/* 平台介绍横幅 */
        .platform-banner {
            position: relative;
            height: 400px;
            background: linear-gradient(90deg, rgba(10, 35, 66, 0.8) 0%, rgba(10, 35, 66, 0.4) 100%), url('/jia/images/8.jpg');
            background-size: cover;
            background-position: center;
            display: flex;
            align-items: center;
            margin-bottom: 80px;
        }
        
        .banner-content {
            position: relative;
            max-width: 800px;
            padding: 40px;
            color: var(--light);
            animation: fadeInUp 1s ease;
        }
        
        .banner-content h1 {
            font-size: 3.2rem;
            margin-bottom: 20px;
            font-weight: 700;
            line-height: 1.2;
            text-shadow: 2px 2px 5px rgba(0, 0, 0, 0.3);
        }
        
        .banner-content p {
            font-size: 1.3rem;
            margin-bottom: 30px;
            max-width: 600px;
        }
        
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(40px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        
        /* 平台概述 */
        .platform-overview {
            padding: 100px 0;
            background: var(--light);
            position: relative;
        }
        
        .platform-overview::before {
            content: '';
            position: absolute;
            top: -50px;
            left: 0;
            width: 100%;
            height: 100px;
            background: var(--light);
            transform: skewY(-2deg);
        }
        
        .section-title {
            text-align: center;
            margin-bottom: 70px;
            position: relative;
        }
        
        .section-title h2 {
            font-size: 2.8rem;
            color: var(--primary-dark);
            display: inline-block;
            padding-bottom: 15px;
            position: relative;
            font-weight: 700;
        }
        
        .section-title h2::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 100px;
            height: 4px;
            background: var(--accent);
        }
        
        .overview-content {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }
        
        .overview-text {
            padding-right: 30px;
        }
        
        .overview-text p {
            margin-bottom: 25px;
            font-size: 1.15rem;
            line-height: 1.8;
            color: #444;
        }
        
        .overview-image {
            position: relative;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: var(--shadow-dark);
            transform: perspective(1000px) rotateY(-5deg);
            transition: transform 0.5s ease;
        }
        
        .overview-image:hover {
            transform: perspective(1000px) rotateY(0);
        }
        
        .overview-image img {
            width: 100%;
            height: auto;
            display: block;
        }
        
        /* 平台优势 */
        .platform-advantages {
            padding: 100px 0;
            background: linear-gradient(to bottom, var(--primary) 0%, var(--primary-dark) 100%);
            color: var(--light);
            position: relative;
        }
        
        .platform-advantages::before {
            content: '';
            position: absolute;
            top: -50px;
            left: 0;
            width: 100%;
            height: 100px;
            background: var(--primary);
            transform: skewY(-2deg);
        }
        
        .platform-advantages .section-title h2 {
            color: var(--light);
        }
        
        .advantages-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
            gap: 35px;
        }
        
        .advantage-card {
            background: rgba(255, 255, 255, 0.1);
            backdrop-filter: blur(10px);
            border-radius: 12px;
            overflow: hidden;
            box-shadow: var(--shadow-dark);
            transition: all 0.4s ease;
            border: 1px solid rgba(255, 255, 255, 0.1);
            padding: 30px;
            display: flex;
            flex-direction: column;
            align-items: center;
            text-align: center;
        }
        
        .advantage-card:hover {
            transform: translateY(-10px);
            background: rgba(255, 255, 255, 0.15);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.3);
        }
        
        .advantage-icon {
            width: 80px;
            height: 80px;
            background: var(--accent);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 25px;
            font-size: 2.2rem;
            color: var(--primary-dark);
        }
        
        .advantage-content h3 {
            color: var(--light);
            margin-bottom: 15px;
            font-size: 1.5rem;
            font-weight: 600;
        }
        
        .advantage-content p {
            color: rgba(255, 255, 255, 0.8);
            line-height: 1.7;
        }
        
        /* 平台特色 */
        .platform-features {
            padding: 100px 0;
            background: var(--light);
        }
        
        .features-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 40px;
        }
        
        .feature-item {
            background: white;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: var(--shadow-light);
            transition: all 0.4s ease;
            padding: 30px;
            text-align: center;
        }
        
        .feature-item:hover {
            transform: translateY(-8px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
        }
        
        .feature-icon {
            font-size: 2.5rem;
            color: var(--accent);
            margin-bottom: 20px;
        }
        
        .feature-item h3 {
            color: var(--primary-dark);
            margin-bottom: 15px;
            font-size: 1.4rem;
            font-weight: 600;
        }
        
        .feature-item p {
            color: #666;
            line-height: 1.6;
        }
        
        /* 平台服务流程 */
        .platform-process {
            padding: 100px 0;
            background: linear-gradient(to bottom, var(--primary-light) 0%, var(--primary) 100%);
            color: var(--light);
            position: relative;
        }
        
        .platform-process::before {
            content: '';
            position: absolute;
            top: -50px;
            left: 0;
            width: 100%;
            height: 100px;
            background: var(--primary-light);
            transform: skewY(-2deg);
        }
        
        .platform-process .section-title h2 {
            color: var(--light);
        }
        
        .process-steps {
            display: flex;
            justify-content: space-between;
            position: relative;
            margin-top: 60px;
        }
        
        .process-steps::before {
            content: '';
            position: absolute;
            top: 40px;
            left: 0;
            width: 100%;
            height: 3px;
            background: rgba(255, 255, 255, 0.3);
            z-index: 1;
        }
        
        .process-step {
            text-align: center;
            position: relative;
            z-index: 2;
            flex: 1;
        }
        
        .step-number {
            width: 80px;
            height: 80px;
            border-radius: 50%;
            background: var(--accent);
            color: var(--primary-dark);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.8rem;
            font-weight: bold;
            margin: 0 auto 20px;
            position: relative;
        }
        
        .step-content h3 {
            font-size: 1.4rem;
            margin-bottom: 15px;
            font-weight: 600;
        }
        
        .step-content p {
            color: rgba(255, 255, 255, 0.9);
            max-width: 250px;
            margin: 0 auto;
        }
        

        
        /* 响应式设计 */
        @media (max-width: 1200px) {
            .banner-content h1 {
                font-size: 2.8rem;
            }
        }
        
        @media (max-width: 992px) {
            .overview-content {
                grid-template-columns: 1fr;
                gap: 50px;
            }
            
            .overview-text {
                padding-right: 0;
            }
            
            .banner-content h1 {
                font-size: 2.5rem;
            }
            
            .process-steps {
                flex-direction: column;
                gap: 40px;
            }
            
            .process-steps::before {
                display: none;
            }
            
            .nav-menu {
                position: fixed;
                top: 80px;
                left: -100%;
                width: 100%;
                height: calc(100vh - 80px);
                background-color: var(--primary-dark);
                flex-direction: column;
                align-items: center;
                justify-content: flex-start;
                padding-top: 50px;
                transition: left 0.4s ease;
                gap: 30px;
            }
            
            .nav-menu.active {
                left: 0;
            }
            
            .mobile-menu-btn {
                display: block;
            }
            
            .platform-banner {
                height: 350px;
            }
        }
        
        @media (max-width: 768px) {
            .logo h1 {
                font-size: 1.6rem;
            }
            
            .banner-content h1 {
                font-size: 2.2rem;
            }
            
            .banner-content p {
                font-size: 1.1rem;
            }
            
            .section-title h2 {
                font-size: 2.2rem;
            }
            
            .advantages-grid,
            .features-container {
                grid-template-columns: 1fr;
            }
            
            .platform-banner {
                height: 300px;
            }
        }
        
        @media (max-width: 576px) {
            .logo h1 {
                font-size: 1.4rem;
            }
            
            .banner-content {
                padding: 20px;
            }
            
            .banner-content h1 {
                font-size: 1.8rem;
            }
            
            .section-title h2 {
                font-size: 1.8rem;
            }
            
            .platform-banner {
                height: 250px;
            }
            
            .footer-content {
                grid-template-columns: 1fr;
            }
        }