:root {
            --primary-color: #0056b3;
            --secondary-color: #f8f9fa;
            --text-color: #333;
            --accent-color: #dc3545;
            --border-color: #dee2e6;
            /* 社群專屬代表色 */
            --fb-color: #1877f2;
            --line-color: #06c755;
            --yt-color: #ff0000;
        }
        
        /* 讓錨點滾動時有平滑效果 */
        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
            line-height: 1.6;
            color: var(--text-color);
            margin: 0;
            padding: 0;
            padding-top: 60px; /* 預留空間給固定在頂部的目錄選單 */
            background-color: #ffdfb6;
        }
        
        /* 固定在頂部的導覽目錄選單 */
        .navbar {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background-color: #ffffff;
            box-shadow: 0 2px 5px rgba(0,0,0,0.1);
            z-index: 1000;
        }
        .nav-container {
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 10px 20px;
        }
        .nav-logo {
            font-weight: bold;
            font-size: 1.2rem;
            color: var(--primary-color);
            text-decoration: none;
        }
        .nav-menu {
            display: flex;
            list-style: none;
            margin: 0;
            padding: 0;
            align-items: center;
        }
        .nav-item {
            margin-left: 15px;
        }
        .nav-link {
            text-decoration: none;
            color: #555;
            font-weight: 500;
            font-size: 0.95rem;
            transition: color 0.3s;
        }
        .nav-link:hover {
            color: var(--primary-color);
        }
        
        /* 頂部社群圖標獨立樣式 */
        .nav-social {
            font-size: 1.1rem;
            transition: transform 0.2s, color 0.2s;
        }
        .nav-social.fb:hover { color: var(--fb-color); transform: scale(1.1); }
        .nav-social.line:hover { color: var(--line-color); transform: scale(1.1); }
        .nav-social.yt:hover { color: var(--yt-color); transform: scale(1.1); }

        /* 目錄上的亮色突出的 CTA 按鈕 */
        .nav-cta {
            background-color: var(--accent-color);
            color: white !important;
            padding: 6px 15px;
            border-radius: 20px;
        }
        .nav-cta:hover {
            background-color: #bd2130;
        }

        /* ==========================================================================
           【全新改版】純圖片式 RWD Banner (支援電腦/平板/手機三尺寸)
           ========================================================================== */
        .hero-banner {
            width: 100%;
            display: block;
            margin: 0;
            padding: 0;
            position: relative;
        }
        /* 讓 Banner 內部的圖片寬度滿版，高度自動依比例縮放，確保文字圖片不拉伸變形 */
        .hero-banner img {
            width: 100%;
            height: auto;
            display: block;
        }

        /* 專為 AI SEO 設計的視覺隱藏樣式（隱藏文字，但保留給搜尋引擎爬蟲爬取核心關鍵字） */
        .visually-hidden {
            position: absolute !important;
            width: 1px !important;
            height: 1px !important;
            padding: 0 !important;
            margin: -1px !important;
            overflow: hidden !important;
            clip: rect(0, 0, 0, 0) !important;
            white-space: nowrap !important;
            border: 0 !important;
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 20px;
        }
        
        /* AI SEO 摘要區樣式 */
        .ai-summary-box {
            background-color: #ffffff;
            border-left: 5px solid var(--primary-color);
            padding: 20px;
            margin: 30px 0;
            border-radius: 4px;
        }
        .ai-summary-box h2 { margin-top: 0; color: var(--primary-color); font-size: 1.5rem; }
        .ai-summary-box ul { margin-bottom: 0; padding-left: 20px; }
        
        /* 錨點跳轉目標的偏移量優化 */
        section, article {
            scroll-margin-top: 80px; 
        }

        .section-title {
            text-align: center;
            margin: 40px 0 20px 0;
            color: var(--primary-color);
            position: relative;
        }
        .grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 20px;
            margin-bottom: 30px;
        }
        .card {
            background: var(--secondary-color);
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 20px;
        }
        .card h3 { margin-top: 0; color: var(--primary-color); }
        
        /* 響應式表格樣式 */
        .table-responsive {
            overflow-x: auto;
            margin-bottom: 30px;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            margin: 10px 0;
        }
        th, td {
            border: 1px solid var(--border-color);
            padding: 12px;
            text-align: left;
        }
        th { background-color: #f1f3f5; font-weight: bold; }
        tr:nth-child(even) { background-color: #fafbfc; }
        td { background-color: #ffffff; font-weight: bold; }
        td ul { margin:0px 5px 0px -1.5em; }

        /* 學員見證專屬樣式 */
        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 25px;
            margin-bottom: 40px;
        }
        .testimonial-card {
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 25px;
            box-shadow: 0 4px 10px rgba(0,0,0,0.03);
            position: relative;
        }
        .testimonial-stars {
            color: #ffc107;
            font-size: 1.2rem;
            margin-bottom: 10px;
        }
        .testimonial-meta {
            font-size: 0.9rem;
            color: #666;
            margin-bottom: 15px;
            border-bottom: 1px dashed var(--border-color);
            padding-bottom: 10px;
        }
        .testimonial-meta strong {
            color: var(--primary-color);
            font-size: 1rem;
        }
        .testimonial-content {
            font-size: 0.95rem;
            color: #444;
            text-align: justify;
        }

        /* FAQ 摺疊樣式 */
        details {
            background: var(--secondary-color);
            border: 1px solid var(--border-color);
            border-radius: 4px;
            padding: 15px;
            margin-bottom: 10px;
       
        }
        summary {
            font-weight: bold;
            cursor: pointer;
            outline: none;
            font-size: 1.1rem;
        }

        }
        details[open] summary { margin-bottom: 10px; color: var(--primary-color);}
        
        /* CTA 按鈕 */
        .cta-container {
            text-align: center;
            margin: 10px 0;
        }
        .btn {
            display: inline-block;
            background-color: var(--accent-color);
            color: white;
            padding: 5px 10px;
            margin-bottom: 10px;
            text-decoration: none;
            font-size: 1rem;
            font-weight: bold;
            border-radius: 50px;
            box-shadow: 0 4px 6px rgba(0,0,0,0.1);
            transition: background-color 0.3s;
        }
        .btn:hover { background-color: #bd2130; }
        
        /* 頁尾社群專區樣式 */
        .footer-social-box {
            margin: 20px 0;
        }
        .footer-social-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 45px;
            height: 45px;
            border-radius: 50%;
            background-color: #495057;
            color: white;
            text-decoration: none;
            margin: 0 8px;
            font-size: 1.2rem;
            transition: background-color 0.3s, transform 0.2s;
        }
        .footer-social-btn.fb:hover { background-color: var(--fb-color); transform: translateY(-3px); }
        .footer-social-btn.line:hover { background-color: var(--line-color); transform: translateY(-3px); }
        .footer-social-btn.yt:hover { background-color: var(--yt-color); transform: translateY(-3px); }

        footer {
            background-color: #343a40;
            color: white;
            text-align: center;
            padding: 40px 20px;
            margin-top: 50px;
            font-size: 0.9rem;
        }

        /* ==========================================================================
           響應式網頁設計 (RWD) 斷點設定
           ========================================================================== */
        
        /* 平板與手機通用（螢幕寬度 992px 以下） */
        @media (max-width: 992px) {
            body {
                padding-top: 100px; /* 導覽列變兩行，增加上方留白 */
            }
            .nav-container {
                flex-direction: column;
                padding: 8px 10px;
            }
            .nav-logo {
                margin-bottom: 8px;
                font-size: 1.1rem;
            }
            .nav-menu {
                width: 100%;
                justify-content: center;
                flex-wrap: wrap;
            }
            .nav-item {
                margin: 4px 6px;
            }
            .nav-link {
                font-size: 0.85rem;
            }
            .nav-cta {
                padding: 4px 10px;
            }
        }

        /* 純手機尺寸（螢幕寬度 576px 以下） */
        @media (max-width: 576px) {
            body {
                padding-top: 130px; /* 手機版選單擠壓換行，再次微調上方留白 */
            }
            .btn {
                font-size: 1rem;
                padding: 12px 25px;
                width: 90%;
                box-sizing: border-box;
            }
        }
        		/* Form */

/* 1. 表單外層容器 */
#consult-form, 
section:has(h3:contains("想了解首宇課程")) {
    max-width: 650px;
    margin: 40px auto;
    padding: 35px 25px;
    background: #ffffff;
    border-radius: 12px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
    border: 1px solid #eef2f5;
    box-sizing: border-box;
}

/* 標題與說明文字 */
#consult-form h3, 
section h3 {
    font-size: 1.5rem;
    color: #2c3e50;
    margin-bottom: 8px;
    text-align: center;
    font-weight: 600;
}

#consult-form p, 
section p {
    font-size: 0.95rem;
    color: #7f8c8d;
    margin-bottom: 25px;
}

/* 2. 表單標籤與輸入欄位組合 */
.form-group {
    margin-bottom:20px;
    display: flex;
    flex-direction: column;
}

.form-label {
    font-size: 0.95rem;
    color: #34495e;
    margin-bottom: 8px;
    font-weight: 500;
    text-align: left;
}

/* 3. 欄位輸入框通用樣式 (文字框、Email、電話、下拉選單、文字域) */
.form-control,
#consult-form input[type="text"],
#consult-form input[type="tel"],
#consult-form input[type="email"],
#consult-form select,
#consult-form textarea {
    width: 100%;
    padding: 12px 16px;
    font-size: 1rem;
    color: #2c3e50;
    background-color: #f8fafc;
    border: 1px solid #cbd5e1;
    border-radius: 8px;
    transition: all 0.3s ease;
    box-sizing: border-box;
    outline: none;
}

/* 欄位 Focus 聚焦狀態效果 */
.form-control:focus,
#consult-form input:focus,
#consult-form select:focus,
#consult-form textarea:focus {
    border-color: #3498db;
    background-color: #ffffff;
    box-shadow: 0 0 0 4px rgba(52, 152, 219, 0.15);
}

/* 下拉選單微調 */
#consult-form select {
    appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%237f8c8d' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
    background-size: 16px;
    padding-right: 40px;
}

/* 4. 核取方塊與單選鈕 (Checkbox / Radio) */
.form-check {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
    cursor: pointer;
}

#consult-form input[type="checkbox"],
#consult-form input[type="radio"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: #3498db; /* 現代瀏覽器主體顏色定義 */
}

/* 5. 提交按鈕優化 */
.btn-submit,
#consult-form button,
#consult-form input[type="submit"] {
    width: 100%;
    padding: 14px 20px;
    font-size: 1.1rem;
    font-weight: 600;
    color: #ffffff;
    background: linear-gradient(135deg, #3498db, #2980b9);
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.25s ease;
    box-shadow: 0 4px 12px rgba(52, 152, 219, 0.3);
    margin-top: 0px;
}

/* 按鈕 Hover 與點擊效果 */
.btn-submit:hover,
#consult-form button:hover,
#consult-form input[type="submit"]:hover {
    background: linear-gradient(135deg, #2980b9, #2471a3);
    box-shadow: 0 6px 16px rgba(52, 152, 219, 0.4);
    transform: translateY(-1px);
}

.btn-submit:active,
#consult-form button:active,
#consult-form input[type="submit"]:active {
    transform: translateY(1px);
    box-shadow: 0 2px 6px rgba(52, 152, 219, 0.3);
}

/* 6. RWD 響應式微調 (手機板尺寸) */
@media (max-width: 576px) {
    #consult-form, 
    section:has(h3:contains("想了解首宇課程")) {
        margin: 20px 15px;
        padding: 25px 15px;
    }
    
    #consult-form h3, section h3 {
        font-size: 1.3rem;
    }
}