.page-about {
  --page-serif: "Noto Serif SC", "Songti SC", "STSong", serif;
  --page-card-bg: #ffffff;
  --page-gold-soft: rgba(233, 196, 106, 0.28);
  background: var(--c-ivory);
  color: var(--c-ink);
  font-family: var(--font-body);
  overflow-x: hidden;
  padding-bottom: 3rem;
}

.page-about [data-reveal] {
  opacity: 1;
  transform: none;
}

.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--page-serif);
}

.page-about .section-label {
  margin-bottom: 0.6rem;
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumbs {
  max-width: var(--container);
  margin: 0 auto;
  padding: 1.25rem 1rem 0;
  font-size: var(--text-small);
  color: var(--c-deep);
}
.page-about .breadcrumbs a {
  color: var(--c-deep);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease;
}
.page-about .breadcrumbs a:hover {
  border-color: var(--c-gold);
}
.page-about .breadcrumbs__sep {
  margin: 0 0.4rem;
  color: var(--c-line);
}
.page-about .breadcrumbs__current {
  font-weight: 600;
}

/* ---------- 品牌故事 ---------- */
.page-about .about-hero {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  max-width: var(--container);
  margin: 1.5rem auto 0;
  padding: 0 1rem;
}
.page-about .about-hero__text {
  position: relative;
  overflow: hidden;
  background: var(--c-deep);
  color: var(--c-ivory);
  border-radius: var(--radius);
  padding: 2rem 1.5rem;
}
.page-about .about-hero__text::after {
  content: "";
  position: absolute;
  width: 220px;
  height: 220px;
  right: -90px;
  bottom: -90px;
  background: linear-gradient(135deg, transparent 48%, rgba(233, 196, 106, 0.55) 50%);
  clip-path: polygon(100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}
.page-about .about-hero h1 {
  margin: 0.6rem 0 0.9rem;
  font-size: var(--text-h1);
  line-height: 1.18;
  color: #ffffff;
  max-width: 18ch;
}
.page-about .about-hero__lead {
  font-family: var(--page-serif);
  font-size: 1.2rem;
  font-weight: 600;
  line-height: 1.7;
  color: var(--c-gold);
  margin-bottom: 1.1rem;
}
.page-about .about-hero__body {
  line-height: 1.85;
  color: rgba(250, 243, 224, 0.9);
  margin-bottom: 0.85rem;
}
.page-about .about-hero__actions {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}
.page-about .about-hero__emblem {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--c-gold);
  border: 1px solid var(--c-deep);
  border-radius: var(--radius);
  padding: 1.25rem;
}
.page-about .about-hero__emblem::before {
  content: "EST. 2016";
  position: absolute;
  top: 0.7rem;
  left: 1rem;
  font-family: var(--font-num);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  color: var(--c-deep);
}
.page-about .about-hero__img {
  display: block;
  width: 100%;
  max-width: 380px;
  height: auto;
  border-radius: var(--radius);
}

/* ---------- 发展里程碑 ---------- */
.page-about .about-milestones {
  max-width: var(--container);
  margin: 4rem auto 0;
  padding: 0 1rem;
}
.page-about .about-milestones__intro {
  color: var(--c-deep);
  opacity: 0.8;
  margin-bottom: 2rem;
}
.page-about .milestone-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}
.page-about .milestone-timeline::before {
  content: "";
  position: absolute;
  left: 15px;
  top: 8px;
  bottom: 8px;
  width: 3px;
  background: linear-gradient(180deg, var(--c-gold), var(--c-green));
  border-radius: 2px;
}
.page-about .milestone-timeline__item {
  position: relative;
  padding-left: 3.75rem;
  margin-bottom: 1.5rem;
}
.page-about .milestone-timeline__mark {
  position: absolute;
  left: 7px;
  top: 8px;
  width: 18px;
  height: 18px;
  background: var(--c-gold);
  border: 4px solid var(--c-ivory);
  border-radius: 50%;
  box-shadow: 0 0 0 3px var(--c-deep), 0 0 0 6px var(--page-gold-soft);
}
.page-about .milestone-timeline__card {
  position: relative;
  background: var(--page-card-bg);
  border: 1px solid var(--c-line);
  border-left: 4px solid var(--c-deep);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 1.1rem 1.25rem 1.25rem;
}
.page-about .milestone-timeline__card::after {
  content: "";
  position: absolute;
  right: -1px;
  bottom: -1px;
  width: 24px;
  height: 24px;
  background: linear-gradient(135deg, transparent 46%, var(--c-line) 50%, var(--c-line) 100%);
}
.page-about .milestone-timeline__year {
  display: inline-block;
  font-family: var(--font-num);
  font-size: 2rem;
  font-weight: 700;
  line-height: 1;
  color: var(--c-deep);
  letter-spacing: 0.03em;
  margin-right: 0.5rem;
  vertical-align: middle;
}
.page-about .milestone-timeline__card .tag {
  vertical-align: middle;
  margin-left: 0.35rem;
}
.page-about .milestone-timeline__card h3 {
  margin: 0.5rem 0 0.4rem;
  font-size: var(--text-h3);
  color: var(--c-ink);
}
.page-about .milestone-timeline__card p {
  margin: 0;
  font-size: var(--text-small);
  line-height: 1.7;
  color: var(--c-ink);
}

/* ---------- 团队与能力 ---------- */
.page-about .about-team {
  max-width: var(--container);
  margin: 4rem auto 0;
  padding: 0 1rem;
}
.page-about .about-team__intro {
  color: var(--c-deep);
  opacity: 0.8;
  margin-bottom: 1.5rem;
}
.page-about .about-team__tabs {
  background: var(--page-card-bg);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  padding: 1.25rem 1rem;
  box-shadow: 0 8px 24px rgba(11, 61, 46, 0.06);
}
.page-about .about-team__tabs .tabs__nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  border-bottom: 1px solid var(--c-line);
  padding-bottom: 0.75rem;
  margin-bottom: 1.25rem;
}
.page-about .about-team__tabs .tab-btn {
  background: transparent;
  border: 1px solid transparent;
  border-bottom: 3px solid transparent;
  border-radius: 2px 2px 0 0;
  padding: 0.55rem 0.9rem;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--c-deep);
  cursor: pointer;
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}
.page-about .about-team__tabs .tab-btn[aria-selected="true"] {
  color: var(--c-deep);
  border-bottom-color: var(--c-gold);
  background: rgba(233, 196, 106, 0.12);
}
.page-about .about-team__tabs .tabs__panel {
  padding: 0.15rem 0.1rem 0.4rem;
}
.page-about .about-team__tabs .tabs__panel h3 {
  font-size: var(--text-h3);
  margin: 0 0 0.6rem;
}
.page-about .about-team__tabs .tabs__panel p {
  line-height: 1.8;
  margin: 0;
}
.page-about .about-team__tabs .tabs__panel a {
  color: var(--c-deep);
  font-weight: 600;
  text-decoration-thickness: 2px;
  text-decoration-color: var(--c-gold);
  text-underline-offset: 3px;
}
.page-about .about-team__stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  margin-top: 1.75rem;
  background: var(--c-line);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  overflow: hidden;
}
.page-about .about-team__stat {
  background: var(--c-deep);
  color: var(--c-ivory);
  text-align: center;
  padding: 1.25rem 0.75rem;
}
.page-about .about-team__stat-num {
  display: block;
  font-family: var(--font-num);
  font-size: 2rem;
  font-weight: 700;
  line-height: 1;
  color: var(--c-gold);
}
.page-about .about-team__stat-label {
  display: block;
  margin-top: 0.5rem;
  font-size: var(--text-small);
  color: rgba(250, 243, 224, 0.82);
}
.page-about .about-team__photo {
  margin-top: 1.75rem;
}
.page-about .about-team__photo img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 480px;
  object-fit: cover;
  border: 8px solid #fff;
  border-radius: var(--radius);
  box-shadow: 0 14px 30px rgba(11, 61, 46, 0.18);
}

/* ---------- 资质与认证 ---------- */
.page-about .about-credentials {
  width: 100%;
  margin-top: 4rem;
  padding: 3rem 1rem;
  background: var(--c-deep);
  color: var(--c-ivory);
  position: relative;
  overflow: hidden;
}
.page-about .about-credentials::before {
  content: "";
  position: absolute;
  top: -60px;
  right: -60px;
  width: 240px;
  height: 240px;
  background: linear-gradient(135deg, transparent 47%, rgba(233, 196, 106, 0.28) 50%);
  clip-path: polygon(100% 0, 100% 100%, 0 100%);
}
.page-about .about-credentials__inner {
  max-width: var(--container);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  position: relative;
  z-index: 1;
}
.page-about .about-credentials .section-label--gold {
  color: var(--c-gold);
}
.page-about .about-credentials h2 {
  color: #ffffff;
  font-size: var(--text-h2);
  margin: 0.3rem 0 0.8rem;
}
.page-about .about-credentials__intro {
  color: rgba(250, 243, 224, 0.85);
  line-height: 1.8;
  margin-bottom: 1.2rem;
  max-width: 62ch;
}
.page-about .about-credentials__cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}
.page-about .credential-card {
  background: rgba(250, 243, 224, 0.06);
  border: 1px solid rgba(233, 196, 106, 0.4);
  border-radius: var(--radius);
  padding: 1.25rem 1.35rem;
}
.page-about .credential-card__code {
  display: block;
  font-family: var(--font-num);
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--c-gold);
  margin-bottom: 0.45rem;
}
.page-about .credential-card h3 {
  color: #ffffff;
  font-size: 1.05rem;
  margin: 0 0 0.5rem;
}
.page-about .credential-card p {
  color: rgba(250, 243, 224, 0.82);
  font-size: var(--text-small);
  line-height: 1.7;
  margin: 0;
}
.page-about .about-credentials__media img {
  display: block;
  width: 100%;
  max-width: 600px;
  height: auto;
  margin: 0 auto;
  border: 1px solid rgba(233, 196, 106, 0.5);
  border-radius: var(--radius);
  box-shadow: 0 14px 34px rgba(0, 0, 0, 0.28);
}

/* ---------- 合作与荣誉 ---------- */
.page-about .about-honors {
  max-width: var(--container);
  margin: 4rem auto 0;
  padding: 0 1rem;
}
.page-about .about-honors__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  margin-top: 2rem;
}
.page-about .honor-card {
  background: var(--page-card-bg);
  border: 1px solid var(--c-line);
  border-top: 4px solid var(--c-gold);
  border-radius: var(--radius);
  padding: 1.5rem 1.4rem 1.6rem;
}
.page-about .honor-card__num {
  display: block;
  font-family: var(--font-num);
  font-size: 2.6rem;
  font-weight: 700;
  line-height: 1;
  color: var(--c-deep);
  letter-spacing: 0.02em;
}
.page-about .honor-card h3 {
  margin: 0.85rem 0 0.5rem;
  font-size: 1.15rem;
}
.page-about .honor-card p {
  color: var(--c-ink);
  font-size: var(--text-small);
  line-height: 1.7;
  margin: 0;
}
.page-about .about-honors__cta {
  margin-top: 2.5rem;
  padding: 2.4rem 1.5rem;
  text-align: center;
  background: linear-gradient(135deg, var(--c-green), var(--c-deep));
  border-radius: var(--radius);
  color: var(--c-ivory);
}
.page-about .about-honors__cta p {
  margin: 0 0 1.2rem;
  color: rgba(250, 243, 224, 0.92);
  font-size: 1.05rem;
}
.page-about .about-honors__links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
}

/* ---------- 页面通用按钮 ---------- */
.page-about .about-cta-btn {
  display: inline-block;
  padding: 0.72rem 1.5rem;
  border: 1px solid var(--c-gold);
  border-radius: 2px;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--c-gold);
  text-decoration: none;
  background: transparent;
  transition: background 0.2s ease, color 0.2s ease;
}
.page-about .about-cta-btn:hover {
  background: var(--c-gold);
  color: var(--c-deep);
}

/* ---------- 平板及以上 ---------- */
@media (min-width: 640px) {
  .page-about .about-team__stats {
    grid-template-columns: repeat(4, 1fr);
  }
  .page-about .about-credentials__cards {
    grid-template-columns: 1fr 1fr;
  }
  .page-about .about-honors__grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .page-about .milestone-timeline {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    margin-top: 2rem;
  }
  .page-about .milestone-timeline::before {
    left: 0;
    right: 0;
    top: 18px;
    bottom: auto;
    width: auto;
    height: 3px;
    background: linear-gradient(90deg, var(--c-gold), var(--c-green), var(--c-gold));
  }
  .page-about .milestone-timeline__item {
    padding-left: 0;
    padding-top: 3rem;
    margin-bottom: 0;
  }
  .page-about .milestone-timeline__mark {
    left: 0;
    top: 10px;
  }
  .page-about .milestone-timeline__card {
    border-left: 1px solid var(--c-line);
    border-top: 4px solid var(--c-gold);
    border-radius: var(--radius) var(--radius) 0 0;
    height: 100%;
  }
  .page-about .milestone-timeline__item:nth-child(odd) .milestone-timeline__card {
    border-top-color: var(--c-green);
  }
  .page-about .milestone-timeline__item:nth-child(even) .milestone-timeline__card {
    border-top-color: var(--c-gold);
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 880px) {
  .page-about .about-hero {
    grid-template-columns: 1.15fr 0.85fr;
    align-items: center;
    gap: 1rem;
    margin-top: 2rem;
  }
  .page-about .about-hero__text {
    padding: 3rem 3rem 3.2rem;
  }
  .page-about .about-hero__emblem {
    padding: 1.5rem;
    margin-right: 1.5rem;
  }
  .page-about .about-milestones {
    margin-top: 5rem;
  }
  .page-about .milestone-timeline {
    grid-template-columns: repeat(4, 1fr);
  }
  .page-about .about-team {
    margin-top: 5rem;
  }
  .page-about .about-team__tabs {
    padding: 1.75rem 1.5rem;
  }
  .page-about .about-credentials {
    margin-top: 5rem;
    padding: 4rem 1rem;
  }
  .page-about .about-credentials__inner {
    grid-template-columns: 1fr 0.9fr;
    align-items: center;
    gap: 2.5rem;
  }
  .page-about .about-credentials__media img {
    margin: 0;
  }
  .page-about .about-honors {
    margin-top: 5rem;
  }
}