/* 基本重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: #f5f7fa;
    color: #333;
    line-height: 1.6;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}

a {
    text-decoration: none;
    color: #0066cc;
}

/* 头部 */
header {
    background-color: #fff;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

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

header h1 {
    color: #2c3e50;
    font-size: 1.5rem;
}

nav ul {
    list-style: none;
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

nav a {
    color: #555;
    font-weight: 500;
    transition: color 0.3s;
}

nav a:hover, nav a.active {
    color: #0066cc;
}

.btn-download {
    background-color: #0066cc;
    color: white !important;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    font-weight: bold;
}

.btn-download:hover {
    background-color: #004c99;
}

/* 英雄区 */
.hero {
    background: linear-gradient(135deg, #0066cc, #004c99);
    color: white;
    padding: 4rem 0;
    text-align: center;
    margin-bottom: 2rem;
}

.hero h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.2rem;
    max-width: 800px;
    margin: 0 auto 2rem;
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background-color: #fff;
    color: #0066cc;
    border-radius: 4px;
    font-weight: bold;
    font-size: 1.1rem;
    transition: all 0.3s;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

.btn-outline {
    background-color: transparent;
    border: 2px solid #fff;
    color: #fff;
}

.btn-outline:hover {
    background-color: rgba(255,255,255,0.1);
}

/* 特性区 */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.feature-item {
    background: #fff;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
    transition: transform 0.3s;
}

.feature-item:hover {
    transform: translateY(-5px);
}

.feature-item h3 {
    color: #2c3e50;
    margin-bottom: 1rem;
    font-size: 1.25rem;
}

/* SEO 内容区 */
.seo-content {
    background: #fff;
    padding: 2rem;
    border-radius: 8px;
    margin-bottom: 3rem;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
}

.seo-content h2 {
    margin-bottom: 1rem;
    color: #2c3e50;
    border-bottom: 2px solid #eee;
    padding-bottom: 0.5rem;
}

.seo-content p {
    margin-bottom: 1rem;
    color: #555;
}

/* 下载页面专用 */
.download-card {
    background: #fff;
    border-radius: 8px;
    padding: 3rem;
    text-align: center;
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
    margin: 2rem auto;
    max-width: 800px;
}

.download-btn {
    display: inline-block;
    background: #28a745;
    color: white;
    font-size: 1.5rem;
    padding: 1rem 3rem;
    border-radius: 50px;
    margin: 2rem 0;
    font-weight: bold;
    transition: all 0.3s;
    box-shadow: 0 4px 15px rgba(40,167,69,0.3);
}

.download-btn:hover {
    background: #218838;
    transform: scale(1.05);
}

.preview-window {
    background: #1e1e1e;
    color: #d4d4d4;
    padding: 1rem;
    border-radius: 8px;
    text-align: left;
    font-family: monospace;
    margin-top: 2rem;
    overflow-x: auto;
    border-left: 5px solid #0066cc;
}

/* 页脚 */
footer {
    background: #2c3e50;
    color: #fff;
    text-align: center;
    padding: 2rem 0;
    margin-top: auto;
}

footer a {
    color: #8bc34a;
}