/* ============================================================
   品牌概况 / page-about
   ============================================================ */

.page-about {
  --about-max: 1180px;
  --about-pad: clamp(16px, 4vw, 32px);
  --about-nodecol: 64px;
  display: block;
  padding-bottom: clamp(56px, 9vw, 104px);
  color: var(--yb-ink);
}

.page-about .about-hero,
.page-about .about-stats,
.page-about .about-origin,
.page-about .about-timeline,
.page-about .about-team,
.page-about .about-map,
.page-about .about-pillars,
.page-about .about-coop {
  box-sizing: border-box;
  width: 100%;
  max-width: var(--about-max);
  margin-inline: auto;
  padding-inline: var(--about-pad);
}

.page-about h2,
.page-about h3 {
  margin: 0;
}

/* ---------------- 面包屑 ---------------- */
.page-about .about-crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  max-width: var(--about-max);
  margin-inline: auto;
  padding: 22px var(--about-pad) 0;
  font-family: var(--yb-font-data);
  font-size: 11px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--yb-mute);
}

.page-about .about-crumbs .yb-crumbs__link {
  color: var(--yb-mute);
  text-decoration: none;
  transition: color .18s var(--yb-ease);
}

.page-about .about-crumbs .yb-crumbs__link:hover,
.page-about .about-crumbs .yb-crumbs__link:focus-visible {
  color: var(--yb-lime);
}

.page-about .about-crumbs .yb-crumbs__item {
  color: var(--yb-paper);
}

/* ---------------- 首屏 ---------------- */
.page-about .about-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 5vw, 44px);
  padding-top: clamp(24px, 5vw, 52px);
}

.page-about .about-hero__text {
  min-width: 0;
}

.page-about .about-hero__title {
  margin: 14px 0 0;
  font-size: clamp(2rem, 7.4vw, 3.4rem);
  line-height: 1.04;
  letter-spacing: -.01em;
  color: var(--yb-paper);
}

.page-about .about-hero__lede {
  max-width: 62ch;
  margin: 20px 0 0;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--yb-ink);
}

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

.page-about .about-hero__figure {
  position: relative;
  margin: 0;
  overflow: hidden;
  background: var(--yb-slate);
  border-radius: 0 var(--yb-r-l) 0 var(--yb-r-l);
  clip-path: polygon(0 8%, 100% 0, 100% 92%, 0 100%);
}

.page-about .about-hero__img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  filter: saturate(.92) contrast(1.06);
}

/* ---------------- 规模数字带 ---------------- */
.page-about .about-stats {
  margin-top: clamp(40px, 6vw, 68px);
}

.page-about .about-stats__list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 1px;
  list-style: none;
  background: var(--yb-wire);
  border: 1px solid var(--yb-wire);
  border-radius: 0 var(--yb-r-l) 0 var(--yb-r-l);
  overflow: hidden;
}

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

.page-about .about-stats__num {
  font-family: var(--yb-font-data);
  font-size: clamp(1.5rem, 5.2vw, 2.1rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--yb-lime);
}

.page-about .about-stats__label {
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--yb-mute);
}

/* ---------------- 起点 ---------------- */
.page-about .about-origin {
  margin-top: clamp(60px, 9vw, 108px);
}

.page-about .about-origin__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 4vw, 32px);
}

.page-about .about-origin__body {
  min-width: 0;
}

.page-about .about-origin__body p {
  margin: 0 0 16px;
  max-width: 68ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--yb-ink);
}

.page-about .about-origin__body p:last-child {
  margin-bottom: 0;
  color: var(--yb-paper);
  font-family: var(--yb-font-editorial);
  font-size: 16px;
}

/* ---------------- 赛季轴 ---------------- */
.page-about .about-timeline {
  margin-top: clamp(60px, 9vw, 108px);
}

.page-about .about-timeline__lede {
  max-width: 60ch;
  margin: 16px 0 0;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--yb-ink);
}

.page-about .about-timeline__list {
  position: relative;
  margin: clamp(32px, 6vw, 56px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-timeline__list::before {
  content: "";
  position: absolute;
  top: 10px;
  bottom: 40px;
  left: calc(var(--about-nodecol) / 2 - 1px);
  width: 2px;
  background: linear-gradient(180deg, var(--yb-wire) 0%, var(--yb-lime) 58%, var(--yb-orange) 100%);
  opacity: .5;
}

.page-about .about-timeline__item {
  position: relative;
  display: grid;
  grid-template-columns: var(--about-nodecol) minmax(0, 1fr);
  gap: 14px;
  padding-bottom: 28px;
}

.page-about .about-timeline__item:nth-child(1) { --k: 0; }
.page-about .about-timeline__item:nth-child(2) { --k: 1; }
.page-about .about-timeline__item:nth-child(3) { --k: 2; }
.page-about .about-timeline__item:nth-child(4) { --k: 3; }
.page-about .about-timeline__item:nth-child(5) { --k: 4; }

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

.page-about .about-timeline__node {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  padding-top: 2px;
  min-width: 0;
}

.page-about .about-timeline__no {
  font-family: var(--yb-font-data);
  font-weight: 700;
  font-size: calc(1.45rem + var(--k, 0) * .14rem);
  line-height: 1;
  letter-spacing: -.04em;
  color: var(--yb-lime);
  transition: transform .22s var(--yb-ease), color .22s var(--yb-ease);
}

.page-about .about-timeline__unit {
  font-size: 10px;
  letter-spacing: .2em;
  color: var(--yb-mute);
}

.page-about .about-timeline__panel {
  min-width: 0;
  padding: 20px 18px 22px;
  background: var(--yb-slate);
  border: 1px solid var(--yb-wire);
  border-radius: 0 var(--yb-r-l) 0 var(--yb-r-l);
  transition: transform .22s var(--yb-ease),
              border-color .22s var(--yb-ease),
              box-shadow .22s var(--yb-ease);
}

.page-about .about-timeline__item:hover .about-timeline__panel,
.page-about .about-timeline__item:focus-within .about-timeline__panel {
  transform: translateY(-2px);
  border-color: var(--yb-lime);
  box-shadow: var(--yb-shadow);
}

.page-about .about-timeline__item:hover .about-timeline__no,
.page-about .about-timeline__item:focus-within .about-timeline__no {
  transform: scale(1.08);
}

.page-about .about-timeline__kicker {
  margin: 0 0 8px;
  font-family: var(--yb-font-data);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--yb-orange);
}

.page-about .about-timeline__panel .yb-h3 {
  color: var(--yb-paper);
}

.page-about .about-timeline__panel p {
  margin: 10px 0 0;
  font-size: 14.8px;
  line-height: 1.82;
  color: var(--yb-ink);
}

.page-about .about-timeline__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
}

/* ---------------- 团队 ---------------- */
.page-about .about-team {
  margin-top: clamp(60px, 9vw, 108px);
}

.page-about .about-team__shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 5vw, 48px);
  margin-top: clamp(26px, 5vw, 44px);
  align-items: center;
}

.page-about .about-team__ring {
  margin: 0;
  min-width: 0;
}

.page-about .about-team__ring svg {
  display: block;
  width: 100%;
  max-width: 280px;
  height: auto;
  margin-inline: auto;
}

.page-about .about-team__track {
  stroke: var(--yb-wire);
  opacity: .55;
}

.page-about .about-team__arc--edit { stroke: var(--yb-lime); }
.page-about .about-team__arc--data { stroke: var(--yb-orange); }

.page-about .about-team__big {
  font-family: var(--yb-font-data);
  font-size: 36px;
  font-weight: 700;
  letter-spacing: -.04em;
  fill: var(--yb-paper);
}

.page-about .about-team__small {
  font-family: var(--yb-font-body);
  font-size: 11px;
  letter-spacing: .22em;
  fill: var(--yb-mute);
}

.page-about .about-team__cap {
  margin-top: 12px;
  text-align: center;
  font-family: var(--yb-font-data);
  font-size: 10.5px;
  letter-spacing: .16em;
  color: var(--yb-mute);
}

.page-about .about-team__switch {
  position: relative;
  min-width: 0;
}

.page-about .about-team__radio {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: 0;
  padding: 0;
  border: 0;
  opacity: 0;
  pointer-events: none;
}

.page-about .about-team__tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .about-team__tab {
  display: inline-block;
  padding: 9px 14px;
  font-family: var(--yb-font-data);
  font-size: 11.5px;
  letter-spacing: .08em;
  color: var(--yb-mute);
  background: var(--yb-deep);
  border: 1px solid var(--yb-wire);
  border-radius: 2px;
  cursor: pointer;
  transition: color .18s var(--yb-ease),
              background-color .18s var(--yb-ease),
              border-color .18s var(--yb-ease);
}

.page-about .about-team__tab:hover {
  color: var(--yb-paper);
  border-color: var(--yb-lime);
}

.page-about #ateam-1:checked ~ .about-team__tabs .about-team__tab:nth-child(1),
.page-about #ateam-2:checked ~ .about-team__tabs .about-team__tab:nth-child(2),
.page-about #ateam-3:checked ~ .about-team__tabs .about-team__tab:nth-child(3) {
  color: var(--yb-charcoal);
  background: var(--yb-lime);
  border-color: var(--yb-lime);
}

.page-about #ateam-1:focus-visible ~ .about-team__tabs .about-team__tab:nth-child(1),
.page-about #ateam-2:focus-visible ~ .about-team__tabs .about-team__tab:nth-child(2),
.page-about #ateam-3:focus-visible ~ .about-team__tabs .about-team__tab:nth-child(3) {
  outline: 2px solid var(--yb-lime);
  outline-offset: 3px;
}

.page-about .about-team__panels {
  margin-top: 20px;
  padding: 20px 20px 22px;
  background: var(--yb-slate);
  border-left: 2px solid var(--yb-lime);
  border-radius: 0 var(--yb-r-s) var(--yb-r-s) 0;
}

.page-about .about-team__panel {
  display: none;
}

.page-about #ateam-1:checked ~ .about-team__panels > .about-team__panel:nth-child(1),
.page-about #ateam-2:checked ~ .about-team__panels > .about-team__panel:nth-child(2),
.page-about #ateam-3:checked ~ .about-team__panels > .about-team__panel:nth-child(3) {
  display: block;
}

.page-about .about-team__panel p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--yb-ink);
}

/* ---------------- 覆盖范围 ---------------- */
.page-about .about-map {
  margin-top: clamp(60px, 9vw, 108px);
}

.page-about .about-map__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 5vw, 44px);
  margin-top: clamp(26px, 5vw, 44px);
  align-items: start;
}

.page-about .about-map__panel {
  min-width: 0;
}

.page-about .about-map__cities {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 1px;
  list-style: none;
  background: var(--yb-wire);
  border: 1px solid var(--yb-wire);
  border-radius: 0 var(--yb-r-l) 0 var(--yb-r-l);
  overflow: hidden;
}

.page-about .about-map__city {
  display: flex;
  flex-direction: column;
  gap: 7px;
  min-width: 0;
  padding: 14px 12px;
  background: var(--yb-deep);
  transition: background-color .2s var(--yb-ease);
}

.page-about .about-map__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--yb-blue);
  box-shadow: 0 0 0 3px rgba(53, 208, 255, .14);
  transition: transform .2s var(--yb-ease), background-color .2s var(--yb-ease);
}

.page-about .about-map__name {
  font-size: 14px;
  line-height: 1.2;
  color: var(--yb-paper);
}

.page-about .about-map__meta {
  font-family: var(--yb-font-data);
  font-size: 10.5px;
  letter-spacing: .06em;
  line-height: 1.4;
  color: var(--yb-mute);
  transition: color .2s var(--yb-ease);
}

.page-about .about-map__note {
  margin: 20px 0 0;
  max-width: 60ch;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--yb-ink);
}

.page-about .about-map__link,
.page-about .about-coop__link {
  color: var(--yb-lime);
  text-decoration: none;
  border-bottom: 1px solid rgba(200, 255, 61, .4);
}

.page-about .about-map__link:hover,
.page-about .about-map__link:focus-visible,
.page-about .about-coop__link:hover,
.page-about .about-coop__link:focus-visible {
  border-bottom-color: var(--yb-lime);
  color: var(--yb-paper);
}

.page-about .about-map__figure {
  margin: 0;
  min-width: 0;
  overflow: hidden;
  background: var(--yb-slate);
  border-radius: var(--yb-r-l) 0 var(--yb-r-l) 0;
  clip-path: polygon(0 0, 100% 0, 100% 100%, 6% 100%);
}

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

/* ---------------- 内容体系 ---------------- */
.page-about .about-pillars {
  margin-top: clamp(60px, 9vw, 108px);
}

.page-about .about-pillars__lede {
  max-width: 62ch;
  margin: 16px 0 0;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--yb-ink);
}

.page-about .about-pillars__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin-top: clamp(28px, 5vw, 46px);
}

.page-about .about-pillars__card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-width: 0;
  padding: 22px 20px 20px;
  background: var(--yb-slate);
  border: 1px solid var(--yb-wire);
  border-radius: var(--yb-r-s) 0 var(--yb-r-s) 0;
  transition: transform .22s var(--yb-ease),
              border-color .22s var(--yb-ease),
              box-shadow .22s var(--yb-ease);
}

.page-about .about-pillars__card:hover,
.page-about .about-pillars__card:focus-within {
  transform: translateY(-2px);
  border-color: var(--yb-lime);
  box-shadow: var(--yb-shadow);
}

.page-about .about-pillars__idx {
  font-family: var(--yb-font-data);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--yb-blue);
}

.page-about .about-pillars__card .yb-h3 {
  color: var(--yb-paper);
}

.page-about .about-pillars__card p {
  margin: 0;
  font-size: 14.8px;
  line-height: 1.82;
  color: var(--yb-ink);
}

.page-about .about-pillars__link {
  margin-top: auto;
  padding-top: 12px;
  align-self: flex-start;
  font-family: var(--yb-font-data);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--yb-lime);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color .18s var(--yb-ease), color .18s var(--yb-ease);
}

.page-about .about-pillars__link:hover,
.page-about .about-pillars__link:focus-visible {
  border-bottom-color: var(--yb-lime);
  color: var(--yb-paper);
}

/* ---------------- 合作 ---------------- */
.page-about .about-coop {
  margin-top: clamp(60px, 9vw, 108px);
}

.page-about .about-coop__shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 5vw, 48px);
  align-items: center;
}

.page-about .about-coop__body {
  min-width: 0;
}

.page-about .about-coop__list {
  margin: clamp(22px, 4vw, 32px) 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--yb-wire);
}

.page-about .about-coop__item {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 14px;
  padding: 22px 0;
  border-bottom: 1px solid var(--yb-wire);
}

.page-about .about-coop__no {
  font-family: var(--yb-font-data);
  font-size: 20px;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -.03em;
  color: var(--yb-orange);
}

.page-about .about-coop__text {
  min-width: 0;
}

.page-about .about-coop__text .yb-h3 {
  color: var(--yb-paper);
}

.page-about .about-coop__text p {
  margin: 10px 0 0;
  font-size: 14.8px;
  line-height: 1.82;
  color: var(--yb-ink);
}

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

.page-about .about-coop__note {
  margin: 20px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--yb-mute);
}

.page-about .about-coop__figure {
  margin: 0;
  min-width: 0;
  overflow: hidden;
  background: var(--yb-slate);
  border-radius: 0 var(--yb-r-l) 0 var(--yb-r-l);
  clip-path: polygon(0 0, 100% 6%, 100% 100%, 0 94%);
}

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

/* ============================================================
   响应式
   ============================================================ */

@media (min-width: 560px) {
  .page-about .about-map__cities {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-about .about-stats__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-pillars__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
  }

  .page-about .about-pillars__card:nth-child(2),
  .page-about .about-pillars__card:nth-child(4) {
    margin-top: 20px;
  }
}

@media (min-width: 900px) {
  .page-about {
    --about-nodecol: 84px;
  }

  .page-about .about-hero {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    align-items: center;
    gap: clamp(32px, 4vw, 56px);
  }

  .page-about .about-hero__figure {
    clip-path: polygon(0 12%, 100% 0, 100% 88%, 0 100%);
  }

  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    gap: 52px;
  }

  .page-about .about-origin__lead {
    position: sticky;
    top: calc(var(--yb-bar-h) + 32px);
  }

  .page-about .about-timeline__list {
    margin-top: 60px;
  }

  .page-about .about-timeline__no {
    font-size: calc(1.9rem + var(--k, 0) * .22rem);
  }

  .page-about .about-timeline__item {
    gap: 24px;
    padding-bottom: 36px;
  }

  .page-about .about-timeline__panel {
    padding: 24px 26px 26px;
    margin-right: calc(var(--k, 0) * 10px);
  }

  .page-about .about-team__shell {
    grid-template-columns: 300px minmax(0, 1fr);
    gap: 56px;
  }

  .page-about .about-team__ring svg {
    max-width: 300px;
  }

  .page-about .about-map__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 48px;
  }

  .page-about .about-coop__shell {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 56px;
  }
}

@media (min-width: 1120px) {
  .page-about .about-stats__list {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .page-about .about-stats__item {
    padding: 24px 16px;
  }
}

/* 悬停能力有限的设备，城市说明保持可见 */
@media (hover: hover) and (pointer: fine) {
  .page-about .about-map__city .about-map__meta {
    opacity: .55;
  }

  .page-about .about-map__city:hover {
    background: var(--yb-slate);
  }

  .page-about .about-map__city:hover .about-map__meta {
    opacity: 1;
    color: var(--yb-lime);
  }

  .page-about .about-map__city:hover .about-map__dot {
    transform: scale(1.5);
    background: var(--yb-lime);
    box-shadow: 0 0 0 4px rgba(200, 255, 61, .18);
  }
}

/* 焦点可见性 */
.page-about a:focus-visible,
.page-about input:focus-visible + .about-team__tabs {
  outline: 2px solid var(--yb-lime);
  outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {
  .page-about * {
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
  }

  .page-about .about-timeline__item:hover .about-timeline__panel,
  .page-about .about-pillars__card:hover {
    transform: none;
  }
}