.page-about {
  background: var(--c-rice);
  color: var(--c-ink);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  background: var(--c-green-deep);
  padding-block: clamp(6.5rem, 18vw, 10rem) clamp(2.5rem, 6vw, 4.5rem);
}

.page-about .about-hero__media {
  position: absolute;
  inset: 0;
  z-index: -2;
}

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

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(152deg, rgba(18, 63, 46, 0.96) 4%, rgba(27, 111, 158, 0.58) 52%, rgba(11, 31, 24, 0.97) 100%);
}

.page-about .about-hero__inner {
  display: grid;
  gap: clamp(0.85rem, 3vw, 1.4rem);
  color: var(--c-rice);
  max-width: 62rem;
}

.page-about .about-hero__crumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: var(--fs-12);
  letter-spacing: 0.08em;
}

.page-about .about-hero__crumb li {
  color: rgba(247, 244, 234, 0.7);
}

.page-about .about-hero__crumb li + li::before {
  content: "/";
  margin-right: 0.5rem;
  color: rgba(247, 244, 234, 0.4);
}

.page-about .about-hero__crumb a {
  color: var(--c-rice);
  text-decoration: none;
  border-bottom: 1px solid rgba(247, 244, 234, 0.45);
}

.page-about .about-hero__crumb a:hover {
  border-bottom-color: var(--c-orange);
}

.page-about .about-hero__kicker {
  margin: 0;
  font-size: var(--fs-12);
  font-weight: 700;
  letter-spacing: 0.24em;
  color: var(--c-orange);
}

.page-about .about-hero h1 {
  margin: 0;
  max-width: 22ch;
  font-size: clamp(2.05rem, 7vw, 4.3rem);
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: -0.025em;
  color: var(--c-rice);
}

.page-about .about-hero__lede {
  margin: 0;
  max-width: 46ch;
  font-size: clamp(1rem, 2.4vw, 1.15rem);
  line-height: 1.78;
  color: rgba(247, 244, 234, 0.9);
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(0.75rem, 3vw, 1.4rem) 0 0;
  padding: 0;
  list-style: none;
  max-width: 42rem;
  background: rgba(220, 239, 247, 0.2);
  border: 1px solid rgba(220, 239, 247, 0.22);
  border-radius: var(--r-m);
  overflow: hidden;
}

.page-about .about-fact {
  display: grid;
  gap: 0.3rem;
  padding: 0.9rem 1rem;
  background: rgba(11, 31, 24, 0.46);
}

.page-about .about-fact__num {
  font-size: clamp(1.35rem, 4.2vw, 1.85rem);
  font-weight: 700;
  line-height: 1;
  color: var(--c-rice);
}

.page-about .about-fact__label {
  font-size: var(--fs-12);
  letter-spacing: 0.06em;
  color: rgba(247, 244, 234, 0.72);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 0.35rem;
}

.page-about .about-hero .btn--ghost {
  color: var(--c-rice);
  border-color: rgba(247, 244, 234, 0.5);
}

.page-about .about-hero .btn--ghost:hover {
  color: var(--c-green-deep);
  background: var(--c-rice);
}

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

/* ---------- 双栏长文 ---------- */
.page-about .about-main {
  padding-top: clamp(2rem, 6vw, 3.5rem);
}

.page-about .about-layout {
  display: grid;
  gap: clamp(1.5rem, 4vw, 3rem);
}

.page-about .about-rail__title {
  margin: 0 0 0.7rem;
  font-size: var(--fs-12);
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--c-green);
}

.page-about .about-rail__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-rail__list a {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.45rem 0.75rem;
  border: 1px solid rgba(11, 31, 24, 0.12);
  border-radius: var(--r-pill);
  background: var(--c-paper);
  font-size: var(--fs-14);
  color: var(--c-ink);
  text-decoration: none;
  transition: color 180ms var(--ease), border-color 180ms var(--ease);
}

.page-about .about-rail__list a:hover,
.page-about .about-rail__list a:focus-visible {
  color: var(--c-green-deep);
  border-color: var(--c-green);
}

.page-about .about-rail__list .mono {
  font-size: var(--fs-12);
  color: var(--c-orange);
}

.page-about .about-chapter {
  padding-block: clamp(0.5rem, 2vw, 1rem);
}

.page-about .about-chapter + .about-chapter {
  margin-top: clamp(1.5rem, 4vw, 2.5rem);
  padding-top: clamp(1.5rem, 4vw, 2.5rem);
  border-top: var(--line-soft);
}

.page-about .about-chapter h2 {
  margin: 0 0 1rem;
  font-size: clamp(1.45rem, 4.2vw, 2.15rem);
  line-height: 1.26;
  letter-spacing: -0.012em;
  color: var(--c-green-deep);
}

.page-about .about-chapter .prose {
  max-width: 40rem;
  margin-bottom: 1rem;
  color: var(--c-ink);
}

.page-about .about-chapter .prose:last-child {
  margin-bottom: 0;
}

.page-about .about-quote {
  margin: clamp(1.25rem, 4vw, 1.85rem) 0 0;
  padding: 1.15rem 1.3rem;
  border-left: 4px solid var(--c-orange);
  border-radius: 0 var(--r-m) var(--r-m) 0;
  background: var(--c-sky-mist);
  font-size: var(--fs-18);
  font-weight: 600;
  line-height: 1.6;
  color: var(--c-green-deep);
}

/* ---------- 三步 ---------- */
.page-about .about-steps {
  display: grid;
  gap: 1px;
  margin: clamp(1.25rem, 3.5vw, 1.9rem) 0;
  padding: 0;
  list-style: none;
  background: rgba(11, 31, 24, 0.12);
  border-radius: var(--r-m);
  overflow: hidden;
}

.page-about .about-step {
  display: grid;
  gap: 0.5rem;
  align-content: start;
  padding: 1.15rem 1.1rem 1.3rem;
  background: var(--c-paper);
}

.page-about .about-step__num {
  display: grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  border-radius: var(--r-s);
  background: var(--c-orange);
  color: var(--c-paper);
  font-size: var(--fs-14);
  font-weight: 700;
}

.page-about .about-step__title {
  margin: 0;
  font-size: var(--fs-18);
  color: var(--c-green-deep);
}

.page-about .about-step__text {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.72;
  color: rgba(11, 31, 24, 0.78);
}

/* ---------- 档案图区 ---------- */
.page-about .about-archive {
  margin-top: clamp(1.5rem, 5vw, 3rem);
  padding-block: clamp(2.5rem, 7vw, 4.5rem);
  background: var(--c-green-deep);
  color: var(--c-rice);
}

.page-about .about-archive__grid {
  display: grid;
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: center;
}

.page-about .about-archive__fig {
  margin: 0;
}

.page-about .about-archive__fig img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--r-l);
  object-fit: cover;
}

.page-about .about-archive__fig figcaption {
  margin-top: 0.85rem;
  font-size: var(--fs-12);
  line-height: 1.7;
  letter-spacing: 0.04em;
  color: rgba(247, 244, 234, 0.68);
}

.page-about .about-archive h2 {
  margin: 0 0 1rem;
  color: var(--c-rice);
}

.page-about .about-archive p {
  margin: 0 0 0.9rem;
  max-width: 38rem;
  font-size: var(--fs-16);
  line-height: 1.78;
  color: rgba(247, 244, 234, 0.86);
}

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

/* ---------- 里程碑横带 ---------- */
.page-about .about-mile {
  padding-bottom: clamp(1rem, 3vw, 1.5rem);
}

.page-about .about-mile__head {
  max-width: 44rem;
}

.page-about .about-mile__head h2 {
  margin-block: 0.4rem 0.7rem;
  color: var(--c-green-deep);
}

.page-about .about-mile__head .lede {
  color: rgba(11, 31, 24, 0.75);
}

.page-about .about-band {
  margin-top: clamp(1.25rem, 4vw, 2rem);
  overflow-x: auto;
  overscroll-behavior-x: contain;
  cursor: grab;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-band:active {
  cursor: grabbing;
}

.page-about .about-band__track {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(15rem, 78vw);
  gap: 1rem;
  margin: 0;
  padding: 0.25rem var(--gutter) 1.5rem;
  list-style: none;
  scroll-snap-type: x mandatory;
}

.page-about .about-stop {
  display: grid;
  gap: 0.55rem;
  align-content: start;
  padding: 1.1rem 1.05rem 1.3rem;
  background: var(--c-paper);
  border: var(--line-soft);
  border-top: 3px solid var(--c-sky);
  border-radius: var(--r-m);
  box-shadow: var(--sh-card);
  scroll-snap-align: start;
}

.page-about .about-stop:nth-child(3n + 2) {
  border-top-color: var(--c-green);
}

.page-about .about-stop:nth-child(3n + 3) {
  border-top-color: var(--c-orange);
}

.page-about .about-stop__mark {
  font-size: var(--fs-12);
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--c-sky-deep);
}

.page-about .about-stop h3 {
  margin: 0;
  font-size: var(--fs-16);
  color: var(--c-green-deep);
}

.page-about .about-stop p {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.72;
  color: rgba(11, 31, 24, 0.76);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  padding-top: clamp(2.5rem, 7vw, 4.5rem);
}

.page-about .about-team__grid {
  display: grid;
  gap: clamp(1.75rem, 5vw, 3rem);
}

.page-about .about-team h2 {
  margin: 0.4rem 0 1rem;
  color: var(--c-green-deep);
}

.page-about .about-team__copy .prose {
  max-width: 40rem;
  margin-bottom: clamp(1.25rem, 3vw, 1.75rem);
}

.page-about .about-team__fig {
  margin: 0;
}

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

.page-about .about-ring {
  position: relative;
  width: min(100%, 22rem);
  aspect-ratio: 1 / 1;
  margin: 0 auto clamp(1.5rem, 4vw, 2rem);
}

.page-about .about-ring svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.page-about .about-ring__arc--a {
  stroke: var(--c-green);
}

.page-about .about-ring__arc--b {
  stroke: var(--c-sky);
}

.page-about .about-ring__arc--c {
  stroke: var(--c-orange);
}

.page-about .about-ring__center {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  text-align: center;
  font-size: clamp(1.6rem, 6vw, 2.3rem);
  font-weight: 700;
  line-height: 1;
  color: var(--c-green-deep);
}

.page-about .about-ring__center small {
  display: block;
  margin-top: 0.45rem;
  font-size: var(--fs-12);
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--c-sky-deep);
}

.page-about .about-node {
  position: absolute;
  padding: 0.32rem 0.7rem;
  border: 1px solid rgba(11, 31, 24, 0.12);
  border-radius: var(--r-pill);
  background: var(--c-paper);
  box-shadow: var(--sh-card);
  font-size: var(--fs-12);
  font-weight: 600;
  color: var(--c-green-deep);
  white-space: nowrap;
}

.page-about .about-node--a {
  top: 0;
  left: 50%;
  transform: translate(-50%, -35%);
}

.page-about .about-node--b {
  bottom: 9%;
  left: 0;
}

.page-about .about-node--c {
  bottom: 9%;
  right: 0;
}

.page-about .about-roles {
  display: grid;
  gap: 0.75rem;
}

.page-about .about-role {
  padding: 1rem 1.1rem 1.1rem;
  background: var(--c-paper);
  border: var(--line-soft);
  border-radius: var(--r-m);
  transition: border-color 180ms var(--ease), box-shadow 180ms var(--ease);
}

.page-about .about-role:hover,
.page-about .about-role:focus,
.page-about .about-role:focus-visible {
  border-color: rgba(31, 122, 77, 0.5);
  box-shadow: var(--sh-card);
  outline: none;
}

.page-about .about-role__title {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  margin: 0 0 0.4rem;
  font-size: var(--fs-16);
  color: var(--c-green-deep);
}

.page-about .about-role__count {
  font-size: var(--fs-12);
  letter-spacing: 0.08em;
  color: var(--c-orange);
}

.page-about .about-role__text {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.72;
  color: rgba(11, 31, 24, 0.78);
}

.page-about .about-role__more {
  margin: 0.55rem 0 0;
  padding-top: 0.55rem;
  border-top: 1px dashed rgba(11, 31, 24, 0.16);
  font-size: var(--fs-14);
  line-height: 1.72;
  color: var(--c-sky-deep);
}

/* ---------- 合作生态 ---------- */
.page-about .about-eco {
  margin-top: clamp(2rem, 6vw, 3.5rem);
  padding-block: clamp(3.5rem, 10vw, 6rem) clamp(3rem, 8vw, 5rem);
  background: linear-gradient(158deg, var(--c-green-deep) 0%, #0d3126 62%, var(--c-ink) 100%);
  color: var(--c-rice);
  clip-path: polygon(0 3rem, 100% 0, 100% 100%, 0 100%);
}

.page-about .about-eco__inner {
  display: grid;
  gap: clamp(1.5rem, 4vw, 3rem);
}

.page-about .about-eco .eyebrow {
  color: var(--c-orange);
}

.page-about .about-eco h2 {
  margin: 0.4rem 0 1rem;
  color: var(--c-rice);
}

.page-about .about-eco__head p {
  margin: 0 0 0.9rem;
  max-width: 42rem;
  font-size: var(--fs-16);
  line-height: 1.78;
  color: rgba(247, 244, 234, 0.86);
}

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

.page-about .about-eco__cards {
  display: grid;
  gap: 0.9rem;
}

.page-about .about-eco__card {
  padding: 1.1rem 1.15rem 1.2rem;
  border: 1px solid rgba(220, 239, 247, 0.24);
  border-radius: var(--r-m);
  background: rgba(220, 239, 247, 0.1);
  backdrop-filter: blur(10px);
}

.page-about .about-eco__card h3 {
  margin: 0 0 0.45rem;
  font-size: var(--fs-16);
  color: var(--c-rice);
}

.page-about .about-eco__card p {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.72;
  color: rgba(247, 244, 234, 0.82);
}

/* ---------- 接下来 ---------- */
.page-about .about-future {
  padding-block: clamp(2.5rem, 8vw, 5rem);
}

.page-about .about-future__grid {
  display: grid;
  gap: clamp(1.75rem, 5vw, 3rem);
}

.page-about .about-future h2 {
  margin: 0.4rem 0 0.4rem;
  color: var(--c-green-deep);
}

.page-about .about-road {
  display: grid;
  gap: 1px;
  margin: clamp(1.25rem, 3vw, 1.75rem) 0 0;
  padding: 0;
  list-style: none;
  background: rgba(11, 31, 24, 0.12);
  border-radius: var(--r-m);
  overflow: hidden;
}

.page-about .about-road li {
  display: grid;
  grid-template-columns: 2rem minmax(0, 1fr);
  gap: 0.9rem;
  padding: 1rem 1.1rem 1.1rem;
  background: var(--c-rice);
}

.page-about .about-road .mono {
  padding-top: 0.15rem;
  font-size: var(--fs-14);
  font-weight: 700;
  color: var(--c-orange);
}

.page-about .about-road h3 {
  margin: 0 0 0.3rem;
  font-size: var(--fs-16);
  color: var(--c-green-deep);
}

.page-about .about-road p {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.72;
  color: rgba(11, 31, 24, 0.78);
}

.page-about .about-future__aside {
  display: grid;
  gap: 0.85rem;
  justify-items: start;
  align-content: start;
  padding: 1.35rem 1.25rem 1.5rem;
  border: 1px solid rgba(46, 143, 196, 0.28);
  border-radius: var(--r-l);
  background: linear-gradient(160deg, var(--c-sky-mist) 0%, var(--c-paper) 100%);
}

.page-about .about-future__aside p {
  margin: 0;
  font-size: var(--fs-16);
  font-weight: 600;
  line-height: 1.6;
  color: var(--c-green-deep);
}

/* ---------- 断点 ---------- */
@media (min-width: 600px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-eco__cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-eco__card--wide {
    grid-column: 1 / -1;
  }
}

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

  .page-about .about-band__track {
    grid-auto-columns: 20rem;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__note {
    display: block;
    position: absolute;
    top: 50%;
    right: clamp(1rem, 3vw, 2.5rem);
    transform: translateY(-50%);
    margin: 0;
    writing-mode: vertical-rl;
    font-size: var(--fs-12);
    letter-spacing: 0.52em;
    color: rgba(247, 244, 234, 0.55);
  }

  .page-about .about-archive__grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1fr);
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
  }

  .page-about .about-eco__inner {
    grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
    align-items: start;
  }

  .page-about .about-future__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
  }
}

@media (min-width: 960px) {
  .page-about .about-layout {
    grid-template-columns: 12.5rem minmax(0, 1fr);
    gap: clamp(2rem, 5vw, 4rem);
  }

  .page-about .about-rail {
    position: sticky;
    top: 7.5rem;
    align-self: start;
  }

  .page-about .about-rail__list {
    flex-direction: column;
    gap: 0.1rem;
  }

  .page-about .about-rail__list a {
    padding: 0.45rem 0 0.45rem 0.85rem;
    border: 0;
    border-left: 2px solid rgba(11, 31, 24, 0.14);
    border-radius: 0;
    background: transparent;
  }

  .page-about .about-rail__list a:hover,
  .page-about .about-rail__list a:focus-visible {
    border-left-color: var(--c-orange);
    color: var(--c-green-deep);
  }
}

@media (hover: hover) and (pointer: fine) {
  .page-about .about-role__more {
    max-height: 0;
    margin-top: 0;
    padding-top: 0;
    overflow: hidden;
    opacity: 0;
    border-top-color: transparent;
    transition: max-height 220ms var(--ease), opacity 220ms var(--ease), margin-top 220ms var(--ease), padding-top 220ms var(--ease);
  }

  .page-about .about-role:hover .about-role__more,
  .page-about .about-role:focus .about-role__more,
  .page-about .about-role:focus-within .about-role__more {
    max-height: 8rem;
    margin-top: 0.55rem;
    padding-top: 0.55rem;
    opacity: 1;
    border-top-color: rgba(11, 31, 24, 0.16);
  }
}

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