.page-about {
  --about-radius: 2px;
  --about-pad: clamp(20px, 5vw, 36px);
  display: block;
  padding-bottom: clamp(56px, 9vw, 104px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(104px, 16vw, 156px) 0 clamp(36px, 6vw, 60px);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(90deg, rgba(35, 36, 58, .85) 1px, transparent 1px),
    linear-gradient(180deg, rgba(35, 36, 58, .85) 1px, transparent 1px);
  background-size: 32px 32px;
  -webkit-mask-image: radial-gradient(120% 88% at 18% 0%, #000 0%, transparent 74%);
  mask-image: radial-gradient(120% 88% at 18% 0%, #000 0%, transparent 74%);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  top: -180px;
  left: -140px;
  width: min(560px, 90vw);
  height: min(560px, 90vw);
  background: radial-gradient(circle, rgba(124, 77, 255, .28), transparent 66%);
  pointer-events: none;
}

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

.page-about .breadcrumb {
  margin-bottom: clamp(20px, 4vw, 32px);
}

.page-about .breadcrumb ul {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--muted);
}

.page-about .breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--line);
}

.page-about .breadcrumb a {
  color: var(--muted);
  text-decoration: none;
}

.page-about .breadcrumb a:hover {
  color: var(--cyan);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(28px, 5vw, 48px);
}

@media (min-width: 960px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.42fr) minmax(0, 1fr);
    align-items: end;
  }
}

.page-about .about-hero h1 {
  margin: 14px 0 20px;
  font-size: clamp(30px, 7.2vw, 60px);
  line-height: 1.08;
  letter-spacing: -.015em;
  transform: skewX(-2deg);
  transform-origin: left bottom;
}

.page-about .about-hero__lead {
  max-width: 62ch;
  font-size: clamp(15.5px, 1.6vw, 17px);
  line-height: 1.78;
  color: var(--text);
}

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

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

.page-about .about-fact {
  background: var(--panel);
  padding: 18px 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-fact dt {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-about .about-fact dd {
  margin: 0;
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.page-about .about-fact__num {
  font-size: clamp(24px, 4.6vw, 34px);
  font-weight: 700;
  color: var(--cyan);
  line-height: 1;
}

.page-about .about-fact__unit {
  font-size: 13px;
  color: var(--muted);
}

/* ---------- 通用章节 ---------- */
.page-about .about-section {
  position: relative;
  padding: clamp(40px, 7vw, 72px) 0 0;
}

.page-about .about-section--last {
  padding-bottom: 0;
}

.page-about .about-section__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: start;
  gap: 14px 18px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
  margin-bottom: clamp(24px, 4vw, 34px);
}

.page-about .about-section__num {
  display: inline-block;
  padding: 5px 9px;
  border: 1px solid var(--line);
  border-radius: var(--about-radius);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--violet);
  background: rgba(124, 77, 255, .08);
}

.page-about .about-section__head h2 {
  margin: 0;
  font-size: clamp(22px, 4.6vw, 34px);
  line-height: 1.22;
  letter-spacing: -.012em;
  transform: skewX(-2deg);
  transform-origin: left bottom;
}

.page-about .about-section__sub {
  grid-column: 1 / -1;
  margin: 0;
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.7;
}

@media (min-width: 760px) {
  .page-about .about-section__head {
    grid-template-columns: auto minmax(0, 1fr);
    align-items: baseline;
  }
  .page-about .about-section__sub {
    grid-column: 2 / 3;
  }
}

.page-about .eyebrow {
  margin: 0;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--violet);
}

/* ---------- 01 服务对象 ---------- */
.page-about .about-serve {
  display: grid;
  gap: 20px;
}

@media (min-width: 900px) {
  .page-about .about-serve {
    grid-template-columns: minmax(0, 1.24fr) minmax(0, 1fr);
    align-items: start;
  }
}

.page-about .about-serve__card {
  position: relative;
  padding: clamp(22px, 3.4vw, 30px) clamp(20px, 3vw, 26px);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--about-radius);
  overflow: hidden;
}

.page-about .about-serve__card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--cyan);
}

.page-about .about-serve__card--partners::before {
  background: var(--orange);
}

.page-about .about-serve__card--partners {
  background: linear-gradient(160deg, var(--violet-wash), var(--panel) 62%);
}

.page-about .about-serve__card h3 {
  margin: 12px 0 10px;
  font-size: clamp(19px, 2.6vw, 23px);
  line-height: 1.3;
}

.page-about .about-serve__card > p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.75;
}

.page-about .about-list {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 11px;
}

.page-about .about-list li {
  position: relative;
  padding-left: 20px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text);
}

.page-about .about-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .58em;
  width: 8px;
  height: 8px;
  background: var(--cyan);
}

.page-about .about-serve__card--partners .about-list li::before {
  background: var(--orange);
}

.page-about .about-list--violet li::before {
  background: var(--violet);
}

.page-about .about-aside {
  margin-top: 20px;
  padding: 16px 18px;
  border-left: 2px solid var(--cyan);
  background: rgba(0, 229, 199, .05);
  max-width: 100%;
}

@media (min-width: 900px) {
  .page-about .about-aside {
    max-width: 420px;
    margin-left: auto;
  }
}

.page-about .about-aside__k {
  margin: 0 0 6px;
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--cyan);
}

.page-about .about-aside p:last-child {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 02 时间轴 ---------- */
.page-about .timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 22px;
}

.page-about .timeline__item {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

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

.page-about .timeline__dot {
  width: 9px;
  height: 9px;
  flex: none;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(0, 229, 199, .14);
}

.page-about .timeline__year {
  font-size: 12.5px;
  letter-spacing: .12em;
  color: var(--cyan);
}

.page-about .timeline__card {
  border: 1px solid var(--line);
  border-radius: var(--about-radius);
  padding: clamp(18px, 2.8vw, 24px) clamp(18px, 2.6vw, 26px);
  background: var(--panel);
}

.page-about .timeline__item:nth-child(2) .timeline__card { background: #14121E; }
.page-about .timeline__item:nth-child(3) .timeline__card { background: #161327; }
.page-about .timeline__item:nth-child(4) .timeline__card { background: #18142E; }
.page-about .timeline__item:nth-child(5) .timeline__card { background: var(--violet-wash); }

.page-about .timeline__stage {
  margin: 0 0 8px;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--violet);
}

.page-about .timeline__card h3 {
  margin: 0 0 10px;
  font-size: clamp(17px, 2.4vw, 21px);
  line-height: 1.35;
}

.page-about .timeline__card p:last-child {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

@media (min-width: 780px) {
  .page-about .timeline__item {
    grid-template-columns: 168px minmax(0, 1fr);
    gap: 30px;
  }

  .page-about .timeline__item::before {
    content: "";
    position: absolute;
    left: 167px;
    top: 4px;
    bottom: -22px;
    width: 1px;
    background: var(--line);
  }

  .page-about .timeline__item:last-child::before {
    bottom: 0;
    background: linear-gradient(180deg, var(--line), transparent);
  }

  .page-about .timeline__mark {
    align-items: flex-start;
    padding-top: 6px;
  }
}

/* ---------- 03 团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: clamp(22px, 4vw, 34px);
}

@media (min-width: 900px) {
  .page-about .about-team {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, .88fr);
    align-items: start;
  }
}

.page-about .about-team__body > p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--text);
}

.page-about .team-bar {
  display: flex;
  height: 48px;
  margin: 24px 0 18px;
  border: 1px solid var(--line);
  border-radius: var(--about-radius);
  overflow: hidden;
}

.page-about .team-bar__seg {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 0;
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--ink);
  transition: filter .2s var(--ease), letter-spacing .2s var(--ease);
  cursor: default;
}

.page-about .team-bar__seg--edit { flex: 27 1 0; background: var(--violet); color: #fff; }
.page-about .team-bar__seg--data { flex: 21 1 0; background: var(--cyan); }
.page-about .team-bar__seg--tech { flex: 20 1 0; background: var(--orange); }

.page-about .team-bar__seg:hover {
  filter: brightness(1.22);
  letter-spacing: .1em;
}

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

.page-about .team-legend li {
  display: grid;
  grid-template-columns: 10px minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px dashed rgba(35, 36, 58, .9);
  font-size: 15px;
}

.page-about .team-legend li:last-child {
  border-bottom: 0;
}

.page-about .team-legend__dot {
  width: 10px;
  height: 10px;
}

.page-about .team-legend__dot--edit { background: var(--violet); }
.page-about .team-legend__dot--data { background: var(--cyan); }
.page-about .team-legend__dot--tech { background: var(--orange); }

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

.page-about .team-legend__num {
  color: var(--muted);
  font-size: 13px;
}

.page-about .about-team__extra {
  margin: 20px 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
}

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

/* ---------- 04 流程 ---------- */
.page-about .about-flow__figure {
  margin: 0 0 clamp(22px, 4vw, 34px);
}

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

@media (min-width: 820px) {
  .page-about .flow {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }
  .page-about .flow__step { grid-column: span 3; }
  .page-about .flow__step--wide { grid-column: span 3; }
  .page-about .flow__step:nth-child(3) { grid-column: span 2; }
  .page-about .flow__step:nth-child(4) { grid-column: span 4; }
}

.page-about .flow__step {
  position: relative;
  padding: 20px 20px 22px;
  border: 1px solid var(--line);
  border-top: 2px solid var(--violet);
  border-radius: var(--about-radius);
  background: var(--panel-deep);
}

.page-about .flow__step--wide {
  background: var(--panel);
}

.page-about .flow__idx {
  display: inline-block;
  margin-bottom: 10px;
  font-size: 11.5px;
  letter-spacing: .16em;
  color: var(--cyan);
}

.page-about .flow__step h3 {
  margin: 0 0 8px;
  font-size: 17px;
  line-height: 1.4;
}

.page-about .flow__step p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--muted);
}

/* ---------- 05 合作生态 ---------- */
.page-about .about-coop {
  display: grid;
  gap: clamp(22px, 4vw, 34px);
}

@media (min-width: 900px) {
  .page-about .about-coop {
    grid-template-columns: minmax(0, 320px) minmax(0, 1fr);
    align-items: start;
  }
}

.page-about .about-coop__chart {
  padding: 24px 20px;
  border: 1px solid var(--line);
  border-radius: var(--about-radius);
  background: var(--panel-deep);
}

.page-about .donut {
  display: block;
  width: min(240px, 100%);
  margin: 0 auto;
  overflow: visible;
}

.page-about .donut__ring {
  fill: none;
  stroke: var(--line);
  stroke-width: 18;
}

.page-about .donut__arc {
  fill: none;
  stroke-width: 18;
  transform: rotate(-90deg);
  transform-origin: 100px 100px;
}

.page-about .donut__arc--club {
  stroke: var(--violet);
  stroke-dasharray: 293.215 146.608;
}

.page-about .donut__arc--org {
  stroke: var(--cyan);
  stroke-dasharray: 146.608 293.215;
  stroke-dashoffset: -293.215;
}

.page-about .donut__center {
  fill: var(--text);
  font-family: var(--mono);
  font-size: 26px;
  text-anchor: middle;
}

.page-about .donut__center-sub {
  fill: var(--muted);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .1em;
  text-anchor: middle;
}

.page-about .donut-legend {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
  font-size: 14px;
  color: var(--muted);
}

.page-about .donut-legend li {
  display: flex;
  align-items: center;
  gap: 10px;
}

.page-about .donut-legend b {
  margin-left: auto;
  color: var(--text);
  font-size: 15px;
}

.page-about .donut-legend__dot {
  width: 10px;
  height: 10px;
  flex: none;
}

.page-about .donut-legend__dot--club { background: var(--violet); }
.page-about .donut-legend__dot--org { background: var(--cyan); }

.page-about .about-coop__body > p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--text);
}

.page-about .about-coop__body h3 {
  margin: 26px 0 0;
  font-size: 18px;
  line-height: 1.4;
}

.page-about .about-coop__cta {
  margin-top: 24px;
}

.page-about .about-coop__figure {
  margin: clamp(24px, 4vw, 36px) 0 0;
}

/* ---------- 06 认可 ---------- */
.page-about .awards {
  display: grid;
  gap: 18px;
}

@media (min-width: 860px) {
  .page-about .awards {
    grid-template-columns: minmax(0, .9fr) minmax(0, .9fr) minmax(0, 1.2fr);
  }
}

.page-about .awards__item {
  padding: 24px 22px;
  border: 1px solid var(--line);
  border-radius: var(--about-radius);
  background: linear-gradient(180deg, rgba(124, 77, 255, .10), transparent 60%), var(--panel);
}

.page-about .awards__num {
  margin: 0 0 12px;
  font-size: clamp(30px, 5vw, 42px);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
}

.page-about .awards__item h3 {
  margin: 0 0 10px;
  font-size: 16px;
  line-height: 1.42;
}

.page-about .awards__item p:last-child {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--muted);
}

/* ---------- 07 团队所在地 ---------- */
.page-about .about-studio {
  display: grid;
  gap: clamp(24px, 4vw, 40px);
  padding-top: clamp(28px, 5vw, 44px);
  border-top: 1px solid var(--line);
}

@media (min-width: 900px) {
  .page-about .about-studio {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
    align-items: start;
  }
}

.page-about .about-studio__body h2 {
  margin: 12px 0 16px;
  font-size: clamp(22px, 4.4vw, 32px);
  line-height: 1.25;
  transform: skewX(-2deg);
  transform-origin: left bottom;
}

.page-about .about-studio__body p {
  margin: 0 0 14px;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--text);
}

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

.page-about .about-studio__facts {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--about-radius);
}

.page-about .about-fact--sm {
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.page-about .about-fact--sm dt {
  text-transform: none;
  font-family: var(--sans);
  font-size: 14px;
  letter-spacing: 0;
  color: var(--muted);
}

.page-about .about-fact--sm dd {
  font-family: var(--mono);
  font-size: 14px;
  color: var(--text);
}

/* ---------- 图片容器微调 ---------- */
.page-about .media-frame {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--about-radius);
  background: var(--panel-deep);
}

.page-about .media-frame img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 14 / 9;
}

.page-about .media-frame--wide img {
  aspect-ratio: 16 / 7;
}