.page-about {
  --about-pad: 20px;
  --about-cut: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 18px 100%, 0 calc(100% - 18px));
  max-width: 1240px;
  margin-inline: auto;
  padding-inline: var(--about-pad);
  color: var(--text);
}

@media (min-width: 900px) {
  .page-about {
    --about-pad: 44px;
  }
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  margin: 92px 0 0;
}

.page-about .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-3);
}

.page-about .breadcrumb li + li::before {
  content: "/";
  margin-right: 10px;
  color: var(--line);
}

.page-about .breadcrumb a {
  color: var(--text-2);
  text-decoration: none;
}

.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  color: var(--mint);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  display: grid;
  gap: 32px;
  padding: 26px 0 56px;
}

.page-about .about-hero__text {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.page-about .about-hero__text .label-mono {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--mint);
}

.page-about .about-hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.2rem, 8.6vw, 4.6rem);
  line-height: 0.98;
  letter-spacing: -0.03em;
  color: var(--text);
}

.page-about .about-hero__lead {
  margin: 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-2);
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px 14px;
  margin: 0;
  padding: 22px 0 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-about .about-hero__facts li {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .about-hero__num {
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 700;
  line-height: 1;
  color: var(--yellow);
  font-variant-numeric: tabular-nums;
}

.page-about .about-hero__unit {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--text-3);
}

.page-about .about-hero__media {
  margin: 0;
  clip-path: var(--about-cut);
  background: var(--ink-800);
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 1fr);
    align-items: center;
    gap: 52px;
    padding: 36px 0 84px;
  }

  .page-about .about-hero__media {
    -webkit-mask-image: linear-gradient(90deg, transparent 0%, #000 26%);
    mask-image: linear-gradient(90deg, transparent 0%, #000 26%);
  }

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

  .page-about .about-hero__num {
    font-size: 34px;
  }
}

/* ---------- 通用章节头 ---------- */
.page-about .section-tag {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 16px;
  padding: 6px 12px;
  border: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-2);
  background: rgba(11, 16, 32, 0.6);
}

.page-about .section-tag .tag__num {
  color: var(--mint);
  font-weight: 700;
}

.page-about .about-era h2,
.page-about .about-team h2,
.page-about .about-flow h2,
.page-about .about-partner h2,
.page-about .about-pledge h2 {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.6rem, 4.6vw, 2.6rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--text);
}

/* ---------- 赛季时间轴 ---------- */
.page-about .about-era {
  padding: 40px 0 20px;
}

.page-about .about-era__intro {
  max-width: 70ch;
}

.page-about .about-era__lead {
  margin: 0 0 34px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-2);
}

.page-about .about-era__grid {
  display: grid;
  gap: 0;
}

.page-about .about-era__rail {
  display: flex;
  gap: 8px;
  margin-bottom: 26px;
  padding-bottom: 12px;
  overflow-x: auto;
  border-bottom: 1px solid var(--line);
  scrollbar-width: thin;
}

.page-about .about-era__rail .chapter-index__link {
  flex: none;
  padding: 6px 14px;
  border: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--text-2);
  text-decoration: none;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-about .about-era__rail .chapter-index__link:hover,
.page-about .about-era__rail .chapter-index__link[aria-current="true"] {
  color: var(--ink-900);
  background: var(--mint);
  border-color: var(--mint);
}

.page-about .era-node {
  padding: 26px 0 30px;
  border-top: 1px solid var(--line);
  scroll-margin-top: 96px;
}

.page-about .era-node:first-child {
  border-top: 0;
  padding-top: 4px;
}

.page-about .era-node__year {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.22em;
  color: var(--mint);
}

.page-about .era-node h3 {
  margin: 0 0 12px;
  font-family: var(--font-sans);
  font-size: clamp(1.15rem, 3vw, 1.5rem);
  font-weight: 700;
  line-height: 1.3;
  color: var(--text);
}

.page-about .era-node p {
  margin: 0 0 18px;
  max-width: 66ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--text-2);
}

.page-about .era-node__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .era-node__stats li {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  font-size: 13px;
  color: var(--text-3);
  font-family: var(--font-mono);
}

.page-about .era-node__stats b {
  font-size: 19px;
  font-weight: 700;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}

@media (min-width: 900px) {
  .page-about .about-era {
    padding: 64px 0 28px;
  }

  .page-about .about-era__grid {
    grid-template-columns: 108px minmax(0, 1fr);
    gap: 0 36px;
    align-items: start;
  }

  .page-about .about-era__rail {
    flex-direction: column;
    gap: 14px;
    position: sticky;
    top: 104px;
    margin-bottom: 0;
    padding: 4px 18px 4px 0;
    overflow: visible;
    border-bottom: 0;
    border-right: 1px solid var(--line);
  }

  .page-about .about-era__rail .chapter-index__link {
    border: 0;
    padding: 0;
    background: none;
    font-size: 20px;
    letter-spacing: 0.06em;
    color: var(--text-3);
  }

  .page-about .about-era__rail .chapter-index__link:hover,
  .page-about .about-era__rail .chapter-index__link[aria-current="true"] {
    color: var(--mint);
    background: none;
  }

  .page-about .era-node {
    padding: 40px 0 46px;
  }

  .page-about .era-node__year {
    font-size: 14px;
  }
}

/* ---------- 里程碑数据带 ---------- */
.page-about .about-band {
  margin-inline: calc(-1 * var(--about-pad));
  margin-top: 40px;
  margin-bottom: 12px;
  padding: 34px var(--about-pad);
  background: linear-gradient(96deg, rgba(46, 230, 168, 0.12) 0%, rgba(5, 7, 14, 0) 62%),
    linear-gradient(180deg, var(--ink-800), var(--ink-900));
  clip-path: polygon(0 0, 100% 18px, 100% 100%, 0 calc(100% - 18px));
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .about-band__inner {
  display: flex;
  gap: 18px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding-bottom: 6px;
}

.page-about .about-band__item {
  flex: 0 0 74%;
  scroll-snap-align: start;
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 18px;
  border-left: 2px solid var(--orange);
  background: rgba(19, 27, 48, 0.7);
}

.page-about .about-band__num {
  font-family: var(--font-mono);
  font-size: 40px;
  font-weight: 700;
  line-height: 1;
  color: var(--yellow);
  font-variant-numeric: tabular-nums;
}

.page-about .about-band__year {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--mint);
}

.page-about .about-band__text {
  font-size: 13px;
  color: var(--text-3);
}

@media (min-width: 760px) {
  .page-about .about-band {
    margin-top: 56px;
    padding: 44px var(--about-pad);
  }

  .page-about .about-band__inner {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0;
    overflow: visible;
  }

  .page-about .about-band__item {
    flex: none;
    border-left: 1px solid var(--line);
    background: none;
    padding: 4px 24px;
  }

  .page-about .about-band__item:first-child {
    border-left: 2px solid var(--orange);
    padding-left: 18px;
  }
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  padding: 52px 0 10px;
}

.page-about .about-team__top {
  display: grid;
  gap: 26px;
  margin-bottom: 38px;
}

.page-about .about-team__media {
  margin: 0;
  clip-path: var(--about-cut);
  background: var(--ink-800);
}

.page-about .about-team__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .about-team__text p {
  margin: 0 0 14px;
  max-width: 64ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--text-2);
}

.page-about .about-team__roles {
  display: grid;
  gap: 16px;
}

.page-about .role-panel {
  position: relative;
  padding: 22px 20px 24px;
  background: var(--ink-700);
  clip-path: var(--about-cut);
  border-left: 1px solid var(--line);
  transition: transform 0.25s var(--ease), background 0.25s var(--ease);
}

.page-about .role-panel:hover,
.page-about .role-panel:focus-within {
  transform: translateY(-4px);
  background: #17203a;
}

.page-about .role-panel__ring {
  position: relative;
  width: 64px;
  height: 64px;
  margin-bottom: 14px;
}

.page-about .role-panel__ring svg {
  display: block;
  width: 100%;
  height: 100%;
}

.page-about .role-panel__count {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}

.page-about .role-panel h3 {
  margin: 0 0 10px;
  font-family: var(--font-sans);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
}

.page-about .role-panel p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-2);
}

@media (min-width: 700px) {
  .page-about .about-team__roles {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
  }
}

@media (min-width: 900px) {
  .page-about .about-team {
    padding: 72px 0 16px;
  }

  .page-about .about-team__top {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    gap: 44px;
    align-items: center;
  }

  .page-about .about-team__roles {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .role-panel {
    min-height: 250px;
  }
}

/* ---------- 内容节奏 ---------- */
.page-about .about-flow {
  padding: 56px 0 20px;
}

.page-about .about-flow__head {
  max-width: 70ch;
}

.page-about .about-flow__lead {
  margin: 0 0 26px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-2);
}

.page-about .about-flow__track {
  display: block;
  width: 100%;
  height: auto;
  margin: 0 0 22px;
}

.page-about .about-flow__list {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: flow;
}

.page-about .flow-step {
  position: relative;
  padding: 20px 18px 22px 22px;
  background: var(--ink-800);
  border-left: 2px solid var(--mint);
}

.page-about .flow-step:nth-child(2) {
  border-left-color: var(--orange);
}

.page-about .flow-step:nth-child(4) {
  border-left-color: var(--yellow);
}

.page-about .flow-step__time {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--mint);
}

.page-about .flow-step:nth-child(2) .flow-step__time {
  color: var(--orange);
}

.page-about .flow-step:nth-child(4) .flow-step__time {
  color: var(--yellow);
}

.page-about .flow-step h3 {
  margin: 0 0 8px;
  font-family: var(--font-sans);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
}

.page-about .flow-step p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--text-2);
}

@media (min-width: 760px) {
  .page-about .about-flow__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
  }
}

@media (min-width: 1100px) {
  .page-about .about-flow {
    padding: 80px 0 26px;
  }

  .page-about .about-flow__list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0;
    border-top: 1px solid var(--line);
    padding-top: 26px;
  }

  .page-about .flow-step {
    background: none;
    border-left: 0;
    border-right: 1px solid var(--line);
    padding: 0 22px 0 0;
  }

  .page-about .flow-step:last-child {
    border-right: 0;
  }
}

/* ---------- 合作与口碑 ---------- */
.page-about .about-partner {
  display: grid;
  gap: 30px;
  padding: 52px 0 20px;
}

.page-about .about-partner__text {
  max-width: 68ch;
}

.page-about .about-partner__text > p {
  margin: 0 0 24px;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--text-2);
}

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

.page-about .about-partner__list li {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 14px 16px;
  background: var(--ink-700);
  border-left: 2px solid var(--line);
}

.page-about .about-partner__num {
  flex: none;
  min-width: 34px;
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 700;
  line-height: 1;
  color: var(--orange);
  font-variant-numeric: tabular-nums;
}

.page-about .about-partner__label {
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--text-2);
}

.page-about .about-partner__more {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--text-3);
}

.page-about .about-partner__more a {
  color: var(--mint);
  text-decoration: none;
  border-bottom: 1px solid rgba(46, 230, 168, 0.4);
}

.page-about .about-partner__more a:hover {
  border-bottom-color: var(--mint);
}

.page-about .about-partner__media {
  margin: 0;
  clip-path: var(--about-cut);
  background: var(--ink-800);
}

.page-about .about-partner__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
}

.page-about .media-frame__caption {
  display: block;
  padding: 10px 14px 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--text-3);
  background: var(--ink-800);
}

@media (min-width: 900px) {
  .page-about .about-partner {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    gap: 48px;
    align-items: center;
    padding: 76px 0 30px;
  }
}

/* ---------- 三个承诺 ---------- */
.page-about .about-pledge {
  padding: 48px 0 20px;
}

.page-about .about-pledge__head {
  max-width: 60ch;
}

.page-about .about-pledge__grid {
  display: grid;
  gap: 16px;
  margin-top: 30px;
}

.page-about .pledge-item {
  position: relative;
  padding: 26px 20px 26px;
  background: linear-gradient(180deg, rgba(46, 230, 168, 0.08), rgba(5, 7, 14, 0) 70%), var(--ink-800);
  clip-path: var(--about-cut);
  border-top: 1px solid var(--line);
}

.page-about .pledge-item__idx {
  display: block;
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  color: var(--mint);
  opacity: 0.7;
}

.page-about .pledge-item h3 {
  margin: 0 0 12px;
  font-family: var(--font-sans);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
}

.page-about .pledge-item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--text-2);
}

@media (min-width: 860px) {
  .page-about .about-pledge {
    padding: 72px 0 28px;
  }

  .page-about .about-pledge__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }
}

/* ---------- 收尾入口 ---------- */
.page-about .about-next {
  margin-top: 46px;
  padding: 40px 22px 44px;
  background: linear-gradient(122deg, rgba(255, 122, 26, 0.16), rgba(5, 7, 14, 0) 58%), var(--ink-800);
  clip-path: polygon(0 22px, 100% 0, 100% 100%, 0 calc(100% - 22px));
  border-bottom: 1px solid var(--line);
}

.page-about .about-next__inner {
  max-width: 72ch;
}

.page-about .about-next h2 {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.5rem, 4.4vw, 2.3rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--text);
}

.page-about .about-next p {
  margin: 0 0 26px;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--text-2);
}

.page-about .about-next p a {
  color: var(--mint);
  text-decoration: none;
  border-bottom: 1px solid rgba(46, 230, 168, 0.4);
}

.page-about .about-next p a:hover {
  border-bottom-color: var(--mint);
}

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

.page-about .about-next__actions .btn {
  text-decoration: none;
}

@media (min-width: 900px) {
  .page-about .about-next {
    margin-top: 64px;
    padding: 56px 48px 60px;
  }
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .role-panel,
  .page-about .chapter-index__link {
    transition: none;
  }

  .page-about .role-panel:hover,
  .page-about .role-panel:focus-within {
    transform: none;
  }
}