.page-about {
  --about-rule: rgba(76, 127, 176, .24);
  --about-rule-soft: rgba(76, 127, 176, .12);
  --about-deep-fill: rgba(30, 44, 70, .48);
  --about-ink-mute: rgba(10, 15, 26, .68);
  --about-ink-faint: rgba(10, 15, 26, .48);
}

/* ---------- 首屏拼贴 ---------- */
.page-about .about-hero {
  display: grid;
  gap: 16px;
  padding: clamp(20px, 4vw, 40px) 0 clamp(26px, 5vw, 52px);
}

.page-about .about-hero__main {
  padding: clamp(20px, 3.4vw, 40px);
  border-radius: 6px;
}

.page-about .about-hero__main h1 {
  margin: 14px 0 0;
  font-size: clamp(30px, 6.4vw, 54px);
  line-height: 1.08;
  letter-spacing: -.02em;
  font-weight: 900;
  color: var(--paper);
}

.page-about .about-hero__lede {
  margin: 18px 0 0;
  max-width: 42em;
  font-size: 15px;
  line-height: 1.9;
  color: var(--snow);
}

.page-about .about-hero__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 22px;
}

.page-about .about-hero__aside {
  display: grid;
  gap: 10px;
}

.page-about .about-jump {
  display: grid;
  gap: 5px;
  padding: 14px 16px;
  border: 1px solid var(--about-rule);
  border-left: 3px solid var(--glacier);
  border-radius: 4px;
  background: var(--glass);
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .about-jump:hover,
.page-about .about-jump:focus-visible {
  border-left-color: var(--flare);
  background: rgba(255, 90, 31, .07);
}

.page-about .about-jump__k {
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--glacier);
}

.page-about .about-jump__t {
  font-size: 14px;
  line-height: 1.7;
  color: var(--paper);
}

@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.62fr) minmax(230px, .88fr);
    align-items: end;
    gap: 30px;
  }
}

/* ---------- 通用面板内文 ---------- */
.page-about .panel p {
  color: var(--snow);
}

.page-about .panel .panel__title {
  color: var(--paper);
}

/* ---------- 平台定位 ---------- */
.page-about .about-points {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--about-rule-soft);
}

.page-about .about-point {
  display: grid;
  gap: 6px;
  padding: 16px 0;
  border-bottom: 1px solid var(--about-rule-soft);
}

.page-about .about-point__k {
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--glacier);
  font-weight: 700;
}

.page-about .about-point__v {
  font-size: 15px;
  line-height: 1.85;
  color: var(--snow);
}

@media (min-width: 820px) {
  .page-about .about-points {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 40px;
  }
}

/* ---------- 覆盖范围（浅色换气面板） ---------- */
.page-about .about-coverage {
  color: var(--void);
}

.page-about .about-coverage .panel__kicker,
.page-about .about-coverage .panel__title {
  color: var(--void);
}

.page-about .about-coverage .panel__kicker {
  color: var(--flare);
}

.page-about .about-coverage__lede {
  max-width: 44em;
  font-size: 15px;
  line-height: 1.9;
  color: var(--about-ink-mute) !important;
}

.page-about .about-figures {
  display: grid;
  gap: 1px;
  margin-top: 26px;
  border: 1px solid rgba(30, 44, 70, .16);
  border-radius: 4px;
  overflow: hidden;
  background: rgba(30, 44, 70, .14);
}

.page-about .about-figure {
  display: grid;
  gap: 6px;
  padding: 16px 16px 18px;
  background: var(--paper);
}

.page-about .about-figure .num {
  font-size: clamp(24px, 4.6vw, 34px);
  font-weight: 900;
  letter-spacing: -.02em;
  line-height: 1;
  color: var(--void);
}

.page-about .about-figure__k {
  font-size: 12px;
  letter-spacing: .05em;
  color: var(--about-ink-faint);
}

@media (min-width: 640px) {
  .page-about .about-figures {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 联赛筛选 ---------- */
.page-about .about-coverage__filter {
  margin-top: 30px;
}

.page-about .about-coverage .filter-bar__label {
  color: var(--about-ink-mute);
}

.page-about .about-coverage .filter-btn {
  border-color: rgba(30, 44, 70, .26);
  color: var(--about-ink-mute);
  background: transparent;
}

.page-about .about-coverage .filter-btn:hover {
  border-color: var(--glacier);
  color: var(--void);
}

.page-about .about-coverage .filter-btn[aria-pressed="true"] {
  background: var(--flare);
  border-color: var(--flare);
  color: #FFFFFF;
}

.page-about .about-leagues {
  display: grid;
  gap: 10px;
  margin-top: 18px;
}

.page-about .about-league {
  padding: 14px 16px;
  border: 1px solid rgba(30, 44, 70, .16);
  border-left: 3px solid var(--glacier);
  border-radius: 3px;
  background: rgba(255, 255, 255, .52);
  transition: border-left-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .about-league:hover {
  border-left-color: var(--flare);
  background: rgba(255, 255, 255, .78);
}

.page-about .about-league__t {
  margin: 0;
  font-size: 15px;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--void);
}

.page-about .about-league__d {
  margin: 6px 0 0;
  font-size: 13.5px;
  line-height: 1.85;
  color: var(--about-ink-mute) !important;
}

.page-about .about-coverage .filter-empty {
  margin-top: 14px;
  font-size: 13.5px;
  color: var(--about-ink-mute);
}

@media (min-width: 760px) {
  .page-about .about-leagues {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
  }
}

/* ---------- 更新节奏三步 ---------- */
.page-about .about-flow {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-flow__step {
  position: relative;
  display: grid;
  gap: 6px;
  padding: 18px 18px 20px;
  border: 1px solid var(--about-rule-soft);
  border-radius: 4px;
  background: var(--about-deep-fill);
}

.page-about .about-flow__idx {
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--flare);
}

.page-about .about-flow__t {
  margin: 0;
  font-size: 16px;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-about .about-flow__step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--snow);
}

@media (min-width: 760px) {
  .page-about .about-flow {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0;
    border-left: 1px solid var(--about-rule-soft);
  }

  .page-about .about-flow__step {
    border: 0;
    border-right: 1px solid var(--about-rule-soft);
    border-radius: 0;
    background: transparent;
    padding: 4px 22px 6px;
  }

  .page-about .about-flow__step:first-child {
    padding-left: 0;
    border-left: 1px solid var(--about-rule-soft);
  }
}

/* ---------- 团队 ---------- */
.page-about .about-team__grid {
  display: grid;
  gap: 16px;
}

.page-about .about-team__body {
  order: 2;
}

.page-about .about-team__media {
  order: 1;
  border-radius: 4px;
  overflow: hidden;
}

@media (min-width: 900px) {
  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    align-items: start;
    gap: 28px;
  }

  .page-about .about-team__body {
    order: 1;
  }

  .page-about .about-team__media {
    order: 2;
  }
}

.page-about .about-roles {
  margin-top: 22px;
  border-top: 1px solid var(--about-rule-soft);
}

.page-about .about-role {
  border-bottom: 1px solid var(--about-rule-soft);
}

.page-about .about-role__sum {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 14px 0;
  cursor: pointer;
  list-style: none;
  font-size: 14.5px;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--paper);
  transition: color var(--dur) var(--ease);
}

.page-about .about-role__sum::-webkit-details-marker {
  display: none;
}

.page-about .about-role__sum::before {
  content: "+";
  flex: none;
  width: 16px;
  font-size: 15px;
  color: var(--glacier);
}

.page-about .about-role[open] .about-role__sum::before {
  content: "–";
  color: var(--flare);
}

.page-about .about-role__sum:hover,
.page-about .about-role__sum:focus-visible {
  color: var(--flare);
}

.page-about .about-role__body {
  margin: 0 0 16px 26px;
  font-size: 14px;
  line-height: 1.9;
  color: var(--snow);
}

/* ---------- 版本时间线 ---------- */
.page-about .about-timeline {
  list-style: none;
  position: relative;
  margin: 30px 0 0;
  padding: 0;
  display: grid;
  gap: 20px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--gold) 0%, var(--flare) 62%, transparent 100%);
}

.page-about .about-timeline__item {
  position: relative;
  display: grid;
  gap: 3px;
  padding-left: 30px;
  outline: none;
  transition: opacity var(--dur) var(--ease);
}

.page-about .about-timeline__dot {
  position: absolute;
  left: 0;
  top: 5px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--void);
  border: 2px solid var(--gold);
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .about-timeline__ver {
  font-size: 20px;
  font-weight: 900;
  letter-spacing: -.02em;
  line-height: 1.1;
  color: var(--paper);
}

.page-about .about-timeline__stage {
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--glacier);
}

.page-about .about-timeline__d {
  margin: 6px 0 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--snow);
}

.page-about .about-timeline__item:hover .about-timeline__dot,
.page-about .about-timeline__item:focus-visible .about-timeline__dot {
  border-color: var(--flare);
  box-shadow: 0 0 0 5px rgba(255, 90, 31, .18);
}

@media (min-width: 900px) {
  .page-about .about-timeline {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0;
  }

  .page-about .about-timeline::before {
    left: 6px;
    right: 6px;
    top: 6px;
    bottom: auto;
    width: auto;
    height: 1px;
    background: linear-gradient(90deg, var(--gold) 0%, var(--flare) 58%, transparent 100%);
  }

  .page-about .about-timeline__item {
    padding: 26px 22px 0 0;
  }

  .page-about .about-timeline__item:first-child {
    padding-left: 0;
  }
}

/* ---------- 区域与用户 ---------- */
.page-about .about-region {
  display: grid;
  gap: 18px;
}

.page-about .about-region__grid {
  display: grid;
  gap: 18px;
}

.page-about .about-region__title {
  margin: 12px 0 0;
  font-size: clamp(22px, 3.4vw, 32px);
  line-height: 1.24;
  letter-spacing: -.02em;
  font-weight: 900;
  color: var(--paper);
}

.page-about .about-region__lede {
  margin: 16px 0 0;
  max-width: 42em;
  font-size: 15px;
  line-height: 1.9;
  color: var(--snow);
}

.page-about .about-region .data-list {
  margin: 22px 0 0;
  padding: 0;
  border-top: 1px solid var(--about-rule-soft);
}

.page-about .about-region .data-list__row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px 18px;
  padding: 12px 0;
  border-bottom: 1px solid var(--about-rule-soft);
}

.page-about .about-region .data-list__label {
  margin: 0;
  font-size: 12.5px;
  letter-spacing: .08em;
  color: var(--glacier);
}

.page-about .about-region .data-list__value {
  margin: 0;
  font-size: 14px;
  color: var(--paper);
}

.page-about .about-region__media,
.page-about .about-region__map {
  border-radius: 4px;
  overflow: hidden;
}

@media (min-width: 900px) {
  .page-about .about-region__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
    align-items: start;
    gap: 32px;
  }
}

/* ---------- 数据来源与协作 ---------- */
.page-about .about-source__grid {
  display: grid;
  gap: 20px;
  margin-top: 4px;
}

.page-about .about-source__col p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.9;
  color: var(--snow);
}

.page-about .about-source__col p:last-child {
  margin-bottom: 0;
}

.page-about .about-source__h {
  margin: 0 0 12px;
  font-size: 16px;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-about .about-source__cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

@media (min-width: 820px) {
  .page-about .about-source__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    gap: 40px;
  }

  .page-about .about-source__col + .about-source__col {
    padding-left: 36px;
    border-left: 1px solid var(--about-rule-soft);
  }
}

/* ---------- 收束行动带 ---------- */
.page-about .about-cta {
  margin: 0 0 clamp(36px, 6vw, 72px);
}

.page-about .about-cta__inner {
  position: relative;
  display: grid;
  gap: 20px;
  padding: clamp(24px, 4vw, 40px);
  border-radius: 6px;
  border: 1px solid var(--about-rule);
  background:
    radial-gradient(120% 140% at 8% 0%, rgba(76, 127, 176, .22) 0%, transparent 58%),
    linear-gradient(120deg, rgba(255, 90, 31, .12) 0%, rgba(10, 15, 26, 0) 55%),
    var(--ink);
}

.page-about .about-cta__inner::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 2px;
  border-radius: 6px 6px 0 0;
  background: linear-gradient(90deg, var(--flare), rgba(255, 90, 31, 0) 72%);
}

.page-about .about-cta__t {
  margin: 0;
  font-size: clamp(20px, 3vw, 28px);
  font-weight: 900;
  letter-spacing: -.02em;
  color: var(--paper);
}

.page-about .about-cta__d {
  margin: 12px 0 0;
  max-width: 42em;
  font-size: 14.5px;
  line-height: 1.9;
  color: var(--snow);
}

@media (min-width: 820px) {
  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 32px;
  }
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-jump,
  .page-about .about-league,
  .page-about .about-timeline__dot,
  .page-about .about-timeline__item,
  .page-about .about-role__sum {
    transition: none;
  }
}