.page-about {
  --about-rail: 176px;
  --about-gap: clamp(32px, 5vw, 76px);
  background: var(--rb-black);
  color: var(--rb-ink);
}

.page-about [id] {
  scroll-margin-top: calc(var(--rb-header-h) + 24px);
}

/* ===== 首屏 ===== */
.page-about .about-hero {
  position: relative;
  padding: calc(var(--rb-header-h) + clamp(40px, 8vw, 92px)) 0 clamp(36px, 6vw, 72px);
  background:
    radial-gradient(120% 92% at 88% 0%, rgba(210, 32, 47, 0.30) 0%, rgba(210, 32, 47, 0) 58%),
    radial-gradient(92% 82% at 4% 100%, rgba(46, 125, 255, 0.20) 0%, rgba(46, 125, 255, 0) 62%),
    linear-gradient(180deg, #0A0B0D 0%, #12161E 100%);
  border-bottom: 1px solid var(--rb-line);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(112deg, rgba(243, 245, 247, 0.045) 0 1px, transparent 1px 15px);
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
}

.page-about .about-hero__rail {
  display: flex;
  align-items: center;
  gap: 14px;
}

.page-about .about-hero__rail::after {
  content: "";
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--rb-yellow), rgba(255, 197, 61, 0));
}

.page-about .about-hero__vert {
  font-family: var(--rb-font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.3em;
  color: var(--rb-yellow);
  white-space: nowrap;
}

.page-about .about-hero__main .rb-breadcrumb {
  margin-bottom: 18px;
}

.page-about .about-hero__title {
  margin: 12px 0 0;
  font-size: clamp(2.15rem, 7.2vw, 5rem);
  line-height: 1.04;
  letter-spacing: -0.02em;
  font-weight: 900;
  color: var(--rb-white);
}

.page-about .about-hero__lead {
  margin: 20px 0 0;
  max-width: 44em;
  font-size: clamp(0.9375rem, 1.6vw, 1.0625rem);
  line-height: 1.85;
  color: var(--rb-ink-soft);
}

.page-about .about-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 12px clamp(18px, 4vw, 46px);
  margin: clamp(26px, 4vw, 42px) 0 0;
  padding: 20px 0 0;
  border-top: 1px solid var(--rb-line);
  list-style: none;
}

.page-about .about-hero__stats li {
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.page-about .about-hero__stats .rb-num {
  font-size: clamp(1.375rem, 3vw, 1.75rem);
  font-weight: 700;
  color: var(--rb-white);
}

.page-about .about-hero__stats em {
  font-style: normal;
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
  color: var(--rb-ink-dim);
}

/* ===== 正文骨架 ===== */
.page-about .about-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: 34px;
  padding-top: clamp(40px, 7vw, 84px);
  padding-bottom: clamp(56px, 8vw, 120px);
}

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

.page-about .about-rail__inner {
  display: flex;
  gap: 20px;
  align-items: flex-start;
}

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

.page-about .about-rail__nav {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 8px;
  width: 100%;
  min-width: 0;
  scrollbar-width: thin;
}

.page-about .about-rail__nav a {
  flex: none;
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 7px 11px;
  border: 1px solid var(--rb-line);
  background: var(--rb-panel);
  color: var(--rb-ink-soft);
  font-size: 0.8125rem;
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--rb-dur) var(--rb-ease), background-color var(--rb-dur) var(--rb-ease), border-color var(--rb-dur) var(--rb-ease);
}

.page-about .about-rail__nav a:hover,
.page-about .about-rail__nav a:focus-visible {
  color: var(--rb-white);
  border-color: var(--rb-line-strong);
  background: var(--rb-indigo);
}

.page-about .about-rail__no {
  font-size: 0.6875rem;
  color: var(--rb-red);
  letter-spacing: 0.1em;
}

.page-about .about-rail__nav a:hover .about-rail__no,
.page-about .about-rail__nav a:focus-visible .about-rail__no {
  color: var(--rb-yellow);
}

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

/* ===== 区块 ===== */
.page-about .about-block {
  position: relative;
}

.page-about .about-block + .about-block {
  margin-top: clamp(52px, 7vw, 100px);
  padding-top: clamp(28px, 4vw, 52px);
}

.page-about .about-block + .about-block::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: min(100%, 340px);
  height: 3px;
  background: linear-gradient(90deg, var(--rb-red) 0 32%, var(--rb-yellow) 32% 44%, rgba(243, 245, 247, 0.12) 44% 100%);
}

.page-about .about-block__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 20px;
}

.page-about .about-block__no {
  flex: none;
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  color: var(--rb-red);
  border: 1px solid rgba(210, 32, 47, 0.55);
  padding: 3px 8px;
  line-height: 1.4;
}

.page-about .about-block__title {
  margin: 0;
  font-size: clamp(1.4375rem, 3.6vw, 2.25rem);
  line-height: 1.22;
  letter-spacing: -0.01em;
  font-weight: 900;
  color: var(--rb-white);
}

.page-about .about-text {
  margin: 0;
  font-size: 1.0625rem;
  line-height: 1.85;
  color: var(--rb-ink-soft);
  max-width: 40em;
}

.page-about .about-text + .about-text {
  margin-top: 1.1em;
}

.page-about .about-link {
  color: var(--rb-blue);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  color: var(--rb-yellow);
}

/* ===== 站点范围三卡 ===== */
.page-about .about-scope {
  list-style: none;
  margin: 32px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .about-scope > li {
  position: relative;
  background: var(--rb-panel);
  border-left: 3px solid var(--rb-red);
  padding: 24px 22px;
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 0 100%);
}

.page-about .about-scope > li:nth-child(2) {
  border-left-color: var(--rb-blue);
}

.page-about .about-scope > li:nth-child(3) {
  border-left-color: var(--rb-yellow);
}

.page-about .about-scope__no {
  display: block;
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  color: var(--rb-ink-dim);
}

.page-about .about-scope h3 {
  margin: 10px 0 8px;
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--rb-white);
}

.page-about .about-scope p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--rb-ink-soft);
}

/* ===== 图 ===== */
.page-about .about-figure {
  position: relative;
  margin: 0;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
  background: var(--rb-panel);
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 14 / 9;
  object-fit: cover;
  filter: saturate(0.92) contrast(1.06);
}

.page-about .about-figure--wide {
  margin: clamp(24px, 4vw, 40px) 0 clamp(24px, 4vw, 36px);
}

.page-about .about-figure--band {
  margin: clamp(26px, 4vw, 42px) 0 clamp(20px, 3vw, 32px);
}

.page-about .about-figure--band img {
  aspect-ratio: 12 / 7;
}

.page-about .about-figure::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: repeating-linear-gradient(0deg, rgba(10, 11, 13, 0.16) 0 1px, transparent 1px 4px);
}

/* ===== 赛季刻度 ===== */
.page-about .about-seasonscale {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 4px 2px 12px;
  margin-bottom: 26px;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-seasonscale::-webkit-scrollbar {
  height: 4px;
}

.page-about .about-seasonscale::-webkit-scrollbar-thumb {
  background: rgba(210, 32, 47, 0.5);
}

.page-about .about-seasonscale a {
  flex: none;
  scroll-snap-align: start;
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 9px 13px;
  border: 1px solid var(--rb-line);
  background: var(--rb-panel);
  color: var(--rb-ink-soft);
  font-size: 0.8125rem;
  text-decoration: none;
  white-space: nowrap;
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 0 100%);
  transition: color var(--rb-dur) var(--rb-ease), background-color var(--rb-dur) var(--rb-ease);
}

.page-about .about-seasonscale a:hover,
.page-about .about-seasonscale a:focus-visible {
  color: var(--rb-white);
  background: var(--rb-indigo);
}

.page-about .about-seasonscale .rb-num {
  color: var(--rb-yellow);
  font-weight: 700;
  letter-spacing: 0.06em;
}

/* ===== 赛季时间线 ===== */
.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 27px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, var(--rb-red) 0%, rgba(210, 32, 47, 0.16) 72%, rgba(210, 32, 47, 0) 100%);
}

.page-about .about-timeline__item {
  position: relative;
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 16px;
  padding-bottom: 24px;
}

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

.page-about .about-timeline__no {
  position: relative;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 34px;
  background: var(--rb-black);
  border: 1px solid var(--rb-line-strong);
  color: var(--rb-red);
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  align-self: start;
}

.page-about .about-timeline__body h3 {
  margin: 4px 0 8px;
  font-size: 1.0625rem;
  font-weight: 700;
  line-height: 1.5;
  color: var(--rb-white);
}

.page-about .about-timeline__body p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--rb-ink-soft);
  max-width: 40em;
}

.page-about .about-timeline__flag {
  display: inline-block;
  margin-left: 9px;
  padding: 2px 8px;
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--rb-black);
  background: var(--rb-yellow);
  vertical-align: 2px;
}

/* ===== 分栏与团队 ===== */
.page-about .about-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 3vw, 40px);
}

.page-about .about-crew {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--rb-line);
  border: 1px solid var(--rb-line);
  margin: 28px 0 0;
}

.page-about .about-crew > div {
  background: var(--rb-panel);
  padding: 16px 14px;
}

.page-about .about-crew dt {
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
  color: var(--rb-ink-dim);
}

.page-about .about-crew dd {
  margin: 7px 0 0;
  font-family: var(--rb-font-mono);
  font-size: 1.75rem;
  font-weight: 700;
  line-height: 1;
  color: var(--rb-white);
}

.page-about .about-crew > div:last-child {
  background: linear-gradient(150deg, rgba(11, 59, 58, 0.95), var(--rb-panel) 70%);
}

.page-about .about-crew > div:last-child dd {
  color: var(--rb-yellow);
}

.page-about .about-checks {
  margin-top: 30px;
}

/* ===== 归档分类 ===== */
.page-about .about-cats {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .about-cats > li {
  position: relative;
  background: linear-gradient(150deg, rgba(11, 59, 58, 0.9) 0%, rgba(18, 22, 30, 1) 66%);
  border-left: 3px solid var(--rb-blue);
  padding: 20px 20px 20px 22px;
}

.page-about .about-cats > li:nth-child(even) {
  border-left-color: var(--rb-yellow);
}

.page-about .about-cats__no {
  display: block;
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  color: var(--rb-ink-dim);
}

.page-about .about-cats h3 {
  margin: 9px 0 7px;
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--rb-white);
}

.page-about .about-cats p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.78;
  color: var(--rb-ink-soft);
}

/* ===== 原则 ===== */
.page-about .about-rules {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--rb-line);
  border-top: 1px solid var(--rb-line);
  border-bottom: 1px solid var(--rb-line);
}

.page-about .about-rules > li {
  background: var(--rb-black);
  padding: 22px 20px;
}

.page-about .about-rules__no {
  display: block;
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  color: var(--rb-red);
}

.page-about .about-rules h3 {
  margin: 10px 0 8px;
  font-size: 1.0625rem;
  font-weight: 700;
  line-height: 1.5;
  color: var(--rb-white);
}

.page-about .about-rules p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--rb-ink-soft);
  max-width: 42em;
}

.page-about .about-order {
  margin-top: clamp(28px, 4vw, 44px);
  padding: clamp(20px, 3vw, 30px);
  background: var(--rb-indigo);
  clip-path: polygon(0 0, calc(100% - 24px) 0, 100% 24px, 100% 100%, 0 100%);
}

.page-about .about-order h3 {
  margin: 0 0 16px;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--rb-yellow);
}

.page-about .about-order ol {
  margin: 0;
  padding-left: 0;
  list-style: none;
  counter-reset: about-order;
}

.page-about .about-order li {
  position: relative;
  counter-increment: about-order;
  padding-left: 38px;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--rb-ink-soft);
}

.page-about .about-order li + li {
  margin-top: 10px;
}

.page-about .about-order li::before {
  content: counter(about-order, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0;
  font-family: var(--rb-font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.06em;
  color: var(--rb-blue);
}

.page-about .about-order__note {
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: 1px solid rgba(243, 245, 247, 0.14);
  font-size: 0.8125rem;
  line-height: 1.75;
  color: var(--rb-ink-dim);
  max-width: 42em;
}

/* ===== 继续查阅 ===== */
.page-about .about-next {
  margin-top: clamp(48px, 7vw, 92px);
  padding-top: clamp(28px, 4vw, 44px);
  border-top: 1px solid var(--rb-line);
}

.page-about .about-next h2 {
  margin: 0 0 22px;
  font-size: clamp(1.25rem, 2.8vw, 1.625rem);
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--rb-white);
}

.page-about .about-next ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--rb-line);
  border: 1px solid var(--rb-line);
}

.page-about .about-next li {
  background: var(--rb-panel);
}

.page-about .about-next a {
  display: block;
  padding: 18px 20px;
  text-decoration: none;
  color: var(--rb-ink);
  transition: background-color var(--rb-dur) var(--rb-ease), padding-left var(--rb-dur) var(--rb-ease);
}

.page-about .about-next a:hover,
.page-about .about-next a:focus-visible {
  background: var(--rb-indigo);
  padding-left: 28px;
}

.page-about .about-next span {
  display: block;
  font-size: 1rem;
  font-weight: 700;
  color: var(--rb-white);
}

.page-about .about-next em {
  display: block;
  margin-top: 6px;
  font-style: normal;
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--rb-ink-dim);
}

/* ===== 断点 ===== */
@media (min-width: 620px) {
  .page-about .about-crew {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 700px) {
  .page-about .about-scope {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

  .page-about .about-scope > li:nth-child(2) {
    margin-top: 30px;
  }

  .page-about .about-scope > li:nth-child(3) {
    margin-top: 58px;
  }

  .page-about .about-cats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
  }

  .page-about .about-timeline__item {
    grid-template-columns: 68px minmax(0, 1fr);
    gap: 24px;
  }

  .page-about .about-timeline::before {
    left: 33px;
  }

  .page-about .about-timeline__no {
    width: 68px;
  }

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

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

  .page-about .about-split__aside {
    margin-top: 34px;
  }

  .page-about .about-rules > li {
    padding: 24px 24px 24px 26px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 3fr) minmax(0, 9fr);
    gap: var(--about-gap);
    align-items: start;
  }

  .page-about .about-hero__rail {
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding-top: 34px;
  }

  .page-about .about-hero__rail::after {
    display: none;
  }

  .page-about .about-hero__vert {
    writing-mode: vertical-rl;
    text-orientation: mixed;
    letter-spacing: 0.34em;
    max-height: 280px;
    white-space: normal;
  }

  .page-about .about-body {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: var(--about-gap);
  }

  .page-about .about-rail {
    position: sticky;
    top: calc(var(--rb-header-h) + 30px);
    align-self: start;
    display: block;
  }

  .page-about .about-rail__inner {
    display: flex;
    flex-direction: row;
    align-items: flex-start;
    gap: 20px;
  }

  .page-about .about-rail__vert {
    display: block;
    writing-mode: vertical-rl;
    text-orientation: mixed;
    font-family: var(--rb-font-mono);
    font-size: 0.6875rem;
    letter-spacing: 0.3em;
    color: rgba(140, 148, 158, 0.75);
    max-height: 220px;
    white-space: nowrap;
  }

  .page-about .about-rail__nav {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
    border-left: 1px solid var(--rb-line);
  }

  .page-about .about-rail__nav a {
    border: 0;
    border-left: 2px solid transparent;
    background: transparent;
    padding: 9px 0 9px 12px;
    white-space: normal;
    line-height: 1.45;
  }

  .page-about .about-rail__nav a:hover,
  .page-about .about-rail__nav a:focus-visible {
    background: transparent;
    border-left-color: var(--rb-red);
    color: var(--rb-white);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-rail__nav a,
  .page-about .about-seasonscale a,
  .page-about .about-next a {
    transition-duration: 120ms;
  }
}
</final>