fix: home visual feedback round — soft bg for features, branded placeholder, plan 10j

- advantages section gains section--soft (white cards were invisible on white)
- .pro-art placeholder redesigned: brand gradient + initials + small kind
  label, ring ornament hidden (was heavy gray block)
- plan: new Task 10j (port cms header/footer chrome visuals) per user
  feedback that overall look should match cms
- verified live: mirror build 7f1e8c47f0c4 (374/384 real images pulled,
  203 pages, 0 errors)

Co-Authored-By: Claude Code <noreply@anthropic.com>

themes/trade-pro/pages/home.html

@@ -105,7 +105,7 @@
   </div>
 </section>
 {% endif %}
-<section class="section">
+<section class="section section--soft">
   <div class="wrap">
     <div class="sf-tp-section-head" data-reveal>
       <div>

themes/trade-pro/pro.css

@@ -263,3 +263,10 @@
 .sf-theme-trade-pro .pro-footer-bottom{border-top:1px solid #24344c}
 .sf-theme-trade-pro .pro-filter-panel{border:1px solid #dfe7f2;border-radius:var(--sf-tp-radius,8px)}
 .sf-theme-trade-pro .pro-404 strong{color:var(--sf-tp-primary,#0b3d91)}
+
+/* ── 无图占位重设计（用户反馈 2026-10-23：共享宏灰块与设计不符）──
+   brand 渐变底 + 首字母 + 小型 kind 标签；环形装饰隐藏 */
+.sf-theme-trade-pro .pro-art{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:var(--sf-tp-space-2);background:linear-gradient(135deg,var(--sf-tp-color-surface-brand-soft),color-mix(in srgb,var(--sf-tp-color-brand-primary) 12%,var(--sf-tp-color-surface-default)));color:var(--sf-tp-color-text-brand)}
+.sf-theme-trade-pro .pro-art .pro-art-ring{display:none}
+.sf-theme-trade-pro .pro-art .pro-art-center{font-size:28px;font-weight:800;letter-spacing:.04em}
+.sf-theme-trade-pro .pro-art .pro-art-label{font-size:10px;letter-spacing:.18em;text-transform:uppercase;color:var(--sf-tp-color-text-muted)}