diff --git a/mailer.py b/mailer.py
index 5813e1f..f34f380 100644
--- a/mailer.py
+++ b/mailer.py
@@ -568,11 +568,14 @@ def _render_html(data: dict, base_url: str) -> str:
     # 24h 趋势 HTML
     if data["stats_24h"]:
         s = data["stats_24h"]
+        # 进度条: 用 table 实现 (Gmail 兼容), 宽 200px, 蓝色按利用率百分比填充
         sample_rows = "".join(
             f'<tr><td style="padding:4px 12px;font-family:monospace">{_fmt_ts(smp.timestamp, "%m-%d %H:%M")}</td>'
             f'<td style="padding:4px 12px;text-align:right;font-weight:bold">{smp.utilization:.1f}%</td>'
             f'<td style="padding:4px 12px">'
-            f'<span style="background:#007bff;color:#fff;padding:2px 6px;border-radius:2px;font-size:11px;font-weight:bold">{smp.utilization:.1f}%</span>'
+            f'<table style="width:200px;background:#e0e0e0;border-radius:2px;height:8px">'
+            f'<tr><td style="width:{max(0, min(200, int(round(smp.utilization / 100 * 200))))}px;background:{DOMAIN_COLORS.get("downloaded", "#007bff")};border-radius:2px;height:8px"></td></tr>'
+            f'</table>'
             f'</td></tr>'
             for smp in data["samples_24h"]
         )