.page-about {
  --about-maxw: 38rem;
  --about-dark-fg: rgba(248, 251, 255, .82);
  --about-dark-line: rgba(53, 224, 206, .28);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  color: var(--paper);
  padding: clamp(26px, 5vw, 60px) 0 clamp(44px, 7vw, 96px);
  border-radius: 0 0 clamp(36px, 6vw, 72px) clamp(36px, 6vw, 72px);
  background:
    radial-gradient(110% 80% at 86% 6%, rgba(53, 224, 206, .20), transparent 58%),
    radial-gradient(90% 75% at 6% 96%, rgba(255, 106, 43, .30), transparent 62%),
    linear-gradient(163deg, var(--ink-900) 0%, var(--ink-700) 54%, var(--ink-500) 100%);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: auto -12% -34% 42%;
  height: 60%;
  border-radius: 50%;
  background: radial-gradient(closest-side, rgba(53, 224, 206, .22), transparent 72%);
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  align-items: center;
}

.page-about .about-crumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  font-size: 13px;
  color: rgba(248, 251, 255, .68);
  font-family: var(--font-mono);
}

.page-about .about-crumb a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid var(--line-cyan);
  padding-bottom: 1px;
}

.page-about .about-crumb a:hover {
  color: var(--cyan-400);
}

.page-about .about-hero__eyebrow {
  margin-top: 18px;
  color: var(--cyan-400);
}

.page-about .about-hero__title {
  margin: 12px 0 0;
  font-size: clamp(32px, 7vw, 66px);
  line-height: 1.1;
  letter-spacing: -.02em;
  transform: rotate(-2deg);
  transform-origin: left center;
}

.page-about .about-hero__title em {
  font-style: normal;
  color: var(--orange-500);
  text-shadow: 0 12px 32px rgba(255, 106, 43, .35);
}

.page-about .about-hero__lead {
  max-width: 30rem;
  margin: 22px 0 0;
  color: var(--about-dark-fg);
  font-size: 17px;
  line-height: 1.85;
}

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

.page-about .about-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  margin: 30px 0 0;
  padding: 18px 0 0;
  list-style: none;
  border-top: 1px solid rgba(53, 224, 206, .24);
  font-size: 13px;
  color: rgba(248, 251, 255, .72);
}

.page-about .about-hero__stats .mono {
  display: inline-block;
  margin-right: 4px;
  font-size: 22px;
  color: var(--cyan-400);
}

.page-about .about-hero__unit {
  font-size: 14px;
}

.page-about .about-hero__media {
  width: 100%;
  margin: 0;
  aspect-ratio: 4 / 5;
  border-radius: clamp(24px, 4vw, 48px) 4px clamp(24px, 4vw, 48px) clamp(24px, 4vw, 48px);
  overflow: hidden;
  box-shadow: 0 30px 70px -40px rgba(5, 25, 43, .9);
}

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

@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .8fr);
    gap: clamp(32px, 5vw, 64px);
  }
}

/* ---------- 侧轨 + 主体骨架 ---------- */
.page-about .about-wrap {
  padding-block: clamp(36px, 5vw, 76px);
}

.page-about .about-rail {
  display: none;
}

.page-about .about-rail__mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 14px;
  background: linear-gradient(145deg, var(--ink-700), var(--ink-500));
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: .06em;
}

.page-about .about-rail__cap {
  margin: 18px 0 10px;
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--muted);
}

.page-about .about-rail__map {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.page-about .about-rail__link {
  display: flex;
  gap: 10px;
  align-items: baseline;
  padding: 8px 10px 8px 12px;
  border-left: 2px solid var(--line);
  font-size: 14px;
  color: var(--slate-600);
  text-decoration: none;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .about-rail__link .mono {
  font-size: 11px;
  color: var(--ink-500);
  letter-spacing: .06em;
}

.page-about .about-rail__link:hover,
.page-about .about-rail__link[aria-current="true"] {
  color: var(--ink-700);
  border-left-color: var(--orange-500);
  background: rgba(53, 224, 206, .1);
}

.page-about .about-rail__link[aria-current="true"] .mono {
  color: var(--orange-500);
}

.page-about .about-rail__progress {
  height: 3px;
  margin: 22px 0 12px;
  border-radius: 3px;
  background: var(--line-soft);
  overflow: hidden;
}

.page-about .about-rail__progress span {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--cyan-400), var(--orange-500));
  transition: width var(--dur) var(--ease);
}

.page-about .about-rail__ver {
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--ink-500);
}

@media (min-width: 980px) {
  .page-about .about-wrap {
    display: grid;
    grid-template-columns: var(--rail) minmax(0, 1fr);
    gap: clamp(28px, 4vw, 60px);
    align-items: start;
  }

  .page-about .about-rail {
    display: block;
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }
}

/* ---------- 章节通用 ---------- */
.page-about .about-body {
  display: grid;
  gap: clamp(36px, 5vw, 76px);
  min-width: 0;
}

.page-about .about-sec {
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-about .about-sec__index {
  color: var(--orange-500);
  letter-spacing: .14em;
  margin: 0 0 10px;
}

.page-about .about-h2 {
  margin: 0 0 18px;
  font-size: clamp(24px, 3.6vw, 40px);
  line-height: 1.24;
  letter-spacing: -.01em;
  font-weight: 700;
  color: var(--ink-700);
}

.page-about .about-sub {
  max-width: var(--about-maxw);
  margin: 0 0 26px;
  color: var(--slate-600);
  font-size: 16px;
  line-height: 1.8;
}

.page-about .about-prose {
  max-width: var(--about-maxw);
  font-size: 17px;
  line-height: 1.85;
  color: var(--fg);
}

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

.page-about .about-panel {
  padding: clamp(24px, 4vw, 48px);
  border-radius: var(--radius-lg);
  background: var(--mist);
}

.page-about .about-panel--deep {
  position: relative;
  overflow: hidden;
  color: var(--paper);
  background:
    radial-gradient(90% 70% at 10% 0%, rgba(53, 224, 206, .18), transparent 60%),
    linear-gradient(155deg, var(--ink-900), var(--ink-700));
  border-radius: var(--radius-xl) var(--radius-xs) var(--radius-xl) var(--radius-xl);
}

.page-about .about-panel--deep::after {
  content: "";
  position: absolute;
  inset: -20% -10% auto auto;
  width: 340px;
  height: 340px;
  border-radius: 46% 54% 38% 62%;
  background: radial-gradient(closest-side, rgba(255, 106, 43, .22), transparent 70%);
  pointer-events: none;
}

.page-about .about-panel--deep > * {
  position: relative;
  z-index: 1;
}

.page-about .about-panel--deep .about-h2,
.page-about .about-panel--deep h3 {
  color: var(--paper);
}

.page-about .about-panel--deep .about-prose,
.page-about .about-panel--deep p {
  color: var(--about-dark-fg);
}

.page-about .about-panel--deep .about-sec__index {
  color: var(--cyan-400);
}

/* ---------- 引用块 ---------- */
.page-about .about-quote {
  max-width: var(--about-maxw);
  margin: 28px 0 0;
  padding: clamp(22px, 3vw, 32px) clamp(24px, 4vw, 44px);
  border-left: 6px solid var(--orange-500);
  border-radius: 4px var(--radius-xl) var(--radius-xl) 4px;
  background: linear-gradient(120deg, rgba(255, 199, 168, .38), rgba(230, 242, 245, .8));
}

.page-about .about-quote p {
  margin: 0;
  font-size: clamp(19px, 2.4vw, 24px);
  line-height: 1.6;
  font-weight: 700;
  color: var(--ink-700);
}

.page-about .about-quote cite {
  display: block;
  margin-top: 12px;
  font-style: normal;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--slate-600);
}

/* ---------- 三条内容线 ---------- */
.page-about .about-lines {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-line {
  display: grid;
  gap: 10px;
  padding: 24px 0;
  border-top: 1px solid var(--line);
}

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

.page-about .about-line__num {
  font-size: 30px;
  line-height: 1;
  color: var(--orange-500);
  letter-spacing: .04em;
}

.page-about .about-line__title {
  margin: 0 0 8px;
  font-size: clamp(18px, 2.2vw, 22px);
  font-weight: 700;
  color: var(--ink-700);
}

.page-about .about-line__body p {
  max-width: var(--about-maxw);
  margin: 0 0 10px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--fg);
}

.page-about .about-line__meta {
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--ink-500);
}

@media (min-width: 760px) {
  .page-about .about-line {
    grid-template-columns: 76px minmax(0, 1fr);
    gap: clamp(14px, 3vw, 32px);
  }

  .page-about .about-line:nth-child(2) {
    margin-left: clamp(0px, 3vw, 48px);
  }

  .page-about .about-line:nth-child(3) {
    margin-left: clamp(0px, 6vw, 96px);
  }
}

.page-about .about-inline-link {
  margin: 26px 0 0;
  font-size: 15px;
}

/* ---------- 编辑流程 ---------- */
.page-about .about-steps {
  display: grid;
  gap: 12px;
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-step {
  position: relative;
  display: grid;
  gap: 4px;
  padding: 18px 20px 18px 22px;
  border-radius: var(--radius-md);
  background: var(--paper);
  border: 1px solid var(--line-soft);
  overflow: hidden;
}

.page-about .about-step::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 4px;
  background: linear-gradient(180deg, var(--orange-500), var(--cyan-400));
}

.page-about .about-step__num {
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--ink-500);
}

.page-about .about-step__title {
  font-size: 17px;
  font-weight: 700;
  color: var(--ink-700);
}

.page-about .about-step__desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--slate-600);
}

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

  .page-about .about-step:nth-child(even) {
    transform: translateY(18px);
  }
}

.page-about .about-flow {
  width: 100%;
  margin: clamp(28px, 4vw, 44px) 0 0;
  aspect-ratio: 7 / 4;
  border-radius: var(--radius-lg) var(--radius-xs) var(--radius-lg) var(--radius-lg);
  overflow: hidden;
}

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

.page-about .about-note {
  max-width: var(--about-maxw);
  margin: 26px 0 0;
  font-size: 15px;
  line-height: 1.8;
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
  align-items: center;
  margin-top: 26px;
}

.page-about .about-ring {
  margin: 0;
  max-width: 320px;
}

.page-about .about-ring svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-ring__track {
  stroke: rgba(248, 251, 255, .12);
}

.page-about .about-ring__a {
  stroke: var(--orange-500);
}

.page-about .about-ring__b {
  stroke: var(--cyan-400);
}

.page-about .about-ring__num {
  font-family: var(--font-mono);
  font-size: 46px;
  font-weight: 700;
  fill: var(--paper);
}

.page-about .about-ring__cap {
  font-family: var(--font-sans);
  font-size: 12px;
  letter-spacing: .08em;
  fill: rgba(248, 251, 255, .64);
}

.page-about .about-ring__legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  margin-top: 16px;
  font-size: 13px;
  color: var(--about-dark-fg);
}

.page-about .about-ring__legend span {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.page-about .about-ring__legend b {
  color: var(--paper);
  font-size: 15px;
}

.page-about .about-dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.page-about .about-dot--orange {
  background: var(--orange-500);
}

.page-about .about-dot--cyan {
  background: var(--cyan-400);
}

.page-about .about-team__text p {
  max-width: 32rem;
  margin: 0 0 14px;
  font-size: 16px;
  line-height: 1.85;
}

.page-about .about-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-chips li {
  padding: 5px 14px;
  border-radius: 999px;
  border: 1px solid var(--about-dark-line);
  font-size: 13px;
  color: var(--cyan-400);
}

@media (min-width: 760px) {
  .page-about .about-team {
    grid-template-columns: minmax(0, .8fr) minmax(0, 1fr);
  }
}

/* ---------- 版本时间线 ---------- */
.page-about .about-tl {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  position: relative;
}

.page-about .about-tl::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 14px;
  bottom: 14px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--cyan-400), rgba(53, 224, 206, .08));
}

.page-about .about-tl__item {
  position: relative;
  padding: 0 0 8px 36px;
}

.page-about .about-tl__dot {
  position: absolute;
  left: 1px;
  top: 9px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--paper);
  border: 3px solid var(--cyan-400);
  box-sizing: border-box;
}

.page-about .about-tl__d > summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 14px;
  align-items: baseline;
  padding: 8px 0;
  cursor: pointer;
  list-style: none;
}

.page-about .about-tl__d > summary::-webkit-details-marker {
  display: none;
}

.page-about .about-tl__d > summary::after {
  content: "＋";
  font-family: var(--font-mono);
  color: var(--orange-500);
  font-size: 15px;
}

.page-about .about-tl__d[open] > summary::after {
  content: "－";
}

.page-about .about-tl__ver {
  font-size: 15px;
  letter-spacing: .06em;
  color: var(--ink-700);
  background: rgba(53, 224, 206, .16);
  padding: 2px 8px;
  border-radius: var(--radius-xs);
}

.page-about .about-tl__ttl {
  font-size: clamp(16px, 2vw, 19px);
  font-weight: 700;
  color: var(--ink-700);
}

.page-about .about-tl__body {
  padding: 4px 0 18px 2px;
}

.page-about .about-tl__body p {
  max-width: var(--about-maxw);
  margin: 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--slate-600);
}

.page-about .about-tl__d[open] .about-tl__dot {
  background: var(--orange-500);
  border-color: var(--orange-500);
}

/* ---------- 地域横幅 ---------- */
.page-about .about-banner {
  width: 100%;
  margin: 0;
  aspect-ratio: 8 / 3;
  border-radius: var(--radius-lg) var(--radius-xs) var(--radius-lg) var(--radius-lg);
  overflow: hidden;
  background: linear-gradient(120deg, var(--ink-900), var(--ink-500));
}

.page-about .about-banner img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .92;
}

/* ---------- 合作生态 ---------- */
.page-about .about-nums {
  display: grid;
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-num {
  padding: 22px 24px;
  border-radius: var(--radius-md) var(--radius-xs) var(--radius-md) var(--radius-md);
  background: var(--paper);
  border: 1px solid var(--line-soft);
  box-shadow: var(--shadow-soft);
}

.page-about .about-num__v {
  display: block;
  font-size: clamp(38px, 5vw, 56px);
  line-height: 1;
  color: var(--ink-700);
  letter-spacing: -.02em;
}

.page-about .about-num:nth-child(2) .about-num__v {
  color: var(--orange-500);
}

.page-about .about-num:nth-child(3) .about-num__v {
  color: var(--ink-500);
}

.page-about .about-num__t {
  display: block;
  margin-top: 8px;
  font-size: 15px;
  font-weight: 700;
  color: var(--ink-700);
}

.page-about .about-num__d {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--slate-600);
}

@media (min-width: 680px) {
  .page-about .about-nums {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-num:nth-child(2) {
    transform: translateY(20px);
  }
}

.page-about .about-recog {
  max-width: var(--about-maxw);
  margin: 34px 0 0;
  padding-left: 18px;
  border-left: 3px solid var(--cyan-400);
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink-700);
  font-weight: 700;
}

/* ---------- 下一步 ---------- */
.page-about .about-next {
  display: grid;
  gap: 16px;
  margin-top: 8px;
}

.page-about .about-next__item h3 {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 700;
}

.page-about .about-next__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
}

.page-about .about-next__cta {
  margin-top: 28px;
}

@media (min-width: 760px) {
  .page-about .about-next {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
  }
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  display: grid;
  gap: 22px;
  margin: clamp(20px, 4vw, 40px) 0 clamp(48px, 7vw, 88px);
  padding: clamp(26px, 4vw, 48px);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(80% 90% at 92% 10%, rgba(53, 224, 206, .26), transparent 62%),
    linear-gradient(140deg, var(--ink-700), var(--ink-900));
  color: var(--paper);
}

.page-about .about-cta__title {
  margin: 0 0 10px;
  font-size: clamp(21px, 3vw, 30px);
  line-height: 1.3;
  font-weight: 700;
}

.page-about .about-cta__copy p {
  max-width: 34rem;
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--about-dark-fg);
}

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

@media (min-width: 860px) {
  .page-about .about-cta {
    grid-template-columns: minmax(0, 1.4fr) auto;
    align-items: center;
    gap: 32px;
  }

  .page-about .about-cta__actions {
    justify-content: flex-end;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-rail__link,
  .page-about .about-rail__progress span {
    transition: none;
  }

  .page-about .about-step:nth-child(even),
  .page-about .about-num:nth-child(2) {
    transform: none;
  }
}
<<<PAGE_CSS_END>>>
<<<END>>>