/* 业务子分类导航 */
.business-categories {
    max-width: 1690px;
    margin: 30px auto 0 auto;
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
    justify-content: center;
}

.business-categories a {
    display: inline-block;
    padding: 6px 14px; /* 略微减小 */
    font-size: clamp(12px, 1vw, 16px); /* 略小 */
    border-radius: 4px;
    background-color: #333;
    color: #fff;
    text-decoration: none;
    transition: background 0.3s;
}

.business-categories a.active,
.business-categories a:hover {
    background-color: #ff0000;
}

/* 业务列表 */
.business-list {
    max-width: 1690px;
    margin: 30px auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(360px, 1fr)); /* 略微缩小列宽 */
    gap: 25px; /* 缩小间距 */
}

.business-item {
    background-color: #1a1a1a;
    border-radius: 8px;
    overflow: hidden;
    transition: transform 0.3s;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    height: 400px; /* 略微减高 */
}

.business-item:hover {
    transform: translateY(-4px);
}

.business-image {
    flex: 1;
    overflow: hidden;
}

.business-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.3s;
}

.business-item:hover .business-image img {
    transform: scale(1.05);
}

.business-info {
    padding: 12px 16px; /* 略微减小 padding */
    background-color: rgba(255,255,255,0.95);
    color: #000;
    text-align: left;
}

.business-title {
    font-size: clamp(16px, 1.5vw, 20px); /* 略微缩小标题 */
    font-weight: bold;
    margin-bottom: 8px;
}

.business-desc {
    font-size: clamp(13px, 1.2vw, 15px); /* 略微缩小描述 */
    line-height: 1.5em;
}

/* 响应式 */
@media screen and (max-width: 1200px) {
    .business-list {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    }
}

@media screen and (max-width: 768px) {
    .business-item {
        height: auto;
    }
    .business-info {
        padding: 8px 12px;
    }
    .business-title {
        font-size: clamp(14px, 4vw, 18px);
    }
    .business-desc {
        font-size: clamp(12px, 3vw, 14px);
        line-height: 1.4em;
    }
    .business-categories a {
        font-size: clamp(11px, 3vw, 14px);
        padding: 5px 10px;
    }
}