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

:root {
    --primary-color: #FF6B81;
    --primary-light: #FF8FA3;
    --primary-dark: #E55569;
    --secondary-color: #FFE6EA;
    --accent-color: #FFD93D;
    --bg-gradient-start: #FF6B81;
    --bg-gradient-end: #FF9FAB;
    --text-primary: #2D3436;
    --text-secondary: #636E72;
    --white: #FFFFFF;
    --shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 20px 60px rgba(0, 0, 0, 0.15);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', -apple-system, BlinkMacSystemFont, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    overflow-x: hidden;
}

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.navbar.scrolled {
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: var(--primary-color);
    font-weight: 700;
    font-size: 1.5rem;
}

.nav-logo img {
    width: 40px;
    height: 40px;
    margin-right: 10px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
}

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

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

.nav-download {
    background: linear-gradient(135deg, var(--bg-gradient-start), var(--bg-gradient-end));
    color: var(--white);
    padding: 12px 24px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.nav-download:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(255, 107, 129, 0.4);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
}

.mobile-menu-btn span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    margin: 4px 0;
    transition: all 0.3s ease;
}

.hero {
    min-height: 100vh;
    background: linear-gradient(135deg, var(--bg-gradient-start) 0%, var(--bg-gradient-end) 100%);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 100px 20px 50px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 60%);
    animation: pulse 8s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 0.5; }
    50% { transform: scale(1.1); opacity: 0.8; }
}

.hero-container {
    max-width: 1200px;
    width: 100%;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-content h1 {
    font-size: 4rem;
    font-weight: 800;
    color: var(--white);
    margin-bottom: 10px;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.hero-content h2 {
    font-size: 1.8rem;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 20px;
}

.hero-content p {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 30px;
    line-height: 1.8;
}

.hero-stats {
    display: flex;
    gap: 30px;
    margin-bottom: 30px;
}

.hero-stats span {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    padding: 10px 20px;
    border-radius: 20px;
    color: var(--white);
    font-size: 0.9rem;
}

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

.download-btn, .learn-more-btn {
    padding: 16px 40px;
    border-radius: 30px;
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    transition: all 0.3s ease;
}

.download-btn {
    background: var(--white);
    color: var(--primary-color);
    box-shadow: var(--shadow);
}

.download-btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
}

.learn-more-btn {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    color: var(--white);
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.learn-more-btn:hover {
    background: rgba(255, 255, 255, 0.25);
    border-color: rgba(255, 255, 255, 0.5);
}

.hero-screenshots {
    display: flex;
    justify-content: center;
    align-items: center;
}

.screenshot-wrapper {
    position: relative;
    width: 100%;
    max-width: 500px;
    height: 500px;
}

.screenshot-item {
    position: absolute;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.screenshot-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.screenshot-1 {
    width: 280px;
    height: 480px;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    z-index: 2;
}

.screenshot-2 {
    width: 260px;
    height: 450px;
    left: 10%;
    top: 30%;
    transform: rotate(-8deg);
    z-index: 1;
}

.screenshot-3 {
    width: 260px;
    height: 450px;
    right: 10%;
    top: 30%;
    transform: rotate(8deg);
    z-index: 1;
}

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
}

.scroll-indicator a {
    display: block;
    width: 30px;
    height: 50px;
    border: 2px solid rgba(255, 255, 255, 0.5);
    border-radius: 25px;
    position: relative;
}

.scroll-indicator span {
    position: absolute;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    width: 6px;
    height: 12px;
    background: rgba(255, 255, 255, 0.8);
    border-radius: 3px;
    animation: scroll 2s ease-in-out infinite;
}

@keyframes scroll {
    0% { top: 10px; opacity: 1; }
    50% { top: 25px; opacity: 0.5; }
    100% { top: 10px; opacity: 1; }
}

.features {
    padding: 100px 20px;
    background: #F8F9FA;
}

.features-container {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
}

.features-container h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.features-container p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 60px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.feature-card {
    background: var(--white);
    padding: 40px 30px;
    border-radius: 20px;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    text-align: left;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 15px;
}

.feature-card p {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.reviews {
    padding: 100px 20px;
    background: var(--white);
}

.reviews-container {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
}

.reviews-container h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 60px;
}

.reviews-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.review-card {
    background: #F8F9FA;
    padding: 30px;
    border-radius: 20px;
    transition: all 0.3s ease;
    text-align: left;
}

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

.review-rating {
    color: var(--secondary-color);
    font-size: 1.2rem;
    margin-bottom: 15px;
}

.review-card p {
    font-size: 1rem;
    color: var(--text-primary);
    line-height: 1.7;
    margin-bottom: 20px;
    font-style: italic;
}

.review-author {
    display: flex;
    align-items: center;
    gap: 15px;
}

.author-avatar {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-light), var(--primary-color));
}

.review-author span {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
}

.faq {
    padding: 100px 20px;
    background: linear-gradient(135deg, #FF6B81 0%, #FF9FAB 100%);
}

.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-container h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--white);
    text-align: center;
    margin-bottom: 60px;
}

.faq-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.faq-item {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    overflow: hidden;
}

.faq-question {
    width: 100%;
    padding: 20px 25px;
    background: none;
    border: none;
    color: var(--white);
    font-size: 1.1rem;
    font-weight: 600;
    text-align: left;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background 0.3s ease;
}

.faq-question:hover {
    background: rgba(255, 255, 255, 0.15);
}

.faq-question::after {
    content: '+';
    font-size: 1.5rem;
    transition: transform 0.3s ease;
}

.faq-question.active::after {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-answer p {
    padding: 0 25px 20px;
    color: rgba(255, 255, 255, 0.85);
    line-height: 1.8;
}

.download-section {
    padding: 100px 20px;
    background: var(--white);
    text-align: center;
}

.download-container h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 15px;
}

.download-container p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
}

.main-download-btn {
    display: inline-block;
    background: linear-gradient(135deg, var(--bg-gradient-start), var(--bg-gradient-end));
    color: var(--white);
    padding: 20px 60px;
    border-radius: 40px;
    font-size: 1.3rem;
    font-weight: 700;
    text-decoration: none;
    box-shadow: 0 10px 40px rgba(255, 107, 129, 0.4);
    transition: all 0.3s ease;
}

.main-download-btn:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 60px rgba(255, 107, 129, 0.5);
}

.download-info {
    margin-top: 30px;
    display: flex;
    justify-content: center;
    gap: 30px;
}

.download-info span {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.footer {
    background: var(--text-primary);
    padding: 40px 20px;
    color: var(--white);
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.footer-logo {
    display: flex;
    align-items: center;
    font-weight: 700;
    font-size: 1.3rem;
}

.footer-logo img {
    width: 35px;
    height: 35px;
    margin-right: 10px;
}

.footer-links {
    display: flex;
    gap: 30px;
}

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

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

.footer-copyright {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.9rem;
}

@media (max-width: 900px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 40px;
    }
    
    .hero-content h1 {
        font-size: 3rem;
    }
    
    .hero-content h2 {
        font-size: 1.5rem;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .screenshot-wrapper {
        height: 400px;
    }
    
    .screenshot-1 {
        width: 220px;
        height: 380px;
    }
    
    .screenshot-2, .screenshot-3 {
        width: 200px;
        height: 350px;
    }
}

@media (max-width: 600px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 20px;
        box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .nav-download {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .hero-content h1 {
        font-size: 2.5rem;
    }
    
    .hero-content h2 {
        font-size: 1.3rem;
    }
    
    .hero-content p {
        font-size: 1rem;
    }
    
    .download-btn, .learn-more-btn {
        padding: 14px 30px;
        font-size: 0.9rem;
    }
    
    .screenshot-wrapper {
        height: 350px;
    }
    
    .screenshot-1 {
        width: 180px;
        height: 320px;
    }
    
    .screenshot-2, .screenshot-3 {
        display: none;
    }
    
    .features-container h2,
    .reviews-container h2,
    .faq-container h2,
    .download-container h2 {
        font-size: 2rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .download-info {
        flex-direction: column;
        gap: 10px;
    }
}