/* Mobile-friendly 功能网格 */
.modules-grid {
    display: grid;
    gap: 1rem;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
}

/* 卡片统一样式（兼容已有 .featured-card） */
.modules-grid a,
.featured-card {
    background: #fff;
    border-radius: .75rem;
    box-shadow: 0 2px 6px rgba(0,0,0,.08);
    padding: 1rem;
    text-align: center;
    text-decoration: none;
    color: inherit;
    transition: transform .15s ease, box-shadow .15s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
}
.modules-grid a:hover,
.featured-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,.12);
}
.modules-grid a .featured-card__icon,
.featured-card .featured-card__icon {
    font-size: 2rem;
    margin-bottom: .4rem;
    display: block;
}
.modules-grid a .featured-card__title,
.featured-card .featured-card__title {
    font-size: .9rem;
    font-weight: 500;
    margin: .4rem 0;
}
.modules-grid a .featured-card__desc,
.featured-card .featured-card__desc {
    font-size: .8rem;
    color: #666;
    line-height: 1.4;
}

@media (max-width: 480px) {
    .modules-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 481px) and (max-width: 767px) {
    .modules-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (min-width: 768px) {
    .modules-grid { grid-template-columns: repeat(4, 1fr); }
}