.page-about {
  --about-cut: 28px;
  --about-narrow: 46ch;
  --about-wide: 68ch;
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--text-2);
  margin-bottom: clamp(28px, 4vw, 52px);
}

.page-about .breadcrumbs a {
  color: var(--text-2);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

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

.page-about .breadcrumbs__sep {
  color: rgba(159, 176, 204, .5);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-top: clamp(24px, 3.5vw, 48px);
  padding-bottom: clamp(48px, 7vw, 96px);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(32px, 5vw, 64px);
  align-items: end;
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-size: clamp(36px, 6vw, 66px);
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: -.01em;
  color: var(--text);
  margin: 16px 0 0;
  text-wrap: balance;
}

.page-about .about-hero__lede {
  margin-top: clamp(20px, 3vw, 32px);
  max-width: 56ch;
  color: var(--text-2);
}

.page-about .about-hero__aside {
  display: flex;
  flex-direction: column;
  gap: 18px;
  align-items: flex-start;
  padding-left: 20px;
  border-left: 1px solid var(--grid-line);
}

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

.page-about .about-yearblock__num {
  font-family: var(--font-display);
  font-size: clamp(52px, 7vw, 80px);
  font-weight: 900;
  line-height: .86;
  letter-spacing: -.02em;
  color: var(--cyan);
}

.page-about .about-yearblock__label {
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--text-2);
}

.page-about .about-hero__note {
  margin: 0;
  font-size: 15px;
  max-width: 34ch;
}

.page-about .about-orbit {
  width: 100%;
  max-width: 260px;
  height: auto;
  opacity: .9;
}

/* ---------- 章节头 ---------- */
.page-about .about-head {
  max-width: 62ch;
  margin-bottom: clamp(32px, 5vw, 56px);
}

.page-about .about-head__note {
  margin-top: 16px;
  max-width: 58ch;
}

/* ---------- 横跨图 ---------- */
.page-about .about-banner {
  position: relative;
  margin: 0 0 clamp(44px, 6vw, 80px);
  overflow: hidden;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--about-cut)), calc(100% - var(--about-cut)) 100%, 0 100%);
}

.page-about .about-banner img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  filter: saturate(.92) contrast(1.06);
}

.page-about .about-banner figcaption {
  position: absolute;
  left: clamp(14px, 2.4vw, 26px);
  bottom: clamp(14px, 2.4vw, 26px);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--text);
  background: rgba(11, 18, 32, .74);
  padding: 6px 12px;
}

/* ---------- 时间轴 ---------- */
.page-about .timeline {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: clamp(34px, 5vw, 52px);
}

.page-about .timeline__spine {
  position: absolute;
  left: 11px;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan) 0%, var(--violet) 62%, rgba(122, 92, 255, 0) 100%);
  opacity: .55;
}

.page-about .timeline__node {
  position: relative;
  padding-left: 44px;
}

.page-about .timeline__node::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 6px;
  width: 11px;
  height: 11px;
  box-sizing: border-box;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--cyan);
  box-shadow: 0 0 0 4px rgba(43, 217, 210, .12);
}

.page-about .timeline__year {
  font-size: 13px;
  letter-spacing: .18em;
  color: var(--cyan);
  margin: 0;
}

.page-about .timeline__title {
  font-family: var(--font-display);
  font-size: clamp(24px, 2.8vw, 32px);
  font-weight: 800;
  letter-spacing: -.01em;
  line-height: 1.16;
  color: var(--text);
  margin: 10px 0 12px;
}

.page-about .timeline__text {
  margin: 0;
  color: var(--text-2);
  max-width: var(--about-narrow);
}

/* ---------- 阶段节奏带 ---------- */
.page-about .about-band {
  margin: clamp(44px, 6vw, 80px) 0 0;
}

.page-about .about-band img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 7 / 3;
  object-fit: cover;
  clip-path: polygon(24px 0, 100% 0, 100% 100%, 0 100%, 0 24px);
  filter: saturate(.95);
}

/* ---------- 团队 ---------- */
.page-about .about-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(32px, 5vw, 64px);
  align-items: center;
}

.page-about .about-team__figure {
  margin: 0;
  overflow: hidden;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--about-cut)), calc(100% - var(--about-cut)) 100%, 0 100%);
}

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
}

.page-about .about-team__lede {
  margin-top: 16px;
  max-width: 56ch;
  color: var(--text-2);
}

.page-about .team-bars {
  list-style: none;
  margin: clamp(26px, 3.5vw, 42px) 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: clamp(20px, 3vw, 30px);
}

.page-about .team-bar__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 10px;
}

.page-about .team-bar__name {
  font-size: 17px;
  font-weight: 500;
  color: var(--text);
}

.page-about .team-bar__num {
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--cyan);
}

.page-about .team-bar__track {
  height: 6px;
  background: var(--panel);
  border-radius: 999px;
  overflow: hidden;
}

.page-about .team-bar__fill {
  display: block;
  height: 100%;
  border-radius: 999px;
}

.page-about .team-bar__fill--edit {
  width: 50%;
  background: linear-gradient(90deg, var(--cyan), var(--violet));
}

.page-about .team-bar__fill--data {
  width: 27.8%;
  background: linear-gradient(90deg, var(--violet), var(--cyan));
}

.page-about .team-bar__fill--care {
  width: 22.2%;
  background: linear-gradient(90deg, var(--orange), var(--amber));
}

.page-about .team-bar__desc {
  margin: 10px 0 0;
  font-size: 15px;
  max-width: 58ch;
}

/* ---------- 更新节奏 ---------- */
.page-about .about-cadence__lede {
  margin-top: 16px;
  max-width: 56ch;
  color: var(--text-2);
}

.page-about .cadence {
  list-style: none;
  margin: clamp(30px, 4vw, 52px) 0 0;
  padding: 0;
  border-top: 1px solid var(--grid-line);
}

.page-about .cadence__item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  padding: clamp(22px, 3vw, 32px) 0;
  border-bottom: 1px solid var(--grid-line);
}

.page-about .cadence__freq {
  font-size: 13px;
  letter-spacing: .18em;
  color: var(--orange);
  margin: 0;
}

.page-about .cadence__title {
  font-family: var(--font-display);
  font-size: clamp(21px, 2.3vw, 27px);
  font-weight: 800;
  line-height: 1.2;
  color: var(--text);
  margin: 0;
}

.page-about .cadence__text {
  margin: 0;
  color: var(--text-2);
  max-width: var(--about-wide);
}

/* ---------- 用户分布 ---------- */
.page-about .about-community__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(32px, 5vw, 64px);
}

.page-about .about-community__main p {
  max-width: 62ch;
  color: var(--text-2);
}

.page-about .about-community__main p + p {
  margin-top: 18px;
}

.page-about .about-community__main h2 {
  margin-bottom: clamp(20px, 3vw, 28px);
}

.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 0;
  border-top: 1px solid var(--grid-line);
}

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

.page-about .about-stat__num {
  font-family: var(--font-display);
  font-size: clamp(30px, 3.8vw, 42px);
  font-weight: 900;
  line-height: 1;
  letter-spacing: -.01em;
  color: var(--cyan);
}

.page-about .about-stat__num--mono {
  font-family: var(--font-mono);
  font-size: clamp(18px, 2.2vw, 24px);
  letter-spacing: .02em;
}

.page-about .about-stat__num em {
  font-style: normal;
  color: var(--orange);
}

.page-about .about-stat__label {
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--text-2);
}

/* ---------- 会员反馈 ---------- */
.page-about .about-voice h2 {
  margin-bottom: clamp(18px, 2.6vw, 24px);
}

.page-about .about-voice__text {
  max-width: 62ch;
  color: var(--text-2);
  margin: 0;
}

/* ---------- 公开信息与去路 ---------- */
.page-about .about-foot {
  padding-bottom: clamp(96px, 12vw, 176px);
}

.page-about .about-foot__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 48px);
  align-items: end;
}

.page-about .about-foot__text {
  margin-top: 16px;
  max-width: 60ch;
  color: var(--text-2);
}

.page-about .about-foot__aside {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding-left: 18px;
  border-left: 1px solid var(--cyan);
}

.page-about .about-note {
  margin: 0;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--text-2);
  word-break: break-all;
}

.page-about .about-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(32px, 4.5vw, 52px);
}

/* ---------- 断点 ---------- */
@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
  }

  .page-about .timeline {
    gap: 0;
  }

  .page-about .timeline__spine {
    left: 50%;
    top: 0;
    bottom: 0;
  }

  .page-about .timeline__node {
    width: 50%;
    padding: 0 56px 72px 0;
    text-align: right;
  }

  .page-about .timeline__node:nth-of-type(odd) > * {
    margin-left: auto;
  }

  .page-about .timeline__node:nth-of-type(even) {
    margin-left: 50%;
    padding: 0 0 72px 56px;
    text-align: left;
  }

  .page-about .timeline__node::before {
    left: auto;
    right: -5.5px;
    top: 8px;
  }

  .page-about .timeline__node:nth-of-type(even)::before {
    left: -5.5px;
    right: auto;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }

  .page-about .about-community__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: start;
  }

  .page-about .about-foot__grid {
    grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
  }
}

@media (min-width: 760px) {
  .page-about .cadence__item {
    grid-template-columns: 120px minmax(0, 1fr) minmax(0, 1.5fr);
    align-items: baseline;
    gap: 6px 28px;
  }
}

@media (max-width: 420px) {
  .page-about .about-hero__aside {
    padding-left: 14px;
  }

  .page-about .about-banner,
  .page-about .about-team__figure {
    clip-path: none;
  }

  .page-about .about-band img {
    clip-path: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .breadcrumbs a,
  .page-about .team-bar__fill {
    transition: none;
  }
}