/* ================================================================
   MCL 组件样式库 - 所有可渲染组件的标准化样式
   ================================================================ */

/* ========== 1. 导航栏 Navbar ========== */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  width: 100%;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border-light);
  padding: 0 var(--space-xl);
}
.navbar-inner {
  max-width: var(--max-width-wide);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--navbar-height);
}
.navbar-logo {
  font-weight: 700;
  font-size: 1.4rem;
  color: var(--color-primary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}
.navbar-right {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}
.navbar-links {
  display: flex;
  gap: var(--space-xl);
  align-items: center;
  list-style: none;
  padding: 0;
  margin: 0;
}
.navbar-links li {
  margin-bottom: 0; /* 覆盖全局 li 的 margin-bottom */
}
.navbar-links a {
  text-decoration: none;
  color: var(--color-text-secondary);
  font-weight: 500;
  font-size: var(--text-sm);
  transition: color var(--transition-fast);
}
.navbar-links a:hover,
.navbar-links a.active {
  color: var(--color-primary);
}
.navbar-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--color-text);
  padding: var(--space-xs);
}
.navbar-mobile {
  display: none;
  background: var(--color-white);
  border-top: 1px solid var(--color-border-light);
  padding: var(--space-md);
}
.navbar-mobile a {
  display: block;
  padding: var(--space-sm) 0;
  color: var(--color-text-secondary);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition-fast);
}
.navbar-mobile a:hover,
.navbar-mobile a.active {
  color: var(--color-primary);
}

@media (max-width: 768px) {
  .navbar-links { display: none; }
  .navbar-toggle { display: block; }
  .navbar-mobile.open { display: block; }
}

/* ========== 1.5 主题切换按钮 ========== */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: transparent;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-full);
  cursor: pointer;
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  transition: all var(--transition-fast);
}
.theme-toggle:hover {
  background: var(--color-primary-light);
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: scale(1.05);
}
.theme-toggle:active {
  transform: scale(0.95);
}

/* ========== 2. Hero 区 ========== */
.hero {
  background: var(--gradient-hero);
  color: var(--color-text-inverse);
  padding: var(--space-4xl) 0;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -30%;
  right: -15%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, var(--color-primary-light) 0%, transparent 70%);
  border-radius: 50%;
  opacity: 0.6;
}
.hero .container {
  position: relative;
  z-index: 1;
}
.hero-badge {
  display: inline-block;
  background: var(--color-primary-light);
  border: 1px solid var(--color-primary-border);
  color: var(--color-primary);
  padding: 6px 16px;
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: var(--space-lg);
}
.hero-title {
  font-size: var(--text-5xl);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: var(--space-md);
  color: var(--color-text-inverse);
}
.hero-title .highlight {
  color: var(--color-primary);
}
.hero-subtitle {
  font-size: var(--text-xl);
  opacity: 0.85;
  max-width: 650px;
  margin-bottom: var(--space-xl);
  color: var(--color-text-inverse);
}
.hero-actions {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}
.hero .btn-outline {
  background: transparent;
  color: var(--color-text-inverse);
  border-color: rgba(255, 255, 255, 0.4);
}
.hero .btn-outline:hover {
  background: var(--color-text-inverse);
  color: var(--color-text);
}
.hero-stats {
  display: flex;
  gap: var(--space-2xl);
  margin-top: var(--space-3xl);
  padding-top: var(--space-xl);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}
.hero-stat-value {
  font-size: var(--text-4xl);
  font-weight: 800;
  color: var(--color-primary);
}
.hero-stat-label {
  font-size: var(--text-sm);
  opacity: 0.7;
  margin-top: var(--space-xs);
}

/* ========== 3. 面包屑 Breadcrumb ========== */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) 0;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  flex-wrap: wrap;
}
.breadcrumb a {
  color: var(--color-text-muted);
  text-decoration: none;
}
.breadcrumb a:hover {
  color: var(--color-primary);
}
.breadcrumb .separator {
  color: var(--color-border);
  user-select: none;
}
.breadcrumb .current {
  color: var(--color-text);
  font-weight: 500;
}

/* ========== 4. 文章头部 Article Header ========== */
.article-header {
  margin-bottom: var(--space-xl);
}
.article-title {
  font-size: var(--text-5xl);
  font-weight: 800;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: var(--space-md);
  line-height: 1.2;
}
.article-meta {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  flex-wrap: wrap;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  margin-bottom: var(--space-md);
}
.article-meta-item {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}
.article-tags {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}
.article-description {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  line-height: 1.7;
  background: var(--color-bg-alt);
  padding: var(--space-lg) var(--space-xl);
  border-radius: var(--radius-lg);
  margin-top: var(--space-lg);
}

/* ========== 5. 目录 Table of Contents ========== */
.toc {
  background: var(--color-bg);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  margin-bottom: var(--space-xl);
}
.toc-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  user-select: none;
}
.toc-title {
  font-size: var(--text-sm);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--color-text);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}
.toc-toggle {
  background: none;
  border: none;
  color: var(--color-text-muted);
  cursor: pointer;
  font-size: var(--text-sm);
  padding: 4px;
  transition: transform var(--transition-base);
  font-family: var(--font-sans);
}
.toc.collapsed .toc-toggle {
  transform: rotate(-90deg);
}
.toc-body {
  overflow: hidden;
  transition: max-height var(--transition-slow), opacity var(--transition-base), margin-top var(--transition-base);
  max-height: 2000px;
  opacity: 1;
  margin-top: var(--space-md);
}
.toc.collapsed .toc-body {
  max-height: 0;
  opacity: 0;
  margin-top: 0;
}
.toc-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.toc-list li {
  margin-bottom: var(--space-xs);
}
.toc-list a {
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  text-decoration: none;
  display: block;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}
.toc-list a:hover,
.toc-list a.active {
  color: var(--color-primary);
  background: var(--color-primary-light);
}
.toc-list .toc-h2 { padding-left: 0; font-weight: 600; }
.toc-list .toc-h3 { padding-left: var(--space-lg); }

/* ========== 6. 内容区块标题 Section Heading ========== */
.section-heading {
  font-size: var(--text-3xl);
  font-weight: 700;
  margin: 68px 0 24px;
  padding-left: var(--space-md);
  border-left: 4px solid var(--color-primary);
  line-height: 1.3;
}
.section-heading-sm {
  font-size: var(--text-2xl);
  font-weight: 600;
  margin: 42px 0 16px;
}

/* ========== 7. 卡片 Cards ========== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-xl);
  margin: var(--space-xl) 0;
}
.card-grid-2 { grid-template-columns: repeat(2, 1fr); }
.card-grid-3 { grid-template-columns: repeat(3, 1fr); }
.card-grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 768px) {
  .card-grid-2,
  .card-grid-3,
  .card-grid-4 { grid-template-columns: 1fr; }
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-xl);
  padding: var(--space-lg);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  box-shadow: var(--shadow-sm);
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
  border-color: var(--color-primary-border);
}
.card-icon {
  font-size: 2rem;
  margin-bottom: var(--space-md);
  color: var(--color-primary);
}
.card-icon-circle {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: var(--color-primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--color-primary);
  margin-bottom: var(--space-md);
}
.card-title {
  font-size: var(--text-xl);
  font-weight: 700;
  margin-bottom: var(--space-sm);
  color: var(--color-text);
}
.card-text {
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  line-height: 1.6;
}
.card-image {
  width: 100%;
  border-radius: var(--radius-md);
  margin-bottom: var(--space-md);
}
.card-footer {
  margin-top: var(--space-md);
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-border-light);
}

/* 水平卡片 */
.card-horizontal {
  display: flex;
  gap: var(--space-lg);
  align-items: center;
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-xl);
  padding: var(--space-lg);
  margin-bottom: var(--space-md);
}
.card-horizontal .card-icon-circle {
  flex-shrink: 0;
  margin-bottom: 0;
}
@media (max-width: 640px) {
  .card-horizontal {
    flex-direction: column;
    text-align: center;
  }
}

/* ========== 8. 选项卡 Tabs（LayUI 风格） ========== */
.tabs {
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  margin: var(--space-xl) 0;
  overflow: hidden;
}
.tabs-header {
  display: flex;
  gap: 0;
  padding: 0 var(--space-lg);
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  overflow-x: auto;
  position: relative;
  scrollbar-width: none;
  -ms-overflow-style: none;
}
.tabs-header::-webkit-scrollbar {
  display: none;
}
.tabs-btn {
  background: transparent;
  border: none;
  padding: 14px 20px;
  font-weight: 500;
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
  font-family: var(--font-sans);
  position: relative;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
}
.tabs-btn:hover {
  color: var(--color-primary);
}
.tabs-btn.active {
  color: var(--color-primary);
  font-weight: 600;
  border-bottom-color: var(--color-primary);
}
.tabs-content {
  padding: var(--space-lg);
}
.tabs-pane {
  display: none;
}
.tabs-pane.active {
  display: block;
}

/* ========== 9. 折叠卡片 Collapse Card ========== */
.collapse-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-xl);
  margin: var(--space-lg) 0;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.collapse-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) var(--space-lg);
  cursor: pointer;
  user-select: none;
  transition: background var(--transition-fast);
}
.collapse-card-header:hover {
  background: var(--color-bg-alt);
}
.collapse-card-title {
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--color-text);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}
.collapse-card-title > p {
  margin: 0;
  display: inline;
}
.collapse-card-icon {
  color: var(--color-primary);
  font-size: var(--text-lg);
}
.collapse-card-toggle {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: none;
  background: var(--color-bg-alt);
  color: var(--color-text-muted);
  cursor: pointer;
  font-size: var(--text-xs);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-base);
  flex-shrink: 0;
}
.collapse-card.open .collapse-card-toggle {
  transform: rotate(180deg);
  background: var(--color-primary-light);
  color: var(--color-primary);
}
.collapse-card-divider {
  height: 1px;
  background: var(--color-border-light);
  margin: 0 var(--space-lg);
}
.collapse-card-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-base);
}
.collapse-card.open .collapse-card-body {
  max-height: 2000px;
}
.collapse-card-content {
  padding: 0 var(--space-lg);
  opacity: 0;
  color: var(--color-text-secondary);
  line-height: 1.7;
  transition: opacity var(--transition-base), padding var(--transition-base);
}
.collapse-card.open .collapse-card-content {
  padding: var(--space-lg);
  opacity: 1;
}

/* ========== Accordion 手风琴折叠组 ========== */
.accordion {
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-xl);
  overflow: hidden;
  margin: var(--space-lg) 0;
}

.accordion-item {
  border-bottom: 1px solid var(--color-border-light);
}

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

.accordion-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) var(--space-lg);
  cursor: pointer;
  user-select: none;
  background: var(--color-surface);
  transition: background var(--transition-fast);
}

.accordion-header:hover {
  background: var(--color-bg-alt);
}

.accordion-title {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-text);
  flex: 1;
}

.accordion-toggle {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: none;
  background: var(--color-bg-alt);
  color: var(--color-text-muted);
  cursor: pointer;
  font-size: var(--text-xs);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-base);
  flex-shrink: 0;
}

.accordion-item.open .accordion-toggle {
  transform: rotate(180deg);
  background: var(--color-primary-light);
  color: var(--color-primary);
}

.accordion-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-base);
}

.accordion-item.open .accordion-body {
  max-height: 2000px;
}

.accordion-content {
  padding: 0 var(--space-lg);
  opacity: 0;
  color: var(--color-text-secondary);
  line-height: 1.7;
  transition: opacity var(--transition-base), padding var(--transition-base);
}

.accordion-item.open .accordion-content {
  padding: var(--space-lg);
  opacity: 1;
}

/* ========== 10. 提示框 Alerts / Callouts ========== */
.alert {
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius-lg);
  margin: var(--space-lg) 0;
  border-left: 5px solid;
  font-size: var(--text-sm);
  line-height: 1.7;
}
.alert-title {
  font-weight: 700;
  margin-bottom: var(--space-xs);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}
.alert p { margin-bottom: 0; }
.alert p + p { margin-top: var(--space-sm); }

.alert-info {
  background: var(--color-info-light);
  border-left-color: var(--color-info);
  color: #1e40af;
}
.alert-success {
  background: var(--color-success-light);
  border-left-color: var(--color-success);
  color: #166534;
}
.alert-warning {
  background: var(--color-warning-light);
  border-left-color: var(--color-warning);
  color: #92400e;
}
.alert-error {
  background: var(--color-error-light);
  border-left-color: var(--color-error);
  color: #991b1b;
}
.alert-tip {
  background: var(--color-tip-light);
  border-left-color: var(--color-tip);
  color: #5b21b6;
}

/* ========== 11. 引用块 Blockquote ========== */
.blockquote {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border-light);
  padding: var(--space-lg) var(--space-xl);
  margin: var(--space-xl) 0;
  position: relative;
}
.blockquote::before {
  content: '\201C';
  position: absolute;
  top: -8px;
  left: var(--space-lg);
  font-size: 4rem;
  color: var(--color-primary);
  opacity: 0.15;
  font-family: Georgia, serif;
  line-height: 1;
}
/* 移除引用块内所有段落的底部间距 */
.blockquote > p,
.blockquote-content p {
  margin-bottom: 0;
}
/* 如果有多个段落，保持段落之间的间距 */
.blockquote > p + p,
.blockquote-content p + p {
  margin-top: var(--space-sm);
}
.blockquote-author {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  font-style: normal;
  font-weight: 500;
  margin-top: var(--space-sm);
  margin-bottom: 0;
}
.blockquote-author::before {
  content: '— ';
}

/* ========== 12. 代码块 Code Block ========== */
.code-block {
  background: #1e293b;
  border-radius: var(--radius-lg);
  margin: var(--space-lg) 0;
  overflow: hidden;
}
.code-block-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-sm) var(--space-md);
  background: #26375b;
  font-size: var(--text-xs);
  color: #94a3b8;
}
.code-block-lang {
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.code-block-copy {
  background: rgba(255, 255, 255, 0.1);
  border: none;
  color: #94a3b8;
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: var(--text-xs);
  font-family: var(--font-sans);
  transition: all var(--transition-fast);
}
.code-block-copy:hover {
  background: rgba(255, 255, 255, 0.2);
  color: #e2e8f0;
}
.code-block-copy.copied {
  background: var(--color-success);
  color: var(--color-text-inverse);
}
.code-block pre {
  padding: 12px 16px;
  margin: 0;
  overflow-x: auto;
}
.code-block code {
  background: transparent !important;
  color: #e2e8f0 !important;
  font-size: var(--text-sm);
  line-height: 1.6;
  padding: 0 !important;
  margin: 0 !important;
}

/* 带行号的代码块 - 配合JS动态添加的行号结构 */
.code-with-line-numbers .code-line {
  display: block;
  line-height: 1.6;
  margin: 0;
  padding: 2px 0; /* 添加上下间距，匹配普通代码块的行间距 */
}

.code-with-line-numbers .line-number {
  display: inline-block;
  width: 2em;
  text-align: right;
  padding-right: 0.5em;
  color: #64748b;
  user-select: none;
  border-right: 1px solid #334155;
  margin-right: 0.5em;
  font-size: 0.9em;
}

.code-with-line-numbers .line-content {
  white-space: pre;
}

/* ========== 13. 表格 Table ========== */
.table-wrapper {
  overflow: hidden;
  overflow-x: auto;
  margin: var(--space-lg) 0;
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
}
.table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
}
.table thead {
  background: var(--color-bg);
}
.table th {
  padding: var(--space-md);
  text-align: left;
  font-weight: 600;
  color: var(--color-text);
  border-bottom: 2px solid var(--color-border);
  white-space: nowrap;
}
.table td {
  padding: var(--space-md);
  border-bottom: 1px solid var(--color-border-light);
  color: var(--color-text-secondary);
}
.table tbody tr:hover {
  background: var(--color-bg);
}
.table-striped tbody tr:nth-child(even) {
  background: var(--color-bg);
}

/* ========== 14. 徽章 Badge / Tag ========== */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 12px;
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
  line-height: 1.5;
}
.badge-primary { background: var(--color-primary-light); color: var(--color-primary-hover); }
.badge-success { background: var(--color-success-light); color: var(--color-success); }
.badge-warning { background: var(--color-warning-light); color: var(--color-warning); }
.badge-error { background: var(--color-error-light); color: var(--color-error); }
.badge-info { background: var(--color-info-light); color: var(--color-info); }
.badge-neutral { background: var(--color-bg-alt); color: var(--color-text-tertiary); }

/* ========== 15. 按钮 Buttons ========== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 10px 24px;
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  border: 2px solid transparent;
  transition: all var(--transition-base);
  font-family: var(--font-sans);
  line-height: 1.5;
}
.btn:active { transform: scale(0.97); }

.btn-primary {
  background: var(--color-primary);
  color: var(--color-text-inverse);
}
.btn-primary:hover {
  background: var(--color-primary-hover);
  transform: translateY(-1px);
  color: var(--color-text-inverse);
}

.btn-secondary {
  background: var(--color-bg-alt);
  color: var(--color-text);
}
.btn-secondary:hover {
  background: var(--color-border);
  color: var(--color-text);
}

.btn-outline {
  background: var(--color-surface);
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.btn-outline:hover {
  background: var(--color-primary);
  color: var(--color-text-inverse);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text-secondary);
}
.btn-ghost:hover {
  background: var(--color-bg-alt);
  color: var(--color-text);
}

.btn-success {
  background: var(--color-success);
  color: var(--color-text-inverse);
}
.btn-success:hover {
  opacity: 0.9;
  color: var(--color-text-inverse);
}

.btn-warning {
  background: var(--color-warning);
  color: var(--color-text-inverse);
}
.btn-warning:hover {
  opacity: 0.9;
  color: var(--color-text-inverse);
}

.btn-error {
  background: var(--color-error);
  color: var(--color-text-inverse);
}
.btn-error:hover {
  opacity: 0.9;
  color: var(--color-text-inverse);
}

.btn-lg { padding: 14px 32px; font-size: var(--text-base); }
.btn-sm { padding: 6px 16px; font-size: var(--text-xs); }

/* ========== 16. 步骤条 / 时间线 Timeline ========== */
.timeline {
  position: relative;
  padding-left: var(--space-xl);
  margin: var(--space-xl) 0;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 8px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--color-border);
}
.timeline-item {
  position: relative;
  margin-bottom: var(--space-xl);
}
.timeline-item:last-child { margin-bottom: 0; }
.timeline-dot {
  position: absolute;
  left: calc(-1 * var(--space-xl) + 2px);
  top: 4px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-primary);
  border: 3px solid var(--color-primary-light);
  z-index: 1;
}
.timeline-dot.completed { background: var(--color-success); border-color: var(--color-success-light); }
.timeline-dot.current { background: var(--color-primary); box-shadow: 0 0 0 4px rgba(249, 115, 22, 0.2); }
.timeline-title {
  font-weight: 700;
  font-size: var(--text-base);
  margin-bottom: var(--space-xs);
  color: var(--color-text);
}
.timeline-text {
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
}

/* 水平步骤条 */
.steps-horizontal {
  display: flex;
  gap: 0;
  margin: var(--space-xl) 0;
  counter-reset: step;
}
.step-item {
  flex: 1;
  text-align: center;
  position: relative;
  padding-top: var(--space-xl);
}
.step-item::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--color-border);
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: var(--text-sm);
  z-index: 1;
}
.step-item::after {
  content: '';
  position: absolute;
  top: 17px;
  left: calc(50% + 18px);
  width: calc(100% - 36px);
  height: 2px;
  background: var(--color-border);
}
.step-item:last-child::after { display: none; }
.step-item.completed::before {
  background: var(--color-success);
  color: var(--color-text-inverse);
  content: '\2713';
}
.step-item.completed::after { background: var(--color-success); }
.step-item.active::before {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  box-shadow: 0 0 0 4px rgba(249, 115, 22, 0.2);
}
.step-label {
  font-weight: 600;
  font-size: var(--text-sm);
  color: var(--color-text);
  margin-top: var(--space-md);  /* 与图标保持间距 */
  margin-bottom: var(--space-xs);
}
.step-desc {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.6;  /* 提高行高，增强可读性 */
  /* 移动端不限制宽度，充分利用屏幕 */
}

/* 桌面端水平布局时的样式 */
@media (min-width: 768px) {
  .step-item .step-desc {
    max-width: 280px;  /* 限制最大宽度，避免过长 */
    margin: 0 auto;    /* 居中显示 */
  }
}

@media (max-width: 640px) {
  .steps-horizontal { flex-direction: column; gap: var(--space-lg); }
  .step-item { text-align: left; padding-top: 0; padding-left: var(--space-2xl); }
  .step-item::before { left: 0; transform: none; }
  .step-item::after { left: 17px; top: 36px; width: 2px; height: calc(100% - 36px); }
}

/* ========== 17. 统计数据 Stats ========== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--space-lg);
  margin: var(--space-xl) 0;
}
.stat-item {
  text-align: center;
  padding: var(--space-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
}
.stat-value {
  font-size: var(--text-4xl);
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1.2;
}
.stat-label {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-xs);
}

/* ========== 18. 图片与标题 Image with Caption ========== */
.figure {
  margin: var(--space-xl) 0;
  text-align: center;
}
.figure img {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  max-width: 100%;
}
.figure-caption {
  margin-top: var(--space-sm);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  font-style: italic;
}

/* ========== 19. 列表样式 Lists ========== */
.list-check {
  list-style: none;
  padding-left: 0;
}
.list-check li {
  padding-left: var(--space-xl);
  position: relative;
  margin-bottom: var(--space-sm);
}
.list-check li::before {
  content: '\2713';
  position: absolute;
  left: 0;
  color: var(--color-success);
  font-weight: 700;
}

.list-arrow {
  list-style: none;
  padding-left: 0;
}
.list-arrow li {
  padding-left: var(--space-lg);
  position: relative;
  margin-bottom: var(--space-sm);
}
.list-arrow li::before {
  content: '\2192';
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-weight: 700;
}

.list-star {
  list-style: none;
  padding-left: 0;
}
.list-star li {
  padding-left: var(--space-lg);
  position: relative;
  margin-bottom: var(--space-sm);
}
.list-star li::before {
  content: '\2605';
  position: absolute;
  left: 0;
  color: var(--color-warning);
}

.list-numbered {
  counter-reset: list-counter;
  list-style: none;
  padding-left: 0;
}
.list-numbered li {
  counter-increment: list-counter;
  padding-left: var(--space-xl);
  position: relative;
  margin-bottom: var(--space-md);
}
.list-numbered li::before {
  content: counter(list-counter);
  position: absolute;
  left: 0;
  top: 0;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--color-primary);
  color: var(--color-text-inverse);
  font-size: var(--text-xs);
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* 字母编号列表 */
.list-alpha {
  list-style-type: lower-alpha;
  padding-left: var(--space-lg);
}
.list-alpha li {
  margin-bottom: var(--space-md);
}

/* ========== 20. 进度条 Progress Bar ========== */
.progress {
  margin: var(--space-md) 0;
}
.progress-label {
  display: flex;
  justify-content: space-between;
  font-size: var(--text-sm);
  font-weight: 600;
  margin-bottom: var(--space-xs);
  color: var(--color-text);
}
.progress-bar {
  height: 8px;
  background: var(--color-bg-alt);
  border-radius: var(--radius-full);
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  border-radius: var(--radius-full);
  background: var(--gradient-accent);
  transition: width 1s ease;
}
.progress-fill.success { background: var(--color-success); }
.progress-fill.warning { background: var(--color-warning); }
.progress-fill.error { background: var(--color-error); }
.progress-fill.info { background: var(--color-info); }

/* ========== 21. 对比表格 Comparison Table ========== */
.comparison-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-size: var(--text-sm);
}
.comparison-table th,
.comparison-table td {
  padding: var(--space-md);
  text-align: center;
  border-bottom: 1px solid var(--color-border-light);
}
.comparison-table th {
  background: var(--color-bg);
  font-weight: 700;
  color: var(--color-text);
}
.comparison-table th:first-child {
  text-align: left;
}
.comparison-table td:first-child {
  text-align: left;
  font-weight: 500;
  color: var(--color-text);
}
.comparison-table .col-highlight {
  background: var(--color-primary-light);
}
.comparison-table .check { color: var(--color-success); }
.comparison-table .cross { color: var(--color-text-muted); }

/* ========== 22. 返回顶部 Back to Top ========== */
.back-to-top {
  position: fixed;
  bottom: var(--space-xl);
  right: var(--space-xl);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--color-primary);
  color: var(--color-text-inverse);
  border: none;
  cursor: pointer;
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--transition-base);
  z-index: 50;
}
.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.back-to-top:hover {
  background: var(--color-primary-hover);
  transform: translateY(-2px);
}

/* ========== 23. 页脚 Footer ========== */
.footer {
  width: 100%;
  background: var(--color-bg);
  border-top: 1px solid var(--color-border-light);
  padding: var(--space-2xl) var(--space-xl) var(--space-xl);
  margin-top: var(--space-3xl);
}
.footer-grid {
  max-width: var(--max-width-wide);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: var(--space-xl);
}
.footer-col-title {
  font-size: var(--text-sm);
  font-weight: 700;
  margin-bottom: var(--space-md);
  color: var(--color-text);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.footer-col a {
  display: block;
  color: var(--color-text-tertiary);
  text-decoration: none;
  margin-bottom: var(--space-sm);
  font-size: var(--text-sm);
  transition: color var(--transition-fast);
}
.footer-col a:hover {
  color: var(--color-primary);
}
.footer-bottom {
  max-width: var(--max-width-wide);
  margin: 0 auto;
  text-align: center;
  padding-top: var(--space-xl);
  margin-top: var(--space-xl);
  border-top: 1px solid var(--color-border);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

/* ========== 24. 分页 Pagination ========== */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-xs);
  margin: var(--space-2xl) 0;
}
.pagination-btn {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-weight: 500;
  font-size: var(--text-sm);
  transition: all var(--transition-fast);
  font-family: var(--font-sans);
}
.pagination-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}
.pagination-btn.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-text-inverse);
}
.pagination-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* ========== 25. 特性网格 Feature Grid ========== */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-xl);
  margin: var(--space-xl) 0;
}
.feature-item {
  display: flex;
  gap: var(--space-md);
  align-items: flex-start;
}
.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: var(--color-primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  color: var(--color-primary);
  flex-shrink: 0;
}
.feature-content h4 {
  font-size: var(--text-base);
  font-weight: 600;
  margin-bottom: var(--space-xs);
}
.feature-content p {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-bottom: 0;
}

/* ========== 26. CTA 横幅 Call to Action ========== */
.cta-banner {
  background: var(--gradient-hero);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  text-align: center;
  margin: var(--space-3xl) 0;
  color: var(--color-text-inverse);
}
.cta-banner h2 {
  color: var(--color-text-inverse);
  font-size: var(--text-3xl);
  margin-bottom: var(--space-md);
}
.cta-banner p {
  color: rgba(255, 255, 255, 0.9);
  font-size: var(--text-lg);
  margin-bottom: var(--space-lg);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}
/* CTA 组件内列表样式：去掉小圆点和缩进 */
.cta-banner ul,
.cta-banner ol {
  list-style: none;
  padding: 0;
  margin: 0 0 var(--space-lg) 0;
}
.cta-banner li {
  margin-bottom: var(--space-sm);
  color: rgba(255, 255, 255, 0.9);
}
.cta-banner li:last-child {
  margin-bottom: 0;
}
/* CTA 按钮组样式 */
.cta-banner p:has(.btn) {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 0;
}
.cta-banner .btn-outline {
  background: transparent;
  color: var(--color-text-inverse);
  border-color: rgba(255, 255, 255, 0.4);
}
.cta-banner .btn-outline:hover {
  background: var(--color-text-inverse);
  color: var(--color-text);
}

/* ========== 27. 响应式视频容器 ========== */
.video-wrapper {
  position: relative;
  padding-bottom: 56.25%;
  height: 0;
  overflow: hidden;
  border-radius: var(--radius-lg);
  margin: var(--space-xl) 0;
}
.video-wrapper iframe,
.video-wrapper video {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: none;
}

/* ========== 28. 键盘快捷键 KBD ========== */
kbd {
  display: inline-block;
  padding: 2px 8px;
  font-size: var(--text-xs);
  font-family: var(--font-mono);
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  box-shadow: 0 1px 0 var(--color-border);
  color: var(--color-text);
}

/* ========== 29. 分隔线增强 ========== */
.divider-dot {
  border: none;
  border-top: 2px dotted var(--color-border);
  margin: var(--space-2xl) 0;
}
.divider-text {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin: var(--space-2xl) 0;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}
.divider-text::before,
.divider-text::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--color-border);
}

/* ========== 30. 色系切换面板 Theme Panel ========== */
.theme-panel {
  position: fixed;
  bottom: var(--space-xl);
  right: 80px;
  z-index: 99;
}
.theme-toggle-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--color-surface);
  border: 2px solid var(--color-border);
  color: var(--color-primary);
  cursor: pointer;
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
  transition: all var(--transition-base);
}
.theme-toggle-btn:hover {
  border-color: var(--color-primary);
  transform: scale(1.08);
  box-shadow: var(--shadow-xl);
}
.theme-dropdown {
  position: absolute;
  bottom: 56px;
  right: 0;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  padding: var(--space-md);
  min-width: 200px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: all var(--transition-base);
}
.theme-dropdown.open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.theme-dropdown-title {
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
  padding: 0 var(--space-xs);
}
.theme-options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px;
}
.theme-option {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 8px 12px;
  border: none;
  background: transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
  font-family: var(--font-sans);
}
.theme-option:hover {
  background: var(--color-bg-alt);
  color: var(--color-text);
}
.theme-option.active {
  background: var(--color-primary-light);
  color: var(--color-primary);
  font-weight: 600;
}
.theme-dot {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  flex-shrink: 0;
  box-shadow: inset 0 1px 2px rgba(0,0,0,0.15);
}

@media (max-width: 768px) {
  .theme-panel {
    right: var(--space-md);
    bottom: var(--space-md);
  }
}

/* ========== 31. 模态框 Modal ========== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
  backdrop-filter: blur(2px);
}
.modal-overlay.open {
  opacity: 1;
  visibility: visible;
}
.modal {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  width: 90%;
  max-width: 520px;
  max-height: 85vh;
  overflow-y: auto;
  transform: translateY(20px) scale(0.97);
  transition: all var(--transition-base);
}
.modal-overlay.open .modal {
  transform: translateY(0) scale(1);
}
.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-lg) var(--space-lg) 0;
}
.modal-title {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text);
}
.modal-header .modal-close {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: none;
  background: var(--color-bg-alt);
  color: var(--color-text-muted);
  cursor: pointer;
  font-size: var(--text-base);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  font-family: var(--font-sans);
}
.modal-header .modal-close:hover {
  background: var(--color-error-light);
  color: var(--color-error);
}
.modal-body {
  padding: var(--space-lg);
  color: var(--color-text-secondary);
  line-height: 1.7;
}
.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: var(--space-sm);
  padding: 0 var(--space-lg) var(--space-lg);
}
.modal-footer .btn {
  white-space: nowrap;
  min-width: 90px;
  justify-content: center;
}

.modal-sm { max-width: 360px; }
.modal-lg { max-width: 720px; }
.modal-xl { max-width: 960px; }

.modal-icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  margin: 0 auto var(--space-md);
}
.modal-icon-success { background: var(--color-success-light); color: var(--color-success); }
.modal-icon-warning { background: var(--color-warning-light); color: var(--color-warning); }
.modal-icon-error { background: var(--color-error-light); color: var(--color-error); }
.modal-icon-info { background: var(--color-info-light); color: var(--color-info); }

.modal-centered .modal-body {
  text-align: center;
}

/* ========== 32. 评分组件 Rating ========== */
.rating {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  margin: var(--space-md) 0;
}
.rating-star {
  font-size: 1.5rem;
  color: var(--color-border);
  cursor: pointer;
  transition: all var(--transition-fast);
  user-select: none;
}
.rating-star.filled {
  color: #f59e0b;
}
.rating-star.half {
  position: relative;
  color: var(--color-border);
}
.rating-star.half::before {
  content: '\2605';
  position: absolute;
  left: 0;
  width: 50%;
  overflow: hidden;
  color: #f59e0b;
}
.rating-star:hover,
.rating-star:hover ~ .rating-star {
  color: #fbbf24;
}
.rating.interactive .rating-star:hover {
  transform: scale(1.2);
}
.rating-score {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text);
  margin-left: var(--space-sm);
}
.rating-count {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-left: var(--space-xs);
}
.rating-sm .rating-star { font-size: 1rem; }
.rating-lg .rating-star { font-size: 2rem; }

/* ========== 33. 用户评价 Testimonials ========== */
.testimonial-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--space-lg);
  margin: var(--space-xl) 0;
}
.testimonial-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-xl);
  padding: var(--space-lg);
  position: relative;
}
.testimonial-card::before {
  content: '\201C';
  position: absolute;
  top: 8px;
  left: var(--space-md);
  font-size: 3rem;
  color: var(--color-primary);
  opacity: 0.15;
  font-family: Georgia, serif;
  line-height: 1;
}
.testimonial-text {
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  line-height: 1.7;
  margin-bottom: var(--space-md);
  position: relative;
  z-index: 1;
}
.testimonial-author {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-border-light);
}
.testimonial-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--gradient-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-inverse);
  font-weight: 700;
  font-size: var(--text-sm);
  flex-shrink: 0;
}
.testimonial-name {
  font-weight: 600;
  font-size: var(--text-sm);
  color: var(--color-text);
}
.testimonial-role {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}
.testimonial-rating {
  margin-bottom: var(--space-sm);
  color: #f59e0b;
  font-size: var(--text-sm);
}

/* ========== 34. 滚动评价 Marquee Testimonials ========== */
.testimonial-marquee {
  overflow: hidden;
  margin: var(--space-xl) 0;
  position: relative;
}
.testimonial-marquee::before,
.testimonial-marquee::after {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  width: 60px;
  z-index: 2;
  pointer-events: none;
}
.testimonial-marquee::before {
  left: 0;
  background: linear-gradient(to right, var(--color-white), transparent);
}
.testimonial-marquee::after {
  right: 0;
  background: linear-gradient(to left, var(--color-white), transparent);
}
.testimonial-track {
  display: flex;
  gap: var(--space-lg);
  animation: marquee-scroll 30s linear infinite;
  width: max-content;
}
.testimonial-track:hover {
  animation-play-state: paused;
}
@keyframes marquee-scroll {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}
.testimonial-marquee .testimonial-card {
  min-width: 340px;
  max-width: 340px;
  flex-shrink: 0;
}

@media (max-width: 768px) {
  .testimonial-marquee .testimonial-card {
    min-width: 280px;
    max-width: 280px;
  }
}

/* ========== 35. Hero 变体 ========== */
.hero-centered {
  text-align: center;
}
.hero-centered .hero-subtitle {
  margin-left: auto;
  margin-right: auto;
}
.hero-centered .hero-actions {
  justify-content: center;
}
.hero-centered .hero-stats {
  justify-content: center;
}

.hero-split {
  display: flex;
  align-items: center;
  gap: var(--space-3xl);
}
.hero-split .hero-text {
  flex: 1;
}
.hero-split .hero-image {
  flex: 1;
  display: flex;
  justify-content: center;
}
.hero-split .hero-image img {
  max-width: 100%;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
}
@media (max-width: 768px) {
  .hero-split {
    flex-direction: column;
    text-align: center;
  }
  .hero-split .hero-actions {
    justify-content: center;
  }
}

.hero-minimal {
  background: var(--color-surface);
  color: var(--color-text);
  border-bottom: 1px solid var(--color-border-light);
}
.hero-minimal::before {
  display: none;
}
.hero-minimal .hero-title {
  color: var(--color-text);
}
.hero-minimal .hero-subtitle {
  color: var(--color-text-secondary);
}
.hero-minimal .hero-stats {
  border-top-color: var(--color-border-light);
}
.hero-minimal .hero-stat-label {
  color: var(--color-text-muted);
}

.hero-gradient {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-hover) 100%);
}
.hero-gradient::before {
  background: radial-gradient(circle, rgba(255,255,255,0.15) 0%, transparent 70%);
  opacity: 1;
}
.hero-gradient .hero-badge {
  background: rgba(255,255,255,0.2);
  border-color: rgba(255,255,255,0.3);
  color: var(--color-text-inverse);
}

/* ========== 36. 思维导图 MindMap ========== */
.mindmap {
  margin: var(--space-xl) 0;
  padding: var(--space-lg);
  background: var(--color-bg-alt);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-light);
}

.mindmap-vertical {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.mindmap-horizontal {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.mindmap-node {
  background: white;
  border-radius: var(--radius-md);
  border: 2px solid var(--color-border);
  padding: var(--space-md);
  transition: all var(--transition-base);
  position: relative;
}

.mindmap-node:hover {
  border-color: var(--color-primary);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.mindmap-node-header {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-sm);
}

.mindmap-icon {
  font-size: 1.2em;
  color: var(--color-primary);
}

.mindmap-node-title {
  font-weight: 600;
  font-size: var(--text-base);
  color: var(--color-text);
}

.mindmap-node-content {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.mindmap-node-content p {
  margin: 0;
}

.mindmap-node-content ul,
.mindmap-node-content ol {
  margin: var(--space-sm) 0;
  padding-left: var(--space-lg);
}

/* 颜色变体 */
.mindmap-color-primary {
  border-color: var(--color-primary);
}
.mindmap-color-primary .mindmap-icon {
  color: var(--color-primary);
}

.mindmap-color-success {
  border-color: var(--color-success);
}
.mindmap-color-success .mindmap-icon {
  color: var(--color-success);
}

.mindmap-color-warning {
  border-color: var(--color-warning);
}
.mindmap-color-warning .mindmap-icon {
  color: var(--color-warning);
}

.mindmap-color-error {
  border-color: var(--color-error);
}
.mindmap-color-error .mindmap-icon {
  color: var(--color-error);
}

.mindmap-color-info {
  border-color: var(--color-info);
}
.mindmap-color-info .mindmap-icon {
  color: var(--color-info);
}

/* 层级样式 */
.mindmap-level-0 {
  border-width: 3px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  color: white;
}
.mindmap-level-0 .mindmap-node-title {
  color: white;
  font-size: var(--text-lg);
}
.mindmap-level-0 .mindmap-icon {
  color: white;
}
.mindmap-level-0 .mindmap-node-content {
  color: rgba(255, 255, 255, 0.9);
}

.mindmap-level-1 {
  margin-left: var(--space-xl);
  border-width: 2px;
}

.mindmap-level-2 {
  margin-left: calc(var(--space-xl) * 2);
  border-width: 1px;
  opacity: 0.9;
}

.mindmap-level-3 {
  margin-left: calc(var(--space-xl) * 3);
  border-width: 1px;
  opacity: 0.8;
}

/* Compact 样式 */
.mindmap-compact .mindmap-node {
  padding: var(--space-sm);
}
.mindmap-compact .mindmap-node-title {
  font-size: var(--text-sm);
}
.mindmap-compact .mindmap-node-content {
  font-size: var(--text-xs);
}

/* Colorful 样式 */
.mindmap-colorful .mindmap-node:nth-child(1) { border-color: #f97316; }
.mindmap-colorful .mindmap-node:nth-child(2) { border-color: #2563eb; }
.mindmap-colorful .mindmap-node:nth-child(3) { border-color: #16a34a; }
.mindmap-colorful .mindmap-node:nth-child(4) { border-color: #7c3aed; }
.mindmap-colorful .mindmap-node:nth-child(5) { border-color: #dc2626; }
.mindmap-colorful .mindmap-node:nth-child(6) { border-color: #0d9488; }

/* 响应式 */
@media (max-width: 768px) {
  .mindmap-horizontal {
    flex-direction: column;
  }
  
  .mindmap-level-1,
  .mindmap-level-2,
  .mindmap-level-3 {
    margin-left: var(--space-md);
  }
}

/* ========== 36.5. 思维导图 MindMap (Markmap) ========== */
.mindmap-wrapper {
  margin: var(--space-lg) 0;
  padding: var(--space-md);
  background: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-light);
  overflow: hidden;
  position: relative;
}

.mindmap-container {
  width: 100%;
  height: 500px;
  min-height: 400px;
  display: block;
  overflow: visible;
  cursor: grab;
  position: relative;
}

.mindmap-container:active {
  cursor: grabbing;
}

.mindmap-container svg {
  width: 100%;
  height: 100%;
  display: block;
  /* 优化触摸和点击体验 */
  touch-action: pan-x pan-y; /* 允许平移，禁用默认触摸行为 */
  -webkit-tap-highlight-color: transparent; /* 移除点击高亮 */
}

/* Markmap 节点样式优化 */
.mindmap-container .markmap-node {
  cursor: pointer;
}

.mindmap-container .markmap-node circle {
  /* 增大点击区域 */
  stroke-width: 2;
}

.mindmap-container .markmap-node text {
  /* 确保文字可选择 */
  user-select: none;
  pointer-events: none;
}

.mindmap-controls {
  position: absolute;
  top: 10px;
  right: 10px;
  z-index: 10;
  opacity: 0.7;
  transition: opacity 0.3s ease;
}

.mindmap-controls:hover {
  opacity: 1;
}

.mindmap-control-btn {
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid var(--color-border-light);
  border-radius: 4px;
  margin-bottom: 4px;
  padding: 6px;
  cursor: pointer;
  font-size: 16px;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  transition: all 0.2s ease;
  color: var(--color-text-primary);
  line-height: 1;
}

.mindmap-control-btn:hover {
  background: rgba(255, 255, 255, 1);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
  transform: scale(1.05);
}

.mindmap-control-reset {
  font-size: 14px;
}

/* ========== 37. 打印样式 ========== */
@media print {
  .navbar,
  .footer,
  .back-to-top,
  .theme-panel,
  .toc { display: none; }
  body { font-size: 12pt; }
  .container { max-width: 100%; }
}

/* ========== 38. Mermaid 图表样式 ========== */
.mermaid-wrapper {
  margin: var(--space-lg) 0;
  padding: var(--space-md);
  background: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-light);
  overflow: hidden;
}

.mermaid-container {
  width: 100%;
  min-height: 200px;
  /* 不设置 max-height，让容器高度自适应 SVG 内容 */
  display: block;
  overflow: visible; /* 改为 visible，让 svg-pan-zoom 正常工作 */
  cursor: grab;
  position: relative;
}

.mermaid-container:active {
  cursor: grabbing; /* 拖拽时光标：抓取中 */
}

/* svg-pan-zoom 控制按钮样式 */
.svg-pan-zoom-controls {
  position: absolute !important;
  top: 10px !important;
  right: 10px !important;
  z-index: 10 !important;
  opacity: 0.7;
  transition: opacity 0.3s ease;
}

.svg-pan-zoom-controls:hover {
  opacity: 1;
}

.svg-pan-zoom-control-button {
  background: rgba(255, 255, 255, 0.9) !important;
  border: 1px solid var(--color-border-light) !important;
  border-radius: 4px !important;
  margin-bottom: 4px !important;
  padding: 6px !important;
  cursor: pointer !important;
  font-size: 16px !important;
  width: 32px !important;
  height: 32px !important;
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1) !important;
  transition: all 0.2s ease !important;
}

.svg-pan-zoom-control-button:hover {
  background: rgba(255, 255, 255, 1) !important;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15) !important;
  transform: scale(1.05);
}

/* Mermaid 生成的 SVG 样式 */
.mermaid-container svg {
  max-width: 100%;
  height: auto;
  display: block;
}

/* 加载状态 */
.mermaid-loading {
  text-align: center;
  padding: var(--space-xl);
  color: var(--color-text-tertiary);
  font-size: var(--text-sm);
}

/* 错误状态 */
.mermaid-error {
  text-align: center;
  padding: var(--space-lg);
  color: var(--color-error);
  background: rgba(239, 68, 68, 0.1);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
}

/* 响应式优化 */
@media (max-width: 768px) {
  .mermaid-wrapper {
    padding: var(--space-sm);
  }
  
  .mermaid-container {
    min-height: 150px;
  }
  
  /* 移动端优化：SVG 自适应宽高，避免上下空白区域 */
  .mermaid-container svg {
    width: 100%;
    height: auto;
    max-width: 100%;
    max-height: none; /* 移除高度限制 */
  }
  
  /* Markmap 移动端优化：根据内容自适应高度 */
  .mindmap-wrapper {
    padding: var(--space-sm);
  }
  
  .mindmap-container {
    height: auto !important; /* 强制使用 JS 计算的动态高度 */
    min-height: 300px;
    max-height: 80vh; /* 限制最大高度为视口的 80% */
  }
  
  /* Markmap 控制按钮暗黑模式适配 */
  [data-theme*="-dark"] .mindmap-control-btn {
    background: rgba(30, 41, 59, 0.9); /* 深色背景 */
    border-color: var(--color-border);
    color: #e2e8f0; /* 浅色图标 */
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
  }
  
  [data-theme*="-dark"] .mindmap-control-btn:hover {
    background: rgba(51, 65, 85, 1);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.4);
  }
}

/* ========== Proto 原型图组件 ========== */
.proto-container {
  margin: var(--space-lg) auto;
  display: flex;
  justify-content: center;
  align-items: flex-start;  /* 改为顶部对齐，避免垂直拉伸 */
  overflow: visible;  /* 允许内容溢出，保持原始尺寸 */
}

/* Canvas 样式 */
.proto-container canvas {
  display: block;
  /* 移除 max-width: 100%，让 Canvas 以原始尺寸显示 */
  flex-shrink: 0;  /* 防止 flex 容器压缩 Canvas */
  height: auto;     /* 保持宽高比 */
  border-radius: var(--radius-lg);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  /* 移除 background，让 Canvas 内部绘制决定背景色 */
  transition: transform 0.2s, box-shadow 0.2s;
}

.proto-container canvas:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.12);
}

/* 错误提示 */
.proto-error {
  padding: var(--space-md);
  background: #fee;
  border: 2px solid #fcc;
  border-radius: var(--radius-md);
  color: #c00;
  font-family: monospace;
  font-size: 0.9rem;
  text-align: center;
}

/* ========== Proto 放大查看器样式 ========== */
.proto-viewer-overlay {
  animation: fadeIn 0.2s ease-out;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.proto-viewer-container {
  animation: scaleIn 0.3s ease-out;
}

@keyframes scaleIn {
  from { transform: scale(0.9); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

.proto-viewer-close:hover {
  background: #f5f5f5 !important;
}

/* 移动端优化 */
@media (max-width: 768px) {
  .proto-viewer-close {
    top: -50px;
    right: 10px;
    width: 44px;
    height: 44px;
    font-size: 32px;
    line-height: 44px;
  }
}

.proto-error-title {
  font-weight: bold;
  margin-bottom: var(--space-xs);
}

.proto-error-message {
  font-size: 0.85rem;
  opacity: 0.8;
}

/* 响应式适配 */
@media (max-width: 768px) {
  /* 移动端恢复 Canvas 缩小能力 */
  .proto-container canvas {
    flex-shrink: 1;
    max-width: 100%;
  }
}