.page-about {
  --about-vpad: clamp(52px, 6.6vw, 100px);
  --about-gap: clamp(22px, 3vw, 44px);
  display: block;
  background-color: var(--ink);
  background-image: var(--scan);
  color: var(--on-dark);
  font-family: var(--font-sans);
}

.page-about .about-band--paper {
  background-color: var(--paper);
  background-image: none;
  color: var(--on-light);
}

.page-about h2 {
  margin: 0;
  font-size: clamp(26px, 3.6vw, 42px);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -0.02em;
}

.page-about .about-band-head {
  display: grid;
  gap: 12px;
  max-width: 74ch;
}

.page-about .about-band-index {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--on-dark-mute);
}

.page-about .about-band-index::before {
  content: "";
  flex: none;
  width: 24px;
  height: 3px;
  background: var(--spectrum);
}

.page-about .about-band--paper .about-band-index {
  color: var(--on-light-mute);
}

.page-about .about-band-lead {
  margin: 0;
  max-width: 68ch;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.8;
  color: var(--on-dark-mute);
}

.page-about .about-band--paper .about-band-lead {
  color: var(--on-light-mute);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(26px, 4vw, 52px) var(--about-vpad);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -30%;
  right: -18%;
  width: min(880px, 78vw);
  aspect-ratio: 1 / 1;
  background: repeating-conic-gradient(from 0deg, rgba(255, 46, 147, 0.14) 0deg 1.2deg, transparent 1.2deg 8deg);
  -webkit-mask-image: radial-gradient(circle at 50% 50%, #000 0%, transparent 62%);
  mask-image: radial-gradient(circle at 50% 50%, #000 0%, transparent 62%);
  pointer-events: none;
  z-index: 0;
}

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

.page-about .breadcrumbs {
  margin-bottom: clamp(20px, 3vw, 36px);
}

.page-about .breadcrumbs .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
}

.page-about .breadcrumbs .breadcrumb-item {
  color: var(--on-dark-mute);
}

.page-about .breadcrumbs .breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  margin-right: 8px;
  color: var(--violet);
}

.page-about .breadcrumbs a {
  color: var(--on-dark-mute);
  text-decoration: none;
}

.page-about .breadcrumbs a:hover {
  color: var(--green);
  text-decoration: underline;
}

.page-about .about-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--about-gap);
  align-items: end;
}

.page-about .about-hero-main {
  min-width: 0;
}

.page-about .about-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--green);
}

.page-about .about-eyebrow::before {
  content: "";
  flex: none;
  width: 30px;
  height: 2px;
  background: var(--spectrum);
}

.page-about .about-title {
  margin: 0;
  font-size: clamp(36px, 6.2vw, 82px);
  font-weight: 900;
  line-height: 1.04;
  letter-spacing: -0.02em;
}

.page-about .about-title-hl {
  background: var(--spectrum);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.page-about .about-lede {
  margin: 24px 0 0;
  max-width: 64ch;
  font-size: clamp(16px, 1.7vw, 18px);
  line-height: 1.85;
  color: var(--on-dark);
}

.page-about .about-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(26px, 3.4vw, 40px);
}

.page-about .about-hero-rail {
  position: relative;
  display: grid;
  gap: 16px;
  padding-left: 22px;
}

.page-about .about-hero-rail::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: var(--spectrum);
}

.page-about .rail-note {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--on-dark-mute);
}

.page-about .rail-note-key {
  display: block;
  margin-bottom: 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--amber);
}

/* ---------- 时间带 ---------- */
.page-about .about-timeline-section {
  position: relative;
  overflow: hidden;
  padding-block: var(--about-vpad);
  background-color: var(--ink-2);
  background-image: none;
}

.page-about .about-timeline-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.32;
  pointer-events: none;
  z-index: 0;
}

.page-about .about-timeline-section > .wrap,
.page-about .about-timeline-section > .about-timeline-rail {
  position: relative;
  z-index: 1;
}

.page-about .about-timeline-rail {
  margin-top: clamp(30px, 4vw, 56px);
  padding: 4px var(--gutter) 20px;
  overflow-x: auto;
  overflow-y: hidden;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: var(--violet) transparent;
}

.page-about .about-timeline-rail:focus-visible {
  outline: 2px solid var(--magenta);
  outline-offset: 4px;
  box-shadow: 0 0 0 4px var(--brown);
}

.page-about .about-timeline-rail::-webkit-scrollbar {
  height: 6px;
}

.page-about .about-timeline-rail::-webkit-scrollbar-track {
  background: var(--hair-dark);
}

.page-about .about-timeline-rail::-webkit-scrollbar-thumb {
  background: var(--violet);
}

.page-about .about-timeline {
  display: flex;
  min-width: max-content;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-tl-node {
  flex: 0 0 clamp(238px, 66vw, 300px);
  margin-right: clamp(14px, 2vw, 24px);
  padding-right: clamp(16px, 2.6vw, 32px);
  border-right: 1px solid var(--hair-dark);
  scroll-snap-align: start;
}

.page-about .about-tl-node::before {
  content: "";
  display: block;
  width: 100%;
  height: 3px;
  margin-bottom: 20px;
  background: linear-gradient(90deg, var(--node-c, var(--magenta)) 0%, rgba(244, 239, 230, 0.08) 90%);
}

.page-about .about-tl-node:nth-child(1) { --node-c: var(--amber); }
.page-about .about-tl-node:nth-child(2) { --node-c: var(--magenta); }
.page-about .about-tl-node:nth-child(3) { --node-c: var(--blue); }
.page-about .about-tl-node:nth-child(4) { --node-c: var(--green); }
.page-about .about-tl-node:nth-child(5) { --node-c: var(--blue); }
.page-about .about-tl-node:nth-child(6) { --node-c: var(--magenta); }

.page-about .about-tl-year {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.6vw, 34px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: 0.02em;
  color: var(--node-c, var(--magenta));
}

.page-about .about-tl-gen {
  display: inline-block;
  margin-top: 10px;
  padding: 3px 9px;
  border: 1px solid var(--hair-dark);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--on-dark);
}

.page-about .about-tl-text {
  margin: 14px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--on-dark-mute);
}

/* ---------- 员工规模 ---------- */
.page-about .about-scale {
  position: relative;
  overflow: hidden;
  padding-block: var(--about-vpad);
}

.page-about .about-gauge-wrap {
  position: relative;
  margin-top: clamp(30px, 4vw, 54px);
}

.page-about .about-gauge-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.12;
  pointer-events: none;
}

.page-about .about-gauge-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(16px, 2vw, 24px);
}

.page-about .about-gauge {
  background: var(--paper-2);
  border: var(--bd) solid var(--brown);
  box-shadow: var(--shadow-1);
  padding: clamp(18px, 2.2vw, 26px);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .about-gauge:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-2);
}

.page-about .about-gauge:focus-visible {
  outline: 2px solid var(--magenta);
  outline-offset: 2px;
  box-shadow: var(--shadow-2);
}

.page-about .about-gauge-idx {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--on-light-mute);
}

.page-about .about-gauge-title {
  margin: 0;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--on-light);
}

.page-about .about-gauge-range {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin: 16px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(30px, 4.4vw, 44px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.01em;
  color: var(--brown);
}

.page-about .about-gauge-dash {
  font-size: 0.68em;
  color: var(--on-light-mute);
}

.page-about .about-gauge-unit {
  font-size: 0.34em;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--on-light-mute);
}

.page-about .about-gauge-note {
  margin: 16px 0 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--on-light-mute);
}

.page-about .about-gauge-detail {
  margin: 0;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--on-light);
  border-top: 1px solid transparent;
  transition: max-height var(--dur-2) var(--ease), opacity var(--dur-2) var(--ease), margin-top var(--dur-2) var(--ease), padding-top var(--dur-2) var(--ease);
}

.page-about .about-gauge:hover .about-gauge-detail,
.page-about .about-gauge:focus-within .about-gauge-detail,
.page-about .about-gauge:focus-visible .about-gauge-detail {
  max-height: 180px;
  margin-top: 14px;
  padding-top: 14px;
  opacity: 1;
  border-top-color: var(--hair-light);
}

.page-about .about-trend-strip {
  position: relative;
  z-index: 1;
  height: clamp(56px, 8vw, 96px);
  margin-top: clamp(16px, 2.4vw, 28px);
}

.page-about .about-trend-strip svg {
  display: block;
  width: 100%;
  height: 100%;
}

/* ---------- 产能与基地 ---------- */
.page-about .about-base {
  padding-block: var(--about-vpad);
}

.page-about .about-base-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3.4vw, 44px);
  margin-top: clamp(28px, 3.6vw, 46px);
}

.page-about .about-base-table {
  min-width: 0;
}

.page-about .about-captable {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
  line-height: 1.6;
}

.page-about .about-captable th,
.page-about .about-captable td {
  border: 1px solid var(--hair-light);
  padding: 13px 14px;
  text-align: left;
  vertical-align: top;
}

.page-about .about-captable thead th {
  background: var(--brown);
  color: var(--paper);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  border-color: var(--brown);
}

.page-about .about-captable tbody th {
  font-weight: 700;
  color: var(--on-light);
  white-space: nowrap;
}

.page-about .about-captable .num {
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.page-about .about-captable tbody tr:hover {
  background: rgba(255, 46, 147, 0.07);
}

.page-about .about-base-figure {
  margin: 0;
}

.page-about .about-base-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: var(--bd) solid var(--brown);
  box-shadow: var(--shadow-1);
  object-fit: cover;
}

.page-about .about-base-figure figcaption {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--on-light-mute);
}

/* ---------- 资质与认证 ---------- */
.page-about .about-cert-section {
  padding-block: var(--about-vpad);
  background-color: var(--ink-2);
  background-image: none;
  color: var(--on-dark);
}

.page-about .about-cert-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(14px, 2vw, 22px);
  margin-top: clamp(28px, 3.6vw, 48px);
}

.page-about .about-cert {
  border: var(--bd) solid var(--hair-dark);
  background: rgba(255, 253, 248, 0.04);
  padding: clamp(16px, 2vw, 22px);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .about-cert:hover {
  border-color: var(--magenta);
  transform: translateY(-2px);
}

.page-about .about-cert summary {
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
  list-style: none;
}

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

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

.page-about .about-cert-kind {
  flex: none;
  padding: 3px 8px;
  border: 1px solid var(--amber);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--amber);
}

.page-about .about-cert-name {
  flex: 1 1 auto;
  min-width: 0;
  font-size: clamp(17px, 1.9vw, 21px);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--on-dark);
}

.page-about .about-cert-toggle {
  position: relative;
  flex: none;
  width: 16px;
  height: 16px;
}

.page-about .about-cert-toggle::before,
.page-about .about-cert-toggle::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 2px;
  background: var(--green);
  transform: translateY(-50%);
}

.page-about .about-cert-toggle::after {
  transform: translateY(-50%) rotate(90deg);
  transition: transform var(--dur-2) var(--ease), opacity var(--dur-2) var(--ease);
}

.page-about .about-cert[open] .about-cert-toggle::after {
  transform: translateY(-50%) rotate(0deg);
  opacity: 0;
}

.page-about .about-cert p {
  margin: 14px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--on-dark-mute);
}

.page-about .about-ip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1px;
  margin-top: clamp(24px, 3vw, 38px);
  border: var(--bd) solid var(--hair-dark);
}

.page-about .about-ip-item {
  padding: clamp(16px, 2vw, 24px);
  background: rgba(255, 253, 248, 0.03);
}

.page-about .about-ip-num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(28px, 3.6vw, 40px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.01em;
  color: var(--green);
}

.page-about .about-ip-label {
  margin: 10px 0 0;
  font-size: 13px;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: var(--on-dark-mute);
}

/* ---------- 团队构成 ---------- */
.page-about .about-roles {
  padding-block: var(--about-vpad);
}

.page-about .about-role-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(14px, 2vw, 20px);
  margin-top: clamp(28px, 3.6vw, 46px);
}

.page-about .about-role {
  position: relative;
  padding-top: clamp(20px, 2.4vw, 28px);
  border-top: 1px solid var(--hair-dark);
}

.page-about .about-role::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 64px;
  height: 3px;
  background: var(--role-c, var(--magenta));
}

.page-about .about-role:nth-child(1) { --role-c: var(--magenta); }
.page-about .about-role:nth-child(2) { --role-c: var(--blue); }
.page-about .about-role:nth-child(3) { --role-c: var(--green); }
.page-about .about-role:nth-child(4) { --role-c: var(--amber); }

.page-about .about-role-k {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--role-c, var(--magenta));
}

.page-about .about-role-v {
  margin: 12px 0 0;
  font-size: clamp(20px, 2.3vw, 26px);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--on-dark);
}

.page-about .about-role-d {
  margin: 14px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--on-dark-mute);
}

/* ---------- 合作生态 ---------- */
.page-about .about-eco {
  padding-block: var(--about-vpad) calc(var(--about-vpad) * 0.72);
}

.page-about .about-eco-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 56px);
}

.page-about .about-eco-lead {
  margin: 18px 0 24px;
  max-width: 52ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
  color: var(--on-dark-mute);
}

.page-about .about-eco-list {
  display: grid;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-eco-list li {
  display: grid;
  gap: 8px;
  padding: clamp(18px, 2.2vw, 24px) 0;
  border-top: 1px solid var(--hair-dark);
}

.page-about .about-eco-list li:last-child {
  border-bottom: 1px solid var(--hair-dark);
}

.page-about .about-eco-list h3 {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--on-dark);
}

.page-about .about-eco-list p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--on-dark-mute);
}

/* ---------- 收束 ---------- */
.page-about .about-cta {
  padding-block: clamp(34px, 5vw, 64px);
  background-color: var(--ink-2);
  border-top: 2px solid transparent;
  border-image: linear-gradient(90deg, var(--magenta) 0%, var(--blue) 48%, var(--green) 100%) 1;
}

.page-about .about-cta-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: clamp(18px, 3vw, 40px);
}

.page-about .about-cta-k {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--amber);
}

.page-about .about-cta-t {
  margin: 0;
  max-width: 56ch;
  font-size: clamp(16px, 1.9vw, 20px);
  line-height: 1.7;
  color: var(--on-dark);
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-cert-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 680px) {
  .page-about .about-role-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

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

@media (min-width: 900px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 8fr) minmax(190px, 3fr);
    gap: clamp(28px, 4vw, 64px);
  }
}

@media (min-width: 960px) {
  .page-about .about-eco-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
    align-items: start;
  }
}

@media (min-width: 1000px) {
  .page-about .about-base-grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    align-items: start;
  }
}

@media (min-width: 1080px) {
  .page-about .about-cert-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-cert--wide {
    grid-column: span 2;
  }

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

@media (max-width: 699px) {
  .page-about .about-captable,
  .page-about .about-captable thead,
  .page-about .about-captable tbody,
  .page-about .about-captable tr,
  .page-about .about-captable th,
  .page-about .about-captable td {
    display: block;
    width: 100%;
  }

  .page-about .about-captable thead {
    display: none;
  }

  .page-about .about-captable tbody tr {
    margin-bottom: 14px;
    border: var(--bd) solid var(--brown);
    box-shadow: var(--shadow-1);
    background: var(--paper-2);
    padding: 6px 0;
  }

  .page-about .about-captable th,
  .page-about .about-captable td {
    border: 0;
    padding: 9px 14px;
    display: grid;
    grid-template-columns: 82px minmax(0, 1fr);
    gap: 10px;
    white-space: normal;
  }

  .page-about .about-captable th::before,
  .page-about .about-captable td::before {
    content: attr(data-th);
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.06em;
    color: var(--on-light-mute);
  }

  .page-about .about-captable tbody tr:hover {
    background: var(--paper-2);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-gauge,
  .page-about .about-cert,
  .page-about .about-gauge-detail,
  .page-about .about-cert-toggle::after {
    transition: none;
  }
}