:root {
  color-scheme: light dark;
  --paper: #f4f0e6;
  --paper-deep: #e9e2d3;
  --paper-soft: #faf7ef;
  --ink: #242823;
  --ink-soft: #5f655e;
  --line: #cbc4b5;
  --line-strong: #9eaa9f;
  --celadon: #6f8f7d;
  --celadon-deep: #3f6453;
  --celadon-wash: #dce6dd;
  --seal: #a94c3d;
  --shadow: 0 18px 50px rgb(54 60 51 / 8%);
  --serif: "Noto Serif CJK SC", "Source Han Serif SC", "Songti SC", SimSun, Georgia, serif;
  --sans: "Noto Sans CJK SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
}

* {
  box-sizing: border-box;
}

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

body {
  min-width: 280px;
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 12% 8%, rgb(255 255 255 / 46%), transparent 28rem),
    radial-gradient(circle at 91% 33%, rgb(111 143 125 / 9%), transparent 24rem),
    repeating-linear-gradient(0deg, transparent 0 5px, rgb(50 55 48 / 1.3%) 6px),
    var(--paper);
  font-family: var(--serif);
  font-size: 17px;
  line-height: 1.8;
  text-rendering: optimizeLegibility;
}

a {
  color: var(--celadon-deep);
  text-decoration-color: color-mix(in srgb, currentColor 42%, transparent);
  text-underline-offset: 0.22em;
  text-decoration-thickness: 0.08em;
}

a:hover {
  text-decoration-color: currentColor;
}

a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--celadon);
  outline-offset: 4px;
  border-radius: 2px;
}

.skip-link {
  position: fixed;
  z-index: 20;
  inset: 0 auto auto 1rem;
  padding: 0.65rem 1rem;
  color: var(--paper-soft);
  background: var(--ink);
  font-family: var(--sans);
  font-size: 0.85rem;
  transform: translateY(-140%);
}

.skip-link:focus {
  transform: translateY(1rem);
}

.site-shell {
  width: min(1120px, calc(100% - 48px));
  margin-inline: auto;
}

.masthead {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 1.25rem;
  min-height: 94px;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--ink);
  font-family: var(--sans);
  font-weight: 650;
  letter-spacing: 0.08em;
  text-decoration: none;
}

.seal {
  display: grid;
  width: 34px;
  aspect-ratio: 1;
  place-items: center;
  border: 1px solid color-mix(in srgb, var(--seal) 72%, var(--paper));
  color: var(--paper-soft);
  background: var(--seal);
  box-shadow: inset 0 0 0 3px rgb(255 255 255 / 13%);
  font-family: var(--serif);
  font-size: 0.88rem;
  line-height: 1;
}

.edition {
  justify-self: center;
  color: var(--ink-soft);
  font-family: var(--sans);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 1.2rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--sans);
  font-size: 0.78rem;
}

.nav-list a {
  color: var(--ink-soft);
  text-decoration: none;
}

.nav-list a:hover {
  color: var(--ink);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.28fr) minmax(280px, 0.72fr);
  gap: clamp(2rem, 7vw, 6.5rem);
  align-items: end;
  padding: clamp(4.5rem, 10vw, 8.5rem) 0 clamp(4rem, 8vw, 7rem);
}

.kicker,
.section-index,
.meta,
.label {
  font-family: var(--sans);
  font-size: 0.7rem;
  font-weight: 650;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.kicker,
.section-index,
.label {
  color: var(--celadon-deep);
}

.hero h1 {
  max-width: 9em;
  margin: 0.35rem 0 1.2rem;
  font-size: clamp(3.6rem, 9vw, 7.6rem);
  font-weight: 540;
  letter-spacing: -0.055em;
  line-height: 0.98;
}

.hero .dek {
  max-width: 34em;
  margin: 0;
  color: var(--ink-soft);
  font-size: clamp(1.06rem, 2vw, 1.3rem);
  line-height: 1.85;
}

.hero-aside {
  padding: 1.6rem 0 0 1.6rem;
  border-top: 1px solid var(--line-strong);
  border-left: 1px solid var(--line-strong);
}

.hero-aside p {
  margin: 0.7rem 0 0;
  font-size: 0.95rem;
}

.hero-aside .quiet {
  color: var(--ink-soft);
  font-size: 0.8rem;
}

.rule {
  width: 100%;
  height: 1px;
  margin: 0;
  border: 0;
  background: linear-gradient(90deg, var(--celadon), var(--line) 38%, transparent);
}

.featured {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
  min-height: 430px;
  margin-bottom: clamp(5rem, 10vw, 9rem);
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--paper-soft) 86%, transparent);
  box-shadow: var(--shadow);
}

.visual-panel {
  position: relative;
  display: grid;
  min-height: 350px;
  overflow: hidden;
  place-items: center;
  border-right: 1px solid var(--line);
  background:
    linear-gradient(145deg, transparent 0 52%, rgb(255 255 255 / 18%) 52% 53%, transparent 53%),
    var(--celadon-wash);
}

.visual-panel::before,
.visual-panel::after {
  position: absolute;
  content: "";
  border: 1px solid color-mix(in srgb, var(--celadon-deep) 45%, transparent);
  border-radius: 50%;
}

.visual-panel::before {
  width: min(72%, 320px);
  aspect-ratio: 1;
}

.visual-panel::after {
  width: min(45%, 190px);
  aspect-ratio: 1;
}

.visual-glyph {
  position: relative;
  z-index: 1;
  max-width: 8em;
  margin: 0;
  color: var(--celadon-deep);
  font-size: clamp(1.55rem, 4vw, 2.8rem);
  letter-spacing: 0.12em;
  line-height: 1.35;
  text-align: center;
}

.featured-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(2rem, 6vw, 5rem);
}

.featured-copy h2 {
  max-width: 13em;
  margin: 0.5rem 0 1.2rem;
  font-size: clamp(2rem, 4vw, 3.3rem);
  font-weight: 520;
  line-height: 1.2;
}

.featured-copy p {
  margin: 0;
  color: var(--ink-soft);
}

.text-link {
  align-self: flex-start;
  margin-top: 1.6rem;
  font-family: var(--sans);
  font-size: 0.78rem;
  font-weight: 650;
  letter-spacing: 0.08em;
}

.section {
  padding-bottom: clamp(5rem, 10vw, 8rem);
  scroll-margin-top: 2rem;
}

.section-heading {
  display: grid;
  grid-template-columns: 5rem minmax(0, 1fr) minmax(220px, 0.5fr);
  gap: 1.5rem;
  align-items: start;
  margin-bottom: 2.4rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--line);
}

.section-heading h2 {
  margin: 0;
  font-size: clamp(1.75rem, 4vw, 2.65rem);
  font-weight: 520;
  line-height: 1.25;
}

.section-heading p {
  margin: 0.35rem 0 0;
  color: var(--ink-soft);
  font-size: 0.9rem;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.card {
  position: relative;
  min-height: 260px;
  padding: 1.7rem;
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--paper-soft) 72%, transparent);
}

.card::before {
  position: absolute;
  inset: -1px auto auto -1px;
  width: 42px;
  height: 3px;
  content: "";
  background: var(--celadon);
}

.card h3 {
  margin: 1.4rem 0 0.75rem;
  font-size: 1.35rem;
  font-weight: 560;
}

.card p,
.card li {
  color: var(--ink-soft);
  font-size: 0.92rem;
}

.card p {
  margin: 0;
}

.card ul {
  margin: 0;
  padding-left: 1.15rem;
}

.split-notes {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(1.5rem, 5vw, 4.5rem);
}

.note {
  padding: 0 0 1.8rem;
  border-bottom: 1px solid var(--line);
}

.note h3 {
  margin: 0.35rem 0 0.75rem;
  font-size: 1.45rem;
  font-weight: 540;
}

.note p {
  margin: 0;
  color: var(--ink-soft);
}

.timeline {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: steps;
}

.timeline li {
  display: grid;
  grid-template-columns: 5rem minmax(0, 1fr);
  gap: 1.5rem;
  padding: 1.4rem 0;
  border-top: 1px solid var(--line);
  counter-increment: steps;
}

.timeline li::before {
  color: var(--celadon-deep);
  content: "0" counter(steps);
  font-family: var(--sans);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.timeline h3 {
  margin: 0 0 0.4rem;
  font-size: 1.18rem;
  font-weight: 570;
}

.timeline p {
  max-width: 46em;
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.92rem;
}

.pullquote {
  margin: 0 0 clamp(5rem, 10vw, 8rem);
  padding: clamp(2.5rem, 7vw, 5.5rem) clamp(1rem, 8vw, 7rem);
  border-block: 1px solid var(--line-strong);
  color: var(--celadon-deep);
  font-size: clamp(1.7rem, 4vw, 3rem);
  line-height: 1.45;
  text-align: center;
}

.pullquote cite {
  display: block;
  margin-top: 1rem;
  color: var(--ink-soft);
  font-family: var(--sans);
  font-size: 0.72rem;
  font-style: normal;
  letter-spacing: 0.12em;
}

.sources {
  display: grid;
  grid-template-columns: 0.65fr 1.35fr;
  gap: clamp(2rem, 7vw, 6rem);
  padding: clamp(2rem, 5vw, 4rem);
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--celadon-wash) 42%, transparent);
}

.sources h2 {
  margin: 0;
  font-size: 1.65rem;
  font-weight: 530;
}

.source-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.source-list li + li {
  margin-top: 1.4rem;
  padding-top: 1.4rem;
  border-top: 1px solid var(--line);
}

.source-list a {
  font-weight: 600;
}

.source-list p {
  margin: 0.35rem 0 0;
  color: var(--ink-soft);
  font-size: 0.86rem;
}

.external::after {
  margin-left: 0.35em;
  content: "↗";
  font-family: var(--sans);
  font-size: 0.78em;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 2rem;
  margin-top: clamp(4rem, 9vw, 8rem);
  padding: 2rem 0 3rem;
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
  font-family: var(--sans);
  font-size: 0.72rem;
  letter-spacing: 0.05em;
}

.site-footer p {
  margin: 0;
}

@media (max-width: 860px) {
  .masthead {
    grid-template-columns: 1fr auto;
  }

  .edition {
    display: none;
  }

  .hero,
  .featured,
  .sources {
    grid-template-columns: 1fr;
  }

  .hero {
    align-items: start;
  }

  .hero-aside {
    max-width: 34rem;
  }

  .visual-panel {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .section-heading {
    grid-template-columns: 4rem 1fr;
  }

  .section-heading p {
    grid-column: 2;
  }

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

@media (max-width: 620px) {
  body {
    font-size: 16px;
  }

  .site-shell {
    width: min(100% - 28px, 1120px);
  }

  .masthead {
    display: flex;
    min-height: auto;
    padding: 1rem 0;
    flex-wrap: wrap;
  }

  .nav-list {
    width: 100%;
    gap: 0.9rem;
    overflow-x: auto;
    padding-top: 0.7rem;
    border-top: 1px solid var(--line);
    white-space: nowrap;
  }

  .hero {
    gap: 2.5rem;
    padding-top: 4rem;
  }

  .hero h1 {
    font-size: clamp(3.2rem, 18vw, 5.2rem);
  }

  .featured-copy {
    padding: 1.75rem;
  }

  .section-heading {
    grid-template-columns: 1fr;
    gap: 0.4rem;
  }

  .section-heading p {
    grid-column: auto;
  }

  .card-grid,
  .split-notes {
    grid-template-columns: 1fr;
  }

  .card {
    min-height: auto;
  }

  .timeline li {
    grid-template-columns: 3rem 1fr;
    gap: 0.5rem;
  }

  .sources {
    padding: 1.5rem;
  }

  .site-footer {
    display: block;
  }

  .site-footer p + p {
    margin-top: 0.5rem;
  }
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #1d211e;
    --paper-deep: #171a18;
    --paper-soft: #242925;
    --ink: #e8e3d8;
    --ink-soft: #b5b8af;
    --line: #414840;
    --line-strong: #68776c;
    --celadon: #8eb09c;
    --celadon-deep: #b2cfbd;
    --celadon-wash: #29372f;
    --seal: #bd6554;
    --shadow: 0 18px 50px rgb(0 0 0 / 22%);
  }

  body {
    background:
      radial-gradient(circle at 12% 8%, rgb(255 255 255 / 3%), transparent 28rem),
      radial-gradient(circle at 91% 33%, rgb(142 176 156 / 7%), transparent 24rem),
      repeating-linear-gradient(0deg, transparent 0 5px, rgb(255 255 255 / 1.2%) 6px),
      var(--paper);
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

@media print {
  :root {
    color-scheme: light;
  }

  body {
    background: #fff;
  }

  .nav-list,
  .skip-link {
    display: none;
  }

  .featured,
  .card,
  .sources {
    box-shadow: none;
    break-inside: avoid;
  }
}