:root {
  --primary-color: #1E90FF;
  --accent-color-orange: #FFA500;
  --accent-color-green: #32CD32;
  --background-color: #f5f5f5;
  --text-color: #333333;
  --card-bg: #ffffff;
  --shadow: 0 10px 30px rgba(0,0,0,0.1);
  --border-radius: 12px;
}

body {
  font-family: 'Roboto', sans-serif;
  background: linear-gradient(135deg, #f5f7fa 0%, #e4e8f0 100%);
  color: var(--text-color);
  line-height: 1.6;
  margin: 0;
  padding: 0;
  min-height: 100%;
}

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

.header {
  text-align: center;
  margin-bottom: 3rem;
  position: relative;
}

.header h1 {
  font-size: 2.8rem;
  background: linear-gradient(90deg, var(--primary-color), var(--accent-color-green));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 1rem;
  position: relative;
  display: inline-block;
}

.header h1::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-color), var(--accent-color-orange));
  border-radius: 2px;
}

.notice {
  background: rgba(30, 144, 255, 0.1);
  padding: 1rem;
  border-radius: var(--border-radius);
  border-left: 4px solid var(--primary-color);
  margin-bottom: 2rem;
  font-size: 0.9rem;
}

.section {
  background: var(--card-bg);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  padding: 2rem;
  margin-bottom: 3rem;
  transition: transform 0.3s ease;
}

.section:hover {
  transform: translateY(-5px);
}

.section h2 {
  color: var(--primary-color);
  font-size: 1.8rem;
  margin-top: 0;
  position: relative;
  padding-bottom: 0.5rem;
}

.section h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--primary-color), var(--accent-color-orange));
  border-radius: 3px;
}

.section h3 {
  color: var(--primary-color);
  font-size: 1.4rem;
  margin: 1.5rem 0 1rem;
}

.img-container {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin: 1.5rem 0;
}

.img-container img {
  width: 150px;
  height: 150px;
  object-fit: cover;
  border-radius: var(--border-radius);
  box-shadow: 0 5px 15px rgba(0,0,0,0.1);
  transition: all 0.3s ease;
}

.img-container img:hover {
  transform: scale(1.05);
  box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

pre {
  background: #282c34;
  color: #abb2bf;
  padding: 1.5rem;
  border-radius: var(--border-radius);
  overflow-x: auto;
  margin: 1.5rem 0;
  font-size: 0.9rem;
  line-height: 1.5;
  position: relative;
}

pre::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(to bottom, var(--primary-color), var(--accent-color-green));
  border-radius: var(--border-radius) 0 0 var(--border-radius);
}

code {
  font-family: 'Fira Code', monospace;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  background: var(--card-bg);
  box-shadow: var(--shadow);
  border-radius: var(--border-radius);
  overflow: hidden;
}

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

th {
  background: rgba(30, 144, 255, 0.1);
  color: var(--primary-color);
  font-weight: 600;
}

tr:hover {
  background: rgba(30, 144, 255, 0.03);
}

.nav-tabs {
  display: flex;
  margin-bottom: 2rem;
  border-bottom: 1px solid rgba(0,0,0,0.1);
}

.nav-tabs a {
  padding: 0.75rem 1.5rem;
  margin-right: 0.5rem;
  background: transparent;
  color: var(--text-color);
  text-decoration: none;
  border-radius: var(--border-radius) var(--border-radius) 0 0;
  transition: all 0.3s ease;
  position: relative;
}

.nav-tabs a:hover {
  color: var(--primary-color);
}

.nav-tabs a.active {
  color: var(--primary-color);
  background: rgba(30, 144, 255, 0.1);
}

.nav-tabs a.active::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--primary-color);
}

@media (max-width: 768px) {
  .container {
    padding: 1rem;
  }
  
  .header h1 {
    font-size: 2rem;
  }
  
  .section {
    padding: 1.5rem;
  }
  
  .img-container img {
    width: 100px;
    height: 100px;
  }
}

@keyframes float {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

.decorative-element {
  position: absolute;
  width: 100px;
  height: 100px;
  background: linear-gradient(135deg, rgba(30, 144, 255, 0.1), rgba(50, 205, 50, 0.1));
  border-radius: 50%;
  filter: blur(30px);
  z-index: -1;
  animation: float 6s ease-in-out infinite;
}

.decorative-element:nth-child(1) {
  top: 10%;
  left: 5%;
}

.decorative-element:nth-child(2) {
  bottom: 15%;
  right: 5%;
  animation-delay: 1s;
}

.decorative-element:nth-child(3) {
  top: 40%;
  right: 15%;
  animation-delay: 2s;
}