依赖主要代码

<depends>

      <field id="section_id/group_id/field_id">1</field>

</depends>

依赖示例：依赖web/type的值

                ...
                <field id="type" translate="label" type="select" sortOrder="1" showInDefault="1" showInWebsite="1"
                       showInStore="1">
                    <label>是否A类型网站</label>
                    <source_model>Magento\Config\Model\Config\Source\Yesno</source_model>
                    <comment>网站A/B类型,Yes(A),No(B).</comment>
                </field>
                <field id="pay_sku" translate="label" type="text" sortOrder="1" showInDefault="1" showInWebsite="1"
                       showInStore="1">
                    <label>跳转后支付产品的sku（这个产品不会在B站前台可见）</label>
                    <comment>跳转到B站后会检测这个产品存不存在，不存在会新建这个sku的产品，用于支付时静默状态新建订单是价格的承载商品，可用于识别特定A站的支付订单.</comment>
                    <validate>required-entry</validate>
                    <depends>
                        <field id="Aiweline_PaymentGateway_admin/web/type">1</field>
                    </depends>
                </field>
                <field id="pay_sku_title" translate="label" type="text" sortOrder="1" showInDefault="1" showInWebsite="1"
                       showInStore="1">
                    <label>跳转后支付产品的标题（这个产品不会在B站前台可见）</label>
                    <comment>来自A站的承载商品标题，可用于识别特定A站的支付订单.</comment>
                    <validate>required-entry</validate>
                    <depends>
                        <field id="Aiweline_PaymentGateway_admin/web/type">1</field>
                    </depends>
                </field>
                <field id="pay_sku_stock" translate="label" type="text" sortOrder="1" showInDefault="1" showInWebsite="1"
                       showInStore="1">
                    <label>跳转后支付产品的默认库存</label>
                    <comment>来自A站的承载商品库存，库存不足时会翻倍设置库存.</comment>
                    <validate>required-entry</validate>
                    <depends>
                        <field id="Aiweline_PaymentGateway_admin/web/type">1</field>
                    </depends>
                </field>
                ...