.page-about {
  --a-soft: rgba(235, 245, 236, .8);
  --a-dim: rgba(126, 147, 137, .95);
  --a-hair: rgba(126, 147, 137, .22);
  --a-panel-grad: linear-gradient(158deg, rgba(13, 42, 28, .96), rgba(6, 23, 15, .92));
  display: block;
  color: var(--c-mist);
  font-family: var(--font-body);
}

.page-about .breadcrumbs {
  padding: 1.1rem 0 .4rem;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(1.5rem, 4vw, 2.5rem) 0 clamp(2.25rem, 6vw, 3.75rem);
  background:
    radial-gradient(120% 96% at 88% -10%, rgba(63, 201, 255, .17), transparent 58%),
    radial-gradient(90% 78% at 2% 12%, rgba(182, 255, 59, .13), transparent 56%),
    linear-gradient(180deg, rgba(13, 42, 28, .82), rgba(6, 23, 15, 0) 82%);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: radial-gradient(rgba(126, 147, 137, .2) 1px, transparent 1px);
  background-size: 20px 20px;
  opacity: .5;
  mask-image: linear-gradient(115deg, rgba(0, 0, 0, .9), transparent 62%);
  -webkit-mask-image: linear-gradient(115deg, rgba(0, 0, 0, .9), transparent 62%);
}

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

.page-about .about-hero__eyebrow {
  margin: 0 0 1rem;
  font-family: var(--font-data);
  font-size: .74rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--c-mint);
}

.page-about .about-hero__title {
  margin: 0 0 1.15rem;
  font-family: var(--font-impact);
  font-weight: 800;
  letter-spacing: -.02em;
  font-size: clamp(1.95rem, 6.4vw, 3.4rem);
  line-height: 1.12;
  color: var(--c-mist);
  max-width: 20ch;
}

.page-about .about-hero__lede {
  margin: 0;
  max-width: 62ch;
  font-size: clamp(1rem, 2.4vw, 1.06rem);
  line-height: 1.8;
  color: var(--a-soft);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(132px, 1fr));
  gap: 1px;
  margin: clamp(1.75rem, 4vw, 2.5rem) 0 0;
  padding: 1px;
  list-style: none;
  background: var(--a-hair);
  border-radius: var(--r-lg);
  overflow: hidden;
}

.page-about .about-hero__stats li {
  display: flex;
  flex-direction: column;
  gap: .3rem;
  padding: 1rem 1.15rem;
  background: rgba(6, 23, 15, .82);
}

.page-about .about-hero__stats .num {
  font-family: var(--font-data);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.5rem, 4vw, 2.05rem);
  line-height: 1.1;
  color: var(--c-lime);
}

.page-about .about-hero__stats span {
  font-size: .8rem;
  letter-spacing: .04em;
  color: var(--c-mute);
}

/* ---------- 章节标题 ---------- */
.page-about .sec-head {
  max-width: 64ch;
  margin-bottom: clamp(1.6rem, 4vw, 2.6rem);
}

.page-about .sec-head--row {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem 1.5rem;
  max-width: none;
}

.page-about .sec-head__index {
  margin: 0 0 .7rem;
  font-family: var(--font-data);
  font-size: .72rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--c-mute);
}

.page-about .sec-head h2 {
  margin: 0 0 .85rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.45rem, 4.2vw, 2rem);
  line-height: 1.3;
  color: var(--c-mist);
}

.page-about .sec-head p {
  margin: 0;
  font-size: 1rem;
  line-height: 1.78;
  color: var(--a-soft);
}

/* ---------- 斜向分隔带 ---------- */
.page-about .slant-band {
  height: clamp(24px, 4.5vw, 48px);
  margin: clamp(1rem, 3vw, 2rem) 0;
  background: linear-gradient(102deg, rgba(182, 255, 59, .18), rgba(63, 201, 255, .09) 46%, rgba(255, 174, 43, 0) 76%);
  clip-path: polygon(0 0, 100% 0, 100% 46%, 0 100%);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  position: relative;
  padding: clamp(1.5rem, 4vw, 2.5rem) 0 clamp(1.75rem, 4vw, 3rem);
}

.page-about .timeline-figure {
  margin: 0 0 clamp(2rem, 5vw, 3.25rem);
}

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

.page-about .tl::before {
  content: "";
  position: absolute;
  left: 19px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--c-lime), var(--c-mint) 38%, rgba(126, 147, 137, .3) 92%);
  opacity: .72;
}

.page-about .tl__item {
  position: relative;
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 0 1rem;
  padding-bottom: clamp(1.5rem, 4vw, 2.4rem);
}

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

.page-about .tl__node {
  display: flex;
  justify-content: center;
  padding-top: .55rem;
}

.page-about .tl__dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--c-night);
  border: 2px solid var(--c-lime);
  box-shadow: 0 0 0 4px rgba(182, 255, 59, .12);
  transition: background .22s var(--ease), box-shadow .22s var(--ease);
}

.page-about .tl__item:hover .tl__dot,
.page-about .tl__item:focus-within .tl__dot {
  background: var(--c-lime);
  box-shadow: 0 0 0 7px rgba(182, 255, 59, .2);
}

.page-about .tl__body {
  padding: clamp(1.05rem, 3vw, 1.6rem) clamp(1.05rem, 3vw, 1.7rem);
  border: var(--edge);
  border-radius: var(--r-lg);
  background: var(--a-panel-grad);
  box-shadow: var(--shadow-1);
  transition: transform .24s var(--ease), border-color .24s var(--ease), box-shadow .24s var(--ease);
}

.page-about .tl__body:hover {
  transform: translateY(-3px);
  border-color: rgba(182, 255, 59, .42);
  box-shadow: var(--shadow-2);
}

.page-about .tl__body .panel__index {
  margin: 0 0 .5rem;
  font-family: var(--font-data);
  font-size: .72rem;
  letter-spacing: .12em;
  color: var(--c-blue);
}

.page-about .tl__body .panel__title {
  margin: 0 0 .6rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.08rem, 3vw, 1.3rem);
  line-height: 1.4;
  color: var(--c-mist);
}

.page-about .tl__body p:last-child {
  margin: 0;
  font-size: .96rem;
  line-height: 1.78;
  color: var(--a-soft);
}

@media (min-width: 940px) {
  .page-about .tl::before {
    left: 50%;
  }

  .page-about .tl__item {
    grid-template-columns: minmax(0, 1fr) 72px minmax(0, 1fr);
    gap: 0 1.5rem;
  }

  .page-about .tl__node {
    grid-column: 2;
    grid-row: 1;
    padding-top: 1.5rem;
  }

  .page-about .tl__body {
    grid-column: 3;
    grid-row: 1;
  }

  .page-about .tl__item--flip .tl__body {
    grid-column: 1;
    grid-row: 1;
  }
}

/* ---------- 两条主线 ---------- */
.page-about .about-lines {
  padding: clamp(2.25rem, 6vw, 4rem) 0;
}

.page-about .lines {
  display: grid;
  gap: 1.25rem;
}

.page-about .line-card {
  position: relative;
  padding: clamp(1.25rem, 3.4vw, 1.9rem);
  border: var(--edge);
  border-radius: var(--r-xl);
  background: var(--a-panel-grad);
  box-shadow: var(--shadow-1);
  overflow: hidden;
}

.page-about .line-card::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 4px;
}

.page-about .line-card--a::before {
  background: linear-gradient(180deg, var(--c-mint), rgba(75, 227, 155, .1));
}

.page-about .line-card--b::before {
  background: linear-gradient(180deg, var(--c-blue), rgba(63, 201, 255, .1));
}

.page-about .line-card__tag {
  display: inline-block;
  margin: 0 0 .9rem;
  padding: .3rem .85rem;
  border-radius: var(--r-pill);
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .1em;
  color: var(--c-ink);
}

.page-about .line-card--a .line-card__tag {
  background: var(--c-mint);
}

.page-about .line-card--b .line-card__tag {
  background: var(--c-blue);
}

.page-about .line-card__title {
  margin: 0 0 .75rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.15rem, 3.2vw, 1.4rem);
  line-height: 1.4;
  color: var(--c-mist);
}

.page-about .line-card__text {
  margin: 0 0 1.1rem;
  font-size: .96rem;
  line-height: 1.8;
  color: var(--a-soft);
}

.page-about .line-card__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: .55rem;
}

.page-about .line-card__list li {
  position: relative;
  padding-left: 1.15rem;
  font-size: .9rem;
  line-height: 1.65;
  color: var(--a-soft);
}

.page-about .line-card__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .58em;
  width: 7px;
  height: 7px;
  border-radius: 2px;
  transform: rotate(45deg);
  background: var(--c-lime);
  opacity: .85;
}

.page-about .handoff {
  margin: clamp(1.5rem, 4vw, 2.25rem) 0 0;
  padding: 1rem 1.15rem;
  border: 1px dashed rgba(255, 174, 43, .45);
  border-radius: var(--r-md);
  background: rgba(255, 174, 43, .07);
  font-size: .93rem;
  line-height: 1.78;
  color: var(--a-soft);
}

.page-about .handoff b {
  color: var(--c-amber);
  font-weight: 600;
}

@media (min-width: 860px) {
  .page-about .lines {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 2rem;
    align-items: start;
  }

  .page-about .line-card--b {
    margin-top: 3.5rem;
  }
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  padding: clamp(2.25rem, 6vw, 4rem) 0;
}

.page-about .team-layout {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.5rem);
}

.page-about .roles {
  display: grid;
  gap: 1rem;
}

.page-about .role {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: .35rem 1rem;
  padding: clamp(1.05rem, 3vw, 1.5rem);
  border: var(--edge);
  border-radius: var(--r-lg);
  background: var(--a-panel-grad);
  box-shadow: var(--shadow-1);
  transition: transform .24s var(--ease), border-color .24s var(--ease);
}

.page-about .role:hover {
  transform: translateY(-3px);
  border-color: rgba(182, 255, 59, .4);
}

.page-about .role__no {
  grid-row: span 2;
  margin: 0;
  font-family: var(--font-data);
  font-weight: 600;
  font-size: 1.7rem;
  line-height: 1;
  color: rgba(182, 255, 59, .55);
  font-variant-numeric: tabular-nums;
}

.page-about .role__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  line-height: 1.4;
  color: var(--c-mist);
}

.page-about .role__text {
  grid-column: 2;
  margin: 0;
  font-size: .93rem;
  line-height: 1.78;
  color: var(--a-soft);
}

.page-about .team-figure {
  margin: 0;
  border-radius: var(--r-xl);
  border: var(--edge);
  overflow: hidden;
  background: var(--c-panel);
}

@media (min-width: 900px) {
  .page-about .team-layout {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    align-items: start;
  }

  .page-about .roles {
    gap: 1.15rem;
  }

  .page-about .role:nth-child(2) {
    margin-left: 2rem;
  }

  .page-about .role:nth-child(3) {
    margin-left: 1rem;
  }
}

/* ---------- 流程带 ---------- */
.page-about .about-flow {
  padding: clamp(2.25rem, 6vw, 4rem) 0;
  background:
    radial-gradient(100% 70% at 0 0, rgba(75, 227, 155, .1), transparent 58%),
    linear-gradient(180deg, rgba(13, 42, 28, .5), rgba(6, 23, 15, 0) 76%);
}

.page-about .flow-wrap {
  position: relative;
  overflow: hidden;
}

.page-about .flow-wrap::after {
  content: "";
  position: absolute;
  inset: 0 0 0 auto;
  width: clamp(28px, 8vw, 90px);
  pointer-events: none;
  background: linear-gradient(270deg, var(--c-night), rgba(6, 23, 15, 0));
}

.page-about .flow {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(232px, 76vw);
  gap: .9rem;
  margin: 0;
  padding: .35rem clamp(1rem, 4vw, 3rem) 1.35rem;
  list-style: none;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  scrollbar-width: thin;
}

.page-about .flow__step {
  scroll-snap-align: start;
  position: relative;
  padding: 1.15rem 1.1rem 1.3rem;
  border: var(--edge);
  border-top: 3px solid var(--c-lime);
  border-radius: var(--r-lg);
  background: var(--a-panel-grad);
  box-shadow: var(--shadow-1);
  transition: transform .24s var(--ease), border-color .24s var(--ease);
}

.page-about .flow__step:hover {
  transform: translateY(-4px);
  border-top-color: var(--c-mint);
}

.page-about .flow__no {
  display: block;
  margin-bottom: .6rem;
  font-family: var(--font-data);
  font-weight: 600;
  font-size: .8rem;
  letter-spacing: .12em;
  color: var(--c-amber);
}

.page-about .flow__title {
  margin: 0 0 .55rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  line-height: 1.42;
  color: var(--c-mist);
}

.page-about .flow__step p {
  margin: 0;
  font-size: .9rem;
  line-height: 1.75;
  color: var(--a-soft);
}

.page-about .flow-note {
  display: grid;
  gap: clamp(1.25rem, 3.5vw, 2.25rem);
  margin-top: clamp(1.5rem, 4vw, 2.5rem);
}

.page-about .flow-figure {
  margin: 0;
  border-radius: var(--r-xl);
  border: var(--edge);
  overflow: hidden;
  background: var(--c-panel);
}

.page-about .flow-note__text h3 {
  margin: 0 0 .75rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.1rem, 3vw, 1.35rem);
  line-height: 1.4;
  color: var(--c-mist);
}

.page-about .flow-note__text p {
  margin: 0 0 .9rem;
  font-size: .96rem;
  line-height: 1.8;
  color: var(--a-soft);
}

.page-about .flow-note__text p:last-child {
  margin-bottom: 0;
}

@media (min-width: 780px) {
  .page-about .flow {
    grid-auto-columns: minmax(220px, 1fr);
  }

  .page-about .flow-note {
    grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr);
    align-items: center;
  }
}

/* ---------- 青训 ---------- */
.page-about .about-youth {
  padding: clamp(2.25rem, 6vw, 4rem) 0;
}

.page-about .youth-grid {
  display: grid;
  gap: 1rem;
}

.page-about .youth-card {
  position: relative;
  padding: clamp(1.15rem, 3.2vw, 1.6rem);
  border: var(--edge);
  border-radius: var(--r-lg);
  background: linear-gradient(165deg, rgba(75, 227, 155, .09), rgba(13, 42, 28, .94) 58%);
  box-shadow: var(--shadow-1);
  transition: transform .24s var(--ease), border-color .24s var(--ease);
}

.page-about .youth-card:hover {
  transform: translateY(-3px);
  border-color: rgba(75, 227, 155, .45);
}

.page-about .youth-card__tag {
  display: inline-block;
  margin: 0 0 .8rem;
  padding: .22rem .7rem;
  border-radius: var(--r-pill);
  border: 1px solid rgba(75, 227, 155, .5);
  font-family: var(--font-data);
  font-size: .7rem;
  letter-spacing: .12em;
  color: var(--c-mint);
}

.page-about .youth-card__title {
  margin: 0 0 .6rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.08rem;
  line-height: 1.42;
  color: var(--c-mist);
}

.page-about .youth-card p:last-child {
  margin: 0;
  font-size: .93rem;
  line-height: 1.78;
  color: var(--a-soft);
}

.page-about .youth-strip {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .75rem 1rem;
  margin-top: clamp(1.5rem, 4vw, 2.25rem);
  padding: 1rem 1.15rem;
  border-radius: var(--r-pill);
  border: var(--edge);
  background: rgba(13, 42, 28, .62);
}

.page-about .youth-strip__label {
  margin: 0;
  font-family: var(--font-data);
  font-size: .74rem;
  letter-spacing: .12em;
  color: var(--c-mute);
}

.page-about .youth-strip__list {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem .75rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .youth-strip__list li {
  padding: .28rem .8rem;
  border-radius: var(--r-pill);
  border: 1px solid rgba(182, 255, 59, .38);
  font-size: .82rem;
  color: var(--c-lime);
}

@media (min-width: 800px) {
  .page-about .youth-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.25rem;
  }

  .page-about .youth-card:nth-child(2) {
    margin-top: 1.75rem;
  }
}

/* ---------- 协作与报告 ---------- */
.page-about .about-partners {
  padding: clamp(2.25rem, 6vw, 4rem) 0;
}

.page-about .partners {
  display: grid;
  gap: 1rem;
  margin-bottom: clamp(1.75rem, 4.5vw, 2.75rem);
}

.page-about .partner {
  padding: clamp(1.15rem, 3.2vw, 1.6rem);
  border: var(--edge);
  border-radius: var(--r-lg);
  background: var(--a-panel-grad);
  box-shadow: var(--shadow-1);
}

.page-about .partner__no {
  margin: 0 0 .7rem;
  font-family: var(--font-data);
  font-weight: 600;
  font-size: clamp(1.5rem, 4vw, 2rem);
  line-height: 1;
  color: var(--c-blue);
  font-variant-numeric: tabular-nums;
}

.page-about .partner__title {
  margin: 0 0 .6rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.08rem;
  line-height: 1.42;
  color: var(--c-mist);
}

.page-about .partner p:last-child {
  margin: 0;
  font-size: .93rem;
  line-height: 1.78;
  color: var(--a-soft);
}

.page-about .report {
  padding: clamp(1.25rem, 3.5vw, 2rem);
  border: var(--edge);
  border-radius: var(--r-xl);
  background: var(--a-panel-grad);
  box-shadow: var(--shadow-2);
}

.page-about .report__head .panel__index {
  margin: 0 0 .6rem;
  font-family: var(--font-data);
  font-size: .72rem;
  letter-spacing: .12em;
  color: var(--c-amber);
}

.page-about .report__head .panel__title {
  margin: 0 0 .8rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.15rem, 3.2vw, 1.45rem);
  line-height: 1.38;
  color: var(--c-mist);
}

.page-about .report__lede {
  margin: 0 0 1.15rem;
  font-size: .95rem;
  line-height: 1.78;
  color: var(--a-soft);
}

.page-about .report__toc {
  display: grid;
  gap: .5rem;
  margin: 0 0 1.5rem;
  padding: 0;
  list-style: none;
}

.page-about .report__toc a {
  display: inline-block;
  padding: .45rem .9rem;
  border-radius: var(--r-pill);
  border: 1px solid rgba(63, 201, 255, .35);
  color: var(--c-blue);
  font-size: .86rem;
  text-decoration: none;
  transition: background .2s var(--ease), border-color .2s var(--ease);
}

.page-about .report__toc a:hover {
  background: rgba(63, 201, 255, .12);
  border-color: var(--c-blue);
}

.page-about .report__body {
  display: grid;
  gap: 1rem;
}

.page-about .report__section {
  scroll-margin-top: 1.5rem;
  padding: 1rem 1.1rem;
  border-left: 3px solid var(--c-mint);
  border-radius: 0 var(--r-md) var(--r-md) 0;
  background: rgba(6, 23, 15, .55);
}

.page-about .report__section h4 {
  margin: 0 0 .45rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  line-height: 1.45;
  color: var(--c-mist);
}

.page-about .report__section p {
  margin: 0;
  font-size: .92rem;
  line-height: 1.78;
  color: var(--a-soft);
}

@media (min-width: 820px) {
  .page-about .partners {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 1.5rem;
  }

  .page-about .report {
    display: grid;
    grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr);
    gap: clamp(1.5rem, 4vw, 2.75rem);
    align-items: start;
  }

  .page-about .report__toc {
    grid-auto-flow: row;
    margin-bottom: 0;
  }
}

/* ---------- 结尾 ---------- */
.page-about .about-cta {
  padding: clamp(2.25rem, 6vw, 4rem) 0 clamp(2.5rem, 7vw, 4.5rem);
  background:
    radial-gradient(96% 120% at 100% 100%, rgba(182, 255, 59, .14), transparent 62%),
    linear-gradient(180deg, rgba(6, 23, 15, 0), rgba(13, 42, 28, .72));
}

.page-about .about-cta__inner {
  display: grid;
  gap: clamp(1.25rem, 3.5vw, 2rem);
  padding: clamp(1.35rem, 3.8vw, 2.25rem);
  border: var(--edge);
  border-radius: var(--r-xl);
  background: var(--a-panel-grad);
  box-shadow: var(--shadow-2);
}

.page-about .about-cta__text h2 {
  margin: 0 0 .8rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.35rem, 3.8vw, 1.75rem);
  line-height: 1.32;
  color: var(--c-mist);
}

.page-about .about-cta__text p {
  margin: 0;
  font-size: .97rem;
  line-height: 1.8;
  color: var(--a-soft);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .7rem;
  align-content: start;
}

@media (min-width: 880px) {
  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, .9fr);
    align-items: center;
  }

  .page-about .about-cta__actions {
    justify-content: flex-end;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .tl__body,
  .page-about .role,
  .page-about .flow__step,
  .page-about .youth-card,
  .page-about .tl__dot {
    transition: none;
  }

  .page-about .tl__body:hover,
  .page-about .role:hover,
  .page-about .flow__step:hover,
  .page-about .youth-card:hover {
    transform: none;
  }
}
<<<END>>>