html {
  font-size: 10px;
}

body {
  font-size: 1.2rem;
}

.pc-none {
  display: none;
}

.pl {
  padding-left: 11vw;
}

.pr {
  padding-right: 11vw;
}

.header {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: justify;
      -ms-flex-pack: justify;
          justify-content: space-between;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 6.1vw;
  background-color: #fff;
  border-bottom: 1px solid rgba(0, 0, 0, 0.1);
  -webkit-box-sizing: border-box;
          box-sizing: border-box;
  z-index: 20;
}

.header .logo {
  width: 9.7vw;
}

.nav {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  font-size: 1.6rem;
  text-align: center;
}

.nav .nav-item {
  cursor: pointer;
  text-decoration: none;
  color: #000;
}

.nav .nav-item:hover {
  text-decoration: underline;
}

.nav .nav-item + .nav-item {
  margin-left: 5.5vw;
}

/* 主体 */
.main {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  position: relative;
  padding-top: 10vw;
}

.main .main-text {
  margin-top: 6vw;
}

.main .title {
  display: block;
  width: 27.8vw;
}

.main .block {
  width: 4.2vw;
  height: 0.56vw;
  background-color: #E62F20;
  margin: 2.56vw 0 1.7vw;
}

.main .info {
  font-size: 1.4rem;
  line-height: 3.2rem;
  max-width: 32.6vw;
}

.main .screenshot {
  width: 25.7vw;
  height: 48.8vw;
  margin-left: 6vw;
}

.main .code-box {
  margin-top: 2.65vw;
  margin-left: -2rem;
  width: 50vw;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  flex-wrap: wrap;
}

.main .code {
  text-align: center;
  margin-left: 2rem;
  margin-top: 2rem;
}

.main .code-img {
  width: 7em;
  vertical-align: top;
}

/* 特色功能 */
.function {
  padding-top: 5.3vw;
  margin: 0 11vw;
}

.function .title {
  text-align: center;
  font-size: 3.47vw;
  font-weight: bold;
  margin-bottom: 1.94vw;
}

.function .ordinary-func {
  color: #D2D2D2;
  font-size: 1.38vw;
  text-align: center;
}

.function .space {
  margin: 0 0.7vw;
}

.function .special-func {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -ms-flex-wrap: wrap;
      flex-wrap: wrap;
  margin-left: -3.3%;
}

.special-func-item {
  width: 30%;
  height: 17vw;
  padding-top: 5vw;
  margin-left: 3.3%;
}

.special-func-item .icon-box {
  width: 4.17vw;
  height: 4.17vw;
  margin-bottom: 1.39vw;
}

.special-func-item .t {
  font-size: 1.8rem;
  font-weight: bold;
  margin-bottom: 0.4vw;
}

.footer {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -ms-flex-pack: distribute;
      justify-content: space-around;
  padding: 4.16vw 11vw;
  margin-top: 8.3vw;
}

.footer .contact {
  margin-top: 0.8vw;
}

.footer .t {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
}

.footer .icon-box {
  width: 2.78vw;
  height: 2.78vw;
  margin-right: 0.9vw;
}

.footer .c {
  margin-top: 0.9vw;
  padding-left: 3.68vw;
}

.footer .code-box {
  width: 6em;
  text-align: center;
  color: #fff;
}

.footer .code {
  width: 100%;
  vertical-align: top;
}

.footer .code-box p {
  margin-top: 0.9vw;
}

.copyright:hover {
  text-decoration: underline;
}


/* 背景 */
.bg-block-l {
  position: absolute;
  left: 0;
  top: 43vw;
  width: 9vw;
  z-index: -1;
}

.bg-block-r {
  position: absolute;
  right: 0;
  top: 0;
  width: 32.56vw;
  z-index: -1;
}

@media screen and (max-width: 1350px) {
  .pr {
    padding-right: 5vw;
  }
  
  .pl {
    padding-left: 5vw;
  }
  
  .main .info {
    max-width: 42vw;
  }
  
  .main .screenshot {
    margin-left: 3vw;
  }
  
  .function {
    margin: 0 5vw;
  }
  
	.special-func-item {
    width: 30%;
    height: 15vw;
  }
}

@media screen and (max-width: 950px) {
  .special-func-item {
    height: 20vw;
  }
}

/* 字体 */
@media screen and (min-width: 1440px) {
  html {
    font-size: 16px;
  }
}

@media screen and (min-width: 2000px) {
  html {
    font-size: 18px;
  }
}

@media screen and (min-width: 3000px) {
  html {
    font-size: 20px;
  }
}