/* ============================================================
   品牌愿景 /mission/ · 页面专属样式
   ============================================================ */

.page-about {
  --about-node: 34px;
  --about-line-gap: 14px;
  display: block;
}

/* ---------------- 面包屑 ---------------- */
.page-about .breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 18px;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
}

.page-about .breadcrumbs li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--rock);
}

.page-about .breadcrumbs li + li::before {
  content: "/";
  color: var(--orbit);
}

.page-about .breadcrumbs a {
  color: var(--progress);
  text-decoration: none;
}

.page-about .breadcrumbs a:hover,
.page-about .breadcrumbs a:focus-visible {
  color: var(--bone);
  text-decoration: underline;
}

.page-about .breadcrumbs [aria-current="page"] {
  color: var(--sand);
}

/* ---------------- 首屏 ---------------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: 26px 18px 22px;
  border: 1px solid var(--orbit);
  border-radius: var(--radius);
  background:
    radial-gradient(120% 95% at 8% -12%, rgba(62, 193, 211, .18), transparent 58%),
    radial-gradient(90% 70% at 100% 0%, rgba(255, 107, 53, .12), transparent 62%),
    linear-gradient(162deg, var(--space-2) 0%, var(--space-deep) 74%);
  box-shadow: inset 0 1px 0 rgba(244, 240, 230, .07), 0 30px 70px -54px #000;
}

.page-about .about-hero h1 {
  margin: 12px 0 14px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(27px, 7.4vw, 52px);
  line-height: 1.16;
  letter-spacing: -.012em;
  color: var(--bone);
}

.page-about .about-hero__lede {
  max-width: 68ch;
  margin: 0;
  font-size: clamp(15px, 3.6vw, 17px);
  line-height: 1.9;
  color: var(--mist);
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 22px 0 24px;
  padding: 0;
  list-style: none;
}

.page-about .about-hero__facts li {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 12px 14px;
  border: 1px solid var(--orbit);
  border-radius: var(--radius-sm);
  background: rgba(11, 27, 58, .58);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .04em;
  color: var(--rock);
}

.page-about .about-hero__facts .num {
  font-size: clamp(22px, 6vw, 28px);
  line-height: 1.05;
}

.page-about .about-hero__figure {
  margin: 0;
}

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

/* ---------------- 快速定位 ---------------- */
.page-about .about-index {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 18px 0 0;
  padding: 0;
}

.page-about .about-index a {
  display: inline-block;
  padding: 8px 13px;
  border: 1px solid var(--orbit);
  border-radius: 999px;
  background: rgba(18, 39, 78, .55);
  color: var(--mist);
  font-size: 12.5px;
  line-height: 1;
  text-decoration: none;
  transition: border-color 200ms var(--ease), color 200ms var(--ease), transform 200ms var(--ease);
}

.page-about .about-index a:hover,
.page-about .about-index a:focus-visible {
  border-color: var(--progress);
  color: var(--bone);
  transform: translateY(-2px);
}

/* ---------------- 成长轨道 ---------------- */
.page-about .about-track {
  position: relative;
  margin-top: 38px;
}

.page-about .about-track::before {
  content: "";
  position: absolute;
  top: 12px;
  bottom: 34px;
  left: calc(var(--about-node) / 2 - 1px);
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--progress) 0%, var(--moss) 32%, var(--signal) 66%, rgba(28, 53, 96, .12) 100%);
  opacity: .55;
}

.page-about .about-chapter {
  position: relative;
  padding-left: calc(var(--about-node) + var(--about-line-gap));
  margin-bottom: 18px;
}

.page-about .about-chapter__node {
  position: absolute;
  left: 0;
  top: 8px;
  z-index: 1;
  display: grid;
  place-items: center;
  width: var(--about-node);
  height: var(--about-node);
  border-radius: 50%;
  border: 1.5px solid var(--orbit);
  background: var(--space-deep);
  box-shadow: 0 0 0 6px var(--space-deep);
  font-size: 12px;
  letter-spacing: .02em;
  color: var(--sand);
  transition: border-color 240ms var(--ease), color 240ms var(--ease);
}

.page-about .about-chapter--tone-a .about-chapter__node {
  border-color: var(--progress);
  color: var(--progress);
}

.page-about .about-chapter--tone-b .about-chapter__node {
  border-color: var(--moss);
  color: var(--moss);
}

.page-about .about-chapter--tone-c .about-chapter__node {
  border-color: var(--signal);
  color: var(--signal);
}

.page-about .about-chapter--tone-d .about-chapter__node {
  border-color: var(--rock);
  color: var(--sand);
}

.page-about .about-panel {
  padding: 20px 16px 22px;
  transition: transform 240ms var(--ease), border-color 240ms var(--ease);
}

.page-about .about-panel:hover {
  transform: translateY(-2px);
  border-color: var(--progress);
}

.page-about .about-chapter h2 {
  margin: 8px 0 12px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(21px, 5vw, 34px);
  line-height: 1.26;
  letter-spacing: -.01em;
  color: var(--bone);
}

.page-about .prose p {
  margin: 0 0 14px;
  font-size: 15.5px;
  line-height: 1.9;
  color: var(--mist);
}

.page-about .prose p:last-child {
  margin-bottom: 0;
}

/* ---------------- 三段成长 ---------------- */
.page-about .phases {
  display: grid;
  gap: 12px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .phase {
  padding: 16px 16px 18px;
  border: 1px solid var(--orbit);
  border-left-width: 3px;
  border-radius: var(--radius-sm);
  background: linear-gradient(158deg, rgba(18, 39, 78, .92), rgba(11, 27, 58, .78));
}

.page-about .phase--start { border-left-color: var(--rock); }
.page-about .phase--grow { border-left-color: var(--moss); }
.page-about .phase--scale { border-left-color: var(--clay); }

.page-about .phase__tag {
  display: inline-block;
  margin-bottom: 9px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--rock);
}

.page-about .phase--grow .phase__tag { color: var(--moss); }
.page-about .phase--scale .phase__tag { color: var(--signal); }

.page-about .phase h3 {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 700;
  color: var(--bone);
}

.page-about .phase p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--mist);
}

/* ---------------- 三条产品线 ---------------- */
.page-about .lines {
  display: grid;
  gap: 12px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .line-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 16px;
  border: 1px solid var(--orbit);
  border-radius: var(--radius-sm);
  background: rgba(18, 39, 78, .6);
  transition: transform 240ms var(--ease), border-color 240ms var(--ease);
}

.page-about .line-card:hover {
  transform: translateY(-2px);
  border-color: var(--progress);
}

.page-about .line-card__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.page-about .line-card__name {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 17px;
  color: var(--bone);
}

.page-about .line-card__for {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .04em;
  color: var(--progress);
}

.page-about .line-card__list {
  display: grid;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .line-card__list li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .line-card__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--moss);
}

.page-about .about-lines-figure,
.page-about .about-team-figure {
  margin: 20px 0 0;
}

.page-about .about-inline-link {
  margin-top: 18px;
}

/* ---------------- 服务覆盖 ---------------- */
.page-about .coverage {
  display: grid;
  gap: 22px;
  margin-top: 20px;
}

.page-about .coverage__ring {
  position: relative;
  width: min(216px, 100%);
  margin: 0 auto;
}

.page-about .coverage__ring svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .coverage__center {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  margin: 0;
  pointer-events: none;
}

.page-about .coverage__center .num {
  font-size: 30px;
  line-height: 1;
}

.page-about .coverage__center .num em {
  font-style: normal;
  color: var(--signal);
}

.page-about .coverage__center-label {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .08em;
  color: var(--rock);
}

.page-about .coverage__legend {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .coverage__legend li {
  display: grid;
  grid-template-columns: 12px minmax(0, 1fr);
  gap: 10px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .coverage__legend b {
  color: var(--bone);
  font-weight: 700;
}

.page-about .coverage__dot {
  margin-top: 9px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--progress);
}

.page-about .coverage__legend li:nth-child(2) .coverage__dot { background: var(--signal); }
.page-about .coverage__legend li:nth-child(3) .coverage__dot { background: var(--moss); }

/* ---------------- 团队与节奏 ---------------- */
.page-about .team-grid {
  display: grid;
  gap: 12px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .team-card {
  padding: 16px;
  border: 1px solid var(--orbit);
  border-radius: var(--radius-sm);
  background: rgba(11, 27, 58, .7);
}

.page-about .team-card__name {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-size: 16px;
  font-weight: 700;
  color: var(--bone);
}

.page-about .team-card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .rhythm {
  display: grid;
  gap: 10px;
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .rhythm li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 13px 14px;
  border: 1px solid var(--orbit);
  border-radius: var(--radius-sm);
  background: rgba(18, 39, 78, .5);
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .rhythm .num {
  flex: none;
  min-width: 60px;
  font-size: 22px;
  line-height: 1;
}

/* ---------------- 合作生态 ---------------- */
.page-about .eco {
  display: grid;
  gap: 10px;
  margin: 20px 0 0;
}

.page-about .eco__item {
  border: 1px solid var(--orbit);
  border-radius: var(--radius-sm);
  background: rgba(18, 39, 78, .5);
  transition: border-color 240ms var(--ease);
}

.page-about .eco__item:hover {
  border-color: var(--progress);
}

.page-about .eco__item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-head);
  font-size: 15.5px;
  font-weight: 700;
  color: var(--bone);
}

.page-about .eco__item summary::-webkit-details-marker {
  display: none;
}

.page-about .eco__item summary::after {
  content: "+";
  flex: none;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--progress);
}

.page-about .eco__item[open] summary::after {
  content: "–";
}

.page-about .eco__body {
  padding: 0 16px 16px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--mist);
}

/* ---------------- 下一步与收口 ---------------- */
.page-about .next-list {
  display: grid;
  gap: 12px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .next-list li {
  padding: 14px 16px;
  border: 1px solid var(--orbit);
  border-radius: var(--radius-sm);
  background: rgba(11, 27, 58, .6);
}

.page-about .next-list__tag {
  display: inline-block;
  margin-bottom: 8px;
  padding: 3px 9px;
  border: 1px solid var(--orbit);
  border-radius: 999px;
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--progress);
}

.page-about .next-list p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-cta {
  display: grid;
  gap: 16px;
  margin-top: 22px;
  padding: 22px 18px;
  border: 1px solid var(--orbit);
  border-radius: var(--radius);
  background:
    radial-gradient(100% 130% at 0% 0%, rgba(255, 107, 53, .16), transparent 60%),
    radial-gradient(90% 120% at 100% 100%, rgba(62, 193, 211, .14), transparent 62%),
    var(--space-2);
}

.page-about .about-cta p {
  max-width: 62ch;
  margin: 0;
  font-size: 15px;
  line-height: 1.9;
  color: var(--mist);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-cta__actions .btn {
  flex: 0 1 auto;
  text-align: center;
}

/* ---------------- 中等屏 ---------------- */
@media (min-width: 720px) {
  .page-about .about-hero {
    padding: 40px 32px 32px;
  }

  .page-about .about-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .phases,
  .page-about .lines,
  .page-about .team-grid,
  .page-about .rhythm {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-about .about-track {
    margin-top: 50px;
  }

  .page-about .about-chapter {
    padding-left: calc(var(--about-node) + 26px);
    margin-bottom: 22px;
  }

  .page-about .about-panel {
    padding: 26px 26px 28px;
  }
}

/* ---------------- 宽屏 ---------------- */
@media (min-width: 1024px) {
  .page-about {
    --about-node: 38px;
    --about-line-gap: 30px;
  }

  .page-about .about-hero {
    padding: 54px 46px 42px;
  }

  .page-about .coverage {
    grid-template-columns: 236px minmax(0, 1fr);
    align-items: center;
    gap: 34px;
  }

  .page-about .about-chapter:nth-child(even) .about-panel {
    margin-left: 28px;
  }

  .page-about .about-chapter:nth-child(odd) .about-panel {
    margin-right: 28px;
  }

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    padding: 26px 28px;
  }

  .page-about .about-cta__actions {
    justify-content: flex-end;
  }
}