.page-about {
  --about-edge: rgba(154, 166, 194, 0.16);
  --about-soft: rgba(154, 166, 194, 0.62);
  position: relative;
  overflow-x: clip;
  background: var(--ink);
  color: var(--mist);
  font-family: var(--font-sans);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(44px, 8vw, 104px) 0 clamp(28px, 5vw, 56px);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -18%;
  left: -12%;
  right: -12%;
  height: 66%;
  background: linear-gradient(
    104deg,
    rgba(53, 231, 224, 0.18) 0%,
    rgba(7, 11, 28, 0) 42%,
    rgba(246, 179, 60, 0.14) 78%,
    rgba(255, 77, 141, 0.1) 100%
  );
  transform: skewY(-6deg);
  pointer-events: none;
}

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

.page-about .about-kicker {
  margin: 20px 0 14px;
  color: var(--cyan);
}

.page-about .about-hero-title {
  margin: 0;
  max-width: 18ch;
  color: var(--paper);
  text-transform: none;
}

.page-about .about-lede {
  margin: 22px 0 0;
  max-width: 54ch;
  font-size: clamp(15px, 1.5vw, 18px);
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-about .about-hero-media {
  position: relative;
  margin: clamp(32px, 5vw, 56px) 0 0;
  padding: 0 var(--gutter);
}

.page-about .about-hero-media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: var(--shell);
  margin: 0 auto;
  object-fit: cover;
  border-radius: var(--r-l);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 34px) 100%, 0 100%);
  border: 1px solid var(--line-cyan);
}

.page-about .about-hero-caption {
  max-width: var(--shell);
  margin: 14px auto 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--about-soft);
}

/* ---------- 通用小节 ---------- */
.page-about .about-section-lede {
  margin: 16px 0 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--about-soft);
}

.page-about .about-timeline-section .display-2,
.page-about .about-scale .display-2,
.page-about .about-partners .display-2,
.page-about .about-awards .display-2,
.page-about .about-paths .display-2 {
  margin: 12px 0 0;
  max-width: 22ch;
  color: var(--paper);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: clamp(30px, 5vw, 50px) 0 0;
  padding: 0;
  position: relative;
}

.page-about .about-timeline--cont {
  margin-top: clamp(22px, 4vw, 34px);
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  background: linear-gradient(180deg, var(--gold) 0%, var(--cyan) 52%, rgba(53, 231, 224, 0.08) 100%);
  border-radius: 2px;
}

.page-about .about-node {
  position: relative;
  padding-left: 40px;
  margin-bottom: 14px;
}

.page-about .about-node:last-child {
  margin-bottom: 0;
}

.page-about .about-node-details {
  border: 1px solid var(--about-edge);
  border-radius: var(--r-s);
  background: var(--ink-2);
  transition: border-color var(--dur-2) var(--ease), background-color var(--dur-2) var(--ease);
}

.page-about .about-node-details:hover {
  border-color: var(--line-cyan);
}

.page-about .about-node-details[open] {
  border-color: rgba(53, 231, 224, 0.42);
  background: linear-gradient(180deg, rgba(53, 231, 224, 0.07) 0%, rgba(14, 23, 56, 0.9) 100%);
}

.page-about .about-node-summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 14px;
  padding: 16px 44px 16px 18px;
  cursor: pointer;
  list-style: none;
  position: relative;
}

.page-about .about-node-summary::-webkit-details-marker {
  display: none;
}

.page-about .about-node-summary::after {
  content: "+";
  position: absolute;
  right: 18px;
  top: 14px;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--gold);
}

.page-about .about-node-details[open] .about-node-summary::after {
  content: "−";
  color: var(--cyan);
}

.page-about .about-node-dot {
  position: absolute;
  left: 0;
  top: 20px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--gold);
  box-shadow: 0 0 0 4px rgba(246, 179, 60, 0.12);
}

.page-about .about-node-dot::after {
  content: "";
  position: absolute;
  inset: 4px;
  border-radius: 50%;
  background: var(--cyan);
}

.page-about .about-node-era {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-about .about-node-title {
  font-size: clamp(16px, 1.7vw, 20px);
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-about .about-node-body {
  padding: 0 18px 18px;
}

.page-about .about-node-body p {
  margin: 0;
  max-width: 60ch;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--about-soft);
}

.page-about .about-timeline-media {
  margin: clamp(26px, 4vw, 40px) 0 0;
  border-radius: var(--r-s);
  overflow: hidden;
  border: 1px solid var(--about-edge);
}

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

/* ---------- 团队 ---------- */
.page-about .about-team-panel {
  padding: clamp(22px, 4vw, 44px);
  border-radius: var(--bevel);
  position: relative;
}

.page-about .about-ink {
  color: var(--ink-text);
}

.page-about .about-label-ink {
  color: var(--gold-deep);
  margin: 0 0 10px;
}

.page-about .about-ink-soft {
  color: #4a453d;
}

.page-about .about-team-head .display-2 {
  margin: 0;
  max-width: 22ch;
}

.page-about .about-body {
  margin: 16px 0 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.85;
}

.page-about .about-team-grid {
  display: grid;
  gap: 18px;
  margin-top: clamp(24px, 4vw, 38px);
}

.page-about .about-team-card {
  padding: 20px 18px;
  border-radius: var(--r-s);
  background: rgba(18, 16, 14, 0.045);
  border-left: 3px solid var(--gold-deep);
}

.page-about .about-team-num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(34px, 5vw, 46px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--ink-text);
}

.page-about .about-team-name {
  margin: 10px 0 0;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--ink-text);
}

.page-about .about-team-text {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: #4a453d;
}

.page-about .about-team-media {
  margin: clamp(24px, 4vw, 36px) 0 0;
  border-radius: var(--r-s);
  overflow: hidden;
  max-height: 320px;
}

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

/* ---------- 覆盖规模 ---------- */
.page-about .about-scale-grid {
  display: grid;
  gap: 22px;
  margin-top: clamp(30px, 5vw, 48px);
}

.page-about .about-scale-item {
  padding: 22px 20px;
  border-radius: var(--r-s);
  border: 1px solid var(--about-edge);
  background: linear-gradient(160deg, var(--ink-2) 0%, rgba(7, 11, 28, 0.9) 100%);
  clip-path: polygon(0 0, calc(100% - 22px) 0, 100% 22px, 100% 100%, 0 100%);
}

.page-about .about-scale-figure {
  display: grid;
  place-items: center;
  width: 118px;
  height: 118px;
  border-radius: 50%;
  background: conic-gradient(from -90deg, var(--cyan) 0%, var(--cyan-soft) 30%, var(--gold-deep) 62%, rgba(154, 166, 194, 0.14) 100%);
  position: relative;
}

.page-about .about-scale-figure::before {
  content: "";
  position: absolute;
  inset: 7px;
  border-radius: 50%;
  background: var(--ink-2);
}

.page-about .about-scale-num {
  position: relative;
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .about-scale-name {
  margin: 16px 0 0;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

.page-about .about-scale-item p {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--about-soft);
}

.page-about .about-scale-note {
  margin: clamp(24px, 4vw, 36px) 0 0;
  padding-left: 16px;
  border-left: 2px solid var(--gold);
  max-width: 62ch;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--mist);
}

/* ---------- 合作方条带 ---------- */
.page-about .about-rail-wrap {
  margin-top: clamp(24px, 4vw, 38px);
  overflow-x: auto;
  overflow-y: hidden;
  padding: 4px var(--gutter) 18px;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-rail {
  display: flex;
  gap: 14px;
  list-style: none;
  margin: 0;
  padding: 0;
  width: max-content;
}

.page-about .about-rail-item {
  scroll-snap-align: start;
  flex: 0 0 auto;
  width: min(78vw, 288px);
  padding: 18px 18px 20px;
  border-radius: var(--r-s);
  border: 1px solid var(--about-edge);
  border-top: 2px solid var(--cyan);
  background: var(--ink-2);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-about .about-rail-item:nth-child(3n + 2) {
  border-top-color: var(--gold);
}

.page-about .about-rail-item:nth-child(3n + 3) {
  border-top-color: var(--magenta);
}

.page-about .about-rail-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--about-soft);
}

.page-about .about-rail-name {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.03em;
  color: var(--paper);
}

.page-about .about-rail-desc {
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--about-soft);
}

.page-about .about-rail-hint {
  margin: 0;
  padding: 0 var(--gutter);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--about-soft);
}

/* ---------- 认可与榜单 ---------- */
.page-about .about-awards-inner {
  display: grid;
  gap: 26px;
  padding: clamp(22px, 4vw, 40px);
  border-radius: var(--bevel);
  border: 1px solid var(--line-cyan);
  background:
    radial-gradient(120% 90% at 8% 0%, rgba(53, 231, 224, 0.12) 0%, rgba(7, 11, 28, 0) 58%),
    radial-gradient(90% 80% at 96% 100%, rgba(246, 179, 60, 0.12) 0%, rgba(7, 11, 28, 0) 62%),
    var(--ink-2);
}

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

.page-about .about-awards-item {
  display: grid;
  gap: 6px;
  padding: 14px 0;
  border-bottom: 1px solid var(--about-edge);
}

.page-about .about-awards-item:last-child {
  border-bottom: 0;
}

.page-about .about-awards-year {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--gold);
}

.page-about .about-awards-text {
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 使用路径 ---------- */
.page-about .about-paths-grid {
  display: grid;
  gap: 18px;
  margin-top: clamp(28px, 5vw, 44px);
}

.page-about .about-path {
  display: flex;
  flex-direction: column;
  padding: 22px 20px 24px;
  border-radius: var(--r-s);
  border: 1px solid var(--about-edge);
  background: var(--ink-2);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%);
}

.page-about .about-path-tag {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--magenta);
}

.page-about .about-path-name {
  margin: 12px 0 0;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.45;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-about .about-path p:not(.about-path-tag) {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--about-soft);
}

.page-about .about-path-link {
  margin-top: 18px;
  align-self: flex-start;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 231, 224, 0.35);
  padding-bottom: 2px;
  transition: color var(--dur-2) var(--ease), border-color var(--dur-2) var(--ease);
}

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

/* ---------- 收尾 ---------- */
.page-about .about-cta-panel {
  padding: clamp(24px, 4vw, 48px);
  border-radius: var(--bevel);
  background: linear-gradient(120deg, var(--ink-2) 0%, #131f47 100%);
  border: 1px solid var(--line-cyan);
}

.page-about .about-cta-title {
  margin: 0;
  color: var(--paper);
}

.page-about .about-cta-text {
  margin: 16px 0 0;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--about-soft);
}

.page-about .about-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-team-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-about .about-scale-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
  }

  .page-about .about-awards-inner {
    grid-template-columns: 1fr 1fr;
    align-items: start;
    gap: 40px;
  }

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

@media (min-width: 960px) {
  .page-about .about-node {
    padding-left: 48px;
  }

  .page-about .about-node:nth-child(even) {
    margin-left: clamp(24px, 7%, 92px);
  }

  .page-about .about-node:nth-child(odd) {
    margin-right: clamp(24px, 7%, 92px);
  }

  .page-about .about-timeline-media {
    margin-top: clamp(34px, 4vw, 52px);
  }

  .page-about .about-paths-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-about .about-rail-item {
    width: 320px;
  }
}

@media (min-width: 1200px) {
  .page-about .about-hero-media img {
    clip-path: polygon(0 0, 100% 0, 100% calc(100% - 34px), calc(100% - 46px) 100%, 0 100%);
  }

  .page-about .about-team-panel {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.72fr);
    grid-template-areas:
      "head media"
      "grid media";
    gap: 0 clamp(28px, 4vw, 56px);
    align-items: start;
  }

  .page-about .about-team-head {
    grid-area: head;
  }

  .page-about .about-team-grid {
    grid-area: grid;
    grid-template-columns: 1fr;
    margin-top: 28px;
  }

  .page-about .about-team-media {
    grid-area: media;
    margin-top: 0;
    max-height: 520px;
    align-self: stretch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-node-details,
  .page-about .about-path-link {
    transition: none;
  }
}