fix(trip): bump stat-label to --text-sm, widen stat-value fluid range

Label: xs (12px) → sm (14px) for clearer hierarchy below the value.
Value preferred: 5.5vw → 6vw so short values stay bold on mid phones.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Vgmzx8VTTTmCskSpQtsLTr

themes/intotheeast/css/style.css

@@ -601,7 +601,7 @@ body::after {
 .stat-value {
     display: block;
     font-family: var(--font-display);
-    font-size: clamp(var(--text-lg), 5.5vw, var(--text-3xl));
+    font-size: clamp(var(--text-lg), 6vw, var(--text-3xl));
     font-weight: 400;
     color: var(--color-accent);
     line-height: 1.1;
@@ -611,7 +611,7 @@ body::after {
 
 .stat-label {
     display: block;
-    font-size: var(--text-xs);
+    font-size: var(--text-sm);
     font-weight: 600;
     color: var(--color-ink-muted);
     text-transform: uppercase;