/* ===== 品牌故事页 / about ===== */
.page-about {
  --about-rail-w: 250px;
  background:
    linear-gradient(rgba(157, 78, 221, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(157, 78, 221, 0.07) 1px, transparent 1px);
  background-size: 42px 42px;
  position: relative;
  isolation: isolate;
  overflow-x: clip;
}
.page-about::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(ellipse 480px 320px at 12% 8%, rgba(157, 78, 221, 0.14), transparent 60%),
    radial-gradient(ellipse 520px 360px at 88% 52%, rgba(255, 107, 53, 0.1), transparent 58%),
    radial-gradient(ellipse 420px 300px at 55% 88%, rgba(230, 57, 70, 0.07), transparent 62%);
}

/* 首屏声明区 */
.page-about .about-hero {
  padding: 48px 0 36px;
  border-bottom: 1px solid rgba(255, 107, 53, 0.28);
}
.page-about .breadcrumb {
  margin-bottom: 28px;
}
.page-about .breadcrumb a:hover {
  color: var(--orange);
}
.page-about .about-hero__layout {
  display: grid;
  gap: 24px;
}
.page-about .about-hero__aside {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  justify-content: space-between;
}
.page-about .about-hero__chip {
  display: inline-block;
  padding: 4px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--orange);
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: rgba(255, 107, 53, 0.08);
}
.page-about .about-hero__vertical {
  writing-mode: vertical-rl;
  font-family: var(--font-display);
  font-size: 18px;
  letter-spacing: 0.24em;
  color: rgba(160, 178, 209, 0.5);
  margin: 0;
  white-space: nowrap;
}
.page-about .about-hero__main {
  position: relative;
}
.page-about .about-hero__main::before {
  content: "";
  display: block;
  width: 64px;
  height: 6px;
  margin-bottom: 18px;
  background: linear-gradient(90deg, var(--orange) 0 60%, var(--purple) 60% 100%);
  transform: skewX(-32deg);
}
.page-about .about-hero__main h1 {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-size: clamp(30px, 5vw, 52px);
  line-height: 1.12;
  color: var(--silver);
  letter-spacing: 0.02em;
  text-transform: uppercase;
  max-width: 880px;
}
.page-about .about-hero__lead {
  margin: 0;
  max-width: 720px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--muted);
}

/* 叙事主体 */
.page-about .about-story {
  padding: 36px 0 64px;
}
.page-about .about-story__layout {
  display: grid;
  gap: 28px;
}

/* 左侧索引 */
.page-about .about-story__rail {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.05);
  padding: 12px;
}
.page-about .about-rail {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: thin;
}
.page-about .about-rail__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid transparent;
  color: var(--muted);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--transition), border-color var(--transition), background var(--transition);
}
.page-about .about-rail__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--purple);
  box-shadow: 0 0 10px rgba(157, 78, 221, 0.8);
  flex: none;
}
.page-about .about-rail__link:hover {
  color: var(--silver);
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.06);
}
.page-about .about-story__rail-btn {
  display: none;
  margin-top: 16px;
  width: 100%;
  justify-content: center;
}

/* 右侧章节基础 */
.page-about .about-story__content {
  min-width: 0;
}
.page-about .about-section {
  padding: 32px 0;
  border-bottom: 1px solid rgba(160, 178, 209, 0.16);
  scroll-margin-top: calc(var(--header-h) + 30px);
}
.page-about .about-section:last-child {
  border-bottom: none;
}
.page-about .about-section__index {
  font-family: var(--font-display);
  font-size: 48px;
  line-height: 1;
  color: rgba(157, 78, 221, 0.3);
  margin-bottom: 12px;
}
.page-about .about-section__body h2 {
  margin: 8px 0 16px;
  font-family: var(--font-display);
  font-size: clamp(24px, 3vw, 34px);
  color: var(--silver);
  letter-spacing: 0.02em;
  line-height: 1.2;
}
.page-about .about-section__body > p {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--silver);
  max-width: 640px;
}
.page-about .about-section__body img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  border: 1px solid rgba(255, 107, 53, 0.28);
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.3);
}

/* 里程碑数据 */
.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin: 24px 0 28px;
}
.page-about .about-stat {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 107, 53, 0.28);
  border-radius: 14px;
  padding: 16px 14px;
  position: relative;
  overflow: hidden;
}
.page-about .about-stat::after {
  content: "";
  position: absolute;
  right: -12px;
  bottom: -12px;
  width: 40px;
  height: 40px;
  background: conic-gradient(from 120deg, transparent 60%, rgba(230, 57, 70, 0.35) 100%);
  border-radius: 50%;
}
.page-about .about-stat strong {
  display: block;
  font-family: var(--font-display);
  font-size: 30px;
  line-height: 1.1;
  color: var(--orange);
}
.page-about .about-stat strong span {
  font-size: 20px;
  color: var(--purple);
}
.page-about .about-stat em {
  display: block;
  margin-top: 6px;
  font-style: normal;
  font-size: 13px;
  color: var(--muted);
}

/* 时间线 */
.page-about .about-timeline {
  list-style: none;
  margin: 28px 0;
  padding: 0;
  position: relative;
}
.page-about .about-timeline__item {
  position: relative;
  padding-left: 36px;
  margin-bottom: 28px;
}
.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--purple);
  box-shadow: 0 0 0 4px rgba(157, 78, 221, 0.18), 0 0 20px rgba(157, 78, 221, 0.7);
  z-index: 1;
  transition: transform var(--transition), box-shadow var(--transition);
}
.page-about .about-timeline__item:not(:last-child)::after {
  content: "";
  position: absolute;
  left: 13px;
  top: 22px;
  bottom: -6px;
  width: 2px;
  background: linear-gradient(180deg, var(--purple), var(--orange));
  transform: skewX(-14deg);
  opacity: 0.8;
}
.page-about .about-timeline__item:hover::before {
  transform: scale(1.35);
  box-shadow: 0 0 0 7px rgba(157, 78, 221, 0.22), 0 0 30px rgba(157, 78, 221, 0.95);
}
.page-about .about-timeline__year {
  display: block;
  font-family: var(--font-display);
  font-size: 28px;
  line-height: 1.1;
  color: var(--orange);
  margin-bottom: 6px;
  letter-spacing: 0.05em;
  transition: transform var(--transition), color var(--transition);
}
.page-about .about-timeline__item:hover .about-timeline__year {
  transform: scale(1.06);
  transform-origin: left center;
  color: var(--lime);
}
.page-about .about-timeline__card h3 {
  margin: 0 0 8px;
  font-size: 17px;
  color: var(--silver);
}
.page-about .about-timeline__card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

/* 我们相信 */
.page-about .about-belief__grid {
  display: grid;
  gap: 14px;
  margin-top: 22px;
}
.page-about .about-belief__card {
  background: linear-gradient(135deg, rgba(255, 107, 53, 0.12) 0%, rgba(255, 255, 255, 0.06) 30%);
  border: 1px solid rgba(160, 178, 209, 0.2);
  border-left: 4px solid var(--orange);
  border-radius: 4px 14px 14px 4px;
  padding: 18px;
  position: relative;
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
}
.page-about .about-belief__card::after {
  content: "";
  position: absolute;
  right: -20px;
  top: -20px;
  width: 44px;
  height: 44px;
  background: var(--orange);
  transform: rotate(45deg);
  opacity: 0.5;
}
.page-about .about-belief__card:nth-child(2) {
  border-left-color: var(--purple);
}
.page-about .about-belief__card:nth-child(2)::after {
  background: var(--purple);
}
.page-about .about-belief__card:nth-child(3) {
  border-left-color: var(--chili);
}
.page-about .about-belief__card:nth-child(3)::after {
  background: var(--chili);
}
.page-about .about-belief__card:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 34px rgba(0, 0, 0, 0.25);
}
.page-about .about-belief__card h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 22px;
  letter-spacing: 0.04em;
  color: var(--orange);
}
.page-about .about-belief__card:nth-child(2) h3 {
  color: var(--purple);
}
.page-about .about-belief__card:nth-child(3) h3 {
  color: var(--chili);
}
.page-about .about-belief__card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

/* 湖南根据地 */
.page-about .about-hunan {
  position: relative;
}
.page-about .about-hunan::before {
  content: "";
  position: absolute;
  right: -20px;
  top: 12%;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  border: 1px dashed rgba(157, 78, 221, 0.5);
  box-shadow:
    0 0 0 20px rgba(157, 78, 221, 0.05),
    0 0 0 40px rgba(157, 78, 221, 0.03),
    inset 0 0 60px rgba(255, 107, 53, 0.06);
  background: radial-gradient(circle at 42% 40%, rgba(157, 78, 221, 0.18), transparent 60%);
  pointer-events: none;
  z-index: 0;
}
.page-about .about-hunan .about-section__body {
  position: relative;
  z-index: 1;
}
.page-about .about-hunan__feature {
  display: grid;
  gap: 16px;
  margin: 24px 0;
}
.page-about .about-hunan__feature img {
  object-fit: cover;
}
.page-about .about-hunan__note {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  background: rgba(230, 57, 70, 0.08);
  border: 1px solid rgba(230, 57, 70, 0.3);
  border-radius: 14px;
  padding: 18px;
}
.page-about .about-hunan__note-chili {
  flex: none;
  width: 14px;
  height: 34px;
  border-radius: 50% 50% 50% 50% / 60% 60% 40% 40%;
  background: linear-gradient(120deg, #ff6b35, #e63946);
  transform: rotate(32deg);
  box-shadow: 0 0 16px rgba(230, 57, 70, 0.5);
}
.page-about .about-hunan__note p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--silver);
}
.page-about .about-hunan__footer {
  margin: 20px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}
.page-about .about-hunan__footer a {
  color: var(--orange);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 107, 53, 0.4);
  transition: border-color var(--transition), color var(--transition);
}
.page-about .about-hunan__footer a:hover {
  color: var(--lime);
  border-color: var(--lime);
}

/* 桌面端布局 */
@media (min-width: 900px) {
  .page-about .about-hero {
    padding: 72px 0 52px;
  }
  .page-about .about-hero__layout {
    grid-template-columns: 200px 1fr;
    gap: 48px;
  }
  .page-about .about-hero__aside {
    flex-direction: column;
    align-items: flex-start;
  }
  .page-about .about-story__layout {
    grid-template-columns: var(--about-rail-w) 1fr;
    gap: 56px;
    align-items: start;
  }
  .page-about .about-story__rail {
    position: sticky;
    top: calc(var(--header-h) + 28px);
    align-self: start;
    padding: 18px;
  }
  .page-about .about-rail {
    flex-direction: column;
    gap: 0;
    overflow: visible;
  }
  .page-about .about-rail__item {
    position: relative;
  }
  .page-about .about-rail__link {
    padding: 12px 16px;
    border-radius: 0;
    border: none;
    border-left: 2px solid rgba(157, 78, 221, 0.35);
    position: relative;
  }
  .page-about .about-rail__link::before {
    content: "";
    position: absolute;
    left: -5px;
    top: 16px;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--purple);
    box-shadow: 0 0 12px rgba(157, 78, 221, 0.7);
    transition: transform var(--transition), background var(--transition);
  }
  .page-about .about-rail__link:hover::before {
    transform: scale(1.4);
    background: var(--lime);
  }
  .page-about .about-rail__link:hover {
    background: rgba(255, 255, 255, 0.06);
    color: var(--orange);
  }
  .page-about .about-story__rail-btn {
    display: inline-flex;
  }
  .page-about .about-section {
    padding: 44px 0;
  }
  .page-about .about-stats {
    grid-template-columns: repeat(4, 1fr);
  }
  .page-about .about-belief__grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .page-about .about-hunan__feature {
    grid-template-columns: 1fr 1fr;
    align-items: center;
  }
}