/* ================================= Mermaid 图表优化 ================================= */
div.mermaid {
    width: 100%;
    display: flex;
    justify-content: center;
    margin: 2rem 0;
    overflow-x: auto;
    align-items: center;
}

/* 使用高优先级选择器替代 !important */
.bd-content div.mermaid svg,
div.mermaid svg {
    width: auto;
    max-width: 100%;
    height: auto;
    max-height: 85vh;
    min-width: auto;
}

/* 移动端适配 */
@media (max-width: 768px) {
    div.mermaid svg {
        max-height: 80vh;
    }
}

/* 横屏适配 */
@media (max-height: 500px) and (orientation: landscape) {
    div.mermaid svg {
        max-height: 60vh;
    }
}

/* 暗色模式 Mermaid 反色 */
@media (prefers-color-scheme: dark) {
    div.mermaid svg {
        filter: invert(93%) hue-rotate(180deg);
    }
}