/* ===== 品牌档案 page-about 专属样式 ===== */
.page-about {
  --about-grid-gap: 2rem;
  --about-section-pad: 4rem 0;
  --about-radius-card: 16px;
  --about-bg-alt: #F0F4FF;
  display: block;
  width: 100%;
}

/* ---------- 面包屑 ---------- */
.about-breadcrumb {
  padding: 1rem 0 0.5rem;
  font-family: var(--font-body, 'Noto Sans SC', sans-serif);
  font-size: 0.875rem;
  color: var(--text-primary, #121212);
  opacity: 0.7;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
}
.about-breadcrumb a {
  color: var(--blue, #1E90FF);
  text-decoration: none;
  transition: color var(--transition, 0.25s ease);
}
.about-breadcrumb a:hover,
.about-breadcrumb a:focus-visible {
  color: var(--orange, #FF6B35);
  text-decoration: underline;
}
.about-breadcrumb-sep {
  user-select: none;
  opacity: 0.5;
}

/* ---------- 首屏英雄区 ---------- */
.about-hero {
  background-color: var(--bg-dark, #1A1A2E);
  background-image:
    repeating-linear-gradient(0deg, transparent 0px, transparent 40px, rgba(30, 144, 255, 0.045) 40px, rgba(30, 144, 255, 0.045) 41px),
    repeating-linear-gradient(90deg, transparent 0px, transparent 40px, rgba(30, 144, 255, 0.045) 40px, rgba(30, 144, 255, 0.045) 41px);
  padding: 2.5rem 0 3rem;
  position: relative;
  overflow: hidden;
}
.about-hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 6px;
  background: linear-gradient(90deg, var(--blue, #1E90FF) 30%, var(--orange, #FF6B35) 80%);
  transform: skewY(-1deg);
  transform-origin: left center;
}
.about-hero-inner {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  align-items: center;
}
.about-hero-text {
  flex: 1 1 55%;
  text-align: center;
}
.about-hero-title {
  font-family: var(--font-heading, Impact, 'Arial Black', sans-serif);
  font-size: clamp(2.8rem, 10vw, 5.2rem);
  font-weight: 900;
  line-height: 1;
  color: var(--text-on-dark, #FFFFFF);
  margin: 0 0 0.6rem;
  transform: rotate(-2.5deg);
  transform-origin: left center;
  letter-spacing: 0.02em;
  text-shadow: 0 2px 12px rgba(30, 144, 255, 0.3);
}
.about-hero-sub {
  font-family: var(--font-body, 'Noto Sans SC', sans-serif);
  font-size: clamp(0.95rem, 2.2vw, 1.25rem);
  color: var(--orange, #FF6B35);
  margin: 0 0 0.6rem;
  font-weight: 600;
  letter-spacing: 0.08em;
}
.about-hero-note {
  font-family: var(--font-body, 'Noto Sans SC', sans-serif);
  font-size: clamp(0.8rem, 1.6vw, 0.95rem);
  color: rgba(255, 255, 255, 0.65);
  margin: 0;
  max-width: 460px;
  line-height: 1.5;
}
.about-hero-image {
  flex: 0 0 auto;
  max-width: 100%;
}
.about-hero-img {
  display: block;
  width: 100%;
  max-width: 500px;
  height: auto;
  aspect-ratio: 500 / 400;
  object-fit: cover;
  border-radius: var(--radius-lg, 16px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
  transform: rotate(0.8deg);
  transition: transform var(--transition, 0.25s ease);
}
.about-hero-img:hover {
  transform: rotate(0deg) scale(1.01);
}

/* ---------- 我们的故事 ---------- */
.about-story {
  background-color: var(--bg-light, #FAFAFA);
  padding: var(--about-section-pad, 4rem 0);
}
.about-story-inner {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}
.about-story-main {
  flex: 1 1 65%;
}
.about-story-heading {
  font-family: var(--font-heading, Impact, 'Arial Black', sans-serif);
  font-size: clamp(1.8rem, 4.5vw, 2.8rem);
  color: var(--text-primary, #121212);
  margin: 0 0 1.2rem;
  line-height: 1.2;
  position: relative;
  padding-left: 1rem;
  border-left: 5px solid var(--blue, #1E90FF);
}
.about-story-text {
  font-family: var(--font-body, 'Noto Sans SC', sans-serif);
  font-size: clamp(0.95rem, 1.6vw, 1.05rem);
  line-height: 1.7;
  color: var(--text-primary, #121212);
  margin: 0 0 1rem;
  max-width: 720px;
}
.about-story-link {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  margin-top: 0.5rem;
  font-size: 0.95rem;
}
.about-story-side {
  flex: 0 0 280px;
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}
.about-story-img {
  display: block;
  width: 100%;
  max-width: 300px;
  height: auto;
  aspect-ratio: 300 / 200;
  object-fit: cover;
  border-radius: var(--radius-md, 8px);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
  filter: saturate(0.85);
}
.about-story-quote {
  font-family: var(--font-body, 'Noto Sans SC', sans-serif);
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--blue, #1E90FF);
  border-left: 3px solid var(--orange, #FF6B35);
  padding-left: 1rem;
  margin: 0;
  font-style: italic;
  opacity: 0.85;
}

/* ---------- 核心价值观 ---------- */
.about-values {
  background-color: var(--bg-dark, #1A1A2E);
  padding: var(--about-section-pad, 4rem 0);
  position: relative;
}
.about-values::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--orange, #FF6B35), var(--blue, #1E90FF));
}
.about-values-heading {
  font-family: var(--font-heading, Impact, 'Arial Black', sans-serif);
  font-size: clamp(1.8rem, 4.5vw, 2.8rem);
  color: var(--text-on-dark, #FFFFFF);
  margin: 0 0 2rem;
  text-align: center;
  letter-spacing: 0.04em;
}
.about-values-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-grid-gap, 2rem);
}
.about-value-card {
  background-color: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(30, 144, 255, 0.2);
  border-radius: var(--about-radius-card, 16px);
  overflow: hidden;
  transition: border-color var(--transition, 0.25s ease), box-shadow var(--transition, 0.25s ease);
  cursor: default;
}
.about-value-card[open] {
  border-color: var(--blue, #1E90FF);
  box-shadow: 0 0 0 2px rgba(30, 144, 255, 0.15);
}
.about-value-summary {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem 1.5rem;
  cursor: pointer;
  list-style: none;
  user-select: none;
}
.about-value-summary::-webkit-details-marker {
  display: none;
}
.about-value-summary::marker {
  display: none;
  content: '';
}
.about-value-icon-wrap {
  flex: 0 0 60px;
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: rgba(30, 144, 255, 0.1);
  border-radius: 50%;
  transition: background-color var(--transition, 0.25s ease);
}
.about-value-card[open] .about-value-icon-wrap {
  background-color: rgba(30, 144, 255, 0.2);
}
.about-value-icon-wrap--alt {
  background-color: rgba(255, 107, 53, 0.08);
}
.about-value-card[open] .about-value-icon-wrap--alt {
  background-color: rgba(255, 107, 53, 0.18);
}
.about-value-icon {
  display: block;
  width: 48px;
  height: 48px;
  object-fit: contain;
  border-radius: 0;
}
.about-value-svg {
  display: block;
}
.about-value-header {
  flex: 1;
  min-width: 0;
}
.about-value-title {
  font-family: var(--font-heading, Impact, 'Arial Black', sans-serif);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-on-dark, #FFFFFF);
  margin: 0 0 0.15rem;
  line-height: 1.3;
}
.about-value-brief {
  font-family: var(--font-body, 'Noto Sans SC', sans-serif);
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.7);
  margin: 0;
  line-height: 1.4;
}
.about-value-detail {
  padding: 0 1.5rem 1.25rem;
  font-family: var(--font-body, 'Noto Sans SC', sans-serif);
  font-size: 0.9rem;
  line-height: 1.65;
  color: rgba(255, 255, 255, 0.85);
  border-top: 1px solid rgba(30, 144, 255, 0.12);
  margin-top: 0;
  padding-top: 0.9rem;
}
.about-value-detail p {
  margin: 0;
  max-width: 580px;
}

/* ---------- 数据透明度 ---------- */
.about-transparency {
  background-color: var(--about-bg-alt, #F0F4FF);
  padding: var(--about-section-pad, 4rem 0);
}
.about-transparency-heading {
  font-family: var(--font-heading, Impact, 'Arial Black', sans-serif);
  font-size: clamp(1.6rem, 4vw, 2.5rem);
  color: var(--text-primary, #121212);
  margin: 0 0 2rem;
  text-align: center;
}
.about-transparency-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}
.about-transparency-item {
  background-color: var(--bg-light, #FAFAFA);
  border-radius: var(--radius-md, 8px);
  padding: 1.5rem;
  border-left: 5px solid var(--blue, #1E90FF);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
  transition: box-shadow var(--transition, 0.25s ease), transform var(--transition, 0.25s ease);
}
.about-transparency-item:hover {
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
  transform: translateY(-2px);
}
.about-transparency-num {
  font-family: var(--font-heading, Impact, 'Arial Black', sans-serif);
  font-size: 1.8rem;
  font-weight: 900;
  color: var(--blue, #1E90FF);
  opacity: 0.3;
  display: block;
  margin-bottom: 0.25rem;
  line-height: 1;
}
.about-transparency-title {
  font-family: var(--font-heading, Impact, 'Arial Black', sans-serif);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary, #121212);
  margin: 0 0 0.4rem;
}
.about-transparency-desc {
  font-family: var(--font-body, 'Noto Sans SC', sans-serif);
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--text-primary, #121212);
  margin: 0;
  max-width: 600px;
}

/* ---------- 信任声明区 ---------- */
.about-trust {
  background-color: var(--bg-dark, #1A1A2E);
  padding: 2.5rem 0 3.5rem;
  text-align: center;
}
.about-trust-text {
  font-family: var(--font-body, 'Noto Sans SC', sans-serif);
  font-size: clamp(0.85rem, 1.6vw, 1rem);
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.8);
  margin: 0 auto 1.5rem;
  max-width: 780px;
  padding: 0 1rem;
}
.about-trust-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
}
.about-trust-links .btn {
  min-width: 140px;
  font-size: 0.95rem;
}

/* ---------- 返回顶部 ---------- */
.about-scroll-top {
  position: fixed;
  bottom: 2rem;
  right: 1.5rem;
  z-index: 100;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background-color: var(--blue, #1E90FF);
  color: #fff;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 14px rgba(30, 144, 255, 0.35);
  transition: opacity var(--transition, 0.25s ease), transform var(--transition, 0.25s ease);
}
.about-scroll-top[hidden] {
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
}
.about-scroll-top:not([hidden]) {
  opacity: 1;
  transform: translateY(0);
}
.about-scroll-top:hover,
.about-scroll-top:focus-visible {
  background-color: var(--orange, #FF6B35);
  box-shadow: 0 6px 20px rgba(255, 107, 53, 0.4);
  transform: scale(1.05);
}

/* ===== 桌面端媒体查询 ===== */
@media (min-width: 768px) {
  .about-hero {
    padding: 3rem 0 4rem;
  }
  .about-hero-inner {
    flex-direction: row;
    text-align: left;
    gap: 3rem;
  }
  .about-hero-text {
    text-align: left;
  }
  .about-hero-note {
    margin-left: 0;
  }
  .about-hero-title {
    transform: rotate(-3deg);
  }

  .about-story-inner {
    flex-direction: row;
    align-items: flex-start;
    gap: 3rem;
  }
  .about-story-side {
    flex-shrink: 0;
    margin-top: 2.5rem;
  }

  .about-values-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .about-value-card {
    min-height: 200px;
  }

  .about-transparency-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
  }
  .about-transparency-item {
    padding: 2rem 1.5rem;
  }

  .about-breadcrumb {
    padding: 1.5rem 0 0.75rem;
  }
}

@media (min-width: 1024px) {
  .about-hero {
    padding: 4rem 0 5rem;
  }
  .about-hero-inner {
    gap: 4rem;
  }
  .about-trust {
    padding: 3rem 0 4.5rem;
  }
}