/* CSS for Research Page */
.research-body {
  font-family: 'Noto Sans', Arial, Helvetica, sans-serif; /* Apply font set to Noto Sans */
  line-height: 1.6;
  color: #444;
  margin: 0;
  padding: 0;
  background-color: #efefef;
}
.research-container {
  max-width: 1500px;
  margin: 0 auto;
  padding: 0.5rem;
  margin-top: 0.5rem;
  padding-left: 0.5rem;
  padding-right: 0.5rem;
}
.research-header {
  background-color: #535361;
  color: white;
  padding: 1rem 0;
  text-align: center;
}
.research-header h1 {
  margin: 0;
  font-size: 0.9rem;
}
.research-header p {
  margin: 0.5rem 0 0;
  font-size: 1rem;
}
.research-tabs {
  font-size: 1rem;
  background-color: transparent;
  padding: 0.3rem;
  margin-bottom: 0.2rem;
  margin-top: 1rem;
  margin-left: 0.5rem;
  margin-right: 0.5rem;
}

.research-tabs ul {
  list-style: none;
  padding: 0rem !important;
  margin: 0rem !important;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}

@media (min-width: 769px) {
  .research-tabs {
    padding: 0;
    margin-bottom: 0;
    margin-left:0.5rem;
    margin-right: 0.5rem;
  }
  .research-tabs ul {
  justify-content: left;
  gap: 1rem;
}
}

.research-tabs ul li {
  margin: 0;
}
.research-tabs ul li button {
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  font-weight: 600;
  font-size: 1.2rem;
  color: #868686;
  border-radius: 0;
  transition: all 0.3s ease;
  display: inline-block;
  width: auto;
  white-space: nowrap;
}
.research-tabs ul li button:hover {
  color: #454545;
  font-size: 1.3rem;
  transform: translateY(-2px);
}
.research-tabs ul li button:active {
  font-size: 1.25rem;
  transition: transform 0.3s ease;
}

.research-tabs ul li button.research-active {
  color: #23252D;
  font-weight: 800;
  font-size: 1.3rem;
  transform: translateY(-3px);
}
@media (max-width: 768px) {
  .research-tabs ul li {
    margin: 0;
    padding: 0;
  }
  .research-tabs ul li button {
    background: none;
    border: none;
    padding-top: 0.5rem;
    padding-bottom: 0.5rem;
    padding-left: 0.5rem;
    padding-right: 0.5rem;
    margin:0rem;
    cursor: pointer;
    font-weight: 600;
    font-size: 1rem;
    color: #23252D;
    border-radius: 0.5rem;
    transition: all 0.3s ease;
    display: block;
    width: 100%;
    text-align: center;
  }
  .research-tabs ul li button:hover {
    background-color: #cad7db;
    font-size: 1rem;
    transform: translateY(0px);
  }
  .research-tabs ul li button:active {
    font-size: 1rem;
    transition: transform 0.3s ease;
    }
  .research-tabs ul li button.research-active {
    background-color: #23252D;
    color: white;
    font-weight: 600;
    font-size: 1rem;
    transform: translateY(0px);
  }
}

.research-section {
  margin-bottom: 1rem;
  display: none;
}

/* 初始加载时的 active 状态 - 无动画 */
.research-section.initial-load.research-active {
  display: block;
  opacity: 1;
  transform: translateY(0);
}

/* 切换时的 active 状态 - 有动画（先隐藏） */
.research-section.research-active:not(.initial-load) {
  display: block;
  opacity: 0;
  transform: translateY(10px);
}

/* 添加 fade-in 类后 - 显示动画 */
.research-section.research-active.fade-in:not(.initial-load) {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.4s ease, transform 0.4s ease;
}

.research-h2 {
  color: #444;
  border-bottom: 1px solid #444;
  padding-bottom: 0.5rem;
  font-size: 1.1rem;
}
.research-h3 {
  color: #444;
  font-size: 1.0rem;
  margin-top: 1rem;
}
.research-project {
  background-color: white;
  padding-top: 0.2rem;
  padding-bottom: 0.2rem;
  padding-left: 1rem;
  padding-right: 1rem;
  margin-bottom: 1rem;
  border-radius: 12px;
  border: 1px solid rgba(180, 190, 210, 0.3);
  backdrop-filter: blur(12px);
  box-shadow: 0 3px 5px rgba(0,0,0,0.1);
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
  transform: translateY(0);
  cursor: default;
}
.research-project:hover {
  transform: translateY(-1px) scale(1.001);
  box-shadow: 0 6px 12px rgba(0,0,0,0.16);
  border-color: rgba(255, 255, 255, 0.5);
}

.research-ul {
  padding-left: 1.5rem;
}


@media (max-width: 768px) {
  .research-header h1 {
    font-size: 0.9rem;
  }
  .research-header p {
    font-size: 0.9rem;
  }
  .research-tabs ul li {
    margin: 0.2rem;
  }
  .research-container {
    padding: 10px;
  }
  .research-h2 {
    font-size: 1.0rem;
  }
  .research-h3 {
    font-size: 0.9rem;
  }
  .research-ul {
    font-size: 0.9rem;
  }
}