.page-about {
  --about-rail: 96px;
  --about-line-x: 7px;
  position: relative;
  background-color: var(--c-field);
  color: var(--c-paper);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  padding-block: clamp(80px, 11vw, 150px) clamp(48px, 6vw, 84px);
  border-bottom: 1px solid var(--c-line);
}

.page-about .about-hero__media {
  position: absolute;
  inset: 0;
  z-index: -2;
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 38%;
  opacity: 0.3;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(180deg, rgba(11, 61, 46, 0.68) 0%, rgba(11, 61, 46, 0.9) 58%, var(--c-field) 100%),
    repeating-linear-gradient(90deg, rgba(22, 52, 43, 0.55) 0 1px, transparent 1px var(--bp-size));
}

.page-about .about-hero__inner {
  display: flow-root;
}

.page-about .crumbs__link,
.page-about .crumbs__current {
  color: var(--c-mute);
}

.page-about .crumbs__link:hover {
  color: var(--c-teal);
}

.page-about .crumbs__sep {
  color: var(--c-line);
}

.page-about .about-hero__kicker {
  margin: clamp(28px, 4vw, 44px) 0 14px;
  font-family: var(--font-num);
  font-size: var(--fs-note);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--c-teal);
}

.page-about .about-hero__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(38px, 8.4vw, 86px);
  line-height: 1.02;
  letter-spacing: -0.5px;
  color: var(--c-white);
}

.page-about .about-hero__lede {
  max-width: 40em;
  margin: clamp(22px, 3vw, 34px) 0 0;
  color: var(--c-paper);
}

.page-about .about-hero__facts {
  margin: clamp(40px, 6vw, 72px) 0 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background-color: var(--c-line);
  border: 1px solid var(--c-line);
}

.page-about .about-hero__facts > div {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px 18px;
  background-color: var(--c-field);
}

.page-about .about-hero__facts dt {
  font-size: var(--fs-note);
  letter-spacing: 0.08em;
  color: var(--c-mute);
}

.page-about .about-hero__facts dd {
  margin: 0;
  font-family: var(--font-num);
  font-size: clamp(22px, 3.4vw, 32px);
  font-weight: 700;
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
  color: var(--c-white);
}

/* ---------- 时间线 ---------- */
.page-about .about-line__intro {
  margin-bottom: clamp(32px, 5vw, 52px);
}

.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 30px;
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: var(--about-line-x);
  top: 10px;
  bottom: 18px;
  width: 1px;
  background: linear-gradient(to bottom, transparent 0%, var(--c-line) 6%, var(--c-line) 94%, transparent 100%);
}

.page-about .about-timeline__item {
  position: relative;
  padding-bottom: clamp(20px, 3vw, 30px);
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -29px;
  top: 9px;
  width: 13px;
  height: 13px;
  background-color: var(--c-field);
  border: 1px solid var(--c-teal);
  clip-path: polygon(0 0, 100% 0, 100% 58%, 58% 100%, 0 100%);
  transition: background-color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-timeline__item:hover::before {
  background-color: var(--c-orange);
  border-color: var(--c-orange);
}

.page-about .about-timeline__year {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 26px;
  line-height: 1;
  letter-spacing: -0.5px;
  color: var(--c-teal);
}

.page-about .about-timeline__body {
  border-top: 1px solid var(--c-line);
}

.page-about .about-timeline__body > summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 0;
  list-style: none;
  cursor: pointer;
  color: var(--c-paper);
  transition: color var(--dur) var(--ease);
}

.page-about .about-timeline__body > summary::-webkit-details-marker {
  display: none;
}

.page-about .about-timeline__body > summary:hover {
  color: var(--c-teal);
}

.page-about .about-timeline__sum {
  font-size: var(--fs-h3);
  font-weight: 600;
  line-height: 1.4;
}

.page-about .about-timeline__mark {
  position: relative;
  flex: none;
  width: 16px;
  height: 16px;
}

.page-about .about-timeline__mark::before,
.page-about .about-timeline__mark::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 0;
  width: 16px;
  height: 1px;
  background-color: var(--c-teal);
  transition: transform var(--dur) var(--ease);
}

.page-about .about-timeline__mark::after {
  transform: rotate(90deg);
}

.page-about .about-timeline__body[open] .about-timeline__mark::after {
  transform: rotate(90deg) scaleX(0);
}

.page-about .about-timeline__text {
  margin: 0 0 18px;
  max-width: 38em;
  color: var(--c-mute);
}

/* ---------- 团队角色 ---------- */
.page-about .about-roles__grid {
  display: grid;
  gap: var(--about-rail);
  gap: clamp(24px, 3.4vw, 44px);
}

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

.page-about .about-roles__media {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--c-line);
  background-color: var(--c-ink);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%);
}

.page-about .about-roles__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  opacity: 0.85;
}

.page-about .about-roles__figure .note {
  display: block;
  margin-top: 12px;
  color: var(--c-mute);
}

.page-about .about-roles__list {
  display: grid;
  gap: 14px;
}

.page-about .about-role {
  position: relative;
  padding: 24px 22px;
  background-color: var(--c-field-deep);
  transition: box-shadow var(--dur) var(--ease);
}

.page-about .about-role:hover {
  box-shadow: inset 0 0 0 1px var(--c-teal);
}

.page-about .about-role__idx {
  display: block;
  margin-bottom: 10px;
  color: var(--c-orange);
}

.page-about .about-role__name {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-h3);
  letter-spacing: -0.2px;
  color: var(--c-white);
}

.page-about .about-role__text {
  margin: 0;
  max-width: 34em;
  font-size: var(--fs-sm);
  color: var(--c-mute);
}

.page-about .about-roles__more {
  margin: clamp(28px, 4vw, 44px) 0 0;
  max-width: 40em;
  font-size: var(--fs-sm);
  color: var(--c-mute);
}

.page-about .about-roles__more a {
  color: var(--c-teal);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-roles__more a:hover {
  color: var(--c-orange);
}

/* ---------- 更新节奏 ---------- */
.page-about .about-flow__intro {
  margin-bottom: clamp(28px, 4vw, 44px);
}

.page-about .about-flow__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background-color: var(--c-line);
  border: 1px solid var(--c-line);
}

.page-about .about-flow__item {
  background-color: var(--c-field);
  padding: 26px 22px 30px;
  position: relative;
}

.page-about .about-flow__item::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 46px;
  height: 2px;
  background-color: var(--c-teal);
}

.page-about .about-flow__no {
  display: block;
  margin-bottom: 12px;
  color: var(--c-mute);
}

.page-about .about-flow__name {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(22px, 3vw, 28px);
  letter-spacing: -0.4px;
  color: var(--c-white);
}

.page-about .about-flow__text {
  margin: 0;
  max-width: 32em;
  font-size: var(--fs-sm);
  color: var(--c-mute);
}

/* ---------- 数据带 ---------- */
.page-about .about-band {
  position: relative;
  isolation: isolate;
  padding-block: clamp(64px, 9vw, 112px);
  border-block: 1px solid var(--c-line);
  background-color: var(--c-field-deep);
  overflow: hidden;
}

.page-about .about-band__bg {
  position: absolute;
  inset: 0;
  z-index: -2;
}

.page-about .about-band__bg img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.22;
}

.page-about .about-band::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(115deg, rgba(7, 42, 32, 0.94) 0%, rgba(7, 42, 32, 0.7) 55%, rgba(7, 42, 32, 0.9) 100%);
}

.page-about .about-band__stats {
  margin: clamp(28px, 4vw, 44px) 0 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px 20px;
}

.page-about .about-band__stat {
  border-left: 1px solid var(--c-line);
  padding-left: 16px;
}

.page-about .about-band__stat dt {
  font-size: var(--fs-note);
  letter-spacing: 0.08em;
  color: var(--c-mute);
}

.page-about .about-band__stat dd {
  margin: 8px 0 0;
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.page-about .about-band__num {
  display: inline-block;
  font-family: var(--font-num);
  font-weight: 700;
  font-size: clamp(38px, 7.6vw, 68px);
  line-height: 1;
  letter-spacing: -1px;
  font-variant-numeric: tabular-nums;
  color: var(--c-white);
}

.page-about .about-band__unit {
  font-size: var(--fs-sm);
  color: var(--c-teal);
}

.page-about .about-band__stat.is-in .about-band__num {
  animation: about-pulse 620ms var(--ease) both;
}

@keyframes about-pulse {
  0% { transform: scale(1); }
  48% { transform: scale(1.05); }
  100% { transform: scale(1); }
}

.page-about .about-band__note {
  margin: clamp(28px, 4vw, 44px) 0 0;
  max-width: 46em;
  font-size: var(--fs-sm);
  color: var(--c-mute);
}

.page-about .about-band__note a {
  color: var(--c-teal);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-band__note a:hover {
  color: var(--c-orange);
}

/* ---------- 长期跟队 ---------- */
.page-about .about-follow__grid {
  display: grid;
  gap: clamp(28px, 4vw, 48px);
}

.page-about .about-follow__lead .prose {
  margin-bottom: 1em;
}

.page-about .about-follow__steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background-color: var(--c-line);
  border: 1px solid var(--c-line);
  align-content: start;
}

.page-about .about-follow__step {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding: 16px 18px;
  background-color: var(--c-field);
}

.page-about .about-follow__no {
  color: var(--c-orange);
  padding-top: 3px;
}

.page-about .about-follow__step p {
  margin: 0;
  font-size: var(--fs-sm);
  color: var(--c-paper);
}

/* ---------- 联系 ---------- */
.page-about .about-touch__panel {
  padding: clamp(28px, 4.5vw, 56px);
  background-color: var(--c-field-deep);
}

.page-about .about-touch__panel .prose {
  margin-bottom: clamp(24px, 3.4vw, 36px);
}

.page-about .about-touch__list {
  margin: 0;
  display: grid;
  gap: 1px;
  background-color: var(--c-line);
  border: 1px solid var(--c-line);
}

.page-about .about-touch__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 14px 16px;
  background-color: var(--c-field);
}

.page-about .about-touch__row dt {
  font-size: var(--fs-note);
  letter-spacing: 0.08em;
  color: var(--c-mute);
}

.page-about .about-touch__row dd {
  margin: 0;
  font-size: var(--fs-body);
  color: var(--c-white);
  word-break: break-word;
}

.page-about .about-touch__row dd a {
  color: var(--c-paper);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-touch__row dd a:hover {
  color: var(--c-teal);
}

.page-about .about-touch__note {
  margin: 20px 0 0;
  max-width: 44em;
  color: var(--c-mute);
}

.page-about .about-touch__cta {
  margin: clamp(24px, 3.4vw, 36px) 0 0;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

  .page-about .about-touch__row {
    grid-template-columns: 132px minmax(0, 1fr);
    align-items: baseline;
    gap: 16px;
  }
}

@media (min-width: 760px) {
  .page-about .about-timeline {
    padding-left: 40px;
  }

  .page-about .about-timeline__item {
    display: grid;
    grid-template-columns: 108px minmax(0, 1fr);
    gap: 0 32px;
    align-items: start;
  }

  .page-about .about-timeline__item::before {
    left: -39px;
  }

  .page-about .about-timeline__year {
    margin-bottom: 0;
    font-size: 34px;
    text-align: right;
    padding-top: 12px;
  }
}

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

  .page-about .about-follow__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }

  .page-about .about-line__intro,
  .page-about .about-flow__intro {
    max-width: 46em;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-band__stat.is-in .about-band__num {
    animation: none;
  }
}