:root {
    --primary-color: #2A9D8F;
    --secondary-color: #E9C46A;
    --accent-color: #E76F51;
    --text-color: #264653;
    --bg-color: #FDFDFD;
    --light-bg: #F4F9F9;
    --white: #FFFFFF;
    --border-radius: 12px;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    --font-main: 'Noto Sans SC', sans-serif;
}

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

body {
    font-family: var(--font-main);
    color: var(--text-color);
    background-color: var(--bg-color);
    line-height: 1.6;
    font-size: 18px; /* Larger base font for readability */
}

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

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

/* Header */
.header {
    background-color: var(--white);
    box-shadow: var(--shadow);
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header .container {
    display: flex;
    align-items: center;
}

.nav {
    display: flex;
    align-items: center;
    width: 100%;
}

.logo {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
    margin-right: auto;
}

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

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

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

.lang-switch {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 16px;
    margin-left: 20px;
}

.lang-switch a {
    font-weight: 500;
    color: #999;
    transition: color 0.3s;
}

.lang-switch a:hover,
.lang-switch a.active {
    color: var(--primary-color);
    font-weight: 700;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 30px;
    font-weight: 600;
    transition: transform 0.2s, box-shadow 0.2s;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.1);
}

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

.btn-secondary {
    background-color: transparent;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    margin-left: 15px;
}

/* Hero Section */
.hero {
    padding: 80px 0;
    background: linear-gradient(135deg, var(--light-bg) 0%, #fff 100%);
}

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

.hero-content {
    flex: 1;
}

.hero h1 {
    font-size: 48px;
    line-height: 1.2;
    margin-bottom: 20px;
    color: var(--text-color);
}

.hero-subtitle {
    font-size: 20px;
    color: #555;
    margin-bottom: 30px;
    max-width: 600px;
}

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

.device-mockup {
    width: 300px;
    height: 400px;
    background-color: var(--secondary-color);
    border-radius: 40px;
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
}

.device-screen {
    width: 260px;
    height: 180px;
    background-color: #333;
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 24px;
    margin-bottom: 20px;
}

.device-body {
    width: 200px;
    height: 100px;
    background: repeating-linear-gradient(
        45deg,
        rgba(255,255,255,0.1),
        rgba(255,255,255,0.1) 10px,
        transparent 10px,
        transparent 20px
    );
    border-radius: 10px;
}

/* Sections General */
.section-title {
    text-align: center;
    font-size: 36px;
    margin-bottom: 60px;
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background-color: var(--secondary-color);
    margin: 15px auto 0;
    border-radius: 2px;
}

/* Features */
.features {
    padding: 100px 0;
}

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

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

.feature-card:hover {
    transform: translateY(-5px);
}

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

.feature-card h3 {
    margin-bottom: 15px;
    color: var(--primary-color);
}

/* Scenarios */
.scenarios {
    padding: 100px 0;
    background-color: var(--light-bg);
}

.scenario-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}

.scenario-item {
    background: var(--white);
    padding: 30px;
    border-radius: var(--border-radius);
    border-left: 5px solid var(--accent-color);
}

.scenario-item h3 {
    margin-bottom: 15px;
    font-size: 24px;
}

/* Tech Specs */
.tech-specs {
    padding: 100px 0;
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 30px;
}

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

.tech-item h4 {
    font-size: 20px;
    margin-bottom: 10px;
    color: var(--text-color);
}

/* CTA */
.cta {
    padding: 80px 0;
    background-color: var(--primary-color);
    color: var(--white);
    text-align: center;
}

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

.cta p {
    font-size: 20px;
    margin-bottom: 40px;
    opacity: 0.9;
}

.cta .btn {
    background-color: var(--white);
    color: var(--primary-color);
}

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

/* Footer */
.footer {
    padding: 40px 0;
    background-color: #1d353f;
    color: #ccc;
    text-align: center;
    font-size: 14px;
}

/* Responsive */
@media (max-width: 768px) {
    .hero .container {
        flex-direction: column;
        text-align: center;
    }

    .hero h1 {
        font-size: 36px;
    }

    .nav-links {
        display: none; /* Simple hide for mobile MVP, would add hamburger menu in full prod */
    }
    
    .header .container {
        justify-content: center;
    }
}