.page-about {
  --about-rail: 200px;
  background: var(--ink);
  color: var(--paper);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  border-bottom: var(--line);
  padding: clamp(2.2rem, 6vw, 4.4rem) 0 clamp(1.8rem, 4.5vw, 3.2rem);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--cyan), rgba(34, 225, 200, 0));
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(90deg, rgba(34, 225, 200, .10), rgba(34, 225, 200, 0) 46%),
    linear-gradient(180deg, rgba(255, 107, 44, .07), rgba(255, 107, 44, 0) 60%);
}

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

.page-about .about-hero .breadcrumb {
  margin-bottom: clamp(1.3rem, 3.4vw, 2.1rem);
}

.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.85rem, 6.2vw, 3.5rem);
  line-height: 1.1;
  letter-spacing: .01em;
  margin: .55rem 0 0;
  max-width: 24ch;
  color: var(--paper);
}

.page-about .about-hero .lead {
  margin: clamp(1rem, 2.4vw, 1.4rem) 0 0;
  max-width: 40em;
  font-size: clamp(.97rem, 1.9vw, 1.08rem);
  line-height: 1.85;
  color: var(--mist);
}

/* ---------- 横向数据带 ---------- */
.page-about .about-ticker {
  background: var(--ink-deep);
  border-bottom: var(--hair);
  overflow-x: auto;
  overflow-y: hidden;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-ticker__list {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  width: max-content;
}

.page-about .about-ticker__list li {
  flex: 0 0 auto;
  padding: .95rem clamp(1rem, 2.4vw, 1.9rem);
  border-right: var(--hair);
  font-size: .82rem;
  color: var(--mist);
  white-space: nowrap;
}

.page-about .about-ticker__list li .mono {
  color: var(--gold);
  font-size: 1.02rem;
  margin-right: .35rem;
}

/* ---------- 主框架 ---------- */
.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  padding-bottom: clamp(2.8rem, 7vw, 5.2rem);
}

.page-about .about-rail {
  padding-top: clamp(1.6rem, 4.5vw, 2.4rem);
  border-bottom: var(--hair);
}

.page-about .about-rail__title {
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--mist);
  margin: 0 0 .85rem;
}

.page-about .about-rail__list {
  display: flex;
  gap: .6rem;
  list-style: none;
  margin: 0;
  padding: 0 0 1.1rem;
  overflow-x: auto;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-rail__list li {
  flex: 0 0 auto;
}

.page-about .about-rail__list a {
  display: block;
  min-width: 136px;
  padding: .6rem .8rem;
  background: var(--ink-2);
  border: 1px solid var(--grid);
  color: var(--mist);
  text-decoration: none;
  transition: border-color .2s ease, color .2s ease, background .2s ease;
}

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

.page-about .about-rail__year {
  display: block;
  font-size: .7rem;
  letter-spacing: .08em;
  color: var(--orange);
}

.page-about .about-rail__label {
  display: block;
  font-size: .84rem;
  margin-top: .18rem;
  color: inherit;
}

/* ---------- 内容流 ---------- */
.page-about .about-flow {
  display: flex;
  flex-direction: column;
  gap: clamp(2.8rem, 6.5vw, 5rem);
  padding-top: clamp(2.2rem, 5.5vw, 3.6rem);
  min-width: 0;
}

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

.page-about .about-sec__head {
  max-width: 64ch;
  margin-bottom: clamp(1.4rem, 3.4vw, 2.2rem);
}

.page-about .about-sec__head h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.55rem, 4.2vw, 2.45rem);
  line-height: 1.16;
  letter-spacing: .01em;
  margin: .5rem 0 .7rem;
  color: var(--paper);
}

.page-about .about-sec__intro {
  margin: 0;
  max-width: 40em;
  font-size: .96rem;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-sec__foot {
  margin: clamp(1.3rem, 3vw, 1.9rem) 0 0;
  padding-left: 1rem;
  border-left: 2px solid var(--gold);
  font-size: .92rem;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 时间轴阶段 ---------- */
.page-about .phase-list {
  list-style: none;
  margin: 0;
  padding: 0;
  max-width: 780px;
  display: flex;
  flex-direction: column;
  gap: 1px;
  background: var(--grid-soft);
  border: var(--hair);
}

.page-about .phase {
  background: var(--ink-2);
  border-left: 3px solid var(--grid);
  padding: clamp(1.05rem, 3vw, 1.6rem) clamp(1.05rem, 3vw, 1.8rem);
  scroll-margin-top: calc(var(--header-h) + 1.2rem);
  transition: border-color .25s ease, background .25s ease;
}

.page-about .phase:hover {
  border-left-color: var(--cyan);
  background: #16314b;
}

.page-about .phase__mark {
  margin: 0 0 .3rem;
  font-size: .78rem;
  letter-spacing: .1em;
  color: var(--orange);
}

.page-about .phase__title {
  margin: 0 0 .5rem;
  font-size: clamp(1.02rem, 2.4vw, 1.2rem);
  font-weight: 700;
  color: var(--paper);
}

.page-about .phase__text {
  margin: 0;
  max-width: 42em;
  font-size: .93rem;
  line-height: 1.78;
  color: var(--mist);
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 0;
  border: var(--hair);
  background: var(--ink-2);
  overflow: hidden;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
  filter: saturate(.85);
}

.page-about .about-figure__cap {
  display: block;
  padding: .8rem 1rem;
  border-top: var(--hair);
  font-family: var(--font-serif);
  font-size: .88rem;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 生产三步 ---------- */
.page-about .pipe {
  list-style: none;
  margin: clamp(1.4rem, 3.4vw, 2rem) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--grid-soft);
  border: var(--hair);
}

.page-about .pipe__step {
  background: var(--ink);
  padding: clamp(1.1rem, 3vw, 1.6rem);
  position: relative;
}

.page-about .pipe__num {
  display: block;
  font-size: 1.5rem;
  line-height: 1;
  color: var(--cyan);
  opacity: .85;
  margin-bottom: .7rem;
}

.page-about .pipe__title {
  margin: 0 0 .45rem;
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--paper);
}

.page-about .pipe__text {
  margin: 0;
  font-size: .92rem;
  line-height: 1.78;
  color: var(--mist);
}

/* ---------- 呼吸区 ---------- */
.page-about .about-breath {
  position: relative;
  margin: 0;
  border-top: var(--hair);
  border-bottom: var(--hair);
  overflow: hidden;
}

.page-about .about-breath img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 12 / 5;
  object-fit: cover;
  filter: saturate(.7) contrast(1.05);
}

.page-about .about-breath::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(11, 26, 43, .6), rgba(11, 26, 43, .12) 42%, rgba(11, 26, 43, .62));
}

/* ---------- 覆盖版图 ---------- */
.page-about .coverage {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.2rem, 3vw, 2rem);
}

.page-about .sport-tags {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--grid-soft);
  border: var(--hair);
}

.page-about .sport-tags__item {
  background: var(--ink);
  padding: .95rem .7rem;
  text-align: center;
  font-size: .92rem;
  color: var(--paper);
  border-left: 2px solid var(--grid);
  transition: background .2s ease, color .2s ease, border-color .2s ease;
}

.page-about .sport-tags__item:hover {
  background: var(--ink-2);
  color: var(--cyan);
  border-left-color: var(--cyan);
}

.page-about .sport-tags__item:nth-child(3n+1) { border-left-color: var(--moss); }
.page-about .sport-tags__item:nth-child(3n+2) { border-left-color: var(--clay); }
.page-about .sport-tags__item:nth-child(3n) { border-left-color: var(--gold); }

.page-about .coverage__fig {
  margin: 0;
  border: var(--hair);
  background: var(--ink-2);
  overflow: hidden;
}

.page-about .coverage__fig img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 5 / 4;
  object-fit: cover;
}

/* ---------- 团队 ---------- */
.page-about .team-bar {
  border: var(--hair);
  background: var(--ink-2);
  padding: clamp(1.1rem, 3vw, 1.6rem);
}

.page-about .team-bar__row {
  display: flex;
  height: 46px;
  border: 1px solid var(--grid);
  background: var(--ink);
}

.page-about .team-bar__seg {
  width: var(--w);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .86rem;
  overflow: hidden;
}

.page-about .team-bar__seg--verify {
  background: var(--cyan);
  color: var(--cyan-ink);
}

.page-about .team-bar__seg--rest {
  background: var(--ink-2);
  color: var(--mist);
  border-left: 1px solid var(--grid);
}

.page-about .team-bar__legend {
  list-style: none;
  margin: 1rem 0 0;
  padding: 0;
  display: grid;
  gap: .6rem;
  font-size: .88rem;
  color: var(--mist);
}

.page-about .team-bar__legend li {
  display: flex;
  align-items: center;
  gap: .5rem;
}

.page-about .team-bar__legend .mono {
  color: var(--gold);
}

.page-about .team-bar__dot {
  width: 9px;
  height: 9px;
  flex: 0 0 auto;
}

.page-about .team-bar__dot--verify { background: var(--cyan); }
.page-about .team-bar__dot--rest { background: var(--ink-2); border: 1px solid var(--grid); }

.page-about .team-roles {
  list-style: none;
  margin: clamp(1.3rem, 3vw, 1.9rem) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--grid-soft);
  border: var(--hair);
}

.page-about .team-role {
  background: var(--ink);
  padding: clamp(1rem, 2.8vw, 1.4rem);
  border-top: 2px solid transparent;
  transition: border-color .2s ease;
}

.page-about .team-role:hover {
  border-top-color: var(--cyan);
}

.page-about .team-role h3 {
  margin: 0 0 .45rem;
  font-size: 1rem;
  font-weight: 700;
  color: var(--paper);
}

.page-about .team-role p {
  margin: 0;
  font-size: .9rem;
  line-height: 1.78;
  color: var(--mist);
}

/* ---------- 合作生态 ---------- */
.page-about .coop-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--grid-soft);
  border: var(--hair);
}

.page-about .coop {
  background: var(--ink-2);
  padding: clamp(1.1rem, 3vw, 1.6rem);
  position: relative;
}

.page-about .coop::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 42px;
  height: 2px;
  background: var(--moss);
}

.page-about .coop h3 {
  margin: 0 0 .55rem;
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--paper);
}

.page-about .coop p {
  margin: 0;
  font-size: .91rem;
  line-height: 1.78;
  color: var(--mist);
}

/* ---------- 做事方式 ---------- */
.page-about .principles {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1rem, 2.6vw, 1.6rem);
}

.page-about .principle {
  padding-left: 1.1rem;
  border-left: 2px solid var(--grid);
  transition: border-color .2s ease;
}

.page-about .principle:hover {
  border-left-color: var(--orange);
}

.page-about .principle__num {
  display: block;
  font-size: .8rem;
  letter-spacing: .12em;
  color: var(--gold);
  margin-bottom: .4rem;
}

.page-about .principle h3 {
  margin: 0 0 .5rem;
  font-family: var(--font-serif);
  font-size: clamp(1.05rem, 2.4vw, 1.2rem);
  font-weight: 700;
  color: var(--paper);
}

.page-about .principle p {
  margin: 0;
  max-width: 38em;
  font-size: .92rem;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  position: relative;
  border: var(--hair);
  background: linear-gradient(135deg, var(--ink-2), var(--ink));
  padding: clamp(1.5rem, 4vw, 2.6rem);
}

.page-about .about-cta::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--cyan), var(--orange));
}

.page-about .about-cta h2 {
  margin: 0 0 .7rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.35rem, 3.6vw, 2rem);
  line-height: 1.2;
  color: var(--paper);
}

.page-about .about-cta p {
  margin: 0;
  max-width: 44em;
  font-size: .95rem;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: .7rem;
  margin-top: clamp(1rem, 2.6vw, 1.5rem);
}

/* ---------- 断点 ---------- */
@media (min-width: 560px) {
  .page-about .sport-tags {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 720px) {
  .page-about .pipe {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .team-roles {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .coop-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 860px) {
  .page-about .coverage {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    align-items: start;
  }
  .page-about .principles {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 1040px) {
  .page-about .about-body {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: clamp(1.6rem, 3.5vw, 3.4rem);
  }

  .page-about .about-rail {
    padding-top: clamp(2.6rem, 5vw, 3.8rem);
    border-bottom: 0;
  }

  .page-about .about-rail__sticky {
    position: sticky;
    top: calc(var(--header-h) + 1.6rem);
  }

  .page-about .about-rail__list {
    display: block;
    overflow: visible;
    padding: 0;
  }

  .page-about .about-rail__list li {
    display: block;
  }

  .page-about .about-rail__list a {
    position: relative;
    display: block;
    min-width: 0;
    background: transparent;
    border: 0;
    border-left: 1px solid var(--grid-soft);
    padding: .6rem 0 .6rem 1.3rem;
    color: var(--mist);
    transition: color .2s ease, border-color .2s ease;
  }

  .page-about .about-rail__list a::before {
    content: "";
    position: absolute;
    left: -4px;
    top: .72rem;
    width: 7px;
    height: 7px;
    background: var(--ink);
    border: 1px solid var(--grid);
    border-radius: 50%;
    transition: border-color .2s ease, background .2s ease;
  }

  .page-about .about-rail__list a:hover {
    border-left-color: var(--cyan);
    color: var(--cyan);
  }

  .page-about .about-rail__list a:hover::before {
    background: var(--cyan);
    border-color: var(--cyan);
  }
}

@media (min-width: 1240px) {
  .page-about {
    --about-rail: 224px;
  }
  .page-about .team-roles {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .phase,
  .page-about .about-rail__list a,
  .page-about .sport-tags__item,
  .page-about .team-role,
  .page-about .principle {
    transition: none;
  }
}
<<<END>>>

.page-about {
  --w: 1rem;
}