/* 页面标题区 */
        .page-header {
            background: linear-gradient(rgba(30, 58, 138, 0.9), rgba(30, 58, 138, 0.8)), url('https://images.unsplash.com/photo-1497366754035-f200968a6e72?ixlib=rb-4.0.3&auto=format&fit=crop&w=1600&q=80');
            background-size: cover;
            background-position: center;
            color: white;
            padding: 120px 0 80px;
        }
        
        @media (max-width: 992px) {
            .page-header {
                padding: 80px 0 60px;
            }
        }
        
        .page-title {
            font-size: 3rem;
            font-weight: 700;
            margin-bottom: 1rem;
        }
        
        @media (max-width: 768px) {
            .page-title {
                font-size: 2.2rem;
            }
        }
        
        .page-subtitle {
            font-size: 1.2rem;
            opacity: 0.9;
            max-width: 700px;
            margin: 0 auto;
        }
        
        /* 面包屑导航 */
        .breadcrumb {
            background-color: transparent;
            padding: 0;
            margin-bottom: 2rem;
        }
        
        .breadcrumb-item a {
            color: rgba(255, 255, 255, 0.8);
            text-decoration: none;
        }
        
        .breadcrumb-item.active {
            color: white;
        }
        
        /* 主要内容区 */
        .content-section {
            padding: 5rem 0;
        }
        
        .section-title {
            font-size: 2.5rem;
            font-weight: 700;
            margin-bottom: 1.5rem;
            color: #1E3A8A;
        }
        
        @media (max-width: 768px) {
            .section-title {
                font-size: 2rem;
            }
        }
        
        .section-subtitle {
            font-size: 1.2rem;
            color: #6B7280;
            margin-bottom: 3rem;
            max-width: 700px;
        }
        
        /* 材料特性 */
        .material-features {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 2rem;
            margin-bottom: 4rem;
        }
        
        @media (max-width: 992px) {
            .material-features {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        
        @media (max-width: 576px) {
            .material-features {
                grid-template-columns: 1fr;
            }
        }
        
        .feature-item {
            text-align: center;
            padding: 2rem 1.5rem;
            background-color: white;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            transition: transform 0.3s;
        }
        
        .feature-item:hover {
            transform: translateY(-5px);
        }
        
        .feature-icon {
            width: 70px;
            height: 70px;
            background-color: rgba(14, 165, 233, 0.1);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1.5rem;
            color: #0EA5E9;
            font-size: 1.8rem;
        }
        
        .feature-title {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 0.8rem;
        }
        
        /* 材料详细介绍 */
        .material-section {
            margin-bottom: 5rem;
        }
        
        .material-card {
            border-radius: 15px;
            overflow: hidden;
            box-shadow: 0 15px 40px rgba(0, 0, 0, 0.08);
            margin-bottom: 3rem;
            background-color: white;
        }
        
        .material-header {
            padding: 2rem 2.5rem;
            background-color: #F9FAFB;
            border-bottom: 1px solid #E5E7EB;
        }
        
        .material-title {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
            color: #1E3A8A;
        }
        
        .material-subtitle {
            color: #6B7280;
            margin-bottom: 0;
        }
        
        .material-body {
            padding: 2.5rem;
        }
        
        .material-content {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3rem;
        }
        
        @media (max-width: 768px) {
            .material-content {
                grid-template-columns: 1fr;
            }
        }
        
        .material-image {
            border-radius: 10px;
            overflow: hidden;
            height: 350px;
        }
        
        .material-img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s;
        }
        
        .material-image:hover .material-img {
            transform: scale(1.05);
        }
        
        .material-details {
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        
        .material-details h4 {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 1.5rem;
            color: var(--dark-gray);
        }
        
        .material-specs {
            list-style: none;
            padding: 0;
            margin: 0 0 2rem 0;
        }
        
        .material-specs li {
            margin-bottom: 0.8rem;
            padding-left: 1.5rem;
            position: relative;
        }
        
        .material-specs li:before {
            content: "✓";
            position: absolute;
            left: 0;
            color: var(--success-color);
            font-weight: bold;
        }
        
        .material-types {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            margin-bottom: 2rem;
        }
        
        .type-badge {
            background-color: #F9FAFB;
            color: #6B7280;
            padding: 0.5rem 1rem;
            border-radius: 20px;
            font-size: 0.9rem;
        }
        
        /* 比较表格 */
        .comparison-section {
            margin-bottom: 5rem;
        }
        
        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            border-radius: 10px;
            overflow: hidden;
        }
        
        .comparison-table th, .comparison-table td {
            padding: 1.5rem;
            text-align: left;
            border-bottom: 1px solid #E5E7EB;
        }
        
        .comparison-table th {
            background-color: #1E3A8A;
            color: white;
            font-weight: 600;
        }
        
        .comparison-table tr:last-child td {
            border-bottom: none;
        }
        
        .comparison-table tr:nth-child(even) {
            background-color: #F9FAFB;
        }
        
        .quality-rating {
            color: var(--warning-color);
            font-size: 1.2rem;
        }
        
        /* 工艺介绍 */
        .process-section {
            background-color: #F9FAFB;
            padding: 5rem 0;
            margin-bottom: 5rem;
        }
        
        .process-steps {
            display: flex;
            flex-direction: column;
            gap: 2rem;
            position: relative;
        }
        
        .process-steps:before {
            content: '';
            position: absolute;
            left: 40px;
            top: 0;
            bottom: 0;
            width: 2px;
            background-color: #0EA5E9;
            z-index: 1;
        }
        
        @media (max-width: 768px) {
            .process-steps:before {
                left: 30px;
            }
        }
        
        .process-step {
            display: flex;
            align-items: flex-start;
            position: relative;
            z-index: 2;
        }
        
        .step-number {
            width: 80px;
            height: 80px;
            background-color: #0EA5E9;
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 2rem;
            font-weight: 700;
            margin-right: 2rem;
            flex-shrink: 0;
        }
        
        @media (max-width: 768px) {
            .step-number {
                width: 60px;
                height: 60px;
                font-size: 1.5rem;
                margin-right: 1.5rem;
            }
        }
        
        .step-content {
            background-color: white;
            border-radius: 10px;
            padding: 2rem;
            flex-grow: 1;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
        }
        
        .step-title {
            font-size: 1.4rem;
            font-weight: 700;
            margin-bottom: 1rem;
            color: #1E3A8A;
        }
        
        /* 质量保障 */
        .quality-section {
            margin-bottom: 5rem;
        }
        
        .quality-cards {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 2rem;
        }
        
        @media (max-width: 992px) {
            .quality-cards {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        
        @media (max-width: 576px) {
            .quality-cards {
                grid-template-columns: 1fr;
            }
        }
        
        .quality-card {
            background-color: white;
            border-radius: 10px;
            padding: 2rem;
            text-align: center;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            transition: transform 0.3s;
            border: 1px solid #E5E7EB;
        }
        
        .quality-card:hover {
            transform: translateY(-10px);
            border-color: #0EA5E9;
        }
        
        .quality-icon {
            width: 80px;
            height: 80px;
            background-color: rgba(14, 165, 233, 0.1);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1.5rem;
            color: #0EA5E9;
            font-size: 2rem;
        }
        
        /* 常见问题 */
        .faq-section {
            padding: 5rem 0;
            background-color: #F9FAFB;
        }
        
        .faq-card {
            background-color: white;
            border-radius: 10px;
            padding: 2rem;
            margin-bottom: 1.5rem;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            transition: transform 0.3s;
        }
        
        .faq-card:hover {
            transform: translateY(-5px);
        }
        
        .faq-question {
            font-size: 1.2rem;
            font-weight: 600;
            margin-bottom: 1rem;
            color: var(--dark-gray);
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
        }
        
        .faq-answer {
            color: #6B7280;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
        }
        
        .faq-answer.show {
            max-height: 500px;
        }
        
        .faq-toggle {
            color: #0EA5E9;
            font-size: 1.5rem;
            transition: transform 0.3s;
        }
        
        .faq-toggle.rotated {
            transform: rotate(45deg);
        }
        
        /* CTA区域 */
        .cta-section {
            padding: 4rem 0;
        }
        
        .cta-card {
            background: linear-gradient(135deg, #1E3A8A, #0EA5E9);
            color: white;
            border-radius: 15px;
            padding: 4rem;
            text-align: center;
        }
        
        .cta-title {
            font-size: 2.5rem;
            font-weight: 700;
            margin-bottom: 1rem;
        }
        
        /* 按钮样式 */
        .btn-primary {
            background-color: #1E3A8A;
            border-color: #1E3A8A;
            padding: 0.75rem 2rem;
            font-weight: 500;
            border-radius: 8px;
        }
        
        .btn-primary:hover {
            background-color: #1e3a8ae6;
            border-color: #1e3a8ae6;
        }
        
        .btn-outline-light {
            border-radius: 8px;
            padding: 0.75rem 2rem;
            font-weight: 500;
        }
        
  
        
        /* 动画效果 */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        
        .fade-in-up {
            animation: fadeInUp 0.6s ease-out;
        }
        
        /* 响应式调整 */
        @media (max-width: 768px) {
            .material-header {
                padding: 1.5rem;
            }
            
            .material-body {
                padding: 1.5rem;
            }
            
            .material-title {
                font-size: 1.5rem;
            }
            
            .cta-card {
                padding: 3rem 1.5rem;
            }
            
            .cta-title {
                font-size: 2rem;
            }
        }