:root {
  --primary: #1A237E;
  --secondary: #00C853;
  --accent: #FFFFFF;
  --text: #E8EAF6;
  --dark: #0A0F3D;
  --light: #F5F5F5;
}

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

body {
  font-family: 'Roboto', sans-serif;
  background: var(--dark);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
}

.notice {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background: rgba(0,0,0,0.7);
  color: var(--accent);
  padding: 10px 20px;
  border-radius: 30px;
  z-index: 1000;
  font-size: 14px;
  box-shadow: 0 4px 20px rgba(0,200,83,0.3);
}

.header {
  position: relative;
  height: 80vh;
  min-height: 600px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary), var(--dark));
  overflow: hidden;
  padding: 0 10%;
}

.header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: url('https://images.gptkong.com/demo/sample1.png') center/cover no-repeat;
  opacity: 0.1;
  z-index: 0;
}

.header-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 800px;
}

.header h1 {
  font-size: 3.5rem;
  margin-bottom: 20px;
  background: linear-gradient(to right, var(--accent), var(--secondary));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-shadow: 0 2px 10px rgba(0,0,0,0.3);
}

.header p {
  font-size: 1.2rem;
  margin-bottom: 30px;
  opacity: 0.9;
}

.scroll-down {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  color: var(--accent);
  font-size: 2rem;
  animation: bounce 2s infinite;
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% {transform: translateY(0) translateX(-50%);}
  40% {transform: translateY(-20px) translateX(-50%);}
  60% {transform: translateY(-10px) translateX(-50%);}
}

.nav {
  position: fixed;
  top: 0;
  width: 100%;
  background: rgba(26, 35, 126, 0.9);
  backdrop-filter: blur(10px);
  padding: 15px 5%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 100;
  box-shadow: 0 4px 30px rgba(0,0,0,0.1);
}

.nav-logo {
  font-size: 1.5rem;
  font-weight: bold;
  color: var(--accent);
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: 30px;
}

.nav-links a {
  color: var(--accent);
  text-decoration: none;
  font-size: 1rem;
  position: relative;
  padding: 5px 0;
  transition: all 0.3s ease;
}

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

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 100px 5%;
}

.section {
  margin-bottom: 100px;
}

.section-title {
  font-size: 2.5rem;
  margin-bottom: 50px;
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 0;
  width: 60px;
  height: 4px;
  background: var(--secondary);
  border-radius: 2px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  margin-bottom: 50px;
}

.card {
  background: rgba(255,255,255,0.05);
  border-radius: 15px;
  padding: 30px;
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,0.1);
  box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.card:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 35px rgba(0,200,83,0.2);
  border-color: rgba(0,200,83,0.3);
}

.card-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: 10px;
  margin-bottom: 20px;
  box-shadow: 0 5px 15px rgba(0,0,0,0.2);
  transition: all 0.3s ease;
}

.card:hover .card-img {
  transform: scale(1.03);
  box-shadow: 0 8px 25px rgba(0,200,83,0.3);
}

.card h3 {
  font-size: 1.5rem;
  margin-bottom: 15px;
  color: var(--accent);
}

.card p {
  opacity: 0.8;
  margin-bottom: 20px;
}

.code-block {
  background: rgba(0,0,0,0.3);
  border-radius: 10px;
  padding: 20px;
  margin: 30px 0;
  overflow: auto;
  border-left: 4px solid var(--secondary);
}

code {
  font-family: 'Courier New', monospace;
  color: var(--secondary);
  font-size: 0.9rem;
  line-height: 1.5;
}

pre {
  margin: 0;
}

.table {
  width: 100%;
  border-collapse: collapse;
  margin: 30px 0;
  background: rgba(255,255,255,0.05);
  backdrop-filter: blur(10px);
  border-radius: 10px;
  overflow: hidden;
}

.table th, .table td {
  padding: 15px;
  text-align: left;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.table th {
  background: rgba(0,200,83,0.1);
  color: var(--secondary);
}

.table tr:hover {
  background: rgba(0,200,83,0.05);
}

.footer {
  background: linear-gradient(to right, var(--primary), var(--dark));
  padding: 50px 5%;
  text-align: center;
}

.footer p {
  opacity: 0.7;
  margin-bottom: 20px;
}

.particle {
  position: absolute;
  width: 5px;
  height: 5px;
  background: var(--secondary);
  border-radius: 50%;
  animation: particleMove 10s infinite;
  opacity: 0.6;
}

@keyframes particleMove {
  0% { transform: translate(0, 0); }
  50% { transform: translate(50px, 50px); }
  100% { transform: translate(0, 0); }
}

@media (max-width: 768px) {
  .header h1 {
    font-size: 2.5rem;
  }
  
  .nav-links {
    gap: 15px;
  }
  
  .grid {
    grid-template-columns: 1fr;
  }
  
  .section-title {
    font-size: 2rem;
  }
}

@media (max-width: 480px) {
  .header h1 {
    font-size: 2rem;
  }
  
  .nav {
    flex-direction: column;
    gap: 15px;
    padding: 15px;
  }
  
  .nav-links {
    flex-wrap: wrap;
    justify-content: center;
  }
}