:root {
  --page: #ffffff;
  --ink: #262625;
  --muted: #6d6762;
  --line: #c9beb6;
  --line-strong: #9f9188;
  --accent: #c92c21;
  --accent-dark: #9d1e17;
  --shell: min(1360px, calc(100% - 96px));
  color-scheme: light;
  font-family: "Songti SC", "STSong", "SimSun", serif;
  font-synthesis: none;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  background: var(--page);
  color: var(--ink);
  font-size: 18px;
  line-height: 1.8;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

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

a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 5px;
}

.shell {
  width: var(--shell);
  margin-inline: auto;
}

.site-header {
  height: 88px;
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  height: 100%;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 18px;
  font-size: 29px;
  font-weight: 700;
  letter-spacing: 0.14em;
}

.brand-seal,
.board-seal {
  display: grid;
  place-items: center;
  color: var(--accent);
  border: 2px solid currentColor;
  box-shadow: inset 0 0 0 3px var(--page), inset 0 0 0 4px currentColor;
  font-weight: 700;
  line-height: 1;
}

.brand-seal {
  width: 43px;
  height: 43px;
  font-size: 22px;
  letter-spacing: 0;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(28px, 4vw, 58px);
  font-size: 19px;
  letter-spacing: 0.08em;
}

.site-nav a {
  position: relative;
  padding: 28px 2px 23px;
}

.site-nav a::after {
  position: absolute;
  right: 0;
  bottom: 14px;
  left: 0;
  height: 2px;
  background: var(--accent);
  content: "";
  opacity: 0;
  transform: scaleX(0.35);
  transition: opacity 160ms ease, transform 160ms ease;
}

.site-nav a:hover,
.site-nav a.active {
  color: var(--accent);
}

.site-nav a:hover::after,
.site-nav a.active::after {
  opacity: 1;
  transform: scaleX(1);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(500px, 0.96fr);
  gap: clamp(56px, 7vw, 112px);
  align-items: center;
  min-height: 520px;
  padding-block: 32px 18px;
}

.hero-copy {
  padding-left: 30px;
}

.hero h1 {
  max-width: 680px;
  margin: 0;
  font-size: clamp(48px, 3.8vw, 60px);
  font-weight: 700;
  line-height: 1.22;
  letter-spacing: 0.035em;
}

.title-rule,
.section-rule {
  display: block;
  background: var(--accent);
}

.title-rule {
  width: 74px;
  height: 4px;
  margin: 34px 0 26px;
}

.hero p {
  max-width: 650px;
  margin: 0;
  color: #403d3a;
  font-size: clamp(19px, 1.65vw, 25px);
  line-height: 1.9;
  letter-spacing: 0.075em;
}

.text-action {
  display: inline-flex;
  margin-top: 31px;
  padding: 11px 39px 10px;
  color: var(--accent);
  border: 2px solid var(--accent);
  font-size: 22px;
  letter-spacing: 0.14em;
  transition: color 160ms ease, background 160ms ease;
}

.text-action:hover {
  color: #fff;
  background: var(--accent);
}

.board-art {
  position: relative;
  width: 100%;
  max-width: 650px;
  justify-self: end;
}

.board-art svg {
  display: block;
  width: 100%;
  height: auto;
}

.board-lines,
.river-labels path,
.move-line,
.corner-marks {
  fill: none;
  stroke: var(--line-strong);
  stroke-linecap: square;
  stroke-linejoin: miter;
}

.board-lines {
  stroke-width: 1.25;
}

.river-labels {
  fill: var(--line-strong);
  font-size: 25px;
  letter-spacing: 0.18em;
}

.river-labels path {
  stroke-width: 1;
}

.move-line {
  stroke-width: 2.3;
}

.move-line circle {
  fill: var(--page);
  stroke-width: 2;
}

.move-marker {
  fill: var(--accent);
  stroke: var(--accent);
}

.move-marker circle:first-child {
  fill: var(--page);
  stroke-width: 2;
}

.move-marker circle:last-child {
  fill: var(--accent);
  stroke: none;
}

.corner-marks {
  stroke-width: 1.5;
}

.board-seal {
  position: absolute;
  right: 23px;
  bottom: 23px;
  width: 48px;
  height: 48px;
  background: var(--page);
  font-size: 25px;
}

.river-divider {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 22px;
  align-items: center;
  color: var(--line-strong);
  font-size: 17px;
  font-weight: 400;
  letter-spacing: 0.22em;
}

.river-divider span {
  height: 1px;
  background: var(--line);
}

.project-section {
  display: grid;
  grid-template-columns: 1fr 0.86fr;
  gap: 0;
  padding: 30px 30px 26px;
}

.project-copy {
  padding-right: 72px;
}

.principles {
  padding-left: clamp(58px, 7vw, 108px);
  border-left: 1px solid var(--line);
}

.project-section h2 {
  margin: 0;
  font-size: 30px;
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: 0.08em;
}

.section-rule {
  width: 70px;
  height: 3px;
  margin: 18px 0 18px;
}

.project-section p {
  max-width: 680px;
  margin: 0;
  color: #484440;
  font-size: 18px;
  line-height: 2;
  letter-spacing: 0.065em;
}

.principles ul {
  display: grid;
  gap: 4px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 20px;
  letter-spacing: 0.08em;
}

.principles li {
  position: relative;
  padding-left: 36px;
}

.principles li::before {
  position: absolute;
  top: 50%;
  left: 0;
  width: 13px;
  height: 13px;
  border: 2px solid var(--accent);
  border-radius: 50%;
  content: "";
  transform: translateY(-50%);
}

.contact-line {
  display: flex;
  align-items: center;
  gap: 15px;
  min-height: 68px;
  padding-inline: 30px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  font-size: 18px;
  letter-spacing: 0.05em;
}

.contact-line svg {
  width: 24px;
  height: 24px;
  fill: none;
  stroke: var(--accent);
  stroke-width: 1.5;
}

.contact-line a:hover,
.site-footer a:hover,
.policy-content a:hover,
.back-link:hover {
  color: var(--accent);
}

.site-footer {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  min-height: 76px;
  padding-inline: 30px;
  font-size: 16px;
  letter-spacing: 0.05em;
}

.site-footer .filing-placeholder {
  color: var(--muted);
}

.site-footer a {
  justify-self: end;
  border-bottom: 2px solid var(--accent);
}

.policy-page {
  max-width: 920px;
  padding-block: 70px 90px;
}

.policy-heading {
  padding-bottom: 32px;
  border-bottom: 1px solid var(--line);
}

.policy-heading h1 {
  margin: 0 0 10px;
  font-size: clamp(42px, 5vw, 62px);
  line-height: 1.2;
  letter-spacing: 0.1em;
}

.policy-heading p {
  margin: 0;
  color: var(--muted);
  font-size: 16px;
}

.policy-content {
  padding-block: 14px 22px;
}

.policy-content section {
  padding-block: 18px;
}

.policy-content h2 {
  margin: 0 0 8px;
  font-size: 23px;
  letter-spacing: 0.06em;
}

.policy-content p {
  margin: 0;
  color: #484440;
  font-size: 17px;
  line-height: 2;
}

.policy-content a,
.back-link {
  color: var(--accent-dark);
  border-bottom: 1px solid currentColor;
}

.back-link {
  display: inline-flex;
  margin-top: 14px;
}

@media (max-width: 980px) {
  :root {
    --shell: min(100% - 48px, 820px);
  }

  .hero {
    grid-template-columns: 1fr;
    gap: 30px;
    padding-top: 62px;
  }

  .hero-copy {
    padding-left: 0;
  }

  .board-art {
    width: min(100%, 680px);
    justify-self: center;
  }

  .project-section {
    padding-inline: 0;
  }

  .project-copy {
    padding-right: 44px;
  }

  .principles {
    padding-left: 44px;
  }

  .contact-line,
  .site-footer {
    padding-inline: 0;
  }
}

@media (max-width: 680px) {
  :root {
    --shell: calc(100% - 36px);
  }

  body {
    font-size: 16px;
  }

  .site-header {
    height: auto;
  }

  .header-inner {
    align-items: flex-start;
    padding-block: 16px 12px;
  }

  .brand {
    gap: 10px;
    font-size: 20px;
    letter-spacing: 0.08em;
  }

  .brand-seal {
    width: 34px;
    height: 34px;
    font-size: 18px;
  }

  .site-nav {
    gap: 14px;
    font-size: 14px;
    letter-spacing: 0.02em;
  }

  .site-nav a {
    padding: 5px 0 14px;
  }

  .site-nav a::after {
    bottom: 7px;
  }

  .hero {
    min-height: 0;
    padding-top: 52px;
  }

  .hero h1 {
    font-size: clamp(37px, 11vw, 51px);
    letter-spacing: 0.03em;
  }

  .title-rule {
    margin: 27px 0 20px;
  }

  .hero p {
    font-size: 17px;
    line-height: 1.85;
    letter-spacing: 0.04em;
  }

  .text-action {
    margin-top: 25px;
    padding: 8px 28px;
    font-size: 18px;
  }

  .board-seal {
    right: 13px;
    bottom: 13px;
    width: 38px;
    height: 38px;
    font-size: 20px;
  }

  .river-divider {
    margin-top: 12px;
    gap: 11px;
    font-size: 12px;
  }

  .project-section {
    grid-template-columns: 1fr;
    gap: 31px;
    padding-block: 34px 31px;
  }

  .project-copy {
    padding-right: 0;
  }

  .principles {
    padding: 30px 0 0;
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .project-section h2 {
    font-size: 25px;
  }

  .project-section p {
    font-size: 16px;
    line-height: 1.9;
  }

  .principles ul {
    font-size: 18px;
  }

  .contact-line {
    min-height: 64px;
    font-size: 15px;
  }

  .site-footer {
    grid-template-columns: 1fr auto;
    gap: 10px 20px;
    padding-block: 20px;
    font-size: 14px;
  }

  .site-footer .filing-placeholder {
    grid-column: 1 / -1;
    grid-row: 2;
  }

  .policy-page {
    padding-block: 50px 70px;
  }

  .policy-heading h1 {
    font-size: 40px;
  }
}

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

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
  }
}