.page-about {
  --about-line: rgba(207, 230, 219, 0.16);
  --about-line-ink: rgba(4, 16, 13, 0.14);
  background: var(--c-ink);
  color: var(--c-cream);
  overflow-x: clip;
}

/* ---------- 页头 ---------- */
.page-about .about-head {
  position: relative;
  overflow: hidden;
  padding: clamp(22px, 4vw, 38px) 0 clamp(44px, 7vw, 84px);
  background:
    radial-gradient(120% 90% at 88% -10%, rgba(53, 240, 164, 0.14), transparent 62%),
    linear-gradient(180deg, rgba(6, 21, 18, 0.97), var(--c-ink));
  border-bottom: 1px solid var(--line-dark);
}

.page-about .about-head::after {
  content: "";
  position: absolute;
  right: -6%;
  bottom: 0;
  width: 44%;
  height: 100%;
  pointer-events: none;
  background: repeating-linear-gradient(
    to top,
    transparent 0 20px,
    rgba(207, 230, 219, 0.075) 20px 21px
  );
  clip-path: polygon(42% 0, 100% 0, 100% 100%, 0 100%);
  opacity: 0.8;
}

.page-about .about-head .wrap {
  position: relative;
  z-index: 1;
}

.page-about .about-head .breadcrumb {
  margin-bottom: clamp(16px, 2.4vw, 26px);
}

.page-about .about-head .display-1 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-size: clamp(30px, 6.4vw, 62px);
  line-height: 1.1;
  font-weight: 800;
  letter-spacing: -0.015em;
  max-width: 18ch;
  color: var(--c-cream);
}

.page-about .about-head .lede {
  margin: clamp(16px, 2.4vw, 24px) 0 0;
  max-width: 60ch;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.8;
  color: var(--text-dim);
}

.page-about .head-index {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: clamp(22px, 3.6vw, 36px) 0 0;
  padding: 0;
}

.page-about .head-index a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 13px;
  font-size: 13px;
  line-height: 1.4;
  color: var(--c-cream);
  text-decoration: none;
  border: 1px solid var(--line-dark);
  background: rgba(207, 230, 219, 0.05);
  clip-path: var(--cut);
  transition: background 0.2s ease, border-color 0.2s ease;
}

.page-about .head-index a:hover,
.page-about .head-index a:focus-visible {
  background: rgba(53, 240, 164, 0.16);
  border-color: rgba(53, 240, 164, 0.5);
}

.page-about .head-index .mono {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--c-neon);
}

/* ---------- 通用区块 ---------- */
.page-about .about-block {
  position: relative;
  padding: clamp(48px, 7vw, 92px) 0;
}

.page-about .about-block--light {
  background: var(--c-cream);
  color: var(--c-black);
  --text-dim: rgba(4, 16, 13, 0.66);
  --text-faint: rgba(4, 16, 13, 0.42);
  --line-dark: rgba(4, 16, 13, 0.14);
}

.page-about .about-block--band {
  padding-top: clamp(36px, 5vw, 60px);
  border-top: 6px solid var(--c-moss);
}

.page-about .about-block--night {
  background:
    linear-gradient(180deg, var(--c-night), rgba(6, 21, 18, 0.92));
  border-top: 1px solid var(--line-dark);
  border-bottom: 1px solid var(--line-dark);
}

.page-about .about-block--deep {
  background:
    radial-gradient(100% 70% at 12% 0%, rgba(77, 107, 88, 0.28), transparent 65%),
    var(--c-ink);
  border-top: none;
}

.page-about .about-block .display-2 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: clamp(24px, 4vw, 40px);
  line-height: 1.22;
  font-weight: 800;
  letter-spacing: -0.01em;
  max-width: 24ch;
}

.page-about .eyebrow--ink {
  color: var(--c-clay);
}

.page-about .about-p {
  margin: 0 0 14px;
  font-size: clamp(15px, 1.7vw, 16.5px);
  line-height: 1.85;
  color: var(--text-dim);
}

.page-about .about-p--lead {
  margin-top: clamp(14px, 2vw, 18px);
  max-width: 64ch;
}

/* ---------- 起点 ---------- */
.page-about .origin-grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
}

.page-about .origin-copy .display-2 {
  margin-bottom: clamp(14px, 2vw, 20px);
}

.page-about .origin-media {
  margin: 0;
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 0 100%);
}

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

.page-about .origin-media .media__caption {
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.6;
  color: rgba(4, 16, 13, 0.55);
}

/* ---------- 编年史 ---------- */
.page-about .tl {
  list-style: none;
  margin: clamp(28px, 4vw, 46px) 0 0;
  padding: 0;
}

.page-about .tl__item {
  position: relative;
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  gap: 14px;
  padding-bottom: clamp(22px, 3.4vw, 34px);
}

.page-about .tl__item:last-child {
  padding-bottom: 0;
}

.page-about .tl__year {
  position: relative;
  padding-top: 2px;
}

.page-about .tl__year::before {
  content: "";
  position: absolute;
  top: 9px;
  right: 0;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--c-clay);
  box-shadow: 0 0 0 4px rgba(179, 106, 76, 0.16);
}

.page-about .tl__year::after {
  content: "";
  position: absolute;
  top: 22px;
  right: 4px;
  bottom: -18px;
  width: 1px;
  background: rgba(4, 16, 13, 0.16);
}

.page-about .tl__item:last-child .tl__year::after {
  display: none;
}

.page-about .tl__year .mono {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(14px, 1.7vw, 16px);
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--c-moss);
  padding-right: 18px;
}

.page-about .tl__body {
  padding: clamp(14px, 2vw, 20px) clamp(16px, 2.4vw, 26px);
  background: rgba(77, 107, 88, 0.075);
  border-left: 3px solid rgba(179, 106, 76, 0.65);
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 0 100%);
}

.page-about .tl__kicker {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-clay);
}

.page-about .tl__body h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: clamp(16.5px, 2vw, 21px);
  line-height: 1.4;
  font-weight: 700;
  color: var(--c-black);
}

.page-about .tl__body p {
  margin: 0;
  font-size: clamp(14.5px, 1.6vw, 15.5px);
  line-height: 1.8;
  color: rgba(4, 16, 13, 0.7);
}

.page-about .tl__tags {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 12px 0 0;
  padding: 0;
}

.page-about .tl__tags li {
  padding: 4px 9px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.02em;
  color: var(--c-ink);
  background: rgba(207, 230, 219, 0.8);
  border: 1px solid rgba(4, 16, 13, 0.1);
}

/* ---------- 内容方法 ---------- */
.page-about .methods-head .display-2 {
  max-width: 26ch;
}

.page-about .methods-head .about-p {
  margin-top: clamp(12px, 2vw, 18px);
  max-width: 60ch;
}

.page-about .methods-board {
  list-style: none;
  display: grid;
  gap: 1px;
  margin: clamp(24px, 4vw, 40px) 0 0;
  padding: 0;
  background: var(--line-dark);
  border: 1px solid var(--line-dark);
}

.page-about .methods-board > li {
  background: rgba(207, 230, 219, 0.035);
  padding: clamp(18px, 2.6vw, 28px);
}

.page-about .board-idx {
  display: inline-block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--c-neon);
}

.page-about .methods-board h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: clamp(16px, 2vw, 19px);
  line-height: 1.42;
  font-weight: 700;
  color: var(--c-cream);
}

.page-about .methods-board p {
  margin: 0;
  font-size: clamp(14.5px, 1.6vw, 15.5px);
  line-height: 1.8;
  color: var(--text-dim);
}

.page-about .methods-media {
  margin: clamp(24px, 4vw, 38px) 0 0;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%);
}

.page-about .methods-media .media__caption {
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--text-faint);
}

.page-about .methods-link {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 16px;
  margin-top: clamp(22px, 3.4vw, 32px);
  padding-top: clamp(18px, 2.6vw, 24px);
  border-top: 1px solid var(--line-dark);
}

.page-about .methods-link p {
  margin: 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-dim);
}

/* ---------- 团队 ---------- */
.page-about .team-list {
  margin-top: clamp(22px, 3.4vw, 34px);
  border-top: 1px solid var(--line-dark);
}

.page-about .team-list details {
  border-bottom: 1px solid var(--line-dark);
}

.page-about .team-list summary {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 12px;
  padding: clamp(14px, 2vw, 19px) 0;
  cursor: pointer;
  list-style: none;
  color: var(--c-cream);
  transition: color 0.2s ease;
}

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

.page-about .team-list summary:hover {
  color: var(--c-neon);
}

.page-about .team-list summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--c-neon);
}

.page-about .team-list details[open] summary::after {
  content: "—";
  font-size: 14px;
}

.page-about .team-list summary .mono {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--c-amber);
}

.page-about .team-name {
  font-family: var(--font-display);
  font-size: clamp(16px, 1.9vw, 19px);
  font-weight: 700;
  letter-spacing: 0.01em;
}

.page-about .team-body {
  padding: 0 0 clamp(16px, 2.2vw, 22px) 0;
}

.page-about .team-body p {
  margin: 0;
  max-width: 70ch;
  font-size: clamp(14.5px, 1.6vw, 15.5px);
  line-height: 1.85;
  color: var(--text-dim);
}

/* ---------- 覆盖与合作 ---------- */
.page-about .about-block--reach {
  background:
    linear-gradient(180deg, var(--c-ink), rgba(6, 21, 18, 0.98));
  border-top: 6px solid var(--c-neon);
}

.page-about .reach-grid {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: clamp(24px, 3.6vw, 36px) 0 0;
  padding: 0;
}

.page-about .reach-cell {
  padding: clamp(14px, 2vw, 18px);
  background: rgba(6, 21, 18, 0.6);
  border: 1px solid rgba(53, 240, 164, 0.2);
  clip-path: var(--cut);
}

.page-about .reach-cell .num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.4vw, 34px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--c-neon);
}

.page-about .reach-cell .unit {
  font-size: 0.55em;
  margin-left: 2px;
  color: rgba(53, 240, 164, 0.75);
}

.page-about .reach-label {
  display: block;
  margin-top: 9px;
  font-size: 12.5px;
  line-height: 1.5;
  letter-spacing: 0.02em;
  color: var(--text-dim);
}

.page-about .reach-media {
  margin: clamp(24px, 4vw, 40px) 0 0;
  clip-path: polygon(20px 0, 100% 0, 100% 100%, 0 100%, 0 20px);
}

.page-about .reach-media .media__caption {
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--text-faint);
}

.page-about .reach-subtitle {
  margin: clamp(28px, 4vw, 42px) 0 0;
  font-family: var(--font-display);
  font-size: clamp(17px, 2.2vw, 22px);
  font-weight: 700;
  color: var(--c-cream);
}

.page-about .partner-grid {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin: clamp(16px, 2.4vw, 22px) 0 0;
  padding: 0;
}

.page-about .partner-card {
  padding: clamp(14px, 2vw, 18px) clamp(14px, 2vw, 18px);
  background: rgba(207, 230, 219, 0.045);
  border-left: 2px solid rgba(179, 106, 76, 0.85);
}

.page-about .partner-card h4 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 15.5px;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--c-amber);
}

.page-about .partner-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-dim);
}

.page-about .reach-note {
  margin: clamp(16px, 2.4vw, 22px) 0 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--text-faint);
}

/* ---------- 荣誉与观察 ---------- */
.page-about .honor-inner {
  display: grid;
  gap: clamp(22px, 4vw, 44px);
}

.page-about .honor-inner .display-2 {
  margin-bottom: clamp(14px, 2vw, 20px);
}

.page-about .honor-actions {
  margin: clamp(16px, 2.4vw, 22px) 0 0;
}

.page-about .btn--ink {
  color: var(--c-ink);
  border-color: rgba(4, 16, 13, 0.35);
}

.page-about .honor-card {
  padding: clamp(18px, 2.6vw, 26px);
  background: var(--c-ink);
  color: var(--c-cream);
  border-top: 4px solid var(--c-amber);
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 0 100%);
}

.page-about .honor-card__mark {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--c-amber);
}

.page-about .honor-card__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: clamp(16px, 2vw, 19px);
  font-weight: 700;
  line-height: 1.4;
  color: var(--c-cream);
}

.page-about .honor-card__desc {
  margin: 0 0 14px;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--text-dim);
}

.page-about .honor-card__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
  border-top: 1px solid var(--line-dark);
  padding-top: 12px;
}

.page-about .honor-card__list li {
  position: relative;
  padding-left: 16px;
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--text-dim);
}

.page-about .honor-card__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  background: var(--c-neon);
  transform: rotate(45deg);
}

.page-about .about-tail {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: clamp(16px, 2.6vw, 24px);
  margin-top: clamp(34px, 5vw, 54px);
  padding: clamp(20px, 3vw, 30px);
  background: rgba(77, 107, 88, 0.12);
  border-left: 4px solid var(--c-clay);
}

.page-about .about-tail__title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: clamp(16px, 2vw, 19px);
  font-weight: 700;
  color: var(--c-black);
}

.page-about .about-tail__line {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: rgba(4, 16, 13, 0.66);
}

.page-about .about-tail__mail {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 8px 0 0;
}

.page-about .about-tail__mail .mono {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.01em;
  color: var(--c-ink);
  word-break: break-all;
}

.page-about .about-tail .copy-btn {
  padding: 5px 11px;
  font-size: 12.5px;
  color: var(--c-ink);
  background: transparent;
  border: 1px solid rgba(4, 16, 13, 0.3);
  cursor: pointer;
  clip-path: var(--cut);
}

.page-about .about-tail .copy-btn:hover,
.page-about .about-tail .copy-btn:focus-visible {
  background: rgba(4, 16, 13, 0.08);
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-about .partner-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-tail {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

@media (min-width: 860px) {
  .page-about .origin-grid {
    grid-template-columns: 1fr 1fr;
    align-items: start;
    gap: clamp(32px, 4.5vw, 60px);
  }

  .page-about .tl__item {
    grid-template-columns: 132px minmax(0, 1fr);
    gap: clamp(22px, 3vw, 44px);
  }

  .page-about .tl__year .mono {
    font-size: 20px;
    padding-right: 22px;
  }

  .page-about .tl__year::before {
    right: 4px;
  }

  .page-about .tl__year::after {
    right: 8px;
  }

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

@media (min-width: 1000px) {
  .page-about .reach-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .honor-inner {
    grid-template-columns: 7fr 5fr;
    align-items: start;
  }
}

@media (min-width: 1120px) {
  .page-about .reach-grid {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about .head-index a,
  .page-about .team-list summary {
    transition: none;
  }
}
<<<END>>>