html {
  min-height: 100vh;
  font-size: calc(100vw / 7.5);
}

body {
  margin: 0 auto;
  width: 100%;
  max-width: 640px;
  height: 100%;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', 'Microsoft Yahei', sans-serif;
  font-size: 0.28rem;
  line-height: 1;
  background: #ffffff;
  -webkit-text-size-adjust: 100%;
  -ms-text-size-adjust: 100%;
  -webkit-tap-highlight-color: rgba(0, 0, 0, 0.05);
}

@media (min-width: 640px) {
  html {
    font-size: 85.2px;
  }
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-box-sizing: border-box;
}

a {
  text-decoration: none;
  color: #333;
}

img {
  width: 100%;
  height: auto;
  display: block;
}

ul,
li {
  padding: 0;
  margin: 0;
  list-style: none;
}

p {
  margin: 0;
  padding: 0;
  line-height: 1;
}

/* 富文本 */
img {
  max-width: 100% !important;
}

p,
h1,
h2,
h3,
h4,
h5,
h6 {
  font-size: 0.28rem;
}

button {
  border: none;
  outline: none;
  background: transparent;
  cursor: pointer;
  padding: 0;
  margin: 0;

  -webkit-tap-highlight-color: transparent;
  /* iOS 禁用点击高亮 */
  -webkit-user-select: none;
  user-select: none;
}

input {
  border: none;
  outline: none;
  background: transparent;
}

.home-page {
  position: absolute;
  width: 100%;
  max-width: 7.5rem;
  background-color: #23282e;
  background-image: url('../img/bg.png');
  background-size: contain;
  background-position: top center;
  background-repeat: no-repeat;
  min-height: 30.5rem;
}

.logo {
  position: relative;
  width: 3.3rem;
  height: 0.14rem;
  float: right;
  margin-right: 0.56rem;
  margin-top: 0.68rem;
  margin-bottom: 0.66rem;
}

.title {
  position: relative;
  width: 6.6rem;
  height: 3.2rem;
  margin: 0 auto;
}

.content {
  padding: 0 0.56rem;
  padding-top: 2.79rem;
}

.intro-txt {
  font-size: 0.28rem;
  color: #ffffff;
  font-weight: normal;
  line-height: 0.39rem;
  text-align: justify;
}

.case-demo-box {
  margin-top: 0.75rem;
  margin-bottom: 0.52rem;
}

.case-demo-title {
  position: relative;
  font-size: 0.39rem;
  color: #31b79f;
  /* float: left; */
}

.case-demo-box ul {
  position: relative;
}
/* .case-demo-box ul li:nth-child(1){
        padding-bottom: 2rem;
    } */

.case-demo-box ul li:nth-child(1),
.case-demo-box ul li:nth-child(2),
.case-demo-box ul li:nth-child(5) {
  /* padding-bottom: 0.72rem; */
  padding-bottom: 0.52rem;
}
.case-demo-box ul li:nth-child(3),
.case-demo-box ul li:nth-child(4) {
  /* padding-bottom: 1.02rem; */
  padding-bottom: 0.82rem;
}

.case-title-flex {
  display: flex;
  justify-content: space-between;
  /* 左右分布 */
  align-items: center;
  /* 上下居中 */
  width: 100%;
  padding: 0.2rem 0;
  /* 可选的上下间距 */
  box-sizing: border-box;
}

.case-title {
  max-width: 80%;
  /* 根据实际需要限制标题图宽度 */
  height: auto;
  display: block;
}

.case-title1 {
  width: 4.4rem;
  height: 0.58rem;
}

.case-title2 {
  width: 4.09rem;
  height: 0.58rem;
}

.case-title3 {
  width: 4.4rem;
  height: 0.58rem;
}

.case-title4 {
  width: 4.09rem;
  height: 0.58rem;
}

.case-title5 {
  width: 4.66rem;
  height: 0.59rem;
}

.case-title-box {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 0.2rem;
  padding: 0.05rem 0.2rem 0.05rem 0.1rem;
  font-size: 0.32rem;
  color: #31b79f;
  font-weight: 500;
  border: 0.01rem solid #31b79f;
  border-radius: 0.16rem;
}
.case-title-box::after {
  content: '';
  position: absolute;
  top: 0.21rem;
  left: 0.48rem;
  width: 0.07rem;
  height: 0.07rem;
  background: url(../img/dot.png) no-repeat center center / 100% 100%;
}
.case-title-box span {
  font-size: 0.28rem;
  line-height: 0.38rem;
}
.case-title-box p {
  font-size: 0.3rem;
  line-height: 0.38rem;
}
.case-title-box p.last {
  text-indent: -0.2rem;
}
.sign-btn {
  height: auto;
  display: block;
  max-height: 100%;
  /* 避免撑开父元素高度 */
  width: 1.75rem;
  height: 0.6rem;
  position: relative;
  left: 0.1rem;
}

.sign-btn img {
  position: relative;
  width: 1.75rem;
  height: 0.6rem;
}

.case-txt {
  text-align: justify;
  font-weight: normal;
  color: #ffffff;
  line-height: 0.32rem;
  font-size: 0.28rem;
}

.case-time-txt {
  position: relative;
  color: #31b79f;
  position: relative;
  left: 0;
  font-size: 0.39rem;
  padding-bottom: 0.29rem;
}
.case-time-list p {
  width: 100%;
  position: relative;
  color: #31b79f;
  border: #31b79f 1px solid;
  text-align: center;
  padding: 0.09rem 0;
}

.case-time-list img {
  position: relative;
  width: 0.12rem;
  height: 0.1rem;
  margin: 0 auto;
  margin-top: 0.38rem;
  margin-bottom: 0.28rem;
}