/* 下拉菜单样式 - 适配 Fluid 主题 */
.navbar .nav-item.dropdown {
    position: relative;
}

.navbar .nav-item.dropdown > .nav-link {
    cursor: pointer;
    position: relative;
}

.navbar .nav-item.dropdown .dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 180px;
    max-width: 250px;
    background: var(--board-color, #fff);
    background-color: var(--board-color, #fff);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    border-radius: 6px;
    padding: 6px 0;
    margin-top: 0;
    padding-top: 8px;
    z-index: 1050;
    list-style: none;
    border: none;
}

/* 在下拉菜单上方添加一个不可见的连接区域，让鼠标移动更顺畅 */
.navbar .nav-item.dropdown .dropdown-menu::after {
    content: '';
    position: absolute;
    top: -8px;
    left: 0;
    right: 0;
    height: 8px;
    background: transparent;
}

[data-theme="dark"] .navbar .nav-item.dropdown .dropdown-menu,
html[data-user-color-scheme="dark"] .navbar .nav-item.dropdown .dropdown-menu {
    background: var(--board-color-dark, #252d38);
    background-color: var(--board-color-dark, #252d38);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
}

.navbar .nav-item.dropdown .dropdown-menu::before {
    content: '';
    position: absolute;
    top: -6px;
    left: 20px;
    width: 0;
    height: 0;
    border-left: 6px solid transparent;
    border-right: 6px solid transparent;
    border-bottom: 6px solid var(--board-color, #fff);
    z-index: 1;
}

[data-theme="dark"] .navbar .nav-item.dropdown .dropdown-menu::before,
html[data-user-color-scheme="dark"] .navbar .nav-item.dropdown .dropdown-menu::before {
    border-bottom-color: var(--board-color-dark, #252d38);
}

.navbar .nav-item.dropdown .dropdown-menu li {
    margin: 0;
    padding: 0;
    list-style: none;
    display: block;
}

.navbar .nav-item.dropdown .dropdown-menu .dropdown-item {
    display: block;
    padding: 10px 20px;
    color: var(--text-color, #3c4858);
    text-decoration: none;
    transition: background-color 0.2s ease, color 0.2s ease;
    white-space: nowrap;
    font-size: 14px;
    line-height: 1.5;
    border: none;
}

[data-theme="dark"] .navbar .nav-item.dropdown .dropdown-menu .dropdown-item,
html[data-user-color-scheme="dark"] .navbar .nav-item.dropdown .dropdown-menu .dropdown-item {
    color: var(--text-color-dark, #c4c6c9);
}

.navbar .nav-item.dropdown .dropdown-menu .dropdown-item:hover {
    background-color: rgba(0, 0, 0, 0.05);
    color: var(--theme-color, #49b1f5);
}

[data-theme="dark"] .navbar .nav-item.dropdown .dropdown-menu .dropdown-item:hover,
html[data-user-color-scheme="dark"] .navbar .nav-item.dropdown .dropdown-menu .dropdown-item:hover {
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--theme-color, #49b1f5);
}

.navbar .nav-item.dropdown.active > .nav-link {
    color: var(--theme-color, #49b1f5) !important;
}

/* 确保下拉菜单在导航栏上方，不影响其他元素 */
.navbar .nav-item.dropdown {
    z-index: auto;
}

/* 隐藏可能的异常字符 */
.header-inner::before,
.banner::before,
#banner::before {
    content: none !important;
    display: none !important;
}

/* 确保背景图片从顶部开始 */
.banner,
#banner {
    background-position: top center !important;
    background-attachment: scroll !important;
}

/* 响应式设计 */
@media (max-width: 991px) {
    .navbar .nav-item.dropdown .dropdown-menu {
        position: static;
        box-shadow: none;
        margin-top: 0;
        border-radius: 0;
        background: transparent;
        display: block !important;
        min-width: auto;
        max-width: none;
    }
    
    [data-theme="dark"] .navbar .nav-item.dropdown .dropdown-menu,
    html[data-user-color-scheme="dark"] .navbar .nav-item.dropdown .dropdown-menu {
        background: transparent;
    }
    
    .navbar .nav-item.dropdown .dropdown-menu::before {
        display: none;
    }
    
    .navbar .nav-item.dropdown .dropdown-menu .dropdown-item {
        padding-left: 40px;
        padding-top: 8px;
        padding-bottom: 8px;
    }
}