.page-about {
  --about-hair: rgba(232, 238, 247, 0.14);
  --about-hair-soft: rgba(232, 238, 247, 0.07);
  --about-panel: linear-gradient(180deg, rgba(14, 26, 43, 0.92) 0%, rgba(7, 11, 20, 0.5) 100%);
  background: var(--ink-900);
  color: var(--paper);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding-block: clamp(1.4rem, 4vw, 2.4rem) clamp(2.6rem, 6vw, 5rem);
  background:
    radial-gradient(115% 85% at 92% 2%, rgba(56, 242, 214, 0.14), transparent 55%),
    radial-gradient(85% 70% at -8% 105%, rgba(255, 122, 61, 0.1), transparent 60%),
    linear-gradient(125deg, var(--ink-900) 0%, var(--ink-800) 55%, var(--ink-900) 100%);
  border-bottom: 1px solid var(--about-hair-soft);
}

.page-about .crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  margin: 0 0 clamp(1.2rem, 3.5vw, 2.4rem);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--mute);
}

.page-about .crumb a {
  color: var(--mute);
  text-decoration: none;
  padding-bottom: 1px;
  border-bottom: 1px solid var(--about-hair);
  transition: color 0.18s ease, border-color 0.18s ease;
}

.page-about .crumb a:hover,
.page-about .crumb a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-about .crumb__sep {
  color: rgba(232, 238, 247, 0.3);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(1.8rem, 5vw, 3rem);
}

.page-about .about-hero__title {
  display: flex;
  flex-direction: column;
  margin: 0.6rem 0 1.1rem;
  font-family: var(--font-serif);
  font-size: clamp(2.5rem, 10.5vw, 5rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.015em;
  color: var(--paper);
}

.page-about .about-hero__line--alt {
  color: var(--cyan);
}

.page-about .about-hero__lede {
  max-width: 56ch;
  margin: 0;
  font-size: 1rem;
  line-height: 1.82;
  color: rgba(232, 238, 247, 0.82);
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 1rem 1.4rem;
  margin: 1.8rem 0 0;
  padding: 1.1rem 0 0;
  border-top: 1px solid var(--about-hair);
  list-style: none;
}

.page-about .about-hero__facts-n {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.2rem, 4.4vw, 1.75rem);
  line-height: 1.15;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .about-hero__facts-l {
  display: block;
  margin-top: 0.28rem;
  font-size: 0.8rem;
  line-height: 1.55;
  color: var(--mute);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.8rem;
}

.page-about .about-hero__figure {
  position: relative;
  margin: 0;
  border: 1px solid var(--about-hair);
  background: var(--ink-800);
  overflow: hidden;
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.page-about .figure__caption {
  display: block;
  padding: 0.6rem 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.04em;
  color: var(--mute);
  border-top: 1px solid var(--about-hair-soft);
}

/* ---------- 通用分区 ---------- */
.page-about .about-block {
  position: relative;
  padding-block: clamp(2.8rem, 7vw, 6rem);
}

.page-about .about-block + .about-block {
  border-top: 1px solid var(--about-hair-soft);
}

/* ---------- 品牌起点 ---------- */
.page-about .about-origin__grid {
  display: grid;
  gap: 1.6rem clamp(1.6rem, 4vw, 3.6rem);
}

.page-about .about-origin__title {
  margin: 0.5rem 0 0;
  font-family: var(--font-serif);
  font-size: clamp(1.65rem, 5vw, 2.5rem);
  line-height: 1.28;
  letter-spacing: -0.01em;
}

.page-about .about-origin__text {
  margin: 0 0 1rem;
  font-size: 1rem;
  line-height: 1.85;
  color: rgba(232, 238, 247, 0.8);
}

.page-about .about-origin__text:last-of-type {
  margin-bottom: 0;
}

.page-about .about-origin__pains {
  list-style: none;
  margin: 1.6rem 0 0;
  padding: 0;
  display: grid;
  border-top: 1px solid var(--about-hair);
}

.page-about .about-origin__pains li {
  display: grid;
  gap: 0.3rem;
  padding: 0.95rem 0;
  border-bottom: 1px solid var(--about-hair-soft);
}

.page-about .about-origin__pain-k {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  color: var(--orange);
}

.page-about .about-origin__pain-v {
  font-size: 0.9375rem;
  line-height: 1.75;
  color: rgba(232, 238, 247, 0.76);
}

/* ---------- 理念落点 ---------- */
.page-about .about-ethos__head {
  max-width: 62ch;
  margin-bottom: 1.6rem;
}

.page-about .about-ethos__title {
  margin: 0.5rem 0 0.7rem;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 4.6vw, 2.4rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.page-about .about-ethos__sub {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: rgba(232, 238, 247, 0.72);
}

.page-about .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.6rem;
}

.page-about .filter-btn {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  padding: 0.5rem 0.85rem;
  border: 1px solid var(--about-hair);
  border-radius: var(--radius);
  background: transparent;
  color: var(--mute);
  cursor: pointer;
  transition: color 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}

.page-about .filter-btn:hover,
.page-about .filter-btn:focus-visible {
  color: var(--paper);
  border-color: var(--hair-strong);
}

.page-about .filter-btn[aria-pressed="true"] {
  background: var(--cyan);
  border-color: var(--cyan);
  color: var(--ink-900);
}

.page-about .about-ethos__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.page-about .about-ethos__item {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  padding: 1.3rem 1.15rem 1.4rem;
  background: var(--about-panel);
  border-top: 2px solid var(--cyan);
}

.page-about .about-ethos__item:nth-child(2) {
  border-top-color: var(--orange);
}

.page-about .about-ethos__item:nth-child(3) {
  border-top-color: var(--amber);
}

.page-about .about-ethos__item:nth-child(4) {
  border-top-color: var(--mute);
}

.page-about .about-ethos__idx {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  color: var(--mute);
}

.page-about .about-ethos__item-t {
  margin: 0;
  font-size: 1.0625rem;
  line-height: 1.42;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-ethos__item-p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.78;
  color: rgba(232, 238, 247, 0.72);
}

/* ---------- 版本时间轴 ---------- */
.page-about .about-timeline__head {
  max-width: 64ch;
  margin-bottom: 1.8rem;
}

.page-about .about-timeline__title {
  margin: 0.5rem 0 0.7rem;
  font-family: var(--font-serif);
  font-size: clamp(1.55rem, 4.8vw, 2.4rem);
  line-height: 1.26;
  letter-spacing: -0.01em;
}

.page-about .about-timeline__sub {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: rgba(232, 238, 247, 0.72);
}

.page-about .about-timeline__figure {
  margin: 0 0 1.8rem;
  border: 1px solid var(--about-hair);
  background: var(--ink-800);
  overflow: hidden;
}

.page-about .about-timeline__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 8;
  object-fit: cover;
}

.page-about .about-timeline__list {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.4rem;
}

.page-about .about-timeline__list::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 1.1rem;
  bottom: 1.6rem;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan) 0%, rgba(56, 242, 214, 0.3) 55%, rgba(56, 242, 214, 0) 100%);
}

.page-about .about-timeline__node {
  position: relative;
  padding-left: 2.1rem;
}

.page-about .about-timeline__node::before {
  content: "";
  position: absolute;
  left: 0;
  top: 1.2rem;
  width: 15px;
  height: 15px;
  background: var(--ink-900);
  border: 1px solid var(--cyan);
  transform: rotate(45deg);
}

.page-about .about-timeline__h {
  margin: 0;
  font-size: inherit;
  font-weight: inherit;
}

.page-about .about-timeline__trigger {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 1.25rem;
  gap: 0.3rem 1rem;
  width: 100%;
  padding: 0.95rem 0;
  background: none;
  border: 0;
  border-bottom: 1px solid var(--about-hair);
  color: var(--paper);
  text-align: left;
  font: inherit;
  cursor: pointer;
  transition: border-color 0.18s ease;
}

.page-about .about-timeline__trigger:hover,
.page-about .about-timeline__trigger:focus-visible {
  border-bottom-color: var(--cyan);
}

.page-about .about-timeline__ver {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  color: var(--cyan);
}

.page-about .about-timeline__label {
  grid-column: 1;
  font-size: 1rem;
  line-height: 1.55;
  color: rgba(232, 238, 247, 0.9);
}

.page-about .about-timeline__icon {
  grid-column: 2;
  grid-row: 1 / span 2;
  justify-self: end;
  align-self: center;
  position: relative;
  width: 1rem;
  height: 1rem;
}

.page-about .about-timeline__icon::before,
.page-about .about-timeline__icon::after {
  content: "";
  position: absolute;
  background: var(--mute);
  transition: transform 0.2s ease, background 0.2s ease;
}

.page-about .about-timeline__icon::before {
  left: 0;
  right: 0;
  top: calc(50% - 1px);
  height: 2px;
}

.page-about .about-timeline__icon::after {
  top: 0;
  bottom: 0;
  left: calc(50% - 1px);
  width: 2px;
}

.page-about .about-timeline__trigger[aria-expanded="true"] .about-timeline__icon::before {
  background: var(--cyan);
}

.page-about .about-timeline__trigger[aria-expanded="true"] .about-timeline__icon::after {
  transform: scaleY(0);
}

.page-about .about-timeline__panel {
  padding: 0 0 1.1rem;
}

.page-about .about-timeline__panel p {
  margin: 0;
  max-width: 78ch;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: rgba(232, 238, 247, 0.74);
}

.page-about .about-timeline__panel a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 团队与数据能力 ---------- */
.page-about .about-team__grid {
  display: grid;
  gap: 1.8rem;
}

.page-about .about-team__title {
  margin: 0.5rem 0 0.8rem;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 4.8vw, 2.4rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.page-about .about-team__text {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: rgba(232, 238, 247, 0.74);
}

.page-about .about-team__figure {
  margin: 0;
  border: 1px solid var(--about-hair);
  background: var(--ink-800);
  overflow: hidden;
}

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 12 / 7;
  object-fit: cover;
}

.page-about .about-team__stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 0 1.4rem;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--about-hair);
}

.page-about .about-team__stat {
  padding: 1rem 0;
  border-bottom: 1px solid var(--about-hair-soft);
}

.page-about .about-team__stat-k {
  font-size: 0.8rem;
  line-height: 1.6;
  color: var(--mute);
}

.page-about .about-team__stat-v {
  margin: 0.3rem 0 0;
  font-family: var(--font-mono);
  font-size: clamp(1.3rem, 4vw, 1.85rem);
  line-height: 1.15;
  color: var(--paper);
  font-variant-numeric: tabular-nums;
}

/* ---------- 服务覆盖与合作生态 ---------- */
.page-about .about-network__head {
  max-width: 68ch;
  margin-bottom: 2rem;
}

.page-about .about-network__title {
  margin: 0.5rem 0 0.7rem;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 4.8vw, 2.4rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.page-about .about-network__sub {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: rgba(232, 238, 247, 0.72);
}

.page-about .about-network__grid {
  display: grid;
  gap: 1.6rem;
}

.page-about .about-network__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--about-hair);
}

.page-about .about-network__item {
  display: grid;
  gap: 0.3rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--about-hair-soft);
  transition: background 0.18s ease, padding-left 0.18s ease;
}

.page-about .about-network__item:hover {
  background: rgba(56, 242, 214, 0.05);
  padding-left: 0.6rem;
}

.page-about .about-network__item-t {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

.page-about .about-network__item-d {
  font-size: 0.9rem;
  line-height: 1.75;
  color: rgba(232, 238, 247, 0.74);
}

.page-about .about-network__map {
  padding: 0.6rem;
  border: 1px solid var(--about-hair);
  background: linear-gradient(180deg, rgba(14, 26, 43, 0.7), rgba(7, 11, 20, 0.4));
}

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

.page-about .about-network__links line {
  stroke: rgba(56, 242, 214, 0.28);
  stroke-width: 1;
  stroke-dasharray: 3 5;
}

.page-about .about-network__core {
  fill: var(--orange);
}

.page-about .about-network__nodes circle {
  fill: var(--ink-900);
  stroke: var(--cyan);
  stroke-width: 1.5;
  transition: fill 0.18s ease;
}

.page-about .about-network__nodes circle:hover {
  fill: var(--cyan);
}

.page-about .about-network__labels text {
  fill: var(--mute);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  text-anchor: middle;
}

/* ---------- 荣誉与资质 ---------- */
.page-about .about-honor__grid {
  display: grid;
  gap: 1.6rem;
}

.page-about .about-honor__title {
  margin: 0.5rem 0 0;
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 4.6vw, 2.3rem);
  line-height: 1.28;
  letter-spacing: -0.01em;
}

.page-about .about-honor__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  border-top: 1px solid var(--about-hair);
}

.page-about .about-honor__item {
  display: grid;
  gap: 1rem;
  align-items: baseline;
  padding: 0.95rem 0;
  border-bottom: 1px solid var(--about-hair-soft);
}

.page-about .about-honor__year {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  color: var(--amber);
}

.page-about .about-honor__text {
  font-size: 0.95rem;
  line-height: 1.72;
  color: rgba(232, 238, 247, 0.82);
}

/* ---------- 收束 ---------- */
.page-about .about-next {
  background:
    radial-gradient(90% 120% at 100% 0%, rgba(56, 242, 214, 0.12), transparent 58%),
    linear-gradient(160deg, var(--ink-800), var(--ink-900));
}

.page-about .about-next__inner {
  display: grid;
  gap: 1.1rem;
}

.page-about .about-next__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 5.4vw, 2.8rem);
  font-weight: 700;
  line-height: 1.14;
  letter-spacing: -0.01em;
}

.page-about .about-next__text {
  margin: 0;
  max-width: 62ch;
  font-size: 0.9375rem;
  line-height: 1.82;
  color: rgba(232, 238, 247, 0.76);
}

.page-about .about-next__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 0.4rem;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-origin__pains li {
    grid-template-columns: 7rem minmax(0, 1fr);
    gap: 1.2rem;
    align-items: baseline;
  }

  .page-about .about-network__item {
    grid-template-columns: 9rem minmax(0, 1fr);
    gap: 1.2rem;
    align-items: baseline;
  }

  .page-about .about-honor__item {
    grid-template-columns: 5.6rem minmax(0, 1fr);
  }
}

@media (min-width: 700px) {
  .page-about .about-ethos__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__lede {
    font-size: 1.0625rem;
  }

  .page-about .about-network__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    align-items: center;
    gap: clamp(1.6rem, 4vw, 3.5rem);
  }
}

@media (min-width: 960px) {
  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }

  .page-about .about-honor__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: clamp(1.6rem, 4vw, 3.4rem);
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: end;
    gap: clamp(2rem, 4vw, 4rem);
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    align-items: start;
    gap: 2rem clamp(2rem, 4vw, 4rem);
  }

  .page-about .about-team__intro {
    grid-column: 1;
    grid-row: 1;
  }

  .page-about .about-team__figure {
    grid-column: 2;
    grid-row: 1 / span 2;
  }

  .page-about .about-team__stats {
    grid-column: 1;
    grid-row: 2;
  }
}

@media (min-width: 1180px) {
  .page-about .about-ethos__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition-duration: 0.001ms !important;
    animation-duration: 0.001ms !important;
  }
}