@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@400;700&family=Roboto:wght@300;400;700&display=swap');
  
  :root {
    --primary: #0f0c29;
    --secondary: #302b63;
    --accent: #00ffff;
    --accent2: #39ff14;
    --text: #ffffff;
    --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: linear-gradient(135deg, var(--primary), var(--secondary), #24243e);
    color: var(--text);
    font-family: 'Roboto', sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100%;
  }
  
  .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
  }
  
  header {
    padding: 40px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
  }
  
  header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at center, rgba(48, 43, 99, 0.8) 0%, rgba(15, 12, 41, 0) 70%);
    z-index: -1;
  }
  
  h1, h2, h3, h4 {
    font-family: 'Montserrat', sans-serif;
    font-weight: 700;
    margin-bottom: 1.5rem;
    line-height: 1.2;
  }
  
  h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    letter-spacing: 2px;
    background: linear-gradient(90deg, var(--accent), var(--accent2));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    margin-bottom: 1rem;
    text-shadow: 0 0 10px rgba(0, 255, 255, 0.3);
  }
  
  h2 {
    font-size: clamp(1.8rem, 3vw, 2.5rem);
    color: var(--accent);
    position: relative;
    padding-bottom: 10px;
    margin-top: 3rem;
  }
  
  h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100px;
    height: 3px;
    background: linear-gradient(90deg, var(--accent), transparent);
  }
  
  h3 {
    font-size: clamp(1.5rem, 2.5vw, 2rem);
    color: var(--accent2);
    margin-top: 2.5rem;
  }
  
  p {
    font-size: clamp(1rem, 1.2vw, 1.2rem);
    margin-bottom: 1.5rem;
    color: rgba(255, 255, 255, 0.9);
  }
  
  .notice {
    background: rgba(0, 255, 255, 0.1);
    border-left: 4px solid var(--accent);
    padding: 20px;
    margin: 30px 0;
    border-radius: 0 8px 8px 0;
    position: relative;
    overflow: hidden;
  }
  
  .notice::before {
    content: '这是一个网页样式设计参考';
    position: absolute;
    top: 10px;
    right: 10px;
    font-size: 0.8rem;
    color: var(--accent);
    opacity: 0.7;
  }
  
  .card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 30px;
    margin: 40px 0;
  }
  
  .card {
    background: var(--card-bg);
    border-radius: 15px;
    padding: 25px;
    transition: var(--transition);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    position: relative;
    overflow: hidden;
  }
  
  .card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent, rgba(0, 255, 255, 0.1), transparent);
    transform: rotate(45deg);
    transition: var(--transition);
    opacity: 0;
  }
  
  .card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 255, 255, 0.2);
  }
  
  .card:hover::before {
    animation: shine 1.5s;
  }
  
  @keyframes shine {
    0% {
      opacity: 0;
      left: -50%;
    }
    50% {
      opacity: 0.5;
    }
    100% {
      opacity: 0;
      left: 150%;
    }
  }
  
  .card img {
    width: 100%;
    height: auto;
    border-radius: 10px;
    margin-bottom: 20px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
    transition: var(--transition);
  }
  
  .card:hover img {
    transform: scale(1.03);
  }
  
  .card h4 {
    color: var(--accent);
    margin-bottom: 15px;
    font-size: 1.3rem;
  }
  
  .card p {
    margin-bottom: 15px;
    font-size: 0.95rem;
  }
  
  .tag {
    display: inline-block;
    padding: 3px 10px;
    background: rgba(57, 255, 20, 0.2);
    color: var(--accent2);
    border-radius: 20px;
    font-size: 0.8rem;
    margin-right: 5px;
    margin-bottom: 5px;
  }
  
  pre {
    background: rgba(0, 0, 0, 0.3);
    border-radius: 8px;
    padding: 20px;
    margin: 25px 0;
    overflow: auto;
    border-left: 4px solid var(--accent);
    position: relative;
  }
  
  pre::before {
    content: 'CSS';
    position: absolute;
    top: 0;
    right: 0;
    background: var(--accent);
    color: var(--primary);
    padding: 2px 10px;
    font-size: 0.8rem;
    border-radius: 0 0 0 5px;
  }
  
  code {
    font-family: 'Roboto Mono', monospace;
    font-size: 0.9rem;
    color: var(--accent2);
  }
  
  table {
    width: 100%;
    border-collapse: collapse;
    margin: 30px 0;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 8px;
    overflow: hidden;
  }
  
  th, td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }
  
  th {
    background: rgba(36, 36, 62, 0.7);
    color: var(--accent);
    font-weight: 700;
  }
  
  tr:hover {
    background: rgba(0, 255, 255, 0.05);
  }
  
  .nav-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 15px;
    margin: 40px 0;
  }
  
  .nav-link {
    padding: 10px 20px;
    background: transparent;
    border: 2px solid var(--accent);
    color: var(--accent);
    border-radius: 30px;
    text-decoration: none;
    font-weight: 700;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
  }
  
  .nav-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(0, 255, 255, 0.2), transparent);
    transition: 0.5s;
  }
  
  .nav-link:hover {
    background: var(--accent);
    color: var(--primary);
    box-shadow: 0 0 15px var(--accent);
  }
  
  .nav-link:hover::before {
    left: 100%;
  }
  
  footer {
    text-align: center;
    padding: 40px 0;
    margin-top: 60px;
    background: rgba(15, 12, 41, 0.5);
    position: relative;
  }
  
  footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
  }
  
  @media (max-width: 768px) {
    .card-grid {
      grid-template-columns: 1fr;
    }
    
    pre {
      padding: 15px;
    }
    
    th, td {
      padding: 10px;
    }
  }
  
  /* Animations */
  @keyframes float {
    0%, 100% {
      transform: translateY(0);
    }
    50% {
      transform: translateY(-10px);
    }
  }
  
  .floating {
    animation: float 3s ease-in-out infinite;
  }
  
  .pulse {
    animation: pulse 2s infinite;
  }
  
  @keyframes pulse {
    0% {
      box-shadow: 0 0 0 0 rgba(0, 255, 255, 0.4);
    }
    70% {
      box-shadow: 0 0 0 15px rgba(0, 255, 255, 0);
    }
    100% {
      box-shadow: 0 0 0 0 rgba(0, 255, 255, 0);
    }
  }