/* --- 核心变量定义 --- */
:root {
  --main-color: #c7000a; /* 你的主色：红色 */
  --text-dark: #333333;
  --text-gray: #666666;
  --bg-white: #ffffff;
  --track-gray: #f0f0f0;
  --title-black: #333333;
  --line-color: #f0f0f0;

  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html,
body {
  height: 100%;
  margin: 0;
}
body {
  height: 100%;
  margin: 0;
  font-family: "Microsoft YaHei", sans-serif;
  display: flex;
  flex-direction: column;
}

.main-content {
  flex: 1; /* 这会让中间内容自动撑开，将 Footer 推到底部 */
  margin-top: 70px;
}

.red-title {
  font-size: 18px;
}

.red-title-line {
  border-bottom: 3px solid #c7000a;
  width: 80px;
  margin-top: 4px;
}

img {
  display: block !important;
}

.head-img {
  position: relative;
}

.head-img img {
  width: 100%;
}

.head-img .title {
  position: absolute;
  top: 0px;
  left: 15%;
  height: 100%;
  display: flex;
  align-items: center;
  color: var(--main-color);
  font-size: 20px;
  z-index: 99;
}

@media (max-width: 768px) {
  .head-img .title {
    left: 6%;
  }
  .head-img .title h1 {
    font-size: 24px;
  }
}