.page-about {
  --about-hero-glow: rgba(0, 245, 160, 0.16);
  --about-warn-soft: rgba(255, 107, 53, 0.16);
  --about-line-soft: rgba(30, 58, 95, 0.72);
  --about-track: rgba(242, 245, 249, 0.14);
  --about-deep-bg: #060B1A;
}

.page-about .about-section {
  scroll-margin-top: 136px;
}

.page-about .container {
  width: min(100% - 32px, var(--container));
  margin-inline: auto;
}

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

/* ========== 首屏 · 品牌宣言 ========== */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: 44px 0 76px;
  background:
    radial-gradient(circle at 84% 8%, var(--about-hero-glow), transparent 38%),
    linear-gradient(122deg, var(--color-bg-deep) 0%, var(--color-bg) 54%, var(--color-surface) 100%);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(115deg, transparent 0%, transparent 56%, rgba(0, 245, 160, 0.08) 56%, rgba(0, 245, 160, 0.16) 60%, transparent 60%),
    linear-gradient(115deg, transparent 0%, transparent 72%, rgba(255, 107, 53, 0.12) 72%, rgba(255, 107, 53, 0.2) 76%, transparent 76%);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -12%;
  bottom: -20px;
  width: 62%;
  height: 72px;
  background: linear-gradient(90deg, transparent, rgba(255, 107, 53, 0.5), rgba(0, 245, 160, 0.55), transparent);
  clip-path: polygon(0 12%, 100% 0, 96% 100%, 4% 86%);
  opacity: 0.5;
  transform: rotate(-4deg);
  pointer-events: none;
}

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

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

.page-about .breadcrumb a,
.page-about .breadcrumb span {
  color: var(--color-text-dim);
  font-size: 13px;
}

.page-about .breadcrumb a {
  text-decoration: none;
}

.page-about .breadcrumb a:hover {
  color: var(--color-accent);
}

.page-about .hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 14px;
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.page-about .hero-kicker::before {
  content: "";
  width: 26px;
  height: 2px;
  background: currentColor;
  transform: skewX(-24deg);
}

.page-about .about-hero h1 {
  max-width: 960px;
  margin: 0 0 22px;
  color: var(--color-text);
  font-family: var(--font-head);
  font-size: clamp(2rem, 5.4vw, 3.8rem);
  line-height: 1.14;
  letter-spacing: -0.01em;
  transform: skewX(-3deg);
  text-shadow: 0 8px 24px rgba(0, 0, 0, 0.45);
}

.page-about .hero-lead {
  max-width: 640px;
  margin: 0 0 28px;
  color: var(--color-text-dim);
  font-size: clamp(15px, 2vw, 18px);
  line-height: 1.7;
}

.page-about .hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 28px;
}

.page-about .hero-stats span {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  color: var(--color-text-dim);
  font-size: 14px;
}

.page-about .hero-stats strong {
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: clamp(22px, 3vw, 32px);
  line-height: 1;
}

/* ========== 章节目录 ========== */
.page-about .chapter-nav {
  position: relative;
  z-index: 2;
  margin-top: -24px;
  margin-bottom: 0;
}

.page-about .chapter-nav .toc {
  display: flex;
  gap: 6px;
  padding: 8px;
  margin: 0;
  list-style: none;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--about-line-soft);
  border-radius: 14px;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  overflow-x: auto;
  scrollbar-width: none;
}

.page-about .chapter-nav .toc::-webkit-scrollbar {
  display: none;
}

.page-about .chapter-nav .toc-link {
  display: block;
  flex: 0 0 auto;
  padding: 8px 14px;
  color: var(--color-text-dim);
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
  border-radius: 8px;
  transition: background 0.24s ease, color 0.24s ease, transform 0.24s ease;
}

.page-about .chapter-nav .toc-link:hover,
.page-about .chapter-nav .toc-link.is-active {
  color: var(--color-bg-deep);
  background: var(--color-accent);
  transform: translateY(-1px);
}

/* ========== 通用章节间距 ========== */
.page-about .about-section {
  padding: 72px 0;
}

.page-about .section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 14px;
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.14em;
}

.page-about .section-label::before {
  content: "";
  width: 24px;
  height: 2px;
  background: currentColor;
  transform: skewX(-24deg);
}

.page-about .about-section h2 {
  margin: 0 0 18px;
  color: var(--color-text);
  font-family: var(--font-head);
  font-size: clamp(1.5rem, 3.4vw, 2.6rem);
  line-height: 1.22;
  letter-spacing: -0.01em;
}

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

/* ========== 我们的故事 ========== */
.page-about .story-section {
  background:
    radial-gradient(circle at 8% 24%, rgba(0, 245, 160, 0.06), transparent 34%),
    linear-gradient(160deg, var(--color-bg) 0%, #0D1630 100%);
}

.page-about .story-layout {
  display: grid;
  gap: 40px;
}

.page-about .story-copy p + p {
  margin-top: 14px;
}

.page-about .story-copy .btn {
  margin-top: 24px;
}

.page-about .about-visual {
  width: 100%;
  margin: 0;
}

.page-about .media-frame {
  overflow: hidden;
  border-radius: 18px;
  border: 1px solid var(--about-line-soft);
  background: rgba(255, 255, 255, 0.03);
  box-shadow: var(--shadow-card);
}

.page-about .media-frame img {
  display: block;
  width: 100%;
  height: 100%;
}

.page-about .media-frame--portrait img {
  aspect-ratio: 3 / 4;
}

.page-about .media-frame--square img {
  aspect-ratio: 4 / 3;
}

.page-about .media-frame--slanted {
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 24px), calc(100% - 24px) 100%, 0 100%);
  border-radius: 0;
}

.page-about .media-frame--slanted img {
  aspect-ratio: 16 / 9;
}

/* ========== 发展里程碑 ========== */
.page-about .milestone-section {
  background:
    radial-gradient(circle at 92% 18%, rgba(255, 107, 53, 0.12), transparent 30%),
    linear-gradient(180deg, #0D1630 0%, var(--color-bg) 100%);
}

.page-about .milestone-head {
  max-width: 760px;
}

.page-about .milestone-head strong {
  color: var(--color-accent);
  font-weight: 700;
}

.page-about .timeline-wrap {
  margin-top: 38px;
  padding-bottom: 12px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scrollbar-width: thin;
  scrollbar-color: var(--color-line) transparent;
}

.page-about .timeline-h {
  display: flex;
  gap: 18px;
  align-items: stretch;
  margin: 0;
  padding: 12px 4px 18px;
  list-style: none;
  min-width: max-content;
}

.page-about .tl-item {
  position: relative;
  flex: 0 0 252px;
  scroll-snap-align: start;
  transition: transform 0.28s ease;
}

.page-about .tl-item:hover {
  transform: translateY(-4px);
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  top: 22px;
  left: -18px;
  width: 18px;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-accent));
}

.page-about .tl-item:first-child::before {
  display: none;
}

.page-about .tl-node {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 78px;
  height: 36px;
  padding: 0 16px;
  background: linear-gradient(90deg, var(--color-accent), #00C98A);
  color: #071018;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 50%, calc(100% - 14px) 100%, 0 100%, 14px 50%);
  box-shadow: 0 6px 18px rgba(0, 245, 160, 0.2);
}

.page-about .tl-card {
  margin-top: 14px;
  padding: 18px 16px;
  background: rgba(19, 41, 75, 0.78);
  border: 1px solid var(--about-line-soft);
  border-radius: 14px;
  box-shadow: var(--shadow-card);
  transition: background 0.28s ease, border-color 0.28s ease, box-shadow 0.28s ease;
}

.page-about .tl-item:hover .tl-card {
  background: rgba(19, 41, 75, 0.95);
  border-color: rgba(0, 245, 160, 0.42);
  box-shadow: var(--shadow-hover);
}

.page-about .tl-card h3 {
  margin: 0 0 8px;
  color: var(--color-text);
  font-size: 16px;
  font-weight: 700;
}

.page-about .tl-card p {
  margin: 0;
  font-size: 13px;
  line-height: 1.65;
  color: var(--color-text-dim);
}

.page-about .milestone-note {
  display: grid;
  gap: 24px;
  align-items: center;
  margin-top: 34px;
  padding-top: 26px;
  border-top: 1px solid var(--about-line-soft);
}

.page-about .milestone-note p {
  margin: 0;
  max-width: 360px;
}

.page-about .milestone-note .media-frame {
  width: min(100%, 360px);
  margin: 0;
}

/* ========== 团队与规模 ========== */
.page-about .team-section {
  background:
    radial-gradient(circle at 76% 32%, rgba(0, 245, 160, 0.08), transparent 32%),
    linear-gradient(135deg, var(--color-bg) 0%, var(--color-surface) 100%);
}

.page-about .team-head {
  max-width: 720px;
}

.page-about .team-layout {
  display: grid;
  gap: 32px;
  margin-top: 36px;
  align-items: center;
}

.page-about .team-visual {
  width: 100%;
  margin: 0;
}

.page-about .team-visual img {
  aspect-ratio: 4 / 3;
}

.page-about .team-scale {
  display: grid;
  gap: 14px;
}

.page-about .scale-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 16px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--about-line-soft);
  border-radius: 12px;
}

.page-about .scale-row::before {
  content: "";
  width: 6px;
  height: 28px;
  background: linear-gradient(180deg, var(--color-accent), #00B97F);
  clip-path: polygon(0 0, 100% 12%, 100% 88%, 0 100%);
}

.page-about .scale-label {
  flex: 1;
  color: var(--color-text-dim);
  font-size: 14px;
}

.page-about .scale-num {
  color: var(--color-text);
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 700;
  white-space: nowrap;
}

.page-about .team-stats {
  margin-top: 36px;
}

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

.page-about .dash-card {
  position: relative;
  padding: 20px 18px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--about-line-soft);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.page-about .dash-card::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: linear-gradient(180deg, var(--color-accent), var(--color-warn));
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 85%);
  opacity: 0.85;
}

.page-about .dash-label {
  display: block;
  margin-bottom: 10px;
  color: var(--color-text-dim);
  font-size: 13px;
  letter-spacing: 0.04em;
}

.page-about .dash-value {
  display: block;
  color: var(--color-text);
  font-family: var(--font-mono);
  font-size: clamp(26px, 4vw, 36px);
  line-height: 1.1;
}

/* ========== 资质与荣誉 ========== */
.page-about .accreditation-section {
  background:
    radial-gradient(circle at 90% 80%, rgba(255, 107, 53, 0.1), transparent 30%),
    linear-gradient(180deg, var(--color-bg) 0%, #0D1630 100%);
}

.page-about .accred-head {
  max-width: 680px;
}

.page-about .badge-wall {
  display: grid;
  gap: 18px;
  margin-top: 36px;
}

.page-about .badge-item {
  position: relative;
  padding: 28px 22px 24px;
  background: rgba(19, 41, 75, 0.82);
  border: 1px solid var(--about-line-soft);
  border-radius: 20px;
  transition: transform 0.28s ease, border-color 0.28s ease, box-shadow 0.28s ease;
}

.page-about .badge-item::before {
  content: "";
  position: absolute;
  top: -8px;
  right: 18px;
  width: 44px;
  height: 16px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-warn));
  clip-path: polygon(0 50%, 8px 0, calc(100% - 8px) 0, 100% 50%, calc(100% - 8px) 100%, 8px 100%);
  opacity: 0.6;
}

.page-about .badge-item:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 245, 160, 0.4);
  box-shadow: var(--shadow-hover);
}

.page-about .badge-icon {
  width: 46px;
  height: 46px;
  color: var(--color-accent);
  margin-bottom: 14px;
}

.page-about .badge-item h3 {
  margin: 0 0 8px;
  color: var(--color-text);
  font-size: 17px;
  font-weight: 700;
}

.page-about .badge-item p {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--color-text-dim);
}

/* ========== 服务承诺 ========== */
.page-about .commitment-section {
  background:
    radial-gradient(circle at 20% 20%, rgba(255, 107, 53, 0.08), transparent 26%),
    linear-gradient(160deg, var(--color-bg) 0%, var(--color-surface) 100%);
}

.page-about .commit-head {
  max-width: 640px;
}

.page-about .promise-grid {
  display: grid;
  gap: 18px;
  margin-top: 36px;
}

.page-about .promise-card {
  position: relative;
  padding: 24px 20px 22px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--about-line-soft);
  border-radius: 18px;
  overflow: hidden;
  transition: background 0.28s ease, border-color 0.28s ease, transform 0.28s ease;
}

.page-about .promise-card:hover {
  background: rgba(255, 255, 255, 0.07);
  border-color: rgba(255, 107, 53, 0.35);
  transform: translateY(-3px);
}

.page-about .promise-no {
  display: inline-block;
  margin-bottom: 10px;
  color: var(--color-warn);
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  opacity: 0.9;
}

.page-about .promise-card h3 {
  margin: 0 0 10px;
  color: var(--color-text);
  font-size: 18px;
  font-weight: 700;
}

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

.page-about .promise-link {
  display: inline-block;
  margin-top: 14px;
  color: var(--color-accent);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 245, 160, 0.45);
}

.page-about .promise-link:hover {
  color: var(--color-warn);
  border-bottom-color: currentColor;
}

/* ========== 联系我们 CTA ========== */
.page-about .contact-cta {
  display: grid;
  gap: 24px;
  margin-top: 44px;
  padding: 28px 24px;
  background:
    linear-gradient(120deg, rgba(19, 41, 75, 0.88), rgba(6, 11, 26, 0.92)),
    radial-gradient(circle at 86% 8%, rgba(0, 245, 160, 0.12), transparent 40%);
  border: 1px solid var(--about-line-soft);
  border-radius: 22px;
  box-shadow: var(--shadow-card);
}

.page-about .cta-copy h3 {
  margin: 0 0 10px;
  color: var(--color-text);
  font-size: 20px;
}

.page-about .cta-copy p {
  margin: 0 0 18px;
  font-size: 14px;
  line-height: 1.7;
}

.page-about .cta-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
  justify-content: center;
}

.page-about .cta-links a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--color-accent);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  transition: color 0.24s ease, transform 0.24s ease;
}

.page-about .cta-links a::before {
  content: "";
  width: 18px;
  height: 8px;
  background: currentColor;
  clip-path: polygon(0 50%, 60% 0, 100% 50%, 60% 100%);
  opacity: 0.5;
}

.page-about .cta-links a:hover {
  color: var(--color-warn);
  transform: translateX(4px);
}

/* ========== 移动优先增强 ========== */
@media (min-width: 720px) {
  .page-about .about-hero {
    padding: 64px 0 96px;
  }

  .page-about .story-layout {
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 48px;
  }

  .page-about .milestone-note {
    grid-template-columns: 1fr 1fr;
  }

  .page-about .team-layout {
    grid-template-columns: 1fr 1fr;
  }

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

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

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

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

  .page-about .cta-links {
    align-items: flex-end;
  }
}

@media (min-width: 1080px) {
  .page-about .about-hero {
    padding: 80px 0 120px;
  }

  .page-about .chapter-nav .toc {
    width: fit-content;
    margin-inline: auto;
  }

  .page-about .about-section {
    padding: 100px 0;
  }

  .page-about .story-copy p {
    max-width: 56ch;
  }

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

  .page-about .badge-wall {
    grid-template-columns: repeat(4, 1fr);
    gap: 22px;
  }

  .page-about .promise-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 22px;
  }

  .page-about .team-layout {
    gap: 56px;
  }

  .page-about .timeline-h {
    gap: 26px;
  }

  .page-about .tl-item {
    flex-basis: 280px;
  }
}