.page-about {
  --about-gap: clamp(22px, 2.8vw, 36px);
  --about-card: var(--ink-800);
  color: var(--paper);
  font-family: var(--font-body);
}

.page-about .about-hero {
  display: grid;
  gap: 30px;
  padding: 6px 0 42px;
}

.page-about .about-hero__title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(2.3rem, 7.6vw, 4.9rem);
  line-height: 1.02;
  letter-spacing: -0.03em;
  color: var(--paper);
  max-width: 16ch;
}

.page-about .about-hero__em {
  color: var(--cyan);
}

.page-about .about-hero__lede {
  margin: 20px 0 0;
  max-width: 48ch;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 26px 0 0;
  padding: 1px;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-fact {
  display: grid;
  gap: 4px;
  padding: 13px 14px;
  background: var(--ink-800);
}

.page-about .about-fact__num {
  font-family: var(--font-mono);
  font-size: 1.32rem;
  line-height: 1;
  color: var(--cyan);
  letter-spacing: 0.02em;
}

.page-about .about-fact__label {
  font-size: 0.74rem;
  line-height: 1.4;
  color: var(--mist);
  letter-spacing: 0.04em;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 24px 0 0;
}

.page-about .about-figure {
  margin: 22px 0 0;
  border: 1px solid var(--line);
  background: var(--panel);
  overflow: hidden;
}

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

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  filter: saturate(0.82) brightness(0.94);
}

.page-about .about-figure figcaption {
  padding: 10px 14px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  line-height: 1.6;
  letter-spacing: 0.03em;
  color: var(--mist);
}

/* ---------- 分屏骨架 ---------- */
.page-about .about-shell {
  display: grid;
  gap: var(--about-gap);
  padding: 30px 0 60px;
  border-top: 1px solid var(--line);
}

.page-about .about-main {
  display: grid;
  gap: 46px;
  min-width: 0;
}

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

.page-about .about-block__title {
  margin: 0 0 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(1.6rem, 4.4vw, 2.4rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .about-block__text p {
  margin: 0 0 14px;
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--mist);
}

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

.page-about .about-block__lead {
  font-size: 1.02rem !important;
  line-height: 1.8 !important;
  color: var(--paper) !important;
}

/* ---------- 四道流程 ---------- */
.page-about .about-flow__svg {
  display: block;
  width: 100%;
  height: auto;
  margin: 24px 0 14px;
}

.page-about .about-flow__svg line {
  stroke: var(--line);
  stroke-width: 1;
}

.page-about .about-flow__svg circle {
  fill: var(--ink-900);
  stroke: var(--cyan);
  stroke-width: 1.5;
}

.page-about .about-flow__steps {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-flow__step {
  background: var(--ink-800);
  border: 1px solid var(--line);
  transition: border-color var(--t), background var(--t), transform var(--t);
}

.page-about .about-flow__step:hover,
.page-about .about-flow__step:focus-within {
  border-color: var(--cyan-soft);
  background: var(--panel);
  transform: translateX(2px);
}

.page-about .about-flow__step:target {
  border-color: var(--cyan);
  background: var(--panel);
  box-shadow: inset 0 0 0 1px var(--cyan);
}

.page-about .about-flow__link {
  display: block;
  padding: 14px 15px 15px;
  text-decoration: none;
  color: inherit;
}

.page-about .about-flow__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--cyan);
  margin-bottom: 8px;
}

.page-about .about-flow__name {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.12rem;
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-flow__desc {
  margin: 0;
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 六个方向 ---------- */
.page-about .about-lanes {
  margin-top: 20px;
}

.page-about .about-lanes__tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
}

.page-about .about-lanes__tab {
  display: inline-block;
  padding: 8px 13px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--mist);
  text-decoration: none;
  background: var(--ink-800);
  border: 1px solid var(--line);
  transition: color var(--t), border-color var(--t), background var(--t);
}

.page-about .about-lanes__tab:hover,
.page-about .about-lanes__tab:focus-visible {
  color: var(--paper);
  border-color: var(--cyan-soft);
}

.page-about .about-lanes__panel {
  display: none;
  margin-top: 20px;
  padding: 4px 0 4px 16px;
  border-left: 2px solid var(--cyan);
}

.page-about .about-lanes__panel:first-of-type {
  display: block;
}

.page-about .about-lanes:has(.about-lanes__panel:target) .about-lanes__panel {
  display: none;
}

.page-about .about-lanes__panel:target {
  display: block;
}

.page-about .about-lanes:has(#lane-nearby:target) .about-lanes__tab[href="#lane-nearby"],
.page-about .about-lanes:has(#lane-h2h:target) .about-lanes__tab[href="#lane-h2h"],
.page-about .about-lanes:has(#lane-report:target) .about-lanes__tab[href="#lane-report"],
.page-about .about-lanes:has(#lane-column:target) .about-lanes__tab[href="#lane-column"],
.page-about .about-lanes:has(#lane-index:target) .about-lanes__tab[href="#lane-index"],
.page-about .about-lanes:has(#lane-help:target) .about-lanes__tab[href="#lane-help"] {
  color: var(--ink-900);
  background: var(--cyan);
  border-color: var(--cyan);
}

.page-about .about-lanes__panel-title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.22rem;
  line-height: 1.28;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-lanes__panel-text {
  margin: 0 0 12px;
  max-width: 58ch;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-lanes__link {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.04em;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  padding-bottom: 2px;
  margin-right: 16px;
  transition: color var(--t), border-color var(--t);
}

.page-about .about-lanes__link:hover,
.page-about .about-lanes__link:focus-visible {
  color: var(--cyan-soft);
  border-color: var(--cyan-soft);
}

.page-about .about-lanes__panel--h2h { border-left-color: var(--violet); }
.page-about .about-lanes__panel--report { border-left-color: var(--orange); }
.page-about .about-lanes__panel--column { border-left-color: var(--cyan-soft); }
.page-about .about-lanes__panel--index { border-left-color: var(--cyan); }
.page-about .about-lanes__panel--help { border-left-color: var(--mist); }

/* ---------- 更新节奏 ---------- */
.page-about .about-rhythm {
  display: grid;
  gap: 8px;
}

.page-about .about-rhythm__text p {
  margin: 0 0 14px;
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-rhythm__list {
  display: grid;
  gap: 9px;
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-rhythm__list li {
  position: relative;
  padding-left: 20px;
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--paper);
}

.page-about .about-rhythm__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.75em;
  width: 10px;
  height: 1px;
  background: var(--orange);
}

.page-about .about-rhythm__figure {
  margin: 8px 0 0;
}

/* ---------- 发展历程 ---------- */
.page-about .about-tl {
  display: grid;
  gap: 14px;
  margin-top: 20px;
}

.page-about .about-tl__item {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 12px;
  padding: 16px 14px 16px 14px;
  border: 1px solid var(--line);
  border-left: 2px solid var(--line);
  background: var(--ink-800);
  outline: none;
  transition: border-color var(--t), background var(--t);
}

.page-about .about-tl__item:hover,
.page-about .about-tl__item:focus-visible {
  border-color: var(--cyan-soft);
  border-left-color: var(--cyan);
  background: var(--panel);
}

.page-about .about-tl__num {
  font-family: var(--font-mono);
  font-size: 0.92rem;
  letter-spacing: 0.06em;
  color: var(--cyan);
  padding-top: 2px;
}

.page-about .about-tl__title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.2rem;
  line-height: 1.28;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-tl__text {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.78;
  color: var(--mist);
}

.page-about .about-tl__more {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  margin-top: 0;
  transition: max-height var(--t-slow), opacity var(--t), margin-top var(--t);
}

.page-about .about-tl__item:hover .about-tl__more,
.page-about .about-tl__item:focus-within .about-tl__more,
.page-about .about-tl__item:focus .about-tl__more {
  max-height: 9rem;
  opacity: 1;
  margin-top: 10px;
}

.page-about .about-tl__more p {
  margin: 0;
  padding-top: 10px;
  border-top: 1px dashed var(--line);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  line-height: 1.7;
  color: var(--cyan-soft);
}

/* ---------- 编辑原则 ---------- */
.page-about .about-rules {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-rules__item {
  padding: 16px;
  border: 1px solid var(--line);
  background: var(--panel);
}

.page-about .about-rules__name {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  color: var(--orange);
}

.page-about .about-rules__text {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.78;
  color: var(--mist);
}

.page-about .about-feedback {
  margin-top: 22px;
  padding: 18px 16px;
  border: 1px solid var(--line);
  border-left: 2px solid var(--cyan);
  background: var(--ink-800);
}

.page-about .about-feedback__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.16rem;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-feedback__text {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-feedback__links {
  margin: 14px 0 0;
}

/* ---------- 侧栏 ---------- */
.page-about .about-rail {
  display: grid;
  gap: 22px;
  min-width: 0;
}

.page-about .about-rail__title {
  margin: 0 0 10px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  color: var(--mist);
}

.page-about .about-rail__nav {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}

.page-about .about-rail__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 7px 11px;
  font-size: 0.84rem;
  color: var(--mist);
  text-decoration: none;
  border: 1px solid var(--line);
  background: var(--ink-800);
  transition: color var(--t), border-color var(--t), background var(--t);
}

.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible {
  color: var(--paper);
  border-color: var(--cyan-soft);
  background: var(--panel);
}

.page-about .about-rail__num {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--cyan);
  letter-spacing: 0.08em;
}

.page-about .about-rail__quote {
  margin: 0 0 10px;
  padding-left: 14px;
  border-left: 2px solid var(--orange);
  font-family: var(--font-display);
  font-size: 1.16rem;
  line-height: 1.5;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-rail__note {
  margin: 0;
  font-size: 0.8rem;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .about-rail__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 14px 0 0;
}

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

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

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

@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.85fr);
    align-items: start;
    gap: 44px;
  }

  .page-about .about-hero__media {
    margin-top: 34px;
  }

  .page-about .about-rhythm {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.9fr);
    gap: 30px;
    align-items: start;
  }

  .page-about .about-rhythm__figure {
    margin-top: 4px;
  }

  .page-about .about-tl__item {
    grid-template-columns: 46px minmax(0, 1fr);
    padding: 18px 20px;
  }
}

@media (min-width: 1000px) {
  .page-about .about-shell {
    grid-template-columns: minmax(0, 1fr) 272px;
    align-items: start;
    gap: 46px;
  }

  .page-about .about-rail {
    position: sticky;
    top: 24px;
  }

  .page-about .about-rail__nav {
    display: grid;
    gap: 2px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-flow__step,
  .page-about .about-tl__item,
  .page-about .about-tl__more,
  .page-about .about-lanes__tab,
  .page-about .about-rail__link {
    transition: none;
  }

  .page-about .about-flow__step:hover {
    transform: none;
  }
}
<<<END>>>