diff --git a/static/app.js b/static/app.js
index 8c5d65f..2d215a3 100644
--- a/static/app.js
+++ b/static/app.js
@@ -12,6 +12,18 @@ function number(value, digits = 0) {
   return Number(value).toLocaleString('zh-CN', { maximumFractionDigits: digits, minimumFractionDigits: digits })
 }
 
+function usd(value, digits = 3) {
+  const numeric = Number(value)
+  if (value === null || value === undefined || !Number.isFinite(numeric)) return '<span class="usd-value is-empty">—</span>'
+  const formatter = new Intl.NumberFormat('zh-CN', { maximumFractionDigits: digits, minimumFractionDigits: digits })
+  const parts = formatter.formatToParts(numeric)
+  const whole = parts.filter(({ type }) => ['minusSign', 'plusSign', 'integer', 'group'].includes(type)).map(({ value: part }) => part).join('')
+  const point = parts.find(({ type }) => type === 'decimal')?.value ?? '.'
+  const fraction = parts.find(({ type }) => type === 'fraction')?.value ?? ''.padEnd(digits, '0')
+  const label = `$${formatter.format(numeric)}`
+  return `<span class="usd-value" aria-label="${escapeHtml(label)}"><span class="usd-symbol" aria-hidden="true">$</span><span class="usd-whole" aria-hidden="true">${escapeHtml(whole)}</span><span class="usd-point" aria-hidden="true">${escapeHtml(point)}</span><span class="usd-fraction" aria-hidden="true">${escapeHtml(fraction)}</span></span>`
+}
+
 function compact(value) {
   if (value === null || value === undefined) return '—'
   return new Intl.NumberFormat('zh-CN', { notation: 'compact', maximumFractionDigits: 2 }).format(Number(value))
@@ -134,7 +146,7 @@ function renderScoreRows() {
       <td>${row.ttftP95Ms == null ? '—' : `${number(row.ttftP95Ms)} ms`}</td>
       <td>${compact(usage.requestCount)}</td>
       <td>${compact(usage.tokenCount)}</td>
-      <td>${usage.apiAmountUsd == null ? '—' : `$${number(usage.apiAmountUsd, 3)}`}</td>
+      <td class="usd-cell">${usd(usage.apiAmountUsd)}</td>
       <td>${number(row.failoverRecovered)} / ${number(row.failoverRequests)}</td>
       <td><span class="availability ${row.currentlyAvailable ? 'is-up' : 'is-down'}">${row.currentlyAvailable ? '可用' : '不可用'}</span></td>
     </tr>`
@@ -180,10 +192,10 @@ async function rankingPage() {
   const data = await requestJson('/api/ranking')
   const ranking = data.ranking
   $('#ranking-range').textContent = `${ranking.startDate} 至 ${ranking.endDate}`
-  $('#ranking-cost').textContent = `$${number(ranking.totals.actualCost, 3)}`
+  $('#ranking-cost').innerHTML = usd(ranking.totals.actualCost)
   $('#ranking-requests').textContent = compact(ranking.totals.requests)
   $('#ranking-tokens').textContent = compact(ranking.totals.tokens)
-  $('#ranking-body').innerHTML = ranking.rows.length ? ranking.rows.map((row) => `<tr><td>${String(row.rank).padStart(2, '0')}</td><td class="account-cell"><b>${escapeHtml(row.displayName)}</b></td><td>$${number(row.actualCost, 3)}</td><td>${compact(row.requests)}</td><td>${compact(row.tokens)}</td></tr>`).join('') : '<tr><td colspan="5" class="empty">当前窗口暂无用量</td></tr>'
+  $('#ranking-body').innerHTML = ranking.rows.length ? ranking.rows.map((row) => `<tr><td>${String(row.rank).padStart(2, '0')}</td><td class="account-cell"><b>${escapeHtml(row.displayName)}</b></td><td class="usd-cell">${usd(row.actualCost)}</td><td>${compact(row.requests)}</td><td>${compact(row.tokens)}</td></tr>`).join('') : '<tr><td colspan="5" class="empty">当前窗口暂无用量</td></tr>'
 }
 
 function creditLabel(status) {
diff --git a/static/ranking.html b/static/ranking.html
index e8b8b15..85316cf 100644
--- a/static/ranking.html
+++ b/static/ranking.html
@@ -13,7 +13,7 @@
   <main class="workspace">
     <header class="page-head"><div><p class="eyebrow">USER FLOW / DAILY</p><h1>用户用量</h1></div><span id="ranking-range" class="state-badge">读取中</span></header>
     <section class="metric-strip"><div><span>标准 API 用量</span><strong id="ranking-cost">—</strong></div><div><span>请求</span><strong id="ranking-requests">—</strong></div><div><span>Token</span><strong id="ranking-tokens">—</strong></div></section>
-    <section class="table-section"><div class="table-wrap"><table class="data-table"><thead><tr><th>名次</th><th>用户</th><th>API USD</th><th>请求</th><th>Token</th></tr></thead><tbody id="ranking-body"><tr><td colspan="5" class="empty">正在读取用量...</td></tr></tbody></table></div></section>
+    <section class="table-section"><div class="table-wrap"><table class="data-table"><thead><tr><th>名次</th><th>用户</th><th class="usd-cell">API USD</th><th>请求</th><th>Token</th></tr></thead><tbody id="ranking-body"><tr><td colspan="5" class="empty">正在读取用量...</td></tr></tbody></table></div></section>
   </main>
 </body>
 </html>
diff --git a/static/scores.html b/static/scores.html
index 54a44c0..dc6164b 100644
--- a/static/scores.html
+++ b/static/scores.html
@@ -36,7 +36,7 @@
       </div>
       <div class="table-wrap">
         <table class="data-table" aria-label="所有分组账号评分">
-          <thead><tr><th>账号</th><th>分组</th><th>优先级</th><th>评分</th><th>等级</th><th>置信度</th><th>尝试</th><th>失败率</th><th>TTFT P95</th><th>请求</th><th>Token</th><th>API USD</th><th>切号恢复</th><th>可用</th></tr></thead>
+          <thead><tr><th>账号</th><th>分组</th><th>优先级</th><th>评分</th><th>等级</th><th>置信度</th><th>尝试</th><th>失败率</th><th>TTFT P95</th><th>请求</th><th>Token</th><th class="usd-cell">API USD</th><th>切号恢复</th><th>可用</th></tr></thead>
           <tbody id="score-body"><tr><td colspan="14" class="empty">正在读取评分快照...</td></tr></tbody>
         </table>
       </div>
diff --git a/static/styles.css b/static/styles.css
index e974a87..0ee9f15 100644
--- a/static/styles.css
+++ b/static/styles.css
@@ -67,6 +67,14 @@ button:disabled { cursor: wait; opacity: .48; }
 .data-table th { height: 40px; padding: 0 12px; position: sticky; top: 0; z-index: 1; text-align: left; white-space: nowrap; background: var(--surface-raised); color: var(--muted); font: 10px/1 var(--mono); border-bottom: 1px solid var(--line); }
 .data-table td { height: 52px; padding: 8px 12px; border-bottom: 1px solid var(--line); white-space: nowrap; }
 .data-table tbody tr:hover { background: rgba(185,228,71,.045); }
+.usd-cell { text-align: right !important; }
+.usd-value { display: inline-grid; grid-template-columns: 1ch 9ch .65ch 3ch; justify-content: end; align-items: baseline; font-family: var(--mono); font-variant-numeric: tabular-nums; white-space: nowrap; }
+.usd-symbol { color: var(--muted); text-align: left; }
+.usd-whole { color: var(--paper); text-align: right; font-weight: 650; }
+.usd-point, .usd-fraction { color: var(--info); }
+.usd-point { text-align: center; }
+.usd-fraction { text-align: left; font-weight: 550; }
+.usd-value.is-empty { display: inline-block; width: 13.65ch; color: var(--muted); text-align: right; }
 .account-cell { min-width: 230px; }
 .account-cell b { display: block; max-width: 360px; overflow: hidden; text-overflow: ellipsis; }
 .account-cell small { display: block; color: var(--muted); margin-top: 4px; font: 10px/1 var(--mono); }