/* ============ 品牌故事页 page-about ============ */

.page-about {
  --about-pad: clamp(44px, 7vw, 92px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(22px, 4vw, 48px) 0 clamp(44px, 6.5vw, 88px);
  overflow: hidden;
}
.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--line), transparent);
}
.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(30px, 4.5vw, 56px);
  align-items: center;
}
.page-about .about-hero__copy .eyebrow {
  margin: 0 0 14px;
}
.page-about .about-hero__copy h1 {
  margin: 0 0 18px;
  font-size: clamp(28px, 3.6vw, 50px);
  line-height: 1.24;
  letter-spacing: -0.01em;
  color: var(--bone);
}
.page-about .about-hero__copy .lead {
  max-width: 44ch;
  color: var(--ink-3);
  margin: 0;
}
.page-about .about-hero__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

/* 首屏纯 CSS 通道示意 */
.page-about .about-hero__viz {
  position: relative;
  min-height: clamp(210px, 32vw, 320px);
  border-radius: var(--radius);
  border: 1px solid var(--line-soft);
  background:
    radial-gradient(120% 90% at 100% 0%, rgba(67, 245, 220, 0.07), transparent 62%),
    linear-gradient(180deg, var(--glass), rgba(120, 150, 200, 0.02));
  overflow: hidden;
}
.page-about .viz-axis {
  position: absolute;
  left: 10%;
  top: 16%;
  bottom: 16%;
  width: 1px;
  background: linear-gradient(180deg, transparent, var(--line), transparent);
}
.page-about .viz-line {
  position: absolute;
  left: 10%;
  height: 2px;
  border-radius: 2px;
}
.page-about .viz-line--latest {
  top: 35%;
  width: 72%;
  background: linear-gradient(90deg, rgba(255, 154, 60, 0.12), var(--amber));
}
.page-about .viz-line--apple {
  top: 63%;
  width: 72%;
  background: linear-gradient(90deg, rgba(201, 211, 224, 0.1), var(--silver-a));
}
.page-about .viz-node {
  position: absolute;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  transform: translate(-50%, -50%);
  animation: about-node 9s ease-in-out infinite;
}
.page-about .viz-node--latest {
  left: 82%;
  top: 35%;
  background: var(--amber);
  box-shadow: 0 0 0 6px rgba(255, 154, 60, 0.14);
}
.page-about .viz-node--apple {
  left: 82%;
  top: 63%;
  background: var(--silver-a);
  box-shadow: 0 0 0 6px rgba(201, 211, 224, 0.12);
  animation-delay: 1.6s;
}
.page-about .viz-tag {
  position: absolute;
  left: 12%;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ink-2);
}
.page-about .viz-tag--latest {
  top: calc(35% + 18px);
  color: var(--amber);
}
.page-about .viz-tag--apple {
  top: calc(63% + 18px);
  color: var(--silver-a);
}

@keyframes about-node {
  0%, 100% { opacity: 0.7; }
  50% { opacity: 1; }
}

/* ---------- 三栏骨架 ---------- */
.page-about .about-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(30px, 3.4vw, 44px);
  padding-top: var(--about-pad);
  padding-bottom: var(--about-pad);
  align-items: start;
}

/* ---------- 章节 ---------- */
.page-about .about-block {
  position: relative;
  padding-bottom: clamp(34px, 4.4vw, 60px);
  border-bottom: 1px solid var(--line-soft);
  margin-bottom: clamp(34px, 4.4vw, 60px);
}
.page-about .about-block:last-child {
  border-bottom: 0;
  margin-bottom: 0;
  padding-bottom: 0;
}
.page-about .about-head {
  display: grid;
  gap: 8px;
  margin-bottom: 20px;
}
.page-about .about-num {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--cyan);
}
.page-about .about-block h2 {
  margin: 0;
  font-size: clamp(22px, 2.5vw, 33px);
  line-height: 1.3;
  color: var(--bone);
  letter-spacing: -0.005em;
}
.page-about .prose-stand {
  margin: 0 0 22px;
  max-width: 58ch;
  color: var(--ink-3);
  line-height: 1.75;
}

/* ---------- 三个小组 ---------- */
.page-about .teams {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin: 22px 0 26px;
}
.page-about .team {
  position: relative;
  padding: 22px 18px 24px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line-soft);
  background: linear-gradient(180deg, rgba(108, 120, 137, 0.1), rgba(20, 30, 56, 0.55));
  transition: border-color 0.3s ease, background 0.3s ease, transform 0.3s ease;
}
.page-about .team::before {
  content: "";
  position: absolute;
  left: 18px;
  right: 18px;
  top: 0;
  height: 2px;
  border-radius: 2px;
  background: var(--moss);
  opacity: 0.32;
  transition: opacity 0.3s ease;
}
.page-about .team:hover,
.page-about .team:focus-visible {
  border-color: rgba(111, 191, 139, 0.42);
  background: linear-gradient(180deg, rgba(111, 191, 139, 0.1), rgba(20, 30, 56, 0.66));
  transform: translateY(-3px);
  outline: none;
}
.page-about .team:hover::before,
.page-about .team:focus-visible::before {
  opacity: 1;
}
.page-about .team__id {
  margin: 0 0 10px;
  font-family: var(--mono);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--moss);
}
.page-about .team__name {
  margin: 0 0 10px;
  font-size: 17px;
  line-height: 1.4;
  color: var(--bone);
}
.page-about .team__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--ink-2);
}

/* ---------- 图片容器 ---------- */
.page-about .about-figure {
  margin: 0;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line-soft);
  background: var(--slate);
}
.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}
.page-about .about-figure .media__caption {
  padding: 10px 14px 12px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--rock);
  background: var(--panel);
}

/* ---------- 复核节奏双栏 ---------- */
.page-about .cycle {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3vw, 32px);
  align-items: center;
}
.page-about .cycle__fig {
  margin: 0;
  max-width: 300px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid var(--line-soft);
}
.page-about .cycle__fig img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .cycle__fig .media__caption {
  padding: 9px 12px 11px;
  font-size: 12px;
  line-height: 1.55;
  color: var(--rock);
  background: var(--panel);
}

/* ---------- 版本演进带 ---------- */
.page-about .vband {
  list-style: none;
  margin: 24px 0 28px;
  padding: 0;
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(158px, 1fr);
  overflow-x: auto;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}
.page-about .vband__stage {
  position: relative;
  padding: 26px 18px 0 0;
  border-top: 1px solid var(--line);
  outline: none;
}
.page-about .vband__stage--now {
  border-top-color: rgba(255, 154, 60, 0.55);
}
.page-about .vband__dot {
  position: absolute;
  top: -5px;
  left: 0;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--rock);
  box-shadow: 0 0 0 4px var(--void);
}
.page-about .vband__stage--now .vband__dot {
  background: var(--amber);
  box-shadow: 0 0 0 4px var(--void), 0 0 0 8px rgba(255, 154, 60, 0.16);
}
.page-about .vband__name {
  display: block;
  margin-bottom: 8px;
  font-family: var(--mono);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--ink-3);
}
.page-about .vband__stage--now .vband__name {
  color: var(--amber);
}
.page-about .vband__pop {
  display: block;
  max-width: 22ch;
  font-size: 13.5px;
  line-height: 1.68;
  color: var(--ink-2);
  opacity: 0.76;
  transition: opacity 0.28s ease, color 0.28s ease;
}
.page-about .vband__stage:hover .vband__pop,
.page-about .vband__stage:focus-visible .vband__pop {
  opacity: 1;
  color: var(--bone);
}

/* ---------- 数据条 ---------- */
.page-about .about-strip {
  margin-top: 26px;
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}

/* ---------- 求助出口 ---------- */
.page-about .about-reach {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

/* ---------- 右侧旁注 ---------- */
.page-about .about-body__side {
  display: grid;
  gap: 16px;
}
.page-about .about-note {
  padding: 18px 18px 20px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line-soft);
}
.page-about .about-note__tag {
  margin: 0 0 10px;
  font-family: var(--mono);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--violet);
}
.page-about .about-note p:last-child {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-2);
}

/* ---------- 媒体查询 ---------- */
@media (min-width: 620px) {
  .page-about .teams {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 720px) {
  .page-about .cycle {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  }
  .page-about .cycle__fig {
    justify-self: end;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 6.4fr) minmax(0, 5.6fr);
  }
}

@media (min-width: 1000px) {
  .page-about .about-body {
    grid-template-columns: minmax(0, 3fr) minmax(0, 6fr) minmax(0, 3fr);
  }
  .page-about .about-rail,
  .page-about .about-body__side {
    position: sticky;
    top: calc(var(--header-h-sm) + 24px);
    align-self: start;
  }
}

@media (max-width: 999px) {
  .page-about .about-body__side {
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  }
  .page-about .about-rail {
    padding-bottom: 8px;
    border-bottom: 1px solid var(--line-soft);
  }
}

@media (max-width: 560px) {
  .page-about .about-hero__acts .btn,
  .page-about .about-reach .btn {
    width: 100%;
    text-align: center;
  }
  .page-about .vband {
    grid-auto-columns: minmax(150px, 1fr);
  }
  .page-about .cycle__fig {
    max-width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .viz-node {
    animation: none;
  }
  .page-about .team,
  .page-about .vband__pop {
    transition: none;
  }
  .page-about .team:hover,
  .page-about .team:focus-visible {
    transform: none;
  }
}
<<<END>>>