diff --git a/web/static/css/style.css b/web/static/css/style.css
index 96419805..db5ccb51 100644
--- a/web/static/css/style.css
+++ b/web/static/css/style.css
@@ -22,6 +22,11 @@
     --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
     --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
     --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
+    /* 对话页专用 */
+    --chat-bg: linear-gradient(180deg, #f0f4f8 0%, #e8eef4 50%, #f2f6fa 100%);
+    --chat-bubble-user: linear-gradient(135deg, #2563eb 0%, #0066ff 50%, #0052cc 100%);
+    --chat-bubble-assistant: #ffffff;
+    --chat-sidebar-bg: linear-gradient(180deg, #fcfdfe 0%, #f6f8fb 100%);
 }
 
 body {
@@ -450,13 +455,23 @@ body {
 
 .conversation-sidebar {
     width: 280px;
-    background: linear-gradient(180deg, #ffffff 0%, #fafbfc 100%);
+    background: var(--chat-sidebar-bg);
     border-right: 1px solid var(--border-color);
     display: flex;
     flex-direction: column;
     flex-shrink: 0;
     height: 100%;
     overflow: hidden;
+    box-shadow: 4px 0 24px rgba(0, 0, 0, 0.03);
+}
+
+.conversation-sidebar .sidebar-content::-webkit-scrollbar {
+    width: 6px;
+}
+
+.conversation-sidebar .sidebar-content::-webkit-scrollbar-thumb {
+    background: rgba(0, 0, 0, 0.12);
+    border-radius: 3px;
 }
 
 header {
@@ -753,25 +768,26 @@ header {
 
 .new-chat-btn {
     width: 100%;
-    padding: 10px 16px;
-    background: var(--accent-color);
+    padding: 11px 16px;
+    background: linear-gradient(135deg, var(--accent-color) 0%, #0052cc 100%);
     color: white;
     border: none;
-    border-radius: 8px;
+    border-radius: 10px;
     font-size: 0.9375rem;
     font-weight: 500;
     cursor: pointer;
-    transition: all 0.2s;
+    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
     display: flex;
     align-items: center;
     justify-content: center;
     gap: 8px;
+    box-shadow: 0 2px 8px rgba(0, 102, 255, 0.25);
 }
 
 .new-chat-btn:hover {
-    background: var(--accent-hover);
-    transform: translateY(-1px);
-    box-shadow: var(--shadow-sm);
+    background: linear-gradient(135deg, #0052cc 0%, var(--accent-color) 100%);
+    transform: translateY(-2px);
+    box-shadow: 0 4px 14px rgba(0, 102, 255, 0.35);
 }
 
 .new-chat-btn span {
@@ -806,7 +822,7 @@ header {
     width: 100%;
     padding: 8px 32px 8px 12px;
     border: 1px solid var(--border-color);
-    border-radius: 6px;
+    border-radius: 10px;
     font-size: 0.875rem;
     background: var(--bg-primary);
     color: var(--text-primary);
@@ -1002,9 +1018,19 @@ header {
     flex-direction: column;
     flex: 1;
     min-width: 0;
-    background: #f5f7fa;
+    background: var(--chat-bg);
     overflow: hidden;
     height: 100%;
+    position: relative;
+}
+
+.chat-container::before {
+    content: '';
+    position: absolute;
+    inset: 0;
+    background-image: radial-gradient(circle at 20% 30%, rgba(0, 102, 255, 0.03) 0%, transparent 50%),
+                      radial-gradient(circle at 80% 70%, rgba(0, 102, 255, 0.02) 0%, transparent 40%);
+    pointer-events: none;
 }
 
 /* 会话顶部栏样式 */
@@ -1026,26 +1052,46 @@ header {
     flex: 1;
     overflow-y: auto;
     overflow-x: hidden;
-    padding: 24px;
-    background: #f5f7fa;
+    padding: 28px 24px 32px;
+    background: transparent;
     display: flex;
     flex-direction: column;
     min-height: 0;
+    position: relative;
+    z-index: 1;
+}
+
+.chat-messages::-webkit-scrollbar {
+    width: 8px;
+}
+
+.chat-messages::-webkit-scrollbar-track {
+    background: transparent;
+    border-radius: 4px;
+}
+
+.chat-messages::-webkit-scrollbar-thumb {
+    background: rgba(0, 0, 0, 0.12);
+    border-radius: 4px;
+}
+
+.chat-messages::-webkit-scrollbar-thumb:hover {
+    background: rgba(0, 0, 0, 0.2);
 }
 
 .message {
-    margin-bottom: 24px;
+    margin-bottom: 26px;
     display: flex;
     align-items: flex-start;
-    gap: 12px;
-    animation: fadeIn 0.3s ease-in;
+    gap: 14px;
+    animation: messageFadeIn 0.35s cubic-bezier(0.4, 0, 0.2, 1);
     width: 100%;
 }
 
-@keyframes fadeIn {
+@keyframes messageFadeIn {
     from {
         opacity: 0;
-        transform: translateY(10px);
+        transform: translateY(12px);
     }
     to {
         opacity: 1;
@@ -1064,24 +1110,31 @@ header {
 }
 
 .message-avatar {
-    width: 32px;
-    height: 32px;
-    border-radius: 6px;
+    width: 36px;
+    height: 36px;
+    border-radius: 10px;
     display: flex;
     align-items: center;
     justify-content: center;
-    font-size: 0.75rem;
+    font-size: 0.8125rem;
     font-weight: 600;
     flex-shrink: 0;
+    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
+    transition: transform 0.2s ease, box-shadow 0.2s ease;
+}
+
+.message:hover .message-avatar {
+    box-shadow: 0 3px 12px rgba(0, 0, 0, 0.08);
 }
 
 .message.user .message-avatar {
-    background: var(--accent-color);
+    background: var(--chat-bubble-user);
     color: white;
+    border: none;
 }
 
 .message.assistant .message-avatar {
-    background: var(--bg-tertiary);
+    background: var(--chat-bubble-assistant);
     color: var(--text-secondary);
     border: 1px solid var(--border-color);
 }
@@ -1119,17 +1172,22 @@ header {
 }
 
 .message-bubble {
-    padding: 12px 16px;
-    border-radius: 8px;
+    padding: 14px 18px;
+    border-radius: 14px;
     word-wrap: break-word;
     word-break: break-word;
-    line-height: 1.6;
-    box-shadow: var(--shadow-sm);
+    line-height: 1.62;
+    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06), 0 1px 3px rgba(0, 0, 0, 0.04);
     overflow-x: auto;
     overflow-y: visible;
     max-width: 100%;
     -webkit-overflow-scrolling: touch;
     position: relative;
+    transition: box-shadow 0.2s ease;
+}
+
+.message-bubble:hover {
+    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08), 0 2px 6px rgba(0, 0, 0, 0.05);
 }
 
 /* Markdown 样式 */
@@ -1450,18 +1508,24 @@ header {
 }
 
 .message.user .message-bubble {
-    background: var(--accent-color);
+    background: var(--chat-bubble-user);
     color: white;
-    border-bottom-right-radius: 8px;
-    border-top-right-radius: 2px;
+    border: none;
+    border-top-right-radius: 6px;
+    border-bottom-right-radius: 14px;
+    box-shadow: 0 2px 12px rgba(0, 102, 255, 0.25), 0 1px 3px rgba(0, 0, 0, 0.08);
+}
+
+.message.user .message-bubble:hover {
+    box-shadow: 0 4px 18px rgba(0, 102, 255, 0.3), 0 2px 6px rgba(0, 0, 0, 0.1);
 }
 
 .message.assistant .message-bubble {
-    background: var(--bg-primary);
+    background: var(--chat-bubble-assistant);
     color: var(--text-primary);
-    border: 1px solid var(--border-color);
-    border-bottom-left-radius: 8px;
-    border-top-left-radius: 2px;
+    border: 1px solid rgba(0, 0, 0, 0.06);
+    border-top-left-radius: 6px;
+    border-bottom-left-radius: 14px;
 }
 
 .message.assistant .message-bubble pre {
@@ -1472,70 +1536,80 @@ header {
 }
 
 .message.system .message-bubble {
-    background: var(--bg-tertiary);
+    background: rgba(255, 255, 255, 0.85);
     color: var(--text-secondary);
     border: 1px solid var(--border-color);
-    text-align: left;
+    text-align: center;
     font-size: 0.875rem;
-    padding: 10px 16px;
+    padding: 12px 20px;
     width: 100%;
+    border-radius: 12px;
+    backdrop-filter: blur(6px);
 }
 
 .message-time {
     font-size: 0.6875rem;
     color: var(--text-muted);
-    margin-top: 4px;
+    margin-top: 6px;
     padding: 0 2px;
     font-weight: 400;
+    letter-spacing: 0.02em;
 }
 
 /* MCP调用区域 */
 .mcp-call-section {
-    margin-top: 12px;
-    padding-top: 12px;
-    border-top: 1px solid var(--border-color);
+    margin-top: 14px;
+    padding-top: 14px;
+    border-top: 1px solid rgba(0, 0, 0, 0.06);
     width: 100%;
 }
 
 .mcp-call-label {
     font-size: 0.75rem;
     color: var(--text-secondary);
-    margin-bottom: 8px;
+    margin-bottom: 10px;
     display: flex;
     align-items: center;
-    gap: 6px;
-    font-weight: 500;
+    gap: 8px;
+    font-weight: 600;
+    letter-spacing: 0.02em;
 }
 
 .mcp-call-label::before {
     content: '';
-    width: 4px;
-    height: 4px;
+    width: 5px;
+    height: 5px;
     background: var(--accent-color);
     border-radius: 50%;
     display: inline-block;
     flex-shrink: 0;
+    box-shadow: 0 0 0 2px rgba(0, 102, 255, 0.2);
 }
 
 .mcp-call-buttons {
     display: flex;
     flex-wrap: wrap;
-    gap: 6px;
+    gap: 8px;
 }
 
 .process-detail-btn {
-    background: rgba(156, 39, 176, 0.1) !important;
-    border-color: rgba(156, 39, 176, 0.3) !important;
-    color: #9c27b0 !important;
+    background: rgba(156, 39, 176, 0.12) !important;
+    border-color: rgba(156, 39, 176, 0.35) !important;
+    color: #7b1fa2 !important;
     display: inline-flex;
     align-items: center;
     gap: 6px;
+    border-radius: 10px !important;
+    padding: 8px 14px !important;
+    font-weight: 500 !important;
+    transition: all 0.2s ease !important;
 }
 
 .process-detail-btn:hover {
-    background: rgba(156, 39, 176, 0.2) !important;
+    background: rgba(156, 39, 176, 0.22) !important;
     border-color: #9c27b0 !important;
-    color: #7b1fa2 !important;
+    color: #6a1b9a !important;
+    box-shadow: 0 2px 10px rgba(156, 39, 176, 0.25) !important;
 }
 
 .process-detail-btn span {
@@ -1572,14 +1646,18 @@ header {
 .chat-input-container {
     display: flex;
     flex-direction: row;
-    gap: 8px;
+    gap: 10px;
     align-items: flex-end;
-    padding: 12px 16px;
-    background: var(--bg-primary);
+    padding: 16px 20px 20px;
+    background: rgba(255, 255, 255, 0.92);
     border-top: 1px solid rgba(0, 0, 0, 0.06);
     flex-shrink: 0;
     width: 100%;
     box-sizing: border-box;
+    backdrop-filter: blur(10px);
+    position: relative;
+    z-index: 2;
+    box-shadow: 0 -4px 24px rgba(0, 0, 0, 0.04);
 }
 
 .chat-input-container > .chat-input-field {
@@ -1601,26 +1679,26 @@ header {
 .chat-input-container textarea {
     flex: 1;
     min-width: 0;
-    padding: 10px 14px;
-    border: 1px solid rgba(0, 0, 0, 0.1);
-    border-radius: 12px;
+    padding: 12px 16px;
+    border: 1px solid rgba(0, 0, 0, 0.08);
+    border-radius: 14px;
     font-size: 0.9375rem;
     outline: none;
-    transition: all 0.2s;
+    transition: border-color 0.2s ease, box-shadow 0.2s ease;
     background: #ffffff;
     color: var(--text-primary);
     resize: none;
-    height: 40px;
-    min-height: 40px;
-    max-height: 120px;
+    height: 44px;
+    min-height: 44px;
+    max-height: 140px;
     font-family: inherit;
-    line-height: 1.4;
+    line-height: 1.45;
     overflow-y: auto;
     box-sizing: border-box;
     vertical-align: middle;
-    /* 隐藏滚动条但保留滚动功能 */
-    scrollbar-width: thin; /* Firefox */
-    scrollbar-color: transparent transparent; /* Firefox - 隐藏滚动条 */
+    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
+    scrollbar-width: thin;
+    scrollbar-color: transparent transparent;
 }
 
 /* WebKit 浏览器（Chrome, Safari, Edge）的滚动条样式 - 隐藏但保留功能 */
@@ -1648,7 +1726,7 @@ header {
 
 .chat-input-container textarea:focus {
     border-color: var(--accent-color);
-    box-shadow: 0 0 0 2px rgba(0, 102, 255, 0.08);
+    box-shadow: 0 0 0 3px rgba(0, 102, 255, 0.12);
     background: #ffffff;
 }
 
@@ -1661,22 +1739,22 @@ header {
     align-items: center;
     justify-content: center;
     gap: 6px;
-    padding: 10px 20px;
-    height: 40px;
+    padding: 10px 22px;
+    height: 44px;
     background: linear-gradient(135deg, var(--accent-color) 0%, #0052cc 100%);
     color: white;
     border: none;
-    border-radius: 12px;
+    border-radius: 14px;
     cursor: pointer;
     font-size: 0.9375rem;
     font-weight: 600;
-    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
+    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
     white-space: nowrap;
     flex-shrink: 0;
     box-sizing: border-box;
     position: relative;
     overflow: hidden;
-    box-shadow: 0 2px 8px rgba(0, 102, 255, 0.2), 0 1px 3px rgba(0, 0, 0, 0.1);
+    box-shadow: 0 3px 12px rgba(0, 102, 255, 0.28), 0 1px 4px rgba(0, 0, 0, 0.08);
 }
 
 /* 按钮光效动画 */
@@ -1904,11 +1982,11 @@ header {
     display: inline-flex;
     align-items: center;
     gap: 6px;
-    padding: 6px 12px;
-    background: var(--bg-primary);
+    padding: 8px 14px;
+    background: rgba(0, 102, 255, 0.08);
     color: var(--accent-color);
-    border: 1px solid var(--border-color);
-    border-radius: 6px;
+    border: 1px solid rgba(0, 102, 255, 0.2);
+    border-radius: 10px;
     font-size: 0.8125rem;
     font-weight: 500;
     cursor: pointer;
@@ -1920,7 +1998,7 @@ header {
     color: white;
     border-color: var(--accent-color);
     transform: translateY(-1px);
-    box-shadow: var(--shadow-sm);
+    box-shadow: 0 3px 10px rgba(0, 102, 255, 0.3);
 }
 
 .mcp-detail-btn:active {
@@ -2516,7 +2594,7 @@ header {
     align-items: center;
     margin-bottom: 12px;
     padding-bottom: 12px;
-    border-bottom: 1px solid var(--border-color);
+    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
 }
 
 .progress-actions {
@@ -2553,19 +2631,21 @@ header {
 }
 
 .progress-toggle {
-    padding: 4px 12px;
+    padding: 6px 14px;
     background: var(--bg-tertiary);
     border: 1px solid var(--border-color);
-    border-radius: 4px;
+    border-radius: 8px;
     font-size: 0.8125rem;
+    font-weight: 500;
     color: var(--text-secondary);
     cursor: pointer;
-    transition: all 0.2s;
+    transition: all 0.2s ease;
 }
 
 .progress-toggle:hover {
     background: var(--bg-secondary);
     color: var(--text-primary);
+    border-color: rgba(0, 0, 0, 0.12);
 }
 
 .progress-timeline {
@@ -2580,13 +2660,13 @@ header {
 }
 
 .timeline-item {
-    padding: 12px;
-    margin-bottom: 8px;
-    border-left: 3px solid var(--border-color);
+    padding: 12px 14px;
+    margin-bottom: 10px;
+    border-left: 4px solid var(--border-color);
     padding-left: 16px;
     background: var(--bg-secondary);
-    border-radius: 4px;
-    transition: all 0.2s;
+    border-radius: 8px;
+    transition: all 0.2s ease;
 }
 
 .timeline-item:hover {
@@ -9317,15 +9397,16 @@ header {
     display: flex;
     align-items: center;
     gap: 6px;
-    padding: 10px 12px;
-    height: 40px;
+    padding: 10px 14px;
+    height: 44px;
     background: #ffffff;
-    border: 1px solid rgba(0, 0, 0, 0.1);
-    border-radius: 12px;
+    border: 1px solid rgba(0, 0, 0, 0.08);
+    border-radius: 14px;
     color: var(--text-primary);
     cursor: pointer;
-    transition: all 0.2s;
+    transition: all 0.2s ease;
     flex-shrink: 0;
+    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
     font-size: 0.9375rem;
     font-weight: 500;
     white-space: nowrap;