.about-hero {
    background: var(--white);
    color: var(--black);
    text-align: center;
    padding: 3rem 2rem;
    min-height: calc(100vh - 64px);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1.75rem;
    position: relative;
}

.about-hero .headline {
    font-size: clamp(3.25rem, 9vw, 7rem);
    font-weight: 900;
    line-height: 1.02;
    letter-spacing: -0.03em;
}

.about-intro {
    max-width: 860px;
    font-size: 1.1rem;
    line-height: 1.9;
    color: #444;
}

.about-intro a {
    color: var(--black);
    font-weight: 700;
    text-decoration: underline;
    text-underline-offset: 3px;
}

/* ---------- Q&A ---------- */
.qa {
    background: var(--black);
    color: var(--white);
    padding: 9rem 2.5rem;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.qa-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 3rem;
    text-align: center;
}

.qa-list {
    width: 100%;
    max-width: 760px;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.qa-item {
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: 8px;
    padding: 0 1.5rem;
    transition: border-color 0.2s ease, background 0.2s ease;
}

.qa-item[open] {
    background: rgba(255, 255, 255, 0.04);
    border-color: rgba(255, 255, 255, 0.35);
}

.qa-item summary {
    list-style: none;
    cursor: pointer;
    font-size: 1.1rem;
    font-weight: 700;
    padding: 1.4rem 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.qa-item summary::-webkit-details-marker {
    display: none;
}

.qa-item summary::after {
    content: "+";
    font-size: 1.6rem;
    font-weight: 400;
    line-height: 1;
    color: #9a9a9a;
    transition: transform 0.2s ease, color 0.2s ease;
    flex-shrink: 0;
}

.qa-item[open] summary::after {
    transform: rotate(45deg);
    color: var(--white);
}

.qa-item p {
    padding: 0 0 1.5rem;
    font-size: 1rem;
    line-height: 1.8;
    color: #d6d6d6;
    max-width: 640px;
}

.qa-item p a {
    color: var(--white);
    font-weight: 700;
    text-decoration: underline;
    text-underline-offset: 3px;
}

@media (max-width: 820px) {
    .qa {
        padding: 5rem 1.5rem;
    }

    .qa-item summary {
        font-size: 1rem;
    }
}