:root {
  --color-surface: #fefefe;
  --color-surface-alt: #f4f4f4;
  --color-surface-deep: #e6e6e6;
  --color-ink: #393233;
  --color-ink-soft: #685e60;
  --color-ink-muted: #857a7c;
  --color-line: #dbd9d9;
  --color-primary: #e91632;
  --color-primary-ink: #ffffff;
  --color-primary-soft: #fbdee1;
  --color-accent: #ce3146;
  --color-accent-ink: #ffffff;
  --color-highlight: #f5d9dd;
  --color-focus: #db243d;
  --color-contrast-surface: #291316;
  --color-contrast-ink: #e7e4e5;
  --color-contrast-line: #534144;
  --color-contrast-accent: #d75667;
  --overlay-scrim: linear-gradient(180deg, rgba(41, 19, 22, 0.35) 0%, rgba(41, 19, 22, 0.72) 55%, rgba(41, 19, 22, 0.92) 100%);
  --font-heading: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  --font-body: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --text-xs: 9.5px;
  --text-sm: 13.5px;
  --text-base: 16px;
  --text-lg: 22.6px;
  --text-xl: 32.0px;
  --text-2xl: 45.2px;
  --text-3xl: 64.0px;
  --text-4xl: 90.4px;
  --text-display: clamp(51px, 10.4vw, 133px);
  --text-figure: clamp(42px, 7.5vw, 96px);
  --weight-heading: 876;
  --weight-body: 400;
  --leading-body: 1.65;
  --leading-heading: 1.21;
  --tracking-heading: -0.02em;
  --radius-sm: 0px;
  --radius-md: 0px;
  --radius-lg: 0px;
  --radius-pill: 0px;
  --border-thin: 1px;
  --border-thick: 2px;
  --shadow-1: none;
  --shadow-2: none;
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-6: 48px;
  --space-8: 64px;
  --container: 1140px;
  --measure: 71ch;
  --gutter: 16px;
  --section-y: 84px;
  --section-y-lg: 118px;
}

*, *::before, *::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--color-surface);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: var(--weight-body);
  line-height: var(--leading-body);
  word-break: break-word;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  text-wrap: balance;
}

p {
  margin: 0 0 var(--space-2);
  text-wrap: pretty;
}

ul, ol {
  margin: 0;
  padding: 0;
}

li {
  list-style: none;
}

img, picture, svg, video {
  display: block;
  max-width: 100%;
}

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
}

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

::selection {
  background: var(--color-primary);
  color: var(--color-primary-ink);
}

:focus-visible {
  outline: var(--border-thick) solid var(--color-focus);
  outline-offset: var(--space-1);
}

.skip-link {
  position: absolute;
  top: 0;
  left: var(--space-2);
  z-index: 100;
  transform: translateY(-200%);
  padding: var(--space-2) var(--space-3);
  background: var(--color-primary);
  color: var(--color-primary-ink);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.04em;
  transition: transform 0.16s ease;
}

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

.container {
  width: min(calc(100% - var(--space-4)), var(--container));
  margin-inline: auto;
}

.masthead {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--color-surface);
  border-bottom: var(--border-thin) solid var(--color-line);
}

.masthead__inner {
  position: relative;
  width: min(calc(100% - var(--space-4)), var(--container));
  margin-inline: auto;
}

.masthead__top {
  position: relative;
  padding: var(--space-6) 0 var(--space-3);
  text-align: center;
}

.masthead__brand {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-1);
}

.brand-mark {
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
}

.brand-kicker {
  color: var(--color-ink-muted);
  font-size: var(--text-sm);
  letter-spacing: 0.12em;
}

.nav-toggle {
  display: none;
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  align-items: center;
  justify-content: center;
  gap: 3px;
  padding: var(--space-1);
  color: var(--color-ink);
  background: var(--color-surface);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-sm);
}

.nav-toggle__bar {
  display: block;
  width: 18px;
  height: var(--border-thin);
  background: currentColor;
}

.nav-toggle__label {
  font-size: var(--text-xs);
  line-height: 1;
  letter-spacing: 0.12em;
}

.masthead__row {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--gutter);
  align-items: center;
  padding: 0 0 var(--space-2);
}

.masthead__cta {
  grid-column: 1 / span 3;
  justify-self: start;
  display: inline-flex;
  align-items: center;
  min-height: var(--space-4);
  padding: 0 var(--space-2);
  background: var(--color-primary);
  color: var(--color-primary-ink);
  border: var(--border-thin) solid var(--color-primary);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.04em;
  transition: background-color 0.16s ease, border-color 0.16s ease, color 0.16s ease;
}

.masthead__cta:hover {
  background: color-mix(in srgb, var(--color-primary) 82%, var(--color-contrast-surface));
  border-color: color-mix(in srgb, var(--color-primary) 82%, var(--color-contrast-surface));
  color: var(--color-primary-ink);
}

.nav {
  grid-column: 4 / span 9;
}

.nav__list {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  align-items: center;
}

.nav__item {
  min-width: 0;
}

.nav__link {
  position: relative;
  display: block;
  padding: var(--space-2) 0;
  text-align: center;
  color: var(--color-ink-soft);
  font-size: var(--text-sm);
  font-weight: 600;
  transition: color 0.16s ease;
}

.nav__link:hover {
  color: var(--color-primary);
}

.nav__link[aria-current="page"] {
  color: var(--color-primary);
}

.nav__link[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 25%;
  right: 25%;
  bottom: calc(-1 * var(--border-thin));
  height: var(--border-thick);
  background: var(--color-primary);
}

.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: calc(-1 * var(--border-thin));
  height: var(--border-thick);
  background: transparent;
  pointer-events: none;
}

.scroll-progress__bar {
  display: block;
  width: 100%;
  height: 100%;
  background: var(--color-primary);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.12s linear;
}

.section {
  padding: var(--section-y) 0;
  border-top: var(--border-thin) solid var(--color-line);
}

.section--lg {
  padding: var(--section-y-lg) 0;
}

.section--contrast {
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  border-top-color: var(--color-contrast-line);
}

.rule {
  width: 100%;
  height: 0;
  border: 0;
  border-top: var(--border-thin) solid var(--color-line);
  margin: var(--space-6) 0;
}

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--gutter);
}

.col-4 {
  grid-column: span 4;
}

.col-6 {
  grid-column: span 6;
}

.col-8 {
  grid-column: span 8;
}

.col-12 {
  grid-column: span 12;
}

.eyebrow {
  color: var(--color-ink-muted);
  font-size: var(--text-sm);
  line-height: 1.4;
  letter-spacing: 0.14em;
}

.display-title {
  font-family: var(--font-heading);
  font-size: var(--text-display);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
}

.figure {
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  font-weight: var(--weight-heading);
  line-height: 1;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}

.lede {
  max-width: var(--measure);
  color: var(--color-ink-soft);
  font-size: var(--text-lg);
  line-height: var(--leading-body);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  min-height: var(--space-4);
  padding: var(--space-1) var(--space-3);
  border: var(--border-thin) solid currentColor;
  border-radius: var(--radius-sm);
  color: var(--color-ink);
  background: transparent;
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.04em;
  transition: background-color 0.16s ease, color 0.16s ease, border-color 0.16s ease;
}

.btn--primary {
  background: var(--color-primary);
  color: var(--color-primary-ink);
  border-color: var(--color-primary);
}

.btn--primary:hover {
  background: color-mix(in srgb, var(--color-primary) 82%, var(--color-contrast-surface));
  border-color: color-mix(in srgb, var(--color-primary) 82%, var(--color-contrast-surface));
}

.btn--ghost {
  color: var(--color-ink);
  border-color: var(--color-line);
  background: var(--color-surface);
}

.btn--ghost:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.tag {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-2);
  background: var(--color-primary-soft);
  color: var(--color-primary);
  border: var(--border-thin) solid var(--color-primary-soft);
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  line-height: 1.2;
  letter-spacing: 0.08em;
}

.tag--accent {
  background: var(--color-accent);
  color: var(--color-accent-ink);
  border-color: var(--color-accent);
}

.mark {
  background-image: linear-gradient(to bottom, transparent 62%, var(--color-highlight) 62%);
  background-repeat: no-repeat;
  background-size: 100% 100%;
}

.mark--primary {
  border-bottom: var(--border-thick) solid var(--color-primary);
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  padding: var(--space-2) 0;
  border-bottom: var(--border-thin) solid var(--color-line);
  color: var(--color-ink-muted);
  font-size: var(--text-sm);
}

.breadcrumbs a {
  color: var(--color-ink-soft);
}

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

.prose {
  max-width: var(--measure);
  color: var(--color-ink);
  font-size: var(--text-base);
}

.prose h2 {
  margin: var(--space-6) 0 var(--space-2);
  font-size: var(--text-2xl);
}

.prose h3 {
  margin: var(--space-4) 0 var(--space-2);
  font-size: var(--text-xl);
}

.prose p {
  margin: 0 0 var(--space-3);
}

.prose a {
  color: var(--color-primary);
  border-bottom: var(--border-thin) solid var(--color-primary);
}

.prose ul, .prose ol {
  margin: 0 0 var(--space-3);
  padding-left: var(--space-4);
}

.prose li {
  margin-bottom: var(--space-1);
  list-style: disc;
}

.prose ol li {
  list-style: decimal;
}

.prose blockquote {
  margin: var(--space-4) 0;
  padding-left: var(--space-3);
  border-left: var(--border-thick) solid var(--color-primary);
  color: var(--color-ink-soft);
}

.prose hr {
  height: 0;
  border: 0;
  border-top: var(--border-thin) solid var(--color-line);
  margin: var(--space-6) 0;
}

.frame-media {
  position: relative;
  overflow: hidden;
  background: var(--color-surface-deep);
  border: var(--border-thin) solid var(--color-line);
}

.frame-media__img {
  width: 100%;
  height: 100%;
  min-height: 220px;
  object-fit: cover;
  filter: saturate(0.72) contrast(1.02) brightness(0.93);
}

.frame-media__scrim {
  position: absolute;
  inset: 0;
  background: var(--overlay-scrim);
  pointer-events: none;
}

.frame-media__caption {
  position: absolute;
  left: var(--space-2);
  right: var(--space-2);
  bottom: var(--space-2);
  z-index: 1;
  color: var(--color-primary-ink);
  font-size: var(--text-sm);
  line-height: 1.5;
}

.frame-media--tall .frame-media__img {
  min-height: 420px;
}

.frame-media--wide .frame-media__img {
  min-height: 280px;
}

.panel {
  padding: var(--space-4);
  background: var(--color-surface);
  border: var(--border-thin) solid var(--color-line);
}

.panel--inset {
  background: var(--color-surface-alt);
}

.panel--contrast {
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  border-color: var(--color-contrast-line);
}

.stat {
  display: grid;
  gap: var(--space-1);
  padding-left: var(--space-2);
  border-left: var(--border-thick) solid var(--color-primary);
}

.stat__value {
  font-family: var(--font-mono);
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
}

.stat__label {
  color: var(--color-ink-muted);
  font-size: var(--text-sm);
}

.split {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--gutter);
}

.split--matchup > * {
  padding-top: var(--space-2);
  border-top: var(--border-thin) solid var(--color-line);
}

.list-rule {
  border-top: var(--border-thin) solid var(--color-line);
}

.list-rule__item {
  padding: var(--space-2) 0;
  border-bottom: var(--border-thin) solid var(--color-line);
}

.timeline {
  padding-left: var(--space-3);
  border-left: var(--border-thin) solid var(--color-line);
}

.timeline__item {
  position: relative;
  padding: 0 0 var(--space-4) 0;
}

.timeline__item::before {
  content: "";
  position: absolute;
  left: calc(-1 * var(--space-3));
  top: calc(var(--space-1) / 2);
  width: var(--space-1);
  height: var(--space-1);
  background: var(--color-primary);
}

.timeline__time {
  color: var(--color-ink-muted);
  font-size: var(--text-sm);
  font-variant-numeric: tabular-nums;
}

.timeline__score {
  font-family: var(--font-mono);
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  font-variant-numeric: tabular-nums;
}

.site-footer {
  padding: var(--section-y) 0 var(--space-4);
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  border-top: var(--border-thin) solid var(--color-contrast-line);
}

.footer__inner {
  width: min(calc(100% - var(--space-4)), var(--container));
  margin-inline: auto;
}

.footer__brand {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: var(--border-thin) solid var(--color-contrast-line);
}

.footer__brand .brand-mark {
  color: var(--color-contrast-ink);
  font-size: var(--text-xl);
}

.footer__tag {
  color: color-mix(in srgb, var(--color-contrast-ink) 68%, transparent);
  font-size: var(--text-sm);
}

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

.footer-panel {
  padding: var(--space-4);
  background: color-mix(in srgb, var(--color-contrast-surface) 92%, var(--color-primary) 8%);
  border: var(--border-thin) solid var(--color-contrast-line);
}

.footer-panel__title {
  margin-bottom: var(--space-2);
  color: var(--color-contrast-ink);
  font-size: var(--text-lg);
}

.footer-list__item + .footer-list__item {
  border-top: var(--border-thin) solid var(--color-contrast-line);
}

.footer-list__link {
  display: block;
  padding: var(--space-1) 0;
  color: var(--color-contrast-ink);
  font-size: var(--text-sm);
  transition: color 0.16s ease;
}

.footer-list__link:hover {
  color: var(--color-contrast-accent);
}

.footer-contact {
  display: grid;
  gap: 0;
}

.footer-contact__row {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: var(--space-2);
  margin: 0;
  padding: var(--space-1) 0;
  border-bottom: var(--border-thin) solid var(--color-contrast-line);
  font-size: var(--text-sm);
}

.footer-contact__label {
  color: var(--color-contrast-accent);
}

.footer-contact__value {
  color: var(--color-contrast-ink);
  overflow-wrap: anywhere;
}

.footer-note {
  margin: var(--space-2) 0;
  color: color-mix(in srgb, var(--color-contrast-ink) 68%, transparent);
  font-size: var(--text-sm);
}

.footer__legal {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-2);
  margin-top: var(--space-6);
  padding-top: var(--space-2);
  border-top: var(--border-thin) solid var(--color-contrast-line);
  color: color-mix(in srgb, var(--color-contrast-ink) 70%, transparent);
  font-size: var(--text-sm);
  font-variant-numeric: tabular-nums;
}

@media (max-width: 1024px) {
  .footer__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .footer-panel:last-child {
    grid-column: 1 / -1;
  }
}

@media (max-width: 860px) {
  .masthead__top {
    padding: var(--space-4) 0 var(--space-2);
  }

  .brand-mark {
    font-size: var(--text-xl);
  }

  .nav-toggle {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
  }

  .nav-toggle[aria-expanded="true"] {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-primary-ink);
  }

  .masthead__row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) 0;
  }

  .masthead__cta {
    order: 1;
  }

  .nav {
    order: 3;
    flex-basis: 100%;
    display: none;
    grid-column: auto;
    margin-top: var(--space-2);
    padding-top: var(--space-2);
    border-top: var(--border-thin) solid var(--color-line);
  }

  .nav[data-open="true"] {
    display: block;
  }

  .nav__list {
    display: block;
  }

  .nav__item + .nav__item {
    border-top: var(--border-thin) solid var(--color-line);
  }

  .nav__link {
    padding: var(--space-2) 0;
    text-align: left;
  }

  .nav__link[aria-current="page"]::after {
    left: 0;
    right: auto;
    bottom: 0;
    width: var(--space-4);
    height: var(--border-thick);
  }

  .section {
    padding: var(--space-8) 0;
  }

  .section--lg {
    padding: var(--space-8) 0;
  }

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

  .site-footer {
    padding: var(--space-8) 0 var(--space-4);
  }
}

@media (max-width: 700px) {
  .footer__grid {
    grid-template-columns: 1fr;
  }

  .footer-panel:last-child {
    grid-column: auto;
  }

  .footer__brand {
    display: block;
  }

  .footer__tag {
    display: block;
    margin-top: var(--space-1);
  }
}

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

  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

  .skip-link,
  .masthead__cta,
  .nav__link,
  .btn,
  .footer-list__link,
  .scroll-progress__bar {
    transition: none;
  }
}