.page-about {
  --about-rail: clamp(72px, 9vw, 132px);
  --about-gap: clamp(56px, 8vw, 112px);
  color: var(--warm);
  background: var(--indigo);
}

.page-about .shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.page-about .about-network__link {
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid rgba(212, 162, 76, .5);
  transition: border-color var(--t-fast), color var(--t-fast);
}

.page-about .about-network__link:hover,
.page-about .about-network__link:focus-visible {
  color: var(--mist);
  border-color: var(--mist);
}

/* ---------- HERO ---------- */
.page-about .about-hero {
  position: relative;
  padding: calc(var(--header-h) + 40px) 0 clamp(48px, 7vw, 96px);
  background:
    radial-gradient(120% 90% at 82% 6%, rgba(74, 59, 107, .55), transparent 62%),
    radial-gradient(90% 70% at 4% 100%, rgba(111, 174, 155, .16), transparent 60%),
    linear-gradient(180deg, var(--indigo) 0%, var(--indigo-2) 100%);
  overflow: hidden;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle, rgba(212, 162, 76, .5) 1px, transparent 1.6px),
    radial-gradient(circle, rgba(251, 247, 240, .35) 1px, transparent 1.6px);
  background-size: 190px 150px, 260px 220px;
  background-position: 20px 40px, 120px 90px;
  opacity: .3;
  pointer-events: none;
}

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

.page-about .breadcrumbs {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: rgba(251, 247, 240, .62);
  margin: 0 0 clamp(28px, 5vw, 56px);
}

.page-about .breadcrumbs a {
  color: rgba(251, 247, 240, .82);
  text-decoration: none;
}

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

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(28px, 5vw, 56px);
  align-items: end;
}

.page-about .about-hero__eyebrow {
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--gold);
  margin: 0 0 18px;
}

.page-about .about-hero__title {
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: clamp(2.4rem, 7.2vw, 5rem);
  line-height: 1.06;
  letter-spacing: -0.02em;
  margin: 0 0 24px;
  color: var(--warm);
}

.page-about .about-hero__lead {
  max-width: 34em;
  color: rgba(251, 247, 240, .86);
  margin: 0 0 30px;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

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

.page-about .about-hero__figure {
  margin: clamp(40px, 6vw, 72px) 0 0;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid rgba(212, 162, 76, .3);
}

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

.page-about .about-hero__figure .media-frame__caption {
  display: block;
  padding: 14px 20px;
  font-size: 14px;
  color: rgba(251, 247, 240, .7);
  background: rgba(14, 27, 54, .7);
}

/* ---------- 起步 ---------- */
.page-about .about-center {
  padding: var(--about-gap) 0;
  background: linear-gradient(180deg, var(--indigo-2), var(--indigo));
}

.page-about .about-center__grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
}

.page-about .about-center__rail {
  display: flex;
  align-items: center;
  gap: 14px;
  color: var(--gold);
  font-size: 12px;
  letter-spacing: .18em;
}

.page-about .about-center__rail-line {
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--gold), transparent);
}

.page-about .about-center__body .section-head {
  margin-bottom: 26px;
}

.page-about .section-num {
  display: block;
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--gold);
  margin-bottom: 10px;
}

.page-about .section-title {
  font-family: var(--font-serif);
  font-weight: 800;
  font-size: clamp(1.6rem, 4vw, 2.6rem);
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin: 0;
  color: var(--warm);
}

.page-about .section-head--center {
  text-align: center;
  margin-bottom: clamp(36px, 5vw, 64px);
}

.page-about .section-head--center .lead {
  margin-inline: auto;
}

.page-about .prose {
  max-width: 34em;
  font-size: 17px;
  line-height: 1.85;
  color: rgba(251, 247, 240, .84);
  margin: 0 0 1.2em;
}

.page-about .lead {
  font-size: clamp(1rem, 1.6vw, 1.125rem);
  line-height: 1.8;
  color: rgba(251, 247, 240, .78);
  max-width: 36em;
}

.page-about .about-facts {
  display: grid;
  gap: 18px;
  margin-top: 34px;
  padding-top: 26px;
  border-top: 1px solid rgba(212, 162, 76, .28);
}

.page-about .about-facts__item {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-facts__num {
  font-size: 1.6rem;
  color: var(--gold);
  letter-spacing: .04em;
}

.page-about .about-facts__label {
  font-size: 14px;
  color: rgba(251, 247, 240, .66);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  padding: var(--about-gap) 0;
  background: var(--indigo);
}

.page-about .about-timeline__list {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.page-about .about-timeline__list::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: linear-gradient(180deg, rgba(212, 162, 76, .55), rgba(212, 162, 76, .1));
}

.page-about .about-timeline__item {
  position: relative;
  display: grid;
  gap: 6px;
  padding: 0 0 34px 40px;
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: 3px;
  top: 8px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--indigo);
  border: 2px solid var(--gold);
  transition: background var(--t-mid), border-color var(--t-mid), transform var(--t-mid);
}

.page-about .about-timeline__item--now::before {
  background: var(--brick);
  border-color: var(--brick);
}

.page-about .about-timeline__year {
  font-size: 1.5rem;
  color: var(--gold);
  letter-spacing: .06em;
}

.page-about .about-timeline__item--now .about-timeline__year {
  color: var(--brick);
}

.page-about .about-timeline__content h3 {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-weight: 800;
  margin: 0 0 6px;
  color: var(--warm);
}

.page-about .about-timeline__content p {
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(251, 247, 240, .78);
  max-width: 38em;
}

.page-about .tag {
  display: inline-block;
  margin-top: 12px;
  padding: 3px 12px;
  border-radius: var(--r-pill);
  font-size: 12px;
  font-family: var(--font-mono);
  letter-spacing: .1em;
}

.page-about .tag--live {
  color: var(--indigo);
  background: var(--celadon);
}

/* ---------- 引文 ---------- */
.page-about .about-quote {
  padding: clamp(56px, 9vw, 120px) 0;
  background: linear-gradient(135deg, var(--plum) 0%, var(--indigo-2) 82%);
}

.page-about .about-quote__inner {
  max-width: 900px;
}

.page-about .about-quote__block {
  position: relative;
  margin: 0;
  padding-left: clamp(28px, 5vw, 60px);
  border-left: 3px solid var(--brick);
}

.page-about .about-quote__mark {
  position: absolute;
  left: clamp(6px, 1.6vw, 18px);
  top: -16px;
  font-family: var(--font-serif);
  font-size: 3.2rem;
  line-height: 1;
  color: rgba(212, 162, 76, .45);
}

.page-about .about-quote__block p {
  font-family: var(--font-serif);
  font-weight: 800;
  font-size: clamp(1.25rem, 3vw, 2rem);
  line-height: 1.5;
  letter-spacing: -0.01em;
  margin: 0;
  color: var(--warm);
}

.page-about .about-quote__sign {
  margin: 22px 0 0 clamp(28px, 5vw, 60px);
  font-size: 13px;
  letter-spacing: .1em;
  color: rgba(251, 247, 240, .6);
}

/* ---------- 服务网络 ---------- */
.page-about .about-network {
  padding: var(--about-gap) 0;
  background: var(--indigo);
}

.page-about .about-network__grid {
  display: grid;
  gap: clamp(28px, 4vw, 52px);
  align-items: start;
}

.page-about .about-network__body .section-head {
  margin-bottom: 24px;
}

.page-about .about-network__figure {
  margin: 0;
  border-radius: var(--r-md);
  overflow: hidden;
  border: 1px solid rgba(212, 162, 76, .26);
}

.page-about .about-network__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
}

.page-about .about-network__figure .media-frame__caption {
  display: block;
  padding: 14px 18px;
  font-size: 14px;
  color: rgba(251, 247, 240, .7);
  background: rgba(27, 42, 79, .8);
}

.page-about .about-network__dots {
  list-style: none;
  margin: clamp(34px, 5vw, 56px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: rgba(212, 162, 76, .22);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .about-network__dot {
  display: flex;
  gap: 14px;
  align-items: baseline;
  padding: 18px 20px;
  background: var(--indigo-2);
  font-size: 15px;
  line-height: 1.7;
  color: rgba(251, 247, 240, .84);
  transition: background var(--t-fast), color var(--t-fast);
}

.page-about .about-network__dot:hover {
  background: #223258;
  color: var(--warm);
}

.page-about .about-network__dot .mono {
  flex: none;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--celadon);
}

/* ---------- 内容流程 ---------- */
.page-about .about-craft {
  padding: var(--about-gap) 0;
  background: var(--paper);
  color: var(--ink);
}

.page-about .about-craft .section-title,
.page-about .about-craft .section-num {
  color: var(--ink);
}

.page-about .about-craft .section-num {
  color: var(--brick);
}

.page-about .about-craft .lead {
  color: rgba(42, 46, 54, .76);
}

.page-about .about-craft__grid {
  display: grid;
  gap: clamp(30px, 4vw, 52px);
  margin-bottom: clamp(36px, 5vw, 60px);
}

.page-about .about-craft__steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 24px;
  counter-reset: craft;
}

.page-about .about-craft__step {
  position: relative;
  padding-left: 22px;
  border-left: 1px solid rgba(178, 58, 46, .32);
}

.page-about .about-craft__step-num {
  display: block;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--brick);
  margin-bottom: 6px;
}

.page-about .about-craft__step h3 {
  font-family: var(--font-serif);
  font-weight: 800;
  font-size: 1.2rem;
  margin: 0 0 6px;
  color: var(--ink);
}

.page-about .about-craft__step p {
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(42, 46, 54, .8);
}

.page-about .about-craft__figure {
  margin: 0;
  border-radius: var(--r-md);
  overflow: hidden;
  border: 1px solid rgba(42, 46, 54, .12);
}

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

.page-about .about-craft__figure .media-frame__caption {
  display: block;
  padding: 14px 18px;
  font-size: 14px;
  color: rgba(42, 46, 54, .7);
  background: var(--mist);
}

.page-about .about-craft__volume {
  display: grid;
  gap: 20px;
  padding: clamp(24px, 3vw, 34px);
  border-radius: var(--r-md);
  background: linear-gradient(180deg, #EDE6D8, var(--paper));
  border-top: 3px solid var(--gold);
}

.page-about .about-craft__volume-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .about-craft__volume-num {
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  color: var(--brick);
  letter-spacing: .04em;
}

.page-about .about-craft__volume-label {
  font-size: 14px;
  color: rgba(42, 46, 54, .74);
}

.page-about .about-craft__tail {
  margin: 26px 0 0;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(42, 46, 54, .8);
  max-width: 40em;
}

.page-about .about-craft__tail .about-network__link {
  color: var(--brick);
  border-color: rgba(178, 58, 46, .45);
}

.page-about .about-craft__tail .about-network__link:hover,
.page-about .about-craft__tail .about-network__link:focus-visible {
  color: var(--indigo);
  border-color: var(--indigo);
}

/* ---------- 荣誉 ---------- */
.page-about .about-honor {
  padding: var(--about-gap) 0;
  background: linear-gradient(180deg, var(--indigo), var(--plum));
}

.page-about .about-honor__grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  align-items: start;
}

.page-about .about-honor__seal {
  width: 84px;
  height: 84px;
  display: grid;
  place-items: center;
  border-radius: var(--r-sm);
  background: var(--brick);
  box-shadow: inset 0 0 0 1px rgba(251, 247, 240, .32);
}

.page-about .about-honor__seal-char {
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: 2rem;
  color: var(--warm);
}

.page-about .about-honor__body .section-head {
  margin-bottom: 24px;
}

.page-about .about-honor__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 22px;
}

.page-about .about-honor__item {
  padding-left: 20px;
  border-left: 2px solid var(--gold);
}

.page-about .about-honor__year {
  display: block;
  font-size: 1.4rem;
  color: var(--gold);
  margin-bottom: 6px;
}

.page-about .about-honor__item p {
  margin: 0;
  font-size: 16px;
  line-height: 1.85;
  color: rgba(251, 247, 240, .84);
  max-width: 42em;
}

/* ---------- 合作 ---------- */
.page-about .about-partners {
  padding: var(--about-gap) 0;
  background: var(--indigo);
}

.page-about .about-partners .section-head {
  margin-bottom: clamp(30px, 4vw, 50px);
}

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

.page-about .about-partners__card {
  padding: clamp(24px, 3vw, 32px);
  border-radius: var(--r-md);
}

.page-about .about-partners__card h3 {
  font-family: var(--font-serif);
  font-weight: 800;
  font-size: 1.25rem;
  margin: 0 0 10px;
  color: var(--warm);
}

.page-about .about-partners__card p {
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(251, 247, 240, .82);
}

.page-about .about-partners__cta {
  margin-top: clamp(30px, 4vw, 48px);
  padding: clamp(24px, 3vw, 32px);
  border-radius: var(--r-md);
  border: 1px dashed rgba(212, 162, 76, .45);
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  align-items: center;
  justify-content: space-between;
}

.page-about .about-partners__cta p {
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(251, 247, 240, .84);
  max-width: 40em;
}

/* ---------- 联系 ---------- */
.page-about .about-contact {
  padding: clamp(48px, 7vw, 96px) 0 var(--about-gap);
  background: linear-gradient(180deg, var(--indigo), var(--indigo-2));
}

.page-about .about-contact__inner {
  display: grid;
  gap: clamp(28px, 4vw, 52px);
  align-items: start;
}

.page-about .about-contact__body .section-head {
  margin-bottom: 20px;
}

.page-about .about-contact__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .about-contact__list li {
  display: grid;
  gap: 4px;
  padding: 16px 20px;
  border-radius: var(--r-sm);
  background: rgba(27, 42, 79, .8);
  border: 1px solid rgba(212, 162, 76, .22);
  font-size: 15px;
  line-height: 1.7;
  color: rgba(251, 247, 240, .88);
}

.page-about .about-contact__list .mono {
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--gold);
}

.page-about .about-contact__list a {
  color: var(--warm);
  text-decoration: none;
  border-bottom: 1px solid rgba(212, 162, 76, .45);
  transition: color var(--t-fast), border-color var(--t-fast);
}

.page-about .about-contact__list a:hover,
.page-about .about-contact__list a:focus-visible {
  color: var(--gold);
  border-color: var(--gold);
}

/* ---------- 平板 ---------- */
@media (min-width: 720px) {
  .page-about .about-facts {
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }

  .page-about .about-network__dots {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .page-about .about-partners__cols {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-about .about-partners__card:first-child {
    grid-column: span 2;
  }

  .page-about .about-timeline__list {
    padding-left: 8px;
  }

  .page-about .about-timeline__item {
    grid-template-columns: 120px 1fr;
    gap: 28px;
    padding-left: 52px;
    align-items: start;
  }

  .page-about .about-timeline__year {
    font-size: 1.75rem;
    text-align: right;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 1024px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: center;
  }

  .page-about .about-hero__seal {
    display: grid;
    justify-self: end;
    place-items: center;
    gap: 10px;
    width: clamp(180px, 18vw, 240px);
    aspect-ratio: 1 / 1;
    border-radius: var(--r-lg);
    background: linear-gradient(150deg, rgba(178, 58, 46, .9), rgba(74, 59, 107, .9));
    border: 1px solid rgba(212, 162, 76, .5);
    transform: rotate(-4deg);
  }

  .page-about .about-hero__seal-char {
    font-family: var(--font-serif);
    font-weight: 900;
    font-size: clamp(3rem, 6vw, 4.4rem);
    color: var(--warm);
    line-height: 1;
  }

  .page-about .about-hero__seal-num {
    font-size: 14px;
    letter-spacing: .18em;
    color: var(--mist);
  }

  .page-about .about-hero__seal-num small {
    font-size: 11px;
    margin-left: 2px;
  }

  .page-about .about-center__grid {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: clamp(32px, 4vw, 64px);
  }

  .page-about .about-center__rail {
    flex-direction: column;
    align-items: flex-start;
    gap: 18px;
    padding-top: 8px;
  }

  .page-about .about-center__rail-line {
    width: 1px;
    flex: 1 1 auto;
    min-height: 180px;
    background: linear-gradient(180deg, var(--gold), transparent);
  }

  .page-about .about-center__body {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    column-gap: clamp(32px, 4vw, 60px);
    align-items: start;
  }

  .page-about .about-center__body .section-head {
    grid-column: 1 / -1;
  }

  .page-about .about-center__body .prose + .prose {
    margin-top: 0;
  }

  .page-about .about-facts {
    grid-column: 1 / -1;
  }

  .page-about .about-network__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: clamp(36px, 5vw, 68px);
    align-items: center;
  }

  .page-about .about-network__dots {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-about .about-craft__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: clamp(36px, 5vw, 64px);
    align-items: start;
  }

  .page-about .about-craft__figure {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }

  .page-about .about-honor__grid {
    grid-template-columns: auto minmax(0, 1fr);
    gap: clamp(32px, 4vw, 64px);
  }

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

  .page-about .about-partners__card:first-child {
    grid-column: span 1;
  }

  .page-about .about-contact__inner {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    gap: clamp(36px, 5vw, 70px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-timeline__item::before {
    transition: none;
  }
}