body {
  width: 100%;
  min-width: 320px;
  max-width: 640px;
  margin: 0 auto;
  font-size: 14px;
  line-height: 1.5;
  color: #666;
}

/*点击高亮我们需要清除清除  设置为transparent 完成透明*/
* {
  -webkit-tap-highlight-color: transparent;
}

/*在移动端浏览器默认的外观在iOS上加上这个属性才能给按钮和输入框自定义样式*/
input {
  -webkit-appearance: none;
}

/*禁用长按页面时的弹出菜单*/
img,
a {
  -webkit-touch-callout: none;
}

a {
  color: #666;
  text-decoration: none;
}

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

img {
  vertical-align: middle;
}

div {
  /* css3 盒子模型 */
  box-sizing: border-box;
}

/* 头部 */
.stc-header {
  position: fixed;
  overflow: hidden;
  min-width: 320px;
  max-width: 640px;
  width: 100%;
  height: 44px;
  z-index: 15;
  background-color: #206CC0;
}

.stc-header-title {
  width: 100%;
  height: 44px;
  margin: 0 50px 0 0;
  text-align: center;
  line-height: 44px;
  font-family: 'PingFang SC';
  color: #FFFFFF;
}

.stc-header-btn {
  position: absolute;
  top: 0;
  right: 0;
  width: 44px;
  height: 44px;
}

.stc-header-btn::before {
  content: "";
  display: block;
  width: 20px;
  height: 18px;
  background: url(../images/header-btn.png) no-repeat;
  background-size: 20px 18px;
  margin: 14px 0 0 5px;
}

/* 导航 */
.stc-nav {
  display: none;
  position: fixed;
  right: 0;
  width: 72px;
  height: 100%;
  z-index: 20;
  background: #FFFFFF;
}

.stc-nav ul li a {
  display: block;
  margin: 16px 0 0 0;
  color: #333333;
  font-family: 'PingFang SC';
  font-size: 12px;
  text-align: center;
}

.stc-nav ul li a:link {
  color: #333333;
}

.stc-nav ul li a:hover,
visited {
  color: #206CC0;
}

.stc-nav ul li a img {
  display: block;
  margin: 0 auto;
  margin-bottom: 3px;
}

/* 首页 */
.single-home {
  overflow: hidden;
  min-width: 320px;
  width: 100%;
  height: 768px;
  z-index: -10;
  background: url(../images/bg.jpg) no-repeat;
  background-size: cover;
  -webkit-background-size: cover;
  -o-background-size: cover;
  background-position: center 0;
}

.home-log {
  width: 216px;
  height: 31px;
  margin: 3% auto;
}

.home-log img {
  width: 216px;
  height: 31px;
}

.single-home ul {
  margin: 0 5%;
}

.single-home ul li {
  margin: 0 auto;
  margin-bottom: 3%;
}

.single-home ul li:nth-child(1) {
  width: 321px;
  height: 134px;
  background: url(../images/leibie1.png);
  background-size: 321px 134px;
}

.single-home ul li:nth-child(1) div img {
  width: 189px;
  height: 107px;
  margin: 14px 0 0 14px;
}

.single-home ul li:nth-child(2) {
  width: 321px;
  height: 134px;
  background: url(../images/leibie5.png);
  background-size: 321px 134px;
}

.single-home ul li:nth-child(2) div img {
  width: 182px;
  height: 106px;
  margin: 14px 0 0 14px;
}

.single-home ul li:nth-child(3) {
  width: 321px;
  height: 134px;
}

.single-home ul li:nth-child(3) div:nth-child(1) {
  display: inline-block;
  vertical-align: top;
  width: 156px;
  height: 134px;
  background: url(../images/leibie3.png);
  background-size: 156px 134px;
}

.single-home ul li:nth-child(3) div:nth-child(1) img {
  width: 137px;
  height: 77px;
  margin: 9px 10px 0 10px;
}

.single-home ul li:nth-child(3) div:nth-child(2) {
  display: inline-block;
  margin-left: 1%;
  width: 156px;
  height: 134px;
  background: url(../images/leibie4.png);
  background-size: 156px 134px;
}

.single-home ul li:nth-child(3) div:nth-child(2) img {
  width: 106px;
  height: 100px;
  margin: 9px 0 0 12px;
}

.single-home ul li:nth-child(4) {
  width: 321px;
  height: 134px;
  background: url(../images/leibie2.png);
  background-size: 321px 134px;
}

.single-home ul li:nth-child(4) div img {
  width: 204px;
  height: 100px;
  margin: 16px 0 0 14px;
}


/* 关于司达行 */
.single-about div:nth-child(1) {
  width: 320px;
  height: 240px;
  margin: 0 auto;
}

.single-about div:nth-child(2) {
  min-width: 320px;
  width: 100%;
  /* width: 375px; */
  height: 4268px;
  z-index: -10;
  background: url(../images/about-2022-08-10.jpg) no-repeat;
  background-size: contain;
  -webkit-background-size: contain;
  -o-background-size: contain;
  background-position: center 0;
}



/* 质量认证 */
.single-quality {
  min-width: 320px;
  width: 100%;
  /* width: 375px; */
  height: 994px;
  z-index: -10;
  background: url(../images/quality.jpg) no-repeat;
  background-size: contain;
  -webkit-background-size: contain;
  -o-background-size: contain;
  background-position: center 0;
}

/* 实验室 */
.single-lab {
  min-width: 320px;
  width: 100%;
  /* width: 375px; */
  height: 843px;
  z-index: -10;
  background: url(../images/lab-2024-10-21.jpg) no-repeat;
  background-size: contain;
  -webkit-background-size: contain;
  -o-background-size: contain;
  background-position: center 0;
}

/* 密封工具 */
.single-tools {
  min-width: 320px;
  width: 100%;
  /* width: 375px; */
  height: 1327px;
  z-index: -10;
  background: url(../images/tools.jpg) no-repeat;
  background-size: contain;
  -webkit-background-size: contain;
  -o-background-size: contain;
  background-position: center 0;
}

/* 航空密封 */
.single-aviation {
  min-width: 320px;
  width: 100%;
  /* width: 375px; */
  height: 2234px;
  z-index: -10;
  background: url(../images/aviation-2024-10-18.jpg) no-repeat;
  background-size: contain;
  -webkit-background-size: contain;
  -o-background-size: contain;
  background-position: center 0;
}

.btn {
  position: relative;
  width: 90px;
  height: 28px;
  border: none;
  outline: none;
  background: #206CC0;
  cursor: pointer;
  overflow: hidden;
  user-select: none;
  border-radius: 13px;
  color: #fff;
  font: bold 12px 'PingFang SC';
  letter-spacing: 1px;
}

.ripple {
  position: absolute;
  background: rgba(255, 255, 255, 1);
  border-radius: 100%;
  transform: scale(0);
  pointer-events: none;
}

.ripple.show {
  animation: ripple .75s ease-out;
}

@keyframes ripple {
  to {
    transform: scale(2);
    opacity: 0;
  }
}