.page-about {
  --about-ink-line: rgba(11, 13, 18, 0.12);
  --about-dark-line: rgba(248, 243, 231, 0.16);
  --about-body: #2a2f3d;
  background: var(--cloud);
  color: var(--ink);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-about .breadcrumbs {
  padding-top: 16px;
  padding-bottom: 16px;
}

.page-about .about-link {
  color: var(--red);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  color: var(--red-dark);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  color: var(--cloud);
  background:
    radial-gradient(120% 80% at 84% 4%, rgba(242, 181, 68, 0.22), transparent 60%),
    linear-gradient(160deg, var(--ink) 0%, var(--indigo) 58%, #1a1030 100%);
  padding: clamp(28px, 5vw, 52px) 0 clamp(42px, 6vw, 84px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  z-index: 0;
  left: 38%;
  right: -20%;
  bottom: -52%;
  height: 122%;
  background: linear-gradient(135deg, var(--red) 0%, var(--red-dark) 54%, var(--red-deep) 100%);
  transform: rotate(-16deg);
  border-radius: 42% 0 0 0;
  opacity: 0.88;
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background-image: repeating-linear-gradient(115deg, rgba(248, 243, 231, 0.055) 0 1px, transparent 1px 24px);
  pointer-events: none;
}

.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 5vw, 44px);
}

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

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(34px, 7vw, 68px);
  line-height: 1.08;
  letter-spacing: -0.01em;
  margin: 14px 0 0;
}

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

.page-about .about-hero__lede {
  margin: 20px 0 0;
  max-width: 42ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: var(--on-dark);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

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

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-radius: var(--radius);
  clip-path: polygon(0 0, 100% 7%, 100% 100%, 0 93%);
  box-shadow: 0 26px 60px rgba(11, 13, 18, 0.45);
}

.page-about .about-hero__figure figcaption {
  margin-top: 12px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--on-dark-soft);
}

.page-about .about-hero__vert {
  display: none;
  writing-mode: vertical-rl;
  letter-spacing: 0.34em;
  font-family: var(--font-latin);
  font-size: 11px;
  color: rgba(248, 243, 231, 0.55);
  margin: 0;
}

/* ---------- 章节骨架 ---------- */
.page-about .about-chapter {
  position: relative;
  padding: clamp(46px, 7vw, 88px) 0;
}

.page-about .about-chapter--dark {
  color: var(--cloud);
  background: linear-gradient(162deg, var(--ink) 0%, var(--indigo) 70%, #17143a 100%);
}

.page-about .about-chapter__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(16px, 2.6vw, 26px);
}

.page-about .about-chapter__index {
  margin: 0;
  font-family: var(--font-latin);
  font-weight: 700;
  font-size: 12px;
  letter-spacing: 0.32em;
  color: var(--red);
}

.page-about .about-chapter--dark .about-chapter__index {
  color: var(--gold);
}

.page-about .about-chapter__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 3.6vw, 42px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin: 8px 0 0;
}

.page-about .about-chapter__lead {
  margin: 0;
  max-width: 44ch;
  font-size: clamp(15.5px, 1.7vw, 17.5px);
  line-height: 1.85;
  color: var(--about-body);
}

.page-about .about-chapter--dark .about-chapter__lead {
  color: var(--on-dark);
}

.page-about .about-chapter__side {
  border-top: 1px solid var(--about-ink-line);
  padding-top: 14px;
}

.page-about .about-chapter--dark .about-chapter__side {
  border-top-color: var(--about-dark-line);
}

.page-about .about-side-note {
  margin: 0;
  font-size: 12.5px;
  line-height: 1.9;
  color: var(--scale);
}

.page-about .about-chapter--dark .about-side-note {
  color: var(--on-dark-soft);
}

/* ---------- 品牌主张 ---------- */
.page-about .about-values {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
}

.page-about .about-values__item {
  padding: 18px 0 18px 20px;
  border-left: 2px solid rgba(215, 38, 46, 0.28);
  border-bottom: 1px solid var(--about-ink-line);
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-about .about-values__item:hover,
.page-about .about-values__item:focus-within {
  border-left-color: var(--red);
  background: rgba(215, 38, 46, 0.045);
}

.page-about .about-values__k {
  display: block;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 21px;
  letter-spacing: 0.06em;
  color: var(--red);
}

.page-about .about-values__item p {
  margin: 8px 0 0;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--about-body);
}

/* ---------- 运营根基 ---------- */
.page-about .about-base__figure {
  margin: clamp(24px, 3vw, 32px) 0 0;
}

.page-about .about-base__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
  border-radius: var(--radius);
  clip-path: polygon(0 4%, 100% 0, 100% 96%, 0 100%);
}

.page-about .about-base__figure figcaption {
  margin-top: 12px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--on-dark-soft);
}

.page-about .about-base__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 32px);
  margin-top: clamp(24px, 3vw, 34px);
  padding-top: 22px;
  border-top: 1px solid var(--about-dark-line);
}

.page-about .about-base__address {
  font-style: normal;
  font-size: 15px;
  line-height: 1.9;
  color: var(--cloud);
}

.page-about .about-base__label {
  display: block;
  font-family: var(--font-latin);
  font-size: 11.5px;
  letter-spacing: 0.24em;
  color: var(--gold);
  margin-bottom: 6px;
}

.page-about .about-base__hint {
  display: block;
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.8;
  color: var(--on-dark-soft);
}

.page-about .about-base__stats {
  margin: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 14px;
}

.page-about .about-base__stat {
  padding: 12px 14px;
  background: rgba(248, 243, 231, 0.05);
  border-left: 2px solid rgba(242, 181, 68, 0.55);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.page-about .about-base__stat dt {
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--on-dark-soft);
}

.page-about .about-base__stat dd {
  margin: 6px 0 0;
  font-family: var(--font-latin);
  font-weight: 700;
  font-size: 20px;
  line-height: 1.2;
  color: var(--gold);
}

/* ---------- 时间轴 ---------- */
.page-about .about-journey__figure {
  margin: 0 0 clamp(26px, 3vw, 38px);
}

.page-about .about-journey__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
  border-radius: var(--radius);
}

.page-about .about-journey__figure figcaption {
  margin-top: 12px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--scale);
}

.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
}

.page-about .about-timeline__item {
  position: relative;
  padding: 26px 0 0;
  border-top: 1px solid var(--about-ink-line);
  outline: none;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  top: -7px;
  left: 0;
  width: 13px;
  height: 13px;
  background: var(--red);
  border-radius: 3px 9px 3px 9px;
  transform: rotate(45deg);
  transition: background 0.2s var(--ease), transform 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.page-about .about-timeline__item:hover::before,
.page-about .about-timeline__item:focus-visible::before {
  background: var(--gold);
  transform: rotate(45deg) scale(1.25);
  box-shadow: 0 0 0 5px rgba(242, 181, 68, 0.22);
}

.page-about .about-timeline__item:focus-visible {
  border-top-color: var(--gold);
}

.page-about .about-timeline__year {
  display: inline-block;
  font-family: var(--font-latin);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0.18em;
  color: var(--red);
  padding: 2px 8px;
  border: 1px solid rgba(215, 38, 46, 0.3);
  border-radius: 999px;
}

.page-about .about-timeline__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  line-height: 1.35;
  margin: 12px 0 0;
}

.page-about .about-timeline__text {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--about-body);
}

.page-about .about-timeline__extra {
  margin: 0;
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  font-size: 13px;
  line-height: 1.8;
  color: var(--red-dark);
  border-left: 2px solid rgba(242, 181, 68, 0.6);
  padding-left: 0;
  transition: max-height 0.24s var(--ease), opacity 0.24s var(--ease), margin 0.24s var(--ease), padding 0.24s var(--ease);
}

.page-about .about-timeline__item:hover .about-timeline__extra,
.page-about .about-timeline__item:focus .about-timeline__extra,
.page-about .about-timeline__item:focus-within .about-timeline__extra {
  max-height: 140px;
  opacity: 1;
  margin-top: 12px;
  padding-left: 12px;
}

/* ---------- 服务协同组 ---------- */
.page-about .about-regions {
  margin-top: 26px;
  display: grid;
  gap: 10px;
}

.page-about .about-region {
  background: rgba(248, 243, 231, 0.05);
  border: 1px solid var(--about-dark-line);
  border-radius: var(--radius-sm);
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-about .about-region[open] {
  border-color: rgba(242, 181, 68, 0.45);
  background: rgba(248, 243, 231, 0.08);
}

.page-about .about-region__summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 16px;
  cursor: pointer;
  list-style: none;
  color: var(--cloud);
  font-size: 15.5px;
}

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

.page-about .about-region__summary:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

.page-about .about-region__tag {
  flex: none;
  background: var(--red);
  color: var(--cloud);
}

.page-about .about-region__name {
  flex: 1;
  font-weight: 600;
}

.page-about .about-region__sign {
  flex: none;
  position: relative;
  width: 14px;
  height: 14px;
}

.page-about .about-region__sign::before,
.page-about .about-region__sign::after {
  content: "";
  position: absolute;
  background: var(--gold);
  transition: transform 0.2s var(--ease);
}

.page-about .about-region__sign::before {
  top: 6px;
  left: 0;
  width: 14px;
  height: 2px;
}

.page-about .about-region__sign::after {
  top: 0;
  left: 6px;
  width: 2px;
  height: 14px;
}

.page-about .about-region[open] .about-region__sign::after {
  transform: scaleY(0);
}

.page-about .about-region__panel {
  padding: 0 16px 18px;
}

.page-about .about-region__panel p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--on-dark);
}

.page-about .about-region__list {
  margin: 12px 0 0;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.9;
  color: var(--on-dark-soft);
}

/* ---------- 资质荣誉 ---------- */
.page-about .about-honors {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-honor {
  position: relative;
  display: inline-flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0;
  padding: 10px 16px;
  border: 1px solid rgba(215, 38, 46, 0.28);
  border-radius: 999px;
  background: rgba(215, 38, 46, 0.04);
  outline: none;
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.page-about .about-honor:hover,
.page-about .about-honor:focus {
  border-color: var(--gold);
  background: rgba(242, 181, 68, 0.12);
  box-shadow: 0 6px 18px rgba(11, 13, 18, 0.08);
}

.page-about .about-honor:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
}

.page-about .about-honor__label {
  font-size: 14px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--ink);
}

.page-about .about-honor__tip {
  position: absolute;
  left: 0;
  top: calc(100% + 8px);
  width: 236px;
  z-index: 6;
  padding: 10px 12px;
  font-size: 12.5px;
  font-weight: 400;
  line-height: 1.7;
  color: var(--cloud);
  background: var(--ink);
  border-radius: var(--radius-sm);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px);
  transition: opacity 0.2s var(--ease), transform 0.2s var(--ease), visibility 0.2s var(--ease);
}

.page-about .about-honor:hover .about-honor__tip,
.page-about .about-honor:focus .about-honor__tip {
  opacity: 1;
  visibility: visible;
  transform: none;
}

/* ---------- 合作生态 ---------- */
.page-about .about-eco {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 2px;
}

.page-about .about-eco__item {
  padding: 18px 16px;
  background: rgba(248, 243, 231, 0.05);
  border-top: 2px solid rgba(244, 122, 42, 0.6);
}

.page-about .about-eco__item:nth-child(even) {
  border-top-color: rgba(31, 169, 138, 0.6);
}

.page-about .about-eco__num {
  display: block;
  font-family: var(--font-latin);
  font-weight: 700;
  font-size: 22px;
  line-height: 1.2;
  color: var(--gold);
}

.page-about .about-eco__desc {
  display: block;
  margin-top: 8px;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--on-dark);
}

.page-about .about-eco__foot {
  margin: 22px 0 0;
  font-size: 14.5px;
  line-height: 1.9;
  color: var(--on-dark);
}

.page-about .about-chapter--dark .about-link {
  color: var(--gold);
}

/* ---------- 收束 ---------- */
.page-about .about-cta {
  position: relative;
  overflow: hidden;
  background: var(--cloud);
  padding: clamp(46px, 7vw, 84px) 0;
  border-top: 1px solid var(--about-ink-line);
}

.page-about .about-cta::before {
  content: "";
  position: absolute;
  right: -12%;
  top: -40%;
  width: 52%;
  height: 180%;
  background: linear-gradient(150deg, rgba(215, 38, 46, 0.12), rgba(242, 181, 68, 0.16));
  transform: rotate(-15deg);
  pointer-events: none;
}

.page-about .about-cta__inner {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3vw, 36px);
  align-items: end;
}

.page-about .about-cta__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 4vw, 44px);
  line-height: 1.18;
  margin: 8px 0 0;
  color: var(--ink);
}

.page-about .about-cta__lede {
  margin: 14px 0 0;
  max-width: 46ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--about-body);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-about .about-base__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  }
}

@media (min-width: 860px) {
  .page-about .about-chapter__grid {
    grid-template-columns: 56px minmax(0, 7fr) minmax(0, 300px);
    column-gap: clamp(20px, 3vw, 44px);
    align-items: start;
  }

  .page-about .about-chapter__index {
    grid-column: 1;
    grid-row: 1 / span 4;
    writing-mode: vertical-rl;
    border-left: 2px solid rgba(215, 38, 46, 0.32);
    padding-left: 10px;
    margin-top: 4px;
  }

  .page-about .about-chapter--dark .about-chapter__index {
    border-left-color: rgba(242, 181, 68, 0.42);
  }

  .page-about .about-chapter__head,
  .page-about .about-chapter__body {
    grid-column: 2;
  }

  .page-about .about-chapter__side {
    grid-column: 3;
  }

  .page-about .about-chapter__side--vert .about-side-note {
    writing-mode: vertical-rl;
    letter-spacing: 0.16em;
    max-height: 260px;
  }

  .page-about .about-regions {
    gap: 12px;
  }

  .page-about .about-honor {
    border-radius: var(--radius-sm);
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 58fr) minmax(0, 34fr) 22px;
    align-items: end;
  }

  .page-about .about-hero__vert {
    display: block;
    justify-self: end;
    align-self: stretch;
    text-align: right;
  }
}

@media (min-width: 820px) {
  .page-about .about-timeline {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: clamp(20px, 3vw, 38px);
  }
}

@media (max-width: 819px) {
  .page-about .about-timeline__extra {
    max-height: none;
    opacity: 1;
    margin-top: 12px;
    padding-left: 12px;
  }
}

@media (max-width: 619px) {
  .page-about .about-honors {
    flex-direction: column;
    align-items: stretch;
  }

  .page-about .about-honor {
    border-radius: var(--radius-sm);
  }

  .page-about .about-honor__tip {
    position: static;
    width: auto;
    opacity: 1;
    visibility: visible;
    transform: none;
    margin-top: 8px;
    background: rgba(11, 13, 18, 0.06);
    color: var(--about-body);
  }

  .page-about .about-hero__actions .btn,
  .page-about .about-cta__actions .btn {
    flex: 1 1 auto;
    text-align: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-values__item,
  .page-about .about-timeline__item::before,
  .page-about .about-timeline__extra,
  .page-about .about-region,
  .page-about .about-honor,
  .page-about .about-honor__tip,
  .page-about .about-region__sign::before,
  .page-about .about-region__sign::after {
    transition: none;
  }
}