完成视频复刻和优化

core/frontend/src/video-remix-page.css

@@ -148,7 +148,8 @@
 }
 
 .vr-page .remix-information-panel .video-result-placeholder,
-.vr-page .remix-information-panel .video-analysis-result {
+.vr-page .remix-information-panel .video-analysis-result,
+.vr-page .remix-information-panel .remix-generating-state {
   min-height: 286px;
 }
 
@@ -340,11 +341,38 @@
 
 .vr-page .remix-prompt-head {
   display: flex;
-  align-items: flex-start;
-  justify-content: flex-start;
+  align-items: center;
+  justify-content: space-between;
+  gap: 12px;
   margin-bottom: 15px;
 }
 
+.vr-page .remix-prompt-head-actions {
+  display: flex;
+  align-items: center;
+  justify-content: flex-end;
+  gap: 8px;
+  flex: 0 0 auto;
+}
+
+.vr-page .remix-prompt-head-actions .remix-prompt-head-btn {
+  min-width: 0;
+  height: 36px;
+  padding: 0 12px;
+  font-size: 12px;
+  font-weight: 500;
+}
+
+.vr-page .remix-prompt-head-actions .remix-prompt-head-btn svg {
+  width: 14px;
+  height: 14px;
+}
+
+.vr-page .secondary-action:disabled {
+  cursor: not-allowed;
+  opacity: 0.45;
+}
+
 .vr-page .remix-prompt-title {
   display: flex;
   align-items: flex-start;
@@ -560,6 +588,127 @@
   flex-direction: column;
 }
 
+.vr-page .remix-generating-state {
+  display: none;
+  place-items: center;
+  text-align: center;
+}
+
+.vr-page .remix-information-panel.is-analyzing .video-result-placeholder,
+.vr-page .remix-information-panel.is-analyzing .video-analysis-result {
+  display: none;
+}
+
+.vr-page .remix-information-panel.is-analyzing .remix-generating-state {
+  display: grid;
+}
+
+.vr-page .remix-generating-content {
+  width: min(280px, 100%);
+  display: grid;
+  justify-items: center;
+  gap: 10px;
+}
+
+.vr-page .remix-generating-visual {
+  position: relative;
+  width: 136px;
+  height: 104px;
+  margin-bottom: 10px;
+}
+
+.vr-page .remix-generating-frame {
+  position: absolute;
+  inset: 4px 18px 18px 4px;
+  display: grid;
+  place-items: center;
+  overflow: hidden;
+  border: 1px solid rgba(0, 47, 167, 0.14);
+  border-radius: 16px;
+  color: var(--klein);
+  background: rgba(255, 255, 255, 0.94);
+}
+
+.vr-page .remix-generating-frame svg {
+  width: 26px;
+  height: 26px;
+  stroke-width: 1.7;
+}
+
+.vr-page .remix-generating-frame::after {
+  content: "";
+  position: absolute;
+  inset: 0;
+  background: linear-gradient(110deg, transparent 28%, rgba(0, 47, 167, 0.13) 50%, transparent 72%);
+  transform: translateX(-130%);
+  animation: remix-frame-scan 1.35s ease-in-out infinite;
+}
+
+.vr-page .remix-generating-badge {
+  position: absolute;
+  right: 0;
+  bottom: 0;
+  width: 44px;
+  height: 44px;
+  display: grid;
+  place-items: center;
+  border: 3px solid #fff;
+  border-radius: 14px;
+  color: #fff;
+  background: var(--klein);
+  animation: remix-badge-pulse 1.35s ease-in-out infinite;
+}
+
+.vr-page .remix-generating-badge svg {
+  width: 18px;
+  height: 18px;
+}
+
+.vr-page .remix-generating-content > strong {
+  color: var(--text);
+  font-size: 16px;
+  font-weight: 600;
+}
+
+.vr-page .remix-generating-content > span {
+  color: var(--muted);
+  font-size: 12px;
+  line-height: 1.55;
+}
+
+.vr-page .remix-generating-bar {
+  width: 100%;
+  height: 4px;
+  overflow: hidden;
+  margin-top: 6px;
+  border-radius: 999px;
+  background: rgba(0, 47, 167, 0.1);
+}
+
+.vr-page .remix-generating-bar span {
+  display: block;
+  width: 42%;
+  height: 100%;
+  border-radius: inherit;
+  background: var(--klein);
+  animation: remix-progress-slide 1.2s ease-in-out infinite;
+}
+
+@keyframes remix-frame-scan {
+  0% { transform: translateX(-130%); }
+  100% { transform: translateX(130%); }
+}
+
+@keyframes remix-badge-pulse {
+  0%, 100% { transform: scale(1); }
+  50% { transform: scale(1.07); }
+}
+
+@keyframes remix-progress-slide {
+  0% { transform: translateX(-115%); }
+  100% { transform: translateX(260%); }
+}
+
 .vr-page .remix-progress-strip {
   display: grid;
   grid-template-columns: repeat(3, minmax(0, 1fr));
@@ -737,6 +886,11 @@
   background: rgba(0, 47, 167, 0.92);
 }
 
+.vr-page .remix-replace-video.is-disabled {
+  pointer-events: none;
+  opacity: 0.45;
+}
+
 .vr-page .remix-page .video-upload-field.has-preview:hover,
 .vr-page .remix-page .video-upload-field.has-preview:focus-within {
   background: #0f1728;
@@ -753,7 +907,8 @@
 }
 
 .vr-page .remix-page .remix-information-panel .video-result-placeholder,
-.vr-page .remix-page .remix-information-panel .video-analysis-result {
+.vr-page .remix-page .remix-information-panel .video-analysis-result,
+.vr-page .remix-page .remix-information-panel .remix-generating-state {
   flex: 1;
 }
 
@@ -805,6 +960,11 @@
   .vr-page .remix-page .remix-prompt-panel.has-result .remix-prompt-result {
     animation: none;
   }
+  .vr-page .remix-generating-frame::after,
+  .vr-page .remix-generating-badge,
+  .vr-page .remix-generating-bar span {
+    animation: none;
+  }
 }
 
 .vr-page .remix-history-section {
@@ -1100,7 +1260,7 @@
 @media (max-width: 1120px) {
   .vr-page .video-flow-grid,
   .vr-page .remix-flow-grid { grid-template-columns: 1fr; }
-  .vr-page .remix-prompt-head { flex-direction: column; }
+  .vr-page .remix-prompt-head { flex-wrap: wrap; }
   .vr-page .video-flow-actions { flex-wrap: wrap; }
   .vr-page .remix-progress-step:not(:last-child)::after {
     left: calc(50% + 42px);