/* =====================================================
   页面：品牌档案  /company/
   作用域：.page-about
   风格：品牌手册式章节 + 技术蓝图坐标系
   ===================================================== */
.page-about {
  --about-border: 2px solid var(--color-ink);
  --about-shadow: 6px 6px 0 rgba(9, 18, 31, 0.9);
  --about-shadow-blue: 6px 6px 0 rgba(46, 111, 242, 0.28);
  background: var(--color-cream);
  overflow-x: clip;
}

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

.page-about figure {
  margin: 0;
}

.page-about figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-grayblue);
}

.page-about section[id] {
  scroll-margin-top: calc(var(--header-h) + 16px);
}

.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--font-display);
  color: var(--color-ink);
  margin: 0;
}

/* ------- 面包屑 ------- */
.page-about__breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-grayblue);
  margin: 0 0 24px;
}

.page-about__breadcrumb a {
  color: var(--color-grayblue);
  text-decoration: none;
  transition: color var(--ease);
}

.page-about__breadcrumb a:hover {
  color: var(--color-cream);
  text-decoration: underline;
}

.page-about__breadcrumb-sep {
  opacity: 0.55;
}

/* ------- Hero 区：技术蓝图背景 + 大标题 ------- */
.page-about__hero {
  position: relative;
  background-color: var(--color-navy);
  background-image:
    radial-gradient(circle at 85% 12%, rgba(46, 111, 242, 0.22), transparent 34%),
    linear-gradient(rgba(181, 196, 209, 0.1) 1px, transparent 1px),
    linear-gradient(90deg, rgba(181, 196, 209, 0.1) 1px, transparent 1px);
  background-size: auto, 36px 36px, 36px 36px;
  color: var(--color-cream);
  padding: 32px 0 56px;
  overflow: hidden;
}

.page-about__hero::after {
  content: "";
  position: absolute;
  right: -70px;
  bottom: -64px;
  width: 260px;
  height: 260px;
  background: var(--color-electric);
  opacity: 0.28;
  transform: rotate(14deg);
  pointer-events: none;
  z-index: 0;
}

.page-about__hero-inner {
  position: relative;
  z-index: 1;
}

.page-about__hero-main {
  padding: 8px 0 0;
}

.page-about__kicker {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--color-orange);
  margin: 0 0 16px;
  text-transform: uppercase;
}

.page-about__hero-title {
  font-size: clamp(32px, 5.4vw, 76px);
  line-height: 1.12;
  letter-spacing: -0.03em;
  font-weight: 900;
  font-family: var(--font-display);
  color: var(--color-cream);
  margin: 0 0 24px;
  text-wrap: balance;
}

.page-about__hero-brand {
  display: block;
  color: var(--color-cream);
}

.page-about__hero-accent {
  display: block;
  color: var(--color-orange);
  transform: skewX(-3deg);
}

.page-about__hero-lead {
  font-size: 17px;
  line-height: 1.85;
  color: rgba(245, 241, 232, 0.85);
  max-width: 680px;
  margin: 0 0 28px;
}

.page-about__hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.page-about__ghost-btn {
  border-color: rgba(245, 241, 232, 0.55);
  color: var(--color-cream);
}

.page-about__ghost-btn:hover,
.page-about__ghost-btn:focus-visible {
  border-color: var(--color-cream);
  background: rgba(245, 241, 232, 0.08);
  color: var(--color-cream);
}

/* ------- Hero 坐标索引 ------- */
.page-about__hero-coords {
  display: grid;
  gap: 12px;
  border-top: 1px solid rgba(181, 196, 209, 0.35);
  padding: 20px 0 4px;
  margin: 36px 0 0;
}

.page-about__coord-item {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  color: var(--color-grayblue);
}

.page-about__coord-key {
  display: block;
  color: var(--color-orange);
  font-weight: 700;
  margin-bottom: 4px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* ------- 章节索引导航 ------- */
.page-about__chapter-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 20px;
  border-top: 1px solid rgba(181, 196, 209, 0.28);
  border-bottom: 1px solid rgba(181, 196, 209, 0.28);
  padding: 14px 0;
  margin: 20px 0 28px;
}

.page-about__chapter-link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-grayblue);
  text-decoration: none;
  padding: 6px 2px;
  border-bottom: 2px solid transparent;
  transition: color var(--ease), border-color var(--ease);
}

.page-about__chapter-num {
  font-weight: 700;
  color: var(--color-orange);
}

.page-about__chapter-link:hover,
.page-about__chapter-link:focus-visible {
  color: var(--color-cream);
  border-bottom-color: var(--color-orange);
}

/* ------- Hero 图 ------- */
.page-about__hero-figure {
  position: relative;
  border: 2px solid var(--color-orange);
  box-shadow: 8px 8px 0 rgba(158, 240, 26, 0.16);
  background: var(--color-darknavy);
  padding: 6px;
  margin: 12px 0 0;
}

.page-about__hero-figure::after {
  content: "DATA FLOW";
  position: absolute;
  top: -12px;
  left: 20px;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--color-navy);
  background: var(--color-neon);
  padding: 4px 8px;
}

.page-about__hero-figure .coords {
  color: var(--color-grayblue);
}

/* ------- 区块通用 ------- */
.page-about__position,
.page-about__milestones,
.page-about__assets,
.page-about__legacy,
.page-about__quality {
  padding-top: 56px;
  padding-bottom: 56px;
}

.page-about__section-head {
  display: grid;
  gap: 14px;
  margin-bottom: 40px;
}

.page-about__section-index {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--color-orange);
  text-transform: uppercase;
  margin: 0 0 8px;
}

.page-about__section-head h2 {
  font-size: clamp(30px, 4vw, 48px);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin: 0;
}

.page-about__section-lead {
  font-size: 14px;
  line-height: 1.8;
  color: #55504a;
  margin: 0;
  max-width: 520px;
}

.page-about__text-lead {
  font-size: 17px;
  line-height: 1.8;
  font-weight: 500;
  color: var(--color-ink);
  margin: 0 0 16px;
}

/* ------- 品牌坐标 ------- */
.page-about__offset-grid {
  display: grid;
  gap: 28px;
}

.page-about__side-note {
  position: relative;
  padding-top: 14px;
}

.page-about__side-note::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 56px;
  height: 6px;
  background: var(--color-orange);
}

.page-about__side-index {
  font-family: var(--font-mono);
  font-size: 56px;
  font-weight: 700;
  line-height: 1;
  color: var(--color-line);
  margin: 0;
  transform: skewX(-8deg);
}

.page-about__side-label {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 800;
  color: var(--color-ink);
  margin: 10px 0 6px;
}

.page-about__side-desc {
  font-size: 13px;
  line-height: 1.7;
  color: #6d675c;
  margin: 0;
}

.page-about__position-main h2 {
  font-size: clamp(28px, 3.4vw, 44px);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin: 0 0 20px;
}

.page-about__position-cols {
  display: grid;
  gap: 16px;
}

.page-about__position-cols p {
  font-size: 14px;
  line-height: 1.9;
  color: #4a463f;
  margin: 0;
}

.page-about__position-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 24px;
}

/* ------- 编年索引 ------- */
.page-about__milestones {
  background: var(--color-pale);
}

.page-about__timeline {
  display: grid;
  gap: 32px;
}

.page-about__timeline-list {
  list-style: none;
  margin: 0;
  padding: 0 0 0 28px;
  border-left: 2px solid var(--color-line);
}

.page-about__timeline-item {
  position: relative;
  padding: 0 0 28px 20px;
}

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

.page-about__timeline-item::before {
  content: "";
  position: absolute;
  left: -35px;
  top: 6px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 3px solid var(--color-orange);
  background: var(--color-pale);
  box-sizing: border-box;
}

.page-about__timeline-year {
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 700;
  color: var(--color-ink);
  margin: 0 0 10px;
}

.page-about__timeline-body {
  background: var(--color-cream);
  border-left: 3px solid var(--color-line);
  border-radius: var(--radius);
  padding: 18px 20px;
  box-shadow: var(--shadow-1);
  transition: transform var(--ease), border-color var(--ease), box-shadow var(--ease);
}

.page-about__timeline-item:hover .page-about__timeline-body {
  transform: translateX(4px);
  border-left-color: var(--color-orange);
  box-shadow: var(--shadow-2);
}

.page-about__timeline-body h3 {
  font-size: 16px;
  font-weight: 700;
  margin: 0 0 8px;
}

.page-about__timeline-body p {
  font-size: 13px;
  line-height: 1.75;
  color: #4a463f;
  margin: 0;
}

.page-about__timeline-figure img {
  border: 2px solid var(--color-ink);
  box-shadow: 8px 8px 0 rgba(11, 30, 51, 0.8);
}

/* ------- 数据资产 ------- */
.page-about__stats-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin: 0 0 40px;
}

.page-about__stat {
  border: var(--about-border);
  background: var(--color-pale);
  padding: 24px 20px;
  box-shadow: var(--about-shadow);
  margin: 0;
  transition: transform var(--ease), box-shadow var(--ease);
}

.page-about__stat:hover {
  transform: translate(-2px, -2px);
  box-shadow: 9px 9px 0 rgba(9, 18, 31, 0.85);
}

.page-about__stat-num {
  font-family: var(--font-mono);
  font-size: 38px;
  font-weight: 700;
  line-height: 1;
  color: var(--color-navy);
  margin: 0 0 12px;
  display: block;
}

.page-about__stat-unit {
  color: var(--color-orange);
  margin-left: 2px;
}

.page-about__stat-body {
  margin: 0;
}

.page-about__stat-body h3 {
  font-size: 15px;
  font-weight: 700;
  margin: 0 0 6px;
}

.page-about__stat-body p {
  font-size: 13px;
  line-height: 1.6;
  color: #4a463f;
  margin: 0;
}

.page-about__assets-bottom {
  display: grid;
  gap: 32px;
}

.page-about__assets-table-title {
  font-size: 16px;
  font-weight: 800;
  margin: 0 0 16px;
}

.page-about__assets-figure img {
  border: 2px solid var(--color-electric);
  box-shadow: var(--about-shadow-blue);
}

/* ------- 旧版对照体系 ------- */
.page-about__legacy {
  background: var(--color-pale);
  border-top: 3px solid var(--color-electric);
  border-bottom: 3px solid var(--color-electric);
}

.page-about__legacy-grid {
  display: grid;
  gap: 24px;
  border: 3px solid var(--color-ink);
  background: var(--color-cream);
  padding: 28px 24px;
  box-shadow: 8px 8px 0 rgba(11, 30, 51, 0.82);
}

.page-about__side-note--legacy .page-about__side-index {
  color: var(--color-electric);
}

.page-about__legacy-main h2 {
  font-size: clamp(28px, 3.4vw, 42px);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin: 0 0 16px;
}

.page-about__legacy-box {
  display: grid;
  gap: 24px;
  border: 2px solid var(--color-electric);
  background: rgba(46, 111, 242, 0.06);
  padding: 24px 20px;
  margin: 24px 0;
}

.page-about__legacy-block h3 {
  font-size: 15px;
  font-weight: 700;
  margin: 0 0 10px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--color-line);
}

.page-about__legacy-block p {
  font-size: 14px;
  line-height: 1.8;
  color: #4a463f;
  margin: 0;
}

.page-about__legacy-list {
  margin: 0;
  padding-left: 18px;
}

.page-about__legacy-list li {
  font-size: 14px;
  line-height: 1.75;
  color: #4a463f;
  margin-bottom: 8px;
}

.page-about__legacy-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ------- 质量与管理 ------- */
.page-about__quality-grid {
  display: grid;
  gap: 16px;
  margin-bottom: 32px;
}

.page-about__quality-card {
  position: relative;
  background: var(--color-navy);
  color: var(--color-cream);
  border: 2px solid var(--color-navy);
  padding: 28px 24px;
  box-shadow: 6px 6px 0 rgba(9, 18, 31, 0.2);
  transition: transform var(--ease), box-shadow var(--ease);
}

.page-about__quality-card:hover {
  transform: translateY(-4px);
  box-shadow: 10px 10px 0 rgba(9, 18, 31, 0.28);
}

.page-about__quality-card::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 46px;
  height: 46px;
  background: linear-gradient(135deg, transparent 50%, var(--color-neon) 50%);
}

.page-about__quality-num {
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 700;
  color: var(--color-neon);
  margin: 0 0 16px;
}

.page-about__quality-card h3 {
  font-size: 18px;
  color: var(--color-cream);
  margin: 0 0 12px;
}

.page-about__quality-card p:last-child {
  font-size: 14px;
  line-height: 1.8;
  color: var(--color-grayblue);
  margin: 0;
}

.page-about__quality-note {
  display: flex;
  flex-direction: column;
  gap: 18px;
  align-items: flex-start;
  border-top: 3px solid var(--color-ink);
  padding-top: 24px;
  margin-top: 40px;
}

.page-about__quality-note-text p {
  font-size: 14px;
  line-height: 1.85;
  color: var(--color-ink);
  margin: 0 0 10px;
}

.page-about__quality-note-text a {
  color: var(--color-electric);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about__quality-note-text a:hover {
  color: var(--color-orange);
}

.page-about__quality-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ------- 平板断点 ≥ 640px ------- */
@media (min-width: 640px) {
  .page-about__stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }

  .page-about__hero-coords {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }

  .page-about__legacy-grid {
    padding: 32px;
  }

  .page-about__legacy-box {
    padding: 28px;
  }
}

/* ------- 桌面断点 ≥ 960px ------- */
@media (min-width: 960px) {
  .page-about__position,
  .page-about__milestones,
  .page-about__assets,
  .page-about__legacy,
  .page-about__quality {
    padding-top: 96px;
    padding-bottom: 96px;
  }

  .page-about__hero {
    padding: 44px 0 80px;
  }

  .page-about__hero-main {
    padding-top: 24px;
    max-width: 82%;
  }

  .page-about__section-head {
    grid-template-columns: 7fr 5fr;
    align-items: end;
  }

  .page-about__section-lead {
    justify-self: end;
    text-align: right;
  }

  /* 品牌坐标：偏置网格 */
  .page-about__offset-grid {
    grid-template-columns: 3fr 9fr;
    gap: 48px;
  }

  .page-about__position-cols {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

  /* 编年索引 */
  .page-about__timeline {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 48px;
    align-items: start;
  }

  .page-about__timeline-body {
    padding: 20px 24px;
  }

  /* 数据资产 */
  .page-about__stats-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
  }

  .page-about__assets-bottom {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 48px;
    align-items: start;
  }

  /* 旧版对照 */
  .page-about__legacy-grid {
    grid-template-columns: 3fr 8fr;
    gap: 48px;
    padding: 40px;
  }

  .page-about__legacy-box {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

  /* 质量与管理 */
  .page-about__quality-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }

  .page-about__quality-note {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    gap: 32px;
  }

  .page-about__quality-note-text {
    max-width: 680px;
  }
}

/* ------- 降低动态效果 ------- */
@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition: none !important;
    scroll-behavior: auto !important;
  }
}