.page-about {
  --about-ink-soft: rgba(17, 17, 17, 0.78);
  --about-ink-faint: rgba(17, 17, 17, 0.6);
  --about-panel-blue: #15263e;
  --about-grid-line: rgba(29, 53, 87, 0.055);
  --about-white-line: rgba(248, 249, 250, 0.2);
  --about-card-shadow: 6px 6px 0 0 rgba(211, 211, 211, 0.85);
  background: var(--paper-white);
  color: var(--ink-black);
  font-family: var(--font-body);
  line-height: 1.72;
  overflow-x: hidden;
}

.page-about__inner {
  padding: clamp(1.25rem, 3vw, 2.5rem) 0 5rem;
}

/* 面包屑 */
.page-about__breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.9rem;
  color: var(--ink-black);
  opacity: 0.72;
  margin: 3rem 0 1.5rem;
}

.page-about__breadcrumb a {
  color: var(--midnight-blue);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.page-about__breadcrumb a:hover {
  border-bottom-color: var(--racing-red);
  color: var(--racing-red);
}

.page-about__breadcrumb-sep {
  color: rgba(17, 17, 17, 0.35);
}

/* 章节标签 */
.page-about .st-tag {
  margin-bottom: 0.75rem;
}

.page-about__tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-weight: 700;
}

/* 01 品牌定位 / 左右分屏 */
.page-about__hero {
  position: relative;
  display: grid;
  gap: 2.5rem;
  padding: 2rem 0 3rem;
}

.page-about__hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(var(--about-grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--about-grid-line) 1px, transparent 1px);
  background-size: 40px 40px;
}

.page-about__hero-copy,
.page-about__hero-stats {
  position: relative;
  z-index: 1;
}

.page-about__hero-title {
  font-family: var(--font-heading);
  font-size: clamp(2.5rem, 8vw, 4.5rem);
  line-height: 0.96;
  letter-spacing: 0.01em;
  text-transform: uppercase;
  margin: 1.2rem 0 1.6rem;
  max-width: 11em;
}

.page-about__hero-lead {
  font-size: clamp(1.1rem, 1.5vw, 1.35rem);
  line-height: 1.55;
  font-weight: 600;
  color: var(--midnight-blue);
  max-width: 56ch;
  margin: 0;
}

.page-about__hero-body {
  margin: 1.2rem 0 0;
  color: var(--about-ink-soft);
  max-width: 60ch;
}

.page-about__hero-figure {
  margin: 2.5rem 0 0;
}

.page-about__hero-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 2px solid var(--ink-black);
  box-shadow: 8px 8px 0 0 var(--cool-gray);
}

.page-about__hero-figure figcaption {
  margin-top: 0.75rem;
  font-size: 0.85rem;
  color: var(--about-ink-faint);
  padding-left: 0.9rem;
  border-left: 3px solid var(--racing-red);
}

/* 右侧竖向数据指标 */
.page-about__hero-stats {
  align-self: start;
  background: linear-gradient(160deg, var(--midnight-blue) 0%, var(--about-panel-blue) 100%);
  color: var(--paper-white);
  padding: 1.8rem 1.6rem;
  border: 2px solid var(--ink-black);
  box-shadow: 12px 12px 0 0 var(--racing-red);
  position: relative;
}

.page-about__hero-stats::after {
  content: "";
  position: absolute;
  right: -1px;
  top: -1px;
  width: 44px;
  height: 44px;
  background: var(--electric-cyan);
  clip-path: polygon(100% 0, 0 0, 100% 100%);
}

.page-about__stat-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.15rem 0.2rem;
  border-bottom: 1px solid var(--about-white-line);
  transition: transform 0.2s ease, background 0.2s ease;
}

.page-about__stat-row:last-of-type {
  border-bottom: 0;
}

.page-about__stat-row:hover {
  background: rgba(57, 255, 20, 0.08);
  transform: translateX(6px);
}

.page-about__stat-num {
  font-family: var(--font-data);
  font-size: clamp(2.1rem, 5vw, 3.2rem);
  line-height: 1;
  color: var(--neon-green);
  letter-spacing: -0.02em;
}

.page-about__stat-unit {
  font-family: var(--font-data);
  font-size: 0.5em;
  color: var(--electric-cyan);
  margin-left: 2px;
}

.page-about__stat-label {
  font-size: 0.95rem;
  text-align: right;
  line-height: 1.35;
  color: rgba(248, 249, 250, 0.82);
}

.page-about__stats-note {
  font-size: 0.78rem;
  line-height: 1.55;
  color: rgba(248, 249, 250, 0.5);
  margin: 1rem 0 0;
  padding-top: 1rem;
  border-top: 1px dashed rgba(248, 249, 250, 0.3);
}

/* 数据流动线 */
.page-about__rule {
  height: 5px;
  background: linear-gradient(90deg, var(--racing-red) 0 30%, var(--electric-cyan) 30% 62%, var(--violet) 62% 100%);
  margin: 1.5rem 0 2.5rem;
}

/* 章节标题 */
.page-about__section-head {
  margin: 4.5rem 0 2rem;
}

.page-about__section-title {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 4vw, 3.25rem);
  line-height: 1.04;
  letter-spacing: 0.01em;
  text-transform: uppercase;
  margin: 1rem 0 0;
}

/* 02 发展里程碑 */
.page-about__milestones {
  position: relative;
  padding: 2rem 0 3rem;
}

.page-about__milestones-grid {
  display: grid;
  gap: 2rem;
  align-items: start;
}

.page-about__timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.5rem;
}

.page-about__milestone {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1.1rem;
  background: var(--paper-white);
  border: 1px solid var(--cool-gray);
  padding: clamp(1.2rem, 3vw, 1.9rem);
  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.page-about__milestone:hover {
  border-color: var(--racing-red);
  box-shadow: 6px 6px 0 0 rgba(0, 240, 255, 0.55);
  transform: translate(-2px, -2px);
}

.page-about__milestone-code {
  font-family: var(--font-heading);
  font-size: clamp(2.6rem, 6vw, 4.5rem);
  line-height: 0.85;
  color: var(--racing-red);
  min-width: 1ch;
}

.page-about__milestone-title {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  margin: 0 0 0.5rem;
}

.page-about__milestone-body p {
  margin: 0;
  color: var(--about-ink-soft);
  font-size: 0.95rem;
}

.page-about__milestones-figure {
  margin: 0;
}

.page-about__milestones-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 2px solid var(--ink-black);
  box-shadow: 10px 10px 0 0 var(--midnight-blue);
}

.page-about__milestones-figure figcaption {
  margin-top: 0.75rem;
  font-size: 0.85rem;
  color: var(--about-ink-faint);
}

/* 03 数据服务能力 */
.page-about__capabilities {
  padding: 2rem 0 3rem;
}

.page-about__cap-grid {
  display: grid;
  gap: 1.5rem;
  margin-top: 2.5rem;
}

.page-about__cap-card {
  --about-cap-accent: var(--midnight-blue);
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1.6rem;
  background: var(--paper-white);
  border: 1px solid var(--ink-black);
  box-shadow: var(--about-card-shadow);
  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.page-about__cap-card:nth-child(2) {
  --about-cap-accent: var(--electric-cyan);
}

.page-about__cap-card:nth-child(3) {
  --about-cap-accent: var(--violet);
}

.page-about__cap-card:nth-child(4) {
  --about-cap-accent: var(--racing-red);
}

.page-about__cap-card:nth-child(5) {
  --about-cap-accent: var(--midnight-blue);
}

.page-about__cap-card:nth-child(6) {
  --about-cap-accent: var(--electric-cyan);
}

.page-about__cap-card:hover {
  border-color: var(--about-cap-accent);
  box-shadow: 6px 6px 0 0 var(--about-cap-accent);
  transform: translate(-3px, -3px);
}

.page-about__cap-num {
  font-family: var(--font-data);
  font-size: clamp(2rem, 5vw, 2.8rem);
  line-height: 1;
  color: var(--about-cap-accent);
  margin-bottom: 0.4rem;
  letter-spacing: -0.02em;
}

.page-about__cap-title {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  margin: 0;
}

.page-about__cap-card p {
  margin: 0;
  font-size: 0.95rem;
  color: var(--about-ink-soft);
}

/* 04 运营团队 */
.page-about__team {
  display: grid;
  gap: 2rem;
  padding: 4rem 0 2rem;
}

.page-about__team-copy p {
  color: var(--about-ink-soft);
  max-width: 62ch;
  margin: 1rem 0 0;
}

.page-about__team-figure {
  margin: 0;
}

.page-about__team-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 2px solid var(--ink-black);
  box-shadow: 10px 10px 0 0 var(--midnight-blue);
}

.page-about__team-figure figcaption {
  margin-top: 0.75rem;
  font-size: 0.85rem;
  color: var(--about-ink-faint);
}

/* 05 信任与联系 */
.page-about__trust {
  margin-top: 4rem;
  padding: 2rem 0 0;
}

.page-about__trust-box {
  position: relative;
  background: var(--midnight-blue);
  color: var(--paper-white);
  padding: clamp(1.8rem, 5vw, 3.5rem);
  border: 2px solid var(--ink-black);
  box-shadow: 10px 10px 0 0 var(--racing-red);
}

.page-about__trust-box::before {
  content: "";
  position: absolute;
  left: -2px;
  bottom: -2px;
  width: 64px;
  height: 64px;
  background: var(--electric-cyan);
  clip-path: polygon(0 0, 0 100%, 100% 100%);
  pointer-events: none;
}

.page-about__trust-title {
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  line-height: 1.05;
  text-transform: uppercase;
  margin: 1rem 0 0.8rem;
}

.page-about__trust-box p {
  max-width: 72ch;
  color: rgba(248, 249, 250, 0.82);
  margin: 0.8rem 0 0;
}

.page-about__trust-contact {
  font-family: var(--font-data);
  font-size: 0.95rem;
  color: var(--neon-green) !important;
}

.page-about__trust-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2rem;
}

.page-about__trust-links .st-btn-outline {
  border-color: rgba(248, 249, 250, 0.85);
  color: var(--paper-white);
  background: transparent;
}

.page-about__trust-links .st-btn-outline:hover {
  border-color: var(--neon-green);
  color: var(--neon-green);
}

@media (min-width: 768px) {
  .page-about__cap-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about__milestones-grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.65fr);
    gap: 3rem;
  }

  .page-about__milestones-figure {
    position: sticky;
    top: 96px;
  }

  .page-about__team {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 3rem;
    align-items: center;
  }

  .page-about__trust-box {
    padding: 3.5rem;
  }
}

@media (min-width: 1024px) {
  .page-about__hero {
    grid-template-columns: minmax(0, 1.15fr) minmax(320px, 0.85fr);
    gap: 3.5rem;
    padding: 3rem 0 4.5rem;
  }

  .page-about__cap-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about__section-head {
    margin: 5.5rem 0 2.5rem;
  }
}