.page-about {
  --about-blue: #00F0FF;
  --about-purple: #B026FF;
  --about-orange: #FF6B00;
  --about-grid: rgba(255, 255, 255, 0.1);
  --about-panel: rgba(16, 16, 31, 0.72);
  background:
    radial-gradient(circle at 85% 12%, rgba(176, 38, 255, 0.07) 0%, transparent 38%),
    radial-gradient(circle at 8% 55%, rgba(0, 240, 255, 0.05) 0%, transparent 32%);
}

.page-about .container {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: 1.25rem;
}

.page-about .breadcrumb {
  padding-top: 1.5rem;
  position: relative;
  z-index: 2;
}

.page-about .breadcrumb__item {
  color: var(--c-gray);
}

.page-about .breadcrumb__link {
  color: var(--c-blue);
  text-decoration: none;
  transition: opacity var(--dur) var(--ease);
}

.page-about .breadcrumb__link:hover {
  opacity: 0.65;
}

/* ===== 01 品牌故事 / 英雄区 ===== */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding-block: var(--space-xl) var(--space-xl);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--about-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--about-grid) 1px, transparent 1px);
  background-size: 44px 44px;
  -webkit-mask-image: linear-gradient(120deg, transparent 10%, #000 100%);
  mask-image: linear-gradient(120deg, transparent 10%, #000 100%);
  opacity: 0.65;
  z-index: 0;
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  top: -90px;
  right: -40px;
  width: 380px;
  height: 380px;
  background: linear-gradient(135deg, var(--c-purple) 0%, transparent 70%);
  clip-path: polygon(0 0, 100% 0, 85% 100%, 15% 100%);
  opacity: 0.12;
  z-index: 0;
  pointer-events: none;
  animation: pageAboutGlow 14s ease-in-out infinite alternate;
}

.page-about .about-hero__layout {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

.page-about .about-hero__rail {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 1rem;
  padding: 0.5rem 0 0.5rem 1rem;
  border-left: 3px solid var(--c-blue);
}

.page-about .about-hero__big-num {
  font-size: clamp(3rem, 10vw, 6rem);
  line-height: 0.9;
  color: var(--c-blue);
  opacity: 0.75;
  letter-spacing: -0.06em;
  font-weight: 700;
}

.page-about .about-hero__content {
  max-width: 100%;
}

.page-about .about-hero__eyebrow {
  color: var(--c-purple);
  font-size: 0.8rem;
  letter-spacing: 0.16em;
  margin-bottom: 0.75rem;
  text-transform: uppercase;
}

.page-about .about-hero h1 {
  font-family: var(--font-head);
  font-size: clamp(2.1rem, 6vw, 4rem);
  line-height: 1.02;
  letter-spacing: -0.02em;
  margin: 0 0 0.65rem;
}

.page-about .about-hero__lead {
  font-family: var(--font-head);
  font-size: clamp(1.05rem, 2.4vw, 1.55rem);
  color: var(--c-gray);
  line-height: 1.35;
  margin-bottom: var(--space-md);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.page-about .about-hero__lede {
  color: var(--c-gray);
  font-size: 1.05rem;
  line-height: 1.8;
  max-width: 42em;
  margin-bottom: var(--space-lg);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
  max-width: 560px;
}

.page-about .about-hero__stat {
  position: relative;
  padding: 1rem 1rem 1rem 1.25rem;
  background: linear-gradient(135deg, rgba(16, 16, 31, 0.9) 0%, rgba(16, 16, 31, 0.45) 100%);
  border: 1px solid var(--c-line);
  border-left: 3px solid var(--c-blue);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-hero__stat:hover {
  transform: translateY(-3px);
  border-color: var(--c-blue);
}

.page-about .about-hero__stat-num {
  display: block;
  font-size: clamp(1.35rem, 2.5vw, 1.8rem);
  font-weight: 700;
  color: var(--c-white);
  line-height: 1.15;
  margin-bottom: 0.2rem;
}

/* ===== 02 发展里程碑 ===== */
.page-about .about-milestone {
  position: relative;
  padding-block: var(--space-lg) var(--space-xl);
}

.page-about .about-milestone::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, var(--c-blue-soft) 0%, transparent 30%);
  clip-path: polygon(0 0, 100% 8%, 100% 92%, 0 100%);
  opacity: 0.5;
  pointer-events: none;
}

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

.page-about .about-milestone__head {
  margin-bottom: var(--space-lg);
}

.page-about .about-milestone__head h2 {
  font-size: clamp(1.6rem, 3.4vw, 2.5rem);
  line-height: 1.15;
}

.page-about .about-milestone__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

.page-about .about-milestone__media-wrap {
  display: flex;
}

.page-about .about-milestone__media {
  width: 100%;
  height: 100%;
  min-height: 220px;
  aspect-ratio: auto;
  border: 1px solid var(--c-line);
  overflow: hidden;
}

.page-about .about-milestone__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.85) contrast(1.05);
}

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

.page-about .milestone-list::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--c-blue) 0%, var(--c-purple) 45%, transparent 95%);
  opacity: 0.55;
}

.page-about .milestone-list__item {
  position: relative;
  padding: 0 0 1.75rem 2.25rem;
}

.page-about .milestone-list__item:last-child {
  padding-bottom: 0;
}

.page-about .milestone-list__mark {
  position: absolute;
  left: 0;
  top: 0.45rem;
  width: 16px;
  height: 16px;
  background: var(--c-black);
  border: 2px solid var(--c-blue);
  transform: rotate(45deg);
  box-shadow: 0 0 0 3px var(--c-blue-soft), 0 0 14px var(--c-blue);
  transition: background var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .milestone-list__item:hover .milestone-list__mark {
  background: var(--c-blue);
  transform: rotate(45deg) scale(1.18);
}

.page-about .milestone-list__body {
  background: var(--about-panel);
  border: 1px solid var(--c-line);
  padding: 1.1rem 1.25rem;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .milestone-list__body:hover {
  border-color: var(--c-blue);
  background: rgba(16, 16, 31, 0.9);
  transform: translateX(4px);
}

.page-about .milestone-list__step {
  display: inline-block;
  color: var(--c-purple);
  font-size: 0.85rem;
  letter-spacing: 0.12em;
  margin-bottom: 0.4rem;
}

.page-about .milestone-list__body h3 {
  font-size: 1.15rem;
  margin: 0 0 0.4rem;
  font-weight: 700;
  color: var(--c-white);
}

.page-about .milestone-list__body p {
  margin: 0;
  color: var(--c-gray);
  font-size: 0.95rem;
  line-height: 1.65;
}

.page-about .milestone-list__item:last-child .milestone-list__body {
  border-color: rgba(176, 38, 255, 0.4);
}

/* ===== 03 数据透明制度 ===== */
.page-about .about-data {
  padding-block: var(--space-xl) var(--space-lg);
}

.page-about .about-data__head {
  margin-bottom: var(--space-lg);
}

.page-about .about-data__head h2 {
  font-size: clamp(1.6rem, 3.4vw, 2.5rem);
  line-height: 1.15;
}

.page-about .about-data__accent {
  color: var(--c-blue);
  text-shadow: 0 0 24px rgba(0, 240, 255, 0.35);
}

.page-about .about-data__desc {
  margin-top: 0.9rem;
  max-width: 42em;
}

.page-about .about-data__feature {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
  align-items: stretch;
}

.page-about .about-data__visual {
  display: flex;
}

.page-about .about-data__media {
  width: 100%;
  min-height: 240px;
  aspect-ratio: auto;
  border: 1px solid var(--c-line);
  overflow: hidden;
}

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

.page-about .about-data__cards {
  display: grid;
  gap: 1rem;
}

.page-about .data-card {
  position: relative;
  overflow: hidden;
  padding: 1.5rem;
  background: linear-gradient(135deg, rgba(16, 16, 31, 0.9) 0%, rgba(16, 16, 31, 0.55) 100%);
  border: 1px solid var(--c-line);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .data-card::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--c-blue), var(--c-purple));
  opacity: 0;
  transition: opacity var(--dur) var(--ease);
}

.page-about .data-card:hover {
  transform: translateX(6px);
  border-color: rgba(0, 240, 255, 0.45);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
}

.page-about .data-card:hover::after {
  opacity: 1;
}

.page-about .data-card__top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.8rem;
}

.page-about .data-card__value {
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--c-white);
  line-height: 1;
}

.page-about .data-card h3 {
  font-size: 1.1rem;
  margin: 0 0 0.5rem;
  color: var(--c-white);
}

.page-about .data-card p {
  margin: 0;
  color: var(--c-gray);
  font-size: 0.95rem;
  line-height: 1.7;
}

.page-about .data-card__more {
  margin-top: 0.8rem;
  padding-top: 0.6rem;
  border-top: 1px dashed var(--c-line);
  color: var(--c-gray);
  letter-spacing: 0.08em;
  opacity: 0.6;
  transition: opacity var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .data-card:hover .data-card__more {
  opacity: 1;
  color: var(--c-blue);
}

/* ===== 04 品牌承诺 ===== */
.page-about .about-promise {
  position: relative;
  overflow: hidden;
  padding-block: var(--space-xl) var(--space-xl);
}

.page-about .about-promise__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.page-about .about-promise__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(10, 10, 18, 0.94) 0%, rgba(10, 10, 18, 0.78) 60%, rgba(10, 10, 18, 0.94) 100%),
    repeating-linear-gradient(135deg, rgba(0, 240, 255, 0.03) 0 1px, transparent 1px 18px);
}

.page-about .about-promise__bg img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.7);
}

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

.page-about .about-promise__head {
  margin-bottom: var(--space-lg);
}

.page-about .about-promise__head h2 {
  font-size: clamp(1.6rem, 3.4vw, 2.5rem);
  line-height: 1.15;
}

.page-about .about-promise__grid {
  display: grid;
  gap: 1rem;
  max-width: 820px;
}

.page-about .about-promise__item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1.25rem;
  padding: 1.4rem 1.5rem;
  background: rgba(16, 16, 31, 0.72);
  border: 1px solid var(--c-line);
  border-left: 3px solid var(--c-orange);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .about-promise__item:hover {
  background: rgba(16, 16, 31, 0.94);
  border-color: var(--c-orange);
  transform: translateX(5px);
}

.page-about .about-promise__num {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--c-orange);
  line-height: 1;
}

.page-about .about-promise__item h3 {
  font-size: 1.15rem;
  margin: 0 0 0.35rem;
  color: var(--c-white);
}

.page-about .about-promise__item p {
  margin: 0;
  color: var(--c-gray);
  line-height: 1.65;
  font-size: 0.95rem;
}

.page-about .about-promise__cta {
  margin-top: var(--space-lg);
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

/* ===== 05 团队理念 / 收尾 ===== */
.page-about .about-belief {
  padding-block: var(--space-xl) var(--space-xl);
}

.page-about .about-belief__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

.page-about .about-belief__aside {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  border-left: 2px solid var(--c-purple);
  padding-left: 1rem;
}

.page-about .about-belief__main h2 {
  font-size: clamp(1.6rem, 3.6vw, 2.6rem);
  line-height: 1.15;
  margin: 0 0 var(--space-md);
}

.page-about .about-belief__text {
  color: var(--c-gray);
  line-height: 1.8;
  max-width: 54em;
  margin-bottom: var(--space-lg);
}

.page-about .about-belief__principles {
  display: grid;
  gap: 0.65rem;
  margin-bottom: var(--space-lg);
}

.page-about .about-belief__principle {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  padding: 0.9rem 1rem;
  background: rgba(16, 16, 31, 0.55);
  border: 1px solid var(--c-line);
  color: var(--c-white);
  font-weight: 600;
}

.page-about .about-belief__principle span {
  color: var(--c-purple);
  font-weight: 400;
}

.page-about .about-belief__links {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.75rem;
  margin-bottom: var(--space-md);
}

.page-about .about-belief__link {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  padding: 1rem 1.1rem;
  background: rgba(16, 16, 31, 0.55);
  border: 1px solid var(--c-line);
  border-left: 3px solid var(--c-blue);
  color: var(--c-white);
  text-decoration: none;
  font-weight: 600;
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .about-belief__link:hover {
  border-color: var(--c-blue);
  background: rgba(16, 16, 31, 0.9);
  transform: translateX(4px);
}

.page-about .about-belief__note {
  border-top: 1px solid var(--c-line);
  padding-top: 1rem;
  margin: 0;
}

/* ===== 动画 ===== */
@keyframes pageAboutGlow {
  from {
    transform: translate3d(0, 0, 0);
  }
  to {
    transform: translate3d(-24px, 18px, 0);
  }
}

/* ===== 平板 ===== */
@media (min-width: 768px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, 1fr);
    max-width: none;
  }

  .page-about .about-milestone__grid {
    grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
    gap: var(--space-lg);
  }

  .page-about .about-milestone__media-wrap {
    display: flex;
  }

  .page-about .about-data__feature {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  }

  .page-about .about-data__visual {
    display: flex;
  }

  .page-about .about-promise__grid {
    grid-template-columns: 1fr;
    max-width: 760px;
  }

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

/* ===== 桌面 ===== */
@media (min-width: 992px) {
  .page-about .about-hero__layout {
    grid-template-columns: minmax(0, 0.32fr) minmax(0, 0.68fr);
    gap: var(--space-xl);
  }

  .page-about .about-hero__rail {
    flex-direction: column;
    align-items: flex-start;
    padding-left: 1.5rem;
  }

  .page-about .about-milestone__grid {
    grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
    gap: var(--space-xl);
    align-items: start;
  }

  .page-about .about-milestone__head {
    display: grid;
    grid-template-columns: minmax(0, 0.32fr) minmax(0, 0.68fr);
    gap: var(--space-xl);
  }

  .page-about .about-data__head {
    display: grid;
    grid-template-columns: minmax(0, 0.32fr) minmax(0, 0.68fr);
    gap: var(--space-xl);
  }

  .page-about .about-data__feature {
    grid-template-columns: minmax(0, 0.78fr) minmax(0, 1.22fr);
    gap: var(--space-xl);
  }

  .page-about .about-promise__grid {
    grid-template-columns: repeat(3, 1fr);
    max-width: 920px;
  }

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

  .page-about .about-promise__head {
    display: grid;
    grid-template-columns: minmax(0, 0.32fr) minmax(0, 0.68fr);
    gap: var(--space-xl);
  }

  .page-about .about-belief__grid {
    grid-template-columns: minmax(0, 0.32fr) minmax(0, 0.68fr);
    gap: var(--space-xl);
  }

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

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

/* ===== 大屏 ===== */
@media (min-width: 1280px) {
  .page-about .about-hero__layout {
    gap: calc(var(--space-xl) * 1.4);
  }

  .page-about .about-data__feature {
    gap: calc(var(--space-xl) * 1.4);
  }

  .page-about .about-milestone__grid {
    gap: calc(var(--space-xl) * 1.4);
  }
}