.page-about {
  --about-green: #00FF88;
  --about-orange: #FF5E00;
  --about-panel: #14243D;
  --about-panel-light: #1E2E4A;
  --about-border: #2A4A6A;
  --about-muted: #A0AABF;
  position: relative;
  background: #0A1428;
  color: #F5F7FA;
  overflow-x: clip;
  padding-bottom: 72px;
}

/* 面包屑已在共享层定义，仅做间距补偿 */
.page-about .breadcrumb {
  padding-top: 24px;
}

/* ── 首屏 Hero ─────────────────────── */
.page-about .about-hero {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  padding: 32px 0 48px;
  position: relative;
}

.page-about .about-hero__kicker {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 2px;
  color: var(--about-green);
  border-left: 3px solid var(--about-orange);
  padding-left: 12px;
  margin: 0 0 10px;
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-size: 36px;
  line-height: 1.18;
  letter-spacing: 1px;
  margin: 0 0 16px;
  text-transform: uppercase;
}

.page-about .about-hero__lead {
  font-size: 20px;
  font-weight: 600;
  line-height: 1.5;
  margin: 0 0 12px;
  color: #F5F7FA;
}

.page-about .about-hero__desc {
  font-size: 16px;
  line-height: 1.75;
  color: var(--about-muted);
  max-width: 540px;
  margin: 0 0 20px;
}

.page-about .about-hero__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .about-hero__figure {
  position: relative;
  margin: 0;
  border: 1px solid rgba(0, 255, 136, 0.4);
  border-radius: 8px;
  background: #0F1E38;
  transform: perspective(600px) rotateY(2deg) rotateZ(0.6deg);
  box-shadow: 0 0 24px rgba(0, 255, 136, 0.10), 14px 14px 0 rgba(255, 94, 0, 0.14);
  overflow: hidden;
}

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

.page-about .about-hero__wave {
  position: absolute;
  top: -8px;
  right: 4px;
  width: 180px;
  height: auto;
  z-index: 2;
  pointer-events: none;
  opacity: 0.9;
}

/* ── 品牌手册版式：左索引 + 右正文 ── */
.page-about .about-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  margin-top: 8px;
}

.page-about .about-index {
  position: relative;
  top: auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  background: rgba(20, 36, 61, 0.72);
  border: 1px solid var(--about-border);
  border-radius: 6px;
  padding: 14px;
}

.page-about .about-index__label {
  width: 100%;
  margin: 0 0 2px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 1px;
  color: var(--about-muted);
}

.page-about .about-index__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: #F5F7FA;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: 4px;
  padding: 8px 10px;
  transition: border-color 0.2s ease, color 0.2s ease, background 0.2s ease;
}

.page-about .about-index__num {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--about-green);
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  color: var(--about-green);
  border-color: var(--about-border);
  background: rgba(0, 255, 136, 0.06);
}

/* ── 章节通用 ─────────────────────── */
.page-about .about-section {
  position: relative;
  padding: 44px 0 16px;
  border-top: 1px solid rgba(42, 74, 106, 0.55);
}

.page-about .about-section[id] {
  scroll-margin-top: 88px;
}

.page-about .about-section::before {
  content: '';
  position: absolute;
  top: 30px;
  right: 0;
  width: 56px;
  height: 10px;
  border-radius: 2px;
  transform: skewX(-20deg);
}

.page-about .about-section--mission::before {
  background: var(--about-orange);
  width: 48px;
}

.page-about .about-section--metrics::before {
  background: linear-gradient(90deg, var(--about-green), var(--about-orange));
  width: 88px;
}

.page-about .about-section--timeline::before {
  background: var(--about-green);
  width: 64px;
}

.page-about .about-section--cert::before {
  background: linear-gradient(90deg, var(--about-green), #00AA55);
  width: 72px;
}

.page-about .about-section--team::before {
  background: var(--about-orange);
  width: 40px;
}

.page-about .about-section__head {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 20px;
}

.page-about .about-section__code {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 1px;
  color: var(--about-green);
}

.page-about .about-section__head h2 {
  font-family: var(--font-display);
  font-size: 28px;
  line-height: 1.3;
  margin: 0;
}

/* ── 使命 ─────────────────────────── */
.page-about .about-mission__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.page-about .about-mission__body p {
  font-size: 16px;
  line-height: 1.8;
  margin: 0 0 14px;
}

.page-about .about-mission__body .text-muted {
  color: var(--about-muted);
  font-size: 15px;
  border-left: 2px solid var(--about-border);
  padding-left: 14px;
}

.page-about .about-quote {
  background: linear-gradient(145deg, #162A4D, #101F38);
  border: 1px solid rgba(0, 255, 136, 0.25);
  border-radius: 6px;
  margin: 0;
  padding: 22px 20px;
  transform: rotate(-0.6deg);
  box-shadow: 8px 8px 0 rgba(0, 255, 136, 0.08);
}

.page-about .about-quote p {
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 700;
  line-height: 1.3;
  margin: 0 0 8px;
  color: #F5F7FA;
}

.page-about .about-quote span {
  font-size: 14px;
  color: var(--about-muted);
}

/* ── 核心指标 ─────────────────────── */
.page-about .about-metrics__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.page-about .about-stat {
  background: var(--about-panel);
  border: 1px solid var(--about-border);
  border-radius: 6px;
  padding: 18px 14px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.page-about .about-stat:hover {
  border-color: rgba(0, 255, 136, 0.55);
  box-shadow: 0 6px 20px rgba(0, 255, 136, 0.10);
  transform: translateY(-2px);
}

.page-about .about-stat--large {
  background: linear-gradient(145deg, #162A4D, #0E1E38);
  border-color: rgba(0, 255, 136, 0.35);
}

.page-about .about-stat__num {
  font-family: var(--font-mono);
  font-size: 28px;
  line-height: 1.1;
  color: var(--about-green);
  font-weight: 500;
}

.page-about .about-stat__label {
  font-size: 14px;
  color: var(--about-muted);
}

.page-about .about-metrics__extra {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 12px;
}

.page-about .about-extra-card {
  display: flex;
  align-items: baseline;
  gap: 12px;
  background: rgba(30, 46, 74, 0.5);
  border: 1px solid var(--about-border);
  border-radius: 6px;
  padding: 14px 16px;
  flex-wrap: wrap;
}

.page-about .about-extra-card__num {
  font-family: var(--font-mono);
  font-size: 22px;
  color: var(--about-orange);
  font-weight: 500;
  white-space: nowrap;
}

.page-about .about-extra-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.5;
  color: #F5F7FA;
}

.page-about .about-figure {
  margin: 24px 0 0;
  border: 1px solid var(--about-border);
  border-radius: 8px;
  background: #0F1E38;
  padding: 8px;
  transform: perspective(800px) rotateX(1deg) rotateZ(-0.8deg);
}

.page-about .about-figure__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: 4px;
  object-fit: cover;
}

.page-about .about-figure__cap {
  text-align: center;
  font-size: 13px;
  color: var(--about-muted);
  padding: 12px 0 6px;
}

/* ── 发展历程时间线 ───────────────── */
.page-about .about-timeline {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  position: relative;
  display: grid;
  gap: 20px;
}

.page-about .about-timeline::before {
  content: '';
  position: absolute;
  left: 12px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: linear-gradient(180deg, var(--about-green), var(--about-orange));
  opacity: 0.5;
  border-radius: 2px;
}

.page-about .about-timeline__item {
  position: relative;
  padding-left: 44px;
}

.page-about .about-timeline__marker {
  position: absolute;
  left: 4px;
  top: 10px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--about-orange);
  border: 3px solid #0A1428;
  box-shadow: 0 0 0 2px rgba(255, 94, 0, 0.35), 0 0 14px rgba(255, 94, 0, 0.45);
  cursor: default;
}

.page-about .about-timeline__tip {
  position: absolute;
  left: 28px;
  bottom: calc(100% + 10px);
  background: var(--about-panel-light);
  border: 1px solid var(--about-border);
  color: #F5F7FA;
  padding: 5px 10px;
  border-radius: 4px;
  white-space: nowrap;
  font-size: 13px;
  opacity: 0;
  pointer-events: none;
  transform: translateY(4px);
  transition: opacity 0.2s ease, transform 0.2s ease;
  z-index: 4;
}

.page-about .about-timeline__marker:hover .about-timeline__tip,
.page-about .about-timeline__marker:focus .about-timeline__tip {
  opacity: 1;
  transform: translateY(0);
}

.page-about .about-timeline__card {
  background: var(--about-panel);
  border: 1px solid var(--about-border);
  border-radius: 6px;
  padding: 16px 18px;
  transform: rotate(-0.5deg);
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.page-about .about-timeline__item:nth-child(even) .about-timeline__card {
  transform: rotate(0.7deg);
}

.page-about .about-timeline__card:hover {
  transform: rotate(0deg);
  border-color: rgba(0, 255, 136, 0.5);
  box-shadow: 0 8px 24px rgba(0, 255, 136, 0.08);
}

.page-about .about-timeline__version {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  color: var(--about-orange);
  background: rgba(255, 94, 0, 0.1);
  border: 1px solid rgba(255, 94, 0, 0.3);
  border-radius: 4px;
  padding: 2px 8px;
  margin: 0 0 6px;
}

.page-about .about-timeline__name {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  line-height: 1.3;
  margin: 0 0 6px;
}

.page-about .about-timeline__desc {
  font-size: 15px;
  line-height: 1.7;
  color: var(--about-muted);
  margin: 0;
}

/* ── 资质与合作 ───────────────────── */
.page-about .about-cert__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-about .about-cert-card {
  background: linear-gradient(160deg, #14243D, #0F1C33);
  border: 1px solid var(--about-border);
  border-radius: 6px;
  padding: 18px 16px;
  position: relative;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.page-about .about-cert-card:hover {
  border-color: rgba(0, 255, 136, 0.45);
  box-shadow: 0 6px 18px rgba(0, 255, 136, 0.08);
  transform: translateY(-2px);
}

.page-about .about-cert-card__icon {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 500;
  color: var(--about-green);
  border: 1px solid rgba(0, 255, 136, 0.3);
  background: rgba(0, 255, 136, 0.06);
  border-radius: 4px;
  display: inline-block;
  padding: 3px 10px;
  margin-bottom: 12px;
}

.page-about .about-cert-card h3 {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  margin: 0 0 6px;
  line-height: 1.4;
}

.page-about .about-cert-card p {
  font-size: 14px;
  line-height: 1.65;
  color: var(--about-muted);
  margin: 0;
}

/* ── 团队与文化 ───────────────────── */
.page-about .about-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.page-about .about-team__body > p {
  font-size: 16px;
  line-height: 1.8;
  color: var(--about-muted);
  margin: 0 0 20px;
}

.page-about .about-values {
  display: grid;
  gap: 12px;
}

.page-about .about-value {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  background: rgba(20, 36, 61, 0.6);
  border-left: 3px solid var(--about-green);
  border-radius: 0 6px 6px 0;
  padding: 14px 16px;
}

.page-about .about-value__num {
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--about-orange);
  font-weight: 500;
  line-height: 1.5;
}

.page-about .about-value h3 {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  margin: 0 0 4px;
}

.page-about .about-value p {
  font-size: 14px;
  line-height: 1.6;
  color: var(--about-muted);
  margin: 0;
}

.page-about .about-team__figure {
  margin: 0;
  border: 1px solid var(--about-border);
  border-radius: 8px;
  background: #0F1E38;
  padding: 8px;
  transform: rotate(1deg);
}

.page-about .about-team__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: 4px;
  object-fit: cover;
}

/* ── 底部 CTA ─────────────────────── */
.page-about .about-cta {
  margin-top: 56px;
  padding: 32px 24px;
  border: 1px solid rgba(0, 255, 136, 0.35);
  border-radius: 8px;
  background: linear-gradient(135deg, #0F1E38, #14243D 60%, #1A2440);
  box-shadow: 0 0 30px rgba(0, 255, 136, 0.06);
}

.page-about .about-cta h2 {
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 800;
  line-height: 1.3;
  margin: 0 0 10px;
}

.page-about .about-cta p {
  font-size: 15px;
  line-height: 1.75;
  color: var(--about-muted);
  margin: 0 0 20px;
  max-width: 640px;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ── 响应式：平板 ─────────────────── */
@media (min-width: 640px) {
  .page-about .about-hero__title {
    font-size: 42px;
  }

  .page-about .about-section__head h2 {
    font-size: 32px;
  }

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

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

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

  .page-about .about-extra-card {
    flex-direction: column;
    gap: 4px;
  }

  .page-about .about-cta {
    padding: 40px 36px;
  }

  .page-about .about-cta h2 {
    font-size: 30px;
  }
}

/* ── 响应式：桌面 ─────────────────── */
@media (min-width: 960px) {
  .page-about .about-hero {
    grid-template-columns: 1.2fr 0.8fr;
    gap: 48px;
    align-items: center;
    padding: 48px 0 64px;
  }

  .page-about .about-hero__title {
    font-size: 52px;
  }

  .page-about .about-hero__wave {
    width: 260px;
    top: -12px;
    right: -8px;
  }

  .page-about .about-layout {
    grid-template-columns: 240px minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }

  .page-about .about-index {
    position: sticky;
    top: 88px;
    flex-direction: column;
    align-items: stretch;
    padding: 18px;
    gap: 2px;
  }

  .page-about .about-index__label {
    margin-bottom: 10px;
  }

  .page-about .about-index__link {
    justify-content: flex-start;
    padding: 10px 10px;
    font-size: 15px;
  }

  .page-about .about-section--mission {
    padding-top: 48px;
  }

  .page-about .about-mission__grid {
    grid-template-columns: 1.4fr 0.6fr;
    gap: 32px;
    align-items: start;
  }

  .page-about .about-quote {
    margin-top: 4px;
    padding: 26px 22px;
  }

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

  .page-about .about-team__grid {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
  }

  .page-about .about-cta {
    padding: 48px 44px;
  }

  .page-about .about-cta h2 {
    font-size: 32px;
  }
}

/* ── 小屏辅助：避免时间线提示溢出 ── */
@media (max-width: 640px) {
  .page-about .about-timeline__tip {
    display: none;
  }
}