body {
  margin: 0;
  font-family: '微软雅黑', Arial, sans-serif;

  background-attachment: fixed;
}

.home-main {
  display: flex;
  height: 400px;
  margin: 40px auto 0 auto;
  max-width: 900px;
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}
.home-left, .home-right {
  flex: 1;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.home-connector {
  width: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.placeholder {
  color: #888;
  font-size: 22px;
  text-align: center;
  border: 2px dashed #bbb;
  border-radius: 8px;
  padding: 30px 10px;
  background: #f0f0f0;
}
.home-intro-link {
  text-align: center;
  margin: 30px 0;
}
.china-map-placeholder {
  margin: 40px auto;
  max-width: 600px;
  min-height: 400px;
  background: #e6e6e6;
  border-radius: 10px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}
.map-svg {
  font-size: 20px;
  color: #888;
}
.map-tooltip {
  position: absolute;
  top: 10px;
  left: 10px;
  background: #fffbe6;
  color: #333;
  border: 1px solid #e0c97f;
  border-radius: 4px;
  padding: 6px 12px;
  display: none;
  z-index: 10;
}
.fields-list {
  margin: 30px 0 20px 0;
  text-align: center;
}
.field-btn {
  margin: 0 10px;
  padding: 10px 24px;
  font-size: 16px;
  border: none;
  border-radius: 6px;
  background: #2d3e50;
  color: #fff;
  cursor: pointer;
}
.field-btn:hover {
  background: #1a232c;
}
.cards-container {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  justify-content: center;
}
.card {
  width: 220px;
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.07);
  padding: 16px;
  text-align: center;
  cursor: pointer;
}
.card-img {
  width: 100%;
  height: 120px;
  background: #e0e0e0;
  border-radius: 6px;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #aaa;
  font-size: 16px;
}
.forum-main {
  width: 80%;
  align-items: center;
  top: 10rem;
  left:10%;
  right: 10%;
  position: absolute;
  background: rgba(255,255,255,0.82);
  border-radius: 10px;
  padding: 30px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
  transition: all 0.4s ease-in-out;
}
.forum-main:hover {
  transform: scale(1.02);
}
.forum-ask {
  display: flex;
  gap: 10px;
  margin-bottom: 30px;
}
.forum-ask input {
  flex: 1;
  padding: 8px 12px;
  font-size: 16px;
  border-radius: 4px;
  border: 1px solid #ccc;
}
.forum-ask button {
  padding: 8px 18px;
  font-size: 16px;
  border-radius: 4px;
  border: none;
  background: #2d3e50;
  color: #fff;
  cursor: pointer;
}
.hint{
  color: #888;
  font-size: 14px;
  margin-bottom: 10px;
  text-align: right;
}
.forum-list {
  margin-top: 10px;
}
.forum-question {
  font-weight: bold;
  margin-bottom: 6px;
}
.forum-answer {
  margin-left: 20px;
  color: #555;
  margin-bottom: 18px;
}
.about-main, .intro-main, .team-main, .project-main {
  max-width: 800px;
  margin: 40px auto;
  background: #fff;
  border-radius: 10px;
  padding: 30px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}
.about-section, .intro-section {
  margin-bottom: 30px;
  font-size: 20px;
  color: #666;
}
.team-img, .project-poster, .project-culture-img {
  width: 100%;
  height: 180px;
  background: #e0e0e0;
  border-radius: 8px;
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #aaa;
  font-size: 18px;
}
.team-desc, .project-desc, .project-culture {
  margin-bottom: 18px;
  color: #555;
  font-size: 18px;
}