.stack-app .category-section { background: var(--card-background); border-radius: var(--card-border-radius); padding: 1.92rem; margin-bottom: 2.4rem; box-shadow: var(--shadow-l1); border-top: 1px solid var(--card-separator-color); }
        .stack-app .category-title { color: inherit; margin-top: 0; border-bottom: 1px solid var(--card-separator-color); padding-bottom: 8px; font-size: 1.92rem; display: flex; align-items: center; justify-content: space-between; list-style: none; user-select: none;}
        .stack-app .category-title::-webkit-details-marker { display: none; }
        .stack-app .category-title:focus-visible { outline: 3px solid var(--highlight); outline-offset: 3px; }
        
        /* 为了紧凑显示 */
        .stack-app .chapter-container {
            max-height: 350px;
            overflow-y: auto;
            margin-top: 10px;
            border: 1px solid var(--card-separator-color);
            border-radius: var(--card-border-radius);
        }
        
        .stack-app .chapter-table { width: 100%; border-collapse: collapse; margin-top: 0; font-size: 1.52rem; }
        .stack-app .chapter-table thead { position: sticky; top: 0; background: var(--card-background); z-index: 1; box-shadow: var(--shadow-l1); }
        .stack-app .chapter-table th,
.stack-app .chapter-table td { padding: 6px 8px; text-align: left; border-bottom: 1px solid var(--card-separator-color); }
        .stack-app .chapter-table tr:hover { background-color: var(--card-background); }
        .stack-app .chapter-table th { color: inherit; font-size: 1.36rem; padding: 6px 8px; font-weight: 500;}
        .stack-app .chapter-table a { text-decoration: none; color: inherit; font-weight: 500; display: block; transition: all 0.2s;}
        .stack-app .chapter-table a:hover { color: inherit; transform: translateX(3px); }
        
        /* 滚动条美化 */
        .stack-app .chapter-container::-webkit-scrollbar { width: 6px; }
        .stack-app .chapter-container::-webkit-scrollbar-track { background: transparent; }
        .stack-app .chapter-container::-webkit-scrollbar-thumb { background: var(--card-background); border-radius: var(--card-border-radius); }
        .stack-app .chapter-container::-webkit-scrollbar-thumb:hover { background: var(--card-background); }