:root {
    --primary-color: #3498db;      /* 蓝色强调色 */
    --secondary-color: #2c3e50;   /* 深蓝灰色 */
    --accent-color: #2980b9;      /* 深蓝色 */
    --bg-light: #f8f9fa;          /* 亮色背景 */
    --bg-card: #ffffff;           /* 白色卡片 */
    --text-dark: #2c3e50;         /* 深色文字 */
    --text-muted: #7f8c8d;        /* 灰色文字 */
    --border-color: #e0e0e0;     /* 浅边框 */
    --success-color: #27ae60;     /* 绿色 */
    --warning-color: #f39c12;     /* 橙色 */
    --shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

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

.logo {
    display: block;
    margin: 0 auto 25px;
    width: 100px;
    height: auto;
    border-radius: 20px;
    box-shadow: 0 0 20px rgba(157, 78, 221, 0.4);
}

body {
    font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
    background-color: var(--bg-light);
    color: var(--text-dark);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

/* 背景图片 */
.background-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background-image: url('../assets/background.png');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    opacity: 0.15;
}

/* 导航栏 */
.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 15px 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 2px solid var(--primary-color);
    box-shadow: var(--shadow);
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.4rem;
    font-weight: bold;
    color: var(--text-dark);
    text-decoration: none;
}

.logo img {
    height: 40px;
    width: auto;
}

.nav-links {
    display: flex;
    gap: 20px;
    align-items: center;
}

.nav-link {
    color: var(--text-dark);
    text-decoration: none;
    padding: 8px 16px;
    border-radius: 6px;
    transition: all 0.3s ease;
    position: relative;
}

.nav-link:hover {
    background: rgba(52, 152, 219, 0.1);
    color: var(--primary-color);
}

.nav-link.active {
    background: var(--primary-color);
    color: white;
}

.github-btn {
    background: #333;
    color: white;
    padding: 8px 16px;
    border-radius: 6px;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s ease;
}

.github-btn:hover {
    background: #444;
    transform: translateY(-2px);
}

.menu-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
}

.menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-dark);
    border-radius: 3px;
}

/* 页面容器 */
.page-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 20px;
}

/* 首页样式 */
.hero-section {
    text-align: center;
    padding: 80px 20px;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.95), rgba(248, 249, 250, 0.95));
    border-radius: 16px;
    margin-bottom: 50px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow);
}

.hero-title {
    font-size: 3.5rem;
    margin-bottom: 20px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--text-muted);
    margin-bottom: 40px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

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

.btn {
    padding: 14px 32px;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
    box-shadow: 0 4px 15px rgba(52, 152, 219, 0.3);
}

.btn-primary:hover {
    background: var(--accent-color);
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(52, 152, 219, 0.4);
}

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

.btn-secondary:hover {
    background: rgba(52, 152, 219, 0.05);
    border-color: var(--primary-color);
    transform: translateY(-3px);
}

/* 贡献者卡片样式 */
.contributors-section {
    margin-top: 60px;
}

.section-title {
    font-size: 2rem;
    margin-bottom: 30px;
    color: var(--text-dark);
    text-align: center;
    position: relative;
    padding-bottom: 15px;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 3px;
    background: var(--primary-color);
    border-radius: 3px;
}

.contributors-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 25px;
    margin-top: 40px;
}

.contributor-card {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 25px;
    border-left: 5px solid var(--primary-color);
    box-shadow: var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    align-items: flex-start;
    gap: 20px;
}

.contributor-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.15);
}

.avatar {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--primary-color);
    flex-shrink: 0;
}

.contributor-content {
    flex: 1;
}

.contributor-name {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-dark);
    display: inline-block;
    transition: color 0.3s ease;
}

.contributor-name:hover {
    color: var(--primary-color);
    text-decoration: underline;
}

.github-id {
    display: inline-block;
    background: rgba(52, 152, 219, 0.1);
    padding: 4px 12px;
    border-radius: 20px;
    font-family: monospace;
    font-size: 0.95rem;
    margin-bottom: 15px;
    color: var(--primary-color);
}

.contribution-desc {
    color: var(--text-muted);
    font-size: 1rem;
}

/* 关于页面样式 */
.about-content {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 40px;
    margin-top: 30px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow);
}

.about-text {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 30px;
    color: var(--text-muted);
}

/* 下载页面样式 */
.download-section {
    margin-top: 40px;
}

.download-group {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 30px;
    margin-bottom: 30px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow);
}

.group-title {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: var(--text-dark);
    display: flex;
    align-items: center;
    gap: 10px;
}

.download-buttons {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-top: 25px;
}

.download-btn {
    padding: 18px 24px;
    border-radius: 10px;
    text-decoration: none;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    font-weight: 600;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
}

.download-btn.primary {
    background: var(--primary-color);
    color: white;
    box-shadow: 0 4px 15px rgba(52, 152, 219, 0.3);
}

.download-btn.primary:hover {
    background: var(--accent-color);
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(52, 152, 219, 0.4);
}

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

.download-btn.secondary:hover {
    background: rgba(52, 152, 219, 0.05);
    border-color: var(--primary-color);
    transform: translateY(-3px);
}

.version-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 30px;
    background: var(--bg-card);
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow);
}

.version-table th,
.version-table td {
    padding: 16px 20px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.version-table th {
    background: rgba(52, 152, 219, 0.1);
    color: var(--text-dark);
    font-weight: 600;
}

.version-table tr:last-child td {
    border-bottom: none;
}

.feature-good {
    color: var(--success-color);
    font-weight: bold;
}

.feature-bad {
    color: var(--warning-color);
    font-weight: bold;
}

/* 友情链接页面样式 */
.links-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
    margin-top: 40px;
}

.link-card {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 25px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
    text-decoration: none;
    color: inherit;
    box-shadow: var(--shadow);
}

.link-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.link-title {
    font-size: 1.3rem;
    color: var(--text-dark);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.link-desc {
    color: var(--text-muted);
    font-size: 1rem;
}

/* 免责声明样式 */
.disclaimer {
    background: rgba(255, 255, 255, 0.9);
    border-radius: 12px;
    padding: 25px;
    font-size: 0.95rem;
    color: #666;
    border: 1px solid var(--border-color);
    margin-top: 40px;
    box-shadow: var(--shadow);
}

.disclaimer h3 {
    color: #e74c3c;
    margin-bottom: 15px;
    font-size: 1.2rem;
}

/* 特别鸣谢 */
.special-thanks {
    background: linear-gradient(135deg, rgba(52, 152, 219, 0.1), rgba(41, 128, 185, 0.1));
    border-radius: 12px;
    padding: 25px;
    margin: 50px auto;
    text-align: center;
    border: 1px dashed var(--primary-color);
    max-width: 800px;
    box-shadow: var(--shadow);
}

.special-thanks h2 {
    color: var(--primary-color);
    margin-bottom: 15px;
    font-size: 1.5rem;
}

/* 页脚样式 */
footer {
    text-align: center;
    padding: 40px 20px;
    margin-top: 60px;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 0.9rem;
    background: var(--bg-card);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .navbar {
        padding: 15px 20px;
    }

    .nav-links {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--bg-card);
        flex-direction: column;
        padding: 20px;
        gap: 15px;
        transform: translateY(-150%);
        transition: transform 0.3s ease;
        border-bottom: 2px solid var(--primary-color);
        box-shadow: var(--shadow);
    }

    .nav-links.active {
        transform: translateY(0);
    }

    .menu-toggle {
        display: flex;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.2rem;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 300px;
    }

    .contributors-grid {
        grid-template-columns: 1fr;
    }

    .contributor-card {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .download-buttons {
        grid-template-columns: 1fr;
    }

    .version-table {
        display: block;
        overflow-x: auto;
    }
}