*,
*::before,
*::after {
    box-sizing: border-box;
}
* { margin: 0;}
html, body {
  height: 100%;
  margin: 0;
  padding: 0;
}

body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background: #111 url(img/GraffitiBK.png) no-repeat center center fixed;
  background-size: cover;
  color: #fff;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
}

a { text-decoration: none;}

.main {
  width: 700px;
}

section.item{
  display: flex;
  flex-wrap: nowrap;
  justify-content:space-between;
  align-items: center;
  margin-bottom: 1em;
  border-radius: 10px;
  transition: all 0.3s;
  color: #fff;
}

a:hover section.item{
  background-color: rgba(255, 255, 255, 0.05);
  color: #ffd000;
}

.app-icon{
  width: 140px;
  height: 140px;
  display: flex;
  justify-content: center;
  align-items: center;
}

.app-icon img{
  background-color: #333;
  border-radius: 20px;
  width: 100px;
  height: 100px;
  box-shadow:
  inset 0 2px 0 rgba(255, 255, 255, 0.1),
  0 0 0 4px black,
  0 6px 10px rgba(0, 0, 0, 0.4);
}

h2 {
  font-size: 30px;
}

.description{
  text-align: left;
  font-size: 18px;
  width: 550px;
}

.line{
  margin: 20px 0;
  border-bottom: 2px dotted rgba(255, 255, 255, 0.2);
}

/* 手機板 */
@media (max-width: 750px) {

body {
  padding: 20px 0;
  align-items:start;
}

a:hover section.item{
  background: none;
}

.main {
  width: 90%;
}

section.item{
  flex-direction: column;
  justify-content:space-between;
  align-items: center;
}

.app-icon{
  width: 100%;
  height: 100%;
}

.app-icon img{
  width: 80px;
  height: 80px;
}

h2 {
  font-size: 22px;
}

.description{
  text-align: center;
  font-size: 16px;
  width: 100%;
}

}