/* 基础重置与字体 */
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Inter', sans-serif; line-height: 1.6; color: #333; }
.container { width: 90%; max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* 导航栏样式 */
header { background: #fff; box-shadow: 0 2px 10px rgba(0,0,0,0.1); position: fixed; width: 100%; top: 0; z-index: 1000; }
nav { display: flex; justify-content: space-between; align-items: center; padding: 1rem 0; }
.nav-links { display: flex; list-style: none; }
.nav-links li { margin-left: 2rem; }
.nav-links a { text-decoration: none; color: #555; font-weight: 500; transition: color 0.3s; }
.nav-links a:hover { color: #007bff; }
.logo { font-size: 1.5rem; font-weight: 700; color: #007bff; text-decoration: none; }

/* 按钮样式 */
.btn { display: inline-block; background: #007bff; color: white; padding: 0.8rem 1.5rem; border-radius: 5px; text-decoration: none; font-weight: 600; border: none; cursor: pointer; transition: background 0.3s; }
.btn:hover { background: #0056b3; }
.btn-large { padding: 1rem 2rem; font-size: 1.1rem; }

/* 英雄区域 */
.hero { background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%); padding: 10rem 0 6rem; text-align: center; margin-top: 60px; /* 为固定导航栏留出空间 */ }
.hero h1 { font-size: 3rem; margin-bottom: 1rem; color: #222; }
.hero p { font-size: 1.2rem; color: #666; max-width: 700px; margin: 0 auto 2rem; }

/* 服务区域 */
.services { padding: 5rem 0; background: #f9f9f9; }
.services h2 { text-align: center; margin-bottom: 3rem; font-size: 2.5rem; }
.services-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 2rem; }
.service-card { background: white; padding: 2rem; border-radius: 10px; text-align: center; box-shadow: 0 5px 15px rgba(0,0,0,0.05); transition: transform 0.3s; }
.service-card:hover { transform: translateY(-5px); }
.service-card i { color: #007bff; margin-bottom: 1rem; }
.service-card h3 { margin-bottom: 1rem; }

/* 页脚 */
footer { background: #222; color: #ddd; padding: 3rem 0 1.5rem; }
.footer-content { display: flex; flex-wrap: wrap; justify-content: space-between; margin-bottom: 2rem; }
.footer-info, .footer-contact, .footer-social { flex: 1; min-width: 250px; margin-bottom: 1.5rem; }
.footer-social a { color: #ddd; font-size: 1.5rem; margin-right: 1rem; }
.copyright { text-align: center; padding-top: 1.5rem; border-top: 1px solid #444; color: #aaa; }