:root {
  --primary: rgba(224, 247, 250, 0.9);
  --secondary: rgba(225, 190, 231, 0.8);
  --accent: #29b6f6;
  --text: #333;
  --card-bg: rgba(255, 255, 255, 0.2);
  --shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  color: var(--text);
  line-height: 1.6;
  padding-top: 80px;
}

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

.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  background: rgba(255, 255, 255, 0.3);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 30px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  z-index: 1000;
}

.navbar .logo {
  font-size: 1.8em;
  font-weight: 700;
  color: var(--accent);
  text-decoration: none;
  display: flex;
  align-items: center;
}

.navbar .logo::before {
  content: "";
  display: inline-block;
  width: 30px;
  height: 30px;
  background: url('https://images.gptkong.com/demo/sample1.png') center/cover;
  margin-right: 10px;
  border-radius: 50%;
}

.nav-links {
  display: flex;
  gap: 25px;
}

.nav-links a {
  color: var(--text);
  text-decoration: none;
  font-weight: 500;
  transition: all 0.3s ease;
  position: relative;
  padding: 5px 0;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width 0.3s ease;
}

.nav-links a:hover {
  color: var(--accent);
}

.nav-links a:hover::after {
  width: 100%;
}

.hero {
  height: 500px;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  margin-bottom: 60px;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: url('https://images.gptkong.com/demo/sample2.png') center/cover;
  opacity: 0.2;
  z-index: -1;
}

.hero-content {
  max-width: 600px;
  padding: 40px;
  background: var(--card-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-radius: 20px;
  box-shadow: var(--shadow);
  border: 1px solid rgba(255, 255, 255, 0.3);
  transform: translateY(20px);
  animation: float 3s ease-in-out infinite alternate;
}

@keyframes float {
  0% {
    transform: translateY(20px);
  }
  100% {
    transform: translateY(-10px);
  }
}

.hero h1 {
  font-size: 2.5em;
  margin-bottom: 20px;
  color: var(--accent);
}

.hero p {
  font-size: 1.1em;
  margin-bottom: 30px;
}

.notice {
  background: rgba(255, 255, 255, 0.5);
  padding: 15px;
  border-radius: 10px;
  margin: 30px 0;
  text-align: center;
  font-weight: 500;
  color: #555;
}

article {
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(5px);
  -webkit-backdrop-filter: blur(5px);
  border-radius: 20px;
  padding: 40px;
  margin-bottom: 60px;
  box-shadow: var(--shadow);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

article h2 {
  font-size: 2em;
  color: var(--accent);
  margin-bottom: 30px;
  position: relative;
  padding-bottom: 15px;
}

article h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100px;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), transparent);
}

article h3 {
  font-size: 1.5em;
  margin: 25px 0 15px;
  color: var(--accent);
}

article p {
  margin-bottom: 20px;
  font-size: 1.05em;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 30px;
  margin: 40px 0;
}

.card {
  background: var(--card-bg);
  border-radius: 15px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.3);
  padding: 25px;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}

.card-img {
  height: 200px;
  background-size: cover;
  background-position: center;
  border-radius: 10px;
  margin-bottom: 20px;
}

.card:nth-child(1) .card-img {
  background-image: url('https://images.gptkong.com/demo/sample3.png');
}

.card:nth-child(2) .card-img {
  background-image: url('https://images.gptkong.com/demo/sample4.png');
}

.card:nth-child(3) .card-img {
  background-image: url('https://images.gptkong.com/demo/sample5.png');
}

.card h4 {
  font-size: 1.3em;
  margin-bottom: 15px;
  color: var(--accent);
}

pre {
  background: rgba(0, 0, 0, 0.1);
  backdrop-filter: blur(5px);
  -webkit-backdrop-filter: blur(5px);
  border-radius: 10px;
  padding: 20px;
  overflow-x: auto;
  margin: 25px 0;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

code {
  font-family: 'Courier New', Courier, monospace;
  font-size: 0.9em;
  color: #f8f8f2;
  background: transparent;
}

.button {
  display: inline-block;
  background: var(--accent);
  color: white;
  padding: 12px 25px;
  border-radius: 25px;
  text-decoration: none;
  font-weight: 500;
  transition: all 0.3s ease;
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 15px rgba(41, 182, 246, 0.3);
}

.button:hover {
  background: #0288d1;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(41, 182, 246, 0.4);
}

.footer {
  text-align: center;
  padding: 30px;
  margin-top: 60px;
  background: rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(5px);
  -webkit-backdrop-filter: blur(5px);
  border-top: 1px solid rgba(255, 255, 255, 0.3);
}

@media (max-width: 768px) {
  .navbar {
    flex-direction: column;
    padding: 15px;
  }
  
  .nav-links {
    margin-top: 15px;
    flex-wrap: wrap;
    justify-content: center;
  }
  
  .hero {
    height: auto;
    padding: 60px 0;
  }
  
  .hero-content {
    margin: 0 20px;
  }
  
  .card-grid {
    grid-template-columns: 1fr;
  }
  
  article {
    padding: 25px;
  }
}

@media (max-width: 480px) {
  .navbar .logo {
    font-size: 1.5em;
  }
  
  .hero h1 {
    font-size: 2em;
  }
  
  article h2 {
    font-size: 1.7em;
  }
  
  article h3 {
    font-size: 1.3em;
  }
}