body {
  font-family: 'Microsoft YaHei', Arial, sans-serif;
  margin: 0;
  padding: 0;
  background: #f7f9fa;
  color: #222;
}
header {
  background: #1976d2;
  color: #fff;
  padding: 20px 0 10px 0;
  text-align: center;
}
nav ul {
  list-style: none;
  padding: 0;
  margin: 10px 0 0 0;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
}
nav ul li {
  margin: 0 15px;
}
nav ul li a {
  color: #fff;
  text-decoration: none;
  font-weight: bold;
  transition: color 0.2s;
}
nav ul li a:hover {
  color: #ffeb3b;
}
section, main {
  max-width: 900px;
  margin: 30px auto;
  background: #fff;
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}
.carousel-container {
  display: flex;
  gap: 20px;
  justify-content: center;
  margin-top: 15px;
}
.carousel-container img {
  width: 220px;
  height: 140px;
  object-fit: cover;
  border-radius: 8px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.08);
}
.gallery {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
}
.gallery img {
  width: 180px;
  height: 120px;
  object-fit: cover;
  border-radius: 8px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.08);
}
.volunteer-list {
  display: flex;
  gap: 30px;
  flex-wrap: wrap;
  justify-content: center;
}
.volunteer {
  background: #f0f4f8;
  border-radius: 8px;
  padding: 18px;
  width: 220px;
  text-align: center;
  box-shadow: 0 1px 4px rgba(0,0,0,0.06);
}
.volunteer img {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  object-fit: cover;
  margin-bottom: 10px;
}
.story-list {
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.story {
  background: #f0f4f8;
  border-radius: 8px;
  padding: 18px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.06);
}
footer {
  text-align: center;
  color: #888;
  padding: 20px 0;
  margin-top: 40px;
  background: #f7f9fa;
  border-top: 1px solid #e0e0e0;
}
@media (max-width: 600px) {
  section, main {
    padding: 10px;
  }
  .carousel-container img, .gallery img {
    width: 100px;
    height: 70px;
  }
  .volunteer {
    width: 100%;
  }
}

/* 统一视频播放器大小 */
.video-list video {
  width: 400px;
  height: 225px;
  object-fit: cover;
  border-radius: 8px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.08);
  margin-bottom: 20px;
}