/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* 预留滚动条槽位，避免切换页面时因是否出现纵向滚动条导致整页横向偏移、导航“抖动” */
html {
    scrollbar-gutter: stable;
}

/* 顶栏：li 内垂直居中链接，避免 stretch 时块级 a 贴顶导致激活胶囊“贴上沿” */
.navbar-menu > li,
.nav-menu > li {
    display: flex;
    align-items: center;
}

/* 顶栏链接统一高度与水平内边距，激活/默认态几何一致 */
.navbar-link,
.nav-link {
    box-sizing: border-box;
    min-height: 40px;
    height: 40px;
    padding: 0 18px;
    line-height: 1.2;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f5f5f5;
    color: #333;
    line-height: 1.6;
}

/* 容器样式 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* 头部样式 */
.header {
    text-align: center;
    margin-bottom: 40px;
    padding: 40px 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    font-weight: 700;
}

.header p {
    font-size: 1.2rem;
    opacity: 0.9;
}

/* 主要内容样式 */
.main {
    display: flex;
    flex-wrap: wrap;
    gap: 40px;
    margin-bottom: 40px;
}

/* 登录表单样式 */
.login-form {
    flex: 1;
    min-width: 300px;
    background: white;
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.login-form h2 {
    margin-bottom: 30px;
    color: #667eea;
    text-align: center;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #555;
}

.form-group input {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-group input:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 2px rgba(102, 126, 234, 0.2);
}

.btn {
    width: 100%;
    padding: 12px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.3s ease;
}

.btn:hover {
    background: linear-gradient(135deg, #5a6fd8 0%, #6b4091 100%);
}

.register-link {
    margin-top: 20px;
    text-align: center;
    font-size: 0.9rem;
}

.register-link a {
    color: #667eea;
    text-decoration: none;
    font-weight: 500;
}

.register-link a:hover {
    text-decoration: underline;
}

/* 信息部分样式 */
.info {
    flex: 1;
    min-width: 300px;
    background: white;
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.info h2 {
    margin-bottom: 20px;
    color: #667eea;
}

.info p {
    margin-bottom: 30px;
    line-height: 1.8;
    color: #555;
}

/* 功能特点样式 */
.features {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.feature {
    padding: 20px;
    background: #f9f9f9;
    border-radius: 8px;
    border-left: 4px solid #667eea;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.feature h3 {
    margin-bottom: 10px;
    color: #333;
}

.feature p {
    margin: 0;
    color: #666;
    font-size: 0.95rem;
}

/* 页脚样式 */
.footer {
    text-align: center;
    padding: 30px 0;
    background: #333;
    color: white;
    border-radius: 10px;
    margin-top: 40px;
}

.footer p {
    font-size: 0.9rem;
    opacity: 0.8;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .main {
        flex-direction: column;
    }
    
    .header h1 {
        font-size: 2rem;
    }
    
    .login-form,
    .info {
        padding: 30px;
    }
}

/* 全站统一：赛事全称（导航下方条带，与首页副标题一致） */
.site-official-tagline {
    margin: 0;
    padding: 8px 20px;
    text-align: center;
    font-size: 12px;
    font-weight: 500;
    color: #64748b;
    background: linear-gradient(180deg, #f1f5f9 0%, #f8fafc 100%);
    border-bottom: 1px solid #e2e8f0;
    letter-spacing: 0.02em;
}

/* 激活页：与下方卡片同宽 */
.site-official-tagline--activate {
    max-width: 440px;
    margin: 0 auto 12px;
    border-radius: 10px;
    border: 1px solid #e2e8f0;
}

@media (max-width: 480px) {
    .container {
        padding: 10px;
    }
    
    .header {
        padding: 30px 0;
    }
    
    .header h1 {
        font-size: 1.8rem;
    }
    
    .login-form,
    .info {
        padding: 20px;
    }
}