/* ===== 品牌档案 / page-about 专属样式 ===== */

.page-about {
  --pa-gap: 20px;
  display: block;
  color: var(--text);
}

/* --- 面包屑与首屏 --- */
.page-about .pa-crumb {
  padding-top: 20px;
  padding-bottom: 4px;
}

.page-about .about-hero {
  padding-top: 14px;
  padding-bottom: 34px;
}

.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(31px, 6.6vw, 62px);
  line-height: 1.03;
  letter-spacing: -0.005em;
  color: var(--paper);
  margin: 12px 0 0;
  max-width: 15em;
}

.page-about .about-hero .lead {
  margin: 16px 0 0;
  max-width: 37em;
  color: var(--text);
}

.page-about .hero-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 26px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .fact {
  background: var(--ink-2);
  padding: 12px 14px 14px;
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.page-about .fact:first-child {
  background: var(--ink-3);
}

.page-about .fact-num {
  font-family: var(--font-mono);
  font-size: 19px;
  line-height: 1.1;
  color: var(--orange);
  letter-spacing: 0.01em;
}

.page-about .fact-label {
  font-size: 12px;
  line-height: 1.5;
  color: var(--muted);
}

/* --- 章节骨架 --- */
.page-about .section {
  padding: 38px 0 42px;
}

.page-about .section-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px 16px;
  align-items: baseline;
  margin: 0 0 24px;
}

.page-about .section-num {
  font-family: var(--font-mono);
  font-size: clamp(28px, 6vw, 44px);
  line-height: 0.9;
  letter-spacing: -0.02em;
  color: var(--orange);
}

.page-about .section-title {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(20px, 3.4vw, 28px);
  line-height: 1.28;
  color: var(--paper);
  margin: 0;
}

.page-about .section-sub {
  margin: 7px 0 0;
  font-size: 13px;
  line-height: 1.65;
  color: var(--muted);
}

.page-about .prose p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.72;
}

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

/* --- 01 品牌由来 --- */
.page-about .pa-origin {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
}

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

.page-about .media-caption {
  font-size: 12px;
  line-height: 1.6;
  color: var(--muted);
}

/* --- 02 定义式术语对照 --- */
.page-about .pa-defs {
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-about .pa-def {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
  border-left: 1px solid transparent;
  transition: background-color 0.18s ease, border-left-color 0.18s ease;
}

.page-about .pa-def dt {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--paper);
  transition: color 0.18s ease;
}

.page-about .pa-def dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--text);
  max-width: 44em;
}

/* --- 03 时间轴 --- */
.page-about .pa-timeline {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .pa-node {
  position: relative;
  background: var(--ink-2);
  padding: 20px 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 7px;
  transition: background-color 0.18s ease;
}

.page-about .pa-node::before {
  content: "";
  display: block;
  height: 6px;
  margin: -20px -16px 12px;
  background: var(--line-strong);
}

.page-about .pa-node:nth-child(1)::before {
  background: var(--ink-3);
}

.page-about .pa-node:nth-child(2)::before {
  background: var(--indigo);
}

.page-about .pa-node:nth-child(3)::before {
  background: var(--wine);
}

.page-about .pa-node:nth-child(4)::before {
  background: var(--orange);
}

.page-about .pa-node-year {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

.page-about .pa-node-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  line-height: 1.35;
  color: var(--paper);
  margin: 0;
}

.page-about .pa-node-body {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--text);
}

.page-about .pa-node-point {
  margin: 0;
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--muted);
  border-left: 1px solid var(--line-strong);
  padding-left: 10px;
}

/* --- 04 团队分组 --- */
.page-about .pa-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}

.page-about .pa-team-card {
  background: var(--ink-2);
  border: 1px solid var(--line);
  padding: 18px 18px 20px;
  transition: border-color 0.18s ease, background-color 0.18s ease;
}

.page-about .pa-team-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 30px;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--cyan);
  margin-bottom: 12px;
}

.page-about .pa-team-card h3 {
  font-family: var(--font-serif);
  font-size: 17px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--paper);
  margin: 0 0 8px;
}

.page-about .pa-team-card p {
  margin: 0 0 12px;
  font-size: 13.5px;
  line-height: 1.68;
  color: var(--text);
}

.page-about .pa-team-list {
  list-style: none;
  margin: 0;
  padding: 12px 0 0;
  border-top: 1px solid var(--line);
  display: grid;
  gap: 7px;
}

.page-about .pa-team-list li {
  position: relative;
  padding-left: 16px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}

.page-about .pa-team-list li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--orange);
}

/* --- 05 校对闭环 --- */
.page-about .pa-loop {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .pa-loop li {
  background: var(--ink-2);
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 16px;
  padding: 16px 18px;
  transition: background-color 0.18s ease;
}

.page-about .pa-loop-num {
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: var(--orange);
}

.page-about .pa-loop h3 {
  font-size: 15px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--paper);
  margin: 0 0 4px;
  font-family: var(--font-body);
}

.page-about .pa-loop p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--text);
  max-width: 48em;
}

/* --- 06 覆盖范围 --- */
.page-about .pa-cover {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
}

.page-about .pa-cover-body .prose {
  margin-bottom: 20px;
}

.page-about .pa-cover-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .pa-stat {
  background: var(--ink-2);
  padding: 14px 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .pa-stat-num {
  font-family: var(--font-mono);
  font-size: 21px;
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--cyan);
}

.page-about .pa-stat-label {
  font-size: 12px;
  line-height: 1.5;
  color: var(--muted);
}

/* --- 收束区 --- */
.page-about .pa-next {
  padding-top: 30px;
  padding-bottom: 40px;
}

.page-about .pa-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

/* --- 微交互：悬停与聚焦 --- */
.page-about .pa-def:hover,
.page-about .pa-def:focus-within {
  background: var(--ink-2);
  border-left-color: var(--cyan);
  padding-left: 16px;
  padding-right: 16px;
}

.page-about .pa-def:hover dt,
.page-about .pa-def:focus-within dt {
  color: var(--cyan);
}

.page-about .pa-def:focus-visible,
.page-about .pa-node:focus-visible {
  outline: 1px solid var(--cyan);
  outline-offset: 2px;
}

.page-about .pa-node:hover {
  background: var(--ink-3);
}

.page-about .pa-team-card:hover {
  border-color: var(--orange);
  background: var(--ink-3);
}

.page-about .pa-loop li:hover {
  background: var(--ink-3);
}

/* --- 断点：平板 --- */
@media (min-width: 640px) {
  .page-about .hero-facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-about .pa-loop li {
    padding: 18px 22px;
  }
}

/* --- 断点：桌面 --- */
@media (min-width: 860px) {
  .page-about .hero-facts {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .page-about .pa-origin {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 32px;
    align-items: start;
  }

  .page-about .pa-cover {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
    gap: 32px;
    align-items: start;
  }

  .page-about .pa-team {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

  .page-about .pa-def {
    grid-template-columns: 180px minmax(0, 1fr);
    gap: 26px;
    align-items: start;
    padding: 20px 0;
  }
}

@media (min-width: 960px) {
  .page-about .section {
    padding: 46px 0 52px;
  }

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

/* --- 桌面端时间轴：悬停展开要点 --- */
@media (min-width: 960px) and (hover: hover) {
  .page-about .pa-node-point {
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    margin-top: 0;
    padding-left: 10px;
    border-left-color: transparent;
    transition: max-height 0.24s ease, opacity 0.24s ease, margin-top 0.24s ease,
      border-left-color 0.24s ease;
  }

  .page-about .pa-node:hover .pa-node-point,
  .page-about .pa-node:focus-within .pa-node-point {
    max-height: 8em;
    opacity: 1;
    margin-top: 4px;
    border-left-color: var(--cyan);
  }
}
<<<END>>>