.3s ease;
}

.content-highlight:hover {
  box-shadow: 0 8px 25px rgba(0,0,0,0.2);
}
.btn-primary {
  background-color: #0d3b66;
  border-color: #0d3b66;
  font-weight: 600;
  transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

.btn-primary:hover {
  background-color: #08407a;
  box-shadow: 0 4px 12px rgba(13, 59, 102, 0.5);
}
/* Font và tổng thể */
body, main {
  font-family: 'Be Vietnam Pro', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  color: #212529;
  line-height: 1.6;
}

/* Tiêu đề chính (display-4, display-5, display-6) */
.display-4, .display-5, .display-6 {
  font-weight: 800;
  letter-spacing: -0.025em;
  line-height: 1.1;
  margin-bottom: 1rem;
  font-family: 'Be Vietnam Pro', sans-serif;
  text-transform: uppercase; /* tạo nét trẻ trung, có thể bỏ nếu muốn nghiêm túc hơn */
  text-shadow: 1px 1px 3px rgba(0,0,0,0.1);
  transition: color 0.3s ease;
}

/* Màu tiêu đề cho từng loại */
.display-4 {
  color: #0d3b66; /* xanh đậm tươi */
  font-size: 3.25rem;
}

.display-5 {
  color: #dc3545; /* đỏ nổi bật */
  font-size: 2.5rem;
}

.display-6 {
  color: #0d3b66;
  font-size: 1.75rem;
  text-transform: none; /* bớt nghiêm túc hơn */
}

/* Đoạn mô tả chính (lead) */
.lead {
  font-size: 1.25rem;
  font-weight: 600;
  color: #495057; /* màu xám đậm, đọc thoải mái */
  margin-bottom: 1.25rem;
  line-height: 1.5;
}

/* Đoạn nội dung phụ */
.fs-5 {
  font-size: 1.1rem;
  color: #343a40; /* xám đậm */
  margin-bottom: 1rem;
}

.fs-6 {
  font-size: 0.95rem;
  color: #6c757d; /* xám vừa phải */
  margin-bottom: 1rem;
  font-style: italic;
}

/* Hiệu ứng hover trên tiêu đề */
section:hover .display-4,
section:hover .display-5,
section:hover .display-6 {
  color: #ff6f61; /* màu cam sáng nổi bật */
  text-shadow: 2px 2px 5px rgba(255,111,97,0.5);
  cursor: default;
}

/* Nút bấm */
.btn-primary, .btn-danger, .btn-outline-primary {
  font-weight: 700;
  border-radius: 30px;
  padding: 0.75rem 2rem;
  font-size: 1.1rem;
  letter-spacing: 0.03em;
  transition: background-color 0.3s ease, box-shadow 0.3s ease, color 0.3s ease;
  box-shadow: 0 3px 6px rgba(0,0,0,0.1);
}

.btn-primary:hover {
  background-color: #08407a;
  box-shadow: 0 6px 15px rgba(8, 64, 122, 0.6);
  color: #fff;
}

.btn-danger:hover {
  background-color: #a71d2a;
  box-shadow: 0 6px 15px rgba(167, 29, 42, 0.6);
  color: #fff;
}

.btn-outline-primary:hover {
  background-color: #0d3b66;
  color: #fff;
  box-shadow: 0 6px 15px rgba(13, 59, 102, 0.6);
}

/* Nội dung bên phải box (nâng cấp hiệu ứng và khoảng cách) */
.content-highlight, .col-lg-6 > div {
  background: rgba(255, 255, 255, 0.92);
  padding: 2rem 2.5rem;
  border-radius: 20px;
  box-shadow: 0 8px 20px rgba(0,0,0,0.08);
  transition: box-shadow 0.3s ease;
}

.content-highlight:hover, .col-lg-6 > div:hover {
  box-shadow: 0 12px 35px rgba(0,0,0,0.15);
}

/* Responsive: Giảm kích thước tiêu đề nhỏ hơn trên màn hình nhỏ */
@media (max-width: 768px) {
  .display-4 {
    font-size: 2.5rem;
  }
  .display-5 {
    font-size: 2rem;
  }
  .display-6 {
    font-size: 1.4rem;
  }
}
.col-lg-6 img:hover {
  transform: scale(1.05);
  box-shadow: 0 10px 20px rgba(0,0,0,0.2);
  transition: transform 0.4s ease, box-shadow 0.4s ease;
}
@keyframes fade-in {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fade-in-up {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fade-in-down {
  from { opacity: 0; transform: translateY(-20px); }
  to { opacity: 1; transform: translateY(0); }
}
.animate-fade-in     { animation: fade-in 0.8s ease-out both; }
.animate-fade-in-up  { animation: fade-in-up 0.8s ease-out both; }
.animate-fade-in-down{ animation: fade-in-down 0.8s ease-out both; }
@keyframes fade-in-up {
  0% { opacity: 0; transform: translateY(20px); }
  100% { opacity: 1; transform: translateY(0); }
}
@keyframes fade-in-down {
  0% { opacity: 0; transform: translateY(-20px); }
  100% { opacity: 1; transform: translateY(0); }
}
.animate-fade-in-up {
  animation: fade-in-up 0.8s ease-out both;
}
.animate-fade-in-down {
  animation: fade-in-down 0.8s ease-out both;
}