:root {
  --primary-blue: #A0C4E8;
  --primary-purple: #B593F7;
  --light-gray: #F2F2F2;
  --white: #FFFFFF;
  --accent-orange: #FFA500;
  --accent-green: #4CAF50;
  --text-dark: #333333;
  --text-light: #F8F9FA;
  --shadow-sm: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 8px 32px rgba(31, 38, 135, 0.37);
  --radius-sm: 8px;
  --radius-md: 15px;
  --transition: all 0.3s ease;
}

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

body {
  background: linear-gradient(135deg, var(--light-gray), var(--white));
  color: var(--text-dark);
  line-height: 1.6;
  padding: 0;
  margin: 0;
  min-height: 100%;
}

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

.header {
  background: linear-gradient(135deg, var(--primary-blue), var(--primary-purple));
  color: var(--white);
  padding: 60px 0;
  text-align: center;
  margin-bottom: 60px;
  position: relative;
  overflow: hidden;
}

.header::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0) 70%);
  animation: pulse 15s infinite alternate;
}

@keyframes pulse {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.header h1 {
  font-size: 2.8rem;
  margin-bottom: 20px;
  position: relative;
  z-index: 2;
  text-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.header p {
  font-size: 1.2rem;
  max-width: 700px;
  margin: 0 auto;
  position: relative;
  z-index: 2;
  opacity: 0.9;
}

.notice {
  background: rgba(255,255,255,0.9);
  color: var(--text-dark);
  padding: 15px;
  border-radius: var(--radius-sm);
  margin: 20px auto;
  max-width: 800px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  font-size: 0.9rem;
  backdrop-filter: blur(5px);
}

.main-content {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  padding-bottom: 60px;
}

.article-card {
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-md);
  padding: 40px;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
}

.article-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 24px rgba(31, 38, 135, 0.25);
}

.article-card h2 {
  color: var(--primary-purple);
  margin-bottom: 20px;
  font-size: 1.8rem;
  position: relative;
  padding-bottom: 10px;
}

.article-card h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--primary-blue), var(--primary-purple));
}

.article-card h3 {
  color: var(--primary-blue);
  margin: 25px 0 15px;
  font-size: 1.4rem;
}

.article-card p {
  margin-bottom: 20px;
  font-size: 1.05rem;
}

.color-chip {
  display: inline-block;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  vertical-align: middle;
  margin-right: 5px;
  box-shadow: 0 0 0 1px rgba(0,0,0,0.1);
}

.code-block {
  background: rgba(30, 30, 30, 0.9);
  color: #f8f8f2;
  padding: 20px;
  border-radius: var(--radius-sm);
  margin: 20px 0;
  overflow-x: auto;
  font-family: 'Courier New', monospace;
  font-size: 0.9rem;
  line-height: 1.5;
  box-shadow: var(--shadow-sm);
}

.code-block code {
  display: block;
  white-space: pre;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 25px 0;
  background: rgba(255,255,255,0.7);
  backdrop-filter: blur(5px);
  border-radius: var(--radius-sm);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

th, td {
  padding: 12px 15px;
  text-align: left;
  border-bottom: 1px solid rgba(0,0,0,0.05);
}

th {
  background: linear-gradient(135deg, var(--primary-blue), var(--primary-purple));
  color: var(--white);
  font-weight: 500;
}

tr:hover {
  background-color: rgba(160, 196, 232, 0.1);
}

.image-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
  margin: 30px 0;
}

.gallery-image {
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
  aspect-ratio: 1/1;
}

.gallery-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition);
}

.gallery-image:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 24px rgba(31, 38, 135, 0.25);
}

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

.nav-tabs {
  display: flex;
  gap: 10px;
  margin-bottom: 30px;
  flex-wrap: wrap;
}

.nav-tab {
  padding: 10px 20px;
  background: rgba(255,255,255,0.7);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
  font-weight: 500;
  color: var(--primary-purple);
  backdrop-filter: blur(5px);
  box-shadow: var(--shadow-sm);
}

.nav-tab:hover {
  background: linear-gradient(135deg, var(--primary-blue), var(--primary-purple));
  color: var(--white);
}

.footer {
  background: linear-gradient(135deg, var(--primary-blue), var(--primary-purple));
  color: var(--white);
  padding: 30px 0;
  text-align: center;
  margin-top: 60px;
}

@media (max-width: 768px) {
  .header h1 {
    font-size: 2rem;
  }
  
  .article-card {
    padding: 25px;
  }
  
  .image-gallery {
    grid-template-columns: 1fr;
  }
}