/* 基础重置 */
* {
    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;
    line-height: 1.6;
    color: #333;
    background-color: #fff;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

a {
    text-decoration: none;
    color: inherit;
}

/* 头部导航 */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    z-index: 1000;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    font-size: 24px;
    font-weight: 600;
    color: #1e3c72;
}

.nav a {
    margin-left: 30px;
    font-size: 16px;
    color: #666;
    transition: color 0.3s;
}

.nav a:hover {
    color: #2a5298;
}


/* 主视觉区域 */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: linear-gradient(135deg, #1e3c72 0%, #2a5298 50%, #4facfe 100%);
    color: #fff;
    padding-top: 70px;
    position: relative;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 20% 80%, rgba(255,255,255,0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255,255,255,0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(255,255,255,0.05) 0%, transparent 30%);
    animation: float 20s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(1deg); }
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero h1 {
    font-size: 56px;
    font-weight: 700;
    margin-bottom: 20px;
    letter-spacing: 4px;
    text-shadow: 0 4px 20px rgba(0,0,0,0.2);
}

.hero .subtitle {
    font-size: 22px;
    opacity: 0.9;
    margin-bottom: 20px;
}

.divider {
    width: 60px;
    height: 4px;
    background: rgba(255, 255, 255, 0.8);
    margin: 0 auto 25px;
    border-radius: 2px;
}

.hero-desc {
    font-size: 16px;
    opacity: 0.85;
    margin-bottom: 40px;
    letter-spacing: 2px;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 50px;
    margin-bottom: 40px;
}

.stat-item {
    text-align: center;
}

.stat-num {
    display: block;
    font-size: 42px;
    font-weight: 700;
    line-height: 1;
    margin-bottom: 8px;
}

.stat-label {
    font-size: 14px;
    opacity: 0.8;
}

.hero-btn {
    display: inline-block;
    padding: 14px 40px;
    background: rgba(255,255,255,0.2);
    border: 2px solid rgba(255,255,255,0.5);
    border-radius: 50px;
    color: #fff;
    font-size: 16px;
    font-weight: 500;
    transition: all 0.3s;
    backdrop-filter: blur(10px);
}

.hero-btn:hover {
    background: rgba(255,255,255,0.3);
    border-color: rgba(255,255,255,0.8);
    transform: translateY(-2px);
}

.scroll-hint {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    opacity: 0.7;
    animation: bounce 2s infinite;
}

.scroll-hint span {
    font-size: 12px;
    display: block;
    margin-bottom: 8px;
}

.scroll-arrow {
    width: 20px;
    height: 20px;
    border-right: 2px solid #fff;
    border-bottom: 2px solid #fff;
    transform: rotate(45deg);
    margin: 0 auto;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
    40% { transform: translateX(-50%) translateY(-10px); }
    60% { transform: translateX(-50%) translateY(-5px); }
}

/* 通用区域样式 */
.services,
.about,
.contact {
    padding: 100px 0;
}

.services {
    background: #fff;
}

.about {
    background: #f8f9fa;
}

.contact {
    background: #fff;
}

.services h2,
.about h2,
.contact h2 {
    text-align: center;
    font-size: 36px;
    color: #1e3c72;
    margin-bottom: 20px;
}

.section-desc {
    text-align: center;
    font-size: 18px;
    color: #666;
    max-width: 600px;
    margin: 0 auto 60px;
}

.features {
    display: flex;
    justify-content: center;
    gap: 40px;
    flex-wrap: wrap;
}

.feature-item {
    background: #fff;
    padding: 40px 30px;
    border-radius: 12px;
    text-align: center;
    width: 280px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s, box-shadow 0.3s;
}

.feature-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(30, 60, 114, 0.15);
}

.feature-item .icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.feature-item h3 {
    font-size: 22px;
    color: #1e3c72;
    margin-bottom: 12px;
}

.feature-item p {
    font-size: 15px;
    color: #888;
}

/* 页脚 */
.footer {
    background: #1e3c72;
    color: #fff;
    padding: 40px 0;
    text-align: center;
}

.footer .copyright {
    font-size: 14px;
    opacity: 0.8;
    margin-bottom: 10px;
}

.footer .icp {
    font-size: 13px;
}

.footer .icp a {
    color: rgba(255, 255, 255, 0.7);
    transition: color 0.3s;
}

.footer .icp a:hover {
    color: #fff;
}

.footer .notice {
    font-size: 12px;
    opacity: 0.6;
    margin-top: 10px;
}

/* 联系区域 */
.contact-info {
    text-align: center;
    background: #f8f9fa;
    padding: 40px;
    border-radius: 12px;
    max-width: 500px;
    margin: 0 auto;
}

.contact-item {
    font-size: 18px;
    color: #333;
}

.contact-item .label {
    color: #666;
}

.contact-item .value {
    color: #2a5298;
    font-weight: 500;
}

/* 联系提示 */
.contact-tip {
    text-align: center;
    margin-top: 50px;
    font-size: 16px;
    color: #666;
    padding: 20px;
    background: linear-gradient(135deg, #1e3c7220 0%, #4facfe20 100%);
    border-radius: 8px;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

.contact-tip strong {
    color: #2a5298;
    font-size: 18px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 36px;
    }
    
    .hero .subtitle {
        font-size: 18px;
    }
    
    .hero-desc {
        font-size: 14px;
        padding: 0 20px;
    }
    
    .hero-stats {
        gap: 25px;
    }
    
    .stat-num {
        font-size: 32px;
    }
    
    .stat-label {
        font-size: 12px;
    }
    
    .services h2,
    .about h2,
    .contact h2 {
        font-size: 28px;
    }
    
    .section-desc {
        font-size: 16px;
        padding: 0 10px;
    }
    
    .features {
        gap: 20px;
    }
    
    .feature-item {
        width: 100%;
        max-width: 320px;
    }
    
    .nav a {
        margin-left: 15px;
        font-size: 14px;
    }
    
    .logo {
        font-size: 20px;
    }
    
    .services,
    .about,
    .contact {
        padding: 60px 0;
    }
    
    .contact-tip {
        margin: 30px 15px 0;
    }
}