:root {
  --primary: #1e1e1e;
  --secondary: #2c3e50;
  --accent: #3498db;
  --highlight: #9b59b6;
  --text: #bdc3c7;
  --light: #ecf0f1;
}

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

@font-face {
  font-family: 'Orbitron';
  src: url('https://fonts.googleapis.com/css2?family=Orbitron:wght@400;700&display=swap');
}

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

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

.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: linear-gradient(135deg, var(--secondary), #4ca1af);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
  z-index: 1000;
  padding: 20px 0;
  backdrop-filter: blur(10px);
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-family: 'Orbitron', sans-serif;
  font-size: 1.8rem;
  color: var(--light);
  text-decoration: none;
  transition: all 0.3s ease;
}

.logo:hover {
  color: var(--accent);
}

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

.nav-link {
  color: var(--light);
  text-decoration: none;
  font-size: 1.1rem;
  transition: all 0.3s ease;
  position: relative;
}

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width 0.3s ease;
}

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

.hero {
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  position: relative;
  overflow: hidden;
  padding-top: 80px;
}

.hero::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: 0.2;
  z-index: -1;
}

.hero-content {
  max-width: 800px;
  padding: 40px;
  background: rgba(30, 30, 30, 0.8);
  border-radius: 15px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(5px);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.hero h1 {
  font-family: 'Orbitron', sans-serif;
  font-size: 3.5rem;
  margin-bottom: 20px;
  color: var(--light);
  text-shadow: 0 0 10px rgba(52, 152, 219, 0.5);
}

.hero p {
  font-size: 1.2rem;
  margin-bottom: 30px;
  color: var(--text);
}

.scroll-down {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  color: var(--light);
  font-size: 1.5rem;
  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%);
  }
}

.section {
  padding: 100px 0;
  position: relative;
}

.section-title {
  font-family: 'Orbitron', sans-serif;
  font-size: 2.5rem;
  margin-bottom: 50px;
  text-align: center;
  color: var(--light);
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 100px;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--highlight));
}

.content-block {
  background: rgba(44, 62, 80, 0.2);
  border-radius: 15px;
  padding: 40px;
  margin-bottom: 50px;
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.05);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.content-block:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.3);
}

.content-block h3 {
  font-family: 'Orbitron', sans-serif;
  font-size: 1.8rem;
  margin-bottom: 20px;
  color: var(--light);
}

.content-block p {
  margin-bottom: 20px;
  font-size: 1.1rem;
}

.code-block {
  background: rgba(0, 0, 0, 0.5);
  border-radius: 10px;
  padding: 20px;
  margin: 20px 0;
  overflow-x: auto;
  font-family: 'Courier New', monospace;
  border-left: 4px solid var(--accent);
}

.code-block code {
  color: #f8f8f2;
  font-size: 0.9rem;
  line-height: 1.5;
}

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

.image-card {
  position: relative;
  border-radius: 15px;
  overflow: hidden;
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.3);
  transition: transform 0.3s ease;
}

.image-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.image-card:hover {
  transform: translateY(-10px);
}

.image-card:hover img {
  transform: scale(1.1);
}

.image-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(to bottom, rgba(0,0,0,0.1), rgba(0,0,0,0.7));
}

.table-container {
  overflow-x: auto;
  margin: 40px 0;
}

table {
  width: 100%;
  border-collapse: collapse;
  background: rgba(44, 62, 80, 0.3);
  border-radius: 10px;
  overflow: hidden;
}

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

th {
  background: rgba(52, 152, 219, 0.2);
  color: var(--light);
  font-family: 'Orbitron', sans-serif;
}

tr:hover {
  background: rgba(52, 152, 219, 0.1);
}

.footer {
  background: linear-gradient(135deg, var(--secondary), #1a252f);
  padding: 50px 0;
  text-align: center;
}

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

.social-links {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-bottom: 30px;
}

.social-link {
  color: var(--light);
  font-size: 1.5rem;
  transition: color 0.3s ease;
}

.social-link:hover {
  color: var(--accent);
}

.notice {
  background: rgba(52, 152, 219, 0.2);
  padding: 15px;
  border-radius: 5px;
  margin: 20px 0;
  text-align: center;
  border-left: 4px solid var(--accent);
}

@media (max-width: 768px) {
  .nav-links {
    gap: 15px;
  }
  
  .hero h1 {
    font-size: 2.5rem;
  }
  
  .section {
    padding: 60px 0;
  }
  
  .section-title {
    font-size: 2rem;
  }
  
  .content-block {
    padding: 25px;
  }
  
  .image-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .nav {
    flex-direction: column;
    gap: 20px;
  }
  
  .hero h1 {
    font-size: 2rem;
  }
  
  .hero-content {
    padding: 20px;
  }
  
  .section-title {
    font-size: 1.8rem;
  }
}

/* Animations */
@keyframes float {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-20px);
  }
}

.floating {
  animation: float 6s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

.pulsing {
  animation: pulse 2s ease-in-out infinite;
}

/* Decorative elements */
.decorative-line {
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  margin: 40px auto;
  width: 80%;
}

.circle {
  position: absolute;
  border-radius: 50%;
  background: radial-gradient(circle, var(--accent), transparent 70%);
  opacity: 0.1;
  z-index: -1;
}

.circle-1 {
  width: 300px;
  height: 300px;
  top: 10%;
  left: 5%;
  animation: float 8s ease-in-out infinite;
}

.circle-2 {
  width: 200px;
  height: 200px;
  bottom: 15%;
  right: 10%;
  animation: float 10s ease-in-out infinite reverse;
}

.circle-3 {
  width: 150px;
  height: 150px;
  top: 40%;
  right: 20%;
  animation: float 7s ease-in-out infinite;
}

/* Tooltip */
.tooltip {
  position: relative;
  display: inline-block;
  border-bottom: 1px dotted var(--accent);
  cursor: help;
}

.tooltip .tooltiptext {
  visibility: hidden;
  width: 200px;
  background-color: var(--secondary);
  color: var(--light);
  text-align: center;
  border-radius: 6px;
  padding: 10px;
  position: absolute;
  z-index: 1;
  bottom: 125%;
  left: 50%;
  transform: translateX(-50%);
  opacity: 0;
  transition: opacity 0.3s;
}

.tooltip:hover .tooltiptext {
  visibility: visible;
  opacity: 1;
}