.page-about {
  --about-rule: rgba(30, 58, 95, 0.55);
  --about-rule-soft: rgba(30, 58, 95, 0.3);
  --about-glow: rgba(56, 242, 208, 0.26);
  --about-cyan-wash: rgba(56, 242, 208, 0.07);

  background-color: var(--ink-900);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: var(--fs-16);
  line-height: 1.75;
  padding-bottom: clamp(56px, 9vw, 112px);
  overflow-x: clip;
}

.page-about p {
  margin: 0 0 16px;
}

.page-about h2,
.page-about h3 {
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: -0.02em;
  margin: 0;
}

/* ---------- 面包屑 ---------- */

.page-about .about-crumb {
  padding-top: clamp(20px, 3vw, 34px);
}

/* ---------- 首屏 ---------- */

.page-about .about-lead {
  padding-top: clamp(26px, 4.5vw, 50px);
}

.page-about .about-lead__kicker {
  color: var(--stone);
  display: block;
}

.page-about .about-lead__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: var(--fs-40);
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin: 14px 0 0;
  max-width: 14em;
}

.page-about .about-lead__text {
  margin: 22px 0 0;
  max-width: 40em;
  color: var(--paper-82);
}

.page-about .about-stats {
  list-style: none;
  margin: clamp(32px, 5vw, 52px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background-color: var(--about-rule);
  border: 1px solid var(--about-rule);
}

.page-about .about-stat {
  background-color: var(--ink-800);
  padding: 18px 16px 20px;
  min-width: 0;
}

.page-about .about-stat__num {
  display: block;
  font-family: var(--font-data);
  font-size: var(--fs-28);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.01em;
  color: var(--cyan);
  text-shadow: 0 0 12px var(--about-glow);
  word-break: keep-all;
}

.page-about .about-stat__label {
  display: block;
  margin-top: 8px;
  font-size: var(--fs-12);
  letter-spacing: 0.1em;
  line-height: 1.5;
  color: var(--stone);
}

/* ---------- 章节骨架 ---------- */

.page-about .about-section {
  padding-top: clamp(52px, 8vw, 96px);
}

.page-about .about-section__head {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
  border-top: 1px solid var(--about-rule);
  padding-top: 16px;
  margin-bottom: clamp(22px, 3.5vw, 34px);
}

.page-about .about-index {
  font-family: var(--font-data);
  font-size: var(--fs-12);
  letter-spacing: 0.18em;
  color: var(--orange);
}

.page-about .about-section__title {
  font-size: var(--fs-28);
  line-height: 1.22;
  max-width: 22em;
}

.page-about .about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 40px);
}

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

.page-about .about-inline-note {
  margin: clamp(20px, 3vw, 28px) 0 0;
  padding-left: 16px;
  border-left: 2px solid var(--about-rule);
  font-size: var(--fs-14);
  color: var(--paper-64);
  max-width: 62em;
}

.page-about .about-inline-note a {
  color: var(--paper);
  text-decoration: underline;
  text-decoration-color: var(--line);
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
  transition: color 0.15s var(--ease), text-decoration-color 0.15s var(--ease);
}

.page-about .about-inline-note a:hover,
.page-about .about-inline-note a:focus-visible {
  color: var(--cyan);
  text-decoration-color: var(--cyan);
}

/* ---------- 旁注 ---------- */

.page-about .about-note {
  border-left: 1px solid var(--about-rule);
  padding-left: 16px;
  font-size: var(--fs-14);
  color: var(--paper-64);
}

.page-about .about-note__h {
  display: block;
  font-family: var(--font-data);
  font-size: var(--fs-12);
  letter-spacing: 0.14em;
  color: var(--stone);
  margin-bottom: 12px;
}

.page-about .about-note__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-note__list li {
  position: relative;
  padding-left: 16px;
  margin: 0;
}

.page-about .about-note__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 7px;
  height: 1px;
  background-color: var(--cyan);
}

/* ---------- 图片容器 ---------- */

.page-about .about-fig {
  margin: 28px 0 0;
  border: 1px solid var(--about-rule);
  background-color: var(--ink-800);
  overflow: hidden;
}

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

.page-about .about-fig__cap {
  display: block;
  padding: 10px 14px;
  border-top: 1px solid var(--about-rule);
  font-size: var(--fs-12);
  letter-spacing: 0.12em;
  line-height: 1.6;
  color: var(--stone);
}

.page-about .about-fig--full {
  margin-top: 0;
}

/* ---------- 时间线 ---------- */

.page-about .about-timeline {
  list-style: none;
  margin: 34px 0 0;
  padding: 0 0 0 30px;
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 18px;
  width: 1px;
  background-image: linear-gradient(to bottom, rgba(56, 242, 208, 0.42), rgba(30, 58, 95, 0.5));
}

.page-about .about-timeline__item {
  position: relative;
  padding-bottom: 26px;
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 7px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background-color: var(--ink-900);
  border: 1px solid var(--line);
  transition: background-color 0.15s var(--ease), border-color 0.15s var(--ease);
}

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

.page-about .about-timeline__mark {
  display: block;
  font-family: var(--font-data);
  font-size: var(--fs-14);
  letter-spacing: 0.04em;
  color: var(--cyan);
}

.page-about .about-timeline__h {
  font-size: var(--fs-20);
  line-height: 1.3;
  margin: 6px 0 4px;
  color: var(--paper);
}

.page-about .about-timeline__p {
  margin: 0;
  max-width: 46em;
  color: var(--paper-64);
  font-size: var(--fs-14);
}

/* ---------- 三段流程 ---------- */

.page-about .about-flow {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background-color: var(--about-rule);
  border: 1px solid var(--about-rule);
}

.page-about .about-flow__step {
  background-color: var(--ink-800);
  padding: 22px 20px 24px;
  border-top: 2px solid var(--line);
  transition: background-color 0.15s var(--ease);
}

.page-about .about-flow__step:nth-child(1) {
  border-top-color: var(--cyan);
}

.page-about .about-flow__step:nth-child(2) {
  border-top-color: var(--moss);
}

.page-about .about-flow__step:nth-child(3) {
  border-top-color: var(--clay);
}

.page-about .about-flow__step:hover {
  background-color: #13244d;
}

.page-about .about-flow__no {
  display: block;
  font-family: var(--font-data);
  font-size: var(--fs-12);
  letter-spacing: 0.16em;
  color: var(--stone);
}

.page-about .about-flow__h {
  font-size: var(--fs-20);
  line-height: 1.3;
  margin: 10px 0 8px;
}

.page-about .about-flow__p {
  margin: 0;
  font-size: var(--fs-14);
  color: var(--paper-64);
}

/* ---------- 赛区分组 ---------- */

.page-about .about-zones {
  list-style: none;
  margin: 8px 0 0;
  padding: 0;
  border-top: 1px solid var(--about-rule);
}

.page-about .about-zones__item {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  align-items: baseline;
  gap: 2px 14px;
  padding: 14px 0;
  border-bottom: 1px solid var(--about-rule-soft);
}

.page-about .about-zones__count {
  grid-row: 1 / span 2;
  font-family: var(--font-data);
  font-size: var(--fs-28);
  font-weight: 700;
  line-height: 1.1;
  color: var(--cyan);
  text-shadow: 0 0 12px var(--about-glow);
}

.page-about .about-zones__name {
  font-size: var(--fs-16);
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-zones__desc {
  font-size: var(--fs-14);
  line-height: 1.6;
  color: var(--stone);
}

/* ---------- 指标清单 ---------- */

.page-about .about-metrics {
  margin-top: clamp(34px, 5vw, 54px);
  border-top: 1px solid var(--about-rule);
}

.page-about .about-metrics__hint {
  display: block;
  padding: 14px 0 12px;
  margin: 0;
  color: var(--stone);
  border-bottom: 1px solid var(--about-rule-soft);
}

.page-about .about-metric + .about-metric {
  border-top: 1px solid var(--about-rule-soft);
}

.page-about .about-metric__btn {
  width: 100%;
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 6px 14px;
  padding: 15px 8px;
  background: none;
  border: 0;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
  transition: background-color 0.15s var(--ease);
}

.page-about .about-metric__btn:hover,
.page-about .about-metric__btn:focus-visible {
  background-color: var(--about-cyan-wash);
}

.page-about .about-metric__no {
  font-family: var(--font-data);
  font-size: var(--fs-12);
  letter-spacing: 0.12em;
  color: var(--stone);
}

.page-about .about-metric__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-16);
  color: var(--paper);
}

.page-about .about-metric__unit {
  font-family: var(--font-data);
  font-size: var(--fs-12);
  letter-spacing: 0.08em;
  color: var(--moss);
}

.page-about .about-metric__panel {
  padding: 0 8px 16px 8px;
}

.page-about .about-metric__panel p {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.7;
  color: var(--paper-64);
  max-width: 56em;
}

/* ---------- 更新节奏 ---------- */

.page-about .about-cadence {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background-color: var(--about-rule);
  border: 1px solid var(--about-rule);
}

.page-about .about-cadence__card {
  background-color: var(--ink-800);
  padding: 22px 20px 24px;
  border-left: 3px solid var(--line);
}

.page-about .about-cadence__card:nth-child(1) {
  border-left-color: var(--cyan);
}

.page-about .about-cadence__card:nth-child(2) {
  border-left-color: var(--orange);
}

.page-about .about-cadence__time {
  margin: 10px 0 8px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: var(--fs-28);
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-cadence__clock {
  font-family: var(--font-data);
  font-weight: 700;
  color: var(--cyan);
  text-shadow: 0 0 12px var(--about-glow);
}

.page-about .about-cadence__p {
  margin: 0;
  font-size: var(--fs-14);
  color: var(--paper-64);
}

.page-about .about-span {
  margin-top: clamp(24px, 3.5vw, 34px);
}

.page-about .about-span__bar {
  height: 8px;
  border: 1px solid var(--about-rule);
  background-image: linear-gradient(90deg, var(--moss), var(--cyan) 72%, var(--orange));
  background-color: var(--ink-800);
}

.page-about .about-span__ends {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-top: 10px;
  font-size: var(--fs-12);
  letter-spacing: 0.1em;
  color: var(--stone);
}

.page-about .about-span__end {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
}

.page-about .about-span__val {
  font-family: var(--font-data);
  font-weight: 700;
  font-size: var(--fs-14);
  color: var(--paper);
}

/* ---------- 团队 ---------- */

.page-about .about-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background-color: var(--about-rule);
  border: 1px solid var(--about-rule);
}

.page-about .about-team__card {
  background-color: var(--ink-800);
  padding: 24px 20px 26px;
  border-top: 2px solid var(--line);
}

.page-about .about-team__card:nth-child(1) {
  border-top-color: var(--cyan);
}

.page-about .about-team__card:nth-child(2) {
  border-top-color: var(--moss);
}

.page-about .about-team__card:nth-child(3) {
  border-top-color: var(--clay);
}

.page-about .about-team__n {
  display: block;
  font-family: var(--font-data);
  font-size: var(--fs-28);
  font-weight: 700;
  line-height: 1;
  color: var(--paper);
}

.page-about .about-team__h {
  font-size: var(--fs-20);
  line-height: 1.3;
  margin: 12px 0 8px;
}

.page-about .about-team__p {
  margin: 0;
  font-size: var(--fs-14);
  color: var(--paper-64);
}

/* ---------- 合规边界 ---------- */

.page-about .about-boundary {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 48px);
}

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

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

.page-about .about-links li {
  display: grid;
  gap: 4px;
  padding: 14px 0;
  border-bottom: 1px solid var(--about-rule-soft);
}

.page-about .about-links a {
  justify-self: start;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-16);
  color: var(--paper);
  text-decoration: underline;
  text-decoration-color: var(--line);
  text-decoration-thickness: 1px;
  text-underline-offset: 5px;
  transition: color 0.15s var(--ease), text-decoration-color 0.15s var(--ease);
}

.page-about .about-links a:hover,
.page-about .about-links a:focus-visible {
  color: var(--cyan);
  text-decoration-color: var(--cyan);
}

.page-about .about-links__desc {
  font-size: var(--fs-14);
  line-height: 1.6;
  color: var(--stone);
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-about .about-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-metric__panel {
    padding: 0 8px 18px 60px;
  }
}

@media (min-width: 760px) {
  .page-about .about-section__head {
    grid-template-columns: 56px minmax(0, 1fr);
    align-items: baseline;
    gap: 4px 20px;
  }

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

  .page-about .about-team {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-lead__title {
    font-size: var(--fs-64);
  }

  .page-about .about-boundary {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    align-items: start;
  }
}

@media (min-width: 940px) {
  .page-about .about-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 300px);
    gap: clamp(32px, 4.5vw, 60px);
  }
}

@media (min-width: 1000px) {
  .page-about .about-stats {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-timeline__item::before,
  .page-about .about-flow__step,
  .page-about .about-metric__btn,
  .page-about .about-links a,
  .page-about .about-inline-note a {
    transition: none;
  }
}