.page-about {
  background: var(--color-bg);
  color: var(--color-text);
}

/* 区块通用节奏 */
.page-about .about-section {
  padding: clamp(3.5rem, 7vw, 6.5rem) 0;
}

/* ---- 首屏 ---- */
.page-about .about-hero {
  padding: clamp(2rem, 5vw, 4rem) 0 0;
}

.page-about .about-hero-inner {
  padding-top: 1rem;
}

.page-about .about-hero-layout {
  display: grid;
  gap: 2.5rem;
  padding-top: clamp(2rem, 5vw, 4.5rem);
  padding-bottom: clamp(2.5rem, 6vw, 5rem);
}

.page-about .about-hero-kicker {
  color: var(--color-accent);
  font-size: 0.85rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  margin-bottom: 1.25rem;
}

.page-about .about-hero-copy h1 {
  font-size: clamp(2.25rem, 5.6vw, 4.5rem);
  line-height: 1.06;
  letter-spacing: -0.03em;
  margin: 0 0 1.5rem;
  color: var(--color-text);
}

.page-about .about-hero-lead {
  color: var(--color-text-secondary);
  font-size: 1rem;
  line-height: 1.85;
  max-width: 44rem;
  margin: 0 0 2rem;
}

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

/* 首屏数据面板 */
.page-about .about-hero-panel {
  position: relative;
  border: 1px solid var(--color-border);
  background: linear-gradient(140deg, rgba(74, 0, 224, 0.18), rgba(142, 45, 226, 0.05)), var(--color-bg-card);
  padding: 3rem 1.75rem 1.75rem;
}

.page-about .about-hero-panel::before {
  content: "CORE METRICS";
  position: absolute;
  top: 1.25rem;
  left: 1.5rem;
  right: 1.5rem;
  color: var(--color-accent);
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 0.75rem;
}

.page-about .about-stat-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--color-border);
  border: 1px solid var(--color-border);
}

.page-about .about-stat-list li {
  background: var(--color-bg);
  padding: 1.35rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.page-about .about-stat-value {
  color: var(--color-accent);
  font-size: 2rem;
  line-height: 1.1;
  font-weight: 700;
}

.page-about .about-stat-label {
  color: var(--color-text-secondary);
  font-size: 0.8rem;
  line-height: 1.4;
}

/* ---- 我们的使命 ---- */
.page-about .about-mission-layout {
  display: grid;
  gap: 2.5rem;
}

.page-about .about-mission-titlecol {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1rem;
}

.page-about .about-mission-note {
  color: var(--color-text-secondary);
  margin: 0;
}

.page-about .about-mission-quote {
  font-size: clamp(1.25rem, 2.6vw, 2rem);
  line-height: 1.6;
  color: var(--color-text);
  border-left: 3px solid var(--color-accent);
  padding-left: 1.25rem;
  margin: 0 0 2rem;
}

.page-about .about-mission-list {
  display: grid;
  gap: 1rem;
}

.page-about .about-mission-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  padding: 1.5rem;
  transition: border-color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base);
}

.page-about .about-mission-card:hover {
  border-color: rgba(255, 215, 0, 0.45);
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.28);
  transform: translateY(-3px);
}

.page-about .about-mission-num {
  display: inline-block;
  color: var(--color-accent);
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  font-weight: 700;
}

.page-about .about-mission-card h3 {
  font-size: 1.05rem;
  margin: 0.5rem 0 0.6rem;
  color: var(--color-text);
}

.page-about .about-mission-card p {
  color: var(--color-text-secondary);
  font-size: 0.92rem;
  line-height: 1.75;
  margin: 0;
}

/* ---- 发展历程 ---- */
.page-about .about-history {
  padding-top: clamp(1rem, 2vw, 2rem);
}

.page-about .about-history-head {
  display: grid;
  gap: 1rem;
  margin-bottom: 2.5rem;
}

.page-about .about-history-desc {
  margin: 0;
  color: var(--color-text-secondary);
  max-width: 32rem;
}

.page-about .about-timeline-top {
  display: grid;
  gap: 2rem;
  margin-bottom: 3.5rem;
}

.page-about .about-timeline-eyebrow {
  color: var(--color-accent);
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  margin: 0 0 0.75rem;
}

.page-about .about-timeline-summary-text {
  color: var(--color-text-secondary);
  line-height: 1.85;
  margin: 0;
}

.page-about .about-timeline-cover {
  border: 1px solid var(--color-border);
  background: var(--color-bg-card);
  padding: 0.5rem;
}

.page-about .about-timeline-img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .about-timeline {
  list-style: none;
  margin: 0 0 2.5rem;
  padding: 0;
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 0;
  bottom: 0;
  width: 1px;
  background: linear-gradient(to bottom, var(--color-gradient-from), var(--color-gradient-to), var(--color-accent));
}

.page-about .about-timeline-item {
  position: relative;
  padding: 0 0 2rem 2.5rem;
}

.page-about .about-timeline-item:last-child {
  padding-bottom: 0;
}

.page-about .about-timeline-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.35rem;
  width: 15px;
  height: 15px;
  background: var(--color-bg);
  border: 2px solid var(--color-accent);
  transform: rotate(45deg);
  transition: background var(--transition-fast);
}

.page-about .about-timeline-item:hover::before {
  background: var(--color-accent);
}

.page-about .about-timeline-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  padding: 1.5rem;
  transition: border-color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base);
}

.page-about .about-timeline-card:hover,
.page-about .about-timeline-card:focus-within {
  border-color: rgba(255, 215, 0, 0.4);
  box-shadow: 0 14px 34px rgba(0, 0, 0, 0.3);
  transform: translateY(-2px);
}

.page-about .about-timeline-year {
  display: inline-block;
  color: var(--color-accent);
  font-size: 0.8rem;
  letter-spacing: 0.14em;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.page-about .about-timeline-card h3 {
  font-size: 1.05rem;
  margin: 0 0 0.6rem;
}

.page-about .about-timeline-card p {
  color: var(--color-text-secondary);
  font-size: 0.92rem;
  line-height: 1.7;
  margin: 0;
}

.page-about .about-timeline-card .about-timeline-extended {
  max-height: 0;
  overflow: hidden;
  color: var(--color-text-secondary);
  font-size: 0.85rem;
  margin: 0;
  padding: 0;
  border-top: 0 solid transparent;
  transition: max-height var(--transition-base), margin-top var(--transition-base), padding-top var(--transition-base);
}

.page-about .about-timeline-card:hover .about-timeline-extended,
.page-about .about-timeline-card:focus-within .about-timeline-extended {
  max-height: 12rem;
  margin-top: 0.75rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--color-border);
}

.page-about .about-history-cta {
  display: flex;
  justify-content: center;
  margin-top: 1.5rem;
}

/* ---- 会员中心服务介绍 ---- */
.page-about .about-services {
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  background: radial-gradient(ellipse at 85% 20%, rgba(74, 0, 224, 0.1), transparent 60%), var(--color-bg);
}

.page-about .about-services-head {
  display: grid;
  gap: 1.5rem;
  margin-bottom: 2.5rem;
}

.page-about .about-services-titlecol {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1rem;
}

.page-about .about-services-desc {
  color: var(--color-text-secondary);
  line-height: 1.8;
  max-width: 36rem;
  margin: 0;
}

.page-about .about-services-scroll {
  display: flex;
  gap: 1rem;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  margin-left: calc(-1 * var(--container-padding));
  margin-right: calc(-1 * var(--container-padding));
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
  padding-bottom: 1rem;
  margin-bottom: 2rem;
  scrollbar-width: thin;
  scrollbar-color: var(--color-accent) var(--color-border);
}

.page-about .about-services-scroll::-webkit-scrollbar {
  height: 4px;
}

.page-about .about-services-scroll::-webkit-scrollbar-track {
  background: var(--color-border);
}

.page-about .about-services-scroll::-webkit-scrollbar-thumb {
  background: var(--color-accent);
}

.page-about .about-service-card {
  flex: 0 0 min(84%, 22rem);
  scroll-snap-align: start;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-top: 2px solid var(--color-gradient-from);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transition: border-color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base);
}

.page-about .about-service-card:hover {
  border-top-color: var(--color-accent);
  box-shadow: 0 14px 34px rgba(0, 0, 0, 0.3);
  transform: translateY(-4px);
}

.page-about .about-service-tag {
  color: var(--color-accent);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-weight: 700;
}

.page-about .about-service-card h3 {
  font-size: 1.15rem;
  margin: 0;
  color: var(--color-text);
}

.page-about .about-service-card p {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  line-height: 1.75;
  margin: 0;
  flex: 1 1 auto;
}

.page-about .about-service-link {
  color: var(--color-accent);
  font-size: 0.88rem;
  font-weight: 600;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.25rem;
}

.page-about .about-service-link::after {
  content: "→";
  transition: transform var(--transition-fast);
}

.page-about .about-service-link:hover {
  text-decoration: underline;
}

.page-about .about-service-link:hover::after {
  transform: translateX(4px);
}

.page-about .about-services-bottom {
  display: grid;
  gap: 1.5rem;
  align-items: center;
}

.page-about .about-services-figure {
  max-width: 300px;
  margin: 0;
  border: 1px solid var(--color-border);
  background: var(--color-bg-card);
  padding: 0.75rem;
}

.page-about .about-services-img {
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  display: block;
}

.page-about .about-services-figure figcaption {
  padding-top: 0.75rem;
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  text-align: center;
}

.page-about .about-services-note {
  color: var(--color-text-secondary);
  line-height: 1.85;
  margin: 0;
  font-size: 0.95rem;
  border-left: 2px solid var(--color-accent);
  padding-left: 1.25rem;
}

/* ---- 资质与认证 ---- */
.page-about .about-qualifications-layout {
  display: grid;
  gap: 2.5rem;
}

.page-about .about-qualifications-copy {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1rem;
}

.page-about .about-qualifications-desc {
  color: var(--color-text-secondary);
  line-height: 1.85;
  max-width: 36rem;
  margin: 0 0 1rem;
}

.page-about .about-qualification-list {
  list-style: none;
  margin: 0;
  padding: 0;
  width: 100%;
}

.page-about .about-qualification-item {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.25rem 1rem;
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--color-border);
}

.page-about .about-qualification-item:first-child {
  border-top: 1px solid var(--color-border);
}

.page-about .about-qualification-name {
  color: var(--color-text);
  font-weight: 600;
  font-size: 0.98rem;
}

.page-about .about-qualification-detail {
  color: var(--color-accent);
  font-size: 0.88rem;
  text-align: right;
}

.page-about .about-qualifications-visual {
  border: 1px solid var(--color-border);
  background: var(--color-bg-card);
  padding: 0.75rem;
}

.page-about .about-qualifications-img {
  width: 100%;
  height: auto;
  aspect-ratio: 5 / 3;
  object-fit: cover;
  display: block;
}

.page-about .about-qualifications-footnote {
  margin: 0.75rem 0 0;
  color: var(--color-text-secondary);
  font-size: 0.8rem;
  text-align: center;
}

/* ---- 合作生态 ---- */
.page-about .about-ecosystem-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
  margin-bottom: 2.5rem;
}

.page-about .about-ecosystem-grid {
  display: grid;
  gap: 1.25rem;
}

.page-about .about-eco-card {
  background: linear-gradient(135deg, rgba(74, 0, 224, 0.08), transparent 60%), var(--color-bg-card);
  border: 1px solid var(--color-border);
  padding: 1.75rem;
  transition: border-color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base);
}

.page-about .about-eco-card:hover {
  border-color: rgba(255, 215, 0, 0.5);
  transform: translateY(-3px);
  box-shadow: 0 10px 26px rgba(0, 0, 0, 0.25);
}

.page-about .about-eco-num {
  color: var(--color-accent);
  font-size: 0.8rem;
  letter-spacing: 0.12em;
}

.page-about .about-eco-card h3 {
  font-size: 1.08rem;
  margin: 0.5rem 0 0.75rem;
}

.page-about .about-eco-card p {
  color: var(--color-text-secondary);
  font-size: 0.92rem;
  line-height: 1.75;
  margin: 0;
}

.page-about .about-ecosystem-footer {
  margin: 2.5rem 0 0;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  text-align: center;
}

.page-about .about-ecosystem-footer a {
  color: var(--color-accent);
  text-decoration: none;
}

.page-about .about-ecosystem-footer a:hover {
  text-decoration: underline;
}

/* ---- 响应式增强 ---- */
@media (min-width: 700px) {
  .page-about .about-ecosystem-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
  }
}

@media (min-width: 760px) {
  .page-about .about-hero-layout {
    grid-template-columns: 1.35fr 0.65fr;
    gap: 3rem;
    align-items: center;
  }
}

@media (min-width: 768px) {
  .page-about .about-services-scroll {
    margin-left: 0;
    margin-right: 0;
    padding-left: 0;
    padding-right: 0.5rem;
  }

  .page-about .about-services-head {
    grid-template-columns: 1fr 1fr;
    align-items: end;
    gap: 3rem;
  }

  .page-about .about-services-bottom {
    grid-template-columns: auto 1fr;
    gap: 2rem;
  }
}

@media (min-width: 900px) {
  .page-about .about-mission-layout {
    grid-template-columns: minmax(200px, 1fr) 2.2fr;
    gap: 4rem;
  }

  .page-about .about-mission-list {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
  }
}

@media (min-width: 960px) {
  .page-about .about-qualifications-layout {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 4rem;
    align-items: center;
  }
}

@media (min-width: 1024px) {
  .page-about .about-history-head {
    grid-template-columns: auto 1fr;
    gap: 3rem;
    align-items: baseline;
  }

  .page-about .about-timeline-top {
    grid-template-columns: 1.2fr 1fr;
    align-items: center;
    gap: 3rem;
  }

  .page-about .about-timeline::before {
    left: 50%;
  }

  .page-about .about-timeline-item {
    width: 50%;
    padding: 0 0 2.5rem;
  }

  .page-about .about-timeline-item:nth-child(odd) {
    margin-right: 0;
    padding-right: 3.5rem;
    text-align: right;
  }

  .page-about .about-timeline-item:nth-child(even) {
    margin-left: 50%;
    padding-left: 3.5rem;
    text-align: left;
  }

  .page-about .about-timeline-item::before {
    left: auto;
    right: -7.5px;
  }

  .page-about .about-timeline-item:nth-child(even)::before {
    right: auto;
    left: -7.5px;
  }
}

@media (min-width: 1200px) {
  .page-about .about-hero-layout {
    gap: 4rem;
  }

  .page-about .about-services-bottom {
    grid-template-columns: minmax(260px, 320px) 1fr;
    gap: 2.5rem;
  }
}