.cluster-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
}

.cluster-card {
    display: block;
    padding: 1.2rem;
    background: #fff;
    border: 1px solid #e8eaf0;
    border-radius: 12px;
    color: inherit;
    text-decoration: none;
    transition: border-color 0.2s, box-shadow 0.2s, transform 0.2s;
}

.cluster-card:hover {
    border-color: #2563eb;
    box-shadow: 0 10px 24px rgba(37, 99, 235, 0.12);
    transform: translateY(-2px);
    text-decoration: none;
}

.cluster-card-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.8rem;
    margin-bottom: 0.5rem;
}

.cluster-card-icon {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 999px;
    background: #eff6ff;
    color: #2563eb;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    font-weight: 700;
}

.cluster-card-name {
    font-size: 1rem;
    font-weight: 700;
    color: #1f2937;
}

.cluster-card-tag {
    padding: 0.2rem 0.55rem;
    border-radius: 999px;
    background: #f3f4f6;
    color: #6b7280;
    font-size: 0.75rem;
}

.cluster-card-desc {
    color: #4b5563;
    font-size: 0.92rem;
    line-height: 1.7;
}

.cluster-tips {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1rem;
}

.cluster-tip {
    background: #fff;
    border: 1px solid #e8eaf0;
    border-radius: 12px;
    padding: 1rem 1.1rem;
}

.cluster-tip-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: #1f2937;
    margin-bottom: 0.4rem;
}

.cluster-tip-desc {
    color: #4b5563;
    font-size: 0.88rem;
    line-height: 1.7;
}

@media (max-width: 900px) {
    .cluster-tips {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    .cluster-grid {
        grid-template-columns: 1fr;
    }
}