feat: polish spectra lab editorial details

index.html

@@ -61,6 +61,20 @@
               </p>
             </aside>
           </div>
+          <div class="hero-ledger">
+            <article class="ledger-item">
+              <span>Design principle</span>
+              <strong>Less gesture, more judgment.</strong>
+            </article>
+            <article class="ledger-item">
+              <span>Material cue</span>
+              <strong>纸感、墨感、少量暗红，而不是数字炫光。</strong>
+            </article>
+            <article class="ledger-item">
+              <span>Reading rhythm</span>
+              <strong>先标题，再说明，再留下停顿。</strong>
+            </article>
+          </div>
         </section>
 
         <section id="statement" class="statement section reveal">
@@ -187,6 +201,10 @@
             <p>
               如果第一页就把所有招式用完，观者只会记得“效果很多”。但如果页面知道何时收、何时留白、何时只用一条线和一块色面说话，它才更像真正完成度高的作品。
             </p>
+            <div class="closing-signoff">
+              <span>Spectra Lab / Editorial pass</span>
+              <span>Built for calm impact.</span>
+            </div>
           </div>
         </section>
       </main>