/* ===== 页面头部样式 ===== */
        .page-header {
            background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
            color: white;
            padding: 180px 0 100px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .page-header h1 {
            font-size: 4.5rem;
            font-weight: 900;
            margin-bottom: 30px;
            text-shadow: 2px 2px 10px rgba(0, 0, 0, 0.2);
        }

        .page-header p {
            font-size: 1.5rem;
            max-width: 800px;
            margin: 0 auto 40px;
            text-shadow: 1px 1px 5px rgba(0, 0, 0, 0.2);
        }

        /* ===== 关于我们内容样式 ===== */
        .about-content {
            background-color: white;
            position: relative;
            overflow: hidden;
        }

        .about-container {
            display: flex;
            align-items: center;
            gap: 80px;
        }

        .about-text {
            flex: 1;
        }

        .about-text p {
            margin-bottom: 30px;
            font-size: 1.2rem;
            position: relative;
            padding-left: 25px;
        }

        .about-text p::before {
            content: '';
            position: absolute;
            left: 0;
            top: 12px;
            width: 10px;
            height: 10px;
            background: var(--primary);
            border-radius: 50%;
        }

        .about-image {
            flex: 1;
            border-radius: 0;
            overflow: hidden;
            box-shadow: var(--shadow);
            position: relative;
            transform: rotate(-2deg);
            transition: var(--transition);
        }

        .about-image:hover {
            transform: rotate(0deg);
        }

        .about-image::before {
            content: '';
            position: absolute;
            top: -15px;
            left: -15px;
            right: -15px;
            bottom: -15px;
            background: var(--accent);
            z-index: -1;
            opacity: 0.3;
        }

        .about-image img {
            width: 100%;
            height: auto;
            display: block;
            transition: transform 1s ease;
        }

        .about-image:hover img {
            transform: scale(1.05);
        }

        /* ===== 发展历程样式 ===== */
        .development-history {
            background: var(--light);
            position: relative;
            overflow: hidden;
        }

        .timeline {
            position: relative;
            max-width: 1200px;
            margin: 0 auto;
        }

        .timeline::after {
            content: '';
            position: absolute;
            width: 6px;
            background-color: var(--primary);
            top: 0;
            bottom: 0;
            left: 50%;
            margin-left: -3px;
        }

        .timeline-item {
            padding: 10px 40px;
            position: relative;
            width: 50%;
            box-sizing: border-box;
        }

        .timeline-item::after {
            content: '';
            position: absolute;
            width: 25px;
            height: 25px;
            right: -13px;
            background-color: white;
            border: 4px solid var(--primary);
            top: 15px;
            border-radius: 50%;
            z-index: 1;
        }

        .left {
            left: 0;
        }

        .right {
            left: 50%;
        }

        .left::before {
            content: " ";
            height: 0;
            position: absolute;
            top: 22px;
            width: 0;
            z-index: 1;
            right: 30px;
            border: medium solid white;
            border-width: 10px 0 10px 10px;
            border-color: transparent transparent transparent white;
        }

        .right::before {
            content: " ";
            height: 0;
            position: absolute;
            top: 22px;
            width: 0;
            z-index: 1;
            left: 30px;
            border: medium solid white;
            border-width: 10px 10px 10px 0;
            border-color: transparent white transparent transparent;
        }

        .right::after {
            left: -12px;
        }

        .timeline-content {
            padding: 20px 30px;
            background-color: white;
            position: relative;
            border-radius: 0;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }

        .timeline-content:hover {
            transform: translateY(-10px);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
        }

        .timeline-year {
            font-weight: 900;
            font-size: 2rem;
            color: var(--primary);
            margin-bottom: 10px;
        }

        /* ===== 服务理念样式 ===== */
        .service-philosophy {
            background-color: white;
            position: relative;
            overflow: hidden;
        }

        .philosophy-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 40px;
        }

        .philosophy-card {
            background: white;
            border-radius: 0;
            padding: 50px 30px;
            box-shadow: var(--shadow);
            transition: var(--transition);
            text-align: center;
            position: relative;
            z-index: 1;
            border: 1px solid rgba(0, 0, 0, 0.05);
        }

        .philosophy-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 0;
            background: var(--primary);
            transition: var(--transition);
            z-index: -1;
        }

        .philosophy-card:hover::before {
            height: 100%;
        }

        .philosophy-card:hover {
            transform: translateY(-20px);
            color: white;
            border-color: var(--primary);
        }

        .philosophy-card:hover .philosophy-icon {
            color: white;
            transform: scale(1.3) rotate(15deg);
        }

        .philosophy-card:hover h3 {
            color: white;
        }

        .philosophy-icon {
            font-size: 4rem;
            color: var(--primary);
            margin-bottom: 30px;
            transition: var(--transition);
        }

        .philosophy-card h3 {
            font-size: 1.6rem;
            color: var(--dark);
            margin-bottom: 20px;
            transition: var(--transition);
        }

        /* ===== 响应式设计 ===== */
        @media (max-width: 1200px) {
            .page-header h1 {
                font-size: 4rem;
            }
        }

        @media (max-width: 992px) {
            .page-header h1 {
                font-size: 3.5rem;
            }
            
            .about-container {
                flex-direction: column;
            }
            
            .timeline::after {
                left: 31px;
            }
            
            .timeline-item {
                width: 100%;
                padding-left: 70px;
                padding-right: 25px;
            }
            
            .timeline-item::before {
                left: 60px;
                border: medium solid white;
                border-width: 10px 10px 10px 0;
                border-color: transparent white transparent transparent;
            }
            
            .left::after, .right::after {
                left: 18px;
            }
            
            .right {
                left: 0%;
            }
        }

        @media (max-width: 768px) {
            .page-header {
                padding: 150px 0 80px;
            }
            
            .page-header h1 {
                font-size: 3rem;
            }
            
            .page-header p {
                font-size: 1.3rem;
            }
            
            .philosophy-grid {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 576px) {
            .page-header h1 {
                font-size: 2.5rem;
            }
            
            .page-header p {
                font-size: 1.1rem;
            }
        }