/* ========== 品牌概况页 page-about 专属样式 ========== */
.page-about {
  --abt-grid-line: rgba(26, 43, 76, 0.5);
  --abt-green: #39FF14;
  --abt-orange: #FF6B35;
  background:
    radial-gradient(ellipse at 82% 8%, rgba(18, 48, 107, 0.7) 0%, transparent 55%),
    linear-gradient(var(--abt-grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--abt-grid-line) 1px, transparent 1px);
  background-size: 100% 100%, 48px 48px, 48px 48px;
  position: relative;
  overflow: hidden;
}

/* 首屏 Hero */
.page-about__hero {
  position: relative;
  padding: clamp(24px, 4vw, 48px) 0 clamp(32px, 6vw, 64px);
}

.page-about__hero-svg {
  position: absolute;
  right: -20px;
  bottom: 4%;
  width: 140px;
  height: 140px;
  opacity: 0.5;
  pointer-events: none;
  z-index: 0;
}

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

.page-about__crumb-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px 16px;
  margin-bottom: clamp(32px, 6vw, 72px);
}

.page-about .breadcrumbs__list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 0;
  margin: 0;
}

.page-about .breadcrumbs__item {
  color: var(--color-text-secondary);
  font-size: 0.875rem;
}

.page-about .breadcrumbs__item + .breadcrumbs__item::before {
  content: "/";
  color: var(--color-border);
  margin-right: 8px;
}

.page-about .breadcrumbs__link {
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.page-about .breadcrumbs__link:hover {
  color: var(--color-accent);
}

.page-about__version-note {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.page-about__version-text {
  color: var(--color-text-secondary);
  font-size: 0.875rem;
}

.page-about__hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  align-items: stretch;
}

.page-about__hero-copy h1 {
  font-size: clamp(2.2rem, 5vw, 4rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin: 0 0 20px;
  color: var(--color-text);
}

.page-about__hero-sub {
  display: block;
  margin-top: 8px;
  font-size: 0.42em;
  line-height: 1.2;
  color: var(--color-text-secondary);
  font-weight: 600;
  letter-spacing: 0;
}

.page-about__hero-lead {
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--color-text-secondary);
  max-width: 56ch;
  margin-bottom: 28px;
}

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

.page-about__hero-stats {
  margin: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: rgba(18, 48, 107, 0.6);
}

.page-about__hero-stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 12px;
  border-right: 1px solid var(--color-border);
  background: rgba(10, 31, 68, 0.55);
}

.page-about__hero-stat:last-child {
  border-right: 0;
}

.page-about__hero-stat dt {
  order: 2;
  color: var(--color-text-secondary);
  font-size: 0.75rem;
  line-height: 1.4;
}

.page-about__hero-stat dd {
  order: 1;
  margin: 0;
  font-family: var(--font-digital);
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--color-accent);
}

.page-about__hero-stat:nth-child(2) dd {
  color: var(--color-accent-orange);
}

/* 锚点导航 */
.page-about__anchor-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid var(--color-border);
}

.page-about__anchor-nav a {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  text-decoration: none;
  letter-spacing: 0.03em;
  transition: color var(--transition-fast);
}

.page-about__anchor-nav a::before {
  content: "◆ ";
  color: var(--color-accent);
  font-size: 0.7em;
}

.page-about__anchor-nav a:hover {
  color: var(--color-accent);
}

/* 章节通用 */
.page-about__section {
  padding: clamp(56px, 8vw, 104px) 0;
}

.page-about .section__header {
  margin-bottom: clamp(28px, 5vw, 44px);
}

.page-about .section__eyebrow {
  margin-bottom: 12px;
}

.page-about .section__desc {
  max-width: 64ch;
}

/* 品牌故事 */
.page-about__story-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
}

.page-about__story-main h2,
.page-about__team-content h2 {
  font-size: clamp(1.7rem, 3vw, 2.4rem);
  line-height: 1.2;
  margin-bottom: 16px;
}

.page-about__story-main p {
  color: var(--color-text-secondary);
  line-height: 1.85;
  margin-bottom: 1em;
}

.page-about__story-aside {
  display: grid;
  gap: 16px;
  align-content: start;
}

.page-about__mission-card {
  padding: 24px;
  border-left: 3px solid var(--color-accent);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.page-about__mission-card h3 {
  font-size: 1.125rem;
  margin-bottom: 8px;
}

.page-about__mission-card p {
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.page-about__fact-card {
  display: grid;
  gap: 14px;
  padding: 24px;
}

.page-about__fact-item {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
}

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

.page-about__fact-num {
  font-family: var(--font-digital);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-accent);
}

.page-about__fact-label {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
}

/* 发展里程碑 */
.page-about__milestones {
  background: linear-gradient(180deg, rgba(10, 31, 68, 0) 0%, rgba(18, 48, 107, 0.35) 18%, rgba(18, 48, 107, 0.35) 82%, rgba(10, 31, 68, 0) 100%);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.page-about__milestones-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}

.page-about__timeline {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 20px;
}

.page-about__timeline::before {
  content: "";
  position: absolute;
  top: 6px;
  bottom: 6px;
  left: 6px;
  width: 2px;
  background: linear-gradient(180deg, var(--color-accent), rgba(57, 255, 20, 0.12));
}

.page-about__timeline-item {
  position: relative;
  padding-left: 34px;
}

.page-about__timeline-item::before {
  content: "";
  position: absolute;
  left: 1px;
  top: 22px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 0 4px rgba(57, 255, 20, 0.15), 0 0 18px rgba(57, 255, 20, 0.35);
}

.page-about__timeline-tag {
  display: inline-block;
  margin-bottom: 6px;
  padding: 3px 10px;
  border: 1px solid rgba(57, 255, 20, 0.35);
  border-radius: 999px;
  font-family: var(--font-digital);
  font-size: 0.75rem;
  color: var(--color-accent);
  background: rgba(57, 255, 20, 0.06);
}

.page-about__timeline-card {
  padding: 18px 20px;
}

.page-about__timeline-card h3 {
  font-size: 1.0625rem;
  margin-bottom: 6px;
}

.page-about__timeline-card p {
  color: var(--color-text-secondary);
  line-height: 1.7;
  font-size: 0.9rem;
}

.page-about__milestone-figure img,
.page-about__capability-figure img,
.page-about__team-figure img {
  display: block;
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
}

.page-about__milestone-figure figcaption,
.page-about__capability-figure figcaption,
.page-about__team-figure figcaption {
  margin-top: 10px;
  color: var(--color-text-secondary);
  font-size: 0.8rem;
  text-align: center;
}

/* 数据服务能力 */
.page-about__capability {
  position: relative;
}

.page-about__capability::after {
  content: "";
  position: absolute;
  right: 0;
  top: 0;
  width: clamp(80px, 12vw, 220px);
  height: 4px;
  background: linear-gradient(90deg, var(--color-accent), transparent);
}

.page-about__capability-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  align-items: center;
}

.page-about__dials {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  justify-items: center;
}

.page-about__dial {
  --dial-progress: 360deg;
  --dial-color: var(--color-accent);
  position: relative;
  width: 132px;
  height: 132px;
  border-radius: 50%;
  background: conic-gradient(
    from -90deg,
    var(--dial-color) 0deg var(--dial-progress),
    rgba(255, 255, 255, 0.06) var(--dial-progress) 360deg
  );
  display: grid;
  place-items: center;
}

.page-about__dial::after {
  content: "";
  position: absolute;
  inset: 12px;
  border-radius: 50%;
  background: var(--color-card);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.04);
}

.page-about__dial-inner {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  text-align: center;
}

.page-about__dial-value {
  font-family: var(--font-digital);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.1;
}

.page-about__dial-label {
  font-size: 0.72rem;
  color: var(--color-text-secondary);
  line-height: 1.4;
  padding: 0 4px;
}

.page-about__capability-note {
  margin-top: 32px;
  padding: 20px 24px;
  border: 1px solid var(--color-border);
  background: rgba(18, 48, 107, 0.35);
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  line-height: 1.8;
}

/* 资质与认证 */
.page-about__credentials {
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  background: radial-gradient(ellipse at 20% 0%, rgba(57, 255, 20, 0.06) 0%, transparent 50%);
}

.page-about__credential-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.page-about__credential-card {
  padding: 26px 22px;
  position: relative;
}

.page-about__credential-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 22px;
  right: 22px;
  height: 2px;
  background: linear-gradient(90deg, var(--color-accent), rgba(57, 255, 20, 0.05));
  opacity: 0.7;
}

.page-about__credential-icon {
  width: 52px;
  height: 52px;
  border: 1px solid rgba(57, 255, 20, 0.4);
  border-radius: 12px;
  display: grid;
  place-items: center;
  font-family: var(--font-heading);
  font-size: 0.9rem;
  color: var(--color-accent);
  margin-bottom: 18px;
  background: rgba(57, 255, 20, 0.06);
}

.page-about__credential-card h3 {
  margin-bottom: 8px;
  font-size: 1.125rem;
}

.page-about__credential-card p {
  color: var(--color-text-secondary);
  line-height: 1.7;
  font-size: 0.925rem;
}

.page-about__credential-foot {
  margin-top: 28px;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
}

/* 团队与组织 */
.page-about__team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
}

.page-about__team-content p {
  color: var(--color-text-secondary);
  line-height: 1.8;
}

.page-about__team-list {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about__team-list li {
  padding: 16px 18px;
  background: rgba(18, 48, 107, 0.35);
  border-left: 3px solid var(--color-accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.page-about__team-list li:nth-child(even) {
  border-left-color: var(--color-accent-orange);
}

.page-about__team-list strong {
  display: block;
  color: var(--color-text);
  margin-bottom: 4px;
  font-size: 1rem;
}

.page-about__team-list li {
  color: var(--color-text-secondary);
  line-height: 1.7;
  font-size: 0.925rem;
}

/* 继续探索 */
.page-about__next-card {
  display: flex;
  flex-direction: column;
  gap: 24px;
  align-items: stretch;
  padding: 28px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(ellipse at 80% 0%, rgba(57, 255, 20, 0.1) 0%, transparent 45%),
    linear-gradient(135deg, rgba(18, 48, 107, 0.9), rgba(10, 31, 68, 0.9));
  box-shadow: var(--shadow-md);
}

.page-about__next-copy h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  margin-bottom: 8px;
}

.page-about__next-copy p {
  color: var(--color-text-secondary);
  line-height: 1.7;
  font-size: 0.95rem;
}

.page-about__next-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* 平板桌面断点 */
@media (min-width: 520px) {
  .page-about__dial {
    width: 150px;
    height: 150px;
  }

  .page-about__dial-value {
    font-size: 1.6rem;
  }
}

@media (min-width: 720px) {
  .page-about__hero-grid {
    grid-template-columns: 1.5fr 0.9fr;
    gap: 48px;
  }

  .page-about__hero-stat {
    padding: 20px 16px;
  }

  .page-about__hero-stat dd {
    font-size: 1.875rem;
  }

  .page-about__hero-svg {
    width: 200px;
    height: 200px;
  }

  .page-about__story-grid {
    grid-template-columns: 1.55fr 1fr;
    gap: 64px;
    align-items: start;
  }

  .page-about__credential-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }

  .page-about__team-grid {
    grid-template-columns: 0.9fr 1.1fr;
    gap: 56px;
    align-items: center;
  }

  .page-about__next-card {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    padding: 36px 40px;
  }
}

@media (min-width: 860px) {
  .page-about__timeline {
    grid-template-columns: 1fr 56px 1fr;
  }

  .page-about__timeline::before {
    left: calc(50% - 1px);
  }

  .page-about__timeline-item {
    grid-column: 1;
    padding-left: 0;
    padding-right: 40px;
    text-align: right;
  }

  .page-about__timeline-item::before {
    left: auto;
    right: 22px;
    top: 24px;
  }

  .page-about__timeline-item:nth-child(even) {
    grid-column: 3;
    padding-right: 0;
    padding-left: 40px;
    text-align: left;
  }

  .page-about__timeline-item:nth-child(even)::before {
    right: auto;
    left: 22px;
  }
}

@media (min-width: 960px) {
  .page-about__capability-grid {
    grid-template-columns: 1fr 1fr;
    gap: 56px;
  }

  .page-about__dials {
    gap: 28px;
  }
}

@media (min-width: 1080px) {
  .page-about__milestones-grid {
    grid-template-columns: 1.2fr 0.8fr;
    gap: 64px;
  }

  .page-about__milestone-figure {
    order: 2;
    position: sticky;
    top: 96px;
    align-self: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    animation: none !important;
    transition: none !important;
  }
}