.page-about {
  --about-hair: rgba(138, 147, 163, 0.24);
  --about-hair-strong: rgba(138, 147, 163, 0.48);
  --about-body: #b7c0ce;
  --about-panel: #131c2b;
  background: var(--ink);
  color: var(--paper);
}

.page-about > section {
  padding-top: 54px;
  padding-bottom: 54px;
  border-bottom: 1px solid var(--about-hair);
}

.page-about > section:last-of-type {
  border-bottom: 0;
}

.page-about .breadcrumb {
  padding: 18px 0 4px;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  padding-top: 20px;
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
  align-items: start;
}

.page-about .about-eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--cyan);
  text-transform: uppercase;
}

.page-about .about-hero h1 {
  margin: 16px 0 0;
  font-size: clamp(30px, 6.4vw, 54px);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--paper);
  overflow-wrap: break-word;
}

.page-about .about-hero__lede {
  margin: 20px 0 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--about-body);
  max-width: 46em;
}

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

.page-about .about-hero__media {
  margin: 0;
  border-color: var(--about-hair-strong);
}

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

.page-about .about-stats {
  list-style: none;
  margin: 36px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--about-hair);
  border: 1px solid var(--about-hair);
}

.page-about .about-stat {
  background: var(--ink);
  padding: 18px 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 0;
}

.page-about .about-stat__value {
  font-size: clamp(28px, 7vw, 40px);
  font-weight: 700;
  line-height: 1;
  color: var(--orange);
}

.page-about .about-stat__label {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--gray);
  line-height: 1.5;
}

/* ---------- 起步与规模 ---------- */

.page-about .about-origin__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
  align-items: start;
}

.page-about .about-origin__body {
  margin-top: 22px;
}

.page-about .about-origin__body p {
  margin: 0 0 16px;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--about-body);
}

.page-about .about-origin__panel {
  border-color: var(--about-hair-strong);
  border-left: 3px solid var(--blue);
}

.page-about .about-origin__facts {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
}

.page-about .about-origin__facts li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 13px 0;
  border-bottom: 1px dashed var(--about-hair);
}

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

.page-about .about-origin__k {
  font-size: 13.5px;
  line-height: 1.5;
  color: var(--about-body);
  min-width: 0;
}

.page-about .about-origin__v {
  font-size: 24px;
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
  flex: 0 0 auto;
}

.page-about .about-origin__note {
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--about-hair);
  font-size: 13px;
  line-height: 1.7;
  color: var(--gray);
}

/* ---------- 团队分工 ---------- */

.page-about .about-teams__list {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
}

.page-about .about-team {
  padding: 20px 18px 22px;
  background: var(--about-panel);
  border-left: 3px solid var(--blue);
  transition: border-color var(--t-fast) ease, background var(--t-fast) ease;
}

.page-about .about-team:hover {
  border-left-color: var(--orange);
  background: #16202f;
}

.page-about .about-team__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
}

.page-about .about-team__name {
  margin: 0;
  font-size: 19px;
  font-weight: 800;
  letter-spacing: 0.01em;
  color: var(--paper);
}

.page-about .about-team__count {
  font-size: 13px;
  color: var(--gray);
  white-space: nowrap;
}

.page-about .about-team__count .num {
  font-size: 22px;
  font-weight: 700;
  color: var(--orange);
}

.page-about .about-team__bar {
  margin: 14px 0 14px;
  height: 6px;
  background: rgba(138, 147, 163, 0.18);
  overflow: hidden;
}

.page-about .about-team__bar span {
  display: block;
  width: var(--w, 0%);
  height: 100%;
  background: var(--blue);
  transition: width var(--t-fast) ease;
}

.page-about .about-team:hover .about-team__bar span {
  background: var(--orange);
}

.page-about .about-team__desc {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--about-body);
}

/* ---------- 数据上线流程 ---------- */

.page-about .about-flow__steps {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--about-hair);
  border-top: 1px solid var(--about-hair);
  border-bottom: 1px solid var(--about-hair);
}

.page-about .about-flow__step {
  background: var(--about-panel);
  padding: 22px 18px 24px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
  min-width: 0;
}

.page-about .about-flow__idx {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--orange);
}

.page-about .about-flow__title {
  margin: 0;
  font-size: 17px;
  font-weight: 800;
  color: var(--paper);
  letter-spacing: 0.01em;
}

.page-about .about-flow__step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--about-body);
  flex: 1 1 auto;
}

/* ---------- 战术整理 ---------- */

.page-about .about-tactics__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
  align-items: start;
}

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

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

.page-about .about-tactics__text .prose p {
  margin: 0 0 16px;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--about-body);
}

.page-about .about-tactics__link {
  display: inline-block;
  margin-top: 6px;
}

/* ---------- 场馆与城市 ---------- */

.page-about .about-venues__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
  align-items: start;
}

.page-about .about-venues__text .prose p {
  margin: 0 0 16px;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--about-body);
}

.page-about .about-venues__more {
  margin-top: 22px;
}

.page-about .about-collapse > div {
  display: none;
}

.page-about .about-collapse[data-open] > div {
  display: block;
}

.page-about .about-venues__list {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--about-hair);
  border: 1px solid var(--about-hair);
}

.page-about .about-venues__list li {
  background: var(--ink);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 11px 13px;
  font-size: 14px;
  color: var(--about-body);
  min-width: 0;
}

.page-about .about-venues__n {
  font-size: 16px;
  font-weight: 700;
  color: var(--cyan);
}

.page-about .about-venues__map {
  border: 1px solid var(--about-hair-strong);
  background:
    linear-gradient(180deg, rgba(46, 123, 255, 0.08), rgba(14, 17, 22, 0) 62%),
    var(--ink);
  padding: 18px;
}

.page-about .about-venues__map svg {
  display: block;
  width: 100%;
  height: auto;
  max-height: 340px;
}

.page-about .about-map__grid line {
  stroke: rgba(138, 147, 163, 0.18);
  stroke-width: 1;
  stroke-dasharray: 3 6;
}

.page-about .about-map__dots circle {
  fill: var(--blue);
  fill-opacity: 0.82;
  stroke: var(--cyan);
  stroke-width: 1.5;
  transition: fill var(--t-fast) ease, fill-opacity var(--t-fast) ease;
  cursor: pointer;
}

.page-about .about-map__dots circle:hover {
  fill: var(--orange);
  fill-opacity: 1;
}

.page-about .about-venues__legend {
  list-style: none;
  margin: 16px 0 0;
  padding: 14px 0 0;
  border-top: 1px dashed var(--about-hair);
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--gray);
}

.page-about .about-venues__legend li {
  display: flex;
  align-items: center;
  gap: 9px;
}

.page-about .about-ven-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--blue);
  border: 1px solid var(--cyan);
}

.page-about .about-ven-dot--lg {
  width: 14px;
  height: 14px;
}

/* ---------- 版本演进 ---------- */

.page-about .about-timeline__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 34px;
  align-items: start;
}

.page-about .about-timeline__list {
  list-style: none;
  margin: 26px 0 0;
  padding: 0 0 0 26px;
  border-left: 1px solid var(--about-hair-strong);
}

.page-about .about-timeline__item {
  position: relative;
  padding: 0 0 30px 4px;
}

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

.page-about .about-timeline__dot {
  position: absolute;
  left: -33px;
  top: 3px;
  width: 13px;
  height: 13px;
  background: var(--ink);
  border: 2px solid var(--blue);
  clip-path: polygon(50% 0, 100% 50%, 50% 100%, 0 50%);
  transition: background var(--t-fast) ease, border-color var(--t-fast) ease;
}

.page-about .about-timeline__item:hover .about-timeline__dot {
  background: var(--orange);
  border-color: var(--orange);
}

.page-about .about-timeline__stage {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--cyan);
  text-transform: uppercase;
}

.page-about .about-timeline__title {
  margin: 8px 0 8px;
  font-size: 19px;
  font-weight: 800;
  line-height: 1.35;
  color: var(--paper);
}

.page-about .about-timeline__desc {
  margin: 0 0 12px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--about-body);
}

.page-about .about-timeline__out {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--mint);
  border: 1px solid rgba(75, 224, 168, 0.4);
  padding: 4px 10px;
}

.page-about .about-timeline__item--now .about-timeline__stage {
  color: var(--orange);
}

.page-about .about-timeline__aside {
  display: grid;
  gap: 20px;
}

.page-about .about-timeline__aside .media-frame {
  margin: 0;
}

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

.page-about .about-timeline__card {
  border-color: var(--about-hair-strong);
  border-top: 3px solid var(--blue);
}

.page-about .about-timeline__card-text {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--about-body);
}

/* ---------- 服务承诺 ---------- */

.page-about .about-promise__panel {
  padding: 30px 22px 34px;
  border: 0;
  border-top: 6px solid var(--orange);
}

.page-about .about-promise__eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: #8a5a2a;
  text-transform: uppercase;
}

.page-about .about-promise__title {
  margin: 10px 0 0;
  font-size: clamp(24px, 5vw, 34px);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--brown);
}

.page-about .about-promise__cols {
  margin-top: 26px;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
}

.page-about .about-promise__col h3 {
  margin: 0 0 8px;
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 0.06em;
  color: var(--brown);
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(42, 33, 24, 0.28);
}

.page-about .about-promise__col p {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: #453829;
}

/* ---------- 继续了解 ---------- */

.page-about .about-next {
  padding-bottom: 70px;
}

.page-about .about-next__title {
  margin: 22px 0 0;
  font-size: clamp(22px, 4.6vw, 30px);
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-next__links {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--about-hair);
  border: 1px solid var(--about-hair);
}

.page-about .about-next__links li {
  background: var(--ink);
  min-width: 0;
}

.page-about .about-next__links a {
  display: block;
  padding: 18px 16px;
  text-decoration: none;
  border-left: 3px solid transparent;
  transition: border-color var(--t-fast) ease, background var(--t-fast) ease;
}

.page-about .about-next__links a:hover {
  border-left-color: var(--orange);
  background: var(--about-panel);
}

.page-about .about-next__k {
  display: block;
  font-size: 16px;
  font-weight: 800;
  color: var(--cyan);
  letter-spacing: 0.04em;
}

.page-about .about-next__links a:hover .about-next__k {
  color: var(--orange);
}

.page-about .about-next__d {
  display: block;
  margin-top: 7px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--gray);
}

/* ---------- 桌面端 ---------- */

@media (min-width: 720px) {
  .page-about > section {
    padding-top: 68px;
    padding-bottom: 68px;
  }

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

  .page-about .about-stat {
    padding: 22px 20px 24px;
  }

  .page-about .about-teams__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
  }

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

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

  .page-about .about-promise__panel {
    padding: 40px 38px 44px;
  }

  .page-about .about-promise__cols {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 32px;
  }

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

@media (min-width: 1000px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    gap: 52px;
  }

  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    gap: 52px;
  }

  .page-about .about-flow__steps {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .page-about .about-tactics__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.5fr);
    gap: 48px;
    align-items: center;
  }

  .page-about .about-tactics__media {
    max-height: 520px;
    overflow: hidden;
  }

  .page-about .about-venues__grid {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
    gap: 52px;
  }

  .page-about .about-timeline__grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    gap: 52px;
  }

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

@media (max-width: 380px) {
  .page-about .about-stats {
    grid-template-columns: minmax(0, 1fr);
  }

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

.page-about {
  --w: 1rem;
}