/* ===== 品牌故事页专属样式 ===== */
.page-about {
  --font-serif: Georgia, 'Times New Roman', 'Songti SC', 'SimSun', serif;
  --about-border: 3px solid var(--c-black);
  --about-shadow: 8px 8px 0 var(--c-black);
  --about-shadow-gold: 8px 8px 0 var(--c-gold);
  background: var(--c-white);
  color: var(--c-dark);
  font-family: var(--font-body);
  overflow-x: clip;
}

/* 面包屑 */
.page-about .breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  margin-bottom: 28px;
  padding: 8px 0;
}
.page-about .breadcrumb a {
  color: var(--c-navy);
  font-weight: 700;
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: border-color 0.2s ease;
}
.page-about .breadcrumb a:hover {
  border-color: var(--c-gold);
}
.page-about .breadcrumb [aria-hidden="true"] {
  color: var(--c-gray);
}
.page-about .breadcrumb span:last-child {
  color: var(--c-dark);
  font-weight: 500;
}

/* 通用眉题 */
.page-about .about-eyebrow {
  display: inline-flex;
  align-items: center;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-navy);
  margin: 0 0 12px;
}
.page-about .about-eyebrow::before {
  content: '';
  width: 10px;
  height: 10px;
  margin-right: 8px;
  background: var(--c-gold);
  border: 2px solid var(--c-black);
}

/* ===== Hero ===== */
.page-about .about-hero {
  display: grid;
  gap: 28px;
  align-items: center;
  margin-bottom: 72px;
  position: relative;
}
.page-about .about-hero__media {
  position: relative;
  border: var(--about-border);
  box-shadow: var(--shadow);
  background: var(--c-lightgray);
}
.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: auto;
}
.page-about .about-badge {
  position: absolute;
  top: 12px;
  left: 12px;
  background: var(--c-gold);
  color: var(--c-black);
  border: 2px solid var(--c-black);
  padding: 6px 10px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
}
.page-about .about-hero__content h1 {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  line-height: 1.08;
  color: var(--c-black);
  margin: 14px 0 20px;
  letter-spacing: -0.015em;
}
.page-about .about-hero__lead {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--c-dark);
  margin: 0 0 14px;
}
.page-about .about-hero__desc {
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--c-gray);
  margin: 0 0 20px;
}
.page-about .about-hero__tags {
  list-style: none;
  margin: 0 0 28px;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.page-about .about-hero__tags li {
  background: var(--c-lightgray);
  border: 2px solid var(--c-black);
  padding: 8px 14px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  transition: background 0.2s ease;
}
.page-about .about-hero__tags .about-hero__tag--hot {
  background: var(--c-red);
  color: var(--c-white);
}
.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 20px;
}
.page-about .about-hero__actions .btn {
  min-width: 0;
}
.page-about .btn-link {
  display: inline-block;
  font-weight: 700;
  color: var(--c-navy);
  border-bottom: 3px solid var(--c-gold);
  text-decoration: none;
  padding: 8px 0;
}
.page-about .btn-link:hover {
  color: var(--c-black);
  background: var(--c-lightgray);
}

/* ===== 使命区块 ===== */
.page-about .about-mission {
  position: relative;
  margin: 72px 0;
  padding: 40px 28px 36px;
  background: var(--c-lightgray);
  border-left: 8px solid var(--c-gold);
  border-top: var(--about-border);
  border-bottom: var(--about-border);
}
.page-about .about-mission__label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--c-black);
  color: var(--c-white);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  padding: 6px 12px;
  margin-bottom: 22px;
}
.page-about .about-mission__label::before {
  content: '';
  width: 8px;
  height: 8px;
  background: var(--c-gold);
}
.page-about .about-mission blockquote {
  margin: 0;
  max-width: 820px;
}
.page-about .about-mission blockquote p {
  font-family: var(--font-serif);
  font-size: clamp(1.4rem, 2.8vw, 2.2rem);
  line-height: 1.45;
  font-weight: 700;
  color: var(--c-black);
  margin: 0 0 16px;
}
.page-about .about-mission__note {
  font-size: 0.9rem;
  color: var(--c-navy);
  margin: 0;
}

/* ===== 时间轴 ===== */
.page-about .about-timeline-section {
  margin: 72px 0;
  position: relative;
}
.page-about .about-timeline__intro {
  margin-bottom: 36px;
  max-width: 640px;
}
.page-about .about-timeline__intro h2,
.page-about .about-ecosystem__head h2,
.page-about .about-honor__inner h2,
.page-about .about-connect__inner h2 {
  font-family: var(--font-serif);
  font-size: clamp(1.8rem, 3.6vw, 2.8rem);
  line-height: 1.2;
  margin: 10px 0 14px;
  letter-spacing: -0.01em;
  color: var(--c-black);
}
.page-about .about-timeline__desc {
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--c-gray);
  margin: 0;
}
.page-about .about-timeline__visual {
  margin: 0 0 40px;
  border: var(--about-border);
  box-shadow: var(--shadow);
  background: var(--c-navy);
}
.page-about .about-timeline__visual img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  opacity: 0.94;
}
.page-about .about-timeline__list {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}
.page-about .about-timeline__list::before {
  content: '';
  position: absolute;
  left: 22px;
  top: 12px;
  bottom: 20px;
  width: 3px;
  background: var(--c-gold);
}
.page-about .about-milestone {
  position: relative;
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 20px;
  padding-bottom: 36px;
}
.page-about .about-milestone__num {
  position: relative;
  z-index: 2;
  width: 44px;
  height: 44px;
  background: var(--c-white);
  border: 3px solid var(--c-black);
  box-shadow: var(--shadow-sm);
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 0.9rem;
  display: grid;
  place-items: center;
  color: var(--c-black);
}
.page-about .about-milestone:nth-child(2) .about-milestone__num {
  background: var(--c-navy);
  color: var(--c-white);
}
.page-about .about-milestone:nth-child(4) .about-milestone__num {
  background: var(--c-black);
  color: var(--c-white);
}
.page-about .about-milestone:nth-child(5) .about-milestone__num {
  background: var(--c-gold);
}
.page-about .about-milestone__card {
  max-width: 700px;
  min-width: 0;
  background: var(--c-white);
  border: var(--about-border);
  box-shadow: var(--shadow-sm);
  padding: 20px 22px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.page-about .about-milestone__card:hover {
  transform: translate(-2px, -2px);
  box-shadow: var(--about-shadow-gold);
}
.page-about .about-milestone__card h3 {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--c-black);
  margin: 0 0 10px;
}
.page-about .about-milestone__card > p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--c-dark);
}
.page-about .about-details {
  margin-top: 12px;
  border-top: 2px solid var(--c-lightgray);
  padding-top: 12px;
  font-size: 0.9rem;
  line-height: 1.7;
}
.page-about .about-details summary {
  cursor: pointer;
  font-weight: 700;
  color: var(--c-navy);
  list-style: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  user-select: none;
}
.page-about .about-details summary::-webkit-details-marker {
  display: none;
}
.page-about .about-details summary::before {
  content: '+';
  display: inline-grid;
  place-items: center;
  width: 18px;
  height: 18px;
  background: var(--c-gold);
  border: 2px solid var(--c-black);
  font-weight: 700;
  line-height: 1;
}
.page-about .about-details[open] summary::before {
  content: '−';
}
.page-about .about-details[open] summary {
  margin-bottom: 8px;
}
.page-about .about-details p {
  margin: 0;
  color: var(--c-gray);
}

/* ===== 合作生态 ===== */
.page-about .about-ecosystem {
  margin: 72px 0;
}
.page-about .about-ecosystem__head {
  max-width: 680px;
  margin-bottom: 32px;
}
.page-about .about-ecosystem__head h2,
.page-about .about-ecosystem__head p {
  color: var(--c-black);
}
.page-about .about-ecosystem__head p:last-child {
  font-size: 0.95rem;
  color: var(--c-gray);
  line-height: 1.7;
  margin: 0;
}
.page-about .about-ecosystem__grid {
  display: grid;
  gap: 20px;
  margin-bottom: 32px;
}
.page-about .about-eco-card {
  position: relative;
  min-width: 0;
  background: var(--c-lightgray);
  border: var(--about-border);
  box-shadow: var(--shadow-sm);
  padding: 24px 22px 28px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  overflow: hidden;
}
.page-about .about-eco-card:hover {
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow);
}
.page-about .about-eco-card__index {
  display: block;
  font-family: var(--font-serif);
  font-size: 3.2rem;
  font-weight: 700;
  line-height: 1;
  margin-bottom: 18px;
  color: var(--c-gold);
  -webkit-text-stroke: 2px var(--c-black);
}
.page-about .about-eco-card h3 {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--c-black);
  margin: 0 0 10px;
}
.page-about .about-eco-card p {
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--c-dark);
  margin: 0;
}
.page-about .about-eco-card--navy {
  background: var(--c-navy);
}
.page-about .about-eco-card--navy h3 {
  color: var(--c-white);
}
.page-about .about-eco-card--navy p {
  color: rgba(255, 255, 255, 0.88);
}
.page-about .about-ecosystem__media {
  max-width: 660px;
  border: var(--about-border);
  box-shadow: var(--shadow);
  background: var(--c-navy);
}
.page-about .about-ecosystem__media img {
  display: block;
  width: 100%;
  height: auto;
}

/* ===== 荣誉与资质 ===== */
.page-about .about-honor {
  background: var(--c-navy);
  border-top: 6px solid var(--c-gold);
  border-bottom: 4px solid var(--c-black);
  padding: 64px 0 72px;
  margin: 72px 0;
}
.page-about .about-honor__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}
.page-about .about-honor .about-eyebrow {
  color: var(--c-gold);
}
.page-about .about-honor__inner h2 {
  color: var(--c-white);
}
.page-about .about-honor__desc {
  max-width: 620px;
  font-size: 1rem;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.86);
  margin: 0 0 36px;
}
.page-about .about-honor__stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin: 0 0 32px;
}
.page-about .about-honor__stat {
  border: 2px solid rgba(255, 255, 255, 0.25);
  padding: 18px 20px;
  background: rgba(0, 0, 0, 0.16);
}
.page-about .about-honor__stat dt {
  font-size: 0.74rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.68);
  margin: 0;
}
.page-about .about-honor__stat dd {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--c-gold);
  margin: 8px 0 0;
  line-height: 1.1;
}
.page-about .about-honor__award {
  display: flex;
  align-items: center;
  gap: 18px;
  background: var(--c-black);
  color: var(--c-white);
  padding: 20px 24px;
  border: 3px solid var(--c-gold);
  margin-bottom: 24px;
}
.page-about .about-honor__award-badge {
  width: 52px;
  height: 52px;
  flex: none;
  display: grid;
  place-items: center;
  background: var(--c-gold);
  color: var(--c-black);
  font-size: 1.3rem;
  border: 2px solid var(--c-black);
}
.page-about .about-honor__award h3 {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--c-gold);
  margin: 0 0 4px;
}
.page-about .about-honor__award p {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.78);
  margin: 0;
}
.page-about .about-honor__trust {
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.66);
  max-width: 640px;
  line-height: 1.7;
  margin: 0;
  padding-left: 14px;
  border-left: 3px solid var(--c-gold);
}

/* ===== 行动号召 ===== */
.page-about .about-connect {
  margin: 0 0 72px;
  background: var(--c-black);
  color: var(--c-white);
  border-top: 6px solid var(--c-gold);
  padding: 56px 20px;
}
.page-about .about-connect__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  text-align: center;
  padding: 0 12px;
}
.page-about .about-connect__inner h2 {
  color: var(--c-white);
}
.page-about .about-connect__inner p {
  max-width: 560px;
  margin: 0 auto 32px;
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.95rem;
  line-height: 1.7;
}
.page-about .about-connect__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px;
}
.page-about .about-connect .btn-download {
  background: var(--c-gold);
  color: var(--c-black);
  border: 2px solid var(--c-white);
}
.page-about .about-connect .btn--ghost {
  background: transparent;
  color: var(--c-white);
  border: 2px solid var(--c-white);
}

/* ===== 响应式增强 ===== */
@media (min-width: 640px) {
  .page-about .about-honor__stats {
    grid-template-columns: repeat(4, 1fr);
  }
  .page-about .about-mission {
    padding: 48px 40px;
  }
}

@media (min-width: 768px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 42%) 1fr;
    gap: 40px;
  }
  .page-about .about-hero__media {
    margin: 0;
  }
  .page-about .about-ecosystem__grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .page-about .about-milestone {
    grid-template-columns: 88px minmax(0, 1fr);
    gap: 28px;
    padding-bottom: 44px;
  }
  .page-about .about-timeline__list::before {
    left: 44px;
  }
  .page-about .about-milestone__num {
    width: 88px;
    height: 88px;
    font-size: 1.4rem;
  }
  .page-about .about-timeline__list {
    padding-left: 24px;
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 44%) 1fr;
    gap: 56px;
  }
  .page-about .about-hero__content {
    padding-right: 4%;
  }
  .page-about .about-timeline__visual {
    margin-right: 8%;
  }
  .page-about .about-ecosystem__inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-areas:
      "head head"
      "cards cards"
      "void media";
    gap: 0 40px;
  }
  .page-about .about-ecosystem__head {
    grid-area: head;
  }
  .page-about .about-ecosystem__grid {
    grid-area: cards;
  }
  .page-about .about-ecosystem__media {
    grid-area: media;
    margin-right: 18%;
    margin-bottom: 24px;
  }
  .page-about .about-honor {
    padding: 72px 0;
  }
  .page-about .about-connect {
    padding: 64px 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about [data-reveal],
  .page-about .about-milestone__card,
  .page-about .about-eco-card {
    transition: none;
  }
}