/* 旋风加速器官网 - 全局样式 */
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif; color: #333; line-height: 1.6; background: #f8f9fa; }
a { text-decoration: none; color: inherit; }

/* 导航栏 */
.header { background: linear-gradient(135deg, #1a73e8, #0d47a1); color: #fff; padding: 0 0; position: sticky; top: 0; z-index: 100; box-shadow: 0 2px 10px rgba(0,0,0,0.1); }
.header-inner { max-width: 1200px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; padding: 15px 20px; }
.logo { font-size: 24px; font-weight: bold; letter-spacing: 2px; }
.logo span { color: #ffd54f; }
.nav { display: flex; gap: 5px; flex-wrap: wrap; }
.nav a { color: #fff; padding: 8px 16px; border-radius: 6px; font-size: 15px; transition: background 0.3s; }
.nav a:hover, .nav a.active { background: rgba(255,255,255,0.2); }

/* Hero区域 */
.hero { background: linear-gradient(135deg, #1a73e8 0%, #0d47a1 50%, #1a237e 100%); color: #fff; text-align: center; padding: 80px 20px; }
.hero h1 { font-size: 42px; margin-bottom: 20px; letter-spacing: 3px; }
.hero p { font-size: 18px; max-width: 700px; margin: 0 auto 30px; opacity: 0.9; line-height: 1.8; }
.hero-btns { display: flex; gap: 15px; justify-content: center; flex-wrap: wrap; }
.btn { display: inline-block; padding: 14px 36px; border-radius: 8px; font-size: 16px; font-weight: bold; transition: transform 0.2s, box-shadow 0.2s; cursor: pointer; }
.btn:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(0,0,0,0.2); }
.btn-primary { background: #ffd54f; color: #1a237e; }
.btn-outline { border: 2px solid #fff; color: #fff; }
.btn-blue { background: #1a73e8; color: #fff; }

/* 通用区块 */
.section { padding: 60px 20px; max-width: 1200px; margin: 0 auto; }
.section-title { text-align: center; font-size: 32px; color: #1a237e; margin-bottom: 15px; }
.section-desc { text-align: center; color: #666; font-size: 16px; max-width: 600px; margin: 0 auto 40px; }

/* 特性卡片 */
.features-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 30px; }
.feature-card { background: #fff; border-radius: 12px; padding: 35px 25px; text-align: center; box-shadow: 0 4px 15px rgba(0,0,0,0.06); transition: transform 0.3s, box-shadow 0.3s; }
.feature-card:hover { transform: translateY(-5px); box-shadow: 0 8px 30px rgba(0,0,0,0.1); }
.feature-icon { font-size: 48px; margin-bottom: 20px; }
.feature-card h3 { font-size: 20px; color: #1a237e; margin-bottom: 12px; }
.feature-card p { color: #666; font-size: 14px; line-height: 1.8; }

/* FAQ */
.faq-category { margin-bottom: 40px; }
.faq-category h3 { font-size: 22px; color: #1a73e8; margin-bottom: 15px; padding-bottom: 10px; border-bottom: 2px solid #e3f2fd; }
.faq-item { background: #fff; border-radius: 10px; padding: 25px; margin-bottom: 15px; box-shadow: 0 2px 8px rgba(0,0,0,0.05); }
.faq-item h4 { font-size: 17px; color: #1a237e; margin-bottom: 12px; }
.faq-item ol { padding-left: 20px; }
.faq-item ol li { margin-bottom: 8px; color: #555; line-height: 1.8; }

/* 下载页 */
.download-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 25px; }
.download-card { background: #fff; border-radius: 12px; padding: 30px; text-align: center; box-shadow: 0 4px 15px rgba(0,0,0,0.06); }
.download-card h3 { font-size: 20px; color: #1a237e; margin-bottom: 10px; }
.download-card p { color: #666; font-size: 14px; margin-bottom: 20px; }
.download-card .btn { width: 100%; text-align: center; }

/* 关于/联系 */
.about-content { background: #fff; border-radius: 12px; padding: 40px; box-shadow: 0 4px 15px rgba(0,0,0,0.06); }
.about-content h3 { font-size: 22px; color: #1a237e; margin-bottom: 15px; margin-top: 25px; }
.about-content h3:first-child { margin-top: 0; }
.about-content p { color: #555; line-height: 2; margin-bottom: 10px; }
.contact-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 25px; }
.contact-card { background: #fff; border-radius: 12px; padding: 30px; text-align: center; box-shadow: 0 4px 15px rgba(0,0,0,0.06); }
.contact-card .icon { font-size: 40px; margin-bottom: 15px; }
.contact-card h3 { font-size: 18px; color: #1a237e; margin-bottom: 10px; }
.contact-card p { color: #666; font-size: 14px; }

/* 页脚 */
.footer { background: #1a237e; color: rgba(255,255,255,0.8); padding: 40px 20px; text-align: center; }
.footer-links { display: flex; justify-content: center; gap: 20px; flex-wrap: wrap; margin-bottom: 20px; }
.footer-links a { color: rgba(255,255,255,0.8); font-size: 14px; transition: color 0.3s; }
.footer-links a:hover { color: #ffd54f; }
.footer p { font-size: 13px; opacity: 0.7; }

/* 统计数字 */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 20px; margin: 40px 0; }
.stat-item { text-align: center; }
.stat-item .num { font-size: 36px; font-weight: bold; color: #1a73e8; }
.stat-item .label { font-size: 14px; color: #666; margin-top: 5px; }

/* 隐私政策 */
.policy-content { background: #fff; border-radius: 12px; padding: 40px; box-shadow: 0 4px 15px rgba(0,0,0,0.06); }
.policy-content h3 { font-size: 20px; color: #1a237e; margin: 25px 0 12px; }
.policy-content h3:first-child { margin-top: 0; }
.policy-content p { color: #555; line-height: 2; margin-bottom: 10px; }
.policy-content ul { padding-left: 20px; margin-bottom: 15px; }
.policy-content ul li { color: #555; line-height: 2; }

/* 面包屑 */
.breadcrumb { background: #e3f2fd; padding: 12px 20px; font-size: 14px; color: #666; }
.breadcrumb a { color: #1a73e8; }
.breadcrumb-inner { max-width: 1200px; margin: 0 auto; }

/* 响应式 */
@media (max-width: 768px) {
  .header-inner { flex-direction: column; gap: 10px; }
  .nav { justify-content: center; }
  .hero h1 { font-size: 28px; }
  .hero p { font-size: 15px; }
  .section-title { font-size: 24px; }
  .btn { padding: 12px 24px; font-size: 14px; }
}