/* Only bold the immediate first paragraph, not nested content */
.py.function > dd > p:first-child:not(.field-list *),
.py.method > dd > p:first-child:not(.field-list *),
.py.class > dd > p:first-child:not(.field-list *) {
    font-weight: bold;
}

section[id^="module-"] > p:first-of-type {
    font-weight: bold;
}