.page-about {
  --about-code-bg: #0D192E;
  background: var(--cream);
  color: var(--ink);
}

/* ===== Hero ===== */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  color: var(--cream);
  background:
    radial-gradient(1000px 500px at 88% 8%, rgba(122, 199, 79, 0.14), transparent 60%),
    linear-gradient(135deg, #142139 0%, var(--deep-blue) 52%, #23385C 100%);
  padding: clamp(96px, 12vh, 150px) 0 clamp(60px, 8vw, 100px);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(120deg, transparent 60%, rgba(255, 140, 66, 0.08) 100%),
    radial-gradient(circle at 80% 90%, rgba(122, 199, 79, 0.08), transparent 40%);
  pointer-events: none;
}

.page-about .about-hero__accent {
  position: absolute;
  top: -64px;
  right: -56px;
  width: 280px;
  height: 280px;
  opacity: 0.6;
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 44px;
}

.page-about .about-hero__crumbs {
  display: inline-block;
  padding: 7px 16px;
  border-radius: 999px;
  background: rgba(245, 240, 232, 0.12);
  border: 1px solid rgba(245, 240, 232, 0.18);
  color: rgba(245, 240, 232, 0.72);
  font-size: 13px;
  margin-bottom: clamp(24px, 4vw, 40px);
}

.page-about .about-hero__crumbs a {
  color: var(--cream);
  opacity: 0.85;
}

.page-about .about-hero__crumbs a:hover {
  opacity: 1;
  color: var(--kiwi);
}

.page-about .about-hero .section-kicker {
  color: var(--kiwi);
  margin-bottom: 0;
}

.page-about .about-hero__title {
  margin-top: 14px;
  font-size: clamp(40px, 7vw, 72px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--white);
  max-width: 12em;
}

.page-about .about-hero__lead {
  margin-top: 18px;
  font-size: clamp(18px, 2.4vw, 24px);
  line-height: 1.5;
  color: var(--kiwi);
  font-weight: 600;
}

.page-about .about-hero__desc {
  margin-top: 16px;
  max-width: 56ch;
  color: rgba(245, 240, 232, 0.72);
  font-size: 16px;
  line-height: 1.7;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 32px;
}

.page-about .about-hero__actions .btn--ghost {
  border-color: rgba(245, 240, 232, 0.4);
  color: var(--cream);
}

.page-about .about-hero__stack {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.page-about .stack-card {
  position: relative;
  min-height: 116px;
  padding: 22px 24px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  border-radius: var(--radius);
  background: rgba(245, 240, 232, 0.08);
  border: 1px solid rgba(245, 240, 232, 0.16);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  overflow: hidden;
}

.page-about .stack-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 56px;
  height: 4px;
  border-radius: 0 0 4px 0;
  background: var(--kiwi);
}

.page-about .stack-card--primary {
  grid-column: 1 / -1;
  background: rgba(122, 199, 79, 0.16);
  border-color: rgba(122, 199, 79, 0.5);
}

.page-about .stack-card--accent {
  grid-column: 1 / -1;
  background: rgba(255, 140, 66, 0.16);
  border-color: rgba(255, 140, 66, 0.5);
  min-height: 96px;
}

.page-about .stack-card--accent::before {
  background: var(--orange);
}

.page-about .stack-card__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(30px, 4vw, 42px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--white);
}

.page-about .stack-card--primary .stack-card__num {
  color: var(--kiwi);
}

.page-about .stack-card--accent .stack-card__num {
  color: var(--orange);
}

.page-about .stack-card__label {
  margin-top: 6px;
  font-size: 14px;
  letter-spacing: 0.04em;
  color: rgba(245, 240, 232, 0.78);
}

.page-about .stack-card__meta {
  margin-top: 10px;
  padding-top: 8px;
  border-top: 1px solid rgba(245, 240, 232, 0.14);
  font-size: 12px;
  letter-spacing: 0.03em;
  color: rgba(245, 240, 232, 0.55);
}

/* ===== 品牌故事 ===== */
.page-about .about-origin {
  position: relative;
  background: var(--cream);
  padding: clamp(64px, 8vw, 120px) 0;
}

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

.page-about .about-origin__text .section-title {
  margin-top: 12px;
}

.page-about .about-origin__p {
  margin-top: 16px;
  max-width: 62ch;
  color: var(--ink-soft);
  line-height: 1.75;
}

.page-about .about-origin__quote {
  margin: 24px 0 0;
  padding: 18px 24px;
  border-left: 4px solid var(--kiwi);
  background: rgba(122, 199, 79, 0.08);
  border-radius: 0 12px 12px 0;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 800;
  color: var(--deep-blue);
}

.page-about .about-origin__quote p {
  margin: 0;
}

.page-about .about-origin__values {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
  grid-template-columns: 1fr;
}

.page-about .about-origin__values li {
  display: flex;
  gap: 12px;
  align-items: baseline;
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(138, 155, 171, 0.24);
  border-radius: 12px;
}

.page-about .about-origin__values strong {
  flex: 0 0 56px;
  color: var(--kiwi-deep);
  font-family: var(--font-display);
  font-size: 16px;
}

.page-about .about-origin__values span {
  font-size: 14px;
  color: var(--ink-soft);
}

.page-about .about-origin__keywords {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .about-origin__keywords li {
  padding: 6px 14px;
  border: 1px solid rgba(122, 199, 79, 0.6);
  background: rgba(122, 199, 79, 0.1);
  color: var(--kiwi-deep);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
}

.page-about .about-origin__media {
  position: relative;
  margin: 0;
}

.page-about .about-origin__media::before {
  content: "";
  position: absolute;
  inset: 18px -18px -18px 18px;
  border: 2px solid rgba(122, 199, 79, 0.55);
  border-radius: var(--radius-lg);
  z-index: 0;
}

.page-about .about-origin__media img {
  position: relative;
  z-index: 1;
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-float);
}

.page-about .about-origin__media figcaption {
  position: relative;
  z-index: 1;
  margin-top: 14px;
  font-size: 13px;
  color: var(--gray);
  text-align: right;
}

/* ===== 发展轨迹 ===== */
.page-about .about-journey {
  background: #ECE5D8;
  border-top: 1px solid rgba(138, 155, 171, 0.22);
  border-bottom: 1px solid rgba(138, 155, 171, 0.22);
  padding: clamp(56px, 7vw, 100px) 0 72px;
}

.page-about .about-journey__head {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: space-between;
  align-items: flex-end;
}

.page-about .about-journey__head .section-title {
  margin-top: 12px;
}

.page-about .about-journey__hint {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--gray);
}

.page-about .about-journey__lead {
  max-width: 60ch;
  margin: 16px 0 0;
  color: var(--ink-soft);
  line-height: 1.7;
}

.page-about .journey-scroll {
  display: flex;
  gap: 20px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding: 24px max(var(--gutter), calc((100vw - var(--content-max)) / 2 + var(--gutter))) 28px;
  scrollbar-width: none;
}

.page-about .journey-scroll::-webkit-scrollbar {
  display: none;
}

.page-about .journey-card {
  width: min(82vw, 360px);
  flex: 0 0 auto;
  scroll-snap-align: start;
  scroll-margin-left: var(--gutter);
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 320px;
  padding: 28px 26px;
  background: var(--white);
  border: 1px solid rgba(138, 155, 171, 0.28);
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
}

.page-about .journey-card::before {
  content: "";
  position: absolute;
  top: -12px;
  left: 50%;
  width: 12px;
  height: 12px;
  border-radius: 4px;
  background: var(--orange);
  border: 2px solid rgba(255, 140, 66, 0.25);
  transform: translateX(-50%) rotate(45deg);
}

.page-about .journey-card--current {
  border-top: 3px solid var(--kiwi);
  background:
    linear-gradient(160deg, rgba(122, 199, 79, 0.1), transparent 45%),
    var(--white);
}

.page-about .journey-card__head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
}

.page-about .journey-card__phase {
  display: inline-flex;
  align-items: center;
  padding: 5px 12px;
  border-radius: 999px;
  background: rgba(138, 155, 171, 0.14);
  color: var(--ink-soft);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.page-about .journey-card--current .journey-card__phase {
  background: rgba(122, 199, 79, 0.16);
  color: var(--kiwi-deep);
}

.page-about .journey-card__icon {
  flex: 0 0 44px;
  color: var(--gray);
}

.page-about .journey-card--current .journey-card__icon {
  color: var(--kiwi);
}

.page-about .journey-card__title {
  margin: 18px 0 0;
  font-family: var(--font-display);
  font-size: 22px;
  line-height: 1.3;
  color: var(--deep-blue);
}

.page-about .journey-card__desc {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.65;
  color: var(--ink-soft);
}

.page-about .journey-card__details {
  border-top: 1px dashed rgba(138, 155, 171, 0.35);
  margin-top: 18px;
  padding-top: 12px;
}

.page-about .journey-card__details summary {
  list-style: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--kiwi-deep);
}

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

.page-about .journey-card__details summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--orange);
  transition: transform 0.2s ease;
}

.page-about .journey-card__details[open] summary::after {
  transform: rotate(45deg);
}

.page-about .journey-card__list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: grid;
  gap: 6px;
}

.page-about .journey-card__list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.5;
  color: var(--ink-soft);
}

.page-about .journey-card__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--kiwi);
  transform: rotate(45deg);
}

/* ===== 平台规模 ===== */
.page-about .about-scale {
  background: linear-gradient(135deg, var(--deep-blue), #13213A);
  color: var(--cream);
  padding: clamp(64px, 8vw, 120px) 0;
}

.page-about .about-scale .section-title {
  color: var(--white);
}

.page-about .about-scale .section-kicker {
  color: var(--kiwi);
}

.page-about .about-scale__intro {
  display: grid;
  gap: 14px;
}

.page-about .about-scale__lead {
  max-width: 72ch;
  margin-top: 14px;
  color: rgba(245, 240, 232, 0.7);
  line-height: 1.75;
}

.page-about .scale-band {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 44px;
}

.page-about .scale-band__item {
  position: relative;
  padding: 30px 26px;
  border-radius: 18px;
  background: rgba(245, 240, 232, 0.06);
  border: 1px solid rgba(245, 240, 232, 0.14);
  overflow: hidden;
}

.page-about .scale-band__item::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--kiwi), transparent);
}

.page-about .scale-band__item--primary {
  background: rgba(122, 199, 79, 0.1);
  border-color: rgba(122, 199, 79, 0.4);
}

.page-about .scale-band__item--accent {
  background: rgba(255, 140, 66, 0.1);
  border-color: rgba(255, 140, 66, 0.4);
}

.page-about .scale-band__item--accent::after {
  background: linear-gradient(90deg, var(--orange), transparent);
}

.page-about .scale-band__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(32px, 4vw, 46px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--kiwi);
}

.page-about .scale-band__item--accent .scale-band__num {
  color: var(--orange);
}

.page-about .scale-band__label {
  display: block;
  margin-top: 8px;
  font-size: 14px;
  letter-spacing: 0.04em;
  color: rgba(245, 240, 232, 0.72);
}

.page-about .about-scale__note {
  margin: 30px 0 0;
  padding-left: 18px;
  border-left: 3px solid var(--kiwi);
  color: rgba(245, 240, 232, 0.64);
  font-size: 15px;
  line-height: 1.7;
}

/* ===== 技术核心 ===== */
.page-about .about-tech {
  background: var(--white);
  padding: clamp(64px, 8vw, 120px) 0;
}

.page-about .about-tech__inner {
  display: grid;
  gap: 48px;
  align-items: center;
}

.page-about .about-tech__lead {
  margin-top: 14px;
  color: var(--ink-soft);
  line-height: 1.7;
}

.page-about .tech-step {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .tech-step__item {
  display: flex;
  gap: 18px;
  padding: 20px;
  border-radius: 14px;
  background: rgba(245, 240, 232, 0.7);
  border: 1px solid rgba(138, 155, 171, 0.22);
}

.page-about .tech-step__num {
  flex: 0 0 34px;
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 700;
  color: var(--orange);
  padding-top: 3px;
}

.page-about .tech-step__title {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  color: var(--deep-blue);
}

.page-about .tech-step__desc {
  margin: 6px 0 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--ink-soft);
}

.page-about .about-tech__media {
  position: relative;
  margin: 0;
  padding: 10px;
  border-radius: var(--radius-lg);
  background: var(--about-code-bg);
  border: 1px solid rgba(122, 199, 79, 0.35);
  box-shadow: var(--shadow-float);
}

.page-about .about-tech__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: calc(var(--radius-lg) - 6px);
}

.page-about .about-tech__code {
  position: absolute;
  top: 22px;
  left: 22px;
  z-index: 2;
  padding: 6px 12px;
  border-radius: 8px;
  background: rgba(13, 25, 46, 0.82);
  color: var(--kiwi);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
}

.page-about .about-tech__media figcaption {
  margin-top: 12px;
  padding: 0 4px;
  font-size: 13px;
  color: rgba(245, 240, 232, 0.62);
}

/* ===== 合作生态 ===== */
.page-about .about-partners {
  background: #EFE9DE;
  padding: clamp(64px, 8vw, 120px) 0;
}

.page-about .about-partners .section-title {
  margin-top: 12px;
}

.page-about .about-partners__grid {
  display: grid;
  gap: 36px;
  margin-top: 40px;
  align-items: center;
}

.page-about .about-partners__media {
  position: relative;
  margin: 0;
  overflow: hidden;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(138, 155, 171, 0.3);
  background: var(--white);
  box-shadow: var(--shadow-soft);
}

.page-about .about-partners__media::after {
  content: "";
  position: absolute;
  inset: 10px;
  border: 1px solid rgba(122, 199, 79, 0.45);
  border-radius: calc(var(--radius-lg) - 8px);
  pointer-events: none;
}

.page-about .about-partners__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-partners__media figcaption {
  padding: 12px 16px;
  font-size: 13px;
  color: var(--gray);
}

.page-about .about-partners__lead {
  color: var(--ink-soft);
  line-height: 1.75;
}

.page-about .about-partners__list {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-partners__list li {
  display: grid;
  gap: 6px;
  padding: 16px 20px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid rgba(138, 155, 171, 0.22);
}

.page-about .about-partners__list strong {
  color: var(--deep-blue);
  font-size: 16px;
  font-weight: 700;
}

.page-about .about-partners__list span {
  font-size: 14px;
  color: var(--ink-soft);
  line-height: 1.6;
}

.page-about .about-partners__honor {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin: 24px 0 0;
  font-size: 14px;
  color: var(--ink-soft);
  line-height: 1.6;
}

/* ===== 愿景 ===== */
.page-about .about-vision {
  position: relative;
  overflow: hidden;
  background:
    linear-gradient(160deg, rgba(122, 199, 79, 0.14), transparent 32%),
    linear-gradient(135deg, #142139 0%, var(--deep-blue) 50%, #13243D 100%);
  color: var(--cream);
  padding: clamp(72px, 10vw, 140px) 0;
}

.page-about .about-vision__grid {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 1200px;
  height: 100%;
  opacity: 0.8;
  pointer-events: none;
}

.page-about .about-vision__inner {
  position: relative;
  z-index: 1;
  max-width: 900px;
}

.page-about .about-vision .section-kicker {
  color: var(--kiwi);
}

.page-about .about-vision .section-title {
  color: var(--white);
  margin-top: 12px;
}

.page-about .about-vision__lead {
  margin-top: 18px;
  font-family: var(--font-display);
  font-size: clamp(24px, 3.6vw, 40px);
  line-height: 1.25;
  color: var(--white);
  max-width: 22ch;
}

.page-about .about-vision__text {
  margin-top: 18px;
  max-width: 60ch;
  color: rgba(245, 240, 232, 0.74);
  line-height: 1.75;
}

.page-about .about-vision__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 32px;
}

.page-about .about-vision__cta .btn--ghost {
  border-color: rgba(245, 240, 232, 0.45);
  color: var(--cream);
}

/* ===== 桌面增强 ===== */
@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: 1.05fr 0.95fr;
    gap: clamp(40px, 6vw, 80px);
    align-items: center;
  }

  .page-about .about-hero__stack {
    gap: 18px;
  }

  .page-about .about-hero__stack .stack-card--offset {
    margin-top: 22px;
  }

  .page-about .about-hero__stack .stack-card {
    min-height: 128px;
  }

  .page-about .about-origin__grid {
    grid-template-columns: 1.05fr 0.95fr;
    gap: clamp(40px, 6vw, 88px);
  }

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

  .page-about .about-scale__intro {
    grid-template-columns: 0.8fr 1.2fr;
    align-items: end;
  }

  .page-about .about-scale__lead {
    margin-top: 0;
  }

  .page-about .scale-band {
    grid-template-columns: 1.15fr 1fr 1fr 1fr;
  }

  .page-about .about-tech__inner {
    grid-template-columns: 0.95fr 1.05fr;
    gap: clamp(40px, 6vw, 80px);
  }

  .page-about .about-partners__grid {
    grid-template-columns: 1.1fr 0.9fr;
    gap: clamp(40px, 6vw, 80px);
  }

  .page-about .about-partners__list li {
    grid-template-columns: 96px 1fr;
    gap: 16px;
    align-items: start;
  }

  .page-about .about-vision__inner {
    padding-right: 10%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    scroll-behavior: auto !important;
    transition: none !important;
  }
}