.page-about {
  position: relative;
  background: var(--bs-cream);
  color: var(--bs-black);
  font-family: var(--bs-font-body);
  overflow-x: clip;
}

.page-about img {
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about__crumb-wrap {
  padding-top: clamp(16px, 3vw, 28px);
}

.page-about__crumb-wrap .bs-breadcrumb {
  font-size: 13px;
  color: var(--bs-green);
}

.page-about__crumb-wrap .bs-breadcrumb a {
  color: var(--bs-green);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.page-about__crumb-wrap .bs-breadcrumb a:hover {
  border-bottom-color: var(--bs-orange);
}

/* 01 品牌故事 */
.page-about__story {
  position: relative;
  overflow: hidden;
  background: var(--bs-cream);
}

.page-about__story::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 52%;
  height: 100%;
  background: linear-gradient(145deg, var(--bs-green) 0%, var(--bs-green-deep) 100%);
  clip-path: polygon(16% 0, 100% 0, 100% 100%, 0 100%);
  z-index: 0;
}

.page-about__story::after {
  content: '';
  position: absolute;
  top: 12%;
  right: -20px;
  width: 160px;
  height: 160px;
  border: 2px solid rgba(212, 175, 55, 0.24);
  border-radius: 50%;
  z-index: 0;
}

@media (max-width: 879px) {
  .page-about__story::before,
  .page-about__story::after {
    display: none;
  }
}

.page-about__story-grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 28px;
  padding-top: clamp(28px, 5vw, 72px);
  padding-bottom: clamp(40px, 6vw, 84px);
}

@media (min-width: 880px) {
  .page-about__story-grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: center;
    min-height: 620px;
  }
}

.page-about__story-copy {
  max-width: 640px;
}

.page-about__story-chapter {
  display: inline-block;
  margin-bottom: 16px;
}

.page-about__story-title {
  font-family: var(--bs-font-head);
  font-size: clamp(34px, 6vw, 64px);
  line-height: 1.02;
  letter-spacing: 0.01em;
  color: var(--bs-green);
  position: relative;
  display: inline-block;
  padding-bottom: 6px;
  border-bottom: 4px solid var(--bs-gold);
  margin: 0;
}

.page-about__story-sub {
  display: block;
  margin-top: 14px;
  font-size: 16px;
  font-weight: 700;
  color: var(--bs-black);
  letter-spacing: 0.02em;
}

.page-about__story p {
  margin: 16px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(20, 20, 20, 0.82);
  max-width: 58ch;
}

.page-about__story-index {
  margin-top: 26px;
  padding: 18px 20px;
  background: rgba(255, 255, 255, 0.88);
  border-left: 3px solid var(--bs-orange);
  box-shadow: 0 6px 18px rgba(8, 42, 31, 0.08);
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  max-width: 360px;
}

.page-about__story-index a {
  color: var(--bs-green);
  text-decoration: none;
  font-size: 13px;
  font-weight: 600;
  padding: 4px 0;
  border-bottom: 1px dashed rgba(11, 61, 46, 0.18);
  display: flex;
  justify-content: space-between;
  gap: 12px;
}

.page-about__story-index a:hover {
  color: var(--bs-orange);
  border-bottom-color: var(--bs-orange);
}

.page-about__story-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about__story-media {
  margin: 0;
  align-self: center;
  position: relative;
  background: var(--bs-green);
  border: 2px solid var(--bs-green);
  padding: 14px;
  box-shadow: 8px 10px 0 rgba(255, 107, 53, 0.18);
  transform: rotate(-1deg);
}

.page-about__story-media img {
  display: block;
  width: 100%;
  border: 2px solid var(--bs-gold);
}

.page-about__story-caption {
  margin-top: 12px;
  font-size: 12px;
  color: var(--bs-cream);
  text-align: right;
  letter-spacing: 0.04em;
}

.page-about__story-since {
  position: absolute;
  left: 4px;
  top: 14%;
  writing-mode: vertical-rl;
  font-family: var(--bs-font-head);
  font-size: 16px;
  letter-spacing: 0.52em;
  color: var(--bs-green);
  opacity: 0.34;
  text-transform: uppercase;
  z-index: 2;
  display: none;
}

@media (min-width: 880px) {
  .page-about__story-since {
    display: block;
    left: -6px;
  }
}

/* 02 发展历程 */
.page-about__journey {
  position: relative;
  overflow: hidden;
  background:
    repeating-linear-gradient(135deg, rgba(255, 255, 255, 0.055) 0 1px, transparent 1px 22px),
    linear-gradient(180deg, var(--bs-green) 0%, var(--bs-green-deep) 100%);
  color: var(--bs-cream);
  padding-top: clamp(40px, 6vw, 76px);
  padding-bottom: clamp(48px, 7vw, 88px);
}

.page-about__journey::after {
  content: '';
  position: absolute;
  right: -120px;
  bottom: -120px;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  border: 2px dashed rgba(212, 175, 55, 0.25);
}

.page-about__journey .bs-container {
  position: relative;
  z-index: 1;
}

.page-about__journey-big {
  position: absolute;
  right: -1rem;
  top: 4rem;
  font-family: var(--bs-font-mono);
  font-size: clamp(120px, 18vw, 240px);
  font-weight: 800;
  line-height: 1;
  color: rgba(247, 243, 232, 0.05);
  pointer-events: none;
  z-index: 0;
}

.page-about__journey-label {
  background: var(--bs-cream);
  display: inline-block;
  padding: 14px 18px;
  border: 1px solid var(--bs-gray);
  border-left: 4px solid var(--bs-gold);
}

.page-about__timeline {
  list-style: none;
  margin: 42px 0 0;
  padding: 0;
  position: relative;
  display: grid;
  gap: 22px;
}

.page-about__timeline::before {
  content: '';
  position: absolute;
  left: 9px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  background: linear-gradient(180deg, var(--bs-gold), rgba(212, 175, 55, 0.16));
}

.page-about__milestone {
  position: relative;
  padding-left: 40px;
  margin: 0;
}

.page-about__milestone-node {
  position: absolute;
  left: 0;
  top: 8px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--bs-green-deep);
  border: 3px solid var(--bs-gold);
  box-shadow: 0 0 0 5px rgba(212, 175, 55, 0.18);
  display: grid;
  place-items: center;
}

.page-about__milestone-node::after {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--bs-orange);
}

.page-about__milestone-year {
  display: block;
  font-family: var(--bs-font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  font-weight: 700;
  color: var(--bs-gold);
  margin-bottom: 6px;
  text-transform: uppercase;
}

.page-about__milestone-card {
  background: rgba(247, 243, 232, 0.96);
  border: 1px solid var(--bs-gray);
  border-left: 4px solid var(--bs-gold);
  padding: 16px 16px 14px;
  box-shadow: 0 8px 22px rgba(0, 0, 0, 0.22);
}

.page-about__milestone-card:hover {
  transform: translate(2px, -2px);
  transition: transform 0.3s var(--bs-ease);
}

.page-about__milestone-card summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  font-family: var(--bs-font-head);
  font-size: 17px;
  line-height: 1.35;
  color: var(--bs-green);
  font-weight: 900;
}

.page-about__milestone-card summary::-webkit-details-marker {
  display: none;
}

.page-about__milestone-flag {
  flex: 0 0 auto;
  display: inline-grid;
  place-items: center;
  width: 26px;
  height: 26px;
  margin-top: 2px;
  border: 1px solid var(--bs-gold);
  border-radius: 50%;
  color: var(--bs-orange);
  font-family: var(--bs-font-mono);
  font-size: 15px;
  font-weight: 700;
  transition: transform 0.3s var(--bs-ease), background 0.3s var(--bs-ease);
}

.page-about__milestone-card[open] .page-about__milestone-flag {
  transform: rotate(45deg);
  background: var(--bs-gold);
  color: var(--bs-green);
}

.page-about__milestone-card p {
  margin: 12px 0 2px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--bs-black);
}

@media (min-width: 640px) {
  .page-about__milestone-card {
    padding: 20px 22px 18px;
  }
  .page-about__milestone-card summary {
    font-size: 18px;
  }
}

/* 03 数据服务能力 */
.page-about__capability {
  position: relative;
  background: var(--bs-cream);
  padding-top: clamp(44px, 6vw, 80px);
  padding-bottom: clamp(48px, 7vw, 88px);
}

.page-about__capability-metrics {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-top: 32px;
}

@media (min-width: 640px) {
  .page-about__capability-metrics {
    grid-template-columns: repeat(4, 1fr);
  }
}

.page-about__metric-card {
  padding: 18px 14px 14px;
  min-height: 146px;
  margin: 0;
}

.page-about__metric-num {
  display: block;
  font-family: var(--bs-font-mono);
  font-size: clamp(26px, 5vw, 38px);
  font-weight: 800;
  line-height: 1;
  color: var(--bs-green);
  letter-spacing: -0.04em;
}

.page-about__metric-label {
  display: block;
  margin-top: 10px;
  font-size: 13px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--bs-black);
}

.page-about__metric-note {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  line-height: 1.5;
  color: rgba(20, 20, 20, 0.68);
}

.page-about__capability-list {
  margin-top: 26px;
  padding: 20px 22px;
  background: var(--bs-white);
  border: 1px solid var(--bs-gray);
  border-left: 5px solid var(--bs-orange);
  font-size: 14px;
  line-height: 1.75;
  display: flex;
  gap: 10px;
  align-items: flex-start;
}

.page-about__capability-list::before {
  content: '';
  flex: 0 0 auto;
  width: 9px;
  height: 9px;
  margin-top: 0.55em;
  border-radius: 50%;
  background: var(--bs-data-green);
  box-shadow: 0 0 0 3px rgba(0, 230, 118, 0.16);
}

.page-about__capability-list strong {
  color: var(--bs-green);
}

.page-about__capability-chart {
  margin: 30px 0 0;
  background: var(--bs-green);
  padding: 12px;
  border: 2px solid var(--bs-gold);
}

.page-about__capability-chart img {
  display: block;
  width: 100%;
  background: var(--bs-green);
}

.page-about__capability-chart figcaption {
  padding-top: 10px;
  font-size: 12px;
  text-align: right;
  color: var(--bs-gold);
  letter-spacing: 0.04em;
}

/* 04 资质与认证 */
.page-about__credentials {
  background: var(--bs-gray);
  padding-top: clamp(40px, 6vw, 76px);
  padding-bottom: clamp(44px, 6vw, 76px);
}

.page-about__credentials-grid {
  display: grid;
  gap: 28px;
  align-items: start;
}

@media (min-width: 860px) {
  .page-about__credentials-grid {
    grid-template-columns: minmax(0, 1.2fr) 180px minmax(0, 1fr);
    align-items: center;
  }
}

.page-about__cred-list {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about__cred-list li {
  position: relative;
  padding-left: 22px;
  font-size: 14px;
  line-height: 1.5;
  color: var(--bs-black);
}

.page-about__cred-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 12px;
  height: 12px;
  background: var(--bs-gold);
  clip-path: polygon(50% 0, 100% 100%, 0 100%);
}

.page-about__seal {
  position: relative;
  width: 168px;
  height: 168px;
  margin: 0 auto;
  border-radius: 50%;
  background:
    radial-gradient(circle at 50% 50%, rgba(212, 175, 55, 0.12) 0%, transparent 56%),
    var(--bs-green);
  display: grid;
  place-items: center;
  border: 2px solid var(--bs-gold);
  box-shadow: 0 0 0 6px rgba(212, 175, 55, 0.14);
}

.page-about__seal::before {
  content: '';
  position: absolute;
  inset: 9px;
  border-radius: 50%;
  border: 2px dashed var(--bs-gold);
}

.page-about__seal::after {
  content: '';
  position: absolute;
  inset: 18px;
  border-radius: 50%;
  border: 1px solid rgba(212, 175, 55, 0.4);
}

.page-about__seal-inner {
  position: relative;
  text-align: center;
  display: grid;
  gap: 6px;
  padding: 12px;
}

.page-about__seal-inner strong {
  font-family: var(--bs-font-head);
  font-size: 26px;
  font-weight: 800;
  color: var(--bs-gold);
  line-height: 1;
}

.page-about__seal-inner span {
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--bs-cream);
  text-indent: 0.24em;
}

.page-about__credentials-media {
  margin: 0;
}

.page-about__credentials-media img {
  display: block;
  width: 100%;
  border: 2px solid var(--bs-green);
  box-shadow: 8px 10px 0 rgba(212, 175, 55, 0.22);
}

.page-about__credentials-caption {
  margin-top: 12px;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: rgba(20, 20, 20, 0.7);
  text-align: right;
}

/* 05 合作生态 */
.page-about__partners {
  background: var(--bs-cream);
  padding-top: clamp(44px, 6vw, 80px);
  padding-bottom: clamp(48px, 7vw, 80px);
}

.page-about__partners-intro {
  max-width: 72ch;
  font-size: 15px;
  line-height: 1.75;
  margin: 20px 0 0;
  color: rgba(20, 20, 20, 0.82);
}

.page-about__partner-tracks {
  display: grid;
  gap: 16px;
  margin-top: 28px;
}

@media (min-width: 760px) {
  .page-about__partner-tracks {
    grid-template-columns: repeat(3, 1fr);
  }
}

.page-about__partner-track {
  background: var(--bs-white);
  border-top: 5px solid var(--bs-green);
  box-shadow: 0 6px 18px rgba(8, 42, 31, 0.08);
  padding: 18px 18px 20px;
  position: relative;
  transition: transform 0.3s var(--bs-ease), box-shadow 0.3s var(--bs-ease);
}

.page-about__partner-track:nth-child(2) {
  border-top-color: var(--bs-gold);
}

.page-about__partner-track:nth-child(3) {
  border-top-color: var(--bs-orange);
}

.page-about__partner-track:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 26px rgba(8, 42, 31, 0.12);
}

.page-about__partner-track h3 {
  font-family: var(--bs-font-head);
  font-size: 17px;
  color: var(--bs-green);
  margin: 10px 0 8px;
}

.page-about__partner-track p {
  font-size: 13.5px;
  line-height: 1.65;
  color: rgba(20, 20, 20, 0.78);
  margin: 0;
}

.page-about__partners-foot {
  margin-top: 32px;
  padding: 18px 20px;
  border: 1px solid var(--bs-gray);
  border-left: 4px solid var(--bs-gold);
  background: var(--bs-white);
  font-size: 13.5px;
  line-height: 1.7;
}

.page-about__partners-foot a {
  color: var(--bs-orange);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition: none !important;
    transform: none !important;
  }
}