.page-about {
  position: relative;
  overflow-x: hidden;
  color: var(--mist);
  background:
    radial-gradient(1100px 620px at 8% -6%, rgba(35, 240, 199, .10), transparent 60%),
    radial-gradient(900px 560px at 98% 14%, rgba(255, 122, 26, .07), transparent 58%),
    linear-gradient(180deg, #06251F 0%, #07241E 34%, #0B1A17 68%, #0E1216 100%);
}

/* ---------- 品牌首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(18px, 3vw, 30px) 0 clamp(52px, 7vw, 92px);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: -140px -12% auto -12%;
  height: 660px;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(183, 192, 198, .055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(183, 192, 198, .055) 1px, transparent 1px);
  background-size: 62px 62px;
  -webkit-mask-image: radial-gradient(72% 72% at 28% 24%, #000 0%, transparent 78%);
  mask-image: radial-gradient(72% 72% at 28% 24%, #000 0%, transparent 78%);
}

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

.page-about .hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 48px);
  margin-top: clamp(22px, 3.5vw, 40px);
}

.page-about .hero-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(34px, 5.4vw, 62px);
  line-height: 1.08;
  letter-spacing: .01em;
  margin: 14px 0 0;
  color: var(--mist);
  max-width: 20ch;
}

.page-about .hero-copy .lede {
  margin-top: clamp(14px, 2vw, 20px);
}

.page-about .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 30px);
}

/* 悬浮索引卡片 */
.page-about .hero-index {
  align-self: start;
  padding: clamp(16px, 2.4vw, 24px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(160deg, rgba(11, 51, 43, .85), rgba(9, 32, 26, .72));
  box-shadow: var(--shadow-panel);
}

.page-about .hero-index-title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--silver);
}

.page-about .index-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-about .index-link {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 11px 4px;
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  transition: color .22s ease, border-color .22s ease, padding-left .22s ease;
}

.page-about .index-list li:last-child .index-link {
  border-bottom: 0;
}

.page-about .index-link:hover,
.page-about .index-link:focus-visible {
  color: var(--cyan);
  border-color: var(--line-cyan);
  padding-left: 10px;
}

.page-about .index-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--cyan);
  flex: 0 0 auto;
}

.page-about .index-text {
  flex: 1 1 auto;
  font-size: 15px;
}

.page-about .index-arrow {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--silver);
}

/* 首屏数据条 */
.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(28px, 4vw, 48px);
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--line);
  overflow: hidden;
}

.page-about .about-stat {
  padding: clamp(14px, 2vw, 20px);
  background: linear-gradient(170deg, rgba(11, 51, 43, .62), rgba(9, 32, 26, .55));
}

.page-about .about-stat-value {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(20px, 2.6vw, 28px);
  line-height: 1.1;
  letter-spacing: -.02em;
  color: var(--cyan);
}

.page-about .about-stat-value--signal {
  color: var(--orange);
}

.page-about .about-stat-label {
  display: block;
  margin-top: 6px;
  font-size: 12.5px;
  letter-spacing: .02em;
  color: var(--silver);
}

/* ---------- 时间线 ---------- */
.page-about .tl {
  list-style: none;
  margin: clamp(30px, 4vw, 50px) 0 0;
  padding: 0;
}

.page-about .tl-node {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  padding: clamp(22px, 3vw, 30px) 0;
  border-top: 1px solid var(--line);
}

.page-about .tl-node:first-child {
  border-top-color: var(--line-cyan);
}

.page-about .tl-index {
  display: flex;
  align-items: center;
  gap: 10px;
}

.page-about .tl-step {
  font-family: var(--font-mono);
  font-size: clamp(20px, 2.6vw, 28px);
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--cyan);
}

.page-about .tl-node--signal .tl-step {
  color: var(--orange);
}

.page-about .tl-stage {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--silver);
  padding: 3px 9px;
  border: 1px solid var(--line);
  border-radius: 999px;
}

.page-about .tl-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(20px, 2.4vw, 27px);
  line-height: 1.26;
  margin: 0 0 10px;
  color: var(--mist);
}

.page-about .tl-body p {
  margin: 0 0 12px;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.86;
  color: rgba(232, 240, 242, .82);
}

.page-about .tl-body p:last-child {
  margin-bottom: 0;
}

.page-about .tl-figure {
  margin: 18px 0 0;
  border-radius: 14px;
  overflow: hidden;
}

.page-about .tl-figure--wide {
  max-width: 720px;
}

.page-about .tl-figure--tall {
  max-width: 360px;
}

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

/* ---------- 团队 ---------- */
.page-about .team-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 52px);
  margin-top: clamp(28px, 4vw, 46px);
}

.page-about .team-figure {
  margin: 0;
  border-radius: 16px;
  overflow: hidden;
}

.page-about .team-roles {
  display: grid;
  gap: 0;
}

.page-about .role {
  padding: clamp(18px, 2.4vw, 26px) 0;
  border-top: 1px solid var(--line);
}

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

.page-about .role-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: end;
  gap: 14px;
  margin-bottom: 10px;
}

.page-about .role-num {
  font-family: var(--font-mono);
  font-size: clamp(30px, 4.4vw, 48px);
  line-height: .95;
  letter-spacing: -.04em;
  color: var(--cyan);
}

.page-about .role:nth-child(2) .role-num {
  color: var(--orange);
}

.page-about .role:nth-child(3) .role-num {
  color: var(--silver);
}

.page-about .role-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(17px, 2vw, 21px);
  margin: 0;
  color: var(--mist);
}

.page-about .role p {
  margin: 0;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.86;
  color: rgba(232, 240, 242, .8);
}

/* ---------- 比赛日节奏 ---------- */
.page-about .rhythm-panel {
  margin-top: clamp(28px, 4vw, 46px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(155deg, rgba(11, 51, 43, .72), rgba(9, 32, 26, .6));
  box-shadow: var(--shadow-panel);
  overflow: hidden;
}

.page-about .rhythm-panel .panel-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  padding: clamp(16px, 2.2vw, 22px) clamp(16px, 2.6vw, 28px);
  border-bottom: 1px solid var(--line);
}

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

.page-about .rhythm-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: clamp(14px, 2vw, 20px) clamp(16px, 2.6vw, 28px);
  border-bottom: 1px solid var(--line);
  transition: background .25s ease;
}

.page-about .rhythm-row:last-child {
  border-bottom: 0;
}

.page-about .rhythm-row:hover {
  background: rgba(35, 240, 199, .05);
}

.page-about .rhythm-time {
  font-family: var(--font-mono);
  font-size: 13.5px;
  letter-spacing: .04em;
  color: var(--cyan);
}

.page-about .rhythm-row--signal .rhythm-time {
  color: var(--orange);
}

.page-about .rhythm-desc {
  font-size: 15px;
  line-height: 1.82;
  color: rgba(232, 240, 242, .82);
}

/* ---------- 服务与流程 ---------- */
.page-about .svc-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(14px, 2vw, 20px);
  margin-top: clamp(28px, 4vw, 46px);
}

.page-about .svc-card {
  position: relative;
  padding: clamp(20px, 2.6vw, 28px);
  border: 1px solid var(--line);
  border-radius: 16px;
  background: linear-gradient(160deg, rgba(11, 51, 43, .62), rgba(9, 32, 26, .5));
  transition: border-color .25s ease, box-shadow .25s ease;
}

.page-about .svc-card:hover,
.page-about .svc-card:focus-within {
  border-color: var(--line-cyan);
  box-shadow: 0 26px 52px -42px rgba(35, 240, 199, .85);
}

.page-about .svc-tag {
  display: inline-block;
  margin-bottom: 14px;
  padding: 3px 9px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--orange);
  border: 1px solid rgba(255, 122, 26, .35);
  border-radius: 999px;
}

.page-about .svc-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(19px, 2.2vw, 24px);
  margin: 0 0 10px;
  color: var(--mist);
}

.page-about .svc-card p {
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.84;
  color: rgba(232, 240, 242, .8);
}

.page-about .svc-fit {
  display: block;
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--silver);
}

.page-about .svc-fit strong {
  color: var(--cyan);
  font-weight: 600;
}

.page-about .flow {
  list-style: none;
  margin: clamp(24px, 3.5vw, 40px) 0 0;
  padding: clamp(18px, 2.4vw, 26px);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(14px, 2vw, 20px);
  border: 1px solid var(--line);
  border-radius: 16px;
  background: linear-gradient(120deg, rgba(35, 240, 199, .05), rgba(255, 122, 26, .04));
}

.page-about .flow-step {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-about .flow-num {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .16em;
  color: var(--cyan);
}

.page-about .flow-label {
  font-size: 14.5px;
  line-height: 1.5;
  color: var(--mist);
}

/* ---------- 合作生态 ---------- */
.page-about .eco-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin-top: clamp(26px, 4vw, 44px);
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--line);
  overflow: hidden;
}

.page-about .eco-item {
  padding: clamp(18px, 2.6vw, 28px);
  background: linear-gradient(170deg, rgba(11, 51, 43, .58), rgba(9, 32, 26, .54));
  transition: background .25s ease;
}

.page-about .eco-item:hover {
  background: rgba(35, 240, 199, .06);
}

.page-about .eco-num {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .16em;
  color: var(--orange);
}

.page-about .eco-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(17px, 2vw, 21px);
  margin: 0 0 8px;
  color: var(--mist);
}

.page-about .eco-item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.84;
  color: rgba(232, 240, 242, .78);
}

/* ---------- 长期运营数据 ---------- */
.page-about .track {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 50px);
  align-items: center;
}

.page-about .track-copy p {
  margin: 0 0 12px;
  max-width: 60ch;
  font-size: 15.5px;
  line-height: 1.88;
  color: rgba(232, 240, 242, .82);
}

.page-about .track-copy .note {
  margin-bottom: 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--silver);
}

.page-about .track-stats {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .track-cell {
  padding: clamp(16px, 2vw, 22px);
  border: 1px solid var(--line);
  border-radius: 14px;
  background: linear-gradient(165deg, rgba(11, 51, 43, .62), rgba(9, 32, 26, .46));
}

.page-about .track-value {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.2vw, 34px);
  line-height: 1.05;
  letter-spacing: -.03em;
  color: var(--cyan);
}

.page-about .track-cell:nth-child(2) .track-value {
  color: var(--orange);
}

.page-about .track-cell:nth-child(3) .track-value {
  color: var(--silver);
}

.page-about .track-label {
  display: block;
  margin-top: 8px;
  font-size: 12.5px;
  letter-spacing: .02em;
  color: var(--silver);
}

/* ---------- 结尾行动区 ---------- */
.page-about .about-cta {
  position: relative;
  padding: clamp(26px, 4vw, 48px);
  border: 1px solid var(--line-cyan);
  border-radius: var(--radius);
  overflow: hidden;
  background:
    radial-gradient(620px 240px at 10% 0%, rgba(35, 240, 199, .12), transparent 70%),
    linear-gradient(140deg, rgba(11, 51, 43, .82), rgba(9, 32, 26, .7));
}

.page-about .about-cta h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(22px, 3vw, 34px);
  line-height: 1.2;
  margin: 0 0 12px;
  color: var(--mist);
}

.page-about .about-cta p {
  margin: 0;
  max-width: 64ch;
  font-size: 15.5px;
  line-height: 1.86;
  color: rgba(232, 240, 242, .82);
}

.page-about .about-cta .cta-contact {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.7;
  color: var(--silver);
}

.page-about .about-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(18px, 2.6vw, 28px);
}

/* ---------- 进入视野的短促位移 ---------- */
.page-about [data-reveal] {
  opacity: 1;
  transform: none;
}

.js-ready .page-about [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity .6s ease, transform .6s ease;
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 600px) {
  .page-about .track-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

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

@media (min-width: 760px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 820px) {
  .page-about .rhythm-row {
    grid-template-columns: 190px minmax(0, 1fr);
    gap: clamp(18px, 3vw, 36px);
    align-items: baseline;
  }
}

@media (min-width: 860px) {
  .page-about .flow {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }
}

@media (min-width: 940px) {
  .page-about .tl {
    margin-left: 8px;
    padding-left: clamp(24px, 3.4vw, 46px);
    border-left: 1px solid var(--line);
  }

  .page-about .tl-node {
    grid-template-columns: 150px minmax(0, 1fr);
    gap: clamp(26px, 4vw, 54px);
    padding: clamp(26px, 3.2vw, 38px) 0;
  }

  .page-about .tl-node::before {
    content: "";
    position: absolute;
    left: calc(-1 * clamp(24px, 3.4vw, 46px));
    top: clamp(34px, 4vw, 46px);
    width: 8px;
    height: 8px;
    background: var(--cyan);
    transform: translate(-50%, 0) rotate(45deg);
    box-shadow: 0 0 14px rgba(35, 240, 199, .8);
  }

  .page-about .tl-node--signal::before {
    background: var(--orange);
    box-shadow: 0 0 14px rgba(255, 122, 26, .8);
  }

  .page-about .tl-index {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
}

@media (min-width: 960px) {
  .page-about .hero-grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, .88fr);
    align-items: start;
  }

  .page-about .team-layout {
    grid-template-columns: minmax(0, .92fr) minmax(0, 1.08fr);
    align-items: start;
  }

  .page-about .track {
    grid-template-columns: minmax(0, 1fr) minmax(0, .88fr);
  }
}

@media (min-width: 1080px) {
  .page-about .svc-grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
  }

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

  .page-about .svc-card:nth-child(2) {
    grid-column: 8 / span 5;
  }

  .page-about .svc-card:nth-child(3) {
    grid-column: 1 / span 5;
  }

  .page-about .svc-card:nth-child(4) {
    grid-column: 6 / span 7;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about [data-reveal],
  .js-ready .page-about [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .page-about .index-link,
  .page-about .rhythm-row,
  .page-about .svc-card,
  .page-about .eco-item {
    transition: none;
  }
}