.page-about {
  --about-gap: clamp(28px, 4vw, 52px);
  position: relative;
}

/* ---------- 封面 ---------- */
.page-about .about-cover {
  position: relative;
  padding-block: clamp(20px, 4vw, 40px) clamp(32px, 5vw, 64px);
}

.page-about .about-cover::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: min(560px, 78vh);
  background:
    radial-gradient(48% 62% at 16% 26%, var(--cyan-14), transparent 70%),
    radial-gradient(46% 58% at 84% 8%, var(--violet-22), transparent 72%);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-cover > .pgk-container {
  position: relative;
  z-index: 1;
}

.page-about .about-cover__grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  margin-top: clamp(20px, 3vw, 36px);
  align-items: start;
}

.page-about .about-cover__title {
  font-size: clamp(34px, 6.6vw, 76px);
  line-height: 1.06;
  letter-spacing: 0.01em;
  margin-bottom: 18px;
}

.page-about .about-cover__lead .pgk-lead {
  max-width: 56ch;
  line-height: 1.8;
}

.page-about .about-cover__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-about .about-cover__card {
  margin: 0;
  padding: 14px;
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  background: linear-gradient(158deg, rgba(18, 27, 56, 0.92), rgba(11, 16, 36, 0.86));
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(10px);
}

.page-about .about-cover__frame {
  position: relative;
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .about-cover__tags {
  position: absolute;
  inset: auto 12px 12px 12px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-cover__tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 11px;
  border-radius: var(--r-pill);
  font-size: 12px;
  color: var(--paper);
  background: rgba(5, 7, 15, 0.72);
  border: 1px solid var(--line);
  backdrop-filter: blur(6px);
}

.page-about .about-cover__tag .pgk-mono {
  color: var(--cyan);
  font-size: 11px;
  letter-spacing: 0.12em;
}

.page-about .about-cover__cap {
  margin: 12px 4px 2px;
  font-size: 13px;
  color: var(--muted);
  letter-spacing: 0.02em;
}

/* ---------- 数据条 ---------- */
.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-stat {
  position: relative;
  padding: 16px 14px 14px;
  border-radius: var(--r-md);
  border: 1px solid var(--line);
  background: linear-gradient(170deg, rgba(18, 27, 56, 0.88), rgba(5, 7, 15, 0.6));
  overflow: hidden;
  transition: border-color 0.3s var(--ease), transform 0.3s var(--ease);
}

.page-about .about-stat::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--violet) 62%, transparent);
  opacity: 0.7;
}

.page-about .about-stat:hover,
.page-about .about-stat:focus-within {
  border-color: var(--cyan-28);
  transform: translateY(-2px);
}

.page-about .about-stat__num {
  display: block;
  font-size: clamp(26px, 4.6vw, 38px);
  line-height: 1.1;
  color: var(--paper);
  letter-spacing: 0.06em;
}

.page-about .about-stat__label {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  color: var(--muted);
}

.page-about .about-stat__note {
  display: block;
  margin-top: 8px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--muted);
}

@media (min-width: 900px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
  }
  .page-about .about-stat {
    padding: 20px 18px 18px;
  }
  .page-about .about-stat__note {
    opacity: 0;
    transform: translateY(-4px);
    transition: opacity 0.28s var(--ease), transform 0.28s var(--ease);
  }
  .page-about .about-stat:hover .about-stat__note,
  .page-about .about-stat:focus-within .about-stat__note {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 档案流：索引 + 正文 ---------- */
.page-about .about-flow {
  display: grid;
  gap: var(--about-gap);
  padding-block: clamp(32px, 5vw, 72px) clamp(40px, 6vw, 88px);
}

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

.page-about .about-index__title {
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--violet);
  margin: 0 0 12px;
}

.page-about .about-index .pgk-spy-list {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-index .pgk-spy-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: var(--r-pill);
  border: 1px solid transparent;
  font-size: 13px;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.25s var(--ease), background 0.25s var(--ease), border-color 0.25s var(--ease);
}

.page-about .about-index .pgk-spy-link::before {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--line);
  transition: background 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.page-about .about-index .pgk-spy-link:hover {
  color: var(--paper);
  border-color: var(--line);
}

.page-about .about-index .pgk-spy-link.is-active {
  color: var(--cyan);
  background: var(--cyan-06);
  border-color: var(--cyan-28);
}

.page-about .about-index .pgk-spy-link.is-active::before {
  background: var(--cyan);
  box-shadow: 0 0 10px var(--cyan-28);
}

.page-about .about-body {
  display: grid;
  gap: clamp(44px, 6vw, 84px);
  min-width: 0;
}

@media (min-width: 1024px) {
  .page-about .about-flow {
    grid-template-columns: 208px minmax(0, 1fr);
    gap: 64px;
  }
  .page-about .about-index {
    position: sticky;
    top: 104px;
    align-self: start;
  }
  .page-about .about-index .pgk-spy-list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 2px;
  }
  .page-about .about-index .pgk-spy-link {
    width: 100%;
    border-radius: var(--r-sm);
    padding: 9px 12px;
  }
}

/* ---------- 区块通用 ---------- */
.page-about .about-sec {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
  scroll-margin-top: 96px;
}

.page-about .about-sec__head .pgk-lead {
  max-width: 62ch;
}

.page-about .about-sec .pgk-h2 {
  font-size: clamp(26px, 4.2vw, 44px);
  line-height: 1.16;
  margin-bottom: 12px;
}

/* ---------- 年份刻度 ---------- */
.page-about .about-scale {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .about-scale__link {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.12em;
  padding: 6px 14px;
  border-radius: var(--r-pill);
  border: 1px solid var(--line);
  color: var(--muted);
  text-decoration: none;
  transition: color 0.25s var(--ease), background 0.25s var(--ease), border-color 0.25s var(--ease), transform 0.25s var(--ease);
}

.page-about .about-scale__link:hover {
  color: var(--ink-0);
  background: var(--cyan);
  border-color: var(--cyan);
  transform: translateY(-2px);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  position: relative;
  margin: 0;
  padding: 0 0 0 22px;
  list-style: none;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(to bottom, var(--cyan-28), var(--violet-22) 60%, transparent);
}

.page-about .about-tl-item {
  position: relative;
  padding-bottom: 28px;
  scroll-margin-top: 110px;
}

.page-about .about-tl-item:last-child {
  padding-bottom: 0;
}

.page-about .about-tl-item::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 7px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--ink-0);
  border: 1px solid var(--line);
  box-shadow: 0 0 0 4px var(--ink-0);
  transition: background 0.25s var(--ease), border-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.page-about .about-tl-item:hover::before,
.page-about .about-tl-item:focus-within::before {
  background: var(--cyan);
  border-color: var(--cyan);
  box-shadow: 0 0 0 4px var(--ink-0), 0 0 16px var(--cyan-28);
}

.page-about .about-tl-year {
  display: block;
  font-size: 18px;
  letter-spacing: 0.14em;
  color: var(--cyan);
  margin-bottom: 6px;
}

.page-about .about-tl-body .pgk-h3 {
  font-size: 19px;
  margin: 0 0 8px;
  color: var(--paper);
}

.page-about .about-tl-body p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.85;
  max-width: 60ch;
}

@media (min-width: 760px) {
  .page-about .about-timeline {
    padding-left: 28px;
  }
  .page-about .about-tl-item {
    display: grid;
    grid-template-columns: 84px minmax(0, 1fr);
    gap: 22px;
    padding-bottom: 34px;
  }
  .page-about .about-tl-item::before {
    left: -32px;
    top: 10px;
  }
  .page-about .about-tl-year {
    font-size: 22px;
    text-align: right;
    margin-bottom: 0;
  }
}

/* ---------- 会员中心分栏 ---------- */
.page-about .about-split {
  display: grid;
  gap: clamp(22px, 3vw, 36px);
  align-items: center;
}

.page-about .about-split__text p {
  color: var(--muted);
  line-height: 1.85;
  font-size: 15.5px;
}

.page-about .about-ticks {
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-about .about-ticks li {
  position: relative;
  padding-left: 22px;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--paper);
}

.page-about .about-ticks li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 10px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--gold), var(--gold-38));
}

@media (min-width: 900px) {
  .page-about .about-split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.82fr);
    gap: 48px;
  }
}

/* ---------- 媒体容器 ---------- */
.page-about .about-media {
  position: relative;
  overflow: hidden;
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  background: var(--ink-2);
  box-shadow: var(--shadow-card);
}

.page-about .about-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(43, 242, 196, 0.07) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(143, 98, 255, 0.06) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
}

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

.page-about .about-cover__media {
  aspect-ratio: 14 / 9;
}

.page-about .about-media--tall {
  aspect-ratio: 4 / 3;
}

.page-about .about-media--wide {
  aspect-ratio: 3 / 2;
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-team__card {
  position: relative;
  padding: 22px 20px;
  border-radius: var(--r-md);
  border: 1px solid var(--line);
  background: linear-gradient(165deg, rgba(18, 27, 56, 0.9), rgba(11, 16, 36, 0.7));
  transition: border-color 0.3s var(--ease), box-shadow 0.3s var(--ease), transform 0.3s var(--ease);
}

.page-about .about-team__card:hover {
  border-color: var(--violet-22);
  box-shadow: 0 0 0 1px var(--violet-12), 0 24px 48px -40px rgba(143, 98, 255, 0.8);
  transform: translateY(-3px);
}

.page-about .about-team__num {
  display: block;
  font-size: clamp(30px, 4.4vw, 40px);
  line-height: 1;
  color: var(--violet);
  letter-spacing: 0.06em;
}

.page-about .about-team__name {
  margin: 10px 0 8px;
  font-size: 17px;
  color: var(--paper);
  letter-spacing: 0.02em;
}

.page-about .about-team__card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

@media (min-width: 820px) {
  .page-about .about-team {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }
}

/* ---------- 协作生态 ---------- */
.page-about .about-eco__grid {
  display: grid;
  gap: clamp(22px, 3vw, 40px);
  align-items: center;
}

.page-about .about-eco__text > p {
  color: var(--muted);
  line-height: 1.85;
  font-size: 15.5px;
}

.page-about .about-eco__steps {
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 14px;
}

.page-about .about-eco__step {
  padding: 14px 16px;
  border-radius: var(--r-sm);
  border: 1px solid var(--line);
  border-left: 2px solid var(--cyan-28);
  background: var(--cyan-06);
}

.page-about .about-eco__stepnum {
  display: block;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--cyan);
  margin-bottom: 6px;
}

.page-about .about-eco__step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--paper);
}

@media (min-width: 960px) {
  .page-about .about-eco__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.9fr);
    gap: 48px;
  }
}

/* ---------- 里程碑 ---------- */
.page-about .about-honor {
  display: grid;
  gap: 14px;
}

.page-about .about-honor__card {
  padding: 22px 20px;
  border-radius: var(--r-md);
  border: 1px solid var(--line);
  background: linear-gradient(170deg, rgba(18, 27, 56, 0.86), rgba(5, 7, 15, 0.6));
}

.page-about .about-honor__card p {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-honor__card--badge {
  border-color: var(--gold-38);
  background:
    radial-gradient(120% 140% at 0% 0%, var(--gold-12), transparent 62%),
    linear-gradient(170deg, rgba(18, 27, 56, 0.92), rgba(5, 7, 15, 0.72));
}

.page-about .about-honor__card--badge .pgk-h3 {
  margin: 12px 0 0;
  font-size: 20px;
  line-height: 1.4;
  color: var(--paper);
}

.page-about .about-honor__num {
  display: block;
  font-size: clamp(24px, 3.6vw, 32px);
  letter-spacing: 0.08em;
  color: var(--cyan);
}

@media (min-width: 760px) {
  .page-about .about-honor {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }
  .page-about .about-honor__card--badge {
    grid-column: 1 / -1;
  }
}

@media (min-width: 1080px) {
  .page-about .about-honor {
    grid-template-columns: 1.25fr 1fr 1fr 1fr;
  }
  .page-about .about-honor__card--badge {
    grid-column: auto;
  }
}

/* ---------- 相关入口 ---------- */
.page-about .about-cta {
  padding-top: clamp(22px, 3vw, 36px);
  border-top: 1px solid var(--line);
}

.page-about .about-cta .pgk-h2 {
  font-size: clamp(24px, 3.6vw, 36px);
  margin-bottom: 20px;
}

.page-about .about-cta__grid {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-cta__card {
  display: grid;
  gap: 6px;
  height: 100%;
  padding: 18px;
  border-radius: var(--r-md);
  border: 1px solid var(--line);
  background: rgba(11, 16, 36, 0.7);
  text-decoration: none;
  transition: border-color 0.28s var(--ease), background 0.28s var(--ease), transform 0.28s var(--ease);
}

.page-about .about-cta__card:hover {
  border-color: var(--cyan-28);
  background: var(--cyan-06);
  transform: translateY(-3px);
}

.page-about .about-cta__card .pgk-mono {
  font-size: 10.5px;
  letter-spacing: 0.22em;
  color: var(--violet);
}

.page-about .about-cta__card strong {
  font-size: 17px;
  color: var(--paper);
  font-weight: 700;
  letter-spacing: 0.02em;
}

.page-about .about-cta__card span:last-child {
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

.page-about .about-cta__note {
  margin: 18px 0 0;
  font-size: 13.5px;
  color: var(--muted);
}

.page-about .about-cta__note a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--cyan-28);
}

.page-about .about-cta__note a:hover {
  color: var(--paper);
}

@media (min-width: 640px) {
  .page-about .about-cta__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }
}

@media (min-width: 1024px) {
  .page-about .about-cta__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 封面栅格桌面化 ---------- */
@media (min-width: 960px) {
  .page-about .about-cover__grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
    gap: 56px;
    align-items: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-stat,
  .page-about .about-team__card,
  .page-about .about-cta__card,
  .page-about .about-scale__link {
    transition: opacity 0.2s linear, border-color 0.2s linear;
    transform: none;
  }
  .page-about .about-stat:hover,
  .page-about .about-team__card:hover,
  .page-about .about-cta__card:hover,
  .page-about .about-scale__link:hover {
    transform: none;
  }
}