:root {
            --primary: #6366f1;
            --primary-dark: #4f46e5;
            --secondary: #ec4899;
            --dark: #0f172a;
            --light: #f8fafc;
            --gray: #64748b;
            --card-bg: #1e293b;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'Segoe UI', system-ui, sans-serif;
            background: var(--dark);
            color: var(--light);
            line-height: 1.6;
        }

        /* Navigation */
        nav {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            /* 液态玻璃效果 - 高透明度低模糊 */
            background: rgba(255, 255, 255, 0.03);
            backdrop-filter: blur(4px) saturate(100%);
            -webkit-backdrop-filter: blur(4px) saturate(100%);
            border-bottom: 0.5px solid rgba(255, 255, 255, 0.15);
            padding: 1rem 2rem;
            display: flex;
            justify-content: flex-start;
            align-items: center;
            gap: 3rem;
            z-index: 1000;
            transition: all 0.4s ease;
        }

        /* 导航栏顶部高光 */
        nav::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 50%;
            background: linear-gradient(
                180deg,
                rgba(255, 255, 255, 0.06) 0%,
                rgba(255, 255, 255, 0.01) 100%
            );
            pointer-events: none;
        }

        /* 导航栏底部薄边框 */
        nav::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 0.5px;
            background: linear-gradient(
                90deg,
                transparent 0%,
                rgba(255, 255, 255, 0.2) 50%,
                transparent 100%
            );
            pointer-events: none;
        }

nav .logo {
            height: 40px;
            width: auto;
        }

        nav .logo img {
            height: 100%;
            width: auto;
        }

        nav ul {
            display: flex;
            gap: 2rem;
            list-style: none;
            position: relative;
            z-index: 1;
        }

        nav ul li a {
            color: var(--light);
            text-decoration: none;
            font-weight: 500;
            transition: all 0.3s;
            opacity: 0.7;
            position: relative;
            padding: 0.4rem 0;
        }

        nav ul li a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            width: 0;
            height: 2px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            transition: all 0.3s;
            transform: translateX(-50%);
            border-radius: 2px;
        }

        nav ul li a:hover {
            color: var(--light);
            opacity: 1;
        }

        nav ul li a:hover::after {
            width: 100%;
        }

        /* Language Dropdown */
        .lang-dropdown {
            position: relative;
            margin-left: auto;
        }

        .lang-toggle {
            /* 液态玻璃样式 - 高透明度 */
            background: rgba(255, 255, 255, 0.03);
            backdrop-filter: blur(4px) saturate(100%);
            -webkit-backdrop-filter: blur(4px) saturate(100%);
            border: 0.5px solid rgba(255, 255, 255, 0.2);
            border-radius: 50px;

            color: var(--light);
            font-size: 0.9rem;
            font-weight: 500;
            cursor: pointer;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.6rem 1.2rem;
            transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            position: relative;
            overflow: hidden;
        }

        /* 语言按钮顶部高光 */
        .lang-toggle::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 50%;
            background: linear-gradient(
                180deg,
                rgba(255, 255, 255, 0.1) 0%,
                rgba(255, 255, 255, 0.02) 100%
            );
            pointer-events: none;
        }

        .lang-toggle:hover {
            background: rgba(255, 255, 255, 0.06);
            border-color: rgba(255, 255, 255, 0.35);
            transform: translateY(-2px);
        }

        .lang-toggle::after {
            content: '▼';
            font-size: 0.6rem;
            transition: transform 0.3s;
        }

        .lang-dropdown.open .lang-toggle::after {
            transform: rotate(180deg);
        }

        .lang-menu {
            position: absolute;
            top: calc(100% + 8px);
            right: 0;
            /* 液态玻璃菜单 - 高透明度 */
            background: rgba(255, 255, 255, 0.03);
            backdrop-filter: blur(4px) saturate(100%);
            -webkit-backdrop-filter: blur(4px) saturate(100%);
            border: 0.5px solid rgba(255, 255, 255, 0.15);
            border-radius: 16px;
            padding: 0.5rem;
            min-width: 140px;
            opacity: 0;
            visibility: hidden;
            transform: translateY(-10px) scale(0.95);
            transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            z-index: 1001;
            display: flex;
            flex-direction: column;
        }

        /* 菜单顶部高光 */
        .lang-menu::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 50%;
            background: linear-gradient(
                180deg,
                rgba(255, 255, 255, 0.05) 0%,
                rgba(255, 255, 255, 0.01) 100%
            );
            border-radius: inherit;
            pointer-events: none;
        }

        .lang-dropdown.open .lang-menu {
            opacity: 1;
            visibility: visible;
            transform: translateY(0) scale(1);
        }

        .lang-menu li {
            list-style: none;
            display: block;
        }

        .lang-menu li button {
            width: 100%;
            padding: 0.7rem 1rem;
            background: none;
            border: none;
            color: var(--light);
            text-align: left;
            cursor: pointer;
            font-size: 0.9rem;
            transition: all 0.3s;
            border-radius: 10px;
        }

        .lang-menu li button:hover {
            background: rgba(255, 255, 255, 0.08);
        }

        .lang-menu li button.active {
            background: rgba(255, 255, 255, 0.06);
            font-weight: 600;
        }

        /* Hero Section */
        #hero {
            height: 100vh;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            text-align: center;
            background: radial-gradient(ellipse at center, #1a1a2e 0%, var(--dark) 70%);
            padding: 2rem;
        }

        #hero h1 {
            font-size: 4rem;
            font-weight: 800;
            margin-bottom: 1rem;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            animation: fadeIn 1s ease-out;
        }

        #hero p {
            font-size: 1.25rem;
            color: var(--gray);
            margin-bottom: 2.5rem;
            animation: fadeIn 1s ease-out 0.2s both;
        }

        .hero-buttons {
            display: flex;
            gap: 1rem;
            animation: fadeIn 1s ease-out 0.4s both;
        }

        /* ==================== 液态玻璃 (Liquid Glass) ==================== */
        .liquid-glass {
            /* 玻璃基础属性 - 高透明度 */
            background: rgba(255, 255, 255, 0.03);
            backdrop-filter: blur(4px) saturate(100%);
            -webkit-backdrop-filter: blur(4px) saturate(100%);
            border: 0.5px solid rgba(255, 255, 255, 0.2);
            border-radius: 50px;

            /* 液态光泽效果 */
            position: relative;
            overflow: hidden;

            /* 第一层：顶部的冷调高光 */
            &::before {
                content: '';
                position: absolute;
                top: 0;
                left: 0;
                right: 0;
                height: 50%;
                background: linear-gradient(
                    180deg,
                    rgba(255, 255, 255, 0.12) 0%,
                    rgba(255, 255, 255, 0.02) 100%
                );
                border-radius: inherit;
                pointer-events: none;
            }

            /* 第二层：薄边框高光 */
            &::after {
                content: '';
                position: absolute;
                inset: 0;
                border-radius: inherit;
                padding: 0.5px;
                background: linear-gradient(
                    135deg,
                    rgba(255, 255, 255, 0.5) 0%,
                    rgba(255, 255, 255, 0.1) 50%,
                    rgba(255, 255, 255, 0.3) 100%
                );
                -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
                -webkit-mask-composite: xor;
                mask-composite: exclude;
                pointer-events: none;
            }
        }

        /* 液态玻璃按钮 */
        .btn-liquid {
            padding: 0.875rem 2rem;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            border: none;
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);

            /* 玻璃属性 - 高透明度低模糊 */
            background: rgba(255, 255, 255, 0.03);
            backdrop-filter: blur(4px) saturate(100%);
            -webkit-backdrop-filter: blur(4px) saturate(100%);
            border: 0.5px solid rgba(255, 255, 255, 0.2);
            color: var(--light);

            /* 液态光泽动效 */
            position: relative;
            overflow: hidden;

            /* 顶部高光层 */
            &::before {
                content: '';
                position: absolute;
                top: 0;
                left: 0;
                right: 0;
                height: 50%;
                background: linear-gradient(
                    180deg,
                    rgba(255, 255, 255, 0.15) 0%,
                    rgba(255, 255, 255, 0.02) 100%
                );
                pointer-events: none;
            }

            /* 薄边框光泽 */
            &::after {
                content: '';
                position: absolute;
                inset: 0;
                border-radius: inherit;
                padding: 0.5px;
                background: linear-gradient(
                    135deg,
                    rgba(255, 255, 255, 0.5) 0%,
                    rgba(255, 255, 255, 0.1) 50%,
                    rgba(255, 255, 255, 0.3) 100%
                );
                -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
                -webkit-mask-composite: xor;
                mask-composite: exclude;
                pointer-events: none;
            }

            &:hover {
                transform: translateY(-3px) scale(1.02);
                background: rgba(255, 255, 255, 0.06);
                border-color: rgba(255, 255, 255, 0.35);
            }

            &:active {
                transform: translateY(-1px) scale(0.98);
            }
        }

        /* 液态玻璃按钮 - 主要色变体 */
        .btn-liquid-primary {
            background: rgba(99, 102, 241, 0.08);
            border-color: rgba(99, 102, 241, 0.3);

            &::before {
                background: linear-gradient(
                    180deg,
                    rgba(99, 102, 241, 0.15) 0%,
                    rgba(99, 102, 241, 0.02) 100%
                );
            }

            &:hover {
                background: rgba(99, 102, 241, 0.15);
                border-color: rgba(99, 102, 241, 0.5);
            }
        }

        /* 液态玻璃按钮 - 次要色变体 */
        .btn-liquid-secondary {
            background: rgba(236, 72, 153, 0.08);
            border-color: rgba(236, 72, 153, 0.3);

            &::before {
                background: linear-gradient(
                    180deg,
                    rgba(236, 72, 153, 0.15) 0%,
                    rgba(236, 72, 153, 0.02) 100%
                );
            }

            &:hover {
                background: rgba(236, 72, 153, 0.15);
                border-color: rgba(236, 72, 153, 0.5);
            }
        }

        /* 液态玻璃按钮 - 幽灵变体（透明背景） */
        .btn-liquid-ghost {
            background: transparent;
            border-color: rgba(255, 255, 255, 0.2);

            &:hover {
                background: rgba(255, 255, 255, 0.06);
                border-color: rgba(255, 255, 255, 0.4);
            }
        }

        /* ==================== 原有按钮样式（保留兼容） ==================== */
        .btn {
            padding: 0.875rem 2rem;
            border-radius: 50px;
            font-weight: 600;
            text-decoration: none;
            transition: all 0.3s;
            cursor: pointer;
            border: none;
            font-size: 1rem;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: white;
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 30px rgba(99, 102, 241, 0.4);
        }

        .btn-secondary {
            background: transparent;
            color: var(--light);
            border: 2px solid rgba(255, 255, 255, 0.2);
        }

        .btn-secondary:hover {
            border-color: var(--primary);
            color: var(--primary);
        }

        /* Hero 区域使用液态玻璃按钮 */
        #hero .btn-liquid {
            min-width: 160px;
        }

        /* Tool Sections - 半透明玻璃效果，显示用户背景 + 色调 */
        .tool-section {
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            padding: 6rem 2rem;
            position: relative;
            overflow: hidden;
            background: rgba(15, 23, 42, 0.3) !important;
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
        }

        .tool-section:nth-child(odd) {
            background: rgba(15, 23, 42, 0.3) !important;
        }

        .tool-section:nth-child(even) {
            background: rgba(30, 41, 59, 0.3) !important;
        }

        /* 各 section 色调 */
        #ai { background: rgba(99, 102, 241, 0.15) !important; }
        #teaching-tools { background: rgba(59, 130, 246, 0.15) !important; }
        #html-ppt { background: rgba(168, 85, 247, 0.15) !important; }
        #games { background: rgba(34, 197, 94, 0.15) !important; }

        .tool-content {
            max-width: 800px;
            text-align: center;
            z-index: 1;
            background: rgba(15, 23, 42, 0.5);
            padding: 2rem;
            border-radius: 16px;
            backdrop-filter: blur(10px);
        }

        .tool-icon {
            font-size: 4rem;
            margin-bottom: 1.5rem;
        }

        .tool-section h2 {
            font-size: 2.5rem;
            margin-bottom: 1rem;
            color: var(--light);
        }

        .tool-section p {
            font-size: 1.125rem;
            color: var(--gray);
            margin-bottom: 2rem;
            line-height: 1.8;
        }

        .tool-section .btn {
            display: inline-block;
        }

        /* Section Backgrounds - 透明以显示用户背景 */
        #ai,
        #teaching-tools,
        #html-ppt,
        #games,
        #hero {
            background: transparent !important;
        }

        #ai::before {
            display: block;
            content: '';
            position: absolute;
            top: 20%;
            left: 10%;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(99, 102, 241, 0.08) 0%, transparent 70%);
            border-radius: 50%;
        }

        #teaching-tools::before {
            display: block;
            content: '';
            position: absolute;
            top: 30%;
            right: 15%;
            width: 250px;
            height: 250px;
            background: radial-gradient(circle, rgba(59, 130, 246, 0.08) 0%, transparent 70%);
            border-radius: 50%;
        }

        #html-ppt::before {
            display: block;
            content: '';
            position: absolute;
            bottom: 20%;
            left: 20%;
            width: 200px;
            height: 200px;
            background: radial-gradient(circle, rgba(168, 85, 247, 0.08) 0%, transparent 70%);
            border-radius: 50%;
        }

        #games::before {
            display: block;
            content: '';
            position: absolute;
            top: 40%;
            right: 25%;
            width: 280px;
            height: 280px;
            background: radial-gradient(circle, rgba(34, 197, 94, 0.08) 0%, transparent 70%);
            border-radius: 50%;
        }

        /* Footer */
        footer {
            background: transparent !important;
            padding: 3rem 2rem;
            text-align: center;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
        }

        footer p {
            color: var(--gray);
            margin-bottom: 0.5rem;
        }

        footer a {
            color: var(--primary);
            text-decoration: none;
        }

        footer a:hover {
            text-decoration: underline;
        }

        /* Back to Top Button */
        #back-to-top {
            position: fixed;
            right: 2rem;
            bottom: 2rem;
            width: 50px;
            height: 50px;
            background: var(--primary);
            color: white;
            border: none;
            border-radius: 50%;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s;
            z-index: 999;
            box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
        }

        #back-to-top.visible {
            opacity: 1;
            visibility: visible;
        }

        #back-to-top:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 20px rgba(99, 102, 241, 0.6);
        }

        /* Animations */
        @keyframes fadeIn {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        /* Mobile Responsive */
        @media (max-width: 768px) {
            nav {
                padding: 1rem;
                gap: 1.5rem;
            }

            nav .logo {
                font-size: 1.2rem;
            }

            nav ul {
                gap: 1rem;
            }

            nav ul li a {
                font-size: 0.9rem;
            }

            #hero h1 {
                font-size: 2.5rem;
            }

            #hero p {
                font-size: 1rem;
            }

            .hero-buttons {
                flex-direction: column;
                width: 100%;
                max-width: 280px;
            }

            .btn {
                width: 100%;
                text-align: center;
            }

            .tool-section {
                padding: 4rem 1.5rem;
            }

            .tool-section h2 {
                font-size: 1.75rem;
            }

            .tool-section p {
                font-size: 1rem;
            }

            .tool-icon {
                font-size: 3rem;
            }

            #back-to-top {
                right: 1rem;
                bottom: 1rem;
                width: 44px;
                height: 44px;
            }
        }

        @media (max-width: 480px) {
            nav ul {
                display: none;
            }

            #hero h1 {
                font-size: 2rem;
            }
        }

        /* ==================== WebGL 液态玻璃 Canvas ==================== */
        #liquid-glass-canvas {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            z-index: 6;
            pointer-events: none;
            opacity: 0;
            visibility: hidden;
        }

        #liquid-glass-canvas.active {
            opacity: 1;
            visibility: visible;
        }

        /* ==================== 画质设置下拉菜单 ==================== */

        /* WebGL 高画质模式 - 隐藏 CSS 玻璃，只保留文字 */
        .plain-element {
            background: rgba(255, 255, 255, 0.02) !important;
            backdrop-filter: none !important;
            -webkit-backdrop-filter: none !important;
            border: none !important;
            box-shadow: none !important;
        }

        .plain-element::before,
        .plain-element::after {
            display: none !important;
        }

        nav.plain-element {
            background: transparent !important;
            border-bottom: none !important;
        }
        .quality-dropdown {
            position: relative;
        }

        .quality-toggle {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 0.5rem 1rem;
            background: rgba(255, 255, 255, 0.03);
            backdrop-filter: blur(4px) saturate(100%);
            -webkit-backdrop-filter: blur(4px) saturate(100%);
            border: 0.5px solid rgba(255, 255, 255, 0.15);
            border-radius: 50px;
            color: var(--light);
            font-size: 0.85rem;
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .quality-toggle:hover {
            background: rgba(255, 255, 255, 0.06);
            border-color: rgba(255, 255, 255, 0.25);
        }

        .quality-icon {
            font-size: 1rem;
        }

        .quality-menu {
            position: absolute;
            top: calc(100% + 8px);
            right: 0;
            background: rgba(255, 255, 255, 0.03);
            backdrop-filter: blur(4px) saturate(100%);
            -webkit-backdrop-filter: blur(4px) saturate(100%);
            border: 0.5px solid rgba(255, 255, 255, 0.15);
            border-radius: 16px;
            padding: 0.5rem;
            min-width: 180px;
            opacity: 0;
            visibility: hidden;
            transform: translateY(-10px) scale(0.95);
            transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            z-index: 1001;
        }

        .quality-menu.open {
            opacity: 1;
            visibility: visible;
            transform: translateY(0) scale(1);
        }

        .quality-option {
            display: flex;
            flex-direction: column;
            align-items: flex-start;
            width: 100%;
            padding: 0.7rem 1rem;
            background: none;
            border: none;
            color: var(--light);
            cursor: pointer;
            transition: all 0.3s;
            border-radius: 10px;
            text-align: left;
        }

        .quality-option:hover {
            background: rgba(255, 255, 255, 0.06);
        }

        .quality-option.active {
            background: rgba(99, 102, 241, 0.15);
        }

        .quality-option .quality-name {
            font-size: 0.95rem;
            font-weight: 500;
        }

        .quality-option .quality-desc {
            font-size: 0.75rem;
            color: var(--gray);
            margin-top: 2px;
        }

        .quality-option.active .quality-name {
            color: var(--primary);
        }

        /* ==================== 登录按钮液态玻璃样式 ==================== */
        .login-register-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 0.65rem 1.5rem;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.9rem;
            text-decoration: none;
            transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);

            /* 液态玻璃属性 - 高透明度 */
            background: rgba(255, 255, 255, 0.03);
            backdrop-filter: blur(4px) saturate(100%);
            -webkit-backdrop-filter: blur(4px) saturate(100%);
            border: 0.5px solid rgba(255, 255, 255, 0.2);
            color: var(--light);

            position: relative;
            overflow: hidden;
        }

        /* 登录按钮顶部高光 */
        .login-register-btn::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 50%;
            background: linear-gradient(
                180deg,
                rgba(255, 255, 255, 0.1) 0%,
                rgba(255, 255, 255, 0.02) 100%
            );
            pointer-events: none;
        }

        .login-register-btn:hover {
            transform: translateY(-2px);
            background: rgba(255, 255, 255, 0.06);
            border-color: rgba(255, 255, 255, 0.35);
            color: var(--light);
        }

        /* 用户头像按钮 */
        .user-avatar-btn {
            background: rgba(255, 255, 255, 0.03) !important;
            backdrop-filter: blur(4px) saturate(100%);
            -webkit-backdrop-filter: blur(4px) saturate(100%);
            border: 0.5px solid rgba(255, 255, 255, 0.2);
            border-radius: 50%;
            cursor: pointer;
            padding: 0;
            transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            position: relative;
            overflow: hidden;
        }

        /* 头像按钮顶部高光 */
        .user-avatar-btn::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 50%;
            background: linear-gradient(
                180deg,
                rgba(255, 255, 255, 0.1) 0%,
                rgba(255, 255, 255, 0.02) 100%
            );
            border-radius: inherit;
            pointer-events: none;
        }

        .user-avatar-btn:hover {
            transform: scale(1.1);
            background: rgba(255, 255, 255, 0.06);
            border-color: rgba(255, 255, 255, 0.35);
        }

        .user-avatar-circle {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: linear-gradient(135deg, #6366f1, #ec4899) !important;
            color: white;
            font-weight: 600;
            font-size: 14px;
        }

        /* 用户下拉菜单 */
        .user-dropdown {
            position: absolute;
            top: calc(100% + 10px);
            right: 0;
            width: 200px;

            /* 液态玻璃效果 - 高透明度 */
            background: rgba(255, 255, 255, 0.03);
            backdrop-filter: blur(4px) saturate(100%);
            -webkit-backdrop-filter: blur(4px) saturate(100%);
            border: 0.5px solid rgba(255, 255, 255, 0.15);
            border-radius: 16px;
            padding: 0.5rem;
            opacity: 0;
            visibility: hidden;
            transform: translateY(-10px) scale(0.95);
            transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            z-index: 1000;
        }

        /* 用户菜单顶部高光 */
        .user-dropdown::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 50%;
            background: linear-gradient(
                180deg,
                rgba(255, 255, 255, 0.05) 0%,
                rgba(255, 255, 255, 0.01) 100%
            );
            border-radius: inherit;
            pointer-events: none;
        }

        .user-dropdown.active {
            opacity: 1;
            visibility: visible;
            transform: translateY(0) scale(1);
        }

        .user-dropdown-header {
            padding: 1rem;
            display: flex;
            flex-direction: column;
            gap: 4px;
            background: rgba(255, 255, 255, 0.03);
            border-radius: 12px;
            margin-bottom: 0.5rem;
        }

        .user-dropdown-header .user-name {
            color: var(--light);
            font-weight: 600;
            font-size: 14px;
        }

        .user-dropdown-header .user-email {
            color: var(--gray);
            font-size: 12px;
        }

        .user-dropdown-divider {
            height: 0.5px;
            background: rgba(255, 255, 255, 0.1);
            margin: 0.5rem 0;
        }

        .user-dropdown-item {
            display: block;
            width: 100%;
            padding: 0.7rem 1rem;
            background: none;
            border: none;
            color: #f85149;
            font-size: 14px;
            text-align: left;
            cursor: pointer;
            transition: all 0.3s;
            border-radius: 10px;
        }

        .user-dropdown-item:hover {
            background: rgba(248, 81, 73, 0.1);
        }