:root {
    --primary: #4e54c8;
    --primary-dark: #3f42a6;
    --secondary: #8f94fb;
    --accent: #ff6b6b;
    --light: #f8f9fa;
    --dark: #212529;
    --gray: #6c757d;
    --light-gray: #e9ecef;
    --success: #28a745;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: #f5f7fa;
    color: var(--dark);
    line-height: 1.6;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 头部样式 */
header {
    background: linear-gradient(to right, var(--primary), var(--secondary));
    color: white;
    padding: 1rem 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo img {
    width: 32px;
    background-color: white;
    border-radius: 5px;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
}
.nav {
    display: flex;
    gap: 25px;
}

.nav-link {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s;
    padding: 0.5rem 0;
    position: relative;
}

.nav-link:hover {
    color: rgba(255, 255, 255, 0.9);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: white;
    transition: width 0.3s;
}

.nav-link:hover::after {
    width: 100%;
}

.nav-link.active {
    color: var(--accent);
}

.nav-link.active::after {
    width: 100%;
    background: var(--accent);
}

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

.btn {
    padding: 0.6rem 1.2rem;
    border-radius: 50px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-primary {
    background: var(--accent);
    color: white;
    border: none;
}

.btn-primary:hover {
    background: #ff5252;
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    color: white;
    border: 2px solid white;
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
}

/* 登录弹窗样式 */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    justify-content: center;
    align-items: center;
}

.modal-content {
    background: white;
    border-radius: 10px;
    width: 100%;
    max-width: 400px;
    padding: 2rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    position: relative;
}

.close-modal {
    position: absolute;
    top: 15px;
    right: 15px;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--gray);
}

.modal-title {
    text-align: center;
    margin-bottom: 1.5rem;
    color: var(--primary);
}

.form-group {
    margin-bottom: 1.2rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-group input {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 1rem;
}

.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
}

.form-options a {
    color: var(--primary);
    text-decoration: none;
}

.modal-footer {
    text-align: center;
    margin-top: 1.5rem;
    font-size: 0.9rem;
}

.modal-footer a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
}
/* 页脚样式 */
footer {
    background: var(--dark);
    color: white;
    padding: 4rem 0 2rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-section h3 {
    margin-bottom: 1.5rem;
    position: relative;
    padding-bottom: 10px;
}

.footer-section h3::after {
    content: '';
    display: block;
    width: 40px;
    height: 3px;
    background: var(--accent);
    position: absolute;
    bottom: 0;
    left: 0;
}

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

.footer-links li {
    margin-bottom: 0.8rem;
}

.footer-links a {
    color: #ddd;
    text-decoration: none;
    transition: color 0.3s;
}

.footer-links a:hover {
    color: white;
}

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

.footer-contact li {
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.copyright {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.9rem;
    color: #aaa;
}

.beian {
    margin-top: 10px;
}

.beian a {
    color: #aaa;
    text-decoration: none;
}

.beian a:hover {
    color: #ccc;
    text-decoration: underline;
}