/* 标准页面专用样式 */
.standards-main {
    padding: 40px 0;
    min-height: 60vh;
}

.standards-container {
    display: flex;
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

/* 边栏导航 */
.standards-sidebar {
    flex: 0 0 250px;
    position: sticky;
    top: 80px;
    max-height: calc(100vh - 100px);
    overflow-y: auto;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    padding: 20px;
}

.standards-sidebar h2 {
    font-size: 18px;
    margin: 0 0 20px 0;
    padding-bottom: 10px;
    border-bottom: 2px solid #fb6c00;
    color: #333;
}

.standards-nav {
    list-style: none;
    padding: 0;
    margin: 0;
}

.standards-nav li {
    margin-bottom: 8px;
}

.standards-nav a {
    display: block;
    padding: 10px 15px;
    color: #666;
    text-decoration: none;
    border-radius: 4px;
    transition: all 0.3s;
    border-left: 3px solid transparent;
}

.standards-nav a:hover,
.standards-nav a:focus {
    background: #f5f5f5;
    color: #fb6c00;
    border-left-color: #fb6c00;
    outline: 2px solid #fb6c00;
    outline-offset: 2px;
}

.standards-nav a.active {
    background: #fff5e6;
    color: #fb6c00;
    border-left-color: #fb6c00;
    font-weight: 600;
}

/* 内容区域 */
.standards-content {
    flex: 1;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    padding: 40px;
}

.standards-content h1 {
    color: #fb6c00;
    margin-bottom: 20px;
    font-size: 32px;
}

.standards-content h2 {
    color: #333;
    margin-top: 40px;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid #e0e0e0;
    font-size: 24px;
    scroll-margin-top: 100px;
}

.standards-content h3 {
    color: #555;
    margin-top: 30px;
    margin-bottom: 15px;
    font-size: 20px;
}

.standards-content p {
    line-height: 1.8;
    margin-bottom: 15px;
    color: #666;
}

.standards-content ul,
.standards-content ol {
    margin-bottom: 20px;
    padding-left: 30px;
}

.standards-content li {
    line-height: 1.8;
    margin-bottom: 10px;
    color: #666;
}

/* 表格样式 */
.standards-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    background: #fff;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.standards-content table th,
.standards-content table td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid #e0e0e0;
}

.standards-content table th {
    background: #fb6c00;
    color: #fff;
    font-weight: 600;
}

.standards-content table tr:hover {
    background: #f9f9f9;
}

.standards-content table td strong {
    color: #fb6c00;
}

/* 重点信息框 */
.info-box {
    background: #fff5e6;
    border-left: 4px solid #fb6c00;
    padding: 20px;
    margin: 20px 0;
    border-radius: 4px;
}

.info-box h4 {
    margin-top: 0;
    color: #fb6c00;
    font-size: 18px;
}

/* CTA 按钮框 */
.cta-box {
    background: linear-gradient(135deg, #fb6c00 0%, #FF8930 100%);
    color: #fff;
    padding: 30px;
    border-radius: 8px;
    margin: 30px 0;
    text-align: center;
}

.cta-box p {
    color: #fff;
    font-size: 18px;
    margin-bottom: 20px;
    font-weight: 600;
}

.cta-box input[type="text"] {
    padding: 12px 20px;
    border: none;
    border-radius: 4px;
    width: 70%;
    max-width: 400px;
    font-size: 16px;
    margin-right: 10px;
}

.cta-box button {
    padding: 12px 30px;
    background: #fff;
    color: #fb6c00;
    border: none;
    border-radius: 4px;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s;
}

.cta-box button:hover {
    background: #f0f0f0;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

.cta-box button:focus {
    outline: 2px solid #fff;
    outline-offset: 2px;
}

.cta-box small {
    display: block;
    margin-top: 15px;
    color: rgba(255,255,255,0.9);
    font-size: 14px;
}

.case-study {
    background: #f9f9f9;
    border-left: 4px solid #fb6c00;
    padding: 20px;
    margin: 20px 0;
    border-radius: 4px;
}

.case-study h4 {
    margin-top: 0;
    color: #fb6c00;
}

.skip-link {
    position: absolute;
    left: -9999px;
    z-index: 999;
}

.skip-link:focus {
    left: 50%;
    transform: translateX(-50%);
    top: 10px;
    padding: 10px 20px;
    background: #fb6c00;
    color: #fff;
    text-decoration: none;
    border-radius: 4px;
}

/* 响应式设计 */
@media (max-width: 991px) {
    .standards-container {
        flex-direction: column;
    }
    
    .standards-sidebar {
        position: relative;
        top: 0;
        max-height: none;
    }
    
    .standards-content {
        padding: 20px;
    }
    
    .cta-box input[type="text"] {
        width: 100%;
        margin-bottom: 10px;
        margin-right: 0;
    }
}

@media (max-width: 767px) {
    .standards-main {
        padding: 20px 0;
    }
    
    .standards-content h1 {
        font-size: 24px;
    }
    
    .standards-content h2 {
        font-size: 20px;
    }
}