/* 基础样式 */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Microsoft YaHei', Arial, sans-serif;
        }
        
        body {
            background: linear-gradient(135deg, #0c0e1d 0%, #1a1f3a 100%);
            color: #e0e0ff;
            line-height: 1.6;
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        /* 导航栏样式 */
        header {
            background-color: #000;
            height: 90px;
            position: fixed;
            width: 100%;
            top: 0;
            z-index: 1000;
            transition: all 0.3s ease;
        }
        
        header.scrolled {
            background-color: rgba(0, 0, 0, 0.7);
            height: 90px;
        }
        
        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 100%;
        }
        
        .logo {
            height: 50px;
        }
        
        .nav-menu {
            display: flex;
            list-style: none;
        }
        
        .nav-menu li {
            margin-left: 25px;
        }
        
        .nav-menu a {
            color: #e0e0ff;
            text-decoration: none;
            font-size: 16px;
            font-weight: 500;
            transition: color 0.3s;
            padding: 5px 10px;
            border-radius: 4px;
        }
        
        .nav-menu a:hover {
            color: #FFD700;
        }
        
        .nav-menu a.active {
            color: #FFD700;
            background: rgba(255, 215, 0, 0.1);
        }
        
        .mobile-menu-btn {
            display: none;
            color: #e0e0ff;
            font-size: 24px;
            background: none;
            border: none;
            cursor: pointer;
        }
        
        /* 海报区域 */
        .banner {
            margin-top: 90px;
            height: 900px;
            background: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.7)), url('https://www.chishu2018.com/csb/banner1.webp');
            background-size: cover;
            background-position: center;
            display: flex;
            align-items: flex-end;
            position: relative;
        }
        
        .banner-content {
            width: 100%;
            padding: 40px 0;
            text-align: center;
            background: linear-gradient(transparent, rgba(128, 128, 128, 0));
        }
        
        .banner h1 {
            font-size: 48px;
            margin-bottom: 20px;
            text-shadow: 0 2px 10px rgba(0, 0, 0, 0.7);
            color: #FFD700;
        }
        
        .banner p {
            font-size: 20px;
            margin-bottom: 30px;
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
        }
        
        .price-tag {
            background: linear-gradient(45deg, #FFD700, #FFE55C);
            color: #000;
            display: inline-block;
            padding: 15px 30px;
            border-radius: 50px;
            font-size: 24px;
            font-weight: bold;
            box-shadow: 0 4px 15px rgba(255, 215, 0, 0.4);
            margin-bottom: 20px;
            transition: transform 0.3s;
        }
        
        .price-tag:hover {
            transform: scale(1.05);
        }
        
        .cta-button {
            display: inline-block;
            background: #4a00e0;
            color: white;
            padding: 15px 40px;
            border-radius: 50px;
            text-decoration: none;
            font-size: 18px;
            font-weight: bold;
            margin-top: 10px;
            transition: all 0.3s;
            box-shadow: 0 4px 15px rgba(74, 0, 224, 0.4);
        }
        
        .cta-button:hover {
            background: #5a1fe5;
            transform: translateY(-3px);
            box-shadow: 0 6px 20px rgba(74, 0, 224, 0.6);
        }
        
        /* 权益区域 - 修改为灰色系 */
        .benefits {
            padding: 80px 0;
            background: rgba(100, 100, 100, 0.1);
        }
        
        .section-title {
            text-align: center;
            margin-bottom: 60px;
            font-size: 36px;
            color: #FFD700;
            position: relative;
        }
        
        .section-title:after {
            content: '';
            display: block;
            width: 100px;
            height: 4px;
            background: #FFD700;
            margin: 15px auto;
            border-radius: 2px;
        }
        
        .benefits-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 40px;
        }
        
        .benefit-card {
            background: rgba(60, 60, 70, 0.7);
            border-radius: 15px;
            overflow: hidden;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
            transition: transform 0.3s, box-shadow 0.3s;
        }
        
        .benefit-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.4);
        }
        
        .benefit-img {
            height: 200px;
            background-size: cover;
            background-position: center;
            cursor: pointer;
            transition: transform 0.3s;
            position: relative;
        }
        
        .benefit-img:hover {
            transform: scale(1.03);
        }
        
        .benefit-content {
            padding: 25px;
        }
        
        .benefit-title {
            font-size: 22px;
            margin-bottom: 15px;
            color: #FFD700;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            flex-direction: column;
        }
        
        .benefit-title i {
            margin-right: 10px;
            font-size: 24px;
        }
        
        .benefit-desc {
            font-size: 16px;
            color: #c0c0e0;
            line-height: 1.6;
            text-align: left;
        }
        
        /* 数字图标样式 */
        .number-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: linear-gradient(45deg, #FFD700, #FFE55C);
            border-radius: 50%;
            margin-bottom: 10px;
            font-size: 20px;
            font-weight: bold;
            color: #000;
            box-shadow: 0 4px 8px rgba(255, 215, 0, 0.3);
        }
        
        /* 图片弹窗样式 - 修改关闭按钮位置和移除背光效果 */
        .modal {
            display: none;
            position: fixed;
            z-index: 2000;
            left: 0;
            top: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.9);
            animation: fadeIn 0.3s;
        }
        
        .modal-content {
            margin: auto;
            display: block;
            max-width: 90%;
            max-height: 90%;
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            border-radius: 10px;
            /* 移除背光效果 */
        }
        
        .close {
            position: absolute;
            top: 10px;
            right: 10px;
            color: #FFD700;
            font-size: 30px;
            font-weight: bold;
            cursor: pointer;
            transition: 0.3s;
            z-index: 2001;
            background: rgba(0, 0, 0, 0.5);
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
        }
        
        .close:hover {
            color: #fff;
            background: rgba(0, 0, 0, 0.8);
            transform: scale(1.1);
        }
        
        @keyframes fadeIn {
            from { opacity: 0; }
            to { opacity: 1; }
        }
        
        /* 目的区域 - 修改为灰色系 */
        .purpose {
            padding: 80px 0;
            background: rgba(80, 80, 90, 0.3);
            text-align: center;
        }
        
        .purpose-content {
            max-width: 800px;
            margin: 0 auto;
        }
        
        .purpose p {
            font-size: 18px;
            margin-bottom: 30px;
            line-height: 1.8;
        }
        
        .highlight {
            color: #FFD700;
            font-weight: bold;
        }
        
        /* 页脚 */
        footer {
            background: #0a0c1a;
            padding: 40px 0;
            text-align: center;
            border-top: 1px solid rgba(255, 215, 0, 0.2);
        }
        
        .footer-content {
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
        }
        
        .footer-section {
            flex: 1;
            min-width: 300px;
            margin-bottom: 30px;
        }
        
        .footer-section h3 {
            color: #FFD700;
            margin-bottom: 20px;
            font-size: 20px;
        }
        
        .footer-section p, .footer-section a {
            color: #a0a0c0;
            margin-bottom: 10px;
            display: block;
            text-decoration: none;
        }
        
        .footer-section a:hover {
            color: #FFD700;
        }
        
        .social-icons {
            display: flex;
            justify-content: center;
            margin-top: 20px;
        }
        
        .social-icons a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: rgba(255, 215, 0, 0.1);
            border-radius: 50%;
            margin: 0 10px;
            color: #FFD700;
            font-size: 18px;
            transition: all 0.3s;
        }
        
        .social-icons a:hover {
            background: #FFD700;
            color: white;
            transform: translateY(-5px);
        }
        
        .copyright {
            margin-top: 30px;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: #8080a0;
            font-size: 14px;
        }
        
        /* 响应式设计 */
        @media (max-width: 992px) {
            .banner h1 {
                font-size: 36px;
            }
            
            .banner p {
                font-size: 18px;
            }
            
            .benefits-grid {
                grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
                gap: 30px;
            }
        }
        
        @media (max-width: 768px) {
            .mobile-menu-btn {
                display: block;
            }
            
            .nav-menu {
                position: fixed;
                top: 90px;
                left: -100%;
                width: 100%;
                height: calc(100vh - 90px);
                background: rgba(0, 0, 0, 0.95);
                flex-direction: column;
                align-items: center;
                justify-content: flex-start;
                padding-top: 40px;
                transition: left 0.3s;
            }
            
            .nav-menu.active {
                left: 0;
            }
            
            .nav-menu li {
                margin: 15px 0;
            }
            
            .banner {
                height: 700px;
            }
            
            .banner h1 {
                font-size: 32px;
            }
            
            .banner p {
                font-size: 16px;
                padding: 0 20px;
            }
            
            .price-tag {
                font-size: 20px;
                padding: 12px 25px;
            }
            
            .cta-button {
                padding: 12px 30px;
                font-size: 16px;
            }
            
            .section-title {
                font-size: 30px;
            }
        }
        
        @media (max-width: 480px) {
            .banner {
                height: 650px;
            }
            
            .banner h1 {
                font-size: 28px;
            }
            
            .benefits-grid {
                grid-template-columns: 1fr;
            }
            
            .benefit-card {
                margin: 0 10px;
            }
        }