/* 全局样式 */
:root {
    --primary-color: #2196f3;
    --secondary-color: #00bcd4;
    --accent-color: #ff4081;
    --dark-color: #1a237e;
    --light-color: #e3f2fd;
    --gradient: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
}

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

body {
    font-family: 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f7fa;
}

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

/* 导航栏样式 */
.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5em;
    font-weight: bold;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-decoration: none;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 20px;
}

.nav-links a {
    color: #333;
    text-decoration: none;
    padding: 8px 15px;
    border-radius: 20px;
    transition: all 0.3s ease;
    position: relative;
}

.nav-links a:hover,
.nav-links a.active {
    background: var(--gradient);
    color: white;
}

.nav-links a.active:after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 50%;
    transform: translateX(-50%);
    width: 5px;
    height: 5px;
    background: var(--accent-color);
    border-radius: 50%;
}

.auth-links {
    display: flex;
    align-items: center;
    gap: 15px;
}

.auth-links a {
    color: #333;
    text-decoration: none;
    padding: 8px 15px;
    border-radius: 20px;
    transition: all 0.3s ease;
}

.auth-links a:hover {
    background: var(--gradient);
    color: white;
}

/* 页脚样式 */
footer {
    background: var(--dark-color);
    color: white;
    padding: 40px 0 20px;
    margin-top: 50px;
    position: relative;
    overflow: hidden;
}

footer:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient);
}

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

.footer-section h3 {
    color: var(--light-color);
    margin-bottom: 20px;
    font-size: 1.2em;
    position: relative;
    padding-bottom: 10px;
}

.footer-section h3:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 2px;
    background: var(--gradient);
}

.footer-section p {
    margin: 5px 0;
    color: rgba(255,255,255,0.8);
}

.footer-section ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-section ul li {
    margin-bottom: 10px;
}

.footer-section ul li a {
    color: rgba(255,255,255,0.8);
    text-decoration: none;
    transition: all 0.3s ease;
    display: inline-block;
}

.footer-section ul li a:hover {
    color: white;
    transform: translateX(5px);
}

.social-links {
    display: flex;
    gap: 15px;
}

.social-link {
    color: rgba(255,255,255,0.8);
    text-decoration: none;
    transition: all 0.3s ease;
    padding: 8px;
    border-radius: 50%;
    background: rgba(255,255,255,0.1);
}

.social-link:hover {
    color: white;
    background: var(--gradient);
    transform: translateY(-3px);
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255,255,255,0.1);
}

.footer-bottom p {
    margin: 0;
    color: rgba(255,255,255,0.6);
    font-size: 0.9em;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .navbar .container {
        flex-direction: column;
        gap: 15px;
    }

    .nav-links {
        flex-direction: column;
        text-align: center;
    }

    .auth-links {
        flex-direction: column;
    }

    .footer-content {
        grid-template-columns: 1fr;
    }
}