.group {
    max-width: 1200px;
    margin: 60px auto;
    padding: 0 20px;
}

.group-title {
    text-align: center;
    font-size: 2.4rem;
    margin: 50px 0 30px;
}

/* 科（中央） */
.family-title {
    text-align: center;
    font-size: 2.8rem;
    margin: 80px 0 40px;
    letter-spacing: 0.08em;
}

/* 属（左） */
.sub-title {
    text-align: left;
    font-size: 1.2rem;
    margin: 35px 0 15px;
    color: var(--accent);
    border-left: 4px solid var(--accent);
    padding-left: 12px;
}

/* 3列グリッド */
.db-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

/* カード */
.db-card {
    display: block;
    text-decoration: none;
    color: inherit;
    background: white;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 8px 24px rgba(0,0,0,0.08);
}

.db-card {
    transition:
        transform 0.35s cubic-bezier(.22,1,.36,1),
        box-shadow 0.35s cubic-bezier(.22,1,.36,1);
}

.db-card:hover {
    transform: translateY(-2px);

    box-shadow:
        0 20px 50px rgba(0,0,0,0.10);
}

.db-card img {
    width: 100%;
    height: 180px;
    object-fit: cover;
}

.db-text {
    padding: 14px;
}

.db-text h2 {
    font-size: 1rem;
}

.db-text p {
    font-size: 0.85rem;
    color: #6b7a75;
}

/* responsive */
@media (max-width: 900px) {
    .db-grid {
        grid-template-columns: 1fr;
    }
}

.article-block img.vertical{
    width:auto;
    height:auto;
    max-width:100%;
    max-height:none;
    object-fit:unset;
    display:block;
    margin:0 auto;
}

.db-card img.vertical{
    object-fit:contain;
    background:white;
    padding:8px;
}

.collection-photo{
    margin:35px 0 50px;
}

.collection-photo img{
    width:100%;
    display:block;
    border-radius:10px;
    box-shadow:0 10px 30px rgba(0,0,0,.10);
}