@import url('https://fonts.googleapis.com/css2?family=Lato:wght@300&display=swap');

/* 设置全局颜色 */
:root {
  --primary-color: #52be80;
  --secondary-color: #a9dfbf;
  --dark-color: #34495e ; 
  --light-color: #f4f4f4;
}

* {
  /* 无需添加宽度长度而添加填充和边框 */
  box-sizing: border-box;
  padding: 0;
  margin: 0;
}

body {
  font-family: 'Lato', sans-serif;
  color: #333;
  line-height: 1.6; 
}

ul {
  list-style-type: none;
}

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

h1, h2 {
  font-weight: 300;
  line-height: 1.2;
  margin: 10px 0;
}

p {
  margin: 10px 0; 
}

img {
  width: 100%;
}

/* navBar */
.navBar {
  background-color: var(--primary-color);
  color: #fff;
  height: 70px; 
}

.navBar ul {
  display: flex;
}

.navBar a {
  color: #fff;
  padding: 10px;
  margin: 0 5px; 
}

.navBar ul a:hover {
  border-bottom: 2px #fff solid;
}

.navBar .flex {
  justify-content: space-between;
}

/* showcase */
.showcase {
  height: 400px;
  background-color: var(--primary-color);
  color: #fff; 
  position: relative;
}

.showcase h1 {
  font-size: 40px;
}

.showcase p {
  margin: 20px 0; 
}

.showcase .grid {
  overflow: visible;
  grid-template-columns: 55% 45%;
  gap: 30px; 
}

.showcase-form {
  position: relative;
  top: 60px;
  height: 350px; 
  width: 400px;
  padding: 40px;
  z-index: 100;
  justify-self: flex-end;
}

.showcase-form .form-control {
  margin: 30px 0;
}

.showcase-form input[type='text'],
.showcase-form input[type='email'] {
  border: 0;
  border-bottom: 1px solid #b4becb;
  width: 100%;  
  padding: 3px;
  font-size: 16px;
}

.showcase-form input:focus {
  outline: none;
}

/* 设置蓝色背景右下斜着 */
.showcase-form input:focus {
  outline: none;
}

.showcase::before,
.showcase::after {
  content: '';
  position: absolute;
  height: 100px;  
  bottom: -70px;
  right: 0;
  left: 0;
  background: #fff;
  transform: skewY(-3deg);
  -webkit-transform: skewY(-3deg);
  -moz-transform: skewY(-3deg);
  -ms-transform: skewY(-3deg);
}

/* stats */
.stats {
  padding-top: 100px;
  animation: slideInFromBottom 1s ease-in;
}

.stats-heading {
  max-width: 500px;
  margin: 0 auto !important;
}

.stats .grid h3 {
  font-size: 35px; 
}

.stats .grid p {
  font-size: 20px;
  font-weight: bold;
}

/* cli */
.cli .grid {
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(2, 1fr);
}

.cli .grid > *:first-child {
  /* grid-column: 1 / span 2;
  grid-row: 1 / span 2; */
  grid-column: 1 ;
  grid-row: 1;
}

/* cloud */
.cloud .grid {
  grid-template-columns: 4fr 3fr;
}

/* languages */
.languages .flex {
  flex-wrap: wrap;
}

.languages .card {
  text-align: center;
  margin: 18px 10px 40px;
  transition: transform 0.2s ease-in;
}

.languages .card h4 {
  font-size: 20px;
  margin-bottom: 10px;
}

.languages .card:hover {
  transform: translateY(-15px);
}

/* Footer */
.footer .social a {
  margin: 0 10px; 
}

/* Tablets and under */
@media (max-width: 768px) {
    .grid,
    .showcase .grid,
    .stats .grid,
    .cli .grid,
    .cloud .grid {
        grid-template-columns: 1fr;
        grid-template-rows: 1fr;
    }

    .showcase {
        height: auto;
    }

   .showcase-text {
        text-align: center;
        margin-top: 40px;
        animation: slideInFromTop 1s ease-in;
    } 

    .showcase-form {
        justify-self: center;
        margin: auto;
    }

    .cli.grid > *:first-child {
        grid-column: 1;
        grid-row: 2;
    }
}

/* Mobile */
@media (max-width: 500px) {
  .navBar {
    height: 110px;
  } 

  .navBar .flex {
    flex-direction: column;
  }

 .navBar ul {
    padding: 10px;
    background-color: rgba(0, 0, 0, 0.1);
  }

  .showcase-form{
    justify-self: center;
    margin: auto;
  }

  .showcase-text p {
    padding: 40px;

  }
}

/* Utilities */
.container {
  max-width: 1100px;
  margin: 0 auto;
  overflow: auto; 
  padding: 0 40px;
}

.card {
  background-color: #fff;
  color: #333;
  border-radius: 10px; 
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.2);
  padding: 20px;
  margin: 10px;
  text-align: center;
}

.btn {
  display: inline-block;
  padding: 10px 30px;
  cursor: pointer; 
  background: var(--primary-color);
  color: #fff;
  border: none;
  border-radius: 5px;
}

.btn-outline {
  /* 透明 */
  background-color: transparent;
  border: 1px #fff solid;
}

.btn:hover {
  transform: scale(0.98);
}

/* 背景和按钮颜色 */
.bg-primary, .btn-primary {
  background-color: var(--primary-color);
  color: #fff;
}

.bg-secondary, .btn-secondary {
  background-color: var(--secondary-color);
  color: #fff;
}

.bg-dark, .btn-dark {
  background-color: var(--dark-color);
  color: #fff; 
}

.bg-light, .btn-light {
  background-color: var(--light-color);
  color: #333; 
}

.bg-primary a,
.btn-primary a,
.bg-secondary a,
.btn-secondary a,
.bg-dark a,
.btn-dark a {
  color: #fff;
}

/* 文本尺寸 */
.lead {
  font-size: 20px; 
}

.sm {
  font-size: 1rem;
}

.md {
  font-size: 2rem; 
}

.lg {
  font-size: 3rem; 
}



.text-center {
  text-align: center;
}

.flex {
  display: flex;
  justify-content: space-between;
  align-items: center; 
  height: 100%;
}

.grid {
  display: grid;
  /* 两列 */
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  justify-content: center;
  align-items: center;
  height: 100%;
}

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

/* margin */
.my-1 {
  margin: 1rem 0;
}

.my-2 {
  margin: 1.5rem 0; 
}

.my-3 {
  margin: 2rem 0;
}

.my-4 {
  margin: 3rem 0;
}

.my-5 {
  margin: 4rem 0; 
}