.page-about {
  --about-muted-dark: #5B6376;
  --about-line-light: rgba(18, 23, 42, .14);
  --about-line-dark: rgba(138, 147, 163, .22);
}

/* ---------- Hero ---------- */
.page-about .about-hero {
  padding-top: clamp(20px, 4vw, 40px);
}

.page-about .about-hero__grid {
  display: grid;
  gap: 34px;
  margin-top: clamp(22px, 4vw, 40px);
}

.page-about .about-hero__lead .lede {
  margin-top: 18px;
  max-width: 46ch;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .about-stat {
  background: var(--ink-2);
  padding: 16px 16px 18px;
}

.page-about .about-stat dt {
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--stone);
}

.page-about .about-stat dd {
  margin: 8px 0 0;
  font-size: clamp(22px, 5vw, 28px);
  font-weight: 600;
  color: var(--cyan);
  letter-spacing: -.01em;
}

/* ---------- 章节标题 ---------- */
.page-about .about-sec__head {
  max-width: 62ch;
  margin-bottom: clamp(26px, 4vw, 44px);
}

.page-about .about-sec__head .lede {
  margin-top: 16px;
}

/* ---------- 起点与定位 ---------- */
.page-about .about-origin__grid {
  display: grid;
  gap: 32px;
}

.page-about .about-origin__grid .prose p + p {
  margin-top: 1.1em;
}

.page-about .about-origin__aside {
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-about .about-fact {
  border: 1px solid var(--line);
  border-left: 3px solid var(--violet);
  border-radius: var(--r-sm);
  background: rgba(11, 18, 51, .55);
  padding: 18px 20px 20px;
}

.page-about .about-fact__k {
  margin: 0;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--stone);
}

.page-about .about-fact__v {
  margin: 8px 0 6px;
  font-size: clamp(26px, 6vw, 34px);
  font-weight: 600;
  color: var(--bone);
  letter-spacing: -.01em;
}

.page-about .about-fact__d {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--stone);
}

/* ---------- 版本时间线 ---------- */
.page-about .about-timeline__media {
  margin: 0 0 clamp(30px, 5vw, 52px);
}

.page-about .about-timeline__media img {
  width: 100%;
  height: auto;
  aspect-ratio: 7 / 4;
  object-fit: cover;
  border-radius: var(--r-lg);
  display: block;
}

.page-about .about-timeline__grid {
  display: grid;
  gap: 30px;
}

.page-about .about-scale__list {
  list-style: none;
  margin: 0;
  padding: 0 0 0 22px;
  position: relative;
  display: flex;
  gap: 6px;
}

.page-about .about-scale__list::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: var(--about-line-light);
}

.page-about .about-scale__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 8px 0;
  text-decoration: none;
  position: relative;
  color: var(--text-dark);
  transition: color var(--dur) var(--ease);
}

.page-about .about-scale__link::before {
  content: "";
  position: absolute;
  left: -22px;
  top: 50%;
  transform: translateY(-50%);
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--bone);
  border: 1px solid var(--stone);
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .about-scale__link:hover::before,
.page-about .about-scale__link:focus-visible::before {
  background: var(--violet);
  border-color: var(--violet);
  box-shadow: 0 0 0 5px rgba(108, 60, 233, .18);
}

.page-about .about-scale__link:focus-visible {
  outline: 2px solid var(--violet);
  outline-offset: 4px;
}

.page-about .about-scale__year {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -.01em;
}

.page-about .about-scale__label {
  font-size: 13px;
  color: var(--about-muted-dark);
}

.page-about .about-timeline__items {
  display: grid;
  gap: 0;
}

.page-about .about-tl {
  border-top: 1px solid var(--about-line-light);
  padding: 22px 0 26px;
  scroll-margin-top: 96px;
}

.page-about .about-tl:last-child {
  border-bottom: 1px solid var(--about-line-light);
}

.page-about .about-tl__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  flex-wrap: wrap;
}

.page-about .about-tl__year {
  font-size: 13px;
  letter-spacing: .14em;
  color: var(--violet-deep);
  padding: 3px 9px;
  border: 1px solid rgba(108, 60, 233, .34);
  border-radius: 999px;
}

.page-about .about-tl__title {
  margin: 0;
  font-size: clamp(19px, 3vw, 23px);
  font-weight: 700;
  color: var(--text-dark);
  letter-spacing: -.01em;
}

.page-about .about-tl > p {
  margin: 12px 0 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--about-muted-dark);
  max-width: 62ch;
}

/* ---------- 团队 ---------- */
.page-about .about-team__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-team__item {
  position: relative;
  background: var(--ink-2);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: 20px 20px 22px;
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .about-team__item:hover,
.page-about .about-team__item:focus-within {
  border-color: rgba(34, 224, 214, .5);
  transform: translateY(-2px);
}

.page-about .about-team__item:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.page-about .about-team__num {
  margin: 0;
  font-size: 40px;
  line-height: 1;
  font-weight: 700;
  color: var(--violet);
  letter-spacing: -.02em;
}

.page-about .about-team__name {
  margin: 14px 0 0;
  font-size: 18px;
  font-weight: 700;
  color: var(--bone);
}

.page-about .about-team__role {
  margin: 8px 0 0;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--cyan);
}

.page-about .about-team__tip {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--stone);
}

/* ---------- 内容生产 ---------- */
.page-about .about-flow__grid {
  display: grid;
  gap: 32px;
}

.page-about .about-flow__steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  counter-reset: none;
}

.page-about .about-flow__step {
  border-top: 1px solid var(--about-line-dark);
  padding: 20px 0 22px;
  position: relative;
  padding-left: 58px;
}

.page-about .about-flow__step:last-child {
  border-bottom: 1px solid var(--about-line-dark);
}

.page-about .about-flow__num {
  position: absolute;
  left: 0;
  top: 22px;
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--cyan);
}

.page-about .about-flow__st {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  color: var(--bone);
}

.page-about .about-flow__step p {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.82;
  color: var(--stone);
}

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

.page-about .about-flow__media img {
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-radius: var(--r-lg);
  display: block;
}

.page-about .about-output {
  margin-top: clamp(32px, 5vw, 52px);
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .about-output__item {
  background: var(--ink);
  padding: 20px 22px;
  display: flex;
  align-items: baseline;
  gap: 14px;
}

.page-about .about-output__n {
  margin: 0;
  font-size: 30px;
  font-weight: 700;
  color: var(--orange);
  letter-spacing: -.02em;
}

.page-about .about-output__t {
  margin: 0;
  font-size: 15px;
  color: var(--stone);
}

/* ---------- 合作生态 ---------- */
.page-about .about-eco__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .about-eco__item {
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: 22px 22px 24px;
  background: linear-gradient(150deg, rgba(108, 60, 233, .16), rgba(11, 18, 51, 0) 62%);
}

.page-about .about-eco__n {
  margin: 0;
  font-size: 38px;
  line-height: 1;
  font-weight: 700;
  color: var(--cyan);
  letter-spacing: -.02em;
}

.page-about .about-eco__t {
  margin: 12px 0 0;
  font-size: 17px;
  font-weight: 700;
  color: var(--bone);
}

.page-about .about-eco__item p:last-child {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--stone);
}

.page-about .about-eco__pack {
  margin-top: clamp(28px, 4vw, 44px);
  border: 1px solid rgba(34, 224, 214, .32);
  border-radius: var(--r-lg);
  padding: clamp(22px, 4vw, 34px);
  display: grid;
  gap: 24px;
  background: var(--ink-2);
}

.page-about .about-eco__pack-text h3 {
  margin: 12px 0 0;
  font-size: clamp(19px, 3vw, 24px);
  font-weight: 700;
  color: var(--bone);
  letter-spacing: -.01em;
}

.page-about .about-eco__pack-text p:last-child {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.82;
  color: var(--stone);
  max-width: 60ch;
}

.page-about .about-eco__pack .btn {
  justify-self: start;
}

/* ---------- 资质与荣誉 ---------- */
.page-about .about-honor__grid {
  display: grid;
  gap: 30px;
}

.page-about .about-honor__facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-about .about-honor__fact {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  align-items: baseline;
  gap: 16px;
  border-top: 1px solid var(--about-line-light);
  padding: 20px 0;
}

.page-about .about-honor__fact:last-child {
  border-bottom: 1px solid var(--about-line-light);
}

.page-about .about-honor__n,
.page-about .about-honor__mark {
  font-size: 26px;
  font-weight: 700;
  color: var(--clay);
  letter-spacing: -.01em;
}

.page-about .about-honor__mark {
  font-size: 15px;
  letter-spacing: .02em;
}

.page-about .about-honor__d {
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--about-muted-dark);
}

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

.page-about .about-honor__media img {
  width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
  border-radius: var(--r-lg);
  display: block;
}

/* ---------- CTA ---------- */
.page-about .about-cta p {
  margin: 16px 0 0;
  max-width: 62ch;
  color: rgba(244, 241, 234, .84);
  line-height: 1.8;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-team__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

  .page-about .about-output__item {
    flex-direction: column;
    gap: 8px;
  }

  .page-about .about-scale__list {
    flex-direction: column;
    gap: 0;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, .6fr);
    gap: 56px;
    align-items: end;
  }

  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, .5fr);
    gap: 56px;
  }

  .page-about .about-flow__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, .82fr);
    gap: 48px;
    align-items: start;
  }

  .page-about .about-honor__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    gap: 48px;
    align-items: center;
  }

  .page-about .about-eco__pack {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
  }
}

@media (min-width: 980px) {
  .page-about .about-timeline__grid {
    grid-template-columns: 172px minmax(0, 1fr);
    gap: 52px;
  }

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

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

@media (min-width: 1200px) {
  .page-about .about-origin__grid {
    gap: 72px;
  }
}

/* 精细指针设备：团队职责说明默认收起，悬停或聚焦时展开 */
@media (hover: hover) and (pointer: fine) {
  .page-about .about-team__tip {
    max-height: 0;
    margin-top: 0;
    opacity: 0;
    overflow: hidden;
    transition: max-height .24s var(--ease), opacity .18s linear, margin-top .24s var(--ease);
  }

  .page-about .about-team__item:hover .about-team__tip,
  .page-about .about-team__item:focus-within .about-team__tip {
    max-height: 260px;
    margin-top: 12px;
    opacity: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
  }
}