.page-about {
  --about-h2: clamp(27px, 4.2vw, 50px);
  --about-sec-pad: clamp(52px, 7.5vw, 104px);
  --about-gap: clamp(20px, 3vw, 36px);
}

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

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-block: clamp(28px, 4vw, 56px) clamp(48px, 7vw, 96px);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(28px, 4vw, 56px);
  align-items: end;
}

.page-about .about-hero__title {
  margin: 0 0 clamp(18px, 2vw, 26px);
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(34px, 6vw, 78px);
  line-height: 1.02;
  letter-spacing: -0.02em;
  color: var(--text);
}

.page-about .about-hero__copy .lede {
  margin: 0 0 clamp(24px, 3vw, 40px);
  color: var(--text);
  opacity: 0.86;
}

.page-about .hero-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(14px, 2vw, 22px);
  margin: 0;
  padding-top: clamp(16px, 2vw, 24px);
  border-top: 1px solid var(--line);
}

.page-about .hero-stats__item {
  display: flex;
  flex-direction: column-reverse;
  gap: 4px;
}

.page-about .hero-stats__item dt {
  color: var(--text-dim);
}

.page-about .hero-stats .num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(30px, 4.2vw, 46px);
  font-weight: 700;
  line-height: 1;
  color: var(--lime);
}

.page-about .hero-stats__unit {
  font-size: 0.5em;
  margin-left: 2px;
  color: var(--text);
}

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

.page-about .about-hero__fig img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--r-organic);
  object-fit: cover;
}

.page-about .about-hero__cap {
  display: block;
  margin-top: 10px;
  color: var(--steel);
  text-align: right;
}

/* ---------- 通用章节 ---------- */
.page-about .about-sec {
  padding-block: var(--about-sec-pad);
  border-top: 1px solid var(--line);
}

.page-about .about-h2 {
  margin: 10px 0 clamp(18px, 2.4vw, 28px);
  font-family: var(--font-head);
  font-weight: 800;
  font-size: var(--about-h2);
  line-height: 1.06;
  letter-spacing: -0.015em;
  color: var(--text);
  max-width: 22ch;
}

/* ---------- 业务起点 ---------- */
.page-about .about-origin {
  background:
    radial-gradient(120% 90% at 8% 0%, rgba(18, 61, 42, 0.85) 0%, rgba(5, 21, 15, 0) 62%),
    var(--ink-950);
}

.page-about .about-origin__grid {
  display: grid;
  gap: clamp(26px, 4vw, 52px);
}

.page-about .about-origin__pull {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(24px, 4vw, 44px);
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--lime);
}

.page-about .about-origin__body p {
  margin: 0 0 16px;
  color: var(--text);
  opacity: 0.84;
}

.page-about .about-origin__body p:last-child {
  margin-bottom: 0;
  color: var(--steel);
  opacity: 1;
}

/* ---------- 三层能力 ---------- */
.page-about .about-layers__intro {
  margin: 0 0 clamp(26px, 3vw, 40px);
  color: var(--text-dim);
}

.page-about .layers {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(14px, 2vw, 20px);
}

.page-about .layer {
  position: relative;
  padding: clamp(22px, 3vw, 34px);
  border-radius: var(--r-organic);
  overflow: hidden;
}

.page-about .layer::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: linear-gradient(90deg, var(--lime), rgba(198, 255, 61, 0));
}

.page-about .layer--1 {
  background: var(--ink-900);
}

.page-about .layer--2 {
  background: var(--ink-800);
}

.page-about .layer--3 {
  background: var(--ink-700);
}

.page-about .layer--2::before {
  background: linear-gradient(90deg, var(--lime-dim), rgba(143, 212, 31, 0));
}

.page-about .layer--3::before {
  background: linear-gradient(90deg, var(--orange), rgba(255, 138, 61, 0));
}

.page-about .layer__idx {
  margin: 0 0 12px;
  color: var(--lime);
  font-size: 13px;
  letter-spacing: 0.12em;
}

.page-about .layer--3 .layer__idx {
  color: var(--orange);
}

.page-about .layer__title {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-size: clamp(21px, 2.4vw, 27px);
  font-weight: 800;
  line-height: 1.2;
  color: var(--text);
}

.page-about .layer__desc {
  margin: 0 0 14px;
  color: var(--text);
  opacity: 0.82;
  font-size: 15px;
  line-height: 1.75;
}

.page-about .layer__meta {
  margin: 0 0 4px;
  color: var(--steel);
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
}

.page-about .layer__toggle {
  margin-top: 14px;
  color: var(--lime);
}

.page-about .layer .disclosure__panel p {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--steel);
}

.page-about .about-layers__link {
  margin: clamp(26px, 3vw, 38px) 0 0;
}

/* ---------- 比赛日流程 ---------- */
.page-about .about-matchday {
  background:
    repeating-linear-gradient(115deg, rgba(11, 42, 30, 0.9) 0 22px, rgba(5, 21, 15, 0.9) 22px 44px),
    var(--ink-950);
}

.page-about .about-matchday__intro {
  margin: 0 0 clamp(24px, 3vw, 36px);
  color: var(--text-dim);
}

.page-about .about-matchday__fig {
  margin: 0 0 clamp(26px, 3vw, 40px);
}

.page-about .about-matchday__fig img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--r-soft);
  object-fit: cover;
}

.page-about .logi {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-about .logi__item {
  position: relative;
  padding: 22px 0 20px;
  border-top: 2px solid var(--line);
  transition: background-color 180ms var(--ease);
}

.page-about .logi__item::before {
  content: "";
  position: absolute;
  top: -5px;
  left: 0;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--ink-700);
  transition: background-color 180ms var(--ease);
}

.page-about .logi__item:hover::before,
.page-about .logi__item:focus-within::before {
  background: var(--lime);
}

.page-about .logi__time {
  margin: 0 0 8px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--lime);
}

.page-about .logi__title {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
}

.page-about .logi__desc {
  margin: 0 0 10px;
  font-size: 14px;
  line-height: 1.72;
  color: var(--text-dim);
}

.page-about .logi__duty {
  margin: 0;
  color: var(--steel);
  opacity: 0.75;
  transition: color 180ms var(--ease), opacity 180ms var(--ease);
}

.page-about .logi__item:hover .logi__duty,
.page-about .logi__item:focus-within .logi__duty {
  color: var(--lime);
  opacity: 1;
}

.page-about .about-matchday__note {
  margin: clamp(20px, 2.5vw, 28px) 0 0;
  color: var(--steel);
}

/* ---------- 合作生态 ---------- */
.page-about .about-eco {
  background: var(--ink-900);
}

.page-about .eco {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  align-items: start;
}

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

.page-about .eco__fig img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--r-organic);
  object-fit: cover;
}

.page-about .eco__fig figcaption {
  margin-top: 10px;
  color: var(--steel);
}

.page-about .eco__body p.measure {
  margin: 0 0 clamp(20px, 2.5vw, 28px);
  color: var(--text);
  opacity: 0.86;
}

.page-about .eco__list {
  list-style: none;
  margin: 0 0 clamp(22px, 3vw, 32px);
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .eco__list li {
  padding-left: 14px;
  border-left: 2px solid var(--lime-dim);
  font-size: 15px;
  line-height: 1.72;
  color: var(--text-dim);
}

.page-about .eco__k {
  display: inline-block;
  margin-right: 8px;
  color: var(--lime);
  font-size: 12px;
  letter-spacing: 0.1em;
}

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

/* ---------- 版本里程碑 ---------- */
.page-about .milestones {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(22px, 3vw, 32px);
}

.page-about .milestone {
  position: relative;
  padding-top: 26px;
  border-top: 1px solid var(--line);
}

.page-about .milestone::before {
  content: "";
  position: absolute;
  top: -6px;
  left: 0;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--ink-700);
  border: 2px solid var(--lime-dim);
}

.page-about .milestone--now::before {
  background: var(--lime);
  border-color: var(--lime);
}

.page-about .milestone--next::before {
  background: transparent;
  border-color: var(--orange);
}

.page-about .milestone__ver {
  margin: 0;
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--text);
}

.page-about .milestone--now .milestone__ver {
  color: var(--lime);
}

.page-about .milestone--next .milestone__ver {
  color: var(--orange);
}

.page-about .milestone__year {
  margin: 4px 0 10px;
  color: var(--steel);
}

.page-about .milestone__title {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 700;
  color: var(--text);
}

.page-about .milestone__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--text-dim);
}

.page-about .milestone__toggle {
  margin-top: 12px;
  color: var(--lime);
}

.page-about .milestone--next .milestone__toggle {
  color: var(--orange);
}

.page-about .milestone .disclosure__panel p {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--steel);
}

/* ---------- 数据可信 ---------- */
.page-about .trust {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(20px, 3vw, 30px);
}

.page-about .trust__item {
  padding: 22px 0 0;
  border-top: 1px solid var(--line);
}

.page-about .trust__idx {
  margin: 0 0 10px;
  color: var(--orange);
  font-size: 13px;
  letter-spacing: 0.14em;
}

.page-about .trust__title {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
}

.page-about .trust__item p:last-child {
  margin: 0;
  font-size: 15px;
  line-height: 1.76;
  color: var(--text-dim);
}

.page-about .about-accuracy__link {
  margin: clamp(26px, 3vw, 38px) 0 0;
}

/* ---------- 结尾 ---------- */
.page-about .about-cta {
  padding-block: clamp(48px, 7vw, 100px);
  background:
    radial-gradient(90% 120% at 88% 100%, rgba(198, 255, 61, 0.16) 0%, rgba(5, 21, 15, 0) 60%),
    var(--ink-800);
  border-top: 1px solid var(--line);
}

.page-about .about-cta__title {
  margin: 0 0 16px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(26px, 4vw, 46px);
  line-height: 1.08;
  letter-spacing: -0.015em;
  color: var(--text);
}

.page-about .about-cta__text {
  margin: 0 0 clamp(22px, 3vw, 32px);
  color: var(--text);
  opacity: 0.84;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .hero-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

  .page-about .milestones {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: clamp(22px, 3vw, 34px);
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
  }

  .page-about .about-hero__fig {
    align-self: end;
  }

  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    align-items: start;
  }

  .page-about .about-origin__pull {
    position: sticky;
    top: clamp(24px, 4vw, 48px);
  }

  .page-about .eco {
    grid-template-columns: minmax(0, 0.86fr) minmax(0, 1.14fr);
  }

  .page-about .logi {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 0;
  }

  .page-about .logi__item {
    padding: 24px clamp(12px, 1.5vw, 20px) 20px 0;
  }

  .page-about .milestones {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}
<<<PAGE_CSS_END>>>