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/* v4 corrections: clean one-column layout, fixed dropdown vertical alignment, removed schematic layout spacing */
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/* v5: restored clean voltage divider diagram image */
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.etvdc-diagram-box{display:flex;justify-content:center;align-items:center;background:#fff;border:1px solid #dbe8f8;border-radius:18px;padding:18px;min-height:280px}
.etvdc-diagram-box img{display:block;width:auto;max-width:100%;max-height:430px;height:auto;object-fit:contain}
.etvdc-diagram-note{margin:14px 0 0;padding:14px 16px;border-radius:14px;background:#f1f7ff;border:1px solid #d8e8f8;color:#334761;line-height:1.6}
@media(max-width:560px){.etvdc-diagram-box{padding:12px;min-height:220px}.etvdc-diagram-box img{max-height:340px}}