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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #333;
    background: #f8f9fa;
}

/* 头部样式 */
.header {
    background: linear-gradient(135deg, rgba(46, 204, 113, 0.9), rgba(39, 174, 96, 0.9));
    padding: 40px 20px;
    text-align: center;
    color: white;
}

.header h1 {
    font-size: 2.5rem;
    margin-bottom: 15px;
}

/* 内容区域样式 */
.content {
    max-width: 900px;
    margin: 40px auto;
    padding: 0 20px;
}

.guide-card {
    background: white;
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    margin-bottom: 30px;
}

.guide-section {
    margin-bottom: 40px;
}

.guide-section h2 {
    color: #2c3e50;
    font-size: 1.8rem;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid #eee;
}

.guide-section h3 {
    color: #34495e;
    font-size: 1.4rem;
    margin: 25px 0 15px;
}

/* 图片样式 */
.guide-image {
    margin: 20px 0;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.guide-image img {
    width: 100%;
    height: auto;
    display: block;
}

/* 提示框样式 */
.tip-box {
    background: #e8f5e9;
    border-left: 4px solid #27ae60;
    padding: 15px 20px;
    margin: 20px 0;
    border-radius: 4px;
}

.tip-box strong {
    color: #2e7d32;
    display: block;
    margin-bottom: 8px;
}

/* 返回按钮 */
.back-button {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: #27ae60;
    color: white;
    text-decoration: none;
    border-radius: 8px;
    margin-bottom: 20px;
    transition: all 0.3s ease;
}

.back-button:hover {
    background: #219a52;
    transform: translateY(-2px);
}

/* 高亮标记 */
mark {
    background: #fff3cd;
    padding: 2px 5px;
    border-radius: 3px;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .header h1 {
        font-size: 2rem;
    }

    .guide-card {
        padding: 20px;
    }
}

/* 步骤列表样式 */
.steps {
    list-style: none;
    counter-reset: step-counter;
    padding-left: 0;
}

.steps li {
    counter-increment: step-counter;
    margin-bottom: 30px;
    position: relative;
    padding-left: 45px;
}

.steps li::before {
    content: counter(step-counter);
    position: absolute;
    left: 0;
    top: 0;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: #27ae60;
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
}

.steps h3 {
    margin-top: 0;
}

/* 底部导航样式 */
.guide-nav {
    margin-top: 40px;
    padding: 30px;
    background: white;
    border-radius: 15px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.guide-nav h3 {
    color: #2c3e50;
    font-size: 1.4rem;
    margin-bottom: 20px;
}

.guide-nav-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
}

.guide-nav-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 20px;
    border-radius: 10px;
    background: #f8f9fa;
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

.guide-nav-item:hover {
    background: #e9ecef;
    transform: translateY(-2px);
}

.guide-nav-icon {
    font-size: 1.8rem;
}

.guide-nav-text h4 {
    margin: 0;
    color: #2c3e50;
}

.guide-nav-text p {
    margin: 5px 0 0;
    font-size: 0.9rem;
    color: #666;
}

@media (max-width: 768px) {
    .guide-nav {
        padding: 20px;
    }
}

/* 作者署名样式 */
.author-note {
    margin-top: 40px;
    padding-top: 20px;
    border-top: 1px solid #eee;
    color: #666;
    font-style: italic;
    text-align: right;
}