:root {
  --bg-dark: #09090b;
  --card-bg: rgba(15, 23, 42, 0.45);
  --card-border: rgba(255, 255, 255, 0.08);
  --text-main: #f4f4f5;
  --text-muted: #a1a1aa;
  --accent-color: #f59e0b;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--bg-dark);
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 20px;
  overflow-x: hidden;
  position: relative;
}

/* 背景模糊亮光效果 */
.glow-bg {
  position: absolute;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(245, 158, 11, 0.15) 0%, rgba(239, 68, 68, 0.05) 50%, rgba(0,0,0,0) 70%);
  top: -100px;
  right: -100px;
  z-index: 0;
  pointer-events: none;
}

.container {
  background: var(--card-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--card-border);
  border-radius: 24px;
  padding: 48px 40px;
  width: 100%;
  max-width: 440px;
  box-shadow: 0 30px 60px -15px rgba(0, 0, 0, 0.8),
              inset 0 1px 0 rgba(255, 255, 255, 0.05);
  z-index: 1;
  animation: fadeIn 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.logo-area {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  margin-bottom: 40px;
}

.logo-icon {
  width: 68px;
  height: 68px;
  margin-bottom: 20px;
  filter: drop-shadow(0 0 15px rgba(245, 158, 11, 0.4));
}

.logo-icon svg {
  width: 100%;
  height: 100%;
}

h1 {
  font-family: 'Outfit', sans-serif;
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 10px;
  background: linear-gradient(to bottom, #ffffff 30%, #a1a1aa 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.subtitle {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
  max-width: 280px;
}

.download-section {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 32px;
}

.section-title {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--text-muted);
  margin-bottom: 6px;
  text-align: left;
}

.download-btn {
  display: flex;
  align-items: center;
  padding: 16px 20px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 16px;
  color: var(--text-main);
  text-decoration: none;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  overflow: hidden;
}

.download-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.1), rgba(239, 68, 68, 0.1));
  opacity: 0;
  transition: opacity 0.25s ease;
  z-index: 0;
}

.download-btn:hover {
  transform: translateY(-2px);
  border-color: rgba(245, 158, 11, 0.3);
  box-shadow: 0 10px 20px -5px rgba(245, 158, 11, 0.1),
              0 0 0 1px rgba(245, 158, 11, 0.2);
}

.download-btn:hover::before {
  opacity: 1;
}

.download-btn:active {
  transform: translateY(0);
}

.btn-icon {
  width: 24px;
  height: 24px;
  color: var(--text-main);
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

.btn-icon svg {
  width: 100%;
  height: 100%;
}

.btn-text {
  display: flex;
  flex-direction: column;
  margin-left: 16px;
  text-align: left;
  z-index: 1;
}

.btn-desc {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  margin-bottom: 2px;
}

.btn-title {
  font-size: 15px;
  font-weight: 600;
}

.chevron {
  margin-left: auto;
  color: var(--text-muted);
  width: 16px;
  height: 16px;
  z-index: 1;
  transition: transform 0.25s ease;
}

.download-btn:hover .chevron {
  transform: translateX(4px);
  color: var(--accent-color);
}

.footer {
  text-align: center;
}

.footer p {
  font-size: 11px;
  color: var(--text-muted);
  opacity: 0.6;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(15px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 480px) {
  .container {
    padding: 40px 24px;
    border-radius: 20px;
  }
}