body {
    margin: 0;
    font-family: 'Orbitron', sans-serif;
    background-color: #000;
    color: #fff;
  }
  
  .glow {
    animation: neon-glow 1.5s ease-in-out infinite alternate;
  }
  
  @keyframes neon-glow {
    from {
      text-shadow: 0 0 5px #0ff, 0 0 10px #0ff, 0 0 20px #f0f;
    }
    to {
      text-shadow: 0 0 20px #0ff, 0 0 30px #f0f, 0 0 40px #0ff;
    }
  }
  
  .glitch {
    position: relative;
    color: #0ff;
    animation: glitchText 1s infinite;
  }
  
  @keyframes glitchText {
    0% { text-shadow: 2px 0 #f0f, -2px 0 #0ff; }
    20% { text-shadow: -2px 0 #f0f, 2px 0 #0ff; }
    40% { text-shadow: 2px 2px #f0f, -2px -2px #0ff; }
    60% { text-shadow: -1px 2px #0ff, 1px -2px #f0f; }
    80% { text-shadow: 1px 1px #0ff, -1px -1px #f0f; }
    100% { text-shadow: 2px 0 #f0f, -2px 0 #0ff; }
  }
  
  
  @keyframes glitch {
    0% {
      text-shadow: 2px 0 #0ff, -2px 0 #f0f;
    }
    50% {
      text-shadow: -2px 0 #0ff, 2px 0 #f0f;
    }
    100% {
      text-shadow: 2px 0 #0ff, -2px 0 #f0f;
    }
  }
  
  .neon-header {
    background: #0ff;
    background: linear-gradient(to right, #0ff, #f0f);
    -webkit-background-clip: text;
    color: transparent;
    text-align: center;
    padding: 2rem 1rem;
  }
  
  .neon-header h1 {
    font-size: 3rem;
  }
  
  nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
    gap: 2rem;
    padding: 0;
  }
  
  nav a {
    color: #0ff;
    text-decoration: none;
    text-shadow: 0 0 5px #0ff;
    transition: color 0.3s;
  }
  
  nav a:hover {
    color: #f0f;
    text-shadow: 0 0 8px #f0f;
  }
  
  .hero {
    position: relative;
    height: 80vh;
    background: url('https://images.unsplash.com/photo-1617727553252-14ee66459b04?auto=format&fit=crop&w=1950&q=80') center/cover no-repeat;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  
  .hero .overlay {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0, 0, 0, 0.7);
  }
  
  .hero-content {
    position: relative;
    text-align: center;
    z-index: 2;
  }
  
  .hero-content h2 {
    font-size: 2.5rem;
    color: #0ff;
  }
  
  .hero-content p {
    font-size: 1.2rem;
    margin-bottom: 1.5rem;
  }
  
  .neon-button {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border: 2px solid #0ff;
    color: #0ff;
    background: transparent;
    text-transform: uppercase;
    font-weight: bold;
    text-decoration: none;
    transition: all 0.3s;
    box-shadow: 0 0 8px #0ff;
  }
  
  .neon-button:hover {
    background: #0ff;
    color: #000;
    box-shadow: 0 0 16px #f0f;
  }
  
  .section {
    padding: 4rem 2rem;
    text-align: center;
  }
  
  .section h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: #f0f;
    text-shadow: 0 0 8px #f0f;
  }
  
  .menu-list {
    list-style: none;
    max-width: 500px;
    margin: 0 auto;
    padding: 0;
  }
  
  .menu-list li {
    display: flex;
    justify-content: space-between;
    margin: 1rem 0;
    font-size: 1.2rem;
    border-bottom: 1px solid #333;
    padding-bottom: 0.5rem;
  }
  
  .menu-images {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 2rem;
    flex-wrap: wrap;
  }
  
  .menu-images img {
    width: 200px;
    height: 200px;
    object-fit: cover;
    border: 2px solid #0ff;
    box-shadow: 0 0 15px #f0f;
    transition: transform 0.3s, box-shadow 0.3s;
  }
  
  .menu-images img:hover {
    transform: scale(1.05);
    box-shadow: 0 0 30px #0ff, 0 0 40px #f0f;
  }
  
  .footer {
    text-align: center;
    padding: 2rem;
    background-color: #111;
    font-size: 0.9rem;
    color: #888;
  }

  #particles-js {
    position: fixed;
    top: 0; left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background-color: #000;
  }

  .lightning-flash {
    position: fixed;
    top: 0; left: 0;
    width: 100%;
    height: 100%;
    background: white;
    opacity: 0;
    pointer-events: none;
    z-index: 100;
    animation: none;
  }
  
  @keyframes flash {
    0% { opacity: 0; }
    10% { opacity: 0.9; }
    100% { opacity: 0; }
  }
  
  .hero {
    background-image: url('back.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    color: #0ff;
    text-align: center;
    z-index: 1;
  }
  
  .hero::before {
    content: "";
    position: absolute;
    top: 0; left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5); /* 黒の透過フィルタで文字の視認性UP */
    z-index: -1;
  }
  
  .hero-content {
    z-index: 2;
  }
  
  .hero-title {
    font-size: 4rem;
    font-weight: bold;
    color: #0ff;
    text-shadow: 0 0 10px #0ff, 0 0 20px #f0f;
    animation: neonGlow 1.5s ease-in-out infinite alternate;
  }
  
  @keyframes neonGlow {
    from {
      text-shadow: 0 0 5px #0ff, 0 0 10px #0ff, 0 0 20px #f0f;
      opacity: 1;
    }
    to {
      text-shadow: 0 0 2px #0ff, 0 0 5px #f0f;
      opacity: 0.7;
    }
  }
  
  
  .hero-subtitle {
    font-size: 1.5rem;
    text-shadow: 0 0 8px #0ff;
  }
  
  .cyber-lines {
    position: absolute;
    width: 100%;
    height: 100%;
    background: repeating-linear-gradient(
      90deg,
      transparent,
      transparent 49%,
      rgba(0, 255, 255, 0.1) 50%,
      transparent 51%,
      transparent 100%
    );
    background-size: 200px 100%;
    animation: scanLine 5s linear infinite;
    z-index: 0;
  }
  
  @keyframes scanLine {
    from { background-position: 0 0; }
    to { background-position: 200px 0; }
  }
  
  .crt {
    position: relative;
    overflow: hidden;
  }
  
  .crt::before {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: repeating-linear-gradient(
      to bottom,
      rgba(0, 255, 255, 0.05),
      rgba(0, 255, 255, 0.05) 1px,
      transparent 1px,
      transparent 2px
    );
    z-index: 10;
    pointer-events: none;
    animation: flicker 0.15s infinite;
  }
  
  @keyframes flicker {
    0%, 19%, 21%, 23%, 25%, 54%, 56%, 100% {
      opacity: 1;
    }
    20%, 22%, 24%, 55% {
      opacity: 0.85;
    }
  }