.page-about {
  --about-rail: 180px;
  --about-pad: clamp(1.25rem, 4vw, 2rem);
  background: var(--ink);
  color: var(--mist);
  font-family: var(--font-body);
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumbs {
  padding-top: clamp(1.25rem, 3vw, 2.25rem);
}

.page-about .about-crumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .06em;
  color: var(--slate);
}

.page-about .about-crumbs li + li::before {
  content: "/";
  margin-right: .5rem;
  color: rgba(166, 168, 190, .5);
}

.page-about .about-crumbs a {
  color: var(--slate);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-about .about-crumbs a:hover,
.page-about .about-crumbs a:focus-visible {
  color: var(--amber);
  border-bottom-color: var(--amber);
}

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

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding-block: clamp(2.5rem, 7vw, 5.5rem) clamp(1.75rem, 4vw, 3rem);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -32%;
  right: -12%;
  width: min(62vw, 640px);
  aspect-ratio: 1;
  background: radial-gradient(circle, rgba(124, 226, 60, .17), rgba(47, 214, 196, .06) 46%, transparent 72%);
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
}

.page-about .about-kicker {
  margin: 0 0 1.25rem;
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-about .about-kicker::before {
  content: "";
  display: inline-block;
  width: 8px;
  height: 8px;
  margin-right: .6rem;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 12px rgba(124, 226, 60, .8);
  vertical-align: middle;
}

.page-about .about-hero__title {
  margin: 0 0 1.5rem;
  max-width: 15em;
  font-family: var(--font-display);
  font-size: clamp(2.05rem, 5.4vw, 4rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--mist);
}

.page-about .about-hero__lede {
  margin: 0;
  max-width: 62ch;
  font-size: 1.0625rem;
  line-height: 1.8;
  color: rgba(241, 244, 238, .82);
}

/* ---------- 章节骨架 ---------- */
.page-about .about-chapter {
  display: grid;
  gap: 1.5rem;
  padding-block: clamp(2.5rem, 6vw, 4.5rem);
  border-top: 1px solid rgba(166, 168, 190, .12);
}

.page-about .about-chapter__rail {
  display: flex;
  flex-direction: column;
  gap: .875rem;
}

.page-about .about-chapter__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.9rem, 4vw, 2.9rem);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--green);
}

.page-about .about-chapter__title {
  margin: 0 0 1.25rem;
  max-width: 22ch;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3.1vw, 2.35rem);
  line-height: 1.22;
  letter-spacing: -0.015em;
  color: var(--mist);
}

.page-about .about-chapter__text p,
.page-about .about-chapter__body > p {
  margin: 0 0 1.1rem;
  max-width: 62ch;
  font-size: 1.0625rem;
  line-height: 1.78;
  color: rgba(241, 244, 238, .8);
}

.page-about .about-chapter__text p:last-child,
.page-about .about-chapter__body > p:last-child {
  margin-bottom: 0;
}

/* ---------- 插图 ---------- */
.page-about .about-figure {
  margin: 1.875rem 0 0;
  position: relative;
}

.page-about .about-figure img,
.page-about .about-banner img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-figure img {
  clip-path: polygon(0 4%, 100% 0, 100% 96%, 0 100%);
  transition: clip-path .5s var(--ease);
}

.page-about .about-figure:hover img,
.page-about .about-figure:focus-within img {
  clip-path: polygon(0 0, 100% 3%, 100% 100%, 0 97%);
}

.page-about .about-banner {
  margin: 1.875rem 0;
  border-radius: 4px;
  overflow: hidden;
  border: 1px solid rgba(166, 168, 190, .14);
}

.page-about .about-figure figcaption,
.page-about .about-banner figcaption {
  margin-top: .875rem;
  font-family: var(--font-mono);
  font-size: .78rem;
  line-height: 1.65;
  letter-spacing: .02em;
  color: var(--slate);
}

/* ---------- 里程碑横带 ---------- */
.page-about .milestone-band {
  position: relative;
  margin-block: clamp(1.5rem, 4vw, 2.75rem);
  padding-block: clamp(1.75rem, 4vw, 2.75rem);
  background: linear-gradient(180deg, transparent, rgba(42, 27, 87, .62) 14%, rgba(42, 27, 87, .62) 86%, transparent);
}

.page-about .milestone-band::before,
.page-about .milestone-band::after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  width: clamp(20px, 6vw, 80px);
  pointer-events: none;
  z-index: 2;
}

.page-about .milestone-band::before {
  left: 0;
  background: linear-gradient(90deg, var(--ink), transparent);
}

.page-about .milestone-band::after {
  right: 0;
  background: linear-gradient(270deg, var(--ink), transparent);
}

.page-about .milestone-track {
  display: flex;
  gap: 1rem;
  margin: 0;
  padding-inline: max(1.25rem, calc((100vw - var(--maxw)) / 2));
  padding-bottom: .875rem;
  list-style: none;
  overflow-x: auto;
  overflow-y: hidden;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: rgba(124, 226, 60, .5) transparent;
}

.page-about .milestone-track::-webkit-scrollbar {
  height: 6px;
}

.page-about .milestone-track::-webkit-scrollbar-thumb {
  background: rgba(124, 226, 60, .45);
  border-radius: 999px;
}

.page-about .milestone {
  flex: 0 0 auto;
  width: clamp(228px, 68vw, 300px);
  scroll-snap-align: start;
  padding: 1.5rem 1.375rem 1.75rem;
  border: 1px solid rgba(166, 168, 190, .16);
  border-radius: 22px;
  background: linear-gradient(165deg, rgba(42, 27, 87, .92), rgba(23, 14, 51, .94));
  transition: transform .28s var(--ease), border-color .28s var(--ease), box-shadow .28s var(--ease);
}

.page-about .milestone:hover,
.page-about .milestone:focus-within {
  transform: translateY(-4px);
  border-color: rgba(124, 226, 60, .45);
  box-shadow: var(--shadow-pod);
}

.page-about .milestone__seed {
  display: block;
  width: 10px;
  height: 10px;
  margin-bottom: 1.125rem;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 14px rgba(124, 226, 60, .75);
}

.page-about .milestone__year {
  margin: 0 0 .5rem;
  font-family: var(--font-mono);
  font-size: .82rem;
  letter-spacing: .14em;
  color: var(--amber);
}

.page-about .milestone__title {
  margin: 0 0 .625rem;
  font-family: var(--font-display);
  font-size: 1.15rem;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--mist);
}

.page-about .milestone__text {
  margin: 0;
  font-size: .95rem;
  line-height: 1.72;
  color: rgba(241, 244, 238, .74);
}

/* ---------- 团队分工 ---------- */
.page-about .about-roles {
  margin: 2rem 0 0;
}

.page-about .about-role {
  display: grid;
  gap: .5rem;
  padding-block: 1.375rem;
  border-top: 1px solid rgba(166, 168, 190, .12);
}

.page-about .about-role:last-child {
  border-bottom: 1px solid rgba(166, 168, 190, .12);
}

.page-about .about-role dt {
  position: relative;
  padding-left: 1.125rem;
  font-family: var(--font-display);
  font-size: 1.0625rem;
  line-height: 1.45;
  color: var(--mist);
}

.page-about .about-role dt::before {
  content: "";
  position: absolute;
  left: 0;
  top: .58em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cyan);
}

.page-about .about-role dd {
  margin: 0;
  max-width: 58ch;
  font-size: 1rem;
  line-height: 1.76;
  color: rgba(241, 244, 238, .78);
}

/* ---------- 内容流程 ---------- */
.page-about .about-flow {
  margin: 2rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-flow__step {
  position: relative;
  padding: 0 0 2rem 2.75rem;
}

.page-about .about-flow__step::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 1.75rem;
  bottom: 0;
  width: 1px;
  background: linear-gradient(180deg, rgba(47, 214, 196, .7), rgba(47, 214, 196, 0));
}

.page-about .about-flow__step:last-child {
  padding-bottom: 0;
}

.page-about .about-flow__step:last-child::before {
  display: none;
}

.page-about .about-flow__idx {
  position: absolute;
  left: 0;
  top: 0;
  display: grid;
  place-items: center;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--cyan);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: .64rem;
  letter-spacing: .02em;
  line-height: 1;
}

.page-about .about-flow__title {
  margin: .1rem 0 .5rem;
  font-family: var(--font-display);
  font-size: 1.1rem;
  line-height: 1.35;
  letter-spacing: -0.01em;
  color: var(--mist);
}

.page-about .about-flow__text {
  margin: 0;
  max-width: 58ch;
  font-size: 1rem;
  line-height: 1.76;
  color: rgba(241, 244, 238, .78);
}

.page-about .about-inline-link {
  margin: 1.75rem 0 0;
  font-size: 1rem;
  line-height: 1.7;
  color: rgba(241, 244, 238, .8);
}

.page-about .about-inline-link a {
  color: var(--amber);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 228, 94, .45);
  transition: border-color .2s var(--ease);
}

.page-about .about-inline-link a:hover,
.page-about .about-inline-link a:focus-visible {
  border-bottom-color: var(--amber);
}

/* ---------- 合作生态 ---------- */
.page-about .about-partners {
  display: grid;
  gap: 1.75rem;
  margin-top: .5rem;
}

.page-about .about-partners__text p {
  margin: 0 0 1.1rem;
  max-width: 58ch;
  font-size: 1.0625rem;
  line-height: 1.78;
  color: rgba(241, 244, 238, .8);
}

.page-about .about-partners__action {
  margin: 1.75rem 0 0;
}

.page-about .about-figure--compact {
  margin: 0;
}

.page-about .about-figure--compact img {
  clip-path: polygon(0 0, 100% 5%, 100% 100%, 0 95%);
}

/* ---------- 荣誉 ---------- */
.page-about .about-award {
  display: grid;
  gap: 1rem;
  margin-top: 1.75rem;
  padding: clamp(1.5rem, 4vw, 2.25rem);
  border: 1px solid rgba(255, 228, 94, .22);
  border-radius: 24px;
  background: linear-gradient(140deg, rgba(255, 228, 94, .1), rgba(42, 27, 87, .82) 55%, rgba(23, 14, 51, .94));
}

.page-about .about-award__year {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 6vw, 3.6rem);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--amber);
}

.page-about .about-award__name {
  margin: 0 0 .75rem;
  font-family: var(--font-display);
  font-size: 1.15rem;
  line-height: 1.4;
  color: var(--mist);
}

.page-about .about-award__text {
  margin: 0;
  max-width: 52ch;
  font-size: 1rem;
  line-height: 1.78;
  color: rgba(241, 244, 238, .8);
}

.page-about .about-facts {
  margin: 2rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-facts li {
  position: relative;
  padding: .9rem 0 .9rem 1.5rem;
  border-bottom: 1px solid rgba(166, 168, 190, .12);
  font-size: .98rem;
  line-height: 1.7;
  color: rgba(241, 244, 238, .76);
}

.page-about .about-facts li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 1.5rem;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--green);
}

/* ---------- 联系舱 ---------- */
.page-about .about-contact-cta {
  padding-block: clamp(2.5rem, 6vw, 5rem);
}

.page-about .about-contact-cta__pod {
  padding: clamp(1.75rem, 5vw, 3.25rem);
  border: 1px solid rgba(124, 226, 60, .22);
  border-radius: var(--radius-pod);
  background: linear-gradient(150deg, rgba(124, 226, 60, .16), rgba(42, 27, 87, .9) 46%, rgba(23, 14, 51, .96));
  box-shadow: var(--shadow-pod);
}

.page-about .about-contact-cta__title {
  margin: 0 0 1.25rem;
  max-width: 20ch;
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3.4vw, 2.5rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--mist);
}

.page-about .about-contact-cta__text {
  margin: 0 0 1rem;
  max-width: 62ch;
  font-size: 1.0625rem;
  line-height: 1.78;
  color: rgba(241, 244, 238, .82);
}

.page-about .about-contact-cta__action {
  display: flex;
  flex-wrap: wrap;
  gap: .875rem;
  margin: 1.75rem 0 0;
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-about .about-role {
    grid-template-columns: minmax(0, 11rem) minmax(0, 1fr);
    gap: 1.75rem;
    align-items: start;
  }

  .page-about .about-award {
    grid-template-columns: minmax(0, 8rem) minmax(0, 1fr);
    align-items: start;
    gap: 2rem;
  }
}

@media (min-width: 900px) {
  .page-about .about-chapter {
    grid-template-columns: minmax(0, var(--about-rail)) minmax(0, 1fr);
    gap: clamp(2rem, 5vw, 4.5rem);
  }

  .page-about .about-chapter__rail {
    position: sticky;
    top: 6.5rem;
    align-self: start;
  }

  .page-about .about-partners {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    gap: 2.5rem;
    align-items: start;
  }
}

@media (min-width: 1100px) {
  .page-about .about-hero__inner {
    padding-right: 4rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .milestone,
  .page-about .about-figure img {
    transition: none;
  }

  .page-about .milestone:hover,
  .page-about .milestone:focus-within {
    transform: none;
  }
}