.page-about {
  --about-rail: 240px;
  --about-gap-lg: 64px;
  position: relative;
  overflow-x: clip;
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumbs {
  padding-top: 24px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: 40px 0 64px;
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(107, 77, 246, .30), transparent 62%),
    radial-gradient(90% 70% at 0% 12%, rgba(0, 233, 212, .12), transparent 66%);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  right: -8%;
  bottom: 6%;
  width: min(520px, 66vw);
  height: 180px;
  background: linear-gradient(102deg, rgba(142, 31, 63, .62), rgba(142, 31, 63, 0) 78%);
  transform: skewY(-9deg);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 44px;
}

.page-about .about-hero__title {
  font-size: clamp(38px, 7.4vw, 84px);
  line-height: 1.02;
  letter-spacing: -.035em;
  font-weight: 200;
  margin: 16px 0 0;
  max-width: 14ch;
  overflow-wrap: anywhere;
}

.page-about .about-hero__lede {
  margin: 24px 0 0;
  max-width: 46ch;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.page-about .about-hero__media {
  margin: 40px 0 0;
}

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

/* ---------- 章节索引 ---------- */
.page-about .about-index {
  padding: 26px 22px 22px;
  border-radius: var(--radius-lg);
}

.page-about .about-index__eyebrow {
  margin: 0 0 18px;
  font-size: 11px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-about .about-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-index__item + .about-index__item {
  margin-top: 2px;
}

.page-about .about-index__link {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 11px 10px 11px 0;
  color: var(--text-soft);
  text-decoration: none;
  font-size: 15px;
  line-height: 1.4;
  transition: color var(--dur) var(--ease), padding-left var(--dur) var(--ease);
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  color: var(--cyan);
  padding-left: 6px;
}

.page-about .about-index__num {
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--muted);
  flex: 0 0 auto;
}

.page-about .about-index__foot {
  margin: 20px 0 0;
  padding-top: 16px;
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

/* ---------- 章节骨架 ---------- */
.page-about .about-chapter {
  position: relative;
  padding: 56px 0;
}

.page-about .about-chapter + .about-chapter::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--glass-line), transparent 72%);
}

.page-about .about-chapter--violet {
  background: linear-gradient(118deg, rgba(107, 77, 246, .18), rgba(58, 107, 255, .07) 46%, transparent 76%);
}

.page-about .about-chapter--wine {
  background: linear-gradient(118deg, rgba(142, 31, 63, .26), rgba(142, 31, 63, .05) 58%, transparent 82%);
}

.page-about .about-chapter__inner {
  display: grid;
  gap: 26px;
}

.page-about .about-chapter__title {
  font-family: var(--font-display);
  font-size: clamp(27px, 4.2vw, 42px);
  font-weight: 200;
  letter-spacing: -.015em;
  line-height: 1.14;
  margin: 12px 0 0;
  overflow-wrap: anywhere;
}

.page-about .about-chapter__intro {
  font-size: 17px;
  line-height: 1.8;
  color: var(--text-soft);
  margin: 0 0 28px;
  max-width: 62ch;
}

.page-about .about-chapter__tail {
  margin: 28px 0 0;
  padding-left: 18px;
  border-left: 2px solid var(--cyan);
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-soft);
  max-width: 60ch;
}

.page-about .about-chapter__actions {
  margin: 28px 0 0;
}

.page-about .about-chapter__body .prose p {
  max-width: 66ch;
}

/* ---------- 数据来源 ---------- */
.page-about .about-data {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-data__item {
  padding: 24px 22px;
  border-radius: var(--radius);
  background: linear-gradient(160deg, rgba(22, 35, 58, .78), rgba(12, 20, 36, .5));
}

.page-about .about-data__value {
  display: block;
  font-size: 40px;
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--cyan);
}

.page-about .about-data__unit {
  font-size: 15px;
  letter-spacing: .06em;
  color: var(--muted);
  margin-left: 4px;
}

.page-about .about-data__name {
  margin: 14px 0 0;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: .01em;
}

.page-about .about-data__desc {
  margin: 10px 0 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--muted);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline__media {
  margin: 28px 0 0;
}

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

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

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 14px;
  bottom: 14px;
  border-left: 1px dashed var(--glass-line);
}

.page-about .about-timeline__item {
  position: relative;
  padding: 0 0 16px 30px;
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 16px;
  width: 9px;
  height: 9px;
  border: 2px solid var(--cyan);
  border-radius: 50%;
  background: var(--ink);
}

.page-about .about-timeline__item .disclose {
  border-radius: var(--radius);
  background: rgba(12, 20, 36, .58);
}

.page-about .disclose__trigger {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 14px;
  width: 100%;
  padding: 18px 18px;
  background: none;
  border: 0;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
  transition: background var(--dur) var(--ease);
}

.page-about .disclose__trigger:hover,
.page-about .disclose__trigger:focus-visible {
  background: rgba(22, 35, 58, .72);
}

.page-about .about-timeline__year {
  font-size: 15px;
  letter-spacing: .04em;
  color: var(--cyan);
  flex: 0 0 auto;
}

.page-about .about-timeline__name {
  font-size: 16px;
  line-height: 1.5;
  color: var(--text);
}

.page-about .disclose__icon {
  position: relative;
  width: 14px;
  height: 14px;
  flex: 0 0 auto;
}

.page-about .disclose__icon::before,
.page-about .disclose__icon::after {
  content: "";
  position: absolute;
  background: var(--cyan);
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .disclose__icon::before {
  left: 0;
  right: 0;
  top: 50%;
  height: 1.5px;
  margin-top: -.75px;
}

.page-about .disclose__icon::after {
  top: 0;
  bottom: 0;
  left: 50%;
  width: 1.5px;
  margin-left: -.75px;
}

.page-about .disclose__trigger[aria-expanded="true"] .disclose__icon::after {
  transform: scaleY(0);
}

.page-about .disclose__body {
  padding: 0 18px 20px;
}

.page-about .disclose__body p {
  margin: 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.82;
  color: var(--text-soft);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: 30px;
}

.page-about .about-team__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-team__row {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 4px 16px;
  padding: 20px 0;
  border-top: 1px solid var(--line);
}

.page-about .about-team__row:last-child {
  border-bottom: 1px solid var(--line);
}

.page-about .about-team__count {
  grid-row: span 2;
  font-size: 26px;
  line-height: 1.1;
  letter-spacing: -.02em;
  color: var(--violet);
}

.page-about .about-team__role {
  margin: 0;
  font-size: 17px;
  font-weight: 600;
}

.page-about .about-team__desc {
  margin: 6px 0 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--muted);
  max-width: 56ch;
}

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

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

/* ---------- 覆盖范围 ---------- */
.page-about .about-reach {
  display: grid;
  gap: 24px;
}

.page-about .about-reach__map {
  position: relative;
  min-height: 168px;
  border-radius: var(--radius-lg);
  background-color: rgba(12, 20, 36, .72);
  background-image: radial-gradient(circle, rgba(147, 162, 189, .45) 1.4px, transparent 1.5px);
  background-size: 22px 22px;
  overflow: hidden;
}

.page-about .about-reach__map::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(112deg, rgba(0, 233, 212, .10), transparent 58%);
}

.page-about .about-reach__map i {
  position: absolute;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 5px rgba(0, 233, 212, .16);
  animation: about-pulse 3.4s var(--ease) infinite;
}

.page-about .about-reach__map i:nth-child(1) { top: 30%; left: 26%; }
.page-about .about-reach__map i:nth-child(2) { top: 58%; left: 44%; animation-delay: .7s; }
.page-about .about-reach__map i:nth-child(3) { top: 24%; left: 66%; animation-delay: 1.4s; }
.page-about .about-reach__map i:nth-child(4) { top: 68%; left: 78%; animation-delay: 2.1s; background: var(--flare); box-shadow: 0 0 0 5px rgba(255, 75, 31, .18); }

@keyframes about-pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.28); opacity: .68; }
}

.page-about .about-reach__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .about-reach__item {
  padding: 18px 0 0;
  border-top: 1px solid var(--line);
}

.page-about .about-reach__label {
  display: block;
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-about .about-reach__value {
  display: block;
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 19px;
  letter-spacing: -.01em;
  color: var(--text);
}

.page-about .about-reach__desc {
  margin: 8px 0 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--muted);
  max-width: 58ch;
}

/* ---------- 规模条带 ---------- */
.page-about .about-band {
  padding: 8px 0 0;
}

.page-about .about-band .data-band__item {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-band__num {
  font-size: 24px;
  letter-spacing: -.02em;
  color: var(--cyan);
}

.page-about .about-band__label {
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--muted);
}

/* ---------- 下一步 ---------- */
.page-about .about-next {
  padding: 56px 0 72px;
}

.page-about .about-next__inner {
  padding: 30px 24px 26px;
  border-radius: var(--radius-lg);
}

.page-about .about-next__title {
  margin: 14px 0 22px;
  font-family: var(--font-display);
  font-size: clamp(24px, 3.6vw, 34px);
  font-weight: 200;
  letter-spacing: -.015em;
  line-height: 1.2;
}

.page-about .about-next__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

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

.page-about .about-next__link {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 16px 0;
  color: var(--text-soft);
  text-decoration: none;
  font-size: 15.5px;
  line-height: 1.6;
  transition: color var(--dur) var(--ease), gap var(--dur) var(--ease);
}

.page-about .about-next__link:hover,
.page-about .about-next__link:focus-visible {
  color: var(--cyan);
  gap: 22px;
}

.page-about .about-next__num {
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--muted);
  flex: 0 0 auto;
}

.page-about .about-next__text {
  min-width: 0;
}

/* ---------- 平板 ---------- */
@media (min-width: 700px) {
  .page-about .about-data {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .about-team__row {
    grid-template-columns: 56px 170px minmax(0, 1fr);
    align-items: baseline;
    gap: 0 20px;
    padding: 22px 0;
  }

  .page-about .about-team__count {
    grid-row: auto;
  }

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

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

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

/* ---------- 桌面 ---------- */
@media (min-width: 980px) {
  .page-about .breadcrumbs {
    padding-top: 32px;
  }

  .page-about .about-hero {
    padding: 56px 0 88px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(272px, .72fr);
    gap: 76px;
    align-items: start;
  }

  .page-about .about-index {
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }

  .page-about .about-chapter {
    padding: 88px 0;
  }

  .page-about .about-chapter__inner {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: var(--about-gap-lg);
    align-items: start;
  }

  .page-about .about-chapter__title {
    font-size: 38px;
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, 1fr) minmax(280px, .74fr);
    gap: 48px;
    align-items: start;
  }

  .page-about .about-reach {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    gap: 44px;
  }

  .page-about .about-reach__map {
    min-height: 260px;
  }

  .page-about .about-next {
    padding: 72px 0 96px;
  }

  .page-about .about-next__inner {
    padding: 44px 40px 38px;
  }
}

@media (min-width: 1180px) {
  .page-about .about-chapter__title {
    font-size: 42px;
  }
}

/* ---------- 降低动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-reach__map i {
    animation: none;
  }

  .page-about .about-index__link,
  .page-about .about-next__link,
  .page-about .disclose__trigger,
  .page-about .disclose__icon::before,
  .page-about .disclose__icon::after {
    transition: none;
  }
}