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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: #f5f7fa;
    line-height: 1.6;
    color: #333;
}

.header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 30px 40px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.header h1 {
    font-size: 2em;
    margin-bottom: 10px;
}

.header p {
    font-size: 1.1em;
    opacity: 0.95;
}

.content {
    padding: 40px;
}

.section {
    margin-bottom: 40px;
    background: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.section h2 {
    color: #333;
    font-size: 1.8em;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 3px solid #667eea;
}

.section h3 {
    color: #667eea;
    font-size: 1.3em;
    margin: 25px 0 15px 0;
}

.section p {
    margin-bottom: 15px;
    line-height: 1.8;
}

.info-box {
    background: #e3f2fd;
    border-left: 4px solid #2196f3;
    padding: 20px;
    margin: 20px 0;
    border-radius: 5px;
}

.warning-box {
    background: #fff3cd;
    border-left: 4px solid #ffc107;
    padding: 20px;
    margin: 20px 0;
    border-radius: 5px;
}

.success-box {
    background: #d4edda;
    border-left: 4px solid #28a745;
    padding: 20px;
    margin: 20px 0;
    border-radius: 5px;
}

.danger-box {
    background: #f8d7da;
    border-left: 4px solid #dc3545;
    padding: 20px;
    margin: 20px 0;
    border-radius: 5px;
}

.code-block {
    background: #2d2d2d;
    color: #f8f8f2;
    padding: 20px;
    border-radius: 8px;
    overflow-x: auto;
    margin: 15px 0;
    font-family: 'Courier New', 'Monaco', monospace;
    font-size: 0.9em;
    line-height: 1.6;
    white-space: pre-wrap;
}

.code-block pre {
    margin: 0;
    background: transparent;
    color: inherit;
    font-family: inherit;
    font-size: inherit;
    white-space: pre;
}

.step-list {
    counter-reset: step-counter;
    list-style: none;
    padding-left: 0;
}

.step-list li {
    counter-increment: step-counter;
    padding: 20px;
    margin: 15px 0;
    background: #f8f9fa;
    border-radius: 8px;
    border-left: 4px solid #667eea;
    position: relative;
    padding-left: 80px;
}

.step-list li:before {
    content: "步骤 " counter(step-counter);
    position: absolute;
    left: 20px;
    top: 20px;
    background: #667eea;
    color: white;
    padding: 5px 15px;
    border-radius: 20px;
    font-weight: bold;
    font-size: 0.9em;
}

.feature-list {
    list-style: none;
    padding-left: 0;
}

.feature-list li {
    padding: 10px 0 10px 30px;
    position: relative;
    line-height: 1.8;
}

.feature-list li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: #28a745;
    font-weight: bold;
    font-size: 1.2em;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
}

th, td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid #dee2e6;
}

th {
    background: #f8f9fa;
    font-weight: 600;
    color: #495057;
}

tr:hover {
    background: #f8f9fa;
}

.badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 0.85em;
    font-weight: 500;
}

.badge-success {
    background: #d4edda;
    color: #155724;
}

.badge-danger {
    background: #f8d7da;
    color: #721c24;
}

.badge-warning {
    background: #fff3cd;
    color: #856404;
}

.badge-info {
    background: #d1ecf1;
    color: #0c5460;
}

/* 响应式 */
@media (max-width: 768px) {
    .content {
        padding: 20px;
    }
    
    .section {
        padding: 20px;
    }
    
    .header {
        padding: 20px;
    }
    
    .step-list li {
        padding-left: 20px;
    }
    
    .step-list li:before {
        position: static;
        display: block;
        margin-bottom: 10px;
    }
}