style: 统一实训页面步骤导航与卡片样式，完成墨黑主题升级

1. 重构全局步骤导航样式，替换旧蓝色主题为墨黑极简风格
2. 统一三个业务页面的步骤标签样式：调整flex布局、内边距和文字换行规则
3. 重写TrainingTaskBrief组件样式，替换为新的task-header内联实训头部设计
4. 更新全局实训主题scss变量与样式规则，统一按钮、边框、配色规范

.trae/skills/ink-training-theme/SKILL.md

@@ -180,13 +180,16 @@ scoped 里写的墨黑按钮永远不生效。**这不是"页面打补丁"能解
    定位 `student-training.scss` 和子组件中的旧蓝色规则；按「全局 !important
    覆盖机制」一节的模板替换成墨黑极简（**只做一次，后续页面自动继承**）。
 1. 读目标页，确认根类（如 `.xxx-page.student-training-shell`）和现有 DOM。
-2. 在页面 scoped 样式的根类块内定义全部令牌（见下），让所有
+2. **搭建页面头部**：按「页面头部：task-header + 内联 task-brief」一节
+   替换旧 `<TrainingTaskBrief>` 组件为内联 `task-brief`，确保有
+   `task-head-main` 包裹层和 `briefOpen` ref。
+3. 在页面 scoped 样式的根类块内定义全部令牌（见下），让所有
    `var(--student-*)` 规则自动重着色，不要逐处打补丁。
-3. 新增一个非 scoped `<style lang="scss">` 块，选择器全部以页面根类为锚：
+4. 新增一个非 scoped `<style lang="scss">` 块，选择器全部以页面根类为锚：
    - 覆盖祖先 `app-main` 画布背景（scoped 触及不到祖先）；
    - 重写步骤导航（全局规则带 `!important`，scoped 无法取胜，见步骤导航一节）。
-4. 按按钮四级层级、字号梯度、间距规则逐区收紧。
-5. 完成后用 GetDiagnostics 校验，并全文搜索蓝色旧值确认无残留。
+5. 按按钮四级层级、字号梯度、间距规则逐区收紧。
+6. 完成后用 GetDiagnostics 校验，并全文搜索蓝色旧值确认无残留。
 
 ## 颜色令牌
 
@@ -246,6 +249,145 @@ scoped 里写的墨黑按钮永远不生效。**这不是"页面打补丁"能解
 标题区三级关系：上方灰色宽字距小标签（11px，`#6b7280`，letter-spacing 0.12em，
 无底色胶囊）→ 黑色步骤标题 → 灰色说明文字。禁止再用实底色 "STEP 01" 胶囊。
 
+## 页面头部：task-header + 内联 task-brief
+
+每个实训页的头部是一个独立白卡片（`.task-header`），包含 badge + 标题 + 一行
+实训背景（可展开目标与要求），右侧可选工具栏按钮。**必须内联实现，禁止使用
+`TrainingTaskBrief.vue` 组件**——该组件是旧蓝 tab 切换风，与墨黑极简不兼容。
+
+### 标准 DOM 结构
+
+```html
+<section class="task-header">
+  <div class="task-head-main">
+    <span class="task-badge"><el-icon><DataAnalysis /></el-icon> 核心实训 · 市场洞察与需求分析</span>
+    <h1 class="task-title">{{ taskTitle }}</h1>
+    <p class="task-brief">
+      <span class="task-brief-text">{{ taskBackground }}</span>
+      <button type="button" class="task-brief-toggle" @click="briefOpen = !briefOpen">
+        {{ briefOpen ? "收起" : "展开目标与要求" }}
+      </button>
+      <span v-if="briefOpen" class="task-brief-more">
+        <b>实训目标</b>
+        <ul><li v-for="goal in taskGoals" :key="goal">{{ goal }}</li></ul>
+        <b>实训要求</b>
+        <p>{{ taskRequirement }}</p>
+      </span>
+    </p>
+  </div>
+  <!-- 右侧工具栏（可选，二选一） -->
+  <TrainingTaskToolbar class="xxx-toolbar" :task-key="TASK_KEY" ... />
+  <!-- 或 -->
+  <div class="xxx-toolbar">
+    <TrainingMaterialButton :material-name="..." :material-url="..." />
+    <button type="button" class="outline-action" @click="exportOutcome">导出实训成果</button>
+  </div>
+</section>
+```
+
+### Script 必备变量
+
+```js
+const briefOpen = ref(false);
+const taskTitle = computed(() => taskConfig.value?.taskName || "页面默认标题");
+const taskBackground = computed(() => taskConfig.value?.background || defaultBackground);
+const taskGoals = computed(() => parseArray(taskConfig.value?.objectives, defaultGoals));
+const taskRequirement = computed(() => taskConfig.value?.requirements || defaultRequirement);
+```
+
+### Scoped 样式（直接照抄）
+
+```scss
+.task-header {
+  display: flex;
+  align-items: flex-start;
+  justify-content: space-between;
+  gap: 12px;
+  margin: 0;
+  padding: 16px;
+  border: 1px solid #e7e9ed;
+  border-radius: 16px;
+  background: #ffffff;
+}
+
+.task-head-main {
+  display: grid;
+  justify-items: start;
+  gap: 8px;
+  min-width: 0;
+  flex: 1 1 auto;
+}
+
+.task-badge {
+  display: inline-flex;
+  align-items: center;
+  gap: 7px;
+  padding: 4px 12px;
+  border: 1px solid var(--student-panel-border);
+  border-radius: 999px;
+  color: var(--student-accent-deep);
+  background: var(--student-accent-soft);
+  font-size: 12px;
+  font-weight: 700;
+}
+
+.task-title {
+  margin: 0;
+  color: var(--student-text);
+  font-size: var(--student-fs-display);
+  font-weight: 700;
+  line-height: 1.35;
+}
+
+.task-brief {
+  margin: 0;
+  color: var(--student-text-secondary);
+  font-size: 12px;
+  line-height: 1.6;
+}
+
+.task-brief-text {
+  display: -webkit-box;
+  overflow: hidden;
+  -webkit-box-orient: vertical;
+  -webkit-line-clamp: 1;
+}
+
+.task-brief-toggle {
+  padding: 0;
+  border: 0;
+  color: var(--student-accent-deep);
+  background: transparent;
+  font: inherit;
+  font-weight: 700;
+  cursor: pointer;
+  &:hover { text-decoration: underline; }
+}
+
+.task-brief-more {
+  display: grid;
+  gap: 6px;
+  margin-top: 8px;
+  padding-top: 8px;
+  border-top: 1px solid var(--student-panel-border);
+  b { color: var(--student-text); font-size: 12px; }
+  ul { display: grid; gap: 4px; margin: 0; padding-left: 18px; }
+  p { margin: 0; }
+}
+```
+
+### 实现要点
+
+1. **`<TrainingTaskBrief>` 组件已弃用**：旧组件是 tab 切换 + 独立卡片的蓝色风，
+   与墨黑极简冲突。直接把实训背景内联在 task-header 里，不要 import 该组件。
+2. **`task-head-main` 必须有**：它是 badge + title + brief 的 grid 容器，
+   `gap: 8px`、`flex: 1 1 auto`，右侧工具栏才不会被挤到下一行。
+3. **`task-brief-text` 单行截断**：`-webkit-line-clamp: 1` 保证默认只显示
+   一行背景摘要，点击按钮展开全部目标和要求。
+4. **右侧工具栏可选**：简单页直接用 `<TrainingTaskToolbar>` 一个组件搞定
+   提交/重置/导出；需要下载案例资料的页用 `<TrainingMaterialButton>` +
+   原生 `<button class="outline-action">` 组合。
+
 ## 步骤导航：按钮切换风
 
 每个步骤是一枚等宽分段按钮：白底灰边、圆角矩形，编号收成左侧小徽章；
@@ -439,6 +581,10 @@ loading 态保持原配色。
 
 ## 子组件换肤要点
 
+- **`TrainingTaskBrief.vue` 已弃用**：旧组件是 tab 切换 + 独立卡片的蓝色风，
+  与墨黑极简完全不兼容。新页面**禁止 import 该组件**，实训背景/目标/要求
+  直接内联在 `.task-header` 里（见「页面头部：task-header + 内联 task-brief」）。
+  旧组件目前仍被 foundation 三页引用，暂不删除，但新页面一律不使用。
 - AI 侧栏面板、气泡、输入框、发送按钮全部中性灰白；其内部 Element Plus
   主色按钮通过覆盖组件内 CSS 变量或 `.el-button--primary` 改墨黑。
 - 工具栏 `TrainingTaskToolbar` / `TrainingMaterialButton` 按「按钮规范 · 位置 B」

src/assets/styles/student-training.scss

@@ -233,18 +233,27 @@
 }
 
 .student-training-shell .flow-steps,
+/* ============================================================
+ * 步骤导航（墨黑极简 · 对齐 foundation new-product-survey）
+ * ============================================================ */
 .student-training-shell .step-indicator {
   display: flex !important;
   flex-wrap: nowrap !important;
-  align-items: center !important;
-  justify-content: space-between !important;
-  gap: 4px !important;
+  align-items: stretch !important;
+  justify-content: flex-start !important;
+  gap: 10px !important;
   width: 100% !important;
-  margin: 0 0 12px !important;
-  padding: 4px !important;
-  border: 1px solid var(--student-panel-border) !important;
-  border-radius: var(--student-radius-pill) !important;
-  background: #f0f6fd !important;
+  max-width: 100% !important;
+  margin: 4px 0 20px !important;
+  padding: 0 !important;
+  border: none !important;
+  border-radius: 0 !important;
+  background: transparent !important;
+  box-shadow: none !important;
+  overflow-x: auto !important;
+  overflow-y: hidden !important;
+  scrollbar-width: thin !important;
+  -webkit-overflow-scrolling: touch !important;
 }
 
 .student-training-shell .flow-arrow {
@@ -253,36 +262,124 @@
 
 .student-training-shell .flow-pill,
 .student-training-shell .step-tab {
-  display: inline-flex !important;
-  flex: 1 1 0 !important;
+  flex: 0 0 auto !important;
+  min-width: auto !important;
+  max-width: none !important;
+  display: flex !important;
+  flex-direction: row !important;
   align-items: center !important;
   justify-content: center !important;
   gap: 8px !important;
-  min-width: 0 !important;
-  width: auto !important;
-  min-height: var(--student-step-height) !important;
-  height: var(--student-step-height) !important;
-  padding: 0 10px !important;
-  border: 1px solid transparent !important;
-  border-radius: var(--student-radius-pill) !important;
-  color: #5a7a9a !important;
-  background: transparent !important;
+  height: auto !important;
+  min-height: 42px !important;
+  margin: 0 !important;
+  padding: 8px 14px !important;
+  border: 1px solid #e5e7eb !important;
+  border-radius: 8px !important;
+  background: #ffffff !important;
   box-shadow: none !important;
-  font-size: var(--student-step-font) !important;
-  font-weight: 800 !important;
-  line-height: 1.2 !important;
+  color: #6b7280 !important;
+  font-size: 13px !important;
+  font-weight: 600 !important;
+  line-height: 1.3 !important;
   letter-spacing: 0 !important;
   white-space: nowrap !important;
+  text-align: center !important;
+  cursor: pointer;
+  transition: background-color .16s ease, color .16s ease, border-color .16s ease !important;
+
+  .step-bar { display: none !important; }
+
+  .step-no,
+  &:has(.step-no) .step-no {
+    position: static !important;
+    flex: 0 0 auto !important;
+    display: inline-flex !important;
+    align-items: center !important;
+    justify-content: center !important;
+    min-width: 22px !important;
+    height: 22px !important;
+    padding: 0 5px !important;
+    border-radius: 6px !important;
+    background: #f3f4f6 !important;
+    color: #6b7280 !important;
+    font-family: ui-monospace, "SF Mono", Consolas, monospace !important;
+    font-size: 12px !important;
+    font-weight: 700 !important;
+    line-height: 1 !important;
+    letter-spacing: 0 !important;
+    &::after { display: none !important; }
+  }
+
+  .step-name { color: inherit !important; }
+}
+
+.student-training-shell .flow-pill:hover:not(.active):not(.complete),
+.student-training-shell .step-tab:hover:not(.active):not(.complete) {
+  border-color: #1f2937 !important;
+  background: #f9fafb !important;
+  color: #1f2937 !important;
+  .step-no,
+  &:has(.step-no) .step-no {
+    background: #1f2937 !important;
+    color: #ffffff !important;
+  }
+}
+
+.student-training-shell .flow-pill.complete:not(.active),
+.student-training-shell .step-tab.complete:not(.active) {
+  border-color: #dce9e2 !important;
+  color: #374151 !important;
+  .step-no,
+  &:has(.step-no) .step-no {
+    background: rgba(74,157,110,.12) !important;
+    color: #3f8a5f !important;
+  }
+  &:hover {
+    border-color: #4a9d6e !important;
+    background: #f9fafb !important;
+    color: #374151 !important;
+    .step-no,
+    &:has(.step-no) .step-no {
+      background: #4a9d6e !important;
+      color: #ffffff !important;
+    }
+  }
 }
 
 .student-training-shell .flow-pill.active,
 .student-training-shell .step-tab.active {
-  border-color: #1e88e5 !important;
+  border-color: #1f2937 !important;
+  background: #1f2937 !important;
   color: #ffffff !important;
-  background: linear-gradient(95deg, #1e88e5, #1565c0) !important;
-  box-shadow: 0 2px 8px rgba(30, 136, 229, 0.25) !important;
+  font-weight: 700 !important;
+  box-shadow: 0 2px 6px rgba(31,41,55,.16) !important;
+  .step-no,
+  &:has(.step-no) .step-no {
+    background: #ffffff !important;
+    color: #1f2937 !important;
+  }
+  &:hover {
+    background: #111827 !important;
+    border-color: #111827 !important;
+  }
 }
 
+/* 窄屏步骤导航横向滑动 */
+@media (max-width: 900px) {
+  .student-training-shell .step-indicator {
+    overflow-x: auto !important;
+    flex-wrap: nowrap !important;
+    justify-content: flex-start !important;
+  }
+  .student-training-shell .step-tab,
+  .student-training-shell .flow-pill {
+    flex: 0 0 auto !important;
+    min-width: 140px !important;
+  }
+}
+
+/* flow-rail 旧布局兼容（保留但改色） */
 .student-training-shell .flow-rail {
   display: flex !important;
   flex-wrap: nowrap !important;
@@ -292,9 +389,9 @@
   width: 100% !important;
   margin: 0 0 16px !important;
   padding: 4px !important;
-  border: 1px solid var(--student-panel-border) !important;
+  border: 1px solid #e5e7eb !important;
   border-radius: 60px !important;
-  background: #f0f6fd !important;
+  background: #f9fafb !important;
 }
 
 .student-training-shell .flow-step {
@@ -304,37 +401,42 @@
   justify-content: center !important;
   gap: 6px !important;
   min-width: 0 !important;
-  min-height: var(--student-step-height) !important;
-  height: var(--student-step-height) !important;
+  min-height: 34px !important;
+  height: 34px !important;
   padding: 0 8px !important;
   border: 1px solid transparent !important;
-  border-radius: var(--student-radius-pill) !important;
-  color: #5a7a9a !important;
+  border-radius: 999px !important;
+  color: #6b7280 !important;
   background: transparent !important;
   box-shadow: none !important;
+  font-size: 12px !important;
+  font-weight: 600 !important;
+  letter-spacing: 0 !important;
+  text-align: center !important;
+  overflow-wrap: anywhere !important;
 }
 
 .student-training-shell .flow-step span {
   display: inline-flex !important;
   align-items: center !important;
   justify-content: center !important;
-  flex: 0 0 24px !important;
-  width: 24px !important;
-  height: 24px !important;
+  flex: 0 0 22px !important;
+  width: 22px !important;
+  height: 22px !important;
   margin: 0 !important;
-  border-radius: 50% !important;
-  color: #ffffff !important;
-  background: linear-gradient(95deg, #1e88e5, #1565c0) !important;
+  border-radius: 6px !important;
+  color: #6b7280 !important;
+  background: #f3f4f6 !important;
   font-size: 12px !important;
-  font-weight: 800 !important;
+  font-weight: 700 !important;
   line-height: 1 !important;
 }
 
 .student-training-shell .flow-step strong {
   min-width: 0 !important;
-  color: #1e3a5f !important;
-  font-size: var(--student-step-font) !important;
-  font-weight: 800 !important;
+  color: inherit !important;
+  font-size: 12px !important;
+  font-weight: 600 !important;
   line-height: 1.25 !important;
   letter-spacing: 0 !important;
   text-align: center !important;
@@ -345,10 +447,10 @@
   width: 100% !important;
   margin: 12px 0 16px !important;
   padding: 12px !important;
-  border: 1px solid #cfe2f5 !important;
+  border: 1px solid #e5e7eb !important;
   border-radius: 16px !important;
-  background: #f0f6fd !important;
-  box-shadow: 0 2px 8px rgba(30, 136, 229, 0.06) !important;
+  background: #ffffff !important;
+  box-shadow: none !important;
 }
 
 .training-step-area::before {
@@ -360,12 +462,12 @@
   min-width: 92px !important;
   margin: 0 0 14px !important;
   padding: 0 14px !important;
-  border: 1px solid #1e88e5 !important;
+  border: 1px solid #e5e7eb !important;
   border-radius: 999px !important;
-  color: #ffffff !important;
-  background: linear-gradient(95deg, #1e88e5, #1565c0) !important;
+  color: #111827 !important;
+  background: #f3f4f6 !important;
   font-size: var(--student-fs-body) !important;
-  font-weight: 800 !important;
+  font-weight: 700 !important;
   line-height: 1 !important;
   letter-spacing: 0 !important;
 }
@@ -376,9 +478,9 @@
   gap: 8px !important;
   min-height: 34px !important;
   margin: 10px 0 8px !important;
-  color: #1e3a5f !important;
+  color: #1f2937 !important;
   font-size: 16px !important;
-  font-weight: 800 !important;
+  font-weight: 700 !important;
   line-height: 1.45 !important;
   letter-spacing: 0 !important;
 }
@@ -402,7 +504,7 @@
 .training-step-area li,
 .training-step-area .online,
 .training-step-area .online span {
-  color: #2c4a6a !important;
+  color: #374151 !important;
   font-size: var(--student-fs-body) !important;
   line-height: 1.75 !important;
   letter-spacing: 0 !important;
@@ -422,17 +524,22 @@
   height: 40px !important;
   min-height: 40px !important;
   padding: 0 18px !important;
-  border: 1px solid #1e88e5 !important;
-  border-radius: 6px !important;
+  border: 1px solid #1f2937 !important;
+  border-radius: 10px !important;
   color: #ffffff !important;
-  background: linear-gradient(180deg, #42a5f5, #1e88e5) !important;
-  box-shadow: none !important;
+  background: #1f2937 !important;
+  box-shadow: 0 2px 6px rgba(31,41,55,.16) !important;
   font-size: var(--student-fs-body) !important;
-  font-weight: 800 !important;
+  font-weight: 700 !important;
   line-height: 1 !important;
   letter-spacing: 0 !important;
 }
 
+.training-step-area .el-button:hover {
+  background: #111827 !important;
+  border-color: #111827 !important;
+}
+
 .training-step-area .el-button span {
   color: inherit !important;
   font-size: inherit !important;
@@ -444,7 +551,7 @@
   flex-wrap: wrap !important;
   justify-content: center !important;
   align-items: center !important;
-  gap: 20px !important;
+  gap: 14px !important;
   margin-top: 20px !important;
   padding: 0 !important;
 }
@@ -456,18 +563,20 @@
   justify-content: center !important;
   min-width: 112px !important;
   width: auto !important;
-  height: var(--student-action-height) !important;
-  min-height: var(--student-action-height) !important;
-  padding: 0 16px !important;
-  border: 1px solid #1e88e5 !important;
-  border-radius: var(--student-radius-sm) !important;
-  color: #1e3a5f !important;
-  background: #e3f2fd !important;
+  height: 40px !important;
+  min-height: 40px !important;
+  padding: 0 18px !important;
+  border: 1px solid #e5e7eb !important;
+  border-radius: 10px !important;
+  color: #1f2937 !important;
+  background: #ffffff !important;
   box-shadow: none !important;
-  font-size: var(--student-action-font) !important;
-  font-weight: 900 !important;
+  font-size: var(--student-fs-body) !important;
+  font-weight: 700 !important;
   line-height: 1 !important;
   letter-spacing: 0 !important;
+  cursor: pointer;
+  transition: background-color .16s ease, border-color .16s ease, transform .16s ease, box-shadow .16s ease !important;
 }
 
 .student-training-shell .training-actions .el-button.training-action span,
@@ -478,9 +587,33 @@
 
 .student-training-shell .training-actions .el-button.training-action:hover:not(.is-disabled),
 .student-training-shell .training-actions button.training-action:hover:not(:disabled) {
-  border-color: #1565c0 !important;
-  color: #1565c0 !important;
-  background: #bbdefb !important;
+  border-color: #1f2937 !important;
+  color: #1f2937 !important;
+  background: #f9fafb !important;
+  transform: translateY(-1px) !important;
+  box-shadow: 0 3px 10px rgba(31,41,55,.14) !important;
+}
+
+.student-training-shell .training-actions .el-button.training-action.primary,
+.student-training-shell .training-actions button.training-action.primary {
+  border: 1px solid #1f2937 !important;
+  color: #ffffff !important;
+  background: #1f2937 !important;
+  box-shadow: 0 2px 6px rgba(31,41,55,.16) !important;
+}
+
+.student-training-shell .training-actions .el-button.training-action.primary:hover:not(.is-disabled),
+.student-training-shell .training-actions button.training-action.primary:hover:not(:disabled) {
+  background: #111827 !important;
+  border-color: #111827 !important;
+  box-shadow: 0 4px 12px rgba(31,41,55,.24) !important;
+}
+
+.student-training-shell .training-actions .el-button.training-action.is-disabled,
+.student-training-shell .training-actions button.training-action:disabled {
+  opacity: .5 !important;
+  transform: none !important;
+  box-shadow: none !important;
 }
 
 /* 新产品调查等页面使用 task-actions，而非 training-action。统一底部提交/重置按钮规格。 */
@@ -655,19 +788,28 @@
   flex: 0 0 auto !important;
   min-width: 0 !important;
   width: auto !important;
-  height: 34px !important;
-  min-height: 34px !important;
-  max-height: 34px !important;
+  height: 40px !important;
+  min-height: 40px !important;
+  max-height: 40px !important;
   margin: 0 !important;
-  padding: 0 12px !important;
-  border: 1px solid #1e88e5 !important;
-  border-radius: var(--student-radius-pill) !important;
-  color: #1e3a5f !important;
-  background: #e3f2fd !important;
+  padding: 0 18px !important;
+  border: 1px solid #e5e7eb !important;
+  border-radius: 10px !important;
+  color: #1f2937 !important;
+  background: #ffffff !important;
   font-size: 13px !important;
-  font-weight: 800 !important;
+  font-weight: 700 !important;
   line-height: 1 !important;
   white-space: nowrap !important;
+  cursor: pointer;
+  transition: background-color .16s ease, border-color .16s ease, transform .16s ease, box-shadow .16s ease !important;
+  &:hover {
+    border-color: #1f2937 !important;
+    background: #f9fafb !important;
+    color: #1f2937 !important;
+    transform: translateY(-1px) !important;
+    box-shadow: 0 3px 10px rgba(31,41,55,.14) !important;
+  }
 }
 
 .student-training-shell .el-button.upload-action,
@@ -681,19 +823,23 @@
   gap: 8px !important;
   min-width: 0 !important;
   width: auto !important;
-  height: var(--student-upload-height) !important;
-  min-height: var(--student-upload-height) !important;
+  height: 40px !important;
+  min-height: 40px !important;
   padding: 0 18px !important;
-  border: 1px solid #1e88e5 !important;
-  border-radius: var(--student-radius-pill) !important;
+  border: 1px solid #1f2937 !important;
+  border-radius: 10px !important;
   color: #ffffff !important;
-  background: linear-gradient(95deg, #1e88e5, #1565c0) !important;
-  box-shadow: none !important;
+  background: #1f2937 !important;
+  box-shadow: 0 2px 6px rgba(31,41,55,.16) !important;
   font-size: var(--student-upload-font) !important;
-  font-weight: 800 !important;
+  font-weight: 700 !important;
   line-height: 1 !important;
   letter-spacing: 0 !important;
   white-space: nowrap !important;
+  &:hover {
+    background: #111827 !important;
+    border-color: #111827 !important;
+  }
 }
 
 .student-training-shell textarea,
@@ -747,13 +893,13 @@
   min-width: 136px !important;
   height: 36px !important;
   padding: 0 12px !important;
-  border: 1px solid #1e88e5 !important;
-  border-radius: 6px !important;
-  color: #1e3a5f !important;
-  background: #e3f2fd !important;
+  border: 1px solid #e5e7eb !important;
+  border-radius: 8px !important;
+  color: #1f2937 !important;
+  background: #ffffff !important;
   box-shadow: none !important;
   font-size: var(--student-fs-body) !important;
-  font-weight: 800 !important;
+  font-weight: 700 !important;
   line-height: 1 !important;
   letter-spacing: 0 !important;
 }
@@ -761,9 +907,9 @@
 .legacy-training-page .top_item .el-button.active,
 .legacy-training-page .top_item .active {
   transform: none !important;
-  border-color: #1e88e5 !important;
+  border-color: #1f2937 !important;
   color: #ffffff !important;
-  background: linear-gradient(95deg, #1e88e5, #1565c0) !important;
+  background: #1f2937 !important;
 }
 
 // Keep long step names inside the navigation rail. Their complete name remains

src/views/components/TrainingTaskBrief.vue

@@ -130,11 +130,18 @@ function normalizeGoals(value) {
 
 <style lang="scss" scoped>
 .training-task-brief {
-  margin-bottom: 14px;
+  --brief-accent: #1f2937;
+  --brief-accent-deep: #111827;
+  --brief-accent-soft: #f3f4f6;
+  --brief-panel-border: #e5e7eb;
+  --brief-text: #1f2937;
+  --brief-text-secondary: #6b7280;
+
+  margin-bottom: 10px;
   padding: 12px 16px;
-  border: 1px solid #90caf9;
-  border-radius: 20px;
-  background: #f0f6fd;
+  border: 1px solid var(--brief-panel-border);
+  border-radius: 12px;
+  background: #ffffff;
   box-shadow: none;
 }
 
@@ -163,25 +170,30 @@ function normalizeGoals(value) {
   justify-content: center;
   gap: 8px;
   min-width: 0;
-  height: 40px;
+  height: 36px;
   padding: 0 12px;
-  border: 1px solid #90caf9;
-  border-radius: 6px;
-  color: #2c4a6a;
-  background: #e3f2fd;
+  border: 1px solid var(--brief-panel-border);
+  border-radius: 8px;
+  color: var(--brief-text-secondary);
+  background: var(--brief-accent-soft);
   cursor: pointer;
-  font-size: var(--student-fs-body);
-  font-weight: 800;
+  font-size: 12px;
+  font-weight: 600;
   line-height: 1;
-  transition: border-color 0.18s ease, color 0.18s ease, background 0.18s ease, box-shadow 0.18s ease;
+  transition: border-color 0.16s ease, color 0.16s ease, background 0.16s ease;
+
+  &:hover {
+    border-color: var(--brief-accent);
+    color: var(--brief-accent);
+    background: #ffffff;
   }
 
-.brief-tab:hover,
-.brief-tab.is-active {
-  border-color: #1565c0;
-  color: #1e3a5f;
-  background: #bbdefb;
-  box-shadow: none;
+  &.is-active {
+    border-color: var(--brief-accent);
+    color: #ffffff;
+    background: var(--brief-accent);
+    box-shadow: 0 2px 6px rgba(17, 24, 39, 0.18);
+  }
 }
 
 .brief-tab-icon,
@@ -189,32 +201,32 @@ function normalizeGoals(value) {
   display: inline-flex;
   align-items: center;
   justify-content: center;
-  width: 18px;
-  height: 18px;
-  flex: 0 0 18px;
+  width: 16px;
+  height: 16px;
+  flex: 0 0 16px;
   line-height: 1;
 
   .el-icon {
     display: block;
-    width: 18px;
-    height: 18px;
-    font-size: 18px;
+    width: 16px;
+    height: 16px;
+    font-size: 16px;
     line-height: 1;
   }
 }
 
-.brief-tab-icon,
-.brief-panel-icon,
-.brief-tab--background .brief-tab-icon,
-.brief-tab--goals .brief-tab-icon,
-.brief-tab--requirements .brief-tab-icon {
-  color: #1e88e5;
+.brief-tab .brief-tab-icon {
+  color: inherit;
+}
+
+.brief-tab.is-active .brief-tab-icon {
+  color: inherit;
 }
 
 .brief-panel {
-  border: 1px solid rgba(187, 222, 251, 0.2);
-  border-radius: 20px;
-  background: #f0f6fd;
+  border: 1px solid var(--brief-panel-border);
+  border-radius: 10px;
+  background: var(--brief-accent-soft);
   overflow: hidden;
 }
 
@@ -222,30 +234,30 @@ function normalizeGoals(value) {
   display: flex;
   align-items: center;
   gap: 8px;
-  height: 40px;
+  height: 36px;
   padding: 0 14px;
-  border-bottom: 1px solid rgba(187, 222, 251, 0.2);
-  color: #1e3a5f;
-  font-size: var(--student-fs-h2);
-  font-weight: 900;
+  border-bottom: 1px solid var(--brief-panel-border);
+  color: var(--brief-text);
+  font-size: 13px;
+  font-weight: 700;
   line-height: 1;
 }
 
 .brief-scroll {
   max-height: 160px;
-  min-height: 110px;
+  min-height: 100px;
   overflow-y: auto;
   overscroll-behavior: contain;
   scrollbar-width: thin;
-  scrollbar-color: #cfe2f5 #f0f6fd;
+  scrollbar-color: var(--brief-panel-border) var(--brief-accent-soft);
 }
 
 .brief-content {
   margin: 0;
   padding: 10px 16px 12px;
-  color: #2c4a6a;
-  font-size: var(--student-fs-body);
-  line-height: 1.85;
+  color: var(--brief-text-secondary);
+  font-size: 13px;
+  line-height: 1.6;
 }
 
 .brief-goals {
@@ -253,8 +265,11 @@ function normalizeGoals(value) {
   list-style: none;
 
   li {
-    padding: 5px 0 5px 12px;
-    border-left: 2px solid #cfe2f5;
+    padding: 4px 0 4px 12px;
+    border-left: 2px solid var(--brief-panel-border);
+    color: var(--brief-text-secondary);
+    font-size: 13px;
+    line-height: 1.55;
   }
 
   li + li {
@@ -263,16 +278,16 @@ function normalizeGoals(value) {
 }
 
 .brief-scroll::-webkit-scrollbar {
-  width: 8px;
+  width: 6px;
 }
 
 .brief-scroll::-webkit-scrollbar-track {
-  background: #f0f6fd;
+  background: var(--brief-accent-soft);
 }
 
 .brief-scroll::-webkit-scrollbar-thumb {
-  border-radius: 8px;
-  background: #cfe2f5;
+  border-radius: 6px;
+  background: var(--brief-panel-border);
 }
 
 @media (max-width: 768px) {
@@ -289,13 +304,14 @@ function normalizeGoals(value) {
   }
 
   .brief-tab {
-    height: 36px;
+    height: 34px;
     padding: 0 8px;
-    font-size: var(--student-fs-body);
+    font-size: 11px;
   }
 
   .brief-scroll {
-    height: 140px;
+    max-height: 140px;
+    min-height: 90px;
   }
 }
 </style>

src/views/demand/competitive-environment-analysis.vue

@@ -671,18 +671,18 @@ function exportOutcome() { const blob = new Blob([JSON.stringify(buildDraft(), n
   .step-connector { display: none !important; }
 
   .step-tab {
-    flex: 1 1 0 !important;
-    max-width: 220px !important;
+    flex: 0 0 auto !important;
+    min-width: auto !important;
+    max-width: none !important;
     display: flex !important;
     flex-direction: row !important;
     align-items: center !important;
     justify-content: center !important;
     gap: 8px !important;
-    min-width: 0 !important;
     height: auto !important;
     min-height: 42px !important;
     margin: 0 !important;
-    padding: 8px 12px !important;
+    padding: 8px 14px !important;
     border: 1px solid #e5e7eb !important;
     border-radius: 8px !important;
     background: #ffffff !important;
@@ -692,7 +692,7 @@ function exportOutcome() { const blob = new Blob([JSON.stringify(buildDraft(), n
     font-weight: 600 !important;
     line-height: 1.3 !important;
     letter-spacing: 0 !important;
-    white-space: normal !important;
+    white-space: nowrap !important;
     text-align: center !important;
     cursor: pointer;
     transition: background-color 0.16s ease, color 0.16s ease, border-color 0.16s ease !important;
@@ -779,7 +779,7 @@ function exportOutcome() { const blob = new Blob([JSON.stringify(buildDraft(), n
     overflow-x: auto !important;
   }
   #app .studentLayout section.app-main:has(.competitive-analysis-page) .step-indicator .step-tab {
-    flex: 0 0 148px !important;
+    flex: 0 0 auto !important;
     max-width: none !important;
   }
 }

src/views/demand/industry-demand-analysis.vue

@@ -692,18 +692,18 @@ function exportOutcome() { const blob = new Blob([JSON.stringify(buildDraft(), n
   .step-connector { display: none !important; }
 
   .step-tab {
-    flex: 1 1 0 !important;
-    max-width: 220px !important;
+    flex: 0 0 auto !important;
+    min-width: auto !important;
+    max-width: none !important;
     display: flex !important;
     flex-direction: row !important;
     align-items: center !important;
     justify-content: center !important;
     gap: 8px !important;
-    min-width: 0 !important;
     height: auto !important;
     min-height: 42px !important;
     margin: 0 !important;
-    padding: 8px 12px !important;
+    padding: 8px 14px !important;
     border: 1px solid #e5e7eb !important;
     border-radius: 8px !important;
     background: #ffffff !important;
@@ -713,7 +713,7 @@ function exportOutcome() { const blob = new Blob([JSON.stringify(buildDraft(), n
     font-weight: 600 !important;
     line-height: 1.3 !important;
     letter-spacing: 0 !important;
-    white-space: normal !important;
+    white-space: nowrap !important;
     text-align: center !important;
     cursor: pointer;
     transition: background-color 0.16s ease, color 0.16s ease, border-color 0.16s ease !important;
@@ -799,7 +799,7 @@ function exportOutcome() { const blob = new Blob([JSON.stringify(buildDraft(), n
     overflow-x: auto !important;
   }
   #app .studentLayout section.app-main:has(.industry-pest-page) .step-indicator .step-tab {
-    flex: 0 0 148px !important;
+    flex: 0 0 auto !important;
     max-width: none !important;
   }
 }

src/views/product/market-opportunity-selection.vue

@@ -815,18 +815,18 @@ function exportOutcome() { const blob = new Blob([JSON.stringify({ taskName: tas
   > i { display: none !important; }
 
   .step-tab {
-    flex: 1 1 0 !important;
-    max-width: 220px !important;
+    flex: 0 0 auto !important;
+    min-width: auto !important;
+    max-width: none !important;
     display: flex !important;
     flex-direction: row !important;
     align-items: center !important;
     justify-content: center !important;
     gap: 8px !important;
-    min-width: 0 !important;
     height: auto !important;
     min-height: 42px !important;
     margin: 0 !important;
-    padding: 8px 12px !important;
+    padding: 8px 14px !important;
     border: 1px solid #e5e7eb !important;
     border-radius: 8px !important;
     background: #ffffff !important;
@@ -836,7 +836,7 @@ function exportOutcome() { const blob = new Blob([JSON.stringify({ taskName: tas
     font-weight: 600 !important;
     line-height: 1.3 !important;
     letter-spacing: 0 !important;
-    white-space: normal !important;
+    white-space: nowrap !important;
     text-align: center !important;
     cursor: pointer;
     transition: background-color 0.16s ease, color 0.16s ease, border-color 0.16s ease !important;
@@ -924,7 +924,7 @@ function exportOutcome() { const blob = new Blob([JSON.stringify({ taskName: tas
     overflow-x: auto !important;
   }
   #app .studentLayout section.app-main:has(.opportunity-page) .step-indicator .step-tab {
-    flex: 0 0 148px !important;
+    flex: 0 0 auto !important;
     max-width: none !important;
   }
 }