.page-about {
  --about-gold-glow: rgba(232, 181, 68, 0.2);
  --about-violet-glow: rgba(139, 92, 246, 0.16);
  background: var(--c-bg);
  overflow-x: hidden;
}

/* ===== Hero ===== */
.page-about .about-hero {
  position: relative;
  padding: 28px 0 16px;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  pointer-events: none;
  background:
    radial-gradient(900px 300px at 80% 8%, var(--about-violet-glow), transparent 62%),
    radial-gradient(640px 260px at 8% 42%, var(--about-gold-glow), transparent 60%);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 90px;
  background-image:
    linear-gradient(120deg, transparent 0 46%, var(--about-gold-glow) 46% 48%, transparent 48% 58%, var(--about-violet-glow) 58% 61%, transparent 61% 74%, var(--about-gold-glow) 74% 77%, transparent 77%);
  background-size: 260px 90px;
  background-repeat: repeat-x;
  opacity: 0.5;
  pointer-events: none;
}

.page-about .about-hero .breadcrumb {
  position: relative;
  z-index: 1;
  margin-bottom: 20px;
}

.page-about .about-hero__content {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.page-about .about-hero .section-kicker {
  margin: 0 0 12px;
  color: var(--c-gold);
  font-family: var(--font-data);
  font-size: 0.875rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.page-about .about-hero h1 {
  margin: 0 0 16px;
  font-family: var(--font-head);
  font-size: 2rem;
  line-height: 1.2;
  color: var(--c-text);
  letter-spacing: 0.01em;
}

.page-about .about-hero__lead {
  margin: 0 0 24px;
  font-size: 1.0625rem;
  line-height: 1.75;
  color: var(--c-text-dim);
  max-width: 640px;
}

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

.page-about .about-hero__meta-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 12px 16px;
  background: var(--c-panel);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-md);
  min-width: 110px;
}

.page-about .about-hero__meta-num {
  font-family: var(--font-data);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--c-gold-bright);
}

.page-about .about-hero__meta-label {
  color: var(--c-text-faint);
  font-size: 0.8125rem;
}

.page-about .about-hero__figure {
  position: relative;
  z-index: 1;
  margin: 24px 0 0;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

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

.page-about .about-hero__anchor {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 24px;
}

.page-about .about-hero__anchor-link {
  padding: 8px 16px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--c-line);
  color: var(--c-text-dim);
  text-decoration: none;
  transition: border-color 0.2s ease, color 0.2s ease, background-color 0.2s ease;
}

.page-about .about-hero__anchor-link:hover,
.page-about .about-hero__anchor-link:focus-visible {
  border-color: var(--c-line-strong);
  color: var(--c-gold);
  background-color: rgba(232, 181, 68, 0.06);
}

/* ===== Story ===== */
.page-about .about-story {
  position: relative;
  padding-top: 32px;
  padding-bottom: 32px;
}

.page-about .about-story__layout {
  display: grid;
  gap: 28px;
  align-items: start;
}

.page-about .about-story__main {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.page-about .about-story__main p {
  margin: 0;
  color: var(--c-text-dim);
  line-height: 1.8;
}

.page-about .about-story__notice {
  margin-top: 4px;
}

.page-about .about-story__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 16px;
}

.page-about .about-story__stat {
  background: var(--c-panel);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-md);
  padding: 16px 12px;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .about-story__stat-num {
  font-family: var(--font-data);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--c-gold-bright);
}

.page-about .about-story__stat-label {
  color: var(--c-text-faint);
  font-size: 0.8125rem;
}

.page-about .about-story__aside {
  position: relative;
}

.page-about .about-story__card {
  background: var(--c-panel);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-lg);
  padding: 20px;
}

.page-about .about-story__card-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--c-line);
  margin-bottom: 8px;
  color: var(--c-text);
  font-family: var(--font-head);
  font-weight: 700;
}

.page-about .about-story__card-code {
  font-family: var(--font-data);
  font-size: 0.75rem;
  color: var(--c-text-faint);
  letter-spacing: 0.08em;
}

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

.page-about .about-story__row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  padding: 10px 0;
  border-bottom: 1px solid var(--c-line);
}

.page-about .about-story__row dt {
  color: var(--c-text-dim);
  font-size: 0.875rem;
}

.page-about .about-story__row dd {
  margin: 0;
  font-family: var(--font-data);
  color: var(--c-text);
  font-size: 0.9375rem;
  text-align: right;
}

.page-about .about-story__card-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.page-about .about-story__card-link {
  padding: 8px 14px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--c-line);
  color: var(--c-gold);
  text-decoration: none;
  font-size: 0.875rem;
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

.page-about .about-story__card-link:hover,
.page-about .about-story__card-link:focus-visible {
  background: rgba(232, 181, 68, 0.08);
  border-color: var(--c-line-strong);
}

/* ===== Milestone ===== */
.page-about .about-milestone {
  position: relative;
  padding-top: 32px;
  padding-bottom: 32px;
}

.page-about .about-milestone::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(800px 320px at 50% 0%, rgba(139, 92, 246, 0.08), transparent 68%);
  pointer-events: none;
}

.page-about .about-milestone__badge-wrap {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  max-width: 360px;
  margin: 0 auto 36px;
  text-align: center;
}

.page-about .about-milestone__badge {
  margin: 0;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  overflow: hidden;
  border: 1px solid var(--c-line-strong);
  box-shadow: 0 0 32px rgba(232, 181, 68, 0.12);
}

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

.page-about .about-milestone__note {
  margin: 0;
  color: var(--c-text-faint);
  font-size: 0.875rem;
  line-height: 1.7;
}

.page-about .about-timeline {
  position: relative;
  display: grid;
  gap: 18px;
  max-width: 760px;
  margin: 0 auto;
}

.page-about .about-timeline__item {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 14px;
  align-items: start;
}

.page-about .about-timeline__axis {
  position: relative;
  display: flex;
  justify-content: center;
  padding-top: 2px;
}

.page-about .about-timeline__node {
  position: relative;
  z-index: 1;
  width: 58px;
  height: 58px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--c-bg-deep);
  border: 2px solid var(--c-line-strong);
  color: var(--c-gold);
  font-family: var(--font-data);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-align: center;
  line-height: 1.1;
}

.page-about .about-timeline__item--current .about-timeline__node {
  background: var(--c-gold);
  border-color: var(--c-gold);
  color: var(--c-bg-deep);
  box-shadow: 0 0 0 8px rgba(232, 181, 68, 0.14);
}

.page-about .about-timeline__axis::after {
  content: "";
  position: absolute;
  top: 62px;
  bottom: -28px;
  left: 50%;
  width: 2px;
  transform: translateX(-50%);
  background: linear-gradient(to bottom, var(--c-line-strong), var(--c-line));
}

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

.page-about .about-timeline__details {
  background: var(--c-panel);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-lg);
  transition: border-color 0.25s ease;
}

.page-about .about-timeline__details[open] {
  border-color: var(--c-line-strong);
}

.page-about .about-timeline__summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding: 16px 18px;
  border-radius: var(--radius-lg);
  transition: background-color 0.2s ease;
}

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

.page-about .about-timeline__summary:hover,
.page-about .about-timeline__summary:focus-visible {
  background: rgba(139, 92, 246, 0.08);
}

.page-about .about-timeline__title {
  font-family: var(--font-head);
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--c-text);
}

.page-about .about-timeline__tag {
  padding: 2px 10px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-pill);
  color: var(--c-text-faint);
  font-size: 0.75rem;
}

.page-about .about-timeline__item--current .about-timeline__tag {
  border-color: var(--c-line-strong);
  color: var(--c-gold);
}

.page-about .about-timeline__hint {
  margin-left: auto;
  color: var(--c-text-faint);
  font-size: 0.8125rem;
}

.page-about .about-timeline__details[open] .about-timeline__hint::before {
  content: "收起";
}

.page-about .about-timeline__details:not([open]) .about-timeline__hint::before {
  content: "展开";
}

.page-about .about-timeline__content {
  border-top: 1px solid var(--c-line);
  padding: 16px 18px 20px;
  color: var(--c-text-dim);
  line-height: 1.7;
}

.page-about .about-timeline__content p {
  margin: 0 0 12px;
}

.page-about .about-timeline__facts {
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-timeline__facts li {
  position: relative;
  padding-left: 18px;
  color: var(--c-text-dim);
  font-size: 0.875rem;
}

.page-about .about-timeline__facts li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--c-gold);
  opacity: 0.8;
}

.page-about .about-timeline__tail {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 14px;
  margin: 0;
}

.page-about .about-timeline__tail-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--c-gold);
  justify-self: center;
  margin-top: 6px;
  box-shadow: 0 0 0 4px rgba(232, 181, 68, 0.15);
}

.page-about .about-timeline__tail p {
  margin: 0;
  color: var(--c-text-faint);
  font-size: 0.875rem;
  line-height: 1.7;
}

/* ===== Region ===== */
.page-about .about-region {
  position: relative;
  padding-top: 32px;
  padding-bottom: 32px;
}

.page-about .about-region::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(900px 380px at 20% 60%, rgba(139, 92, 246, 0.1), transparent 65%);
  pointer-events: none;
}

.page-about .about-region__layout {
  position: relative;
  display: grid;
  gap: 24px;
}

.page-about .about-region__figure {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--c-line);
}

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

.page-about .about-region__content {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.page-about .about-region__content p {
  margin: 0;
  color: var(--c-text-dim);
  line-height: 1.8;
}

.page-about .about-region__badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 6px;
}

.page-about .about-region__notice {
  margin-top: 8px;
}

.page-about .about-region__notice a {
  color: var(--c-gold);
}

/* ===== Vision ===== */
.page-about .about-vision {
  position: relative;
  padding-top: 32px;
  padding-bottom: 40px;
}

.page-about .about-vision::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(680px 280px at 50% 20%, rgba(232, 181, 68, 0.08), transparent 70%);
  pointer-events: none;
}

.page-about .about-vision__panel {
  position: relative;
  background: var(--c-panel);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-lg);
  padding: 28px 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.page-about .about-vision__panel .section-head {
  align-items: center;
  text-align: center;
}

.page-about .about-vision__lead {
  max-width: 640px;
  margin: 0 auto 24px;
  color: var(--c-text-dim);
  font-size: 1.0625rem;
  line-height: 1.7;
}

.page-about .about-vision__grid {
  display: grid;
  gap: 16px;
  width: 100%;
  margin-bottom: 24px;
}

.page-about .about-vision__item {
  background: var(--c-panel-2);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-md);
  padding: 20px;
  text-align: left;
}

.page-about .about-vision__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1px solid var(--c-line-strong);
  color: var(--c-gold);
  font-family: var(--font-data);
  font-size: 0.75rem;
  margin-bottom: 12px;
}

.page-about .about-vision__item h3 {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-size: 1.0625rem;
  color: var(--c-text);
}

.page-about .about-vision__item p {
  margin: 0;
  color: var(--c-text-dim);
  line-height: 1.7;
  font-size: 0.9375rem;
}

.page-about .about-vision__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}

/* ===== Tablet / Desktop ===== */
@media (min-width: 720px) {
  .page-about .about-hero h1 {
    font-size: 2.5rem;
  }

  .page-about .about-hero__content {
    max-width: 780px;
  }

  .page-about .about-story__layout {
    grid-template-columns: 1.3fr 0.7fr;
  }

  .page-about .about-milestone__badge-wrap {
    flex-direction: row;
    justify-content: center;
    text-align: left;
  }

  .page-about .about-region__layout {
    grid-template-columns: 1fr 1fr;
    align-items: center;
  }

  .page-about .about-vision__panel {
    padding: 40px 32px;
  }

  .page-about .about-vision__grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 960px) {
  .page-about .about-hero {
    padding-top: 40px;
  }

  .page-about .about-hero h1 {
    font-size: 3rem;
  }

  .page-about .about-hero__figure {
    margin-top: 32px;
  }

  .page-about .about-story {
    padding-top: 48px;
    padding-bottom: 48px;
  }

  .page-about .about-milestone {
    padding-top: 48px;
    padding-bottom: 48px;
  }

  .page-about .about-milestone__badge {
    width: 140px;
    height: 140px;
  }

  .page-about .about-region {
    padding-top: 48px;
    padding-bottom: 48px;
  }

  .page-about .about-vision {
    padding-top: 48px;
    padding-bottom: 56px;
  }

  .page-about .about-vision__lead {
    font-size: 1.125rem;
  }
}