/* 头部导航 */
.header {
    position: sticky;
    top: 0;
    height: var(--header-height);
    backdrop-filter: blur(var(--blur-amount));
    background: rgba(242, 242, 247, 0.8);
    border-bottom: 0.5px solid rgba(0, 0, 0, 0.1);
    z-index: 100;
    padding: 0 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: var(--transition);
}

.dark-mode .header {
    background: rgba(28, 28, 30, 0.8);
    border-bottom: 0.5px solid rgba(255, 255, 255, 0.1);
}

.header-title {
    font-size: 20px;
    font-weight: 600;
    letter-spacing: -0.5px;
}

/* 头部布局优化 */
.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: relative;
    width: 100%;
    flex-wrap: wrap; /* 支持小屏幕自动换行 */
}

.header-center {
    flex-grow: 1;
    text-align: center;
}

.header-actions {
    display: flex;
    gap: 20px;
}

/* 会员头像样式 */
.user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    overflow: hidden;
    background: var(--card-bg-light);
    backdrop-filter: blur(var(--blur-amount));
    box-shadow: var(--card-shadow);
    padding: 0;
    transition: var(--transition);
}

.user-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
}

/* 暗黑模式适配 */
.dark-mode .user-avatar {
    background: var(--card-bg-dark);
}

/* 悬停效果 */
@media (hover: hover) {
    .user-avatar:hover {
        transform: scale(1.1);
        box-shadow: 0 8px 16px rgba(10, 132, 255, 0.2);
    }
}

/* Logo样式 */
.logo-link {
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    z-index: 100;
    transition: var(--transition);
}

.logo-image {
    width: 90px;
    height: 60px;
    padding: 3px;
    transition: var(--transition);
}

/* 暗黑模式适配 */
.dark-mode .logo-image {
    background: var(--card-bg-dark);
}

/* 悬停效果 */
@media (hover: hover) {
    .logo-link:hover .logo-image {
        transform: scale(1.1) translateY(-50%);
        box-shadow: 0 8px 16px rgba(10, 132, 255, 0.2);
    }
}

/* 响应式调整 */
@media (max-width: 768px) {
    .logo-image {
        width: 90px;
        height: 60px;
        padding: 3px;
    }
}