/* ===== 欧众 Ozon 学习中心 美化样式 ===== */
:root {
  --xl-purple: #7B5CF0;
  --xl-blue: #1E2A78;
  --xl-pink: #E8338B;
}

/* 顶部品牌 banner */
.md-header {
  background: linear-gradient(120deg, var(--xl-purple) 0%, var(--xl-blue) 55%, var(--xl-pink) 100%) !important;
  height: 3.2rem;
}
.md-header__topic, .md-header__title {
  font-weight: 700;
}
.md-header__button.md-logo {
  display: none;
}

/* 首页 hero */
.hero {
  text-align: center;
  padding: 2.5rem 1rem 1.5rem;
  background: linear-gradient(120deg, rgba(123,92,240,.10), rgba(232,51,139,.10));
  border-radius: 16px;
  margin-bottom: 1.5rem;
}
.hero img {
  width: 120px; height: 120px; border-radius: 24px;
  box-shadow: 0 8px 24px rgba(30,42,120,.25);
}
.hero h1 { margin: .8rem 0 .3rem; font-size: 1.9rem; }
.hero p { color: #555; margin: 0; }

/* 视频卡片网格 */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.2rem;
  margin-top: 1rem;
}
.video-card {
  border: 1px solid #eee;
  border-radius: 14px;
  overflow: hidden;
  box-shadow: 0 2px 10px rgba(0,0,0,.05);
  background: #fff;
}
.video-card video {
  width: 100%;
  display: block;
  background: #000;
  aspect-ratio: 16/9;
}
.video-card .cap {
  padding: .6rem .8rem;
  font-weight: 600;
  font-size: .95rem;
  color: #222;
}

/* 分组标题配色 */
h2 {
  border-left: 5px solid var(--xl-pink);
  padding-left: .6rem;
  margin-top: 2rem;
}

/* 表格美化 */
table {
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 1px 6px rgba(0,0,0,.06);
}