/* ========== 表单组件 ========== */
.form-section {
    margin-bottom: 20px;
    padding: 15px;
    background: #f8f9fa;
    border-radius: 8px;
    border-left: 4px solid #3498db;
}

.form-section h3 {
    font-size: 16px;
    color: #2c3e50;
    margin-bottom: 15px;
    font-weight: 600;
}

.form-group {
    margin-bottom: 15px;
}

.form-group:last-child {
    margin-bottom: 0;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-weight: 500;
    color: #34495e;
    font-size: 13px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 14px;
    transition: border-color 0.2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #3498db;
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

.form-group input[type="color"] {
    height: 40px;
    cursor: pointer;
    padding: 2px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

/* 表单输入框 */
.form-input {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 14px;
    transition: border-color 0.3s;
    box-sizing: border-box;
}

.form-input:focus {
    outline: none;
    border-color: #3498db;
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

.form-input::placeholder {
    color: #999;
}

/* 小尺寸输入框 */
.form-input-small {
    width: 100%;
    padding: 6px 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
}

/* 范围滑块 */
.form-range {
    width: 100%;
    margin: 8px 0;
    -webkit-appearance: none;
    appearance: none;
    height: 6px;
    border-radius: 3px;
    background: #e0e0e0;
    outline: none;
}

.form-range::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: #3498db;
    cursor: pointer;
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.form-range::-moz-range-thumb {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: #3498db;
    cursor: pointer;
    border: none;
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.range-value {
    display: inline-block;
    margin-left: 10px;
    font-weight: 600;
    color: #3498db;
    min-width: 40px;
    text-align: center;
}

/* 复选框组 */
.checkbox-group {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 10px;
}

.checkbox-group input[type="checkbox"] {
    width: auto;
    cursor: pointer;
}

.checkbox-group label {
    cursor: pointer;
    user-select: none;
}

.checkbox-input {
    width: 16px;
    height: 16px;
    cursor: pointer;
}

/* 提示文本 */
.hint {
    color: #7f8c8d;
    font-size: 12px;
    margin-top: 5px;
    line-height: 1.5;
}

/* 文件输入 */
.file-input {
    width: 100%;
    padding: 8px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
}

/* 颜色输入 */
.color-input {
    width: 100%;
    height: 36px;
    border: 1px solid #ddd;
    border-radius: 4px;
    cursor: pointer;
}

/* 上传标签 */
.upload-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #666;
}

/* 配置项 */
.config-row {
    display: flex;
    gap: 10px;
    margin-bottom: 12px;
}

.config-item {
    flex: 1;
}

.config-item label {
    display: block;
    margin-bottom: 5px;
    font-size: 13px;
    color: #666;
}

/* 活动批量生成工具表单样式 */
.template-controls .form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.template-controls .form-group label {
    font-weight: 600;
    color: #2c3e50;
    font-size: 14px;
}

.template-controls .form-range {
    flex: 1;
    height: 6px;
    background: #e9ecef;
    border-radius: 3px;
    outline: none;
    -webkit-appearance: none;
}

.template-controls .form-range::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    background: #3498db;
    cursor: pointer;
    border-radius: 50%;
    box-shadow: 0 2px 6px rgba(52, 152, 219, 0.3);
}

.template-controls .form-range::-moz-range-thumb {
    width: 20px;
    height: 20px;
    background: #3498db;
    cursor: pointer;
    border-radius: 50%;
    border: none;
    box-shadow: 0 2px 6px rgba(52, 152, 219, 0.3);
}

.template-controls .form-input {
    width: 80px;
    padding: 8px 12px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 14px;
    text-align: center;
}

.template-controls .form-input:focus {
    outline: none;
    border-color: #3498db;
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

/* 邀请函工具表单样式 */
.invitation-tool .form-section {
    gap: 12px;
    display: flex;
    flex-direction: column;
    background: #f8fbff;
    border-radius: 12px;
    padding: 14px 16px;
    border: 1px solid rgba(15, 95, 215, 0.1);
}

.invitation-tool .form-section.tight h3 {
    margin: 0;
    font-size: 1rem;
}

.invitation-tool .form-section.actions {
    flex-direction: row;
    gap: 12px;
}

.invitation-tool .input-block {
    display: flex;
    flex-direction: column;
    gap: 6px;
    font-size: 0.92rem;
    color: #0b1d33;
}

.invitation-tool .input-block > span {
    font-weight: 600;
}

.invitation-tool .input-block input[type='text'],
.invitation-tool .input-block input[type='number'],
.invitation-tool .input-block input[type='file'] {
    border: 1px solid rgba(16, 37, 66, 0.14);
    border-radius: 8px;
    padding: 8px 10px;
    font-size: 0.95rem;
    background: #ffffff;
}

.invitation-tool .input-block input[type='file'] {
    padding: 6px;
}

.invitation-tool .input-block small {
    font-size: 0.82rem;
    color: #6f7f95;
}

.invitation-tool .input-block code {
    background: rgba(15, 95, 215, 0.1);
    color: #0f3a86;
    padding: 2px 6px;
    border-radius: 6px;
}

.invitation-tool .hint {
    font-size: 0.86rem;
    background: rgba(5, 240, 198, 0.1);
    border-radius: 8px;
    padding: 8px 12px;
    color: #0d2e5c;
}

.invitation-tool .gradient-input .color-pair {
    display: flex;
    gap: 8px;
}

.invitation-tool .color-item {
    display: flex;
    gap: 6px;
    align-items: center;
    flex: 1;
}

.invitation-tool .color-item input[type='color'] {
    width: 40px;
    height: 40px;
    padding: 0;
    border: none;
    background: transparent;
}

.invitation-tool .color-item input[type='text'] {
    flex: 1;
    min-width: 0;
    border: 1px solid rgba(16, 37, 66, 0.14);
    border-radius: 8px;
    padding: 8px 10px;
    font-size: 0.9rem;
}

.invitation-tool .color-item input[type='text']:focus {
    outline: none;
    border-color: #0f5fd7;
    box-shadow: 0 0 0 3px rgba(15, 95, 215, 0.12);
}