.page-about {
  --about-band: clamp(60px, 9vw, 116px);
  --about-line-soft: rgba(30, 42, 64, 0.9);
  --about-cyan-soft: rgba(44, 232, 224, 0.14);
  --about-magenta-soft: rgba(255, 62, 142, 0.14);
}

/* ---------- 面包屑留白 ---------- */
.page-about .breadcrumb {
  padding-top: 20px;
}

.page-about .breadcrumb .slash-divider {
  margin: 0 8px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: 36px 0 var(--about-band);
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 40px;
  align-items: end;
}

.page-about .about-hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--ink-dim);
  text-transform: uppercase;
  margin: 0;
}

.page-about .about-hero__eyebrow .pulse-dot {
  margin: 0;
}

.page-about .about-hero__title {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(30px, 5.6vw, 52px);
  line-height: 1.24;
  letter-spacing: 0.01em;
  color: var(--ink);
  margin: 16px 0 0;
}

.page-about .about-hero__lede {
  max-width: 40em;
  margin: 22px 0 0;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: var(--ink-dim);
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin: 0;
}

.page-about .about-fact {
  background: var(--panel);
  border-left: 2px solid var(--cyan);
  padding: 16px 14px 18px;
}

.page-about .about-fact:nth-child(2) {
  border-left-color: var(--magenta);
}

.page-about .about-fact:nth-child(3) {
  border-left-color: var(--yellow);
}

.page-about .about-fact__label {
  font-size: 12px;
  line-height: 1.5;
  color: var(--ink-dim);
  margin: 0 0 10px;
}

.page-about .about-fact__value {
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.6vw, 38px);
  font-weight: 700;
  line-height: 1;
  color: var(--ink);
  margin: 0;
}

.page-about .about-fact__value small {
  font-size: 0.36em;
  font-weight: 500;
  margin-left: 4px;
  color: var(--ink-dim);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  padding: var(--about-band) 0;
}

.page-about .about-timeline__banner {
  margin: 0 0 48px;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--panel);
}

.page-about .about-timeline__banner img {
  display: block;
  width: 100%;
  height: clamp(160px, 30vw, 340px);
  object-fit: cover;
  opacity: 0.68;
}

.page-about .about-tl {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 4px 0 4px 36px;
  border-left: 1px solid var(--line);
}

.page-about .about-tl__item {
  position: relative;
  padding-bottom: 38px;
}

.page-about .about-tl__item:last-child {
  padding-bottom: 0;
}

.page-about .about-tl__item::before {
  content: "";
  position: absolute;
  left: -36px;
  top: 7px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px var(--about-cyan-soft);
  transform: translateX(-50%);
}

.page-about .about-tl__item:nth-child(5)::before {
  background: var(--yellow);
  box-shadow: 0 0 0 4px rgba(233, 255, 87, 0.16);
}

.page-about .about-tl__ver {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--cyan);
  border: 1px solid rgba(44, 232, 224, 0.42);
  padding: 2px 9px;
}

.page-about .about-tl__item:nth-child(5) .about-tl__ver {
  color: var(--yellow);
  border-color: rgba(233, 255, 87, 0.42);
}

.page-about .about-tl__title {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 19px;
  line-height: 1.5;
  color: var(--ink);
  margin: 12px 0 0;
}

.page-about .about-tl__body {
  max-width: 62ch;
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.9;
  color: var(--ink-dim);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  padding: var(--about-band) 0;
  border-top: 1px solid var(--line);
}

.page-about .about-team__chart {
  margin: 4px 0 36px;
}

.page-about .about-team__chart svg {
  display: block;
  width: 100%;
  height: 10px;
}

.page-about .about-team__legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.page-about .about-team__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
}

.page-about .about-role {
  background: var(--panel);
  border: 1px solid var(--line);
  border-top: 2px solid var(--cyan);
  padding: 22px 20px 24px;
}

.page-about .about-role--magenta {
  border-top-color: var(--magenta);
}

.page-about .about-role--yellow {
  border-top-color: var(--yellow);
}

.page-about .about-role__num {
  font-family: var(--font-mono);
  font-size: clamp(36px, 5vw, 46px);
  font-weight: 700;
  line-height: 1;
  color: var(--ink);
  margin: 0;
}

.page-about .about-role__name {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 17px;
  color: var(--ink);
  margin: 14px 0 0;
}

.page-about .about-role__desc {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.9;
  color: var(--ink-dim);
}

.page-about .about-team__figure {
  margin: 32px 0 0;
  border: 1px solid var(--line);
  background: var(--panel);
  padding: 10px;
}

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

/* ---------- 整理链路 ---------- */
.page-about .about-flow {
  padding: var(--about-band) 0;
  background: linear-gradient(180deg, rgba(22, 35, 61, 0.62), rgba(5, 7, 15, 0.98));
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

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

.page-about .about-flow__step {
  background: var(--panel);
  padding: 24px 22px 26px;
  transition: background 240ms var(--ease);
}

.page-about .about-flow__step:hover,
.page-about .about-flow__step:focus-within {
  background: var(--zone);
}

.page-about .about-flow__code {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--magenta);
  margin: 0;
}

.page-about .about-flow__name {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 17px;
  line-height: 1.5;
  color: var(--ink);
  margin: 10px 0 0;
}

.page-about .about-flow__desc {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.9;
  color: var(--ink-dim);
}

/* ---------- 刷新节拍 ---------- */
.page-about .about-rhythm {
  padding: var(--about-band) 0;
}

.page-about .about-rhythm__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
}

.page-about .about-rhythm__figure {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--panel);
  padding: 10px;
}

.page-about .about-rhythm__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.page-about .about-rhythm__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-rhythm__item {
  padding: 22px 0;
  border-top: 1px solid var(--line);
}

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

.page-about .about-rhythm__time {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--orange);
  margin: 0;
}

.page-about .about-rhythm__name {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 17px;
  color: var(--ink);
  margin: 10px 0 0;
}

.page-about .about-rhythm__desc {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.9;
  color: var(--ink-dim);
}

/* ---------- 覆盖与合作 ---------- */
.page-about .about-reach {
  padding: var(--about-band) 0;
  border-top: 1px solid var(--line);
}

.page-about .about-reach__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
}

.page-about .about-reach__copy p {
  margin: 0 0 18px;
  font-size: 15px;
  line-height: 1.95;
  color: var(--ink-dim);
}

.page-about .about-reach__copy a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(44, 232, 224, 0.45);
  padding-bottom: 1px;
}

.page-about .about-reach__copy a:hover,
.page-about .about-reach__copy a:focus-visible {
  color: var(--yellow);
  border-bottom-color: var(--yellow);
}

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

.page-about .about-reach__stat {
  background: var(--panel);
  padding: 20px 16px 22px;
}

.page-about .about-reach__stat dt {
  font-size: 13px;
  line-height: 1.55;
  color: var(--ink-dim);
}

.page-about .about-reach__stat dd {
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.8vw, 36px);
  font-weight: 700;
  line-height: 1;
  color: var(--yellow);
  margin: 10px 0 0;
}

.page-about .about-reach__stat dd small {
  font-size: 0.36em;
  font-weight: 500;
  margin-left: 4px;
  color: var(--ink-dim);
}

/* ---------- 联系条 ---------- */
.page-about .about-contact {
  padding: 0 0 var(--about-band);
}

.page-about .about-contact__band {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
  align-items: center;
  padding: 30px 24px 32px;
  border: 1px solid var(--line);
  background:
    linear-gradient(122deg, rgba(44, 232, 224, 0.1), rgba(255, 62, 142, 0.07) 58%, rgba(5, 7, 15, 0) 100%),
    var(--panel);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--notch)), calc(100% - var(--notch)) 100%, 0 100%);
}

.page-about .about-contact__title {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(22px, 3vw, 30px);
  line-height: 1.4;
  color: var(--ink);
  margin: 0;
}

.page-about .about-contact__copy p {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.9;
  color: var(--ink-dim);
  max-width: 62ch;
}

.page-about .about-contact__lines {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 2;
  letter-spacing: 0.02em;
  color: var(--ink);
}

.page-about .about-contact__btn {
  justify-self: start;
}

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

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

@media (min-width: 960px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    column-gap: 64px;
  }

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

  .page-about .about-timeline__banner {
    margin-bottom: 56px;
  }

  .page-about .about-tl {
    padding-left: 48px;
  }

  .page-about .about-tl__item::before {
    left: -48px;
  }

  .page-about .about-tl__item {
    padding-bottom: 46px;
  }

  .page-about .about-rhythm__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    column-gap: 48px;
    align-items: start;
  }

  .page-about .about-rhythm__figure {
    position: sticky;
    top: 88px;
  }

  .page-about .about-reach__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    column-gap: 56px;
    align-items: start;
  }

  .page-about .about-contact__band {
    grid-template-columns: minmax(0, 1fr) auto;
    column-gap: 40px;
    padding: 38px 40px 40px;
  }

  .page-about .about-contact__btn {
    justify-self: end;
  }
}

@media (min-width: 1180px) {
  .page-about .about-team__grid {
    gap: 22px;
  }

  .page-about .about-flow__step {
    padding: 28px 26px 30px;
  }
}

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

  .page-about .about-rhythm__figure {
    position: static;
  }
}