:root {
      --color-primary: #005A99;
      --color-primary-dark: #00003B;
      --color-secondary: #0092DA;
      --color-accent: #FABE00;
      --color-accent-dark: #C07C00;
      --color-light-bg: #f8f9fa;
      --color-border: #dcdcdc;
      --color-text-light: #535D64;
      --color-text-dark: #222222;
    }

    .hero {
      background: linear-gradient(135deg, #e8f3f8 0%, #d4e9f5 100%);
      background-image: url('./img/hero_bg.webp');
      background-size: cover;
      background-position: center;
      background-attachment: fixed;
      padding: 6rem 1.5rem;
      text-align: center;
      position: relative;
      overflow: hidden;
      min-height: 500px;
      display: flex;
      align-items: center;
      justify-content: center;
      border-bottom: none;
    }

    .hero::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background: linear-gradient(135deg, rgba(232, 243, 248, 0.6) 0%, rgba(212, 233, 245, 0.6) 100%);
      pointer-events: none;
      z-index: 1;
    }

    .hero::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      right: 0;
      height: 80px;
      background: linear-gradient(to bottom, transparent, rgba(255,255,255,0.4));
      z-index: 1;
    }

    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 700px;
      margin: 0 auto;
    }

    .logo {
      font-size: 0.75rem;
      color: var(--color-accent);
      font-weight: 700;
      letter-spacing: 3px;
      margin-bottom: 1.5rem;
      text-transform: uppercase;
    }

    h1 {
      font-size: 2.5rem;
      font-weight: 700;
      color: var(--color-primary);
      margin-bottom: 1rem;
      line-height: 1.2;
      letter-spacing: -0.5px;
    }

    .subtitle {
      font-size: 1.1rem;
      color: var(--color-text-light);
      margin-bottom: 2rem;
      font-weight: 500;
    }

    .badge {
      display: inline-block;
      background: linear-gradient(135deg, #FABE00, #C07C00);
      color: white;
      padding: 0.75rem 1.5rem;
      border-radius: 30px;
      font-size: 0.9rem;
      font-weight: 600;
      margin-top: 1rem;
      box-shadow: 0 4px 15px rgba(250, 190, 0, 0.25);
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }

    section {
      padding: 4rem 1.5rem;
      max-width: 1200px;
      margin: 0 auto;
    }

    .section-title {
      font-size: 2rem;
      font-weight: 700;
      color: var(--color-primary);
      margin-bottom: 3rem;
      text-align: center;
      position: relative;
      padding-bottom: 1.5rem;
      letter-spacing: -0.3px;
    }

    .section-title::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 50%;
      transform: translateX(-50%);
      width: 60px;
      height: 3px;
      background: linear-gradient(90deg, var(--color-secondary), var(--color-accent));
      border-radius: 2px;
    }

    .intro-grid {
      display: grid;
      grid-template-columns: 1fr;
      gap: 2rem;
      margin-bottom: 2rem;
    }

    .intro-card {
      background: white;
      padding: 3rem;
      border-radius: 16px;
      border: 1px solid var(--color-border);
      box-shadow: 0 10px 40px rgba(10, 61, 98, 0.08);
      position: relative;
      overflow: hidden;
      transition: all 0.4s ease;
    }

    .intro-card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 4px;
      background: linear-gradient(90deg, var(--color-accent), var(--color-secondary));
    }

    .intro-card:hover {
      box-shadow: 0 20px 60px rgba(10, 61, 98, 0.12);
      transform: translateY(-4px);
    }

    .intro-card h3 {
      font-size: 1.5rem;
      color: var(--color-primary);
      margin-bottom: 1.5rem;
      font-weight: 700;
    }

    .intro-card p {
      color: var(--color-text-light);
      line-height: 1.9;
    }

    .features-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
      gap: 2rem;
      margin: 2rem 0;
    }

    .feature-box {
      background: white;
      border: 1px solid var(--color-border);
      padding: 2.5rem 2rem;
      border-radius: 12px;
      text-align: center;
      transition: all 0.4s ease;
      position: relative;
      overflow: hidden;
      box-shadow: 0 4px 16px rgba(10, 61, 98, 0.05);
    }

    .feature-box::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 4px;
      background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
    }

    .feature-box:nth-child(2)::before {
      background: linear-gradient(90deg, var(--color-secondary), var(--color-accent));
    }

    .feature-box:nth-child(3)::before {
      background: linear-gradient(90deg, var(--color-accent), var(--color-primary));
    }

    .feature-box:hover {
      box-shadow: 0 12px 32px rgba(10, 61, 98, 0.12);
      transform: translateY(-6px);
      border-color: var(--color-accent);
    }

    .feature-icon {
      display: none;
    }

    .feature-image-box {
      width: 80px;
      height: 80px;
      background: linear-gradient(135deg, #f5f9fc 0%, #eef5fb 100%);
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 1.5rem;
      border: 1.5px solid var(--color-border);
    }

    .feature-image {
      width: 100%;
      height: 100%;
      object-fit: contain;
      padding: 12px;
      border-radius: 10px;
    }

    .feature-box h4 {
      font-size: 1.1rem;
      font-weight: 700;
      color: var(--color-primary);
      margin-bottom: 1rem;
    }

    .feature-box p {
      font-size: 0.95rem;
      color: var(--color-text-light);
      line-height: 1.7;
    }

    .case-container {
      margin: 3rem 0;
    }

    .case {
      background: white;
      border: 1px solid var(--color-border);
      border-radius: 16px;
      padding: 3rem;
      margin-bottom: 3rem;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 3rem;
      align-items: center;
      box-shadow: 0 8px 32px rgba(10, 61, 98, 0.08);
      position: relative;
      overflow: hidden;
      transition: all 0.4s ease;
    }

    .case::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 5px;
      background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
    }

    .case:nth-child(1)::before {
      background: linear-gradient(90deg, #005A99, #0092DA);
    }

    .case:nth-child(2)::before {
      background: linear-gradient(90deg, #FABE00, #C07C00);
    }

    .case:nth-child(3)::before {
      background: linear-gradient(90deg, #00003B, #005A99);
    }

    .case:hover {
      box-shadow: 0 16px 48px rgba(10, 61, 98, 0.12);
      transform: translateY(-4px);
    }

    .case:nth-child(even) .case-content {
      order: 2;
    }

    .case:nth-child(even) .case-image {
      order: 1;
    }

    .case-label {
      display: inline-block;
      color: white;
      padding: 0.6rem 1.2rem;
      border-radius: 25px;
      font-size: 0.85rem;
      font-weight: 700;
      margin-bottom: 1.5rem;
      text-transform: uppercase;
      letter-spacing: 1px;
      box-shadow: 0 4px 12px rgba(10, 61, 98, 0.2);
    }

    .case:nth-child(1) .case-label {
      background: #005A99;
    }

    .case:nth-child(2) .case-label {
      background: #FABE00;
      color: #222222;
    }

    .case:nth-child(3) .case-label {
      background: #00003B;
    }

    .case h3 {
      font-size: 1.5rem;
      font-weight: 700;
      color: var(--color-primary);
      margin-bottom: 1.5rem;
      line-height: 1.3;
    }

    .case p {
      color: var(--color-text-light);
      line-height: 1.9;
      margin-bottom: 1.5rem;
      font-size: 0.95rem;
    }

    .case-image {
      background: linear-gradient(135deg, #f5f9fc 0%, #eef5fb 100%);
      border-radius: 12px;
      text-align: center;
      color: #999;
      font-size: 0.9rem;
      min-height: 300px;
      display: flex;
      align-items: center;
      justify-content: center;
      overflow: hidden;
      border: 1px solid var(--color-border);
      box-shadow: inset 0 2px 8px rgba(10, 61, 98, 0.04);
    }

    .case-image img {
      width: 100%;
      height: auto;
      border-radius: 8px;
      object-fit: cover;
      transition: transform 0.4s ease;
    }

    .case:hover .case-image img {
      transform: scale(1.02);
    }

    .product-showcase {
      background: linear-gradient(135deg, #f5f9fc 0%, #eef5fb 100%);
      padding: 4rem 2rem;
      border-radius: 16px;
      text-align: center;
      margin: 3rem 0;
      border: 2px solid var(--color-border);
      box-shadow: 0 8px 32px rgba(10, 61, 98, 0.08);
    }

    .product-showcase > div {
      background: white;
      padding: 3rem;
      border-radius: 12px;
      display: inline-block;
      border: 1px solid var(--color-border);
      box-shadow: 0 4px 16px rgba(10, 61, 98, 0.05);
    }

    .product-details {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
      gap: 1.5rem;
      margin-top: 2rem;
    }

    .detail-item {
      background: linear-gradient(135deg, #f5f9fc 0%, #eef5fb 100%);
      padding: 1.5rem;
      border-radius: 12px;
      font-size: 0.95rem;
      color: var(--color-text-light);
      border: 1px solid var(--color-border);
    }

    .detail-item strong {
      display: block;
      color: var(--color-primary);
      font-size: 1.1rem;
      margin-bottom: 0.5rem;
      font-weight: 700;
    }

    .cta-button {
      display: inline-block;
      background: linear-gradient(135deg, #EB6E00, #FABE00);
      color: white;
      padding: 1.2rem 3rem;
      border-radius: 8px;
      font-weight: 700;
      text-decoration: none;
      border: none;
      cursor: pointer;
      font-size: 1rem;
      transition: all 0.3s ease;
      margin-top: 2rem;
      box-shadow: 0 6px 20px rgba(235, 110, 0, 0.25);
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }

    .cta-button:hover {
      transform: translateY(-3px);
      box-shadow: 0 12px 32px rgba(235, 110, 0, 0.35);
      background: linear-gradient(135deg, #C07C00, #EB6E00);
      color: white;
    }

    .cta-button:active {
      transform: translateY(-1px);
    }

    .product-concept {
      margin-bottom: 4rem;
    }

    .concept-card {
      background: white;
      border: 1px solid var(--color-border);
      border-radius: 16px;
      padding: 2.5rem;
      margin-bottom: 2rem;
      box-shadow: 0 4px 16px rgba(10, 61, 98, 0.05);
    }

    .concept-card h3 {
      font-size: 1.3rem;
      color: var(--color-primary);
      margin-bottom: 1rem;
      font-weight: 700;
    }

    .concept-card p {
      color: var(--color-text-light);
      line-height: 1.9;
    }

    .capabilities-box {
      background: linear-gradient(135deg, #f5f9fc 0%, #eef5fb 100%);
      border: 2px solid var(--color-border);
      border-radius: 16px;
      padding: 2.5rem;
      box-shadow: 0 4px 16px rgba(10, 61, 98, 0.05);
    }

    .capabilities-box h4 {
      font-size: 1.2rem;
      color: var(--color-primary);
      margin-bottom: 1.5rem;
      font-weight: 700;
      text-align: center;
    }

    .capabilities-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 1.5rem;
    }

    .capability-item {
      background: white;
      padding: 1.5rem;
      border-radius: 12px;
      text-align: center;
      border: 1px solid var(--color-border);
    }

    .capability-icon {
      font-size: 2rem;
      margin-bottom: 0.5rem;
      display: block;
    }

    .capability-item h5 {
      font-size: 1rem;
      color: var(--color-primary);
      margin-bottom: 0.5rem;
      font-weight: 700;
    }

    .capability-item p {
      font-size: 0.85rem;
      color: var(--color-text-light);
      line-height: 1.6;
    }

    .showcase-inner {
      background: white;
      padding: 3rem;
      border-radius: 12px;
      border: 1px solid var(--color-border);
      box-shadow: 0 4px 16px rgba(10, 61, 98, 0.05);
    }

    .table-wrapper {
      overflow-x: auto;
      margin-bottom: 3rem;
    }

    .size-guide {
      background: white;
      padding: 3rem;
      border-radius: 16px;
      margin: 0 auto 3rem auto;
      border: 1px solid var(--color-border);
      box-shadow: 0 4px 16px rgba(10, 61, 98, 0.05);
      max-width: 900px;
    }

    .size-options-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
      gap: 1.5rem;
    }

    .size-option {
      background: linear-gradient(135deg, #f5f9fc 0%, #eef5fb 100%);
      padding: 1.5rem;
      border-radius: 12px;
      text-align: center;
      border: 1px solid var(--color-border);
    }

    .size-badge {
      display: inline-block;
      background: linear-gradient(135deg, #0a3d62, #0d4d7a);
      color: white;
      padding: 0.5rem 1rem;
      border-radius: 20px;
      font-weight: 700;
      font-size: 0.95rem;
      margin-bottom: 0.75rem;
    }

    .size-option p {
      font-size: 0.85rem;
      color: var(--color-text-light);
      line-height: 1.6;
    }

    .size-selector-box {
      background: white;
      border: 2px solid var(--color-border);
      border-radius: 16px;
      padding: 2.5rem;
      margin: 0 auto 2rem auto;
      box-shadow: 0 4px 16px rgba(10, 61, 98, 0.05);
      max-width: 100%;
    }

    .size-selector-grid {
      display: grid;
      grid-template-columns: repeat(6, 1fr);
      gap: 1rem;
      max-width: 100%;
      margin: 0 auto;
    }

    @media (max-width: 1024px) {
      .size-selector-grid {
        grid-template-columns: repeat(auto-fit, minmax(80px, 1fr));
        gap: 0.75rem;
      }
    }

    @media (max-width: 768px) {
      .size-selector-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 0.75rem;
      }
    }

    .size-selector-item {
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 0.5rem;
      padding: 1rem 0.75rem;
      background: linear-gradient(135deg, #f5f9fc 0%, #eef5fb 100%);
      border-radius: 12px;
      border: 1.5px solid var(--color-border);
      transition: all 0.3s ease;
      text-align: center;
    }

    .size-selector-item:hover {
      border-color: var(--color-primary);
      box-shadow: 0 4px 12px rgba(10, 61, 98, 0.1);
      transform: translateY(-2px);
    }

    .size-circle {
      display: flex;
      align-items: center;
      justify-content: center;
      width: 50px;
      height: 50px;
      background: linear-gradient(135deg, #005A99, #0092DA);
      color: white;
      border-radius: 50%;
      font-weight: 700;
      font-size: 1.1rem;
      flex-shrink: 0;
    }

    .size-selector-item p {
      font-size: 0.75rem;
      color: var(--color-text-light);
      font-weight: 500;
      margin: 0;
      line-height: 1.3;
    }

    .size-selector-item.size-custom {
      background: linear-gradient(135deg, #f0f8ff, #e6f1fb);
      border-color: var(--color-primary);
    }

    .size-circle-custom {
      display: flex;
      align-items: center;
      justify-content: center;
      width: 50px;
      height: 50px;
      background: linear-gradient(135deg, #005A99, #0092DA);
      color: white;
      border-radius: 50%;
      font-weight: 700;
      font-size: 0.7rem;
      text-align: center;
      padding: 0.5rem;
      flex-shrink: 0;
    }

    .size-benefit-box {
      background: white;
      border: 2px solid var(--color-border);
      border-radius: 16px;
      padding: 2.5rem;
      box-shadow: 0 4px 16px rgba(10, 61, 98, 0.05);
      max-width: 100%;
      margin: 0 auto;
    }

    .benefit-cards-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 2rem;
      max-width: 700px;
      margin: 0 auto;
    }

    @media (max-width: 768px) {
      .benefit-cards-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
      }
    }

    .benefit-circle-card {
      display: flex;
      flex-direction: column;
      align-items: center;
      text-align: center;
      padding: 2.5rem 2rem;
      background: linear-gradient(135deg, #f5f9fc 0%, #eef5fb 100%);
      border-radius: 12px;
      border: 1.5px solid var(--color-border);
      transition: all 0.3s ease;
      min-height: 280px;
      justify-content: center;
    }

    .benefit-circle-card:hover {
      border-color: var(--color-primary);
      box-shadow: 0 8px 24px rgba(10, 61, 98, 0.12);
      transform: translateY(-4px);
    }

    .benefit-circle {
      display: flex;
      align-items: center;
      justify-content: center;
      width: 80px;
      height: 80px;
      background: linear-gradient(135deg, #005A99, #0092DA);
      color: white;
      border-radius: 50%;
      font-weight: 700;
      font-size: 2rem;
      margin-bottom: 1.5rem;
      box-shadow: 0 4px 12px rgba(0, 90, 153, 0.2);
    }

    .benefit-circle-card h6 {
      font-size: 1.15rem;
      color: var(--color-primary);
      margin-bottom: 1rem;
      margin-top: 0;
      font-weight: 700;
    }

    .benefit-circle-card p {
      font-size: 0.9rem;
      color: var(--color-text-light);
      line-height: 1.7;
      margin: 0;
    }



    .size-table th {
      background: linear-gradient(135deg, #005A99, #0092DA);
      color: white;
      padding: 1.2rem;
      text-align: left;
      font-weight: 700;
      font-size: 0.95rem;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }

    .size-table td {
      padding: 1rem 1.2rem;
      border-bottom: 1px solid var(--color-border);
      font-size: 0.95rem;
      color: var(--color-text-light);
    }

    .size-table tbody tr:hover {
      background: linear-gradient(90deg, #f5f9fc, #eef5fb);
    }

    .cta-section {
      text-align: center;
      background: linear-gradient(135deg, #f5f9fc 0%, #eef5fb 100%);
      border-radius: 16px;
      margin: 3rem auto;
      border: 2px solid var(--color-border);
      position: relative;
      overflow: hidden;
      box-shadow: 0 12px 40px rgba(10, 61, 98, 0.1);
      padding: 4rem 1.5rem;
      max-width: 600x;
    }

    .cta-section .section-title {
      margin-bottom: 1rem;
    }

    .cta-section p {
      color: var(--color-text-light);
      margin-bottom: 2rem;
      font-size: 1.05rem;
      font-weight: 500;
    }

    .line-cta-section {
      background: linear-gradient(135deg, #00b900 0%, #00a000 100%);
      padding: 4rem 1.5rem;
      text-align: center;
      border-radius: 0;
      margin: 0 auto;
      position: relative;
      overflow: hidden;
      max-width: 1000px;
    }

    .line-cta-section::before {
      content: '';
      position: absolute;
      top: -100px;
      right: -100px;
      width: 300px;
      height: 300px;
      background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
      border-radius: 50%;
    }

    .line-cta-section::after {
      content: '';
      position: absolute;
      bottom: -80px;
      left: -80px;
      width: 280px;
      height: 280px;
      background: radial-gradient(circle, rgba(255,255,255,0.08) 0%, transparent 70%);
      border-radius: 50%;
    }

    .line-cta-section > * {
      position: relative;
      z-index: 1;
    }

    .line-cta-section .section-title::after {
      background: linear-gradient(90deg, rgba(255,255,255,0.6), rgba(255,255,255,0.4));
    }

    .line-button-container {
      display: flex;
      justify-content: center;
      margin: 2rem 0;
    }

    .line-button {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 0.75rem;
      background: white;
      color: #00b900;
      padding: 1.2rem 2.5rem;
      border-radius: 8px;
      font-weight: 700;
      text-decoration: none;
      border: none;
      cursor: pointer;
      font-size: 1rem;
      transition: all 0.3s ease;
      box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }

    .line-button:hover {
      transform: translateY(-3px);
      box-shadow: 0 12px 32px rgba(0, 0, 0, 0.3);
    }

    .line-button:active {
      transform: translateY(-1px);
    }

    .line-icon {
      width: 20px;
      height: 20px;
      display: inline-block;
    }


    @media (max-width: 768px) {
      h1 {
        font-size: 2rem;
      }

      .section-title {
        font-size: 1.4rem;
        margin-bottom: 2rem;
      }

      .case {
        grid-template-columns: 1fr;
        padding: 2rem;
        gap: 2rem;
        display: flex;
        flex-direction: column;
      }

      .case .case-image {
        order: -1;
        width: 100%;
        margin-bottom: 1rem;
        min-height: 250px;
      }

      .case .case-content {
        order: 0;
      }

      .case:nth-child(even) .case-image,
      .case:nth-child(even) .case-content {
        order: unset;
      }

      .case:nth-child(even) .case-image {
        order: -1;
        margin-bottom: 1rem;
      }

      .intro-grid {
        grid-template-columns: 1fr;
      }

      .features-grid {
        grid-template-columns: 1fr;
      }

      .product-details {
        grid-template-columns: 1fr;
      }

      section {
        padding: 2.5rem 1rem;
      }

      header {
        padding: 2rem 1rem;
      }
    }

    @media (max-width: 480px) {
      h1 {
        font-size: 1.5rem;
      }

      .section-title {
        font-size: 1.25rem;
      }

      .intro-card {
        padding: 2rem;
      }

      .feature-box {
        padding: 2rem 1.5rem;
      }

      .size-table {
        font-size: 0.85rem;
      }

      .size-table th,
      .size-table td {
        padding: 0.75rem;
      }

      .cta-button {
        padding: 1rem 2rem;
        font-size: 0.9rem;
      }
    }