:root {
    /* 高级暗黑主题配色 */
    --primary-color: #8b5cf6;
    --primary-dark: #7c3aed;
    --primary-light: #a78bfa;
    --secondary-color: #06b6d4;
    --accent-color: #10b981;
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-card: #1e293b;
    --bg-hover: #334155;
    --border-color: #475569;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
    --border-radius: 12px;
    --border-radius-sm: 8px;
    --transition: all 0.2s ease;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4);
    --shadow-card: 0 8px 25px rgba(0, 0, 0, 0.5);
}

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

body {
    font-family: 'Inter', sans-serif;
    background: linear-gradient(135deg, #0f172a 0%, #1e1b4b 100%);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

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

/* 导航栏样式 */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 25px 0;
    margin-bottom: 30px;
    border-bottom: 1px solid var(--border-color);
}

.nav-brand {
    font-size: 1.5rem;
    font-weight: 700;
}

.brand-text {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    background-clip: text;
    -webkit-background-clip: text;
    color: transparent;
    -webkit-text-fill-color: transparent;
}

.nav-links {
    display: flex;
    gap: 2px;
    background: var(--bg-secondary);
    border-radius: var(--border-radius-sm);
    padding: 4px;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: 8px;
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
    font-weight: 500;
}

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

.nav-link.active {
    color: var(--text-primary);
    background: var(--primary-color);
    box-shadow: var(--shadow);
}

.nav-controls {
    display: flex;
    align-items: center;
    gap: 15px;
}

/* 语言切换 */
.language-switcher {
    position: relative;
}

.lang-btn {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 10px 16px;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 500;
    font-size: 0.9rem;
}

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

.dropdown {
    display: none;
    position: absolute;
    top: 100%;
    right: 0;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    box-shadow: var(--shadow-lg);
    margin-top: 5px;
    min-width: 120px;
    z-index: 1000;
}

.dropdown.show {
    display: block;
}

.dropdown-item {
    padding: 12px 16px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    border-bottom: 1px solid var(--border-color);
}

.dropdown-item:last-child {
    border-bottom: none;
}

.dropdown-item:hover {
    background: var(--primary-color);
}

.version {
    background: var(--primary-color);
    color: white;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

/* 头部样式 */
.header {
    text-align: center;
    padding: 50px 0;
    margin-bottom: 50px;
    position: relative;
}

.header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, var(--primary-color) 0%, transparent 70%);
    opacity: 0.1;
    filter: blur(40px);
}

.header-content {
    position: relative;
    z-index: 1;
}

.main-title {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 12px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    background-clip: text;
    -webkit-background-clip: text;
    color: transparent;
    -webkit-text-fill-color: transparent;
}

.subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    font-weight: 400;
    margin-bottom: 20px;
}

/* 章节标题 */
.section-title {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 30px;
    color: var(--text-primary);
    text-align: center;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 2px;
}

/* 核心功能网格 */
.core-features {
    margin-bottom: 60px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

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

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

.feature-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 1.8rem;
    color: white;
}

.feature-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.feature-card p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* 英雄库样式 */
.champions-section {
    margin-bottom: 60px;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: 30px;
    flex-wrap: wrap;
    gap: 20px;
}

.controls {
    display: flex;
    align-items: center;
    gap: 20px;
    flex-wrap: wrap;
}

.search-box {
    position: relative;
    min-width: 280px;
}

.search-box i {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
}

.search-box input {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 12px 16px 12px 48px;
    border-radius: var(--border-radius-sm);
    width: 100%;
    transition: var(--transition);
    font-size: 0.95rem;
}

.search-box input:focus {
    border-color: var(--primary-color);
    outline: none;
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.1);
}

.filter-buttons {
    display: flex;
    gap: 8px;
    background: var(--bg-secondary);
    border-radius: var(--border-radius-sm);
    padding: 4px;
}

.filter-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 10px 20px;
    border-radius: 6px;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.9rem;
    font-weight: 500;
}

.filter-btn.active,
.filter-btn:hover {
    background: var(--primary-color);
    color: white;
}

/* 英雄网格 */
.champions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(90px, 1fr));
    gap: 20px;
    margin-bottom: 40px;
}

.champion-card {
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
}

.champion-card:hover {
    transform: scale(1.05);
}

.champion-icon {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    margin: 0 auto 10px;
    border: 3px solid transparent;
    transition: var(--transition);
    object-fit: cover;
}

.champion-card.supported .champion-icon {
    border-color: var(--success-color);
}

.champion-card.unsupported .champion-icon {
    filter: grayscale(100%);
    opacity: 0.6;
    border-color: var(--error-color);
}

.champion-name {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-weight: 500;
    line-height: 1.2;
}

/* 统计信息 */
.stats {
    display: flex;
    justify-content: center;
    gap: 50px;
    padding: 30px;
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}

.stat-item {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 4px;
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* 下载区域 */
.download-section {
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.1) 0%, rgba(6, 182, 212, 0.1) 100%);
    border-radius: var(--border-radius);
    padding: 50px;
    text-align: center;
    margin-bottom: 50px;
    border: 1px solid var(--border-color);
}

.download-content h2 {
    font-size: 2.2rem;
    margin-bottom: 16px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    background-clip: text;
    -webkit-background-clip: text;
    color: transparent;
    -webkit-text-fill-color: transparent;
}

.download-content p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 30px;
}

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

.download-btn {
    padding: 14px 28px;
    border-radius: var(--border-radius-sm);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 10px;
    border: 1px solid transparent;
    font-size: 0.95rem;
}

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

.download-btn.primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

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

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

/* Demon AIO 特有样式 */
.aio-download {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.1) 0%, rgba(6, 182, 212, 0.1) 100%);
}

/* 页脚 */
.footer {
    text-align: center;
    padding: 40px 0;
    color: var(--text-muted);
    border-top: 1px solid var(--border-color);
    font-size: 0.9rem;
}

/* 页面切换 */
.page {
    display: none;
}

.page.active {
    display: block;
}

/* 语言切换相关 */
[data-lang="en"] [data-zh],
[data-lang="zh"] [data-en] {
    display: none;
}

[data-lang="en"] [data-en],
[data-lang="zh"] [data-zh] {
    display: inline;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }
    
    .navbar {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }
    
    .nav-links {
        width: 100%;
        justify-content: center;
    }
    
    .main-title {
        font-size: 2.2rem;
    }
    
    .section-header {
        flex-direction: column;
        align-items: stretch;
    }
    
    .controls {
        justify-content: center;
    }
    
    .search-box {
        min-width: 100%;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .champions-grid {
        grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
        gap: 15px;
    }
    
    .stats {
        flex-direction: column;
        gap: 25px;
        padding: 20px;
    }
    
    .download-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .download-btn {
        width: 220px;
        justify-content: center;
    }
    
    .download-section {
        padding: 30px 20px;
    }
}

.download-notification {
    position: fixed;
    top: 20px;
    right: 20px;
    background: var(--primary-color);
    color: white;
    padding: 12px 20px;
    border-radius: var(--border-radius-sm);
    box-shadow: var(--shadow-lg);
    z-index: 10000;
    transform: translateX(400px);
    opacity: 0;
    transition: all 0.3s ease;
}

.download-notification.show {
    transform: translateX(0);
    opacity: 1;
}

/* 提示模态框 */

/* 模态框样式 */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    z-index: 10000;
    backdrop-filter: blur(5px);
}

.modal.show {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    width: 90%;
    max-width: 500px;
    box-shadow: var(--shadow-lg);
    animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
    color: var(--text-primary);
    font-size: 1.3rem;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.5rem;
    cursor: pointer;
    transition: var(--transition);
    padding: 0;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-close:hover {
    color: var(--error-color);
    background: rgba(239, 68, 68, 0.1);
    border-radius: 4px;
}

.modal-body {
    padding: 24px;
}

.usage-steps {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.usage-step {
    display: flex;
    gap: 15px;
    align-items: flex-start;
}

.step-number {
    background: var(--primary-color);
    color: white;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.9rem;
    flex-shrink: 0;
}

.step-content strong {
    color: var(--text-primary);
    font-weight: 600;
    display: block;
    margin-bottom: 4px;
}

.step-content p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.5;
    margin: 0;
}

.modal-footer {
    padding: 16px 24px 24px;
    text-align: center;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 10px 24px;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
}

.btn-primary:hover {
    background: var(--primary-dark);
}

.file-name, .core-name {
    color: var(--primary-color);
    font-weight: 600;
    background: rgba(139, 92, 246, 0.1);
    padding: 2px 6px;
    border-radius: 4px;
    margin: 0 2px;
}

/* Demon Zero 下载区域样式 */
.zero-download {
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.1) 0%, rgba(16, 185, 129, 0.1) 100%);
}