.stack-app .filter-bar {
            text-align: center;
            margin-bottom: 3.2rem;
            display: flex;
            gap: 10px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .stack-app .filter-btn {
            background-color: var(--card-background);
            border: none;
            padding: 8px 16px;
            border-radius: var(--card-border-radius);
            cursor: pointer;
            font-size: 1.44rem;
            transition: all 0.3s ease;
        }
        .stack-app .filter-btn:hover {
            background-color: var(--card-background);
            color: inherit;
        }
        .stack-app .filter-btn.active {
            background-color: var(--card-background);
            color: inherit;
        }
        /* 覆盖一些专门用于博客列表的卡片样式 */
        .stack-app .post-card { display: flex; flex-direction: column; justify-content: space-between; }
        .stack-app .post-date { font-size: 1.36rem; color: inherit; margin-bottom: 10px; }