.page-about {
  --about-gap: clamp(56px, 9vw, 128px);
  --about-aside: 240px;
  padding-bottom: clamp(64px, 10vw, 132px);
}

.page-about .breadcrumb {
  margin-top: clamp(18px, 3vw, 28px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-top: clamp(24px, 4vw, 48px);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 5vw, 52px);
  align-items: end;
}

.page-about .about-hero__title {
  margin: 18px 0 22px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.5rem, 7.4vw, 5.2rem);
  line-height: 0.96;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-about .about-hero__hl {
  color: var(--orange);
  white-space: nowrap;
}

.page-about .about-hero__lead {
  max-width: 54ch;
}

.page-about .about-hero__note {
  margin-top: 20px;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.7;
  letter-spacing: 0.04em;
  color: var(--muted);
  border-left: 2px solid var(--orange);
  padding-left: 14px;
}

.page-about .about-hero__figure {
  border-radius: 64px 18px 56px 22px;
  overflow: hidden;
}

.page-about .about-hero__figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.18fr) minmax(0, 0.82fr);
  }
  .page-about .about-hero__figure {
    aspect-ratio: 4 / 5;
  }
}

/* ---------- 章节骨架 ---------- */
.page-about .chapter {
  margin-top: var(--about-gap);
  padding-top: clamp(24px, 3.4vw, 40px);
  border-top: 1px solid var(--line);
}

.page-about .chapter__head {
  display: grid;
  gap: 14px;
  max-width: 100%;
}

.page-about .chapter__no {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--orange);
}

.page-about .chapter__lead {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(1.85rem, 4.8vw, 3.4rem);
  line-height: 1.14;
  letter-spacing: -0.005em;
  color: var(--white);
  max-width: 24ch;
  transform-origin: left center;
  transition: transform 0.6s var(--ease);
}

.page-about .chapter__head.is-inview .chapter__lead {
  transform: scale(1.022);
}

.page-about .chapter__cols {
  margin-top: clamp(22px, 3.4vw, 38px);
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 46px);
}

@media (min-width: 880px) {
  .page-about .chapter__cols {
    grid-template-columns: minmax(0, 62ch) var(--about-aside);
    justify-content: start;
  }
}

.page-about .chapter__aside {
  padding-left: 16px;
  border-left: 1px solid var(--line);
  align-self: start;
}

.page-about .chapter__aside-t {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--mint);
}

.page-about .chapter__aside-list {
  margin: 0 0 16px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}

.page-about .chapter__aside-k {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--orange-soft);
}

/* ---------- 三条原则 ---------- */
.page-about .principles {
  margin-top: clamp(24px, 4vw, 42px);
  display: grid;
  gap: 14px;
}

.page-about .principle {
  position: relative;
  padding: clamp(20px, 2.8vw, 30px);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease);
}

.page-about .principle:hover {
  border-color: var(--orange-soft);
  transform: translateY(-3px);
}

.page-about .principle--last {
  background: linear-gradient(150deg, rgba(255, 90, 31, 0.14), rgba(13, 14, 16, 0));
  border-color: rgba(255, 90, 31, 0.42);
}

.page-about .principle__no {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--orange-soft);
}

.page-about .principle__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.25rem, 2.4vw, 1.6rem);
  line-height: 1.25;
  color: var(--white);
}

.page-about .principle__body {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
  max-width: 56ch;
}

@media (min-width: 780px) {
  .page-about .principle:nth-child(even) {
    margin-left: clamp(24px, 6vw, 88px);
  }
}

/* ---------- 版本路线 ---------- */
.page-about .route__fig {
  margin-top: clamp(24px, 3.6vw, 40px);
}

.page-about .route {
  margin-top: clamp(24px, 4vw, 44px);
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3vw, 40px);
}

.page-about .route__scale {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 8px;
  scrollbar-width: thin;
}

.page-about .route__tick {
  flex: 0 0 auto;
  padding: 7px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--muted);
  text-decoration: none;
  border: 1px solid var(--line);
  border-radius: 999px;
  white-space: nowrap;
  transition: color 0.2s var(--ease), background 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .route__tick:hover,
.page-about .route__tick:focus-visible {
  color: var(--ink);
  background: var(--orange-soft);
  border-color: var(--orange-soft);
}

.page-about .route__tick--hot {
  color: var(--orange);
  border-color: rgba(255, 90, 31, 0.5);
}

.page-about .route__list {
  display: grid;
  gap: 12px;
}

.page-about .route__item {
  padding: clamp(18px, 2.6vw, 28px);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  scroll-margin-top: 90px;
}

.page-about .route__item h3 {
  margin: 8px 0 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.2rem, 2.3vw, 1.55rem);
  line-height: 1.25;
  color: var(--white);
}

.page-about .route__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
  max-width: 58ch;
}

.page-about .route__ver {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--mint);
}

.page-about .route__item--hot {
  background: linear-gradient(150deg, #FF5A1F 0%, #FF8A4D 100%);
  border-color: transparent;
}

.page-about .route__item--hot h3 {
  color: var(--ink);
}

.page-about .route__item--hot p {
  color: #2A0F04;
}

.page-about .route__item--hot .route__ver {
  color: #3A1A0C;
}

@media (min-width: 900px) {
  .page-about .route {
    grid-template-columns: 108px minmax(0, 1fr);
    align-items: start;
  }
  .page-about .route__scale {
    flex-direction: column;
    overflow: visible;
    padding: 0 0 0 16px;
    border-left: 1px solid var(--line);
    position: sticky;
    top: 32px;
  }
  .page-about .route__tick {
    border-radius: 0;
    border-color: transparent;
    border-left: 2px solid transparent;
    padding: 4px 8px;
    margin-left: -17px;
    background: none;
  }
  .page-about .route__tick:hover,
  .page-about .route__tick:focus-visible {
    background: none;
    color: var(--orange);
    border-left-color: var(--orange);
  }
  .page-about .route__tick--hot {
    color: var(--orange);
    border-color: transparent;
  }
}

/* ---------- 团队 ---------- */
.page-about .team__fig {
  margin-top: clamp(24px, 3.6vw, 40px);
}

.page-about .team {
  margin-top: clamp(20px, 3vw, 28px);
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .team__block {
  padding: clamp(20px, 3vw, 30px);
  display: grid;
  gap: 8px;
  align-content: start;
  border-radius: 34px 14px 40px 18px;
  transition: transform 0.3s var(--ease), border-radius 0.5s var(--ease);
}

.page-about .team__block:nth-child(even) {
  border-radius: 16px 38px 18px 42px;
}

.page-about .team__block:hover {
  transform: translateY(-4px);
  border-radius: 42px 20px 34px 26px;
}

.page-about .team__block--a {
  background: var(--float);
  border: 1px solid var(--line);
}

.page-about .team__block--b {
  background: var(--teal-deep);
  border: 1px solid #17453a;
}

.page-about .team__block--c {
  background: var(--orange-deep);
  border: 1px solid #5a2a12;
}

.page-about .team__block--d {
  background: var(--panel);
  border: 1px solid var(--line);
}

.page-about .team__k {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--mint);
}

.page-about .team__block--c .team__k {
  color: var(--amber);
}

.page-about .team__block--a .team__k,
.page-about .team__block--d .team__k {
  color: var(--orange-soft);
}

.page-about .team__name {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.25rem, 2.4vw, 1.6rem);
  line-height: 1.2;
  color: var(--white);
}

.page-about .team__duty {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .team__block--b .team__duty {
  color: #9FC4B9;
}

.page-about .team__block--c .team__duty {
  color: #D8B49F;
}

.page-about .team__duty a {
  color: var(--orange-soft);
  text-decoration: underline;
  text-underline-offset: 3px;
}

@media (min-width: 760px) {
  .page-about .team {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .team__block--a,
  .page-about .team__block--d {
    margin-top: 18px;
  }
  .page-about .team__block--b,
  .page-about .team__block--c {
    margin-bottom: 18px;
  }
}

/* ---------- 规模仪表 ---------- */
.page-about .stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  align-content: start;
}

.page-about .stat {
  display: grid;
  gap: 6px;
  align-content: end;
  min-height: 116px;
  padding: clamp(14px, 2.2vw, 22px);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
}

.page-about .stat--hot {
  background: linear-gradient(150deg, #FF5A1F, #FF8A4D);
  border-color: transparent;
}

.page-about .stat__v {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.7rem, 4.2vw, 2.5rem);
  line-height: 1;
  color: var(--white);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}

.page-about .stat--hot .stat__v {
  color: var(--ink);
}

.page-about .stat__u {
  font-size: 0.5em;
  letter-spacing: 0.04em;
  margin-left: 2px;
}

.page-about .stat__k {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.page-about .stat--hot .stat__k {
  color: #3A1A0C;
}

@media (min-width: 700px) {
  .page-about .stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .stat--hot {
    grid-column: span 2;
  }
}

/* ---------- 内容合作 ---------- */
.page-about .collab {
  padding: clamp(24px, 4.4vw, 52px);
  background: linear-gradient(145deg, #101B19 0%, #0C2C25 100%);
  border: 1px solid #17453A;
  border-radius: var(--radius);
}

.page-about .collab__lead {
  margin: 12px 0 18px;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(1.7rem, 4.2vw, 3rem);
  line-height: 1.16;
  color: var(--white);
  max-width: 22ch;
}

.page-about .collab__body {
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: #A9C6BE;
  max-width: 60ch;
}

.page-about .collab__steps {
  margin: clamp(20px, 3vw, 32px) 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-about .collab__step {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px dashed #1C5245;
  font-size: 15px;
  color: var(--white);
}

.page-about .collab__step-no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--mint);
  flex: 0 0 auto;
}

.page-about .collab__actions {
  margin-top: clamp(22px, 3vw, 32px);
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

@media (min-width: 820px) {
  .page-about .collab__steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(24px, 4vw, 48px);
  }
}

/* ---------- 动效收敛 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .chapter__lead,
  .page-about .principle,
  .page-about .team__block {
    transition: none;
  }
  .page-about .chapter__head.is-inview .chapter__lead {
    transform: none;
  }
  .page-about .principle:hover,
  .page-about .team__block:hover {
    transform: none;
  }
}
<<<END>>>