.page-about {
  --about-axis: 6px;
  --about-axis-dot: 0;
}

.page-about .section {
  padding-block: clamp(34px, 6vw, 72px);
}

.page-about .about-title {
  font-size: clamp(1.6rem, 3.2vw, 2.6rem);
  line-height: 1.18;
  letter-spacing: 0.02em;
  margin: 0 0 18px;
}

.page-about .about-section-lede {
  max-width: 46ch;
  color: var(--ink-soft);
  margin: 0 0 28px;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  padding-block: clamp(24px, 4vw, 48px) clamp(28px, 5vw, 56px);
}

.page-about .about-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 52px);
  align-items: end;
}

.page-about .about-hero h1 {
  font-size: clamp(2.1rem, 5.6vw, 3.7rem);
  line-height: 1.12;
  letter-spacing: 0.02em;
  margin: 12px 0 0;
}

.page-about .about-hero .lede {
  margin-top: 20px;
  max-width: 46ch;
  color: var(--ink-soft);
}

.page-about .about-hero-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 0;
}

.page-about .about-fact {
  background: var(--paper-raised);
  border-radius: var(--radius-md);
  padding: 16px 18px;
}

.page-about .about-fact-label {
  font-size: 0.82rem;
  color: var(--ink-muted);
  letter-spacing: 0.04em;
}

.page-about .about-fact-num {
  margin: 6px 0 0;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.15rem, 2.4vw, 1.55rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink);
}

@media (min-width: 900px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    gap: clamp(40px, 5vw, 72px);
  }
}

/* ---------- 我们每天在整理什么 ---------- */

.page-about .about-tracks {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
}

.page-about .about-track {
  border-left: 3px solid var(--line-strong);
  padding-left: 20px;
}

.page-about .about-track:first-of-type {
  border-left-color: var(--season);
}

.page-about .about-track + .about-track {
  margin-top: 28px;
}

.page-about .about-track h3 {
  margin: 0 0 8px;
  font-size: 1.08rem;
  letter-spacing: 0.03em;
}

.page-about .about-track p {
  color: var(--ink-soft);
  margin: 0;
}

.page-about .about-aside-note {
  margin: 22px 0 0;
  font-size: 0.92rem;
  color: var(--ink-muted);
  line-height: 1.7;
}

.page-about .about-seasons {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-season-chip {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--paper-raised);
  border: 1px solid var(--line);
  border-radius: var(--pill);
  padding: 10px 18px;
  font-size: 0.9rem;
  color: var(--ink-soft);
}

.page-about .about-season-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  flex: none;
}

.page-about .is-spring .about-season-dot {
  background: linear-gradient(135deg, var(--spring), var(--spring-soft));
}

.page-about .is-summer .about-season-dot {
  background: linear-gradient(135deg, var(--summer), var(--summer-soft));
}

.page-about .is-autumn .about-season-dot {
  background: linear-gradient(135deg, var(--autumn), var(--autumn-soft));
}

.page-about .is-winter .about-season-dot {
  background: linear-gradient(135deg, var(--winter-soft), var(--winter));
}

@media (min-width: 900px) {
  .page-about .about-tracks {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    gap: clamp(36px, 5vw, 64px);
    align-items: start;
  }
}

/* ---------- 图片 ---------- */

.page-about .about-figure {
  margin: 30px 0 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  border-radius: var(--radius-lg);
  object-fit: cover;
}

.page-about .about-figure figcaption {
  margin-top: 12px;
  font-size: 0.85rem;
  line-height: 1.65;
  color: var(--ink-muted);
  max-width: 58ch;
}

.page-about .about-figure--hero {
  margin: 0 0 40px;
}

/* ---------- 时间线 ---------- */

.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-stage {
  position: relative;
  padding-left: 34px;
  padding-bottom: 42px;
}

.page-about .about-stage:last-child {
  padding-bottom: 0;
}

.page-about .about-stage::before {
  content: "";
  position: absolute;
  left: var(--about-axis-dot);
  top: 4px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--paper);
  border: 2px solid var(--line-strong);
  z-index: 1;
}

.page-about .about-stage::after {
  content: "";
  position: absolute;
  left: var(--about-axis);
  top: 22px;
  bottom: 0;
  width: 2px;
  background: var(--line-strong);
}

.page-about .about-stage:last-child::after {
  display: none;
}

.page-about .about-stage.is-current::before {
  background: var(--brand);
  border-color: var(--brand);
}

.page-about .about-stage-label {
  display: inline-flex;
  align-items: center;
  border-radius: var(--pill);
  padding: 5px 14px;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  background: var(--paper-raised);
  color: var(--ink-soft);
  border: 1px solid var(--line);
}

.page-about .about-stage.is-current .about-stage-label {
  background: var(--brand);
  color: #FBF6EC;
  border-color: var(--brand);
}

.page-about .about-stage h3 {
  margin: 14px 0 10px;
  font-size: 1.16rem;
  letter-spacing: 0.02em;
}

.page-about .about-stage p {
  margin: 0;
  color: var(--ink-soft);
  max-width: 62ch;
}

@media (min-width: 900px) {
  .page-about {
    --about-axis: 200px;
    --about-axis-dot: 194px;
  }

  .page-about .about-stage {
    display: grid;
    grid-template-columns: 200px minmax(0, 1fr);
    padding-left: 0;
    padding-bottom: 52px;
  }

  .page-about .about-stage::before {
    top: 8px;
  }

  .page-about .about-stage::after {
    top: 26px;
  }

  .page-about .about-stage-marker {
    padding-right: 30px;
  }

  .page-about .about-stage-body {
    padding-left: 44px;
  }

  .page-about .about-stage h3 {
    margin-top: 0;
  }
}

/* ---------- 处理环节 ---------- */

.page-about .about-flow-segmented {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  background: var(--paper-raised);
  border-radius: var(--radius-lg);
  padding: 6px;
  margin-bottom: 30px;
}

.page-about .about-flow-tab {
  border: 0;
  background: transparent;
  border-radius: var(--pill);
  padding: 9px 18px;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  color: var(--ink-soft);
  cursor: pointer;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .about-flow-tab[aria-selected="true"] {
  background: var(--brand);
  color: #FBF6EC;
}

.page-about .about-flow-tab:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 2px;
}

.page-about .about-flow-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  align-items: start;
}

.page-about .about-flow-figure {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
}

.page-about .about-flow-panels {
  display: grid;
  gap: 20px;
}

.page-about .about-flow-panel {
  background: var(--paper-raised);
  border-radius: var(--radius-md);
  padding: 22px 24px;
}

.page-about .about-flow-panel[hidden] {
  display: none;
}

.page-about .about-flow-panel h3 {
  margin: 0 0 10px;
  font-size: 1.05rem;
  letter-spacing: 0.03em;
}

.page-about .about-flow-panel p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.96rem;
}

@media (min-width: 900px) {
  .page-about .about-flow-body {
    grid-template-columns: minmax(0, 0.86fr) minmax(0, 1.14fr);
    gap: clamp(36px, 5vw, 64px);
  }
}

/* ---------- 团队 ---------- */

.page-about .about-team-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}

.page-about .about-team-item {
  background: var(--paper-raised);
  border-radius: var(--radius-md);
  border-top: 3px solid var(--line-strong);
  padding: 22px 24px;
}

.page-about .about-team-item:nth-child(1) {
  border-top-color: var(--brand);
}

.page-about .about-team-item:nth-child(2) {
  border-top-color: var(--summer);
}

.page-about .about-team-item:nth-child(3) {
  border-top-color: var(--autumn);
}

.page-about .about-team-item:nth-child(4) {
  border-top-color: var(--winter);
}

.page-about .about-team-item h3 {
  margin: 0 0 8px;
  font-size: 1rem;
  letter-spacing: 0.04em;
}

.page-about .about-team-item p {
  margin: 0;
  font-size: 0.94rem;
  color: var(--ink-soft);
}

@media (min-width: 760px) {
  .page-about .about-team-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
  }

  .page-about .about-team-item:nth-child(even) {
    margin-top: 28px;
  }
}

/* ---------- 协作 ---------- */

.page-about .about-partners-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
  align-items: start;
}

.page-about .about-partners-text p {
  color: var(--ink-soft);
  max-width: 58ch;
}

.page-about .about-figure--side {
  margin: 0;
}

.page-about .about-inline-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

@media (min-width: 900px) {
  .page-about .about-partners-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    gap: clamp(36px, 5vw, 64px);
  }
}

/* ---------- 更新节奏 ---------- */

.page-about .about-rhythm-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
}

.page-about .about-rhythm-item {
  border-top: 2px solid var(--line-strong);
  padding-top: 18px;
}

.page-about .num-mark {
  margin: 0;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 0.84rem;
  letter-spacing: 0.08em;
  color: var(--brand);
}

.page-about .about-rhythm-item h3 {
  margin: 10px 0 8px;
  font-size: 1.02rem;
  letter-spacing: 0.02em;
}

.page-about .about-rhythm-item p {
  margin: 0;
  font-size: 0.94rem;
  color: var(--ink-soft);
}

@media (min-width: 760px) {
  .page-about .about-rhythm-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
  }
}

/* ---------- 收口 ---------- */

.page-about .about-cta-inner {
  background: var(--ink);
  border-radius: var(--radius-lg);
  padding: clamp(28px, 5vw, 54px);
}

.page-about .about-cta-inner h2 {
  margin: 0 0 12px;
  color: var(--paper);
  font-size: clamp(1.4rem, 2.8vw, 2.1rem);
  letter-spacing: 0.02em;
}

.page-about .about-cta-inner p {
  margin: 0;
  max-width: 50ch;
  color: #D6CCBA;
}

.page-about .about-cta-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px;
  margin-top: 24px;
}

.page-about .about-cta-link {
  color: var(--paper);
  font-size: 0.92rem;
  text-decoration: none;
  border-bottom: 1px solid rgba(251, 246, 236, 0.42);
  padding-bottom: 2px;
  transition: border-color var(--dur) var(--ease);
}

.page-about .about-cta-link:hover,
.page-about .about-cta-link:focus-visible {
  border-bottom-color: var(--paper);
}

.page-about .about-cta-link:focus-visible {
  outline: 2px solid var(--paper);
  outline-offset: 3px;
}

.page-about .about-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}

.page-about .about-link {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--line-strong);
  border-radius: var(--pill);
  padding: 9px 18px;
  font-size: 0.9rem;
  color: var(--ink);
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  border-color: var(--brand);
  background: var(--paper-raised);
}

.page-about .about-link:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 2px;
}

.page-about :focus-visible {
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-flow-tab,
  .page-about .about-link,
  .page-about .about-cta-link {
    transition: none;
  }
}