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

body {
    font-family: 'Microsoft YaHei', sans-serif;
    background-color: #f8f9fa;
    color: #333;
    line-height: 1.6;
}

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

header {
    margin-bottom: 40px;
    padding: 30px;
    background-color: #fff;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
}

.logo {
    width: 48px;
    height: 48px;
    flex-shrink: 0;
}

.header-text {
    text-align: left;
}

.header-text h1 {
    margin: 0;
}

.header-text p {
    margin: 5px 0 0 0;
    color: #6c757d;
}

h1 {
    font-size: 2.5rem;
    color: #2c3e50;
    font-weight: 300;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin-bottom: 40px;
}

.tool-card {
    background-color: #fff;
    border-radius: 12px;
    padding: 24px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    border: 1px solid #e9ecef;
}

.tool-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
}

.tool-card h2 {
    font-size: 1.4rem;
    color: #495057;
    margin-bottom: 12px;
    font-weight: 500;
}

.tool-card p {
    font-size: 0.95rem;
    color: #6c757d;
    margin-bottom: 20px;
    line-height: 1.5;
}

.tool-card .btn {
    display: inline-block;
    padding: 10px 20px;
    background-color: #e9ecef;
    color: #495057;
    text-decoration: none;
    border-radius: 8px;
    transition: all 0.3s ease;
    font-weight: 500;
    font-size: 0.9rem;
}

.tool-card .btn:hover {
    background-color: #dee2e6;
    transform: translateY(-1px);
}

@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: 15px;
    }
    
    .header-text {
        text-align: center;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    .tools-grid {
        grid-template-columns: 1fr;
    }
}