样式修改

frontend-web/src/styles/globals.css

@@ -752,3 +752,62 @@
   --container-width-md: calc(var(--spacing) * 204);
   --container-width-lg: calc(var(--spacing) * 256);
 }
+
+/* ── Landing 态输入框 Gemini 风格：旋转彩色描边 + 多色柔光阴影 ───────── */
+/* 关键：::before 转动的彩色锥形渐变 + ::after 内嵌白板遮罩中央，只在 1.5px 边缘可见模糊彩光 */
+.gemini-shadow {
+  box-shadow:
+    0 0 20px rgba(66, 133, 244, 0.10),
+    0 0 40px rgba(219, 68, 55, 0.05),
+    0 0 60px rgba(244, 180, 0, 0.05),
+    0 0 80px rgba(15, 157, 88, 0.05);
+}
+.dark .gemini-shadow {
+  box-shadow:
+    0 0 24px rgba(66, 133, 244, 0.20),
+    0 0 48px rgba(219, 68, 55, 0.10),
+    0 0 72px rgba(244, 180, 0, 0.10),
+    0 0 96px rgba(15, 157, 88, 0.10);
+}
+
+.gemini-gradient-border {
+  position: relative;
+  background: var(--background);
+  border-radius: 1.5rem;
+  z-index: 0;
+  overflow: hidden;
+}
+.gemini-gradient-border::before {
+  content: '';
+  position: absolute;
+  width: 200%;
+  height: 200%;
+  top: -50%;
+  left: -50%;
+  background: conic-gradient(
+    from 0deg,
+    #4285F4 0deg,
+    #DB4437 90deg,
+    #F4B400 180deg,
+    #0F9D58 270deg,
+    #4285F4 360deg
+  );
+  z-index: -2;
+  animation: gemini-rotate 4s linear infinite;
+  filter: blur(10px);
+  pointer-events: none;
+}
+.gemini-gradient-border::after {
+  content: '';
+  position: absolute;
+  inset: 2.5px;
+  background: var(--background);
+  border-radius: calc(1.5rem - 2px);
+  z-index: -1;
+}
+
+@keyframes gemini-rotate {
+  to {
+    transform: rotate(360deg);
+  }
+}