.page-about {
  --about-left-bg: linear-gradient(135deg, #0F1A1C 0%, #1B3A4B 60%, #2D6A4F 100%);
  --about-timeline-line: #C9A96E;
  --about-dot-size: 14px;
  --about-transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  display: block;
  width: 100%;
  max-width: 100%;
  background-color: var(--color-bg-dark, #0F1A1C);
  color: var(--color-bg-light, #F4F1EA);
  font-family: var(--font-body, 'Lora', Georgia, serif);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ── 面包屑 ── */
.about-breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem 1.5rem;
  font-family: var(--font-heading, 'Montserrat', sans-serif);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-neutral, #6B7280);
  background-color: rgba(15, 26, 28, 0.6);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  border-bottom: 1px solid rgba(201, 169, 110, 0.15);
}
.about-breadcrumb a {
  color: var(--color-gold, #C9A96E);
  text-decoration: none;
  transition: color var(--about-transition);
}
.about-breadcrumb a:hover {
  color: var(--color-bg-light, #F4F1EA);
}
.about-breadcrumb__sep {
  color: var(--color-neutral, #6B7280);
  font-weight: 300;
}
.about-breadcrumb__current {
  color: var(--color-bg-light, #F4F1EA);
  opacity: 0.8;
}

/* ── 左右分屏容器 ── */
.about-split {
  display: flex;
  flex-direction: column;
  width: 100%;
  min-height: 70vh;
}

/* ── 左侧：品牌叙事 ── */
.about-split__left {
  display: flex;
  flex-direction: column;
  width: 100%;
  background: var(--about-left-bg);
  position: relative;
}

/* ── 英雄区（草原的辽阔与精准） ── */
.about-hero {
  position: relative;
  overflow: hidden;
  min-height: 50vh;
  display: flex;
  align-items: center;
  justify-content: center;
}
.about-hero__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 30%;
  opacity: 0.5;
  will-change: transform;
}
.about-hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(15,26,28,0.3) 0%, rgba(27,59,75,0.7) 60%, rgba(45,106,79,0.8) 100%);
  z-index: 1;
}
.about-hero__content {
  position: relative;
  z-index: 2;
  padding: 3rem 1.5rem;
  text-align: center;
  max-width: 640px;
}
.about-hero__title {
  font-family: var(--font-heading, 'Montserrat', sans-serif);
  font-size: 2rem;
  font-weight: 900;
  color: var(--color-bg-light, #F4F1EA);
  margin: 0 0 1rem;
  letter-spacing: -0.02em;
  line-height: 1.15;
  text-shadow: 0 2px 16px rgba(0,0,0,0.3);
}
.about-hero__subtitle {
  font-size: 0.95rem;
  color: rgba(244, 241, 234, 0.85);
  margin: 0 0 1.5rem;
  line-height: 1.7;
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
}
.about-hero__meta {
  display: flex;
  justify-content: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}
.about-hero__tag {
  display: inline-block;
  padding: 0.25rem 0.9rem;
  font-family: var(--font-heading, 'Montserrat', sans-serif);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-gold, #C9A96E);
  border: 1px solid var(--color-gold, #C9A96E);
  border-radius: 100px;
  background: rgba(201, 169, 110, 0.08);
}

/* ── 数据透明承诺 ── */
.about-commitment {
  display: flex;
  flex-direction: column;
  padding: 2.5rem 1.5rem;
  gap: 2rem;
  background: rgba(244, 241, 234, 0.04);
  border-top: 1px solid rgba(201, 169, 110, 0.12);
}
.about-commitment__text {
  flex: 1;
}
.about-commitment__title {
  font-family: var(--font-heading, 'Montserrat', sans-serif);
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--color-gold, #C9A96E);
  margin: 0 0 1rem;
  line-height: 1.2;
  letter-spacing: -0.01em;
}
.about-commitment__desc {
  font-size: 0.9rem;
  color: rgba(244, 241, 234, 0.8);
  margin: 0 0 1rem;
  line-height: 1.7;
}
.about-commitment__desc:last-of-type {
  margin-bottom: 1.25rem;
}
.about-commitment__links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}
.about-commitment__link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-heading, 'Montserrat', sans-serif);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-gold, #C9A96E);
  text-decoration: none;
  padding: 0.4rem 1rem;
  border: 1px solid rgba(201, 169, 110, 0.3);
  border-radius: 4px;
  transition: all var(--about-transition);
}
.about-commitment__link:hover {
  background: var(--color-gold, #C9A96E);
  color: var(--color-bg-dark, #0F1A1C);
  border-color: var(--color-gold, #C9A96E);
}
.about-commitment__visual {
  flex: 0 0 auto;
  max-width: 100%;
}
.about-commitment__chart {
  width: 100%;
  height: auto;
  max-width: 100%;
  border-radius: 4px;
  display: block;
  box-shadow: 0 4px 24px rgba(0,0,0,0.3);
}
.about-commitment__caption {
  font-size: 0.7rem;
  color: rgba(244, 241, 234, 0.5);
  margin: 0.5rem 0 0;
  text-align: center;
  font-style: italic;
}

/* ── 右侧：时间线 ── */
.about-split__right {
  display: flex;
  flex-direction: column;
  width: 100%;
  padding: 2.5rem 1.5rem;
  background: var(--color-bg-light, #F4F1EA);
  color: var(--color-bg-dark, #0F1A1C);
}

/* ── 品牌历程 ── */
.about-timeline {
  flex: 1;
}
.about-timeline__header {
  margin-bottom: 2rem;
}
.about-timeline__title {
  font-family: var(--font-heading, 'Montserrat', sans-serif);
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--color-sky, #1B3A4B);
  margin: 0 0 0.5rem;
  letter-spacing: -0.02em;
  line-height: 1.15;
  position: relative;
  display: inline-block;
}
.about-timeline__title::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 48px;
  height: 3px;
  background: var(--color-gold, #C9A96E);
  border-radius: 2px;
}
.about-timeline__intro {
  font-size: 0.9rem;
  color: var(--color-neutral, #6B7280);
  margin: 0.75rem 0 0;
  line-height: 1.6;
}
.about-timeline__items {
  position: relative;
  padding-left: 0;
}
.about-timeline__items::before {
  content: '';
  position: absolute;
  left: 6px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  background: var(--color-gold, #C9A96E);
  opacity: 0.35;
  border-radius: 1px;
}
.about-timeline__item {
  display: flex;
  gap: 0 0.75rem;
  margin-bottom: 1.75rem;
  position: relative;
}
.about-timeline__item:last-child {
  margin-bottom: 0;
}
.about-timeline__dot {
  flex: 0 0 14px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-gold, #C9A96E);
  border: 2px solid var(--color-bg-light, #F4F1EA);
  box-shadow: 0 0 0 2px var(--color-gold, #C9A96E);
  margin-top: 4px;
  z-index: 1;
  position: relative;
}
.about-timeline__content {
  flex: 1;
  min-width: 0;
}
.about-timeline__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  user-select: none;
  -webkit-user-select: none;
  padding: 0.25rem 0;
  border-radius: 4px;
  transition: background var(--about-transition);
}
.about-timeline__header:hover {
  background: rgba(201, 169, 110, 0.08);
}
.about-timeline__item-title {
  font-family: var(--font-heading, 'Montserrat', sans-serif);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-sky, #1B3A4B);
  margin: 0;
  line-height: 1.3;
  letter-spacing: -0.01em;
}
.about-timeline__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  font-size: 1.1rem;
  font-weight: 300;
  color: var(--color-gold, #C9A96E);
  transition: transform var(--about-transition);
  flex-shrink: 0;
}
.about-timeline__item[data-open] .about-timeline__icon {
  transform: rotate(0deg);
}
.about-timeline__item:not([data-open]) .about-timeline__icon {
  transform: rotate(-90deg);
}
.about-timeline__body {
  overflow: hidden;
  transition: max-height var(--about-transition);
  max-height: 600px;
}
.about-timeline__item:not([data-open]) .about-timeline__body {
  max-height: 0;
}
.about-timeline__summary {
  font-size: 0.85rem;
  color: var(--color-neutral, #6B7280);
  margin: 0.25rem 0 0.5rem;
  line-height: 1.5;
}
.about-timeline__detail {
  font-size: 0.85rem;
  color: var(--color-bg-dark, #0F1A1C);
  line-height: 1.7;
  padding: 0.5rem 0 0.25rem;
  border-top: 1px solid rgba(201, 169, 110, 0.15);
  margin-top: 0.25rem;
}
.about-timeline__detail p {
  margin: 0 0 0.5rem;
}
.about-timeline__detail p:last-child {
  margin-bottom: 0;
}
.about-timeline__footer {
  margin-top: 2rem;
  padding-top: 1.25rem;
  border-top: 1px solid rgba(201, 169, 110, 0.15);
}
.about-timeline__help {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-heading, 'Montserrat', sans-serif);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-sky, #1B3A4B);
  text-decoration: none;
  padding: 0.4rem 1rem;
  border: 1px solid var(--color-sky, #1B3A4B);
  border-radius: 4px;
  transition: all var(--about-transition);
}
.about-timeline__help:hover {
  background: var(--color-sky, #1B3A4B);
  color: var(--color-bg-light, #F4F1EA);
}

/* ── 装饰 ── */
.about-decor {
  margin-top: 2rem;
  text-align: center;
  opacity: 0.6;
}
.about-decor__img {
  width: 100%;
  max-width: 120px;
  height: auto;
  display: inline-block;
  border-radius: 2px;
}

/* ── 桌面端媒体查询 ── */
@media (min-width: 900px) {
  .about-breadcrumb {
    padding: 1rem 2.5rem;
    font-size: 0.8rem;
  }
  .about-split {
    flex-direction: row;
    min-height: 80vh;
  }
  .about-split__left {
    width: 58%;
    flex: 0 0 58%;
  }
  .about-split__right {
    width: 42%;
    flex: 0 0 42%;
    padding: 3rem 2.5rem;
  }
  .about-hero {
    min-height: 60vh;
  }
  .about-hero__content {
    padding: 4rem 3rem;
    max-width: 700px;
  }
  .about-hero__title {
    font-size: 3rem;
  }
  .about-hero__subtitle {
    font-size: 1.05rem;
  }
  .about-hero__tag {
    font-size: 0.75rem;
    padding: 0.3rem 1.1rem;
  }
  .about-commitment {
    flex-direction: row;
    padding: 3rem 3rem;
    gap: 3rem;
    align-items: flex-start;
  }
  .about-commitment__text {
    flex: 1;
  }
  .about-commitment__title {
    font-size: 1.8rem;
  }
  .about-commitment__desc {
    font-size: 0.95rem;
  }
  .about-commitment__visual {
    flex: 0 0 38%;
    max-width: 38%;
  }
  .about-commitment__chart {
    border-radius: 6px;
  }
  .about-timeline__title {
    font-size: 2rem;
  }
  .about-timeline__items::before {
    left: 8px;
  }
  .about-timeline__dot {
    flex: 0 0 18px;
    width: 18px;
    height: 18px;
    margin-top: 3px;
  }
  .about-timeline__item-title {
    font-size: 1.15rem;
  }
  .about-timeline__summary {
    font-size: 0.9rem;
  }
  .about-timeline__detail {
    font-size: 0.9rem;
  }
  .about-decor__img {
    max-width: 140px;
  }
}

@media (min-width: 1400px) {
  .about-split__left {
    width: 62%;
    flex: 0 0 62%;
  }
  .about-split__right {
    width: 38%;
    flex: 0 0 38%;
    padding: 4rem 3.5rem;
  }
  .about-hero__content {
    padding: 5rem 4rem;
    max-width: 780px;
  }
  .about-hero__title {
    font-size: 3.5rem;
  }
  .about-commitment {
    padding: 4rem 3.5rem;
  }
  .about-commitment__title {
    font-size: 2rem;
  }
  .about-timeline__title {
    font-size: 2.25rem;
  }
}
</style>
</main>