/* ================= page-about ================= */
.page-about {
  display: block;
  background: var(--ink-900);
  color: var(--paper);
  overflow-x: hidden;
}

.page-about .section {
  position: relative;
  padding: clamp(56px, 9vw, 106px) 0;
  border-bottom: 1px solid var(--steel);
}

/* ---------- 章节头 ---------- */
.page-about .section__head {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin: 0 0 clamp(26px, 4vw, 46px);
}

.page-about .section__index {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.25rem, 2.4vw, 1.75rem);
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--neon);
  line-height: 1;
}

.page-about .section__title {
  margin: 0;
  font-size: clamp(1.6rem, 3.6vw, 2.6rem);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -.01em;
}

.page-about .section__lede {
  margin: 0;
  max-width: 58ch;
  color: var(--muted);
  font-size: 1.0625rem;
  line-height: 1.85;
}

@media (min-width: 900px) {
  .page-about .section__head {
    display: grid;
    grid-template-columns: 92px minmax(0, 1fr);
    gap: 12px 28px;
    align-items: start;
  }
  .page-about .section__index {
    grid-column: 1;
    grid-row: 1 / span 2;
    padding-top: 6px;
  }
  .page-about .section__title {
    grid-column: 2;
    grid-row: 1;
    max-width: 26ch;
  }
  .page-about .section__lede {
    grid-column: 2;
    grid-row: 2;
  }
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: calc(var(--header-h) + clamp(20px, 4vh, 48px)) 0 clamp(52px, 9vh, 104px);
  border-bottom: 1px solid var(--steel);
}

.page-about .about-hero__media {
  position: absolute;
  inset: 0;
  z-index: -2;
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 64% 50%;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(100deg, var(--ink-900) 6%, rgba(10, 21, 38, .94) 36%, rgba(10, 21, 38, .42) 72%, rgba(10, 21, 38, .68) 100%),
    linear-gradient(180deg, rgba(5, 11, 22, .55) 0%, rgba(10, 21, 38, .35) 40%, var(--ink-900) 100%);
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: clamp(12px, 2vh, 22px);
}

.page-about .about-hero .breadcrumb__list {
  margin: 0 0 4px;
}

.page-about .about-hero__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 7.2vw, 5.6rem);
  font-weight: 900;
  line-height: 1.04;
  letter-spacing: -.02em;
  max-width: 18ch;
  text-wrap: balance;
}

.page-about .about-hero__lede {
  margin: 0;
  max-width: 48ch;
  font-size: 1.0625rem;
  line-height: 1.85;
  color: var(--paper);
  opacity: .9;
}

.page-about .about-hero__meta {
  margin: 6px 0 0;
  font-size: .75rem;
  letter-spacing: .18em;
  color: var(--orange);
  text-transform: uppercase;
}

/* ---------- 右侧浮动章节条 ---------- */
.page-about .about-rail {
  display: none;
}

@media (min-width: 1500px) {
  .page-about .about-rail {
    position: fixed;
    top: 50%;
    right: 18px;
    transform: translateY(-50%);
    z-index: 30;
    display: flex;
    flex-direction: column;
    gap: 8px;
  }
  .page-about .about-rail__link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    border: 1px solid var(--steel);
    border-radius: var(--radius-pill);
    background: rgba(10, 21, 38, .78);
    color: var(--muted);
    font-family: var(--font-mono);
    font-size: .6875rem;
    letter-spacing: .06em;
    text-decoration: none;
    transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease),
      background-color var(--dur) var(--ease), transform var(--dur) var(--ease);
  }
  .page-about .about-rail__link:hover,
  .page-about .about-rail__link:focus-visible {
    color: var(--paper);
    border-color: var(--neon);
    transform: translateX(-4px);
    outline: none;
  }
  .page-about .about-rail__link:focus-visible {
    outline: 2px solid var(--neon);
    outline-offset: 2px;
  }
  .page-about .about-rail__link.is-active {
    color: var(--neon-ink);
    background: var(--neon);
    border-color: var(--neon);
  }
}

/* ---------- 01 服务主线 ---------- */
.page-about .about-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--steel);
}

.page-about .about-flow__item {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 22px 0;
  border-bottom: 1px solid var(--steel);
  transition: border-color var(--dur) var(--ease);
}

.page-about .about-flow__item:hover {
  border-bottom-color: rgba(53, 240, 138, .45);
}

.page-about .about-flow__key {
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .2em;
  color: var(--orange);
}

.page-about .about-flow__title {
  margin: 0;
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -.005em;
}

.page-about .about-flow__text {
  margin: 0;
  max-width: 62ch;
  color: var(--muted);
  font-size: .9375rem;
  line-height: 1.85;
}

@media (min-width: 860px) {
  .page-about .about-flow__item {
    display: grid;
    grid-template-columns: 130px 220px minmax(0, 1fr);
    align-items: baseline;
    gap: 28px;
    padding: 26px 0;
  }
  .page-about .about-flow__key {
    font-size: .8125rem;
  }
}

/* ---------- 02 使用人群 ---------- */
.page-about .about-audience {
  background: var(--ink-800);
}

.page-about .about-audience__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .about-audience__card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 26px 22px 28px;
  min-height: 220px;
  border: 1px solid var(--steel);
  border-radius: var(--radius-md);
  background: linear-gradient(158deg, rgba(10, 21, 38, .9), rgba(15, 31, 58, .55));
  overflow: hidden;
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-audience__card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 52px;
  height: 3px;
  background: var(--neon);
  border-radius: 0 0 3px 0;
}

.page-about .about-audience__card:nth-child(2)::before {
  background: var(--orange);
}

.page-about .about-audience__card:hover {
  transform: translateY(-6px);
  border-color: var(--neon);
}

.page-about .about-audience__code {
  font-family: var(--font-mono);
  font-size: .6875rem;
  letter-spacing: .2em;
  color: var(--muted);
}

.page-about .about-audience__who {
  margin: 4px 0 0;
  font-size: 1.2rem;
  font-weight: 700;
  line-height: 1.4;
}

.page-about .about-audience__text {
  margin: 0;
  color: var(--muted);
  font-size: .9375rem;
  line-height: 1.85;
}

@media (min-width: 760px) {
  .page-about .about-audience__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
  }
}

@media (min-width: 1180px) {
  .page-about .about-audience__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-audience__grid > :nth-child(2) {
    margin-top: 26px;
  }
  .page-about .about-audience__grid > :nth-child(4) {
    margin-top: 26px;
  }
}

/* ---------- 03 赛季时间轴 ---------- */
.page-about .about-timeline__viewport {
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scroll-snap-type: x proximity;
  padding-bottom: 18px;
  scrollbar-width: thin;
  scrollbar-color: var(--steel) transparent;
}

.page-about .about-timeline__viewport::-webkit-scrollbar {
  height: 6px;
}

.page-about .about-timeline__viewport::-webkit-scrollbar-track {
  background: transparent;
}

.page-about .about-timeline__viewport::-webkit-scrollbar-thumb {
  background: var(--steel);
  border-radius: var(--radius-pill);
}

.page-about .about-timeline__track {
  display: flex;
  width: max-content;
  margin: 0;
  padding: 6px clamp(20px, 5vw, 64px) 10px;
  list-style: none;
}

.page-about .about-timeline__node {
  position: relative;
  flex: 0 0 clamp(228px, 64vw, 272px);
  scroll-snap-align: start;
  padding: 38px 26px 6px 22px;
}

.page-about .about-timeline__node::before {
  content: "";
  position: absolute;
  top: 22px;
  left: 22px;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, rgba(53, 240, 138, .6), rgba(53, 240, 138, .05));
}

.page-about .about-timeline__node:last-child::before {
  background: linear-gradient(90deg, var(--neon), rgba(255, 122, 47, 0));
}

.page-about .about-timeline__node::after {
  content: "";
  position: absolute;
  top: 17px;
  left: 16px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  border: 2px solid var(--neon);
  background: var(--ink-900);
}

.page-about .about-timeline__season {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--neon);
  font-variant-numeric: tabular-nums;
}

.page-about .about-timeline__title {
  margin: 12px 0 8px;
  font-size: 1.1rem;
  font-weight: 700;
  line-height: 1.4;
}

.page-about .about-timeline__text {
  margin: 0;
  color: var(--muted);
  font-size: .9375rem;
  line-height: 1.8;
}

.page-about .about-timeline__hint {
  margin: 0 0 clamp(28px, 5vw, 52px);
  padding: 0 clamp(20px, 5vw, 64px);
  font-size: .75rem;
  letter-spacing: .16em;
  color: var(--muted);
}

@media (min-width: 1100px) {
  .page-about .about-timeline__hint {
    display: none;
  }
}

/* 数据台收尾卡 */
.page-about .about-desk {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3vw, 34px);
  align-items: center;
  padding: clamp(22px, 3vw, 34px);
  border: 1px solid var(--steel);
  border-radius: var(--radius-lg);
  background: linear-gradient(120deg, rgba(15, 31, 58, .95), rgba(10, 21, 38, .6));
}

.page-about .about-desk__body {
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: flex-start;
}

.page-about .about-desk__title {
  margin: 0;
  font-size: clamp(1.3rem, 2.4vw, 1.7rem);
  font-weight: 800;
  line-height: 1.35;
}

.page-about .about-desk__text {
  margin: 0;
  max-width: 52ch;
  color: var(--muted);
  font-size: .9375rem;
  line-height: 1.85;
}

.page-about .about-desk__media img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  object-fit: cover;
  aspect-ratio: 3 / 2;
}

@media (min-width: 920px) {
  .page-about .about-desk {
    grid-template-columns: 1.05fr 1fr;
    padding: clamp(28px, 3vw, 44px);
  }
}

/* ---------- 04 团队 ---------- */
.page-about .about-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .about-team__card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 26px 48px 26px 22px;
  min-height: 230px;
  border: 1px solid var(--steel);
  border-radius: var(--radius-md);
  background: rgba(15, 31, 58, .5);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease),
    background-color var(--dur) var(--ease);
}

.page-about .about-team__card:hover {
  transform: translateY(-6px);
  border-color: var(--neon);
  background: rgba(15, 31, 58, .82);
}

.page-about .about-team__tag {
  position: absolute;
  top: 24px;
  right: 20px;
  writing-mode: vertical-rl;
  font-size: .75rem;
  letter-spacing: .2em;
  color: var(--muted);
  transition: transform var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .about-team__card:hover .about-team__tag {
  transform: translateX(-6px);
  color: var(--neon);
}

.page-about .about-team__title {
  margin: 0;
  font-size: 1.2rem;
  font-weight: 700;
  line-height: 1.4;
}

.page-about .about-team__text {
  margin: 0;
  color: var(--muted);
  font-size: .9375rem;
  line-height: 1.85;
}

.page-about .about-team__meta {
  margin: auto 0 0;
  padding-top: 14px;
  font-size: .75rem;
  letter-spacing: .12em;
  color: var(--orange);
  border-top: 1px solid var(--steel);
}

@media (min-width: 720px) {
  .page-about .about-team__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
  }
}

@media (min-width: 1120px) {
  .page-about .about-team__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 05 合作生态 ---------- */
.page-about .about-partners {
  background: var(--ink-950);
}

.page-about .about-partners__media {
  margin: 0 0 clamp(24px, 4vw, 42px);
}

.page-about .about-partners__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 12 / 7;
  object-fit: cover;
  border-radius: var(--radius-lg);
  border: 1px solid var(--steel);
}

.page-about .about-partners__grid {
  display: grid;
  grid-template-columns: 1fr;
  border-top: 1px solid var(--steel);
}

.page-about .about-partners__cell {
  padding: 24px 0 26px;
  border-bottom: 1px solid var(--steel);
}

.page-about .about-partners__title {
  margin: 0 0 8px;
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.45;
}

.page-about .about-partners__text {
  margin: 0;
  max-width: 46ch;
  color: var(--muted);
  font-size: .9375rem;
  line-height: 1.85;
}

@media (min-width: 840px) {
  .page-about .about-partners__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-partners__cell {
    padding: 28px 30px 30px;
    border-bottom: 0;
    border-left: 1px solid var(--steel);
  }
  .page-about .about-partners__cell:first-child {
    padding-left: 0;
    border-left: 0;
  }
  .page-about .about-partners__cell:last-child {
    padding-right: 0;
  }
}

/* ---------- 收尾 ---------- */
.page-about .about-next {
  padding: clamp(52px, 8vw, 96px) 0 clamp(64px, 10vw, 120px);
  background:
    radial-gradient(90% 120% at 12% 0%, rgba(53, 240, 138, .12), transparent 62%),
    radial-gradient(70% 100% at 92% 100%, rgba(255, 122, 47, .12), transparent 60%);
}

.page-about .about-next__title {
  margin: 12px 0 clamp(22px, 3vw, 34px);
  font-size: clamp(1.5rem, 3.4vw, 2.3rem);
  font-weight: 900;
  line-height: 1.25;
  max-width: 22ch;
}

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

.page-about .about-next__actions .btn {
  width: 100%;
}

@media (min-width: 640px) {
  .page-about .about-next__actions .btn {
    width: auto;
  }
}

/* ---------- 极窄屏防溢出 ---------- */
@media (max-width: 380px) {
  .page-about .about-hero__title {
    font-size: 2.15rem;
  }
  .page-about .about-team__card {
    padding-right: 42px;
  }
}
<<<END>>>