:root {
            --primary: #0066ff;
            --hover: #3385ff;
            --bg: #f0f5ff;
            --text: #1a1a1a;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
            background: var(--bg);
            min-height: 100vh;
            display: flex;
            justify-content: center;
            align-items: center;
            padding: 20px;
        }

        .container {
            width: 100%;
            max-width: 480px;
            background: white;
            border-radius: 20px;
            box-shadow: 0 10px 30px rgba(0, 102, 255, 0.1);
            overflow: hidden;
        }

        .header {
            background: linear-gradient(135deg, var(--primary), var(--hover));
            padding: 30px;
            color: white;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .header::after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 0;
            right: 0;
            height: 20px;
            background: white;
            border-radius: 50% 50% 0 0;
        }

        .header h1 {
            font-size: 22px;
            font-weight: 600;
            margin-bottom: 8px;
        }

        .header p {
            opacity: 0.9;
            font-size: 14px;
        }

        .content {
            padding: 24px;
            display: grid;
            gap: 16px;
        }

        .avatar-button {
            display: flex;
            align-items: center;
            padding: 16px;
            background: white;
            border: 1px solid #eef2ff;
            border-radius: 12px;
            cursor: pointer;
            transition: all 0.3s ease;
            text-decoration: none;
            color: var(--text);
        }

        .avatar-button:hover {
            border-color: var(--primary);
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(0, 102, 255, 0.1);
        }

        .avatar-icon {
            width: 42px;
            height: 42px;
            background: linear-gradient(135deg, var(--primary), var(--hover));
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-right: 16px;
            color: white;
            font-size: 18px;
            transition: all 0.3s ease;
        }

        .avatar-button:hover .avatar-icon {
            transform: scale(1.1);
        }

        .avatar-info {
            flex-grow: 1;
        }

        .avatar-name {
            font-weight: 600;
            margin-bottom: 4px;
            font-size: 15px;
            color: #333;
        }

        .avatar-hint {
            font-size: 13px;
            color: #666;
        }

        .copy-icon {
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #666;
            font-size: 16px;
            border-radius: 10px;
            transition: all 0.3s ease;
        }

        .avatar-button:hover .copy-icon {
            background: #f0f7ff;
            color: var(--primary);
        }

        .toast {
            position: fixed;
            top: 20px;
            left: 50%;
            transform: translateX(-50%);
            padding: 12px 24px;
            background: #333;
            color: white;
            border-radius: 50px;
            font-size: 14px;
            display: flex;
            align-items: center;
            gap: 8px;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
            z-index: 1000;
        }

        .toast i {
            color: #4ade80;
        }

        @media (max-width: 480px) {
            .container {
                margin: 10px;
            }
        }