<style>
    /* ===== GLOBAL STYLES ===== */
    :root {
        --primary: #14a800;
        --secondary: #1f57c3;
        --accent: #7c3aed;
        --dark: #222222;
        --light: #f8fafc;
        --gray: #5e6d55;
        --border-radius: 8px;
        --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
        --transition: all 0.3s ease;
    }

    * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
    }

    body {
        font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
        line-height: 1.6;
        color: var(--dark);
        background-color: #ffffff;
        padding-bottom: 120px;
        overflow-x: hidden;
        width: 100%;
        position: relative;
    }

    .container {
        width: 100%;
        max-width: 1200px;
        margin: 0 auto;
        padding: 0 20px;
        overflow-x: hidden;
    }

    /* ===== MAIN CONTENT LAYOUT ===== */
    .main-content {
        display: grid;
        grid-template-columns: 1fr 400px;
        gap: 2rem;
        padding: 0.2rem 0;
        width: 100%;
        max-width: 100%;
        align-items: start;
    }
    .main-content-area {
        min-height: 100vh;
    }

    /* ===== SERVICE HEADER ===== */
    .service-header {
        margin-bottom: 0.2rem;
        width: 100%;
    }

    .service-title {
        font-size: 2rem;
        font-weight: 700;
        margin-bottom: 0rem;
        color: var(--dark);
        word-wrap: break-word;
    }

    .seller-info {
        display: flex;
        align-items: center;
        gap: 1rem;
        flex-wrap: wrap;
    }

    .seller-rating {
        display: flex;
        align-items: center;
        gap: 0.5rem;
        flex-wrap: wrap;
    }

    .rating-stars {
        color: #ffb400;
    }

    .rating-text {
        font-weight: 600;
    }

    .top-rated-badge {
        background-color: #ffb400;
        color: white;
        padding: 0.25rem 0.5rem;
        border-radius: 4px;
        font-size: 0.8rem;
        font-weight: 600;
    }

    /* ===== PRODUCT IMAGE ===== */
    .product-image-section {
        margin: 0.1rem 0;
        text-align: center;
        width: 100%;
    }

    .product-image {
        width: 100%;
        max-width: 100%;
        height: auto;
        border-radius: var(--border-radius);
        box-shadow: var(--shadow);
        object-fit: cover;
    }

    /* Mobile-specific image */
    .mobile-image {
        display: none;
    }

    /* ===== PACKAGE SELECTOR SECTION ===== */
    .package-selector-section {
        margin-bottom: 0.6rem;
        width: 100%;
    }

    .section-title {
        font-size: 1.25rem;
        font-weight: 600;
        margin-bottom: 0.6rem;
        color: var(--dark);
    }

    .score-selector {
        width: 100%;
        max-width: 320px;
        background: white;
        border-radius: 16px;
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
        overflow: hidden;
        margin: 0 auto;
        -webkit-user-select: none;
        -moz-user-select: none;
        -ms-user-select: none;
        user-select: none;
        touch-action: pan-y;
    }

    .picker-container {
        position: relative;
        height: 180px;
        overflow: hidden;
        background: white;
        cursor: pointer;
    }

    .picker-overlay {
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        pointer-events: none;
        z-index: 2;
    }

    .picker-gradient {
        position: absolute;
        left: 0;
        right: 0;
        height: 70px;
        background: linear-gradient(to bottom, white, rgb(255 255 255 / 34%));
    }

    .picker-gradient.top {
        top: 0;
    }

    .picker-gradient.bottom {
        bottom: 0;
        background: linear-gradient(to top, white, rgb(255 255 255 / 34%));
    }

    .picker-selection {
        position: absolute;
        top: 50%;
        left: 0;
        right: 0;
        height: 40px;
        transform: translateY(-50%);
        border-top: 2px solid #14a800;
        border-bottom: 2px solid #14a800;
        background: rgb(240 249 255 / 17%);
        pointer-events: none;
        z-index: 1;
    }

    .picker-wheel {
        display: flex;
        flex-direction: column;
        align-items: center;
        padding: 60px 0;
        transition: transform 0.3s cubic-bezier(0.2, 0, 0, 1);
        will-change: transform;
    }

    .score-option {
        height: 40px;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 18px;
        font-weight: 400;
        color: #000000;
        transition: all 0.2s ease;
        flex-shrink: 0;
    }

    .score-option.selected {
        color: #000000;
        font-size: 22px;
        font-weight: 600;
    }

    /* ===== PRICE CALCULATION RESULT ===== */
    .price-calculation-result {
        background-color: #f0f9ff;
        border: 1px solid var(--primary);
        border-radius: 12px;
        padding: 0.6rem;
        margin: 1rem 0;
        display: none;
        animation: fadeIn 0.4s ease;
        width: 100%;
        box-sizing: border-box;
    }

    /* Show price calculation result on mobile only */
    @media (max-width: 768px) {
        .price-calculation-result.active {
            display: block;
        }
    }

    /* Hide price calculation result on desktop */
    @media (min-width: 769px) {
        .price-calculation-result {
            display: none !important;
        }
    }

    .calculation-title {
        font-weight: 600;
        color: var(--dark);
        margin-bottom: 0.3rem;
        font-size: 1.2rem;
        text-align: center;
    }

    .calculation-details {
        display: grid;
        grid-template-columns: 1.5fr 1.5fr;
        gap: 1rem;
        margin-bottom: 1rem;
        width: 100%;
    }

    .calculation-item {
        display: flex;
        flex-direction: column;
        text-align: center;
    }

    .calculation-label {
        font-size: 0.9rem;
        color: var(--gray);
        margin-bottom: 0.25rem;
    }

    .calculation-value {
        font-weight: 600;
        color: var(--dark);
        font-size: 1.1rem;
    }

    .calculation-total {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding-top: 0.1rem;
        border-top: 1px solid #e5e7eb;
        margin-top: 1rem;
    }

    .total-label {
        font-weight: 700;
        font-size: 1.2rem;
    }

    .total-price {
        font-weight: 700;
        color: var(--primary);
        font-size: 1.5rem;
    }

    /* ===== PRODUCT SELECTION SUMMARY ===== */
    .product-summary {
        background-color: #f0f9ff;
        border: 1px solid var(--primary);
        border-radius: var(--border-radius);
        padding: 0.75rem 1rem;
        margin: 1rem 0;
        display: none;
        width: 100%;
        box-sizing: border-box;
    }

    .summary-title {
        font-weight: 600;
        color: var(--dark);
        margin-bottom: 0.25rem;
        font-size: 1.1rem;
    }

    .summary-content {
        line-height: 1.4;
        width: 100%;
    }

    .summary-score {
        font-weight: 700;
        color: var(--primary);
        font-size: 1.2rem;
        margin-bottom: 0.5rem;
    }

    .summary-content .delivery-details {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 0.5rem;
        margin-bottom: 0.5rem;
        width: 100%;
    }

    .summary-content .delivery-item {
        display: flex;
        flex-direction: column;
        margin-bottom: 0;
    }

    .summary-content .delivery-label {
        font-size: 0.8rem;
        color: var(--gray);
        margin-bottom: 0.1rem;
    }

    .summary-content .delivery-value {
        font-weight: 600;
        color: var(--dark);
        font-size: 0.9rem;
    }

    .summary-content .delivery-note {
        font-size: 0.75rem;
        color: var(--gray);
        font-style: italic;
        margin-top: 0.25rem;
        line-height: 1.2;
    }

    @keyframes fadeIn {
        from { opacity: 0; transform: translateY(-10px); }
        to { opacity: 1; transform: translateY(0); }
    }

    /* ===== PAYMENT PROTECTION SECTION ===== */
    .payment-protection-section {
        background: white;
        border-radius: 12px;
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
        padding: 1.5rem;
        margin: 1.5rem 0;
        width: 100%;
    }

    .payment-protection {
        display: flex;
        align-items: flex-start;
        gap: 1rem;
        width: 100%;
    }

    .protection-icon {
        width: 48px;
        height: 48px;
        flex-shrink: 0;
        color: var(--primary);
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .protection-icon svg {
        width: 100%;
        height: 100%;
    }

    .protection-content {
        flex: 1;
        min-width: 0;
    }

    .protection-title {
        font-size: 1.25rem;
        font-weight: 600;
        color: var(--dark);
        margin-bottom: 0.5rem;
        word-wrap: break-word;
    }

    .protection-description {
        color: var(--gray);
        line-height: 1.6;
        font-size: 1rem;
        word-wrap: break-word;
    }

    /* ===== FIXED BOTTOM PANEL ===== */
    .fixed-bottom-panel {
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        background: white;
        box-shadow: 0 -4px 6px -1px rgba(0, 0, 0, 0.1);
        padding: 1.5rem 0;
        z-index: 1000;
        width: 100%;
    }

    .bottom-panel-content {
        display: flex;
        justify-content: space-between;
        align-items: center;
        flex-wrap: wrap;
        gap: 1rem;
        width: 100%;
    }

    .delivery-info {
        display: flex;
        gap: 2rem;
        flex-wrap: wrap;
    }

    .delivery-item {
        display: flex;
        flex-direction: column;
    }

    .delivery-label {
        font-size: 0.9rem;
        color: var(--gray);
        margin-bottom: 0.25rem;
    }

    .delivery-value {
        font-weight: 600;
        color: var(--dark);
    }

    .panel-actions {
        display: flex;
        align-items: center;
        gap: 1rem;
        flex-wrap: wrap;
    }

    .continue-btn {
        background-color: var(--primary);
        color: white;
        border: none;
        border-radius: var(--border-radius);
        padding: 0.75rem 1.5rem;
        font-weight: 600;
        border-radius: 12px;
        cursor: pointer;
        transition: var(--transition);
        min-width: 150px;
        white-space: nowrap;
    }

    .continue-btn:hover {
        background-color: #0d8a00;
    }

    .continue-btn:disabled {
        background-color: #9ca3af;
        cursor: not-allowed;
    }

    .message-seller {
        color: var(--secondary);
        text-decoration: none;
        font-weight: 600;
        white-space: nowrap;
    }

    /* ===== SIDEBAR ===== */
    .sidebar {
        background: white;
        border-radius: var(--border-radius);
        box-shadow: var(--shadow);
        padding: 1.5rem;
        height: fit-content;
        position: fixed;
        top: 7rem;
        right: calc(40% - 600px + 20px);
        width: 380px;
        box-sizing: border-box;
        z-index: 100;
    }

    .main-content-area {
        position: relative;
    }
    
    .main-content {
        align-items: start;
        position: relative;
    }
    
    /* Hide sidebar on mobile */
    @media (max-width: 768px) {
        .sidebar {
            display: none;
        }
    }

    /* Show sidebar on desktop */
    @media (min-width: 769px) {
        .sidebar {
            display: block;
        }
    }

    .sidebar-title {
        font-size: 1.25rem;
        font-weight: 600;
        margin-bottom: 1.5rem;
        color: var(--dark);
        word-wrap: break-word;
    }

    .package-details {
        margin-bottom: 1.5rem;
        width: 100%;
    }

    .package-score {
        font-size: 2rem;
        font-weight: 700;
        color: var(--dark);
        margin-bottom: 1rem;
        word-wrap: break-word;
    }

    .delivery-details {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 1rem;
        margin-bottom: 1rem;
        width: 100%;
    }

    .delivery-note {
        font-size: 0.9rem;
        color: var(--gray);
        font-style: italic;
        word-wrap: break-word;
    }

    /* ===== NEW SECTIONS ===== */
    /* Description Section */
    .description-section {
        background: white;
        border-radius: var(--border-radius);
        box-shadow: var(--shadow);
        padding: 1.5rem;
        margin: 1.5rem 0;
        width: 100%;
    }

    .description-title {
        font-size: 1.5rem;
        font-weight: 600;
        margin-bottom: 1.5rem;
        color: var(--dark);
        padding-bottom: 0.5rem;
        border-bottom: 2px solid var(--primary);
        word-wrap: break-word;
    }

    .description-content {
        line-height: 1.7;
        width: 100%;
    }

    .description-content p {
        margin-bottom: 1rem;
        word-wrap: break-word;
    }

    .details-button {
        background-color: var(--primary);
        color: white;
        border: none;
        border-radius: var(--border-radius);
        padding: 0.75rem 1.5rem;
        font-weight: 600;
        cursor: pointer;
        transition: var(--transition);
        margin-top: 1rem;
        width: auto;
    }

    .details-button:hover {
        background-color: #0d8a00;
    }

    .details-content {
        display: none;
        margin-top: 1.5rem;
        padding-top: 1.5rem;
        border-top: 1px solid #e5e7eb;
        width: 100%;
    }

    .details-content.active {
        display: block;
    }

    .details-content h3 {
        font-size: 1.2rem;
        margin-bottom: 1rem;
        color: var(--dark);
        word-wrap: break-word;
    }

    .details-content ul, .details-content ol {
        margin-left: 1.5rem;
        margin-bottom: 1.5rem;
    }

    .details-content li {
        margin-bottom: 0.5rem;
        word-wrap: break-word;
    }

    /* Reviews Section */
    .reviews-section {
        background: white;
        border-radius: var(--border-radius);
        box-shadow: var(--shadow);
        padding: 1.5rem;
        margin: 1.5rem 0;
        width: 100%;
    }

    .reviews-title {
        font-size: 1.5rem;
        font-weight: 600;
        margin-bottom: 1.5rem;
        color: var(--dark);
        padding-bottom: 0.5rem;
        border-bottom: 2px solid var(--primary);
        word-wrap: break-word;
    }

    .review {
        border-bottom: 1px solid #e5e7eb;
        padding: 1.5rem 0;
        width: 100%;
    }

    .review:last-child {
        border-bottom: none;
    }

    .review-header {
        display: flex;
        justify-content: space-between;
        align-items: center;
        margin-bottom: 0.75rem;
        flex-wrap: wrap;
        gap: 0.5rem;
    }

    .reviewer-name {
        font-weight: 600;
        color: var(--dark);
    }

    .review-date {
        color: var(--gray);
        font-size: 0.9rem;
    }

    .review-rating {
        color: #ffb400;
        margin-bottom: 0.75rem;
    }

    .review-text {
        line-height: 1.6;
        word-wrap: break-word;
    }

    .load-more-reviews {
        background-color: #f8fafc;
        color: var(--dark);
        border: 1px solid #e5e7eb;
        border-radius: var(--border-radius);
        padding: 0.75rem 1.5rem;
        font-weight: 600;
        cursor: pointer;
        transition: var(--transition);
        display: block;
        margin: 1.5rem auto 0;
        width: 200px;
        text-align: center;
    }

    .load-more-reviews:hover {
        background-color: #e5e7eb;
    }

    .load-more-reviews:disabled {
        opacity: 0.6;
        cursor: not-allowed;
    }

    .load-more-reviews.loading {
        position: relative;
        color: transparent;
    }

    .load-more-reviews.loading::after {
        content: '';
        position: absolute;
        width: 20px;
        height: 20px;
        top: 50%;
        left: 50%;
        margin-left: -10px;
        margin-top: -10px;
        border: 2px solid #f3f3f3;
        border-top: 2px solid var(--primary);
        border-radius: 50%;
        animation: spin 1s linear infinite;
    }

    @keyframes spin {
        0% { transform: rotate(0deg); }
        100% { transform: rotate(360deg); }
    }

    /* FAQ Section */
    .faq-section {
        background: white;
        border-radius: var(--border-radius);
        box-shadow: var(--shadow);
        padding: 1.5rem;
        margin: 1.5rem 0;
        width: 100%;
    }

    .faq-title {
        font-size: 1.5rem;
        font-weight: 600;
        margin-bottom: 1.5rem;
        color: var(--dark);
        padding-bottom: 0.5rem;
        border-bottom: 2px solid var(--primary);
        word-wrap: break-word;
    }

    .faq-item {
        border-bottom: 1px solid #e5e7eb;
        padding: 1.5rem 0;
        width: 100%;
    }

    .faq-item:last-child {
        border-bottom: none;
    }

    .faq-question {
        font-weight: 600;
        cursor: pointer;
        display: flex;
        justify-content: space-between;
        align-items: center;
        transition: var(--transition);
        word-wrap: break-word;
    }

    .faq-question:hover {
        color: var(--primary);
    }

    .faq-question::after {
        content: '+';
        font-size: 1.5rem;
        transition: var(--transition);
        flex-shrink: 0;
        margin-left: 1rem;
    }

    .faq-question.active::after {
        content: '-';
        color: var(--primary);
    }

    .faq-answer {
        display: none;
        margin-top: 1rem;
        line-height: 1.7;
        color: var(--gray);
        word-wrap: break-word;
    }

    .faq-answer.active {
        display: block;
    }
    
    /* ===== RESPONSIVE DESIGN ===== */
    @media (max-width: 768px) {
        .main-content {
            grid-template-columns: 1fr;
            gap: 1rem;
            padding: 0.3rem 0;
        }
        
        .sidebar {
            position: static;
            margin-bottom: 2rem;
            display: none;
        }

        .bottom-panel-content {
            flex-direction: column;
            align-items: flex-start;
        }

        .delivery-info {
            width: 100%;
            justify-content: space-between;
            gap: 1rem;
        }

        .panel-actions {
            width: 100%;
            justify-content: space-between;
            gap: 1rem;
        }

        .continue-btn {
            width: 60%;
            min-width: 120px;
        }

        .description-section,
        .reviews-section,
        .faq-section,
        .payment-protection-section {
            padding: 1.5rem;
            margin: 1rem 0;
        }

        .product-summary {
            padding: 1rem;
        }

        .payment-protection {
            flex-direction: column;
            text-align: center;
            gap: 0.2rem;
        }
        
        .protection-icon {
            margin: 0 auto;
        }

        /* Mobile image display */
        .pc-image {
            display: none;
        }
        
        .mobile-image {
            display: block;
        }

        /* Fix container padding for mobile */
        .container {
            padding: 0 15px;
        }

        /* Adjust font sizes for mobile */
        .service-title {
            font-size: 1.5rem;
        }

        .section-title {
            font-size: 1.1rem;
        }

        /* Quick nav mobile styles */
        .quick-nav-grid {
            grid-template-columns: 1fr;
            gap: 0.5rem;
        }

        .quick-nav-item {
            padding: 0.875rem;
        }

        .content-quick-nav {
            padding: 1.25rem;
            margin: 1rem 0;
        }
    }

    @media (min-width: 769px) {
        /* PC image display */
        .pc-image {
            display: block;
        }
        
        .mobile-image {
            display: none;
        }

        /* Hide product summary on desktop */
        .product-summary {
            display: none !important;
        }

        /* Show sidebar on desktop */
        .sidebar {
            display: block;
        }
    }

    @media (max-width: 480px) {
        .service-title {
            font-size: 1.5rem;
        }

        .delivery-info {
            gap: 1rem;
            flex-direction: column;
        }

        .panel-actions {
            flex-direction: column;
            width: 100%;
            gap: 0.5rem;
        }

        .continue-btn {
            width: 100%;
            min-width: auto;
        }

        .message-seller {
            align-self: flex-start;
        }

        .description-section,
        .reviews-section,
        .faq-section,
        .payment-protection-section {
            padding: 1rem;
            margin: 0.75rem 0;
        }

        .product-summary {
            padding: 0.75rem;
        }

        .protection-title {
            font-size: 1.1rem;
        }
        
        .protection-description {
            font-size: 0.9rem;
        }

        /* Adjust container padding for very small screens */
        .container {
            padding: 0 10px;
        }

        /* Adjust body padding for very small screens */
        body {
            padding-bottom: 140px;
        }

        /* Quick nav ultra-mobile */
        .quick-nav-item {
            padding: 0.75rem;
        }

        .nav-main {
            font-size: 0.9rem;
        }

        .nav-sub {
            font-size: 0.75rem;
        }
    }

    /* Additional fixes for ultra-small screens */
    @media (max-width: 360px) {
        .container {
            padding: 0 8px;
        }
        
        .service-title {
            font-size: 1.3rem;
        }
        
        .continue-btn {
            padding: 0.6rem 1rem;
            font-size: 0.9rem;
        }
        
        .panel-actions {
            gap: 0.25rem;
        }
    }
</style>