/* 2. 头部样式 */
        header {
            width: 100%;
            height: 6.67vh;
            display: flex;
            position: fixed;
            top: 0;
            left: 0;
            align-items: center;
            justify-content: space-between;
            border-bottom: 1px solid rgba(255, 255, 255, 0.15);
            z-index: 9999;
            background-color: rgba(255, 255, 255, 0);
            transition: background-color 0.3s ease;
        }

        /* 3. 导航栏样式 */
        nav {
            display: flex;
            align-items: center;
            height: 100%;
            width: 100%;
        }

        /* 4. Logo区域样式 */
        header .logo {
            display: flex;
            align-items: center;
            justify-content: center;
            height: 100%;
            padding-left: 3.125%;
        }

        header .logos {
            height: 50%;
            width: auto;
            max-height: 100%;
            display: block;
            overflow: hidden;
            position: relative;
            transition: height 0.3s ease;
        }

        header .logos img {
            width: auto;
            max-height: 100%;
            height: auto;
            object-fit: contain;
        }

        /* 5. 菜单容器样式 */
        .menu-container {
            width: 40%;
            margin-left: auto;
            display: flex;
            justify-content: flex-start;
            align-items: center;
            height: 100%;
        }

        .menu-container .menu {
            display: flex;
            list-style: none;
            margin: 0;
            padding: 0;
            height: 100%;
            width: 100%;
        }

        .menu-container .menu li {
            text-align: center;
            width: 16%;
            height: 100%;
            display: flex;
            justify-content: center;
            align-items: center;
            margin: 0 2%;
        }

        .menu-container .menu li a {
            text-decoration: none;
            color: #fff;
            font-size: 1rem;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            height: 100%;
            display: flex;
            justify-content: center;
            align-items: center;
            transition: color 0.3s ease;
        }

        .menu-container .menu li.active {
            height: 100%;
            background-repeat: no-repeat;
            background-size: contain;
            background-position: bottom;
            display: flex;
            justify-content: center;
            align-items: center;
            background-size: 100% 2px;
        }

        /* 6. 下拉菜单样式 */
        .has-dropdown {
            position: relative;
        }

        .dropdown-menu {
            display: none;
            position: absolute;
            background-color: white;
            z-index: 999;
            left: 50%; /* 先定位到中间 */
            top: 100%;
            transform: translateX(-50%); /* 再向左移动自身宽度的一半 */
            transition: opacity 0.3s ease, visibility 0.3s ease;
            width: 100%;
            opacity: 0;
            visibility: hidden;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
            color: #333;
            list-style: none;
        }
         .dropdown-menu li {
            list-style: none;
            padding: 12px 0;
          width: 100% !important;
        }

         .dropdown-menu li a {
            color: #888 !important;;
            font-size: 1.2rem !important;;
        }

        .dropdown-menu.show {
            display: block;
            opacity: 1;
            visibility: visible;
            width: 200px;
            padding-left: 0px;
        }

        .has-dropdown:hover .dropdown-menu {
            display: block;
        }

        .has-dropdown a img {
            width: 12px;
            height: 12px;
             /*padding: 0 2px; */
        }

        /* 7. 电话区域样式 */
        .calls {
            display: flex;
            width: auto;
            height: 100%;
            padding: 0 1%;
            border-left: 1px solid rgba(255, 255, 255, 0.15);
            flex-wrap: nowrap;
            align-items: center;
        }

        .calls img {
            width: 24px;
            height:  24px;
            max-width: 100%;
            display: inline-block;
        }

        .calls span {
            font-size: 1rem;
            color: #fff;
            white-space: nowrap;
            overflow: hidden;
            transition: color 0.3s ease;
        }

        /* 8. 滚动效果样式 */
        header.scrolled {
            background-color: rgba(255, 255, 255, 1);
        }

        header.scrolled .menu-container a {
            color: #333 !important;
        }

        header.scrolled .calls span {
            color: #333 !important;
        }

        /* 9. 响应式设计 */
        @media screen and (max-width: 480px) {
            .logos {
                height: 40%;
            }
            .calls {
                gap: 2%;
            }
            .calls img {
                width: 14px;
            }
            .calls span {
                font-size: 0.75rem;
            }
        }

        @media screen and (max-width: 384px) {
            .logos {
                height: 35%;
            }
        }

        @media screen and (max-width: 768px) {
            header {
                height: 10vh;
            }
            nav a {
                font-size: 1.5rem;
            }
            .calls span {
                font-size: 1.5rem;
            }
            nav ul {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 72px;
                left: 0;
                width: 100%;
                background-color: rgba(255, 255, 255, 0.95);
            }
            nav ul li {
                text-align: left;
                padding: 10px 20px;
            }
            .calls {
                gap: 4%;
            }
            .calls img {
                width: 16px;
            }
            .calls span {
                font-size: 0.875rem;
            }
        }

        @media screen and (min-width: 1920px) {
            header {
                height: 8vh;
            }
            nav a {
                font-size: 1.8rem;
            }
        }