/* ===========================
   1. 设计 Token (Design Tokens)
   =========================== */
:root {
  /* 颜色 */
  --color-primary: #1e88ff;
  --color-primary-hover: #1565c0;
  --color-primary-dark: #0a4dad;
  --color-primary-light: #e3f0ff;
  --color-primary-bg: #f0f5fa;
  --color-accent: #00d4ff;

  --color-text-primary: #1f2937;
  --color-text-secondary: #6b7280;
  --color-text-muted: #9ca3af;
  --color-text-link: #1e88ff;

  --color-bg: #f0f5fa;
  --color-card: #ffffff;
  --color-border: #e5e7eb;
  --color-border-light: #f0f3f7;

  --color-success: #10b981;
  --color-success-light: #d1fae5;
  --color-warning: #f59e0b;
  --color-warning-light: #fef3c7;
  --color-danger: #ef4444;
  --color-info: #3b82f6;

  /* 渐变 */
  --gradient-primary: linear-gradient(135deg, #00d4ff 0%, #1e88ff 50%, #0a4dad 100%);
  --gradient-course: linear-gradient(135deg, #00d4ff 0%, #1e88ff 100%);
  --gradient-card-1: linear-gradient(135deg, #0a1a2e 0%, #1e3a5f 50%, #1e88ff 100%);
  --gradient-card-2: linear-gradient(135deg, #00d4ff 0%, #1e88ff 100%);
  --gradient-user-summary: linear-gradient(135deg, #5fc77b 0%, #2ea663 100%);

  /* 尺寸 */
  --sidebar-width: 80px;
  --topbar-height: 56px;
  --content-padding: 24px;

  /* 圆角 */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;

  /* 阴影 */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 2px 8px rgba(0,0,0,0.06);
  --shadow-lg: 0 4px 16px rgba(0,0,0,0.08);

  /* 字体 */
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
}

/* ===========================
   2. Reset & Base
   =========================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html, body {
  height: 100%;
  font-family: var(--font-family);
  font-size: 14px;
  line-height: 1.5;
  color: var(--color-text-primary);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

input {
  font-family: inherit;
  outline: none;
  border: none;
}

ul, ol {
  list-style: none;
}

/* ===========================
   3. App 容器
   =========================== */
#app {
  min-height: 100vh;
}

/* 静态多页模式：无需 .page 切换 */

/* ===========================
   4. 登录页
   =========================== */
.login-page {
  min-height: 100vh;
  display: flex;
  position: relative;
  overflow: hidden;
}

.login-brand {
  flex: 1;
  background: var(--gradient-primary);
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 60px;
  color: #fff;
}

.login-brand::before {
  content: '';
  position: absolute;
  top: 80px;
  right: 200px;
  width: 100px;
  height: 100px;
  border: 2px dashed rgba(255,255,255,0.3);
  border-radius: 50%;
  animation: spin 30s linear infinite;
}

.login-brand::after {
  content: '';
  position: absolute;
  top: 110px;
  right: 230px;
  width: 40px;
  height: 40px;
  border: 1.5px solid rgba(255,255,255,0.4);
  border-radius: 50%;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.login-brand-content {
  max-width: 480px;
  position: relative;
  z-index: 1;
}

.login-logo {
  font-size: 96px;
  font-weight: 700;
  letter-spacing: 4px;
  line-height: 1;
  margin-bottom: 24px;
}

.login-tagline {
  font-size: 28px;
  font-weight: 500;
  margin-bottom: 16px;
}

.login-description {
  font-size: 15px;
  line-height: 1.7;
  opacity: 0.85;
}

.login-corner-icon {
  position: absolute;
  bottom: 100px;
  left: 100px;
  width: 60px;
  height: 60px;
  border: 1.5px solid rgba(255,255,255,0.3);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
}

.login-corner-icon::before {
  content: '';
  width: 28px;
  height: 28px;
  border: 1.5px solid rgba(255,255,255,0.3);
  border-radius: var(--radius-sm);
}

.login-form-wrapper {
  flex: 1;
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 60px;
}

.login-form {
  width: 100%;
  max-width: 400px;
}

.login-title {
  text-align: center;
  font-size: 24px;
  font-weight: 500;
  color: var(--color-text-primary);
  margin-bottom: 48px;
}

.form-group {
  margin-bottom: 24px;
}

.form-label {
  display: block;
  font-size: 14px;
  color: var(--color-text-primary);
  margin-bottom: 8px;
}

.form-input-wrap {
  position: relative;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: #fff;
  transition: all 0.2s;
}

.form-input-wrap:focus-within {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(30, 136, 255, 0.1);
}

.form-input {
  width: 100%;
  padding: 12px 14px 12px 48px;
  font-size: 14px;
  color: var(--color-text-primary);
  background: transparent;
  border: none;
  outline: none;
}

.form-input::placeholder {
  color: var(--color-text-muted);
}

.form-input-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-muted);
  font-size: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  pointer-events: none;
}

.form-input-icon-img {
  width: 18px;
  height: 18px;
  display: block;
  opacity: 0.85;
}

.form-input-icon-svg {
  display: block;
  color: var(--color-text-muted);
}

.form-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin: 16px 0 28px;
  font-size: 14px;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--color-text-secondary);
  cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--color-primary);
  cursor: pointer;
}

.link-primary {
  color: var(--color-primary);
  font-size: 14px;
}

.link-primary:hover {
  color: var(--color-primary-hover);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  border: none;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}

.btn-primary:hover {
  background: var(--color-primary-hover);
}

.btn-block {
  width: 100%;
  padding: 12px 20px;
  font-size: 15px;
}

.login-footer {
  text-align: center;
  margin-top: 24px;
  font-size: 14px;
  color: var(--color-text-secondary);
}

.quick-nav-demo {
  margin-top: 32px;
  padding-top: 20px;
  border-top: 1px dashed var(--color-border);
}

.quick-nav-title {
  font-size: 12px;
  color: var(--color-text-muted);
  margin-bottom: 10px;
  text-align: center;
}

.quick-nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  justify-content: center;
}

.quick-nav-link {
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  background: var(--color-primary-light);
  color: var(--color-primary);
  font-size: 12px;
  transition: all 0.2s;
}

.quick-nav-link:hover {
  background: var(--color-primary);
  color: #fff;
}

/* ===========================
   5. 内部页布局
   =========================== */
.internal-page {
  display: flex;
  min-height: 100vh;
}

/* 侧边栏 */
.sidebar {
  width: var(--sidebar-width);
  background: #fff;
  border-right: 1px solid var(--color-border-light);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  position: sticky;
  top: 0;
  height: 100vh;
}

.sidebar-logo {
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-bottom: 1px solid var(--color-border-light);
}

.logo-box {
  width: 140px;
  height: 48px;
  background: none;
  border-radius: 0;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 18px;
  overflow: hidden;
}

.sidebar-nav {
  flex: 1;
  padding: 12px 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 12px 8px;
  margin: 0 8px;
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  font-size: 12px;
  cursor: pointer;
  transition: all 0.2s;
  text-align: center;
  line-height: 1.3;
}

.nav-item:hover {
  background: var(--color-primary-light);
  color: var(--color-primary);
}

.nav-item.active {
  background: var(--color-primary-light);
  color: var(--color-primary);
  font-weight: 500;
}

.nav-item .nav-icon {
  font-size: 20px;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
}

.nav-item .nav-icon-img {
  width: 22px;
  height: 22px;
  display: block;
  object-fit: contain;
}

.nav-item.active .nav-icon-img {
  filter: brightness(0) saturate(100%) invert(35%) sepia(85%) saturate(2476%) hue-rotate(213deg) brightness(99%) contrast(96%);
}

/* 我的考试图标调大 */
.nav-icon-exam {
  width: 36px !important;
  height: 36px !important;
}

/* 主内容区 */
.main-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

/* 顶栏 */
.topbar {
  height: var(--topbar-height);
  background: #fff;
  border-bottom: 1px solid var(--color-border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  position: sticky;
  top: 0;
  z-index: 10;
}

.topbar-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.menu-toggle {
  font-size: 18px;
  color: var(--color-text-secondary);
  cursor: pointer;
  padding: 4px;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--color-text-secondary);
}

.breadcrumb a {
  color: var(--color-text-secondary);
  transition: color 0.2s;
}

.breadcrumb a:hover {
  color: var(--color-primary);
}

.breadcrumb .separator {
  color: var(--color-text-muted);
}

.breadcrumb .current {
  color: var(--color-text-primary);
  font-weight: 500;
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 20px;
}

.lang-switch {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--color-text-secondary);
}

.lang-switch a {
  color: var(--color-text-secondary);
}

.lang-switch a.active {
  color: var(--color-primary);
  font-weight: 500;
}

.user-info {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: var(--radius-md);
  transition: background 0.2s;
}

.user-info:hover {
  background: var(--color-primary-light);
}

.user-avatar-sm {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  overflow: hidden;
  background: var(--color-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 600;
  flex-shrink: 0;
}

.user-info .user-name {
  font-size: 14px;
  color: var(--color-text-primary);
}

.user-info .user-role {
  color: var(--color-text-muted);
}

/* 学员下拉菜单 */
.user-dropdown-wrapper {
  position: relative;
}

.user-dropdown-menu {
  display: none;
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  min-width: 160px;
  background: #fff;
  border-radius: var(--radius-md);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
  padding: 4px 0;
  z-index: 1000;
}

.user-dropdown-menu.show {
  display: block;
}

.user-dropdown-menu .dropdown-item {
  display: block;
  padding: 10px 16px;
  font-size: 14px;
  color: var(--color-text-primary);
  text-decoration: none;
  transition: background 0.2s, color 0.2s;
}

.user-dropdown-menu .dropdown-item:hover {
  background: var(--color-primary-light);
  color: var(--color-primary);
}

/* 内容区 */
.content {
  flex: 1;
  padding: var(--content-padding);
  overflow-y: auto;
}

.content-card {
  background: #fff;
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  margin-bottom: 16px;
}

.page-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: 16px;
}

/* ===========================
   6. 个人中心
   =========================== */
.profile-header {
  background: #fff;
  border-radius: var(--radius-md);
  padding: 24px 32px;
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 16px;
  box-shadow: var(--shadow-sm);
  position: relative;
}

.profile-avatar {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--gradient-course);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  font-weight: 600;
  flex-shrink: 0;
}

.profile-info {
  flex: 1;
}

.profile-name {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}

.profile-contact {
  display: flex;
  gap: 24px;
  font-size: 13px;
  color: var(--color-text-secondary);
  margin-bottom: 12px;
}

.profile-contact span {
  display: flex;
  align-items: center;
  gap: 6px;
}

.profile-stats {
  display: flex;
  gap: 28px;
}

.stat-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--color-text-secondary);
}

.stat-item .stat-value {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text-primary);
}

.stat-item .stat-value.success {
  color: var(--color-success);
}

.stat-item .stat-value.primary {
  color: var(--color-primary);
}

.edit-profile-btn {
  position: absolute;
  top: 24px;
  right: 32px;
  display: flex;
  align-items: center;
  gap: 4px;
  color: var(--color-primary);
  font-size: 13px;
  cursor: pointer;
}

/* 编辑弹窗 */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0,0,0,0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
}

.modal-content {
  background: #fff;
  border-radius: var(--radius-md);
  width: 520px;
  max-width: 90vw;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 20px 60px rgba(0,0,0,0.2);
}

.modal-content.modal-lg {
  width: 720px;
}

/* 弹窗头像区域 */
.modal-avatar-section {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 20px 24px;
  border-bottom: 1px solid var(--color-border-light);
  background: var(--color-bg-light, #f8f9fa);
}

.modal-avatar-preview {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  overflow: hidden;
  flex-shrink: 0;
  border: 3px solid #fff;
  box-shadow: 0 2px 8px rgba(0,0,0,0.12);
}

.modal-avatar-preview img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.modal-avatar-upload {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.avatar-upload-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: var(--color-primary);
  color: #fff;
  border-radius: var(--radius-sm);
  font-size: 13px;
  cursor: pointer;
  transition: opacity 0.2s;
}

.avatar-upload-btn:hover {
  opacity: 0.85;
}

.avatar-hint {
  font-size: 12px;
  color: var(--color-text-muted);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  border-bottom: 1px solid var(--color-border-light);
}

.modal-header h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text-primary);
  margin: 0;
}

.modal-close {
  background: none;
  border: none;
  font-size: 22px;
  color: var(--color-text-muted);
  cursor: pointer;
  line-height: 1;
  padding: 0;
}

.modal-close:hover {
  color: var(--color-text-primary);
}

.modal-content form {
  padding: 20px 24px 24px;
}

/* 表单分区标题 */
.form-section-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text-primary);
  padding: 16px 0 12px;
  border-bottom: 1px solid var(--color-border-light);
  margin-bottom: 16px;
}

.form-section-title:first-child {
  padding-top: 4px;
}

/* 双列网格表单 */
.form-row-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px 20px;
}

.modal-content .form-group {
  margin-bottom: 0;
}

.modal-content .form-label {
  font-size: 13px;
  font-weight: 500;
  color: var(--color-text-secondary);
  margin-bottom: 6px;
  display: block;
}

.modal-content .form-input {
  width: 100%;
  padding: 9px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--color-text-primary);
  background: #fff;
  transition: border-color 0.2s, box-shadow 0.2s;
  outline: none;
  box-sizing: border-box;
}

.modal-content .form-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(30,136,255,0.1);
}

.modal-content .form-input::placeholder {
  color: var(--color-text-muted);
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  padding-top: 8px;
}

.btn-outline {
  background: #fff;
  border: 1px solid var(--color-border);
  color: var(--color-text-primary);
}

.btn-outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* Tabs */
.tabs {
  background: #fff;
  border-radius: var(--radius-md) var(--radius-md) 0 0;
  padding: 0 24px;
  display: flex;
  gap: 32px;
  border-bottom: 1px solid var(--color-border-light);
}

.tab {
  padding: 16px 0;
  font-size: 14px;
  color: var(--color-text-secondary);
  cursor: pointer;
  position: relative;
  transition: color 0.2s;
  text-decoration: none;
}

.tab:hover {
  color: var(--color-primary);
}

.tab.active {
  color: var(--color-primary);
  font-weight: 500;
}

.tab.active::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 50%;
  transform: translateX(-50%);
  width: 32px;
  height: 2px;
  background: var(--color-primary);
  border-radius: 2px;
}

.tab-content {
  background: #fff;
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  padding: 24px 32px;
  box-shadow: var(--shadow-sm);
}

.section-title {
  font-size: 16px;
  font-weight: 500;
  color: var(--color-text-primary);
  margin-bottom: 20px;
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px 32px;
  margin-bottom: 32px;
}

.info-item {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.info-label {
  font-size: 13px;
  color: var(--color-text-muted);
}

.info-value {
  font-size: 14px;
  color: var(--color-text-primary);
}

/* ===========================
   7. 课程详情
   =========================== */
.course-header {
  background: #fff;
  border-radius: var(--radius-md);
  padding: 20px 24px;
  display: flex;
  gap: 20px;
  align-items: center;
  margin-bottom: 16px;
  box-shadow: var(--shadow-sm);
}

.course-thumb {
  width: 180px;
  height: 120px;
  border-radius: var(--radius-md);
  background: var(--gradient-course);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 36px;
  flex-shrink: 0;
  position: relative;
}

.course-thumb::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.1), transparent);
  border-radius: var(--radius-md);
}

.course-info {
  flex: 1;
  min-width: 0;
}

.course-tags {
  display: flex;
  gap: 8px;
  margin-bottom: 8px;
}

.tag {
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  font-size: 12px;
  font-weight: 500;
}

.tag-primary-light {
  background: var(--color-primary-light);
  color: var(--color-primary);
}

.tag-success-light {
  background: var(--color-success-light);
  color: var(--color-success);
}

.course-title {
  font-size: 20px;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: 8px;
}

.course-desc {
  font-size: 13px;
  color: var(--color-text-secondary);
  margin-bottom: 12px;
}

.course-meta {
  display: flex;
  gap: 24px;
  font-size: 13px;
  color: var(--color-text-secondary);
}

.course-meta span {
  display: flex;
  align-items: center;
  gap: 4px;
}

.start-learning-btn {
  padding: 10px 24px;
  background: var(--color-primary);
  color: #fff;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 500;
  flex-shrink: 0;
  align-self: flex-start;
}

.start-learning-btn:hover {
  background: var(--color-primary-hover);
}

/* 课程 tab 内容 */
.course-tabs {
  background: #fff;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.course-tab-bar {
  display: flex;
  gap: 32px;
  padding: 0 24px;
  border-bottom: 1px solid var(--color-border-light);
}

.course-tab {
  padding: 16px 0;
  font-size: 14px;
  color: var(--color-text-secondary);
  cursor: pointer;
  position: relative;
  display: flex;
  align-items: center;
  gap: 6px;
}

.course-tab .badge {
  background: var(--color-primary-light);
  color: var(--color-primary);
  font-size: 11px;
  padding: 1px 6px;
  border-radius: 8px;
  font-weight: 500;
}

.course-tab.active {
  color: var(--color-primary);
  font-weight: 500;
}

.course-tab.active::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 50%;
  transform: translateX(-50%);
  width: 32px;
  height: 2px;
  background: var(--color-primary);
  border-radius: 2px;
}

.course-tab-pane {
  padding: 24px;
  display: none;
}

.course-tab-pane.active {
  display: block;
}

/* 课程大纲 */
.course-section {
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  background: #fff;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
  cursor: pointer;
  user-select: none;
}

.section-header-left {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 15px;
  font-weight: 500;
}

.section-header-right {
  font-size: 13px;
  color: var(--color-text-secondary);
}

.section-items {
  border-top: 1px solid var(--color-border-light);
}

.section-item {
  display: flex;
  align-items: center;
  padding: 12px 20px;
  gap: 12px;
  border-bottom: 1px solid var(--color-border-light);
  font-size: 14px;
}

.section-item:last-child {
  border-bottom: none;
}

.section-item-icon {
  font-size: 18px;
  color: var(--color-primary);
  width: 20px;
  text-align: center;
}

.section-item-icon.locked {
  color: var(--color-text-muted);
}

.section-item-title {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 8px;
}

.section-item-tag {
  font-size: 11px;
  padding: 1px 6px;
  border-radius: 3px;
}

.section-item-duration {
  color: var(--color-text-secondary);
  font-size: 13px;
}

.section-item-action {
  font-size: 18px;
  color: var(--color-primary);
  cursor: pointer;
}

/* 课程详情内容 */
.detail-section {
  margin-bottom: 32px;
}

.detail-section-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: 16px;
  padding-left: 10px;
  border-left: 3px solid var(--color-primary);
}

.detail-text {
  font-size: 14px;
  line-height: 1.8;
  color: var(--color-text-primary);
  margin-bottom: 12px;
  text-indent: 2em;
}

.outline-list {
  padding-left: 10px;
}

.outline-list li {
  font-size: 14px;
  line-height: 2;
  color: var(--color-text-primary);
}

/* ===========================
   8. 首页
   =========================== */
.welcome-banner {
  background: var(--gradient-course);
  border-radius: var(--radius-md);
  padding: 20px 28px;
  color: #fff;
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  box-shadow: var(--shadow-sm);
}

.welcome-text h2 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 6px;
}

.welcome-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.welcome-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  overflow: hidden;
  border: 2px solid rgba(255,255,255,0.4);
  flex-shrink: 0;
}

.welcome-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.welcome-text p {
  font-size: 13px;
  opacity: 0.9;
}

.welcome-text .highlight {
  color: #fff;
  font-weight: 600;
}

.welcome-btn {
  background: rgba(255,255,255,0.2);
  border: 1px solid rgba(255,255,255,0.4);
  color: #fff;
  padding: 8px 20px;
  border-radius: var(--radius-md);
  font-size: 13px;
  backdrop-filter: blur(4px);
}

.welcome-btn:hover {
  background: rgba(255,255,255,0.3);
}

.home-row {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 16px;
  margin-bottom: 16px;
}

.feature-banner {
  background: var(--gradient-card-1);
  border-radius: var(--radius-md);
  height: 240px;
  color: #fff;
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  box-shadow: var(--shadow-sm);
}

/* 首页 banner 右侧用户信息卡片 */
.user-summary-card {
  background: var(--gradient-user-summary);
  border-radius: var(--radius-md);
  padding: 24px 20px;
  color: #fff;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--shadow-sm);
  min-height: 240px;
}

.user-summary-top {
  display: flex;
  align-items: center;
  gap: 14px;
}

.user-summary-avatar-lg {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.25);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  font-weight: 600;
  flex-shrink: 0;
}

.user-summary-avatar-lg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.user-summary-name {
  font-size: 18px;
  font-weight: 600;
  color: #fff;
}

.user-summary-stats {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-top: 24px;
}

.summary-stat {
  flex: 1;
  text-align: center;
}

.summary-stat-value {
  font-size: 24px;
  font-weight: 700;
  color: #fff;
  line-height: 1.2;
}

.summary-stat-label {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.85);
  margin-top: 4px;
}

.quick-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 16px;
}

.feature-banner::before {
  content: '';
  position: absolute;
  top: -50px;
  right: -50px;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(0,212,255,0.3), transparent 70%);
  border-radius: 50%;
}

.feature-banner-content {
  position: relative;
  z-index: 1;
}

.feature-tag {
  display: inline-block;
  padding: 2px 10px;
  background: rgba(0,212,255,0.3);
  border: 1px solid rgba(0,212,255,0.5);
  border-radius: 4px;
  font-size: 12px;
  margin-bottom: 12px;
}

.feature-title {
  font-size: 24px;
  font-weight: 600;
  margin-bottom: 8px;
}

.feature-desc {
  font-size: 13px;
  opacity: 0.85;
  margin-bottom: 16px;
}

.feature-dots {
  display: flex;
  gap: 6px;
}

.feature-dot {
  width: 16px;
  height: 4px;
  background: rgba(255,255,255,0.4);
  border-radius: 2px;
}

.feature-dot.active {
  background: #fff;
}

/* Banner Carousel */
.banner-slider {
  position: relative;
  width: 100%;
  height: 100%;
}

.banner-slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 0.6s ease;
  z-index: 0;
}

.banner-slide.active {
  opacity: 1;
  z-index: 1;
}

.banner-slide a {
  display: block;
  width: 100%;
  height: 100%;
}

.banner-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.banner-caption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 12px 20px;
  background: linear-gradient(transparent, rgba(0,0,0,0.55));
  color: #fff;
  font-size: 14px;
  font-weight: 500;
  z-index: 2;
}

.banner-dots {
  position: absolute;
  bottom: 12px;
  right: 16px;
  display: flex;
  gap: 6px;
  z-index: 10;
}

.banner-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255,255,255,0.5);
  cursor: pointer;
  transition: all 0.3s;
}

.banner-dot.active {
  background: #fff;
  transform: scale(1.2);
}

.banner-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 32px;
  height: 32px;
  border: none;
  border-radius: 50%;
  background: rgba(0,0,0,0.3);
  color: #fff;
  font-size: 18px;
  line-height: 32px;
  text-align: center;
  cursor: pointer;
  z-index: 10;
  opacity: 0;
  transition: opacity 0.3s;
}

.feature-banner:hover .banner-arrow {
  opacity: 1;
}

.banner-arrow:hover {
  background: rgba(0,0,0,0.55);
}

.banner-prev {
  left: 10px;
}

.banner-next {
  right: 10px;
}

.quick-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 16px;
}

.quick-card {
  background: #fff;
  border-radius: var(--radius-md);
  padding: 24px 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  transition: all 0.2s;
  box-shadow: var(--shadow-sm);
}

.quick-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.quick-icon {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--color-primary-light);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  overflow: hidden;
}

.quick-icon-img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
}

.quick-label {
  font-size: 13px;
  color: var(--color-text-primary);
}

.section-header-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.section-header-row h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text-primary);
}

.view-all {
  font-size: 13px;
  color: var(--color-primary);
  cursor: pointer;
}

.view-all:hover {
  text-decoration: underline;
}

/* 课程卡片 */
.course-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.course-card {
  background: #fff;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all 0.2s;
  cursor: pointer;
}

.course-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.course-card-thumb {
  height: 140px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.6);
  font-size: 40px;
}

.course-card-thumb.thumb-1 {
  background: var(--gradient-card-1);
}

.course-card-thumb.thumb-2 {
  background: var(--gradient-card-2);
}

.course-card-thumb.thumb-3 {
  background: var(--gradient-course);
}

.course-card-tag {
  position: absolute;
  top: 12px;
  left: 12px;
  background: rgba(255,255,255,0.95);
  color: var(--color-text-primary);
  font-size: 12px;
  padding: 2px 10px;
  border-radius: var(--radius-sm);
}

.course-card-tag.elective {
  background: rgba(255,255,255,0.95);
  color: var(--color-primary);
}

.course-card-body {
  padding: 14px 16px;
}

.course-card-title {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-primary);
  margin-bottom: 10px;
}

.course-card-progress {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--color-text-secondary);
  margin-bottom: 8px;
}

.progress-bar {
  flex: 1;
  height: 4px;
  background: #f0f3f7;
  border-radius: 2px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background: var(--gradient-course);
  border-radius: 2px;
  transition: width 0.3s;
}

/* ===========================
   9. 所有课程
   =========================== */
.all-courses-page .page-title {
  margin-bottom: 16px;
}

.search-bar {
  display: flex;
  gap: 12px;
  margin-bottom: 16px;
}

.search-input-wrap {
  position: relative;
  flex: 1;
}

.search-input {
  width: 100%;
  padding: 10px 14px 10px 40px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 14px;
  background: #fff;
}

.search-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(30, 136, 255, 0.1);
}

.search-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-muted);
}

.search-btn {
  position: absolute;
  right: 4px;
  top: 50%;
  transform: translateY(-50%);
  padding: 6px 14px;
  background: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm, 4px);
  font-size: 13px;
  cursor: pointer;
  white-space: nowrap;
}

.search-btn:hover {
  background: #1a7ae8;
}

.search-input-wrap .search-input {
  padding-right: 80px;
}

.select-wrap {
  position: relative;
}

.select-input {
  padding: 10px 32px 10px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 14px;
  background: #fff;
  cursor: pointer;
  appearance: none;
  min-width: 120px;
}

.select-wrap::after {
  content: '▾';
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-muted);
  pointer-events: none;
}

.filter-row {
  margin-bottom: 16px;
}

.filter-label {
  font-size: 13px;
  color: var(--color-text-secondary);
  margin-bottom: 8px;
}

.filter-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.filter-tab {
  padding: 6px 16px;
  border-radius: var(--radius-md);
  background: #fff;
  border: 1px solid var(--color-border);
  font-size: 13px;
  color: var(--color-text-primary);
  cursor: pointer;
  transition: all 0.2s;
}

.filter-tab:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.filter-tab.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

.stats-row {
  background: #fff;
  border-radius: var(--radius-md);
  padding: 20px;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  margin-bottom: 16px;
  box-shadow: var(--shadow-sm);
}

.stat-card {
  text-align: center;
  border-right: 1px solid var(--color-border-light);
}

.stat-card:last-child {
  border-right: none;
}

.stat-card .label {
  font-size: 13px;
  color: var(--color-text-secondary);
  margin-bottom: 8px;
}

.stat-card .value {
  font-size: 22px;
  font-weight: 600;
}

.stat-card .value.primary { color: var(--color-primary); }
.stat-card .value.success { color: var(--color-success); }
.stat-card .value.warning { color: var(--color-warning); }
.stat-card .value.danger { color: var(--color-danger); }
.stat-card .value.default { color: var(--color-text-primary); }

.section-title-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 16px 0 12px;
  font-size: 14px;
  color: var(--color-text-primary);
}

.section-title-row .count {
  color: var(--color-text-muted);
}

/* 课程列表项 */
.course-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 16px;
}

.course-item {
  background: #fff;
  border-radius: var(--radius-md);
  padding: 16px;
  display: flex;
  gap: 14px;
  align-items: center;
  cursor: pointer;
  transition: all 0.2s;
  box-shadow: var(--shadow-sm);
}

.course-item:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.course-item-thumb {
  width: 100px;
  height: 64px;
  border-radius: var(--radius-sm);
  background: var(--gradient-card-1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.7);
  font-size: 22px;
  flex-shrink: 0;
}

.course-item-thumb.t1 { background: var(--gradient-card-1); }
.course-item-thumb.t2 { background: var(--gradient-card-2); }
.course-item-thumb.t3 { background: linear-gradient(135deg, #1e88ff, #0a4dad); }
.course-item-thumb.t4 { background: linear-gradient(135deg, #00d4ff, #1e88ff); }
.course-item-thumb.t5 { background: linear-gradient(135deg, #1565c0, #0a4dad); }
.course-item-thumb.t6 { background: linear-gradient(135deg, #0a4dad, #1e3a5f); }
.course-item-thumb.t7 { background: linear-gradient(135deg, #00d4ff, #1565c0); }
.course-item-thumb.t8 { background: var(--gradient-course); }

.course-item-body {
  flex: 1;
  min-width: 0;
}

.course-item-title {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-primary);
  margin-bottom: 6px;
}

.course-item-meta {
  font-size: 12px;
  color: var(--color-text-secondary);
  margin-bottom: 6px;
}

.course-item-progress {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
}

.course-item-progress .label {
  color: var(--color-text-secondary);
}

.course-item-progress .percent {
  font-weight: 500;
}

.course-item-progress .percent.success { color: var(--color-success); }
.course-item-progress .percent.warning { color: var(--color-warning); }

.course-item-progress .progress-bar {
  flex: 1;
  max-width: 200px;
}

/* 我的课程页面 - Tab 导航 */
.my-courses-tabs {
  display: flex;
  gap: 0;
  border-bottom: 2px solid var(--color-border);
  margin-bottom: 20px;
}

.mc-tab {
  padding: 10px 24px;
  border: none;
  background: none;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all 0.2s;
  position: relative;
  margin-bottom: -2px;
}

.mc-tab:hover {
  color: var(--color-primary);
}

.mc-tab.active {
  color: var(--color-primary);
  border-bottom: 2px solid var(--color-primary);
}

.mc-tab-count {
  font-size: 12px;
  color: var(--color-text-muted);
  margin-left: 2px;
}

.mc-tab.active .mc-tab-count {
  color: var(--color-primary);
}

/* Tab 面板 */
.mc-panel {
  display: none;
}

.mc-panel.active {
  display: block;
}

/* 收藏图标 */
.course-fav {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: #ccc;
  cursor: pointer;
  transition: all 0.2s;
  border-radius: 50%;
}

.course-fav:hover {
  color: var(--color-warning);
  background: rgba(255, 167, 38, 0.1);
}

.course-fav.favorited {
  color: #ffb300;
}

/* 分页 */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 6px;
  padding: 16px 0;
}

.page-btn {
  min-width: 32px;
  height: 32px;
  padding: 0 10px;
  border-radius: var(--radius-sm);
  background: #fff;
  border: 1px solid var(--color-border);
  color: var(--color-text-primary);
  font-size: 13px;
  cursor: pointer;
  transition: all 0.2s;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.page-btn:hover:not(:disabled) {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.page-btn.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

.page-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.page-ellipsis {
  color: var(--color-text-muted);
  padding: 0 4px;
}

/* ===========================
   10. 新闻页
   =========================== */
.news-tabs {
  display: flex;
  gap: 32px;
  background: #fff;
  padding: 0 24px;
  border-radius: var(--radius-md) var(--radius-md) 0 0;
  border-bottom: 1px solid var(--color-border-light);
  margin-bottom: 0;
}

.news-tab {
  padding: 16px 0;
  font-size: 14px;
  color: var(--color-text-secondary);
  cursor: pointer;
  position: relative;
}

.news-tab:hover {
  color: var(--color-primary);
}

.news-tab.active {
  color: var(--color-primary);
  font-weight: 500;
}

.news-tab.active::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 50%;
  transform: translateX(-50%);
  width: 24px;
  height: 2px;
  background: var(--color-primary);
  border-radius: 2px;
}

.news-list {
  background: #fff;
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  padding: 16px 24px;
  box-shadow: var(--shadow-sm);
}

.news-item {
  display: flex;
  gap: 20px;
  padding: 20px 0;
  border-bottom: 1px solid var(--color-border-light);
}

.news-item:last-child {
  border-bottom: none;
}

.news-thumb {
  width: 160px;
  height: 100px;
  border-radius: var(--radius-md);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.5);
  font-size: 28px;
}

.news-thumb.nt1 { background: var(--gradient-card-1); }
.news-thumb.nt2 { background: var(--gradient-card-2); }
.news-thumb.nt3 { background: linear-gradient(135deg, #1565c0, #0a4dad); }
.news-thumb.nt4 { background: linear-gradient(135deg, #00d4ff, #1e88ff); }
.news-thumb.nt5 { background: linear-gradient(135deg, #1e88ff, #0a4dad); }
.news-thumb.nt6 { background: linear-gradient(135deg, #0a4dad, #1e3a5f); }

.news-body {
  flex: 1;
  min-width: 0;
}

.news-title {
  font-size: 16px;
  font-weight: 500;
  color: var(--color-text-primary);
  margin-bottom: 8px;
}

.news-desc {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: 12px;
}

.news-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 12px;
  color: var(--color-text-secondary);
}

.news-meta span {
  display: flex;
  align-items: center;
  gap: 4px;
}

.news-tag {
  margin-left: auto;
  padding: 2px 8px;
  background: var(--color-primary-light);
  color: var(--color-primary);
  border-radius: 3px;
  font-size: 12px;
}

/* ===========================
   10b. 新闻详情页
   =========================== */
.news-detail-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 20px;
  align-items: start;
}

/* ===== 文章主体 ===== */
.news-detail-main {
  background: #fff;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.news-detail-header {
  padding: 28px 32px 0;
}

.news-detail-tag {
  display: inline-block;
  padding: 4px 12px;
  background: var(--color-primary-light);
  color: var(--color-primary);
  font-size: 12px;
  font-weight: 500;
  border-radius: var(--radius-sm);
  margin-bottom: 14px;
}

.news-detail-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-text-primary);
  line-height: 1.4;
  margin-bottom: 16px;
}

.news-detail-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--color-border-light);
}

.meta-left {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.meta-author {
  display: flex;
  align-items: center;
  gap: 8px;
}

.meta-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--gradient-card-2);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 600;
  flex-shrink: 0;
}

.meta-author-info {
  display: flex;
  flex-direction: column;
}

.meta-author-name {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text-primary);
  line-height: 1.2;
}

.meta-author-role {
  font-size: 11px;
  color: var(--color-text-muted);
}

.meta-divider {
  color: var(--color-border);
  font-size: 12px;
}

.meta-date,
.meta-views {
  font-size: 13px;
  color: var(--color-text-secondary);
}

/* ===== 封面图 ===== */
.news-detail-cover {
  margin: 20px 32px 0;
  border-radius: var(--radius-md);
  overflow: hidden;
}

.news-detail-cover-inner {
  width: 100%;
  height: 260px;
  position: relative;
  display: flex;
  align-items: flex-end;
  padding: 20px;
}

.cover-badge {
  display: inline-block;
  padding: 4px 10px;
  background: rgba(255,255,255,0.2);
  backdrop-filter: blur(4px);
  color: #fff;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 1px;
  border-radius: var(--radius-sm);
}

/* ===== 正文 ===== */
.news-detail-body {
  padding: 24px 32px 8px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text-primary);
}

.news-detail-lead {
  font-size: 16px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  padding: 16px 20px;
  background: var(--color-primary-bg);
  border-left: 3px solid var(--color-primary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin-bottom: 24px;
}

.news-detail-body h2 {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text-primary);
  margin: 28px 0 14px;
}

.news-detail-body p {
  margin-bottom: 14px;
}

.news-detail-body ul {
  margin: 0 0 14px 20px;
  padding-left: 4px;
}

.news-detail-body li {
  margin-bottom: 8px;
  line-height: 1.7;
}

.news-detail-body strong {
  color: var(--color-text-primary);
  font-weight: 600;
}

.news-detail-body code {
  padding: 2px 6px;
  background: var(--color-border-light);
  border-radius: var(--radius-sm);
  font-size: 13px;
  color: var(--color-primary-dark);
  font-family: 'Courier New', monospace;
}

.news-detail-body img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  margin: 16px 0;
}

.news-detail-quote {
  margin: 24px 0;
  padding: 16px 24px;
  background: var(--color-primary-bg);
  border-left: 4px solid var(--color-primary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 15px;
  color: var(--color-text-secondary);
  font-style: italic;
  line-height: 1.7;
}

/* ===== 上一篇/下一篇 ===== */
.news-detail-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  padding: 20px 32px;
  border-top: 1px solid var(--color-border-light);
  margin-top: 8px;
}

.news-nav-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 14px 16px;
  background: var(--color-bg);
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: all 0.2s;
}

.news-nav-item:hover {
  background: var(--color-primary-light);
}

.news-nav-item.disabled {
  opacity: 0.5;
  pointer-events: none;
}

.news-nav-item.next {
  text-align: right;
}

.news-nav-label {
  font-size: 12px;
  color: var(--color-text-muted);
}

.news-nav-title {
  font-size: 14px;
  color: var(--color-text-primary);
  font-weight: 500;
  line-height: 1.4;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ===== 返回列表 ===== */
.news-detail-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin: 0 32px 24px;
  padding: 8px 16px;
  color: var(--color-text-secondary);
  font-size: 13px;
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: all 0.2s;
}

.news-detail-back:hover {
  color: var(--color-primary);
  background: var(--color-primary-light);
}

/* ===== 右侧栏 ===== */
.news-detail-sidebar {
  display: flex;
  flex-direction: column;
  gap: 16px;
  position: sticky;
  top: 16px;
}

.sidebar-card {
  background: #fff;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.sidebar-card-title {
  padding: 14px 18px;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text-primary);
  border-bottom: 1px solid var(--color-border-light);
  margin: 0;
}

/* ===== 相关新闻 ===== */
.related-news {
  padding: 8px 18px 14px;
}

.related-news-item {
  display: flex;
  gap: 12px;
  padding: 10px 0;
  text-decoration: none;
  border-bottom: 1px solid var(--color-border-light);
}

.related-news-item:last-child {
  border-bottom: none;
}

.related-news-thumb {
  width: 60px;
  height: 40px;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}

.related-news-body {
  flex: 1;
  min-width: 0;
}

.related-news-title {
  font-size: 13px;
  color: var(--color-text-primary);
  line-height: 1.4;
  margin-bottom: 4px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: color 0.2s;
}

.related-news-item:hover .related-news-title {
  color: var(--color-primary);
}

.related-news-date {
  font-size: 11px;
  color: var(--color-text-muted);
}

/* ===== 新闻分类 ===== */
.news-category-list {
  padding: 8px 18px 14px;
}

.news-category-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 0;
  font-size: 13px;
  color: var(--color-text-secondary);
  text-decoration: none;
  border-bottom: 1px solid var(--color-border-light);
  transition: color 0.2s;
}

.news-category-item:last-child {
  border-bottom: none;
}

.news-category-item:hover {
  color: var(--color-primary);
}

.news-category-item.active {
  color: var(--color-primary);
  font-weight: 600;
}

.category-count {
  font-size: 12px;
  color: var(--color-text-muted);
  background: var(--color-bg);
  padding: 1px 8px;
  border-radius: 10px;
}

.news-category-item.active .category-count {
  background: var(--color-primary-light);
  color: var(--color-primary);
}

/* ===== 热门阅读 ===== */
.hot-news-list {
  padding: 8px 18px 14px;
}

.hot-news-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 0;
  text-decoration: none;
  border-bottom: 1px solid var(--color-border-light);
}

.hot-news-item:last-child {
  border-bottom: none;
}

.hot-news-rank {
  width: 18px;
  height: 18px;
  border-radius: var(--radius-sm);
  background: var(--color-border-light);
  color: var(--color-text-muted);
  font-size: 11px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 1px;
}

.hot-news-item:nth-child(1) .hot-news-rank {
  background: #ff5252;
  color: #fff;
}

.hot-news-item:nth-child(2) .hot-news-rank {
  background: #ff9800;
  color: #fff;
}

.hot-news-item:nth-child(3) .hot-news-rank {
  background: #ffc107;
  color: #fff;
}

.hot-news-title {
  flex: 1;
  font-size: 13px;
  color: var(--color-text-primary);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: color 0.2s;
}

.hot-news-item:hover .hot-news-title {
  color: var(--color-primary);
}

.hot-news-views {
  font-size: 11px;
  color: var(--color-text-muted);
  flex-shrink: 0;
  margin-top: 1px;
}

/* ===========================
   11. 知识库
   =========================== */
.kb-search {
  background: #fff;
  border-radius: var(--radius-md);
  padding: 16px;
  display: flex;
  gap: 12px;
  margin-bottom: 16px;
  box-shadow: var(--shadow-sm);
  align-items: center;
}

.kb-search .select-wrap {
  flex-shrink: 0;
}

.kb-search .search-input-wrap {
  flex: 1;
}

.kb-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.kb-tab {
  padding: 6px 16px;
  border-radius: 20px;
  background: #fff;
  border: 1px solid var(--color-border);
  font-size: 13px;
  color: var(--color-text-primary);
  cursor: pointer;
  transition: all 0.2s;
}

.kb-tab:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.kb-tab.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

.kb-list {
  background: #fff;
  border-radius: var(--radius-md);
  padding: 8px 24px;
  box-shadow: var(--shadow-sm);
}

.kb-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px 0;
  border-bottom: 1px solid var(--color-border-light);
  cursor: pointer;
}

.kb-item:hover {
  background: #fafbfc;
}

.kb-item:last-child {
  border-bottom: none;
}

.kb-file-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: var(--color-primary-light);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
  overflow: hidden;
}

.kb-file-icon-img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
}

.kb-body {
  flex: 1;
  min-width: 0;
}

.kb-title {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text-primary);
  margin-bottom: 6px;
}

.kb-desc {
  font-size: 13px;
  color: var(--color-text-secondary);
  margin-bottom: 8px;
}

.kb-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 12px;
  color: var(--color-text-muted);
}

.kb-meta span {
  display: flex;
  align-items: center;
  gap: 4px;
}

.kb-file-tag {
  padding: 1px 6px;
  background: #f0f3f7;
  border-radius: 3px;
  font-size: 11px;
  color: var(--color-text-secondary);
}

.kb-file-size {
  color: var(--color-text-muted);
  font-size: 12px;
}

.kb-download {
  color: var(--color-primary);
  font-size: 13px;
  cursor: pointer;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 4px;
}

.kb-download:hover {
  text-decoration: underline;
}

/* ===========================
   11-2. 知识库详情页
   =========================== */

/* 知识库详情页头部 */
.kb-detail-header {
  padding: 32px 40px 20px;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 20px;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 20px;
}

.kb-detail-title-wrap {
  flex: 1;
  min-width: 0;
}

.kb-detail-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.4;
  margin: 0 0 12px;
}

.kb-detail-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--color-text-muted);
  flex-wrap: wrap;
}

.kb-detail-meta .meta-divider {
  color: var(--color-border);
  font-size: 12px;
}

.kb-detail-actions {
  display: flex;
  gap: 10px;
  margin-top: 4px;
  flex-shrink: 0;
}

.kb-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 18px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: #fff;
  color: var(--color-text-secondary);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s ease;
  text-decoration: none;
}

.kb-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.kb-btn-primary {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

.kb-btn-primary:hover {
  background: #1a7ae8;
  color: #fff;
  opacity: 0.92;
}

/* 文档信息表 */
.kb-detail-info {
  margin: 24px 32px 0;
  background: var(--color-bg, #f7f8fa);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px 24px;
}

.kb-detail-info-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  margin: 0 0 14px;
}

.kb-info-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px 24px;
}

.kb-info-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.kb-info-label {
  font-size: 12px;
  color: var(--color-text-muted);
}

.kb-info-value {
  font-size: 13px;
  font-weight: 500;
  color: var(--color-text);
}

.kb-info-value a {
  color: var(--color-primary);
  text-decoration: none;
}

.kb-info-value a:hover {
  text-decoration: underline;
}

/* 相关文档 */
.kb-related-list {
  display: flex;
  flex-direction: column;
  padding: 0 18px;
}

.kb-related-item {
  display: flex;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--color-border-light, #f0f2f5);
  text-decoration: none;
}

.kb-related-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.kb-related-item:first-child {
  padding-top: 4px;
}

.kb-related-icon {
  width: 34px;
  height: 38px;
  flex-shrink: 0;
  background: #f5f8ff;
  border: 1px solid #e3ecff;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 5px;
}

.kb-related-icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.kb-related-body {
  flex: 1;
  min-width: 0;
}

.kb-related-title {
  font-size: 13px;
  font-weight: 500;
  color: var(--color-text);
  line-height: 1.45;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.kb-related-item:hover .kb-related-title {
  color: var(--color-primary);
}

.kb-related-meta {
  font-size: 11px;
  color: var(--color-text-muted);
  margin-top: 4px;
}

/* Toast 提示 */
.kb-toast {
  position: fixed;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%) translateY(16px);
  background: rgba(17, 24, 39, 0.9);
  color: #fff;
  font-size: 13px;
  padding: 10px 22px;
  border-radius: 20px;
  opacity: 0;
  pointer-events: none;
  transition: all 0.25s ease;
  z-index: 999;
}

.kb-toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* 知识库详情页响应式 */
@media (max-width: 768px) {
  .kb-detail-header {
    flex-direction: column;
    padding: 20px;
  }
  .kb-info-grid {
    grid-template-columns: 1fr 1fr;
  }
  .kb-detail-actions {
    flex-wrap: wrap;
  }
  .kb-detail-info {
    margin-left: 20px;
    margin-right: 20px;
  }
}

/* ===========================
   12. 响应式
   =========================== */
@media (max-width: 1280px) {
  .course-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .stats-row {
    grid-template-columns: repeat(3, 1fr);
  }
  .stat-card:nth-child(3) {
    border-right: none;
  }
}

@media (max-width: 1024px) {
  .home-row {
    grid-template-columns: 1fr;
  }
  .course-list {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .login-page {
    flex-direction: column;
  }
  .login-brand {
    padding: 40px 20px;
  }
  .login-logo {
    font-size: 60px;
  }
  .login-tagline {
    font-size: 20px;
  }
  .login-form-wrapper {
    padding: 30px 20px;
  }
  .course-grid {
    grid-template-columns: 1fr;
  }
  .info-grid {
    grid-template-columns: 1fr;
  }
  .stats-row {
    grid-template-columns: repeat(2, 1fr);
  }
  .stat-card {
    border-right: none;
    border-bottom: 1px solid var(--color-border-light);
    padding: 12px 0;
  }
  .course-header {
    flex-direction: column;
    align-items: flex-start;
  }
  .course-thumb {
    width: 100%;
  }
  .news-item {
    flex-direction: column;
  }
  .news-thumb {
    width: 100%;
    height: 140px;
  }
}

/* ===========================
   我的能力页面
   =========================== */

/* 总览卡片 */
.capability-overview {
  background: var(--gradient-card-1);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  box-shadow: var(--shadow-md);
}

.capability-overview-left {
  display: flex;
  align-items: center;
  gap: 14px;
}

.capability-avatar {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: rgba(255,255,255,0.2);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  font-weight: 600;
  flex-shrink: 0;
}

.capability-user-name {
  font-size: 18px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 4px;
}

.capability-user-role {
  font-size: 13px;
  color: rgba(255,255,255,0.7);
}

.capability-overview-stats {
  display: flex;
  align-items: center;
  gap: 24px;
}

.cap-stat {
  text-align: center;
}

.cap-stat-value {
  font-size: 28px;
  font-weight: 700;
  line-height: 1.1;
}

.cap-stat-label {
  font-size: 12px;
  color: rgba(255,255,255,0.7);
  margin-top: 4px;
}

.cap-stat-divider {
  width: 1px;
  height: 36px;
  background: rgba(255,255,255,0.15);
}

/* 图表行 */
.cap-chart-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 16px;
}

.cap-chart-card {
  background: #fff;
  border-radius: var(--radius-md);
  padding: 20px;
  box-shadow: var(--shadow-sm);
}

.cap-card-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: 16px;
}

/* 雷达图 */
.cap-radar-wrap {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 8px;
}

.cap-radar {
  width: 100%;
  max-width: 360px;
  height: auto;
}

/* 能力分项条形图 */
.cap-bars {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.cap-bar-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.cap-bar-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.cap-bar-name {
  font-size: 13px;
  font-weight: 500;
  color: var(--color-text-primary);
}

.cap-bar-score {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-primary);
}

.cap-bar-track {
  height: 8px;
  background: #f0f3f7;
  border-radius: 4px;
  overflow: hidden;
}

.cap-bar-fill {
  height: 100%;
  border-radius: 4px;
  transition: width 0.6s ease;
}

/* 环形图 */
.cap-donut-wrap {
  display: flex;
  align-items: center;
  gap: 24px;
  justify-content: center;
  padding: 8px;
}

.cap-donut {
  width: 180px;
  height: 180px;
  flex-shrink: 0;
}

.cap-donut-legend {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.cap-legend-item {
  display: flex;
  align-items: center;
  gap: 8px;
}

.cap-legend-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

.cap-legend-label {
  font-size: 13px;
  color: var(--color-text-secondary);
}

.cap-legend-value {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-text-primary);
}

/* 课程进度列表 */
.cap-progress-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-height: 320px;
  overflow-y: auto;
}

.cap-progress-item {
  display: flex;
  align-items: center;
  gap: 12px;
}

.cap-progress-info {
  flex: 1;
  min-width: 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.cap-progress-name {
  font-size: 13px;
  color: var(--color-text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.cap-progress-percent {
  font-size: 13px;
  font-weight: 600;
  flex-shrink: 0;
  margin-left: 8px;
}

.cap-progress-track {
  width: 100px;
  height: 6px;
  background: #f0f3f7;
  border-radius: 3px;
  overflow: hidden;
  flex-shrink: 0;
}

.cap-progress-fill {
  height: 100%;
  border-radius: 3px;
  transition: width 0.6s ease;
}

.cap-progress-tag {
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 10px;
  flex-shrink: 0;
  white-space: nowrap;
}

.cap-progress-tag.tag-done {
  background: var(--color-success-light);
  color: var(--color-success);
}

.cap-progress-tag.tag-progress {
  background: var(--color-warning-light);
  color: var(--color-warning);
}

/* 能力-课程映射 */
.cap-mapping-card {
  background: #fff;
  border-radius: var(--radius-md);
  padding: 20px;
  box-shadow: var(--shadow-sm);
  margin-bottom: 16px;
}

.cap-mapping-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.cap-map-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px;
  border-radius: var(--radius-sm);
  background: #f8f9fb;
  transition: all 0.2s;
}

.cap-map-item:hover {
  background: #f0f5fa;
  transform: translateY(-1px);
}

.cap-map-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.cap-map-body {
  flex: 1;
  min-width: 0;
}

.cap-map-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: 4px;
}

.cap-map-score {
  font-size: 12px;
  font-weight: 500;
  color: var(--color-primary);
  margin-left: 4px;
}

.cap-map-courses {
  font-size: 12px;
  color: var(--color-text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* 响应式 */
@media (max-width: 1024px) {
  .cap-chart-row {
    grid-template-columns: 1fr;
  }
  .cap-mapping-grid {
    grid-template-columns: 1fr;
  }
  .capability-overview {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }
  .capability-overview-stats {
    flex-wrap: wrap;
    justify-content: center;
  }
}

/* ===========================
   帮助与反馈页面
   =========================== */

.help-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 16px;
}

.help-form-card,
.help-history-card,
.help-faq-card {
  background: #fff;
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
}

.help-card-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: 8px;
}

.help-card-desc {
  font-size: 13px;
  color: var(--color-text-muted);
  margin-bottom: 20px;
}

/* 表单 */
.help-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-label {
  font-size: 13px;
  font-weight: 500;
  color: var(--color-text-secondary);
}

.required {
  color: var(--color-danger);
}

.form-input,
.form-textarea,
.form-select {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  font-size: 14px;
  font-family: var(--font-family);
  color: var(--color-text-primary);
  background: #fff;
  transition: border-color 0.2s;
  outline: none;
  padding-left: 42px;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(30,136,255,0.1);
}

.form-textarea {
  resize: vertical;
  min-height: 100px;
  line-height: 1.6;
}

.form-row {
  display: flex;
  gap: 12px;
}

.form-group-half {
  flex: 1;
}

/* 单选 */
.form-radio-group {
  display: flex;
  gap: 20px;
}

.form-radio {
  display: flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  font-size: 14px;
  color: var(--color-text-primary);
}

.form-radio input[type="radio"] {
  display: none;
}

.radio-custom {
  width: 16px;
  height: 16px;
  border: 2px solid var(--color-border);
  border-radius: 50%;
  position: relative;
  transition: all 0.2s;
}

.form-radio input[type="radio"]:checked + .radio-custom {
  border-color: var(--color-primary);
}

.form-radio input[type="radio"]:checked + .radio-custom::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-primary);
}

/* 按钮 */
.form-actions {
  display: flex;
  gap: 12px;
  justify-content: flex-end;
  margin-top: 4px;
}

.btn-reset {
  padding: 10px 24px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: #fff;
  color: var(--color-text-secondary);
  font-size: 14px;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-reset:hover {
  border-color: var(--color-text-muted);
  color: var(--color-text-primary);
}

.btn-submit {
  padding: 10px 28px;
  border: none;
  border-radius: var(--radius-sm);
  background: var(--color-primary);
  color: #fff;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-submit:hover {
  background: var(--color-primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(30,136,255,0.3);
}

/* 反馈记录列表 */
.help-history-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.help-history-header .help-card-title {
  margin-bottom: 0;
}

.help-history-filter {
  display: flex;
  gap: 4px;
}

.hf-tab {
  padding: 5px 14px;
  border: 1px solid var(--color-border);
  border-radius: 14px;
  background: #fff;
  color: var(--color-text-secondary);
  font-size: 12px;
  cursor: pointer;
  transition: all 0.2s;
}

.hf-tab:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.hf-tab.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

.help-feedback-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-height: 600px;
  overflow-y: auto;
  padding-right: 4px;
}

.feedback-item {
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-sm);
  padding: 14px;
  transition: all 0.2s;
}

.feedback-item:hover {
  border-color: var(--color-primary-light);
  box-shadow: var(--shadow-sm);
}

.feedback-item-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

.feedback-type-badge {
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 10px;
  font-weight: 500;
}

.feedback-type-badge.type-bug {
  background: #fee2e2;
  color: #dc2626;
}

.feedback-type-badge.type-suggestion {
  background: #dbeafe;
  color: #2563eb;
}

.feedback-type-badge.type-other {
  background: #f3f4f6;
  color: #6b7280;
}

.feedback-status {
  font-size: 12px;
  padding: 3px 10px;
  border-radius: 12px;
  font-weight: 500;
}

.feedback-status.status-pending {
  background: var(--color-warning-light);
  color: #b45309;
}

.feedback-status.status-resolved {
  background: var(--color-success-light);
  color: #047857;
}

.feedback-item-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: 6px;
}

.feedback-item-desc {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.5;
  margin-bottom: 8px;
}

.feedback-item-meta {
  display: flex;
  align-items: center;
  gap: 12px;
}

.feedback-priority {
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 10px;
}

.feedback-priority.priority-low {
  background: #f3f4f6;
  color: #9ca3af;
}

.feedback-priority.priority-normal {
  background: #e0f2fe;
  color: #0284c7;
}

.feedback-priority.priority-high {
  background: #fef3c7;
  color: #b45309;
}

.feedback-priority.priority-urgent {
  background: #fee2e2;
  color: #dc2626;
}

.feedback-time {
  font-size: 12px;
  color: var(--color-text-muted);
}

.feedback-reply {
  margin-top: 10px;
  padding: 10px 12px;
  background: #f8f9fb;
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--color-success);
}

.feedback-reply-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--color-success);
  margin-bottom: 4px;
}

.feedback-reply-content {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

.feedback-reply-time {
  font-size: 11px;
  color: var(--color-text-muted);
  margin-top: 6px;
}

/* 空状态 */
.feedback-empty {
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 48px 0;
  color: var(--color-text-muted);
}

.feedback-empty-icon {
  font-size: 40px;
  margin-bottom: 12px;
}

/* FAQ */
.help-faq-card {
  margin-bottom: 16px;
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.faq-item {
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.faq-q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-primary);
  transition: background 0.2s;
}

.faq-q:hover {
  background: #f8f9fb;
}

.faq-q-icon {
  font-size: 18px;
  color: var(--color-text-muted);
  flex-shrink: 0;
}

.faq-a {
  max-height: 0;
  overflow: hidden;
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.6;
  transition: max-height 0.3s ease;
  padding: 0 16px;
}

.faq-item.open .faq-a {
  padding-bottom: 14px;
}

/* Toast */
.feedback-toast {
  position: fixed;
  top: 80px;
  left: 50%;
  transform: translateX(-50%) translateY(-20px);
  background: #fff;
  border-radius: var(--radius-md);
  padding: 14px 24px;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 10px;
  opacity: 0;
  pointer-events: none;
  transition: all 0.3s ease;
  z-index: 9999;
}

.feedback-toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.toast-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--color-success);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
}

.toast-text {
  font-size: 14px;
  color: var(--color-text-primary);
}

/* 响应式 */
@media (max-width: 1024px) {
  .help-layout {
    grid-template-columns: 1fr;
  }
  .news-detail-layout {
    grid-template-columns: 1fr;
  }
  .news-detail-sidebar {
    position: static;
  }
}

@media (max-width: 768px) {
  .news-detail-header,
  .news-detail-body,
  .news-detail-nav {
    padding-left: 20px;
    padding-right: 20px;
  }
  .news-detail-cover {
    margin-left: 20px;
    margin-right: 20px;
  }
  .news-detail-cover-inner {
    height: 180px;
  }
  .news-detail-title {
    font-size: 20px;
  }
  .news-detail-nav {
    grid-template-columns: 1fr;
  }
  .news-nav-item.next {
    text-align: left;
  }
  .news-detail-back {
    margin-left: 20px;
  }
  .news-detail-meta {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }
}

/* ===========================
   课程播放页
   =========================== */
.play-layout {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 20px;
  margin-bottom: 24px;
}

.play-main {
  min-width: 0;
}

.video-player-wrap {
  background: #000;
  border-radius: var(--radius-md);
  overflow: hidden;
  aspect-ratio: 16 / 9;
}

.video-player {
  width: 100%;
  height: 100%;
  display: block;
}

.video-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
  color: rgba(255,255,255,0.6);
}

.video-placeholder-icon {
  margin-bottom: 16px;
  opacity: 0.4;
}

.video-placeholder-text {
  font-size: 16px;
  font-weight: 500;
  margin-bottom: 8px;
}

.video-placeholder-sub {
  font-size: 13px;
  opacity: 0.6;
}

.play-section-info {
  background: #fff;
  border-radius: var(--radius-md);
  padding: 20px;
  margin-top: 16px;
}

.play-section-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 16px;
}

.play-chapter-label {
  font-size: 12px;
  color: var(--color-primary);
  background: var(--color-primary-light);
  padding: 2px 10px;
  border-radius: 10px;
  display: inline-block;
  margin-bottom: 8px;
}

.play-section-title {
  font-size: 20px;
  font-weight: 600;
  color: var(--color-text-primary);
  margin: 0;
  line-height: 1.4;
}

.play-section-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.play-duration {
  font-size: 13px;
  color: var(--color-text-secondary);
}

.play-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 16px;
  border-top: 1px solid var(--color-border);
}

.play-nav-buttons {
  display: flex;
  gap: 8px;
}

/* 播放页侧边栏 */
.play-sidebar {
  background: #fff;
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  max-height: calc(100vh - 140px);
  position: sticky;
  top: 80px;
}

.play-sidebar-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px;
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
}

.play-sidebar-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text-primary);
  margin: 0;
}

.play-sidebar-link {
  font-size: 12px;
  color: var(--color-primary);
  text-decoration: none;
}

.play-sidebar-link:hover {
  text-decoration: underline;
}

.play-sidebar-list {
  overflow-y: auto;
  flex: 1;
  padding: 8px 0;
}

.play-chapter-group {
  margin-bottom: 4px;
}

.play-chapter-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text-primary);
  padding: 10px 16px 6px;
}

.play-section-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 16px;
  text-decoration: none;
  color: var(--color-text-secondary);
  font-size: 13px;
  transition: all 0.15s;
}

.play-section-link:hover {
  background: #f5f7fa;
  color: var(--color-text-primary);
}

.play-section-link.active {
  background: var(--color-primary-light);
  color: var(--color-primary);
  font-weight: 500;
}

.play-section-link.completed {
  color: var(--color-success);
}

.play-section-index {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: #f0f3f7;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 600;
  flex-shrink: 0;
  color: var(--color-text-muted);
}

.play-section-link.active .play-section-index {
  background: var(--color-primary);
  color: #fff;
}

.play-section-link.completed .play-section-index {
  background: var(--color-success);
  color: #fff;
}

.play-section-name {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.play-section-duration {
  font-size: 12px;
  color: var(--color-text-muted);
  flex-shrink: 0;
}

.play-section-check {
  font-size: 12px;
  color: var(--color-success);
  flex-shrink: 0;
}

/* 课程目录页可点击小节 */
.section-item.clickable {
  cursor: pointer;
  text-decoration: none;
  color: inherit;
  display: flex;
  align-items: center;
  transition: background 0.15s;
}

.section-item.clickable:hover {
  background: #f5f7fa;
}

.section-item.locked-item {
  display: flex;
  align-items: center;
  opacity: 0.7;
}

/* 播放页响应式 */
@media (max-width: 992px) {
  .play-layout {
    grid-template-columns: 1fr;
  }
  .play-sidebar {
    max-height: 400px;
    position: static;
  }
  .play-section-header {
    flex-direction: column;
  }
  .play-actions {
    flex-direction: column;
    gap: 12px;
    align-items: flex-start;
  }
}

/* ============================================================
   Learning Zone (学习专区)
   ============================================================ */
.lz-search {
  display: flex;
  gap: 10px;
  align-items: center;
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.lz-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}
.lz-tab {
  padding: 6px 18px;
  border-radius: 20px;
  border: 1px solid #dcdfe6;
  background: #fff;
  color: #606266;
  font-size: 14px;
  cursor: pointer;
  text-decoration: none;
  transition: all .2s;
}
.lz-tab:hover {
  color: #244e38;
  border-color: #244e38;
}
.lz-tab.active {
  background: #244e38;
  color: #fff;
  border-color: #244e38;
}
.lz-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 24px;
}
.lz-card {
  border-radius: 10px;
  overflow: hidden;
  background: #fff;
  box-shadow: 0 2px 8px rgba(0,0,0,.06);
  text-decoration: none;
  color: inherit;
  transition: transform .2s, box-shadow .2s;
}
.lz-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 6px 18px rgba(0,0,0,.1);
}
.lz-card-cover {
  height: 140px;
  position: relative;
  overflow: hidden;
  background: #f0f2f5;
}
.lz-card-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.lz-cover-icon {
  font-size: 48px;
  filter: drop-shadow(0 2px 4px rgba(0,0,0,.15));
}
.lz-card-title {
  padding: 14px 16px;
  font-size: 15px;
  font-weight: 600;
  color: #303133;
  text-align: center;
  line-height: 1.4;
}
/* Cover color variants */
.lz-cover-1 { background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); }
.lz-cover-2 { background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%); }
.lz-cover-3 { background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%); }
.lz-cover-4 { background: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%); }
.lz-cover-5 { background: linear-gradient(135deg, #fa709a 0%, #fee140 100%); }
.lz-cover-6 { background: linear-gradient(135deg, #a18cd1 0%, #fbc2eb 100%); }
.lz-cover-7 { background: linear-gradient(135deg, #fccb90 0%, #d57eeb 100%); }
.lz-cover-8 { background: linear-gradient(135deg, #e0c3fc 0%, #8ec5fc 100%); }

@media (max-width: 1200px) {
  .lz-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 768px) {
  .lz-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 480px) {
  .lz-grid { grid-template-columns: 1fr; }
}

/* 学习专区详情页 - 文件信息卡片 */
.lz-file-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px;
  background: #f8f9fb;
  border-radius: 10px;
  margin-top: 20px;
  border: 1px solid #ebeef5;
}
.lz-file-card-icon {
  flex-shrink: 0;
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.lz-file-card-icon img {
  max-width: 48px;
  max-height: 48px;
}
.lz-file-card-info {
  flex: 1;
  min-width: 0;
}
.lz-file-card-name {
  font-size: 15px;
  font-weight: 600;
  color: #303133;
  margin-bottom: 6px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.lz-file-card-meta {
  font-size: 13px;
  color: #909399;
}
.lz-file-card-meta .meta-divider {
  margin: 0 6px;
  color: #c0c4cc;
}
.lz-file-card-btn {
  flex-shrink: 0;
  padding: 8px 20px;
  background: #244e38;
  color: #fff;
  border-radius: 6px;
  text-decoration: none;
  font-size: 14px;
  transition: background .2s;
  white-space: nowrap;
}
.lz-file-card-btn:hover {
  background: #1a3d2a;
  color: #fff;
}
@media (max-width: 600px) {
  .lz-file-card { flex-wrap: wrap; }
  .lz-file-card-btn { width: 100%; text-align: center; }
}

/* ============================================
   课程测验 Quiz Styles
   ============================================ */
.quiz-header {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  border-radius: 12px;
  padding: 24px;
  color: #fff;
  margin-bottom: 24px;
}
.quiz-title {
  font-size: 20px;
  font-weight: 700;
  margin: 0 0 8px;
}
.quiz-desc {
  font-size: 14px;
  opacity: .85;
  margin: 0 0 12px;
}
.quiz-meta {
  display: flex;
  gap: 20px;
  font-size: 13px;
  opacity: .9;
}
.quiz-locked {
  text-align: center;
  padding: 60px 20px;
  background: #f8f9fa;
  border-radius: 12px;
  border: 2px dashed #dee2e6;
}
.quiz-locked-icon {
  font-size: 48px;
  margin-bottom: 16px;
}
.quiz-locked-text {
  font-size: 18px;
  font-weight: 600;
  color: #333;
  margin: 0 0 8px;
}
.quiz-locked-sub {
  font-size: 14px;
  color: #888;
  margin: 0;
}
.quiz-form {
  margin-top: 8px;
}
.quiz-q-item {
  background: #fff;
  border: 1px solid #e8e8e8;
  border-radius: 10px;
  padding: 20px;
  margin-bottom: 16px;
}
.quiz-q-item.quiz-correct {
  border-color: #52c41a;
  background: #f6ffed;
}
.quiz-q-item.quiz-wrong {
  border-color: #ff4d4f;
  background: #fff2f0;
}
.quiz-q-title {
  font-size: 15px;
  font-weight: 600;
  color: #333;
  margin-bottom: 14px;
  line-height: 1.6;
}
.quiz-q-score {
  font-size: 12px;
  font-weight: 400;
  color: #999;
  margin-left: 6px;
}
.quiz-option {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  margin-bottom: 8px;
  border: 1px solid #e8e8e8;
  border-radius: 8px;
  cursor: pointer;
  transition: all .2s;
  font-size: 14px;
  color: #333;
}
.quiz-option:hover {
  border-color: #667eea;
  background: #f5f3ff;
}
.quiz-option input[type="radio"],
.quiz-option input[type="checkbox"] {
  margin: 0;
  flex-shrink: 0;
}
.quiz-opt-label {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: #f0f0f0;
  font-weight: 600;
  font-size: 13px;
  color: #555;
  flex-shrink: 0;
}
.quiz-opt-text {
  flex: 1;
}
.quiz-option.quiz-opt-correct {
  border-color: #52c41a;
  background: #f6ffed;
}
.quiz-option.quiz-opt-correct .quiz-opt-label {
  background: #52c41a;
  color: #fff;
}
.quiz-option.quiz-opt-wrong {
  border-color: #ff4d4f;
  background: #fff2f0;
}
.quiz-option.quiz-opt-wrong .quiz-opt-label {
  background: #ff4d4f;
  color: #fff;
}
.quiz-opt-mark {
  color: #52c41a;
  font-weight: 700;
  font-size: 16px;
}
.quiz-analysis {
  margin-top: 12px;
  padding: 12px;
  background: #fffbe6;
  border: 1px solid #ffe58f;
  border-radius: 6px;
  font-size: 13px;
  color: #666;
  line-height: 1.6;
}
.quiz-submit-row {
  text-align: center;
  margin-top: 24px;
}
.quiz-submit-btn {
  display: inline-block;
  padding: 12px 40px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: transform .15s;
}
.quiz-submit-btn:hover {
  transform: translateY(-1px);
}
.quiz-result-card {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 32px;
  border-radius: 12px;
  margin-bottom: 16px;
}
.quiz-result-card.quiz-passed {
  background: linear-gradient(135deg, #f6ffed 0%, #d9f7be 100%);
  border: 2px solid #b7eb8f;
}
.quiz-result-card.quiz-failed {
  background: linear-gradient(135deg, #fff2f0 0%, #ffccc7 100%);
  border: 2px solid #ffa39e;
}
.quiz-result-icon {
  font-size: 48px;
  flex-shrink: 0;
}
.quiz-result-info h3 {
  font-size: 20px;
  margin: 0 0 8px;
  color: #333;
}
.quiz-result-score {
  font-size: 16px;
  font-weight: 600;
  color: #555;
}
.quiz-result-pass {
  font-size: 13px;
  color: #888;
  margin-top: 4px;
}
.quiz-retake-btn {
  padding: 10px 32px;
  background: #fff;
  border: 2px solid #667eea;
  color: #667eea;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all .2s;
}
.quiz-retake-btn:hover {
  background: #667eea;
  color: #fff;
}
.quiz-detail-list {
  margin-top: 20px;
}

/* 测验锁定状态进度条 */
.quiz-progress-info {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 20px;
  max-width: 400px;
  margin-left: auto;
  margin-right: auto;
}
.quiz-progress-bar {
  flex: 1;
  height: 8px;
  background: #e8e8e8;
  border-radius: 4px;
  overflow: hidden;
}
.quiz-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
  border-radius: 4px;
  transition: width .3s;
}
.quiz-progress-text {
  font-size: 13px;
  color: #666;
  white-space: nowrap;
}

/* ===========================
   我的考试页面
   =========================== */
.exam-stats {
  display: flex;
  gap: 16px;
  margin-bottom: 28px;
}
.exam-stat-card {
  flex: 1;
  background: var(--color-card);
  border-radius: var(--radius-lg);
  padding: 20px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border-light);
}
.exam-stat-num {
  font-size: 32px;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.2;
}
.exam-stat-label {
  font-size: 13px;
  color: var(--color-text-secondary);
  margin-top: 4px;
}

/* 考试列表 */
.exam-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 28px;
}
.exam-card {
  background: var(--color-card);
  border-radius: var(--radius-lg);
  padding: 18px 22px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border-light);
  transition: all 0.2s;
}
.exam-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}
.exam-card-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}
.exam-card-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text-primary);
}
.exam-card-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 4px;
  font-size: 13px;
  color: var(--color-text-secondary);
  margin-bottom: 8px;
}
.meta-dot {
  margin: 0 2px;
  color: var(--color-text-muted);
}
.exam-card-desc {
  font-size: 13px;
  color: var(--color-text-secondary);
  margin-bottom: 12px;
  line-height: 1.5;
}
.exam-card-footer {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  padding-top: 10px;
  border-top: 1px solid var(--color-border-light);
}

/* 类型徽章 */
.exam-type-badge {
  display: inline-block;
  font-size: 11px;
  padding: 2px 10px;
  border-radius: 10px;
  color: #fff;
  font-weight: 500;
  flex-shrink: 0;
}
.exam-type-badge.exam-badge {
  background: var(--color-primary);
}
.exam-type-badge.quiz-badge {
  background: var(--color-warning);
}

/* 状态标签 */
.exam-status {
  font-size: 12px;
  padding: 2px 10px;
  border-radius: 10px;
  font-weight: 500;
}
.exam-status.status-assigned { background: var(--color-warning-light); color: var(--color-warning); }
.exam-status.status-started { background: var(--color-primary-light); color: var(--color-primary); }
.exam-status.status-completed { background: var(--color-success-light); color: var(--color-success); }
.exam-status.status-success { background: var(--color-success-light); color: var(--color-success); }
.exam-status.status-danger { background: #fde8e8; color: var(--color-danger); }
.exam-status.status-warning { background: var(--color-warning-light); color: var(--color-warning); }

/* 得分和通过标签 */
.exam-score {
  font-size: 13px;
  color: var(--color-text-secondary);
  font-weight: 500;
}
.exam-pass-label {
  font-size: 12px;
  padding: 2px 8px;
  border-radius: 10px;
  font-weight: 500;
}
.exam-pass-label.pass { background: var(--color-success-light); color: var(--color-success); }
.exam-pass-label.fail { background: #fde8e8; color: var(--color-danger); }

/* 空状态 */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--color-text-muted);
  font-size: 14px;
}

/* 响应式 */
@media (max-width: 768px) {
  .exam-stats {
    flex-direction: column;
    gap: 10px;
  }
  .exam-card {
    padding: 14px 16px;
  }
}

/* ============================================================
   考试答题页面
   ============================================================ */

/* 进入考试按钮 */
.exam-enter-btn {
  display: inline-block;
  padding: 5px 16px;
  background: var(--color-primary);
  color: #fff;
  border-radius: var(--radius-md);
  font-size: 13px;
  font-weight: 500;
  text-decoration: none;
  transition: background 0.2s;
  margin-left: auto;
}
.exam-enter-btn:hover {
  background: var(--color-primary-dark);
  color: #fff;
  text-decoration: none;
}

/* 考试页面容器 */
.exam-page {
  max-width: 800px;
  margin: 0 auto;
}

/* 考试头部 */
.exam-header {
  background: var(--color-card);
  border-radius: var(--radius-lg);
  padding: 24px 28px;
  margin-bottom: 20px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border-light);
}
.exam-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: 10px;
}
.exam-info-bar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 4px;
  font-size: 13px;
  color: var(--color-text-secondary);
  margin-bottom: 8px;
}
.exam-desc {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.5;
  margin: 0;
}

/* 倒计时 */
.exam-timer {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--color-card);
  border-radius: var(--radius-lg);
  padding: 12px 22px;
  margin-bottom: 16px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border-light);
  display: flex;
  align-items: center;
  gap: 8px;
  justify-content: center;
  font-size: 18px;
  font-weight: 600;
  color: var(--color-primary);
}
.exam-timer.timer-warning {
  color: var(--color-danger);
  border-color: var(--color-danger);
  background: #fff5f5;
}
.timer-icon {
  font-size: 20px;
}

/* 题目卡片 */
.exam-questions {
  display: flex;
  flex-direction: column;
  gap: 18px;
  margin-bottom: 24px;
}
.exam-question-card {
  background: var(--color-card);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border-light);
}
.question-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
}
.question-num {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-text-primary);
}
.question-type-badge {
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 10px;
  background: var(--color-primary-light);
  color: var(--color-primary);
  font-weight: 500;
}
.question-score {
  font-size: 12px;
  color: var(--color-text-muted);
}
.question-text {
  font-size: 14px;
  color: var(--color-text-primary);
  line-height: 1.6;
  margin-bottom: 14px;
}

/* 选项 */
.question-options {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.option-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-light);
  cursor: pointer;
  transition: all 0.15s;
  font-size: 14px;
}
.option-item:hover {
  background: var(--color-bg);
  border-color: var(--color-primary);
}
.option-item input[type="radio"],
.option-item input[type="checkbox"] {
  accent-color: var(--color-primary);
  flex-shrink: 0;
}
.option-label {
  font-weight: 600;
  color: var(--color-text-secondary);
  min-width: 18px;
}
.option-text {
  color: var(--color-text-primary);
  line-height: 1.4;
}

/* 主观题输入 */
.subjective-answer {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 14px;
  line-height: 1.5;
  resize: vertical;
  font-family: inherit;
  color: var(--color-text-primary);
  background: var(--color-card);
}
.subjective-answer:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(59, 91, 213, 0.1);
}

/* 提交栏 */
.exam-submit-bar {
  text-align: center;
  padding: 20px 0 40px;
}
.exam-submit-btn {
  display: inline-block;
  padding: 12px 48px;
  background: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-md);
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
}
.exam-submit-btn:hover {
  background: var(--color-primary-dark);
}
.exam-submit-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* 考试结果 */
.exam-result {
  max-width: 500px;
  margin: 60px auto;
  text-align: center;
  background: var(--color-card);
  border-radius: var(--radius-lg);
  padding: 40px 30px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border-light);
}
.result-icon {
  font-size: 56px;
  margin-bottom: 16px;
}
.result-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: 20px;
}
.result-score {
  font-size: 18px;
  margin-bottom: 10px;
}
.result-value {
  font-size: 32px;
  font-weight: 700;
  color: var(--color-primary);
}
.result-total {
  font-size: 16px;
  color: var(--color-text-muted);
}
.result-pass {
  font-size: 14px;
  margin-bottom: 24px;
}
.result-pass.pass { color: var(--color-success); }
.result-pass.fail { color: var(--color-danger); }
.result-back-btn {
  display: inline-block;
  padding: 10px 32px;
  background: var(--color-primary);
  color: #fff;
  border-radius: var(--radius-md);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
}
.result-back-btn:hover {
  background: var(--color-primary-dark);
  color: #fff;
  text-decoration: none;
}

/* 考试页面响应式 */
@media (max-width: 768px) {
  .exam-header { padding: 16px 18px; }
  .exam-question-card { padding: 14px 16px; }
  .option-item { padding: 8px 10px; font-size: 13px; }
  .exam-submit-btn { padding: 10px 36px; font-size: 15px; }
  .exam-result { margin: 30px 16px; padding: 30px 20px; }
}