.page-about {
  --about-axis-x: 9px;
  background: var(--ry-cream);
  color: var(--ry-ink);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
}

.page-about .about-wrap {
  box-sizing: border-box;
  width: 100%;
  max-width: 800px;
  margin: 0 auto;
  padding: 18px 20px 72px;
}

.page-about .about-wrap *,
.page-about .about-wrap *::before,
.page-about .about-wrap *::after {
  box-sizing: border-box;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: 24px 0 6px;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    90deg,
    rgba(27, 108, 140, 0.08) 0 1px,
    transparent 1px 88px
  );
  pointer-events: none;
}

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

.page-about .about-kicker {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin: 0;
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.3em;
  color: var(--ry-rock);
}

.page-about .about-kicker__no {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  color: var(--ry-gold);
}

.page-about .about-hero__title {
  margin: 14px 0 18px;
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 6vw, 3.6rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: 0.06em;
  color: var(--ry-deep);
}

.page-about .about-hero__lede {
  margin: 0;
  max-width: 60ch;
  font-size: 1rem;
  line-height: 1.9;
  color: var(--ry-ink);
}

.page-about .about-strip {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 28px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .about-strip__cell {
  background: var(--ry-snow);
  padding: 14px 12px 16px;
}

.page-about .about-strip__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.45rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--ry-primary);
}

.page-about .about-strip__label {
  display: block;
  margin-top: 6px;
  font-size: 0.74rem;
  line-height: 1.5;
  letter-spacing: 0.08em;
  color: var(--ry-rock);
}

/* ---------- 章节索引 ---------- */
.page-about .about-toc {
  margin-top: 26px;
  padding: 18px 0 20px;
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-toc__label {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.3em;
  color: var(--ry-rock);
}

.page-about .about-toc ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px 14px;
}

.page-about .about-toc a {
  display: flex;
  align-items: baseline;
  gap: 7px;
  padding-bottom: 2px;
  font-size: 0.86rem;
  line-height: 1.45;
  color: var(--ry-ink);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-about .about-toc a:hover,
.page-about .about-toc a:focus-visible {
  color: var(--ry-primary);
  border-bottom-color: var(--ry-gold);
}

.page-about .about-toc__no {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--ry-gold);
}

/* ---------- 通用章节 ---------- */
.page-about .about-sec {
  padding: 48px 0 6px;
  margin-top: 40px;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-sec:first-of-type {
  border-top: 0;
  margin-top: 34px;
  padding-top: 0;
}

.page-about .about-sec__no {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.24em;
  color: var(--ry-gold);
}

.page-about .about-sec__title {
  margin: 10px 0 0;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: clamp(1.35rem, 3.6vw, 1.95rem);
  line-height: 1.35;
  letter-spacing: 0.1em;
  color: var(--ry-deep);
}

.page-about .about-sec__lede {
  margin: 14px 0 0;
  max-width: 58ch;
  font-size: 0.98rem;
  line-height: 1.9;
  color: var(--ry-ink);
}

.page-about .about-p {
  margin: 16px 0 0;
  font-size: 0.95rem;
  line-height: 1.9;
  color: var(--ry-ink);
}

.page-about .about-link {
  color: var(--ry-primary);
  text-decoration: none;
  border-bottom: 1px solid var(--ry-gold-soft);
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  color: var(--ry-gold);
  border-bottom-color: var(--ry-gold);
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 24px 0 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: 2px;
  -webkit-clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}

.page-about .about-figure__caption {
  margin-top: 10px;
  font-size: 0.78rem;
  line-height: 1.7;
  letter-spacing: 0.04em;
  color: var(--ry-rock);
}

/* ---------- 三条主线 ---------- */
.page-about .about-axes {
  display: grid;
  gap: 26px;
  margin-top: 28px;
}

.page-about .about-axis {
  position: relative;
  padding: 2px 0 2px 20px;
  border-left: 2px solid var(--ry-primary);
}

.page-about .about-axis__no {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.16em;
  color: var(--ry-gold);
}

.page-about .about-axis h3 {
  margin: 8px 0 0;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 1.08rem;
  line-height: 1.5;
  letter-spacing: 0.04em;
  color: var(--ry-deep);
}

.page-about .about-axis .about-p {
  margin-top: 10px;
  font-size: 0.92rem;
}

/* ---------- 认证体系 ---------- */
.page-about .about-verify {
  margin-top: 26px;
  padding: 26px 18px 34px;
  background: var(--ry-deep);
  color: var(--ry-snow);
  -webkit-clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
}

.page-about .about-seals {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px;
}

.page-about .about-seal {
  padding: 14px 14px 16px;
  border: 1px solid rgba(242, 210, 139, 0.3);
  background: rgba(252, 250, 245, 0.03);
  -webkit-clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 0 100%);
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 0 100%);
  transition: border-color 0.25s ease, background 0.25s ease;
}

.page-about .about-seal:hover,
.page-about .about-seal:focus-within {
  border-color: var(--ry-gold);
  background: rgba(217, 164, 65, 0.12);
}

.page-about .about-seal__mark {
  display: block;
  color: var(--ry-gold);
}

.page-about .about-seal__name {
  margin: 10px 0 0;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 0.92rem;
  letter-spacing: 0.08em;
  color: var(--ry-snow);
}

.page-about .about-seal__desc {
  margin: 8px 0 0;
  font-size: 0.8rem;
  line-height: 1.75;
  color: rgba(252, 250, 245, 0.78);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
}

.page-about .tl-item {
  position: relative;
  padding-left: 30px;
  padding-bottom: 28px;
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  top: 8px;
  bottom: 0;
  left: var(--about-axis-x);
  width: 1px;
  background: var(--line-soft);
  transform: translateX(-50%);
}

.page-about .tl-item::after {
  content: "";
  position: absolute;
  top: 6px;
  left: var(--about-axis-x);
  width: 9px;
  height: 9px;
  background: var(--ry-cream);
  border: 2px solid var(--ry-primary);
  border-radius: 50%;
  transform: translateX(-50%);
}

.page-about .tl-item:last-child::before {
  bottom: auto;
  height: 14px;
}

.page-about .tl-year {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.92rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--ry-gold);
}

.page-about .tl-title {
  margin: 6px 0 0;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.06em;
  color: var(--ry-deep);
}

.page-about .tl-body .about-p {
  margin-top: 8px;
  font-size: 0.9rem;
}

/* ---------- 团队角色 ---------- */
.page-about .about-team {
  display: grid;
  gap: 14px;
  margin-top: 26px;
}

.page-about .about-role {
  padding: 18px 18px 22px;
  background: var(--ry-snow);
  box-shadow: var(--shadow-panel);
  border-top: 2px solid var(--ry-gold);
  -webkit-clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
}

.page-about .about-role__tag {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.22em;
  color: var(--ry-primary);
}

.page-about .about-role__name {
  margin: 8px 0 0;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 1.02rem;
  letter-spacing: 0.08em;
  color: var(--ry-deep);
}

.page-about .about-role__desc {
  margin: 8px 0 0;
  font-size: 0.86rem;
  line-height: 1.8;
  color: var(--ry-rock);
}

/* ---------- 持续服务 ---------- */
.page-about .about-commit {
  margin-top: 24px;
  padding: 20px 18px 22px;
  background: var(--ry-mist);
  border-left: 4px solid var(--ry-vermil);
}

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

.page-about .about-commit__list li {
  position: relative;
  padding-left: 18px;
  font-size: 0.9rem;
  line-height: 1.85;
  color: var(--ry-deep);
}

.page-about .about-commit__list li::before {
  content: "";
  position: absolute;
  top: 0.72em;
  left: 0;
  width: 7px;
  height: 2px;
  background: var(--ry-vermil);
}

.page-about .about-cta {
  margin-top: 28px;
  padding-top: 22px;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-cta__text {
  margin: 0 0 16px;
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--ry-ink);
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-wrap {
    padding: 26px 32px 88px;
  }

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

  .page-about .about-toc ul {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-team {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
  }

  .page-about .about-verify {
    padding: 32px 28px 40px;
  }
}

@media (min-width: 860px) {
  .page-about .about-wrap {
    max-width: 1040px;
    padding: 32px 48px 104px;
  }

  .page-about .about-axes {
    gap: 34px;
    margin-top: 34px;
  }

  .page-about .about-axis {
    max-width: 720px;
    padding-left: 26px;
  }

  .page-about .about-axis:nth-of-type(2) {
    margin-left: 56px;
  }

  .page-about .about-axis:nth-of-type(3) {
    margin-left: 112px;
  }

  .page-about .about-toc ul {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .page-about .about-toc a {
    font-size: 0.8rem;
  }

  .page-about .about-sec {
    padding-top: 60px;
    margin-top: 52px;
  }

  .page-about .about-figure {
    margin-top: 30px;
  }

  .page-about .about-timeline {
    margin-top: 32px;
  }

  .page-about .tl-item {
    display: grid;
    grid-template-columns: 96px minmax(0, 1fr);
    column-gap: 40px;
    padding-left: 0;
    padding-bottom: 34px;
  }

  .page-about .tl-item::before {
    left: 116px;
  }

  .page-about .tl-item::after {
    left: 116px;
    width: 11px;
    height: 11px;
  }

  .page-about .tl-year {
    position: sticky;
    top: 28px;
    align-self: start;
    text-align: right;
    padding-right: 0;
    font-size: 1rem;
  }

  .page-about .tl-body {
    padding-top: 2px;
  }

  .page-about .about-commit {
    padding: 26px 28px 28px;
  }

  .page-about .about-commit__list {
    gap: 14px;
  }
}

@media (min-width: 1080px) {
  .page-about .about-hero__lede {
    font-size: 1.05rem;
  }

  .page-about .about-sec__lede {
    font-size: 1.02rem;
  }

  .page-about .about-p {
    font-size: 0.98rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-toc a,
  .page-about .about-seal,
  .page-about .about-link {
    transition: none;
  }
}