.page-about {
  --about-rail: 200px;
  --about-gap: clamp(28px, 4vw, 60px);
  --about-glow: rgba(108, 59, 244, 0.26);
  background-color: var(--ink);
  color: var(--mute);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(96px, 14vh, 168px) 0 clamp(48px, 7vh, 88px);
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -14%;
  right: -8%;
  width: 72vw;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--violet) 42%, var(--cyan) 78%, transparent);
  transform: rotate(12deg);
  transform-origin: right center;
  opacity: 0.6;
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: auto -12% -46% 34%;
  height: 96%;
  background: radial-gradient(circle at 68% 32%, var(--about-glow), transparent 64%);
  pointer-events: none;
}

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

.page-about .breadcrumb {
  margin-bottom: clamp(22px, 3vw, 38px);
}

.page-about .about-hero__kicker {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-about .about-hero__title {
  margin: 18px 0 0;
  max-width: 20ch;
  font-size: clamp(38px, 6.2vw, 88px);
  font-weight: 300;
  line-height: 1.08;
  letter-spacing: -0.03em;
  color: var(--paper);
}

.page-about .about-hero__lede {
  max-width: 46ch;
  margin: 26px 0 0;
  font-size: 17px;
  line-height: 1.85;
  color: var(--mute);
}

.page-about .about-hero__meta {
  list-style: none;
  margin: clamp(30px, 4vw, 48px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 24px;
  border-top: 1px solid var(--line);
  padding-top: 22px;
  max-width: 620px;
}

.page-about .about-hero__meta li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 15px;
  color: var(--paper);
}

.page-about .about-hero__meta .mono {
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--blue);
}

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

/* ---------- 主体骨架 ---------- */
.page-about .about-shell {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(32px, 5vw, 56px);
  padding: clamp(48px, 7vh, 88px) 0 clamp(72px, 10vh, 128px);
}

@media (min-width: 1080px) {
  .page-about .about-shell {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: var(--about-gap);
  }
}

/* ---------- 左侧章节索引 ---------- */
.page-about .about-rail {
  border-top: 1px solid var(--line);
  padding-top: 16px;
}

.page-about .about-rail__label {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--paper-2);
}

.page-about .about-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 18px;
  overflow-x: auto;
  scrollbar-width: none;
}

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

.page-about .about-rail__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 9px 0;
  font-size: 14px;
  line-height: 1.4;
  white-space: nowrap;
  color: var(--mute);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.22s ease, border-color 0.22s ease;
}

.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible {
  color: var(--paper);
}

.page-about .about-rail__link[aria-current="true"] {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-about .about-rail__num {
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--blue);
}

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

@media (min-width: 1080px) {
  .page-about .about-rail {
    position: sticky;
    top: calc(var(--header-h) + 36px);
    align-self: start;
  }

  .page-about .about-rail__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
  }

  .page-about .about-rail__link {
    width: 100%;
    padding: 10px 0;
  }
}

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

.page-about .about-section {
  padding-top: clamp(48px, 6vh, 80px);
  margin-top: clamp(48px, 6vh, 80px);
  border-top: 1px solid var(--line-soft);
}

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

.page-about .about-lede {
  max-width: 52ch;
  margin: 0 0 clamp(26px, 3vw, 40px);
  font-size: 16px;
  line-height: 1.85;
  color: var(--mute);
}

.page-about .about-prose {
  padding: clamp(24px, 3.4vw, 40px);
  border-radius: var(--radius);
}

.page-about .about-prose p {
  margin: 0 0 1em;
  max-width: 46ch;
  font-size: 17px;
  line-height: 1.85;
}

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

.page-about .about-prose--compact {
  margin-top: clamp(24px, 3vw, 36px);
}

.page-about .about-links {
  margin-top: clamp(24px, 3vw, 36px);
}

/* ---------- 版本时间轴 ---------- */
.page-about .about-timeline {
  margin: 0 0 clamp(28px, 3.6vw, 48px);
}

.page-about .about-timeline .timeline-item {
  border-top: 1px solid var(--line-soft);
  padding-top: 22px;
  padding-bottom: 22px;
  transition: background-color 0.22s ease;
}

.page-about .about-timeline .timeline-item:last-child {
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-timeline .timeline-index {
  color: var(--blue);
  transition: color 0.22s ease;
}

.page-about .about-timeline .timeline-item:hover .timeline-index,
.page-about .about-timeline .timeline-item:focus-within .timeline-index {
  color: var(--cyan);
}

.page-about .about-timeline h3 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--paper);
}

.page-about .about-timeline p {
  margin: 0;
  max-width: 54ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mute);
}

/* ---------- 图片容器 ---------- */
.page-about .about-figure {
  margin: 0;
  border-radius: var(--radius);
  overflow: hidden;
}

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

.page-about .about-figure--version {
  margin-top: clamp(8px, 1.5vw, 18px);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 3.4vw, 40px);
  align-items: start;
}

@media (min-width: 900px) {
  .page-about .about-team {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.86fr);
  }
}

.page-about .about-team__text > p {
  margin: 0 0 22px;
  max-width: 46ch;
  font-size: 16px;
  line-height: 1.85;
}

.page-about .about-team__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 20px;
}

.page-about .about-team__list li {
  border-left: 1px solid var(--line-cyan);
  padding-left: 18px;
}

.page-about .about-team__badge {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--cyan);
  margin-bottom: 8px;
}

.page-about .about-team__list p {
  margin: 0;
  max-width: 42ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mute);
}

.page-about .about-team .note {
  margin-top: 24px;
}

/* ---------- 规模数据 ---------- */
.page-about .about-scale {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
}

@media (min-width: 620px) {
  .page-about .about-scale {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 32px;
  }
}

@media (min-width: 1180px) {
  .page-about .about-scale {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .about-scale__item {
  border-top: 1px solid var(--line);
  padding: 24px 0 26px;
}

.page-about .about-scale__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(30px, 3.6vw, 42px);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-scale__unit {
  font-style: normal;
  font-size: 0.46em;
  letter-spacing: 0.06em;
  color: var(--cyan);
  margin-left: 6px;
}

.page-about .about-scale__label {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mute);
  max-width: 34ch;
}

/* ---------- 备案 ---------- */
.page-about .about-filing {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3.4vw, 40px);
  align-items: stretch;
}

@media (min-width: 900px) {
  .page-about .about-filing {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  }
}

.page-about .about-filing__card {
  border: 1px solid rgba(108, 59, 244, 0.55);
  background: linear-gradient(158deg, rgba(108, 59, 244, 0.16), rgba(21, 14, 43, 0.6));
  border-radius: var(--radius);
  padding: clamp(24px, 3.4vw, 40px);
}

.page-about .about-filing__label {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--paper-2);
}

.page-about .about-filing__value {
  margin: 10px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(22px, 3vw, 32px);
  line-height: 1.35;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-about .about-filing__region {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--cyan);
}

.page-about .about-filing__list {
  list-style: none;
  margin: 26px 0 0;
  padding: 20px 0 0;
  border-top: 1px solid var(--line);
  display: grid;
  gap: 12px;
}

.page-about .about-filing__list li {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 14px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--paper);
}

.page-about .about-filing__list .mono {
  min-width: 76px;
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--blue);
}

.page-about .about-filing__figure-wrap {
  display: contents;
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  margin-top: clamp(64px, 9vh, 112px);
  padding-top: clamp(40px, 5vh, 64px);
  border-top: 1px solid var(--line-cyan);
  max-width: 640px;
}

.page-about .about-cta__kicker {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-about .about-cta__title {
  margin: 16px 0 0;
  font-size: clamp(24px, 3.4vw, 34px);
  font-weight: 600;
  line-height: 1.35;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-cta__text {
  margin: 16px 0 0;
  max-width: 46ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--mute);
}

.page-about .about-cta__actions {
  margin-top: 28px;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

@media (max-width: 560px) {
  .page-about .about-hero__title {
    max-width: none;
  }

  .page-about .about-cta__actions .btn {
    width: 100%;
    text-align: center;
  }
}
</final>