.page-about {
  --about-rail: 96px;
  --about-sticky: 88px;
  background: var(--ink);
  color: var(--paper);
  overflow-x: clip;
}

.page-about .about-section {
  padding: clamp(48px, 8vw, 104px) 0;
}

.page-about .about-head {
  max-width: 44em;
  margin: 0 0 clamp(28px, 5vw, 52px);
}

.page-about .about-head__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.2em;
  color: var(--neon);
  margin-bottom: 12px;
}

.page-about .about-head h2 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: clamp(27px, 5vw, 50px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  font-weight: 800;
  color: var(--paper);
}

.page-about .about-head__lead {
  margin: 0;
  font-size: clamp(15px, 2vw, 17.5px);
  line-height: 1.78;
  color: var(--cement);
  max-width: 36em;
}

/* 封面首屏 */
.page-about .about-cover {
  position: relative;
  padding: clamp(18px, 3.5vw, 32px) 0 clamp(44px, 7vw, 88px);
  overflow: hidden;
}

.page-about .about-cover::before {
  content: "";
  position: absolute;
  right: -24%;
  top: -28%;
  width: min(760px, 100vw);
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  background: radial-gradient(circle at 42% 42%, rgba(182, 255, 59, 0.16), rgba(182, 255, 59, 0) 64%);
  pointer-events: none;
}

.page-about .about-cover::after {
  content: "";
  position: absolute;
  left: -10%;
  bottom: -18%;
  width: min(420px, 70vw);
  height: min(420px, 70vw);
  border-radius: 46% 54% 38% 62%;
  background: rgba(31, 74, 54, 0.42);
  filter: blur(6px);
  pointer-events: none;
}

.page-about .about-cover__inner {
  position: relative;
  z-index: 1;
}

.page-about .breadcrumbs {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--mist);
}

.page-about .breadcrumbs a {
  color: var(--mist);
  text-decoration: none;
}

.page-about .breadcrumbs a:hover,
.page-about .breadcrumbs a:focus-visible {
  color: var(--neon);
}

.page-about .about-cover .eyebrow {
  margin-top: clamp(20px, 3vw, 32px);
}

.page-about .about-cover__title {
  margin: clamp(14px, 2.4vw, 24px) 0 0;
  font-family: var(--font-display);
  font-size: clamp(38px, 8.6vw, 104px);
  line-height: 0.98;
  letter-spacing: -0.03em;
  font-weight: 800;
  color: var(--paper);
}

.page-about .about-cover__title span {
  color: var(--neon);
}

.page-about .about-cover__lead {
  max-width: 34em;
  margin: clamp(18px, 3vw, 28px) 0 0;
  font-size: clamp(16px, 2.2vw, 19.5px);
  line-height: 1.78;
  color: var(--cement);
}

.page-about .about-cover__index {
  margin-top: clamp(28px, 5vw, 46px);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .about-cover__index-link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 15px 14px;
  background: var(--ink);
  color: var(--paper);
  text-decoration: none;
  font-size: 15px;
  line-height: 1.4;
  transition: background 0.18s ease, color 0.18s ease;
}

.page-about .about-cover__index-link:hover,
.page-about .about-cover__index-link:focus-visible {
  background: var(--neon);
  color: var(--ink);
}

.page-about .about-cover__index-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--neon);
}

.page-about .about-cover__index-link:hover .about-cover__index-num,
.page-about .about-cover__index-link:focus-visible .about-cover__index-num {
  color: var(--ink);
}

.page-about .about-cover__actions {
  margin-top: clamp(24px, 4vw, 36px);
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-cover__note {
  display: none;
  position: absolute;
  right: 4px;
  bottom: 0;
  writing-mode: vertical-rl;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--mist);
}

/* 年份时间线 */
.page-about .timeline {
  display: grid;
  gap: clamp(22px, 4vw, 40px);
}

.page-about .timeline__rail {
  display: flex;
  align-items: stretch;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
  scrollbar-width: none;
}

.page-about .timeline__rail::-webkit-scrollbar {
  display: none;
}

.page-about .year-link {
  flex: none;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  padding: 8px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius-chip);
  color: var(--cement);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}

.page-about .year-link:hover,
.page-about .year-link:focus-visible {
  border-color: var(--neon);
  color: var(--neon);
}

.page-about .year-link[aria-current="current"] {
  background: var(--neon);
  border-color: var(--neon);
  color: var(--ink);
}

.page-about .timeline__body {
  min-width: 0;
}

.page-about .mile {
  padding: clamp(18px, 3vw, 26px) 0;
  border-top: 1px solid var(--line-soft);
}

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

.page-about .mile__year {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: clamp(22px, 4vw, 32px);
  letter-spacing: 0.04em;
  color: var(--neon);
}

.page-about .mile__title {
  margin: 0 0 12px;
  font-size: clamp(19px, 2.6vw, 26px);
  line-height: 1.34;
  color: var(--paper);
  font-weight: 700;
}

.page-about .mile__text {
  margin: 0 0 14px;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--cement);
}

.page-about .mile__gain {
  margin: 0;
  padding-left: 14px;
  border-left: 2px solid var(--neon);
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--paper);
}

/* 四道工序 */
.page-about .workflow {
  display: grid;
  gap: clamp(20px, 4vw, 36px);
}

.page-about .process {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .process__step {
  background: var(--ink);
  padding: clamp(18px, 3vw, 26px);
}

.page-about .process__num {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--neon);
}

.page-about .process__title {
  margin: 8px 0 10px;
  font-size: 19px;
  line-height: 1.35;
  color: var(--paper);
  font-weight: 700;
}

.page-about .process__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--cement);
}

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

.page-about .aside-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: var(--radius-organic);
}

.page-about .aside-figure__cap {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  line-height: 1.6;
  color: var(--mist);
}

.page-about .injury-legend {
  margin-top: clamp(24px, 4vw, 40px);
  padding: clamp(18px, 3vw, 26px);
  border: 1px solid var(--line);
  border-radius: var(--radius-organic);
  background: var(--ink-2);
}

.page-about .injury-legend__title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--neon);
}

.page-about .injury-legend__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .injury-legend__list li {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--cement);
}

.page-about .injury-legend__note {
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line-soft);
  font-size: 15px;
  line-height: 1.78;
  color: var(--paper);
  max-width: 38em;
}

/* 规模概览 */
.page-about .dash {
  display: grid;
  gap: clamp(22px, 4vw, 40px);
}

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

.page-about .stat {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: clamp(16px, 3vw, 24px);
  background: var(--ink);
}

.page-about .stat__num {
  font-family: var(--font-display);
  font-size: clamp(34px, 6vw, 58px);
  line-height: 1;
  letter-spacing: -0.02em;
  font-weight: 800;
  color: var(--neon);
}

.page-about .stat__num em {
  font-style: normal;
  font-size: 0.58em;
}

.page-about .stat__label {
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--cement);
}

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

.page-about .dash__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: var(--radius-organic);
  border: 1px solid var(--line);
}

.page-about .dash__cap {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  line-height: 1.6;
  color: var(--mist);
}

/* 宽幅过渡 */
.page-about .about-wide-band {
  padding: 0;
}

.page-about .about-wide {
  margin: 0;
  position: relative;
}

.page-about .about-wide img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 8 / 3;
  object-fit: cover;
}

.page-about .about-wide__cap {
  position: absolute;
  left: clamp(16px, 4vw, 48px);
  bottom: clamp(14px, 3vw, 28px);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--paper);
  background: rgba(7, 28, 23, 0.72);
  padding: 6px 12px;
  border-radius: var(--radius-chip);
}

/* 团队 */
.page-about .about-crew {
  color: var(--ink);
}

.page-about .about-crew .about-head h2 {
  color: var(--ink);
}

.page-about .about-crew .about-head__num {
  color: var(--turf);
}

.page-about .about-crew .about-head__lead {
  color: var(--turf);
}

.page-about .crews {
  display: grid;
  gap: clamp(14px, 2.5vw, 20px);
}

.page-about .crew {
  background: var(--ink);
  color: var(--paper);
  border-radius: var(--radius-organic);
  padding: clamp(20px, 3vw, 28px);
  border: 1px solid rgba(31, 74, 54, 0.9);
}

.page-about .crew__count {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: clamp(42px, 7vw, 62px);
  line-height: 1;
  letter-spacing: -0.02em;
  font-weight: 800;
  color: var(--neon);
}

.page-about .crew__role {
  margin: 0 0 10px;
  font-size: 20px;
  line-height: 1.35;
  color: var(--paper);
  font-weight: 700;
}

.page-about .crew__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--cement);
}

.page-about .crew__more {
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px solid var(--line-soft);
}

.page-about .crew__more summary {
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--neon);
}

.page-about .crew__more summary:hover,
.page-about .crew__more summary:focus-visible {
  color: var(--ref);
}

.page-about .crew__more p {
  margin: 10px 0 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--cement);
}

.page-about .crew-rhythm {
  margin-top: clamp(24px, 4vw, 40px);
  padding-top: 20px;
  border-top: 1px solid rgba(7, 28, 23, 0.18);
}

.page-about .crew-rhythm__title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--turf);
}

.page-about .crew-rhythm ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .crew-rhythm li {
  display: grid;
  grid-template-columns: 4.2em minmax(0, 1fr);
  gap: 10px;
  padding-bottom: 12px;
  border-bottom: 1px dashed rgba(7, 28, 23, 0.16);
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink);
}

.page-about .crew-rhythm b {
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--turf);
}

/* 合作与荣誉 */
.page-about .partners {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .partner {
  background: var(--ink);
  padding: clamp(18px, 3vw, 26px);
}

.page-about .partner__count {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: clamp(30px, 5vw, 44px);
  line-height: 1;
  font-weight: 800;
  color: var(--ref);
}

.page-about .partner__title {
  margin: 0 0 10px;
  font-size: 18px;
  line-height: 1.35;
  color: var(--paper);
  font-weight: 700;
}

.page-about .partner__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--cement);
}

.page-about .awards {
  margin-top: clamp(24px, 4vw, 38px);
}

.page-about .awards__title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--neon);
}

.page-about .awards__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .award {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
  padding: 14px clamp(14px, 2.5vw, 20px);
  background: var(--ink-2);
  font-size: 15px;
  line-height: 1.6;
  color: var(--paper);
}

.page-about .award__year {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--neon);
}

/* 三条视角 */
.page-about .tenets {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(16px, 3vw, 24px);
}

.page-about .tenet {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 16px;
  padding: clamp(18px, 3vw, 26px) 0;
  border-top: 1px solid var(--line);
}

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

.page-about .tenet__num {
  font-family: var(--font-display);
  font-size: clamp(28px, 4.5vw, 40px);
  line-height: 0.9;
  font-weight: 800;
  color: var(--turf);
  letter-spacing: -0.02em;
}

.page-about .tenet__body h3 {
  margin: 0 0 10px;
  font-size: clamp(19px, 2.4vw, 23px);
  line-height: 1.35;
  color: var(--paper);
  font-weight: 700;
}

.page-about .tenet__body p {
  margin: 0;
  max-width: 36em;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--cement);
}

/* 收束 */
.page-about .about-cta {
  padding: clamp(40px, 7vw, 88px) 0 clamp(52px, 8vw, 104px);
}

.page-about .about-cta__inner {
  position: relative;
  padding: clamp(24px, 5vw, 48px);
  border-radius: 34px 8px 34px 8px;
  background: linear-gradient(120deg, rgba(31, 74, 54, 0.9), rgba(14, 42, 34, 0.9) 58%, rgba(7, 28, 23, 0.9));
  border: 1px solid var(--line);
}

.page-about .about-cta__inner h2 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: clamp(26px, 4.6vw, 44px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  font-weight: 800;
  color: var(--paper);
}

.page-about .about-cta__lead {
  margin: 0 0 clamp(20px, 3.5vw, 30px);
  max-width: 36em;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--cement);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

@media (min-width: 720px) {
  .page-about .about-cover__index {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-about .partners {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .crews {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
  }

  .page-about .crew:nth-child(2) {
    margin-top: 28px;
  }

  .page-about .crew:nth-child(3) {
    margin-top: 56px;
  }
}

@media (min-width: 900px) {
  .page-about .about-cover__note {
    display: block;
  }

  .page-about .timeline {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .timeline__rail {
    position: sticky;
    top: var(--about-sticky);
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
    border-bottom: 0;
    border-left: 1px solid var(--line);
  }

  .page-about .year-link {
    padding: 12px 0 12px 16px;
    margin-left: -1px;
    border: 0;
    border-left: 2px solid transparent;
    border-radius: 0;
    text-align: left;
  }

  .page-about .year-link:hover,
  .page-about .year-link:focus-visible {
    border-left-color: var(--neon);
  }

  .page-about .year-link[aria-current="current"] {
    background: transparent;
    border-left-color: var(--neon);
    color: var(--neon);
  }

  .page-about .mile {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    padding: clamp(22px, 3vw, 32px) 0;
  }

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

  .page-about .aside-figure {
    position: sticky;
    top: var(--about-sticky);
  }

  .page-about .injury-legend {
    display: grid;
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    gap: 0 clamp(24px, 4vw, 40px);
    align-items: start;
  }

  .page-about .injury-legend__title {
    grid-column: 1;
    margin-bottom: 14px;
  }

  .page-about .injury-legend__list {
    grid-column: 1;
    grid-row: 2;
  }

  .page-about .injury-legend__note {
    grid-column: 2;
    grid-row: 1 / span 2;
    margin: 0;
    padding: 0 0 0 clamp(20px, 3vw, 32px);
    border-top: 0;
    border-left: 1px solid var(--line);
  }

  .page-about .dash {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: start;
  }

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

  .page-about .about-wide img {
    aspect-ratio: 16 / 6;
  }

  .page-about .crew-rhythm li {
    grid-template-columns: 5em minmax(0, 1fr);
  }
}

@media (min-width: 1180px) {
  .page-about .process {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-cover__lead {
    max-width: 32em;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-cover__index-link,
  .page-about .year-link,
  .page-about .crew__more summary {
    transition: none;
  }
}