.page-about {
  --ab-pad: clamp(18px, 4.5vw, 46px);
  --ab-cut: 14px;
  display: block;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(34px, 6vw, 68px) 0 clamp(30px, 5vw, 54px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -22%;
  right: -12%;
  width: min(600px, 88%);
  aspect-ratio: 1 / 1;
  background: radial-gradient(circle at 58% 42%, rgba(37, 224, 200, 0.16), transparent 64%);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 44px);
  margin-top: clamp(18px, 3vw, 32px);
}

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

.page-about .about-hero__title {
  margin: 14px 0 0;
  font-size: clamp(2.55rem, 11vw, 5.2rem);
  line-height: 0.96;
  letter-spacing: -0.035em;
  font-weight: 800;
}

.page-about .about-hero__title em {
  position: relative;
  font-style: normal;
  color: var(--cyan);
  display: inline-block;
}

.page-about .about-hero__title em::after {
  content: "";
  position: absolute;
  left: -2%;
  right: -2%;
  bottom: -0.02em;
  height: 0.09em;
  background: var(--orange);
  transform: skewX(-18deg);
  opacity: 0.9;
}

.page-about .about-hero__copy .lede {
  margin-top: 20px;
  max-width: 46ch;
}

.page-about .about-keys {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-key {
  display: inline-block;
  padding: 8px 15px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  color: var(--muted);
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease),
    border-color var(--dur) var(--ease), letter-spacing var(--dur) var(--ease),
    transform var(--dur) var(--ease);
}

.page-about .about-key:hover {
  color: var(--ink-900);
  background: var(--cyan);
  border-color: var(--cyan);
  font-weight: 700;
  letter-spacing: 0.17em;
  transform: translateY(-2px);
}

.page-about .about-hero__meta {
  margin-top: 22px;
}

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

@media (min-width: 920px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.04fr) minmax(0, 0.96fr);
    align-items: center;
    gap: 48px;
  }
}

/* ---------- 主张从哪来 ---------- */

.page-about .about-origin__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3.4vw, 40px);
}

.page-about .about-origin__voice {
  padding: clamp(22px, 3.4vw, 34px);
  border-left: 3px solid var(--orange);
  background: linear-gradient(150deg, rgba(255, 106, 43, 0.09), transparent 58%), var(--ink-800);
  display: grid;
  gap: 16px;
  align-content: start;
}

.page-about .about-origin__voice p {
  margin: 0;
  color: var(--fg);
}

.page-about .about-origin__sign {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-about .about-origin__pains {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0;
  align-content: start;
}

.page-about .about-pain {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 16px;
  padding: 20px 0;
  border-top: 1px dashed var(--line);
}

.page-about .about-pain:last-child {
  border-bottom: 1px dashed var(--line);
}

.page-about .about-pain__num {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.12em;
  color: var(--orange);
  padding-top: 3px;
}

.page-about .about-pain__body h3 {
  margin: 0 0 8px;
  font-size: 1.05rem;
  line-height: 1.45;
  font-weight: 700;
  color: var(--fg);
}

.page-about .about-pain__body p {
  margin: 0;
  color: var(--muted);
  font-size: 0.9375rem;
  line-height: 1.7;
}

@media (min-width: 900px) {
  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    gap: 44px;
  }
}

/* ---------- 团队运转 ---------- */

.page-about .about-team__lede {
  max-width: 58ch;
  margin-top: 16px;
}

.page-about .about-team__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3.4vw, 38px);
  margin-top: clamp(24px, 3.6vw, 40px);
}

.page-about .about-roles {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .about-role {
  position: relative;
  padding: 20px 18px 22px;
  background: var(--ink-900);
  border: 1px solid var(--line);
  border-top: 3px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--ab-cut)), calc(100% - var(--ab-cut)) 100%, 0 100%);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-role:hover {
  transform: translateY(-3px);
  border-top-color: var(--cyan);
}

.page-about .about-role__num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  color: var(--muted);
}

.page-about .about-role__name {
  margin: 10px 0 10px;
  font-size: 1.125rem;
  font-weight: 800;
  letter-spacing: 0.01em;
  color: var(--fg);
}

.page-about .about-role__text {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--muted);
}

.page-about .about-role:nth-child(1) { border-top-color: var(--cyan); }
.page-about .about-role:nth-child(1) .about-role__num { color: var(--cyan); }
.page-about .about-role:nth-child(2) { border-top-color: var(--orange); }
.page-about .about-role:nth-child(2) .about-role__num { color: var(--orange); }
.page-about .about-role:nth-child(3) { border-top-color: var(--mint); }
.page-about .about-role:nth-child(3) .about-role__num { color: var(--mint); }

.page-about .about-team__figure {
  margin: 0;
  display: grid;
  gap: 12px;
  align-content: start;
}

.page-about .about-team__figure figcaption {
  display: block;
}

@media (min-width: 700px) {
  .page-about .about-roles {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1020px) {
  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
  }
  .page-about .about-roles {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ---------- 分类树 ---------- */

.page-about .about-taxonomy__lede {
  max-width: 58ch;
  margin-top: 16px;
}

.page-about .about-tree {
  margin-top: clamp(24px, 3.6vw, 40px);
  padding: clamp(16px, 3vw, 28px);
  border: 1px solid var(--line);
  background:
    linear-gradient(180deg, rgba(46, 76, 112, 0.22), transparent 70%),
    var(--ink-800);
  overflow-x: auto;
}

.page-about .about-tree__svg {
  display: block;
  width: 100%;
  min-width: 480px;
  height: auto;
}

.page-about .about-tree__arc {
  fill: none;
  stroke: var(--orange);
  stroke-width: 1.4;
  stroke-dasharray: 5 6;
  opacity: 0.5;
}

.page-about .about-tree__link {
  stroke: var(--line);
  stroke-width: 1.4;
}

.page-about .about-tree__root {
  fill: var(--ink-900);
  stroke: var(--cyan);
  stroke-width: 1.6;
}

.page-about .about-tree__root-text {
  fill: var(--cyan);
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.04em;
}

.page-about .about-tree__leaf {
  fill: var(--ink-900);
  stroke: var(--line);
  stroke-width: 1.2;
}

.page-about .about-tree__leaf-text {
  fill: var(--fg);
  font-family: var(--font-sans);
  font-size: 13px;
  letter-spacing: 0.02em;
}

.page-about .about-fields {
  margin: clamp(22px, 3.4vw, 34px) 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .about-field {
  display: grid;
  gap: 10px;
  padding: 18px 0 20px;
  border-top: 2px solid var(--cyan);
}

.page-about .about-field__key {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--fg);
}

.page-about .about-field__desc {
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--muted);
}

@media (min-width: 640px) {
  .page-about .about-fields {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px 28px;
  }
}

@media (min-width: 1020px) {
  .page-about .about-fields {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 赛季时间轴 ---------- */

.page-about .about-stages__lede {
  max-width: 52ch;
  margin-top: 16px;
}

.page-about .about-stages__track {
  display: flex;
  gap: 12px;
  margin-top: clamp(22px, 3.4vw, 34px);
  padding: 4px 2px 16px;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-about .about-stage-node {
  flex: 0 0 auto;
  min-width: 176px;
  scroll-snap-align: start;
  display: grid;
  gap: 8px;
  padding: 15px 17px 17px;
  text-decoration: none;
  color: inherit;
  border: 1px solid var(--line);
  background: linear-gradient(155deg, rgba(37, 224, 200, 0.1), transparent 62%), var(--ink-900);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--ab-cut)), calc(100% - var(--ab-cut)) 100%, 0 100%);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease),
    background-color var(--dur) var(--ease);
}

.page-about .about-stage-node:hover,
.page-about .about-stage-node:focus-visible {
  border-color: var(--cyan);
  transform: translateY(-3px);
}

.page-about .about-stage-node__num {
  font-family: var(--font-mono);
  font-size: 1.375rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--orange);
}

.page-about .about-stage-node__label {
  font-size: 0.875rem;
  line-height: 1.55;
  color: var(--fg);
}

.page-about .about-stages__list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .about-stage {
  padding: clamp(20px, 3vw, 30px);
  border: 1px solid var(--line);
  border-left: 3px solid var(--line);
  background: var(--ink-900);
  scroll-margin-top: calc(var(--bar-h) + 28px);
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .about-stage:target {
  border-left-color: var(--cyan);
  border-color: rgba(37, 224, 200, 0.5);
  background: linear-gradient(120deg, rgba(37, 224, 200, 0.12), transparent 58%), var(--ink-900);
}

.page-about .about-stage__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  color: var(--muted);
}

.page-about .about-stage__title {
  margin: 12px 0 12px;
  font-size: clamp(1.15rem, 2.4vw, 1.45rem);
  font-weight: 800;
  line-height: 1.35;
  letter-spacing: -0.01em;
  color: var(--fg);
}

.page-about .about-stage__text {
  margin: 0;
  color: var(--muted);
  font-size: 0.9375rem;
  line-height: 1.75;
}

.page-about .about-stage__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-stage__tags li {
  padding: 5px 11px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

@media (min-width: 860px) {
  .page-about .about-stages__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
  }
}

/* ---------- 本地覆盖 ---------- */

.page-about .about-coverage__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3.6vw, 42px);
  align-items: start;
}

.page-about .about-coverage__copy h2 {
  margin-bottom: 18px;
}

.page-about .about-coverage__copy p {
  color: var(--muted);
  font-size: 0.9375rem;
  line-height: 1.8;
  max-width: 52ch;
}

.page-about .about-coverage__copy p + p {
  margin-top: 14px;
}

.page-about .about-coverage__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-coverage__figure {
  margin: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 20px;
  margin: clamp(30px, 4.4vw, 48px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-fact {
  padding: 18px 16px 20px;
  background: var(--ink-800);
  border-left: 3px solid var(--cyan);
}

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

.page-about .about-fact__value {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.4rem, 4vw, 1.9rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--fg);
}

.page-about .about-fact__label {
  display: block;
  margin-top: 8px;
  font-size: 0.8125rem;
  letter-spacing: 0.02em;
  color: var(--muted);
}

@media (min-width: 900px) {
  .page-about .about-coverage__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    gap: 46px;
  }
}

@media (min-width: 1020px) {
  .page-about .about-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 收尾 ---------- */

.page-about .about-next__panel {
  padding: clamp(24px, 4vw, 44px);
  background:
    linear-gradient(120deg, rgba(255, 106, 43, 0.14), transparent 52%),
    linear-gradient(300deg, rgba(37, 224, 200, 0.12), transparent 46%),
    var(--ink-800);
  border: 1px solid var(--line);
  display: grid;
  gap: 16px;
}

.page-about .about-next__title {
  margin: 0;
  font-size: clamp(1.5rem, 4.4vw, 2.4rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.15;
  color: var(--fg);
}

.page-about .about-next__text {
  margin: 0;
  max-width: 62ch;
  color: var(--muted);
  font-size: 0.9375rem;
  line-height: 1.8;
}

.page-about .about-next__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 6px;
}

@media (max-width: 420px) {
  .page-about .about-keys {
    gap: 8px;
  }
  .page-about .about-key {
    font-size: 0.75rem;
    padding: 7px 12px;
  }
  .page-about .about-facts {
    grid-template-columns: minmax(0, 1fr);
  }
  .page-about .about-next__links .btn {
    width: 100%;
    text-align: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-key,
  .page-about .about-role,
  .page-about .about-stage-node,
  .page-about .about-stage {
    transition: none;
  }
  .page-about .about-key:hover,
  .page-about .about-role:hover,
  .page-about .about-stage-node:hover {
    transform: none;
  }
}
<<<END>>>
仓库根目录：/home/user/leyuapp
已逐项确认：分类树 SVG 的 `about-tree__arc` 用 `<path>` 而非 `<line>`，属性齐全；`data-reveal` 及 `data-reveal-delay` 均为站内已实现协议；`<a href="#stage-1">` 等锚点均有对应 `id="stage-1"` 元素；页脚下载入口、备案号、客服邮箱、联系电话和地址均严格沿用全站共享原文。可直接提交。