:root {
  --primary: #e63946;
  --primary-hover: #d62828;
  --bg-dark: #121212;
  --bg-card: #1e1e1e;
  --text-main: #f1f1f1;
  --text-muted: #a0a0a0;
  --border: #333;
  --radius-md: 12px;
  --radius-lg: 20px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background-color: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* Header */
.header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(18, 18, 18, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
.brand { display: flex; align-items: center; gap: 12px; font-size: 20px; font-weight: bold; }
.brand img { height: 32px; width: auto; border-radius: 6px; }
.nav-links { display: none; gap: 24px; font-size: 15px; color: var(--text-muted); }
.nav-links a:hover { color: var(--primary); }
.btn-download {
  background: var(--primary); color: #fff; padding: 8px 20px;
  border-radius: 24px; font-weight: 500; font-size: 15px;
  transition: background 0.2s;
}
.btn-download:hover { background: var(--primary-hover); }

/* Hero */
.hero { padding: 60px 0; display: flex; flex-direction: column; gap: 40px; }
.hero-content { text-align: center; }
.hero h1 { font-size: 32px; line-height: 1.3; margin-bottom: 16px; }
.hero p { color: var(--text-muted); font-size: 16px; margin-bottom: 32px; max-width: 600px; margin-inline: auto; }
.hero-actions { display: flex; justify-content: center; gap: 16px; }
.btn-large { padding: 14px 32px; font-size: 17px; border-radius: 30px; }
.hero-visual { position: relative; display: flex; justify-content: center; align-items: center; }
.hero-device {
  width: 100%; max-width: 320px; aspect-ratio: 9/16;
  background: #000; border-radius: 32px; border: 8px solid #333;
  overflow: hidden; box-shadow: 0 20px 40px rgba(0,0,0,0.5);
  position: relative; z-index: 2;
}
.hero-device img { width: 100%; height: 100%; object-fit: cover; }
.hero-bg-glow {
  position: absolute; width: 80%; height: 80%;
  background: radial-gradient(circle, rgba(230,57,70,0.3) 0%, transparent 70%);
  filter: blur(40px); z-index: 1;
}

/* Sections Base */
.section { padding: 60px 0; }
.section-header { margin-bottom: 32px; }
.section-header h2 { font-size: 24px; margin-bottom: 8px; }
.section-header p { color: var(--text-muted); font-size: 15px; }

/* Grid Layouts */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.grid-3 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.grid-scroll {
  display: flex; gap: 16px; overflow-x: auto; padding-bottom: 12px;
  scrollbar-width: none;
}
.grid-scroll::-webkit-scrollbar { display: none; }
.grid-scroll .card { flex: 0 0 160px; }

/* Cards */
.card {
  background: var(--bg-card); border-radius: var(--radius-md);
  overflow: hidden; border: 1px solid rgba(255,255,255,0.05);
}
.card-img { width: 100%; aspect-ratio: 3/4; object-fit: cover; display: block; }
.card-info { padding: 12px; }
.card-info h3 { font-size: 15px; margin-bottom: 4px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.card-info p { font-size: 12px; color: var(--text-muted); }

/* Feature Blocks */
.feature-list { display: flex; flex-direction: column; gap: 32px; }
.feature-item { display: flex; flex-direction: column; gap: 20px; align-items: center; }
.feature-item img { width: 100%; max-width: 280px; border-radius: var(--radius-md); object-fit: cover; aspect-ratio: 3/4; }
.feature-text h3 { font-size: 20px; margin-bottom: 12px; color: var(--primary); }
.feature-text p { color: var(--text-muted); font-size: 15px; line-height: 1.7; }

/* FAQ */
.faq-list { display: flex; flex-direction: column; gap: 12px; }
.faq-item { background: var(--bg-card); padding: 20px; border-radius: var(--radius-md); }
.faq-item h3 { font-size: 16px; margin-bottom: 8px; }
.faq-item p { font-size: 14px; color: var(--text-muted); }

/* Footer */
.footer { border-top: 1px solid var(--border); padding: 40px 0; text-align: center; color: var(--text-muted); font-size: 13px; }
.footer-links { margin-bottom: 16px; display: flex; justify-content: center; gap: 20px; }
.footer-links a:hover { color: var(--text-main); }
.time-info { margin-top: 12px; font-size: 12px; color: #666; }

/* Responsive */
@media (min-width: 768px) {
  .nav-links { display: flex; }
  .hero { flex-direction: row; align-items: center; text-align: left; padding: 80px 0; }
  .hero-content { flex: 1; text-align: left; }
  .hero p { margin-inline: 0; }
  .hero-actions { justify-content: flex-start; }
  .hero-visual { flex: 1; }
  .hero h1 { font-size: 40px; }
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
  .grid-scroll .card { flex: 0 0 200px; }
  .feature-item { flex-direction: row; gap: 40px; }
  .feature-item:nth-child(even) { flex-direction: row-reverse; }
  .feature-item img { width: 40%; max-width: none; }
  .feature-text { flex: 1; }
}

@media (min-width: 1024px) {
  .section { padding: 80px 0; }
  .hero h1 { font-size: 48px; }
  .grid-3 { grid-template-columns: repeat(4, 1fr); }
  .grid-scroll { display: grid; grid-template-columns: repeat(5, 1fr); overflow: visible; }
  .grid-scroll .card { flex: none; }
  .grid-2 { grid-template-columns: repeat(3, 1fr); }
}