.page-about {
  --about-head-skew: -2deg;
  --about-num-skew: -8deg;
  --about-num-size: 64px;
  --about-soft-shadow: 8px 8px 0 var(--shadow);
  overflow-x: hidden;
  background: var(--cream);
  color: var(--ink);
}

/* ===== Hero ===== */
.page-about-hero {
  position: relative;
  padding: calc(var(--header-h) + 44px) 0 56px;
  background: var(--cream);
  border-bottom: 3px solid var(--ink);
  overflow: hidden;
}
.page-about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(35, 31, 27, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(35, 31, 27, 0.04) 1px, transparent 1px);
  background-size: 28px 28px;
  pointer-events: none;
}
.page-about-hero::after {
  content: "";
  position: absolute;
  left: -20px;
  bottom: 18px;
  width: 260px;
  height: 8px;
  background: linear-gradient(90deg, var(--orange) 0 66%, var(--ink) 66% 100%);
  transform: skew(-20deg);
}
.page-about-hero .container {
  position: relative;
  z-index: 1;
}
.page-about-hero .breadcrumb {
  margin: 0 0 28px;
}
.page-about-hero h1 {
  font-family: var(--font-head);
  font-size: clamp(42px, 9vw, 76px);
  line-height: 1.04;
  letter-spacing: -1.5px;
  margin: 0 0 20px;
  max-width: 760px;
  transform: skew(var(--about-head-skew));
  color: var(--ink);
}
.page-about-hero-lead {
  font-size: 18px;
  line-height: 1.65;
  max-width: 620px;
  color: var(--gray);
  margin: 0 0 32px;
}
.page-about-anchor-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 36px;
}
.page-about-anchor {
  font-family: var(--font-data);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-decoration: none;
  color: var(--ink);
  background: var(--panel);
  border: 1.5px solid var(--ink);
  padding: 9px 14px;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  transform: skew(-4deg);
  transition: background 0.2s var(--ease), color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}
.page-about-anchor:hover {
  background: var(--orange);
  color: #fff;
  box-shadow: 4px 4px 0 var(--shadow);
}
.page-about-anchor-num {
  color: var(--orange);
  transition: color 0.2s var(--ease);
}
.page-about-anchor:hover .page-about-anchor-num {
  color: var(--ink);
}
.page-about-hero-meta {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  max-width: 520px;
  border-top: 2px solid var(--ink);
  border-bottom: 2px solid var(--ink);
}
.page-about-hero-stat {
  padding: 16px 8px;
  text-align: center;
  border-left: 1px solid var(--ink);
}
.page-about-hero-stat:first-child {
  border-left: 0;
}
.page-about-hero-stat-num {
  display: block;
  font-family: var(--font-data);
  font-size: 30px;
  font-weight: 800;
  line-height: 1;
  color: var(--orange);
}
.page-about-hero-stat:last-child .page-about-hero-stat-num {
  color: var(--blue);
}
.page-about-hero-stat-label {
  display: block;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--gray);
  margin-top: 7px;
}

/* ===== 通用 Section ===== */
.page-about-section {
  position: relative;
  padding: 72px 0;
}
.page-about-section-num {
  display: block;
  font-family: var(--font-data);
  font-size: var(--about-num-size);
  font-weight: 800;
  line-height: 0.9;
  color: var(--orange);
  transform: skew(var(--about-num-skew));
  margin-bottom: 16px;
}
.page-about-section-num-light {
  color: var(--green);
}
.page-about-section-head h2,
.page-about-sync-head h2,
.page-about-team-head h2,
.page-about-duo-copy h2 {
  font-family: var(--font-head);
  font-size: clamp(28px, 5vw, 40px);
  line-height: 1.15;
  margin: 0 0 16px;
  color: var(--ink);
}
.page-about-lead {
  font-size: 17px;
  line-height: 1.7;
  color: var(--gray);
  max-width: 640px;
  margin: 0;
}

/* ===== 01 起点 ===== */
.page-about-origin {
  background: var(--cream);
}
.page-about-duo {
  display: grid;
  gap: 40px;
  align-items: center;
}
.page-about-duo-media {
  position: relative;
}
.page-about-media-frame {
  border: 2px solid var(--ink);
  box-shadow: var(--about-soft-shadow);
  transform: rotate(-1deg);
  background: var(--panel);
  overflow: hidden;
}
.page-about-media-frame img,
.page-about-milestone-media img,
.page-about-team-media img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}
.page-about-media-caption {
  font-family: var(--font-data);
  font-size: 12px;
  color: var(--gray);
  margin-top: 12px;
  letter-spacing: 0.03em;
}
.page-about-duo-copy p {
  font-size: 16px;
  line-height: 1.7;
  margin: 0 0 16px;
  color: var(--ink);
}
.page-about-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

/* ===== 02 里程碑 ===== */
.page-about-milestones {
  background: var(--blue);
  border-top: 3px solid var(--ink);
  border-bottom: 3px solid var(--ink);
}
.page-about-milestones .page-about-section-head h2 {
  color: var(--cream);
}
.page-about-milestones .page-about-lead {
  color: rgba(245, 239, 224, 0.8);
}
.page-about-milestone-layout {
  display: grid;
  gap: 48px;
  margin-top: 44px;
  align-items: start;
}
.page-about-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-about-node {
  position: relative;
  padding: 0 0 28px 30px;
  border-left: 2px solid var(--orange);
}
.page-about-node:last-child {
  border-left-color: rgba(232, 93, 42, 0.35);
}
.page-about-node::before {
  content: "";
  position: absolute;
  left: -8px;
  top: 6px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--cream);
  border: 3px solid var(--orange);
  transition: background 0.2s var(--ease), box-shadow 0.2s var(--ease);
}
.page-about-node:hover::before {
  background: var(--orange);
  box-shadow: 0 0 0 5px rgba(232, 93, 42, 0.25);
}
.page-about-node-current::before {
  background: var(--green);
  border-color: var(--green);
  box-shadow: 0 0 0 5px rgba(182, 255, 0, 0.2);
}
.page-about-node-card {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(245, 239, 224, 0.22);
  border-radius: var(--radius-md);
  padding: 18px 20px;
  transition: transform 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}
.page-about-node:hover .page-about-node-card {
  transform: translateX(5px);
  border-color: var(--green);
  background: rgba(255, 255, 255, 0.1);
}
.page-about-node-current .page-about-node-card {
  border-color: rgba(182, 255, 0, 0.45);
  background: rgba(182, 255, 0, 0.07);
}
.page-about-node-ver {
  font-family: var(--font-data);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--green);
  margin: 0 0 6px;
}
.page-about-node-card h3 {
  font-family: var(--font-head);
  font-size: 17px;
  margin: 0 0 6px;
  color: var(--cream);
}
.page-about-node-card p {
  font-size: 15px;
  line-height: 1.55;
  margin: 0;
  color: rgba(245, 239, 224, 0.76);
}
.page-about-milestone-media {
  border: 2px solid var(--cream);
  box-shadow: 10px 10px 0 rgba(35, 31, 27, 0.35);
  background: var(--ink);
  padding: 6px;
}
.page-about-milestone-media img {
  border: 1px solid rgba(245, 239, 224, 0.18);
}
.page-about-milestone-media .page-about-media-caption {
  color: rgba(245, 239, 224, 0.66);
}

/* ===== 03 数据同步 ===== */
.page-about-sync {
  background: var(--cream);
}
.page-about-sync-head {
  margin-bottom: 38px;
}
.page-about-sync-wrap {
  position: relative;
}
.page-about-sync-panel {
  position: relative;
  background: var(--blue);
  color: var(--cream);
  border-radius: var(--radius-lg);
  padding: 34px 26px;
  border: 2px solid var(--ink);
  box-shadow: 12px 12px 0 var(--shadow);
  overflow: hidden;
}
.page-about-sync-panel::before {
  content: "";
  position: absolute;
  right: -50px;
  top: -50px;
  width: 150px;
  height: 150px;
  border-radius: 50%;
  border: 2px solid rgba(245, 239, 224, 0.14);
  pointer-events: none;
}
.page-about-sync-panel::after {
  content: "";
  position: absolute;
  right: 0;
  top: 0;
  width: 8px;
  height: 100%;
  background: var(--green);
  opacity: 0.6;
}
.page-about-sync-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}
.page-about-sync-list li {
  position: relative;
  padding-left: 32px;
  font-size: 16px;
  line-height: 1.6;
  color: var(--cream);
}
.page-about-sync-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 7px;
  width: 10px;
  height: 10px;
  background: var(--green);
  transform: rotate(45deg);
}
.page-about-sync-status {
  display: flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--green);
  margin-top: 28px;
  padding-top: 18px;
  border-top: 1px solid rgba(245, 239, 224, 0.22);
}
.page-about-sync-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 4px rgba(182, 255, 0, 0.2);
  animation: page-about-pulse 2s infinite ease-in-out;
}
@keyframes page-about-pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.55; transform: scale(0.8); }
}

/* ===== 04 团队与理念 ===== */
.page-about-team {
  background: var(--panel);
  border-top: 3px solid var(--ink);
}
.page-about-team-head {
  margin-bottom: 36px;
}
.page-about-team-grid {
  display: grid;
  gap: 24px;
}
.page-about-team-idea {
  background: var(--cream);
  border: 1.5px solid var(--ink);
  padding: 28px 24px;
  box-shadow: 6px 6px 0 var(--shadow);
  position: relative;
  transition: transform 0.2s var(--ease);
}
.page-about-team-idea::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 6px;
  height: 100%;
  background: var(--orange);
  transform: skewY(-8deg);
  transform-origin: top left;
}
.page-about-team-idea:hover {
  transform: translateY(-4px);
}
.page-about-team-idea h3 {
  font-family: var(--font-head);
  font-size: 20px;
  margin: 0 0 10px;
  color: var(--ink);
}
.page-about-team-idea p {
  font-size: 15px;
  line-height: 1.65;
  margin: 0;
  color: var(--gray);
}
.page-about-team-media {
  margin-top: 40px;
  border: 2px solid var(--ink);
  box-shadow: var(--about-soft-shadow);
  overflow: hidden;
  background: var(--cream);
}
.page-about-cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 48px;
}

/* ===== 响应式 ===== */
@media (min-width: 768px) {
  .page-about-hero {
    padding: calc(var(--header-h) + 76px) 0 76px;
  }
  .page-about-hero-lead {
    font-size: 20px;
  }
  .page-about-anchor-row {
    max-width: 680px;
    gap: 14px;
  }
  .page-about-section {
    padding: 96px 0;
  }
  .page-about-duo {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
    gap: 64px;
  }
  .page-about-duo-copy h2 {
    font-size: 40px;
  }
  .page-about-section-num {
    --about-num-size: 110px;
  }
  .page-about-milestone-layout {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.72fr);
    gap: 64px;
  }
  .page-about-sync-head {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 24px;
    align-items: start;
  }
  .page-about-sync-head h2 {
    margin-top: 6px;
  }
  .page-about-sync-panel {
    padding: 46px 42px;
  }
  .page-about-team-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
  }
  .page-about-team-media {
    margin-top: 48px;
  }
  .page-about-cta-row {
    gap: 20px;
  }
}

@media (min-width: 1080px) {
  .page-about-milestone-layout {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.62fr);
    gap: 80px;
  }
  .page-about-sync-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 36px;
  }
  .page-about-sync-status {
    grid-column: 1 / -1;
    margin-top: 24px;
  }
}