.page-about {
  --grass-dot: rgba(198, 255, 0, 0.18);
  --grass-line: rgba(46, 139, 87, 0.28);
  --section-space: 72px;
  color: var(--text-color);
  overflow: hidden;
}
.page-about .container {
  max-width: var(--content-width);
  margin-inline: auto;
  padding-inline: 20px;
}
.page-about .section {
  padding-block: var(--section-space);
}
.page-about .section--dark {
  background: var(--night-blue-black);
  color: rgba(245, 247, 250, 0.86);
}
.page-about .section--tinted {
  background: var(--light-background);
}
.page-about .section-head {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 32px;
}
.page-about .section-head__index {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--metal-gray);
  text-transform: uppercase;
}
.page-about .section--dark .section-head__index {
  color: var(--fluorescent-yellow-green);
}
.page-about .section-head__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 900;
  line-height: 1.2;
}
.page-about .section--dark .section-head__title {
  color: var(--light-background);
}
.page-about .container .prose p {
  margin: 0 0 16px;
  line-height: 1.9;
  font-size: 16px;
}

/* 面包屑 */
.page-about__topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 18px;
  border-bottom: 1px solid var(--border-color);
}
.page-about__topbar .breadcrumbs {
  font-size: 14px;
  color: var(--metal-gray);
}
.page-about__topbar .breadcrumbs a {
  color: var(--deep-green);
  text-decoration: none;
}
.page-about__topbar-link {
  font-size: 14px;
  color: var(--deep-green);
  text-decoration: none;
  border-bottom: 1px dashed var(--primary-green);
  padding-bottom: 2px;
}

/* 首屏 */
.page-about__hero {
  background:
    radial-gradient(circle at 82% 22%, var(--grass-dot), transparent 24%),
    radial-gradient(circle at 72% 70%, rgba(198, 255, 0, 0.08), transparent 32%),
    linear-gradient(135deg, var(--night-blue-black) 0%, var(--dark-blue) 55%, var(--deep-green) 120%);
  position: relative;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 34px), 0 100%);
  padding-block: 56px 96px;
}
.page-about__hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(0deg, transparent 0, transparent 31px, rgba(46, 139, 87, 0.09) 31px, rgba(46, 139, 87, 0.09) 32px);
  pointer-events: none;
}
.page-about__hero-inner {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: 36px;
}
.page-about__hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--fluorescent-yellow-green);
}
.page-about__hero-kicker-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--china-red);
  box-shadow: 0 0 0 4px rgba(200, 16, 46, 0.28);
}
.page-about__hero-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 8.4vw, 4.6rem);
  font-weight: 900;
  line-height: 1.18;
  color: var(--light-background);
  text-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
}
.page-about__hero-lead {
  margin: 20px 0 0;
  max-width: 640px;
  font-size: 16px;
  line-height: 1.9;
  color: rgba(245, 247, 250, 0.82);
}
.page-about__hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}
.page-about__hero-actions .btn--primary {
  background: var(--primary-green);
  border-color: var(--primary-green);
  color: #fff;
  transition: background 0.3s ease, transform 0.2s ease;
}
.page-about__hero-actions .btn--primary:hover {
  background: var(--deep-green);
  transform: translateY(-2px);
}
.page-about__hero-actions .btn--ghost {
  border-color: rgba(245, 247, 250, 0.5);
  color: var(--light-background);
  transition: border-color 0.3s ease, color 0.3s ease;
}
.page-about__hero-actions .btn--ghost:hover {
  border-color: var(--fluorescent-yellow-green);
  color: var(--fluorescent-yellow-green);
}
.page-about__hero-panel {
  background: rgba(11, 27, 42, 0.75);
  border: 1px solid rgba(198, 255, 0, 0.24);
  border-radius: 4px;
  padding: 24px;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.36);
}
.page-about__hero-panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}
.page-about__hero-panel-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--metal-gray);
}
.page-about__hero-panel-live {
  position: relative;
  padding-left: 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--fluorescent-yellow-green);
}
.page-about__hero-panel-live::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--china-red);
  animation: page-about-pulse 1.8s infinite;
}
@keyframes page-about-pulse {
  0%, 100% {
    box-shadow: 0 0 0 0 rgba(200, 16, 46, 0.7);
  }
  55% {
    box-shadow: 0 0 0 8px rgba(200, 16, 46, 0);
  }
}
.page-about__hero-stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  margin: 0;
}
.page-about__hero-stat dt {
  font-size: 13px;
  color: var(--metal-gray);
  margin-bottom: 4px;
}
.page-about__hero-stat dd {
  margin: 0;
}
.page-about__hero-stat .stat-digit {
  font-family: var(--font-mono);
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--fluorescent-yellow-green);
  line-height: 1.2;
}
.page-about__stat-unit {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--fluorescent-yellow-green);
  margin-left: 2px;
}
.page-about__hero-stat-sub {
  font-size: 12px;
  color: rgba(245, 247, 250, 0.55);
  margin-top: 2px;
}
.page-about__hero-ticker {
  position: relative;
  z-index: 1;
  margin-top: 36px;
  display: flex;
  gap: 28px;
  overflow: hidden;
  white-space: nowrap;
  border-top: 1px solid rgba(198, 255, 0, 0.18);
  padding-top: 18px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: rgba(245, 247, 250, 0.72);
}
.page-about__hero-ticker span::before {
  content: "# ";
  color: var(--china-red);
}

/* 页内目录 */
.page-about__index {
  background: var(--light-background);
  border-bottom: 1px solid var(--border-color);
}
.page-about__index-title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--metal-gray);
  text-transform: uppercase;
}
.page-about__index-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
}
.page-about__index-list a {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 10px 0;
  text-decoration: none;
  color: var(--text-color);
  font-weight: 600;
  font-size: 16px;
  border-bottom: 1px dashed rgba(11, 27, 42, 0.1);
  transition: color 0.2s ease, padding-left 0.2s ease;
}
.page-about__index-list a span {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--primary-green);
}
.page-about__index-list a:hover {
  color: var(--deep-green);
  padding-left: 6px;
}

/* 品牌缘起 */
.page-about__origin-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  align-items: start;
}
.page-about__origin-copy .prose {
  margin-top: 20px;
}
.page-about__origin-quote {
  margin: 28px 0 0;
  padding: 18px 22px;
  border-left: 4px solid var(--fluorescent-yellow-green);
  background: linear-gradient(90deg, rgba(198, 255, 0, 0.1), rgba(198, 255, 0, 0.02));
  border-radius: 0 6px 6px 0;
}
.page-about__origin-quote p {
  margin: 0;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 800;
  color: var(--deep-green);
}
.page-about__origin-quote cite {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  font-style: normal;
  color: var(--metal-gray);
}
.page-about__origin-figure {
  margin: 0;
}
.page-about .figure img {
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: 4px;
  box-shadow: 0 12px 36px rgba(11, 27, 42, 0.22);
}
.page-about__origin-figure .figure__caption {
  font-size: 13px;
  color: var(--metal-gray);
  margin-top: 12px;
}

/* 里程碑 */
.page-about__section-slogan {
  margin: 10px 0 0;
  font-size: 15px;
  color: var(--metal-gray);
  line-height: 1.7;
}
.page-about .section--dark .page-about__section-slogan {
  color: rgba(245, 247, 250, 0.62);
}
.page-about__timeline {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 24px;
  margin-top: 40px;
}
.page-about__timeline::before {
  content: "";
  position: absolute;
  left: 14px;
  top: 12px;
  bottom: 12px;
  width: 1px;
  background: repeating-linear-gradient(0deg, var(--fluoro-line) 0, var(--fluoro-line) 8px, transparent 8px, transparent 14px), radial-gradient(circle at center, rgba(198, 255, 0, 0.5) 0, transparent 42%);
  background-color: rgba(198, 255, 0, 0.32);
}
.page-about__milestone {
  position: relative;
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 14px;
}
.page-about__milestone-node {
  display: flex;
  justify-content: flex-start;
  padding-top: 20px;
}
.page-about__milestone-dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--fluorescent-yellow-green);
  border: 3px solid var(--night-blue-black);
  box-shadow: 0 0 0 2px var(--fluorescent-yellow-green), 0 0 18px rgba(198, 255, 0, 0.4);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.page-about__milestone-card {
  padding: 22px;
  background: rgba(245, 247, 250, 0.04);
  border: 1px solid rgba(245, 247, 250, 0.1);
  border-radius: 4px;
  transition: border-color 0.3s ease, background 0.3s ease, transform 0.3s ease;
}
.page-about__milestone-card:hover {
  border-color: rgba(198, 255, 0, 0.45);
  background: rgba(198, 255, 0, 0.06);
  transform: translateX(4px);
}
.page-about__milestone-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}
.page-about .tag--accent {
  background: var(--fluorescent-yellow-green);
  color: var(--night-blue-black);
  font-family: var(--font-mono);
  font-size: 11px;
}
.page-about__milestone-name {
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--metal-gray);
  font-weight: 600;
}
.page-about__milestone-title {
  margin: 0 0 8px;
  font-size: 20px;
  font-weight: 900;
  color: var(--light-background);
  line-height: 1.35;
}
.page-about .section--dark .page-about__milestone-desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: rgba(245, 247, 250, 0.75);
}
.page-about .section--dark .page-about__milestone-desc a {
  color: var(--fluorescent-yellow-green);
  text-decoration: none;
}

/* 数据能力 */
.page-about__capability .section-head {
  margin-bottom: 36px;
}
.page-about__pipe {
  display: flex;
  flex-direction: column;
  gap: 12px;
  background: var(--light-background);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 28px 24px;
  margin-bottom: 44px;
}
.page-about__pipe-step {
  display: grid;
  grid-template-columns: 32px 1fr;
  grid-template-areas:
    "num name"
    "num desc";
  column-gap: 12px;
  align-items: start;
}
.page-about__pipe-num {
  grid-area: num;
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 700;
  color: var(--primary-green);
}
.page-about__pipe-name {
  grid-area: name;
  font-size: 18px;
  font-weight: 900;
  color: var(--deep-green);
}
.page-about__pipe-desc {
  grid-area: desc;
  margin: 4px 0 0;
  font-size: 14px;
  color: var(--metal-gray);
}
.page-about__pipe-arrow {
  display: block;
  padding-left: 34px;
  font-family: var(--font-mono);
  color: var(--china-red);
  font-size: 18px;
  line-height: 1;
}
.page-about__capability-grid {
  gap: 16px;
}
.page-about .card {
  padding: 26px 24px;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  background: #fff;
  box-shadow: 0 4px 18px rgba(11, 27, 42, 0.04);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}
.page-about .card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(11, 27, 42, 0.1);
  border-color: var(--primary-green);
}
.page-about .tag--red {
  display: inline-block;
  background: rgba(200, 16, 46, 0.09);
  color: var(--china-red);
  font-size: 12px;
  padding: 4px 10px;
  border-radius: 999px;
  letter-spacing: 0.06em;
  margin-bottom: 14px;
  font-family: var(--font-mono);
}
.page-about__card-title {
  margin: 0 0 10px;
  font-size: 20px;
  font-weight: 900;
  color: var(--deep-green);
  line-height: 1.35;
}
.page-about__card-text {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-color);
}

/* 团队 */
.page-about__team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  align-items: center;
}
.page-about__team-figure {
  margin: 0;
}
.page-about__team-bars {
  display: flex;
  flex-direction: column;
  gap: 18px;
  margin-top: 24px;
}
.page-about__team-bar-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-size: 14px;
  margin-bottom: 6px;
}
.page-about__team-bar-head span {
  font-weight: 600;
  color: var(--text-color);
}
.page-about__team-bar-head strong {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--primary-green);
}
.page-about__team-bar-track {
  height: 10px;
  border-radius: 999px;
  background: rgba(11, 27, 42, 0.07);
  overflow: hidden;
}
.page-about__team-bar-fill {
  display: block;
  height: 100%;
  border-radius: 999px;
}
.page-about__team-bar-fill--engineer {
  width: 40%;
  background: var(--primary-green);
}
.page-about__team-bar-fill--design {
  width: 20%;
  background: var(--fluorescent-yellow-green);
}
.page-about__team-bar-fill--ops {
  width: 40%;
  background: linear-gradient(90deg, var(--china-red), var(--metal-gray));
}

/* 用户与认可 */
.page-about__recognition .section-head {
  margin-bottom: 40px;
}
.page-about__recognition-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}
.page-about__recognition-stat {
  border: 1px solid rgba(198, 255, 0, 0.2);
  border-radius: 4px;
  padding: 28px 24px;
  text-align: center;
  background: rgba(198, 255, 0, 0.04);
}
.page-about__recognition-stat .stat-digit {
  display: block;
  font-family: var(--font-mono);
  font-size: 4rem;
  font-weight: 700;
  line-height: 1.1;
  color: var(--fluorescent-yellow-green);
}
.page-about__recognition-stat .stat-label {
  display: block;
  margin-top: 8px;
  font-size: 15px;
  color: rgba(245, 247, 250, 0.8);
}
.page-about__recognition-award {
  grid-column: 1 / -1;
  padding: 32px 24px;
  text-align: center;
  background: linear-gradient(135deg, rgba(198, 255, 0, 0.1), rgba(46, 139, 87, 0.16));
  border: 1px solid rgba(198, 255, 0, 0.36);
  border-radius: 4px;
}
.page-about__award-mark {
  display: block;
  font-size: 2.4rem;
  color: var(--fluorescent-yellow-green);
  margin-bottom: 6px;
}
.page-about__award-text {
  margin: 0 0 6px;
  font-size: 14px;
  color: var(--metal-gray);
}
.page-about__award-title {
  margin: 0 0 4px;
  font-size: 24px;
  font-weight: 900;
  color: var(--light-background);
}
.page-about__award-sub {
  margin: 0;
  font-size: 13px;
  color: rgba(245, 247, 250, 0.55);
}
.page-about__recognition-note {
  margin-top: 28px;
  padding-top: 24px;
  border-top: 1px solid rgba(245, 247, 250, 0.1);
  font-size: 15px;
  line-height: 1.85;
  color: rgba(245, 247, 250, 0.72);
}
.page-about__recognition-note a {
  color: var(--fluorescent-yellow-green);
  text-decoration: none;
  border-bottom: 1px dashed rgba(198, 255, 0, 0.45);
}
.page-about__recognition-note a:hover {
  color: var(--light-background);
}

/* 结尾 */
.page-about__outlook {
  background: linear-gradient(180deg, var(--light-background), rgba(46, 139, 87, 0.1));
}
.page-about__outlook-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
}
.page-about__outlook-figure {
  margin: 0;
}
.page-about__outlook-content {
  padding: 8px 4px;
}
.page-about__outlook-kicker {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--primary-green);
  text-transform: uppercase;
}
.page-about__outlook-title {
  margin: 0 0 16px;
  font-size: clamp(1.6rem, 3.8vw, 2.4rem);
  font-weight: 900;
  line-height: 1.3;
  color: var(--deep-green);
}
.page-about__outlook-text {
  margin: 0 0 24px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--text-color);
}
.page-about__outlook-text a {
  color: var(--primary-green);
  font-weight: 700;
  text-decoration: none;
}
.page-about__contact-card {
  padding: 28px 24px;
  border: 1px solid var(--border-color);
  border-left: 4px solid var(--fluorescent-yellow-green);
  background: #fff;
  box-shadow: 0 8px 28px rgba(11, 27, 42, 0.06);
}
.page-about__contact-title {
  margin: 0 0 14px;
  font-size: 18px;
  font-weight: 900;
  color: var(--deep-green);
}
.page-about__contact-list {
  list-style: none;
  margin: 0 0 14px;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.page-about__contact-list li {
  display: flex;
  flex-direction: column;
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--text-color);
  word-break: break-all;
}
.page-about__contact-list span {
  font-family: var(--font-body);
  font-size: 12px;
  color: var(--metal-gray);
  margin-bottom: 2px;
}
.page-about__contact-note {
  margin: 0 0 20px;
  font-size: 13px;
  line-height: 1.75;
  color: var(--metal-gray);
}
.page-about__contact-cta {
  display: inline-block;
}

/* 桌面端布局 */
@media (min-width: 768px) {
  .page-about {
    --section-space: 100px;
  }
  .page-about .container {
    padding-inline: 32px;
  }
  .page-about__index-list {
    grid-template-columns: repeat(5, 1fr);
    gap: 16px;
  }
  .page-about__index-list a {
    flex-direction: column;
    gap: 6px;
    align-items: flex-start;
    padding: 14px 12px;
    border-bottom: none;
    background: rgba(46, 139, 87, 0.04);
    border-radius: 4px;
  }
  .page-about__hero-inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
  .page-about__hero-main {
    flex: 1.1;
  }
  .page-about__hero-panel {
    flex: 0.9;
    margin-left: 48px;
  }
  .page-about__hero-stats {
    grid-template-columns: 1fr;
  }
  .page-about__hero-title {
    font-size: clamp(2.6rem, 5vw, 4.4rem);
  }
  .page-about__hero-lead {
    font-size: 17px;
    max-width: 620px;
  }
  .page-about__origin-grid {
    grid-template-columns: 1.05fr 0.95fr;
    gap: 64px;
    align-items: center;
  }
  .page-about__origin-figure {
    margin-top: 12px;
  }
  .page-about__timeline {
    padding-left: 0;
  }
  .page-about__timeline::before {
    left: 50%;
    transform: translateX(-50%);
  }
  .page-about__milestone {
    grid-template-columns: 1fr 40px 1fr;
    gap: 0;
    align-items: center;
  }
  .page-about__milestone-node {
    grid-column: 2;
    justify-content: center;
    padding: 0;
  }
  .page-about__milestone:nth-child(odd) .page-about__milestone-card {
    grid-column: 1;
    grid-row: 1;
    text-align: right;
  }
  .page-about__milestone:nth-child(odd) .page-about__milestone-meta {
    justify-content: flex-end;
  }
  .page-about__milestone:nth-child(even) .page-about__milestone-card {
    grid-column: 3;
    grid-row: 1;
  }
  .page-about__milestone-card:hover {
    transform: translateY(-4px);
  }
  .page-about__pipe {
    flex-direction: row;
    align-items: stretch;
    justify-content: space-between;
    gap: 8px;
    padding: 36px 28px;
  }
  .page-about__pipe-step {
    flex: 1;
    display: block;
    text-align: center;
  }
  .page-about__pipe-num {
    font-size: 32px;
  }
  .page-about__pipe-name {
    display: block;
    margin-top: 8px;
  }
  .page-about__pipe-desc {
    margin-top: 6px;
  }
  .page-about__pipe-arrow {
    align-self: center;
    padding: 0;
  }
  .page-about__team-grid {
    grid-template-columns: 1fr 1fr;
    gap: 64px;
  }
  .page-about__recognition-grid {
    grid-template-columns: 1fr 1fr 1.2fr;
    gap: 20px;
    align-items: stretch;
  }
  .page-about__recognition-award {
    grid-column: auto;
  }
  .page-about__outlook-inner {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 56px;
    align-items: center;
  }
  .page-about__contact-list li {
    flex-direction: row;
    justify-content: space-between;
    gap: 16px;
  }
}

@media (min-width: 1200px) {
  .page-about .container {
    padding-inline: 40px;
  }
  .page-about__hero-panel {
    padding: 32px;
  }
  .page-about__hero-stats {
    grid-template-columns: 1fr;
  }
  .page-about__hero-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
  }
  .page-about__capability-grid {
    gap: 24px;
  }
  .page-about__milestone-card {
    padding: 30px;
  }
}

.page-about {
  --fluoro-line: transparent;
}