/* CSS Document */
/* 确保整个页面的 strong 标签加粗 */
strong, b {
	font-weight: 700;  /* 或 bold，700 等同于 bold */
}
.page-header-line-body p{
	text-indent: 2em;
}
.page-banner .lead {
    max-width: 800px;
    margin: 12px auto 0;
    font-size: 18px;
    opacity: 0.9;
    /* line-height: 1.8; */
}
.page-banner .lead a {
    color: #fff;
    text-decoration: underline;
}

 /* 右侧导航栏样式  right: 20px; */
        #side-nav {
            position: fixed;
            right: 5px;
            top: 55%;
            transform: translateY(-50%);
            width: 210px;
         /*   background-color: white;   transparent*/
			 background-color: white;
            border-radius: 8px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.12);
            padding: 20px 15px;
            z-index: 1000;
            max-height: 80vh;
            overflow-y: auto;
            transition: all 0.3s ease;
        }
        
        /* 导航栏标题 */
        .nav-title {
            font-size: 16px;
            font-weight: 600;
            color: #2c3e50;
            margin-bottom: 15px;
            padding-bottom: 10px;
            border-bottom: 2px solid #3498db;
            text-align: center;
        }
        
        /* 导航链接列表 */
        .nav-list {
            list-style: none;
            padding-left:4px;
        }
        
        .nav-item {
            margin-bottom: 8px;
            border-left: 3px solid transparent;
            transition: all 0.2s ease;
        }
        
        .nav-item:hover {
            border-left-color: #3498db;
        }
        
        .nav-item.active {
            border-left-color: #e74c3c;
        }
        
        .nav-link {
            display: block;
            padding: 8px 12px;
            color: #555;
            text-decoration: none;
            font-size: 14px;
            border-radius: 4px;
            transition: all 0.2s ease;
        }
        
        .nav-item:hover .nav-link {
            color: #2980b9;
            transform: translateX(3px);
        }
        
        .nav-item.active .nav-link {
            color: #e74c3c;
            font-weight: 600;
        }
        
      
        
        /* 响应式设计 */
        @media (max-width: 1200px) {
            #side-nav {
                width: 200px;
                right: 10px;
            }
        }
        
        @media (max-width: 992px) {
            #side-nav {
                position: static;
                transform: none;
                width: 100%;
                max-width: 400px;
                margin: 30px auto;
                max-height: none;
            }
            
            .content-container {
                margin-bottom: 30px;
            }
        }
        
        /* 返回顶部按钮 */
        #back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background-color: #3498db;
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            z-index: 999;
            box-shadow: 0 4px 12px rgba(52, 152, 219, 0.3);
            transition: all 0.3s ease;
            opacity: 0;
            visibility: hidden;
        }
        
        #back-to-top.show {
            opacity: 1;
            visibility: visible;
        }
        
        #back-to-top:hover {
            background-color: #2980b9;
            transform: translateY(-3px);
            box-shadow: 0 6px 15px rgba(52, 152, 219, 0.4);
        }

        /* 特色优势列表样式 */
        .feature-list {
            font-size: 15px;
            line-height: 2.2;
            padding-left: 15px;
            list-style: none;
        }
        .feature-list li {
            margin-bottom: 8px;
        }
        .feature-list .check-icon {
            color: #4CAF50;
            margin-right: 8px;
        }
        .feature-list strong {
            font-weight: 600;
        }

        /* VPS对比表格样式 */
        .compare-table-wrap {
            margin: 10px auto;
            max-width: 800px;
        }
        .compare-table {
            font-size: 13px;
        }
        .compare-table th {
            font-weight: 700;
        }
        .compare-table .td-key {
            font-weight: 600;
        }

        /* 推荐选择区块 */
        .recommend-well {
            margin-bottom: 15px;
            padding: 12px;
            background: #e3f2fd;
            border-color: #2196F3;
            font-size: 15px;
        }

        /* 优惠码区块 */
        .coupon-well {
            background: #ffecce;
            border-color: #FF9800;
            margin-bottom: 0;
            padding: 12px;
        }

        /* 通用提示卡片 */
        .tip-well {
            background: #f5f7fa;
            border-left: 3px solid #607D8B;
            border-radius: 4px;
            font-size: 14px;
            color: #555;
            line-height: 1.8;
            margin-top: 12px;
            padding: 12px 16px;
        }
        .tip-well p {
            margin: 0;
            text-indent: 0;
        }
        .tip-well p + p {
            margin-top: 4px;
        }

/* =============================================
   美国VPS推荐 - 售卖点卡片网格
   ============================================= */
.selling-point-grid {
    margin: 20px -10px;
}
.selling-point-card {
    padding: 25px 20px;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.08);
    text-align: center;
    margin-bottom: 20px;
    transition: transform 0.3s, box-shadow 0.3s;
    min-height: 220px;
}
.selling-point-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 6px 20px rgba(0,0,0,0.13);
}
.selling-point-icon {
    font-size: 40px;
    color: #2196F3;
    margin-bottom: 15px;
}
.selling-point-card h4 {
    font-size: 17px;
    font-weight: 700;
    color: #333;
    margin-bottom: 10px;
}
.selling-point-card p {
    font-size: 14px;
    color: #666;
    line-height: 1.7;
    text-indent: 0;
}
/* 交替配色 */
.selling-point-card:nth-child(2) .selling-point-icon { color: #4CAF50; }
.selling-point-card:nth-child(3) .selling-point-icon { color: #FF9800; }
.selling-point-card:nth-child(4) .selling-point-icon { color: #9C27B0; }
.selling-point-card:nth-child(5) .selling-point-icon { color: #E91E63; }
.selling-point-card:nth-child(6) .selling-point-icon { color: #00BCD4; }

/* =============================================
   线路类型说明卡片
   ============================================= */
.line-type-grid {
    margin: 20px -10px;
}
.line-type-card {
    padding: 20px 18px;
    border-radius: 8px;
    border-left: 4px solid #ccc;
    background: #fafafa;
    margin-bottom: 20px;
    transition: transform 0.2s;
}
.line-type-card:hover {
    transform: translateX(3px);
}
.line-type-card h4 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 10px;
    color: #333;
}
.line-type-card p {
    font-size: 14px;
    color: #555;
    line-height: 1.7;
    margin-bottom: 6px;
    text-indent: 0;
}
.line-type-card .line-badge {
    display: inline-block;
    padding: 2px 12px;
    border-radius: 4px;
    font-size: 13px;
    font-weight: 700;
    color: #fff;
    margin-right: 6px;
}
.line-type-card .line-providers {
    font-size: 13px;
    color: #888;
    margin-top: 8px;
}
/* 线路类型配色 */
.line-type-cn2 { border-left-color: #2196F3; background: #f0f7ff; }
.line-type-cn2 .line-badge { background: #2196F3; }
.line-type-cuii { border-left-color: #4CAF50; background: #f0fdf4; }
.line-type-cuii .line-badge { background: #4CAF50; }
.line-type-cmin2 { border-left-color: #FF9800; background: #fffaf0; }
.line-type-cmin2 .line-badge { background: #FF9800; }
.line-type-as4837 { border-left-color: #9e9e9e; background: #fafafa; }
.line-type-as4837 .line-badge { background: #9e9e9e; }

/* =============================================
   选购指南卡片
   ============================================= */
.selection-guide-grid {
    margin: 20px -10px;
}
.selection-guide-card {
    padding: 20px 15px;
    background: #fff;
    border: 1px solid #e8e8e8;
    border-radius: 8px;
    text-align: left;
    margin-bottom: 20px;
    transition: box-shadow 0.2s;
}
.selection-guide-card:hover {
    box-shadow: 0 3px 15px rgba(0,0,0,0.1);
}
.selection-guide-card .guide-icon {
    font-size: 28px;
    color: #3498db;
    margin-bottom: 10px;
}
.selection-guide-card h5 {
    font-size: 16px;
    font-weight: 700;
    color: #333;
    margin-bottom: 10px;
}
.selection-guide-card p {
    font-size: 13px;
    color: #666;
    line-height: 1.6;
    margin-bottom: 4px;
    text-indent: 0;
}
.selection-guide-card .guide-rationale {
    font-size: 13px;
    color: #888;
    font-style: italic;
    margin-top: 6px;
}

/* =============================================
   FAQ样式增强
   ============================================= */
.faq-title {
    font-size: 16px;
    font-weight: 700;
    color: #2c3e50;
    margin-top: 22px;
    margin-bottom: 8px;
    padding-left: 6px;
    border-left: 3px solid #3498db;
    text-indent: 0;
}
.faq-content {
    font-size: 14px;
    color: #555;
    line-height: 1.8;
    margin-bottom: 12px;
    padding-left: 10px;
    text-indent: 0;
}

/* =============================================
   CTA推荐区域
   ============================================= */
.cta-recommend {
    background: #e8f5e9;
    border-color: #4CAF50;
    font-size: 16px;
    padding: 18px;
}

/* =============================================
   响应式调整
   ============================================= */
@media (max-width: 991px) {
    .selling-point-card {
        min-height: auto;
    }
}
@media (max-width: 767px) {
    .line-type-card {
        padding: 15px 12px;
    }
    .line-type-card h4 {
        font-size: 15px;
    }
    .selection-guide-card {
        padding: 15px 12px;
    }
}