.page-about {
  --about-navy: #0A1A2F;
  --about-gold: #C9A86A;
  --about-gold-soft: rgba(201, 168, 106, 0.14);
  --about-orange: #FF7A00;
  --about-muted: #6B7280;
  --about-line: #E5E2DA;
  --about-radius: 14px;
  overflow-x: hidden;
}

.page-about section[id] {
  scroll-margin-top: calc(var(--header-h) + 20px);
}

/* ===== Hero 分屏首屏 ===== */
.page-about .about-hero {
  position: relative;
  background: var(--about-navy);
  color: #fff;
  overflow: hidden;
}

.page-about .about-hero__bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
  z-index: 0;
}

.page-about .about-hero__bg img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  opacity: 0.28;
}

.page-about .about-hero__bg-shade {
  display: block;
  position: absolute;
  inset: 0;
  background: linear-gradient(115deg, rgba(10, 26, 47, 0.96) 0%, rgba(10, 26, 47, 0.82) 52%, rgba(10, 26, 47, 0.4) 100%);
}

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

.page-about .about-hero__crumb {
  padding-top: 22px;
  margin-bottom: 0;
}

.page-about .about-hero__crumb .breadcrumb-link {
  color: rgba(255, 255, 255, 0.6);
}

.page-about .about-hero__crumb .breadcrumb-item {
  color: rgba(255, 255, 255, 0.9);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  padding-top: 36px;
  padding-bottom: 64px;
}

.page-about .about-hero__overline {
  color: var(--about-gold);
  margin-bottom: 4px;
}

.page-about .about-hero__title {
  font-family: var(--font-serif);
  font-size: 40px;
  line-height: 1.2;
  color: #fff;
  margin: 16px 0 20px;
  max-width: 11em;
}

.page-about .about-hero__lead {
  color: rgba(255, 255, 255, 0.78);
  font-size: 16px;
  line-height: 1.8;
  margin-bottom: 24px;
  max-width: 34em;
}

.page-about .about-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 30px;
  margin-bottom: 28px;
}

.page-about .about-hero__meta-item {
  font-family: var(--font-mono);
  font-size: 12px;
  color: rgba(255, 255, 255, 0.55);
  display: inline-flex;
  flex-direction: column;
  gap: 5px;
}

.page-about .about-hero__meta-item strong {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-cyan);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.page-about .about-hero .btn-ghost {
  border-color: rgba(255, 255, 255, 0.45);
  color: #fff;
}

.page-about .about-hero__panel {
  display: flex;
  align-items: center;
}

/* ===== 数据面板 ===== */
.page-about .data-panel {
  width: 100%;
  background: #FBF9F4;
  border-radius: var(--about-radius);
  border: 1px solid rgba(255, 255, 255, 0.14);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
  overflow: hidden;
}

.page-about .data-panel__head {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 18px;
  background: var(--about-navy);
  color: rgba(255, 255, 255, 0.88);
  font-family: var(--font-mono);
  font-size: 12px;
}

.page-about .data-panel__title {
  flex: 1;
}

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

.page-about .data-panel__body {
  padding: 10px 10px 0;
  background: #F6F5F0;
}

.page-about .data-panel__svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .data-panel__ring {
  fill: none;
  stroke-width: 1.5;
}

.page-about .data-panel__ring--cyan {
  stroke: var(--color-cyan);
  fill: rgba(0, 229, 204, 0.07);
  stroke-dasharray: 4 4;
}

.page-about .data-panel__ring--gold {
  stroke: var(--about-gold);
  fill: rgba(201, 168, 106, 0.12);
}

.page-about .data-panel__ring--purple {
  stroke: var(--color-purple);
  fill: rgba(122, 92, 255, 0.09);
}

.page-about .data-panel__ring--orange {
  stroke: var(--about-orange);
  fill: rgba(255, 122, 0, 0.08);
}

.page-about .data-panel__link {
  stroke: #C8C4BC;
  stroke-width: 1;
  stroke-dasharray: 3 4;
}

.page-about .data-panel__num-primary {
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: 27px;
  fill: var(--about-navy);
}

.page-about .data-panel__unit-primary {
  font-family: var(--font-sans);
  font-size: 13px;
  fill: var(--about-muted);
}

.page-about .data-panel__num-secondary {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 15px;
  fill: var(--about-navy);
}

.page-about .data-panel__unit-secondary {
  font-family: var(--font-sans);
  font-size: 11px;
  fill: var(--about-muted);
}

.page-about .data-panel__foot {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 6px;
  padding: 12px 18px;
  background: #F6F5F0;
  border-top: 1px solid var(--about-line);
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--about-muted);
}

/* ===== 品牌简介 ===== */
.page-about .about-intro {
  background: var(--color-bg);
}

.page-about .about-intro__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  padding-top: 72px;
  padding-bottom: 72px;
}

.page-about .about-intro__aside {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}

.page-about .about-intro__index {
  font-family: var(--font-mono);
  font-size: 64px;
  font-weight: 700;
  line-height: 1;
  color: rgba(201, 168, 106, 0.35);
}

.page-about .about-intro__title {
  font-family: var(--font-serif);
  font-size: 28px;
  line-height: 1.35;
  color: var(--color-text);
  margin: 0 0 18px;
}

.page-about .about-intro__para {
  color: var(--color-muted);
  line-height: 1.85;
  margin-bottom: 16px;
  max-width: 46em;
}

.page-about .about-intro__footer {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
  margin-top: 28px;
}

.page-about .about-intro__note {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-muted);
}

/* ===== 关键数据一览 ===== */
.page-about .about-stats {
  background: var(--color-bg);
  border-top: 1px solid var(--about-line);
}

.page-about .about-stats__header {
  padding-top: 64px;
  padding-bottom: 36px;
}

.page-about .about-stats__lead {
  color: var(--color-muted);
  max-width: 36em;
}

.page-about .about-stats__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--about-line);
  border: 1px solid var(--about-line);
  border-radius: var(--about-radius);
  overflow: hidden;
  margin-bottom: 72px;
}

.page-about .about-stats__left,
.page-about .about-stats__right {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--about-line);
}

.page-about .about-stats__card {
  background: var(--color-bg);
  padding: 26px 24px;
}

.page-about .about-stats__card--prime {
  background: var(--about-navy);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  min-height: 220px;
}

.page-about .about-stats__card--wide {
  background: var(--about-gold-soft);
}

.page-about .about-stats__num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: 42px;
  line-height: 1.1;
  color: var(--about-navy);
  margin-bottom: 12px;
}

.page-about .about-stats__label {
  display: block;
  font-weight: 600;
  font-size: 15px;
  color: var(--color-text);
  margin-bottom: 8px;
}

.page-about .about-stats__desc {
  color: var(--color-muted);
  font-size: 13px;
  line-height: 1.6;
}

.page-about .about-stats__card--prime .about-stats__num,
.page-about .about-stats__card--prime .about-stats__label,
.page-about .about-stats__card--prime .about-stats__desc {
  color: #fff;
}

.page-about .about-stats__card--prime .about-stats__num {
  color: var(--color-cyan);
}

/* ===== 发展历程 ===== */
.page-about .about-timeline {
  background: var(--about-navy);
  color: rgba(255, 255, 255, 0.85);
  padding-top: 72px;
  padding-bottom: 80px;
  position: relative;
  overflow: hidden;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  top: -160px;
  right: -120px;
  width: 360px;
  height: 360px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(122, 92, 255, 0.18) 0%, rgba(122, 92, 255, 0) 70%);
  pointer-events: none;
}

.page-about .about-timeline .section-overline {
  color: var(--color-cyan);
  position: relative;
}

.page-about .about-timeline .section-title {
  color: #fff;
  position: relative;
}

.page-about .about-timeline__lead {
  color: rgba(255, 255, 255, 0.58);
  max-width: 38em;
  position: relative;
}

.page-about .about-timeline__header {
  padding-bottom: 56px;
}

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

.page-about .about-timeline__rail::before {
  content: "";
  position: absolute;
  left: 14px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--color-cyan) 0%, var(--about-gold) 50%, var(--about-orange) 100%);
}

.page-about .about-timeline__item {
  position: relative;
  padding-left: 44px;
  padding-bottom: 42px;
}

.page-about .about-timeline__item:last-child {
  padding-bottom: 0;
}

.page-about .about-timeline__mark {
  position: absolute;
  left: 4px;
  top: 8px;
  width: 20px;
  height: 20px;
  background: var(--color-cyan);
  border: 3px solid var(--about-navy);
  border-radius: 3px;
  transform: rotate(45deg);
  box-shadow: 0 0 0 2px rgba(0, 229, 204, 0.4);
}

.page-about .about-timeline__mark--current {
  background: var(--about-gold);
  box-shadow: 0 0 0 2px rgba(201, 168, 106, 0.45);
}

.page-about .about-timeline__card {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--about-radius);
  padding: 22px 24px;
}

.page-about .about-timeline__period {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 26px;
  color: var(--about-gold);
  margin-bottom: 6px;
}

.page-about .about-timeline__stage {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-cyan);
  padding: 4px 10px;
  border: 1px solid rgba(0, 229, 204, 0.3);
  border-radius: 999px;
  margin-bottom: 16px;
}

.page-about .about-timeline__card h3 {
  font-family: var(--font-serif);
  font-size: 20px;
  color: #fff;
  margin: 0 0 10px;
}

.page-about .about-timeline__card p {
  color: rgba(255, 255, 255, 0.62);
  line-height: 1.75;
  margin: 0;
  font-size: 14px;
}

.page-about .about-timeline__figure {
  margin: 64px 0 0;
  border: 1px solid rgba(201, 168, 106, 0.22);
  border-radius: var(--about-radius);
  overflow: hidden;
  background: rgba(255, 255, 255, 0.05);
}

.page-about .about-timeline__figure img {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-timeline__caption {
  padding: 12px 18px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: rgba(255, 255, 255, 0.55);
}

/* ===== 资质与认证 ===== */
.page-about .about-certifications {
  background: #FBFAF6;
}

.page-about .about-certifications__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
  padding-top: 80px;
  padding-bottom: 80px;
}

.page-about .about-certifications__lead {
  color: var(--about-muted);
  max-width: 34em;
}

.page-about .about-certifications__list {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-certifications__item {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 14px 16px;
  align-items: center;
  padding: 18px 20px;
  background: rgba(201, 168, 106, 0.09);
  border-left: 2px solid var(--about-gold);
  border-radius: 10px;
}

.page-about .about-certifications__mark {
  color: var(--about-gold);
  font-size: 14px;
}

.page-about .about-certifications__info strong {
  display: block;
  font-size: 16px;
  color: var(--color-text);
}

.page-about .about-certifications__info em {
  display: block;
  font-style: normal;
  font-size: 13px;
  color: var(--about-muted);
  margin-top: 4px;
}

.page-about .about-certifications__tag {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--about-navy);
  background: #fff;
  border: 1px solid var(--about-line);
  border-radius: 999px;
  padding: 5px 12px;
  white-space: nowrap;
}

.page-about .about-certifications__link {
  margin-top: 28px;
}

.page-about .about-certifications__visual {
  display: grid;
  gap: 20px;
  align-content: start;
}

.page-about .about-certifications__figure {
  margin: 0;
  border-radius: var(--about-radius);
  overflow: hidden;
  background: var(--about-line);
}

.page-about .about-certifications__figure img {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-certifications__console {
  background: var(--about-navy);
  border-radius: var(--about-radius);
  padding: 18px 20px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: rgba(255, 255, 255, 0.78);
  box-shadow: 0 18px 40px rgba(10, 26, 47, 0.18);
}

.page-about .about-certifications__console-head {
  display: flex;
  align-items: center;
  gap: 10px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  margin-bottom: 12px;
  color: var(--about-gold);
  font-size: 12px;
}

.page-about .about-certifications__console-head span:last-child {
  margin-left: auto;
  color: rgba(255, 255, 255, 0.4);
}

.page-about .about-certifications__console-body {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
  color: rgba(255, 255, 255, 0.65);
}

.page-about .about-certifications__console-body li::before {
  content: "› ";
  color: var(--color-cyan);
}

/* ===== 合作生态 ===== */
.page-about .about-ecosystem {
  background: var(--color-bg);
  border-top: 1px solid var(--about-line);
}

.page-about .about-ecosystem__header {
  padding-top: 72px;
  max-width: 720px;
}

.page-about .about-ecosystem__lead {
  color: var(--color-muted);
}

.page-about .about-ecosystem__board {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: 40px;
}

.page-about .about-ecosystem__tag {
  background: #fff;
  border: 1px solid var(--about-line);
  border-radius: 12px;
  padding: 20px 22px;
  outline: none;
  transition: border-color 0.3s var(--ease), box-shadow 0.3s var(--ease), transform 0.3s var(--ease);
}

.page-about .about-ecosystem__tag:hover,
.page-about .about-ecosystem__tag:focus-visible {
  border-color: var(--about-gold);
  box-shadow: 0 10px 30px rgba(10, 26, 47, 0.08);
  transform: translateY(-2px);
}

.page-about .about-ecosystem__label {
  display: block;
  font-weight: 700;
  font-size: 17px;
  color: var(--color-text);
  margin-bottom: 6px;
}

.page-about .about-ecosystem__detail {
  display: block;
  color: var(--about-muted);
  font-size: 14px;
  line-height: 1.7;
  max-height: 90px;
  opacity: 1;
}

.page-about .about-ecosystem__tag--wide {
  grid-column: auto;
}

.page-about .about-ecosystem__note {
  margin-top: 28px;
  font-size: 13px;
  color: var(--about-muted);
  line-height: 1.7;
}

/* ===== 平板 ===== */
@media (min-width: 760px) {
  .page-about .about-hero__title {
    font-size: 48px;
  }

  .page-about .about-intro__grid {
    grid-template-columns: 0.9fr 1.6fr;
    gap: 48px;
  }

  .page-about .about-intro__aside {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }

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

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

  .page-about .about-ecosystem__tag--wide {
    grid-column: span 2;
  }

  .page-about .about-certifications__visual {
    grid-template-columns: 1fr 1fr;
    align-items: start;
  }
}

/* ===== 桌面 ===== */
@media (min-width: 1024px) {
  .page-about .about-hero__grid {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 56px;
    padding-top: 48px;
    padding-bottom: 88px;
  }

  .page-about .about-hero__title {
    font-size: 56px;
    margin-top: 20px;
  }

  .page-about .about-hero__lead {
    font-size: 17px;
  }

  .page-about .about-intro__grid {
    padding-top: 96px;
    padding-bottom: 96px;
  }

  .page-about .about-intro__title {
    font-size: 34px;
  }

  .page-about .about-stats__grid {
    grid-template-columns: 1.1fr 0.9fr;
  }

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

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

  .page-about .about-timeline {
    padding-top: 96px;
    padding-bottom: 100px;
  }

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

  .page-about .about-timeline__item {
    width: 50%;
    padding: 0 52px 48px 0;
    text-align: right;
  }

  .page-about .about-timeline__item:nth-child(even) {
    margin-left: 50%;
    padding: 0 0 48px 52px;
    text-align: left;
  }

  .page-about .about-timeline__item .about-timeline__mark {
    left: auto;
    right: -11px;
  }

  .page-about .about-timeline__item:nth-child(even) .about-timeline__mark {
    right: auto;
    left: -11px;
  }

  .page-about .about-timeline__figure {
    max-width: 960px;
    margin-left: auto;
    margin-right: auto;
  }

  .page-about .about-certifications__grid {
    grid-template-columns: 1.05fr 0.95fr;
    gap: 64px;
    padding-top: 100px;
    padding-bottom: 100px;
  }

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

  .page-about .about-ecosystem__board {
    grid-template-columns: 1fr 1fr 1fr;
    gap: 16px;
    margin-top: 52px;
  }

  .page-about .about-ecosystem__tag--wide {
    grid-column: span 2;
  }

  .page-about .about-ecosystem__detail {
    max-height: 0;
    opacity: 0;
    margin-top: 0;
    transition: max-height 0.3s var(--ease), opacity 0.3s var(--ease), margin 0.3s var(--ease);
  }

  .page-about .about-ecosystem__tag:hover .about-ecosystem__detail,
  .page-about .about-ecosystem__tag:focus-visible .about-ecosystem__detail {
    max-height: 90px;
    opacity: 1;
    margin-top: 8px;
  }
}