.page-about {
  background: var(--night);
  color: var(--white);
  overflow-x: hidden;
}

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

.page-about figure {
  margin: 0;
}

.page-about .about-crumb-wrap {
  padding-top: clamp(14px, 2.4vw, 26px);
}

.page-about .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--mist);
}

.page-about .breadcrumb li {
  display: inline-flex;
  align-items: center;
}

.page-about .breadcrumb li + li::before {
  content: "/";
  margin-right: 10px;
  color: var(--line);
}

.page-about .breadcrumb a {
  color: var(--mist);
  text-decoration: none;
  transition: color .16s var(--ease);
}

.page-about .breadcrumb a:hover {
  color: var(--cyan);
}

.page-about .breadcrumb [aria-current="page"] {
  color: var(--white);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  padding-block: clamp(22px, 4vw, 44px) clamp(36px, 6vw, 76px);
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(120% 90% at 82% 0%, rgba(10, 42, 32, .85), transparent 62%),
    linear-gradient(180deg, var(--night), var(--pitch));
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--line) 1px, transparent 1px);
  background-size: 76px 76px;
  opacity: .32;
  pointer-events: none;
  -webkit-mask-image: linear-gradient(125deg, #000 10%, transparent 72%);
  mask-image: linear-gradient(125deg, #000 10%, transparent 72%);
}

.page-about .about-hero-grid {
  position: relative;
  display: grid;
  gap: clamp(22px, 4vw, 44px);
  align-items: end;
}

.page-about .eyebrow {
  color: var(--volt);
  letter-spacing: .18em;
  text-transform: uppercase;
  font-size: 12px;
  margin: 0 0 12px;
}

.page-about .about-hero-copy h1 {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(2.1rem, 6.4vw, 4.4rem);
  line-height: 1.04;
  letter-spacing: -.01em;
  margin: 0 0 18px;
  text-wrap: balance;
}

.page-about .about-lede {
  max-width: 56ch;
  margin: 0;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-hero-meta {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(20px, 3vw, 30px);
  border: 1px solid var(--line);
  background: var(--line);
}

.page-about .meta-item {
  padding: 14px 12px 16px;
  background: rgba(3, 17, 11, .82);
}

.page-about .meta-num {
  display: block;
  font-size: clamp(1.15rem, 2.6vw, 1.7rem);
  color: var(--volt);
  line-height: 1.2;
}

.page-about .meta-label {
  display: block;
  margin-top: 4px;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--mist);
}

.page-about .about-hero-figure {
  position: relative;
  border: 1px solid var(--line);
  background: var(--stand);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
}

.page-about .about-hero-figure img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  filter: saturate(1.05) contrast(1.05);
}

.page-about .about-hero-figure::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(200deg, transparent 42%, rgba(3, 17, 11, .82));
  pointer-events: none;
}

.page-about .hero-figure-cap {
  position: absolute;
  left: 14px;
  bottom: 12px;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--white);
}

.page-about .hero-figure-cap .data {
  color: var(--volt);
  font-size: 11px;
  letter-spacing: .14em;
}

/* ---------- 时间轴 ---------- */

.page-about .about-timeline {
  padding-block: clamp(40px, 6vw, 88px);
  background: linear-gradient(180deg, var(--pitch), var(--night) 92%);
  border-bottom: 1px solid var(--line);
}

.page-about .section-head {
  max-width: 60ch;
  margin-bottom: clamp(24px, 4vw, 46px);
}

.page-about .section-head h2 {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.65rem, 3.6vw, 2.7rem);
  line-height: 1.1;
  margin: 0 0 12px;
  letter-spacing: -.005em;
}

.page-about .section-head p {
  margin: 0;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.85;
}

.page-about .timeline-layout {
  display: grid;
  gap: 16px;
}

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

.page-about .year-rail ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 2px;
}

.page-about .year-rail a {
  display: block;
  padding: 6px 0 6px 10px;
  border-left: 2px solid var(--line);
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-size: 15px;
  color: var(--mist);
  text-decoration: none;
  transition: color .16s var(--ease), border-color .16s var(--ease);
}

.page-about .year-rail a:hover,
.page-about .year-rail a:focus-visible {
  color: var(--volt);
  border-left-color: var(--volt);
}

.page-about .rail-title {
  display: block;
  margin-bottom: 10px;
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--line);
  text-transform: uppercase;
}

.page-about .timeline-track {
  display: grid;
  gap: clamp(14px, 2vw, 22px);
}

.page-about .tl-node {
  position: relative;
  padding: 18px 18px 20px;
  border: 1px solid var(--line);
  border-left: 4px solid var(--volt);
  background: linear-gradient(150deg, rgba(10, 42, 32, .96), rgba(6, 24, 38, .92));
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
  transition: transform .18s var(--ease), border-color .18s var(--ease), background .18s var(--ease);
}

.page-about .tl-node:hover {
  transform: translateY(-4px);
  border-color: var(--volt);
  background: linear-gradient(150deg, rgba(10, 42, 32, 1), rgba(6, 24, 38, .96));
}

.page-about .tl-node--amber {
  border-left-color: var(--amber);
}

.page-about .tl-node--amber:hover {
  border-color: var(--amber);
}

.page-about .tl-node--cyan {
  border-left-color: var(--cyan);
}

.page-about .tl-node--cyan:hover {
  border-color: var(--cyan);
}

.page-about .tl-year {
  font-size: clamp(1.7rem, 5vw, 2.6rem);
  font-weight: 700;
  line-height: 1;
  color: var(--volt);
  letter-spacing: -.02em;
}

.page-about .tl-node--amber .tl-year {
  color: var(--amber);
}

.page-about .tl-node--cyan .tl-year {
  color: var(--cyan);
}

.page-about .tl-body h3 {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(1.1rem, 2.2vw, 1.4rem);
  line-height: 1.28;
  margin: 10px 0 8px;
  color: var(--white);
}

.page-about .tl-body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .tl-notes {
  margin: 12px 0 0;
  padding: 10px 0 0;
  list-style: none;
  border-top: 1px dashed var(--line);
  display: grid;
  gap: 6px;
}

.page-about .tl-notes li {
  position: relative;
  padding-left: 16px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--cyan);
}

.page-about .tl-notes li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 7px;
  height: 1px;
  background: var(--cyan);
}

/* ---------- 团队 ---------- */

.page-about .about-team {
  padding-block: clamp(40px, 6vw, 88px);
  border-bottom: 1px solid var(--line);
  background: var(--night);
}

.page-about .team-split {
  display: grid;
  gap: clamp(18px, 3vw, 34px);
  align-items: start;
}

.page-about .team-figure {
  position: relative;
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%);
}

.page-about .team-figure img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .team-groups {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .group-block {
  padding: 18px 16px 20px;
  background: var(--stand);
  transition: background .18s var(--ease);
}

.page-about .group-block:hover {
  background: var(--pitch);
}

.page-about .group-num {
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--amber);
}

.page-about .group-block h3 {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.1rem;
  margin: 6px 0 8px;
  color: var(--white);
}

.page-about .group-block p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .flow-strip {
  margin: clamp(22px, 3.4vw, 38px) 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .flow-step {
  padding: 18px 16px 20px;
  background: linear-gradient(160deg, rgba(10, 42, 32, .9), rgba(3, 17, 11, .95));
}

.page-about .flow-time {
  display: inline-block;
  padding: 3px 8px;
  font-size: 11.5px;
  letter-spacing: .08em;
  color: var(--night);
  background: var(--volt);
}

.page-about .flow-step h4 {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.05rem;
  margin: 12px 0 6px;
  color: var(--white);
}

.page-about .flow-step p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .flow-note {
  margin: 16px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--amber);
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 协作 ---------- */

.page-about .about-collab {
  padding-block: clamp(40px, 6vw, 88px);
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(115deg, rgba(10, 42, 32, .95), rgba(3, 17, 11, .98)),
    var(--pitch);
}

.page-about .collab-grid {
  display: grid;
  gap: clamp(22px, 4vw, 48px);
  align-items: start;
}

.page-about .collab-copy h2 {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.65rem, 3.6vw, 2.6rem);
  line-height: 1.1;
  margin: 0 0 14px;
}

.page-about .collab-copy p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .collab-stats {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .collab-stats li {
  padding: 14px 10px;
  background: rgba(6, 24, 38, .8);
  text-align: center;
}

.page-about .stat-num {
  display: block;
  font-size: clamp(1.5rem, 3.4vw, 2.1rem);
  color: var(--cyan);
  line-height: 1.1;
}

.page-about .stat-label {
  display: block;
  margin-top: 4px;
  font-size: 12px;
  color: var(--mist);
}

.page-about .collab-link-line a,
.page-about .closing-note a {
  color: var(--volt);
  text-decoration: none;
  border-bottom: 1px solid rgba(201, 255, 63, .45);
  transition: color .16s var(--ease), border-color .16s var(--ease);
}

.page-about .collab-link-line a:hover,
.page-about .closing-note a:hover {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-about .collab-reports {
  padding: clamp(18px, 3vw, 26px);
  border: 1px solid var(--line);
  background: rgba(3, 17, 11, .72);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 24px), calc(100% - 24px) 100%, 0 100%);
}

.page-about .reports-title {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: .02em;
  margin: 0 0 14px;
  color: var(--white);
}

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

.page-about .report-list li {
  display: grid;
  grid-template-columns: 30px 1fr;
  grid-template-areas:
    "num name"
    "num desc";
  gap: 2px 10px;
  padding: 12px 12px 13px;
  background: var(--stand);
  transition: background .18s var(--ease);
}

.page-about .report-list li:hover {
  background: var(--pitch);
}

.page-about .report-num {
  grid-area: num;
  align-self: center;
  font-size: 13px;
  color: var(--amber);
}

.page-about .report-name {
  grid-area: name;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1rem;
  color: var(--white);
}

.page-about .report-desc {
  grid-area: desc;
  font-size: 13px;
  line-height: 1.65;
  color: var(--mist);
}

.page-about .reports-note {
  margin: 14px 0 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 陪伴感 ---------- */

.page-about .about-moments {
  padding-block: clamp(40px, 6vw, 88px);
  background:
    radial-gradient(90% 70% at 15% 100%, rgba(10, 42, 32, .9), transparent 60%),
    var(--night);
}

.page-about .moment-grid {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .moment {
  position: relative;
  padding: 20px 16px 22px;
  background: rgba(6, 24, 38, .92);
  transition: background .18s var(--ease), transform .18s var(--ease);
}

.page-about .moment:hover {
  background: var(--pitch);
  transform: translateY(-3px);
}

.page-about .moment-num {
  display: inline-block;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--volt);
}

.page-about .moment h3 {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.12rem;
  margin: 10px 0 8px;
  color: var(--white);
}

.page-about .moment p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .closing-grid {
  display: grid;
  gap: clamp(20px, 3.4vw, 40px);
  margin-top: clamp(28px, 4.6vw, 56px);
  padding-top: clamp(24px, 3.6vw, 40px);
  border-top: 1px solid var(--line);
  align-items: start;
}

.page-about .closing-copy h2 {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.5rem, 3.2vw, 2.3rem);
  line-height: 1.14;
  margin: 0 0 14px;
}

.page-about .closing-copy p {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist);
  max-width: 52ch;
}

.page-about .closing-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 16px;
}

.page-about .closing-note {
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
  margin: 0;
}

.page-about .closing-figure {
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}

.page-about .closing-figure img {
  width: 100%;
  aspect-ratio: 5 / 6;
  object-fit: cover;
}

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-about .moment-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 880px) {
  .page-about .about-hero-grid {
    grid-template-columns: 7fr 5fr;
    gap: clamp(28px, 4vw, 56px);
  }

  .page-about .timeline-layout {
    grid-template-columns: 96px minmax(0, 1fr);
    gap: clamp(20px, 3vw, 44px);
  }

  .page-about .year-rail {
    display: block;
    position: sticky;
    top: 118px;
    align-self: start;
    padding-top: 6px;
  }

  .page-about .tl-node--wide {
    max-width: 100%;
  }

  .page-about .tl-node--narrow {
    max-width: 74%;
  }

  .page-about .tl-node--offset {
    margin-left: auto;
  }

  .page-about .tl-node {
    padding: 22px 24px 24px;
  }

  .page-about .team-split {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }

  .page-about .team-groups {
    grid-template-columns: 1.1fr 1fr .9fr;
  }

  .page-about .collab-grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
  }

  .page-about .closing-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
  }
}

@media (min-width: 1080px) {
  .page-about .moment-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .moment {
    padding: 24px 20px 26px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .tl-node,
  .page-about .moment,
  .page-about .group-block {
    transition: opacity .16s var(--ease);
  }

  .page-about .tl-node:hover,
  .page-about .moment:hover {
    transform: none;
  }
}
<<<END>>>