/* ============= 全局 ============= */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Roboto', sans-serif;
  color: #334155;
  line-height: 1.6;
  padding-top: 80px;
  background-color: #f8fafc;
}

h1, h2, h3, h4 {
  font-family: 'Poppins', sans-serif;
  font-weight: 600;
  color: #1e293b;
  margin-bottom: 16px;
}

p, ul {
  margin-bottom: 16px;
}

.container {
  width: 100%;
  max-width: 1200px;
  padding-left: 1rem;
  padding-right: 1rem;
  margin: 0 auto;
}

/* ============= 导航栏（简化版）============= */
.case-navbar {
  padding: 20px 0;
  background-color: rgba(255, 255, 255, 0.95);
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 1000;
}

/* ============= 内容模块通用样式 ============= */
.content-block {
  display: flex;
  gap: 40px;
  align-items: center;
  margin: 60px 0;
}

.content-block.reverse {
  flex-direction: row-reverse;
}

.text-content, .media-content {
  flex: 1;
  min-width: 0;
}

.text-content h3 {
  display: flex;
  align-items: center;
  gap: 8px;
}

.media-content img,
.media-content video {
  width: 100%;
  height: auto;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

/* ============= 响应式 ============= */
@media (max-width: 768px) {
  body {
    padding-top: 70px;
  }

  .content-block {
    flex-direction: column !important;
    gap: 24px;
  }

  .case-header {
    padding: 60px 0 30px;
  }
}

/* ============= 案例头部 ============= */
.case-header {
  background: white;
  padding: 80px 0 40px;
  text-align: center;
  border-bottom: 1px solid #e2e8f0;
}