.page-about {
  --page-bg: var(--winter-white);
  --page-accent: var(--china-red);
  --page-text: var(--slate);
  --page-muted: var(--rock-gray);
  --page-border: var(--clay);
  background: var(--page-bg);
  color: var(--page-text);
  font-family: var(--font-body);
  line-height: 1.6;
  min-height: 100vh;
}

/* 面包屑 */
.page-about .breadcrumb {
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: 1rem 1.5rem 0;
  font-size: var(--font-size-small);
  color: var(--page-muted);
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.page-about .breadcrumb a {
  color: var(--summer-blue);
  text-decoration: none;
  transition: color 0.2s;
}

.page-about .breadcrumb a:hover {
  color: var(--china-red);
}

.page-about .breadcrumb-sep {
  color: var(--page-border);
}

/* 首屏品牌名 */
.page-about .hero-brand {
  position: relative;
  overflow: hidden;
  padding: 3rem 1.5rem 4rem;
  text-align: center;
  background: linear-gradient(135deg, var(--winter-white) 0%, #e8f0e2 100%);
  border-bottom: 4px solid var(--china-red);
}

.page-about .hero-brand-bg {
  position: absolute;
  top: -30%;
  right: -20%;
  width: 60%;
  height: 200%;
  background: radial-gradient(ellipse at center, var(--spring-green) 0%, transparent 70%);
  opacity: 0.08;
  pointer-events: none;
}

.page-about .brand-masthead {
  font-family: var(--font-heading);
  font-size: 3.2rem;
  font-weight: 800;
  color: var(--slate);
  margin: 0 0 0.5rem;
  letter-spacing: 0.06em;
  position: relative;
  display: inline-block;
}

.page-about .brand-masthead::after {
  content: '';
  display: block;
  width: 60%;
  height: 4px;
  background: var(--china-red);
  margin: 0.6rem auto 0;
  border-radius: 2px;
}

.page-about .brand-subtitle {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--spring-green);
  margin: 1rem 0 0.4rem;
}

.page-about .brand-tagline {
  font-size: var(--font-size-small);
  color: var(--page-muted);
  margin: 0;
  letter-spacing: 0.04em;
}

/* 章节通用 */
.page-about .chapter {
  position: relative;
  padding: 3rem 1.5rem;
  border-bottom: 1px solid var(--page-border);
}

.page-about .chapter-label {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 800;
  color: var(--page-border);
  line-height: 1;
  margin-bottom: 1rem;
  opacity: 0.6;
  letter-spacing: 0.05em;
}

.page-about .chapter-inner {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.page-about .chapter-heading {
  font-family: var(--font-heading);
  font-size: var(--font-size-h2);
  font-weight: 700;
  color: var(--slate);
  margin: 0 0 1rem;
  line-height: 1.2;
}

.page-about .chapter-text p {
  margin: 0 0 1.2rem;
  color: var(--page-text);
  font-size: var(--font-size-body);
}

.page-about .chapter-image {
  width: 100%;
}

.page-about .chapter-image img {
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: 4px;
  display: block;
  box-shadow: 0 4px 20px rgba(0,0,0,0.06);
}

/* 季节标签 */
.page-about .season-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1.2rem;
}

.page-about .season-tag {
  display: inline-block;
  padding: 0.3rem 0.9rem;
  border-radius: 20px;
  font-family: var(--font-heading);
  font-size: var(--font-size-small);
  font-weight: 600;
  border: 2px solid transparent;
  transition: transform 0.2s, box-shadow 0.2s;
}

.page-about .season-tag:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.page-about .spring-tag {
  background: #eaf5e0;
  color: var(--spring-green);
  border-color: var(--spring-green);
}

.page-about .summer-tag {
  background: #e3f0fa;
  color: var(--summer-blue);
  border-color: var(--summer-blue);
}

.page-about .autumn-tag {
  background: #fdf0e4;
  color: var(--autumn-orange);
  border-color: var(--autumn-orange);
}

.page-about .winter-tag {
  background: var(--winter-white);
  color: var(--slate);
  border-color: var(--clay);
}

/* 城市标签 */
.page-about .city-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1.2rem 0;
}

.page-about .city-tag {
  display: inline-block;
  padding: 0.35rem 0.8rem;
  font-size: var(--font-size-small);
  font-family: var(--font-heading);
  font-weight: 500;
  color: var(--slate);
  background: var(--winter-white);
  border: 1.5px solid var(--clay);
  border-radius: 4px;
  cursor: default;
  transition: background 0.25s, color 0.25s, border-color 0.25s, transform 0.2s;
}

.page-about .city-tag:hover {
  background: var(--summer-blue);
  color: #fff;
  border-color: var(--summer-blue);
  transform: scale(1.04);
}

.page-about .coverage-note {
  font-size: var(--font-size-small);
  color: var(--page-muted);
  margin: 0.8rem 0 1.2rem;
}

/* 改版亮点列表 */
.page-about .highlight-list {
  list-style: none;
  padding: 0;
  margin: 0 0 1.5rem;
}

.page-about .highlight-list li {
  display: flex;
  gap: 0.8rem;
  padding: 1rem 0;
  border-bottom: 1px dashed var(--page-border);
}

.page-about .highlight-list li:last-child {
  border-bottom: none;
}

.page-about .highlight-icon {
  color: var(--autumn-orange);
  font-size: 1.2rem;
  flex-shrink: 0;
  margin-top: 0.2rem;
}

.page-about .highlight-list strong {
  display: block;
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--slate);
  margin-bottom: 0.2rem;
}

.page-about .highlight-list p {
  margin: 0;
  font-size: var(--font-size-small);
  color: var(--page-muted);
}

/* 评价引用 */
.page-about .chapter-quote {
  margin-top: 1rem;
  padding: 1.5rem;
  background: var(--winter-white);
  border-left: 4px solid var(--china-red);
  border-radius: 0 4px 4px 0;
}

.page-about .chapter-quote blockquote {
  margin: 0;
  padding: 0;
}

.page-about .chapter-quote blockquote p {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--slate);
  margin: 0 0 0.5rem;
  line-height: 1.3;
}

.page-about .chapter-quote blockquote footer {
  font-size: var(--font-size-small);
  color: var(--page-muted);
  font-style: normal;
}

/* 按钮 */
.page-about .btn {
  display: inline-block;
  padding: 0.7rem 1.8rem;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: var(--font-size-small);
  color: #fff;
  background: var(--slate);
  border: none;
  border-radius: 4px;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.25s, transform 0.2s;
  line-height: 1.4;
}

.page-about .btn:hover {
  background: var(--china-red);
  transform: translateY(-2px);
}

.page-about .btn-small {
  padding: 0.5rem 1.2rem;
  font-size: 0.8rem;
}

/* 信任声明 */
.page-about .trust-statement {
  padding: 2rem 1.5rem;
  background: var(--slate);
  color: var(--winter-white);
  text-align: center;
  font-size: var(--font-size-small);
}

.page-about .trust-statement p {
  margin: 0;
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
  opacity: 0.9;
}

/* 章节季节色彩变体 */
.page-about .chapter-spring {
  border-left: 6px solid var(--spring-green);
}

.page-about .chapter-summer {
  border-left: 6px solid var(--summer-blue);
}

.page-about .chapter-autumn {
  border-left: 6px solid var(--autumn-orange);
}

.page-about .chapter-winter {
  border-left: 6px solid var(--china-red);
  background: #fafaf8;
}

/* 共享工具类 */
.page-about .container {
  max-width: var(--content-max-width);
  margin-left: auto;
  margin-right: auto;
}

.page-about .img-fluid {
  max-width: 100%;
  height: auto;
}

/* 桌面端媒体查询 */
@media (min-width: 992px) {
  .page-about .breadcrumb {
    padding: 1.2rem 2rem 0;
  }

  .page-about .hero-brand {
    padding: 5rem 2rem 6rem;
  }

  .page-about .brand-masthead {
    font-size: 4.5rem;
  }

  .page-about .brand-masthead::after {
    width: 40%;
  }

  .page-about .brand-subtitle {
    font-size: 1.8rem;
  }

  .page-about .chapter {
    padding: 4rem 2rem;
    border-left-width: 8px;
  }

  .page-about .chapter-label {
    position: absolute;
    left: 1.2rem;
    top: 3rem;
    font-size: 1.6rem;
    writing-mode: vertical-rl;
    text-orientation: mixed;
    margin-bottom: 0;
    opacity: 0.35;
    color: var(--slate);
    letter-spacing: 0.3em;
  }

  .page-about .chapter-inner {
    flex-direction: row;
    align-items: center;
    gap: 3rem;
  }

  .page-about .chapter-inner-reverse {
    flex-direction: row-reverse;
  }

  .page-about .chapter-text {
    flex: 1 1 50%;
  }

  .page-about .chapter-image {
    flex: 1 1 45%;
  }

  .page-about .chapter-heading {
    font-size: var(--font-size-h1);
    margin-bottom: 1.2rem;
  }

  .page-about .chapter-quote {
    flex: 1 1 40%;
    margin-top: 0;
  }

  .page-about .city-grid {
    gap: 0.6rem;
  }

  .page-about .city-tag {
    padding: 0.4rem 1rem;
    font-size: 0.9rem;
  }

  .page-about .season-tag {
    padding: 0.4rem 1.2rem;
  }

  .page-about .highlight-list li {
    padding: 1.2rem 0;
  }

  .page-about .trust-statement {
    padding: 3rem 2rem;
    font-size: var(--font-size-body);
  }
}

/* 窄屏微调 */
@media (max-width: 420px) {
  .page-about .brand-masthead {
    font-size: 2.4rem;
  }

  .page-about .brand-subtitle {
    font-size: 1.1rem;
  }

  .page-about .chapter {
    padding: 2rem 1rem;
  }

  .page-about .chapter-label {
    font-size: 1.6rem;
  }

  .page-about .chapter-heading {
    font-size: 1.6rem;
  }

  .page-about .city-tag {
    font-size: 0.75rem;
    padding: 0.25rem 0.6rem;
  }

  .page-about .season-tag {
    font-size: 0.75rem;
    padding: 0.2rem 0.7rem;
  }
}