.page-about {
  padding-bottom: clamp(40px, 6vw, 80px);
}

/* ---------- 面包屑 ---------- */
.page-about .ab-crumbs {
  padding-top: clamp(16px, 2.4vw, 28px);
}

/* ---------- 首屏框景 ---------- */
.page-about .ab-hero {
  padding: clamp(14px, 2.4vw, 26px) 0 clamp(30px, 5vw, 56px);
}

.page-about .ab-hero__box {
  position: relative;
  overflow: hidden;
  padding: clamp(26px, 4.6vw, 58px) clamp(20px, 4vw, 54px) clamp(20px, 3.4vw, 40px);
  border: 1px solid var(--line);
  background:
    radial-gradient(120% 90% at 6% -12%, rgba(164, 92, 255, .22), transparent 56%),
    radial-gradient(90% 80% at 102% 112%, rgba(47, 224, 255, .14), transparent 60%),
    var(--bg-panel);
}

.page-about .ab-hero__box::before {
  content: "";
  position: absolute;
  inset: 10px;
  border: 1px dashed rgba(58, 46, 94, .9);
  pointer-events: none;
}

.page-about .ab-hero__box::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 6px;
  background: repeating-linear-gradient(90deg, var(--gold) 0 2px, transparent 2px 16px);
  opacity: .45;
  pointer-events: none;
}

.page-about .ab-hero__anno {
  position: relative;
  margin: 0 0 clamp(16px, 2.4vw, 24px);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .22em;
  color: var(--gold);
}

.page-about .ab-hero__title {
  position: relative;
  margin: 0 0 clamp(16px, 2.4vw, 24px);
  max-width: 20ch;
  color: var(--ink);
}

.page-about .ab-hero__lead {
  position: relative;
  max-width: 62ch;
  margin: 0 0 clamp(22px, 3vw, 32px);
  font-size: clamp(15px, 1.1vw, 17px);
  line-height: 1.85;
  color: var(--ink-2);
}

.page-about .ab-hero__acts {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .ab-hero__facts {
  position: relative;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(14px, 2.4vw, 24px);
  margin: clamp(26px, 4vw, 44px) 0 0;
  padding: clamp(18px, 2.6vw, 26px) 0 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-about .ab-hero__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(20px, 2.4vw, 28px);
  font-weight: 600;
  line-height: 1.1;
  color: var(--gold);
}

.page-about .ab-hero__key {
  display: block;
  margin-top: 7px;
  font-size: 12px;
  letter-spacing: .05em;
  color: var(--ink-2);
}

@media (min-width: 720px) {
  .page-about .ab-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 通用章节骨架 ---------- */
.page-about .ab-sec {
  position: relative;
  padding: clamp(36px, 5.6vw, 74px) 0;
}

.page-about .ab-sec__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(14px, 2.2vw, 24px);
}

.page-about .ab-sec__anno {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .2em;
  color: var(--neon);
}

.page-about .ab-sec__body > p {
  max-width: 68ch;
  margin: 0 0 1.05em;
  font-size: clamp(15px, 1.05vw, 17px);
  line-height: 1.85;
  color: var(--ink-2);
}

.page-about .ab-sec__body > p:last-child {
  margin-bottom: 0;
}

.page-about .ab-timeline {
  background: linear-gradient(180deg, transparent, rgba(21, 13, 43, .78) 10%, rgba(21, 13, 43, .78) 90%, transparent);
}

@media (min-width: 900px) {
  .page-about .ab-sec__inner {
    grid-template-columns: 128px minmax(0, 1fr);
    gap: clamp(22px, 3.2vw, 52px);
  }

  .page-about .ab-sec__anno {
    writing-mode: vertical-rl;
    text-orientation: mixed;
    letter-spacing: .3em;
    padding-top: 8px;
    justify-self: start;
  }
}

/* ---------- 图片容器 ---------- */
.page-about .ab-fig {
  margin: clamp(22px, 3.2vw, 34px) 0 0;
}

.page-about .ab-fig .frame {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--bg-deep);
}

.page-about .ab-fig .frame img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .ab-fig .frame__cap {
  display: block;
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--ink-2);
}

.page-about .ab-fig--wide {
  margin-top: clamp(20px, 3vw, 30px);
}

/* ---------- 阶段跳转 ---------- */
.page-about .tl__jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 10px;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .tl__jump a {
  display: inline-block;
  padding: 7px 12px;
  border: 1px solid var(--line);
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--ink-2);
  text-decoration: none;
  transition: color .22s var(--ease), border-color .22s var(--ease), background .22s var(--ease);
}

.page-about .tl__jump a:hover,
.page-about .tl__jump a:focus-visible {
  color: var(--ink);
  border-color: var(--neon);
  background: rgba(164, 92, 255, .14);
}

/* ---------- 时间线 ---------- */
.page-about .tl {
  position: relative;
  margin: clamp(26px, 4vw, 46px) 0 0;
  padding: 0 0 0 44px;
  list-style: none;
}

.page-about .tl::before {
  content: "";
  position: absolute;
  left: 13px;
  top: 14px;
  bottom: 14px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg,
    var(--gold) 0%,
    var(--neon) 34%,
    var(--cyan) 70%,
    rgba(53, 240, 192, .22) 100%);
}

.page-about .tl__item {
  position: relative;
  padding: 22px 0 30px;
  scroll-margin-top: 90px;
}

.page-about .tl__item::before {
  content: "";
  position: absolute;
  left: -37px;
  top: 30px;
  width: 12px;
  height: 12px;
  border-radius: 2px;
  background: var(--bg);
  border: 2px solid var(--gold);
  box-shadow: 0 0 0 4px rgba(255, 196, 77, .1);
  transition: border-color .25s var(--ease), box-shadow .25s var(--ease), transform .25s var(--ease);
}

.page-about .tl__item:hover::before,
.page-about .tl__item:focus-within::before {
  border-color: var(--cyan);
  box-shadow: 0 0 0 6px rgba(47, 224, 255, .16);
  transform: scale(1.08);
}

.page-about .tl__ver {
  display: inline-block;
  padding: 3px 9px;
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .12em;
  color: var(--bg-deep);
  background: var(--gold);
}

.page-about .tl__when {
  display: block;
  margin-top: 9px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--ink-2);
}

.page-about .tl__title {
  margin: .55em 0 .5em;
  font-size: clamp(19px, 2.1vw, 25px);
  line-height: 1.4;
  color: var(--ink);
}

.page-about .tl__text {
  max-width: 62ch;
  margin: 0;
  font-size: clamp(14px, 1vw, 16px);
  line-height: 1.85;
  color: var(--ink-2);
}

.page-about .tl__mark {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin: 12px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--mint);
}

.page-about .tl__mark::before {
  content: "";
  width: 18px;
  height: 1px;
  background: currentColor;
  opacity: .65;
}

/* ---------- 小版本折叠 ---------- */
.page-about .tl__minor {
  margin-top: 16px;
  padding-left: 14px;
  border-left: 1px solid var(--line);
}

.page-about .tl__minor > summary {
  padding: 5px 0;
  list-style: none;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .05em;
  color: var(--cyan);
}

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

.page-about .tl__minor > summary::before {
  content: "▸ ";
  color: var(--neon);
}

.page-about .tl__minor[open] > summary::before {
  content: "▾ ";
}

.page-about .tl__minor ul {
  margin: 6px 0 0;
  padding: 0 0 0 16px;
  list-style: none;
}

.page-about .tl__minor li {
  position: relative;
  padding: 3px 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--ink-2);
}

.page-about .tl__minor li::before {
  content: "";
  position: absolute;
  left: -14px;
  top: 12px;
  width: 6px;
  height: 1px;
  background: var(--line);
}

@media (min-width: 900px) {
  .page-about .tl {
    padding-left: 0;
  }

  .page-about .tl::before {
    left: 31%;
  }

  .page-about .tl__item {
    display: grid;
    grid-template-columns: 31% minmax(0, 1fr);
    column-gap: clamp(30px, 4.4vw, 68px);
    padding: 26px 0 38px;
  }

  .page-about .tl__item::before {
    left: calc(31% - 7px);
    top: 34px;
  }

  .page-about .tl__stamp {
    text-align: right;
  }
}

/* ---------- 索引条目列表 ---------- */
.page-about .ab-rows {
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-about .ab-rows > li {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 5px;
  padding: 15px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .ab-rows__k {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .12em;
  color: var(--gold);
}

.page-about .ab-rows__v {
  font-size: clamp(14px, 1vw, 16px);
  line-height: 1.8;
  color: var(--ink-2);
}

.page-about .ab-rows__v b {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--ink);
}

@media (min-width: 720px) {
  .page-about .ab-rows > li {
    grid-template-columns: minmax(0, 190px) minmax(0, 1fr);
    gap: clamp(16px, 3vw, 40px);
    align-items: baseline;
  }
}

/* ---------- 赛季阶段刻度 ---------- */
.page-about .ab-season {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(20px, 3vw, 28px) 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .ab-season > li {
  padding: 16px 15px;
  background: var(--bg-panel);
}

.page-about .ab-season__idx {
  display: block;
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 600;
  line-height: 1;
  color: var(--gold);
}

.page-about .ab-season__span {
  display: block;
  margin-top: 9px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .05em;
  color: var(--ink-2);
}

@media (min-width: 720px) {
  .page-about .ab-season {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 团队 ---------- */
.page-about .ab-team {
  display: grid;
  gap: clamp(16px, 2.4vw, 28px);
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .ab-team > li {
  padding-top: 18px;
  border-top: 2px solid var(--line);
}

.page-about .ab-team > li:nth-child(1) {
  border-top-color: var(--gold);
}

.page-about .ab-team > li:nth-child(2) {
  border-top-color: var(--neon);
}

.page-about .ab-team > li:nth-child(3) {
  border-top-color: var(--cyan);
}

.page-about .ab-team__n {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.4vw, 38px);
  font-weight: 600;
  line-height: 1;
  color: var(--ink);
}

.page-about .ab-team__r {
  display: block;
  margin-top: 9px;
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
}

.page-about .ab-team__d {
  margin: 9px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-2);
}

@media (min-width: 780px) {
  .page-about .ab-team {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 地域与备案信息 ---------- */
.page-about .ab-info {
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: clamp(20px, 3vw, 30px);
  border: 1px solid var(--line);
  border-left: 3px solid var(--gold);
  background: var(--bg-panel);
}

.page-about .ab-info__list {
  margin: 0;
}

.page-about .ab-info__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 3px;
  padding: 11px 0;
  border-bottom: 1px solid rgba(58, 46, 94, .55);
}

.page-about .ab-info__row:last-child {
  border-bottom: 0;
}

.page-about .ab-info__row dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--ink-2);
}

.page-about .ab-info__row dd {
  margin: 0;
  font-size: clamp(14px, 1vw, 16px);
  line-height: 1.7;
  color: var(--ink);
  overflow-wrap: anywhere;
}

.page-about .ab-info__mono {
  font-family: var(--font-mono);
  letter-spacing: .04em;
}

.page-about .ab-info__note {
  margin: clamp(16px, 2.4vw, 24px) 0 0;
  font-size: 13px;
  line-height: 1.85;
  color: var(--ink-2);
}

.page-about .ab-info__note a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 224, 255, .45);
}

.page-about .ab-info__note a:hover,
.page-about .ab-info__note a:focus-visible {
  border-bottom-color: var(--cyan);
}

.page-about .ab-copy {
  margin-top: clamp(14px, 2vw, 20px);
}

@media (min-width: 720px) {
  .page-about .ab-info__row {
    grid-template-columns: minmax(0, 170px) minmax(0, 1fr);
    gap: clamp(14px, 2.4vw, 32px);
    align-items: baseline;
    padding: 12px 0;
  }
}

/* ---------- 底部指引 ---------- */
.page-about .ab-cta {
  padding: clamp(34px, 5vw, 64px) 0 0;
}

.page-about .ab-cta__links {
  display: grid;
  gap: 1px;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .ab-cta__links > li {
  background: var(--bg);
}

.page-about .ab-cta__links a {
  display: block;
  padding: clamp(16px, 2.4vw, 22px) clamp(16px, 2.6vw, 24px);
  text-decoration: none;
  transition: background .22s var(--ease);
}

.page-about .ab-cta__links a:hover,
.page-about .ab-cta__links a:focus-visible {
  background: rgba(164, 92, 255, .12);
}

.page-about .ab-cta__t {
  display: block;
  font-size: clamp(16px, 1.4vw, 19px);
  font-weight: 600;
  color: var(--ink);
}

.page-about .ab-cta__t::after {
  content: " →";
  color: var(--cyan);
}

.page-about .ab-cta__d {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-2);
}

@media (min-width: 720px) {
  .page-about .ab-cta__links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1100px) {
  .page-about .ab-cta__links {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 降低动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .tl__item::before,
  .page-about .tl__jump a,
  .page-about .ab-cta__links a {
    transition: none;
  }
}