/**
 * 官网首页样式文件
 * 
 * 功能说明：
 * 官网首页的CSS样式，参考Traefik官网设计风格，支持昼夜模式。
 * 
 * 作者：系统开发团队
 * 创建日期：2024-01-01
 * 版本号：1.0.0
 */

/* 昼夜模式变量定义 */
:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --text-primary: #1a1a1a;
    --text-secondary: #6c757d;
    --text-muted: #adb5bd;
    --border-color: #e9ecef;
    --primary-color: #007bff;
    --primary-hover: #0056b3;
    --accent-color: #28a745;
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.15);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
    --bg-primary: #000000;
    --bg-secondary: #1a1a1a;
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --text-muted: #808080;
    --border-color: #333333;
    --primary-color: #0d6efd;
    --primary-hover: #0a58ca;
    --accent-color: #198754;
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.7);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', 'PingFang SC', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    transition: background 0.3s ease;
    overflow-x: hidden;
}

[data-theme="dark"] body {
    background: var(--bg-primary);
}

/* 主题切换按钮 */
.theme-toggle {
    position: fixed;
    top: 80px;
    right: 20px;
    width: 45px;
    height: 45px;
    border-radius: 50%;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    cursor: pointer;
    font-size: 22px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    z-index: 998;
}

@media (max-width: 768px) {
    .theme-toggle {
        top: 70px;
        right: 15px;
        width: 40px;
        height: 40px;
        font-size: 18px;
    }
}

.theme-toggle:hover {
    transform: scale(1.1) rotate(15deg);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    z-index: 999;
    transition: var(--transition);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-primary);
    font-size: 1.2em;
    font-weight: 600;
    text-decoration: none;
}

.nav-logo svg {
    width: 32px;
    height: 32px;
    color: var(--primary-color);
}

.logo-text {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 30px;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.95em;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width 0.3s ease;
}

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

.nav-btn {
    padding: 8px 20px;
    background: var(--primary-color);
    color: white !important;
    border-radius: 6px;
    margin-left: 10px;
}

.nav-btn::after {
    display: none;
}

.nav-btn:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* 主要内容 */
.main-content {
    margin-top: 70px;
}

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

/* Hero区域 */
.hero-section {
    padding: 100px 20px;
    text-align: center;
    background: var(--bg-primary);
}

.hero-container {
    max-width: 800px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-block;
    padding: 8px 20px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 50px;
    margin-bottom: 30px;
}

.badge-text {
    color: var(--text-secondary);
    font-size: 0.9em;
    font-weight: 500;
}

.hero-title {
    font-size: 3.5em;
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-primary);
    margin-bottom: 25px;
    letter-spacing: -1px;
}

.hero-description {
    font-size: 1.2em;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-actions {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 32px;
    border-radius: 8px;
    font-size: 1em;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

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

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.btn-secondary:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-2px);
}

/* 功能特性区域 */
.features-section {
    padding: 100px 20px;
    background: var(--bg-secondary);
}

.section-title {
    font-size: 2.5em;
    font-weight: 700;
    text-align: center;
    color: var(--text-primary);
    margin-bottom: 15px;
    letter-spacing: -0.5px;
}

.section-subtitle {
    text-align: center;
    color: var(--text-secondary);
    font-size: 1.1em;
    margin-bottom: 60px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.feature-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 40px 30px;
    text-align: center;
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 25px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    border-radius: 12px;
    color: var(--primary-color);
}

.feature-icon svg {
    width: 48px;
    height: 48px;
}

.feature-title {
    font-size: 1.4em;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 15px;
}

.feature-description {
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 0.95em;
}

/* 关于系统区域 */
.about-section {
    padding: 100px 20px;
    background: var(--bg-primary);
}

.about-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text {
    max-width: 600px;
}

.about-description {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 20px;
    font-size: 1.05em;
}

.about-stats {
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.stat-item {
    text-align: center;
    padding: 30px;
    background: var(--bg-secondary);
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.stat-number {
    font-size: 2.5em;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 1em;
}

/* 页脚 */
.footer {
    padding: 40px 20px;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    text-align: center;
}

.footer-text {
    color: var(--text-muted);
    font-size: 0.9em;
    margin: 0 0 8px 0;
}

.footer-icp {
    margin: 8px 0 0 0;
    font-size: 0.85em;
    color: var(--text-muted);
    opacity: 0.8;
}

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

.footer-icp a:hover {
    color: var(--primary-color);
    opacity: 0.8;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2.2em;
    }
    
    .hero-description {
        font-size: 1em;
    }
    
    .nav-links {
        gap: 15px;
    }
    
    .nav-link {
        font-size: 0.85em;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .about-stats {
        flex-direction: row;
        justify-content: space-around;
    }
    
    .stat-item {
        flex: 1;
        padding: 20px;
    }
    
    .stat-number {
        font-size: 2em;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.8em;
    }
    
    .nav-logo .logo-text {
        display: none;
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .about-stats {
        flex-direction: column;
    }
}