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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #fff;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: #fff;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    padding: 0.5rem 0;
}

.header-container {
    max-width: 1080px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo img {
    height: 70px;
    width: auto;
}

.menu-toggle {
    display: flex;
    align-items: center;
    gap: 8px;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 16px;
    color: #333;
    padding: 8px 12px;
    transition: color 0.3s;
}

.menu-toggle:hover {
    color: #007bff;
}

.menu-icon {
    font-size: 24px;
    font-weight: bold;
}

/* Side Menu */
.side-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 100%;
    max-width: 400px;
    height: 100vh;
    z-index: 2000;
    transition: right 0.3s ease-in-out;
}

.side-menu.active {
    right: 0;
}

.side-menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s, visibility 0.3s;
}

.side-menu.active .side-menu-overlay {
    opacity: 1;
    visibility: visible;
}

.side-menu-content {
    position: absolute;
    top: 0;
    right: 0;
    width: 100%;
    max-width: 400px;
    height: 100%;
    background-color: #fff;
    box-shadow: -2px 0 8px rgba(0, 0, 0, 0.1);
    padding: 2rem;
    overflow-y: auto;
}

.menu-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: none;
    border: none;
    font-size: 32px;
    color: #333;
    cursor: pointer;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.3s;
}

.menu-close:hover {
    color: #007bff;
}

.menu-list {
    list-style: none;
    margin-top: 3rem;
}

.menu-list li {
    margin-bottom: 1rem;
}

.menu-list a {
    display: block;
    padding: 1rem;
    text-decoration: none;
    color: #333;
    font-size: 18px;
    border-bottom: 1px solid #eee;
    transition: color 0.3s, padding-left 0.3s;
}

.menu-list a:hover {
    color: #007bff;
    padding-left: 1.5rem;
}

/* Main Content */
.main-content {
    margin-top: 90px;
}

.content-section {
    padding: 0;
}

.image-container {
    max-width: 1080px;
    margin: 0 auto;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
}

.image-container img {
    max-width: 100%;
    width: 100%;
    height: auto;
    display: block;
    object-fit: contain;
}

/* Info Section */
.info-section {
    background-color: #fff;
    padding: 3rem 0;
}

.info-container {
    max-width: 1080px;
    margin: 0 auto;
    padding: 0 20px;
}

.info-title {
    font-size: 32px;
    font-weight: bold;
    color: #333;
    text-align: center;
    margin-bottom: 3rem;
    padding-bottom: 1.5rem;
    border-bottom: 3px solid #007bff;
}

.advantage-list {
    margin-bottom: 3rem;
}

.advantage-item {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 2rem;
    padding: 1.5rem;
    background-color: #f8f9fa;
    border-radius: 8px;
    border-left: 4px solid #007bff;
}

.advantage-number {
    flex-shrink: 0;
    width: 50px;
    height: 50px;
    background-color: #007bff;
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: bold;
}

.advantage-content h3 {
    font-size: 20px;
    font-weight: bold;
    color: #333;
    margin-bottom: 0.5rem;
}

.advantage-content p {
    font-size: 16px;
    color: #666;
    line-height: 1.8;
}

.warning-text {
    color: #dc3545;
    font-weight: 600;
}

.version-section,
.comparison-section,
.error-section,
.notice-section {
    margin-bottom: 3rem;
    padding: 2rem;
    background-color: #f8f9fa;
    border-radius: 8px;
}

.section-title {
    font-size: 24px;
    font-weight: bold;
    color: #333;
    margin-bottom: 1.5rem;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid #007bff;
}

.version-note {
    font-size: 16px;
    color: #666;
    margin-bottom: 1rem;
}

.version-features,
.comparison-list {
    list-style: none;
    padding-left: 0;
}

.version-features li,
.comparison-list li {
    padding: 0.75rem 0;
    padding-left: 1.5rem;
    position: relative;
    font-size: 16px;
    color: #333;
    line-height: 1.8;
}

.version-features li:before,
.comparison-list li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: #007bff;
    font-weight: bold;
    font-size: 18px;
}

.comparison-subtitle {
    font-size: 18px;
    font-weight: 600;
    color: #555;
    margin-bottom: 1rem;
}

.highlight-text {
    font-size: 20px;
    font-weight: bold;
    color: #007bff;
    text-align: center;
    margin-top: 1.5rem;
    padding: 1rem;
    background-color: #e7f3ff;
    border-radius: 6px;
}

.error-list {
    padding-left: 1.5rem;
    margin-bottom: 1.5rem;
}

.error-list li {
    font-size: 16px;
    color: #333;
    margin-bottom: 0.5rem;
    line-height: 1.8;
}

.solution-box {
    background-color: #fff;
    padding: 1.5rem;
    border-radius: 6px;
    border: 2px solid #007bff;
}

.solution-box h3 {
    font-size: 18px;
    font-weight: bold;
    color: #007bff;
    margin-bottom: 1rem;
}

.solution-box ol {
    padding-left: 1.5rem;
    margin-bottom: 1rem;
}

.solution-box li {
    font-size: 16px;
    color: #333;
    margin-bottom: 0.5rem;
    line-height: 1.8;
}

.solution-box p {
    font-size: 14px;
    color: #666;
    line-height: 1.8;
}

.notice-subtitle {
    font-size: 20px;
    font-weight: bold;
    color: #333;
    margin-top: 2rem;
    margin-bottom: 1rem;
}

.notice-item {
    margin-bottom: 2rem;
    padding: 1.5rem;
    background-color: #fff;
    border-radius: 6px;
    border-left: 4px solid #ffc107;
}

.notice-item h4 {
    font-size: 18px;
    font-weight: bold;
    color: #333;
    margin-bottom: 1rem;
}

.notice-item p {
    font-size: 16px;
    color: #666;
    line-height: 1.8;
    margin-bottom: 1rem;
}

.quote-text {
    font-style: italic;
    color: #555;
    background-color: #f8f9fa;
    padding: 0.75rem;
    border-radius: 4px;
    margin: 1rem 0;
}

.notice-item ul {
    padding-left: 1.5rem;
    margin: 1rem 0;
}

.notice-item ul li {
    font-size: 16px;
    color: #666;
    line-height: 1.8;
    margin-bottom: 0.5rem;
}

.recommendation-section {
    margin-top: 2rem;
}

.recommendation-box {
    background-color: #fff;
    padding: 1.5rem;
    border-radius: 6px;
    border: 2px solid #28a745;
}

.recommendation-box h4 {
    font-size: 18px;
    font-weight: bold;
    color: #28a745;
    margin-bottom: 1rem;
}

.recommendation-box p {
    font-size: 16px;
    color: #666;
    line-height: 1.8;
    margin-bottom: 1rem;
}

.note-text {
    font-size: 14px;
    color: #555;
    line-height: 1.8;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid #ddd;
}

.settings-section {
    margin-top: 2rem;
}

.settings-list {
    list-style: none;
    padding-left: 0;
    margin-bottom: 1.5rem;
}

.settings-list li {
    padding: 1rem;
    margin-bottom: 1rem;
    background-color: #fff;
    border-radius: 6px;
    border-left: 4px solid #6c757d;
}

.settings-list li strong {
    font-size: 16px;
    color: #333;
    display: block;
    margin-bottom: 0.5rem;
}

.settings-list li {
    font-size: 15px;
    color: #666;
    line-height: 1.8;
}

/* Footer */
.footer {
    background-color: #f8f9fa;
    padding: 2rem 0;
    margin-top: 4rem;
    border-top: 1px solid #eee;
}

.footer-container {
    max-width: 1080px;
    margin: 0 auto;
    padding: 0 20px;
    text-align: center;
}

.footer-container p {
    color: #666;
    font-size: 14px;
}

/* Responsive */
@media (max-width: 768px) {
    .header-container {
        padding: 0 15px;
    }

    .logo img {
        height: 50px;
    }

    .menu-toggle span:first-child {
        display: none;
    }

    .side-menu {
        max-width: 100%;
    }

    .side-menu-content {
        max-width: 100%;
    }

    .image-container {
        padding: 0;
    }

    .info-container {
        padding: 0 15px;
    }

    .info-title {
        font-size: 24px;
    }

    .advantage-item {
        flex-direction: column;
        gap: 1rem;
    }

    .advantage-number {
        width: 40px;
        height: 40px;
        font-size: 20px;
    }

    .section-title {
        font-size: 20px;
    }

    .main-content {
        margin-top: 80px;
    }

    .content-section {
        padding: 0;
    }
}

/* Guide Section - Modern Dark Theme */
.guide-section {
    padding: 4rem 0;
    color: #fff;
}

.guide-container {
    max-width: 1080px;
    margin: 0 auto;
    padding: 3rem 20px;
    background-color: #000;
    border-radius: 12px;
}

.guide-title {
    font-size: 28px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 2rem;
    position: relative;
    padding-left: 1rem;
    border-left: 4px solid #00d4ff;
}

.notice-main-title {
    font-size: 24px;
    font-weight: 600;
    color: #fff;
    margin-top: 3rem;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid #333;
}

/* Error Guide */
.error-guide {
    margin-bottom: 4rem;
}

.error-list-modern {
    list-style: none;
    padding-left: 0;
    margin: 1.5rem 0;
}

.error-list-modern li {
    font-size: 18px;
    color: #fff;
    padding: 1rem 1.5rem;
    margin-bottom: 0.75rem;
    background: linear-gradient(135deg, #1a1a1a 0%, #2a2a2a 100%);
    border-left: 4px solid #ff6b6b;
    border-radius: 6px;
    position: relative;
    padding-left: 3rem;
    transition: transform 0.2s, box-shadow 0.2s;
}

.error-list-modern li:hover {
    transform: translateX(5px);
    box-shadow: 0 4px 12px rgba(255, 107, 107, 0.3);
}

.error-list-modern li:before {
    content: "⚠";
    position: absolute;
    left: 1rem;
    font-size: 20px;
}

.solution-modern {
    background: linear-gradient(135deg, #1a1a1a 0%, #2a2a2a 100%);
    padding: 2rem;
    border-radius: 12px;
    border: 2px solid #00d4ff;
    margin-top: 2rem;
    box-shadow: 0 8px 24px rgba(0, 212, 255, 0.2);
}

.solution-title {
    font-size: 22px;
    font-weight: 700;
    color: #00d4ff;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.solution-title:before {
    content: "→";
    font-size: 24px;
}

.solution-steps {
    list-style: none;
    padding-left: 0;
    margin: 1.5rem 0;
}

.solution-steps li {
    font-size: 18px;
    color: #fff;
    padding: 1rem 1.5rem;
    margin-bottom: 0.75rem;
    background-color: rgba(0, 212, 255, 0.1);
    border-left: 4px solid #00d4ff;
    border-radius: 6px;
    position: relative;
    padding-left: 3rem;
}

.solution-steps li:before {
    content: counter(step-counter);
    counter-increment: step-counter;
    position: absolute;
    left: 1rem;
    width: 28px;
    height: 28px;
    background-color: #00d4ff;
    color: #000;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 14px;
}

.solution-steps {
    counter-reset: step-counter;
}

.solution-note {
    font-size: 16px;
    color: #aaa;
    margin-top: 1.5rem;
    padding: 1rem;
    background-color: rgba(255, 255, 255, 0.05);
    border-radius: 6px;
    border-left: 3px solid #ffa500;
}

/* Notice Guide */
.notice-guide {
    margin-bottom: 4rem;
}

.notice-card {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 2rem;
    padding: 2rem;
    background: linear-gradient(135deg, #1a1a1a 0%, #2a2a2a 100%);
    border-radius: 12px;
    border-left: 4px solid #ffa500;
    transition: transform 0.2s, box-shadow 0.2s;
}

.notice-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(255, 165, 0, 0.2);
}

.notice-number {
    flex-shrink: 0;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #ffa500 0%, #ff8c00 100%);
    color: #000;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: bold;
    box-shadow: 0 4px 12px rgba(255, 165, 0, 0.3);
}

.notice-content h4 {
    font-size: 20px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 1rem;
}

.notice-content p {
    font-size: 16px;
    color: #ddd;
    line-height: 1.8;
    margin-bottom: 1rem;
}

.quote-modern {
    font-style: italic;
    color: #00d4ff;
    background-color: rgba(0, 212, 255, 0.1);
    padding: 1rem;
    border-radius: 6px;
    margin: 1rem 0;
    border-left: 3px solid #00d4ff;
}

.notice-list {
    list-style: none;
    padding-left: 0;
    margin: 1rem 0;
}

.notice-list li {
    font-size: 16px;
    color: #ddd;
    line-height: 1.8;
    margin-bottom: 0.75rem;
    padding-left: 1.5rem;
    position: relative;
}

.notice-list li:before {
    content: "•";
    position: absolute;
    left: 0;
    color: #00d4ff;
    font-size: 20px;
    font-weight: bold;
}

.warning-modern {
    color: #ff6b6b;
    font-weight: 600;
    padding: 1rem;
    background-color: rgba(255, 107, 107, 0.1);
    border-radius: 6px;
    border-left: 3px solid #ff6b6b;
    margin: 1rem 0;
}

/* Recommendation Guide */
.recommendation-guide {
    margin-bottom: 4rem;
}

.recommendation-title {
    font-size: 24px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid #333;
}

.recommendation-card {
    background: linear-gradient(135deg, #1a1a1a 0%, #2a2a2a 100%);
    padding: 2rem;
    border-radius: 12px;
    border: 2px solid #00ff88;
    box-shadow: 0 8px 24px rgba(0, 255, 136, 0.2);
}

.recommendation-subtitle {
    font-size: 20px;
    font-weight: 700;
    color: #00ff88;
    margin-bottom: 1.5rem;
}

.recommendation-card p {
    font-size: 16px;
    color: #ddd;
    line-height: 1.8;
    margin-bottom: 1rem;
}

.note-box {
    margin-top: 2rem;
    padding: 1.5rem;
    background-color: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    border-left: 4px solid #00d4ff;
}

.note-box p {
    font-size: 15px;
    color: #bbb;
    line-height: 1.8;
    margin-bottom: 0.75rem;
}

.note-box p:last-child {
    margin-bottom: 0;
}

/* Settings Guide */
.settings-guide {
    margin-bottom: 2rem;
}

.settings-title {
    font-size: 24px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid #333;
}

.settings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.setting-item {
    background: linear-gradient(135deg, #1a1a1a 0%, #2a2a2a 100%);
    padding: 1.5rem;
    border-radius: 10px;
    border: 2px solid #6366f1;
    transition: transform 0.2s, box-shadow 0.2s;
}

.setting-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(99, 102, 241, 0.3);
}

.setting-item h4 {
    font-size: 18px;
    font-weight: 700;
    color: #6366f1;
    margin-bottom: 0.75rem;
}

.setting-item p {
    font-size: 15px;
    color: #ddd;
    line-height: 1.6;
}

.final-warning {
    text-align: center;
    font-size: 18px;
    margin-top: 2rem;
}

/* Responsive for Guide Section */
@media (max-width: 768px) {
    .guide-section {
        padding: 2rem 0;
    }

    .guide-container {
        padding: 2rem 15px;
        border-radius: 0;
        margin: 0 15px;
    }

    .guide-title {
        font-size: 20px;
        margin-bottom: 1.5rem;
        padding-left: 0.75rem;
        border-left-width: 3px;
    }

    .notice-main-title {
        font-size: 20px;
        margin-top: 2rem;
        margin-bottom: 1.5rem;
    }

    .error-guide {
        margin-bottom: 3rem;
    }

    .error-list-modern li {
        font-size: 16px;
        padding: 0.875rem 1rem;
        padding-left: 2.5rem;
    }

    .error-list-modern li:before {
        left: 0.75rem;
        font-size: 18px;
    }

    .solution-modern {
        padding: 1.5rem;
        margin-top: 1.5rem;
    }

    .solution-title {
        font-size: 18px;
        margin-bottom: 1rem;
    }

    .solution-steps li {
        font-size: 16px;
        padding: 0.875rem 1rem;
        padding-left: 2.5rem;
    }

    .solution-steps li:before {
        width: 24px;
        height: 24px;
        font-size: 12px;
        left: 0.75rem;
    }

    .solution-note {
        font-size: 14px;
        padding: 0.875rem;
        margin-top: 1rem;
    }

    .notice-guide {
        margin-bottom: 3rem;
    }

    .notice-card {
        flex-direction: column;
        gap: 1rem;
        padding: 1.5rem;
        margin-bottom: 1.5rem;
    }

    .notice-number {
        width: 40px;
        height: 40px;
        font-size: 20px;
    }

    .notice-content h4 {
        font-size: 18px;
    }

    .notice-content p {
        font-size: 15px;
    }

    .quote-modern {
        font-size: 14px;
        padding: 0.875rem;
    }

    .notice-list li {
        font-size: 15px;
        padding-left: 1.25rem;
    }

    .warning-modern {
        font-size: 14px;
        padding: 0.875rem;
    }

    .recommendation-guide {
        margin-bottom: 3rem;
    }

    .recommendation-title {
        font-size: 20px;
        margin-bottom: 1.5rem;
    }

    .recommendation-card {
        padding: 1.5rem;
    }

    .recommendation-subtitle {
        font-size: 18px;
        margin-bottom: 1rem;
    }

    .recommendation-card p {
        font-size: 15px;
    }

    .note-box {
        padding: 1rem;
        margin-top: 1.5rem;
    }

    .note-box p {
        font-size: 14px;
    }

    .settings-guide {
        margin-bottom: 1.5rem;
    }

    .settings-title {
        font-size: 20px;
        margin-bottom: 1.5rem;
    }

    .settings-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .setting-item {
        padding: 1.25rem;
    }

    .setting-item h4 {
        font-size: 16px;
    }

    .setting-item p {
        font-size: 14px;
    }

    .final-warning {
        font-size: 16px;
        margin-top: 1.5rem;
    }
}

@media (max-width: 480px) {
    .guide-section {
        padding: 1.5rem 0;
    }

    .guide-container {
        padding: 1.5rem 12px;
        margin: 0 10px;
    }

    .guide-title {
        font-size: 18px;
        margin-bottom: 1.25rem;
    }

    .notice-main-title {
        font-size: 18px;
    }

    .error-list-modern li {
        font-size: 15px;
        padding: 0.75rem 0.875rem;
        padding-left: 2.25rem;
    }

    .solution-modern {
        padding: 1.25rem;
    }

    .solution-title {
        font-size: 16px;
    }

    .solution-steps li {
        font-size: 15px;
        padding: 0.75rem 0.875rem;
        padding-left: 2.25rem;
    }

    .notice-card {
        padding: 1.25rem;
    }

    .recommendation-card {
        padding: 1.25rem;
    }

    .setting-item {
        padding: 1rem;
    }
}