:root {
            --primary-green: #4caf50;    
            --dark-green: #2e7d32;       
            --light-bg: #e8f5e9;         
            --card-white: rgba(255, 255, 255, 0.96);
            --border-light: #c8e6c9;
            --text-main: #1b5e20;
            --calc-blue: #1976d2;
            --error-red: #d32f2f;
        }
        @media print {
            body { background: white !important; padding: 0 !important; }
            .container { box-shadow: none !important; border: none !important; width: 100% !important; max-width: none !important; padding: 0 !important; }
            #step_bar, #btn_area, .btn, h2, .result-info, table:not(#print_area table) { display: none !important; }
            #p4 { display: block !important; padding: 0 !important; }
            #print_area { box-shadow: none !important; margin: 0 !important; width: 100% !important; }
}       
        body {
            font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
            background-color: var(--light-bg);
            background-image: linear-gradient(rgba(76,175,80,0.1) 1px, transparent 1px), linear-gradient(90deg, rgba(76,175,80,0.1) 1px, transparent 1px);
            background-size: 30px 30px; color: var(--text-main);
            display: flex; justify-content: center; padding: 40px 20px; margin: 0;
        }

        .container {
            width: 100%; max-width: 900px; background: var(--card-white);
            backdrop-filter: blur(10px); border: 2px solid var(--border-light);
            border-radius: 24px; padding: 40px; box-shadow: 0 15px 35px rgba(0,0,0,0.08);
            position: relative;
        }

        h2 { text-align: center; font-size: 26px; color: var(--dark-green); margin-bottom: 30px; }

        /* 步骤条样式 */
        .steps { display: flex; justify-content: space-between; margin-bottom: 40px; position: relative; }
        .steps::after { left: 8%; right: 8%; content: ""; position: absolute; top: 15px; left: 5%; right: 5%; height: 2px; background: var(--border-light); z-index: 1; }
        .step { z-index: 2; background: white; padding: 0 10px; font-size: 13px; color: #a5d6a7; text-align: center; transition: 0.3s; }
        .step.active { color: var(--dark-green); font-weight: bold; }
        .step-num { width: 30px; height: 30px; border: 2px solid currentColor; border-radius: 50%; display: block; margin: 0 auto 8px; line-height: 30px; text-align: center; }
        .step.active .step-num { background: var(--primary-green); color: white; border-color: var(--primary-green); }

        .form-content { min-height: 300px; }
        .form-item { margin-bottom: 20px; position: relative; }
        label { display: block; margin-bottom: 8px; font-size: 14px; font-weight: 600; color: var(--dark-green); }

        input, select {
            width: 100%; padding: 12px; background: #f9fdf9; border: 1px solid var(--border-light);
            border-radius: 10px; font-size: 14px; outline: none; box-sizing: border-box; transition: 0.2s;
        }
        input:focus { border-color: var(--primary-green); box-shadow: 0 0 0 3px rgba(76,175,80,0.1); }

        .error-msg { color: var(--error-red); font-size: 12px; margin-top: 5px; height: 18px; font-weight: bold; }

        /* 布局控制 */
        .deep-container { display: grid; grid-template-columns: 1.2fr 1fr; gap: 30px; align-items: center; }
        .deep-inputs { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; }
        .chart-wrapper { position: relative; height: 280px; }

        .result-info { background: #f1f8f1; padding: 20px; border-radius: 15px; margin-bottom: 20px; border-left: 6px solid var(--primary-green); }
        .meta-tags { display: flex; gap: 10px; margin-bottom: 10px; flex-wrap: wrap; }
        .info-tag { font-size: 12px; color: #555; background: rgba(0,0,0,0.05); padding: 4px 10px; border-radius: 6px; border: 1px solid rgba(0,0,0,0.05); }

        .btn-group { display: flex; justify-content: flex-end; gap: 12px; margin-top: 30px; }
        .btn { padding: 10px 24px; border-radius: 8px; cursor: pointer; font-size: 14px; font-weight: bold; border: none; transition: 0.3s; }
        .btn-prev { background: #e8f5e9; color: var(--dark-green); border: 1px solid var(--primary-green); }
        .btn-next { background: var(--dark-green); color: white; }
        .btn-contact { background: #ff9800; color: #fff; }
        .btn-calc { background: var(--calc-blue); color: white; }
        .btn-submit { background: #2e7d32; color: #fff; }
        
        .hidden { display: none !important; }

        .thanks-box { text-align: center; padding: 40px 0; }
        .thanks-icon { font-size: 60px; color: var(--primary-green); margin-bottom: 20px; }

        table { width:100%; border-collapse:collapse; border-radius: 12px; overflow: hidden; box-shadow: 0 2px 10px rgba(0,0,0,0.05); }
        th { background:var(--primary-green); color:white; padding:15px; font-size: 14px; }
        td { padding:15px; border:1px solid #eee; background: white; }