body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: linear-gradient(135deg, #6A82FB, #FC5C7D);
  color: #fff;
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
  box-sizing: border-box;
}

header {
  text-align: center;
  padding: 40px 0;
}

header h1 {
  font-family: 'Helvetica Neue', sans-serif;
  font-size: 3rem;
  margin-bottom: 10px;
}

.nav {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-bottom: 40px;
}

.nav a {
  color: #fff;
  text-decoration: none;
  font-size: 1.2rem;
  transition: color 0.3s ease;
}

.nav a:hover {
  color: #FF6F61;
}

.hero {
  background: url('https://images.gptkong.com/product/iphone16/iphone16-1.png') no-repeat center bottom;
  background-size: contain;
  height: 400px;
  position: relative;
  margin-bottom: 40px;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.2);
}

.hero-content {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
}

.hero-content h2 {
  font-size: 2.5rem;
  margin-bottom: 20px;
}

.cta-button {
  display: inline-block;
  background: #FF6F61;
  color: #fff;
  padding: 15px 30px;
  border-radius: 30px;
  text-decoration: none;
  font-size: 1.2rem;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.cta-button:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
}

.features {
  background: #F5F5F5;
  color: #333;
  padding: 40px 0;
  border-radius: 10px;
  margin-bottom: 40px;
}

.features h2 {
  text-align: center;
  margin-bottom: 30px;
  color: #6A82FB;
}

.feature-item {
  display: flex;
  align-items: center;
  margin-bottom: 30px;
}

.feature-item img {
  width: 150px;
  margin-right: 20px;
  border-radius: 10px;
}

.feature-item:last-child {
  margin-bottom: 0;
}

.specs {
  background: #fff;
  color: #333;
  padding: 40px;
  border-radius: 10px;
  margin-bottom: 40px;
}

.specs h2 {
  text-align: center;
  margin-bottom: 30px;
  color: #FC5C7D;
}

.specs ul {
  list-style: none;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
}

.specs li {
  background: #F5F5F5;
  padding: 15px;
  border-radius: 5px;
  text-align: center;
}

.testimonials {
  background: #6A82FB;
  color: #fff;
  padding: 40px;
  border-radius: 10px;
  margin-bottom: 40px;
}

.testimonials h2 {
  text-align: center;
  margin-bottom: 30px;
}

.purchase {
  text-align: center;
  padding: 40px 0;
}

@media (max-width: 768px) {
  header h1 {
    font-size: 2rem;
  }
  
  .hero {
    height: 300px;
  }
  
  .feature-item {
    flex-direction: column;
    text-align: center;
  }
  
  .feature-item img {
    margin-bottom: 20px;
    margin-right: 0;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 10px;
  }
  
  .nav {
    flex-direction: column;
    align-items: center;
  }
  
  .cta-button {
    font-size: 1rem;
    padding: 10px 20px;
  }
}