* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "SF Pro TC", "SF Pro Display", "Helvetica Neue", "Microsoft JhengHei", sans-serif;
            line-height: 1.6;
            color: #1d1d1f;
            background-color: #ffffff;
            -webkit-font-smoothing: antialiased;
        }

        .container {
            max-width: 980px;
            margin: 0 auto;
            padding: 40px 22px;
        }

        /* Header */
        .header {
            text-align: center;
            margin-bottom: 48px;
        }

        .header h1 {
            font-size: 42px;
            font-weight: 700;
            background: linear-gradient(135deg, #007aff 0%, #00c6ff 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 16px;
        }

        .header p {
            font-size: 21px;
            color: #6e6e73;
            margin-bottom: 24px;
        }

        .brand {
            font-size: 17px;
            color: #007aff;
            font-weight: 600;
            letter-spacing: 1px;
        }

        /* Introduction */
        .introduction {
            background: #f5f5f7;
            padding: 32px;
            border-radius: 12px;
            margin-bottom: 32px;
            border: 1px solid #e5e5e7;
        }

        .introduction h2 {
            font-size: 24px;
            font-weight: 600;
            color: #1d1d1f;
            margin-bottom: 16px;
        }

        .introduction p {
            font-size: 17px;
            line-height: 1.7;
            color: #1d1d1f;
            margin-bottom: 16px;
        }

        /* Disclaimer */
        .disclaimer {
            background: #fffcf0;
            border-left: 4px solid #ffcc00;
            padding: 24px;
            border-radius: 12px;
            margin-bottom: 48px;
        }

        /* Progress Bar */
        .progress-container {
            margin-bottom: 32px;
        }

        .progress-text {
            text-align: center;
            font-size: 19px;
            font-weight: 600;
            color: #1d1d1f;
            margin-bottom: 12px;
        }

        .progress-bar {
            width: 100%;
            height: 8px;
            background: #f5f5f7;
            border-radius: 4px;
            overflow: hidden;
        }

        .progress-fill {
            height: 100%;
            background: #007aff;
            width: 14.28%; 
            transition: width 0.4s ease;
        }

        /* Question Card */
        .question-card {
            background: #ffffff;
            border-radius: 18px;
            padding: 48px 32px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
            border: 1px solid #f5f5f7;
            display: none;
            opacity: 0;
        }

        .question-card.active {
            display: block;
            animation: fadeIn 0.4s ease forwards;
        }

        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(10px); }
            to { opacity: 1; transform: translateY(0); }
        }

        .question-title {
            font-size: 28px;
            font-weight: 600;
            color: #1d1d1f;
            margin-bottom: 12px;
        }

        .question-subtitle {
            font-size: 18px;
            color: #6e6e73;
            margin-bottom: 32px;
        }

        /* Radio Options */
        .option {
            background: #f5f5f7;
            padding: 20px 24px;
            border-radius: 12px;
            margin-bottom: 16px;
            cursor: pointer;
            transition: all 0.2s ease;
            border: 2px solid transparent;
        }

        .option:hover {
            background: #e8f4ff;
            border-color: #007aff;
        }

        .option.selecting {
            background: #e8f4ff;
            border-color: #007aff;
            transform: scale(0.99);
        }

        .option-label {
            display: flex;
            align-items: flex-start;
            gap: 16px;
        }

        .option-radio {
            flex-shrink: 0;
            width: 22px;
            height: 22px;
            border-radius: 50%;
            border: 2px solid #d1d1d6;
            margin-top: 3px;
        }

        .option.selecting .option-radio {
            border-color: #007aff;
            background: radial-gradient(circle, #007aff 40%, transparent 40%);
        }

        .option-text .option-letter {
            font-weight: 700;
            color: #1d1d1f;
        }

        /* Navigation */
        .navigation {
            display: flex;
            justify-content: center;
            gap: 16px;
            margin-top: 32px;
        }

        .btn-prev {
            background: #ffffff;
            color: #007aff;
            padding: 12px 28px;
            border-radius: 980px;
            font-size: 16px;
            font-weight: 600;
            border: 2px solid #007aff;
            cursor: pointer;
            display: none;
        }

        .btn-prev.show { display: inline-block; }

        /* Result Section */
        .result-section {
            display: none;
            opacity: 0;
        }

        .result-section.show {
            display: block;
            animation: fadeIn 0.6s ease forwards;
        }

        .result-card {
            background: #ffffff;
            border-radius: 20px;
            padding: 48px 32px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
            text-align: center;
        }

        /* Circular Progress */
        .circular-progress {
            width: 180px;
            height: 180px;
            margin: 0 auto 32px;
            position: relative;
        }

        .circular-progress svg { transform: rotate(-90deg); }
        .circular-progress-bg { fill: none; stroke: #f5f5f7; stroke-width: 10; }
        .circular-progress-fill {
            fill: none; stroke: #007aff; stroke-width: 10;
            stroke-linecap: round; stroke-dasharray: 565.48;
            stroke-dashoffset: 565.48; transition: stroke-dashoffset 1s ease;
        }

        .circular-progress-text {
            position: absolute; top: 50%; left: 50%;
            transform: translate(-50%, -50%);
            font-size: 44px; font-weight: 700; color: #1d1d1f;
        }

        /* FAQ Section Styling */
        .faq-section {
            margin-top: 60px;
            border-top: 1px solid #e5e5e7;
            padding-top: 40px;
        }

        .faq-section h3 {
            font-size: 28px;
            text-align: center;
            margin-bottom: 32px;
            color: #1d1d1f;
        }

        .faq-item {
            margin-bottom: 16px;
            background: #f5f5f7;
            border-radius: 12px;
            overflow: hidden;
        }

        .faq-question {
            padding: 20px 24px;
            font-weight: 600;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            transition: background 0.3s;
        }

        .faq-question:hover { background: #e8e8ed; }

        .faq-answer {
            padding: 0 24px 20px;
            color: #424245;
            display: none;
            font-size: 16px;
            line-height: 1.6;
        }

        .faq-item.active .faq-answer { display: block; }
        .faq-item.active .faq-question::after { content: "−"; }
        .faq-question::after { content: "+"; font-size: 20px; color: #007aff; }

        /* Action Buttons */
        .action-buttons {
            display: flex; gap: 16px; justify-content: center;
            flex-wrap: wrap; margin-top: 32px;
        }

        .btn-action {
            padding: 16px 32px; border-radius: 12px;
            font-size: 17px; font-weight: 600; text-decoration: none;
            transition: all 0.3s ease; display: inline-flex;
            align-items: center; gap: 10px;
        }

        .btn-primary { background: #007aff; color: #ffffff; }
        .btn-primary:hover { background: #0051d5; transform: translateY(-2px); }
        .btn-whatsapp { background: #25d366; color: #ffffff; }
        .btn-whatsapp:hover { background: #128c7e; transform: translateY(-2px); }

        /* Contact & Local SEO */
        .contact-section {
            background: #f5f5f7; border-radius: 18px;
            padding: 40px; margin-top: 48px; text-align: center;
        }

        .clinic-info {
            font-size: 16px; color: #6e6e73; margin-top: 12px;
            display: flex; flex-direction: column; gap: 6px;
        }

        @media (max-width: 768px) {
            .header h1 { font-size: 32px; }
            .question-card { padding: 32px 20px; }
            .btn-action { width: 100%; justify-content: center; }
        }