/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #2563eb;
    --secondary-color: #1e40af;
    --accent-color: #3b82f6;
    --text-dark: #1f2937;
    --text-light: #6b7280;
    --bg-light: #f9fafb;
    --bg-white: #ffffff;
    --border-color: #e5e7eb;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-white);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Notice Banner */
.notice-banner {
    background: linear-gradient(135deg, #1e40af 0%, #2563eb 100%);
    color: white;
    padding: 0.75rem 0;
    text-align: center;
    font-size: 0.9rem;
    font-weight: 500;
    position: relative;
    z-index: 1001;
}

.notice-banner .container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.notice-banner strong {
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.notice-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    margin-right: 0.25rem;
}

/* Header Styles */
header {
    background-color: var(--bg-white);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 20px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
    text-decoration: none;
}

.logo img {
    height: 40px;
    width: 40px;
    object-fit: contain;
}

nav ul {
    display: flex;
    list-style: none;
    gap: 2rem;
}

nav a {
    color: var(--text-dark);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

nav a:hover {
    color: var(--primary-color);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 5rem 0;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.hero-text {
    text-align: left;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

.hero p {
    font-size: 1.25rem;
    opacity: 0.95;
}

.hero-image img {
    width: 100%;
    max-width: 500px;
    height: auto;
    filter: drop-shadow(0 10px 20px rgba(0, 0, 0, 0.2));
}

/* Page Header */
.page-header {
    background-color: var(--bg-light);
    padding: 3rem 0;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.page-header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.page-header p {
    font-size: 1.1rem;
    color: var(--text-light);
}

/* Content Sections */
.content-section {
    padding: 4rem 0;
}

.content-section h2 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    color: var(--text-dark);
}

.content-section h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    margin-top: 2rem;
    color: var(--text-dark);
}

.content-section p {
    margin-bottom: 1rem;
    color: var(--text-light);
    line-height: 1.8;
}

.content-section ul,
.content-section ol {
    margin-bottom: 1.5rem;
    margin-left: 2rem;
    color: var(--text-light);
}

.content-section li {
    margin-bottom: 0.5rem;
    line-height: 1.8;
}

/* Feature Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.feature-card {
    background-color: var(--bg-white);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    text-align: center;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.feature-icon {
    width: 100px;
    height: 100px;
    margin: 0 auto 1.5rem;
}

.feature-icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.feature-card h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    margin-top: 0;
}

/* Intro with Image */
.intro-with-image {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 3rem;
    align-items: center;
    margin-bottom: 2rem;
}

.intro-image img {
    width: 100%;
    max-width: 400px;
    height: auto;
}

/* Info Section */
.info-section {
    background-color: var(--bg-light);
    padding: 4rem 0;
}

.card-types {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.type-item {
    background-color: var(--bg-white);
    padding: 2rem;
    border-radius: 8px;
    border-left: 4px solid var(--primary-color);
}

.type-item h3 {
    margin-top: 0;
    color: var(--primary-color);
}

/* Benefits Section */
.benefits-section {
    padding: 4rem 0;
}

.benefits-list {
    list-style: none;
    margin-left: 0;
}

.benefits-list li {
    padding-left: 2rem;
    position: relative;
    margin-bottom: 1rem;
}

.benefits-list li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--success-color);
    font-weight: bold;
    font-size: 1.2rem;
}

/* Tips Section */
.tips-section {
    background-color: var(--bg-light);
    padding: 4rem 0;
}

.tips-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.tip-card {
    background-color: var(--bg-white);
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.08);
}

.tip-card h3 {
    color: var(--primary-color);
    margin-top: 0;
    margin-bottom: 1rem;
}

/* Process Steps */
.process-steps {
    margin-top: 3rem;
}

.step {
    display: flex;
    gap: 2rem;
    margin-bottom: 3rem;
    align-items: flex-start;
}

.step-number {
    background-color: var(--primary-color);
    color: white;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: bold;
    flex-shrink: 0;
}

.step-content h3 {
    margin-top: 0;
    color: var(--primary-color);
}

/* Systems Grid */
.systems-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.system-card {
    background-color: var(--bg-light);
    padding: 2rem;
    border-radius: 8px;
}

.system-card h3 {
    margin-top: 0;
    color: var(--primary-color);
}

/* Usage Guide */
.usage-guide {
    margin-top: 2rem;
}

.usage-guide h3 {
    background-color: var(--bg-light);
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
}

/* Balance Methods */
.balance-methods {
    list-style: none;
    margin-left: 0;
}

.balance-methods li {
    padding: 1rem;
    background-color: var(--bg-light);
    margin-bottom: 0.5rem;
    border-radius: 4px;
    padding-left: 2rem;
    position: relative;
}

.balance-methods li:before {
    content: "→";
    position: absolute;
    left: 0.5rem;
    color: var(--primary-color);
    font-weight: bold;
}

/* Considerations */
.considerations {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.consideration-item {
    background-color: var(--bg-light);
    padding: 1.5rem;
    border-radius: 8px;
}

.consideration-item h3 {
    margin-top: 0;
    color: var(--primary-color);
    font-size: 1.2rem;
}

/* Security Tips */
.security-tips {
    background-color: #fef3c7;
    border-left: 4px solid var(--warning-color);
    padding: 1.5rem;
    margin-top: 2rem;
    border-radius: 4px;
}

/* Values Section */
.values-section {
    margin-top: 3rem;
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.value-card {
    text-align: center;
    padding: 2rem;
    background-color: var(--bg-light);
    border-radius: 8px;
}

.value-card h3 {
    color: var(--primary-color);
    margin-top: 0;
}

/* Contact Grid */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 3rem;
    margin-top: 3rem;
}

.contact-method {
    margin-bottom: 2rem;
}

.contact-method h3 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    margin-top: 0;
}

.contact-method a {
    color: var(--primary-color);
    text-decoration: none;
}

.contact-method a:hover {
    text-decoration: underline;
}

/* Contact Form */
.contact-form {
    background-color: var(--bg-light);
    padding: 2rem;
    border-radius: 8px;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-dark);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-family: inherit;
    font-size: 1rem;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.submit-button {
    background-color: var(--primary-color);
    color: white;
    padding: 0.75rem 2rem;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.submit-button:hover {
    background-color: var(--secondary-color);
}

/* FAQ Section */
.faq-section {
    margin-top: 4rem;
    padding-top: 3rem;
    border-top: 2px solid var(--border-color);
}

.faq-item {
    margin-bottom: 2rem;
}

.faq-item h3 {
    color: var(--primary-color);
    margin-top: 0;
    margin-bottom: 0.5rem;
}

/* CTA Section */
.cta-section {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 4rem 0;
    text-align: center;
}

.cta-section h2 {
    color: white;
    margin-bottom: 1rem;
}

.cta-section p {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    color: rgba(255, 255, 255, 0.95);
}

.cta-button {
    display: inline-block;
    background-color: white;
    color: var(--primary-color);
    padding: 1rem 2.5rem;
    border-radius: 4px;
    text-decoration: none;
    font-weight: 600;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

/* Legal Content */
.legal-content h2 {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.legal-content h2:first-child {
    margin-top: 0;
    padding-top: 0;
    border-top: none;
}

.info-list {
    list-style: disc;
    color: var(--text-light);
}

/* Cookie Table */
.cookie-table {
    width: 100%;
    border-collapse: collapse;
    margin: 2rem 0;
}

.cookie-table th,
.cookie-table td {
    padding: 1rem;
    text-align: left;
    border: 1px solid var(--border-color);
}

.cookie-table th {
    background-color: var(--bg-light);
    font-weight: 600;
    color: var(--text-dark);
}

.cookie-table td {
    color: var(--text-light);
}

.cookie-types {
    margin-top: 2rem;
}

.cookie-types h3 {
    color: var(--primary-color);
    margin-top: 1.5rem;
}

/* Footer */
footer {
    background-color: var(--text-dark);
    color: white;
    padding: 3rem 0 1rem;
    margin-top: 4rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-column h4 {
    margin-bottom: 1rem;
    color: white;
}

.footer-column p {
    line-height: 1.8;
    opacity: 0.9;
    color: rgba(255, 255, 255, 0.9);
}

.footer-column ul {
    list-style: none;
    margin-left: 0;
}

.footer-column ul li {
    margin-bottom: 0.5rem;
}

.footer-column a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-column a:hover {
    color: var(--accent-color);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 1.5rem;
    text-align: center;
    opacity: 0.8;
}

/* Responsive Design */
@media (max-width: 768px) {
    .notice-banner {
        font-size: 0.8rem;
        padding: 0.6rem 0;
    }
    
    .notice-banner .container {
        flex-direction: column;
        gap: 0.25rem;
    }

    header .container {
        flex-direction: column;
        gap: 1rem;
    }

    nav ul {
        flex-direction: column;
        gap: 0.5rem;
        text-align: center;
    }

    .hero-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .hero-text {
        text-align: center;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hero-image {
        text-align: center;
    }

    .intro-with-image {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .intro-image {
        text-align: center;
    }

    .page-header h1 {
        font-size: 1.8rem;
    }

    .features-grid,
    .card-types,
    .tips-grid,
    .systems-grid,
    .considerations,
    .values-grid {
        grid-template-columns: 1fr;
    }

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

    .contact-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .hero {
        padding: 3rem 0;
    }

    .hero h1 {
        font-size: 1.5rem;
    }

    .content-section {
        padding: 2rem 0;
    }
}

/* Enhanced Content Sections */
.detailed-explanation {
    margin-top: 2.5rem;
    padding: 2rem;
    background-color: var(--bg-light);
    border-radius: 8px;
    border-left: 4px solid var(--primary-color);
}

.detailed-explanation h3 {
    color: var(--primary-color);
    margin-top: 0;
    margin-bottom: 1.5rem;
}

.detailed-explanation ul {
    margin-top: 1rem;
}

.detailed-explanation li {
    margin-bottom: 1rem;
    padding-left: 0.5rem;
}

.detailed-explanation strong {
    color: var(--text-dark);
}

.comparison-section {
    margin-top: 2.5rem;
    padding: 2rem;
    background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 100%);
    border-radius: 8px;
}

.comparison-section h3 {
    color: var(--primary-color);
    margin-top: 0;
    margin-bottom: 1rem;
}

.comparison-section ul {
    margin-top: 1rem;
}

.comparison-section li strong {
    color: var(--primary-color);
}

.practical-apps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.app-item {
    background-color: var(--bg-white);
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.08);
}

.app-item h4 {
    color: var(--primary-color);
    margin-top: 0;
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

.fraud-awareness {
    margin-top: 3rem;
    padding: 2rem;
    background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
    border-radius: 8px;
    border-left: 5px solid var(--warning-color);
}

.fraud-awareness h3 {
    color: var(--text-dark);
    margin-top: 0;
    margin-bottom: 1rem;
}

.fraud-awareness ul {
    margin-top: 1.5rem;
}

.fraud-awareness li {
    margin-bottom: 1.5rem;
    background-color: rgba(255, 255, 255, 0.7);
    padding: 1rem;
    border-radius: 4px;
}

.fraud-awareness li strong {
    color: var(--text-dark);
    display: block;
    margin-bottom: 0.5rem;
}

.reporting-section {
    margin-top: 2.5rem;
    padding: 2rem;
    background-color: #fee2e2;
    border-radius: 8px;
    border-left: 5px solid var(--error-color);
}

.reporting-section h3 {
    color: var(--error-color);
    margin-top: 0;
    margin-bottom: 1.5rem;
}

.reporting-section ol {
    margin-left: 1.5rem;
}

.reporting-section li {
    margin-bottom: 1rem;
    line-height: 1.8;
    color: var(--text-dark);
}

.card-types .type-item ul {
    margin-top: 1rem;
    margin-bottom: 1rem;
}

.card-types .type-item li {
    font-size: 0.95rem;
    line-height: 1.7;
}

.card-types .type-item strong {
    color: var(--text-dark);
    display: block;
    margin-top: 1rem;
}

@media (max-width: 768px) {
    .practical-apps {
        grid-template-columns: 1fr;
    }
    
    .detailed-explanation,
    .comparison-section,
    .fraud-awareness,
    .reporting-section {
        padding: 1.5rem;
    }
}