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

body {
  font-family:
    system-ui,
    -apple-system,
    "Segoe UI",
    Roboto,
    "Helvetica Neue",
    sans-serif;
  line-height: 1.5;
  color: #1e2a1f;
  scroll-behavior: smooth;
  background: #2c2e1e; /* fallback earthy */
}

/* 背景图 + 浅黄色半透明蒙层 */
.bg-layer {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -2;
  background-image: url("https://images.unsplash.com/photo-1551918120-9739cb430c6d?q=80&w=2070&auto=format"); /* dynamic sports stadium crowd */
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

.bg-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  background: rgba(255, 248, 205, 0.75); /* 浅黄色半透明蒙层 */
  backdrop-filter: blur(1px);
}

/* 全局容器 */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* 渐变主题色: 暗黄色 → 绿黄色过渡 */
.gradient-bg {
  background: linear-gradient(135deg, #c9a03d 0%, #b6c42b 100%);
}

/* 头部导航 */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(30, 40, 20, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(210, 180, 80, 0.4);
  padding: 1rem 0;
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.logo {
  font-size: 1.9rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  background: linear-gradient(125deg, #f5e57a, #b9e44c);
  background-clip: text;
  -webkit-background-clip: text;
  color: transparent;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.nav-links {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
}

.nav-links a {
  color: #fef7cf;
  text-decoration: none;
  font-weight: 600;
  font-size: 1rem;
  transition: all 0.2s;
  padding: 0.3rem 0;
  border-bottom: 2px solid transparent;
}

.nav-links a:hover {
  border-bottom-color: #e4cd6b;
  color: #ffe6a3;
}

/* 通用区块样式 */
section {
  padding: 5rem 0;
  scroll-margin-top: 5rem;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 2rem;
  position: relative;
  display: inline-block;
  background: linear-gradient(125deg, #846c2c, #87a822);
  background-clip: text;
  -webkit-background-clip: text;
  color: transparent;
}

.section-title::after {
  content: "";
  position: absolute;
  bottom: -10px;
  left: 0;
  width: 60%;
  height: 4px;
  background: linear-gradient(90deg, #cfb153, #b9d44b);
  border-radius: 4px;
}

/* Banner 区域 */
.banner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.banner-content {
  flex: 1.2;
  min-width: 260px;
}

.banner-content h1 {
  font-size: 3.4rem;
  font-weight: 800;
  line-height: 1.2;
  background: linear-gradient(125deg, #ae872c, #7f9c1c);
  background-clip: text;
  -webkit-background-clip: text;
  color: transparent;
  margin-bottom: 1rem;
}

.banner-tagline {
  font-size: 1.3rem;
  color: #2c3a1f;
  margin-bottom: 1.5rem;
  font-weight: 500;
  border-left: 4px solid #e0b543;
  padding-left: 1rem;
}

.banner-desc {
  font-size: 1.05rem;
  color: #2c3a1f;
  margin-bottom: 1.8rem;
  max-width: 550px;
}

.banner-stats {
  display: flex;
  gap: 2rem;
  margin-top: 1.2rem;
}

.stat-item {
  text-align: center;
}

.stat-number {
  font-size: 2rem;
  font-weight: 800;
  color: #bc962e;
}

.stat-label {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: #495a2e;
}

.banner-media {
  flex: 0.8;
  display: flex;
  justify-content: center;
}

.phone-mock {
  background: #fef7e0;
  border-radius: 42px;
  box-shadow: 0 30px 35px -15px rgba(0, 0, 0, 0.2);
  padding: 12px 8px;
  border: 1px solid rgba(190, 150, 60, 0.4);
}

.phone-mock img {
  width: 100%;
  max-width: 280px;
  height: auto;
  border-radius: 34px;
  display: block;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
}

/* intro & features 两栏布局创意分段 */
.features-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  align-items: center;
}

.features-text {
  flex: 1.2;
}

.features-text p {
  margin-bottom: 1.5rem;
  font-size: 1.05rem;
  background: rgba(250, 245, 215, 0.65);
  padding: 1rem 1.4rem;
  border-radius: 28px;
  backdrop-filter: blur(4px);
  border-left: 6px solid #e1bc5c;
}

.feature-highlight {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin-top: 1rem;
}

.feature-card {
  background: rgba(255, 252, 225, 0.8);
  backdrop-filter: blur(5px);
  border-radius: 32px;
  padding: 1.2rem 1.4rem;
  flex: 1;
  min-width: 160px;
  transition: 0.2s;
  border: 1px solid #e7d98c;
}

.feature-card h4 {
  font-size: 1.25rem;
  margin-bottom: 0.6rem;
  color: #7f621d;
}

.feature-card p {
  font-size: 0.9rem;
  margin: 0;
  background: transparent;
  padding: 0;
  border-left: none;
}

.features-image {
  flex: 0.9;
  display: flex;
  justify-content: center;
}

.app-screen-img {
  width: 100%;
  max-width: 320px;
  border-radius: 44px;
  box-shadow: 0 25px 35px -12px rgba(0, 0, 0, 0.25);
  border: 6px solid #faf1cf;
}

/* screenshot 可选区域 (展示社区交互竖屏截图) */
.screenshot-section {
  background: rgba(242, 232, 186, 0.3);
  border-radius: 64px;
  margin: 1rem auto;
  backdrop-filter: blur(2px);
}

.screenshot-gallery {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 2rem;
  margin-top: 2rem;
}

.screenshot-card {
  background: #fffef5;
  border-radius: 36px;
  padding: 1rem;
  width: 210px;
  text-align: center;
  transition: transform 0.25s ease;
  box-shadow: 0 12px 18px -10px rgba(0, 0, 0, 0.1);
}

.screenshot-card:hover {
  transform: translateY(-5px);
}

.screenshot-card img {
  width: 100%;
  border-radius: 28px;
  box-shadow: 0 6px 12px rgba(0, 0, 0, 0.05);
}

.screenshot-card p {
  margin: 0.8rem auto;
  text-align: center;
  font-weight: 500;
  color: #6e571f;
}

/* 页脚 */
footer {
  background: rgba(20, 25, 12, 0.85);
  backdrop-filter: blur(8px);
  color: #f5e9c4;
  padding: 2.5rem 0 1.8rem;
  border-top: 1px solid #cbae64;
}

.footer-content {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1.5rem;
}

.footer-info {
  text-align: left;
}

.footer-email {
  font-size: 1rem;
  margin-bottom: 0.5rem;
}

.footer-email a {
  color: #ffea9e;
  text-decoration: none;
  border-bottom: 1px dotted;
}

.copyright {
  font-size: 0.75rem;
  opacity: 0.8;
}

.footer-nav a {
  color: #f5e1a0;
  text-decoration: none;
  margin: 0 0.8rem;
  font-size: 0.85rem;
}

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

/* 响应式 */
@media (max-width: 800px) {
  .container {
    padding: 0 1.5rem;
  }
  .banner-content h1 {
    font-size: 2.3rem;
  }
  .section-title {
    font-size: 2rem;
  }
  .nav-container {
    flex-direction: column;
    align-items: flex-start;
  }
  .nav-links {
    gap: 1.2rem;
  }
  .features-grid,
  .banner {
    flex-direction: column;
  }
  .features-image,
  .banner-media {
    order: -1;
  }
  .banner-stats {
    justify-content: space-between;
  }
  .footer-content {
    flex-direction: column;
    text-align: center;
  }
  .footer-nav {
    margin-top: 0.5rem;
  }
}

@media (max-width: 480px) {
  section {
    padding: 3rem 0;
  }
  .feature-card {
    min-width: 100%;
  }
  .screenshot-card {
    width: 160px;
  }
}

button,
a {
  cursor: pointer;
}
/* 无download按钮，所有交互仅为导航跳转 */
.no-download {
  user-select: none;
}