/* =====================================================
   คำถาม — เปิดแล้วคำตอบชิดขึ้น + ลูกศรหมุน
===================================================== */
.head-f9q2k4 {
    transition: padding-bottom 0.3s ease;
}
.item-f9q2k4.is-open .head-f9q2k4 {
    padding-bottom: 16px;
}
.chev-f9q2k4 {
    transition: transform 0.3s ease;
}
.item-f9q2k4.is-open .chev-f9q2k4 {
    transform: rotate(180deg);
}

/* คำตอบ — ยืด/หดด้วย grid-template-rows (0fr <-> 1fr) */
.panel-f9q2k4 {
    display: grid;
    grid-template-rows: 0fr;
    transition: grid-template-rows 0.3s ease;
}
.item-f9q2k4.is-open .panel-f9q2k4 {
    grid-template-rows: 1fr;
}
.panel-f9q2k4 > div {
    min-height: 0;
    overflow: hidden;
}