feat: 自适应支线插入引擎（WIP：scoring/branching 抽取、挂点重定向、10 条支线 JSON、决策落库）

src/App.css

@@ -91,6 +91,7 @@
 }
 
 .choice-options {
+  min-width: 0;
   display: flex;
   flex-direction: column;
   gap: 10px;
@@ -98,6 +99,7 @@
 }
 
 .choice-btn {
+  overflow-wrap: anywhere;
   text-align: left;
   padding: 12px 16px;
   border-radius: 8px;
@@ -115,6 +117,36 @@
 }
 
 /* ---- 讲述点 ---- */
+.choice-box fieldset {
+  min-width: 0;
+  border: 0;
+  padding: 12px 0;
+  margin: 0;
+}
+
+.puzzle-option {
+  display: flex;
+  align-items: baseline;
+  gap: 8px;
+  padding: 8px 0;
+  line-height: 1.6;
+}
+
+.choice-box progress {
+  width: 100%;
+  height: 10px;
+  accent-color: #d4a96a;
+}
+
+button:disabled { opacity: 0.6; cursor: default; }
+
+@media (max-width: 600px) {
+  .scene { padding: 64px 12px 16px; }
+  .dimension-row { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
+  .dimension-value { grid-column: 1 / -1; }
+  .dialogue-box > div:last-child { min-width: 0; overflow-wrap: anywhere; }
+}
+
 .mechanism-tag {
   display: inline-block;
   font-size: 12px;