diff --git a/src/animations.js b/src/animations.js
index 9a0196f..9eae7fc 100644
--- a/src/animations.js
+++ b/src/animations.js
@@ -80,7 +80,7 @@ class AnimationManager {
    * @returns {Promise} 动画完成Promise
    */
   apply(element, animationName, options = {}) {
-    return new Promise((resolve) => {
+    return new Promise((resolve, reject) => {
       const animation = this.get(animationName);
       if (!animation) {
         resolve();
@@ -123,19 +123,15 @@ class AnimationManager {
       
       // 动画完成处理
       anim.onfinish = () => {
-        // 应用最终状态
         Object.assign(element.style, config.leave);
-        
-        // 清理
         this.activeAnimations.delete(animId);
-        
         resolve();
       };
       
-      // 动画取消处理
+      // 动画取消处理 — reject 让调用者感知取消
       anim.oncancel = () => {
         this.activeAnimations.delete(animId);
-        resolve();
+        reject(new Error(`Animation "${animationName}" was cancelled`));
       };
     });
   }
diff --git a/src/core.js b/src/core.js
index 6d0220d..c1eda5d 100644
--- a/src/core.js
+++ b/src/core.js
@@ -79,6 +79,10 @@ class Toast {
     this.html = opts.html || '';
     this.iconHTML = opts.iconHTML || '';
     this.config = { ...DEFAULTS, ...opts };
+    // 防止嵌套对象被多个 toast 实例共享引用
+    if (opts.style && typeof opts.style === 'object') {
+      this.config.style = { ...opts.style };
+    }
     this.el = null;
     this.barEl = null;
     this.rafId = null;
@@ -991,13 +995,18 @@ const meToast = {
         index++;
         
         const msg = typeof message === 'string' ? message : (message?.message || '');
+        const msgObj = (typeof message === 'object' && message !== null) ? message : {};
+        const msgOnClose = msgObj.onClose;
         
         this._emit({
           ...opts,
-          ...((typeof message === 'object' && message !== null) ? message : {}),
+          ...msgObj,
           message: msg,
-          duration: opts.duration || 3000,
+          duration: msgObj.duration || opts.duration || 3000,
           onClose: (toast) => {
+            if (typeof msgOnClose === 'function') {
+              try { msgOnClose(toast); } catch (_) {}
+            }
             if (typeof userOnClose === 'function') {
               try { userOnClose(toast); } catch (_) {}
             }