/* hust-eic-microwave · Jason DS layer 2 override：教材米色 + teal */
:root {
  --jx-paper: #f7f3ea;
  --jx-surface: #fffdf7;
  --jx-surface-sunk: #ede5d2;
  --jx-ink: #1a1a1a;
  --jx-ink-2: #2d2d2d;
  --jx-ink-muted: #6b6862;
  --jx-rule: rgba(15,118,110,0.16);
  --jx-rule-strong: rgba(15,118,110,0.32);
  --jx-accent: #0f766e;
  --jx-accent-hub: #2240d6;
}

:root {
  color-scheme: light;
  --bg: #f7f3ea;
  --paper: #fffdf7;
  --paper-strong: #fff8ea;
  --ink: #26231d;
  --muted: #70685c;
  --line: #ded3c2;
  --accent: #0f766e;
  --accent-strong: #0b5f59;
  --accent-soft: #d9eee9;
  --warn: #b45309;
  --code-bg: #f2eadb;
  --shadow: 0 18px 40px rgba(67, 52, 28, 0.10);
  --sans: "Avenir Next", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --serif: "Iowan Old Style", "Songti SC", "Noto Serif CJK SC", "Source Han Serif SC", serif;
  --mono: "SFMono-Regular", "Cascadia Mono", "Menlo", monospace;
}

[data-theme="dark"] {
  color-scheme: dark;
  --bg: #151a1c;
  --paper: #1f2628;
  --paper-strong: #273033;
  --ink: #f0eadf;
  --muted: #b9afa0;
  --line: #3b4747;
  --accent: #6ee7d8;
  --accent-strong: #a8fff4;
  --accent-soft: #173a38;
  --warn: #f7c46c;
  --code-bg: #151d20;
  --shadow: 0 18px 40px rgba(0, 0, 0, 0.25);
}

/* —— System dark follow when no localStorage —— */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    color-scheme: dark;
    --bg: #161310;
    --paper: #1d1814;
    --paper-strong: #231d18;
    --ink: #ebe2d0;
    --muted: #a39888;
    --line: rgba(235, 226, 208, 0.14);
    --accent: #3eb4a3;
    --accent-strong: #5fc9b9;
    --accent-soft: rgba(62, 180, 163, 0.20);
    --warn: #e8a04d;
    --code-bg: #251f18;
    --shadow: 0 1px 0 rgba(235,226,208,0.05), 0 12px 32px rgba(0,0,0,0.55);
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-padding-top: 88px;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    linear-gradient(90deg, rgba(15, 118, 110, 0.07) 0 1px, transparent 1px 100%),
    linear-gradient(180deg, rgba(180, 83, 9, 0.06) 0 1px, transparent 1px 100%),
    var(--bg);
  background-size: 32px 32px;
  color: var(--ink);
  font-family: var(--sans);
  line-height: 1.75;
}

.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 90;
  width: 100%;
  height: 3px;
  background: transparent;
}

.reading-progress span {
  display: block;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--warn));
  transform: scaleX(0);
  transform-origin: 0 50%;
}

a {
  color: var(--accent-strong);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--warn);
}

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 100;
  transform: translateY(-160%);
  background: var(--ink);
  color: var(--paper);
  padding: 8px 12px;
  border-radius: 6px;
}

.skip-link:focus {
  transform: translateY(0);
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 100;
  display: grid;
  grid-template-columns: auto minmax(220px, 1fr) minmax(260px, 520px) auto;
  gap: 14px;
  align-items: center;
  min-height: 72px;
  padding: 10px clamp(14px, 3vw, 34px);
  /* 为右上角固定 GitHub 角标（80×80）留出空间，避免遮挡主题切换按钮 */
  padding-right: calc(clamp(14px, 3vw, 34px) + 3.5rem);
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
  color: var(--ink);
  text-decoration: none;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border: 2px solid var(--accent);
  color: var(--accent-strong);
  font-family: var(--mono);
  font-size: 0.9rem;
  font-weight: 800;
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  overflow: hidden;
  font-size: 1.02rem;
  line-height: 1.15;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.brand small {
  margin-top: 3px;
  color: var(--muted);
  font-size: 0.75rem;
}

.icon-button {
  display: inline-grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--paper);
  color: var(--ink);
  font: 700 1.1rem/1 var(--sans);
  cursor: pointer;
}

.icon-button:hover {
  border-color: var(--accent);
  color: var(--accent-strong);
}

.menu-button {
  display: none;
}

.search-box {
  position: relative;
  min-width: 0;
}

.search-box input {
  width: 100%;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--paper);
  color: var(--ink);
  font: 0.95rem/1 var(--sans);
  padding: 0 14px 0 42px;
  outline: none;
}

.search-box input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.search-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  color: var(--muted);
  transform: translateY(-50%);
}

.search-results {
  position: fixed;
  top: 76px;
  right: clamp(12px, 3vw, 34px);
  z-index: 60;
  width: min(720px, calc(100vw - 24px));
  max-height: min(70vh, 680px);
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
  box-shadow: var(--shadow);
}

.search-result {
  display: block;
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
  color: var(--ink);
  text-decoration: none;
}

.search-result:hover,
.search-result.active {
  background: color-mix(in srgb, var(--accent-soft) 62%, transparent);
}

.search-result:last-child {
  border-bottom: 0;
}

.search-result strong {
  display: block;
  line-height: 1.35;
}

.search-result small,
.search-result span {
  display: block;
  color: var(--muted);
  font-size: 0.8rem;
}

.search-result small b {
  display: inline-block;
  margin-right: 0.5rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0 0.45rem;
  color: var(--accent-strong);
  font-size: 0.72rem;
}

.search-status {
  position: sticky;
  top: 0;
  z-index: 1;
  border-bottom: 1px solid var(--line);
  background: var(--paper-strong);
  padding: 9px 14px;
  color: var(--muted);
  font-size: 0.82rem;
}

.shell {
  display: grid;
  grid-template-columns: minmax(240px, 300px) minmax(0, 1fr) minmax(190px, 250px);
  gap: clamp(18px, 3vw, 34px);
  width: min(1560px, 100%);
  margin: 0 auto;
  padding: clamp(16px, 3vw, 34px);
}

.sidebar,
.toc-panel {
  position: sticky;
  top: 96px;
  align-self: start;
  max-height: calc(100vh - 118px);
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: color-mix(in srgb, var(--paper) 92%, transparent);
  box-shadow: 0 10px 24px rgba(67, 52, 28, 0.06);
}

.sidebar {
  padding: 14px;
}

.sidebar-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.sidebar-head .icon-button {
  display: none;
}

.nav-root-link {
  display: block;
  margin: 2px 0 8px;
  padding: 8px;
  border-radius: 5px;
  color: var(--ink);
  font-size: 0.92rem;
  font-weight: 800;
  text-decoration: none;
}

.nav-root-link:hover,
.nav-root-link.active {
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.nav-group {
  border-top: 1px solid var(--line);
  padding: 7px 0;
}

.nav-group summary {
  cursor: pointer;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.04em;
}

.nav-list {
  list-style: none;
  margin: 8px 0 0;
  padding: 0;
}

.nav-list .nav-list {
  margin-top: 4px;
  padding-left: 10px;
  border-left: 1px solid var(--line);
}

.nav-subgroup {
  margin: 2px 0;
}

.nav-subgroup summary {
  display: flex;
  align-items: center;
  min-height: 32px;
  padding: 4px 6px;
  border-radius: 5px;
  color: var(--muted);
  cursor: pointer;
  font-size: 0.88rem;
  font-weight: 750;
  line-height: 1.35;
  letter-spacing: 0;
}

.nav-subgroup summary:hover {
  background: color-mix(in srgb, var(--accent-soft) 55%, transparent);
  color: var(--accent-strong);
}

.nav-summary-link {
  color: inherit;
  text-decoration: none;
}

.nav-summary-link.active {
  color: var(--accent-strong);
}

.nav-subgroup.depth-1 summary {
  font-size: 0.84rem;
  font-weight: 700;
}

.nav-item a {
  display: block;
  padding: 7px 8px;
  border-radius: 5px;
  color: var(--ink);
  font-size: 0.9rem;
  line-height: 1.35;
  text-decoration: none;
}

.nav-item a:hover,
.nav-item.active a {
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.content {
  min-width: 0;
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 14px;
  color: var(--muted);
  font-size: 0.84rem;
}

.page-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 14px;
}

.page-meta span {
  border: 1px solid var(--line);
  border-radius: 999px;
  background: color-mix(in srgb, var(--paper) 86%, var(--accent-soft));
  padding: 0.15rem 0.6rem;
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.7;
}

.crumb::after {
  content: "/";
  margin-left: 8px;
  color: var(--line);
}

.article {
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
  box-shadow: var(--shadow);
  padding: clamp(22px, 4vw, 58px);
}

.article h1,
.article h2,
.article h3,
.article h4 {
  color: var(--ink);
  font-family: var(--serif);
  line-height: 1.25;
}

.article h1 {
  margin: 0 0 1.2rem;
  font-size: clamp(2rem, 4vw, 3.4rem);
  letter-spacing: 0;
}

.article h2 {
  margin-top: 2.3rem;
  padding-top: 0.9rem;
  border-top: 2px solid var(--line);
  font-size: clamp(1.35rem, 2.2vw, 2rem);
}

.article h3 {
  margin-top: 1.75rem;
  font-size: clamp(1.08rem, 1.4vw, 1.34rem);
}

.article p,
.article li,
.article td,
.article th {
  font-size: clamp(1rem, 1vw, 1.06rem);
}

.article p,
.article ul,
.article ol,
.article blockquote,
.article table,
.article pre {
  margin-top: 1rem;
  margin-bottom: 1rem;
}

.article blockquote {
  margin-left: 0;
  border-left: 4px solid var(--accent);
  padding: 0.4rem 1rem;
  background: var(--accent-soft);
  color: var(--ink);
}

.article blockquote p:first-child {
  margin-top: 0.2rem;
}

.article blockquote p:last-child {
  margin-bottom: 0.2rem;
}

.article code {
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--code-bg);
  padding: 0.12em 0.32em;
  font-family: var(--mono);
  font-size: 0.9em;
}

.article pre {
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--code-bg);
  padding: 1rem;
}

.article pre code {
  border: 0;
  background: transparent;
  padding: 0;
}

.article table {
  display: block;
  width: 100%;
  overflow-x: auto;
  border-collapse: collapse;
}

.article th,
.article td {
  border: 1px solid var(--line);
  padding: 0.55rem 0.72rem;
  vertical-align: top;
}

.article th {
  background: var(--paper-strong);
  text-align: left;
}

.article img {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 1.2rem auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
}

.article hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 2rem 0;
}

.article .toclink {
  margin-left: 0.35em;
  color: var(--muted);
  font-family: var(--sans);
  font-size: 0.75em;
  text-decoration: none;
}

.article mjx-container[display="true"] {
  max-width: 100%;
  overflow-x: auto;
  overflow-y: hidden;
  padding: 0.35rem 0;
}

.article mjx-container[jax="CHTML"] {
  line-height: 1.35;
}

.mermaid {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper-strong);
  padding: 1rem;
}

.pager {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-top: 20px;
}

.pager-link {
  min-height: 84px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
  padding: 14px;
  color: var(--ink);
  text-decoration: none;
}

.pager-link span {
  display: block;
  color: var(--muted);
  font-size: 0.78rem;
}

.pager-link strong {
  display: block;
  margin-top: 5px;
  line-height: 1.35;
}

.pager-link.next {
  text-align: right;
}

.pager-link.disabled {
  visibility: hidden;
}

.toc-panel {
  padding: 16px;
}

.toc-panel strong {
  display: block;
  margin-bottom: 10px;
}

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

.toc-panel li {
  margin: 0.45rem 0;
  line-height: 1.35;
}

.toc-panel li li {
  padding-left: 0.8rem;
}

.toc-panel a {
  color: var(--muted);
  font-size: 0.88rem;
  text-decoration: none;
}

.toc-panel a:hover {
  color: var(--accent-strong);
}

.toc-empty {
  color: var(--muted);
  font-size: 0.88rem;
}

.formula-quick-toolbar {
  margin: 0 0 18px;
}

.formula-quick-toggle {
  appearance: none;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--accent-soft);
  color: var(--accent-strong);
  cursor: pointer;
  font: inherit;
  font-size: 0.88rem;
  font-weight: 750;
  padding: 8px 14px;
  transition: background 150ms ease, border-color 150ms ease;
}

.formula-quick-toggle:hover {
  border-color: var(--accent-strong);
  background: color-mix(in srgb, var(--accent-soft) 70%, var(--paper-strong));
}

.formula-quick-toggle[aria-pressed="true"] {
  background: var(--accent-strong);
  border-color: var(--accent-strong);
  color: var(--paper);
}

.formula-quick-grid {
  display: none;
  gap: 14px;
  grid-template-columns: 1fr;
  margin-bottom: 18px;
}

.formula-quick-grid:not([hidden]) {
  display: grid;
}

body.formula-quick-active .article-body {
  display: none;
}

.formula-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: color-mix(in srgb, var(--paper) 92%, transparent);
  box-shadow: 0 8px 20px rgba(67, 52, 28, 0.05);
  padding: 14px 16px;
}

.formula-card h3 {
  font-size: 1rem;
  margin: 0 0 8px;
}

.formula-card p {
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.45;
  margin: 0 0 10px;
}

.formula-card mjx-container {
  overflow-x: auto;
}

@media (min-width: 840px) {
  .formula-quick-grid:not([hidden]) {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

body.sidebar-open {
  overflow: hidden;
}

.sidebar-source-note {
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.5;
}

.sidebar-source-note a {
  color: var(--accent-strong);
}

.shell.layout-home,
.shell.layout-hub {
  grid-template-columns: minmax(240px, 300px) minmax(0, 1fr);
}

.home-dashboard {
  display: grid;
  gap: clamp(22px, 3vw, 34px);
}

.home-hero {
  padding: clamp(22px, 4vw, 36px);
  border: 1px solid var(--line);
  border-radius: 12px;
  background:
    radial-gradient(circle at top right, color-mix(in srgb, var(--jx-accent, var(--accent)) 12%, transparent), transparent 55%),
    linear-gradient(180deg, var(--paper-strong), var(--paper));
  box-shadow: var(--shadow);
}

.home-kicker {
  margin: 0 0 8px;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.home-hero h1 {
  margin: 0 0 10px;
  font-family: var(--serif);
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  line-height: 1.15;
}

.home-lead {
  margin: 0 0 18px;
  max-width: 46rem;
  color: var(--muted);
  font-size: 1.02rem;
}

.home-cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.home-cta {
  display: inline-flex;
  align-items: center;
  padding: 10px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--paper);
  color: var(--ink);
  font-size: 0.92rem;
  font-weight: 700;
  text-decoration: none;
}

.home-cta:hover {
  border-color: var(--accent);
  color: var(--accent-strong);
}

.home-cta-primary {
  border-color: color-mix(in srgb, var(--jx-accent, var(--accent)) 35%, var(--line));
  background: color-mix(in srgb, var(--accent-soft) 70%, var(--paper));
  color: var(--accent-strong);
}

.learning-section {
  padding: clamp(16px, 2.5vw, 22px);
  border: 1px solid var(--line);
  border-radius: 10px;
  background: color-mix(in srgb, var(--paper) 94%, transparent);
}

.learning-section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

.learning-section-head h2 {
  margin: 0;
  font-family: var(--serif);
  font-size: 1.25rem;
}

.learning-section-head a {
  color: var(--muted);
  font-size: 0.86rem;
  text-decoration: none;
  white-space: nowrap;
}

.learning-section-head a:hover {
  color: var(--accent-strong);
}

.home-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 12px;
}

.card-link {
  display: grid;
  gap: 6px;
  padding: 14px 15px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
  color: inherit;
  text-decoration: none;
  transition: border-color 120ms ease, transform 120ms ease, box-shadow 120ms ease;
}

.card-link:hover {
  border-color: color-mix(in srgb, var(--jx-accent, var(--accent)) 45%, var(--line));
  box-shadow: 0 8px 18px rgba(67, 52, 28, 0.08);
  transform: translateY(-1px);
}

.card-link strong {
  color: var(--ink);
  font-size: 0.95rem;
}

.card-link span {
  color: var(--muted);
  font-size: 0.84rem;
  line-height: 1.45;
}

.learning-section-split {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 18px;
}

.home-strategy-list {
  margin: 0;
  padding-left: 1.2rem;
  color: var(--ink);
}

.home-strategy-list li + li {
  margin-top: 8px;
}

.home-strategy-foot {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 0.9rem;
}

@media (max-width: 1180px) {
  .shell {
    grid-template-columns: minmax(220px, 280px) minmax(0, 1fr);
  }

  .toc-panel {
    display: none;
  }
}

@media (max-width: 840px) {
  .topbar {
    grid-template-columns: auto minmax(0, 1fr) auto;
    padding-right: calc(clamp(14px, 3vw, 34px) + 2.75rem);
  }

  .menu-button {
    display: inline-grid;
  }

  .brand small {
    display: none;
  }

  .search-box {
    grid-column: 1 / -1;
    grid-row: 2;
  }

  .shell {
    display: block;
    padding: 14px;
  }

  .sidebar {
    position: fixed;
    inset: 0 auto 0 0;
    z-index: 80;
    width: min(86vw, 360px);
    max-height: 100vh;
    border-radius: 0;
    transform: translateX(-105%);
    transition: transform 180ms ease;
  }

  body.sidebar-open .sidebar {
    transform: translateX(0);
  }

  .sidebar-head .icon-button {
    display: inline-grid;
  }

  .article {
    padding: 20px;
  }

  .page-meta {
    gap: 6px;
  }

  .page-meta span {
    max-width: 100%;
    overflow-wrap: anywhere;
  }

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

  .pager-link.next {
    text-align: left;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition: none !important;
    scroll-behavior: auto !important;
  }
}

/* —— Editorial Monocle 默认值 + return-to-hub —— */
:root {
  --return-hub-color: var(--muted, #6b6862);
  --return-hub-hover: var(--accent-strong, #c4452d);
}
.return-to-hub {
  font-family: var(--mono, "JetBrains Mono", Menlo, monospace);
  font-size: 0.875rem;
  color: var(--muted);
  text-decoration: none;
  letter-spacing: 0.05em;
  text-transform: lowercase;
  border-bottom: 1px solid transparent;
  transition: border-color 0.15s, color 0.15s;
  margin-right: 1rem;
  white-space: nowrap;
}
.return-to-hub:hover {
  color: var(--accent-strong);
  border-bottom-color: var(--accent-strong);
}

@media print {
  body {
    background: #fff;
    color: #111;
  }

  .topbar,
  .sidebar,
  .toc-panel,
  .formula-quick-toolbar,
  .formula-quick-grid,
  .breadcrumbs,
  .page-meta,
  .pager,
  .search-results,
  .reading-progress,
  .skip-link {
    display: none !important;
  }

  .shell {
    display: block;
    width: 100%;
    padding: 0;
  }

  .article {
    border: 0;
    box-shadow: none;
    padding: 0;
  }

  body.formula-quick-active .article-body {
    display: block !important;
  }

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

  .article h2,
  .article h3 {
    break-after: avoid;
  }

  .article table,
  .article img,
  .article pre {
    break-inside: avoid;
  }
}