diff --git a/notes/pics/fencing-token.png b/notes/pics/fencing-token.png
index 0a8b41f5..cf89866b 100644
Binary files a/notes/pics/fencing-token.png and b/notes/pics/fencing-token.png differ
diff --git a/notes/pics/paxos-example.png b/notes/pics/paxos-example.png
index c56f1235..179cba73 100644
Binary files a/notes/pics/paxos-example.png and b/notes/pics/paxos-example.png differ
diff --git a/notes/pics/rocketmq-transaction.png b/notes/pics/rocketmq-transaction.png
index 5c2731b8..721352d1 100644
Binary files a/notes/pics/rocketmq-transaction.png and b/notes/pics/rocketmq-transaction.png differ
diff --git a/notes/pics/rpc-call.png b/notes/pics/rpc-call.png
index aed2d4e2..1c134c8c 100644
Binary files a/notes/pics/rpc-call.png and b/notes/pics/rpc-call.png differ
diff --git a/notes/pics/saga.png b/notes/pics/saga.png
index 71924fab..813b7fdf 100644
Binary files a/notes/pics/saga.png and b/notes/pics/saga.png differ
diff --git a/tools/diagram/src/fencing-token.svg b/tools/diagram/src/fencing-token.svg
index 589d8d6e..57715a04 100644
--- a/tools/diagram/src/fencing-token.svg
+++ b/tools/diagram/src/fencing-token.svg
@@ -1,23 +1,23 @@
 <svg xmlns="http://www.w3.org/2000/svg" width="600" height="448" viewBox="0 0 600 448">
   <style>
-    text { font-family: "PingFang SC", "Microsoft YaHei", Helvetica, Arial, sans-serif; fill: #666; font-size: 13px; }
+    text { font-family: "PingFang SC", "Microsoft YaHei", Helvetica, Arial, sans-serif; fill: #3F3F3F; font-size: 13px; }
     .head { font-weight: bold; text-anchor: middle; }
     .msg { text-anchor: middle; font-size: 12px; }
     .note { font-size: 12px; fill: #C0605A; }
     .ok { fill: #6A9F68; }
-    .title { font-weight: bold; font-size: 15px; fill: #777; text-anchor: middle; }
+    .title { font-weight: bold; font-size: 15px; fill: #333; text-anchor: middle; }
     .life { stroke: #BBB; stroke-width: 1; stroke-dasharray: 4 4; }
-    .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); }
     .reply { stroke-dasharray: 5 4; }
     .lost { stroke: #C0605A; marker-end: url(#x); }
     .shadow { fill: #DADADA; }
   </style>
   <defs>
     <marker id="a" viewBox="0 0 10 10" refX="9" refY="5" markerWidth="7" markerHeight="7" orient="auto">
-      <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="x" viewBox="0 0 10 10" refX="9" refY="5" markerWidth="7" markerHeight="7" orient="auto">
-      <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>
   </defs>
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@@ -26,23 +26,19 @@
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-  <rect x="49" y="45" width="82" height="30" rx="6" fill="#B0E3E6"/>
+  <rect x="49" y="45" width="82" height="30" rx="6" fill="#C6ECE9" stroke="#7DBCB7"/>
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-  <rect x="194" y="45" width="72" height="30" rx="6" fill="#B1DDF0"/>
+  <rect x="194" y="45" width="72" height="30" rx="6" fill="#C6E4FB" stroke="#7FB2D6"/>
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-  <rect x="329" y="45" width="82" height="30" rx="6" fill="#B0E3E6"/>
+  <rect x="329" y="45" width="82" height="30" rx="6" fill="#C6ECE9" stroke="#7DBCB7"/>
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-  <rect x="474" y="45" width="72" height="30" rx="6" fill="#B1DDF0"/>
+  <rect x="474" y="45" width="72" height="30" rx="6" fill="#C6E4FB" stroke="#7FB2D6"/>
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   <line x1="226" y1="134" x2="94" y2="134" class="arrow reply"/>
   <text x="160" y="128" class="msg">成功，令牌 33</text>
-  <rect x="85" y="158" width="10" height="150" fill="#DDD7F6" stroke="#9188D8"/>
+  <rect x="85" y="158" width="10" height="150" fill="#E6E3FA" stroke="#9F94D5"/>
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   <text x="78" y="172" class="note" text-anchor="end">GC 停顿</text>
   <text x="240" y="206" class="note" text-anchor="start">锁过期</text>
diff --git a/tools/diagram/src/paxos-example.svg b/tools/diagram/src/paxos-example.svg
index 18892f67..706a00cc 100644
--- a/tools/diagram/src/paxos-example.svg
+++ b/tools/diagram/src/paxos-example.svg
@@ -1,23 +1,23 @@
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   <style>
-    text { font-family: "PingFang SC", "Microsoft YaHei", Helvetica, Arial, sans-serif; fill: #666; font-size: 13px; }
+    text { font-family: "PingFang SC", "Microsoft YaHei", Helvetica, Arial, sans-serif; fill: #3F3F3F; font-size: 13px; }
     .head { font-weight: bold; text-anchor: middle; }
     .msg { text-anchor: middle; font-size: 12px; }
     .note { font-size: 12px; fill: #C0605A; }
     .ok { fill: #6A9F68; }
-    .title { font-weight: bold; font-size: 15px; fill: #777; text-anchor: middle; }
+    .title { font-weight: bold; font-size: 15px; fill: #333; text-anchor: middle; }
     .life { stroke: #BBB; stroke-width: 1; stroke-dasharray: 4 4; }
-    .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); }
     .reply { stroke-dasharray: 5 4; }
     .lost { stroke: #C0605A; marker-end: url(#x); }
     .shadow { fill: #DADADA; }
   </style>
   <defs>
     <marker id="a" viewBox="0 0 10 10" refX="9" refY="5" markerWidth="7" markerHeight="7" orient="auto">
-      <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="x" viewBox="0 0 10 10" refX="9" refY="5" markerWidth="7" markerHeight="7" orient="auto">
-      <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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@@ -27,20 +27,15 @@
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-  <rect x="12" y="45" width="104" height="30" rx="6" fill="#B0E3E6"/>
+  <rect x="12" y="45" width="104" height="30" rx="6" fill="#C6ECE9" stroke="#7DBCB7"/>
   <text x="64" y="64.5" class="head">Proposer A</text>
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-  <rect x="140" y="45" width="104" height="30" rx="6" fill="#B1DDF0"/>
+  <rect x="140" y="45" width="104" height="30" rx="6" fill="#C6E4FB" stroke="#7FB2D6"/>
   <text x="192" y="64.5" class="head">Acceptor X</text>
-  <rect x="270" y="47" width="104" height="30" rx="6" class="shadow"/>
-  <rect x="268" y="45" width="104" height="30" rx="6" fill="#B1DDF0"/>
+  <rect x="268" y="45" width="104" height="30" rx="6" fill="#C6E4FB" stroke="#7FB2D6"/>
   <text x="320" y="64.5" class="head">Acceptor Y</text>
-  <rect x="398" y="47" width="104" height="30" rx="6" class="shadow"/>
-  <rect x="396" y="45" width="104" height="30" rx="6" fill="#B1DDF0"/>
+  <rect x="396" y="45" width="104" height="30" rx="6" fill="#C6E4FB" stroke="#7FB2D6"/>
   <text x="448" y="64.5" class="head">Acceptor Z</text>
-  <rect x="526" y="47" width="104" height="30" rx="6" class="shadow"/>
-  <rect x="524" y="45" width="104" height="30" rx="6" fill="#B0E3E6"/>
+  <rect x="524" y="45" width="104" height="30" rx="6" fill="#C6ECE9" stroke="#7DBCB7"/>
   <text x="576" y="64.5" class="head">Proposer B</text>
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   <text x="128" y="94" class="msg">Prepare(2)</text>
diff --git a/tools/diagram/src/rocketmq-transaction.svg b/tools/diagram/src/rocketmq-transaction.svg
index 709ef781..7a2ea746 100644
--- a/tools/diagram/src/rocketmq-transaction.svg
+++ b/tools/diagram/src/rocketmq-transaction.svg
@@ -1,23 +1,23 @@
 <svg xmlns="http://www.w3.org/2000/svg" width="600" height="408" viewBox="0 0 600 408">
   <style>
-    text { font-family: "PingFang SC", "Microsoft YaHei", Helvetica, Arial, sans-serif; fill: #666; font-size: 13px; }
+    text { font-family: "PingFang SC", "Microsoft YaHei", Helvetica, Arial, sans-serif; fill: #3F3F3F; font-size: 13px; }
     .head { font-weight: bold; text-anchor: middle; }
     .msg { text-anchor: middle; font-size: 12px; }
     .note { font-size: 12px; fill: #C0605A; }
     .ok { fill: #6A9F68; }
-    .title { font-weight: bold; font-size: 15px; fill: #777; text-anchor: middle; }
+    .title { font-weight: bold; font-size: 15px; fill: #333; text-anchor: middle; }
     .life { stroke: #BBB; stroke-width: 1; stroke-dasharray: 4 4; }
-    .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); }
     .reply { stroke-dasharray: 5 4; }
     .lost { stroke: #C0605A; marker-end: url(#x); }
     .shadow { fill: #DADADA; }
   </style>
   <defs>
     <marker id="a" viewBox="0 0 10 10" refX="9" refY="5" markerWidth="7" markerHeight="7" orient="auto">
-      <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="x" viewBox="0 0 10 10" refX="9" refY="5" markerWidth="7" markerHeight="7" orient="auto">
-      <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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   </defs>
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@@ -25,14 +25,11 @@
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-  <rect x="66" y="47" width="72" height="30" rx="6" class="shadow"/>
-  <rect x="64" y="45" width="72" height="30" rx="6" fill="#B0E3E6"/>
+  <rect x="64" y="45" width="72" height="30" rx="6" fill="#C6ECE9" stroke="#7DBCB7"/>
   <text x="100" y="64.5" class="head">生产者</text>
-  <rect x="266" y="47" width="72" height="30" rx="6" class="shadow"/>
-  <rect x="264" y="45" width="72" height="30" rx="6" fill="#B1DDF0"/>
+  <rect x="264" y="45" width="72" height="30" rx="6" fill="#C6E4FB" stroke="#7FB2D6"/>
   <text x="300" y="64.5" class="head">Broker</text>
-  <rect x="466" y="47" width="72" height="30" rx="6" class="shadow"/>
-  <rect x="464" y="45" width="72" height="30" rx="6" fill="#B0E3E6"/>
+  <rect x="464" y="45" width="72" height="30" rx="6" fill="#C6ECE9" stroke="#7DBCB7"/>
   <text x="500" y="64.5" class="head">消费者</text>
   <line x1="104" y1="100" x2="296" y2="100" class="arrow"/>
   <text x="200" y="94" class="msg">① 发送半消息</text>
diff --git a/tools/diagram/src/rpc-call.svg b/tools/diagram/src/rpc-call.svg
index 15422027..67084430 100644
--- a/tools/diagram/src/rpc-call.svg
+++ b/tools/diagram/src/rpc-call.svg
@@ -1,42 +1,42 @@
 <svg xmlns="http://www.w3.org/2000/svg" width="740" height="400" viewBox="0 0 740 400">
   <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); }
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     .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; }
   </style>
   <defs>
     <marker id="a" 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="#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"/>
     </marker>
   </defs>
   <rect width="100%" height="100%" fill="#FFFFFF"/>
 
   <text x="370" y="28" class="title">一次 RPC 调用</text>
-  <rect x="285" y="44" width="170" height="70" rx="5" fill="#E6E6E6" stroke="#B5B5B5" stroke-width="1.2"/>
-  <rect x="285" y="44" width="170" height="22" rx="5" fill="#B5B5B5" opacity="0.35"/>
+  <rect x="285" y="44" width="170" height="70" rx="5" fill="#EAE9E7" stroke="#BFBEBA" stroke-width="1.2"/>
+  <rect x="285" y="44" width="170" height="22" rx="5" fill="#BFBEBA" opacity="0.35"/>
   <text x="370" y="59" class="c b">注册中心</text>
-  <rect x="291" y="72" width="158" height="16" rx="3" fill="#FFFFFF" stroke="#B5B5B5" stroke-width="0.6"/>
+  <rect x="291" y="72" width="158" height="16" rx="3" fill="#FFFFFF" stroke="#BFBEBA" stroke-width="0.6"/>
   <text x="297" y="84" class="sub">库存服务 10.0.0.8</text>
-  <rect x="291" y="92" width="158" height="16" rx="3" fill="#FFFFFF" stroke="#B5B5B5" stroke-width="0.6"/>
+  <rect x="291" y="92" width="158" height="16" rx="3" fill="#FFFFFF" stroke="#BFBEBA" stroke-width="0.6"/>
   <text x="297" y="104" class="sub">库存服务 10.0.0.9</text>
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   <text x="30" y="188" class="b">订单服务（调用方）</text>
@@ -50,15 +50,15 @@
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   <text x="460" y="188" class="b">库存服务（服务方）</text>
-  <rect x="477" y="214" width="46" height="13" rx="3" fill="#B1DDF0" stroke="#7FB4D0" stroke-width="1.2"/>
-  <circle cx="484" cy="220.5" r="2" fill="#7FB4D0"/>
-  <line x1="491" y1="220.5" x2="516" y2="220.5" stroke="#7FB4D0" stroke-width="1"/>
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-  <line x1="491" y1="252.5" x2="516" y2="252.5" stroke="#7FB4D0" stroke-width="1"/>
+  <rect x="477" y="214" width="46" height="13" rx="3" fill="#C6E4FB" stroke="#7FB2D6" stroke-width="1.2"/>
+  <circle cx="484" cy="220.5" r="2" fill="#7FB2D6"/>
+  <line x1="491" y1="220.5" x2="516" y2="220.5" stroke="#7FB2D6" stroke-width="1"/>
+  <rect x="477" y="230" width="46" height="13" rx="3" fill="#C6E4FB" stroke="#7FB2D6" stroke-width="1.2"/>
+  <circle cx="484" cy="236.5" r="2" fill="#7FB2D6"/>
+  <line x1="491" y1="236.5" x2="516" y2="236.5" stroke="#7FB2D6" stroke-width="1"/>
+  <rect x="477" y="246" width="46" height="13" rx="3" fill="#C6E4FB" stroke="#7FB2D6" stroke-width="1.2"/>
+  <circle cx="484" cy="252.5" r="2" fill="#7FB2D6"/>
+  <line x1="491" y1="252.5" x2="516" y2="252.5" stroke="#7FB2D6" stroke-width="1"/>
   <text x="536" y="226" class="sub">解码请求帧，</text>
   <text x="536" y="244" class="sub">通过反射调用</text>
   <text x="536" y="262" class="sub mono">InventoryServiceImpl</text>
@@ -70,8 +70,8 @@
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   <line x1="442" y1="229" x2="486" y2="229" class="arrow "/>
   <text x="370" y="206" class="c sub">② 请求帧：请求 ID + 方法 + 参数</text>
-  <rect x="300" y="300" width="140" height="30" rx="3" fill="#DDD7F6" stroke="#A99FD8" stroke-width="1.2"/>
-  <path d="M300,301 L314,311 L328,301" fill="none" stroke="#A99FD8" stroke-width="1"/>
+  <rect x="300" y="300" width="140" height="30" rx="3" fill="#E6E3FA" stroke="#B8B0DE" stroke-width="1.2"/>
+  <path d="M300,301 L314,311 L328,301" fill="none" stroke="#B8B0DE" stroke-width="1"/>
   <text x="334" y="319" class="sub mono">ID 7 true</text>
   <line x1="486" y1="315" x2="442" y2="315" class="arrow "/>
   <line x1="298" y1="315" x2="278" y2="315" class="arrow "/>
diff --git a/tools/diagram/src/saga.svg b/tools/diagram/src/saga.svg
index 08102a41..e5d2668f 100644
--- a/tools/diagram/src/saga.svg
+++ b/tools/diagram/src/saga.svg
@@ -1,56 +1,51 @@
 <svg xmlns="http://www.w3.org/2000/svg" width="600" height="220" viewBox="0 0 600 220">
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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; }
     .frame { fill: none; stroke: #999; stroke-width: 1; stroke-dasharray: 4 3; }
     .shadow { fill: #DADADA; }
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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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   <rect width="100%" height="100%" fill="#FFFFFF"/>
 
   <text x="300" y="28" class="title">Saga</text>
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-  <rect x="70" y="60" width="110" height="40" rx="6" fill="#B1DDF0"/>
+  <rect x="70" y="60" width="110" height="40" rx="6" fill="#C6E4FB" stroke="#7FB2D6"/>
   <text x="125" y="78" class="b c">T1</text>
   <text x="125" y="93" class="sub c">本地事务提交</text>
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-  <rect x="230" y="60" width="110" height="40" rx="6" fill="#B1DDF0"/>
+  <rect x="230" y="60" width="110" height="40" rx="6" fill="#C6E4FB" stroke="#7FB2D6"/>
   <text x="285" y="78" class="b c">T2</text>
   <text x="285" y="93" class="sub c">本地事务提交</text>
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   <rect x="390" y="60" width="110" height="40" rx="6" fill="#F3C6C2"/>
   <text x="445" y="78" class="b c">T3</text>
   <text x="445" y="93" class="sub c">失败</text>
   <line x1="183" y1="80" x2="227" y2="80" class="arrow "/>
   <line x1="343" y1="80" x2="387" y2="80" class="arrow "/>
-  <rect x="72" y="152" width="110" height="40" rx="6" class="shadow"/>
-  <rect x="70" y="150" width="110" height="40" rx="6" fill="#B0E3E6"/>
+  <rect x="70" y="150" width="110" height="40" rx="6" fill="#C6ECE9" stroke="#7DBCB7"/>
   <text x="125" y="168" class="b c">C1</text>
   <text x="125" y="183" class="sub c">补偿 T1</text>
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-  <rect x="230" y="150" width="110" height="40" rx="6" fill="#B0E3E6"/>
+  <rect x="230" y="150" width="110" height="40" rx="6" fill="#C6ECE9" stroke="#7DBCB7"/>
   <text x="285" y="168" class="b c">C2</text>
   <text x="285" y="183" class="sub c">补偿 T2</text>
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