:root {
  --main-dark-blue: #1E3A8A;
  --main-light-blue: #60A5FA;
  --neutral-gray: #F3F4F6;
  --accent-orange: #F97316;
  --text-white: #FFFFFF;
  --text-light: rgba(255,255,255,0.8);
  --shadow-dark: 0 10px 30px rgba(0,0,0,0.2);
  --shadow-light: 0 5px 15px rgba(0,0,0,0.1);
}

@font-face {
  font-family: 'Roboto';
  src: url('https://fonts.googleapis.com/css2?family=Roboto:wght@300;400;500;700&display=swap');
}

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

body {
  font-family: 'Roboto', sans-serif;
  background: linear-gradient(135deg, var(--main-dark-blue), var(--main-light-blue));
  color: var(--text-white);
  line-height: 1.6;
  overflow-x: hidden;
}

.header {
  position: relative;
  padding: 2rem 5%;
  background: rgba(30, 58, 138, 0.8);
  backdrop-filter: blur(10px);
  z-index: 10;
  box-shadow: var(--shadow-dark);
}

.header h1 {
  font-size: 2.5rem;
  font-weight: 700;
  background: linear-gradient(90deg, var(--text-white), var(--main-light-blue));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.notice {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background: var(--accent-orange);
  color: white;
  padding: 10px 15px;
  border-radius: 5px;
  font-size: 14px;
  z-index: 100;
  box-shadow: var(--shadow-light);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(1); }
  50% { transform: scale(1.05); }
  100% { transform: scale(1); }
}

.main-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 5%;
}

.hero {
  position: relative;
  height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 3rem;
  overflow: hidden;
  border-radius: 15px;
  box-shadow: var(--shadow-dark);
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(30,58,138,0.8), rgba(96,165,250,0.8));
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 2rem;
  max-width: 800px;
}

.hero h2 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  text-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.hero p {
  font-size: 1.2rem;
  margin-bottom: 2rem;
  color: var(--text-light);
}

.hero-images {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-top: 2rem;
}

.hero-images img {
  width: 120px;
  height: 120px;
  object-fit: cover;
  border-radius: 10px;
  box-shadow: var(--shadow-light);
  transition: transform 0.3s, box-shadow 0.3s;
}

.hero-images img:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 30px rgba(0,0,0,0.2);
}

article {
  background: rgba(255,255,255,0.1);
  backdrop-filter: blur(10px);
  border-radius: 15px;
  padding: 2.5rem;
  margin-bottom: 3rem;
  box-shadow: var(--shadow-light);
}

article h2 {
  font-size: 2rem;
  margin-bottom: 1.5rem;
  color: var(--text-white);
  position: relative;
  padding-bottom: 10px;
}

article h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100px;
  height: 3px;
  background: var(--accent-orange);
  border-radius: 3px;
}

article h3 {
  font-size: 1.5rem;
  margin: 2rem 0 1rem;
  color: var(--main-light-blue);
}

article p {
  margin-bottom: 1.5rem;
  color: var(--text-light);
}

pre {
  background: rgba(0,0,0,0.2);
  border-radius: 8px;
  padding: 1.5rem;
  margin: 1.5rem 0;
  overflow-x: auto;
  box-shadow: inset 0 0 10px rgba(0,0,0,0.1);
}

code {
  font-family: 'Courier New', monospace;
  color: var(--text-white);
  font-size: 0.9rem;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0;
  background: rgba(255,255,255,0.1);
  border-radius: 8px;
  overflow: hidden;
}

th, td {
  padding: 12px 15px;
  text-align: left;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

th {
  background: rgba(30,58,138,0.5);
  color: var(--text-white);
  font-weight: 500;
}

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

.grid-container {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 2rem;
  margin: 2rem 0;
}

.grid-item {
  background: rgba(255,255,255,0.1);
  border-radius: 10px;
  padding: 1.5rem;
  transition: transform 0.3s, box-shadow 0.3s;
  box-shadow: var(--shadow-light);
}

.grid-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 30px rgba(0,0,0,0.2);
}

.grid-item h4 {
  font-size: 1.2rem;
  margin-bottom: 1rem;
  color: var(--text-white);
}

.grid-item p {
  font-size: 0.9rem;
  color: var(--text-light);
}

.grid-item img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  border-radius: 8px;
  margin-bottom: 1rem;
}

.footer {
  text-align: center;
  padding: 2rem;
  background: rgba(30,58,138,0.8);
  margin-top: 3rem;
  color: var(--text-light);
}

.wave-bg {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 100px;
  background: url('https://images.gptkong.com/demo/sample1.png') repeat-x;
  background-size: 1000px 100px;
  animation: wave 15s linear infinite;
  opacity: 0.3;
}

@keyframes wave {
  0% { background-position-x: 0; }
  100% { background-position-x: 1000px; }
}

@media (max-width: 768px) {
  .header h1 {
    font-size: 2rem;
  }
  
  .hero h2 {
    font-size: 1.8rem;
  }
  
  article {
    padding: 1.5rem;
  }
  
  .grid-container {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .header h1 {
    font-size: 1.5rem;
  }
  
  .hero h2 {
    font-size: 1.5rem;
  }
  
  article h2 {
    font-size: 1.5rem;
  }
  
  article h3 {
    font-size: 1.2rem;
  }
}