/* ===== 品牌档案 /company/ ===== */

.page-about {
  --page-linear: linear-gradient(90deg, var(--color-accent) 0%, var(--color-gold) 48%, var(--color-info) 100%);
  background: var(--color-primary);
  color: var(--color-text);
  overflow-x: hidden;
}

.page-about ::selection {
  background: var(--color-accent);
  color: var(--color-black);
}

.page-about figure {
  margin: 0;
}

.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--font-heading);
  color: var(--color-text);
  letter-spacing: -0.01em;
}

.page-about h1 {
  font-size: 2.3rem;
  line-height: 1.25;
  margin: 0 0 1.5rem;
  max-width: 15em;
}

.page-about h2 {
  font-size: 1.7rem;
  line-height: 1.28;
  margin-bottom: 1rem;
}

.page-about h3 {
  font-size: 1.1rem;
  line-height: 1.35;
  margin-bottom: 0.5rem;
}

.page-about p {
  font-family: var(--font-body);
  color: var(--color-muted);
  line-height: 1.85;
  margin-bottom: 1rem;
  font-size: 1rem;
}

.page-about .lead {
  color: var(--color-text);
  font-size: 1.06rem;
  line-height: 1.9;
  max-width: 720px;
}

.page-about .section {
  padding-top: 3.5rem;
  padding-bottom: 3.5rem;
}

.page-about .section-index {
  display: inline-flex;
  align-items: baseline;
  gap: 0.4rem;
  font-family: var(--font-heading);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-gold);
  border-left: 3px solid var(--color-accent);
  padding-left: 0.75rem;
  margin: 0 0 1.25rem;
  line-height: 1.5;
}

.page-about .section-index span {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--color-accent);
}

.page-about .section-desc {
  color: var(--color-muted);
  font-size: 0.98rem;
  line-height: 1.8;
  max-width: 620px;
}

.page-about a:not([class]) {
  color: var(--color-info);
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-thickness: 1px;
}

.page-about a:not([class]):hover,
.page-about a:not([class]):focus {
  color: var(--color-accent);
}

.page-about .btn {
  text-decoration: none;
}

/* ---- 首屏 ---- */

.page-about .about-hero {
  padding-top: calc(var(--header-h) + 2rem);
  padding-bottom: 2.75rem;
  background:
    radial-gradient(circle at 84% 8%, rgba(255, 107, 53, 0.18), transparent 46%),
    linear-gradient(180deg, var(--color-primary) 0%, var(--color-black) 100%);
  border-bottom: 1px solid var(--color-border);
}

.page-about .about-hero-body {
  position: relative;
  padding: 1.4rem 0 2.25rem;
  border-top: 4px solid var(--color-accent);
}

.page-about .about-hero-body::before {
  content: '';
  position: absolute;
  right: 0;
  top: -4px;
  height: 4px;
  width: 32%;
  background: var(--color-gold);
}

.page-about .about-hero-body::after {
  content: '';
  position: absolute;
  right: 0;
  bottom: 1.5rem;
  width: 26px;
  height: 26px;
  border-right: 2px solid var(--color-info);
  border-bottom: 2px solid var(--color-info);
  opacity: 0.55;
  pointer-events: none;
}

.page-about .h1-sub {
  display: block;
  font-size: 0.68em;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--color-gold);
  margin-top: 0.35rem;
}

.page-about .hero-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.8rem;
  margin-top: 2rem;
  max-width: 620px;
}

.page-about .hero-stat {
  background: rgba(22, 39, 61, 0.72);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-accent);
  border-radius: var(--radius);
  padding: 0.8rem 0.9rem;
}

.page-about .hero-stat strong {
  display: block;
  font-family: var(--font-heading);
  font-size: 1.45rem;
  line-height: 1.1;
  color: var(--color-accent);
  margin-bottom: 0.3rem;
}

.page-about .hero-stat span {
  display: block;
  font-size: 0.78rem;
  line-height: 1.4;
  color: var(--color-muted);
}

/* ---- 品牌简介 ---- */

.page-about .about-profile {
  background: var(--color-primary);
}

.page-about .about-profile-grid {
  display: grid;
  gap: 2rem;
  align-items: center;
}

.page-about .about-profile-text .lead {
  margin-bottom: 1.2rem;
}

.page-about .profile-list {
  list-style: none;
  margin: 1.6rem 0 0;
  padding: 0;
}

.page-about .profile-list li {
  position: relative;
  padding: 0 0 0.85rem 1.5rem;
  font-family: var(--font-heading);
  font-size: 0.95rem;
  line-height: 1.65;
  color: var(--color-text);
}

.page-about .profile-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.35em;
  width: 8px;
  height: 8px;
  transform: rotate(45deg);
  background: var(--color-accent);
}

.page-about .profile-list em {
  font-style: normal;
  font-weight: 700;
  color: var(--color-gold);
}

.page-about .about-profile-media {
  max-width: 400px;
  margin: 0 auto;
}

.page-about .about-profile-media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-profile-media figcaption,
.page-about .milestone-band figcaption,
.page-about .eco-figure figcaption {
  font-size: 0.8rem;
  line-height: 1.5;
  color: var(--color-muted);
  padding: 0.75rem 0.25rem 0.1rem;
  border-top: 1px solid var(--color-border);
}

/* ---- 发展里程碑 ---- */

.page-about .about-milestones {
  background: var(--color-black);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.page-about .milestone-header {
  position: relative;
  padding-bottom: 0.5rem;
}

.page-about .milestone-header::after {
  content: '';
  display: block;
  width: 100%;
  max-width: 150px;
  height: 4px;
  margin-top: 1rem;
  background: var(--page-linear);
}

.page-about .milestone-band {
  margin: 2rem 0 2.5rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--color-surface);
}

.page-about .milestone-band img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .milestone-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .milestone-item {
  position: relative;
  padding: 0 0 2rem 1.7rem;
}

.page-about .milestone-item::before {
  content: '';
  position: absolute;
  left: 5px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--color-accent) 0%, var(--color-gold) 55%, var(--color-info) 100%);
  opacity: 0.45;
}

.page-about .milestone-item:last-child {
  padding-bottom: 0;
}

.page-about .milestone-item:last-child::before {
  bottom: auto;
  height: 0.6rem;
}

.page-about .milestone-year {
  position: relative;
  z-index: 1;
  display: inline-flex;
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--color-accent);
  background: var(--color-black);
  border: 1px solid var(--color-border);
  border-radius: 2px;
  padding: 0.2rem 0.75rem;
}

.page-about .milestone-node {
  position: absolute;
  left: 0;
  top: 0.5rem;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 0 4px rgba(255, 107, 53, 0.16);
  z-index: 1;
}

.page-about .milestone-panel {
  position: relative;
  z-index: 1;
  margin-top: 0.7rem;
  background: rgba(22, 39, 61, 0.72);
  border: 1px solid var(--color-border);
  border-radius: calc(var(--radius) + 1px);
  padding: 1.05rem 1.2rem 1.1rem;
}

.page-about .milestone-panel h3 {
  margin-bottom: 0.5rem;
}

.page-about .milestone-panel p {
  font-size: 0.94rem;
  line-height: 1.75;
  margin-bottom: 0;
}

/* ---- 平台规模 ---- */

.page-about .about-scale {
  background: var(--color-black);
  border-bottom: 1px solid var(--color-border);
}

.page-about .scale-heading {
  max-width: 640px;
  margin-bottom: 2rem;
}

.page-about .scale-note {
  color: var(--color-muted);
  margin-bottom: 0;
}

.page-about .scale-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.85rem;
}

.page-about .stat-item {
  background: var(--color-surface);
  border-radius: var(--radius);
  border-left: 3px solid var(--color-gold);
  padding: 1.1rem 0.9rem 1rem;
}

.page-about .stat-item:nth-child(2),
.page-about .stat-item:nth-child(5) {
  border-left-color: var(--color-info);
}

.page-about .stat-item:nth-child(3),
.page-about .stat-item:nth-child(6) {
  border-left-color: var(--color-accent);
}

.page-about .stat-num {
  display: block;
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 800;
  line-height: 1;
  color: var(--color-gold);
  margin-bottom: 0.45rem;
}

.page-about .stat-desc {
  display: block;
  font-size: 0.82rem;
  line-height: 1.45;
  color: var(--color-muted);
}

.page-about .scale-footnote {
  margin-top: 1.75rem;
  font-size: 0.88rem;
  color: var(--color-muted);
  max-width: 640px;
}

/* ---- 合规与认证 ---- */

.page-about .about-compliance {
  background: var(--color-primary);
}

.page-about .compliance-wrap {
  display: grid;
  gap: 2.5rem;
}

.page-about .compliance-main {
  max-width: 680px;
}

.page-about .compliance-cards {
  display: grid;
  gap: 1rem;
}

.page-about .compliance-card {
  position: relative;
  background: linear-gradient(160deg, var(--color-surface) 0%, rgba(22, 39, 61, 0.55) 100%);
  border: 1px solid var(--color-border);
  border-radius: calc(var(--radius) + 2px);
  padding: 1.3rem 1.2rem 1.15rem;
  transition: transform 0.18s ease, border-color 0.18s ease;
}

.page-about .compliance-card:hover,
.page-about .compliance-card:focus-within {
  transform: translateY(-3px);
  border-color: var(--color-accent);
}

.page-about .compliance-card .card-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background: rgba(255, 107, 53, 0.12);
  color: var(--color-accent);
  font-size: 1rem;
}

.page-about .compliance-card h3 {
  margin-top: 0.8rem;
}

.page-about .compliance-card p {
  font-size: 0.92rem;
  line-height: 1.7;
  margin-bottom: 0;
}

/* ---- 合作生态 ---- */

.page-about .about-ecosystem {
  position: relative;
}

.page-about .eco-grid {
  display: grid;
  gap: 1.75rem;
}

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

.page-about .eco-figure {
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
  padding: 0.5rem;
}

.page-about .eco-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: calc(var(--radius) - 1px);
}

.page-about .eco-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 1.5rem;
}

/* ---- 信任声明 ---- */

.page-about .about-trust {
  background: var(--color-black);
  border-top: 1px solid var(--color-border);
}

.page-about .trust-card {
  max-width: 760px;
  margin: 0 auto;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-top: 4px solid var(--color-gold);
  border-radius: var(--radius);
  padding: 2rem 1.5rem 1.5rem;
  text-align: center;
}

.page-about .trust-mark {
  display: inline-block;
  width: 2.6rem;
  height: 2.6rem;
  line-height: 2.6rem;
  text-align: center;
  border-radius: 50%;
  background: rgba(255, 107, 53, 0.14);
  color: var(--color-accent);
  font-size: 1rem;
  margin-bottom: 0.9rem;
}

.page-about .trust-card h2 {
  font-size: 1.5rem;
}

.page-about .trust-card p {
  max-width: 560px;
  margin: 0 auto 0.5rem;
}

.page-about .trust-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
  margin-top: 1.25rem;
}

/* ---- Tablet 768px ---- */

@media (min-width: 768px) {
  .page-about .section {
    padding-top: 5rem;
    padding-bottom: 5rem;
  }

  .page-about .about-hero {
    padding-top: calc(var(--header-h) + 3rem);
    padding-bottom: 4rem;
  }

  .page-about h1 {
    font-size: 3rem;
    line-height: 1.18;
  }

  .page-about h2 {
    font-size: 2rem;
  }

  .page-about .lead {
    font-size: 1.1rem;
  }

  .page-about .hero-stats {
    grid-template-columns: repeat(4, 1fr);
    max-width: none;
  }

  .page-about .about-profile-grid {
    grid-template-columns: 1.25fr 0.75fr;
    gap: 3rem;
  }

  .page-about .about-profile-media {
    margin: 0;
    justify-self: end;
  }

  .page-about .milestone-item {
    padding-left: 2.2rem;
  }

  .page-about .milestone-item::before {
    left: 6px;
  }

  .page-about .milestone-panel {
    padding: 1.3rem 1.6rem 1.35rem;
  }

  .page-about .scale-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
  }

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

  .page-about .trust-card {
    padding: 2.5rem 2rem 1.75rem;
  }
}

/* ---- Desktop 1024px ---- */

@media (min-width: 1024px) {
  .page-about .section {
    padding-top: 6rem;
    padding-bottom: 6rem;
  }

  .page-about .about-hero-body {
    padding-top: 2.5rem;
  }

  .page-about .about-profile-grid {
    grid-template-columns: 1fr 0.72fr;
    gap: 4rem;
  }

  .page-about .scale-grid {
    grid-template-columns: repeat(6, 1fr);
    gap: 1.1rem;
  }

  .page-about .stat-item {
    padding: 1.5rem 1.1rem 1.2rem;
  }

  .page-about .stat-num {
    font-size: 2.5rem;
  }

  .page-about .compliance-wrap {
    grid-template-columns: 0.9fr 1.1fr;
    align-items: center;
    gap: 4rem;
  }

  .page-about .eco-grid {
    grid-template-columns: 0.8fr 1.2fr;
    grid-template-areas:
      "head figure"
      "info figure";
    column-gap: 3.5rem;
  }

  .page-about .eco-head {
    grid-area: head;
    margin-bottom: 1.5rem;
  }

  .page-about .eco-figure {
    grid-area: figure;
    align-self: center;
  }

  .page-about .eco-info {
    grid-area: info;
    align-self: end;
  }
}