:root {
    --bg-primary: #0B0F19;
    --bg-secondary: #111827;
    --text-primary: #F9FAFB;
    --text-secondary: #9CA3AF;
    --accent-color: #3B82F6;
    --accent-hover: #2563EB;
    --accent-gradient: linear-gradient(135deg, #3B82F6 0%, #8B5CF6 100%);
    --card-border: rgba(255, 255, 255, 0.05);
    --nav-height: 80px;
}

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

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

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

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

/* Navbar */
.navbar {
    height: var(--nav-height);
    background: rgba(11, 15, 25, 0.8);
    backdrop-filter: blur(10px);
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    border-bottom: 1px solid var(--card-border);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

.logo {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo i {
    color: var(--accent-color);
}

.nav-links {
    display: flex;
    gap: 40px;
}

.nav-links a {
    color: var(--text-secondary);
    font-weight: 500;
}

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

.auth-buttons {
    display: flex;
    gap: 15px;
}

.btn {
    padding: 10px 24px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-block;
}

.btn-lg {
    padding: 14px 32px;
    font-size: 18px;
}

.btn-outline {
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--text-primary);
}

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

.btn-primary {
    background: var(--accent-color);
    color: white;
    border: none;
}

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.4);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: white;
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
}

.mobile-menu-btn {
    display: none;
    font-size: 24px;
    cursor: pointer;
}

/* Hero Section */
.hero {
    padding-top: 180px;
    padding-bottom: 120px;
    position: relative;
    overflow: hidden;
}

.hero-content {
    position: relative;
    z-index: 10;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: 64px;
    line-height: 1.1;
    margin-bottom: 24px;
    letter-spacing: -1px;
}

.gradient-text {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 60px;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 60px;
    padding-top: 40px;
    border-top: 1px solid var(--card-border);
}

.stat-item {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-primary);
}

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

/* Background Shapes */
.hero-bg-shape {
    position: absolute;
    top: -20%;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.15) 0%, rgba(11, 15, 25, 0) 70%);
    z-index: 0;
    pointer-events: none;
}

/* Features Section */
.features {
    padding: 100px 0;
    background: var(--bg-secondary);
}

.section-title {
    text-align: center;
    font-size: 36px;
    margin-bottom: 60px;
}

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

.feature-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--card-border);
    padding: 40px 30px;
    border-radius: 16px;
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(59, 130, 246, 0.3);
}

.icon-box {
    width: 60px;
    height: 60px;
    background: rgba(59, 130, 246, 0.1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: var(--accent-color);
    margin-bottom: 20px;
}

.feature-card h3 {
    margin-bottom: 15px;
    font-size: 20px;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 15px;
}

/* CTA Section */
.cta-section {
    padding: 100px 0;
}

.cta-box {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(139, 92, 246, 0.1));
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-radius: 24px;
    padding: 80px 20px;
    text-align: center;
}

.cta-box h2 {
    font-size: 36px;
    margin-bottom: 20px;
}

.cta-box p {
    color: var(--text-secondary);
    margin-bottom: 40px;
    font-size: 18px;
}

/* Footer */
.footer {
    background: var(--bg-secondary);
    padding: 80px 0 30px;
    border-top: 1px solid var(--card-border);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 60px;
}

.footer-col h4 {
    margin-bottom: 20px;
    font-size: 18px;
}

.footer-col p {
    color: var(--text-secondary);
    max-width: 300px;
}

.footer-col a {
    display: block;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

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

.social-links {
    display: flex;
    gap: 20px;
}

.social-links a {
    font-size: 20px;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid var(--card-border);
    color: var(--text-secondary);
    font-size: 14px;
}

/* Business Section Styles */
.business-hero {
    background: linear-gradient(135deg, var(--accent-color) 0%, #1e40af 100%);
    border-radius: 16px;
    padding: 60px 40px;
    color: white;
    text-align: center;
    margin-bottom: 40px;
    box-shadow: 0 10px 30px rgba(59, 130, 246, 0.2);
    position: relative;
    overflow: hidden;
}

.business-hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    opacity: 0.1;
    background-image: radial-gradient(circle at 20% 30%, white 0%, transparent 10%), 
                      radial-gradient(circle at 80% 70%, white 0%, transparent 10%);
    background-size: 100px 100px;
}

.business-hero-content {
    position: relative;
    z-index: 1;
}

.business-hero-btn {
    display: inline-block;
    background: white;
    color: var(--accent-color);
    padding: 12px 36px;
    border-radius: 30px;
    font-weight: 600;
    font-size: 16px;
    margin-top: 30px;
    cursor: pointer;
    transition: all 0.3s;
}

.business-hero-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0,0,0,0.15);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-bottom: 50px;
}

.stat-card {
    background: rgba(255, 255, 255, 0.03);
    padding: 24px;
    border-radius: 12px;
    text-align: center;
    border: 1px solid var(--card-border);
    transition: transform 0.3s;
}

.stat-card:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.05);
}

.stat-value {
    font-size: 32px;
    font-weight: 700;
    color: var(--accent-color);
    margin-bottom: 8px;
}

.coop-section {
    background: rgba(255, 255, 255, 0.03);
    border-radius: 16px;
    padding: 40px;
    border: 1px solid var(--card-border);
    margin-bottom: 50px;
}

.coop-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.coop-item {
    display: flex;
    align-items: flex-start;
}

.coop-number {
    font-size: 48px;
    font-weight: 900;
    color: rgba(59, 130, 246, 0.2);
    line-height: 1;
    margin-right: 15px;
}

.contact-grid {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin-top: 30px;
}

.contact-item {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.contact-icon {
    font-size: 24px;
    margin-bottom: 10px;
    color: var(--accent-color);
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .hero-title {
        font-size: 42px;
    }
    
    .nav-links, .auth-buttons {
        display: none;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 30px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-col p {
        margin: 0 auto;
    }
    
    .social-links {
        justify-content: center;
    }
    
    /* Business Section Mobile */
    .stats-grid, .coop-list {
        grid-template-columns: 1fr;
    }
    .contact-grid {
        flex-direction: column;
        gap: 20px;
    }
}

/* Business Section Specific Overrides */
.business-hero .hero-title {
    font-size: 32px;
    margin-bottom: 16px;
    line-height: 1.3;
}

.business-hero .hero-subtitle {
    font-size: 16px;
    margin-bottom: 30px;
    opacity: 0.9;
}