.page-about {
  --about-gap: clamp(64px, 9vw, 112px);
  --about-lime: var(--c-lime);
  --about-orange: var(--c-orange);
  background: var(--c-bg);
  color: var(--c-text);
  position: relative;
  overflow-x: clip;
}

/* ========== Hero ========== */
.page-about .about-hero {
  position: relative;
  padding: 44px 0 72px;
}
.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -80px;
  right: -120px;
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, rgba(198, 244, 50, 0.16), transparent 70%);
  pointer-events: none;
}
.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 56px;
  background: linear-gradient(100deg, transparent 15%, rgba(255, 107, 26, 0.16), rgba(198, 244, 50, 0.24), transparent 85%);
  transform: skewY(-2deg);
  pointer-events: none;
  z-index: 0;
}
.page-about .about-hero .speed-lines {
  position: absolute;
  inset: 0;
  opacity: 0.7;
  z-index: 0;
  pointer-events: none;
}
.page-about .about-hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}
.page-about .about-hero-kicker {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--about-lime);
  margin-bottom: 20px;
}
.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(28px, 5.2vw, 52px);
  line-height: 1.14;
  color: var(--c-text);
  margin: 0 0 20px;
  max-width: 820px;
}
.page-about .hero-accent-word {
  color: var(--about-lime);
  font-weight: inherit;
}
.page-about .about-hero-lead {
  font-size: 16px;
  line-height: 1.78;
  color: var(--c-text-dim);
  max-width: 640px;
  margin: 0 0 30px;
}
.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

/* Hero 目录卡 */
.page-about .about-hero-aside {
  padding: 26px 28px;
  border: 1px solid rgba(184, 212, 240, 0.18);
  border-radius: 20px;
  background: linear-gradient(135deg, rgba(19, 50, 92, 0.72), rgba(11, 30, 54, 0.5));
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}
.page-about .aside-label {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--about-lime);
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(198, 244, 50, 0.18);
}
.page-about .aside-list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-about .aside-list a {
  display: block;
  color: var(--c-text);
  text-decoration: none;
  padding: 11px 4px;
  border-bottom: 1px solid rgba(184, 212, 240, 0.08);
  font-size: 15px;
  transition: color 0.2s, padding-left 0.2s;
}
.page-about .aside-list li:last-child a {
  border-bottom: none;
}
.page-about .aside-list a:hover,
.page-about .aside-list a:focus-visible {
  color: var(--about-lime);
  padding-left: 10px;
}

/* ========== 通用 Section ========== */
.page-about .about-section {
  padding: var(--about-gap) 0;
  position: relative;
}
.page-about .about-section-head {
  margin-bottom: 36px;
  position: relative;
}
.page-about .about-section-num {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(40px, 6vw, 72px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: rgba(198, 244, 50, 0.18);
  margin-bottom: 6px;
}
.page-about .about-section-head h2 {
  font-family: var(--font-display);
  font-size: clamp(24px, 3.4vw, 38px);
  line-height: 1.2;
  color: var(--c-text);
  margin: 0 0 8px;
}
.page-about .about-section-sub {
  color: var(--c-text-dim);
  font-size: 15px;
  line-height: 1.6;
  margin: 0;
}

/* ========== 品牌起源 ========== */
.page-about .origin-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}
.page-about .origin-copy p {
  font-size: 16px;
  line-height: 1.78;
  color: var(--c-text-dim);
  margin: 0 0 16px;
  max-width: 600px;
}
.page-about .origin-quote {
  margin: 26px 0 0;
  padding: 20px 24px;
  border-left: 3px solid var(--about-lime);
  background: linear-gradient(90deg, rgba(198, 244, 50, 0.08), transparent 80%);
}
.page-about .origin-quote p {
  font-family: var(--font-display);
  font-size: 18px;
  color: var(--c-text);
  line-height: 1.5;
  margin: 0 0 8px;
}
.page-about .origin-quote cite {
  font-style: normal;
  font-size: 13px;
  color: var(--about-lime);
}
.page-about .origin-figure {
  margin: 0;
}
.page-about .origin-image {
  width: 100%;
  max-width: 480px;
  height: auto;
  display: block;
  border-radius: 16px;
}
.page-about .origin-figure figcaption {
  font-size: 13px;
  color: var(--c-text-dim);
  margin-top: 12px;
  letter-spacing: 0.06em;
}

/* ========== 发展理念 ========== */
.page-about .about-philosophy {
  background: linear-gradient(180deg, rgba(255, 107, 26, 0.04), rgba(198, 244, 50, 0.04));
  border-top: 1px solid rgba(184, 212, 240, 0.08);
  border-bottom: 1px solid rgba(184, 212, 240, 0.08);
}
.page-about .philosophy-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}
.page-about .philosophy-statement {
  font-family: var(--font-display);
  font-size: clamp(22px, 4vw, 36px);
  line-height: 1.32;
  color: var(--c-text);
  border-left: 4px solid var(--about-lime);
  padding-left: 22px;
  margin: 0 0 22px;
}
.page-about .philosophy-copy {
  color: var(--c-text-dim);
  font-size: 16px;
  line-height: 1.78;
  margin: 0 0 32px;
  max-width: 620px;
}
.page-about .philosophy-principles {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}
.page-about .principle-item {
  background: linear-gradient(135deg, rgba(19, 50, 92, 0.4), rgba(11, 30, 54, 0.6));
  border: 1px solid rgba(184, 212, 240, 0.14);
  border-radius: 14px;
  padding: 20px 22px;
  transition: border-color 0.24s, transform 0.24s;
}
.page-about .principle-item:hover,
.page-about .principle-item:focus-within {
  border-color: rgba(198, 244, 50, 0.42);
  transform: translateX(4px);
}
.page-about .principle-index {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--about-orange);
  margin-bottom: 6px;
}
.page-about .principle-item h3 {
  font-family: var(--font-display);
  font-size: 18px;
  color: var(--c-text);
  margin: 0 0 6px;
}
.page-about .principle-item p {
  font-size: 14px;
  line-height: 1.68;
  color: var(--c-text-dim);
  margin: 0;
}

/* ========== 当季改版对照 ========== */
.page-about .about-comparison-head {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.page-about .comparison-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-bottom: 28px;
}
.page-about .compare-card {
  border-radius: 18px;
  padding: 26px 22px;
  border: 1px solid rgba(184, 212, 240, 0.14);
  transition: border-color 0.25s, box-shadow 0.25s, transform 0.25s;
}
.page-about .compare-old-card {
  background: rgba(4, 16, 31, 0.82);
}
.page-about .compare-card-new {
  background: linear-gradient(135deg, rgba(19, 50, 92, 0.72), rgba(11, 30, 54, 0.42));
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-color: rgba(198, 244, 50, 0.16);
}
.page-about .compare-card:hover {
  border-color: rgba(198, 244, 50, 0.48);
  box-shadow: 0 10px 36px rgba(0, 0, 0, 0.28);
  transform: translateY(-2px);
}
.page-about .compare-card-head {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
}
.page-about .compare-card-head h3 {
  font-family: var(--font-display);
  font-size: 16px;
  line-height: 1.4;
  color: var(--c-text);
  margin: 0;
}
.page-about .compare-status-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--about-orange);
  flex-shrink: 0;
  box-shadow: 0 0 0 4px rgba(255, 107, 26, 0.14);
}
.page-about .compare-status-dot-lime {
  background: var(--about-lime);
  box-shadow: 0 0 0 4px rgba(198, 244, 50, 0.14);
}
.page-about .compare-list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-about .compare-list li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 13px 0;
  border-top: 1px solid rgba(184, 212, 240, 0.12);
  font-size: 14px;
  line-height: 1.6;
  color: var(--c-text-dim);
}
.page-about .compare-list li:first-child {
  border-top: none;
}
.page-about .compare-list li span {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--about-lime);
}
.page-about .compare-vs {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  padding: 4px 0;
}
.page-about .compare-vs::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 1px;
  background: rgba(198, 244, 50, 0.3);
}
.page-about .compare-vs span {
  position: relative;
  background: var(--c-bg);
  padding: 8px 18px;
  font-family: var(--font-display);
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--about-lime);
  border: 1px solid rgba(198, 244, 50, 0.3);
  border-radius: 999px;
}
.page-about .comparison-figure {
  margin: 0 0 28px;
}
.page-about .comparison-image {
  width: 100%;
  max-width: 720px;
  height: auto;
  display: block;
  border-radius: 16px;
}
.page-about .comparison-figure figcaption {
  font-size: 13px;
  color: var(--c-text-dim);
  margin-top: 12px;
  letter-spacing: 0.04em;
}
.page-about .comparison-note {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 22px 0 0;
  border-top: 1px solid rgba(198, 244, 50, 0.2);
}
.page-about .comparison-note p {
  color: var(--c-text-dim);
  font-size: 14px;
  line-height: 1.65;
  margin: 0;
  max-width: 560px;
}

/* ========== 服务里程碑 ========== */
.page-about .about-milestones {
  background: linear-gradient(180deg, var(--c-ink), rgba(11, 30, 54, 0.3));
  border-top: 1px solid rgba(198, 244, 50, 0.18);
}
.page-about .milestone-list {
  position: relative;
  margin-top: 28px;
  padding-left: 36px;
}
.page-about .milestone-list::before {
  content: "";
  position: absolute;
  left: 14px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--about-orange), var(--about-lime));
}
.page-about .milestone-item {
  position: relative;
  padding: 22px 0 22px 20px;
  border-bottom: 1px solid rgba(184, 212, 240, 0.08);
  transition: background 0.24s, transform 0.24s;
}
.page-about .milestone-item:last-child {
  border-bottom: none;
}
.page-about .milestone-item:hover,
.page-about .milestone-item:focus-within {
  background: linear-gradient(90deg, rgba(198, 244, 50, 0.06), transparent 70%);
  transform: translateX(4px);
}
.page-about .milestone-item::before {
  content: "";
  position: absolute;
  left: -27px;
  top: 30px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--about-orange);
  box-shadow: 0 0 0 5px rgba(255, 107, 26, 0.14);
  transition: background 0.2s, box-shadow 0.2s;
}
.page-about .milestone-item:hover::before {
  background: var(--about-lime);
  box-shadow: 0 0 0 7px rgba(198, 244, 50, 0.14);
}
.page-about .milestone-period {
  display: inline-block;
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--about-lime);
  margin-bottom: 6px;
}
.page-about .milestone-item h3 {
  font-family: var(--font-display);
  font-size: 19px;
  line-height: 1.4;
  color: var(--c-text);
  margin: 0 0 8px;
}
.page-about .milestone-item p {
  font-size: 14px;
  line-height: 1.72;
  color: var(--c-text-dim);
  margin: 0;
  max-width: 580px;
}

/* ========== 团队与数据 ========== */
.page-about .team-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
}
.page-about .team-copy p {
  font-size: 15px;
  line-height: 1.78;
  color: var(--c-text-dim);
  margin: 0 0 16px;
}
.page-about .team-note {
  display: inline-block;
  font-size: 13px;
  color: var(--c-text-dim);
  background: rgba(255, 107, 26, 0.08);
  border-left: 3px solid var(--about-orange);
  padding: 10px 16px;
  margin: 6px 0 22px;
  line-height: 1.6;
}
.page-about .team-visual {
  position: relative;
}
.page-about .team-image {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 18px;
}
.page-about .team-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-top: 16px;
}
.page-about .team-stat {
  background: rgba(19, 50, 92, 0.46);
  border: 1px solid rgba(184, 212, 240, 0.14);
  border-radius: 14px;
  padding: 16px;
  transition: border-color 0.2s, background 0.2s;
}
.page-about .team-stat:hover {
  border-color: rgba(198, 244, 50, 0.46);
  background: rgba(30, 78, 140, 0.3);
}
.page-about .team-stat-num {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(24px, 4vw, 32px);
  line-height: 1.1;
  color: var(--about-lime);
  margin-bottom: 4px;
}
.page-about .team-stat-unit {
  font-size: 0.72em;
  color: var(--about-lime);
}
.page-about .team-stat-label {
  display: block;
  font-size: 13px;
  line-height: 1.45;
  color: var(--c-text-dim);
}

/* ========== 延伸入口 ========== */
.page-about .about-next {
  position: relative;
  padding: 64px 0 80px;
  background: linear-gradient(135deg, rgba(30, 78, 140, 0.22), rgba(4, 16, 31, 0.6));
}
.page-about .about-next-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}
.page-about .about-next-head h2 {
  font-family: var(--font-display);
  font-size: clamp(22px, 3.4vw, 34px);
  line-height: 1.25;
  color: var(--c-text);
  margin: 16px 0 8px;
}
.page-about .about-next-head p {
  color: var(--c-text-dim);
  font-size: 15px;
  line-height: 1.7;
  margin: 0;
  max-width: 460px;
}
.page-about .about-next-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-content: flex-start;
}

/* ========== 响应式：中屏 ========== */
@media (min-width: 768px) {
  .page-about .philosophy-principles {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }
  .page-about .team-stats {
    grid-template-columns: repeat(4, 1fr);
  }
  .page-about .milestone-list {
    padding-left: 44px;
  }
  .page-about .milestone-list::before {
    left: 20px;
  }
  .page-about .milestone-item {
    padding: 26px 0 26px 28px;
  }
  .page-about .milestone-item::before {
    left: -30px;
    width: 14px;
    height: 14px;
    box-shadow: 0 0 0 6px rgba(255, 107, 26, 0.14);
  }
  .page-about .milestone-item:hover::before {
    box-shadow: 0 0 0 8px rgba(198, 244, 50, 0.14);
  }
  .page-about .about-next-links {
    gap: 14px;
  }
}

/* ========== 响应式：桌宽 ========== */
@media (min-width: 992px) {
  .page-about .about-hero {
    padding: 72px 0 96px;
  }
  .page-about .about-hero-grid {
    grid-template-columns: 1.6fr 0.9fr;
    align-items: center;
    gap: 56px;
  }
  .page-about .about-hero-aside {
    justify-self: end;
    width: 100%;
    max-width: 340px;
  }

  .page-about .origin-grid {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 64px;
    align-items: center;
  }
  .page-about .origin-figure {
    justify-self: end;
  }

  .page-about .philosophy-grid {
    grid-template-columns: 0.7fr 1.6fr;
    gap: 64px;
    align-items: start;
  }
  .page-about .philosophy-statement {
    margin-top: 4px;
  }

  .page-about .about-comparison-head {
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-end;
  }
  .page-about .comparison-grid {
    grid-template-columns: 1fr 80px 1fr;
    align-items: stretch;
    gap: 0;
  }
  .page-about .compare-vs {
    height: auto;
  }
  .page-about .compare-vs::before {
    width: 1px;
    height: 100%;
    left: 50%;
    top: 0;
    right: auto;
  }
  .page-about .compare-vs span {
    padding: 12px 0;
    background: var(--c-bg);
  }
  .page-about .comparison-note {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }

  .page-about .team-layout {
    grid-template-columns: 0.9fr 1.1fr;
    gap: 64px;
    align-items: center;
  }

  .page-about .about-next-inner {
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 40px;
  }
  .page-about .about-next-links {
    justify-content: flex-end;
  }
}