.page-about {
  --about-line: rgba(30, 46, 71, 1);
  --about-paper-line: rgba(20, 28, 40, 0.16);
  --about-paper-muted: rgba(20, 28, 40, 0.72);
  background: var(--ink);
  color: var(--text);
  overflow-x: hidden;
}

.page-about .crumb-sep {
  margin: 0 8px;
  color: var(--grid);
}

.page-about .about-crumbs {
  position: relative;
  z-index: 2;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--muted);
  text-transform: uppercase;
  padding-bottom: clamp(18px, 3vw, 30px);
}

.page-about .about-crumbs a {
  color: var(--muted);
  text-decoration: none;
}

.page-about .about-crumbs a:hover {
  color: var(--mint);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  padding: clamp(18px, 3vw, 30px) 0 clamp(38px, 6vw, 76px);
  background:
    radial-gradient(115% 90% at 88% -12%, rgba(43, 227, 176, 0.16), transparent 62%),
    radial-gradient(90% 70% at 6% 110%, rgba(242, 178, 60, 0.10), transparent 60%),
    var(--ink);
  border-bottom: 1px solid var(--grid);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(to right, rgba(30, 46, 71, 0.75) 0 1px, transparent 1px 92px),
    repeating-linear-gradient(to bottom, rgba(30, 46, 71, 0.55) 0 1px, transparent 1px 92px);
  opacity: 0.5;
  pointer-events: none;
  -webkit-mask-image: linear-gradient(to bottom, #000 0%, transparent 88%);
  mask-image: linear-gradient(to bottom, #000 0%, transparent 88%);
}

.page-about .hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(26px, 5vw, 48px);
  min-width: 0;
}

.page-about .hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--muted);
  text-transform: uppercase;
}

.page-about .hero-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--mint);
  box-shadow: 0 0 0 4px rgba(43, 227, 176, 0.16);
}

.page-about .hero-title {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(34px, 6.4vw, 66px);
  line-height: 1.04;
  letter-spacing: -0.01em;
  color: var(--text);
  text-wrap: balance;
}

.page-about .hero-lede {
  max-width: 62ch;
  margin: 0 0 26px;
  font-size: 16px;
  line-height: 1.78;
  color: var(--muted);
}

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

.page-about .hero-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--grid);
  border: 1px solid var(--grid);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.page-about .fact {
  background: var(--panel);
  padding: 16px 14px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.page-about .fact-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(26px, 4vw, 34px);
  font-weight: 700;
  line-height: 1;
  color: var(--mint);
  letter-spacing: 0.02em;
}

.page-about .fact-unit {
  font-size: 15px;
  margin-left: 2px;
  color: var(--muted);
}

.page-about .fact-label {
  font-size: 13px;
  line-height: 1.5;
  color: var(--muted);
}

/* ---------- 编年史 ---------- */

.page-about .about-chron {
  padding: clamp(30px, 5vw, 58px) 0 clamp(44px, 7vw, 84px);
  background: var(--ink);
}

.page-about .chron-media {
  position: relative;
  margin: 0 0 clamp(28px, 5vw, 52px);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--grid);
}

.page-about .chron-img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 7;
  object-fit: cover;
  filter: saturate(0.85) brightness(0.8);
}

.page-about .chron-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(105deg, rgba(10, 18, 32, 0.92) 0%, rgba(10, 18, 32, 0.42) 52%, rgba(43, 227, 176, 0.14) 100%);
  pointer-events: none;
}

.page-about .media-caption {
  position: absolute;
  left: 18px;
  bottom: 14px;
  z-index: 1;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--muted);
  text-transform: uppercase;
}

.page-about .chron-grid {
  display: grid;
  gap: clamp(30px, 5vw, 44px);
  min-width: 0;
}

.page-about .about-head,
.page-about .paper-head {
  margin-bottom: clamp(22px, 4vw, 34px);
}

.page-about .about-idx {
  display: inline-block;
  margin-bottom: 12px;
  padding: 4px 10px;
  border: 1px solid var(--grid);
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--muted);
  text-transform: uppercase;
}

.page-about .about-idx--mint {
  border-color: rgba(43, 227, 176, 0.5);
  color: var(--mint);
}

.page-about .about-idx--dark {
  border-color: var(--about-paper-line);
  color: rgba(20, 28, 40, 0.62);
}

.page-about .about-title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(25px, 4vw, 40px);
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--text);
  text-wrap: balance;
}

.page-about .about-note {
  max-width: 60ch;
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .chrono {
  list-style: none;
  margin: 0;
  padding: 0 0 0 22px;
  border-left: 1px solid var(--grid);
}

.page-about .chrono-item {
  position: relative;
  padding: 0 0 26px 6px;
}

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

.page-about .chrono-item::before {
  content: "";
  position: absolute;
  left: -28px;
  top: 6px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--grid);
  box-sizing: content-box;
  transition: background var(--ease), border-color var(--ease), box-shadow var(--ease);
}

.page-about .chrono-item:hover::before,
.page-about .chrono-item:focus-within::before {
  background: var(--mint);
  border-color: var(--mint);
  box-shadow: 0 0 0 5px rgba(43, 227, 176, 0.14);
}

.page-about .chrono-idx {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--muted);
  margin-bottom: 4px;
}

.page-about .chrono-ver {
  margin: 0 0 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--mint);
}

.page-about .chrono-title {
  margin: 0 0 6px;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 17px;
  line-height: 1.45;
  color: var(--text);
  transition: color var(--ease);
}

.page-about .chrono-item:hover .chrono-title {
  color: var(--mint);
}

.page-about .chrono-text {
  margin: 0;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .chron-side {
  display: grid;
  gap: 20px;
  align-content: start;
  min-width: 0;
}

.page-about .member-card {
  padding: 22px 20px;
  border-radius: var(--radius-lg);
  background: linear-gradient(158deg, var(--amber) 0%, #F7C96E 100%);
  color: var(--ink-deep);
}

.page-about .member-card-label {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(20, 28, 40, 0.62);
}

.page-about .member-card-title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 22px;
  line-height: 1.2;
  color: var(--ink-deep);
}

.page-about .member-list {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .member-list li {
  display: flex;
  gap: 9px;
  align-items: flex-start;
  font-size: 14px;
  line-height: 1.65;
  color: rgba(20, 28, 40, 0.86);
}

.page-about .member-dot {
  flex: none;
  width: 6px;
  height: 6px;
  margin-top: 8px;
  border-radius: 50%;
  background: var(--ink-deep);
}

.page-about .member-card .btn-amber {
  background: var(--ink-deep);
  color: var(--amber);
  border-color: var(--ink-deep);
}

.page-about .member-card .btn-amber:hover {
  background: #0F1927;
  color: #FFD07A;
}

.page-about .chron-figure {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--grid);
}

.page-about .chron-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.8) brightness(0.85);
}

/* ---------- 会员权益首页 ---------- */

.page-about .about-member {
  padding: clamp(34px, 5vw, 64px) 0 clamp(40px, 6vw, 76px);
  background: linear-gradient(180deg, var(--ink) 0%, #0C1727 100%);
  border-top: 1px solid var(--grid);
}

.page-about .member-grid {
  display: grid;
  gap: clamp(26px, 5vw, 46px);
  min-width: 0;
}

.page-about .about-lead-text {
  margin: 0 0 22px;
  max-width: 58ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .member-points {
  list-style: none;
  margin: 0 0 24px;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .member-points li {
  padding-left: 16px;
  border-left: 2px solid var(--grid);
  transition: border-color var(--ease);
}

.page-about .member-points li:hover {
  border-left-color: var(--mint);
}

.page-about .member-points h3 {
  margin: 0 0 4px;
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
}

.page-about .member-points p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .member-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px;
}

.page-about .paper-link {
  font-size: 14px;
  color: var(--mint);
  text-decoration: none;
  border-bottom: 1px solid rgba(43, 227, 176, 0.4);
  padding-bottom: 2px;
  transition: border-color var(--ease), color var(--ease);
}

.page-about .paper-link:hover {
  border-bottom-color: var(--mint);
}

.page-about .member-panel {
  display: grid;
  gap: 12px;
  align-content: start;
  min-width: 0;
}

.page-about .mp-card {
  padding: 18px;
  border-radius: var(--radius-md);
  background: var(--panel);
  border: 1px solid var(--grid);
  transition: border-color var(--ease), transform var(--ease);
}

.page-about .mp-card:hover {
  border-color: var(--mint);
  transform: translateY(-2px);
}

.page-about .mp-card--amber {
  border-color: rgba(242, 178, 60, 0.55);
}

.page-about .mp-label {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-about .mp-value {
  margin: 0 0 4px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 20px;
  color: var(--text);
}

.page-about .mp-card--amber .mp-value {
  color: var(--amber);
}

.page-about .mp-meta {
  margin: 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}

.page-about .mp-bar {
  height: 8px;
  margin: 10px 0 8px;
  border-radius: var(--radius-pill);
  background: rgba(30, 46, 71, 1);
  overflow: hidden;
}

.page-about .mp-bar span {
  display: block;
  height: 100%;
  width: 68%;
  border-radius: var(--radius-pill);
  background: linear-gradient(90deg, var(--mint), var(--amber));
}

/* ---------- 暖纸区 ---------- */

.page-about .about-paper {
  background: var(--paper);
  color: var(--ink-deep);
}

.page-about .about-tiers,
.page-about .about-growth,
.page-about .about-team {
  padding: clamp(34px, 5vw, 62px) 0;
}

.page-about .about-growth,
.page-about .about-team {
  border-top: 1px solid var(--about-paper-line);
}

.page-about .paper-title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(25px, 4vw, 40px);
  line-height: 1.12;
  letter-spacing: -0.01em;
  color: var(--ink-deep);
  text-wrap: balance;
}

.page-about .paper-note {
  max-width: 62ch;
  margin: 0;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--about-paper-muted);
}

.page-about .tier-media {
  margin: 0 0 clamp(24px, 4vw, 40px);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--about-paper-line);
}

.page-about .tier-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
  filter: saturate(0.85) brightness(0.92);
}

.page-about .tier-caption {
  margin: 10px 0 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(20, 28, 40, 0.52);
}

.page-about .tier-grid {
  display: grid;
  gap: 16px;
  margin-top: clamp(20px, 4vw, 34px);
  min-width: 0;
}

.page-about .tier-card {
  padding: 22px 20px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--about-paper-line);
  background: #FBF7EF;
  transition: transform var(--ease), box-shadow var(--ease);
}

.page-about .tier-card--a {
  border-color: rgba(242, 178, 60, 0.42);
}

.page-about .tier-card--b {
  background: rgba(242, 178, 60, 0.16);
  border-color: rgba(242, 178, 60, 0.58);
}

.page-about .tier-card--c {
  background: linear-gradient(158deg, var(--amber) 0%, #F8CD74 100%);
  border-color: transparent;
}

.page-about .tier-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 26px rgba(20, 28, 40, 0.10);
}

.page-about .tier-tag {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(20, 28, 40, 0.55);
}

.page-about .tier-name {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(22px, 3vw, 28px);
  line-height: 1.15;
  color: var(--ink-deep);
}

.page-about .tier-for {
  margin: 0 0 16px;
  font-size: 13.5px;
  line-height: 1.6;
  color: rgba(20, 28, 40, 0.66);
}

.page-about .tier-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 9px;
}

.page-about .tier-list li {
  position: relative;
  padding-left: 15px;
  font-size: 14.5px;
  line-height: 1.65;
  color: rgba(20, 28, 40, 0.84);
}

.page-about .tier-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: rgba(20, 28, 40, 0.45);
}

.page-about .tier-card--c .tier-list li::before {
  background: var(--ink-deep);
}

/* ---------- 成长进度 ---------- */

.page-about .growth-grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  min-width: 0;
}

.page-about .growth-track {
  position: relative;
  height: 10px;
  margin: 26px 0 10px;
  border-radius: var(--radius-pill);
  background: rgba(20, 28, 40, 0.12);
  overflow: visible;
}

.page-about .growth-fill {
  display: block;
  height: 100%;
  width: 58%;
  border-radius: var(--radius-pill);
  background: linear-gradient(90deg, #2BE3B0 0%, #F2B23C 100%);
}

.page-about .growth-node {
  position: absolute;
  top: 50%;
  width: 12px;
  height: 12px;
  margin-top: -6px;
  border-radius: 50%;
  background: var(--paper);
  border: 2px solid rgba(20, 28, 40, 0.25);
  box-sizing: border-box;
}

.page-about .growth-node--on {
  left: 0;
  border-color: #2BE3B0;
  background: #2BE3B0;
}

.page-about .growth-node--mid {
  left: 58%;
  border-color: var(--amber);
  background: var(--amber);
}

.page-about .growth-node:last-child {
  left: calc(100% - 12px);
}

.page-about .growth-labels {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: rgba(20, 28, 40, 0.55);
  margin-bottom: 24px;
}

.page-about .growth-accordion {
  border-top: 1px solid var(--about-paper-line);
}

.page-about .accordion-item {
  border-bottom: 1px solid var(--about-paper-line);
}

.page-about .accordion-item h3 {
  margin: 0;
}

.page-about .accordion-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 15px 0;
  background: none;
  border: 0;
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--ink-deep);
  text-align: left;
  cursor: pointer;
}

.page-about .accordion-trigger::after {
  content: "+";
  flex: none;
  font-family: var(--font-mono);
  font-size: 16px;
  color: #B4822A;
}

.page-about .accordion-trigger[aria-expanded="true"]::after {
  content: "–";
  color: var(--ink-deep);
}

.page-about .accordion-trigger:hover {
  color: #8A6216;
}

.page-about .accordion-panel {
  padding: 0 0 16px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--about-paper-muted);
  max-width: 62ch;
}

.page-about .growth-aside {
  align-self: start;
  padding: 22px 20px;
  border-radius: var(--radius-lg);
  background: rgba(20, 28, 40, 0.055);
  border: 1px solid var(--about-paper-line);
}

.page-about .aside-kicker {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(20, 28, 40, 0.55);
}

.page-about .aside-text {
  margin: 0;
  font-size: 17px;
  line-height: 1.7;
  color: var(--ink-deep);
  font-weight: 600;
}

/* ---------- 团队 ---------- */

.page-about .team-grid {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
  align-items: start;
  min-width: 0;
}

.page-about .team-ring-wrap {
  position: relative;
  width: min(260px, 74vw);
  margin: 0 auto;
  aspect-ratio: 1 / 1;
}

.page-about .team-ring {
  display: block;
  width: 100%;
  height: 100%;
}

.page-about .ring-center {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
}

.page-about .ring-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 34px;
  font-weight: 700;
  line-height: 1;
  color: var(--ink-deep);
}

.page-about .ring-unit {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: rgba(20, 28, 40, 0.55);
}

.page-about .team-tabs {
  min-width: 0;
}

.page-about .seg-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
}

.page-about .seg-tab {
  padding: 8px 14px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--about-paper-line);
  background: transparent;
  font-family: var(--font-body);
  font-size: 13.5px;
  color: rgba(20, 28, 40, 0.72);
  cursor: pointer;
  transition: background var(--ease), color var(--ease), border-color var(--ease);
}

.page-about .seg-tab[aria-selected="true"] {
  background: var(--ink-deep);
  border-color: var(--ink-deep);
  color: var(--paper);
}

.page-about .seg-tab:hover {
  border-color: var(--ink-deep);
  color: var(--ink-deep);
}

.page-about .seg-tab[aria-selected="true"]:hover {
  color: var(--paper);
}

.page-about .seg-panel {
  padding: 18px 0 0;
  border-top: 1px solid var(--about-paper-line);
}

.page-about .team-panel-title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 20px;
  color: var(--ink-deep);
}

.page-about .seg-panel p {
  margin: 0;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--about-paper-muted);
}

/* ---------- 合作生态 ---------- */

.page-about .about-eco {
  padding: clamp(34px, 5vw, 64px) 0;
  background: var(--ink);
  border-top: 1px solid var(--grid);
}

.page-about .eco-head {
  margin-bottom: clamp(22px, 4vw, 36px);
}

.page-about .eco-grid {
  list-style: none;
  margin: 0 0 clamp(24px, 4vw, 38px);
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--grid);
  border: 1px solid var(--grid);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.page-about .eco-item {
  background: var(--panel);
  padding: 18px 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.page-about .eco-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 28px;
  font-weight: 700;
  line-height: 1;
  color: var(--amber);
  letter-spacing: 0.02em;
}

.page-about .eco-label {
  font-size: 13px;
  line-height: 1.55;
  color: var(--muted);
}

.page-about .eco-links {
  display: grid;
  gap: 10px;
}

.page-about .eco-link {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 15px 16px;
  border-radius: var(--radius-md);
  border: 1px solid var(--grid);
  background: rgba(16, 28, 47, 0.72);
  text-decoration: none;
  color: var(--text);
  transition: border-color var(--ease), transform var(--ease);
}

.page-about .eco-link:hover {
  border-color: var(--mint);
  transform: translateY(-2px);
}

.page-about .eco-link-idx {
  flex: none;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--muted);
}

.page-about .eco-link-name {
  flex: 1 1 auto;
  min-width: 0;
  font-size: 15px;
  line-height: 1.5;
}

.page-about .eco-link-go {
  flex: none;
  font-family: var(--font-mono);
  color: var(--mint);
}

/* ---------- 收口 ---------- */

.page-about .about-cta {
  position: relative;
  padding: clamp(38px, 6vw, 76px) 0 clamp(46px, 7vw, 88px);
  background:
    radial-gradient(90% 130% at 50% 0%, rgba(43, 227, 176, 0.14), transparent 68%),
    var(--ink);
  border-top: 1px solid var(--grid);
  overflow: hidden;
}

.page-about .cta-inner {
  max-width: 60ch;
}

.page-about .cta-kicker {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--mint);
}

.page-about .cta-title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(28px, 5vw, 52px);
  line-height: 1.08;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-about .cta-note {
  margin: 0 0 24px;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--muted);
}

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

/* ---------- 断点 ---------- */

@media (min-width: 720px) {
  .page-about .hero-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

  .page-about .tier-card--b {
    margin-top: 28px;
  }

  .page-about .tier-card--c {
    grid-column: 1 / -1;
    margin-top: 8px;
  }
}

@media (min-width: 900px) {
  .page-about .hero-grid {
    grid-template-columns: minmax(0, 1.42fr) minmax(0, 0.86fr);
    align-items: end;
  }

  .page-about .chron-grid {
    grid-template-columns: minmax(0, 1.16fr) minmax(0, 0.84fr);
    align-items: start;
  }

  .page-about .chron-side {
    position: sticky;
    top: calc(var(--header-h) + 18px);
  }

  .page-about .member-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
  }

  .page-about .growth-grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.6fr);
    align-items: start;
  }

  .page-about .team-grid {
    grid-template-columns: minmax(0, 0.72fr) minmax(0, 1.28fr);
    align-items: center;
  }

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

  .page-about .tier-card--a {
    grid-column: span 1;
  }

  .page-about .tier-card--b {
    grid-column: span 1;
    margin-top: 44px;
  }

  .page-about .tier-card--c {
    grid-column: span 2;
    margin-top: 14px;
  }
}

@media (min-width: 1080px) {
  .page-about .chrono {
    padding-left: 26px;
  }

  .page-about .chrono-item {
    padding-left: 10px;
  }

  .page-about .chrono-item::before {
    left: -32px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about * {
    transition: none !important;
  }

  .page-about .mp-card:hover,
  .page-about .tier-card:hover,
  .page-about .eco-link:hover {
    transform: none;
  }
}
<<<END>>>