* { margin: 0; padding: 0; box-sizing: border-box; font-family: "Microsoft YaHei", "PingFang SC", sans-serif; }
        body { background-color: #f8f9fa; color: #333; line-height: 1.6; }
        a { text-decoration: none; color: inherit; transition: 0.3s; }
        ul { list-style: none; }
        img { max-width: 100%; display: block; }
        
        :root {
            --primary-red: #B71C1C;
            --accent-gold: #D4AF37;
            --text-dark: #333;
            --bg-light: #f4f4f4;
            --sidebar-bg: #fff;
        }

        /* Header & Nav (复用) */
        .top-bar { background-color: #eee; padding: 8px 0; font-size: 14px; color: #666; }
        .container { width: 1200px; margin: 0 auto; max-width: 95%; }
        .top-bar .container { display: flex; justify-content: space-between; }
        .header-main { background: #fff; padding: 20px 0; }
        .header-main .container { display: flex; justify-content: space-between; align-items: center; }
        .logo { font-size: 28px; font-weight: bold; color: var(--primary-red); display: flex; align-items: center; }
        .logo span { font-size: 14px; color: #666; margin-left: 10px; font-weight: normal; border-left: 1px solid #ddd; padding-left: 10px; }
		.logo-main{
			width: 3.25rem;
			margin-right:8px ;
		}
        .hotline h3 { color: var(--primary-red); font-size: 24px; font-weight: bold; text-align: right; }
        
        nav { background-color: var(--primary-red); position: sticky; top: 0; z-index: 1000; box-shadow: 0 2px 5px rgba(0,0,0,0.1); }
        .nav-list { display: flex; justify-content: space-between; }
        .nav-list li { flex: 1; text-align: center; }
        .nav-list li a { display: block; color: #fff; padding: 15px 5px; font-size: 15px; font-weight: 500; }
        .nav-list li a:hover, .nav-list li.active a { background-color: #8e1212; color: var(--accent-gold); }
        .mobile-menu-btn { display: none; color: #fff; font-size: 24px; padding: 10px; cursor: pointer; }

        /* --- 本页特定样式 (Course Detail) --- */

        /* 1. 课程头部 Hero */
        .course-hero {
            background: linear-gradient(to right, #2c3e50, #4ca1af); /* 深色专业背景 */
            padding: 50px 0;
            color: #fff;
        }
        .hero-content h1 { font-size: 36px; margin-bottom: 15px; }
        .hero-content p { font-size: 16px; opacity: 0.9; max-width: 800px; margin-bottom: 25px; }
        .hero-tags span { background: rgba(255,255,255,0.2); padding: 5px 15px; border-radius: 4px; margin-right: 10px; font-size: 14px; }
        .hero-stats { display: flex; gap: 40px; margin-top: 30px; border-top: 1px solid rgba(255,255,255,0.2); padding-top: 20px; }
        .stat-box strong { font-size: 24px; color: var(--accent-gold); display: block; }
        .stat-box small { opacity: 0.8; font-size: 12px; }

        /* 2. 布局结构 (左内容 右侧栏) */
        .main-wrapper { display: flex; gap: 30px; margin-top: 40px; margin-bottom: 60px; }
        .left-content { flex: 3; }
        .right-sidebar { flex: 1; position: relative; }

        /* 左侧板块通用样式 */
        .content-block { background: #fff; padding: 30px; border-radius: 8px; margin-bottom: 20px; box-shadow: 0 2px 10px rgba(0,0,0,0.05); }
        .block-title { font-size: 22px; font-weight: bold; border-left: 5px solid var(--primary-red); padding-left: 15px; margin-bottom: 25px; color: #333; }
        
        /* 课程大纲 */
        .syllabus-list li { margin-bottom: 20px; border-bottom: 1px dashed #eee; padding-bottom: 20px; display: flex; }
        .day-badge { background: var(--primary-red); color: #fff; width: 60px; height: 60px; border-radius: 8px; display: flex; flex-direction: column; align-items: center; justify-content: center; margin-right: 20px; flex-shrink: 0; }
        .day-badge span { font-size: 12px; }
        .day-badge strong { font-size: 20px; line-height: 1; }
        .syllabus-info h4 { font-size: 18px; margin-bottom: 10px; color: #333; }
        .syllabus-info p { font-size: 14px; color: #666; }

        /* 证书展示 */
        .cert-box { display: flex; gap: 20px; background: #f9f9f9; padding: 20px; border-radius: 8px; align-items: center; }
        .cert-img { width: 200px; border: 5px solid #fff; box-shadow: 0 5px 15px rgba(0,0,0,0.1); }
        
        /* 常见问题 */
        .faq-item { margin-bottom: 15px; }
        .faq-q { font-weight: bold; color: #333; margin-bottom: 5px; cursor: pointer; display: flex; align-items: center; }
        .faq-q::before { content: 'Q'; background: var(--accent-gold); color: #fff; width: 24px; height: 24px; border-radius: 50%; display: inline-flex; align-items: center; justify-content: center; margin-right: 10px; font-size: 14px; }
        .faq-a { padding-left: 34px; color: #666; font-size: 14px; display: block; }

        /* 右侧悬浮报名框 */
        .sticky-box { position: sticky; top: 90px; background: #fff; padding: 25px; border-radius: 8px; box-shadow: 0 5px 20px rgba(0,0,0,0.1); border-top: 5px solid var(--primary-red); }
        .price-tag { font-size: 28px; color: var(--primary-red); font-weight: bold; margin-bottom: 10px; display: block; }
        .price-note { font-size: 12px; color: #999; text-decoration: line-through; margin-left: 10px; }
        
        .enroll-form input { width: 100%; padding: 12px; margin-bottom: 15px; border: 1px solid #ddd; border-radius: 4px; }
        .enroll-btn { width: 100%; background: var(--primary-red); color: #fff; border: none; padding: 12px; font-size: 16px; font-weight: bold; border-radius: 4px; cursor: pointer; transition: 0.3s; }
        .enroll-btn:hover { background: #901212; }
        
        .contact-teacher { margin-top: 20px; border-top: 1px solid #eee; padding-top: 20px; display: flex; align-items: center; }
        .teacher-avatar { width: 50px; height: 50px; border-radius: 50%; margin-right: 10px; }

        /* 底部固定栏 (Mobile Only - Hidden on Desktop) */
        .mobile-footer-bar { display: none; }

        /* 响应式 */
        @media (max-width: 768px) {
            .nav-list { display: none; }
            .mobile-menu-btn { display: block; }
            .header-main .container { flex-direction: column; gap: 10px; }
            .main-wrapper { flex-direction: column; }
            .right-sidebar { order: -1; } /* 手机端报名框放上面或者隐藏，这里我们做底部固定 */
            .sticky-box { display: none; } /* 手机端隐藏侧边栏，使用底部固定栏 */
            .mobile-footer-bar { display: flex; position: fixed; bottom: 0; left: 0; width: 100%; height: 60px; background: #fff; box-shadow: 0 -2px 10px rgba(0,0,0,0.1); z-index: 999; }
            .mf-btn { flex: 1; display: flex; align-items: center; justify-content: center; font-weight: bold; }
            .mf-consult { background: #fff; color: #333; flex: 1; }
            .mf-apply { background: var(--primary-red); color: #fff; flex: 1.5; }
        }
		/* --- 底部 Footer --- */
		footer { background: #222; color: #fff; padding: 50px 0 20px; }
		.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 30px; border-bottom: 1px solid #444; padding-bottom: 30px; margin-bottom: 20px; }
		.footer-about h4, .footer-link h4 { color: #fff; margin-bottom: 20px; font-size: 18px; }
		.footer-link ul li { margin-bottom: 10px; }
		.footer-link ul li a { color: #aaa; }
		.footer-link ul li a:hover { color: #fff; }
		.qr-box { text-align: center; }
		.qr-img { width: 120px; height: 120px; background: #fff; margin: 0 auto 10px; display: flex; align-items: center; justify-content: center; color: #333; }
		.copyright { text-align: center; color: #666; font-size: 13px; }