.page-about {
  --about-gap: clamp(18px, 3.2vw, 34px);
  background: var(--jn-paper);
  color: var(--jn-body);
}

.page-about img {
  max-width: 100%;
  height: auto;
}

/* ── 面包屑 ───────────────────────────── */
.page-about .jn-crumbs {
  padding-top: clamp(16px, 3vw, 26px);
}

.page-about .jn-crumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0 6px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--jn-mono);
}

.page-about .jn-crumbs__list li + li::before {
  content: "/";
  margin-right: 6px;
  color: var(--jn-celadon-2);
}

.page-about .jn-crumbs__current {
  color: var(--jn-ink);
  font-weight: 600;
}

/* ── 首屏拼贴 ─────────────────────────── */
.page-about .about-hero {
  position: relative;
  padding: clamp(24px, 4.4vw, 50px) 0 clamp(40px, 6vw, 78px);
  background:
    radial-gradient(120% 96% at 100% 0%, rgba(169, 195, 206, .30) 0%, rgba(169, 195, 206, 0) 58%),
    linear-gradient(180deg, rgba(255, 253, 248, .92) 0%, rgba(244, 239, 230, 0) 64%);
}

.page-about .about-hero__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3.6vw, 42px);
}

.page-about .about-hero__kicker {
  margin: 0;
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: .14em;
  color: var(--jn-celadon);
}

.page-about .about-hero__title {
  margin: 12px 0 0;
  max-width: 17em;
  font-size: clamp(30px, 5.6vw, 52px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -.02em;
  color: var(--jn-ink);
}

.page-about .about-hero__lede {
  margin: clamp(14px, 2vw, 22px) 0 0;
  max-width: 34em;
  color: var(--jn-body);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  margin: clamp(22px, 3vw, 32px) 0 0;
}

.page-about .about-hero__stack {
  display: grid;
  gap: 12px;
  align-content: start;
}

.page-about .about-stat {
  padding: 16px 18px;
  background: var(--jn-white);
  border: 1px solid var(--jn-line);
  border-left: 3px solid var(--jn-celadon);
  box-shadow: 0 1px 0 var(--jn-line), 0 14px 30px -26px rgba(27, 23, 20, .6);
}

.page-about .about-stat__num {
  margin: 0;
  font-family: var(--jn-code);
  font-size: 34px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.01em;
  color: var(--jn-ink);
}

.page-about .about-stat__label {
  margin: 9px 0 0;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--jn-celadon);
}

.page-about .about-stat__note {
  margin: 6px 0 0;
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--jn-mono);
}

/* ── 章节骨架 ─────────────────────────── */
.page-about .jn-section.about-chapter {
  padding: clamp(44px, 6.6vw, 88px) 0;
}

.page-about .about-chapter + .about-chapter {
  border-top: 1px solid var(--jn-line);
}

.page-about .about-chapter__head {
  display: block;
  margin: 0 0 clamp(14px, 2.2vw, 22px);
}

.page-about .about-chapter__mark {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: clamp(12px, 1.8vw, 18px);
}

.page-about .about-chapter__mark .jn-section__num {
  font-family: var(--jn-code);
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--jn-celadon);
}

.page-about .about-chapter__title {
  margin: 0;
  max-width: 22em;
  font-size: clamp(24px, 3.7vw, 38px);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -.02em;
  color: var(--jn-ink);
}

.page-about .about-chapter__intro {
  max-width: 44em;
  margin: 0 0 clamp(22px, 3.4vw, 36px);
  font-size: clamp(16px, 1.6vw, 17.5px);
  line-height: 1.85;
  color: var(--jn-body);
}

/* ── 01 时间线 ────────────────────────── */
.page-about .about-timeline {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-timeline__item {
  min-width: 0;
}

.page-about .about-node {
  height: 100%;
  padding: 22px 20px 24px;
  background: var(--jn-white);
  border: 1px solid var(--jn-line);
  border-top: 4px solid var(--jn-celadon);
  box-shadow: 0 14px 30px -26px rgba(27, 23, 20, .7);
}

.page-about .about-node__year {
  margin: 0;
  font-family: var(--jn-code);
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.01em;
  color: var(--jn-ink);
}

.page-about .about-node__meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 12px 0 14px;
}

.page-about .about-node__title {
  margin: 0 0 8px;
  font-size: 19px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--jn-ink);
}

.page-about .about-node__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--jn-body);
}

@media (min-width: 760px) {
  .page-about .about-timeline {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }
}

/* ── 02 团队 ──────────────────────────── */
.page-about .about-team-figure {
  margin: 0 0 clamp(24px, 3.6vw, 38px);
}

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

.page-about .about-role {
  display: grid;
  gap: 9px;
  align-content: start;
}

.page-about .about-role__top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}

.page-about .about-role__name {
  font-size: 16px;
  font-weight: 700;
  color: var(--jn-ink);
}

.page-about .about-role__num {
  font-family: var(--jn-code);
  font-size: 22px;
  font-weight: 700;
  line-height: 1;
  color: var(--jn-celadon);
}

.page-about .about-role__bar {
  display: block;
  height: 8px;
  background: var(--jn-paper);
  border: 1px solid var(--jn-line);
  overflow: hidden;
}

.page-about .about-role__bar::after {
  content: "";
  display: block;
  height: 100%;
  width: var(--share, 0%);
  background: var(--bar, var(--jn-celadon));
  transition: width .4s var(--jn-ease);
}

.page-about .about-role__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--jn-mono);
}

.page-about .about-role:nth-child(1) { --share: 39%; --bar: var(--jn-celadon); }
.page-about .about-role:nth-child(2) { --share: 20%; --bar: var(--jn-night); }
.page-about .about-role:nth-child(3) { --share: 26%; --bar: var(--jn-celadon-2); }
.page-about .about-role:nth-child(4) { --share: 15%; --bar: var(--jn-mono); }

@media (min-width: 720px) {
  .page-about .about-roles {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 26px 40px;
  }
}

/* ── 03 六类内容 ──────────────────────── */
.page-about .about-columns {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 38px);
}

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

.page-about .about-cat {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 12px;
  padding: 15px 16px;
  background: var(--jn-white);
  border: 1px solid var(--jn-line);
  transition: transform .18s var(--jn-ease), border-color .18s var(--jn-ease);
}

.page-about .about-cat__icon {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  color: var(--jn-celadon);
  background: rgba(47, 107, 94, .10);
  border: 1px solid rgba(47, 107, 94, .22);
}

.page-about .about-cat__title {
  margin: 0 0 5px;
  font-size: 16.5px;
  font-weight: 700;
  color: var(--jn-ink);
}

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

.page-about .about-cats-figure {
  margin: 0;
}

@media (hover: hover) {
  .page-about .about-cat:hover {
    transform: translateY(-3px);
    border-color: var(--jn-celadon-2);
  }
}

@media (min-width: 560px) {
  .page-about .about-cats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 880px) {
  .page-about .about-columns {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: start;
  }
}

/* ── 04 深色产能分区 ──────────────────── */
.page-about .about-volume {
  background: var(--jn-night);
  color: var(--jn-white);
}

.page-about .about-volume .about-chapter__mark .jn-section__num {
  color: var(--jn-vermilion);
}

.page-about .about-volume .jn-rule {
  opacity: .9;
}

.page-about .about-volume .about-chapter__title {
  color: var(--jn-white);
}

.page-about .about-volume .about-chapter__intro {
  color: rgba(255, 253, 248, .82);
}

.page-about .about-volume__stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 18px;
  margin: 0 0 clamp(24px, 3.4vw, 36px);
  padding: 0;
  list-style: none;
}

.page-about .about-volume__stats li {
  padding-top: 14px;
  border-top: 2px solid var(--jn-vermilion);
}

.page-about .about-volume__num {
  margin: 0;
  font-family: var(--jn-code);
  font-size: clamp(34px, 5vw, 46px);
  font-weight: 700;
  line-height: 1;
  color: var(--jn-white);
}

.page-about .about-volume__label {
  margin: 9px 0 0;
  font-size: 13.5px;
  letter-spacing: .08em;
  color: rgba(255, 253, 248, .72);
}

.page-about .about-beats {
  display: grid;
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px dashed rgba(255, 253, 248, .26);
}

.page-about .about-beats li {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 5px;
  padding: 15px 0;
  border-bottom: 1px dashed rgba(255, 253, 248, .26);
}

.page-about .about-beats__k {
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--jn-mist);
}

.page-about .about-beats__v {
  font-size: 15.5px;
  line-height: 1.75;
  color: rgba(255, 253, 248, .92);
}

@media (min-width: 720px) {
  .page-about .about-beats li {
    grid-template-columns: 150px minmax(0, 1fr);
    gap: 24px;
    align-items: baseline;
  }
}

/* ── 05 本地 ──────────────────────────── */
.page-about .about-local__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 38px);
  align-items: center;
}

.page-about .about-local__text p {
  margin: 0 0 15px;
  max-width: 40em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--jn-body);
}

.page-about .about-local__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-local__stats li {
  padding: 12px 0 0;
  border-top: 2px solid var(--jn-celadon-2);
}

.page-about .about-local__num {
  margin: 0;
  font-family: var(--jn-code);
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  color: var(--jn-celadon);
}

.page-about .about-local__label {
  margin: 8px 0 0;
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--jn-mono);
}

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

@media (min-width: 880px) {
  .page-about .about-local__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
  }
}

/* ── 06 合作 ──────────────────────────── */
.page-about .about-partners {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}

.page-about .about-partner {
  padding: 22px 20px 24px;
  background: var(--jn-white);
  border: 1px solid var(--jn-line);
  border-left: 4px solid var(--jn-celadon);
}

.page-about .about-partner--club {
  border-left-color: var(--jn-night);
}

.page-about .about-partner__title {
  margin: 0 0 10px;
  font-size: 19px;
  font-weight: 700;
  color: var(--jn-ink);
}

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

@media (min-width: 720px) {
  .page-about .about-partners {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
  }
}

/* ── 结尾行动区 ───────────────────────── */
.page-about .jn-section.about-next {
  padding: clamp(44px, 6.4vw, 84px) 0;
  border-top: 1px solid var(--jn-line);
  background: linear-gradient(180deg, rgba(169, 195, 206, .26) 0%, rgba(244, 239, 230, 0) 78%);
}

.page-about .about-next__inner {
  max-width: 46em;
}

.page-about .about-next__title {
  margin: 0 0 12px;
  font-size: clamp(22px, 3.2vw, 32px);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -.02em;
  color: var(--jn-ink);
}

.page-about .about-next__text {
  margin: 0 0 clamp(20px, 3vw, 28px);
  font-size: 16px;
  line-height: 1.82;
  color: var(--jn-body);
}

.page-about .about-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  margin: 0;
}

/* ── 动效降级 ─────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-cat,
  .page-about .about-role__bar::after {
    transition: none;
  }
  .page-about .about-cat:hover {
    transform: none;
  }
}