style: 全站使用背景分层替代装饰边框并统一直角

src/features/production/ProductionPage.vue

@@ -464,7 +464,7 @@ watch(
             </nav>
             <article class="production-detail min-w-0">
                 <NScrollbar class="panel-scroll" content-class="p-5 lg:p-7">
-                    <header class="mb-5 border-b border-line pb-5">
+                    <header class="mb-5 pb-5">
                         <div class="flex flex-wrap items-start justify-between gap-3">
                             <div>
                                 <p class="eyebrow">BEAT {{ shot.beatNo }} / SHOT {{ shot.shotNo }}</p>

src/features/production/components/ShotProductionAssets.vue

@@ -401,7 +401,7 @@ async function inspectSpecs() {
             </div>
         </div>
 
-        <NCollapse v-if="keyframeSpec || videoSpec" class="mt-5 border-t border-line pt-4 text-xs"
+        <NCollapse v-if="keyframeSpec || videoSpec" class="mt-5 pt-4 text-xs"
             ><NCollapseItem name="details"
                 ><template #header>本镜确定性生成规格</template>
                 <div class="mt-4 grid gap-5 lg:grid-cols-2">