.page-about {
  --about-slogan-size: clamp(2.4rem, 5vw, 4.6rem);
  --about-tl-dot: 14px;
  --about-card-shadow: 0 8px 30px rgba(10, 42, 94, 0.08);
  --about-adel: repeating-linear-gradient(45deg, rgba(201,162,39,0.05) 0 2px, transparent 2px 16px),
                repeating-linear-gradient(-45deg, rgba(179,39,42,0.04) 0 3px, transparent 3px 20px),
                linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0));
}

.page-about .about-container {
  max-width: var(--container-width);
  margin-inline: auto;
  padding-inline: var(--container-padding);
}

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

.page-about h2 {
  font-family: var(--font-serif);
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  margin: 8px 0 12px;
  color: inherit;
}

.page-about .about-section-head {
  max-width: 680px;
  margin-bottom: var(--space-lg);
}

.page-about .about-section-head p:last-child {
  color: var(--color-slate);
  line-height: 1.7;
}

.page-about .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 0.875rem;
  color: rgba(255,255,255,0.7);
}

.page-about .breadcrumb-list a {
  color: var(--color-gold-light);
  text-decoration: none;
}

.page-about .breadcrumb-list a:hover {
  text-decoration: underline;
}

.page-about .about-crumb-sep {
  opacity: 0.6;
}

/* === Hero === */
.page-about .about-hero {
  background: var(--color-primary);
  background-image: var(--about-adel);
  color: var(--color-off-white);
  padding-block: 44px 64px;
  position: relative;
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(201,162,39,0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(201,162,39,0.08) 1px, transparent 1px);
  background-size: 48px 48px;
  -webkit-mask-image: linear-gradient(90deg, transparent 20%, #000 100%);
  mask-image: linear-gradient(90deg, transparent 20%, #000 100%);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -90px;
  bottom: -90px;
  width: 240px;
  height: 240px;
  border: 1px solid rgba(201,162,39,0.3);
  border-radius: 20px;
  transform: rotate(45deg);
  pointer-events: none;
}

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

.page-about .about-hero .breadcrumb-list {
  margin-bottom: var(--space-md);
}

.page-about .about-hero-grid {
  display: grid;
  gap: var(--space-lg);
}

.page-about .about-hero-copy {
  max-width: 640px;
}

.page-about .about-hero-copy .eyebrow {
  color: var(--color-gold-light);
}

.page-about .about-hero-copy h1 {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4.2vw, 3.4rem);
  line-height: 1.18;
  margin: 10px 0 16px;
  color: var(--color-off-white);
}

.page-about .about-hero-lead {
  max-width: 36em;
  font-size: clamp(1rem, 1.4vw, 1.25rem);
  line-height: 1.8;
  color: rgba(255,255,255,0.88);
  margin: 0 0 var(--space-md);
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.page-about .about-hero-proof {
  align-self: end;
}

.page-about .about-stat-card {
  margin: 0;
  border: 1px solid rgba(201,162,39,0.4);
  background: rgba(10,42,94,0.55);
  backdrop-filter: blur(6px);
  border-radius: var(--border-radius-md);
  padding: var(--space-sm);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.page-about .about-stat-item {
  padding: var(--space-sm) var(--space-sm) var(--space-sm) 14px;
  background: rgba(255,255,255,0.05);
  border-left: 2px solid var(--color-gold);
}

.page-about .about-stat-item dt {
  font-size: 0.8125rem;
  color: rgba(255,255,255,0.65);
}

.page-about .about-stat-item dd {
  margin: 4px 0 0;
  font-family: var(--font-serif);
  font-size: clamp(1.35rem, 2vw, 1.75rem);
  font-weight: 700;
  color: var(--color-gold-light);
}

.page-about .about-hero-note {
  margin: var(--space-sm) 0 0;
  font-size: 0.8125rem;
  color: rgba(255,255,255,0.55);
  text-align: right;
}

/* === 品牌故事 === */
.page-about .about-story {
  background: var(--color-cream);
  color: var(--color-text);
  padding-block: var(--space-xl);
  position: relative;
  overflow: hidden;
}

.page-about .about-story::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 140px;
  height: 140px;
  background: linear-gradient(135deg, transparent 50%, rgba(184,103,59,0.18) 50%);
  pointer-events: none;
}

.page-about .about-story-grid {
  display: grid;
  gap: var(--space-lg);
  position: relative;
  z-index: 1;
}

.page-about .about-story-side {
  align-self: start;
  position: relative;
  background: var(--color-primary);
  background-image: var(--about-adel);
  color: var(--color-cream);
  padding: var(--space-lg) var(--space-md);
  border-radius: var(--border-radius-md);
  border-left: 4px solid var(--color-gold);
}

.page-about .about-slogan {
  font-family: var(--font-serif);
  font-size: var(--about-slogan-size);
  line-height: 1.25;
  font-weight: 700;
  color: var(--color-gold-light);
  margin: 0;
}

.page-about .about-slogan-note {
  margin: var(--space-sm) 0 0;
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  color: rgba(255,255,255,0.6);
  text-transform: uppercase;
}

.page-about .about-story-body {
  max-width: 820px;
}

.page-about .about-story-body .eyebrow {
  color: var(--color-terracotta);
}

.page-about .about-story-body h2 {
  color: var(--color-primary);
}

.page-about .about-story-lead {
  font-size: 1.125rem;
  line-height: 1.85;
  color: var(--color-text);
  margin-bottom: var(--space-sm);
}

.page-about .about-story-body > p {
  line-height: 1.8;
  color: var(--color-text);
}

.page-about .about-story-points {
  display: grid;
  gap: var(--space-sm);
  margin-block: var(--space-md);
}

.page-about .about-point {
  background: rgba(255,255,255,0.72);
  border-radius: var(--border-radius-sm);
  padding: var(--space-md);
  border-top: 3px solid var(--color-gold);
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.page-about .about-point:hover {
  transform: translateY(-4px);
  border-top-color: var(--color-terracotta);
}

.page-about .about-point-num {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--color-slate);
}

.page-about .about-point h3 {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  margin: 6px 0 8px;
  color: var(--color-primary);
}

.page-about .about-point p {
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--color-slate);
  margin: 0;
}

.page-about .about-story-figure {
  margin: var(--space-lg) 0 0;
}

.page-about .about-story-figure img {
  width: 100%;
  border-radius: var(--border-radius-md);
  box-shadow: var(--about-card-shadow);
}

.page-about .about-story-figure figcaption {
  margin-top: var(--space-sm);
  font-size: 0.875rem;
  color: var(--color-slate);
}

/* === 发展里程碑 === */
.page-about .about-milestones {
  background: var(--color-primary-deep);
  color: var(--color-off-white);
  padding-block: var(--space-xl);
  position: relative;
  overflow: hidden;
}

.page-about .about-milestones::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: var(--about-adel);
  opacity: 0.5;
  pointer-events: none;
}

.page-about .about-milestones .about-container {
  position: relative;
}

.page-about .about-milestones .about-section-head .eyebrow {
  color: var(--color-gold-light);
}

.page-about .about-milestones .about-section-head p:last-child {
  color: rgba(255,255,255,0.65);
}

.page-about .about-timeline-layout {
  display: grid;
  gap: var(--space-lg);
}

.page-about .about-timeline-wrap {
  position: relative;
}

.page-about .about-timeline-svg {
  display: none;
}

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

.page-about .about-tl-item {
  position: relative;
  margin: 0 0 16px 14px;
  padding: 0 0 16px 20px;
  border-left: 2px solid rgba(201,162,39,0.4);
}

.page-about .about-tl-item::before {
  content: "";
  position: absolute;
  left: -17px;
  top: 10px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-gold);
  border: 3px solid var(--color-primary-deep);
  box-shadow: 0 0 0 2px rgba(201,162,39,0.7);
  z-index: 3;
}

.page-about .about-tl-card {
  background: rgba(255,255,255,0.05);
  border-radius: var(--border-radius-sm);
  padding: var(--space-sm) var(--space-md);
}

.page-about .about-tl-year {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--color-gold-light);
  background: rgba(201,162,39,0.12);
  padding: 2px 10px;
  border-radius: 999px;
  margin-bottom: 8px;
}

.page-about .about-tl-card h3 {
  font-family: var(--font-serif);
  font-size: 1.1875rem;
  margin: 0 0 6px;
  color: #fff;
}

.page-about .about-tl-card p {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.65;
  color: rgba(255,255,255,0.72);
  max-height: none;
  opacity: 1;
}

.page-about .about-timeline-figure {
  margin: var(--space-md) 0 0;
}

.page-about .about-timeline-figure img {
  width: 100%;
  max-width: 300px;
  border-radius: var(--border-radius-md);
}

.page-about .about-timeline-figure figcaption {
  margin-top: var(--space-sm);
  font-size: 0.875rem;
  color: rgba(255,255,255,0.55);
}

/* === 资质与荣誉 === */
.page-about .about-credentials {
  background: var(--color-cream);
  color: var(--color-text);
  padding-block: var(--space-xl);
  position: relative;
  overflow: hidden;
}

.page-about .about-cred-bg-icon {
  position: absolute;
  right: 12px;
  bottom: 12px;
  width: 200px;
  height: 200px;
  object-fit: cover;
  opacity: 0.18;
  pointer-events: none;
  z-index: 0;
  border-radius: var(--border-radius-md);
}

.page-about .about-credentials .about-container {
  position: relative;
  z-index: 1;
}

.page-about .about-cred-grid {
  display: grid;
  gap: var(--space-md);
}

.page-about .about-cred-card {
  min-height: 280px;
  cursor: pointer;
  outline: none;
  perspective: 1200px;
}

.page-about .about-cred-inner {
  display: grid;
  transform-style: preserve-3d;
  transition: transform 0.5s var(--transition-slow);
}

.page-about .about-cred-card:hover .about-cred-inner,
.page-about .about-cred-card:focus-within .about-cred-inner,
.page-about .about-cred-card[data-open] .about-cred-inner {
  transform: rotateY(180deg);
}

.page-about .about-cred-face {
  grid-area: 1 / 1;
  min-height: 280px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 8px;
  padding: var(--space-lg) var(--space-md);
  border-radius: var(--border-radius-md);
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
}

.page-about .about-cred-face--front {
  background: var(--color-white);
  border: 1px solid rgba(10,42,94,0.12);
  box-shadow: var(--about-card-shadow);
  color: var(--color-primary);
}

.page-about .about-cred-face--back {
  background: var(--color-primary);
  background-image: var(--about-adel);
  color: var(--color-off-white);
  border: 1px solid rgba(201,162,39,0.4);
  transform: rotateY(180deg);
}

.page-about .about-cred-face--back p {
  font-size: 0.9375rem;
  line-height: 1.7;
  color: rgba(255,255,255,0.85);
  margin: 0 0 4px;
}

.page-about .about-cred-icon {
  color: var(--color-gold);
  background: rgba(201,162,39,0.12);
  border-radius: 50%;
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.page-about .about-cred-face--front h3 {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  margin: 0;
}

.page-about .about-cred-id {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--color-slate);
}

.page-about .about-cred-trigger {
  margin-top: 12px;
}

/* === 团队与生态 === */
.page-about .about-team {
  background: var(--color-off-white);
  color: var(--color-text);
  padding-block: var(--space-xl);
}

.page-about .about-team-grid {
  display: grid;
  gap: var(--space-xl);
}

.page-about .about-team-main .eyebrow {
  color: var(--color-moss);
}

.page-about .about-team-main h2 {
  color: var(--color-primary);
}

.page-about .about-team-lead {
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--color-text);
}

.page-about .about-team-list {
  list-style: none;
  margin: var(--space-md) 0;
  padding: 0;
  display: grid;
  gap: var(--space-sm);
}

.page-about .about-team-list li {
  display: grid;
  gap: 4px;
  padding: var(--space-sm);
  background: var(--color-white);
  border-left: 3px solid var(--color-moss);
  border-radius: var(--border-radius-sm);
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.page-about .about-team-list li:hover {
  transform: translateX(4px);
  border-left-color: var(--color-terracotta);
}

.page-about .about-team-tag {
  font-family: var(--font-serif);
  font-weight: 700;
  color: var(--color-primary);
}

.page-about .about-team-list li span:last-child {
  font-size: 0.875rem;
  color: var(--color-slate);
  line-height: 1.6;
}

.page-about .about-team-aside {
  display: grid;
  gap: var(--space-md);
  align-content: start;
}

.page-about .about-eco-card {
  background: var(--color-primary);
  background-image: var(--about-adel);
  color: var(--color-off-white);
  border-radius: var(--border-radius-md);
  padding: var(--space-lg) var(--space-md);
  border-bottom: 3px solid var(--color-gold);
  box-shadow: var(--about-card-shadow);
}

.page-about .about-eco-card h3 {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  color: var(--color-gold-light);
  margin: 0 0 var(--space-sm);
}

.page-about .about-eco-list {
  list-style: none;
  margin: 0 0 var(--space-sm);
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about .about-eco-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  background: rgba(255,255,255,0.07);
  border-radius: var(--border-radius-sm);
}

.page-about .about-eco-list li span {
  flex: 1;
  font-size: 0.9375rem;
}

.page-about .about-eco-list li strong {
  font-family: var(--font-mono);
  color: var(--color-gold-light);
}

.page-about .about-eco-list li em {
  font-style: normal;
  font-size: 0.8125rem;
  color: rgba(255,255,255,0.55);
}

.page-about .about-eco-note {
  font-size: 0.8125rem;
  color: rgba(255,255,255,0.6);
  margin: 0;
}

.page-about .about-eco-note a {
  color: var(--color-gold-light);
}

.page-about .about-eco-card--light {
  background: var(--color-white);
  color: var(--color-text);
  border-bottom-color: var(--color-terracotta);
}

.page-about .about-eco-card--light h3 {
  color: var(--color-terracotta);
}

.page-about .about-eco-card--light p {
  color: var(--color-slate);
  line-height: 1.7;
  margin: 0;
}

/* === 品牌文化 === */
.page-about .about-culture {
  background: var(--color-primary);
  color: var(--color-cream);
  padding-block: var(--space-xl);
  position: relative;
  overflow: hidden;
}

.page-about .about-culture::before {
  content: "";
  position: absolute;
  right: -40px;
  top: -40px;
  width: 200px;
  height: 200px;
  border: 1px solid rgba(201,162,39,0.3);
  border-radius: 20px;
  transform: rotate(45deg);
  pointer-events: none;
}

.page-about .about-culture .about-container {
  position: relative;
  text-align: center;
}

.page-about .about-culture .eyebrow {
  color: var(--color-gold);
}

.page-about .about-culture-quote {
  font-family: var(--font-serif);
  font-size: clamp(1.25rem, 2.2vw, 1.875rem);
  line-height: 1.7;
  max-width: 780px;
  margin: 0 auto var(--space-lg);
  color: var(--color-gold-light);
}

.page-about .about-culture-links {
  display: grid;
  gap: var(--space-sm);
  max-width: 960px;
  margin: 0 auto;
}

.page-about .about-culture-link {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: var(--space-md) var(--space-sm);
  color: var(--color-cream);
  text-decoration: none;
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--border-radius-sm);
  background: rgba(255,255,255,0.04);
  transition: background var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
}

.page-about .about-culture-link:hover {
  background: rgba(201,162,39,0.12);
  border-color: var(--color-gold);
  transform: translateY(-3px);
}

.page-about .about-culture-link-title {
  font-family: var(--font-serif);
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--color-gold-light);
}

.page-about .about-culture-link-sub {
  font-size: 0.8125rem;
  color: rgba(255,255,255,0.6);
  line-height: 1.5;
}

/* === 平板及以上 === */
@media (min-width: 640px) {
  .page-about .about-story-points {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-about .about-culture-links {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (min-width: 768px) {
  .page-about .about-hero {
    padding-block: 72px 96px;
  }

  .page-about .about-hero-grid {
    grid-template-columns: 1.2fr 0.8fr;
    align-items: center;
    gap: var(--space-xl);
  }

  .page-about .about-cred-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-about .about-timeline-wrap {
    min-height: 600px;
  }

  .page-about .about-timeline-svg {
    display: block;
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
  }

  .page-about .about-timeline-list {
    display: block;
    position: relative;
    z-index: 2;
  }

  .page-about .about-tl-item {
    position: absolute;
    left: var(--tl-x);
    top: var(--tl-y);
    width: min(280px, 32%);
    margin: 0;
    padding: 0;
    border-left: 0;
    transform: translateY(-50%);
  }

  .page-about .about-tl-item::before {
    top: 50%;
    width: var(--about-tl-dot);
    height: var(--about-tl-dot);
    border-width: 3px;
  }

  .page-about .about-tl-item[data-side="left"] {
    text-align: right;
  }

  .page-about .about-tl-item[data-side="right"] {
    text-align: left;
  }

  .page-about .about-tl-item[data-side="left"]::before {
    left: auto;
    right: -7px;
    transform: translate(50%, -50%);
  }

  .page-about .about-tl-item[data-side="right"]::before {
    left: -7px;
    transform: translate(-50%, -50%);
  }

  .page-about .about-tl-card {
    background: rgba(7,30,68,0.88);
    border: 1px solid rgba(201,162,39,0.35);
    border-left: 3px solid var(--color-gold);
    border-radius: var(--border-radius-sm);
    padding: var(--space-md);
    backdrop-filter: blur(4px);
    transition: background var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
  }

  .page-about .about-tl-item[data-side="left"] .about-tl-card {
    border-left: 1px solid rgba(201,162,39,0.35);
    border-right: 3px solid var(--color-gold);
  }

  .page-about .about-tl-card p {
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: opacity var(--transition-slow), max-height var(--transition-slow);
  }

  .page-about .about-tl-item:hover .about-tl-card,
  .page-about .about-tl-item:focus-within .about-tl-card {
    background: rgba(10,42,94,0.92);
    border-color: var(--color-gold-light);
    box-shadow: 0 0 0 1px rgba(201,162,39,0.3), 0 10px 30px rgba(0,0,0,0.25);
  }

  .page-about .about-tl-item:hover .about-tl-card p,
  .page-about .about-tl-item:focus-within .about-tl-card p {
    max-height: 180px;
    opacity: 1;
  }

  .page-about .about-story-side {
    position: sticky;
    top: 120px;
  }
}

@media (min-width: 900px) {
  .page-about .about-story-grid {
    grid-template-columns: 300px 1fr;
    gap: var(--space-xl);
  }

  .page-about .about-team-grid {
    grid-template-columns: 1.1fr 0.9fr;
    gap: var(--space-xl);
  }
}

@media (min-width: 1024px) {
  .page-about .about-timeline-layout {
    grid-template-columns: 1fr 300px;
    gap: var(--space-xl);
  }

  .page-about .about-timeline-figure {
    margin: 0;
    align-self: start;
    position: sticky;
    top: 120px;
  }

  .page-about .about-timeline-figure img {
    width: 300px;
  }
}

.page-about {
  --tl-x: inherit;
  --tl-y: inherit;
}