.page-about {
  --about-gap: clamp(1.4rem, 3.6vw, 3.2rem);
  --about-rule: 1px solid var(--line-light);
}

/* 面包屑 */
.page-about .about-crumbs {
  padding-top: clamp(1.1rem, 3vw, 1.8rem);
  padding-bottom: clamp(0.8rem, 2vw, 1.2rem);
}

/* 首屏 */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  background: var(--jbo-black);
  color: var(--jbo-paper);
  padding-block: clamp(2.2rem, 7vw, 4.6rem) clamp(2.4rem, 6vw, 4rem);
}
.page-about .about-hero-cut {
  position: absolute;
  top: -10%;
  right: -36%;
  width: 98%;
  height: 128%;
  background: var(--jbo-red);
  clip-path: polygon(48% 0, 100% 0, 100% 100%, 0 100%);
  z-index: 0;
}
.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: var(--jbo-cyan);
  opacity: 0.6;
  z-index: 2;
}
.page-about .about-hero-inner {
  position: relative;
  z-index: 1;
}
.page-about .about-hero-index {
  color: var(--jbo-cyan);
}
.page-about .about-hero-title {
  margin: 0.9rem 0 0;
  font-family: var(--font-sans);
  font-weight: 200;
  font-size: clamp(2.4rem, 9.2vw, 6rem);
  line-height: 1.04;
  letter-spacing: -0.03em;
  max-width: 18ch;
}
.page-about .about-hero-title strong {
  display: inline-block;
  font-weight: 900;
  font-style: italic;
  transform: skewX(-6deg);
  transform-origin: left bottom;
  padding-right: 0.06em;
}
.page-about .about-hero-lede {
  margin: clamp(1.1rem, 3vw, 1.6rem) 0 0;
  max-width: 34rem;
  font-size: clamp(0.98rem, 2vw, 1.12rem);
  line-height: 1.85;
  color: rgba(244, 246, 248, 0.84);
}
.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(1.8rem, 5vw, 2.8rem) 0 0;
  padding: 0;
  list-style: none;
  background: var(--line-dark);
  border: 1px solid var(--line-dark);
  border-radius: var(--radius-md);
  overflow: hidden;
}
.page-about .about-stats li {
  background: var(--jbo-panel);
  padding: 0.9rem 1rem 1rem;
}
.page-about .about-stat-num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: clamp(1.3rem, 4vw, 1.95rem);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--jbo-cyan);
}
.page-about .about-stat-label {
  display: block;
  margin-top: 0.35rem;
  font-size: 0.76rem;
  letter-spacing: 0.12em;
  color: var(--jbo-steel);
}

/* 通用章节标题 */
.page-about .about-h2 {
  margin: 0.55rem 0 0.9rem;
  font-size: clamp(1.65rem, 4.6vw, 2.85rem);
  font-weight: 800;
  line-height: 1.22;
  letter-spacing: -0.02em;
  color: var(--ink);
}
.page-about .about-sub {
  margin: 0;
  max-width: 42rem;
  font-size: clamp(0.96rem, 1.9vw, 1.04rem);
  line-height: 1.85;
  color: var(--ink-soft);
}
.page-about .about-body {
  margin: 1rem 0 0;
  max-width: 44rem;
  font-size: 0.96rem;
  line-height: 1.85;
  color: var(--ink-soft);
}
.page-about .about-section-head {
  max-width: 46rem;
  margin-bottom: clamp(1.6rem, 4vw, 2.6rem);
}
.page-about .about-inline-link {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  margin-top: 1.4rem;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--jbo-red);
  text-decoration: none;
  border-bottom: 1px solid rgba(225, 6, 44, 0.35);
  padding-bottom: 0.15rem;
}
.page-about .about-inline-link--tight {
  margin-top: 0;
  margin-left: auto;
}
.page-about .about-inline-link span {
  transition: transform 180ms var(--ease);
}
.page-about .about-inline-link:hover span,
.page-about .about-inline-link:focus-visible span {
  transform: translateX(4px);
}

/* 品牌起点 */
.page-about .about-origin {
  background: var(--jbo-paper);
}
.page-about .about-origin-grid {
  display: grid;
  gap: var(--about-gap);
  align-items: start;
}
.page-about .about-origin-figure {
  margin: 0;
}
.page-about .about-origin-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border-radius: var(--radius-lg);
}
.page-about .about-origin-figure figcaption,
.page-about .about-partners-figure figcaption {
  margin-top: 0.7rem;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--jbo-steel);
  line-height: 1.6;
}

/* 时间轴 */
.page-about .about-milestones {
  background: #fff;
}
.page-about .timeline {
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-about .timeline-item {
  display: grid;
  grid-template-columns: 3.6rem minmax(0, 1fr);
  column-gap: 0.85rem;
}
.page-about .timeline-year {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.02em;
  color: var(--jbo-steel);
  padding-top: 0.1rem;
  text-align: left;
}
.page-about .timeline-body {
  position: relative;
  border-left: 1px solid var(--line-light);
  padding: 0 0 1.7rem 1.15rem;
}
.page-about .timeline-body::before {
  content: "";
  position: absolute;
  left: -4.5px;
  top: 0.42rem;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #fff;
  border: 1px solid var(--jbo-steel);
}
.page-about .timeline-item:last-child .timeline-body {
  padding-bottom: 0;
}
.page-about .timeline-body h3 {
  margin: 0 0 0.45rem;
  font-size: clamp(1.02rem, 2.4vw, 1.24rem);
  font-weight: 700;
  color: var(--ink);
  line-height: 1.45;
}
.page-about .timeline-body p {
  margin: 0;
  font-size: 0.93rem;
  line-height: 1.8;
  color: var(--ink-soft);
}
.page-about .timeline-item--now .timeline-year {
  color: var(--jbo-red);
}
.page-about .timeline-item--now .timeline-body::before {
  background: var(--jbo-red);
  border-color: var(--jbo-red);
  box-shadow: 0 0 0 4px rgba(225, 6, 44, 0.14);
}

/* 团队 */
.page-about .about-team {
  color: var(--jbo-paper);
}
.page-about .about-team-grid {
  display: grid;
  gap: var(--about-gap);
  align-items: center;
}
.page-about .about-team .about-h2 {
  color: var(--jbo-paper);
}
.page-about .about-team-index {
  color: var(--jbo-cyan);
}
.page-about .about-team .about-sub {
  color: rgba(244, 246, 248, 0.76);
}
.page-about .about-team-btn {
  margin-top: 1.5rem;
  border-color: rgba(244, 246, 248, 0.4);
  color: var(--jbo-paper);
}
.page-about .about-team-figure {
  margin: 0;
}
.page-about .about-team-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line-dark);
}
.page-about .duty-list {
  margin-top: clamp(1.8rem, 4.5vw, 3rem);
  border-top: 1px solid var(--line-dark);
}
.page-about .duty {
  border-bottom: 1px solid var(--line-dark);
}
.page-about .duty-head {
  display: grid;
  grid-template-columns: 2.1rem minmax(0, 1fr);
  gap: 0.25rem 0.7rem;
  align-items: baseline;
  padding: 1.05rem 0;
  cursor: pointer;
  list-style: none;
}
.page-about .duty-head::-webkit-details-marker {
  display: none;
}
.page-about .duty-num {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--jbo-steel);
  letter-spacing: 0.06em;
}
.page-about .duty-name {
  font-size: clamp(1rem, 2.4vw, 1.16rem);
  font-weight: 700;
  color: var(--jbo-paper);
  transition: color 180ms var(--ease);
}
.page-about .duty-meta {
  grid-column: 2;
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  color: var(--jbo-cyan);
}
.page-about .duty[open] .duty-name {
  color: var(--jbo-cyan);
}
.page-about .duty-body {
  padding: 0 0 1.25rem 2.8rem;
}
.page-about .duty-body p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.82;
  color: rgba(244, 246, 248, 0.74);
}

/* 内容体系 */
.page-about .about-scale {
  background: #fff;
}
.page-about .scale-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-bottom: clamp(1.6rem, 4vw, 2.4rem);
  background: var(--line-light);
  border: 1px solid var(--line-light);
  border-radius: var(--radius-md);
  overflow: hidden;
}
.page-about .scale-card {
  background: var(--jbo-paper);
  padding: clamp(0.95rem, 2.6vw, 1.6rem);
}
.page-about .scale-card--wide {
  grid-column: span 2;
}
.page-about .scale-num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: clamp(1.5rem, 4.4vw, 2.45rem);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--jbo-red);
}
.page-about .scale-card h3 {
  margin: 0.55rem 0 0.3rem;
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--ink);
}
.page-about .scale-card p {
  margin: 0;
  font-size: 0.86rem;
  line-height: 1.72;
  color: var(--ink-soft);
}
.page-about .topic-strip {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55rem;
}
.page-about .topic-chip {
  display: inline-block;
  padding: 0.36em 0.85em;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(123, 77, 255, 0.4);
  background: rgba(123, 77, 255, 0.08);
  color: var(--jbo-violet);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}

/* 区域与合作 */
.page-about .about-partners {
  position: relative;
  background-color: var(--jbo-black);
  background-image: radial-gradient(rgba(244, 246, 248, 0.16) 1px, transparent 1px);
  background-size: 22px 22px;
  color: var(--jbo-paper);
}
.page-about .about-partners-grid {
  display: grid;
  gap: var(--about-gap);
  align-items: center;
}
.page-about .about-partners .about-h2 {
  color: var(--jbo-paper);
}
.page-about .about-partners-index {
  color: var(--jbo-violet);
}
.page-about .about-partners .about-sub {
  color: rgba(244, 246, 248, 0.78);
}
.page-about .partner-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1.4rem 0 0;
  padding: 0;
  list-style: none;
}
.page-about .partner-tag {
  padding: 0.4em 0.9em;
  border-radius: var(--radius-pill);
  border: 1px solid var(--line-dark);
  background: rgba(21, 25, 34, 0.85);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: rgba(244, 246, 248, 0.9);
}
.page-about .partner-tag--cyan {
  border-color: rgba(0, 240, 208, 0.5);
  color: var(--jbo-cyan);
}
.page-about .partner-tag--violet {
  border-color: rgba(123, 77, 255, 0.55);
  color: #B9A3FF;
}
.page-about .about-partners-btn {
  margin-top: 1.6rem;
}
.page-about .about-partners-figure {
  margin: 0;
}
.page-about .about-partners-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border-radius: var(--radius-lg);
  clip-path: polygon(0 0, 100% 4%, 100% 100%, 0 96%);
}

/* 服务承诺与联系 */
.page-about .about-contact {
  color: var(--jbo-paper);
}
.page-about .about-contact-index {
  color: var(--jbo-cyan);
}
.page-about .about-contact .about-h2 {
  color: var(--jbo-paper);
}
.page-about .about-sub--inv {
  color: rgba(244, 246, 248, 0.78);
}
.page-about .about-contact-grid {
  display: grid;
  gap: var(--about-gap);
  align-items: start;
}
.page-about .about-promise-list {
  margin: 1.4rem 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.75rem;
}
.page-about .about-promise-list li {
  display: grid;
  grid-template-columns: 14px minmax(0, 1fr);
  gap: 0.7rem;
  align-items: start;
  font-size: 0.93rem;
  line-height: 1.75;
  color: rgba(244, 246, 248, 0.82);
}
.page-about .promise-mark {
  width: 14px;
  height: 2px;
  margin-top: 0.72rem;
  background: var(--jbo-green);
}
.page-about .about-contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.7rem;
}
.page-about .about-ghost-inv {
  border-color: rgba(244, 246, 248, 0.38);
  color: var(--jbo-paper);
}
.page-about .about-contact-card {
  background: var(--jbo-black);
  border: 1px solid var(--line-dark);
  border-radius: var(--radius-lg);
  padding: clamp(1.2rem, 3.2vw, 1.9rem);
}
.page-about .about-contact-card-title {
  margin: 0 0 1.1rem;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--jbo-steel);
}
.page-about .about-contact-list {
  margin: 0;
  display: grid;
  gap: 0.95rem;
}
.page-about .about-contact-row {
  display: grid;
  gap: 0.2rem;
  padding-bottom: 0.9rem;
  border-bottom: 1px solid var(--line-dark);
}
.page-about .about-contact-row:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}
.page-about .about-contact-row dt {
  font-size: 0.74rem;
  letter-spacing: 0.14em;
  color: var(--jbo-steel);
}
.page-about .about-contact-row dd {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--jbo-paper);
  word-break: break-word;
}
.page-about .about-contact-row dd a {
  color: var(--jbo-paper);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 240, 208, 0.45);
}
.page-about .about-copy {
  font-size: 0.72rem;
  padding: 0.22em 0.7em;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(0, 240, 208, 0.5);
  background: transparent;
  color: var(--jbo-cyan);
  cursor: pointer;
}
.page-about .about-contact-note {
  margin: 1.2rem 0 0;
  font-size: 0.78rem;
  line-height: 1.75;
  color: var(--jbo-steel);
}

/* 中等屏幕 */
@media (min-width: 640px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .timeline-item {
    grid-template-columns: 5rem minmax(0, 1fr);
    column-gap: 1.4rem;
  }
  .page-about .timeline-year {
    font-size: 1.3rem;
  }
}

/* 桌面 */
@media (min-width: 900px) {
  .page-about .about-hero-cut {
    right: -14%;
    top: -16%;
    width: 64%;
    height: 138%;
  }
  .page-about .about-origin-grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: clamp(2rem, 5vw, 4.5rem);
  }
  .page-about .about-origin-figure {
    margin-top: 2.2rem;
  }
  .page-about .about-team-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.85fr);
    gap: clamp(2rem, 5vw, 4rem);
  }
  .page-about .duty-head {
    grid-template-columns: 2.6rem minmax(0, 1.05fr) minmax(0, 1fr);
    align-items: baseline;
    padding: 1.25rem 0;
  }
  .page-about .duty-meta {
    grid-column: 3;
    justify-self: end;
    text-align: right;
  }
  .page-about .duty-body {
    padding-left: 3.4rem;
    max-width: 48rem;
  }
  .page-about .scale-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .scale-card--wide {
    grid-column: span 2;
  }
  .page-about .about-partners-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.92fr);
    gap: clamp(2rem, 5vw, 4rem);
  }
  .page-about .about-contact-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.85fr);
    gap: clamp(2rem, 5vw, 4rem);
  }
  .page-about .timeline-item {
    grid-template-columns: 8rem minmax(0, 1fr);
    column-gap: 2.2rem;
  }
  .page-about .timeline-year {
    font-size: 1.65rem;
  }
  .page-about .timeline-body {
    padding-left: 1.6rem;
    padding-bottom: 2rem;
  }
}

/* 动效降级 */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-inline-link span,
  .page-about .duty-name {
    transition: none;
  }
}
<<<END>>>