body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Microsoft YaHei', sans-serif;
            max-width: 800px;
            margin: 0 auto;
            padding: 20px;
            line-height: 1.6;
            background-color: #f5f7fa;
            color: #333;
        }
        .container {
            background: white;
            padding: 30px;
            border-radius: 12px;
            box-shadow: 0 2px 15px rgba(0,0,0,0.1);
        }
        h1 {
            /* color: #117de9; */
            color: #ffffffff;
            text-align: center;
            margin-top: 0;
            margin-bottom: 30px;
            font-size: 32px;
        }
        h2 {
            /* color: #2c3e50; */
            color: #ffffffff;
            margin-top: 40px;
            margin-bottom: 20px;
            font-size: 24px;
            border-bottom: 2px solid #117de9;
            padding-bottom: 10px;
        }
        .intro-section {
            background-color: #f8f9fa;
            padding: 25px;
            border-radius: 8px;
            margin-bottom: 30px;
            padding-top: 10px;
            padding-bottom: 10px;
            /* border-left: 4px solid #117de9; */
        }
        .intro-section p {
            margin-bottom: 15px;
            text-align: justify;
            font-size: 15px;
        }
        .modules-section {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            justify-content: center;
            margin-top: 40px;
        }
        .module-card {
            background: linear-gradient(135deg, #8fd2ffff 0%, #4172faff 100%);
            color: white;
            border-radius: 12px;
            padding: 30px;
            text-align: center;
            flex: 1;
            min-width: 200px;
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            cursor: pointer;
        }
        .module-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
        }
        .module-card h3 {
            margin-top: 0;
            margin-bottom: 15px;
            font-size: 20px;
        }
        .module-card p {
            font-size: 14px;
            opacity: 0.9;
            margin-bottom: 20px;
        }
        .module-button {
            background: white;
            color: #667eea;
            border: none;
            padding: 12px 24px;
            border-radius: 25px;
            font-size: 16px;
            font-weight: bold;
            cursor: pointer;
            transition: all 0.3s ease;
        }
        .module-button:hover {
            background: #f8f9fa;
            transform: scale(1.05);
        }
        /* 灰色模块样式 */
        .module-card-gray {
            background: linear-gradient(135deg, #e0e0e0 0%, #bdbdbd 100%);
            color: #333;
        }
        .module-card-gray:hover {
            transform: none;
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
            cursor: default;
        }
        .module-card-gray .module-button {
            background: #bdbdbd;
            color: #666;
        }
        .module-card-gray .module-button:hover {
            background: #bdbdbd;
            transform: none;
        }
        /* 小型待开放模块样式 */
        .module-card-small {
            padding: 15px;
            min-width: 140px;
        }
        
        /* 聊天模块特殊样式 */
        .module-card-chat {
            background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
        }
        
        /* 首页容器背景 */
        .container-home {
            background-image: url('../img/b5.png');
            background-repeat: repeat;
        }
        
        /* 首页标题样式 */
        .home-title {
            margin-bottom: 20px;
        }
        
        /* 英文副标题样式 */
        .english-subtitle {
            text-align: center;
            border-bottom: none;
            margin-top: -20px;
            color: #ffffffff;
            font-size: 14px;
        }
        
        /* 即将推出模块标题样式 */
        .coming-soon-title {
            text-align: center;
            border-bottom: none;
            margin-top: 0;
            margin-bottom: 10px;
            font-size: 18px;
            color: #ffffffff;
            width: 100%;
        }
        
        /* 介绍部分标题样式 */
        .intro-section-title {
            margin-top: 0;
            border-bottom: none;
            text-align: center;
            color: #2c3e50;
        }
        
        /* 退出登录按钮样式 */
        .header-with-logout {
            display: flex;
            justify-content: space-between;
            align-items: flex-start;
            margin-bottom: 20px;
        }
        
        .title-section {
            flex: 1;
        }
        
        .logout-button {
            background: rgba(255, 255, 255, 0.2);
            color: white;
            border: 1px solid rgba(255, 255, 255, 0.3);
            padding: 8px 16px;
            border-radius: 20px;
            font-size: 14px;
            cursor: pointer;
            transition: all 0.3s ease;
            backdrop-filter: blur(10px);
        }
        
        .logout-button:hover {
            background: rgba(255, 255, 255, 0.3);
            border-color: rgba(255, 255, 255, 0.5);
            transform: scale(1.05);
        }
        
        /* 页脚文本样式 */
        .footer-text {
            margin-top: 0;
            margin-bottom: 0;
        }
        .module-card-small h3 {
            font-size: 16px;
            margin-bottom: 10px;
        }
        .module-card-small p {
            font-size: 12px;
            margin-bottom: 10px;
        }
        .module-card-small .module-button {
            padding: 8px 16px;
            font-size: 14px;
        }
        .footer {
            text-align: center;
            margin-top: 40px;
            padding-top: 10px;
            border-top: 1px solid #e0e0e0;
            color: #ffffffff;
            font-size: 14px;
        }
        @media (max-width: 768px) {
            body {
                padding: 6px;
            }
            .container {
                padding: 20px;
            }
            h1 {
                font-size: 24px;
            }
            h2 {
                font-size: 20px;
            }
            .module-card {
                width: calc(50% - 10px);
                margin-bottom: 20px;
            }
        }