.page-about {
  --about-axis: 168px;
  --about-measure: 62ch;
  background: var(--bg-base);
  color: var(--ink);
}

.page-about .about-shell {
  padding-block: clamp(24px, 4vw, 52px) clamp(56px, 9vw, 116px);
}

.page-about img {
  max-width: 100%;
  height: auto;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  margin-top: clamp(18px, 3vw, 30px);
  padding: clamp(26px, 5vw, 60px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    radial-gradient(120% 140% at 88% 0%, rgba(47, 125, 91, 0.28) 0%, rgba(11, 30, 45, 0) 58%),
    linear-gradient(158deg, rgba(18, 46, 69, 0.92) 0%, rgba(11, 30, 45, 0.72) 100%);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.5;
  background-image:
    repeating-linear-gradient(90deg, var(--line-soft) 0 1px, transparent 1px 68px),
    repeating-linear-gradient(0deg, var(--line-soft) 0 1px, transparent 1px 68px);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.9) 0%, rgba(0, 0, 0, 0.15) 100%);
}

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

.page-about .about-hero h1 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-size: clamp(2rem, 5.4vw, 4rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  max-width: 18ch;
  color: var(--ink);
}

.page-about .about-hero__lede {
  max-width: 58ch;
  margin: clamp(16px, 2.6vw, 26px) 0 0;
  font-size: clamp(0.96rem, 1.2vw, 1.06rem);
  line-height: 1.85;
  color: var(--ink-dim);
}

.page-about .about-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(24px, 4vw, 40px) 0 0;
  padding: 1px;
  list-style: none;
  border: 1px solid var(--line-soft);
  background: var(--line-soft);
}

.page-about .about-facts > div {
  min-width: 0;
  padding: 14px 16px;
  background: rgba(8, 23, 36, 0.72);
}

.page-about .about-facts dt {
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--ink-mute);
}

.page-about .about-facts dd {
  margin: 8px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(1rem, 1.6vw, 1.2rem);
  font-weight: 700;
  color: var(--gold);
  overflow-wrap: anywhere;
}

@media (min-width: 760px) {
  .page-about .about-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 双栏骨架 ---------- */
.page-about .about-layout {
  margin-top: clamp(38px, 6vw, 84px);
}

.page-about .about-axis {
  display: none;
}

.page-about .about-body {
  min-width: 0;
}

@media (min-width: 960px) {
  .page-about .about-layout {
    display: grid;
    grid-template-columns: var(--about-axis) minmax(0, 1fr);
    gap: clamp(28px, 4vw, 64px);
    align-items: start;
  }

  .page-about .about-axis {
    display: block;
  }

  .page-about .axis-sticky {
    position: sticky;
    top: calc(var(--header-h) + 32px);
  }
}

.page-about .axis-title {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.26em;
  color: var(--ink-mute);
}

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

.page-about .axis-node {
  position: relative;
  display: block;
  padding: 9px 0;
  font-size: 0.82rem;
  line-height: 1.4;
  color: var(--ink-mute);
  text-decoration: none;
  transition: color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .axis-node::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 1.15em;
  width: 10px;
  height: 1px;
  background: var(--line);
  transition: width var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .axis-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.18em;
  color: var(--gold);
  opacity: 0.75;
  margin-bottom: 2px;
}

.page-about .axis-node:hover,
.page-about .axis-node:focus-visible {
  color: var(--accent-soft);
  transform: translateX(4px);
}

.page-about .axis-node:hover::before,
.page-about .axis-node:focus-visible::before {
  width: 17px;
  background: var(--accent-soft);
}

/* ---------- 章节 ---------- */
.page-about .about-chapter {
  padding-block: clamp(34px, 5.6vw, 76px);
  border-top: 1px solid var(--line-soft);
}

.page-about .about-chapter:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .chapter-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: clamp(18px, 3vw, 30px);
}

.page-about .chapter-num {
  flex: none;
  padding: 3px 9px;
  font-size: 0.76rem;
  letter-spacing: 0.16em;
  color: var(--gold);
  border: 1px solid var(--line);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-chapter.is-active .chapter-num {
  color: var(--accent-soft);
  border-color: var(--line-accent);
}

.page-about .chapter-head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.45rem, 3vw, 2.25rem);
  line-height: 1.18;
  letter-spacing: -0.01em;
}

.page-about .chapter-lede {
  max-width: var(--about-measure);
  margin: 0 0 clamp(20px, 3vw, 32px);
  font-size: 1rem;
  line-height: 1.9;
  color: var(--ink-dim);
}

.page-about .chapter-split {
  display: grid;
  gap: clamp(20px, 3vw, 40px);
}

@media (min-width: 820px) {
  .page-about .chapter-split {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    align-items: start;
  }

  .page-about .chapter-split--flip {
    grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
  }
}

.page-about .chapter-copy {
  min-width: 0;
}

.page-about .chapter-copy p {
  max-width: var(--about-measure);
  margin: 0 0 1.15em;
  font-size: 1rem;
  line-height: 1.9;
  color: var(--ink-dim);
}

.page-about .chapter-copy p:last-child {
  margin-bottom: 0;
}

.page-about .chapter-copy h3 {
  margin: 1.7em 0 0.55em;
  font-family: var(--font-display);
  font-size: 1.06rem;
  letter-spacing: 0.01em;
  color: var(--ink);
}

.page-about .chapter-copy h3:first-child {
  margin-top: 0;
}

.page-about .chapter-figure {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--bg-sunken);
}

.page-about .chapter-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.94) contrast(1.02);
}

.page-about .img-frame__caption {
  padding: 10px 13px;
  border-top: 1px solid var(--line-soft);
  font-size: 0.78rem;
  line-height: 1.65;
  color: var(--ink-mute);
}

/* ---------- 赛季刻度 ---------- */
.page-about .season-line {
  list-style: none;
  margin: 0;
  padding: 0 0 0 clamp(18px, 2.6vw, 30px);
  border-left: 1px solid var(--line-accent);
}

.page-about .season-item {
  position: relative;
  padding-bottom: clamp(22px, 3vw, 36px);
}

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

.page-about .season-item::before {
  content: "";
  position: absolute;
  left: calc(-1 * clamp(18px, 2.6vw, 30px) - 4px);
  top: 0.62em;
  width: 7px;
  height: 7px;
  background: var(--bg-base);
  border: 1px solid var(--accent);
  transform: rotate(45deg);
}

.page-about .season-tag {
  margin: 0 0 7px;
  font-size: 0.74rem;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.page-about .season-item h3 {
  margin: 0 0 7px;
  font-family: var(--font-display);
  font-size: clamp(1rem, 1.6vw, 1.18rem);
  line-height: 1.35;
  color: var(--ink);
}

.page-about .season-text {
  max-width: var(--about-measure);
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--ink-dim);
}

/* ---------- 产品原则 ---------- */
.page-about .principle-grid {
  display: grid;
  gap: 1px;
  border: 1px solid var(--line-soft);
  background: var(--line-soft);
}

@media (min-width: 780px) {
  .page-about .principle-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .principle {
  padding: clamp(18px, 2.6vw, 28px);
  background: var(--bg-base);
  transition: background var(--dur) var(--ease);
}

.page-about .principle:hover {
  background: var(--bg-raised);
}

.page-about .principle-tag {
  margin: 0 0 14px;
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  color: var(--accent-soft);
}

.page-about .principle h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 1.1rem;
  line-height: 1.35;
  color: var(--ink);
}

.page-about .principle p:not(.principle-tag) {
  margin: 0;
  font-size: 0.93rem;
  line-height: 1.85;
  color: var(--ink-dim);
}

/* ---------- 主题配色陈列 ---------- */
.page-about .theme-deck {
  display: grid;
  gap: clamp(12px, 2vw, 20px);
  margin-top: clamp(26px, 4vw, 42px);
}

@media (min-width: 680px) {
  .page-about .theme-deck {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .theme-card {
  padding: 16px;
  border: 1px solid var(--line);
  background: var(--bg-raised);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .theme-card:hover,
.page-about .theme-card:focus-within {
  transform: translateY(-4px);
  border-color: var(--line-accent);
}

.page-about .theme-swatch {
  display: block;
  height: 78px;
  margin-bottom: 14px;
  border: 1px solid var(--line-soft);
  background: var(--swatch);
}

.page-about .theme-card--sea {
  --swatch: linear-gradient(135deg, #0B1E2D 0%, #122E45 58%, #2F7D5B 100%);
}

.page-about .theme-card--palm {
  --swatch: linear-gradient(135deg, #122E45 0%, #2F7D5B 52%, #6FC79A 100%);
}

.page-about .theme-card--felt {
  --swatch: linear-gradient(135deg, #1C3B4A 0%, #8E2B3A 58%, #C9A227 100%);
}

.page-about .theme-card h3 {
  margin: 0 0 7px;
  font-family: var(--font-display);
  font-size: 1rem;
  color: var(--ink);
}

.page-about .theme-card p {
  margin: 0;
  font-size: 0.87rem;
  line-height: 1.75;
  color: var(--ink-mute);
}

/* ---------- 合作与覆盖 ---------- */
.page-about .coverage-grid {
  display: grid;
  gap: clamp(16px, 2.4vw, 26px);
  margin-top: clamp(22px, 3vw, 34px);
}

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

.page-about .coverage-item {
  padding: 4px 0 4px 16px;
  border-left: 2px solid var(--accent);
}

.page-about .coverage-num {
  display: block;
  margin-bottom: 6px;
  font-size: clamp(1.15rem, 2vw, 1.4rem);
  font-weight: 700;
  color: var(--gold);
  overflow-wrap: anywhere;
}

.page-about .coverage-item h3 {
  margin: 0 0 7px;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--ink);
}

.page-about .coverage-item p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--ink-dim);
}

/* ---------- 收束 ---------- */
.page-about .about-cta {
  margin-top: clamp(36px, 6vw, 72px);
  padding: clamp(24px, 4vw, 48px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    radial-gradient(110% 130% at 4% 0%, rgba(142, 43, 58, 0.22) 0%, rgba(11, 30, 45, 0) 60%),
    linear-gradient(140deg, rgba(18, 46, 69, 0.9) 0%, rgba(8, 23, 36, 0.72) 100%);
}

.page-about .about-cta h2 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: clamp(1.28rem, 2.6vw, 1.9rem);
  line-height: 1.25;
  max-width: 24ch;
  color: var(--ink);
}

.page-about .about-cta p {
  max-width: 58ch;
  margin: 0 0 24px;
  font-size: 0.97rem;
  line-height: 1.85;
  color: var(--ink-dim);
}

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