.page-about {
  --about-space: clamp(56px, 8vw, 108px);
  --about-rule: 1px solid var(--line);
  background: var(--ink);
  color: var(--fog);
  overflow-x: clip;
  padding-bottom: clamp(16px, 3vw, 32px);
}

.page-about .about-topline {
  padding-top: clamp(18px, 3vw, 28px);
}

/* ---------- 首屏画册式开篇 ---------- */
.page-about .about-hero {
  position: relative;
  padding-block: clamp(26px, 4vw, 52px) var(--about-space);
  border-bottom: var(--about-rule);
}

.page-about .about-hero__num {
  position: absolute;
  top: 0;
  right: var(--gutter);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(72px, 15vw, 168px);
  line-height: 0.92;
  letter-spacing: -0.05em;
  color: rgba(232, 240, 234, 0.07);
  pointer-events: none;
  user-select: none;
}

.page-about .about-hero__grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 44px);
  align-items: start;
}

.page-about .about-hero__spine {
  display: none;
}

.page-about .about-hero__title {
  margin: 12px 0 20px;
  font-family: var(--font-condensed);
  font-weight: 900;
  font-size: clamp(36px, 7vw, 82px);
  line-height: 0.98;
  letter-spacing: -0.01em;
  color: var(--fog);
}

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

.page-about .about-hero__lede {
  max-width: 46ch;
  margin: 0 0 24px;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.78;
  color: var(--graphite);
}

.page-about .about-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-hero__facts li {
  padding: 7px 12px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--fog);
  background: var(--glass);
}

.page-about .about-hero__aside {
  margin: 14px 0 0;
  padding-left: 12px;
  border-left: 2px solid var(--blue);
  font-size: 13px;
  line-height: 1.7;
  color: var(--graphite);
}

@media (min-width: 960px) {
  .page-about .about-hero__grid {
    grid-template-columns: 46px minmax(0, 1.06fr) minmax(0, 0.94fr);
    gap: clamp(28px, 3.5vw, 56px);
  }

  .page-about .about-hero__spine {
    display: flex;
    flex-direction: column;
    gap: 20px;
    padding-top: 8px;
    writing-mode: vertical-rl;
    font-family: var(--font-mono);
    font-size: 10.5px;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--graphite);
  }

  .page-about .about-hero__spine span:last-child {
    color: var(--amber);
  }
}

/* ---------- 通用区块头 ---------- */
.page-about .about-head {
  max-width: 720px;
  margin-bottom: clamp(26px, 4vw, 48px);
}

.page-about .about-head__title {
  margin: 10px 0 14px;
  font-family: var(--font-condensed);
  font-weight: 900;
  font-size: clamp(26px, 4.2vw, 48px);
  line-height: 1.06;
  letter-spacing: -0.01em;
  color: var(--fog);
}

.page-about .about-head__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--graphite);
}

.page-about .about-head--band {
  max-width: 780px;
}

/* ---------- 图片容器 ---------- */
.page-about .about-figure {
  position: relative;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--board);
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  filter: saturate(0.82) contrast(1.06) brightness(0.95);
}

.page-about .about-figure::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(232, 240, 234, 0.07) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(232, 240, 234, 0.07) 1px, transparent 1px);
  background-size: 64px 64px;
}

.page-about .about-figure__caption {
  position: relative;
  z-index: 2;
  margin: 0;
  padding: 10px 14px;
  border-top: 1px solid var(--line);
  background: var(--deep);
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.55;
  letter-spacing: 0.08em;
  color: var(--graphite);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  padding-block: var(--about-space);
}

.page-about .about-timeline__list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-node {
  position: relative;
  padding-left: 18px;
  border-left: 1px solid var(--line-strong);
}

.page-about .about-node::before {
  content: "";
  position: absolute;
  top: 10px;
  left: -4px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--lime);
}

.page-about .about-node__year {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: clamp(19px, 2.2vw, 26px);
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--amber);
}

.page-about .about-node__title {
  margin: 0 0 8px;
  font-family: var(--font-condensed);
  font-size: clamp(17px, 1.9vw, 21px);
  line-height: 1.3;
  color: var(--fog);
}

.page-about .about-node__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--graphite);
}

.page-about .about-node__more {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 260ms ease;
}

.page-about .about-node__more-inner {
  overflow: hidden;
}

.page-about .about-node__more p {
  margin: 10px 0 0;
  padding-left: 11px;
  border-left: 2px solid var(--lime);
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--fog);
}

.page-about .about-node:hover .about-node__more,
.page-about .about-node:focus-within .about-node__more {
  grid-template-rows: 1fr;
}

@media (hover: none) {
  .page-about .about-node__more {
    grid-template-rows: 1fr;
  }
}

@media (min-width: 900px) {
  .page-about .about-timeline__list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: clamp(16px, 2.4vw, 32px);
  }

  .page-about .about-node {
    padding: 20px 0 0;
    border-left: 0;
    border-top: 1px solid var(--line-strong);
  }

  .page-about .about-node::before {
    top: -4px;
    left: 0;
  }
}

/* ---------- 主体两栏 ---------- */
.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(32px, 5vw, 56px);
  padding-block: clamp(8px, 2vw, 16px) var(--about-space);
  border-top: var(--about-rule);
}

.page-about .about-body__main {
  display: grid;
  gap: clamp(48px, 6vw, 88px);
  min-width: 0;
  padding-top: clamp(32px, 5vw, 56px);
}

@media (min-width: 1024px) {
  .page-about .about-body {
    grid-template-columns: minmax(0, 1fr) 288px;
    align-items: start;
    gap: clamp(36px, 4vw, 64px);
  }
}

/* ---------- 团队 ---------- */
.page-about .about-team__figure {
  margin-bottom: clamp(24px, 3.5vw, 36px);
}

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

.page-about .about-roles__item {
  padding: 18px 18px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--deep);
}

.page-about .about-roles__meta {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--lime);
}

.page-about .about-roles__title {
  margin: 0 0 8px;
  font-family: var(--font-condensed);
  font-size: 17px;
  line-height: 1.35;
  color: var(--fog);
}

.page-about .about-roles__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--graphite);
}

@media (min-width: 620px) {
  .page-about .about-roles {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ---------- 本地化 ---------- */
.page-about .about-local__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3.5vw, 36px);
}

.page-about .about-local__text {
  margin: 0 0 22px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--graphite);
}

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

.page-about .about-local__stat {
  padding: 14px 14px 16px;
  border-top: 2px solid var(--blue);
  background: var(--glass);
  border-radius: 0 0 var(--radius) var(--radius);
}

.page-about .about-local__num {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: clamp(19px, 2.4vw, 24px);
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--fog);
}

.page-about .about-local__label {
  display: block;
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--graphite);
}

@media (min-width: 720px) {
  .page-about .about-local__grid {
    grid-template-columns: minmax(0, 0.86fr) minmax(0, 1fr);
    align-items: start;
  }
}

/* ---------- 三季路径侧栏 ---------- */
.page-about .about-rail {
  min-width: 0;
}

.page-about .rail-panel {
  padding: 16px 16px 18px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--glass);
}

.page-about .rail-panel__summary {
  display: flex;
  flex-direction: column;
  gap: 4px;
  cursor: pointer;
  list-style: none;
}

.page-about .rail-panel__summary::-webkit-details-marker {
  display: none;
}

.page-about .rail-panel__summary::after {
  content: "展开 / 收起";
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--lime);
}

.page-about .rail-panel__label {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--amber);
}

.page-about .rail-panel__title {
  font-family: var(--font-condensed);
  font-size: 17px;
  line-height: 1.35;
  color: var(--fog);
}

.page-about .rail-panel__body {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.page-about .rail-panel__body p {
  margin: 0 0 12px;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--graphite);
}

.page-about .rail-panel__list {
  margin: 0 0 14px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}

.page-about .rail-panel__list li {
  position: relative;
  padding-left: 14px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--fog);
}

.page-about .rail-panel__list li::before {
  content: "";
  position: absolute;
  top: 9px;
  left: 0;
  width: 6px;
  height: 1px;
  background: var(--lime);
}

.page-about .rail-panel__link {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  padding-bottom: 2px;
}

.page-about .rail-panel__link:hover,
.page-about .rail-panel__link:focus-visible {
  color: var(--lime);
}

@media (min-width: 1024px) {
  .page-about .about-rail {
    position: sticky;
    top: calc(var(--header-h) + 24px);
    padding-top: clamp(32px, 5vw, 56px);
  }
}

/* ---------- 合作生态横向带 ---------- */
.page-about .about-partners {
  padding-block: var(--about-space);
  border-block: 1px solid var(--line-strong);
  background:
    linear-gradient(118deg, rgba(20, 61, 49, 0.92), rgba(15, 42, 34, 0.66) 58%, rgba(11, 15, 14, 0.94));
}

.page-about .about-partners__list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin: 0 0 clamp(24px, 3.5vw, 36px);
  padding: 0;
  list-style: none;
}

.page-about .about-partner {
  padding: 20px 18px 22px;
  border-left: 3px solid var(--line-strong);
  background: rgba(11, 15, 14, 0.42);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.page-about .about-partner--blue {
  border-left-color: var(--blue);
}

.page-about .about-partner--lime {
  border-left-color: var(--lime);
}

.page-about .about-partner--violet {
  border-left-color: var(--violet);
}

.page-about .about-partner__num {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.4vw, 36px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--fog);
}

.page-about .about-partner__title {
  margin: 0 0 8px;
  font-family: var(--font-condensed);
  font-size: 16.5px;
  line-height: 1.35;
  color: var(--fog);
}

.page-about .about-partner__text {
  margin: 0;
  font-size: 13.8px;
  line-height: 1.72;
  color: var(--graphite);
}

.page-about .about-honor {
  display: grid;
  gap: 10px;
  padding-top: 20px;
  border-top: 1px dashed var(--line-strong);
}

.page-about .about-honor__item {
  margin: 0;
  font-size: 13.8px;
  line-height: 1.7;
  color: var(--fog);
}

.page-about .about-honor__key {
  display: inline-block;
  margin-right: 10px;
  padding: 3px 8px;
  border-radius: var(--radius);
  background: var(--warn);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
}

@media (min-width: 760px) {
  .page-about .about-partners__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

  .page-about .about-honor {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
  }
}

/* ---------- 收尾 ---------- */
.page-about .about-next {
  padding-block: var(--about-space);
}

.page-about .about-next__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3.5vw, 40px);
  align-items: center;
}

.page-about .about-next__text {
  margin: 0;
  max-width: 46ch;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--graphite);
}

.page-about .about-next__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

@media (min-width: 900px) {
  .page-about .about-next__inner {
    grid-template-columns: minmax(0, 1fr) auto;
  }

  .page-about .about-next__links {
    justify-content: flex-end;
    max-width: 460px;
  }
}
</