.page-about {
  --about-head-gap: 10px;
  --about-section-pad: 44px;
  background: var(--ink-base);
  color: var(--paper-000);
  overflow-x: hidden;
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  padding-top: 18px;
  padding-bottom: 4px;
}
.page-about .breadcrumb-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  font-family: var(--font-cond);
  font-size: 13px;
  letter-spacing: .05em;
  color: var(--graphite-400);
}
.page-about .breadcrumb-list li {
  display: inline-flex;
  align-items: center;
}
.page-about .breadcrumb-list li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--graphite-700);
}
.page-about .breadcrumb-list a {
  color: var(--graphite-400);
  text-decoration: none;
  transition: color 160ms var(--ease);
}
.page-about .breadcrumb-list a:hover,
.page-about .breadcrumb-list a:focus-visible {
  color: var(--lava-300);
}
.page-about .breadcrumb-list [aria-current="page"] {
  color: var(--paper-000);
}

/* ---------- 通用文字色 ---------- */
.page-about .section-title {
  color: var(--paper-000);
}
.page-about .section-lede {
  color: rgba(252, 250, 246, .72);
}
.page-about .section-eyebrow {
  color: var(--lava-300);
}
.page-about .about-head {
  display: grid;
  gap: var(--about-head-gap);
  max-width: 64ch;
  margin-bottom: 26px;
}
.page-about .about-head .section-lede {
  margin: 0;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  padding: 22px 0 48px;
  background: var(--ink-base);
}
.page-about .about-hero-slice {
  position: absolute;
  left: 34%;
  right: -14%;
  bottom: -22%;
  height: 78%;
  z-index: -1;
  background: linear-gradient(150deg, var(--lava-600), var(--lava-900));
  clip-path: polygon(0 46%, 100% 0, 100% 100%, 0 100%);
  opacity: .32;
  pointer-events: none;
}
.page-about .about-hero-inner {
  display: grid;
  gap: 30px;
}
.page-about .about-hero-copy {
  display: grid;
  gap: 14px;
  max-width: 62ch;
}
.page-about .about-hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 30px;
  line-height: 1.25;
  letter-spacing: -.01em;
  color: var(--paper-000);
}
.page-about .about-hero .section-lede {
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
}
.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 6px;
}
.page-about .about-hero-stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-dark);
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  overflow: hidden;
}
.page-about .about-hero-stats li {
  background: var(--ink-base);
  padding: 14px 16px;
  display: grid;
  gap: 6px;
  align-content: start;
}
.page-about .about-stat-value {
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--lava-300);
}
.page-about .about-stat-label {
  font-size: 13px;
  line-height: 1.5;
  color: var(--graphite-400);
}

/* ---------- 折叠基础（页面内统一外观） ---------- */
.page-about .acc-trigger {
  width: 100%;
  background: none;
  border: 0;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
}
.page-about .acc-icon {
  flex: 0 0 auto;
  width: 11px;
  height: 11px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(45deg);
  transition: transform 220ms var(--ease);
  opacity: .68;
}
.page-about .acc-item[data-open] .acc-icon {
  transform: rotate(-135deg);
  opacity: 1;
}
.page-about .acc-content p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
}
.page-about .acc-content p + p {
  margin-top: 10px;
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  position: relative;
  background: var(--ink-base);
  padding: 8px 0 0;
}
.page-about .about-timeline-list {
  border-top: 1px solid var(--line-dark);
}
.page-about .about-tl-item {
  border-bottom: 1px solid var(--line-dark);
}
.page-about .about-tl-trigger {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr) 16px;
  gap: 14px;
  align-items: center;
  padding: 18px 0;
  font-weight: 600;
  color: var(--paper-000);
  transition: color 180ms var(--ease);
}
.page-about .about-tl-trigger:hover,
.page-about .about-tl-trigger:focus-visible {
  color: var(--lava-300);
}
.page-about .about-tl-trigger .acc-icon {
  justify-self: end;
}
.page-about .about-tl-year {
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--lava-300);
}
.page-about .about-tl-heading {
  font-size: 16px;
  line-height: 1.5;
}
.page-about .about-tl-panel .acc-content {
  padding: 0 0 20px;
  color: rgba(252, 250, 246, .72);
}
.page-about .about-tl-item[data-open] {
  border-bottom-color: var(--lava-900);
}
.page-about .about-timeline-media {
  position: relative;
  margin: 34px 0 0;
  padding: 0;
}
.page-about .about-timeline-media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  filter: saturate(.9) contrast(1.02);
}
.page-about .about-timeline-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(20, 22, 26, .55) 0%, rgba(20, 22, 26, .05) 45%, rgba(20, 22, 26, .62) 100%);
  pointer-events: none;
}
.page-about .about-timeline-media .media-caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 14px;
  z-index: 1;
  font-size: 12px;
  letter-spacing: .04em;
  color: rgba(252, 250, 246, .78);
}

/* ---------- 团队分工 ---------- */
.page-about .about-team {
  background: var(--paper-panel);
  color: var(--ink-base);
  padding: var(--about-section-pad) 0;
}
.page-about .about-team .section-title {
  color: var(--ink-base);
}
.page-about .about-team .section-eyebrow {
  color: var(--lava-600);
}
.page-about .about-team-grid {
  display: grid;
  gap: 26px;
}
.page-about .about-team-media {
  margin: 0;
  border-radius: var(--radius);
}
.page-about .about-team-media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  border-radius: var(--radius);
}
.page-about .about-team-media .media-caption {
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--graphite-400);
}
.page-about .about-team-copy {
  display: grid;
  gap: 12px;
}
.page-about .about-team-copy .section-title {
  margin: 0;
}
.page-about .about-team-lede {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--graphite-700);
}
.page-about .about-role-list {
  list-style: none;
  margin: 10px 0 0;
  padding: 0;
  display: grid;
  gap: 20px;
}
.page-about .about-role {
  display: grid;
  gap: 8px;
}
.page-about .about-role-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
}
.page-about .about-role-name {
  font-size: 15px;
  font-weight: 700;
  color: var(--ink-base);
}
.page-about .about-role-count {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  color: var(--lava-600);
  letter-spacing: -.01em;
}
.page-about .about-role-track {
  position: relative;
  height: 9px;
  border-radius: 999px;
  background: rgba(58, 63, 71, .13);
  overflow: hidden;
}
.page-about .about-role-fill {
  display: block;
  height: 100%;
  border-radius: 999px;
}
.page-about .about-role-fill--entry {
  width: 55%;
  background: var(--turf-500);
}
.page-about .about-role-fill--tech {
  width: 29%;
  background: var(--volt-400);
}
.page-about .about-role-fill--edit {
  width: 16%;
  background: var(--amber-500);
}
.page-about .about-role-note {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--graphite-700);
}

/* ---------- 观察方法 ---------- */
.page-about .about-method {
  background: var(--ink-base);
  padding: var(--about-section-pad) 0;
}
.page-about .about-method-grid {
  display: grid;
  gap: 26px;
}
.page-about .about-method-media {
  margin: 0;
  border-radius: var(--radius);
  overflow: hidden;
}
.page-about .about-method-media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  border-radius: var(--radius);
}
.page-about .about-method-media .media-caption {
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--graphite-400);
}
.page-about .about-method-list {
  border-top: 1px solid var(--line-dark);
}
.page-about .about-method-list .acc-item {
  border-bottom: 1px solid var(--line-dark);
}
.page-about .about-method-list .acc-trigger {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: 17px 0;
  font-size: 15px;
  font-weight: 600;
  color: var(--paper-000);
  transition: color 180ms var(--ease);
}
.page-about .about-method-list .acc-trigger:hover,
.page-about .about-method-list .acc-trigger:focus-visible {
  color: var(--lava-300);
}
.page-about .about-method-q {
  flex: 1 1 auto;
}
.page-about .about-method-list .acc-icon {
  margin-top: 5px;
}
.page-about .about-method-list .acc-content {
  padding: 0 0 18px;
  color: rgba(252, 250, 246, .72);
}

/* ---------- 工作节奏 ---------- */
.page-about .about-flow {
  background: var(--paper-panel);
  color: var(--ink-base);
  padding: var(--about-section-pad) 0;
}
.page-about .about-flow .section-title {
  color: var(--ink-base);
}
.page-about .about-flow .section-eyebrow {
  color: var(--lava-600);
}
.page-about .about-flow .section-lede {
  color: var(--graphite-700);
}
.page-about .about-flow-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
}
.page-about .about-flow-step {
  display: grid;
  gap: 8px;
  padding: 20px 0 22px;
  border-top: 2px solid var(--lava-600);
}
.page-about .about-flow-step + .about-flow-step {
  border-top-color: var(--line-paper);
  border-top-width: 1px;
}
.page-about .about-flow-time {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--lava-600);
}
.page-about .about-flow-heading {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--ink-base);
}
.page-about .about-flow-step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--graphite-700);
}

/* ---------- 合作与编辑 ---------- */
.page-about .about-partner {
  background: var(--ink-base);
  padding: var(--about-section-pad) 0;
}
.page-about .about-partner-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}
.page-about .about-partner-card {
  position: relative;
  display: grid;
  gap: 8px;
  align-content: start;
  padding: 22px 20px;
  background: rgba(252, 250, 246, .045);
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  border-left: 3px solid var(--lava-600);
}
.page-about .about-partner-num {
  font-family: var(--font-mono);
  font-size: 32px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--lava-300);
}
.page-about .about-partner-name {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
  color: var(--paper-000);
}
.page-about .about-partner-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(252, 250, 246, .68);
}

/* ---------- 下一赛季 ---------- */
.page-about .about-next {
  background: var(--paper-panel);
  color: var(--ink-base);
  padding: var(--about-section-pad) 0;
}
.page-about .about-next .section-title {
  color: var(--ink-base);
}
.page-about .about-next .section-eyebrow {
  color: var(--lava-600);
}
.page-about .about-next .section-lede {
  color: var(--graphite-700);
}
.page-about .about-next-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line-paper);
}
.page-about .about-next-item {
  display: grid;
  grid-template-columns: 16px minmax(0, 1fr);
  gap: 14px;
  padding: 20px 0;
  border-bottom: 1px dashed var(--line-paper);
}
.page-about .about-next-mark {
  width: 12px;
  height: 12px;
  margin-top: 5px;
  border: 2px solid var(--lava-600);
  background: transparent;
  transform: rotate(45deg);
}
.page-about .about-next-heading {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--ink-base);
}
.page-about .about-next-item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--graphite-700);
}

/* ---------- 结尾引导 ---------- */
.page-about .about-cta {
  background: var(--lava-600);
  color: var(--paper-000);
  padding: 40px 0 46px;
}
.page-about .about-cta-inner {
  display: grid;
  gap: 14px;
  max-width: 62ch;
}
.page-about .about-cta .section-title {
  color: var(--paper-000);
  margin: 0;
}
.page-about .about-cta-lede {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(252, 250, 246, .88);
}
.page-about .about-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 6px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 560px) {
  .page-about .about-hero h1 {
    font-size: 36px;
  }
  .page-about .about-tl-trigger {
    grid-template-columns: 84px minmax(0, 1fr) 16px;
    gap: 20px;
  }
  .page-about .about-tl-heading {
    font-size: 17px;
  }
  .page-about .about-hero-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-about {
    --about-section-pad: 58px;
  }
  .page-about .about-hero {
    padding: 30px 0 64px;
  }
  .page-about .about-hero h1 {
    font-size: 46px;
    line-height: 1.18;
  }
  .page-about .about-role-list {
    gap: 22px;
  }
  .page-about .about-partner-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-flow-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0 26px;
  }
  .page-about .about-flow-step {
    grid-template-rows: auto auto 1fr;
  }
  .page-about .about-flow-step + .about-flow-step {
    border-top-color: var(--lava-600);
    border-top-width: 2px;
  }
  .page-about .about-next-list {
    border-top: 0;
  }
  .page-about .about-next-item {
    grid-template-columns: 16px minmax(0, 1fr);
    padding: 22px 0;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero-inner {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    align-items: end;
    gap: 44px;
  }
  .page-about .about-hero-copy {
    gap: 16px;
  }
  .page-about .about-hero h1 {
    font-size: 52px;
  }
  .page-about .about-team-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    gap: 40px;
    align-items: start;
  }
  .page-about .about-team-media {
    position: sticky;
    top: 96px;
  }
  .page-about .about-method-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
    gap: 40px;
    align-items: start;
  }
  .page-about .about-timeline .about-head {
    margin-bottom: 34px;
  }
  .page-about .about-tl-trigger {
    grid-template-columns: 96px minmax(0, 1fr) 18px;
  }
  .page-about .about-tl-panel .acc-content {
    padding-left: 116px;
    max-width: 76ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-role-fill,
  .page-about .acc-icon {
    transition: none;
  }
}
<<<END>>>