.lesson-document{font-family:system-ui,-apple-system,'Microsoft YaHei',sans-serif;font-size:15px;line-height:1.8;max-width:720px;width:100%;color:inherit;container-type:inline-size}
.lesson-document-paragraph{margin:0 0 10px;white-space:pre-wrap;overflow-wrap:anywhere}
.lesson-document-cell{display:inline-block;vertical-align:top;max-width:100%;min-width:0}
.lesson-document img{display:inline-block;vertical-align:middle;width:auto;max-width:100%;height:auto;max-height:320px;object-fit:contain;background:#fff;cursor:zoom-in}
.lesson-document td img{display:block;margin:4px auto;max-height:220px}
.lesson-document table{border-collapse:collapse;white-space:normal;max-width:100%;width:100%;table-layout:fixed}
.lesson-document td{border:1px solid #cbd5e1;padding:6px;overflow-wrap:anywhere;vertical-align:top}
.lesson-document img.lesson-formula-image{display:inline-block;vertical-align:middle;object-fit:contain;border-radius:2px;margin:0 2px;max-width:100%}