.page-about {
  --about-line-soft: rgba(167, 180, 214, 0.14);
  --about-line-strong: rgba(167, 180, 214, 0.28);
  --about-cyan-soft: rgba(77, 240, 224, 0.14);
  --about-ember-soft: rgba(255, 90, 31, 0.16);
  position: relative;
  overflow-x: hidden;
  padding-bottom: clamp(36px, 6vw, 88px);
  background:
    radial-gradient(880px 520px at 84% -6%, rgba(255, 90, 31, 0.12), transparent 60%),
    radial-gradient(700px 460px at 2% 6%, rgba(77, 240, 224, 0.08), transparent 62%),
    var(--night);
  color: var(--ice);
  font-family: var(--font-body);
}

.page-about a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.18s ease, color 0.18s ease;
}

.page-about a:hover {
  border-bottom-color: currentColor;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding-block: clamp(22px, 4vw, 40px) clamp(24px, 4vw, 44px);
  border-bottom: 1px solid var(--about-line-soft);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -34%;
  right: -12%;
  width: min(620px, 78%);
  height: 420px;
  background: conic-gradient(from 210deg at 60% 40%, rgba(255, 90, 31, 0.24), rgba(77, 240, 224, 0.1), transparent 68%);
  filter: blur(8px);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-hero .shell {
  position: relative;
  z-index: 1;
}

.page-about .about-hero .eyebrow {
  display: inline-block;
  margin: clamp(18px, 3vw, 28px) 0 0;
  color: var(--gold);
  font-size: 11px;
  letter-spacing: 0.18em;
}

.page-about .about-hero h1 {
  margin: 0.4em 0 0.42em;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2.1rem, 6.4vw, 4rem);
  line-height: 1.07;
  letter-spacing: -0.02em;
  max-width: 18ch;
}

.page-about .about-hero__lead {
  margin: 0 0 clamp(20px, 3vw, 30px);
  max-width: 62ch;
  color: var(--mist);
  font-size: clamp(0.95rem, 2.2vw, 1.06rem);
  line-height: 1.8;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-stat {
  padding: 12px 14px;
  border: 1px solid var(--about-line-soft);
  border-radius: var(--r-md);
  background: linear-gradient(158deg, rgba(17, 26, 58, 0.92), rgba(11, 16, 38, 0.5));
}

.page-about .about-stat__num {
  display: block;
  font-family: var(--font-score);
  font-weight: 800;
  font-size: clamp(1.5rem, 4vw, 2.1rem);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--cyan);
}

.page-about .about-stat__unit {
  margin-left: 2px;
  font-size: 0.62em;
  color: var(--mist);
}

.page-about .about-stat__label {
  display: block;
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--mist);
}

/* ---------- 布局与索引 ---------- */
.page-about .about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 4vw, 52px);
  padding-block: clamp(22px, 4vw, 52px);
}

.page-about .about-index {
  position: sticky;
  top: 8px;
  z-index: 5;
  padding: 10px;
  border: 1px solid var(--about-line-soft);
  border-radius: var(--r-md);
  background: rgba(11, 16, 38, 0.82);
  backdrop-filter: blur(10px);
}

.page-about .about-index__label {
  display: none;
  margin: 0 0 10px;
  padding-left: 4px;
  font-size: 10px;
  letter-spacing: 0.22em;
  color: var(--mist);
}

.page-about .about-index__list {
  display: flex;
  gap: 6px;
  margin: 0;
  padding: 0 0 2px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-about .about-index__list::-webkit-scrollbar {
  display: none;
}

.page-about .about-index__link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 7px 12px;
  border: 1px solid transparent;
  border-radius: var(--r-pill);
  color: var(--mist);
  font-size: 0.82rem;
  white-space: nowrap;
  transition: color 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}

.page-about .about-index__link .side-index__num {
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.page-about .about-index__link:hover,
.page-about .about-index__link[aria-current="true"] {
  color: var(--ice);
  border-color: rgba(255, 90, 31, 0.5);
  background: var(--about-ember-soft);
  border-bottom-color: rgba(255, 90, 31, 0.5);
}

/* ---------- 章节 ---------- */
.page-about .about-body {
  min-width: 0;
}

.page-about .about-chapter {
  padding-block: clamp(24px, 4vw, 44px);
  border-top: 1px solid var(--about-line-soft);
  scroll-margin-top: clamp(76px, 12vw, 112px);
}

.page-about .about-chapter:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-about .about-chapter__head {
  display: grid;
  gap: 8px;
  margin-bottom: clamp(14px, 2.4vw, 22px);
}

.page-about .about-chapter__no {
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--gold);
}

.page-about .about-chapter__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.35rem, 4.4vw, 2rem);
  line-height: 1.22;
  letter-spacing: -0.01em;
}

.page-about .about-chapter__lead {
  margin: 0 0 clamp(16px, 2.6vw, 26px);
  max-width: 60ch;
  color: var(--mist);
  font-size: 0.95rem;
  line-height: 1.85;
}

.page-about .about-figure {
  margin: clamp(18px, 3vw, 30px) 0 0;
  overflow: hidden;
  border-radius: var(--r-lg);
}

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

/* ---------- 版本路线 ---------- */
.page-about .about-timeline {
  position: relative;
  margin: 0;
  padding: 0 0 0 26px;
  list-style: none;
  display: grid;
  gap: 12px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--line) 0%, var(--ember) 46%, var(--cyan) 100%);
}

.page-about .about-node {
  position: relative;
}

.page-about .about-node::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 16px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--night);
  border: 2px solid var(--cyan);
  transition: background 0.2s ease, box-shadow 0.2s ease;
}

.page-about .about-node:hover::before {
  background: var(--cyan);
  box-shadow: 0 0 0 5px var(--about-cyan-soft);
}

.page-about .about-node__card {
  padding: 14px 16px;
  border: 1px solid var(--about-line-soft);
  border-radius: var(--r-md);
  background: linear-gradient(150deg, rgba(17, 26, 58, 0.88), rgba(11, 16, 38, 0.6));
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.page-about .about-node:hover .about-node__card {
  border-color: rgba(77, 240, 224, 0.45);
  transform: translateY(-2px);
}

.page-about .about-node__year {
  display: block;
  font-family: var(--font-score);
  font-weight: 800;
  font-size: 1.45rem;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--cyan);
}

.page-about .about-node__title {
  margin: 6px 0 0;
  font-size: 1rem;
  font-weight: 700;
}

.page-about .about-node__note {
  margin: 6px 0 0;
  color: var(--mist);
  font-size: 0.88rem;
  line-height: 1.75;
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-about .about-team__card {
  padding: 16px;
  border: 1px solid var(--about-line-soft);
  border-radius: var(--r-md);
  background: linear-gradient(160deg, rgba(17, 26, 58, 0.9), rgba(11, 16, 38, 0.55));
  transition: border-color 0.2s ease;
}

.page-about .about-team__card:hover {
  border-color: rgba(245, 184, 75, 0.42);
}

.page-about .about-team__num {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--gold);
}

.page-about .about-team__role {
  margin: 6px 0 6px;
  font-size: 1.02rem;
  font-weight: 700;
}

.page-about .about-team__desc {
  margin: 0;
  color: var(--mist);
  font-size: 0.87rem;
  line-height: 1.75;
}

.page-about .about-shift {
  display: grid;
  gap: 8px;
  margin-top: clamp(16px, 2.6vw, 24px);
  padding: 14px 16px;
  border-left: 3px solid var(--ember);
  border-radius: 0 var(--r-md) var(--r-md) 0;
  background: linear-gradient(90deg, var(--about-ember-soft), transparent 82%);
}

.page-about .about-shift__key {
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--ember);
}

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

/* ---------- 本地合作 ---------- */
.page-about .about-cities {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 clamp(16px, 2.6vw, 24px);
  padding: 0;
  list-style: none;
}

.page-about .about-city {
  padding: 7px 15px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  background: rgba(27, 42, 82, 0.52);
  color: var(--ice);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  transition: border-color 0.18s ease, background 0.18s ease;
}

.page-about .about-city:hover {
  border-color: rgba(77, 240, 224, 0.55);
  background: var(--about-cyan-soft);
}

.page-about .about-city--more {
  border-style: dashed;
  color: var(--mist);
  letter-spacing: 0.06em;
}

.page-about .about-partner {
  padding: clamp(16px, 2.6vw, 22px);
  border: 1px solid var(--about-line-soft);
  border-radius: var(--r-lg);
  background: linear-gradient(140deg, rgba(27, 42, 82, 0.55), rgba(11, 16, 38, 0.45));
}

.page-about .about-partner__title {
  margin: 0 0 10px;
  font-size: 1rem;
  font-weight: 700;
  color: var(--ice);
}

.page-about .about-partner__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 9px;
  counter-reset: partner;
}

.page-about .about-partner__list li {
  position: relative;
  padding-left: 26px;
  color: var(--mist);
  font-size: 0.9rem;
  line-height: 1.75;
  counter-increment: partner;
}

.page-about .about-partner__list li::before {
  content: "0" counter(partner);
  position: absolute;
  left: 0;
  top: 2px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--gold);
}

.page-about .about-partner__note {
  margin: 14px 0 0;
  color: var(--mist);
  font-size: 0.87rem;
  line-height: 1.8;
  max-width: 64ch;
}

/* ---------- 更新节奏 ---------- */
.page-about .about-cadence {
  display: grid;
  gap: 0;
  margin: 0 0 clamp(18px, 3vw, 26px);
  border-top: 1px solid var(--about-line-soft);
}

.page-about .about-cadence__row {
  display: grid;
  gap: 6px;
  padding: 13px 0;
  border-bottom: 1px solid var(--about-line-soft);
}

.page-about .about-cadence__key {
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

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

.page-about .about-cadence__val a {
  border-bottom: 1px solid rgba(77, 240, 224, 0.4);
}

.page-about .about-meter {
  padding: clamp(16px, 2.6vw, 22px);
  border: 1px solid var(--about-line-soft);
  border-radius: var(--r-lg);
  background: rgba(17, 26, 58, 0.6);
}

.page-about .about-meter__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}

.page-about .about-meter__label {
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--mist);
}

.page-about .about-meter__value {
  font-family: var(--font-score);
  font-weight: 800;
  font-size: 1.5rem;
  letter-spacing: 0.02em;
  color: var(--cyan);
}

.page-about .about-meter__track {
  height: 8px;
  border-radius: var(--r-pill);
  background: rgba(27, 42, 82, 0.92);
  overflow: hidden;
}

.page-about .about-meter__fill {
  display: block;
  width: 78%;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--ember), var(--cyan));
}

.page-about .about-meter__note {
  margin: 12px 0 0;
  color: var(--mist);
  font-size: 0.85rem;
  line-height: 1.75;
}

.page-about .about-figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: clamp(14px, 2.4vw, 22px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-figures li {
  padding: 12px 14px;
  border: 1px solid var(--about-line-soft);
  border-radius: var(--r-sm);
  background: rgba(11, 16, 38, 0.55);
}

.page-about .about-figures__num {
  display: block;
  font-family: var(--font-score);
  font-weight: 800;
  font-size: 1.25rem;
  line-height: 1.1;
  letter-spacing: 0.02em;
  color: var(--ice);
}

.page-about .about-figures__unit {
  font-size: 0.66em;
  color: var(--mist);
}

.page-about .about-figures__label {
  display: block;
  margin-top: 6px;
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--mist);
}

/* ---------- 视觉理念 ---------- */
.page-about .about-swatches {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-swatch {
  display: grid;
  gap: 6px;
  padding: 12px;
  border: 1px solid var(--about-line-soft);
  border-radius: var(--r-md);
  background: rgba(17, 26, 58, 0.55);
}

.page-about .about-swatch__chip {
  display: block;
  height: 34px;
  border-radius: var(--r-sm);
}

.page-about .about-swatch--night .about-swatch__chip {
  background: var(--night);
  border: 1px solid var(--line);
}

.page-about .about-swatch--ember .about-swatch__chip {
  background: var(--ember);
}

.page-about .about-swatch--cyan .about-swatch__chip {
  background: var(--cyan);
}

.page-about .about-swatch--gold .about-swatch__chip {
  background: var(--gold);
}

.page-about .about-swatch__name {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--ice);
}

.page-about .about-swatch__hex {
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--mist);
}

.page-about .about-swatch__use {
  font-size: 0.8rem;
  line-height: 1.6;
  color: var(--mist);
}

.page-about .about-vision__note {
  margin: clamp(16px, 2.6vw, 24px) 0 0;
  max-width: 62ch;
  color: var(--mist);
  font-size: 0.9rem;
  line-height: 1.85;
}

/* ---------- 行业参与 ---------- */
.page-about .about-marks {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-mark {
  display: grid;
  gap: 6px;
  padding: 14px 16px;
  border: 1px solid var(--about-line-soft);
  border-radius: var(--r-md);
  background: linear-gradient(140deg, rgba(27, 42, 82, 0.5), rgba(11, 16, 38, 0.45));
}

.page-about .about-mark__tag {
  font-size: 10px;
  letter-spacing: 0.22em;
  color: var(--gold);
}

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

.page-about .about-next {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  margin-top: clamp(18px, 3vw, 28px);
}

.page-about .about-next__item {
  display: grid;
  gap: 6px;
  padding: 16px 18px;
  border: 1px solid var(--about-line-strong);
  border-radius: var(--r-pill);
  background: rgba(11, 16, 38, 0.7);
  color: var(--ice);
  transition: border-color 0.2s ease, background 0.2s ease, transform 0.2s ease;
}

.page-about .about-next__item:hover {
  border-color: var(--ember);
  border-bottom-color: var(--ember);
  background: var(--about-ember-soft);
  transform: translateY(-2px);
}

.page-about .about-next__key {
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--cyan);
}

.page-about .about-next__title {
  font-size: 0.95rem;
  font-weight: 700;
  line-height: 1.55;
}

/* ---------- 响应式 ---------- */
@media (min-width: 600px) {
  .page-about .about-team {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-cadence__row {
    grid-template-columns: 130px minmax(0, 1fr);
    align-items: baseline;
    gap: 16px;
  }

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

  .page-about .about-next__item {
    border-radius: var(--r-lg);
  }
}

@media (min-width: 720px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

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

@media (min-width: 920px) {
  .page-about .about-layout {
    grid-template-columns: minmax(150px, 196px) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-index {
    position: sticky;
    top: 100px;
    padding: 14px;
    background: rgba(11, 16, 38, 0.66);
  }

  .page-about .about-index__label {
    display: block;
  }

  .page-about .about-index__list {
    display: grid;
    gap: 3px;
    overflow: visible;
  }

  .page-about .about-index__link {
    border-radius: var(--r-sm);
    border-left: 2px solid transparent;
    border-top-color: transparent;
    border-right-color: transparent;
    border-bottom-color: transparent;
    padding: 9px 10px;
  }

  .page-about .about-index__link:hover,
  .page-about .about-index__link[aria-current="true"] {
    border-color: transparent;
    border-left-color: var(--ember);
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about * {
    transition-duration: 0.001ms !important;
  }
}
<<<END>>>