/* ============================================================
   买球官网 · 品牌价值 /values/  —  page-about
   ============================================================ */

.page-about {
  --ab-gap: clamp(56px, 9vw, 118px);
  --ab-num: clamp(58px, 17vw, 164px);
  --ab-text: rgba(241, 246, 238, .78);
  --ab-text-dim: rgba(241, 246, 238, .58);
  --ab-text-strong: rgba(241, 246, 238, .93);
  background-color: var(--ink);
  background-image:
    radial-gradient(130% 55% at 92% -6%, rgba(46, 42, 110, .40), transparent 62%),
    radial-gradient(90% 45% at -10% 36%, rgba(28, 90, 68, .32), transparent 64%);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  overflow-x: clip;
}

/* ---------- 面包屑 ---------- */

.page-about .breadcrumbs {
  padding: clamp(18px, 3vw, 30px) 0 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--gray);
}

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

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

.page-about .breadcrumbs a {
  color: var(--gray);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-about .breadcrumbs a:hover,
.page-about .breadcrumbs a:focus-visible {
  color: var(--lime);
  border-bottom-color: var(--lime);
}

.page-about .breadcrumbs [aria-current] {
  color: var(--orange);
}

/* ---------- 首屏 ---------- */

.page-about .ab-hero {
  padding: clamp(30px, 6vw, 64px) 0 clamp(48px, 8vw, 104px);
}

.page-about .ab-hero__eyebrow {
  display: inline-block;
  font-size: 11px;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--lime);
  border-bottom: 1px solid rgba(198, 255, 61, .42);
  padding-bottom: 6px;
  margin: 0 0 clamp(20px, 3vw, 32px);
}

.page-about .ab-hero__title {
  font-family: var(--font-head);
  font-weight: 200;
  font-size: clamp(34px, 7.2vw, 84px);
  line-height: 1.02;
  letter-spacing: -0.02em;
  margin: 0 0 clamp(20px, 3vw, 34px);
  max-width: 17ch;
  color: var(--paper);
}

.page-about .ab-mark {
  color: var(--lime);
}

.page-about .ab-hero__lede {
  font-size: clamp(16px, 1.9vw, 19px);
  line-height: 1.8;
  color: var(--ab-text);
  max-width: 62ch;
  margin: 0 0 clamp(26px, 4vw, 42px);
}

.page-about .ab-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 10px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .ab-hero__meta li {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--gray);
  border: 1px solid var(--line);
  padding: 6px 12px;
}

/* ---------- 章节骨架 ---------- */

.page-about .ab-sec {
  padding: var(--ab-gap) 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .ab-sec--last {
  padding-bottom: calc(var(--ab-gap) * .7);
}

.page-about .ab-sec__head {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2px 0;
  margin-bottom: clamp(26px, 4.6vw, 58px);
}

.page-about .ab-sec__num {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: var(--ab-num);
  line-height: .78;
  letter-spacing: -0.04em;
  color: transparent;
  -webkit-text-stroke: 1.5px var(--lime);
  margin-left: -0.05em;
  user-select: none;
}

.page-about .ab-sec__kicker {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--orange);
  margin-bottom: 10px;
}

.page-about .ab-sec__title {
  font-family: var(--font-head);
  font-weight: 200;
  font-size: clamp(26px, 4.8vw, 52px);
  line-height: 1.06;
  letter-spacing: -0.015em;
  margin: 0;
  color: var(--paper);
  max-width: 20ch;
}

.page-about .ab-lead {
  font-size: clamp(16px, 1.85vw, 18.5px);
  line-height: 1.8;
  color: var(--ab-text);
  max-width: 64ch;
  margin: 0 0 clamp(26px, 4vw, 44px);
}

/* ---------- 通用图 ---------- */

.page-about .ab-figure {
  margin: 0 0 clamp(28px, 4.4vw, 52px);
}

.page-about .ab-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  background: var(--ink-deep);
  border: 1px solid var(--line);
}

.page-about .ab-figure figcaption {
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.7;
  letter-spacing: .04em;
  color: var(--gray);
  margin-top: 10px;
}

.page-about .ab-figure--wide img {
  aspect-ratio: 2 / 1;
}

.page-about .ab-figure--cadence img {
  aspect-ratio: 10 / 7;
}

/* ---------- 01 入口索引三条 ---------- */

.page-about .ab-axes {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-about .ab-axes__item {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 0 16px;
  padding: clamp(20px, 3.2vw, 32px) 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .ab-axes__code {
  font-size: 11.5px;
  letter-spacing: .08em;
  color: var(--lime);
  padding-top: 7px;
}

.page-about .ab-axes__name {
  font-family: var(--font-head);
  font-weight: 300;
  font-size: clamp(20px, 2.6vw, 28px);
  line-height: 1.28;
  margin: 0 0 8px;
  color: var(--paper);
}

.page-about .ab-axes__text {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--ab-text);
  max-width: 62ch;
}

/* ---------- 02 四类使用者 ---------- */

.page-about .ab-people {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(26px, 4.4vw, 46px);
}

.page-about .ab-person__idx {
  display: block;
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--gray);
  margin-bottom: 12px;
}

.page-about .ab-person__name {
  font-family: var(--font-head);
  font-weight: 300;
  font-size: clamp(21px, 2.6vw, 30px);
  line-height: 1.26;
  margin: 0 0 14px;
  color: var(--paper);
}

.page-about .ab-person__pain {
  margin: 0 0 14px;
  padding-left: 14px;
  border-left: 2px solid var(--orange);
  font-size: 15px;
  line-height: 1.75;
  color: var(--ab-text-dim);
}

.page-about .ab-person__fix {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--ab-text-strong);
}

/* ---------- 03 三板块 ---------- */

.page-about .ab-lanes {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(26px, 4vw, 40px);
}

.page-about .ab-lane {
  padding-top: 18px;
  border-top: 3px solid var(--lane-color, var(--lime));
}

.page-about .ab-lane--member { --lane-color: var(--indigo-lit); }
.page-about .ab-lane--content { --lane-color: var(--wine-lit); }
.page-about .ab-lane--help { --lane-color: var(--lime); }

.page-about .ab-lane__tag {
  display: block;
  font-size: 10.5px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--lane-color, var(--lime));
  margin-bottom: 10px;
}

.page-about .ab-lane__name {
  font-family: var(--font-head);
  font-weight: 300;
  font-size: clamp(24px, 3.2vw, 34px);
  line-height: 1.2;
  margin: 0 0 10px;
  color: var(--paper);
}

.page-about .ab-lane__desc {
  margin: 0 0 16px;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--ab-text);
}

.page-about .ab-lane__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .ab-lane__list li {
  position: relative;
  padding: 9px 0 9px 16px;
  border-bottom: 1px solid var(--line-soft);
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--ab-text-dim);
}

.page-about .ab-lane__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 1.05em;
  width: 6px;
  height: 1px;
  background: var(--lane-color, var(--lime));
}

.page-about .ab-lanes__note {
  margin: clamp(28px, 4vw, 48px) 0 0;
  padding: clamp(18px, 3vw, 28px) clamp(18px, 3vw, 30px);
  border-left: 2px solid var(--lime);
  background: rgba(28, 90, 68, .26);
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--ab-text-strong);
  max-width: 68ch;
}

/* ---------- 04 版本演进 ---------- */

.page-about .ab-version {
  display: grid;
  gap: clamp(30px, 5vw, 56px);
}

.page-about .ab-version__fig {
  margin: 0;
  position: relative;
}

.page-about .ab-version__fig img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  background: var(--ink-deep);
  border: 1px solid var(--line);
}

.page-about .ab-sticker {
  display: inline-block;
  margin-top: 14px;
  padding: 5px 12px;
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--lime);
  border: 1px dashed rgba(198, 255, 61, .5);
  transform: rotate(-1.4deg);
}

.page-about .ab-version__track {
  position: relative;
  padding-left: 18px;
}

.page-about .ab-version__track::before {
  content: "";
  position: absolute;
  left: 3px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background-image: repeating-linear-gradient(to bottom, var(--line-strong) 0 6px, transparent 6px 13px);
}

.page-about .ab-mile {
  border-top: 1px solid var(--line);
}

.page-about .ab-mile:last-child {
  border-bottom: 1px solid var(--line);
}

.page-about .ab-mile__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
  padding: 18px 0;
  cursor: pointer;
  list-style: none;
}

.page-about .ab-mile__head::-webkit-details-marker { display: none; }
.page-about .ab-mile__head::marker { content: ""; }

.page-about .ab-mile__ver {
  flex: 0 0 auto;
  min-width: 3.2em;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--lime);
}

.page-about .ab-mile__name {
  flex: 1 1 auto;
  font-family: var(--font-head);
  font-weight: 300;
  font-size: clamp(20px, 2.6vw, 28px);
  line-height: 1.28;
  color: var(--paper);
}

.page-about .ab-mile__flag {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--orange);
  border: 1px solid rgba(255, 122, 61, .5);
  padding: 3px 9px;
}

.page-about .ab-mile__body {
  margin: 0;
  padding: 0 0 22px;
  max-width: 60ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--ab-text);
}

.page-about .ab-mile[open] > .ab-mile__head {
  padding-bottom: 12px;
}

/* ---------- 05 团队 ---------- */

.page-about .ab-team {
  display: grid;
  gap: clamp(32px, 5vw, 56px);
}

.page-about .ab-roles {
  list-style: none;
  margin: 0 0 clamp(24px, 4vw, 40px);
  padding: 0;
  display: grid;
  gap: clamp(20px, 3vw, 30px);
}

.page-about .ab-role {
  padding-left: 16px;
  border-left: 2px solid var(--role-color, var(--lime));
}

.page-about .ab-roles > li:nth-child(1) { --role-color: var(--lime); }
.page-about .ab-roles > li:nth-child(2) { --role-color: var(--orange); }
.page-about .ab-roles > li:nth-child(3) { --role-color: var(--indigo-lit); }
.page-about .ab-roles > li:nth-child(4) { --role-color: var(--wine-lit); }

.page-about .ab-role__name {
  font-family: var(--font-head);
  font-weight: 300;
  font-size: clamp(20px, 2.4vw, 26px);
  line-height: 1.3;
  margin: 0 0 8px;
  color: var(--paper);
}

.page-about .ab-role__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--ab-text);
  max-width: 54ch;
}

.page-about .ab-team__lede {
  margin: 0;
  padding: clamp(18px, 3vw, 26px) 0 0;
  border-top: 1px solid var(--line);
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--ab-text-strong);
  max-width: 62ch;
}

.page-about .ab-team__aside .ab-figure {
  margin-bottom: 0;
}

/* ---------- 06 承诺 ---------- */

.page-about .ab-promise {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(24px, 3.4vw, 40px);
}

.page-about .ab-promise__k {
  display: block;
  font-size: 11px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--lime);
  margin-bottom: 8px;
}

.page-about .ab-promise__t {
  font-family: var(--font-head);
  font-weight: 300;
  font-size: clamp(20px, 2.4vw, 27px);
  line-height: 1.28;
  margin: 0 0 10px;
  color: var(--paper);
}

.page-about .ab-promise__d {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--ab-text);
  max-width: 56ch;
}

/* ---------- 后续入口 ---------- */

.page-about .ab-next {
  padding: clamp(40px, 6vw, 72px) 0 clamp(56px, 8vw, 96px);
  border-top: 1px solid var(--line);
}

.page-about .ab-next__title {
  font-family: var(--font-head);
  font-weight: 200;
  font-size: clamp(24px, 3.6vw, 40px);
  line-height: 1.1;
  letter-spacing: -0.015em;
  margin: 0 0 clamp(24px, 3.4vw, 40px);
  color: var(--paper);
}

.page-about .ab-next__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}

.page-about .ab-next__link {
  display: grid;
  grid-template-columns: minmax(0, auto) minmax(0, 1fr);
  align-items: baseline;
  gap: 4px 18px;
  padding: clamp(16px, 2.4vw, 22px) clamp(14px, 2vw, 20px);
  background: var(--ink);
  text-decoration: none;
  transition: background-color .22s var(--ease), padding-left .22s var(--ease);
}

.page-about .ab-next__label {
  font-family: var(--font-head);
  font-weight: 300;
  font-size: clamp(19px, 2.2vw, 24px);
  color: var(--paper);
  transition: color .22s var(--ease);
}

.page-about .ab-next__desc {
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--gray);
}

.page-about .ab-next__link:hover,
.page-about .ab-next__link:focus-visible {
  background: rgba(28, 90, 68, .34);
  padding-left: clamp(20px, 3vw, 30px);
}

.page-about .ab-next__link:hover .ab-next__label,
.page-about .ab-next__link:focus-visible .ab-next__label {
  color: var(--lime);
}

/* ---------- 键盘焦点 ---------- */

.page-about a:focus-visible,
.page-about summary:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 3px;
}

/* ---------- 平板及以上 ---------- */

@media (min-width: 760px) {
  .page-about .ab-people {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(30px, 5vw, 72px);
  }

  .page-about .ab-people > li:nth-child(even) {
    margin-top: clamp(26px, 5vw, 68px);
  }

  .page-about .ab-promise {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(32px, 5vw, 76px);
  }

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

  .page-about .ab-mile__body {
    padding-left: calc(3.2em + 14px);
  }
}

/* ---------- 桌面 ---------- */

@media (min-width: 900px) {
  .page-about .ab-sec__head {
    grid-template-columns: minmax(146px, 246px) minmax(0, 1fr);
    column-gap: clamp(22px, 3.4vw, 54px);
    align-items: end;
  }

  .page-about .ab-sec__num {
    font-size: clamp(104px, 12.4vw, 172px);
    margin-bottom: -0.09em;
  }

  .page-about .ab-sec__title {
    max-width: 24ch;
  }

  .page-about .ab-axes__item {
    grid-template-columns: 84px minmax(0, 1fr);
    gap: 0 28px;
  }

  .page-about .ab-lanes {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
    column-gap: clamp(24px, 3.4vw, 46px);
  }

  .page-about .ab-lanes > li:nth-child(2) {
    margin-top: clamp(26px, 4vw, 56px);
  }

  .page-about .ab-lanes > li:nth-child(3) {
    margin-top: clamp(52px, 8vw, 108px);
  }

  .page-about .ab-version {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    column-gap: clamp(34px, 5vw, 76px);
    align-items: start;
  }

  .page-about .ab-figure--wide {
    margin-left: clamp(-40px, -3vw, 0px);
  }
}

@media (min-width: 1060px) {
  .page-about .ab-team {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    column-gap: clamp(38px, 4.4vw, 72px);
    align-items: start;
  }

  .page-about .ab-team__aside {
    margin-top: clamp(20px, 3vw, 44px);
  }

  .page-about .ab-roles {
    grid-template-columns: 1.28fr 1fr;
    column-gap: clamp(28px, 4vw, 54px);
    row-gap: clamp(24px, 3vw, 38px);
  }

  .page-about .ab-roles > li:nth-child(2) { margin-top: clamp(18px, 2.6vw, 40px); }
  .page-about .ab-roles > li:nth-child(4) { margin-top: clamp(18px, 2.6vw, 40px); }

  .page-about .ab-next__link {
    grid-template-columns: minmax(0, auto) minmax(0, 1fr);
  }
}

/* ---------- 减少动态效果 ---------- */

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-next__link,
  .page-about .ab-next__label,
  .page-about .breadcrumbs a {
    transition: none;
  }

  .page-about .ab-sticker {
    transform: none;
  }
}