/* 导航栏基础样式 */
.navbar {
    background-color: #243a7e;
    width: 100%;
    height: 60px;
    display: flex;
    align-items: center;
    padding: 0;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
    position: relative;
}

.navbar-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    padding: 0 20px;
}

.navbar-logo {
    display: flex;
    align-items: center;
}

.navbar-logo img {
    height: 40px;
    margin-right: 10px;
}

.navbar-logo span {
    color: white;
    font-size: 18px;
    font-weight: bold;
}

.navbar-menu {
    display: flex;
    align-items: center;
    gap: 20px;
}

.navbar-item {
    color: white;
    text-decoration: none;
    font-size: 16px;
    padding: 0 10px;
    height: 60px;
    display: flex;
    align-items: center;
    transition: background-color 0.2s;
}

.navbar-item:hover {
    background-color: #1a2c62;
}

.navbar-item.active {
    background-color: #1a2c62;
    font-weight: bold;
}

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

.dropdown-toggle {
    cursor: pointer;
    color: white;
    display: flex;
    align-items: center;
    gap: 5px;
}

.dropdown-menu {
    position: absolute;
    top: 60px;
    left: 0;
    background-color: white;
    min-width: 200px;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    border-radius: 4px;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.3s ease;
    pointer-events: none;
}

/* 鼠标悬停显示下拉菜单 */
.dropdown:hover .dropdown-menu {
    display: block;
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    pointer-events: auto;
}

/* 下拉菜单顶部的小三角形 */
.dropdown-menu::before {
    content: '';
    position: absolute;
    top: -10px;
    left: 20px;
    border-left: 10px solid transparent;
    border-right: 10px solid transparent;
    border-bottom: 10px solid white;
}

.dropdown-item {
    color: #333 !important;
    padding: 12px 16px;
    text-decoration: none;
    display: block;
    text-align: left;
    transition: background-color 0.2s;
    border-bottom: 1px solid #f0f0f0;
}

.dropdown-item:hover {
    background-color: #f5f5f5;
}

.dropdown-item:last-child {
    border-bottom: none;
}

/* 用户下拉菜单 */
#user-dropdown .dropdown-toggle {
    color: white;
    height: 60px;
    display: flex;
    align-items: center;
    padding: 0 10px;
}

#user-dropdown .dropdown-toggle:hover {
    background-color: #1a2c62;
}

#user-dropdown .dropdown-menu {
    right: 0;
    left: auto;
    min-width: 160px;
}

#user-dropdown .dropdown-item {
    padding: 12px 16px;
    color: #333;
}

#user-dropdown .dropdown-item#logout-button {
    color: #e74c3c !important;
}

#user-dropdown .dropdown-item#logout-button:hover {
    background-color: #ffeaea;
}

/* 用户链接区域样式 */
#userLinksLoggedIn {
    position: relative;
}

#userLinksLoggedIn .dropdown-menu {
    position: absolute;
    top: 60px;
    right: 0;
    left: auto;
    background-color: white;
    min-width: 160px;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    border-radius: 4px;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.3s ease;
    pointer-events: none;
}

/* 鼠标悬停显示用户下拉菜单 */
#userLinksLoggedIn:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    pointer-events: auto;
}

/* 用户下拉菜单顶部的小三角形 */
#userLinksLoggedIn .dropdown-menu::before {
    left: auto;
    right: 20px;
}

#userLinksLoggedIn #userDisplayName {
    color: white;
    cursor: pointer;
    height: 60px;
    display: flex;
    align-items: center;
    padding: 0 10px;
}

#userLinksLoggedIn #userDisplayName:hover {
    background-color: #1a2c62;
}

#userLinksLoggedIn .dropdown-item {
    color: #333;
    padding: 12px 16px;
    text-decoration: none;
    display: block;
    border-bottom: 1px solid #f0f0f0;
}

#userLinksLoggedIn .dropdown-item:hover {
    background-color: #f5f5f5;
}

#userLinksLoggedIn #logoutButton {
    color: #e74c3c;
}

#userLinksLoggedIn #logoutButton:hover {
    background-color: #ffeaea;
}

/* 登录注册链接 */
#userLinksGuest {
    display: flex;
    height: 60px;
}

#userLinksGuest a {
    color: white;
    text-decoration: none;
    padding: 0 10px;
    display: flex;
    align-items: center;
    height: 100%;
}

#userLinksGuest a:hover {
    background-color: #1a2c62;
}

/* 语言选择器 */
.language-dropdown {
    position: relative;
}

.language-switch {
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 5px;
    height: 60px;
    padding: 0 10px;
}

.language-switch:hover {
    background-color: #1a2c62;
}

.language-menu {
    position: absolute;
    top: 60px;
    right: 0;
    background-color: white;
    min-width: 160px;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    border-radius: 4px;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.3s ease;
    pointer-events: none;
}

/* 鼠标悬停显示语言下拉菜单 */
.language-dropdown:hover .language-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    pointer-events: auto;
}

/* 语言下拉菜单顶部的小三角形 */
.language-menu::before {
    content: '';
    position: absolute;
    top: -10px;
    right: 20px;
    border-left: 10px solid transparent;
    border-right: 10px solid transparent;
    border-bottom: 10px solid white;
}

.language-option {
    color: #333;
    padding: 12px 16px;
    text-decoration: none;
    display: block;
    transition: background-color 0.2s;
    border-bottom: 1px solid #f0f0f0;
}

.language-option:hover {
    background-color: #f5f5f5;
}

.language-option.active {
    font-weight: bold;
    color: #007bff;
}

/* 消息样式 */
.message-container {
    position: fixed;
    top: 70px;
    right: 20px;
    max-width: 350px;
    z-index: 9999;
}

.message {
    margin-bottom: 10px;
    padding: 12px 20px;
    border-radius: 4px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    position: relative;
    animation: fadeIn 0.3s ease;
    color: white;
}

.message-success {
    background-color: #4CAF50;
}

.message-error {
    background-color: #f44336;
}

.message-info {
    background-color: #2196F3;
}

.message-close {
    position: absolute;
    top: 8px;
    right: 10px;
    cursor: pointer;
    font-size: 18px;
    opacity: 0.7;
}

.message-close:hover {
    opacity: 1;
}

.fade-out {
    animation: fadeOut 0.5s ease forwards;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeOut {
    from { opacity: 1; transform: translateY(0); }
    to { opacity: 0; transform: translateY(-10px); }
}

@media (max-width: 768px) {
    .navbar-menu {
        flex-wrap: wrap;
        gap: 5px;
    }
    
    .navbar-item {
        font-size: 14px;
        padding: 0 5px;
    }
}