.page-about {
  --about-line: rgba(138, 217, 198, 0.18);
  --about-ink-text: rgba(232, 226, 217, 0.82);
  --about-dark-text: rgba(16, 22, 20, 0.78);
  background: var(--ink);
  color: var(--warm);
  overflow-x: clip;
}

/* ============ 首屏 ============ */
.page-about .about-hero {
  position: relative;
  padding: clamp(36px, 7vw, 96px) 0 clamp(44px, 7vw, 92px);
  background:
    radial-gradient(130% 100% at 92% -12%, rgba(40, 240, 194, 0.16), transparent 58%),
    linear-gradient(168deg, var(--ink-2) 0%, var(--ink) 64%);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -20%;
  right: -18%;
  width: min(76vw, 660px);
  aspect-ratio: 1 / 1;
  background: linear-gradient(146deg, rgba(255, 177, 59, 0.22), rgba(40, 240, 194, 0.07) 62%, transparent 88%);
  border-radius: 58% 42% 46% 54% / 48% 56% 44% 52%;
  transform: rotate(-14deg);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(138, 217, 198, 0.06) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(138, 217, 198, 0.06) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.65), transparent 72%);
  pointer-events: none;
}

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

.page-about .about-hero .breadcrumb {
  margin-bottom: clamp(18px, 3vw, 30px);
}

.page-about .about-hero h1 {
  margin: 14px 0 0;
  max-width: 14em;
  font-family: var(--font-sans);
  font-size: clamp(34px, 6.2vw, 88px);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.04em;
  color: var(--paper);
  text-wrap: balance;
}

.page-about .about-hero-lede {
  margin: clamp(18px, 2.6vw, 28px) 0 0;
  max-width: 40em;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.9;
  color: var(--about-ink-text);
}

.page-about .about-hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(22px, 3vw, 34px);
}

/* ============ 通用区块 ============ */
.page-about .about-section {
  position: relative;
  padding: clamp(48px, 8vw, 104px) 0;
}

.page-about .about-section + .about-section {
  border-top: 1px solid var(--about-line);
}

.page-about .about-section--paper {
  background: var(--paper);
  color: var(--black);
  border-top-color: transparent;
}

.page-about .about-section--warm {
  background: var(--warm);
  color: var(--black);
  border-top-color: transparent;
}

.page-about .about-section h2 {
  margin: 0 0 clamp(14px, 2vw, 20px);
  font-family: var(--font-sans);
  font-size: clamp(25px, 3.6vw, 46px);
  font-weight: 800;
  line-height: 1.24;
  letter-spacing: -0.03em;
  color: var(--paper);
  text-wrap: balance;
}

.page-about .about-section--paper h2,
.page-about .about-section--warm h2 {
  color: var(--black);
}

.page-about .about-body p,
.page-about .about-head p {
  margin: 0 0 14px;
  font-size: 16px;
  line-height: 1.9;
  color: var(--about-ink-text);
}

.page-about .about-section--paper .about-body p,
.page-about .about-section--paper .about-head p,
.page-about .about-section--warm .about-body p,
.page-about .about-section--warm .about-head p,
.page-about .about-section--paper .about-lede,
.page-about .about-section--warm .about-lede {
  color: var(--about-dark-text);
}

.page-about .about-lede {
  font-size: clamp(16px, 1.6vw, 18px);
  font-weight: 500;
}

.page-about .about-head {
  max-width: 62em;
  margin-bottom: clamp(26px, 4vw, 44px);
}

.page-about .about-head .eyebrow {
  margin-bottom: 12px;
}

/* ============ 编号 + 内容双栏 ============ */
.page-about .about-row {
  display: grid;
  gap: clamp(18px, 3.5vw, 44px);
}

.page-about .about-rail {
  display: flex;
  align-items: baseline;
  gap: 14px;
}

.page-about .about-num {
  font-family: var(--font-mono);
  font-size: clamp(44px, 8vw, 96px);
  font-weight: 700;
  line-height: 0.86;
  letter-spacing: -0.06em;
  font-variant-numeric: tabular-nums;
  color: rgba(40, 240, 194, 0.22);
  -webkit-text-stroke: 1px rgba(40, 240, 194, 0.45);
}

.page-about .about-rail-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--cold);
}

.page-about .about-body p {
  max-width: 42em;
}

/* ============ 三张说明卡 ============ */
.page-about .about-notes {
  display: grid;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 34px);
}

.page-about .about-note {
  padding: 20px 22px;
  border: 1px solid var(--about-line);
  border-radius: var(--radius-m);
  background: rgba(18, 59, 51, 0.72);
  transition: transform 0.24s ease, border-color 0.24s ease, background 0.24s ease;
}

.page-about .about-note:hover {
  transform: translateY(-4px);
  border-color: rgba(40, 240, 194, 0.5);
  background: rgba(18, 59, 51, 0.92);
}

.page-about .about-note-title {
  margin: 0 0 8px;
  font-size: 15px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--cyan);
}

.page-about .about-note p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--about-ink-text);
}

/* ============ 版本时间线 ============ */
.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 26px;
  border-left: 1px solid var(--about-line);
  display: grid;
  gap: clamp(16px, 2.4vw, 28px);
}

.page-about .about-section--paper .about-timeline {
  border-left-color: rgba(16, 22, 20, 0.18);
}

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

.page-about .about-node::before {
  content: "";
  position: absolute;
  left: -31px;
  top: 24px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--amber);
  box-shadow: 0 0 0 4px rgba(255, 177, 59, 0.18);
}

.page-about .about-node details {
  border: 1px solid rgba(16, 22, 20, 0.16);
  border-radius: var(--radius-m);
  background: rgba(247, 244, 238, 0.86);
  overflow: hidden;
  transition: border-color 0.24s ease, background 0.24s ease;
}

.page-about .about-node details[open] {
  border-color: rgba(199, 122, 26, 0.55);
  background: var(--paper);
}

.page-about .about-node summary {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 16px;
  padding: 18px 20px;
  cursor: pointer;
}

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

.page-about .about-node summary:focus-visible {
  outline: 2px solid var(--caramel);
  outline-offset: -4px;
}

.page-about .about-node-ver {
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.8vw, 40px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.04em;
  font-variant-numeric: tabular-nums;
  color: var(--caramel);
}

.page-about .about-node-title {
  font-size: clamp(15px, 1.6vw, 18px);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--black);
}

.page-about .about-node-plus {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--caramel);
  transition: transform 0.24s ease;
}

.page-about .about-node details[open] .about-node-plus {
  transform: rotate(45deg);
}

.page-about .about-node-text {
  padding: 0 20px 20px;
  border-top: 1px solid rgba(16, 22, 20, 0.12);
  margin-top: 2px;
  padding-top: 14px;
}

.page-about .about-node-text p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.9;
  color: var(--about-dark-text);
}

.page-about .about-timeline-fig {
  margin-top: clamp(26px, 4vw, 44px);
}

/* ============ 团队 ============ */
.page-about .about-roles {
  list-style: none;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-role {
  padding: 20px 22px;
  border: 1px solid var(--about-line);
  border-radius: var(--radius-m);
  background: rgba(18, 59, 51, 0.6);
  transition: border-color 0.24s ease, background 0.24s ease, transform 0.24s ease;
}

.page-about .about-role:hover,
.page-about .about-role:focus-within {
  transform: translateY(-3px);
  border-color: rgba(40, 240, 194, 0.55);
  background: rgba(18, 59, 51, 0.92);
}

.page-about .about-role-tag {
  display: inline-block;
  margin-bottom: 10px;
  padding: 5px 14px;
  border-radius: var(--pill);
  border: 1px solid rgba(40, 240, 194, 0.42);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .about-role p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--about-ink-text);
}

.page-about .about-team-fig {
  margin-top: clamp(24px, 3.5vw, 38px);
}

/* ============ 覆盖与协作 ============ */
.page-about .about-reach {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  align-items: center;
}

.page-about .about-reach-text p {
  margin: 0 0 14px;
  font-size: 16px;
  line-height: 1.9;
  color: var(--about-dark-text);
}

.page-about .about-partners {
  list-style: none;
  margin: clamp(18px, 3vw, 28px) 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-partners li {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 10px 16px;
  border-radius: var(--pill);
  background: rgba(11, 43, 38, 0.9);
  border: 1px solid rgba(11, 43, 38, 0.9);
}

.page-about .about-partner-num {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--amber);
}

.page-about .about-partner-label {
  font-size: 13px;
  color: rgba(232, 226, 217, 0.88);
}

.page-about .about-reach-fig {
  margin: 0;
}

.page-about .about-stats {
  list-style: none;
  margin: clamp(28px, 4vw, 46px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px;
  border-radius: var(--radius-m);
  border: 1px solid rgba(16, 22, 20, 0.14);
  background: rgba(247, 244, 238, 0.72);
  transition: border-color 0.24s ease, transform 0.24s ease;
}

.page-about .about-stat:hover {
  transform: translateY(-3px);
  border-color: rgba(199, 122, 26, 0.55);
}

.page-about .about-stat-num {
  font-family: var(--font-mono);
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.04em;
  font-variant-numeric: tabular-nums;
  color: var(--caramel);
}

.page-about .about-stat-label {
  font-size: 13px;
  line-height: 1.6;
  color: rgba(16, 22, 20, 0.66);
}

/* ============ 荣誉与改进 ============ */
.page-about .about-honors {
  display: grid;
  gap: 14px;
  margin-top: clamp(22px, 3vw, 32px);
}

.page-about .about-honor {
  position: relative;
  padding: 22px 24px;
  border: 1px solid var(--about-line);
  border-radius: var(--radius-m);
  background: linear-gradient(150deg, rgba(18, 59, 51, 0.92), rgba(14, 51, 45, 0.7));
  overflow: hidden;
}

.page-about .about-honor::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 100%;
  background: linear-gradient(to bottom, var(--amber), rgba(255, 177, 59, 0.1));
}

.page-about .about-honor-year {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.2vw, 34px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.04em;
  font-variant-numeric: tabular-nums;
  color: var(--amber);
  margin-bottom: 10px;
}

.page-about .about-honor h3 {
  margin: 0 0 8px;
  font-size: clamp(15px, 1.6vw, 18px);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-honor p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--about-ink-text);
}

.page-about .about-closing {
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding-top: clamp(18px, 2.4vw, 26px);
  border-top: 1px dashed var(--about-line);
  font-size: 15px;
  line-height: 1.9;
  color: var(--about-ink-text);
  max-width: 46em;
}

.page-about .about-inline-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(18px, 2.5vw, 26px);
}

/* ============ 收尾 ============ */
.page-about .about-cta {
  position: relative;
  padding: clamp(48px, 8vw, 96px) 0 clamp(56px, 9vw, 112px);
  background:
    radial-gradient(110% 90% at 12% 110%, rgba(255, 177, 59, 0.16), transparent 58%),
    linear-gradient(160deg, var(--ink-2), var(--ink) 70%);
  border-top: 1px solid var(--about-line);
  overflow: hidden;
}

.page-about .about-cta h2 {
  margin: 0 0 14px;
  font-size: clamp(26px, 4vw, 52px);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -0.04em;
  color: var(--paper);
  text-wrap: balance;
}

.page-about .about-cta p {
  margin: 0 0 clamp(22px, 3vw, 32px);
  max-width: 44em;
  font-size: 16px;
  line-height: 1.9;
  color: var(--about-ink-text);
}

.page-about .about-cta-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ============ 图片容器 ============ */
.page-about .media-frame img {
  width: 100%;
  height: auto;
  max-width: 100%;
  display: block;
  object-fit: cover;
  border-radius: var(--radius-m);
}

.page-about .media-frame {
  border-radius: var(--radius-l);
}

.page-about .media-caption {
  display: block;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  color: var(--cold);
}

/* ============ 断点 ============ */
@media (min-width: 640px) {
  .page-about .about-notes {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

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

@media (min-width: 860px) {
  .page-about .about-reach {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  }
}

@media (min-width: 900px) {
  .page-about .about-row {
    grid-template-columns: minmax(120px, 176px) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-rail {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    position: sticky;
    top: 132px;
  }

  .page-about .about-hero h1 {
    max-width: 12em;
  }

  .page-about .about-node summary {
    padding: 20px 26px;
  }

  .page-about .about-node-text {
    padding: 16px 26px 22px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-note,
  .page-about .about-role,
  .page-about .about-stat,
  .page-about .about-node-plus,
  .page-about .about-node details {
    transition: none;
  }

  .page-about .about-note:hover,
  .page-about .about-role:hover,
  .page-about .about-role:focus-within,
  .page-about .about-stat:hover {
    transform: none;
  }
}