若依页面前端相关问题

问题遇到的现象和发生背景

如图所示新增页面真的太丑的，长的长短的短，请问问大家这个怎么调整呢

问题相关代码，请勿粘贴截图

<el-dialog :title="title" :visible.sync="open" width="600px" append-to-body>
      <el-form ref="form" :model="form" :rules="rules" label-width="80px">
        <el-row>
          <el-col :span="12">
            <el-form-item label="用户昵称" prop="nickName">
              <el-input v-model="form.nickName" placeholder="请输入用户昵称" maxlength="30" />
            </el-form-item>
          </el-col>
          <el-col :span="12">
            <el-form-item label="归属部门" prop="deptId">
              <treeselect v-model="form.deptId" :options="deptOptions" :show-count="true" placeholder="请选择归属部门" />
            </el-form-item>
          </el-col>
        </el-row>
        <el-row>
          <el-col :span="12">
            <el-form-item label="手机号码" prop="phonenumber">
              <el-input v-model="form.phonenumber" placeholder="请输入手机号码" maxlength="11" />
            </el-form-item>
          </el-col>
          <el-col :span="12">
            <el-form-item label="邮箱" prop="email">
              <el-input v-model="form.email" placeholder="请输入邮箱" maxlength="50" />
            </el-form-item>
          </el-col>
        </el-row>
        <el-row>
          <el-col :span="12">
            <el-form-item v-if="form.userId == undefined" label="用户名称" prop="userName">
              <el-input v-model="form.userName" placeholder="请输入用户名称" maxlength="30" />
            </el-form-item>
          </el-col>
          <el-col :span="12">
            <el-form-item v-if="form.userId == undefined" label="用户密码" prop="password">
              <el-input v-model="form.password" placeholder="请输入用户密码" type="password" maxlength="20" show-password/>
            </el-form-item>
          </el-col>
        </el-row>
        <el-row>
          <el-col :span="12">
            <el-form-item label="用户性别">
              <el-select v-model="form.sex" placeholder="请选择性别">
                <el-option
                  v-for="dict in dict.type.sys_user_sex"
                  :key="dict.value"
                  :label="dict.label"
                  :value="dict.value"
                ></el-option>
              </el-select>
            </el-form-item>
          </el-col>
          <el-col :span="12">
            <el-form-item label="状态">
              <el-radio-group v-model="form.status">
                <el-radio
                  v-for="dict in dict.type.sys_normal_disable"
                  :key="dict.value"
                  :label="dict.value"
                >{{dict.label}}</el-radio>
              </el-radio-group>
            </el-form-item>
          </el-col>
        </el-row>
        <el-row>
          <el-col :span="12">
            <el-form-item label="岗位">
              <el-select v-model="form.postIds" multiple placeholder="请选择岗位">
                <el-option
                  v-for="item in postOptions"
                  :key="item.postId"
                  :label="item.postName"
                  :value="item.postId"
                  :disabled="item.status == 1"
                ></el-option>
              </el-select>
            </el-form-item>
          </el-col>
          <el-col :span="12">
            <el-form-item label="角色">
              <el-select v-model="form.roleIds" multiple placeholder="请选择角色">
                <el-option
                  v-for="item in roleOptions"
                  :key="item.roleId"
                  :label="item.roleName"
                  :value="item.roleId"
                  :disabled="item.status == 1"
                ></el-option>
              </el-select>
            </el-form-item>
          </el-col>
        </el-row>
        <el-row>
          <el-col :span="24">
            <el-form-item label="备注">
              <el-input v-model="form.remark" type="textarea" placeholder="请输入内容"></el-input>
            </el-form-item>
          </el-col>
        </el-row>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button type="primary" @click="submitForm">确 定</el-button>
        <el-button @click="cancel">取 消</el-button>
      </div>
    </el-dialog>

运行结果及报错内容

还有一个问题：客户这边有一个合同管理的需求，然后里面要求实现客户可以上传PDF格式的合同，包括在线预览啥的，但是不知道怎么设计好一点

简单的来说就是站在客户的角度来看，怎么设计更合理点，最好还可以提供一下demo，小生在此谢谢了

我的解答思路和尝试过的方法

我想要达到的结果

el-form ref="form" :model="form" :rules="rules" label-width="80px"
label-width="auto"(自适应)或者 label-width="160px"（对齐写最大宽度）