:root {
            --primary-color: #1890ff;
            --secondary-color: #40a9ff;
            --success-color: #52c41a;
            --warning-color: #faad14;
            --danger-color: #f5222d;
            --info-color: #13c2c2;
            --dark-color: #001529;
            --light-color: #f0f2f5;
            --border-color: #d9d9d9;
            --text-primary: #262626;
            --text-secondary: #8c8c8c;
            --bg-primary: #ffffff;
            --bg-secondary: #fafafa;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
            --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
            --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
        }

        /* 深色主题变量 */
        [data-theme="dark"] {
            --primary-color: #40a9ff;
            --secondary-color: #69c0ff;
            --light-color: #141414;
            --border-color: #303030;
            --text-primary: #ffffff;
            --text-secondary: #bfbfbf;
            --bg-primary: #000000;
            --bg-secondary: #1f1f1f;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
            --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
            --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            background-color: var(--light-color);
            min-height: 100vh;
            color: var(--text-primary);
            transition: all 0.3s ease;
            position: relative;
        }

        /* 背景装饰 */
        body::before {
            content: '';
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: 
                radial-gradient(circle at 10% 20%, rgba(24, 144, 255, 0.05) 0%, transparent 20%),
                radial-gradient(circle at 90% 80%, rgba(82, 196, 26, 0.05) 0%, transparent 20%),
                radial-gradient(circle at 50% 50%, rgba(250, 173, 20, 0.03) 0%, transparent 50%);
            z-index: -1;
        }

        /* 顶部导航栏重构 */
        .navbar {
            background: var(--bg-primary);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border-color);
            padding: 1rem 0;
            box-shadow: var(--shadow-sm);
            transition: all 0.3s ease;
        }

        .navbar-brand {
            font-size: 1.75rem;
            font-weight: 700;
            color: var(--primary-color) !important;
            display: flex;
            align-items: center;
            gap: 12px;
            letter-spacing: -0.5px;
        }

        .navbar-brand i {
            font-size: 2.25rem;
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .navbar-nav .nav-link {
            color: var(--text-secondary) !important;
            font-weight: 500;
            padding: 0.5rem 1rem !important;
            margin: 0 0.25rem;
            border-radius: 8px;
            transition: all 0.3s ease;
            position: relative;
        }

        .navbar-nav .nav-link:hover {
            color: var(--primary-color) !important;
            background: rgba(24, 144, 255, 0.1);
        }

        .navbar-nav .nav-link.active {
            color: var(--primary-color) !important;
            background: rgba(24, 144, 255, 0.1);
        }

        .navbar-nav .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: -8px;
            left: 50%;
            transform: translateX(-50%);
            width: 30px;
            height: 3px;
            background: var(--primary-color);
            border-radius: 2px;
        }

        /* 日夜切换按钮 */
        .theme-toggle {
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            color: var(--text-secondary);
            border-radius: 50%;
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all 0.3s ease;
            margin-left: 1rem;
        }

        .theme-toggle:hover {
            background: var(--primary-color);
            color: white;
            border-color: var(--primary-color);
            transform: scale(1.05);
        }

        /* 主要内容区域 */
        .submit-container {
            max-width: 900px;
            margin: 3rem auto;
            padding: 0 1rem;
        }

        .submit-header {
            text-align: center;
            margin-bottom: 3rem;
            position: relative;
        }

        .submit-title {
            font-size: 3rem;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 1rem;
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            position: relative;
            display: inline-block;
        }

        .submit-title::after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
            border-radius: 2px;
        }

        .submit-subtitle {
            font-size: 1.25rem;
            color: var(--text-secondary);
            max-width: 600px;
            margin: 2rem auto 0;
            line-height: 1.6;
        }

        /* 提交表单卡片 */
        .submit-card {
            background: var(--bg-primary);
            border-radius: 24px;
            box-shadow: var(--shadow-lg);
            padding: 3rem;
            margin-bottom: 3rem;
            border: 1px solid var(--border-color);
            position: relative;
            overflow: hidden;
        }

        .submit-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 6px;
            background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
        }

        .form-label {
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 0.75rem;
            font-size: 1rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .form-label i {
            color: var(--primary-color);
        }

        .form-control, .form-select {
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            color: var(--text-primary);
            padding: 0.875rem 1.25rem;
            border-radius: 12px;
            transition: all 0.3s ease;
            font-size: 1rem;
        }

        .form-control:focus, .form-select:focus {
            background: var(--bg-primary);
            border-color: var(--primary-color);
            color: var(--text-primary);
            box-shadow: 0 0 0 3px rgba(24, 144, 255, 0.1);
        }

        .form-text {
            color: var(--text-secondary);
            font-size: 0.875rem;
            margin-top: 0.5rem;
        }

        /* 获取TDK按钮 */
        .get-tdk-btn {
            background: var(--info-color);
            color: white;
            border: none;
            border-radius: 8px;
            padding: 0.5rem 1rem;
            font-size: 0.875rem;
            font-weight: 500;
            transition: all 0.3s ease;
            margin-left: 0.5rem;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }

        .get-tdk-btn:hover {
            background: #0a8ea0;
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }

        .get-tdk-btn:disabled {
            background: var(--text-secondary);
            cursor: not-allowed;
            transform: none;
        }

        .get-tdk-btn i {
            font-size: 1rem;
        }

        /* 图标选择器 */
        .icon-selector {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(70px, 1fr));
            gap: 1rem;
            margin-top: 1.5rem;
        }

        .icon-option {
            width: 70px;
            height: 70px;
            border-radius: 16px;
            background: var(--bg-secondary);
            border: 2px solid var(--border-color);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: all 0.3s ease;
            font-size: 1.75rem;
            color: var(--text-secondary);
            position: relative;
            overflow: hidden;
        }

        .icon-option::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(135deg, transparent, rgba(24, 144, 255, 0.1));
            opacity: 0;
            transition: opacity 0.3s ease;
        }

        .icon-option:hover {
            border-color: var(--primary-color);
            color: var(--primary-color);
            transform: translateY(-5px);
            box-shadow: var(--shadow-md);
        }

        .icon-option:hover::before {
            opacity: 1;
        }

        .icon-option.selected {
            background: var(--primary-color);
            border-color: var(--primary-color);
            color: white;
            transform: scale(1.05);
            box-shadow: 0 5px 15px rgba(24, 144, 255, 0.3);
        }

        /* 颜色选择器 */
        .color-selector {
            display: flex;
            gap: 1rem;
            margin-top: 1.5rem;
            flex-wrap: wrap;
        }

        .color-option {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            cursor: pointer;
            border: 3px solid transparent;
            transition: all 0.3s ease;
            position: relative;
        }

        .color-option:hover {
            transform: scale(1.1);
            box-shadow: var(--shadow-md);
        }

        .color-option.selected {
            border-color: var(--text-primary);
            box-shadow: 0 0 0 2px var(--bg-primary);
            transform: scale(1.15);
        }

        .color-option.selected::after {
            content: '✓';
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            color: white;
            font-weight: bold;
            text-shadow: 0 0 2px rgba(0,0,0,0.5);
        }

        /* 自定义颜色输入 */
        .custom-color-input {
            display: flex;
            align-items: center;
            gap: 1rem;
            margin-top: 1.5rem;
            padding: 1rem;
            background: var(--bg-secondary);
            border-radius: 12px;
            border: 1px solid var(--border-color);
        }

        .custom-color-input input[type="color"] {
            width: 60px;
            height: 40px;
            border: none;
            border-radius: 8px;
            cursor: pointer;
        }

        /* 提交按钮 */
        .submit-btn {
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            color: white;
            border: none;
            border-radius: 12px;
            padding: 1rem 2rem;
            font-size: 1.125rem;
            font-weight: 600;
            transition: all 0.3s ease;
            width: 100%;
            margin-top: 2rem;
            position: relative;
            overflow: hidden;
        }

        .submit-btn::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
            transition: left 0.5s;
        }

        .submit-btn:hover::before {
            left: 100%;
        }

        .submit-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 25px rgba(24, 144, 255, 0.3);
        }

        .submit-btn:disabled {
            background: var(--text-secondary);
            cursor: not-allowed;
            transform: none;
        }

        /* 规则说明卡片 */
        .rules-card {
            background: var(--bg-primary);
            border-radius: 24px;
            box-shadow: var(--shadow-lg);
            padding: 2.5rem;
            margin-bottom: 3rem;
            border: 1px solid var(--border-color);
            position: relative;
            overflow: hidden;
        }

        .rules-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 6px;
            height: 100%;
            background: linear-gradient(180deg, var(--warning-color), #ff7a45);
        }

        .rules-title {
            font-size: 1.75rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 2rem;
            display: flex;
            align-items: center;
            gap: 1rem;
        }

        .rules-title i {
            color: var(--warning-color);
            font-size: 2rem;
        }

        .rules-list {
            list-style: none;
            padding: 0;
        }

        .rules-list li {
            padding: 1rem 0;
            border-bottom: 1px solid var(--border-color);
            color: var(--text-primary);
            display: flex;
            align-items: flex-start;
            gap: 1rem;
            transition: all 0.3s ease;
        }

        .rules-list li:last-child {
            border-bottom: none;
        }

        .rules-list li:hover {
            padding-left: 0.5rem;
        }

        .rules-list li i {
            color: var(--primary-color);
            margin-top: 0.25rem;
            font-size: 1.25rem;
        }

        /* 预览卡片 */
        .preview-card {
            background: var(--bg-secondary);
            border-radius: 16px;
            padding: 2rem;
            margin-top: 2rem;
            border: 1px solid var(--border-color);
            position: relative;
            overflow: hidden;
        }

        .preview-card::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 100px;
            height: 100px;
            background: linear-gradient(135deg, transparent, rgba(24, 144, 255, 0.05));
            border-radius: 0 0 0 100%;
        }

        .preview-title {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 1.5rem;
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }

        .preview-title i {
            color: var(--primary-color);
        }

        .preview-site {
            background: var(--bg-primary);
            border: 1px solid var(--border-color);
            border-radius: 20px;
            padding: 2rem;
            text-align: center;
            text-decoration: none;
            color: var(--text-primary);
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
            cursor: pointer;
            display: block;
            margin: 0 auto;
            max-width: 220px;
            box-shadow: var(--shadow-sm);
        }

        .preview-site::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(135deg, transparent, rgba(24, 144, 255, 0.05));
            opacity: 0;
            transition: opacity 0.3s ease;
        }

        .preview-site:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-lg);
            border-color: var(--primary-color);
        }

        .preview-site:hover::before {
            opacity: 1;
        }

        .preview-icon {
            width: 70px;
            height: 70px;
            margin: 0 auto 1.5rem;
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 2rem;
            background: var(--bg-secondary);
            transition: all 0.3s ease;
        }

        .preview-site:hover .preview-icon {
            transform: scale(1.1) rotate(5deg);
        }

        .preview-name {
            font-size: 1.125rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .preview-desc {
            font-size: 0.875rem;
            color: var(--text-secondary);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        /* Toast样式 */
        .toast-container {
            position: fixed;
            top: 20px;
            right: 20px;
            z-index: 1050;
        }

        .toast {
            background: var(--bg-primary);
            border: 1px solid var(--border-color);
            color: var(--text-primary);
            border-radius: 12px;
            box-shadow: var(--shadow-lg);
            min-width: 280px;
            margin-bottom: 10px;
            overflow: hidden;
        }

        .toast-header {
            background: transparent;
            border-bottom: 1px solid var(--border-color);
            color: var(--text-primary);
        }

        .toast-body {
            padding: 15px;
        }

        .toast-success {
            border-left: 4px solid var(--success-color);
        }

        .toast-error {
            border-left: 4px solid var(--danger-color);
        }

        .toast-info {
            border-left: 4px solid var(--info-color);
        }

        .toast-warning {
            border-left: 4px solid var(--warning-color);
        }

        /* 成功提交页面 */
        .success-container {
            text-align: center;
            padding: 4rem 0;
            display: none;
        }

        .success-icon {
            width: 120px;
            height: 120px;
            background: linear-gradient(135deg, var(--success-color), #73d13d);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 3.5rem;
            margin: 0 auto 2.5rem;
            animation: scaleIn 0.6s ease, pulse 2s infinite;
            box-shadow: 0 10px 30px rgba(82, 196, 26, 0.3);
        }

        .success-title {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 1.5rem;
            background: linear-gradient(135deg, var(--success-color), #73d13d);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .success-message {
            font-size: 1.25rem;
            color: var(--text-secondary);
            margin-bottom: 3rem;
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
            line-height: 1.8;
        }

        .back-btn {
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            color: white;
            border: none;
            border-radius: 12px;
            padding: 1rem 2rem;
            font-size: 1.125rem;
            font-weight: 600;
            transition: all 0.3s ease;
            display: inline-flex;
            align-items: center;
            gap: 0.75rem;
            position: relative;
            overflow: hidden;
        }

        .back-btn::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
            transition: left 0.5s;
        }

        .back-btn:hover::before {
            left: 100%;
        }

        .back-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 25px rgba(24, 144, 255, 0.3);
        }

        /* 动画效果 */
        @keyframes scaleIn {
            from {
                transform: scale(0);
                opacity: 0;
            }
            to {
                transform: scale(1);
                opacity: 1;
            }
        }

        @keyframes pulse {
            0% {
                box-shadow: 0 0 0 0 rgba(82, 196, 26, 0.4);
            }
            70% {
                box-shadow: 0 0 0 15px rgba(82, 196, 26, 0);
            }
            100% {
                box-shadow: 0 0 0 0 rgba(82, 196, 26, 0);
            }
        }

        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .fade-in-up {
            animation: fadeInUp 0.8s ease forwards;
        }

        /* 响应式设计 */
        @media (max-width: 768px) {
            .submit-container {
                margin: 2rem auto;
            }
            
            .submit-title {
                font-size: 2.5rem;
            }
            
            .submit-card {
                padding: 2rem;
            }
            
            .rules-card {
                padding: 2rem;
            }
            
            .icon-selector {
                grid-template-columns: repeat(auto-fill, minmax(60px, 1fr));
                gap: 0.75rem;
            }
            
            .icon-option {
                width: 60px;
                height: 60px;
                font-size: 1.5rem;
            }
            
            .color-selector {
                gap: 0.75rem;
            }
            
            .color-option {
                width: 40px;
                height: 40px;
            }
            
            .custom-color-input {
                flex-direction: column;
                align-items: flex-start;
                gap: 0.75rem;
            }
            
            .preview-site {
                max-width: 180px;
                padding: 1.5rem;
            }
            
            .preview-icon {
                width: 60px;
                height: 60px;
                font-size: 1.75rem;
            }
            
            .get-tdk-btn {
                margin-left: 0;
                margin-top: 0.5rem;
            }
        }