diff --git a/frontend/app/app.css b/frontend/app/app.css
index 2ab428c..4632c29 100644
--- a/frontend/app/app.css
+++ b/frontend/app/app.css
@@ -1,5 +1,4 @@
-@import "tailwindcss/theme.css";
-@import "tailwindcss/utilities.css";
+@import "tailwindcss";
 
 @theme {
   --font-sans: Inter, "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
@@ -60,8 +59,9 @@
   html,
   body {
     margin: 0;
-    min-width: 1024px;
-    min-height: 100%;
+    min-width: 1120px;
+    min-height: 100vh;
+    overflow: hidden;
   }
 
   *,
@@ -69,6 +69,16 @@
   *::after {
     box-sizing: border-box;
   }
+
+  button,
+  input,
+  select {
+    font: inherit;
+  }
+
+  button {
+    color: inherit;
+  }
 }
 
 @layer utilities {
@@ -88,4 +98,238 @@
   .scrollbar-thin::-webkit-scrollbar-thumb:hover {
     background: #c4d0dc;
   }
+
+  /* 侧边栏双层渐变背景 — Tailwind 任意值无法可靠表达逗号分隔的多层 background */
+  .sidebar-shell {
+    background:
+      radial-gradient(circle at 10% 1%, rgb(28 105 186 / 25%), transparent 27%),
+      #09233f;
+  }
+
+  .welcome-panel-shell {
+    background:
+      radial-gradient(circle at 50% 39%, rgb(74 150 225 / 9%), transparent 24%),
+      radial-gradient(circle, #d3dee8 1px, transparent 1px);
+    background-size: auto, 18px 18px;
+  }
+
+  .dashboard-hero-shell {
+    background: linear-gradient(125deg, #0b3d69, #1978d4);
+  }
+
+  .trend-chart-bg {
+    background: repeating-linear-gradient(to bottom, #fff 0, #fff 44px, #eef3f7 45px);
+  }
+
+  .dashboard-donut {
+    background: conic-gradient(#318de0 0 67%, #72c9b0 67% 86%, #f3b75c 86% 100%);
+  }
+
+  .dashboard-donut::after {
+    position: absolute;
+    width: 78px;
+    height: 78px;
+    border-radius: 50%;
+    background: #fff;
+    content: "";
+  }
+
+  .tree-skeleton-bar {
+    background: linear-gradient(90deg, #f2f5f8, #fafbfc, #f2f5f8);
+    background-size: 200% 100%;
+    animation: shimmer 1.3s infinite;
+  }
+
+  .tabbar-scroll::-webkit-scrollbar {
+    height: 6px;
+  }
+
+  .tabbar-scroll::-webkit-scrollbar-track {
+    background: #f1f3f5;
+  }
+
+  .tabbar-scroll::-webkit-scrollbar-thumb {
+    background: #c9d6e4;
+    border-radius: 3px;
+  }
+
+  .tabbar-scroll::-webkit-scrollbar-thumb:hover {
+    background: #a8b9ca;
+  }
+
+  .stage-dot-editing {
+    box-shadow: 0 0 0 3px rgb(36 149 211 / 13%);
+    animation: lock-pulse 1.8s ease-in-out infinite;
+  }
+
+  .editor-canvas-shell {
+    background:
+      linear-gradient(rgb(255 255 255 / 82%), rgb(255 255 255 / 82%)),
+      radial-gradient(circle, #c9d8e7 1px, transparent 1px);
+    background-color: #f4f7fa;
+    background-size: auto, 18px 18px;
+  }
+
+  .modal-panel {
+    animation: modal-in 0.18s ease-out;
+  }
+
+  .toast-enter {
+    animation: toast-in 0.2s ease-out;
+  }
+
+  .notebook-md h1,
+  .notebook-md h2,
+  .notebook-md h3,
+  .notebook-md p,
+  .notebook-md li {
+    margin: 6px 0;
+    color: #24292f;
+    font-size: 14px;
+    line-height: 1.6;
+  }
+
+  .notebook-md h1 {
+    font-size: 24px;
+    color: #1f6feb;
+    font-weight: 600;
+  }
+
+  .notebook-md h2 {
+    font-size: 20px;
+    color: #1f6feb;
+    font-weight: 600;
+  }
+
+  .notebook-md h3 {
+    font-size: 16px;
+    color: #24292f;
+    font-weight: 600;
+  }
+
+  .notebook-md ul,
+  .notebook-md ol {
+    padding-left: 24px;
+  }
+
+  .notebook-md li {
+    margin-left: 0;
+    list-style-position: outside;
+  }
+}
+
+@keyframes shimmer {
+  to {
+    background-position: -200% 0;
+  }
+}
+
+@keyframes lock-pulse {
+  50% {
+    opacity: 0.5;
+    transform: scale(0.78);
+  }
+}
+
+@keyframes modal-in {
+  from {
+    opacity: 0;
+    transform: translateY(8px) scale(0.985);
+  }
+}
+
+@keyframes toast-in {
+  from {
+    opacity: 0;
+    transform: translateY(-7px);
+  }
+}
+
+@keyframes spin {
+  to {
+    transform: rotate(360deg);
+  }
+}
+
+/* Shared UI classes still used by admin / schedules pages */
+.icon-button {
+  display: grid;
+  width: 34px;
+  height: 34px;
+  place-items: center;
+  border: 1px solid #dfe6ed;
+  border-radius: 7px;
+  background: #fff;
+  cursor: pointer;
+}
+
+.icon-button:hover {
+  border-color: #b9c9da;
+  background: #f7faff;
+}
+
+.avatar {
+  display: grid;
+  width: 34px;
+  height: 34px;
+  place-items: center;
+  border-radius: 50%;
+  color: #fff;
+  background: linear-gradient(145deg, #3b92ed, #1869c9);
+  font-size: 14px;
+  font-weight: 700;
+}
+
+.primary-button,
+.secondary-button {
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  gap: 7px;
+  border-radius: 6px;
+  cursor: pointer;
+  font-weight: 650;
+}
+
+.primary-button {
+  min-height: 37px;
+  padding: 0 15px;
+  border: 1px solid #126ac3;
+  color: #fff;
+  background: linear-gradient(135deg, #1881e7, #1268c9);
+  box-shadow: 0 6px 15px rgb(20 111 202 / 18%);
+  font-size: 12px;
+}
+
+.primary-button:hover:not(:disabled) {
+  background: linear-gradient(135deg, #1175d8, #0e5bad);
+}
+
+.primary-button:disabled {
+  cursor: not-allowed;
+  opacity: 0.58;
+}
+
+.secondary-button {
+  min-height: 37px;
+  padding: 0 15px;
+  border: 1px solid #d8e1e9;
+  color: #56687c;
+  background: #fff;
+  font-size: 12px;
+}
+
+.button-spinner {
+  width: 13px;
+  height: 13px;
+  border: 2px solid rgb(255 255 255 / 45%);
+  border-top-color: #fff;
+  border-radius: 50%;
+  animation: spin 0.7s linear infinite;
+}
+
+.button-spinner.button-spinner--blue,
+.button-spinner--blue {
+  border-color: rgb(34 121 199 / 22%);
+  border-top-color: #2279c7;
 }
\ No newline at end of file
diff --git a/frontend/app/components/common/Sidebar.tsx b/frontend/app/components/common/Sidebar.tsx
index 98a5189..65c8801 100644
--- a/frontend/app/components/common/Sidebar.tsx
+++ b/frontend/app/components/common/Sidebar.tsx
@@ -40,46 +40,77 @@ export function Sidebar({
     onNavigate(page);
   };
 
-  // 根据管理员权限构建菜单项
   const navigation: NavigationItem[] = [
     { label: "工作台", icon: "home", page: "home" },
     { label: "构建脚本", icon: "script", page: "scripts" },
     { label: "调度配置", icon: "schedule", page: "schedules" },
   ];
 
-  // 系统管理员才显示"系统管理"菜单
   if (isSystemAdmin) {
     navigation.push({ label: "系统管理", icon: "settings", page: "system" });
   }
 
   return (
-    <aside className={`sidebar${collapsed ? " is-collapsed" : ""}`}>
-      <div className="brand">
-        <span className="brand__mark"><Icon name="brand" size={31} /></span>
-        {!collapsed && <span className="brand__name">模型实验开发平台</span>}
+    <aside
+      className={`sidebar-shell relative z-[3] flex min-h-screen flex-col text-[#c9d7e7] shadow-[5px_0_18px_rgb(19_47_77_/_9%)] transition-[width,min-width] duration-200 ease-in-out ${
+        collapsed
+          ? "w-[70px] min-w-[70px]"
+          : "w-[210px] min-w-[210px] max-xl:w-[184px] max-xl:min-w-[184px]"
+      }`}
+    >
+      <div
+        className={`flex h-[70px] items-center gap-2.5 border-b border-white/8 text-white ${
+          collapsed ? "justify-center px-0" : "px-[17px]"
+        }`}
+      >
+        <span className="grid size-9 shrink-0 place-items-center text-[#5ca9ff]">
+          <Icon name="brand" size={31} />
+        </span>
+        {!collapsed && (
+          <span className="whitespace-nowrap text-[15px] font-bold tracking-[0.01em] max-xl:text-[13px]">
+            模型实验开发平台
+          </span>
+        )}
       </div>
 
       {!collapsed && (
-        <nav className="navigation" aria-label="主导航">
-          {navigation.map((item) => (
-            <button
-              className={`nav-item${
-                item.page === activePage ? " nav-item--active" : ""
-              }`}
-              key={item.label}
-              type="button"
-              onClick={() => handleNavigationClick(item.page)}
-            >
-              <Icon name={item.icon} size={19} />
-              <span>{item.label}</span>
-            </button>
-          ))}
+        <nav
+          className="flex flex-col gap-[7px] px-[9px] py-[19px]"
+          aria-label="主导航"
+        >
+          {navigation.map((item) => {
+            const isActive = item.page === activePage;
+            return (
+              <button
+                className={`flex h-12 w-full items-center gap-[13px] rounded-md border-0 px-[17px] text-left text-sm transition-[color,background] duration-[180ms] ease-in-out ${
+                  isActive
+                    ? "bg-gradient-to-br from-[#1479e8] to-[#1267ca] text-white shadow-[0_7px_18px_rgb(7_96_193_/_26%)]"
+                    : "bg-transparent text-[#b9cade] hover:bg-white/6 hover:text-white"
+                }`}
+                key={item.label}
+                type="button"
+                onClick={() => handleNavigationClick(item.page)}
+              >
+                <Icon name={item.icon} size={19} />
+                <span>{item.label}</span>
+              </button>
+            );
+          })}
         </nav>
       )}
 
-      <button className="sidebar-footer" type="button" onClick={onToggleCollapse}>
+      <button
+        className={`mt-auto mb-[17px] flex h-12 cursor-pointer items-center gap-[13px] rounded-md border-0 bg-transparent text-sm text-[#b9cade] transition-[color,background] duration-[180ms] ease-in-out hover:bg-white/6 hover:text-white ${
+          collapsed
+            ? "mx-auto w-[calc(100%-18px)] justify-center px-[17px]"
+            : "mx-[9px] w-[calc(100%-18px)] px-[17px]"
+        }`}
+        type="button"
+        onClick={onToggleCollapse}
+        aria-label={collapsed ? "展开菜单" : "收起菜单"}
+      >
         <Icon name="menu" size={19} />
-        <span>{collapsed ? "展开菜单" : "收起菜单"}</span>
+        {!collapsed && <span>收起菜单</span>}
       </button>
     </aside>
   );
diff --git a/frontend/app/components/common/Toast.tsx b/frontend/app/components/common/Toast.tsx
index fa9e26b..f200567 100644
--- a/frontend/app/components/common/Toast.tsx
+++ b/frontend/app/components/common/Toast.tsx
@@ -9,12 +9,23 @@ type ToastProps = {
   toast: ToastState | null;
 };
 
+const toneIconClass: Record<ToastState["tone"], string> = {
+  success: "bg-[#e6f7f0] text-[#177b55]",
+  error: "bg-[#fff0f0] text-[#b94a4a]",
+  info: "bg-[#eaf4fd] text-[#2675bf]",
+};
+
 export function Toast({ toast }: ToastProps) {
   if (!toast) return null;
 
   return (
-    <div className={`toast toast--${toast.tone}`} role="status">
-      <span>
+    <div
+      className="toast-enter fixed top-[82px] right-[21px] z-30 flex min-h-[46px] min-w-[260px] max-w-[410px] items-center gap-[9px] rounded-lg border border-[#cfdbe6] bg-white px-3.5 py-2.5 text-xs text-[#43566a] shadow-[0_12px_35px_rgb(20_42_66/14%)]"
+      role="status"
+    >
+      <span
+        className={`grid size-[27px] shrink-0 place-items-center rounded-full ${toneIconClass[toast.tone]}`}
+      >
         <Icon name={toast.tone === "success" ? "check" : "info"} size={17} />
       </span>
       {toast.message}
diff --git a/frontend/app/components/common/Topbar.tsx b/frontend/app/components/common/Topbar.tsx
index 22e7dcd..2baf978 100644
--- a/frontend/app/components/common/Topbar.tsx
+++ b/frontend/app/components/common/Topbar.tsx
@@ -32,80 +32,104 @@ export function Topbar({
   };
 
   return (
-    <header className="topbar">
-      <div className="page-title">
-        <button className="icon-button icon-button--back" type="button">
+    <header className="relative z-[2] flex h-[70px] min-h-[70px] items-center justify-between border-b border-[#dfe6ee] bg-white px-[22px]">
+      <div className="flex items-center gap-[9px]">
+        <button
+          className="grid h-[31px] w-[31px] rotate-180 cursor-pointer place-items-center rounded-[7px] border border-transparent bg-white text-[#7b8999] hover:border-[#b9c9da] hover:bg-[#f7faff]"
+          type="button"
+        >
           <Icon name="chevron" size={19} />
         </button>
         <div>
-          <span className="page-title__eyebrow">开发工作区</span>
-          <h1>{pageTitles[activePage] || "工作台"}</h1>
+          <span className="text-[10px] font-[650] uppercase tracking-[0.08em] text-[#94a2b3]">
+            开发工作区
+          </span>
+          <h1 className="m-0 mt-px text-[18px] leading-[1.1] text-[#14243a]">
+            {pageTitles[activePage] || "工作台"}
+          </h1>
         </div>
       </div>
-      <div className="topbar__actions">
-        <div className="api-state">
-          <span className={`api-state__dot${apiOnline ? " is-online" : ""}`} />
+      <div className="flex items-center gap-[14px]">
+        <div className="flex items-center gap-[7px] text-xs text-[#768597] max-xl:hidden">
+          <span
+            className={`size-[7px] rounded-full ${
+              apiOnline
+                ? "bg-[#19b878] shadow-[0_0_0_3px_rgb(25_184_120_/_11%)]"
+                : "bg-[#d05151] shadow-[0_0_0_3px_rgb(208_81_81_/_10%)]"
+            }`}
+          />
           {apiOnline ? "服务已连接" : "服务未连接"}
         </div>
-        <div className="topbar-menu-wrap">
+        <div className="relative flex items-center gap-[9px]">
           <button
-            className="workspace-switcher"
+            className="flex h-[46px] cursor-pointer items-center gap-[9px] rounded-lg border border-[#e0e7ee] bg-white px-[11px] hover:border-[#b9cce0]"
             type="button"
             onClick={() => onSetWorkspaceMenuOpen(!workspaceMenuOpen)}
           >
-            <span className="workspace-switcher__icon">
+            <span className="grid size-[30px] place-items-center rounded-[7px] bg-gradient-to-br from-[#23aa73] to-[#158d5d] text-white">
               <Icon name="workspace" size={18} />
             </span>
-            <span>
-              <small>当前 Workspace</small>
-              <strong>{currentWorkspace.workspace_name}</strong>
+            <span className="flex min-w-[155px] max-xl:min-w-[130px] flex-col items-start">
+              <small className="text-[10px] text-[#97a3b1]">当前 Workspace</small>
+              <strong className="max-w-[190px] truncate text-[13px] text-[#26384d]">
+                {currentWorkspace.workspace_name}
+              </strong>
             </span>
             <Icon name="chevron" size={15} />
           </button>
           {workspaceMenuOpen && (
-            <div className="topbar-dropdown">
-              {workspaces.map((workspace) => (
-                <button
-                  className={
-                    workspace.workspace_id === currentWorkspace.workspace_id
-                      ? "is-selected"
-                      : ""
-                  }
-                  type="button"
-                  key={workspace.workspace_id}
-                  onClick={() => {
-                    onSetCurrentWorkspace(workspace.workspace_id);
-                    onSetWorkspaceMenuOpen(false);
-                  }}
-                >
-                  <Icon name="workspace" size={15} />
-                  <span>
-                    <strong>{workspace.workspace_name}</strong>
-                    <small>
-                      {workspace.workspace_id === currentWorkspace.workspace_id
-                        ? "当前使用"
-                        : "点击切换"}
-                    </small>
-                  </span>
-                </button>
-              ))}
+            <div className="absolute top-[calc(100%+7px)] right-0 z-50 w-[260px] rounded-lg border border-[#dce5ed] bg-white p-1.5 shadow-[0_14px_38px_rgb(17_43_70_/_18%)]">
+              {workspaces.map((workspace) => {
+                const isSelected =
+                  workspace.workspace_id === currentWorkspace.workspace_id;
+                return (
+                  <button
+                    className={`flex w-full cursor-pointer items-center gap-2.5 rounded-md border-0 px-2.5 py-2 text-left text-[#40576d] ${
+                      isSelected
+                        ? "bg-brand-soft"
+                        : "bg-transparent hover:bg-brand-soft"
+                    }`}
+                    type="button"
+                    key={workspace.workspace_id}
+                    onClick={() => {
+                      onSetCurrentWorkspace(workspace.workspace_id);
+                      onSetWorkspaceMenuOpen(false);
+                    }}
+                  >
+                    <Icon name="workspace" size={15} />
+                    <span className="flex min-w-0 flex-col gap-0.5">
+                      <strong className="truncate text-[11px] text-[#243a50]">
+                        {workspace.workspace_name}
+                      </strong>
+                      <small className="text-[9px] text-[#8797a7]">
+                        {isSelected ? "当前使用" : "点击切换"}
+                      </small>
+                    </span>
+                  </button>
+                );
+              })}
             </div>
           )}
         </div>
-        <div className="topbar-menu-wrap">
-          <button className="user-menu" type="button">
-            <span className="avatar">
+        <div className="relative flex items-center gap-[9px]">
+          <button
+            className="flex h-[46px] cursor-pointer items-center gap-[9px] rounded-lg border border-transparent bg-white px-[11px] hover:border-[#b9cce0]"
+            type="button"
+          >
+            <span className="grid size-[34px] place-items-center rounded-full bg-gradient-to-br from-[#3b92ed] to-[#1869c9] text-sm font-bold text-white">
               {user?.display_name?.slice(0, 1) ?? "?"}
             </span>
-            <span className="user-menu__copy">
-              <strong>{user?.display_name ?? "未知用户"}</strong>
-              <small>
+            <span className="flex min-w-[50px] flex-col items-start">
+              <strong className="max-w-[190px] truncate text-[13px] text-[#26384d]">
+                {user?.display_name ?? "未知用户"}
+              </strong>
+              <small className="text-[10px] text-[#97a3b1]">
                 {user?.role_code === "admin" ? "管理员" : "开发人员"}
               </small>
             </span>
           </button>
           <button
-            className="text-button"
+            className="inline-flex cursor-pointer items-center gap-0.5 border-0 bg-transparent px-px py-[5px] text-xs font-semibold text-[#1474d4] hover:text-[#0d58a2]"
             type="button"
             onClick={() => {
               void onLogout();
diff --git a/frontend/app/components/common/WelcomePanel.tsx b/frontend/app/components/common/WelcomePanel.tsx
index a7e0336..8149818 100644
--- a/frontend/app/components/common/WelcomePanel.tsx
+++ b/frontend/app/components/common/WelcomePanel.tsx
@@ -1,4 +1,5 @@
 import Icon from "./Icon";
+import { primaryButtonClass } from "../../features/platform/modalUi";
 
 type WelcomePanelProps = {
   onCreateScript: () => void;
@@ -6,16 +7,20 @@ type WelcomePanelProps = {
 
 export function WelcomePanel({ onCreateScript }: WelcomePanelProps) {
   return (
-    <div className="welcome-panel">
-      <div className="welcome-panel__visual">
+    <div className="welcome-panel-shell flex min-h-full flex-col items-center justify-center p-[35px] text-center">
+      <div className="mb-[21px] grid size-[86px] place-items-center rounded-[25px] border border-[#cfe0f0] bg-gradient-to-br from-white to-[#eaf4fd] text-[#3d8cd9] shadow-[0_16px_35px_rgb(40_103_165/12%)]">
         <Icon name="script" size={42} />
       </div>
-      <span className="welcome-panel__label">构建脚本工作台</span>
-      <h2>创建你的第一个模型脚本</h2>
-      <p>
+      <span className="text-[10px] font-extrabold tracking-[0.12em] text-[#2e81ce]">
+        构建脚本工作台
+      </span>
+      <h2 className="mb-[7px] mt-[9px] text-[23px] text-[#21354c]">
+        创建你的第一个模型脚本
+      </h2>
+      <p className="mb-[22px] w-full max-w-[430px] text-xs leading-[1.8] text-[#76879a]">
         通过 Notebook 完成数据探索，或使用 Python 脚本构建可调度的处理任务。
       </p>
-      <button className="primary-button" onClick={onCreateScript}>
+      <button className={primaryButtonClass} type="button" onClick={onCreateScript}>
         <Icon name="plus" size={17} />
         新建构建脚本
       </button>
diff --git a/frontend/app/features/admin/DashboardPage.tsx b/frontend/app/features/admin/DashboardPage.tsx
index 3c0a960..f9c4794 100644
--- a/frontend/app/features/admin/DashboardPage.tsx
+++ b/frontend/app/features/admin/DashboardPage.tsx
@@ -1,8 +1,19 @@
 import Icon from "../../components/common/Icon";
 import { useAuth } from "../../context/AuthContext";
 
-import "../../styles/admin.css";
-import "../../styles/dashboard.css";
+const TREND_VALUES = [38, 55, 44, 73, 61, 86, 78] as const;
+const TREND_LABELS = ["周一", "周二", "周三", "周四", "周五", "周六", "今天"] as const;
+
+const ACTIVITY_ROWS = [
+  ["数据探索.ipynb 发布稳定版本 v3.0", "张三", "成功", "16:42"],
+  ["每日模型训练流程完成调度运行", "Scheduler", "成功", "15:25"],
+  ["批量预测.py 更新工作副本", "王五", "已同步", "14:18"],
+  ["风险验证流程完成 DAG 校验", "李四", "成功", "11:06"],
+] as const;
+
+function LegendDot({ className }: { className: string }) {
+  return <i className={`inline-block size-[7px] rounded-full ${className}`} />;
+}
 
 export function DashboardPage({
   scriptCount,
@@ -15,71 +26,217 @@ export function DashboardPage({
 }) {
   const { user, currentWorkspace } = useAuth();
   const isSystemAdmin = user?.is_system_admin ?? false;
+  const notebookCount = Math.max(1, Math.round(scriptCount * 0.67));
+  const pythonCount = Math.max(0, scriptCount - Math.round(scriptCount * 0.67));
 
   return (
-    <section className="dashboard-page">
-      <div className="dashboard-hero">
+    <section className="h-full overflow-auto bg-bg p-6">
+      <div className="dashboard-hero-shell flex items-center justify-between rounded-xl px-[34px] py-[34px] text-white shadow-[0_12px_30px_rgb(19_80_137/18%)]">
         <div>
-          <span>MODEL DEVELOPMENT PLATFORM</span>
-          <h2>下午好，{user?.display_name ?? "用户"}</h2>
-          <p>
+          <span className="text-[10px] tracking-[0.12em] opacity-80">
+            MODEL DEVELOPMENT PLATFORM
+          </span>
+          <h2 className="my-2 mb-[5px] text-[25px]">
+            下午好，{user?.display_name ?? "用户"}
+          </h2>
+          <p className="m-0 text-xs opacity-90">
             当前位于 {currentWorkspace?.workspace_name ?? "（未选择 Workspace）"}
             ，可以继续构建脚本或配置调度。
           </p>
         </div>
-        <span className="dashboard-hero__badge">{online ? "服务正常" : "服务连接中"}</span>
+        <span className="rounded-[20px] bg-white/16 px-3 py-2 text-sm">
+          {online ? "服务正常" : "服务连接中"}
+        </span>
       </div>
-      <div className="dashboard-metrics">
-        <article><Icon name="script" /><span><b>{scriptCount}</b><small>工作副本</small></span></article>
-        <article><Icon name="workspace" /><span><b>2</b><small>Workspace</small></span></article>
-        <article><Icon name="settings" /><span><b>4</b><small>平台用户</small></span></article>
-        <article><Icon name="check" /><span><b>{online ? "正常" : "检查中"}</b><small>平台状态</small></span></article>
+
+      <div className="mt-[18px] grid grid-cols-4 gap-3.5">
+        {[
+          { icon: "script" as const, value: scriptCount, label: "工作副本" },
+          { icon: "workspace" as const, value: 2, label: "Workspace" },
+          { icon: "settings" as const, value: 4, label: "平台用户" },
+          {
+            icon: "check" as const,
+            value: online ? "正常" : "检查中",
+            label: "平台状态",
+          },
+        ].map((item) => (
+          <article
+            key={item.label}
+            className="flex items-center gap-3.5 rounded-[9px] border border-[#e0e8ef] bg-white p-5"
+          >
+            <span className="text-brand">
+              <Icon name={item.icon} />
+            </span>
+            <span className="flex flex-col">
+              <b className="text-[21px] text-[#20364c]">{item.value}</b>
+              <small className="text-[#8796a6]">{item.label}</small>
+            </span>
+          </article>
+        ))}
       </div>
-      <div className="dashboard-actions">
-        <button type="button" onClick={() => onNavigate("scripts")}><Icon name="script" />构建脚本</button>
-        <button type="button" onClick={() => onNavigate("schedules")}><Icon name="schedule" />调度配置</button>
+
+      <div className="mt-[18px] flex gap-3">
+        <button
+          type="button"
+          className="flex cursor-pointer items-center gap-2 rounded-[7px] border border-[#d8e4ef] bg-white px-[18px] py-[13px] text-[#346587]"
+          onClick={() => onNavigate("scripts")}
+        >
+          <Icon name="script" />
+          构建脚本
+        </button>
+        <button
+          type="button"
+          className="flex cursor-pointer items-center gap-2 rounded-[7px] border border-[#d8e4ef] bg-white px-[18px] py-[13px] text-[#346587]"
+          onClick={() => onNavigate("schedules")}
+        >
+          <Icon name="schedule" />
+          调度配置
+        </button>
         {isSystemAdmin && (
-          <button type="button" onClick={() => onNavigate("system")}><Icon name="settings" />系统管理</button>
+          <button
+            type="button"
+            className="flex cursor-pointer items-center gap-2 rounded-[7px] border border-[#d8e4ef] bg-white px-[18px] py-[13px] text-[#346587]"
+            onClick={() => onNavigate("system")}
+          >
+            <Icon name="settings" />
+            系统管理
+          </button>
         )}
       </div>
-      <div className="dashboard-grid">
-        <section className="dashboard-panel dashboard-panel--trend">
-          <header><div><span>运行趋势</span><h3>近 7 天调度执行</h3></div><b>成功率 92.6%</b></header>
-          <div className="trend-chart">
-            {[38, 55, 44, 73, 61, 86, 78].map((value, index) => (
-              <div className="trend-column" key={index}>
-                <span className="trend-column__value">{Math.round(value / 7)}</span>
-                <i style={{ height: `${value}%` }} />
-                <small>{["周一", "周二", "周三", "周四", "周五", "周六", "今天"][index]}</small>
+
+      <div className="mt-[18px] grid gap-3.5 pb-[25px] max-[1200px]:grid-cols-1 min-[1201px]:grid-cols-[minmax(0,1.6fr)_minmax(310px,0.9fr)]">
+        <section className="rounded-[10px] border border-[#dfe7ee] bg-white shadow-[0_5px_16px_rgb(33_65_97/5%)]">
+          <header className="flex items-center justify-between border-b border-line-soft px-5 py-[17px]">
+            <div>
+              <span className="text-[9px] font-extrabold tracking-[0.09em] text-[#7890a6]">
+                运行趋势
+              </span>
+              <h3 className="mt-1 text-sm text-[#263b50]">近 7 天调度执行</h3>
+            </div>
+            <b className="rounded-[13px] bg-[#e8f8f1] px-[9px] py-[5px] text-[10px] text-[#16855a]">
+              成功率 92.6%
+            </b>
+          </header>
+          <div className="trend-chart-bg flex h-[190px] items-end gap-[18px] px-7 pb-[17px] pt-[26px]">
+            {TREND_VALUES.map((value, index) => (
+              <div
+                className="flex h-full flex-1 flex-col items-center justify-end gap-[5px]"
+                key={TREND_LABELS[index]}
+              >
+                <span className="text-[9px] text-[#7890a3]">
+                  {Math.round(value / 7)}
+                </span>
+                <i
+                  className="block min-h-3 w-[min(36px,72%)] rounded-t-[5px] rounded-b-[2px] bg-gradient-to-b from-[#49a0eb] to-[#207bd1] shadow-[0_4px_9px_rgb(32_123_209/18%)]"
+                  style={{ height: `${value}%` }}
+                />
+                <small className="text-[9px] text-[#7890a3]">
+                  {TREND_LABELS[index]}
+                </small>
               </div>
             ))}
           </div>
-          <footer><span><i className="legend-dot is-success" />成功 75</span><span><i className="legend-dot is-failed" />失败 6</span></footer>
+          <footer className="flex justify-center gap-[22px] p-2.5 text-[9px] text-[#708397]">
+            <span className="flex items-center gap-[5px]">
+              <LegendDot className="bg-[#27b87c]" />
+              成功 75
+            </span>
+            <span className="flex items-center gap-[5px]">
+              <LegendDot className="bg-[#ed7777]" />
+              失败 6
+            </span>
+          </footer>
         </section>
-        <section className="dashboard-panel dashboard-panel--donut">
-          <header><div><span>脚本资产</span><h3>类型分布</h3></div></header>
-          <div className="donut-layout">
-            <div className="donut-chart"><span><b>{scriptCount}</b><small>全部脚本</small></span></div>
-            <div className="donut-legend">
-              <span><i className="legend-dot is-notebook" /><b>Notebook</b><small>{Math.max(1, Math.round(scriptCount * .67))} 个 · 67%</small></span>
-              <span><i className="legend-dot is-python" /><b>Python</b><small>{Math.max(0, scriptCount - Math.round(scriptCount * .67))} 个 · 33%</small></span>
-              <span><i className="legend-dot is-version" /><b>稳定版本</b><small>3 个已发布</small></span>
+
+        <section className="rounded-[10px] border border-[#dfe7ee] bg-white shadow-[0_5px_16px_rgb(33_65_97/5%)]">
+          <header className="flex items-center justify-between border-b border-line-soft px-5 py-[17px]">
+            <div>
+              <span className="text-[9px] font-extrabold tracking-[0.09em] text-[#7890a6]">
+                脚本资产
+              </span>
+              <h3 className="mt-1 text-sm text-[#263b50]">类型分布</h3>
+            </div>
+          </header>
+          <div className="flex min-h-[226px] items-center justify-center gap-7 p-5">
+            <div className="dashboard-donut relative grid size-32 shrink-0 place-items-center rounded-full">
+              <span className="z-[1] flex flex-col items-center">
+                <b className="text-xl text-[#273d53]">{scriptCount}</b>
+                <small className="text-[8px] text-[#8a9aaa]">全部脚本</small>
+              </span>
+            </div>
+            <div className="flex flex-col gap-[15px]">
+              {[
+                {
+                  color: "bg-[#318de0]",
+                  title: "Notebook",
+                  detail: `${notebookCount} 个 · 67%`,
+                },
+                {
+                  color: "bg-[#72c9b0]",
+                  title: "Python",
+                  detail: `${pythonCount} 个 · 33%`,
+                },
+                {
+                  color: "bg-[#f3b75c]",
+                  title: "稳定版本",
+                  detail: "3 个已发布",
+                },
+              ].map((item) => (
+                <span
+                  key={item.title}
+                  className="grid grid-cols-[8px_1fr] items-center gap-x-[7px]"
+                >
+                  <LegendDot className={item.color} />
+                  <b className="text-[10px] text-[#40566c]">{item.title}</b>
+                  <small className="col-start-2 text-[8px] text-[#8a9baa]">
+                    {item.detail}
+                  </small>
+                </span>
+              ))}
             </div>
           </div>
         </section>
-        <section className="dashboard-panel dashboard-panel--activity">
-          <header><div><span>ACTIVITY</span><h3>最近平台活动</h3></div><button type="button">查看全部</button></header>
-          <div className="activity-table">
-            <div className="activity-table__head"><span>操作内容</span><span>执行人</span><span>状态</span><span>时间</span></div>
-            {[
-              ["数据探索.ipynb 发布稳定版本 v3.0", "张三", "成功", "16:42"],
-              ["每日模型训练流程完成调度运行", "Scheduler", "成功", "15:25"],
-              ["批量预测.py 更新工作副本", "王五", "已同步", "14:18"],
-              ["风险验证流程完成 DAG 校验", "李四", "成功", "11:06"],
-            ].map((row) => (
-              <div className="activity-row" key={row[0]}>
-                <span><i className="activity-icon"><Icon name="check" size={13} /></i>{row[0]}</span>
-                <span>{row[1]}</span><span><b>{row[2]}</b></span><span>{row[3]}</span>
+
+        <section className="col-span-full rounded-[10px] border border-[#dfe7ee] bg-white shadow-[0_5px_16px_rgb(33_65_97/5%)] max-[1200px]:col-auto">
+          <header className="flex items-center justify-between border-b border-line-soft px-5 py-[17px]">
+            <div>
+              <span className="text-[9px] font-extrabold tracking-[0.09em] text-[#7890a6]">
+                ACTIVITY
+              </span>
+              <h3 className="mt-1 text-sm text-[#263b50]">最近平台活动</h3>
+            </div>
+            <button
+              type="button"
+              className="border-0 bg-transparent text-[10px] text-[#257bcb]"
+            >
+              查看全部
+            </button>
+          </header>
+          <div>
+            <div className="grid grid-cols-[2fr_0.7fr_0.55fr_0.5fr] items-center gap-[15px] bg-[#f7f9fb] px-5 py-[11px] text-[9px] font-bold text-[#8595a5]">
+              <span>操作内容</span>
+              <span>执行人</span>
+              <span>状态</span>
+              <span>时间</span>
+            </div>
+            {ACTIVITY_ROWS.map((row) => (
+              <div
+                className="grid grid-cols-[2fr_0.7fr_0.55fr_0.5fr] items-center gap-[15px] border-t border-line-soft px-5 py-[11px] text-[10px] text-[#607488]"
+                key={row[0]}
+              >
+                <span className="flex items-center gap-[9px] text-[#344c63]">
+                  <i className="grid size-[25px] place-items-center rounded-md bg-[#eaf4ff] text-[#277fcc]">
+                    <Icon name="check" size={13} />
+                  </i>
+                  {row[0]}
+                </span>
+                <span>{row[1]}</span>
+                <span>
+                  <b className="rounded-[10px] bg-[#e9f8f2] px-[7px] py-[3px] text-[9px] text-[#16855a]">
+                    {row[2]}
+                  </b>
+                </span>
+                <span>{row[3]}</span>
               </div>
             ))}
           </div>
diff --git a/frontend/app/features/admin/ProjectManagementPage.tsx b/frontend/app/features/admin/ProjectManagementPage.tsx
index 92b8272..51e4820 100644
--- a/frontend/app/features/admin/ProjectManagementPage.tsx
+++ b/frontend/app/features/admin/ProjectManagementPage.tsx
@@ -4,6 +4,21 @@ import { ApiRequestError, type Employee, type Workspace, type WorkspaceMember }
 import { useApi, useAuth } from "../../context/AuthContext";
 import Icon from "../../components/common/Icon";
 import { UserMultiSelect } from "./UserMultiSelect";
+import {
+  formFieldClass,
+  formInputClass,
+  formTextareaClass,
+  iconButtonClass,
+  modalBackdropClass,
+  modalCompactClass,
+  modalEyebrowClass,
+  modalFooterClass,
+  modalFormClass,
+  modalHeaderClass,
+  modalTitleClass,
+  primaryButtonClass,
+  secondaryButtonClass,
+} from "../platform/modalUi";
 
 import "../../styles/admin.css";
 
@@ -199,24 +214,6 @@ export function ProjectManagementPage({
     }
   };
 
-  const updateMemberRole = async (userId: string, roleCode: "admin" | "developer"): Promise<void> => {
-    if (!selectedProject) return;
-    try {
-      const updated = await api.updateWorkspaceMember(selectedProject.workspace_id, userId, {
-        role_code: roleCode,
-      });
-      setCurrentProjectMembers((current) =>
-        current.map((m) => (m.user_id === userId ? { ...m, role_code: roleCode, role_name: roleCode === "admin" ? "管理员" : "开发人员" } : m))
-      );
-      onNotify({ tone: "success", message: "成员角色已更新" });
-    } catch (error) {
-      onNotify({
-        tone: "error",
-        message: error instanceof ApiRequestError ? error.message : "更新成员角色失败",
-      });
-    }
-  };
-
   const importMember = async (): Promise<void> => {
     if (!selectedProject || selectedUserIds.length === 0) {
       onNotify({ tone: "error", message: "请选择要添加的用户" });
@@ -327,20 +324,23 @@ export function ProjectManagementPage({
       </div>
 
       {projectDialogOpen && (
-        <div className="modal-backdrop">
-          <section className="modal modal--compact" role="dialog" aria-modal="true">
-            <div className="modal__header">
+        <div className={modalBackdropClass} role="presentation">
+          <section className={modalCompactClass} role="dialog" aria-modal="true">
+            <div className={modalHeaderClass}>
               <div>
-                <span className="modal__eyebrow">PROJECT</span>
-                <h2>{editingProject ? "编辑项目" : "新建项目"}</h2>
+                <span className={modalEyebrowClass}>PROJECT</span>
+                <h2 className={modalTitleClass}>{editingProject ? "编辑项目" : "新建项目"}</h2>
               </div>
-              <button className="icon-button" type="button" onClick={() => setProjectDialogOpen(false)}><Icon name="close" /></button>
+              <button className={iconButtonClass} type="button" aria-label="关闭" onClick={() => setProjectDialogOpen(false)}>
+                <Icon name="close" />
+              </button>
             </div>
-            <form onSubmit={(event) => void submitProject(event)}>
+            <form className={modalFormClass} onSubmit={(event) => void submitProject(event)}>
               {!editingProject && (
-                <label className="form-field">
-                  <span>项目编码<span className="required">*</span></span>
+                <label className={formFieldClass}>
+                  <span>项目编码<span className="text-[#e74c3c]">*</span></span>
                   <input
+                    className={formInputClass}
                     autoFocus
                     value={projectForm.workspace_code}
                     onChange={(event) => setProjectForm({ ...projectForm, workspace_code: event.target.value })}
@@ -348,35 +348,38 @@ export function ProjectManagementPage({
                   />
                 </label>
               )}
-              <label className="form-field">
-                <span>项目名称<span className="required">*</span></span>
+              <label className={formFieldClass}>
+                <span>项目名称<span className="text-[#e74c3c]">*</span></span>
                 <input
+                  className={formInputClass}
                   value={projectForm.workspace_name}
                   onChange={(event) => setProjectForm({ ...projectForm, workspace_name: event.target.value })}
                   placeholder="请输入项目名称"
                 />
               </label>
-              <label className="form-field">
+              <label className={formFieldClass}>
                 <span>配额（字节）</span>
                 <input
+                  className={formInputClass}
                   type="number"
                   value={projectForm.quota_bytes}
                   onChange={(event) => setProjectForm({ ...projectForm, quota_bytes: parseInt(event.target.value) || 0 })}
                   placeholder="0 表示无配额限制"
                 />
               </label>
-              <label className="form-field">
+              <label className={formFieldClass}>
                 <span>项目描述</span>
                 <textarea
+                  className={formTextareaClass}
                   value={projectForm.description}
                   onChange={(event) => setProjectForm({ ...projectForm, description: event.target.value })}
                   placeholder="请输入项目描述（可选）"
                   rows={4}
                 />
               </label>
-              <div className="modal__footer">
-                <button className="secondary-button" type="button" onClick={() => setProjectDialogOpen(false)}>取消</button>
-                <button className="primary-button" type="submit" disabled={saving}>{saving ? "保存中…" : "保存"}</button>
+              <div className={modalFooterClass}>
+                <button className={secondaryButtonClass} type="button" onClick={() => setProjectDialogOpen(false)}>取消</button>
+                <button className={primaryButtonClass} type="submit" disabled={saving}>{saving ? "保存中…" : "保存"}</button>
               </div>
             </form>
           </section>
@@ -384,18 +387,20 @@ export function ProjectManagementPage({
       )}
 
       {importMemberDialogOpen && (
-        <div className="modal-backdrop">
-          <section className="modal modal--compact" role="dialog" aria-modal="true">
-            <div className="modal__header">
+        <div className={modalBackdropClass} role="presentation">
+          <section className={modalCompactClass} role="dialog" aria-modal="true">
+            <div className={modalHeaderClass}>
               <div>
-                <span className="modal__eyebrow">IMPORT MEMBER</span>
-                <h2>导入成员到 {selectedProject?.workspace_name ?? "项目"}</h2>
+                <span className={modalEyebrowClass}>IMPORT MEMBER</span>
+                <h2 className={modalTitleClass}>导入成员到 {selectedProject?.workspace_name ?? "项目"}</h2>
               </div>
-              <button className="icon-button" type="button" onClick={() => setImportMemberDialogOpen(false)}><Icon name="close" /></button>
+              <button className={iconButtonClass} type="button" aria-label="关闭" onClick={() => setImportMemberDialogOpen(false)}>
+                <Icon name="close" />
+              </button>
             </div>
-            <form >
-              <label className="form-field"  style={{ paddingBottom: 120 }}>
-                <span>选择用户<span className="required">*</span></span>
+            <form className={modalFormClass}>
+              <label className={`${formFieldClass} pb-[120px]`}>
+                <span>选择用户<span className="text-[#e74c3c]">*</span></span>
                 <UserMultiSelect
                   users={availableUsers}
                   selectedUserIds={selectedUserIds}
@@ -403,9 +408,9 @@ export function ProjectManagementPage({
                   existingMemberIds={currentProjectMembers.map((m) => m.user_id)}
                 />
               </label>
-              <div className="modal__footer">
-                <button className="secondary-button" type="button" onClick={() => setImportMemberDialogOpen(false)}>取消</button>
-                <button className="primary-button" type="button" disabled={saving || selectedUserIds.length === 0} onClick={() => void importMember()}>
+              <div className={modalFooterClass}>
+                <button className={secondaryButtonClass} type="button" onClick={() => setImportMemberDialogOpen(false)}>取消</button>
+                <button className={primaryButtonClass} type="button" disabled={saving || selectedUserIds.length === 0} onClick={() => void importMember()}>
                   {saving ? "添加中…" : `添加 (${selectedUserIds.length})`}
                 </button>
               </div>
diff --git a/frontend/app/features/admin/UserManagementPage.tsx b/frontend/app/features/admin/UserManagementPage.tsx
index 973cab8..3716a59 100644
--- a/frontend/app/features/admin/UserManagementPage.tsx
+++ b/frontend/app/features/admin/UserManagementPage.tsx
@@ -3,6 +3,20 @@ import { useEffect, useState } from "react";
 import { ApiRequestError, type Employee } from "../../services/api";
 import { useApi, useAuth } from "../../context/AuthContext";
 import Icon from "../../components/common/Icon";
+import {
+  formFieldClass,
+  formInputClass,
+  iconButtonClass,
+  modalBackdropClass,
+  modalCompactClass,
+  modalEyebrowClass,
+  modalFooterClass,
+  modalFormClass,
+  modalHeaderClass,
+  modalTitleClass,
+  primaryButtonClass,
+  secondaryButtonClass,
+} from "../platform/modalUi";
 
 import "../../styles/admin.css";
 
@@ -215,28 +229,32 @@ export function UserManagementPage({
       </div>
 
       {dialogOpen && (
-        <div className="modal-backdrop">
-          <section className="modal modal--compact" role="dialog" aria-modal="true">
-            <div className="modal__header">
+        <div className={modalBackdropClass} role="presentation">
+          <section className={modalCompactClass} role="dialog" aria-modal="true">
+            <div className={modalHeaderClass}>
               <div>
-                <span className="modal__eyebrow">EMPLOYEE</span>
-                <h2>{editing ? "编辑用户" : "添加用户"}</h2>
+                <span className={modalEyebrowClass}>EMPLOYEE</span>
+                <h2 className={modalTitleClass}>{editing ? "编辑用户" : "添加用户"}</h2>
               </div>
-              <button className="icon-button" type="button" onClick={() => setDialogOpen(false)}><Icon name="close" /></button>
+              <button className={iconButtonClass} type="button" aria-label="关闭" onClick={() => setDialogOpen(false)}>
+                <Icon name="close" />
+              </button>
             </div>
-            <form onSubmit={(event) => void submit(event)}>
-              <label className="form-field">
-                <span>姓名<span className="required">*</span></span>
+            <form className={modalFormClass} onSubmit={(event) => void submit(event)}>
+              <label className={formFieldClass}>
+                <span>姓名<span className="text-[#e74c3c]">*</span></span>
                 <input
+                  className={formInputClass}
                   autoFocus={!editing}
                   value={form.display_name}
                   onChange={(event) => setForm({ ...form, display_name: event.target.value })}
                   placeholder="请输入姓名"
                 />
               </label>
-              <label className="form-field">
-                <span>登录账号<span className="required">*</span></span>
+              <label className={formFieldClass}>
+                <span>登录账号<span className="text-[#e74c3c]">*</span></span>
                 <input
+                  className={formInputClass}
                   disabled={Boolean(editing)}
                   value={form.username}
                   onChange={(event) => setForm({ ...form, username: event.target.value })}
@@ -245,9 +263,10 @@ export function UserManagementPage({
                 />
               </label>
               {!editing && (
-                <label className="form-field">
-                  <span>密码<span className="required">*</span></span>
+                <label className={formFieldClass}>
+                  <span>密码<span className="text-[#e74c3c]">*</span></span>
                   <input
+                    className={formInputClass}
                     type="password"
                     autoComplete="new-password"
                     value={form.password}
@@ -256,9 +275,10 @@ export function UserManagementPage({
                   />
                 </label>
               )}
-              <label className="form-field">
+              <label className={formFieldClass}>
                 <span>邮箱</span>
                 <input
+                  className={formInputClass}
                   type="email"
                   autoComplete="email"
                   value={form.email}
@@ -266,26 +286,24 @@ export function UserManagementPage({
                   placeholder="请输入邮箱（可选）"
                 />
               </label>
-              {/* <label className="form-field">
-                <span>角色</span>
-                <select value={form.role_code} disabled={Boolean(editing) && ((editing as Employee).user_id === user?.user_id || (editing as Employee).role_code === "admin")} onChange={(event) => setForm({ ...form, role_code: event.target.value as "admin" | "developer" })}>
-                  <option value="developer">开发人员</option>
-                  <option value="admin">管理员</option>
-                </select>
-              </label> */}
               {editing && (
-                <label className="form-field">
+                <label className={formFieldClass}>
                   <span>状态</span>
-                  <select value={form.status} disabled={Boolean(editing) && ((editing as Employee).user_id === user?.user_id || (editing as Employee).role_code === "admin")} onChange={(event) => setForm({ ...form, status: event.target.value as typeof form.status })}>
+                  <select
+                    className={formInputClass}
+                    value={form.status}
+                    disabled={Boolean(editing) && (editing.user_id === user?.user_id || editing.role_code === "admin")}
+                    onChange={(event) => setForm({ ...form, status: event.target.value as typeof form.status })}
+                  >
                     <option value="active">正常</option>
                     <option value="disabled">停用</option>
                     <option value="locked">锁定</option>
                   </select>
                 </label>
               )}
-              <div className="modal__footer">
-                <button className="secondary-button" type="button" onClick={() => setDialogOpen(false)}>取消</button>
-                <button className="primary-button" type="submit" disabled={saving}>{saving ? "保存中…" : "保存"}</button>
+              <div className={modalFooterClass}>
+                <button className={secondaryButtonClass} type="button" onClick={() => setDialogOpen(false)}>取消</button>
+                <button className={primaryButtonClass} type="submit" disabled={saving}>{saving ? "保存中…" : "保存"}</button>
               </div>
             </form>
           </section>
diff --git a/frontend/app/features/admin/state/adminStore.ts b/frontend/app/features/admin/state/adminStore.ts
index 8fbd3b3..47acc24 100644
--- a/frontend/app/features/admin/state/adminStore.ts
+++ b/frontend/app/features/admin/state/adminStore.ts
@@ -194,7 +194,6 @@ type Actions = {
   importMembers: (
     workspace: Workspace,
     user_ids: string[],
-    role_code: "admin" | "developer",
     onNotify: (n: Notice) => void,
   ) => Promise<void>;
 };
@@ -453,14 +452,13 @@ export const useAdminStore = create<State & Actions>((set, get) => ({
     }
   },
 
-  importMembers: async (workspace, user_ids, role_code, onNotify) => {
+  importMembers: async (workspace, user_ids, onNotify) => {
     const api = requireApi();
     try {
       await Promise.all(
         user_ids.map((uid) =>
           api.addWorkspaceMember(workspace.workspace_id, {
             user_id: uid,
-            role_code,
           }),
         ),
       );
diff --git a/frontend/app/features/platform/CreateFolderModal.tsx b/frontend/app/features/platform/CreateFolderModal.tsx
index e862fb1..5fe92a7 100644
--- a/frontend/app/features/platform/CreateFolderModal.tsx
+++ b/frontend/app/features/platform/CreateFolderModal.tsx
@@ -1,5 +1,20 @@
 import { type FormEvent } from "react";
 import Icon from "../../components/common/Icon";
+import {
+  destinationChipClass,
+  formFieldClass,
+  formInputClass,
+  iconButtonClass,
+  modalBackdropClass,
+  modalCompactClass,
+  modalEyebrowClass,
+  modalFooterClass,
+  modalFormClass,
+  modalHeaderClass,
+  modalTitleClass,
+  primaryButtonClass,
+  secondaryButtonClass,
+} from "./modalUi";
 
 type CreateFolderModalProps = {
   open: boolean;
@@ -23,15 +38,15 @@ export function CreateFolderModal({
   if (!open) return null;
 
   return (
-    <div className="modal-backdrop" role="presentation">
-      <section className="modal modal--compact" role="dialog" aria-modal="true">
-        <div className="modal__header">
+    <div className={modalBackdropClass} role="presentation">
+      <section className={modalCompactClass} role="dialog" aria-modal="true">
+        <div className={modalHeaderClass}>
           <div>
-            <span className="modal__eyebrow">WORKSPACE</span>
-            <h2>新建文件夹</h2>
+            <span className={modalEyebrowClass}>WORKSPACE</span>
+            <h2 className={modalTitleClass}>新建文件夹</h2>
           </div>
           <button
-            className="icon-button"
+            className={iconButtonClass}
             type="button"
             aria-label="关闭"
             onClick={onClose}
@@ -39,14 +54,15 @@ export function CreateFolderModal({
             <Icon name="close" />
           </button>
         </div>
-        <form onSubmit={onSubmit}>
-          <div className="destination-chip">
+        <form className={modalFormClass} onSubmit={onSubmit}>
+          <div className={destinationChipClass}>
             <Icon name="folder" size={16} />
             创建到：{parentPath || "个人根目录"}
           </div>
-          <label className="form-field">
+          <label className={formFieldClass}>
             <span>文件夹名称</span>
             <input
+              className={formInputClass}
               autoFocus
               maxLength={255}
               placeholder="例如：模型训练"
@@ -54,16 +70,16 @@ export function CreateFolderModal({
               onChange={(event) => onNameChange(event.target.value)}
             />
           </label>
-          <div className="modal__footer">
+          <div className={modalFooterClass}>
             <button
-              className="secondary-button"
+              className={secondaryButtonClass}
               type="button"
               onClick={onClose}
             >
               取消
             </button>
             <button
-              className="primary-button"
+              className={primaryButtonClass}
               type="submit"
               disabled={busy || !name.trim()}
             >
diff --git a/frontend/app/features/platform/CreateScriptModal.tsx b/frontend/app/features/platform/CreateScriptModal.tsx
index e70ee0c..b4076fc 100644
--- a/frontend/app/features/platform/CreateScriptModal.tsx
+++ b/frontend/app/features/platform/CreateScriptModal.tsx
@@ -1,6 +1,22 @@
 import { type FormEvent } from "react";
 import Icon from "../../components/common/Icon";
 import type { ScriptType, Visibility } from "../../services/api";
+import {
+  destinationChipClass,
+  formFieldClass,
+  formHintClass,
+  formInputClass,
+  iconButtonClass,
+  modalBackdropClass,
+  modalEyebrowClass,
+  modalFooterClass,
+  modalFormClass,
+  modalHeaderClass,
+  modalPanelClass,
+  modalTitleClass,
+  primaryButtonClass,
+  secondaryButtonClass,
+} from "./modalUi";
 
 type NewScriptForm = {
   name: string;
@@ -27,44 +43,23 @@ export function CreateScriptModal({
   open,
   creating,
   form,
-  scripts,
+  scripts: _scripts,
   onFormChange,
   onSubmit,
   onClose,
 }: CreateScriptModalProps) {
   if (!open) return null;
 
-  const suffix = form.scriptType === "notebook" ? ".ipynb" : ".py";
-  const requestedName = form.name.trim();
-  const normalizedName = requestedName.toLocaleLowerCase().endsWith(suffix)
-    ? requestedName
-    : `${requestedName}${suffix}`;
-  const duplicate = scripts.some((script) => {
-    if (script.script_type !== form.scriptType) return false;
-    if (script.script_name.toLocaleLowerCase()
-      !== normalizedName.toLocaleLowerCase()) return false;
-    // Same name in a different subdirectory is allowed; mirror the
-    // backend name_clash scope (StorageObjects.relative_path JOIN).
-    if (!script.relative_path) return true;
-    const segments = script.relative_path.replaceAll("\\", "/")
-      .split("/").slice(2);
-    const existingUserPath = segments.join("/");
-    const existingParent = existingUserPath.includes("/")
-      ? existingUserPath.slice(0, existingUserPath.lastIndexOf("/"))
-      : "";
-    return existingParent === form.parentPath;
-  });
-
   return (
-    <div className="modal-backdrop" role="presentation">
-      <section className="modal" role="dialog" aria-modal="true">
-        <div className="modal__header">
+    <div className={modalBackdropClass} role="presentation">
+      <section className={modalPanelClass} role="dialog" aria-modal="true">
+        <div className={modalHeaderClass}>
           <div>
-            <span className="modal__eyebrow">工作副本</span>
-            <h2>新建构建脚本</h2>
+            <span className={modalEyebrowClass}>工作副本</span>
+            <h2 className={modalTitleClass}>新建构建脚本</h2>
           </div>
           <button
-            className="icon-button"
+            className={iconButtonClass}
             type="button"
             aria-label="关闭"
             onClick={onClose}
@@ -72,14 +67,15 @@ export function CreateScriptModal({
             <Icon name="close" />
           </button>
         </div>
-        <form onSubmit={onSubmit}>
-          <div className="destination-chip">
+        <form className={modalFormClass} onSubmit={onSubmit}>
+          <div className={destinationChipClass}>
             <Icon name="folder" size={16} />
             保存到：{form.parentPath || "个人根目录"}
           </div>
-          <label className="form-field">
+          <label className={formFieldClass}>
             <span>脚本名称</span>
             <input
+              className={formInputClass}
               autoFocus
               maxLength={255}
               placeholder={form.scriptType === "notebook"
@@ -92,57 +88,78 @@ export function CreateScriptModal({
                   name: event.target.value,
                 })}
             />
-            <small>
+            <small className={formHintClass}>
               系统会自动补充
               {form.scriptType === "notebook" ? " .ipynb" : " .py"} 后缀
             </small>
           </label>
 
-          <fieldset className="type-picker">
-            <legend>脚本类型</legend>
-            <button
-              className={form.scriptType === "notebook" ? "is-selected" : ""}
-              type="button"
-              onClick={() => onFormChange({
-                ...form,
-                scriptType: "notebook",
-              })}
-            >
-              <span className="type-picker__icon type-picker__icon--notebook">
-                <Icon name="notebook" size={22} />
-              </span>
-              <span>
-                <strong>Jupyter Notebook</strong>
-                <small>交互式数据探索与模型实验</small>
-              </span>
-              <span className="type-picker__check">
-                <Icon name="check" size={14} />
-              </span>
-            </button>
-            <button
-              className={form.scriptType === "python" ? "is-selected" : ""}
-              type="button"
-              onClick={() => onFormChange({
-                ...form,
-                scriptType: "python",
-              })}
-            >
-              <span className="type-picker__icon type-picker__icon--python">
-                <Icon name="python" size={23} />
-              </span>
-              <span>
-                <strong>Python 脚本</strong>
-                <small>批处理、训练和模型调用任务</small>
-              </span>
-              <span className="type-picker__check">
-                <Icon name="check" size={14} />
-              </span>
-            </button>
+          <fieldset className="mb-[17px] grid grid-cols-2 gap-[9px] border-0 p-0">
+            <legend className="mb-[7px] text-xs font-[650] text-[#3c4e62]">
+              脚本类型
+            </legend>
+            {(
+              [
+                {
+                  type: "notebook" as const,
+                  title: "Jupyter Notebook",
+                  desc: "交互式数据探索与模型实验",
+                  icon: "notebook" as const,
+                  iconTone: "bg-[#fff0ed] text-[#dd5a4c]",
+                  size: 22,
+                },
+                {
+                  type: "python" as const,
+                  title: "Python 脚本",
+                  desc: "批处理、训练和模型调用任务",
+                  icon: "python" as const,
+                  iconTone: "bg-[#e9f3ff] text-[#2a75c5]",
+                  size: 23,
+                },
+              ] as const
+            ).map((item) => {
+              const selected = form.scriptType === item.type;
+              return (
+                <button
+                  key={item.type}
+                  className={`relative flex min-h-[72px] cursor-pointer items-center gap-[9px] rounded-[7px] border p-2.5 text-left ${
+                    selected
+                      ? "border-[#4d98df] bg-[#f4f9ff] shadow-[0_0_0_2px_rgb(49_133_216/7%)]"
+                      : "border-[#dae2ea] bg-white hover:border-[#a9c6e1]"
+                  }`}
+                  type="button"
+                  onClick={() => onFormChange({
+                    ...form,
+                    scriptType: item.type,
+                  })}
+                >
+                  <span
+                    className={`grid size-[37px] shrink-0 place-items-center rounded-lg ${item.iconTone}`}
+                  >
+                    <Icon name={item.icon} size={item.size} />
+                  </span>
+                  <span className="flex min-w-0 flex-col">
+                    <strong className="text-[11px] text-[#34475b]">
+                      {item.title}
+                    </strong>
+                    <small className="mt-[3px] text-[8px] leading-[1.35] text-[#919eac]">
+                      {item.desc}
+                    </small>
+                  </span>
+                  {selected && (
+                    <span className="absolute top-1.5 right-1.5 grid size-[17px] place-items-center rounded-full bg-[#2e88dd] text-white">
+                      <Icon name="check" size={14} />
+                    </span>
+                  )}
+                </button>
+              );
+            })}
           </fieldset>
 
-          <label className="form-field">
+          <label className={formFieldClass}>
             <span>可见范围</span>
             <select
+              className={formInputClass}
               value={form.visibility}
               onChange={(event) =>
                 onFormChange({
@@ -156,16 +173,16 @@ export function CreateScriptModal({
             </select>
           </label>
 
-          <div className="modal__footer">
+          <div className={modalFooterClass}>
             <button
-              className="secondary-button"
+              className={secondaryButtonClass}
               type="button"
               onClick={onClose}
             >
               取消
             </button>
             <button
-              className="primary-button"
+              className={primaryButtonClass}
               type="submit"
               disabled={creating || !form.name.trim()}
             >
diff --git a/frontend/app/features/platform/DataResourceUploadModal.tsx b/frontend/app/features/platform/DataResourceUploadModal.tsx
index ac1038c..66db078 100644
--- a/frontend/app/features/platform/DataResourceUploadModal.tsx
+++ b/frontend/app/features/platform/DataResourceUploadModal.tsx
@@ -1,6 +1,22 @@
 import { type FormEvent } from "react";
 import Icon from "../../components/common/Icon";
 import type { Visibility } from "../../services/api";
+import {
+  formFieldClass,
+  formHintClass,
+  formInputClass,
+  formTextareaClass,
+  iconButtonClass,
+  modalBackdropClass,
+  modalCompactClass,
+  modalEyebrowClass,
+  modalFooterClass,
+  modalFormClass,
+  modalHeaderClass,
+  modalTitleClass,
+  primaryButtonClass,
+  secondaryButtonClass,
+} from "./modalUi";
 
 type DataResourceUploadModalProps = {
   open: boolean;
@@ -43,15 +59,15 @@ export function DataResourceUploadModal({
     : file?.name ?? "";
 
   return (
-    <div className="modal-backdrop" role="presentation">
-      <section className="modal modal--compact" role="dialog" aria-modal="true">
-        <div className="modal__header">
+    <div className={modalBackdropClass} role="presentation">
+      <section className={modalCompactClass} role="dialog" aria-modal="true">
+        <div className={modalHeaderClass}>
           <div>
-            <span className="modal__eyebrow">数据资源</span>
-            <h2>上传数据文件</h2>
+            <span className={modalEyebrowClass}>数据资源</span>
+            <h2 className={modalTitleClass}>上传数据文件</h2>
           </div>
           <button
-            className="icon-button"
+            className={iconButtonClass}
             type="button"
             aria-label="关闭"
             onClick={onClose}
@@ -59,14 +75,17 @@ export function DataResourceUploadModal({
             <Icon name="close" />
           </button>
         </div>
-        <form onSubmit={onSubmit}>
-          <label className="form-field">
+        <form className={modalFormClass} onSubmit={onSubmit}>
+          <label className={formFieldClass}>
             <span>已选文件</span>
-            <div>{file ? file.name : "未选择文件"}</div>
+            <div className="font-normal text-[#283a4e]">
+              {file ? file.name : "未选择文件"}
+            </div>
           </label>
-          <label className="form-field">
+          <label className={formFieldClass}>
             <span>资源名称</span>
             <input
+              className={formInputClass}
               autoFocus
               maxLength={255}
               placeholder="例如：训练数据"
@@ -75,24 +94,26 @@ export function DataResourceUploadModal({
               required
             />
           </label>
-          <label className="form-field">
+          <label className={formFieldClass}>
             <span>子目录</span>
             <input
+              className={formInputClass}
               type="text"
               maxLength={1024}
               placeholder="例如：train/v1（留空上传到当前目录）"
               value={targetPath}
               onChange={(event) => onTargetPathChange(event.target.value)}
             />
-            <small className="form-field__hint">
+            <small className={formHintClass}>
               {parentPath
                 ? `当前位于 ${parentPath || "根目录"} · 最终路径：${finalPath || "—"}`
                 : `最终路径：${finalPath || "—"}`}
             </small>
           </label>
-          <label className="form-field">
+          <label className={formFieldClass}>
             <span>可见性</span>
             <select
+              className={formInputClass}
               value={visibility}
               onChange={(event) =>
                 onVisibilityChange(event.target.value as Visibility)
@@ -103,18 +124,19 @@ export function DataResourceUploadModal({
               <option value="public">公开</option>
             </select>
           </label>
-          <label className="form-field">
+          <label className={formFieldClass}>
             <span>描述</span>
             <textarea
+              className={formTextareaClass}
               rows={3}
               placeholder="可选描述"
               value={description}
               onChange={(event) => onDescriptionChange(event.target.value)}
             />
           </label>
-          <div className="modal__footer">
+          <div className={modalFooterClass}>
             <button
-              className="secondary-button"
+              className={secondaryButtonClass}
               type="button"
               onClick={onClose}
               disabled={uploading}
@@ -122,7 +144,7 @@ export function DataResourceUploadModal({
               取消
             </button>
             <button
-              className="primary-button"
+              className={primaryButtonClass}
               type="submit"
               disabled={uploading || !resourceName.trim()}
             >
diff --git a/frontend/app/features/platform/PublishModal.tsx b/frontend/app/features/platform/PublishModal.tsx
index bb20c4d..cc83d3d 100644
--- a/frontend/app/features/platform/PublishModal.tsx
+++ b/frontend/app/features/platform/PublishModal.tsx
@@ -2,6 +2,22 @@ import { type FormEvent } from "react";
 import Icon from "../../components/common/Icon";
 import type { ScriptItem, Visibility } from "../../services/api";
 import { scriptIcon } from "../../features/platform/WorkspaceTree";
+import {
+  formFieldClass,
+  formHintClass,
+  formInputClass,
+  formTextareaClass,
+  iconButtonClass,
+  modalBackdropClass,
+  modalEyebrowClass,
+  modalFooterClass,
+  modalFormClass,
+  modalHeaderClass,
+  modalPanelClass,
+  modalTitleClass,
+  primaryButtonClass,
+  secondaryButtonClass,
+} from "./modalUi";
 
 type PublishModalProps = {
   publishTarget: ScriptItem | null;
@@ -27,15 +43,15 @@ export function PublishModal({
   if (!publishTarget) return null;
 
   return (
-    <div className="modal-backdrop" role="presentation">
-      <section className="modal publish-modal" role="dialog" aria-modal="true">
-        <div className="modal__header">
+    <div className={modalBackdropClass} role="presentation">
+      <section className={modalPanelClass} role="dialog" aria-modal="true">
+        <div className={modalHeaderClass}>
           <div>
-            <span className="modal__eyebrow">不可变制品</span>
-            <h2>发布稳定版本</h2>
+            <span className={modalEyebrowClass}>不可变制品</span>
+            <h2 className={modalTitleClass}>发布稳定版本</h2>
           </div>
           <button
-            className="icon-button"
+            className={iconButtonClass}
             type="button"
             aria-label="关闭"
             onClick={onClose}
@@ -43,29 +59,43 @@ export function PublishModal({
             <Icon name="close" />
           </button>
         </div>
-        <form onSubmit={onSubmit}>
-          <div className="publish-source">
-            <span className={`file-icon file-icon--${publishTarget.script_type}`}>
+        <form className={modalFormClass} onSubmit={onSubmit}>
+          <div className="mb-[17px] flex items-center gap-2.5 rounded-[7px] border border-[#dce6ef] bg-[#f8fbfd] px-3 py-[11px]">
+            <span
+              className={`grid size-[25px] shrink-0 place-items-center rounded-[5px] ${
+                publishTarget.script_type === "notebook"
+                  ? "bg-[#fff0ed] text-[#e15e50]"
+                  : "bg-[#eaf3ff] text-[#2e73c6]"
+              }`}
+            >
               <Icon name={scriptIcon(publishTarget)} size={18} />
             </span>
-            <span>
-              <strong>{publishTarget.script_name}</strong>
-              <small>当前 Workspace 工作副本</small>
+            <span className="flex min-w-0 flex-col gap-0.5">
+              <strong className="truncate text-xs text-[#34485d]">
+                {publishTarget.script_name}
+              </strong>
+              <small className="text-[9px] text-[#8b99a8]">
+                当前 Workspace 工作副本
+              </small>
             </span>
           </div>
-          <label className="form-field">
+          <label className={formFieldClass}>
             <span>发布说明</span>
             <textarea
+              className={formTextareaClass}
               maxLength={1000}
               placeholder="例如：完成数据清洗和特征工程"
               value={releaseNote}
               onChange={(event) => onReleaseNoteChange(event.target.value)}
             />
-            <small>稳定版本内容不可修改，可作为后续调度节点输入。</small>
+            <small className={formHintClass}>
+              稳定版本内容不可修改，可作为后续调度节点输入。
+            </small>
           </label>
-          <label className="form-field">
+          <label className={formFieldClass}>
             <span>可见范围</span>
             <select
+              className={formInputClass}
               value={publishVisibility}
               onChange={(event) =>
                 onPublishVisibilityChange(event.target.value as Visibility)}
@@ -75,16 +105,16 @@ export function PublishModal({
               <option value="public">公开</option>
             </select>
           </label>
-          <div className="modal__footer">
+          <div className={modalFooterClass}>
             <button
-              className="secondary-button"
+              className={secondaryButtonClass}
               type="button"
               onClick={onClose}
             >
               取消
             </button>
             <button
-              className="primary-button"
+              className={primaryButtonClass}
               type="submit"
               disabled={publishing}
             >
diff --git a/frontend/app/features/platform/PythonEditor.tsx b/frontend/app/features/platform/PythonEditor.tsx
index 7abe918..e6746d6 100644
--- a/frontend/app/features/platform/PythonEditor.tsx
+++ b/frontend/app/features/platform/PythonEditor.tsx
@@ -67,13 +67,18 @@ export function PythonEditor({
 
   if (loading) {
     return (
-      <div className="python-editor" ref={containerRef}>
-        <section className="editor-opening-state" aria-live="polite" style={{ display: "block" }}>
-          <div className="editor-opening-state__icon">
-            <span className="button-spinner button-spinner--blue" />
+      <div className="flex h-full min-h-0 flex-col bg-white" ref={containerRef}>
+        <section
+          className="mx-auto my-16 flex w-[min(520px,calc(100%-48px))] min-h-[260px] flex-col items-center justify-center rounded-[10px] border border-[#dce5ed] bg-white/95 p-9 text-center text-[#66788d] shadow-[0_12px_34px_rgb(31_64_98/7%)]"
+          aria-live="polite"
+        >
+          <div className="mb-4 grid size-[54px] place-items-center rounded-full bg-[#edf6ff] text-[#247bc5]">
+            <span className="button-spinner button-spinner--blue size-6 border-[3px]" />
           </div>
-          <strong>正在打开 Python 编辑器</strong>
-          <p>正在加载文件内容…</p>
+          <strong className="text-base text-[#1d344d]">正在打开 Python 编辑器</strong>
+          <p className="mt-[9px] max-w-[430px] text-xs leading-[1.7] text-[#7a8a9b]">
+            正在加载文件内容…
+          </p>
         </section>
       </div>
     );
@@ -81,28 +86,38 @@ export function PythonEditor({
 
   if (loadError) {
     return (
-      <div className="python-editor" ref={containerRef}>
-        <section className="editor-opening-state has-error" aria-live="polite" style={{ display: "block" }}>
-          <div className="editor-opening-state__icon">
+      <div className="flex h-full min-h-0 flex-col bg-white" ref={containerRef}>
+        <section
+          className="mx-auto my-16 flex w-[min(520px,calc(100%-48px))] min-h-[260px] flex-col items-center justify-center rounded-[10px] border border-[#f0cfcc] bg-white/95 p-9 text-center text-[#66788d] shadow-[0_12px_34px_rgb(31_64_98/7%)]"
+          aria-live="polite"
+        >
+          <div className="mb-4 grid size-[54px] place-items-center rounded-full bg-[#fff1f0] text-[#c84f49]">
             <Icon name="info" size={28} />
           </div>
-          <strong>Python 编辑器打开失败</strong>
-          <p>{loadError}</p>
+          <strong className="text-base text-[#1d344d]">Python 编辑器打开失败</strong>
+          <p className="mt-[9px] max-w-[430px] text-xs leading-[1.7] text-[#7a8a9b] [overflow-wrap:anywhere]">
+            {loadError}
+          </p>
         </section>
       </div>
     );
   }
 
   return (
-    <div className="python-editor" ref={containerRef}>
-      {dirty && <div className="editor-dirty-banner">未保存修改</div>}
-      <div className="python-editor__status">
-        <span>
-          <i /> Workspace Python Editor
+    <div className="flex h-full min-h-0 flex-col bg-white" ref={containerRef}>
+      {dirty && (
+        <div className="flex items-center gap-2 border-b border-[#f0d8a8] bg-[#fff7e6] px-3.5 py-1.5 text-xs font-medium text-[#9b6a18] before:text-[10px] before:text-[#d49b00] before:content-['●']">
+          未保存修改
+        </div>
+      )}
+      <div className="flex items-center gap-4 border-b border-[#e6e8ec] bg-[#f5f7fa] px-3.5 py-1 text-[11px] text-[#6b7280]">
+        <span className="inline-flex items-center gap-1.5">
+          <i className="size-1.5 rounded-full bg-[#20b77d]" />
+          Workspace Python Editor
         </span>
         <span>{script.relative_path}</span>
       </div>
-      <div className="python-editor__canvas">
+      <div className="relative min-h-0 flex-1 overflow-hidden">
         <Editor
           height="100%"
           language="python"
diff --git a/frontend/app/features/platform/ScriptExplorer.tsx b/frontend/app/features/platform/ScriptExplorer.tsx
index d3957f1..845a652 100644
--- a/frontend/app/features/platform/ScriptExplorer.tsx
+++ b/frontend/app/features/platform/ScriptExplorer.tsx
@@ -163,14 +163,14 @@ export function ScriptExplorer({
   }, [filteredScripts, directories, user, dataByOwner, members]);
 
   return (
-    <aside className="explorer">
-      <div className="explorer__header">
+    <aside className="flex min-h-0 flex-col overflow-hidden rounded-[7px] border border-[#dce4ec] bg-white shadow-[0_2px_7px_rgb(25_46_73/3%)]">
+      <div className="flex min-h-16 items-center justify-between border-b border-[#e8edf2] px-3.5">
         <div>
-          <h2>脚本目录</h2>
+          <h2 className="mb-0.5 text-base text-[#1d2d42]">脚本目录</h2>
         </div>
-        <div className="explorer__actions">
+        <div className="flex items-center gap-[9px]">
           <button
-            className="text-button"
+            className="inline-flex cursor-pointer items-center gap-0.5 border-0 bg-transparent px-px py-[5px] text-xs font-semibold text-[#1474d4] hover:text-[#0d58a2] disabled:cursor-wait disabled:opacity-55"
             type="button"
             disabled={uploading}
             onClick={onUpload}
@@ -180,14 +180,14 @@ export function ScriptExplorer({
           </button>
           <input
             ref={uploadInputRef}
-            className="visually-hidden"
+            className="sr-only"
             type="file"
             accept=".py,.ipynb,.csv,.xlsx,.xls,.tsv,.json,.parquet,.txt"
             multiple
             onChange={onHandleUpload}
           />
           <button
-            className="text-button"
+            className="inline-flex cursor-pointer items-center gap-0.5 border-0 bg-transparent px-px py-[5px] text-xs font-semibold text-[#1474d4] hover:text-[#0d58a2]"
             type="button"
             onClick={() => onOpenCreateDialog()}
           >
@@ -197,28 +197,34 @@ export function ScriptExplorer({
         </div>
       </div>
 
-      <div className="search-box">
+      <div className="mx-3 mt-[11px] mb-[7px] flex h-[38px] items-center gap-[7px] rounded-md border border-[#dce5ed] bg-[#fbfcfd] px-[9px] text-[#95a2b1] focus-within:border-[#6aa9e9] focus-within:shadow-[0_0_0_3px_rgb(31_119_207/8%)]">
         <Icon name="search" size={17} />
         <input
+          className="min-w-0 flex-1 border-0 bg-transparent text-xs text-[#26384d] outline-none placeholder:text-[#a7b2bf]"
           aria-label="搜索脚本"
           placeholder="搜索脚本名称"
           value={keyword}
           onChange={(event) => onKeywordChange(event.target.value)}
         />
         <button
-          className={refreshing ? "is-spinning" : ""}
+          className="grid size-6 place-items-center border-0 bg-transparent text-[#8d9aaa]"
           type="button"
           aria-label="刷新脚本"
           onClick={onRefresh}
         >
-          <Icon name="refresh" size={16} />
+          <span className={refreshing ? "inline-flex animate-spin" : "inline-flex"}>
+            <Icon name="refresh" size={16} />
+          </span>
         </button>
       </div>
 
-      <div className="tree-scroll">
+      <div className="min-h-0 flex-1 overflow-y-auto px-[7px] pb-3.5 pt-[5px]">
         {loading ? (
-          <div className="tree-skeleton">
-            <span /><span /><span /><span />
+          <div className="flex flex-col gap-2 px-2 py-[15px]">
+            <span className="tree-skeleton-bar h-[43px] rounded-md" />
+            <span className="tree-skeleton-bar h-[43px] rounded-md" />
+            <span className="tree-skeleton-bar h-[43px] rounded-md" />
+            <span className="tree-skeleton-bar h-[43px] rounded-md" />
           </div>
         ) : (
           <>
@@ -249,18 +255,24 @@ export function ScriptExplorer({
               );
             })}
             {filteredScripts.length === 0 && directories.length === 0 && (
-              <div className="tree-empty">
-                <span className="tree-empty__icon">
+              <div className="flex flex-col items-center px-[18px] py-[34px] text-center text-[#97a4b4]">
+                <span className="mb-3 grid size-[46px] place-items-center rounded-[13px] bg-[#eff6fd] text-[#6796c5]">
                   <Icon name="script" size={24} />
                 </span>
-                <strong>{keyword ? "没有匹配脚本" : "还没有构建脚本"}</strong>
-                <p>
+                <strong className="text-xs text-[#637286]">
+                  {keyword ? "没有匹配脚本" : "还没有构建脚本"}
+                </strong>
+                <p className="mb-3.5 mt-1.5 text-[10px] leading-normal">
                   {keyword
                     ? "换个关键词试试"
                     : "新建 Notebook 或 Python 脚本开始实验"}
                 </p>
                 {!keyword && (
-                  <button type="button" onClick={() => onOpenCreateDialog()}>
+                  <button
+                    type="button"
+                    className="inline-flex cursor-pointer items-center gap-1 rounded-md border border-[#bcd6ee] bg-white px-[11px] py-[7px] text-[11px] text-[#176cc1]"
+                    onClick={() => onOpenCreateDialog()}
+                  >
                     <Icon name="plus" size={15} />
                     新建脚本
                   </button>
diff --git a/frontend/app/features/platform/ScriptWorkspace.tsx b/frontend/app/features/platform/ScriptWorkspace.tsx
index eac3b86..87ec5f4 100644
--- a/frontend/app/features/platform/ScriptWorkspace.tsx
+++ b/frontend/app/features/platform/ScriptWorkspace.tsx
@@ -15,6 +15,30 @@ import { useAuth } from "../../context/AuthContext";
 import { getScriptContent } from "../../services/api";
 import {PythonEditor} from "~/features/platform/PythonEditor";
 
+function fileIconTone(type: ScriptType | "data") {
+  if (type === "notebook") return "text-[#e15e50] bg-[#fff0ed]";
+  if (type === "data") return "text-[#5a8f6a] bg-[#eef8f1]";
+  return "text-[#2e73c6] bg-[#eaf3ff]";
+}
+
+const toolbarBtnClass =
+  "h-[31px] cursor-pointer rounded-[5px] border border-[#d9e3ec] bg-white px-[11px] text-[11px] text-[#52708d] hover:border-[#9dbbd8] hover:bg-[#f7fbff] disabled:cursor-wait disabled:opacity-70";
+
+const endEditBtnClass =
+  "h-[31px] cursor-pointer rounded-[5px] border border-[#e1b8b8] bg-[#fff8f8] px-[11px] text-[11px] text-[#a34c4c] hover:border-[#9dbbd8] hover:bg-[#f7fbff] disabled:cursor-wait disabled:opacity-70";
+
+const releaseBtnClass =
+  "h-[31px] cursor-pointer rounded-[5px] border border-[#e7c689] bg-[#fffbf3] px-[11px] text-[11px] text-[#9b6a18] hover:border-[#9dbbd8] hover:bg-[#f7fbff]";
+
+const openEditorBtnClass =
+  "inline-flex h-[37px] cursor-pointer items-center justify-center gap-[7px] rounded-md border border-[#b9d4ef] bg-[#f4f9ff] px-3.5 text-[11px] font-[650] text-[#176cc0] hover:border-[#7eafe0] hover:bg-[#eaf4ff] disabled:cursor-wait disabled:opacity-70";
+
+const openEditorEditingBtnClass =
+  "inline-flex h-[37px] cursor-pointer items-center justify-center gap-[7px] rounded-md border border-[#69b79a] bg-[#effaf5] px-3.5 text-[11px] font-[650] text-[#137a55] hover:border-[#7eafe0] hover:bg-[#eaf4ff] disabled:cursor-wait disabled:opacity-70";
+
+const saveBtnClass =
+  "inline-flex h-[31px] cursor-pointer items-center justify-center gap-1.5 rounded-[5px] border border-[#b8dec1] bg-[#f1faf3] px-[11px] text-[11px] font-semibold text-[#1f6d3a] disabled:cursor-not-allowed disabled:opacity-50";
+
 // 模块级变量存储刷新版本号，用于检测只读内容刷新
 let _lastRefreshVersion = 0;
 
@@ -101,7 +125,7 @@ function NotebookViewer({ content }: { content: object }) {
   const cells = notebook.cells ?? [];
 
   return (
-    <div className="notebook-read-only">
+    <div className="flex h-full flex-col overflow-y-auto bg-white">
       {cells.map((cell, index) => {
         const sourceText = Array.isArray(cell.source)
           ? cell.source.join("")
@@ -109,8 +133,8 @@ function NotebookViewer({ content }: { content: object }) {
 
         if (cell.cell_type === "markdown") {
           return (
-            <div key={index} className="notebook-cell notebook-cell--markdown">
-              <div className="notebook-cell__content">
+            <div key={index} className="flex w-full shrink-0 px-6 py-1">
+              <div className="notebook-md flex min-w-0 flex-1 flex-col">
                 {renderMarkdown(sourceText)}
               </div>
             </div>
@@ -120,36 +144,50 @@ function NotebookViewer({ content }: { content: object }) {
         if (cell.cell_type === "code") {
           const hasSource = sourceText.trim().length > 0;
           return (
-            <div key={index} className="notebook-cell notebook-cell--code">
-              <div className="notebook-cell__prompt">
+            <div key={index} className="flex w-full min-h-11 shrink-0 py-2">
+              <div className="w-[90px] shrink-0 select-none px-4 text-right font-mono text-[11px] leading-[1.6] text-[#8b949e]">
                 In [{cell.execution_count ?? " "}]:
               </div>
-              <div className="notebook-cell__content">
-                <div className={`notebook-cell__input${!hasSource ? ' notebook-cell__input--empty' : ''}`}>
-                  <pre><code>{sourceText}</code></pre>
+              <div className="flex min-w-0 flex-1 flex-col">
+                <div
+                  className={`mr-3.5 min-h-6 rounded-[1px] border border-[#ccc] bg-[#f6f8fa] ${
+                    hasSource ? "p-1.5" : "flex items-center px-3.5"
+                  }`}
+                >
+                  <pre className="m-0 bg-transparent font-mono text-[13px] leading-normal break-words whitespace-pre-wrap text-[#24292f]">
+                    <code className="bg-transparent font-mono text-[13px]">{sourceText}</code>
+                  </pre>
                 </div>
                 {cell.outputs && cell.outputs.length > 0 && (
-                  <div className="notebook-cell__outputs">
+                  <div className="mt-2">
                     {cell.outputs.map((output, outputIndex) => {
-                      // 处理 stream 类型的输出
                       if (output.output_type === "stream" && output.text) {
                         const text = Array.isArray(output.text)
                           ? output.text.join("")
                           : output.text;
                         return (
-                          <div key={outputIndex} className={`notebook-output notebook-output--${output.name}`}>
-                            <pre>{text}</pre>
+                          <div
+                            key={outputIndex}
+                            className="px-1.5 text-[13px] leading-normal text-[#24292f]"
+                          >
+                            <pre className="m-0 font-mono text-[13px] break-words whitespace-pre-wrap">
+                              {text}
+                            </pre>
                           </div>
                         );
                       }
-                      // 处理 execute_result / display_data 类型
                       if (output.output_type === "execute_result" || output.output_type === "display_data") {
                         const text = output.data?.["text/plain"];
                         if (text) {
                           const textStr = Array.isArray(text) ? text.join("") : String(text);
                           return (
-                            <div key={outputIndex} className="notebook-output">
-                              <pre>{textStr}</pre>
+                            <div
+                              key={outputIndex}
+                              className="px-1.5 text-[13px] leading-normal text-[#24292f]"
+                            >
+                              <pre className="m-0 font-mono text-[13px] break-words whitespace-pre-wrap">
+                                {textStr}
+                              </pre>
                             </div>
                           );
                         }
@@ -309,7 +347,7 @@ export function ScriptWorkspace({
   useLayoutEffect(() => {
     const tabbar = tabbarRef.current;
     if (!tabbar) return;
-    const activeTab = tabbar.querySelector(".editor-tab--active") as HTMLElement | null;
+    const activeTab = tabbar.querySelector('[data-active="true"]') as HTMLElement | null;
     if (activeTab) {
       const tabbarRect = tabbar.getBoundingClientRect();
       const tabRect = activeTab.getBoundingClientRect();
@@ -365,37 +403,54 @@ export function ScriptWorkspace({
 
   return (
     <>
-      <div className="tabbar">
+      <div className="relative flex h-[43px] min-h-[43px] items-stretch overflow-hidden border-b border-[#e5ebf1] bg-[#f7f9fb]">
         <button
-          className="tabbar-scroll-btn tabbar-scroll-btn--left"
+          className="z-[1] grid w-7 shrink-0 rotate-180 cursor-pointer place-items-center border-0 border-r border-[#e4eaf0] bg-[#f7f9fb] text-[#6b7c8f] transition-colors duration-150 hover:bg-[#edf1f5] hover:text-[#3d4c5c]"
           type="button"
           aria-label="向左滚动"
           onClick={() => scroll("left")}
         >
           <Icon name="chevron" size={16} />
         </button>
-        <div className="tabbar-scroll-content" ref={tabbarRef}>
-          {openTabs.map((tab) => (
-            <div
-              key={tab.scriptId}
-              className={`editor-tab${tab.scriptId === script.script_id ? " editor-tab--active" : ""}`}
-              onClick={() => onSwitchTab(tab.scriptId)}
-            >
-              <span className={`file-icon file-icon--${tab.scriptType}`}>
-                <Icon name={tab.scriptType === "notebook" ? "notebook" : "python"} size={16} />
-              </span>
-              <span>{tab.scriptName}</span>
-              <button
-                type="button"
-                aria-label="关闭标签"
-                onClick={(event) => onClose(tab.scriptId, event)}
+        <div
+          className="tabbar-scroll flex flex-1 overflow-x-auto overflow-y-hidden scroll-smooth"
+          ref={tabbarRef}
+        >
+          {openTabs.map((tab) => {
+            const isActive = tab.scriptId === script.script_id;
+            return (
+              <div
+                key={tab.scriptId}
+                data-active={isActive ? "true" : undefined}
+                className={`relative flex max-w-[290px] min-w-[100px] shrink-0 cursor-pointer items-center gap-1.5 border-r border-[#e4eaf0] px-1.5 text-xs text-[#4b5c70] ${
+                  isActive
+                    ? "bg-white before:absolute before:inset-x-0 before:top-0 before:h-0.5 before:bg-[#2381e5] before:content-['']"
+                    : "bg-white hover:bg-[#f0f4f8]"
+                }`}
+                onClick={() => onSwitchTab(tab.scriptId)}
               >
-                <Icon name="close" size={14} />
-              </button>
-            </div>
-          ))}
+                <span
+                  className={`grid size-[25px] shrink-0 place-items-center rounded-[5px] ${fileIconTone(tab.scriptType)}`}
+                >
+                  <Icon
+                    name={tab.scriptType === "notebook" ? "notebook" : "python"}
+                    size={16}
+                  />
+                </span>
+                <span className="min-w-0 flex-1 truncate">{tab.scriptName}</span>
+                <button
+                  type="button"
+                  className="grid size-[25px] place-items-center border-0 bg-transparent text-[#8e9baa] hover:bg-[#edf1f5] hover:text-[#43566c]"
+                  aria-label="关闭标签"
+                  onClick={(event) => onClose(tab.scriptId, event)}
+                >
+                  <Icon name="close" size={14} />
+                </button>
+              </div>
+            );
+          })}
           <button
-            className="new-tab"
+            className="ml-[5px] grid size-[25px] shrink-0 cursor-pointer place-items-center self-center rounded border-0 bg-transparent text-[#8e9baa] hover:bg-[#edf1f5] hover:text-[#43566c]"
             type="button"
             onClick={onNewTab}
           >
@@ -403,7 +458,7 @@ export function ScriptWorkspace({
           </button>
         </div>
         <button
-          className="tabbar-scroll-btn tabbar-scroll-btn--right"
+          className="z-[1] grid w-7 shrink-0 cursor-pointer place-items-center border-0 border-l border-[#e4eaf0] bg-[#f7f9fb] text-[#6b7c8f] transition-colors duration-150 hover:bg-[#edf1f5] hover:text-[#3d4c5c]"
           type="button"
           aria-label="向右滚动"
           onClick={() => scroll("right")}
@@ -412,36 +467,46 @@ export function ScriptWorkspace({
         </button>
       </div>
 
-      <div className="editor-toolbar">
-        <div className="editor-toolbar__path">
-          <span className={`file-icon file-icon--${script.script_type}`}>
+      <div className="flex min-h-[53px] items-center justify-between border-b border-[#e6ebf0] bg-white px-3.5">
+        <div className="flex min-w-0 items-center gap-[7px] text-[11px] text-[#8794a3]">
+          <span
+            className={`grid size-[25px] shrink-0 place-items-center rounded-[5px] ${fileIconTone(script.script_type)}`}
+          >
             <Icon name={scriptIcon(script)} size={17} />
           </span>
           <span>工作副本</span>
           <Icon name="chevron" size={13} />
-          <strong>{script.script_name}</strong>
+          <strong className="max-w-[300px] truncate text-[#45576b]">
+            {script.script_name}
+          </strong>
         </div>
         {!isReadOnlyMode && (
-          <div className="editor-toolbar__actions">
+          <div className="flex items-center gap-[7px]">
             {isPythonEditing ? (
               <>
                 {showSaveButton && (
                   <button
                     type="button"
-                    className={`editor-save-button${activePythonBuf?.saving ? " is-saving" : ""}`}
+                    className={`${saveBtnClass}${activePythonBuf?.saving ? " opacity-85" : ""}`}
                     disabled={saveDisabled}
                     onClick={() => onSavePythonEditor(script.script_id)}
                   >
                     {activePythonBuf?.saving
-                      ? <><span className="button-spinner button-spinner--blue" /> 保存中</>
+                      ? <><span className="button-spinner button-spinner--blue size-3" /> 保存中</>
                       : "保存"}
                   </button>
                 )}
-                <button type="button" className="end-edit-button" onClick={() => onExitPythonEditor(script.script_id)}>结束编辑</button>
+                <button
+                  type="button"
+                  className={endEditBtnClass}
+                  onClick={() => onExitPythonEditor(script.script_id)}
+                >
+                  结束编辑
+                </button>
               </>
             ) : isEditing ? (
               <button
-                className="end-edit-button"
+                className={endEditBtnClass}
                 type="button"
                 disabled={editBusy}
                 onClick={onEndEditing}
@@ -451,6 +516,7 @@ export function ScriptWorkspace({
             ) : (
               <button
                 type="button"
+                className={toolbarBtnClass}
                 onClick={() => onInfo({
                   tone: "info",
                   message: "Jupyter 中保存后会直接写入 Workspace 工作副本",
@@ -460,14 +526,26 @@ export function ScriptWorkspace({
               </button>
             )}
             <button
-              className="release-button"
+              className={releaseBtnClass}
               type="button"
               onClick={onPublish}
             >
               发布稳定版
             </button>
-            <span className={`stage-badge${isEditing ? " is-editing" : ""}`}>
-              <span />
+            <span
+              className={`inline-flex h-[29px] items-center gap-1.5 rounded-[15px] px-2.5 text-[10px] ${
+                isEditing
+                  ? "bg-[#e9f5fd] text-[#126b9d]"
+                  : "bg-[#eaf9f3] text-[#16845c]"
+              }`}
+            >
+              <span
+                className={`size-1.5 rounded-full ${
+                  isEditing
+                    ? "stage-dot-editing bg-[#2495d3]"
+                    : "bg-[#20bc7f]"
+                }`}
+              />
               {
                 latestVersion
                   ? `最新 ${latestVersion.version_label}`
@@ -482,7 +560,7 @@ export function ScriptWorkspace({
           因为 Python 编辑走 pythonEditorBuffers，不走文件锁。
           这个锁只在本浏览器当前 tab 内有效，不能阻止隐身模式 / 其它浏览器同时编辑。 */}
       {isEditing && (
-        <div className="local-lock-banner">
+        <div className="flex shrink-0 items-center justify-center gap-2 border-b border-[#c9def9] bg-[#e7f1ff] px-4 py-1.5 text-xs font-medium text-[#1f4e8a]">
           <Icon name="info" size={14} />
           <span>
             本地编辑锁——关闭标签页、刷新页面或换浏览器后失效，不会阻止他人同时编辑。
@@ -491,25 +569,25 @@ export function ScriptWorkspace({
       )}
 
       {/* 编辑器画布区域 - 始终渲染，保证 iframe 不重新加载 */}
-      <div className="editor-canvas-wrapper" style={{ position: 'relative', width: '100%', height: '100%', overflow: 'hidden' }}>
+      <div className="relative h-full w-full overflow-hidden">
         {/* 只读模式内容 - 用 CSS 控制显示/隐藏 */}
         <div style={{ display: isReadOnlyMode ? 'block' : 'none', height: '100%' }}>
-          <div className="readonly-editor-container">
-            <div className="readonly-editor-banner">
+          <div className="flex h-full flex-col overflow-hidden bg-[#f8f9fa]">
+            <div className="mb-1.5 flex shrink-0 items-center justify-center gap-2 border-b border-[#e0e0e0] bg-[#fff3cd] px-4 py-2 text-[13px] font-medium text-[#856404]">
               <Icon name="lock" size={16} />
               <span>此文件已被锁定，您当前处于只读模式</span>
             </div>
-            <div className="readonly-editor-content">
+            <div className="min-h-0 flex-1 overflow-y-auto">
               {readOnlyLoading ? (
-                <div className="readonly-editor-loading">
+                <div className="flex min-h-[200px] flex-col items-center justify-center gap-4 text-sm text-[#666]">
                   <span className="button-spinner button-spinner--blue" />
                   <span>加载内容中...</span>
                 </div>
               ) : readOnlyError ? (
-                <div className="readonly-editor-error">
+                <div className="flex min-h-[200px] flex-col items-center justify-center gap-3 p-5 text-center text-sm text-[#dc3545]">
                   <Icon name="info" size={28} />
-                  <strong>加载失败</strong>
-                  <p>{readOnlyError}</p>
+                  <strong className="text-base">加载失败</strong>
+                  <p className="m-0 text-[#666]">{readOnlyError}</p>
                 </div>
               ) : script.script_type === 'notebook' && readOnlyContent && typeof readOnlyContent === 'object' ? (
                 <NotebookViewer content={readOnlyContent} />
@@ -536,7 +614,14 @@ export function ScriptWorkspace({
         </div>
 
         {/* 正常编辑模式 - 始终渲染，用 CSS 控制显示/隐藏 */}
-        <div className={`editor-canvas ${sessionCache.size > 0 ? 'is-embedded' : ''}`} style={{ display: isReadOnlyMode ? 'none' : 'block', position: 'relative', minHeight: '0', height: '100%' }}>
+        <div
+          className={`relative min-h-0 flex-1 ${
+            sessionCache.size > 0
+              ? "overflow-hidden bg-white"
+              : "editor-canvas-shell overflow-auto"
+          }`}
+          style={{ display: isReadOnlyMode ? 'none' : 'block', height: '100%' }}
+        >
           {/* 多 PythonEditor 实例：每个有 buffer 的 python tab 都挂载，仅 active 可见 */}
           {pythonTabBuffers.map((tab) => {
           const tabScript = scripts.find((s) => s.script_id === tab.scriptId);
@@ -546,7 +631,7 @@ export function ScriptWorkspace({
           return (
             <section
               key={tab.scriptId}
-              className="python-editor-mount"
+              className="flex h-full min-h-0 w-full flex-col bg-white"
               style={{
                 position: isActive ? "relative" : "absolute",
                 visibility: isActive ? "visible" : "hidden",
@@ -577,29 +662,27 @@ export function ScriptWorkspace({
             return (
               <section
                 key={scriptId}
-                className="embedded-jupyter"
+                className="flex h-full min-h-0 w-full flex-col overflow-hidden bg-white"
                 style={{
                   position: isActive ? 'relative' : 'absolute',
                   visibility: isActive ? 'visible' : 'hidden',
                   pointerEvents: isActive ? 'auto' : 'none',
-                  width: '100%',
-                  height: '100%',
-                  overflow: 'hidden'
                 }}
               >
-                <div className="embedded-jupyter__status">
-                  <span>
-                    <i />
+                <div className="flex min-h-[34px] items-center gap-[18px] border-b border-[#dfe6ec] bg-[#f8fafc] px-3.5 text-[9px] text-[#718195]">
+                  <span className="inline-flex items-center gap-1.5 font-[650] text-[#197b59]">
+                    <i className="size-[7px] rounded-full bg-[#20b77d] shadow-[0_0_0_3px_rgb(32_183_125/12%)]" />
                     Workspace Jupyter Server
                   </span>
-                  <span>
+                  <span className="inline-flex items-center gap-1.5">
                     {cached.session.session_status === "active" ? "Notebook Session · Python 3 Kernel" : "Jupyter 文本编辑器"}
                   </span>
-                  <code title={cached.session.runtime_id}>
+                  <code className="ml-auto text-[9px] text-[#72859a]" title={cached.session.runtime_id}>
                     Runtime {cached.session.runtime_id.slice(-8)}
                   </code>
                 </div>
                 <iframe
+                  className="min-h-0 w-full flex-1 border-0 bg-white"
                   src={cached.jupyterUrl}
                   title={`${scriptId} Jupyter 编辑器`}
                   allow="clipboard-read; clipboard-write"
@@ -614,26 +697,35 @@ export function ScriptWorkspace({
         {!sessionCache.has(script.script_id) ? (
           isNotebook ? (
             <section
-              className={`editor-opening-state${openError ? " has-error" : ""}`}
+              className={`mx-auto my-16 flex w-[min(520px,calc(100%-48px))] min-h-[260px] flex-col items-center justify-center rounded-[10px] border p-9 text-center text-[#66788d] shadow-[0_12px_34px_rgb(31_64_98/7%)] ${
+                openError
+                  ? "border-[#f0cfcc] bg-white/95"
+                  : "border-[#dce5ed] bg-white/95"
+              }`}
               aria-live="polite"
-              style={{ display: 'block' }}
             >
-              <div className="editor-opening-state__icon">
+              <div
+                className={`mb-4 grid size-[54px] place-items-center rounded-full ${
+                  openError
+                    ? "bg-[#fff1f0] text-[#c84f49]"
+                    : "bg-[#edf6ff] text-[#247bc5]"
+                }`}
+              >
                 {openError
                   ? <Icon name="info" size={28} />
-                  : <span className="button-spinner button-spinner--blue" />}
+                  : <span className="button-spinner button-spinner--blue size-6 border-[3px]" />}
               </div>
-              <strong>
+              <strong className="text-base text-[#1d344d]">
                 {openError ? "Notebook 打开失败" : "正在打开 Notebook"}
               </strong>
-              <p>
+              <p className="mt-[9px] max-w-[430px] text-xs leading-[1.7] text-[#7a8a9b] [overflow-wrap:anywhere]">
                 {openError
                   ? openError
                   : "正在获取编辑锁并连接 Workspace Jupyter Server…"}
               </p>
               {openError && (
                 <button
-                  className="open-editor-button"
+                  className={`${openEditorBtnClass} mt-[18px]`}
                   type="button"
                   disabled={editBusy}
                   onClick={onOpenEditor}
@@ -646,15 +738,25 @@ export function ScriptWorkspace({
               )}
             </section>
           ) : isPython && !activePythonBuf ? (
-            <section className="script-overview">
-            <div className="script-overview__header">
+            <section className="mx-auto mb-[38px] mt-6 w-[min(1020px,calc(100%-48px))] max-xl:w-[calc(100%-30px)]">
+            <div className="flex items-start justify-between gap-5 rounded-t-[9px] border border-[#dce5ed] bg-white px-[26px] py-[23px]">
               <div>
-                <span className="section-kicker">PYTHON SCRIPT</span>
-                <h2>{script.script_name}</h2>
-                <p>{script.relative_path}</p>
+                <span className="text-[9px] font-extrabold tracking-[0.13em] text-[#2b7fca]">
+                  PYTHON SCRIPT
+                </span>
+                <h2 className="mb-1 mt-1.5 text-[22px] text-[#1b2d43]">
+                  {script.script_name}
+                </h2>
+                <p className="m-0 font-mono text-[10px] text-[#8997a6]">
+                  {script.relative_path}
+                </p>
               </div>
               <button
-                className={`open-editor-button${isEditing ? " is-editing" : ""}`}
+                className={
+                  isEditing
+                    ? openEditorEditingBtnClass
+                    : openEditorBtnClass
+                }
                 type="button"
                 disabled={editBusy}
                 onClick={onOpenEditor}
@@ -670,37 +772,42 @@ export function ScriptWorkspace({
               </button>
             </div>
 
-            <div className="metadata-grid">
-                  <div>
-                    <span>脚本类型</span>
-                    <strong>Python</strong>
-                  </div>
-                  <div>
-                    <span>可见范围</span>
-                    <strong>
-                      {script.visibility === "workspace"
-                        ? "Workspace"
-                        : script.visibility === "public" ? "公开" : "私有"}
-                    </strong>
-                  </div>
-                  <div>
-                    <span>文件大小</span>
-                    <strong>{formatBytes(script.size_bytes)}</strong>
-                  </div>
-                  <div>
-                    <span>最近更新</span>
-                    <strong>{formatTime(script.updated_at)}</strong>
-                  </div>
+            <div className="grid grid-cols-4 border-x border-b border-[#dce5ed] bg-[#f9fbfd]">
+              {[
+                ["脚本类型", "Python"],
+                [
+                  "可见范围",
+                  script.visibility === "workspace"
+                    ? "Workspace"
+                    : script.visibility === "public"
+                      ? "公开"
+                      : "私有",
+                ],
+                ["文件大小", formatBytes(script.size_bytes)],
+                ["最近更新", formatTime(script.updated_at)],
+              ].map(([label, value], index) => (
+                <div
+                  key={label}
+                  className={`flex min-h-16 flex-col justify-center px-[21px] ${
+                    index < 3 ? "border-r border-[#e4eaf0]" : ""
+                  }`}
+                >
+                  <span className="text-[10px] text-[#8a9aaa]">{label}</span>
+                  <strong className="text-[13px] text-[#2a3f55]">{value}</strong>
                 </div>
-            <div className="preview-card">
-                  <div className="preview-card__bar">
-                    <div>
-                      <span className="window-dot window-dot--red" />
-                      <span className="window-dot window-dot--yellow" />
-                      <span className="window-dot window-dot--green" />
+              ))}
+            </div>
+            <div className="overflow-hidden rounded-b-[9px] border border-t-0 border-[#dce5ed] bg-white">
+                  <div className="flex items-center justify-between border-b border-[#e8edf3] bg-[#f7f9fb] px-3.5 py-2 text-[11px] text-[#6b7c8f]">
+                    <div className="flex items-center gap-1.5">
+                      <span className="size-2.5 rounded-full bg-[#ef6b62]" />
+                      <span className="size-2.5 rounded-full bg-[#e9b949]" />
+                      <span className="size-2.5 rounded-full bg-[#49b97b]" />
                     </div>
                     <span>Python 预览</span>
-                    <em>{isEditing ? "Jupyter 中可编辑" : "平台只读预览"}</em>
+                    <em className="text-[10px] not-italic text-[#97a4b3]">
+                      {isEditing ? "Jupyter 中可编辑" : "平台只读预览"}
+                    </em>
                   </div>
                   <PythonPreview
                     workspaceId={script.workspace_id}
@@ -708,10 +815,9 @@ export function ScriptWorkspace({
                   />
                 </div>
 
-            <div className="integrity-row">
-              <span>
+            <div className="mt-3 flex flex-wrap items-center gap-x-5 gap-y-2 px-1 text-[11px] text-[#7a8b9c]">
+              <span className="inline-flex items-center gap-[5px] text-[#25875e]">
                 <Icon name="check" size={15} />
-                {/*{isEditing ? "Demo 无锁编辑会话已连接" : "工作副本已同步"}*/}
               </span>
               <span>SHA-256&nbsp; {shortHash(script.content_hash)}</span>
               <span>
diff --git a/frontend/app/features/platform/ScriptsPage.tsx b/frontend/app/features/platform/ScriptsPage.tsx
index 02d6d4a..b0f26e2 100644
--- a/frontend/app/features/platform/ScriptsPage.tsx
+++ b/frontend/app/features/platform/ScriptsPage.tsx
@@ -5,6 +5,7 @@ import { CreateFolderModal } from "./CreateFolderModal";
 import { CreateScriptModal } from "./CreateScriptModal";
 import { DataResourceUploadModal } from "./DataResourceUploadModal";
 import Icon from "../../components/common/Icon";
+import { WelcomePanel } from "../../components/common/WelcomePanel";
 import { PublishModal } from "./PublishModal";
 import { ScriptExplorer } from "./ScriptExplorer";
 import { TreeContextMenu } from "./TreeContextMenu";
@@ -292,7 +293,7 @@ export default function ScriptsPage() {
   };
 
   return (
-    <section className="workspace-layout">
+    <section className="grid min-h-0 flex-1 grid-cols-[310px_minmax(0,1fr)] gap-2.5 p-2.5 max-xl:grid-cols-[285px_minmax(0,1fr)]">
       <ScriptExplorer
         scripts={scripts}
         filteredScripts={filteredScripts}
@@ -318,7 +319,7 @@ export default function ScriptsPage() {
         onHandleUpload={handleUpload}
       />
 
-      <section className="editor-area">
+      <section className="flex min-h-0 flex-col overflow-hidden rounded-[7px] border border-[#dce4ec] bg-white shadow-[0_2px_7px_rgb(25_46_73/3%)]">
         {selected ? (
           <ScriptWorkspace
             script={selected}
@@ -369,20 +370,7 @@ export default function ScriptsPage() {
             onInfo={(t) => pushToast(t)}
           />
         ) : (
-          <div className="welcome-panel">
-            <div className="welcome-panel__visual">
-              <Icon name="script" size={42} />
-            </div>
-            <span className="welcome-panel__label">构建脚本工作台</span>
-            <h2>创建你的第一个模型脚本</h2>
-            <p>
-              通过 Notebook 完成数据探索，或使用 Python 脚本构建可调度的处理任务。
-            </p>
-            <button className="primary-button" onClick={() => openCreateDialog("")}>
-              <Icon name="plus" size={17} />
-              新建构建脚本
-            </button>
-          </div>
+          <WelcomePanel onCreateScript={() => openCreateDialog("")} />
         )}
       </section>
 
diff --git a/frontend/app/features/platform/TreeContextMenu.tsx b/frontend/app/features/platform/TreeContextMenu.tsx
index 75253ea..7aa94d4 100644
--- a/frontend/app/features/platform/TreeContextMenu.tsx
+++ b/frontend/app/features/platform/TreeContextMenu.tsx
@@ -23,6 +23,12 @@ type TreeContextMenuProps = {
   onClose: () => void;
 };
 
+const menuItemClass =
+  "flex h-[34px] cursor-pointer items-center gap-[9px] rounded-[5px] border-0 bg-transparent px-[9px] text-left text-[11px] text-[#34475a] hover:bg-[#eef6fd] hover:text-[#136dbd]";
+
+const dangerItemClass =
+  "flex h-[34px] cursor-pointer items-center gap-[9px] rounded-[5px] border-0 bg-transparent px-[9px] text-left text-[11px] text-[#c74848] hover:bg-[#fff0f0]";
+
 export function TreeContextMenu({
   contextMenu,
   onOpenScript,
@@ -38,19 +44,15 @@ export function TreeContextMenu({
 }: TreeContextMenuProps) {
   if (!contextMenu) return null;
 
-  const width = 188;
-  const height = contextMenu.kind === "file" ? 124 : 190;
   const isDataResource = !!contextMenu.script?.script_id.startsWith("data:");
 
   return (
     <div
-      className="tree-context-menu"
+      className="fixed z-[1000] flex w-[180px] flex-col rounded-lg border border-[#d9e2ea] bg-white p-1.5 shadow-[0_14px_34px_rgb(18_43_68/20%)]"
       role="menu"
       style={{
         left: contextMenu.x,
         top: contextMenu.y,
-        position: "fixed",
-        zIndex: 1000,
       }}
       onPointerDown={(event) => event.stopPropagation()}
     >
@@ -61,6 +63,7 @@ export function TreeContextMenu({
               <button
                 type="button"
                 role="menuitem"
+                className={menuItemClass}
                 onClick={() => {
                   if (onCopyResourcePath) {
                     onCopyResourcePath(contextMenu.script!.relative_path);
@@ -73,7 +76,7 @@ export function TreeContextMenu({
               </button>
               {onRemoveResource && (
                 <button
-                  className="is-danger"
+                  className={dangerItemClass}
                   type="button"
                   role="menuitem"
                   onClick={() => {
@@ -92,6 +95,7 @@ export function TreeContextMenu({
               <button
                 type="button"
                 role="menuitem"
+                className={menuItemClass}
                 onClick={() => {
                   onOpenScript(contextMenu.script!.script_id);
                   onClose();
@@ -103,6 +107,7 @@ export function TreeContextMenu({
               <button
                 type="button"
                 role="menuitem"
+                className={menuItemClass}
                 onClick={() => {
                   onToggleLock(contextMenu.script!);
                   onClose();
@@ -115,7 +120,7 @@ export function TreeContextMenu({
                 {contextMenu.script.is_locked ? "解锁文件" : "锁定文件"}
               </button>
               <button
-                className="is-danger"
+                className={dangerItemClass}
                 type="button"
                 role="menuitem"
                 onClick={() => onRemoveScript(contextMenu.script!)}
@@ -131,6 +136,7 @@ export function TreeContextMenu({
           <button
             type="button"
             role="menuitem"
+            className={menuItemClass}
             onClick={() => onOpenCreateDialog(contextMenu.path, "notebook")}
           >
             <Icon name="notebook" size={16} />
@@ -139,6 +145,7 @@ export function TreeContextMenu({
           <button
             type="button"
             role="menuitem"
+            className={menuItemClass}
             onClick={() => onOpenCreateDialog(contextMenu.path, "python")}
           >
             <Icon name="python" size={16} />
@@ -147,6 +154,7 @@ export function TreeContextMenu({
           <button
             type="button"
             role="menuitem"
+            className={menuItemClass}
             onClick={() => onOpenFolderDialog(contextMenu.path)}
           >
             <Icon name="folder" size={16} />
@@ -155,6 +163,7 @@ export function TreeContextMenu({
           <button
             type="button"
             role="menuitem"
+            className={menuItemClass}
             onClick={() => onChooseUpload(contextMenu.path)}
           >
             <Icon name="upload" size={16} />
@@ -162,9 +171,9 @@ export function TreeContextMenu({
           </button>
           {contextMenu.kind === "directory" && (
             <>
-              <span className="tree-context-menu__separator" />
+              <span className="mx-[3px] my-[5px] h-px bg-[#e7ecf1]" />
               <button
-                className="is-danger"
+                className={dangerItemClass}
                 type="button"
                 role="menuitem"
                 onClick={() => onRemoveDirectory(contextMenu.path)}
diff --git a/frontend/app/features/platform/VersionReceiptModal.tsx b/frontend/app/features/platform/VersionReceiptModal.tsx
index 964946d..5a2bbc0 100644
--- a/frontend/app/features/platform/VersionReceiptModal.tsx
+++ b/frontend/app/features/platform/VersionReceiptModal.tsx
@@ -1,6 +1,12 @@
 import Icon from "../../components/common/Icon";
 import type { StableVersion } from "../../services/api";
 import { copyToClipboard } from "../../lib/clipboard";
+import {
+  modalBackdropClass,
+  modalEyebrowClass,
+  modalPanelClass,
+  primaryButtonClass,
+} from "./modalUi";
 
 type VersionReceiptModalProps = {
   publishedVersion: StableVersion | null;
@@ -16,22 +22,31 @@ export function VersionReceiptModal({
   if (!publishedVersion) return null;
 
   return (
-    <div className="modal-backdrop" role="presentation">
-      <section className="modal version-receipt" role="dialog" aria-modal="true">
-        <div className="version-receipt__check">
+    <div className={modalBackdropClass} role="presentation">
+      <section
+        className={`${modalPanelClass} w-[min(470px,calc(100vw-40px))] px-7 py-[30px] pb-[25px] text-center`}
+        role="dialog"
+        aria-modal="true"
+      >
+        <div className="mx-auto mb-3.5 grid size-[58px] place-items-center rounded-full bg-gradient-to-br from-[#24b67d] to-[#149566] text-white shadow-[0_9px_24px_rgb(25_157_104/25%)]">
           <Icon name="check" size={28} />
         </div>
-        <span className="modal__eyebrow">STABLE VERSION</span>
-        <h2>稳定版本发布成功</h2>
-        <p>
+        <span className={modalEyebrowClass}>STABLE VERSION</span>
+        <h2 className="mb-2 mt-[5px] text-xl text-[#24374a]">
+          稳定版本发布成功
+        </h2>
+        <p className="mx-auto mb-5 max-w-[360px] text-[11px] leading-[1.65] text-[#718093]">
           {publishedVersion.version_label} 已成为不可变制品，
           后续调度将通过 versions_id 引用它。
         </p>
-        <div className="version-id-box">
-          <span>versions_id</span>
-          <code>{publishedVersion.versions_id}</code>
+        <div className="grid grid-cols-[auto_minmax(0,1fr)_auto] items-center gap-[9px] rounded-[7px] border border-[#dce6ee] bg-[#f7fafc] px-3 py-[11px] text-left">
+          <span className="text-[9px] text-[#8795a4]">versions_id</span>
+          <code className="truncate text-[10px] text-[#275271]">
+            {publishedVersion.versions_id}
+          </code>
           <button
             type="button"
+            className="cursor-pointer rounded border border-[#bad3e8] bg-white px-2 py-1 text-[9px] text-[#2475b7]"
             onClick={async () => {
               await copyToClipboard(publishedVersion.versions_id);
               onCopy("versions_id 已复制");
@@ -41,7 +56,7 @@ export function VersionReceiptModal({
           </button>
         </div>
         <button
-          className="primary-button version-receipt__close"
+          className={`${primaryButtonClass} mt-[17px] h-[39px] w-full border-0 bg-[#1976cf] shadow-none`}
           type="button"
           onClick={onClose}
         >
diff --git a/frontend/app/features/platform/WorkspaceTree.tsx b/frontend/app/features/platform/WorkspaceTree.tsx
index 631c12d..25858b1 100644
--- a/frontend/app/features/platform/WorkspaceTree.tsx
+++ b/frontend/app/features/platform/WorkspaceTree.tsx
@@ -143,9 +143,9 @@ export function WorkspaceTreeGroup({
     // eslint-disable-next-line react-hooks/exhaustive-deps
   }, [groupKey]);
   return (
-    <div className="tree-group">
+    <div className="mb-[7px]">
       <button
-        className={`tree-group__title${open ? " is-open" : ""}`}
+        className="flex h-[33px] w-full cursor-pointer items-center gap-1.5 border-0 bg-transparent px-[7px] text-left text-xs font-[650] text-[#43556a] hover:bg-[#f4f8fc]"
         type="button"
         aria-expanded={open}
         onClick={() => onToggle(groupKey, undefined, ownerUserId)}
@@ -153,12 +153,20 @@ export function WorkspaceTreeGroup({
           ? (event) => onContextMenu(event, { kind: "root", path: "" })
           : undefined}
       >
-        <Icon name="chevron" size={14} />
-        <Icon name="folder" size={17} />
+        <span
+          className={`inline-flex text-[#98a5b2] transition-transform duration-150 ease-in-out ${
+            open ? "rotate-90" : ""
+          }`}
+        >
+          <Icon name="chevron" size={14} />
+        </span>
+        <span className="inline-flex text-[#eab434] [&_svg]:fill-[#f7c84a] [&_svg]:stroke-[#e0a828]">
+          <Icon name="folder" size={17} />
+        </span>
         <span>{title}</span>
       </button>
       {open && (
-        <div className="tree-group__items">
+        <div className="flex flex-col gap-0.5 pl-[13px]">
           <WorkspaceTreeItems
             groupKey={groupKey}
             ownerUserId={ownerUserId}
@@ -180,7 +188,7 @@ export function WorkspaceTreeGroup({
             onCopyResourcePath={onCopyResourcePath}
           />
           {scripts.length === 0 && directories.length === 0 && dataResourceScripts.length === 0 && (
-            <p className="tree-group__empty">
+            <p className="mb-[7px] ml-[35px] mt-0.5 text-[11px] text-[#a5b0bc]">
               {readOnly ? "暂无文件" : "右键此目录即可新建或上传"}
             </p>
           )}
@@ -231,48 +239,67 @@ function WorkspaceTreeItems({
           onCopyResourcePath={onCopyResourcePath}
         />
       ))}
-      {childScripts.map((item) => (
-        <button
-          className={`script-row${
-            selectedId === item.script_id ? " script-row--active" : ""
-          }`}
-          style={{ paddingLeft: 20 + depth * 16 }}
-          key={item.script_id}
-          type="button"
-          onClick={() => {
-            if (item.script_id.startsWith("data:") && onCopyResourcePath) {
-              onCopyResourcePath(item.relative_path);
-            } else {
-              onSelect(item.script_id);
-            }
-          }}
-          onContextMenu={onContextMenu
-            ? (event) => onContextMenu(event, {
-              kind: "file",
-              path: ownedScriptPath(item),
-              script: item,
-            })
-            : undefined}
-        >
-            <span className={`file-icon file-icon--${
-              item.script_id.startsWith("data:") ? "data" : item.script_type
-            }`}>
-              <Icon name={item.script_id.startsWith("data:") ? "database" : scriptIcon(item)} size={17} />
+      {childScripts.map((item) => {
+        const isActive = selectedId === item.script_id;
+        const isData = item.script_id.startsWith("data:");
+        const iconTone = isData
+          ? "text-[#5a8f6a] bg-[#eef8f1]"
+          : item.script_type === "notebook"
+            ? "text-[#e15e50] bg-[#fff0ed]"
+            : "text-[#2e73c6] bg-[#eaf3ff]";
+        return (
+          <button
+            className={`flex h-[47px] w-full cursor-pointer items-center gap-2 rounded-md border pr-[9px] text-left ${
+              isActive
+                ? "border-[#c6ddf4] bg-[#eaf4ff]"
+                : "border-transparent bg-transparent hover:bg-[#f4f7fa]"
+            }`}
+            style={{ paddingLeft: 20 + depth * 16 }}
+            key={item.script_id}
+            type="button"
+            onClick={() => {
+              if (isData && onCopyResourcePath) {
+                onCopyResourcePath(item.relative_path);
+              } else {
+                onSelect(item.script_id);
+              }
+            }}
+            onContextMenu={onContextMenu
+              ? (event) => onContextMenu(event, {
+                kind: "file",
+                path: ownedScriptPath(item),
+                script: item,
+              })
+              : undefined}
+          >
+            <span className={`grid size-[25px] shrink-0 place-items-center rounded-[5px] ${iconTone}`}>
+              <Icon name={isData ? "database" : scriptIcon(item)} size={17} />
             </span>
-            <span className="script-row__copy">
-              <strong title={item.script_name}>{item.script_name}</strong>
-              <small>{formatTime(item.updated_at)}</small>
+            <span className="flex min-w-0 flex-1 flex-col">
+              <strong
+                className="truncate text-xs font-semibold text-[#34475d]"
+                title={item.script_name}
+              >
+                {item.script_name}
+              </strong>
+              <small className="mt-0.5 text-[9px] text-[#9ba8b7]">
+                {formatTime(item.updated_at)}
+              </small>
             </span>
             {item.is_locked && (
-              <span className="lock-badge" title="已锁定">
+              <span className="mr-1 inline-flex items-center justify-center text-[#c79a3a]" title="已锁定">
                 <Icon name="lock" size={12} />
               </span>
             )}
             {item.visibility !== "private" && (
-              <span className="visibility-dot" title="Workspace 可见" />
+              <span
+                className="size-1.5 shrink-0 rounded-full bg-[#1dbd7c] shadow-[0_0_0_3px_rgb(29_189_124/10%)]"
+                title="Workspace 可见"
+              />
             )}
-        </button>
-      ))}
+          </button>
+        );
+      })}
     </>
   );
 }
@@ -298,9 +325,9 @@ function DirectoryBranch({
   const open = expandedPaths.has(expandKey);
   const childrenLoading = loadingChildrenPaths.has(directory.path);
   return (
-    <div className="directory-branch">
+    <div className="flex flex-col">
       <button
-        className="directory-row"
+        className="flex h-8 w-full cursor-pointer items-center gap-1.5 rounded-[5px] border-0 bg-transparent pr-[9px] text-left text-[#45586c] hover:bg-[#f4f7fa]"
         style={{ paddingLeft: 10 + depth * 16 }}
         type="button"
         onClick={() => onToggle(expandKey, directory.path, ownerUserId)}
@@ -311,12 +338,25 @@ function DirectoryBranch({
           })
           : undefined}
       >
-        <span className={`directory-row__chevron${open ? " is-open" : ""}`}>
+        <span
+          className={`grid shrink-0 place-items-center text-[#94a2b1] transition-transform duration-150 ease-in-out ${
+            open ? "rotate-90" : ""
+          }`}
+        >
           <Icon name="chevron" size={13} />
         </span>
-        <Icon name="folder" size={17} />
-        <strong title={directory.path}>{directory.name}</strong>
-        {childrenLoading && <span className="loading-spinner" />}
+        <span className="inline-flex shrink-0 text-[#e2aa27] [&_svg]:fill-[#f7c84a]">
+          <Icon name="folder" size={17} />
+        </span>
+        <strong
+          className="truncate text-[11px] font-[650]"
+          title={directory.path}
+        >
+          {directory.name}
+        </strong>
+        {childrenLoading && (
+          <span className="ml-1 size-3.5 shrink-0 animate-spin rounded-full border-2 border-[#c5d3e0] border-t-[#6a8fb0]" />
+        )}
       </button>
       {open && (
         <WorkspaceTreeItems
diff --git a/frontend/app/features/platform/modalUi.ts b/frontend/app/features/platform/modalUi.ts
new file mode 100644
index 0000000..df39584
--- /dev/null
+++ b/frontend/app/features/platform/modalUi.ts
@@ -0,0 +1,48 @@
+/** Shared Tailwind class strings for platform modals / buttons. */
+
+export const modalBackdropClass =
+  "fixed inset-0 z-20 grid place-items-center bg-[rgb(10_27_45/43%)] backdrop-blur-[2px]";
+
+export const modalPanelClass =
+  "modal-panel w-[min(520px,calc(100vw-40px))] overflow-visible rounded-[11px] border border-[#dce4eb] bg-white shadow-[0_24px_70px_rgb(8_27_48/25%)]";
+
+export const modalCompactClass =
+  "modal-panel flex max-h-[80vh] w-[min(480px,calc(100vw-40px))] flex-col overflow-visible rounded-[11px] border border-[#dce4eb] bg-white shadow-[0_24px_70px_rgb(8_27_48/25%)]";
+
+export const modalHeaderClass =
+  "flex shrink-0 items-center justify-between border-b border-[#e7ecf1] px-[22px] pb-4 pt-5";
+
+export const modalEyebrowClass =
+  "text-[9px] font-extrabold tracking-[0.12em] text-[#2d82d4]";
+
+export const modalTitleClass = "mt-1 text-[19px] text-[#1c2d42]";
+
+export const modalFormClass = "flex-1 overflow-y-auto px-[22px] pt-[19px]";
+
+export const modalFooterClass =
+  "mt-[3px] flex shrink-0 justify-end gap-2 border-t border-[#e8edf2] bg-[#fafbfc] px-[22px] py-3.5 -mx-[22px]";
+
+export const iconButtonClass =
+  "grid size-[34px] cursor-pointer place-items-center rounded-[7px] border border-[#dfe6ed] bg-white hover:border-[#b9c9da] hover:bg-[#f7faff]";
+
+export const primaryButtonClass =
+  "inline-flex min-h-[37px] cursor-pointer items-center justify-center gap-[7px] rounded-md border border-[#126ac3] bg-gradient-to-br from-[#1881e7] to-[#1268c9] px-[15px] text-xs font-[650] text-white shadow-[0_6px_15px_rgb(20_111_202/18%)] hover:from-[#1175d8] hover:to-[#0e5bad] disabled:cursor-not-allowed disabled:opacity-[0.58]";
+
+export const secondaryButtonClass =
+  "inline-flex min-h-[37px] cursor-pointer items-center justify-center gap-[7px] rounded-md border border-[#d8e1e9] bg-white px-[15px] text-xs font-[650] text-[#56687c]";
+
+export const destinationChipClass =
+  "mb-[15px] flex items-center gap-[7px] rounded-md border border-[#dce7ef] bg-[#f7fafc] px-2.5 py-[9px] text-[10px] text-[#587087] [&_svg]:fill-[#f7c84a] [&_svg]:text-[#dda321]";
+
+export const formFieldClass =
+  "mb-[17px] flex flex-col gap-[7px] text-xs font-[650] text-[#3c4e62]";
+
+export const formControlClass =
+  "w-full rounded-md border border-[#d6e0e9] bg-white px-[11px] text-xs text-[#283a4e] outline-none focus:border-[#5b9ddb] focus:shadow-[0_0_0_3px_rgb(38_125_207/8%)]";
+
+export const formInputClass = `${formControlClass} h-[39px]`;
+
+export const formTextareaClass =
+  `${formControlClass} min-h-[92px] resize-y py-2.5 leading-[1.55]`;
+
+export const formHintClass = "text-[9px] font-normal text-[#98a5b3]";
diff --git a/frontend/app/features/schedules/SchedulePage.tsx b/frontend/app/features/schedules/SchedulePage.tsx
index bb656b5..64abd74 100644
--- a/frontend/app/features/schedules/SchedulePage.tsx
+++ b/frontend/app/features/schedules/SchedulePage.tsx
@@ -28,6 +28,19 @@ import {
 } from "~/services/api";
 
 import { useApi, useAuth } from "~/context/AuthContext";
+import {
+  formFieldClass,
+  formInputClass,
+  modalBackdropClass,
+  modalCompactClass,
+  modalEyebrowClass,
+  modalFooterClass,
+  modalFormClass,
+  modalHeaderClass,
+  modalTitleClass,
+  primaryButtonClass,
+  secondaryButtonClass,
+} from "~/features/platform/modalUi";
 import { NodeInspector } from "./NodeInspector";
 import { RunHistory } from "./RunHistory";
 import { ScheduleInspector } from "./ScheduleInspector";
@@ -731,20 +744,22 @@ export default function SchedulePage({
       )}
 
       {createDialogOpen && (
-        <div className="modal-backdrop" role="presentation">
+        <div className={modalBackdropClass} role="presentation">
           <section
-            className="modal modal--compact"
+            className={modalCompactClass}
             role="dialog"
             aria-modal="true"
             aria-labelledby="create-schedule-title"
           >
-            <div className="modal__header">
+            <div className={modalHeaderClass}>
               <div>
-                <span className="modal__eyebrow">SCHEDULE</span>
-                <h2 id="create-schedule-title">新建调度方案</h2>
+                <span className={modalEyebrowClass}>SCHEDULE</span>
+                <h2 id="create-schedule-title" className={modalTitleClass}>
+                  新建调度方案
+                </h2>
               </div>
               <button
-                className="grid h-[34px] w-[34px] cursor-pointer place-items-center rounded-[7px] border border-[#dfe6ed] bg-white hover:border-[#b9c9da] hover:bg-[#f7faff]"
+                className="grid size-[34px] cursor-pointer place-items-center rounded-[7px] border border-[#dfe6ed] bg-white hover:border-[#b9c9da] hover:bg-[#f7faff] disabled:opacity-50"
                 type="button"
                 aria-label="关闭"
                 disabled={Boolean(busy)}
@@ -753,10 +768,11 @@ export default function SchedulePage({
                 <X size={14} />
               </button>
             </div>
-            <form onSubmit={handleCreateScheduleSubmit}>
-              <label className="form-field">
+            <form className={modalFormClass} onSubmit={handleCreateScheduleSubmit}>
+              <label className={formFieldClass}>
                 <span>调度方案名称</span>
                 <input
+                  className={formInputClass}
                   autoFocus
                   maxLength={255}
                   placeholder="请输入调度方案名称"
@@ -765,9 +781,9 @@ export default function SchedulePage({
                   onFocus={(event) => event.currentTarget.select()}
                 />
               </label>
-              <div className="modal__footer">
+              <div className={modalFooterClass}>
                 <button
-                  className="secondary-button"
+                  className={secondaryButtonClass}
                   type="button"
                   disabled={Boolean(busy)}
                   onClick={() => setCreateDialogOpen(false)}
@@ -775,7 +791,7 @@ export default function SchedulePage({
                   取消
                 </button>
                 <button
-                  className="primary-button"
+                  className={primaryButtonClass}
                   type="submit"
                   disabled={Boolean(busy) || !newScheduleName.trim()}
                 >
diff --git a/frontend/app/routes/platform.tsx b/frontend/app/routes/platform.tsx
index b2289a9..25dc30d 100644
--- a/frontend/app/routes/platform.tsx
+++ b/frontend/app/routes/platform.tsx
@@ -18,8 +18,6 @@ import { useUiStore } from "../features/platform/state/uiStore";
 import { bindAdminApi } from "../features/admin/state/adminStore";
 import { bindSchedulesApi } from "../features/schedules/state/useSchedulesStore";
 
-import "../styles/platform.css";
-
 type ActivePage = "home" | "scripts" | "schedules" | "system";
 
 function pageFromPath(pathname: string): ActivePage {
@@ -45,12 +43,9 @@ export default function PlatformLayout() {
   const { currentWorkspace } = useAuth();
   if (!currentWorkspace) {
     return (
-      <div
-        className="app-shell"
-        style={{ display: "flex", alignItems: "center", justifyContent: "center" }}
-      >
-        <div style={{ textAlign: "center" }}>
-          <span style={{ fontSize: 18 }}>加载中…</span>
+      <div className="flex min-h-screen items-center justify-center bg-[#eef2f6]">
+        <div className="text-center">
+          <span className="text-lg">加载中…</span>
         </div>
       </div>
     );
@@ -116,7 +111,7 @@ function AuthenticatedLayout() {
   }, [toast, dismissToast]);
 
   return (
-    <div className="app-shell">
+    <div className="flex min-h-screen bg-[#eef2f6]">
       <Sidebar
         activePage={activePage}
         collapsed={sidebarCollapsed}
@@ -128,7 +123,7 @@ function AuthenticatedLayout() {
         isSystemAdmin={user?.is_system_admin ?? false}
       />
 
-      <main className="main-area">
+      <main className="flex h-screen min-w-0 flex-1 flex-col">
         <Topbar
           activePage={activePage}
           apiOnline={apiOnline}
diff --git a/frontend/app/services/api.ts b/frontend/app/services/api.ts
index 3967acf..252c2e3 100644
--- a/frontend/app/services/api.ts
+++ b/frontend/app/services/api.ts
@@ -158,13 +158,13 @@ export type WorkspaceUpdatePayload = {
   status?: "active" | "archived";
 };
 
+/** 加入工作区；角色继承自用户的 platform_role，请求体不能带 role_code。 */
 export type WorkspaceMemberAddPayload = {
   user_id: string;
-  role_code?: "admin" | "developer";
 };
 
+/** 仅可改成员状态；改角色请 PATCH /platform/employees/{user_id}。 */
 export type WorkspaceMemberUpdatePayload = {
-  role_code?: "admin" | "developer";
   member_status?: "active" | "disabled" | "locked";
 };
 
diff --git a/frontend/app/styles/admin.css b/frontend/app/styles/admin.css
index 436e038..2a4732d 100644
--- a/frontend/app/styles/admin.css
+++ b/frontend/app/styles/admin.css
@@ -1,3 +1,3 @@
-.dashboard-page,.admin-page{height:100%;padding:24px;overflow:auto;background:#f3f6f9}.dashboard-hero{display:flex;align-items:center;justify-content:space-between;padding:34px;border-radius:12px;color:#fff;background:linear-gradient(125deg,#0b3d69,#1978d4);box-shadow:0 12px 30px rgb(19 80 137/18%)}.dashboard-hero span{font-size:10px;letter-spacing:.12em;opacity:.82}.dashboard-hero h2{margin:8px 0 5px;font-size:25px}.dashboard-hero p{margin:0;font-size:12px;opacity:.88}.dashboard-hero__badge{padding:8px 12px;border-radius:20px;background:rgb(255 255 255/16%)}.dashboard-metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:18px}.dashboard-metrics article{display:flex;align-items:center;gap:14px;padding:20px;border:1px solid #e0e8ef;border-radius:9px;background:#fff}.dashboard-metrics svg{color:#1978d4}.dashboard-metrics span{display:flex;flex-direction:column}.dashboard-metrics b{color:#20364c;font-size:21px}.dashboard-metrics small{color:#8796a6}.dashboard-actions{display:flex;gap:12px;margin-top:18px}.dashboard-actions button{display:flex;align-items:center;gap:8px;padding:13px 18px;border:1px solid #d8e4ef;border-radius:7px;color:#346587;background:#fff;cursor:pointer}.admin-page__header{display:flex;align-items:center;justify-content:space-between;margin-bottom:15px;padding:20px 22px;border:1px solid #dee7ef;border-radius:9px;background:#fff}.admin-page__header span{color:#1978d4;font-size:10px;font-weight:800}.admin-page__header h2{margin:4px 0;color:#20364c}.admin-page__header p{margin:0;color:#8a99a8;font-size:11px}.admin-readonly{margin-bottom:12px;padding:10px 13px;border:1px solid #f1d79c;border-radius:6px;color:#8a6416;background:#fff8e8;font-size:11px}.employee-table{overflow:hidden;border:1px solid #dfe7ef;border-radius:9px;background:#fff}.employee-table__head,.employee-row{display:grid;grid-template-columns:1.5fr 1fr .7fr .65fr .8fr;align-items:center;gap:12px;padding:12px 17px}.employee-table__head{color:#748598;background:#f5f8fb;font-size:10px;font-weight:700}.employee-row{min-height:64px;border-top:1px solid #edf1f5;color:#44576a;font-size:11px}.employee-name{display:flex;align-items:center;gap:10px}.employee-name .avatar{display:grid;width:32px;height:32px;place-items:center}.employee-name>span{display:flex;min-width:0;flex-direction:column}.employee-name strong{color:#23384e}.employee-name small{margin-top:3px;color:#93a0ae}.employee-row code{color:#60758b}.role-pill,.status-pill{width:max-content;padding:4px 8px;border-radius:12px}.role-pill{color:#1d6ab3;background:#eaf4ff}.role-pill.is-admin{color:#87580f;background:#fff2d6}.status-pill{color:#138657;background:#e8f8f1}.status-pill.is-disabled,.status-pill.is-locked{color:#a64b4b;background:#ffeded}.employee-actions{display:flex;gap:6px}.employee-actions button{padding:5px 9px;border:1px solid #d9e3ec;border-radius:4px;color:#4c6c88;background:#fff;cursor:pointer}.employee-actions button.is-danger{color:#c14a4a}.employee-actions button:disabled{cursor:not-allowed;opacity:.45}.admin-empty{padding:25px;text-align:center;color:#8796a6}
+.admin-page{height:100%;padding:24px;overflow:auto;background:#f3f6f9}.admin-page__header{display:flex;align-items:center;justify-content:space-between;margin-bottom:15px;padding:20px 22px;border:1px solid #dee7ef;border-radius:9px;background:#fff}.admin-page__header span{color:#1978d4;font-size:10px;font-weight:800}.admin-page__header h2{margin:4px 0;color:#20364c}.admin-page__header p{margin:0;color:#8a99a8;font-size:11px}.admin-readonly{margin-bottom:12px;padding:10px 13px;border:1px solid #f1d79c;border-radius:6px;color:#8a6416;background:#fff8e8;font-size:11px}.employee-table{overflow:hidden;border:1px solid #dfe7ef;border-radius:9px;background:#fff}.employee-table__head,.employee-row{display:grid;grid-template-columns:1.5fr 1fr .7fr .65fr .8fr;align-items:center;gap:12px;padding:12px 17px}.employee-table__head{color:#748598;background:#f5f8fb;font-size:10px;font-weight:700}.employee-row{min-height:64px;border-top:1px solid #edf1f5;color:#44576a;font-size:11px}.employee-name{display:flex;align-items:center;gap:10px}.employee-name .avatar{display:grid;width:32px;height:32px;place-items:center}.employee-name>span{display:flex;min-width:0;flex-direction:column}.employee-name strong{color:#23384e}.employee-name small{margin-top:3px;color:#93a0ae}.employee-row code{color:#60758b}.role-pill,.status-pill{width:max-content;padding:4px 8px;border-radius:12px}.role-pill{color:#1d6ab3;background:#eaf4ff}.role-pill.is-admin{color:#87580f;background:#fff2d6}.status-pill{color:#138657;background:#e8f8f1}.status-pill.is-disabled,.status-pill.is-locked{color:#a64b4b;background:#ffeded}.employee-actions{display:flex;gap:6px}.employee-actions button{padding:5px 9px;border:1px solid #d9e3ec;border-radius:4px;color:#4c6c88;background:#fff;cursor:pointer}.employee-actions button.is-danger{color:#c14a4a}.employee-actions button:disabled{cursor:not-allowed;opacity:.45}.admin-empty{padding:25px;text-align:center;color:#8796a6}
 
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diff --git a/frontend/app/styles/dashboard.css b/frontend/app/styles/dashboard.css
deleted file mode 100644
index 8331a96..0000000
--- a/frontend/app/styles/dashboard.css
+++ /dev/null
@@ -1,185 +0,0 @@
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diff --git a/frontend/app/styles/platform.css b/frontend/app/styles/platform.css
deleted file mode 100644
index 0d886af..0000000
--- a/frontend/app/styles/platform.css
+++ /dev/null
@@ -1,2292 +0,0 @@
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