.page-about {
  --about-ink: #0B0B0F;
  --about-space: #0A1E3F;
  --about-space-deep: #061024;
  --about-orange: #FF6B35;
  --about-orange-bright: #FF824C;
  --about-silver: #C7C9D1;
  --about-mist: #E8E8F0;
  --about-muted: #8A8F9E;
  --about-glass: rgba(255, 255, 255, 0.1);
  --about-line: rgba(255, 255, 255, 0.18);
  --about-radius: 4px;
  --about-ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  background: var(--paper, #FFFFFF);
  color: var(--ink, #0B0B0F);
  overflow-x: clip;
}

.page-about *,
.page-about *::before,
.page-about *::after {
  box-sizing: border-box;
}

.page-about img {
  max-width: 100%;
  height: auto;
  display: block;
}

.page-about .container {
  width: min(100% - clamp(1.25rem, 4vw, 3.5rem) * 2, var(--page-max, 1360px));
  margin-inline: auto;
}

.page-about .container--narrow {
  width: min(100% - clamp(1.25rem, 4vw, 3.5rem) * 2, 960px);
}

.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  padding-block: 1.25rem 0;
  font-family: var(--font-mono, monospace);
  font-size: 0.8125rem;
  color: var(--about-muted);
}

.page-about .breadcrumb a {
  color: var(--about-muted);
  text-decoration: none;
  transition: color 0.2s var(--about-ease);
}

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

.page-about .breadcrumb__sep {
  color: var(--about-silver);
}

.page-about .breadcrumb__current {
  color: var(--about-ink);
}

.page-about .section {
  padding-block: clamp(3.5rem, 8vw, 7rem);
  position: relative;
}

.page-about .section--dark {
  background:
    radial-gradient(ellipse at 18% 12%, rgba(255, 107, 53, 0.16) 0%, transparent 42%),
    radial-gradient(ellipse at 88% 82%, rgba(255, 255, 255, 0.08) 0%, transparent 56%),
    linear-gradient(135deg, var(--about-space) 0%, var(--about-space-deep) 100%);
  color: #fff;
}

.page-about .section--tight {
  padding-block: 2rem;
}

.page-about .section-head {
  margin-bottom: clamp(2.5rem, 5vw, 4rem);
}

.page-about .section-head--light .section-head__title {
  color: #fff;
}

.page-about .section-head__title {
  margin: 0.75rem 0 0;
  font-size: clamp(1.8rem, 4vw, 3rem);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.14;
}

.page-about .section-head__desc {
  margin: 1rem 0 0;
  color: var(--about-muted);
  font-size: 1.0625rem;
  max-width: 44em;
  line-height: 1.7;
}

.page-about .section-kicker {
  margin: 0;
  font-family: var(--font-mono, monospace);
  font-size: 0.875rem;
  color: var(--about-orange);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.page-about .badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8125rem;
  font-weight: 600;
  padding: 0.4em 0.75em;
  border: 1px solid var(--about-line);
  border-radius: 999px;
  background: rgba(11, 11, 15, 0.04);
  color: var(--about-muted-strong, #535A68);
  white-space: nowrap;
}

.page-about .badge--live {
  position: relative;
  border-color: rgba(255, 107, 53, 0.42);
  background: rgba(255, 107, 53, 0.08);
  color: var(--about-orange-deep, #C2451A);
  font-family: var(--font-mono, monospace);
  font-size: 0.75rem;
}

.page-about .badge--live::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--about-orange);
  box-shadow: 0 0 0 0 rgba(255, 107, 53, 0.5);
}

/* ===== 首屏分屏 ===== */
.page-about .story-hero {
  position: relative;
  padding-block: clamp(2rem, 4vw, 3.5rem) clamp(3rem, 6vw, 5rem);
  background:
    linear-gradient(180deg, var(--about-mist) 0%, #F4F4F8 56%, #fff 100%);
  overflow: hidden;
}

.page-about .story-hero__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.5rem, 4vw, 3.75rem);
  align-items: center;
  position: relative;
  z-index: 2;
}

.page-about .story-hero__content {
  padding-block: clamp(1rem, 3vw, 2.5rem);
}

.page-about .story-hero__title {
  margin: 1rem 0 1.25rem;
  font-size: clamp(2.2rem, 5.6vw, 4.4rem);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.03em;
  text-wrap: balance;
}

.page-about .story-hero__lead {
  margin: 0 0 1.75rem;
  font-size: clamp(1rem, 1.5vw, 1.1875rem);
  line-height: 1.8;
  color: var(--about-muted-strong, #535A68);
  max-width: 42em;
}

.page-about .story-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.page-about .story-hero__visual {
  position: relative;
  max-width: 460px;
  width: 100%;
  margin-inline: auto;
}

.page-about .story-hero__img {
  position: relative;
  z-index: 1;
  width: 100%;
  border-radius: 12px;
  box-shadow: 0 18px 44px rgba(6, 16, 36, 0.18);
  transform: rotate(0.4deg);
  object-fit: cover;
  aspect-ratio: 5 / 6;
}

.page-about .story-hero__orbit {
  position: absolute;
  inset: -3.5% -3.5%;
  z-index: 0;
  pointer-events: none;
  transform: rotate(-4deg);
}

.page-about .story-hero__orbit::before {
  content: '';
  position: absolute;
  inset: 28%;
  border: 1px dashed rgba(255, 107, 53, 0.35);
  border-radius: 50%;
  animation: about-rotate 38s linear infinite;
}

.page-about .story-hero__orbit i {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 8px;
  height: 8px;
  margin: -4px;
  border-radius: 50%;
  background: var(--about-orange);
  box-shadow: 0 0 10px rgba(255, 107, 53, 0.8);
  transform: rotate(calc(var(--t) * 1deg)) translateX(154px);
  animation: about-rotate 28s linear infinite;
}

.page-about .story-hero__stardust {
  position: absolute;
  inset: 0;
  z-index: 1;
  background-image:
    radial-gradient(1px 1px at 12% 76%, rgba(10, 30, 63, 0.5) 0 1px, transparent 0),
    radial-gradient(1.5px 1.5px at 64% 18%, rgba(255, 107, 53, 0.5) 0 1.5px, transparent 0),
    radial-gradient(1px 1px at 81% 64%, rgba(10, 30, 63, 0.4) 0 1px, transparent 0),
    radial-gradient(1px 1px at 34% 12%, rgba(10, 30, 63, 0.4) 0 1px, transparent 0);
  pointer-events: none;
}

@keyframes about-rotate {
  to { transform: rotate(360deg); }
}

/* ===== 品牌叙事 ===== */
.page-about .story-intro {
  background: #fff;
}

.page-about .story-intro__text p {
  font-size: 1.0625rem;
  line-height: 1.9;
  margin: 0 0 1.15em;
  color: var(--about-ink);
}

.page-about .story-intro__text p:last-child {
  margin-bottom: 0;
}

/* ===== 时间轴 ===== */
.page-about .story-timeline-wrap {
  background:
    radial-gradient(circle at 12% 24%, rgba(255, 107, 53, 0.05) 0 120px, transparent 130px),
    radial-gradient(circle at 88% 68%, rgba(10, 30, 63, 0.04) 0 140px, transparent 150px);
  border-block: 1px solid var(--about-mist);
}

.page-about .timeline {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(2rem, 4vw, 3.5rem);
}

.page-about .timeline::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 15px;
  width: 2px;
  background: linear-gradient(180deg, transparent 0%, var(--about-silver) 8%, var(--about-orange) 50%, var(--about-silver) 92%, transparent 100%);
  transform: translateX(0);
}

.page-about .timeline__item {
  position: relative;
  padding-left: clamp(2.75rem, 6vw, 5rem);
}

.page-about .timeline__marker {
  position: absolute;
  top: 0.5rem;
  left: 0;
  width: 32px;
  height: 32px;
  border-radius: 50% 50% 50% 0;
  background: #fff;
  border: 2px solid var(--about-orange);
  transform: translateX(0);
  z-index: 1;
  box-shadow: 0 0 0 5px rgba(255, 107, 53, 0.1);
}

.page-about .timeline__marker::after {
  content: '';
  position: absolute;
  inset: 50%;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--about-orange);
  transform: translate(-50%, -50%);
}

.page-about .timeline__card {
  background: #fff;
  border: 1px solid var(--about-mist);
  border-left: 3px solid var(--about-orange);
  border-radius: var(--about-radius);
  padding: clamp(1.25rem, 3vw, 2rem);
  box-shadow: 0 6px 18px rgba(11, 11, 15, 0.05);
  transition: box-shadow 0.3s var(--about-ease);
  position: relative;
}

.page-about .timeline__card:hover {
  box-shadow: 0 10px 28px rgba(11, 11, 15, 0.09);
}

.page-about .timeline__card--media {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

.page-about .timeline__sticker {
  display: inline-block;
  font-family: var(--font-mono, monospace);
  font-size: 0.8125rem;
  color: var(--about-orange);
  background: rgba(255, 107, 53, 0.08);
  border: 1px solid rgba(255, 107, 53, 0.24);
  border-radius: 999px;
  padding: 0.35em 0.85em;
  margin-bottom: 0.75rem;
}

.page-about .timeline__card h3 {
  font-size: clamp(1.35rem, 2.6vw, 1.9rem);
  font-weight: 900;
  margin: 0 0 0.6rem;
  letter-spacing: -0.01em;
}

.page-about .timeline__card p {
  margin: 0;
  line-height: 1.7;
  color: var(--about-muted-strong, #535A68);
}

.page-about .timeline__detail {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.32s var(--about-ease);
  background: var(--about-mist);
  border-radius: 0 0 var(--about-radius) var(--about-radius);
  margin-top: 0.5rem;
}

.page-about .timeline__detail p {
  padding: 1rem;
  color: var(--about-ink);
}

.page-about .timeline-more {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.55em 1em;
  margin-top: 1rem;
  background: transparent;
  border: 1px solid var(--about-mist);
  border-radius: 999px;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  color: var(--about-orange);
  transition:
    border-color 0.2s,
    background 0.2s,
    transform 0.2s;
  font-family: var(--font-body, sans-serif);
}

.page-about .timeline-more:hover {
  border-color: var(--about-orange);
  background: rgba(255, 107, 53, 0.06);
  transform: translateY(-1px);
}

.page-about .timeline-more__icon {
  font-family: var(--font-mono, monospace);
  font-size: 1.05rem;
  font-weight: 400;
  display: inline-block;
  transition: transform 0.25s var(--about-ease);
}

.page-about .timeline-more[aria-expanded="true"] .timeline-more__icon {
  transform: rotate(45deg);
}

.page-about .timeline-more[aria-expanded="true"] + .timeline__detail {
  max-height: 420px;
}

.page-about .timeline__figure {
  margin: 0.75rem 0 0;
  position: relative;
  overflow: hidden;
  border-radius: var(--about-radius);
  background: var(--about-space);
  max-width: 330px;
}

.page-about .timeline__figure img {
  aspect-ratio: 3 / 4;
  object-fit: cover;
  transition: transform 0.4s var(--about-ease);
}

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

.page-about .timeline__figure figcaption {
  position: absolute;
  inset-inline: 0;
  bottom: 0;
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.85);
  padding: 1.5rem 0.875rem 0.625rem;
  background: linear-gradient(180deg, transparent, rgba(6, 16, 36, 0.82));
}

/* ===== 旧版栏目深探 ===== */
.page-about .story-old {
  background: #fff;
  overflow: hidden;
}

.page-about .story-old__body p {
  font-size: 1.0625rem;
  line-height: 1.9;
  margin: 0 0 1.15em;
}

.page-about .story-old__body a {
  color: var(--about-orange);
  text-decoration: underline;
  text-underline-offset: 0.2em;
  font-weight: 600;
  transition: color 0.2s;
}

.page-about .story-old__body a:hover {
  color: var(--about-orange-bright);
}

.page-about .price-inline {
  font-family: var(--font-mono, monospace);
  color: var(--about-orange);
  font-weight: 700;
  background: rgba(255, 107, 53, 0.08);
  padding: 0.2em 0.4em;
  border-radius: 4px;
}

.page-about .story-old__action {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2.25rem;
}

.page-about .btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75em 1.5em;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 700;
  font-size: 0.9375rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition:
    transform 0.2s var(--about-ease),
    box-shadow 0.25s var(--about-ease),
    background 0.2s,
    border-color 0.2s;
}

.page-about .btn:hover {
  transform: translateY(-2px);
}

.page-about .btn--primary {
  background: var(--about-orange);
  color: #fff;
  box-shadow: 0 8px 20px rgba(255, 107, 53, 0.28);
}

.page-about .btn--primary:hover {
  background: var(--about-orange-bright);
  box-shadow: 0 12px 26px rgba(255, 107, 53, 0.32);
}

.page-about .btn--ghost {
  background: transparent;
  border-color: var(--about-silver);
  color: var(--about-ink);
}

.page-about .btn--ghost:hover {
  border-color: var(--about-orange);
  color: var(--about-orange);
  box-shadow: 0 8px 20px rgba(11, 11, 15, 0.06);
}

.page-about .story-old__constellation {
  margin-top: clamp(2.5rem, 5vw, 3.75rem);
  opacity: 0.85;
}

.page-about .story-old__constellation svg {
  width: 100%;
  height: auto;
}

/* ===== 能力概览 ===== */
.page-about .story-capability {
  overflow: hidden;
}

.page-about .capability-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(1rem, 2vw, 1.5rem);
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .capability-list__item {
  position: relative;
  background: var(--about-glass);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--about-radius);
  padding: clamp(1.25rem, 2vw, 1.75rem);
  backdrop-filter: blur(6px);
  transition:
    border-color 0.25s,
    transform 0.25s var(--about-ease);
}

.page-about .capability-list__item:hover {
  border-color: rgba(255, 107, 53, 0.5);
  transform: translateY(-3px);
}

.page-about .capability-list__num {
  display: block;
  font-family: var(--font-mono, monospace);
  font-size: clamp(2rem, 4.5vw, 3.6rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: #fff;
  margin-bottom: 0.5rem;
}

.page-about .capability-list__plus {
  color: var(--about-orange);
  font-size: 0.55em;
  margin-left: 0.1em;
  font-weight: 400;
}

.page-about .capability-list__label {
  font-size: 0.9375rem;
  color: rgba(255, 255, 255, 0.78);
  line-height: 1.55;
}

.page-about .capability-map {
  margin-top: clamp(2rem, 4vw, 3rem);
  border-radius: var(--about-radius);
  overflow: hidden;
  max-height: 340px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  position: relative;
}

.page-about .capability-map img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.75) contrast(1.04);
  opacity: 0.92;
}

.page-about .capability-map::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(160deg, rgba(10, 30, 63, 0.2), transparent 70%);
  pointer-events: none;
}

/* ===== 资质与承诺 ===== */
.page-about .story-trust {
  background:
    radial-gradient(circle at 82% 14%, rgba(255, 107, 53, 0.08) 0 160px, transparent 170px),
    linear-gradient(180deg, #fff 0%, var(--about-mist) 100%);
}

.page-about .trust-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

.page-about .trust-item {
  background: #fff;
  border: 1px solid var(--about-mist);
  border-radius: var(--about-radius);
  padding: clamp(1.25rem, 2.6vw, 1.75rem);
  position: relative;
  overflow: hidden;
  transition:
    box-shadow 0.25s var(--about-ease),
    border-color 0.25s;
}

.page-about .trust-item::before {
  content: '';
  position: absolute;
  inset-inline-start: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--about-orange);
  opacity: 0;
  transition: opacity 0.25s;
}

.page-about .trust-item:hover {
  border-color: rgba(255, 107, 53, 0.36);
  box-shadow: 0 8px 24px rgba(11, 11, 15, 0.07);
}

.page-about .trust-item:hover::before {
  opacity: 1;
}

.page-about .trust-item__num {
  display: block;
  font-family: var(--font-mono, monospace);
  font-size: 0.8125rem;
  letter-spacing: 0.15em;
  color: var(--about-orange);
  margin-bottom: 0.75rem;
}

.page-about .trust-item h3 {
  font-size: 1.25rem;
  font-weight: 800;
  margin: 0 0 0.5rem;
}

.page-about .trust-item p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--about-muted-strong, #535A68);
}

/* ===== 数据流管道 ===== */
.page-about .story-dataflow {
  background: var(--about-mist);
  border-top: 1px solid #d8d8e4;
}

.page-about .dataflow {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.75rem;
  align-items: stretch;
}

.page-about .dataflow__node {
  background: var(--about-space);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: var(--about-radius);
  padding: clamp(1.25rem, 2.5vw, 1.75rem);
  color: #fff;
  position: relative;
  min-height: 92px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.page-about .dataflow__node--core {
  background:
    radial-gradient(circle at 90% 18%, rgba(255, 107, 53, 0.34) 0 42px, transparent 44px),
    var(--about-space-deep);
  border-color: rgba(255, 107, 53, 0.42);
}

.page-about .dataflow__node-label {
  font-size: 1.1875rem;
  font-weight: 800;
  margin-bottom: 0.25rem;
}

.page-about .dataflow__node-sub {
  font-family: var(--font-mono, monospace);
  font-size: 0.8125rem;
  color: var(--about-silver);
  line-height: 1.5;
}

.page-about .dataflow__connector {
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--about-silver);
}

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

.page-about .story-dataflow__note {
  margin: 1.25rem 0 0;
  font-size: 0.875rem;
  color: var(--about-muted);
  line-height: 1.7;
}

/* ===== 底部 CTA ===== */
.page-about .story-cta {
  text-align: center;
  background: #fff;
}

.page-about .story-cta p {
  margin: 0;
  line-height: 2;
  color: var(--about-muted-strong, #535A68);
}

.page-about .story-cta a {
  color: var(--about-orange);
  font-weight: 700;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition:
    border-color 0.2s,
    color 0.2s;
}

.page-about .story-cta a:hover {
  color: var(--about-orange-bright);
  border-color: var(--about-orange);
}

/* 滚动显现 */
.page-about [data-reveal] {
  opacity: 1;
  transform: none;
}

/* ===== 桌面媒体查询 ===== */
@media (min-width: 768px) {
  .page-about .timeline__card--media {
    grid-template-columns: 1fr 1fr;
    align-items: start;
  }

  .page-about .timeline__figure {
    margin: 0;
  }

  .page-about .capability-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .trust-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.5rem;
  }

  .page-about .dataflow {
    grid-template-columns: 1fr auto 1fr auto 1fr;
    gap: 0;
    align-items: center;
  }

  .page-about .dataflow__connector {
    height: auto;
    width: 11%;
    min-width: 46px;
  }
}

@media (min-width: 1024px) {
  .page-about .story-hero {
    padding-block: clamp(2.5rem, 5vw, 4rem) clamp(4rem, 7vw, 6rem);
  }

  .page-about .story-hero__inner {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
  }

  .page-about .story-hero__visual {
    margin-inline: 0;
  }

  .page-about .timeline__card {
    padding: clamp(1.5rem, 2.6vw, 2.25rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .page-about .story-hero__orbit::before,
  .page-about .story-hero__orbit i {
    animation: none;
  }

  .page-about [data-reveal] {
    opacity: 1;
    transform: none;
  }

  .page-about .timeline__detail {
    max-height: none;
    transition: none;
  }

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

.page-about {
  --about-muted-strong: currentColor;
  --about-orange-deep: currentColor;
  --t: inherit;
}