/* Mobile Responsive */
        @media (max-width: 768px) {
            .header-container {
                flex-direction: column;
                align-items: center;
                text-align: center;
                gap: 1rem;
            }

            nav ul {
                flex-wrap: wrap;
                justify-content: center;
                gap: 1rem;
            }

            body {
              font-size: 18px;
            }
            .hero {
                grid-template-columns: 1fr;
                text-align: center;
                gap: 2rem;
                max-width: 100vw;
            }
            .hero-images{
              max-width: 100vw;
            }
            .hero-content{
              max-width: 100vw;
            }
            .hero-content h2 {
              max-width: 100vw;
                font-size: 2rem;
            }
            
            .frames-grid {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    padding: 1rem;
  }

  .frames-box,
  .frames-box-left {
    width: 100%;
    padding: 1rem;
    text-align: center;
  }

  .frames-box img,
  .frames-box-left img {
    width: 100%;
    height: auto;
    border-radius: 10px;
    object-fit: cover;
    margin: 0 auto;
  }

  .frames-box h2,
  .frames-box-left h2 {
    font-size: 1.5rem;
    margin: 1rem 0;
    text-align: center;
  }

  .frames-box-left a {
    display: inline-block;
    margin: 0 auto;
    text-align: center;
    font-size: 1rem;
  }
            .products-grid {
              display: grid;
                grid-template-columns: 1fr;
            }

            
           

            /* about*/
            .about-container {
              flex-direction: column;
              height: auto;
              overflow: visible;
            }

            .about-left {
              padding: 1.5rem;
              text-align: center;
              justify-content: flex-start;
            }

            .about-left h1 {
              font-size: 2rem;
              margin-bottom: 1rem;
            }

            .about-left p {
              font-size: 1rem;
              line-height: 1.6;
              margin-bottom: 1rem;
            }

            .about-right {
              height: 200px;
              background-size: cover;
              background-position: center;
              position: relative;
            }

            .about-right::after {
              background: rgba(0, 0, 0, 0.2);
            }

            .about-footer {
              position: static;
              margin-top: 1rem;
              text-align: center;
              font-size: 0.95rem;
            }

            .about-section h1 {
              font-size: 2rem;
              padding: 1rem;
            }

            .about-grid {
              grid-template-columns: 1fr;
              padding: 1rem;
            }
           
            .about-box {
              padding: 1rem;
            }

            /* Phần giữa: đảo lại thứ tự hình và chữ */
            .about-grid > .about-box:nth-child(3) {
              order: 2; /* hình xuống dưới */
            }

            .about-grid > .about-box:nth-child(4) {
              order: 1; /* chữ lên trên */
            }
            .about-box img {
              width: 100%;
              height: auto;
              object-fit: cover;
            }

            .about-box h2 {
              font-size: 1.5rem;
              margin-bottom: 0.5rem;
            }

            .about-box p {
              font-size: 1rem;
              margin: 0;
              text-align: left;
            }
    }
        @media (max-width: 480px) {
            .hero-content h2 {
                font-size: 1.5rem;
            }

            .hero-content p {
                font-size: 1rem;
            }

            .products-section h3 {
                font-size: 2rem;
            }
        }