.categories {
    background: #fff;
    padding: 60px 0;
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
    margin-top: 40px;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
}

.category-item {
    background: white;
    padding: 25px 30px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    display: flex;
    align-items: center;
    gap: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
    border: 1px solid rgba(0, 0, 0, 0.08);
    position: relative;
}

.category-item i {
    font-size: 26px;
    color: #00a1ff;
    width: 45px;
    height: 45px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f0f7ff;
    border-radius: 10px;
}

.category-item > span {
    flex: 1;
    font-size: 16px;
    color: #2c3e50;
    font-weight: 500;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.category-item > span span {
    font-size: 13px;
    color: #00a1ff;
    font-family: monospace;
    background: rgba(0, 161, 255, 0.08);
    padding: 4px 10px;
    border-radius: 4px;
    display: inline-block;
    font-weight: normal;
    letter-spacing: 0.5px;
    border: 1px solid rgba(0, 161, 255, 0.2);
}

.category-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(0, 0, 0, 0.08);
    border-color: rgba(0, 161, 255, 0.2);
    background: #fafcff;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .category-item {
        padding: 20px;
    }

    .category-item i {
        width: 40px;
        height: 40px;
        font-size: 22px;
    }

    .category-item > span {
        font-size: 15px;
        gap: 4px;
    }

    .category-item > span span {
        font-size: 12px;
        padding: 3px 8px;
    }
}