/* ==========================================================================
   WP Pure CMS · 纯文字风排版与高密度布局样式系统
   ========================================================================== */

:root {
  /* 纯文字出版灰阶体系 */
  --bg-main: #ffffff;
  --bg-surface: #f9fafb;
  --bg-surface-elevated: #ffffff;
  --bg-hover: #f3f4f6;
  --bg-code: #0f172a;
  
  --text-primary: #111827;     /* 饱满石墨墨色 */
  --text-secondary: #4b5563;   /* 中冷灰 */
  --text-muted: #9ca3af;       /* 浅灰元信息 */
  --text-code: #f8fafc;
  
  --border-color: #e5e7eb;     /* 发丝级纯粹边框 */
  --border-subtle: #f3f4f6;
  
  --accent: #1e3a8a;           /* 经典出版深靛蓝 */
  --accent-hover: #1d4ed8;
  --accent-light: #eff6ff;
  --accent-border: #bfdbfe;
  
  /* 字体族定义 */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --font-serif: "Noto Serif SC", "Source Han Serif SC", Georgia, "Songti SC", "SimSun", serif;
  --font-mono: ui-monospace, SFMono-Regular, "JetBrains Mono", Menlo, Monaco, Consolas, monospace;
  
  --font-body: var(--font-sans);
  --font-title: var(--font-sans);
  
  /* 布局尺度 */
  --container-max: 1200px;
  --content-w: 800px;
  --sidebar-w: 360px;
  --gap-layout: 2.25rem;       /* 36px 严密黄金分栏间距 */
}

/* 深色模式：沉静冷墨 Obsidian 体系 */
[data-theme="dark"] {
  --bg-main: #0b0f17;
  --bg-surface: #111827;
  --bg-surface-elevated: #151d2e;
  --bg-hover: #1f2937;
  --bg-code: #030712;
  
  --text-primary: #f3f4f6;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;
  --text-code: #e2e8f0;
  
  --border-color: rgba(255, 255, 255, 0.08);
  --border-subtle: rgba(255, 255, 255, 0.04);
  
  --accent: #60a5fa;
  --accent-hover: #93c5fd;
  --accent-light: rgba(96, 165, 250, 0.1);
  --accent-border: rgba(96, 165, 250, 0.25);
}

/* 基础重置 */
*, *::before, *::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  background-color: var(--bg-main);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 15.5px;
  line-height: 1.75;
  letter-spacing: 0.005em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  transition: background-color 0.2s ease, color 0.2s ease;
}

a {
  color: inherit;
  text-decoration: none;
}

/* ==========================================================================
   1. 顶部刊头与主导航条 (Masthead Header)
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 90;
  background: var(--bg-main);
  border-bottom: 1px solid var(--border-color);
  transition: border-color 0.2s ease;
}

.header-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 58px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-shrink: 0;
}

.site-brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.brand-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  background: var(--text-primary);
  color: var(--bg-main);
  font-size: 0.72rem;
  font-weight: 900;
  border-radius: 4px;
}

/* 单行水平主菜单 */
.header-nav {
  display: flex;
  align-items: center;
}

.header-nav ul.nav-menu {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.header-nav li {
  position: relative;
}

.header-nav li a {
  display: inline-flex;
  align-items: center;
  padding: 0.35rem 0.65rem;
  font-size: 0.86rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: 4px;
  transition: all 0.15s ease;
  white-space: nowrap;
}

.header-nav li a:hover {
  color: var(--text-primary);
  background: var(--bg-surface);
}

.header-nav li.current-menu-item > a,
.header-nav li.active > a {
  color: var(--text-primary);
  font-weight: 700;
  background: var(--bg-surface);
}

.header-right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}

/* 顶栏快速搜索 */
.header-search-form {
  position: relative;
  display: flex;
  align-items: center;
}

.search-input-box {
  width: 190px;
  padding: 0.38rem 2rem 0.38rem 0.75rem;
  font-size: 0.82rem;
  background: var(--bg-surface);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: 5px;
  outline: none;
  transition: all 0.15s ease;
}

.search-input-box:focus {
  width: 240px;
  border-color: var(--accent);
  background: var(--bg-main);
}

.search-icon-btn {
  position: absolute;
  right: 0.5rem;
  background: none;
  border: none;
  padding: 0;
  color: var(--text-muted);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
}

/* 模式切换按钮 */
.theme-btn {
  background: none;
  border: 1px solid var(--border-color);
  padding: 0.35rem 0.65rem;
  border-radius: 5px;
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 0.8rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  transition: all 0.15s ease;
}

.theme-btn:hover {
  color: var(--text-primary);
  border-color: var(--text-secondary);
}

/* 移动端汉堡按钮 */
.mobile-nav-toggle {
  display: none;
  background: none;
  border: none;
  padding: 0.4rem;
  color: var(--text-primary);
  cursor: pointer;
}

/* ==========================================================================
   2. 主体网格分栏 (Classic Dual-Column CMS Layout)
   ========================================================================== */
.site-main-layout {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 2.25rem 1.5rem 4rem;
  display: grid;
  grid-template-columns: minmax(0, 1fr) var(--sidebar-w);
  gap: var(--gap-layout);
  align-items: start;
}

.main-column {
  min-width: 0;
}

.sidebar-column {
  width: var(--sidebar-w);
  flex-shrink: 0;
}

/* ==========================================================================
   3. 首页：头条精要 (Featured Lead Article)
   ========================================================================== */
.featured-lead-box {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1.75rem 2rem;
  margin-bottom: 2rem;
  transition: border-color 0.15s ease;
}

.featured-lead-box:hover {
  border-color: var(--text-secondary);
}

.lead-meta-row {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.78rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.badge-lead {
  background: var(--text-primary);
  color: var(--bg-main);
  padding: 0.15rem 0.45rem;
  border-radius: 3px;
  font-size: 0.7rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.lead-category {
  color: var(--accent);
  text-transform: uppercase;
}

.lead-date {
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.lead-title {
  font-size: 1.6rem;
  font-weight: 800;
  line-height: 1.35;
  letter-spacing: -0.015em;
  margin: 0 0 0.75rem 0;
  color: var(--text-primary);
}

.lead-title a {
  color: inherit;
  transition: color 0.15s ease;
}

.lead-title a:hover {
  color: var(--accent);
}

.lead-excerpt {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin: 0 0 1rem 0;
}

.lead-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.lead-author {
  color: var(--text-secondary);
  font-weight: 600;
}

/* ==========================================================================
   4. 首页：行级紧凑文章流 (Compact Row Stream) - 极高信息密度
   ========================================================================== */
.section-headline-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 0.65rem;
  border-bottom: 2px solid var(--text-primary);
  margin-bottom: 1.25rem;
}

.section-headline-title {
  font-size: 0.95rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-primary);
  margin: 0;
}

.section-headline-count {
  font-size: 0.78rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
}

.compact-stream-list {
  display: flex;
  flex-direction: column;
}

.compact-row-item {
  display: grid;
  grid-template-columns: 88px 1fr auto;
  align-items: baseline;
  gap: 1rem;
  padding: 0.9rem 0.25rem;
  border-bottom: 1px solid var(--border-color);
  transition: background-color 0.12s ease;
}

.compact-row-item:hover {
  background-color: var(--bg-surface);
}

.compact-row-item:hover .row-title a {
  color: var(--accent);
}

.row-date {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  white-space: nowrap;
}

.row-content {
  min-width: 0;
}

.row-title {
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.4;
  margin: 0 0 0.25rem 0;
  color: var(--text-primary);
}

.row-title a {
  color: inherit;
  transition: color 0.12s ease;
}

.row-excerpt {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.row-meta-right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.78rem;
  color: var(--text-muted);
  white-space: nowrap;
}

.row-cat-tag {
  font-size: 0.74rem;
  font-weight: 600;
  color: var(--text-secondary);
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  padding: 0.1rem 0.4rem;
  border-radius: 3px;
}

.row-arrow {
  color: var(--text-muted);
  transition: transform 0.12s ease, color 0.12s ease;
}

.compact-row-item:hover .row-arrow {
  transform: translateX(3px);
  color: var(--accent);
}

/* 分页器 */
.cms-pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
}

.cms-pagination a,
.cms-pagination span {
  padding: 0.4rem 0.85rem;
  font-size: 0.85rem;
  font-weight: 600;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  color: var(--text-secondary);
}

.cms-pagination a:hover {
  color: var(--text-primary);
  border-color: var(--text-primary);
}

.cms-pagination .current {
  background: var(--text-primary);
  color: var(--bg-main);
  border-color: var(--text-primary);
}

/* ==========================================================================
   5. 侧边栏挂载组件 (Clean CMS Widgets)
   ========================================================================== */
.sidebar-box {
  background: var(--bg-main);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1.35rem 1.5rem;
  margin-bottom: 1.5rem;
}

.sidebar-box-title {
  font-size: 0.85rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-primary);
  margin: 0 0 1rem 0;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-color);
}

/* 站点宣言 */
.manifesto-text {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin: 0 0 0.85rem 0;
}

.manifesto-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
  background: var(--bg-surface);
  padding: 0.75rem;
  border-radius: 6px;
  border: 1px solid var(--border-color);
}

.stat-item-cell {
  text-align: center;
}

.stat-num-val {
  font-size: 1.35rem;
  font-weight: 800;
  font-family: var(--font-mono);
  color: var(--text-primary);
  line-height: 1.1;
}

.stat-label-desc {
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-top: 0.2rem;
}

/* 分类矩阵网格 */
.category-matrix-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.category-matrix-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.3rem 0.6rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: all 0.12s ease;
}

.category-matrix-pill:hover {
  color: var(--text-primary);
  border-color: var(--text-primary);
  background: var(--bg-main);
}

.pill-count {
  font-size: 0.7rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

/* 核心专栏列表 */
.curated-series-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.curated-series-item {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  padding: 0.5rem 0;
  border-bottom: 1px dashed var(--border-color);
  font-size: 0.88rem;
}

.curated-series-item:last-child {
  border-bottom: none;
}

.series-idx {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--text-muted);
}

.curated-series-item a {
  color: var(--text-primary);
  font-weight: 600;
  transition: color 0.12s ease;
}

.curated-series-item a:hover {
  color: var(--accent);
}

/* ==========================================================================
   6. 文章详情页排印 (Article Detail & Typography)
   ========================================================================== */
.breadcrumbs-bar {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
}

.breadcrumbs-bar a {
  color: var(--text-secondary);
}

.breadcrumbs-bar a:hover {
  color: var(--text-primary);
}

.article-header {
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-color);
}

.article-category-badge {
  display: inline-block;
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-light);
  border: 1px solid var(--accent-border);
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  margin-bottom: 0.75rem;
}

.article-main-title {
  font-size: 2rem;
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin: 0 0 1rem 0;
}

.article-meta-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.6rem;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.article-meta-row .meta-author {
  color: var(--text-primary);
  font-weight: 600;
}

/* 正文深度排版 */
.article-body {
  font-size: 16px;
  line-height: 1.82;
  color: var(--text-secondary);
}

.article-body p {
  margin-top: 0;
  margin-bottom: 1.45em;
  color: var(--text-secondary);
}

/* 首字下沉 */
.article-body.has-dropcap > p:first-of-type::first-letter {
  float: left;
  font-size: 3.4em;
  line-height: 0.85;
  font-weight: 800;
  margin-right: 0.15em;
  margin-bottom: -0.05em;
  color: var(--text-primary);
}

.article-body h2 {
  font-size: 1.45rem;
  font-weight: 800;
  line-height: 1.35;
  color: var(--text-primary);
  margin-top: 2.25rem;
  margin-bottom: 0.85rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--border-color);
}

.article-body h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-top: 1.75rem;
  margin-bottom: 0.65rem;
}

.article-body blockquote {
  margin: 1.75rem 0;
  padding: 0.85rem 1.25rem;
  background: var(--bg-surface);
  border-left: 3px solid var(--text-primary);
  border-radius: 0 6px 6px 0;
  font-style: italic;
  color: var(--text-primary);
}

.article-body blockquote p:last-child {
  margin-bottom: 0;
}

.article-body pre {
  margin: 1.75rem 0;
  padding: 1.25rem;
  background: var(--bg-code);
  color: var(--text-code);
  border-radius: 6px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.86rem;
  line-height: 1.6;
}

.article-body code:not(pre code) {
  font-family: var(--font-mono);
  font-size: 0.88em;
  padding: 0.15em 0.35em;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  color: var(--text-primary);
}

.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.75rem 0;
  font-size: 0.88rem;
}

.article-body th,
.article-body td {
  padding: 0.65rem 0.95rem;
  border: 1px solid var(--border-color);
  text-align: left;
}

.article-body th {
  background: var(--bg-surface);
  font-weight: 700;
  color: var(--text-primary);
}

/* 粘性 TOC 目录 (Sticky Table of Contents in Sidebar) */
.sticky-toc-box {
  position: sticky;
  top: 76px;
  background: var(--bg-main);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1.25rem 1.35rem;
}

.toc-header-strip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.85rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-color);
}

.toc-caption {
  font-size: 0.85rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-primary);
}

.toc-reading-progress {
  font-size: 0.74rem;
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--accent);
}

.toc-nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  max-height: 60vh;
  overflow-y: auto;
}

.toc-nav-list li {
  position: relative;
}

.toc-nav-list li a {
  display: block;
  font-size: 0.825rem;
  color: var(--text-secondary);
  padding: 0.3rem 0.5rem;
  border-radius: 4px;
  line-height: 1.4;
  transition: all 0.12s ease;
}

.toc-nav-list li a:hover {
  color: var(--text-primary);
  background: var(--bg-surface);
}

.toc-nav-list li.active a {
  color: var(--text-primary);
  font-weight: 700;
  background: var(--bg-surface);
}

.toc-nav-list li.active::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 2px;
  height: 12px;
  background: var(--text-primary);
  border-radius: 2px;
}

.toc-tools-strip {
  display: flex;
  gap: 0.4rem;
  margin-top: 1rem;
  padding-top: 0.85rem;
  border-top: 1px solid var(--border-color);
}

.toc-tool-btn {
  flex: 1;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  padding: 0.35rem;
  font-size: 0.76rem;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.3rem;
  transition: all 0.12s ease;
}

.toc-tool-btn:hover {
  color: var(--text-primary);
  border-color: var(--text-primary);
}

/* ==========================================================================
   7. 底栏 (Minimalist Footer)
   ========================================================================== */
.site-footer {
  border-top: 1px solid var(--border-color);
  background: var(--bg-main);
  padding: 2.5rem 1.5rem;
  margin-top: 4rem;
}

.footer-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.footer-left-brand {
  font-weight: 600;
  color: var(--text-secondary);
}

/* ==========================================================================
   8. 响应式布局 (Responsive)
   ========================================================================== */
@media (max-width: 1024px) {
  .site-main-layout {
    grid-template-columns: 1fr;
  }
  .sidebar-column {
    width: 100%;
  }
  .sticky-toc-box {
    position: static;
  }
}

@media (max-width: 768px) {
  .header-nav {
    display: none;
  }
  .mobile-nav-toggle {
    display: block;
  }
  .search-input-box {
    width: 130px;
  }
  .compact-row-item {
    grid-template-columns: 1fr;
    gap: 0.35rem;
  }
  .row-date {
    font-size: 0.75rem;
  }
  .row-meta-right {
    display: none;
  }
  .lead-title {
    font-size: 1.35rem;
  }
  .article-main-title {
    font-size: 1.6rem;
  }
}


/* ==========================================================================
   v1.1.0 前台四大高级出版色系系统 (Editorial Color Schemes)
   ========================================================================== */

/* --------------------------------------------------------------------------
   色系一：【百年报刊 · 杏暖纸白与酒红】 (editorial - 默认推荐)
   -------------------------------------------------------------------------- */
html[data-scheme="editorial"],
:root {
  --bg-main: #fbf7ee;
  --bg-surface: #f4ecdf;
  --bg-surface-elevated: #ffffff;
  --bg-hover: #ede3d3;
  --text-primary: #1c1917;
  --text-secondary: #57534e;
  --text-muted: #8c8277;
  --border-color: #e5ded2;
  --border-subtle: #eee6db;
  --accent: #881337;
  --accent-hover: #9f1239;
  --accent-light: #ffe4e6;
  --accent-border: #fecdd3;
}

/* --------------------------------------------------------------------------
   色系二：【大地矿物 · 骨瓷象牙白与赤陶】 (terracotta)
   -------------------------------------------------------------------------- */
html[data-scheme="terracotta"] {
  --bg-main: #f8f7f4;
  --bg-surface: #efece5;
  --bg-surface-elevated: #ffffff;
  --bg-hover: #e6e2da;
  --text-primary: #1c1d21;
  --text-secondary: #52525b;
  --text-muted: #71717a;
  --border-color: #e2ded6;
  --border-subtle: #eae7e0;
  --accent: #c2410c;
  --accent-hover: #ea580c;
  --accent-light: #ffedd5;
  --accent-border: #fed7aa;
}

/* --------------------------------------------------------------------------
   色系三：【青绿水墨 · 雪青白与群青靛蓝】 (indigo)
   -------------------------------------------------------------------------- */
html[data-scheme="indigo"] {
  --bg-main: #f6f8f7;
  --bg-surface: #ebf0ee;
  --bg-surface-elevated: #ffffff;
  --bg-hover: #e0e7e4;
  --text-primary: #0f172a;
  --text-secondary: #334155;
  --text-muted: #64748b;
  --border-color: #d6deda;
  --border-subtle: #e2e8e5;
  --accent: #1d4ed8;
  --accent-hover: #2563eb;
  --accent-light: #eff6ff;
  --accent-border: #bfdbfe;
}

/* --------------------------------------------------------------------------
   色系四：【黑曜暗夜 · 午夜黑曜石与琥珀】 (amber)
   -------------------------------------------------------------------------- */
html[data-scheme="amber"] {
  --bg-main: #0c1017;
  --bg-surface: #131a26;
  --bg-surface-elevated: #1a2232;
  --bg-hover: #1f293d;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --border-color: rgba(255, 255, 255, 0.09);
  --border-subtle: rgba(255, 255, 255, 0.05);
  --accent: #f59e0b;
  --accent-hover: #fbbf24;
  --accent-light: rgba(245, 158, 11, 0.15);
  --accent-border: rgba(245, 158, 11, 0.3);
}

/* ==========================================================================
   多维低饱和分类色阶胶囊 (Categorical Color Harmonics)
   ========================================================================== */
.cat-color-blue {
  background: #eff6ff !important;
  color: #1e40af !important;
  border-color: #bfdbfe !important;
}
.cat-color-red {
  background: #fef2f2 !important;
  color: #991b1b !important;
  border-color: #fecaca !important;
}
.cat-color-green {
  background: #ecfdf5 !important;
  color: #065f46 !important;
  border-color: #a7f3d0 !important;
}
.cat-color-amber {
  background: #fffbeb !important;
  color: #92400e !important;
  border-color: #fde68a !important;
}

/* 暗色系下自动沉降为半透明微发光色阶 */
html[data-scheme="amber"] .cat-color-blue {
  background: rgba(30, 64, 175, 0.22) !important;
  color: #93c5fd !important;
  border-color: rgba(147, 197, 253, 0.3) !important;
}
html[data-scheme="amber"] .cat-color-red {
  background: rgba(153, 27, 27, 0.22) !important;
  color: #fca5a5 !important;
  border-color: rgba(252, 165, 165, 0.3) !important;
}
html[data-scheme="amber"] .cat-color-green {
  background: rgba(6, 95, 70, 0.22) !important;
  color: #6ee7b7 !important;
  border-color: rgba(110, 231, 183, 0.3) !important;
}
html[data-scheme="amber"] .cat-color-amber {
  background: rgba(146, 64, 14, 0.22) !important;
  color: #fcd34d !important;
  border-color: rgba(252, 211, 77, 0.3) !important;
}

/* ==========================================================================
   前台色系即时切换控件 (Header Scheme Picker)
   ========================================================================== */
.header-scheme-picker {
  display: flex;
  align-items: center;
  gap: 0.2rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  padding: 0.18rem;
  border-radius: 6px;
}
.scheme-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.22rem 0.5rem;
  border-radius: 4px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.12s ease;
  line-height: 1;
}
.scheme-btn:hover {
  color: var(--text-primary);
  background: var(--bg-main);
}
.scheme-btn.active {
  background: var(--bg-surface-elevated);
  color: var(--text-primary);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.06);
  font-weight: 700;
}
.scheme-swatch {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  display: inline-block;
  flex-shrink: 0;
}
.swatch-editorial { background: #881337; }
.swatch-terracotta { background: #c2410c; }
.swatch-indigo { background: #1d4ed8; }
.swatch-amber { background: #f59e0b; }

@media (max-width: 900px) {
  .header-scheme-picker {
    display: none; /* 移动端在顶栏隐藏，收纳至侧边 */
  }
}