.page-about {
  --about-journey-card-bg: rgba(255,255,255,0.05);
  --about-journey-card-border: rgba(255,255,255,0.09);
}

/* ===== 首屏宣言 ===== */
.page-about .about-hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: flex-end;
  color: #FFFFFF;
  background: var(--color-primary);
  overflow: hidden;
  border-bottom-left-radius: 60px;
}

.page-about .about-hero-media {
  position: absolute;
  inset: 0;
}

.page-about .about-hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  opacity: 0.4;
}

.page-about .about-hero-scrim {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(15,46,74,0.15) 0%, rgba(15,46,74,0.45) 60%, rgba(15,46,74,0.95) 100%),
    linear-gradient(105deg, rgba(27,107,143,0.2) 0%, transparent 40%);
}

.page-about .about-hero-scrim::after {
  content: '';
  position: absolute;
  right: -6%;
  top: 0;
  width: 62%;
  height: 100%;
  background: repeating-linear-gradient(
    135deg,
    rgba(255,255,255,0.06) 0,
    rgba(255,255,255,0.06) 1px,
    transparent 1px,
    transparent 14px
  );
  clip-path: polygon(34% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-about .about-hero-body {
  position: relative;
  z-index: 2;
  padding-top: 120px;
  padding-bottom: 72px;
}

.page-about .about-hero .breadcrumb {
  color: rgba(255,255,255,0.6);
  margin-bottom: 28px;
}

.page-about .about-hero .breadcrumb a {
  color: rgba(255,255,255,0.75);
}

.page-about .about-hero .breadcrumb .breadcrumb-current {
  color: var(--color-gold);
}

.page-about .about-hero .section-tag {
  color: var(--color-gold);
  margin-bottom: 14px;
}

.page-about .about-hero-title {
  font-size: var(--font-scale-h1);
  line-height: 1.16;
  letter-spacing: -0.03em;
  margin: 0 0 24px;
  max-width: 12em;
}

.page-about .about-hero-lead {
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.8;
  color: rgba(255,255,255,0.82);
  max-width: 44em;
  margin-bottom: 28px;
}

.page-about .about-hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 32px;
}

.page-about .about-hero-meta .tag {
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.18);
  color: #FFFFFF;
  backdrop-filter: blur(6px);
}

.page-about .about-hero-meta .tag-gold {
  color: var(--color-gold);
  border-color: rgba(255,200,87,0.4);
}

.page-about .about-hero-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  border-top: 1px solid rgba(255,255,255,0.14);
  padding-top: 18px;
}

.page-about .about-hero-jump a {
  color: rgba(255,255,255,0.72);
  font-size: 13px;
  font-family: var(--font-body);
  text-decoration: none;
  transition: color var(--transition);
}

.page-about .about-hero-jump a:hover,
.page-about .about-hero-jump a:focus-visible {
  color: var(--color-gold);
}

/* ===== 起源故事 ===== */
.page-about .about-origin-grid {
  display: grid;
  gap: 36px;
  align-items: start;
}

.page-about .about-origin-copy h2 {
  margin: 14px 0 18px;
}

.page-about .about-origin-copy .rich-text p {
  margin-bottom: 16px;
  max-width: 46em;
}

.page-about .about-origin-aside {
  background: var(--color-primary);
  border: 0;
  border-radius: var(--radius-m);
  color: #FFFFFF;
  padding: 28px 24px;
  position: relative;
  overflow: hidden;
}

.page-about .about-origin-aside::after {
  content: '';
  position: absolute;
  right: -42px;
  top: -42px;
  width: 110px;
  height: 110px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255,90,54,0.5) 0%, transparent 70%);
}

.page-about .about-origin-aside-kicker {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.1em;
  color: var(--color-gold);
  margin-bottom: 24px;
}

.page-about .about-origin-stats {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
}

.page-about .about-origin-stats li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  border-bottom: 1px solid rgba(255,255,255,0.12);
  padding: 14px 0;
}

.page-about .about-origin-stats li:first-child {
  padding-top: 0;
}

.page-about .about-origin-stats li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .about-origin-stats .data-number {
  font-size: 28px;
  font-weight: 900;
  line-height: 1.1;
  color: var(--color-accent);
  white-space: nowrap;
}

.page-about .about-origin-stats .data-unit {
  font-size: 12px;
  color: rgba(255,255,255,0.72);
}

.page-about .about-origin-aside .caption {
  color: rgba(255,255,255,0.45);
}

/* ===== 发展里程碑 ===== */
.page-about .about-journey {
  position: relative;
  padding-top: 96px;
  padding-bottom: 96px;
  overflow: hidden;
}

.page-about .about-journey::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 6px;
  background: linear-gradient(90deg,
    var(--color-accent) 0 12%,
    var(--color-gold) 12% 26%,
    var(--color-primary-light) 26% 52%,
    var(--color-data-green) 52% 78%,
    var(--color-accent) 78% 100%);
  opacity: 0.6;
}

.page-about .about-journey .section-tag {
  color: var(--color-gold);
}

.page-about .about-journey .section-hd-caption {
  color: rgba(255,255,255,0.62);
}

.page-about .about-journey-scale {
  display: flex;
  align-items: center;
  gap: 16px;
  margin: 48px 0 28px;
  font-family: var(--font-body);
  font-size: 12px;
  color: rgba(255,255,255,0.55);
}

.page-about .about-journey-scale-line {
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-primary-light));
  position: relative;
}

.page-about .about-journey-scale-line::after {
  content: '';
  position: absolute;
  right: 0;
  top: -3px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-accent);
}

.page-about .about-journey-layout {
  margin-top: 8px;
  display: grid;
  gap: 36px;
}

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

.page-about .about-journey-list::before {
  content: '';
  position: absolute;
  left: 7px;
  top: 18px;
  bottom: 18px;
  width: 2px;
  background: linear-gradient(180deg, var(--color-primary-light), rgba(27,107,143,0.2));
  border-radius: 2px;
}

.page-about .about-journey-item {
  position: relative;
  padding: 0 0 24px 34px;
}

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

.page-about .about-journey-item:nth-child(2) {
  margin-top: 8px;
}

.page-about .about-journey-item:nth-child(3) {
  margin-top: 20px;
}

.page-about .about-journey-item:nth-child(4) {
  margin-top: 12px;
}

.page-about .about-journey-item:nth-child(5) {
  margin-top: 24px;
}

.page-about .about-journey-dot {
  position: absolute;
  left: 0;
  top: 26px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 0 5px rgba(255,90,54,0.18), 0 0 20px rgba(255,90,54,0.45);
}

.page-about .about-journey-card {
  background: var(--about-journey-card-bg);
  border: 1px solid var(--about-journey-card-border);
  color: #FFFFFF;
  padding: 20px 20px 8px;
  transition: border-color var(--transition), transform var(--transition);
}

.page-about .about-journey-card:hover {
  border-color: rgba(255,200,87,0.45);
  transform: translateY(-2px);
}

.page-about .about-journey-year {
  display: block;
  font-size: 42px;
  font-weight: 900;
  line-height: 1;
  color: var(--color-accent);
  letter-spacing: -0.04em;
  margin-bottom: 12px;
}

.page-about .about-journey-card h3 {
  margin: 0 0 8px;
  font-size: 21px;
  color: #FFFFFF;
}

.page-about .about-journey-card p {
  margin: 0 0 12px;
  font-size: 13px;
  line-height: 1.75;
  color: rgba(255,255,255,0.78);
}

.page-about .about-journey-more {
  border-top: 1px dashed rgba(255,255,255,0.14);
  padding-top: 10px;
  margin-bottom: 10px;
}

.page-about .about-journey-more summary {
  cursor: pointer;
  font-family: var(--font-body);
  font-size: 12px;
  color: var(--color-gold);
  list-style: none;
  transition: color var(--transition);
}

.page-about .about-journey-more summary::-webkit-details-marker {
  display: none;
}

.page-about .about-journey-more summary:hover {
  color: var(--color-accent);
}

.page-about .about-journey-more summary::before {
  content: '＋ ';
}

.page-about .about-journey-more[open] summary::before {
  content: '－ ';
}

.page-about .about-journey-more p {
  margin-top: 12px;
  font-size: 13px;
}

.page-about .about-journey-visual {
  border-radius: var(--radius-m);
  overflow: hidden;
}

.page-about .about-journey-visual img {
  width: 100%;
  height: 320px;
  object-fit: cover;
  display: block;
}

.page-about .about-journey-visual .caption {
  margin-top: 10px;
  color: rgba(255,255,255,0.48);
}

/* ===== 团队与理念 ===== */
.page-about .about-team-layout {
  display: grid;
  gap: 28px;
  margin-top: 40px;
  align-items: center;
}

.page-about .about-team-copy .rich-text p {
  max-width: 44em;
  margin-bottom: 16px;
}

.page-about .about-team-copy .btn {
  margin-top: 8px;
}

.page-about .about-team-image {
  border-radius: var(--radius-m);
  overflow: hidden;
  box-shadow: var(--shadow-m);
}

.page-about .about-team-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .about-values {
  list-style: none;
  margin: 48px 0 0;
  padding: 0;
  display: grid;
  gap: 20px;
}

.page-about .about-value-card {
  perspective: 1400px;
  height: 260px;
}

.page-about .about-value-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  transition: transform 0.7s cubic-bezier(0.2, 0.8, 0.2, 1);
}

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

.page-about .about-value-face {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 28px;
  text-align: center;
  border-radius: var(--radius-m);
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
}

.page-about .about-value-front {
  background:
    linear-gradient(135deg, rgba(255,255,255,0.06) 0%, transparent 55%),
    var(--color-primary);
  border: 1px solid rgba(255,255,255,0.1);
  color: #FFFFFF;
}

.page-about .about-value-front h3 {
  margin: 12px 0 0;
  font-size: 32px;
  color: #FFFFFF;
}

.page-about .about-value-num {
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 700;
  color: var(--color-accent);
  letter-spacing: 0.08em;
}

.page-about .about-value-hint {
  margin: 24px 0 0;
  font-family: var(--font-body);
  font-size: 11px;
  color: rgba(255,255,255,0.5);
}

.page-about .about-value-back {
  background:
    linear-gradient(135deg, rgba(15,46,74,0.25) 0%, transparent 60%),
    var(--color-accent);
  color: #FFFFFF;
  transform: rotateY(180deg);
}

.page-about .about-value-back p {
  margin: 0;
  max-width: 16em;
  font-size: 14px;
  line-height: 1.85;
}

/* ===== 资质与荣誉 ===== */
.page-about .about-honor-grid {
  display: grid;
  gap: 20px;
  margin-top: 40px;
}

.page-about .about-honor-card {
  position: relative;
  padding: 26px 24px 26px 28px;
  border-left: 4px solid var(--color-accent);
  height: 100%;
}

.page-about .about-honor-card h3 {
  margin-bottom: 10px;
  font-size: 20px;
}

.page-about .about-honor-card p {
  margin-bottom: 0;
  font-size: 14px;
  line-height: 1.8;
  color: #444e5a;
}

.page-about .about-honor-cta {
  margin-top: 40px;
  padding: 36px 24px;
  border-radius: var(--radius-m);
  border: 1px solid #e4ddcf;
  background:
    linear-gradient(120deg, rgba(255,200,87,0.18) 0%, transparent 38%),
    var(--color-bg);
  text-align: center;
}

.page-about .about-honor-cta p {
  margin: 0 auto 24px;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-ink);
}

.page-about .about-honor-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

/* ===== 桌面端增强 ===== */
@media (min-width: 600px) {
  .page-about .about-origin-stats li {
    flex-direction: row;
    justify-content: space-between;
    align-items: baseline;
  }
}

@media (min-width: 640px) {
  .page-about .about-values {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-about .about-honor-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    min-height: 88vh;
  }

  .page-about .about-hero-title {
    font-size: var(--font-scale-display);
  }

  .page-about .about-hero-lead {
    font-size: 16px;
    max-width: 40em;
  }

  .page-about .about-origin-grid {
    grid-template-columns: 1.4fr 0.6fr;
    gap: 56px;
  }

  .page-about .about-journey-layout {
    grid-template-columns: 1fr 340px;
    gap: 56px;
    align-items: start;
  }

  .page-about .about-journey-item:nth-child(2) {
    margin-top: 56px;
  }

  .page-about .about-journey-item:nth-child(3) {
    margin-top: 16px;
  }

  .page-about .about-journey-item:nth-child(4) {
    margin-top: 48px;
  }

  .page-about .about-journey-item:nth-child(5) {
    margin-top: 20px;
  }

  .page-about .about-journey-visual {
    position: sticky;
    top: 120px;
  }

  .page-about .about-journey-visual img {
    height: auto;
    aspect-ratio: 5 / 8;
  }

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

  .page-about .about-value-card {
    height: 280px;
  }

  .page-about .about-honor-grid {
    gap: 24px;
  }

  .page-about .about-honor-cta {
    padding: 48px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-value-inner,
  .page-about .about-journey-card,
  .page-about .about-hero-jump a {
    transition: none;
  }
}