/* ========== 品牌档案页面专属样式 ========== */
.page-about {
  --about-dot: 14px;
  --about-line-w: 3px;
  --about-line-left: 8px;
  --about-pad: 44px;
  background: var(--color-bg);
  overflow-x: hidden;
}

/* 章节头在本页的装饰性调整 */
.page-about .section-head {
  display: grid;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
}

.page-about .section-head__index {
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: clamp(3rem, 8vw, 5.5rem);
  line-height: 1;
  color: rgba(11, 59, 46, 0.1);
  letter-spacing: -0.05em;
}

.page-about .section-head__title {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: var(--text-h2);
  line-height: 1.2;
  color: var(--color-ink);
}

.page-about .section-head__desc {
  margin: 0;
  color: var(--color-gray);
  line-height: 1.8;
  max-width: 52ch;
}

/* ---------- 01 品牌概览 ---------- */
.page-about .about-hero {
  position: relative;
  padding: var(--space-8) 0 var(--space-8);
  background: linear-gradient(132deg, var(--color-primary) 0%, var(--color-ink) 100%);
  color: var(--color-white);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  right: -160px;
  top: -160px;
  width: 520px;
  height: 520px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(247, 127, 0, 0.35) 0%, rgba(247, 127, 0, 0) 68%);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: -80px;
  bottom: -110px;
  width: 300px;
  height: 300px;
  border-radius: 42px;
  background: linear-gradient(135deg, rgba(168, 194, 86, 0.24) 0%, rgba(168, 194, 86, 0) 70%);
  transform: rotate(24deg);
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: var(--space-6);
}

.page-about .about-hero__content {
  max-width: 640px;
}

.page-about .about-hero__eyebrow {
  display: inline-flex;
  align-items: center;
  margin-bottom: var(--space-4);
  padding: var(--space-2) var(--space-4);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.07);
  font-family: var(--font-heading);
  font-size: var(--text-small);
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-lime);
}

.page-about .about-hero__content h1 {
  margin: 0 0 var(--space-4);
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: clamp(2.4rem, 6vw, 4.2rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
}

.page-about .about-hero__lead {
  margin: 0;
  max-width: 58ch;
  font-size: 1.0625rem;
  line-height: 1.9;
  color: rgba(255, 255, 255, 0.84);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-3);
  margin-top: var(--space-6);
}

.page-about .about-hero__stat {
  padding: var(--space-4) var(--space-3);
  border: 1px solid rgba(255, 255, 255, 0.13);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.07);
  backdrop-filter: blur(6px);
}

.page-about .about-hero__num {
  display: block;
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 2.125rem;
  line-height: 1;
  color: var(--color-accent);
}

.page-about .about-hero__label {
  display: block;
  margin-top: var(--space-2);
  font-size: var(--text-small);
  line-height: 1.4;
  color: rgba(255, 255, 255, 0.72);
}

.page-about .about-hero__visual {
  overflow: hidden;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  transform: rotate(-0.6deg);
}

.page-about .about-hero__img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------- 02 发展路线 ---------- */
.page-about .journey {
  padding: var(--space-8) 0 var(--space-9);
  background: linear-gradient(165deg, var(--color-primary) 0%, #0A3026 100%);
}

.page-about .journey .section-head__index {
  color: rgba(255, 255, 255, 0.16);
}

.page-about .journey .section-head__title {
  color: var(--color-white);
}

.page-about .journey .section-head__desc {
  color: rgba(255, 255, 255, 0.68);
}

.page-about .journey__list {
  position: relative;
  margin-top: var(--space-7);
  padding-left: var(--about-pad);
}

.page-about .journey__list::before {
  content: "";
  position: absolute;
  left: var(--about-line-left);
  top: 8px;
  bottom: 40px;
  width: var(--about-line-w);
  border-radius: var(--radius-pill);
  background: linear-gradient(180deg, var(--color-accent) 0%, var(--color-lime) 100%);
}

.page-about .journey__item {
  position: relative;
  margin-bottom: var(--space-6);
}

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

.page-about .journey__item::before {
  content: "";
  position: absolute;
  left: calc(var(--about-line-left) - var(--about-pad) - var(--about-dot) * 0.5);
  top: 18px;
  box-sizing: border-box;
  width: var(--about-dot);
  height: var(--about-dot);
  border: 4px solid var(--color-accent);
  border-radius: 50%;
  background: var(--color-white);
  box-shadow: 0 0 0 3px var(--color-primary);
}

.page-about .journey__year {
  margin-bottom: var(--space-2);
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 3rem;
  line-height: 1;
  color: var(--color-accent);
}

.page-about .journey__card {
  padding: var(--space-5);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.06);
  transition: transform var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
}

.page-about .journey__card:hover {
  transform: translateY(-6px);
  border-color: rgba(247, 127, 0, 0.5);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.28);
}

.page-about .journey__title {
  margin: 0 0 var(--space-2);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-white);
}

.page-about .journey__text {
  margin: 0;
  font-size: var(--text-small);
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.76);
}

/* ---------- 03 内容组织方式 ---------- */
.page-about .content-model {
  padding: var(--space-8) 0 var(--space-8);
  background: var(--color-white);
}

.page-about .content-model__inner {
  display: grid;
  gap: var(--space-6);
}

.page-about .content-model__visual {
  overflow: hidden;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.page-about .content-model__img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.page-about .content-model__visual:hover .content-model__img {
  transform: scale(1.02);
}

.page-about .content-model__lead {
  margin: var(--space-4) 0;
  line-height: 1.9;
  color: var(--color-ink);
}

.page-about .content-model__list,
.page-about .editorial__list {
  margin: 0 0 var(--space-5);
  padding: 0;
  list-style: none;
}

.page-about .content-model__list li,
.page-about .editorial__list li {
  position: relative;
  padding: var(--space-3) 0 var(--space-3) var(--space-6);
  border-bottom: 1px solid var(--color-border);
  color: var(--color-gray);
  line-height: 1.75;
}

.page-about .content-model__list li::before,
.page-about .editorial__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 1.25rem;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-accent);
}

.page-about .content-model__list li:last-child,
.page-about .editorial__list li:last-child {
  border-bottom: none;
}

/* ---------- 04 乐竟电脑端导航设计 ---------- */
.page-about .nav-system {
  padding: var(--space-8) 0 var(--space-8);
  background: var(--color-bg);
}

.page-about .nav-system__grid {
  display: grid;
  gap: var(--space-5);
}

.page-about .nav-system__card {
  position: relative;
  padding: var(--space-6);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-white);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.page-about .nav-system__card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.page-about .nav-system__tag {
  display: inline-block;
  margin-bottom: var(--space-4);
}

.page-about .nav-system__card h3 {
  margin: 0 0 var(--space-3);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.25rem;
}

.page-about .nav-system__card p {
  margin: 0;
  color: var(--color-gray);
  line-height: 1.8;
}

/* ---------- 05 运营与编辑准则 ---------- */
.page-about .editorial {
  padding: var(--space-8) 0 var(--space-8);
  background: linear-gradient(135deg, var(--color-ink) 0%, var(--color-primary) 100%);
  color: var(--color-white);
}

.page-about .editorial .section-head__index {
  color: rgba(255, 255, 255, 0.16);
}

.page-about .editorial .section-head__title {
  color: var(--color-white);
}

.page-about .editorial .section-head__desc {
  color: rgba(255, 255, 255, 0.68);
}

.page-about .editorial__inner {
  display: grid;
  gap: var(--space-6);
}

.page-about .editorial__visual {
  overflow: hidden;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

.page-about .editorial__img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .editorial__list li {
  border-bottom-color: rgba(255, 255, 255, 0.16);
  color: rgba(255, 255, 255, 0.84);
}

.page-about .editorial__list li::before {
  background: var(--color-lime);
}

.page-about .editorial__list strong {
  color: var(--color-white);
  font-weight: 500;
}

/* ---------- 06 信息安全与合规 ---------- */
.page-about .compliance {
  padding: var(--space-8) 0 var(--space-8);
  background: var(--color-bg);
}

.page-about .compliance__panel {
  padding: var(--space-6);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-white);
  box-shadow: var(--shadow-md);
}

.page-about .compliance__dl {
  margin: 0;
  padding: 0;
}

.page-about .compliance__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-1);
  padding: var(--space-4) 0;
  border-bottom: 1px dashed var(--color-border);
}

.page-about .compliance__row:first-child {
  padding-top: 0;
}

.page-about .compliance__row:last-of-type {
  border-bottom: none;
  padding-bottom: 0;
}

.page-about .compliance__row dt {
  font-size: var(--text-small);
  color: var(--color-gray);
  font-weight: 500;
}

.page-about .compliance__row dd {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.0625rem;
  color: var(--color-ink);
}

.page-about .compliance__note {
  margin: var(--space-5) 0 var(--space-6);
  padding: var(--space-4);
  border-left: 4px solid var(--color-accent);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  background: rgba(247, 127, 0, 0.06);
  color: var(--color-gray);
  line-height: 1.8;
}

.page-about .compliance__links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

/* ---------- 页尾行动区 ---------- */
.page-about .about-cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  margin: 0 auto var(--space-8);
  padding: var(--space-5) var(--space-6);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: linear-gradient(120deg, rgba(11, 59, 46, 0.06), rgba(247, 127, 0, 0.08));
}

.page-about .about-cta p {
  margin: 0;
  color: var(--color-ink);
  font-weight: 500;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

/* ---------- 响应式：平板与桌面 ---------- */
@media (min-width: 720px) {
  .page-about .about-hero__inner {
    grid-template-columns: 1.1fr 0.9fr;
    align-items: center;
  }

  .page-about .about-hero__visual {
    aspect-ratio: 4 / 3;
  }

  .page-about .content-model__inner,
  .page-about .editorial__inner {
    grid-template-columns: 0.95fr 1.05fr;
    align-items: center;
  }

  .page-about .content-model__visual,
  .page-about .editorial__visual {
    aspect-ratio: 4 / 3;
  }

  .page-about .nav-system__grid {
    grid-template-columns: 1fr 1fr;
  }

  .page-about .compliance__row {
    grid-template-columns: 200px 1fr;
  }

  .page-about .about-cta {
    flex-wrap: nowrap;
  }
}

/* 桌面端时间轴交替排列 */
@media (min-width: 860px) {
  .page-about .journey__list {
    --about-pad: 0;
    padding-left: 0;
  }

  .page-about .journey__list::before {
    left: 50%;
    transform: translateX(-50%);
  }

  .page-about .journey__item {
    width: calc(50% - var(--space-7));
    margin-left: auto;
    margin-bottom: var(--space-7);
  }

  .page-about .journey__item:nth-child(odd) {
    margin-left: 0;
  }

  .page-about .journey__item::before {
    left: auto;
    right: calc(-1 * var(--space-7) - var(--about-dot) * 0.5);
  }

  .page-about .journey__item:nth-child(odd)::before {
    right: auto;
    left: calc(-1 * var(--space-7) - var(--about-dot) * 0.5);
  }

  .page-about .journey__year {
    font-size: 3.5rem;
  }

  .page-about .journey__card {
    padding: var(--space-6);
  }
}

/* 为左侧轨道目录预留安全空间 */
@media (min-width: 1100px) {
  .page-about .about-hero__inner,
  .page-about .journey > .site-container,
  .page-about .content-model > .site-container,
  .page-about .nav-system > .site-container,
  .page-about .editorial > .site-container,
  .page-about .compliance > .site-container,
  .page-about .about-cta {
    padding-left: calc(var(--space-5) + 96px);
  }
}