/* ================================================================
   Markdown 渲染样式表（v3）
   覆盖 Parsedown 全部输出元素 + 升级动效/光晕/交互
================================================================ */

/* ====================== 全局主题变量 & 明暗模式 ====================== */
:root {
  /* —— 动效令牌 —— */
  --trans-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --trans-standard: all 0.22s cubic-bezier(0.4, 0, 0.2, 1);
  --trans-slow: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --trans-bounce: all 0.28s cubic-bezier(0.2, 0, 0.2, 1.4);
  --trans-elastic: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);

  /* —— 圆角系统 —— */
  --radius-xs: 4px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 20px;
  --radius-pill: 999px;

  /* —— 阴影层级 —— */
  --shadow-1: 0 1px 2px rgba(0, 0, 0, 0.05), 0 1px 3px rgba(0, 0, 0, 0.04);
  --shadow-2: 0 4px 12px rgba(0, 0, 0, 0.06), 0 2px 6px rgba(0, 0, 0, 0.04);
  --shadow-3: 0 8px 24px rgba(0, 0, 0, 0.10), 0 4px 10px rgba(0, 0, 0, 0.05);
  /* —— 光晕阴影 —— */
  --glow-primary: 0 0 20px color-mix(in srgb, var(--primary) 25%, transparent);
  --glow-primary-strong: 0 0 32px color-mix(in srgb, var(--primary) 40%, transparent);

  /* —— 间距系统（8pt 基准）—— */
  --space-xs: 0.25rem;   /* 4px  */
  --space-sm: 0.5rem;    /* 8px  */
  --space-md: 1rem;      /* 16px */
  --space-lg: 1.5rem;    /* 24px */
  --space-xl: 2.5rem;    /* 40px */

  /* —— 功能色（浅色模式默认）—— */
  --primary: #6750A4;
  --primary-light: #7965AF;
  --primary-dark: #5A4D9A;
  --primary-gradient: linear-gradient(135deg, #6750A4, #9C7BD1);

  /* 透明度色 */
  --primary-04: color-mix(in srgb, var(--primary) 4%, transparent);
  --primary-08: color-mix(in srgb, var(--primary) 8%, transparent);
  --primary-12: color-mix(in srgb, var(--primary) 12%, transparent);
  --primary-20: color-mix(in srgb, var(--primary) 20%, transparent);

  --primary-container: #F3EDF7;
  --on-primary-container: #1D1B20;
  --bg-page: #f6f7f9;
  --bg-surface: #ffffff;
  --surface-variant: #E7E0EC;
  --surface-variant-12: rgba(231, 224, 236, 0.45);
  --text-body: #3D3B40;
  --text-heading: #2c3e50;
  --text-muted: #6B6B6B;
  --text-high-contrast: #1D1B20;
  --border-normal: #E8DEF8;
  --border-subtle: #CAC4D0;

  /* —— 语义色 —— */
  --quote-bg: #ebf6ff;
  --quote-border: #90caf9;
  --warning-bg: #fef7e0;
  --warning-border: #f9ab00;
  --warning-text: #B07000;
  --success-bg: #e6f4ea;
  --success-border: #34a853;
  --success-text: #1E7E34;
  --danger-bg: #fdecea;
  --danger-border: #ea4335;
  --danger-text: #C62828;
  --info-bg: #e8f0fe;
  --info-border: #4285f4;
  --info-text: #1565C0;
  --tip-bg: #f3edf7;
  --tip-border: #6750A4;
  --tip-text: #5A4D9A;

  /* —— 行内强调色 —— */
  --mark-bg: #fff3a0;
  --mark-text: #5d4e00;
  --ins-color: #1b873f;
  --ins-bg: #e6f4ea;
  --del-color: #c62828;
  --kbd-bg: #f5f5f5;
  --kbd-border: #d0d0d0;
  --kbd-shadow: #bfbfbf;
  --spoiler-bg: #e0e0e0;
  --spoiler-text: transparent;
  --spoiler-reveal: #333;

  /* —— 图片 —— */
  --img-brightness: 1;
  --img-contrast: 1;

  /* —— 动画时长令牌 —— */
  --dur-in: 0.55s;
  --dur-stagger: 0.06s;

  /* —— 代码高亮色 —— */
  --code-bg: #1e1e2e;
  --code-header-bg: linear-gradient(135deg, #2d2b3d, #3d3b50);
  --code-text: #cdd6f4;
}

/* —— 深色模式：自动匹配系统 —— */
@media (prefers-color-scheme: dark) {
  :root:not(.theme-light) {
    --primary: #D0BCFF;
    --primary-light: #E8DFFF;
    --primary-dark: #B9A0F0;
    --primary-gradient: linear-gradient(135deg, #D0BCFF, #B9A0F0);
    --primary-04: color-mix(in srgb, var(--primary) 6%, transparent);
    --primary-08: color-mix(in srgb, var(--primary) 10%, transparent);
    --primary-12: color-mix(in srgb, var(--primary) 16%, transparent);
    --primary-20: color-mix(in srgb, var(--primary) 24%, transparent);
    --primary-container: #4A4458;
    --on-primary-container: #EADDFF;
    --bg-page: #141318;
    --bg-surface: #211F26;
    --surface-variant: #49454F;
    --surface-variant-12: rgba(73, 69, 79, 0.4);
    --text-body: #E6E1E5;
    --text-heading: #F4EFF4;
    --text-muted: #B4AEBA;
    --text-high-contrast: #FFFBFE;
    --border-normal: #49454F;
    --border-subtle: #38353C;
    --quote-bg: #1B2A36;
    --quote-border: #5C9CE6;
    --warning-bg: #3A3120;
    --warning-border: #F9AB00;
    --warning-text: #FFC107;
    --success-bg: #1A2E22;
    --success-border: #34A853;
    --success-text: #4CAF50;
    --danger-bg: #2E1A1A;
    --danger-border: #EA4335;
    --danger-text: #EF5350;
    --info-bg: #1A2332;
    --info-border: #5C9CE6;
    --info-text: #64B5F6;
    --tip-bg: #2A2435;
    --tip-border: #D0BCFF;
    --tip-text: #D0BCFF;
    --mark-bg: #7d6c00;
    --mark-text: #fff3a0;
    --ins-color: #66bb6a;
    --ins-bg: #1A2E22;
    --del-color: #ef5350;
    --kbd-bg: #38353C;
    --kbd-border: #49454F;
    --kbd-shadow: #1D1B20;
    --spoiler-bg: #49454F;
    --spoiler-reveal: #E6E1E5;
    --img-brightness: 0.9;
    --img-contrast: 1.06;
    --code-bg: #11111b;
    --code-header-bg: linear-gradient(135deg, #1e1e2e, #313244);
  }
}

/* —— 手动强制深色 —— */
.theme-dark {
  --primary: #D0BCFF;
  --primary-light: #E8DFFF;
  --primary-dark: #B9A0F0;
  --primary-gradient: linear-gradient(135deg, #D0BCFF, #B9A0F0);
  --primary-04: color-mix(in srgb, var(--primary) 6%, transparent);
  --primary-08: color-mix(in srgb, var(--primary) 10%, transparent);
  --primary-12: color-mix(in srgb, var(--primary) 16%, transparent);
  --primary-20: color-mix(in srgb, var(--primary) 24%, transparent);
  --primary-container: #4A4458;
  --on-primary-container: #EADDFF;
  --bg-page: #141318;
  --bg-surface: #211F26;
  --surface-variant: #49454F;
  --surface-variant-12: rgba(73, 69, 79, 0.4);
  --text-body: #E6E1E5;
  --text-heading: #F4EFF4;
  --text-muted: #B4AEBA;
  --text-high-contrast: #FFFBFE;
  --border-normal: #49454F;
  --border-subtle: #38353C;
  --quote-bg: #1B2A36;
  --quote-border: #5C9CE6;
  --warning-bg: #3A3120;
  --warning-border: #F9AB00;
  --warning-text: #FFC107;
  --success-bg: #1A2E22;
  --success-border: #34A853;
  --success-text: #4CAF50;
  --danger-bg: #2E1A1A;
  --danger-border: #EA4335;
  --danger-text: #EF5350;
  --info-bg: #1A2332;
  --info-border: #5C9CE6;
  --info-text: #64B5F6;
  --tip-bg: #2A2435;
  --tip-border: #D0BCFF;
  --tip-text: #D0BCFF;
  --mark-bg: #7d6c00;
  --mark-text: #fff3a0;
  --ins-color: #66bb6a;
  --ins-bg: #1A2E22;
  --del-color: #ef5350;
  --kbd-bg: #38353C;
  --kbd-border: #49454F;
  --kbd-shadow: #1D1B20;
  --spoiler-bg: #49454F;
  --spoiler-reveal: #E6E1E5;
  --img-brightness: 0.9;
  --img-contrast: 1.06;
  --code-bg: #11111b;
  --code-header-bg: linear-gradient(135deg, #1e1e2e, #313244);
}

/* ====================== 动画关键帧 ====================== */
@keyframes pageFadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

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

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeLeft {
  from { opacity: 0; transform: translateX(-12px); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.95); }
  to   { opacity: 1; transform: scale(1); }
}

@keyframes imgFadeIn {
  from { opacity: 0; transform: scale(0.96); filter: blur(8px); }
  to   { opacity: 1; transform: scale(1); filter: blur(0); }
}

@keyframes lineGrow {
  to { opacity: 0.8; transform: scaleX(1); }
}

@keyframes dividerFlow {
  0%   { background-position: 0% 50%; }
  50%  { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

@keyframes containerSlideUp {
  to { opacity: 1; transform: translateY(0); }
}

@keyframes glowPulse {
  0%, 100% { box-shadow: 0 0 5px color-mix(in srgb, var(--primary) 15%, transparent); }
  50%      { box-shadow: 0 0 20px color-mix(in srgb, var(--primary) 30%, transparent); }
}

@keyframes shimmer {
  0%   { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

@keyframes toastIn {
  from { opacity: 0; transform: translateY(-10px) scale(0.95); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes toastOut {
  from { opacity: 1; transform: translateY(0) scale(1); }
  to   { opacity: 0; transform: translateY(-10px) scale(0.95); }
}

@keyframes detailsReveal {
  from { opacity: 0; transform: translateY(-8px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes checkboxCheck {
  from { transform: scale(0); }
  to   { transform: scale(1); }
}

@keyframes listItemSlide {
  from { opacity: 0; transform: translateX(-10px); }
  to   { opacity: 1; transform: translateX(0); }
}

/* ====================== 全局初始化 ====================== */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen,
    Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
  background-color: var(--bg-page);
  background-image:
    radial-gradient(circle at 15% 20%, color-mix(in srgb, var(--primary) 4%, transparent) 0%, transparent 40%),
    radial-gradient(circle at 85% 80%, color-mix(in srgb, var(--primary) 3%, transparent) 0%, transparent 40%);
  color: var(--text-body);
  font-size: 15px;
  line-height: 1.7;
  font-weight: 400;
  min-height: 100vh;
  padding: var(--space-lg) 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  animation: pageFadeIn var(--dur-in) ease-out forwards;
  opacity: 0;
}

/* ====================== 主容器 ====================== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  background: var(--bg-surface);
  padding: var(--space-lg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-2);
  overflow: hidden;
  animation: containerSlideUp 0.7s ease-out 0.05s both;
  opacity: 0;
  transform: translateY(16px);
  position: relative;
}

/* 容器顶部装饰光带 */
.container::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--primary-gradient);
  background-size: 200% 100%;
  animation: dividerFlow 8s ease infinite;
}

/* ====================== 标题层级 ====================== */
h1, h2, h3, h4, h5, h6 {
  margin: 1.2em 0 0.6em;
  color: var(--text-heading);
  line-height: 1.3;
  font-family: system-ui, -apple-system, sans-serif;
  font-weight: 600;
  opacity: 0;
  animation: fadeUp var(--dur-in) ease-out forwards;
  position: relative;
  scroll-margin-top: 2rem;
}

h1 { animation-delay: 0.03s; }
h2 { animation-delay: 0.08s; }
h3 { animation-delay: 0.14s; }
h4, h5, h6 { animation-delay: 0.18s; }

h1 {
  font-size: 1.9rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  padding-bottom: 0.4em;
  border-bottom: 2px solid var(--border-normal);
}

h1::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 60px;
  height: 2px;
  background: var(--primary-gradient);
  border-radius: var(--radius-pill);
  animation: lineGrow 0.8s ease-out 0.3s both;
  transform-origin: left;
}

h2 {
  font-size: 1.55rem;
  letter-spacing: -0.005em;
  padding-left: 0.8em;
  border-left: 4px solid var(--primary);
  border-radius: 2px;
  transition: var(--trans-standard);
}

h2:hover {
  border-left-color: var(--primary-light);
  padding-left: 1em;
}

h3 {
  font-size: 1.28rem;
  transition: var(--trans-standard);
}

h3::before {
  content: '';
  display: inline-block;
  width: 8px;
  height: 8px;
  background: var(--primary);
  border-radius: 50%;
  margin-right: 0.5em;
  vertical-align: middle;
  opacity: 0.6;
  transition: var(--trans-standard);
}

h3:hover::before {
  opacity: 1;
  transform: scale(1.3);
  box-shadow: var(--glow-primary);
}

h4 { font-size: 1.1rem; }
h5 { font-size: 0.82rem; text-transform: uppercase; letter-spacing: 0.04em; color: var(--text-muted); }
h6 { font-size: 0.85rem; color: var(--text-muted); }

/* ====================== 段落、斜体、加粗 ====================== */
p {
  margin: 0.75em 0;
  word-wrap: break-word;
  overflow-wrap: break-word;
  opacity: 0;
  animation: fadeIn var(--dur-in) ease-out 0.1s forwards;
}

em, i {
  font-style: italic;
  font-weight: inherit;
  color: var(--primary-dark);
}

strong, b {
  font-weight: 700;
  position: relative;
  display: inline-block;
  padding: 0 0.15em;
  color: var(--text-high-contrast);
  background: linear-gradient(180deg, transparent 60%, color-mix(in srgb, var(--primary) 12%, transparent) 60%);
  border-radius: 2px;
  transition: var(--trans-standard);
}

strong em, em strong, strong i, i strong,
b em, em b, b i, i b {
  font-weight: 700;
  font-style: italic;
  padding: 0 0.15em;
}

li strong, li b { font-weight: 600; }

details > :not(summary) strong {
  font-weight: 650;
  font-size: 1.05em;
}

/* ====================== 行内强调元素 ====================== */

/* —— mark 高亮 ==text== —— */
mark {
  background: linear-gradient(120deg, var(--mark-bg) 0%, color-mix(in srgb, var(--mark-bg) 70%, #fff) 100%);
  color: var(--mark-text);
  padding: 0.1em 0.35em;
  border-radius: var(--radius-xs);
  font-weight: 500;
  box-shadow: 0 1px 3px color-mix(in srgb, var(--mark-bg) 40%, transparent);
}

/* —— del 删除线 ~~text~~ —— */
del, s {
  color: var(--del-color);
  text-decoration: line-through;
  text-decoration-thickness: 2px;
  opacity: 0.75;
  transition: var(--trans-standard);
}

del:hover, s:hover {
  opacity: 1;
  text-decoration-thickness: 3px;
}

/* —— ins 插入文本 ++text++ —— */
ins {
  color: var(--ins-color);
  text-decoration: none;
  background: var(--ins-bg);
  padding: 0.1em 0.35em;
  border-radius: var(--radius-xs);
  font-weight: 500;
  border-bottom: 2px solid var(--ins-color);
  transition: var(--trans-standard);
}

ins:hover {
  background: color-mix(in srgb, var(--ins-color) 15%, transparent);
  box-shadow: 0 2px 8px color-mix(in srgb, var(--ins-color) 25%, transparent);
}

/* —— sub / sup 上下标 —— */
sub, sup {
  font-size: 0.72em;
  line-height: 0;
  position: relative;
  vertical-align: baseline;
  font-weight: 600;
  color: var(--primary-dark);
}

sup { top: -0.5em; }
sub { bottom: -0.25em; }

/* —— kbd 键盘键 —— */
kbd {
  display: inline-block;
  font-family: 'JetBrains Mono', 'Roboto Mono', 'Consolas', monospace;
  font-size: 0.8em;
  line-height: 1;
  padding: 0.25em 0.5em;
  background: var(--kbd-bg);
  color: var(--text-high-contrast);
  border: 1px solid var(--kbd-border);
  border-bottom-width: 2px;
  border-radius: var(--radius-sm);
  box-shadow: 0 2px 0 var(--kbd-shadow), inset 0 1px 0 rgba(255, 255, 255, 0.3);
  vertical-align: middle;
  margin: 0 2px;
  white-space: nowrap;
  transition: var(--trans-fast);
}

kbd:active {
  transform: translateY(2px);
  box-shadow: 0 0 0 var(--kbd-shadow), inset 0 1px 0 rgba(255, 255, 255, 0.3);
  border-bottom-width: 1px;
}

/* —— abbr 缩写 —— */
abbr[title] {
  cursor: help;
  text-decoration: underline dotted var(--primary);
  text-decoration-thickness: 1.5px;
  text-underline-offset: 3px;
  transition: var(--trans-fast);
  border-bottom: none;
}

abbr[title]:hover {
  color: var(--primary);
  text-decoration-color: var(--primary);
  background: var(--primary-04);
  border-radius: var(--radius-xs);
  padding: 0 2px;
}

/* —— spoiler 剧透 ||text|| —— */
.spoiler {
  background: var(--spoiler-bg);
  color: var(--spoiler-text);
  border-radius: var(--radius-xs);
  padding: 0.1em 0.3em;
  cursor: pointer;
  transition: var(--trans-standard);
  user-select: none;
  position: relative;
}

.spoiler::selection {
  background: var(--spoiler-bg);
  color: var(--spoiler-text);
}

.spoiler:hover,
.spoiler.revealed {
  background: transparent;
  color: var(--spoiler-reveal);
  text-decoration: none;
}

.spoiler:hover::before,
.spoiler.revealed::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-xs);
  background: color-mix(in srgb, var(--primary) 8%, transparent);
  pointer-events: none;
}

/* ====================== 超链接 ====================== */
a {
  color: var(--primary);
  text-decoration: none;
  transition: var(--trans-standard);
  position: relative;
  display: inline-block;
  padding: 0 2px;
  margin: 0 -2px;
  font-weight: 500;
  border-radius: var(--radius-xs);
}

a:hover {
  background: var(--primary-08);
  text-decoration: underline;
  text-decoration-color: var(--primary);
  text-underline-offset: 4px;
  text-decoration-thickness: 2px;
  text-shadow: 0 0 12px color-mix(in srgb, var(--primary) 30%, transparent);
}

a:active {
  background: var(--primary-12);
  text-decoration-thickness: 3px;
}

a:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px var(--primary-20);
}

a::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--primary-gradient);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  border-radius: var(--radius-pill);
}

a:hover::after {
  transform: scaleX(1);
  box-shadow: 0 0 8px color-mix(in srgb, var(--primary) 50%, transparent);
}

/* ====================== 列表 & 任务列表 ====================== */
ul, ol {
  margin: var(--space-md) 0;
  padding-left: 1.8rem;
  opacity: 0;
  animation: fadeUp var(--dur-in) ease-out 0.12s forwards;
}

li {
  margin: 0.35rem 0;
  font-weight: 400;
}

li ul, li ol {
  margin: 0.3rem 0 0;
  animation: none;
  opacity: 1;
  transform: none;
}

/* —— 任务列表 —— */
li:has(> input[type="checkbox"]) {
  list-style: none;
  margin-left: -1.2rem;
  padding-left: 0;
}

input[type="checkbox"][disabled] {
  appearance: none;
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  border: 2px solid var(--border-subtle);
  border-radius: var(--radius-xs);
  vertical-align: middle;
  margin-right: 0.5em;
  position: relative;
  cursor: default;
  background: var(--bg-surface);
  transition: var(--trans-standard);
  flex-shrink: 0;
}

input[type="checkbox"][disabled]:hover {
  border-color: var(--primary);
}

input[type="checkbox"][disabled][checked] {
  background: var(--primary-gradient);
  border-color: var(--primary);
  box-shadow: 0 0 8px color-mix(in srgb, var(--primary) 30%, transparent);
}

input[type="checkbox"][disabled][checked]::after {
  content: '';
  position: absolute;
  left: 5px;
  top: 1px;
  width: 5px;
  height: 10px;
  border: solid white;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
  animation: checkboxCheck 0.2s ease-out;
}

/* 已完成的任务项文字变灰 + 删除线 */
li:has(> input[type="checkbox"][checked]) {
  opacity: 0.6;
}

li:has(> input[type="checkbox"][checked]) > :not(input) {
  text-decoration: line-through;
  text-decoration-thickness: 1.5px;
  color: var(--text-muted);
}

/* ====================== 引用块 & 告示 ====================== */
blockquote {
  border-left: 4px solid var(--quote-border);
  margin: 1.2rem 0;
  padding: 0.6rem 1.1rem;
  color: var(--text-body);
  background-color: var(--quote-bg);
  font-size: 0.95em;
  font-weight: 400;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  opacity: 0;
  animation: fadeLeft var(--dur-in) ease-out 0.1s forwards;
  position: relative;
  overflow: hidden;
}

/* 引用块左边框光带 */
blockquote::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: linear-gradient(180deg, var(--quote-border), var(--primary));
  opacity: 0;
  transition: var(--trans-slow);
}

blockquote:hover::before {
  opacity: 0.5;
}

blockquote p {
  animation: none;
  opacity: 1;
  transform: none;
  margin: 0.4em 0;
}

/* 嵌套引用 */
blockquote blockquote {
  margin: 0.5rem 0;
  border-left-color: var(--primary-light);
}

/* —— 告示 Admonition —— */
.admonition {
  margin: 1.2rem 0;
  padding: 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  border-left: 4px solid var(--tip-border);
  background: var(--tip-bg);
  opacity: 0;
  animation: fadeLeft var(--dur-in) ease-out 0.1s forwards;
  box-shadow: var(--shadow-1);
  transition: var(--trans-standard);
}

.admonition:hover {
  box-shadow: var(--shadow-2);
  transform: translateX(2px);
}

.admonition-title {
  font-weight: 700;
  font-size: 0.9rem;
  padding: 0.6rem 1rem 0.5rem;
  margin: 0;
  color: var(--tip-text);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  background: color-mix(in srgb, var(--tip-border) 10%, transparent);
}

/* 告示图标 */
.admonition-title::before {
  font-family: 'Material Icons';
  font-size: 1.2rem;
  font-weight: normal;
  text-transform: none;
  letter-spacing: 0;
}

.admonition > :not(.admonition-title) {
  padding: 0.5rem 1rem 0.8rem;
  margin: 0;
}

.admonition > :not(.admonition-title):last-child {
  padding-bottom: 0.8rem;
}

.admonition p {
  animation: none;
  opacity: 1;
  margin: 0.3em 0;
}

/* —— 告示类型变体 —— */
.admonition-note,
.admonition-info {
  border-left-color: var(--info-border);
  background: var(--info-bg);
}
.admonition-note .admonition-title,
.admonition-info .admonition-title {
  color: var(--info-text);
  background: color-mix(in srgb, var(--info-border) 12%, transparent);
}
.admonition-note .admonition-title::before { content: 'info'; }
.admonition-info .admonition-title::before { content: 'lightbulb'; }

.admonition-tip {
  border-left-color: var(--tip-border);
  background: var(--tip-bg);
}
.admonition-tip .admonition-title {
  color: var(--tip-text);
  background: color-mix(in srgb, var(--tip-border) 12%, transparent);
}
.admonition-tip .admonition-title::before { content: 'tips_and_updates'; }

.admonition-warning,
.admonition-caution,
.admonition-attention {
  border-left-color: var(--warning-border);
  background: var(--warning-bg);
}
.admonition-warning .admonition-title,
.admonition-caution .admonition-title,
.admonition-attention .admonition-title {
  color: var(--warning-text);
  background: color-mix(in srgb, var(--warning-border) 12%, transparent);
}
.admonition-warning .admonition-title::before { content: 'warning'; }
.admonition-caution .admonition-title::before { content: 'report_problem'; }
.admonition-attention .admonition-title::before { content: 'priority_high'; }

.admonition-danger,
.admonition-error {
  border-left-color: var(--danger-border);
  background: var(--danger-bg);
}
.admonition-danger .admonition-title,
.admonition-error .admonition-title {
  color: var(--danger-text);
  background: color-mix(in srgb, var(--danger-border) 12%, transparent);
}
.admonition-danger .admonition-title::before { content: 'dangerous'; }
.admonition-error .admonition-title::before { content: 'error'; }

.admonition-success {
  border-left-color: var(--success-border);
  background: var(--success-bg);
}
.admonition-success .admonition-title {
  color: var(--success-text);
  background: color-mix(in srgb, var(--success-border) 12%, transparent);
}
.admonition-success .admonition-title::before { content: 'check_circle'; }

.admonition-quote {
  border-left-color: var(--quote-border);
  background: var(--quote-bg);
}
.admonition-quote .admonition-title {
  color: var(--info-text);
  background: color-mix(in srgb, var(--quote-border) 12%, transparent);
}
.admonition-quote .admonition-title::before { content: 'format_quote'; }

.admonition-faq {
  border-left-color: var(--primary);
  background: var(--primary-04);
}
.admonition-faq .admonition-title {
  color: var(--primary-dark);
  background: var(--primary-08);
}
.admonition-faq .admonition-title::before { content: 'help_outline'; }

/* —— 未识别类型的告示回退 —— */
.admonition:not([class*="admonition-"]):not(.admonition) .admonition-title::before,
.admonition .admonition-title::before {
  /* 默认已有图标，这里防止重复 */
}

/* ====================== 表格 ====================== */
.table-container {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: var(--space-lg) 0;
  border-radius: var(--radius-lg);
  position: relative;
  background: var(--primary-container);
  border: 1px solid var(--border-normal);
  opacity: 0;
  animation: scaleIn var(--dur-in) ease-out 0.1s forwards;
  box-shadow: var(--shadow-1);
}

table {
  width: 100%;
  min-width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  background: var(--bg-surface);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

th, td {
  padding: 13px 16px;
  text-align: left;
  border-bottom: 1px solid var(--surface-variant);
  transition: background-color 0.2s ease, transform 0.2s ease;
}

th {
  background-color: var(--primary-container);
  font-weight: 600;
  color: var(--on-primary-container);
  white-space: nowrap;
  position: sticky;
  top: 0;
  z-index: 1;
  border-bottom: 2px solid var(--primary-20);
}

tr:hover td {
  background-color: var(--primary-04);
  transform: scale(1.005);
  transform-origin: center;
}

tr:nth-child(even) { background-color: var(--surface-variant-12); }
tr:last-child td { border-bottom: none; }

tr:first-child th:first-child { border-top-left-radius: var(--radius-lg); }
tr:first-child th:last-child  { border-top-right-radius: var(--radius-lg); }
tr:last-child td:first-child  { border-bottom-left-radius: var(--radius-lg); }
tr:last-child td:last-child   { border-bottom-right-radius: var(--radius-lg); }

/* ====================== 代码块 ====================== */
.code-wrapper {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  padding-top: 42px;
  margin: var(--space-md) 0;
  opacity: 0;
  animation: fadeUp var(--dur-in) ease-out 0.12s forwards;
  box-shadow: var(--shadow-2);
  transition: var(--trans-standard);
}

.code-wrapper:hover {
  box-shadow: var(--shadow-3), 0 0 0 1px var(--primary-20);
}

/* 代码块顶部装饰条 */
.code-wrapper::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 42px;
  background: var(--code-header-bg);
  z-index: 0;
}

/* 红黄绿圆点 */
.code-wrapper::after {
  content: '';
  position: absolute;
  top: 14px;
  left: 16px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #ff5f56;
  box-shadow:
    20px 0 0 #ffbd2e,
    40px 0 0 #27c93f;
  z-index: 1;
}

pre {
  background-color: var(--code-bg);
  padding: var(--space-md);
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
  overflow-x: auto;
  line-height: 1.6;
  font-family: 'JetBrains Mono', 'Roboto Mono', 'Consolas', monospace;
  font-size: 0.875rem;
  border: 1px solid var(--border-normal);
  border-top: none;
  max-height: 420px;
  color: var(--code-text);
  position: relative;
  z-index: 0;
}

/* 代码块顶部渐变光 */
pre::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--primary-20), transparent);
}

code {
  font-family: 'JetBrains Mono', 'Roboto Mono', 'Consolas', monospace;
  font-size: 0.875em;
  padding: 0.15em 0.4em;
  border-radius: var(--radius-xs);
  line-height: 1.6;
  background-color: var(--primary-08);
  color: var(--primary-dark);
  transition: var(--trans-fast);
}

code:hover {
  background-color: var(--primary-12);
}

pre code {
  background-color: transparent;
  color: inherit;
  padding: 0;
}

pre code:hover {
  background-color: transparent;
}

/* ====================== 图片 & 图注 ====================== */
img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: var(--space-md) auto;
  border-radius: var(--radius-md);
  filter: brightness(var(--img-brightness)) contrast(var(--img-contrast));
  transition: var(--trans-slow);
  opacity: 0;
  animation: imgFadeIn 0.7s ease-out forwards;
  box-shadow: var(--shadow-1);
}

img:hover {
  transform: scale(1.02);
  box-shadow: var(--shadow-3);
}

p img, li img, td img {
  max-width: 90%;
  max-height: 300px;
}

:not(p):not(li):not(td) > img {
  max-width: 80%;
  max-height: 500px;
}

a img { max-width: 200px; }
a:hover img { transform: scale(1.05); box-shadow: var(--shadow-3), var(--glow-primary); }

/* —— figure / figcaption —— */
figure {
  margin: var(--space-lg) 0;
  text-align: center;
  opacity: 0;
  animation: fadeUp var(--dur-in) ease-out 0.12s forwards;
}

figure img {
  margin: 0 auto;
}

figcaption {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-style: italic;
  margin-top: var(--space-sm);
  padding: var(--space-xs) var(--space-md);
  border-top: 1px solid var(--border-normal);
  display: inline-block;
}

/* ====================== 折叠面板 details ====================== */
details {
  margin: var(--space-md) 0;
  border: 1px solid var(--border-normal);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
  opacity: 0;
  animation: fadeUp var(--dur-in) ease-out 0.1s forwards;
  interpolate-size: allow-keywords;
  background: var(--bg-surface);
}

details[open] {
  border-color: var(--primary-20);
  box-shadow: var(--shadow-2), 0 0 0 1px var(--primary-08);
}

summary {
  cursor: pointer;
  padding: 0.9rem 3rem 0.9rem 1.4rem;
  font-weight: 600;
  color: var(--text-high-contrast);
  list-style: none;
  position: relative;
  background-color: var(--primary-04);
  transition: background-color 0.25s ease, color 0.25s ease;
  min-height: 20px;
  display: flex;
  align-items: center;
  user-select: none;
}

summary:hover {
  background-color: var(--primary-08);
}

details[open] > summary {
  background: linear-gradient(135deg,
    var(--primary-08) 0%,
    var(--primary-12) 100%);
  color: var(--primary-dark);
  border-bottom: 1px solid var(--primary-20);
}

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

summary::after {
  content: 'expand_more';
  font-family: 'Material Icons';
  font-size: 1.4rem;
  position: absolute;
  right: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--primary);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1),
              color 0.25s ease;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
}

details[open] > summary::after {
  color: var(--primary-dark);
  transform: translateY(-50%) rotate(180deg);
}

/* —— 内容区 —— */
details > :not(summary) {
  padding: var(--space-md) var(--space-lg);
  background-color: var(--bg-surface);
}

details > :not(summary):first-child { padding-top: var(--space-md); }
details > :not(summary):last-child  { padding-bottom: var(--space-md); }

details[open] > :not(summary) {
  animation: detailsReveal 0.4s ease-out both;
}

details[open] > :not(summary):nth-child(2) { animation-delay: 0.02s; }
details[open] > :not(summary):nth-child(3) { animation-delay: 0.06s; }
details[open] > :not(summary):nth-child(4) { animation-delay: 0.10s; }
details[open] > :not(summary):nth-child(5) { animation-delay: 0.14s; }
details[open] > :not(summary):nth-child(n+6) { animation-delay: 0.18s; }

@supports (interpolate-size: allow-keywords) {
  details::details-content {
    transition: height 0.35s cubic-bezier(0.4, 0, 0.2, 1),
                content-visibility 0.35s ease;
    overflow: hidden;
  }
}

/* 嵌套 details */
details details {
  margin: var(--space-sm) 0;
  border-color: var(--border-normal);
}

details details > :not(summary) {
  padding-left: var(--space-lg);
}

/* ====================== 分割线 ====================== */
hr {
  border: none;
  height: 2px;
  background: linear-gradient(90deg,
    transparent,
    var(--surface-variant) 20%,
    var(--surface-variant) 80%,
    transparent);
  margin: var(--space-lg) 0;
  border-radius: var(--radius-xs);
  opacity: 0;
  transform: scaleX(0.7);
  animation: lineGrow 0.8s ease-out forwards;
}

hr.primary {
  height: 3px;
  background: linear-gradient(90deg,
    transparent,
    var(--primary) 20%,
    var(--primary-light) 50%,
    var(--primary) 80%,
    transparent);
  background-size: 200% 100%;
  animation: lineGrow 0.8s ease-out forwards,
             dividerFlow 6s ease infinite 0.8s;
  margin: var(--space-xl) 0;
  border-radius: var(--radius-pill);
}

.card-divider {
  height: 1.5px;
  background: linear-gradient(to right,
    transparent 0%,
    var(--primary-20) 50%,
    transparent 100%);
  margin: 1.5rem calc(-1 * var(--space-lg));
  position: relative;
  opacity: 0;
  transform: scaleX(0.7);
  animation: lineGrow 0.8s ease-out forwards;
}

.card-divider::after {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 100%;
  background: var(--primary);
  opacity: 0.3;
  border-radius: var(--radius-pill);
}

.vertical-divider {
  width: 1.5px;
  height: 100%;
  background: linear-gradient(to bottom,
    transparent 0%,
    var(--surface-variant) 20%,
    var(--surface-variant) 80%,
    transparent 100%);
  margin: 0 var(--space-md);
}

/* ====================== 脚注 ====================== */

/* 脚注引用标记 [^id] → <sup><a> */
sup > a[href^="#fn-"] {
  font-size: 0.75em;
  font-weight: 700;
  color: var(--primary);
  background: var(--primary-08);
  padding: 0.1em 0.45em;
  border-radius: var(--radius-pill);
  text-decoration: none;
  line-height: 1;
  transition: var(--trans-standard);
  border: 1px solid var(--primary-12);
}

sup > a[href^="#fn-"]::after {
  display: none;
}

sup > a[href^="#fn-"]:hover {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
  box-shadow: var(--glow-primary);
  transform: translateY(-2px);
  text-shadow: none;
}

/* 脚注区 .footnotes */
.footnotes {
  margin-top: var(--space-xl);
  padding: var(--space-md) var(--space-lg);
  background: var(--primary-04);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-normal);
  opacity: 0;
  animation: fadeUp var(--dur-in) ease-out 0.15s forwards;
  position: relative;
}

.footnotes::before {
  content: 'Footnotes';
  display: block;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--primary);
  margin-bottom: var(--space-sm);
  padding-bottom: var(--space-xs);
  border-bottom: 1px solid var(--primary-12);
}

.footnotes ol {
  padding-left: 1.5rem;
  margin: 0;
  animation: none;
  opacity: 1;
  transform: none;
}

.footnotes li {
  font-size: 0.88em;
  color: var(--text-muted);
  margin: 0.5rem 0;
  padding: 0.3rem 0;
  line-height: 1.5;
}

.footnotes li:target {
  background: var(--primary-08);
  border-radius: var(--radius-xs);
  padding: 0.3rem 0.5rem;
  margin: 0.5rem -0.5rem;
  animation: glowPulse 1.5s ease;
}

/* 脚注返回链接 */
.footnotes a[href^="#fnref-"] {
  font-size: 0.8em;
  margin-left: 0.3em;
  color: var(--primary);
  text-decoration: none;
  opacity: 0.6;
  transition: var(--trans-standard);
}

.footnotes a[href^="#fnref-"]::after {
  display: none;
}

.footnotes a[href^="#fnref-"]:hover {
  opacity: 1;
  background: var(--primary-08);
  text-shadow: none;
}

/* ====================== 定义列表 ====================== */
dl {
  margin: var(--space-md) 0;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  background: var(--primary-04);
  opacity: 0;
  animation: fadeUp var(--dur-in) ease-out 0.12s forwards;
}

dt {
  font-weight: 700;
  color: var(--text-high-contrast);
  margin-top: var(--space-sm);
  padding-left: 0.5em;
  border-left: 3px solid var(--primary);
  transition: var(--trans-standard);
}

dt:first-child {
  margin-top: 0;
}

dt:hover {
  border-left-color: var(--primary-light);
  padding-left: 0.8em;
}

dd {
  margin: 0.3rem 0 0.5rem 1.5rem;
  padding-left: 0.5em;
  color: var(--text-body);
  position: relative;
}

dd::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--primary-20);
  transition: var(--trans-standard);
}

dd:hover::before {
  background: var(--primary);
  box-shadow: var(--glow-primary);
}

/* ====================== 数学公式 ====================== */

/* 行内公式 <span class="math inline">$...$</span> */
.math.inline,
.math {
  font-family: 'Cambria Math', 'STIX Two Math', 'Latin Modern Math', serif;
  font-style: italic;
  padding: 0.1em 0.3em;
  background: var(--primary-04);
  border-radius: var(--radius-xs);
  color: var(--text-high-contrast);
  font-size: 1.05em;
}

/* 块级公式 $$...$$ （Parsedown 输出为纯文本 $$ 包裹） */
pre + .math,
.math:not(.inline) {
  display: block;
  text-align: center;
  margin: var(--space-md) auto;
  padding: var(--space-md);
  font-size: 1.15em;
  background: var(--primary-04);
  border: 1px solid var(--border-normal);
  border-radius: var(--radius-md);
  overflow-x: auto;
  opacity: 0;
  animation: scaleIn var(--dur-in) ease-out 0.12s forwards;
}

/* ====================== 复制按钮 & 弹窗提示 ====================== */
.copy-btn {
  background: var(--primary);
  color: var(--bg-surface);
  border: none;
  position: absolute;
  right: 12px;
  top: 10px;
  padding: 7px 12px;
  border-radius: var(--radius-pill);
  cursor: pointer;
  font-size: 0.75rem;
  font-weight: 500;
  transition: var(--trans-standard);
  display: flex;
  align-items: center;
  gap: 4px;
  box-shadow: var(--shadow-1);
  z-index: 2;
}

.copy-btn:hover {
  background: var(--primary-light);
  box-shadow: var(--shadow-2), var(--glow-primary);
  transform: translateY(-1px);
}

.copy-btn:active {
  background: var(--primary-dark);
  transform: scale(0.96);
}

.copy-btn::before {
  content: 'content_copy';
  font-family: 'Material Icons';
  font-size: 15px;
}

.copy-alert {
  position: fixed;
  top: 24px;
  right: 24px;
  background: var(--primary-gradient);
  color: white;
  padding: 12px 24px;
  border-radius: var(--radius-pill);
  display: none;
  box-shadow: var(--shadow-3), 0 0 20px color-mix(in srgb, var(--primary) 40%, transparent);
  font-size: 0.875rem;
  font-weight: 500;
  z-index: 1000;
}

.copy-alert.show {
  display: block;
  animation: toastIn 0.3s ease forwards;
}

.copy-alert.hide {
  animation: toastOut 0.3s ease forwards;
}

/* ====================== 响应式适配 ====================== */
@media (max-width: 768px) {
  body { padding: var(--space-md) 0; }
  .container {
    padding: var(--space-md);
    margin: 0 10px;
    border-radius: var(--radius-md);
  }
  h1 { font-size: 1.7rem; }
  h2 { font-size: 1.4rem; }
  h3 { font-size: 1.2rem; }
  table {
    display: block;
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
  hr { margin: var(--space-lg) 0; }
  .card-divider { margin: 1.2rem calc(-1 * var(--space-md)); }
  .admonition { font-size: 0.92em; }
  .footnotes { padding: var(--space-sm) var(--space-md); }
}

@media (max-width: 480px) {
  .container { padding: var(--space-sm); }
  ul, ol { padding-left: 1.4rem; }
  th, td { padding: 10px 12px; font-size: 13px; }
  .copy-btn {
    padding: 6px 10px;
    font-size: 0.65rem;
    right: 8px;
    top: 8px;
  }
  hr.primary { margin: var(--space-xl) 0; }
  body { font-size: 14px; }
  kbd { font-size: 0.72em; }
}

/* ====================== 无障碍：尊重减少动效偏好 ====================== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  body, .container, h1, h2, h3, h4, h5, h6,
  p, ul, ol, blockquote, img, hr, details,
  .table-container, .code-wrapper, figure,
  .admonition, .footnotes, dl {
    opacity: 1 !important;
    transform: none !important;
  }
}

/* ====================== 选区与滚动条美化 ====================== */
::selection {
  background: var(--primary-20);
  color: var(--text-high-contrast);
}

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: var(--border-subtle);
  border-radius: var(--radius-pill);
  border: 2px solid var(--bg-page);
  transition: var(--trans-standard);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--primary-light);
  box-shadow: var(--glow-primary);
}

/* 代码块内滚动条 */
pre::-webkit-scrollbar { height: 6px; }
pre::-webkit-scrollbar-thumb {
  background: color-mix(in srgb, var(--primary) 30%, transparent);
  border-radius: var(--radius-pill);
  border: none;
}
pre::-webkit-scrollbar-thumb:hover {
  background: var(--primary);
}