/* 公共样式 - 用于header和footer组件 */

/* CSS变量定义 */
:root {
    --primary-color: #4361ee;
    --primary-light: #4895ef;
    --secondary-color: #3f37c9;
    --dark-color: #1a1a2e;
    --light-color: #f8f9fa;
    --gray-color: #6c757d;
    --success-color: #4cc9f0;
    --warning-color: #ff9e00;
    --danger-color: #ff6b6b;
    --border-radius: 12px;
    --box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    --box-shadow-hover: 0 15px 40px rgba(0, 0, 0, 0.15);
    --transition: all 0.3s ease;
}

/* 基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
}

body {
    background: linear-gradient(135deg, #f5f7fa 0%, #e4edf5 100%);
    color: var(--dark-color);
    line-height: 1.6;
    min-height: 100vh;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 头部导航样式 */
header {
    background-color: white;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.07);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
    background-color: rgba(255, 255, 255, 0.95);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.7rem;
    font-weight: 800;
    color: var(--primary-color);
    text-decoration: none;
}

.logo i {
    font-size: 2rem;
}

.logo-text {
    background: linear-gradient(90deg, var(--primary-color), var(--primary-light));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

nav ul {
    display: flex;
    list-style: none;
    gap: 30px;
}

nav a {
    text-decoration: none;
    color: var(--dark-color);
    font-weight: 600;
    padding: 8px 0;
    position: relative;
    transition: var(--transition);
    font-size: 1.05rem;
}

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

nav a.active {
    color: var(--primary-color);
}

nav a.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background-color: var(--primary-color);
    border-radius: 3px;
}

.user-actions {
    display: flex;
    gap: 15px;
    align-items: center;
}

.btn-login, .btn-register {
    padding: 10px 24px;
    border-radius: 50px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    font-size: 1rem;
}

.btn-login {
    background-color: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-login:hover {
    background-color: rgba(67, 97, 238, 0.05);
}

.btn-register {
    background: linear-gradient(90deg, var(--primary-color), var(--primary-light));
    color: white;
}

.btn-register:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(67, 97, 238, 0.3);
}

/* Footer容器样式 - 确保footer铺满屏幕 */
#footer-container {
    width: 100%;
}

/* 页脚样式 */
footer {
    background-color: var(--dark-color);
    color: white;
    padding: 70px 0 30px;
    margin-top: 50px;
    width: 100%;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 50px;
    margin-bottom: 50px;
}

.footer-section h3 {
    font-size: 1.4rem;
    margin-bottom: 25px;
    color: white;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 15px;
}

.footer-links a {
    color: #aaa;
    text-decoration: none;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 10px;
}

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

.social-links {
    display: flex;
    gap: 20px;
    margin-top: 25px;
}

.social-links a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 45px;
    height: 45px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: white;
    font-size: 1.2rem;
    transition: var(--transition);
}

.social-links a:hover {
    background-color: var(--primary-color);
    transform: translateY(-5px);
}

.copyright {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: #aaa;
    font-size: 0.95rem;
}

/* 简洁版页脚样式 */
.footer-simple {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
    flex-wrap: wrap;
    gap: 20px;
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: white;
    font-size: 1.3rem;
    font-weight: 700;
}

.footer-logo i {
    color: var(--primary-light);
}

.footer-desc {
    color: #aaa;
    font-size: 0.9rem;
}

.footer-nav {
    display: flex;
    align-items: center;
    gap: 15px;
}

.footer-nav a {
    color: #ccc;
    text-decoration: none;
    font-size: 0.95rem;
    transition: var(--transition);
}

.footer-nav a:hover {
    color: var(--primary-light);
}

.footer-divider {
    color: #555;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .header-container {
        flex-direction: column;
        gap: 20px;
    }

    nav ul {
        flex-wrap: wrap;
        justify-content: center;
        gap: 20px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    footer {
        padding: 40px 0 20px;
    }

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

    .footer-brand {
        align-items: center;
    }

    .footer-nav {
        flex-wrap: wrap;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .logo {
        font-size: 1.4rem;
    }
    
    .logo i {
        font-size: 1.6rem;
    }
    
    nav a {
        font-size: 0.95rem;
    }
    
    .btn-login, .btn-register {
        padding: 8px 16px;
        font-size: 0.9rem;
    }
    
    footer {
        padding: 40px 0 20px;
    }
    
    .footer-section h3 {
        font-size: 1.2rem;
    }
}