/* ===== 基本變數，可按需求調色 ===== */
:root{
  --title-green: #76AD28;
  --text-black: #000000;
  --bg-green: rgba(144, 199, 68, 0.15);
}

.lecturer .btn_tab.is-active::before {
  background: linear-gradient(360deg, #FBBD00 0%, #91C744 60%);
  box-shadow: 0 0 0.416rem 0.29rem rgba(255, 255, 255, 0.35), inset 0 4px 10px rgba(0, 0, 0, .12);
}

.lecturer-content{
  position: relative;
  padding: 60px;
  background: linear-gradient(180deg, rgb(144 199 68 / 23%) 30%, rgba(251, 188, 0, 0) 50%);
  border-radius: 30px;
}

/* 主題內容 */
.topic {
  margin: 0 auto;
  text-align: center;
}

.topic-title {
  color: var(--title-green);
  font-size: clamp(1.5rem, 2.8vw, 50px);
  font-weight: 900;
  line-height: 1.4;
}

.topic-subtitle {
  color: var(--title-green);
  font-size: clamp(1.2rem, 2vw, 40px);
  font-weight: 600;
  line-height: 1.4;
  margin: 0 0 20px;
}

.topic-desc p {
  margin: 0;
  font-size: clamp(1.2rem, 2vw, 40px);
  font-weight: 500;
  line-height: 1.5;
  color: var(--text-black);
}

/* 時間地點資訊 */
.agenda-info {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 15px;
  margin: 30px 0;
  font-size: clamp(1.15rem, 1.2vw, 24px);
  color: var(--text-black);
}

.agenda-info__item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.agenda-info__icon {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.agenda-info__icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

/* 講師照片 */
.lecturer-item {
  padding: 20px 0;
  display: flex;
  justify-content: center;
  align-items: center;
}

.lecturer-item .col-12 {
  width: 90%;
}

.lecturer-item img {
  width: 100%;
  display: block;
  margin: 0 auto;
}

/* RWD */
@media (max-width: 768px) {
  .lecturer-content {
    padding: 5% 3%;
    border-radius: 15px;
  }
  .lecturer-item {
    padding: 5px 0;
  }
  .agenda-info {
    margin: 20px 0;
    /* font-size: 16px; */
  }
  .agenda-info__icon {
    width: 20px;
    height: 20px;
  }
  .topic-subtitle{
    margin: 0 0 10px;
  }
}