.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    /* background: rgba(255, 255, 255, 0.5); 半透明背景 */
    backdrop-filter: blur(10px); /* 毛玻璃效果 */
    display: flex;
    justify-content: center;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3); /* 添加阴影 */
    z-index: 3000; /* 确保浮在其他内容之上 */
}

.dropdown-menu {
    /* background: linear-gradient(45deg, #f3d170cc, #c8d4a2f5); */
    background: linear-gradient(45deg, #f3d170, #c8d4a2);
}

.dropdown-item:hover {
    background: #ffffff80 !important;
}