.page-about {
  --about-rule: rgba(159, 184, 196, .18);
  --about-rule-strong: rgba(159, 184, 196, .32);
  --about-panel: #111614;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding-bottom: clamp(28px, 5vw, 52px);
  background:
    radial-gradient(110% 88% at 84% -18%, rgba(53, 214, 164, .13), transparent 58%),
    radial-gradient(78% 66% at -8% 6%, rgba(255, 75, 31, .12), transparent 60%);
}

.page-about .about-hero__media {
  position: relative;
  height: clamp(190px, 34vw, 320px);
  overflow: hidden;
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(10, 26, 22, .06) 0%, rgba(10, 26, 22, .70) 72%, var(--ink) 100%);
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
  filter: saturate(.82) contrast(1.06) brightness(.86);
}

.page-about .about-hero__stamp {
  position: absolute;
  right: clamp(12px, 3vw, 34px);
  bottom: clamp(12px, 3vw, 24px);
  z-index: 2;
  font-size: .72rem;
  letter-spacing: .1em;
  color: var(--steel);
  background: rgba(10, 26, 22, .62);
  border: 1px solid var(--about-rule);
  border-radius: var(--r-square);
  padding: 5px 10px;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  padding-top: clamp(20px, 3.4vw, 34px);
}

.page-about .about-hero__title {
  margin: 12px 0 0;
  font-size: clamp(2.2rem, 7vw, 4.4rem);
  line-height: .98;
  letter-spacing: .01em;
  max-width: 14ch;
}

.page-about .about-hero__lead {
  margin-top: clamp(16px, 2.6vw, 24px);
  max-width: 66ch;
}

.page-about .about-facts {
  list-style: none;
  margin: clamp(24px, 4vw, 40px) 0 0;
  padding: 1px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--about-rule);
  border: 1px solid var(--about-rule);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .about-facts__item {
  background: var(--ink-2);
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.page-about .about-facts__num {
  font-size: clamp(1.15rem, 3.4vw, 1.5rem);
  font-weight: 700;
  color: var(--chalk);
  letter-spacing: .02em;
}

@media (min-width: 680px) {
  .page-about .about-facts {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* ---------- 正文骨架 ---------- */
.page-about .about-body {
  padding-top: clamp(36px, 6vw, 74px);
  padding-bottom: clamp(48px, 8vw, 96px);
}

.page-about .about-body__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(30px, 5vw, 56px);
}

.page-about .about-rail {
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-about .about-rail__caption {
  margin: 0;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--steel);
}

.page-about .about-rail .dj-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
}

.page-about .about-rail .dj-rail__link {
  display: block;
  padding: 7px 10px 7px 14px;
  font-size: .875rem;
  line-height: 1.5;
  color: var(--steel);
  text-decoration: none;
  border-left: 2px solid var(--about-rule);
  transition: color .18s var(--ease), border-color .18s var(--ease), background-color .18s var(--ease);
}

.page-about .about-rail .dj-rail__link:hover,
.page-about .about-rail .dj-rail__link:focus-visible {
  color: var(--chalk);
  border-left-color: var(--flag);
  background: var(--mist);
  outline: none;
}

.page-about .about-rail .dj-rail__link:focus-visible {
  box-shadow: 0 0 0 2px var(--flag), 0 0 0 4px var(--ink);
}

.page-about .about-rail .dj-rail__link.is-active {
  color: var(--flag);
  border-left-color: var(--flag);
}

/* 赛季刻度尺 */
.page-about .about-scale {
  list-style: none;
  margin: 6px 0 0;
  padding: 0 0 0 15px;
  display: grid;
  gap: 0;
  border-left: 1px solid var(--about-rule-strong);
}

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

.page-about .about-scale__item::before {
  content: "";
  position: absolute;
  left: -19px;
  top: 15px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--ink);
  border: 1px solid var(--steel);
  transition: background-color .2s var(--ease), border-color .2s var(--ease);
}

.page-about .about-scale__item:hover::before {
  background: var(--flag);
  border-color: var(--flag);
}

.page-about .about-scale__link {
  display: grid;
  gap: 2px;
  padding: 7px 0 9px;
  text-decoration: none;
  color: inherit;
}

.page-about .about-scale__link:focus-visible {
  outline: none;
  box-shadow: 0 0 0 2px var(--flag), 0 0 0 4px var(--ink);
  border-radius: var(--r-square);
}

.page-about .about-scale__year {
  font-size: .78rem;
  letter-spacing: .05em;
  color: var(--chalk);
}

.page-about .about-scale__label {
  font-size: .78rem;
  line-height: 1.5;
  color: var(--steel);
}

@media (min-width: 1000px) {
  .page-about .about-body__grid {
    grid-template-columns: 236px minmax(0, 1fr);
    gap: clamp(40px, 5vw, 72px);
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: calc(var(--header-h) + 26px);
    max-height: calc(100vh - var(--header-h) - 52px);
    overflow-y: auto;
    padding-right: 4px;
  }
}

/* ---------- 正文列 ---------- */
.page-about .about-article {
  min-width: 0;
  display: grid;
  gap: clamp(38px, 6vw, 74px);
}

.page-about .about-sec {
  scroll-margin-top: var(--anchor-offset);
}

.page-about .about-sec .dj-h2 {
  margin: 8px 0 0;
}

.page-about .about-sec > .dj-text {
  margin-top: 16px;
  max-width: 66ch;
}

.page-about .about-rule-line {
  margin: 0;
  border: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--about-rule-strong) 0%, rgba(159, 184, 196, .06) 62%, transparent 100%);
}

/* ---------- 术语注脚 ---------- */
.page-about .about-term {
  position: relative;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 14px 18px 14px 24px;
  background: var(--mist);
  border-radius: 0 var(--r-md) var(--r-md) 0;
  overflow: hidden;
}

.page-about .about-term::before {
  content: "";
  position: absolute;
  left: 0;
  top: -6px;
  bottom: -6px;
  width: 4px;
  background: linear-gradient(180deg, var(--flag), var(--flag-2));
  transform: skewX(-12deg);
}

.page-about .about-term__head {
  margin: 0;
  font-size: .82rem;
  letter-spacing: .1em;
  color: var(--chalk);
  font-family: var(--font-mono);
}

.page-about .about-term__body {
  margin: 7px 0 0;
  font-size: .92rem;
  line-height: 1.7;
  color: var(--steel);
  max-width: 62ch;
}

/* ---------- 标注三步 ---------- */
.page-about .about-steps-layout {
  display: grid;
  gap: clamp(22px, 4vw, 32px);
}

.page-about .about-steps-main > .dj-text {
  margin-top: 16px;
  max-width: 66ch;
}

.page-about .about-steps {
  list-style: none;
  margin: clamp(20px, 3vw, 28px) 0 0;
  padding: 1px;
  display: grid;
  gap: 1px;
  background: var(--about-rule);
  border: 1px solid var(--about-rule);
  border-radius: var(--r-lg);
  overflow: hidden;
}

.page-about .about-steps__item {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 12px;
  padding: 18px 20px;
  background: var(--about-panel);
  transition: background-color .2s var(--ease);
}

.page-about .about-steps__item:hover {
  background: #16342B;
}

.page-about .about-steps__num {
  font-size: 1rem;
  letter-spacing: .08em;
  color: var(--flag);
  padding-top: 2px;
}

.page-about .about-steps__body .dj-h3 {
  margin: 0;
}

.page-about .about-steps__body .dj-text {
  margin: 8px 0 0;
}

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

.page-about .about-steps__media .dj-media__frame {
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .about-steps__media .dj-media__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

@media (min-width: 840px) {
  .page-about .about-steps-layout {
    grid-template-columns: minmax(0, 1fr) 244px;
    align-items: start;
  }
}

/* ---------- 复核闭环 ---------- */
.page-about .about-loop {
  margin-top: clamp(22px, 3.4vw, 32px);
  display: grid;
  gap: clamp(18px, 3vw, 28px);
}

.page-about .about-loop__svg {
  width: 100%;
  max-width: 520px;
  height: auto;
  display: block;
}

.page-about .about-loop__edge {
  fill: none;
  stroke: rgba(242, 246, 245, .5);
  stroke-width: 1;
  stroke-dasharray: 320;
  stroke-dashoffset: 0;
}

.page-about .about-loop__node rect {
  fill: rgba(17, 22, 20, .9);
  stroke: rgba(159, 184, 196, .34);
  stroke-width: 1;
}

.page-about .about-loop__node text {
  fill: var(--chalk);
  font-size: 13px;
  letter-spacing: .04em;
  font-family: var(--font-sans);
}

.page-about .about-loop__node:nth-of-type(2) rect {
  stroke: rgba(255, 75, 31, .5);
}

.page-about .about-loop__legend {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  border-radius: var(--r-md);
  overflow: hidden;
  background: var(--about-rule);
}

.page-about .about-loop__item {
  background: var(--about-panel);
  padding: 13px 16px;
  display: grid;
  gap: 6px;
  cursor: default;
  transition: background-color .18s var(--ease);
}

.page-about .about-loop__item:hover,
.page-about .about-loop__item:focus-within,
.page-about .about-loop__item:focus {
  background: #16342B;
  outline: none;
}

.page-about .about-loop__item:focus-visible {
  box-shadow: inset 0 0 0 2px var(--flag);
}

.page-about .about-loop__tag {
  font-size: .9rem;
  color: var(--chalk);
  letter-spacing: .04em;
}

.page-about .about-loop__hint {
  font-size: .85rem;
  line-height: 1.65;
  color: var(--steel);
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition: max-height .24s var(--ease), opacity .2s var(--ease);
}

.page-about .about-loop__item:hover .about-loop__hint,
.page-about .about-loop__item:focus-within .about-loop__hint,
.page-about .about-loop__item:focus .about-loop__hint {
  max-height: 6em;
  opacity: 1;
}

@media (min-width: 760px) {
  .page-about .about-loop {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    align-items: center;
  }
}

.page-about .about-notice {
  margin-top: clamp(20px, 3vw, 28px);
}

/* ---------- 四组联赛矩阵 ---------- */
.page-about .about-groups {
  margin-top: clamp(22px, 3.4vw, 32px);
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-about .about-group {
  position: relative;
  padding: 20px 20px 18px;
  background: linear-gradient(160deg, rgba(22, 52, 43, .86) 0%, rgba(17, 22, 20, .96) 68%);
  border: 1px solid var(--about-rule);
  border-radius: var(--r-lg);
  overflow: hidden;
}

.page-about .about-group::after {
  content: "";
  position: absolute;
  right: -30px;
  top: -30px;
  width: 96px;
  height: 96px;
  background: radial-gradient(circle, rgba(255, 75, 31, .16) 0%, transparent 70%);
  pointer-events: none;
}

.page-about .about-group__code {
  margin: 0;
  font-size: .82rem;
  letter-spacing: .18em;
  color: var(--flag-2);
}

.page-about .about-group .dj-h3 {
  margin: 8px 0 0;
}

.page-about .about-group .dj-text {
  margin: 8px 0 0;
  font-size: .92rem;
}

.page-about .about-group__list {
  list-style: none;
  margin: 14px 0 0;
  padding: 12px 0 0;
  border-top: 1px dashed var(--about-rule-strong);
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.page-about .about-group__list li {
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .06em;
  color: var(--steel);
  padding: 3px 10px;
  border: 1px solid var(--about-rule);
  border-radius: var(--r-pill);
}

@media (min-width: 780px) {
  .page-about .about-groups {
    grid-template-columns: repeat(6, 1fr);
    gap: 14px;
  }

  .page-about .about-group--a {
    grid-column: span 4;
  }

  .page-about .about-group--b {
    grid-column: span 2;
  }

  .page-about .about-group--c {
    grid-column: span 2;
  }

  .page-about .about-group--d {
    grid-column: span 4;
  }
}

.page-about .about-note {
  margin-top: 18px;
  max-width: 62ch;
}

/* ---------- 球员口径 ---------- */
.page-about .about-players {
  margin-top: clamp(22px, 3.4vw, 30px);
  display: grid;
  gap: 1px;
  background: var(--about-rule);
  border-radius: var(--r-lg);
  overflow: hidden;
}

.page-about .about-players__col {
  background: var(--about-panel);
  padding: 20px 20px 22px;
}

.page-about .about-players__col .dj-h3 {
  margin: 0;
}

.page-about .about-players__col .dj-text {
  margin: 10px 0 0;
  font-size: .95rem;
}

@media (min-width: 760px) {
  .page-about .about-players {
    grid-template-columns: 1fr 1fr;
  }
}

/* ---------- 团队 ---------- */
.page-about .about-team__media {
  margin: 0 0 clamp(26px, 4vw, 40px);
}

.page-about .about-team__media .dj-media__frame {
  border-radius: var(--r-lg);
  overflow: hidden;
}

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

.page-about .about-team__grid {
  margin-top: clamp(22px, 3.4vw, 32px);
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--about-rule);
  border: 1px solid var(--about-rule);
  border-radius: var(--r-lg);
  overflow: hidden;
}

.page-about .about-team__cell {
  background: var(--about-panel);
  padding: 20px 20px 22px;
}

.page-about .about-team__num {
  margin: 0;
  font-size: clamp(1.6rem, 5vw, 2.1rem);
  font-weight: 700;
  line-height: 1;
  color: var(--signal);
  letter-spacing: .02em;
}

.page-about .about-team__cell .dj-h3 {
  margin: 10px 0 0;
}

.page-about .about-team__cell .dj-text {
  margin: 8px 0 0;
  font-size: .92rem;
}

@media (min-width: 720px) {
  .page-about .about-team__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1040px) {
  .page-about .about-team__grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* ---------- 里程碑 ---------- */
.page-about .about-mile {
  list-style: none;
  margin: clamp(22px, 3.4vw, 32px) 0 0;
  padding: 0 0 0 22px;
  display: grid;
  gap: clamp(20px, 3vw, 28px);
  border-left: 1px solid var(--about-rule-strong);
}

.page-about .about-mile__item {
  position: relative;
  padding-left: 4px;
}

.page-about .about-mile__item::before {
  content: "";
  position: absolute;
  left: -27px;
  top: 8px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--ink);
  border: 1px solid var(--flag);
  box-shadow: 0 0 0 3px rgba(255, 75, 31, .12);
}

.page-about .about-mile__stamp {
  margin: 0;
  font-size: .82rem;
  letter-spacing: .1em;
  color: var(--flag-2);
}

.page-about .about-mile__body {
  margin-top: 6px;
}

.page-about .about-mile__body .dj-h3 {
  margin: 0;
}

.page-about .about-mile__body .dj-text {
  margin: 8px 0 0;
  max-width: 64ch;
}

/* ---------- 行内链接 ---------- */
.page-about .about-inlinelink {
  margin: clamp(18px, 3vw, 26px) 0 0;
}

.page-about .about-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: .925rem;
  color: var(--chalk);
  text-decoration: none;
  padding-bottom: 2px;
  border-bottom: 1px solid var(--flag);
  transition: color .18s var(--ease), border-color .18s var(--ease);
}

.page-about .about-link::after {
  content: "→";
  font-family: var(--font-mono);
  color: var(--flag);
  transition: transform .18s var(--ease);
}

.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  color: var(--flag);
  outline: none;
}

.page-about .about-link:hover::after,
.page-about .about-link:focus-visible::after {
  transform: translateX(3px);
}

.page-about .about-link:focus-visible {
  box-shadow: 0 0 0 2px var(--flag), 0 0 0 4px var(--ink);
  border-radius: var(--r-square);
}

/* ---------- 响应式与可访问性 ---------- */
@media (max-width: 999px) {
  .page-about .about-rail .dj-rail__list {
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 6px;
  }

  .page-about .about-rail .dj-rail__link {
    border-left-width: 2px;
    border-bottom: 1px solid var(--about-rule);
  }

  .page-about .about-scale {
    border-left: 0;
    padding-left: 0;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 10px;
  }

  .page-about .about-scale__item::before {
    left: 0;
    top: 14px;
  }

  .page-about .about-scale__link {
    padding-left: 16px;
  }
}

.page-about .about-loop__item:focus {
  outline: none;
}

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

  .page-about .about-loop__edge {
    stroke-dashoffset: 0 !important;
  }
}