.dropdown {
    position: relative;
}
.dropdown-menu {
        z-index: 9999; /* 提升层级 */
        background: rgba(255, 255, 255, 0.98) !important; /* 不透明背景 */
        box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.1); /* 加强阴影 */
        border: none !important; /* 移除边框 */

    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all 0.3s ease;
    min-width: 200px;
    left: 0;
    margin-top: 8px;
    transition: opacity 200ms ease-out, transform 200ms ease-out;
}
.dropdown:hover .dropdown-menu,
.dropdown-menu:hover {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.dropdown-trigger::after {
    content: '›';
    display: inline-block;
    margin-left: 4px;
    transition: transform 0.2s;
}
.dropdown:hover .dropdown-trigger::after {
    content: '▼';
    transform: translateY(1px);
}
.click-menu-bg {
    --tw-bg-opacity: 0.3;
    background-color: rgb(147 197 253 / var(--tw-bg-opacity, 1));
}
nav {
    position: relative;
    z-index: 999; /* 导航栏整体层级 */
}