* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  color: #1a202c;
  background: #f7fafc;
  line-height: 1.6;
}
a { color: inherit; text-decoration: none; }
.container { width: 92%; max-width: 1200px; margin: 0 auto; }

.site-header {
  background: #0b1220;
  color: #fff;
  padding: 16px 0;
  box-shadow: 0 2px 8px rgba(0,0,0,.3);
  position: sticky;
  top: 0;
  z-index: 999;
}
.header-inner { display: flex; align-items: center; justify-content: space-between; }
.logo { font-size: 22px; font-weight: 700; display: flex; align-items: center; gap: 8px; }
.logo small { font-size: 12px; color: #76b8ff; font-weight: 400; }
.logo-emoji { font-size: 26px; }
.main-nav ul { list-style: none; display: flex; gap: 28px; }
.main-nav a { color: #d9e3f5; font-size: 15px; padding: 6px 2px; border-bottom: 2px solid transparent; transition: all .2s; }
.main-nav a:hover, .main-nav a.active { color: #3b82f6; border-color: #3b82f6; }
.header-btn .btn { padding: 8px 16px; font-size: 14px; }

.btn {
  display: inline-block;
  padding: 10px 22px;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all .2s;
  border: 1px solid transparent;
}
.btn-primary { background: linear-gradient(135deg,#3b82f6,#1d4ed8); color: #fff; box-shadow: 0 4px 12px rgba(59,130,246,.3); }
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 6px 16px rgba(59,130,246,.4); }
.btn-outline { border-color: #3b82f6; color: #3b82f6; background: transparent; }
.btn-outline:hover { background: #3b82f6; color: #fff; }

.hero {
  background: linear-gradient(135deg, #0b1220 0%, #1e3a8a 50%, #0f766e 100%);
  color: #fff;
  padding: 80px 0;
  text-align: center;
  position: relative;
}
.hero::before {
  content: "🌐";
  position: absolute;
  right: 5%;
  top: 20%;
  font-size: 200px;
  opacity: .08;
}
.hero h1 { font-size: 42px; margin-bottom: 18px; line-height: 1.3; }
.hero-sub { font-size: 18px; color: #cbd5e1; max-width: 800px; margin: 0 auto 32px; }
.hero-btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.hero-stats {
  margin-top: 50px;
  display: grid;
  grid-template-columns: repeat(4,1fr);
  gap: 20px;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}
.stat-item {
  background: rgba(255,255,255,.08);
  padding: 20px;
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,.1);
}
.stat-item strong { display: block; font-size: 26px; color: #60a5fa; }
.stat-item span { font-size: 14px; color: #cbd5e1; }

.page-hero {
  background: linear-gradient(135deg, #0b1220, #1e3a8a);
  color: #fff;
  padding: 60px 0;
  text-align: center;
}
.page-hero h1 { font-size: 36px; margin-bottom: 12px; }
.page-hero p { font-size: 16px; color: #cbd5e1; max-width: 700px; margin: 0 auto; }

.section-title {
  text-align: center;
  font-size: 30px;
  margin-bottom: 12px;
  color: #1e293b;
}
.section-desc {
  text-align: center;
  color: #64748b;
  margin-bottom: 40px;
  font-size: 16px;
}
.features, .products, .download-section, .news-preview, .news-full, .contact-section, .about-section {
  padding: 70px 0;
}
.features { background: #fff; }
.products { background: #f1f5f9; }
.download-section { background: #fff; }
.news-preview { background: #f1f5f9; }
.news-full { background: #fff; }
.contact-section { background: #f1f5f9; }
.about-section { background: #fff; }

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4,1fr);
  gap: 22px;
}
.feature-card {
  background: #fff;
  border: 1px solid #e2e8f0;
  border-radius: 12px;
  padding: 30px 20px;
  text-align: center;
  transition: all .25s;
}
.features .feature-card, .about-section .feature-card { background: #f8fafc; }
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 25px rgba(0,0,0,.08);
  border-color: #3b82f6;
}
.feature-icon { font-size: 40px; margin-bottom: 14px; }
.feature-card h3 { font-size: 18px; color: #1e293b; margin-bottom: 8px; }
.feature-card p { font-size: 14px; color: #64748b; }

.product-grid {
  display: grid;
  grid-template-columns: repeat(3,1fr);
  gap: 24px;
}
.product-card {
  background: #fff;
  border: 1px solid #e2e8f0;
  border-radius: 12px;
  padding: 30px 24px;
  transition: all .25s;
}
.product-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 30px rgba(59,130,246,.15);
  border-color: #3b82f6;
}
.product-card h3 { font-size: 20px; color: #1e293b; margin-bottom: 12px; }
.product-card p { font-size: 15px; color: #475569; margin-bottom: 14px; }
.product-card ul { list-style: none; }
.product-card ul li { font-size: 14px; color: #334155; padding: 5px 0; }

.download-grid {
  display: grid;
  grid-template-columns: repeat(3,1fr);
  gap: 24px;
}
.download-card {
  padding: 40px 24px;
  border-radius: 14px;
  text-align: center;
  color: #fff;
}
.download-card.android { background: linear-gradient(135deg,#10b981,#047857); }
.download-card.ios { background: linear-gradient(135deg,#6366f1,#4338ca); }
.download-card.web { background: linear-gradient(135deg,#f59e0b,#b45309); }
.download-card h3 { font-size: 22px; margin-bottom: 8px; }
.download-card p { margin-bottom: 20px; font-size: 15px; opacity: .95; }
.download-card .btn { background: #fff; color: #1e293b; }
.download-card .btn:hover { background: #f1f5f9; }

.news-list { display: flex; flex-direction: column; gap: 16px; max-width: 960px; margin: 0 auto; }
.news-item {
  background: #fff;
  border: 1px solid #e2e8f0;
  border-left: 4px solid #3b82f6;
  border-radius: 8px;
  padding: 22px 24px;
  transition: all .2s;
}
.news-preview .news-item { background: #fff; }
.news-full .news-item { background: #f8fafc; }
.news-item:hover {
  transform: translateX(4px);
  box-shadow: 0 6px 20px rgba(0,0,0,.08);
}
.news-item h3 { font-size: 18px; color: #1e293b; margin-bottom: 8px; }
.news-item h3 a:hover { color: #3b82f6; }
.news-item time { display: block; font-size: 13px; color: #94a3b8; margin-bottom: 6px; }
.news-item p { font-size: 15px; color: #475569; }

.contact-grid {
  display: grid;
  grid-template-columns: repeat(4,1fr);
  gap: 22px;
}
.contact-card {
  background: #fff;
  border: 1px solid #e2e8f0;
  border-radius: 12px;
  padding: 30px 20px;
  text-align: center;
  transition: all .25s;
}
.contact-card:hover {
  border-color: #3b82f6;
  transform: translateY(-4px);
  box-shadow: 0 10px 25px rgba(0,0,0,.08);
}
.contact-icon { font-size: 40px; margin-bottom: 12px; }
.contact-card h3 { font-size: 18px; margin-bottom: 10px; color: #1e293b; }
.contact-card p { font-size: 14px; color: #64748b; margin: 4px 0; }

.about-content p {
  font-size: 16px;
  color: #475569;
  margin-bottom: 30px;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}
.timeline {
  display: grid;
  grid-template-columns: repeat(3,1fr);
  gap: 16px;
  margin: 30px 0;
}
.timeline-item {
  background: linear-gradient(135deg,#eff6ff,#e0f2fe);
  padding: 20px;
  border-radius: 10px;
  border-left: 4px solid #3b82f6;
}
.timeline-item h3 { color: #1d4ed8; font-size: 22px; margin-bottom: 6px; }
.timeline-item p { color: #475569; font-size: 14px; }

.site-footer {
  background: #0b1220;
  color: #cbd5e1;
  padding: 60px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 30px;
  padding-bottom: 40px;
}
.footer-grid h4 { color: #fff; font-size: 16px; margin-bottom: 14px; }
.footer-grid p { font-size: 14px; color: #94a3b8; margin-bottom: 8px; }
.footer-grid ul { list-style: none; }
.footer-grid ul li { padding: 5px 0; font-size: 14px; }
.footer-grid ul li a { color: #94a3b8; transition: color .2s; }
.footer-grid ul li a:hover { color: #60a5fa; }
.footer-bottom {
  border-top: 1px solid #1e293b;
  padding: 20px 0;
  text-align: center;
  color: #64748b;
  font-size: 13px;
}

@media (max-width: 768px) {
  .main-nav ul { gap: 12px; }
  .main-nav a { font-size: 13px; }
  .hero h1 { font-size: 28px; }
  .hero-sub { font-size: 15px; }
  .hero-stats { grid-template-columns: repeat(2,1fr); }
  .feature-grid, .product-grid, .download-grid, .contact-grid, .timeline { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .header-inner { flex-wrap: wrap; gap: 12px; }
}