.page-about {
  --page-gap: 48px;
  --page-side-padding: 24px;
  --page-max-width: 1120px;
  --page-accent-height: 3px;
  --page-stat-size: 64px;
}

.page-about__container {
  max-width: var(--page-max-width);
  margin: 0 auto;
  padding: 24px var(--page-side-padding) 64px;
  display: flex;
  flex-direction: column;
  gap: var(--page-gap);
}

/* 面包屑 */
.page-about .breadcrumb {
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 400;
  color: var(--text-gray);
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 0;
  margin: 0;
  line-height: 1;
}

.page-about .breadcrumb__link {
  color: var(--text-gray);
  text-decoration: none;
  transition: color 0.2s;
}

.page-about .breadcrumb__link:hover {
  color: var(--accent-green);
}

.page-about .breadcrumb__sep {
  color: var(--divider-gray);
  user-select: none;
}

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

/* 首屏英雄区 — Z字形起点 */
.page-about__hero {
  display: flex;
  flex-direction: column;
  gap: 32px;
  align-items: flex-start;
}

.page-about__hero-text {
  flex: 1;
}

.page-about__title {
  font-family: var(--font-heading);
  font-size: 42px;
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: 0.02em;
  color: var(--text-white);
  margin: 0 0 12px;
  text-transform: uppercase;
}

.page-about__accent-line {
  width: 60px;
  height: var(--page-accent-height);
  background: var(--primary-red);
  margin-bottom: 16px;
}

.page-about__subtitle {
  font-family: var(--font-body);
  font-size: 18px;
  font-weight: 400;
  line-height: 1.5;
  color: var(--text-gray);
  margin: 0;
  max-width: 480px;
}

.page-about__hero-image {
  width: 100%;
  max-width: 600px;
}

.page-about__img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  transition: transform 0.4s ease;
}

.page-about__img:hover {
  transform: scale(1.02);
}

.page-about__img--phone {
  max-width: 300px;
  margin: 0 auto;
  border-radius: var(--radius-lg);
}

.page-about__img--wide {
  width: 100%;
  max-width: 100%;
}

/* 使命区 — Z字左文右数 */
.page-about__mission {
  display: flex;
  flex-direction: column;
  gap: 32px;
  align-items: flex-start;
}

.page-about__mission-content {
  flex: 1;
}

.page-about__section-title {
  font-family: var(--font-heading);
  font-size: 30px;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: 0.02em;
  color: var(--text-white);
  margin: 0 0 8px;
  text-transform: uppercase;
}

.page-about__text {
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 400;
  line-height: 1.65;
  color: var(--text-gray);
  margin: 0 0 16px;
}

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

.page-about__mission-visual {
  display: flex;
  flex-direction: row;
  gap: 24px;
  flex-wrap: wrap;
}

.page-about__stat-block {
  background: var(--bg-card);
  border: 1px solid var(--divider-gray);
  border-radius: var(--radius-md);
  padding: 20px 28px;
  min-width: 140px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  box-shadow: var(--shadow-card);
}

.page-about__stat-number {
  font-family: var(--font-heading);
  font-size: var(--page-stat-size);
  font-weight: 700;
  line-height: 1;
  color: var(--primary-red);
  letter-spacing: -0.02em;
}

.page-about__stat-label {
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 400;
  color: var(--text-gray);
  text-align: center;
}

/* 服务范围 — Z字右图左文 */
.page-about__services {
  display: flex;
  flex-direction: column;
  gap: 32px;
  align-items: flex-start;
}

.page-about__services-image {
  width: 100%;
  max-width: 300px;
  margin: 0 auto;
}

.page-about__services-content {
  flex: 1;
}

.page-about__list {
  list-style: none;
  padding: 0;
  margin: 0 0 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-about__list-item {
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 400;
  line-height: 1.5;
  color: var(--text-gray);
  padding-left: 24px;
  position: relative;
}

.page-about__list-item::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 8px;
  width: 8px;
  height: 8px;
  background: var(--accent-green);
  border-radius: 2px;
  transform: rotate(45deg);
}

.page-about__btn {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-white);
  background: var(--primary-red);
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
  box-shadow: 0 4px 12px rgba(230,57,70,0.3);
  border: none;
  cursor: default;
}

.page-about__btn:hover {
  transform: scale(1.05);
  box-shadow: 0 6px 20px rgba(230,57,70,0.4);
}

.page-about__btn--outline {
  background: transparent;
  border: 2px solid var(--primary-red);
  box-shadow: none;
  color: var(--text-white);
}

.page-about__btn--outline:hover {
  background: var(--primary-red);
  box-shadow: 0 4px 12px rgba(230,57,70,0.3);
}

/* 技术特色 — 三卡片网格 */
.page-about__tech {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.page-about__tech-content {
  width: 100%;
}

.page-about__tech-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-top: 24px;
}

.page-about__tech-card {
  background: var(--bg-card);
  border: 1px solid var(--divider-gray);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  box-shadow: var(--shadow-card);
  transition: transform 0.3s ease, border-color 0.3s ease;
}

.page-about__tech-card:hover {
  transform: translateY(-4px);
  border-color: var(--primary-red);
}

.page-about__tech-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.page-about__tech-title {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: 0.02em;
  color: var(--text-white);
  margin: 0;
  text-transform: uppercase;
}

.page-about__tech-desc {
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 400;
  line-height: 1.55;
  color: var(--text-gray);
  margin: 0;
}

/* 覆盖概览 — Z字上文字下图 */
.page-about__coverage {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.page-about__coverage-content {
  width: 100%;
}

.page-about__coverage-image {
  width: 100%;
}

/* CTA区块 */
.page-about__cta {
  width: 100%;
}

.page-about__cta-inner {
  background: var(--bg-card);
  border: 1px solid var(--divider-gray);
  border-radius: var(--radius-md);
  padding: 40px 28px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
}

.page-about__cta-inner::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--page-accent-height);
  background: linear-gradient(90deg, var(--primary-red), var(--accent-green), var(--primary-red));
}

.page-about__cta-title {
  font-family: var(--font-heading);
  font-size: 28px;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: 0.02em;
  color: var(--text-white);
  margin: 0;
  text-transform: uppercase;
}

.page-about__cta-text {
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 400;
  line-height: 1.6;
  color: var(--text-gray);
  margin: 0;
  max-width: 500px;
}

.page-about__cta-links {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
  margin-top: 8px;
}

/* 信任声明 */
.page-about__trust {
  width: 100%;
  padding: 20px 24px;
  background: rgba(45,53,87,0.25);
  border-left: var(--page-accent-height) solid var(--accent-green);
  border-radius: var(--radius-sm);
}

.page-about__trust .trust-statement__text {
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 400;
  line-height: 1.5;
  color: var(--text-gray);
  margin: 0;
}

/* 动画：滚动显现 */
.page-about [data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.page-about [data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* 移动端优先：窄屏已在上面定义，以下为桌面增强 */
@media (min-width: 768px) {
  .page-about {
    --page-gap: 64px;
    --page-side-padding: 40px;
  }

  .page-about__container {
    padding-top: 32px;
    gap: var(--page-gap);
  }

  .page-about__title {
    font-size: 56px;
  }

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

  /* Z字形布局：首屏左文右图 */
  .page-about__hero {
    flex-direction: row;
    align-items: center;
    gap: 48px;
  }

  .page-about__hero-text {
    max-width: 45%;
  }

  .page-about__hero-image {
    max-width: 55%;
  }

  /* 使命区：左文右数据块 */
  .page-about__mission {
    flex-direction: row;
    align-items: center;
    gap: 48px;
  }

  .page-about__mission-content {
    max-width: 55%;
  }

  /* 服务区：右文左图（Z字形交替） */
  .page-about__services {
    flex-direction: row-reverse;
    align-items: center;
    gap: 48px;
  }

  .page-about__services-image {
    max-width: 280px;
    margin: 0;
  }

  .page-about__services-content {
    max-width: 55%;
  }

  .page-about__img--phone {
    margin: 0;
  }

  /* 技术卡片网格三列 */
  .page-about__tech-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }

  /* 覆盖概览：上文字下图 */
  .page-about__coverage {
    flex-direction: column;
    gap: 28px;
  }

  .page-about__coverage-content {
    max-width: 70%;
  }

  .page-about__cta-inner {
    padding: 56px 48px;
  }

  .page-about__cta-title {
    font-size: 34px;
  }

  .page-about__stat-block {
    min-width: 160px;
    padding: 24px 32px;
  }

  .page-about {
    --page-stat-size: 72px;
  }
}

@media (min-width: 1024px) {
  .page-about__title {
    font-size: 64px;
  }

  .page-about__section-title {
    font-size: 40px;
  }

  .page-about__container {
    padding: 40px 48px 80px;
  }
}

/* 减少动效 */
@media (prefers-reduced-motion: reduce) {
  .page-about [data-reveal] {
    opacity: 1;
    transform: translateY(0);
    transition: none;
  }

  .page-about__img:hover,
  .page-about__tech-card:hover,
  .page-about__btn:hover {
    transform: none;
  }

  .page-about__btn {
    transition: none;
  }

  .page-about__btn:hover {
    transform: none;
    box-shadow: 0 4px 12px rgba(230,57,70,0.3);
  }
}