/* ===== 全局样式 ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
  font-family: "Helvetica Neue", Arial, sans-serif;
  background: #f5f5f5;
  color: #333;
  overflow-x: hidden;
  position: relative;
}
img {
  max-width: 100%;
  display: block;
}
a {
  text-decoration: none;
  color: inherit;
}
button {
  cursor: pointer;
  border: none;
  outline: none;
}

/* ===== 顶部导航 ===== */
.mobile-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 60px;
  background-color: #1595f8;
  color: #fff;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 16px;
  z-index: 100;
}
.mobile-logo {
  font-size: 18px;
  font-weight: bold;
}
.menu-toggle {
  width: 28px;
  height: 22px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  cursor: pointer;
}
.menu-toggle span {
  display: block;
  height: 3px;
  width: 100%;
  background-color: #fff;
  border-radius: 2px;
  transition: all 0.3s;
}
.menu-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}
.menu-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}
.mobile-nav {
  display: none;
  position: absolute;
  top: 60px;
  right: 0;
  width: 160px;
  background: rgba(0, 0, 0, 0.95);
  border-radius: 8px;
  flex-direction: column;
  text-align: center;
  padding: 10px 0;
  z-index: 99;
}
.mobile-nav a {
  color: #fff;
  padding: 12px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}
.mobile-nav a:last-child {
  border-bottom: none;
}
.mobile-nav.active {
  display: flex;
  animation: fadeIn 0.3s ease forwards;
}
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===== 主内容 ===== */
.mobile-main {
  margin-top: 60px;
  padding: 16px;
  padding-bottom: 50px;
  display: flex;
  flex-direction: column;
  gap: 40px;
}
.section {
  background: rgba(255, 255, 255, 0.9);
  padding: 16px;
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
  text-align: center;
}
.section h2 {
  font-size: 20px;
  margin-bottom: 12px;
  color: #111;
}
.section p {
  font-size: 14px;
  margin-bottom: 16px;
  color: #555;
  line-height: 1.5;
}
.section img {
  border-radius: 8px;
  margin-bottom: 12px;
}
.btn {
  display: inline-block;
  background-color: #1595f8;
  color: #fff;
  padding: 10px 24px;
  border-radius: 24px;
  font-size: 15px;
  transition: all 0.3s;
}
.btn:hover {
  background-color: #107ed6;
}

/* ===== 功能模块 ===== */
.feature-item {
  margin-bottom: 24px;
  text-align: left;
}
.feature-item img {
  width: 100%;
  border-radius: 12px;
  margin-bottom: 12px;
}
.feature-title {
  font-weight: bold;
  font-size: 16px;
  margin-bottom: 6px;
  color: #1595f8;
}
.feature-desc {
  font-size: 14px;
  color: #555;
  line-height: 1.4;
}

/* ===== 用户评价 ===== */
.reviews {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.review-item {
  background: #f0f8ff;
  border-radius: 12px;
  padding: 12px;
}
.review-item .name {
  font-weight: bold;
  font-size: 15px;
  margin-bottom: 4px;
}
.review-item .role {
  font-size: 13px;
  color: #555;
  margin-bottom: 8px;
}
.review-item .comment {
  font-size: 14px;
  color: #333;
  line-height: 1.5;
}

/* ===== 底部 ===== */
.mobile-footer {
  text-align: center;
  padding: 16px 0;
  font-size: 13px;
  color: #777;
  border-top: 1px solid #e0e0e0;
}