/* style.css - 极简且高度SEO友好的样式表 */

/* 基础重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    color: #333;
    line-height: 1.6;
    background-color: #f9f9fb;
}

a {
    text-decoration: none;
    color: #007bff;
    transition: color 0.3s;
}

a:hover {
    color: #0056b3;
}

/* 布局辅助类 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.text-center { text-align: center; }
.mt-50 { margin-top: 50px; }
.mb-50 { margin-bottom: 50px; }

/* 导航头 */
.header {
    background-color: #fff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo h1 {
    font-size: 24px;
    color: #222;
    margin: 0;
}

.nav ul {
    list-style: none;
    display: flex;
    gap: 30px;
}

.nav a {
    color: #555;
    font-weight: 600;
    font-size: 16px;
}

.nav a.active, .nav a:hover {
    color: #007bff;
}

/* 按钮 */
.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 4px;
    font-size: 16px;
    font-weight: bold;
    text-align: center;
    cursor: pointer;
    transition: background 0.3s, transform 0.2s;
}

.btn-primary {
    background-color: #007bff;
    color: #fff;
    border: none;
}

.btn-primary:hover {
    background-color: #0056b3;
    color: #fff;
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: #fff;
    color: #007bff;
    border: 2px solid #007bff;
}

.btn-secondary:hover {
    background-color: #f0f8ff;
    color: #0056b3;
}

/* 英雄区 (Hero) */
.hero {
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    padding: 100px 20px;
    text-align: center;
}

.hero h2 {
    font-size: 42px;
    margin-bottom: 20px;
    color: #2c3e50;
}

.hero h2 strong {
    color: #007bff;
}

.hero p {
    font-size: 18px;
    color: #555;
    max-width: 800px;
    margin: 0 auto 40px;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
}

/* 特性概览 (网格) */
.section-title {
    text-align: center;
    margin: 80px 0 50px;
}

.section-title h2 {
    font-size: 32px;
    margin-bottom: 10px;
}

.section-title p {
    font-size: 16px;
    color: #777;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-bottom: 80px;
}

.card {
    background: #fff;
    padding: 40px 30px;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    text-align: center;
    transition: transform 0.3s;
}

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

.card h3 {
    font-size: 22px;
    margin-bottom: 15px;
    color: #333;
}

.card p {
    color: #666;
    font-size: 15px;
}

/* 详情页功能列表 */
.page-title {
    padding: 80px 20px 40px;
    background-color: #eef2f5;
}

.page-title h2 {
    font-size: 36px;
    margin-bottom: 15px;
}

.feature-item {
    padding: 60px 0;
    border-bottom: 1px solid #eaeaea;
}

.feature-text h3 {
    font-size: 26px;
    margin-bottom: 20px;
    color: #222;
}

.feature-text p {
    font-size: 16px;
    color: #555;
}

/* 下载页 */
.download-header {
    background: linear-gradient(135deg, #e0c3fc 0%, #8ec5fc 100%);
    color: #fff;
}

.download-header h2 {
    color: #fff;
}

.download-header strong {
    color: #ffe600;
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 40px;
    margin: 60px 0;
}

.download-card {
    background: #fff;
    padding: 50px;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.08);
    text-align: center;
}

.download-card h3 {
    font-size: 28px;
    margin-bottom: 10px;
}

.download-card p {
    color: #666;
    margin-bottom: 5px;
}

.version-info {
    font-size: 14px;
    color: #999;
    margin-bottom: 30px !important;
}

/* SEO 富文本区 */
.seo-content {
    background: #fff;
    padding: 60px;
    border-radius: 8px;
    margin-bottom: 80px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.02);
}

.seo-content article h2 {
    font-size: 28px;
    margin-bottom: 20px;
    color: #333;
}

.seo-content article h3 {
    font-size: 20px;
    margin-top: 30px;
    margin-bottom: 15px;
    color: #444;
}

.seo-content article p {
    margin-bottom: 15px;
    color: #555;
    font-size: 16px;
    line-height: 1.8;
}

/* 页脚 */
.footer {
    background-color: #222;
    color: #aaa;
    padding: 40px 20px;
    text-align: center;
}

.footer-links {
    margin-bottom: 20px;
}

.footer-links a {
    color: #ccc;
    margin: 0 10px;
}

.footer-links a:hover {
    color: #fff;
}

/* 响应式 */
@media (max-width: 768px) {
    .nav-wrapper {
        flex-direction: column;
        height: auto;
        padding: 20px 0;
        gap: 20px;
    }
    
    .hero h2 { font-size: 32px; }
    
    .cta-buttons {
        flex-direction: column;
        gap: 15px;
    }
    
    .grid-3, .grid-2 {
        grid-template-columns: 1fr;
    }
    
    .seo-content {
        padding: 30px 20px;
    }
}