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

body {
    font-family: 'Microsoft YaHei', Arial, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    background: white;
    border-radius: 15px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.2);
    overflow: hidden;
}

.header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 0px;
    text-align: center;
}

    .header h1 {
        font-size: 2.5em;
        margin-bottom: 10px;
    }

.back-button {
    display: inline-block;
    margin-top: 20px;
    padding: 10px 20px;
    background: rgba(255,255,255,0.2);
    color: white;
    text-decoration: none;
    border-radius: 5px;
    transition: all 0.3s;
}

    .back-button:hover {
        background: rgba(255,255,255,0.3);
    }

.content {
    padding-top: 30px;
    padding-left: 30px;
    padding-right: 30px;
    padding-bottom: 0px;
}

.tool-content {
    text-align: center;
    margin-bottom: 0px;
    padding-bottom: 30px;
/*    border-bottom: 2px solid #e0e0e0;*/
}

.tool-icon-large {
    font-size: 3em;
    margin-bottom: 10px;
}

.tool-name-large {
    font-size: 2em;
    color: #333;
    margin-bottom: 10px;
}

.tool-description {
    font-size: 1.2em;
    color: #666;
    margin-bottom: 10px;
}

.tool-foot {
    font-size: 1em;
    color: #FFF;
    margin-bottom: 10px;
    text-align: center;
}

.tool-category {
    display: inline-block;
    padding: 5px 15px;
    background: #667eea;
    color: white;
    border-radius: 20px;
    font-size: 0.9em;
}

.tool-info {
    margin-top: 30px;
    padding: 20px;
    background: #f8f9fa;
    border-radius: 10px;
    min-height: 100px;
}

.tool-placeholder {
    text-align: center;
    padding: 20px 20px;
    color: #999;
    font-size: 1.2em;
}

    .tool-placeholder h3 {
        margin-bottom: 20px;
        color: #667eea;
    }

    .tool-placeholder p {
        line-height: 1.8;
    }