/* 基础样式 */
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Inter', sans-serif; line-height: 1.6; color: #333; background-color: #f4f7f9; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* 导航栏 */
.navbar { background: #003366; color: white; padding: 20px 0; position: sticky; top: 0; z-index: 1000; }
.navbar .container { display: flex; justify-content: space-between; align-items: center; }
.logo { font-size: 24px; font-weight: bold; }
.logo span { color: #00aaff; }
.nav-links { list-style: none; display: flex; gap: 20px; align-items: center; }
.nav-links a { color: white; text-decoration: none; font-weight: 600; }

/* Hero 区域 */
.hero { background: linear-gradient(rgba(0,51,102,0.8), rgba(0,51,102,0.8)), url('https://images.unsplash.com/photo-1451187580459-43490279c0fa?auto=format&fit=crop&q=80&w=1500'); background-size: cover; color: white; padding: 100px 0; text-align: center; }
.hero h1 { font-size: 48px; margin-bottom: 20px; }
.hero p { font-size: 20px; max-width: 800px; margin: 0 auto 30px; }

/* 按钮 */
.btn-primary { background: #00aaff; color: white !important; padding: 10px 20px; border-radius: 5px; }
.btn-secondary { background: white; color: #003366; padding: 12px 25px; text-decoration: none; border-radius: 5px; font-weight: bold; }

/* 网格系统 */
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 30px; margin-top: 40px; }
.section-title { text-align: center; font-size: 32px; color: #003366; }

/* 卡片样式 */
.card { background: white; padding: 20px; border-radius: 10px; box-shadow: 0 5px 15px rgba(0,0,0,0.1); text-align: center; }
.card img { width: 100%; height: 200px; object-fit: cover; border-radius: 5px; margin-bottom: 15px; }

/* 优势区域图片（去人脸化） */
.feature-item { text-align: center; }
.feature-item img { width: 80px; height: 80px; margin-bottom: 15px; filter: hue-rotate(180deg); }

.services, .approach { padding: 80px 0; }
.footer { background: #002244; color: white; padding: 40px 0; text-align: center; }