.page-about {
  --about-card: #FBF9F3;
  --about-shadow: 0 20px 44px -34px rgba(11, 14, 18, 0.55);
  --about-hair: rgba(143, 166, 184, 0.28);
  background: var(--pearl);
  color: var(--ink);
  font-family: var(--font-text);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  background: var(--deep-base);
  color: var(--pearl);
  padding: clamp(104px, 15vw, 168px) 0 clamp(48px, 7vw, 84px);
}

.page-about .about-hero-bg {
  position: absolute;
  inset: 0;
  z-index: -2;
  width: 100%;
  height: 100%;
  max-width: none;
  object-fit: cover;
  opacity: 0.52;
}

.page-about .about-hero-veil {
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(180deg, rgba(6, 23, 41, 0.94) 0%, rgba(10, 35, 64, 0.74) 46%, rgba(6, 23, 41, 0.97) 100%),
    linear-gradient(14deg, rgba(217, 166, 46, 0.12) 0%, rgba(217, 166, 46, 0) 58%);
}

.page-about .about-hero .breadcrumb {
  color: var(--steel);
  font-size: 12px;
  letter-spacing: 0.1em;
}

.page-about .about-hero .breadcrumb a {
  color: var(--gold-light);
  text-decoration: none;
}

.page-about .about-hero .breadcrumb a:hover {
  color: var(--gold);
}

.page-about .about-hero .eyebrow {
  margin: 28px 0 0;
  color: var(--gold);
}

.page-about .about-hero-grid {
  display: grid;
  gap: clamp(28px, 4vw, 52px);
  margin-top: 18px;
}

.page-about .about-hero h1 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 200;
  font-size: clamp(31px, 5.1vw, 60px);
  line-height: 1.14;
  letter-spacing: 0.004em;
  color: var(--pearl);
  max-width: 15em;
}

.page-about .about-hero-lede {
  margin: 22px 0 0;
  max-width: 620px;
  font-size: clamp(15px, 1.55vw, 17px);
  line-height: 1.85;
  color: var(--halo);
}

.page-about .about-hero-panel {
  align-self: end;
  background: rgba(20, 64, 94, 0.46);
  border: 1px solid var(--line);
  border-top: 2px solid var(--gold);
  clip-path: var(--chamfer);
  padding: 24px 24px 20px;
}

.page-about .about-panel-label {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-about .about-fact {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 14px;
  padding: 11px 0;
  border-top: 1px solid var(--line);
}

.page-about .about-fact:first-of-type {
  border-top: 0;
  padding-top: 0;
}

.page-about .about-fact-key {
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--steel);
}

.page-about .about-fact-val {
  font-size: 15px;
  color: var(--pearl);
  text-align: right;
}

.page-about .about-fact-val.mono {
  letter-spacing: 0.02em;
}

@media (min-width: 880px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
  }
  .page-about .about-hero-panel {
    margin-bottom: 6px;
  }
}

/* ---------- 公共区块 ---------- */

.page-about .about-band {
  position: relative;
  padding: clamp(52px, 7.5vw, 104px) 0;
}

.page-about .about-band--pearl {
  background: var(--pearl);
  color: var(--ink);
}

.page-about .about-band--deep {
  background: linear-gradient(158deg, var(--deep-sea) 0%, var(--deep-base) 100%);
  color: var(--halo);
}

.page-about .about-band--tidal {
  background: linear-gradient(180deg, var(--tidal) 0%, var(--deep-sea) 100%);
  color: var(--halo);
}

.page-about .about-band--wine {
  background: linear-gradient(200deg, var(--wine) 0%, #5A1E2B 100%);
  color: var(--halo);
}

.page-about .about-band--base {
  background: var(--deep-base);
  color: var(--halo);
}

.page-about .about-band--pearl .eyebrow {
  color: var(--gold-ink);
}

.page-about .about-band--deep .eyebrow,
.page-about .about-band--tidal .eyebrow,
.page-about .about-band--wine .eyebrow,
.page-about .about-band--base .eyebrow {
  color: var(--gold);
}

.page-about .about-h2 {
  margin: 14px 0 0;
  max-width: 20em;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(25px, 3.5vw, 42px);
  line-height: 1.24;
  letter-spacing: 0.006em;
}

.page-about .about-lede {
  margin: 18px 0 0;
  max-width: 640px;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(11, 14, 18, 0.72);
}

.page-about .about-lede--dark {
  color: var(--halo);
}

.page-about .about-prose {
  margin-top: 28px;
  max-width: 760px;
}

.page-about .about-prose p {
  margin: 0;
  font-size: 17px;
  line-height: 1.82;
  color: rgba(11, 14, 18, 0.82);
}

.page-about .about-prose p + p {
  margin-top: 18px;
}

.page-about .about-foot-note {
  margin: 30px 0 0;
  max-width: 720px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--halo);
}

.page-about .about-foot-note a {
  color: var(--gold-light);
  text-decoration: none;
  border-bottom: 1px solid rgba(240, 208, 138, 0.5);
}

.page-about .about-foot-note a:hover {
  color: var(--gold);
  border-bottom-color: var(--gold);
}

/* ---------- 团队分屏 ---------- */

.page-about .about-split {
  display: grid;
  gap: clamp(30px, 4.5vw, 54px);
  margin-top: 34px;
  align-items: start;
}

.page-about .about-roles {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-role {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 6px 16px;
  padding: 18px 0;
  border-top: 1px solid var(--line);
}

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

.page-about .about-role-num {
  font-size: 28px;
  line-height: 1;
  color: var(--gold);
  letter-spacing: -0.02em;
}

.page-about .about-role-name {
  align-self: center;
  font-size: 17px;
  font-weight: 500;
  color: var(--pearl);
}

.page-about .about-role-desc {
  grid-column: 2;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--steel);
}

.page-about .about-figure {
  margin: 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  clip-path: var(--chamfer-sm);
  object-fit: cover;
}

.page-about .about-side-note {
  margin: 20px 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--halo);
  border-left: 2px solid var(--gold);
  padding-left: 16px;
}

@media (min-width: 900px) {
  .page-about .about-split {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }
}

/* ---------- 发展时间线 ---------- */

.page-about .about-band-figure {
  margin: 30px 0 clamp(30px, 4vw, 46px);
}

.page-about .about-band-figure img {
  display: block;
  width: 100%;
  height: auto;
  clip-path: var(--chamfer-sm);
  object-fit: cover;
}

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

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 10px;
  bottom: 12px;
  width: 1px;
  background: linear-gradient(180deg, var(--gold) 0%, rgba(217, 166, 46, 0.16) 100%);
}

.page-about .about-tl-item {
  position: relative;
  padding: 0 0 26px 30px;
}

.page-about .about-tl-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 13px;
  height: 13px;
  border: 2px solid var(--gold);
  border-radius: 50%;
  background: var(--pearl);
  box-sizing: border-box;
}

.page-about .about-tl-year {
  display: block;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--gold-ink);
}

.page-about .about-tl-title {
  margin: 6px 0 0;
  font-size: 18px;
  font-weight: 500;
  line-height: 1.4;
  color: var(--ink);
}

.page-about .about-tl-sum {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(11, 14, 18, 0.7);
}

.page-about .about-tl-more {
  margin: 10px 0 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: rgba(11, 14, 18, 0.56);
  overflow: hidden;
  transition: max-height 380ms var(--ease), opacity 260ms linear;
}

@media (min-width: 860px) {
  .page-about .about-timeline::before {
    left: 96px;
  }
  .page-about .about-tl-item {
    display: grid;
    grid-template-columns: 96px minmax(0, 1fr);
    column-gap: 30px;
    padding: 0 0 34px 0;
  }
  .page-about .about-tl-item::before {
    left: 89px;
    top: 3px;
  }
  .page-about .about-tl-year {
    text-align: right;
    padding-top: 0;
    line-height: 1.5;
  }
  .page-about .about-tl-title {
    margin-top: 0;
  }
}

@media (hover: hover) and (min-width: 900px) {
  .page-about .about-tl-more {
    max-height: 0;
    opacity: 0;
    margin-top: 0;
  }
  .page-about .about-tl-item:hover .about-tl-more,
  .page-about .about-tl-item:focus-within .about-tl-more {
    max-height: 160px;
    opacity: 1;
    margin-top: 10px;
  }
}

/* ---------- 覆盖数字 ---------- */

.page-about .about-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 34px;
}

.page-about .about-metric {
  border-top: 2px solid var(--gold);
  padding: 18px 2px 6px;
}

.page-about .about-metric-num {
  display: block;
  font-size: clamp(30px, 4vw, 46px);
  line-height: 1;
  color: var(--gold);
  letter-spacing: -0.02em;
}

.page-about .about-metric-label {
  display: block;
  margin-top: 10px;
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--steel);
}

@media (min-width: 860px) {
  .page-about .about-metrics {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 24px;
  }
}

/* ---------- 质量标准 ---------- */

.page-about .about-qa {
  display: grid;
  gap: 18px;
  margin-top: 34px;
}

.page-about .about-qa-item {
  position: relative;
  background: var(--about-card);
  border-top: 3px solid var(--gold);
  clip-path: var(--chamfer-sm);
  box-shadow: var(--about-shadow);
  padding: 22px 22px 26px;
}

.page-about .about-qa-num {
  display: block;
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--gold-ink);
}

.page-about .about-qa-title {
  margin: 12px 0 0;
  font-size: 19px;
  font-weight: 500;
  line-height: 1.4;
  color: var(--ink);
}

.page-about .about-qa-item p {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(11, 14, 18, 0.72);
}

.page-about .about-qa-item a {
  color: var(--gold-ink);
  text-decoration: none;
  border-bottom: 1px solid rgba(122, 90, 18, 0.45);
}

.page-about .about-qa-item a:hover {
  color: var(--gold);
  border-bottom-color: var(--gold);
}

@media (min-width: 800px) {
  .page-about .about-qa {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px;
  }
}

/* ---------- 使用场景 ---------- */

.page-about .about-scenes {
  display: grid;
  gap: 18px;
  margin-top: 34px;
}

.page-about .about-scene {
  background: rgba(6, 23, 41, 0.34);
  border: 1px solid rgba(245, 241, 232, 0.16);
  clip-path: var(--chamfer-sm);
  padding: 24px 22px 28px;
}

.page-about .about-scene-title {
  margin: 0;
  font-size: 19px;
  font-weight: 500;
  line-height: 1.4;
  color: var(--gold-light);
}

.page-about .about-scene p {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--halo);
}

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

/* ---------- 入口链接 ---------- */

.page-about .about-cta-links {
  display: grid;
  gap: 14px;
  margin-top: 34px;
}

.page-about .about-cta-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--gold);
  clip-path: var(--chamfer-sm);
  text-decoration: none;
  color: var(--pearl);
  transition: background 260ms var(--ease), border-color 260ms var(--ease);
}

.page-about .about-cta-link:hover,
.page-about .about-cta-link:focus-visible {
  background: rgba(217, 166, 46, 0.12);
  border-color: var(--gold);
}

.page-about .about-cta-title {
  display: block;
  font-size: 16.5px;
  font-weight: 500;
  line-height: 1.4;
}

.page-about .about-cta-sub {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--steel);
}

.page-about .about-cta-arrow {
  flex: none;
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--gold);
  transition: transform 260ms var(--ease);
}

.page-about .about-cta-link:hover .about-cta-arrow,
.page-about .about-cta-link:focus-visible .about-cta-arrow {
  transform: translateX(5px);
}

@media (min-width: 760px) {
  .page-about .about-cta-links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-cta-link,
  .page-about .about-cta-arrow,
  .page-about .about-tl-more {
    transition: none;
  }
  .page-about .about-cta-link:hover .about-cta-arrow,
  .page-about .about-cta-link:focus-visible .about-cta-arrow {
    transform: none;
  }
}
</main>