.page-about {
  background: var(--paper);
  color: var(--charcoal);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-about .about-h2 {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(1.6rem, 3.4vw, 2.5rem);
  line-height: 1.25;
  letter-spacing: 0.01em;
  margin: 0.7rem 0 0;
}

.page-about .eyebrow {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  margin: 0;
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumbs-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55rem;
  margin: 0 0 1.6rem;
  padding: 0;
  font-size: 0.8rem;
  letter-spacing: 0.06em;
}

.page-about .breadcrumbs-item {
  color: rgba(251, 248, 242, 0.62);
}

.page-about .breadcrumbs-item + .breadcrumbs-item::before {
  content: "/";
  margin-right: 0.55rem;
  color: rgba(242, 169, 59, 0.7);
}

.page-about .breadcrumbs-link {
  color: rgba(251, 248, 242, 0.86);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}

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

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(2rem, 5vw, 3rem) 0 clamp(2.75rem, 7vw, 5rem);
  background:
    radial-gradient(120% 90% at 8% -20%, rgba(200, 69, 31, 0.55), transparent 58%),
    radial-gradient(85% 80% at 92% 4%, rgba(46, 42, 92, 0.7), transparent 62%),
    var(--ink);
  color: var(--mist);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  left: -12%;
  bottom: -40%;
  width: 68%;
  aspect-ratio: 1;
  background: var(--fire-soft);
  border-radius: 50%;
  transform: rotate(16deg);
  filter: blur(46px);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 42%;
  height: 4px;
  background: var(--fire);
  transform: skewX(-24deg);
  transform-origin: right top;
}

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

.page-about .about-hero .eyebrow {
  color: var(--gold);
}

.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2rem, 6.2vw, 4rem);
  line-height: 1.02;
  letter-spacing: -0.04em;
  margin: 1rem 0 0;
  max-width: 20ch;
  transform: skewX(-1.6deg);
}

.page-about .about-lede {
  margin: 1.4rem 0 0;
  max-width: 36rem;
  font-size: clamp(0.98rem, 1.5vw, 1.08rem);
  line-height: 1.85;
  letter-spacing: 0.02em;
  color: rgba(251, 248, 242, 0.86);
}

.page-about .about-figures {
  list-style: none;
  margin: 2.4rem 0 0;
  padding: 1.5rem 0 0;
  border-top: 1px solid rgba(201, 191, 175, 0.28);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.2rem 1rem;
}

.page-about .about-figure {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  min-width: 0;
}

.page-about .about-figure-num {
  font-family: var(--font-mono);
  font-size: clamp(1.35rem, 3.4vw, 1.95rem);
  line-height: 1.1;
  letter-spacing: 0.02em;
  color: var(--gold);
}

.page-about .about-figure-label {
  font-size: 0.78rem;
  line-height: 1.55;
  letter-spacing: 0.04em;
  color: rgba(251, 248, 242, 0.7);
}

/* ---------- 演进路径 ---------- */
.page-about .about-road {
  padding: clamp(2.75rem, 7vw, 5.5rem) 0;
  background: var(--paper);
}

.page-about .about-road-grid {
  display: grid;
  gap: 2.5rem;
}

.page-about .about-road-rail .eyebrow {
  color: var(--red);
}

.page-about .year-index {
  list-style: none;
  margin: 1.6rem 0 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-about .year-link {
  display: grid;
  grid-template-columns: 4.6rem minmax(0, 1fr);
  align-items: baseline;
  gap: 0.6rem;
  padding: 0.7rem 0.6rem 0.7rem 1rem;
  border-left: 2px solid var(--warm);
  color: var(--charcoal);
  text-decoration: none;
  transition: border-color 0.2s var(--ease), background-color 0.2s var(--ease), transform 0.2s var(--ease);
}

.page-about .year-link-num {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  letter-spacing: 0.06em;
  color: var(--red);
}

.page-about .year-link-label {
  font-size: 0.86rem;
  line-height: 1.5;
  letter-spacing: 0.03em;
  color: rgba(18, 20, 23, 0.76);
}

.page-about .year-link:hover,
.page-about .year-link:focus-visible {
  border-left-color: var(--jade);
  background: linear-gradient(90deg, rgba(47, 182, 166, 0.14), transparent 72%);
  transform: translateX(4px);
}

.page-about .year-link:hover .year-link-num,
.page-about .year-link:focus-visible .year-link-num {
  color: var(--jade);
}

.page-about .year-link:focus-visible {
  outline: 2px solid var(--jade);
  outline-offset: 3px;
}

.page-about .about-road-blocks {
  position: relative;
  display: grid;
  gap: 2rem;
  padding-left: 1.9rem;
}

.page-about .about-road-blocks::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--red), var(--gold) 46%, rgba(201, 191, 175, 0.45));
}

.page-about .road-block {
  position: relative;
  min-width: 0;
  padding: 0 0 0.4rem;
}

.page-about .road-block::before {
  content: "";
  position: absolute;
  left: -1.9rem;
  top: 0.5rem;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--fire);
  box-shadow: 0 0 0 3px rgba(244, 239, 230, 1), 0 0 0 5px rgba(200, 69, 31, 0.22);
  transition: transform 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.page-about .road-block:hover::before {
  transform: scale(1.28);
  box-shadow: 0 0 0 3px rgba(244, 239, 230, 1), 0 0 0 6px rgba(47, 182, 166, 0.4);
}

.page-about .road-year {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  letter-spacing: 0.14em;
  color: var(--red);
  margin: 0;
}

.page-about .road-title {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(1.15rem, 2.2vw, 1.45rem);
  line-height: 1.35;
  letter-spacing: 0.01em;
  margin: 0.4rem 0 0.7rem;
}

.page-about .road-text {
  margin: 0;
  max-width: 40rem;
  font-size: 0.95rem;
  line-height: 1.85;
  letter-spacing: 0.02em;
  color: rgba(18, 20, 23, 0.82);
}

.page-about .road-tag {
  display: inline-block;
  margin-top: 0.9rem;
  padding: 0.22rem 0.62rem;
  border: 1px solid rgba(110, 31, 43, 0.42);
  color: var(--wine);
  background: rgba(110, 31, 43, 0.06);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
}

.page-about .road-figure {
  margin: 0.6rem 0 0;
}

.page-about .figure-media {
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--ink);
  box-shadow: var(--shadow-sheet);
}

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

.page-about .figure-caption {
  margin-top: 0.7rem;
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  line-height: 1.6;
  color: rgba(18, 20, 23, 0.6);
}

/* ---------- 四组能力 ---------- */
.page-about .about-caps {
  position: relative;
  padding: clamp(2.75rem, 7vw, 5.5rem) 0;
  background:
    radial-gradient(80% 60% at 100% 0%, rgba(110, 31, 43, 0.5), transparent 60%),
    var(--ink);
  color: var(--mist);
}

.page-about .about-caps .eyebrow {
  color: var(--gold);
}

.page-about .caps-intro {
  margin: 1.1rem 0 0;
  max-width: 44rem;
  font-size: 0.96rem;
  line-height: 1.85;
  letter-spacing: 0.02em;
  color: rgba(251, 248, 242, 0.8);
}

.page-about .caps-grid {
  list-style: none;
  margin: 2.2rem 0 0;
  padding: 0;
  display: grid;
  gap: 1.4rem;
}

.page-about .cap {
  position: relative;
  min-width: 0;
  padding: 1.3rem 1.2rem 1.4rem;
  background: rgba(251, 248, 242, 0.05);
  border: 1px solid var(--line-dark);
  border-top: 2px solid rgba(242, 169, 59, 0.55);
  transition: transform 0.22s var(--ease), border-color 0.22s var(--ease), background-color 0.22s var(--ease);
}

.page-about .cap:hover,
.page-about .cap:focus-within {
  transform: translateY(-4px);
  border-top-color: var(--jade);
  background: rgba(251, 248, 242, 0.09);
}

.page-about .cap-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-about .cap-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--jade);
  box-shadow: 0 0 0 3px rgba(47, 182, 166, 0.22);
}

.page-about .cap-title {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 700;
  line-height: 1.4;
  margin: 0.65rem 0 0.55rem;
  color: var(--mist);
}

.page-about .cap-text {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.82;
  letter-spacing: 0.02em;
  color: rgba(251, 248, 242, 0.76);
}

.page-about .caps-figure {
  margin: 2.2rem 0 0;
}

.page-about .about-caps .figure-caption {
  color: rgba(251, 248, 242, 0.6);
}

/* ---------- 更新节奏 ---------- */
.page-about .about-flow {
  padding: clamp(2.75rem, 7vw, 5.5rem) 0;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}

.page-about .about-flow .eyebrow {
  color: var(--indigo);
}

.page-about .flow-lede {
  margin: 1rem 0 0;
  max-width: 46rem;
  font-size: 0.95rem;
  line-height: 1.85;
  letter-spacing: 0.02em;
  color: rgba(18, 20, 23, 0.78);
}

.page-about .flow-list {
  list-style: none;
  margin: 2.2rem 0 0;
  padding: 0;
  display: grid;
  gap: 1.5rem;
  counter-reset: flow;
}

.page-about .flow-step {
  position: relative;
  min-width: 0;
  padding: 1.35rem 1.2rem;
  background: var(--mist);
  border: 1px solid var(--line);
  border-left: 3px solid var(--indigo);
  box-shadow: var(--shadow-sheet);
  transition: border-left-color 0.2s var(--ease), transform 0.2s var(--ease);
}

.page-about .flow-step:hover {
  border-left-color: var(--jade);
  transform: translateY(-3px);
}

.page-about .flow-num {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  letter-spacing: 0.08em;
  color: rgba(46, 42, 92, 0.55);
}

.page-about .flow-title {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-weight: 700;
  margin: 0.5rem 0 0.55rem;
}

.page-about .flow-text {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.82;
  letter-spacing: 0.02em;
  color: rgba(18, 20, 23, 0.78);
}

.page-about .flow-link,
.page-about .principles-link {
  margin: 1.6rem 0 0;
}

.page-about .text-link {
  display: inline-block;
  color: var(--wine);
  text-decoration: none;
  font-size: 0.9rem;
  letter-spacing: 0.03em;
  border-bottom: 1px solid rgba(110, 31, 43, 0.45);
  padding-bottom: 2px;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

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

.page-about .text-link:focus-visible {
  outline: 2px solid var(--jade);
  outline-offset: 3px;
}

/* ---------- 服务原则 ---------- */
.page-about .about-principles {
  padding: clamp(2.75rem, 7vw, 5.5rem) 0;
  background: linear-gradient(180deg, var(--paper) 0%, #EDE5D8 100%);
}

.page-about .about-principles .eyebrow {
  color: var(--red);
}

.page-about .principle-list {
  list-style: none;
  margin: 2.2rem 0 0;
  padding: 0;
  display: grid;
  gap: 1.6rem;
}

.page-about .principle {
  min-width: 0;
  padding-top: 1rem;
  border-top: 2px solid var(--charcoal);
}

.page-about .principle-num {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  letter-spacing: 0.12em;
  color: var(--red);
}

.page-about .principle-title {
  font-family: var(--font-serif);
  font-size: clamp(1.05rem, 2vw, 1.3rem);
  font-weight: 700;
  line-height: 1.4;
  margin: 0.55rem 0 0.6rem;
}

.page-about .principle-text {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.85;
  letter-spacing: 0.02em;
  color: rgba(18, 20, 23, 0.78);
}

/* ---------- 认证与办公 ---------- */
.page-about .about-close {
  position: relative;
  padding: clamp(2.75rem, 7vw, 5.5rem) 0 clamp(2.5rem, 6vw, 4.5rem);
  background:
    radial-gradient(70% 50% at 0% 0%, rgba(200, 69, 31, 0.4), transparent 62%),
    var(--charcoal);
  color: var(--mist);
}

.page-about .about-close::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 38%;
  height: 3px;
  background: var(--fire);
}

.page-about .about-close .eyebrow {
  color: var(--gold);
}

.page-about .close-grid {
  display: grid;
  gap: 2rem;
  margin-top: 1.8rem;
}

.page-about .close-text {
  margin: 0;
  max-width: 42rem;
  font-size: 0.95rem;
  line-height: 1.85;
  letter-spacing: 0.02em;
  color: rgba(251, 248, 242, 0.82);
}

.page-about .cert-list {
  list-style: none;
  margin: 1.6rem 0 0;
  padding: 0;
  border-top: 1px solid var(--line-dark);
}

.page-about .cert-item {
  display: grid;
  gap: 0.25rem;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--line-dark);
}

.page-about .cert-key {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-about .cert-val {
  font-size: 0.9rem;
  line-height: 1.7;
  letter-spacing: 0.02em;
  color: rgba(251, 248, 242, 0.88);
}

.page-about .cert-val.num {
  font-family: var(--font-mono);
  letter-spacing: 0.06em;
  color: var(--mist);
}

.page-about .cert-figure {
  margin: 1.8rem 0 0;
}

.page-about .about-close .figure-caption {
  color: rgba(251, 248, 242, 0.58);
}

.page-about .close-side {
  align-self: start;
  padding: 1.5rem 1.3rem 1.6rem;
  border-top: 3px solid var(--jade);
}

.page-about .close-side-title {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-weight: 700;
  margin: 0 0 1rem;
  color: var(--charcoal);
}

.page-about .office-list {
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.95rem;
}

.page-about .office-item {
  min-width: 0;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--line);
}

.page-about .office-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.page-about .office-key {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--wine);
}

.page-about .office-val {
  margin: 0.24rem 0 0;
  font-size: 0.9rem;
  line-height: 1.7;
  letter-spacing: 0.02em;
  color: rgba(18, 20, 23, 0.84);
  overflow-wrap: anywhere;
}

.page-about .office-val.num {
  font-family: var(--font-mono);
  font-size: 1rem;
  letter-spacing: 0.06em;
  color: var(--charcoal);
}

.page-about .office-note {
  margin: 1.1rem 0 1.2rem;
  font-size: 0.84rem;
  line-height: 1.75;
  letter-spacing: 0.02em;
  color: rgba(18, 20, 23, 0.68);
}

.page-about .close-side .btn {
  width: 100%;
  text-align: center;
}

.page-about .about-next {
  margin-top: 2.6rem;
  padding-top: 1.6rem;
  border-top: 1px solid var(--line-dark);
}

.page-about .next-title {
  margin: 0 0 1rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-about .next-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-figures {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.4rem 1.2rem;
  }

  .page-about .cert-item {
    grid-template-columns: 8.5rem minmax(0, 1fr);
    align-items: baseline;
    gap: 1rem;
  }

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

@media (min-width: 720px) {
  .page-about .about-figures {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .page-about .caps-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.6rem 1.5rem;
  }

  .page-about .cap:nth-child(even) {
    transform: translateY(1.4rem);
  }

  .page-about .cap:nth-child(even):hover,
  .page-about .cap:nth-child(even):focus-within {
    transform: translateY(0.9rem);
  }

  .page-about .principle-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.4rem 2rem;
  }

  .page-about .close-side .btn {
    width: auto;
    display: inline-block;
  }
}

@media (min-width: 960px) {
  .page-about .about-road-grid {
    grid-template-columns: 300px minmax(0, 1fr);
    gap: 4rem;
    align-items: start;
  }

  .page-about .about-road-rail {
    position: sticky;
    top: 6.5rem;
  }

  .page-about .about-road-blocks {
    gap: 2.6rem;
  }

  .page-about .road-block:nth-child(even) {
    margin-left: clamp(0rem, 3vw, 2.6rem);
  }

  .page-about .close-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: 3rem;
  }

  .page-about .caps-grid {
    gap: 1.8rem 2rem;
  }
}

@media (min-width: 1180px) {
  .page-about .about-hero h1 {
    max-width: 22ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .year-link,
  .page-about .cap,
  .page-about .flow-step,
  .page-about .road-block::before {
    transition: none;
  }

  .page-about .year-link:hover,
  .page-about .cap:hover,
  .page-about .cap:nth-child(even),
  .page-about .cap:nth-child(even):hover,
  .page-about .flow-step:hover,
  .page-about .road-block:hover::before {
    transform: none;
  }
}