.case-page {
  background: #f6f8fb;
}

/* 顶部横幅 */
.case-hero {
  position: relative;
  min-height: 620px;
  overflow: hidden;
}

.case-hero__img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
  z-index: 0;
}

.case-hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(13, 40, 71, 0.28) 0%, rgba(13, 40, 71, 0.18) 100%);
  z-index: 1;
}

.case-hero__inner {
  position: relative;
  z-index: 2;
  max-width: 1200px;
  margin: 0 auto;
  padding: 220px 16px 180px;
  text-align: center;
  color: #ffffff;
}

.case-hero__title {
  margin: 0;
  font-size: 44px;
  font-weight: 700;
  letter-spacing: 2px;
  line-height: 1.2;
}

.case-hero__subtitle {
  margin: 12px 0 0;
  font-size: 14px;
  letter-spacing: 2px;
  opacity: 0.92;
}

/* 内容区 */
.case-content {
  position: relative;
  padding: 56px 0 80px;
  background-image: url("../images/background-about.jpg");
  background-position: top center;
  background-size: 100% auto;
  background-repeat: repeat-y;
}

.case-content::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(246, 248, 251, 0.72);
  pointer-events: none;
}

.case-content__inner {
  position: relative;
  z-index: 1;
  max-width: 1040px;
  margin: 0 auto;
  padding: 0 16px;
}

/* 面包屑 */
.case-hero__crumbs {
  margin: 0 0 16px;
  font-size: 14px;
  line-height: 1.5;
  color: #5b6678;
}

.case-hero__crumbs a {
  color: #2c3a4b;
  text-decoration: none;
}

.case-hero__crumbs a:hover {
  text-decoration: underline;
}

.case-hero__crumbs .sep {
  margin: 0 8px;
  opacity: 0.7;
}

/* 内容主卡片 */
.case-block {
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(226, 232, 240, 0.9);
  border-radius: 10px;
  box-shadow: 0 10px 28px rgba(16, 24, 40, 0.1);
  padding: 28px 32px 34px;
}

.case-block__section {
  padding: 28px 0;
}

.case-block__section + .case-block__section {
  border-top: 1px solid #e6ebf2;
}

/* 标题区 */
.case-block__title {
  padding-top: 8px;
  padding-bottom: 24px;
  text-align: center;
}

.case-block__title h2 {
  margin: 0;
  font-size: 30px;
  font-weight: 700;
  line-height: 1.25;
  color: #111827;
  letter-spacing: 1px;
}

.case-block__title p {
  margin: 8px 0 0;
  font-size: 12px;
  line-height: 1.4;
  color: #8a95a6;
  letter-spacing: 1.5px;
}

/* 图片区 */
.case-block__gallery {
  padding-top: 32px;
  padding-bottom: 32px;
}

.case-block__image {
  overflow: hidden;
  border-radius: 8px;
  background: #eef2f600;
  display: flex;
  justify-content: center;
  align-items: center;
}

.case-block__image img {
  display: block;
  max-width: 100%;
  height: auto;
}

/* 正文区 */
.case-card-1 {
  padding-top: 32px;
}

.case-card-1 p {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 2;
  color: #2f3b4b;
  text-align: justify;
}

.case-card-1 p:last-child {
  margin-bottom: 0;
}

.case-post-nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  padding-top: 28px;
}

.case-post-nav__item {
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-height: 92px;
  padding: 18px 20px;
  border-radius: 8px;
  text-decoration: none;
  transition: all 0.2s ease;
}

.case-post-nav__item:hover {
  border-color: #c8d6e5;
  background: #ffffff;
  box-shadow: 0 8px 20px rgba(16, 24, 40, 0.06);
}

.case-post-nav__label {
  font-size: 12px;
  line-height: 1.4;
  color: #8a95a6;
}

.case-post-nav__title {
  font-size: 15px;
  line-height: 1.7;
  color: #1f2937;
}

.case-post-nav__item--next {
  text-align: right;
}

/* 移动端 */
@media (max-width: 768px) {
  .case-hero {
    min-height: 420px;
  }

  .case-hero__inner {
    padding: 148px 16px 110px;
  }

  .case-hero__title {
    font-size: 28px;
  }

  .case-hero__subtitle {
    font-size: 12px;
  }

  .case-content {
    padding: 36px 0 52px;
  }

  .case-content__inner {
    padding: 0 12px;
  }

  .case-block {
    padding: 20px 16px 24px;
    border-radius: 8px;
  }

  .case-block__section {
    padding: 20px 0;
  }

  .case-block__title h2 {
    font-size: 24px;
  }

  .case-card-1 p {
    font-size: 14px;
    line-height: 1.9;
  }

    .case-post-nav {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .case-post-nav__item--next {
    text-align: left;
  }
}