/* ===== Navigation - Premium Minimalist ===== */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      z-index: 1000;
      height: 76px;
      display: flex;
      align-items: center;
      background: rgba(255, 255, 255, 0.72);
      backdrop-filter: saturate(180%) blur(20px);
      -webkit-backdrop-filter: saturate(180%) blur(20px);
      border-bottom: 1px solid rgba(0, 0, 0, 0.06);
      transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .navbar.scrolled {
      height: 64px;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: saturate(180%) blur(16px);
      -webkit-backdrop-filter: saturate(180%) blur(16px);
      box-shadow: 0 1px 0 rgba(0,0,0,0.04), 0 8px 24px -12px rgba(10, 77, 162, 0.08);
    }
    .navbar-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 100%;
    }
    .nav-logo {
      display: flex;
      align-items: center;
      flex-shrink: 0;
      transition: transform 0.3s ease;
    }
    .nav-logo:hover {
      transform: translateY(-1px);
    }
    .nav-logo-img {
      height: 40px;
      width: auto;
      object-fit: contain;
      display: block;
      transition: height 0.3s ease;
    }
    .navbar.scrolled .nav-logo-img {
      height: 34px;
    }
    .nav-menu {
      display: flex;
      align-items: center;
      gap: 2px;
      list-style: none;
      margin: 0;
      padding: 0;
    }
    .nav-item {
      position: relative;
    }
    .nav-link {
      display: flex;
      align-items: center;
      gap: 5px;
      padding: 8px 16px;
      font-size: 14px;
      font-weight: 500;
      color: var(--color-gray-700);
      border-radius: 8px;
      transition: color 0.25s ease;
      cursor: pointer;
      position: relative;
    }
    .nav-link:hover {
      color: var(--cxj-primary);
    }
    .nav-link.active {
      color: var(--cxj-primary);
      font-weight: 600;
    }
    .nav-link-caret {
      width: 0;
      height: 0;
      border-left: 4px solid transparent;
      border-right: 4px solid transparent;
      border-top: 4px solid currentColor;
      opacity: 0.5;
      transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.25s ease;
      margin-top: 2px;
    }
    .nav-item.has-dropdown:hover .nav-link-caret {
      transform: rotate(180deg);
      opacity: 1;
    }

    /* ===== Mega Menu - Ultra Premium Minimalist ===== */
    .nav-mega {
      position: absolute;
      top: calc(100% + 10px);
      left: 50%;
      transform: translateX(-50%) translateY(8px);
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: saturate(180%) blur(24px);
      -webkit-backdrop-filter: saturate(180%) blur(24px);
      border-radius: 16px;
      box-shadow: 
        0 1px 0 rgba(0, 0, 0, 0.03),
        0 8px 24px -12px rgba(10, 77, 162, 0.08),
        0 24px 48px -20px rgba(10, 77, 162, 0.10),
        0 0 0 1px rgba(0, 0, 0, 0.04);
      padding: 20px;
      opacity: 0;
      visibility: hidden;
      transition: 
        opacity 0.25s cubic-bezier(0.4, 0, 0.2, 1),
        transform 0.35s cubic-bezier(0.22, 1, 0.36, 1),
        visibility 0.25s;
      pointer-events: none;
    }
    /* 透明桥梁：消除导航栏与菜单之间的hover间隙 */
    .nav-mega::before {
      content: '';
      position: absolute;
      top: -14px;
      left: 0;
      right: 0;
      height: 18px;
      background: transparent;
      pointer-events: auto;
    }
    .nav-item.has-dropdown:hover .nav-mega {
      opacity: 1;
      visibility: visible;
      transform: translateX(-50%) translateY(0);
      pointer-events: auto;
    }

    /* Small Mega (About Us) */
    .nav-mega--sm {
      min-width: 540px;
      padding: 18px;
    }
    .nav-mega-list {
      list-style: none;
      margin: 0;
      padding: 0;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 2px;
    }
    .nav-mega-link {
      display: flex;
      align-items: flex-start;
      gap: 14px;
      padding: 12px 14px;
      border-radius: 10px;
      transition: all 0.25s cubic-bezier(0.22, 1, 0.36, 1);
      color: inherit;
      position: relative;
    }
    .nav-mega-link:hover {
      background: rgba(10, 77, 162, 0.04);
    }
    .nav-mega-icon {
      width: 32px;
      height: 32px;
      flex-shrink: 0;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 13px;
      color: #0A4DA2;
      background: transparent;
      border: 1px solid rgba(10, 77, 162, 0.12);
      border-radius: 8px;
      transition: all 0.25s cubic-bezier(0.22, 1, 0.36, 1);
    }
    .nav-mega-link:hover .nav-mega-icon {
      background: #0A4DA2;
      border-color: #0A4DA2;
      color: #fff;
      transform: scale(1.05);
    }
    .nav-mega-title {
      font-size: 13.5px;
      font-weight: 500;
      color: #1e293b;
      line-height: 1.4;
      margin-bottom: 3px;
      transition: color 0.25s ease;
      letter-spacing: -0.01em;
    }
    .nav-mega-link:hover .nav-mega-title {
      color: #0A4DA2;
      font-weight: 600;
    }
    .nav-mega-desc {
      font-size: 11.5px;
      color: #94a3b8;
      line-height: 1.5;
      font-weight: 400;
    }

    /* Wide Mega (Products) */
    .nav-mega--wide {
      min-width: 1060px;
      max-width: calc(100vw - 40px);
      padding: 18px;
    }
    .nav-mega-inner {
      display: grid;
      gap: 0;
    }
    .nav-mega--wide .nav-mega-inner {
      display: flex;
      gap: 0;
      align-items: stretch;
    }
    .nav-mega-scroll {
      flex: 1 1 auto;
      display: flex;
      gap: 0 18px;
      align-items: flex-start;
      padding-right: 14px;
      max-height: 72vh;
      overflow-y: auto;
    }
    .nav-mega-scroll::-webkit-scrollbar { width: 6px; }
    .nav-mega-scroll::-webkit-scrollbar-track { background: transparent; }
    .nav-mega-scroll::-webkit-scrollbar-thumb { background: rgba(10, 77, 162, 0.18); border-radius: 3px; }
    .nav-mega-col {
      flex: 1 1 0;
      min-width: 180px;
      display: flex;
      flex-direction: column;
      padding: 2px 12px 6px 4px;
      border-right: 1px solid rgba(226, 232, 240, 0.7);
    }
    .nav-mega-scroll .nav-mega-col:last-child {
      border-right: none;
    }
    .nav-mega-category {
      display: block;
      font-size: 13px;
      font-weight: 600;
      color: #0f172a;
      line-height: 1.4;
      letter-spacing: 0.02em;
      margin: 0 0 8px 4px;
      padding: 0;
      position: relative;
      transition: color 0.2s ease;
    }
    .nav-mega-category:hover {
      color: #0A4DA2;
    }
    .nav-mega-category::after {
      content: '';
      display: block;
      width: 20px;
      height: 1.5px;
      background: linear-gradient(90deg, #0A4DA2 0%, transparent 100%);
      margin-top: 8px;
      border-radius: 1px;
      opacity: 0.4;
    }
    .nav-mega-sublist {
      list-style: none;
      margin: 0;
      padding: 0;
      display: flex;
      flex-direction: column;
      gap: 0;
    }
    .nav-mega-sublist > li {
      position: relative;
    }
    .nav-mega-sublist > li > a {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 7px 10px 6px 12px;
      font-size: 12.5px;
      font-weight: 500;
      color: #1e293b;
      border-radius: 6px;
      transition: all 0.2s cubic-bezier(0.22, 1, 0.36, 1);
      position: relative;
    }
    .nav-mega-sublist > li > a::before {
      content: '';
      position: absolute;
      left: 0;
      top: 50%;
      transform: translateY(-50%) scaleY(0);
      width: 2px;
      height: 12px;
      background: linear-gradient(180deg, #0A4DA2 0%, #2563eb 100%);
      border-radius: 1px;
      transition: transform 0.25s cubic-bezier(0.22, 1, 0.36, 1);
      opacity: 0;
    }
    .nav-mega-sublist > li:hover > a {
      color: #0A4DA2;
      background: rgba(10, 77, 162, 0.04);
      padding-left: 16px;
    }
    .nav-mega-sublist > li:hover > a::before {
      transform: translateY(-50%) scaleY(1);
      opacity: 1;
    }
    .nav-mega-sublist > li > a::after {
      content: '';
      width: 4px;
      height: 4px;
      border-top: 1.5px solid #cbd5e1;
      border-right: 1.5px solid #cbd5e1;
      transform: rotate(45deg);
      transition: all 0.2s cubic-bezier(0.22, 1, 0.36, 1);
      opacity: 0;
      margin-right: 2px;
      display: none;
    }
    .nav-mega-sublist > li:has(.nav-submenu) > a::after {
      opacity: 0.5;
    }
    .nav-mega-sublist > li:hover > a::after {
      border-color: #0A4DA2;
      transform: translateX(3px) rotate(45deg);
      opacity: 1;
    }

    /* ===== 3rd Level Submenu ===== */
    .nav-submenu {
      display: grid;
      grid-template-columns: 1fr;
      gap: 2px 0;
      padding: 1px 0 2px 0;
      margin-top: 2px;
      margin-left: 0;
      border-left: none;
    }
    .nav-submenu::before {
      display: none;
    }
    .nav-submenu a {
      display: block;
      padding: 5px 8px 5px 14px;
      font-size: 11.5px;
      font-weight: 400;
      color: #64748b;
      border-radius: 5px;
      transition: all 0.2s cubic-bezier(0.22, 1, 0.36, 1);
      position: relative;
      line-height: 1.4;
      letter-spacing: 0.01em;
    }
    .nav-submenu a:hover {
      background: rgba(10, 77, 162, 0.06);
      color: #0A4DA2;
      font-weight: 500;
    }
    .nav-submenu a::before {
      content: '';
      position: absolute;
      left: 5px;
      top: 50%;
      width: 3px;
      height: 3px;
      background: #cbd5e1;
      border-radius: 50%;
      transform: translateY(-50%);
      transition: all 0.2s cubic-bezier(0.22, 1, 0.36, 1);
    }
    .nav-submenu a:hover::before {
      background: #0A4DA2;
      transform: translateY(-50%) scale(1.3);
    }

    /* Feature column */
    .nav-mega-col--feature {
      flex: 0 0 240px;
      border-right: none;
      border-left: 1px solid rgba(226, 232, 240, 0.7);
      padding-left: 20px;
      padding-right: 4px;
    }
    .nav-mega-feature {
      height: 100%;
      display: flex;
      flex-direction: column;
      justify-content: flex-end;
      background: linear-gradient(180deg, rgba(10,77,162,0) 0%, rgba(10,77,162,0.75) 100%), url('../assets/common/custom-service-bg.webp');
      background-size: cover;
      background-position: center;
      border-radius: 12px;
      padding: 20px;
      position: relative;
      overflow: hidden;
      border: 1px solid rgba(226, 232, 240, 0.8);
    }
    .nav-mega-feature::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background: linear-gradient(180deg, rgba(255,255,255,0.1) 0%, rgba(10,77,162,0.85) 100%);
      z-index: 0;
    }
    .nav-mega-feature > * {
      position: relative;
      z-index: 1;
    }
    .nav-mega-feature h4,
    .nav-mega-feature p {
      color: #fff;
    }
    .nav-mega-feature p {
      opacity: 0.9;
    }
    .nav-mega-feature-badge {
      background: rgba(255,255,255,0.2) !important;
      color: #fff !important;
      backdrop-filter: blur(10px);
    }
    .nav-mega-cta {
      color: #fff !important;
    }
    .nav-mega-cta svg {
      stroke: #fff;
    }
    .nav-mega-feature-badge {
      display: inline-block;
      padding: 3px 10px;
      font-size: 10px;
      font-weight: 600;
      color: #fff;
      background: rgba(255, 255, 255, 0.2);
      backdrop-filter: blur(10px);
      border-radius: 4px;
      letter-spacing: 0.03em;
      margin-bottom: 12px;
      width: fit-content;
    }
    .nav-mega-feature h4 {
      font-size: 15px;
      font-weight: 600;
      color: #fff;
      margin: 0 0 8px 0;
      letter-spacing: -0.01em;
    }
    .nav-mega-feature p {
      font-size: 12px;
      color: rgba(255, 255, 255, 0.9);
      line-height: 1.6;
      margin: 0 0 16px 0;
    }
    .nav-mega-cta {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-size: 12.5px;
      font-weight: 500;
      color: #fff;
      transition: all 0.25s cubic-bezier(0.22, 1, 0.36, 1);
      width: fit-content;
    }
    .nav-mega-cta:hover {
      gap: 10px;
      color: #fff;
    }
    .nav-mega-cta svg {
      stroke: #fff;
    }