.page-about {
  --about-shadow: 0 1px 0 rgba(33, 25, 20, .04), 0 18px 36px -28px rgba(33, 25, 20, .5);
  --about-gap: clamp(26px, 3.6vw, 44px);
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  overflow-x: clip;
}

.page-about p {
  text-wrap: pretty;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(22px, 4vw, 40px) 0 clamp(32px, 5vw, 58px);
  background:
    radial-gradient(90% 70% at 88% 4%, rgba(201, 162, 39, .20), transparent 60%),
    radial-gradient(70% 80% at 4% 96%, rgba(140, 28, 28, .07), transparent 62%),
    linear-gradient(180deg, #FBF6EB 0%, var(--paper) 92%);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
  opacity: .6;
}

.page-about .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 13px;
  color: var(--grey-ink);
}

.page-about .breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--line-strong);
}

.page-about .breadcrumb a {
  color: var(--grey-ink);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .24s var(--ease), border-color .24s var(--ease);
}

.page-about .breadcrumb a:hover {
  color: var(--vermilion);
  border-bottom-color: var(--vermilion);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  margin-top: clamp(20px, 3vw, 34px);
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(38px, 7.2vw, 68px);
  line-height: 1.06;
  letter-spacing: .07em;
  color: var(--ink);
  margin: 10px 0 18px;
}

.page-about .about-hero__lede {
  max-width: 42em;
  font-size: 16.5px;
  line-height: 1.8;
  color: var(--ink-soft);
  margin: 0 0 14px;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.page-about .about-hero__aside {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--about-shadow);
}

.page-about .about-fact {
  display: flex;
  flex-direction: column;
  gap: 6px;
  background: var(--paper-raised);
  padding: 16px 15px 20px;
}

.page-about .about-fact__num {
  font-family: var(--font-display);
  font-size: clamp(22px, 3.2vw, 30px);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: .01em;
  color: var(--gold-deep);
}

.page-about .about-fact__label {
  font-size: 13px;
  line-height: 1.6;
  color: var(--grey-ink);
}

/* ---------- 章节目录 ---------- */
.page-about .about-toc {
  background: var(--paper-raised);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .about-toc__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 11px 0;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-about .about-toc__list::-webkit-scrollbar {
  display: none;
}

.page-about .about-toc__link {
  display: inline-block;
  white-space: nowrap;
  padding: 7px 14px;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  font-size: 14px;
  color: var(--ink-soft);
  text-decoration: none;
  transition: background .24s var(--ease), color .24s var(--ease), border-color .24s var(--ease);
}

.page-about .about-toc__link:hover,
.page-about .about-toc__link[aria-current="true"] {
  background: var(--crimson);
  border-color: var(--crimson);
  color: #F7EFE0;
}

/* ---------- 品牌沿革 ---------- */
.page-about .about-timeline-wrap {
  position: relative;
  margin-top: clamp(8px, 2vw, 20px);
}

.page-about .about-timeline-wrap__texture {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .12;
  border-radius: 10px;
  pointer-events: none;
}

.page-about .about-timeline {
  position: relative;
  z-index: 1;
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--about-gap);
}

.page-about .about-timeline__item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  scroll-margin-top: 96px;
}

.page-about .about-timeline__marker {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-top: 2px;
}

.page-about .about-timeline__year {
  font-family: var(--font-display);
  font-size: clamp(26px, 3.6vw, 38px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: .02em;
  color: var(--crimson);
}

.page-about .about-timeline__phase {
  font-size: 12px;
  letter-spacing: .24em;
  color: var(--grey-ink);
}

.page-about .about-timeline__card {
  position: relative;
  background: var(--paper-raised);
  border: 1px solid var(--line);
  border-left: 3px solid var(--gold);
  border-radius: var(--radius);
  padding: clamp(18px, 2.6vw, 26px);
  box-shadow: var(--about-shadow);
  transition: transform .3s var(--ease), box-shadow .3s var(--ease);
}

.page-about .about-timeline__card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lift);
}

.page-about .about-timeline__title {
  font-family: var(--font-display);
  font-size: clamp(18px, 2.2vw, 22px);
  font-weight: 700;
  line-height: 1.45;
  margin: 0 0 10px;
  color: var(--ink);
}

.page-about .about-timeline__text {
  margin: 0;
  max-width: 44em;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--ink-soft);
}

/* ---------- 折叠面板 ---------- */
.page-about .panel {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px dashed var(--line-strong);
}

.page-about .panel summary {
  display: flex;
  align-items: center;
  gap: 10px;
  list-style: none;
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
  color: var(--crimson);
}

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

.page-about .panel summary::after {
  content: "+";
  margin-left: auto;
  font-size: 17px;
  line-height: 1;
  color: var(--gold-deep);
}

.page-about .panel[open] summary::after {
  content: "–";
}

.page-about .panel__body {
  padding-top: 10px;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--grey-ink);
}

.page-about .panel__body p {
  margin: 0;
}

/* ---------- 合作生态（深色段） ---------- */
.page-about .about-suppliers {
  position: relative;
  overflow: hidden;
  background: linear-gradient(160deg, #2C2119 0%, var(--ink) 70%);
  color: #EFE4D0;
}

.page-about .about-suppliers::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(201, 162, 39, .28) 1px, transparent 1px);
  background-size: 22px 22px;
  opacity: .55;
  pointer-events: none;
  -webkit-mask-image: radial-gradient(120% 80% at 88% 8%, #000 0%, transparent 72%);
  mask-image: radial-gradient(120% 80% at 88% 8%, #000 0%, transparent 72%);
}

.page-about .about-suppliers .container {
  position: relative;
  z-index: 1;
}

.page-about .about-suppliers .eyebrow {
  color: var(--gold);
}

.page-about .about-suppliers .section-head__title {
  color: #F6EEDD;
}

.page-about .about-suppliers .section-head__desc {
  color: rgba(239, 228, 208, .78);
}

.page-about .about-suppliers .chapter-no {
  color: var(--gold);
  border-color: rgba(201, 162, 39, .5);
  background: rgba(201, 162, 39, .12);
}

.page-about .about-suppliers__body {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  margin-top: clamp(22px, 4vw, 38px);
}

.page-about .about-suppliers__figure {
  margin: 0;
  border: 1px solid rgba(201, 162, 39, .32);
  border-radius: var(--radius);
  overflow: hidden;
  background: #1A130E;
}

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

.page-about .about-suppliers__figure figcaption {
  padding: 12px 15px;
  font-size: 13px;
  line-height: 1.7;
  color: rgba(239, 228, 208, .66);
  border-top: 1px solid rgba(201, 162, 39, .2);
}

.page-about .about-vendor-types {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 22px;
  padding: 0;
  list-style: none;
}

.page-about .about-suppliers .tag--jade {
  color: #86CFBD;
  border-color: rgba(134, 207, 189, .5);
}

.page-about .about-suppliers .tag--orange {
  color: #F0A56A;
  border-color: rgba(240, 165, 106, .5);
}

.page-about .about-suppliers .tag--gold {
  color: #EACB79;
  border-color: rgba(234, 203, 121, .5);
}

.page-about .about-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 13px;
}

.page-about .about-steps__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 15px;
  padding: 16px 18px;
  border: 1px solid rgba(201, 162, 39, .22);
  border-radius: var(--radius);
  background: rgba(244, 236, 221, .05);
}

.page-about .about-steps__no {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--gold);
}

.page-about .about-steps__title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 16.5px;
  font-weight: 700;
  letter-spacing: .03em;
  color: #F6EEDD;
}

.page-about .about-steps__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: rgba(239, 228, 208, .75);
}

.page-about .about-suppliers__note {
  margin: 20px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(239, 228, 208, .7);
}

.page-about .about-suppliers__note a {
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid rgba(201, 162, 39, .5);
  transition: color .24s var(--ease), border-color .24s var(--ease);
}

.page-about .about-suppliers__note a:hover {
  color: #F0D485;
  border-bottom-color: #F0D485;
}

/* ---------- 内容线 ---------- */
.page-about .about-lines__grid {
  display: grid;
  gap: clamp(16px, 2.6vw, 26px);
  margin-top: clamp(22px, 4vw, 36px);
}

.page-about .about-line-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: clamp(20px, 2.6vw, 28px);
  background: var(--paper-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--about-shadow);
  overflow: hidden;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease);
}

.page-about .about-line-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
  background: var(--line-strong);
}

.page-about .about-line-card--jade::before {
  background: linear-gradient(90deg, var(--jade), rgba(46, 110, 99, .22));
}

.page-about .about-line-card--orange::before {
  background: linear-gradient(90deg, var(--amber-orange), rgba(217, 114, 43, .22));
}

.page-about .about-line-card--gold::before {
  background: linear-gradient(90deg, var(--gold), rgba(201, 162, 39, .22));
}

.page-about .about-line-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lift);
}

.page-about .about-line-card__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(18px, 2.2vw, 21px);
  line-height: 1.45;
  color: var(--ink);
}

.page-about .about-line-card__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-about .about-line-card__meta {
  margin: auto 0 0;
  padding-top: 14px;
  border-top: 1px dashed var(--line-strong);
  font-size: 13.5px;
  font-weight: 600;
  color: var(--gold-deep);
}

/* ---------- 团队与响应 ---------- */
.page-about .about-team__body {
  display: grid;
  gap: clamp(24px, 4vw, 42px);
  margin-top: clamp(22px, 4vw, 36px);
}

.page-about .about-team__roles {
  display: grid;
  gap: 18px;
}

.page-about .about-role {
  border-left: 2px solid var(--vermilion);
  padding: 2px 0 2px 16px;
}

.page-about .about-role__title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: .03em;
  color: var(--ink);
}

.page-about .about-role__text {
  margin: 0;
  font-size: 14.8px;
  line-height: 1.78;
  color: var(--grey-ink);
}

.page-about .about-team__figure {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--paper-raised);
  box-shadow: var(--about-shadow);
}

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

.page-about .about-team__figure figcaption {
  padding: 12px 16px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--grey-ink);
  border-top: 1px solid var(--line);
}

/* ---------- 运营主体 ---------- */
.page-about .about-entity {
  background: linear-gradient(180deg, var(--paper) 0%, #FBF6EB 100%);
  border-top: 1px solid var(--line);
}

.page-about .about-entity__grid {
  display: grid;
  gap: 14px;
  margin-top: clamp(22px, 4vw, 34px);
}

.page-about .about-entity__card {
  padding: 20px 18px;
  background: var(--paper-raised);
  border: 1px solid var(--line);
  border-top: 3px solid var(--crimson);
  border-radius: var(--radius);
  box-shadow: var(--about-shadow);
}

.page-about .about-entity__card h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 16.5px;
  font-weight: 700;
  letter-spacing: .05em;
  color: var(--crimson);
}

.page-about .about-entity__card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
  overflow-wrap: anywhere;
}

.page-about .about-entity__more {
  margin: 24px 0 0;
}

/* ---------- 延伸入口 ---------- */
.page-about .about-next {
  border-top: 1px solid var(--line);
}

.page-about .about-next__title {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-size: clamp(22px, 3vw, 28px);
  font-weight: 700;
  letter-spacing: .05em;
  color: var(--ink);
}

.page-about .about-next__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-next__link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 16px 18px;
  background: var(--paper-raised);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  color: var(--ink);
  font-size: 15.5px;
  text-decoration: none;
  transition: border-color .24s var(--ease), transform .24s var(--ease), box-shadow .24s var(--ease);
}

.page-about .about-next__link::after {
  content: "→";
  flex: none;
  color: var(--vermilion);
  font-size: 16px;
  transition: transform .24s var(--ease);
}

.page-about .about-next__link:hover {
  border-color: var(--vermilion);
  transform: translateY(-2px);
  box-shadow: var(--about-shadow);
}

.page-about .about-next__link:hover::after {
  transform: translateX(4px);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-team__roles {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 680px) {
  .page-about .about-entity__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

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

@media (min-width: 880px) {
  .page-about .about-timeline__item {
    grid-template-columns: 132px minmax(0, 1fr);
    gap: clamp(22px, 4vw, 52px);
  }

  .page-about .about-timeline__marker {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    padding-top: 6px;
  }

  .page-about .about-timeline__marker::before {
    content: "";
    position: absolute;
    left: 0;
    top: 50px;
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--paper);
    border: 2px solid var(--gold);
  }

  .page-about .about-timeline__marker::after {
    content: "";
    position: absolute;
    left: 4px;
    top: 66px;
    bottom: calc(-1 * var(--about-gap));
    width: 1px;
    background: linear-gradient(180deg, rgba(201, 162, 39, .85), rgba(201, 162, 39, .06));
  }

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

@media (min-width: 900px) {
  .page-about .about-lines__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-lines__grid > .about-line-card:nth-child(2) {
    margin-top: 22px;
  }

  .page-about .about-lines__grid > .about-line-card:nth-child(3) {
    margin-top: 44px;
  }
}

@media (min-width: 940px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr);
    align-items: start;
  }
}

@media (min-width: 960px) {
  .page-about .about-suppliers__body {
    grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr);
    align-items: start;
  }
}

@media (min-width: 980px) {
  .page-about .about-team__body {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    align-items: start;
  }
}

@media (min-width: 1040px) {
  .page-about .about-entity__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-timeline__item:nth-child(2n) .about-timeline__card {
    margin-inline-start: clamp(20px, 6%, 84px);
  }

  .page-about .about-timeline__item:nth-child(3n) .about-timeline__card {
    margin-inline-end: clamp(20px, 7%, 96px);
  }
}

@media (max-width: 400px) {
  .page-about .about-hero__aside {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-about .about-fact__num {
    font-size: 24px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
  }

  .page-about .about-timeline__card:hover,
  .page-about .about-line-card:hover,
  .page-about .about-next__link:hover {
    transform: none;
  }
}