<svg xmlns="http://www.w3.org/2000/svg" width="1200" height="675" viewBox="0 0 1200 675"><rect width="1200" height="675" fill="#f8fafc"/><text x="72" y="92" font-size="36" font-family="Arial,'Microsoft YaHei',sans-serif" font-weight="700" fill="#334155">灰度发布与金丝雀发布：Istio流量切分实践</text><g transform="translate(120,190)"><rect x="0" y="0" width="250" height="100" rx="22" fill="#64748b"/><text x="125" y="60" text-anchor="middle" font-size="22" font-family="Arial,'Microsoft YaHei',sans-serif" font-weight="700" fill="white">接入入口</text><rect x="310" y="0" width="250" height="100" rx="22" fill="#cbd5e1"/><text x="435" y="60" text-anchor="middle" font-size="22" font-family="Arial,'Microsoft YaHei',sans-serif" font-weight="700" fill="#334155">服务通信</text><rect x="620" y="0" width="250" height="100" rx="22" fill="#64748b"/><text x="745" y="60" text-anchor="middle" font-size="22" font-family="Arial,'Microsoft YaHei',sans-serif" font-weight="700" fill="white">策略隔离</text><rect x="0" y="150" width="250" height="100" rx="22" fill="#cbd5e1"/><text x="125" y="210" text-anchor="middle" font-size="22" font-family="Arial,'Microsoft YaHei',sans-serif" font-weight="700" fill="#334155">指标采集</text><rect x="310" y="150" width="250" height="100" rx="22" fill="#64748b"/><text x="435" y="210" text-anchor="middle" font-size="22" font-family="Arial,'Microsoft YaHei',sans-serif" font-weight="700" fill="white">问题定位</text></g><text x="72" y="600" font-size="24" font-family="Arial,'Microsoft YaHei',sans-serif" fill="#334155">把能力、风险和流程放在同一张图里评估</text></svg>