.page-about {
  --about-rail-w: 244px;
  --about-flow-max: 72ch;
  display: block;
  position: relative;
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumbs-wrap {
  padding-top: clamp(14px, 2.4vw, 24px);
}

/* ---------- 分屏首屏 ---------- */
.page-about .about-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 5vw, 44px);
  padding-block: clamp(22px, 4vw, 44px) clamp(34px, 6vw, 72px);
  align-items: center;
}

.page-about .about-hero-copy {
  min-width: 0;
}

.page-about .about-title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.05rem, 6.6vw, 4.1rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--c-mist);
  background-image: linear-gradient(118deg, #ffffff 0%, var(--c-mist) 42%, var(--c-blue) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.page-about .about-lede {
  margin: clamp(16px, 2.4vw, 22px) 0 0;
  max-width: 56ch;
  font-size: clamp(0.96rem, 1.9vw, 1.08rem);
  line-height: 1.9;
  color: rgba(230, 234, 245, 0.84);
}

.page-about .about-hero-stats {
  list-style: none;
  margin: clamp(22px, 3.2vw, 32px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md);
  background-color: var(--line-soft);
  overflow: hidden;
}

.page-about .about-hero-stats li {
  padding: 14px 16px 16px;
  background-color: rgba(21, 16, 46, 0.78);
  min-width: 0;
}

.page-about .about-stat-num {
  display: block;
  font-family: var(--font-num);
  font-size: clamp(1.5rem, 4vw, 2rem);
  font-weight: 700;
  line-height: 1;
  color: var(--c-cyan);
  letter-spacing: -0.02em;
}

.page-about .about-stat-label {
  display: block;
  margin-top: 7px;
  font-size: 0.78rem;
  line-height: 1.5;
  color: var(--c-muted);
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3.2vw, 30px);
}

.page-about .about-hero-visual {
  position: relative;
  margin: 0;
  min-width: 0;
}

.page-about .about-orb {
  position: absolute;
  inset: -7% 6% 14% 12%;
  border-radius: 46% 54% 38% 62% / 58% 42% 58% 42%;
  background-image: var(--grad-key);
  opacity: 0.3;
  filter: blur(6px);
  z-index: 0;
  pointer-events: none;
}

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

.page-about .about-hero-visual .media-caption {
  position: relative;
  z-index: 1;
}

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

/* ---------- 正文骨架 ---------- */
.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 40px);
  padding-block: clamp(20px, 3vw, 32px) clamp(56px, 8vw, 104px);
}

/* ---------- 索引侧栏 ---------- */
.page-about .about-rail {
  min-width: 0;
}

.page-about .about-rail-title {
  margin: 0 0 12px;
  font-family: var(--font-num);
  font-size: 0.74rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--c-muted);
}

.page-about .about-rail-list {
  list-style: none;
  margin: 0;
  padding: 0 0 8px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-about .about-rail-list li {
  flex: 0 0 auto;
}

.page-about .about-rail-link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  white-space: nowrap;
  padding: 9px 14px;
  border-radius: var(--r-pill);
  border: 1px solid var(--line-soft);
  background-color: rgba(21, 16, 46, 0.5);
  color: var(--c-muted);
  font-size: 0.85rem;
  text-decoration: none;
  transition: color 0.28s var(--ease), border-color 0.28s var(--ease), background-color 0.28s var(--ease), transform 0.28s var(--ease);
}

.page-about .about-rail-link .numeric {
  font-size: 0.72rem;
  color: var(--c-blue);
}

.page-about .about-rail-link:hover,
.page-about .about-rail-link:focus-visible {
  color: var(--c-mist);
  border-color: var(--line-strong);
  background-color: rgba(108, 59, 255, 0.18);
  transform: translateY(-2px);
}

.page-about .about-rail-link:focus-visible {
  outline: 2px solid var(--c-orange);
  outline-offset: 3px;
}

.page-about .about-rail-note {
  margin: 14px 0 0;
  color: var(--c-muted);
  display: none;
}

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

.page-about .about-section {
  position: relative;
  padding-block: clamp(26px, 4.6vw, 46px);
}

.page-about .about-section + .about-section {
  border-top: 1px solid var(--line-soft);
}

.page-about .about-index {
  margin: 0 0 12px;
  color: var(--c-muted);
  letter-spacing: 0.16em;
}

.page-about .about-index .numeric {
  color: var(--c-orange);
  font-size: 0.8rem;
}

.page-about .about-h2 {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.42rem, 3.6vw, 2.2rem);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--c-mist);
}

.page-about .about-h2::before {
  content: "";
  display: block;
  width: 54px;
  height: 3px;
  border-radius: 3px;
  margin-bottom: 14px;
  background-image: var(--grad-key);
}

.page-about .about-prose p,
.page-about .about-lead-p {
  margin: 0 0 1em;
  max-width: var(--about-flow-max);
  font-size: clamp(0.94rem, 1.7vw, 1.02rem);
  line-height: 1.88;
  color: rgba(230, 234, 245, 0.82);
}

.page-about .about-lead-p--after {
  margin-top: 22px;
  padding-left: 16px;
  border-left: 2px solid rgba(47, 184, 255, 0.4);
  font-size: 0.94rem;
}

.page-about .about-prose p:last-child,
.page-about .about-lead-p:last-child {
  margin-bottom: 0;
}

/* ---------- 三个价值点 ---------- */
.page-about .about-values {
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .about-value {
  padding: 20px 20px 22px;
  border-radius: var(--r-md);
  border: 1px solid var(--line-soft);
  background-color: rgba(21, 16, 46, 0.6);
  transition: transform 0.32s var(--ease), border-color 0.32s var(--ease), background-color 0.32s var(--ease);
}

.page-about .about-value:hover {
  transform: translateY(-4px);
  border-color: var(--line-strong);
  background-color: rgba(21, 16, 46, 0.9);
}

.page-about .about-value h3 {
  margin: 0 0 10px;
  font-size: 1.04rem;
  font-weight: 700;
  color: var(--c-cyan);
}

.page-about .about-value p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.78;
  color: rgba(230, 234, 245, 0.78);
}

/* ---------- 章节配图 ---------- */
.page-about .about-figure {
  margin: clamp(22px, 3.4vw, 32px) 0;
}

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

/* ---------- 团队分工 ---------- */
.page-about .about-roster {
  list-style: none;
  margin: clamp(22px, 3.2vw, 32px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--gap);
}

.page-about .about-roster-item {
  position: relative;
  padding: 18px 18px 20px 24px;
  border-radius: var(--r-sm);
  border: 1px solid var(--line-soft);
  background-image: linear-gradient(165deg, rgba(108, 59, 255, 0.14), rgba(21, 16, 46, 0.5));
  transition: transform 0.32s var(--ease), border-color 0.32s var(--ease);
}

.page-about .about-roster-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 16px;
  bottom: 16px;
  width: 3px;
  border-radius: 3px;
  background-image: var(--grad-key);
}

.page-about .about-roster-item:hover {
  transform: translateY(-3px);
  border-color: var(--line-strong);
}

.page-about .about-roster-num {
  display: inline-block;
  font-family: var(--font-num);
  font-size: 1.45rem;
  font-weight: 700;
  line-height: 1;
  color: var(--c-cyan);
  margin-bottom: 10px;
}

.page-about .about-roster-title {
  margin: 0 0 8px;
  font-size: 1rem;
  font-weight: 700;
  color: var(--c-mist);
}

.page-about .about-roster-item p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.78;
  color: rgba(230, 234, 245, 0.76);
}

/* ---------- 内容准则三步 ---------- */
.page-about .about-steps {
  list-style: none;
  margin: clamp(20px, 3.2vw, 30px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md);
  background-color: var(--line-soft);
  overflow: hidden;
}

.page-about .about-step {
  padding: 22px 20px 24px;
  background-color: rgba(11, 16, 32, 0.88);
  min-width: 0;
  transition: background-color 0.32s var(--ease);
}

.page-about .about-step:hover {
  background-color: rgba(21, 16, 46, 0.98);
}

.page-about .about-step-num {
  font-family: var(--font-num);
  font-size: 0.74rem;
  letter-spacing: 0.2em;
  color: var(--c-orange);
}

.page-about .about-step h3 {
  margin: 12px 0 10px;
  font-size: 1.06rem;
  font-weight: 700;
  color: var(--c-mist);
}

.page-about .about-step p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.8;
  color: rgba(230, 234, 245, 0.78);
}

/* ---------- 版本时间轴 ---------- */
.page-about .about-track {
  position: relative;
  list-style: none;
  margin: clamp(22px, 3.2vw, 32px) 0 0;
  padding: 0 0 0 30px;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 3vw, 28px);
}

.page-about .about-track::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background-image: linear-gradient(180deg, var(--c-violet), var(--c-blue) 58%, rgba(47, 184, 255, 0));
}

.page-about .about-node {
  position: relative;
  min-width: 0;
  transition: transform 0.32s var(--ease);
}

.page-about .about-node::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 10px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background-color: var(--c-night);
  border: 2px solid var(--c-blue);
  box-shadow: 0 0 0 4px rgba(47, 184, 255, 0.14);
  transition: border-color 0.32s var(--ease), box-shadow 0.32s var(--ease), transform 0.32s var(--ease);
}

.page-about .about-node:hover,
.page-about .about-node:focus-within {
  transform: translateX(6px);
}

.page-about .about-node:hover::before,
.page-about .about-node:focus-within::before {
  border-color: var(--c-orange);
  box-shadow: 0 0 0 7px rgba(255, 138, 61, 0.16);
  transform: scale(1.06);
}

.page-about .about-node-kicker {
  margin: 0;
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-num);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--c-muted);
}

.page-about .about-node-kicker .tag {
  font-family: var(--font-num);
  color: var(--c-cyan);
}

.page-about .about-node h3 {
  margin: 10px 0 8px;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--c-mist);
}

.page-about .about-node p {
  margin: 0;
  max-width: var(--about-flow-max);
  font-size: 0.93rem;
  line-height: 1.82;
  color: rgba(230, 234, 245, 0.78);
}

.page-about .about-node-kicker + h3 + p {
  margin-top: 0;
}

/* ---------- 合作 ---------- */
.page-about .about-partners {
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .about-partner {
  padding: 20px 20px 22px;
  border-radius: var(--r-md);
  border: 1px solid var(--line-soft);
  background-color: rgba(21, 16, 46, 0.55);
  transition: transform 0.32s var(--ease), border-color 0.32s var(--ease);
}

.page-about .about-partner:hover {
  transform: translateY(-4px);
  border-color: var(--line-strong);
}

.page-about .about-partner-num {
  display: block;
  font-family: var(--font-num);
  font-size: clamp(1.7rem, 4.6vw, 2.2rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  background-image: linear-gradient(120deg, var(--c-violet), var(--c-blue));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.page-about .about-partner h3 {
  margin: 10px 0 8px;
  font-size: 1rem;
  font-weight: 700;
  color: var(--c-mist);
}

.page-about .about-partner p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.78;
  color: rgba(230, 234, 245, 0.76);
}

.page-about .about-honor {
  margin-top: clamp(20px, 3vw, 30px);
  padding: 22px 22px 24px;
  border-radius: var(--r-md);
  border: 1px solid var(--line);
  border-left: 3px solid var(--c-orange);
  background-color: rgba(11, 16, 32, 0.66);
}

.page-about .about-honor .eyebrow {
  margin: 0 0 10px;
}

.page-about .about-honor-text {
  margin: 0;
  max-width: var(--about-flow-max);
  font-size: 0.96rem;
  line-height: 1.84;
  color: rgba(230, 234, 245, 0.85);
}

/* ---------- 结尾引导 ---------- */
.page-about .about-cta {
  margin-top: clamp(28px, 4.6vw, 48px);
  padding: clamp(24px, 4vw, 42px);
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  background-color: rgba(21, 16, 46, 0.74);
  background-image: var(--grad-veil);
}

.page-about .about-cta-title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.3rem, 3.2vw, 1.85rem);
  line-height: 1.25;
  color: var(--c-mist);
}

.page-about .about-cta p {
  margin: 0;
  max-width: 56ch;
  font-size: 0.95rem;
  line-height: 1.84;
  color: rgba(230, 234, 245, 0.82);
}

.page-about .about-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

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

/* ---------- 桌面 ---------- */
@media (min-width: 960px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.04fr) minmax(0, 0.96fr);
    gap: clamp(30px, 4.4vw, 62px);
  }

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

  .page-about .about-vert {
    display: block;
    position: absolute;
    right: -22px;
    top: 8%;
    z-index: 2;
    writing-mode: vertical-rl;
    font-size: 0.72rem;
    letter-spacing: 0.3em;
    color: var(--c-muted);
    white-space: nowrap;
  }

  .page-about .about-body {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: clamp(34px, 4.6vw, 68px);
  }

  .page-about .about-rail {
    position: sticky;
    top: calc(var(--header-pad) + 104px);
    align-self: start;
  }

  .page-about .about-rail-list {
    flex-direction: column;
    gap: 4px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-rail-link {
    display: flex;
    width: 100%;
    border-radius: var(--r-sm);
    border-color: transparent;
    background-color: transparent;
  }

  .page-about .about-rail-note {
    display: block;
    writing-mode: vertical-rl;
    letter-spacing: 0.28em;
    padding-left: 4px;
    margin-top: 24px;
  }

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

  .page-about .about-track {
    padding-left: 34px;
  }

  .page-about .about-node::before {
    left: -34px;
  }
}

@media (min-width: 1180px) {
  .page-about .about-section {
    padding-block: clamp(36px, 4vw, 58px);
  }
}
<<<END>>>