fix: 修复客户评价模糊 + 工作流程卡片溢出

🐛 HomeTestimonials:
- 移除 blur 滤镜，卡片不再模糊
- 添加触摸支持（touchstart/touchmove/touchend）
- 降低拖拽阈值（100px → 50px），更灵敏
- 加快切换动画（0.8s → 0.5s）
- 添加 select-none 防止拖拽选中文本
- 鼠标样式：grab / grabbing

🐛 HomeProcess:
- 卡片宽度缩小（280/320px → 240/280px）
- 编号圆圈缩小（20/24 → 16/20）
- 图标容器缩小
- 内边距缩小（p-6/8 → p-5/6）
- 防止最后一张卡片被遮挡

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

app/components/home/HomeProcess.vue

@@ -43,13 +43,13 @@
             v-for="(step, index) in steps"
             :key="step.id"
             :ref="el => setStepRef(el, index)"
-            class="process-step flex-shrink-0 w-[280px] md:w-[320px]"
+            class="process-step flex-shrink-0 w-[240px] md:w-[280px]"
            
           >
             <!-- 步骤编号节点 -->
             <div class="relative flex justify-center mb-8">
               <div
-                class="w-20 h-20 md:w-24 md:h-24 rounded-full flex items-center justify-center text-white text-2xl md:text-3xl font-bold shadow-xl relative z-10"
+                class="w-16 h-16 md:w-20 md:h-20 rounded-full flex items-center justify-center text-white text-xl md:text-2xl font-bold shadow-xl relative z-10"
                 :class="step.gradient"
               >
                 {{ index + 1 }}
@@ -59,8 +59,8 @@
             </div>
 
             <!-- 卡片内容 -->
-            <div class="bg-white rounded-2xl p-6 md:p-8 shadow-lg hover:shadow-2xl transition-all duration-300 hover:-translate-y-2">
-              <div class="w-14 h-14 md:w-16 md:h-16 rounded-xl mb-5 flex items-center justify-center" :class="step.iconBg">
+            <div class="bg-white rounded-2xl p-5 md:p-6 shadow-lg hover:shadow-2xl transition-all duration-300 hover:-translate-y-2">
+              <div class="w-12 h-12 md:w-14 md:h-14 rounded-xl mb-4 flex items-center justify-center" :class="step.iconBg">
                 <Icon :name="step.icon" class="w-7 h-7 md:w-8 md:h-8" :class="step.iconColor" />
               </div>