.page-about {
  --about-gap: clamp(28px, 5vw, 64px);
  position: relative;
  background: var(--harbor-deep);
  color: var(--pure);
  overflow-x: clip;
}

.page-about .shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.page-about .about-head {
  max-width: 64ch;
  margin-bottom: clamp(26px, 4vw, 48px);
}

.page-about .about-head .eyebrow {
  display: block;
  margin-bottom: .9em;
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .17em;
  text-transform: uppercase;
  color: var(--tide);
}

.page-about .about-head .h-section {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.45rem, 3.4vw, 2.35rem);
  line-height: 1.18;
  letter-spacing: -.025em;
}

.page-about .about-lede,
.page-about .about-head-note {
  margin: 1em 0 0;
  font-size: clamp(.98rem, 1.4vw, 1.06rem);
  line-height: 1.78;
  color: var(--text-soft);
}

.page-about .about-head-note {
  max-width: 44ch;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  isolation: isolate;
  display: flex;
  align-items: flex-end;
  min-height: min(90vh, 760px);
  padding: calc(var(--header-h) + clamp(44px, 11vh, 110px)) 0 clamp(38px, 7vh, 76px);
  overflow: hidden;
}

.page-about .about-hero-media {
  position: absolute;
  inset: 0;
  z-index: -2;
}

.page-about .about-hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(.5) contrast(1.1) brightness(.58);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(180deg, rgba(7, 26, 46, .5) 0%, rgba(7, 26, 46, .68) 46%, var(--harbor-deep) 100%),
    linear-gradient(98deg, rgba(11, 42, 74, .9) 0%, rgba(7, 26, 46, .12) 68%);
}

.page-about .about-hero-inner {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.page-about .about-crumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: .5em;
  margin: 0 0 clamp(20px, 4vw, 34px);
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .05em;
}

.page-about .about-crumbs a {
  color: var(--text-soft);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.page-about .about-crumbs a:hover,
.page-about .about-crumbs a:focus-visible {
  color: var(--tide);
  border-bottom-color: var(--tide);
}

.page-about .about-crumbs li + li::before {
  content: "/";
  margin-right: .5em;
  color: var(--line-strong);
}

.page-about .about-crumbs [aria-current] {
  color: var(--sunset);
}

.page-about .about-hero-eyebrow {
  display: block;
  margin: 0 0 1em;
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--tide);
}

.page-about .about-hero-title {
  margin: 0 0 .55em;
  max-width: 17ch;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2rem, 6.2vw, 4.1rem);
  line-height: 1.06;
  letter-spacing: -.035em;
  text-wrap: balance;
}

.page-about .about-hero-lede {
  max-width: 52ch;
  margin: 0;
  font-size: clamp(.98rem, 1.6vw, 1.13rem);
  line-height: 1.8;
  color: var(--text-soft);
}

.page-about .about-hero-scroll {
  display: inline-flex;
  align-items: center;
  gap: .5em;
  margin-top: clamp(24px, 4vw, 38px);
  font-family: var(--font-mono);
  font-size: .8rem;
  letter-spacing: .06em;
  color: var(--sunset);
  text-decoration: none;
  border-bottom: 1px solid rgba(242, 107, 58, .45);
  padding-bottom: .25em;
}

.page-about .about-hero-scroll::after {
  content: "↓";
  transition: transform var(--dur) var(--ease);
}

.page-about .about-hero-scroll:hover::after,
.page-about .about-hero-scroll:focus-visible::after {
  transform: translateY(3px);
}

/* ---------- 章节导航条 ---------- */

.page-about .about-jump {
  position: sticky;
  top: var(--header-h);
  z-index: 30;
  background: rgba(7, 26, 46, .94);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(10px);
}

.page-about .about-jump ul {
  display: flex;
  gap: .3rem;
  max-width: var(--shell);
  margin: 0 auto;
  padding: .55rem var(--gutter);
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-about .about-jump ul::-webkit-scrollbar {
  display: none;
}

.page-about .about-jump a {
  display: inline-block;
  white-space: nowrap;
  padding: .38rem .82rem;
  border: 1px solid transparent;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .04em;
  color: var(--text-soft);
  text-decoration: none;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-jump a:hover,
.page-about .about-jump a:focus-visible {
  color: var(--tide);
  border-color: var(--line-strong);
}

/* ---------- 通用区块 ---------- */

.page-about .section {
  padding: clamp(52px, 8vw, 100px) 0;
}

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

.page-about .about-lines {
  background: linear-gradient(180deg, var(--harbor-deep) 0%, var(--harbor) 100%);
  border-bottom: 1px solid var(--line);
}

.page-about .about-head--split {
  max-width: none;
  display: grid;
  gap: clamp(14px, 2.5vw, 32px);
  grid-template-columns: 1fr;
}

@media (min-width: 860px) {
  .page-about .about-head--split {
    grid-template-columns: 1.35fr .65fr;
    align-items: end;
  }
  .page-about .about-head--split .about-head-note {
    margin-top: 0;
    text-align: left;
  }
}

/* ---------- 时间轴 ---------- */

.page-about .timeline {
  position: relative;
  display: grid;
  gap: clamp(22px, 3.4vw, 38px);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 16px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--tide) 0%, rgba(43, 217, 200, .35) 34%, var(--line) 100%);
}

.page-about .tl-item {
  position: relative;
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
}

@media (min-width: 900px) {
  .page-about .tl-item {
    gap: 26px;
  }
  .page-about .tl-item--shift {
    margin-left: clamp(28px, 6vw, 96px);
  }
}

.page-about .tl-season {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 999px;
  background: var(--tide);
  color: var(--harbor-deep);
  font-size: .76rem;
  font-weight: 700;
  letter-spacing: .02em;
}

.page-about .tl-title {
  margin: .2em 0 .5em;
  font-size: clamp(1.06rem, 2vw, 1.3rem);
  font-weight: 800;
  letter-spacing: -.015em;
  line-height: 1.35;
}

.page-about .tl-body p {
  max-width: 58ch;
  margin: 0;
  font-size: .96rem;
  line-height: 1.78;
  color: var(--text-soft);
}

/* ---------- 四条内容线 ---------- */

.page-about .lines-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

@media (min-width: 880px) {
  .page-about .lines-grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
  }
  .page-about .line-card:nth-child(1) { grid-column: span 7; }
  .page-about .line-card:nth-child(2) { grid-column: span 5; }
  .page-about .line-card:nth-child(3) { grid-column: span 5; }
  .page-about .line-card:nth-child(4) { grid-column: span 7; }
}

.page-about .line-card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: clamp(21px, 3vw, 32px);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(158deg, rgba(18, 59, 99, .82) 0%, rgba(11, 42, 74, .6) 100%);
  box-shadow: var(--shadow-soft);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .line-card:hover {
  border-color: rgba(43, 217, 200, .42);
  transform: translateY(-3px);
}

.page-about .line-idx {
  margin: 0 0 .9em;
  font-size: .78rem;
  letter-spacing: .16em;
  color: var(--sunset);
}

.page-about .line-title {
  margin: 0 0 .55em;
  font-size: clamp(1.08rem, 2vw, 1.3rem);
  font-weight: 800;
  letter-spacing: -.015em;
}

.page-about .line-text {
  margin: 0;
  font-size: .95rem;
  line-height: 1.78;
  color: var(--text-soft);
}

/* ---------- 规模数据条 ---------- */

.page-about .scale-strip {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin: clamp(28px, 4.4vw, 46px) 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-strong);
  border-left: 1px solid var(--line);
}

.page-about .scale-strip li {
  padding: clamp(15px, 2.2vw, 23px) clamp(12px, 1.9vw, 20px);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

@media (min-width: 780px) {
  .page-about .scale-strip {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }
}

.page-about .scale-num {
  display: block;
  font-size: clamp(1.32rem, 2.6vw, 1.85rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -.03em;
  color: var(--tide);
}

.page-about .scale-label {
  display: block;
  margin-top: .5em;
  font-size: .8rem;
  line-height: 1.55;
  color: var(--text-soft);
}

/* ---------- 团队 ---------- */

.page-about .about-team {
  padding: clamp(52px, 8vw, 100px) 0;
  background: var(--sand);
  color: var(--ink);
}

.page-about .about-team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(30px, 4.4vw, 56px);
  align-items: start;
}

@media (min-width: 900px) {
  .page-about .about-team-grid {
    grid-template-columns: 1.12fr .88fr;
  }
}

.page-about .about-team .eyebrow {
  display: block;
  margin-bottom: .9em;
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .17em;
  text-transform: uppercase;
  color: var(--sunset);
}

.page-about .about-team .h-section {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.45rem, 3.4vw, 2.35rem);
  line-height: 1.18;
  letter-spacing: -.025em;
  color: var(--ink);
}

.page-about .about-team-lede {
  max-width: 56ch;
  margin: 1em 0 clamp(22px, 3.4vw, 34px);
  font-size: clamp(.96rem, 1.4vw, 1.02rem);
  line-height: 1.8;
  color: rgba(17, 24, 32, .74);
}

.page-about .team-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid rgba(17, 24, 32, .16);
}

.page-about .team-role {
  position: relative;
  display: grid;
  grid-template-columns: 2.6ch minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  padding: 18px 0 18px 16px;
  border-bottom: 1px solid rgba(17, 24, 32, .14);
  transition: background-color var(--dur) var(--ease);
}

.page-about .team-role::before {
  content: "";
  position: absolute;
  left: 0;
  top: 18px;
  bottom: 18px;
  width: 2px;
  background: var(--sunset);
  transform: scaleY(.25);
  transform-origin: top;
  transition: transform var(--dur) var(--ease);
}

.page-about .team-role:hover::before,
.page-about .team-role:focus-within::before {
  transform: scaleY(1);
}

.page-about .team-role:hover {
  background-color: rgba(242, 107, 58, .07);
}

.page-about .team-num {
  font-size: clamp(1.35rem, 2.4vw, 1.72rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.04em;
  color: var(--sunset);
}

.page-about .team-name {
  margin: 0 0 .3em;
  font-size: 1.02rem;
  font-weight: 800;
  color: var(--ink);
}

.page-about .team-desc {
  max-width: 46ch;
  margin: 0;
  font-size: .91rem;
  line-height: 1.72;
  color: rgba(17, 24, 32, .72);
}

.page-about .about-team-figure {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(17, 24, 32, .14);
  background: var(--harbor);
  box-shadow: var(--shadow-soft);
}

.page-about .about-team-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 10 / 7;
  object-fit: cover;
  filter: saturate(.58) contrast(1.08);
}

.page-about .about-team-figure figcaption {
  padding: 12px 16px;
  font-family: var(--font-mono);
  font-size: .73rem;
  letter-spacing: .05em;
  color: var(--mist);
  background: var(--harbor-deep);
}

/* ---------- 合作生态 ---------- */

.page-about .about-partners {
  position: relative;
  isolation: isolate;
  padding: clamp(56px, 9vw, 108px) 0;
  overflow: hidden;
}

.page-about .about-partners-media {
  position: absolute;
  inset: 0;
  z-index: -2;
}

.page-about .about-partners-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(.42) contrast(1.12) brightness(.46);
}

.page-about .about-partners::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(122deg, var(--harbor-deep) 6%, rgba(7, 26, 46, .88) 54%, rgba(11, 42, 74, .7) 100%);
}

.page-about .partner-map {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 4vw, 46px);
  align-items: center;
  margin-top: clamp(22px, 3.6vw, 36px);
}

@media (min-width: 840px) {
  .page-about .partner-map {
    grid-template-columns: .85fr 1.15fr;
  }
}

.page-about .partner-graph-wrap {
  display: flex;
  justify-content: center;
}

.page-about .partner-graph {
  width: 100%;
  max-width: 400px;
  height: auto;
}

.page-about .partner-graph .pg-lines line {
  stroke: var(--tide);
  stroke-width: 1.2;
  stroke-dasharray: 4 5;
  opacity: .5;
}

.page-about .partner-graph .pg-nodes circle {
  fill: var(--tide);
}

.page-about .partner-graph .pg-nodes circle:first-child {
  fill: var(--sunset);
}

.page-about .partner-nodes {
  display: grid;
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .partner-nodes li {
  padding: 2px 0 2px 16px;
  border-left: 2px solid rgba(43, 217, 200, .55);
}

.page-about .partner-nodes h3 {
  margin: 0 0 .32em;
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: -.01em;
}

.page-about .partner-nodes p {
  margin: 0;
  font-size: .92rem;
  line-height: 1.72;
  color: var(--text-soft);
}

.page-about .partner-accolade {
  display: inline-block;
  margin: clamp(26px, 4vw, 40px) 0 0;
  padding: 12px 18px;
  border: 1px solid rgba(43, 217, 200, .42);
  border-radius: var(--radius);
  background: rgba(43, 217, 200, .08);
  font-size: .92rem;
  letter-spacing: .01em;
  color: var(--pure);
}

.page-about .partner-link-line {
  margin: 20px 0 0;
}

.page-about .partner-link-line a {
  font-family: var(--font-mono);
  font-size: .84rem;
  letter-spacing: .04em;
  color: var(--sunset);
  text-decoration: none;
  border-bottom: 1px solid rgba(242, 107, 58, .45);
  padding-bottom: .2em;
}

.page-about .partner-link-line a:hover,
.page-about .partner-link-line a:focus-visible {
  color: var(--tide);
  border-bottom-color: var(--tide);
}

/* ---------- 更新节奏 ---------- */

.page-about .about-cadence {
  padding: clamp(52px, 8vw, 100px) 0 clamp(56px, 9vw, 112px);
  background: var(--harbor);
  border-top: 1px solid var(--line);
}

.page-about .cadence-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(24px, 4vw, 40px);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--line);
  overflow: hidden;
}

@media (min-width: 820px) {
  .page-about .cadence-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .cadence-item {
  padding: clamp(18px, 2.8vw, 28px);
  background: var(--harbor-card);
}

.page-about .cadence-item--lead {
  background: linear-gradient(154deg, rgba(242, 107, 58, .26) 0%, rgba(18, 59, 99, .92) 100%);
}

.page-about .cadence-num {
  font-size: clamp(1.85rem, 4.4vw, 2.85rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.05em;
  color: var(--tide);
}

.page-about .cadence-unit {
  margin-left: .3em;
  font-size: .82rem;
  color: var(--text-soft);
}

.page-about .cadence-item p {
  margin: .75em 0 0;
  font-size: .88rem;
  line-height: 1.66;
  color: var(--text-soft);
}

.page-about .cadence-item--lead p {
  color: rgba(255, 255, 255, .82);
}

.page-about .cadence-note {
  max-width: 62ch;
  margin: clamp(22px, 3.4vw, 34px) 0 0;
  padding-left: 16px;
  border-left: 2px solid var(--violet);
  font-size: .94rem;
  line-height: 1.8;
  color: var(--text-soft);
}

.page-about .about-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(26px, 4vw, 42px);
}

@media (max-width: 420px) {
  .page-about .about-hero-title {
    max-width: none;
  }
  .page-about .team-role {
    grid-template-columns: 2.2ch minmax(0, 1fr);
    gap: 12px;
    padding-left: 12px;
  }
  .page-about .about-cta .btn {
    flex: 1 1 100%;
    text-align: center;
  }
}
<<<END>>>