.page-about {
  background: var(--paper-white);
  color: var(--ink-gray);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-about .container {
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

@media (min-width: 961px) {
  .page-about .container {
    padding-left: 32px;
    padding-right: 32px;
  }
}

/* 首屏 */
.page-about__hero {
  position: relative;
  padding: 130px 0 72px;
  background: linear-gradient(155deg, rgba(22, 53, 94, 0.92) 0%, rgba(10, 27, 58, 1) 62%);
  color: #f4f7fb;
  border-bottom: 4px solid var(--accent-orange);
}

.page-about__hero::after {
  content: "";
  display: block;
  height: 4px;
  background: linear-gradient(90deg, var(--accent-orange) 0%, var(--orange-glow) 55%, transparent 100%);
  position: absolute;
  left: 0;
  right: 0;
  bottom: -4px;
  z-index: 3;
}

.page-about__hero-grid-lines {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(184, 194, 204, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(184, 194, 204, 0.07) 1px, transparent 1px);
  background-size: 24px 24px;
  pointer-events: none;
  z-index: 1;
}

.page-about__hero-grid {
  position: relative;
  z-index: 2;
  display: grid;
  gap: 40px;
  align-items: center;
}

.page-about__breadcrumb {
  position: relative;
  z-index: 2;
  display: flex;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: rgba(244, 247, 251, 0.7);
  margin-bottom: 48px;
}

.page-about__breadcrumb a {
  color: rgba(244, 247, 251, 0.7);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.page-about__breadcrumb a:hover {
  color: var(--orange-glow);
  border-bottom-color: var(--orange-glow);
}

.page-about__breadcrumb-sep {
  color: rgba(184, 194, 204, 0.5);
}

.page-about__hero-kicker {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--orange-glow);
  margin-bottom: 16px;
}

.page-about__hero-title {
  font-family: var(--font-title);
  font-size: 32px;
  font-weight: 800;
  line-height: 1.22;
  letter-spacing: -0.02em;
  color: #ffffff;
  margin-bottom: 20px;
}

.page-about__hero-desc {
  font-size: 16px;
  line-height: 1.8;
  color: rgba(244, 247, 251, 0.8);
  max-width: 540px;
  margin-bottom: 28px;
}

.page-about__hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about__hero-meta .mono {
  font-size: 12px;
  color: var(--silver-line);
  padding: 6px 14px;
  border: 1px solid rgba(184, 194, 204, 0.3);
  border-radius: var(--radius-pill);
}

.page-about__hero-panel {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(184, 194, 204, 0.22);
  border-radius: 12px;
  padding: 24px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.page-about__hero-panel-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--orange-glow);
  border-bottom: 1px solid rgba(184, 194, 204, 0.2);
  padding-bottom: 12px;
  margin-bottom: 18px;
}

.page-about__hero-panel ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about__hero-panel li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px dashed rgba(184, 194, 204, 0.18);
  padding-bottom: 10px;
}

.page-about__hero-panel li:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.page-about__hero-panel li span {
  font-size: 13px;
  color: rgba(244, 247, 251, 0.65);
}

.page-about__hero-panel li strong {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 600;
  color: #f4f7fb;
}

.page-about__orange-text {
  color: var(--accent-orange);
}

@media (min-width: 961px) {
  .page-about__hero {
    padding: 180px 0 96px;
  }

  .page-about__hero-grid {
    grid-template-columns: 1.2fr 0.8fr;
    gap: 80px;
  }

  .page-about__hero-title {
    font-size: 48px;
    line-height: 1.15;
  }

  .page-about__hero-panel {
    padding: 32px;
  }
}

/* 通用章节 */
.page-about__section {
  padding: 64px 0;
  position: relative;
}

@media (min-width: 961px) {
  .page-about__section {
    padding: 96px 0;
  }
}

.page-about__section-index {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.12em;
  color: var(--accent-orange);
  margin-bottom: 10px;
}

.page-about__section-index .mono {
  font-size: 13px;
  color: var(--silver-line);
  letter-spacing: 0.08em;
}

.page-about__section-title {
  font-family: var(--font-title);
  font-size: 28px;
  font-weight: 800;
  color: var(--deep-blue);
  letter-spacing: -0.01em;
  line-height: 1.25;
  margin-bottom: 16px;
}

.page-about__section-desc {
  font-size: 15px;
  line-height: 1.8;
  color: #5a6a7e;
  max-width: 560px;
  margin-bottom: 32px;
}

@media (min-width: 961px) {
  .page-about__section-title {
    font-size: 36px;
  }
}

/* 01 品牌缘起 */
.page-about__origin {
  border-bottom: 1px solid rgba(184, 194, 204, 0.4);
}

.page-about__origin-grid {
  display: grid;
  gap: 40px;
  align-items: center;
}

.page-about__origin-content .lead {
  font-size: 18px;
  font-weight: 500;
  line-height: 1.8;
  color: var(--deep-blue);
  margin-bottom: 16px;
}

.page-about__origin-content p {
  font-size: 15px;
  line-height: 1.85;
  color: #4a5a6e;
  margin-bottom: 16px;
}

.page-about__origin-points {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about__origin-points li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  font-size: 14px;
  line-height: 1.7;
  color: #33475c;
  background: #ffffff;
  border: 1px solid rgba(184, 194, 204, 0.5);
  border-left: 3px solid var(--accent-orange);
  border-radius: var(--radius-print);
  padding: 14px 16px;
}

.page-about__origin-points .mono {
  font-size: 12px;
  color: var(--accent-orange);
  padding-top: 2px;
}

.page-about__origin-figure {
  margin: 0;
}

.page-about__origin-figure img {
  width: 100%;
  height: auto;
  border-radius: 12px;
  border: 1px solid var(--silver-line);
  box-shadow: 0 12px 32px rgba(10, 27, 58, 0.12);
}

.page-about__origin-figure figcaption {
  font-size: 12px;
  color: var(--silver-line);
  text-align: right;
  margin-top: 10px;
  letter-spacing: 0.06em;
}

@media (min-width: 961px) {
  .page-about__origin-grid {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 80px;
  }
}

/* 02 发展里程碑 */
.page-about__milestone {
  background: #ffffff;
}

.page-about__milestone-banner {
  margin: 32px 0 0;
}

.page-about__milestone-banner img {
  display: block;
  width: 100%;
  height: auto;
  max-width: none;
}

@media (min-width: 961px) {
  .page-about__milestone-banner {
    margin-top: 48px;
  }

  .page-about__milestone-banner img {
    height: 420px;
    object-fit: cover;
  }
}

.page-about__timeline {
  list-style: none;
  margin: 48px 0 0;
  padding: 0;
  display: grid;
  gap: 32px;
  position: relative;
}

.page-about__timeline::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 7px;
  width: 2px;
  background: rgba(184, 194, 204, 0.6);
}

.page-about__timeline-item {
  position: relative;
  padding-left: 36px;
}

.page-about__timeline-item::before {
  content: "";
  position: absolute;
  top: 6px;
  left: 0;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent-orange);
  box-shadow: 0 0 0 4px rgba(255, 92, 53, 0.18);
}

.page-about__timeline-year {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 600;
  color: var(--bright-blue);
  line-height: 1.4;
  margin: 0 0 6px;
}

.page-about__timeline-item h3 {
  font-family: var(--font-title);
  font-size: 20px;
  font-weight: 700;
  color: var(--deep-blue);
  margin: 0 0 8px;
}

.page-about__timeline-item p {
  font-size: 14px;
  line-height: 1.7;
  color: #4a5a6e;
  margin: 0;
}

@media (min-width: 961px) {
  .page-about__timeline {
    grid-template-columns: repeat(6, 1fr);
    gap: 24px;
    margin-top: 64px;
  }

  .page-about__timeline::before {
    top: 8px;
    left: 0;
    right: 0;
    bottom: auto;
    width: auto;
    height: 2px;
  }

  .page-about__timeline-item {
    padding-left: 0;
    padding-top: 40px;
  }

  .page-about__timeline-item::before {
    top: 0;
    left: 0;
  }

  .page-about__timeline-item {
    padding-right: 16px;
  }
}

.page-about__chart {
  margin: 56px 0 0;
  background: var(--deep-blue);
  border-radius: 12px;
  padding: 24px;
  color: #f4f7fb;
}

.page-about__chart-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  font-size: 12px;
  color: var(--silver-line);
  letter-spacing: 0.06em;
  margin-bottom: 16px;
}

.page-about__chart svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-about__chart figcaption {
  font-size: 12px;
  color: var(--silver-line);
  margin-top: 12px;
  letter-spacing: 0.04em;
}

@media (min-width: 961px) {
  .page-about__chart {
    padding: 36px 40px;
  }
}

/* 03 核心数据 */
.page-about__stats {
  background: var(--deep-blue);
}

.page-about__stats-panel {
  position: relative;
  z-index: 1;
}

.page-about__section-index--on-dark .mono {
  color: rgba(184, 194, 204, 0.8);
}

.page-about__section-title--on-dark {
  color: #f4f7fb;
}

.page-about__stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-top: 40px;
}

.page-about__stat {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(184, 194, 204, 0.2);
  border-radius: 12px;
  padding: 24px 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-about__stat-num {
  font-family: var(--font-title);
  font-size: 36px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: #ffffff;
  line-height: 1;
}

.page-about__stat-unit {
  font-size: 20px;
  color: var(--accent-orange);
  margin-left: 4px;
}

.page-about__stat-label {
  font-size: 14px;
  color: var(--silver-line);
}

.page-about__stats-extra {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid rgba(184, 194, 204, 0.2);
}

.page-about__stats-extra .mono {
  font-size: 12px;
  color: var(--orange-glow);
  background: rgba(255, 92, 53, 0.08);
  border: 1px solid rgba(255, 92, 53, 0.22);
  border-radius: var(--radius-pill);
  padding: 6px 12px;
}

@media (min-width: 961px) {
  .page-about__stats-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 28px;
    margin-top: 56px;
  }

  .page-about__stat {
    padding: 32px 24px;
  }

  .page-about__stat-num {
    font-size: 44px;
  }
}

/* 04 资质与认证 */
.page-about__certs {
  background: var(--paper-white);
}

.page-about__certs-grid {
  display: grid;
  gap: 24px;
  margin-top: 40px;
}

.page-about__cert-card {
  perspective: 1200px;
  min-height: 300px;
  cursor: pointer;
}

.page-about__cert-inner {
  position: relative;
  height: 100%;
  transform-style: preserve-3d;
  transition: transform 0.6s ease;
}

.page-about__cert-card:hover .page-about__cert-inner,
.page-about__cert-card:focus-within .page-about__cert-inner {
  transform: rotateY(180deg);
}

.page-about__cert-face {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  padding: 24px;
  background: #ffffff;
  border: 1px solid rgba(184, 194, 204, 0.6);
  border-radius: var(--radius-print);
  box-shadow: 0 8px 24px rgba(10, 27, 58, 0.08);
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
}

.page-about__cert-face--back {
  transform: rotateY(180deg);
  background: var(--deep-blue);
  border-color: var(--deep-blue);
}

.page-about__cert-idx {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--accent-orange);
  text-transform: uppercase;
  margin-bottom: auto;
}

.page-about__cert-face h3 {
  font-family: var(--font-title);
  font-size: 20px;
  font-weight: 700;
  color: var(--deep-blue);
  margin: 16px 0 8px;
  line-height: 1.35;
}

.page-about__cert-face p {
  font-size: 14px;
  line-height: 1.75;
  color: #4a5a6e;
  margin: 0;
}

.page-about__cert-face--back p {
  color: rgba(244, 247, 251, 0.8);
  margin-top: 16px;
}

@media (min-width: 961px) {
  .page-about__certs-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
    margin-top: 56px;
  }

  .page-about__cert-card {
    min-height: 320px;
  }

  .page-about__cert-face {
    padding: 28px;
  }
}

/* 05 合作生态与荣誉 */
.page-about__ecosystem {
  background: #ffffff;
}

.page-about__ecosystem-grid {
  display: grid;
  gap: 40px;
  align-items: start;
}

.page-about__eco-list {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about__eco-list li {
  font-size: 15px;
  line-height: 1.7;
  color: #33475c;
  background: var(--paper-white);
  border-left: 3px solid var(--bright-blue);
  border-radius: var(--radius-print);
  padding: 16px 18px;
}

.page-about__eco-list strong {
  font-weight: 700;
  color: var(--deep-blue);
}

.page-about__honors-title {
  font-size: 12px;
  color: var(--silver-line);
  letter-spacing: 0.1em;
  margin: 0 0 16px;
}

.page-about__honors-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 4px;
}

.page-about__honors-list li {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 14px 0;
  border-bottom: 1px dashed rgba(184, 194, 204, 0.6);
}

.page-about__honors-list li:last-child {
  border-bottom: none;
}

.page-about__honors-list .mono {
  font-size: 12px;
  color: var(--accent-orange);
  padding-top: 4px;
}

.page-about__honors-list strong {
  display: block;
  font-size: 16px;
  font-weight: 700;
  color: var(--deep-blue);
  line-height: 1.4;
}

.page-about__honors-list small {
  font-size: 13px;
  color: #5a6a7e;
}

@media (min-width: 961px) {
  .page-about__ecosystem-grid {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 72px;
  }
}

/* 06 团队 */
.page-about__team {
  background: var(--paper-white);
}

.page-about__team-grid {
  display: grid;
  gap: 40px;
  align-items: center;
}

.page-about__team-figure {
  margin: 0;
}

.page-about__team-figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 12px;
  border: 1px solid var(--silver-line);
  box-shadow: 0 12px 32px rgba(10, 27, 58, 0.08);
}

.page-about__team-figure figcaption {
  font-size: 12px;
  color: var(--silver-line);
  text-align: right;
  margin-top: 10px;
  letter-spacing: 0.06em;
}

.page-about__team-copy p {
  font-size: 15px;
  line-height: 1.8;
  color: #4a5a6e;
  margin-bottom: 16px;
}

.page-about__team-note {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.65;
  color: var(--deep-blue);
  background: rgba(45, 107, 255, 0.06);
  border: 1px solid rgba(45, 107, 255, 0.18);
  border-radius: var(--radius-print);
  padding: 12px 14px;
}

.page-about__team-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 20px;
}

@media (min-width: 961px) {
  .page-about__team-grid {
    grid-template-columns: 1fr 1fr;
    gap: 72px;
  }
}

/* 信任入口 */
.page-about__cta {
  padding: 72px 0;
  background: linear-gradient(160deg, var(--deep-blue) 0%, var(--medium-blue) 100%);
  text-align: center;
  color: #f4f7fb;
}

.page-about__cta-card .mono {
  font-size: 14px;
  letter-spacing: 0.12em;
  color: var(--orange-glow);
  text-transform: uppercase;
}

.page-about__cta-card h2 {
  font-family: var(--font-title);
  font-size: 28px;
  font-weight: 800;
  color: #ffffff;
  margin: 16px 0 12px;
  line-height: 1.25;
}

.page-about__cta-card p {
  font-size: 15px;
  line-height: 1.8;
  color: rgba(244, 247, 251, 0.75);
  max-width: 480px;
  margin: 0 auto 28px;
}

.page-about__cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

.page-about__cta-actions .btn-outline {
  border-color: rgba(244, 247, 251, 0.4);
  color: #f4f7fb;
}

.page-about__cta-actions .btn-outline:hover {
  border-color: var(--orange-glow);
  color: var(--orange-glow);
}

@media (min-width: 961px) {
  .page-about__cta {
    padding: 96px 0;
  }

  .page-about__cta-card h2 {
    font-size: 36px;
  }
}