.page-about {
  --about-pad: clamp(20px, 4vw, 48px);
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 22px;
  font-size: 13px;
  letter-spacing: 0.05em;
  color: var(--text-dim);
}

.page-about .breadcrumb a {
  color: var(--text-dim);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 200ms var(--ease), border-color 200ms var(--ease);
}

.page-about .breadcrumb a:hover {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-about .breadcrumb [aria-hidden="true"] {
  color: var(--gold-deep);
}

.page-about .breadcrumb [aria-current="page"] {
  color: var(--gold);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-top: var(--about-pad);
}

.page-about .about-hero__frame {
  padding: clamp(26px, 4.4vw, 64px);
  background-image:
    radial-gradient(130% 100% at 92% -10%, rgba(91, 63, 209, 0.30), transparent 60%),
    linear-gradient(165deg, rgba(232, 180, 74, 0.08), transparent 58%);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 34px;
}

.page-about .about-hero__title {
  margin: 12px 0 20px;
  font-size: clamp(38px, 7.4vw, 86px);
  line-height: 1.02;
  letter-spacing: -0.02em;
}

.page-about .about-hero__lead {
  max-width: 46ch;
  margin: 0 0 28px;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
  border-radius: 4px;
  overflow: hidden;
}

.page-about .about-stat {
  padding: 18px 16px;
  background: var(--panel);
}

.page-about .about-stat dd {
  margin: 0;
}

.page-about .about-stat .stat-value {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(26px, 4.6vw, 38px);
  font-weight: 700;
  line-height: 1;
  color: var(--gold);
}

.page-about .about-stat .stat-label {
  display: block;
  margin-top: 8px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--text-dim);
}

/* ---------- 奶油底文字色彩 ---------- */
.page-about .section--cream {
  color: var(--text-brown);
}

.page-about .section--cream .h2,
.page-about .section--cream .h3 {
  color: var(--text-brown);
}

.page-about .section--cream .lead,
.page-about .section--cream .prose,
.page-about .section--cream .section-title {
  color: var(--text-brown-dim);
}

.page-about .section--cream .h2.section-title {
  color: var(--text-brown);
}

.page-about .section--cream .eyebrow {
  color: var(--gold-deep);
}

/* ---------- 服务对象 ---------- */
.page-about .about-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 36px;
}

.page-about .about-split__text .h2 {
  margin: 10px 0 20px;
}

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

.page-about .about-scenes {
  list-style: none;
  margin: 32px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-scene {
  display: grid;
  gap: 10px;
  padding: 16px 0 0;
  border-top: 1px solid var(--line-cream);
}

.page-about .about-scene p {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-brown-dim);
}

/* ---------- 栏目演进 ---------- */
.page-about .about-evolution__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 40px;
  margin-top: clamp(32px, 5vw, 56px);
}

.page-about .about-tl-list {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0 0 0 34px;
}

.page-about .about-tl-list::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, var(--gold) 0%, var(--line) 100%);
}

.page-about .about-tl-item {
  position: relative;
  padding-bottom: 42px;
}

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

.page-about .about-tl-item::before {
  content: "";
  position: absolute;
  left: -35px;
  top: 6px;
  width: 13px;
  height: 13px;
  box-sizing: border-box;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--gold-deep);
  transition: border-color 220ms var(--ease), box-shadow 220ms var(--ease);
}

.page-about .about-tl-item:hover::before,
.page-about .about-tl-item:focus-within::before {
  border-color: var(--cyan);
  box-shadow: 0 0 0 5px rgba(53, 224, 214, 0.14);
}

.page-about .about-tl-year {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--gold);
}

.page-about .about-tl-title {
  margin: 0 0 10px;
  font-size: clamp(19px, 2.4vw, 24px);
}

.page-about .about-tl-text {
  margin: 0;
  max-width: 46ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--text-dim);
}

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

/* ---------- 改版方式 ---------- */
.page-about .about-steps {
  list-style: none;
  margin: clamp(28px, 4vw, 48px) 0 0;
  padding: 0;
  display: grid;
  gap: 30px;
}

.page-about .about-step {
  padding-top: 18px;
  border-top: 2px solid var(--brown);
}

.page-about .about-step__num {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--gold-deep);
}

.page-about .about-step .h3 {
  margin: 0 0 10px;
  font-size: clamp(18px, 2.3vw, 22px);
}

.page-about .about-step p {
  margin: 0;
  max-width: 44ch;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--text-brown-dim);
}

/* ---------- 团队 ---------- */
.page-about .about-team__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 36px;
}

.page-about .about-team__text .h2 {
  margin: 10px 0 20px;
}

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

.page-about .about-roles {
  list-style: none;
  margin: 32px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
  border-radius: 4px;
  overflow: hidden;
}

.page-about .about-role {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  grid-template-areas:
    "num name"
    "num desc";
  column-gap: 16px;
  row-gap: 4px;
  align-items: center;
  padding: 16px 18px;
  background: var(--panel);
}

.page-about .about-role__num {
  grid-area: num;
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  color: var(--gold);
}

.page-about .about-role__name {
  grid-area: name;
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
}

.page-about .about-role__desc {
  grid-area: desc;
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-dim);
}

/* ---------- 服务能力 ---------- */
.page-about .about-reach__stats {
  list-style: none;
  margin: clamp(28px, 4vw, 44px) 0 clamp(32px, 5vw, 52px);
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 26px 24px;
}

.page-about .about-reach__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(30px, 5vw, 46px);
  font-weight: 700;
  line-height: 1;
  color: var(--gold-deep);
}

.page-about .about-reach__label {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  letter-spacing: 0.05em;
  color: var(--text-brown-dim);
}

.page-about .about-reach__cols {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
  padding-top: clamp(24px, 3.5vw, 40px);
  border-top: 1px solid var(--line-cream);
}

.page-about .about-reach__col .h3 {
  margin: 0 0 12px;
  font-size: clamp(18px, 2.3vw, 22px);
}

/* ---------- 延伸阅读 ---------- */
.page-about .about-next__panel {
  padding: clamp(28px, 4.4vw, 56px);
  background:
    radial-gradient(110% 130% at 0% 0%, rgba(91, 63, 209, 0.28), transparent 62%),
    var(--panel);
  border: 1px solid var(--line);
  border-radius: 4px;
  box-shadow: var(--shadow-1);
}

.page-about .about-next__panel .h2 {
  margin: 0 0 14px;
}

.page-about .about-next__panel .lead {
  margin: 0 0 30px;
  max-width: 52ch;
}

.page-about .about-next__links {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-about .about-next__link {
  display: grid;
  gap: 6px;
  padding: 18px 20px;
  text-decoration: none;
  background: rgba(13, 14, 19, 0.55);
  border: 1px solid var(--line);
  border-radius: 3px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%);
  transition: transform 220ms var(--ease), border-color 220ms var(--ease), background-color 220ms var(--ease);
}

.page-about .about-next__link:hover,
.page-about .about-next__link:focus-visible {
  transform: translateX(4px);
  border-color: var(--cyan);
  background: rgba(26, 29, 39, 0.9);
}

.page-about .about-next__link-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--gold);
}

.page-about .about-next__link-desc {
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--text-dim);
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-about .about-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 34px 48px;
  }

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

  .page-about .about-reach__cols {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 40px;
  }

  .page-about .about-next__links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.9fr);
    gap: clamp(36px, 5vw, 72px);
    align-items: end;
  }

  .page-about .about-stats {
    align-self: end;
  }
}

@media (min-width: 1024px) {
  .page-about .about-split {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: clamp(40px, 6vw, 88px);
    align-items: start;
  }

  .page-about .about-evolution__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.7fr);
    gap: clamp(40px, 6vw, 88px);
    align-items: start;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.82fr);
    gap: clamp(40px, 6vw, 80px);
    align-items: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-tl-item::before,
  .page-about .about-next__link {
    transition: none;
  }

  .page-about .about-next__link:hover,
  .page-about .about-next__link:focus-visible {
    transform: none;
  }
}