优化后台提示展示与聊天室公告样式

resources/views/chat/partials/scripts.blade.php

@@ -1140,7 +1140,7 @@
             if (msg.from_user === '系统公告') {
                 // 管理员公告：大字醒目红框样式
                 div.style.cssText =
-                    'background: linear-gradient(135deg, #fef2f2, #fff1f2); border: 2px solid #ef4444; border-radius: 6px; padding: 8px 12px; margin: 4px 0; box-shadow: 0 2px 4px rgba(239,68,68,0.15);';
+                    'background: linear-gradient(135deg, #fef2f2, #fff1f2); border: 2px solid #ef4444; border-radius: 8px; padding: 10px 14px; margin: 6px 0; box-shadow: 0 3px 8px rgba(239,68,68,0.16);';
 
                 let parsedContent = msg.content;
                 parsedContent = parsedContent.replace(/【([^】]+)】/g, function(match, uName) {
@@ -1148,7 +1148,7 @@
                 });
 
                 html =
-                    `<div style="font-weight: bold; color: #dc2626;">${parsedContent} <span style="color: #999; font-weight: normal;">(${timeStr})</span></div>`;
+                    `<div style="font-size: 18px; line-height: 1.75; font-weight: 800; color: #dc2626;">${parsedContent} <span style="color: #999; font-size: 14px; font-weight: 500;">(${timeStr})</span></div>`;
                 timeStrOverride = true;
             } else if (msg.from_user === '系统传音') {
                 // 自动升级播报 / 赠礼通知 / 彩票购买广播：金色左边框，轻量提示样式，不喧宾夺主