fix(ui): align binding headers and unify handoff buttons

banban-mini/src/pages/bind/index.scss

@@ -1,3 +1,5 @@
+@import '../../styles/binding-controls';
+
 .bind-page {
   min-height: 100%;
   background: #F5F7FA;
@@ -28,12 +30,13 @@
 .bind-header {
   padding: 80px 32px 32px;
   position: relative;
+  box-sizing: border-box;
   text-align: center;
 
   .back-btn {
-    position: absolute;
-    left: 32px;
-    top: 80px;
+    position: static;
+    flex-shrink: 0;
+    box-sizing: border-box;
     display: flex;
     align-items: center;
     padding: 12px 18px;
@@ -53,14 +56,6 @@
     color: #1A1A1A;
     font-weight: 500;
   }
-
-  .title {
-    font-size: 44px;
-    font-weight: 700;
-    color: #1A1A1A;
-    display: block;
-    padding: 0 120px;
-  }
 }
 
 .scan-area {
@@ -411,11 +406,7 @@
 .bind-countdown-label { margin-top: 12px; font-size: 22px; color: #aa8154; }
 .bind-instruction { padding: 28px; border: 2px solid #d2b48c; border-radius: 46px; background: #fffdf7; }
 .bind-instruction-title { font-size: 34px; font-weight: 600; color: #895731; }
-.bind-result-button { min-height: 92px; margin-top: 28px; border-radius: 46px; display: flex; align-items: center; justify-content: center; font-size: 30px; font-weight: 600; box-sizing: border-box; }
-.bind-result-button::after { display: none; }
-.bind-result-button.primary { background: linear-gradient(#ffce8d, #efa05a); border: 2px solid #cf935a; color: #895731; }
-.bind-result-button.secondary { background: #fffdf7; border: 2px solid #cf935a; color: #ad8054; }
-.bind-result-button.waiting { background: linear-gradient(#eeede9, #c9c7c1); border: 2px solid #aaa69c; color: #777168; }
+.bind-result-button { @include binding-action-button; }
 .bind-device-summary { margin-top: 32px; padding: 12px 28px; border: 2px solid #d2b48c; border-radius: 28px; background: #fffdf7; text-align: left; }
 .bind-device-row { display: flex; align-items: center; justify-content: space-between; padding: 20px 0; color: #a68d74; font-size: 26px; }
 .bind-device-row + .bind-device-row { border-top: 1px solid #eee3d5; }