/* 页面标题区域 */
        .page-header {
            padding: 150px 5% 80px;
            background: linear-gradient(135deg, #843f1c 0%, #411600 100%);
            color: white;
            text-align: center;
        }

        .page-header h1 {
            font-size: 3rem;
            margin-bottom: 20px;
        }

        .page-header p {
            font-size: 1.2rem;
            max-width: 700px;
            margin: 0 auto;
        }

        /* 公司简介区域 */
        .about-intro {
            padding: 100px 5%;
            background-color: white;
        }

        .intro-container {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
            max-width: 1200px;
            margin: 0 auto;
        }

        .intro-text h2 {
            font-size: 2.5rem;
            color: #2c3e50;
            margin-bottom: 25px;
        }

        .intro-text p {
            color: #7f8c8d;
            margin-bottom: 20px;
            font-size: 15px;
            line-height: 1.4em;
        }

        .cert-badges {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            margin-top: 30px;
        }

        .cert-badge {
            background-color: #f8f9fa;
            padding: 10px 20px;
            border-radius: 30px;
            font-size: 0.9rem;
            font-weight: 600;
            color: #843f1c;
            border: 1px solid #e1e8ed;
        }

        .intro-video {
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
        }

        .intro-video video {
            width: 100%;
            display: block;
        }

        /* 时间轴区域 */
        .timeline-section {
            padding: 100px 5%;
            background-color: #f8f9fa;
            font-size: 15px;
            line-height: 1.4em;
        }

        .section-title {
            text-align: center;
            margin-bottom: 60px;
        }

        .section-title h2 {
            
            margin-bottom: 15px;
        }

        .section-title p {
            color: #7f8c8d;
            max-width: 600px;
            margin: 0 auto;
        }

        .timeline {
            max-width: 1000px;
            margin: 0 auto;
            position: relative;
        }

        .timeline::before {
            content: '';
            position: absolute;
            top: 0;
            bottom: 0;
            left: 50%;
            width: 4px;
            background-color: #843f1c;
            transform: translateX(-50%);
        }

        .timeline-item {
            display: flex;
            margin-bottom: 100px;
            position: relative;
        }

        .timeline-item:nth-child(odd) {
            flex-direction: row-reverse;
        }

        .timeline-year {
            position: absolute;
            top: -30px;
            left: 50%;
            transform: translateX(-50%);
            background-color: #843f1c;
            color: white;
            padding: 8px 20px;
            border-radius: 30px;
            font-weight: 600;
            z-index: 2;
        }

        .timeline-content {
            width: 45%;
            background: white;
            padding: 25px;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
        }

        .timeline-item:nth-child(odd) .timeline-content {
            margin-right: 10%;
        }

        .timeline-item:nth-child(even) .timeline-content {
            margin-left: 10%;
        }

        .timeline-content h3 {
            font-size: 1.3rem;
            color: #2c3e50;
            margin-bottom: 10px;
        }

        .timeline-content p {
            color: #7f8c8d;
            line-height: 1.6;
        }

        /* 选择理由区域 */
        .reasons-section {
            padding: 100px 5%;
            background-color: white;
        }

        .reasons-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
            max-width: 1200px;
            margin: 0 auto;
        }

        .reason-card {
            background: #f8f9fa;
            border-radius: 10px;
            padding: 30px;
            text-align: center;
            transition: all 0.3s;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
        }

        .reason-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
            background: white;
        }

        .reason-icon {
            width: 70px;
            height: 70px;
            background: #843f1c;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
        }

        .reason-icon i {
            font-size: 30px;
            color: white;
        }

        .reason-card h3 {
            font-size: 1.3rem;
            margin-bottom: 15px;
            color: #2c3e50;
        }

        .reason-card p {
            color: #7f8c8d;
        }

        /* 认证图标区域 */
        .certifications-section {
            padding: 80px 5%;
            background-color: #f8f9fa;
        }

        .cert-grid {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 40px;
            margin-top: 40px;
        }

        .cert-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            max-width: 150px;
        }

        .cert-icon {
            width: 80px;
            height: 80px;
            background: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 15px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
        }

        .cert-icon i {
            font-size: 36px;
            color: #843f1c;
        }

        .cert-item p {
            text-align: center;
            font-weight: 600;
            color: #2c3e50;
        }


        /* 展会图片区域 */
        .exhibitions-section {
            padding: 100px 5%;
            background-color: #f8f9fa;
        }

        .gallery-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 20px;
            max-width: 1200px;
            margin: 0 auto;
        }

        .gallery-item {
            position: relative;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
            height: 250px;
        }

        .gallery-item img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s;
        }

        .gallery-item:hover img {
            transform: scale(1.1);
        }

        .gallery-overlay {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            background: rgba(44, 62, 80, 0.8);
            color: white;
            padding: 15px;
            transform: translateY(100%);
            transition: transform 0.3s;
        }

        .gallery-item:hover .gallery-overlay {
            transform: translateY(0);
        }

        .gallery-overlay h3 {
            font-size: 1.1rem;
            margin-bottom: 5px;
        }

        .gallery-overlay p {
            font-size: 0.9rem;
            opacity: 0.8;
        }

/* 响应式设计 */
        @media (max-width: 992px) {
            .intro-container {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            
            .timeline::before {
               
            }
            
            .timeline-item {
                flex-direction: row !important;
                margin-bottom:60px;
            }
            
            .timeline-year {
                left: calc(50% - 35px);;
                transform: none;
            }
            
            .timeline-content {
                width: calc(100%);
                margin-left: 0px !important;
                margin-right: 0 !important;
                padding: 15px;
            }   
        }

        @media (max-width: 768px) {
            .page-header h1 {
                font-size: 2.2rem;
            }
            
            
            
            .reasons-grid, .gallery-grid {
                grid-template-columns: 1fr;
            }            
            
        }

        @media (max-width: 576px) {
            .page-header h1 {
                font-size: 1.8rem;
            }
            
            .page-header p {
                font-size: 1rem;
            }
            
            .section-title h2 {
                font-size: 2rem;
            }
            
          
            
            .intro-text h2 {
                font-size: 2rem;
            }
        }