显示控件范围

public/css/style.css

@@ -728,6 +728,11 @@ header p {
     line-height: 1;
 }
 
+.square-btn {
+    letter-spacing: -0.1em;
+    font-size: 0.82rem;
+}
+
 .control-btn:hover {
     transform: translateY(-1px);
     background: rgba(51, 65, 85, 0.95);
@@ -740,6 +745,37 @@ header p {
     transform: none;
 }
 
+.control-popover {
+    position: relative;
+    display: inline-flex;
+    align-items: center;
+}
+
+.popover-panel {
+    position: absolute;
+    left: 50%;
+    bottom: calc(100% + 0.55rem);
+    transform: translateX(-50%) translateY(6px);
+    opacity: 0;
+    pointer-events: none;
+    transition: opacity 0.18s ease, transform 0.18s ease;
+    padding: 0.55rem 0.6rem;
+    border-radius: 12px;
+    border: 1px solid rgba(148, 163, 184, 0.18);
+    background: rgba(15, 23, 42, 0.96);
+    box-shadow: 0 12px 24px rgba(2, 6, 23, 0.34);
+    backdrop-filter: blur(12px);
+    z-index: 20;
+    white-space: nowrap;
+}
+
+.control-popover:hover .popover-panel,
+.control-popover:focus-within .popover-panel {
+    opacity: 1;
+    pointer-events: auto;
+    transform: translateX(-50%) translateY(0);
+}
+
 .volume-control {
     display: flex;
     align-items: center;
@@ -760,23 +796,11 @@ header p {
     font-variant-numeric: tabular-nums;
 }
 
-.progress-chip {
-    display: inline-flex;
-    align-items: center;
-    padding: 0.34rem 0.55rem;
-    border-radius: 999px;
-    background: rgba(15, 23, 42, 0.7);
-    border: 1px solid rgba(148, 163, 184, 0.16);
-    color: rgba(226, 232, 240, 0.92);
-    font-size: 0.76rem;
-    font-weight: 600;
-    white-space: nowrap;
-}
-
 .speed-control {
-    display: inline-flex;
-    align-items: center;
-    gap: 0.4rem;
+    display: flex;
+    flex-direction: column;
+    align-items: flex-start;
+    gap: 0.45rem;
     color: rgba(226, 232, 240, 0.88);
     font-size: 0.8rem;
     font-weight: 600;
@@ -803,11 +827,21 @@ header p {
     cursor: pointer;
 }
 
-.seek-bar-progress {
+.seek-bar-transcode {
+    position: absolute;
+    inset: 0 auto 0 0;
     width: 0%;
     height: 100%;
     border-radius: 999px;
-    background: linear-gradient(90deg, #38bdf8, #2563eb);
+    background: linear-gradient(90deg, rgba(59, 130, 246, 0.45), rgba(37, 99, 235, 0.82));
+}
+
+.seek-bar-progress {
+    position: relative;
+    width: 0%;
+    height: 100%;
+    border-radius: 999px;
+    background: linear-gradient(90deg, #f8fafc, #dbeafe);
 }
 
 .seek-bar-handle {