.page-about {
  --about-radius-lg: 28px;
  --about-radius-md: 18px;
  --about-ink-soft: #3D4556;
  --about-cloud-deep: #EAF0F7;
  --about-gradient-blue: linear-gradient(145deg, #2B3A67 0%, #4A6FA5 100%);
  --about-gradient-orange: linear-gradient(135deg, #FF6B35 0%, #FF8C5A 100%);
  position: relative;
  overflow-x: hidden;
}

.page-about .container {
  width: min(1180px, 100% - 48px);
  margin-inline: auto;
}

.page-about .breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 22px 0 0;
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--c-indigo-light);
}

.page-about .breadcrumbs a {
  color: var(--c-indigo-light);
  text-decoration: none;
  transition: color .3s var(--ease);
}

.page-about .breadcrumbs a:hover {
  color: var(--c-orange);
}

.page-about .kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 14px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: .18em;
  text-transform: none;
  color: var(--c-indigo-light);
}

.page-about .section-title {
  margin: 0;
  font-size: clamp(26px, 4vw, 42px);
  line-height: 1.2;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--c-indigo);
}

.page-about .section-head {
  position: relative;
  margin-bottom: 42px;
}

.page-about .section-title-wrap {
  display: flex;
  align-items: flex-start;
  gap: 14px;
}

.page-about .section-desc {
  max-width: 560px;
  margin: 16px 0 0;
  font-size: 15px;
  font-weight: 300;
  line-height: 1.8;
  color: var(--c-ink);
}

.page-about .vertical-note {
  writing-mode: vertical-rl;
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--c-orange);
  font-weight: 500;
  opacity: .9;
  margin-top: 4px;
  flex-shrink: 0;
}

/* ---------- 品牌故事 ---------- */
.page-about .story-section {
  position: relative;
  padding: 76px 0 96px;
}

.page-about .story-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.page-about .story-bg::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(15, 27, 45, .55) 0%, rgba(244, 247, 251, .72) 72%, #FFFFFF 100%);
  z-index: 1;
}

.page-about .story-bg::after {
  content: "";
  position: absolute;
  top: -18%;
  right: -10%;
  width: 340px;
  height: 340px;
  border: 2px dashed rgba(255, 255, 255, .42);
  border-radius: 50%;
  z-index: 2;
  pointer-events: none;
}

.page-about .story-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
}

.page-about .story-grid {
  position: relative;
  z-index: 3;
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
}

.page-about .story-main {
  max-width: 720px;
}

.page-about .story-main .kicker {
  color: #FF8C5A;
  background: rgba(15, 27, 45, .35);
  padding: 6px 14px;
  border-radius: 999px;
  backdrop-filter: blur(4px);
}

.page-about .story-main h1 {
  margin: 14px 0 22px;
  font-size: clamp(36px, 6.4vw, 68px);
  line-height: 1.08;
  font-weight: 700;
  letter-spacing: -.02em;
  color: var(--c-snow);
  text-shadow: 0 4px 36px rgba(15, 27, 45, .28);
}

.page-about .story-lead {
  font-size: clamp(17px, 2.4vw, 22px);
  line-height: 1.65;
  font-weight: 400;
  color: #F4F7FB;
  max-width: 560px;
  margin-bottom: 28px;
  text-shadow: 0 2px 18px rgba(15, 27, 45, .18);
}

.page-about .story-copy {
  max-width: 640px;
  padding: 28px 28px 8px;
  background: rgba(255, 255, 255, .92);
  border-radius: var(--about-radius-lg);
  border: 1px solid rgba(255, 255, 255, .6);
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(8px);
}

.page-about .story-copy p {
  margin: 0 0 20px;
  font-size: 15px;
  line-height: 1.9;
  font-weight: 300;
  color: var(--c-ink);
}

.page-about .route-line {
  position: relative;
  height: 1px;
  margin: 56px 0 0;
  background: linear-gradient(90deg, var(--c-orange) 0%, var(--c-indigo-light) 40%, transparent 90%);
  overflow: visible;
}

.page-about .route-line::before {
  content: "";
  position: absolute;
  left: 0;
  top: -4px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--c-orange);
}

.page-about .story-aside {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  padding: 0;
}

.page-about .story-stat {
  background: rgba(255, 255, 255, .94);
  border-radius: var(--about-radius-md);
  padding: 22px 24px;
  border: 1px solid rgba(216, 225, 232, .9);
  box-shadow: var(--shadow-card);
}

.page-about .story-stat .card-label {
  display: block;
  margin-bottom: 10px;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--c-indigo-light);
}

.page-about .stat-num {
  display: block;
  font-family: var(--font-num);
  font-size: clamp(30px, 4vw, 40px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--c-indigo);
  margin-bottom: 6px;
}

.page-about .story-stat:nth-child(2) .stat-num {
  color: var(--c-orange);
}

.page-about .story-stat .card-desc {
  font-size: 13px;
  line-height: 1.6;
  color: var(--c-ink);
  font-weight: 300;
}

.page-about .story-aside .axis-index {
  position: absolute;
  right: 0;
  bottom: -46px;
  font-family: var(--font-num);
  font-size: 68px;
  font-weight: 700;
  color: rgba(255, 255, 255, .32);
  line-height: 1;
  pointer-events: none;
}

/* ---------- 技术路线 ---------- */
.page-about .tech-section {
  position: relative;
  padding: 96px 0;
  background: var(--c-cloud);
}

.page-about .stripe-diagonal {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: repeating-linear-gradient(-45deg, rgba(43, 58, 103, .03) 0px, rgba(43, 58, 103, .03) 1px, transparent 1px, transparent 14px);
  pointer-events: none;
  z-index: 0;
}

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

.page-about .tech-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.page-about .tech-card {
  min-height: 200px;
}

.page-about .tech-card .card-label {
  display: inline-block;
  margin-bottom: 14px;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .1em;
  color: var(--c-indigo-light);
}

.page-about .tech-card p.card-desc {
  margin-bottom: 20px;
}

.page-about .tech-card--main {
  background: var(--c-snow);
  border: 1px solid rgba(216, 225, 232, .8);
  box-shadow: var(--shadow-card);
}

.page-about .tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

.page-about .tech-tags span {
  display: inline-block;
  padding: 6px 14px;
  background: var(--c-cloud);
  color: var(--c-indigo);
  border-radius: 999px;
  font-size: 12px;
  font-weight: 500;
  border: 1px solid rgba(74, 111, 165, .18);
}

.page-about .tech-card--metric {
  display: flex;
  flex-direction: column;
  justify-content: center;
  background: var(--about-gradient-orange);
  box-shadow: var(--shadow-card);
  border: none;
  min-height: 180px;
}

.page-about .tech-card--metric .card-label {
  color: rgba(255, 255, 255, .85);
}

.page-about .tech-card--metric .card-num {
  font-family: var(--font-num);
  font-size: 68px;
  font-weight: 700;
  line-height: 1;
  color: var(--c-snow);
  margin: 8px 0 6px;
}

.page-about .tech-card--metric .card-desc {
  font-size: 13px;
  line-height: 1.7;
  color: rgba(255, 255, 255, .92);
  font-weight: 300;
}

.page-about .tech-media {
  overflow: hidden;
  border-radius: var(--about-radius-lg);
  box-shadow: var(--shadow-card);
  min-height: 220px;
}

.page-about .tech-media img {
  width: 100%;
  height: 100%;
  min-height: 240px;
  object-fit: cover;
  display: block;
  transition: transform .5s var(--ease);
}

.page-about .tech-media:hover img {
  transform: scale(1.03);
}

.page-about .tech-card--dark {
  background: var(--about-gradient-blue);
  border: none;
  color: var(--c-snow);
  min-height: 220px;
}

.page-about .tech-card--dark .card-label {
  color: var(--c-orange-light);
}

.page-about .tech-card--dark p.card-desc {
  color: rgba(255, 255, 255, .88);
}

.page-about .tech-card--dark .btn-ghost {
  border-color: rgba(255, 255, 255, .6);
  color: var(--c-snow);
}

.page-about .tech-card--dark .btn-ghost:hover {
  border-color: var(--c-snow);
  background: rgba(255, 255, 255, .08);
}

.page-about .legend {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  margin-top: 32px;
  padding: 16px 20px;
  background: var(--c-snow);
  border-radius: var(--about-radius-md);
  border: 1px solid rgba(216, 225, 232, .7);
}

.page-about .legend-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--c-ink);
  font-weight: 300;
}

.page-about .legend-swatch {
  width: 14px;
  height: 14px;
  border-radius: 4px;
  display: inline-block;
  flex-shrink: 0;
}

.page-about .legend-swatch--orange {
  background: var(--c-orange);
}

.page-about .legend-swatch--line {
  background: transparent;
  border: 2px dashed var(--c-indigo-light);
}

/* ---------- 发展历程 ---------- */
.page-about .timeline-section {
  padding: 18px 0 88px;
  background: var(--c-snow);
  position: relative;
}

.page-about .timeline-section .section-head {
  padding-top: 72px;
}

.page-about .timeline-svg {
  width: 100%;
  height: 100px;
  margin: 8px 0 28px;
  overflow: hidden;
}

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

.page-about .timeline-path {
  stroke: var(--c-line);
  stroke-width: 2;
  stroke-dasharray: 6 8;
  fill: none;
}

.page-about .timeline-node {
  fill: var(--c-snow);
  stroke: var(--c-orange);
  stroke-width: 4;
}

.page-about .timeline-node--current {
  fill: var(--c-orange);
  stroke: var(--c-snow);
  stroke-width: 3;
}

.page-about .timeline-scroll {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(260px, 82vw);
  gap: 16px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  padding: 4px 4px 20px;
  scrollbar-width: thin;
  scrollbar-color: var(--c-indigo-light) var(--c-cloud);
}

.page-about .timeline-scroll::-webkit-scrollbar {
  height: 6px;
}

.page-about .timeline-scroll::-webkit-scrollbar-track {
  background: var(--c-cloud);
  border-radius: 999px;
}

.page-about .timeline-scroll::-webkit-scrollbar-thumb {
  background: var(--c-indigo-light);
  border-radius: 999px;
}

.page-about .timeline-card {
  scroll-snap-align: start;
  background: var(--c-cloud);
  border-radius: var(--about-radius-lg);
  padding: 28px 26px;
  border: 1px solid rgba(216, 225, 232, .8);
  transition: box-shadow .35s var(--ease), transform .35s var(--ease);
}

.page-about .timeline-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}

.page-about .timeline-card .card-label {
  display: inline-block;
  margin-bottom: 14px;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .08em;
  color: var(--c-orange);
  font-family: var(--font-num);
}

.page-about .timeline-card .card-title {
  margin: 0 0 12px;
  font-size: 19px;
  font-weight: 700;
  color: var(--c-indigo);
  line-height: 1.4;
}

.page-about .timeline-card .card-desc {
  margin: 0;
  font-size: 13px;
  line-height: 1.8;
  font-weight: 300;
  color: var(--c-ink);
}

.page-about .timeline-card:last-child {
  background: var(--about-gradient-blue);
  border-color: transparent;
}

.page-about .timeline-card:last-child .card-label {
  color: var(--c-orange-light);
}

.page-about .timeline-card:last-child .card-title,
.page-about .timeline-card:last-child .card-desc {
  color: var(--c-snow);
}

.page-about .timeline-hint {
  margin: 12px 0 0;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--c-indigo-light);
  text-align: center;
  font-weight: 300;
}

/* ---------- 资质与合作 ---------- */
.page-about .trust-section {
  padding: 92px 0 88px;
  background: var(--c-night);
  position: relative;
}

.page-about .trust-section .section-title {
  color: var(--c-snow);
}

.page-about .trust-section .section-desc {
  color: rgba(255, 255, 255, .72);
}

.page-about .trust-section .kicker {
  color: var(--c-orange-light);
}

.page-about .trust-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.page-about .trust-card {
  background: rgba(255, 255, 255, .96);
  border-radius: var(--about-radius-lg);
  padding: 30px 28px;
  border: 1px solid rgba(216, 225, 232, .7);
  box-shadow: var(--shadow-card);
  min-height: 180px;
}

.page-about .trust-card .card-label {
  display: inline-block;
  margin-bottom: 14px;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .1em;
  color: var(--c-indigo-light);
}

.page-about .trust-card .card-title {
  margin: 0 0 14px;
  font-size: 22px;
  font-weight: 700;
  color: var(--c-indigo);
  line-height: 1.35;
}

.page-about .trust-card .card-desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  font-weight: 300;
  color: var(--c-ink);
  max-width: 400px;
}

.page-about .trust-card--eco {
  background: var(--c-snow);
}

.page-about .trust-card--eco .btn {
  margin-top: 22px;
}

.page-about .bento-card--orange {
  background: var(--about-gradient-orange);
  border: none;
}

.page-about .bento-card--orange .card-label {
  color: rgba(255, 255, 255, .85);
}

.page-about .bento-card--orange .card-title,
.page-about .bento-card--orange .card-desc {
  color: var(--c-snow);
}

.page-about .trust-media {
  border-radius: var(--about-radius-lg);
  overflow: hidden;
  min-height: 240px;
  box-shadow: var(--shadow-card);
}

.page-about .trust-media img {
  width: 100%;
  height: 100%;
  min-height: 260px;
  object-fit: cover;
  display: block;
  transition: transform .5s var(--ease);
}

.page-about .trust-media:hover img {
  transform: scale(1.02);
}

.page-about .trust-statement {
  margin-top: 44px;
  display: flex;
  flex-direction: column;
  gap: 18px;
  align-items: flex-start;
  padding: 30px 30px;
  background: rgba(255, 255, 255, .06);
  border: 1px solid rgba(255, 255, 255, .12);
  border-radius: var(--about-radius-lg);
}

.page-about .trust-statement p {
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  font-weight: 300;
  color: rgba(255, 255, 255, .86);
}

.page-about .trust-statement .btn-ghost {
  border-color: rgba(255, 255, 255, .5);
  color: var(--c-snow);
  flex-shrink: 0;
}

.page-about .trust-statement .btn-ghost:hover {
  border-color: var(--c-snow);
  background: rgba(255, 255, 255, .08);
}

/* ---------- 通用按钮 ---------- */
.page-about .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: .02em;
  border-radius: 999px;
  text-decoration: none;
  transition: background .3s var(--ease), border-color .3s var(--ease), color .3s var(--ease), transform .3s var(--ease);
  cursor: pointer;
  line-height: 1.4;
}

.page-about .btn-primary {
  background: var(--c-orange);
  color: var(--c-snow);
  border: 1px solid var(--c-orange);
}

.page-about .btn-primary:hover {
  background: var(--c-orange-light);
  border-color: var(--c-orange-light);
  transform: translateY(-2px);
}

.page-about .btn-ghost {
  background: transparent;
  border: 1px solid rgba(43, 58, 103, .4);
  color: var(--c-indigo);
}

.page-about .btn-ghost:hover {
  border-color: var(--c-orange);
  color: var(--c-orange);
  transform: translateY(-2px);
}

/* ---------- 卡片网格 ---------- */
.page-about .bento-card {
  border-radius: var(--about-radius-lg);
  padding: 30px 28px;
}

/* ---------- 响应式规则 ---------- */
@media (min-width: 620px) {
  .page-about .story-aside {
    grid-template-columns: repeat(3, 1fr);
  }

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

  .page-about .tech-card--main {
    grid-column: span 1;
  }

  .page-about .tech-media {
    grid-column: span 1;
  }

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

  .page-about .trust-card--eco {
    grid-column: span 2;
  }

  .page-about .trust-statement {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

@media (min-width: 860px) {
  .page-about .story-section {
    padding: 96px 0 120px;
  }

  .page-about .story-grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(280px, .9fr);
    gap: 56px;
    align-items: center;
  }

  .page-about .story-aside {
    grid-template-columns: 1fr;
  }

  .page-about .story-aside .axis-index {
    bottom: -56px;
    font-size: 84px;
  }

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

  .page-about .tech-card--main {
    grid-column: span 2;
  }

  .page-about .tech-card--metric {
    grid-column: span 1;
  }

  .page-about .tech-media {
    grid-column: span 1;
    grid-row: span 2;
    min-height: 100%;
  }

  .page-about .tech-card--dark {
    grid-column: span 2;
  }

  .page-about .timeline-scroll {
    grid-auto-columns: minmax(300px, 1fr);
  }

  .page-about .trust-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-about .trust-card {
    min-height: 220px;
  }

  .page-about .trust-card--eco {
    grid-column: span 2;
  }

  .page-about .trust-media {
    grid-column: span 2;
    grid-row: span 1;
  }

  .page-about .trust-card--eco {
    grid-column: span 2;
  }
}

@media (min-width: 1140px) {
  .page-about .container {
    width: min(1180px, 100% - 64px);
  }

  .page-about .story-copy p {
    font-size: 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about * {
    transition: none !important;
    animation: none !important;
  }

  .page-about .tech-media,
  .page-about .trust-media {
    overflow: hidden;
  }

  .page-about .tech-media img,
  .page-about .trust-media img {
    transition: none;
  }

  .page-about .timeline-card:hover,
  .page-about .btn-primary:hover,
  .page-about .btn-ghost:hover {
    transform: none;
  }
}