.page-about {
  --about-rail: 34px;
  --about-dot: 11px;
  display: block;
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumb {
  padding-top: clamp(18px, 3vw, 30px);
}

.page-about .breadcrumb__link:hover {
  color: var(--orange-soft);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: clamp(18px, 3vw, 34px) 0 clamp(42px, 6vw, 78px);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(22px, 3.5vw, 48px);
  align-items: end;
}

.page-about .about-hero__media {
  position: relative;
  margin: 0;
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--ink-800);
  aspect-ratio: 16 / 11;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
}

.page-about .about-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(150deg, rgba(255, 107, 26, .22), transparent 42%, rgba(47, 230, 198, .14));
  pointer-events: none;
}

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

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

.page-about .about-hero__title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(30px, 5.4vw, 52px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--paper);
  max-width: 15em;
}

.page-about .about-hero__lede {
  margin: 18px 0 0;
  max-width: 34em;
  color: var(--mist);
  font-size: 16px;
  line-height: 1.75;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 18px;
  margin-top: clamp(24px, 3vw, 34px);
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.page-about .about-hero__stats .stat {
  display: flex;
  flex-direction: column;
  gap: 5px;
  min-width: 0;
}

.page-about .about-hero__stats .stat__value {
  font-family: var(--font-mono);
  font-size: clamp(20px, 2.4vw, 24px);
  line-height: 1.1;
  letter-spacing: 0.02em;
  font-variant-numeric: tabular-nums;
  color: var(--orange);
}

.page-about .about-hero__stats .stat__label {
  font-size: 13px;
  line-height: 1.5;
  color: var(--mist);
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }

  .page-about .about-hero__media {
    aspect-ratio: 4 / 5;
  }
}

@media (min-width: 640px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 时间轴 ---------- */
.page-about .about-track {
  position: relative;
  padding: clamp(36px, 6vw, 82px) 0;
}

.page-about .about-track::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(120% 70% at 12% 0%, rgba(255, 107, 26, .10), transparent 60%),
    radial-gradient(90% 60% at 88% 100%, rgba(47, 230, 198, .08), transparent 65%);
  pointer-events: none;
}

.page-about .about-track > .shell {
  position: relative;
}

.page-about .about-track__head {
  max-width: 44em;
}

.page-about .about-timeline {
  position: relative;
  list-style: none;
  margin: clamp(28px, 4vw, 46px) 0 0;
  padding: 0 0 0 var(--about-rail);
  display: grid;
  gap: clamp(16px, 2.4vw, 24px);
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 12px;
  bottom: 12px;
  width: 1px;
  background: linear-gradient(180deg, var(--orange), rgba(47, 230, 198, .45) 58%, rgba(157, 180, 201, .12));
}

.page-about .about-stage {
  position: relative;
}

.page-about .about-stage::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 26px;
  width: var(--about-dot);
  height: var(--about-dot);
  border-radius: 50%;
  background: var(--ink-900);
  border: 2px solid var(--orange);
  transition: transform var(--dur) ease, box-shadow var(--dur) ease, background var(--dur) ease;
}

.page-about .about-stage:hover::before,
.page-about .about-stage:focus-within::before {
  transform: scale(1.4);
  background: var(--orange);
  box-shadow: 0 0 0 6px rgba(255, 107, 26, .16);
}

.page-about .about-file {
  position: relative;
  margin: 0;
  padding: clamp(18px, 2.4vw, 26px) clamp(18px, 2.6vw, 30px);
  background: var(--ink-850);
  border-radius: var(--radius);
  transition: background var(--dur) ease;
}

.page-about .about-file:hover {
  background: var(--ink-800);
}

.page-about .about-file__tag {
  display: inline-block;
  margin: 0 0 10px;
}

.page-about .about-file__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(18px, 2.2vw, 24px);
  line-height: 1.32;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-file__body {
  margin: 0;
  max-width: 54em;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .about-file--paper {
  background: var(--warm);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%);
}

.page-about .about-file--paper .about-file__title {
  color: var(--ink-900);
}

.page-about .about-file--paper .about-file__body {
  color: var(--ink-700);
}

.page-about .about-file--spot {
  box-shadow: inset 0 0 0 1px rgba(255, 107, 26, .28);
}

/* ---------- 内容分类 ---------- */
.page-about .about-scenes {
  padding: clamp(36px, 6vw, 82px) 0;
}

.page-about .about-scenes__head {
  max-width: 46em;
}

.page-about .about-scenes__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: clamp(26px, 4vw, 42px);
}

.page-about .about-cat {
  position: relative;
  overflow: hidden;
  padding: clamp(20px, 2.8vw, 32px);
  background: var(--ink-800);
  border-radius: var(--radius);
  transition: background var(--dur) ease;
}

.page-about .about-cat::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  width: calc(var(--cut) * 1.6);
  height: 2px;
  background: var(--orange);
  transform: rotate(-45deg);
  transform-origin: 100% 100%;
  opacity: .3;
  transition: opacity var(--dur) ease, box-shadow var(--dur) ease;
}

.page-about .about-cat:hover {
  background: var(--ink-850);
}

.page-about .about-cat:hover::after,
.page-about .about-cat:focus-within::after {
  opacity: 1;
  box-shadow: 0 0 12px rgba(255, 107, 26, .6);
}

.page-about .about-cat__tag {
  display: inline-block;
  margin: 0 0 12px;
}

.page-about .about-cat__title {
  margin: 0 0 10px;
  font-family: var(--font-editorial);
  font-weight: 600;
  font-size: clamp(20px, 2.6vw, 27px);
  line-height: 1.4;
  color: var(--paper);
}

.page-about .about-cat__body {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--mist);
}

.page-about .about-cat__list {
  list-style: none;
  margin: 16px 0 0;
  padding: 16px 0 0;
  border-top: 1px solid var(--line-soft);
  display: grid;
  gap: 9px;
}

.page-about .about-cat__list li {
  position: relative;
  padding-left: 17px;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--paper);
}

.page-about .about-cat__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 7px;
  height: 1px;
  background: var(--cyan);
}

@media (min-width: 880px) {
  .page-about .about-scenes__grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: 18px;
  }

  .page-about .about-cat--a { grid-column: span 7; }
  .page-about .about-cat--b { grid-column: span 5; }
  .page-about .about-cat--c { grid-column: span 5; }
  .page-about .about-cat--d { grid-column: span 7; }
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  padding: clamp(36px, 6vw, 82px) 0;
}

.page-about .about-team__inner {
  display: grid;
  gap: clamp(24px, 3.5vw, 46px);
  align-items: center;
}

.page-about .about-team__lead {
  margin: 14px 0 0;
  max-width: 40em;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--mist);
}

.page-about .about-team__points {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-team__points li {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  line-height: 1.72;
  color: var(--mist);
}

.page-about .about-team__points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 8px;
  height: 1px;
  background: var(--cyan);
}

.page-about .about-team__points strong {
  font-weight: 600;
  color: var(--paper);
}

.page-about .about-team__note {
  margin: 20px 0 0;
  padding: 14px 16px;
  border-left: 2px solid var(--amber);
  background: rgba(242, 178, 62, .07);
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--paper);
}

.page-about .about-team__media {
  margin: 0;
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--ink-800);
  aspect-ratio: 3 / 2;
}

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

@media (min-width: 900px) {
  .page-about .about-team__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }
}

/* ---------- 赛季阶段报告 ---------- */
.page-about .about-reports {
  padding: clamp(36px, 6vw, 76px) 0;
}

.page-about .about-reports__head {
  max-width: 44em;
}

.page-about .about-phases {
  list-style: none;
  margin: clamp(26px, 4vw, 42px) 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-phase {
  padding: 20px 20px 24px;
  background: var(--ink-850);
  border-top: 2px solid var(--amber);
  border-radius: 0 0 var(--radius) var(--radius);
  transition: background var(--dur) ease;
}

.page-about .about-phase:hover {
  background: var(--ink-800);
}

.page-about .about-phase__no {
  display: block;
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--amber);
}

.page-about .about-phase h3 {
  margin: 12px 0 8px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 20px;
  line-height: 1.3;
  color: var(--paper);
}

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

@media (min-width: 760px) {
  .page-about .about-phases {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
  }
}

/* ---------- 合作生态 ---------- */
.page-about .about-eco {
  padding: clamp(36px, 6vw, 82px) 0;
}

.page-about .about-eco__banner {
  position: relative;
  margin: 0 0 clamp(26px, 4vw, 42px);
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--ink-800);
  aspect-ratio: 16 / 9;
  clip-path: polygon(0 0, 100% 0, 100% 100%, 24px 100%, 0 calc(100% - 24px));
}

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

.page-about .about-eco__head {
  max-width: 46em;
}

.page-about .about-eco__list {
  list-style: none;
  margin: clamp(24px, 3.5vw, 38px) 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .about-eco__item {
  position: relative;
  padding: clamp(20px, 2.6vw, 30px);
  background: var(--ink-800);
  border-radius: var(--radius);
  transition: background var(--dur) ease;
}

.page-about .about-eco__item:hover {
  background: var(--ink-850);
}

.page-about .about-eco__tag {
  display: inline-block;
  margin: 0 0 12px;
}

.page-about .about-eco__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(18px, 2.2vw, 22px);
  line-height: 1.32;
  color: var(--paper);
}

.page-about .about-eco__body {
  margin: 0;
  font-size: 15px;
  line-height: 1.76;
  color: var(--mist);
}

@media (min-width: 800px) {
  .page-about .about-eco__list {
    grid-template-columns: repeat(12, minmax(0, 1fr));
  }

  .page-about .about-eco__item:nth-child(1) { grid-column: span 6; }
  .page-about .about-eco__item:nth-child(2) { grid-column: span 6; margin-top: 28px; }
  .page-about .about-eco__item:nth-child(3) { grid-column: span 12; }
}

@media (min-width: 1180px) {
  .page-about .about-eco__banner {
    aspect-ratio: 21 / 9;
  }
}

/* ---------- 行业认可 ---------- */
.page-about .about-awards {
  padding: clamp(36px, 6vw, 82px) 0;
}

.page-about .about-awards__inner {
  display: grid;
  gap: clamp(22px, 3.5vw, 42px);
}

.page-about .about-awards__text {
  margin: 14px 0 0;
  max-width: 38em;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--mist);
}

.page-about .about-awards__more {
  align-self: start;
  background: var(--ink-850);
  border-left: 2px solid var(--amber);
  border-radius: var(--radius);
}

.page-about .about-awards__more summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 18px 22px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 16px;
  line-height: 1.5;
  color: var(--paper);
}

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

.page-about .about-awards__more summary::before {
  content: "";
  flex: 0 0 auto;
  width: 10px;
  height: 10px;
  margin-top: -4px;
  border-right: 2px solid var(--amber);
  border-bottom: 2px solid var(--amber);
  transform: rotate(-45deg);
  transition: transform var(--dur) ease, margin var(--dur) ease;
}

.page-about .about-awards__more[open] summary::before {
  transform: rotate(45deg);
  margin-top: -6px;
}

.page-about .about-awards__more summary:hover {
  color: var(--orange-soft);
}

.page-about .about-awards__more summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
}

.page-about .about-awards__list {
  list-style: none;
  margin: 0;
  padding: 2px 22px 22px;
  display: grid;
  gap: 10px;
}

.page-about .about-awards__list li {
  position: relative;
  padding-left: 16px;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--mist);
}

.page-about .about-awards__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 1px;
  background: var(--cyan);
}

@media (min-width: 900px) {
  .page-about .about-awards__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }
}

/* ---------- 结尾导流 ---------- */
.page-about .about-next {
  padding: clamp(34px, 5vw, 66px) 0 clamp(48px, 7vw, 92px);
}

.page-about .about-next__inner {
  display: grid;
  gap: 24px;
  padding: clamp(24px, 3.5vw, 42px);
  background:
    linear-gradient(120deg, rgba(255, 107, 26, .14), rgba(47, 230, 198, .08) 62%, transparent);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}

.page-about .about-next__copy p {
  margin: 12px 0 0;
  max-width: 40em;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--mist);
}

.page-about .about-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.page-about .about-next__actions .btn {
  flex: 0 1 auto;
}

@media (min-width: 860px) {
  .page-about .about-next__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: center;
  }

  .page-about .about-next__actions {
    justify-content: flex-end;
  }
}

/* ---------- 窄屏收尾 ---------- */
@media (max-width: 420px) {
  .page-about .about-timeline {
    --about-rail: 26px;
  }

  .page-about .about-stage::before {
    left: -24px;
  }

  .page-about .about-next__actions .btn {
    width: 100%;
    text-align: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-stage::before,
  .page-about .about-cat::after,
  .page-about .about-cat,
  .page-about .about-file,
  .page-about .about-phase,
  .page-about .about-eco__item,
  .page-about .about-awards__more summary::before {
    transition: none;
  }

  .page-about .about-stage:hover::before,
  .page-about .about-stage:focus-within::before {
    transform: none;
  }
}