www: 侧边栏贴屏幕最左（照搬 personal-blog 后台布局，去掉居中容器限制）

www/index.html

@@ -16,7 +16,7 @@ body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica N
 .btn-outline{background:transparent;border:1px solid #667eea;color:#667eea}
 .btn-outline:hover{background:#667eea;color:#fff}
 .btn-sm{padding:6px 14px;font-size:13px}
-.main{padding:90px 0 40px;max-width:1600px;margin:0 auto}
+.main{padding:90px 0 40px}
 .layout{display:flex;gap:24px;align-items:flex-start}
 .content{flex:1;min-width:0;padding-right:24px}
 .sidebar{width:200px;flex-shrink:0;position:sticky;top:84px;background:rgba(255,255,255,.95);border-radius:0 16px 16px 0;padding:12px;box-shadow:0 6px 14px rgba(0,0,0,.12);max-height:calc(100vh - 100px);overflow-y:auto}