.page-about {
  --about-axis: 7px;
  background: var(--field);
  color: var(--ice);
  overflow-x: hidden;
}

.page-about .container {
  width: 100%;
  padding-inline: 18px;
  margin-inline: auto;
}

.page-about .section {
  padding: 52px 0;
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  margin: 0 0 22px;
}
.page-about .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--steel);
}
.page-about .breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: rgba(124, 139, 161, 0.6);
}
.page-about .breadcrumb a {
  color: var(--steel);
  text-decoration: none;
  transition: color 160ms var(--ease);
}
.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  color: var(--cyan);
}
.page-about .breadcrumb li[aria-current] {
  color: var(--ice);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: 26px 0 52px;
  background:
    radial-gradient(120% 80% at 96% 4%, rgba(43, 232, 176, 0.12), transparent 58%),
    linear-gradient(158deg, var(--field) 0%, var(--field) 52%, var(--panel) 100%);
}
.page-about .about-hero__media {
  position: absolute;
  inset: 0 0 0 auto;
  z-index: -1;
  width: 100%;
  max-width: 760px;
  opacity: 0.24;
  clip-path: polygon(38% 0, 100% 0, 100% 82%, 0 100%);
}
.page-about .about-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(112deg, var(--field) 34%, rgba(11, 27, 51, 0.15) 100%);
}
.page-about .about-hero__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.page-about .about-hero__grid {
  display: grid;
  gap: 30px;
  margin-top: 8px;
}
.page-about .about-hero h1 {
  margin: 14px 0 18px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 8.4vw, 60px);
  line-height: 1.07;
  letter-spacing: -0.02em;
  color: var(--ice);
  max-width: 15em;
}
.page-about .about-hero__lead {
  margin: 0;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.75;
  color: rgba(244, 247, 251, 0.78);
}
.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}
.page-about .about-hero__panel {
  position: relative;
  padding: 22px 20px 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius-organic);
  background: linear-gradient(152deg, rgba(22, 48, 90, 0.92), rgba(11, 27, 51, 0.68));
}
.page-about .about-hero__panel::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 20px;
  width: 56px;
  height: 3px;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--orange), var(--cyan));
}
.page-about .about-hero__panel-title {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--steel);
}
.page-about .about-hero__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 14px;
}
.page-about .about-hero__list li {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  font-size: 14px;
  line-height: 1.6;
  color: rgba(244, 247, 251, 0.8);
}
.page-about .about-hero__num {
  font-size: 26px;
  font-weight: 700;
  color: var(--cyan);
  line-height: 1;
}

/* ---------- 分区标题 ---------- */
.page-about .index-tag {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--orange);
}
.page-about .about-origin h2,
.page-about .about-track h2,
.page-about .about-team h2,
.page-about .about-flow h2,
.page-about .about-reach h2,
.page-about .about-reply h2,
.page-about .about-next h2 {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 5.6vw, 34px);
  line-height: 1.18;
  letter-spacing: -0.015em;
}

/* ---------- 01 起点 ---------- */
.page-about .about-origin__grid {
  display: grid;
  gap: 28px;
}
.page-about .about-origin__copy p {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(244, 247, 251, 0.76);
}
.page-about .about-origin__copy p:last-child {
  margin-bottom: 0;
}
.page-about .about-origin__note {
  padding: 20px 20px 22px;
  border-left: 3px solid var(--orange);
  border-radius: var(--radius-organic-alt);
  background: linear-gradient(150deg, rgba(22, 48, 90, 0.62), rgba(22, 48, 90, 0.18));
}
.page-about .about-origin__note-title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--peach);
}
.page-about .about-origin__note-text {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: rgba(244, 247, 251, 0.86);
}

/* ---------- 02 时间轴 ---------- */
.page-about .about-track__head {
  margin-bottom: 34px;
}
.page-about .about-track__lead {
  margin: 0;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(244, 247, 251, 0.7);
}
.page-about .timeline {
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .timeline::before {
  content: "";
  position: absolute;
  left: var(--about-axis);
  top: 12px;
  bottom: 16px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--orange) 0%, var(--cyan) 100%);
}
.page-about .tl-item {
  position: relative;
  padding: 0 0 26px 34px;
}
.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 4px;
  width: 16px;
  height: 16px;
  box-sizing: border-box;
  border-radius: 50%;
  border: 2px solid var(--orange);
  background: var(--field);
  transition: box-shadow 200ms var(--ease), border-color 200ms var(--ease);
}
.page-about .tl-item:last-child {
  padding-bottom: 0;
}
.page-about .tl-item:last-child::before {
  border-color: var(--cyan);
  box-shadow: 0 0 0 5px rgba(43, 232, 176, 0.14);
}
.page-about .tl-item__year {
  margin: 0 0 10px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--orange);
}
.page-about .tl-item__body {
  padding: 18px 18px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius-organic-alt);
  background: linear-gradient(150deg, rgba(22, 48, 90, 0.58), rgba(22, 48, 90, 0.16));
  transition: transform 220ms var(--ease), border-color 220ms var(--ease), box-shadow 220ms var(--ease);
}
.page-about .tl-item__body h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--ice);
}
.page-about .tl-item__problem {
  margin: 0 0 8px;
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--cyan);
}
.page-about .tl-item__body > p:last-child {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: rgba(244, 247, 251, 0.74);
}
.page-about .tl-item:hover .tl-item__body,
.page-about .tl-item:focus-within .tl-item__body {
  transform: translateY(-3px);
  border-color: rgba(255, 106, 26, 0.5);
  box-shadow: 0 16px 30px rgba(6, 13, 24, 0.45);
}
.page-about .tl-item:hover::before {
  box-shadow: 0 0 0 5px rgba(255, 106, 26, 0.18);
}

/* ---------- 浅色分区通用 ---------- */
.page-about .band--light {
  background: var(--ice);
  color: var(--field);
}
.page-about .band--light .index-tag {
  color: var(--teal);
}
.page-about .band--light h2 {
  color: var(--field);
}

/* ---------- 03 团队 ---------- */
.page-about .about-team__grid {
  display: grid;
  gap: 26px;
}
.page-about .about-team__intro p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(11, 27, 51, 0.72);
}
.page-about .about-team__intro p:last-child {
  margin-bottom: 0;
}
.page-about .role-list {
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .role {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 2px 14px;
  padding: 16px 0;
  border-top: 1px solid rgba(11, 27, 51, 0.14);
}
.page-about .role:last-child {
  border-bottom: 1px solid rgba(11, 27, 51, 0.14);
}
.page-about .role__num {
  grid-row: 1 / span 2;
  align-self: start;
  font-size: 22px;
  font-weight: 600;
  line-height: 1.2;
  color: var(--orange);
}
.page-about .role h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 800;
  color: var(--field);
}
.page-about .role p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(11, 27, 51, 0.66);
}

/* ---------- 04 流程 ---------- */
.page-about .about-flow__grid {
  display: grid;
  gap: 30px;
}
.page-about .about-flow__lead {
  margin: 0 0 22px;
  max-width: 32em;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(244, 247, 251, 0.72);
}
.page-about .flow {
  border-top: 1px solid var(--line);
}
.page-about .flow__step {
  border-bottom: 1px solid var(--line);
  border-left: 2px solid rgba(124, 139, 161, 0.32);
  transition: border-color 220ms var(--ease), background 220ms var(--ease);
}
.page-about .flow__step[open] {
  border-left-color: var(--orange);
  background: linear-gradient(96deg, rgba(22, 48, 90, 0.55), transparent 78%);
}
.page-about .flow__step summary {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 15px 14px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--ice);
}
.page-about .flow__step summary::-webkit-details-marker {
  display: none;
}
.page-about .flow__step summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--cyan);
}
.page-about .flow__step[open] summary::after {
  content: "–";
}
.page-about .flow__step summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}
.page-about .flow__idx {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--orange);
}
.page-about .flow__body {
  padding: 0 14px 18px;
}
.page-about .flow__body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: rgba(244, 247, 251, 0.74);
}
.page-about .about-flow__media {
  margin: 0;
}
.page-about .about-flow__media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

/* ---------- 05 覆盖范围 ---------- */
.page-about .about-reach__grid {
  display: grid;
  gap: 26px;
  align-items: center;
}
.page-about .about-reach__map {
  margin: 0;
  border-radius: var(--radius-organic);
  overflow: hidden;
  border: 1px solid rgba(11, 27, 51, 0.1);
  background: linear-gradient(150deg, rgba(22, 48, 90, 0.08), rgba(43, 232, 176, 0.08));
}
.page-about .about-reach__map img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: contain;
}
.page-about .about-reach__copy p {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(11, 27, 51, 0.72);
}
.page-about .legend {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 0 0 20px;
  padding: 0;
  list-style: none;
}
.page-about .legend__item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 14px;
  border-radius: var(--radius-pill);
  background: rgba(11, 27, 51, 0.06);
  font-size: 14px;
  font-weight: 500;
  color: var(--field);
  transition: background 180ms var(--ease), transform 180ms var(--ease);
}
.page-about .legend__item:hover {
  background: rgba(255, 106, 26, 0.18);
  transform: translateY(-2px);
}
.page-about .legend__dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  flex: none;
}
.page-about .legend__dot--a { background: var(--orange); }
.page-about .legend__dot--b { background: var(--teal); }
.page-about .legend__dot--c { background: var(--cyan); }
.page-about .legend__dot--d { background: #16305A; }
.page-about .legend__dot--e { background: var(--steel); }
.page-about .about-reach__note {
  margin: 0;
  padding-top: 16px;
  border-top: 1px solid rgba(11, 27, 51, 0.14);
  font-size: 14px;
  line-height: 1.72;
  color: rgba(11, 27, 51, 0.66);
}

/* ---------- 06 回应 ---------- */
.page-about .about-reply__grid {
  display: grid;
  gap: 26px;
  align-items: center;
}
.page-about .about-reply__copy p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(244, 247, 251, 0.76);
}
.page-about .about-reply__link {
  margin: 22px 0 0;
}
.page-about .about-reply__stat {
  padding: 26px 22px;
  border-radius: var(--radius-organic);
  border: 1px solid var(--line);
  background: linear-gradient(150deg, rgba(22, 48, 90, 0.8), rgba(14, 122, 95, 0.24));
  text-align: left;
}
.page-about .about-reply__stat-num {
  font-size: 56px;
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
}
.page-about .about-reply__stat-unit {
  margin-left: 6px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--steel);
}
.page-about .about-reply__stat-note {
  margin: 12px 0 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: rgba(244, 247, 251, 0.7);
}

/* ---------- 下一站 ---------- */
.page-about .about-next {
  position: relative;
  overflow: hidden;
  padding: 46px 0 52px;
  background: linear-gradient(118deg, var(--panel) 0%, var(--ink) 100%);
  border-top: 1px solid var(--line);
}
.page-about .about-next::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(96deg, transparent 0 54%, rgba(255, 106, 26, 0.12) 54% 100%);
  pointer-events: none;
}
.page-about .about-next__inner {
  position: relative;
}
.page-about .about-next h2 {
  margin: 0;
}
.page-about .about-next__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}
.page-about .about-next__links a {
  display: inline-flex;
  align-items: center;
  padding: 12px 22px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--line-strong);
  background: rgba(244, 247, 251, 0.07);
  color: var(--ice);
  font-size: 14.5px;
  font-weight: 600;
  text-decoration: none;
  transition: transform 200ms var(--ease), background 200ms var(--ease), border-color 200ms var(--ease);
}
.page-about .about-next__links a:first-child {
  background: var(--orange);
  border-color: var(--orange);
  color: #1A0A00;
}
.page-about .about-next__links a:hover,
.page-about .about-next__links a:focus-visible {
  transform: translateY(-2px);
  border-color: var(--orange);
}
.page-about .about-next__links a:not(:first-child):hover,
.page-about .about-next__links a:not(:first-child):focus-visible {
  background: rgba(255, 106, 26, 0.18);
}

/* ---------- 断点 ---------- */
@media (min-width: 700px) {
  .page-about .container {
    padding-inline: 26px;
  }
  .page-about .section {
    padding: 64px 0;
  }
  .page-about .about-hero {
    padding: 34px 0 68px;
  }
  .page-about .about-hero__lead {
    font-size: 17px;
  }
  .page-about .legend {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-reply__stat {
    padding: 32px 28px;
  }
  .page-about .about-reply__stat-num {
    font-size: 68px;
  }
  .page-about .tl-item {
    padding-left: 42px;
  }
}

@media (min-width: 960px) {
  .page-about .container {
    width: min(100% - 56px, var(--maxw));
    padding-inline: 0;
  }
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: end;
    gap: 44px;
  }
  .page-about .about-hero__panel {
    align-self: end;
    padding: 26px 24px 28px;
  }
  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 52px;
    align-items: start;
  }
  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    gap: 48px;
    align-items: start;
  }
  .page-about .about-flow__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 48px;
    align-items: start;
  }
  .page-about .about-flow__media {
    margin-top: 8px;
  }
  .page-about .about-reach__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
    gap: 48px;
  }
  .page-about .about-reply__grid {
    grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
    gap: 48px;
  }
  .page-about .about-next__links {
    margin-top: 28px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .tl-item__body,
  .page-about .flow__step,
  .page-about .legend__item,
  .page-about .about-next__links a,
  .page-about .breadcrumb a {
    transition: none;
  }
  .page-about .tl-item:hover .tl-item__body,
  .page-about .tl-item:focus-within .tl-item__body,
  .page-about .legend__item:hover,
  .page-about .about-next__links a:hover {
    transform: none;
  }
}
<<<END>>>