/**
 * 摩金云前台统一样式
 * 用于所有前台页面（首页、产品页、帮助等）
 * 配色方案与后台管理系统保持一致
 */

:root {
    /* 主色调 - 明亮科技蓝（与后台一致） */
    --primary-gradient: linear-gradient(135deg, #1E90FF 0%, #00BFFF 100%);
    --primary-dark: #1565C0;
    --primary-light: #42A5F5;
    --primary-color: #1E90FF;
    
    /* 辅助色 */
    --success: #4CAF50;
    --warning: #FF9800;
    --danger: #F44336;
    --info: #2196F3;
    
    /* 中性色 */
    --text-primary: #1E293B;
    --text-secondary: #475569;
    --text-muted: #94A3B8;
    
    /* 背景色 */
    --bg-primary: #F8FAFC;
    --bg-secondary: #F1F5F9;
    --bg-card: #FFFFFF;
    
    /* 阴影 */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
    --shadow-glow: 0 0 30px rgba(30, 144, 255, 0.25);
}

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

body {
    font-family: 'Microsoft YaHei', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--text-primary);
    line-height: 1.6;
    background: var(--bg-primary);
}

/* ==================== Header 头部 ==================== */
.site-header {
    background: white;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    height: 70px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 40px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
    transition: all 0.3s;
}

.logo:hover {
    transform: scale(1.05);
}

.logo i {
    font-size: 28px;
}

.main-nav {
    display: flex;
    gap: 30px;
}

.main-nav a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 15px;
    font-weight: 500;
    transition: all 0.3s;
    position: relative;
    padding: 8px 0;
}

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

.main-nav a.active {
    color: var(--primary-color);
    font-weight: 600;
}

.main-nav a.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--primary-color);
    border-radius: 2px;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 12px;
}

.btn-login, .btn-dashboard {
    padding: 8px 20px;
    border-radius: 8px;
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s;
    color: var(--primary-color);
    border: 2px solid transparent;
}

.btn-login:hover, .btn-dashboard:hover {
    background: var(--bg-primary);
    border-color: var(--primary-color);
}

.btn-register, .btn-logout {
    padding: 8px 20px;
    border-radius: 8px;
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    border: none;
    cursor: pointer;
}

.btn-register:hover, .btn-logout:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    color: var(--text-secondary);
    cursor: pointer;
}

.mobile-menu {
    display: none;
    flex-direction: column;
    background: white;
    border-top: 1px solid #e2e8f0;
    padding: 20px;
    gap: 16px;
}

.mobile-menu.active {
    display: flex;
}

.mobile-menu a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 15px;
    padding: 8px 0;
    border-bottom: 1px solid var(--bg-primary);
}

/* ==================== Footer 页脚 ==================== */
.site-footer {
    background: linear-gradient(135deg, var(--text-primary) 0%, #1a202c 100%);
    color: var(--text-muted);
    padding: 60px 0 20px;
    margin-top: 80px;
}

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

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-column h3 {
    color: white;
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 20px;
}

.footer-description {
    font-size: 14px;
    line-height: 1.8;
    margin-bottom: 20px;
    color: var(--text-muted);
}

.footer-social {
    display: flex;
    gap: 12px;
}

.footer-social a {
    width: 36px;
    height: 36px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    transition: all 0.3s;
    text-decoration: none;
}

.footer-social a:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-3px);
}

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

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 14px;
    transition: all 0.3s;
    display: inline-block;
}

.footer-links a:hover {
    color: var(--primary-color);
    padding-left: 5px;
}

.footer-bottom {
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.footer-copyright p {
    margin: 5px 0;
    font-size: 13px;
    color: var(--text-muted);
}

.footer-licenses {
    margin-top: 12px;
}

.footer-licenses p {
    margin: 4px 0;
    font-size: 12px;
    color: var(--text-muted);
}

.icp-info a {
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.3s;
}

.icp-info a:hover {
    color: var(--primary-color);
}

.footer-info {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
}

.footer-info span {
    font-size: 13px;
    color: var(--text-muted);
}

.footer-info i {
    margin-right: 6px;
    color: var(--primary-color);
}

/* ==================== 通用容器 ==================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ==================== 页面标题区域 ==================== */
.page-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    padding: 60px 20px;
    text-align: center;
    color: white;
}

.page-header h1 {
    font-size: 42px;
    margin-bottom: 16px;
}

.page-header p {
    font-size: 18px;
    opacity: 0.9;
}

/* ==================== 章节标题 ==================== */
.section-title {
    text-align: center;
    margin-bottom: 60px;
}

.section-title h2 {
    font-size: 36px;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.section-title p {
    font-size: 18px;
    color: var(--text-muted);
}

/* ==================== 按钮样式 ==================== */
.btn-hero {
    padding: 16px 40px;
    border-radius: 12px;
    text-decoration: none;
    font-size: 16px;
    font-weight: 600;
    transition: all 0.3s;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-primary {
    background: white;
    color: var(--primary-color);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}

.btn-secondary {
    background: rgba(255,255,255,0.2);
    color: white;
    border: 2px solid white;
}

.btn-secondary:hover {
    background: white;
    color: var(--primary-color);
}

.btn-cta {
    display: inline-block;
    padding: 16px 40px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    text-decoration: none;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    transition: all 0.3s;
}

.btn-cta:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(102, 126, 234, 0.4);
}

/* ==================== 动画 ==================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==================== 响应式设计 ==================== */
@media (max-width: 968px) {
    .main-nav, .header-right {
        display: none;
    }

    .mobile-menu-toggle {
        display: block;
    }
}

@media (max-width: 768px) {
    .page-header h1 {
        font-size: 28px;
    }

    .page-header p {
        font-size: 16px;
    }

    .section-title h2 {
        font-size: 28px;
    }

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

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

    .footer-info {
        flex-direction: column;
        gap: 10px;
    }
}