.page-about {
  --about-hero-gap: 0px;
  --about-block-min-height: 320px;
  --about-font-scale: 1;
  display: block;
  max-width: 100%;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
  font-family: var(--font-base);
  color: var(--color-neutral-dark);
  background-color: var(--color-background);
}

/* ===== 首屏：错位色块 ===== */
.page-about .about-hero {
  display: flex;
  flex-direction: column;
  gap: var(--about-hero-gap);
  margin: var(--spacing-lg) 0 var(--spacing-xl);
  min-height: var(--about-block-min-height);
}

.page-about .hero-block {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: var(--spacing-xl) var(--spacing-lg);
  position: relative;
  overflow: hidden;
}

.page-about .hero-block--primary {
  background-color: var(--color-primary);
  color: var(--color-surface);
}

.page-about .hero-block--accent {
  background-color: var(--color-accent);
  color: var(--color-neutral-dark);
}

.page-about .hero-label {
  font-weight: 300;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: var(--spacing-sm);
  opacity: 0.8;
}

.page-about .hero-title {
  font-weight: 700;
  font-size: calc(2.8rem * var(--about-font-scale));
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin: 0 0 var(--spacing-sm);
}

.page-about .hero-subtitle {
  font-weight: 400;
  font-size: 1rem;
  line-height: 1.6;
  max-width: 24em;
  opacity: 0.9;
}

.page-about .hero-keywords {
  font-weight: 300;
  font-size: 0.9rem;
  line-height: 1.5;
  margin: 0 0 var(--spacing-md);
  max-width: 28em;
}

.page-about .hero-figure {
  width: 100%;
  max-width: 240px;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: contain;
  margin-top: var(--spacing-sm);
  align-self: flex-start;
}

/* ===== 品牌使命 ===== */
.page-about .about-mission {
  margin: 0 auto var(--spacing-xl);
  max-width: 720px;
}

.page-about .about-mission__inner {
  padding: var(--spacing-lg) var(--spacing-md);
  border-left: 4px solid var(--color-accent);
  background-color: var(--color-surface);
  box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}

.page-about .section-label {
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: -0.01em;
  color: var(--color-primary);
  margin: 0 0 var(--spacing-md);
  text-transform: uppercase;
}

.page-about .mission-text {
  font-weight: 400;
  font-size: 1rem;
  line-height: 1.7;
  margin: 0;
}

/* ===== 服务内容与更新理念：可折叠段落 ===== */
.page-about .about-services,
.page-about .about-philosophy {
  margin: 0 auto var(--spacing-xl);
  max-width: 720px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-neutral-light);
  box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}

.page-about .about-services__header,
.page-about .about-philosophy__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-md) var(--spacing-md) 0;
}

.page-about .expand-toggle {
  background: none;
  border: 1px solid var(--color-primary);
  color: var(--color-primary);
  font-family: var(--font-base);
  font-size: 0.8rem;
  font-weight: 500;
  padding: 0.3rem 0.8rem;
  border-radius: 20px;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}

.page-about .expand-toggle:hover,
.page-about .expand-toggle:focus-visible {
  background: var(--color-primary);
  color: var(--color-surface);
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.page-about .about-services__content,
.page-about .about-philosophy__content {
  padding: var(--spacing-md) var(--spacing-md) var(--spacing-lg);
}

/* 折叠状态 —— 渐进增强，JS未加载时始终展开 */
.page-about .about-services__content,
.page-about .about-philosophy__content {
  display: block;
}

/* 服务项排版 */
.page-about .service-item {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
  align-items: flex-start;
}

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

.page-about .service-icon {
  width: 80px;
  max-width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: contain;
  border: 1px solid var(--color-neutral-light);
  border-radius: 12px;
  padding: var(--spacing-xs);
  background: var(--color-background);
}

.page-about .service-text {
  flex: 1;
}

.page-about .service-title {
  font-weight: 700;
  font-size: 1.1rem;
  margin: 0 0 var(--spacing-xs);
  color: var(--color-primary-dark);
}

.page-about .service-desc {
  font-weight: 400;
  font-size: 0.95rem;
  line-height: 1.6;
  margin: 0;
}

.page-about .inline-link {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color 0.2s;
}

.page-about .inline-link:hover {
  color: var(--color-accent);
}

/* 更新理念内容 */
.page-about .philosophy-text {
  font-weight: 400;
  font-size: 1rem;
  line-height: 1.7;
  margin: 0 0 var(--spacing-lg);
}

.page-about .philosophy-visual {
  margin-top: var(--spacing-md);
}

.page-about .philosophy-stripe {
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 8 / 1;
  object-fit: cover;
  border-radius: 6px;
  opacity: 0.7;
}

/* ===== 移动端优先 —— 窄屏适配 ===== */
@media (max-width: 599px) {
  .page-about {
    padding: 0 var(--spacing-sm);
  }

  .page-about .hero-block {
    padding: var(--spacing-lg) var(--spacing-md);
  }

  .page-about .hero-title {
    font-size: 2rem;
  }

  .page-about .hero-figure {
    max-width: 160px;
  }

  .page-about .service-item {
    flex-direction: row;
    flex-wrap: wrap;
  }

  .page-about .service-icon {
    width: 60px;
  }

  .page-about .about-services__header,
  .page-about .about-philosophy__header {
    flex-wrap: wrap;
    gap: var(--spacing-sm);
  }

  .page-about .expand-toggle {
    font-size: 0.75rem;
    padding: 0.2rem 0.6rem;
  }
}

/* ===== 桌面端 ===== */
@media (min-width: 600px) {
  .page-about {
    padding: 0 var(--spacing-lg);
  }

  .page-about .about-hero {
    flex-direction: row;
    gap: 0;
    margin: var(--spacing-xl) auto var(--spacing-xl);
    max-width: 960px;
    position: relative;
  }

  .page-about .hero-block {
    flex: 1;
    min-height: 340px;
    padding: var(--spacing-xl) var(--spacing-xl);
  }

  .page-about .hero-block--primary {
    clip-path: polygon(0 0, 100% 0, 85% 100%, 0 100%);
    z-index: 1;
    padding-right: calc(var(--spacing-xl) + 32px);
  }

  .page-about .hero-block--accent {
    clip-path: polygon(15% 0, 100% 0, 100% 100%, 0 100%);
    margin-left: -10%;
    padding-left: calc(var(--spacing-xl) + 32px);
  }

  .page-about .hero-title {
    font-size: 3rem;
  }

  .page-about .hero-figure {
    max-width: 200px;
    margin-top: var(--spacing-md);
    align-self: center;
  }

  .page-about .about-mission,
  .page-about .about-services,
  .page-about .about-philosophy {
    max-width: 800px;
  }

  .page-about .about-mission__inner {
    padding: var(--spacing-xl) var(--spacing-lg);
  }

  .page-about .service-item {
    flex-direction: row;
    align-items: center;
    gap: var(--spacing-lg);
  }

  .page-about .service-icon {
    width: 100px;
    flex-shrink: 0;
  }

  .page-about .service-title {
    font-size: 1.2rem;
  }

  .page-about .about-services__header,
  .page-about .about-philosophy__header {
    padding: var(--spacing-lg) var(--spacing-lg) 0;
  }

  .page-about .about-services__content,
  .page-about .about-philosophy__content {
    padding: var(--spacing-md) var(--spacing-lg) var(--spacing-xl);
  }
}

/* 大桌面 */
@media (min-width: 1024px) {
  .page-about .about-hero {
    max-width: 1100px;
  }

  .page-about .hero-title {
    font-size: 3.6rem;
  }

  .page-about .hero-block {
    min-height: 380px;
  }
}