.page-about {
  --about-pad: clamp(42px, 7vw, 92px);
  background: var(--ink-900);
  color: var(--paper);
  overflow-x: hidden;
}

.page-about a:focus-visible,
.page-about button:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(20px, 4vw, 40px) 0 clamp(52px, 8vw, 96px);
  background:
    radial-gradient(120% 90% at 84% 6%, rgba(40, 242, 194, 0.14), transparent 58%),
    linear-gradient(168deg, var(--ink-800), var(--ink-900) 70%);
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(90deg, rgba(44, 91, 80, 0.4) 0 1px, transparent 1px 92px),
    repeating-linear-gradient(0deg, rgba(44, 91, 80, 0.24) 0 1px, transparent 1px 92px);
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.85), transparent 80%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.85), transparent 80%);
  opacity: 0.65;
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -14%;
  top: 10%;
  width: 58%;
  height: 80%;
  background: linear-gradient(135deg, rgba(40, 242, 194, 0.1), rgba(17, 68, 58, 0) 68%);
  transform: skewX(-14deg);
  pointer-events: none;
}

.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(26px, 5vw, 40px);
  margin-top: clamp(20px, 4vw, 34px);
}

.page-about .about-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1.06;
  font-size: clamp(32px, 7vw, 64px);
  max-width: 15em;
  text-wrap: balance;
}

.page-about .about-hero__lead {
  margin-top: 18px;
  max-width: 34em;
  color: var(--muted);
  font-size: clamp(15px, 1.9vw, 17px);
  line-height: 1.9;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

/* 巨型团队数字面板 */
.page-about .about-figure {
  position: relative;
  padding: clamp(20px, 3.4vw, 30px);
  background: linear-gradient(150deg, rgba(17, 68, 58, 0.92), rgba(10, 43, 36, 0.7));
  border: 2px solid var(--line);
  border-radius: var(--radius);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 28px), calc(100% - 28px) 100%, 0 100%);
}

.page-about .about-figure__eyebrow {
  display: block;
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--cyan-soft);
}

.page-about .about-figure__num {
  display: block;
  margin-top: 6px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(96px, 21vw, 164px);
  line-height: 0.82;
  letter-spacing: -0.07em;
  color: var(--cyan);
}

@supports ((-webkit-background-clip: text) or (background-clip: text)) {
  .page-about .about-figure__num {
    background: linear-gradient(180deg, var(--cyan-soft), var(--cyan) 46%, rgba(40, 242, 194, 0.3));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
  }
}

.page-about .about-figure__label {
  margin-top: 14px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-figure__meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.page-about .about-figure__meta b {
  display: block;
  font-family: var(--font-mono);
  font-size: 22px;
  color: var(--amber);
}

.page-about .about-figure__meta span {
  display: block;
  margin-top: 2px;
  font-size: 12px;
  color: var(--muted);
}

/* ---------- 通用章节 ---------- */
.page-about .about-section {
  padding-block: var(--about-pad);
  border-top: 1px solid rgba(44, 91, 80, 0.55);
}

.page-about .about-head {
  max-width: 48em;
  margin-bottom: clamp(22px, 3.6vw, 38px);
}

.page-about .about-head__title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.24;
  font-size: clamp(23px, 4.2vw, 37px);
  text-wrap: balance;
}

.page-about .about-head__text {
  margin-top: 14px;
  color: var(--muted);
  line-height: 1.9;
  font-size: 15px;
}

/* ---------- 品牌起点 ---------- */
.page-about .about-story__grid {
  display: grid;
  gap: clamp(22px, 4vw, 46px);
}

.page-about .about-story__text {
  color: var(--muted);
  line-height: 1.95;
  font-size: 15.5px;
}

.page-about .about-story__text + .about-story__text {
  margin-top: 14px;
}

.page-about .about-points {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-points li {
  position: relative;
  padding-left: 26px;
  color: var(--paper);
  font-size: 14.5px;
  line-height: 1.85;
}

.page-about .about-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.78em;
  width: 13px;
  height: 2px;
  background: var(--cyan);
}

.page-about .about-shot {
  border: 2px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

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

/* ---------- 团队编制 ---------- */
.page-about .about-team {
  background: linear-gradient(180deg, var(--ink-800), var(--ink-900) 82%);
}

.page-about .about-team__shot {
  margin: 0 0 clamp(26px, 4vw, 44px);
  border: 2px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-team__seg .seg-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .about-team__seg .seg-btn {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 14.5px;
  padding: 11px 18px;
  color: var(--muted);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  cursor: pointer;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.page-about .about-team__seg .seg-btn:hover {
  color: var(--paper);
  border-color: var(--cyan);
}

.page-about .about-team__seg .seg-btn[aria-selected="true"] {
  color: var(--ink-900);
  background: var(--cyan);
  border-color: var(--cyan);
}

.page-about .about-team__seg .seg-panel {
  margin-top: 20px;
  padding: clamp(20px, 3.4vw, 34px);
  background: rgba(17, 68, 58, 0.42);
  border: 1px solid var(--line);
  border-left: 3px solid var(--cyan);
  border-radius: var(--radius);
  animation: aboutFadeIn 0.26s var(--ease) both;
}

.page-about .about-team__seg .seg-panel[hidden] {
  display: none;
}

@keyframes aboutFadeIn {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.page-about .about-panel__grid {
  display: grid;
  gap: 20px;
}

.page-about .about-panel__title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: clamp(19px, 2.6vw, 22px);
  font-weight: 700;
  line-height: 1.45;
  color: var(--paper);
}

.page-about .about-panel__text {
  color: var(--muted);
  font-size: 15px;
  line-height: 1.9;
}

.page-about .about-panel__text + .about-panel__text {
  margin-top: 12px;
}

.page-about .about-panel__stats {
  display: grid;
  gap: 10px;
  align-content: start;
}

.page-about .about-panel__stat {
  padding: 12px 14px;
  background: rgba(4, 18, 15, 0.55);
  border: 1px solid var(--line);
  border-radius: 2px;
}

.page-about .about-panel__stat b {
  display: block;
  font-family: var(--font-mono);
  font-size: 20px;
  color: var(--cyan);
  letter-spacing: -0.02em;
}

.page-about .about-panel__stat span {
  display: block;
  margin-top: 4px;
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--muted);
}

/* ---------- 内容生产线 ---------- */
.page-about .about-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-step {
  position: relative;
  padding: 22px 18px 20px 20px;
  background: linear-gradient(160deg, rgba(17, 68, 58, 0.55), rgba(10, 43, 36, 0.32));
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.page-about .about-step::before {
  content: "";
  position: absolute;
  left: 0;
  top: 24px;
  width: 2px;
  height: 28px;
  background: var(--amber);
}

.page-about .about-step__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--amber);
}

.page-about .about-step__title {
  margin: 8px 0 10px;
  font-size: 19px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--paper);
}

.page-about .about-step__text {
  font-size: 14px;
  line-height: 1.85;
  color: var(--muted);
}

.page-about .about-step__out {
  display: inline-block;
  margin-top: 16px;
  padding: 4px 9px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--cyan-soft);
  background: rgba(4, 18, 15, 0.55);
  border: 1px solid rgba(44, 91, 80, 0.9);
  border-radius: 2px;
}

.page-about .about-flow__shot {
  margin: clamp(26px, 4vw, 44px) 0 0;
  border: 2px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

/* ---------- 覆盖范围 ---------- */
.page-about .about-stats {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-stat {
  padding: clamp(18px, 3vw, 26px);
  background: var(--ink-800);
}

.page-about .about-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(30px, 4.6vw, 42px);
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--paper);
}

.page-about .about-stat__num i {
  font-style: normal;
  font-size: 14px;
  letter-spacing: 0;
  color: var(--cyan);
  margin-left: 5px;
}

.page-about .about-stat__label {
  display: block;
  margin-top: 10px;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 发展历程 ---------- */
.page-about .about-history {
  background: linear-gradient(180deg, var(--ink-900), var(--ink-800) 70%, var(--ink-900));
}

.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 20px;
}

.page-about .about-timeline__item {
  position: relative;
  padding: 0 0 0 26px;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 8px;
  bottom: -20px;
  width: 1px;
  background: linear-gradient(180deg, var(--line), transparent);
}

.page-about .about-timeline__item::after {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--cyan);
}

.page-about .about-timeline__item:last-child::before {
  display: none;
}

.page-about .about-timeline__year {
  display: inline-block;
  padding: 3px 9px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.14em;
  color: var(--amber-soft);
  border: 1px solid rgba(244, 183, 64, 0.45);
  border-radius: 2px;
}

.page-about .about-timeline__title {
  margin: 11px 0 7px;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--paper);
}

.page-about .about-timeline__text {
  font-size: 14px;
  line-height: 1.85;
  color: var(--muted);
}

.page-about .about-history__note {
  margin-top: clamp(24px, 4vw, 38px);
  padding: 16px 18px;
  font-size: 14px;
  line-height: 1.9;
  color: var(--muted);
  background: rgba(17, 68, 58, 0.4);
  border-left: 3px solid var(--cyan-soft);
  border-radius: 2px;
}

.page-about .about-history__note a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(40, 242, 194, 0.5);
}

.page-about .about-history__note a:hover {
  color: var(--cyan-soft);
}

/* ---------- 合作生态 ---------- */
.page-about .about-partners__grid {
  display: grid;
  gap: clamp(24px, 4vw, 42px);
}

.page-about .about-partners__text {
  color: var(--muted);
  font-size: 15px;
  line-height: 1.95;
}

.page-about .about-partners__text + .about-partners__text {
  margin-top: 14px;
}

.page-about .about-partners__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 22px;
}

.page-about .about-chip {
  padding: 6px 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--cyan-soft);
  background: rgba(17, 68, 58, 0.42);
  border: 1px solid var(--line);
  border-radius: 2px;
}

.page-about .about-award {
  align-self: start;
  padding: clamp(20px, 3.2vw, 30px);
  background: linear-gradient(155deg, rgba(244, 183, 64, 0.14), rgba(10, 43, 36, 0.6));
  border: 2px solid rgba(244, 183, 64, 0.45);
  border-radius: var(--radius);
  clip-path: polygon(0 0, calc(100% - 22px) 0, 100% 22px, 100% 100%, 0 100%);
}

.page-about .about-award__year {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.18em;
  color: var(--amber);
}

.page-about .about-award__title {
  margin: 12px 0 10px;
  font-family: var(--font-display);
  font-size: clamp(19px, 2.6vw, 23px);
  font-weight: 800;
  line-height: 1.42;
  color: var(--paper);
}

.page-about .about-award__text {
  font-size: 13.5px;
  line-height: 1.85;
  color: var(--muted);
}

.page-about .about-cta {
  display: grid;
  gap: 18px;
  margin-top: clamp(28px, 5vw, 48px);
  padding: clamp(22px, 4vw, 38px);
  background: linear-gradient(120deg, rgba(244, 183, 64, 0.12), rgba(17, 68, 58, 0.5) 58%, rgba(10, 43, 36, 0.45));
  border: 1px solid var(--line);
  border-left: 4px solid var(--amber);
  border-radius: var(--radius);
}

.page-about .about-cta__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(19px, 3vw, 25px);
  font-weight: 800;
  line-height: 1.42;
  color: var(--paper);
}

.page-about .about-cta__text {
  margin-top: 10px;
  font-size: 14px;
  line-height: 1.85;
  color: var(--muted);
}

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

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

@media (min-width: 860px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    align-items: end;
    gap: clamp(28px, 5vw, 60px);
  }

  .page-about .about-story__grid {
    grid-template-columns: minmax(0, 1.04fr) minmax(0, 0.96fr);
    align-items: center;
  }

  .page-about .about-panel__grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.6fr);
    gap: 28px;
  }

  .page-about .about-partners__grid {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.7fr);
    align-items: start;
  }

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }

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

  .page-about .about-timeline__item {
    padding: 34px 22px 0 0;
  }

  .page-about .about-timeline__item::before {
    left: 0;
    right: 0;
    top: 13px;
    bottom: auto;
    width: auto;
    height: 1px;
    background: var(--line);
  }

  .page-about .about-timeline__item::after {
    display: none;
  }

  .page-about .about-timeline__item:last-child::before {
    display: block;
  }
}

@media (min-width: 1040px) {
  .page-about .about-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about .about-team__seg .seg-panel {
    animation: none;
  }

  .page-about * {
    transition-duration: 0.001ms;
  }
}