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

body {
  line-height: 1.6;
  color: #333;
  overflow-x: hidden;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* 微信浏览器提示 */
.wechat-tip {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.8);
  z-index: 9999;
  display: none;
  align-items: flex-start;
  justify-content: flex-end;
  padding: 20px;
}

.wechat-tip-content {
  background: white;
  padding: 20px;
  border-radius: 10px;
  width: 200px;
  text-align: center;
  position: absolute;
  top: 20px;
  right: 20px;
  font-size: 16px; 
  font-weight: bold;
}

.wechat-tip-content p {
  color: #666; 
  font-size: 14px; 
  font-weight: normal;
  margin-top: 10px;
}

.wechat-tip-content::before {
  content: "";
  position: absolute;
  top: -8px;
  right: 15px;
  width: 0;
  height: 0;
  border-left: 10px solid transparent;
  border-right: 10px solid transparent;
  border-bottom: 10px solid white;
}

.close-tip {
  background: #3498db;
  color: white;
  border: none;
  padding: 10px 20px;
  border-radius: 20px;
  margin-top: 15px;
  cursor: pointer;
}

/* 头部 */
.header {
  background: #a2e9f5;
  backdrop-filter: blur(10px);
  padding: 20px 0;
  position: sticky;
  top: 0;
  z-index: 1000;
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
}

.logo {
  display: flex;
  align-items: center;
  color: #fe6e65;
  font-size: 24px;
  font-weight: bold;
}

.logo img {
  width: 40px;
  height: 40px;
  margin-right: 10px;
  border-radius: 8px;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 30px;
}

.nav-menu a {
  color: #fe6e65;
  text-decoration: none;
  font-weight: bold;
  font-size: 18px;
  transition: opacity 0.3s;
}

.nav-menu a:hover {
  opacity: 0.8;
}

/* 主要内容区域 */
.main-content {
  background: white;
  margin-top: 0;
}

/* 应用介绍 */
.intro {
  background: rgb(253 251 235);
  color: #000;
  padding: 50px 0;
  text-align: center;
}

.intro p {
  font-size: 1rem;
  margin-top: 10px;
  margin-bottom: 10px;
}

.intro h3 {
  font-weight: bold;
  font-size: 1.5rem;
}

.app-preview {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 50px;
  margin: 50px 0px 50px 0px;
  flex-wrap: wrap;
}

.phone-mockup {
  width: 300px;
  height: 500px;
  background: #333;
  border-radius: 15px;
  padding: 20px;
  position: relative;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.phone-screen {
  width: 100%;
  height: 100%;
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.phone-screen img {
  width: 100%;
  height: auto;
}

.intro-section {
  display: flex;
  flex-direction: column;
  gap: 20px;
  align-items: center;
}

.desc-section {
  max-width: 360px;
  text-align: left;
}

.download-buttons {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  justify-content: center;
  flex-direction: column;
  align-items: center;
}
.download-buttons a{
  min-width: 220px;
}

.download-btn {
  display: inline-flex;
  align-items: center;
  padding: 15px 30px;
  background: #3498db;
  color: #fff;
  border: 2px solid white;
  border-radius: 50px;
  text-decoration: none;
  font-size: 24px;
  transition: all 0.3s;
  backdrop-filter: blur(10px);
}

.download-btn:hover {
  background: #a2e9f5;
  color: #3498db;
  transform: translateY(-2px);
}

.download-btn svg {
  width: 40px;
  height: 40px;
  margin-right: 10px;
}

.qr-section {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-top: 30px;
  width: 360px;
}

.qr-code {
  width: 120px;
  height: 120px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.qr-code img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 功能亮点 */
.features {
  padding: 50px 0;
  background: white;
}

.section-title {
  text-align: center;
  font-size: 2.5rem;
  margin-bottom: 60px;
  color: #2c3e50;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 40px;
}

.feature-card {
  background: #f8f9fa;
  padding: 20px;
  border-radius: 20px;
  text-align: center;
  transition: transform 0.3s, box-shadow 0.3s;
}

.feature-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
}

.feature-icon {
  width: 80px;
  background: linear-gradient(135deg, #667eea, #764ba2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  color: white;
  font-size: 2rem;
}

.feature-card h3 {
  font-size: 1.5rem;
  margin-bottom: 10px;
  color: #2c3e50;
}

.feature-card p {
  color: #666;
  text-align: left;
  line-height: 1.6;
}

/* 用户评价 */
.reviews {
  padding: 50px 0;
}

.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 30px;
}

.review-card {
  background: white;
  padding: 30px;
  border-radius: 20px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.review-header {
  display: flex;
  align-items: center;
  margin-bottom: 20px;
}

.review-avatar {
  width: 50px;
  height: 50px;
  background: linear-gradient(135deg, #667eea, #764ba2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: bold;
  margin-right: 15px;
}

.review-info h4 {
  color: #2c3e50;
  margin-bottom: 5px;
}

.review-stars {
  color: #aaa;
}

.review-text {
  color: #666;
  line-height: 1.6;
  font-style: italic;
}

/* 联系我们 */
.contact {
  padding: 50px 0;
}

.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  background-color: #f7f7f7;
}

.contact-info {
  padding: 40px;
}
.contact-info img {
  width: 40%;
}
.contact-info p {
  margin-left: 20px;
}
.contact-info h2 {
  font-size: 2.5rem;
  margin-bottom: 30px;
}

.contact-item {
  display: flex;
  align-items: center;
  margin-bottom: 20px;
}

.contact-item svg {
  width: 24px;
  height: 24px;
  margin-right: 15px;
}

.contact-form {
  padding: 40px;
  border-radius: 20px;
  backdrop-filter: blur(10px);
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  margin-bottom: 5px;
  font-weight: 500;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 15px;
  border: solid 1px #ccc;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.9);
  color: #333;
}

.form-group textarea {
  height: 120px;
  border: solid 1px #ccc;
  resize: vertical;
}

.submit-btn {
  background: #3498db;
  color: white;
  border: none;
  padding: 15px 30px;
  border-radius: 50px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s;
  width: 100%;
}

.submit-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

/* 页脚 */
.footer {
  width: 100%;
  background: #2c3e50;
  color: white;
  text-align: center;
  font-size: 12px;
  padding: 20px;
  line-height: 25px;
}

.footer a {
  color: white;
  margin: 5px;
}

.social-links {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-top: 20px;
}

.social-links a {
  color: white;
  font-size: 1.5rem;
  transition: color 0.3s;
}

.social-links a:hover {
  color: #667eea;
}

/* 响应式设计 */
@media (max-width: 767px) {
  .container {
    padding: 0 15px;
  }

  .nav {
    flex-direction: column;
    gap: 15px;
  }

  .nav-menu {
    gap: 20px;
  }

  .intro h1 {
    font-size: 2.5rem;
  }

  .intro p {
    font-size: 1.1rem;
  }

  .app-preview {
    flex-direction: column;
  }

  .download-buttons {
    flex-direction: column;
    width: 100%;
  }

  .download-btn {
    justify-content: center;
    width: 100%;
    max-width: 280px;
  }

  .qr-section {
    flex-direction: column;
    text-align: center;
  }

  .contact-content {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .features-grid {
    grid-template-columns: 1fr;
  }

  .reviews-grid {
    grid-template-columns: 1fr;
  }

  .section-title {
    font-size: 2rem;
  }

  .contact-info h2 {
    font-size: 2rem;
  }

  .contact-info {
    padding: 30px;
  }
  .contact-form {
    padding: 30px;
  }
}

@media (max-width: 480px) {
  .intro h1 {
    font-size: 2rem;
  }

  .nav-menu a {
    font-size: 16px;
  }

  .section-title {
    font-size: 1.8rem;
  }

  .feature-card,
  .review-card {
    padding: 25px 20px;
  }

  .contact-info {
    padding: 20px;
  }
  .contact-form {
    padding: 20px;
  }
}

/* 动画效果 */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in-up {
  animation: fadeInUp 0.6s ease-out;
}

.fade-in-up img {
  max-width: 80%;
}

/* 滚动效果 */
.scroll-reveal {
  opacity: 0;
  transform: translateY(50px);
  transition: all 0.6s ease-out;
}

.scroll-reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}