diff --git a/notes/pics/feign-chain.png b/notes/pics/feign-chain.png
index 23969450..a15094d9 100644
Binary files a/notes/pics/feign-chain.png and b/notes/pics/feign-chain.png differ
diff --git a/notes/pics/instance-down.png b/notes/pics/instance-down.png
index c4c75f0e..7a7567f9 100644
Binary files a/notes/pics/instance-down.png and b/notes/pics/instance-down.png differ
diff --git a/notes/pics/microservice-overview.png b/notes/pics/microservice-overview.png
index 3dedb721..25c525d4 100644
Binary files a/notes/pics/microservice-overview.png and b/notes/pics/microservice-overview.png differ
diff --git a/tools/diagram/src/feign-chain.svg b/tools/diagram/src/feign-chain.svg
index 04c2bfb5..b5fe86dc 100644
--- a/tools/diagram/src/feign-chain.svg
+++ b/tools/diagram/src/feign-chain.svg
@@ -1,31 +1,31 @@
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-    text { font-family: "PingFang SC", "Microsoft YaHei", Helvetica, Arial, sans-serif; fill: #666; font-size: 12px; }
-    .title { font-weight: bold; font-size: 15px; fill: #777; text-anchor: middle; }
+    text { font-family: "PingFang SC", "Microsoft YaHei", Helvetica, Arial, sans-serif; fill: #3F3F3F; font-size: 12px; }
+    .title { font-weight: bold; font-size: 15px; fill: #333; text-anchor: middle; }
     .b { font-weight: bold; }
     .c { text-anchor: middle; }
     .e { text-anchor: end; }
     .note { fill: #C0605A; }
     .ok { fill: #6A9F68; }
-    .sub { font-size: 11px; fill: #888; }
+    .sub { font-size: 11px; fill: #6E6E6E; }
     .mono { font-family: Menlo, Consolas, monospace; }
-    .arrow { stroke: #666; stroke-width: 1.3; fill: none; marker-end: url(#a); }
+    .arrow { stroke: #555; stroke-width: 1.1; fill: none; marker-end: url(#a); }
     .red { stroke: #C0605A; marker-end: url(#r); }
     .green { stroke: #6A9F68; marker-end: url(#g); }
     .dash { stroke-dasharray: 5 4; }
-    .line { stroke: #666; stroke-width: 1.3; fill: none; }
+    .line { stroke: #555; stroke-width: 1.1; fill: none; }
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-      <path d="M1,1 L9,5 L1,9" fill="none" stroke="#666" stroke-width="1.6"/>
+      <path d="M1,1.5 L9.5,5 L1,8.5 z" fill="#555"/>
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     <marker id="r" viewBox="0 0 10 10" refX="9" refY="5" markerWidth="7" markerHeight="7" orient="auto-start-reverse">
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+      <path d="M1,1.5 L9.5,5 L1,8.5 z" fill="#C0605A"/>
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@@ -47,52 +47,52 @@
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+  <rect x="40" y="240" width="260" height="92" rx="6" fill="#C6ECE9" stroke="#7DBCB7" stroke-width="1.2"/>
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+  <circle cx="202" cy="290.5" r="2" fill="#7FB2D6"/>
+  <line x1="209" y1="290.5" x2="228" y2="290.5" stroke="#7FB2D6" stroke-width="1"/>
   <text x="125" y="316" class="c b">8081 ✓</text>
   <text x="215" y="316" class="c sub">8082</text>
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   <text x="180" y="352" class="sub">reconstructURI：把服务名换成实例地址</text>
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-  <path d="M40,367 L54,377 L68,367" fill="none" stroke="#A99FD8" stroke-width="1"/>
+  <rect x="40" y="366" width="260" height="32" rx="3" fill="#E6E3FA" stroke="#B8B0DE" stroke-width="1.2"/>
+  <path d="M40,367 L54,377 L68,367" fill="none" stroke="#B8B0DE" stroke-width="1"/>
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+  <line x1="421" y1="382.5" x2="446" y2="382.5" stroke="#B8B0DE" stroke-width="1"/>
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+  <line x1="421" y1="398.5" x2="446" y2="398.5" stroke="#B8B0DE" stroke-width="1"/>
   <text x="430" y="422" class="c b">库存服务 8081</text>
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-  <rect x="465" y="52" width="170" height="22" rx="5" fill="#B5B5B5" opacity="0.35"/>
+  <rect x="465" y="52" width="170" height="70" rx="5" fill="#EAE9E7" stroke="#BFBEBA" stroke-width="1.2"/>
+  <rect x="465" y="52" width="170" height="22" rx="5" fill="#BFBEBA" opacity="0.35"/>
   <text x="550" y="67" class="c b">Nacos 注册中心</text>
-  <rect x="471" y="80" width="158" height="16" rx="3" fill="#FFFFFF" stroke="#B5B5B5" stroke-width="0.6"/>
+  <rect x="471" y="80" width="158" height="16" rx="3" fill="#FFFFFF" stroke="#BFBEBA" stroke-width="0.6"/>
   <text x="477" y="92" class="sub mono">127.0.0.1:8081</text>
-  <rect x="471" y="100" width="158" height="16" rx="3" fill="#FFFFFF" stroke="#B5B5B5" stroke-width="0.6"/>
+  <rect x="471" y="100" width="158" height="16" rx="3" fill="#FFFFFF" stroke="#BFBEBA" stroke-width="0.6"/>
   <text x="477" y="112" class="sub mono">127.0.0.1:8082</text>
   <text x="550" y="140" class="c sub mono">NacosDiscoveryClient</text>
   <line x1="550" y1="146" x2="550" y2="172" class="arrow "/>
-  <rect x="465" y="174" width="170" height="34" rx="6" fill="#DDD7F6" stroke="#A99FD8" stroke-width="1.2"/>
+  <rect x="465" y="174" width="170" height="34" rx="6" fill="#E6E3FA" stroke="#B8B0DE" stroke-width="1.2"/>
   <text x="550" y="196" class="c b">DiscoveryClient 接口</text>
   <text x="550" y="222" class="c sub mono">CompositeDiscoveryClient</text>
   <line x1="550" y1="228" x2="550" y2="254" class="arrow "/>
-  <rect x="465" y="256" width="170" height="40" rx="6" fill="#FFFFFF" stroke="#78BFC4" stroke-width="1.2"/>
+  <rect x="465" y="256" width="170" height="40" rx="6" fill="#FFFFFF" stroke="#7DBCB7" stroke-width="1.2"/>
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   <path d="M490,270 V276 L494.5,279" fill="none" stroke="#888" stroke-width="1.4" stroke-linecap="round"/>
   <text x="510" y="281" class="b">缓存实例列表 35 秒</text>
diff --git a/tools/diagram/src/instance-down.svg b/tools/diagram/src/instance-down.svg
index dbb813ed..4fda0909 100644
--- a/tools/diagram/src/instance-down.svg
+++ b/tools/diagram/src/instance-down.svg
@@ -1,31 +1,31 @@
 <svg xmlns="http://www.w3.org/2000/svg" width="740" height="336" viewBox="0 0 740 336">
   <style>
-    text { font-family: "PingFang SC", "Microsoft YaHei", Helvetica, Arial, sans-serif; fill: #666; font-size: 12px; }
-    .title { font-weight: bold; font-size: 15px; fill: #777; text-anchor: middle; }
+    text { font-family: "PingFang SC", "Microsoft YaHei", Helvetica, Arial, sans-serif; fill: #3F3F3F; font-size: 12px; }
+    .title { font-weight: bold; font-size: 15px; fill: #333; text-anchor: middle; }
     .b { font-weight: bold; }
     .c { text-anchor: middle; }
     .e { text-anchor: end; }
     .note { fill: #C0605A; }
     .ok { fill: #6A9F68; }
-    .sub { font-size: 11px; fill: #888; }
+    .sub { font-size: 11px; fill: #6E6E6E; }
     .mono { font-family: Menlo, Consolas, monospace; }
-    .arrow { stroke: #666; stroke-width: 1.3; fill: none; marker-end: url(#a); }
+    .arrow { stroke: #555; stroke-width: 1.1; fill: none; marker-end: url(#a); }
     .red { stroke: #C0605A; marker-end: url(#r); }
     .green { stroke: #6A9F68; marker-end: url(#g); }
     .dash { stroke-dasharray: 5 4; }
-    .line { stroke: #666; stroke-width: 1.3; fill: none; }
+    .line { stroke: #555; stroke-width: 1.1; fill: none; }
     .frame { fill: none; stroke: #999; stroke-width: 1; stroke-dasharray: 4 3; }
     .shadow { fill: #DADADA; }
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   <defs>
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-      <path d="M1,1 L9,5 L1,9" fill="none" stroke="#666" stroke-width="1.6"/>
+      <path d="M1,1.5 L9.5,5 L1,8.5 z" fill="#555"/>
     </marker>
     <marker id="r" viewBox="0 0 10 10" refX="9" refY="5" markerWidth="7" markerHeight="7" orient="auto-start-reverse">
-      <path d="M1,1 L9,5 L1,9" fill="none" stroke="#C0605A" stroke-width="1.6"/>
+      <path d="M1,1.5 L9.5,5 L1,8.5 z" fill="#C0605A"/>
     </marker>
     <marker id="g" viewBox="0 0 10 10" refX="9" refY="5" markerWidth="7" markerHeight="7" orient="auto-start-reverse">
-      <path d="M1,1 L9,5 L1,9" fill="none" stroke="#6A9F68" stroke-width="1.6"/>
+      <path d="M1,1.5 L9.5,5 L1,8.5 z" fill="#6A9F68"/>
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-  <text x="261.05" y="50" class="sub" fill="#7A70C8">Nacos 删除实例 0.6 s</text>
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-  <text x="524.25" y="50" class="sub" fill="#7A70C8">进程卡住时 Nacos 23 s 后才删除</text>
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-  <text x="657.25" y="304" class="sub e" fill="#7A70C8">负载均衡缓存 35 s 过期</text>
+  <line x1="257.1" y1="58" x2="257.1" y2="270" stroke="#9F94D5" stroke-width="1.5" stroke-dasharray="4 3"/>
+  <text x="261.05" y="50" class="sub" fill="#766AA8">Nacos 删除实例 0.6 s</text>
+  <line x1="520.2" y1="58" x2="520.2" y2="270" stroke="#9F94D5" stroke-width="1.5" stroke-dasharray="4 3"/>
+  <text x="524.25" y="50" class="sub" fill="#766AA8">进程卡住时 Nacos 23 s 后才删除</text>
+  <line x1="661.2" y1="58" x2="661.2" y2="270" stroke="#9F94D5" stroke-width="1.5" stroke-dasharray="4 3"/>
+  <text x="657.25" y="304" class="sub e" fill="#766AA8">负载均衡缓存 35 s 过期</text>
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diff --git a/tools/diagram/src/microservice-overview.svg b/tools/diagram/src/microservice-overview.svg
index 524c983c..5066cc18 100644
--- a/tools/diagram/src/microservice-overview.svg
+++ b/tools/diagram/src/microservice-overview.svg
@@ -1,84 +1,84 @@
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-    .title { font-weight: bold; font-size: 15px; fill: #777; text-anchor: middle; }
+    text { font-family: "PingFang SC", "Microsoft YaHei", Helvetica, Arial, sans-serif; fill: #3F3F3F; font-size: 12px; }
+    .title { font-weight: bold; font-size: 15px; fill: #333; text-anchor: middle; }
     .b { font-weight: bold; }
     .c { text-anchor: middle; }
     .e { text-anchor: end; }
     .note { fill: #C0605A; }
     .ok { fill: #6A9F68; }
-    .sub { font-size: 11px; fill: #888; }
+    .sub { font-size: 11px; fill: #6E6E6E; }
     .mono { font-family: Menlo, Consolas, monospace; }
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+    .arrow { stroke: #555; stroke-width: 1.1; fill: none; marker-end: url(#a); }
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     .green { stroke: #6A9F68; marker-end: url(#g); }
     .dash { stroke-dasharray: 5 4; }
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+    .line { stroke: #555; stroke-width: 1.1; fill: none; }
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-      <path d="M1,1 L9,5 L1,9" fill="none" stroke="#666" stroke-width="1.6"/>
+      <path d="M1,1.5 L9.5,5 L1,8.5 z" fill="#555"/>
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     <marker id="r" viewBox="0 0 10 10" refX="9" refY="5" markerWidth="7" markerHeight="7" orient="auto-start-reverse">
-      <path d="M1,1 L9,5 L1,9" fill="none" stroke="#C0605A" stroke-width="1.6"/>
+      <path d="M1,1.5 L9.5,5 L1,8.5 z" fill="#C0605A"/>
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     <marker id="g" viewBox="0 0 10 10" refX="9" refY="5" markerWidth="7" markerHeight="7" orient="auto-start-reverse">
-      <path d="M1,1 L9,5 L1,9" fill="none" stroke="#6A9F68" stroke-width="1.6"/>
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-  <rect x="270" y="44" width="250" height="22" rx="5" fill="#B5B5B5" opacity="0.35"/>
+  <rect x="270" y="44" width="250" height="90" rx="5" fill="#EAE9E7" stroke="#BFBEBA" stroke-width="1.2"/>
+  <rect x="270" y="44" width="250" height="22" rx="5" fill="#BFBEBA" opacity="0.35"/>
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-  <rect x="276" y="72" width="238" height="16" rx="3" fill="#FFFFFF" stroke="#B5B5B5" stroke-width="0.6"/>
+  <rect x="276" y="72" width="238" height="16" rx="3" fill="#FFFFFF" stroke="#BFBEBA" stroke-width="0.6"/>
   <text x="282" y="84" class="sub">order-service → :8090</text>
-  <rect x="276" y="92" width="238" height="16" rx="3" fill="#FFFFFF" stroke="#B5B5B5" stroke-width="0.6"/>
+  <rect x="276" y="92" width="238" height="16" rx="3" fill="#FFFFFF" stroke="#BFBEBA" stroke-width="0.6"/>
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+  <rect x="276" y="112" width="238" height="16" rx="3" fill="#FFFFFF" stroke="#BFBEBA" stroke-width="0.6"/>
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   <text x="160" y="338" class="sub">traceId 6ade5947…74b 随请求头 traceparent 传递，各服务的日志中都带上它</text>
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   <text x="20" y="392" class="sub">本机实际运行：Nacos 2.5.4，Spring Boot 3.3，Spring Cloud 2023.0，Spring Cloud Alibaba 2023.0.3.4</text>