@import url("https://fonts.googleapis.com/css2?family=Inter:wght@400;600;700&display=swap");

:root {
  --primary: #0046cc;
  --text-main: #333333;
  --text-light: #666666;
  --bg-light: #f8fafc;
  --white: #ffffff;
}

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

body {
  font-family:
    "Inter",
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    Roboto,
    sans-serif;
  background-color: var(--bg-light);
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
}

.container {
  width: 100%;
  padding: 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-bottom: 120px; /* 为悬浮按钮留出空间 */
}

header {
  margin-top: 20px;
  margin-bottom: 40px;
  text-align: center;
}

.logo {
  width: 150px;
}

.content {
  text-align: center;
  margin-bottom: 20px;
}

.title {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--primary);
}

.sub-title {
  font-size: 16px;
  color: var(--text-light);
  font-weight: 400;
}

.hero-image {
  width: 100%;
  max-width: 400px;
  margin: 20px 0;
  animation: fadeInUp 1s ease-out;
}

.hero-image img {
  width: 100%;
  height: auto;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fixed-bottom {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  padding: 20px;
  display: flex;
  justify-content: center;
  gap: 15px;
  box-shadow: 0 -4px 15px rgba(0, 0, 0, 0.05);
  z-index: 1000;
}

.btn-download {
  height: 50px;
  display: flex;
  align-items: center;
  transition: transform 0.2s;
}

.btn-download:active {
  transform: scale(0.95);
}

.btn-download img {
  height: 100%;
  width: auto;
  border-radius: 8px;
}