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

:root {
    --primary-color: #FF6B35;
    --primary-light: #FF8C5A;
    --primary-dark: #E55A2B;
    --secondary-color: #8BC34A;
    --secondary-light: #AED581;
    --accent-color: #FFD54F;
    --bg-gradient-start: #FF9800;
    --bg-gradient-end: #FF5722;
    --text-primary: #333333;
    --text-secondary: #666666;
    --text-light: #999999;
    --bg-white: #FFFFFF;
    --bg-gray: #F5F5F5;
    --bg-dark: #1a1a1a;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.2);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-full: 50px;
}

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

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

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

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-md);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 60px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-img {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
}

.logo-text {
    font-size: 20px;
    font-weight: bold;
    color: var(--primary-color);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 30px;
    align-items: center;
}

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

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

.nav-download {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white !important;
    padding: 8px 20px;
    border-radius: var(--radius-full);
    transition: all 0.3s ease;
}

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

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.mobile-menu-btn span {
    width: 25px;
    height: 3px;
    background: var(--primary-color);
    border-radius: 2px;
    transition: all 0.3s ease;
}

.mobile-menu-btn.active span:nth-child(1) {
    transform: rotate(45deg) translateY(8px);
}

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

.mobile-menu-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translateY(-8px);
}

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

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: rgba(255, 213, 79, 0.15);
    border-radius: 50%;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 600px;
    height: 600px;
    background: rgba(139, 195, 74, 0.1);
    border-radius: 50%;
}

.hero-content {
    text-align: center;
    position: relative;
    z-index: 1;
    color: white;
}

.hero-logo {
    margin-bottom: 20px;
}

.hero-logo-img {
    width: 120px;
    height: 120px;
    border-radius: 24px;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    border: 4px solid rgba(255, 255, 255, 0.3);
}

.hero h1 {
    font-size: 56px;
    font-weight: bold;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
}

.hero-subtitle {
    font-size: 24px;
    font-weight: 500;
    margin-bottom: 15px;
    opacity: 0.95;
}

.hero-desc {
    font-size: 16px;
    max-width: 600px;
    margin: 0 auto 30px;
    opacity: 0.9;
    line-height: 1.8;
}

.version-info {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-bottom: 35px;
    font-size: 14px;
    opacity: 0.85;
}

.version-info span {
    background: rgba(255, 255, 255, 0.2);
    padding: 8px 20px;
    border-radius: var(--radius-full);
}

.hero-download-btn {
    display: inline-block;
    background: white;
    color: var(--primary-color);
    font-size: 18px;
    font-weight: bold;
    padding: 15px 50px;
    border-radius: var(--radius-full);
    text-decoration: none;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-lg);
}

.hero-download-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.intro {
    padding: 80px 0;
    background: var(--bg-white);
}

.intro h2 {
    text-align: center;
    font-size: 32px;
    font-weight: bold;
    color: var(--text-primary);
    margin-bottom: 30px;
}

.intro p {
    text-align: center;
    font-size: 16px;
    color: var(--text-secondary);
    max-width: 800px;
    margin: 0 auto 20px;
    line-height: 1.8;
}

.intro .stats {
    display: flex;
    justify-content: center;
    gap: 80px;
    margin-top: 50px;
}

.stat-item {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 40px;
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 5px;
}

.stat-label {
    font-size: 14px;
    color: var(--text-light);
}

.features {
    padding: 80px 0;
    background: var(--bg-gray);
}

.features h2 {
    text-align: center;
    font-size: 32px;
    font-weight: bold;
    color: var(--text-primary);
    margin-bottom: 50px;
}

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

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

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

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

.feature-card h3 {
    font-size: 20px;
    font-weight: bold;
    color: var(--text-primary);
    margin-bottom: 15px;
}

.feature-card p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
}

.reviews {
    padding: 80px 0;
    background: var(--bg-white);
}

.reviews h2 {
    text-align: center;
    font-size: 32px;
    font-weight: bold;
    color: var(--text-primary);
    margin-bottom: 50px;
}

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

.review-card {
    background: var(--bg-gray);
    padding: 30px;
    border-radius: var(--radius-lg);
    transition: all 0.3s ease;
}

.review-card:hover {
    background: var(--primary-color);
    color: white;
}

.review-card:hover p {
    color: rgba(255, 255, 255, 0.85);
}

.review-header {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
}

.reviewer-avatar {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
    font-size: 18px;
}

.review-card:hover .reviewer-avatar {
    background: rgba(255, 255, 255, 0.3);
}

.reviewer-name {
    font-weight: bold;
    color: var(--text-primary);
    display: block;
}

.review-card:hover .reviewer-name {
    color: white;
}

.review-rating {
    font-size: 12px;
    color: var(--accent-color);
}

.review-content {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
}

.download-section {
    padding: 100px 0;
    background: linear-gradient(135deg, var(--bg-gradient-start) 0%, var(--bg-gradient-end) 100%);
    text-align: center;
    color: white;
    position: relative;
    overflow: hidden;
}

.download-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.download-section .container {
    position: relative;
    z-index: 1;
}

.download-section h2 {
    font-size: 36px;
    font-weight: bold;
    margin-bottom: 15px;
}

.download-desc {
    font-size: 16px;
    opacity: 0.9;
    margin-bottom: 25px;
}

.version-badge {
    display: inline-flex;
    align-items: center;
    gap: 15px;
    background: rgba(255, 255, 255, 0.2);
    padding: 10px 30px;
    border-radius: var(--radius-full);
    margin-bottom: 40px;
    font-size: 14px;
}

.version-badge span {
    display: inline-block;
}

.badge-version {
    background: var(--accent-color);
    color: var(--primary-dark);
    padding: 3px 12px;
    border-radius: var(--radius-full);
    font-weight: bold;
}

.badge-date {
    opacity: 0.85;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    background: white;
    color: var(--primary-color);
    font-size: 22px;
    font-weight: bold;
    padding: 20px 60px;
    border-radius: var(--radius-full);
    text-decoration: none;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-lg);
}

.download-btn:hover {
    transform: translateY(-4px) scale(1.02);
    box-shadow: 0 15px 50px rgba(0, 0, 0, 0.35);
}

.download-icon {
    font-size: 28px;
}

.download-text {
    letter-spacing: 1px;
}

.download-note {
    font-size: 14px;
    opacity: 0.8;
    margin-top: 20px;
}

.footer {
    padding: 40px 0;
    background: var(--bg-dark);
    text-align: center;
    color: rgba(255, 255, 255, 0.6);
}

.footer-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-bottom: 15px;
}

.footer-logo-img {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
}

.footer-logo span {
    color: white;
    font-weight: bold;
    font-size: 18px;
}

.footer-copyright {
    font-size: 13px;
}

@media (max-width: 768px) {
    .nav-links {
        position: absolute;
        top: 60px;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 20px;
        gap: 15px;
        box-shadow: var(--shadow-md);
        transform: translateY(-150%);
        opacity: 0;
        transition: all 0.3s ease;
    }

    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .hero h1 {
        font-size: 40px;
    }

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

    .hero-desc {
        font-size: 14px;
        padding: 0 20px;
    }

    .version-info {
        flex-direction: column;
        gap: 10px;
    }

    .intro .stats {
        flex-direction: column;
        gap: 30px;
    }

    .stat-number {
        font-size: 32px;
    }

    .download-btn {
        font-size: 18px;
        padding: 16px 40px;
    }

    .version-badge {
        flex-direction: column;
        gap: 8px;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 32px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .hero-logo-img {
        width: 90px;
        height: 90px;
    }

    .hero-download-btn {
        font-size: 16px;
        padding: 12px 35px;
    }

    .intro h2,
    .features h2,
    .reviews h2 {
        font-size: 24px;
    }

    .download-section h2 {
        font-size: 28px;
    }

    .download-btn {
        font-size: 16px;
        padding: 14px 30px;
    }
}