/* ===== Page about — 品牌故事 ===== */
.page-about {
  --about-gold-deep: #8a6e00;
  --about-line: rgba(31, 41, 55, 0.14);
  --about-card-bg: #fcfbf6;
  background-color: var(--color-ivory);
  background-image: linear-gradient(rgba(10, 17, 40, 0.028) 1px, transparent 1px);
  background-size: 100% 8px;
  color: var(--color-ink);
  font-family: var(--font-body);
  line-height: 1.8;
  overflow-x: clip;
}

.page-about .page-about__container {
  padding-top: 2rem;
  padding-bottom: 1rem;
}

/* 面包屑 */
.page-about .page-about__breadcrumbs {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--color-mist);
  margin-bottom: 2.25rem;
  padding-top: 1rem;
}
.page-about .page-about__breadcrumbs a {
  color: var(--color-mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.25s, border-color 0.25s;
}
.page-about .page-about__breadcrumbs a:hover {
  color: var(--color-ink);
  border-color: var(--color-gold);
}

/* Hero */
.page-about .page-about__hero {
  position: relative;
  text-align: center;
  padding: 3.5rem 0.5rem 2.75rem;
  border-top: 3px solid var(--color-navy);
  border-bottom: 1px solid var(--about-line);
  margin-bottom: 2.5rem;
}
.page-about .page-about__hero::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 3rem;
  height: 3rem;
  border-top: 3px solid var(--color-gold);
  border-right: 3px solid var(--color-gold);
}
.page-about .page-about__hero::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -1px;
  transform: translateX(-50%);
  width: 12.5rem;
  height: 3px;
  background: linear-gradient(90deg, var(--color-gold) 0%, var(--color-cyan) 60%, var(--color-neon) 100%);
}
.page-about .page-about__hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--about-gold-deep);
  border: 1px solid var(--about-line);
  padding: 0.3rem 0.75rem;
  margin-bottom: 1.25rem;
}
.page-about .page-about__title {
  font-family: var(--font-sub);
  font-size: clamp(1.75rem, 4.5vw, 2.75rem);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: 0.02em;
  margin: 0 auto 1rem;
  max-width: 15em;
}
.page-about .page-about__lead {
  font-size: 1rem;
  line-height: 1.9;
  color: #4a5568;
  max-width: 38em;
  margin: 0 auto;
}
.page-about .page-about__hero-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem 1.5rem;
  margin-top: 1.75rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-mist);
}
.page-about .page-about__hero-meta-item {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}
.page-about .page-about__hero-meta-item::before {
  content: "◆";
  font-size: 0.5rem;
  color: var(--color-gold);
}

/* 目录 */
.page-about .page-about__toc {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.25rem 0;
  background: rgba(245, 240, 230, 0.92);
  backdrop-filter: blur(8px);
  border: 1px solid var(--about-line);
  padding: 0.4rem 0.75rem;
  margin-bottom: 3.5rem;
}
.page-about .page-about__toc-label {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-mist);
  padding-right: 0.75rem;
}
.page-about .page-about__toc-link {
  display: inline-block;
  padding: 0.3rem 0.75rem;
  font-size: 0.8125rem;
  text-decoration: none;
  letter-spacing: 0.06em;
  color: var(--color-ink);
  border-right: 1px solid var(--about-line);
  transition: color 0.2s, background 0.2s;
}
.page-about .page-about__toc-link:last-child {
  border-right: 0;
}
.page-about .page-about__toc-link:hover,
.page-about .page-about__toc-link.is-active {
  color: var(--about-gold-deep);
  background: rgba(242, 183, 5, 0.08);
}

/* 章节公版 */
.page-about .page-about__section {
  margin-top: 5.5rem;
  scroll-margin-top: 120px;
}
.page-about .page-about__section-head {
  margin-bottom: 2.5rem;
  padding-left: 1.25rem;
  border-left: 3px solid var(--color-gold);
}
.page-about .page-about__section-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--about-gold-deep);
  margin-bottom: 0.5rem;
}
.page-about .page-about__section-title {
  font-family: var(--font-sub);
  font-size: clamp(1.4rem, 2.6vw, 2rem);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: 0.02em;
  margin: 0 0 0.5rem;
}
.page-about .page-about__section-lead {
  font-size: 0.9375rem;
  color: #667085;
  line-height: 1.7;
  margin: 0;
  max-width: 36em;
}

/* 站内链接 */
.page-about .page-about__origin-copy a,
.page-about .page-about__timeline-content a,
.page-about .page-about__commitment-card a {
  color: var(--color-ink);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-decoration-color: rgba(138, 110, 0, 0.6);
  text-underline-offset: 3px;
  transition: color 0.2s, text-decoration-color 0.2s;
}
.page-about .page-about__origin-copy a:hover,
.page-about .page-about__timeline-content a:hover,
.page-about .page-about__commitment-card a:hover {
  color: var(--about-gold-deep);
  text-decoration-color: var(--color-gold);
}

/* 01 起源 */
.page-about .page-about__origin-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}
.page-about .page-about__origin-copy p {
  margin-bottom: 1rem;
}
.page-about .page-about__keyword {
  color: var(--color-navy);
  font-weight: 600;
}
.page-about .page-about__quote-card {
  position: relative;
  background: var(--color-navy);
  color: var(--color-ivory);
  margin: 0;
  padding: 2.25rem 1.75rem 1.75rem;
}
.page-about .page-about__quote-mark {
  position: absolute;
  top: 0.25rem;
  left: 1rem;
  font-family: var(--font-sub);
  font-size: 4.5rem;
  line-height: 1;
  color: var(--color-gold);
}
.page-about .page-about__quote-card blockquote {
  margin: 1.5rem 0 0.75rem;
  font-family: var(--font-sub);
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1.6;
}
.page-about .page-about__quote-source {
  font-size: 0.75rem;
  color: rgba(245, 240, 230, 0.55);
  margin: 0;
  font-family: var(--font-mono);
}

/* 02 里程碑 */
.page-about .page-about__milestone-frame {
  aspect-ratio: 12 / 5;
  border: 1px solid var(--about-line);
  background: var(--color-midnight);
  margin: 2.5rem 0 3rem;
  overflow: hidden;
}
.page-about .page-about__timeline-list {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}
.page-about .page-about__timeline-list::before {
  content: "";
  position: absolute;
  left: 0.5rem;
  top: 0.75rem;
  bottom: 0.75rem;
  width: 1px;
  background: linear-gradient(180deg, var(--color-gold), var(--about-line) 30%, var(--about-line) 80%, var(--color-cyan));
}
.page-about .page-about__timeline-item {
  position: relative;
  padding: 0 0 3rem 2.75rem;
}
.page-about .page-about__timeline-item:last-child {
  padding-bottom: 0;
}
.page-about .page-about__timeline-item::before {
  content: "";
  position: absolute;
  left: 0.5rem;
  top: 0.375rem;
  translate: -50% 0;
  width: 0.75rem;
  height: 0.75rem;
  background: var(--color-ivory);
  border: 2px solid var(--color-gold);
  border-radius: 50%;
}
.page-about .page-about__timeline-year {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: var(--color-navy);
  border-bottom: 2px dotted rgba(138, 110, 0, 0.5);
  padding-bottom: 0.15rem;
  margin-bottom: 0.5rem;
}
.page-about .page-about__timeline-content h3 {
  font-family: var(--font-sub);
  font-size: 1.05rem;
  font-weight: 700;
  margin: 0 0 0.5rem;
}
.page-about .page-about__timeline-content p {
  font-size: 0.9rem;
  line-height: 1.8;
  color: #4a5568;
  margin: 0;
  max-width: 52em;
}

/* 03 团队 */
.page-about .page-about__team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  margin-top: 2.5rem;
}
.page-about .page-about__team-figure {
  width: 100%;
  aspect-ratio: 3 / 4;
  margin: 0;
  border: 1px solid var(--about-line);
  overflow: hidden;
}
.page-about .page-about__team-list {
  display: grid;
  gap: 1.5rem;
}
.page-about .page-about__team-item {
  background: var(--about-card-bg);
  border: 1px solid var(--about-line);
  border-top: 3px solid var(--color-navy);
  padding: 1.5rem 1.75rem;
  transition: border-color 0.25s, transform 0.25s;
}
.page-about .page-about__team-item:hover {
  border-top-color: var(--color-gold);
  transform: translateY(-2px);
}
.page-about .page-about__team-num {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  color: var(--about-gold-deep);
  margin-bottom: 0.4rem;
}
.page-about .page-about__team-item h3 {
  font-family: var(--font-sub);
  font-size: 1.1rem;
  font-weight: 700;
  margin: 0 0 0.5rem;
}
.page-about .page-about__team-item p {
  font-size: 0.875rem;
  line-height: 1.75;
  color: #4a5568;
  margin: 0;
}
.page-about .page-about__team-scale {
  background: rgba(242, 183, 5, 0.08);
  border-left: 3px solid var(--color-gold);
  padding: 1rem 1.25rem;
  font-size: 0.875rem;
  line-height: 1.8;
  color: var(--color-navy);
  margin: 0;
}

/* 资质 */
.page-about .page-about__cert-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin-top: 3.5rem;
}
.page-about .page-about__cert-card {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin: 0;
  padding: 1.5rem;
  background: var(--about-card-bg);
  border: 1px solid var(--about-line);
  transition: transform 0.25s var(--ease-out), border-color 0.25s var(--ease-out), box-shadow 0.25s var(--ease-out);
}
.page-about .page-about__cert-media {
  aspect-ratio: 1 / 1;
  border: 1px solid var(--about-line);
}
.page-about .page-about__cert-card figcaption {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  font-size: 0.9375rem;
}
.page-about .page-about__cert-card figcaption strong {
  font-family: var(--font-sub);
  font-size: 1.05rem;
}
.page-about .page-about__cert-detail {
  font-size: 0.8125rem;
  color: var(--color-mist);
  line-height: 1.7;
  transition: color 0.25s;
}
.page-about .page-about__cert-card h3 {
  font-family: var(--font-sub);
  font-size: 1.1rem;
  font-weight: 700;
  margin: 0.5rem 0 0;
}
.page-about .page-about__cert-card p {
  font-size: 0.875rem;
  line-height: 1.75;
  color: #4a5568;
  margin: 0;
}
.page-about .page-about__cert-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 3rem;
  height: 3rem;
  border: 1px solid var(--color-navy);
  background: var(--color-ivory);
  font-family: var(--font-heading);
  font-size: 0.875rem;
  font-weight: 800;
  color: var(--color-navy);
  letter-spacing: 0.05em;
}

/* 04 承诺 */
.page-about .page-about__commitment {
  background: var(--color-navy);
  background-image:
    linear-gradient(rgba(242, 183, 5, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 229, 255, 0.04) 1px, transparent 1px);
  background-size: 100% 8px, 24px 100%;
  color: var(--color-ivory);
  margin-top: 6rem;
  padding: 4.5rem 0 5rem;
  position: relative;
  overflow: hidden;
}
.page-about .page-about__commitment::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-gold), var(--color-cyan), var(--color-neon), var(--color-gold));
  background-size: 200% 100%;
}
.page-about .page-about__section-head--light {
  border-left-color: var(--color-gold);
}
.page-about .page-about__section-head--light .page-about__section-num {
  color: var(--color-gold);
}
.page-about .page-about__section-head--light .page-about__section-title {
  color: var(--color-ivory);
}
.page-about .page-about__section-head--light .page-about__section-lead {
  color: rgba(245, 240, 230, 0.65);
}
.page-about .page-about__commitment-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin-top: 2.5rem;
}
.page-about .page-about__commitment-card {
  border: 1px solid rgba(245, 240, 230, 0.22);
  background: rgba(27, 42, 74, 0.55);
  padding: 2rem 1.75rem;
  position: relative;
  transition: transform 0.25s var(--ease-out), border-color 0.25s var(--ease-out);
}
.page-about .page-about__commitment-card::before {
  content: "";
  display: block;
  width: 2.5rem;
  height: 3px;
  background: linear-gradient(90deg, var(--color-gold), var(--color-neon));
  margin-bottom: 1.25rem;
}
.page-about .page-about__commitment-card h3 {
  font-family: var(--font-sub);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-ivory);
  margin: 0 0 0.75rem;
}
.page-about .page-about__commitment-card p {
  font-size: 0.9rem;
  line-height: 1.85;
  color: rgba(245, 240, 230, 0.8);
  margin: 0;
}
.page-about .page-about__commitment-card a {
  color: var(--color-cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.page-about .page-about__commitment-card a:hover {
  color: var(--color-gold);
}
.page-about .page-about__commitment-note {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(245, 240, 230, 0.15);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: rgba(245, 240, 230, 0.45);
  line-height: 1.8;
}

/* 媒体图片 */
.page-about .media-frame img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 桌面端增强 */
@media (min-width: 860px) {
  .page-about .page-about__toc {
    position: sticky;
    top: 96px;
    z-index: 30;
    width: fit-content;
  }
  .page-about .page-about__origin-grid {
    grid-template-columns: 7fr 5fr;
    gap: 3rem;
    align-items: start;
  }
  .page-about .page-about__team-grid {
    grid-template-columns: 2fr 3fr;
    gap: 3rem;
    align-items: start;
  }
  .page-about .page-about__cert-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .page-about .page-about__commitment-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .page-about .page-about__timeline-item {
    padding-left: 3rem;
  }
  .page-about .page-about__timeline-list::before {
    left: 0.75rem;
  }
  .page-about .page-about__timeline-item::before {
    left: 0.75rem;
  }
}

@media (hover: hover) {
  .page-about .page-about__cert-card:hover {
    transform: translateY(-3px);
    border-color: var(--color-gold);
    box-shadow: 3px 3px 0 rgba(242, 183, 5, 0.9);
  }
  .page-about .page-about__cert-card:hover .page-about__cert-detail {
    color: var(--color-ink);
  }
  .page-about .page-about__commitment-card:hover {
    border-color: rgba(242, 183, 5, 0.85);
    transform: translateY(-3px);
  }
}