/* 响应式设计 - 导航系统 */

/* Logo响应式样式 */
@media (max-width: 768px) {
    .logo-icon {
        width: 36px;
        height: 36px;
        font-size: 18px;
    }
}

/* 移动端导航 (768px以下) */
@media (max-width: 768px) {
    /* 隐藏桌面端导航 */
    .nav {
        display: none;
    }
    
    /* 显示移动端菜单按钮 */
    .mobile-menu-btn {
        display: flex;
    }
    
    /* 显示移动端导航 */
    .mobile-nav {
        display: block;
    }
}

/* 桌面端导航 (769px以上) */
@media (min-width: 769px) {
    /* 显示桌面端导航 */
    .nav {
        display: flex !important;
        visibility: visible !important;
        opacity: 1 !important;
    }
    
    .nav-list {
        display: flex !important;
        flex-direction: row !important;
    }
    
    .nav-link {
        display: inline-block !important;
    }
    
    /* 隐藏移动端菜单按钮 */
    .mobile-menu-btn {
        display: none !important;
        visibility: hidden !important;
        opacity: 0 !important;
    }
    
    /* 强制隐藏移动端导航 */
    .mobile-nav {
        display: none !important;
        visibility: hidden !important;
        opacity: 0 !important;
        position: fixed !important;
        top: -100% !important;
        left: -100% !important;
        right: -100% !important;
        width: 0 !important;
        height: 0 !important;
        transform: none !important;
        background: transparent !important;
        z-index: -1 !important;
    }
    
    .mobile-nav-content {
        display: none !important;
        visibility: hidden !important;
        opacity: 0 !important;
    }
    
    .mobile-nav-menu {
        display: none !important;
        visibility: hidden !important;
        opacity: 0 !important;
    }
    
    .mobile-nav-link {
        display: none !important;
        visibility: hidden !important;
        opacity: 0 !important;
    }
}

/* 小屏幕设备 (手机) */
@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }
    
    .hero-title {
        font-size: 3rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .hero-tagline {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .btn {
        padding: 10px 20px;
        font-size: 14px;
    }
    
    .btn-large {
        padding: 14px 28px;
        font-size: 16px;
    }
    
    .feature-card {
        padding: 24px;
    }
    
    .comparison-card {
        padding: 24px;
    }
    
    .release-banner {
        padding: 32px 24px;
    }
    
    .floating-feature {
        font-size: 12px;
        padding: 6px 12px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .footer-section {
        min-height: auto;
    }
}

/* 中等屏幕设备 (平板) */
@media (min-width: 481px) and (max-width: 768px) {
    .hero-title {
        font-size: 4rem;
    }
    
    .section-title {
        font-size: 2.5rem;
    }
    
    .feature-detail {
        grid-template-columns: 1fr;
        gap: 48px;
    }
    
    .savings-comparison {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    
    .footer-links {
        grid-template-columns: repeat(2, 1fr);
        gap: 32px;
    }
    
    .footer-section {
        min-height: 180px;
    }
}

/* 大屏幕设备 (桌面) */
@media (min-width: 769px) {
    .hero-section {
        min-height: 100vh;
    }
    
    .features-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .footer-content {
        grid-template-columns: 1fr 4fr;
        gap: 48px;
    }
    
    .footer-links {
        display: grid !important;
        grid-template-columns: repeat(4, 1fr) !important;
        gap: 32px !important;
        width: 100% !important;
        flex-wrap: nowrap !important;
    }
    
    .footer-section {
        min-height: 200px;
        flex: 1 !important;
        max-width: 100% !important;
        display: flex !important;
        flex-direction: column !important;
    }
}

/* 超大屏幕设备 */
@media (min-width: 1200px) {
    .container {
        max-width: 1400px;
    }
    
    .hero-title {
        font-size: 8rem;
    }
    
    .footer-links {
        display: grid !important;
        grid-template-columns: repeat(4, 1fr) !important;
        gap: 40px !important;
        width: 100% !important;
    }
    
    .footer-section {
        min-height: 220px;
        flex: 1 !important;
    }
    
    .section-title {
        font-size: 4rem;
    }
}

/* 横屏模式 */
@media (orientation: landscape) and (max-height: 500px) {
    .hero-section {
        min-height: auto;
        padding: 40px 0;
    }
    
    .hero-title {
        font-size: 3rem;
    }
    
    .hero-tagline {
        font-size: 2rem;
    }
}

/* 高分辨率屏幕 */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .logo-icon {
        background: linear-gradient(135deg, #00ff88, #00cc6a);
    }
    
    .btn-primary {
        background: linear-gradient(135deg, #00ff88, #00cc6a);
    }
}

/* 打印样式 */
@media print {
    .header,
    .footer,
    .btn,
    .floating-feature {
        display: none;
    }
    
    .main-content {
        margin-top: 0;
    }
    
    body {
        background: white;
        color: black;
    }
    
    .hero-title,
    .section-title {
        color: black;
    }
}

/* Feature Detail响应式设计 */
@media (max-width: 768px) {
    .feature-detail {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .feature-content,
    .feature-visual {
        min-height: auto;
    }
    
    .feature-content {
        order: 1;
    }
    
    .feature-visual {
        order: 2;
    }
}