/* ============================================
   下载页专属样式 - 赛博霓虹风格
   ============================================ */

/* 页面标题区 */
.page-header {
    padding: calc(80px + var(--space-3xl)) 0 var(--space-2xl);
    text-align: center;
    background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
    position: relative;
}

.page-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(ellipse at 50% 0%, rgba(0, 245, 255, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.page-title {
    font-family: var(--font-display);
    font-size: 2.75rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-md);
    text-shadow: 0 0 30px var(--neon-cyan-glow);
    letter-spacing: 2px;
}

.page-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* 主下载区 */
.main-download {
    background: var(--bg-primary);
    padding-top: var(--space-2xl);
}

.download-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-lg);
}

/* 下载卡片 */
.download-card {
    background: var(--bg-glass);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-base);
    backdrop-filter: blur(10px);
    position: relative;
}

.download-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--neon-cyan), var(--neon-purple));
    opacity: 0;
    transition: opacity var(--transition-base);
}

.download-card:hover {
    transform: translateY(-8px);
    border-color: var(--border-neon);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4), 0 0 30px var(--neon-cyan-glow);
}

.download-card:hover::before {
    opacity: 1;
}

/* 平台特定颜色 */
.download-card[data-platform="windows"]:hover {
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4), 0 0 30px rgba(0, 120, 212, 0.3);
}

.download-card[data-platform="windows"]:hover::before {
    background: linear-gradient(90deg, #0078d4, #00a4ef);
}

.download-card[data-platform="macos"]:hover {
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4), 0 0 30px rgba(255, 0, 255, 0.3);
}

.download-card[data-platform="macos"]:hover::before {
    background: linear-gradient(90deg, var(--neon-pink), var(--neon-purple));
}

.download-card[data-platform="android"]:hover {
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4), 0 0 30px var(--neon-green-glow);
}

.download-card[data-platform="android"]:hover::before {
    background: linear-gradient(90deg, var(--neon-green), #00c853);
}

.download-card[data-platform="ios"]:hover {
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4), 0 0 30px rgba(0, 122, 255, 0.3);
}

.download-card[data-platform="ios"]:hover::before {
    background: linear-gradient(90deg, #007aff, #5856d6);
}

/* 推荐标签 */
.download-card.detected {
    border-color: var(--neon-cyan);
    box-shadow: 0 0 0 2px var(--neon-cyan-glow), 0 0 30px var(--neon-cyan-glow);
}

.download-card.detected::after {
    content: '推荐使用';
    position: absolute;
    top: -1px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, var(--neon-cyan), var(--neon-purple));
    color: var(--bg-primary);
    padding: var(--space-xs) var(--space-md);
    border-radius: 0 0 var(--radius-md) var(--radius-md);
    font-size: 0.75rem;
    font-weight: 600;
    font-family: var(--font-display);
    letter-spacing: 1px;
    box-shadow: 0 4px 15px var(--neon-cyan-glow);
}

/* 卡片头部 */
.download-header {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-lg);
    background: linear-gradient(135deg, rgba(0, 245, 255, 0.05), rgba(184, 41, 221, 0.05));
    border-bottom: 1px solid var(--border-subtle);
}

.download-icon {
    font-size: 2.5rem;
    filter: drop-shadow(0 0 10px rgba(255, 255, 255, 0.2));
}

.download-info {
    flex: 1;
}

.download-name {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-xs);
    letter-spacing: 1px;
}

/* 卡片主体 */
.download-body {
    padding: var(--space-lg);
}

.download-version {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-sm);
}

.version-label {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.version-number {
    font-family: var(--font-display);
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--neon-cyan);
    text-shadow: 0 0 10px var(--neon-cyan-glow);
}

.download-meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-sm);
}

.download-requirements {
    font-size: 0.8rem;
    color: var(--text-muted);
    padding: var(--space-sm);
    background: rgba(0, 245, 255, 0.05);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    font-family: var(--font-display);
}

/* 卡片底部 */
.download-footer {
    padding: 0 var(--space-lg) var(--space-lg);
}

.download-footer .btn {
    width: 100%;
    margin-bottom: var(--space-md);
    font-family: var(--font-display);
    letter-spacing: 1px;
}

.download-alt {
    text-align: center;
    font-size: 0.75rem;
}

.download-alt a {
    color: var(--neon-cyan);
    transition: all var(--transition-fast);
    position: relative;
}

.download-alt a:hover {
    color: var(--neon-pink);
    text-shadow: 0 0 10px var(--neon-pink-glow);
}

.download-alt .divider {
    color: var(--text-muted);
    margin: 0 var(--space-sm);
}

/* 安装指南 */
.guide {
    background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    position: relative;
}

.guide::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--neon-purple), transparent);
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-3xl);
}

.section-title {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
    letter-spacing: 2px;
}

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

.guide-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
}

.guide-card {
    text-align: center;
    padding: var(--space-2xl);
    background: var(--bg-glass);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    position: relative;
    transition: all var(--transition-base);
    backdrop-filter: blur(10px);
}

.guide-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--neon-cyan), var(--neon-purple));
    opacity: 0;
    transition: opacity var(--transition-base);
}

.guide-card:hover {
    transform: translateY(-5px);
    border-color: var(--border-neon);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.4), 0 0 20px var(--neon-cyan-glow);
}

.guide-card:hover::before {
    opacity: 1;
}

.guide-step {
    position: absolute;
    top: -20px;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--neon-cyan), var(--neon-purple));
    color: var(--bg-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 700;
    box-shadow: 0 4px 20px var(--neon-cyan-glow);
}

.guide-icon {
    font-size: 3rem;
    margin-bottom: var(--space-lg);
    filter: drop-shadow(0 0 10px rgba(255, 255, 255, 0.2));
}

.guide-title {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
    letter-spacing: 1px;
}

.guide-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* 系统检测提示 */
.system-detect {
    background: linear-gradient(135deg, rgba(0, 245, 255, 0.1), rgba(184, 41, 221, 0.1));
    border: 1px solid var(--border-neon);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    margin-bottom: var(--space-xl);
    text-align: center;
    backdrop-filter: blur(10px);
}

.system-detect-text {
    color: var(--neon-cyan);
    font-family: var(--font-display);
    font-size: 0.95rem;
    letter-spacing: 1px;
}

.system-detect-text span {
    color: var(--text-primary);
    font-weight: 600;
}

/* ============================================
   响应式设计
   ============================================ */
@media (max-width: 1024px) {
    .download-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .page-title {
        font-size: 2.25rem;
    }
}

@media (max-width: 768px) {
    .page-title {
        font-size: 1.75rem;
    }
    
    .download-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
        margin: 0 auto;
    }
    
    .guide-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
        margin: 0 auto;
    }
    
    .section-title {
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    .page-title {
        font-size: 1.5rem;
    }
    
    .download-header {
        padding: var(--space-md);
    }
    
    .download-body {
        padding: var(--space-md);
    }
    
    .download-footer {
        padding: 0 var(--space-md) var(--space-md);
    }
    
    .guide-card {
        padding: var(--space-xl);
    }
    
    .download-icon {
        font-size: 2rem;
    }
    
    .download-name {
        font-size: 1.1rem;
    }
}