/* ==========================================================================
   Choospark Web Portal - Luminous Analyst Design System
   ========================================================================== */

/* 引入 Google Fonts - Plus Jakarta Sans */
@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&display=swap');

/* --------------------------------------------------------------------------
   1. 变量与主题定义 (Design Tokens)
   -------------------------------------------------------------------------- */
:root {
  /* 浅色模式 (Light Mode) */
  --primary: #0088FF;
  --primary-rgb: 0, 136, 255;
  --primary-gradient: linear-gradient(135deg, #0088FF 0%, #0066CC 100%);
  --primary-hover: #0077EE;
  
  --background: #F6FAFE;
  --surface: #F6FAFE;
  
  --surface-container-lowest: #FFFFFF;
  --surface-container-low: #F0F4F8;
  --surface-container-high: #E2E8F0;
  --surface-container-highest: #CBD5E1;
  
  --on-surface: #171C1F;
  --on-surface-variant: #404754;
  --outline-variant: rgba(192, 201, 218, 0.25); /* 幽灵线条 (Ghost Border) */
  
  --shadow-sm: 0 2px 8px rgba(0, 136, 255, 0.04);
  --shadow-md: 0 10px 30px rgba(0, 136, 255, 0.06);
  --shadow-lg: 0 20px 50px rgba(0, 136, 255, 0.08);
  
  --glass-bg: rgba(255, 255, 255, 0.75);
  --glass-border: rgba(192, 201, 218, 0.18);
  --glass-shadow: 0 8px 32px 0 rgba(0, 136, 255, 0.04);
  
  --orb-1: rgba(0, 136, 255, 0.06);
  --orb-2: rgba(99, 102, 241, 0.06);
  
  --font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --radius-twelve: 12px;
  --radius-sixteen: 16px;
  --max-width: 1240px;
  --navbar-height: 80px;
  --transition-speed: 0.2s;
}

/* 强制/手动暗色模式或跟随系统 */
body.dark {
  /* 暗色模式 (Dark Mode) */
  --primary: #3DA9FF;
  --primary-rgb: 61, 169, 255;
  --primary-gradient: linear-gradient(135deg, #3DA9FF 0%, #0088FF 100%);
  --primary-hover: #5cb8ff;
  
  --background: #0B1220;
  --surface: #0B1220;
  
  --surface-container-lowest: #1A2436;
  --surface-container-low: #131B2C;
  --surface-container-high: #1F2A3F;
  --surface-container-highest: #25324A;
  
  --on-surface: #E6EDF3;
  --on-surface-variant: #A6B0BF;
  --outline-variant: rgba(42, 51, 70, 0.3);
  
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.25);
  --shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.35);
  
  --glass-bg: rgba(26, 36, 54, 0.7);
  --glass-border: rgba(42, 51, 70, 0.35);
  --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.3);
  
  --orb-1: rgba(61, 169, 255, 0.08);
  --orb-2: rgba(99, 102, 241, 0.08);
}

/* --------------------------------------------------------------------------
   2. 基础与布局重置 (Base & Resets)
   -------------------------------------------------------------------------- */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--navbar-height) + 24px);
}

body {
  font-family: var(--font-family);
  background-color: var(--background);
  color: var(--on-surface);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease;
  min-height: 100vh;
  position: relative;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color var(--transition-speed) ease, opacity var(--transition-speed) ease;
}

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

/* --------------------------------------------------------------------------
   3. 装饰发光背景 (Luminous Background Orbs)
   -------------------------------------------------------------------------- */
.bg-orbs {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  pointer-events: none;
  z-index: -1;
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(140px);
  will-change: transform;
}

.orb-top-right {
  top: -200px;
  right: -200px;
  width: 600px;
  height: 600px;
  background: var(--orb-1);
}

.orb-bottom-left {
  bottom: 10%;
  left: -200px;
  width: 500px;
  height: 500px;
  background: var(--orb-2);
}

/* --------------------------------------------------------------------------
   4. 玻璃拟态导航栏 (Glassmorphism Navbar)
   -------------------------------------------------------------------------- */
.navbar {
  position: sticky;
  top: 0;
  height: var(--navbar-height);
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
  z-index: 100;
  transition: background var(--transition-speed) ease, border-bottom var(--transition-speed) ease;
}

.navbar-container {
  max-width: var(--max-width);
  margin: 0 auto;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--on-surface);
}

.nav-logo-svg {
  width: 32px;
  height: 32px;
  fill: var(--primary);
  filter: drop-shadow(0 2px 8px rgba(var(--primary-rgb), 0.3));
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 20px;
}

.nav-link {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--on-surface-variant);
  padding: 8px 16px;
  border-radius: var(--radius-twelve);
  transition: all var(--transition-speed) ease;
}

.nav-link:hover, .nav-link.active {
  color: var(--primary);
  background: rgba(var(--primary-rgb), 0.06);
}

/* 模式切换按钮 */
.theme-toggle {
  background: transparent;
  border: none;
  cursor: pointer;
  width: 42px;
  height: 42px;
  border-radius: var(--radius-twelve);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--on-surface-variant);
  transition: all var(--transition-speed) ease;
  outline: none;
}

.theme-toggle:hover {
  background: rgba(var(--primary-rgb), 0.08);
  color: var(--primary);
}

.theme-toggle svg {
  width: 20px;
  height: 20px;
  fill: currentColor;
}

.theme-toggle .sun-icon {
  display: none;
}

body.dark .theme-toggle .moon-icon {
  display: none;
}

body.dark .theme-toggle .sun-icon {
  display: block;
}

/* --------------------------------------------------------------------------
   5. 主体布局 (Main Structure)
   -------------------------------------------------------------------------- */
.main-wrapper {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 40px 24px 80px 24px;
  display: flex;
  gap: 48px;
  position: relative;
}

/* --------------------------------------------------------------------------
   6. 侧边栏大纲导航 (Sidebar Outline - ScrollSpy)
   -------------------------------------------------------------------------- */
.sidebar {
  width: 280px;
  flex-shrink: 0;
  position: sticky;
  top: calc(var(--navbar-height) + 40px);
  max-height: calc(100vh - var(--navbar-height) - 80px);
  overflow-y: auto;
  padding-right: 12px;
  scrollbar-width: thin;
  scrollbar-color: var(--outline-variant) transparent;
}

/* 自定义滚动条 */
.sidebar::-webkit-scrollbar {
  width: 4px;
}

.sidebar::-webkit-scrollbar-track {
  background: transparent;
}

.sidebar::-webkit-scrollbar-thumb {
  background: var(--outline-variant);
  border-radius: 4px;
}

.sidebar-title {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--on-surface-variant);
  margin-bottom: 16px;
  opacity: 0.8;
}

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

.outline-item a {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--on-surface-variant);
  padding: 8px 12px;
  border-radius: 8px;
  border-left: 2px solid transparent;
  transition: all var(--transition-speed) ease;
}

.outline-item a:hover {
  color: var(--primary);
  background: rgba(var(--primary-rgb), 0.04);
}

.outline-item.active a {
  color: var(--primary);
  font-weight: 600;
  border-left-color: var(--primary);
  background: rgba(var(--primary-rgb), 0.06);
}

/* --------------------------------------------------------------------------
   7. 文档正文区域 (Document Body)
   -------------------------------------------------------------------------- */
.doc-content {
  flex-grow: 1;
  min-width: 0; /* 防止 Flex 子项溢出 */
}

.doc-header {
  margin-bottom: 40px;
}

.doc-meta {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--primary);
  margin-bottom: 12px;
}

.doc-title {
  font-size: 2.5rem;
  font-weight: 800;
  line-height: 1.2;
  color: var(--on-surface);
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.doc-subtitle {
  font-size: 1.1rem;
  color: var(--on-surface-variant);
  line-height: 1.5;
}

/* 幽灵线 (代替 HR) */
.ghost-divider {
  height: 1px;
  background: var(--outline-variant);
  margin: 32px 0;
  border: none;
}

/* 正文排版 */
.article-section {
  margin-bottom: 48px;
}

.article-section h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--on-surface);
  margin-bottom: 18px;
  letter-spacing: -0.01em;
  scroll-margin-top: calc(var(--navbar-height) + 24px);
}

.article-section p {
  font-size: 0.95rem;
  color: var(--on-surface-variant);
  margin-bottom: 16px;
  line-height: 1.75;
}

.article-section h3 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--on-surface);
  margin-top: 24px;
  margin-bottom: 12px;
  scroll-margin-top: calc(var(--navbar-height) + 24px);
}

.article-section ul, .article-section ol {
  margin-left: 20px;
  margin-bottom: 18px;
  color: var(--on-surface-variant);
}

.article-section li {
  font-size: 0.95rem;
  margin-bottom: 8px;
  line-height: 1.6;
}

/* 拟态卡片 (Glassmorphism Cards) */
.info-card {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-twelve);
  padding: 24px;
  margin: 28px 0;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-speed) ease;
}

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

.info-card-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--on-surface);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.info-card-title svg {
  width: 20px;
  height: 20px;
  fill: var(--primary);
}

.info-card p {
  margin-bottom: 0;
  font-size: 0.9rem;
}

/* 重点标注 */
.highlight-badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 4px 8px;
  border-radius: 6px;
  background: rgba(var(--primary-rgb), 0.08);
  color: var(--primary);
  margin-bottom: 12px;
}

/* 底部页脚 */
.doc-footer {
  text-align: center;
  padding: 40px 0 20px 0;
  margin-top: 60px;
  font-size: 0.8rem;
  color: var(--on-surface-variant);
  opacity: 0.7;
}

/* --------------------------------------------------------------------------
   8. 移动端目录悬浮按钮与抽屉菜单
   -------------------------------------------------------------------------- */
.mobile-outline-trigger {
  display: none;
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 90;
  background: var(--primary-gradient);
  color: #FFFFFF;
  border: none;
  border-radius: 50%;
  width: 56px;
  height: 56px;
  box-shadow: 0 4px 20px rgba(var(--primary-rgb), 0.4);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-speed) ease;
}

.mobile-outline-trigger:hover {
  transform: translateY(-4px) scale(1.05);
  box-shadow: 0 6px 24px rgba(var(--primary-rgb), 0.5);
}

.mobile-outline-trigger svg {
  width: 24px;
  height: 24px;
  fill: currentColor;
}

/* 移动端侧栏遮罩层 */
.mobile-drawer-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 101;
  opacity: 0;
  transition: opacity var(--transition-speed) ease;
}

.mobile-drawer-overlay.active {
  display: block;
  opacity: 1;
}

/* 移动端侧边抽屉 */
.mobile-drawer {
  position: fixed;
  top: 0;
  right: -320px;
  width: 300px;
  height: 100vh;
  background: var(--surface-container-lowest);
  box-shadow: var(--shadow-lg);
  z-index: 102;
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  transition: right var(--transition-speed) cubic-bezier(0.16, 1, 0.3, 1);
}

.mobile-drawer.active {
  right: 0;
}

.mobile-drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.mobile-drawer-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--on-surface);
}

.mobile-drawer-close {
  background: transparent;
  border: none;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-twelve);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--on-surface-variant);
  cursor: pointer;
}

.mobile-drawer-close:hover {
  background: rgba(var(--primary-rgb), 0.08);
  color: var(--primary);
}

.mobile-drawer-close svg {
  width: 20px;
  height: 20px;
  fill: currentColor;
}

.mobile-drawer .outline-list {
  overflow-y: auto;
  flex-grow: 1;
}

/* --------------------------------------------------------------------------
   9. 响应式布局媒体查询 (Responsive)
   -------------------------------------------------------------------------- */
@media (max-width: 992px) {
  .sidebar {
    display: none; /* 在中屏及以下隐藏常规侧栏 */
  }
  
  .main-wrapper {
    padding-top: 24px;
  }
  
  .mobile-outline-trigger {
    display: flex; /* 开启悬浮按钮 */
  }
}

@media (max-width: 768px) {
  .doc-title {
    font-size: 2rem;
  }
  
  .navbar-container {
    padding: 0 16px;
  }
  
  .main-wrapper {
    padding-left: 16px;
    padding-right: 16px;
    gap: 0;
  }
}

@media (max-width: 480px) {
  .nav-brand span {
    display: none; /* 极窄屏幕隐藏 App 文字标识 */
  }
  
  .doc-title {
    font-size: 1.75rem;
  }
  
  .info-card {
    padding: 16px;
  }
}

/* --------------------------------------------------------------------------
   10. 简约模式 (Minimal Mode — no navbar)
   -------------------------------------------------------------------------- */
body.minimal {
  /* 顶部不再需要为导航栏预留高度 */
  --navbar-height: 0px;
}

body.minimal .main-wrapper {
  padding-top: 64px;
  padding-bottom: 80px;
}

body.minimal .sidebar {
  top: 40px;
  max-height: calc(100vh - 80px);
}

body.minimal .doc-title {
  font-size: 2.25rem;
}

body.minimal .doc-meta {
  font-size: 0.7rem;
  opacity: 0.6;
}

body.minimal .doc-header {
  margin-bottom: 32px;
}

/* 简约模式下卡片减少视觉重量 */
body.minimal .info-card {
  background: var(--surface-container-low);
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  border: none;
  box-shadow: none;
}

body.minimal .info-card:hover {
  transform: none;
  box-shadow: none;
}

/* 简约模式下移动端 FAB 颜色更低调 */
body.minimal .mobile-outline-trigger {
  background: var(--on-surface-variant);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
}

body.minimal .mobile-outline-trigger:hover {
  background: var(--primary);
  box-shadow: 0 6px 20px rgba(var(--primary-rgb), 0.3);
}