body {
  font-family: 'Poppins', sans-serif;
  margin: 0;
  padding: 0;
  background-color: #f5fdf3;
  color: #333;
  line-height: 1.6;
}

header {
  text-align: center;
  padding: 30px 20px;
  background: #4CAF50;
  color: #fff;
}

header h1 {
  margin: 0;
  font-size: 2.2rem;
}
* {
    user-select: none;
    -webkit-user-select: none;
}
header p {
  margin-top: 5px;
  font-size: 1rem;
}

section {
  max-width: 900px;
  margin: 40px auto;
  padding: 0 20px;
}

/* ✅ Ảnh nằm giữa */
.hero-img,
.sub-img {
  display: block;
  margin: 20px auto;
  width: 570px;
  height: 700px;
  border-radius: 12px;
  object-fit: cover;
}

h2 {
  color: #2c7a36;
  font-size: 1.6rem;
  margin-bottom: 10px;
}

ul {
  margin: 15px 0;
  padding-left: 20px;
}

ul li {
  margin-bottom: 8px;
}

footer {
  text-align: center;
  padding: 20px;
  background: #e8f5e9;
  color: #333;
  margin-top: 40px;
  font-size: 0.9rem;
}