.page-about {
  --about-container: 1280px;
  --about-pad: 20px;
  --about-radius: 16px;
  overflow-x: clip;
  box-sizing: border-box;
}

.page-about *,
.page-about *::before,
.page-about *::after {
  box-sizing: border-box;
}

.page-about .about-container {
  width: 100%;
  max-width: var(--about-container);
  margin: 0 auto;
  padding-inline: var(--about-pad);
}

.page-about .about-heading {
  margin-bottom: 40px;
}

.page-about .section-title {
  margin: 10px 0 14px;
}

.page-about .about-hero .section-label {
  color: var(--c-accent);
}

.page-about .tech-copy .section-label,
.page-about .mission-panel .section-label {
  color: var(--c-gold);
}

/* 品牌宣言 */
.page-about .about-hero {
  position: relative;
  min-height: 0;
  display: flex;
  align-items: center;
  padding: 132px var(--about-pad) 56px;
  overflow: hidden;
  background: linear-gradient(140deg, var(--c-bg-dark) 0%, var(--c-bg) 60%, #133255 100%);
}

.page-about .about-hero-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  max-width: none;
  object-fit: cover;
  opacity: 0.3;
}

.page-about .about-hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(115deg, rgba(5, 14, 28, 0.92) 0%, rgba(11, 30, 58, 0.72) 50%, rgba(11, 30, 58, 0.25) 100%);
}

.page-about .about-hero-inner {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: var(--about-container);
  margin: 0 auto;
}

.page-about .about-hero-inner .breadcrumb {
  margin-bottom: 30px;
}

.page-about .about-hero h1 {
  font-family: var(--font-serif);
  font-size: clamp(32px, 7vw, 56px);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: 0.01em;
  margin: 10px 0 18px;
  color: var(--c-text);
}

.page-about .about-hero-statement {
  font-family: var(--font-serif);
  font-size: clamp(28px, 8vw, 44px);
  font-weight: 700;
  line-height: 1.35;
  max-width: 22em;
  color: var(--c-text);
  margin-bottom: 20px;
}

.page-about .about-hero-desc {
  color: var(--c-sub);
  font-size: 16px;
  line-height: 1.85;
  max-width: 560px;
  margin-bottom: 28px;
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 40px;
}

.page-about .about-hero-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 36px;
  margin: 0;
  padding: 24px 0 0;
  border-top: 1px solid var(--line-rule-strong);
}

.page-about .hero-fact {
  margin: 0;
}

.page-about .hero-fact-num {
  font-family: var(--font-mono);
  font-size: clamp(32px, 4vw, 48px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--c-text);
}

.page-about .hero-fact-unit {
  font-size: 0.55em;
  font-weight: 400;
  color: var(--c-gold);
}

.page-about .hero-fact-label {
  margin: 6px 0 0;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--c-sub);
}

/* 数据墙 */
.page-about .about-datastrip {
  position: relative;
  padding: 52px 0;
  background: linear-gradient(100deg, var(--c-bg-dark) 0%, #071527 70%, var(--c-bg) 100%);
  border-block: 1px solid var(--line-rule);
}

.page-about .about-datastrip::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--c-accent), transparent 60%, var(--c-gold));
}

.page-about .datastrip-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px 16px;
}

.page-about .datastrip-item {
  padding: 12px 4px;
  border-bottom: 1px dashed var(--line-rule);
}

.page-about .datastrip-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(34px, 9vw, 52px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--c-text);
}

.page-about .datastrip-unit {
  margin-left: 2px;
  font-size: 0.5em;
  font-weight: 500;
  color: var(--c-sub);
}

.page-about .datastrip-label {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--c-sub);
}

.page-about .datastrip-item.is-hot .datastrip-num {
  color: var(--c-accent);
}

.page-about .datastrip-item.is-gold .datastrip-num {
  color: var(--c-gold);
}

/* 发展历程 */
.page-about .about-journey {
  padding: 88px 0 72px;
}

.page-about .journey-track {
  position: relative;
  padding-top: 8px;
}

.page-about .journey-track::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 18px;
  width: 2px;
  background: linear-gradient(180deg, var(--c-gold), var(--c-accent) 80%);
  opacity: 0.6;
}

.page-about .journey-item {
  position: relative;
  padding: 0 0 48px 52px;
}

.page-about .journey-item:last-child {
  padding-bottom: 8px;
}

.page-about .journey-item::before {
  content: "";
  position: absolute;
  left: 12px;
  top: 8px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--c-bg);
  border: 3px solid var(--c-accent);
  box-shadow: 0 0 0 6px rgba(57, 255, 20, 0.1);
  z-index: 2;
}

.page-about .journey-year {
  font-family: var(--font-mono);
  font-size: 44px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--c-gold);
  margin-bottom: 10px;
}

.page-about .journey-title {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 700;
  line-height: 1.4;
  margin: 0 0 12px;
  color: var(--c-text);
}

.page-about .journey-text {
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-sub);
  margin-bottom: 14px;
}

.page-about .journey-tag {
  display: inline-block;
  padding: 5px 12px;
  border: 1px solid rgba(57, 255, 20, 0.35);
  border-radius: 999px;
  background: rgba(57, 255, 20, 0.06);
  color: var(--c-accent);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.1em;
}

/* 数据能力 */
.page-about .about-capability {
  padding: 88px 0 80px;
  background: linear-gradient(180deg, var(--c-bg) 0%, #071527 40%, var(--c-bg-dark) 100%);
}

.page-about .capability-grid {
  display: grid;
  gap: 36px;
  margin-bottom: 52px;
}

.page-about .capability-lead {
  font-size: 17px;
  line-height: 1.9;
  color: var(--c-text);
  margin-bottom: 28px;
}

.page-about .capability-subhead {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--c-text);
  margin: 24px 0 12px;
  padding-left: 12px;
  border-left: 3px solid var(--c-gold);
}

.page-about .capability-list {
  list-style: none;
  margin: 0 0 10px;
  padding: 0;
}

.page-about .capability-list li {
  position: relative;
  padding: 7px 0 7px 20px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--c-sub);
}

.page-about .capability-list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 15px;
  width: 6px;
  height: 6px;
  background: var(--c-accent);
  transform: rotate(45deg);
}

.page-about .capability-figure {
  margin: 28px 0 0;
}

.page-about .capability-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: var(--radius);
  border: 1px solid var(--line-rule);
  object-fit: cover;
}

.page-about .capability-figure figcaption {
  margin-top: 10px;
  font-size: 13px;
  text-align: right;
  color: var(--c-sub);
}

/* 指标面板 */
.page-about .metrics-panel {
  padding: 28px 24px;
  border: 1px solid var(--line-rule);
  border-radius: var(--about-radius);
  background: rgba(11, 30, 58, 0.55);
  box-shadow: var(--shadow-card);
}

.page-about .metrics-title {
  font-family: var(--font-serif);
  font-size: 26px;
  font-weight: 700;
  line-height: 1.4;
  margin: 0 0 8px;
  color: var(--c-text);
}

.page-about .capability-meter {
  padding: 18px 0;
  border-bottom: 1px solid var(--line-rule);
}

.page-about .capability-meter:last-of-type {
  border-bottom: 0;
}

.page-about .capability-meter-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 10px;
}

.page-about .capability-meter-label {
  font-size: 14px;
  color: var(--c-sub);
}

.page-about .capability-meter-num {
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--c-text);
}

.page-about .capability-meter-track {
  height: 4px;
  border-radius: 999px;
  background: rgba(160, 180, 200, 0.12);
  overflow: hidden;
}

.page-about .capability-meter-fill {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--c-accent), var(--c-gold));
}

.page-about .metrics-note {
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line-rule);
  font-size: 13px;
  line-height: 1.7;
  color: var(--c-sub);
}

/* 技术架构面板 */
.page-about .tech-panel-wrap {
  padding-top: 40px;
  border-top: 1px solid var(--line-rule);
}

.page-about .tech-panel {
  display: grid;
  grid-template-columns: 1fr;
  border: 1px solid var(--line-rule);
  border-radius: var(--about-radius);
  background: var(--c-card);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}

.page-about .tech-media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  min-height: 240px;
  object-fit: cover;
}

.page-about .tech-copy {
  padding: 32px 24px;
}

.page-about .tech-title {
  font-family: var(--font-serif);
  font-size: 30px;
  font-weight: 700;
  line-height: 1.3;
  margin: 8px 0 18px;
  color: var(--c-text);
}

.page-about .tech-list {
  list-style: none;
  margin: 0 0 24px;
  padding: 0;
}

.page-about .tech-list li {
  position: relative;
  padding: 12px 0 12px 22px;
  border-bottom: 1px solid var(--line-rule);
  font-size: 15px;
  line-height: 1.75;
  color: var(--c-sub);
}

.page-about .tech-list li:last-child {
  border-bottom: 0;
}

.page-about .tech-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 21px;
  width: 8px;
  height: 8px;
  border-top: 1px solid var(--c-accent);
  border-right: 1px solid var(--c-accent);
  transform: rotate(45deg);
}

.page-about .tech-list strong {
  color: var(--c-text);
  font-weight: 600;
}

/* 资质与荣誉 */
.page-about .about-credential {
  padding: 88px 0;
}

.page-about .credential-grid {
  display: grid;
  gap: 20px;
}

.page-about .credential-card {
  position: relative;
  padding: 36px 28px 40px;
  border: 1px solid var(--line-rule);
  border-radius: var(--about-radius);
  background: linear-gradient(160deg, rgba(26, 46, 74, 0.85), rgba(5, 14, 28, 0.7));
  transition: transform var(--t-mid) var(--ease), border-color var(--t-fast);
}

.page-about .credential-card:hover {
  transform: translateY(-6px);
  border-color: rgba(57, 255, 20, 0.5);
}

.page-about .credential-no {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.12em;
  color: var(--c-accent);
}

.page-about .credential-name {
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 700;
  line-height: 1.35;
  margin: 16px 0 14px;
  color: var(--c-text);
}

.page-about .credential-desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-sub);
}

/* 合作生态 */
.page-about .about-partners {
  padding: 80px 0 88px;
  border-block: 1px solid var(--line-rule);
  background: linear-gradient(180deg, transparent, rgba(5, 14, 28, 0.4));
}

.page-about .partner-grid {
  display: grid;
  gap: 16px;
}

.page-about .partner-node {
  position: relative;
  padding: 24px 20px 24px 28px;
  border: 1px solid var(--line-rule);
  border-radius: 12px;
  background: rgba(11, 30, 58, 0.42);
  overflow: hidden;
  transition: background var(--t-mid), transform var(--t-mid) var(--ease);
}

.page-about .partner-node:hover {
  background: rgba(26, 46, 74, 0.72);
  transform: translateX(4px);
}

.page-about .partner-index {
  position: absolute;
  right: 12px;
  top: 8px;
  font-family: var(--font-mono);
  font-size: 36px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.04em;
  color: rgba(160, 180, 200, 0.1);
}

.page-about .partner-name {
  position: relative;
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 700;
  line-height: 1.4;
  margin: 0 0 10px;
  color: var(--c-text);
}

.page-about .partner-desc {
  position: relative;
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--c-sub);
}

/* 品牌使命与联系 */
.page-about .about-mission {
  padding: 88px 0;
}

.page-about .mission-panel {
  position: relative;
  padding: 48px 28px;
  border: 1px solid var(--line-rule-strong);
  border-radius: 20px;
  background: linear-gradient(135deg, var(--c-bg-dark) 0%, var(--c-card) 100%);
  overflow: hidden;
}

.page-about .mission-panel::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--c-accent), var(--c-gold));
}

.page-about .mission-title {
  font-family: var(--font-serif);
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 700;
  line-height: 1.4;
  margin: 12px 0 16px;
  color: var(--c-text);
}

.page-about .mission-quote {
  font-size: 18px;
  line-height: 1.8;
  max-width: 40em;
  color: var(--c-sub);
  margin-bottom: 32px;
}

.page-about .mission-contact {
  display: grid;
  gap: 16px;
  margin: 32px 0 36px;
  padding-top: 28px;
  border-top: 1px solid var(--line-rule);
}

.page-about .contact-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .contact-label {
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-gold);
}

.page-about .contact-value {
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 500;
  color: var(--c-text);
  word-break: break-all;
}

.page-about .mission-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

/* 平板与桌面响应式 */
@media (min-width: 720px) {
  .page-about {
    --about-pad: 32px;
  }

  .page-about .partner-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-about .mission-contact {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    min-height: 92vh;
    padding: 120px 64px 80px;
  }

  .page-about .about-hero-actions {
    margin-bottom: 48px;
  }

  .page-about .datastrip-grid {
    grid-template-columns: repeat(6, 1fr);
    gap: 0 24px;
  }

  .page-about .datastrip-item {
    border-bottom: 0;
    border-right: 1px solid var(--line-rule);
    padding: 12px 20px 12px 0;
  }

  .page-about .datastrip-item:last-child {
    border-right: 0;
  }

  .page-about .datastrip-item:nth-child(odd) {
    transform: translateY(-6px);
  }

  .page-about .journey-track::before {
    left: 50%;
    transform: translateX(-50%);
  }

  .page-about .journey-item {
    width: 50%;
    padding: 0 60px 64px 0;
    text-align: right;
  }

  .page-about .journey-item::before {
    left: auto;
    right: -7px;
  }

  .page-about .journey-item:nth-child(even) {
    margin-left: 50%;
    padding: 0 0 64px 60px;
    text-align: left;
  }

  .page-about .journey-item:nth-child(even)::before {
    right: auto;
    left: -7px;
  }

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

@media (min-width: 960px) {
  .page-about .capability-grid {
    grid-template-columns: 56% 44%;
    gap: 56px;
    align-items: start;
  }

  .page-about .tech-panel {
    grid-template-columns: 42% 58%;
  }

  .page-about .tech-media img {
    height: 100%;
    min-height: 340px;
  }

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

@media (min-width: 1024px) {
  .page-about .partner-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }

  .page-about .mission-panel {
    padding: 56px 48px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .credential-card,
  .page-about .partner-node {
    transition: none;
    transform: none;
  }
}