.page-about {
  --about-note: 150px;
  --about-rule: rgba(110, 139, 128, 0.35);
  --about-rule-strong: rgba(63, 255, 210, 0.28);
  background: var(--ink);
  color: var(--cream);
  font-family: var(--font-sans);
}

/* ---------- 序章 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(24px, 4.5vw, 56px) 0 clamp(30px, 4.5vw, 52px);
  background:
    radial-gradient(120% 100% at 90% -10%, rgba(63, 255, 210, 0.14), transparent 60%),
    linear-gradient(180deg, var(--ink-deep) 0%, var(--ink) 100%);
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(22px, 4vw, 40px);
  align-items: end;
}

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

.page-about .breadcrumbs a {
  color: var(--mist);
  text-decoration: none;
}

.page-about .breadcrumbs a:hover,
.page-about .breadcrumbs a:focus-visible {
  color: var(--cyan);
}

.page-about .breadcrumbs li[aria-current="page"] {
  color: var(--cyan);
}

.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(38px, 7.2vw, 68px);
  line-height: 0.96;
  letter-spacing: -0.025em;
  font-weight: 800;
  margin: 10px 0 18px;
  color: var(--cream);
  text-wrap: balance;
}

.page-about .about-hero__intro {
  font-size: clamp(16px, 2.1vw, 18.5px);
  line-height: 1.72;
  color: var(--mist);
  max-width: 46ch;
  margin: 0 0 24px;
}

.page-about .about-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-hero__facts li {
  display: flex;
  align-items: baseline;
  gap: 5px;
  padding: 10px 14px;
  border: 1px solid var(--about-rule-strong);
  background: rgba(20, 63, 53, 0.5);
  border-radius: var(--radius);
}

.page-about .about-fact__num {
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
}

.page-about .about-fact__unit {
  font-size: 12px;
  color: var(--mist);
}

.page-about .about-fact__label {
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--mist);
  margin-left: 4px;
}

.page-about .about-hero__figure {
  margin: 0;
  border: 1px solid var(--about-rule-strong);
  background: var(--glass);
  overflow: hidden;
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
  filter: saturate(0.9) contrast(1.06);
}

.page-about .about-hero__figure figcaption {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--mist);
  padding: 10px 14px;
  border-top: 1px solid var(--about-rule);
  background: var(--ink-deep);
}

/* ---------- 里程碑条带 ---------- */
.page-about .about-timeline {
  background: var(--ink-deep);
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-timeline__track {
  display: flex;
  margin: 0;
  padding: 0;
  list-style: none;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-timeline__node {
  flex: 0 0 auto;
  min-width: 206px;
  max-width: 258px;
  padding: 16px 18px 18px;
  border-right: 1px solid rgba(110, 139, 128, 0.28);
  scroll-snap-align: start;
}

.page-about .about-timeline__year {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--cyan);
  margin-bottom: 6px;
}

.page-about .about-timeline__node:nth-child(3n) .about-timeline__year {
  color: var(--orange);
}

.page-about .about-timeline__text {
  display: block;
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 主体骨架 ---------- */
.page-about .about-shell {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  padding-block: clamp(34px, 6vw, 72px);
}

.page-about .about-rail {
  display: none;
}

.page-about .about-rail__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--mist);
  opacity: 0.8;
}

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

.page-about .about-rail__list a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 8px 0;
  border-bottom: 1px solid rgba(110, 139, 128, 0.18);
  color: var(--mist);
  font-size: 14px;
  text-decoration: none;
  transition: color 160ms var(--ease);
}

.page-about .about-rail__list a span {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--cyan);
}

.page-about .about-rail__list a:hover,
.page-about .about-rail__list a:focus-visible {
  color: var(--cream);
}

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

/* ---------- 章节 ---------- */
.page-about .about-chapter {
  padding-block: clamp(22px, 3.4vw, 34px) clamp(32px, 4.6vw, 54px);
  border-top: 1px solid var(--about-rule);
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-about .about-chapter:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .about-plate {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 14px;
  padding: 6px 12px 6px 10px;
  border: 1px solid var(--about-rule-strong);
  background: rgba(20, 63, 53, 0.42);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.page-about .about-plate__year {
  color: var(--cyan);
}

.page-about .about-plate--alt {
  border-color: rgba(255, 107, 44, 0.45);
}

.page-about .about-plate--alt .about-plate__year {
  color: var(--orange);
}

.page-about .about-chapter h2 {
  font-family: var(--font-display);
  font-size: clamp(26px, 4.2vw, 42px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  font-weight: 800;
  margin: 0 0 16px;
  color: var(--cream);
  max-width: 22ch;
  text-wrap: balance;
}

.page-about .about-chapter p {
  margin: 0 0 14px;
  font-size: 16.5px;
  line-height: 1.78;
  color: var(--mist);
  max-width: 66ch;
}

.page-about .about-quote {
  margin: 22px 0;
  padding: 18px 20px;
  border-left: 3px solid var(--cyan);
  background: rgba(20, 63, 53, 0.55);
  backdrop-filter: blur(4px);
  max-width: 58ch;
}

.page-about .about-quote p {
  margin: 0;
  font-size: 17px;
  line-height: 1.7;
  color: var(--cream);
}

/* ---------- 人群 ---------- */
.page-about .about-people {
  display: grid;
  gap: 16px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-people li {
  border-top: 2px solid var(--cyan);
  padding: 14px 0 0;
  background: linear-gradient(180deg, rgba(63, 255, 210, 0.07), transparent 62%);
}

.page-about .about-people li:nth-child(2) {
  border-top-color: var(--orange);
  background: linear-gradient(180deg, rgba(255, 107, 44, 0.08), transparent 62%);
}

.page-about .about-people li:nth-child(3) {
  border-top-color: var(--mist);
  background: linear-gradient(180deg, rgba(201, 216, 206, 0.08), transparent 62%);
}

.page-about .about-people h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 20px;
  letter-spacing: -0.01em;
  line-height: 1.2;
  color: var(--cream);
}

.page-about .about-people p {
  margin: 0;
  max-width: none;
  font-size: 14.5px;
  line-height: 1.7;
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 24px 0 0;
  border: 1px solid var(--about-rule);
  background: var(--ink-deep);
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.page-about .about-figure--wide img {
  aspect-ratio: 4 / 3;
}

.page-about .about-figure figcaption {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: var(--mist);
  padding: 9px 12px;
  border-top: 1px solid var(--about-rule);
}

/* ---------- 流程步骤 ---------- */
.page-about .about-steps {
  display: grid;
  margin: 22px 0 20px;
  padding: 0;
  list-style: none;
}

.page-about .about-steps li {
  padding: 16px 0 16px;
  border-top: 1px solid var(--about-rule-strong);
}

.page-about .about-steps__index {
  display: block;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--cyan);
  margin-bottom: 8px;
}

.page-about .about-steps li:nth-child(2) .about-steps__index {
  color: var(--orange);
}

.page-about .about-steps h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 18px;
  letter-spacing: -0.01em;
  color: var(--cream);
}

.page-about .about-steps p {
  margin: 0;
  max-width: none;
  font-size: 14.5px;
  line-height: 1.7;
}

/* ---------- 团队数字 ---------- */
.page-about .about-team {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 22px 0 20px;
  padding: 0;
  list-style: none;
}

.page-about .about-team li {
  position: relative;
  padding: 14px 14px 16px;
  border: 1px solid var(--about-rule);
  background: var(--ink-deep);
}

.page-about .about-team li::before {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  top: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), transparent);
}

.page-about .about-team li:first-child::before {
  background: linear-gradient(90deg, var(--orange), transparent);
}

.page-about .about-team__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(26px, 4vw, 36px);
  line-height: 1;
  color: var(--cyan);
  margin-bottom: 8px;
}

.page-about .about-team__num--total {
  color: var(--orange);
}

.page-about .about-team__label {
  display: block;
  font-size: 13px;
  line-height: 1.55;
  color: var(--mist);
}

/* ---------- 荣誉 ---------- */
.page-about .about-honors {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-honors li {
  border: 1px dashed rgba(255, 107, 44, 0.5);
  background: rgba(255, 107, 44, 0.08);
  padding: 8px 14px;
  font-size: 13.5px;
  line-height: 1.5;
  color: var(--cream);
}

/* ---------- 结尾行动 ---------- */
.page-about .about-cta {
  margin-top: 26px;
  padding-top: 24px;
  border-top: 1px solid var(--about-rule-strong);
}

.page-about .about-cta__lead {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.1em;
  color: var(--mist);
  max-width: none;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 16px;
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-about .about-figure--wide img {
    aspect-ratio: 16 / 6;
  }
}

@media (min-width: 760px) {
  .page-about .about-people {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-about .about-steps li {
    padding: 18px 22px 4px 0;
  }

  .page-about .about-steps li + li {
    padding-left: 22px;
    border-left: 1px solid rgba(110, 139, 128, 0.28);
  }

  .page-about .about-team {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
  }
}

@media (min-width: 880px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    gap: clamp(28px, 4vw, 56px);
  }
}

@media (min-width: 920px) {
  .page-about .about-shell {
    grid-template-columns: var(--about-note) minmax(0, 1fr);
    gap: clamp(28px, 5vw, 64px);
    align-items: start;
  }

  .page-about .about-rail {
    display: block;
    position: sticky;
    top: calc(var(--header-h) + 28px);
    padding-left: 16px;
    border-left: 1px solid var(--about-rule-strong);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-rail__list a {
    transition: none;
  }
}
<<<END>>>