<svg width="1600" height="900" viewBox="0 0 1600 900" xmlns="http://www.w3.org/2000/svg">
  <rect width="1600" height="900" fill="#fdf2f8" rx="28"/>
  <text x="90" y="110" fill="#831843" font-size="44" font-family="Arial" font-weight="700">审批流分层模型</text>
  <g font-family="Arial">
    <rect x="170" y="210" width="1260" height="120" rx="28" fill="#fce7f3" stroke="#ec4899" stroke-width="3"/>
    <text x="240" y="285" fill="#9d174d" font-size="34" font-weight="700">对象分层：权限申请、环境申请、发布申请分别建模</text>
    <rect x="250" y="390" width="1180" height="120" rx="28" fill="#fbcfe8" stroke="#db2777" stroke-width="3"/>
    <text x="320" y="465" fill="#831843" font-size="34" font-weight="700">环境分层：开发/测试轻审批，预发校验，生产严格控制</text>
    <rect x="330" y="570" width="1100" height="120" rx="28" fill="#f9a8d4" stroke="#be185d" stroke-width="3"/>
    <text x="400" y="645" fill="#500724" font-size="34" font-weight="700">风险分层：低风险自动化，高风险保留人工判断与审计</text>
  </g>
</svg>