/* ===== page-about 专属样式 ===== */
.page-about {
  --about-accent-bg: #F4A26115;
  --about-card-shadow: 0 4px 14px rgba(0,0,0,0.06);
  --about-radius-sm: 4px;
  --about-radius-md: 8px;
  font-family: var(--font-body, 'PingFang SC', 'Microsoft YaHei', sans-serif);
  color: var(--neutral-dark, #2B2D42);
  line-height: 1.6;
}

/* 面包屑 */
.page-about-breadcrumb {
  max-width: var(--max-width, 1200px);
  margin: 0 auto;
  padding: 16px 20px 0;
  font-size: 14px;
  color: var(--neutral-dark, #2B2D42);
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.page-about-breadcrumb a {
  color: var(--primary, #E63946);
  text-decoration: none;
  transition: opacity var(--transition, 0.25s);
}
.page-about-breadcrumb a:hover {
  opacity: 0.75;
}
.page-about-breadcrumb-sep {
  color: var(--accent, #F4A261);
  font-weight: 700;
}
.page-about-breadcrumb [aria-current="page"] {
  color: var(--neutral-dark, #2B2D42);
  font-weight: 600;
}

/* 品牌导语区 ─ 宽章，深蓝背景 */
.page-about-intro {
  background: var(--secondary, #1D3557);
  padding: 60px 20px 48px;
  margin: 0 0 0;
  position: relative;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 24px), 0 100%);
}
.page-about-intro .container {
  max-width: var(--max-width, 1200px);
  margin: 0 auto;
}
.page-about-intro-title {
  font-family: var(--font-heading, 'Segoe UI', 'Arial Black', sans-serif);
  font-size: 40px;
  font-weight: 800;
  color: var(--text-light, #FFFFFF);
  margin: 0 0 12px;
  line-height: 1.15;
  letter-spacing: -0.02em;
}
.page-about-intro-sub {
  font-size: 20px;
  font-weight: 600;
  color: var(--accent, #F4A261);
  margin: 0 0 16px;
  line-height: 1.4;
}
.page-about-intro-desc {
  font-size: 16px;
  color: var(--text-light, #FFFFFF);
  opacity: 0.88;
  max-width: 640px;
  margin: 0 0 20px;
  line-height: 1.7;
}
.page-about-intro-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.page-about-intro-meta .tag {
  background: var(--accent, #F4A261);
  color: var(--text-dark, #1D3557);
  font-size: 13px;
  font-weight: 600;
  padding: 4px 14px;
  border-radius: var(--radius, 4px);
  display: inline-block;
}

/* 通用章节标题 */
.page-about-section-title {
  font-family: var(--font-heading, 'Segoe UI', 'Arial Black', sans-serif);
  font-size: 30px;
  font-weight: 800;
  color: var(--secondary, #1D3557);
  margin: 0 0 8px;
  line-height: 1.2;
}
.page-about-section-ledge {
  font-size: 16px;
  color: var(--neutral-dark, #2B2D42);
  opacity: 0.7;
  margin: 0 0 32px;
  font-weight: 400;
}

/* 三步流程区 ─ 窄章 */
.page-about-steps {
  padding: 52px 20px 56px;
  background: var(--neutral-light, #F1FAEE);
}
.page-about-steps .container {
  max-width: 960px;
  margin: 0 auto;
}
.page-about-steps-layout {
  display: flex;
  flex-direction: column;
  gap: 32px;
}
.page-about-steps-cards {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
/* 步骤卡片 ─ 可展开 */
.page-about-step-card {
  background: var(--text-light, #FFFFFF);
  border-radius: var(--about-radius-md, 8px);
  box-shadow: var(--about-card-shadow);
  border-left: 4px solid var(--primary, #E63946);
  overflow: hidden;
  transition: box-shadow var(--transition, 0.25s);
}
.page-about-step-card[open] {
  box-shadow: 0 6px 20px rgba(0,0,0,0.10);
}
.page-about-step-summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  cursor: pointer;
  list-style: none;
  user-select: none;
}
.page-about-step-summary::-webkit-details-marker {
  display: none;
}
.page-about-step-summary::marker {
  display: none;
  content: '';
}
.page-about-step-num {
  font-family: var(--font-mono, 'Consolas', 'Courier New', monospace);
  font-size: 28px;
  font-weight: 700;
  color: var(--primary, #E63946);
  min-width: 42px;
  line-height: 1;
}
.page-about-step-label {
  font-family: var(--font-heading, 'Segoe UI', 'Arial Black', sans-serif);
  font-size: 18px;
  font-weight: 700;
  color: var(--secondary, #1D3557);
  min-width: 80px;
}
.page-about-step-brief {
  font-size: 14px;
  color: var(--neutral-dark, #2B2D42);
  opacity: 0.7;
  flex: 1;
}
.page-about-step-detail {
  padding: 4px 20px 20px;
  font-size: 15px;
  color: var(--neutral-dark, #2B2D42);
  line-height: 1.7;
  border-top: 1px dashed var(--accent, #F4A261);
  margin: 0 16px 0 16px;
}
.page-about-step-detail p {
  margin: 12px 0;
}
.page-about-step-detail .btn {
  display: inline-block;
  margin-top: 8px;
  font-size: 14px;
  padding: 8px 20px;
  background: var(--primary, #E63946);
  color: var(--text-light, #FFFFFF);
  border-radius: var(--radius, 4px);
  text-decoration: none;
  font-weight: 600;
  transition: opacity var(--transition, 0.25s);
}
.page-about-step-detail .btn:hover {
  opacity: 0.85;
}
/* 步骤区图片 */
.page-about-steps-figure {
  margin: 0;
  text-align: center;
}
.page-about-steps-img {
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--about-radius-md, 8px);
  box-shadow: var(--about-card-shadow);
  display: block;
  width: 100%;
}
.page-about-steps-caption {
  font-size: 13px;
  color: var(--neutral-dark, #2B2D42);
  opacity: 0.65;
  margin-top: 8px;
  font-style: italic;
}

/* 为何选择区 ─ 宽章，暖黄点缀 */
.page-about-why {
  padding: 52px 20px 56px;
  background: var(--about-accent-bg);
  position: relative;
}
.page-about-why::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 6px;
  background: linear-gradient(90deg, var(--accent, #F4A261) 0%, var(--primary, #E63946) 100%);
}
.page-about-why .container {
  max-width: var(--max-width, 1200px);
  margin: 0 auto;
}
.page-about-why-title {
  margin-bottom: 28px;
}
.page-about-why-layout {
  display: flex;
  flex-direction: column;
  gap: 32px;
}
.page-about-why-text {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.page-about-why-card {
  background: var(--text-light, #FFFFFF);
  padding: 24px 24px 28px;
  border-radius: var(--about-radius-md, 8px);
  box-shadow: var(--about-card-shadow);
  border: 2px dashed transparent;
  transition: border-color var(--transition, 0.25s), transform var(--transition, 0.25s);
}
.page-about-why-card:hover {
  border-color: var(--accent, #F4A261);
  transform: translateY(-2px);
}
.page-about-why-card.chamfer {
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%);
}
.page-about-why-icon {
  font-size: 28px;
  display: block;
  margin-bottom: 8px;
  line-height: 1;
}
.page-about-why-heading {
  font-family: var(--font-heading, 'Segoe UI', 'Arial Black', sans-serif);
  font-size: 20px;
  font-weight: 700;
  color: var(--secondary, #1D3557);
  margin: 0 0 8px;
}
.page-about-why-card p {
  font-size: 15px;
  line-height: 1.7;
  color: var(--neutral-dark, #2B2D42);
  margin: 0 0 12px;
}
.page-about-why-card .btn {
  display: inline-block;
  font-size: 14px;
  padding: 8px 20px;
  background: var(--primary, #E63946);
  color: var(--text-light, #FFFFFF);
  border-radius: var(--radius, 4px);
  text-decoration: none;
  font-weight: 600;
  transition: opacity var(--transition, 0.25s);
}
.page-about-why-card .btn:hover {
  opacity: 0.85;
}
.page-about-why-figure {
  margin: 0;
  text-align: center;
}
.page-about-why-img {
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--about-radius-md, 8px);
  box-shadow: var(--about-card-shadow);
  display: block;
  width: 100%;
}
.page-about-why-caption {
  font-size: 13px;
  color: var(--neutral-dark, #2B2D42);
  opacity: 0.65;
  margin-top: 8px;
  font-style: italic;
}

/* 理念区 ─ 窄章 */
.page-about-philosophy {
  padding: 52px 20px 56px;
  background: var(--neutral-light, #F1FAEE);
}
.page-about-philosophy .container {
  max-width: 960px;
  margin: 0 auto;
}
.page-about-philosophy-layout {
  display: flex;
  flex-direction: column;
  gap: 32px;
}
.page-about-philosophy-figure {
  margin: 0;
  text-align: center;
}
.page-about-philosophy-img {
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--about-radius-md, 8px);
  box-shadow: var(--about-card-shadow);
  display: block;
  width: 100%;
}
.page-about-philosophy-caption {
  font-size: 13px;
  color: var(--neutral-dark, #2B2D42);
  opacity: 0.65;
  margin-top: 8px;
  font-style: italic;
}
.page-about-philosophy-text {
  text-align: left;
}
.page-about-philosophy-statement {
  font-family: var(--font-heading, 'Segoe UI', 'Arial Black', sans-serif);
  font-size: 26px;
  font-weight: 800;
  color: var(--primary, #E63946);
  margin: 0 0 20px;
  line-height: 1.2;
  letter-spacing: -0.01em;
}
.page-about-philosophy-desc {
  font-size: 16px;
  line-height: 1.8;
  color: var(--neutral-dark, #2B2D42);
  margin: 0 0 16px;
}
.page-about-philosophy-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}
.page-about-philosophy-links .btn {
  display: inline-block;
  font-size: 15px;
  padding: 10px 24px;
  background: var(--primary, #E63946);
  color: var(--text-light, #FFFFFF);
  border-radius: var(--radius, 4px);
  text-decoration: none;
  font-weight: 600;
  transition: opacity var(--transition, 0.25s);
}
.page-about-philosophy-links .btn:hover {
  opacity: 0.85;
}

/* 底部承诺条 */
.page-about-commitment {
  background: var(--secondary, #1D3557);
  padding: 28px 20px;
  clip-path: polygon(0 0, 24px 0, 100% 0, 100% 100%, 0 100%);
}
.page-about-commitment .container {
  max-width: var(--max-width, 1200px);
  margin: 0 auto;
  text-align: center;
}
.page-about-commitment-text {
  font-size: 16px;
  font-weight: 600;
  color: var(--accent, #F4A261);
  margin: 0;
  line-height: 1.6;
}

/* ===== 桌面端媒体查询 ===== */
@media (min-width: 768px) {
  .page-about-intro {
    padding: 80px 32px 64px;
  }
  .page-about-intro-title {
    font-size: 52px;
  }
  .page-about-intro-sub {
    font-size: 24px;
  }
  .page-about-intro-desc {
    font-size: 18px;
  }

  .page-about-section-title {
    font-size: 36px;
  }

  .page-about-steps {
    padding: 64px 32px 68px;
  }
  .page-about-steps-layout {
    flex-direction: row;
    align-items: flex-start;
    gap: 40px;
  }
  .page-about-steps-cards {
    flex: 1.2;
  }
  .page-about-steps-figure {
    flex: 0.8;
    margin-top: 8px;
  }
  .page-about-steps-img {
    width: 400px;
    height: 300px;
  }

  .page-about-why {
    padding: 64px 32px 68px;
  }
  .page-about-why-layout {
    flex-direction: row;
    align-items: flex-start;
    gap: 48px;
  }
  .page-about-why-text {
    flex: 1;
  }
  .page-about-why-figure {
    flex: 1;
    margin-top: 4px;
  }
  .page-about-why-img {
    width: 600px;
    height: 300px;
  }

  .page-about-philosophy {
    padding: 64px 32px 68px;
  }
  .page-about-philosophy-layout {
    flex-direction: row;
    align-items: center;
    gap: 48px;
  }
  .page-about-philosophy-figure {
    flex: 1;
  }
  .page-about-philosophy-img {
    width: 800px;
    height: 400px;
  }
  .page-about-philosophy-text {
    flex: 1;
  }
  .page-about-philosophy-statement {
    font-size: 32px;
  }

  .page-about-commitment {
    padding: 32px 32px;
  }
  .page-about-commitment-text {
    font-size: 18px;
  }
}

@media (min-width: 1024px) {
  .page-about-intro {
    padding: 100px 40px 72px;
  }
  .page-about-intro-title {
    font-size: 60px;
  }
  .page-about-step-summary {
    padding: 18px 24px;
  }
  .page-about-step-num {
    font-size: 32px;
  }
  .page-about-step-label {
    font-size: 20px;
  }
  .page-about-why-card {
    padding: 28px 28px 32px;
  }
}