:root {
  --ink: #20221f;
  --pine: #173f3a;
  --pine-soft: #285a52;
  --brick: #c64d3b;
  --brick-dark: #9f382c;
  --paper: #f6f3ed;
  --paper-deep: #ece6dc;
  --white: #fffdf8;
  --line: #d8d3c9;
  --muted: #716f69;
  --warm: #e7ddcf;
  --chapter: #d6ddd2;
  --gold: #b38a47;
  --shadow-1: 0 8px 24px rgba(32, 34, 31, 0.07);
  --shadow-2: 0 18px 50px rgba(23, 63, 58, 0.14);
  --serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", SimSun, serif;
  --sans: "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background: var(--paper);
}

body {
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(rgba(32, 34, 31, 0.025) 1px, transparent 1px),
    var(--paper);
  background-size: 100% 36px;
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.72;
  letter-spacing: 0;
  text-wrap: pretty;
}

button,
input,
select {
  font: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

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

button {
  color: inherit;
}

:focus-visible {
  outline: 3px solid rgba(198, 77, 59, 0.35);
  outline-offset: 3px;
}

.app-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 288px minmax(0, 1fr);
}

.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  padding: 34px 28px 26px;
  color: #f5f0e6;
  background: var(--pine);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  z-index: 20;
}

.brand-mark {
  width: 46px;
  height: 46px;
  margin-bottom: 22px;
  border: 1px solid rgba(255, 255, 255, 0.48);
  display: grid;
  place-items: center;
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 700;
}

.brand-name {
  margin: 0;
  font-family: var(--serif);
  font-size: 22px;
  line-height: 1.4;
  font-weight: 700;
}

.brand-note {
  margin: 7px 0 0;
  color: rgba(255, 255, 255, 0.62);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.sidebar-rule {
  height: 1px;
  margin: 26px 0 22px;
  background: rgba(255, 255, 255, 0.16);
}

.side-label {
  margin: 0 0 10px;
  color: rgba(255, 255, 255, 0.44);
  font-size: 11px;
  letter-spacing: 0.16em;
}

.side-nav {
  display: grid;
  gap: 4px;
}

.side-nav a {
  min-height: 42px;
  padding: 8px 10px;
  border-left: 2px solid transparent;
  color: rgba(255, 255, 255, 0.72);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: 14px;
  transition: 180ms var(--ease);
}

.side-nav a:hover,
.side-nav a[aria-current="page"] {
  color: #fff;
  border-left-color: var(--brick);
  background: rgba(255, 255, 255, 0.06);
  transform: translateX(2px);
}

.side-nav .nav-no {
  color: rgba(255, 255, 255, 0.38);
  font-family: Georgia, serif;
  font-size: 12px;
}

.side-progress {
  margin-top: auto;
  padding-top: 26px;
}

.progress-copy {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.62);
}

.progress-copy strong {
  color: #fff;
  font-family: Georgia, serif;
  font-size: 23px;
  font-weight: 400;
}

.progress-track {
  height: 3px;
  margin-top: 10px;
  background: rgba(255, 255, 255, 0.14);
}

.progress-bar {
  width: 0;
  height: 100%;
  background: var(--brick);
  transition: width 450ms var(--ease);
}

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

.topline {
  min-height: 58px;
  padding: 0 5vw;
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.08em;
}

.top-actions {
  display: flex;
  gap: 8px;
}

.text-button,
.solid-button,
.ghost-button {
  min-height: 42px;
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 9px 14px;
  cursor: pointer;
  transition: 180ms var(--ease);
}

.text-button,
.ghost-button {
  background: transparent;
}

.text-button:hover,
.ghost-button:hover {
  border-color: var(--pine);
  color: var(--pine);
  background: rgba(23, 63, 58, 0.05);
}

.solid-button {
  color: #fff;
  border-color: var(--pine);
  background: var(--pine);
}

.solid-button:hover {
  border-color: var(--pine-soft);
  background: var(--pine-soft);
  transform: translateY(-1px);
  box-shadow: var(--shadow-1);
}

.hero {
  min-height: 430px;
  padding: 72px 5vw 54px;
  border-bottom: 1px solid var(--line);
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(280px, 0.75fr);
  gap: 7vw;
  align-items: end;
  background:
    linear-gradient(90deg, transparent 0 74%, rgba(23, 63, 58, 0.04) 74% 100%);
}

.eyebrow {
  margin: 0 0 18px;
  color: var(--brick);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.16em;
}

.hero h1,
.detail-hero h1 {
  max-width: 820px;
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(42px, 5.2vw, 78px);
  line-height: 1.12;
  letter-spacing: 0;
  font-weight: 700;
}

.hero-lead {
  max-width: 720px;
  margin: 24px 0 0;
  color: #52534f;
  font-size: clamp(16px, 1.45vw, 20px);
}

.hero-stats {
  border-top: 2px solid var(--pine);
}

.stat-row {
  min-height: 82px;
  padding: 16px 2px;
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.stat-row span {
  color: var(--muted);
  font-size: 13px;
}

.stat-row strong {
  color: var(--pine);
  font-family: Georgia, serif;
  font-size: 34px;
  line-height: 1;
  font-weight: 400;
}

.content-wrap {
  width: min(1240px, calc(100% - 10vw));
  margin: 0 auto;
  padding: 72px 0 110px;
}

.section-heading {
  margin-bottom: 34px;
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 28px;
}

.section-kicker {
  margin: 0 0 8px;
  color: var(--brick);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.15em;
}

.section-heading h2,
.content-section h2 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(28px, 3vw, 42px);
  line-height: 1.24;
  letter-spacing: 0;
}

.section-intro {
  max-width: 550px;
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.route-map {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.route-stage {
  min-height: 230px;
  padding: 28px 26px 30px;
  border-right: 1px solid var(--line);
  position: relative;
}

.route-stage:last-child {
  border-right: 0;
}

.route-index {
  color: var(--brick);
  font-family: Georgia, serif;
  font-size: 13px;
}

.route-stage h3 {
  margin: 32px 0 10px;
  font-family: var(--serif);
  font-size: 24px;
  line-height: 1.3;
}

.route-stage p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.route-lessons {
  margin-top: 18px;
  color: var(--pine);
  font-size: 12px;
  font-weight: 700;
}

.tool-row {
  margin: 72px 0 26px;
  display: grid;
  grid-template-columns: minmax(240px, 1fr) auto;
  gap: 16px;
}

.search-box {
  min-height: 50px;
  border: 1px solid var(--line);
  background: rgba(255, 253, 248, 0.58);
  display: flex;
  align-items: center;
}

.search-box label {
  padding-left: 16px;
  color: var(--brick);
  font-family: Georgia, serif;
  font-size: 18px;
}

.search-box input {
  width: 100%;
  min-width: 0;
  border: 0;
  outline: 0;
  padding: 13px 16px 13px 10px;
  color: var(--ink);
  background: transparent;
}

.filter-group {
  display: flex;
  gap: 6px;
}

.filter-button {
  min-height: 50px;
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 4px;
  color: var(--muted);
  background: transparent;
  cursor: pointer;
  transition: 160ms var(--ease);
}

.filter-button:hover,
.filter-button.is-active {
  color: #fff;
  border-color: var(--pine);
  background: var(--pine);
}

.course-list {
  border-top: 2px solid var(--ink);
}

.course-item {
  display: grid;
  grid-template-columns: 82px minmax(0, 1.2fr) minmax(220px, 0.8fr) 42px;
  gap: 24px;
  align-items: center;
  min-height: 146px;
  padding: 24px 10px 24px 0;
  border-bottom: 1px solid var(--line);
  transition: 220ms var(--ease);
}

.course-item:hover {
  padding-left: 12px;
  background: rgba(255, 253, 248, 0.72);
}

.course-no {
  color: var(--brick);
  font-family: Georgia, serif;
  font-size: 28px;
}

.course-main h3 {
  margin: 0 0 9px;
  font-family: var(--serif);
  font-size: clamp(22px, 2vw, 29px);
  line-height: 1.3;
}

.course-main p,
.course-trigger {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.course-meta {
  margin-top: 11px;
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}

.tag {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 4px 9px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: #5e5d58;
  background: transparent;
  font-size: 11px;
}

.course-arrow {
  width: 38px;
  height: 38px;
  border: 1px solid var(--line);
  border-radius: 50%;
  display: grid;
  place-items: center;
  color: var(--pine);
  transition: 200ms var(--ease);
}

.course-item:hover .course-arrow {
  color: #fff;
  border-color: var(--brick);
  background: var(--brick);
  transform: translateX(3px);
}

.empty-state {
  display: none;
  padding: 54px 0;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  text-align: center;
}

.method-table {
  margin-top: 84px;
}

.method-grid {
  display: grid;
  grid-template-columns: 150px repeat(4, minmax(140px, 1fr));
  border-top: 2px solid var(--pine);
  border-left: 1px solid var(--line);
  font-family: "Noto Serif SC", "Source Han Serif SC", "Songti SC", SimSun, serif;
}

.method-cell {
  min-height: 88px;
  padding: 16px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: rgba(255, 253, 248, 0.45);
  font-size: 16px;
  line-height: 1.75;
}

.method-cell.head {
  min-height: 54px;
  color: #fff;
  background: var(--pine);
  font-size: 17px;
  font-weight: 700;
}

.method-cell.row-head {
  color: var(--pine);
  background: var(--chapter);
  font-size: 16px;
  font-weight: 700;
}

.footer {
  padding: 30px 5vw;
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  gap: 24px;
  color: var(--muted);
  font-size: 12px;
}

/* Detail page */
.detail-layout {
  min-height: 100vh;
  background: var(--paper);
}

.detail-header {
  min-height: 64px;
  padding: 0 5vw;
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.detail-header a {
  color: var(--pine);
  font-weight: 700;
}

.site-credit {
  color: var(--muted);
  font-family: var(--serif);
  font-size: 13px;
}

.detail-hero {
  padding: 68px 5vw 54px;
  color: #f8f4ea;
  background: var(--pine);
  position: relative;
  overflow: hidden;
}

.detail-hero::after {
  content: attr(data-number);
  position: absolute;
  right: 4vw;
  bottom: -62px;
  color: rgba(255, 255, 255, 0.07);
  font-family: Georgia, serif;
  font-size: clamp(180px, 25vw, 360px);
  line-height: 1;
}

.detail-hero .eyebrow {
  color: #efaa9f;
}

.detail-hero h1 {
  position: relative;
  z-index: 1;
  font-size: clamp(40px, 5vw, 72px);
}

.detail-subtitle {
  max-width: 740px;
  margin: 20px 0 0;
  color: rgba(255, 255, 255, 0.72);
  font-size: 18px;
  position: relative;
  z-index: 1;
}

.detail-tags {
  margin-top: 28px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  position: relative;
  z-index: 1;
}

.detail-tags .tag {
  color: rgba(255, 255, 255, 0.78);
  border-color: rgba(255, 255, 255, 0.22);
}

.detail-grid {
  width: min(1240px, calc(100% - 10vw));
  margin: 0 auto;
  padding: 62px 0 100px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 6vw;
}

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

.content-section {
  padding: 0 0 50px;
  margin-bottom: 50px;
  border-bottom: 1px solid var(--line);
}

.content-section:last-child {
  margin-bottom: 0;
}

.content-section h2 {
  margin-bottom: 26px;
  font-size: 30px;
}

.essence-box {
  padding: 28px 30px;
  border-top: 2px solid var(--brick);
  border-bottom: 1px solid var(--line);
  background: var(--white);
}

.essence-label {
  color: var(--brick);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.14em;
}

.essence-box p {
  margin: 12px 0 0;
  font-family: var(--serif);
  font-size: 22px;
  line-height: 1.65;
}

.signal-grid,
.knowledge-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.signal-card,
.knowledge-card {
  min-height: 130px;
  padding: 22px 24px;
  background: var(--white);
}

.signal-card span,
.knowledge-card span {
  color: var(--brick);
  font-family: Georgia, serif;
  font-size: 13px;
}

.signal-card h3,
.knowledge-card h3 {
  margin: 12px 0 6px;
  font-family: var(--serif);
  font-size: 19px;
}

.signal-card p,
.knowledge-card p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.step-list,
.plain-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.step-item {
  padding: 20px 0;
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 18px;
}

.step-item:last-child {
  border-bottom: 1px solid var(--line);
}

.step-no {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  color: #fff;
  background: var(--pine);
  display: grid;
  place-items: center;
  font-family: Georgia, serif;
  font-size: 13px;
}

.step-item h3 {
  margin: 0 0 5px;
  font-size: 17px;
}

.step-item p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.conclusion-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.conclusion-item {
  min-height: 76px;
  padding: 17px 18px;
  border: 1px solid var(--line);
  background: rgba(255, 253, 248, 0.52);
  font-size: 14px;
}

.teach-flow {
  display: grid;
  gap: 0;
  position: relative;
}

.teach-flow::before {
  content: "";
  position: absolute;
  left: 21px;
  top: 24px;
  bottom: 24px;
  width: 1px;
  background: var(--line);
}

.timeline-note {
  max-width: 680px;
  margin: -12px 0 28px;
  color: var(--muted);
  font-size: 14px;
}

.teach-row {
  min-height: 116px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
  display: grid;
  grid-template-columns: 44px 150px minmax(0, 1fr);
  gap: 20px;
  align-items: center;
}

.timeline-marker {
  width: 44px;
  height: 44px;
  border: 1px solid var(--pine);
  border-radius: 50%;
  color: #fff;
  background: var(--pine);
  display: grid;
  place-items: center;
  font-family: Georgia, serif;
  font-size: 12px;
  position: relative;
  z-index: 1;
}

.timeline-stage {
  display: grid;
  gap: 4px;
}

.timeline-stage strong {
  color: var(--pine);
  font-family: var(--serif);
  font-size: 18px;
}

.timeline-stage small {
  color: var(--muted);
  font-size: 11px;
  line-height: 1.5;
}

.teach-row > span {
  color: #4f504c;
  font-size: 14px;
}

.mistake-list li,
.review-list li {
  padding: 15px 0 15px 28px;
  border-bottom: 1px solid var(--line);
  position: relative;
}

.mistake-list li::before,
.review-list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 25px;
  width: 8px;
  height: 8px;
  background: var(--brick);
  transform: rotate(45deg);
}

.detail-aside {
  align-self: start;
  position: sticky;
  top: 24px;
}

.aside-panel {
  padding: 24px;
  border: 1px solid var(--line);
  background: var(--white);
  box-shadow: var(--shadow-1);
}

.aside-panel + .aside-panel {
  margin-top: 16px;
}

.aside-panel h3 {
  margin: 0 0 16px;
  font-family: var(--serif);
  font-size: 19px;
}

.aside-panel p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.toc {
  display: grid;
  gap: 5px;
}

.toc a {
  min-height: 38px;
  padding: 7px 9px;
  color: var(--muted);
  font-size: 13px;
}

.toc a:hover {
  color: var(--pine);
  background: var(--chapter);
}

.complete-button {
  width: 100%;
  margin-top: 18px;
}

.complete-button.is-complete {
  color: var(--pine);
  border-color: var(--pine);
  background: var(--chapter);
}

.lesson-nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--line);
}

.lesson-nav a {
  min-height: 128px;
  padding: 24px 5vw;
  display: flex;
  flex-direction: column;
  justify-content: center;
  transition: 180ms var(--ease);
}

.lesson-nav a + a {
  border-left: 1px solid var(--line);
  text-align: right;
}

.lesson-nav a:hover {
  background: var(--white);
}

.lesson-nav span {
  color: var(--muted);
  font-size: 11px;
  letter-spacing: 0.12em;
}

.lesson-nav strong {
  margin-top: 8px;
  color: var(--pine);
  font-family: var(--serif);
  font-size: 19px;
}

.mobile-menu {
  display: none;
}

@media (max-width: 980px) {
  .app-shell {
    display: block;
  }

  .sidebar {
    position: static;
    width: 100%;
    height: auto;
    padding: 22px 5vw;
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto;
    align-items: center;
    gap: 16px;
  }

  .brand-mark {
    width: 40px;
    height: 40px;
    margin: 0;
  }

  .brand-name {
    font-size: 18px;
  }

  .brand-note,
  .sidebar-rule,
  .side-label,
  .side-nav,
  .side-progress {
    display: none;
  }

  .mobile-menu {
    display: inline-flex;
    border: 1px solid rgba(255, 255, 255, 0.35);
    padding: 7px 10px;
    color: #fff;
    background: transparent;
    cursor: pointer;
  }

  .sidebar.is-open .side-nav {
    grid-column: 1 / -1;
    display: grid;
    padding-top: 12px;
  }

  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    padding-top: 58px;
    background: transparent;
  }

  .hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
  }

  .stat-row {
    min-height: 72px;
    border-right: 1px solid var(--line);
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    gap: 4px;
  }

  .route-map {
    grid-template-columns: 1fr;
  }

  .route-stage {
    min-height: auto;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .route-stage:last-child {
    border-bottom: 0;
  }

  .tool-row {
    grid-template-columns: 1fr;
  }

  .course-item {
    grid-template-columns: 60px minmax(0, 1fr) 42px;
  }

  .course-trigger {
    grid-column: 2 / 3;
  }

  .course-arrow {
    grid-column: 3;
    grid-row: 1 / 3;
  }

  .method-grid {
    grid-template-columns: 112px repeat(4, minmax(130px, 1fr));
    overflow-x: auto;
  }

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

  .detail-aside {
    position: static;
    grid-row: 1;
  }

  .toc {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  body {
    font-size: 15px;
  }

  .topline {
    padding: 10px 5vw;
    align-items: flex-start;
    flex-direction: column;
  }

  .detail-header {
    padding: 12px 5vw;
    flex-wrap: wrap;
  }

  .site-credit {
    width: 100%;
    order: 3;
    font-size: 12px;
  }

  .hero {
    padding-bottom: 40px;
  }

  .hero h1,
  .detail-hero h1 {
    font-size: 40px;
  }

  .hero-stats {
    grid-template-columns: 1fr;
  }

  .stat-row {
    border-right: 0;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }

  .content-wrap,
  .detail-grid {
    width: min(100% - 10vw, 1240px);
    padding-top: 48px;
  }

  .section-heading {
    align-items: flex-start;
    flex-direction: column;
  }

  .filter-group {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
  }

  .filter-button {
    min-height: 44px;
  }

  .course-item {
    grid-template-columns: 46px minmax(0, 1fr);
    gap: 12px;
    padding-right: 0;
  }

  .course-trigger {
    grid-column: 2;
  }

  .course-arrow {
    display: none;
  }

  .signal-grid,
  .knowledge-grid,
  .conclusion-list {
    grid-template-columns: 1fr;
  }

  .teach-row {
    grid-template-columns: 44px minmax(0, 1fr);
    gap: 12px 16px;
  }

  .teach-row > span {
    grid-column: 2;
  }

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

  .lesson-nav {
    grid-template-columns: 1fr;
  }

  .lesson-nav a + a {
    border-left: 0;
    border-top: 1px solid var(--line);
    text-align: left;
  }

  .footer {
    flex-direction: column;
  }
}

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

@media print {
  body {
    background: #fff;
    font-size: 11pt;
  }

  .sidebar,
  .topline,
  .detail-header,
  .detail-aside,
  .lesson-nav,
  .footer,
  .tool-row {
    display: none !important;
  }

  .app-shell,
  .detail-grid {
    display: block;
  }

  .hero,
  .detail-hero {
    min-height: auto;
    padding: 18mm 15mm 12mm;
    color: var(--ink);
    background: #fff;
    border-bottom: 2px solid var(--pine);
  }

  .detail-hero::after {
    display: none;
  }

  .detail-hero .eyebrow,
  .detail-subtitle {
    color: var(--ink);
  }

  .detail-grid,
  .content-wrap {
    width: auto;
    margin: 0 15mm;
    padding: 12mm 0;
  }

  .content-section,
  .signal-card,
  .knowledge-card,
  .essence-box {
    break-inside: avoid;
  }
}