.page-about {
  --about-gap: clamp(24px, 4vw, 48px);
  --about-radius: 14px;
  --about-line-soft: rgba(215, 217, 212, .16);
  --about-line-ink: rgba(16, 33, 27, .14);
  background: var(--ink-deep);
  color: var(--paper);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-about .container {
  box-sizing: border-box;
  max-width: var(--shell-max);
  margin-inline: auto;
  padding-inline: var(--edge);
}

/* 面包屑 */
.page-about .about-crumb {
  background: var(--ink-deep-2);
  border-bottom: 1px solid var(--about-line-soft);
  padding-block: 10px;
}
.page-about .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .05em;
}
.page-about .breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  margin-right: 8px;
  color: var(--concrete-light);
  opacity: .45;
}
.page-about .breadcrumb__link {
  color: var(--concrete-light);
  text-decoration: none;
}
.page-about .breadcrumb__link:hover,
.page-about .breadcrumb__link:focus-visible {
  color: var(--lime);
}
.page-about .breadcrumb__link[aria-current="page"] {
  color: var(--lime);
}

/* 首屏 */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding-block: clamp(48px, 9vw, 104px) clamp(40px, 6vw, 72px);
  background: var(--ink-deep);
}
.page-about .about-hero__img {
  position: absolute;
  inset: 0;
  z-index: -2;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .46;
  filter: grayscale(.4) contrast(1.08);
}
.page-about .about-hero__veil {
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(90% 70% at 12% 12%, rgba(198, 255, 46, .14), transparent 62%),
    linear-gradient(180deg, rgba(7, 28, 22, .55) 0%, rgba(7, 28, 22, .9) 58%, var(--ink-deep) 100%);
}
.page-about .about-hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--orange);
}
.page-about .about-hero__eyebrow::before {
  content: "";
  width: 28px;
  height: 2px;
  background: var(--lime);
}
.page-about .about-hero__title {
  margin: 16px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(34px, 8.2vw, 82px);
  line-height: 1.02;
  letter-spacing: -.01em;
  color: var(--paper);
}
.page-about .about-hero__lede {
  max-width: 48ch;
  margin: 20px 0 0;
  font-size: clamp(15px, 1.6vw, 18px);
  line-height: 1.85;
  color: rgba(245, 247, 242, .84);
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding: 0;
  background: var(--about-line-soft);
  border: 1px solid var(--about-line-soft);
  border-radius: var(--about-radius);
  overflow: hidden;
}
.page-about .about-stats__cell {
  display: flex;
  flex-direction: column-reverse;
  gap: 4px;
  padding: 14px 16px;
  background: rgba(11, 42, 33, .82);
}
.page-about .about-stats__value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(19px, 3vw, 26px);
  font-weight: 600;
  line-height: 1.1;
  color: var(--lime);
}
.page-about .about-stats__label {
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--concrete-light);
}

.page-about .about-toc {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  margin: clamp(28px, 4vw, 48px) 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--about-line-soft);
}
.page-about .about-toc__link {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 14px 2px;
  border-bottom: 1px solid var(--about-line-soft);
  color: var(--paper);
  text-decoration: none;
  transition: color .16s ease, padding-left .16s ease;
}
.page-about .about-toc__link:hover,
.page-about .about-toc__link:focus-visible {
  padding-left: 8px;
  color: var(--lime);
}
.page-about .about-toc__num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--lime);
}
.page-about .about-toc__label {
  font-size: 14px;
  letter-spacing: .02em;
}

/* 章节通用 */
.page-about .about-sec {
  padding-block: clamp(52px, 8vw, 104px);
}
.page-about .about-sec--ink {
  background: var(--ink-deep);
  color: var(--paper);
}
.page-about .about-sec--concrete {
  background: var(--concrete);
  color: var(--paper);
}
.page-about .about-sec--paper {
  background: var(--paper);
  color: var(--text-ink);
}
.page-about .about-chapter {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding-bottom: clamp(18px, 3vw, 28px);
  margin-bottom: clamp(24px, 4vw, 44px);
  border-bottom: 1px solid var(--about-line-soft);
}
.page-about .about-sec--paper .about-chapter {
  border-bottom-color: var(--about-line-ink);
}
.page-about .chapter__num {
  font-family: var(--font-mono);
  font-size: clamp(28px, 5vw, 48px);
  font-weight: 600;
  line-height: .85;
  color: var(--lime);
}
.page-about .about-sec--paper .chapter__num {
  color: var(--concrete);
}
.page-about .chapter__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(23px, 3.4vw, 40px);
  line-height: 1.16;
  letter-spacing: .005em;
}
.page-about .chapter__meta {
  margin: 8px 0 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--orange);
}
.page-about .about-sec--paper .chapter__meta {
  color: var(--concrete-2);
}

/* 01 主张 */
.page-about .about-cols {
  display: grid;
  gap: var(--about-gap);
}
.page-about .about-cols__main p {
  max-width: 62ch;
  margin: 0 0 18px;
  font-size: 16px;
  line-height: 1.85;
  color: rgba(245, 247, 242, .86);
}
.page-about .about-cols__main p:last-child {
  margin-bottom: 0;
}
.page-about .about-note {
  align-self: start;
  padding: 22px;
  border: 1px solid var(--about-line-soft);
  border-radius: var(--about-radius);
  background: rgba(168, 181, 174, .13);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}
.page-about .about-note__title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--lime);
}
.page-about .about-note__list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .about-note__link {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 8px;
  border-bottom: 1px dashed var(--about-line-soft);
  color: var(--paper);
  font-size: 14px;
  text-decoration: none;
  transition: color .16s ease;
}
.page-about .about-note__link span:last-child {
  font-family: var(--font-mono);
  color: var(--lime);
}
.page-about .about-note__link:hover,
.page-about .about-note__link:focus-visible {
  color: var(--lime);
}
.page-about .about-note__foot {
  margin: 16px 0 0;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.7;
  color: var(--concrete-light);
}

/* 02 时间线 */
.page-about .about-years {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 clamp(22px, 3vw, 34px);
  padding: 0;
  list-style: none;
}
.page-about .about-years__link {
  display: inline-block;
  padding: 7px 13px;
  border: 1px solid var(--about-line-soft);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--concrete-light);
  text-decoration: none;
  transition: color .16s ease, border-color .16s ease, background .16s ease;
}
.page-about .about-years__link:hover,
.page-about .about-years__link:focus-visible {
  color: var(--lime);
  border-color: var(--lime);
  background: rgba(198, 255, 46, .1);
}
.page-about .about-figure {
  margin: 0 0 clamp(26px, 4vw, 42px);
}
.page-about .about-figure .figure__media {
  overflow: hidden;
  border: 1px solid var(--about-line-soft);
  border-radius: var(--about-radius);
  background: var(--ink-deep-2);
}
.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
}
.page-about .about-figure--team img {
  aspect-ratio: 3 / 2;
}
.page-about .figure__caption {
  margin: 10px 0 0;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.7;
  color: var(--concrete-light);
}

.page-about .about-rail {
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .about-rail__item {
  position: relative;
  padding: 0 0 clamp(24px, 3vw, 34px) 28px;
  border-left: 1px solid var(--line-deep);
}
.page-about .about-rail__item:last-child {
  padding-bottom: 0;
}
.page-about .about-rail__item::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 6px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--concrete);
  border: 2px solid var(--lime);
  box-sizing: border-box;
}
.page-about .about-rail__item:last-child::before {
  background: var(--lime);
  box-shadow: 0 0 0 4px rgba(198, 255, 46, .16);
}
.page-about .about-rail__year {
  display: block;
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 600;
  letter-spacing: .04em;
  color: var(--lime);
}
.page-about .about-rail__title {
  margin: 6px 0 6px;
  font-family: var(--font-display);
  font-size: clamp(18px, 2.2vw, 23px);
  font-weight: 700;
  line-height: 1.3;
  color: var(--paper);
}
.page-about .about-rail__text {
  max-width: 58ch;
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(245, 247, 242, .76);
}

/* 03 团队 */
.page-about .about-team {
  display: grid;
  gap: 14px;
}
.page-about .about-team__lead {
  padding: clamp(22px, 3vw, 32px);
  border-radius: var(--about-radius);
  background: var(--ink-deep);
  color: var(--paper);
}
.page-about .about-team__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(44px, 9vw, 74px);
  font-weight: 600;
  line-height: .8;
  color: var(--lime);
}
.page-about .about-team__title {
  margin: 14px 0 8px;
  font-family: var(--font-display);
  font-size: clamp(19px, 2.4vw, 26px);
  font-weight: 700;
  line-height: 1.25;
}
.page-about .about-team__lead p {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: rgba(245, 247, 242, .8);
}
.page-about .about-team__side {
  display: grid;
  gap: 14px;
}
.page-about .about-team__card {
  padding: 18px 20px;
  border: 1px solid var(--about-line-ink);
  border-left: 3px solid var(--orange);
  border-radius: var(--about-radius);
  background: rgba(16, 33, 27, .035);
}
.page-about .about-team__num-sm {
  display: block;
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 600;
  color: var(--concrete-2);
}
.page-about .about-team__card .about-team__title {
  margin: 6px 0 6px;
  font-size: clamp(17px, 2vw, 21px);
  color: var(--text-ink);
}
.page-about .about-team__card p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: rgba(16, 33, 27, .76);
}
.page-about .about-figure--team {
  margin-top: clamp(26px, 4vw, 40px);
}
.page-about .about-figure--team .figure__media {
  border-color: var(--about-line-ink);
}
.page-about .about-figure--team .figure__caption {
  color: var(--concrete-2);
}

/* 04 流程 */
.page-about .about-flow {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .about-flow__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  padding: 18px 20px;
  border: 1px solid var(--about-line-soft);
  border-radius: var(--about-radius);
  background: rgba(168, 181, 174, .08);
}
.page-about .about-flow__num {
  height: fit-content;
  padding: 3px 9px;
  border-radius: 6px;
  background: var(--lime);
  color: var(--ink-deep);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  white-space: nowrap;
}
.page-about .about-flow__title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: clamp(18px, 2.2vw, 23px);
  font-weight: 700;
  line-height: 1.3;
}
.page-about .about-flow__text {
  max-width: 60ch;
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: rgba(245, 247, 242, .78);
}
.page-about .about-strip {
  display: grid;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 30px);
}
.page-about .about-strip__cell {
  padding: 16px 18px;
  border-left: 2px solid var(--orange);
  background: rgba(255, 154, 61, .08);
}
.page-about .about-strip__value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 17px;
  font-weight: 600;
  color: var(--orange);
}
.page-about .about-strip__label {
  margin: 6px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--concrete-light);
}

/* 05 生态与荣誉 */
.page-about .about-eco {
  display: grid;
  gap: var(--about-gap);
}
.page-about .about-eco__text {
  max-width: 62ch;
  margin: 0 0 22px;
  font-size: 15.5px;
  line-height: 1.85;
  color: rgba(16, 33, 27, .86);
}
.page-about .about-eco__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}
.page-about .about-eco__stat {
  padding-top: 10px;
  border-top: 2px solid var(--lime);
}
.page-about .about-eco__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(26px, 4.4vw, 36px);
  font-weight: 600;
  line-height: 1;
  color: var(--text-ink);
}
.page-about .about-eco__cap {
  margin: 6px 0 0;
  font-size: 12px;
  letter-spacing: .05em;
  color: var(--concrete-2);
}
.page-about .about-honor {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--about-line-ink);
}
.page-about .about-honor__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: baseline;
  padding: 16px 0;
  border-bottom: 1px solid var(--about-line-ink);
}
.page-about .about-honor__year {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 600;
  color: var(--text-ink);
}
.page-about .about-honor__title {
  margin: 0 0 6px;
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--text-ink);
}
.page-about .about-honor__tag {
  display: inline-block;
  padding: 2px 9px;
  border-radius: 999px;
  background: rgba(255, 154, 61, .2);
  color: #8A3F00;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
}

/* 06 联系 */
.page-about .about-contact {
  display: grid;
  gap: var(--about-gap);
}
.page-about .about-contact__main p {
  max-width: 60ch;
  margin: 0 0 16px;
  font-size: 15.5px;
  line-height: 1.85;
  color: rgba(245, 247, 242, .84);
}
.page-about .about-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}
.page-about .about-contact__card {
  align-self: start;
  padding: 22px;
  border: 1px solid var(--about-line-soft);
  border-radius: var(--about-radius);
  background: rgba(168, 181, 174, .12);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}
.page-about .about-contact__kicker {
  margin: 0 0 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--lime);
}
.page-about .about-contact__line {
  margin: 0 0 18px;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--paper);
  word-break: break-word;
}
.page-about .about-contact__line:last-child {
  margin-bottom: 0;
}

/* 响应式 */
@media (min-width: 720px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-toc {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(18px, 3vw, 36px);
    border-top: 0;
  }
  .page-about .about-toc__link {
    border-top: 1px solid var(--about-line-soft);
  }
  .page-about .about-strip {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-honor__item {
    grid-template-columns: 80px minmax(0, 1fr);
  }
}

@media (min-width: 900px) {
  .page-about .about-cols {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
  }
  .page-about .about-rail__item {
    display: grid;
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 22px;
    padding-left: 32px;
  }
  .page-about .about-rail__year {
    font-size: 21px;
  }
  .page-about .about-team {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    align-items: stretch;
  }
  .page-about .about-team__side {
    grid-template-rows: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-eco {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, .85fr);
  }
  .page-about .about-eco__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-contact {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-toc__link,
  .page-about .about-note__link,
  .page-about .about-years__link {
    transition: none;
  }
}