/* ============ page-about 基础层 ============ */
.page-about {
  --page-bg: var(--ink-purple);
  --page-surface: var(--deep-purple);
  --page-surface-2: var(--royal-purple);
  --page-gold: var(--gold);
  --page-gold-soft: rgba(212, 175, 55, 0.28);
  --page-gold-line: rgba(212, 175, 55, 0.45);
  --page-blue: var(--neon-blue);
  --page-text: var(--mist-white);
  --page-muted: var(--steel-gray);
  position: relative;
  background-color: var(--page-bg);
  color: var(--page-text);
  overflow-x: hidden;
}
.page-about::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image:
    linear-gradient(rgba(212, 175, 55, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(212, 175, 55, 0.035) 1px, transparent 1px);
  background-size: 44px 44px;
  pointer-events: none;
  z-index: 0;
}
.page-about > * {
  position: relative;
  z-index: 1;
}
.page-about a {
  color: var(--page-blue);
  text-decoration: none;
  transition: color var(--transition-base);
}
.page-about a:hover,
.page-about a:focus-visible {
  color: var(--light-gold);
  text-decoration: underline;
  outline: none;
}

/* ============ 面包屑 ============ */
.page-about .about-breadcrumb {
  font-family: var(--mono-font);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--page-muted);
  margin-bottom: 18px;
}
.page-about .about-breadcrumb a {
  color: var(--page-gold);
}
.page-about .about-breadcrumb a:hover {
  color: var(--page-blue);
  text-decoration: none;
}
.page-about .about-breadcrumb__sep {
  margin: 0 8px;
  color: var(--page-gold-soft);
}
.page-about .about-breadcrumb [aria-current="page"] {
  color: var(--page-text);
}

/* ============ HERO ============ */
.page-about .about-hero {
  padding: 28px 0 42px;
  background:
    radial-gradient(ellipse at 82% 12%, rgba(91, 42, 134, 0.38) 0%, transparent 62%),
    linear-gradient(160deg, var(--page-bg) 0%, var(--page-surface) 55%, var(--page-surface-2) 125%);
  border-bottom: 1px solid var(--page-gold-soft);
}
.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  padding-top: 8px;
}
.page-about .about-hero__kicker {
  color: var(--page-gold);
  font-family: var(--mono-font);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 12px;
}
.page-about .about-hero__title {
  font-family: var(--title-font);
  font-size: clamp(1.7rem, 4.5vw, 2.8rem);
  font-weight: 700;
  line-height: 1.14;
  margin: 0 0 16px;
  letter-spacing: 0.01em;
  word-break: break-word;
}
.page-about .about-hero__lead {
  font-size: 1rem;
  line-height: 1.8;
  color: rgba(242, 234, 228, 0.82);
  margin: 0 0 22px;
  max-width: 58ch;
}
.page-about .about-hero__points {
  list-style: none;
  margin: 0 0 24px;
  padding: 0;
  display: grid;
  gap: 8px;
}
.page-about .about-hero__points li {
  position: relative;
  padding-left: 18px;
  font-size: 0.9rem;
  line-height: 1.6;
  color: rgba(242, 234, 228, 0.72);
}
.page-about .about-hero__points li::before {
  content: "·";
  position: absolute;
  left: 4px;
  color: var(--page-gold);
  font-weight: 700;
}
.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}
.page-about .about-hero__stat {
  border: 1px solid var(--page-gold-soft);
  background: rgba(18, 6, 31, 0.45);
  padding: 12px 10px;
  text-align: center;
}
.page-about .about-hero__stat-num {
  display: block;
  font-family: var(--mono-font);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--page-gold);
  line-height: 1.25;
}
.page-about .about-hero__stat-label {
  display: block;
  margin-top: 4px;
  font-size: 0.72rem;
  color: var(--page-muted);
  letter-spacing: 0.04em;
}
.page-about .about-hero__visual {
  position: relative;
}
.page-about .about-hero__figure {
  margin: 0;
  border: 1px solid var(--page-gold-soft);
  padding: 10px;
  background: rgba(42, 10, 74, 0.35);
  position: relative;
}
.page-about .about-hero__figure::before {
  content: "";
  position: absolute;
  inset: 6px;
  border: 1px dashed var(--page-gold-soft);
  pointer-events: none;
  z-index: 2;
}
.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  position: relative;
  z-index: 1;
}
.page-about .about-hero__figure figcaption {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  padding-top: 10px;
  font-family: var(--mono-font);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  color: var(--page-muted);
}
.page-about .about-hero__visual-note {
  margin: 12px 0 0;
  font-size: 0.75rem;
  color: var(--page-muted);
  border-left: 2px solid var(--page-blue);
  padding-left: 10px;
  line-height: 1.6;
}

/* ============ 页码索引 ============ */
.page-about .about-index {
  background: rgba(18, 6, 31, 0.75);
  border-bottom: 1px solid var(--page-gold-soft);
}
.page-about .about-index__nav {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
}
.page-about .about-index__link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 13px 8px;
  border-bottom: 1px solid rgba(212, 175, 55, 0.1);
  color: var(--page-text);
  text-decoration: none;
  font-size: 0.9rem;
  transition: background var(--transition-base), color var(--transition-base);
}
.page-about .about-index__link:last-child {
  border-bottom: 0;
}
.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  background: rgba(212, 175, 55, 0.08);
  color: var(--page-gold);
  text-decoration: none;
  outline: none;
}
.page-about .about-index__num {
  font-family: var(--mono-font);
  font-size: 0.7rem;
  color: var(--page-gold);
  letter-spacing: 0.06em;
}
.page-about .about-index__label {
  font-family: var(--title-font);
  font-weight: 600;
  letter-spacing: 0.04em;
}

/* ============ 通用章节 ============ */
.page-about .about-section {
  padding: 44px 0;
  border-bottom: 1px solid rgba(212, 175, 55, 0.1);
}
.page-about .about-section__header {
  position: relative;
  border-left: 3px solid var(--page-gold);
  padding-left: 16px;
  margin-bottom: 20px;
}
.page-about .about-section__header::after {
  content: "";
  position: absolute;
  left: -3px;
  bottom: -7px;
  width: 14px;
  height: 1px;
  background: var(--page-gold);
}
.page-about .about-section__header .about-corner {
  position: absolute;
  top: -8px;
  right: 0;
  font-family: var(--mono-font);
  font-size: 0.68rem;
  color: var(--page-gold-soft);
  letter-spacing: 0.1em;
}
.page-about .about-section__header .section-label {
  color: var(--page-gold);
  font-family: var(--mono-font);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin: 0 0 6px;
}
.page-about .about-section__title {
  font-family: var(--title-font);
  font-size: 1.65rem;
  font-weight: 700;
  line-height: 1.2;
  margin: 0;
}
.page-about .about-section__grid {
  display: none;
}
.page-about .about-section__intro {
  font-size: 0.95rem;
  line-height: 1.8;
  color: rgba(242, 234, 228, 0.78);
  max-width: 74ch;
  margin: 0 0 24px;
}

/* ============ 品牌档案 ============ */
.page-about .about-brand__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
}
.page-about .about-brand__text p {
  font-size: 0.94rem;
  line-height: 1.85;
  margin: 0 0 14px;
  color: rgba(242, 234, 228, 0.86);
}
.page-about .about-brand__list {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  display: grid;
  gap: 8px;
}
.page-about .about-brand__list li {
  position: relative;
  padding: 9px 12px 9px 30px;
  border-left: 2px solid var(--page-gold-soft);
  background: rgba(42, 10, 74, 0.3);
  font-size: 0.88rem;
  line-height: 1.6;
  color: rgba(242, 234, 228, 0.8);
}
.page-about .about-brand__list li::before {
  content: "✓";
  position: absolute;
  left: 10px;
  top: 9px;
  color: var(--page-gold);
  font-family: var(--mono-font);
  font-size: 0.78rem;
}
.page-about .about-brand__params {
  display: grid;
  gap: 1px;
  background: var(--page-gold-soft);
  border: 1px solid var(--page-gold-soft);
  margin: 0;
  align-self: start;
}
.page-about .about-brand__param {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  background: rgba(18, 6, 31, 0.94);
  padding: 12px 14px;
}
.page-about .about-brand__param dt {
  font-size: 0.78rem;
  color: var(--page-muted);
  flex-shrink: 0;
}
.page-about .about-brand__param dd {
  margin: 0;
  font-family: var(--mono-font);
  font-size: 0.8rem;
  text-align: right;
  color: var(--page-text);
  word-break: break-word;
}

/* ============ 发展里程碑 ============ */
.page-about .about-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 22px;
  padding: 12px 0;
  border-top: 1px solid var(--page-gold-soft);
  border-bottom: 1px solid var(--page-gold-soft);
}
.page-about .about-filters__btn {
  appearance: none;
  border: 1px solid var(--page-gold-soft);
  background: rgba(42, 10, 74, 0.4);
  color: var(--page-text);
  font-family: var(--mono-font);
  font-size: 0.78rem;
  padding: 7px 15px;
  cursor: pointer;
  letter-spacing: 0.04em;
  transition: border-color var(--transition-base), color var(--transition-base), background var(--transition-base);
}
.page-about .about-filters__btn:hover,
.page-about .about-filters__btn:focus-visible {
  border-color: var(--page-gold);
  color: var(--page-gold);
  outline: none;
}
.page-about .about-filters__btn.is-active {
  background: var(--page-gold);
  border-color: var(--page-gold);
  color: var(--page-bg);
  font-weight: 700;
}
.page-about .about-timeline {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-bottom: 20px;
}
.page-about .about-timeline__item {
  position: relative;
  background: linear-gradient(180deg, rgba(42, 10, 74, 0.72), rgba(18, 6, 31, 0.88));
  border: 1px solid var(--page-gold-soft);
  border-left: 3px solid var(--page-gold);
  padding: 22px 18px 20px;
  box-shadow: 4px 4px 0 rgba(212, 175, 55, 0.07);
}
.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  top: 14px;
  right: 12px;
  width: 20px;
  height: 20px;
  border-top: 1px solid var(--page-gold-soft);
  border-right: 1px solid var(--page-gold-soft);
}
.page-about .about-timeline__item[data-hidden="true"] {
  display: none;
}
.page-about .about-timeline__item--current {
  border-color: var(--page-gold);
  background: linear-gradient(180deg, rgba(91, 42, 134, 0.5), rgba(42, 10, 74, 0.88));
}
.page-about .about-timeline__head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}
.page-about .about-timeline__ver {
  font-family: var(--mono-font);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--page-gold);
  letter-spacing: 0.04em;
}
.page-about .about-timeline__date {
  font-family: var(--mono-font);
  font-size: 0.7rem;
  color: var(--page-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.page-about .about-timeline__item--current .about-timeline__date::after {
  content: " · CURRENT";
  color: var(--page-blue);
}
.page-about .about-timeline__title {
  font-family: var(--title-font);
  font-size: 1.22rem;
  margin: 0 0 8px;
}
.page-about .about-timeline__desc {
  font-size: 0.88rem;
  line-height: 1.75;
  color: rgba(242, 234, 228, 0.76);
  margin: 0;
}
.page-about .about-milestones__media {
  margin: 26px 0 10px;
}
.page-about .about-milestones__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--page-gold-soft);
  object-fit: cover;
}
.page-about .about-milestones__footnote {
  margin: 16px 0 0;
  padding: 12px 14px;
  border-left: 3px solid var(--page-blue);
  background: rgba(0, 194, 255, 0.04);
  font-size: 0.84rem;
  line-height: 1.7;
  color: rgba(242, 234, 228, 0.72);
}

/* ============ 标签体系 ============ */
.page-about .about-taxonomy__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}
.page-about .taxonomy-card {
  position: relative;
  background: rgba(42, 10, 74, 0.5);
  border: 1px solid var(--page-gold-soft);
  border-top: 2px solid var(--page-gold-soft);
  padding: 18px 12px 14px;
  transition: border-color var(--transition-base), background var(--transition-base);
}
.page-about .taxonomy-card:hover,
.page-about .taxonomy-card:focus-within {
  border-color: var(--page-gold);
  background: rgba(42, 10, 74, 0.66);
}
.page-about .taxonomy-card__index {
  position: absolute;
  top: 8px;
  right: 10px;
  font-family: var(--mono-font);
  font-size: 0.64rem;
  color: rgba(212, 175, 55, 0.45);
  letter-spacing: 0.06em;
}
.page-about .taxonomy-card__title {
  font-family: var(--title-font);
  font-size: 1rem;
  font-weight: 700;
  margin: 0 0 6px;
}
.page-about .taxonomy-card__desc {
  font-size: 0.8rem;
  line-height: 1.6;
  color: rgba(242, 234, 228, 0.7);
  margin: 0 0 10px;
}
.page-about .taxonomy-card__count {
  display: inline-block;
  border: 1px solid var(--page-gold-soft);
  padding: 2px 8px;
  font-family: var(--mono-font);
  font-size: 0.68rem;
  color: var(--page-gold);
  letter-spacing: 0.04em;
}
.page-about .about-taxonomy__note {
  margin-top: 20px;
  padding: 14px 16px;
  border: 1px dashed var(--page-gold-soft);
  background: rgba(18, 6, 31, 0.5);
  font-size: 0.85rem;
  line-height: 1.7;
  color: rgba(242, 234, 228, 0.78);
}

/* ============ 团队与审核 ============ */
.page-about .about-team__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}
.page-about .team-card {
  background: rgba(42, 10, 74, 0.5);
  border: 1px solid var(--page-gold-soft);
  padding: 18px 14px;
  position: relative;
}
.page-about .team-card__index {
  display: inline-block;
  font-family: var(--mono-font);
  font-size: 0.68rem;
  color: var(--page-gold);
  letter-spacing: 0.08em;
  margin-bottom: 8px;
  padding: 2px 7px;
  border: 1px solid var(--page-gold-soft);
}
.page-about .team-card__title {
  font-family: var(--title-font);
  font-size: 1rem;
  margin: 0 0 6px;
}
.page-about .team-card__desc {
  font-size: 0.82rem;
  line-height: 1.7;
  color: rgba(242, 234, 228, 0.72);
  margin: 0;
}
.page-about .about-team__review {
  margin-top: 18px;
  padding: 16px 18px;
  border-left: 3px solid var(--page-blue);
  background: rgba(0, 194, 255, 0.04);
}
.page-about .about-team__review h3 {
  font-family: var(--title-font);
  font-size: 1.05rem;
  margin: 0 0 6px;
}
.page-about .about-team__review p {
  font-size: 0.86rem;
  line-height: 1.75;
  color: rgba(242, 234, 228, 0.72);
  margin: 0;
}

/* ============ 荣誉与生态 ============ */
.page-about .about-ecosystem__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
}
.page-about .about-ecosystem__honors {
  display: grid;
  gap: 12px;
}
.page-about .honor-card {
  border: 1px solid var(--page-gold-soft);
  background: linear-gradient(135deg, rgba(91, 42, 134, 0.4), rgba(42, 10, 74, 0.75));
  padding: 22px 18px 18px;
  position: relative;
}
.page-about .honor-card__year {
  display: inline-block;
  font-family: var(--mono-font);
  font-size: 0.68rem;
  color: var(--page-blue);
  border: 1px solid rgba(0, 194, 255, 0.4);
  padding: 2px 8px;
  letter-spacing: 0.08em;
}
.page-about .honor-card h3 {
  font-family: var(--title-font);
  font-size: 1.16rem;
  margin: 14px 0 6px;
}
.page-about .honor-card p {
  font-size: 0.86rem;
  line-height: 1.75;
  color: rgba(242, 234, 228, 0.72);
  margin: 0;
}
.page-about .about-ecosystem__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}
.page-about .stat-block {
  background: rgba(18, 6, 31, 0.55);
  border: 1px solid var(--page-gold-soft);
  text-align: center;
  padding: 16px 8px;
}
.page-about .stat-block__num {
  display: block;
  font-family: var(--mono-font);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--page-gold);
  line-height: 1.2;
}
.page-about .stat-block__label {
  display: block;
  margin-top: 5px;
  font-size: 0.72rem;
  color: var(--page-muted);
  line-height: 1.4;
}
.page-about .about-ecosystem__map {
  margin-top: 24px;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  align-items: center;
}
.page-about .about-ecosystem__map-text h3 {
  font-family: var(--title-font);
  font-size: 1.2rem;
  margin: 0 0 8px;
}
.page-about .about-ecosystem__map-text p {
  font-size: 0.88rem;
  line-height: 1.75;
  color: rgba(242, 234, 228, 0.76);
  margin: 0 0 10px;
}
.page-about .about-ecosystem__figure {
  margin: 0;
  border: 1px solid var(--page-gold-soft);
  padding: 8px;
  background: rgba(42, 10, 74, 0.28);
}
.page-about .about-ecosystem__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .about-ecosystem__cta {
  margin-top: 24px;
  padding: 14px 16px;
  border-left: 3px solid var(--page-gold);
  background: rgba(212, 175, 55, 0.07);
  font-size: 0.86rem;
  line-height: 1.75;
  color: rgba(242, 234, 228, 0.8);
}

/* ============ 平板 / 桌面 ============ */
@media (min-width: 768px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-taxonomy__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-team__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-ecosystem__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-milestones__media img {
    max-height: 420px;
    object-fit: cover;
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: center;
  }
  .page-about .about-index__nav {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }
  .page-about .about-index__link {
    padding: 15px 10px;
    border-bottom: 0;
    border-right: 1px solid rgba(212, 175, 55, 0.1);
    justify-content: center;
  }
  .page-about .about-index__link:last-child {
    border-right: 0;
  }
  .page-about .about-section {
    padding: 60px 0;
  }
  .page-about .about-section__grid {
    display: inline-block;
    font-family: var(--mono-font);
    font-size: 0.66rem;
    color: var(--page-muted);
    margin-top: 8px;
    letter-spacing: 0.1em;
  }
  .page-about .about-brand__grid {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr);
    gap: 34px;
  }
  .page-about .about-timeline {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }
  .page-about .about-timeline__item {
    padding: 26px 22px 22px;
  }
  .page-about .about-taxonomy__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-ecosystem__grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    gap: 30px;
    align-items: start;
  }
  .page-about .about-ecosystem__map {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  }
  .page-about .about-brand__params {
    position: sticky;
    top: calc(var(--header-h) + 20px);
  }
}