cat << 'EOF' > style.css
/* 全局基础设置：实现简约苹果风格 */
:root {
    --primary-color: #ffffff; /* 主色：白色 */
    --secondary-color: #007aff; /* 辅色：苹果蓝 */
    --text-dark: #333333;
    --text-light: #f4f4f4;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--primary-color);
    scroll-behavior: smooth; /* 平滑滚动 */
}

/* 顶部导航栏 (Top Header) */
.top-nav {
    position: fixed; /* 导航栏固定 */
    top: 0;
    left: 0;
    width: 100%;
    display: flex;
    /* 均匀分布空间 */
    justify-content: space-around; 
    align-items: center;
    padding: 20px 5%; 
    z-index: 1000; 
    background: rgba(255, 255, 255, 0); /* 初始透明背景 */
}

.logo {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--primary-color); 
    letter-spacing: 1px;
}

.nav-links {
    list-style: none;
    display: flex;
}

.nav-links li a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    margin: 0 15px;
    transition: color 0.3s ease;
}

.nav-links li a:hover {
    color: var(--secondary-color); /* 鼠标悬停变苹果蓝 */
}


/* Hero Section: 全屏背景图与遮罩 */
.hero-section {
    position: relative;
    height: 100vh; /* 全屏高度 */
    display: flex;
    flex-direction: column;
    justify-content: center; 
    align-items: center; 
    text-align: center;
    color: var(--text-light); 
    
    /* 重点：请确保您的图片命名与此一致 */
    background-image: url('pan-bg.jpg'); 
    background-size: cover;
    background-position: center;
    background-attachment: fixed; /* 视差效果 */
}

/* 遮罩层 (Mask): 确保文字清晰可读 */
.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5); /* 半透明黑色遮罩 */
    z-index: 1;
}

/* Hero 内容居中 */
.hero-content {
    position: relative;
    z-index: 2; 
    padding: 0 20px; 
}

.hero-content h1 {
    font-size: 5rem;
    font-weight: 800;
    margin-bottom: 15px;
    letter-spacing: 3px;
}

.hero-content p {
    font-size: 1.6rem;
    font-weight: 300;
    margin-bottom: 40px;
}

.cta-button {
    display: inline-block;
    padding: 12px 35px;
    background-color: var(--secondary-color);
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    border-radius: 50px; /* 圆角按钮，现代感强 */
    transition: background-color 0.3s ease, transform 0.1s ease;
}

.cta-button:hover {
    background-color: #005bb5; /* 略深的蓝色 */
    transform: translateY(-2px); /* 轻微上浮效果 */
}

/* 后续内容区域样式 */
.content-section {
    padding: 100px 5%;
    max-width: 1000px;
    margin: 0 auto;
    text-align: center;
}

.content-section h2 {
    font-size: 2.5rem;
    margin-bottom: 40px;
    color: var(--text-dark);
}

.content-section p {
    margin-bottom: 20px;
    font-size: 1.1rem;
}

/* Services Grid 样式 */
.service-grid {
    display: flex;
    justify-content: space-around;
    gap: 30px;
    margin-top: 50px;
}

.service-grid div {
    flex-basis: 30%;
    padding: 20px;
    border: 1px solid #eeeeee;
    border-radius: 8px;
    transition: box-shadow 0.3s ease;
}

.service-grid div:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.service-grid h3 {
    color: var(--secondary-color);
    margin-bottom: 10px;
    font-size: 1.4rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .top-nav {
        flex-direction: column;
        padding-top: 10px;
    }
    .nav-links {
        margin-top: 10px;
    }
    .hero-content h1 {
        font-size: 3.5rem;
    }
    .hero-content p {
        font-size: 1.2rem;
    }
    .service-grid {
        flex-direction: column;
    }
}
EOF