.page-about {
  --about-scope-gap: clamp(20px, 3.4vw, 44px);
  --about-card-pad: clamp(16px, 2.4vw, 26px);
  background: var(--ink);
}

/* ---------- 面包屑与首屏 ---------- */
.page-about .about-crumbs {
  padding-top: clamp(16px, 2.6vw, 30px);
}

.page-about .about-hero {
  display: grid;
  gap: clamp(14px, 2.2vw, 24px);
  padding: clamp(22px, 4vw, 52px) 0 clamp(40px, 7vw, 88px);
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero__title {
  margin: 0;
  max-width: 13em;
}

.page-about .about-hero__body {
  display: grid;
  gap: clamp(12px, 1.8vw, 18px);
  max-width: 44em;
}

.page-about .about-hero__body p {
  margin: 0;
  line-height: 1.85;
}

.page-about .about-hero__body p:not(.about-hero__lead) {
  color: var(--muted);
}

.page-about .about-hero__body .about-hero__lead {
  font-size: clamp(17px, 1.5vw, 20px);
  line-height: 1.8;
  color: var(--paper);
}

/* ---------- 通用区块标题 ---------- */
.page-about .about-head {
  display: grid;
  gap: 12px;
  padding-bottom: clamp(16px, 2.4vw, 26px);
  border-bottom: 1px solid var(--line);
}

.page-about .about-h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(26px, 3.6vw, 44px);
  font-weight: 700;
  letter-spacing: 0.01em;
  line-height: 1.2;
  color: var(--paper);
}

.page-about .about-lede {
  margin: 0;
  max-width: 42em;
  color: var(--muted);
  line-height: 1.85;
}

/* ---------- 时间线 ---------- */
.page-about .about-chron .shell {
  padding-top: clamp(40px, 6vw, 76px);
  padding-bottom: clamp(40px, 6vw, 76px);
}

.page-about .about-timeline {
  list-style: none;
  margin: clamp(24px, 4vw, 44px) 0 0;
  padding: 0;
  display: grid;
  gap: clamp(22px, 3.4vw, 40px);
}

.page-about .about-timeline__item {
  position: relative;
  padding-left: 30px;
  display: grid;
  gap: 12px;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 9px;
  height: 9px;
  background: var(--ink);
  border: 1px solid var(--cyan);
  transition: background var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}

.page-about .about-timeline__item::after {
  content: "";
  position: absolute;
  left: 4px;
  top: 24px;
  bottom: -8px;
  width: 1px;
  background: var(--line);
}

.page-about .about-timeline__item:last-child::after {
  display: none;
}

.page-about .about-timeline__item:hover::before,
.page-about .about-timeline__item:focus-within::before {
  background: var(--cyan);
}

.page-about .about-timeline__year {
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--cyan);
  margin: 0;
}

.page-about .about-timeline__card {
  border: 1px solid var(--line);
  background: var(--ink-2);
  padding: var(--about-card-pad);
  display: grid;
  gap: 10px;
}

.page-about .about-timeline__title {
  margin: 0;
  font-size: clamp(17px, 1.5vw, 20px);
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-timeline__card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.85;
  max-width: 40em;
}

/* ---------- 数字带 ---------- */
.page-about .about-band {
  position: relative;
  overflow: hidden;
  background: var(--ink-2);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .about-band::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(90deg, var(--line) 0 1px, transparent 1px 72px);
  opacity: 0.6;
  pointer-events: none;
}

.page-about .about-band__inner {
  position: relative;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
}

.page-about .about-band__item {
  background: var(--ink-2);
  padding: clamp(16px, 2.6vw, 28px) clamp(12px, 2vw, 22px);
  display: grid;
  gap: 8px;
  align-content: start;
}

.page-about .about-band__num {
  font-size: clamp(26px, 4.2vw, 44px);
  line-height: 1;
  color: var(--paper);
}

.page-about .about-band__num--cyan {
  color: var(--cyan);
}

.page-about .about-band__label {
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--muted);
  line-height: 1.5;
}

/* ---------- 图片通用 ---------- */
.page-about .media {
  margin: 0;
  border: 1px solid var(--line);
  overflow: hidden;
}

.page-about .media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-figure {
  margin: 0 0 clamp(28px, 4.6vw, 56px);
  aspect-ratio: 2 / 1;
}

.page-about .about-figure img {
  height: 100%;
}

/* ---------- 看台视角 ---------- */
.page-about .about-view .shell {
  padding-top: clamp(40px, 6vw, 80px);
  padding-bottom: clamp(40px, 6vw, 80px);
}

.page-about .about-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: clamp(18px, 2.6vw, 28px);
}

.page-about .about-chips .chip {
  text-decoration: none;
}

.page-about .about-modules {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  margin-top: clamp(16px, 2.4vw, 26px);
}

.page-about .about-module {
  background: var(--ink-2);
  padding: var(--about-card-pad);
  display: grid;
  gap: 10px;
  align-content: start;
  scroll-margin-top: 96px;
}

.page-about .about-module__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-about .about-module__title {
  margin: 0;
  font-size: clamp(16px, 1.4vw, 19px);
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-module__text {
  margin: 0;
  color: var(--muted);
  line-height: 1.82;
  font-size: 15px;
}

/* ---------- 团队 ---------- */
.page-about .about-team-section .shell {
  padding-top: clamp(40px, 6vw, 80px);
  padding-bottom: clamp(40px, 6vw, 80px);
}

.page-about .about-team {
  list-style: none;
  margin: clamp(22px, 3.4vw, 36px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-team__row {
  background: var(--ink-2);
  display: grid;
  gap: 8px;
  padding: var(--about-card-pad);
}

.page-about .about-team__num {
  font-size: clamp(24px, 3.2vw, 34px);
  line-height: 1;
  color: var(--paper);
}

.page-about .about-team__role {
  font-size: 14px;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-about .about-team__desc {
  color: var(--muted);
  line-height: 1.85;
  max-width: 46em;
}

/* ---------- 数据流程 ---------- */
.page-about .about-flow-section .shell {
  padding-top: clamp(40px, 6vw, 80px);
  padding-bottom: clamp(40px, 6vw, 80px);
}

.page-about .about-flow {
  display: grid;
  gap: var(--about-scope-gap);
}

.page-about .about-flow__list {
  list-style: none;
  margin: clamp(22px, 3.4vw, 34px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border-top: 1px solid var(--line);
}

.page-about .about-flow__list li {
  background: var(--ink);
  padding: clamp(16px, 2.2vw, 24px) 0;
  border-bottom: 1px solid var(--line);
  display: grid;
  gap: 8px;
}

.page-about .about-flow__list h3 {
  margin: 0;
  font-size: clamp(16px, 1.4vw, 19px);
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-flow__list p {
  margin: 0;
  color: var(--muted);
  line-height: 1.85;
  max-width: 44em;
}

.page-about .about-flow__figure {
  margin: 0;
  aspect-ratio: 3 / 2;
}

.page-about .about-flow__figure img {
  height: 100%;
}

/* ---------- 覆盖范围 ---------- */
.page-about .about-reach .shell {
  padding-top: clamp(40px, 6vw, 80px);
  padding-bottom: clamp(40px, 6vw, 80px);
}

.page-about .about-reach__grid {
  margin-top: clamp(22px, 3.4vw, 36px);
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-reach__cell {
  background: var(--ink-2);
  padding: var(--about-card-pad);
  display: grid;
  gap: 8px;
  align-content: start;
}

.page-about .about-reach__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(30px, 4.6vw, 48px);
  line-height: 1;
  color: var(--paper);
}

.page-about .about-reach__num--cyan {
  color: var(--cyan);
}

.page-about .about-reach__label {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
  font-size: 15px;
}

.page-about .about-reach__cell--wide {
  background: var(--ink);
}

/* ---------- 认可 ---------- */
.page-about .about-honor .shell {
  padding-top: clamp(40px, 6vw, 80px);
  padding-bottom: clamp(40px, 6vw, 80px);
}

.page-about .about-honor__grid {
  margin-top: clamp(22px, 3.4vw, 36px);
  display: grid;
  gap: clamp(16px, 2.4vw, 26px);
}

.page-about .about-honor__card {
  border: 1px solid var(--line);
  border-left: 3px solid var(--cyan);
  background: var(--ink-2);
  padding: var(--about-card-pad);
  display: grid;
  gap: 12px;
  align-content: start;
}

.page-about .about-honor__card .tag {
  justify-self: start;
}

.page-about .about-honor__card h3 {
  margin: 0;
  font-size: clamp(16px, 1.5vw, 19px);
  font-weight: 700;
  line-height: 1.5;
  color: var(--paper);
}

.page-about .about-honor__card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.85;
  font-size: 15px;
}

/* ---------- 结尾 ---------- */
.page-about .about-closing .shell {
  padding-top: clamp(40px, 6vw, 80px);
  padding-bottom: clamp(36px, 5vw, 64px);
}

.page-about .about-closing__links {
  margin-top: clamp(22px, 3.4vw, 36px);
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-link {
  background: var(--ink-2);
  padding: var(--about-card-pad);
  display: grid;
  gap: 8px;
  text-decoration: none;
  transition: background var(--t-fast) var(--ease), transform var(--t-fast) var(--ease);
}

.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  background: var(--ink);
  transform: translateX(4px);
}

.page-about .about-link__index {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--muted);
}

.page-about .about-link__title {
  font-size: clamp(17px, 1.6vw, 21px);
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-link__desc {
  color: var(--muted);
  font-size: 15px;
  line-height: 1.7;
}

.page-about .about-link--accent {
  border-left: 3px solid var(--red);
}

.page-about .about-link--accent .about-link__index {
  color: var(--red);
}

.page-about .about-closing__figure {
  margin: clamp(28px, 4.6vw, 52px) 0 0;
  aspect-ratio: 8 / 3;
}

.page-about .about-closing__figure img {
  height: 100%;
}

/* ---------- 平板 ---------- */
@media (min-width: 760px) {
  .page-about .about-band__inner {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

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

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

  .page-about .about-reach__cell--wide {
    grid-column: 1 / -1;
  }

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

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

/* ---------- 桌面 ---------- */
@media (min-width: 980px) {
  .page-about .about-timeline__item {
    grid-template-columns: 132px minmax(0, 1fr);
    column-gap: clamp(20px, 3vw, 40px);
    padding-left: 34px;
    align-items: start;
  }

  .page-about .about-timeline__year {
    padding-top: 4px;
    font-size: 15px;
  }

  .page-about .about-team__row {
    grid-template-columns: 72px 168px minmax(0, 1fr);
    align-items: baseline;
    column-gap: clamp(18px, 2.6vw, 34px);
  }

  .page-about .about-flow {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
  }

  .page-about .about-flow__list {
    border-top: none;
  }

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

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

@media (min-width: 1180px) {
  .page-about .about-modules {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

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

  .page-about .about-link:hover,
  .page-about .about-link:focus-visible {
    transform: none;
  }
}