.page-about .about-hero {
  position: relative;
  overflow: hidden;
  background: var(--c-ink);
  color: var(--c-reading);
  padding: clamp(88px, 10vw, 132px) 0 clamp(52px, 6vw, 80px);
  border-bottom: 3px solid var(--c-gold);
}
.page-about .about-hero .container {
  position: relative;
  z-index: 2;
}
.page-about .about-hero .breadcrumb {
  margin-bottom: clamp(32px, 5vw, 64px);
}
.page-about .about-hero__inner {
  position: relative;
  z-index: 2;
  max-width: 820px;
}
.page-about .about-hero__eyebrow {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--c-gold);
  margin: 0 0 20px;
}
.page-about .about-hero__title {
  font-family: var(--font-sans);
  font-size: clamp(52px, 8vw, 104px);
  font-weight: 800;
  line-height: 0.95;
  letter-spacing: -0.04em;
  color: var(--c-paper);
  margin: 0 0 24px;
}
.page-about .about-hero__title span {
  color: var(--c-gold);
}
.page-about .about-hero__lede {
  max-width: 560px;
  margin: 0 0 36px;
  padding-left: 20px;
  border-left: 3px solid var(--c-gold);
  font-size: clamp(15px, 1.4vw, 19px);
  line-height: 1.85;
  color: var(--c-reading);
}
.page-about .about-hero__statline {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 36px;
}
.page-about .about-hero__stat {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--c-silver);
  display: inline-flex;
  align-items: baseline;
}
.page-about .about-hero__stat b {
  font-size: 30px;
  font-weight: 800;
  color: var(--c-gold);
  margin-right: 8px;
  line-height: 1;
}
.page-about .about-hero__deco {
  position: absolute;
  right: -60px;
  bottom: 0;
  width: min(60vw, 560px);
  opacity: 0.65;
  pointer-events: none;
  z-index: 1;
}

.page-about .about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
}
.page-about .about-aside {
  background: var(--c-ink);
  border-bottom: 1px solid rgba(245, 178, 62, 0.25);
  padding: 0 16px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.page-about .about-aside__inner {
  display: flex;
  align-items: center;
  gap: 4px 18px;
  min-height: 52px;
}
.page-about .about-aside__item {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  color: var(--c-silver);
  text-decoration: none;
  white-space: nowrap;
  padding: 8px 4px;
  border-bottom: 2px solid transparent;
  transition: border-color var(--ease), color var(--ease);
}
.page-about .about-aside__item:hover {
  color: var(--c-gold);
  border-bottom-color: var(--c-gold);
}
.page-about .about-aside__num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--c-gold);
}
.page-about .about-aside__txt {
  font-size: 14px;
  font-weight: 500;
}
.page-about .about-aside__foot {
  display: none;
}

.page-about .about-main {
  min-width: 0;
}
.page-about .about-section {
  position: relative;
  padding: clamp(56px, 7vw, 104px) clamp(20px, 4vw, 64px);
}
.page-about .about-section .container {
  max-width: 1120px;
}
.page-about .about-section .section-heading {
  margin-bottom: 12px;
}
.page-about .about-section .section-heading__title {
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 800;
  letter-spacing: -0.02em;
}
.page-about .about-section .section-heading__index {
  color: var(--c-gold);
}

.page-about .about-position {
  background: var(--c-paper);
  color: var(--c-char);
}
.page-about .about-position::after {
  content: "";
  position: absolute;
  right: 6%;
  bottom: -1px;
  width: 180px;
  height: 4px;
  background: var(--c-gold);
  border-radius: 2px;
}
.page-about .about-position__grid {
  display: grid;
  grid-template-columns: mixmax(0, 1fr);
  gap: 36px;
  margin-top: 36px;
  align-items: center;
}
.page-about .about-position__copy > p {
  font-size: 16px;
  line-height: 1.8;
  color: var(--c-char);
  margin: 0 0 18px;
}
.page-about .about-position__facts {
  list-style: none;
  padding: 0;
  margin: 28px 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.page-about .about-fact {
  flex: 1 1 160px;
  min-width: 140px;
  background: var(--c-ink);
  color: var(--c-reading);
  border-radius: var(--r-md);
  padding: 18px 20px;
  border-bottom: 3px solid var(--c-gold);
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.page-about .about-fact__num {
  font-family: var(--font-mono);
  font-size: 38px;
  font-weight: 800;
  color: var(--c-gold);
  line-height: 1;
}
.page-about .about-fact__unit {
  font-size: 14px;
  color: var(--c-reading);
  margin-top: 4px;
}
.page-about .about-fact__label {
  font-size: 13px;
  color: var(--c-silver);
}
.page-about .about-position__figure {
  margin: 0;
  background: var(--c-ink);
  border-radius: var(--r-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
.page-about .about-position__figure img {
  width: 100%;
  height: auto;
  max-width: 240px;
  border-radius: var(--r-sm);
}
.page-about .about-position__figure figcaption {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--c-silver);
  margin-top: 14px;
  text-align: center;
  letter-spacing: 0.05em;
}

.page-about .about-timeline {
  background: linear-gradient(160deg, #0A1428 0%, #0E1B35 70%, #17315C 100%);
  color: var(--c-reading);
}
.page-about .about-timeline::before {
  content: "";
  position: absolute;
  top: 90px;
  right: -80px;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(123, 92, 255, 0.14), transparent 70%);
  pointer-events: none;
}
.page-about .about-timeline .section-heading__title {
  color: var(--c-paper);
}
.page-about .about-timeline__wrap {
  position: relative;
  margin-top: 44px;
}
.page-about .about-timeline__line {
  position: absolute;
  left: 0;
  top: 0;
  width: 64px;
  height: calc(100% - 32px);
  pointer-events: none;
}
.page-about .about-timeline__list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-about .about-milestone {
  position: relative;
  display: grid;
  grid-template-columns: 64px 72px minmax(0, 1fr);
  gap: 8px;
  align-items: start;
  padding: 32px 0;
}
.page-about .about-milestone:not(:last-child) {
  border-bottom: 1px solid rgba(198, 205, 218, 0.14);
}
.page-about .about-milestone__dot {
  position: relative;
  display: block;
  justify-self: center;
  align-self: start;
  margin-top: 14px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--c-gold);
  box-shadow: 0 0 0 4px rgba(245, 178, 62, 0.15), 0 0 20px rgba(245, 178, 62, 0.35);
  transition: transform var(--ease), box-shadow var(--ease);
  cursor: default;
}
.page-about .about-milestone__dot::before {
  content: "查看详情";
  position: absolute;
  left: 26px;
  top: -6px;
  background: var(--c-gold);
  color: var(--c-ink);
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1;
  padding: 5px 8px;
  border-radius: 4px;
  white-space: nowrap;
  opacity: 0;
  transform: translateX(-6px);
  transition: opacity var(--ease), transform var(--ease);
  pointer-events: none;
  z-index: 4;
}
.page-about .about-milestone__dot:hover::before {
  opacity: 1;
  transform: translateX(0);
}
.page-about .about-milestone__year {
  font-family: var(--font-mono);
  font-size: 42px;
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1;
  color: var(--c-silver);
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  text-orientation: mixed;
  align-self: center;
  justify-self: center;
  opacity: 0.85;
  transition: color var(--ease), opacity var(--ease);
}
.page-about .about-milestone__card h3 {
  margin: 0 0 8px;
  font-size: 21px;
  font-weight: 700;
  color: var(--c-paper);
}
.page-about .about-milestone__card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-reading);
  max-width: 560px;
}
.page-about .about-milestone__extra {
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  margin: 0;
  transition: max-height 0.35s ease, opacity 0.35s ease, margin-top 0.35s ease;
  font-size: 13px;
  line-height: 1.7;
  color: var(--c-silver);
  border-left: 2px solid var(--c-violet);
  padding-left: 12px;
}
.page-about .about-milestone:hover .about-milestone__extra,
.page-about .about-milestone:focus-within .about-milestone__extra {
  max-height: 80px;
  opacity: 1;
  margin-top: 10px;
}
.page-about .about-milestone:hover .about-milestone__dot {
  transform: scale(1.35);
  box-shadow: 0 0 0 6px rgba(245, 178, 62, 0.28), 0 0 36px rgba(245, 178, 62, 0.55);
}
.page-about .about-milestone:hover .about-milestone__year {
  color: var(--c-gold);
  opacity: 1;
}

.page-about .about-standard {
  background: var(--c-paper);
  color: var(--c-char);
}
.page-about .about-standard__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 36px;
  margin-top: 36px;
  align-items: start;
}
.page-about .about-standard__copy > p {
  font-size: 16px;
  line-height: 1.8;
  color: var(--c-char);
  margin: 0 0 20px;
}
.page-about .about-standard__steps {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.page-about .about-standard__steps li {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  background: #ffffff;
  border: 1px solid var(--c-silver);
  border-left: 4px solid var(--c-gold);
  border-radius: var(--r-md);
  padding: 18px 20px;
  transition: box-shadow var(--ease), transform var(--ease);
}
.page-about .about-standard__steps li:hover {
  box-shadow: 0 8px 24px rgba(10, 20, 40, 0.08);
  transform: translateX(4px);
}
.page-about .about-step__num {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: var(--c-ink);
  color: var(--c-gold);
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}
.page-about .about-step__body h3 {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 700;
  color: var(--c-ink);
}
.page-about .about-step__body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.65;
  color: var(--c-char);
}
.page-about .about-standard__figure {
  margin: 0;
  background: var(--c-ink);
  border-radius: var(--r-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.page-about .about-standard__figure img {
  width: 100%;
  height: auto;
  border-radius: var(--r-sm);
  display: block;
}
.page-about .about-standard__figure figcaption {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--c-silver);
  margin-top: 12px;
  text-align: center;
}
.page-about .about-standard__stats {
  list-style: none;
  margin: 44px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  background: var(--c-ink);
  border-radius: var(--r-lg);
  overflow: hidden;
}
.page-about .about-standard__stats li {
  text-align: center;
  padding: 26px 12px;
  border-right: 1px solid rgba(198, 205, 218, 0.18);
}
.page-about .about-standard__stats li:last-child {
  border-right: none;
}
.page-about .about-standard__stat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 40px;
  font-weight: 800;
  line-height: 1;
  color: var(--c-gold);
}
.page-about .about-standard__stats li span:not(.about-standard__stat-num) {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--c-silver);
  margin-top: 6px;
}
.page-about .about-standard__stats li p {
  margin: 12px 0 0;
  font-size: 13px;
  color: var(--c-reading);
}

.page-about .about-ecosystem {
  background: linear-gradient(200deg, var(--c-ink) 0%, #10213F 90%, var(--c-cobalt) 150%);
  color: var(--c-reading);
}
.page-about .about-ecosystem .section-heading__title {
  color: var(--c-paper);
}
.page-about .about-eco__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
  margin-top: 36px;
  align-items: center;
}
.page-about .about-eco__figure {
  margin: 0;
}
.page-about .about-eco__figure img {
  width: 100%;
  height: auto;
  border-radius: var(--r-lg);
  border: 1px solid rgba(245, 178, 62, 0.2);
}
.page-about .about-eco__figure figcaption {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--c-silver);
  margin-top: 10px;
}
.page-about .about-eco__body > p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-reading);
  margin: 0 0 16px;
}
.page-about .about-eco__tags {
  list-style: none;
  padding: 0;
  margin: 24px 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.page-about .about-eco__tag {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--c-paper);
  border: 1px solid rgba(123, 92, 255, 0.45);
  background: rgba(123, 92, 255, 0.1);
  border-radius: 999px;
  padding: 8px 16px;
  cursor: default;
  transition: background var(--ease), color var(--ease), border-color var(--ease), transform var(--ease), box-shadow var(--ease);
}
.page-about .about-eco__tag:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.18);
}
.page-about .about-eco__tag--dis {
  border-color: rgba(245, 178, 62, 0.5);
  background: rgba(245, 178, 62, 0.1);
}
.page-about .about-eco__tag--dis:hover {
  background: var(--c-gold);
  color: var(--c-ink);
  border-color: var(--c-gold);
}
.page-about .about-eco__tag--dev {
  border-color: rgba(199, 205, 218, 0.4);
  background: rgba(199, 205, 218, 0.08);
}
.page-about .about-eco__tag--dev:hover {
  background: var(--c-silver);
  color: var(--c-ink);
  border-color: var(--c-silver);
}
.page-about .about-eco__tag--net {
  border-color: rgba(255, 110, 74, 0.45);
  background: rgba(255, 110, 74, 0.1);
}
.page-about .about-eco__tag--net:hover {
  background: var(--c-flame);
  color: var(--c-paper);
  border-color: var(--c-flame);
}
.page-about .about-eco__tag--copy {
  border-color: rgba(123, 92, 255, 0.5);
  background: rgba(123, 92, 255, 0.12);
}
.page-about .about-eco__tag--copy:hover {
  background: var(--c-violet);
  color: var(--c-paper);
  border-color: var(--c-violet);
}

.page-about .about-team {
  background: var(--c-paper);
  color: var(--c-char);
}
.page-about .about-team__lead {
  margin: 20px 0 40px;
  max-width: 720px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--c-char);
}
.page-about .about-team__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
}
.page-about .about-team__card {
  position: relative;
  background: #ffffff;
  border: 1px solid var(--c-silver);
  border-radius: var(--r-lg);
  padding: 28px;
  overflow: hidden;
  transition: box-shadow var(--ease), transform var(--ease);
}
.page-about .about-team__card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  pointer-events: none;
}
.page-about .about-team__card:hover {
  box-shadow: 0 12px 32px rgba(10, 20, 40, 0.1);
  transform: translateY(-4px);
}
.page-about .about-team__card--edit::before {
  background: var(--c-gold);
}
.page-about .about-team__card--front::before {
  background: var(--c-violet);
}
.page-about .about-team__card--design::before {
  background: var(--c-flame);
}
.page-about .about-team__card--support::before {
  background: var(--c-silver);
}
.page-about .about-team__count {
  display: block;
  font-family: var(--font-mono);
  font-size: 48px;
  font-weight: 800;
  line-height: 1;
  color: var(--c-ink);
  margin-bottom: 14px;
}
.page-about .about-team__count span {
  font-size: 16px;
  color: var(--c-char);
  margin-left: 4px;
}
.page-about .about-team__tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background: var(--c-ink);
  color: var(--c-gold);
  border-radius: 6px;
  padding: 5px 10px;
  margin-bottom: 16px;
}
.page-about .about-team__card h3 {
  margin: 0 0 10px;
  font-size: 20px;
  font-weight: 700;
  color: var(--c-ink);
}
.page-about .about-team__card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-char);
}
.page-about .about-team__footnote {
  margin: 56px 0 0;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.6;
  text-align: center;
  color: var(--c-silver);
  background: var(--c-ink);
  border-radius: var(--r-md);
  padding: 18px 24px;
}

.page-about .about-outro {
  background: var(--c-ink);
  border-top: 1px solid rgba(245, 178, 62, 0.3);
  text-align: center;
  padding: clamp(64px, 8vw, 120px) clamp(20px, 4vw, 64px);
}
.page-about .about-outro .container {
  max-width: 720px;
}
.page-about .about-outro__kicker {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-gold);
  margin: 0 0 14px;
}
.page-about .about-outro__title {
  font-size: clamp(28px, 4vw, 48px);
  font-weight: 800;
  color: var(--c-paper);
  margin: 0 0 36px;
  letter-spacing: -0.02em;
}
.page-about .about-outro__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
}
.page-about .about-outro .btn--ghost {
  border-color: var(--c-silver);
  color: var(--c-reading);
}
.page-about .about-outro .btn--ghost:hover {
  background: var(--c-reading);
  color: var(--c-ink);
  border-color: var(--c-reading);
}

@media (max-width: 720px) {
  .page-about .about-hero__deco {
    display: none;
  }
  .page-about .about-hero__statline {
    gap: 8px 20px;
  }
  .page-about .about-hero__stat b {
    font-size: 24px;
  }
}

@media (min-width: 640px) {
  .page-about .about-position__grid {
    grid-template-columns: 1.35fr 1fr;
  }
  .page-about .about-standard__grid {
    grid-template-columns: 1.2fr 1fr;
  }
  .page-about .about-team__grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .page-about .about-team__card:nth-child(even) {
    transform: translateY(28px);
  }
  .page-about .about-team__card:nth-child(odd) {
    transform: translateY(0);
  }
  .page-about .about-team__card:nth-child(even):hover {
    transform: translateY(22px);
  }
  .page-about .about-eco__grid {
    grid-template-columns: 1.1fr 1fr;
  }
  .page-about .about-milestone__year {
    justify-self: center;
  }
}

@media (max-width: 639px) {
  .page-about .about-milestone {
    grid-template-columns: 32px 16px minmax(0, 1fr);
    gap: 4px;
    padding: 24px 0;
  }
  .page-about .about-milestone__year {
    display: none;
  }
  .page-about .about-milestone__dot {
    margin-top: 10px;
  }
  .page-about .about-milestone__extra {
    max-height: none;
    opacity: 1;
    margin-top: 10px;
  }
  .page-about .about-standard__stats {
    grid-template-columns: 1fr;
    gap: 0;
  }
  .page-about .about-standard__stats li {
    border-right: none;
    border-bottom: 1px solid rgba(198, 205, 218, 0.14);
  }
  .page-about .about-standard__stats li:last-child {
    border-bottom: none;
  }
  .page-about .about-aside__inner {
    justify-content: flex-start;
  }
  .page-about .about-aside__foot {
    display: none;
  }
}

@media (min-width: 980px) {
  .page-about .about-layout {
    grid-template-columns: 220px minmax(0, 1fr);
    align-items: start;
  }
  .page-about .about-aside {
    position: sticky;
    top: var(--header-h);
    height: calc(100vh - var(--header-h));
    padding: 0;
    border-bottom: none;
    border-right: 1px solid rgba(245, 178, 62, 0.2);
    background: linear-gradient(180deg, var(--c-ink) 0%, var(--c-cobalt) 160%);
    overflow: visible;
  }
  .page-about .about-aside__inner {
    flex-direction: column;
    align-items: stretch;
    justify-content: center;
    gap: 4px;
    height: 100%;
    padding: 80px 16px 0;
    min-height: 0;
  }
  .page-about .about-aside__item {
    padding: 14px 18px;
    border-left: 2px solid rgba(198, 205, 218, 0.2);
    border-bottom: none;
    border-radius: 0;
    transition: border-color var(--ease), background var(--ease);
  }
  .page-about .about-aside__item:hover {
    border-left-color: var(--c-gold);
    border-bottom-color: transparent;
    background: rgba(245, 178, 62, 0.08);
  }
  .page-about .about-aside__num {
    font-size: 12px;
    min-width: 22px;
  }
  .page-about .about-aside__txt {
    font-size: 15px;
  }
  .page-about .about-aside__foot {
    display: block;
    position: absolute;
    left: 0;
    right: 0;
    bottom: 28px;
    text-align: center;
  }
  .page-about .about-aside__code {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--c-silver);
    writing-mode: vertical-rl;
    transform: rotate(180deg);
    letter-spacing: 0.16em;
  }
  .page-about .about-section {
    padding: clamp(72px, 8vw, 124px) clamp(32px, 5vw, 72px);
  }
  .page-about .about-section .container {
    max-width: 1020px;
  }
}

@media (min-width: 640px) and (max-width: 979px) {
  .page-about .about-aside__txt {
    font-size: 14px;
  }
  .page-about .about-aside__item {
    padding: 6px 4px;
  }
}