/* ========== Header 导航栏样式 ========== */

/* ===== 基础导航栏样式 ===== */
.header .navbar {
    background: rgba(255, 255, 255, 0.95) !important;
    backdrop-filter: blur(10px);
    border-bottom: 1px solid #e2e8f0;
    transition: all 0.3s ease;
    padding: 1rem 0;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.header .navbar-brand img {
    width: 120px;
    height: 120px;
    transition: all 0.3s ease;
}

.header .navbar-brand:hover img {
    transform: scale(1.05);
}

/* ===== 导航链接样式 ===== */
.header .navbar-nav .nav-link {
    color: #475569 !important;
    font-weight: 500;
    margin: 0 0.5rem;
    transition: all 0.3s ease;
    position: relative;
}

.header .navbar-nav .nav-link:hover,
.header .navbar-nav .nav-link.active {
    color: #2563EB !important;
}

.header .navbar-nav .nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 50%;
    width: 0;
    height: 2px;
    background: #2563EB;
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

.header .navbar-nav .nav-link:hover::after,
.header .navbar-nav .nav-link.active::after {
    width: 100%;
}

/* ===== Logo 样式 ===== */
.header .logo-placeholder {
    width: 60px;
    height: 40px;
    background: linear-gradient(45deg, #2563EB, #059669);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 1.2rem;
    letter-spacing: 1px;
    transition: all 0.3s ease;
}

.header .logo-placeholder:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

/* ===== 登录按钮样式 ===== */
.header .login-btn {
    background: transparent;
    color: #2563EB !important;
    border: 1px solid #2563EB;
    border-radius: 6px;
    padding: 0.5rem 1rem !important;
    margin-left: 1rem;
    font-weight: 500;
    transition: all 0.3s ease;
    text-decoration: none;
}

.header .navbar-nav .login-btn:hover {
    background: #2563EB !important;
    color: white !important;
    border-color: #2563EB;
    text-decoration: none;
}

.header .login-btn::after {
    display: none;
}

/* ===== 用户菜单样式 ===== */
.header .user-menu {
    position: relative;
    margin-left: 1rem;
}

.header .user-info {
    display: flex;
    align-items: center;
    padding: 0.5rem 1rem;
    background: transparent;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s ease;
    color: #475569;
    font-weight: 500;
}

.header .user-info:hover {
    background: #f8f9fa;
    color: #2563EB;
}

.header .user-name {
    margin-right: 0.5rem;
    font-size: 0.95rem;
}

.header .user-info i {
    font-size: 0.75rem;
    transition: transform 0.3s ease;
    opacity: 0.7;
}

.header .user-menu:hover .user-info i {
    transform: rotate(180deg);
}

.header .user-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    background: white;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
    min-width: 160px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 1000;
    margin-top: 0;
    padding-top: 0.5rem;
}

.header .user-menu:hover .user-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

/* 创建一个不可见的连接区域来防止hover中断 */
.header .user-dropdown::before {
    content: '';
    position: absolute;
    top: -0.5rem;
    left: 0;
    right: 0;
    height: 0.5rem;
    background: transparent;
}

.header .dropdown-item {
    display: flex;
    align-items: center;
    padding: 0.75rem 1rem;
    color: #475569;
    text-decoration: none;
    transition: all 0.3s ease;
    border-bottom: 1px solid #f1f5f9;
    font-size: 0.9rem;
}

.header .dropdown-item:first-child {
    border-radius: 8px 8px 0 0;
}

.header .dropdown-item:last-child {
    border-bottom: none;
    border-radius: 0 0 8px 8px;
}

.header .dropdown-item:hover {
    background: #f8f9fa;
    color: #2563EB;
    text-decoration: none;
}

.header .dropdown-item i {
    font-size: 0.85rem;
    width: 16px;
    opacity: 0.8;
}

/* ===== 导航栏滚动效果 ===== */
.header .navbar.scrolled {
    background: rgba(255, 255, 255, 0.98) !important;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

/* ===== 移动端导航栏固定 ===== */
@media (max-width: 991.98px) {
    .header .navbar {
        position: fixed !important;
        top: 0;
        left: 0;
        right: 0;
        z-index: 1030;
        background: rgba(255, 255, 255, 0.95) !important;
        backdrop-filter: blur(10px);
        transform: translateY(0) !important;
    }
}

/* ===== 移动端导航样式 ===== */
@media (max-width: 991.98px) {
    .header .navbar-collapse {
        background: rgba(255, 255, 255, 0.98);
        border-radius: 8px;
        margin-top: 1rem;
        padding: 1rem;
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        max-height: 80vh;
        overflow-y: hidden;
        -webkit-overflow-scrolling: touch;
    }
    
    .header .navbar-collapse.show {
        overflow-y: auto;
    }
    
    .header .navbar-nav {
        text-align: center;
    }
    
    .header .navbar-nav .nav-item {
        margin: 0.5rem 0;
    }
    
    .header .login-btn {
        margin-left: 0;
        margin-top: 1rem;
        display: inline-block;
        text-align: center;
    }
    
    .header .user-menu {
        margin-left: 0;
        margin-top: 1rem;
        text-align: center;
    }
    
    .header .user-info {
        justify-content: center;
        padding: 0.75rem 1rem;
        background: #f8f9fa;
        border-radius: 8px;
        margin-bottom: 0.5rem;
    }
    
    .header .user-dropdown {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        border: none;
        background: transparent;
        margin-top: 0;
        min-width: auto;
    }
    
    .header .dropdown-item {
        padding: 0.75rem 1rem;
        border-bottom: 1px solid #e2e8f0;
        justify-content: center;
        background: #f8f9fa;
        margin-bottom: 0.25rem;
        border-radius: 6px;
    }
    
    .header .dropdown-item:last-child {
        border-bottom: none;
        margin-bottom: 0;
    }
    
    .header .dropdown-item:hover {
        background: #e9ecef;
    }
}

/* ===== 移动端折叠按钮样式 ===== */
.header .navbar-toggler {
    border: 1px solid #e2e8f0;
    padding: 0.25rem 0.5rem;
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.9);
}

.header .navbar-toggler:focus {
    box-shadow: none;
    outline: none;
}

.header .navbar-toggler-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%2833, 37, 41, 0.75%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}