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

body {
  font-family: -apple-system, BlinkMacSystemFont, "微软雅黑";
  background: #f6f7fb;
  color: #222;
}

.container {
  max-width: 750px;
  margin: auto;
  padding: 15px;
}

/* 顶部导航 */
.top-nav {
  display: flex;
  justify-content: space-around;
  background: #fff;
  padding: 12px;
  border-radius: 14px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
  margin-bottom: 15px;
}
.top-nav a {
  text-decoration: none;
  color: #4b5563;
  font-size: 13px;
}

/* 头部LOGO呼吸特效 */
.header {
  text-align: center;
  padding: 18px 0;
  background: #fff;
  border-radius: 14px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
  margin-bottom: 15px;
}
.logo-wrap {
  width: 64px;
  height: 64px;
  margin: 0 auto 10px;
  position: relative;
  border-radius: 50%;
  overflow: hidden;
}
.logo-img {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
  position: relative;
  z-index: 2;
}
.logo-glow {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: #3498db;
  opacity: 0.4;
  animation: breath 2s infinite ease-in-out;
  z-index: 1;
}
@keyframes breath {
  0% {
    transform: scale(1);
    opacity: 0.5;
  }
  50% {
    transform: scale(1.2);
    opacity: 0.2;
  }
  100% {
    transform: scale(1);
    opacity: 0.5;
  }
}

h1 {
  font-size: 18px;
  color: #222;
  margin: 8px 0;
}
.invite-box {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-top: 10px;
}
.copy-btn {
  background: #3498db;
  color: #fff;
  border: none;
  border-radius: 6px;
  padding: 4px 10px;
  cursor: pointer;
}

/* 卡片UI */
.section-card {
  background: #fff;
  margin-bottom: 15px;
  padding: 16px;
  border-radius: 14px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.04);
}
h2 {
  font-size: 16px;
  border-left: 4px solid #3498db;
  padding-left: 8px;
  margin-bottom: 10px;
}
.download-btn {
  display: block;
  background: #3498db;
  color: #fff;
  text-align: center;
  padding: 14px;
  border-radius: 10px;
  text-decoration: none;
  margin-top: 10px;
}
.tutorial-list a {
  display: block;
  padding: 8px 0;
  border-bottom: 1px solid #eee;
  color: #333;
  text-decoration: none;
}
.faq-box details {
  padding: 8px 0;
  border-bottom: 1px solid #eee;
}
.faq-box summary {
  cursor: pointer;
  font-weight: bold;
  list-style: none;
}

footer {
  text-align: center;
  font-size: 12px;
  color: #999;
  padding: 10px 0;
}
.toast {
  position: fixed;
  bottom: 80px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0, 0, 0, 0.75);
  color: #fff;
  padding: 6px 18px;
  border-radius: 20px;
  font-size: 13px;
  display: none;
  z-index: 999;
}

/* 三张图横排 */
.three-img-row {
  display: flex;
  gap: 6px;
  justify-content: center;
  width: 100%;
}
.three-img-row img {
  max-width: 30%;
  height: auto;
  border-radius: 8px;
  background: none;
}

/* 数据统计一行三列 */
.stats-row {
  display: flex;
  justify-content: space-around;
  text-align: center;
  margin: 10px 0;
}
.stats-row .stat-num {
  font-size: 26px;
  font-weight: bold;
  color: #3498db;
  display: block;
}
.stats-row .stat-label {
  font-size: 14px;
  color: #666;
  display: block;
  margin-top: 4px;
}

/* 特性文字居中 */
.feature-desc {
  text-align: center;
  font-size: 13px;
  color: #666;
  margin-bottom: 10px;
}

/* 双按钮横排容器 */
.btn-row-flex {
  display: flex;
  gap: 10px;
}
.btn-row-flex .download-btn {
  flex: 1;
  margin-top: 0;
}
.btn-row-flex .btn-gray {
  background: #94a3b8;
}

/* 渐变获取激活码卡片 */
.kami-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  border-radius: 12px;
  background: linear-gradient(90deg, #3498db, #9b59b6);
  color: #fff;
  text-decoration: none;
  margin-top: 10px;
}
.kami-left {
  display: flex;
  align-items: center;
  gap: 10px;
}
.kami-icon {
  font-size: 18px;
}
.kami-text {
  text-align: left;
}
.kami-title {
  font-size: 15px;
}
.kami-subtitle {
  font-size: 12px;
  opacity: 0.9;
}
.kami-arrow {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: #fff;
  color: #3498db;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
}

/* 客服中心专用样式 无重复 */
.subtitle {
  font-size: 13px;
  color: #666;
  margin-top: 5px;
}
.customer-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.customer-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px;
  background: #f9fafc;
  border-radius: 10px;
  text-decoration: none;
  color: #222;
}
.customer-left {
  display: flex;
  align-items: center;
  gap: 10px;
}
.customer-icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: #3498db;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 18px;
}
.customer-info h3 {
  font-size: 15px;
  margin: 0;
}
.customer-info p {
  font-size: 12px;
  color: #666;
  margin: 2px 0 0;
}
.customer-arrow {
  color: #999;
}
.online-btn {
  background: linear-gradient(90deg, #3498db, #2980b9);
  color: #fff;
}
.online-btn .customer-icon {
  background: #fff;
  color: #3498db;
}
.news-card {
  background: #fff;
  margin-bottom: 15px;
  padding: 16px;
  border-radius: 14px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
}
.news-title {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 16px;
  font-weight: bold;
  color: #333;
  margin-bottom: 10px;
}
.news-title .horn-icon {
  font-size: 18px;
  color: #e74c3c;
}
.news-content {
  font-size: 13px;
  color: #666;
  line-height: 1.6;
}