.page-about {
  background: var(--paper);
  overflow-x: hidden;
}

/* ===== 首屏 Hero ===== */
.page-about .about-hero {
  position: relative;
  background: radial-gradient(1200px 600px at 90% 0%, rgba(212,160,23,0.12), transparent 60%), var(--green-deep);
  color: var(--paper);
  padding: calc(var(--header-h) + clamp(2rem, 6vw, 4rem)) var(--gutter) clamp(2.4rem, 5vw, 4rem);
}

.page-about .about-hero::after {
  content: "";
  display: block;
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 5px;
  background: linear-gradient(90deg, var(--gold) 0 28px, transparent 28px 36px, var(--green-support) 36px 72px, transparent 72px 80px, var(--gold) 80px 104px, transparent 104px 112px);
  background-size: 112px 5px;
  opacity: 0.85;
}

.page-about .about-hero__grid {
  max-width: var(--container-w);
  margin-inline: auto;
  display: flex;
  flex-direction: column;
  gap: 2.2rem;
}

.page-about .about-hero__copy {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.page-about .about-hero .breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.82rem;
  color: rgba(245,240,225,0.6);
  margin-bottom: 1.4rem;
  padding: 0.35rem 0.7rem;
  background: rgba(245,240,225,0.05);
  border-left: 2px solid var(--gold);
}

.page-about .about-hero .breadcrumb a {
  color: var(--gold);
  text-decoration: none;
  transition: opacity 0.2s;
}

.page-about .about-hero .breadcrumb a:hover {
  opacity: 0.7;
}

.page-about .about-hero__kicker {
  color: var(--gold);
  margin-bottom: 0.4rem;
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-size: clamp(2.6rem, 7.5vw, 5.2rem);
  font-weight: 700;
  line-height: 0.98;
  letter-spacing: 0.015em;
  text-transform: uppercase;
  color: #fff;
  margin: 0 0 1.1rem;
  max-width: 10ch;
}

.page-about .about-hero__lead {
  font-size: clamp(1rem, 2.2vw, 1.2rem);
  line-height: 1.75;
  color: rgba(245,240,225,0.85);
  max-width: 40rem;
  margin: 0 0 1.8rem;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  width: 100%;
  max-width: 36rem;
  gap: 1px;
  background: rgba(212,160,23,0.3);
  border: 1px solid rgba(212,160,23,0.3);
  margin-bottom: 1.3rem;
}

.page-about .hero-stat {
  background: rgba(11,61,46,0.96);
  padding: 1rem 1.1rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  min-height: 5.2rem;
  justify-content: center;
}

.page-about .hero-stat__num {
  font-family: var(--font-data);
  font-size: clamp(1.45rem, 3.4vw, 2.2rem);
  line-height: 1;
  color: var(--gold);
}

.page-about .hero-stat__label {
  font-size: 0.76rem;
  letter-spacing: 0.04em;
  color: rgba(245,240,225,0.66);
}

.page-about .about-hero__tip {
  font-size: 0.85rem;
  color: rgba(212,160,23,0.85);
  border-left: 2px solid var(--gold);
  padding-left: 0.8rem;
  margin: 0;
}

.page-about .about-hero__media {
  position: relative;
  max-width: 34rem;
  margin-inline: auto;
  width: 100%;
}

.page-about .about-hero__frame {
  clip-path: polygon(0 0, calc(100% - 30px) 0, 100% 30px, 100% 100%, 30px 100%, 0 calc(100% - 30px));
  background: rgba(212,160,23,0.08);
}

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

.page-about .about-hero__note {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-top: 1rem;
  color: rgba(245,240,225,0.6);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
}

.page-about .about-hero__note-line {
  width: 2.2rem;
  height: 2px;
  background: var(--gold);
  display: inline-block;
}

/* ===== 章节目录 ===== */
.page-about .about-index {
  display: flex;
  overflow-x: auto;
  gap: 0.5rem;
  padding: 0.8rem var(--gutter);
  background: var(--paper);
  border-bottom: 1px solid var(--line-faint);
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

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

.page-about .about-index .chapter-index__link {
  flex: 1 0 auto;
  text-align: center;
  padding: 0.5rem 1.15rem;
  border: 1px solid var(--line-faint);
  background: #fff;
  color: var(--ink);
  font-size: 0.78rem;
  font-weight: 600;
  text-decoration: none;
  transition: background 0.25s, color 0.25s, border-color 0.25s;
}

.page-about .about-index .chapter-index__link:hover,
.page-about .about-index .chapter-index__link.is-active {
  background: var(--green-deep);
  border-color: var(--green-deep);
  color: var(--paper);
}

/* ===== 品牌故事 ===== */
.page-about .about-story {
  background: var(--paper);
  padding: var(--section-space) var(--gutter);
}

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

.page-about .about-story__head {
  margin-bottom: 2.2rem;
}

.page-about .about-story__body {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.6rem;
}

.page-about .about-story__lead {
  font-size: clamp(1.15rem, 2.5vw, 1.45rem);
  font-weight: 600;
  line-height: 1.65;
  color: var(--green-deep);
  border-top: 4px solid var(--gold);
  padding-top: 1.1rem;
  margin: 0;
}

.page-about .about-story__text p {
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--slate);
  margin: 0 0 1rem;
}

.page-about .about-story__text p:first-child {
  color: var(--ink);
}

.page-about .about-story__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
  padding: 0;
  margin: 1.6rem 0 0;
}

.page-about .about-story__tags li {
  background: rgba(46,139,87,0.08);
  border: 1px solid rgba(46,139,87,0.25);
  color: var(--green-deep);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  padding: 0.35rem 0.9rem;
}

/* ===== 发展里程碑 ===== */
.page-about .about-milestones {
  position: relative;
  background: linear-gradient(180deg, rgba(212,160,23,0.05), transparent 32%), var(--green-deep);
  color: var(--paper);
  padding: var(--section-space) var(--gutter);
  overflow: hidden;
}

.page-about .about-milestones::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--gold), var(--green-support) 45%, var(--gold) 90%);
  opacity: 0.7;
}

.page-about .about-milestones__svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  opacity: 0.5;
}

.page-about .about-milestones__wrap {
  position: relative;
  max-width: var(--container-w);
  margin-inline: auto;
}

.page-about .about-milestones__head {
  margin-bottom: 3rem;
  max-width: 44rem;
}

.page-about .about-milestones__desc {
  color: rgba(245,240,225,0.72);
  font-size: 1rem;
  line-height: 1.6;
  margin: 0.7rem 0 0;
}

.page-about .timeline {
  position: relative;
  max-width: 1000px;
  margin-inline: auto;
  padding: 0.5rem 0 2rem;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 12px;
  width: 2px;
  background: repeating-linear-gradient(to bottom, rgba(212,160,23,0.75) 0 5px, transparent 5px 10px);
}

.page-about .timeline__item {
  position: relative;
  padding-left: 48px;
  margin-bottom: 2.4rem;
}

.page-about .timeline__marker {
  position: absolute;
  left: 0;
  top: 24px;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--green-deep-2);
  border: 2px solid var(--gold);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-data);
  font-size: 0.6rem;
  color: var(--gold);
  z-index: 1;
}

.page-about .timeline__panel {
  background: rgba(245,240,225,0.05);
  border: 1px solid rgba(245,240,225,0.1);
  border-left: 3px solid var(--gold);
  padding: 1.2rem 1.4rem;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.page-about .timeline__panel:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow-card);
}

.page-about .timeline__item:nth-child(1) .timeline__panel {
  background: rgba(46,139,87,0.1);
}

.page-about .timeline__item:nth-child(2) .timeline__panel {
  background: rgba(212,160,23,0.06);
}

.page-about .timeline__item:nth-child(3) .timeline__panel {
  background: rgba(139,0,0,0.06);
}

.page-about .timeline__item:nth-child(4) .timeline__panel {
  background: rgba(0,200,83,0.05);
}

.page-about .timeline__item:nth-child(5) .timeline__panel {
  background: rgba(212,160,23,0.08);
}

.page-about .timeline__panel .badge {
  display: inline-block;
  margin-bottom: 0.45rem;
}

.page-about .timeline__panel h3 {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: #fff;
  margin: 0 0 0.4rem;
  text-transform: uppercase;
}

.page-about .timeline__panel p {
  color: rgba(245,240,225,0.72);
  font-size: 0.86rem;
  line-height: 1.7;
  margin: 0;
}

/* ===== 平台规模 ===== */
.page-about .about-scale {
  background: var(--paper);
  padding: var(--section-space) var(--gutter);
}

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

.page-about .about-scale__head {
  max-width: 44rem;
  margin-bottom: 2.5rem;
}

.page-about .about-scale__desc {
  color: var(--slate);
  font-size: 1rem;
  line-height: 1.6;
  margin: 0.6rem 0 0;
}

.page-about .about-scale__grid {
  display: grid;
  gap: 2.5rem;
  align-items: start;
}

.page-about .about-scale__stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.page-about .scale-card {
  background: #fff;
  border: 1px solid var(--line-faint);
  border-top: 3px solid var(--gold);
  padding: 1.4rem 1.4rem;
  display: flex;
  flex-direction: column;
  min-height: 10.5rem;
  box-shadow: 0 4px 16px rgba(11,61,46,0.04);
}

.page-about .scale-card__num {
  font-family: var(--font-data);
  font-size: clamp(2.2rem, 5vw, 3.2rem);
  line-height: 1;
  color: var(--green-deep);
  letter-spacing: -0.02em;
}

.page-about .scale-card__plus {
  color: var(--gold);
  margin-left: 0.06em;
}

.page-about .scale-card__label {
  display: block;
  font-weight: 700;
  font-size: 0.92rem;
  color: var(--ink);
  margin-top: 0.7rem;
}

.page-about .scale-card__desc {
  font-size: 0.82rem;
  color: var(--slate);
  line-height: 1.6;
  margin: 0.4rem 0 0;
}

.page-about .about-scale__media img {
  width: 100%;
  height: auto;
  display: block;
}

.page-about .about-scale__caption {
  font-size: 0.78rem;
  color: var(--slate);
  margin: 0.6rem 0 0;
  border-left: 2px solid var(--green-support);
  padding-left: 0.65rem;
}

/* ===== 团队与组织 ===== */
.page-about .about-team {
  background: linear-gradient(180deg, rgba(46,139,87,0.05), rgba(46,139,87,0.02));
  border-top: 1px solid var(--line-faint);
  border-bottom: 1px solid var(--line-faint);
  padding: var(--section-space) var(--gutter);
}

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

.page-about .about-team__head {
  margin-bottom: 2.5rem;
}

.page-about .about-team__grid {
  display: grid;
  gap: 2.2rem;
}

.page-about .about-team__lead {
  font-size: clamp(1.1rem, 2.2vw, 1.3rem);
  font-weight: 600;
  line-height: 1.65;
  color: var(--green-deep);
  margin: 0 0 1.5rem;
}

.page-about .team-list {
  border-top: 1px solid var(--line-faint);
}

.page-about .team-list__item {
  display: flex;
  gap: 1rem;
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--line-faint);
}

.page-about .team-list__index {
  font-family: var(--font-data);
  color: var(--gold);
  font-size: 0.78rem;
  padding-top: 0.3rem;
  min-width: 2ch;
}

.page-about .team-list__body h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--ink);
  margin: 0 0 0.3rem;
}

.page-about .team-list__body p {
  color: var(--slate);
  font-size: 0.86rem;
  line-height: 1.65;
  margin: 0;
}

.page-about .about-team__content .btn {
  margin-top: 1.6rem;
}

.page-about .about-team__media img {
  width: 100%;
  height: auto;
  display: block;
}

.page-about .about-team__caption {
  font-size: 0.78rem;
  color: var(--slate);
  margin: 0.6rem 0 0;
  border-left: 2px solid var(--gold);
  padding-left: 0.65rem;
}

/* ===== 荣誉与认可 ===== */
.page-about .about-honor {
  background: radial-gradient(900px 420px at 15% 0%, rgba(212,160,23,0.1), transparent 55%), var(--green-deep);
  color: var(--paper);
  padding: var(--section-space) var(--gutter);
}

.page-about .about-honor__wrap {
  max-width: var(--container-w);
  margin-inline: auto;
  display: grid;
  gap: 2.5rem;
}

.page-about .about-honor__lead {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.page-about .about-honor__lead > p:not(.eyebrow) {
  color: rgba(245,240,225,0.76);
  line-height: 1.75;
  font-size: 1rem;
  margin: 0.8rem 0 1.6rem;
  max-width: 30rem;
}

.page-about .about-honor__cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.page-about .honor-card {
  background: rgba(245,240,225,0.05);
  border: 1px solid rgba(245,240,225,0.12);
  border-top: 3px solid var(--gold);
  padding: 1.4rem 1.3rem;
  display: flex;
  flex-direction: column;
}

.page-about .honor-card__num {
  font-family: var(--font-data);
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  line-height: 1;
  color: var(--gold);
  margin-bottom: 0.65rem;
}

.page-about .honor-card h3 {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: #fff;
  margin: 0 0 0.4rem;
}

.page-about .honor-card p {
  font-size: 0.82rem;
  line-height: 1.62;
  color: rgba(245,240,225,0.66);
  margin: 0;
}

/* ===== CTA ===== */
.page-about .about-cta {
  background: linear-gradient(120deg, rgba(245,240,225,0.16), transparent 55%), var(--gold);
  padding: clamp(3rem, 7vw, 5rem) var(--gutter);
}

.page-about .about-cta__inner {
  max-width: 760px;
  margin-inline: auto;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.page-about .about-cta .eyebrow {
  color: var(--green-deep);
}

.page-about .about-cta h2 {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  line-height: 1.05;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--green-deep);
  margin: 0.2rem 0 0.85rem;
}

.page-about .about-cta p:not(.eyebrow) {
  color: rgba(11,61,46,0.85);
  font-size: 0.98rem;
  line-height: 1.75;
  max-width: 40rem;
  margin: 0 0 1.6rem;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.page-about .about-cta .btn--dark {
  background: var(--green-deep);
  color: var(--paper);
}

.page-about .about-cta .btn--outline {
  border-color: var(--green-deep);
  color: var(--green-deep);
}

/* ===== 共享类页面级微调 ===== */
.page-about .section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4.5vw, 3.2rem);
  line-height: 1.1;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  margin: 0.2rem 0 0;
}

.page-about .section-title--light {
  color: var(--paper);
}

.page-about .eyebrow {
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold);
  font-weight: 600;
  margin: 0;
}

.page-about .badge {
  background: rgba(212,160,23,0.14);
  border: 1px solid rgba(212,160,23,0.35);
  color: var(--gold);
  font-size: 0.68rem;
  padding: 0.2rem 0.6rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 600;
  line-height: 1.4;
}

/* ===== 桌面端增强 ===== */
@media (min-width: 860px) {
  .page-about .about-hero__grid {
    display: grid;
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.6fr);
    gap: 3rem;
    align-items: center;
  }

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

  .page-about .about-hero__media {
    margin-inline: 0;
  }

  .page-about .about-story__body {
    grid-template-columns: minmax(0, 0.6fr) minmax(0, 1.4fr);
    gap: 3rem;
  }

  .page-about .about-story__tags {
    margin-top: 0;
  }

  .page-about .timeline::before {
    left: 50%;
    transform: translateX(-1px);
  }

  .page-about .timeline__item {
    width: 50%;
    padding-left: 0;
    padding-right: 3.2rem;
    margin-bottom: 3rem;
  }

  .page-about .timeline__item:nth-child(even) {
    margin-left: 50%;
    padding-left: 3.2rem;
    padding-right: 0;
  }

  .page-about .timeline__marker {
    left: auto;
    right: -12px;
  }

  .page-about .timeline__item:nth-child(even) .timeline__marker {
    right: auto;
    left: -12px;
  }

  .page-about .timeline__panel {
    padding: 1.5rem 1.8rem;
  }

  .page-about .about-scale__grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 0.8fr);
    gap: 3.5rem;
  }

  .page-about .about-scale__stats {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.9fr);
    gap: 4rem;
    align-items: center;
  }

  .page-about .about-honor__wrap {
    grid-template-columns: minmax(0, 0.75fr) minmax(0, 1.25fr);
    gap: 4rem;
  }

  .page-about .about-honor__cards {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 520px) and (max-width: 859px) {
  .page-about .about-honor__cards,
  .page-about .about-scale__stats {
    grid-template-columns: repeat(2, 1fr);
  }
}