:root {
    --primary-color: #007bff; /* Professional Blue */
    --secondary-color: #6c757d; /* Gray */
    --background-light: #f8f9fa;
    --text-dark: #343a40;
    --text-light: #ffffff;
    --spacing: 20px;
}

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

body {
    font-family: 'Noto Sans SC', sans-serif;
    color: var(--text-dark);
    line-height: 1.6;
    background-color: var(--background-light);
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing) 0;
}

/* Header & Navigation */
header {
    background-color: var(--text-light);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    position: sticky;
    top: 0;
    z-index: 1000;
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

nav ul {
    list-style: none;
    display: flex;
}

nav ul li a {
    text-decoration: none;
    color: var(--text-dark);
    margin-left: 20px;
    font-weight: 500;
    transition: color 0.3s;
}

nav ul li a:hover {
    color: var(--primary-color);
}

/* Hero Section */
.hero {
    background: linear-gradient(to right, var(--text-light), var(--background-light));
    padding: 60px 0;
}

.hero .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
    min-height: 400px;
}

.hero-content h2 {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero-content p {
    font-size: 1.25rem;
    margin-bottom: 30px;
    color: var(--secondary-color);
}

.cta-button {
    display: inline-block;
    padding: 12px 30px;
    background-color: var(--primary-color);
    color: var(--text-light);
    text-decoration: none;
    border-radius: 5px;
    font-weight: 700;
    transition: background-color 0.3s, transform 0.1s;
}

.cta-button:hover {
    background-color: #0056b3;
    transform: translateY(-2px);
}

.hero-image img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

/* Features Section */
.features {
    padding: 60px 0;
    text-align: center;
    background-color: var(--text-light);
}

.features h3 {
    font-size: 2rem;
    margin-bottom: 40px;
    color: var(--text-dark);
}

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

.feature-item {
    padding: 30px;
    background-color: var(--background-light);
    border-radius: 8px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s;
}

.feature-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.1);
}

.feature-item .icon {
    font-size: 3rem;
    margin-bottom: 15px;
    display: block;
}

.feature-item h4 {
    color: var(--primary-color);
    margin-bottom: 10px;
    font-size: 1.25rem;
}

.feature-item p {
    color: var(--secondary-color);
}

/* About Section */
.about {
    padding: 60px 0;
    text-align: center;
    background-color: var(--background-light);
}

.about h3 {
    font-size: 2rem;
    margin-bottom: 20px;
}

.about p {
    max-width: 800px;
    margin: 0 auto 30px auto;
    font-size: 1.1rem;
}

.secondary-button {
    display: inline-block;
    padding: 10px 25px;
    background-color: transparent;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    text-decoration: none;
    border-radius: 5px;
    font-weight: 700;
    transition: all 0.3s;
}

.secondary-button:hover {
    background-color: var(--primary-color);
    color: var(--text-light);
}

/* Footer */
footer {
    background-color: var(--text-dark);
    color: var(--text-light);
    padding: 40px 0 10px 0;
    font-size: 0.9rem;
}

footer .container {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding-bottom: 20px;
    border-bottom: 1px solid #495057;
}

footer .footer-info h4 {
    margin-bottom: 10px;
}

footer .footer-info p {
    margin: 5px 0;
}

.social-links a {
    color: var(--text-light);
    text-decoration: none;
    margin-left: 15px;
    opacity: 0.8;
    transition: opacity 0.3s;
}

.social-links a:hover {
    opacity: 1;
    color: var(--primary-color);
}

.copyright {
    text-align: center;
    margin-top: 20px;
    opacity: 0.7;
}

/* Responsiveness */
@media (max-width: 900px) {
    .hero .container {
        flex-direction: column;
        text-align: center;
    }
    
    .hero-content {
        order: 2;
    }

    .hero-image {
        order: 1;
        margin-bottom: 30px;
    }

    .hero-content h2 {
        font-size: 2.5rem;
    }

    header .container {
        flex-direction: column;
        padding-bottom: 10px;
    }

    nav ul {
        margin-top: 10px;
        justify-content: center;
    }

    nav ul li a {
        margin: 0 10px;
    }

    footer .container {
        flex-direction: column;
        text-align: center;
    }

    .footer-info {
        margin-bottom: 20px;
    }

    .social-links {
        margin-top: 10px;
    }
}