.page-about {
  --about-gutter: clamp(1.1rem, 4vw, 2.5rem);
  background: var(--sand-lite);
  color: var(--txt);
  overflow-x: hidden;
}

/* ============ 首屏 ============ */
.page-about .about-hero {
  position: relative;
  padding: clamp(1.4rem, 4vw, 2.2rem) 0 clamp(2.6rem, 6vw, 4.2rem);
  background:
    radial-gradient(115% 85% at 92% -12%, rgba(216, 166, 60, 0.28), rgba(216, 166, 60, 0) 62%),
    radial-gradient(85% 72% at 3% 4%, rgba(47, 107, 88, 0.16), rgba(47, 107, 88, 0) 68%),
    var(--sand);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(1.2rem, 3vw, 2rem);
  margin-top: clamp(1.6rem, 4vw, 2.6rem);
}

.page-about .about-hero__lead h1 {
  font-family: var(--serif);
  font-size: clamp(1.9rem, 6.4vw, 4rem);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -0.01em;
  margin: 0.5rem 0 0;
  color: var(--ink);
  max-width: 16ch;
}

.page-about .about-hero__aside .lede {
  margin: 0;
  font-size: clamp(1rem, 2.4vw, 1.0625rem);
  line-height: 1.75;
  color: var(--txt);
}

.page-about .about-hero .vertical-note {
  margin: 1rem 0 0;
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  color: var(--gold-deep);
}

.page-about .hero-facts {
  list-style: none;
  margin: clamp(2rem, 5vw, 3.2rem) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem 1.4rem;
}

.page-about .hero-facts__item {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding-top: 0.8rem;
  border-top: 1px solid var(--line);
}

.page-about .hero-facts__item:first-child {
  border-top-color: var(--gold);
}

.page-about .hero-facts__num {
  font-family: var(--mono);
  font-size: clamp(1.5rem, 4.6vw, 2.1rem);
  font-weight: 600;
  line-height: 1;
  color: var(--ink);
}

.page-about .hero-facts__label {
  font-size: 0.8125rem;
  color: var(--txt-2);
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: end;
    gap: clamp(1.5rem, 4vw, 3.6rem);
    position: relative;
    padding-right: 3.2rem;
  }

  .page-about .about-hero .vertical-note {
    position: absolute;
    right: 0;
    top: 0;
    margin: 0;
    writing-mode: vertical-rl;
    text-orientation: mixed;
    padding: 0.3rem 0.55rem 0.3rem 0;
    border-right: 1px solid var(--line-gold);
  }

  .page-about .hero-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1.2rem 2rem;
  }
}

/* ============ 起点与定位 ============ */
.page-about .origin {
  padding: clamp(3rem, 7vw, 5.5rem) 0 clamp(3rem, 7vw, 5rem);
}

.page-about .origin__grid {
  display: grid;
  gap: 1.2rem;
}

.page-about .origin__rail {
  border-left: 2px solid var(--gold);
  padding-left: 0.85rem;
}

.page-about .origin__body h2 {
  font-family: var(--serif);
  font-size: clamp(1.4rem, 3.6vw, 2rem);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -0.01em;
  margin: 0 0 1rem;
  color: var(--ink);
}

.page-about .origin__body .prose p {
  max-width: 62ch;
  margin: 0 0 1rem;
  line-height: 1.78;
  color: var(--txt);
}

.page-about .origin__cards {
  list-style: none;
  margin: clamp(1.4rem, 3vw, 2.2rem) 0 0;
  padding: 0;
  display: grid;
  gap: 0.9rem;
}

.page-about .origin__card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--r-organic);
  padding: 1.1rem 1.2rem;
  box-shadow: var(--sh-1);
  transition: transform var(--t) var(--ease), border-color var(--t) var(--ease);
}

.page-about .origin__card:hover {
  transform: translateY(-3px);
  border-color: var(--line-gold);
}

.page-about .origin__card h3 {
  margin: 0 0 0.4rem;
  font-family: var(--sans);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--gold-deep);
}

.page-about .origin__card p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--txt-2);
}

@media (min-width: 780px) {
  .page-about .origin__cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .origin__grid {
    grid-template-columns: 3fr 9fr;
    gap: clamp(1.5rem, 4vw, 3rem);
  }

  .page-about .origin__rail {
    padding-left: 1.1rem;
  }
}

/* ============ 时间轴 ============ */
.page-about .timeline {
  position: relative;
  padding: clamp(3rem, 7vw, 5.5rem) 0 clamp(3.5rem, 8vw, 6rem);
  background: var(--sand-lite);
  overflow: hidden;
}

.page-about .timeline__bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.page-about .timeline__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.2;
}

.page-about .timeline__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    var(--sand-lite) 0%,
    rgba(251, 246, 236, 0.5) 20%,
    rgba(251, 246, 236, 0.5) 80%,
    var(--sand-lite) 100%
  );
}

.page-about .timeline__wave {
  display: none;
}

.page-about .timeline .shell {
  position: relative;
  z-index: 1;
}

.page-about .timeline__head h2 {
  font-family: var(--serif);
  font-size: clamp(1.4rem, 3.6vw, 2rem);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -0.01em;
  margin: 0.5rem 0 0;
  color: var(--ink);
  max-width: 20ch;
}

.page-about .timeline__intro {
  margin: 0.9rem 0 0;
  max-width: 56ch;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--txt-2);
}

.page-about .timeline__list {
  list-style: none;
  margin: clamp(2rem, 5vw, 3.2rem) 0 0;
  padding: 0;
  display: grid;
  gap: clamp(1.6rem, 4vw, 2.8rem);
}

.page-about .tl-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.5rem;
  padding-left: 1.1rem;
  border-left: 2px solid var(--line-gold);
}

.page-about .tl-track {
  display: none;
}

.page-about .tl-year {
  font-family: var(--mono);
  font-size: 0.9375rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--gold-deep);
}

.page-about .tl-title {
  margin: 0.2rem 0 0.5rem;
  font-family: var(--serif);
  font-size: clamp(1.1rem, 2.6vw, 1.375rem);
  font-weight: 800;
  line-height: 1.35;
  color: var(--ink);
}

.page-about .tl-text {
  margin: 0;
  max-width: 58ch;
  font-size: 0.9375rem;
  line-height: 1.78;
  color: var(--txt);
}

.page-about .tl-extra {
  margin: 0.7rem 0 0;
  max-width: 58ch;
  font-size: 0.8125rem;
  line-height: 1.72;
  color: var(--txt-2);
  border-left: 2px solid var(--cyan);
  padding-left: 0.75rem;
}

@media (min-width: 900px) {
  .page-about .timeline__wave {
    display: block;
    position: absolute;
    top: 4%;
    right: -8%;
    width: 44%;
    height: 92%;
    color: rgba(216, 166, 60, 0.34);
    z-index: 0;
    pointer-events: none;
  }

  .page-about .tl-item {
    grid-template-columns: 7.5rem 2.5rem minmax(0, 1fr);
    gap: 0 1.5rem;
    padding-left: 0;
    border-left: 0;
    align-items: start;
  }

  .page-about .tl-year {
    padding-top: 0.2rem;
    text-align: right;
  }

  .page-about .tl-track {
    display: block;
    position: relative;
    align-self: stretch;
    min-height: 3.5rem;
  }

  .page-about .tl-track::before {
    content: "";
    position: absolute;
    top: 0.4rem;
    left: 50%;
    width: 13px;
    height: 13px;
    margin-left: -6.5px;
    border-radius: 50%;
    background: var(--gold);
    box-shadow: 0 0 0 4px rgba(216, 166, 60, 0.18);
    transition: transform var(--t) var(--ease), box-shadow var(--t) var(--ease);
  }

  .page-about .tl-track::after {
    content: "";
    position: absolute;
    top: 1.9rem;
    bottom: calc(-1 * clamp(1.6rem, 4vw, 2.8rem));
    left: 50%;
    width: 1px;
    margin-left: -0.5px;
    background: var(--line-gold);
  }

  .page-about .tl-item:last-child .tl-track::after {
    display: none;
  }

  .page-about .tl-item:hover .tl-track::before,
  .page-about .tl-item:focus-within .tl-track::before {
    transform: scale(1.18);
    box-shadow: 0 0 0 7px rgba(216, 166, 60, 0.22);
  }

  .page-about .tl-item:hover .tl-title,
  .page-about .tl-item:focus-within .tl-title {
    color: var(--gold-deep);
    transition: color var(--t) var(--ease);
  }
}

/* ============ 目录体系 ============ */
.page-about .catalog {
  padding: clamp(2.6rem, 6vw, 4.5rem) 0 clamp(3rem, 7vw, 5rem);
  background: var(--sand);
}

.page-about .catalog__grid {
  display: grid;
  gap: clamp(1.6rem, 4vw, 3rem);
  align-items: center;
}

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

.page-about .figure__media {
  overflow: hidden;
  border-radius: var(--r-organic-2);
  background: var(--sand-lite);
  border: 1px solid var(--line);
}

.page-about .figure--square .figure__media {
  aspect-ratio: 1 / 1;
}

.page-about .figure__media img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

.page-about .figure__caption {
  margin: 0.75rem 0 0;
  font-size: 0.8125rem;
  line-height: 1.7;
  color: var(--txt-2);
}

.page-about .catalog__body h2 {
  font-family: var(--serif);
  font-size: clamp(1.4rem, 3.6vw, 2rem);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -0.01em;
  margin: 0.5rem 0 1rem;
  color: var(--ink);
  max-width: 22ch;
}

.page-about .catalog__body .prose p {
  margin: 0 0 1rem;
  max-width: 60ch;
  line-height: 1.78;
  color: var(--txt);
}

.page-about .catalog__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 1.4rem 2.6rem;
  margin: 1.6rem 0 1.6rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--line);
}

.page-about .stat {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.page-about .stat__num {
  font-family: var(--mono);
  font-size: clamp(1.5rem, 4vw, 2rem);
  font-weight: 600;
  line-height: 1;
  color: var(--gold-deep);
}

.page-about .stat__label {
  font-size: 0.8125rem;
  color: var(--txt-2);
}

.page-about .catalog__link {
  margin: 0;
}

@media (min-width: 900px) {
  .page-about .catalog__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: clamp(2rem, 5vw, 4rem);
  }

  .page-about .catalog__media {
    margin-top: -1.5rem;
  }
}

/* ============ 团队与节奏（深墨绿带） ============ */
.page-about .team-band {
  position: relative;
  background: var(--ink);
  color: var(--sand);
  padding: clamp(3.2rem, 8vw, 5.6rem) 0 clamp(2.8rem, 7vw, 4.6rem);
}

.page-about .team-band::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: clamp(14px, 3.2vw, 46px);
  background: var(--sand);
  clip-path: polygon(0 0, 100% 0, 0 100%);
  pointer-events: none;
}

.page-about .team-band__head {
  padding-top: clamp(0.6rem, 2vw, 1.4rem);
}

.page-about .team-band .section-label {
  color: var(--gold-hi);
}

.page-about .team-band__head h2 {
  font-family: var(--serif);
  font-size: clamp(1.4rem, 3.8vw, 2.15rem);
  font-weight: 800;
  line-height: 1.28;
  letter-spacing: -0.01em;
  margin: 0.5rem 0 0;
  color: var(--paper);
  max-width: 20ch;
}

.page-about .team-band__lede {
  margin: 1rem 0 0;
  max-width: 62ch;
  font-size: 0.9375rem;
  line-height: 1.78;
  color: rgba(244, 231, 210, 0.86);
}

.page-about .team-band__grid {
  display: grid;
  gap: clamp(1.6rem, 4vw, 3rem);
  margin-top: clamp(1.8rem, 4vw, 2.8rem);
  align-items: start;
}

.page-about .team-band__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.2rem 1.4rem;
}

.page-about .team-band .stat {
  padding-top: 0.85rem;
  border-top: 1px solid rgba(216, 166, 60, 0.42);
}

.page-about .team-band .stat__num {
  color: var(--gold-hi);
  font-size: clamp(1.6rem, 4.6vw, 2.2rem);
}

.page-about .team-band .stat__label {
  color: rgba(244, 231, 210, 0.78);
}

.page-about .figure--ink .figure__media {
  background: var(--ink-2);
  border-color: rgba(41, 199, 184, 0.28);
}

.page-about .figure--ink .figure__caption {
  color: rgba(244, 231, 210, 0.72);
}

.page-about .team-band__note {
  margin-top: clamp(1.8rem, 4vw, 2.6rem);
  padding-top: 1.4rem;
  border-top: 1px solid rgba(244, 231, 210, 0.2);
}

.page-about .team-band__note p {
  margin: 0;
  max-width: 72ch;
  font-size: 0.9375rem;
  line-height: 1.78;
  color: rgba(244, 231, 210, 0.88);
}

.page-about .team-band__links {
  margin-top: 1.2rem;
}

@media (min-width: 900px) {
  .page-about .team-band__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
    gap: clamp(2rem, 5vw, 4rem);
  }

  .page-about .team-band__stats {
    gap: 1.6rem 2rem;
  }
}

/* ============ 服务覆盖与运营规模 ============ */
.page-about .reach {
  padding: clamp(3rem, 7vw, 5.5rem) 0 clamp(2.6rem, 6vw, 4.5rem);
  background: var(--sand-lite);
}

.page-about .reach__head h2 {
  font-family: var(--serif);
  font-size: clamp(1.4rem, 3.6vw, 2rem);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -0.01em;
  margin: 0.5rem 0 0;
  color: var(--ink);
}

.page-about .reach__lede {
  margin: 1rem 0 0;
  max-width: 68ch;
  font-size: 0.9375rem;
  line-height: 1.78;
  color: var(--txt);
}

.page-about .reach__list {
  list-style: none;
  margin: clamp(1.8rem, 4vw, 2.8rem) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.page-about .reach__item {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding: 1rem 1.1rem;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--r-organic);
  transition: transform var(--t) var(--ease), box-shadow var(--t) var(--ease);
}

.page-about .reach__item:hover {
  transform: translateY(-3px);
  box-shadow: var(--sh-2);
}

.page-about .reach__num {
  font-family: var(--mono);
  font-size: clamp(1.3rem, 4vw, 1.75rem);
  font-weight: 600;
  line-height: 1.1;
  color: var(--ink);
}

.page-about .reach__label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--txt);
}

.page-about .reach__note {
  font-size: 0.75rem;
  line-height: 1.65;
  color: var(--txt-2);
}

@media (min-width: 760px) {
  .page-about .reach__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.2rem;
  }
}

@media (min-width: 1100px) {
  .page-about .reach__list {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }
}

/* ============ 荣誉与合作生态 ============ */
.page-about .honor {
  padding: 0 0 clamp(3rem, 7vw, 5.5rem);
  background: var(--sand-lite);
}

.page-about .honor__head h2 {
  font-family: var(--serif);
  font-size: clamp(1.4rem, 3.6vw, 2rem);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -0.01em;
  margin: 0.5rem 0 0;
  color: var(--ink);
  max-width: 22ch;
}

.page-about .honor__lede {
  margin: 1rem 0 0;
  max-width: 62ch;
  font-size: 0.9375rem;
  line-height: 1.78;
  color: var(--txt-2);
}

.page-about .honor__list {
  list-style: none;
  margin: clamp(1.8rem, 4vw, 2.8rem) 0 0;
  padding: 0;
  display: grid;
  gap: 1.2rem;
}

.page-about .honor__card {
  position: relative;
  padding: 1.5rem 1.5rem 1.6rem;
  background: var(--paper);
  border-radius: var(--r-organic-2);
  border: 1px solid var(--line);
  transition: transform var(--t) var(--ease), box-shadow var(--t) var(--ease);
}

.page-about .honor__card::after {
  content: "";
  position: absolute;
  inset: 7px;
  border: 1px solid var(--line-gold);
  border-radius: 4px 18px 6px 16px;
  opacity: 0.72;
  pointer-events: none;
  transition: opacity var(--t) var(--ease);
}

.page-about .honor__card:hover {
  transform: translateY(-4px);
  box-shadow: var(--sh-2);
}

.page-about .honor__card:hover::after {
  opacity: 1;
}

.page-about .honor__year {
  margin: 0;
  font-family: var(--mono);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--gold-deep);
}

.page-about .honor__title {
  margin: 0.5rem 0 0.55rem;
  font-family: var(--serif);
  font-size: 1.0625rem;
  font-weight: 800;
  line-height: 1.4;
  color: var(--ink);
}

.page-about .honor__desc {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.72;
  color: var(--txt-2);
}

@media (min-width: 900px) {
  .page-about .honor__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.6rem;
    align-items: start;
  }

  .page-about .honor__card:nth-child(2) {
    margin-top: 2.2rem;
  }

  .page-about .honor__card:nth-child(3) {
    margin-top: 0.9rem;
  }
}

/* ============ 下一步 ============ */
.page-about .next-step {
  padding: clamp(2.4rem, 6vw, 4.2rem) 0 clamp(3rem, 7vw, 5rem);
  background:
    linear-gradient(180deg, rgba(47, 107, 88, 0.09), rgba(47, 107, 88, 0) 70%),
    var(--sand);
}

.page-about .next-step__inner {
  display: grid;
  gap: 1.6rem;
  padding: clamp(1.6rem, 4vw, 2.6rem);
  background: var(--paper);
  border: 1px solid var(--line);
  border-left: 4px solid var(--gold);
  border-radius: var(--r-organic);
  box-shadow: var(--sh-1);
}

.page-about .next-step__text h2 {
  font-family: var(--serif);
  font-size: clamp(1.25rem, 3.2vw, 1.75rem);
  font-weight: 800;
  line-height: 1.32;
  letter-spacing: -0.01em;
  margin: 0.5rem 0 0.8rem;
  color: var(--ink);
}

.page-about .next-step__text p {
  margin: 0;
  max-width: 62ch;
  font-size: 0.9375rem;
  line-height: 1.78;
  color: var(--txt);
}

.page-about .next-step__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

@media (min-width: 900px) {
  .page-about .next-step__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: center;
    gap: clamp(1.5rem, 4vw, 3rem);
  }

  .page-about .next-step__actions {
    justify-content: flex-end;
  }
}

/* ============ 无障碍与动效收敛 ============ */
@media (prefers-reduced-motion: reduce) {
  .page-about .origin__card,
  .page-about .reach__item,
  .page-about .honor__card,
  .page-about .tl-track::before {
    transition: none;
  }

  .page-about .origin__card:hover,
  .page-about .reach__item:hover,
  .page-about .honor__card:hover {
    transform: none;
  }
}