.page-about {
  --about-ink-wash: rgba(18, 28, 66, .72);
  --about-legacy: rgba(165, 140, 115, .42);
  --about-body: rgba(243, 233, 215, .8);
  --about-body-dim: rgba(243, 233, 215, .62);
}

/* ---------- 通用排版 ---------- */
.page-about h2 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.5rem, 3.6vw, 2.55rem);
  line-height: 1.24;
  letter-spacing: -.005em;
  color: var(--paper);
}

.page-about h3 {
  margin: 0 0 8px;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: clamp(1.02rem, 1.9vw, 1.22rem);
  line-height: 1.4;
  color: var(--paper);
}

.page-about p {
  margin: 0 0 14px;
  color: var(--about-body);
  line-height: 1.78;
}

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

.page-about .lede {
  max-width: 58ch;
  font-size: clamp(.98rem, 1.6vw, 1.08rem);
  color: var(--about-body-dim);
}

.page-about .figure {
  margin: 0;
  border-radius: var(--radius-m);
  overflow: hidden;
  border: 1px solid var(--line-soft);
}

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

.page-about .rule {
  margin-top: 0;
  margin-bottom: 0;
}

/* ---------- 首屏框景 ---------- */
.page-about .about-hero {
  padding-top: clamp(18px, 4vw, 40px);
}

.page-about .about-hero__frame {
  position: relative;
  padding: clamp(20px, 4vw, 48px);
  background:
    radial-gradient(circle at 88% 8%, rgba(47, 184, 166, .16), transparent 46%),
    radial-gradient(circle at 4% 94%, rgba(215, 67, 47, .14), transparent 42%),
    linear-gradient(158deg, rgba(18, 28, 66, .94), rgba(10, 18, 48, .98));
  overflow: hidden;
}

.page-about .about-hero__frame::after {
  content: "";
  position: absolute;
  right: clamp(-60px, -4vw, -30px);
  top: clamp(-60px, -4vw, -30px);
  width: 220px;
  height: 220px;
  border-radius: 50%;
  border: 1px solid var(--line-gold);
  box-shadow:
    0 0 0 26px rgba(231, 184, 75, .05),
    0 0 0 52px rgba(231, 184, 75, .03);
  pointer-events: none;
}

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

.page-about .about-hero h1 {
  margin: 16px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.9rem, 6.2vw, 4.1rem);
  line-height: 1.1;
  letter-spacing: -.015em;
  color: var(--paper);
}

.page-about .about-hero h1 em {
  font-style: normal;
  display: inline-block;
  color: var(--gold);
  border-bottom: 3px solid rgba(231, 184, 75, .45);
  padding-bottom: 2px;
}

.page-about .about-hero .lede {
  margin-top: clamp(16px, 2.4vw, 24px);
}

.page-about .about-hero__scales {
  display: flex;
  gap: clamp(10px, 2.4vw, 30px);
  margin-top: clamp(22px, 3.6vw, 38px);
  padding-top: 16px;
  border-top: 1px solid var(--line);
  overflow-x: auto;
  scrollbar-width: none;
}

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

.page-about .about-hero__scale {
  position: relative;
  flex: 0 0 auto;
  padding-top: 15px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .09em;
  color: var(--mist);
  text-decoration: none;
  transition: color var(--dur) var(--ease);
}

.page-about .about-hero__scale::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 1px;
  height: 9px;
  background: var(--line-gold);
  transition: height var(--dur) var(--ease), background var(--dur) var(--ease);
}

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

.page-about .about-hero__scale:hover::before,
.page-about .about-hero__scale:focus-visible::before {
  height: 14px;
  background: var(--gold);
}

.page-about .about-hero__fig {
  margin-top: clamp(16px, 2.6vw, 26px);
}

/* ---------- 起点 ---------- */
.page-about .about-origin__grid {
  display: grid;
  gap: clamp(22px, 3.6vw, 44px);
}

.page-about .about-origin__main {
  max-width: 62ch;
}

.page-about .about-origin__aside {
  border-left: 2px solid var(--line-gold);
  padding: 2px 0 2px 18px;
}

.page-about .about-origin__year {
  margin: 0 0 8px;
  font-size: clamp(1.7rem, 5vw, 2.6rem);
  line-height: 1;
  letter-spacing: .06em;
  color: var(--gold);
}

.page-about .about-origin__note {
  margin: 0;
  font-size: 14px;
  color: var(--mist);
  line-height: 1.72;
}

/* ---------- 版本年轮 ---------- */
.page-about .about-track__head {
  max-width: 64ch;
  margin-bottom: clamp(26px, 4vw, 48px);
}

.page-about .about-timeline {
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, rgba(231, 184, 75, .6), rgba(231, 184, 75, .06));
}

.page-about .about-timeline__node {
  position: relative;
  padding: 0 0 clamp(28px, 4vw, 46px) 34px;
  scroll-margin-top: calc(var(--bar-h) + 24px);
}

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

.page-about .about-timeline__dot {
  position: absolute;
  left: -1px;
  top: 1px;
  width: 20px;
  height: 20px;
  display: grid;
  place-items: center;
  color: var(--gold);
  background: var(--ink);
  border-radius: 50%;
  transition: color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .about-timeline__node:hover .about-timeline__dot {
  color: var(--turq);
  transform: scale(1.12);
}

.page-about .about-timeline__body {
  display: grid;
  gap: 4px;
}

.page-about .about-timeline__main p {
  margin: 0;
  font-size: 15px;
}

.page-about .about-timeline__side {
  margin: 0;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--mist);
  white-space: nowrap;
}

.page-about .about-timeline__node:nth-child(even) .about-timeline__side {
  color: var(--turq);
}

/* ---------- 改版与旧入口 ---------- */
.page-about .about-renew__grid {
  display: grid;
  gap: clamp(24px, 3.8vw, 46px);
}

.page-about .about-renew__intro {
  max-width: 60ch;
}

.page-about .about-inline-link {
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid rgba(231, 184, 75, .5);
  padding-bottom: 1px;
  transition: border-bottom-width var(--dur) var(--ease);
}

.page-about .about-inline-link:hover,
.page-about .about-inline-link:focus-visible {
  border-bottom-width: 3px;
}

.page-about .about-renew__compare {
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  align-content: start;
}

.page-about .about-entry {
  padding: 14px 16px 15px;
  border-radius: var(--radius-s);
  border: 1px solid var(--line);
  background: var(--about-ink-wash);
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .about-entry:hover {
  border-color: var(--line-gold);
}

.page-about .about-entry--live:first-child {
  background: linear-gradient(150deg, rgba(47, 184, 166, .16), var(--about-ink-wash) 68%);
}

.page-about .about-entry__name {
  margin: 10px 0 4px;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 15px;
  color: var(--paper);
}

.page-about .about-entry__note {
  margin: 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}

.page-about .about-entry--legacy {
  border-style: dashed;
  border-color: var(--about-legacy);
  background:
    repeating-linear-gradient(135deg, rgba(165, 140, 115, .12) 0 6px, transparent 6px 12px),
    rgba(10, 18, 48, .62);
  outline: none;
}

.page-about .about-entry--legacy .about-entry__name {
  color: rgba(243, 233, 215, .58);
  font-weight: 500;
}

.page-about .about-entry--legacy .tag {
  opacity: .5;
  transition: opacity var(--dur) var(--ease);
}

.page-about .about-entry--legacy:hover .tag,
.page-about .about-entry--legacy:focus-visible .tag,
.page-about .about-entry--legacy:focus-within .tag {
  opacity: 1;
}

.page-about .about-entry--legacy:hover,
.page-about .about-entry--legacy:focus-visible {
  border-color: rgba(165, 140, 115, .78);
  transform: translateY(-1px);
}

.page-about .about-renew__fig {
  margin-top: clamp(24px, 4vw, 42px);
}

/* ---------- 服务原则 ---------- */
.page-about .about-principles__head {
  max-width: 56ch;
  margin-bottom: clamp(22px, 3.4vw, 38px);
}

.page-about .about-principle {
  border-top: 1px solid var(--line);
  padding-top: clamp(16px, 2.4vw, 24px);
}

.page-about .about-principle + .about-principle {
  margin-top: clamp(20px, 3vw, 34px);
}

.page-about .about-principle__num {
  display: inline-block;
  margin-bottom: 8px;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--gold);
}

.page-about .about-principle p {
  max-width: 46ch;
  font-size: 15px;
}

.page-about .about-principle:nth-child(2) .about-principle__num {
  color: var(--turq);
}

.page-about .about-principle:nth-child(3) .about-principle__num {
  color: var(--red);
}

/* ---------- 团队 ---------- */
.page-about .about-team__grid {
  display: grid;
  gap: clamp(26px, 4vw, 52px);
}

.page-about .about-team__intro {
  max-width: 58ch;
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(16px, 2.6vw, 26px);
}

.page-about .about-stat {
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-stat__num {
  display: block;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.2rem, 6.4vw, 3.9rem);
  line-height: 1;
  color: var(--gold);
  font-variant-numeric: tabular-nums;
}

.page-about .about-stat:nth-child(2) .about-stat__num {
  color: var(--turq);
}

.page-about .about-stat:nth-child(3) .about-stat__num {
  color: var(--paper);
}

.page-about .about-stat:nth-child(4) .about-stat__num {
  color: var(--red);
}

.page-about .about-stat__label {
  display: block;
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  line-height: 1.5;
  color: var(--mist);
}

.page-about .about-team__fig {
  margin-top: clamp(26px, 4vw, 46px);
}

/* ---------- 荣誉 ---------- */
.page-about .about-honors__head {
  max-width: 46ch;
  margin-bottom: clamp(18px, 3vw, 30px);
}

.page-about .about-honor-list {
  margin: 0 0 clamp(30px, 4.4vw, 52px);
  padding: 0;
  list-style: none;
}

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

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

.page-about .about-honor details {
  padding: clamp(14px, 2.2vw, 20px) 0;
}

.page-about .about-honor summary {
  display: flex;
  align-items: baseline;
  gap: 14px;
  cursor: pointer;
  list-style: none;
  color: var(--paper);
}

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

.page-about .about-honor summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--gold);
  transition: transform var(--dur) var(--ease);
}

.page-about .about-honor details[open] summary::after {
  content: "−";
}

.page-about .about-honor__year {
  flex: 0 0 auto;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--mist);
}

.page-about .about-honor__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.05rem, 2.2vw, 1.32rem);
  line-height: 1.4;
}

.page-about .about-honor details p {
  margin: 12px 0 0;
  max-width: 52ch;
  font-size: 14.5px;
  color: var(--about-body-dim);
}

/* ---------- 收尾 ---------- */
.page-about .about-outro {
  border-radius: var(--radius-l);
  padding: clamp(22px, 3.6vw, 40px);
  background:
    radial-gradient(circle at 92% 0%, rgba(231, 184, 75, .16), transparent 52%),
    linear-gradient(140deg, rgba(18, 28, 66, .92), rgba(5, 9, 22, .96));
  border: 1px solid var(--line-gold);
}

.page-about .about-outro h3 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.2rem, 2.6vw, 1.6rem);
  margin-bottom: 18px;
}

.page-about .about-outro__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-outro__links .btn {
  text-decoration: none;
}

/* ---------- 平板与桌面 ---------- */
@media (min-width: 760px) {
  .page-about .about-timeline__body {
    grid-template-columns: minmax(0, 1fr) 132px;
    gap: 28px;
    align-items: start;
  }

  .page-about .about-timeline__side {
    padding-top: 4px;
    text-align: right;
  }

  .page-about .about-timeline__node {
    padding-left: 40px;
  }

  .page-about .about-timeline::before {
    left: 9px;
  }

  .page-about .about-stats {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: 18px 20px;
  }

  .page-about .about-stat:nth-child(1) {
    grid-column: 1 / span 5;
  }

  .page-about .about-stat:nth-child(2) {
    grid-column: 7 / span 4;
    margin-top: 28px;
  }

  .page-about .about-stat:nth-child(3) {
    grid-column: 2 / span 4;
  }

  .page-about .about-stat:nth-child(4) {
    grid-column: 8 / span 5;
    margin-top: 20px;
  }
}

@media (min-width: 900px) {
  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, .7fr);
    align-items: start;
  }

  .page-about .about-origin__aside {
    padding-left: 24px;
    margin-top: 6px;
  }

  .page-about .about-renew__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.02fr);
    align-items: start;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, .95fr);
    align-items: start;
  }

  .page-about .about-principle:nth-child(2) {
    margin-left: 9%;
  }

  .page-about .about-principle:nth-child(3) {
    margin-left: 18%;
  }

  .page-about .about-principle p {
    max-width: 42ch;
  }
}

@media (min-width: 1120px) {
  .page-about .about-hero__frame {
    padding: clamp(36px, 3.4vw, 56px);
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about .about-entry,
  .page-about .about-timeline__dot,
  .page-about .about-hero__scale,
  .page-about .about-hero__scale::before,
  .page-about .about-honor summary::after,
  .page-about .about-inline-link {
    transition: none;
  }

  .page-about .about-entry--legacy:hover,
  .page-about .about-entry--legacy:focus-visible,
  .page-about .about-timeline__node:hover .about-timeline__dot {
    transform: none;
  }
}