.page-about {
  --about-gap: clamp(20px, 3vw, 36px);
  --about-narrow: 760px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-top: clamp(28px, 5vw, 56px);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(28px, 4vw, 52px);
  margin-top: clamp(22px, 3.5vw, 40px);
}

.page-about .about-hero__title {
  margin: 10px 0 0;
  max-width: 20ch;
}

.page-about .about-hero__lead .bw-lead {
  margin-top: 18px;
  max-width: 62ch;
}

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

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

.page-about .about-crew__item {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-areas:
    "num role"
    "num desc";
  column-gap: 16px;
  align-items: center;
  padding: 18px 20px;
  border: 1px solid var(--bw-line);
  border-radius: var(--bw-radius);
  background: linear-gradient(150deg, rgba(14, 42, 32, 0.72), rgba(5, 20, 15, 0.9));
  box-shadow: var(--bw-shadow-float);
  transition: transform 220ms ease, border-color 220ms ease;
}

.page-about .about-crew__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 18px;
  bottom: 18px;
  width: 2px;
  border-radius: 2px;
  background: var(--bw-silver);
  opacity: 0.5;
}

.page-about .about-crew__item--cyan::before {
  background: var(--bw-cyan);
  box-shadow: 0 0 14px rgba(45, 245, 196, 0.7);
  opacity: 1;
}

.page-about .about-crew__item--signal::before {
  background: var(--bw-orange);
  box-shadow: 0 0 14px rgba(255, 122, 26, 0.65);
  opacity: 1;
}

.page-about .about-crew__num {
  grid-area: num;
  font-family: var(--bw-font-data);
  font-size: clamp(1.9rem, 4.2vw, 2.6rem);
  line-height: 1;
  color: var(--bw-white);
  letter-spacing: -0.02em;
}

.page-about .about-crew__role {
  grid-area: role;
  font-family: var(--bw-font-display);
  font-size: 1.0625rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--bw-cyan);
}

.page-about .about-crew__item--signal .about-crew__role {
  color: var(--bw-orange);
}

.page-about .about-crew__desc {
  grid-area: desc;
  margin-top: 4px;
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--bw-silver);
}

/* ---------- 团队工作方式 ---------- */
.page-about .about-split {
  align-items: start;
  gap: clamp(26px, 4vw, 60px);
}

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

.page-about .about-split__text .bw-h2 {
  margin-top: 10px;
}

.page-about .about-split__text .bw-text + .bw-text {
  margin-top: 14px;
}

.page-about .bw-h2 {
  margin: 0;
  font-family: var(--bw-font-display);
  font-size: clamp(1.7rem, 3.4vw, 2.6rem);
  line-height: 1.14;
  font-weight: 500;
  letter-spacing: 0.01em;
  color: var(--bw-white);
}

.page-about .bw-h3 {
  margin: 0;
  font-family: var(--bw-font-display);
  font-size: 1.15rem;
  letter-spacing: 0.04em;
  font-weight: 500;
  color: var(--bw-white);
}

/* ---------- 角色标签页 ---------- */
.page-about .about-roles {
  margin-top: 30px;
  border: 1px solid var(--bw-line);
  border-radius: var(--bw-radius);
  background: rgba(10, 14, 12, 0.6);
  overflow: hidden;
}

.page-about .about-roles__list {
  display: flex;
  flex-wrap: wrap;
  gap: 2px;
  padding: 6px;
  border-bottom: 1px solid var(--bw-line);
}

.page-about .about-roles__tab {
  flex: 1 1 120px;
  padding: 11px 14px;
  border: 0;
  border-radius: var(--bw-radius-pill);
  background: transparent;
  color: var(--bw-silver);
  font-family: var(--bw-font-display);
  font-size: 0.9375rem;
  letter-spacing: 0.08em;
  cursor: pointer;
  transition: background 200ms ease, color 200ms ease;
}

.page-about .about-roles__tab:hover {
  color: var(--bw-white);
  background: rgba(45, 245, 196, 0.08);
}

.page-about .about-roles__tab[aria-selected="true"] {
  background: var(--bw-cyan);
  color: #04120D;
  font-weight: 600;
}

.page-about .about-roles__tab:focus-visible {
  outline: 2px solid var(--bw-orange);
  outline-offset: 2px;
}

.page-about .about-roles__panel {
  padding: 20px 20px 24px;
}

.page-about .about-roles__panel .bw-text {
  margin: 0;
}

/* ---------- 校验流程 ---------- */
.page-about .about-head {
  max-width: 68ch;
}

.page-about .about-head__text {
  margin-top: 14px;
}

.page-about .about-flow {
  list-style: none;
  counter-reset: none;
  margin: clamp(30px, 4vw, 46px) 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-flow__step {
  position: relative;
  padding: 20px 22px 22px;
  border: 1px solid var(--bw-line);
  border-left: 3px solid var(--bw-cyan);
  border-radius: 0 var(--bw-radius) var(--bw-radius) 0;
  background: linear-gradient(120deg, rgba(14, 42, 32, 0.55), rgba(5, 20, 15, 0.35));
  transition: transform 220ms ease, border-left-color 220ms ease, background 220ms ease;
}

.page-about .about-flow__step:nth-child(2) {
  border-left-color: var(--bw-odds);
}

.page-about .about-flow__step:nth-child(3) {
  border-left-color: var(--bw-silver);
}

.page-about .about-flow__step:nth-child(4) {
  border-left-color: var(--bw-orange);
}

.page-about .about-flow__step:hover {
  transform: translateX(4px);
  background: linear-gradient(120deg, rgba(14, 42, 32, 0.8), rgba(5, 20, 15, 0.5));
}

.page-about .about-flow__idx {
  display: block;
  font-family: var(--bw-font-data);
  font-size: 0.8125rem;
  letter-spacing: 0.22em;
  color: var(--bw-cyan);
  margin-bottom: 8px;
}

.page-about .about-flow__step:nth-child(4) .about-flow__idx {
  color: var(--bw-orange);
}

.page-about .about-flow__text {
  margin: 8px 0 0;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--bw-silver);
}

.page-about .about-verify-note {
  display: grid;
  gap: 20px;
  margin-top: clamp(28px, 4vw, 44px);
}

.page-about .about-verify-note__media {
  margin: 0;
}

.page-about .about-verify-note__card {
  align-self: center;
  padding: 22px 24px;
}

.page-about .about-verify-note__text {
  margin: 10px 0 0;
  font-size: 0.9375rem;
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline-wrap {
  position: relative;
}

.page-about .about-timeline__bg {
  position: absolute;
  inset: 0;
  margin: 0;
  overflow: hidden;
  border-radius: var(--bw-radius);
  opacity: 0.16;
  pointer-events: none;
}

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

.page-about .about-head--onDark {
  position: relative;
}

.page-about .about-timeline {
  position: relative;
  margin-top: clamp(30px, 4.5vw, 52px);
  padding-left: 26px;
}

.page-about .about-timeline__axis {
  position: absolute;
  left: 4px;
  top: 6px;
  bottom: 6px;
  width: 4px;
  height: calc(100% - 12px);
  color: var(--bw-line);
}

.page-about .about-timeline__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(22px, 3vw, 34px);
}

.page-about .about-timeline__item {
  position: relative;
  display: grid;
  gap: 8px;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 10px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--bw-stand);
  border: 1px solid var(--bw-cyan);
}

.page-about .about-timeline__item--current::before {
  background: var(--bw-orange);
  border-color: var(--bw-orange);
  box-shadow: 0 0 0 5px rgba(255, 122, 26, 0.2);
}

.page-about .about-timeline__year {
  font-family: var(--bw-font-data);
  font-size: clamp(1.5rem, 3vw, 2rem);
  line-height: 1;
  color: var(--bw-cyan);
  letter-spacing: 0.04em;
}

.page-about .about-timeline__item--current .about-timeline__year {
  color: var(--bw-orange);
}

.page-about .about-timeline__body {
  padding: 18px 20px;
  border: 1px solid var(--bw-line);
  border-radius: var(--bw-radius);
  background: rgba(10, 14, 12, 0.82);
  box-shadow: var(--bw-shadow-float);
}

.page-about .about-timeline__body .bw-text {
  margin: 10px 0 0;
}

/* ---------- 协作网络 ---------- */
.page-about .about-partners {
  margin-top: clamp(28px, 4vw, 44px);
}

.page-about .about-partners__card {
  display: grid;
  gap: 6px;
  padding: 22px 22px 24px;
  transition: transform 220ms ease, border-color 220ms ease;
}

.page-about .about-partners__card:hover {
  transform: translateY(-4px);
  border-color: rgba(45, 245, 196, 0.45);
}

.page-about .about-partners__num {
  margin: 2px 0 4px;
  font-family: var(--bw-font-data);
  font-size: clamp(1.8rem, 3.6vw, 2.4rem);
  line-height: 1;
  color: var(--bw-white);
}

.page-about .about-partners__num span {
  font-size: 0.875rem;
  letter-spacing: 0.1em;
  color: var(--bw-silver);
  margin-left: 6px;
}

.page-about .about-partners__text {
  margin: 6px 0 0;
  font-size: 0.9375rem;
}

.page-about .about-partners__tail {
  margin-top: clamp(24px, 3vw, 34px);
  max-width: 68ch;
}

/* ---------- 荣誉 ---------- */
.page-about .about-honors {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
}

.page-about .about-honors__intro .bw-text {
  margin-top: 14px;
  max-width: 60ch;
}

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

.page-about .about-honors__item {
  display: grid;
  gap: 6px;
  padding: 20px 22px;
  border: 1px solid var(--bw-line);
  border-radius: var(--bw-radius);
  background: rgba(14, 42, 32, 0.4);
}

.page-about .about-honors__item--metric {
  background: linear-gradient(130deg, rgba(45, 245, 196, 0.1), rgba(5, 20, 15, 0.5));
}

.page-about .about-honors__tag {
  justify-self: start;
  font-family: var(--bw-font-data);
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  color: var(--bw-silver);
  border: 1px solid var(--bw-line);
  border-radius: var(--bw-radius-pill);
  padding: 3px 10px;
}

.page-about .about-honors__tag--cyan {
  color: var(--bw-cyan);
  border-color: rgba(45, 245, 196, 0.45);
}

.page-about .about-honors__tag--signal {
  color: var(--bw-orange);
  border-color: rgba(255, 122, 26, 0.45);
}

.page-about .about-honors__metric {
  margin: 2px 0 0;
  font-family: var(--bw-font-data);
  font-size: clamp(1.6rem, 3.2vw, 2.1rem);
  line-height: 1;
  color: var(--bw-white);
}

.page-about .about-honors__metric span {
  font-size: 0.9375rem;
  margin-left: 6px;
  color: var(--bw-silver);
}

.page-about .about-honors__text {
  margin: 4px 0 0;
  font-size: 0.9375rem;
}

/* ---------- 联系 ---------- */
.page-about .about-reach {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
  align-items: start;
}

.page-about .about-reach__text .bw-text {
  margin-top: 14px;
  max-width: 58ch;
}

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

.page-about .about-reach__card {
  padding: 24px;
}

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

.page-about .about-reach__contact li {
  display: grid;
  gap: 4px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--bw-line);
}

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

.page-about .about-reach__key {
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  color: var(--bw-silver);
}

.page-about .about-reach__val {
  color: var(--bw-white);
  font-size: 0.9375rem;
}

.page-about .about-reach__card .bw-note {
  margin-top: 16px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    align-items: end;
  }

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

  .page-about .about-verify-note {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    align-items: center;
  }

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

  .page-about .about-honors {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    align-items: start;
  }
}

@media (min-width: 1024px) {
  .page-about .bw-grid--split {
    display: grid;
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr);
  }

  .page-about .about-split__text {
    padding-right: 8px;
  }

  .page-about .about-flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 12px;
  }

  .page-about .about-flow__step {
    border-radius: var(--bw-radius);
    border-left-width: 1px;
    border-top: 3px solid var(--bw-cyan);
  }

  .page-about .about-flow__step:nth-child(2) {
    border-top-color: var(--bw-odds);
  }

  .page-about .about-flow__step:nth-child(3) {
    border-top-color: var(--bw-silver);
  }

  .page-about .about-flow__step:nth-child(4) {
    border-top-color: var(--bw-orange);
  }

  .page-about .about-flow__step:hover {
    transform: translateY(-5px);
  }

  .page-about .about-timeline {
    padding-left: 74px;
  }

  .page-about .about-timeline__axis {
    left: 28px;
    width: 4px;
  }

  .page-about .about-timeline__item {
    grid-template-columns: 150px minmax(0, 1fr);
    align-items: start;
    column-gap: 26px;
  }

  .page-about .about-timeline__item::before {
    left: -52px;
    top: 12px;
  }

  .page-about .about-timeline__item:nth-child(even) .about-timeline__body {
    margin-left: 18px;
  }

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

  .page-about .about-reach {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-flow__step,
  .page-about .about-partners__card,
  .page-about .about-crew__item {
    transition: none;
  }

  .page-about .about-flow__step:hover,
  .page-about .about-partners__card:hover {
    transform: none;
  }
}