/* ===== Reset & Base ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: #333; line-height: 1.6; overflow-x: hidden;
}
.container { max-width: 1100px; margin: 0 auto; padding: 0 20px; }
a { text-decoration: none; color: inherit; }

/* ===== Navbar ===== */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  padding: 15px 0; transition: all 0.3s ease;
}
.navbar.scrolled {
  background: rgba(255,255,255,0.98); box-shadow: 0 2px 20px rgba(0,0,0,0.08);
  padding: 10px 0;
}
.nav-container {
  max-width: 1100px; margin: 0 auto; padding: 0 20px;
  display: flex; align-items: center; justify-content: space-between;
}
.nav-logo { display: flex; align-items: center; gap: 8px; }
.nav-logo img { width: 36px; height: 36px; border-radius: 8px; }
.nav-logo span {
  font-size: 18px; font-weight: 700; color: #fff;
  transition: color 0.3s;
}
.navbar.scrolled .nav-logo span { color: #FF6B35; }
.nav-links {
  display: flex; list-style: none; gap: 28px;
}
.nav-links a {
  font-size: 14px; color: rgba(255,255,255,0.9); font-weight: 500;
  transition: color 0.3s; position: relative;
}
.nav-links a::after {
  content: ''; position: absolute; bottom: -4px; left: 0;
  width: 0; height: 2px; background: #fff; transition: width 0.3s;
}
.nav-links a:hover::after { width: 100%; }
.navbar.scrolled .nav-links a { color: #555; }
.navbar.scrolled .nav-links a:hover { color: #FF6B35; }
.navbar.scrolled .nav-links a::after { background: #FF6B35; }

/* Hamburger */
.hamburger {
  display: none; background: none; border: none; cursor: pointer;
  flex-direction: column; gap: 5px; padding: 5px;
}
.hamburger span {
  width: 24px; height: 2px; background: #fff; transition: all 0.3s;
}
.navbar.scrolled .hamburger span { background: #555; }

/* ===== Hero ===== */
.hero {
  min-height: 100vh; display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, #FF9A56 0%, #FF6B35 50%, #E85D26 100%);
  text-align: center; padding: 80px 20px 60px;
}
.hero-content h1 {
  font-size: 52px; color: #fff; font-weight: 800;
  margin-bottom: 16px; letter-spacing: 2px;
}
.hero-slogan {
  font-size: 20px; color: rgba(255,255,255,0.95); margin-bottom: 10px;
}
.hero-sub {
  font-size: 14px; color: rgba(255,255,255,0.75); margin-bottom: 40px;
}
.hero-qrcode { display: inline-block; }
.hero-qrcode img {
  width: 160px; height: 160px; border-radius: 12px;
  box-shadow: 0 8px 30px rgba(0,0,0,0.2);
}
.hero-qrcode p {
  color: rgba(255,255,255,0.9); font-size: 14px; margin-top: 12px;
}

/* ===== Sections ===== */
.section { padding: 80px 0; }
.section-alt { background: #f9f9f9; }
.section-title {
  text-align: center; font-size: 32px; font-weight: 700;
  margin-bottom: 10px; color: #222;
}
.section-desc {
  text-align: center; color: #888; font-size: 16px; margin-bottom: 50px;
}

/* ===== Features 核心功能 ===== */
.features-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px;
}
.feature-card {
  background: #fff; border-radius: 16px; padding: 40px 30px;
  text-align: center; box-shadow: 0 4px 20px rgba(0,0,0,0.06);
  transition: transform 0.3s, box-shadow 0.3s;
}
.feature-card:hover {
  transform: translateY(-6px); box-shadow: 0 12px 40px rgba(255,107,53,0.15);
}
.feature-icon { font-size: 48px; margin-bottom: 20px; }
.feature-card h3 {
  font-size: 20px; margin-bottom: 12px; color: #222; white-space: nowrap;
}
.feature-card p { color: #666; font-size: 14px; line-height: 1.8; }

/* ===== More 更多功能 ===== */
.more-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px;
}
.more-card {
  background: #fff; border-radius: 14px; padding: 32px 28px;
  text-align: center;
  box-shadow: 0 2px 16px rgba(0,0,0,0.05);
  transition: transform 0.3s, box-shadow 0.3s;
}
.more-card:hover {
  transform: translateY(-4px); box-shadow: 0 8px 30px rgba(255,107,53,0.12);
}
.more-icon { font-size: 40px; margin-bottom: 16px; }
.more-card h3 { font-size: 18px; margin-bottom: 10px; color: #222; white-space: nowrap; }
.more-card p { color: #666; font-size: 14px; line-height: 1.7; }

/* ===== Pricing 价格 ===== */
.pricing-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
  align-items: stretch;
}
.price-card {
  background: #fff; border-radius: 16px; padding: 36px 28px;
  text-align: center; box-shadow: 0 4px 20px rgba(0,0,0,0.06);
  position: relative; transition: transform 0.3s, box-shadow 0.3s;
  border: 2px solid transparent;
}
.price-card:hover {
  transform: translateY(-6px); box-shadow: 0 12px 40px rgba(255,107,53,0.15);
}
.price-card.popular {
  border-color: #FF6B35; transform: scale(1.05);
}
.price-card.popular:hover { transform: scale(1.05) translateY(-6px); }
.price-badge {
  position: absolute; top: -12px; left: 50%; transform: translateX(-50%);
  background: linear-gradient(135deg, #FF9A56, #FF6B35);
  color: #fff; font-size: 12px; font-weight: 600;
  padding: 4px 16px; border-radius: 20px;
}
.price-card h3 { font-size: 20px; color: #222; margin-bottom: 16px; }
.price-amount {
  font-size: 42px; font-weight: 800; color: #FF6B35; margin-bottom: 4px;
}
.price-amount span { font-size: 16px; font-weight: 400; }
.price-unit { color: #999; font-size: 14px; margin-bottom: 20px; }
.price-features { list-style: none; margin-bottom: 24px; }
.price-features li {
  padding: 8px 0; color: #666; font-size: 14px;
  border-bottom: 1px solid #f0f0f0;
}
.price-features li:last-child { border-bottom: none; }

/* ===== Trust 信任背书 ===== */
.trust-content { text-align: center; max-width: 700px; margin: 0 auto; }
.trust-card {
  background: #fff; border-radius: 16px; padding: 40px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.06); margin-top: 30px;
  border-left: 4px solid #FF6B35;
}
.trust-card h3 {
  font-size: 20px; color: #FF6B35; margin-bottom: 16px;
}
.trust-card p { color: #555; font-size: 15px; line-height: 1.9; text-align: left; }

/* ===== CTA 扫码体验 ===== */
.cta-section {
  background: linear-gradient(135deg, #FF9A56 0%, #FF6B35 100%);
  padding: 80px 0;
}
.cta-content { text-align: center; }
.cta-content h2 { color: #fff; font-size: 32px; margin-bottom: 12px; }
.cta-content > p { color: rgba(255,255,255,0.9); font-size: 16px; }
.cta-qrcode {
  margin: 36px auto; background: #fff; border-radius: 16px;
  padding: 16px; display: inline-block;
}
.cta-qrcode img { width: 200px; height: 200px; display: block; }
.cta-tip {
  color: rgba(255,255,255,0.85); font-size: 14px; margin-top: 8px;
}

/* ===== Footer ===== */
.footer {
  background: #222; padding: 24px 0; text-align: center;
}
.footer p { color: #888; font-size: 13px; }

/* ===== Fade-in Animation ===== */
.fade-in {
  opacity: 0; transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .features-grid { grid-template-columns: 1fr; max-width: 420px; margin: 0 auto; }
  .more-grid { grid-template-columns: 1fr; max-width: 480px; margin: 0 auto; }
  .pricing-grid { grid-template-columns: 1fr; max-width: 360px; margin: 0 auto; }
  .price-card.popular { transform: none; }
  .price-card.popular:hover { transform: translateY(-6px); }
}

@media (max-width: 768px) {
  .hamburger { display: flex; }
  .nav-links {
    position: fixed; top: 0; right: -100%; width: 260px; height: 100vh;
    background: #fff; flex-direction: column; padding: 80px 30px 30px;
    gap: 0; box-shadow: -4px 0 20px rgba(0,0,0,0.1);
    transition: right 0.3s ease;
  }
  .nav-links.active { right: 0; }
  .nav-links a {
    color: #333 !important; font-size: 16px;
    padding: 14px 0; border-bottom: 1px solid #f0f0f0;
  }
  .nav-links a::after { display: none; }
  .hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }
  .hamburger.active span:nth-child(2) { opacity: 0; }
  .hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }
  .hero-content h1 { font-size: 32px; }
  .hero-slogan { font-size: 16px; }
  .section { padding: 50px 0; }
  .section-title { font-size: 24px; }
  .section-desc { margin-bottom: 30px; }
  .cta-content h2 { font-size: 24px; }
}