.page-about {
  background: var(--pitch-deep);
  color: var(--flood);
  font-family: var(--font-body);
}

.page-about .about-crumbs {
  padding-top: clamp(1rem, 3vw, 1.6rem);
}

.page-about .breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-faint);
}

.page-about .breadcrumbs li + li::before {
  content: "/";
  margin-right: 0.35rem;
  color: var(--line-strong);
}

.page-about .breadcrumbs a {
  color: var(--text-soft);
  text-decoration: none;
}

.page-about .breadcrumbs a:hover {
  color: var(--mint);
}

.page-about .label {
  margin: 0 0 0.6rem;
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--mint);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding-top: clamp(1.4rem, 4vw, 2.6rem);
  padding-bottom: clamp(0.5rem, 2vw, 1rem);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 460px;
  background: radial-gradient(120% 90% at 78% -20%, rgba(95, 242, 194, 0.16), transparent 62%);
  pointer-events: none;
}

.page-about .about-hero__grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 2.6rem);
  align-items: start;
}

.page-about .about-hero__story h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--fs-h1);
  font-weight: 700;
  line-height: 1.06;
  letter-spacing: 0.01em;
  max-width: 18ch;
}

.page-about .about-hero__lead {
  margin: 1rem 0 0;
  max-width: 46ch;
  font-size: clamp(1rem, 1.5vw, 1.1rem);
  line-height: 1.8;
  color: var(--text-soft);
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.9rem;
  margin: clamp(1.4rem, 3vw, 2rem) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-hero__facts li {
  display: grid;
  grid-template-columns: 6.2rem minmax(0, 1fr);
  gap: 0.8rem;
  align-items: baseline;
  padding-bottom: 0.7rem;
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero__num {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-variant-numeric: tabular-nums;
  color: var(--mint);
  line-height: 1.1;
}

.page-about .about-hero__fact-txt {
  font-size: 0.92rem;
  line-height: 1.6;
  color: var(--text-soft);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: clamp(1.2rem, 3vw, 1.8rem);
}

.page-about .about-hero__panel {
  padding: clamp(1.1rem, 2.5vw, 1.6rem);
  border: 1px solid var(--line-strong);
  border-left: 3px solid var(--accent);
  background: var(--glass);
  backdrop-filter: blur(6px);
}

.page-about .about-panel__title {
  margin: 0 0 0.9rem;
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-faint);
}

.page-about .about-facts {
  margin: 0;
  display: grid;
  gap: 0.55rem;
}

.page-about .about-facts__row {
  display: grid;
  grid-template-columns: 6.4rem minmax(0, 1fr);
  gap: 0.7rem;
  padding-bottom: 0.55rem;
  border-bottom: 1px solid var(--line);
}

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

.page-about .about-facts dt {
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--text-faint);
}

.page-about .about-facts dd {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.55;
  color: var(--flood);
}

.page-about .about-board {
  display: block;
  width: 100%;
  height: auto;
  margin-top: 1rem;
  color: var(--mint);
  opacity: 0.8;
}

.page-about .about-hero__figure {
  position: relative;
  margin: clamp(1.6rem, 4vw, 2.6rem) 0 0;
  border: 1px solid var(--line);
  overflow: hidden;
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  max-height: 440px;
}

.page-about .about-hero__caption {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 0.45rem 0.85rem;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--flood);
  background: rgba(7, 18, 13, 0.72);
  border-top: 1px solid var(--line);
  border-right: 1px solid var(--line);
}

/* ---------- 通用版式 ---------- */
.page-about .about-section {
  padding-block: clamp(2.6rem, 6vw, 4.5rem);
}

.page-about .about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.6rem, 4vw, 3rem);
  align-items: start;
}

.page-about .about-col {
  min-width: 0;
}

.page-about .about-head {
  max-width: 62ch;
  margin-bottom: clamp(1.5rem, 4vw, 2.4rem);
}

.page-about .about-head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--fs-h2);
  font-weight: 700;
  line-height: 1.2;
}

.page-about .about-head__lead {
  margin: 0.85rem 0 0;
  font-size: 0.98rem;
  line-height: 1.8;
  color: var(--text-soft);
}

.page-about .prose p {
  margin: 0 0 1rem;
  font-size: var(--fs-body);
  line-height: 1.85;
  color: var(--text-soft);
}

.page-about .prose p:last-child {
  margin-bottom: 0;
}

/* ---------- 起点：习惯清单 ---------- */
.page-about .habit-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.9rem;
}

.page-about .habit-list__item {
  display: grid;
  grid-template-columns: 2.4rem minmax(0, 1fr);
  gap: 0.9rem;
  padding: 1rem 1.1rem;
  background: var(--pitch-mid);
  border-left: 2px solid var(--pitch-light);
}

.page-about .habit-list__num {
  font-family: var(--font-mono);
  font-size: 1.05rem;
  line-height: 1.6;
  color: var(--mint);
}

.page-about .habit-list__title {
  margin: 0 0 0.3rem;
  font-size: 1rem;
  font-weight: 600;
  color: var(--flood);
}

.page-about .habit-list__item p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--text-soft);
}

/* ---------- 团队目录 ---------- */
.page-about .about-section--team {
  background: linear-gradient(180deg, rgba(20, 77, 54, 0.55), rgba(11, 42, 31, 0) 70%);
}

.page-about .team-index {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-strong);
}

.page-about .team-index__item {
  display: grid;
  grid-template-columns: 2.6rem minmax(0, 1fr);
  gap: 0.7rem 1rem;
  padding: 1.15rem 0;
  border-bottom: 1px solid var(--line);
}

.page-about .team-index__num {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  letter-spacing: 0.06em;
  color: var(--text-faint);
  padding-top: 0.15rem;
}

.page-about .team-index__row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.35rem;
}

.page-about .team-index__name {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--flood);
}

.page-about .team-index__body p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--text-soft);
}

.page-about .about-team__aside {
  display: grid;
  gap: 0.8rem;
}

.page-about .about-team__figure {
  margin: 0;
  border: 1px solid var(--line);
  overflow: hidden;
}

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.page-about .about-team__cap {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-faint);
}

/* ---------- 时间线（浅色带） ---------- */
.page-about .about-band {
  background: var(--parchment);
  color: var(--ink);
  padding-block: clamp(2.6rem, 6vw, 4.5rem);
}

.page-about .about-band .label {
  color: var(--pitch-mid);
}

.page-about .about-band .about-head__lead {
  color: rgba(7, 18, 13, 0.76);
}

.page-about .about-band .about-head {
  max-width: 66ch;
}

.page-about .timeline-years {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: clamp(1.4rem, 3vw, 2rem);
}

.page-about .timeline-years a {
  display: inline-block;
  padding: 0.35rem 0.75rem;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  text-decoration: none;
  color: var(--ink);
  background: rgba(7, 18, 13, 0.06);
  border: 1px solid rgba(7, 18, 13, 0.22);
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .timeline-years a:hover,
.page-about .timeline-years a:focus-visible {
  background: var(--pitch-deep);
  color: var(--flood);
}

.page-about .timeline {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.6rem;
}

.page-about .timeline__item {
  position: relative;
  padding-top: 1.5rem;
  border-top: 2px solid rgba(7, 18, 13, 0.25);
}

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  top: -7px;
  left: 0;
  width: 12px;
  height: 12px;
  background: var(--csl);
  transform: skewX(-12deg);
}

.page-about .timeline__year {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.22rem;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
  color: var(--pitch-mid);
}

.page-about .timeline__title {
  margin: 0.5rem 0 0.35rem;
  font-size: 1rem;
  font-weight: 700;
}

.page-about .timeline__item p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.75;
  color: rgba(7, 18, 13, 0.74);
}

.page-about .about-band__figure {
  margin: clamp(1.8rem, 4vw, 2.8rem) 0 0;
  border-top: 3px solid var(--epl);
}

.page-about .about-band__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  max-height: 300px;
}

/* ---------- 合作生态 ---------- */
.page-about .eco-note {
  padding: 1.2rem 1.3rem;
  background: var(--pitch-mid);
  border-top: 3px solid var(--accent);
}

.page-about .eco-note__num {
  margin: 0 0 0.5rem;
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  font-variant-numeric: tabular-nums;
  color: var(--mint);
  line-height: 1.1;
}

.page-about .eco-note__txt {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--text-soft);
}

.page-about .eco-list {
  display: grid;
  gap: 0.7rem;
}

.page-about .eco-item {
  background: var(--pitch-mid);
  border: 1px solid var(--line);
}

.page-about .eco-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.95rem 1.1rem;
  cursor: pointer;
  list-style: none;
  font-size: 1rem;
  font-weight: 600;
  color: var(--flood);
}

.page-about .eco-item summary::-webkit-details-marker {
  display: none;
}

.page-about .eco-item summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--mint);
  transition: transform var(--dur) var(--ease);
}

.page-about .eco-item[open] summary::after {
  content: "–";
}

.page-about .eco-item__body {
  padding: 0 1.1rem 1.1rem;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--text-soft);
}

/* ---------- 回查三步 ---------- */
.page-about .about-section--check {
  background: var(--pitch-mid);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

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

.page-about .steps__item {
  padding: 1.2rem 1.2rem 1.3rem;
  background: rgba(7, 18, 13, 0.32);
  border-top: 2px solid var(--mint);
}

.page-about .steps__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.16em;
  color: var(--mint);
  margin-bottom: 0.5rem;
}

.page-about .steps__title {
  margin: 0 0 0.45rem;
  font-size: 1.02rem;
  font-weight: 600;
}

.page-about .steps__item p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.78;
  color: var(--text-soft);
}

.page-about .check-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: clamp(1.3rem, 3vw, 1.8rem);
}

/* ---------- 联系 ---------- */
.page-about .contact-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.4rem, 3vw, 2.2rem);
  padding: clamp(1.2rem, 3vw, 2rem);
  background: var(--pitch-mid);
  border-left: 4px solid var(--accent);
}

.page-about .contact-list {
  margin: 0;
  display: grid;
  gap: 0.7rem;
}

.page-about .contact-list__row {
  display: grid;
  grid-template-columns: 6.6rem minmax(0, 1fr);
  gap: 0.7rem;
  padding-bottom: 0.65rem;
  border-bottom: 1px solid var(--line);
}

.page-about .contact-list__row:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .contact-list dt {
  font-size: 0.8rem;
  letter-spacing: 0.05em;
  color: var(--text-faint);
}

.page-about .contact-list dd {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.65;
  color: var(--flood);
  overflow-wrap: anywhere;
}

.page-about .contact-list a {
  color: var(--mint);
  text-decoration: none;
  border-bottom: 1px solid rgba(95, 242, 194, 0.4);
}

.page-about .contact-list a:hover {
  border-bottom-color: var(--mint);
}

.page-about .contact-card__note {
  margin: 0 0 0.9rem;
  font-size: 0.94rem;
  line-height: 1.8;
  color: var(--text-soft);
}

.page-about .contact-card__meta {
  margin: 0 0 1.1rem;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--text-faint);
  overflow-wrap: anywhere;
}

/* ---------- 焦点可见 ---------- */
.page-about a:focus-visible,
.page-about summary:focus-visible {
  outline: 2px solid var(--mint);
  outline-offset: 3px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-hero__facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-hero__facts li {
    grid-template-columns: minmax(0, 1fr);
    gap: 0.35rem;
    border-bottom: 0;
    padding-bottom: 0;
    border-left: 1px solid var(--line);
    padding-left: 0.9rem;
  }
}

@media (min-width: 860px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.9fr);
    gap: clamp(2rem, 4vw, 3.2rem);
    align-items: end;
  }

  .page-about .about-grid--7-5 {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(2rem, 5vw, 3.6rem);
  }

  .page-about .about-grid--5-7 {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: clamp(2rem, 5vw, 3.4rem);
  }

  .page-about .timeline {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1.4rem;
  }

  .page-about .steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .contact-card {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  }

  .page-about .about-hero__figure img {
    aspect-ratio: 21 / 9;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .eco-item summary::after,
  .page-about .timeline-years a {
    transition: none;
  }
}