.page-about {
  --about-green-deep: #0B6B44;
  --about-orange-deep: #C24A12;
  --about-grad-ink: linear-gradient(155deg, #060D24 0%, #0C1740 48%, #16357F 100%);
  --about-shadow: 0 16px 34px rgba(6, 13, 36, .12);
}

/* ---------- 首屏拼贴 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: calc(var(--bar-h) + 40px) 0 52px;
  background-image: var(--about-grad-ink);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(120, 160, 255, .10) 1px, transparent 1px),
    linear-gradient(90deg, rgba(120, 160, 255, .10) 1px, transparent 1px);
  background-size: 54px 54px;
  -webkit-mask-image: radial-gradient(120% 92% at 12% 0%, #000 0%, transparent 72%);
  mask-image: radial-gradient(120% 92% at 12% 0%, #000 0%, transparent 72%);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  top: -110px;
  right: -110px;
  width: 380px;
  height: 380px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(47, 224, 140, .26), transparent 68%);
  pointer-events: none;
}

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

.page-about .about-hero .crumbs {
  color: rgba(217, 226, 242, .72);
  font-size: 13px;
}

.page-about .about-hero .crumbs a {
  color: var(--mint);
  text-decoration: none;
}

.page-about .about-hero .crumbs a:hover,
.page-about .about-hero .crumbs a:focus-visible {
  color: var(--green);
  text-decoration: underline;
}

.page-about .about-hero__mosaic {
  display: grid;
  gap: 16px;
  margin-top: 26px;
}

.page-about .about-hero__lead h1 {
  margin: 12px 0 0;
  font-family: var(--font-head);
  font-size: clamp(30px, 7.4vw, 56px);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--white);
  text-wrap: balance;
}

.page-about .about-hero__lead .lede {
  margin: 18px 0 0;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.78;
  color: var(--on-dark);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-about .about-hero__stats {
  padding: 20px 22px;
  border-radius: var(--r-lg);
  border: 1px solid var(--line-dark);
  background: linear-gradient(160deg, rgba(12, 23, 64, .92), rgba(22, 53, 127, .55));
}

.page-about .about-hero__stats-head {
  margin: 0 0 16px;
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: .1em;
  color: var(--cyan);
}

.page-about .about-hero__stats .stat-row {
  display: grid;
  gap: 12px;
}

.page-about .about-hero__stats .stat {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 8px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-dark);
}

.page-about .about-hero__stats .stat:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-about .about-hero__stats .stat__value {
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  color: var(--green);
  font-variant-numeric: tabular-nums;
}

.page-about .about-hero__stats .stat__unit {
  font-size: 13px;
  color: var(--mint);
}

.page-about .about-hero__stats .stat__label {
  flex: 1 0 100%;
  font-size: 13px;
  line-height: 1.6;
  color: rgba(217, 226, 242, .78);
}

.page-about .about-hero__note {
  padding: 16px 18px;
  border-radius: var(--r-lg);
  border: 1px solid var(--line-green);
  border-left: 3px solid var(--green);
  background: rgba(12, 23, 64, .7);
}

.page-about .about-hero__note p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--on-dark);
}

/* ---------- 主体骨架 ---------- */
.page-about .about-main {
  padding: 48px 0 56px;
}

.page-about .about-layout {
  display: grid;
  gap: 28px;
}

.page-about .about-index__head {
  margin: 0 0 10px;
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: .1em;
  color: var(--slate);
}

.page-about .about-index__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 8px;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-about .about-index__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: var(--r-pill);
  border: 1px solid var(--line-light);
  background: var(--white);
  color: var(--on-light);
  font-size: 13.5px;
  font-weight: 600;
  white-space: nowrap;
  text-decoration: none;
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease),
    border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .about-index__num {
  font-size: 11px;
  color: var(--slate);
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  color: var(--about-green-deep);
  background: var(--mint);
  border-color: var(--line-green);
  transform: translateX(2px);
}

.page-about .about-chapter {
  scroll-margin-top: calc(var(--bar-h) + 20px);
}

.page-about .about-chapter + .about-chapter {
  margin-top: 56px;
}

.page-about .about-chapter .section__title {
  color: var(--ink);
}

.page-about .about-chapter .section__sub {
  max-width: 42em;
  color: var(--slate);
}

.page-about .eyebrow--on-dark {
  color: var(--green);
}

/* ---------- 01 团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: 24px;
  margin-top: 26px;
}

.page-about .about-team__grid {
  display: grid;
  gap: 14px;
}

.page-about .team-card {
  padding: 18px;
  border-radius: var(--r-lg);
  border: 1px solid var(--line-light);
  background: var(--white);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease),
    border-color var(--dur) var(--ease);
}

.page-about .team-card:hover,
.page-about .team-card:focus-within {
  transform: translateY(-4px);
  border-color: var(--line-green);
  box-shadow: var(--about-shadow);
}

.page-about .team-card__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.page-about .team-card__name {
  margin: 0;
  font-size: 17px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-about .team-card__count {
  flex: none;
  padding: 3px 10px;
  border-radius: var(--r-pill);
  font-size: 12.5px;
  font-weight: 600;
  color: var(--ink);
  background: var(--mint);
}

.page-about .team-card:nth-child(2) .team-card__count {
  background: rgba(56, 216, 232, .30);
}

.page-about .team-card:nth-child(3) .team-card__count {
  background: rgba(255, 180, 58, .36);
}

.page-about .team-card:nth-child(4) .team-card__count {
  background: rgba(255, 122, 47, .28);
}

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

.page-about .about-team__media {
  position: relative;
  margin: 0;
  border-radius: var(--r-xl);
  overflow: hidden;
  background: var(--ink-2);
}

.page-about .about-team__media img {
  display: block;
  width: 100%;
  height: 100%;
  aspect-ratio: 10 / 7;
  object-fit: cover;
}

.page-about .about-team__media .media__caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 12px 16px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--on-dark);
  background: linear-gradient(to top, rgba(6, 13, 36, .88), rgba(6, 13, 36, 0));
}

/* ---------- 02 流程 ---------- */
.page-about .about-flow__list {
  position: relative;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-flow__list::before {
  content: "";
  position: absolute;
  left: 21px;
  top: 42px;
  bottom: 42px;
  width: 2px;
  background: linear-gradient(to bottom, rgba(47, 224, 140, .55), rgba(56, 216, 232, .35), rgba(47, 224, 140, .12));
}

.page-about .about-flow__step {
  position: relative;
  padding: 16px 16px 16px 64px;
  border-radius: var(--r-md);
  transition: background-color var(--dur) var(--ease);
}

.page-about .about-flow__step + .about-flow__step {
  margin-top: 4px;
}

.page-about .about-flow__step:hover,
.page-about .about-flow__step:focus-within {
  background: rgba(22, 53, 127, .05);
}

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

.page-about .about-flow__num {
  position: absolute;
  left: 0;
  top: 14px;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: var(--r-pill);
  border: 2px solid rgba(47, 224, 140, .42);
  background: var(--ink);
  color: var(--green);
  font-size: 14px;
  font-weight: 700;
  transition: transform var(--dur) var(--ease), background-color var(--dur) var(--ease),
    color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-flow__step:hover .about-flow__num,
.page-about .about-flow__step:focus-within .about-flow__num {
  transform: scale(1.06);
  background: var(--green);
  border-color: var(--green);
  color: var(--ink);
}

.page-about .about-flow__step--review .about-flow__num {
  border-color: rgba(255, 122, 47, .55);
  color: var(--orange);
}

.page-about .about-flow__flag {
  display: inline-block;
  margin-bottom: 6px;
  padding: 2px 9px;
  border-radius: var(--r-pill);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: .04em;
  color: var(--about-orange-deep);
  background: rgba(255, 122, 47, .14);
}

.page-about .about-flow__title {
  margin: 0;
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-about .about-flow__desc {
  margin: 8px 0 0;
  max-width: 40em;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--slate);
}

.page-about .about-flow__more {
  margin: 10px 0 0;
  max-width: 40em;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--blue);
}

.page-about .about-flow__media {
  margin: 30px 0 0;
  border-radius: var(--r-xl);
  overflow: hidden;
  background: var(--ink-2);
}

.page-about .about-flow__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .about-flow__media .media__caption {
  padding: 12px 16px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--on-dark);
  background: var(--ink-2);
}

/* ---------- 03 赛季节奏 ---------- */
.page-about .rhythm-panel {
  position: relative;
  overflow: hidden;
  padding: 26px 20px 28px;
  border-radius: var(--r-xl);
  background-image: var(--about-grad-ink);
}

.page-about .rhythm-panel::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(120, 160, 255, .08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(120, 160, 255, .08) 1px, transparent 1px);
  background-size: 42px 42px;
  pointer-events: none;
}

.page-about .rhythm-panel > * {
  position: relative;
  z-index: 1;
}

.page-about .rhythm-panel .section__title {
  color: var(--white);
}

.page-about .rhythm-panel .section__sub {
  color: var(--on-dark);
}

.page-about .rhythm-list {
  display: grid;
  gap: 12px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .rhythm-item {
  padding: 14px 16px;
  border-radius: var(--r-md);
  border: 1px solid var(--line-dark);
  background: rgba(12, 23, 64, .74);
}

.page-about .rhythm-item__key {
  display: block;
  margin-bottom: 6px;
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: .05em;
  color: var(--green);
}

.page-about .rhythm-item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--on-dark);
}

.page-about .version-track {
  position: relative;
  margin-top: 26px;
  padding-top: 4px;
}

.page-about .version-track__head {
  margin: 0 0 16px;
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: .1em;
  color: var(--cyan);
}

.page-about .version-track__rail {
  display: none;
}

.page-about .version-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .version-item {
  display: grid;
  justify-items: start;
  gap: 6px;
}

.page-about .version-item__dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(56, 216, 232, .16);
}

.page-about .version-item--now .version-item__dot {
  background: var(--green);
  box-shadow: 0 0 0 4px rgba(47, 224, 140, .22);
}

.page-about .version-item__tag {
  font-size: 12.5px;
  font-weight: 700;
  color: var(--mint);
}

.page-about .version-item--now .version-item__tag {
  color: var(--green);
}

.page-about .version-item p {
  margin: 0;
  font-size: 13px;
  line-height: 1.65;
  color: var(--on-dark);
}

/* ---------- 04 协作生态 ---------- */
.page-about .about-network {
  display: grid;
  gap: 24px;
  margin-top: 26px;
}

.page-about .about-network__media {
  margin: 0;
  border-radius: var(--r-xl);
  overflow: hidden;
  background: var(--ink-2);
}

.page-about .about-network__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .about-network__media .media__caption {
  padding: 12px 16px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--on-dark);
  background: var(--ink-2);
}

.page-about .partner-list {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .partner-item {
  padding: 0 0 14px 16px;
  border-left: 2px solid rgba(47, 224, 140, .38);
  border-bottom: 1px solid var(--line-light);
}

.page-about .partner-list li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-about .partner-item__title {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 800;
  color: var(--ink);
}

.page-about .partner-item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--slate);
}

.page-about .about-network__note {
  margin: 18px 0 0;
  padding: 12px 16px;
  border-radius: var(--r-md);
  background: rgba(47, 224, 140, .10);
  font-size: 14px;
  line-height: 1.7;
  color: var(--on-light);
}

.page-about .about-network__note a {
  color: var(--about-green-deep);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 3px;
}

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

/* ---------- 05 长期做法 ---------- */
.page-about .about-practice {
  display: grid;
  gap: 26px;
  margin-top: 4px;
}

.page-about .about-practice__head .btn {
  margin-top: 18px;
}

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

.page-about .practice-item {
  display: grid;
  grid-template-columns: 46px 1fr;
  gap: 12px;
  padding: 18px 0;
  border-top: 1px solid var(--line-light);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

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

.page-about .practice-item:hover,
.page-about .practice-item:focus-within {
  border-top-color: var(--line-green);
  transform: translateX(3px);
}

.page-about .practice-item__idx {
  padding-top: 2px;
  font-size: 15px;
  font-weight: 700;
  color: var(--green);
  -webkit-text-stroke: .4px var(--about-green-deep);
}

.page-about .practice-item__title {
  margin: 0;
  font-size: 17px;
  font-weight: 800;
  color: var(--ink);
}

.page-about .practice-item p {
  margin: 8px 0 0;
  max-width: 40em;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--slate);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  padding: 44px 0 52px;
  background-image: linear-gradient(120deg, #060D24 0%, #0C1740 62%, #16357F 100%);
}

.page-about .about-cta__inner {
  display: grid;
  gap: 22px;
}

.page-about .about-cta__title {
  margin: 10px 0 0;
  font-family: var(--font-head);
  font-size: clamp(24px, 5vw, 36px);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--white);
}

.page-about .about-cta__sub {
  margin: 12px 0 0;
  max-width: 32em;
  font-size: 15px;
  line-height: 1.75;
  color: var(--on-dark);
}

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

/* ---------- 响应式与交互增强 ---------- */
@media (min-width: 620px) {
  .page-about .about-hero {
    padding: calc(var(--bar-h) + 52px) 0 64px;
  }

  .page-about .about-team__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .team-card:nth-child(2),
  .page-about .team-card:nth-child(4) {
    margin-top: 28px;
  }

  .page-about .about-flow__list::before {
    left: 23px;
  }

  .page-about .about-flow__step {
    padding: 18px 18px 18px 72px;
  }

  .page-about .about-flow__num {
    width: 48px;
    height: 48px;
  }

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

@media (min-width: 900px) {
  .page-about .about-hero__mosaic {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: 20px;
    align-items: start;
  }

  .page-about .about-hero__lead {
    grid-column: 1 / 8;
    grid-row: 1 / 3;
  }

  .page-about .about-hero__stats {
    grid-column: 8 / 13;
    grid-row: 1 / 2;
  }

  .page-about .about-hero__note {
    grid-column: 8 / 13;
    grid-row: 2 / 3;
  }

  .page-about .about-main {
    padding: 64px 0 76px;
  }

  .page-about .about-team {
    grid-template-columns: 1.18fr .82fr;
    gap: 32px;
    align-items: start;
  }

  .page-about .about-flow__media,
  .page-about .about-network__media {
    border-radius: var(--r-xl);
  }

  .page-about .about-network {
    grid-template-columns: .92fr 1.08fr;
    gap: 40px;
    align-items: center;
  }

  .page-about .about-practice {
    grid-template-columns: .82fr 1.18fr;
    gap: 48px;
    margin-top: 26px;
  }

  .page-about .about-cta {
    padding: 56px 0 64px;
  }

  .page-about .about-cta__inner {
    grid-template-columns: 1.4fr auto;
    align-items: end;
    gap: 32px;
  }

  .page-about .about-cta__actions {
    justify-content: flex-end;
  }

  .page-about .version-track {
    padding-top: 10px;
  }

  .page-about .version-track__rail {
    display: block;
    position: absolute;
    top: 48px;
    left: 12.5%;
    right: 12.5%;
    height: 4px;
  }

  .page-about .version-track__rail svg {
    display: block;
    width: 100%;
    height: 4px;
  }

  .page-about .version-list {
    gap: 20px;
  }

  .page-about .version-item {
    justify-items: center;
    text-align: center;
  }

  .page-about .about-chapter + .about-chapter {
    margin-top: 72px;
  }
}

@media (min-width: 1024px) {
  .page-about .about-layout {
    grid-template-columns: 216px minmax(0, 1fr);
    gap: 52px;
    align-items: start;
  }

  .page-about .about-index {
    position: sticky;
    top: calc(var(--bar-h) + 20px);
  }

  .page-about .about-index__list {
    display: grid;
    gap: 4px;
    padding-bottom: 0;
    overflow: visible;
  }

  .page-about .about-index__link {
    padding: 9px 14px;
    border-radius: var(--r-sm);
    border-color: transparent;
    background: transparent;
    font-size: 14px;
    justify-content: flex-start;
  }

  .page-about .about-index__link:hover,
  .page-about .about-index__link:focus-visible {
    transform: translateX(4px);
  }

  .page-about .about-chapter:target {
    outline: none;
  }

  .page-about .about-chapter:target .about-index__head {
    color: var(--about-green-deep);
  }
}

@media (min-width: 900px) and (hover: hover) {
  .page-about .about-flow__more {
    display: grid;
    grid-template-rows: 0fr;
    margin-top: 0;
    opacity: 0;
    transition: grid-template-rows var(--dur) var(--ease), opacity var(--dur) var(--ease),
      margin-top var(--dur) var(--ease);
  }

  .page-about .about-flow__more > span {
    overflow: hidden;
  }

  .page-about .about-flow__step:hover .about-flow__more,
  .page-about .about-flow__step:focus-within .about-flow__more {
    grid-template-rows: 1fr;
    margin-top: 10px;
    opacity: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .team-card,
  .page-about .about-flow__num,
  .page-about .practice-item,
  .page-about .about-index__link,
  .page-about .about-flow__more {
    transition-duration: 1ms;
  }

  .page-about .team-card:hover,
  .page-about .team-card:focus-within,
  .page-about .about-flow__step:hover .about-flow__num,
  .page-about .about-flow__step:focus-within .about-flow__num,
  .page-about .practice-item:hover,
  .page-about .practice-item:focus-within,
  .page-about .about-index__link:hover,
  .page-about .about-index__link:focus-visible {
    transform: none;
  }
}