.page-about {
  --about-pad: clamp(20px, 4.4vw, 56px);
  --about-y: clamp(48px, 7vw, 96px);
  --about-card-bg: rgba(11, 31, 58, 0.72);
  --about-glow: rgba(44, 229, 210, 0.18);
  background: var(--night);
  color: var(--white);
}

.page-about img {
  max-width: 100%;
  height: auto;
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumb {
  padding: 20px var(--about-pad) 0;
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--mist);
}
.page-about .about-crumb a {
  color: var(--cyan);
  text-decoration: none;
}
.page-about .about-crumb a:hover {
  text-decoration: underline;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  display: flex;
  align-items: flex-end;
  min-height: clamp(520px, 66vh, 700px);
  padding: clamp(56px, 8vw, 104px) var(--about-pad) clamp(40px, 5vw, 72px);
  overflow: hidden;
  isolation: isolate;
}
.page-about .about-hero__media {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.38;
  z-index: -2;
}
.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(180deg, rgba(6, 20, 38, 0.55) 0%, rgba(6, 20, 38, 0.9) 68%, var(--night) 100%),
    linear-gradient(100deg, var(--violet) 0%, transparent 58%);
}
.page-about .about-hero__inner {
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
}
.page-about .about-hero__kicker {
  font-size: 13px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan);
  margin: 0 0 14px;
}
.page-about .about-hero__title {
  font-family: var(--font-narrow);
  font-size: clamp(30px, 5.6vw, 46px);
  font-weight: 700;
  line-height: 1.16;
  letter-spacing: 0.01em;
  max-width: 20ch;
  margin: 0 0 18px;
}
.page-about .about-hero__lead {
  max-width: 60ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
  color: var(--mist);
  margin: 0 0 clamp(26px, 3.4vw, 40px);
}
.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(14px, 2.4vw, 28px);
  max-width: 900px;
  margin: 0;
  padding-top: clamp(18px, 2.4vw, 28px);
  border-top: 1px solid var(--cyan-line);
}
.page-about .about-stat dt,
.page-about .about-stat dd {
  margin: 0;
}
.page-about .about-stat__label {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
  margin-bottom: 6px;
}
.page-about .about-stat__num {
  font-size: clamp(26px, 3.6vw, 38px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--signal);
}

/* ---------- 章节标题组 ---------- */
.page-about .about-head {
  display: grid;
  gap: 10px;
  max-width: 760px;
  margin-bottom: clamp(28px, 4vw, 52px);
}
.page-about .about-head__num {
  font-size: 13px;
  letter-spacing: 0.2em;
  color: var(--orange);
  margin: 0;
}
.page-about .about-head__title {
  font-family: var(--font-narrow);
  font-size: clamp(24px, 3.4vw, 34px);
  font-weight: 700;
  line-height: 1.22;
  letter-spacing: 0.005em;
  margin: 0;
}
.page-about .about-head__sub {
  font-size: 16px;
  line-height: 1.78;
  color: var(--mist);
  margin: 0;
}
.page-about .about-head--light .about-head__title {
  color: var(--ink);
}
.page-about .about-head--light .about-head__sub {
  color: rgba(5, 7, 12, 0.7);
}

/* ---------- 发展历程 ---------- */
.page-about .about-timeline {
  padding: var(--about-y) var(--about-pad);
  background: var(--night);
}
.page-about .about-timeline__figure {
  margin: 0 0 clamp(32px, 4.6vw, 56px);
}
.page-about .about-timeline__figure img {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: var(--radius-panel);
  border: 1px solid var(--cyan-line);
}
.page-about .about-timeline__figure figcaption {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}
.page-about .about-timeline__body {
  display: grid;
  gap: clamp(24px, 3.6vw, 44px);
}
.page-about .about-track {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding-bottom: 6px;
  scrollbar-width: thin;
}
.page-about .about-track__item {
  flex: 0 0 auto;
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 9px 14px;
  border: 1px solid var(--cyan-line);
  border-radius: 999px;
  color: var(--mist);
  text-decoration: none;
  transition: border-color var(--t-color) var(--ease), color var(--t-color) var(--ease), background-color var(--t-color) var(--ease);
}
.page-about .about-track__item:hover,
.page-about .about-track__item:focus-visible {
  border-color: var(--cyan);
  color: var(--cyan);
  outline: none;
}
.page-about .about-track__year {
  font-size: 16px;
  font-weight: 800;
  letter-spacing: 0.02em;
}
.page-about .about-track__tag {
  font-size: 11px;
  letter-spacing: 0.12em;
}
.page-about .about-stages {
  display: grid;
  gap: clamp(14px, 2vw, 22px);
}
.page-about .about-stage {
  position: relative;
  scroll-margin-top: 110px;
  padding: clamp(20px, 2.8vw, 30px);
  background: var(--about-card-bg);
  border: 1px solid rgba(166, 179, 196, 0.16);
  border-radius: var(--radius-card);
  transition: border-color var(--t-color) var(--ease), box-shadow var(--t-color) var(--ease);
}
.page-about .about-stage:hover,
.page-about .about-stage:focus-visible {
  border-color: var(--cyan);
  box-shadow: 0 0 0 1px var(--about-glow), 0 18px 44px -28px rgba(44, 229, 210, 0.6);
  outline: none;
}
.page-about .about-stage__year {
  display: inline-block;
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--mist);
  margin: 0;
  transition: color var(--t-color) var(--ease);
}
.page-about .about-stage:hover .about-stage__year,
.page-about .about-stage:focus-visible .about-stage__year {
  color: var(--cyan);
}
.page-about .about-stage__title {
  margin: 8px 0 10px;
  font-family: var(--font-narrow);
  font-size: clamp(19px, 2.3vw, 24px);
  font-weight: 700;
  line-height: 1.24;
  letter-spacing: 0.01em;
}
.page-about .about-stage__text {
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
  max-width: 62ch;
  margin: 0;
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  padding: var(--about-y) var(--about-pad);
  background: var(--white);
  color: var(--ink);
}
.page-about .about-team__body {
  display: grid;
  gap: clamp(26px, 4vw, 52px);
}
.page-about .about-team__figure {
  margin: 0;
}
.page-about .about-team__figure img {
  display: block;
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-radius: var(--radius-panel);
}
.page-about .about-team__figure figcaption {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.7;
  color: rgba(5, 7, 12, 0.62);
}
.page-about .about-team__list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-about .about-member {
  display: grid;
  grid-template-columns: 66px minmax(0, 1fr);
  gap: 4px 18px;
  padding: clamp(16px, 2.2vw, 22px) 0;
  border-top: 1px solid rgba(5, 7, 12, 0.14);
}
.page-about .about-member:last-child {
  border-bottom: 1px solid rgba(5, 7, 12, 0.14);
}
.page-about .about-member__num {
  grid-row: 1 / span 2;
  margin: 0;
  padding-top: 2px;
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--deep);
}
.page-about .about-member__name {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.3;
}
.page-about .about-member__note {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: rgba(5, 7, 12, 0.72);
}

/* ---------- 合作生态 ---------- */
.page-about .about-partners {
  padding: var(--about-y) var(--about-pad);
  background: linear-gradient(140deg, var(--deep) 0%, var(--violet) 100%);
}
.page-about .about-partner-list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-about .about-partner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  padding: clamp(20px, 2.8vw, 30px) 0;
  border-top: 1px solid var(--cyan-line);
}
.page-about .about-partner:last-child {
  border-bottom: 1px solid var(--cyan-line);
}
.page-about .about-partner__num {
  margin: 0;
  font-size: clamp(24px, 3.2vw, 34px);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--orange);
}
.page-about .about-partner__name {
  margin: 0;
  font-family: var(--font-narrow);
  font-size: clamp(17px, 2vw, 20px);
  font-weight: 700;
  letter-spacing: 0.02em;
}
.page-about .about-partner__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mist);
}

/* ---------- 资质与荣誉 ---------- */
.page-about .about-honors {
  padding: var(--about-y) var(--about-pad);
  background: var(--mint);
  color: var(--ink);
}
.page-about .about-honor-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(14px, 2vw, 20px);
}
.page-about .about-honor {
  padding: clamp(20px, 2.6vw, 28px);
  background: rgba(255, 255, 255, 0.66);
  border: 1px solid rgba(5, 7, 12, 0.08);
  border-left: 3px solid var(--orange);
  border-radius: var(--radius-card);
}
.page-about .about-honor__tag {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--deep);
  opacity: 0.72;
}
.page-about .about-honor__name {
  margin: 0 0 8px;
  font-family: var(--font-narrow);
  font-size: clamp(18px, 2.1vw, 22px);
  font-weight: 700;
  line-height: 1.28;
}
.page-about .about-honor__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: rgba(5, 7, 12, 0.7);
}

/* ---------- 服务范围与响应 ---------- */
.page-about .about-reach {
  padding: var(--about-y) var(--about-pad) calc(var(--about-y) * 0.9);
  background: var(--night);
}
.page-about .about-reach__list {
  margin: 0 0 clamp(28px, 4vw, 48px);
}
.page-about .about-reach__list .data-list__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 16px 0;
  border-bottom: 1px solid var(--cyan-line);
}
.page-about .about-reach__list .data-list__key {
  margin: 0;
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--cyan);
}
.page-about .about-reach__list .data-list__val {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.72;
  color: var(--white);
}
.page-about .about-reach__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin: 0;
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-reach__list .data-list__row {
    grid-template-columns: 220px minmax(0, 1fr);
    gap: clamp(18px, 3vw, 40px);
    align-items: baseline;
  }
}

@media (min-width: 780px) {
  .page-about .about-partner {
    grid-template-columns: 110px minmax(0, 0.8fr) minmax(0, 1.4fr);
    gap: clamp(18px, 3vw, 44px);
    align-items: baseline;
  }
}

@media (min-width: 820px) {
  .page-about .about-honor-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: clamp(18px, 2.4vw, 28px);
  }
  .page-about .about-honor:nth-child(2) {
    margin-top: 28px;
  }
  .page-about .about-honor:nth-child(3) {
    margin-top: 14px;
  }
}

@media (min-width: 900px) {
  .page-about .about-timeline__figure {
    max-width: 720px;
    margin-left: auto;
    margin-right: 0;
  }
  .page-about .about-stage:nth-child(odd) {
    max-width: 92%;
  }
  .page-about .about-stage:nth-child(even) {
    max-width: 88%;
    margin-left: auto;
  }
}

@media (min-width: 940px) {
  .page-about .about-team__body {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.06fr);
    align-items: start;
    gap: clamp(32px, 4.6vw, 72px);
  }
}

@media (min-width: 980px) {
  .page-about .about-timeline__body {
    grid-template-columns: 116px minmax(0, 1fr);
    gap: clamp(32px, 4.4vw, 68px);
    align-items: start;
  }
  .page-about .about-track {
    position: sticky;
    top: 96px;
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
  }
  .page-about .about-track__item {
    display: block;
    border: 0;
    border-left: 2px solid rgba(166, 179, 196, 0.24);
    border-radius: 0;
    padding: 12px 0 12px 14px;
    background: none;
  }
  .page-about .about-track__item:hover,
  .page-about .about-track__item:focus-visible {
    border-left-color: var(--cyan);
    background: linear-gradient(90deg, var(--about-glow), transparent 80%);
  }
  .page-about .about-track__tag {
    display: block;
    margin-top: 2px;
  }
}

@media (min-width: 1180px) {
  .page-about .about-head {
    max-width: 820px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-track__item,
  .page-about .about-stage,
  .page-about .about-stage__year {
    transition: none;
  }
}