.page-about {
  --about-accent: var(--cyan);
  --about-gap: clamp(18px, 2.6vw, 32px);
  background: var(--navy);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(118% 132% at 88% -14%, rgba(31, 224, 208, .18), transparent 56%),
    linear-gradient(158deg, var(--navy-2) 0%, var(--navy) 58%, var(--navy-deep) 100%);
  padding-top: clamp(20px, 3.4vw, 40px);
  padding-bottom: clamp(34px, 5.6vw, 72px);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  top: -22%;
  right: -26%;
  width: min(780px, 70%);
  height: 148%;
  z-index: -1;
  pointer-events: none;
  background: linear-gradient(205deg, rgba(31, 224, 208, .17), rgba(107, 77, 255, .15) 60%, transparent 88%);
  clip-path: polygon(48% 0, 100% 0, 100% 100%, 0 100%);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
  align-items: center;
}

.page-about .about-hero h1 {
  margin: 10px 0 16px;
  font-size: clamp(30px, 5.4vw, 56px);
  line-height: 1.08;
  letter-spacing: -.02em;
  color: var(--ice);
}

.page-about .about-hero .lede {
  max-width: 60ch;
  color: rgba(242, 246, 255, .84);
}

.page-about .hero-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 26px 0 0;
  padding: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .hero-stats > div {
  background: rgba(6, 11, 30, .78);
  padding: 13px 15px 15px;
}

.page-about .hero-stats dt {
  margin: 0 0 7px;
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--slate);
}

.page-about .hero-stats dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(23px, 3.2vw, 33px);
  font-weight: 700;
  line-height: 1;
  color: var(--ice);
  font-variant-numeric: tabular-nums;
}

.page-about .hero-stats > div:nth-child(2) dd { color: var(--cyan); }
.page-about .hero-stats > div:nth-child(3) dd { color: var(--cyan-mist); }
.page-about .hero-stats > div:nth-child(4) dd { color: var(--orange); }

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

.page-about .about-hero__figure .figure__frame {
  aspect-ratio: 5 / 4;
  overflow: hidden;
}

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

@media (min-width: 980px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }
  .page-about .about-hero__figure .figure__frame {
    aspect-ratio: 16 / 13;
  }
  .page-about .about-hero__figure .figure__frame img {
    height: 100%;
  }
}

/* ---------- 长卷轨道 ---------- */
.page-about .about-track {
  display: grid;
  gap: clamp(24px, 4vw, 56px);
  padding-top: clamp(38px, 5.4vw, 72px);
  padding-bottom: clamp(30px, 4.4vw, 56px);
}

.page-about .about-track--cont {
  padding-top: clamp(34px, 4.6vw, 64px);
}

.page-about .track-rail__inner {
  border-top: 2px solid var(--cyan);
  padding-top: 14px;
}

.page-about .track-rail__title {
  margin: 0 0 13px;
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--slate);
}

.page-about .rail__list {
  position: relative;
  display: grid;
  gap: 2px;
  margin: 0;
  padding: 0 0 0 20px;
  list-style: none;
}

.page-about .rail__list::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan) 0%, rgba(31, 224, 208, .18) 72%, transparent 100%);
}

.page-about .rail__link {
  position: relative;
  display: block;
  padding: 7px 0;
  font-size: 13px;
  line-height: 1.4;
  color: var(--slate);
  text-decoration: none;
  transition: color var(--dur) var(--ease), padding-left var(--dur) var(--ease);
}

.page-about .rail__link::before {
  content: "";
  position: absolute;
  left: -20px;
  top: 50%;
  width: 9px;
  height: 9px;
  margin-top: -4.5px;
  border: 1px solid var(--line-strong);
  background: var(--navy);
  transform: rotate(45deg);
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .rail__link:hover,
.page-about .rail__link:focus-visible {
  color: var(--ice);
  padding-left: 5px;
}

.page-about .rail__link:hover::before,
.page-about .rail__link:focus-visible::before {
  background: var(--cyan);
  border-color: var(--cyan);
  transform: rotate(45deg) scale(1.16);
}

.page-about .rail__num {
  display: inline-block;
  margin-right: 7px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

@media (min-width: 1020px) {
  .page-about .about-track {
    grid-template-columns: 188px minmax(0, 1fr);
  }
  .page-about .track-rail__inner {
    position: sticky;
    top: 118px;
  }
}

/* ---------- 章节 ---------- */
.page-about .season {
  position: relative;
  border-top: 1px solid var(--line);
  padding: clamp(24px, 3.2vw, 38px) 0 clamp(26px, 3.6vw, 44px);
}

.page-about .season:first-child {
  border-top: none;
  padding-top: 0;
}

.page-about .season__no {
  display: block;
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: clamp(32px, 4.4vw, 50px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--cyan);
  opacity: .82;
  font-variant-numeric: tabular-nums;
}

.page-about .season__title {
  margin: 0 0 15px;
  font-size: clamp(21px, 2.6vw, 30px);
  line-height: 1.24;
  letter-spacing: -.01em;
  color: var(--ice);
}

.page-about .season p {
  max-width: 68ch;
  margin: 0 0 13px;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(242, 246, 255, .82);
}

.page-about .season__note {
  margin-top: 16px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--cyan-mist);
  background: rgba(19, 28, 70, .5);
  font-size: 13.5px;
  color: rgba(242, 246, 255, .78);
}

.page-about .season__verdict {
  margin: 20px 0 0;
  padding-left: 16px;
  border-left: 3px solid var(--cyan);
  font-size: clamp(15px, 1.7vw, 18px);
  line-height: 1.7;
  color: var(--ice);
}

.page-about .hl {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--orange);
  font-variant-numeric: tabular-nums;
}

.page-about .link-more {
  display: inline-block;
  margin-top: 4px;
  font-size: 14px;
  letter-spacing: .02em;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(31, 224, 208, .38);
  padding-bottom: 2px;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .link-more:hover,
.page-about .link-more:focus-visible {
  color: var(--cyan-mist);
  border-color: var(--cyan-mist);
}

/* ---------- 阶段刻度 ---------- */
.page-about .phases {
  position: relative;
  display: grid;
  gap: 18px;
  margin: 24px 0 0;
  padding: 0 0 0 20px;
  list-style: none;
}

.page-about .phases::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan), rgba(31, 224, 208, .1));
}

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

.page-about .phase::before {
  content: "";
  position: absolute;
  left: -20px;
  top: 6px;
  width: 9px;
  height: 9px;
  background: var(--navy);
  border: 1px solid var(--cyan);
  transform: rotate(45deg);
}

.page-about .phase__title {
  margin: 0 0 5px;
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--cyan);
}

.page-about .phase__text {
  margin: 0 !important;
  font-size: 14px !important;
  line-height: 1.7 !important;
  color: rgba(242, 246, 255, .74) !important;
}

/* ---------- 三组分工 ---------- */
.page-about .roles {
  display: grid;
  gap: 12px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .role {
  padding: 16px 16px 18px;
  border: 1px solid var(--line);
  border-top: 2px solid var(--cyan);
  background: rgba(19, 28, 70, .58);
  box-shadow: 5px 5px 0 rgba(3, 7, 20, .66);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .role:nth-child(2) { border-top-color: var(--cyan-mist); }
.page-about .role:nth-child(3) { border-top-color: var(--violet); }

.page-about .role:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hard-hover);
  border-color: var(--line-strong);
}

.page-about .role h3 {
  margin: 0 0 8px;
  font-size: 15px;
  letter-spacing: .02em;
  color: var(--ice);
}

.page-about .role p {
  margin: 0 !important;
  max-width: none !important;
  font-size: 13.5px !important;
  line-height: 1.72 !important;
  color: rgba(242, 246, 255, .74) !important;
}

@media (min-width: 700px) {
  .page-about .roles {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 章节配图 ---------- */
.page-about .season__banner {
  margin: 24px 0 0;
}

.page-about .season__banner .figure__frame {
  aspect-ratio: 16 / 9;
  overflow: hidden;
}

.page-about .season__banner .figure__frame img,
.page-about .season__figure .figure__frame img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .season__grid {
  display: grid;
  gap: 22px;
}

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

.page-about .season__figure .figure__frame {
  aspect-ratio: 3 / 2;
  overflow: hidden;
}

@media (min-width: 860px) {
  .page-about .season__grid {
    grid-template-columns: minmax(0, 1fr) 320px;
    align-items: start;
  }
}

/* ---------- 双频道对照带 ---------- */
.page-about .about-lanes {
  position: relative;
  overflow: hidden;
  margin-top: clamp(6px, 1.6vw, 18px);
  padding-top: clamp(34px, 4.8vw, 64px);
  padding-bottom: clamp(34px, 4.8vw, 64px);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(90deg, rgba(31, 224, 208, .11) 0%, rgba(31, 224, 208, .11) 50%, rgba(107, 77, 255, .14) 50%, rgba(107, 77, 255, .14) 100%),
    var(--navy-deep);
}

.page-about .about-lanes .eyebrow {
  color: var(--cyan-mist);
}

.page-about .lanes-title {
  margin: 8px 0 12px;
  font-size: clamp(24px, 3.4vw, 38px);
  line-height: 1.16;
  letter-spacing: -.015em;
  color: var(--ice);
}

.page-about .lanes-lede {
  max-width: 64ch;
  color: rgba(242, 246, 255, .8);
}

.page-about .lanes {
  position: relative;
  display: grid;
  gap: 18px;
  margin-top: 28px;
}

.page-about .lane {
  padding: 22px 20px 24px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--cyan);
  background: rgba(10, 18, 48, .62);
  box-shadow: 6px 6px 0 rgba(3, 7, 20, .7);
}

.page-about .lane--official {
  border-left-color: var(--violet);
}

.page-about .lane__tag {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--cyan);
}

.page-about .lane--official .lane__tag {
  color: var(--cyan-mist);
}

.page-about .lane__title {
  margin: 0 0 12px;
  font-size: clamp(18px, 2.2vw, 24px);
  line-height: 1.25;
  color: var(--ice);
}

.page-about .lane p {
  margin: 0 0 12px;
  max-width: 62ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(242, 246, 255, .82);
}

.page-about .lane__list {
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}

.page-about .lane__list li {
  position: relative;
  padding-left: 18px;
  font-size: 13.5px;
  line-height: 1.6;
  color: rgba(242, 246, 255, .72);
}

.page-about .lane__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 7px;
  width: 7px;
  height: 7px;
  background: var(--cyan);
  transform: rotate(45deg);
}

.page-about .lane--official .lane__list li::before {
  background: var(--violet);
}

@media (min-width: 900px) {
  .page-about .lanes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 28px;
  }
  .page-about .lanes::before {
    content: "";
    position: absolute;
    left: 50%;
    top: -10px;
    bottom: -10px;
    width: 1px;
    margin-left: -14px;
    background: linear-gradient(180deg, transparent, var(--cyan-mist) 30%, var(--violet) 72%, transparent);
    transform: rotate(5deg);
    transform-origin: center;
    pointer-events: none;
  }
  .page-about .lane {
    padding: 26px 26px 28px;
  }
}

/* ---------- 尾部行动带 ---------- */
.page-about .about-cta {
  position: relative;
  overflow: hidden;
  border-top: 1px solid var(--line);
  background: linear-gradient(118deg, var(--navy-2) 0%, var(--navy-deep) 72%);
  padding-top: clamp(36px, 5.2vw, 70px);
  padding-bottom: clamp(36px, 5.2vw, 70px);
}

.page-about .about-cta::after {
  content: "";
  position: absolute;
  right: -14%;
  bottom: -68%;
  width: min(620px, 74%);
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 106, 43, .22), transparent 68%);
  pointer-events: none;
}

.page-about .about-cta__inner {
  position: relative;
  display: grid;
  gap: 20px;
}

.page-about .about-cta h2 {
  margin: 0 0 10px;
  font-size: clamp(24px, 3.2vw, 36px);
  line-height: 1.16;
  color: var(--ice);
}

.page-about .about-cta__text {
  margin: 0;
  max-width: 58ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(242, 246, 255, .8);
}

.page-about .about-cta__actions {
  align-items: center;
}

@media (min-width: 880px) {
  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 36px;
  }
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
  .page-about .role:hover {
    transform: none;
  }
}