body {
    background-color: #ffffff;
    padding-top: 65px;
}
.navbar {
    background: #ffffff;
    height: 65px;
    box-shadow: 0px 4px 4px 0px #0000000D;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
}
.navbar-brand {
    font-weight: bold;
    font-size: 24px;
    color: #000000;
    display: flex;
    align-items: center;
    gap: 10px;
}

.navbar-logo {
    width: 48px;
    height: 48px;
    object-fit: contain;
}

.navbar-brand:hover {
    font-weight: bold;
    font-size: 24px;
    color: #000000;
}

.ai-nav-link {
    color: #848484;
    margin: 0 10px;
    font-size: 18px;
    text-decoration: none;
    padding: 5px 15px;
    position: relative;
    display: inline-block;
    transition: color 0.2s ease;
}
.ai-nav-link:hover {
    color: #1970FF;
}
.ai-nav-link.active {
    color: #1970FF !important;
    font-weight: bold;
    background-color: rgba(25, 112, 255, 0.1);
    border-radius: 5px;
}
.user-dropdown {
    cursor: pointer;
}

/* 通知图标样式 */
.btn-link {
    color: #000000 !important;
}

.btn-link:hover {
    color: #1970FF !important;
}

/* 用户名下拉菜单样式 */
.dropdown-toggle {
    color: #000000 !important;
}

.dropdown-toggle:hover {
    color: #1970FF !important;
}

/* 下拉菜单样式 */
.dropdown-menu {
    border: 1px solid #E5E5E5;
    border-radius: 8px;
    box-shadow: 0px 4px 12px rgba(0, 0, 0, 0.1);
}

.dropdown-item {
    color: #333333;
    padding: 10px 16px;
}

.dropdown-item:hover {
    background-color: #F5F5F5;
    color: #1970FF;
}


.nav-links {
    display: flex;
    gap: 30px;
    list-style: none;
}

.nav-links a {
    text-decoration: none;
    color: #555;
    font-weight: 500;
    position: relative;
    transition: color 0.3s ease;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, #667eea, #764ba2);
    transition: width 0.3s ease;
}

.nav-links a:hover {
    color: #667eea;
}

.nav-links a:hover::after {
    width: 100%;
}