百家乐押注按钮改为对象式:style绑定，参照求婚弹窗风格：未选择时灰色+不可点击，正常时紫色渐变+阴影

resources/views/chat/partials/baccarat-panel.blade.php

@@ -167,12 +167,22 @@
 
                         {{-- 下注按钮 --}}
                         <button x-on:click="submitBet()" :disabled="!selectedType || betAmount < 100 || submitting"
-                            style="width:100%; border:none; border-radius:12px; padding:13px; font-size:14px;
-                                   font-weight:bold; cursor:pointer; transition:all .15s; letter-spacing:1px;"
-                            :style="(!selectedType || betAmount < 100 || submitting) ?
-                            'background:rgba(255,255,255,.1); color:rgba(255,255,255,.3); cursor:not-allowed;' :
-                            'background:linear-gradient(135deg,#7c3aed,#4f46e5); color:#fff; box-shadow:0 4px 20px rgba(124,58,237,.4);'"
-                            x-text="submitting ? '提交中…' : ('🎲 押注「' + betTypeLabel(selectedType) + '」' + (betAmount > 0 ? ' ' + Number(betAmount).toLocaleString() + ' 金币' : ''))">
+                            style="width:100%; border:none; border-radius:12px; padding:14px;
+                                   font-size:15px; font-weight:bold; cursor:pointer; transition:all .2s;
+                                   letter-spacing:1px;"
+                            :style="(!selectedType || betAmount < 100 || submitting) ? {
+                                background: '#f1f5f9',
+                                color: '#94a3b8',
+                                cursor: 'not-allowed',
+                                boxShadow: 'none'
+                            } : {
+                                background: 'linear-gradient(135deg,#6d28d9,#7c3aed,#8b5cf6)',
+                                color: '#fff',
+                                cursor: 'pointer',
+                                boxShadow: '0 4px 16px rgba(124,58,237,0.5)'
+                            }">
+                            <span
+                                x-text="submitting ? '提交中…' : (!selectedType ? '请先选择大/小/豹子' : '🎲 押注「' + betTypeLabel(selectedType) + '」 ' + Number(betAmount).toLocaleString() + ' 金币')"></span>
                         </button>
                     </div>