:root {
    --primary-color: #3c9cff;
    --secondary-color: #2b85e4;
    --text-color: #333;
    --light-text: #666;
    --bg-light: #f8f9fa;
    --white: #ffffff;
}

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

body {
    font-family: 'PingFang SC', 'Helvetica Neue', Arial, 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-color: var(--white);
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

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

.logo {
    display: flex;
    align-items: center;
    font-size: 20px;
    font-weight: bold;
    color: var(--primary-color);
}

.logo i {
    margin-right: 10px;
    font-size: 24px;
}

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

.nav-links li {
    margin-left: 30px;
}

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

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

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

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

/* Hero Section */
.hero {
    padding-top: 120px;
    padding-bottom: 80px;
    background: linear-gradient(135deg, #f0f7ff 0%, #ffffff 100%);
}

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

.hero-text {
    flex: 1;
    padding-right: 50px;
}

.hero-text h1 {
    font-size: 48px;
    line-height: 1.2;
    margin-bottom: 20px;
    color: #2c3e50;
}

.hero-text p {
    font-size: 18px;
    color: var(--light-text);
    margin-bottom: 30px;
}

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

.btn {
    padding: 12px 30px;
    border-radius: 5px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

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

.btn-primary:hover {
    background-color: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(60, 156, 255, 0.3);
}

.btn-outline {
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    background: transparent;
}

.btn-outline:hover {
    background-color: #e6f1ff;
}

.hero-image {
    flex: 1;
    display: flex;
    justify-content: center;
}

/* Mockup */
.mockup {
    width: 300px;
    height: 600px;
    background-color: #333;
    border-radius: 40px;
    padding: 15px;
    box-shadow: 0 20px 50px rgba(0,0,0,0.2);
    position: relative;
}

.screen {
    width: 100%;
    height: 100%;
    background-color: #f5f7fa;
    border-radius: 30px;
    overflow: hidden;
    position: relative;
    display: flex;
    flex-direction: column;
}

.app-header {
    background-color: var(--primary-color);
    color: white;
    padding: 40px 20px 20px;
    font-size: 18px;
    font-weight: bold;
}

.app-card {
    background: white;
    margin: 15px;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.app-card span {
    font-weight: bold;
    color: #333;
}

.app-card small {
    color: #ff9900;
}

.app-stats {
    display: flex;
    margin: 0 15px;
    gap: 15px;
}

.app-stats .stat {
    flex: 1;
    background: white;
    padding: 20px;
    border-radius: 10px;
    text-align: center;
    display: flex;
    flex-direction: column;
}

.stat span {
    font-size: 24px;
    font-weight: bold;
    color: var(--primary-color);
}

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

.section-title {
    text-align: center;
    font-size: 32px;
    margin-bottom: 50px;
    color: #2c3e50;
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background-color: var(--primary-color);
    margin: 15px auto 0;
}

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

.feature-card {
    background-color: var(--white);
    padding: 30px;
    border-radius: 10px;
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
    border: 1px solid #eee;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.08);
}

.icon-box {
    width: 70px;
    height: 70px;
    background-color: #e6f1ff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    color: var(--primary-color);
    font-size: 28px;
}

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

.feature-card p {
    color: var(--light-text);
    font-size: 14px;
}

/* Scenario */
.scenario {
    padding: 80px 0;
    background-color: var(--bg-light);
}

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

.scenario-item {
    background: white;
    padding: 30px;
    border-radius: 10px;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    transition: all 0.3s;
}

.scenario-item:hover {
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.scenario-item i {
    font-size: 40px;
    color: var(--secondary-color);
    margin-bottom: 15px;
}

.scenario-item span {
    font-weight: bold;
    color: #555;
}

/* Footer */
footer {
    background-color: #2c3e50;
    color: white;
    padding: 60px 0 20px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 40px;
}

.footer-left h3 {
    font-size: 24px;
    margin-bottom: 10px;
}

.qrcode-box {
    text-align: center;
}

.qrcode-placeholder {
    width: 120px;
    height: 120px;
    background-color: white;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #2c3e50;
    font-size: 40px;
    border-radius: 5px;
}

.copyright {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255,255,255,0.1);
    font-size: 14px;
    color: #aaa;
}

/* Responsive */
@media (max-width: 768px) {
    .navbar .container {
        padding: 0 15px;
    }
    
    .nav-links {
        display: none; /* Mobile menu hidden for simplicity */
    }
    
    .hero-content {
        flex-direction: column;
        text-align: center;
    }
    
    .hero-text {
        padding-right: 0;
        margin-bottom: 50px;
    }
    
    .hero-btns {
        justify-content: center;
    }
    
    .hero-text h1 {
        font-size: 36px;
    }
    
    .scenario-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
        gap: 30px;
    }
}