:root{
    --bg: #faf0f0;
    --text: #3f3a3a;
    --line: rgba(108, 97, 97, 0.45);
  }
  
  *{ 
    box-sizing: border-box; 
}
 
  body{
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family:Arial;
    line-height: 1.6;
  }
  
  .container{
    max-width: 800px;
    margin: 0 auto;
    padding: 32px 20px 60px;
  }
  
  h1, h2, p, span{
    color: var(--text);
  }
  
  h1{
    margin-bottom: 12px;
  }
  
  h2{
    margin: 32px 0 12px;
  }
  
  .divider{
    border: none;
    border-top: 1px solid var(--text);
    margin: 24px 0;
  }

  .video-wrap{
    margin-top: 12px;
  }
  
  .video{
    width: 100%;
    height: auto;
    display: block;
    border-radius: 6px;
    outline: 1px solid rgba(142,127,127,0.4);
    background: rgba(255,255,255,0.25);
  }

  .para{
    margin-bottom: 16px;
  }
  
  .ref-item{
    margin-bottom: 10px;
  }

  /* Responsive */
  @media (max-width: 520px){
    .title{ font-size: 34px; }
    .section-title{ font-size: 28px; }
    .meta, .para, .ref-list, .section-subtitle{ font-size: 16px; }
  }