:root {
  --primary: #FF6B35;
  --secondary: #4ECDC4;
  --accent: #FFD93D;
  --dark: #0a0f1a;
  --darker: #05070c;
  --card-bg: rgba(20, 28, 45, 0.85);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  background-color: var(--dark);
  color: #fff;
  overflow-x: hidden;
}

.header-scrolled {
  background: rgba(10, 15, 26, 0.95) !important;
  backdrop-filter: blur(12px);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.page-hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 6rem 0 4rem;
  background: linear-gradient(135deg, #1a0f2e 0%, #0d1f1c 50%, #1a1209 100%);
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('https://filetx.3633yx.com/250419-a3815af0f2d94afca5685f7c77ab96a5.jpeg') center/cover no-repeat;
  opacity: 0.35;
}

.page-hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 30% 50%, rgba(255, 107, 53, 0.25) 0%, transparent 50%),
              radial-gradient(circle at 70% 80%, rgba(78, 205, 196, 0.2) 0%, transparent 45%);
}

.hero-content {
  position: relative;
  z-index: 10;
  text-align: center;
}

.hero-logo {
  height: clamp(100px, 22vw, 180px);
  width: auto;
  filter: drop-shadow(0 10px 30px rgba(0, 0, 0, 0.5));
  animation: float 3s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

.hero-title {
  font-size: clamp(2.5rem, 7vw, 5rem);
  margin-top: 1.5rem;
  margin-bottom: 1rem;
  text-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
  letter-spacing: 0.05em;
}

.hero-subtitle {
  font-size: clamp(1rem, 2.5vw, 1.35rem);
  color: rgba(255, 255, 255, 0.85);
  max-width: 800px;
  margin: 0 auto 2rem;
  line-height: 1.7;
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
  margin-bottom: 2.5rem;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 1rem;
  border-radius: 9999px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  font-size: 0.875rem;
  color: #fff;
  backdrop-filter: blur(4px);
}

.download-btn {
  display: inline-flex;
  align-items: center;
  padding: 1rem 2.5rem;
  border-radius: 9999px;
  background: linear-gradient(135deg, var(--primary) 0%, #ff8c42 100%);
  color: #fff;
  font-weight: 800;
  font-size: 1.15rem;
  border: 2px solid rgba(255, 255, 255, 0.25);
  box-shadow: 0 8px 25px rgba(255, 107, 53, 0.4), inset 0 2px 0 rgba(255, 255, 255, 0.2);
  transition: all 0.3s ease;
  text-decoration: none;
}

.download-btn:hover {
  transform: scale(1.05) translateY(-2px);
  box-shadow: 0 12px 35px rgba(255, 107, 53, 0.55), inset 0 2px 0 rgba(255, 255, 255, 0.2);
}

.scroll-hint {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  color: rgba(255, 255, 255, 0.6);
  animation: bounce 2s infinite;
  z-index: 10;
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
  40% { transform: translateX(-50%) translateY(-10px); }
  60% { transform: translateX(-50%) translateY(-5px); }
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 900;
  color: #fff;
  margin-bottom: 0.75rem;
  position: relative;
  display: inline-block;
}

.section-title.center {
  display: block;
  text-align: center;
}

.section-title.center::after {
  left: 50%;
  transform: translateX(-50%);
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -0.5rem;
  left: 0;
  width: 60px;
  height: 4px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
}

.section-subtitle {
  font-size: clamp(0.95rem, 2vw, 1.15rem);
  color: rgba(255, 255, 255, 0.6);
  text-align: center;
}

.intro-section {
  background: var(--dark);
}

.intro-text {
  font-size: 1.05rem;
  line-height: 1.85;
  color: rgba(255, 255, 255, 0.75);
}

.highlight-box {
  background: linear-gradient(135deg, rgba(255, 107, 53, 0.15) 0%, rgba(78, 205, 196, 0.1) 100%);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 1.5rem;
  padding: 2rem;
  backdrop-filter: blur(10px);
}

.stat-item {
  text-align: center;
  padding: 1.25rem;
  border-radius: 1rem;
  background: rgba(255, 255, 255, 0.05);
}

.stat-number {
  display: block;
  font-size: 2.25rem;
  font-weight: 900;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.65);
}

.feature-card {
  background: var(--card-bg);
  border-radius: 1.5rem;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.08);
  transition: all 0.3s ease;
  height: 100%;
}

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.35);
  border-color: rgba(255, 107, 53, 0.3);
}

.feature-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.feature-icon {
  width: 50px;
  height: 50px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  color: #fff;
  margin-bottom: 1rem;
}

.feature-title {
  font-size: 1.25rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
  color: #fff;
}

.feature-desc {
  font-size: 0.95rem;
  color: rgba(255, 255, 255, 0.65);
  line-height: 1.65;
}

.download-section {
  background: linear-gradient(135deg, rgba(255, 107, 53, 0.2) 0%, rgba(78, 205, 196, 0.15) 100%);
  position: relative;
  overflow: hidden;
}

.download-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('https://filetx.3633yx.com/250419-9333b78083874bbfb4928a2b3cf1779d.jpeg') center/cover no-repeat;
  opacity: 0.12;
}

.contact-card {
  background: var(--card-bg);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 1.5rem;
  padding: 1.5rem;
  text-align: center;
  transition: all 0.3s ease;
}

.contact-card:hover {
  transform: translateY(-5px);
  border-color: rgba(255, 217, 61, 0.3);
}

.contact-card img {
  width: 120px;
  height: 120px;
  object-fit: cover;
  border-radius: 1rem;
  margin: 0 auto 1rem;
  border: 2px solid rgba(255, 255, 255, 0.1);
}

.contact-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 0.25rem;
}

.contact-card p {
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.9rem;
}

.footer-link {
  color: rgba(255, 255, 255, 0.6);
  transition: color 0.3s ease;
  text-decoration: none;
}

.footer-link:hover {
  color: var(--accent);
}

.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.6s ease;
}

.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 768px) {
  .page-hero {
    padding: 5rem 0 3rem;
  }

  .hero-badges {
    gap: 0.5rem;
  }

  .hero-badge {
    font-size: 0.75rem;
    padding: 0.4rem 0.8rem;
  }

  .feature-card img {
    height: 160px;
  }
}