style(Center): 新增 EventDetailModal 样式文件

- 添加事件详情弹窗的独立样式
- 配合黑金主题设计

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

src/views/Center/components/EventDetailModal.less

@@ -0,0 +1,70 @@
+/* EventDetailModal.less - 事件详情弹窗黑金主题样式 */
+
+// ==================== 变量定义 ====================
+@color-bg-deep: #0A0A14;
+@color-bg-primary: #0F0F1A;
+@color-bg-elevated: #1A1A2E;
+
+@color-gold-400: #D4AF37;
+@color-gold-500: #B8960C;
+@color-gold-gradient: linear-gradient(135deg, #D4AF37 0%, #F5E6A3 100%);
+
+@color-line-subtle: rgba(212, 175, 55, 0.1);
+@color-line-default: rgba(212, 175, 55, 0.2);
+
+@color-text-primary: rgba(255, 255, 255, 0.95);
+@color-text-secondary: rgba(255, 255, 255, 0.6);
+
+// ==================== 全局 Modal 遮罩层样式 ====================
+.event-detail-modal-root {
+  .ant-modal-mask {
+    background: rgba(0, 0, 0, 0.7) !important;
+    backdrop-filter: blur(4px);
+  }
+}
+
+// ==================== 主样式 ====================
+.event-detail-modal {
+  // Modal 整体
+  .ant-modal-content {
+    background: linear-gradient(135deg, @color-bg-elevated 0%, @color-bg-primary 100%) !important;
+    border: 1px solid @color-line-default;
+    border-radius: 12px;
+    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5), 0 0 24px rgba(212, 175, 55, 0.1);
+    backdrop-filter: blur(16px);
+  }
+
+  // Modal 头部
+  .ant-modal-header {
+    background: transparent !important;
+    border-bottom: 1px solid @color-line-subtle;
+    padding: 16px 24px;
+  }
+
+  // Modal 标题
+  .ant-modal-title {
+    font-size: 18px;
+    font-weight: 700;
+    background: @color-gold-gradient;
+    -webkit-background-clip: text;
+    -webkit-text-fill-color: transparent;
+    background-clip: text;
+  }
+
+  // 关闭按钮
+  .ant-modal-close {
+    color: @color-text-secondary;
+    transition: all 0.3s ease;
+
+    &:hover {
+      color: @color-gold-400;
+      background: rgba(212, 175, 55, 0.1);
+    }
+  }
+
+  // Modal 内容区域
+  .ant-modal-body {
+    padding: 16px 24px 24px;
+    background: transparent;
+  }
+}