.subpage-detail {
    padding: 56px 0 72px;
    background: var(--white);
}

.subpage-card {
    background: var(--bg-light);
    border-radius: 12px;
    padding: clamp(22px, 4vw, 42px);
    box-shadow: 0 10px 32px rgba(0,0,0,0.05);
}

.subpage-label {
    display: inline-block;
    color: var(--accent-color);
    font-size: 14px;
    font-weight: 800;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    margin-bottom: 10px;
}

.subpage-card h2 {
    color: var(--primary-color);
    font-size: clamp(24px, 4vw, 40px);
    line-height: 1.18;
    margin-bottom: 10px;
}

.subpage-title-en {
    color: var(--text-muted);
    font-size: clamp(18px, 2.6vw, 26px);
    line-height: 1.25;
    font-weight: 700;
    margin-bottom: 16px;
}

.subpage-meta {
    color: var(--text-muted);
    font-size: 16px;
    margin-bottom: 12px;
}

.subpage-action-note {
    color: var(--text-muted);
    font-size: 14px;
    margin-bottom: 18px;
}

.subpage-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 28px;
}

.subpage-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 11px 18px;
    border-radius: 7px;
    font-weight: 800;
    text-decoration: none;
    transition: 0.25s ease;
}

.subpage-btn-primary {
    background: var(--primary-color);
    color: var(--white);
    border: 2px solid var(--primary-color);
}

.subpage-btn-primary:hover {
    background: transparent;
    color: var(--primary-color);
}

.subpage-btn-home {
    background: #28a745;
    color: var(--white);
    border: 2px solid #28a745;
}

.subpage-btn-home:hover {
    background: #218838;
    border-color: #218838;
}

.subpage-image-frame {
    width: 100%;
    aspect-ratio: 16 / 8;
    margin: 0;
    padding: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--white);
    border: 1px solid rgba(4, 2, 116, 0.1);
    border-radius: 10px;
}

.subpage-image {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: contain;
    border-radius: 8px;
}

@media (max-width: 640px) {
    .subpage-detail {
        padding: 24px 0 36px;
    }

    .subpage-actions {
        flex-direction: column;
    }

    .subpage-btn {
        width: 100%;
    }

    .subpage-image-frame {
        aspect-ratio: 4 / 3;
        padding: 6px;
    }
}