.page-about {
  --about-card: rgba(26, 16, 56, 0.72);
  --about-axis: rgba(51, 217, 255, 0.4);
}

/* ---------- 首屏拼贴 ---------- */
.page-about .about-hero {
  position: relative;
  padding-top: clamp(24px, 5vw, 44px);
  padding-bottom: clamp(36px, 7vw, 72px);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -30%;
  left: -10%;
  right: -10%;
  height: 620px;
  background:
    radial-gradient(620px 340px at 78% 20%, var(--glow-violet), transparent 70%),
    radial-gradient(460px 280px at 10% 48%, var(--glow-blue), transparent 70%);
  pointer-events: none;
  z-index: 0;
}

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

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 36px);
  align-items: start;
  margin-top: clamp(18px, 3vw, 28px);
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.2rem, 7vw, 4.1rem);
  line-height: 1.06;
  letter-spacing: -0.01em;
  margin: 0.5rem 0 1rem;
  color: var(--text-primary);
}

.page-about .about-hero__lead .lede {
  max-width: 46ch;
}

.page-about .about-status {
  background: linear-gradient(160deg, rgba(26, 16, 56, 0.92), rgba(16, 10, 34, 0.88));
  border: 1px solid var(--ink-600);
  border-radius: var(--radius-card);
  padding: clamp(20px, 4vw, 28px);
  box-shadow: 0 0 0 1px rgba(164, 75, 255, 0.08), 0 24px 50px -34px var(--glow-violet);
}

.page-about .about-status__kicker {
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  color: var(--electric-blue);
  margin: 0;
}

.page-about .about-status__line {
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 3.4vw, 1.7rem);
  font-weight: 900;
  line-height: 1.2;
  color: var(--text-primary);
  margin: 0.55rem 0 0.9rem;
}

.page-about .about-status__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 1.2rem;
}

.page-about .about-status__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 12px;
  margin: 0;
  padding-top: 16px;
  border-top: 1px solid var(--ink-600);
}

.page-about .about-status__fact {
  margin: 0;
}

.page-about .about-status__fact dt {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.page-about .about-status__fact dd {
  margin: 0;
  font-size: 1rem;
  color: var(--warm-gold);
}

/* ---------- 起点 ---------- */
.page-about .about-origin__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 48px);
  margin-top: clamp(20px, 3vw, 32px);
}

.page-about .about-origin__copy p {
  margin: 0 0 1rem;
  color: var(--text-primary);
  line-height: 1.75;
}

.page-about .about-chain {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-chain__item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px 18px;
  border: 1px solid var(--ink-600);
  border-radius: var(--radius-soft);
  background: rgba(16, 10, 34, 0.66);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .about-chain__item:hover {
  border-color: rgba(51, 217, 255, 0.5);
  transform: translateY(-2px);
}

.page-about .about-chain__no {
  font-size: 0.9rem;
  color: var(--warm-gold);
  padding-top: 2px;
}

.page-about .about-chain__text h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin: 0 0 4px;
  color: var(--text-primary);
}

.page-about .about-chain__text p {
  margin: 0;
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ---------- 时间线 ---------- */
.page-about .about-track__media {
  margin: clamp(20px, 3vw, 32px) 0 0;
}

.page-about .about-track {
  position: relative;
  margin-top: clamp(28px, 5vw, 48px);
  padding-left: 34px;
}

.page-about .about-track::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--electric-blue), rgba(51, 217, 255, 0.1));
  box-shadow: 0 0 14px var(--glow-blue);
}

.page-about .about-stage {
  position: relative;
  margin: 0 0 18px;
  border: 1px solid var(--ink-600);
  border-radius: var(--radius-card);
  background: var(--about-card);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

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

.page-about .about-stage::before {
  content: "";
  position: absolute;
  left: -33px;
  top: 26px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--warm-gold);
  box-shadow: 0 0 0 4px rgba(255, 194, 75, 0.14), 0 0 16px rgba(255, 194, 75, 0.5);
}

.page-about .about-stage:hover {
  border-color: rgba(164, 75, 255, 0.55);
  transform: translateY(-2px);
  box-shadow: 0 22px 44px -34px var(--glow-violet);
}

.page-about .about-stage .entry__head {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 18px 20px;
}

.page-about .about-stage .entry__no {
  font-size: 1.05rem;
  color: var(--warm-gold);
  padding-top: 3px;
}

.page-about .about-stage__main {
  flex: 1 1 auto;
  min-width: 0;
}

.page-about .about-stage .entry__title {
  font-size: 1.15rem;
  font-weight: 700;
  margin: 0 0 4px;
  color: var(--text-primary);
}

.page-about .about-stage .entry__meta {
  margin: 0;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.page-about .about-stage .entry__body {
  padding: 0 20px 20px 52px;
}

.page-about .about-stage .entry__body p {
  margin: 0;
  color: var(--text-muted);
  line-height: 1.7;
  border-top: 1px solid var(--ink-600);
  padding-top: 14px;
}

/* ---------- 团队 ---------- */
.page-about .about-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 4vw, 36px);
  margin-top: clamp(20px, 3vw, 32px);
}

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

.page-about .about-role {
  padding: 22px;
  background: rgba(16, 10, 34, 0.66);
  border-radius: var(--radius-card);
}

.page-about .about-role__no {
  display: inline-block;
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  color: var(--coral);
  margin-bottom: 8px;
}

.page-about .about-role p {
  margin: 0 0 14px;
  color: var(--text-muted);
  line-height: 1.7;
  font-size: 0.96rem;
}

.page-about .about-role__list {
  list-style: none;
  margin: 0 0 16px;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about .about-role__list li {
  position: relative;
  padding-left: 18px;
  font-size: 0.92rem;
  color: var(--text-primary);
}

.page-about .about-role__list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 0.55em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--electric-blue);
}

.page-about .about-role .link-arrow {
  transition: color var(--dur) var(--ease);
}

.page-about .about-role:hover .link-arrow {
  color: var(--electric-blue);
}

.page-about .about-team__media {
  margin: 0;
}

/* ---------- 服务半径 ---------- */
.page-about .about-radius__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 4vw, 40px);
  align-items: center;
  margin-top: clamp(20px, 3vw, 32px);
}

.page-about .about-radius__copy p {
  margin: 0 0 1rem;
  color: var(--text-primary);
  line-height: 1.75;
}

.page-about .about-radius__list {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-radius__list li {
  display: flex;
  gap: 12px;
  align-items: baseline;
  font-size: 0.95rem;
  color: var(--text-muted);
  border-left: 1px solid var(--ink-600);
  padding-left: 14px;
}

.page-about .about-radius__list .mono {
  color: var(--warm-gold);
  font-size: 0.85rem;
}

.page-about .about-radius__map {
  display: flex;
  justify-content: center;
}

.page-about .about-radius__svg {
  width: 100%;
  max-width: 420px;
  height: auto;
  display: block;
}

.page-about .about-ring {
  fill: none;
  stroke: rgba(43, 26, 85, 0.95);
  stroke-width: 1;
}

.page-about .about-ring:nth-of-type(3) {
  stroke-dasharray: 3 7;
}

.page-about .about-ring:nth-of-type(4) {
  stroke-dasharray: 2 10;
}

.page-about .about-core {
  fill: var(--warm-gold);
}

.page-about .about-node {
  outline: none;
}

.page-about .about-node__dot {
  fill: var(--electric-blue);
  transition: r var(--dur) var(--ease);
}

.page-about .about-node:hover .about-node__dot,
.page-about .about-node:focus .about-node__dot {
  fill: var(--neon-violet);
}

.page-about .about-node__tip {
  fill: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 14px;
  opacity: 0;
  transition: opacity 140ms var(--ease);
}

.page-about .about-node__tip--end {
  text-anchor: end;
}

.page-about .about-node:hover .about-node__tip,
.page-about .about-node:focus .about-node__tip {
  opacity: 1;
}

.page-about .about-radius__media {
  margin: clamp(26px, 5vw, 44px) 0 0;
}

/* ---------- 合作生态 ---------- */
.page-about .about-partners__types {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: clamp(20px, 3vw, 32px);
}

.page-about .about-type {
  padding: 22px;
  border: 1px solid var(--ink-600);
  border-radius: var(--radius-card);
  background: linear-gradient(165deg, rgba(26, 16, 56, 0.7), rgba(16, 10, 34, 0.6));
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .about-type:hover {
  border-color: rgba(255, 107, 90, 0.5);
  transform: translateY(-2px);
}

.page-about .about-type__no {
  font-size: 0.85rem;
  color: var(--coral);
  letter-spacing: 0.1em;
}

.page-about .about-type h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin: 10px 0 8px;
  color: var(--text-primary);
}

.page-about .about-type p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.7;
  color: var(--text-muted);
}

.page-about .about-flow {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin: clamp(24px, 4vw, 36px) 0 0;
  padding: 0;
}

.page-about .about-flow__step {
  position: relative;
  border-top: 1px solid var(--ink-600);
  padding-top: 14px;
}

.page-about .about-flow__step::after {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 32px;
  height: 1px;
  background: var(--neon-violet);
}

.page-about .about-flow__no {
  display: block;
  font-size: 0.82rem;
  color: var(--electric-blue);
  margin-bottom: 6px;
}

.page-about .about-flow__step p {
  margin: 0;
  font-size: 0.94rem;
  color: var(--text-primary);
  line-height: 1.6;
}

.page-about .about-partners .note {
  margin: clamp(22px, 4vw, 32px) 0 18px;
}

/* ---------- 承诺 ---------- */
.page-about .about-promise__list {
  list-style: none;
  margin: clamp(20px, 3vw, 32px) 0 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-about .about-promise__item {
  display: flex;
  gap: clamp(16px, 3vw, 30px);
  align-items: flex-start;
  padding: clamp(20px, 3vw, 28px) 0;
  border-bottom: 1px solid var(--ink-600);
}

.page-about .about-promise__item:first-child {
  border-top: 1px solid var(--ink-600);
}

.page-about .about-promise__no {
  font-family: var(--font-mono);
  font-size: clamp(1.3rem, 4vw, 2rem);
  color: var(--warm-gold);
  line-height: 1;
  min-width: 2.6ch;
}

.page-about .about-promise__item h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin: 0 0 8px;
  color: var(--text-primary);
}

.page-about .about-promise__item p {
  margin: 0;
  color: var(--text-muted);
  line-height: 1.75;
  font-size: 0.96rem;
}

/* ---------- 收口 ---------- */
.page-about .about-cta {
  padding-bottom: clamp(48px, 8vw, 88px);
}

.page-about .about-cta__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
  align-items: center;
  padding: clamp(24px, 4vw, 40px);
  border: 1px solid var(--ink-600);
  border-radius: var(--radius-card);
  background:
    radial-gradient(520px 260px at 12% 0%, var(--glow-violet), transparent 70%),
    linear-gradient(150deg, rgba(26, 16, 56, 0.9), rgba(8, 6, 15, 0.85));
}

.page-about .about-cta__copy h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.5rem, 4.2vw, 2.3rem);
  line-height: 1.15;
  margin: 0 0 10px;
  color: var(--text-primary);
}

.page-about .about-cta__copy p {
  margin: 0;
  color: var(--text-muted);
  line-height: 1.7;
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: clamp(28px, 4vw, 48px);
  }

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

  .page-about .about-role:nth-child(2) {
    margin-top: 30px;
  }

  .page-about .about-role--wide {
    grid-column: 1 / -1;
    margin-top: 6px;
  }

  .page-about .about-partners__types {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
  }

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

@media (min-width: 900px) {
  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: clamp(32px, 5vw, 64px);
    align-items: start;
  }

  .page-about .about-track {
    padding-left: 0;
  }

  .page-about .about-track::before {
    left: 50%;
    transform: translateX(-0.5px);
  }

  .page-about .about-stage {
    width: calc(50% - 42px);
  }

  .page-about .about-stage:nth-child(even) {
    margin-left: auto;
  }

  .page-about .about-stage::before {
    left: -48px;
  }

  .page-about .about-stage:nth-child(even)::before {
    left: auto;
    right: -48px;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr);
    align-items: start;
  }

  .page-about .about-radius__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.95fr);
    gap: clamp(32px, 5vw, 56px);
  }

  .page-about .about-radius__copy {
    order: 1;
  }

  .page-about .about-radius__map {
    order: 2;
  }

  .page-about .about-promise__item {
    padding: clamp(24px, 3vw, 34px) 0;
  }
}

@media (min-width: 1100px) {
  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.7fr);
  }
}