/* ===== Claude Code 教程站点 - 官方配色（code.claude.com 同款） ===== */

:root {
  /* Claude 官方主色：Clay 橙 */
  --primary-color: #c6613f;        /* clay-deep */
  --primary-hover: #d97757;        /* clay */
  --primary-light: rgba(217, 119, 87, 0.08);
  --accent-cyan: #c6613f;
  --accent-orange: #d97757;

  /* Light mode 背景（官方 light 主题） */
  --bg-primary: #ffffff;           /* gray-000 */
  --bg-secondary: #faf9f4;         /* off-white 卡片背景 */
  --bg-tertiary: #f0eee6;          /* gray-150 */

  /* 文字 */
  --text-primary: #141413;         /* slate */
  --text-secondary: #3d3d3a;       /* gray-700 */
  --text-muted: #73726c;           /* gray-550 */

  /* 边框 */
  --border-color: rgba(31, 30, 29, 0.15);   /* border-default */
  --border-light: rgba(31, 30, 29, 0.08);   /* border-subtle */

  /* 代码 */
  --code-bg: #141413;
  --code-text: #f0eee6;

  /* 兼容 */
  --accent-color: var(--primary-color);
  --accent-hover: var(--primary-hover);
  --warning-color: #d97757;
  --success-color: #5b8c52;
  --sidebar-width: 280px;

  /* 字体 */
  --font-sans: 'Anthropic Sans', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, 'Courier New', monospace;
}

/* Dark mode（官方 dark 主题） */
.dark, [data-theme="dark"] {
  --bg-primary: #1f1e1d;           /* gray-150 dark */
  --bg-secondary: #262624;         /* gray-000 dark = 卡片 */
  --bg-tertiary: #2d2c2a;
  --text-primary: #f0eee6;         /* slate dark */
  --text-secondary: #bfbdb4;       /* gray-700 dark */
  --text-muted: #91908a;           /* gray-550 dark */
  --border-color: rgba(240, 238, 230, 0.14);
  --border-light: rgba(240, 238, 230, 0.08);
  --primary-light: rgba(217, 119, 87, 0.12);
  --code-bg: #141413;
  --code-text: #f0eee6;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  font-size: 15px;
  min-height: 100vh;
}

/* 滚动条 */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg-secondary); }
::-webkit-scrollbar-thumb { background: var(--border-light); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

a {
  color: var(--primary-color);
  text-decoration: none;
  transition: color 0.2s ease;
}
a:hover { color: var(--primary-hover); }

/* ===== 顶部 Navbar ===== */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 60px;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
}
.dark .navbar { background: rgba(31, 30, 29, 0.85); }
.navbar-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
}
.navbar-brand:hover { color: var(--primary-color); }
.navbar-brand .logo {
  width: 32px; height: 32px;
  background: var(--primary-color);
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.5px;
}
.navbar-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}
.navbar-nav a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  padding: 8px 14px;
  border-radius: 6px;
  transition: all 0.2s ease;
}
.navbar-nav a:hover {
  color: var(--text-primary);
  background: var(--bg-tertiary);
}
.navbar-nav a.active {
  color: var(--primary-color);
  background: var(--primary-light);
}
.navbar-right { display: flex; align-items: center; gap: 10px; }

.theme-toggle {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 7px 9px;
  cursor: pointer;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s ease;
}
.theme-toggle:hover {
  color: var(--primary-color);
  border-color: var(--primary-color);
}
.dark .theme-toggle svg circle { display: none; }
.dark .theme-toggle svg path { d: path('M21 12.79A9 9 0 1 1 11.21 3 7 7 0 0 0 21 12.79z'); }

/* ===== Hero ===== */
.hero {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 60px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 100px 40px 80px;
}
.hero-content { flex: 1; max-width: 680px; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: rgba(217, 119, 87, 0.08);
  border: 1px solid rgba(217, 119, 87, 0.25);
  border-radius: 20px;
  font-size: 0.85rem;
  color: var(--primary-color);
  margin-bottom: 28px;
}
.hero-badge .badge-dot {
  width: 8px; height: 8px;
  background: var(--primary-color);
  border-radius: 50%;
  display: inline-block;
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}
.hero-title {
  margin-bottom: 28px;
  line-height: 1.15;
}
.hero-title .title-highlight {
  display: block;
  font-size: 4rem;
  font-weight: 800;
  font-style: italic;
  color: var(--primary-color);
  margin-bottom: 6px;
  line-height: 1.05;
  letter-spacing: -0.02em;
}
.hero-title .title-dark {
  display: block;
  font-size: 2.8rem;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.15;
}
.hero-description {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 580px;
  line-height: 1.85;
  margin-bottom: 36px;
}
.hero-buttons {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 26px;
  background: var(--primary-color);
  color: white;
  border-radius: 10px;
  font-size: 0.95rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
}
.btn-primary:hover {
  background: var(--primary-hover);
  color: white;
  transform: translateY(-2px);
  box-shadow: 0 8px 16px rgba(217, 119, 87, 0.3);
}
.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 26px;
  background: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  font-size: 0.95rem;
  font-weight: 600;
  transition: all 0.2s ease;
}
.btn-outline:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  transform: translateY(-2px);
}
.hero-stats {
  display: flex;
  gap: 36px;
  flex-wrap: wrap;
  padding-top: 8px;
  border-top: 1px solid var(--border-color);
  padding-top: 24px;
}
.hero-stat .stat-num {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--primary-color);
  line-height: 1.2;
}
.hero-stat .stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 4px;
}
.hero-right { flex-shrink: 0; }
.hero-visual {
  width: 360px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  padding: 20px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

/* Hero 右侧二维码卡片 */
.hero-qr-section {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.hero-qr-card {
  display: flex;
  align-items: center;
  gap: 16px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  padding: 16px;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
  min-width: 320px;
}
.hero-qr-card:hover {
  transform: translateY(-3px);
  border-color: var(--primary-color);
  box-shadow: 0 12px 24px rgba(217, 119, 87, 0.15);
}
.hero-qr-image {
  width: 96px;
  height: 96px;
  border-radius: 10px;
  overflow: hidden;
  background: #fff;
  flex-shrink: 0;
}
.hero-qr-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.hero-qr-info { display: flex; flex-direction: column; gap: 4px; }
.hero-qr-info .qr-label {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
}
.hero-qr-info .qr-text {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.55;
}
.hero-visual .terminal-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding-bottom: 12px;
  margin-bottom: 12px;
  border-bottom: 1px solid var(--border-color);
}
.hero-visual .terminal-bar .dot {
  width: 12px; height: 12px; border-radius: 50%;
}
.hero-visual .terminal-bar .dot:nth-child(1) { background: #ef4444; }
.hero-visual .terminal-bar .dot:nth-child(2) { background: #f59e0b; }
.hero-visual .terminal-bar .dot:nth-child(3) { background: #22c55e; }
.hero-visual .term-line { color: var(--text-secondary); margin: 4px 0; line-height: 1.6; }
.hero-visual .term-line.cmd { color: var(--text-primary); }
.hero-visual .term-line.cmd::before { content: '$ '; color: var(--primary-color); }
.hero-visual .term-line.out { color: var(--text-muted); padding-left: 14px; }
.hero-visual .term-line.hl { color: var(--accent-cyan); }

/* ===== Features Grid ===== */
.features {
  max-width: 1200px;
  margin: 0 auto;
  padding: 60px 40px;
}
.features-title {
  text-align: center;
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 12px;
  color: var(--text-primary);
}
.features-subtitle {
  text-align: center;
  color: var(--text-secondary);
  margin-bottom: 48px;
  font-size: 1rem;
}
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}
.feature-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  padding: 28px 24px;
  transition: all 0.25s ease;
}
.feature-card:hover {
  border-color: var(--primary-color);
  transform: translateY(-4px);
  box-shadow: 0 12px 24px rgba(217, 119, 87, 0.12);
}
.feature-icon {
  width: 48px;
  height: 48px;
  background: var(--primary-light);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin-bottom: 16px;
}
.feature-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}
.feature-description {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.7;
}

/* ===== Parts (TOC on home) ===== */
.parts-section {
  max-width: 1280px;
  margin: 0 auto;
  padding: 40px 40px 80px;
}
.parts-section-header {
  text-align: center;
  margin-bottom: 48px;
}
.parts-section-header h2 {
  font-size: 2rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 8px;
}
.parts-section-header p {
  color: var(--text-secondary);
}
.parts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(420px, 1fr));
  gap: 24px;
}
.part-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  padding: 28px;
  transition: all 0.25s ease;
}
.part-card:hover {
  border-color: var(--primary-color);
  box-shadow: 0 8px 20px rgba(217, 119, 87, 0.12);
}
.part-card .part-num {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--primary-color);
  background: var(--primary-light);
  padding: 4px 10px;
  border-radius: 6px;
  margin-bottom: 12px;
}
.part-card h2 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 18px;
  line-height: 1.4;
}
.part-card h3 {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin: 18px 0 8px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.part-card .doc-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.part-card .doc-list li { margin: 2px 0; }
.part-card .doc-list a {
  color: var(--text-secondary);
  font-size: 0.85rem;
  padding: 5px 10px;
  border-radius: 6px;
  display: block;
  transition: all 0.15s ease;
  border-left: 2px solid transparent;
}
.part-card .doc-list a:hover {
  background: var(--bg-tertiary);
  color: var(--primary-color);
  border-left-color: var(--primary-color);
  padding-left: 12px;
}

/* ===== Tutorial 页面布局 ===== */
.container { display: flex; min-height: 100vh; }

.sidebar {
  position: fixed;
  top: 60px; left: 0; bottom: 0;
  width: var(--sidebar-width);
  background: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  overflow-y: auto;
  padding: 16px 0;
  z-index: 900;
  transition: transform 0.3s ease;
}
.sidebar-header {
  padding: 16px 20px 8px;
  margin-bottom: 8px;
  display: none; /* 顶栏已经有品牌，sidebar header 隐藏 */
}
.nav-section { margin-bottom: 18px; }
.nav-section-title {
  padding: 8px 22px 6px;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
}
.nav-item {
  display: block;
  padding: 7px 22px;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.85rem;
  transition: all 0.15s ease;
  border-left: 3px solid transparent;
  line-height: 1.5;
}
.nav-item:hover {
  color: var(--text-primary);
  background: var(--bg-tertiary);
}
.nav-item.active {
  color: var(--primary-color);
  background: var(--primary-light);
  border-left-color: var(--primary-color);
}
.nav-item.sub { padding-left: 28px; font-size: 0.82rem; }

.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  margin-top: 60px;
  padding: 48px 60px 80px;
  max-width: 920px;
  min-height: calc(100vh - 60px);
}

.breadcrumb {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 16px;
}
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--primary-color); }

/* ===== 文章正文（markdown-body） ===== */
.markdown-body { color: var(--text-secondary); }
.markdown-body h1 {
  font-size: 2.25rem;
  font-weight: 800;
  margin: 0 0 28px;
  padding-bottom: 18px;
  border-bottom: 2px solid var(--primary-color);
  color: var(--text-primary);
  line-height: 1.25;
}
.markdown-body h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 40px 0 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-primary);
}
.markdown-body h3 {
  font-size: 1.18rem;
  font-weight: 600;
  margin: 28px 0 12px;
  color: var(--text-primary);
}
.markdown-body h4 {
  font-size: 1rem;
  font-weight: 600;
  margin: 20px 0 10px;
  color: var(--primary-color);
}
.markdown-body p, .markdown-body li {
  color: var(--text-secondary);
  margin-bottom: 14px;
  line-height: 1.85;
}
.markdown-body ul, .markdown-body ol { padding-left: 26px; margin-bottom: 16px; }
.markdown-body strong { color: var(--text-primary); font-weight: 700; }
.markdown-body blockquote {
  background: rgba(217, 119, 87, 0.06);
  border-left: 4px solid var(--primary-color);
  padding: 14px 20px;
  border-radius: 0 8px 8px 0;
  margin: 16px 0;
  color: var(--text-secondary);
}
.markdown-body blockquote p { margin: 6px 0; color: var(--text-secondary); }
.markdown-body img { max-width: 100%; border-radius: 8px; margin: 16px 0; }
.markdown-body a { color: var(--primary-color); border-bottom: 1px solid transparent; }
.markdown-body a:hover { border-bottom-color: var(--primary-color); }

/* 代码 */
.markdown-body :not(pre) > code {
  background: var(--bg-tertiary);
  color: var(--primary-color);
  padding: 2px 7px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.85em;
  border: 1px solid var(--border-color);
}
.markdown-body pre {
  background: var(--code-bg);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 16px 18px;
  overflow-x: auto;
  margin: 18px 0;
  font-size: 0.85rem;
  line-height: 1.7;
}
.markdown-body pre code {
  background: transparent;
  border: none;
  padding: 0;
  color: var(--code-text);
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

/* 表格 */
.markdown-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 18px 0;
  font-size: 0.9rem;
  background: var(--bg-secondary);
  border-radius: 8px;
  overflow: hidden;
}
.markdown-body th, .markdown-body td {
  padding: 10px 14px;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}
.markdown-body th {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  font-weight: 600;
  font-size: 0.85rem;
}
.markdown-body td { color: var(--text-secondary); }
.markdown-body tr:last-child td { border-bottom: none; }

/* 上下页 */
.page-nav {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-top: 60px;
  padding-top: 28px;
  border-top: 1px solid var(--border-color);
}
.page-nav a {
  flex: 1;
  padding: 18px 20px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  color: var(--text-secondary);
  transition: all 0.2s ease;
}
.page-nav a:hover {
  border-color: var(--primary-color);
  background: var(--bg-tertiary);
  transform: translateY(-2px);
}
.page-nav a .label {
  display: block;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 4px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.page-nav a.next { text-align: right; }

/* 页脚 */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 32px 24px;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-top: 80px;
}
.footer a { color: var(--text-muted); }
.footer a:hover { color: var(--primary-color); }
.footer-links {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}

/* 移动端 */
.menu-toggle {
  display: none;
  position: fixed;
  top: 14px; left: 14px;
  z-index: 1100;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 8px;
  cursor: pointer;
  color: var(--text-primary);
}

/* 响应式 */
@media (max-width: 1024px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); }
  .main-content { margin-left: 0; padding: 30px 20px; }
  .menu-toggle { display: block; }
  .navbar { padding: 0 14px; }
  .navbar-nav { display: none; }
}
@media (max-width: 900px) {
  .hero { flex-direction: column; padding: 60px 20px; gap: 40px; }
  .hero-content { max-width: 100%; }
  .hero-title .title-highlight { font-size: 2.6rem; }
  .hero-title .title-dark { font-size: 2rem; }
  .hero-visual { width: 100%; }
  .parts-grid { grid-template-columns: 1fr; }
  .parts-section, .features { padding: 40px 20px; }
}

/* highlight.js 适配双主题 */
.hljs {
  background: var(--code-bg) !important;
  color: var(--code-text) !important;
  border-radius: 10px;
}