.page-about {
  --about-rule: rgba(127, 245, 230, 0.14);
  --about-rule-strong: rgba(22, 224, 196, 0.4);
  --about-gap: clamp(20px, 3.5vw, 40px);
}

.page-about img {
  max-width: 100%;
  display: block;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: clamp(18px, 3vw, 34px) 0 clamp(38px, 6vw, 78px);
}

.page-about .about-hero__inner {
  display: grid;
  gap: clamp(26px, 4vw, 52px);
}

.page-about .about-index {
  position: relative;
  margin: 14px 0 0;
  padding: 0 0 0 22px;
  list-style: none;
}

.page-about .about-index::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan), rgba(127, 245, 230, 0.06));
}

.page-about .about-index li {
  position: relative;
  margin-bottom: 18px;
}

.page-about .about-index li:last-child {
  margin-bottom: 0;
}

.page-about .about-index li::before {
  content: "";
  position: absolute;
  left: -22px;
  top: 6px;
  width: 9px;
  height: 9px;
  background: var(--ink);
  border: 1px solid var(--cyan);
  transform: rotate(45deg);
}

.page-about .about-index a {
  display: block;
  color: var(--text-soft);
  text-decoration: none;
  font-size: 14px;
  line-height: 1.5;
  transition: color 0.2s var(--ease);
}

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

.page-about .about-index .mono {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--amber);
  margin-bottom: 2px;
}

.page-about .about-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(36px, 8.2vw, 78px);
  line-height: 0.98;
  letter-spacing: -0.015em;
  margin: 0 0 20px;
  color: var(--paper);
}

.page-about .about-hero__main .lede {
  margin: 0;
  max-width: 60ch;
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 1px;
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
  background: var(--about-rule);
  border: 1px solid var(--about-rule);
}

.page-about .about-stats li {
  background: var(--ink-2);
  padding: 16px 18px;
}

.page-about .about-stats b {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 600;
  color: var(--amber);
  letter-spacing: 0.01em;
  margin-bottom: 4px;
}

.page-about .about-stats span {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.5;
}

/* ---------- 图片框 ---------- */
.page-about .about-shot {
  position: relative;
  margin: 0;
  overflow: hidden;
  background: var(--ink-2);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
}

.page-about .about-shot img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .about-shot--hero img {
  aspect-ratio: 14 / 9;
}

.page-about .about-shot--timeline img {
  aspect-ratio: 2 / 1;
}

.page-about .about-shot--team img {
  aspect-ratio: 3 / 2;
}

.page-about .about-shot__caption {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 8px 14px;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--ink);
  background: var(--cyan);
  font-family: var(--font-mono);
}

/* ---------- 起点章节 ---------- */
.page-about .about-origin__inner {
  display: grid;
  gap: var(--about-gap);
}

.page-about .about-origin__text .section-title {
  margin-top: 8px;
}

.page-about .about-origin__text p {
  color: var(--text-soft);
  font-size: 16px;
  line-height: 1.78;
  margin: 0 0 16px;
}

.page-about .about-origin__note {
  align-self: start;
  padding: 22px 22px 24px;
  background: var(--ink-2);
  border-left: 3px solid var(--wine);
}

.page-about .about-origin__note-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--amber);
  margin: 0 0 10px;
}

.page-about .about-origin__note p {
  margin: 0 0 16px;
  font-size: 14px;
  line-height: 1.72;
  color: var(--text-soft);
}

.page-about .about-arrow {
  display: inline-block;
  font-size: 13px;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--about-rule-strong);
  padding-bottom: 2px;
}

.page-about .about-arrow:hover,
.page-about .about-arrow:focus-visible {
  color: var(--cyan-soft);
}

/* ---------- 章节头 ---------- */
.page-about .about-head {
  display: grid;
  gap: var(--about-gap);
  margin-bottom: clamp(24px, 4vw, 44px);
}

.page-about .about-head__text .section-title {
  margin-top: 8px;
}

.page-about .about-head__text .lede {
  margin: 14px 0 0;
  max-width: 58ch;
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--about-rule);
}

.page-about .about-timeline__item {
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-timeline__panel {
  position: relative;
}

.page-about .about-timeline__panel::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: transparent;
  transition: background 0.25s var(--ease);
}

.page-about .about-timeline__panel[open]::before,
.page-about .about-timeline__panel:hover::before {
  background: var(--amber);
}

.page-about .about-timeline__summary {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: baseline;
  gap: 14px;
  padding: 18px 6px 18px 16px;
  cursor: pointer;
  list-style: none;
  transition: background 0.25s var(--ease);
}

.page-about .about-timeline__summary::-webkit-details-marker {
  display: none;
}

.page-about .about-timeline__summary:hover {
  background: rgba(22, 224, 196, 0.05);
}

.page-about .about-timeline__year {
  font-family: var(--font-mono);
  font-size: clamp(20px, 3.4vw, 30px);
  font-weight: 600;
  color: var(--amber);
  letter-spacing: 0.02em;
  line-height: 1;
}

.page-about .about-timeline__label {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(17px, 2.4vw, 24px);
  color: var(--paper);
  line-height: 1.2;
}

.page-about .about-timeline__caret {
  width: 10px;
  height: 10px;
  border-right: 2px solid var(--muted);
  border-bottom: 2px solid var(--muted);
  transform: rotate(45deg);
  transition: transform 0.25s var(--ease), border-color 0.25s var(--ease);
  align-self: center;
}

.page-about .about-timeline__panel[open] .about-timeline__caret {
  transform: rotate(-135deg);
  border-color: var(--cyan);
}

.page-about .about-timeline__body {
  padding: 0 6px 22px 16px;
}

.page-about .about-timeline__body p {
  margin: 0;
  max-width: 66ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--text-soft);
}

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

.page-about .about-team__body .section-title {
  margin-top: 8px;
}

.page-about .about-team__body .prose {
  margin: 14px 0 0;
  color: var(--text-soft);
}

.page-about .about-mix {
  display: flex;
  height: 12px;
  margin: 26px 0 6px;
  overflow: hidden;
}

.page-about .about-mix__seg {
  display: block;
  height: 100%;
}

.page-about .about-mix__seg--a { flex: 6 1 0; background: var(--cyan); }
.page-about .about-mix__seg--b { flex: 9 1 0; background: var(--cyan-soft); }
.page-about .about-mix__seg--c { flex: 9 1 0; background: var(--amber); }
.page-about .about-mix__seg--d { flex: 4 1 0; background: var(--wine); }

.page-about .about-roles {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--about-rule);
  border: 1px solid var(--about-rule);
}

.page-about .about-role {
  background: var(--ink-2);
  padding: 18px 18px 20px;
}

.page-about .about-role__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 600;
  color: var(--amber);
  line-height: 1;
  margin-bottom: 8px;
}

.page-about .about-role__name {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--paper);
  margin: 0 0 8px;
}

.page-about .about-role p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

.page-about .about-check {
  margin-top: 22px;
  padding: 18px 20px;
  border-left: 3px solid var(--cyan);
  background: linear-gradient(90deg, rgba(22, 224, 196, 0.1), transparent 70%);
}

.page-about .about-check__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  color: var(--paper);
}

.page-about .about-check p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-soft);
}

/* ---------- 合作生态 ---------- */
.page-about .about-eco {
  background: var(--wine);
  clip-path: polygon(0 32px, 100% 0, 100% 100%, 0 100%);
  padding-top: clamp(64px, 8vw, 108px);
}

.page-about .about-eco .lede {
  color: var(--paper);
}

.page-about .about-eco .eyebrow {
  color: var(--cyan-soft);
}

.page-about .about-legend {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: rgba(244, 247, 242, 0.18);
}

.page-about .about-legend__item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 16px;
  background: rgba(7, 31, 26, 0.42);
  padding: 20px 18px;
  transition: background 0.25s var(--ease);
}

.page-about .about-legend__item:hover {
  background: rgba(7, 31, 26, 0.66);
}

.page-about .about-legend__key {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--amber);
  padding-top: 3px;
}

.page-about .about-legend__name {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  color: var(--paper);
  letter-spacing: 0.02em;
}

.page-about .about-legend__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: rgba(244, 247, 242, 0.82);
}

.page-about .about-honor {
  margin-top: 26px;
  border-top: 1px solid rgba(244, 247, 242, 0.22);
}

.page-about .about-honor__summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 2px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  color: var(--paper);
}

.page-about .about-honor__summary::-webkit-details-marker {
  display: none;
}

.page-about .about-honor__caret {
  width: 9px;
  height: 9px;
  border-right: 2px solid var(--cyan-soft);
  border-bottom: 2px solid var(--cyan-soft);
  transform: rotate(45deg);
  transition: transform 0.25s var(--ease);
  flex: none;
}

.page-about .about-honor[open] .about-honor__caret {
  transform: rotate(-135deg);
}

.page-about .about-honor__body p {
  margin: 0 0 20px;
  max-width: 64ch;
  font-size: 14px;
  line-height: 1.78;
  color: rgba(244, 247, 242, 0.86);
}

/* ---------- 服务范围 ---------- */
.page-about .about-scope__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1px;
  background: var(--about-rule);
  border: 1px solid var(--about-rule);
  margin-bottom: clamp(24px, 4vw, 40px);
}

.page-about .about-scope__figure {
  background: var(--ink-3);
  padding: 22px 18px 20px;
}

.page-about .about-scope__figure-num {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: clamp(28px, 4.4vw, 42px);
  font-weight: 600;
  line-height: 1;
  color: var(--cyan);
  letter-spacing: -0.01em;
}

.page-about .about-scope__figure-label {
  margin: 0;
  font-size: 13px;
  color: var(--muted);
}

.page-about .about-scope__body {
  max-width: 68ch;
}

.page-about .about-scope__body p {
  color: var(--text-soft);
  font-size: 16px;
  line-height: 1.78;
  margin: 0 0 16px;
}

.page-about .about-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 34px);
}

/* ---------- 桌面栅格 ---------- */
@media (min-width: 760px) {
  .page-about .about-head {
    grid-template-columns: minmax(0, 1fr) minmax(260px, 420px);
    align-items: align-end;
    align-items: end;
  }

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

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

@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(180px, 220px) minmax(0, 1fr);
    gap: clamp(32px, 5vw, 72px);
    align-items: start;
  }

  .page-about .about-origin__inner {
    grid-template-columns: minmax(0, 7fr) minmax(240px, 3fr);
    align-items: start;
  }

  .page-about .about-shot--hero {
    grid-column: 1 / -1;
  }

  .page-about .about-team__inner {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
    gap: clamp(32px, 4vw, 56px);
  }

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

  .page-about .about-timeline__summary {
    padding-left: 22px;
  }

  .page-about .about-timeline__body {
    padding-left: 22px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-index a,
  .page-about .about-timeline__summary,
  .page-about .about-timeline__caret,
  .page-about .about-honor__caret,
  .page-about .about-legend__item {
    transition: none;
  }
}
<<<END>>>
<<<END>>>

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