body {
  font-family: Arial, Helvetica, sans-serif;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  margin: 0;
  padding: 0;
  font-size: 1.1rem;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
}

a:link,
a:visited {
  color: inherit;
  /* 继承父元素颜色 */
  text-decoration: none;
}

nav {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  font-weight: bold;
}

header {
  /* background: #eeeeef; */
  /* background: linear-gradient(to right, #ccc, #eee); */
  /* background-color: transparent; */
  /* color: #777; */
  padding: 1rem;
  /* margin-bottom: 1rem; */
  border-bottom: 1px solid #ccc;
}

header .logo img {
  width: 128px;
}

header .container {
  display: flex;
  /* 启用 Flexbox 布局 */
  justify-content: space-between;
  /* 子元素两端对齐 */
  align-items: center;
  /* 子元素垂直居中 */
}

main {
  /* 让main元素占据所有剩余的垂直空间，从而将footer推到底部 */
  flex: 1;
  /* padding: 0rem 2rem; */
}

main .container {
  padding: 0 1rem;
}

main a {
  color: #0059ff !important;
}

main h1 {
  font-size: 1.8rem;
  margin: 2rem 0;
  text-align: center;
}

main h2 {
  font-size: 1.3rem;
  margin: 1.5rem 0;
}

main h3 {
  font-size: 1.1rem;
  margin: 1rem 0;
}

.hero {
  position: relative; /* 作为绝对定位参照 */
}

.video {
  width: 100%; /* 保证宽度填满 */
  height: 1230px; /* 保证高度填满 */
  display: block; /* 避免行内元素间隙影响布局 */
  object-fit: cover; /* 关键：保持比例填满，不拉伸 */
}

.slogan {
  position: absolute; /* 叠加到视频上方，不占文档流空间 */
  inset: 0; /* 上下左右全部贴合容器 */
  z-index: 1;
  color: white;
  text-align: center;
  display: flex; /* 居中内容 */
  flex-direction: column; /* 纵向排列，让 h1 和 p 换行 */
  align-items: center;
  justify-content: center;
  gap: 0.5rem; /* 默认已清除 margin，用 gap 控制间距 */
  padding: 0 1rem; /* 适度左右内边距，防止文本贴边 */
}

.slogan h1,
.slogan h2,
.slogan p {
  margin: 0;
}

.chapter {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-top: 1rem;
}

.contact form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  max-width: 100%;
  width: 100%;
  margin: 0 auto;
}

.contact input {
  width: 100%;
  padding: 0.5rem;
  border: 1px solid #ccc;
  border-radius: 4px;
  font-size: 1rem;
  font-family: inherit;
  box-sizing: border-box;
}

.contact textarea {
  width: 100%;
  padding: 0.5rem;
  border: 1px solid #ccc;
  border-radius: 4px;
  font-size: 1rem;
  resize: vertical;
  min-height: 10rem;
  font-family: inherit;
  box-sizing: border-box;
}

.contact button {
  padding: 0.5rem 2rem;
  border: none;
  border-radius: 4px;
  background-color: #0080ff;
  color: white;
  font-size: 1rem;
  cursor: pointer;
}

footer {
  /* background: #eeeeef; */
  /* background: linear-gradient(to right, #ccc, #eee); */
  /* background-color: transparent; */
  color: #777;
  padding: 1.5rem;
  text-align: center;
  margin-top: 1.5rem;
  border-top: 1px solid #ccc;
}

footer a {
  color: #006934 !important;
}

.footerNav a {
  padding-right: 0.5rem;
}
.copyright {
  padding-top: 1rem;
}
.domain {
  padding-top: 1rem;
}