feat: 使用 Pencil 优化首页 UI

app/static/app.css

@@ -146,6 +146,18 @@ a {
   padding: 30px;
 }
 
+.hero-band-inverse {
+  background: #111827;
+  border-color: #111827;
+  border-radius: 0;
+  box-shadow: none;
+  color: #ffffff;
+  margin-left: calc(50% - 50vw);
+  margin-right: calc(50% - 50vw);
+  margin-top: -1.5rem;
+  padding: 42px max(48px, calc((100vw - 1180px) / 2 + 24px));
+}
+
 .hero-shell {
   align-items: flex-end;
   display: flex;
@@ -166,6 +178,12 @@ a {
   margin: 0 0 12px;
 }
 
+.hero-band-inverse .hero-copy h1 {
+  color: #ffffff;
+  font-size: 42px;
+  max-width: 720px;
+}
+
 .hero-copy p:not(.eyebrow) {
   color: var(--muted-foreground);
   font-size: 15px;
@@ -173,6 +191,16 @@ a {
   margin: 0;
 }
 
+.hero-band-inverse .eyebrow {
+  color: #9ca3af;
+  font-family: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
+}
+
+.hero-band-inverse .hero-copy p:not(.eyebrow) {
+  color: #d1d5db;
+  max-width: 680px;
+}
+
 .hero-metrics {
   display: grid;
   gap: 10px;
@@ -180,6 +208,13 @@ a {
   min-width: 320px;
 }
 
+.hero-data-grid {
+  border: 1px solid #374151;
+  gap: 0;
+  grid-template-columns: repeat(3, minmax(120px, 1fr));
+  min-width: 420px;
+}
+
 .hero-metric {
   background: var(--muted);
   border: 1px solid var(--border);
@@ -187,12 +222,31 @@ a {
   padding: 12px;
 }
 
+.hero-band-inverse .hero-metric {
+  background: transparent;
+  border: 0;
+  border-right: 1px solid #374151;
+  border-radius: 0;
+  padding: 18px 20px;
+}
+
+.hero-band-inverse .hero-metric:last-child {
+  border-right: 0;
+}
+
 .hero-metric strong {
   display: block;
   font-size: 18px;
   line-height: 1.2;
 }
 
+.hero-band-inverse .hero-metric strong {
+  color: #ffffff;
+  font-family: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
+  font-size: 30px;
+  font-weight: 700;
+}
+
 .hero-metric span {
   color: var(--muted-foreground);
   display: block;
@@ -200,6 +254,53 @@ a {
   margin-top: 4px;
 }
 
+.hero-band-inverse .hero-metric span {
+  color: #9ca3af;
+}
+
+.task-workspace {
+  display: grid;
+  gap: 24px;
+  margin-top: 28px;
+}
+
+.hard-panel {
+  border-radius: 0;
+  box-shadow: none;
+}
+
+.panel-heading {
+  padding: 18px 24px;
+}
+
+.panel-note {
+  color: var(--muted-foreground);
+  font-size: 13px;
+}
+
+.scale-hint-panel {
+  border-top: 1px solid var(--border);
+  color: var(--muted-foreground);
+  font-size: 13px;
+  margin: 20px -20px -20px;
+  padding: 14px 20px;
+}
+
+.data-grid-table {
+  min-width: 1120px;
+}
+
+.data-grid-table thead th {
+  height: 48px;
+  padding-left: 16px;
+  padding-right: 16px;
+}
+
+.data-grid-table td {
+  padding-left: 16px;
+  padding-right: 16px;
+}
+
 .btn {
   border-radius: 6px;
   font-size: 14px;
@@ -496,6 +597,10 @@ a {
     min-width: 0;
     width: 100%;
   }
+
+  .hero-data-grid {
+    min-width: 0;
+  }
 }
 
 @media (max-width: 768px) {
@@ -508,14 +613,33 @@ a {
     padding: 22px;
   }
 
+  .hero-band-inverse {
+    margin-left: -14px;
+    margin-right: -14px;
+    padding: 28px 22px;
+  }
+
   .hero-copy h1 {
     font-size: 28px;
   }
 
+  .hero-band-inverse .hero-copy h1 {
+    font-size: 30px;
+  }
+
   .hero-metrics {
     grid-template-columns: 1fr;
   }
 
+  .hero-band-inverse .hero-metric {
+    border-bottom: 1px solid #374151;
+    border-right: 0;
+  }
+
+  .hero-band-inverse .hero-metric:last-child {
+    border-bottom: 0;
+  }
+
   .section-heading,
   .page-heading,
   .content-item-row {