/* 统一头部导航样式 */
.site-header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 0;
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 12px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* Logo区域 */
.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: #1d1d1f;
    font-weight: 700;
    font-size: 20px;
    transition: color 0.3s ease;
}

.logo:hover {
    color: #007AFF;
}

.logo-icon {
    width: 32px;
    height: 32px;
    margin-right: 8px;
    background: linear-gradient(135deg, #007AFF 0%, #5856D6 100%);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 16px;
}

/* 主导航 */
.main-nav {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-link {
    padding: 8px 16px;
    text-decoration: none;
    color: #1d1d1f;
    font-size: 15px;
    font-weight: 500;
    border-radius: 8px;
    transition: all 0.3s ease;
    position: relative;
}

.nav-link:hover {
    background: rgba(0, 122, 255, 0.1);
    color: #007AFF;
}

.nav-link.active {
    background: #007AFF;
    color: white;
}

/* 移动端菜单按钮 */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    padding: 8px;
    cursor: pointer;
    border-radius: 8px;
    transition: background 0.3s ease;
}

.mobile-menu-btn:hover {
    background: rgba(0, 0, 0, 0.05);
}

.mobile-menu-btn svg {
    width: 24px;
    height: 24px;
    fill: #1d1d1f;
}

/* 移动端导航 */
.mobile-nav {
    display: none;
    background: white;
    border-top: 1px solid rgba(0, 0, 0, 0.05);
    padding: 16px 20px;
}

.mobile-nav.active {
    display: block;
}

.mobile-nav .nav-link {
    display: block;
    padding: 12px 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    border-radius: 0;
}

.mobile-nav .nav-link:last-child {
    border-bottom: none;
}

/* 面包屑导航 */
.breadcrumb {
    background: #f8f9fa;
    padding: 12px 20px;
    font-size: 14px;
    color: #5f6368;
    border-bottom: 1px solid #e8eaed;
}

.breadcrumb-container {
    max-width: 1200px;
    margin: 0 auto;
}

.breadcrumb a {
    color: #1a73e8;
    text-decoration: none;
    transition: color 0.3s ease;
}

.breadcrumb a:hover {
    color: #007AFF;
    text-decoration: underline;
}

.breadcrumb-separator {
    margin: 0 8px;
    color: #dadce0;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .main-nav {
        display: none;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .header-container {
        padding: 12px 16px;
    }
    
    .logo {
        font-size: 18px;
    }
    
    .logo-icon {
        width: 28px;
        height: 28px;
        font-size: 14px;
    }
    
    .breadcrumb {
        padding: 10px 16px;
        font-size: 13px;
    }
}

@media (max-width: 480px) {
    .header-container {
        padding: 10px 12px;
    }
    
    .logo {
        font-size: 16px;
    }
    
    .logo-icon {
        width: 24px;
        height: 24px;
        font-size: 12px;
        margin-right: 6px;
    }
    
    .breadcrumb {
        padding: 8px 12px;
        font-size: 12px;
    }
}