* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: -apple-system, BlinkMacSystemFont, \"Segoe UI\", \"PingFang SC\", \"Hiragino Sans GB\", \"Microsoft YaHei\", sans-serif; color: #333; line-height: 1.6; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.header { background: #1a3a5c; color: #fff; position: fixed; width: 100%; top: 0; z-index: 100; }
.header-inner { display: flex; justify-content: space-between; align-items: center; padding: 12px 20px; max-width: 1200px; margin: 0 auto; }
.logo { font-size: 22px; font-weight: 700; text-decoration: none; color: #fff; }
.logo span { color: #f0c040; }
.nav { display: flex; gap: 24px; }
.nav a { color: #ccc; text-decoration: none; font-size: 15px; transition: 0.3s; }
.nav a:hover, .nav a.active { color: #f0c040; }
.menu-btn { display: none; flex-direction: column; cursor: pointer; }
.menu-btn span { width: 24px; height: 2px; background: #fff; margin: 3px 0; }
.hero { background: linear-gradient(135deg, #1a3a5c 0%, #2a5f8f 100%); color: #fff; padding: 120px 0 60px; text-align: center; }
.hero h1 { font-size: 36px; margin-bottom: 16px; }
.hero p { font-size: 18px; opacity: 0.9; max-width: 700px; margin: 0 auto 32px; }
.hero-btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.btn { display: inline-block; padding: 12px 32px; border-radius: 6px; text-decoration: none; font-size: 16px; font-weight: 500; transition: 0.3s; }
.btn-primary { background: #f0c040; color: #1a3a5c; }
.btn-primary:hover { background: #e0b030; }
.btn-outline { border: 2px solid #fff; color: #fff; }
.btn-outline:hover { background: rgba(255,255,255,0.1); }
.section { padding: 60px 0; }
.section-title { text-align: center; font-size: 28px; margin-bottom: 40px; color: #1a3a5c; }
.features { display: grid; grid-template-columns: repeat(4,1fr); gap: 24px; }
.feature { text-align: center; padding: 32px 16px; background: #f8f9fa; border-radius: 8px; }
.feature .icon { font-size: 40px; margin-bottom: 12px; }
.feature h3 { font-size: 18px; margin-bottom: 8px; color: #1a3a5c; }
.feature p { font-size: 14px; color: #666; }
.about-wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; }
.about-text { font-size: 15px; color: #555; line-height: 1.8; }
.about-img { width: 100%; border-radius: 8px; }
.products-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 24px; }
.product-card { border: 1px solid #e0e0e0; border-radius: 8px; padding: 32px; text-align: center; transition: 0.3s; }
.product-card:hover { box-shadow: 0 4px 20px rgba(0,0,0,0.1); }
.product-card h3 { font-size: 20px; color: #1a3a5c; margin-bottom: 12px; }
.product-card p { font-size: 14px; color: #666; margin-bottom: 8px; }
.product-card .tag { display: inline-block; background: #f0c040; color: #1a3a5c; padding: 4px 12px; border-radius: 4px; font-size: 12px; margin-top: 8px; }
.cta { background: #1a3a5c; color: #fff; text-align: center; padding: 60px 0; }
.cta h2 { font-size: 28px; margin-bottom: 16px; }
.cta p { font-size: 16px; opacity: 0.9; margin-bottom: 24px; }
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.contact-info p { margin-bottom: 12px; font-size: 15px; }
.contact-info strong { color: #1a3a5c; }
.contact-form input, .contact-form textarea { width: 100%; padding: 12px; border: 1px solid #ddd; border-radius: 6px; margin-bottom: 12px; font-size: 14px; font-family: inherit; }
.contact-form textarea { height: 120px; resize: vertical; }
.footer { background: #0f1f30; color: #999; text-align: center; padding: 24px 0; font-size: 13px; }
.page-hero { background: linear-gradient(135deg, #1a3a5c 0%, #2a5f8f 100%); color: #fff; padding: 100px 0 40px; text-align: center; }
.page-hero h1 { font-size: 32px; margin-bottom: 8px; }
.page-hero p { font-size: 16px; opacity: 0.85; }
.about-page .about-img-box { text-align: center; margin: 32px 0; }
.about-page .about-img-box img { max-width: 100%; border-radius: 8px; }
.param-table { width: 100%; border-collapse: collapse; margin: 24px 0; }
.param-table th, .param-table td { border: 1px solid #ddd; padding: 10px 16px; text-align: left; }
.param-table th { background: #1a3a5c; color: #fff; }
.param-table tr:nth-child(even) { background: #f8f9fa; }
.app-list { display: grid; grid-template-columns: repeat(2,1fr); gap: 16px; margin: 24px 0; }
.app-item { background: #f8f9fa; border-radius: 8px; padding: 20px; }
.app-item h4 { color: #1a3a5c; margin-bottom: 8px; }
@media (max-width: 768px) {
.nav { display: none; flex-direction: column; background: #1a3a5c; position: absolute; top: 100%; left: 0; right: 0; padding: 16px; }
.nav.active { display: flex; }
.menu-btn { display: flex; }
.features { grid-template-columns: repeat(2,1fr); }
.about-wrap, .contact-grid, .products-grid { grid-template-columns: 1fr; }
.hero h1 { font-size: 28px; }
.app-list { grid-template-columns: 1fr; }
}
@media (max-width: 480px) { .features { grid-template-columns: 1fr; } }