/* ===== 品牌档案页 · page-about ===== */

.page-about {
  --about-rail-w: 208px;
  --about-hair: rgba(42, 53, 80, 0.62);
  --about-panel: rgba(14, 21, 38, 0.62);
  padding-top: 88px;
  display: block;
  overflow-x: clip;
}

/* ---------- 面包屑 ---------- */
.page-about .about-top {
  padding: 0 0 8px;
}

.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--text-mute);
}

.page-about .breadcrumb a {
  color: var(--text-soft);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--t-fast) ease, border-color var(--t-fast) ease;
}

.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  color: var(--white);
  border-bottom-color: var(--blue);
}

.page-about .breadcrumb span[aria-current="page"] {
  color: var(--text-mute);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: 44px 0 76px;
  overflow: hidden;
}

.page-about .about-hero__wash {
  position: absolute;
  top: -34%;
  left: -26%;
  width: 128%;
  height: 172%;
  background: linear-gradient(135deg, rgba(61, 139, 255, 0.30) 0%, rgba(77, 240, 138, 0.10) 42%, rgba(7, 11, 22, 0) 70%);
  clip-path: polygon(0 0, 66% 0, 40% 100%, 0 100%);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  max-width: 820px;
}

.page-about .eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--green);
}

.page-about .about-hero__title {
  margin: 20px 0 0;
  font-size: clamp(34px, 6.4vw, 78px);
  font-weight: 200;
  line-height: 1.06;
  letter-spacing: -0.03em;
  color: var(--white);
  max-width: 16em;
}

.page-about .about-hero__lede {
  margin: 26px 0 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--text-soft);
}

.page-about .about-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 34px;
  margin: 32px 0 0;
  padding: 22px 0 0;
  list-style: none;
  border-top: 1px solid var(--about-hair);
}

.page-about .about-hero__meta li {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  font-size: 14px;
  color: var(--text-mute);
}

.page-about .about-hero__meta li::before {
  content: "";
  width: 14px;
  height: 1px;
  background: var(--steel);
  transform: translateY(-4px);
}

.page-about .about-hero__meta .data-num {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  font-style: normal;
  color: var(--white);
}

/* ---------- 主体两栏 ---------- */
.page-about .about-body {
  padding: 0 0 40px;
}

.page-about .about-body__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 36px;
}

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

/* 左侧索引 */
.page-about .about-rail__label {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-faint);
}

.page-about .about-rail__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-rail__list a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 14px;
  border: 1px solid var(--steel);
  border-radius: var(--radius-pill);
  font-size: 13px;
  color: var(--text-soft);
  text-decoration: none;
  transition: border-color var(--t-fast) ease, color var(--t-fast) ease;
}

.page-about .about-rail__list .num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--text-mute);
}

.page-about .about-rail__list a:hover,
.page-about .about-rail__list a:focus-visible {
  border-color: var(--green);
  color: var(--white);
}

/* ---------- 章节 ---------- */
.page-about .about-sec {
  position: relative;
  padding: 40px 0 0;
  margin: 0 0 76px;
  border-top: 1px solid rgba(42, 53, 80, 0.42);
}

.page-about .about-sec__head {
  display: flex;
  align-items: baseline;
  gap: 16px;
  margin-bottom: 22px;
}

.page-about .about-sec__head .index-num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--green);
}

.page-about .about-sec__head .section-title {
  margin: 0;
  font-size: clamp(23px, 3.1vw, 36px);
  font-weight: 500;
  line-height: 1.28;
  letter-spacing: -0.015em;
  color: var(--white);
}

.page-about .about-sec > p {
  margin: 0 0 20px;
  max-width: 68ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--text-soft);
}

.page-about .about-sec__tail {
  margin-top: 26px !important;
  padding-top: 20px;
  border-top: 1px solid rgba(42, 53, 80, 0.5);
  font-size: 15px !important;
}

.page-about .about-sec a {
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid rgba(61, 139, 255, 0.4);
  transition: color var(--t-fast) ease, border-color var(--t-fast) ease;
}

.page-about .about-sec a:hover,
.page-about .about-sec a:focus-visible {
  color: var(--green);
  border-bottom-color: var(--green);
}

/* ---------- 图片框 ---------- */
.page-about .about-figure {
  margin: 26px 0 30px;
  border: 1px solid var(--steel);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--ink-2);
  box-shadow: var(--shadow-soft);
}

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

.page-about .about-figure figcaption {
  padding: 13px 18px;
  border-top: 1px solid var(--steel);
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-mute);
}

.page-about .about-figure--strip img {
  aspect-ratio: 16 / 7;
}

/* ---------- 组别卡片 ---------- */
.page-about .about-groups {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .group-card {
  padding: 24px 22px;
  border: 1px solid var(--steel);
  border-radius: var(--radius-md);
  background: var(--about-panel);
  transition: border-color var(--t-fast) ease, transform var(--t-fast) ease, box-shadow var(--t-fast) ease;
}

.page-about .group-card:hover,
.page-about .group-card:focus-within,
.page-about .group-card:focus-visible {
  border-color: var(--green);
  transform: translateY(-2px);
  box-shadow: 0 14px 32px rgba(3, 6, 14, 0.5);
  outline: none;
}

.page-about .group-card__name {
  margin: 0;
  font-size: 19px;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--white);
}

.page-about .group-card__lead {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-mute);
}

.page-about .group-card__more {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows var(--t-mid) ease;
}

.page-about .group-card:hover .group-card__more,
.page-about .group-card:focus-within .group-card__more {
  grid-template-rows: 1fr;
}

.page-about .group-card__more-inner {
  overflow: hidden;
}

.page-about .group-card__more-inner p {
  margin: 16px 0 0;
  padding-top: 16px;
  border-top: 1px solid rgba(42, 53, 80, 0.7);
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-soft);
}

/* ---------- 三步流程 ---------- */
.page-about .flow {
  margin: 30px 0 4px;
}

.page-about .flow__track {
  display: block;
  width: 100%;
  height: 48px;
  margin-bottom: 2px;
}

.page-about .flow__steps {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .flow__step {
  position: relative;
  padding: 0 0 26px 22px;
  border-left: 1px solid var(--steel);
}

.page-about .flow__step:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}

.page-about .flow__step::before {
  content: "";
  position: absolute;
  left: -4px;
  top: 6px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 3px rgba(77, 240, 138, 0.14);
}

.page-about .flow__time {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--amber);
}

.page-about .flow__name {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 600;
  color: var(--white);
}

.page-about .flow__step p:last-child {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-soft);
}

/* ---------- 版本列表 ---------- */
.page-about .version-list {
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid rgba(42, 53, 80, 0.5);
}

.page-about .version {
  border-bottom: 1px solid rgba(42, 53, 80, 0.5);
}

.page-about .version__summary {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 6px 14px;
  padding: 18px 4px;
  cursor: pointer;
  list-style: none;
  color: var(--white);
  transition: background-color var(--t-fast) ease;
}

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

.page-about .version__summary:hover {
  background: rgba(27, 36, 56, 0.42);
}

.page-about .version__summary:focus-visible {
  outline: 1px solid var(--green);
  outline-offset: -2px;
}

.page-about .version__summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 16px;
  line-height: 1;
  color: var(--text-mute);
  transition: color var(--t-fast) ease;
}

.page-about .version[open] .version__summary::after {
  content: "–";
  color: var(--green);
}

.page-about .version__no {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--green);
}

.page-about .version__name {
  font-size: 16px;
  font-weight: 500;
}

.page-about .version__flag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--text-faint);
}

.page-about .version__body {
  padding: 0 4px 22px;
}

.page-about .version__body p {
  margin: 0;
  max-width: 66ch;
  font-size: 14px;
  line-height: 1.85;
  color: var(--text-soft);
}

/* ---------- 覆盖范围数据 ---------- */
.page-about .reach-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .reach-item {
  padding: 20px 18px;
  border: 1px solid var(--steel);
  border-radius: var(--radius-md);
  background: rgba(14, 21, 38, 0.42);
  transition: border-color var(--t-fast) ease;
}

.page-about .reach-item:hover {
  border-color: rgba(77, 240, 138, 0.5);
}

.page-about .reach-item__num {
  margin: 0 0 10px;
  line-height: 1;
}

.page-about .reach-item__num .data-num {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: clamp(34px, 5.4vw, 56px);
  font-weight: 700;
  line-height: 1;
  transform: skewX(-2deg);
}

.page-about .tone-green { color: var(--green); }
.page-about .tone-blue { color: var(--blue); }
.page-about .tone-orange { color: var(--orange); }
.page-about .tone-amber { color: var(--amber); }

.page-about .reach-item__label {
  margin: 0 0 8px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--white);
}

.page-about .reach-item__desc {
  margin: 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--text-mute);
}

/* ---------- 辽宁底色 ---------- */
.page-about .about-sec--roots {
  border-top-color: rgba(42, 53, 80, 0.42);
}

.page-about .roots-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
}

.page-about .roots-text p {
  margin: 0 0 18px;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-soft);
}

.page-about .roots-figure {
  margin: 4px 0 0;
}

/* ---------- 收束 ---------- */
.page-about .about-close {
  position: relative;
  padding: 68px 0 96px;
  border-top: 1px solid var(--about-hair);
  background:
    radial-gradient(120% 140% at 12% 0%, rgba(61, 139, 255, 0.18) 0%, rgba(7, 11, 22, 0) 58%),
    linear-gradient(180deg, rgba(14, 21, 38, 0.9) 0%, rgba(7, 11, 22, 0) 100%);
}

.page-about .about-close__inner {
  max-width: 880px;
}

.page-about .about-close__title {
  margin: 16px 0 0;
  font-size: clamp(24px, 3.6vw, 42px);
  font-weight: 300;
  line-height: 1.25;
  letter-spacing: -0.02em;
  color: var(--white);
}

.page-about .about-close__lede {
  margin: 20px 0 0;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-soft);
}

.page-about .about-close__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.page-about .about-close__note {
  margin: 26px 0 0;
  font-size: 13px;
  line-height: 1.8;
  color: var(--text-mute);
}

.page-about .about-close__note a {
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid rgba(61, 139, 255, 0.4);
  transition: color var(--t-fast) ease, border-color var(--t-fast) ease;
}

.page-about .about-close__note a:hover,
.page-about .about-close__note a:focus-visible {
  color: var(--green);
  border-bottom-color: var(--green);
}

/* ---------- 平板 ---------- */
@media (min-width: 720px) {
  .page-about {
    --about-rail-w: 190px;
  }

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

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

  .page-about .flow__steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 28px;
  }

  .page-about .flow__step {
    padding: 0;
    border-left: 0;
    text-align: center;
  }

  .page-about .flow__step:last-child {
    border-left-color: transparent;
  }

  .page-about .flow__step::before {
    display: none;
  }

  .page-about .flow__step {
    border-top: 1px solid transparent;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 1000px) {
  .page-about {
    --about-rail-w: 208px;
  }

  .page-about .about-hero {
    padding: 56px 0 92px;
  }

  .page-about .about-body__grid {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: 64px;
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: 104px;
  }

  .page-about .about-rail__list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 0;
  }

  .page-about .about-rail__list a {
    width: 100%;
    padding: 11px 0 11px 16px;
    border: 0;
    border-left: 1px solid var(--steel);
    border-radius: 0;
    font-size: 14px;
  }

  .page-about .about-rail__list a:hover,
  .page-about .about-rail__list a:focus-visible {
    border-left-color: var(--green);
    color: var(--white);
  }

  .page-about .about-sec {
    padding-top: 48px;
    margin-bottom: 92px;
  }

  .page-about .roots-layout {
    grid-template-columns: minmax(0, 1fr) minmax(0, 460px);
    gap: 48px;
    align-items: start;
  }

  .page-about .roots-figure {
    margin-top: 6px;
  }

  .page-about .about-close {
    padding: 88px 0 120px;
  }
}

/* ---------- 触屏设备：卡片摘要常开 ---------- */
@media (hover: none) {
  .page-about .group-card__more {
    grid-template-rows: 1fr;
  }
}

/* ---------- 减少动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .group-card,
  .page-about .group-card__more,
  .page-about .version__summary::after,
  .page-about .about-rail__list a,
  .page-about .breadcrumb a {
    transition: none;
  }

  .page-about .group-card:hover,
  .page-about .group-card:focus-within,
  .page-about .group-card:focus-visible {
    transform: none;
  }
}