/* ========== 导航栏 ========== */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 70px;
      z-index: 100;
      background: #ffffff;
      backdrop-filter: blur(0px);
      border-bottom: 1px solid rgba(0, 0, 0, 0.08);
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
      padding: 0;
      transition: none;
    }

    .nav-links a {
      color: #1e2b3c !important;
      text-shadow: none !important;
      transition: all 0.2s ease;
      font-weight: 440;
    }
    .nav-links a.active {
      color: #1e4b6e !important;
      border-bottom-color: #1e4b6e;
    }

    .logo img {
      filter: drop-shadow(0 2px 4px rgba(0,0,0,0.1)) brightness(1);
    }

    .nav-phone {
      color: #044f9f;
      font-weight: 550;
      font-size: 1.3rem;
    margin-top: 12px;
      white-space: nowrap;
      margin-left: 12rem;
      padding-left: 1rem;
      border-left: 2px solid #044f9f;
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .nav-phone i {
      color: #044f9f;
      font-size: 1rem;
    }

    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0.8rem 0;
    }

    .logo {
    margin-top: 8px;
      display: flex;
      align-items: center;
      text-decoration: none;
    }

    .logo img {
      height: 50px;
      width: auto;
      transition: filter 0.3s ease;
    }

    .nav-actions {
      display: flex;
      align-items: center;
      gap: 0.9rem;
    }

    .nav-links {
      display: flex;
      gap: 1.8rem;
      list-style: none;
    }

    .nav-links a {
      text-decoration: none;
      font-size: 1.05rem;
      line-height: 1;
      margin-top: 12px; 
      height: 42px;
      padding: 0 0;
      border-bottom: 2px solid transparent;
      transition: transform 0.25s ease, border-bottom-color 0.25s ease;
      display: inline-flex;
      align-items: center;
    }

    .nav-links a:hover {
      transform: translateY(-2px);
      border-bottom-color: #1e4b6e;
      color: #1e4b6e;
    }

    .nav-item {
      position: relative;
    }

    .nav-item > a {
      display: inline-flex;
      align-items: center;
      gap: 0.25rem;
    }

    .dropdown-menu {
      position: absolute;
      top: calc(100% + 8px);
      left: 0;
      min-width: 190px;
      background: #ffffff;
      border: 1px solid rgba(0, 0, 0, 0.08);
      border-radius: 14px;
      box-shadow: 0 14px 30px rgba(0, 0, 0, 0.12);
      opacity: 0;
      visibility: hidden;
      transform: translateY(-6px);
      transition: opacity 0.18s ease, transform 0.18s ease, visibility 0.18s ease;
      z-index: 220;
      padding: 0.35rem 0;
      pointer-events: none;
    }

    .nav-item:hover > .dropdown-menu,
    .nav-item:focus-within > .dropdown-menu {
      opacity: 1;
      visibility: visible;
      transform: translateY(0);
      pointer-events: auto;
    }

    .dropdown-menu li {
      list-style: none;
    }

    .dropdown-menu a {
      display: block;
      padding: 0.6rem 1rem;
      color: #1e2b3c;
      text-decoration: none;
      white-space: nowrap;
      transition: background 0.2s ease, color 0.2s ease;
      font-size: 0.95rem;
    }

    .dropdown-menu a:hover {
      background: rgba(4, 79, 159, 0.08);
      color: #044f9f;
    }

    @media (max-width: 960px) {
      .dropdown-menu {
        position: static;
        transform: none;
        opacity: 1;
        visibility: visible;
        box-shadow: none;
        border: none;
        background: transparent;
        padding: 0;
      }

      .dropdown-menu a {
        padding: 0.5rem 0;
      }

      .nav-links {
        flex-wrap: wrap;
      }
    }
.nav-links a.active:hover {
      transform: translateY(-2px);
      border-bottom-color: #1e4b6e;
      color: #1e4b6e;
}