:root {
  --bg-dark: #0f0c16;
  --bg-gradient: linear-gradient(135deg, #1a1025 0%, #0d0913 100%);
  --primary: #e11d48;
  --primary-hover: #be123c;
  --secondary: #f59e0b;
  --text-main: #f3f4f6;
  --text-muted: #9ca3af;
  --card-bg: rgba(255, 255, 255, 0.05);
  --card-border: rgba(255, 255, 255, 0.1);
  --radius: 12px;
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

body {
  font-family: var(--font-family);
  background: var(--bg-dark);
  background-image: var(--bg-gradient);
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
}

a {
  text-decoration: none;
  color: inherit;
}

img {
  max-width: 100%;
  display: block;
}

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(15, 12, 22, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--card-border);
}
.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
}
.brand img {
  height: 32px;
  width: auto;
  border-radius: 6px;
}
.brand-name {
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: 1px;
}
.nav-menu {
  display: none;
  gap: 20px;
}
.nav-menu a {
  color: var(--text-muted);
  font-size: 0.95rem;
  transition: color 0.3s;
}
.nav-menu a:hover {
  color: var(--text-main);
}
.nav-toggle {
  background: none;
  border: none;
  color: var(--text-main);
  font-size: 1.5rem;
  cursor: pointer;
}

/* Section Common */
section {
  padding: 60px 20px;
  max-width: 1200px;
  margin: 0 auto;
}
.section-title {
  text-align: center;
  font-size: 1.8rem;
  margin-bottom: 30px;
  color: var(--text-main);
}
.section-title span {
  color: var(--primary);
}
.section-subtitle {
  text-align: center;
  color: var(--text-muted);
  margin-top: -20px;
  margin-bottom: 40px;
  font-size: 0.95rem;
}

/* HERO */
.hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 80px 20px 60px;
  position: relative;
  overflow: hidden;
}
.hero-bg-glow {
  position: absolute;
  top: -20%;
  left: 50%;
  transform: translateX(-50%);
  width: 80vw;
  height: 80vw;
  background: radial-gradient(circle, rgba(225, 29, 72, 0.15) 0%, transparent 60%);
  z-index: -1;
  pointer-events: none;
}
.hero h1 {
  font-size: 2rem;
  line-height: 1.3;
  margin-bottom: 16px;
  max-width: 800px;
}
.hero h1 span {
  color: var(--primary);
}
.hero p {
  color: var(--text-muted);
  font-size: 1.1rem;
  max-width: 600px;
  margin-bottom: 40px;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px;
  width: 100%;
}
.btn-download {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 32px;
  border-radius: 50px;
  font-size: 1rem;
  font-weight: 600;
  transition: all 0.3s;
  min-width: 200px;
}
.btn-android {
  background: #10b981;
  color: #fff;
  box-shadow: 0 4px 15px rgba(16, 185, 129, 0.3);
}
.btn-android:hover {
  background: #059669;
  transform: translateY(-2px);
}
.btn-ios {
  background: var(--text-main);
  color: #0f0c16;
  box-shadow: 0 4px 15px rgba(255, 255, 255, 0.2);
}
.btn-ios:hover {
  background: #e5e7eb;
  transform: translateY(-2px);
}

/* AI Short Drama */
.ai-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}
.ai-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: transform 0.3s;
}
.ai-card:hover {
  transform: translateY(-4px);
}
.ai-card h3 {
  font-size: 1.2rem;
  color: var(--secondary);
}
.ai-card p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* Hot Shorts */
.shorts-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}
.short-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--card-border);
  display: flex;
  flex-direction: column;
}
.short-card img {
  width: 100%;
  aspect-ratio: 3/4;
  object-fit: cover;
  transition: transform 0.3s;
}
.short-card:hover img {
  transform: scale(1.05);
}
.short-info {
  padding: 16px;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.short-info h3 {
  font-size: 1.1rem;
  margin-bottom: 6px;
}
.short-info p {
  color: var(--text-muted);
  font-size: 0.85rem;
  line-height: 1.5;
  margin-bottom: 12px;
  flex: 1;
}
.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.tag {
  background: rgba(225, 29, 72, 0.15);
  color: var(--primary);
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
}

/* Installation Steps */
.steps-container {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.step-item {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  gap: 16px;
  align-items: flex-start;
}
.step-num {
  width: 32px;
  height: 32px;
  background: var(--primary);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  flex-shrink: 0;
}
.step-content h3 {
  font-size: 1.1rem;
  margin-bottom: 6px;
}
.step-content p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* FAQ */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.faq-item {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 20px;
}
.faq-item h3 {
  font-size: 1.05rem;
  margin-bottom: 8px;
  color: var(--secondary);
}
.faq-item p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* Reviews */
.reviews-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}
.review-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 20px;
}
.review-stars {
  color: var(--secondary);
  font-size: 1rem;
  margin-bottom: 8px;
}
.review-text {
  font-size: 0.95rem;
  margin-bottom: 12px;
}
.review-author {
  color: var(--text-muted);
  font-size: 0.85rem;
  text-align: right;
}

/* Security & Creator */
.two-col {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}
.info-block {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 24px;
}
.info-block h3 {
  font-size: 1.2rem;
  margin-bottom: 16px;
  color: var(--primary);
}
.info-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.info-list li {
  display: flex;
  gap: 10px;
  font-size: 0.95rem;
  color: var(--text-muted);
}
.info-list li::before {
  content: "•";
  color: var(--primary);
  font-weight: bold;
}

/* Bottom Download */
.bottom-download {
  text-align: center;
  background: linear-gradient(180deg, rgba(225, 29, 72, 0.1) 0%, transparent 100%);
  border-top: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 60px 20px;
  margin-top: 40px;
}
.bottom-download h2 {
  margin-bottom: 16px;
}
.bottom-download p {
  color: var(--text-muted);
  margin-bottom: 30px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* Footer */
.footer {
  text-align: center;
  padding: 40px 20px;
  font-size: 0.8rem;
  color: var(--text-muted);
  border-top: 1px solid var(--card-border);
  background: rgba(0,0,0,0.3);
}
.footer p {
  margin-bottom: 8px;
}
.footer a {
  color: var(--text-muted);
  text-decoration: underline;
}

/* Media Queries */
@media (min-width: 768px) {
  .nav-toggle { display: none; }
  .nav-menu { display: flex; }
  
  .hero h1 { font-size: 2.8rem; }
  .hero p { font-size: 1.2rem; }
  .hero-actions { gap: 24px; }
  
  .ai-grid { grid-template-columns: repeat(2, 1fr); }
  .shorts-grid { grid-template-columns: repeat(3, 1fr); }
  .steps-container { flex-direction: row; flex-wrap: wrap; }
  .step-item { flex: 1 1 calc(50% - 20px); }
  .reviews-grid { grid-template-columns: repeat(2, 1fr); }
  .two-col { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
  .hero h1 { font-size: 3.2rem; }
  .ai-grid { grid-template-columns: repeat(3, 1fr); }
  .shorts-grid { grid-template-columns: repeat(4, 1fr); }
  .step-item { flex: 1 1 calc(33.333% - 20px); }
  .reviews-grid { grid-template-columns: repeat(3, 1fr); }
}