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

      :root {
        --bg-primary: #f7fafb;
        --bg-secondary: #ffffff;
        --accent-digital: #1B80CF;
        --accent-process: #0d6eaf;
        --accent-light: #5ca4db;
        --accent-transform: #00b4d8;
        --text-primary: #1a2332;
        --text-secondary: #4a5568;
        --shadow-digital: rgba(27, 128, 207, 0.15);
        --shadow-process: rgba(13, 110, 175, 0.2);
      }

      body {
        font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
        background: linear-gradient(135deg, var(--bg-primary) 0%, #e3f5fc 100%);
        color: var(--text-primary);
        line-height: 1.7;
        min-height: 100vh;
      }

      /* Navigation */
      nav {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        background: rgba(255, 255, 255, 0.94);
        -webkit-backdrop-filter: blur(12px);
        backdrop-filter: blur(12px);
        padding: 1rem 2rem;
        box-shadow: 0 2px 20px var(--shadow-digital);
        z-index: 1000;
        border-bottom: 1px solid rgba(27, 128, 207, 0.1);
      }

      .nav-content {
        max-width: 1400px;
        margin: 0 auto;
        display: flex;
        justify-content: space-between;
        align-items: center;
        flex-wrap: wrap;
        gap: 1rem;
      }

      .nav-title {
        font-size: 1.1rem;
        font-weight: 600;
        color: var(--accent-digital);
        text-decoration: none;
        letter-spacing: -0.01em;
      }

      .nav-links {
        display: flex;
        gap: 2rem;
        list-style: none;
      }

      .nav-links a {
        color: var(--text-secondary);
        text-decoration: none;
        font-size: 0.95rem;
        font-weight: 500;
        transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        padding: 0.4rem 0.8rem;
        border-radius: 6px;
        position: relative;
        z-index: 1;
      }

      .nav-links a:hover {
        color: var(--accent-digital);
        background: rgba(27, 128, 207, 0.08);
      }

      /* Hero Section */
      .hero {
        max-width: 1400px;
        margin: 0 auto;
        padding: 140px 2rem 80px;
        display: grid;
        grid-template-columns: 1fr 430px;
        gap: 4rem;
        align-items: center;
      }

      .hero-content h1 {
        font-size: 4.2rem;
        font-weight: 800;
        color: var(--text-primary);
        line-height: 1.1;
        letter-spacing: -0.03em;
        margin-bottom: 1.5rem;
        background: linear-gradient(135deg, var(--accent-process) 0%, var(--accent-digital) 100%);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
      }

      .hero-content .subtitle {
        font-size: 1.5rem;
        color: var(--text-secondary);
        margin-bottom: 1rem;
        font-weight: 500;
      }

      .hero-content .year {
        font-size: 1.2rem;
        color: var(--accent-digital);
        font-weight: 600;
        margin-bottom: 2rem;
      }

      .hero-description {
        font-size: 1.15rem;
        color: var(--text-secondary);
        line-height: 1.8;
        padding: 2rem;
        background: rgba(255, 255, 255, 0.8);
        border-radius: 16px;
        border: 1px solid rgba(27, 128, 207, 0.12);
        box-shadow: 0 4px 20px var(--shadow-digital);
      }

      /* Digital Process SVG */
      .hero-visual {
        position: relative;
      }

      .digitization-svg {
        width: 100%;
        height: auto;
        filter: drop-shadow(0 10px 30px var(--shadow-digital));
      }

      /* Content Container */
      .content-wrapper {
        max-width: 1400px;
        margin: 0 auto;
        padding: 4rem 2rem;
      }

      /* Section Styling */
      .section {
        margin-bottom: 5rem;
      }

      .section-header {
        display: flex;
        align-items: center;
        gap: 1rem;
        margin-bottom: 3rem;
      }

      .section-icon {
        width: 50px;
        height: 50px;
        background: linear-gradient(135deg, var(--accent-digital), var(--accent-transform));
        border-radius: 12px;
        display: flex;
        align-items: center;
        justify-content: center;
        animation: iconPulse 3s ease-in-out infinite;
      }

      @keyframes iconPulse {

        0%,
        100% {
          transform: scale(1);
          box-shadow: 0 4px 15px var(--shadow-digital);
        }

        50% {
          transform: scale(1.08);
          box-shadow: 0 6px 25px var(--shadow-process);
        }
      }

      .section h2 {
        font-size: 2.5rem;
        font-weight: 700;
        color: var(--text-primary);
        letter-spacing: -0.02em;
      }

      /* Bento Grid Layout */
      .bento-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
        gap: 2rem;
        margin-bottom: 2rem;
      }

      .bento-grid.featured {
        grid-template-columns: repeat(2, 1fr);
      }

      .card {
        background: var(--bg-secondary);
        border-radius: 20px;
        padding: 2.5rem;
        border: 2px solid rgba(27, 128, 207, 0.1);
        transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        position: relative;
        overflow: hidden;
      }

      .card::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background:
          linear-gradient(135deg, rgba(27, 128, 207, 0.04) 0%, transparent 50%),
          radial-gradient(circle at 80% 20%, rgba(0, 180, 216, 0.04) 0%, transparent 50%);
        opacity: 0;
        transition: opacity 0.4s ease;
        pointer-events: none;
        z-index: 0;
      }

      .card:hover::before {
        opacity: 1;
      }

      .card:hover {
        transform: translateY(-12px) scale(1.02);
        border-color: var(--accent-digital);
        box-shadow:
          0 20px 40px var(--shadow-digital),
          0 10px 20px var(--shadow-process);
      }

      .card.featured {
        grid-column: span 1;
      }

      .card.span-2 {
        grid-column: span 2;
        background: linear-gradient(135deg, rgba(27, 128, 207, 0.05) 0%, rgba(255, 255, 255, 0.9) 100%);
      }

      .card-icon {
        width: 96px;
        height: 96px;
        background: linear-gradient(135deg, var(--accent-light), var(--accent-digital));
        border-radius: 46% 54% 50% 50%;
        margin-bottom: 1.5rem;
        display: flex;
        align-items: center;
        justify-content: center;
        animation: morphDigital 6s ease-in-out infinite;
        transition: all 0.4s ease;
        position: relative;
        z-index: 1;
      }

      .card:hover .card-icon {
        transform: scale(1.15) rotate(12deg);
        border-radius: 54% 46% 50% 50%;
      }

      @keyframes morphDigital {

        0%,
        100% {
          border-radius: 46% 54% 50% 50%;
        }

        25% {
          border-radius: 50% 46% 54% 50%;
        }

        50% {
          border-radius: 54% 50% 46% 54%;
        }

        75% {
          border-radius: 50% 54% 50% 46%;
        }
      }

      .card-badge {
        display: inline-block;
        padding: 0.4rem 1rem;
        background: rgba(27, 128, 207, 0.12);
        color: var(--accent-process);
        border-radius: 20px;
        font-size: 0.85rem;
        font-weight: 600;
        margin-bottom: 1rem;
        letter-spacing: 0.02em;
        position: relative;
        z-index: 1;
      }

      .card h3 {
        font-size: 1.6rem;
        font-weight: 700;
        color: var(--text-primary);
        margin-bottom: 0.8rem;
        letter-spacing: -0.01em;
        position: relative;
        z-index: 1;
      }

      .card p {
        font-size: 1.05rem;
        color: var(--text-secondary);
        line-height: 1.7;
        margin-bottom: 1.5rem;
        position: relative;
        z-index: 1;
      }

      .card a {
        color: var(--accent-digital);
        text-decoration: none;
        font-weight: 600;
        display: inline-flex;
        align-items: center;
        gap: 0.5rem;
        transition: all 0.3s ease;
        position: relative;
        z-index: 1;
      }

      .card a:hover {
        color: var(--accent-process);
        gap: 0.8rem;
      }

      .card a::after {
        content: '→';
        font-size: 1.2rem;
        transition: transform 0.3s ease;
      }

      .card a:hover::after {
        transform: translateX(4px);
      }

      /* GitHub Link Special Styling */
      .github-card {
        background: linear-gradient(135deg, #f6f8fa 0%, #ffffff 100%);
        border: 2px solid rgba(27, 128, 207, 0.15);
      }

      /* Demonstration Section */
      .demo-section {
        background: rgba(255, 255, 255, 0.6);
        border-radius: 24px;
        padding: 2.5rem;
        border: 2px solid rgba(27, 128, 207, 0.08);
      }

      .demo-frame-wrapper {
        margin-top: 1.5rem;
        border-radius: 16px;
        overflow: hidden;
        border: 1px solid rgba(27, 128, 207, 0.14);
        box-shadow: 0 10px 28px var(--shadow-digital);
        background: #ffffff;
      }

      .demo-frame {
        width: 100%;
        height: 780px;
        border: 0;
        display: block;
        background: #ffffff;
      }

      /* Footer */
      footer {
        background: rgba(255, 255, 255, 0.8);
        -webkit-backdrop-filter: blur(12px);
        backdrop-filter: blur(12px);
        padding: 3rem 2rem;
        margin-top: 6rem;
        border-top: 2px solid rgba(27, 128, 207, 0.1);
      }

      .footer-content {
        max-width: 1400px;
        margin: 0 auto;
        display: flex;
        justify-content: space-between;
        align-items: center;
        flex-wrap: wrap;
        gap: 2rem;
      }

      .footer-links {
        display: flex;
        gap: 2rem;
      }

      .footer-links a {
        color: var(--text-secondary);
        text-decoration: none;
        font-weight: 500;
        transition: all 0.3s ease;
        padding: 0.5rem 1rem;
        border-radius: 8px;
        position: relative;
        z-index: 1;
      }

      .footer-links a:hover {
        color: var(--accent-digital);
        background: rgba(27, 128, 207, 0.08);
      }

      .copyright {
        color: var(--text-secondary);
        font-size: 0.95rem;
      }

      /* Responsive Design */
      @media (max-width: 1200px) {
        .hero {
          grid-template-columns: 1fr;
          gap: 3rem;
        }

        .hero-visual {
          max-width: 430px;
          margin: 0 auto;
        }

        .bento-grid.featured {
          grid-template-columns: 1fr;
        }

        .card.span-2 {
          grid-column: span 1;
        }
      }

      @media (max-width: 768px) {
        .hero-content h1 {
          font-size: 2.5rem;
        }

        .hero-content .subtitle {
          font-size: 1.2rem;
        }

        .section h2 {
          font-size: 1.8rem;
        }

        .bento-grid,
        .bento-grid.featured {
          grid-template-columns: 1fr;
        }

        .card.span-2 {
          grid-column: span 1;
        }

        .nav-content {
          flex-direction: column;
          align-items: flex-start;
        }

        .nav-links {
          flex-wrap: wrap;
          gap: 1rem;
        }

        .demo-section {
          padding: 1.5rem;
        }

        .demo-frame {
          height: 620px;
        }

        .footer-content {
          flex-direction: column;
          text-align: center;
        }
      }