/* Plan A — Civic Monument. Tokens in tokens.css; this file is layout and chrome. */

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
}

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

  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}

html[data-lang="en"] .i18n-zh,
html:not([data-lang="en"]) .i18n-en {
  display: none !important;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--pff-ink);
  color: var(--pff-paper);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: inherit;
}

button,
.lang-switch,
.nav-toggle {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
  touch-action: manipulation;
}

.skip-link {
  position: absolute;
  left: max(0.75rem, env(safe-area-inset-left));
  top: -3rem;
  z-index: var(--z-skip);
  padding: 0.55rem 0.85rem;
  background: var(--pff-brand);
  color: var(--pff-on-brand);
}

.skip-link:focus {
  top: 0.75rem;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

#main:focus {
  outline: none;
}

.back-to-top {
  position: fixed;
  z-index: var(--z-header);
  right: max(1.15rem, env(safe-area-inset-right));
  bottom: max(1.15rem, env(safe-area-inset-bottom));
  display: grid;
  place-items: center;
  width: var(--touch-min);
  height: 3.35rem;
  padding: 0;
  border: 0;
  border-top: var(--brand-rule) solid var(--pff-brand);
  background: rgba(18, 16, 12, 0.88);
  color: var(--pff-brand);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(0.7rem);
  transition: opacity var(--duration) var(--ease-out), transform var(--duration) var(--ease-out),
    visibility var(--duration), background-color var(--duration) var(--ease-out);
}

@supports (color: color-mix(in srgb, black 50%, transparent)) {
  .back-to-top {
    background: color-mix(in srgb, var(--pff-ink) 88%, transparent);
  }
}

body.is-back-to-top .back-to-top {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: none;
}

body.is-nav-open .back-to-top {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.back-to-top:hover,
.back-to-top:focus-visible {
  background: var(--pff-ink);
}

.back-to-top-mark {
  width: 0.85rem;
  height: 1.15rem;
  display: block;
  transition: transform var(--duration) var(--ease-out);
}

.back-to-top:hover .back-to-top-mark,
.back-to-top:focus-visible .back-to-top-mark {
  transform: translateY(-2px);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  height: var(--nav-height);
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0 max(var(--page-pad), env(safe-area-inset-right)) 0 max(var(--page-pad), env(safe-area-inset-left));
  background: var(--pff-ink);
  border-top: var(--brand-rule) solid var(--pff-brand);
  border-bottom: var(--hairline) solid var(--pff-rule-faint);
}

body.is-scrolled .site-header {
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.35);
}

.site-header nav {
  flex: 1 1 auto;
  display: flex;
  justify-content: center;
  min-width: 0;
}

.logo img {
  height: 1.65rem;
  width: auto;
  max-width: min(11rem, 42vw);
  object-fit: contain;
  object-position: left center;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: clamp(0.65rem, 1.5vw, 1.7rem);
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  text-decoration: none;
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  padding: 0.45rem 0.1rem;
  display: inline-flex;
  min-height: var(--touch-min);
  align-items: center;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--pff-brand);
}

.header-tools {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}

.lang-switch {
  display: inline-flex;
  border: var(--hairline) solid var(--pff-line);
}

.lang-switch button {
  min-width: var(--touch-min);
  min-height: var(--touch-min);
  padding: 0.35rem 0.55rem;
}

html[data-lang="zh"] .lang-switch [data-set-lang="zh"],
html[data-lang="en"] .lang-switch [data-set-lang="en"] {
  background: var(--pff-brand);
  color: var(--pff-on-brand);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: var(--touch-min);
  padding: 0.55rem 1.15rem;
  text-decoration: none;
  border: var(--hairline) solid transparent;
}

.btn-brand {
  background: var(--pff-brand);
  color: var(--pff-on-brand);
}

.btn-ghost {
  border-color: var(--pff-paper);
  color: var(--pff-paper);
}

.btn:focus-visible,
.lang-switch button:focus-visible,
.nav-links a:focus-visible,
.nav-toggle:focus-visible,
.logo:focus-visible,
.nav-scrim:focus-visible,
.back-to-top:focus-visible {
  outline: 2px solid var(--pff-brand);
  outline-offset: 3px;
}

.nav-toggle {
  display: none;
  width: var(--touch-min);
  height: var(--touch-min);
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.nav-toggle-icon,
.nav-toggle-icon::before,
.nav-toggle-icon::after {
  display: block;
  width: 1.15rem;
  height: 2px;
  background: currentColor;
  position: relative;
  transition: transform var(--duration) var(--ease-out), top var(--duration) var(--ease-out),
    background-color var(--duration) var(--ease-out);
}

.nav-toggle-icon::before,
.nav-toggle-icon::after {
  content: "";
  position: absolute;
  left: 0;
}

.nav-toggle-icon::before {
  top: -6px;
}

.nav-toggle-icon::after {
  top: 6px;
}

body.is-nav-open .nav-toggle-icon {
  background: transparent;
}

body.is-nav-open .nav-toggle-icon::before {
  top: 0;
  transform: rotate(45deg);
}

body.is-nav-open .nav-toggle-icon::after {
  top: 0;
  transform: rotate(-45deg);
}

.nav-cta {
  display: none;
}

.nav-scrim {
  position: fixed;
  inset: var(--nav-height) 0 0 0;
  z-index: var(--z-scrim);
  background: rgba(18, 16, 12, 0.72);
  border: 0;
  padding: 0;
  cursor: pointer;
}

.hero {
  position: relative;
  background: var(--pff-ink);
  /* Panel delay is the sum of the rule delay and the rule duration. Keep those two in step. */
  --hero-inset: clamp(1.5rem, 3vw, 3rem);
  --hero-ink-hang: 1.15rem;
  --hero-rule-size: 8px;
  --hero-pad-top: 1.3rem;
  --hero-pad-inline: 1.5rem;
  --hero-pad-bottom: 2.2rem;
  --hero-stack-gap: 0.72rem;
  --hero-birth-ms: 880;
  --hero-rule-delay-ms: 760;
  --hero-rule-ms: 720;
  --hero-panel-ms: 1100;
  --hero-rule-ease: cubic-bezier(0.45, 0, 0.2, 1);
  --hero-panel-ease: linear;
  padding-bottom: var(--hero-ink-hang);
}

.hero-visual {
  position: relative;
  width: 100%;
  height: calc(100vh - var(--nav-height) - var(--hero-ink-hang));
  height: calc(100svh - var(--nav-height) - var(--hero-ink-hang));
  overflow: hidden;
  background: var(--pff-sky);
}

.hero-visual img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  max-width: none;
  object-fit: cover;
  object-position: 52% 42%;
}

.hero-stage {
  position: absolute;
  z-index: 2;
  left: max(var(--hero-inset), env(safe-area-inset-left));
  bottom: 0;
  width: min(42vw, 34rem);
  max-width: calc(100% - var(--hero-inset) - env(safe-area-inset-right));
}

html[data-lang="en"] .hero-stage {
  width: min(48vw, 40rem);
}

.hero-birth {
  display: none;
  position: absolute;
  z-index: 3;
  left: 0;
  top: calc(var(--hero-rule-size) / 2);
  width: 0.8rem;
  height: 0.8rem;
  transform: translate(-50%, -50%);
  pointer-events: none;
}

.hero-birth-core,
.hero-birth-ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
}

.hero-birth-core {
  background: var(--pff-brand);
  box-shadow: 0 0 14px 4px rgba(248, 168, 0, 0.72);
}

.hero-birth-ring {
  border: 2px solid var(--pff-brand);
}

.hero-rule {
  position: relative;
  z-index: 2;
  height: var(--hero-rule-size);
  background: var(--pff-brand);
  box-shadow: 0 0 18px rgba(248, 168, 0, 0.72);
  transform-origin: left center;
}

.hero-rule::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 2.75rem;
  height: 100%;
  background: linear-gradient(90deg, transparent, #fff6d8);
  opacity: 0;
  pointer-events: none;
}

.hero-reveal {
  position: relative;
  z-index: 1;
}

.hero-inner {
  display: grid;
  gap: var(--hero-stack-gap);
  padding: var(--hero-pad-top) var(--hero-pad-inline) var(--hero-pad-bottom);
  background: rgba(18, 16, 12, 0.78);
}

@supports (color: color-mix(in srgb, black 50%, transparent)) {
  .hero-inner {
    background: color-mix(in srgb, var(--pff-ink) 78%, transparent);
  }
}

html.hero-animate .hero-birth {
  display: block;
  animation: hero-birth-life calc((var(--hero-rule-delay-ms) + var(--hero-rule-ms)) * 1ms) linear both;
}

html.hero-animate .hero-birth-core {
  animation: hero-birth-core calc(var(--hero-birth-ms) * 1ms) cubic-bezier(0.16, 1, 0.3, 1) both;
}

html.hero-animate .hero-birth-ring {
  animation: hero-birth-ring 640ms ease-out 160ms both;
}

html.hero-animate .hero-birth-ring-second {
  animation-delay: 380ms;
}

html.hero-animate .hero-rule {
  animation: hero-rule-draw calc(var(--hero-rule-ms) * 1ms) var(--hero-rule-ease) calc(var(--hero-rule-delay-ms) * 1ms) both;
}

html.hero-animate .hero-rule::after {
  animation: hero-rule-tip calc(var(--hero-rule-ms) * 1ms) linear calc(var(--hero-rule-delay-ms) * 1ms) both;
}

html.hero-animate .hero-reveal {
  animation: hero-panel-open calc(var(--hero-panel-ms) * 1ms) var(--hero-panel-ease)
    calc((var(--hero-rule-delay-ms) + var(--hero-rule-ms)) * 1ms) both;
}

@keyframes hero-birth-life {
  0%, 84% { opacity: 1; }
  100% { opacity: 0; }
}

@keyframes hero-birth-core {
  0% { transform: scale(0); opacity: 0; }
  22% { transform: scale(1); opacity: 1; }
  48% { transform: scale(1.34); }
  68% { transform: scale(0.92); }
  84% { transform: scale(1.08); }
  100% { transform: scale(1); opacity: 1; }
}

@keyframes hero-birth-ring {
  0% { transform: scale(0.4); opacity: 0.9; }
  100% { transform: scale(3.4); opacity: 0; }
}

@keyframes hero-rule-draw {
  from { transform: scaleX(0); }
  to { transform: scaleX(1); }
}

@keyframes hero-rule-tip {
  0% { opacity: 0; }
  18% { opacity: 1; }
  100% { opacity: 0; }
}

@keyframes hero-panel-open {
  0% { clip-path: inset(0 0 100% 0); }
  72% { clip-path: inset(0 0 6% 0); }
  100% { clip-path: inset(0 0 0 0); }
}

@media (prefers-reduced-motion: reduce) {
  html.hero-animate .hero-birth,
  html.hero-animate .hero-birth-core,
  html.hero-animate .hero-birth-ring,
  html.hero-animate .hero-rule,
  html.hero-animate .hero-rule::after,
  html.hero-animate .hero-reveal {
    animation: none;
  }

  html.hero-animate .hero-birth {
    display: none;
  }

  html.hero-animate .hero-rule {
    transform: none;
  }

  html.hero-animate .hero-reveal {
    clip-path: none;
  }
}

.hero-eyebrow,
.section-kicker {
  margin: 0 0 0.85rem;
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--pff-text-dim);
}

.hero-eyebrow {
  margin: 0;
  color: var(--pff-text-secondary);
}

.hero h1 {
  margin: 0;
  max-width: 16em;
  font-size: clamp(1.5rem, 2.4vw, 2.65rem);
  font-weight: 500;
  line-height: 1.2;
  word-break: keep-all;
}

.hero-sub {
  margin: 0;
  max-width: 36rem;
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--pff-text-secondary);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 0.2rem;
}

.impact {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1.25rem 2rem;
  width: min(100%, var(--page-max));
  margin: 0 auto;
  padding: 1.8rem max(var(--page-pad), env(safe-area-inset-left));
  padding-right: max(var(--page-pad), env(safe-area-inset-right));
}

.impact article {
  padding: 0;
}

.stat-number {
  display: block;
  font-variant-numeric: tabular-nums;
  font-weight: 600;
  letter-spacing: -0.03em;
  font-size: clamp(1.8rem, 3vw, 2.8rem);
  line-height: 1;
  margin-bottom: 0.55rem;
  color: var(--pff-paper);
}

.impact p {
  margin: 0;
  color: var(--pff-text-secondary);
  font-size: 0.88rem;
  word-break: keep-all;
}

.section {
  padding: clamp(3.5rem, 8vw, 7.5rem) max(var(--page-pad), env(safe-area-inset-left));
  padding-right: max(var(--page-pad), env(safe-area-inset-right));
}

.section-title {
  margin: 0 0 1.25rem;
  font-size: clamp(1.55rem, 2.4vw, 2.35rem);
  font-weight: 500;
  line-height: 1.18;
  word-break: keep-all;
}

.lede {
  max-width: var(--measure);
  line-height: 1.7;
  margin: 0;
  color: var(--pff-text-secondary);
}

.split,
.timeline,
.work-grid,
.proof-list,
.proof-photos,
.section > .section-kicker,
.section > .section-title {
  width: min(100%, var(--page-max));
  margin-left: auto;
  margin-right: auto;
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
  gap: clamp(1.5rem, 4vw, 4rem);
  align-items: center;
}

.split img,
.proof-photos img,
.team img {
  width: 100%;
  object-fit: cover;
}

.split img {
  height: min(38rem, 70vh);
}

.work-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2rem 3.25rem;
}

.work-grid article {
  padding: 0;
}

.work-grid h3 {
  margin: 0 0 0.7rem;
  font-size: 1.2rem;
  font-weight: 500;
}

.work-grid p {
  margin: 0;
  color: var(--pff-text-secondary);
  line-height: 1.65;
}

.timeline {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1.25rem;
}

.timeline article {
  border-top: var(--brand-rule) solid var(--pff-brand);
  padding-top: 1rem;
}

.timeline time {
  display: block;
  color: var(--pff-text-dim);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  margin-bottom: 0.55rem;
  font-variant-numeric: tabular-nums;
}

.timeline h3 {
  margin: 0 0 0.45rem;
  font-size: 1.05rem;
  font-weight: 500;
}

.timeline p {
  margin: 0;
  color: var(--pff-text-secondary);
  font-size: 0.92rem;
  line-height: 1.6;
}

.proof-photos {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 0.75rem;
  margin-bottom: 1.75rem;
}

.proof-photos img {
  height: min(22rem, 48vh);
}

.proof-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.9rem 2rem;
  margin: 0;
  padding: 0;
  list-style: none;
  color: var(--pff-text-secondary);
}

.proof-list li {
  padding: 0;
}

.team {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(1.5rem, 4vw, 3.5rem);
  align-items: center;
  width: min(100%, var(--page-max));
  margin-inline: auto;
}

.team img {
  height: min(32rem, 62vh);
  object-position: 50% 12%;
}

.cta {
  background: var(--pff-surface-2);
  container-type: inline-size;
  --cta-text-width: 42rem;
  --cta-code-gap: 2.25rem;
  --wechat-code-size: 8.75rem;
}

.cta-inner {
  width: min(100%, var(--cta-text-width));
}

.cta h2 {
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  margin: 0 0 1rem;
  font-weight: 500;
  word-break: keep-all;
}

.cta .lede {
  margin-bottom: 1.25rem;
}

.channel-list {
  margin: 0 0 0.35rem;
  padding: 0;
  list-style: none;
  color: var(--pff-paper);
}

.channel-list li {
  padding: 0.45rem 0;
  border-bottom: var(--hairline) solid var(--pff-rule-faint-strong);
}

.wechat-card {
  --wechat-code-size: 8.75rem;
  display: grid;
  justify-items: center;
  gap: 0.55rem;
  width: 100%;
  max-width: 100%;
  margin: 1.5rem 0 0;
  text-align: center;
}

.team .wechat-card img,
.cta .wechat-card img {
  width: var(--wechat-code-size);
  height: auto;
  max-width: 100%;
  object-fit: contain;
  padding: 0.4rem;
  background: var(--pff-paper);
}

.wechat-card figcaption {
  margin: 0;
  max-width: 16rem;
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  text-align: center;
  color: var(--pff-text-dim);
}

/* Wide enough for the code to sit beside the copy. Narrow screens keep it under the text. */
@container (min-width: 54rem) {
  .cta-inner {
    width: min(100%, calc(var(--cta-text-width) + var(--cta-code-gap) + var(--wechat-code-size)));
    display: grid;
    grid-template-columns: minmax(0, var(--cta-text-width)) var(--wechat-code-size);
    column-gap: var(--cta-code-gap);
    align-items: center;
  }

  .cta .wechat-card {
    width: var(--wechat-code-size);
    margin: 0;
  }

  .cta .wechat-card figcaption {
    max-width: 100%;
  }
}

.site-footer {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 1.5rem;
  align-items: end;
  padding: 2.5rem max(var(--page-pad), env(safe-area-inset-right))
    calc(5.15rem + env(safe-area-inset-bottom)) max(var(--page-pad), env(safe-area-inset-left));
  border-top: var(--hairline) solid var(--pff-line);
}

.footer-brand img {
  height: 1.55rem;
  width: auto;
}

.footer-meta {
  color: var(--pff-text-dim);
  font-size: 0.88rem;
}

.clock {
  font-variant-numeric: tabular-nums;
}

.clock-care {
  margin: 0.35rem 0;
}

.clock-now {
  margin: 0;
  font-size: 0.82rem;
}

@media (max-width: 1080px) {
  .logo img {
    height: 1.4rem;
  }

  .header-tools .btn-brand {
    display: none;
  }

  .nav-cta {
    display: list-item;
  }
}

@media (max-width: 900px) {
  .nav-toggle {
    display: inline-flex;
    order: 3;
  }

  .header-tools {
    order: 2;
    margin-left: auto;
  }

  .site-header nav {
    flex: 0 0 0;
    width: 0;
    min-width: 0;
    overflow: visible;
    justify-content: flex-start;
  }

  .header-tools .btn-brand {
    display: none;
  }

  .nav-cta {
    display: block;
    padding-top: 0.4rem;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    z-index: var(--z-nav);
    flex-direction: column;
    align-items: flex-start;
    min-height: calc(100vh - var(--nav-height));
    min-height: calc(100svh - var(--nav-height));
    padding: 1rem max(var(--page-pad), env(safe-area-inset-left))
      calc(1.4rem + env(safe-area-inset-bottom));
    gap: 0.2rem;
    background: var(--pff-ink);
    border-bottom: var(--hairline) solid var(--pff-line);
  }

  body.is-nav-open {
    overflow: hidden;
  }

  body.is-nav-open .nav-links {
    display: flex;
  }

  .hero-stage,
  html[data-lang="en"] .hero-stage {
    width: min(68vw, 36rem);
  }
}

@media (max-width: 1100px) {
  .impact,
  .timeline,
  .proof-list,
  .proof-photos {
    grid-template-columns: 1fr 1fr;
  }

  .split,
  .team,
  .site-footer {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .impact,
  .work-grid,
  .timeline,
  .proof-list,
  .proof-photos {
    grid-template-columns: 1fr;
  }

  .split img,
  .team img,
  .proof-photos img {
    height: 22rem;
  }
}

@media (max-width: 700px) {
  .hero {
    --hero-inset: 1.15rem;
    --hero-pad-top: 1rem;
    --hero-pad-inline: 1.15rem;
    --hero-pad-bottom: 1.2rem;
    --hero-stack-gap: 0.65rem;
    padding-bottom: 0;
  }

  .hero-visual {
    height: min(46svh, 22rem);
  }

  .hero-visual img {
    object-position: 62% 40%;
  }

  .hero-stage,
  html[data-lang="en"] .hero-stage {
    position: relative;
    left: auto;
    bottom: auto;
    width: auto;
    max-width: none;
    margin: -1.25rem max(var(--hero-inset), env(safe-area-inset-right)) 0
      max(var(--hero-inset), env(safe-area-inset-left));
  }

  .hero h1 {
    font-size: 1.45rem;
    line-height: 1.18;
  }

  .hero-sub {
    font-size: 0.95rem;
    line-height: 1.5;
  }

  .wechat-card {
    --wechat-code-size: 10.5rem;
  }
}

@media (max-height: 800px) and (min-width: 701px) {
  .hero {
    --hero-pad-top: 0.95rem;
    --hero-pad-bottom: 1.55rem;
    --hero-stack-gap: 0.65rem;
    --hero-ink-hang: 0.75rem;
  }

  .hero h1 {
    font-size: clamp(1.3rem, 2.1vw, 1.85rem);
  }

  .hero-sub {
    font-size: 0.95rem;
    line-height: 1.45;
  }
}

@media (min-width: 1800px) {
  .hero-visual img {
    object-position: 50% 40%;
  }
}

@media (horizontal-viewport-segments: 2) {
  .section,
  .impact,
  .site-footer {
    padding-right: max(50vw, env(safe-area-inset-right));
  }

  .hero-stage,
  html[data-lang="en"] .hero-stage {
    width: min(42vw, 34rem);
  }
}