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

:root {
    --primary-color: #ff9a9e;
    --secondary-color: #fecfef;
    --accent-color: #a18cd1;
    --text-color: #333;
    --bg-color: #fdfbfb;
    --card-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

body {
    font-family: 'Microsoft YaHei', 'PingFang SC', sans-serif;
    background: linear-gradient(135deg, var(--bg-color) 0%, #ebedee 100%);
    color: var(--text-color);
    min-height: 100vh;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 5%;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--card-shadow);
}

.nav-brand {
    font-size: 1.8rem;
    font-weight: bold;
    color: white;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    text-decoration: none;
    color: white;
    font-size: 1.1rem;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    transition: all 0.3s ease;
}

.nav-links a:hover, .nav-links a.active {
    background: rgba(255,255,255,0.3);
}

.nav-toggle {
    display: none;
    font-size: 1.5rem;
    color: white;
    cursor: pointer;
}

footer {
    text-align: center;
    padding: 2rem;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    color: white;
    margin-top: 3rem;
}

@media (max-width: 768px) {
    .nav-links { display: none; flex-direction: column; position: absolute;
        top: 100%; left: 0; right: 0; background: var(--primary-color); padding: 1rem; }
    .nav-links.active { display: flex; }
    .nav-toggle { display: block; }
}