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

:root {
    --primary-color: #00E6CC;
    --primary-dark: #00BFA6;
    --secondary-color: #E0FFFF;
    --text-dark: #1a1a1a;
    --text-gray: #666;
    --bg-light: #f8fffe;
    --bg-gradient-start: #E0FFFF;
    --bg-gradient-end: #E0FFE0;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 15px 40px rgba(0, 0, 0, 0.15);
}

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

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

/* Navigation */
.navbar {
    background: white;
    padding: 20px 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 24px;
    font-weight: 700;
    color: var(--text-dark);
    text-decoration: none;
    transition: opacity 0.3s;
}

.nav-brand:hover {
    opacity: 0.8;
}

.logo {
    width: 64px;
    height: 64px;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 40px;
}

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

.nav-links a:hover,
.nav-links a.active {
    color: var(--primary-color);
}

/* Burger Menu */
.burger-menu {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    z-index: 1001;
}

.burger-menu span {
    width: 25px;
    height: 3px;
    background: var(--text-dark);
    transition: all 0.3s;
    border-radius: 2px;
}

.burger-menu.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.burger-menu.active span:nth-child(2) {
    opacity: 0;
}

.burger-menu.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--bg-gradient-start) 0%, var(--bg-gradient-end) 100%);
    padding: 100px 0;
    min-height: 600px;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-title {
    font-size: 56px;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
    color: var(--text-dark);
}

.hero-subtitle {
    font-size: 20px;
    color: var(--text-gray);
    margin-bottom: 40px;
    line-height: 1.6;
}

.cta-buttons {
    display: flex;
    gap: 20px;
}

.btn {
    padding: 16px 32px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    transition: all 0.3s;
    display: inline-block;
}

.btn-primary {
    background: var(--primary-color);
    color: var(--text-dark);
    box-shadow: var(--shadow);
}

.btn-primary:hover {
    background: var(--primary-dark);
    box-shadow: var(--shadow-hover);
    transform: translateY(-2px);
}

.btn-secondary {
    background: white;
    color: var(--text-dark);
    border: 2px solid var(--primary-color);
}

.btn-secondary:hover {
    background: var(--primary-color);
}

/* Phone Mockup */
.phone-mockup {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    width: 300px;
    height: 600px;
    border-radius: 40px;
    padding: 12px;
    box-shadow: var(--shadow-hover);
    margin: 0 auto;
    position: relative;
}

.mockup-screen {
    width: 100%;
    height: 100%;
    border-radius: 32px;
    object-fit: cover;
    display: block;
}

/* Sections */
.section {
    padding: 100px 0;
}

.section-alt {
    background: linear-gradient(135deg, var(--bg-gradient-start) 0%, var(--bg-gradient-end) 100%);
}

.section-header {
    text-align: center;
    margin-bottom: 80px;
}

.section-header h2 {
    font-size: 48px;
    font-weight: 800;
    margin-bottom: 16px;
    color: var(--text-dark);
}

.section-subtitle {
    font-size: 20px;
    color: var(--text-gray);
}

/* Problem Grid */
.problem-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.problem-card {
    background: white;
    padding: 40px;
    border-radius: 20px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: transform 0.3s;
}

.problem-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.problem-icon {
    font-size: 64px;
    margin-bottom: 20px;
}

.problem-card h3 {
    font-size: 24px;
    margin-bottom: 16px;
    color: var(--text-dark);
}

.problem-card p {
    color: var(--text-gray);
    line-height: 1.6;
}

/* Features Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.feature-card {
    background: white;
    padding: 40px;
    border-radius: 20px;
    box-shadow: var(--shadow);
    transition: all 0.3s;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.feature-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 22px;
    margin-bottom: 12px;
    color: var(--text-dark);
}

.feature-card p {
    color: var(--text-gray);
    line-height: 1.6;
}

/* Steps */
.steps-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    max-width: 1000px;
    margin: 0 auto;
}

.step {
    flex: 1;
    text-align: center;
    background: white;
    padding: 40px 30px;
    border-radius: 20px;
    box-shadow: var(--shadow);
}

.step-number {
    width: 60px;
    height: 60px;
    background: var(--primary-color);
    color: var(--text-dark);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    font-weight: 800;
    margin: 0 auto 20px;
}

.step h3 {
    font-size: 22px;
    margin-bottom: 12px;
    color: var(--text-dark);
}

.step p {
    color: var(--text-gray);
}

.step-arrow {
    font-size: 32px;
    color: var(--primary-color);
    font-weight: 700;
}

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

.cta-content h2 {
    font-size: 42px;
    font-weight: 800;
    margin-bottom: 16px;
    color: var(--text-dark);
}

.cta-content p {
    font-size: 20px;
    margin-bottom: 40px;
    color: var(--text-dark);
}

/* Download Buttons */
.download-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
}

.download-btn {
    display: flex;
    align-items: center;
    gap: 12px;
    background: var(--text-dark);
    color: white;
    padding: 12px 24px;
    border-radius: 12px;
    text-decoration: none;
    transition: all 0.3s;
}

.download-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.download-btn img {
    width: 32px;
    height: 32px;
}

.download-label {
    font-size: 12px;
    text-align: left;
}

.download-store {
    font-size: 20px;
    font-weight: 700;
    text-align: left;
}

/* Footer */
.footer {
    background: var(--text-dark);
    color: white;
    padding: 60px 0 30px;
}

.footer-content {
    text-align: center;
}

.footer-brand {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 30px;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin-bottom: 30px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color 0.3s;
}

.footer-links a:hover {
    color: var(--primary-color);
}

.footer-copyright {
    color: rgba(255, 255, 255, 0.5);
    font-size: 14px;
}

/* Page Header */
.page-header {
    background: linear-gradient(135deg, var(--bg-gradient-start) 0%, var(--bg-gradient-end) 100%);
    padding: 80px 0 60px;
    text-align: center;
}

.page-header h1 {
    font-size: 48px;
    font-weight: 800;
    margin-bottom: 16px;
    color: var(--text-dark);
}

.page-header p {
    font-size: 20px;
    color: var(--text-gray);
}

.update-date {
    font-size: 16px;
    color: var(--text-gray);
    font-style: italic;
}

/* Support Page */
.support-content {
    max-width: 900px;
    margin: 0 auto;
}

.faq-section,
.contact-section,
.tips-section {
    margin-bottom: 60px;
}

.faq-section h2,
.contact-section h2,
.tips-section h2 {
    font-size: 32px;
    margin-bottom: 30px;
    color: var(--text-dark);
}

.faq-item {
    background: white;
    padding: 30px;
    border-radius: 16px;
    margin-bottom: 20px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
}

.faq-item h3 {
    font-size: 20px;
    margin-bottom: 12px;
    color: var(--text-dark);
}

.faq-item p {
    color: var(--text-gray);
    line-height: 1.6;
}

.contact-card {
    background: white;
    padding: 40px;
    border-radius: 20px;
    margin-bottom: 30px;
    text-align: center;
    box-shadow: var(--shadow);
}

.contact-icon {
    font-size: 64px;
    margin-bottom: 20px;
}

.contact-card h3 {
    font-size: 24px;
    margin-bottom: 12px;
    color: var(--text-dark);
}

.contact-card p {
    color: var(--text-gray);
    margin-bottom: 20px;
}

.contact-card .btn {
    margin-top: 10px;
}

.tips-list {
    background: white;
    padding: 40px;
    border-radius: 20px;
    box-shadow: var(--shadow);
    list-style: none;
}

.tips-list li {
    padding: 16px 0;
    border-bottom: 1px solid #eee;
    color: var(--text-gray);
    line-height: 1.6;
}

.tips-list li:last-child {
    border-bottom: none;
}

.tips-list strong {
    color: var(--text-dark);
}

/* Privacy Page */
.privacy-content {
    max-width: 900px;
    margin: 0 auto;
}

.privacy-intro {
    background: var(--primary-color);
    padding: 30px;
    border-radius: 20px;
    margin-bottom: 40px;
    font-size: 18px;
    font-weight: 500;
    color: var(--text-dark);
}

.privacy-section {
    background: white;
    padding: 40px;
    border-radius: 20px;
    margin-bottom: 30px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
}

.privacy-section h2 {
    font-size: 28px;
    margin-bottom: 20px;
    color: var(--text-dark);
}

.privacy-section h3 {
    font-size: 22px;
    margin-bottom: 16px;
    color: var(--text-dark);
}

.privacy-section p {
    color: var(--text-gray);
    line-height: 1.8;
    margin-bottom: 16px;
}

.privacy-section ul,
.privacy-section ol {
    margin-left: 30px;
    margin-bottom: 16px;
}

.privacy-section li {
    color: var(--text-gray);
    line-height: 1.8;
    margin-bottom: 8px;
}

.privacy-section strong {
    color: var(--text-dark);
}

.privacy-highlight {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    padding: 40px;
    border-radius: 20px;
    text-align: center;
    box-shadow: var(--shadow);
}

.privacy-highlight h3 {
    font-size: 28px;
    margin-bottom: 16px;
    color: var(--text-dark);
}

.privacy-highlight p {
    font-size: 18px;
    color: var(--text-dark);
    line-height: 1.8;
}

.contact-info {
    background: var(--bg-light);
    padding: 20px;
    border-radius: 12px;
    margin-top: 20px;
}

.contact-info p {
    margin-bottom: 8px;
}

.contact-info a {
    color: var(--primary-dark);
    text-decoration: none;
    font-weight: 600;
}

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

/* Responsive Design */


@media (max-width: 640px) {
    .hero-title {
        font-size: 32px;
    }

    .hero-subtitle {
        font-size: 18px;
    }

    .section-header h2 {
        font-size: 36px;
    }

    .cta-buttons {
        flex-direction: column;
    }

    .btn {
        width: 100%;
        text-align: center;
    }

    .phone-mockup {
        width: 250px;
        height: 500px;
    }

    .download-buttons {
        flex-direction: column;
    }
}

@media (max-width: 968px) {
    .burger-menu {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: 72px;
        right: -100%;
        width: 250px;
        background: white;
        flex-direction: column;
        gap: 0;
        padding: 20px 0;
        box-shadow: -2px 0 10px rgba(0, 0, 0, 0.1);
        transition: right 0.3s ease;
        height: calc(100vh - 72px);
        z-index: 1000;
    }

    .nav-links.active {
        right: 0;
    }

    .nav-links li {
        width: 100%;
    }

    .nav-links a {
        display: block;
        padding: 15px 30px;
        width: 100%;
        transition: background 0.3s;
    }

    .nav-links a:hover,
    .nav-links a.active {
        background: var(--bg-light);
        color: var(--primary-color);
    }

    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-title {
        font-size: 42px;
    }

    .cta-buttons {
        justify-content: center;
    }

    .problem-grid,
    .features-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .steps-container {
        flex-direction: column;
    }

    .step-arrow {
        transform: rotate(90deg);
    }
}