.page-about {
  --about-gold-line: rgba(212, 166, 74, 0.26);
  --about-gold-soft: rgba(212, 166, 74, 0.12);
  --about-paper-line: rgba(17, 24, 32, 0.12);
  background: var(--paper);
  color: var(--ink-black);
  font-family: var(--font-body);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-about .brand-hero {
  position: relative;
  padding: clamp(16px, 3vw, 26px) 0 clamp(44px, 7vw, 88px);
  background:
    radial-gradient(88% 72% at 88% 2%, rgba(55, 224, 208, 0.16), transparent 62%),
    radial-gradient(72% 62% at 2% 0%, rgba(212, 166, 74, 0.16), transparent 60%),
    linear-gradient(168deg, #05192B 0%, var(--ink-deep) 46%, var(--panel-blue) 100%);
  color: var(--paper);
  overflow: hidden;
}

.page-about .brand-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(167, 180, 192, 0.08) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(167, 180, 192, 0.06) 1px, transparent 1px);
  background-size: 88px 88px, 88px 88px;
  pointer-events: none;
}

.page-about .brand-hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 8px;
  background: repeating-linear-gradient(90deg, var(--gold) 0 1px, transparent 1px 24px);
  opacity: 0.55;
}

.page-about .breadcrumb {
  position: relative;
  z-index: 1;
  font-family: var(--font-ui);
  font-size: 12.5px;
  letter-spacing: 0.06em;
}

.page-about .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  color: var(--mist);
}

.page-about .breadcrumb-list li:not(:last-child)::after {
  content: "/";
  margin-left: 8px;
  color: var(--gold);
}

.page-about .breadcrumb-list a {
  color: var(--gold-light);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease);
}

.page-about .breadcrumb-list a:hover,
.page-about .breadcrumb-list a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-about .breadcrumb-list [aria-current="page"] {
  color: var(--paper);
}

.page-about .brand-hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(26px, 4vw, 48px);
  margin-top: clamp(24px, 4vw, 44px);
}

.page-about .brand-hero-eyebrow {
  display: inline-block;
  margin: 0;
  padding-left: 12px;
  border-left: 2px solid var(--gold);
  font-family: var(--font-ui);
  font-size: 12.5px;
  letter-spacing: 0.2em;
  color: var(--gold-light);
}

.page-about .brand-hero h1 {
  margin: 16px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(28px, 5.2vw, 56px);
  line-height: 1.18;
  letter-spacing: -0.01em;
  color: #ffffff;
}

.page-about .brand-hero-lead {
  max-width: 58ch;
  margin: 18px 0 0;
  font-family: var(--font-body);
  font-size: clamp(15px, 1.5vw, 16.5px);
  line-height: 1.9;
  color: rgba(244, 240, 232, 0.84);
}

.page-about .brand-hero-metrics {
  display: grid;
  gap: 14px;
  margin: 26px 0 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--about-gold-line);
  list-style: none;
}

.page-about .brand-hero-metrics li {
  display: grid;
  gap: 4px;
}

.page-about .metric-value {
  font-family: var(--font-num);
  font-size: clamp(21px, 2.6vw, 27px);
  line-height: 1.1;
  color: var(--gold-light);
}

.page-about .metric-label {
  font-family: var(--font-ui);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--mist);
}

.page-about .brand-hero-figure {
  position: relative;
  margin: 0;
  padding: 10px;
  border: 1px solid var(--about-gold-line);
  background: rgba(7, 30, 51, 0.55);
}

.page-about .brand-hero-figure::before {
  content: "";
  position: absolute;
  top: -1px;
  left: -1px;
  width: 34px;
  height: 34px;
  border-top: 2px solid var(--cyan);
  border-left: 2px solid var(--cyan);
  pointer-events: none;
}

.page-about .brand-hero-figure::after {
  content: "";
  position: absolute;
  right: -1px;
  bottom: -1px;
  width: 34px;
  height: 34px;
  border-bottom: 2px solid var(--gold);
  border-right: 2px solid var(--gold);
  pointer-events: none;
}

.page-about .figure-frame img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .figure-caption {
  margin-top: 10px;
  padding-top: 8px;
  border-top: 1px solid var(--about-gold-line);
  font-family: var(--font-ui);
  font-size: 12px;
  line-height: 1.7;
  color: var(--mist);
}

.page-about .btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

/* ---------- 章节基座 ---------- */
.page-about .section {
  position: relative;
  padding: clamp(46px, 7vw, 92px) 0;
}

.page-about .about-position,
.page-about .about-crew,
.page-about .about-cover,
.page-about .about-service {
  background: var(--paper);
}

.page-about .about-epoch {
  background: linear-gradient(180deg, var(--ink-deep) 0%, #0A2440 55%, var(--panel-blue) 100%);
  color: var(--paper);
}

.page-about .about-eco {
  background:
    radial-gradient(80% 70% at 92% 0%, rgba(63, 174, 154, 0.16), transparent 62%),
    linear-gradient(160deg, var(--panel-blue) 0%, var(--ink-deep) 100%);
  color: var(--paper);
}

.page-about .section-head {
  position: relative;
  margin-bottom: clamp(26px, 4vw, 44px);
}

.page-about .section-num {
  margin: 0;
  font-family: var(--font-num);
  font-size: clamp(36px, 8vw, 84px);
  line-height: 0.84;
  letter-spacing: 0.02em;
  color: rgba(212, 166, 74, 0.32);
}

@supports (-webkit-text-stroke: 1px red) {
  .page-about .section-num {
    color: transparent;
    -webkit-text-stroke: 1px var(--gold);
  }
  .page-about .about-epoch .section-num,
  .page-about .about-eco .section-num {
    -webkit-text-stroke: 1px var(--gold-light);
  }
}

.page-about .kicker {
  margin: 12px 0 0;
  font-family: var(--font-ui);
  font-size: 12.5px;
  letter-spacing: 0.2em;
  color: var(--ink-soft);
}

.page-about .section-title {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(22px, 3.4vw, 38px);
  line-height: 1.32;
  letter-spacing: -0.005em;
  color: var(--ink-deep);
}

.page-about .lead {
  max-width: 64ch;
  margin: 14px 0 0;
  font-family: var(--font-body);
  font-size: clamp(15px, 1.4vw, 16.5px);
  line-height: 1.88;
  color: var(--ink-soft);
}

.page-about .about-epoch .section-title,
.page-about .about-eco .section-title {
  color: #FFF6E4;
}

.page-about .about-epoch .kicker,
.page-about .about-eco .kicker {
  color: var(--cyan);
}

.page-about .about-epoch .lead,
.page-about .about-eco .lead {
  color: rgba(244, 240, 232, 0.78);
}

/* ---------- 01 品牌主张 ---------- */
.page-about .about-position-grid {
  display: grid;
  gap: clamp(26px, 4vw, 44px);
}

.page-about .about-thesis {
  padding-left: clamp(16px, 2vw, 26px);
  border-left: 2px solid var(--gold);
}

.page-about .about-thesis p {
  margin: 0 0 16px;
  font-family: var(--font-body);
  font-size: clamp(15px, 1.4vw, 16px);
  line-height: 1.92;
  color: var(--ink-black);
}

.page-about .about-thesis p:last-of-type {
  margin-bottom: 20px;
}

.page-about .link-arrow {
  display: inline-block;
  font-family: var(--font-ui);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--ink-deep);
  text-decoration: none;
  border-bottom: 1px solid var(--gold);
  padding-bottom: 3px;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease);
}

.page-about .link-arrow::after {
  content: " →";
  color: var(--gold);
}

.page-about .link-arrow:hover,
.page-about .link-arrow:focus-visible {
  color: var(--coral);
  border-bottom-color: var(--coral);
}

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

.page-about .pillar {
  display: grid;
  gap: 8px;
  padding: 20px 0;
  border-top: 1px solid var(--about-paper-line);
}

.page-about .pillar:last-child {
  border-bottom: 1px solid var(--about-paper-line);
}

.page-about .pillar-title {
  position: relative;
  margin: 0;
  padding-left: 14px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(17px, 2vw, 20px);
  color: var(--ink-deep);
}

.page-about .pillar-title::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  background: var(--gold);
  transform: rotate(45deg);
}

.page-about .pillar p {
  margin: 0;
  font-family: var(--font-body);
  font-size: 14.8px;
  line-height: 1.88;
  color: var(--ink-soft);
}

/* ---------- 02 时间轴 ---------- */
.page-about .epoch-rail {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(244px, 1fr);
  gap: 0;
  margin: 0;
  padding: 40px 0 6px;
  border-top: 1px solid var(--about-gold-line);
  list-style: none;
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}

.page-about .epoch-node {
  position: relative;
  padding: 0 clamp(16px, 2vw, 26px) 0 0;
  scroll-snap-align: start;
}

.page-about .epoch-node::before {
  content: "";
  position: absolute;
  top: -44px;
  left: 0;
  width: 9px;
  height: 9px;
  background: var(--gold);
  transform: rotate(45deg);
  box-shadow: 0 0 0 4px rgba(212, 166, 74, 0.16);
  transition: background 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.page-about .epoch-step {
  margin: 0;
  font-family: var(--font-num);
  font-size: 11.5px;
  letter-spacing: 0.18em;
  color: var(--gold-light);
}

.page-about .epoch-title {
  margin: 10px 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(16px, 1.8vw, 18.5px);
  line-height: 1.4;
  color: #ffffff;
  transition: color 0.25s var(--ease);
}

.page-about .epoch-text {
  margin: 0;
  font-family: var(--font-body);
  font-size: 14.2px;
  line-height: 1.86;
  color: rgba(244, 240, 232, 0.72);
}

.page-about .epoch-node:hover::before,
.page-about .epoch-node:focus-within::before {
  background: var(--cyan);
  box-shadow: 0 0 0 5px rgba(55, 224, 208, 0.18);
}

.page-about .epoch-node:hover .epoch-title,
.page-about .epoch-node:focus-within .epoch-title {
  color: var(--cyan);
}

/* ---------- 03 团队 ---------- */
.page-about .crew-grid {
  display: grid;
  gap: clamp(24px, 3vw, 40px);
}

.page-about .crew-figure {
  margin: 0;
  padding: 8px;
  border: 1px solid var(--about-paper-line);
  background: var(--paper-lift);
  box-shadow: var(--shadow-panel);
}

.page-about .crew-figure .figure-caption {
  border-top-color: var(--about-paper-line);
  color: var(--ink-soft);
}

.page-about .crew-list {
  display: block;
}

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

.page-about .crew-item:last-of-type {
  border-bottom: 1px solid var(--about-paper-line);
}

.page-about .crew-item summary {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 17px 2px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-ui);
  font-weight: 600;
  font-size: clamp(15px, 1.6vw, 17px);
  color: var(--ink-deep);
  transition: color 0.25s var(--ease);
}

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

.page-about .crew-item summary::after {
  content: "＋";
  margin-left: auto;
  font-family: var(--font-num);
  font-size: 15px;
  color: var(--gold);
  transition: color 0.25s var(--ease);
}

.page-about .crew-item[open] summary::after {
  content: "－";
  color: var(--coral);
}

.page-about .crew-item summary:hover,
.page-about .crew-item summary:focus-visible {
  color: var(--coral);
}

.page-about .crew-idx {
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--gold);
}

.page-about .crew-body {
  padding: 0 2px 18px 30px;
  border-left: 2px solid var(--about-gold-soft);
  margin-left: 4px;
}

.page-about .crew-body p {
  margin: 0 0 10px;
  font-family: var(--font-body);
  font-size: 14.6px;
  line-height: 1.88;
  color: var(--ink-soft);
}

.page-about .crew-body p:last-child {
  margin-bottom: 0;
}

/* ---------- 04 服务覆盖 ---------- */
.page-about .cover-grid {
  display: grid;
  gap: clamp(24px, 3vw, 40px);
}

.page-about .cover-stats {
  display: grid;
  gap: 1px;
  border: 1px solid var(--about-paper-line);
  background: var(--about-paper-line);
}

.page-about .cover-stat {
  display: grid;
  gap: 6px;
  padding: 20px 18px;
  background: var(--paper-lift);
}

.page-about .cover-stat-value {
  font-family: var(--font-num);
  font-size: clamp(24px, 3.2vw, 32px);
  line-height: 1;
  color: var(--ink-deep);
}

.page-about .cover-stat-value .unit {
  margin-left: 4px;
  font-family: var(--font-ui);
  font-size: 0.46em;
  letter-spacing: 0.04em;
  color: var(--gold);
}

.page-about .cover-stat-label {
  font-family: var(--font-ui);
  font-size: 12.5px;
  line-height: 1.6;
  letter-spacing: 0.02em;
  color: var(--ink-soft);
}

.page-about .cover-audience {
  margin-top: 24px;
}

.page-about .audience-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 18px;
  padding: 0;
  list-style: none;
}

.page-about .audience-notes {
  display: grid;
  gap: 14px;
}

.page-about .audience-note {
  padding-left: 12px;
  border-left: 2px solid var(--celadon);
}

.page-about .audience-note strong {
  display: block;
  font-family: var(--font-ui);
  font-size: 14px;
  font-weight: 600;
  color: var(--ink-deep);
}

.page-about .audience-note p {
  margin: 5px 0 0;
  font-family: var(--font-body);
  font-size: 14.2px;
  line-height: 1.82;
  color: var(--ink-soft);
}

.page-about .cover-figure {
  margin: 0;
  padding: 8px;
  border: 1px solid var(--about-gold-line);
  background: var(--paper-lift);
}

.page-about .cover-figure .figure-caption {
  border-top-color: var(--about-paper-line);
  color: var(--ink-soft);
}

/* ---------- 05 协作生态 ---------- */
.page-about .eco-stack {
  display: grid;
  gap: 16px;
}

.page-about .eco-card {
  padding: 24px 20px;
  background: rgba(7, 30, 51, 0.6);
  border: 1px solid var(--about-gold-line);
  border-top: 3px solid var(--gold);
  box-shadow: var(--shadow-frame);
}

.page-about .eco-tag {
  margin: 0;
  font-family: var(--font-num);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-about .eco-card h3 {
  margin: 10px 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 19px;
  color: #ffffff;
}

.page-about .eco-card p:not(.eco-tag) {
  margin: 0;
  font-family: var(--font-body);
  font-size: 14.4px;
  line-height: 1.86;
  color: rgba(244, 240, 232, 0.78);
}

/* ---------- 06 工作方式 ---------- */
.page-about .flow {
  display: grid;
  gap: 1px;
  margin-bottom: clamp(24px, 3vw, 36px);
  border: 1px solid var(--about-paper-line);
  background: var(--about-paper-line);
}

.page-about .flow-step {
  padding: clamp(20px, 2.4vw, 28px);
  background: var(--paper-lift);
}

.page-about .flow-step-num {
  margin: 0;
  font-family: var(--font-num);
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1;
  color: rgba(212, 166, 74, 0.42);
}

@supports (-webkit-text-stroke: 1px red) {
  .page-about .flow-step-num {
    color: transparent;
    -webkit-text-stroke: 1px var(--gold);
  }
}

.page-about .flow-step h3 {
  margin: 14px 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  color: var(--ink-deep);
}

.page-about .flow-step p {
  margin: 0;
  font-family: var(--font-body);
  font-size: 14.4px;
  line-height: 1.88;
  color: var(--ink-soft);
}

.page-about .service-rules {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--about-paper-line);
}

.page-about .service-rule {
  display: grid;
  gap: 6px;
  padding: 16px 0;
  border-bottom: 1px solid var(--about-paper-line);
}

.page-about .service-rule-key {
  font-family: var(--font-ui);
  font-size: 13.5px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--ink-deep);
  border-left: 3px solid var(--gold);
  padding-left: 10px;
}

.page-about .service-rule-text {
  margin: 0;
  padding-left: 13px;
  font-family: var(--font-body);
  font-size: 14.6px;
  line-height: 1.88;
  color: var(--ink-soft);
}

/* ---------- 结尾行动 ---------- */
.page-about .about-cta {
  padding-top: 0;
  padding-bottom: clamp(46px, 7vw, 88px);
}

.page-about .cta-panel {
  position: relative;
  padding: clamp(26px, 4vw, 52px);
  overflow: hidden;
  border: 1px solid var(--about-gold-line);
  background: linear-gradient(135deg, var(--ink-deep) 0%, var(--panel-blue) 72%);
  color: var(--paper);
}

.page-about .cta-panel::after {
  content: "";
  position: absolute;
  top: -70px;
  right: -70px;
  width: 240px;
  height: 240px;
  background: radial-gradient(circle, rgba(55, 224, 208, 0.24), transparent 68%);
  pointer-events: none;
}

.page-about .cta-panel h2 {
  position: relative;
  z-index: 1;
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(21px, 3vw, 30px);
  line-height: 1.35;
  color: #ffffff;
}

.page-about .cta-panel p {
  position: relative;
  z-index: 1;
  max-width: 62ch;
  margin: 14px 0 0;
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.88;
  color: rgba(244, 240, 232, 0.82);
}

.page-about .cta-panel .btn-row {
  position: relative;
  z-index: 1;
}

/* ---------- 断点 ---------- */
@media (min-width: 560px) {
  .page-about .cover-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .page-about .brand-hero-metrics li + li {
    padding-left: 16px;
    border-left: 1px solid var(--about-gold-line);
  }
}

@media (min-width: 640px) {
  .page-about .audience-notes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px 20px;
  }
}

@media (min-width: 720px) {
  .page-about .pillar {
    grid-template-columns: 104px minmax(0, 1fr);
    column-gap: 20px;
    align-items: start;
  }

  .page-about .pillar-title {
    padding-left: 12px;
  }

  .page-about .service-rule {
    grid-template-columns: 150px minmax(0, 1fr);
    gap: 22px;
    align-items: baseline;
  }

  .page-about .service-rule-text {
    padding-left: 0;
  }
}

@media (min-width: 860px) {
  .page-about .flow {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .section-head {
    padding-left: 96px;
  }

  .page-about .section-num {
    position: absolute;
    left: 0;
    top: -4px;
  }

  .page-about .eco-stack {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
    align-items: start;
  }

  .page-about .eco-card:nth-child(2) {
    margin-top: 26px;
  }

  .page-about .eco-card:nth-child(3) {
    margin-top: 52px;
  }
}

@media (min-width: 960px) {
  .page-about .brand-hero-inner {
    grid-template-columns: minmax(0, 1.04fr) minmax(0, 0.96fr);
    align-items: end;
    gap: 48px;
  }
}

@media (min-width: 980px) {
  .page-about .about-position-grid {
    grid-template-columns: minmax(0, 0.88fr) minmax(0, 1.12fr);
    align-items: start;
  }

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

  .page-about .cover-grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
    align-items: start;
  }

  .page-about .cover-figure {
    position: sticky;
    top: 96px;
  }
}

@media (min-width: 1140px) {
  .page-about .epoch-rail {
    grid-auto-columns: minmax(0, 1fr);
    overflow-x: visible;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about [data-reveal] {
    transform: none !important;
    transition: none !important;
  }

  .page-about .epoch-node::before,
  .page-about .epoch-title,
  .page-about .crew-item summary,
  .page-about .link-arrow {
    transition: none !important;
  }

  .page-about .epoch-rail {
    scroll-behavior: auto;
  }
}
<<<END>>>