.page-about {
  background: var(--rice-white);
  color: var(--text-primary);
  font-family: var(--font-body);
  overflow-x: hidden;
}

/* 面包屑 */
.page-about .about-breadcrumb {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 20px 20px 0;
  font-size: 13px;
  letter-spacing: 0.08em;
}
.page-about .about-breadcrumb a {
  color: var(--water-green);
  text-decoration: none;
  transition: color var(--transition-fast);
}
.page-about .about-breadcrumb a:hover {
  color: var(--ink-black);
}
.page-about .about-breadcrumb .breadcrumb-sep {
  margin: 0 8px;
  color: var(--gold);
  font-family: var(--font-data);
}
.page-about .about-breadcrumb .about-crumb.is-current {
  color: var(--blue-gray);
}

/* 首屏 */
.page-about .about-hero {
  position: relative;
  padding: 48px 20px 24px;
}
.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 44%;
  height: 260px;
  background: linear-gradient(135deg, rgba(0, 180, 160, 0.12), rgba(212, 175, 55, 0.10));
  clip-path: polygon(100% 0, 100% 100%, 0 100%);
  z-index: 0;
  pointer-events: none;
}
.page-about .about-hero-inner {
  position: relative;
  z-index: 1;
  max-width: var(--content-max);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 36px;
}
.page-about .about-kicker {
  display: inline-block;
  padding: 8px 14px;
  font-size: 13px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}
.page-about .about-hero h1 {
  font-family: var(--font-title);
  font-size: clamp(38px, 7vw, 58px);
  line-height: 1.12;
  letter-spacing: -0.01em;
  margin: 24px 0 20px;
  max-width: 680px;
}
.page-about .about-hero-lead {
  font-size: 17px;
  line-height: 1.9;
  color: var(--blue-gray);
  max-width: 600px;
}
.page-about .about-chapter-nav {
  list-style: none;
  margin: 32px 0 0;
  padding: 22px 0 0;
  border-top: 1px solid rgba(212, 175, 55, 0.5);
  display: grid;
  grid-template-columns: 1fr;
  gap: 2px 28px;
  max-width: 640px;
}
.page-about .about-chapter-nav a {
  display: inline-flex;
  align-items: baseline;
  gap: 12px;
  padding: 8px 0;
  color: var(--text-primary);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
}
.page-about .about-chapter-nav a:hover,
.page-about .about-chapter-nav a:focus-visible {
  color: var(--water-green);
  border-bottom-color: var(--water-green);
  transform: translateX(4px);
}
.page-about .about-chapter-nav .data-number {
  font-family: var(--font-data);
  font-size: 13px;
  color: var(--gold);
}

/* 首屏图 */
.page-about .about-hero-figure {
  flex: 1 1 46%;
  margin: 0;
  position: relative;
}
.page-about .about-hero-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius);
  box-shadow: 14px 14px 0 rgba(0, 180, 160, 0.14);
  transform: rotate(-1.5deg);
  clip-path: polygon(0 3%, 100% 0, 99% 97%, 1% 100%);
}
.page-about .about-hero-figure::after {
  content: "";
  position: absolute;
  inset: 16px;
  border: 1px solid rgba(212, 175, 55, 0.55);
  pointer-events: none;
}
.page-about .about-hero-figure figcaption {
  margin-top: 16px;
  font-size: 13px;
  color: var(--blue-gray);
  letter-spacing: 0.06em;
  display: flex;
  align-items: center;
  gap: 10px;
}
.page-about .about-hero-figure figcaption::before {
  content: "";
  width: 28px;
  height: 1px;
  background: var(--gold);
  display: inline-block;
}

/* 通用章节 */
.page-about .about-section {
  position: relative;
  padding: 64px 20px 72px;
}
.page-about .about-section h2 {
  font-family: var(--font-title);
  font-size: clamp(28px, 4.6vw, 40px);
  line-height: 1.2;
  margin: 12px 0 18px;
  letter-spacing: 0.02em;
}
.page-about .about-section .section-index {
  display: inline-block;
  padding: 4px 10px;
  color: var(--gold);
  font-family: var(--font-data);
  font-size: 14px;
  letter-spacing: 0.14em;
  background: transparent;
  transition: background var(--transition-fast), color var(--transition-fast);
}

/* 章节高亮 */
.page-about[data-current-section="from-canal"] .about-chapter-nav a[href="#from-canal"],
.page-about[data-current-section="milestones"] .about-chapter-nav a[href="#milestones"],
.page-about[data-current-section="cultural-gene"] .about-chapter-nav a[href="#cultural-gene"],
.page-about[data-current-section="team-honor"] .about-chapter-nav a[href="#team-honor"] {
  color: var(--water-green);
  border-bottom-color: var(--water-green);
}
.page-about[data-current-section="from-canal"] #from-canal .section-index,
.page-about[data-current-section="milestones"] #milestones .section-index,
.page-about[data-current-section="cultural-gene"] #cultural-gene .section-index,
.page-about[data-current-section="team-honor"] #team-honor .section-index {
  background: var(--water-green);
  color: var(--ink-black);
}

/* 从运河出发 */
.page-about .about-canal {
  background: var(--light-cyan);
}
.page-about .about-canal::before {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.08;
  background-image: radial-gradient(circle at 10% 20%, var(--water-green) 1px, transparent 1px);
  background-size: 26px 26px;
  pointer-events: none;
}
.page-about .about-canal-inner {
  position: relative;
  z-index: 1;
  max-width: var(--content-max);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 40px;
}
.page-about .about-canal-copy {
  flex: 1 1 62%;
  max-width: 720px;
}
.page-about .about-canal-copy p {
  font-size: 16px;
  line-height: 1.9;
  color: rgba(26, 26, 26, 0.82);
  margin-bottom: 16px;
}
.page-about .about-canal-copy .about-canal-lead {
  font-size: 19px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--ink-black);
}
.page-about .about-quote {
  margin: 28px 0;
  padding: 20px 24px 20px 28px;
  background: var(--rice-white);
  position: relative;
}
.page-about .about-quote p {
  font-family: var(--font-title);
  font-size: 18px;
  line-height: 1.7;
  color: var(--ink-black);
  margin: 0;
}
.page-about .about-quote::before {
  content: "“";
  position: absolute;
  top: -22px;
  left: 16px;
  font-size: 66px;
  color: var(--gold);
  line-height: 1;
  font-family: var(--font-title);
}

/* 档案卡 */
.page-about .about-canal-aside {
  flex: 0 1 38%;
  align-self: flex-start;
  background: var(--light-gold);
  padding: 28px 24px;
  position: relative;
  margin: 0;
}
.page-about .about-canal-aside h3 {
  font-family: var(--font-title);
  font-size: 16px;
  letter-spacing: 0.12em;
  margin: 0 0 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--gold);
  display: inline-block;
}
.page-about .about-archive {
  margin: 0;
  display: grid;
  gap: 12px;
}
.page-about .about-archive-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  font-size: 14px;
}
.page-about .about-archive-row dt {
  color: var(--blue-gray);
}
.page-about .about-archive-row dd {
  margin: 0;
  font-weight: 600;
  color: var(--ink-black);
}
.page-about .about-archive-row .data-number {
  font-size: 22px;
  line-height: 1;
  color: var(--wine-red);
  font-weight: 400;
}

/* CTA 按钮组 */
.page-about .about-canal-cta,
.page-about .about-team-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}
.page-about .about-canal-cta {
  margin-top: 24px;
}

/* 里程碑 */
.page-about .about-milestones {
  background: var(--light-gold);
}
.page-about .about-milestones-head {
  max-width: var(--content-max);
  margin: 0 auto 48px;
}
.page-about .about-milestones-head > p {
  color: var(--blue-gray);
  font-size: 15px;
  margin: 0;
}

/* 时间线（移动端） */
.page-about .about-timeline {
  position: relative;
  max-width: var(--content-max);
  margin: 0 auto;
  padding-left: 30px;
}
.page-about .about-timeline-svg {
  display: none;
}
.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(to bottom, var(--gold), var(--water-green) 55%, var(--wine-red));
  border-radius: 2px;
}
.page-about .about-timeline-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 36px;
}
.page-about .about-tl-item {
  position: relative;
}
.page-about .about-tl-item::before {
  content: "";
  position: absolute;
  left: -27px;
  top: 6px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--light-cyan);
  border: 3px solid var(--gold);
  box-shadow: 0 0 0 4px rgba(212, 175, 55, 0.18);
}
.page-about .about-tl-year {
  display: block;
  font-family: var(--font-data);
  font-size: 38px;
  line-height: 1;
  color: var(--water-green);
  margin-bottom: 10px;
}
.page-about .about-tl-card {
  background: var(--rice-white);
  border: 1px solid rgba(26, 26, 26, 0.06);
  border-left: 3px solid var(--gold);
  padding: 18px 20px;
  box-shadow: 4px 4px 0 rgba(0, 180, 160, 0.08);
}
.page-about .about-tl-card h3 {
  font-family: var(--font-title);
  font-size: 18px;
  margin: 0 0 8px;
}
.page-about .about-tl-card p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--blue-gray);
  margin: 0;
}

/* 文化基因 */
.page-about .about-culture {
  background: var(--indigo);
  color: var(--rice-white);
}
.page-about .about-culture-head {
  max-width: var(--content-max);
  margin: 0 auto 36px;
}
.page-about .about-culture-head > p {
  color: rgba(248, 246, 240, 0.65);
  font-size: 15px;
  margin: 0;
}
.page-about .about-culture h2 {
  color: var(--rice-white);
}
.page-about .about-culture-grid {
  max-width: var(--content-max);
  margin: 0 auto;
  display: grid;
  gap: 20px;
}
.page-about .about-culture-item {
  position: relative;
  padding: 36px 26px 30px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.05);
  overflow: hidden;
}
.page-about .about-culture-item::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
}
.page-about .about-culture-ink::after {
  background: var(--water-green);
}
.page-about .about-culture-garden::after {
  background: var(--gold);
}
.page-about .about-culture-canal::after {
  background: var(--wine-red);
}
.page-about .about-culture-sym {
  display: inline-block;
  font-family: var(--font-title);
  font-size: 56px;
  line-height: 1;
  color: rgba(255, 255, 255, 0.16);
  position: absolute;
  right: 18px;
  bottom: 8px;
  transform: rotate(-8deg);
  pointer-events: none;
}
.page-about .about-culture-item h3 {
  font-family: var(--font-title);
  font-size: 20px;
  margin: 0 0 10px;
  color: var(--rice-white);
}
.page-about .about-culture-item p {
  font-size: 15px;
  line-height: 1.75;
  color: rgba(248, 246, 240, 0.75);
  margin: 0;
  max-width: 360px;
}

/* 团队与认可 */
.page-about .about-team {
  background: var(--ink-black);
  color: var(--rice-white);
}
.page-about .about-team-inner {
  max-width: var(--content-max);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 48px;
}
.page-about .about-team-copy {
  flex: 1 1 55%;
}
.page-about .about-team h2 {
  color: var(--rice-white);
}
.page-about .about-team .section-index {
  color: var(--gold);
}
.page-about .about-team-lead {
  font-size: 19px;
  line-height: 1.65;
  color: rgba(248, 246, 240, 0.9);
  margin-bottom: 14px;
}
.page-about .about-team-copy > p {
  font-size: 15px;
  line-height: 1.85;
  color: rgba(248, 246, 240, 0.68);
}
.page-about .about-stats {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.1);
}
.page-about .about-stat {
  background: var(--ink-black);
  padding: 18px 14px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  text-align: center;
}
.page-about .about-stat .data-number {
  font-family: var(--font-data);
  font-size: 30px;
  line-height: 1.2;
  color: var(--water-green);
}
.page-about .about-stat span:last-child {
  font-size: 13px;
  color: rgba(248, 246, 240, 0.55);
  letter-spacing: 0.05em;
}
.page-about .about-team-figure {
  margin: 28px 0 0;
}
.page-about .about-team-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid rgba(212, 175, 55, 0.35);
}
.page-about .about-honor {
  flex: 0 1 45%;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(212, 175, 55, 0.3);
  padding: 28px 24px;
  position: relative;
}
.page-about .about-honor h3 {
  font-family: var(--font-title);
  font-size: 20px;
  margin: 0 0 8px;
  color: var(--rice-white);
}
.page-about .about-honor-lead {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(248, 246, 240, 0.55);
  margin-bottom: 20px;
}
.page-about .about-honor-list {
  list-style: none;
  margin: 0 0 22px;
  padding: 0;
  display: grid;
  gap: 10px;
}
.page-about .about-honor-list li {
  display: flex;
  gap: 10px;
  align-items: baseline;
  font-size: 14px;
  line-height: 1.6;
  color: rgba(248, 246, 240, 0.85);
  padding-bottom: 10px;
  border-bottom: 1px dashed rgba(255, 255, 255, 0.12);
}
.page-about .about-honor-mark {
  color: var(--gold);
  font-size: 12px;
  flex: 0 0 auto;
}
.page-about .about-honor-figure {
  margin: 0;
}
.page-about .about-honor-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid rgba(255, 255, 255, 0.12);
}
.page-about .about-team-cta {
  margin-top: 24px;
}
.page-about .about-team-cta .btn-outline {
  color: var(--rice-white);
  border-color: var(--gold);
}

/* 内容显现过渡 */
.page-about [data-reveal] {
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}
.page-about [data-reveal][data-visible] {
  opacity: 1;
  transform: none;
}

/* ===== 桌面端 ===== */
@media (min-width: 640px) {
  .page-about .about-chapter-nav {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 768px) {
  .page-about .about-hero {
    padding: 56px 32px 40px;
  }
  .page-about .about-hero-inner {
    flex-direction: row;
    align-items: center;
    gap: 48px;
  }
  .page-about .about-hero-figure {
    flex: 1 1 46%;
  }
  .page-about .about-section {
    padding: 80px 32px 88px;
  }
  .page-about .about-canal-inner {
    flex-direction: row;
    gap: 56px;
    align-items: flex-start;
  }
  .page-about .about-canal-aside {
    position: sticky;
    top: 96px;
  }
  .page-about .about-culture-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }
  .page-about .about-culture-item {
    padding: 44px 30px 36px;
  }
  .page-about .about-culture-garden {
    transform: translateY(22px);
  }
  .page-about .about-team-inner {
    flex-direction: row;
    gap: 56px;
    align-items: flex-start;
  }
  .page-about .about-honor {
    position: sticky;
    top: 96px;
  }
}

@media (min-width: 900px) {
  .page-about .about-timeline {
    padding-left: 0;
  }
  .page-about .about-timeline-svg {
    display: block;
    position: absolute;
    top: -40px;
    left: 0;
    width: 100%;
    height: 200px;
    z-index: 0;
    opacity: 0.6;
    pointer-events: none;
  }
  .page-about .about-timeline-list {
    position: relative;
    z-index: 1;
    grid-template-columns: repeat(2, 1fr);
    column-gap: 60px;
    row-gap: 40px;
  }
  .page-about .about-timeline::before {
    left: 50%;
    transform: translateX(-50%) rotate(1.5deg);
    width: 2px;
    background: linear-gradient(to bottom, var(--gold), var(--water-green) 55%, var(--wine-red));
  }
  .page-about .about-tl-item:nth-child(odd) {
    grid-column: 1;
    text-align: right;
    padding-right: 48px;
  }
  .page-about .about-tl-item:nth-child(odd)::before {
    left: auto;
    right: -24px;
  }
  .page-about .about-tl-item:nth-child(odd) .about-tl-card {
    border-left: 1px solid rgba(26, 26, 26, 0.06);
    border-right: 3px solid var(--gold);
  }
  .page-about .about-tl-item:nth-child(even) {
    grid-column: 2;
    padding-left: 48px;
  }
  .page-about .about-tl-item:nth-child(even)::before {
    left: -24px;
  }
  .page-about .about-tl-year {
    font-size: 44px;
  }
}