/* Combined CSS - index.css + default.css (cleaned & fixed) */

/* === Reset === */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html, body {
  height: 100%;
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  background-color: #f0f7ff; /* ✅ 主背景色 */
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: #333;
  text-align: center;
  padding: 0;
}

img {
  max-width: 100%;
  display: block;
  border: 0;
}

a {
  color: inherit;
  text-decoration: none;
}

h1, h3, h4 {
  text-align: center;
  margin: 1em 0;
  font-weight: 600;
}

/* === Layout Containers === */
.el-container {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.el-header, .el-footer {
  background-color: #ffffff;
  text-align: center;
  padding: 10px 0;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.05);
}

.el-main {
  flex: 1;
  padding: 20px;
  background-color: #d6e4f2;
}

.main-center {
  margin: 0 auto;
  max-width: 1200px;
  width: 100%;
}

/* === Grid System === */
.el-row {
  display: flex;
  flex-wrap: wrap;
  margin-left: -7.5px;
  margin-right: -7.5px;
}

.el-col {
  padding-left: 7.5px;
  padding-right: 7.5px;
}

.el-col-24 { flex: 0 0 100%; max-width: 100%; }
.el-col-12 { flex: 0 0 50%; max-width: 50%; }
.el-col-8  { flex: 0 0 33.3333%; max-width: 33.3333%; }
.el-col-6  { flex: 0 0 25%; max-width: 25%; }
.el-col-4  { flex: 0 0 16.6667%; max-width: 16.6667%; }

/* Responsive */
@media screen and (max-width: 768px) {
  .el-col-xs-24 { flex: 0 0 100%; max-width: 100%; }
  .el-col-xs-12 { flex: 0 0 50%;  max-width: 50%; }
  .el-col-xs-8  { flex: 0 0 33.3333%; max-width: 33.3333%; }
}

@media (min-width: 769px) and (max-width: 991px) {
  .el-col-sm-12 { flex: 0 0 50%; max-width: 50%; }
}

@media (min-width: 992px) {
  .el-col-md-8, .el-col-lg-8, .el-col-xl-8 {
    flex: 0 0 33.3333%;
    max-width: 33.3333%;
  }
}

/* === Grid Content Cards === */
.grid-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 20px;
}

.grid-content img {
  width: 80px;
  height: 80px;
  object-fit: contain;
  margin-bottom: 12px;
}

.grid-content h4 {
  font-size: 18px;
  font-weight: 600;
  margin: 8px 0 5px;
  color: #333;
}

.grid-content span {
  font-size: 14px;
  line-height: 1.6;
  color: #666;
  max-width: 280px;
}

/* === 下载按钮模块 === */
.btn-download a {
  display: inline-block;
  padding: 12px 24px;
  background-color: #409EFF;
  color: white;
  border-radius: 30px;
  font-weight: bold;
  transition: background-color 0.3s ease;
}

.btn-download a:hover {
  background-color: #66b1ff;
}

.home-el-button {
  margin: 10px 0;
  text-align: center;
}

.home-el-button a {
  display: block;
  padding: 10px;
  border: 1px solid #ddd;
  border-radius: 8px;
  transition: all 0.3s ease;
}

.home-el-button a:hover {
  background-color: #f5f5f5;
}

/* === 复制按钮 === */
button {
  padding: 10px 20px;
  font-size: 16px;
  background-color: #409EFF;
  color: #fff;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  margin: 6px;
}

button:hover {
  background-color: #66b1ff;
}
.link-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
  padding: 20px 0;
}

.link-grid a {
  flex: 1 1 calc(25% - 16px);
  max-width: 200px;
  text-align: center;
  padding: 14px 0;
  background: linear-gradient(to right, #4facfe, #00f2fe);
  color: white;
  text-decoration: none;
  font-weight: bold;
  font-size: 16px;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0, 191, 255, 0.3);
  transition: all 0.25s ease-in-out;
}

.link-grid a:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(0, 191, 255, 0.4);
  background: linear-gradient(to right, #00f2fe, #4facfe);
}

@media (max-width: 768px) {
  .link-grid a {
    flex: 1 1 calc(50% - 16px);
  }
}

@media (max-width: 480px) {
  .link-grid a {
    flex: 1 1 100%;
  }
}