:root {
    --primary-color: #2563eb;
    --secondary-color: #1e40af;
    --text-color: #1f2937;
    --light-text: #6b7280;
    --bg-color: #f3f4f6;
    --white: #ffffff;
}

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

body {
    font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--white);
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

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

/* Navbar */
.navbar {
    background: var(--white);
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
}

.nav-links {
    display: flex;
    gap: 30px;
    align-items: center;
}

.nav-links a {
    font-weight: 500;
    transition: color 0.3s;
}

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

.btn-download-nav {
    background: var(--primary-color);
    color: var(--white) !important;
    padding: 8px 20px;
    border-radius: 5px;
    transition: background 0.3s;
}

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

/* Hero Section */
.hero {
    padding-top: 140px;
    padding-bottom: 80px;
    background: linear-gradient(135deg, #f0f7ff 0%, #ffffff 100%);
}

.hero .container {
    display: flex;
    align-items: center;
    gap: 50px;
}

.hero-content {
    flex: 1;
}

.hero-content h1 {
    font-size: 3rem;
    line-height: 1.2;
    margin-bottom: 20px;
    color: #111827;
}

.hero-content p {
    font-size: 1.1rem;
    color: var(--light-text);
    margin-bottom: 30px;
}

.hero-btns {
    display: flex;
    gap: 15px;
    margin-bottom: 15px;
}

.btn-primary {
    background: var(--primary-color);
    color: var(--white);
    padding: 12px 30px;
    border-radius: 6px;
    font-size: 1.1rem;
    font-weight: bold;
    box-shadow: 0 4px 6px rgba(37, 99, 235, 0.2);
    transition: transform 0.2s;
}

.btn-primary:hover {
    transform: translateY(-2px);
    background: var(--secondary-color);
}

.btn-secondary {
    border: 2px solid #e5e7eb;
    padding: 12px 30px;
    border-radius: 6px;
    font-size: 1.1rem;
    font-weight: 500;
    transition: all 0.2s;
}

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

.hero-note {
    font-size: 0.85rem;
    color: #9ca3af;
}

.hero-image {
    flex: 1;
}

.screenshot-glow {
    width: 100%;
    border-radius: 10px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
}

/* Features */
.features {
    padding: 80px 0;
    background: var(--white);
}

.section-title {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 60px;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.feature-card {
    text-align: center;
    padding: 30px;
    border-radius: 10px;
    transition: transform 0.3s;
    background: #fff;
    border: 1px solid #f3f4f6;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.05);
}

.feature-card .icon {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.feature-card h3 {
    margin-bottom: 15px;
    font-size: 1.25rem;
}

.feature-card p {
    color: var(--light-text);
}

/* Showcase */
.showcase {
    padding: 80px 0;
    background: #f9fafb;
}

.showcase-text {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.showcase-text h2 {
    margin-bottom: 20px;
    font-size: 2rem;
}

.showcase-list {
    margin-top: 40px;
    text-align: left;
    display: inline-block;
}

.showcase-list li {
    font-size: 1.1rem;
    margin-bottom: 15px;
    color: #374151;
}

.showcase-list i {
    color: #10b981;
    margin-right: 10px;
}

/* Contact */
.contact {
    padding: 80px 0;
    background: var(--white);
}

.contact-box {
    background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
    color: var(--white);
    padding: 60px;
    border-radius: 20px;
    text-align: center;
}

.contact-box h2 {
    font-size: 2rem;
    margin-bottom: 20px;
}

.contact-box p {
    margin-bottom: 30px;
    opacity: 0.9;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.email-link {
    display: inline-block;
    background: var(--white);
    color: var(--primary-color);
    padding: 15px 40px;
    border-radius: 50px;
    font-weight: bold;
    font-size: 1.2rem;
    transition: transform 0.2s;
}

.email-link:hover {
    transform: scale(1.05);
}

/* Footer */
footer {
    padding: 30px 0;
    text-align: center;
    color: var(--light-text);
    background: #f9fafb;
    border-top: 1px solid #e5e7eb;
}

/* Responsive */
@media (max-width: 768px) {
    .hero .container {
        flex-direction: column;
        text-align: center;
    }
    
    .hero-content h1 {
        font-size: 2.2rem;
    }
    
    .hero-btns {
        justify-content: center;
    }
    
    .navbar .nav-links {
        display: none; /* Mobile menu simplification */
    }
}