/* ===== 校订文化页 · 页面专属样式（作用域 .page-about） ===== */

.page-about {
  --about-rail-w: 190px;
  --about-rule-gap: clamp(28px, 5vw, 56px);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(44px, 8vw, 88px) clamp(32px, 5vw, 56px);
  border-bottom: 2px solid var(--line-2);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 64px 64px;
  opacity: 0.36;
  -webkit-mask-image: linear-gradient(to bottom, #000 0%, transparent 88%);
  mask-image: linear-gradient(to bottom, #000 0%, transparent 88%);
}

.page-about .about-hero__shell {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 5vw, 52px);
  align-items: end;
}

@media (min-width: 1000px) {
  .page-about .about-hero__shell {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  }
}

.page-about .about-hero h1 {
  margin: 14px 0 0;
  font-family: var(--font-serif);
  font-size: clamp(30px, 5.2vw, 56px);
  font-weight: 600;
  line-height: 1.18;
  letter-spacing: 0.01em;
  color: var(--paper);
}

.page-about .about-hero .breadcrumb {
  margin-bottom: 4px;
}

.page-about .about-hero__lead {
  max-width: 46ch;
  margin-top: 20px;
  font-size: 16px;
  line-height: 1.72;
  color: var(--muted);
}

.page-about .about-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  margin-top: 26px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.page-about .about-hero__fact {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.page-about .about-hero__fact b {
  margin-right: 6px;
  font-weight: 600;
  color: var(--cyan);
}

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

/* ---------- 主体骨架 ---------- */

.page-about .about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--about-rule-gap);
  padding-block: clamp(32px, 6vw, 72px) clamp(56px, 9vw, 128px);
}

@media (min-width: 1040px) {
  .page-about .about-layout {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    column-gap: clamp(28px, 4vw, 56px);
  }
}

/* ---------- 左侧轨道 / 章节目录 ---------- */

.page-about .about-rail {
  align-self: start;
}

@media (min-width: 1040px) {
  .page-about .about-rail {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }
}

.page-about .about-rail .section-nav__title {
  margin: 0;
}

.page-about .about-rail__list {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 6px;
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
}

@media (min-width: 1040px) {
  .page-about .about-rail__list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 0;
  }
}

.page-about .about-rail__list a {
  display: block;
  padding: 8px 10px;
  border-bottom: 2px solid transparent;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--muted);
  text-decoration: none;
  transition: color 120ms linear, border-color 120ms linear;
}

@media (min-width: 1040px) {
  .page-about .about-rail__list a {
    padding: 9px 10px 9px 0;
    border-bottom: 1px solid var(--line);
    border-left: 2px solid transparent;
    padding-left: 12px;
  }
}

.page-about .about-rail__list a:hover {
  color: var(--paper);
  border-color: var(--cyan-dim);
}

.page-about .about-rail__list a[data-active] {
  color: var(--cyan);
  border-color: var(--cyan);
}

/* ---------- 章节通用 ---------- */

.page-about .about-main .section {
  padding-block: clamp(32px, 5vw, 60px);
}

.page-about .about-main .section + .section {
  border-top: 1px solid var(--line);
}

.page-about .section-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 6px 18px;
  align-items: start;
}

.page-about .section-head__index {
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--cyan);
}

.page-about .section-head__text .section-title {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 600;
  line-height: 1.24;
  color: var(--paper);
}

.page-about .about-main .prose {
  margin-top: 16px;
}

.page-about .about-main .prose p {
  margin: 0 0 14px;
  font-size: 15.5px;
  line-height: 1.72;
  color: var(--paper);
}

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

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

.page-about .about-main .prose a:hover {
  text-decoration-color: var(--cyan);
}

.page-about .about-kicker {
  padding: 13px 16px;
  border-left: 3px solid var(--cyan);
  background: var(--grid);
  color: var(--paper);
  font-size: 14.5px;
}

/* ---------- 三条内容线 ---------- */

.page-about .about-lines {
  display: grid;
  gap: 12px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-lines__item {
  padding: 16px 18px;
  border-left: 2px solid var(--cyan-dim);
  background: var(--grid);
}

.page-about .about-lines__step {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-about .about-lines__item h3 {
  margin: 7px 0 0;
  font-family: var(--font-body);
  font-size: 17px;
  font-weight: 600;
  color: var(--paper);
}

.page-about .about-lines__item p {
  margin: 8px 0 0;
  font-size: 14.8px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 编号原则列表 ---------- */

.page-about .about-principles {
  display: grid;
  gap: 1px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-principles__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 16px;
  align-items: start;
  padding: 16px 16px 18px;
  background: var(--ink);
  transition: background-color 120ms linear;
}

.page-about .about-principles__item:hover {
  background: var(--grid);
}

.page-about .about-principles__num {
  font-family: var(--font-display);
  font-size: clamp(26px, 3.4vw, 38px);
  font-weight: 600;
  line-height: 0.92;
  letter-spacing: -0.02em;
  color: var(--cyan);
}

.page-about .about-principles--rules .about-principles__num {
  color: var(--amber);
}

.page-about .about-principles__body h3 {
  margin: 2px 0 0;
  font-family: var(--font-body);
  font-size: 16.5px;
  font-weight: 600;
  color: var(--paper);
}

.page-about .about-principles__body p {
  margin: 7px 0 0;
  font-size: 14.8px;
  line-height: 1.68;
  color: var(--muted);
}

/* ---------- 团队分工表 ---------- */

.page-about .about-table-wrap {
  margin-top: 22px;
  border: 1px solid var(--line);
  overflow-x: auto;
}

.page-about .about-table-wrap .data-table {
  min-width: 620px;
  width: 100%;
}

.page-about .about-table-caption {
  padding: 12px 14px 0;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  color: var(--muted);
}

/* ---------- 逐季时间轴 ---------- */

.page-about .about-timeline {
  position: relative;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(to bottom, var(--cyan-dim), var(--grid));
}

.page-about .about-timeline__item {
  position: relative;
  padding: 0 0 24px 32px;
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 7px;
  width: 14px;
  height: 14px;
  background: var(--ink);
  border: 2px solid var(--cyan-dim);
}

.page-about .about-timeline__item:last-child::before {
  background: var(--cyan);
  border-color: var(--cyan);
}

.page-about .about-timeline__season {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 600;
  line-height: 1.05;
  letter-spacing: -0.01em;
  color: var(--cyan);
}

.page-about .about-timeline__stage {
  display: block;
  margin-top: 5px;
  font-size: 14.8px;
  line-height: 1.65;
  color: var(--paper);
}

.page-about .about-timeline__meta {
  display: block;
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.page-about .about-timeline__item:hover .about-timeline__stage {
  color: var(--cyan);
}

.page-about .about-timeline__item:hover::before {
  border-color: var(--cyan);
}

/* ---------- 图片 ---------- */

.page-about .media {
  border: 1px solid var(--line);
}

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

.page-about .media--wide img {
  aspect-ratio: 16 / 10;
}

.page-about .media--square img {
  aspect-ratio: 4 / 3;
}

.page-about .media--tall img {
  aspect-ratio: 3 / 4;
}

.page-about .media-figure {
  padding: 9px 12px 11px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.page-about .about-figure {
  margin: 26px 0 0;
}

@media (min-width: 760px) {
  .page-about .about-figure--v {
    max-width: 62%;
  }
}

/* ---------- 引用块 ---------- */

.page-about .about-quote {
  margin: 24px 0 0;
  padding: 18px 20px;
  border-left: 4px solid var(--cyan-dim);
  background: var(--plate);
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink);
}

/* ---------- 底部动作 ---------- */

.page-about .about-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

/* ---------- 呼吸带 ---------- */

.page-about .breath {
  margin-block: clamp(24px, 4vw, 40px);
}

/* ---------- 窄屏保护 ---------- */

@media (max-width: 520px) {
  .page-about .about-principles__item {
    grid-template-columns: minmax(0, 1fr);
    gap: 8px;
  }

  .page-about .about-hero__facts {
    gap: 8px 16px;
  }
}
</PAGE_CSS>>>