.pt-shell {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 20px 80px;
}

.pt-page-header {
    text-align: center;
    margin-bottom: 40px;
    padding-top: 20px;
}

.pt-header-link {
    display: inline-block;
    text-decoration: none;
    color: inherit;
}

.pt-header-link:hover {
    text-decoration: none;
}

.pt-title-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    margin-bottom: 10px;
}

.pt-logo {
    height: 64px;
    width: auto;
    border-radius: 18px;
}

.pt-page-header h1 {
    margin: 0;
    color: var(--gray-900);
    font-size: 3rem;
    font-weight: 800;
    letter-spacing: -0.03em;
}

.pt-subtitle {
    margin: 0;
    color: var(--gray-500);
    font-size: 1.15rem;
    font-weight: 500;
}

.pt-card {
    background: white;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-xl);
    padding: 40px;
    margin-bottom: 30px;
    box-shadow: var(--shadow-md);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.pt-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.pt-card h2 {
    text-align: center;
    color: var(--gray-900);
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 24px;
}

.pt-hero-text {
    max-width: 840px;
    margin: 0 auto 32px;
    text-align: center;
    color: var(--gray-600);
    font-size: 1.1rem;
    line-height: 1.8;
}

.pt-model-container {
    max-width: 320px;
    margin: 0 auto 28px;
}

.pt-model {
    width: 100%;
    height: 300px;
    display: block;
}

.pt-features-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 25px;
    margin-top: 12px;
}

.pt-feature,
.pt-feature-item,
.pt-download-card,
.pt-support-item {
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.pt-feature:hover,
.pt-feature-item:hover,
.pt-download-card:hover,
.pt-support-item:hover {
    transform: translateY(-3px);
    border-color: var(--secondary-color);
    box-shadow: var(--shadow-md);
}

.pt-feature {
    text-align: center;
    padding: 30px 22px;
}

.pt-feature h3,
.pt-feature-item h3,
.pt-support-item h3 {
    color: var(--secondary-color);
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 14px;
}

.pt-feature p,
.pt-feature-item p,
.pt-download-card p,
.pt-support-item p {
    color: var(--gray-600);
    line-height: 1.7;
}

.pt-device-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 30px;
}

.pt-feature-item {
    padding: 28px;
}

.pt-feature-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.pt-feature-list li {
    color: var(--gray-600);
    margin-bottom: 12px;
    padding-left: 22px;
    position: relative;
    line-height: 1.7;
}

.pt-feature-list li::before {
    content: "•";
    position: absolute;
    left: 0;
    top: 0;
    color: var(--secondary-color);
    font-weight: 700;
}

.pt-app-section {
    text-align: center;
}

.pt-app-title {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 14px;
    flex-wrap: wrap;
    margin-bottom: 14px;
}

.pt-app-title h2 {
    margin-bottom: 0;
}

.pt-app-icon {
    width: 56px;
    height: 56px;
    border-radius: 16px;
    box-shadow: var(--shadow-md);
}

.pt-legal-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin: 28px 0;
}

.pt-app-features {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
    margin: 0 auto 30px;
    max-width: 920px;
}

.pt-app-feature {
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    padding: 18px;
    color: var(--gray-700);
    font-weight: 500;
}

.pt-download-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
    max-width: 860px;
    margin: 0 auto;
}

.pt-download-card {
    text-align: center;
    padding: 28px 24px;
}

.pt-platform {
    color: var(--secondary-color);
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.03em;
    text-transform: uppercase;
}

.pt-qr {
    width: 168px;
    height: 168px;
    display: block;
    margin: 18px auto 12px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-200);
    box-shadow: var(--shadow-sm);
}

.pt-download-card .btn {
    width: 100%;
}

.pt-steps {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.pt-step {
    display: flex;
    gap: 18px;
    align-items: flex-start;
    padding: 22px;
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
}

.pt-step-number {
    width: 40px;
    height: 40px;
    flex-shrink: 0;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--secondary-color);
    color: white;
    font-weight: 700;
}

.pt-step-copy h3 {
    color: var(--gray-900);
    font-size: 1.2rem;
    margin-bottom: 8px;
}

.pt-step-copy p {
    color: var(--gray-600);
    line-height: 1.7;
}

.pt-support-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
}

.pt-support-item {
    text-align: center;
    padding: 30px 24px;
}

.pt-support-item .btn {
    margin-top: 16px;
}

.pt-guide-overview {
    display: grid;
    grid-template-columns: minmax(0, 1.4fr) minmax(280px, 0.9fr);
    gap: 28px;
    align-items: start;
}

.pt-guide-copy h2,
.pt-guide-image-card h3 {
    text-align: left;
}

.pt-guide-copy h2 {
    margin-bottom: 18px;
}

.pt-guide-copy p,
.pt-guide-block p {
    color: var(--gray-600);
    line-height: 1.8;
}

.pt-guide-links {
    display: grid;
    gap: 16px;
    margin-top: 22px;
}

.pt-guide-link-card {
    display: block;
    padding: 18px 20px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-200);
    background: var(--gray-50);
    text-decoration: none;
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.pt-guide-link-card:hover {
    text-decoration: none;
    transform: translateY(-2px);
    border-color: var(--secondary-color);
    box-shadow: var(--shadow-md);
}

.pt-guide-link-card strong {
    display: block;
    color: var(--gray-900);
    font-size: 1.05rem;
    margin-bottom: 6px;
}

.pt-guide-link-card span {
    display: block;
    color: var(--gray-600);
    line-height: 1.7;
}

.pt-guide-image-card {
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    padding: 24px;
}

.pt-guide-image-card p {
    color: var(--gray-600);
    line-height: 1.7;
    margin-bottom: 18px;
}

.pt-guide-image-card img {
    display: block;
    width: 100%;
    max-width: 320px;
    height: auto;
    margin: 0 auto;
    border-radius: var(--radius-lg);
}

.pt-guide-block + .pt-guide-block {
    margin-top: 32px;
    padding-top: 32px;
    border-top: 1px solid var(--gray-200);
}

.pt-guide-block h3 {
    color: var(--secondary-color);
    font-size: 1.45rem;
    margin-bottom: 16px;
}

.pt-guide-block h4 {
    color: var(--gray-900);
    font-size: 1.05rem;
    margin: 20px 0 10px;
}

.pt-guide-list,
.pt-guide-steps {
    color: var(--gray-600);
    line-height: 1.8;
    padding-left: 1.25rem;
    margin: 14px 0;
}

.pt-guide-list li,
.pt-guide-steps li {
    margin-bottom: 10px;
}

.pt-guide-note {
    margin-top: 18px;
    padding: 16px 18px;
    border-left: 4px solid var(--secondary-color);
    background: var(--gray-50);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    color: var(--gray-700);
    line-height: 1.7;
}

@media screen and (max-width: 900px) {
    .pt-features-grid,
    .pt-device-grid,
    .pt-app-features,
    .pt-download-grid,
    .pt-support-grid,
    .pt-guide-overview {
        grid-template-columns: 1fr;
    }
}

@media screen and (max-width: 768px) {
    .pt-page-header h1 {
        font-size: 2.4rem;
    }

    .pt-card {
        padding: 28px;
    }

    .pt-step {
        flex-direction: column;
        text-align: center;
    }

    .pt-step-number {
        margin: 0 auto;
    }
}

@media screen and (max-width: 480px) {
    .pt-shell {
        padding: 28px 16px 60px;
    }

    .pt-title-row {
        flex-direction: column;
        gap: 14px;
    }

    .pt-page-header h1 {
        font-size: 2rem;
    }

    .pt-card {
        padding: 22px;
    }

    .pt-qr {
        width: 144px;
        height: 144px;
    }
}