.page-about {
  --about-line: rgba(11, 60, 93, 0.14);
  --about-warm: #FFFBF5;
  --about-glow: rgba(255, 107, 53, 0.18);
}

/* 首屏 */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding-top: clamp(20px, 4vw, 44px);
  padding-bottom: clamp(44px, 7vw, 88px);
  background:
    radial-gradient(120% 90% at 88% 4%, rgba(232, 180, 74, 0.22) 0%, rgba(232, 180, 74, 0) 55%),
    linear-gradient(158deg, var(--paper) 0%, #F7EFE5 44%, var(--mist) 100%);
}

.page-about .about-hero-glow {
  position: absolute;
  top: -70px;
  right: -90px;
  width: 380px;
  height: 380px;
  pointer-events: none;
  background: radial-gradient(circle, var(--about-glow) 0%, rgba(255, 107, 53, 0) 68%);
}

.page-about .about-hero-inner {
  position: relative;
  display: grid;
  gap: clamp(32px, 5vw, 56px);
  align-items: center;
}

.page-about .about-hero-copy .breadcrumb {
  margin-bottom: var(--space-3);
}

.page-about .about-hero-copy .mono-label {
  display: block;
  margin-bottom: var(--space-2);
}

.page-about .about-hero h1 {
  margin: 0 0 var(--space-3);
  font-size: clamp(32px, 7.6vw, 66px);
  line-height: 1.06;
  letter-spacing: -0.02em;
  font-weight: 900;
  color: var(--sea);
  max-width: 16em;
}

.page-about .about-lede {
  margin: 0;
  max-width: 42em;
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--ink);
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-4);
}

.page-about .about-hero-figure {
  margin: 0;
}

.page-about .about-hero-figure .media-frame {
  aspect-ratio: 4 / 5;
  overflow: hidden;
  border-radius: 26px 26px 8px 26px;
  background: linear-gradient(150deg, var(--mist), rgba(255, 158, 138, 0.35));
  box-shadow: 0 24px 60px -32px rgba(11, 60, 93, 0.5);
}

.page-about .media-frame img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

.page-about .about-hero-figure .media-caption {
  display: block;
  margin-top: var(--space-2);
  font-size: 13px;
  line-height: 1.7;
  color: var(--slate);
}

/* 数字带 */
.page-about .about-strip {
  background: var(--sea);
  color: var(--paper);
}

.page-about .about-strip-inner {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-3);
  padding-top: var(--space-4);
  padding-bottom: var(--space-4);
}

.page-about .about-stat {
  border-left: 2px solid rgba(232, 180, 74, 0.5);
  padding-left: 14px;
}

.page-about .about-stat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(24px, 4.4vw, 36px);
  line-height: 1.1;
  color: var(--sand);
  letter-spacing: -0.01em;
}

.page-about .about-stat-label {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.6;
  color: rgba(253, 246, 238, 0.76);
}

/* 主体骨架 */
.page-about .about-body {
  padding-top: clamp(40px, 6vw, 80px);
  padding-bottom: clamp(40px, 6vw, 80px);
}

.page-about .about-index {
  position: sticky;
  top: calc(var(--header-h) + 24px);
  align-self: start;
}

.page-about .about-index .mono-label {
  display: block;
  margin-bottom: var(--space-2);
}

.page-about .about-index .index-link {
  display: block;
  padding: 9px 0 9px 14px;
  font-size: 14px;
  line-height: 1.5;
  color: var(--slate);
  text-decoration: none;
  transition: color 200ms var(--ease);
}

.page-about .about-index .index-link:hover,
.page-about .about-index .index-link:focus-visible {
  color: var(--sea);
}

.page-about .about-flow {
  min-width: 0;
}

.page-about .about-section {
  padding-top: clamp(40px, 6vw, 72px);
}

.page-about .about-section:first-child {
  padding-top: 0;
}

.page-about .about-section-head {
  margin-bottom: var(--space-4);
}

.page-about .about-section-head .mono-label {
  display: block;
  margin-bottom: var(--space-2);
}

.page-about .about-section-head .section-title {
  margin: 0;
  max-width: 22em;
}

.page-about .about-section-head .section-sub {
  margin: var(--space-2) 0 0;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--slate);
}

/* 起点 */
.page-about .origin-grid {
  display: grid;
  gap: var(--space-4);
}

.page-about .origin-grid .prose p {
  margin: 0 0 1.2em;
  font-size: 16px;
  line-height: 1.9;
  color: var(--ink);
}

.page-about .origin-note {
  padding: var(--space-3);
  border-radius: 30px 30px 10px 30px;
  background: var(--mist);
  align-self: start;
}

.page-about .origin-note .mono-label {
  display: block;
  margin-bottom: var(--space-2);
}

.page-about .origin-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .origin-list li {
  position: relative;
  padding: 12px 0 12px 18px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink);
  border-top: 1px solid var(--about-line);
}

.page-about .origin-list li:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .origin-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 22px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--sun);
}

.page-about .origin-list li:first-child::before {
  top: 10px;
}

/* 时间轴 */
.page-about .timeline-section {
  position: relative;
  overflow: hidden;
  margin-top: clamp(40px, 6vw, 72px);
  padding-bottom: clamp(20px, 4vw, 40px);
}

.page-about .timeline-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.13;
  pointer-events: none;
}

.page-about .timeline-inner {
  position: relative;
}

.page-about .timeline {
  position: relative;
  margin: 0;
  padding: 0 0 0 30px;
  list-style: none;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--sun) 0%, var(--sea) 100%);
}

.page-about .tl-item {
  position: relative;
  margin-bottom: var(--space-3);
}

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

.page-about .tl-dot {
  position: absolute;
  left: -30px;
  top: 24px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--sun);
  box-shadow: 0 0 0 4px rgba(255, 107, 53, 0.16);
  transition: transform 200ms var(--ease), box-shadow 200ms var(--ease);
}

.page-about .tl-item:hover .tl-dot {
  transform: scale(1.55);
  box-shadow: 0 0 0 6px rgba(255, 107, 53, 0.2);
}

.page-about .tl-card {
  padding: 20px 20px 24px;
  border: 1px solid var(--about-line);
  border-radius: var(--radius-md);
  background: var(--about-warm);
  transition: transform 220ms var(--ease), border-color 220ms var(--ease), box-shadow 220ms var(--ease);
}

.page-about .tl-item:nth-child(even) .tl-card {
  background: var(--mist);
}

.page-about .tl-item:hover .tl-card {
  transform: translateX(4px);
  border-color: var(--sun);
  box-shadow: 0 18px 40px -30px rgba(11, 60, 93, 0.55);
}

.page-about .tl-year {
  margin: 0 0 4px -4px;
  font-family: var(--font-mono);
  font-size: clamp(30px, 7vw, 52px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--sun-deep);
}

.page-about .tl-title {
  margin: 0 0 8px;
  font-size: 19px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--sea);
}

.page-about .tl-text {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink);
}

.page-about .tl-text a {
  color: var(--sun-deep);
  text-decoration: none;
  border-bottom: 1px solid rgba(201, 74, 24, 0.4);
}

.page-about .tl-text a:hover {
  border-bottom-color: var(--sun-deep);
}

/* 团队 */
.page-about .team-grid {
  display: grid;
  gap: var(--space-4);
}

.page-about .team-figure {
  margin: 0;
}

.page-about .team-figure .media-frame {
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border-radius: 8px 28px 28px 28px;
  background: linear-gradient(140deg, var(--mist), rgba(232, 180, 74, 0.3));
}

.page-about .team-figure .media-caption {
  display: block;
  margin-top: var(--space-2);
  font-size: 13px;
  line-height: 1.7;
  color: var(--slate);
}

.page-about .team-body .prose {
  margin: 0 0 var(--space-4);
  font-size: 16px;
  line-height: 1.9;
  color: var(--ink);
}

.page-about .team-split {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-3);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .team-item {
  padding-top: 12px;
  border-top: 2px solid var(--sand);
}

.page-about .team-num {
  font-family: var(--font-mono);
  font-size: 26px;
  line-height: 1;
  color: var(--sea);
}

.page-about .team-role {
  margin-left: 8px;
  font-size: 14.5px;
  font-weight: 700;
  color: var(--sea);
}

.page-about .team-desc {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--slate);
}

/* 四条准则 */
.page-about .rule-grid {
  display: grid;
  gap: var(--space-3);
}

.page-about .rule-card {
  padding: var(--space-3);
  border: 1px solid transparent;
  outline: none;
  transition: transform 230ms var(--ease), border-color 230ms var(--ease);
}

.page-about .rule-card:focus-visible {
  border-color: var(--sun);
}

.page-about .rule-card .mono-label {
  display: block;
  margin-bottom: 10px;
  color: var(--sun-deep);
}

.page-about .rule-title {
  margin: 0 0 10px;
  font-size: 20px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--sea);
}

.page-about .rule-text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink);
}

.page-about .rule-do {
  margin: 12px 0 0;
  padding-left: 10px;
  border-left: 2px solid var(--sun);
  font-size: 14px;
  line-height: 1.8;
  color: var(--sun-deep);
}

.page-about .rule-card--1 {
  border-radius: 12px 28px 12px 28px;
  background: var(--mist);
}

.page-about .rule-card--2 {
  border-radius: 28px 12px 28px 12px;
  background: #FDEEE2;
  border-color: rgba(255, 107, 53, 0.3);
}

.page-about .rule-card--3 {
  border-radius: 44px 12px 44px 12px;
  background: rgba(232, 180, 74, 0.18);
}

.page-about .rule-card--4 {
  border-radius: 12px 44px 12px 44px;
  background: rgba(255, 158, 138, 0.18);
}

/* 合作与认可 */
.page-about .partner-grid {
  display: grid;
  gap: var(--space-3);
}

.page-about .partner-item {
  padding: var(--space-3);
  border-left: 3px solid var(--sand);
  background: var(--about-warm);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.page-about .partner-title {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--sea);
}

.page-about .partner-text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--ink);
}

/* 接下来 */
.page-about .about-next {
  margin-top: clamp(48px, 7vw, 88px);
  padding: clamp(32px, 5vw, 56px) clamp(24px, 4vw, 48px);
  border-radius: 40px 16px 40px 16px;
  background:
    radial-gradient(110% 80% at 92% 0%, rgba(255, 107, 53, 0.22) 0%, rgba(255, 107, 53, 0) 58%),
    var(--sea);
  color: var(--paper);
}

.page-about .about-next .mono-label {
  display: block;
  margin-bottom: var(--space-2);
  color: var(--sand);
}

.page-about .about-next .section-title {
  margin: 0 0 var(--space-4);
  color: var(--paper);
  max-width: 20em;
}

.page-about .next-list {
  display: grid;
  gap: var(--space-3);
  margin: 0 0 var(--space-4);
  padding: 0;
  list-style: none;
}

.page-about .next-item {
  padding-top: 14px;
  border-top: 1px solid rgba(253, 246, 238, 0.24);
}

.page-about .next-title {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--sand);
}

.page-about .next-text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: rgba(253, 246, 238, 0.86);
}

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

.page-about .about-next .btn--ghost {
  color: var(--paper);
  border-color: rgba(253, 246, 238, 0.5);
}

.page-about .about-next .btn--ghost:hover,
.page-about .about-next .btn--ghost:focus-visible {
  border-color: var(--sand);
  color: var(--sand);
}

/* 桌面端 */
@media (min-width: 880px) {
  .page-about .about-hero-inner {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.78fr);
    gap: clamp(40px, 6vw, 80px);
  }

  .page-about .about-strip-inner {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: var(--space-4);
    padding-top: var(--space-5);
    padding-bottom: var(--space-5);
  }

  .page-about .origin-grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    gap: var(--space-5);
  }

  .page-about .timeline {
    padding-left: 44px;
  }

  .page-about .timeline::before {
    left: 7px;
  }

  .page-about .tl-dot {
    left: -44px;
    top: 28px;
  }

  .page-about .tl-card {
    padding: 26px 32px 30px;
  }

  .page-about .tl-year {
    margin-left: -8px;
  }

  .page-about .team-grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    gap: var(--space-5);
    align-items: start;
  }

  .page-about .rule-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-4);
  }

  .page-about .rule-card:nth-child(even) {
    margin-top: var(--space-4);
  }

  .page-about .rule-card:hover {
    border-color: rgba(255, 107, 53, 0.55);
  }

  .page-about .rule-do {
    max-height: 0;
    margin-top: 0;
    opacity: 0;
    overflow: hidden;
    border-left-color: transparent;
    transition: max-height 260ms var(--ease), opacity 200ms var(--ease),
      margin-top 260ms var(--ease), border-color 200ms var(--ease);
  }

  .page-about .rule-card:hover .rule-do,
  .page-about .rule-card:focus-within .rule-do {
    max-height: 220px;
    margin-top: 12px;
    opacity: 1;
    border-left-color: var(--sun);
  }

  .page-about .partner-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-4);
  }

  .page-about .next-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--space-4);
  }
}

@media (max-width: 899px) {
  .page-about .about-index {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .tl-dot,
  .page-about .tl-card,
  .page-about .rule-card,
  .page-about .rule-do,
  .page-about .about-index .index-link {
    transition: none;
  }

  .page-about .tl-item:hover .tl-card,
  .page-about .tl-item:hover .tl-dot {
    transform: none;
  }
}
<<<END>>>