.page-about {
  background: var(--ink-950);
  color: var(--paper);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-about :focus-visible {
  outline: 2px solid var(--lime-soft);
  outline-offset: 2px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(1.25rem, 4vw, 2.75rem) var(--gutter) clamp(2.25rem, 6vw, 4.25rem);
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(95% 70% at 88% -20%, rgba(198, 255, 74, 0.13), transparent 62%),
    radial-gradient(70% 60% at -10% 110%, rgba(232, 180, 90, 0.1), transparent 60%),
    linear-gradient(180deg, #05130f 0%, #0c2b22 62%, #071a14 100%);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(90deg, rgba(138, 148, 143, 0.08) 0 1px, transparent 1px 84px),
    repeating-linear-gradient(0deg, rgba(138, 148, 143, 0.06) 0 1px, transparent 1px 84px);
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.85), transparent 78%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.85), transparent 78%);
}

.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.5rem);
  max-width: var(--shell);
  margin-inline: auto;
}

.page-about .about-hero h1 {
  margin: 0.75rem 0 1rem;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.35rem, 8.4vw, 4.6rem);
  line-height: 0.98;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .about-hero__lede {
  max-width: 52ch;
  margin: 0;
  font-size: clamp(1rem, 2.4vw, 1.12rem);
  line-height: 1.8;
  color: rgba(242, 239, 230, 0.82);
}

.page-about .about-hero__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1.35rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-board {
  display: grid;
  gap: 0.85rem;
  padding: 1.15rem 1.25rem 1.3rem;
  border: 1px solid var(--line-strong);
  background: var(--glass);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
}

.page-about .about-board__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--gold);
}

.page-about .about-board__list {
  display: grid;
  gap: 0.7rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-board__row {
  display: grid;
  grid-template-columns: 2.6rem minmax(0, 1fr);
  gap: 0.7rem;
  align-items: baseline;
  padding-top: 0.7rem;
  border-top: 1px solid var(--line);
}

.page-about .about-board__row:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-about .about-board__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.35rem;
  line-height: 1;
  color: var(--lime);
}

.page-about .about-board__text {
  font-size: 0.86rem;
  line-height: 1.6;
  color: rgba(242, 239, 230, 0.76);
}

/* ---------- 索引 + 面板布局 ---------- */
.page-about .culture-layout {
  max-width: var(--shell);
  margin-inline: auto;
  padding: clamp(1.75rem, 5vw, 3.5rem) var(--gutter) clamp(3rem, 7vw, 5.5rem);
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.5rem);
}

.page-about .culture-index {
  border-bottom: 1px solid var(--line);
  padding-bottom: 0.5rem;
}

.page-about .culture-index__list {
  display: flex;
  gap: 0.5rem;
  margin: 0;
  padding: 0 0 0.15rem;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-about .culture-index__list::-webkit-scrollbar {
  display: none;
}

.page-about .culture-index__link {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  min-height: 44px;
  padding: 0.5rem 0.8rem;
  border: 1px solid var(--line);
  color: rgba(242, 239, 230, 0.82);
  font-size: 0.86rem;
  white-space: nowrap;
  text-decoration: none;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.page-about .culture-index__no {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--gold);
}

.page-about .culture-index__link:hover,
.page-about .culture-index__link:focus-visible {
  border-color: var(--lime);
  background: rgba(198, 255, 74, 0.08);
  color: var(--paper);
}

.page-about .culture-panels {
  display: grid;
  gap: clamp(2.75rem, 7vw, 5rem);
  min-width: 0;
}

.page-about .culture-panel {
  min-width: 0;
}

.page-about .culture-panel__head {
  display: flex;
  align-items: baseline;
  gap: 0.85rem;
  padding-bottom: 0.9rem;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--line);
}

.page-about .culture-panel__num {
  flex: none;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.5rem, 5vw, 2.2rem);
  line-height: 1;
  color: var(--lime);
}

.page-about .culture-panel__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.35rem, 4.4vw, 2rem);
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--paper);
}

/* ---------- 正文 ---------- */
.page-about .culture-prose {
  display: grid;
  gap: 1rem;
  max-width: 68ch;
  font-size: clamp(1rem, 2.2vw, 1.04rem);
  line-height: 1.82;
  color: rgba(242, 239, 230, 0.84);
}

.page-about .culture-prose--after {
  margin-top: 1.75rem;
}

.page-about .culture-prose p {
  margin: 0;
}

.page-about .culture-link {
  color: var(--lime-soft);
  text-decoration: none;
  border-bottom: 1px solid rgba(198, 255, 74, 0.45);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .culture-link:hover,
.page-about .culture-link:focus-visible {
  color: var(--lime);
  border-bottom-color: var(--lime);
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 0 0 1.5rem;
  min-width: 0;
}

.page-about .about-figure .media-frame {
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--ink-800);
  clip-path: polygon(0 22px, 100% 0, 100% 100%, 0 100%);
}

.page-about .about-figure .media-frame__img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

.page-about .about-figure--tall {
  margin-bottom: 0;
}

/* ---------- 时间线 ---------- */
.page-about .timeline {
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 0.6rem;
  bottom: 0.8rem;
  width: 1px;
  background: linear-gradient(180deg, var(--lime), var(--gold-deep));
  opacity: 0.55;
}

.page-about .timeline__item {
  position: relative;
  padding: 0 0 1.6rem 2.1rem;
}

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

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.3rem;
  width: 15px;
  height: 15px;
  border: 1px solid var(--lime);
  background: var(--ink-900);
  transform: rotate(45deg);
  transition: background-color 0.2s var(--ease), border-color 0.2s var(--ease), transform 0.2s var(--ease);
}

.page-about .timeline__item:hover::before,
.page-about .timeline__item:focus-within::before {
  background: var(--lime);
  border-color: var(--lime-soft);
  transform: rotate(45deg) scale(1.15);
}

.page-about .timeline__year {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.15rem, 3.6vw, 1.45rem);
  letter-spacing: 0.05em;
  color: var(--lime);
}

.page-about .timeline__title {
  margin: 0.2rem 0 0.35rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.04rem;
  color: var(--paper);
}

.page-about .timeline__text {
  margin: 0;
  max-width: 56ch;
  font-size: 0.94rem;
  line-height: 1.72;
  color: rgba(242, 239, 230, 0.76);
}

/* ---------- 团队 ---------- */
.page-about .role-grid {
  display: grid;
  gap: 1rem;
  margin-top: 1.5rem;
}

.page-about .role-card {
  position: relative;
  padding: 1.1rem 1.15rem 1.2rem;
  border: 1px solid var(--line);
  border-top: 2px solid var(--gold-deep);
  background: linear-gradient(160deg, rgba(18, 59, 48, 0.62), rgba(12, 43, 34, 0.9));
  transition: border-color 0.2s var(--ease), transform 0.24s var(--ease);
}

.page-about .role-card:hover {
  border-top-color: var(--lime);
  transform: translateY(-4px);
}

.page-about .role-card__no {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.page-about .role-card__title {
  margin: 0.35rem 0 0.5rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.1rem;
  color: var(--paper);
}

.page-about .role-card__text {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.72;
  color: rgba(242, 239, 230, 0.76);
}

/* ---------- 服务与合作 ---------- */
.page-about .reach-split {
  display: grid;
  gap: clamp(1.25rem, 3vw, 2rem);
  min-width: 0;
}

.page-about .stat-strip {
  display: grid;
  gap: 1px;
  margin: 1.85rem 0 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .stat-strip__item {
  display: grid;
  gap: 0.3rem;
  padding: 1rem 1.1rem;
  background: var(--ink-900);
}

.page-about .stat-strip__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.6rem, 5vw, 2.1rem);
  line-height: 1;
  color: var(--lime);
}

.page-about .stat-strip__label {
  font-size: 0.84rem;
  color: rgba(242, 239, 230, 0.7);
}

/* ---------- 品质标准 ---------- */
.page-about .standard-list {
  display: grid;
  gap: 1rem;
  margin: 0 0 1.85rem;
  padding: 0;
  list-style: none;
}

.page-about .standard-item {
  display: grid;
  grid-template-columns: 2.1rem minmax(0, 1fr);
  gap: 0.9rem;
  padding: 1rem 1.1rem 1.15rem;
  border: 1px solid var(--line);
  border-left: 2px solid var(--gold);
  background: rgba(12, 43, 34, 0.72);
  transition: border-left-color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.page-about .standard-item:hover {
  border-left-color: var(--lime);
  background: rgba(18, 59, 48, 0.78);
}

.page-about .standard-item__no {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.92rem;
  color: var(--lime);
}

.page-about .standard-item__title {
  margin: 0 0 0.4rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.04rem;
  color: var(--paper);
}

.page-about .standard-item__text {
  margin: 0;
  font-size: 0.93rem;
  line-height: 1.74;
  color: rgba(242, 239, 230, 0.78);
}

.page-about .contact-card {
  display: grid;
  gap: 0.9rem;
  padding: 1.25rem 1.2rem 1.35rem;
  border: 1px solid var(--line-strong);
  background: var(--glass);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  clip-path: polygon(0 0, calc(100% - 22px) 0, 100% 22px, 100% 100%, 0 100%);
}

.page-about .contact-card__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.page-about .contact-card__list {
  display: grid;
  gap: 0.55rem;
  margin: 0;
}

.page-about .contact-card__row {
  display: grid;
  gap: 0.15rem;
}

.page-about .contact-card__key {
  font-size: 0.78rem;
  color: var(--fog);
}

.page-about .contact-card__val {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.98rem;
  color: var(--paper);
  word-break: break-word;
}

.page-about .contact-card__note {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.7;
  color: rgba(242, 239, 230, 0.76);
}

.page-about .contact-card .btn {
  justify-self: start;
}

/* ---------- 响应式 ---------- */
@media (min-width: 560px) {
  .page-about .stat-strip {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .role-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.15rem;
  }

  .page-about .contact-card__row {
    grid-template-columns: 6.5rem minmax(0, 1fr);
    align-items: baseline;
    gap: 0.75rem;
  }
}

@media (min-width: 800px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: end;
    gap: clamp(2rem, 4vw, 3.25rem);
  }

  .page-about .reach-split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.62fr);
    align-items: start;
  }

  .page-about .about-figure--inset .media-frame {
    clip-path: polygon(0 0, calc(100% - 34px) 0, 100% 34px, 100% 100%, 0 100%);
  }
}

@media (min-width: 960px) {
  .page-about .culture-layout {
    grid-template-columns: 180px minmax(0, 1fr);
    gap: clamp(2rem, 4.5vw, 3.75rem);
    align-items: start;
  }

  .page-about .culture-index {
    position: sticky;
    top: 96px;
    border-bottom: 0;
    border-left: 1px solid var(--line-strong);
    padding: 0 0 0 0.9rem;
  }

  .page-about .culture-index__list {
    flex-direction: column;
    gap: 0.1rem;
    overflow: visible;
    padding: 0;
  }

  .page-about .culture-index__link {
    width: 100%;
    min-height: 0;
    padding: 0.6rem 0.35rem;
    border: 0;
    border-left: 2px solid transparent;
    margin-left: -0.95rem;
    font-size: 0.9rem;
    color: rgba(242, 239, 230, 0.72);
  }

  .page-about .culture-index__link:hover,
  .page-about .culture-index__link:focus-visible {
    border-left-color: var(--lime);
    background: rgba(198, 255, 74, 0.06);
    padding-left: 0.6rem;
    color: var(--paper);
  }

  .page-about .culture-panel__head {
    padding-bottom: 1.1rem;
    margin-bottom: 1.85rem;
  }

  .page-about .role-card:nth-child(even) {
    transform: translateY(1.1rem);
  }

  .page-about .role-card:nth-child(even):hover {
    transform: translateY(0.7rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .role-card,
  .page-about .timeline__item::before,
  .page-about .culture-index__link,
  .page-about .standard-item {
    transition: none;
  }

  .page-about .role-card:hover,
  .page-about .role-card:nth-child(even):hover {
    transform: none;
  }
}