:root {
  --primary: linear-gradient(135deg, #00c6ff 0%, #0072ff 100%);
  --secondary: #2d3748;
  --accent: #ff7e5f;
  --light: #f8f9fa;
  --dark: #1a202c;
  --text: #2d3748;
  --text-light: #f8f9fa;
  --radius: 12px;
  --shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

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

.header {
  position: relative;
  height: 600px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  margin-bottom: 80px;
}

.header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--primary);
  z-index: -2;
}

.header::after {
  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;
}

.header-content {
  text-align: center;
  color: var(--text-light);
  padding: 40px;
  max-width: 800px;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(10px);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.header h1 {
  font-size: 3rem;
  margin-bottom: 20px;
  background: linear-gradient(to right, #fff, #ff7e5f);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

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

.notice {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background: var(--secondary);
  color: var(--text-light);
  padding: 15px 25px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  z-index: 1000;
  font-size: 0.9rem;
}

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: rgba(45, 55, 72, 0.9);
  backdrop-filter: blur(10px);
  padding: 15px 0;
  z-index: 1000;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.nav-logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-light);
  text-decoration: none;
}

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

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

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

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

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

.main-content {
  padding: 100px 0;
}

.section {
  margin-bottom: 80px;
  padding: 40px;
  background: white;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  position: relative;
  overflow: hidden;
}

.section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 5px;
  height: 100%;
  background: var(--primary);
}

.section-title {
  font-size: 2rem;
  margin-bottom: 30px;
  color: var(--secondary);
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 0;
  width: 50px;
  height: 3px;
  background: var(--accent);
}

.section-content {
  font-size: 1.1rem;
  line-height: 1.8;
  margin-bottom: 30px;
}

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

.card {
  background: white;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.card:hover {
  transform: translateY(-10px);
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

.card-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.card-body {
  padding: 20px;
}

.card-title {
  font-size: 1.3rem;
  margin-bottom: 15px;
  color: var(--secondary);
}

.card-text {
  color: #4a5568;
  margin-bottom: 20px;
}

.code-block {
  background: #2d3748;
  color: #f8f9fa;
  padding: 20px;
  border-radius: var(--radius);
  margin: 30px 0;
  overflow-x: auto;
  font-family: 'Courier New', monospace;
  position: relative;
}

.code-block::before {
  content: 'CSS';
  position: absolute;
  top: 0;
  right: 0;
  background: var(--accent);
  color: white;
  padding: 5px 15px;
  border-radius: 0 0 0 var(--radius);
  font-size: 0.8rem;
}

pre {
  margin: 0;
  white-space: pre-wrap;
}

.footer {
  background: var(--secondary);
  color: var(--text-light);
  padding: 60px 0;
  text-align: center;
}

.footer-content {
  max-width: 800px;
  margin: 0 auto;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 30px;
  margin: 30px 0;
}

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

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

.image-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 20px;
  margin: 40px 0;
}

.gallery-image {
  width: 100%;
  height: 250px;
  object-fit: cover;
  border-radius: var(--radius);
  transition: var(--transition);
  box-shadow: var(--shadow);
}

.gallery-image:hover {
  transform: scale(1.05);
}

@media (max-width: 768px) {
  .header {
    height: 500px;
  }
  
  .header h1 {
    font-size: 2.5rem;
  }
  
  .nav-links {
    gap: 15px;
  }
  
  .section {
    padding: 30px;
  }
  
  .grid {
    grid-template-columns: 1fr;
  }
}

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

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

.highlight {
  background: linear-gradient(90deg, rgba(255,126,95,0.2) 0%, rgba(255,126,95,0) 100%);
  padding: 2px 5px;
  border-radius: 3px;
}