.page-about {
  --about-gap: clamp(16px, 4vw, 56px);
  background: var(--ink);
  color: var(--paper);
  overflow-x: clip;
}

.page-about a {
  color: inherit;
}

.page-about .about-h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.9rem, 4.6vw, 3.4rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin: 0.4em 0 0;
  color: var(--paper);
}

.page-about .about-h2--dark {
  color: var(--ink);
}

.page-about .about-section-head {
  margin-bottom: clamp(28px, 5vw, 56px);
}

.page-about .about-section-head--split {
  display: grid;
  gap: 20px;
}

.page-about .about-section-sub {
  max-width: 58ch;
  margin: 18px 0 0;
  color: var(--steel);
  font-size: clamp(0.95rem, 1.1vw, 1.05rem);
  line-height: 1.75;
}

/* ============ 首屏 ============ */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  padding: clamp(20px, 4vw, 40px) var(--pad-x) clamp(48px, 9vw, 110px);
  background: var(--ink);
  overflow: hidden;
}

.page-about .about-hero-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.3;
  filter: saturate(0.65) contrast(1.05);
  z-index: -2;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(110% 70% at 82% 8%, rgba(255, 107, 44, 0.26), transparent 62%),
    radial-gradient(80% 60% at 6% 92%, rgba(94, 122, 90, 0.3), transparent 60%),
    linear-gradient(168deg, rgba(7, 20, 38, 0.25) 0%, rgba(7, 20, 38, 0.9) 68%, var(--ink) 100%);
}

.page-about .about-hero-beam {
  position: absolute;
  top: -22%;
  right: 4%;
  width: 44%;
  height: 148%;
  transform: rotate(13deg);
  background: linear-gradient(180deg, rgba(166, 255, 95, 0.16) 0%, rgba(255, 107, 44, 0.12) 52%, transparent 88%);
  z-index: -1;
  pointer-events: none;
}

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

.page-about .about-crumb {
  margin-bottom: clamp(28px, 5vw, 56px);
  color: var(--steel);
  font-size: 0.82rem;
}

.page-about .about-crumb a {
  color: var(--rock);
  text-decoration: none;
}

.page-about .about-crumb a:hover,
.page-about .about-crumb a:focus-visible {
  color: var(--orange);
}

.page-about .about-hero-grid {
  display: grid;
  gap: clamp(30px, 5vw, 56px);
  align-items: end;
}

.page-about .about-title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.5rem, 8.6vw, 6.2rem);
  line-height: 1.02;
  letter-spacing: -0.035em;
  margin: 0.18em 0 0;
  color: var(--paper);
}

.page-about .about-title em {
  font-style: normal;
  color: var(--orange);
}

.page-about .about-intro {
  max-width: 46ch;
  margin: clamp(20px, 3vw, 30px) 0 0;
  color: var(--steel);
  font-size: clamp(1rem, 1.25vw, 1.12rem);
  line-height: 1.82;
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(24px, 3.4vw, 36px);
}

.page-about .about-hero-panel {
  display: grid;
  gap: 10px;
}

.page-about .about-panel-block {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: clamp(14px, 2vw, 22px) clamp(16px, 2.2vw, 26px);
  border-radius: var(--radius-md);
}

.page-about .about-panel-block--clay {
  background: var(--clay);
  color: var(--paper);
}

.page-about .about-panel-block--moss {
  background: var(--moss);
  color: var(--paper);
}

.page-about .about-panel-block--rock {
  background: rgba(140, 154, 168, 0.14);
  border: var(--hairline);
  color: var(--paper);
}

.page-about .about-panel-num {
  font-family: var(--font-data);
  font-weight: 700;
  font-size: clamp(1.5rem, 2.6vw, 2rem);
  line-height: 1;
  color: var(--paper);
}

.page-about .about-panel-block--rock .about-panel-num {
  color: var(--lime);
}

.page-about .about-panel-label {
  font-size: 0.85rem;
  line-height: 1.6;
  opacity: 0.94;
}

/* ============ 品牌由来 ============ */
.page-about .about-origin {
  background: linear-gradient(180deg, var(--ink) 0%, var(--ink-2) 100%);
}

.page-about .about-origin-grid {
  display: grid;
  gap: clamp(24px, 4vw, 64px);
}

.page-about .about-origin-copy p {
  margin: 0 0 1.15em;
  color: var(--steel);
  font-size: clamp(0.97rem, 1.15vw, 1.06rem);
  line-height: 1.85;
  max-width: 62ch;
}

.page-about .about-origin-copy p:first-child {
  color: var(--paper);
  font-size: clamp(1.05rem, 1.4vw, 1.2rem);
}

/* ============ 四个坐标 ============ */
.page-about .about-coords {
  background: var(--ink-2);
  position: relative;
}

.page-about .about-coords::before {
  content: "";
  position: absolute;
  top: 0;
  left: var(--pad-x);
  right: var(--pad-x);
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(140, 154, 168, 0.3), transparent);
}

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

.page-about .about-coord {
  background: rgba(21, 59, 92, 0.34);
  border: 1px solid rgba(140, 154, 168, 0.18);
  border-radius: var(--radius-md);
  padding: clamp(16px, 2.2vw, 24px);
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-about .about-coord:hover {
  border-color: rgba(255, 107, 44, 0.45);
}

.page-about .about-coord > summary {
  display: flex;
  align-items: baseline;
  gap: 14px;
  cursor: pointer;
  list-style: none;
}

.page-about .about-coord > summary::-webkit-details-marker {
  display: none;
}

.page-about .about-coord > summary::after {
  content: "＋";
  margin-left: auto;
  font-family: var(--font-data);
  font-size: 1.05rem;
  color: var(--orange);
  line-height: 1;
}

.page-about .about-coord[open] > summary::after {
  content: "－";
}

.page-about .about-coord-idx {
  font-family: var(--font-data);
  font-size: 0.78rem;
  color: var(--rock);
  letter-spacing: 0.06em;
  flex: none;
}

.page-about .about-coord-name {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.5rem, 3vw, 2rem);
  line-height: 1;
  color: var(--paper);
  flex: none;
}

.page-about .about-coord-note {
  font-size: 0.86rem;
  line-height: 1.55;
  color: var(--steel);
}

.page-about .about-coord-body {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px dashed rgba(140, 154, 168, 0.28);
}

.page-about .about-coord-body p {
  margin: 0 0 0.85em;
  color: var(--steel);
  font-size: 0.92rem;
  line-height: 1.8;
}

.page-about .about-coord-body p:last-child {
  margin-bottom: 0;
}

/* ============ 时间轴 ============ */
.page-about .about-journey {
  background: var(--ink);
}

.page-about .about-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .about-jump a {
  font-family: var(--font-data);
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  text-decoration: none;
  color: var(--steel);
  border: 1px solid rgba(140, 154, 168, 0.3);
  border-radius: var(--radius-pill);
  padding: 7px 16px;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease), background 0.18s var(--ease);
}

.page-about .about-jump a:hover,
.page-about .about-jump a:focus-visible {
  color: var(--ink);
  background: var(--lime);
  border-color: var(--lime);
}

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

.page-about .about-tl-item {
  position: relative;
  padding: 0 0 clamp(28px, 5vw, 52px) 32px;
  border-left: 1px solid rgba(140, 154, 168, 0.22);
  scroll-margin-top: 120px;
}

.page-about .about-tl-item::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 8px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--orange);
  box-shadow: 0 0 0 5px rgba(255, 107, 44, 0.14);
}

.page-about .about-tl-item:last-child {
  border-left-color: transparent;
  padding-bottom: 0;
}

.page-about .about-tl-item#journey-2021::before {
  background: var(--lime);
  box-shadow: 0 0 0 5px rgba(166, 255, 95, 0.14);
}

.page-about .about-tl-item#journey-2023::before {
  background: var(--clay);
  box-shadow: 0 0 0 5px rgba(200, 117, 85, 0.16);
}

.page-about .about-tl-item#journey-2025::before {
  background: var(--orange);
  box-shadow: 0 0 0 5px rgba(255, 107, 44, 0.2);
}

.page-about .about-tl-year {
  display: block;
  font-family: var(--font-data);
  font-weight: 700;
  font-size: clamp(1.4rem, 3vw, 2.1rem);
  letter-spacing: 0.02em;
  color: var(--orange);
  line-height: 1;
  margin-bottom: 10px;
}

.page-about .about-tl-body h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.1rem, 1.9vw, 1.4rem);
  line-height: 1.3;
  color: var(--paper);
}

.page-about .about-tl-body p {
  margin: 0 0 12px;
  color: var(--steel);
  font-size: 0.95rem;
  line-height: 1.82;
  max-width: 62ch;
}

.page-about .about-tl-body .tag {
  display: inline-block;
  font-family: var(--font-data);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--rock);
  border: 1px solid rgba(140, 154, 168, 0.32);
  border-radius: var(--radius-pill);
  padding: 4px 12px;
}

/* ============ 团队 ============ */
.page-about .about-team {
  background: var(--paper);
  color: var(--ink);
}

.page-about .about-team .eyebrow {
  color: var(--moss);
}

.page-about .about-team-grid {
  display: grid;
  gap: clamp(28px, 4vw, 60px);
}

.page-about .about-team-img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  object-fit: cover;
  aspect-ratio: 3 / 2;
}

.page-about .about-team-caption {
  margin: 14px 0 0;
  font-size: 0.8rem;
  line-height: 1.7;
  color: #4a5a68;
}

.page-about .about-team-intro {
  margin: 20px 0 0;
  color: #2f4152;
  font-size: clamp(0.96rem, 1.15vw, 1.05rem);
  line-height: 1.82;
  max-width: 56ch;
}

.page-about .about-role-list {
  list-style: none;
  margin: clamp(24px, 3.5vw, 36px) 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-role {
  display: flex;
  gap: 14px;
  padding: 16px 18px;
  background: #fff;
  border: 1px solid rgba(21, 59, 92, 0.12);
  border-radius: var(--radius-sm);
}

.page-about .about-role-mark {
  flex: none;
  width: 10px;
  border-radius: var(--radius-pill);
  align-self: stretch;
  min-height: 40px;
}

.page-about .about-role-mark--orange { background: var(--orange); }
.page-about .about-role-mark--moss { background: var(--moss); }
.page-about .about-role-mark--clay { background: var(--clay); }
.page-about .about-role-mark--lime { background: #7bbf3e; }

.page-about .about-role h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.02rem;
  color: var(--ink);
}

.page-about .about-role p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.75;
  color: #3c4d5c;
}

/* ============ 服务中心 ============ */
.page-about .about-hub {
  background: linear-gradient(160deg, var(--ink-2) 0%, var(--pitch) 120%);
}

.page-about .about-hub-grid {
  display: grid;
  gap: clamp(28px, 4vw, 56px);
  align-items: center;
}

.page-about .about-hub-visual {
  position: relative;
}

.page-about .about-hub-img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  object-fit: cover;
  aspect-ratio: 4 / 3;
}

.page-about .about-hub-badge {
  position: absolute;
  left: 18px;
  bottom: 18px;
  font-family: var(--font-data);
  font-size: 0.76rem;
  letter-spacing: 0.1em;
  padding: 7px 14px;
  border-radius: var(--radius-pill);
  background: var(--orange);
  color: var(--ink);
  font-weight: 700;
}

.page-about .about-hub-copy p {
  margin: 18px 0 0;
  color: var(--steel);
  font-size: clamp(0.95rem, 1.1vw, 1.04rem);
  line-height: 1.82;
  max-width: 56ch;
}

.page-about .about-hub-list {
  list-style: none;
  margin: clamp(24px, 3.4vw, 34px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.page-about .about-hub-list li {
  font-size: 0.86rem;
  line-height: 1.5;
  padding: 9px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(140, 154, 168, 0.26);
  color: var(--steel);
  background: rgba(7, 20, 38, 0.3);
  transition: background 0.18s var(--ease), color 0.18s var(--ease), border-color 0.18s var(--ease);
  cursor: default;
}

.page-about .about-hub-list li:hover,
.page-about .about-hub-list li:focus-visible {
  background: var(--lime);
  border-color: var(--lime);
  color: var(--ink);
  font-weight: 700;
  outline: none;
}

/* ============ 合作生态 ============ */
.page-about .about-partners {
  background: var(--ink);
}

.page-about .about-partner-row {
  display: grid;
  gap: 14px;
}

.page-about .about-partner-card {
  border-radius: var(--radius-lg);
  padding: clamp(20px, 3vw, 30px);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.page-about .about-partner-card--clay {
  background: var(--clay);
  color: var(--paper);
}

.page-about .about-partner-card--moss {
  background: var(--moss);
  color: var(--paper);
}

.page-about .about-partner-card--pitch {
  background: var(--pitch);
  color: var(--paper);
  border: 1px solid rgba(140, 154, 168, 0.24);
}

.page-about .about-partner-card h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  line-height: 1.25;
}

.page-about .about-partner-card p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.78;
  opacity: 0.95;
}

.page-about .about-partner-tag {
  align-self: flex-start;
  margin-top: auto;
  font-family: var(--font-data);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  padding: 5px 12px;
  border-radius: var(--radius-pill);
  background: rgba(7, 20, 38, 0.28);
  color: var(--paper);
}

.page-about .about-partner-foot {
  margin: clamp(24px, 3.4vw, 36px) 0 0;
  padding-left: 16px;
  border-left: 3px solid var(--orange);
  color: var(--steel);
  font-size: 0.92rem;
  line-height: 1.8;
  max-width: 64ch;
}

/* ============ 下一步 ============ */
.page-about .about-next {
  background: linear-gradient(180deg, var(--ink) 0%, var(--ink-2) 100%);
  padding-bottom: clamp(56px, 9vw, 110px);
}

.page-about .about-next-head {
  margin-bottom: clamp(24px, 4vw, 40px);
}

.page-about .about-next-sub {
  margin: 18px 0 0;
  color: var(--steel);
  font-size: 0.98rem;
  line-height: 1.8;
}

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

.page-about .about-next-list a {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-areas:
    "kicker arrow"
    "title arrow";
  gap: 4px 16px;
  align-items: center;
  padding: clamp(16px, 2.4vw, 24px) clamp(16px, 2.6vw, 28px);
  text-decoration: none;
  border: 1px solid rgba(140, 154, 168, 0.24);
  border-radius: var(--radius-md);
  background: rgba(21, 59, 92, 0.22);
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease), transform 0.2s var(--ease);
}

.page-about .about-next-list a:hover,
.page-about .about-next-list a:focus-visible {
  border-color: var(--orange);
  background: rgba(255, 107, 44, 0.1);
  transform: translateX(4px);
}

.page-about .about-next-kicker {
  grid-area: kicker;
  font-family: var(--font-data);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--rock);
}

.page-about .about-next-list strong {
  grid-area: title;
  font-size: 0.98rem;
  font-weight: 700;
  line-height: 1.55;
  color: var(--paper);
}

.page-about .about-next-arrow {
  grid-area: arrow;
  font-family: var(--font-data);
  font-size: 1.1rem;
  color: var(--orange);
}

/* ============ 响应式 ============ */
@media (min-width: 620px) {
  .page-about .about-coord-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-hub-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-about .about-partner-card--pitch {
    grid-column: 1 / -1;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 0.78fr);
    gap: clamp(32px, 5vw, 72px);
  }

  .page-about .about-hero-panel {
    padding-bottom: 10px;
  }

  .page-about .about-panel-block:nth-child(2) {
    margin-left: 14%;
  }

  .page-about .about-panel-block:nth-child(3) {
    margin-left: 6%;
  }

  .page-about .about-origin-grid {
    grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
    align-items: start;
  }

  .page-about .about-origin-lead {
    position: sticky;
    top: 120px;
  }

  .page-about .about-section-head--split {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
    gap: 32px;
  }

  .page-about .about-tl-item {
    display: grid;
    grid-template-columns: minmax(110px, 160px) minmax(0, 1fr);
    gap: clamp(24px, 4vw, 64px);
    border-left: 0;
    padding: 0 0 clamp(36px, 5vw, 60px) 0;
  }

  .page-about .about-tl-item::before {
    display: none;
  }

  .page-about .about-tl-year {
    margin-bottom: 0;
    padding-top: 2px;
    text-align: right;
  }

  .page-about .about-tl-body {
    position: relative;
    border-left: 1px solid rgba(140, 154, 168, 0.22);
    padding-left: clamp(22px, 3vw, 40px);
  }

  .page-about .about-tl-body::before {
    content: "";
    position: absolute;
    left: -7px;
    top: 8px;
    width: 13px;
    height: 13px;
    border-radius: 50%;
    background: var(--orange);
    box-shadow: 0 0 0 5px rgba(255, 107, 44, 0.14);
  }

  .page-about .about-tl-item#journey-2021 .about-tl-body::before {
    background: var(--lime);
    box-shadow: 0 0 0 5px rgba(166, 255, 95, 0.14);
  }

  .page-about .about-tl-item#journey-2023 .about-tl-body::before {
    background: var(--clay);
    box-shadow: 0 0 0 5px rgba(200, 117, 85, 0.16);
  }

  .page-about .about-tl-item:last-child .about-tl-body {
    border-left-color: transparent;
  }

  .page-about .about-tl-item:last-child .about-tl-body::before {
    left: -7px;
  }

  .page-about .about-team-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.08fr);
    align-items: start;
  }

  .page-about .about-team-visual {
    position: sticky;
    top: 120px;
  }

  .page-about .about-hub-grid {
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
  }

  .page-about .about-hub-list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-partner-row {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-partner-card--pitch {
    grid-column: auto;
  }

  .page-about .about-next-list a:hover,
  .page-about .about-next-list a:focus-visible {
    transform: translateX(6px);
  }
}

@media (min-width: 1180px) {
  .page-about .about-title {
    letter-spacing: -0.04em;
  }

  .page-about .about-hero-panel {
    padding-top: 40px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-hero-beam {
    opacity: 0.5;
  }

  .page-about .about-coord,
  .page-about .about-jump a,
  .page-about .about-hub-list li,
  .page-about .about-next-list a {
    transition: none;
  }

  .page-about .about-next-list a:hover,
  .page-about .about-next-list a:focus-visible {
    transform: none;
  }
}
<<<END>>>