.page-about {
  background: var(--ink);
  color: var(--paper);
  overflow-x: hidden;
}

/* ===== 英雄区 ===== */
.page-about .about-hero {
  position: relative;
  padding: 24px 0 56px;
}

.page-about .about-hero::before {
  content: '';
  position: absolute;
  top: -80px;
  right: -120px;
  width: 520px;
  height: 520px;
  background: radial-gradient(circle, rgba(123, 47, 255, .22) 0%, transparent 70%);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: '';
  position: absolute;
  right: 0;
  top: 0;
  width: 42%;
  height: 100%;
  background: linear-gradient(135deg, transparent 0%, transparent 30%, rgba(57, 255, 136, .05) 100%);
  clip-path: polygon(14% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-about .about-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 40px;
  padding: 28px 0 0;
  position: relative;
}

.page-about .about-hero .container::after {
  content: '';
  display: block;
  height: 3px;
  width: 100%;
  margin-top: 48px;
  background: linear-gradient(90deg, var(--neon) 0%, var(--volt) 45%, transparent 100%);
}

.page-about .about-kicker {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .14em;
  color: var(--neon);
  text-transform: uppercase;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 18px;
}

.page-about .about-kicker::before {
  content: '';
  width: 32px;
  height: 2px;
  background: var(--neon);
  flex: none;
}

.page-about .about-hero h1 {
  font-family: var(--font-head);
  font-size: clamp(34px, 7vw, 72px);
  font-style: italic;
  font-weight: 900;
  line-height: 1.1;
  color: var(--white);
  margin: 0 0 22px;
  letter-spacing: -0.02em;
}

.page-about .about-hero h1 em {
  color: var(--neon);
}

.page-about .about-hero-lede {
  font-size: 17px;
  line-height: 1.75;
  color: var(--paper);
  max-width: 620px;
  margin: 0;
  border-left: 3px solid var(--volt);
  padding-left: 20px;
}

.page-about .about-hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.page-about .about-stat {
  background: var(--ink-2);
  border: 1px solid rgba(123, 47, 255, .35);
  padding: 18px 14px;
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 12px 100%, 0 calc(100% - 12px));
}

.page-about .about-stat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(22px, 3.4vw, 36px);
  font-weight: 700;
  color: var(--gold);
  line-height: 1.2;
}

.page-about .about-stat-label {
  display: block;
  font-size: 13px;
  color: var(--paper);
  margin-top: 6px;
  letter-spacing: .05em;
}

/* ===== 我们是谁 ===== */
.page-about .about-intro {
  border-top: 1px solid rgba(123, 47, 255, .3);
  position: relative;
}

.page-about .about-intro::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: repeating-linear-gradient(-45deg, transparent 0, transparent 20px, rgba(123, 47, 255, .04) 20px, rgba(123, 47, 255, .04) 22px);
  pointer-events: none;
}

.page-about .about-intro-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 36px;
  position: relative;
}

.page-about .about-intro-head {
  border-left: 3px solid var(--volt);
  padding-left: 18px;
}

.page-about .about-slashes {
  color: var(--volt);
  font-size: 15px;
  letter-spacing: .12em;
  margin: 0 0 12px;
}

.page-about .about-intro-body .lead {
  color: var(--white);
  font-size: 19px;
  line-height: 1.8;
  margin-top: 0;
}

.page-about .about-intro-body > p:not(.lead) {
  color: var(--paper);
  line-height: 1.75;
  margin-bottom: 18px;
}

.page-about .about-quote {
  margin: 28px 0;
  padding: 20px 24px;
  border: 1px solid rgba(57, 255, 136, .35);
  border-left: 4px solid var(--neon);
  background: rgba(15, 42, 74, .4);
  color: var(--white);
  font-family: var(--font-head);
  font-size: 20px;
  font-style: italic;
  line-height: 1.5;
}

.page-about .about-intro-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 24px;
}

/* ===== 时间线 ===== */
.page-about .about-milestones {
  background: linear-gradient(170deg, var(--ink-3) 0%, var(--ink) 55%, var(--ink-2) 100%);
}

.page-about .about-milestone-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
}

.page-about .about-milestone-head-text .section-title {
  margin-bottom: 12px;
}

.page-about .about-milestone-desc {
  color: var(--paper);
  line-height: 1.7;
  max-width: 460px;
  margin: 0;
}

.page-about .about-milestone-visual {
  position: relative;
}

.page-about .about-milestone-visual img,
.page-about .about-data-visual img,
.page-about .about-tech-sync-visual img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid rgba(123, 47, 255, .35);
}

.page-about .about-milestone-visual::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(123, 47, 255, .14) 0%, rgba(57, 255, 136, .05) 100%);
  pointer-events: none;
}

.page-about .about-timeline {
  margin-top: 44px;
  position: relative;
  padding-left: 8px;
}

.page-about .about-timeline::before {
  content: '';
  position: absolute;
  left: 30px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--neon) 0%, var(--volt) 100%);
  opacity: .4;
}

.page-about .about-timeline-item {
  position: relative;
  padding: 0 0 30px 52px;
}

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

.page-about .about-timeline-item::before {
  content: '';
  position: absolute;
  left: 24px;
  top: 8px;
  width: 12px;
  height: 12px;
  background: var(--ink);
  border: 3px solid var(--neon);
  transform: rotate(45deg);
  z-index: 1;
}

.page-about .about-timeline-year {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  color: var(--gold);
  margin-bottom: 6px;
  line-height: 1;
}

.page-about .about-timeline-content {
  background: rgba(15, 42, 74, .55);
  border-left: 2px solid var(--volt);
  padding: 16px 18px;
  transition: border-color .3s ease, background .3s ease;
}

.page-about .about-timeline-content:hover {
  border-color: var(--neon);
  background: rgba(15, 42, 74, .85);
}

.page-about .about-timeline-content h3 {
  color: var(--white);
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 900;
  margin: 0 0 8px;
}

.page-about .about-timeline-content p {
  color: var(--paper);
  font-size: 15px;
  line-height: 1.7;
  margin: 0;
}

/* ===== 数据与覆盖 ===== */
.page-about .about-data-head {
  margin-bottom: 28px;
}

.page-about .about-data-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
}

.page-about .about-data-points {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.page-about .about-data-item {
  background: linear-gradient(135deg, rgba(15, 42, 74, .75), rgba(26, 11, 46, .5));
  border: 1px solid rgba(123, 47, 255, .3);
  padding: 20px 16px;
  position: relative;
}

.page-about .about-data-item::after {
  content: '';
  position: absolute;
  right: 0;
  bottom: 0;
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 0 0 30px 30px;
  border-color: transparent transparent var(--neon) transparent;
  opacity: .12;
}

.page-about .about-data-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 38px;
  font-weight: 700;
  color: var(--neon);
  line-height: 1.1;
}

.page-about .about-data-unit {
  font-size: 18px;
  color: var(--gold);
  font-weight: 400;
}

.page-about .about-data-label {
  display: block;
  color: var(--white);
  font-family: var(--font-head);
  font-size: 15px;
  font-weight: 700;
  margin-top: 10px;
}

.page-about .about-data-item p {
  color: var(--paper);
  font-size: 13px;
  line-height: 1.65;
  margin: 8px 0 0;
}

.page-about .about-data-visual {
  align-self: start;
}

.page-about .about-data-caption {
  color: var(--paper);
  font-size: 13px;
  text-align: center;
  margin: 12px 0 0;
  font-family: var(--font-mono);
  letter-spacing: .04em;
}

/* ===== 技术保障 ===== */
.page-about .about-tech {
  background: linear-gradient(180deg, var(--ink) 0%, var(--ink-3) 100%);
}

.page-about .about-tech-head {
  margin-bottom: 28px;
}

.page-about .about-tech-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}

.page-about .about-tech-card {
  background: linear-gradient(135deg, rgba(15, 42, 74, .8), rgba(26, 11, 46, .55));
  border: 1px solid rgba(123, 47, 255, .3);
  padding: 24px 22px;
  transition: border-color .3s ease, transform .3s ease;
}

.page-about .about-tech-card:hover {
  border-color: var(--neon);
  transform: translateY(-4px);
}

.page-about .about-tech-icon {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--volt);
  border: 1px solid var(--volt);
  padding: 4px 10px;
  letter-spacing: .08em;
  display: inline-block;
}

.page-about .about-tech-card h3 {
  color: var(--white);
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 900;
  margin: 18px 0 10px;
}

.page-about .about-tech-card p {
  color: var(--paper);
  font-size: 15px;
  line-height: 1.7;
  margin: 0;
}

.page-about .about-tech-sync {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  margin-top: 48px;
  border-top: 1px solid rgba(123, 47, 255, .3);
  padding-top: 40px;
}

.page-about .about-tech-sync-text h3 {
  color: var(--white);
  font-family: var(--font-head);
  font-size: 28px;
  font-style: italic;
  font-weight: 900;
  margin: 0 0 12px;
}

.page-about .about-tech-sync-text p {
  color: var(--paper);
  line-height: 1.75;
  margin: 0 0 22px;
}

.page-about .about-tech-sync-visual {
  align-self: center;
}

/* ===== 底部CTA ===== */
.page-about .about-cta-inner {
  background: linear-gradient(120deg, var(--volt) 0%, var(--ink-3) 100%);
  padding: 48px 28px;
  text-align: center;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%);
}

.page-about .about-cta-inner h2 {
  color: var(--white);
  font-family: var(--font-head);
  font-size: clamp(26px, 4vw, 36px);
  font-weight: 900;
  font-style: italic;
  margin: 0 0 12px;
}

.page-about .about-cta-inner p {
  color: var(--paper);
  font-size: 16px;
  line-height: 1.6;
  margin: 0 0 28px;
}

.page-about .about-cta-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
}

/* ===== 桌面端 ===== */
@media (min-width: 768px) {
  .page-about .about-hero {
    padding: 40px 0 64px;
  }

  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1fr) 280px;
    gap: 48px;
    align-items: end;
  }

  .page-about .about-hero h1 {
    font-size: clamp(48px, 6vw, 72px);
  }

  .page-about .about-intro-grid {
    grid-template-columns: minmax(0, 280px) minmax(0, 1fr);
    gap: 48px;
    align-items: start;
  }

  .page-about .about-intro-head {
    position: sticky;
    top: 32px;
  }

  .page-about .about-milestone-head {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: center;
    gap: 40px;
  }

  .page-about .about-timeline-item:nth-child(n+3) .about-timeline-content {
    margin-left: 48px;
  }

  .page-about .about-timeline-item:nth-child(n+5) .about-timeline-content {
    margin-left: 96px;
  }

  .page-about .about-data-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 40px;
    align-items: start;
  }

  .page-about .about-data-points {
    gap: 16px;
  }

  .page-about .about-tech-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
  }

  .page-about .about-tech-sync {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 48px;
    align-items: center;
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1fr) 320px;
  }

  .page-about .about-stat {
    padding: 24px 20px;
  }

  .page-about .about-tech-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-data-item {
    padding: 24px 20px;
  }

  .page-about .about-data-num {
    font-size: 44px;
  }
}

@media (min-width: 1280px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1fr) 360px;
  }
}