:root {
  --primary: #1e3c72;
  --secondary: #2a5298;
  --accent: #ff7e5f;
  --text: #ffffff;
  --bg-gradient: linear-gradient(135deg, var(--primary), var(--secondary));
  --card-bg: rgba(255, 255, 255, 0.1);
  --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

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

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

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

.header {
  text-align: center;
  padding: 80px 0 40px;
  position: relative;
}

.header::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 150px;
  height: 3px;
  background: var(--accent);
  border-radius: 3px;
}

h1, h2, h3, h4 {
  font-weight: 700;
  margin-bottom: 20px;
  line-height: 1.3;
}

h1 {
  font-size: 2.5rem;
  background: linear-gradient(90deg, #fff, #feb47b);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

h2 {
  font-size: 2rem;
  margin-top: 50px;
  padding-bottom: 15px;
  border-bottom: 1px solid rgba(255,255,255,0.2);
  position: relative;
}

h2::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100px;
  height: 3px;
  background: var(--accent);
}

h3 {
  font-size: 1.5rem;
  margin-top: 30px;
  color: #feb47b;
}

p {
  margin-bottom: 20px;
  font-size: 1.1rem;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: #fff;
  text-decoration: underline;
}

.card {
  background: var(--card-bg);
  border-radius: 10px;
  padding: 30px;
  margin: 30px 0;
  box-shadow: 0 10px 30px rgba(0,0,0,0.2);
  transition: var(--transition);
  backdrop-filter: blur(5px);
  border: 1px solid rgba(255,255,255,0.1);
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 35px rgba(0,0,0,0.3);
}

.img-container {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  margin: 30px 0;
  justify-content: center;
}

.img-wrapper {
  width: 300px;
  height: 300px;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 5px 15px rgba(0,0,0,0.2);
  transition: var(--transition);
  position: relative;
}

.img-wrapper:hover {
  transform: scale(1.05);
  box-shadow: 0 10px 25px rgba(0,0,0,0.3);
}

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

.img-wrapper:hover img {
  transform: scale(1.1);
}

.code-container {
  background: rgba(0,0,0,0.3);
  border-radius: 8px;
  padding: 20px;
  margin: 25px 0;
  overflow: auto;
  border-left: 4px solid var(--accent);
}

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

code {
  font-family: 'Courier New', monospace;
  color: #f8f8f2;
}

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: rgba(30, 60, 114, 0.9);
  padding: 15px 0;
  z-index: 1000;
  backdrop-filter: blur(10px);
  box-shadow: 0 2px 10px 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-links {
  display: flex;
  gap: 30px;
}

.nav-links a {
  color: white;
  font-weight: 500;
  position: relative;
  padding: 5px 0;
}

.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%;
}

.banner {
  padding: 120px 0 80px;
  text-align: center;
  position: relative;
}

.banner::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at center, rgba(255,126,95,0.1) 0%, transparent 70%);
  z-index: -1;
}

.banner h1 {
  font-size: 3rem;
  margin-bottom: 20px;
  animation: fadeInUp 1s ease;
}

.banner p {
  max-width: 800px;
  margin: 0 auto 30px;
  font-size: 1.2rem;
  opacity: 0;
  animation: fadeInUp 1s ease 0.3s forwards;
}

.notice {
  background: rgba(255,255,255,0.1);
  padding: 15px;
  border-radius: 8px;
  margin: 30px 0;
  border-left: 4px solid var(--accent);
  font-size: 0.9rem;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

@media (max-width: 768px) {
  .nav-links {
    gap: 15px;
  }
  
  h1 {
    font-size: 2rem;
  }
  
  h2 {
    font-size: 1.5rem;
  }
  
  .img-wrapper {
    width: 100%;
    max-width: 300px;
  }
}

@media (max-width: 480px) {
  .nav-container {
    flex-direction: column;
    gap: 10px;
  }
  
  .nav-links {
    flex-wrap: wrap;
    justify-content: center;
  }
  
  .banner h1 {
    font-size: 1.8rem;
  }
}