/* --- HKSEV Blue Theme --- */
        :root {
            --primary: #0060a9;
            --primary-dark: #00457a;
            --secondary: #e6f4ff;
            --highlight: #b3e5fc;
            --alert: #d32f2f;
            --whatsapp: #25D366;
            --text-main: #2c3e50;
            --bg-body: #f4f7f9;
            --bg-card: #ffffff;
            --radius: 12px;
            --shadow: 0 10px 30px rgba(0, 96, 169, 0.1);
        }

        body { font-family: 'Noto Sans TC', sans-serif; line-height: 1.8; color: var(--text-main); background: var(--bg-body); margin: 0; padding: 0; }
        h1, h2, h3 { color: var(--primary); font-weight: 700; margin-top: 0; }
        a { color: var(--primary); text-decoration: none; transition: 0.3s; }
        
        .page-wrapper { max-width: 900px; margin: 40px auto; background: var(--bg-card); border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden; }
        .content-container { padding: 40px 60px; }
        
        @media (max-width: 768px) {
            .page-wrapper { margin: 0; border-radius: 0; }
            .content-container { padding: 30px 20px; }
            .hero-btns { flex-direction: column; }
            .hero-btns .btn { width: 100%; box-sizing: border-box; }
        }

        /* --- Hero Header --- */
        .hero-section {
            background: linear-gradient(135deg, var(--primary) 0%, #0083cb 100%);
            color: white;
            padding: 50px 30px;
            text-align: center;
            position: relative;
        }
        .hero-section::after {
            content: ""; position: absolute; bottom: -20px; left: 0; width: 100%; height: 40px;
            background: var(--bg-card); border-radius: 50% 50% 0 0 / 100% 100% 0 0;
        }
        
        h1.article-title { 
            color: white; 
            font-size: 2rem; 
            margin-bottom: 20px; 
            text-shadow: 0 2px 5px rgba(0,0,0,0.1); 
            line-height: 1.4;
        }
        
        .hero-btns {
            display: flex;
            justify-content: center;
            gap: 15px;
            margin-top: 25px;
            margin-bottom: 10px;
        }
        
        .hero-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 24px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1.1rem;
            text-decoration: none;
            transition: transform 0.2s;
            box-shadow: 0 4px 10px rgba(0,0,0,0.2);
        }
        .hero-btn:hover { transform: translateY(-2px); }
        .btn-call-hero { background: white; color: var(--primary); }
        .btn-wa-hero { background: var(--whatsapp); color: white; }

        /* --- USP Box (One-stop Center) --- */
        .usp-box {
            background: #1a237e; /* Deep tech blue */
            color: white;
            border-radius: var(--radius);
            padding: 35px;
            margin: 30px 0;
            text-align: center;
            box-shadow: 0 10px 25px rgba(0,0,0,0.25);
            position: relative;
            overflow: hidden;
        }
        .usp-box::before {
            content: ""; position: absolute; top: -50px; right: -50px; width: 150px; height: 150px;
            background: radial-gradient(circle, rgba(0,255,255,0.15) 0%, rgba(0,0,0,0) 70%); border-radius: 50%;
        }
        .usp-title { color: #81d4fa; font-size: 1.4rem; font-weight: 900; margin-bottom: 15px; display: block; }
        .usp-grid { display: flex; justify-content: space-around; align-items: center; flex-wrap: wrap; gap: 15px; margin-top: 25px; }
        .usp-item { flex: 1; min-width: 140px; }
        .usp-icon { font-size: 2.5rem; display: block; margin-bottom: 10px; }
        .usp-arrow { font-size: 1.5rem; color: #5c6bc0; }

        /* --- Indications Grid --- */
        .condition-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 20px;
            margin-top: 20px;
        }
        .c-card {
            background: #f8fbff;
            padding: 25px;
            border-radius: 12px;
            border: 1px solid #bbdefb;
            transition: 0.3s;
        }
        .c-card:hover { box-shadow: 0 5px 15px rgba(0, 96, 169, 0.1); border-color: var(--primary); transform: translateY(-3px); }
        .c-icon { font-size: 2.2rem; margin-bottom: 10px; display: block; }
        .c-title { font-weight: bold; color: var(--primary-dark); font-size: 1.2rem; margin-bottom: 8px; display: block; }

        /* --- Safety Checklist --- */
        .safety-box {
            background: #e8f5e9; border-left: 5px solid #43a047; padding: 25px; margin: 30px 0; border-radius: 0 8px 8px 0;
        }
        .safety-title { color: #2e7d32; font-weight: bold; font-size: 1.2rem; margin-bottom: 15px; display: block; }
        ul.check-list { list-style: none; padding: 0; margin: 0; }
        ul.check-list li { position: relative; padding-left: 30px; margin-bottom: 12px; color: #333; }
        ul.check-list li::before { content: "🛡️"; position: absolute; left: 0; }

        /* --- FAQ --- */
        details { background: #fff; border: 1px solid #eee; border-radius: 8px; margin-bottom: 10px; padding: 15px; }
        summary { font-weight: 700; cursor: pointer; color: var(--primary); }

        /* --- Footer --- */
        .article-footer {
            margin-top: 50px; padding-top: 20px; border-top: 1px solid #eee; text-align: center; color: #666; font-size: 0.9rem;
        }
        
        /* Mobile Sticky CTA */
        .sticky-cta-mobile {
            position: fixed; bottom: 0; left: 0; width: 100%;
            background: white; padding: 10px; box-shadow: 0 -2px 10px rgba(0,0,0,0.1);
            display: flex; gap: 10px; z-index: 999;
            box-sizing: border-box;
        }
        @media(min-width: 769px) { .sticky-cta-mobile { display: none; } }
        .sticky-btn { flex: 1; text-align: center; padding: 12px; border-radius: 8px; font-weight: bold; font-size: 0.9rem; }