.site-footer {
  display: flex;
  height: 200px;
  width: 100%;
  position: relative;
  overflow: hidden;
  color: rgba(225,225,225,1);
  background: url('../images/header-bg.jpg') center bottom / cover no-repeat;
}

/* 渐变遮罩保持不变 */
.site-footer::after {
  content: "";
  position: absolute;
  top: 0; 
  left: 0;
  height: 100%;
  width: 100%;
  z-index: 0;
}

/* 导航 - 大屏竖直绝对定位 */
.footer-nav {
  position: absolute;
  top: 15px;
  left: 20%;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  height: calc(100% - 50px);
  max-width: 200px;
  padding: 0;
  width: auto;
  z-index: 3;
}

.footer-nav a {
  position: relative;
  color: rgba(225,225,225,1);
  text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.5);
  text-decoration: none;
  font-weight: 600;
  margin: 0 0 10px 0;
  padding: 6px 12px 6px 28px;
  border-radius: 6px;
  text-align: left;
  transition: all 0.3s ease;
  display: block;
}

.footer-nav a::before {
  content: "•";
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: rgba(224, 239, 236, 0.8);
  font-size: 20px;
  line-height: 1;
  pointer-events: none;
}

.footer-nav a:hover {
  font-family: Georgia, serif;
  text-decoration: underline;
  transform: translateY(-2px);
  background: rgba(31, 70, 39, 0.6);
}

/* 版权信息 */
.footer-main {
  font-family: Georgia, serif;
  position: absolute;
  top: 15px;
  left: 45%;
  z-index: 3;
}

.footer-main p {
  line-height: 1.5;
  user-select: text;
  margin: 0.3em 0;
  cursor: text;
  color: #f1f1f1;
  text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.7);
}

/* 手机端适配：取消绝对定位，改为纵向堆叠 */
@media screen and (max-width: 600px) {
  .site-footer {
    flex-direction: column;
    height: auto;
    padding: 20px 10px;
  }

  .footer-nav {
    position: relative;
    top: auto;
    left: auto;
    height: auto;
    max-width: 100%;
    width: 100%;
    margin-bottom: 20px;
    flex-direction: row; /* 横向排列，方便手机显示 */
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
  }

  .footer-nav a {
    margin: 0;
    padding: 6px 12px;
    flex: 1 1 auto; /* 使链接可以换行占据可用空间 */
    text-align: center;
    border-radius: 6px;
  }

  .footer-nav a::before {
    left: 6px;
    font-size: 16px;
  }

  .footer-main {
    position: relative;
    top: auto;
    left: auto;
    max-width: 100%;
    width: 100%;
    text-align: center;
    margin: 0 auto;
  }
}