/* 绿色环保主题样式 */
:root {
    --primary-green: #2E7D32;
    --secondary-green: #81C784;
    --background: #F1F8E9;
    --accent: #558B2F;
}

body {
    font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 20px;
    background-color: var(--background);
    color: #333;
}

nav {
    background: var(--primary-green);
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 2rem;
}

nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    gap: 2rem;
    justify-content: center;
}

nav a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: opacity 0.3s;
}

nav a:hover {
    opacity: 0.8;
}

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

h1, h2 {
    color: var(--accent);
    border-bottom: 2px solid var(--secondary-green);
    padding-bottom: 0.5em;
}

.paper-list, .member-card {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    margin-bottom: 2rem;
}

.paper-item {
    margin: 1.5rem 0;
    padding: 1rem;
    border-left: 4px solid var(--secondary-green);
    background: #F8F9F7;
}

.paper-item a {
    color: var(--primary-green);
    text-decoration: none;
}

.paper-item a:hover {
    text-decoration: underline;
}

.member-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
}

.member-card {
    text-align: center;
    padding: 2rem;
}

.member-card h3 {
    color: var(--primary-green);
    margin: 1rem 0;
}

@media (max-width: 768px) {
    nav ul {
        flex-direction: column;
        gap: 1rem;
    }
    
    .container {
        padding: 10px;
    }
}