html, body {
  height: 100%;
  margin: 0;
  padding: 20px 0 0 0;
  font-family: Arial, sans-serif;
  background-color: #f9f9f9;
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
  min-height: 100vh;
}
body::after {
  content: "";
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100vw; 
  height: 1000px; 
  background: url('../images/dzq.png') no-repeat center bottom;
  background-size: cover; 
  pointer-events: none;
  opacity: 0.3;
  z-index: 0;
}
h1, .video-container, .description {
  position: relative;
  z-index: 1;
}
h1 {
  color: #333;
  margin-bottom: 20px;
}
.video-container {
  max-width: 1200px;
  width: 100%;
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
  background-color: #000;
  border-radius: 8px;
  overflow: hidden;
}
video {
  width: 100%;
  height: auto;
  display: block;
}
.description {
  margin-top: 15px;
  color: #555;
  text-align: center;
  font-size: 16px;
}