/* ===================================
   YongDa.Ai 产品策划网站 - 核心样式
   =================================== */

:root {
  --primary: #1a56db;
  --primary-light: #e8f0fe;
  --primary-dark: #1240a8;
  --accent: #f59e0b;
  --accent-light: #fef3c7;
  --success: #10b981;
  --success-light: #d1fae5;
  --danger: #ef4444;
  --danger-light: #fee2e2;
  --warning: #f59e0b;
  --warning-light: #fef3c7;
  --purple: #8b5cf6;
  --purple-light: #ede9fe;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
  --white: #ffffff;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow: 0 4px 6px rgba(0,0,0,0.07);
  --shadow-md: 0 8px 16px rgba(0,0,0,0.1);
  --shadow-lg: 0 16px 32px rgba(0,0,0,0.12);
  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--gray-50);
  color: var(--gray-800);
  line-height: 1.6;
  font-size: 14px;
}

/* ===================================
   布局
   =================================== */

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.grid-3 {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 20px;
}

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

@media (max-width: 1024px) {
  .grid-3 { grid-template-columns: 1fr 1fr; }
  .grid-4 { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .container { padding: 0 16px; }
}

/* ===================================
   导航栏
   =================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--white);
  border-bottom: 1px solid var(--gray-200);
  box-shadow: var(--shadow-sm);
}

.site-header .inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.site-logo .logo-icon {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--primary), #60a5fa);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 700;
  font-size: 14px;
}

.site-logo .logo-text {
  font-size: 16px;
  font-weight: 700;
  color: var(--gray-900);
}

.site-logo .logo-sub {
  font-size: 11px;
  color: var(--gray-500);
  font-weight: 400;
}

.site-nav {
  display: flex;
  gap: 4px;
  align-items: center;
}

.site-nav a {
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  color: var(--gray-600);
  font-size: 13px;
  font-weight: 500;
  transition: all 0.2s;
  white-space: nowrap;
}

.site-nav a:hover, .site-nav a.active {
  background: var(--primary-light);
  color: var(--primary);
}

.nav-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--danger);
  color: white;
  font-size: 10px;
  font-weight: 700;
  border-radius: 10px;
  padding: 1px 5px;
  margin-left: 4px;
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 6px;
}

.hamburger span {
  width: 22px;
  height: 2px;
  background: var(--gray-600);
  border-radius: 2px;
  transition: 0.3s;
}

@media (max-width: 900px) {
  .hamburger { display: flex; }
  .site-nav {
    display: none;
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    background: var(--white);
    border-bottom: 1px solid var(--gray-200);
    flex-direction: column;
    padding: 12px 24px;
    gap: 4px;
    z-index: 99;
  }
  .site-nav.open { display: flex; }
  .site-nav a { padding: 8px 12px; }
}

/* ===================================
   Hero Banner
   =================================== */

.hero {
  background: linear-gradient(135deg, #1e3a8a 0%, #1a56db 50%, #3b82f6 100%);
  color: white;
  padding: 60px 0 48px;
}

.hero-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.25);
  border-radius: 20px;
  padding: 4px 14px;
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 16px;
}

.hero h1 {
  font-size: 36px;
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 16px;
}

.hero h1 span {
  color: #93c5fd;
}

.hero p {
  font-size: 16px;
  color: rgba(255,255,255,0.85);
  max-width: 640px;
  margin-bottom: 32px;
}

.hero-stats {
  display: flex;
  gap: 32px;
  flex-wrap: wrap;
}

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

.hero-stat .num {
  font-size: 28px;
  font-weight: 800;
  color: #93c5fd;
  display: block;
}

.hero-stat .label {
  font-size: 12px;
  color: rgba(255,255,255,0.7);
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255,255,255,0.15);
  border-radius: 8px;
  padding: 4px 10px;
  font-size: 12px;
  margin: 4px;
}

/* ===================================
   Section
   =================================== */

.section {
  padding: 48px 0;
}

.section-sm {
  padding: 32px 0;
}

.section-header {
  margin-bottom: 28px;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 20px;
  padding: 4px 12px;
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 8px;
}

.section-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 6px;
}

.section-desc {
  color: var(--gray-500);
  font-size: 14px;
  max-width: 640px;
}

/* ===================================
   卡片
   =================================== */

.card {
  background: var(--white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--gray-200);
  padding: 24px;
  transition: all 0.2s;
}

.card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--gray-300);
}

.card-sm {
  padding: 16px;
  border-radius: var(--radius);
}

.card-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 6px;
}

.card-body {
  color: var(--gray-600);
  font-size: 13px;
  line-height: 1.7;
}

/* ===================================
   标签 Badge / Tag
   =================================== */

.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 8px;
  border-radius: 6px;
  font-size: 11px;
  font-weight: 600;
  white-space: nowrap;
}

.badge-blue { background: var(--primary-light); color: var(--primary); }
.badge-green { background: var(--success-light); color: var(--success); }
.badge-red { background: var(--danger-light); color: var(--danger); }
.badge-yellow { background: var(--accent-light); color: #b45309; }
.badge-purple { background: var(--purple-light); color: var(--purple); }
.badge-gray { background: var(--gray-100); color: var(--gray-600); }

/* ===================================
   Tab 切换
   =================================== */

.tab-nav {
  display: flex;
  gap: 4px;
  border-bottom: 1px solid var(--gray-200);
  margin-bottom: 24px;
  overflow-x: auto;
  scrollbar-width: none;
}

.tab-nav::-webkit-scrollbar { display: none; }

.tab-btn {
  flex-shrink: 0;
  padding: 10px 18px;
  border: none;
  background: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  color: var(--gray-500);
  transition: all 0.2s;
  white-space: nowrap;
}

.tab-btn:hover { color: var(--primary); }
.tab-btn.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
  font-weight: 600;
}

.tab-pane { display: none; }
.tab-pane.active { display: block; }

/* ===================================
   手机线框图
   =================================== */

.wireframe-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
  margin-top: 16px;
}

.wireframe {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.wireframe-header {
  background: var(--gray-800);
  color: white;
  padding: 10px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.wireframe-title {
  font-size: 13px;
  font-weight: 600;
}

.wireframe-badge {
  font-size: 10px;
  background: var(--primary);
  padding: 2px 8px;
  border-radius: 10px;
}

.wireframe-body {
  padding: 16px;
}

.wf-block {
  background: var(--gray-100);
  border: 1px dashed var(--gray-300);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  margin-bottom: 8px;
  font-size: 11px;
  color: var(--gray-600);
}

.wf-block.highlight {
  background: var(--primary-light);
  border-color: var(--primary);
  color: var(--primary);
  font-weight: 600;
}

.wf-block.accent {
  background: var(--accent-light);
  border-color: var(--accent);
  color: #92400e;
  font-weight: 600;
}

.wf-block.success {
  background: var(--success-light);
  border-color: var(--success);
  color: #065f46;
}

.wf-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-bottom: 8px;
}

.wf-row.grid3 {
  grid-template-columns: 1fr 1fr 1fr;
}

.wf-row.grid4 {
  grid-template-columns: 1fr 1fr 1fr 1fr;
}

.wf-btn {
  background: var(--primary);
  color: white;
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  text-align: center;
  font-size: 11px;
  font-weight: 600;
  margin-bottom: 8px;
}

.wf-btn.outline {
  background: none;
  border: 1px solid var(--primary);
  color: var(--primary);
}

.wf-tabbar {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  border-top: 1px solid var(--gray-200);
  margin-top: 8px;
  padding-top: 8px;
}

.wf-tabbar-item {
  text-align: center;
  font-size: 9px;
  color: var(--gray-400);
  padding: 4px;
}

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

.wf-divider {
  height: 1px;
  background: var(--gray-200);
  margin: 8px 0;
}

.wf-label {
  font-size: 10px;
  font-weight: 700;
  color: var(--gray-400);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 4px;
  padding: 4px 0;
}

/* ===================================
   页面说明卡片
   =================================== */

.page-spec-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 20px;
}

.page-spec-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  padding: 18px 20px;
  border-bottom: 1px solid var(--gray-100);
  background: var(--gray-50);
  cursor: pointer;
  user-select: none;
}

.page-spec-header:hover {
  background: var(--gray-100);
}

.page-spec-title {
  display: flex;
  align-items: center;
  gap: 10px;
}

.page-spec-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  flex-shrink: 0;
}

.page-spec-name {
  font-size: 15px;
  font-weight: 700;
  color: var(--gray-900);
}

.page-spec-id {
  font-size: 11px;
  color: var(--gray-400);
}

.page-spec-expand {
  color: var(--gray-400);
  font-size: 18px;
  transition: transform 0.25s;
  padding: 4px;
}

.page-spec-header.expanded .page-spec-expand {
  transform: rotate(90deg);
}

.page-spec-body {
  display: none;
  padding: 20px;
}

.page-spec-body.show {
  display: block;
}

.spec-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

@media (max-width: 768px) {
  .spec-grid { grid-template-columns: 1fr; }
}

.spec-section {
  margin-bottom: 16px;
}

.spec-section-title {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--gray-400);
  letter-spacing: 0.08em;
  margin-bottom: 8px;
  padding-bottom: 4px;
  border-bottom: 1px solid var(--gray-100);
}

.spec-item {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: 6px 0;
  border-bottom: 1px dashed var(--gray-100);
  font-size: 13px;
}

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

.spec-item-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--primary);
  margin-top: 6px;
  flex-shrink: 0;
}

.spec-item-dot.warn { background: var(--warning); }
.spec-item-dot.success { background: var(--success); }
.spec-item-dot.danger { background: var(--danger); }

.spec-flow {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.spec-flow-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
}

.spec-flow-arrow {
  color: var(--gray-300);
  font-size: 10px;
  margin-left: 8px;
}

.spec-state-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.spec-api-item {
  background: var(--gray-100);
  border-radius: var(--radius-sm);
  padding: 6px 10px;
  font-size: 11px;
  font-family: 'Courier New', monospace;
  color: var(--gray-700);
  margin-bottom: 4px;
}

/* ===================================
   流程图
   =================================== */

.flow-diagram {
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 20px;
  margin: 16px 0;
}

.flow-steps {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0;
}

.flow-step {
  display: flex;
  align-items: center;
  gap: 0;
}

.flow-box {
  background: var(--white);
  border: 1.5px solid var(--primary);
  border-radius: var(--radius-sm);
  padding: 8px 14px;
  font-size: 12px;
  font-weight: 600;
  color: var(--primary);
  white-space: nowrap;
}

.flow-box.highlight {
  background: var(--primary);
  color: white;
}

.flow-box.success-box {
  border-color: var(--success);
  color: var(--success);
}

.flow-box.warn-box {
  border-color: var(--accent);
  color: #92400e;
}

.flow-arrow {
  padding: 0 6px;
  color: var(--gray-400);
  font-size: 14px;
}

.flow-line {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

/* ===================================
   表格
   =================================== */

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.data-table th {
  background: var(--gray-50);
  padding: 10px 14px;
  text-align: left;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--gray-500);
  letter-spacing: 0.05em;
  border-bottom: 2px solid var(--gray-200);
}

.data-table td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--gray-100);
  vertical-align: top;
}

.data-table tr:hover td {
  background: var(--gray-50);
}

.data-table tr:last-child td {
  border-bottom: none;
}

/* ===================================
   对标卡片
   =================================== */

.brand-card {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--gray-200);
}

.brand-card-header {
  padding: 16px 20px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 14px;
  color: white;
  flex-shrink: 0;
}

.brand-info .name {
  font-size: 15px;
  font-weight: 700;
  color: var(--gray-900);
}

.brand-info .type {
  font-size: 11px;
  color: var(--gray-500);
}

.brand-card-body {
  padding: 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.brand-metric {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.brand-metric .label {
  font-size: 12px;
  color: var(--gray-500);
}

.brand-metric .value {
  font-size: 12px;
  font-weight: 600;
  color: var(--gray-800);
}

.star-rating {
  display: flex;
  gap: 1px;
  font-size: 12px;
}

.star-fill { color: var(--accent); }
.star-empty { color: var(--gray-300); }

.pros-cons {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 12px;
}

.pros, .cons {
  font-size: 12px;
  line-height: 1.8;
  color: var(--gray-600);
}

.pros-title {
  font-weight: 700;
  color: var(--success);
  margin-bottom: 4px;
  font-size: 11px;
}

.cons-title {
  font-weight: 700;
  color: var(--danger);
  margin-bottom: 4px;
  font-size: 11px;
}

/* ===================================
   里程碑时间线
   =================================== */

.timeline {
  position: relative;
  padding-left: 28px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 10px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: var(--gray-200);
}

.timeline-item {
  position: relative;
  margin-bottom: 24px;
}

.timeline-item:last-child { margin-bottom: 0; }

.timeline-dot {
  position: absolute;
  left: -24px;
  top: 6px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 2px solid var(--white);
  box-shadow: 0 0 0 2px var(--gray-300);
}

.timeline-dot.active {
  background: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
}

.timeline-dot.done {
  background: var(--success);
  box-shadow: 0 0 0 3px var(--success-light);
}

.timeline-dot.future {
  background: var(--gray-300);
}

.timeline-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
}

.timeline-version {
  font-size: 13px;
  font-weight: 700;
  color: var(--gray-800);
}

.timeline-period {
  font-size: 11px;
  color: var(--gray-400);
}

.timeline-features {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

/* ===================================
   链路流程卡
   =================================== */

.loop-card {
  border-radius: var(--radius-lg);
  border: 1px solid var(--gray-200);
  overflow: hidden;
  transition: all 0.2s;
}

.loop-card:hover {
  box-shadow: var(--shadow-md);
}

.loop-card-header {
  padding: 14px 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.loop-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  flex-shrink: 0;
}

.loop-card-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--gray-900);
}

.loop-card-sub {
  font-size: 11px;
  color: var(--gray-500);
}

.loop-card-body {
  padding: 0 16px 16px;
  font-size: 12px;
  color: var(--gray-600);
  line-height: 1.8;
}

.loop-steps {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.loop-step {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
}

.loop-step-num {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 10px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

/* ===================================
   KPI 指标卡
   =================================== */

.kpi-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 20px;
}

.kpi-num {
  font-size: 28px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
  margin-bottom: 4px;
}

.kpi-label {
  font-size: 12px;
  color: var(--gray-500);
  margin-bottom: 8px;
}

.kpi-bar {
  height: 4px;
  background: var(--gray-100);
  border-radius: 2px;
  overflow: hidden;
}

.kpi-bar-fill {
  height: 100%;
  background: var(--primary);
  border-radius: 2px;
}

/* ===================================
   页面树
   =================================== */

.page-tree {
  font-size: 13px;
  line-height: 1.6;
}

.tree-root {
  margin-bottom: 16px;
}

.tree-root-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  color: var(--gray-900);
  font-size: 14px;
  padding: 10px 14px;
  background: var(--gray-100);
  border-radius: var(--radius);
  cursor: pointer;
  user-select: none;
}

.tree-root-title:hover {
  background: var(--gray-200);
}

.tree-children {
  padding: 8px 0 0 20px;
  border-left: 2px solid var(--gray-200);
  margin-left: 14px;
}

.tree-child {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background 0.15s;
  position: relative;
}

.tree-child::before {
  content: '';
  position: absolute;
  left: -20px;
  top: 50%;
  width: 14px;
  height: 1px;
  background: var(--gray-200);
}

.tree-child:hover {
  background: var(--primary-light);
}

.tree-child .name {
  flex: 1;
  color: var(--gray-700);
}

.tree-child .id {
  font-size: 11px;
  color: var(--gray-400);
  font-family: 'Courier New', monospace;
}

/* ===================================
   后台能力模块
   =================================== */

.backend-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 20px;
}

.backend-icon {
  font-size: 24px;
  margin-bottom: 12px;
}

.backend-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 10px;
}

.backend-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.backend-list li {
  font-size: 12px;
  color: var(--gray-600);
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 3px 0;
}

.backend-list li::before {
  content: '◦';
  color: var(--primary);
  font-size: 14px;
}

/* ===================================
   固定侧边栏目录
   =================================== */

.toc-sidebar {
  position: sticky;
  top: 72px;
  max-height: calc(100vh - 100px);
  overflow-y: auto;
  scrollbar-width: thin;
}

.layout-with-toc {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 32px;
  align-items: start;
}

@media (max-width: 1024px) {
  .layout-with-toc { grid-template-columns: 1fr; }
  .toc-sidebar { display: none; }
}

.toc-list {
  list-style: none;
}

.toc-item a {
  display: block;
  padding: 5px 12px;
  border-radius: var(--radius-sm);
  font-size: 12px;
  color: var(--gray-500);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: all 0.15s;
}

.toc-item a:hover,
.toc-item a.active {
  color: var(--primary);
  border-left-color: var(--primary);
  background: var(--primary-light);
}

.toc-group-title {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--gray-400);
  letter-spacing: 0.07em;
  padding: 12px 12px 4px;
}

/* ===================================
   通用工具类
   =================================== */

.text-primary { color: var(--primary); }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.text-warning { color: var(--warning); }
.text-gray { color: var(--gray-500); }
.text-bold { font-weight: 700; }
.text-sm { font-size: 12px; }
.text-xs { font-size: 11px; }
.text-lg { font-size: 16px; }
.text-xl { font-size: 20px; }
.text-center { text-align: center; }

.bg-primary { background: var(--primary); }
.bg-primary-light { background: var(--primary-light); }
.bg-success-light { background: var(--success-light); }
.bg-accent-light { background: var(--accent-light); }
.bg-purple-light { background: var(--purple-light); }

.mt-4 { margin-top: 4px; }
.mt-8 { margin-top: 8px; }
.mt-12 { margin-top: 12px; }
.mt-16 { margin-top: 16px; }
.mt-20 { margin-top: 20px; }
.mt-24 { margin-top: 24px; }
.mb-8 { margin-bottom: 8px; }
.mb-12 { margin-bottom: 12px; }
.mb-16 { margin-bottom: 16px; }
.mb-20 { margin-bottom: 20px; }
.mb-24 { margin-bottom: 24px; }

.flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.justify-between { justify-content: space-between; }
.gap-4 { gap: 4px; }
.gap-6 { gap: 6px; }
.gap-8 { gap: 8px; }
.gap-12 { gap: 12px; }
.gap-16 { gap: 16px; }

.w-full { width: 100%; }
.rounded { border-radius: var(--radius); }
.rounded-lg { border-radius: var(--radius-lg); }

.divider {
  height: 1px;
  background: var(--gray-200);
  margin: 20px 0;
}

.icon-box {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  flex-shrink: 0;
}

/* ===================================
   Accordion
   =================================== */

.accordion-item {
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  margin-bottom: 8px;
  overflow: hidden;
}

.accordion-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  cursor: pointer;
  user-select: none;
  background: var(--white);
  transition: background 0.15s;
}

.accordion-header:hover { background: var(--gray-50); }

.accordion-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--gray-800);
}

.accordion-arrow {
  color: var(--gray-400);
  transition: transform 0.25s;
}

.accordion-item.open .accordion-arrow { transform: rotate(90deg); }

.accordion-body {
  display: none;
  padding: 12px 16px;
  background: var(--gray-50);
  border-top: 1px solid var(--gray-100);
  font-size: 12px;
  color: var(--gray-600);
  line-height: 1.8;
}

.accordion-item.open .accordion-body { display: block; }

/* ===================================
   底部
   =================================== */

.site-footer {
  background: var(--gray-900);
  color: var(--gray-400);
  padding: 40px 0;
  margin-top: 64px;
}

.footer-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 32px;
}

.footer-brand .name {
  font-size: 16px;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 6px;
}

.footer-brand .desc {
  font-size: 12px;
  max-width: 260px;
  line-height: 1.7;
}

.footer-links {
  display: flex;
  gap: 32px;
  flex-wrap: wrap;
}

.footer-col-title {
  font-size: 12px;
  font-weight: 700;
  color: var(--gray-300);
  margin-bottom: 10px;
  text-transform: uppercase;
  letter-spacing: 0.07em;
}

.footer-col a {
  display: block;
  font-size: 12px;
  color: var(--gray-500);
  text-decoration: none;
  margin-bottom: 6px;
  transition: color 0.15s;
}

.footer-col a:hover { color: var(--gray-300); }

.footer-bottom {
  max-width: 1280px;
  margin: 24px auto 0;
  padding: 16px 24px 0;
  border-top: 1px solid var(--gray-800);
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  color: var(--gray-600);
  flex-wrap: wrap;
  gap: 8px;
}

/* ===================================
   返回顶部
   =================================== */

.back-top {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 40px;
  height: 40px;
  background: var(--primary);
  color: white;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  font-size: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
  z-index: 50;
}

.back-top.visible {
  opacity: 1;
  pointer-events: auto;
}

/* ===================================
   响应式
   =================================== */

@media (max-width: 640px) {
  .hero h1 { font-size: 26px; }
  .hero-stats { gap: 20px; }
  .wireframe-container { grid-template-columns: 1fr; }
  .spec-grid { grid-template-columns: 1fr; }
  .pros-cons { grid-template-columns: 1fr; }
}

/* ===================================
   员工端深色主题 — SA Dark Theme
   覆盖所有 .page-spec-* 和 .spec-* 组件
   在深色背景 (#1e1b4b) section 内生效
   =================================== */

/* 卡片容器 */
.sa-dark .page-spec-card {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.18) !important;
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 20px;
  backdrop-filter: blur(4px);
}

/* 卡片头部（折叠状态） */
.sa-dark .page-spec-header {
  background: rgba(255, 255, 255, 0.08) !important;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.sa-dark .page-spec-header:hover {
  background: rgba(255, 255, 255, 0.14) !important;
}

/* 卡片头部展开状态 */
.sa-dark .page-spec-header.expanded {
  background: rgba(255, 255, 255, 0.10) !important;
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
}

/* 页面名称与ID文字 */
.sa-dark .page-spec-name {
  color: #ffffff !important;
  font-size: 15px;
  font-weight: 700;
}

.sa-dark .page-spec-id {
  color: rgba(255, 255, 255, 0.5) !important;
}

/* 展开箭头 */
.sa-dark .page-spec-expand {
  color: rgba(255, 255, 255, 0.45) !important;
}

/* 卡片展开体 */
.sa-dark .page-spec-body {
  background: rgba(0, 0, 0, 0.28) !important;
  padding: 24px 20px;
}

/* spec 小节标题（如 🎯 页面目标） */
.sa-dark .spec-section-title {
  color: rgba(255, 255, 255, 0.45) !important;
  border-bottom: 1px solid rgba(255, 255, 255, 0.10);
  letter-spacing: 0.06em;
}

/* spec 列表行 */
.sa-dark .spec-item {
  color: rgba(255, 255, 255, 0.82) !important;
  border-bottom: 1px dashed rgba(255, 255, 255, 0.10);
  font-size: 13px;
  line-height: 1.6;
}

.sa-dark .spec-item:last-child {
  border-bottom: none;
}

/* spec 圆点颜色保持原色，深色背景下更醒目 */
.sa-dark .spec-item-dot {
  background: rgba(147, 197, 253, 0.9); /* 浅蓝 */
}

.sa-dark .spec-item-dot.warn {
  background: #fbbf24; /* 黄 */
}

.sa-dark .spec-item-dot.success {
  background: #34d399; /* 绿 */
}

.sa-dark .spec-item-dot.danger {
  background: #f87171; /* 红 */
}

/* 状态 badge 列表 */
.sa-dark .spec-state-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

/* 跳转关系列表 */
.sa-dark .spec-flow-item {
  color: rgba(255, 255, 255, 0.75) !important;
  font-size: 12px;
  padding: 3px 0;
}

/* API 接口列表项 */
.sa-dark .spec-api-item {
  background: rgba(255, 255, 255, 0.08) !important;
  color: rgba(255, 255, 255, 0.75) !important;
  border: 1px solid rgba(255, 255, 255, 0.10);
  font-family: 'Courier New', 'SFMono-Regular', monospace;
  font-size: 11px;
  border-radius: var(--radius-sm);
  padding: 6px 10px;
  margin-bottom: 5px;
  word-break: break-all;
}

/* text-sm 通用文字（页面目标描述）*/
.sa-dark .text-sm {
  color: rgba(255, 255, 255, 0.82) !important;
  line-height: 1.85;
}

/* grid-2 内的小卡片（G3客户详情四象限） */
.sa-dark .grid-2 > div {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
}

/* spec-section 间距 */
.sa-dark .spec-section {
  margin-bottom: 18px;
}

/* 展开按钮（展开全部） */
.sa-dark [data-expand-all] {
  border: 1px solid rgba(255, 255, 255, 0.35) !important;
  color: rgba(255, 255, 255, 0.9) !important;
  background: rgba(255, 255, 255, 0.08) !important;
}

.sa-dark [data-expand-all]:hover {
  background: rgba(255, 255, 255, 0.16) !important;
}

/* 移动端适配 */
@media (max-width: 768px) {
  .sa-dark .spec-grid {
    grid-template-columns: 1fr;
  }
  .sa-dark .page-spec-body {
    padding: 16px;
  }
}

/* ===================================
   SA 状态 Badge 深色变体
   =================================== */
.sa-badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 600;
  white-space: nowrap;
}

.sa-badge.sa-badge-purple {
  background: rgba(139, 92, 246, 0.25);
  color: #c4b5fd;
  border: 1px solid rgba(139, 92, 246, 0.35);
}

.sa-badge.sa-badge-green {
  background: rgba(16, 185, 129, 0.2);
  color: #86efac;
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.sa-badge.sa-badge-yellow {
  background: rgba(245, 158, 11, 0.2);
  color: #fde68a;
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.sa-badge.sa-badge-red {
  background: rgba(239, 68, 68, 0.2);
  color: #fca5a5;
  border: 1px solid rgba(239, 68, 68, 0.3);
}

/* G3 客户详情四象限小卡片 */
.sa-dark .customer-detail-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-top: 6px;
}

.sa-dark .customer-detail-item {
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 8px;
  padding: 10px;
  font-size: 11px;
  color: rgba(255, 255, 255, 0.65);
  line-height: 1.8;
}

.sa-dark .customer-detail-item strong {
  color: rgba(255, 255, 255, 0.9);
  display: block;
  margin-bottom: 4px;
  font-size: 12px;
}

.sa-dark .customer-detail-item.ai-hint {
  background: rgba(139, 92, 246, 0.12);
  border-color: rgba(139, 92, 246, 0.3);
  color: rgba(255, 255, 255, 0.5);
}

.sa-dark .customer-detail-item.ai-hint strong {
  color: #c4b5fd;
}

/* sa-muted: 略暗的提示性文字（G5等 coming-soon 场景） */
.sa-dark .sa-muted {
  color: rgba(255, 255, 255, 0.55) !important;
  line-height: 1.9;
}

/* G5 AI分身 预埋卡片内嵌说明块 */
.sa-dark .ai-embed-card {
  background: rgba(139, 92, 246, 0.12);
  border: 1px solid rgba(139, 92, 246, 0.3);
  border-radius: 10px;
  padding: 16px;
}

.sa-dark .ai-embed-card .ai-embed-title {
  font-size: 13px;
  font-weight: 700;
  color: #c4b5fd;
  margin-bottom: 8px;
}

.sa-dark .ai-embed-card .ai-embed-body {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.65);
  line-height: 1.9;
}