.page-about {
  --about-deep: var(--black);
  --about-card: var(--card-bg);
  --about-orange: var(--orange);
  --about-fire: var(--grad-fire);
  --about-dim: var(--text-dim);
}

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

/* 英雄区 */
.page-about .about-hero {
  position: relative;
  padding: 36px 0 56px;
  overflow: hidden;
  background:
    radial-gradient(circle at 84% 16%, rgba(255, 78, 0, 0.18), transparent 44%),
    linear-gradient(152deg, var(--navy) 0%, #10244b 54%, var(--black) 100%);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -70px;
  bottom: -46px;
  width: 230px;
  height: 120px;
  background: var(--about-fire);
  clip-path: polygon(18% 0, 100% 0, 84% 100%, 0 100%);
  opacity: 0.2;
  pointer-events: none;
}

.page-about .about-hero .container {
  position: relative;
  z-index: 1;
}

.page-about .about-hero-grid {
  display: grid;
  gap: 36px;
  align-items: center;
}

.page-about .about-hero-content {
  max-width: 720px;
}

.page-about .about-hero-kicker {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 18px;
  font: 700 12px/1.5 var(--font-mono);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--green);
}

.page-about .about-hero-kicker::before {
  content: "";
  width: 30px;
  height: 2px;
  background: var(--about-fire);
  flex: none;
}

.page-about .about-hero h1 {
  margin: 0 0 22px;
  font: 900 clamp(2.4rem, 7vw, 4.8rem) / 1.06 var(--font-head);
  letter-spacing: 0.02em;
  color: var(--text);
  text-wrap: balance;
}

.page-about .about-hero-lead {
  margin: 0 0 28px;
  font-size: 16px;
  line-height: 1.75;
  color: var(--about-dim);
  max-width: 58ch;
}

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

.page-about .about-hero-panel {
  position: relative;
  background: var(--about-fire);
  border-radius: var(--radius);
  padding: 26px 22px 22px;
  box-shadow: var(--shadow);
  color: #fff;
  overflow: hidden;
}

.page-about .about-hero-panel::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--green), transparent 72%);
  pointer-events: none;
  z-index: 2;
}

.page-about .about-hero-panel::after {
  content: "";
  position: absolute;
  right: -34px;
  bottom: -34px;
  width: 110px;
  height: 110px;
  border: 14px solid rgba(255, 255, 255, 0.08);
  transform: rotate(24deg);
  border-radius: 22px;
  pointer-events: none;
}

.page-about .about-hero-panel-top {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}

.page-about .about-hero-panel-label {
  font: 600 12px/1.5 var(--font-mono);
  letter-spacing: 0.1em;
  opacity: 0.85;
}

.page-about .about-hero-panel-num {
  margin: 0;
  font: 900 clamp(3.2rem, 10vw, 5.4rem) / 1 var(--font-head);
  letter-spacing: -0.02em;
  color: #fff;
}

.page-about .about-hero-panel-num span {
  margin-left: 6px;
  font-size: 0.38em;
  font-weight: 700;
  vertical-align: 0.4em;
}

.page-about .about-hero-panel-desc {
  margin: 10px 0 0;
  font-size: 13px;
  line-height: 1.6;
  opacity: 0.92;
}

.page-about .about-hero-panel-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.22);
}

.page-about .about-hero-mini {
  background: rgba(10, 15, 30, 0.38);
  border-radius: var(--radius);
  padding: 12px 14px;
}

.page-about .about-hero-mini-num {
  display: block;
  font: 800 1.5rem/1.15 var(--font-head);
}

.page-about .about-hero-mini-label {
  display: block;
  margin-top: 4px;
  font-size: 12px;
  line-height: 1.4;
  opacity: 0.86;
}

/* 缘由 */
.page-about .about-origin {
  position: relative;
  padding: 60px 0;
  background: var(--black);
}

.page-about .about-origin::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 44%;
  height: 5px;
  background: var(--about-fire);
  pointer-events: none;
}

.page-about .about-origin-grid {
  display: grid;
  gap: 36px;
}

.page-about .about-origin-image {
  position: relative;
}

.page-about .about-origin-img {
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: var(--shadow);
  display: block;
}

.page-about .about-origin-note {
  display: block;
  margin-top: 10px;
  font: 500 12px/1.5 var(--font-mono);
  letter-spacing: 0.14em;
  color: var(--about-dim);
  text-transform: uppercase;
}

.page-about .about-origin-content {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.page-about .about-origin-text {
  margin: 0;
  color: var(--about-dim);
  font-size: 15px;
  line-height: 1.75;
}

.page-about .about-origin-points {
  list-style: none;
  margin: 10px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-origin-points li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 14px 14px 16px;
  background: var(--about-card);
  border-left: 3px solid var(--about-orange);
  border-radius: 0 var(--radius) var(--radius) 0;
  color: var(--text);
  font-size: 14px;
  line-height: 1.6;
}

.page-about .about-origin-icon {
  font: 700 12px/1.6 var(--font-mono);
  color: var(--about-orange);
}

/* 迭代之路 */
.page-about .about-journey {
  position: relative;
  padding: 60px 0;
  background: linear-gradient(180deg, var(--navy) 0%, #0d2247 48%, var(--navy) 100%);
}

.page-about .about-journey::before {
  content: "";
  position: absolute;
  right: 0;
  top: 0;
  width: 120px;
  height: 36px;
  background: var(--about-fire);
  clip-path: polygon(14% 0, 100% 0, 100% 100%, 0 100%);
  opacity: 0.55;
  pointer-events: none;
}

.page-about .about-journey::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--orange) 0%, var(--red) 34%, var(--green) 100%);
  opacity: 0.8;
  pointer-events: none;
}

.page-about .about-journey .container {
  position: relative;
  z-index: 1;
}

.page-about .about-journey-head {
  margin-bottom: 34px;
}

.page-about .about-journey-desc {
  margin: 16px 0 0;
  max-width: 64ch;
  color: var(--about-dim);
  line-height: 1.7;
  font-size: 15px;
}

.page-about .journey-layout {
  display: grid;
  gap: 42px;
}

.page-about .journey-image {
  position: relative;
}

.page-about .journey-image img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius);
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: var(--shadow);
}

.page-about .journey-image-caption {
  display: block;
  margin-top: 10px;
  font: 500 12px/1.5 var(--font-mono);
  letter-spacing: 0.14em;
  color: var(--about-dim);
  text-transform: uppercase;
}

.page-about .journey-list {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.page-about .journey-list::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  background: linear-gradient(to bottom, var(--orange), var(--red) 48%, var(--green) 92%);
  opacity: 0.55;
}

.page-about .journey-item {
  position: relative;
  padding-left: 34px;
  margin-bottom: 26px;
}

.page-about .journey-item:last-child {
  margin-bottom: 0;
}

.page-about .journey-node {
  position: absolute;
  left: 0;
  top: 24px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--about-card);
  border: 3px solid var(--about-orange);
  box-shadow: 0 0 0 4px rgba(255, 78, 0, 0.16);
  z-index: 1;
}

.page-about .journey-year {
  display: inline-block;
  margin-bottom: 10px;
  font: 700 13px/1.5 var(--font-mono);
  letter-spacing: 0.08em;
  color: var(--about-orange);
  padding: 2px 8px;
  background: rgba(255, 78, 0, 0.1);
  border-radius: var(--radius);
}

.page-about .journey-card {
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.page-about .journey-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 40px rgba(0, 0, 0, 0.4);
  border-color: rgba(255, 78, 0, 0.4);
}

.page-about .journey-card h3 {
  margin: 6px 0 8px;
  font: 800 1.2rem/1.3 var(--font-head);
  color: var(--text);
}

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

.page-about .journey-card-tag {
  display: inline-block;
  margin-top: 0;
}

.page-about .journey-hover-note {
  display: inline-block;
  margin-top: 12px;
  font: 600 12px/1.4 var(--font-mono);
  letter-spacing: 0.04em;
  color: var(--green);
  opacity: 0;
  transform: translateX(-6px);
  transition: opacity 0.25s ease, transform 0.25s ease;
}

.page-about .journey-card:hover .journey-hover-note,
.page-about .journey-card:focus-within .journey-hover-note {
  opacity: 1;
  transform: translateX(0);
}

/* 数据理念 */
.page-about .about-ethos {
  position: relative;
  padding: 60px 0;
  background: var(--black);
}

.page-about .about-ethos::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 30%;
  height: 5px;
  background: linear-gradient(90deg, var(--green), var(--orange) 100%);
  pointer-events: none;
}

.page-about .about-ethos-head {
  margin-bottom: 34px;
}

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

.page-about .ethos-card {
  position: relative;
  padding: 24px 20px 20px;
  border-top: 3px solid var(--about-orange);
}

.page-about .ethos-index {
  display: inline-block;
  font: 800 13px/1.4 var(--font-mono);
  color: var(--about-orange);
  letter-spacing: 0.1em;
}

.page-about .ethos-card h3 {
  margin: 10px 0 10px;
  font: 800 1.6rem/1.2 var(--font-head);
  color: var(--text);
}

.page-about .ethos-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--about-dim);
}

.page-about .ethos-stats {
  display: grid;
  gap: 18px;
  margin-top: 36px;
  padding: 24px 20px;
  background: var(--about-card);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius);
}

.page-about .ethos-stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .ethos-stat-num {
  font: 900 2.2rem/1 var(--font-head);
  color: var(--text);
}

.page-about .ethos-stat-label {
  font-size: 13px;
  color: var(--about-dim);
}

.page-about .ethos-stat .progress-track {
  background: rgba(255, 255, 255, 0.1);
  height: 6px;
}

.page-about .ethos-stat .progress-bar {
  background: var(--about-fire);
}

/* 团队 */
.page-about .about-team {
  padding: 60px 0;
  background:
    radial-gradient(ellipse 320px 200px at 14% 82%, rgba(255, 178, 0, 0.12), transparent 62%),
    var(--navy);
}

.page-about .team-layout {
  display: grid;
  gap: 42px;
}

.page-about .team-image img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius);
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: var(--shadow);
}

.page-about .team-image-caption {
  display: block;
  margin-top: 10px;
  font: 500 12px/1.5 var(--font-mono);
  letter-spacing: 0.14em;
  color: var(--about-dim);
  text-transform: uppercase;
}

.page-about .team-content {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.page-about .team-lead {
  margin: 0;
  color: var(--about-dim);
  font-size: 15px;
  line-height: 1.75;
}

.page-about .team-skills {
  list-style: none;
  margin: 10px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .team-skill {
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 14px;
  align-items: baseline;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.page-about .team-skill:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.page-about .team-skill-tag {
  font: 800 14px/1.6 var(--font-head);
  color: var(--about-orange);
  letter-spacing: 0.06em;
}

.page-about .team-skill > span:last-child {
  color: var(--about-dim);
  font-size: 14px;
  line-height: 1.6;
}

.page-about .team-badges {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-top: 10px;
}

.page-about .team-badge {
  background: var(--about-card);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-left: 3px solid var(--green);
  border-radius: var(--radius);
  padding: 12px 12px 10px;
}

.page-about .team-badge strong {
  display: block;
  font: 800 14px/1.4 var(--font-head);
  color: var(--text);
}

.page-about .team-badge span {
  display: block;
  margin-top: 4px;
  font-size: 12px;
  line-height: 1.45;
  color: var(--about-dim);
}

.page-about .team-partners {
  margin: 16px 0 0;
  padding: 12px 14px;
  border: 1px dashed rgba(255, 78, 0, 0.35);
  border-radius: var(--radius);
  color: var(--about-dim);
  font-size: 13px;
  line-height: 1.6;
  background: rgba(255, 78, 0, 0.06);
}

/* CTA */
.page-about .about-cta {
  padding: 56px 0;
  background: var(--black);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.page-about .about-cta-inner {
  display: grid;
  gap: 28px;
}

.page-about .about-cta-text h2 {
  margin: 0 0 12px;
  font: 900 clamp(1.6rem, 4vw, 2.4rem) / 1.2 var(--font-head);
  color: var(--text);
}

.page-about .about-cta-text p {
  margin: 0;
  color: var(--about-dim);
  line-height: 1.7;
  max-width: 54ch;
}

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

/* 中屏 */
@media (min-width: 720px) {
  .page-about .ethos-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
  }

  .page-about .ethos-stats {
    grid-template-columns: repeat(3, 1fr);
    align-items: start;
  }

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

  .page-about .about-cta-inner {
    grid-template-columns: 1fr auto;
    align-items: center;
  }
}

/* 桌面端 */
@media (min-width: 960px) {
  .page-about .about-hero {
    padding: 48px 0 72px;
  }

  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.25fr) minmax(320px, 0.75fr);
    gap: 48px;
  }

  .page-about .about-hero-panel {
    align-self: center;
  }

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

  .page-about .about-journey {
    padding: 72px 0;
  }

  .page-about .journey-layout {
    grid-template-columns: 1fr 1fr;
    gap: 56px;
    align-items: start;
  }

  .page-about .journey-image {
    position: sticky;
    top: 80px;
  }

  .page-about .journey-item {
    display: grid;
    grid-template-columns: 120px 28px 1fr;
    gap: 14px;
    align-items: start;
    padding-left: 0;
  }

  .page-about .journey-list::before {
    left: 134px;
  }

  .page-about .journey-node {
    position: static;
    margin-top: 24px;
  }

  .page-about .journey-year {
    justify-self: end;
    margin-bottom: 0;
  }

  .page-about .about-team {
    padding: 72px 0;
  }

  .page-about .team-layout {
    grid-template-columns: 0.92fr 1.08fr;
    gap: 60px;
    align-items: center;
  }
}