.page-about {
  --about-gold: var(--gold);
  --about-red: var(--red);
  --about-navy: var(--navy);
  --about-ink: var(--ink);
  --about-paper: var(--paper);
  --about-ivory: var(--ivory);
  --about-sand: var(--sand);
  background: var(--paper);
}

/* ========== 面包屑 ========== */
.page-about .about-breadcrumb {
  padding: 20px clamp(16px, 4vw, 64px) 8px;
}
.page-about .about-breadcrumb-inner {
  max-width: var(--container);
  margin: 0 auto;
  display: flex;
  gap: 8px;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--navy);
}
.page-about .about-breadcrumb a {
  color: var(--navy);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color .2s ease;
}
.page-about .about-breadcrumb a:hover {
  border-bottom-color: var(--gold);
}
.page-about .about-crumb-sep {
  color: var(--gold);
}
.page-about .about-crumb-current {
  color: var(--ink);
  font-weight: 700;
}

/* ========== 首屏 ========== */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  margin: 0 clamp(16px, 4vw, 64px) clamp(36px, 5vw, 72px);
  background: var(--ink);
  color: var(--paper);
}
.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(246, 241, 229, .04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(246, 241, 229, .04) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none;
}
.page-about .about-hero-grid {
  max-width: calc(var(--container) - clamp(32px, 8vw, 128px));
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
}
.page-about .about-hero-copy {
  padding: clamp(32px, 5vw, 72px) clamp(24px, 4vw, 56px) 32px;
  position: relative;
  z-index: 1;
}
.page-about .about-hero-kicker {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .15em;
  color: var(--gold);
  margin: 0 0 18px;
  display: flex;
  align-items: center;
  gap: 10px;
  text-transform: uppercase;
}
.page-about .about-kicker-dot {
  width: 8px;
  height: 8px;
  background: var(--red);
  flex-shrink: 0;
}
.page-about .about-hero h1 {
  font-family: var(--font-head);
  font-size: clamp(30px, 5vw, 58px);
  font-weight: 700;
  line-height: 1.16;
  letter-spacing: -.01em;
  margin: 0 0 20px;
  color: var(--paper);
}
.page-about .about-hero-lead {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.8;
  color: rgba(246, 241, 229, .82);
  max-width: 46em;
  margin: 0;
}
.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}
.page-about .about-hero-btn {
  font-family: var(--font-head);
  font-size: 14px;
  font-weight: 700;
  padding: 12px 22px;
  text-decoration: none;
  transition: background .2s ease, color .2s ease, border-color .2s ease;
}
.page-about .about-hero-btn-primary {
  background: var(--gold);
  color: var(--ink);
  border: 1px solid var(--gold);
}
.page-about .about-hero-btn-primary:hover {
  background: #D6B95C;
}
.page-about .about-hero-btn-ghost {
  border: 1px solid rgba(246, 241, 229, .5);
  color: var(--paper);
}
.page-about .about-hero-btn-ghost:hover {
  border-color: var(--paper);
  background: rgba(246, 241, 229, .08);
}
.page-about .about-hero-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: rgba(246, 241, 229, .15);
  border: 1px solid rgba(246, 241, 229, .15);
  margin: 36px 0 0;
}
.page-about .about-hero-stat {
  background: var(--ink);
  padding: 16px 20px;
}
.page-about .about-hero-stat dt {
  font-family: var(--font-mono);
  font-size: 12px;
  color: rgba(246, 241, 229, .58);
  margin-bottom: 4px;
}
.page-about .about-hero-stat dd {
  font-family: var(--font-head);
  font-size: 28px;
  font-weight: 700;
  color: var(--gold);
  margin: 0;
}
.page-about .about-hero-visual {
  background: var(--navy);
  padding: clamp(16px, 2.4vw, 28px);
  border-top: 1px solid rgba(246, 241, 229, .1);
  position: relative;
  z-index: 1;
}
.page-about .about-hero-figure {
  margin: 0;
}
.page-about .about-hero-img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .about-hero-figure figcaption {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: rgba(246, 241, 229, .6);
  padding-top: 10px;
}
.page-about .about-hero-stamp {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--gold);
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 14px;
}
.page-about .about-hero-stamp svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

/* ========== 通用 section head ========== */
.page-about .about-section-head {
  margin-bottom: 36px;
}
.page-about .about-section-index {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 400;
  letter-spacing: .12em;
  color: var(--red);
  margin: 0 0 10px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.page-about .about-section-index::before {
  content: "";
  display: inline-block;
  width: 26px;
  height: 2px;
  background: var(--gold);
}
.page-about .about-section-head h2 {
  font-family: var(--font-head);
  font-size: clamp(22px, 3vw, 34px);
  font-weight: 700;
  line-height: 1.25;
  margin: 0;
}

/* ========== 我们是谁 ========== */
.page-about .about-who {
  padding: clamp(48px, 7vw, 96px) clamp(16px, 4vw, 64px) clamp(40px, 6vw, 80px);
}
.page-about .about-who-inner {
  max-width: var(--container);
  margin: 0 auto;
}
.page-about .about-who-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}
.page-about .about-who-main {
  border-left: 3px solid var(--gold);
  padding-left: clamp(20px, 3vw, 32px);
}
.page-about .about-who-lead {
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 600;
  line-height: 1.75;
  color: var(--navy);
  margin: 0 0 16px;
}
.page-about .about-who-main p {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink);
  margin: 0 0 14px;
}
.page-about .about-who-main p:last-child {
  margin-bottom: 0;
}
.page-about .about-who-aside {
  background: var(--navy);
  color: var(--paper);
  padding: 28px;
  position: relative;
}
.page-about .about-who-aside::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 48px;
  height: 4px;
  background: var(--gold);
}
.page-about .about-who-aside h3 {
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 700;
  margin: 0 0 20px;
  color: var(--gold);
}
.page-about .about-who-list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-about .about-who-list li {
  display: flex;
  gap: 14px;
  border-top: 1px solid rgba(246, 241, 229, .18);
  padding: 16px 0;
}
.page-about .about-who-list li:first-child {
  border-top: none;
  padding-top: 0;
}
.page-about .about-who-num {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--gold);
  line-height: 1.6;
  flex-shrink: 0;
}
.page-about .about-who-list p {
  margin: 0;
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.65;
  color: rgba(246, 241, 229, .85);
}
.page-about .about-who-list strong {
  color: var(--paper);
  font-weight: 700;
}
.page-about .about-who-route {
  background: var(--sand);
  border-left: 4px solid var(--gold);
  padding: 18px 20px;
  margin-top: 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  justify-content: space-between;
}
.page-about .about-route-label {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--navy);
  margin: 0;
  letter-spacing: .06em;
}
.page-about .about-route-steps {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 14px;
  color: var(--ink);
}
.page-about .about-route-arrow {
  color: var(--gold);
  font-family: var(--font-mono);
  font-size: 16px;
}

/* ========== 发展历程 ========== */
.page-about .about-history {
  background: var(--ivory);
  border-top: 1px solid var(--sand);
  border-bottom: 1px solid var(--sand);
  padding: clamp(48px, 7vw, 96px) clamp(16px, 4vw, 64px);
}
.page-about .about-history-inner {
  max-width: var(--container);
  margin: 0 auto;
}
.page-about .about-history-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}
.page-about .about-timeline-wrap {
  overflow: hidden;
}
.page-about .about-timeline-list {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}
.page-about .about-timeline-list::before {
  content: "";
  position: absolute;
  left: 88px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: var(--navy);
}
.page-about .about-timeline-item {
  position: relative;
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 18px;
  padding-bottom: 30px;
}
.page-about .about-timeline-item:last-child {
  padding-bottom: 0;
}
.page-about .about-timeline-item::before {
  content: "";
  position: absolute;
  left: 83px;
  top: 22px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--paper);
  border: 3px solid var(--gold);
  z-index: 1;
}
.page-about .about-tl-year {
  font-family: var(--font-head);
  font-size: 22px;
  font-weight: 700;
  color: var(--gold);
  line-height: 1.4;
  text-align: right;
}
.page-about .about-tl-body {
  position: relative;
}
.page-about .about-tl-body h3 {
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 700;
  margin: 0 0 8px;
  color: var(--ink);
}
.page-about .about-tl-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  color: var(--navy);
  background: var(--gold);
  padding: 2px 6px;
  margin-left: 6px;
  vertical-align: 2px;
  letter-spacing: .04em;
}
.page-about .about-tl-body p {
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink);
  margin: 0;
}
.page-about .about-history-aside {
  display: flex;
  flex-direction: column;
  gap: 24px;
}
.page-about .about-history-figure {
  position: relative;
  margin: 0;
  background: var(--navy);
  padding: 12px;
}
.page-about .about-history-figure::after {
  content: "";
  position: absolute;
  right: -10px;
  bottom: -10px;
  width: 100%;
  height: 100%;
  border: 2px solid var(--gold);
  z-index: -1;
}
.page-about .about-history-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .about-history-figure figcaption {
  font-family: var(--font-mono);
  font-size: 12px;
  color: rgba(246, 241, 229, .65);
  padding: 10px 4px 4px;
  letter-spacing: .03em;
}
.page-about .about-history-note {
  border: 1px solid var(--sand);
  border-left: 4px solid var(--gold);
  padding: 16px 20px;
  background: var(--paper);
}
.page-about .about-history-note p {
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.7;
  margin: 6px 0;
  color: var(--ink);
}
.page-about .about-note-mark {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--red);
  display: inline-block;
  width: 3.2em;
}

/* ========== 内容体系 ========== */
.page-about .about-system {
  background: var(--navy);
  color: var(--paper);
  padding: clamp(48px, 7vw, 96px) clamp(16px, 4vw, 64px);
}
.page-about .about-system-inner {
  max-width: var(--container);
  margin: 0 auto;
}
.page-about .about-system .about-section-index {
  color: var(--gold);
}
.page-about .about-system .about-section-head h2 {
  color: var(--paper);
}
.page-about .about-system-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}
.page-about .about-system-card {
  background: var(--paper);
  color: var(--ink);
  padding: 26px 24px 22px;
  position: relative;
  border-left: 4px solid var(--gold);
  transition: transform .2s ease, box-shadow .2s ease;
}
.page-about .about-system-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(8, 23, 38, .14);
}
.page-about .about-card-index {
  display: block;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--red);
  margin-bottom: 14px;
}
.page-about .about-system-card h3 {
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 700;
  margin: 0 0 10px;
  color: var(--ink);
}
.page-about .about-system-card p {
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.7;
  margin: 0 0 16px;
  color: var(--ink);
}
.page-about .about-card-link {
  display: inline-block;
  font-family: var(--font-head);
  font-size: 14px;
  font-weight: 700;
  color: var(--navy);
  text-decoration: none;
  border-bottom: 2px solid var(--gold);
  transition: color .2s ease, border-color .2s ease;
}
.page-about .about-card-link:hover {
  color: var(--red);
  border-bottom-color: var(--red);
}
.page-about .about-card-link span {
  font-family: var(--font-mono);
  font-size: 16px;
}

.page-about .about-system-update {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  margin-top: 32px;
  background: var(--navy-deep);
  padding: clamp(20px, 3vw, 32px);
  border: 1px solid rgba(246, 241, 229, .15);
}
.page-about .about-system-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .about-system-update-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.page-about .about-update-kicker {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--gold);
  margin: 0 0 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.page-about .about-update-dot {
  width: 8px;
  height: 8px;
  background: var(--red);
  flex-shrink: 0;
}
.page-about .about-system-update-copy h3 {
  font-family: var(--font-head);
  font-size: 22px;
  font-weight: 700;
  color: var(--paper);
  margin: 0 0 14px;
}
.page-about .about-system-update-copy p {
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.75;
  color: rgba(246, 241, 229, .82);
  margin: 0 0 12px;
}
.page-about .about-system-update-copy p:last-child {
  margin-bottom: 0;
}

/* ========== 资质与荣誉 ========== */
.page-about .about-credential {
  padding: clamp(48px, 7vw, 96px) clamp(16px, 4vw, 64px);
}
.page-about .about-credential-inner {
  max-width: var(--container);
  margin: 0 auto;
}
.page-about .about-credential-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}
.page-about .about-cred-card {
  background: var(--navy);
  color: var(--paper);
  padding: 30px 28px 26px;
  border-top: 5px solid var(--gold);
  position: relative;
}
.page-about .about-cred-icon {
  width: 56px;
  height: 56px;
  border: 1px solid rgba(246, 241, 229, .3);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--gold);
}
.page-about .about-cred-icon svg {
  width: 28px;
  height: 28px;
}
.page-about .about-cred-card h3 {
  font-family: var(--font-head);
  font-size: 19px;
  font-weight: 700;
  color: var(--paper);
  margin: 0 0 12px;
}
.page-about .about-cred-card p {
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.7;
  color: rgba(246, 241, 229, .8);
  margin: 0 0 18px;
}
.page-about .about-cred-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--gold);
  border: 1px solid rgba(246, 241, 229, .25);
  padding: 5px 10px;
}
.page-about .about-cred-card-gold {
  background: var(--gold);
  color: var(--ink);
  border-top-color: var(--ink);
}
.page-about .about-cred-card-gold .about-cred-icon {
  border-color: rgba(26, 29, 33, .35);
  color: var(--ink);
}
.page-about .about-cred-card-gold h3 {
  color: var(--ink);
}
.page-about .about-cred-card-gold p {
  color: rgba(26, 29, 33, .78);
}
.page-about .about-cred-card-gold .about-cred-tag {
  color: var(--ink);
  border-color: rgba(26, 29, 33, .35);
}

/* ========== 合作生态 ========== */
.page-about .about-partner {
  background: var(--ink);
  color: var(--paper);
  padding: clamp(48px, 7vw, 96px) clamp(16px, 4vw, 64px);
}
.page-about .about-partner-inner {
  max-width: var(--container);
  margin: 0 auto;
}
.page-about .about-partner .about-section-index {
  color: var(--gold);
}
.page-about .about-partner .about-section-head h2 {
  color: var(--paper);
}
.page-about .about-partner-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: rgba(246, 241, 229, .16);
  border: 1px solid rgba(246, 241, 229, .16);
}
.page-about .about-partner-card {
  background: var(--ink);
  padding: 26px 24px;
}
.page-about .about-partner-glyph {
  width: 44px;
  height: 44px;
  color: var(--gold);
  border: 1px solid rgba(246, 241, 229, .22);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
}
.page-about .about-partner-glyph svg {
  width: 24px;
  height: 24px;
}
.page-about .about-partner-card h3 {
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 700;
  color: var(--paper);
  margin: 0 0 10px;
}
.page-about .about-partner-card p {
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.7;
  color: rgba(246, 241, 229, .75);
  margin: 0;
}
.page-about .about-partner-team {
  margin-top: 24px;
  background: var(--navy-deep);
  padding: 22px 24px;
  border-left: 4px solid var(--gold);
  display: grid;
  gap: 8px;
}
.page-about .about-partner-team-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--gold);
  margin-bottom: 2px;
}
.page-about .about-partner-team p {
  margin: 0;
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.7;
  color: rgba(246, 241, 229, .8);
}
.page-about .about-partner-team strong {
  color: var(--paper);
  font-weight: 700;
}

/* ========== CTA ========== */
.page-about .about-cta {
  padding: clamp(48px, 7vw, 80px) clamp(16px, 4vw, 64px);
}
.page-about .about-cta-inner {
  max-width: var(--container);
  margin: 0 auto;
  background: var(--gold);
  color: var(--ink);
  padding: clamp(28px, 4vw, 48px);
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  align-items: center;
}
.page-about .about-cta-kicker {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--red);
  margin: 0 0 4px;
}
.page-about .about-cta h2 {
  font-family: var(--font-head);
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 700;
  margin: 0 0 8px;
}
.page-about .about-cta-copy p:last-child {
  margin: 0;
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.7;
}
.page-about .about-cta-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.page-about .about-cta-btn {
  font-family: var(--font-head);
  font-size: 14px;
  font-weight: 700;
  padding: 12px 22px;
  background: var(--ink);
  color: var(--paper);
  text-decoration: none;
  transition: background .2s ease, color .2s ease;
}
.page-about .about-cta-btn:hover {
  background: var(--navy-deep);
}
.page-about .about-cta-btn-ghost {
  font-family: var(--font-head);
  font-size: 14px;
  font-weight: 700;
  padding: 12px 22px;
  border: 1px solid var(--ink);
  color: var(--ink);
  text-decoration: none;
  transition: background .2s ease, color .2s ease;
}
.page-about .about-cta-btn-ghost:hover {
  background: var(--ink);
  color: var(--paper);
}

/* ========== 响应式：平板 ========== */
@media (min-width: 720px) {
  .page-about .about-hero-stats {
    grid-template-columns: repeat(4, 1fr);
  }
  .page-about .about-who-grid {
    grid-template-columns: 1.2fr 0.8fr;
    gap: 32px;
  }
  .page-about .about-system-grid {
    grid-template-columns: 1fr 1fr;
    gap: 18px;
  }
  .page-about .about-system-update {
    grid-template-columns: 1fr 1fr;
    align-items: center;
  }
  .page-about .about-credential-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
  }
  .page-about .about-partner-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .page-about .about-cta-inner {
    grid-template-columns: 1fr auto;
  }
}

/* ========== 响应式：桌面 ========== */
@media (min-width: 1024px) {
  .page-about .about-hero-grid {
    grid-template-columns: 1.05fr 0.95fr;
    align-items: stretch;
  }
  .page-about .about-hero-visual {
    border-top: none;
    border-left: 1px solid rgba(246, 241, 229, .1);
    display: flex;
    flex-direction: column;
    justify-content: center;
    margin-top: 28px;
    margin-right: 28px;
  }
  .page-about .about-hero-copy {
    padding: clamp(40px, 5vw, 72px) clamp(32px, 4vw, 56px);
  }
  .page-about .about-history-layout {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 56px;
    align-items: start;
  }
  .page-about .about-who-route {
    flex-wrap: nowrap;
  }
}