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

  body {
      font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
      line-height: 1.6;
      color: #333;
  }

  a {
      text-decoration: none;
      color: inherit;
  }

  ul {
      list-style: none;
  }

  .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
  }

  .head {
      position: sticky;
      z-index: 1000;
      top: 0;
  }

  /* ======================== */
  /* HEADER                   */
  /* ======================== */
  header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 16px;
      padding: 20px;
      background-color: #1a2a3a;
      color: white;
      flex-wrap: wrap;
      position: sticky;
      z-index: 1000;
      top: 0;
  }

  .Logo {
      display: flex;
      align-items: center;
      gap: 15px;
  }

  .Logo img {
      height: 60px;
  }

  .Logo h1 {
      font-size: 1.8rem;
      color: #ff6b00;
  }

  .Logo p {
      font-size: 0.9rem;
      color: #ccc;
  }

  .search-bar {
      flex: 1 1 280px;
      display: flex;
      justify-content: center;
  }

  .search-bar input {
      padding: 8px 15px;
      border-radius: 20px;
      border: none;
      width: min(320px, 100%);
  }

  .phone p {
      font-weight: bold;
      color: #ff6b00;
  }

  .quote-nav-btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 16px;
      margin-left: 12px;
      border-radius: 999px;
      background: #ff6b00;
      color: #fff;
      font-weight: 700;
      text-decoration: none;
      transition: transform 0.2s ease, background 0.2s ease;
  }

  .quote-nav-btn:hover {
      background: #e85d00;
      transform: translateY(-1px);
  }

  /* ======================== */
  /* NAVIGATION               */
  /* ======================== */
  .navbar {
      background-color: #0f1a26;
      padding: 10px 0;
      position: sticky;
      z-index: 1000;
      top: 0;
  }

  .navbar ul {
      display: flex;
      justify-content: center;
      flex-wrap: wrap;
      gap: 20px;
  }

  .navbar ul li a {
      color: #84CC16;
      padding: 5px 10px;
      transition: 0.3s;
      font-weight: 500;
  }

  .navbar ul li a:hover {
      color: #ff6b00;
  }

  .menu-btn {
      display: none;
      background: transparent;
      border: none;
      font-size: 1.8rem;
      color: #1a2e3f;
      cursor: pointer;
      padding: 0.2rem 0.6rem;
      border-radius: 40px;
      transition: 0.2s;
  }

  .menu-btn:hover {
      background: rgba(0, 0, 0, 0.04);
  }

  .menu-btn:focus-visible {
      outline: 2px solid #1f2e3c;
      outline-offset: 3px;
  }

  .menu-btn i {
      pointer-events: none;
  }

  /* ======================== */
  /* HERO SECTION             */
  /* ======================== */
  .hero {
      background-color: #f4f7fa;
      padding: 40px 20px;
  }

  .hero-content {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      max-width: 1200px;
      margin: 0 auto;
      gap: 30px;
  }

  .hero-content div {
      flex: 1 1 300px;
  }

  .hero-content h2 {
      font-size: 2.5rem;
      color: #1a2a3a;
      line-height: 1.2;
  }

  .hero-content p {
      margin: 20px 0;
      font-size: 1.1rem;
      color: #555;
  }

  .hero-content img {
      width: 100%;
      border-radius: 10px;
      box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
  }

  .btn {
      display: inline-block;
      background-color: #ff6b00;
      color: white;
      padding: 12px 25px;
      border-radius: 5px;
      margin-right: 10px;
      margin-bottom: 10px;
      font-weight: bold;
      transition: 0.3s;
  }

  .btn:hover {
      background-color: #e05e00;
      transform: translateY(-2px);
  }

  /* ======================== */
  /* FEATURES                 */
  /* ======================== */
  .features {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
      gap: 5rem;
      max-width: 1200px;
      margin: 40px auto;
      padding: 0 20px;
  }

  .feature {
      text-align: center;
      padding: 20px;
      width: 100%;
      max-width: 25rem;
      background: white;
      border-radius: 10px;
      box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
      transition: 0.3s;
      margin: 0 auto;
  }

  .feature:hover {
      transform: translateY(-5px);
      box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
  }

  .feature img {
      width: 100%;
      height: 17rem;
      object-fit: cover;
      border-radius: 5px;
      margin-bottom: 20px;
  }

  .feature h3 {
      margin-bottom: 10px;
      color: #1a2a3a;
  }

  /* ======================== */
  /* SHOP BY CATEGORY         */
  /* ======================== */
  .shop-with-category {
      text-align: center;
      padding: 40px 20px;
      background-color: white;
  }

  .shop-with-category h2 {
      font-size: 2.2rem;
      color: #1a2a3a;
      margin-bottom: 30px;
  }

  .category {
      display: inline-block;
      margin: 10px;
      width: 200px;
      vertical-align: top;
  }

  .category a {
      display: block;
      background: #f8f9fa;
      padding: 20px;
      border-radius: 10px;
      transition: 0.3s;
  }

  .category a:hover {
      transform: scale(1.05);
      box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
  }

  .category img {
      width: 100%;
      height: 150px;
      object-fit: cover;
      border-radius: 5px;
  }

  .category h3 {
      margin-top: 10px;
      color: #1a2a3a;
  }

  /* ======================== */
  /* WHY CHOOSE TIANDY        */
  /* ======================== */
  .why-choose-Tiandy {
      max-width: 1200px;
      margin: 40px auto;
      padding: 0 20px;
  }

  .why-choose-Tiandy h2 {
      font-size: 2.2rem;
      color: #1a2a3a;
      text-align: center;
      margin-bottom: 20px;
  }

  .why-choose-Tiandy>div {
      background: #f8f9fa;
      padding: 30px;
      border-radius: 10px;
      margin-bottom: 20px;
  }

  .why-choose-Tiandy ul {
      list-style: disc;
      padding-left: 20px;
  }

  .why-choose-Tiandy ul li {
      margin-bottom: 10px;
      line-height: 1.6;
  }

  /* ======================== */
  /* NVR PRODUCTS             */
  /* ======================== */
  .section-title {
      text-align: center;
      font-size: 2.5rem;
      color: #0B4EA2;
      margin: 40px 0;
  }

  .nvr-products {
      width: 95%;
      margin: auto;
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(420px, 1fr));
      gap: 40px;
      padding-bottom: 70px;
  }

  .nvr-card {
      background: white;
      border-radius: 15px;
      overflow: hidden;
      box-shadow: 0 12px 25px rgba(0, 0, 0, .12);
      transition: .35s;
      min-height: 620px;
  }

  .nvr-card:hover {
      transform: translateY(-10px);
  }

  .nvr-card img {
      width: 100%;
      height: 320px;
      object-fit: cover;
  }

  .nvr-card-content {
      padding: 30px;
  }

  .nvr-card h3 {
      color: #0B4EA2;
      font-size: 30px;
      margin-bottom: 18px;
  }

  .nvr-card p {
      line-height: 1.8;
      font-size: 18px;
      margin-bottom: 20px;
  }

  .price {
      color: #009688;
      font-size: 32px;
      font-weight: bold;
      margin-bottom: 25px;
  }

  /* ======================== */
  /* ABOUT SECTION            */
  /* ======================== */
  .about-section {
      width: 100%;
      padding: 80px 10%;
      background: white;
  }

  .about-containersection {
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 60px;
      flex-wrap: wrap;
  }

  .about-imagesection {
      flex: 1;
      min-width: 300px;
  }

  .about-imagesection img {
      width: 100%;
      border-radius: 15px;
      box-shadow: 0 15px 30px rgba(0, 0, 0, .2);
  }

  .about-contentsection {
      flex: 1;
      min-width: 300px;
  }

  .about-contentsection h4 {
      color: #0077ff;
      font-size: 18px;
      margin-bottom: 10px;
      text-transform: uppercase;
      letter-spacing: 2px;
  }

  .about-contentsection h2 {
      font-size: 42px;
      margin-bottom: 20px;
      color: #222;
  }

  .about-contentsection p {
      color: #555;
      line-height: 1.8;
      margin-bottom: 18px;
      font-size: 17px;
  }

  .features-About {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 15px;
      margin: 30px 0;
  }

  .feature-About {
      background: #f7f9fc;
      padding: 18px;
      border-left: 5px solid #0077ff;
      border-radius: 8px;
      font-weight: bold;
      color: #333;
      transition: .3s;
  }

  .feature-About:hover {
      background: #0077ff;
      color: white;
      transform: translateY(-5px);
  }

  .btn-About {
      display: inline-block;
      background: #0077ff;
      color: white;
      padding: 14px 35px;
      text-decoration: none;
      border-radius: 30px;
      transition: .3s;
      font-weight: bold;
  }

  .btn-About:hover {
      background: #0058c9;
  }

  /* ======================== */
  /* TESTIMONIALS             */
  /* ======================== */
  .testimonials-section {
      padding: 80px 8%;
      background: #f8f9fa;
  }

  .section-header {
      text-align: center;
      margin-bottom: 50px;
  }

  .eyebrow {
      display: inline-block;
      font-size: 14px;
      color: #0d6efd;
      text-transform: uppercase;
      font-weight: 600;
      letter-spacing: 1px;
      margin-bottom: 10px;
  }

  .section-header h2 {
      font-size: 38px;
      color: #222;
  }

  .testimonials-track {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 25px;
  }

  .testimonial-card {
      background: #fff;
      padding: 30px;
      border-radius: 12px;
      border: 1px solid #e5e5e5;
      transition: 0.3s ease;
      box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
  }

  .testimonial-card:hover {
      transform: translateY(-8px);
      box-shadow: 0 10px 25px rgba(0, 0, 0, 0.12);
  }

  .stars {
      color: #f4b400;
      margin-bottom: 18px;
      font-size: 18px;
  }

  .stars i {
      margin-right: 3px;
  }

  .testimonial-card p {
      color: #555;
      font-size: 15px;
      line-height: 1.8;
      margin-bottom: 25px;
  }

  .client {
      display: flex;
      align-items: center;
      gap: 15px;
  }

  .client-avatar {
      width: 55px;
      height: 55px;
      background: #0d6efd;
      color: white;
      border-radius: 50%;
      display: flex;
      justify-content: center;
      align-items: center;
      font-weight: bold;
      font-size: 18px;
  }

  .client strong {
      display: block;
      font-size: 16px;
      color: #222;
  }

  .client span {
      display: block;
      font-size: 13px;
      color: #777;
      margin-top: 3px;
  }

  .testimonial-nav {
      display: flex;
      justify-content: center;
      gap: 15px;
      margin-top: 40px;
  }

  .testimonial-nav button {
      width: 45px;
      height: 45px;
      border: none;
      border-radius: 50%;
      background: #0d6efd;
      color: #fff;
      cursor: pointer;
      font-size: 18px;
      transition: 0.3s;
  }

  .testimonial-nav button:hover {
      background: #084298;
      transform: scale(1.08);
  }

  /* ======================== */
  /* CONTACT SECTION          */
  /* ======================== */
  .contact-section {
      padding: 40px 20px;
      background-color: #f4f7fa;
  }

  .contact-section h2 {
      text-align: center;
      font-size: 2.2rem;
      color: #1a2a3a;
      margin-bottom: 30px;
  }

  .contact-container {
      display: flex;
      flex-wrap: wrap;
      gap: 40px;
      max-width: 1200px;
      margin: 0 auto;
  }

  .contact-info,
  .contact-form {
      flex: 1 1 400px;
      background: white;
      padding: 30px;
      border-radius: 10px;
      box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
  }

  .contact-info h3,
  .contact-form h3 {
      color: #1a2a3a;
      margin-bottom: 20px;
      font-size: 1.5rem;
  }

  .contact-info p {
      margin-bottom: 15px;
      display: flex;
      align-items: center;
      gap: 10px;
  }

  .contact-info i {
      color: #ff6b00;
      width: 25px;
  }

  .social-icons {
      display: flex;
      gap: 15px;
      margin: 20px 0;
  }

  .social-icons a {
      background: #1a2a3a;
      color: white;
      width: 40px;
      height: 40px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      transition: 0.3s;
  }

  .social-icons a:hover {
      background: #ff6b00;
      transform: translateY(-3px);
  }

  .contact-form input,
  .contact-form select,
  .contact-form textarea {
      width: 100%;
      padding: 12px;
      margin-bottom: 15px;
      border: 1px solid #ddd;
      border-radius: 5px;
      font-family: inherit;
  }

  .contact-form button {
      background-color: #ff6b00;
      color: white;
      padding: 15px 30px;
      border: none;
      border-radius: 5px;
      font-size: 1.1rem;
      font-weight: bold;
      cursor: pointer;
      transition: 0.3s;
  }

  .contact-form button:hover {
      background-color: #e05e00;
  }

  .map {
      margin-top: 20px;
      border-radius: 10px;
      overflow: hidden;
  }

  /* ======================== */
  /* FOOTER                   */
  /* ======================== */
  footer {
      background-color: #0f1a26;
      color: white;
      padding: 40px 20px 20px;
  }

  footer>section {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 30px;
      max-width: 1200px;
      margin: 0 auto;
  }

  footer h1 {
      color: #ff6b00;
      font-size: 1.3rem;
      margin-bottom: 15px;
  }

  footer ul li {
      margin-bottom: 8px;
  }

  footer ul li a:hover {
      color: #ff6b00;
  }

  footer p {
      margin-bottom: 10px;
  }

  footer .cctv-abouts .social-icons a {
      background: #ff6b00;
  }

  footer .cctv-abouts .social-icons a:hover {
      background: white;
      color: #ff6b00;
  }

  .copyright {
      text-align: center;
      margin-top: 40px;
      padding-top: 20px;
      border-top: 1px solid #2a3a4a;
      color: #aaa;
  }

  /* ======================== */
  /* RESPONSIVE DESIGN        */
  /* ======================== */

  /* Tablet and below */
  @media (max-width: 900px) {

      .hero-content {
          flex-direction: column;
      }

      .hero-content h2 {
          font-size: 2rem;
      }

      .features {
          gap: 1.5rem;
      }

      .about-containersection {
          flex-direction: column;
      }

      .about-contentsection h2 {
          font-size: 34px;
      }

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

  /* Mobile */
  @media (max-width: 600px) {


      .hero {
          padding: 24px 14px;
      }

      .btn {
          width: 100%;
          text-align: center;
          margin-right: 0;
      }

      .shop-with-category {
          padding: 24px 14px;
      }

      .category {
          width: min(100%, 220px);
          margin: 10px 0;
      }

      .testimonials-track {
          grid-template-columns: 1fr;
      }

      .section-header h2 {
          font-size: 26px;
      }

      .nvr-products {
          grid-template-columns: 1fr;
      }
  }

  /* Hamburger Menu - Mobile */
  @media (max-width: 850px) {


      .quote-nav-btn {
          font-size: 0.8rem;
          padding: 0.4rem 1.2rem;
      }

      .menu-btn {
          display: block;
          margin-right: 0.2rem;
      }



      #navList {
          display: none;
          flex-direction: column;
          align-items: stretch;
          width: 100%;
          gap: 0.2rem;
          padding: 0.8rem 0 0.3rem 0;
          border-top: 1px solid rgba(0, 0, 0, 0.04);
          margin-top: 0.4rem;
      }

      #navList.nav-open {
          display: flex;
      }

      #navList li a {
          padding: 0.7rem 1rem;
          font-size: 0.95rem;
          border-radius: 30px;
          width: 100%;
          text-align: left;
          background: transparent;
      }

      #navList li a:hover {
          background: #d0e0ef;
      }


  }


/* ======================== */
/* RESPONSIVE DESIGN        */
/* ======================== */

/* Medium screens */
@media screen and (max-width: 860px) {
    header {
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: flex-start;
    }

    .Logo {
        flex: 1 1 100%;
        justify-content: center;
        margin-bottom: 0.2rem;
    }

    .Logo h1 {
        font-size: 1.8rem;
    }

    .quote-nav-btn {
        order: 2;
        margin-left: auto;
    }

    .search-bar {
        order: 3;
        flex: 1 1 180px;
        min-width: 140px;
    }

    .phone {
        order: 4;
        flex: 0 1 auto;
        margin-left: auto;
    }

    .phone p {
        font-size: 0.8rem;
        padding: 0.25rem 1rem;
    }

    .navbar ul {
        gap: 0.2rem 0.6rem;
    }

    .navbar ul li a {
        font-size: 0.85rem;
    }
}

/* Mobile devices - collapse nav, show hamburger */
@media screen and (max-width: 700px) {
    .header-wrapper {
        border-radius: 20px;
    }

    header {
        padding: 0.8rem 1rem;
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: center;
    }

    .Logo {
        flex: 1 1 100%;
        justify-content: center;
        margin-bottom: 0.2rem;
        gap: 0.3rem;
    }

    .Logo img {
        height: 44px;
    }

    .Logo h1 {
        font-size: 1.6rem;
        white-space: normal;
    }

    .Logo p {
        font-size: 0.7rem;
        padding: 0.1rem 0.8rem;
        white-space: normal;
    }

    .quote-nav-btn {
        font-size: 0.8rem;
        padding: 0.4rem 1.2rem;
        order: 1;
        margin-left: 0;
    }

    .search-bar {
        order: 2;
        flex: 1 1 150px;
        min-width: 120px;
        margin: 0.2rem 0;
    }

    .phone {
        order: 3;
        flex: 1 1 100%;
        justify-content: center;
        margin: 0.2rem 0 0 0;
    }

    .phone p {
        font-size: 0.8rem;
        padding: 0.3rem 1.2rem;
        width: auto;
        justify-content: center;
    }

    /* navbar: show hamburger, hide list by default */
    .navbar {
        padding: 0.5rem 1rem 0.8rem 1rem;
        flex-wrap: wrap;
        justify-content: space-between;
    }

    .menu-btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
    }

    .navbar ul {
        display: none;
        flex-direction: column;
        width: 100%;
        margin-top: 0.8rem;
        gap: 0.2rem;
        background: #f8faff;
        padding: 0.8rem 0.5rem;
        border-radius: 24px;
        border: 1px solid #e8eef5;
    }

    .navbar ul.show {
        display: flex;
    }

    .navbar ul li {
        width: 100%;
        text-align: center;
        border-bottom: 1px solid #eef2f7;
        padding: 0.3rem 0;
    }

    .navbar ul li:last-child {
        border-bottom: none;
    }

    .navbar ul li a {
        font-size: 1rem;
        padding: 0.5rem 0;
        display: block;
        white-space: normal;
        border-bottom: none;
    }

    .navbar ul li a:hover {
        background: #e4ecf5;
        border-radius: 40px;
        border-bottom: none;
    }
}

/* Very small screens */
@media screen and (max-width: 430px) {
    .Logo h1 {
        font-size: 1.3rem;
    }

    .Logo img {
        height: 36px;
    }

    .quote-nav-btn {
        font-size: 0.7rem;
        padding: 0.3rem 1rem;
    }

    .search-bar input {
        padding: 0.4rem 1rem;
        font-size: 0.8rem;
    }

    .phone p {
        font-size: 0.7rem;
        padding: 0.2rem 0.8rem;
    }

    .navbar {
        padding: 0.3rem 0.8rem 0.6rem 0.8rem;
    }
}

/* Landscape phones */
@media screen and (max-width: 700px) and (orientation: landscape) {
    .navbar ul {
        max-height: 60vh;
        overflow-y: auto;
    }
}

/* Utility class for toggling */
.navbar ul.show {
    display: flex !important;
}