.page-about {
  background: var(--color-off-white);
  color: var(--color-ink);
}

/* ===== 首屏 Hero ===== */
.page-about .about-hero {
  position: relative;
  background: var(--color-primary);
  color: #FFFFFF;
  overflow: hidden;
  padding: 36px 0 0;
}

.page-about .about-hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.page-about .about-hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 40%;
  opacity: 0.28;
  max-width: none;
}

.page-about .about-hero-overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(115deg, rgba(10, 30, 63, 0.97) 0%, rgba(10, 30, 63, 0.84) 48%, rgba(10, 30, 63, 0.52) 100%),
    repeating-linear-gradient(135deg, transparent 0 14px, rgba(122, 156, 198, 0.06) 14px 15px);
}

.page-about .about-hero .container {
  position: relative;
  z-index: 1;
}

.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 32px;
}

.page-about .breadcrumb a {
  color: rgba(255, 255, 255, 0.82);
  text-decoration: none;
  transition: color 0.2s ease;
}

.page-about .breadcrumb a:hover {
  color: var(--color-accent);
}

.page-about .breadcrumb [aria-current="page"] {
  color: var(--color-accent);
}

.page-about .about-eyebrow {
  margin: 0 0 16px;
}

.page-about .about-hero .tag {
  background: rgba(57, 255, 136, 0.14);
  border: 1px solid rgba(57, 255, 136, 0.4);
  color: var(--color-accent);
  font-weight: 700;
}

.page-about .about-title {
  font-family: var(--font-headline);
  font-size: clamp(2.25rem, 7vw, 4rem);
  font-weight: 800;
  line-height: 1.02;
  letter-spacing: -0.02em;
  margin: 0 0 12px;
  max-width: 13em;
}

.page-about .about-subtitle {
  font-family: var(--font-headline);
  font-size: clamp(1.125rem, 3vw, 1.5rem);
  font-weight: 600;
  color: rgba(255, 255, 255, 0.72);
  margin: 0 0 18px;
}

.page-about .about-lead {
  max-width: 640px;
  font-size: 1.0625rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.86);
  margin: 0;
}

.page-about .about-hero-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 14px;
  overflow: hidden;
  margin-top: 36px;
  background: rgba(8, 23, 48, 0.5);
}

.page-about .about-hero-stats .stat {
  padding: 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  border-left: 1px solid rgba(255, 255, 255, 0.1);
}

.page-about .about-hero-stats .stat:nth-child(-n+2) {
  border-top: 0;
}

.page-about .about-hero-stats .stat:nth-child(odd) {
  border-left: 0;
}

.page-about .about-hero-stats .stat-value {
  display: block;
  font-family: var(--font-number);
  font-size: 1.625rem;
  font-weight: 700;
  line-height: 1.1;
  color: var(--color-accent);
}

.page-about .about-hero-stats .stat-label {
  display: block;
  margin-top: 6px;
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.62);
}

.page-about .about-hero-curve {
  display: block;
  width: 100%;
  height: 60px;
  margin-top: 44px;
  vertical-align: bottom;
}

/* ===== 章节通用头部 ===== */
.page-about .section-kicker {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-accent-orange);
  margin: 0 0 10px;
}

.page-about .section-title {
  font-family: var(--font-headline);
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  line-height: 1.05;
  margin: 0 0 14px;
}

.page-about .section-intro {
  margin: 12px 0 0;
  color: #5B6B82;
  font-size: 1rem;
  line-height: 1.65;
  max-width: 640px;
}

.page-about .about-section-head {
  max-width: 760px;
  margin-bottom: 36px;
}

/* ===== 品牌起源 ===== */
.page-about .about-story {
  background: var(--color-off-white);
  padding: 64px 0;
}

.page-about .about-story-grid {
  display: grid;
  gap: 36px;
}

.page-about .about-story-main .section-title {
  margin-bottom: 22px;
}

.page-about .about-story-paragraph {
  margin: 0 0 16px;
  line-height: 1.75;
  color: #3A4659;
}

.page-about .about-story-side {
  align-self: center;
}

.page-about .about-story-card {
  position: relative;
  background: #FFFFFF;
  padding: 24px;
  overflow: hidden;
}

.page-about .about-story-card::after {
  content: "";
  position: absolute;
  right: -30px;
  bottom: -30px;
  width: 90px;
  height: 90px;
  border-radius: 24px;
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-orange));
  opacity: 0.12;
  transform: rotate(12deg);
}

.page-about .about-story-card-index {
  position: absolute;
  top: 10px;
  right: 16px;
  font-family: var(--font-number);
  font-size: 3rem;
  font-weight: 800;
  line-height: 1;
  color: var(--color-accent-orange);
  opacity: 0.22;
}

.page-about .about-story-card h3 {
  position: relative;
  margin: 0 0 6px;
  font-size: 1.125rem;
  z-index: 1;
}

.page-about .about-tag-list {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  position: relative;
  z-index: 1;
}

/* ===== 时间轴 / 里程碑 ===== */
.page-about .about-milestones {
  background: #FFFFFF;
  padding: 72px 0;
}

.page-about .about-milestones .container {
  max-width: 1080px;
}

.page-about .about-timeline {
  position: relative;
  max-width: 920px;
  margin: 0;
}

.page-about .timeline-rail {
  display: none;
}

.page-about .timeline-item {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 28px 1fr;
  column-gap: 16px;
  row-gap: 8px;
  padding-bottom: 32px;
}

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

.page-about .timeline-dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 0 5px rgba(57, 255, 136, 0.16);
  grid-column: 1;
  grid-row: 1;
  justify-self: center;
  margin-top: 8px;
}

.page-about .timeline-year {
  grid-column: 2;
  grid-row: 1;
  font-family: var(--font-number);
  font-weight: 700;
  font-size: 1rem;
  color: var(--color-accent-orange);
  line-height: 1.4;
}

.page-about .timeline-card {
  grid-column: 2;
  background: var(--color-off-white);
  border-radius: 12px;
  border-left: 4px solid var(--color-accent);
  padding: 20px 22px;
  box-shadow: var(--shadow-card);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.page-about .timeline-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lift);
}

.page-about .timeline-card h3 {
  font-size: 1.125rem;
  margin: 0 0 8px;
  line-height: 1.3;
}

.page-about .timeline-card p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.65;
  color: #4A5568;
}

.page-about .timeline-card-list {
  margin: 12px 0 0;
  padding-left: 20px;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: #4A5568;
}

.page-about .timeline-item:nth-child(1) .timeline-dot {
  background: #39FF88;
  box-shadow: 0 0 0 5px rgba(57, 255, 136, 0.18);
}

.page-about .timeline-item:nth-child(2) .timeline-dot {
  background: #A4F07D;
  box-shadow: 0 0 0 5px rgba(164, 240, 125, 0.18);
}

.page-about .timeline-item:nth-child(3) .timeline-dot {
  background: #FFB347;
  box-shadow: 0 0 0 5px rgba(255, 179, 71, 0.18);
}

.page-about .timeline-item:nth-child(4) .timeline-dot {
  background: #FF7A29;
  box-shadow: 0 0 0 5px rgba(255, 122, 41, 0.18);
}

.page-about .timeline-item:nth-child(1) .timeline-year {
  color: #39FF88;
}

.page-about .timeline-item:nth-child(2) .timeline-year {
  color: #8BCF6D;
}

.page-about .timeline-item:nth-child(3) .timeline-year {
  color: #FFB347;
}

.page-about .timeline-item:nth-child(4) .timeline-year {
  color: #FF7A29;
}

.page-about .timeline-item:nth-child(1) .timeline-card {
  border-left-color: #39FF88;
}

.page-about .timeline-item:nth-child(2) .timeline-card {
  border-left-color: #A4F07D;
}

.page-about .timeline-item:nth-child(3) .timeline-card {
  border-left-color: #FFB347;
}

.page-about .timeline-item:nth-child(4) .timeline-card {
  border-left-color: #FF7A29;
}

.page-about .about-milestones-foot {
  margin-top: 44px;
  text-align: center;
}

/* ===== 数据与服务能力 ===== */
.page-about .about-capability {
  background: var(--color-deep-black);
  color: #FFFFFF;
  padding: 72px 0;
}

.page-about .about-capability .section-title {
  color: #FFFFFF;
}

.page-about .about-capability .section-intro {
  color: rgba(255, 255, 255, 0.62);
}

.page-about .about-capability .section-kicker {
  color: var(--color-accent);
}

.page-about .about-cap-grid {
  display: grid;
  gap: 28px;
}

.page-about .about-cap-cards {
  display: grid;
  gap: 16px;
}

.page-about .cap-card {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--color-slate);
  border-radius: 16px;
  padding: 24px;
  position: relative;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.page-about .cap-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-3px);
}

.page-about .cap-card-index {
  display: inline-block;
  font-family: var(--font-number);
  font-weight: 800;
  font-size: 1.125rem;
  letter-spacing: 0.04em;
  color: var(--color-accent-orange);
  margin-bottom: 10px;
}

.page-about .cap-card h3 {
  margin: 0 0 10px;
  font-size: 1.1875rem;
}

.page-about .cap-card p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.65;
  color: rgba(255, 255, 255, 0.68);
}

.page-about .cap-data {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.page-about .cap-data .stat-num {
  font-family: var(--font-number);
  font-size: 2.5rem;
  font-weight: 700;
  line-height: 1;
  color: var(--color-accent);
}

.page-about .cap-data-label {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.58);
}

.page-about .cap-note {
  margin: 8px 0 0;
  padding-left: 14px;
  border-left: 3px solid var(--color-accent-orange);
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.62);
  line-height: 1.6;
}

.page-about .about-cap-image {
  aspect-ratio: 4 / 3;
}

.page-about .about-cap-figure img {
  border-radius: 16px;
  border: 1px solid var(--color-slate);
}

.page-about .about-capability .image-caption {
  color: rgba(255, 255, 255, 0.6);
}

/* ===== 资质与认证 ===== */
.page-about .about-credentials {
  background: var(--color-off-white);
  padding: 72px 0;
}

.page-about .about-cred-grid {
  display: grid;
  gap: 16px;
  max-width: 860px;
}

.page-about .cred-card {
  background: #FFFFFF;
  border: 1px solid var(--color-border);
  border-radius: 14px;
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
}

.page-about .cred-card:hover {
  box-shadow: var(--shadow-lift);
  border-color: #A0B4D8;
}

.page-about .cred-card summary {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 20px;
  cursor: pointer;
  font-weight: 700;
  font-size: 1.0625rem;
  line-height: 1.4;
}

.page-about .cred-card summary::-webkit-details-marker {
  display: none;
}

.page-about .cred-card-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  flex: 0 0 44px;
  border-radius: 10px;
  font-family: var(--font-number);
  font-weight: 800;
  font-size: 0.9375rem;
  color: var(--color-primary);
  background: rgba(57, 255, 136, 0.14);
  border: 1px solid rgba(57, 255, 136, 0.32);
}

.page-about .cred-card-more {
  position: relative;
  margin-left: auto;
  width: 16px;
  height: 16px;
  flex: 0 0 16px;
  transform: rotate(45deg);
  transition: transform 0.25s ease;
}

.page-about .cred-card-more::before,
.page-about .cred-card-more::after {
  content: "";
  position: absolute;
  background: var(--color-accent-orange);
  border-radius: 2px;
}

.page-about .cred-card-more::before {
  left: 7px;
  top: 0;
  width: 2px;
  height: 16px;
}

.page-about .cred-card-more::after {
  left: 0;
  top: 7px;
  width: 16px;
  height: 2px;
}

.page-about .cred-card[open] .cred-card-more {
  transform: rotate(225deg);
}

.page-about .cred-card .details-content {
  padding: 16px 20px 22px 78px;
  color: #5B6B82;
  font-size: 0.9375rem;
  line-height: 1.7;
  border-top: 1px dashed var(--color-border);
}

.page-about .about-credentials-note {
  max-width: 860px;
  margin-top: 24px;
  padding: 16px 18px;
  background: rgba(255, 122, 41, 0.07);
  border-left: 3px solid var(--color-accent-orange);
  border-radius: 0 10px 10px 0;
  font-size: 0.9375rem;
  line-height: 1.6;
  color: #40506A;
}

/* ===== 团队组成 ===== */
.page-about .about-team {
  background: #FFFFFF;
  padding: 72px 0;
}

.page-about .about-team-grid {
  display: grid;
  gap: 28px;
  align-items: center;
}

.page-about .about-team-copy .section-title {
  margin-bottom: 16px;
}

.page-about .about-team-lead {
  font-size: 1.0625rem;
  line-height: 1.7;
  color: #3A4659;
  margin: 0 0 16px;
}

.page-about .about-team-note {
  font-size: 0.9375rem;
  color: #5B6B82;
  line-height: 1.65;
  margin: 0;
  border-left: 3px solid var(--color-accent);
  padding-left: 14px;
}

.page-about .about-team-bars {
  background: var(--color-off-white);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  padding: 28px;
  display: grid;
  gap: 26px;
}

.page-about .team-bar-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 10px;
}

.page-about .team-bar-name {
  font-weight: 700;
  font-size: 1rem;
}

.page-about .team-bar-value {
  font-family: var(--font-number);
  font-weight: 700;
  font-size: 1.375rem;
  color: var(--color-accent-orange);
}

.page-about .team-bar:nth-child(2) .team-bar-value {
  color: var(--color-accent);
}

.page-about .team-bar-track {
  height: 10px;
  background: #D9E2F0;
  border-radius: 999px;
  overflow: hidden;
}

.page-about .team-bar-fill {
  display: block;
  width: var(--fill, 50%);
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-accent-orange));
  transform-origin: left center;
  animation: about-grow-bar 1s ease-out 0.15s both;
}

.page-about .team-bar:nth-child(2) .team-bar-fill {
  background: linear-gradient(90deg, var(--color-blue-soft), var(--color-accent));
}

@keyframes about-grow-bar {
  from {
    transform: scaleX(0);
  }
  to {
    transform: scaleX(1);
  }
}

/* ===== 合作生态与荣誉 ===== */
.page-about .about-ecosystem {
  background: linear-gradient(180deg, #F5F7FA 0%, #FFFFFF 70%);
  padding: 72px 0;
}

.page-about .about-eco-grid {
  display: grid;
  gap: 28px;
  align-items: center;
}

.page-about .about-eco-image {
  aspect-ratio: 5 / 3;
}

.page-about .about-eco-figure img {
  border-radius: 16px;
  border: 1px solid var(--color-border);
}

.page-about .about-eco-cards {
  display: grid;
  gap: 16px;
}

.page-about .eco-card {
  background: #FFFFFF;
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-accent-orange);
  border-radius: 8px 14px 14px 8px;
  padding: 20px 22px;
  box-shadow: var(--shadow-card);
}

.page-about .eco-card-index {
  display: block;
  font-family: var(--font-number);
  font-weight: 800;
  font-size: 2rem;
  line-height: 1;
  color: var(--color-accent-orange);
  margin-bottom: 10px;
}

.page-about .eco-card h3 {
  margin: 0 0 8px;
  font-size: 1.0625rem;
}

.page-about .eco-card p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.65;
  color: #4A5568;
}

.page-about .about-eco-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 8px;
}

/* ===== 底部入口 ===== */
.page-about .about-links {
  background: var(--color-primary);
  color: #FFFFFF;
  padding: 64px 0;
}

.page-about .about-links-grid {
  display: grid;
  gap: 16px;
}

.page-about .about-link-card {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 16px;
  padding: 24px 22px;
  color: #FFFFFF;
  text-decoration: none;
  transition: border-color 0.2s ease, background 0.2s ease, transform 0.2s ease;
}

.page-about .about-link-card:hover {
  border-color: var(--color-accent);
  background: rgba(57, 255, 136, 0.08);
  transform: translateY(-3px);
}

.page-about .about-link-card:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

.page-about .about-link-title {
  display: block;
  font-weight: 800;
  font-size: 1.125rem;
  margin-bottom: 8px;
}

.page-about .about-link-desc {
  display: block;
  font-size: 0.9375rem;
  color: rgba(255, 255, 255, 0.65);
  line-height: 1.6;
}

/* ===== 响应式 ===== */
@media (min-width: 768px) {
  .page-about .about-hero {
    padding: 56px 0 0;
  }

  .page-about .about-hero-stats {
    grid-template-columns: repeat(4, 1fr);
    max-width: 920px;
  }

  .page-about .about-hero-stats .stat {
    border-top: 0;
  }

  .page-about .about-hero-stats .stat:nth-child(n+2) {
    border-left: 1px solid rgba(255, 255, 255, 0.1);
  }

  .page-about .about-story-grid {
    grid-template-columns: 1fr 340px;
    gap: 48px;
  }

  .page-about .about-cap-grid {
    grid-template-columns: 1.05fr 0.95fr;
    align-items: center;
    gap: 44px;
  }

  .page-about .about-team-grid {
    grid-template-columns: 1fr 1fr;
    gap: 48px;
  }

  .page-about .about-eco-grid {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 44px;
  }

  .page-about .about-links-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 900px) {
  .page-about .about-milestones {
    padding: 88px 0;
  }

  .page-about .about-timeline {
    margin-top: 24px;
  }

  .page-about .timeline-rail {
    display: block;
    position: absolute;
    left: 160px;
    width: 56px;
    top: 8px;
    bottom: 8px;
    z-index: 0;
    pointer-events: none;
  }

  .page-about .timeline-rail svg {
    display: block;
    width: 100%;
    height: 100%;
    overflow: visible;
  }

  .page-about .timeline-item {
    grid-template-columns: 160px 56px 1fr;
    column-gap: 0;
    row-gap: 0;
    padding-bottom: 44px;
  }

  .page-about .timeline-dot {
    grid-column: 2;
    grid-row: 1;
    justify-self: center;
    margin-top: 26px;
  }

  .page-about .timeline-year {
    grid-column: 1;
    grid-row: 1;
    justify-self: end;
    align-self: start;
    padding-right: 12px;
    font-size: 3rem;
    line-height: 1;
    text-align: right;
    margin-top: 4px;
  }

  .page-about .timeline-card {
    grid-column: 3;
    grid-row: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .team-bar-fill {
    animation: none;
    transform: scaleX(1);
  }

  .page-about .timeline-card,
  .page-about .cap-card,
  .page-about .about-link-card {
    transition: none;
    transform: none;
  }
}

.page-about {
  --fill: currentColor;
}