.page-about {
  --about-rail: 208px;
  --about-light-2: #D6DCD3;
  --about-light-3: #C6CEC2;
  --about-line-light: rgba(10, 12, 11, 0.16);
  display: block;
  background: var(--ink);
  color: var(--white);
}

.page-about .about-hero {
  padding: 28px 0 56px;
  background:
    linear-gradient(180deg, rgba(43, 54, 65, 0.55) 0%, rgba(10, 12, 11, 0) 62%),
    var(--ink);
}

.page-about .about-hero__layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-top: 28px;
}

.page-about .about-hero__side {
  display: flex;
  align-items: baseline;
  gap: 10px;
  border-left: 2px solid var(--neon);
  padding-left: 12px;
}

.page-about .about-hero__side-num {
  font-size: var(--fs-40);
  line-height: 1;
  color: var(--neon);
  font-weight: 700;
}

.page-about .about-hero__side-word {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.28em;
  color: var(--silver);
}

.page-about .about-hero__main h1 {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: var(--fs-40);
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin: 12px 0 18px;
  color: var(--white);
}

.page-about .about-hero__lead {
  font-size: var(--fs-16);
  line-height: 1.75;
  color: var(--silver);
  max-width: 62ch;
}

.page-about .about-hero__facts {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--grid);
  border: 1px solid var(--grid);
}

.page-about .about-hero__fact {
  background: var(--ink-2);
  padding: 16px 14px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-hero__fact-num {
  font-size: var(--fs-28);
  line-height: 1;
  color: var(--white);
  font-weight: 700;
}

.page-about .about-hero__fact-unit {
  font-size: var(--fs-14);
  color: var(--neon);
  margin-left: 2px;
}

.page-about .about-hero__fact-label {
  font-size: var(--fs-12);
  color: var(--silver);
  letter-spacing: 0.04em;
}

.page-about .about-hero__figure {
  position: relative;
  margin: 32px 0 0;
  border: 1px solid var(--grid);
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--ink-2);
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(0.35) contrast(1.06);
}

.page-about .about-hero__figure .figure__tag {
  position: absolute;
  left: 0;
  bottom: 0;
  background: var(--ink);
  color: var(--neon);
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.08em;
  padding: 8px 14px;
  border-top: 1px solid var(--grid);
  border-right: 1px solid var(--grid);
}

/* 章节通用标题 */
.page-about .about-head {
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  gap: 14px;
  border-top: 1px solid var(--grid);
  padding-top: 18px;
  margin-bottom: 28px;
}

.page-about .about-head__latin {
  writing-mode: vertical-rl;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--neon);
  align-self: start;
}

.page-about .about-head__title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: var(--fs-28);
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin: 0;
  color: var(--white);
}

.page-about .about-head__sub {
  grid-column: 2;
  margin: 10px 0 0;
  font-size: var(--fs-14);
  color: var(--silver);
  line-height: 1.7;
}

/* 我们在做的事 */
.page-about .about-intro {
  padding: 8px 0 64px;
}

.page-about .about-intro__body {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.page-about .about-intro__p {
  font-size: var(--fs-16);
  line-height: 1.8;
  color: var(--silver);
  max-width: 64ch;
  margin: 0;
}

.page-about .about-intro__p strong {
  color: var(--white);
}

.page-about .about-intro__points {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--grid);
  border: 1px solid var(--grid);
}

.page-about .about-intro__points li {
  background: var(--ink-2);
  padding: 18px 16px;
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 4px 12px;
  align-items: baseline;
  transition: background 180ms ease, transform 180ms ease;
}

.page-about .about-intro__points li:hover {
  background: var(--grid);
  transform: translateY(-2px);
}

.page-about .about-intro__idx {
  grid-row: span 2;
  font-size: var(--fs-20);
  color: var(--neon);
  line-height: 1.2;
}

.page-about .about-intro__points strong {
  font-size: var(--fs-16);
  color: var(--white);
  font-weight: 700;
}

.page-about .about-intro__points span:last-child {
  font-size: var(--fs-14);
  color: var(--silver);
  line-height: 1.7;
}

/* 时间轴 */
.page-about .about-timeline {
  padding: 0 0 72px;
}

.page-about .about-timeline__layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.page-about .about-timeline__rail {
  border-left: 1px solid var(--grid);
  padding-left: 16px;
}

.page-about .about-timeline__list {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.page-about .about-timeline__list::before {
  content: "";
  position: absolute;
  left: -16px;
  top: 10px;
  bottom: 0;
  width: 1px;
  background: linear-gradient(180deg, var(--neon) 0%, var(--grid) 70%, rgba(43, 54, 65, 0) 100%);
}

.page-about .about-timeline__node + .about-timeline__node {
  margin-top: 2px;
}

.page-about .about-timeline__link {
  position: relative;
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 2px 10px;
  padding: 12px 12px 12px 14px;
  text-decoration: none;
  color: inherit;
  border: 1px solid transparent;
  transition: background 180ms ease, border-color 180ms ease;
}

.page-about .about-timeline__link:hover,
.page-about .about-timeline__link:focus-visible {
  background: var(--ink-2);
  border-color: var(--grid);
}

.page-about .about-timeline__link:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 2px;
}

.page-about .about-timeline__dot {
  position: absolute;
  left: -22px;
  top: 20px;
  width: 9px;
  height: 9px;
  background: var(--ink);
  border: 1px solid var(--neon);
  transition: background 180ms ease, transform 180ms ease, box-shadow 180ms ease;
}

.page-about .about-timeline__link:hover .about-timeline__dot,
.page-about .about-timeline__link:focus-visible .about-timeline__dot {
  background: var(--neon);
  transform: scale(1.25);
  box-shadow: 0 0 0 4px rgba(180, 255, 46, 0.14);
}

.page-about .about-timeline__ver {
  grid-row: span 2;
  font-size: var(--fs-16);
  color: var(--neon);
  line-height: 1.4;
}

.page-about .about-timeline__name {
  font-size: var(--fs-14);
  font-weight: 700;
  color: var(--white);
  line-height: 1.4;
}

.page-about .about-timeline__meta {
  font-size: var(--fs-12);
  color: var(--silver);
  line-height: 1.5;
}

.page-about .about-timeline__tail {
  margin: 14px 0 0;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.12em;
  color: var(--silver);
}

.page-about .about-timeline__panels {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
}

.page-about .about-stage {
  border-top: 1px solid var(--grid);
  padding: 24px 0 26px;
}

.page-about .about-stage__ver {
  display: inline-block;
  font-size: var(--fs-12);
  letter-spacing: 0.18em;
  color: var(--ink);
  background: var(--neon);
  padding: 3px 8px;
  margin: 0 0 12px;
}

.page-about .about-stage__title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: var(--fs-20);
  letter-spacing: -0.01em;
  margin: 0 0 10px;
  color: var(--white);
}

.page-about .about-stage__text,
.page-about .about-stage__stat {
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--silver);
  margin: 0;
  max-width: 58ch;
}

.page-about .about-stage__stat {
  margin-top: 12px;
  color: var(--orange);
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.06em;
}

.page-about .about-stage__figure {
  position: relative;
  margin: 24px 0 0;
  border: 1px solid var(--grid);
  aspect-ratio: 2 / 1;
  overflow: hidden;
  background: var(--ink-2);
}

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

.page-about .about-stage__figure .figure__tag {
  position: absolute;
  left: 0;
  bottom: 0;
  background: var(--ink);
  color: var(--silver);
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  padding: 6px 12px;
  border-top: 1px solid var(--grid);
  border-right: 1px solid var(--grid);
}

/* 团队 */
.page-about .about-team {
  padding: 0 0 72px;
}

.page-about .about-team__panel {
  background: var(--mist);
  border: 1px solid var(--about-light-3);
  padding: 28px 20px 32px;
}

.page-about .about-team__head {
  border-bottom: 1px solid var(--about-line-light);
  padding-bottom: 20px;
  margin-bottom: 24px;
}

.page-about .about-team__eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.16em;
  color: #4A5A22;
  margin: 0 0 12px;
}

.page-about .about-team__title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: var(--fs-28);
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--ink);
  margin: 0 0 12px;
}

.page-about .about-team__lede {
  font-size: var(--fs-16);
  line-height: 1.75;
  color: #38403A;
  max-width: 62ch;
  margin: 0;
}

.page-about .about-team__body {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

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

.page-about .about-team__col {
  background: var(--mist);
  padding: 20px 16px;
  transition: background 180ms ease, transform 180ms ease;
}

.page-about .about-team__col:hover {
  background: var(--about-light-2);
  transform: translateY(-2px);
}

.page-about .about-team__idx {
  display: block;
  font-size: var(--fs-12);
  letter-spacing: 0.16em;
  color: #4A5A22;
  margin-bottom: 10px;
}

.page-about .about-team__name {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: var(--fs-20);
  color: var(--ink);
  margin: 0 0 8px;
}

.page-about .about-team__text {
  font-size: var(--fs-14);
  line-height: 1.75;
  color: #38403A;
  margin: 0;
}

.page-about .about-team__figure {
  margin: 0;
  border: 1px solid var(--about-light-3);
  aspect-ratio: 1 / 1;
  overflow: hidden;
  background: var(--about-light-2);
}

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  mix-blend-mode: multiply;
}

/* 数据与内容体系 */
.page-about .about-system {
  padding: 0 0 72px;
}

.page-about .about-system__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--grid);
  border: 1px solid var(--grid);
}

.page-about .about-stat {
  background: var(--ink-2);
  padding: 20px 16px 22px;
  border-left: 2px solid var(--neon);
  transition: background 180ms ease;
}

.page-about .about-stat--orange {
  border-left-color: var(--orange);
}

.page-about .about-stat:hover {
  background: var(--grid);
}

.page-about .about-stat__num {
  display: block;
  font-size: var(--fs-28);
  font-weight: 700;
  line-height: 1;
  color: var(--white);
}

.page-about .about-stat__unit {
  font-size: var(--fs-14);
  color: var(--silver);
  margin-left: 3px;
}

.page-about .about-stat--orange .about-stat__num {
  color: var(--orange);
}

.page-about .about-stat__label {
  display: block;
  margin-top: 10px;
  font-size: var(--fs-14);
  color: var(--white);
  font-weight: 700;
  letter-spacing: 0.02em;
}

.page-about .about-stat__desc {
  margin: 6px 0 0;
  font-size: var(--fs-12);
  line-height: 1.7;
  color: var(--silver);
}

.page-about .about-system__more {
  margin: 24px 0 0;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--silver);
}

.page-about .about-system__more a {
  color: var(--neon);
  text-decoration: none;
  border-bottom: 1px solid var(--neon-2);
  padding-bottom: 1px;
}

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

.page-about .about-system__more a:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 2px;
}

/* 支持 */
.page-about .about-support {
  padding: 0 0 80px;
}

.page-about .about-support__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--grid);
  border: 1px solid var(--grid);
}

.page-about .about-support__col {
  background: var(--ink-2);
  padding: 22px 18px 24px;
  transition: background 180ms ease, transform 180ms ease;
}

.page-about .about-support__col:hover {
  background: var(--grid);
  transform: translateY(-2px);
}

.page-about .about-support__idx {
  display: block;
  font-size: var(--fs-12);
  letter-spacing: 0.18em;
  color: var(--neon);
  margin-bottom: 12px;
}

.page-about .about-support__name {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: var(--fs-20);
  color: var(--white);
  margin: 0 0 10px;
}

.page-about .about-support__text {
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--silver);
  margin: 0;
}

.page-about .about-contact {
  margin-top: 28px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--grid);
  border: 1px solid var(--grid);
}

.page-about .about-contact__item {
  background: var(--ink);
  padding: 14px 16px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px 16px;
  align-items: baseline;
}

.page-about .about-contact__key {
  min-width: 72px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.12em;
  color: var(--silver);
}

.page-about .about-contact__val {
  font-size: var(--fs-14);
  color: var(--white);
  word-break: break-word;
}

.page-about .about-cta {
  margin-top: 32px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

@media (min-width: 720px) {
  .page-about .about-hero {
    padding: 36px 0 72px;
  }

  .page-about .about-hero__layout {
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 32px;
    align-items: start;
  }

  .page-about .about-hero__side {
    flex-direction: column;
    align-items: flex-start;
    border-left: 0;
    border-right: 1px solid var(--grid);
    padding: 0 16px 0 0;
    min-height: 180px;
  }

  .page-about .about-hero__side-num {
    font-size: var(--fs-64);
  }

  .page-about .about-hero__side-word {
    writing-mode: vertical-rl;
    letter-spacing: 0.3em;
  }

  .page-about .about-hero__main h1 {
    font-size: var(--fs-64);
  }

  .page-about .about-hero__lead {
    font-size: var(--fs-20);
  }

  .page-about .about-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-hero__figure {
    margin-top: 44px;
  }

  .page-about .about-head {
    grid-template-columns: 30px minmax(0, 1fr);
    gap: 20px;
    margin-bottom: 36px;
  }

  .page-about .about-head__title {
    font-size: var(--fs-40);
  }

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

  .page-about .about-timeline__layout {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: 48px;
  }

  .page-about .about-timeline__rail {
    position: sticky;
    top: 96px;
    align-self: start;
  }

  .page-about .about-stage {
    padding: 28px 0 30px;
  }

  .page-about .about-stage__title {
    font-size: var(--fs-28);
  }

  .page-about .about-team__panel {
    padding: 40px 32px 44px;
  }

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

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

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

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

@media (min-width: 1024px) {
  .page-about .about-hero__layout {
    grid-template-columns: 112px minmax(0, 1fr);
    gap: 48px;
  }

  .page-about .about-intro__body {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 32px 48px;
    align-items: start;
  }

  .page-about .about-intro__p {
    grid-column: 1;
  }

  .page-about .about-intro__points {
    grid-column: 1 / -1;
  }

  .page-about .about-team__body {
    grid-template-columns: minmax(0, 1fr) 280px;
    gap: 32px;
    align-items: start;
  }

  .page-about .about-team__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-about .about-system__more {
    max-width: 72ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-intro__points li,
  .page-about .about-timeline__link,
  .page-about .about-timeline__dot,
  .page-about .about-team__col,
  .page-about .about-stat,
  .page-about .about-support__col {
    transition: none;
  }

  .page-about .about-intro__points li:hover,
  .page-about .about-team__col:hover,
  .page-about .about-support__col:hover {
    transform: none;
  }
}