* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Microsoft Yahei", sans-serif;
}
body {
    background-color: #f5f7fa;
    color: #333;
    line-height: 1.6;
}
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}
header {
    background: linear-gradient(135deg, #2c3e50, #34495e);
    color: white;
    padding: 60px 0;
    text-align: center;
}
header h1 {
    font-size: 2.8rem;
    margin-bottom: 20px;
}
header p {
    font-size: 1.2rem;
    opacity: 0.9;
    max-width: 800px;
    margin: 0 auto;
}
.section {
    padding: 80px 0;
    background-color: white;
    margin-bottom: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}
.section-title {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 40px;
    color: #2c3e50;
    position: relative;
}
.section-title::after {
    content: "";
    display: block;
    width: 80px;
    height: 4px;
    background-color: #3498db;
    margin: 15px auto;
    border-radius: 2px;
}
/* 核心功能：2列网格，自动换行 */
.features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    margin-top: 40px;
}
.feature-card {
    padding: 30px;
    border-radius: 8px;
    background-color: #f8f9fa;
    border: 1px solid #eee;
    transition: transform 0.3s ease;
}
.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}
.feature-card h3 {
    color: #2c3e50;
    margin-bottom: 15px;
    font-size: 1.4rem;
}
.feature-card p {
    color: #666;
    font-size: 1rem;
}
/* 截图区域适配图片，自动两列排版 */
.screenshots {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 40px;
    margin-top: 40px;
}
.screenshot-card {
    text-align: center;
}
.screenshot-card img {
    width: 100%;
    border-radius: 8px;
    border: 1px solid #eee;
    box-shadow: 0 3px 10px rgba(0,0,0,0.1);
    cursor: pointer;
    transition: all 0.3s ease;
}
.screenshot-card img:hover {
    transform: scale(1.02);
    box-shadow: 0 5px 15px rgba(0,0,0,0.15);
}
.screenshot-card p {
    margin-top: 15px;
    font-size: 1.1rem;
    color: #444;
}
.download-btn {
    display: inline-block;
    margin-top: 10px;
    padding: 8px 15px;
    background-color: #3498db;
    color: white;
    text-decoration: none;
    border-radius: 4px;
    font-size: 0.9rem;
    transition: background-color 0.3s ease;
}
.download-btn:hover {
    background-color: #2980b9;
}
.cta-button {
    background-color: var(--primary);
    color: white;
    padding: 10px 25px;
    border-radius: 30px;
    font-weight: 600;
    transition: all 0.3s;
    border: none;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
}
.advantage {
    background-color: #f8f9fa;
    padding: 60px 0;
    margin-top: 40px;
    border-radius: 8px;
}
.advantage ul {
    max-width: 800px;
    margin: 0 auto;
    list-style: none;
}
.advantage li {
    padding: 15px 0;
    border-bottom: 1px solid #eee;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
}
.advantage li::before {
    content: "✓";
    color: #27ae60;
    font-size: 1.5rem;
    margin-right: 15px;
}
footer {
    background-color: #2c3e50;
    color: white;
    text-align: center;
    padding: 30px 0;
    margin-top: 40px;
}
footer p {
    opacity: 0.8;
}
/* 移动端适配 */
@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }
    .section-title {
        font-size: 1.6rem;
    }
    .features {
        grid-template-columns: 1fr;
    }
    .screenshots {
        grid-template-columns: 1fr;
    }
}