更新：重构多个页面代码，简化代码。实现无刷新更新数据。

css/style.css

@@ -41,4 +41,89 @@ A:hover {
     FONT-SIZE: 16px;
     COLOR: #043B9C;
     TEXT-DECORATION: underline
-}
+}
+
+.btn-submit {
+    background-color: var(--primary-color);
+    color: #0c0c0c;
+    border: none;
+    padding: 2px 2px;
+    border-radius: 4px;
+    cursor: pointer;
+    font-size: 16px;
+    font-weight: 600;
+    transition: background-color 0.3s;
+    display: flex;
+    align-items: center;
+    gap: 8px;
+    margin-top: 15px;  /* ADDED 上边距 */
+    display: inline-flex;  /* MODIFIED from flex */
+}
+
+.btn-submit:hover {
+    background-color: #2980b9;
+}
+
+.btn-submit:disabled {
+    background-color: #95a5a6;
+    cursor: not-allowed;
+}
+
+#chartCanvas {
+    width: 100%;
+    height: 10px;
+}
+
+.loading-overlay {
+    position: absolute;
+    top: 0;
+    left: 0;
+    width: 100%;
+    height: 100%;
+    background-color: rgba(255, 255, 255, 0.85);
+    display: flex;
+    justify-content: center;
+    align-items: center;
+    flex-direction: column;
+    z-index: 10;
+    opacity: 0;
+    transition: opacity 0.3s;
+    pointer-events: none;
+}
+
+.loading-overlay.active {
+    opacity: 1;
+    pointer-events: auto;
+}
+
+/* 加载文字样式  */
+.loading-overlay p {
+    font-size: 18px;
+    color: var(--secondary-color);
+    margin-top: 10px;
+}
+
+.spinner {
+    width: 50px;
+    height: 50px;
+    border: 5px solid rgba(52, 152, 219, 0.2);
+    border-top: 5px solid var(--primary-color);
+    border-radius: 50%;
+    animation: spin 1s linear infinite;
+    margin-bottom: 15px;
+}
+
+@keyframes spin {
+    0% { transform: rotate(0deg); }
+    100% { transform: rotate(360deg); }
+}
+
+
+.chart-container {
+    width: 1000px;
+    height: 400px;
+    margin-top: 20px;
+}
+.chart-container:last-child {
+    margin-bottom: 20px;
+}