:root {
    --primary-color: #e63946;
    --secondary-color: #1d3557;
    --background-color: #f1faee;
    --text-color: #2b2d42;
    --light-color: #a8dadc;
}

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

body {
    font-family: 'Microsoft YaHei', '微软雅黑', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
}

header {
    background-color: var(--secondary-color);
    padding: 1rem 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

nav {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 2rem;
}

.logo {
    color: white;
    font-size: 1.5rem;
    font-weight: bold;
}

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

nav ul li a {
    color: white;
    text-decoration: none;
    padding: 0.5rem 1rem;
    transition: color 0.3s ease;
}

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

main {
    margin-top: 80px;
}

section {
    padding: 4rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.hero {
    text-align: center;
    padding: 6rem 2rem;
    background: linear-gradient(rgba(29, 53, 87, 0.8), rgba(29, 53, 87, 0.8)),
                url('https://images.unsplash.com/photo-1542751371-adc38448a05e?ixlib=rb-1.2.1&auto=format&fit=crop&w=1350&q=80');
    background-size: cover;
    background-position: center;
    color: white;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.cta-buttons {
    margin-top: 2rem;
}

.cta-primary, .cta-secondary {
    display: inline-block;
    padding: 1rem 2rem;
    margin: 0.5rem;
    border-radius: 5px;
    text-decoration: none;
    transition: transform 0.3s ease;
}

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

.cta-secondary {
    background-color: var(--light-color);
    color: var(--secondary-color);
}

.cta-primary:hover, .cta-secondary:hover {
    transform: translateY(-3px);
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.feature-card {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

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

.guide-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.guide-item {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.about {
    background-color: white;
    border-radius: 10px;
    padding: 3rem;
    margin: 2rem auto;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

footer {
    background-color: var(--secondary-color);
    color: white;
    text-align: center;
    padding: 2rem;
    margin-top: 4rem;
}

footer a {
    color: var(--light-color);
    text-decoration: none;
}

h2 {
    color: var(--secondary-color);
    margin-bottom: 1.5rem;
    text-align: center;
}

@media (max-width: 768px) {
    nav {
        flex-direction: column;
        text-align: center;
    }

    nav ul {
        margin-top: 1rem;
        flex-wrap: wrap;
        justify-content: center;
    }

    .hero h1 {
        font-size: 2rem;
    }

    section {
        padding: 2rem 1rem;
    }
}