.page-about {
  background: var(--clr-cream);
  color: var(--clr-ink);
  font-family: var(--font-body);
  line-height: 1.7;
  overflow-x: hidden;
}

/* 面包屑微调 */
.page-about .breadcrumb {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: var(--space-4) var(--content-pad) 0;
  font-size: var(--size-small);
  color: var(--clr-stone);
}

.page-about .breadcrumb a {
  color: var(--clr-azure);
  text-decoration: none;
  transition: color 0.25s ease;
}

.page-about .breadcrumb a:hover {
  color: var(--clr-terracotta);
}

/* ========== 首屏 / 品牌定位 ========== */
.page-about .about-hero {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: var(--space-6) var(--content-pad) var(--space-7);
}

.page-about .about-hero__inner {
  display: grid;
  gap: var(--space-6);
  align-items: center;
}

.page-about .about-hero__eyebrow,
.page-about .about-milestone__eyebrow,
.page-about .about-service__eyebrow,
.page-about .about-region__eyebrow {
  font-size: var(--size-small);
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--clr-terracotta);
  text-transform: uppercase;
  margin-bottom: var(--space-3);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.page-about .about-hero__eyebrow::before,
.page-about .about-milestone__eyebrow::before,
.page-about .about-service__eyebrow::before,
.page-about .about-region__eyebrow::before {
  content: "";
  width: 24px;
  height: 2px;
  background: var(--clr-loess);
  display: inline-block;
}

.page-about .about-hero h1 {
  font-family: var(--font-heading);
  font-size: var(--size-h1);
  font-weight: 900;
  line-height: 1.18;
  color: var(--clr-umber);
  margin-bottom: var(--space-5);
  letter-spacing: -0.01em;
}

.page-about .about-hero__lead {
  font-size: 1.0625rem;
  line-height: 1.9;
  color: var(--clr-stone);
  max-width: 36em;
  margin-bottom: var(--space-6);
  border-left: 4px solid var(--clr-loess);
  padding-left: var(--space-4);
}

.page-about .about-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-5) var(--space-6);
  border-top: 2px solid var(--clr-loess);
  padding-top: var(--space-5);
}

.page-about .about-hero__stat {
  display: flex;
  flex-direction: column;
}

.page-about .about-hero__stat-value {
  font-family: var(--font-heading);
  font-size: var(--size-h2);
  font-weight: 900;
  color: var(--clr-terracotta);
  line-height: 1;
}

.page-about .about-hero__stat-label {
  font-size: var(--size-xs);
  color: var(--clr-stone);
  margin-top: var(--space-2);
  letter-spacing: 0.04em;
}

.page-about .about-hero__visual {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  background: var(--clr-loess);
  position: relative;
}

.page-about .about-hero__visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(62, 39, 35, 0.12), transparent 55%);
  pointer-events: none;
}

.page-about .about-hero__visual img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
}

/* ========== 发展里程碑 ========== */
.page-about .about-milestone {
  background: var(--clr-white);
  padding: var(--space-7) var(--content-pad);
  position: relative;
}

.page-about .about-milestone::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    45deg,
    transparent 0,
    transparent 12px,
    rgba(160, 82, 45, 0.025) 12px,
    rgba(160, 82, 45, 0.025) 13px
  );
  pointer-events: none;
}

.page-about .about-milestone__head {
  max-width: 720px;
  margin: 0 auto var(--space-7);
  text-align: center;
}

.page-about .about-milestone__head h2,
.page-about .about-service__head h2,
.page-about .about-region__content h2 {
  font-family: var(--font-heading);
  font-size: var(--size-h2);
  font-weight: 900;
  color: var(--clr-umber);
  line-height: 1.25;
  margin-bottom: var(--space-4);
}

.page-about .about-milestone__head p:last-child,
.page-about .about-service__head > p:last-child {
  color: var(--clr-stone);
  font-size: var(--size-base);
  max-width: 46em;
  margin-left: auto;
  margin-right: auto;
}

.page-about .about-timeline {
  position: relative;
  max-width: 960px;
  margin: 0 auto;
  padding: 0;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 18px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(
    to bottom,
    var(--clr-terracotta) 0%,
    var(--clr-loess) 45%,
    var(--clr-moss) 100%
  );
  opacity: 0.55;
}

.page-about .about-timeline__item {
  position: relative;
  padding-left: 56px;
  margin-bottom: var(--space-6);
}

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

.page-about .about-timeline__node {
  position: absolute;
  left: 10px;
  top: 24px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--clr-terracotta);
  border: 4px solid var(--clr-cream);
  box-shadow: 0 0 0 2px var(--clr-terracotta);
  transition: transform 0.3s ease, box-shadow 0.3s ease, background 0.3s ease;
  z-index: 2;
}

.page-about .about-timeline__item:hover .about-timeline__node,
.page-about .about-timeline__node:focus-visible {
  transform: scale(1.3);
  background: var(--clr-moss);
  box-shadow: 0 0 0 4px rgba(107, 142, 35, 0.3);
  outline: none;
}

.page-about .about-timeline__card {
  background: var(--clr-cream);
  border: 1px solid rgba(112, 128, 144, 0.2);
  border-radius: var(--radius);
  padding: var(--space-4) var(--space-5);
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.3s ease, border-color 0.3s ease, transform 0.3s ease;
  position: relative;
}

.page-about .about-timeline__card::before {
  content: "";
  position: absolute;
  left: -10px;
  top: 22px;
  width: 20px;
  height: 20px;
  transform: rotate(45deg);
  background: var(--clr-cream);
  border-left: 1px solid rgba(112, 128, 144, 0.2);
  border-bottom: 1px solid rgba(112, 128, 144, 0.2);
}

.page-about .about-timeline__item:hover .about-timeline__card {
  box-shadow: var(--shadow-md);
  border-color: var(--clr-terracotta);
  transform: translateY(-3px);
}

.page-about .about-timeline__tag {
  display: inline-block;
  font-size: var(--size-xs);
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--clr-terracotta);
  background: rgba(160, 82, 45, 0.08);
  padding: 2px 10px;
  border-radius: 20px;
  margin-bottom: var(--space-2);
}

.page-about .about-timeline__card h3 {
  font-family: var(--font-heading);
  font-size: var(--size-h4);
  font-weight: 800;
  color: var(--clr-umber);
  margin-bottom: var(--space-2);
  line-height: 1.35;
}

.page-about .about-timeline__card p {
  font-size: var(--size-small);
  color: var(--clr-stone);
  line-height: 1.8;
  margin: 0;
}

.page-about .about-milestone__chart {
  max-width: 720px;
  margin: var(--space-7) auto 0;
  text-align: center;
}

.page-about .about-milestone__chart img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.page-about .about-milestone__chart figcaption {
  font-size: var(--size-xs);
  color: var(--clr-stone);
  margin-top: var(--space-2);
  font-style: italic;
}

/* ========== 服务能力 ========== */
.page-about .about-service {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: var(--space-7) var(--content-pad);
}

.page-about .about-service__head {
  margin-bottom: var(--space-6);
  max-width: 720px;
}

.page-about .about-service__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
}

.page-about .about-service__item {
  background: var(--clr-white);
  border: 1px solid rgba(112, 128, 144, 0.18);
  border-radius: var(--radius);
  padding: var(--space-5);
  position: relative;
  overflow: hidden;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.page-about .about-service__item::after {
  content: "";
  position: absolute;
  right: -24px;
  top: -24px;
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, transparent 60%, rgba(160, 82, 45, 0.08) 60%);
  border-radius: 50%;
  transition: transform 0.4s ease;
}

.page-about .about-service__item:hover {
  border-color: var(--clr-terracotta);
  box-shadow: var(--shadow-md);
}

.page-about .about-service__item:hover::after {
  transform: scale(1.3);
}

.page-about .about-service__num {
  font-family: var(--font-heading);
  font-size: var(--size-h3);
  font-weight: 900;
  color: var(--clr-loess);
  display: block;
  margin-bottom: var(--space-2);
  line-height: 1;
}

.page-about .about-service__item h3 {
  font-family: var(--font-heading);
  font-size: var(--size-h4);
  font-weight: 800;
  color: var(--clr-umber);
  margin-bottom: var(--space-3);
  line-height: 1.4;
}

.page-about .about-service__item p {
  font-size: var(--size-small);
  color: var(--clr-stone);
  line-height: 1.8;
  margin-bottom: var(--space-4);
}

.page-about .about-service__link {
  display: inline-block;
  font-size: var(--size-small);
  font-weight: 600;
  color: var(--clr-azure);
  text-decoration: none;
  position: relative;
  transition: color 0.25s ease;
}

.page-about .about-service__link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -3px;
  width: 100%;
  height: 2px;
  background: var(--clr-moss);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}

.page-about .about-service__link:hover {
  color: var(--clr-terracotta);
}

.page-about .about-service__link:hover::after {
  transform: scaleX(1);
}

/* ========== 地域基因 ========== */
.page-about .about-region {
  background: var(--clr-umber);
  padding: var(--space-7) var(--content-pad);
  color: var(--clr-cream);
}

.page-about .about-region__inner {
  max-width: var(--content-max);
  margin: 0 auto;
  display: grid;
  gap: var(--space-6);
  align-items: center;
}

.page-about .about-region__visual {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.page-about .about-region__visual img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
}

.page-about .about-region__content h2 {
  color: var(--clr-cream);
  margin-bottom: var(--space-4);
}

.page-about .about-region__content > p {
  color: rgba(245, 239, 230, 0.82);
  font-size: var(--size-base);
  line-height: 1.9;
  margin-bottom: var(--space-5);
  max-width: 40em;
}

.page-about .about-region__list {
  list-style: none;
  padding: 0;
  margin: 0 0 var(--space-5);
  border-top: 1px solid rgba(245, 239, 230, 0.15);
}

.page-about .about-region__list li {
  display: flex;
  gap: var(--space-3);
  padding: var(--space-3) 0;
  border-bottom: 1px solid rgba(245, 239, 230, 0.1);
  font-size: var(--size-small);
  color: rgba(245, 239, 230, 0.8);
}

.page-about .about-region__list li span {
  flex-shrink: 0;
  min-width: 6em;
  font-weight: 700;
  color: var(--clr-loess);
}

.page-about .about-region__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.page-about .about-region__actions .btn--ghost {
  border-color: rgba(245, 239, 230, 0.6);
  color: var(--clr-cream);
}

.page-about .about-region__actions .btn--ghost:hover {
  background: rgba(245, 239, 230, 0.12);
  border-color: var(--clr-cream);
}

/* ========== 相关入口 ========== */
.page-about .about-related {
  padding: var(--space-6) var(--content-pad);
  max-width: var(--content-max);
  margin: 0 auto;
}

.page-about .about-related__inner {
  border: 1px solid rgba(112, 128, 144, 0.2);
  border-radius: var(--radius);
  padding: var(--space-5);
  background: var(--clr-white);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.page-about .about-related__label {
  font-size: var(--size-xs);
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--clr-terracotta);
  margin: 0;
}

.page-about .about-related__links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-5);
}

.page-about .about-related__links a {
  color: var(--clr-ink);
  text-decoration: none;
  font-size: var(--size-small);
  font-weight: 600;
  padding: var(--space-1) 0;
  position: relative;
  transition: color 0.25s ease;
}

.page-about .about-related__links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 100%;
  height: 2px;
  background: var(--clr-moss);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}

.page-about .about-related__links a:hover {
  color: var(--clr-terracotta);
}

.page-about .about-related__links a:hover::after {
  transform: scaleX(1);
}

/* ========== 响应式布局 ========== */
@media (min-width: 768px) {
  .page-about .about-hero__inner {
    grid-template-columns: 1.15fr 0.85fr;
    gap: var(--space-7);
  }

  .page-about .about-service__grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-6);
  }

  .page-about .about-region__inner {
    grid-template-columns: 0.85fr 1.15fr;
    gap: var(--space-7);
  }

  .page-about .about-related__inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

@media (min-width: 1025px) {
  .page-about .about-timeline::before {
    left: 50%;
    transform: translateX(-50%);
    width: 3px;
  }

  .page-about .about-timeline__item {
    width: 50%;
    padding-left: 0;
    padding-right: 56px;
  }

  .page-about .about-timeline__item:nth-child(even) {
    margin-left: 50%;
    padding-right: 0;
    padding-left: 56px;
  }

  .page-about .about-timeline__node {
    left: auto;
    right: -9px;
  }

  .page-about .about-timeline__item:nth-child(even) .about-timeline__node {
    right: auto;
    left: -9px;
  }

  .page-about .about-timeline__card::before {
    left: auto;
    right: -10px;
    transform: rotate(45deg);
    border-left: none;
    border-right: 1px solid rgba(112, 128, 144, 0.2);
  }

  .page-about .about-timeline__item:nth-child(even) .about-timeline__card::before {
    right: auto;
    left: -10px;
    border-right: none;
    border-left: 1px solid rgba(112, 128, 144, 0.2);
  }

  .page-about .about-milestone {
    padding-left: var(--content-pad);
    padding-right: var(--content-pad);
  }

  .page-about .about-region {
    background-image: linear-gradient(
      90deg,
      var(--clr-umber),
      var(--clr-umber) 68%,
      var(--clr-terracotta) 68%,
      var(--clr-terracotta)
    );
  }
}