.page-about {
  --about-green: #1E8E5A;
  --about-red: #C0392B;
  --about-blue: #1C2A44;
  --about-warm: #FDF6E3;
  --about-card: #FFFDF7;
  --about-grey: #ECECEC;
  --about-ink: #222222;
  --about-yellow: #F1C40F;
  --about-serif: Georgia, "Times New Roman", "Songti SC", "SimSun", serif;
  --about-font-head: "Arial Black", "Helvetica Neue", "PingFang SC", "Microsoft YaHei", sans-serif;
  --about-font-data: "Courier New", "Lucida Console", monospace;
}

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

.page-about .ok-breadcrumb {
  padding-top: 32px;
}

.page-about-head {
  display: grid;
  gap: 32px;
  padding: 40px 0 32px;
  position: relative;
}

.page-about-head::before {
  content: "";
  position: absolute;
  right: -12px;
  top: 24px;
  width: 96px;
  height: 96px;
  background: linear-gradient(135deg, rgba(30, 142, 90, 0.08), rgba(192, 57, 43, 0.06));
  border-radius: 50%;
  pointer-events: none;
}

.page-about-head-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
}

.page-about-head-period {
  font-family: var(--about-font-data);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--about-ink);
  border: 2px solid var(--about-red);
  border-radius: 999px;
  padding: 4px 14px;
  line-height: 1.4;
}

.page-about-head .ok-page-title {
  max-width: 960px;
  margin: 18px 0 0;
  font-size: clamp(26px, 5vw, 42px);
  line-height: 1.18;
  color: var(--about-ink);
  font-family: var(--about-font-head);
}

.page-about-head .ok-page-lead {
  max-width: 660px;
  margin: 18px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--about-ink);
  opacity: 0.85;
  font-family: var(--about-font-data);
}

.page-about-head-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin: 0;
}

.page-about-head-stat {
  background: var(--about-card);
  border-radius: 16px;
  padding: 18px 16px;
  border-left: 4px solid var(--about-green);
  box-shadow: 0 6px 18px rgba(28, 42, 68, 0.07);
}

.page-about-stat-num {
  font-family: var(--about-font-data);
  font-size: 30px;
  font-weight: 800;
  color: var(--about-green);
  line-height: 1.1;
  margin: 0;
}

.page-about-stat-label {
  font-size: 13px;
  color: var(--about-ink);
  opacity: 0.75;
  margin: 6px 0 0;
}

.page-about-story {
  padding: 8px 0 56px;
}

.page-about-story-grid {
  display: grid;
  gap: 32px;
  margin-top: 36px;
}

.page-about-story-copy p {
  font-family: var(--about-font-data);
  font-size: 15px;
  line-height: 1.85;
  color: var(--about-ink);
  margin: 0 0 16px;
}

.page-about-story-lead {
  font-size: 17px !important;
  font-weight: 700;
  color: var(--about-green) !important;
  border-left: 4px solid var(--about-red);
  padding-left: 16px;
}

.page-about-story-flow {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 28px 0;
  padding: 18px;
  background: linear-gradient(135deg, #FDF6E3, #FFF8EC);
  border-radius: 20px;
  border: 1px solid rgba(30, 142, 90, 0.16);
}

.page-about-flow-node {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #fff;
  border: 1px solid rgba(28, 42, 68, 0.12);
  border-radius: 999px;
  padding: 8px 16px;
  font-family: var(--about-font-data);
  font-size: 14px;
  color: var(--about-ink);
}

.page-about-flow-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--about-green);
  color: #fff;
  font-size: 12px;
  font-weight: 800;
}

.page-about-flow-arrow {
  color: var(--about-red);
  font-weight: 900;
  font-size: 18px;
}

.page-about-story-note {
  font-size: 13px;
  color: var(--about-ink);
  opacity: 0.7;
  border-top: 1px dashed rgba(28, 42, 68, 0.2);
  padding-top: 14px;
}

.page-about-story-media {
  border-radius: 24px;
  overflow: hidden;
  box-shadow: 0 14px 40px rgba(28, 42, 68, 0.14);
  transform: rotate(-1deg);
  align-self: center;
}

.page-about-story-media img,
.page-about-method-media img,
.page-about-team-media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about-media-caption {
  font-family: var(--about-font-data);
  font-size: 12px;
  color: var(--about-ink);
  opacity: 0.68;
  padding: 12px 4px 0;
  line-height: 1.6;
}

.page-about-method {
  position: relative;
  color: var(--about-warm);
  padding: 64px 0;
}

.page-about-method::after {
  content: "";
  position: absolute;
  bottom: 0;
  right: 0;
  width: 180px;
  height: 180px;
  background: radial-gradient(circle, rgba(241, 196, 15, 0.12), transparent 70%);
  pointer-events: none;
}

.page-about-method .ok-section-title,
.page-about-method .ok-section-kicker {
  color: var(--about-warm);
}

.page-about-method .ok-section-kicker {
  color: var(--about-yellow);
}

.page-about-method .ok-section-line {
  background-color: var(--about-yellow);
}

.page-about-method-intro {
  max-width: 760px;
  margin-top: 28px;
}

.page-about-method-intro p {
  font-family: var(--about-font-data);
  font-size: 15px;
  line-height: 1.85;
  color: rgba(253, 246, 227, 0.88);
  margin: 0;
}

.page-about-method-grid {
  display: grid;
  gap: 24px;
  margin-top: 36px;
}

.page-about-method-sources,
.page-about-method-pipeline {
  background: rgba(28, 42, 68, 0.55);
  border-radius: 22px;
  padding: 24px;
  border: 1px solid rgba(253, 246, 227, 0.12);
}

.page-about-method-sources h3,
.page-about-method-pipeline h3 {
  font-family: var(--about-font-head);
  font-size: 18px;
  color: var(--about-yellow);
  margin: 0 0 16px;
}

.page-about-method-sources ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about-method-sources li {
  font-family: var(--about-font-data);
  font-size: 14px;
  color: rgba(253, 246, 227, 0.88);
  padding-left: 18px;
  position: relative;
}

.page-about-method-sources li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--about-green);
}

.page-about-pipe-flow {
  display: grid;
  gap: 14px;
}

.page-about-pipe-step {
  background: rgba(253, 246, 227, 0.06);
  border-radius: 16px;
  padding: 16px;
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 4px 12px;
  align-items: center;
}

.page-about-pipe-num {
  grid-row: 1 / 3;
  font-family: var(--about-serif);
  font-size: 28px;
  font-weight: 700;
  color: var(--about-green);
  width: 34px;
}

.page-about-pipe-step strong {
  font-family: var(--about-font-head);
  font-size: 16px;
  color: var(--about-warm);
}

.page-about-pipe-step small {
  font-family: var(--about-font-data);
  font-size: 12px;
  color: rgba(253, 246, 227, 0.68);
}

.page-about-pipe-arrow {
  text-align: center;
  color: var(--about-red);
  font-size: 20px;
  font-weight: 900;
  line-height: 1;
}

.page-about-method-media {
  border-radius: 22px;
  overflow: hidden;
  box-shadow: 0 14px 34px rgba(0, 0, 0, 0.24);
}

.page-about-method-media .page-about-media-caption {
  color: rgba(253, 246, 227, 0.6);
}

.page-about-method-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}

.page-about-timeline {
  padding: 64px 0 40px;
}

.page-about-timeline-wrap {
  margin-top: 40px;
  position: relative;
}

.page-about-milestone {
  display: grid;
  gap: 14px;
  padding: 28px 0;
  border-top: 1px dashed rgba(28, 42, 68, 0.18);
}

.page-about-milestone:first-child {
  border-top: none;
}

.page-about-milestone-year {
  font-family: var(--about-serif);
  font-size: 52px;
  font-weight: 700;
  color: var(--about-green);
  line-height: 1;
  letter-spacing: 0.02em;
}

.page-about-milestone-body {
  min-width: 0;
}

.page-about-milestone-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.page-about-milestone-head h3 {
  font-family: var(--about-font-head);
  font-size: 20px;
  color: var(--about-ink);
  margin: 0;
}

.page-about-milestone-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--about-grey);
  border: none;
  border-radius: 999px;
  padding: 8px 16px;
  font-family: var(--about-font-data);
  font-size: 13px;
  color: var(--about-ink);
  cursor: pointer;
  transition: background 0.2s ease;
}

.page-about-milestone-toggle:hover {
  background: #e0e0e0;
}

.page-about-milestone-toggle .ok-collapse-icon {
  display: inline-block;
  width: 14px;
  height: 14px;
  position: relative;
}

.page-about-milestone-toggle .ok-collapse-icon::before,
.page-about-milestone-toggle .ok-collapse-icon::after {
  content: "";
  position: absolute;
  background: var(--about-red);
  border-radius: 2px;
}

.page-about-milestone-toggle .ok-collapse-icon::before {
  width: 14px;
  height: 2px;
  left: 0;
  top: 6px;
}

.page-about-milestone-toggle .ok-collapse-icon::after {
  width: 2px;
  height: 14px;
  left: 6px;
  top: 0;
}

.page-about-milestone-body .ok-collapse-body {
  margin-top: 14px;
  padding: 16px;
  background: var(--about-card);
  border-radius: 16px;
  border-left: 4px solid var(--about-red);
}

.page-about-milestone-body .ok-collapse-body p {
  font-family: var(--about-font-data);
  font-size: 14px;
  line-height: 1.8;
  color: var(--about-ink);
  margin: 0;
}

.page-about-team {
  position: relative;
  color: var(--about-warm);
  padding: 64px 0;
}

.page-about-team::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 160px;
  height: 160px;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.08), transparent 70%);
  pointer-events: none;
}

.page-about-team .ok-section-title,
.page-about-team .ok-section-kicker {
  color: var(--about-warm);
}

.page-about-team .ok-section-kicker {
  color: var(--about-yellow);
}

.page-about-team .ok-section-line {
  background-color: var(--about-yellow);
}

.page-about-team-grid {
  display: grid;
  gap: 24px;
  margin-top: 36px;
}

.page-about-team-departments,
.page-about-team-credentials {
  background: rgba(253, 246, 227, 0.07);
  border-radius: 22px;
  padding: 24px;
  border: 1px solid rgba(253, 246, 227, 0.14);
}

.page-about-team-departments h3,
.page-about-team-credentials h3 {
  font-family: var(--about-font-head);
  font-size: 18px;
  color: var(--about-yellow);
  margin: 0 0 16px;
}

.page-about-team-departments ul,
.page-about-team-credentials ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about-team-departments li,
.page-about-team-credentials li {
  font-family: var(--about-font-data);
  font-size: 14px;
  line-height: 1.6;
  color: rgba(253, 246, 227, 0.88);
  padding-left: 20px;
  position: relative;
}

.page-about-team-departments li::before,
.page-about-team-credentials li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.5em;
  width: 9px;
  height: 9px;
  border-radius: 3px;
  transform: rotate(45deg);
  background: var(--about-green);
}

.page-about-team-credentials li::before {
  background: var(--about-red);
}

.page-about-team-credentials li strong {
  color: var(--about-warm);
}

.page-about-team-icp {
  display: inline-block;
  margin-top: 20px;
  background: var(--about-yellow);
  color: var(--about-blue);
  font-family: var(--about-font-data);
  font-size: 13px;
  font-weight: 700;
  border-radius: 999px;
  padding: 8px 18px;
  letter-spacing: 0.03em;
}

.page-about-team-media {
  border-radius: 22px;
  overflow: hidden;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.18);
  align-self: end;
}

.page-about-team-media .page-about-media-caption {
  color: rgba(253, 246, 227, 0.68);
}

.page-about-links {
  padding: 56px 0 72px;
}

.page-about-links h2 {
  font-family: var(--about-font-head);
  font-size: 24px;
  color: var(--about-ink);
  margin: 0;
}

.page-about-links-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.page-about-links .ok-btn {
  border-radius: 999px;
  padding: 10px 22px;
  font-family: var(--about-font-data);
  font-size: 14px;
}

@media (min-width: 680px) {
  .page-about-head {
    grid-template-columns: 1fr 300px;
    align-items: end;
    gap: 48px;
  }

  .page-about-head-stats {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-about-story-grid {
    grid-template-columns: 1fr 1fr;
    align-items: center;
  }

  .page-about-method-grid {
    grid-template-columns: 280px 1fr;
  }

  .page-about-method-media {
    grid-column: 1 / -1;
    max-width: 600px;
  }

  .page-about-team-grid {
    grid-template-columns: 1fr 1fr;
    align-items: start;
  }

  .page-about-team-media {
    grid-column: 1 / -1;
    max-width: 340px;
  }
}

@media (min-width: 900px) {
  .page-about-head {
    grid-template-columns: 1fr 340px;
    padding: 56px 0 44px;
    gap: 64px;
  }

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

  .page-about-story {
    padding: 16px 0 72px;
  }

  .page-about-milestone {
    grid-template-columns: 220px 1fr;
    gap: 40px;
    padding: 36px 0;
    align-items: start;
  }

  .page-about-milestone-year {
    font-size: 68px;
    text-align: right;
    position: relative;
    top: 4px;
  }

  .page-about-team-grid {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 32px;
  }

  .page-about-team-media {
    grid-column: auto;
    max-width: 340px;
    justify-self: end;
  }

  .page-about-pipe-flow {
    grid-template-columns: 1fr 20px 1fr 20px 1fr;
    gap: 8px;
    align-items: center;
  }

  .page-about-pipe-arrow {
    text-align: center;
  }
}