.page-about {
  background: var(--paper);
  color: var(--char);
  font-family: var(--font-sans);
  overflow-x: hidden;
}

.page-about .about-crumb {
  padding: clamp(0.9rem, 2vw, 1.3rem) 0 0;
}

/* ---------- 封面 ---------- */
.page-about .about-hero {
  position: relative;
  margin-top: clamp(0.6rem, 1.6vw, 1rem);
  padding: clamp(1.8rem, 5vw, 3.2rem) 0 clamp(2.2rem, 5vw, 3.4rem);
  background: linear-gradient(158deg, var(--ink) 0%, var(--ink-deep) 58%, var(--teal) 100%);
  color: var(--paper);
  overflow: hidden;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 3px;
  background: linear-gradient(90deg, var(--gold) 0%, rgba(200, 169, 106, 0.15) 78%, transparent 100%);
}

.page-about .about-hero__inner {
  display: grid;
  gap: clamp(1.5rem, 3.5vw, 2.6rem);
}

.page-about .about-hero__kicker {
  margin: 0 0 0.9rem;
  font-size: 0.7rem;
  letter-spacing: 0.26em;
  color: var(--gold);
  text-transform: uppercase;
}

.page-about .about-hero__title {
  margin: 0 0 1rem;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(1.8rem, 6vw, 3.3rem);
  line-height: 1.3;
  letter-spacing: 0.01em;
}

.page-about .about-hero__lead {
  margin: 0;
  max-width: 34em;
  font-size: clamp(0.95rem, 1.2vw, 1.05rem);
  line-height: 1.9;
  color: rgba(244, 239, 230, 0.82);
}

.page-about .about-meta {
  list-style: none;
  margin: 1.6rem 0 0;
  padding: 1rem 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem 1.6rem;
  border-top: 1px solid var(--line-light);
}

.page-about .about-meta__item {
  display: flex;
  align-items: baseline;
  gap: 0.45rem;
  font-size: 0.85rem;
  color: rgba(244, 239, 230, 0.92);
}

.page-about .about-meta__term {
  font-size: 0.64rem;
  letter-spacing: 0.2em;
  color: var(--gold-pale);
}

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

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  border: 1px solid var(--line-gold);
  box-shadow: var(--shadow-soft);
}

/* ---------- 主体布局 ---------- */
.page-about .about-body {
  display: grid;
  gap: clamp(1.6rem, 3vw, 2.4rem);
  padding-top: clamp(1.8rem, 4vw, 3rem);
  padding-bottom: clamp(2.6rem, 6vw, 4.5rem);
}

.page-about .about-rail {
  border: 1px solid var(--line);
  background: var(--paper-tint);
  padding: 1rem 1.1rem 1.1rem;
}

.page-about .about-rail__label {
  margin: 0 0 0.65rem;
  font-size: 0.64rem;
  letter-spacing: 0.24em;
  color: var(--moss);
}

.page-about .about-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.95rem;
}

.page-about .about-rail__link {
  display: inline-flex;
  align-items: center;
  gap: 0.42rem;
  padding: 0.2rem 0;
  font-size: 0.88rem;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible {
  color: var(--wine);
  border-bottom-color: var(--wine);
}

.page-about .about-rail__num {
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  color: var(--gold);
}

.page-about .about-rail__note {
  margin: 0.9rem 0 0;
  font-size: 0.78rem;
  line-height: 1.75;
  color: var(--moss);
}

/* ---------- 章节通用 ---------- */
.page-about .about-section {
  scroll-margin-top: 90px;
}

.page-about .about-section + .about-section {
  margin-top: clamp(2rem, 5vw, 3.2rem);
  padding-top: clamp(1.8rem, 4vw, 2.8rem);
  border-top: 1px solid var(--line);
}

.page-about .about-head {
  display: grid;
  grid-template-columns: auto 1fr;
  column-gap: 0.8rem;
  align-items: baseline;
  margin-bottom: 1.1rem;
}

.page-about .about-head__num {
  font-size: 0.76rem;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.page-about .about-head__title {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(1.28rem, 4vw, 1.78rem);
  line-height: 1.42;
  color: var(--ink);
}

.page-about .about-head__sub {
  grid-column: 2;
  margin: 0.3rem 0 0;
  font-size: 0.66rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-about .about-lead {
  margin: 0 0 1.4rem;
  max-width: 36em;
  line-height: 1.9;
  color: var(--char);
}

/* ---------- 01 起点 ---------- */
.page-about .about-start {
  display: grid;
  gap: 1.3rem;
}

.page-about .about-start__text p {
  margin: 0 0 1rem;
  max-width: 36em;
  line-height: 1.9;
}

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

.page-about .about-quote {
  margin: 0;
  padding: 1.1rem 1.2rem;
  border-left: 2px solid var(--gold);
  background: var(--paper-tint);
}

.page-about .about-quote__en {
  margin: 0 0 0.45rem;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.2em;
  color: var(--moss);
}

.page-about .about-quote__cn {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 1.12rem;
  line-height: 1.7;
  color: var(--ink);
}

/* ---------- 02 流程与团队 ---------- */
.page-about .about-process {
  margin: 0 0 1.6rem;
}

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

.page-about .about-process__line {
  stroke: var(--gold);
  stroke-width: 1;
  stroke-dasharray: 4 7;
}

.page-about .about-process__dots circle {
  fill: var(--ink);
  stroke: var(--gold);
  stroke-width: 3;
}

.page-about .about-process__labels text {
  font-family: var(--font-serif);
  font-size: 17px;
  fill: var(--ink);
}

.page-about .about-process__nums text {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  fill: var(--mist);
}

.page-about .about-process__cap {
  margin: 0.7rem 0 0;
  font-size: 0.78rem;
  line-height: 1.7;
}

.page-about .about-team {
  display: grid;
  gap: 1.4rem;
}

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

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  border: 1px solid var(--line);
}

.page-about .about-team__body p {
  margin: 0 0 1.2rem;
  line-height: 1.9;
}

.page-about .about-team__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.9rem;
}

.page-about .about-team__row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.35rem 0.8rem;
  align-items: baseline;
  padding-bottom: 0.7rem;
  border-bottom: 1px solid var(--line);
}

.page-about .about-team__role {
  font-size: 0.95rem;
  color: var(--ink);
}

.page-about .about-team__count {
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--wine);
}

.page-about .about-team__bar {
  grid-column: 1 / -1;
  height: 3px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--teal), var(--gold));
}

.page-about .about-team__bar--6 {
  width: 50%;
}

.page-about .about-team__bar--3 {
  width: 25%;
}

/* ---------- 03 板块 ---------- */
.page-about .about-boards {
  border-top: 1px solid var(--line);
}

.page-about .about-board {
  display: grid;
  gap: 0.55rem;
  padding: 1.2rem 0.1rem;
  border-bottom: 1px solid var(--line);
  transition: background-color 0.24s var(--ease), padding-left 0.24s var(--ease);
}

.page-about .about-board:hover {
  background: var(--paper-tint);
  padding-left: 0.8rem;
}

.page-about .about-board__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem;
}

.page-about .about-board__title {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(1.08rem, 3vw, 1.35rem);
  color: var(--ink);
}

.page-about .about-board__text {
  margin: 0;
  max-width: 38em;
  line-height: 1.9;
  font-size: 0.95rem;
}

.page-about .about-board__meta {
  margin: 0;
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  color: var(--mist);
}

/* ---------- 04 历程 ---------- */
.page-about .about-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0 0 1.4rem;
}

.page-about .about-jump__link {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  color: var(--ink);
  text-decoration: none;
  padding: 0.35rem 0.75rem;
  border: 1px solid var(--line-gold);
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .about-jump__link:hover,
.page-about .about-jump__link:focus-visible {
  background: var(--gold-pale);
  border-color: var(--gold);
  color: var(--wine);
}

.page-about .about-miles {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.2rem;
}

.page-about .about-mile {
  display: grid;
  gap: 0.7rem;
  scroll-margin-top: 96px;
}

.page-about .about-mile__year {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 0.2rem;
  background: linear-gradient(100deg, var(--ink) 0%, var(--teal) 55%, var(--gold) 100%);
  color: var(--paper);
}

.page-about .about-mile__year span {
  font-size: 1.02rem;
  letter-spacing: 0.16em;
}

.page-about .about-mile__body h3 {
  margin: 0 0 0.4rem;
  font-family: var(--font-serif);
  font-size: 1.05rem;
  color: var(--ink);
}

.page-about .about-mile__body p {
  margin: 0;
  line-height: 1.9;
  font-size: 0.94rem;
}

.page-about .about-mile__note {
  margin: 1.3rem 0 0;
  padding-left: 0.9rem;
  border-left: 2px solid var(--line-gold);
  font-size: 0.85rem;
  line-height: 1.8;
  color: var(--moss);
}

/* ---------- 05 合作 ---------- */
.page-about .about-partners {
  display: grid;
  gap: 1.3rem;
  margin-bottom: 1.4rem;
}

.page-about .about-partners__text p {
  margin: 0;
  max-width: 36em;
  line-height: 1.9;
}

.page-about .about-partners__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.1rem;
  align-content: start;
}

.page-about .about-partners__item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.9rem;
  align-items: baseline;
  padding: 0.75rem 0;
  border-bottom: 1px dashed var(--line-strong);
  font-size: 0.92rem;
}

.page-about .about-partners__item:first-child {
  border-top: 1px dashed var(--line-strong);
}

.page-about .about-partners__num {
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  color: var(--gold);
}

.page-about .about-partners__figure {
  margin: 0 0 0.9rem;
}

.page-about .about-partners__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border: 1px solid var(--line);
}

.page-about .about-partners__note {
  margin: 0;
  font-size: 0.84rem;
  line-height: 1.8;
  color: var(--moss);
}

/* ---------- 06 联络 ---------- */
.page-about .about-next {
  display: grid;
  gap: 1.5rem;
}

.page-about .about-next__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  align-content: start;
}

.page-about .about-next__contact {
  padding: 1.2rem 1.15rem 1.3rem;
  background: var(--paper-tint);
  border: 1px solid var(--line);
}

.page-about .about-next__label {
  margin: 0 0 0.7rem;
  font-size: 0.64rem;
  letter-spacing: 0.24em;
  color: var(--moss);
}

.page-about .about-next__contact > p {
  margin: 0 0 1rem;
  font-size: 0.93rem;
  line-height: 1.85;
}

.page-about .about-contact {
  list-style: none;
  margin: 0 0 1rem;
  padding: 0;
  display: grid;
  gap: 0.55rem;
}

.page-about .about-contact__row {
  display: grid;
  grid-template-columns: 4.6em 1fr;
  gap: 0.6rem;
  align-items: baseline;
  font-size: 0.88rem;
}

.page-about .about-contact__term {
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--moss);
}

.page-about .about-contact__val {
  color: var(--char);
  overflow-wrap: anywhere;
}

.page-about .about-next__more {
  display: inline-block;
  font-size: 0.85rem;
  color: var(--wine);
  text-decoration: none;
  border-bottom: 1px solid var(--line-gold);
  padding-bottom: 0.15rem;
  transition: border-color 0.2s var(--ease);
}

.page-about .about-next__more:hover,
.page-about .about-next__more:focus-visible {
  border-bottom-color: var(--wine);
}

/* ---------- 桌面端 ---------- */
@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: center;
    gap: 3rem;
  }

  .page-about .about-hero__figure img {
    aspect-ratio: 4 / 5;
  }

  .page-about .about-body {
    grid-template-columns: 176px minmax(0, 1fr);
    gap: 3.2rem;
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: 92px;
    border: 0;
    border-left: 1px solid var(--line);
    background: transparent;
    padding: 0.2rem 0 0.2rem 1.1rem;
  }

  .page-about .about-rail__list {
    display: grid;
    gap: 0.1rem;
  }

  .page-about .about-rail__link {
    display: flex;
    padding: 0.36rem 0;
    font-size: 0.85rem;
  }

  .page-about .about-start {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: 2.4rem;
    align-items: start;
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, 0.72fr) minmax(0, 1.28fr);
    gap: 2.2rem;
    align-items: start;
  }

  .page-about .about-mile {
    grid-template-columns: 132px minmax(0, 1fr);
    gap: 1.6rem;
    align-items: start;
  }

  .page-about .about-mile__year {
    padding: 0.9rem 0.2rem;
  }

  .page-about .about-mile__body {
    padding-top: 0.35rem;
  }

  .page-about .about-partners {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: 2.4rem;
    align-items: start;
  }

  .page-about .about-next {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    gap: 2.4rem;
    align-items: start;
  }

  .page-about .about-next__links {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (min-width: 1180px) {
  .page-about .about-hero {
    padding-bottom: 3.8rem;
  }

  .page-about .about-board {
    padding: 1.5rem 0.1rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-rail__link,
  .page-about .about-board,
  .page-about .about-jump__link,
  .page-about .about-next__more {
    transition: none;
  }
}