.page-about {
  --about-rail: 170px;
  --about-deep: #0A1020;
  --about-text: #C3D6EA;
  --about-text-soft: #B6C9DD;
  display: block;
  overflow-x: clip;
  background: var(--ink);
  color: var(--ice);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  padding: 26px 0 48px;
  overflow: hidden;
  background:
    radial-gradient(760px 380px at 82% -18%, rgba(34, 211, 238, 0.18), transparent 68%),
    radial-gradient(520px 320px at 2% 6%, rgba(255, 107, 44, 0.10), transparent 72%),
    linear-gradient(180deg, var(--navy-a), var(--ink) 84%);
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(34, 211, 238, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(34, 211, 238, 0.055) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: linear-gradient(180deg, #000, transparent 76%);
  mask-image: linear-gradient(180deg, #000, transparent 76%);
}

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

.page-about .about-hero .breadcrumbs {
  margin-bottom: 30px;
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
}

.page-about .about-hero__rail {
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-width: 0;
}

.page-about .about-rail__label {
  margin: 0;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--cyan);
  opacity: 0.72;
  white-space: nowrap;
}

.page-about .about-rail__list {
  list-style: none;
  margin: 0;
  padding: 0 0 4px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
}

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

.page-about .about-rail__list a {
  display: block;
  padding: 6px 13px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 13px;
  color: var(--slate);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.2s var(--ease), background-color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .about-rail__list a:hover,
.page-about .about-rail__list a:focus-visible {
  color: var(--ink);
  background: var(--cyan);
  border-color: var(--cyan);
}

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

.page-about .about-hero h1 {
  margin: 14px 0 18px;
  font-family: var(--display);
  font-size: clamp(34px, 6.4vw, 62px);
  font-weight: 900;
  line-height: 1.03;
  letter-spacing: -0.01em;
  color: var(--ice);
}

.page-about .about-hero .lead {
  margin: 0 0 26px;
  max-width: 64ch;
  font-size: 17px;
  line-height: 1.68;
  color: var(--about-text);
}

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

.page-about .about-figures {
  margin: 42px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-figures > div {
  padding: 18px 16px;
  background: rgba(7, 11, 20, 0.76);
}

.page-about .about-figures dt {
  margin-bottom: 8px;
  font-size: 13px;
  color: var(--slate);
}

.page-about .about-figures dd {
  margin: 0;
  font-family: var(--mono);
  font-size: clamp(24px, 4.4vw, 34px);
  font-weight: 700;
  line-height: 1;
  color: var(--ice);
}

.page-about .about-figures > div:last-child dd {
  color: var(--orange);
}

.page-about .about-figures__unit {
  margin-left: 2px;
  font-size: 0.52em;
  font-weight: 500;
  color: var(--slate);
}

/* ---------- 通用章节 ---------- */

.page-about .section {
  padding: 56px 0;
}

.page-about .section--band {
  background: linear-gradient(180deg, var(--navy-a), var(--navy-b));
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}

.page-about .section-title {
  color: var(--ice);
}

.page-about .about-media {
  position: relative;
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--carbon);
}

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

.page-about .about-media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, transparent 42%, rgba(7, 11, 20, 0.82));
}

.page-about .about-media figcaption {
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 12px;
  z-index: 1;
  font-size: 13px;
  line-height: 1.5;
  color: var(--about-text-soft);
}

/* ---------- 发展历程 ---------- */

.page-about .about-timeline__axis {
  display: block;
  width: 100%;
  height: 36px;
  margin: 4px 0 22px;
}

.page-about .about-tabs .tabs__list {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  padding-bottom: 2px;
  border-bottom: 1px solid var(--line-soft);
  scrollbar-width: none;
}

.page-about .about-tabs .tabs__list::-webkit-scrollbar {
  display: none;
}

.page-about .about-tabs .tab {
  flex: 0 0 auto;
  appearance: none;
  background: transparent;
  border: 0;
  border-bottom: 2px solid transparent;
  padding: 10px 14px;
  font-family: var(--body);
  font-size: 14px;
  font-weight: 600;
  color: var(--slate);
  white-space: nowrap;
  cursor: pointer;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-about .about-tabs .tab:hover {
  color: var(--ice);
}

.page-about .about-tabs .tab[aria-selected="true"],
.page-about .about-tabs .tab.is-active {
  color: var(--ice);
  border-bottom-color: var(--orange);
}

.page-about .about-tabs .tabs__panel {
  padding-top: 24px;
  animation: about-fade 0.24s var(--ease);
}

.page-about .about-tabs .tabs__panel[hidden] {
  display: none;
}

@keyframes about-fade {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.page-about .about-tabs__kicker {
  margin: 0 0 8px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--orange);
}

.page-about .about-tabs__title {
  margin: 0 0 12px;
  font-family: var(--display);
  font-size: clamp(22px, 3.2vw, 30px);
  color: var(--ice);
}

.page-about .about-tabs .tabs__panel > p {
  margin: 0 0 18px;
  max-width: 68ch;
  font-size: 16px;
  line-height: 1.72;
  color: var(--about-text);
}

.page-about .about-tabs__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-tabs__list li {
  position: relative;
  padding: 11px 14px 11px 30px;
  border: 1px solid var(--line-soft);
  border-radius: 10px;
  background: var(--glass);
  font-size: 14px;
  line-height: 1.55;
  color: var(--about-text-soft);
}

.page-about .about-tabs__list li::before {
  content: "";
  position: absolute;
  left: 12px;
  top: 17px;
  width: 8px;
  height: 8px;
  background: var(--cyan);
  transform: rotate(45deg);
}

.page-about .about-timeline__media {
  margin-top: 34px;
}

/* ---------- 服务对象 ---------- */

.page-about .about-audience__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
}

.page-about .about-scene {
  padding: 20px 20px 22px;
  border-left: 2px solid var(--line);
  border-radius: 0 var(--radius) var(--radius) 0;
  background: linear-gradient(120deg, rgba(34, 211, 238, 0.07), rgba(34, 211, 238, 0) 62%);
  transition: border-color 0.22s var(--ease), background-color 0.22s var(--ease);
}

.page-about .about-scene:hover {
  border-left-color: var(--orange);
}

.page-about .about-scene__index {
  margin: 0 0 10px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--cyan);
}

.page-about .about-scene__title {
  margin: 0 0 10px;
  font-size: 19px;
  line-height: 1.4;
  color: var(--ice);
}

.page-about .about-scene__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--about-text-soft);
}

/* ---------- 数据与内容 ---------- */

.page-about .about-data__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
}

.page-about .about-data__copy p {
  margin: 0 0 16px;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.76;
  color: var(--about-text);
}

.page-about .about-data__copy a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  padding-bottom: 2px;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

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

.page-about .about-data__cards {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  align-content: start;
}

.page-about .about-datum {
  padding: 18px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--glass);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: transform 0.22s var(--ease), border-color 0.22s var(--ease), box-shadow 0.22s var(--ease);
}

.page-about .about-datum:hover,
.page-about .about-datum:focus-within {
  transform: translateY(-3px);
  border-color: rgba(34, 211, 238, 0.5);
  box-shadow: 0 14px 32px rgba(34, 211, 238, 0.12);
}

.page-about .about-datum__value {
  margin: 0;
  font-family: var(--mono);
  font-size: clamp(22px, 3.4vw, 28px);
  font-weight: 700;
  line-height: 1.15;
  color: var(--cyan);
}

.page-about .about-datum__label {
  margin: 6px 0 0;
  font-size: 13px;
  line-height: 1.5;
  color: var(--slate);
}

.page-about .about-datum__more {
  max-height: 0;
  margin: 0;
  overflow: hidden;
  opacity: 0;
  font-size: 13px;
  line-height: 1.65;
  color: #9FB6CC;
  transition: max-height 0.24s var(--ease), opacity 0.24s var(--ease), margin-top 0.24s var(--ease);
}

.page-about .about-datum:hover .about-datum__more,
.page-about .about-datum:focus .about-datum__more,
.page-about .about-datum:focus-within .about-datum__more {
  max-height: 140px;
  margin-top: 10px;
  opacity: 1;
}

/* ---------- 团队 ---------- */

.page-about .about-team__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
}

.page-about .about-team__intro {
  margin: 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.76;
  color: var(--about-text);
}

.page-about .about-team__list {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-about .about-team__list li {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr);
  gap: 14px;
  align-items: baseline;
  padding: 14px 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-team__list li:last-child {
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-team__list strong {
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-about .about-team__list span {
  font-size: 14px;
  line-height: 1.68;
  color: var(--about-text-soft);
}

.page-about .about-team__foot {
  margin: 20px 0 0;
}

.page-about .about-team__foot a {
  color: var(--cyan);
  text-decoration: none;
  font-size: 15px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 2px;
}

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

/* ---------- 运营理念 ---------- */

.page-about .about-values__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
}

.page-about .about-values__head p {
  margin: 0;
  max-width: 52ch;
  font-size: 16px;
  line-height: 1.76;
  color: var(--about-text);
}

.page-about .about-values__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-values__list li {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 16px;
  padding: 20px 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-values__list li:last-child {
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-values__idx {
  padding-top: 3px;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--orange);
}

.page-about .about-values__list h3 {
  margin: 0 0 6px;
  font-size: 18px;
  line-height: 1.4;
  color: var(--ice);
}

.page-about .about-values__list p {
  margin: 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.72;
  color: var(--about-text-soft);
}

/* ---------- 规模与伙伴 ---------- */

.page-about .about-scale__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
}

.page-about .about-scale__figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-scale__cell {
  padding: 20px 16px;
  background: rgba(7, 11, 20, 0.82);
}

.page-about .about-scale__num {
  display: block;
  font-family: var(--mono);
  font-size: clamp(22px, 3.6vw, 30px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--ice);
}

.page-about .about-scale__num--orange {
  color: var(--orange);
}

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

.page-about .about-scale__cap {
  display: block;
  margin-top: 7px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--slate);
}

.page-about .about-scale__body p {
  margin: 0 0 16px;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.76;
  color: var(--about-text);
}

.page-about .about-scale__media {
  margin-top: 22px;
}

/* ---------- 收尾 ---------- */

.page-about .about-cta__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
  padding: 30px 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    radial-gradient(420px 200px at 88% 0%, rgba(255, 107, 44, 0.16), transparent 70%),
    linear-gradient(120deg, rgba(34, 211, 238, 0.10), rgba(34, 211, 238, 0.02));
}

.page-about .about-cta h2 {
  margin: 0 0 10px;
  font-family: var(--display);
  font-size: clamp(22px, 3.2vw, 30px);
  line-height: 1.25;
  color: var(--ice);
}

.page-about .about-cta p {
  margin: 0;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.72;
  color: var(--about-text-soft);
}

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

/* ---------- 滚动显现 ---------- */

.has-js .page-about [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.5s var(--ease), transform 0.5s var(--ease);
}

.has-js .page-about [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-about .about-tabs__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

@media (min-width: 900px) {
  .page-about .about-hero {
    padding: 34px 0 62px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: 52px;
    align-items: start;
  }

  .page-about .about-rail__label {
    height: 148px;
    writing-mode: vertical-rl;
    text-orientation: mixed;
    letter-spacing: 0.34em;
    white-space: normal;
  }

  .page-about .about-rail__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-rail__list a {
    padding: 6px 0 6px 14px;
    border: 0;
    border-left: 2px solid var(--line);
    border-radius: 0;
    font-family: var(--mono);
    font-size: 12px;
    letter-spacing: 0.06em;
  }

  .page-about .about-rail__list a:hover,
  .page-about .about-rail__list a:focus-visible {
    color: var(--ice);
    background: transparent;
    border-left-color: var(--orange);
  }

  .page-about .about-figures {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .section {
    padding: 84px 0;
  }

  .page-about .about-audience__grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: 26px;
  }

  .page-about .about-scene:nth-child(1) {
    grid-column: span 7;
  }

  .page-about .about-scene:nth-child(2) {
    grid-column: span 5;
  }

  .page-about .about-scene:nth-child(3) {
    grid-column: span 5;
  }

  .page-about .about-scene:nth-child(4) {
    grid-column: span 7;
  }

  .page-about .about-data__grid {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
    gap: 52px;
    align-items: start;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    gap: 52px;
    align-items: center;
  }

  .page-about .about-values__grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    gap: 60px;
    align-items: start;
  }

  .page-about .about-scale__grid {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    gap: 52px;
    align-items: start;
  }

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 44px;
    padding: 42px 44px;
  }
}

@media (hover: none) {
  .page-about .about-datum__more {
    max-height: none;
    margin-top: 10px;
    opacity: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-tabs .tabs__panel {
    animation: none;
  }

  .has-js .page-about [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .page-about .about-scene,
  .page-about .about-datum,
  .page-about .about-rail__list a {
    transition: none;
  }
}