:root {
            --primary: #1a4f72;
            --secondary: #2c728c;
            --accent: #15a223;
            --dark: #05101a;
            --light: #f8f9fa;
            --gradient: linear-gradient(135deg, var(--primary), var(--secondary));
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        
        body {
            background-color: #0a1924;
            color: var(--light);
            line-height: 1.6;
            overflow-x: hidden;
            position: relative;
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 20px;
        }
        
        header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }
        
        .logo {
            font-size: 24px;
            font-weight: 700;
            color: white;
            display: flex;
            align-items: center;
        }
        
        .logo i {
            margin-right: 10px;
            color: var(--accent);
        }
        
        .hero {
            display: flex;
            flex-direction: column;
            align-items: center;
            text-align: center;
            padding: 40px 0;
        }
        
        .hero-video {
            width: 100%;
            max-width: 600px;
            margin-bottom: 30px;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
        }
        
        .hero-video video {
            width: 100%;
            height: auto;
            display: block;
        }
        
        .title {
            font-size: 2.8rem;
            margin-bottom: 15px;
            background: linear-gradient(to right, #4facfe, #00dcf4);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            font-weight: 800;
        }
        
        .subtitle {
            font-size: 1.5rem;
            margin-bottom: 30px;
            color: #c2d6e6;
        }
        
        .subtitle a {
            color: var(--accent);
            text-decoration: none;
            transition: all 0.3s ease;
        }
        
        .subtitle a:hover {
            text-decoration: underline;
        }
        
        .card {
            background: var(--gradient);
            border-radius: 16px;
            padding: 30px;
            margin-bottom: 30px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
            width: 100%;
            max-width: 800px;
        }
        
        .accuracy {
            font-size: 1.4rem;
            margin-bottom: 20px;
            font-weight: 600;
        }
        
        .percent a {
            color: white;
            background-color: var(--accent);
            padding: 5px 15px;
            border-radius: 50px;
            text-decoration: none;
            transition: all 0.3s ease;
        }
        
        .percent a:hover {
            background-color: #0e8a1a;
            transform: translateY(-2px);
        }
        
        .desc {
            font-size: 1.1rem;
            line-height: 1.7;
        }
        
        .highlight {
            color: #ffcc00;
            font-weight: 700;
        }
        
        .input-group {
            width: 100%;
            max-width: 600px;
            margin: 30px 0;
            position: relative;
        }
        
        .input-group input {
            width: 100%;
            padding: 18px 25px;
            border: none;
            border-radius: 50px;
            background: rgba(255, 255, 255, 0.1);
            backdrop-filter: blur(10px);
            color: white;
            font-size: 1.1rem;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
            transition: all 0.3s ease;
        }
        
        .input-group input:focus {
            outline: none;
            background: rgba(255, 255, 255, 0.15);
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
        }
        
        .input-group input::placeholder {
            color: #a0bcd0;
        }
        
        .btn {
            background: var(--accent);
            color: white;
            border: none;
            padding: 18px 40px;
            border-radius: 50px;
            font-size: 1.2rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow: 0 5px 20px rgba(21, 162, 35, 0.4);
        }
        
        .btn:hover {
            background: #0e8a1a;
            transform: translateY(-3px);
            box-shadow: 0 8px 25px rgba(21, 162, 35, 0.5);
        }
        
        .features {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 25px;
            margin: 60px 0;
        }
        
        .feature-card {
            background: rgba(255, 255, 255, 0.05);
            border-radius: 12px;
            padding: 25px;
            text-align: center;
            transition: all 0.3s ease;
        }
        
        .feature-card:hover {
            transform: translateY(-5px);
            background: rgba(255, 255, 255, 0.08);
        }
        
        .feature-icon {
            font-size: 2.5rem;
            margin-bottom: 20px;
            color: #00dcf4;
        }
        
        .feature-title {
            font-size: 1.3rem;
            margin-bottom: 15px;
            color: white;
        }
        
        .feature-desc {
            color: #c2d6e6;
            font-size: 1rem;
        }
        
        .ai-modal {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100vw;
            height: 100vh;
            z-index: 9999;
            background: rgba(0, 0, 0, 0.85);
            backdrop-filter: blur(5px);
            justify-content: center;
            align-items: center;
        }
        
        .pro-box, .result-box {
            background: rgb(5 16 26);
            border-radius: 16px;
            padding: 10px 10px;
            width: 100%;
            max-width: 800px;
            box-shadow: 0 15px 40px rgba(0, 0, 0, 0.5);
            border: 1px solid rgba(255, 255, 255, 0.1);
        }
        
        .progress-title {
            display: flex;
            align-items: center;
            gap: 15px;
            margin-bottom: 25px;
        }
        
        .progress-title .word {
            font-size: 1.5rem;
            font-weight: bold;
            color: white;
        }
        
        .progress-item {
            margin-bottom: 25px;
        }
        
        .progress-item-title {
            font-size: 1.1rem;
            margin-bottom: 12px;
            color: #c2d6e6;
        }
        
        .progress-bar-container {
            background: #eee;
            border-radius: 10px;
            height: 18px;
            overflow: hidden;
        }
        
        .progress-bar {
            height: 100%;
            background: #00dcf4;
            border-radius: 10px;
            width: 0%;
            transition: width 1s ease-in-out;
        }
        
        /* 优化后的结果样式 */
        .result-title {
            margin-bottom: 25px;
            text-align: center;
        }
        
        .result-title .word {
            font-size: 1.3rem;
            font-weight: bold;
            color: white;
            line-height: 1.5;
        }
        
        .result-content {
            font-size: 0.95rem;
            margin-bottom: 25px;
            color: #ffffff;
            text-align: center;
            line-height: 1.6;
        }
        
        .result-content ul {
            padding-left: 25px;
            margin-top: 15px;
            margin-bottom: 15px;
            text-align: left;
        }
        
        .result-content li {
            margin-bottom: 8px;
            font-size: 0.9rem;
        }
        
        .result-content strong {
            color: #4facfe;
        }
        
        .whatsapp-btn {
            background: #15a223;
            color: #fff;
            padding: 15px;
            border-radius: 12px;
            text-align: center;
            cursor: pointer;
            display: flex;
            justify-content: center;
            align-items: center;
            width: 100%;
            margin: 0 auto;
            text-decoration: none;
            font-weight: 600;
            font-size: 0.95rem;
            transition: all 0.3s ease;
            box-shadow: 0 5px 20px rgba(21, 162, 35, 0.4);
            animation: breath 1.6s infinite;
        }
        
        .whatsapp-btn:hover {
            background: #0e8a1a;
            transform: translateY(-3px);
            box-shadow: 0 8px 25px rgba(21, 162, 35, 0.5);
        }
        
        footer {
            text-align: center;
            padding: 30px 0;
            margin-top: 40px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: #a0bcd0;
            font-size: 0.9rem;
        }
        
        /* 新增的灰色覆盖层样式 */
        .overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.7);
            z-index: 9998;
            pointer-events: auto;
        }
        
        @keyframes breath {
            0% { transform: scale(1); }
            50% { transform: scale(1.03); }
            100% { transform: scale(1); }
        }
        
        @media (max-width: 768px) {
            .title {
                font-size: 2.2rem;
            }
            
            .subtitle {
                font-size: 1.2rem;
            }
            
            .card {
                padding: 20px;
            }
            
            .accuracy {
                font-size: 1.2rem;
            }
            
            .features {
                grid-template-columns: 1fr;
            }
            
            .result-title .word {
                font-size: 1.1rem;
            }
            
            .result-content {
                font-size: 0.85rem;
            }
            
            .whatsapp-btn {
                font-size: 0.85rem;
                padding: 12px;
            }
        }