/* ============================================================
 * CSL算力中心 Docs — 现代专业版 UI 设计
 * 设计：渐变光效 / 流畅动画 / 响应式布局 / 专业交互
 * ============================================================ */

:root {
  /* 主色调 - 专业渐变色系 */
  --primary: #8b5cf6;
  --primary-light: #a78bfa;
  --primary-dark: #7c3aed;
  --secondary: #ec4899;
  --accent: #06b6d4;

  --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  --gradient-accent: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  --gradient-hero: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);

  /* 中性色 */
  --bg: #fafbfc;
  --bg-alt: #f3f4f6;
  --surface: #ffffff;
  --surface-hover: #f9fafb;
  --ink: #1f2937;
  --ink-light: #6b7280;
  --ink-lighter: #9ca3af;
  --border: #e5e7eb;
  --border-light: #f3f4f6;

  /* 语义色 */
  --success: #10b981;
  --warning: #f59e0b;
  --error: #ef4444;
  --info: #3b82f6;

  /* 阴影系统 */
  --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  --shadow-glow: 0 0 30px rgba(139, 92, 246, 0.3);

  /* 圆角 */
  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  /* 间距 */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;

  /* 尺寸 */
  --sidebar-w: 280px;
  --toc-w: 220px;
  --max-content: 1400px;

  /* 过渡 */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);

  color-scheme: light;
}

/* 深色主题 */
[data-theme="dark"] {
  --bg: #0f172a;
  --bg-alt: #1e293b;
  --surface: #1e293b;
  --surface-hover: #334155;
  --ink: #f1f5f9;
  --ink-light: #cbd5e1;
  --ink-lighter: #94a3b8;
  --border: #334155;
  --border-light: #1e293b;

  --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.4), 0 1px 2px -1px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -2px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -4px rgba(0, 0, 0, 0.4);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.4), 0 8px 10px -6px rgba(0, 0, 0, 0.4);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 30px rgba(139, 92, 246, 0.5);

  color-scheme: dark;
}

/* ============================================================
 * 基础样式
 * ============================================================ */

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--ink);
  background: var(--bg);
  min-height: 100vh;
  transition: background var(--transition-base), color var(--transition-base);
  overflow-x: hidden;
}

/* 文字选择 */
::selection {
  background: rgba(139, 92, 246, 0.2);
  color: var(--ink);
}

/* 滚动条美化 */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: var(--bg-alt);
  border-radius: 10px;
}

::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 10px;
  border: 2px solid var(--bg-alt);
  transition: background var(--transition-fast);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--primary-light);
}

/* 链接样式 */
a {
  color: var(--primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

/* 代码字体 */
code, pre, kbd {
  font-family: "SF Mono", "JetBrains Mono", "Fira Code", Consolas, "Liberation Mono", Menlo, Courier, monospace;
}

/* ============================================================
 * 樱花飘落动画优化
 * ============================================================ */

.sakura-layer {
  position: fixed;
  inset: 0;
  z-index: 9999;
  pointer-events: none !important;
  overflow: hidden;
  opacity: 0.7;
}

.petal {
  position: absolute;
  top: -30px;
  font-size: 20px;
  color: rgba(139, 92, 246, 0.4);
  animation: fall linear infinite;
  will-change: transform;
  pointer-events: none !important;
  filter: drop-shadow(0 2px 4px rgba(139, 92, 246, 0.2));
}

[data-theme="dark"] .petal {
  color: rgba(167, 139, 250, 0.3);
}

@keyframes fall {
  0% {
    transform: translate3d(0, -10vh, 0) rotate(0deg);
    opacity: 0;
  }
  10% {
    opacity: 1;
  }
  90% {
    opacity: 1;
  }
  100% {
    transform: translate3d(20vw, 110vh, 0) rotate(720deg);
    opacity: 0;
  }
}

/* 不同樱花的动画时长和延迟 */
.p1 { left: 10%; animation-duration: 12s; animation-delay: 0s; }
.p2 { left: 20%; animation-duration: 15s; animation-delay: 2s; }
.p3 { left: 35%; animation-duration: 11s; animation-delay: 4s; }
.p4 { left: 50%; animation-duration: 14s; animation-delay: 1s; }
.p5 { left: 65%; animation-duration: 13s; animation-delay: 3s; }
.p6 { left: 75%; animation-duration: 16s; animation-delay: 5s; }
.p7 { left: 85%; animation-duration: 12s; animation-delay: 6s; }
.p8 { left: 95%; animation-duration: 14s; animation-delay: 7s; }

/* ============================================================
 * 顶部导航栏
 * ============================================================ */

.topbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border);
  transition: all var(--transition-base);
}

[data-theme="dark"] .topbar {
  background: rgba(15, 23, 42, 0.8);
}

.topbar.scrolled {
  background: rgba(255, 255, 255, 0.95);
  box-shadow: var(--shadow-sm);
}

[data-theme="dark"] .topbar.scrolled {
  background: rgba(15, 23, 42, 0.95);
}

.topbar-inner {
  max-width: var(--max-content);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
  padding: var(--spacing) var(--spacing-lg);
}

/* Logo品牌 */
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
  transition: transform var(--transition-base);
}

.brand:hover {
  transform: translateY(-2px);
  text-decoration: none;
}

.brand-mark {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--gradient-primary);
  display: grid;
  place-items: center;
  box-shadow: var(--shadow-glow);
  overflow: hidden;
  animation: subtle-float 3s ease-in-out infinite;
  position: relative;
}

.brand-mark::before {
  content: "";
  position: absolute;
  inset: -50%;
  background: conic-gradient(from 0deg, transparent, rgba(255,255,255,0.3), transparent);
  animation: rotate 4s linear infinite;
}

@keyframes subtle-float {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-4px) rotate(2deg); }
}

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

.brand-mark img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  position: relative;
  z-index: 1;
  border-radius: 10px;
}

.brand-text strong {
  display: block;
  font-size: 18px;
  font-weight: 800;
  line-height: 1;
  color: var(--ink);
  letter-spacing: 0;
}

.brand-text em {
  display: block;
  font-size: 13px;
  font-weight: 600;
  line-height: 1;
  color: var(--primary);
  font-style: normal;
  margin-top: 4px;
}

.brand-text small {
  display: block;
  font-size: 11px;
  color: var(--ink-lighter);
  margin-top: 2px;
}

/* 顶部导航 */
.topnav {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  flex: 1 1 auto;
  justify-content: center;
}

.topnav a {
  padding: var(--spacing-sm) var(--spacing);
  border-radius: var(--radius-sm);
  color: var(--ink-light);
  font-size: 14px;
  font-weight: 600;
  transition: all var(--transition-fast);
  position: relative;
}

.topnav a::before {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 80%;
  height: 2px;
  background: var(--gradient-primary);
  border-radius: 2px;
  transition: transform var(--transition-base);
}

.topnav a:hover {
  color: var(--ink);
  background: var(--bg-alt);
  text-decoration: none;
}

.topnav a:hover::before {
  transform: translateX(-50%) scaleX(1);
}

/* 顶部操作按钮 */
.top-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.contact-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: var(--spacing-sm) var(--spacing);
  background: var(--gradient-primary);
  color: white;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  box-shadow: var(--shadow-sm);
}

.contact-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  color: white;
  text-decoration: none;
}

.icon-btn {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--ink-light);
  cursor: pointer;
  display: grid;
  place-items: center;
  transition: all var(--transition-fast);
}

.icon-btn:hover {
  background: var(--bg-alt);
  color: var(--primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.icon-btn .i-moon { display: none; }
[data-theme="dark"] .icon-btn .i-sun { display: none; }
[data-theme="dark"] .icon-btn .i-moon { display: block; }

.nav-toggle {
  display: none;
}

/* 滚动进度条 */
.scroll-progress {
  position: absolute;
  bottom: 0;
  left: 0;
  height: 3px;
  background: var(--gradient-primary);
  width: 0%;
  transition: width 0.1s linear;
  box-shadow: 0 0 10px rgba(139, 92, 246, 0.5);
}

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

.layout {
  display: grid;
  grid-template-columns: var(--sidebar-w) minmax(0, 1fr) var(--toc-w);
  max-width: var(--max-content);
  margin: 0 auto;
  gap: 0;
  padding: 0 var(--spacing-lg);
}

.page {
  padding: var(--spacing-lg) var(--spacing-xl) var(--spacing-2xl);
  min-width: 0;
}

/* ============================================================
 * 侧边栏
 * ============================================================ */

.sidebar {
  position: sticky;
  top: 90px;
  align-self: start;
  max-height: calc(100vh - 100px);
  overflow-y: auto;
  overflow-x: hidden;
  padding: var(--spacing-lg) var(--spacing) var(--spacing-lg) 0;
  scrollbar-width: thin;
}

.sidebar-inner {
  display: flex;
  flex-direction: column;
  gap: var(--spacing);
}

/* 吉祥物卡片优化 */
.mascot-card {
  position: relative;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: var(--spacing);
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.05), rgba(236, 72, 153, 0.05));
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: all var(--transition-base);
}

.mascot-card::before {
  content: "";
  position: absolute;
  top: -50%;
  right: -50%;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.1), transparent 70%);
  animation: pulse-glow 3s ease-in-out infinite;
}

@keyframes pulse-glow {
  0%, 100% { opacity: 0.5; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.1); }
}

.mascot-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary-light);
}

.mascot-img {
  width: 60px;
  height: 60px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--gradient-primary);
  box-shadow: var(--shadow-glow);
  object-fit: cover;
  cursor: pointer;
  transition: transform var(--transition-base);
  position: relative;
  z-index: 1;
}

.mascot-img:hover {
  transform: scale(1.1) rotate(-10deg);
}

.mascot-bubble {
  font-size: 12px;
  color: var(--ink-light);
  line-height: 1.5;
  position: relative;
  z-index: 1;
}

.mascot-bubble p {
  margin: 0 0 4px;
}

.mascot-bubble strong {
  color: var(--primary-dark);
  font-weight: 700;
}

.mascot-tag {
  display: inline-block;
  margin-top: 4px;
  padding: 2px 8px;
  border-radius: 99px;
  background: rgba(139, 92, 246, 0.1);
  color: var(--primary);
  font-size: 10px;
  font-weight: 700;
}

/* 目录 */
.toc {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.toc-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  color: var(--ink-light);
  font-size: 13px;
  font-weight: 600;
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.toc-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--gradient-primary);
  transform: scaleY(0);
  transition: transform var(--transition-base);
}

.toc-item .num {
  font-size: 10px;
  font-weight: 800;
  color: var(--ink-lighter);
  background: var(--bg-alt);
  padding: 3px 7px;
  border-radius: 6px;
  flex: 0 0 auto;
  transition: all var(--transition-fast);
}

.toc-item:hover {
  background: var(--bg-alt);
  color: var(--ink);
  text-decoration: none;
  transform: translateX(4px);
}

.toc-item:hover .num {
  background: var(--primary-light);
  color: white;
}

.toc-item.active {
  background: linear-gradient(to right, rgba(139, 92, 246, 0.1), transparent);
  color: var(--primary-dark);
  font-weight: 700;
}

.toc-item.active::before {
  transform: scaleY(1);
}

.toc-item.active .num {
  background: var(--primary);
  color: white;
}

/* 侧边栏底部 */
.sidebar-foot {
  margin-top: auto;
  padding: var(--spacing);
  background: var(--bg-alt);
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.sidebar-foot p {
  margin: 0 0 var(--spacing-sm);
  font-size: 12px;
  color: var(--ink-lighter);
}

.sidebar-foot .btn {
  width: 100%;
  justify-content: center;
}

.side-cta {
  margin-bottom: 12px;
  padding: 12px;
  background: var(--surface);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  transition: all var(--transition-base);
}

.side-cta:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
  border-color: var(--primary-light);
}

.side-cta strong {
  display: block;
  font-size: 13px;
  color: var(--ink);
  margin-bottom: 4px;
  font-weight: 700;
}

.side-cta a {
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
}

.side-cta small {
  display: block;
  font-size: 11px;
  color: var(--ink-lighter);
  margin-top: 2px;
}

/* ============================================================
 * Hero 区域
 * ============================================================ */

.hero {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: var(--spacing-2xl);
  align-items: center;
  padding: var(--spacing-2xl) var(--spacing-xl);
  margin: var(--spacing-lg) 0 var(--spacing-xl);
  background: linear-gradient(135deg, rgba(102, 126, 234, 0.05), rgba(118, 75, 162, 0.05));
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-light);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.hero::before {
  content: "";
  position: absolute;
  top: -50%;
  right: -20%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.15), transparent 70%);
  border-radius: 50%;
  animation: float-gradient 20s ease-in-out infinite;
}

.hero::after {
  content: "";
  position: absolute;
  bottom: -40%;
  left: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(236, 72, 153, 0.1), transparent 70%);
  border-radius: 50%;
  animation: float-gradient 25s ease-in-out infinite reverse;
}

@keyframes float-gradient {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(20px, -20px) scale(1.1); }
  66% { transform: translate(-20px, 20px) scale(0.9); }
}

.hero-text {
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: var(--surface);
  border: 1px solid var(--primary-light);
  color: var(--primary-dark);
  border-radius: 99px;
  font-size: 12px;
  font-weight: 700;
  margin-bottom: var(--spacing);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
  animation: badge-pulse 2s ease-in-out infinite;
}

@keyframes badge-pulse {
  0%, 100% { transform: scale(1); box-shadow: var(--shadow-sm); }
  50% { transform: scale(1.05); box-shadow: var(--shadow-md); }
}

.hero h1 {
  margin: 0 0 var(--spacing);
  font-size: 52px;
  line-height: 1.1;
  font-weight: 900;
  letter-spacing: 0;
  color: var(--ink);
}

.grad-text {
  background: var(--gradient-hero);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  background-size: 200% 200%;
  animation: gradient-shift 8s ease infinite;
}

@keyframes gradient-shift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

.hero-sub {
  margin: 0 0 var(--spacing-lg);
  font-size: 16px;
  color: var(--ink-light);
  max-width: 540px;
  line-height: 1.7;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: var(--spacing-lg);
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  padding: 0;
  margin: 0;
  list-style: none;
}

.hero-tags li {
  padding: 6px 12px;
  border-radius: 99px;
  background: var(--surface);
  border: 1px solid var(--border);
  font-size: 12px;
  font-weight: 600;
  color: var(--ink-light);
  box-shadow: var(--shadow-xs);
  transition: all var(--transition-fast);
}

.hero-tags li:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
  border-color: var(--primary-light);
  color: var(--primary);
}

/* Hero 艺术装饰 */
.hero-art {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 400px;
  z-index: 1;
}

.hero-mascot {
  width: 280px;
  height: 280px;
  border-radius: 50%;
  background: var(--gradient-primary);
  box-shadow: var(--shadow-2xl), var(--shadow-glow);
  animation: mascot-float 6s ease-in-out infinite;
  object-fit: cover;
}

@keyframes mascot-float {
  0%, 100% {
    transform: translateY(0) rotate(-3deg);
    box-shadow: var(--shadow-2xl), 0 0 40px rgba(139, 92, 246, 0.3);
  }
  50% {
    transform: translateY(-20px) rotate(3deg);
    box-shadow: var(--shadow-2xl), 0 0 60px rgba(139, 92, 246, 0.5);
  }
}

.float-card {
  position: absolute;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  box-shadow: var(--shadow-lg);
  font-size: 13px;
  backdrop-filter: blur(10px);
  animation: card-drift 8s ease-in-out infinite;
}

.float-card .ic {
  font-size: 24px;
}

.float-card strong {
  display: block;
  color: var(--ink);
  font-size: 13px;
  font-weight: 700;
}

.float-card small {
  display: block;
  color: var(--ink-lighter);
  font-size: 11px;
}

.float-card.c1 {
  top: 10%;
  left: 0;
  animation-delay: 0s;
}

.float-card.c2 {
  top: 50%;
  right: 0;
  transform: translateY(-50%);
  animation-delay: 2s;
}

.float-card.c3 {
  bottom: 10%;
  left: 15%;
  animation-delay: 4s;
}

@keyframes card-drift {
  0%, 100% {
    transform: translateY(0) rotate(0deg);
  }
  25% {
    transform: translateY(-10px) rotate(1deg);
  }
  50% {
    transform: translateY(-5px) rotate(-1deg);
  }
  75% {
    transform: translateY(-15px) rotate(0.5deg);
  }
}

/* ============================================================
 * 按钮系统
 * ============================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
  width: 300px;
  height: 300px;
}

.btn:hover {
  text-decoration: none;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  color: white;
}

.btn-ghost {
  background: var(--surface);
  color: var(--ink);
  border-color: var(--border);
}

.btn-ghost:hover {
  background: var(--bg-alt);
  color: var(--primary);
  border-color: var(--primary-light);
}

.btn-mini {
  padding: 6px 12px;
  font-size: 12px;
  border-radius: 6px;
}

.btn-sm {
  padding: 8px 16px;
  font-size: 13px;
}

/* ============================================================
 * 文档区块
 * ============================================================ */

.doc-section {
  margin-top: var(--spacing-lg);
  padding: var(--spacing-xl);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
  scroll-margin-top: 100px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
}

.doc-section:hover {
  box-shadow: var(--shadow-md);
}

.section-head {
  margin-bottom: var(--spacing-lg);
}

.section-head h2 {
  margin: 0;
  font-size: 32px;
  line-height: 1.2;
  letter-spacing: 0;
  font-weight: 800;
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--ink);
}

.sec-emoji {
  font-size: 0.9em;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.1), rgba(236, 72, 153, 0.1));
  border-radius: 12px;
  filter: drop-shadow(0 2px 4px rgba(139, 92, 246, 0.2));
}

.section-head p {
  margin: 12px 0 0;
  color: var(--ink-light);
  font-size: 15px;
  max-width: 800px;
  line-height: 1.7;
}

.doc-section h3 {
  margin: var(--spacing-xl) 0 var(--spacing);
  font-size: 20px;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
}

.doc-section h3::before {
  content: "";
  width: 4px;
  height: 20px;
  border-radius: 4px;
  background: var(--gradient-primary);
  flex: 0 0 auto;
}

.doc-section h4 {
  margin: var(--spacing-lg) 0 var(--spacing-sm);
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
}

.doc-section p {
  color: var(--ink-light);
  font-size: 15px;
  line-height: 1.7;
  margin: var(--spacing-sm) 0;
}

.doc-section code {
  background: rgba(139, 92, 246, 0.08);
  padding: 3px 6px;
  border-radius: 4px;
  font-size: 0.9em;
  color: var(--primary-dark);
  border: 1px solid rgba(139, 92, 246, 0.1);
}

.doc-section ul,
.doc-section ol {
  color: var(--ink-light);
  font-size: 15px;
  line-height: 1.7;
  padding-left: 24px;
}

.doc-section li {
  margin: var(--spacing-sm) 0;
}

/* ============================================================
 * 购买流程区块优化
 * ============================================================ */

.purchase-flow-section {
  padding: var(--spacing-xl);
  border: 2px solid transparent;
  background: linear-gradient(var(--surface), var(--surface)) padding-box,
              var(--gradient-accent) border-box;
  box-shadow: var(--shadow-lg);
  position: relative;
}

.purchase-flow-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(79, 172, 254, 0.03), rgba(0, 242, 254, 0.03));
  border-radius: var(--radius-lg);
  z-index: 0;
}

.purchase-flow-section > * {
  position: relative;
  z-index: 1;
}

.support-banner {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: var(--spacing-lg);
  align-items: center;
  margin-bottom: var(--spacing-lg);
  padding: var(--spacing-lg);
  border-radius: var(--radius);
  border: 1px solid rgba(6, 182, 212, 0.2);
  background: linear-gradient(135deg, rgba(6, 182, 212, 0.05), rgba(16, 185, 129, 0.05));
  box-shadow: var(--shadow-md);
  overflow: hidden;
  position: relative;
}

.support-banner::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--gradient-accent);
}

.support-icon {
  width: 56px;
  height: 56px;
  display: grid;
  place-items: center;
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(6, 182, 212, 0.1), rgba(16, 185, 129, 0.1));
  border: 1px solid rgba(6, 182, 212, 0.2);
  font-size: 28px;
  box-shadow: var(--shadow-sm);
}

.support-badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  margin-bottom: var(--spacing-sm);
  border-radius: 99px;
  background: rgba(6, 182, 212, 0.1);
  color: var(--accent);
  border: 1px solid rgba(6, 182, 212, 0.2);
  font-size: 11px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.support-copy strong {
  display: block;
  color: var(--ink);
  font-size: clamp(18px, 2.5vw, 22px);
  line-height: 1.4;
  font-weight: 900;
  margin-bottom: var(--spacing-sm);
}

.support-copy code {
  font-size: 1em;
  color: white;
  background: var(--gradient-primary);
  border-radius: var(--radius-sm);
  padding: 4px 12px;
  box-shadow: var(--shadow-glow);
  border: none;
}

.support-copy p {
  margin: 0;
  color: var(--ink-light);
  font-size: 14px;
}

.purchase-panel {
  padding: var(--spacing-xl);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}

.purchase-panel-head {
  display: flex;
  align-items: center;
  gap: var(--spacing);
  margin-bottom: var(--spacing-xl);
}

.purchase-mark {
  width: 56px;
  height: 56px;
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  border-radius: var(--radius);
  background: var(--gradient-primary);
  box-shadow: var(--shadow-glow);
  font-size: 28px;
}

.purchase-panel-head h2 {
  margin: 0;
  color: var(--ink);
  font-size: clamp(24px, 3vw, 32px);
  line-height: 1.2;
  font-weight: 900;
}

.purchase-panel-head p {
  margin: var(--spacing-sm) 0 0;
  color: var(--ink-lighter);
  font-size: 15px;
}

.purchase-steps {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing);
}

.purchase-steps li {
  position: relative;
  min-height: 140px;
  padding: var(--spacing-lg) var(--spacing) var(--spacing) 60px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: all var(--transition-base);
}

.purchase-steps li::before {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

.purchase-steps li:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary-light);
}

.purchase-steps li:hover::before {
  transform: scaleX(1);
}

.purchase-step-action {
  position: absolute;
  inset: 0;
  display: block;
  padding: var(--spacing-lg) var(--spacing) var(--spacing) 60px;
  color: inherit;
  text-decoration: none;
}

.purchase-step-action:hover {
  text-decoration: none;
}

.purchase-step-action:hover .purchase-step-link {
  background: rgba(6, 182, 212, 0.15);
  color: var(--accent);
  border-color: var(--accent);
}

.purchase-steps .step-no {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  position: absolute;
  left: var(--spacing);
  top: var(--spacing-lg);
  border-radius: 50%;
  background: var(--gradient-primary);
  color: white;
  font-size: 16px;
  font-weight: 900;
  box-shadow: var(--shadow-glow);
}

.purchase-steps strong {
  display: block;
  color: var(--ink);
  font-size: 15px;
  font-weight: 800;
  margin-bottom: var(--spacing-sm);
}

.purchase-step-link {
  display: inline-block;
  margin-top: var(--spacing-sm);
  padding: 3px 8px;
  border-radius: 6px;
  background: rgba(6, 182, 212, 0.08);
  border: 1px solid rgba(6, 182, 212, 0.2);
  color: var(--accent);
  font-size: 11px;
  font-weight: 700;
  transition: all var(--transition-fast);
}

.purchase-steps p {
  margin: var(--spacing-sm) 0 0;
  color: var(--ink-light);
  font-size: 13px;
  line-height: 1.5;
}

.purchase-note {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing);
  margin-top: var(--spacing-lg);
  padding: var(--spacing);
  border-radius: var(--radius);
  border: 1px solid rgba(16, 185, 129, 0.2);
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.05), transparent);
}

.purchase-note strong {
  display: block;
  color: var(--success);
  font-size: 18px;
  font-weight: 900;
}

.purchase-note p {
  margin: 0;
  color: var(--ink-lighter);
  font-size: 13px;
}

/* ============================================================
 * Reveal 动画
 * ============================================================ */

.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================================
 * 图片网格
 * ============================================================ */

.image-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing);
  margin: var(--spacing) 0;
}

.image-grid.single {
  grid-template-columns: 1fr;
  max-width: 700px;
}

.image-grid figure {
  margin: 0;
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
}

.image-grid figure:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.image-grid img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  transition: transform var(--transition-slow);
  cursor: zoom-in;
}

.image-grid figure:hover img {
  transform: scale(1.05);
}

.image-grid figcaption {
  padding: 12px;
  font-size: 13px;
  color: var(--ink-lighter);
  text-align: center;
  background: var(--bg-alt);
}

/* ============================================================
 * 元信息卡
 * ============================================================ */

.doc-meta {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--spacing);
  margin-top: var(--spacing-lg);
}

.doc-meta > div {
  padding: var(--spacing);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: all var(--transition-base);
}

.doc-meta > div:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary-light);
}

.doc-meta dt {
  color: var(--ink-lighter);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  margin-bottom: var(--spacing-xs);
}

.doc-meta dd {
  margin: 0;
  color: var(--ink);
  font-size: 14px;
  font-weight: 700;
  overflow-wrap: anywhere;
}

/* ============================================================
 * Callout 提示框
 * ============================================================ */

.callout {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: var(--spacing) var(--spacing-lg);
  border-radius: var(--radius);
  margin: var(--spacing) 0;
  border-left: 4px solid;
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}

.callout-ico {
  font-size: 24px;
  flex: 0 0 auto;
  line-height: 1;
}

.callout strong {
  display: block;
  margin-bottom: var(--spacing-xs);
  color: var(--ink);
  font-size: 14px;
  font-weight: 700;
}

.callout p {
  margin: 0;
  color: var(--ink-light);
  font-size: 14px;
  line-height: 1.6;
}

.callout-info {
  border-color: var(--info);
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.05), transparent);
}

.callout-info .callout-ico {
  color: var(--info);
}

.callout-tip {
  border-color: var(--success);
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.05), transparent);
}

.callout-tip .callout-ico {
  color: var(--success);
}

.callout-warn {
  border-color: var(--warning);
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.05), transparent);
}

.callout-warn .callout-ico {
  color: var(--warning);
}

/* ============================================================
 * 步骤列表
 * ============================================================ */

.step-list {
  list-style: none;
  counter-reset: step;
  padding: 0;
  margin: var(--spacing) 0;
  display: grid;
  gap: var(--spacing-sm);
}

.step-list li {
  position: relative;
  padding: var(--spacing) var(--spacing) var(--spacing) 56px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--ink-light);
  counter-increment: step;
  transition: all var(--transition-fast);
  font-size: 14px;
}

.step-list li:hover {
  transform: translateX(6px);
  border-color: var(--primary-light);
  box-shadow: var(--shadow-sm);
}

.step-list li::before {
  content: counter(step);
  position: absolute;
  left: var(--spacing);
  top: 50%;
  transform: translateY(-50%);
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  background: var(--gradient-primary);
  color: white;
  font-weight: 900;
  font-size: 14px;
  border-radius: 50%;
  box-shadow: var(--shadow-sm);
}

.step-list li b {
  color: var(--ink);
  font-weight: 700;
}

.step-list li kbd,
.doc-section kbd {
  display: inline-block;
  padding: 3px 8px;
  border-radius: 4px;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  font-size: 12px;
  font-family: inherit;
  font-weight: 600;
  color: var(--ink);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

/* ============================================================
 * 下载面板
 * ============================================================ */

.download-panel {
  margin: var(--spacing) 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.os-tabs {
  display: flex;
  gap: 0;
  background: var(--bg-alt);
  border-bottom: 1px solid var(--border);
}

.os-tab {
  flex: 1;
  padding: 12px var(--spacing);
  border: none;
  background: transparent;
  color: var(--ink-lighter);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  border-bottom: 2px solid transparent;
  position: relative;
}

.os-tab::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--gradient-primary);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.os-tab:hover {
  color: var(--ink);
  background: rgba(139, 92, 246, 0.05);
}

.os-tab.active {
  color: var(--primary-dark);
  border-bottom-color: var(--primary);
  background: var(--surface);
  font-weight: 700;
}

.os-panel {
  display: none;
  padding: var(--spacing-lg);
  animation: panel-fade-in var(--transition-base) ease;
}

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

.os-panel h3 {
  margin: 0 0 var(--spacing);
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
}

.os-panel h3::before {
  display: none;
}

@keyframes panel-fade-in {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============================================================
 * 下载卡片
 * ============================================================ */

.dl-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--spacing);
}

.dl-card {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  padding: var(--spacing);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: all var(--transition-base);
  text-decoration: none;
  color: var(--ink);
  position: relative;
  overflow: hidden;
}

.dl-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(
    circle at var(--mouse-x, 50%) var(--mouse-y, 50%),
    rgba(139, 92, 246, 0.1),
    transparent 50%
  );
  opacity: 0;
  transition: opacity var(--transition-base);
}

.dl-card:hover {
  transform: translateY(-6px);
  border-color: var(--primary-light);
  box-shadow: var(--shadow-lg);
  text-decoration: none;
}

.dl-card:hover::before {
  opacity: 1;
}

.dl-ic {
  font-size: 28px;
  position: relative;
  z-index: 1;
}

.dl-card strong {
  font-size: 14px;
  font-weight: 700;
  color: var(--ink);
  position: relative;
  z-index: 1;
}

.dl-card small {
  font-size: 12px;
  color: var(--ink-lighter);
  font-family: monospace;
  position: relative;
  z-index: 1;
}

.dl-card em {
  font-size: 12px;
  color: var(--ink-light);
  font-style: normal;
  position: relative;
  z-index: 1;
}

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

.url-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing);
  margin: var(--spacing) 0;
}

.url-card {
  display: flex;
  align-items: center;
  gap: var(--spacing);
  padding: var(--spacing-lg);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: all var(--transition-base);
}

.url-card:hover {
  transform: translateY(-4px);
  border-color: var(--primary-light);
  box-shadow: var(--shadow-md);
}

.url-card.primary {
  border-color: var(--primary-light);
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.05), rgba(236, 72, 153, 0.05));
  box-shadow: var(--shadow-sm);
}

.flag {
  font-size: 32px;
  flex: 0 0 auto;
}

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

.url-card-body strong {
  display: block;
  font-size: 14px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: var(--spacing-xs);
}

.url-card-body code {
  display: block;
  margin: var(--spacing-xs) 0;
  font-size: 13px;
  color: var(--primary-dark);
  background: rgba(139, 92, 246, 0.08);
  padding: 6px 10px;
  border-radius: 6px;
  word-break: break-all;
  border: 1px solid rgba(139, 92, 246, 0.1);
}

.url-card-body small {
  display: block;
  font-size: 12px;
  color: var(--ink-lighter);
  line-height: 1.5;
}

/* ============================================================
 * 插件卡片
 * ============================================================ */

.plugin-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--spacing);
  margin: var(--spacing) 0;
}

.plugin-card {
  padding: var(--spacing-lg);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: all var(--transition-base);
  box-shadow: var(--shadow-sm);
}

.plugin-card:hover {
  transform: translateY(-4px);
  border-color: var(--primary-light);
  box-shadow: var(--shadow-md);
}

.pl-ic {
  font-size: 32px;
  display: block;
  margin-bottom: var(--spacing);
}

.plugin-card strong {
  display: block;
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: var(--spacing-xs);
}

.plugin-card p {
  margin: 0 0 var(--spacing);
  font-size: 13px;
  color: var(--ink-lighter);
  line-height: 1.6;
}

.pl-btns {
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

/* ============================================================
 * 代码块
 * ============================================================ */

.code-block {
  position: relative;
  margin: var(--spacing) 0;
  background: #1e293b;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.code-block pre {
  margin: 0;
  padding: var(--spacing-lg);
  overflow-x: auto;
  font-size: 13px;
  line-height: 1.7;
  color: #e2e8f0;
}

.code-block .copy-btn {
  position: absolute;
  top: 12px;
  right: 12px;
  padding: 6px 12px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 6px;
  color: white;
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  z-index: 1;
  backdrop-filter: blur(10px);
}

.code-block .copy-btn:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
}

/* ============================================================
 * Q&A 折叠面板
 * ============================================================ */

.qa {
  margin: var(--spacing-sm) 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: all var(--transition-base);
  background: var(--surface);
}

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

.qa summary {
  padding: var(--spacing) var(--spacing-lg);
  cursor: pointer;
  font-weight: 600;
  color: var(--ink);
  font-size: 14px;
  transition: background var(--transition-fast);
  list-style: none;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.qa summary::-webkit-details-marker {
  display: none;
}

.qa summary::before {
  content: "▸";
  color: var(--primary);
  font-size: 14px;
  transition: transform var(--transition-fast);
}

.qa[open] summary::before {
  transform: rotate(90deg);
}

.qa summary:hover {
  background: var(--bg-alt);
}

.qa p {
  padding: 0 var(--spacing-lg) var(--spacing-lg);
  margin: 0;
  color: var(--ink-light);
  font-size: 14px;
  line-height: 1.7;
}

/* ============================================================
 * 列表样式
 * ============================================================ */

.doc-list {
  padding-left: 24px;
  margin: var(--spacing-sm) 0;
}

.doc-list li {
  margin: var(--spacing-xs) 0;
  color: var(--ink-light);
  line-height: 1.7;
}

.doc-list a {
  color: var(--primary);
  transition: color var(--transition-fast);
  font-weight: 600;
}

.doc-list a:hover {
  color: var(--primary-dark);
  text-decoration: underline;
}

/* ============================================================
 * Footer
 * ============================================================ */

.page-foot {
  margin-top: var(--spacing-2xl);
  padding: var(--spacing-xl) 0;
  text-align: center;
  font-size: 13px;
  color: var(--ink-lighter);
  border-top: 1px solid var(--border);
}

.page-foot p {
  margin: var(--spacing-xs) 0;
}

.page-foot .heart {
  color: var(--secondary);
  display: inline-block;
  animation: heartbeat 1.5s ease-in-out infinite;
}

@keyframes heartbeat {
  0%, 100% { transform: scale(1); }
  10%, 30% { transform: scale(1.1); }
  20%, 40% { transform: scale(1); }
}

/* ============================================================
 * 搜索浮层
 * ============================================================ */

.search-modal {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(8px);
  display: none;
  align-items: flex-start;
  justify-content: center;
  padding-top: 15vh;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: all var(--transition-base);
}

.search-modal.active {
  display: flex !important;
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.search-box {
  width: 90%;
  max-width: 600px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-2xl);
  overflow: hidden;
  animation: modal-slide-up var(--transition-base) ease;
}

@keyframes modal-slide-up {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.search-box input {
  width: 100%;
  padding: var(--spacing-lg) var(--spacing-xl);
  border: none;
  outline: none;
  background: transparent;
  font-size: 16px;
  color: var(--ink);
  font-family: inherit;
}

.search-box input::placeholder {
  color: var(--ink-lighter);
}

.search-results {
  max-height: 400px;
  overflow-y: auto;
  border-top: 1px solid var(--border);
}

.search-results .hit {
  display: block;
  padding: var(--spacing) var(--spacing-xl);
  color: var(--ink-light);
  font-size: 14px;
  transition: background var(--transition-fast);
  text-decoration: none;
}

.search-results .hit:hover {
  background: var(--bg-alt);
}

.search-results .hit strong {
  display: block;
  color: var(--ink);
  font-size: 14px;
  margin-bottom: var(--spacing-xs);
}

.search-results .hit span {
  font-size: 13px;
  color: var(--ink-lighter);
}

.search-results mark {
  background: rgba(139, 92, 246, 0.2);
  color: var(--primary-dark);
  border-radius: 2px;
  padding: 0 2px;
}

.search-results .empty {
  padding: var(--spacing-xl);
  text-align: center;
  color: var(--ink-lighter);
  font-size: 14px;
}

/* ============================================================
 * 图片灯箱
 * ============================================================ */

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 300;
  background: rgba(0, 0, 0, 0.9);
  display: none;
  align-items: center;
  justify-content: center;
  cursor: zoom-out;
  pointer-events: none;
  backdrop-filter: blur(10px);
}

.lightbox.active {
  display: flex !important;
  pointer-events: auto;
}

.lightbox img {
  max-width: 90%;
  max-height: 90%;
  border-radius: var(--radius);
  box-shadow: var(--shadow-2xl);
  animation: lightbox-zoom var(--transition-base) ease;
}

@keyframes lightbox-zoom {
  from {
    opacity: 0;
    transform: scale(0.8);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

/* ============================================================
 * Toast 提示
 * ============================================================ */

.toast {
  position: fixed;
  bottom: var(--spacing-xl);
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  padding: 12px 24px;
  background: var(--ink);
  color: white;
  border-radius: 99px;
  font-size: 14px;
  font-weight: 600;
  opacity: 0;
  transition: all var(--transition-base);
  z-index: 400;
  pointer-events: none;
  box-shadow: var(--shadow-2xl);
}

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

/* ============================================================
 * 右侧目录
 * ============================================================ */

.right-toc {
  position: sticky;
  top: 90px;
  align-self: start;
  max-height: calc(100vh - 100px);
  overflow-y: auto;
  padding: var(--spacing-lg) 0 var(--spacing-lg) var(--spacing);
  font-size: 13px;
}

.right-toc h4 {
  margin: 0 0 var(--spacing);
  font-size: 11px;
  font-weight: 700;
  color: var(--ink-lighter);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.right-toc ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.right-toc li {
  margin: var(--spacing-xs) 0;
}

.right-toc a {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: 6px var(--spacing-sm);
  border-radius: 6px;
  color: var(--ink-lighter);
  font-size: 12px;
  transition: all var(--transition-fast);
  text-decoration: none;
  border-left: 2px solid transparent;
}

.right-toc a:hover {
  background: var(--bg-alt);
  color: var(--ink);
  text-decoration: none;
  border-left-color: var(--primary-light);
}

.right-toc a.active {
  background: var(--bg-alt);
  color: var(--primary);
  font-weight: 600;
  border-left-color: var(--primary);
}

.rtoc-emoji {
  font-size: 12px;
}

/* ============================================================
 * 滚动到顶部按钮
 * ============================================================ */

.to-top {
  position: fixed;
  bottom: var(--spacing-xl);
  right: var(--spacing-xl);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--gradient-primary);
  border: none;
  color: white;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  opacity: 0;
  transform: translateY(100px) scale(0.8);
  transition: all var(--transition-base);
  z-index: 100;
}

.to-top.visible {
  opacity: 1;
  transform: translateY(0) scale(1);
}

.to-top:hover {
  transform: translateY(-4px) scale(1.05);
  box-shadow: var(--shadow-xl), 0 0 40px rgba(139, 92, 246, 0.6);
}

.to-top:active {
  transform: translateY(0) scale(0.95);
}

.to-top svg {
  width: 20px;
  height: 20px;
}

/* ============================================================
 * 响应式设计
 * ============================================================ */

@media (max-width: 1200px) {
  .right-toc {
    display: none;
  }

  .layout {
    grid-template-columns: var(--sidebar-w) minmax(0, 1fr);
  }
}

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

  .sidebar {
    position: fixed;
    left: -300px;
    top: 0;
    bottom: 0;
    width: 280px;
    z-index: 150;
    background: var(--surface);
    backdrop-filter: blur(20px);
    transition: left var(--transition-base);
    padding: var(--spacing-lg);
    border-right: 1px solid var(--border);
    box-shadow: var(--shadow-xl);
  }

  .sidebar.open {
    left: 0;
  }

  .sidebar-backdrop {
    position: fixed;
    inset: 0;
    z-index: 140;
    background: rgba(0, 0, 0, 0.5);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-base);
  }

  .sidebar.open + .sidebar-backdrop {
    opacity: 1;
    pointer-events: auto;
  }

  .nav-toggle {
    display: grid;
  }

  .topnav {
    display: none;
  }

  .hero {
    grid-template-columns: 1fr;
    padding: var(--spacing-xl) var(--spacing-lg);
  }

  .hero-art {
    display: none;
  }

  .page {
    padding: var(--spacing) var(--spacing-lg) var(--spacing-2xl);
  }

  .doc-section {
    padding: var(--spacing-lg);
  }

  .purchase-flow-section {
    padding: var(--spacing-lg);
  }

  .support-banner {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .support-icon {
    margin: 0 auto;
  }

  .support-banner .btn {
    justify-content: center;
  }

  .purchase-panel {
    padding: var(--spacing-lg);
  }

  .purchase-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .url-cards {
    grid-template-columns: 1fr;
  }

  .dl-grid {
    grid-template-columns: 1fr;
  }

  .plugin-cards {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  :root {
    --spacing-xl: 24px;
    --spacing-2xl: 32px;
  }

  .topbar-inner {
    padding: var(--spacing-sm) var(--spacing);
  }

  .brand-text small {
    display: none;
  }

  .hero h1 {
    font-size: 28px;
  }

  .section-head h2 {
    font-size: 24px;
  }

  .doc-meta {
    grid-template-columns: 1fr;
  }

  .purchase-steps {
    grid-template-columns: 1fr;
  }

  .purchase-note {
    flex-direction: column;
    align-items: flex-start;
  }

  .image-grid {
    grid-template-columns: 1fr;
  }

  .to-top {
    width: 44px;
    height: 44px;
    bottom: var(--spacing-lg);
    right: var(--spacing-lg);
  }

  .toast {
    left: var(--spacing);
    right: var(--spacing);
    transform: translateX(0) translateY(100px);
    border-radius: var(--radius);
  }

  .toast.show {
    transform: translateX(0) translateY(0);
  }
}

@media (max-width: 420px) {
  .hero-cta {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }

  .purchase-panel-head {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* ============================================================
 * 打印样式
 * ============================================================ */

@media print {
  .topbar,
  .sidebar,
  .right-toc,
  .to-top,
  .sakura-layer,
  .search-modal,
  .lightbox,
  .toast {
    display: none !important;
  }

  .layout {
    grid-template-columns: 1fr;
  }

  .page {
    padding: 0;
  }

  .doc-section {
    page-break-inside: avoid;
    box-shadow: none;
  }

  a {
    text-decoration: underline;
  }
}

/* ============================================================
 * 性能优化
 * ============================================================ */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* 强制GPU加速 */
.hero,
.mascot-img,
.float-card,
.btn,
.dl-card,
.url-card,
.plugin-card,
.toc-item,
.to-top {
  will-change: transform;
  transform: translateZ(0);
  backface-visibility: hidden;
}

/* 优化滚动性能 */
.sidebar,
.right-toc,
.search-results {
  will-change: scroll-position;
  -webkit-overflow-scrolling: touch;
}