.page-about {
  --about-wash: rgba(237, 231, 218, .05);
  --about-tile-blue: rgba(30, 90, 168, .32);
  background: var(--ink);
  color: var(--paper);
  overflow-x: clip;
}

.page-about .section__label {
  color: var(--gold-lit);
  letter-spacing: .16em;
  margin: 0 0 14px;
}

.page-about .section__title {
  color: var(--paper);
  margin: 0;
  line-height: 1.18;
}

.page-about .breadcrumbs__link {
  color: var(--mist);
}

.page-about .breadcrumbs__current {
  color: var(--gold-lit);
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .12em;
}

.page-about .about-lede {
  max-width: 68ch;
  margin: 18px 0 0;
  color: var(--mist);
  font-size: 1.03rem;
  line-height: 1.82;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: 32px 0 76px;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -40px;
  right: 0;
  width: min(52vw, 640px);
  height: 420px;
  background: radial-gradient(62% 62% at 72% 22%, rgba(176, 138, 62, .22), transparent 72%);
  pointer-events: none;
}

.page-about .about-hero__grid {
  position: relative;
  display: grid;
  gap: 40px;
}

.page-about .about-hero__tag {
  margin: 0 0 20px;
  font-size: .76rem;
  letter-spacing: .18em;
  color: var(--gold-lit);
  text-transform: uppercase;
}

.page-about .about-hero__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2.3rem, 6.2vw, 4.6rem);
  line-height: 1.04;
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-about .about-hero__deck {
  margin: 24px 0 0;
  max-width: 58ch;
  color: var(--mist);
  font-size: 1.05rem;
  line-height: 1.85;
}

.page-about .about-hero__stats {
  list-style: none;
  margin: 32px 0 0;
  padding: 22px 0 0;
  border-top: 2px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  gap: 22px 40px;
}

.page-about .about-hero__stats li {
  display: grid;
  gap: 6px;
}

.page-about .stat-num {
  font-size: 1.95rem;
  line-height: 1;
  color: var(--gold-lit);
  letter-spacing: .04em;
}

.page-about .about-hero__stats em {
  font-style: normal;
  font-size: .78rem;
  letter-spacing: .1em;
  color: var(--mist);
}

.page-about .about-hero__media {
  border: 2px solid var(--line);
  background: var(--ink-deep);
  box-shadow: var(--shadow-hard);
}

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

.page-about .about-hero__media .media-frame__caption {
  color: var(--gold-lit);
  font-size: .78rem;
  letter-spacing: .06em;
  padding: 12px 4px 0;
}

/* ---------- 沿革时间线 ---------- */
.page-about .about-chronicle {
  padding: 72px 0;
  background: linear-gradient(180deg, rgba(7, 28, 23, .55), transparent 70%);
}

.page-about .chronicle {
  position: relative;
  list-style: none;
  margin: 44px 0 0;
  padding: 0 0 0 42px;
  display: grid;
  gap: 18px;
}

.page-about .chronicle::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg, var(--gold) 0%, var(--record) 100%);
}

.page-about .chronicle__node {
  position: relative;
}

.page-about .chronicle__mark {
  position: absolute;
  left: -42px;
  top: 22px;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 2px solid var(--gold);
  background: var(--ink);
}

.page-about .chronicle__node--current .chronicle__mark {
  border-color: var(--neon);
  box-shadow: 0 0 0 5px rgba(255, 59, 78, .14);
}

.page-about .chronicle__body {
  border: 2px solid var(--line-soft);
  background: linear-gradient(150deg, rgba(11, 43, 36, .92), rgba(7, 28, 23, .94));
  transition: border-color .3s var(--ease);
}

.page-about .chronicle__body[open] {
  border-color: var(--gold);
}

.page-about .chronicle__summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 16px;
  padding: 20px 22px;
}

.page-about .chronicle__summary::-webkit-details-marker {
  display: none;
}

.page-about .chronicle__summary::marker {
  content: "";
}

.page-about .chronicle__when {
  flex: 0 0 auto;
  font-size: .76rem;
  letter-spacing: .16em;
  color: var(--gold-lit);
  border: 1px solid var(--line);
  padding: 4px 10px;
}

.page-about .chronicle__title {
  margin: 0;
  flex: 1 1 12ch;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.1rem, 2.4vw, 1.42rem);
  color: var(--paper);
}

.page-about .chronicle__toggle {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: .95rem;
  color: var(--gold-lit);
  min-width: 1.2em;
  text-align: right;
}

.page-about .chronicle__toggle::after {
  content: "＋";
}

.page-about .chronicle__body[open] .chronicle__toggle::after {
  content: "－";
}

.page-about .chronicle__detail {
  margin: 0 22px 22px;
  padding-top: 16px;
  border-top: 1px dashed var(--line-soft);
  color: var(--mist);
  font-size: .96rem;
  line-height: 1.82;
}

.page-about .chronicle__detail p {
  margin: 0;
}

.page-about .chronicle__note {
  margin-top: 12px;
  padding-left: 14px;
  border-left: 3px solid var(--tile-blue);
  font-size: .84rem;
  color: var(--record);
  line-height: 1.7;
}

/* ---------- 三条业务线 ---------- */
.page-about .about-lines {
  padding: 72px 0;
}

.page-about .lines {
  margin-top: 40px;
  display: grid;
  gap: 20px;
}

.page-about .line {
  display: grid;
  gap: 12px;
  align-content: start;
  padding: 26px 22px 28px;
  background: var(--about-wash);
  border-top: 4px solid var(--gold);
  border-right: 2px solid var(--line-soft);
  border-bottom: 2px solid var(--line-soft);
  border-left: 2px solid var(--line-soft);
}

.page-about .line--blue {
  border-top-color: var(--tile-blue);
}

.page-about .line--record {
  border-top-color: var(--record);
}

.page-about .line__num {
  font-size: .8rem;
  letter-spacing: .18em;
  color: var(--gold-lit);
}

.page-about .line__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.24rem;
  color: var(--paper);
}

.page-about .line p {
  margin: 0;
  color: var(--mist);
  font-size: .96rem;
  line-height: 1.78;
}

.page-about .line p.line__fact {
  margin-top: 6px;
  padding-top: 14px;
  border-top: 1px dashed var(--line-soft);
  color: var(--gold-lit);
  font-size: .78rem;
  letter-spacing: .1em;
}

/* ---------- 分类体系 ---------- */
.page-about .about-taxonomy {
  padding: 72px 0 76px;
}

.page-about .taxonomy-band {
  position: relative;
  margin: 44px 0 0;
  background: var(--ink-deep);
  border-top: 2px solid var(--line);
  border-bottom: 2px solid var(--line);
  overflow: hidden;
}

.page-about .taxonomy-band img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 400px;
  object-fit: cover;
  opacity: .45;
  filter: saturate(.7) contrast(1.05);
}

.page-about .taxonomy-band figcaption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 20px 24px;
  background: linear-gradient(0deg, rgba(7, 28, 23, .94), transparent);
  color: var(--gold-lit);
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .12em;
}

.page-about .taxonomy-grid {
  list-style: none;
  margin: 32px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

.page-about .taxonomy-card {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  display: grid;
  gap: 10px;
  align-content: start;
  padding: 22px 20px 20px;
  background: var(--paper);
  color: var(--graphite);
  border: 2px solid var(--gold);
  box-shadow: var(--shadow-soft);
  transition: transform .3s var(--ease), box-shadow .3s var(--ease);
}

.page-about .taxonomy-card::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image: radial-gradient(circle at 7px 7px, var(--about-tile-blue) 1.5px, transparent 1.6px);
  background-size: 20px 20px;
  opacity: .16;
}

.page-about .taxonomy-card:hover,
.page-about .taxonomy-card:focus-within {
  transform: translate(-3px, -3px);
  box-shadow: 12px 12px 0 rgba(0, 0, 0, .5);
}

.page-about .taxonomy-card__name {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.3rem;
  color: var(--graphite);
}

.page-about .taxonomy-card__desc {
  margin: 0;
  font-size: .93rem;
  line-height: 1.72;
  color: #4A524C;
}

.page-about .taxonomy-card__meta {
  margin: 4px 0 0;
  padding-top: 12px;
  border-top: 1px dashed rgba(176, 138, 62, .55);
  font-size: .73rem;
  letter-spacing: .08em;
  color: #7A6A45;
  transition: color .28s var(--ease);
}

.page-about .taxonomy-card:hover .taxonomy-card__meta,
.page-about .taxonomy-card:focus-within .taxonomy-card__meta {
  color: #A8121F;
}

/* ---------- 季度流程 ---------- */
.page-about .about-cycle {
  padding: 72px 0;
  background: linear-gradient(180deg, transparent, rgba(7, 28, 23, .6) 40%, transparent);
}

.page-about .cycle {
  margin-top: 40px;
  display: grid;
  gap: 0;
}

.page-about .cycle__step {
  position: relative;
  padding: 24px 18px 24px 0;
  border-top: 2px dashed var(--line-soft);
}

.page-about .cycle__num {
  display: inline-block;
  font-size: 1.5rem;
  letter-spacing: .06em;
  color: var(--gold-lit);
}

.page-about .cycle__title {
  margin: 10px 0 8px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--paper);
}

.page-about .cycle__step p {
  margin: 0;
  color: var(--mist);
  font-size: .93rem;
  line-height: 1.76;
}

.page-about .cycle__step:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 4px;
}

.page-about .cycle__foot {
  margin: 34px 0 0;
  padding: 18px 22px;
  border-left: 4px solid var(--neon);
  background: var(--about-wash);
  color: var(--paper);
  font-size: .96rem;
  line-height: 1.82;
}

/* ---------- 厂商合作 ---------- */
.page-about .about-partner {
  padding: 72px 0;
}

.page-about .partner__grid {
  margin-top: 40px;
  display: grid;
  gap: 32px;
}

.page-about .partner-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
  counter-reset: step;
}

.page-about .partner-steps li {
  position: relative;
  counter-increment: step;
  padding: 20px 22px 20px 64px;
  border: 2px solid var(--line-soft);
  background: rgba(7, 28, 23, .6);
  color: var(--mist);
  font-size: .95rem;
  line-height: 1.76;
}

.page-about .partner-steps li::before {
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 18px;
  top: 20px;
  font-family: var(--font-mono);
  font-size: .88rem;
  letter-spacing: .06em;
  color: var(--gold-lit);
}

.page-about .partner-steps li + li::after {
  content: "";
  position: absolute;
  left: 28px;
  top: -14px;
  width: 2px;
  height: 14px;
  background: repeating-linear-gradient(180deg, var(--gold) 0 4px, transparent 4px 8px);
}

.page-about .partner-rights {
  padding: 26px 24px 28px;
  border: 2px solid var(--gold);
  background: linear-gradient(160deg, rgba(176, 138, 62, .14), rgba(7, 28, 23, .92));
}

.page-about .partner-rights h3 {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.22rem;
  color: var(--paper);
}

.page-about .partner-rights ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .partner-rights li {
  position: relative;
  padding-left: 24px;
  color: var(--mist);
  font-size: .94rem;
  line-height: 1.76;
}

.page-about .partner-rights li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .58em;
  width: 10px;
  height: 10px;
  border: 2px solid var(--gold-lit);
  transform: rotate(45deg);
}

.page-about .partner-rights strong {
  color: var(--paper);
  font-weight: 600;
}

.page-about .partner__note {
  margin: 20px 0 0;
  padding-top: 16px;
  border-top: 1px dashed var(--line);
  color: var(--mist);
  font-size: .87rem;
  line-height: 1.75;
}

.page-about .partner__note a {
  color: var(--gold-lit);
  border-bottom: 1px solid var(--line);
  text-decoration: none;
}

.page-about .partner__note a:hover {
  color: var(--neon);
  border-bottom-color: var(--neon);
}

/* ---------- 团队与数据 ---------- */
.page-about .about-team {
  padding: 72px 0;
}

.page-about .about-team__grid {
  display: grid;
  gap: 44px;
}

.page-about .about-team__main p {
  max-width: 62ch;
  color: var(--mist);
  font-size: .99rem;
  line-height: 1.84;
}

.page-about .team-roll {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 4px;
}

.page-about .team-roll li {
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 14px;
  align-items: baseline;
  padding: 14px 0;
  border-bottom: 1px dashed var(--line-soft);
  color: var(--mist);
  font-size: .95rem;
  line-height: 1.74;
}

.page-about .team-roll__num {
  font-size: 1.45rem;
  line-height: 1;
  color: var(--gold-lit);
}

.page-about .team-roll strong {
  color: var(--paper);
  font-weight: 600;
}

.page-about .about-team__media {
  border: 2px solid var(--line);
  background: var(--ink-deep);
  box-shadow: var(--shadow-hard);
}

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

.page-about .gauge {
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2px;
  background: var(--line-soft);
  border: 2px solid var(--line);
}

.page-about .gauge__item {
  background: var(--ink-deep);
  padding: 18px 16px 20px;
}

.page-about .gauge dt {
  margin-bottom: 8px;
  font-size: .72rem;
  letter-spacing: .14em;
  color: var(--mist);
}

.page-about .gauge dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 1.85rem;
  line-height: 1;
  letter-spacing: .04em;
  color: var(--gold-lit);
}

.page-about .gauge dd span {
  margin-left: 4px;
  font-size: .68rem;
  letter-spacing: .1em;
  color: var(--mist);
}

/* ---------- 外部反馈 ---------- */
.page-about .about-honors {
  padding: 56px 0;
  background: var(--ink-deep);
  border-top: 2px solid var(--line);
  border-bottom: 2px solid var(--line);
}

.page-about .about-honors__title {
  margin: 0 0 24px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.4rem, 3vw, 2rem);
  color: var(--paper);
}

.page-about .honors {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .honors li {
  display: flex;
  gap: 14px;
  align-items: baseline;
  padding: 18px 20px;
  border: 2px solid var(--line-soft);
  background: var(--about-wash);
  color: var(--mist);
  font-size: .92rem;
  line-height: 1.72;
}

.page-about .honors .mono {
  flex: 0 0 auto;
  font-size: .78rem;
  letter-spacing: .16em;
  color: var(--gold-lit);
}

/* ---------- 收尾入口 ---------- */
.page-about .about-next {
  padding: 72px 0 88px;
}

.page-about .about-next__grid {
  display: grid;
  gap: 32px;
}

.page-about .about-next h2 {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.6rem, 3.4vw, 2.4rem);
  line-height: 1.2;
  color: var(--paper);
}

.page-about .about-next p {
  margin: 0;
  max-width: 52ch;
  color: var(--mist);
  font-size: .99rem;
  line-height: 1.85;
}

.page-about .about-next__links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-next__links .btn {
  width: 100%;
  text-align: center;
}

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

  .page-about .about-next__links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 780px) {
  .page-about .cycle {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .cycle__step {
    padding: 30px 22px 0 0;
    border-top: 0;
  }

  .page-about .cycle__step::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 16px;
    height: 3px;
    background: repeating-linear-gradient(90deg, var(--gold) 0 10px, transparent 10px 20px);
  }

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

@media (min-width: 900px) {
  .page-about .about-hero {
    padding: 48px 0 96px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 60px;
    align-items: end;
  }

  .page-about .about-next__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    gap: 56px;
    align-items: center;
  }

  .page-about .partner__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 48px;
  }
}

@media (min-width: 960px) {
  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 56px;
    align-items: start;
  }
}

@media (min-width: 1024px) {
  .page-about .about-chronicle,
  .page-about .about-lines,
  .page-about .about-taxonomy,
  .page-about .about-cycle,
  .page-about .about-partner,
  .page-about .about-team {
    padding-top: 104px;
    padding-bottom: 104px;
  }

  .page-about .lines {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
  }

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

@media (max-width: 400px) {
  .page-about .chronicle {
    padding-left: 30px;
  }

  .page-about .chronicle::before {
    left: 8px;
  }

  .page-about .chronicle__mark {
    left: -30px;
    width: 18px;
    height: 18px;
  }

  .page-about .chronicle__summary {
    padding: 16px 16px;
  }

  .page-about .chronicle__detail {
    margin: 0 16px 18px;
  }

  .page-about .partner-steps li {
    padding: 18px 16px 18px 52px;
  }

  .page-about .partner-steps li::before {
    left: 14px;
    top: 18px;
  }

  .page-about .partner-steps li + li::after {
    left: 22px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about * {
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
  }

  .page-about .taxonomy-card:hover,
  .page-about .taxonomy-card:focus-within {
    transform: none;
  }
}