.page-about {
  background: var(--c-rice);
  color: var(--c-black);
  overflow-x: clip;
}

/* === 页头 hero === */
.page-about .about-hero {
  position: relative;
  background-color: var(--c-blue);
  color: var(--c-rice);
  padding: 2.5rem 0 3.5rem;
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--diag-lines);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--line-streak);
}

.page-about .about-hero .breadcrumb {
  margin-bottom: 2rem;
  position: relative;
  z-index: 1;
}

.page-about .breadcrumb a,
.page-about .breadcrumb li[aria-current="page"] {
  color: var(--c-rice);
  border-color: rgba(241, 250, 238, 0.3);
}

.page-about .about-hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  position: relative;
  z-index: 1;
}

.page-about .about-eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-yellow);
  background: rgba(244, 162, 97, 0.12);
  border: 1px solid rgba(244, 162, 97, 0.2);
  padding: 0.375rem 0.75rem;
  border-radius: var(--radius-sm);
  margin-bottom: 1rem;
}

.page-about .about-hero h1.page-title {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 900;
  color: var(--c-rice);
  line-height: 1.1;
  letter-spacing: 0.02em;
  margin-bottom: 1.25rem;
  max-width: 12em;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.18);
}

.page-about .about-hero .page-intro {
  font-size: 1.0625rem;
  line-height: 1.7;
  color: rgba(241, 250, 238, 0.82);
  max-width: 36em;
  margin-bottom: 1.5rem;
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.page-about .about-hero-actions .btn {
  padding: 0.625rem 1.125rem;
  font-weight: 600;
}

.page-about .btn--outline {
  border-color: rgba(241, 250, 238, 0.55);
  color: var(--c-rice);
}

.page-about .btn--outline:hover {
  background: rgba(241, 250, 238, 0.12);
  border-color: var(--c-rice);
}

.page-about .about-hero-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.875rem;
  align-content: end;
}

.page-about .hero-stat {
  background: rgba(17, 17, 17, 0.22);
  border: 1px solid rgba(241, 250, 238, 0.1);
  border-top: 3px solid var(--c-gold);
  padding: 0.875rem 1rem;
  transition: background-color 0.2s;
}

.page-about .hero-stat:hover {
  background: rgba(17, 17, 17, 0.36);
}

.page-about .stat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--c-gold);
  line-height: 1.2;
}

.page-about .stat-label {
  display: block;
  font-size: 0.7813rem;
  color: var(--c-gray);
  margin-top: 0.25rem;
  line-height: 1.4;
}

/* === 章节通用 === */
.page-about .about-section {
  padding: 3.5rem 0;
}

.page-about .about-milestones,
.page-about .about-credentials,
.page-about .about-local {
  padding-top: 4rem;
  padding-bottom: 4rem;
}

.page-about .section-head {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 2.5rem;
}

.page-about .section-index {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  color: var(--c-red);
  line-height: 1;
  white-space: nowrap;
  padding: 0.25rem 1rem 0.25rem 0;
  border-right: 3px solid var(--c-red);
}

.page-about .section-title-wrap h2 {
  font-size: 1.75rem;
  font-weight: 900;
  color: var(--c-black);
  margin-bottom: 0.25rem;
  line-height: 1.2;
}

.page-about .section-title-wrap p {
  font-size: 0.9375rem;
  color: var(--c-gray);
  line-height: 1.5;
}

.page-about .section-head--light h2 {
  color: var(--c-rice);
}

.page-about .section-head--light .section-title-wrap p {
  color: rgba(241, 250, 238, 0.66);
}

/* === 01 品牌故事 === */
.page-about .about-story {
  background: var(--c-rice);
}

.page-about .story-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.25rem;
  align-items: center;
}

.page-about .story-copy p {
  line-height: 1.7;
  font-size: 1rem;
  color: var(--c-black);
  margin-bottom: 1rem;
  padding: 0.875rem 1rem;
  background: rgba(255, 255, 255, 0.5);
  border-left: 4px solid var(--c-red);
  border-radius: var(--radius-sm);
}

.page-about .story-copy p:last-child {
  margin-bottom: 0;
}

.page-about .story-copy strong {
  font-weight: 700;
  color: var(--c-blue);
}

.page-about .story-figure {
  position: relative;
  padding: 0.75rem;
  margin: 0;
  border: 1px solid var(--c-mist);
  background: var(--c-rice);
  box-shadow: 8px 8px 0 rgba(141, 153, 174, 0.14), -4px -4px 0 rgba(212, 175, 55, 0.1);
}

.page-about .story-figure img {
  width: 100%;
  height: auto;
  display: block;
  max-width: 600px;
  object-fit: cover;
}

.page-about .story-figure figcaption {
  margin-top: 0.625rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--c-gray);
  text-align: center;
}

/* === 02 发展里程碑 === */
.page-about .about-milestones {
  position: relative;
  background: var(--c-blue);
  color: var(--c-rice);
}

.page-about .about-milestones::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--diag-lines);
}

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

.page-about .about-milestones .section-index {
  color: var(--c-yellow);
  border-right-color: var(--c-yellow);
}

.page-about .about-timeline {
  position: relative;
  padding: 0.75rem 0 0.25rem;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 0.6875rem;
  top: 1rem;
  bottom: 1rem;
  width: 3px;
  background: linear-gradient(180deg, var(--c-red) 0%, var(--c-yellow) 55%, var(--c-gold) 100%);
  opacity: 0.65;
  border-radius: 3px;
}

.page-about .tl-card {
  position: relative;
  margin: 0 0 1.75rem 2.25rem;
  padding: 1.25rem 1.375rem;
  background: rgba(17, 17, 17, 0.24);
  border: 1px solid rgba(241, 250, 238, 0.1);
  border-radius: var(--radius-md);
  transition: border-color 0.22s, background-color 0.22s, transform 0.22s;
}

.page-about .tl-card:last-child {
  margin-bottom: 0;
}

.page-about .tl-card:hover {
  border-color: var(--c-gold);
  background: rgba(17, 17, 17, 0.38);
  transform: translateY(-2px);
}

.page-about .tl-card:focus-within {
  border-color: var(--c-yellow);
  outline: 2px solid var(--c-yellow);
  outline-offset: 2px;
}

.page-about .tl-marker {
  position: absolute;
  left: -1.875rem;
  top: 1.375rem;
  width: 1.375rem;
  height: 1.375rem;
  border-radius: 50%;
  background: var(--c-blue);
  border: 3px solid var(--c-gold);
  box-shadow: 0 0 0 4px rgba(212, 175, 55, 0.18);
  z-index: 1;
}

.page-about .tl-point {
  display: block;
  width: 100%;
  height: 100%;
  border-radius: 50%;
}

.page-about .tl-body .badge {
  margin-bottom: 0.75rem;
}

.page-about .tl-body h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--c-rice);
  margin-bottom: 0.5rem;
  line-height: 1.3;
}

.page-about .tl-body p {
  font-size: 0.915rem;
  line-height: 1.68;
  color: rgba(241, 250, 238, 0.78);
  margin-bottom: 0;
}

.page-about .tl-figure {
  padding: 0.625rem;
}

.page-about .tl-figure img {
  width: 100%;
  max-width: 280px;
  height: auto;
  display: block;
  border-radius: var(--radius-sm);
  margin: 0 auto;
  object-fit: cover;
}

.page-about .tl-figure figcaption {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: rgba(241, 250, 238, 0.62);
  text-align: center;
  margin-top: 0.625rem;
}

/* === 03 资质荣誉 === */
.page-about .about-credentials {
  background: var(--c-mist);
}

.page-about .credential-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

.page-about .credential-card {
  background: var(--c-rice);
  border: 1px solid rgba(17, 17, 17, 0.08);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.2s;
}

.page-about .credential-card:hover {
  box-shadow: var(--shadow-md);
}

.page-about .credential-card summary {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem;
  cursor: pointer;
  border-radius: var(--radius-md);
  transition: background-color 0.2s;
}

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

.page-about .credential-card summary:hover {
  background: rgba(244, 162, 97, 0.08);
}

.page-about .credential-card summary:focus-visible {
  outline: 2px solid var(--c-yellow);
  outline-offset: -2px;
  border-radius: var(--radius-md);
}

.page-about .credential-stamp {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 3.75rem;
  height: 3.75rem;
  padding: 0 0.5rem;
  border: 2px solid var(--c-gold);
  border-radius: 50%;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--c-gold);
  background: rgba(212, 175, 55, 0.08);
  flex-shrink: 0;
}

.page-about .credential-info {
  display: flex;
  flex-direction: column;
  gap: 0.125rem;
  min-width: 0;
}

.page-about .credential-info strong {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--c-black);
}

.page-about .credential-info em {
  font-style: normal;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--c-gray);
}

.page-about .credential-detail {
  padding: 0 1.25rem 1.25rem 5.875rem;
}

.page-about .credential-detail p {
  font-size: 0.925rem;
  line-height: 1.65;
  color: var(--c-gray);
  border-top: 1px dashed var(--c-mist);
  padding-top: 0.75rem;
}

/* === 04 本地化承诺 === */
.page-about .about-local {
  position: relative;
  background: var(--c-black);
  color: var(--c-rice);
}

.page-about .about-local::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--diag-lines);
}

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

.page-about .about-local .section-index {
  color: var(--c-gold);
  border-right-color: var(--c-gold);
}

.page-about .local-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.25rem;
}

.page-about .local-map {
  margin: 0;
  padding: 0.625rem;
  border: 1px solid rgba(241, 250, 238, 0.12);
  background: rgba(17, 17, 17, 0.4);
  border-radius: var(--radius-md);
}

.page-about .local-map img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius-sm);
  object-fit: cover;
  max-width: 800px;
}

.page-about .local-map figcaption {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--c-gold);
  text-align: center;
  margin-top: 0.625rem;
}

.page-about .local-copy h3 {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--c-rice);
  margin-bottom: 0.875rem;
}

.page-about .local-copy > p {
  line-height: 1.7;
  color: rgba(241, 250, 238, 0.8);
  margin-bottom: 1.5rem;
}

.page-about .local-list {
  list-style: none;
  margin: 0 0 1.75rem;
  padding: 0;
}

.page-about .local-list li {
  display: flex;
  align-items: baseline;
  gap: 0.875rem;
  padding: 0.625rem 0;
  border-bottom: 1px solid rgba(241, 250, 238, 0.08);
}

.page-about .local-list-mark {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--c-yellow);
  background: rgba(244, 162, 97, 0.12);
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  flex-shrink: 0;
}

.page-about .local-list li span:last-child {
  font-size: 0.9375rem;
  color: rgba(241, 250, 238, 0.9);
  word-break: break-word;
}

.page-about .btn--gold {
  padding: 0.625rem 1.125rem;
  font-weight: 600;
}

/* === 平板断点 === */
@media (min-width: 720px) {
  .page-about .about-hero {
    padding-top: 3rem;
  }

  .page-about .about-hero-grid {
    grid-template-columns: 1fr;
    gap: 1.75rem;
  }

  .page-about .about-hero-stats {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-about .credential-grid {
    grid-template-columns: 1fr 1fr;
  }
}

/* === 桌面断点 === */
@media (min-width: 960px) {
  .page-about .about-hero {
    padding: 3.5rem 0 4.5rem;
  }

  .page-about .about-hero-grid {
    grid-template-columns: 7fr 5fr;
    align-items: end;
  }

  .page-about .about-section {
    padding: 4.5rem 0;
  }

  .page-about .section-head {
    gap: 1.25rem;
  }

  .page-about .section-index {
    font-size: 2.5rem;
  }

  .page-about .story-grid {
    grid-template-columns: 1fr 1fr;
  }

  .page-about .story-figure {
    margin-left: 1.25rem;
  }

  .page-about .about-timeline {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }

  .page-about .about-timeline::before {
    left: 50%;
    transform: translateX(-50%);
  }

  .page-about .tl-card {
    width: calc(100% - 3.5rem);
    margin: 0 0 2.25rem;
  }

  .page-about .tl-card:nth-child(odd) {
    grid-column: 1;
    justify-self: end;
    text-align: right;
  }

  .page-about .tl-card:nth-child(even) {
    grid-column: 2;
    justify-self: start;
  }

  .page-about .tl-marker {
    left: auto;
    right: -0.6875rem;
  }

  .page-about .tl-card:nth-child(even) .tl-marker {
    left: -0.6875rem;
    right: auto;
  }

  .page-about .tl-card:nth-child(odd).tl-figure {
    text-align: center;
  }

  .page-about .tl-figure img {
    max-width: 250px;
  }

  .page-about .local-layout {
    grid-template-columns: 6fr 5fr;
    align-items: center;
  }
}