/* ============ page-about · 品牌故事 ============ */

.page-about {
  --ab-body-fg: #2E2833;
  background-color: var(--ivory);
  color: var(--ink);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  padding: clamp(1.5rem, 3vw, 2.25rem) 0 clamp(2.5rem, 5vw, 4rem);
  background:
    radial-gradient(120% 95% at 86% 0%, rgba(200, 161, 90, .30) 0%, rgba(200, 161, 90, 0) 58%),
    linear-gradient(168deg, var(--wine) 0%, var(--wine-deep) 100%);
  color: var(--ivory);
  overflow: hidden;
}

.page-about .breadcrumbs {
  margin-bottom: clamp(1.5rem, 4vw, 2.5rem);
}

.page-about .breadcrumbs a,
.page-about .breadcrumbs li,
.page-about .breadcrumbs span {
  color: rgba(247, 242, 234, .72);
}

.page-about .breadcrumbs a:hover,
.page-about .breadcrumbs a:focus-visible {
  color: var(--gold-light);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(2rem, 4.5vw, 3.5rem);
  align-items: center;
}

.page-about .about-hero__title {
  margin: .9rem 0 1.25rem;
  max-width: 13em;
  font-family: var(--serif);
  font-weight: 800;
  font-size: clamp(1.85rem, 4.6vw, 3.3rem);
  line-height: 1.2;
  letter-spacing: -.01em;
  color: #FFFFFF;
}

.page-about .about-hero__lede {
  margin: 0 0 1.85rem;
  max-width: 40ch;
  font-size: clamp(.98rem, 1.1vw, 1.06rem);
  line-height: 1.88;
  color: rgba(247, 242, 234, .84);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
}

.page-about .about-hero__figure {
  margin: 0;
  border-radius: var(--radius-lg) var(--radius-lg) var(--radius-lg) 8px;
  overflow: hidden;
  box-shadow: 0 32px 64px -34px rgba(0, 0, 0, .6);
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
  filter: saturate(.86) contrast(1.06);
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem 1.5rem;
  margin: clamp(2rem, 4vw, 3rem) 0 0;
  padding: 1.35rem 0 0;
  border-top: 1px solid rgba(200, 161, 90, .35);
  list-style: none;
  font-size: .88rem;
  line-height: 1.5;
  color: rgba(247, 242, 234, .76);
}

.page-about .about-hero__facts .mono {
  display: block;
  margin-bottom: .2rem;
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--gold-light);
}

/* ---------- 章节轨道 ---------- */

.page-about .about-rail {
  display: grid;
  gap: clamp(2rem, 4vw, 3rem);
  padding: clamp(2.5rem, 6vw, 5rem) 0 clamp(3rem, 7vw, 6rem);
}

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

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

.page-about .about-rail__label {
  margin: 0 0 1rem;
  font-size: .72rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-about .about-rail__list {
  display: grid;
  gap: .1rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-rail__item {
  display: grid;
  grid-template-columns: 2rem minmax(0, 1fr);
  gap: .55rem;
  padding: .5rem 0 .5rem .6rem;
  border-left: 2px solid transparent;
  font-size: .85rem;
  line-height: 1.5;
  color: var(--gray);
  text-decoration: none;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-about .about-rail__item:hover,
.page-about .about-rail__item:focus-visible {
  color: var(--wine);
  border-left-color: var(--gold);
}

.page-about .about-rail__num {
  font-size: .78rem;
  letter-spacing: .06em;
  color: var(--gold);
}

/* ---------- 章节 ---------- */

.page-about .about-chapter {
  position: relative;
  padding-top: clamp(2.75rem, 6vw, 4.5rem);
  scroll-margin-top: calc(var(--masthead-h, 64px) + 1.5rem);
}

.page-about .about-chapter::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 8px;
  background-image: repeating-linear-gradient(
    90deg,
    rgba(110, 18, 48, .12) 0 2px,
    rgba(110, 18, 48, 0) 2px 9px
  );
}

.page-about .about-chapter:first-child {
  padding-top: 0;
}

.page-about .about-chapter:first-child::before {
  display: none;
}

.page-about .about-chapter__head {
  margin-bottom: clamp(1.25rem, 2.5vw, 1.85rem);
}

.page-about .about-chapter__num {
  margin: 0 0 .7rem;
  font-size: .8rem;
  letter-spacing: .14em;
  color: var(--gold);
}

.page-about .about-chapter__num::after {
  content: "";
  display: inline-block;
  width: 2.5rem;
  height: 1px;
  margin-left: .75rem;
  vertical-align: middle;
  background: rgba(142, 36, 68, .5);
}

.page-about .about-chapter__title {
  margin: 0;
  max-width: 15em;
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(1.45rem, 2.7vw, 2.05rem);
  line-height: 1.38;
  letter-spacing: -.005em;
  color: var(--ink);
}

.page-about .about-chapter__lead {
  margin: 1rem 0 0;
  max-width: 38ch;
  font-size: .96rem;
  line-height: 1.85;
  color: var(--gray);
}

.page-about .about-chapter__body {
  max-width: 40rem;
}

.page-about .about-chapter__body > p {
  margin: 0 0 1.15em;
  font-size: 1.02rem;
  line-height: 1.9;
  color: var(--ab-body-fg);
}

.page-about .about-chapter__body > p:last-child {
  margin-bottom: 0;
}

/* 引用式关键段落 */

.page-about .about-pull {
  margin: 2.25rem 0;
  padding: .4rem 0 .4rem 1.35rem;
  border-left: 3px solid var(--wine);
  background: linear-gradient(90deg, rgba(110, 18, 48, .06) 0%, rgba(110, 18, 48, 0) 92%);
}

.page-about .about-pull p {
  margin: 0;
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(1.05rem, 1.9vw, 1.28rem);
  line-height: 1.75;
  color: var(--wine);
}

/* ---------- 时间线 ---------- */

.page-about .about-timeline {
  display: grid;
  gap: 1rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-timeline__item {
  display: grid;
  grid-template-columns: 1.5rem minmax(0, 1fr);
}

.page-about .about-timeline__rail {
  position: relative;
  display: block;
}

.page-about .about-timeline__rail::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 0;
  bottom: -1rem;
  width: 1px;
  transform: translateX(-50%);
  background: linear-gradient(180deg, rgba(200, 161, 90, .8) 0%, rgba(200, 161, 90, .28) 100%);
}

.page-about .about-timeline__item:last-child .about-timeline__rail::before {
  top: 0;
  bottom: auto;
  height: 1.1rem;
}

.page-about .about-timeline__rail::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 1.1rem;
  width: .55rem;
  height: .55rem;
  border-radius: 50%;
  transform: translate(-50%, -50%);
  background: var(--gold);
  box-shadow: 0 0 0 4px rgba(200, 161, 90, .18);
}

.page-about .about-node {
  border: 1px solid rgba(110, 18, 48, .14);
  border-radius: var(--radius-md);
  background: var(--paper);
  overflow: hidden;
  transition: border-color .22s var(--ease), box-shadow .22s var(--ease);
}

.page-about .about-node[open] {
  border-color: rgba(110, 18, 48, .3);
  box-shadow: 0 20px 42px -32px rgba(74, 11, 32, .6);
}

.page-about .about-node__summary {
  display: grid;
  grid-template-columns: 3.6rem minmax(0, 1fr) 1rem;
  align-items: center;
  gap: .8rem;
  padding: .95rem 1.05rem;
  cursor: pointer;
  list-style: none;
}

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

.page-about .about-node__summary::after {
  content: "";
  justify-self: end;
  width: .5rem;
  height: .5rem;
  border-right: 2px solid var(--wine-mid);
  border-bottom: 2px solid var(--wine-mid);
  transform: rotate(45deg);
  transition: transform .22s var(--ease);
}

.page-about .about-node[open] .about-node__summary::after {
  transform: rotate(225deg);
}

.page-about .about-node__year {
  font-size: .84rem;
  letter-spacing: .06em;
  color: var(--gold);
}

.page-about .about-node__topic {
  font-size: .98rem;
  font-weight: 600;
  line-height: 1.6;
  color: var(--wine);
}

.page-about .about-node__panel {
  padding: 0 1.05rem 1.1rem;
}

.page-about .about-node__panel p {
  margin: 0;
  max-width: 36rem;
  font-size: .96rem;
  line-height: 1.88;
  color: var(--ab-body-fg);
}

/* ---------- 配图 ---------- */

.page-about .about-figure {
  margin: clamp(1.85rem, 4vw, 2.5rem) 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  object-fit: cover;
}

.page-about .about-figure--tall {
  max-width: 22rem;
}

.page-about .about-figure--tall img {
  aspect-ratio: 5 / 6;
}

.page-about .about-figure--banner img {
  aspect-ratio: 3 / 2;
}

.page-about .about-figure__caption {
  margin: .85rem 0 0;
  padding-left: .9rem;
  border-left: 2px solid var(--gold);
  font-size: .84rem;
  line-height: 1.72;
  color: var(--gray);
}

/* ---------- 折叠清单片段 ---------- */

.page-about .about-fold {
  margin-top: 1.85rem;
  border-radius: var(--radius-md);
  background: var(--sand);
  overflow: hidden;
}

.page-about .about-fold__summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.1rem;
  font-size: .95rem;
  font-weight: 600;
  color: var(--wine);
  cursor: pointer;
  list-style: none;
}

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

.page-about .about-fold__summary::after {
  content: "";
  flex: none;
  width: .5rem;
  height: .5rem;
  border-right: 2px solid var(--wine-mid);
  border-bottom: 2px solid var(--wine-mid);
  transform: rotate(45deg);
  transition: transform .22s var(--ease);
}

.page-about .about-fold[open] .about-fold__summary::after {
  transform: rotate(225deg);
}

.page-about .about-fold__list {
  display: grid;
  gap: .5rem;
  margin: 0;
  padding: 0 1.1rem 1.1rem;
  list-style: none;
}

.page-about .about-fold__list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: .3rem .7rem;
  padding: .7rem .85rem;
  border-radius: var(--radius-sm);
  background: rgba(255, 252, 247, .82);
  font-size: .92rem;
  line-height: 1.7;
  color: var(--ab-body-fg);
}

.page-about .about-fold__text {
  flex: 1 1 12rem;
  min-width: 0;
}

.page-about .about-fold__time {
  margin-left: auto;
  font-size: .8rem;
  color: var(--gray);
}

/* ---------- 团队分工 ---------- */

.page-about .about-teams {
  display: grid;
  gap: 1px;
  margin: 1.85rem 0 0;
  padding: 0;
  list-style: none;
  border: 1px solid rgba(110, 18, 48, .14);
  border-radius: var(--radius-md);
  background: rgba(110, 18, 48, .12);
  overflow: hidden;
}

.page-about .about-team {
  padding: clamp(1.1rem, 2.6vw, 1.65rem);
  background: var(--paper);
}

.page-about .about-team__code {
  margin: 0 0 .5rem;
  font-size: .76rem;
  letter-spacing: .16em;
  color: var(--gold);
}

.page-about .about-team__name {
  margin: 0 0 .6rem;
  font-family: var(--serif);
  font-weight: 700;
  font-size: 1.12rem;
  line-height: 1.45;
  color: var(--wine);
}

.page-about .about-team__desc {
  margin: 0;
  font-size: .94rem;
  line-height: 1.86;
  color: var(--ab-body-fg);
}

/* ---------- 收束入口 ---------- */

.page-about .about-next {
  position: relative;
  padding: clamp(2.75rem, 6vw, 4.5rem) 0 clamp(3rem, 6vw, 4.5rem);
  background: linear-gradient(160deg, var(--wine) 0%, var(--wine-deep) 100%);
  color: var(--ivory);
  overflow: hidden;
}

.page-about .about-next::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    115deg,
    rgba(200, 161, 90, .07) 0 2px,
    rgba(200, 161, 90, 0) 2px 26px
  );
  pointer-events: none;
}

.page-about .about-next > .wrap {
  position: relative;
  z-index: 1;
}

.page-about .about-next__grid {
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
}

.page-about .about-next__title {
  margin: .85rem 0 .9rem;
  max-width: 14em;
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(1.45rem, 2.9vw, 2.1rem);
  line-height: 1.38;
  color: #FFFFFF;
}

.page-about .about-next__lead {
  margin: 0;
  max-width: 32ch;
  font-size: .96rem;
  line-height: 1.88;
  color: rgba(247, 242, 234, .78);
}

.page-about .about-next__links {
  display: grid;
  gap: .55rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-next__link {
  display: grid;
  grid-template-columns: 2.4rem minmax(0, 1fr);
  grid-template-rows: auto auto;
  align-items: baseline;
  gap: .2rem .9rem;
  padding: 1rem 1.1rem;
  border: 1px solid rgba(200, 161, 90, .3);
  border-radius: var(--radius-sm);
  background: rgba(23, 20, 26, .2);
  text-decoration: none;
  color: inherit;
  transition: background .22s var(--ease), border-color .22s var(--ease), transform .22s var(--ease);
}

.page-about .about-next__link > .mono {
  grid-row: 1 / span 2;
  font-size: .82rem;
  letter-spacing: .06em;
  color: var(--gold);
}

.page-about .about-next__link:hover,
.page-about .about-next__link:focus-visible {
  background: rgba(200, 161, 90, .16);
  border-color: rgba(200, 161, 90, .62);
  transform: translateX(4px);
}

.page-about .about-next__label {
  font-family: var(--serif);
  font-size: 1.06rem;
  font-weight: 700;
  line-height: 1.4;
  color: #FFFFFF;
}

.page-about .about-next__hint {
  font-size: .86rem;
  line-height: 1.68;
  color: rgba(247, 242, 234, .72);
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

@media (min-width: 960px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    gap: clamp(2.5rem, 5vw, 4.5rem);
  }

  .page-about .about-next__grid {
    grid-template-columns: minmax(0, .82fr) minmax(0, 1.18fr);
    align-items: start;
    gap: clamp(2.5rem, 5vw, 4.5rem);
  }
}

@media (min-width: 1024px) {
  .page-about .about-rail {
    grid-template-columns: 13rem minmax(0, 1fr);
    align-items: start;
    gap: clamp(2.5rem, 5vw, 5rem);
  }

  .page-about .about-rail__side {
    display: block;
    position: sticky;
    top: calc(var(--masthead-h, 64px) + 2.5rem);
  }
}

@media (min-width: 1280px) {
  .page-about .about-chapter__body > p {
    font-size: 1.05rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-node,
  .page-about .about-node__summary::after,
  .page-about .about-fold__summary::after,
  .page-about .about-rail__item,
  .page-about .about-next__link {
    transition: none;
  }

  .page-about .about-next__link:hover,
  .page-about .about-next__link:focus-visible {
    transform: none;
  }
}
<<<END>>>