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

body {
  font-family: Arial, sans-serif;
  line-height: 1.6;
}

.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 20px;
  background: #147d4e;
  color: #fff;
  position: sticky;
  top: 0;
  z-index: 1000;
}

.nav a {
  color: #fff;
  margin-left: 15px;
  text-decoration: none;
  font-size: 14px;
}

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

.hero {
  text-align: center;
  padding: 60px 20px;
  background: #f5f5f5;
}

.hero h1 {
  font-size: 2rem;
  margin-bottom: 10px;
}

.hero p {
  margin-bottom: 20px;
}

.introduce {
  text-align: start;
  text-indent: 2em;
}

.btn-group {
  display: flex;
  gap: 10px;
  justify-content: center;
}

.btn {
  display: inline-block;
  padding: 10px 20px;
  background: #147d4e;
  color: #fff;
  text-decoration: none;
  border-radius: 5px;
}

.btn:hover {
  opacity: 0.9;
}

.btn-alt {
  background: #198754;
}

.features, .screenshots, .download {
  padding: 40px 20px;
  text-align: center;
}

.features h2, .screenshots h2, .download h2 {
  margin-bottom: 20px;
}

.feature-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 20px;
}

.feature {
  flex: 1 1 200px;
  background: #f9f9f9;
  padding: 20px;
  border-radius: 10px;
}

.screenshot-list {
  display: flex;
  gap: 15px;
  justify-content: center;
  flex-wrap: wrap;
}

.screenshot-list img {
  width: 200px;
  border-radius: 10px;
}

.footer {
  background: #eee;
  color: #5f6464;
  text-align: center;
  padding: 20px;
  font-size: 14px;
}

.footer a {
  color: #929797;
  text-decoration: none;
}

/*.modal-simple {*/
/*  position: fixed;*/
/*  inset: 0;*/
/*  background: rgba(0, 0, 0, 0.7);*/
/*  display: flex;*/
/*  justify-content: center;*/
/*  align-items: center;*/
/*  z-index: 2000;*/
/*}*/

/*.modal-simple .guide-mask {*/
/*  background: #fff;*/
/*  padding: 20px;*/
/*  border-radius: 10px;*/
/*  text-align: center;*/
/*  max-width: 260px;*/
/*}*/

/*.modal-simple p {*/
/*  font-size: 16px;*/
/*  line-height: 1.6;*/
/*  color: #333;*/
/*  margin-bottom: 15px;*/
/*}*/

/*.modal-simple .btn {*/
/*  display: inline-block;*/
/*  padding: 8px 15px;*/
/*  background: #147d4e;*/
/*  color: #fff;*/
/*  border-radius: 5px;*/
/*  cursor: pointer;*/
/*}*/
/*.modal-simple .btn.simple {*/
/*  color: inherit;*/
/*  background: rgb(115, 118, 122);*/
/*}*/

.section-box {
  text-align: center;
  padding: 40px 20px;
}
.modal-simple {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0; /* 兼容旧内核，替代 inset */
    background: rgba(0, 0, 0, 0.7);
    z-index: 2000;

    /* Flex 居中，含旧版前缀 */
    display: -webkit-box;
    display: -webkit-flex;
    display: flex;
    -webkit-box-pack: center;
    justify-content: center;
    -webkit-box-align: center;
    align-items: center;

    width: 100%;
    height: 100%;
    -webkit-transform: translateZ(0); /* 旧微信渲染修复 */
    transform: translateZ(0);
}

.modal-simple .guide-mask {
    background: #fff;
    padding: 20px;
    border-radius: 10px;
    -webkit-border-radius: 10px; /* 旧前缀 */
    text-align: center;
    max-width: 260px;
    width: 86%; /* 窄屏适配，防止旧内核撑出屏幕 */
    box-sizing: border-box;
}

.modal-simple p {
    font-size: 16px;
    line-height: 1.6;
    color: #333;
    margin-bottom: 15px;
}

.modal-simple .btn {
    display: inline-block;
    padding: 8px 15px;
    background: #147d4e;
    color: #fff;
    border-radius: 5px;
    -webkit-border-radius: 5px; /* 旧前缀 */
    cursor: pointer;

    -webkit-tap-highlight-color: transparent; /* 旧微信点击高亮去除 */
    -webkit-appearance: none;
}

.modal-simple .btn.simple {
    color: inherit;
    background: rgb(115, 118, 122);
}