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

    :root {
      --blue-dark: #003366;
      --blue-main: #0055a4;
      --blue-light: #1a73c8;
      --orange: #e8481c;
      --gray-bg: #f4f5f7;
      --gray-line: #d8dce3;
      --text-dark: #1a1a1a;
      --text-mid: #444;
      --text-muted: #888;
      --white: #ffffff;
      --font: 'Source Sans 3', sans-serif;
    }

    body {
      font-family: var(--font);
      color: var(--text-dark);
      background: var(--white);
    }

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

    .container {
      max-width: 1200px;
      margin: 0 auto;
      width: 100%;
    }

    /* ── TOP BAR ── */
    .topbar {
      background: var(--blue-dark);
      color: var(--white);
      font-size: 15.6px;
      height: 40px;
    }

    .topbar-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 32px;
      height: 100%;
    }

    .topbar-left {
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .topbar-left .flag {
      font-size: 21.6px;
    }

    .topbar-left select {
      background: transparent;
      border: none;
      color: var(--white);
      font-size: 15.6px;
      font-family: var(--font);
      cursor: pointer;
      outline: none;
    }

    .topbar-left select option {
      color: var(--text-dark);
      background: var(--white);
    }

    .topbar-right {
      display: flex;
      align-items: center;
      gap: 28px;
    }

    .topbar-right a {
      color: var(--white);
      font-size: 15.6px;
      opacity: .9;
      transition: opacity .2s;
    }

    .topbar-right a:hover {
      opacity: 1;
    }

    .btn-download {
      background: var(--blue-light);
      padding: 6px 14px;
      border-radius: 3px;
      display: flex;
      align-items: center;
      gap: 6px;
      font-weight: 600;
    }

    .btn-download svg {
      width: 14px;
      height: 14px;
    }

    /* ── HEADER / NAV ── */
    header {
      background: var(--white);
      border-bottom: 2px solid var(--gray-line);
      height: 68px;
      position: sticky;
      top: 0;
      z-index: 100;
      box-shadow: 0 2px 8px rgba(0, 0, 0, .06);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 32px;
      height: 100%;
    }

    .logo {
      border: 2px solid var(--blue-main);
      padding: 6px 14px;
      font-size: 26.4px;
      font-weight: 700;
      color: var(--blue-main);
      letter-spacing: 1px;
      display: inline-block;
    }

    nav {
      display: flex;
      align-items: center;
      gap: 4px;
    }

    nav a {
      padding: 22px 18px;
      font-size: 18px;
      font-weight: 600;
      color: var(--text-mid);
      position: relative;
      transition: color .2s;
      border-bottom: 3px solid transparent;
    }

    nav a:hover {
      color: var(--blue-main);
    }

    nav a.active {
      color: var(--blue-main);
      border-bottom-color: var(--blue-main);
    }

    .header-right {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .search-box {
      border: 1px solid var(--gray-line);
      border-radius: 4px;
      padding: 7px 36px 7px 12px;
      font-size: 16.8px;
      font-family: var(--font);
      color: var(--text-muted);
      width: 190px;
      outline: none;
      position: relative;
    }

    .search-wrap {
      position: relative;
    }

    .search-wrap button {
      position: absolute;
      right: 10px;
      top: 50%;
      transform: translateY(-50%);
      color: var(--text-muted);
      background: none;
      border: none;
      padding: 0;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .search-wrap button svg {
      width: 16px;
      height: 16px;
    }

    /* ── BREADCRUMB ── */
    .breadcrumb {
      max-width: 1200px;
      margin: 0 auto;
      padding: 10px 32px;
      font-size: 15.6px;
      color: var(--text-muted);
      background: var(--white);
    }

    .breadcrumb a {
      color: var(--blue-main);
    }

    .breadcrumb span {
      margin: 0 6px;
    }

    /* ── HERO ── */
    .hero {
      display: grid;
      grid-template-columns: 1fr 1.1fr;
      min-height: 420px;
      background: var(--white);
      overflow: hidden;
    }

    .hero-text {
      padding: 64px 48px 64px 32px;
      display: flex;
      flex-direction: column;
      justify-content: center;
    }

    .hero-text h1 {
      font-size: 50.4px;
      font-weight: 300;
      color: var(--text-dark);
      line-height: 1.15;
      margin-bottom: 18px;
      letter-spacing: -.5px;
    }

    .hero-text p.subtitle {
      font-size: 20.4px;
      color: var(--text-mid);
      margin-bottom: 20px;
      font-weight: 400;
    }

    .hero-text ul {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .hero-text ul li {
      font-size: 18px;
      color: var(--text-mid);
      padding-left: 20px;
      position: relative;
      line-height: 1.5;
    }

    .hero-text ul li::before {
      content: '•';
      color: var(--blue-main);
      position: absolute;
      left: 0;
      font-size: 21.6px;
      line-height: 1.2;
    }

    .hero-image {
      background: linear-gradient(135deg, #b8c5d4 0%, #8fa3b8 40%, #6a8096 100%);
      position: relative;
      overflow: hidden;
      display: flex;
      align-items: center;
      justify-content: flex-end;
    }

    .hero-image .hero-logo-badge {
      position: absolute;
      bottom: 28px;
      right: 28px;
      background: rgba(255, 255, 255, 0.15);
      border: 2px solid rgba(255, 255, 255, 0.5);
      padding: 10px 20px;
      font-size: 24px;
      font-weight: 700;
      color: var(--white);
      letter-spacing: 2px;
      backdrop-filter: blur(4px);
    }

    /* decorative circles */
    .hero-image::before {
      content: '';
      position: absolute;
      width: 280px;
      height: 280px;
      border-radius: 50%;
      background: rgba(255, 255, 255, .12);
      top: 40px;
      left: -60px;
    }

    .hero-image::after {
      content: '';
      position: absolute;
      width: 160px;
      height: 160px;
      border-radius: 50%;
      border: 3px solid rgba(255, 255, 255, .3);
      bottom: 60px;
      left: 80px;
    }

    /* ── CATEGORY CARDS ── */
    .categories {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 0;
      margin: 32px 32px 0;
      gap: 20px;
    }

    .cat-card {
      border-radius: 4px;
      overflow: hidden;
      position: relative;
      min-height: 210px;
      background: linear-gradient(180deg, #6a8096 0%, #2b3d50 100%);
      display: flex;
      align-items: flex-end;
      cursor: pointer;
      transition: transform .25s;
    }

    .cat-card:hover {
      transform: translateY(-3px);
    }

    .cat-card-bg {
      position: absolute;
      inset: 0;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .cat-icon-group {
      display: flex;
      gap: 8px;
      flex-wrap: wrap;
      justify-content: center;
      align-items: center;
      padding: 24px;
      opacity: .9;
    }

    /* Product silhouette placeholder */
    .prod-silhouette {
      width: 64px;
      height: 64px;
      background: rgba(255, 255, 255, .18);
      border-radius: 8px;
      border: 1px solid rgba(255, 255, 255, .25);
    }

    .prod-silhouette.sm {
      width: 40px;
      height: 40px;
    }

    .prod-silhouette.lg {
      width: 80px;
      height: 80px;
    }

    .cat-card-label {
      position: relative;
      z-index: 2;
      background: linear-gradient(transparent, rgba(0, 0, 0, .65));
      width: 100%;
      padding: 40px 20px 18px;
      color: var(--white);
      font-size: 21.6px;
      font-weight: 600;
      letter-spacing: .3px;
    }

    /* ── FILTER BAR ── */
    .filter-section {
      padding: 28px 32px 0;
    }

    .filter-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 16px;
    }

    .filter-title {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 19.2px;
      font-weight: 600;
      color: var(--text-dark);
    }

    .filter-title svg {
      width: 18px;
      height: 18px;
      color: var(--text-mid);
    }

    .product-count {
      font-size: 16.8px;
      color: var(--text-muted);
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .view-btn {
      width: 28px;
      height: 28px;
      border: 1px solid var(--gray-line);
      border-radius: 4px;
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      background: var(--white);
      transition: background .2s;
    }

    .view-btn.active {
      background: var(--blue-main);
      border-color: var(--blue-main);
    }

    .view-btn.active svg {
      color: var(--white);
    }

    .view-btn svg {
      width: 14px;
      height: 14px;
      color: var(--text-muted);
    }

    .filter-controls {
      display: flex;
      gap: 10px;
      flex-wrap: wrap;
      margin-bottom: 8px;
    }

    .filter-select {
      border: 1px solid var(--gray-line);
      border-radius: 4px;
      padding: 9px 32px 9px 12px;
      font-size: 15.6px;
      font-family: var(--font);
      color: var(--text-dark);
      background: var(--white) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23888' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E") no-repeat right 10px center;
      appearance: none;
      cursor: pointer;
      outline: none;
      min-width: 160px;
    }

    .filter-divider {
      border: none;
      border-top: 1px solid var(--gray-line);
      margin: 16px 0;
    }

    /* ── PRODUCT GRID ── */
    .product-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 0;
      padding: 0 32px;
    }

    .product-card {
      padding: 20px 16px;
      border-bottom: 1px solid var(--gray-line);
      border-right: 1px solid var(--gray-line);
      transition: background .2s;
      cursor: pointer;
      position: relative;
    }

    .product-card:hover {
      background: #f8fafc;
    }

    .product-grid .product-card:nth-child(4n) {
      border-right: none;
    }

    /* ── PRODUCT LIST ── */
    .product-list {
      display: grid;
      grid-template-columns: 1fr;
      gap: 0;
      padding: 0 32px;
    }

    .product-list .product-card {
      display: grid;
      grid-template-columns: 180px 1fr;
      grid-template-rows: auto 1fr;
      column-gap: 24px;
      padding: 24px;
      border-bottom: 1px solid var(--gray-line);
      border-right: none;
    }

    .product-list .product-img {
      grid-column: 1 / 2;
      grid-row: 1 / 3;
      margin-bottom: 0;
    }

    .product-list .product-name {
      grid-column: 2 / 3;
      grid-row: 1 / 2;
      margin-bottom: 8px;
    }

    .product-list .product-desc {
      grid-column: 2 / 3;
      grid-row: 2 / 3;
    }

    .product-img {
      width: 100%;
      aspect-ratio: 1;
      background: var(--white);
      border-radius: 6px;
      margin-bottom: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      position: relative;
      overflow: hidden;
    }

    /* Flowmeter SVG placeholder */
    .product-img svg {
      width: 70%;
      height: 70%;
      opacity: .45;
    }

    .badge-update {
      position: absolute;
      top: 0;
      left: 0;
      background: var(--orange);
      color: var(--white);
      font-size: 12px;
      font-weight: 700;
      padding: 4px 8px;
      border-radius: 4px 0 4px 0;
      text-transform: uppercase;
      letter-spacing: .5px;
    }

    .badge-sil {
      position: absolute;
      top: 6px;
      left: 6px;
      width: 42px;
      height: 42px;
      background: rgba(255, 255, 255, .9);
      border: 1px solid #ddd;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 10.8px;
      font-weight: 700;
      color: #c44;
      text-align: center;
      line-height: 1.2;
    }

    .badge-virtual {
      position: absolute;
      bottom: 6px;
      right: 6px;
      background: rgba(255, 255, 255, .9);
      border: 1px solid #ddd;
      border-radius: 50%;
      width: 40px;
      height: 40px;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      font-size: 9.6px;
      color: var(--text-muted);
      text-align: center;
      line-height: 1.3;
    }

    .product-name {
      font-size: 15.6px;
      font-weight: 700;
      color: var(--blue-main);
      margin-bottom: 6px;
      letter-spacing: .3px;
      text-transform: uppercase;
      font-size: 14.4px;
    }

    .product-desc {
      font-size: 14.4px;
      color: var(--text-mid);
      line-height: 1.5;
    }

    /* ── SHOW MORE ── */
    .show-more-section {
      padding: 32px;
      text-align: center;
      border-top: 1px solid var(--gray-line);
      margin: 0 32px;
    }

    .show-progress {
      font-size: 15.6px;
      color: var(--text-muted);
      margin-bottom: 14px;
    }

    .progress-bar {
      width: 240px;
      height: 3px;
      background: var(--gray-line);
      border-radius: 2px;
      margin: 8px auto 20px;
      overflow: hidden;
    }

    .progress-fill {
      width: 20%;
      height: 100%;
      background: var(--blue-main);
      border-radius: 2px;
    }

    .btn-group {
      display: flex;
      justify-content: center;
      gap: 2px;
    }

    .btn-show {
      display: flex;
      align-items: center;
      gap: 8px;
      padding: 10px 22px;
      background: var(--blue-main);
      color: var(--white);
      font-size: 16.8px;
      font-weight: 600;
      font-family: var(--font);
      border: none;
      cursor: pointer;
      transition: background .2s;
    }

    .btn-show:hover {
      background: var(--blue-dark);
    }

    .btn-show.outline {
      background: transparent;
      border: 1px solid var(--blue-main);
      color: var(--blue-main);
    }

    .btn-show.outline:hover {
      background: var(--blue-main);
      color: var(--white);
    }

    .btn-show svg {
      width: 16px;
      height: 16px;
    }

    .btn-divider {
      width: 1px;
      background: rgba(255, 255, 255, .4);
    }

    /* ── NEWSLETTER ── */
    .newsletter {
      display: grid;
      grid-template-columns: 1fr 1fr;
      min-height: 220px;
      margin-top: 48px;
      overflow: hidden;
    }

    .newsletter-text {
      background: var(--blue-main);
      padding: 52px 52px 52px 32px;
      display: flex;
      flex-direction: column;
      justify-content: center;
    }

    .newsletter-text h2 {
      font-size: 31.2px;
      font-weight: 300;
      color: var(--white);
      margin-bottom: 14px;
      line-height: 1.3;
    }

    .newsletter-text p {
      font-size: 16.8px;
      color: rgba(255, 255, 255, .85);
      margin-bottom: 24px;
      line-height: 1.6;
    }

    .newsletter-form {
      display: flex;
      gap: 0;
    }

    .newsletter-form input {
      flex: 1;
      padding: 11px 16px;
      font-size: 16.8px;
      font-family: var(--font);
      border: none;
      outline: none;
      border-radius: 0;
    }

    .newsletter-form input::placeholder {
      color: #aaa;
    }

    .btn-subscribe {
      background: var(--blue-dark);
      color: var(--white);
      border: none;
      padding: 11px 20px;
      font-size: 16.8px;
      font-weight: 600;
      font-family: var(--font);
      cursor: pointer;
      display: flex;
      align-items: center;
      gap: 8px;
      transition: background .2s;
      white-space: nowrap;
    }

    .btn-subscribe:hover {
      background: #001f44;
    }

    .newsletter-image {
      background: linear-gradient(135deg, #1a73c8, #003366);
      display: flex;
      align-items: center;
      justify-content: center;
      position: relative;
      overflow: hidden;
    }

    /* keyboard illustration */
    .keyboard-visual {
      position: relative;
      display: flex;
      gap: 6px;
    }

    .key {
      background: rgba(255, 255, 255, .15);
      border: 1px solid rgba(255, 255, 255, .3);
      border-radius: 5px;
      backdrop-filter: blur(6px);
    }

    .key.main {
      width: 90px;
      height: 90px;
      background: var(--blue-light);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 13.2px;
      font-weight: 700;
      color: var(--white);
      text-align: center;
      line-height: 1.3;
    }

    .key.sm {
      width: 52px;
      height: 52px;
    }

    .key.xs {
      width: 36px;
      height: 36px;
    }

    /* ── FOOTER ── */
    footer {
      padding: 52px 32px 0;
      background: var(--white);
      border-top: 1px solid var(--gray-line);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
      padding-bottom: 48px;
      border-bottom: 1px solid var(--gray-line);
      max-width: 1200px;
      margin: 0 auto;
      text-align: left;
    }

    .footer-col h4 {
      font-size: 16.8px;
      font-weight: 700;
      color: var(--text-dark);
      margin-bottom: 16px;
      letter-spacing: .3px;
    }

    .footer-col p,
    .footer-col address {
      font-size: 15.6px;
      color: var(--text-mid);
      line-height: 1.7;
      font-style: normal;
    }

    .footer-col ul {
      list-style: none;
    }

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

    .footer-col ul li a {
      font-size: 15.6px;
      color: var(--text-mid);
      transition: color .2s;
    }

    .footer-col ul li a:hover {
      color: var(--blue-main);
    }

    .footer-links-section {
      margin-top: 24px;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .footer-links-section a {
      font-size: 15.6px;
      font-weight: 600;
      color: var(--text-dark);
      transition: color .2s;
    }

    .footer-links-section a:hover {
      color: var(--blue-main);
    }

    .footer-divider {
      border: none;
      border-top: 1px solid var(--gray-line);
    }

    /* footer bottom bar */
    .footer-bottom {
      background: var(--blue-main);
      padding: 14px 32px;
    }

    .footer-bottom-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      max-width: 1200px;
      margin: 0 auto;
    }

    .footer-bottom-left {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 15.6px;
      color: rgba(255, 255, 255, .85);
    }

    .footer-bottom-left .flag {
      font-size: 21.6px;
    }

    .footer-bottom-nav {
      display: flex;
      gap: 20px;
    }

    .footer-bottom-nav a {
      font-size: 14.4px;
      color: rgba(255, 255, 255, .8);
      transition: color .2s;
    }

    .footer-bottom-nav a:hover {
      color: var(--white);
    }

    .social-icons {
      display: flex;
      gap: 16px;
    }

    .social-icons a {
      color: rgba(255, 255, 255, .8);
      font-size: 16.8px;
      font-weight: 700;
      transition: color .2s;
      display: flex;
      align-items: center;
    }

    .social-icons a:hover {
      color: var(--white);
    }

    .footer-logo-bar {
      background: var(--blue-main);
      padding: 0 32px 20px;
    }

    .footer-logo-bar-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      max-width: 1200px;
      margin: 0 auto;
    }

    .footer-logo {
      border: 2px solid var(--white);
      padding: 5px 12px;
      font-size: 21.6px;
      font-weight: 700;
      color: var(--white);
      letter-spacing: 1px;
      display: inline-block;
    }

    /* ── CONTACT BUTTON ── */
    .contact-btn {
      position: fixed;
      right: 0;
      bottom: 40px;
      background: #25D366;
      color: var(--white);
      width: 44px;
      height: 44px;
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: 4px 0 0 4px;
      z-index: 200;
      cursor: pointer;
      box-shadow: -2px 2px 12px rgba(0, 0, 0, .2);
      transition: width .2s;
    }

    .contact-btn svg {
      width: 20px;
      height: 20px;
    }

    /* ── UTILITY ── */
    .sr-only {
      position: absolute;
      width: 1px;
      height: 1px;
      overflow: hidden;
      clip: rect(0, 0, 0, 0);
    }

    .hamburger {
      display: none;
      cursor: pointer;
      padding: 4px;
      margin-left: 12px;
    }

    .hamburger svg {
      width: 24px;
      height: 24px;
      stroke: var(--text-mid);
    }

    @media (max-width: 1100px) {
      .product-grid {
        grid-template-columns: repeat(3, 1fr);
      }

      .product-card:nth-child(6n) {
        border-right: 1px solid var(--gray-line);
      }

      .product-card:nth-child(3n) {
        border-right: none;
      }

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

    @media (max-width: 768px) {
      .header-inner, .topbar-inner {
        padding: 0 16px;
      }

      .search-wrap {
        display: none;
      }

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

      .hero-text {
        display: none;
      }

      .hero-image {
        display: flex;
        width: 100%;
        min-height: 420px;
      }

      .categories {
        grid-template-columns: 1fr;
        margin: 16px;
      }

      .product-grid {
        grid-template-columns: repeat(2, 1fr);
        padding: 0 16px;
      }

      .hamburger {
        display: block;
      }

      nav {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 68px;
        left: 0;
        width: 100%;
        background: var(--white);
        box-shadow: 0 4px 12px rgba(0,0,0,0.1);
        border-top: 1px solid var(--gray-line);
        padding: 10px 0;
      }

      nav.nav-open {
        display: flex;
      }

      nav a {
        padding: 14px 32px;
        border-bottom: none;
      }

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

      .newsletter-image {
        display: none;
      }

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

      .footer-bottom-inner {
        flex-wrap: wrap;
        gap: 12px;
      }
    }