:root {
  --primary: #2196F3;
  --secondary: #9E9E9E;
  --accent: #00E676;
  --dark: #0A192F;
  --light: #F8F9FA;
  --glass: rgba(255, 255, 255, 0.2);
  --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Roboto', sans-serif;
}

body {
  background: linear-gradient(135deg, var(--dark) 0%, #162A47 100%);
  color: var(--light);
  line-height: 1.6;
  overflow-x: hidden;
}

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

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: var(--glass);
  backdrop-filter: blur(10px);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 5%;
  z-index: 1000;
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
}

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

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

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

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

.hero {
  min-height: 600px;
  display: flex;
  align-items: center;
  padding-top: 80px;
  position: relative;
  overflow: hidden;
}

.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: 0.1;
  z-index: -1;
}

.hero-content {
  max-width: 600px;
}

.hero h1 {
  font-size: 3rem;
  margin-bottom: 20px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

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

.notice {
  background: rgba(255, 255, 255, 0.1);
  padding: 15px;
  border-radius: 8px;
  margin: 40px 0;
  text-align: center;
  border-left: 3px solid var(--accent);
}

.notice p {
  font-size: 0.9rem;
  opacity: 0.8;
}

article {
  padding: 80px 0;
}

article h2 {
  font-size: 2.5rem;
  margin-bottom: 40px;
  position: relative;
  padding-bottom: 15px;
  color: var(--primary);
}

article h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100px;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: 2px;
}

article h3 {
  font-size: 1.8rem;
  margin: 40px 0 20px;
  color: var(--accent);
}

article p {
  margin-bottom: 20px;
  font-size: 1.1rem;
  line-height: 1.8;
}

.glass-card {
  background: var(--glass);
  backdrop-filter: blur(10px);
  border-radius: 15px;
  padding: 30px;
  margin: 30px 0;
  box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
  border: 1px solid rgba(255, 255, 255, 0.18);
}

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

.card {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid;
  border-image: linear-gradient(45deg, var(--primary), var(--accent)) 1;
  border-radius: 10px;
  padding: 25px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(
    to bottom right,
    rgba(33, 150, 243, 0.1),
    rgba(0, 230, 118, 0.1)
  );
  transform: rotate(45deg);
  z-index: -1;
}

.card:hover {
  transform: translateY(-10px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

.card img {
  width: 100%;
  border-radius: 8px;
  margin-bottom: 15px;
  transition: var(--transition);
}

.card:hover img {
  transform: scale(1.05);
}

pre {
  background: rgba(0, 0, 0, 0.3);
  border-radius: 8px;
  padding: 20px;
  margin: 20px 0;
  overflow-x: auto;
  border-left: 4px solid var(--accent);
}

code {
  font-family: 'Courier New', monospace;
  color: var(--accent);
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 30px 0;
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(5px);
}

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

th {
  background: rgba(0, 0, 0, 0.2);
  color: var(--accent);
}

tr:hover {
  background: rgba(255, 255, 255, 0.05);
}

.footer {
  background: rgba(0, 0, 0, 0.8);
  padding: 50px 0;
  margin-top: 80px;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
}

.footer-column h4 {
  margin-bottom: 20px;
  color: var(--accent);
}

.footer-column ul {
  list-style: none;
}

.footer-column ul li {
  margin-bottom: 10px;
}

.footer-column ul li a {
  color: var(--light);
  text-decoration: none;
  transition: var(--transition);
}

.footer-column ul li a:hover {
  color: var(--accent);
}

.copyright {
  text-align: center;
  padding-top: 30px;
  margin-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  opacity: 0.7;
}

@media (max-width: 768px) {
  .navbar {
    flex-direction: column;
    padding: 15px;
  }
  
  .nav-links {
    margin-top: 15px;
    flex-wrap: wrap;
    justify-content: center;
  }
  
  .hero h1 {
    font-size: 2.2rem;
  }
  
  article h2 {
    font-size: 2rem;
  }
  
  article h3 {
    font-size: 1.5rem;
  }
}

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

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

.decorative-line {
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--primary), transparent);
  margin: 40px 0;
  opacity: 0.5;
}