/* ── 上传区域 ── */
.upload-zone {
    border: 2px dashed #d0d5dd;
    border-radius: 12px;
    padding: 3rem 2rem;
    text-align: center;
    cursor: pointer;
    transition: border-color 0.2s, background 0.2s;
    background: #fafbfc;
}

.upload-zone:hover,
.upload-zone.drag-over {
    border-color: #2563eb;
    background: #f0f4ff;
}

.upload-icon {
    font-size: 2.5rem;
    color: #b0b8c4;
    margin-bottom: 0.8rem;
    line-height: 1;
}

.upload-zone:hover .upload-icon,
.upload-zone.drag-over .upload-icon {
    color: #2563eb;
}

.upload-text {
    font-size: 1rem;
    color: #555;
    margin-bottom: 0.4rem;
    font-weight: 500;
}

.upload-hint {
    font-size: 0.82rem;
    color: #999;
}

/* ── 预览区域 ── */
.preview-area {
    margin-top: 1.5rem;
}

.preview-info {
    display: flex;
    gap: 1rem;
    align-items: center;
    margin-bottom: 1rem;
    font-size: 0.88rem;
    color: #666;
    flex-wrap: wrap;
}

.preview-name {
    font-weight: 600;
    color: #333;
}

.preview-size,
.preview-dim {
    background: #f0f0f0;
    padding: 0.15rem 0.5rem;
    border-radius: 4px;
    font-size: 0.82rem;
}

.preview-img-wrap {
    background: #f8f9fb;
    border: 1px solid #e8eaf0;
    border-radius: 8px;
    padding: 1rem;
    text-align: center;
    margin-bottom: 1rem;
}

.preview-img-wrap img {
    max-width: 100%;
    max-height: 400px;
    border-radius: 4px;
}

/* ── Mobile ── */
@media (max-width: 640px) {
    .upload-zone {
        padding: 2rem 1rem;
    }

    .preview-img-wrap img {
        max-height: 280px;
    }
}