.page-about {
  background: var(--kui-ink);
  color: var(--kui-cream);
  font-family: var(--kui-font-body);
  line-height: 1.7;
  overflow-x: hidden;
}

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

.page-about a {
  color: inherit;
}

/* ===== 面包屑 ===== */
.page-about .kui-breadcrumb {
  margin-bottom: 3rem;
  font-size: 0.85rem;
  color: var(--kui-gray);
}

.page-about .kui-breadcrumb a {
  color: rgba(242, 244, 243, 0.6);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.25s ease, border-color 0.25s ease;
}

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

/* ===== 通用章节元素 ===== */
.page-about__section-label {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--kui-font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--kui-gray);
  margin-bottom: 0.75rem;
}

.page-about__section-label-center {
  justify-content: center;
}

.page-about__section-head {
  margin-bottom: 2.5rem;
  max-width: 760px;
}

.page-about__section-head .kui-section__title,
.page-about__origin-copy .kui-section__title,
.page-about__culture .kui-section__title {
  font-family: var(--kui-font-head);
  font-size: 2rem;
  font-weight: 900;
  line-height: 1.25;
  color: var(--kui-cream);
  margin: 0;
}

.page-about__section-head .kui-section__sub {
  margin-top: 0.5rem;
  color: var(--kui-gray);
  font-size: 0.95rem;
  max-width: 680px;
}

/* ===== 英雄区 ===== */
.page-about__hero {
  position: relative;
  padding: 2rem 0 4rem;
  background:
    linear-gradient(135deg, rgba(11, 15, 13, 0.92) 0%, rgba(20, 67, 43, 0.88) 48%, rgba(45, 106, 79, 0.72) 100%),
    var(--kui-ink);
  overflow: hidden;
}

.page-about__hero::before {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(242, 244, 243, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(242, 244, 243, 0.04) 1px, transparent 1px);
  background-size: 48px 48px;
}

.page-about__hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
}

.page-about__hero-kicker {
  font-family: var(--kui-font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--kui-orange);
  margin-bottom: 0.75rem;
}

.page-about__hero-title {
  font-family: var(--kui-font-head);
  font-size: 2.35rem;
  font-weight: 900;
  line-height: 1.2;
  color: var(--kui-cream);
  margin-bottom: 1.25rem;
}

.page-about__hero-title-extra {
  display: block;
  color: var(--kui-yellow);
  font-size: 1.25rem;
  letter-spacing: 0.04em;
  margin-top: 0.375rem;
}

.page-about__hero-lead {
  color: rgba(242, 244, 243, 0.85);
  max-width: 620px;
  font-size: 1rem;
  margin-bottom: 1.75rem;
}

.page-about__hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.page-about__hero-aside {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 1.25rem;
  padding: 2.25rem 1.5rem;
  overflow: hidden;
}

.page-about__hero-aside::before {
  content: '';
  position: absolute;
  top: -10%;
  right: -6%;
  width: 78%;
  height: 120%;
  background: linear-gradient(135deg, rgba(214, 40, 40, 0.78), rgba(247, 127, 0, 0.4));
  clip-path: polygon(22% 0%, 100% 0%, 100% 100%, 0% 100%);
  transform: skewX(-8deg);
  pointer-events: none;
}

.page-about__hero-stamp,
.page-about__hero-facts {
  position: relative;
  z-index: 1;
}

.page-about__hero-stamp {
  width: 9.5rem;
  height: 9.5rem;
  background: rgba(11, 15, 13, 0.74);
  border: 1px solid rgba(242, 244, 243, 0.22);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.25rem;
  transform: rotate(4deg);
  font-family: var(--kui-font-mono);
  color: var(--kui-cream);
  text-align: center;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.35);
}

.page-about__hero-stamp-year {
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  color: var(--kui-orange);
}

.page-about__hero-stamp strong {
  font-size: 2.25rem;
  color: var(--kui-yellow);
  line-height: 1.1;
}

.page-about__hero-facts {
  list-style: none;
  margin: 1rem 0 0;
  padding: 1.25rem 0 0;
  border-top: 1px solid rgba(242, 244, 243, 0.16);
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
}

.page-about__hero-facts li {
  display: flex;
  flex-direction: column;
  gap: 0.125rem;
}

.page-about__hero-facts span {
  font-family: var(--kui-font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  color: var(--kui-gray);
  text-transform: uppercase;
}

.page-about__hero-facts strong {
  font-family: var(--kui-font-mono);
  font-size: 1.15rem;
  color: var(--kui-yellow);
}

/* ===== 01 品牌起源 ===== */
.page-about__origin {
  position: relative;
  padding: 4rem 0;
  background:
    radial-gradient(circle at 18% 20%, rgba(45, 106, 79, 0.22), transparent 42%),
    var(--kui-ink);
}

.page-about__origin-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  align-items: center;
}

.page-about__origin-copy .kui-section__title {
  margin-bottom: 1rem;
}

.page-about__origin-text {
  color: rgba(242, 244, 243, 0.82);
  margin-bottom: 1rem;
  font-size: 0.96rem;
  max-width: 60ch;
}

.page-about__origin-points {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.5rem;
}

.page-about__origin-media {
  margin: 0;
  position: relative;
  border: 1px solid rgba(45, 106, 79, 0.5);
  padding: 0.75rem;
  background: rgba(11, 15, 13, 0.5);
  transform: rotate(-1.2deg);
}

.page-about__origin-media img {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
}

.page-about__origin-media figcaption {
  font-family: var(--kui-font-mono);
  font-size: 0.75rem;
  color: var(--kui-gray);
  padding-top: 0.75rem;
  line-height: 1.6;
}

/* ===== 02 发展里程碑 ===== */
.page-about__milestones {
  position: relative;
  padding: 4rem 0;
  background: rgba(20, 67, 43, 0.32);
  border-top: 1px solid rgba(45, 106, 79, 0.35);
  border-bottom: 1px solid rgba(45, 106, 79, 0.35);
}

.page-about__timeline {
  position: relative;
}

.page-about__timeline::before {
  content: '';
  position: absolute;
  left: 12px;
  top: 0.25rem;
  bottom: 0;
  width: 1px;
  background: linear-gradient(180deg, var(--kui-orange), var(--kui-yellow), rgba(45, 106, 79, 0.4));
}

.page-about__timeline-item {
  position: relative;
  padding-left: 48px;
  padding-bottom: 3rem;
}

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

.page-about__timeline-item::before {
  content: '';
  position: absolute;
  left: 12px;
  top: 0.375rem;
  width: 10px;
  height: 10px;
  background: var(--kui-orange);
  transform: translateX(-50%) rotate(45deg);
  box-shadow: 0 0 0 4px rgba(247, 127, 0, 0.14);
}

.page-about__tl-head {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  margin-bottom: 0.5rem;
}

.page-about__tl-year {
  font-family: var(--kui-font-mono);
  font-size: 0.9rem;
  color: var(--kui-orange);
}

.page-about__tl-ver {
  font-family: var(--kui-font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--kui-yellow);
  border: 1px solid rgba(255, 183, 3, 0.55);
  border-radius: 0;
  padding: 0.1rem 0.5rem;
}

.page-about__tl-body {
  background: rgba(11, 15, 13, 0.5);
  border-left: 2px solid var(--kui-pine-light);
  padding: 1rem 1.25rem;
}

.page-about__tl-body h3 {
  font-family: var(--kui-font-head);
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--kui-cream);
  margin: 0 0 0.375rem;
}

.page-about__tl-body p {
  margin: 0;
  color: rgba(242, 244, 243, 0.75);
  font-size: 0.9rem;
  line-height: 1.6;
}

/* ===== 03 技术架构 ===== */
.page-about__tech {
  position: relative;
  padding: 5rem 0;
  background:
    linear-gradient(rgba(242, 244, 243, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(242, 244, 243, 0.025) 1px, transparent 1px),
    var(--kui-ink);
  background-size: 56px 56px;
}

.page-about__tech-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  margin-top: 1.5rem;
}

.page-about__tech-media {
  margin: 0;
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(45, 106, 79, 0.4);
  background: rgba(11, 15, 13, 0.4);
}

.page-about__tech-media img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about__tech-media figcaption {
  font-family: var(--kui-font-mono);
  font-size: 0.75rem;
  color: var(--kui-gray);
  padding: 0.75rem 1rem;
}

.page-about__tech-content h3 {
  font-family: var(--kui-font-head);
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--kui-orange);
  margin: 1.75rem 0 0.375rem;
}

.page-about__tech-content h3:first-child {
  margin-top: 0;
}

.page-about__tech-content p {
  color: rgba(242, 244, 243, 0.8);
  font-size: 0.92rem;
  margin: 0;
}

.page-about__tech-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin-top: 2.5rem;
}

.page-about__tech-card {
  position: relative;
  background: rgba(20, 67, 43, 0.35);
  border: 1px solid rgba(45, 106, 79, 0.5);
  padding: 1.75rem 1.5rem 1.5rem;
  overflow: hidden;
}

.page-about__tech-card::after {
  content: '';
  position: absolute;
  right: -40px;
  top: -40px;
  width: 120px;
  height: 120px;
  border: 12px solid rgba(214, 40, 40, 0.12);
  transform: rotate(45deg);
}

.page-about__tech-card-index {
  font-family: var(--kui-font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--kui-yellow);
  display: block;
  margin-bottom: 0.75rem;
}

.page-about__tech-card h4 {
  font-family: var(--kui-font-head);
  font-size: 1rem;
  font-weight: 800;
  color: var(--kui-cream);
  margin: 0 0 0.5rem;
}

.page-about__tech-card p {
  margin: 0;
  color: rgba(242, 244, 243, 0.7);
  font-size: 0.88rem;
}

/* ===== 04 团队与文化 ===== */
.page-about__culture {
  position: relative;
  padding: 5rem 0;
  background: linear-gradient(180deg, var(--kui-ink) 0%, rgba(20, 67, 43, 0.85) 100%);
}

.page-about__culture-inner {
  text-align: center;
}

.page-about__culture .kui-section__title {
  margin-bottom: 1rem;
}

.page-about__culture-text {
  color: rgba(242, 244, 243, 0.8);
  max-width: 640px;
  margin: 0 auto 1.25rem;
  font-size: 0.98rem;
}

.page-about__culture-stats {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem 2.5rem;
  margin: 2.5rem 0 2rem;
}

.page-about__culture-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
  padding: 1rem 1.5rem;
  border: 1px solid rgba(242, 244, 243, 0.12);
  background: rgba(11, 15, 13, 0.3);
  min-width: 120px;
}

.page-about__culture-num {
  font-family: var(--kui-font-mono);
  font-size: 2rem;
  font-weight: 700;
  color: var(--kui-yellow);
  line-height: 1.2;
}

.page-about__culture-label {
  font-size: 0.8rem;
  color: var(--kui-gray);
}

.page-about__culture-actions {
  margin-top: 1.5rem;
}

/* ===== 05 用户与市场 ===== */
.page-about__users {
  position: relative;
  padding: 5rem 0;
  background: var(--kui-ink);
}

.page-about__users-copy {
  max-width: 780px;
  margin: 2rem 0 2.5rem;
}

.page-about__users-copy p {
  margin: 0;
  color: rgba(242, 244, 243, 0.82);
}

.page-about__stats-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  border: 1px solid rgba(45, 106, 79, 0.4);
  background: rgba(45, 106, 79, 0.08);
  margin-bottom: 2.5rem;
}

.page-about__stat {
  background: rgba(11, 15, 13, 0.75);
  padding: 1.5rem 1rem;
  text-align: center;
}

.page-about__stat-value {
  display: block;
  font-family: var(--kui-font-mono);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--kui-yellow);
  line-height: 1.2;
}

.page-about__stat-label {
  display: inline-block;
  font-size: 0.78rem;
  color: var(--kui-gray);
  margin-top: 0.375rem;
}

.page-about__users-media {
  margin: 0 0 2.5rem;
}

.page-about__users-media img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border: 1px solid rgba(45, 106, 79, 0.35);
}

.page-about__users-media figcaption {
  font-family: var(--kui-font-mono);
  font-size: 0.75rem;
  color: var(--kui-gray);
  padding-top: 0.625rem;
}

.page-about__users-foot {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  align-items: flex-start;
  border-left: 3px solid var(--kui-red);
  padding-left: 1.5rem;
}

.page-about__users-foot p {
  margin: 0;
  color: rgba(242, 244, 243, 0.82);
  max-width: 640px;
}

/* ===== 响应式布局 ===== */
@media (min-width: 768px) {
  .page-about__hero-title {
    font-size: 3rem;
  }

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

  .page-about__tech-cards {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-about__users-media img {
    aspect-ratio: 8 / 3;
  }
}

@media (min-width: 900px) {
  .page-about__hero-inner {
    grid-template-columns: 1.15fr 0.85fr;
    align-items: center;
  }

  .page-about__hero-title {
    font-size: 3.6rem;
  }

  .page-about__hero-lead {
    font-size: 1.1rem;
  }

  .page-about__origin-grid {
    grid-template-columns: 1.05fr 0.95fr;
    gap: 4rem;
  }

  .page-about__tech-grid {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 3rem;
  }

  /* 时间轴左右交错 */
  .page-about__timeline-item {
    width: 50%;
    box-sizing: border-box;
    padding-left: 0;
    padding-right: 48px;
  }

  .page-about__timeline-item::before {
    left: auto;
    right: 0;
    transform: translateX(50%) rotate(45deg);
  }

  .page-about__timeline-item:nth-child(even) {
    margin-left: 50%;
    padding-right: 0;
    padding-left: 48px;
  }

  .page-about__timeline-item:nth-child(even)::before {
    right: auto;
    left: 0;
    transform: translateX(-50%) rotate(45deg);
  }

  .page-about__timeline-item:nth-child(even) .page-about__tl-body {
    border-right: 2px solid var(--kui-pine-light);
    border-left: 0;
  }

  .page-about__section-head .kui-section__title,
  .page-about__origin-copy .kui-section__title,
  .page-about__culture .kui-section__title {
    font-size: 2.6rem;
  }

  .page-about__users-foot {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

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