添加 hallmark 技能

skills/hallmark/references/components/t4-numbered-stat-strip.md

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+### T4 · Numbered stat strip
+A horizontal strip of 3–5 stats (count + qualifier) running across one row. Tabular nums.
+*Use when:* you have multiple complementary metrics that work together.
+*Don't confuse with:* H4 Stat-led hero (which is one focal number, not several).
+
+```html
+<section class="stat-strip tnum">
+  <div><b>2.4M</b><span>users</span></div>
+  <div><b>99.97%</b><span>uptime</span></div>
+  <div><b>14</b><span>regions</span></div>
+</section>
+```
+
+---