.wcisc-split-images {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 12px;
    margin-bottom: 12px;
}

.wcisc-split-item {
    position: relative;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    padding: 6px;
    cursor: pointer;
    text-align: center;
    transition: all 0.2s ease-in-out;
    background-color: #fff;
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}

.wcisc-split-item:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
    border-color: #0073aa;
}

.wcisc-split-item img {
    max-width: 100%;
    height: auto;
    border-radius: 6px;
    display: block;
    margin: 0 auto;
}

.wcisc-split-item input.wcisc-split-checkbox {
    display: none;
}

.wcisc-split-item::after {
    content: "✓";
    position: absolute;
    top: 6px;
    right: 6px;
    background-color: #0073aa;
    color: #fff;
    font-size: 14px;
    width: 22px;
    height: 22px;
    text-align: center;
    line-height: 22px;
    border-radius: 50%;
    opacity: 0;
    transition: opacity 0.2s ease-in-out;
}

.wcisc-split-item.selected {
    border-color: #0073aa;
    box-shadow: 0 0 10px rgba(0, 115, 170, 0.4);
}

.wcisc-split-item.selected::after {
    opacity: 1;
}

#wcisc-split-preview {
    font-weight: bold;
    margin-top: 8px;
    color: #0073aa;
    font-size: 14px;
}

/* 响应式布局 */
@media (max-width: 1200px) {
    .wcisc-split-images {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (max-width: 992px) {
    .wcisc-split-images {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .wcisc-split-images {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .wcisc-split-images {
        grid-template-columns: 1fr;
    }
}