/* 全局重置 */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
        }

        /* 动态背景 */
        body {
            min-height: 100vh;
            display: flex;
            justify-content: center;
            align-items: center;
            background: linear-gradient(-45deg, #0f0c29, #302b63, #24243e, #141e30);
            background-size: 400% 400%;
            animation: gradientBG 15s ease infinite;
            color: #fff;
            padding: 20px 0; /* 防止内容过长贴边 */
        }

        @keyframes gradientBG {
            0% { background-position: 0% 50%; }
            50% { background-position: 100% 50%; }
            100% { background-position: 0% 50%; }
        }

        /* 玻璃拟态卡片容器 */
        .container {
            position: relative;
            width: 100%;
            max-width: 500px;
            padding: 40px;
            margin: 20px;
            background: rgba(255, 255, 255, 0.1);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-radius: 30px;
            border: 1px solid rgba(255, 255, 255, 0.2);
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.5);
            text-align: center;
            z-index: 1;
        }

        /* 装饰性光晕 */
        .container::before {
            content: '';
            position: absolute;
            top: -10%;
            left: -10%;
            width: 150px;
            height: 150px;
            background: #ff00cc;
            border-radius: 50%;
            filter: blur(80px);
            z-index: -1;
            opacity: 0.6;
        }

        .container::after {
            content: '';
            position: absolute;
            bottom: -10%;
            right: -10%;
            width: 150px;
            height: 150px;
            background: #3333ff;
            border-radius: 50%;
            filter: blur(80px);
            z-index: -1;
            opacity: 0.6;
        }

        /* 标题样式 */
        h1 {
            font-size: 2.2rem;
            margin-bottom: 10px;
            font-weight: 700;
            letter-spacing: 2px;
            background: linear-gradient(to right, #fff, #b3b3b3);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            text-shadow: 0 5px 15px rgba(0,0,0,0.3);
        }

        p.subtitle {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 30px;
        }

        /* 分类板块样式 */
        .category-section {
            margin-bottom: 25px;
            text-align: left;
        }

        .category-title {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 12px;
            padding-left: 10px;
            border-left: 4px solid #fff;
            display: flex;
            align-items: center;
            gap: 10px;
            text-shadow: 0 2px 5px rgba(0,0,0,0.3);
        }
        
        /* SVG 图标通用样式 */
        .icon-svg {
            width: 1.2em;
            height: 1.2em;
            fill: currentColor;
        }

        /* 按钮组样式 */
        .btn-group {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        /* 按钮基础样式 */
        .btn {
            position: relative;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 20px;
            text-decoration: none;
            color: #fff;
            border-radius: 12px;
            font-size: 0.95rem;
            font-weight: 500;
            transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
            overflow: hidden;
            border: 1px solid rgba(255,255,255,0.1);
            background: rgba(255, 255, 255, 0.05);
        }

        .btn span {
            flex-grow: 1;
            text-align: left;
            padding-left: 10px;
        }

        .btn .tag {
            font-size: 0.75rem;
            padding: 2px 6px;
            border-radius: 4px;
            background: rgba(255,255,255,0.2);
            margin-left: 5px;
        }

        /* ------ 主题颜色定义 ------ */

        /* GPT 系列 - 绿色/青色 */
        .theme-gpt .category-title { border-color: #10a37f; color: #10a37f; }
        .theme-gpt .btn:hover {
            background: linear-gradient(90deg, #10a37f, #0d8a6a);
            box-shadow: 0 0 15px rgba(16, 163, 127, 0.4);
            transform: translateX(5px);
            border-color: transparent;
        }

        /* Gemini 系列 - 蓝色/紫色 */
        .theme-gemini .category-title { border-color: #4285F4; color: #4285F4; }
        .theme-gemini .btn:hover {
            background: linear-gradient(90deg, #4285F4, #9b59b6);
            box-shadow: 0 0 15px rgba(66, 133, 244, 0.4);
            transform: translateX(5px);
            border-color: transparent;
        }

        /* 其他系列 - 橙色/红色 */
        .theme-other .category-title { border-color: #FF5722; color: #FF5722; }
        .theme-other .btn:hover {
            background: linear-gradient(90deg, #FF512F, #DD2476);
            box-shadow: 0 0 15px rgba(255, 87, 34, 0.4);
            transform: translateX(5px);
            border-color: transparent;
        }

        /* 按钮内的箭头动画 */
        .btn::after {
            content: '➜';
            font-size: 0.9rem;
            opacity: 0.5;
            transition: all 0.3s ease;
        }
        .btn:hover::after {
            opacity: 1;
            transform: translateX(3px);
        }

        /* 移动端适配 */
        @media (max-width: 600px) {
            .container {
                width: 90%;
                padding: 30px 20px;
                margin: 0;
            }
            h1 { font-size: 1.8rem; }
            .btn { padding: 12px 15px; }
        }