:root {
            --primary-dark: #0a0a0a;
            --secondary-dark: #121212;
            --accent-green: #00ff88;
            --accent-blue: #00aaff;
            --text-primary: #f0f0f0;
            --text-secondary: #b0b0b0;
        }
        
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background-color: var(--primary-dark);
            color: var(--text-primary);
            margin: 0;
            padding: 0;
            line-height: 1.6;
            padding-top: 80px; /* 为固定导航栏留出空间 */
        }
        
        /* 固定导航栏样式 */
        .navbar {
            display: flex;
            justify-content: space-between; /* 保持logo在左，其他内容在右 */
            align-items: center;
            padding: 15px 40px;
            background-color: rgba(10, 10, 10, 0.95);
            border-bottom: 1px solid #333;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            backdrop-filter: blur(5px);
        }
        
        /* 新增右侧容器 */
        .navbar-right {
            display: flex;
            align-items: center;
            gap: 30px; /* 控制导航链接和按钮之间的间距 */
        }
        
        /* 调整导航链接样式 */
        .nav-links {
            display: flex;
            gap: 30px;
            margin-right: 30px; /* 与按钮保持一定距离 */
        }
        
        .logo {
            display: flex;
            align-items: center;
        }
        
        .logo svg {
            width: 40px;
            height: 40px;
            margin-right: 10px;
        }
        
        .logo-text {
            font-size: 1.5rem;
            font-weight: bold;
            background: linear-gradient(to right, var(--accent-green), var(--accent-blue));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }
        
        .nav-links {
            display: flex;
            gap: 30px;
        }
        
        .nav-links a {
            color: var(--text-primary);
            text-decoration: none;
            font-weight: 500;
            transition: color 0.3s;
        }
        
        .nav-links a:hover {
            color: var(--accent-green);
        }
        
        .auth-buttons {
            display: flex;
            gap: 15px;
        }
        
        .auth-btn {
            padding: 8px 20px;
            border-radius: 5px;
            font-weight: 500;
            transition: all 0.3s;
        }
        
        .login-btn {
            background: transparent;
            color: var(--text-primary);
            border: 1px solid var(--text-primary);
        }
        
        .signup-btn {
            background: linear-gradient(to right, var(--accent-green), var(--accent-blue));
            color: var(--primary-dark);
            border: none;
        }
        .container {
            max-width: 1600px;
            margin: 0 auto;
            padding: 20px;
        }
        /* 恢复hero-section的动态背景效果 */
        .hero-section {
            text-align: center;
            padding: 100px 0;
            background: linear-gradient(135deg, var(--primary-dark), #1a1a1a);
            border-radius: 15px;
            margin: 40px 0;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
            border: 1px solid #333;
            position: relative;
            overflow: hidden;
        }
        
        .hero-section::before {
            content: "";
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle, rgba(0,255,136,0.1) 0%, rgba(0,0,0,0) 70%);
            animation: rotate 20s linear infinite;
            z-index: 0;
        }
        
        @keyframes rotate {
            from { transform: rotate(0deg); }
            to { transform: rotate(360deg); }
        }
        
        .header-content {
            position: relative;
            z-index: 1;
        }
        
        h1 {
            font-size: 3.5rem;
            margin: 0;
            background: linear-gradient(to right, var(--accent-green), var(--accent-blue));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            text-shadow: 0 0 15px rgba(0, 255, 136, 0.3);
            letter-spacing: -1px;
        }
        
        .tagline {
            font-size: 1.3rem;
            color: var(--text-secondary);
            margin-top: 15px;
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
        }
        
        section {
            background-color: var(--secondary-dark);
            border-radius: 15px;
            padding: 40px;
            margin-bottom: 40px;
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.25);
            border: 1px solid #333;
            transition: transform 0.3s, box-shadow 0.3s;
        }
        
        section:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 35px rgba(0, 255, 136, 0.15);
        }
        
        h2 {
            color: var(--accent-green);
            font-size: 2.2rem;
            margin-top: 0;
            margin-bottom: 30px;
            padding-bottom: 15px;
            border-bottom: 2px solid var(--accent-green);
            text-shadow: 0 0 10px rgba(0, 255, 136, 0.2);
            position: relative;
        }
        
        h2::after {
            content: "";
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 100px;
            height: 2px;
            background: var(--accent-blue);
        }
        
        h3 {
            color: var(--accent-blue);
            font-size: 1.6rem;
            margin-top: 0;
            margin-bottom: 15px;
        }
        
        p {
            color: var(--text-secondary);
            margin-bottom: 20px;
            font-size: 1.05rem;
        }
        
        /* Two-column layout for content sections */
        .columns-2 {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
            gap: 30px;
            margin-top: 30px;
        }
        
        .column {
            display: flex;
            flex-direction: column;
            gap: 25px;
        }
        
        .feature-card {
            background-color: #1a1a1a;
            border-radius: 12px;
            padding: 25px;
            border: 1px solid #333;
            transition: all 0.3s;
        }
        
        .feature-card:hover {
            border-color: var(--accent-green);
            box-shadow: 0 0 20px rgba(0, 255, 136, 0.1);
            transform: translateY(-3px);
        }
        
        /* Step-by-step section with alternating layout */
        .step-container {
            display: flex;
            flex-direction: column;
            gap: 60px;
            margin-top: 40px;
        }
        
        .step {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }
        
        .step:nth-child(even) .step-content {
            order: 2;
        }
        
        .step:nth-child(even) .step-image {
            order: 1;
        }
        
        .step-number {
            display: inline-block;
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--accent-green), var(--accent-blue));
            color: var(--primary-dark);
            border-radius: 50%;
            text-align: center;
            line-height: 40px;
            font-weight: bold;
            margin-bottom: 15px;
            font-size: 1.2rem;
        }
        
        .step-content {
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        
        .step-image {
            text-align: center;
        }
        
        .step-image svg {
            max-width: 100%;
            height: auto;
            filter: drop-shadow(0 5px 15px rgba(0, 0, 0, 0.3));
        }
        
        /* Three-column layout for features */
        .columns-3 {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 25px;
            margin-top: 30px;
        }
        
        /* FAQ section */
        .faq-container {
            display: grid;
            grid-template-columns: 1fr;
            gap: 20px;
            margin-top: 30px;
        }
        
        .faq-item {
            background-color: #1a1a1a;
            border-radius: 12px;
            padding: 25px;
            border: 1px solid #333;
            transition: all 0.3s;
        }
        
        .faq-item:hover {
            border-color: var(--accent-blue);
        }
        
        .faq-question {
            color: var(--accent-green);
            font-weight: bold;
            font-size: 1.2rem;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 0;
        }
        
        .faq-answer {
            margin-top: 15px;
            color: var(--text-secondary);
            display: none;
        }
        
        .faq-item.active .faq-answer {
            display: block;
        }
        
        .faq-question span {
            font-size: 1.5rem;
            transition: transform 0.3s;
        }
        
        .faq-item.active .faq-question span {
            transform: rotate(45deg);
        }
        
        /* CTA section */
        .cta {
            text-align: center;
            padding: 60px 40px;
            background: linear-gradient(135deg, #1a1a1a, #0a0a0a);
            border-radius: 15px;
            margin-top: 50px;
            position: relative;
            overflow: hidden;
            border: 1px solid var(--accent-green);
        }
        
        .cta::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: radial-gradient(circle at center, rgba(0,255,136,0.1) 0%, rgba(0,0,0,0) 70%);
            z-index: 0;
        }
        
        .cta-content {
            position: relative;
            z-index: 1;
        }
        
        .btn {
            display: inline-block;
            padding: 18px 36px;
            background: linear-gradient(to right, var(--accent-green), var(--accent-blue));
            color: var(--primary-dark);
            text-decoration: none;
            border-radius: 50px;
            font-weight: bold;
            margin-top: 25px;
            border: none;
            cursor: pointer;
            transition: all 0.3s;
            box-shadow: 0 5px 20px rgba(0, 255, 136, 0.3);
            font-size: 1.1rem;
            position: relative;
            overflow: hidden;
        }
        
        .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: 0.5s;
        }
        
        .btn:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 30px rgba(0, 255, 136, 0.5);
        }
        
        .btn:hover::before {
            left: 100%;
        }
        
        footer {
            text-align: center;
            padding: 40px 0;
            color: var(--text-secondary);
            font-size: 0.95rem;
            margin-top: 50px;
        }
        
        /* Animations */
        @keyframes float {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-10px); }
        }
        
        .floating {
            animation: float 4s ease-in-out infinite;
        }
        
        @keyframes pulse {
            0% { box-shadow: 0 0 0 0 rgba(0, 255, 136, 0.7); }
            70% { box-shadow: 0 0 0 15px rgba(0, 255, 136, 0); }
            100% { box-shadow: 0 0 0 0 rgba(0, 255, 136, 0); }
        }
        
        .pulse {
            animation: pulse 3s infinite;
        }
        
        /* Responsive adjustments */
        @media (max-width: 900px) {
            .step {
                grid-template-columns: 1fr;
                gap: 25px;
            }
            
            .step:nth-child(even) .step-content,
            .step:nth-child(even) .step-image {
                order: initial;
            }
            
            .columns-2, .columns-3 {
                grid-template-columns: 1fr;
            }
            
            h1 {
                font-size: 2.8rem;
            }
        }
		/* 英雄区域样式 - 保持原有动态背景 */
    .hero-section {
        padding: 2rem 1rem;
        text-align: center;
        max-width: 1600px;
        margin: 0 auto;
        background: linear-gradient(135deg, rgba(52, 152, 219, 0.1), rgba(155, 89, 182, 0.1));
        border-radius: 10px;
        box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
        position: relative;
        overflow: hidden;
    }
    
    .hero-section::before {
        content: '';
        position: absolute;
        top: -50%;
        left: -50%;
        right: -50%;
        bottom: -50%;
        background: linear-gradient(
            45deg, 
            rgba(52, 152, 219, 0.05) 0%, 
            rgba(155, 89, 182, 0.05) 50%, 
            rgba(52, 152, 219, 0.05) 100%
        );
        animation: gradientShift 15s ease infinite;
        z-index: -1;
    }
    
    @keyframes gradientShift {
        0% { transform: translateX(-25%); }
        50% { transform: translateX(25%); }
        100% { transform: translateX(-25%); }
    }
    
    .header-content h1 {
        font-size: 2.5rem;
        margin-bottom: 1rem;
        color: #2c3e50;
    }
    
    .tagline {
        font-size: 1.2rem;
        color: #7f8c8d;
        margin-bottom: 2rem;
        max-width: 900px;
        margin-left: auto;
        margin-right: auto;
    }
    
    /* 输入输出区域样式 - 修改部分 */
    .io-container {
        max-width: 1600px;
        margin: 0 auto;
        padding: 0 1rem;
    }
    
    .text-areas {
        display: flex;
        gap: 20px;
        width: 100%;
        margin-top: 20px;
    }
    
    .text-box {
        width: 100%;
        height: 400px;
        border-radius: 8px;
        padding: 15px;
        font-size: 16px;
        border: 2px solid #2ecc71; /* 绿色边框 */
        resize: vertical;
        background-color: rgba(0, 0, 0, 0.7); /* 黑色半透明背景 */
        color: #ecf0f1; /* 浅色文字 */
        transition: all 0.3s ease;
        box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    }
    
    .text-box:hover {
        border-color: #27ae60; /* 悬停时深绿色 */
        box-shadow: 0 0 0 3px rgba(46, 204, 113, 0.2);
    }
    
    .text-box::placeholder {
        color: rgba(236, 240, 241, 0.6); /* 浅色占位符 */
    }
    
    /* 控制区域样式 - 保持不变 */
    .controls {
        display: flex;
        align-items: center;
        justify-content: flex-start;
        gap: 20px;
        margin-top: 15px;
        flex-wrap: wrap;
    }
    
    .language-selector select {
        padding: 10px 15px;
        font-size: 16px;
        border-radius: 5px;
        border: 1px solid #dfe6e9;
        background-color: white;
        color: #2c3e50;
        transition: all 0.3s ease;
    }
    
    .language-selector select:hover {
        border-color: #2ecc71;
    }
    
    .btn-custom {
        padding: 10px 20px;
        font-size: 16px;
        background-color: #3498db;
        color: white;
        border: none;
        border-radius: 5px;
        cursor: pointer;
        transition: all 0.3s ease;
    }
    
    .btn-custom:hover {
        background-color: #2980b9;
        box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2);
    }
    
    /* 进度条样式 - 保持不变 */
    .progress-container {
        display: none;
        flex: 1;
        min-width: 200px;
    }
    
    .progress {
        width: 100%;
        height: 25px;
        background-color: #ecf0f1;
        border-radius: 5px;
        overflow: hidden;
        position: relative;
    }
    
    .progress-bar {
        width: 0%;
        height: 100%;
        background-color: #1abc9c;
        position: absolute;
        top: 0;
        left: 0;
        transition: width 0.3s;
    }
    
    .progress-text {
        margin-top: 5px;
        font-size: 16px;
        color: #7f8c8d;
        text-align: center;
    }
    
    /* 状态消息样式 - 保持不变 */
    .status-message {
        display: none;
        margin-top: 10px;
        font-size: 16px;
        text-align: center;
        color: #7f8c8d;
    }
    
    .status-message.success {
        color: #2ecc71;
    }
    
    /* 响应式设计 - 保持不变 */
    @media (max-width: 768px) {
        .text-areas {
            flex-direction: column;
        }
        
        .controls {
            flex-direction: column;
            align-items: stretch;
        }
        
        .progress-container {
            width: 100%;
        }
    }
	/* CSS部分 */
    .principles-section {
        padding: 80px 0;
        background: linear-gradient(to bottom, #0d1a23, #0a1219);
        color: #e0e0e0;
        font-family: 'Segoe UI', system-ui, sans-serif;
        scroll-margin-top: 80px;
    }
    
    #aiPrinciples {
        scroll-margin-top: 80px;
        padding-top: 20px;
    }
    
    .container {
        max-width: 1500px;
        margin: 0 auto;
        padding: 0 20px;
    }
    
    .section-title {
        text-align: center;
        font-size: 2.8rem;
        margin-bottom: 15px;
        background: linear-gradient(to right, #2ecc71, #1abc9c);
        -webkit-background-clip: text;
        background-clip: text;
        color: transparent;
        font-weight: 700;
    }
    
    .section-subtitle {
        text-align: center;
        font-size: 1.2rem;
        color: #95a5a6;
        max-width: 800px;
        margin: 0 auto 50px;
        line-height: 1.6;
    }
    
    .principle-cards {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
        gap: 30px;
    }
    
    .principle-card {
        background: rgba(30, 40, 50, 0.6);
        border-radius: 15px;
        padding: 30px;
        box-shadow: 0 8px 40px rgba(0, 0, 0, 0.3);
        transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.1);
        border: 1px solid rgba(46, 204, 113, 0.15);
        position: relative;
        overflow: hidden;
    }
    
    .principle-card::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: linear-gradient(135deg, rgba(46, 204, 113, 0.03), transparent);
        z-index: -1;
    }
    
    .principle-card:hover {
        transform: translateY(-10px) scale(1.02);
        box-shadow: 0 15px 50px rgba(0, 0, 0, 0.4);
        border-color: rgba(46, 204, 113, 0.4);
    }
    
    .card-icon {
        font-size: 2.5rem;
        margin-bottom: 20px;
        opacity: 0.8;
    }
    
    .principle-title {
        font-size: 1.6rem;
        color: #2ecc71;
        margin-bottom: 20px;
        font-weight: 600;
        position: relative;
        display: inline-block;
    }
    
    .principle-title::after {
        content: '';
        position: absolute;
        bottom: -8px;
        left: 0;
        width: 50px;
        height: 3px;
        background: linear-gradient(to right, #2ecc71, transparent);
        border-radius: 3px;
    }
    
    .principle-content {
        line-height: 1.8;
        font-size: 1.05rem;
    }
    
    .principle-content p {
        margin-bottom: 18px;
        color: #ecf0f1;
    }
    
    .principle-content ul {
        padding-left: 22px;
        margin: 20px 0;
    }
    
    .principle-content li {
        margin-bottom: 12px;
        position: relative;
        color: #bdc3c7;
        padding-left: 10px;
    }
    
    .principle-content li::before {
        content: '';
        position: absolute;
        left: -5px;
        top: 10px;
        width: 6px;
        height: 6px;
        background: #2ecc71;
        border-radius: 50%;
    }
    
    .principle-content strong {
        color: #2ecc71;
        font-weight: 500;
        background: rgba(46, 204, 113, 0.1);
        padding: 0 4px;
        border-radius: 3px;
    }
    
    /* 响应式设计 */
    @media (max-width: 992px) {
        .principle-cards {
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        }
    }
    
    @media (max-width: 768px) {
        .section-title {
            font-size: 2.2rem;
        }
        
        .principle-card {
            padding: 25px;
        }
    }
    
    @media (max-width: 576px) {
        .section-title {
            font-size: 1.8rem;
        }
        
        .principle-cards {
            grid-template-columns: 1fr;
        }
    }
    
    /* 平滑滚动 */
    html {
        scroll-behavior: smooth;
    }