/* ═══════════════════════════════════════════════════════════
 * Xiyin Acoustics · MkDocs Material 组件覆盖（v1.4）
 * 对齐 paper/doc/00-首页导航_v3.html 的视觉语言
 * ═══════════════════════════════════════════════════════════ */

/* ─── 顶部 2px 三色极光线（固定） ─────────────────────────── */
body::before {
  content: '';
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--gradient-topline);
  opacity: 0.85;
  z-index: 9999;
  pointer-events: none;
}

/* ─── Header ─────────────────────────────────────────────── */
.md-header {
  background: linear-gradient(180deg, var(--night-deep), var(--night-mid));
  box-shadow: 0 2px 16px -4px rgba(0,0,0,0.3);
}
.md-header__title {
  font-family: var(--font-serif-cn);
  font-weight: 600;
  letter-spacing: 0.06em;
  font-size: 18px;
}
/* ─── Header Logo（三色同心圆 + 珠光核心 · 统一自 07_web xisound-website）──
 * 官方 Logo 的三色 stroke（曦紫/玫瑰金/极光青）和中心 radial 珠光点需要保留原始 SVG 颜色，
 * 因此这里不再强制 fill 单色。仅保留圆形 SVG 轮廓的尺寸和可视性微调。
 * 源文件：docs/assets/images/xisound-logo.svg */
.md-header__button.md-logo { padding: 0.4rem; }
.md-header__button.md-logo img,
.md-header__button.md-logo svg { height: 1.5rem; width: 1.5rem; }

/* ─── Tabs ───────────────────────────────────────────────── */
.md-tabs {
  background: var(--night-mid);
  border-bottom: 1px solid rgba(212,165,116,0.2);
}
.md-tabs__link {
  font-family: var(--font-sans-mixed);
  font-weight: 500;
  letter-spacing: 0.05em;
  opacity: 0.85;
}
.md-tabs__link:hover,
.md-tabs__link--active {
  color: var(--yin-color-light) !important;
  opacity: 1;
}
.md-tabs__item--active > .md-tabs__link {
  border-bottom: 2px solid var(--yin-color);
}

/* ─── 搜索 ───────────────────────────────────────────────── */
.md-search__input { background: rgba(212,165,116,0.1); color: var(--pearl); }
.md-search__input::placeholder { color: var(--pearl-mute); }
.md-search-result__teaser mark {
  background: rgba(212,165,116,0.25);
  color: inherit; padding: 1px 3px; border-radius: 2px;
}

/* ═══════════════════════════════════════════════════════════ */
/*  ★ H1 章节头 · Domain 样式（仿 00-首页导航_v3）              */
/* ═══════════════════════════════════════════════════════════ */

.md-typeset h1 {
  /* 布局：左章节号 + 中标题 + 右补充 */
  display: grid;
  grid-template-columns: 80px 1fr auto;
  gap: 24px;
  align-items: center;
  margin: 40px 0 36px;
  padding: 22px 30px;
  background: linear-gradient(135deg, var(--night-deep), var(--night-mid));
  color: var(--pearl);
  border-radius: var(--radius-md);
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(212,165,116,0.2);
  font-family: var(--font-serif-cn);
  font-size: 24px;
  font-weight: 700;
  letter-spacing: 0.06em;
  line-height: 1.3;
  /* 清空之前的金属渐变 */
  background-clip: initial;
  -webkit-background-clip: initial;
  -webkit-text-fill-color: inherit;
}
.md-typeset h1::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, var(--xi-color), var(--yin-color), var(--sheng-color));
}
/* 隐藏 headerlink 的 § 符号（双保险，toc permalink 已关） */
.md-typeset h1 .headerlink,
.md-typeset h2 .headerlink,
.md-typeset h3 .headerlink,
.md-typeset h4 .headerlink,
.md-typeset h5 .headerlink,
.md-typeset h6 .headerlink {
  display: none !important;
}

/* ─── H2 静态样式（每个 ## 都渲染成深夜蓝大卡，复用 H1 Domain 卡结构）── */
.md-typeset h2 {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 20px;
  align-items: center;
  margin: 48px 0 24px;
  padding: 22px 30px;
  background: linear-gradient(135deg, var(--night-deep), var(--night-mid));
  color: var(--pearl);
  border-radius: var(--radius-md);
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(212,165,116,0.2);
  font-family: var(--font-serif-cn);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.06em;
  line-height: 1.3;
  background-clip: initial;
  -webkit-background-clip: initial;
  -webkit-text-fill-color: inherit;
}
.md-typeset h2::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--xi-color), var(--yin-color), var(--sheng-color));
}
[data-md-color-scheme="xiyin-dark"] .md-typeset h2 {
  color: var(--pearl);
}

/* ─── H3 静态样式（作为标题时 · 顶三色线 + 左金竖条 + 金色晕染，复用原 H2 样式）── */
.md-typeset h3 {
  font-family: var(--font-serif-cn);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--night-deep);
  background: linear-gradient(90deg, rgba(212,165,116,0.08), transparent);
  padding: 12px 20px 12px 22px;
  margin: 32px 0 16px;
  border-left: 3px solid var(--yin-color);
  position: relative;
  border-top: none;
  transition: all var(--dur-normal);
}
.md-typeset h3::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, var(--xi-color), var(--yin-color), var(--sheng-color));
}
[data-md-color-scheme="xiyin-dark"] .md-typeset h3 {
  color: var(--pearl);
  background: linear-gradient(90deg, rgba(212,165,116,0.12), transparent);
}

/* H4 · 古铜金 */
.md-typeset h4 {
  color: var(--yin-color-deep);
  font-weight: 700;
  font-family: var(--font-serif-cn);
}
[data-md-color-scheme="xiyin-dark"] .md-typeset h4 { color: var(--yin-color-light); }

/* ─── L3 技术文档：H1 保持 Domain 样式但用无衬线；H2/H3 用黑体 ── */
body.level-l3 .md-typeset h1 {
  font-family: var(--font-sans-cn);
  font-weight: 800;
}
body.level-l3 .md-typeset h2 {
  font-family: var(--font-sans-cn);
  font-weight: 700;
  font-size: 20px;
}
body.level-l3 .md-typeset h3 {
  font-family: var(--font-sans-cn);
  font-weight: 600;
  font-size: 16px;
}

/* ─── 引用块 · 三色渐变左条 ─────────────────────────────── */
.md-typeset blockquote {
  color: var(--md-default-fg-color--light);
  border-left: 3px solid transparent;
  border-image: var(--gradient-trinity) 1;
  background: linear-gradient(135deg, var(--paper-warm), var(--paper));
  padding: 14px 22px;
  border-radius: var(--radius-md);
}
[data-md-color-scheme="xiyin-dark"] .md-typeset blockquote {
  background: rgba(20,40,63,0.5);
}

/* ─── 行内代码 · 玫瑰金描边 ─────────────────────────────── */
.md-typeset code {
  font-family: var(--font-mono);
  border: 1px solid rgba(212,165,116,0.35);
  border-radius: var(--radius-sm);
  padding: 1px 6px;
  background: rgba(212,165,116,0.08);
}
[data-md-color-scheme="xiyin-dark"] .md-typeset code {
  background: rgba(212,165,116,0.1);
  border-color: rgba(212,165,116,0.25);
}

/* ─── 代码块 · 深色底 + 玫瑰金左条 ──────────────────────── */
.md-typeset pre > code { border: none; background: transparent; padding: 0; }
.md-typeset .highlight {
  border-left: 3px solid var(--yin-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin: 16px 0;
  position: relative;
}
.md-typeset .highlight::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; height: 2px;
  background: var(--gradient-trinity);
  z-index: 2;
}
.md-typeset .highlighttable {
  border-left: 3px solid var(--yin-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
}
.md-typeset .highlighttable::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; height: 2px;
  background: var(--gradient-trinity);
  z-index: 2;
}
[data-md-color-scheme="xiyin-light"] .md-typeset pre,
[data-md-color-scheme="xiyin-light"] .md-typeset .highlight pre,
[data-md-color-scheme="xiyin-light"] .md-typeset .highlighttable .highlight {
  background: var(--night-deep) !important;
  color: var(--pearl);
}
[data-md-color-scheme="xiyin-light"] .md-typeset pre code,
[data-md-color-scheme="xiyin-light"] .md-typeset .highlight pre code {
  color: var(--pearl);
}

.md-typeset .highlighttable .linenos {
  background: rgba(212,165,116,0.08);
  color: var(--pearl-mute);
  font-family: var(--font-mono);
  padding: 0.8em 0.6em;
  user-select: none;
}
[data-md-color-scheme="xiyin-light"] .md-typeset .highlighttable .linenos {
  background: rgba(11,28,46,0.9);
}
body.level-l1a .md-typeset .highlighttable .linenos,
body.level-l1b .md-typeset .highlighttable .linenos,
body.level-l2 .md-typeset .highlighttable .linenos {
  display: none;
}

/* ─── 表格 · 深色表头 + 顶部三色极光线 + 左侧玫瑰金线（无 tr:hover 彩色底）── */
.md-typeset__table {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--md-typeset-table-color);
  box-shadow: var(--shadow-card);
  position: relative;
  border-left: 3px solid var(--yin-color);
}
.md-typeset__table::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; height: 2px;
  background: var(--gradient-trinity);
  z-index: 2;
}
.md-typeset table:not([class]) {
  margin-top: 2px;
}
.md-typeset table:not([class]) thead {
  background: linear-gradient(180deg, var(--night-deep), var(--night-mid));
}
.md-typeset table:not([class]) thead th {
  color: var(--yin-color-light);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-weight: 600;
  padding: 12px 16px;
  border-bottom: 1px solid rgba(212,165,116,0.3);
}
/* 行 hover 彩色底已按用户规范移除 */
.md-typeset table:not([class]) td {
  padding: 11px 16px;
  font-size: 14px;
  vertical-align: top;
}

/* ─── 链接 · 玫瑰金虚线下划线 ───────────────────────────── */
.md-typeset a {
  border-bottom: 1px dashed var(--yin-color);
  text-decoration: none;
  transition: all var(--dur-fast);
}
.md-typeset a:hover {
  color: var(--xi-color) !important;
  border-bottom-color: var(--xi-color);
}
.md-nav a, .md-tabs a, .md-header a, .md-footer a,
.md-sidebar a, .md-search a, .md-toc a, .md-button {
  border-bottom: none !important;
}

/* ─── 侧栏高亮 ────────────────────────────────────────── */
.md-nav__link--active,
.md-nav__item--active > .md-nav__link {
  color: var(--yin-color-deep) !important;
  font-weight: 600;
}
[data-md-color-scheme="xiyin-dark"] .md-nav__link--active,
[data-md-color-scheme="xiyin-dark"] .md-nav__item--active > .md-nav__link {
  color: var(--yin-color-light) !important;
}
.md-sidebar--primary .md-nav__item--active > .md-nav__link {
  border-left: 3px solid var(--yin-color);
  padding-left: 11px;
  margin-left: -3px;
}

/* ─── Admonition · 核心说明统一为青色 ──────────────────── */
.md-typeset .admonition,
.md-typeset details {
  border: 1px solid var(--md-typeset-table-color);
  border-left: 4px solid var(--sheng-color);   /* 默认：极光青 */
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
  transition: all var(--dur-normal);
}
.md-typeset .admonition::before,
.md-typeset details::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; height: 2px;
  background: var(--gradient-trinity);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur-slow);
  z-index: 2;
}
.md-typeset .admonition:hover::before,
.md-typeset details:hover::before { transform: scaleX(1); }

.md-typeset .admonition-title,
.md-typeset details > summary {
  background: rgba(93,222,207,0.08);
  color: var(--sheng-color-deep);
  font-weight: 700;
}
[data-md-color-scheme="xiyin-dark"] .md-typeset .admonition-title,
[data-md-color-scheme="xiyin-dark"] .md-typeset details > summary {
  color: var(--sheng-color-light);
  background: rgba(93,222,207,0.12);
}
.md-typeset .admonition-title::before,
.md-typeset details > summary::before {
  background-color: var(--sheng-color);
}

/* 变体色保留（tip/warning/success/danger） */
.md-typeset .admonition.tip, .md-typeset details.tip { border-left-color: var(--sheng-color); }
.md-typeset .admonition.note, .md-typeset details.note { border-left-color: var(--xi-color); }
.md-typeset .admonition.note .admonition-title,
.md-typeset details.note > summary { background: rgba(157,78,221,0.08); color: var(--xi-color-deep); }
.md-typeset .admonition.note .admonition-title::before,
.md-typeset details.note > summary::before { background-color: var(--xi-color); }

.md-typeset .admonition.warning, .md-typeset details.warning { border-left-color: var(--yin-color); }
.md-typeset .admonition.warning .admonition-title,
.md-typeset details.warning > summary { background: rgba(212,165,116,0.12); color: var(--yin-color-deep); }
.md-typeset .admonition.warning .admonition-title::before,
.md-typeset details.warning > summary::before { background-color: var(--yin-color); }

.md-typeset .admonition.success { border-left-color: var(--status-done); }
.md-typeset .admonition.danger  { border-left-color: var(--status-error); }

/* ─── 按钮 · 玫瑰金 ─────────────────────────────────────── */
.md-typeset .md-button {
  background: var(--yin-color);
  color: white;
  border: 1px solid var(--yin-color-deep);
  border-radius: var(--radius-md);
  font-family: var(--font-sans-mixed);
  letter-spacing: 0.05em;
  padding: 10px 22px;
  transition: all var(--dur-fast);
}
.md-typeset .md-button:hover {
  background: var(--yin-color-deep);
  color: white !important;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px -4px rgba(168,126,76,0.4);
}
.md-typeset .md-button--primary { background: var(--gradient-trinity); border: none; color: white; }

/* ─── 返回顶部 ──────────────────────────────────────────── */
.md-top {
  background: var(--yin-color);
  color: white;
  box-shadow: var(--shadow-glow-gold);
  border-radius: 50%;
}
.md-top:hover { background: var(--yin-color-deep); transform: translateY(-2px); }

/* ─── Footer ────────────────────────────────────────────── */
.md-footer {
  background: linear-gradient(180deg, var(--night-deep), var(--night-abyss));
  position: relative;
}
.md-footer::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; height: 1px;
  background: var(--gradient-topline);
  opacity: 0.7;
}
.md-footer-meta {
  background: var(--night-abyss);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.15em;
}
.md-footer-meta__inner { color: var(--pearl-mute); }
.md-footer-copyright { color: var(--yin-color); }
.md-footer-copyright::after {
  content: ' · Xi Yin Acoustic';
  color: var(--yin-color-deep);
  font-family: var(--font-serif-en);
  font-style: italic;
  letter-spacing: 0.2em;
  margin-left: 8px;
}

/* ═══════════════════════════════════════════════════════════ */
/*  Hero 区 · L1A / L1B / L2 / L3 四档差异化                   */
/* ═══════════════════════════════════════════════════════════ */

.md-typeset .xy-hero {
  margin: -24px -1.2rem 40px;
  padding: 80px 40px 60px;
  background:
    radial-gradient(ellipse at top right, rgba(93,222,207,0.12), transparent 50%),
    radial-gradient(ellipse at bottom left, rgba(212,165,116,0.14), transparent 50%),
    radial-gradient(ellipse at center, rgba(157,78,221,0.08), transparent 60%),
    linear-gradient(180deg, var(--night-abyss), var(--night-deep) 50%, var(--night-mid));
  color: var(--pearl);
  text-align: center;
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  min-height: 55vh;
}
.md-typeset .xy-hero::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; height: 3px;
  background: var(--gradient-topline);
}
.md-typeset .xy-hero .xy-hero-label {
  font-family: var(--font-serif-en);
  font-size: 12px;
  color: var(--yin-color);
  letter-spacing: 0.4em;
  text-transform: uppercase;
  font-style: italic;
  font-weight: 600;
  margin-bottom: 20px;
  display: inline-flex;
  align-items: center;
  gap: 18px;
}
.md-typeset .xy-hero .xy-hero-label::before,
.md-typeset .xy-hero .xy-hero-label::after {
  content: '';
  width: 40px; height: 1px;
  background: linear-gradient(90deg, transparent, var(--yin-color), transparent);
}
.md-typeset .xy-hero h1 {
  /* Hero 内的 H1 覆盖 domain 样式（回归金属渐变大字） */
  display: block;
  grid-template-columns: initial;
  padding: 0;
  margin: 0 0 14px;
  background: var(--gradient-brand-name);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  border: none;
  border-radius: 0;
  font-family: var(--font-serif-cn);
  font-size: 64px;
  font-weight: 900;
  letter-spacing: 0.06em;
  line-height: 1.1;
  color: inherit !important;
  filter: drop-shadow(0 0 28px rgba(212,165,116,0.3));
  text-align: center;
}
.md-typeset .xy-hero h1::before { display: none; }
.md-typeset .xy-hero .xy-hero-sub {
  font-family: var(--font-serif-en);
  font-size: 20px;
  color: var(--pearl-dim);
  font-style: italic;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  margin-bottom: 10px;
}
.md-typeset .xy-hero .xy-hero-meta {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--pearl-mute);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-top: 8px;
}
.md-typeset .xy-hero .xy-hero-meta span { color: var(--yin-color); margin: 0 8px; }
.md-typeset .xy-hero .xy-hero-tagline {
  font-family: var(--font-serif-en);
  font-size: 16px;
  color: var(--yin-color-light);
  font-style: italic;
  letter-spacing: 0.08em;
  margin: 24px auto 0;
  max-width: 720px;
  line-height: 1.6;
}
.md-typeset .xy-hero-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 2px;
  margin-top: 40px;
  background: rgba(212,165,116,0.15);
  padding: 1px;
  border-radius: var(--radius-xs);
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}
.md-typeset .xy-hero-stats .xy-stat {
  background: linear-gradient(180deg, rgba(11,28,46,0.8), rgba(20,40,63,0.8));
  padding: 24px 16px;
  text-align: center;
  position: relative;
  transition: all var(--dur-normal);
}
.md-typeset .xy-hero-stats .xy-stat:hover {
  background: linear-gradient(180deg, rgba(20,40,63,0.9), rgba(30,58,82,0.9));
}
.md-typeset .xy-hero-stats .xy-stat::before {
  content: '';
  position: absolute;
  top: 12px; left: 50%;
  transform: translateX(-50%);
  width: 30px; height: 1px;
  background: var(--yin-color);
  opacity: 0.5;
}
.md-typeset .xy-hero-stats .xy-stat-num {
  font-family: var(--font-serif-en);
  font-size: 36px;
  font-weight: 500;
  line-height: 1;
  background: linear-gradient(180deg, var(--yin-color-light), var(--yin-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: 0.02em;
}
.md-typeset .xy-hero-stats .xy-stat-label {
  font-size: 10px;
  color: var(--pearl-dim);
  letter-spacing: 0.2em;
  margin-top: 8px;
  text-transform: uppercase;
  font-family: var(--font-mono);
}

/* 星空 + 涟漪（L1A 用） */
.xy-stars { position: absolute; inset: 0; pointer-events: none; overflow: hidden; z-index: 0; }
.xy-star { position: absolute; border-radius: 50%; animation: xy-twinkle 4s ease-in-out infinite; }
@keyframes xy-twinkle {
  0%, 100% { opacity: 0; transform: scale(0.5); }
  50% { opacity: var(--star-max, 0.8); transform: scale(1); }
}
.xy-ripple-stage {
  position: absolute; left: 50%; top: 50%;
  width: 200px; height: 200px;
  transform: translate(-50%, -30%);
  pointer-events: none; z-index: 1;
}
.xy-ripple {
  position: absolute; left: 50%; top: 50%;
  border-radius: 50%; border: 2px solid;
  opacity: 0;
  transform: translate(-50%, -50%);
  animation: xy-ripple-expand 4s ease-out infinite;
}
@keyframes xy-ripple-expand {
  0% { width: 18px; height: 18px; opacity: 0.9; border-width: 2px; }
  100% { width: 360px; height: 360px; opacity: 0; border-width: 0.3px; }
}
.xy-ripple.r-xi    { border-color: var(--xi-color); animation-delay: 0s; }
.xy-ripple.r-yin   { border-color: var(--yin-color); animation-delay: 1.3s; }
.xy-ripple.r-sheng { border-color: var(--sheng-color); animation-delay: 2.6s; }
.xy-ripple-origin {
  position: absolute; left: 50%; top: 50%;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--pearl), var(--yin-color-light) 40%, var(--yin-color));
  box-shadow: 0 0 25px var(--yin-color), 0 0 50px rgba(212,165,116,0.5);
  z-index: 5;
  transform: translate(-50%, -50%);
  animation: xy-origin-pulse 3s ease-in-out infinite;
}
@keyframes xy-origin-pulse {
  0%, 100% { transform: translate(-50%, -50%) scale(1); box-shadow: 0 0 25px var(--yin-color); }
  50% { transform: translate(-50%, -50%) scale(1.3); box-shadow: 0 0 45px var(--yin-color); }
}
.md-typeset .xy-hero > :not(.xy-stars):not(.xy-ripple-stage) {
  position: relative; z-index: 10;
}
body.level-l2 .md-typeset .xy-hero { min-height: 40vh; padding: 70px 40px 50px; }
body.level-l2 .md-typeset .xy-hero h1 { font-size: 48px; }

/* L3 Hero 雅致式 */
body.level-l3 .md-typeset .xy-hero {
  min-height: auto;
  padding: 50px 36px 36px 48px;
  background: linear-gradient(90deg, rgba(212,165,116,0.05), transparent 30%), var(--paper);
  color: var(--xy-text-primary);
  text-align: left;
  border-radius: var(--radius-lg);
  border-left: 4px solid var(--yin-color);
  box-shadow: 0 2px 8px -4px rgba(11,28,46,0.08);
}
body.level-l3 .md-typeset .xy-hero::before { height: 2px; }
body.level-l3 .md-typeset .xy-hero .xy-hero-label {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--yin-color-deep);
  letter-spacing: 0.25em;
  margin-bottom: 16px;
  font-style: normal;
  display: block;
}
body.level-l3 .md-typeset .xy-hero .xy-hero-label::before,
body.level-l3 .md-typeset .xy-hero .xy-hero-label::after { display: none; }
body.level-l3 .md-typeset .xy-hero h1 {
  font-family: var(--font-sans-cn);
  font-size: 32px;
  font-weight: 800;
  color: var(--night-deep);
  background: none;
  -webkit-text-fill-color: var(--night-deep);
  filter: none;
  letter-spacing: 0.02em;
  margin: 0 0 10px;
  line-height: 1.3;
  text-align: left;
}
body.level-l3 .md-typeset .xy-hero .xy-hero-sub {
  font-family: var(--font-sans-mixed);
  font-size: 15px;
  color: var(--xy-text-body);
  font-style: normal;
  letter-spacing: 0;
  text-transform: none;
  margin-bottom: 14px;
  line-height: 1.6;
}
body.level-l3 .md-typeset .xy-hero .xy-hero-meta {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--xy-text-muted);
  letter-spacing: 0.12em;
  text-transform: none;
}
[data-md-color-scheme="xiyin-dark"] body.level-l3 .md-typeset .xy-hero {
  background: linear-gradient(90deg, rgba(212,165,116,0.08), transparent 30%), var(--night-deep);
  color: var(--pearl);
}
[data-md-color-scheme="xiyin-dark"] body.level-l3 .md-typeset .xy-hero h1 {
  color: var(--pearl);
  -webkit-text-fill-color: var(--pearl);
}
[data-md-color-scheme="xiyin-dark"] body.level-l3 .md-typeset .xy-hero .xy-hero-sub {
  color: var(--pearl-dim);
}

/* ═══════════════════════════════════════════════════════════ */
/*  特殊组件（Grid Cards / 引言卡 / 五层堆叠 / 工作流）         */
/* ═══════════════════════════════════════════════════════════ */

.md-typeset .grid.cards > :is(ul, ol) > li,
.md-typeset .grid > .card {
  border: 1px solid var(--md-typeset-table-color);
  border-radius: var(--radius-lg);
  padding: 24px 24px;
  position: relative;
  overflow: hidden;
  transition: all var(--dur-normal);
  box-shadow: 0 2px 8px -4px rgba(11,28,46,0.06);
}
.md-typeset .grid.cards > :is(ul, ol) > li::before,
.md-typeset .grid > .card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; height: 2px;
  background: var(--gradient-trinity);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur-slow);
}
.md-typeset .grid.cards > :is(ul, ol) > li:hover,
.md-typeset .grid > .card:hover {
  border-color: var(--yin-color);
  transform: translateY(-3px);
  box-shadow: var(--shadow-card-hover);
}
.md-typeset .grid.cards > :is(ul, ol) > li:hover::before,
.md-typeset .grid > .card:hover::before { transform: scaleX(1); }

.md-typeset .xy-quote {
  background:
    radial-gradient(ellipse at top right, rgba(93,222,207,0.1), transparent 50%),
    radial-gradient(ellipse at bottom left, rgba(212,165,116,0.1), transparent 50%),
    linear-gradient(180deg, var(--night-deep), var(--night-mid));
  color: var(--pearl);
  padding: 60px 50px;
  border-radius: var(--radius-md);
  text-align: center;
  position: relative;
  overflow: hidden;
  margin: 30px auto;
  border: 1px solid rgba(212,165,116,0.2);
}
.md-typeset .xy-quote::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, transparent, var(--yin-color), var(--sheng-color), var(--yin-color), transparent);
}
.md-typeset .xy-quote-mark {
  font-family: var(--font-serif-en);
  font-size: 80px;
  color: var(--yin-color);
  line-height: 0.6;
  margin-bottom: 20px;
  opacity: 0.5;
}
.md-typeset .xy-quote-content {
  font-family: var(--font-serif-en);
  font-size: 24px;
  font-style: italic;
  color: var(--yin-color-light);
  letter-spacing: 0.03em;
  line-height: 1.5;
  margin-bottom: 18px;
}
.md-typeset .xy-quote-signature {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--pearl-mute);
  letter-spacing: 0.3em;
  text-transform: uppercase;
}

.md-typeset .xy-stack {
  margin: 30px 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.md-typeset .xy-stack-layer {
  padding: 22px 28px;
  background: linear-gradient(90deg, var(--night-deep), var(--night-mid));
  color: var(--pearl);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  gap: 20px;
  border: 1px solid rgba(212,165,116,0.15);
  transition: all var(--dur-normal);
  position: relative;
  overflow: hidden;
}
.md-typeset .xy-stack-layer:hover {
  border-color: var(--yin-color);
  transform: translateX(-4px);
  box-shadow: -6px 12px 24px -12px rgba(11,28,46,0.3);
}
.md-typeset .xy-stack-layer.highlight {
  background:
    radial-gradient(ellipse at top right, rgba(93,222,207,0.12), transparent 60%),
    linear-gradient(90deg, var(--night-deep), var(--night-hover));
  border-color: var(--yin-color);
}
.md-typeset .xy-stack-layer.highlight::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0; width: 4px;
  background: var(--gradient-trinity);
}
.md-typeset .xy-stack-badge {
  font-family: var(--font-serif-en);
  font-size: 28px;
  font-weight: 500;
  color: var(--yin-color);
  min-width: 56px;
  font-style: italic;
  letter-spacing: 0.05em;
  flex-shrink: 0;
}
.md-typeset .xy-stack-layer.highlight .xy-stack-badge {
  background: linear-gradient(180deg, var(--yin-color-light), var(--yin-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.md-typeset .xy-stack-info { flex: 1; min-width: 0; }
.md-typeset .xy-stack-name {
  font-family: var(--font-serif-cn);
  font-size: 17px;
  letter-spacing: 0.03em;
  color: var(--pearl);
  margin-bottom: 4px;
  font-weight: 500;
}
.md-typeset .xy-stack-layer.highlight .xy-stack-name { color: var(--yin-color-light); }
.md-typeset .xy-stack-desc {
  font-size: 12px;
  color: var(--pearl-dim);
  letter-spacing: 0.05em;
  font-style: italic;
}
.md-typeset .xy-stack-tag {
  font-size: 10px;
  color: var(--night-deep);
  background: linear-gradient(135deg, var(--yin-color-light), var(--yin-color));
  padding: 5px 14px;
  letter-spacing: 0.2em;
  font-weight: 700;
  border-radius: var(--radius-xs);
  flex-shrink: 0;
}

/* 工作流数字步骤 */
.md-typeset .xy-workflow {
  margin: 28px 0;
  counter-reset: xy-step;
  padding-left: 0;
}
.md-typeset .xy-workflow ol {
  list-style: none;
  padding-left: 0;
  position: relative;
}
.md-typeset .xy-workflow ol::before {
  content: '';
  position: absolute;
  left: 14px; top: 14px; bottom: 14px;
  width: 1px;
  background: linear-gradient(180deg, var(--xi-color), var(--yin-color) 50%, var(--sheng-color));
  opacity: 0.35;
}
.md-typeset .xy-workflow ol > li {
  counter-increment: xy-step;
  list-style: none;
  position: relative;
  padding: 10px 0 10px 44px;
  font-size: 15px;
  color: var(--md-default-fg-color);
  line-height: 1.7;
}
.md-typeset .xy-workflow ol > li::before {
  content: counter(xy-step, decimal-leading-zero);
  position: absolute;
  left: 0; top: 10px;
  width: 28px; height: 28px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--yin-color-light), var(--yin-color));
  color: var(--night-deep);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 0 3px var(--paper), 0 0 0 4px rgba(212,165,116,0.3);
}
[data-md-color-scheme="xiyin-dark"] .md-typeset .xy-workflow ol > li::before {
  box-shadow: 0 0 0 3px var(--night-deep), 0 0 0 4px rgba(212,165,116,0.5);
}

/* 语言切换器 */
.xy-lang-switcher { position: relative; display: inline-block; }
.xy-lang-toggle {
  background: transparent;
  border: 1px solid transparent;
  color: var(--pearl-dim);
  font-family: var(--font-sans-mixed);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.05em;
  padding: 6px 12px;
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: all var(--dur-fast);
}
.xy-lang-toggle:hover {
  color: var(--yin-color-light);
  border-color: rgba(212,165,116,0.2);
  background: rgba(212,165,116,0.08);
}
.xy-lang-menu {
  position: absolute;
  top: calc(100% + 4px);
  right: 0;
  background: var(--night-deep);
  border: 1px solid rgba(212,165,116,0.3);
  border-radius: var(--radius-lg);
  min-width: 120px;
  list-style: none;
  padding: 4px 0;
  margin: 0;
  box-shadow: var(--shadow-ide);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all var(--dur-fast);
  z-index: 1000;
}
.xy-lang-switcher:hover .xy-lang-menu,
.xy-lang-switcher:focus-within .xy-lang-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.xy-lang-menu li { position: relative; }
.xy-lang-menu li a {
  display: block;
  padding: 8px 16px;
  color: var(--pearl-dim);
  text-decoration: none;
  font-size: 13px;
  transition: all var(--dur-fast);
}
.xy-lang-menu li a:hover {
  color: var(--yin-color-light);
  background: rgba(212,165,116,0.08);
}
.xy-lang-menu li.is-active a {
  color: var(--yin-color-light);
  border-left: 2px solid var(--yin-color);
  padding-left: 14px;
}

/* ─── 响应式 ──────────────────────────────────────────── */
@media screen and (max-width: 768px) {
  .md-typeset h1 {
    grid-template-columns: 60px 1fr;
    padding: 18px 20px;
    font-size: 20px;
    gap: 14px;
  }
  .md-typeset h1 .h1-meta { display: none; }
  .md-typeset .xy-hero {
    margin: -16px -0.8rem 24px;
    padding: 50px 20px 36px;
    min-height: auto;
  }
  .md-typeset .xy-hero h1 { font-size: 36px; padding: 0; }
  .md-typeset .xy-hero .xy-hero-sub { font-size: 14px; letter-spacing: 0.15em; }
  body.level-l3 .md-typeset h1 { font-size: 22px; }
  .md-typeset .xy-stack-layer {
    flex-wrap: wrap;
    padding: 16px 18px;
    gap: 12px;
  }
  .md-typeset .xy-stack-badge { font-size: 22px; min-width: auto; }
  .md-typeset .xy-stack-name { font-size: 15px; }
  .md-typeset .xy-stack-desc { font-size: 11px; }
}

/* ─── 打印样式 ────────────────────────────────────────── */
@media print {
  body::before,
  .md-header, .md-tabs, .md-sidebar, .md-footer-nav, .md-top { display: none !important; }
  .md-typeset .xy-hero {
    background: white !important;
    color: var(--night-deep) !important;
    box-shadow: none !important;
  }
  .md-typeset .xy-hero h1 {
    background: none !important;
    -webkit-text-fill-color: var(--night-deep) !important;
    color: var(--night-deep) !important;
    filter: none !important;
  }
  .md-typeset .highlight {
    background: var(--paper-warm) !important;
    border-left-color: var(--yin-color) !important;
  }
  .md-typeset h1 {
    background: white !important;
    color: var(--night-deep) !important;
    border: 1px solid var(--yin-color) !important;
  }
}

/* ═══════════════════════════════════════════════════════════ */
/*  v4 追加（2026-05 ·样板改造）                                */
/*  - body 米纸金色底（章节卡白底形成衬托）                      */
/*  - 大 Domain 章节卡 .xy-domain-header                         */
/*  - 本篇 Chapter 子标题卡 .xy-chapter-header                   */
/*  - 轻量条目卡 .xy-item-card（白底 + hover 顶三色线）          */
/*  - 右侧 TOC 隐藏 + 正文扩宽                                    */
/*  - 左侧 TOC 克隆样式 .xy-toc-inline                           */
/* ═══════════════════════════════════════════════════════════ */

/* ─── body / 正文区米纸金色底 ─── */
[data-md-color-scheme="xiyin-light"] body,
[data-md-color-scheme="xiyin-light"] .md-main,
[data-md-color-scheme="xiyin-light"] .md-container {
  background-color: #FBFAF6;
}
[data-md-color-scheme="xiyin-light"] .md-content {
  background-color: transparent;
}

/* ─── 大 Domain 章节卡（深夜蓝 + 顶三色线 + 三行布局）─── */
.md-typeset .xy-domain-header {
  display: grid;
  grid-template-columns: 96px 1fr auto;
  gap: 28px;
  align-items: center;
  margin: 10px 0 28px;
  padding: 26px 34px;
  background:
    radial-gradient(ellipse at top right, rgba(93,222,207,0.12), transparent 55%),
    radial-gradient(ellipse at bottom left, rgba(212,165,116,0.14), transparent 55%),
    linear-gradient(135deg, var(--night-deep), var(--night-mid));
  color: var(--pearl);
  border-radius: var(--radius-md);
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(212,165,116,0.25);
}
.md-typeset .xy-domain-header::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; height: 3px;
  background: var(--gradient-trinity);
}
.md-typeset .xy-domain-header .xy-domain-num {
  font-family: var(--font-serif-cn);
  font-size: 58px;
  font-weight: 900;
  background: linear-gradient(180deg, var(--yin-color-light), var(--yin-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 0.95;
  letter-spacing: 0.02em;
  text-align: center;
}
.md-typeset .xy-domain-header .xy-domain-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}
.md-typeset .xy-domain-header .xy-domain-en {
  font-family: var(--font-serif-en);
  font-size: 12px;
  color: var(--yin-color);
  letter-spacing: 0.3em;
  text-transform: uppercase;
  font-style: italic;
  font-weight: 600;
}
.md-typeset .xy-domain-header .xy-domain-name {
  font-family: var(--font-serif-cn);
  font-size: 28px;
  color: var(--yin-color-light);
  font-weight: 700;
  letter-spacing: 0.1em;
  margin: 4px 0 6px;
  line-height: 1.2;
}
.md-typeset .xy-domain-header .xy-domain-desc {
  font-size: 13px;
  color: var(--pearl-dim);
  letter-spacing: 0.08em;
  line-height: 1.7;
}
.md-typeset .xy-domain-header .xy-domain-stat {
  text-align: right;
  font-size: 11px;
  color: var(--pearl-mute);
  letter-spacing: 0.14em;
  font-family: var(--font-mono);
  text-transform: uppercase;
}
.md-typeset .xy-domain-header .xy-domain-stat strong {
  display: block;
  font-family: var(--font-serif-en);
  font-size: 26px;
  color: var(--yin-color);
  font-weight: 500;
  font-style: italic;
  letter-spacing: 0.03em;
  margin-bottom: 4px;
}
@media screen and (max-width: 768px) {
  .md-typeset .xy-domain-header {
    grid-template-columns: 64px 1fr;
    padding: 18px 20px;
    gap: 16px;
  }
  .md-typeset .xy-domain-header .xy-domain-num { font-size: 42px; }
  .md-typeset .xy-domain-header .xy-domain-name { font-size: 21px; }
  .md-typeset .xy-domain-header .xy-domain-stat { display: none; }
}

/* ─── 本篇 Chapter 子标题卡（白底 + 金左条 + 衬线）─── */
.md-typeset .xy-chapter-header {
  margin: 0 0 32px;
  padding: 18px 24px 18px 26px;
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-left: 4px solid var(--yin-color);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  position: relative;
  overflow: hidden;
  box-shadow: 0 2px 8px -4px rgba(11,28,46,0.06);
}
.md-typeset .xy-chapter-header::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; height: 2px;
  background: var(--gradient-trinity);
}
.md-typeset .xy-chapter-header .xy-chapter-en {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--yin-color-deep);
  letter-spacing: 0.25em;
  text-transform: uppercase;
  font-weight: 600;
  margin-bottom: 4px;
}
.md-typeset .xy-chapter-header .xy-chapter-name {
  font-family: var(--font-serif-cn);
  font-size: 20px;
  color: var(--night-deep);
  font-weight: 700;
  letter-spacing: 0.06em;
  line-height: 1.3;
  margin-bottom: 4px;
}
.md-typeset .xy-chapter-header .xy-chapter-desc {
  font-family: var(--font-serif-en);
  font-size: 13px;
  color: var(--xy-text-muted);
  font-style: italic;
  letter-spacing: 0.05em;
}
[data-md-color-scheme="xiyin-dark"] .md-typeset .xy-chapter-header {
  background: var(--night-mid);
  border-color: rgba(212,165,116,0.2);
}
[data-md-color-scheme="xiyin-dark"] .md-typeset .xy-chapter-header .xy-chapter-name {
  color: var(--pearl);
}

/* ─── 轻量条目卡 .xy-item-card（白底 + 金左条 + hover 顶三色线）─── */
.md-typeset .xy-item-card {
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-left: 4px solid var(--yin-color);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 22px 28px;
  margin: 20px 0;
  position: relative;
  overflow: hidden;
  transition: all var(--dur-normal);
  box-shadow: 0 2px 8px -4px rgba(11,28,46,0.06);
}
.md-typeset .xy-item-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; height: 2px;
  background: var(--gradient-trinity);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur-slow);
}
.md-typeset .xy-item-card:hover {
  border-color: var(--yin-color);
  border-left-color: var(--yin-color);
  transform: translateY(-2px);
  box-shadow: var(--shadow-card-hover);
}
.md-typeset .xy-item-card:hover::before {
  transform: scaleX(1);
}
.md-typeset .xy-item-card .xy-item-content {
  font-family: var(--font-serif-cn);
  font-size: 16px;
  color: var(--night-deep);
  line-height: 1.8;
  letter-spacing: 0.05em;
}
.md-typeset .xy-item-card .xy-item-content strong {
  color: var(--yin-color-deep);
  font-weight: 700;
}
.md-typeset .xy-item-card .xy-item-signature {
  margin-top: 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--xy-text-muted);
  letter-spacing: 0.2em;
  text-transform: uppercase;
}
[data-md-color-scheme="xiyin-dark"] .md-typeset .xy-item-card {
  background: var(--night-mid);
  border-color: rgba(212,165,116,0.2);
}
[data-md-color-scheme="xiyin-dark"] .md-typeset .xy-item-card .xy-item-content {
  color: var(--pearl);
}
[data-md-color-scheme="xiyin-dark"] .md-typeset .xy-item-card .xy-item-content strong {
  color: var(--yin-color-light);
}

/* ─── 右侧 TOC 隐藏 + 正文扩宽 ─── */
@media screen and (min-width: 76.25em) {
  .md-sidebar--secondary {
    display: none !important;
  }
  .md-content {
    max-width: none !important;
  }
  .md-main__inner {
    max-width: 66rem;
  }
}

/* ─── 左侧 TOC 克隆（.xy-toc-inline，由 xiyin-toc-merge.js 注入）─── */
.md-sidebar--primary .xy-toc-inline-label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--yin-color-deep);
  padding: 4px 10px;
  margin: 6px 0 4px;
  opacity: 0.7;
}
.md-sidebar--primary .xy-toc-inline {
  list-style: none;
  margin: 0 0 10px 0;
  padding: 6px 0 6px 14px;
  border-left: 1px dashed rgba(212,165,116,0.35);
}
.md-sidebar--primary .xy-toc-inline ul {
  list-style: none;
  margin: 2px 0;
  padding-left: 12px;
  border-left: 1px dashed rgba(212,165,116,0.2);
}
.md-sidebar--primary .xy-toc-inline li {
  list-style: none;
  margin: 0;
  padding: 0;
}
.md-sidebar--primary .xy-toc-inline a {
  display: block;
  padding: 4px 10px;
  font-size: 12.5px;
  color: var(--md-default-fg-color--light);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: all var(--dur-fast);
  letter-spacing: 0.02em;
  line-height: 1.5;
  border-bottom: none !important;
}
.md-sidebar--primary .xy-toc-inline a:hover {
  color: var(--yin-color-deep) !important;
  border-left-color: var(--yin-color);
  background: rgba(212,165,116,0.08);
}
[data-md-color-scheme="xiyin-dark"] .md-sidebar--primary .xy-toc-inline a:hover {
  color: var(--yin-color-light) !important;
}
.md-sidebar--primary .xy-toc-inline a.is-active {
  color: var(--yin-color-deep) !important;
  border-left-color: var(--yin-color);
  font-weight: 600;
  background: linear-gradient(90deg, rgba(212,165,116,0.1), transparent);
}