.page-about {
  --about-grid: rgba(0, 229, 255, 0.03);
  --about-watermark: rgba(0, 229, 255, 0.025);
  position: relative;
  background:
    radial-gradient(1200px 500px at 88% -4%, rgba(0, 229, 255, 0.08), transparent 70%),
    radial-gradient(900px 420px at -10% 22%, rgba(157, 78, 221, 0.08), transparent 65%),
    var(--bg-deep);
  isolation: isolate;
}

.page-about::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(var(--about-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--about-grid) 1px, transparent 1px);
  background-size: 56px 56px;
}

.page-about > * {
  position: relative;
  z-index: 1;
}

.page-about section[id] {
  scroll-margin-top: 96px;
}

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

/* 面包屑 */
.about-crumb {
  padding: 24px 0 4px;
  border-bottom: 1px solid rgba(242, 244, 248, 0.05);
}

.about-crumb .container {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
}

.about-crumb a {
  color: var(--cyan);
  text-decoration: none;
}

.about-crumb a:hover {
  text-decoration: underline;
}

.about-crumb-sep {
  color: var(--gray);
}

.about-crumb-current {
  color: var(--gray);
}

/* 首屏 */
.about-hero {
  padding: 96px 0 72px;
  position: relative;
}

.about-hero::after {
  content: "EST. 2019";
  position: absolute;
  right: -2%;
  top: 6%;
  font-family: var(--font-title);
  font-size: clamp(6rem, 20vw, 17rem);
  line-height: 1;
  color: var(--about-watermark);
  letter-spacing: 0.08em;
  user-select: none;
  pointer-events: none;
  writing-mode: vertical-rl;
  text-transform: uppercase;
}

.about-hero-inner {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.about-hero-topline {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.about-hero-index {
  color: var(--cyan);
  border: 1px solid var(--border-strong);
  padding: 4px 10px;
  background: rgba(0, 229, 255, 0.06);
}

.about-hero-est {
  color: var(--gray);
}

.about-hero h1 {
  margin: 24px 0 0;
  font-family: var(--font-title);
  font-size: clamp(2.6rem, 7vw, 6.4rem);
  line-height: 1.05;
  font-weight: 700;
  color: var(--cyan);
  text-transform: uppercase;
  letter-spacing: 0.02em;
  transform: skew(-3deg);
  text-shadow: 0 0 40px rgba(0, 229, 255, 0.25);
}

.about-hero-dot {
  color: var(--purple);
}

.about-hero-kicker {
  margin: 14px 0 0;
  font-family: var(--font-title);
  font-size: clamp(1.2rem, 3vw, 2rem);
  color: var(--purple);
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.about-hero-desc {
  max-width: 560px;
  margin: 28px 0 0;
  padding-left: 18px;
  border-left: 2px solid var(--purple);
  font-size: 15px;
  line-height: 1.85;
  color: var(--gray);
}

.about-hero-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  width: 100%;
  max-width: 760px;
  margin-top: 44px;
}

.about-stat {
  padding: 18px 16px;
  background: rgba(26, 32, 40, 0.72);
  border: 1px solid var(--border);
  border-top: 2px solid var(--cyan);
  backdrop-filter: blur(6px);
  transition: border-color 0.25s var(--ease), background-color 0.25s var(--ease);
}

.about-stat:hover {
  border-color: var(--border-strong);
  background: rgba(26, 32, 40, 0.92);
}

.about-stat-num {
  display: flex;
  align-items: baseline;
  font-family: var(--font-title);
  font-size: 2rem;
  line-height: 1;
  color: var(--cyan);
}

.about-stat-suffix {
  font-family: var(--font-title);
  font-size: 1.2rem;
  color: var(--purple);
  margin-left: 2px;
}

.about-stat-label {
  display: block;
  margin-top: 8px;
  font-size: 12px;
  color: var(--gray);
  letter-spacing: 0.06em;
}

.about-anchors {
  margin-top: 36px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.about-anchor {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--gray);
  text-decoration: none;
  padding: 8px 14px;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-left: 2px solid var(--purple);
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease), transform 0.25s var(--ease);
}

.about-anchor span {
  color: var(--cyan);
  margin-right: 6px;
}

.about-anchor:hover {
  color: var(--white);
  border-color: var(--border-strong);
  transform: translateY(-2px);
}

/* 章节标题 */
.about-section-head {
  display: flex;
  align-items: flex-start;
  gap: 18px;
  margin-bottom: 48px;
}

.about-section-index {
  flex-shrink: 0;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--cyan);
  letter-spacing: 0.12em;
  border: 1px solid var(--border-strong);
  padding: 6px 10px;
  background: rgba(0, 229, 255, 0.06);
}

.about-section-head .section-title {
  margin: 0 0 10px;
  font-family: var(--font-title);
  font-size: clamp(1.6rem, 4vw, 2.6rem);
  line-height: 1.25;
  color: var(--white);
  letter-spacing: 0.02em;
}

.about-section-head .section-desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--gray);
}

/* 01 品牌缘起 */
.about-origin-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
  align-items: center;
}

.about-origin-media {
  margin: 0;
  position: relative;
}

.about-origin-media::before {
  content: "";
  position: absolute;
  inset: 14px -8px -8px 14px;
  z-index: 0;
  border: 1px solid var(--border-strong);
  background: rgba(0, 229, 255, 0.03);
}

.about-origin-media img {
  position: relative;
  z-index: 1;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  filter: saturate(0.85) contrast(1.05);
}

.about-origin-media figcaption {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--gray);
  letter-spacing: 0.08em;
}

.about-origin-content p {
  margin: 0 0 18px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--gray);
}

.about-origin-facts {
  list-style: none;
  margin: 28px 0 32px;
  padding: 0;
  display: grid;
  gap: 12px;
}

.about-origin-facts li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 12px 16px;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-left: 3px solid var(--purple);
  font-size: 14px;
  color: var(--white);
}

.about-origin-facts span {
  color: var(--gray);
  font-size: 13px;
}

/* 02 里程碑 */
.about-timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 30px;
  position: relative;
}

.about-timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan) 0%, var(--purple) 55%, rgba(0, 229, 255, 0.15) 100%);
}

.about-timeline-item {
  position: relative;
  margin-bottom: 28px;
}

.about-timeline-item::before {
  content: "";
  position: absolute;
  left: -33px;
  top: 24px;
  width: 10px;
  height: 10px;
  transform: rotate(45deg);
  background: var(--bg-deep);
  border: 2px solid var(--cyan);
  box-shadow: 0 0 12px rgba(0, 229, 255, 0.5);
  transition: background-color 0.25s var(--ease), border-color 0.25s var(--ease);
}

.about-timeline-item:hover::before {
  background: var(--cyan);
}

.about-timeline-card {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-left: 3px solid var(--purple);
  padding: 20px 22px 18px;
  transition: transform 0.25s var(--ease), border-color 0.25s var(--ease), background-color 0.25s var(--ease);
}

.about-timeline-item:hover .about-timeline-card {
  transform: translateX(8px);
  border-color: var(--border-strong);
  border-left-color: var(--cyan);
  background-color: var(--bg-raise);
}

.about-timeline-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
}

.about-timeline-year {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 700;
  color: var(--cyan);
  letter-spacing: 0.1em;
}

.about-timeline-ver {
  font-family: var(--font-title);
  font-size: 13px;
  color: var(--purple);
  letter-spacing: 0.1em;
  padding: 3px 10px;
  background: rgba(157, 78, 221, 0.12);
  border: 1px solid rgba(157, 78, 221, 0.3);
}

.about-timeline-card h3 {
  margin: 0 0 8px;
  font-family: var(--font-title);
  font-size: 1.35rem;
  color: var(--white);
  letter-spacing: 0.03em;
}

.about-timeline-card p {
  margin: 0 0 12px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--gray);
}

.page-about .tag {
  font-size: 11px;
  letter-spacing: 0.08em;
  padding: 3px 8px;
}

.about-timeline-summary {
  margin: 32px 0 0;
  padding: 18px 20px;
  background: linear-gradient(100deg, rgba(0, 229, 255, 0.08), transparent);
  border: 1px solid var(--border);
  border-left: 3px solid var(--cyan);
  font-size: 14px;
  line-height: 1.8;
  color: var(--gray);
}

.about-milestone-strip {
  margin-top: 28px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.about-milestone-strip-item {
  padding: 18px 16px;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-bottom: 2px solid var(--purple);
}

.about-milestone-strip-item b {
  display: block;
  font-family: var(--font-title);
  font-size: 1.25rem;
  color: var(--cyan);
  letter-spacing: 0.04em;
}

.about-milestone-strip-item span {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  color: var(--gray);
}

.about-milestone-chart {
  margin: 48px 0 0;
  padding: 16px;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  clip-path: polygon(0 0, calc(100% - 28px) 0, 100% 28px, 100% 100%, 28px 100%, 0 calc(100% - 28px));
}

.about-milestone-chart img {
  width: 100%;
  height: auto;
  object-fit: cover;
}

.about-milestone-chart figcaption {
  padding: 12px 0 4px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--gray);
  letter-spacing: 0.04em;
}

/* 03 团队 */
.about-team-layout {
  display: grid;
  gap: 32px;
}

.about-team-summary {
  align-self: start;
  padding: 36px 32px;
  background: linear-gradient(150deg, var(--bg-panel), rgba(157, 78, 221, 0.08));
  border: 1px solid var(--border);
  border-top: 3px solid var(--cyan);
  position: relative;
}

.about-team-summary::after {
  content: "";
  position: absolute;
  right: 0;
  top: 0;
  width: 32%;
  height: 4px;
  background: linear-gradient(90deg, transparent, var(--purple));
}

.about-team-total {
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.about-team-num {
  font-family: var(--font-title);
  font-size: clamp(4rem, 9vw, 5.6rem);
  line-height: 1;
  color: var(--cyan);
}

.about-team-unit {
  font-family: var(--font-title);
  font-size: 1.5rem;
  color: var(--purple);
}

.about-team-summary p {
  margin: 18px 0 24px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--gray);
}

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

.about-team-list li {
  padding: 10px 14px;
  background: rgba(10, 14, 20, 0.5);
  border-left: 2px solid var(--cyan);
  font-size: 13px;
  color: var(--white);
}

.about-team-roster {
  display: grid;
  gap: 20px;
}

.about-team-card {
  padding: 24px 24px 22px 30px;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-left-width: 4px;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), border-color 0.25s var(--ease);
}

.about-team-card--match {
  border-left-color: var(--cyan);
}

.about-team-card--tech {
  border-left-color: var(--purple);
}

.about-team-card--data {
  border-left-color: var(--green);
}

.about-team-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-panel);
  border-color: var(--border-strong);
}

.about-team-card-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
}

.about-team-card-code {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cyan);
  letter-spacing: 0.1em;
  background: rgba(0, 229, 255, 0.08);
  padding: 2px 8px;
  border: 1px solid var(--border-strong);
}

.about-team-card h3 {
  margin: 0;
  font-family: var(--font-title);
  font-size: 1.3rem;
  color: var(--white);
}

.about-team-card ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 6px;
}

.about-team-card li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--gray);
}

.about-team-card li::before {
  content: ">";
  position: absolute;
  left: 0;
  color: var(--purple);
  font-family: var(--font-mono);
}

/* 04 服务承诺 */
.about-promise-grid {
  display: grid;
  gap: 18px;
}

.about-promise-card {
  position: relative;
  overflow: hidden;
  padding: 32px 26px 28px;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  transition: transform 0.25s var(--ease), border-color 0.25s var(--ease);
}

.about-promise-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--cyan), var(--purple));
  transform: scaleX(0.35);
  transform-origin: left;
  transition: transform 0.3s var(--ease);
}

.about-promise-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-strong);
}

.about-promise-card:hover::before {
  transform: scaleX(1);
}

.about-promise-card h3 {
  margin: 0 0 12px;
  font-family: var(--font-title);
  font-size: 1.55rem;
  color: var(--cyan);
  letter-spacing: 0.04em;
}

.about-promise-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--gray);
}

.about-promise-feature {
  margin-top: 40px;
  display: grid;
  grid-template-columns: 1fr;
  background: var(--bg-panel);
  border: 1px solid var(--border);
}

.about-promise-map {
  margin: 0;
}

.about-promise-map img {
  width: 100%;
  height: 280px;
  object-fit: cover;
}

.about-promise-capabilities {
  padding: 32px 28px;
}

.about-promise-capabilities h3 {
  margin: 0 0 20px;
  font-family: var(--font-title);
  font-size: 1.6rem;
  color: var(--white);
}

.about-promise-capabilities ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.about-promise-capabilities li {
  position: relative;
  padding-left: 22px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--white);
}

.about-promise-capabilities li::before {
  content: "▸";
  position: absolute;
  left: 0;
  color: var(--cyan);
}

.about-promise-capabilities li:nth-child(even)::before {
  color: var(--purple);
}

/* 结尾 CTA */
.about-closing {
  margin-top: 72px;
  padding: 72px 0;
  position: relative;
  background:
    linear-gradient(110deg, rgba(0, 229, 255, 0.08), transparent 45%),
    linear-gradient(70deg, transparent 60%, rgba(157, 78, 221, 0.14)),
    var(--bg-panel);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.about-closing::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(120deg, transparent 18px, rgba(0, 229, 255, 0.08) 18px, rgba(0, 229, 255, 0.08) 19px, transparent 19px),
    linear-gradient(60deg, transparent 18px, rgba(157, 78, 221, 0.06) 18px, rgba(157, 78, 221, 0.06) 19px, transparent 19px);
  background-size: 32px 56px;
}

.about-closing-inner {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.about-closing-tag {
  margin: 0 0 20px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--cyan);
  letter-spacing: 0.18em;
}

.about-closing h2 {
  margin: 0 0 18px;
  font-family: var(--font-title);
  font-size: clamp(1.8rem, 4.5vw, 3rem);
  color: var(--white);
}

.about-closing p {
  max-width: 520px;
  margin: 0 0 32px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--gray);
}

.about-closing-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 14px;
}

.about-closing-link {
  padding-bottom: 2px;
  border-bottom: 1px solid var(--border-strong);
  font-size: 14px;
  color: var(--cyan);
  text-decoration: none;
}

.about-closing-link:hover {
  color: var(--purple);
  border-color: var(--purple);
}

/* 响应式增强 */
@media (min-width: 680px) {
  .about-hero-stats {
    grid-template-columns: repeat(4, 1fr);
  }

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

@media (min-width: 768px) {
  .about-promise-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 900px) {
  .about-hero {
    padding: 140px 0 96px;
  }

  .about-origin-grid {
    grid-template-columns: 0.9fr 1.1fr;
    gap: 72px;
  }

  .about-origin-media::before {
    inset: 18px -14px -14px 18px;
  }

  .about-promise-feature {
    grid-template-columns: 0.85fr 1.15fr;
  }

  .about-promise-map img {
    height: 100%;
    min-height: 360px;
  }

  .about-promise-capabilities {
    padding: 40px 44px;
  }
}

@media (min-width: 1000px) {
  .about-team-layout {
    grid-template-columns: 0.9fr 1.1fr;
    gap: 56px;
  }

  .about-closing {
    padding: 96px 0;
  }
}