.page-about {
  --about-cut: 22px;
  color: var(--mist);
}

.page-about img {
  max-width: 100%;
  height: auto;
}

/* ---------- 首屏 ---------- */
.page-about .about-intro {
  position: relative;
  overflow: hidden;
  padding-top: calc(var(--header-h) + 40px);
  padding-bottom: 48px;
  background:
    radial-gradient(120% 90% at 86% 0%, rgba(38, 224, 230, 0.16), transparent 62%),
    radial-gradient(90% 80% at 6% 8%, rgba(167, 107, 255, 0.14), transparent 66%),
    var(--ink-900);
}

.page-about .about-intro::after {
  content: "";
  position: absolute;
  top: 0;
  right: -12%;
  width: 44%;
  height: 100%;
  background: linear-gradient(180deg, rgba(255, 138, 61, 0.12), transparent 72%);
  clip-path: polygon(46% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-about .about-intro .container {
  position: relative;
  z-index: 1;
}

.page-about .about-intro-grid {
  display: grid;
  gap: 28px;
  margin-top: 18px;
  align-items: end;
}

.page-about .about-intro h1 {
  margin: 12px 0 16px;
  font-size: clamp(30px, 5.4vw, 52px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  font-weight: 800;
  color: var(--mist);
}

.page-about .about-lead {
  max-width: 46ch;
  margin: 0;
  color: var(--slate);
  font-size: 15.5px;
  line-height: 1.85;
}

.page-about .about-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

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

.page-about .about-intro-figure img {
  display: block;
  width: 100%;
  background: var(--ink-700);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
}

.page-about .about-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 36px 0 0;
  background: var(--line);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .about-fact {
  display: flex;
  flex-direction: column-reverse;
  gap: 4px;
  padding: 16px 14px;
  margin: 0;
  background: var(--ink-900);
}

.page-about .about-fact dt,
.page-about .about-fact dd {
  margin: 0;
}

.page-about .about-fact-value {
  font-size: 24px;
  line-height: 1.1;
  color: var(--cyan);
  letter-spacing: -0.02em;
}

.page-about .about-fact-label {
  font-size: 12px;
  line-height: 1.5;
  color: var(--slate);
}

/* ---------- 章节标题 ---------- */
.page-about .about-head {
  max-width: 62ch;
}

.page-about .about-head h2 {
  margin: 10px 0 12px;
  font-size: clamp(23px, 3.6vw, 34px);
  line-height: 1.24;
  letter-spacing: -0.01em;
  color: var(--mist);
}

.page-about .about-head-note {
  margin: 0;
  color: var(--slate);
  font-size: 15px;
  line-height: 1.85;
}

/* ---------- 为什么只做入口 ---------- */
.page-about .about-why-grid {
  display: grid;
  gap: 22px;
}

.page-about .about-why-lead {
  padding: 26px 22px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--about-cut)), calc(100% - var(--about-cut)) 100%, 0 100%);
}

.page-about .about-why-lead .eyebrow {
  color: var(--deep-ink);
}

.page-about .about-why-lead h2 {
  margin: 10px 0 12px;
  font-size: clamp(21px, 3.2vw, 29px);
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--deep-ink);
}

.page-about .about-why-lead p {
  margin: 0;
  color: #2f3f52;
  font-size: 15px;
  line-height: 1.85;
}

.page-about .why-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .why-item {
  position: relative;
  padding: 20px 20px 20px 22px;
  background: var(--ink-700);
  border-left: 2px solid var(--cyan);
  clip-path: polygon(0 0, 100% 0, 100% 100%, var(--about-cut) 100%, 0 calc(100% - var(--about-cut)));
}

.page-about .why-num {
  display: block;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-about .why-item h3 {
  margin: 6px 0 8px;
  font-size: 17px;
  line-height: 1.35;
  color: var(--mist);
}

.page-about .why-item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--slate);
}

.page-about .why-link {
  display: inline-block;
  margin-top: 12px;
  font-size: 13.5px;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--cyan-dim);
  padding-bottom: 2px;
}

.page-about .why-link:hover {
  color: var(--amber);
  border-bottom-color: var(--amber);
}

/* ---------- 团队标签页 ---------- */
.page-about .team-tabs {
  position: relative;
  margin-top: 26px;
  padding: 8px;
  background: var(--ink-800);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 28px), calc(100% - 28px) 100%, 0 100%);
}

.page-about .team-tab-input {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.page-about .team-tabbar {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  padding: 4px;
  scrollbar-width: thin;
}

.page-about .team-tab {
  flex: 1 0 auto;
  padding: 10px 16px;
  font-size: 13.5px;
  font-weight: 700;
  white-space: nowrap;
  text-align: center;
  color: var(--slate);
  background: transparent;
  border: 1px solid var(--line);
  cursor: pointer;
  transition: color 0.2s var(--ease), background 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .team-tab:hover {
  color: var(--mist);
  border-color: var(--line-strong);
}

.page-about #tab-edit:checked ~ .team-tabbar .team-tab[for="tab-edit"],
.page-about #tab-entry:checked ~ .team-tabbar .team-tab[for="tab-entry"],
.page-about #tab-care:checked ~ .team-tabbar .team-tab[for="tab-care"] {
  color: var(--ink-900);
  background: var(--cyan);
  border-color: var(--cyan);
}

.page-about #tab-edit:focus-visible ~ .team-tabbar .team-tab[for="tab-edit"],
.page-about #tab-entry:focus-visible ~ .team-tabbar .team-tab[for="tab-entry"],
.page-about #tab-care:focus-visible ~ .team-tabbar .team-tab[for="tab-care"] {
  outline: 2px solid var(--amber);
  outline-offset: 2px;
}

.page-about .team-panels {
  padding: 4px;
}

.page-about .team-panel {
  display: none;
  padding: 20px 14px 16px;
}

.page-about #tab-edit:checked ~ .team-panels .team-panel--edit,
.page-about #tab-entry:checked ~ .team-panels .team-panel--entry,
.page-about #tab-care:checked ~ .team-panels .team-panel--care {
  display: block;
}

.page-about .team-panel h3 {
  margin: 0 0 10px;
  font-size: 17.5px;
  line-height: 1.4;
  color: var(--mist);
}

.page-about .team-panel p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--slate);
}

.page-about .team-tasks {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about .team-tasks li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .team-tasks li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 2px;
  background: var(--amber);
}

.page-about .team-flow {
  margin-top: 16px;
  padding: 0 16px;
  background: var(--ink-800);
  border: 1px dashed var(--line-strong);
}

.page-about .team-flow > summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 0;
  font-size: 14.5px;
  font-weight: 700;
  color: var(--mist);
  cursor: pointer;
  list-style: none;
}

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

.page-about .team-flow > summary::after {
  content: "+";
  font-size: 20px;
  line-height: 1;
  color: var(--cyan);
}

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

.page-about .flow-steps {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .flow-steps li {
  padding: 12px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--slate);
  background: var(--ink-700);
  border-top: 2px solid var(--cyan);
}

.page-about .flow-steps .mono {
  display: block;
  font-size: 11.5px;
  letter-spacing: 0.12em;
  color: var(--cyan);
}

.page-about .flow-steps strong {
  display: block;
  margin: 4px 0 4px;
  font-size: 14px;
  color: var(--mist);
}

/* ---------- 时间轴 ---------- */
.page-about .timeline-head {
  display: grid;
  gap: 22px;
}

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

.page-about .timeline-figure img {
  display: block;
  width: 100%;
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% 100%, var(--about-cut) 100%, 0 calc(100% - var(--about-cut)));
}

.page-about .timeline-list {
  --tl-col: 62px;
  position: relative;
  list-style: none;
  margin: 34px 0 0;
  padding: 0;
  display: grid;
  gap: 26px;
}

.page-about .timeline-list::before {
  content: "";
  position: absolute;
  left: calc(var(--tl-col) - 1px);
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan) 0%, var(--cyan-dim) 40%, var(--amber) 100%);
  transform: skewX(-6deg);
  opacity: 0.85;
}

.page-about .timeline-item {
  position: relative;
  display: grid;
  grid-template-columns: var(--tl-col) minmax(0, 1fr);
  align-items: start;
}

.page-about .timeline-item::before {
  content: "";
  position: absolute;
  left: calc(var(--tl-col) - 6px);
  top: 6px;
  width: 10px;
  height: 10px;
  background: var(--ink-900);
  border: 2px solid var(--amber);
  transform: rotate(45deg);
}

.page-about .timeline-year {
  padding-right: 14px;
  text-align: right;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--cyan);
}

.page-about .timeline-body {
  padding-left: 20px;
}

.page-about .timeline-body h3 {
  margin: 0 0 8px;
  font-size: 16.5px;
  line-height: 1.4;
  color: var(--mist);
}

.page-about .timeline-body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--slate);
}

/* ---------- 引语 ---------- */
.page-about .about-quote blockquote {
  margin: 0;
  padding: 30px 24px;
  background: var(--paper);
  color: var(--deep-ink);
  border-left: 6px solid var(--amber);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
}

.page-about .about-quote p {
  margin: 0 0 14px;
  font-size: clamp(17px, 2.6vw, 23px);
  line-height: 1.65;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.page-about .about-quote footer {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: #52627a;
}

/* ---------- 分类体系 ---------- */
.page-about .taxonomy-grid {
  display: grid;
  gap: 22px;
  margin-top: 26px;
}

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

.page-about .taxonomy-block {
  padding: 20px 18px;
  background: var(--ink-800);
  border-top: 2px solid var(--line-strong);
}

.page-about .taxonomy-block--guide {
  border-top-color: var(--cyan);
}

.page-about .taxonomy-block--gift {
  border-top-color: var(--amber);
}

.page-about .taxonomy-block--help {
  border-top-color: var(--violet);
}

.page-about .taxonomy-block h3 {
  margin: 0 0 14px;
  font-size: 16px;
  line-height: 1.4;
  color: var(--mist);
}

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

.page-about .tag-list li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--slate);
}

.page-about .tag-list .tag {
  white-space: nowrap;
}

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

.page-about .taxonomy-figure img {
  display: block;
  width: 100%;
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}

/* ---------- 联系 ---------- */
.page-about .about-contact-grid {
  display: grid;
  gap: 22px;
}

.page-about .about-contact-card {
  padding: 28px 22px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--about-cut)), calc(100% - var(--about-cut)) 100%, 0 100%);
}

.page-about .about-contact-card .eyebrow {
  color: var(--deep-ink);
}

.page-about .about-contact-card h2 {
  margin: 10px 0 12px;
  font-size: clamp(21px, 3.2vw, 29px);
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--deep-ink);
}

.page-about .about-contact-card > p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: #2f3f52;
}

.page-about .contact-rows {
  list-style: none;
  margin: 20px 0 0;
  padding: 16px 0 0;
  display: grid;
  gap: 10px;
  border-top: 1px solid rgba(16, 28, 46, 0.16);
}

.page-about .contact-rows li {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
}

.page-about .contact-label {
  font-size: 12px;
  letter-spacing: 0.04em;
  color: #5b6a7d;
}

.page-about .contact-value {
  font-size: 14px;
  line-height: 1.7;
  color: var(--deep-ink);
  word-break: break-word;
}

.page-about .about-contact-card p.contact-tip {
  margin-top: 14px;
  font-size: 12.5px;
  line-height: 1.7;
  color: #5b6a7d;
}

.page-about .about-contact-card .btn {
  margin-top: 18px;
}

.page-about .about-side h2 {
  margin: 0 0 16px;
  font-size: clamp(19px, 2.6vw, 25px);
  line-height: 1.35;
  color: var(--mist);
}

.page-about .side-link {
  display: grid;
  gap: 4px;
  margin-bottom: 10px;
  padding: 16px 18px;
  background: var(--ink-700);
  border-left: 2px solid var(--cyan);
  text-decoration: none;
  transition: transform 0.2s var(--ease), background 0.2s var(--ease);
}

.page-about .side-link span {
  font-size: 15px;
  font-weight: 700;
  color: var(--mist);
}

.page-about .side-link small {
  font-size: 13px;
  line-height: 1.65;
  color: var(--slate);
}

.page-about .side-link:hover {
  transform: translateY(-2px);
  background: var(--ink-600);
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-about .about-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-fact {
    padding: 20px 18px;
  }

  .page-about .about-fact-value {
    font-size: 28px;
  }

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

  .page-about .taxonomy-block--help {
    grid-column: 1 / -1;
  }

  .page-about .flow-steps {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 8px;
  }

  .page-about .team-panel {
    padding: 24px 20px 20px;
  }

  .page-about .about-why-lead,
  .page-about .about-contact-card {
    padding: 32px 28px;
  }
}

@media (min-width: 900px) {
  .page-about .about-intro {
    padding-top: calc(var(--header-h) + 64px);
    padding-bottom: 64px;
  }

  .page-about .about-intro-grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    gap: 48px;
  }

  .page-about .about-why-grid {
    grid-template-columns: minmax(0, 0.86fr) minmax(0, 1.14fr);
    gap: 34px;
    align-items: start;
  }

  .page-about .timeline-head {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.78fr);
    gap: 40px;
    align-items: center;
  }

  .page-about .timeline-list {
    --tl-col: 116px;
    gap: 32px;
  }

  .page-about .timeline-year {
    font-size: 19px;
  }

  .page-about .timeline-body h3 {
    font-size: 18px;
  }

  .page-about .about-quote blockquote {
    padding: 40px 44px;
  }
}

@media (min-width: 960px) {
  .page-about .taxonomy-grid {
    grid-template-columns: minmax(0, 1.24fr) minmax(0, 0.76fr);
    gap: 30px;
    align-items: start;
  }

  .page-about .about-contact-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 34px;
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .side-link,
  .page-about .team-tab {
    transition: none;
  }

  .page-about .side-link:hover {
    transform: none;
  }
}
<<<END>>>