.page-about {
  --about-hair: rgba(216, 181, 106, 0.26);
  --about-hair-ink: rgba(18, 26, 32, 0.12);
  --about-rail: 11.5rem;
  --about-gold-ink: #8a6a2a;
  --about-text: #2c3941;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  background:
    radial-gradient(120% 80% at 85% 0%, rgba(18, 56, 79, 0.92), transparent 62%),
    var(--deep-900);
  color: var(--paper);
  padding-block: clamp(1.25rem, 3vw, 2rem) clamp(2.25rem, 5vw, 4rem);
  border-bottom: 1px solid var(--about-hair);
}

.page-about .about-hero .breadcrumb__link,
.page-about .about-hero .breadcrumb__current {
  color: var(--mist);
}

.page-about .about-hero .breadcrumb__link {
  transition: color var(--ease);
}

.page-about .about-hero .breadcrumb__link:hover,
.page-about .about-hero .breadcrumb__link:focus-visible {
  color: var(--sand);
}

.page-about .about-hero__frame {
  position: relative;
  margin-top: clamp(1rem, 2.5vw, 1.75rem);
  padding: clamp(1.25rem, 3.2vw, 2.75rem);
  border: 1px solid rgba(216, 181, 106, 0.4);
  border-radius: var(--radius);
  background: linear-gradient(160deg, rgba(11, 37, 55, 0.72), rgba(6, 24, 38, 0.34));
  display: grid;
  gap: clamp(1rem, 3vw, 2rem);
}

.page-about .about-hero__frame::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 6px;
  background: repeating-linear-gradient(90deg, rgba(216, 181, 106, 0.55) 0 1px, transparent 1px 16px);
  pointer-events: none;
}

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

.page-about .about-hero__kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.24em;
  color: var(--sand);
}

.page-about .about-hero h1 {
  margin: 0.6rem 0 1rem;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(2rem, 7vw, 3.6rem);
  line-height: 1.08;
  letter-spacing: 0.01em;
  color: var(--white);
  max-width: 20ch;
}

.page-about .about-hero__lede {
  margin: 0;
  max-width: 58ch;
  font-size: clamp(0.95rem, 1.6vw, 1.05rem);
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-hero__meta {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 0.6rem;
  margin: 1.5rem 0 0;
  padding: 0;
}

.page-about .about-hero__meta li {
  display: inline-flex;
  align-items: baseline;
  gap: 0.3rem;
  padding: 0.4rem 0.7rem;
  border: 1px solid rgba(216, 181, 106, 0.32);
  border-radius: 2px;
  background: rgba(6, 24, 38, 0.5);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: var(--sand-light);
}

.page-about .about-hero__meta .data-mono {
  font-size: 0.95rem;
  color: var(--sand);
}

/* ---------- 画布与左栏 ---------- */
.page-about .about-canvas {
  padding-block: clamp(2rem, 5vw, 3.75rem);
}

.page-about .about-canvas__grid {
  display: grid;
  gap: clamp(1.25rem, 4vw, 2.5rem);
}

.page-about .about-rail__label {
  margin: 0 0 0.75rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--about-hair);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.24em;
  color: var(--deep-700);
}

.page-about .about-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1rem;
}

.page-about .about-rail__link {
  display: inline-flex;
  align-items: baseline;
  gap: 0.45rem;
  padding-block: 0.15rem;
  font-size: 0.82rem;
  color: var(--deep-700);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--ease), border-color var(--ease);
}

.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible {
  color: var(--deep-900);
  border-bottom-color: var(--sand);
}

.page-about .about-rail__num {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--about-gold-ink);
}

/* ---------- 章节通用 ---------- */
.page-about .about-sec {
  position: relative;
  padding-block: clamp(1.75rem, 4vw, 2.75rem);
  border-top: 1px solid var(--about-hair-ink);
  scroll-margin-top: 5rem;
}

.page-about .about-sec:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .about-sec .section-head__kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.22em;
  color: var(--about-gold-ink);
}

.page-about .about-sec .section-head__title {
  margin: 0.35rem 0 1.1rem;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.45rem, 3.4vw, 2.1rem);
  line-height: 1.25;
  letter-spacing: 0.01em;
  color: var(--deep-900);
}

.page-about .about-sec:target .section-head__title::after {
  content: "";
  display: block;
  width: 3rem;
  height: 2px;
  margin-top: 0.6rem;
  background: var(--sand);
}

.page-about .about-sec p {
  margin: 0 0 0.9rem;
  font-size: 0.96rem;
  line-height: 1.85;
  color: var(--about-text);
}

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

/* ---------- 起点分栏 ---------- */
.page-about .about-split {
  display: grid;
  gap: clamp(1.25rem, 3vw, 2rem);
}

.page-about .about-points {
  list-style: none;
  margin: 1.1rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.55rem;
}

.page-about .about-points li {
  position: relative;
  padding-left: 1.15rem;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--about-text);
}

.page-about .about-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.66em;
  width: 0.5rem;
  height: 1px;
  background: var(--sand);
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 0;
}

.page-about .about-figure__box {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--about-hair);
  border-radius: var(--radius);
  background: var(--deep-800);
  aspect-ratio: 3 / 2;
}

.page-about .about-figure__box--tall {
  aspect-ratio: 4 / 3;
}

.page-about .about-figure__box--band {
  aspect-ratio: 16 / 9;
}

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

.page-about .about-figure figcaption {
  margin-top: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  color: #6a7780;
}

.page-about .about-figure--band {
  margin-bottom: 1.5rem;
}

/* ---------- 内容形成 ---------- */
.page-about .about-method-panel {
  padding: clamp(1.35rem, 3.5vw, 2.6rem);
  border-radius: var(--radius);
  color: var(--paper);
}

.page-about .about-method-panel__grid {
  display: grid;
  gap: clamp(1.25rem, 3vw, 2rem);
}

.page-about .flow-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .flow-item {
  display: grid;
  grid-template-columns: 2.2rem minmax(0, 1fr);
  gap: 0.8rem;
  padding-block: 1rem;
  border-top: 1px solid rgba(216, 181, 106, 0.22);
}

.page-about .flow-item:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .flow-item:last-child {
  border-bottom: 1px solid rgba(216, 181, 106, 0.22);
}

.page-about .flow-item__num {
  padding-top: 0.22rem;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  color: var(--sand);
}

.page-about .flow-item__title {
  margin: 0 0 0.3rem;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: 0.02em;
  color: var(--white);
}

.page-about .about-method-panel .flow-item__text {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .flow-item .flow-item__tag {
  display: inline-block;
  margin-top: 0.55rem;
}

.page-about .about-method-panel__aside {
  display: grid;
  gap: 0.9rem;
  align-content: start;
}

.page-about .about-source {
  margin: 0;
  padding-left: 0.85rem;
  border-left: 2px solid rgba(216, 181, 106, 0.55);
  font-size: 0.82rem;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 团队 ---------- */
.page-about .team-lead {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.4rem 1rem;
  margin-bottom: 1.25rem;
}

.page-about .team-lead__num {
  font-size: clamp(2.2rem, 6vw, 2.9rem);
  line-height: 1;
  color: var(--deep-900);
}

.page-about .team-lead p {
  flex: 1 1 16rem;
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.8;
}

.page-about .team-set {
  display: grid;
  gap: 0.6rem;
}

.page-about .team-role {
  border: 1px solid var(--about-hair-ink);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.66);
  transition: border-color var(--ease), background var(--ease);
}

.page-about .team-role:hover {
  border-color: rgba(216, 181, 106, 0.6);
}

.page-about .team-role[open] {
  border-color: rgba(216, 181, 106, 0.75);
  background: var(--white);
}

.page-about .team-role__summary {
  display: grid;
  grid-template-columns: 2.2rem minmax(0, 1fr) 1rem;
  align-items: center;
  gap: 0.7rem;
  padding: 0.85rem 1rem;
  cursor: pointer;
  list-style: none;
}

.page-about .team-role__summary::-webkit-details-marker {
  display: none;
}

.page-about .team-role__summary:focus-visible {
  outline: 2px solid var(--sand);
  outline-offset: -2px;
}

.page-about .team-role__num {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--about-gold-ink);
}

.page-about .team-role__name {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.08rem;
  letter-spacing: 0.04em;
  color: var(--deep-900);
}

.page-about .team-role__cue {
  position: relative;
  justify-self: end;
  width: 0.85rem;
  height: 0.85rem;
}

.page-about .team-role__cue::before,
.page-about .team-role__cue::after {
  content: "";
  position: absolute;
  background: var(--about-gold-ink);
  transition: transform var(--ease), opacity var(--ease);
}

.page-about .team-role__cue::before {
  left: 0;
  top: 50%;
  width: 100%;
  height: 1px;
}

.page-about .team-role__cue::after {
  top: 0;
  left: 50%;
  width: 1px;
  height: 100%;
}

.page-about .team-role[open] .team-role__cue::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-about .team-role__text {
  margin: 0;
  padding: 0 1rem 1rem;
  font-size: 0.88rem;
  line-height: 1.8;
  color: var(--about-text);
}

/* ---------- 赛季阶段轴 ---------- */
.page-about .season-track {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0 0 0 2.9rem;
}

.page-about .season-track::before {
  content: "";
  position: absolute;
  left: 1.02rem;
  top: 1rem;
  bottom: 1rem;
  width: 1px;
  background: linear-gradient(180deg, var(--sand), rgba(216, 181, 106, 0.16));
}

.page-about .season-stage {
  position: relative;
  padding-block: 0.7rem 1rem;
  outline-offset: 4px;
}

.page-about .season-stage:focus-visible {
  outline: 2px solid var(--sand);
}

.page-about .season-stage__num {
  position: absolute;
  left: -2.9rem;
  top: 0.75rem;
  width: 2.05rem;
  height: 1.5rem;
  line-height: 1.5rem;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  color: var(--deep-900);
  background: var(--paper);
  border: 1px solid rgba(216, 181, 106, 0.55);
  transition: background var(--ease), color var(--ease), border-color var(--ease);
}

.page-about .season-stage:hover .season-stage__num,
.page-about .season-stage:focus .season-stage__num,
.page-about .season-stage:focus-within .season-stage__num {
  background: var(--sand);
  border-color: var(--sand);
  color: var(--deep-900);
}

.page-about .season-stage__title {
  margin: 0 0 0.25rem;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.08rem;
  letter-spacing: 0.03em;
  color: var(--deep-900);
}

.page-about .season-stage__text {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--about-text);
}

.page-about .season-stage__more {
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  margin: 0;
  font-size: 0.84rem;
  line-height: 1.75;
  color: #5b6a74;
  transition: max-height var(--ease), opacity var(--ease), margin var(--ease);
}

.page-about .season-stage:hover .season-stage__more,
.page-about .season-stage:focus .season-stage__more,
.page-about .season-stage:focus-within .season-stage__more {
  max-height: 8rem;
  opacity: 1;
  margin-top: 0.4rem;
}

.page-about .season-stage .season-stage__tag {
  display: inline-block;
  margin-top: 0.5rem;
}

/* ---------- 覆盖与场景 ---------- */
.page-about .reach-grid {
  display: grid;
  gap: clamp(1.25rem, 3vw, 2.25rem);
}

.page-about .reach-stat {
  border-left: 3px solid var(--sand);
  padding: 0.2rem 0 0.2rem 1rem;
}

.page-about .reach-stat__num {
  display: block;
  font-size: clamp(2.6rem, 8vw, 3.6rem);
  line-height: 1;
  color: var(--deep-900);
}

.page-about .reach-stat__unit {
  display: block;
  margin-top: 0.4rem;
  font-family: var(--font-head);
  font-size: 0.95rem;
  letter-spacing: 0.14em;
  color: var(--about-gold-ink);
}

.page-about .reach-stat p {
  margin-top: 0.8rem;
  font-size: 0.88rem;
}

.page-about .reach-scenes {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .reach-scenes li {
  padding-block: 0.9rem;
  border-top: 1px solid var(--about-hair-ink);
}

.page-about .reach-scenes li:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .reach-scenes h3 {
  margin: 0 0 0.28rem;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.03em;
  color: var(--deep-900);
}

.page-about .reach-scenes p {
  margin: 0;
  font-size: 0.88rem;
}

.page-about .reach-note {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.75rem;
  margin-top: 1.6rem;
  padding-top: 0.9rem;
  border-top: 1px solid var(--about-hair);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.04em;
  color: #5b6a74;
}

.page-about .reach-note b {
  margin-right: 0.2rem;
  font-size: 0.98rem;
  color: var(--deep-900);
}

/* ---------- 结尾 ---------- */
.page-about .about-cta {
  padding-block: clamp(1.5rem, 4vw, 2.5rem) clamp(2rem, 5vw, 3.5rem);
}

.page-about .about-cta__panel {
  position: relative;
  overflow: hidden;
  padding: clamp(1.5rem, 4vw, 3rem);
  border-radius: var(--radius);
}

.page-about .about-cta__panel::before {
  content: "";
  position: absolute;
  right: -12%;
  top: -45%;
  width: 58%;
  aspect-ratio: 1;
  background: radial-gradient(circle, rgba(120, 183, 162, 0.18), transparent 68%);
  pointer-events: none;
}

.page-about .about-cta__kicker {
  margin: 0 0 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.24em;
  color: var(--sand);
}

.page-about .about-cta__panel h2 {
  margin: 0 0 0.75rem;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.5rem, 4vw, 2.1rem);
  line-height: 1.25;
  color: var(--white);
}

.page-about .about-cta__panel p {
  position: relative;
  margin: 0;
  max-width: 56ch;
  font-size: 0.92rem;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-cta__actions {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.4rem;
}

.page-about .about-cta__foot {
  margin-top: 1.1rem;
  font-size: 0.86rem;
  color: var(--mist);
}

.page-about .about-cta__foot .link-arrow {
  color: var(--sand);
}

.page-about .about-cta__foot .link-arrow:hover,
.page-about .about-cta__foot .link-arrow:focus-visible {
  color: var(--sand-light);
}

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-about .about-hero__frame {
    grid-template-columns: 3.25rem minmax(0, 1fr);
    align-items: stretch;
  }

  .page-about .about-hero__side {
    display: flex;
    align-items: center;
    justify-content: center;
    border-right: 1px solid rgba(216, 181, 106, 0.25);
  }

  .page-about .about-hero__side-text {
    writing-mode: vertical-rl;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.28em;
    color: var(--sand);
  }

  .page-about .team-role__summary {
    grid-template-columns: 2.8rem minmax(0, 1fr) 1rem;
    padding: 0.95rem 1.15rem;
  }

  .page-about .team-role__text {
    padding: 0 1.15rem 1.1rem 4.75rem;
  }
}

@media (min-width: 820px) {
  .page-about .about-split {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
  }

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

@media (min-width: 960px) {
  .page-about .about-canvas__grid {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: clamp(2rem, 4vw, 3.5rem);
  }

  .page-about .about-rail {
    position: sticky;
    top: 1.5rem;
    align-self: start;
    padding-left: 1rem;
    border-left: 1px solid var(--about-hair);
  }

  .page-about .about-rail__list {
    flex-direction: column;
    gap: 0.5rem;
  }

  .page-about .about-method-panel__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: clamp(1.5rem, 3vw, 2.5rem);
  }

  .page-about .flow-item {
    grid-template-columns: 2.6rem minmax(0, 1fr);
    gap: 1rem;
  }
}

@media (min-width: 1100px) {
  .page-about .season-track {
    padding-left: 3.4rem;
  }

  .page-about .season-stage__num {
    left: -3.4rem;
    width: 2.4rem;
  }
}
<<<END>>>