.page-about {
  --about-felt: linear-gradient(142deg, #2A1B54 0%, #4B2BA8 58%, #14101F 100%);
  --about-paper-2: #FBF6EC;
  --about-soft: rgba(20, 16, 31, 0.06);
  background: var(--paper);
  color: var(--ink);
  overflow-x: clip;
}

.page-about .about-crumb {
  padding-top: clamp(14px, 2vw, 22px);
}

.page-about .section {
  padding-block: clamp(44px, 6vw, 92px);
}

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

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  background: var(--about-felt);
  color: var(--paper);
  padding: clamp(32px, 5vw, 68px) 0 clamp(36px, 5vw, 72px);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image: repeating-linear-gradient(115deg, rgba(246, 239, 227, 0.06) 0 1px, transparent 1px 9px);
}

.page-about .about-hero__ghost {
  position: absolute;
  right: -3%;
  bottom: -10%;
  z-index: 0;
  font-family: var(--font-sans);
  font-weight: 200;
  font-size: clamp(120px, 26vw, 300px);
  line-height: 0.78;
  letter-spacing: -0.06em;
  color: rgba(255, 194, 75, 0.11);
  pointer-events: none;
  user-select: none;
}

.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(20px, 4vw, 40px);
}

.page-about .about-hero__main {
  max-width: 760px;
}

.page-about .about-hero .eyebrow {
  color: rgba(246, 239, 227, 0.72);
}

.page-about .about-hero .eyebrow .mono {
  color: var(--gold);
}

.page-about .about-hero__title {
  margin: 0.18em 0 0;
  font-size: clamp(30px, 5.4vw, 62px);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.025em;
}

.page-about .about-hero__lede {
  margin-top: clamp(16px, 2.4vw, 24px);
  max-width: 56ch;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.8;
  color: rgba(246, 239, 227, 0.82);
}

.page-about .hero-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(24px, 3.6vw, 40px);
  border: 1px solid rgba(246, 239, 227, 0.18);
  border-radius: var(--radius);
  overflow: hidden;
  background: rgba(246, 239, 227, 0.18);
}

.page-about .hero-stats__cell {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 16px;
  background: rgba(20, 16, 31, 0.62);
}

.page-about .hero-stats__num {
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 600;
  color: var(--gold);
  letter-spacing: -0.02em;
}

.page-about .hero-stats__label {
  font-size: 13px;
  line-height: 1.5;
  color: rgba(246, 239, 227, 0.66);
}

@media (min-width: 640px) {
  .page-about .hero-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 章节索引 ---------- */
.page-about .about-index {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: clamp(18px, 2.6vw, 28px) 0;
  border-bottom: 1px dashed var(--line);
}

.page-about .about-index a {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 7px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--about-paper-2);
  font-size: 14px;
  text-decoration: none;
  color: var(--ink);
  transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.page-about .about-index a .mono {
  font-size: 11px;
  color: var(--neon);
}

.page-about .about-index a:hover,
.page-about .about-index a:focus-visible {
  transform: translateY(-2px);
  border-color: var(--cyan);
  background: #fff;
}

/* ---------- 图文对开 ---------- */
.page-about .about-split {
  display: grid;
  gap: clamp(24px, 4vw, 52px);
  align-items: center;
}

.page-about .about-split__text p {
  margin-top: 14px;
  color: rgba(20, 16, 31, 0.78);
  line-height: 1.78;
}

.page-about .about-split__figure {
  width: 100%;
  margin: 0;
}

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

@media (min-width: 880px) {
  .page-about .about-split {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  }

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

.page-about .about-quote {
  position: relative;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 16px 20px;
  border-left: 4px solid var(--gold);
  border-radius: 0 var(--radius) var(--radius) 0;
  background: var(--about-paper-2);
  font-size: clamp(16px, 1.8vw, 19px);
  font-weight: 600;
  line-height: 1.6;
  color: var(--ink);
}

/* ---------- 时间线 ---------- */
.page-about .about-banner {
  margin: clamp(22px, 3.4vw, 38px) 0 clamp(24px, 3.6vw, 40px);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--felt);
}

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

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

.page-about .tl-item {
  display: grid;
  gap: 8px;
  padding: clamp(20px, 3vw, 32px) 0;
  border-top: 1px dashed var(--line);
}

.page-about .tl-item:last-child {
  border-bottom: 1px dashed var(--line);
}

@media (min-width: 800px) {
  .page-about .tl-item {
    grid-template-columns: minmax(150px, 220px) minmax(0, 1fr);
    gap: clamp(24px, 4vw, 60px);
    align-items: start;
  }
}

.page-about .tl-year {
  --dot: var(--cyan);
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-sans);
  font-weight: 200;
  font-size: clamp(38px, 7vw, 76px);
  line-height: 0.92;
  letter-spacing: -0.05em;
  color: var(--felt);
}

.page-about .tl-year::before {
  content: "";
  flex: 0 0 auto;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--dot);
  box-shadow: 0 0 0 4px rgba(18, 224, 210, 0.16);
}

.page-about .tl-item--b .tl-year { --dot: var(--gold); }
.page-about .tl-item--b .tl-year::before { box-shadow: 0 0 0 4px rgba(255, 194, 75, 0.2); }
.page-about .tl-item--c .tl-year { --dot: var(--rose); }
.page-about .tl-item--c .tl-year::before { box-shadow: 0 0 0 4px rgba(232, 54, 143, 0.18); }
.page-about .tl-item--d .tl-year { --dot: var(--green); }
.page-about .tl-item--d .tl-year::before { box-shadow: 0 0 0 4px rgba(31, 191, 122, 0.18); }

.page-about .tl-title {
  margin: 0;
  font-size: clamp(18px, 2.1vw, 23px);
  font-weight: 800;
  line-height: 1.4;
  letter-spacing: -0.01em;
}

.page-about .tl-body p {
  margin-top: 10px;
  max-width: 62ch;
  color: rgba(20, 16, 31, 0.76);
  line-height: 1.78;
}

.page-about .tl-more {
  margin-top: 12px;
}

.page-about .tl-more > summary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding-bottom: 3px;
  border-bottom: 1px solid currentColor;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--neon);
}

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

.page-about .tl-more > summary::after {
  content: "＋";
  font-size: 14px;
  line-height: 1;
}

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

.page-about .tl-more ul {
  margin: 12px 0 0;
  padding-left: 18px;
  display: grid;
  gap: 8px;
}

.page-about .tl-more li {
  font-size: 15px;
  line-height: 1.72;
  color: rgba(20, 16, 31, 0.74);
  list-style: square;
}

/* ---------- 团队 ---------- */
.page-about .team-bar {
  display: flex;
  height: clamp(64px, 9vw, 104px);
  margin-top: clamp(22px, 3vw, 34px);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .team-bar__seg {
  display: block;
  transition: filter 0.25s ease;
}

.page-about .team-bar__seg:hover {
  filter: brightness(1.15);
}

.page-about .team-bar__seg--a { flex: 30 1 0; background: var(--neon); }
.page-about .team-bar__seg--b { flex: 43 1 0; background: var(--felt); }
.page-about .team-bar__seg--c { flex: 20 1 0; background: var(--cyan); }
.page-about .team-bar__seg--d { flex: 7 1 0; background: var(--gold); }

.page-about .team-legend {
  display: grid;
  grid-template-columns: repeat(1, minmax(0, 1fr));
  gap: 14px;
  margin: clamp(16px, 2.4vw, 24px) 0 0;
  padding: 0;
  list-style: none;
}

@media (min-width: 640px) {
  .page-about .team-legend {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1040px) {
  .page-about .team-legend {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .team-legend__item {
  display: grid;
  gap: 6px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-top: 3px solid var(--lilac);
  border-radius: var(--radius);
  background: var(--about-paper-2);
}

.page-about .team-legend__item--a { border-top-color: var(--neon); }
.page-about .team-legend__item--b { border-top-color: var(--felt); }
.page-about .team-legend__item--c { border-top-color: var(--cyan); }
.page-about .team-legend__item--d { border-top-color: var(--gold); }

.page-about .team-legend__num {
  font-size: 26px;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -0.02em;
}

.page-about .team-legend__role {
  font-size: 15px;
  font-weight: 800;
}

.page-about .team-legend__desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--warm);
}

.page-about .about-split--reverse {
  margin-top: clamp(32px, 4.6vw, 60px);
}

/* ---------- 标签 ---------- */
.page-about .tag-grid {
  display: grid;
  grid-template-columns: repeat(1, minmax(0, 1fr));
  gap: clamp(14px, 2.2vw, 20px);
  margin-top: clamp(22px, 3vw, 34px);
}

@media (min-width: 760px) {
  .page-about .tag-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .tag-card {
  padding: clamp(18px, 2.4vw, 26px);
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--about-paper-2);
  border-bottom: 4px solid var(--lilac);
  transition: transform 0.25s ease, border-color 0.25s ease;
}

.page-about .tag-card:hover {
  transform: translateY(-4px);
}

.page-about .tag-card--cyan { border-bottom-color: var(--cyan); }
.page-about .tag-card--gold { border-bottom-color: var(--gold); }
.page-about .tag-card--rose { border-bottom-color: var(--rose); }

.page-about .tag-card__index {
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--warm);
}

.page-about .tag-card__title {
  margin: 10px 0 0;
  font-size: clamp(24px, 3vw, 30px);
  font-weight: 800;
  letter-spacing: -0.02em;
}

.page-about .tag-card p {
  margin-top: 10px;
  font-size: 15px;
  line-height: 1.74;
  color: rgba(20, 16, 31, 0.74);
}

.page-about .tag-note {
  margin-top: clamp(18px, 2.6vw, 28px);
  max-width: 66ch;
  padding-left: 16px;
  border-left: 3px solid var(--cyan);
  font-size: 15px;
  line-height: 1.76;
  color: rgba(20, 16, 31, 0.76);
}

.page-about .tag-note a {
  color: var(--neon);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 补录节奏 ---------- */
.page-about .about-cadence {
  display: grid;
  gap: clamp(22px, 3.4vw, 48px);
  align-items: center;
}

@media (min-width: 860px) {
  .page-about .about-cadence {
    grid-template-columns: minmax(180px, 0.55fr) minmax(0, 1.45fr);
  }
}

.page-about .about-cadence__figure {
  padding: clamp(22px, 3vw, 34px);
  border-radius: var(--radius-lg);
  background: var(--about-felt);
  color: var(--paper);
  text-align: center;
}

.page-about .about-cadence__big {
  font-size: clamp(72px, 12vw, 132px);
  font-weight: 600;
  line-height: 0.86;
  letter-spacing: -0.05em;
  color: var(--gold);
}

.page-about .about-cadence__unit {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: rgba(246, 239, 227, 0.68);
}

.page-about .about-cadence__text p {
  margin-top: 14px;
  max-width: 64ch;
  color: rgba(20, 16, 31, 0.78);
  line-height: 1.78;
}

.page-about .about-cadence__text a {
  color: var(--neon);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-cadence__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

/* ---------- 覆盖 ---------- */
.page-about .reach-stats {
  display: grid;
  grid-template-columns: repeat(1, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(20px, 3vw, 32px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--line);
}

@media (min-width: 620px) {
  .page-about .reach-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 980px) {
  .page-about .reach-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .reach-stats__cell {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: clamp(18px, 2.4vw, 26px);
  background: var(--about-paper-2);
}

.page-about .reach-stats__num {
  font-size: clamp(24px, 3.2vw, 34px);
  font-weight: 600;
  letter-spacing: -0.03em;
  color: var(--neon);
}

.page-about .reach-stats__label {
  font-size: 14px;
  color: var(--warm);
}

.page-about .reach-partners {
  margin-top: clamp(24px, 3.4vw, 40px);
  padding: clamp(20px, 2.8vw, 30px);
  border-radius: var(--radius);
  background: var(--about-soft);
}

.page-about .reach-partners p {
  margin-top: 10px;
  max-width: 70ch;
  line-height: 1.78;
  color: rgba(20, 16, 31, 0.78);
}

/* ---------- 认可 ---------- */
.page-about .honor-list {
  margin: clamp(18px, 2.6vw, 26px) 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.page-about .honor-list li {
  position: relative;
  padding-left: 30px;
  font-size: 15px;
  line-height: 1.72;
  color: rgba(20, 16, 31, 0.78);
}

.page-about .honor-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  width: 14px;
  height: 14px;
  border-radius: 4px;
  background: var(--green);
  box-shadow: inset 0 0 0 2px var(--paper);
}

.page-about .about-split__side {
  display: grid;
  gap: 4px;
  padding: clamp(20px, 3vw, 32px);
  border-radius: var(--radius-lg);
  background: var(--about-felt);
  color: var(--paper);
}

.page-about .about-side__label {
  margin-top: 14px;
  font-size: 11px;
  letter-spacing: 0.12em;
  color: rgba(246, 239, 227, 0.58);
}

.page-about .about-side__label:first-child {
  margin-top: 0;
}

.page-about .about-side__value {
  font-family: var(--font-sans);
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 200;
  line-height: 1.1;
  letter-spacing: -0.04em;
  color: var(--gold);
}

/* ---------- 结尾 ---------- */
.page-about .about-cta {
  padding-bottom: clamp(52px, 7vw, 100px);
}

.page-about .about-cta__inner {
  display: grid;
  gap: clamp(20px, 3vw, 34px);
  padding: clamp(24px, 3.6vw, 44px);
}

@media (min-width: 900px) {
  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
    align-items: center;
  }
}

.page-about .about-cta__title {
  margin: 0;
  font-size: clamp(24px, 3.4vw, 38px);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .about-cta__text p {
  margin-top: 12px;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(246, 239, 227, 0.76);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-index a,
  .page-about .tag-card,
  .page-about .team-bar__seg {
    transition: none;
  }

  .page-about .about-index a:hover,
  .page-about .tag-card:hover {
    transform: none;
  }
}