.page-about {
  --about-rail-w: 300px;
  --about-body-text: #C9D0E0;
  --about-soft-line: rgba(174, 183, 204, 0.14);
  padding-bottom: clamp(40px, 7vw, 80px);
}

.page-about .breadcrumbs {
  padding-block: 16px 4px;
}

.page-about .breadcrumbs ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--slate);
}

.page-about .breadcrumbs li + li::before {
  content: "/";
  margin-right: 8px;
  color: rgba(174, 183, 204, 0.5);
}

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

.page-about .breadcrumbs a:hover,
.page-about .breadcrumbs a:focus-visible {
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 页头 ---------- */
.page-about .about-head {
  padding-block: clamp(20px, 4vw, 40px) clamp(24px, 4vw, 44px);
}

.page-about .about-head__inner {
  border-top: 1px solid var(--line-soft);
  padding-top: clamp(20px, 3vw, 32px);
}

.page-about .eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--orange);
  margin: 0 0 12px;
}

.page-about h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(28px, 7.2vw, 52px);
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--paper);
  text-shadow: 1px 1px 0 rgba(123, 77, 255, 0.55), 2px 2px 0 rgba(34, 211, 238, 0.22);
}

.page-about .about-lede {
  margin: 18px 0 0;
  max-width: 62ch;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.85;
  color: var(--about-body-text);
}

.page-about .about-facts {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

.page-about .about-facts li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 16px;
  border: 1px solid var(--line-soft);
  border-left: 2px solid var(--violet);
  border-radius: var(--radius-md);
  background: rgba(27, 23, 48, 0.55);
}

.page-about .about-facts li:nth-child(2) { border-left-color: var(--cyan); }
.page-about .about-facts li:nth-child(3) { border-left-color: var(--orange); }

.page-about .about-fact-num {
  font-family: var(--font-mono);
  font-size: clamp(24px, 4vw, 30px);
  line-height: 1;
  color: var(--paper);
}

.page-about .about-fact-txt {
  font-size: 13px;
  line-height: 1.6;
  color: var(--slate);
}

/* ---------- 双栏骨架 ---------- */
.page-about .about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 48px);
  align-items: start;
}

.page-about .about-flow { min-width: 0; }

.page-about .about-section {
  padding-block: clamp(26px, 4.5vw, 44px);
  border-top: 1px solid var(--line-soft);
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-about .about-section:first-child { border-top: 0; }

.page-about .sec-index {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-about .sec-title {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-size: clamp(21px, 4.2vw, 30px);
  line-height: 1.3;
  color: var(--paper);
  text-shadow: 1px 1px 0 rgba(123, 77, 255, 0.4);
}

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

.page-about .about-section p {
  margin: 0 0 14px;
  font-size: clamp(15px, 1.6vw, 16.5px);
  line-height: 1.85;
  color: var(--about-body-text);
}

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

.page-about .about-section a {
  color: var(--cyan);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.page-about .about-section a:hover,
.page-about .about-section a:focus-visible {
  color: var(--orange);
}

.page-about .about-aside {
  margin-top: 18px !important;
  padding: 14px 18px;
  border-left: 3px solid var(--cyan);
  background: rgba(34, 211, 238, 0.07);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-weight: 600;
  color: var(--paper) !important;
}

.page-about .about-note {
  margin-top: 16px !important;
  font-family: var(--font-mono);
  font-size: 12.5px !important;
  line-height: 1.7 !important;
  color: var(--slate) !important;
  letter-spacing: 0.02em;
}

/* ---------- 图片容器 ---------- */
.page-about img {
  display: block;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-figure {
  margin: 0 0 22px;
}

.page-about .about-figure img {
  width: 100%;
  aspect-ratio: 10 / 7;
}

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

/* ---------- 时间轴 ---------- */
.page-about .timeline {
  position: relative;
  display: grid;
  gap: 8px;
  margin-top: 4px;
  padding-left: 20px;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--violet), var(--cyan) 55%, var(--orange));
  opacity: 0.55;
}

.page-about .tl-item {
  position: relative;
  border-radius: var(--radius-md);
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: -20px;
  top: 20px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--cyan);
  box-shadow: 0 0 0 3px rgba(11, 13, 20, 0.9);
}

.page-about .tl-item[open]::before,
.page-about .tl-item:hover::before {
  background: var(--lime);
  border-color: var(--lime);
}

.page-about .tl-item > summary {
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-wrap: wrap;
  padding: 12px 14px;
  cursor: pointer;
  list-style: none;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-md);
  background: rgba(27, 23, 48, 0.5);
  transition: transform 180ms ease, border-color 180ms ease, background-color 180ms ease;
}

.page-about .tl-item > summary::-webkit-details-marker { display: none; }
.page-about .tl-item > summary::marker { content: ""; }

.page-about .tl-item > summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 16px;
  line-height: 1;
  color: var(--cyan);
}

.page-about .tl-item[open] > summary::after { content: "−"; }

.page-about .tl-item > summary:hover {
  transform: translateY(-2px);
  border-color: rgba(34, 211, 238, 0.45);
}

.page-about .tl-item > summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-about .tl-item[open] > summary {
  border-color: rgba(123, 77, 255, 0.6);
  background: rgba(27, 23, 48, 0.92);
}

.page-about .tl-ver {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--orange);
  border: 1px solid rgba(255, 138, 61, 0.45);
  border-radius: var(--radius-pill);
  padding: 2px 8px;
}

.page-about .tl-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .tl-body {
  padding: 12px 16px 14px;
  border-left: 1px solid var(--line-soft);
  margin-left: 2px;
}

.page-about .tl-body p {
  margin: 0;
  font-size: 14.5px !important;
  line-height: 1.8 !important;
  color: #B9C2D4 !important;
}

/* ---------- 团队 ---------- */
.page-about .team-panels {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-top: 6px;
}

.page-about .team-card {
  padding: 18px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-lg);
  background: var(--panel-deep);
  box-shadow: var(--shadow-panel);
  transition: transform 200ms ease, border-color 200ms ease;
}

.page-about .team-card:hover {
  transform: translateY(-3px);
  border-color: rgba(123, 77, 255, 0.55);
}

.page-about .team-card:nth-child(1) { border-top: 2px solid var(--violet); }
.page-about .team-card:nth-child(2) { border-top: 2px solid var(--cyan); }
.page-about .team-card:nth-child(3) { border-top: 2px solid var(--orange); }

.page-about .team-card p {
  margin: 0;
  font-size: 14.5px !important;
  line-height: 1.78 !important;
}

.page-about .team-bridge {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
  margin-top: 20px;
  padding: 18px;
  border: 1px solid rgba(163, 255, 94, 0.22);
  border-radius: var(--radius-lg);
  background: linear-gradient(160deg, rgba(13, 59, 69, 0.65), rgba(27, 23, 48, 0.65));
}

.page-about .team-bridge__text { min-width: 0; }

.page-about .team-bridge p {
  margin: 0;
  font-size: 14.5px !important;
  line-height: 1.8 !important;
}

.page-about .team-figure { margin: 0; }

.page-about .team-figure img { aspect-ratio: 3 / 2; }

/* ---------- 数字 ---------- */
.page-about .stat-row {
  list-style: none;
  margin: 20px 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-about .stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 16px 18px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-md);
  background: rgba(27, 23, 48, 0.6);
  cursor: default;
  transition: border-color 180ms ease, background-color 180ms ease;
}

.page-about .stat:hover,
.page-about .stat:focus-visible {
  border-color: rgba(34, 211, 238, 0.5);
  background: rgba(27, 23, 48, 0.92);
  outline: none;
}

.page-about .stat:focus-visible {
  box-shadow: 0 0 0 2px var(--cyan);
}

.page-about .stat-num {
  font-family: var(--font-mono);
  font-size: clamp(30px, 6vw, 42px);
  line-height: 1;
  color: var(--cyan);
  letter-spacing: -0.02em;
}

.page-about .stat-unit {
  font-size: 0.5em;
  margin-left: 2px;
  color: var(--paper);
}

.page-about .stat-label {
  font-size: 13px;
  color: var(--slate);
  letter-spacing: 0.04em;
}

.page-about .stat-note {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  font-size: 13px;
  line-height: 1.7;
  color: #B9C2D4;
  transition: max-height 220ms ease, opacity 200ms ease, margin-top 200ms ease;
}

.page-about .stat:hover .stat-note,
.page-about .stat:focus-visible .stat-note,
.page-about .stat:focus-within .stat-note {
  max-height: 120px;
  opacity: 1;
  margin-top: 8px;
}

/* ---------- 四步流程 ---------- */
.page-about .flow-steps {
  list-style: none;
  margin: 18px 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  counter-reset: step;
}

.page-about .flow-steps li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 16px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-md);
  background: rgba(18, 15, 36, 0.8);
}

.page-about .step-idx {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--orange);
}

.page-about .flow-steps strong {
  font-size: 15px;
  color: var(--paper);
}

.page-about .flow-steps li > span:last-child {
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--about-body-text);
}

/* ---------- 荣誉卡 ---------- */
.page-about .honor-wrap {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin-top: 20px;
}

.page-about .honor-card {
  position: relative;
  min-height: 260px;
  perspective: 1000px;
  outline: none;
  border-radius: var(--radius-lg);
}

.page-about .honor-card:focus-visible {
  box-shadow: 0 0 0 2px var(--cyan);
}

.page-about .honor-inner {
  position: absolute;
  inset: 0;
  transform-style: preserve-3d;
  transition: transform 560ms cubic-bezier(0.3, 0.7, 0.3, 1);
}

.page-about .honor-face {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 10px;
  padding: 20px;
  border-radius: var(--radius-lg);
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
}

.page-about .honor-front {
  background: var(--paper);
  color: #17142A;
  border: 1px solid rgba(23, 20, 42, 0.16);
  box-shadow: 0 20px 44px -32px rgba(0, 0, 0, 0.95);
}

.page-about .honor-back {
  transform: rotateY(180deg);
  background: var(--teal-deep);
  border: 1px solid rgba(34, 211, 238, 0.35);
  color: var(--paper);
}

.page-about .honor-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: #6A3BD6;
}

.page-about .honor-tag--back { color: var(--cyan); }

.page-about .honor-name {
  font-family: var(--font-display);
  font-size: clamp(18px, 3.4vw, 22px);
  line-height: 1.35;
  color: #17142A;
}

.page-about .honor-sub {
  font-size: 12.5px;
  line-height: 1.6;
  color: rgba(23, 20, 42, 0.7);
}

.page-about .honor-hint {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: rgba(23, 20, 42, 0.55);
  border-top: 1px dashed rgba(23, 20, 42, 0.25);
  padding-top: 10px;
}

.page-about .honor-back ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .honor-back li {
  position: relative;
  padding-left: 16px;
  font-size: 13.5px;
  line-height: 1.72;
  color: #C9D0E0;
}

.page-about .honor-back li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 6px;
  height: 6px;
  background: var(--lime);
  border-radius: 1px;
}

.page-about .honor-side {
  padding: 18px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-lg);
  background: rgba(27, 23, 48, 0.5);
}

.page-about .honor-side p {
  margin: 0;
  font-size: 14px !important;
  line-height: 1.8 !important;
}

/* ---------- 做法清单 ---------- */
.page-about .practice-list {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-about .practice-list li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 12px;
  padding: 14px 0;
  border-bottom: 1px solid var(--about-soft-line);
}

.page-about .practice-list li:first-child { border-top: 1px solid var(--about-soft-line); }

.page-about .p-idx {
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.9;
  color: var(--violet);
}

.page-about .practice-list h3 {
  margin: 0 0 6px;
  font-size: 15px;
  color: var(--paper);
}

.page-about .practice-list p {
  margin: 0;
  font-size: 14px !important;
  line-height: 1.78 !important;
  color: #B9C2D4 !important;
}

/* ---------- 侧栏 ---------- */
.page-about .about-rail {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  min-width: 0;
}

.page-about .rail-card {
  padding: 16px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-lg);
  background: rgba(27, 23, 48, 0.62);
  box-shadow: var(--shadow-panel);
}

.page-about .rail-label {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--orange);
}

.page-about .rail-nav ul,
.page-about .rail-links ul,
.page-about .swatches {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .rail-nav ul {
  display: grid;
  gap: 2px;
}

.page-about .rail-nav a {
  display: block;
  padding: 6px 8px;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--slate);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: color 160ms ease, background-color 160ms ease, border-color 160ms ease;
}

.page-about .rail-nav a:hover,
.page-about .rail-nav a:focus-visible {
  color: var(--paper);
  background: rgba(123, 77, 255, 0.18);
  border-left-color: var(--violet);
  outline: none;
}

.page-about .rail-nav a[aria-current="true"],
.page-about .rail-nav a[aria-current="location"] {
  color: var(--paper);
  border-left-color: var(--cyan);
  background: rgba(34, 211, 238, 0.12);
}

.page-about .swatches {
  display: grid;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: var(--slate);
}

.page-about .swatches li {
  display: flex;
  align-items: center;
  gap: 10px;
}

.page-about .chip {
  width: 20px;
  height: 20px;
  flex: 0 0 20px;
  border-radius: 4px;
  border: 1px solid rgba(244, 232, 208, 0.22);
  box-shadow: 0 0 12px -4px currentColor;
}

.page-about .chip--violet { background: #7B4DFF; color: #7B4DFF; }
.page-about .chip--cyan { background: #22D3EE; color: #22D3EE; }
.page-about .chip--orange { background: #FF8A3D; color: #FF8A3D; }
.page-about .chip--paper { background: #F4E8D0; color: #F4E8D0; }
.page-about .chip--lime { background: #A3FF5E; color: #A3FF5E; }

.page-about .rail-foot {
  margin: 12px 0 0;
  padding-top: 10px;
  border-top: 1px dashed var(--line-soft);
  font-size: 12px;
  line-height: 1.7;
  color: var(--slate);
}

.page-about .rail-note {
  background: linear-gradient(165deg, rgba(13, 59, 69, 0.85), rgba(27, 23, 48, 0.85));
  border-color: rgba(34, 211, 238, 0.25);
}

.page-about .rail-note p {
  margin: 0;
  font-size: 13px;
  line-height: 1.78;
  color: #C9D0E0;
}

.page-about .rail-links ul {
  display: grid;
  gap: 6px;
}

.page-about .rail-links a {
  display: inline-block;
  font-size: 13.5px;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(34, 211, 238, 0.35);
  padding-bottom: 2px;
}

.page-about .rail-links a:hover,
.page-about .rail-links a:focus-visible {
  color: var(--orange);
  border-bottom-color: var(--orange);
}

/* ---------- 页尾声明区 ---------- */
.page-about .about-closing {
  margin-top: clamp(28px, 5vw, 56px);
  padding-block: clamp(28px, 5vw, 52px);
  border-top: 1px solid var(--line-soft);
  background: linear-gradient(155deg, rgba(27, 23, 48, 0.7), rgba(11, 13, 20, 0.2) 60%);
}

.page-about .about-closing__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
  align-items: center;
}

.page-about .closing-figure {
  margin: 0;
  max-width: 360px;
}

.page-about .closing-figure img {
  width: 100%;
  aspect-ratio: 1 / 1;
  border-radius: var(--radius-lg);
}

.page-about .closing-text h2 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: clamp(20px, 4vw, 28px);
  line-height: 1.32;
  color: var(--paper);
}

.page-about .closing-text p {
  margin: 0 0 20px;
  font-size: clamp(14.5px, 1.6vw, 16px);
  line-height: 1.85;
  color: var(--about-body-text);
  max-width: 60ch;
}

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

/* ---------- 断点 ---------- */
@media (min-width: 600px) {
  .page-about .about-facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .stat-row {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .flow-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 780px) {
  .page-about .team-panels {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
  }
  .page-about .team-card:nth-child(2) { margin-top: 26px; }
  .page-about .team-card:nth-child(3) { margin-top: 52px; }

  .page-about .team-bridge {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    align-items: center;
  }

  .page-about .honor-wrap {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    align-items: stretch;
  }

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

  .page-about .about-closing__inner {
    grid-template-columns: minmax(0, 340px) minmax(0, 1fr);
    gap: clamp(24px, 4vw, 48px);
  }
}

@media (min-width: 1024px) {
  .page-about .about-grid {
    grid-template-columns: minmax(0, 1fr) var(--about-rail-w);
    gap: clamp(32px, 4vw, 56px);
  }
  .page-about .about-rail {
    position: sticky;
    top: calc(var(--header-h) + 20px);
    align-self: start;
  }
  .page-about .about-flow {
    max-width: 760px;
  }
}

@media (hover: none) {
  .page-about .honor-card:hover .honor-inner {
    transform: none;
  }
  .page-about .honor-card:focus-within .honor-inner,
  .page-about .honor-card:focus .honor-inner {
    transform: rotateY(180deg);
  }
}

@media (hover: hover) {
  .page-about .honor-card:hover .honor-inner,
  .page-about .honor-card:focus-within .honor-inner,
  .page-about .honor-card:focus .honor-inner {
    transform: rotateY(180deg);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .tl-item > summary,
  .page-about .team-card,
  .page-about .stat,
  .page-about .honor-inner,
  .page-about .stat-note {
    transition: none;
  }
  .page-about .tl-item > summary:hover,
  .page-about .team-card:hover {
    transform: none;
  }
}