/* 移动端Header重新设计 - 简洁现代风格 */

/* 移动端Header基础样式 */
@media screen and (max-width: 768px) {
    /* Header容器 */
    header {
        position: fixed !important;
        top: 0 !important;
        left: 0 !important;
        right: 0 !important;
        z-index: 1000 !important;
        background: #ffffff !important;
        box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1) !important;
        height: 60px !important;
        border-bottom: 1px solid rgba(0, 0, 0, 0.05) !important;
    }
    
    header .container {
        height: 60px !important;
        padding: 0 15px !important;
        display: flex !important;
        align-items: center !important;
        justify-content: space-between !important;
        max-width: 100% !important;
        margin: 0 !important;
    }
    
    /* 左侧Logo区域 */
    .logo {
        display: flex !important;
        align-items: center !important;
        height: 100% !important;
        margin: 0 !important;
        flex: 1 !important;
    }
    
    .logo a {
        display: flex !important;
        align-items: center !important;
        text-decoration: none !important;
        height: 40px !important;
        overflow: hidden !important;
    }
    
    .logo-img {
        height: 32px !important;
        width: auto !important;
        margin-right: 10px !important;
        object-fit: contain !important;
        flex-shrink: 0 !important;
    }
    
    .logo h1 {
        font-size: 0.9rem !important;
        font-weight: 600 !important;
        color: #0066cc !important;
        margin: 0 !important;
        line-height: 1.2 !important;
        white-space: nowrap !important;
        overflow: hidden !important;
        text-overflow: ellipsis !important;
        max-width: 200px !important;
    }
    
    /* 右侧汉堡菜单按钮 */
    .mobile-menu-toggle {
        width: 44px !important;
        height: 44px !important;
        background: none !important;
        border: none !important;
        cursor: pointer !important;
        display: flex !important;
        flex-direction: column !important;
        justify-content: center !important;
        align-items: center !important;
        padding: 10px !important;
        border-radius: 6px !important;
        transition: all 0.3s ease !important;
        position: relative !important;
        flex-shrink: 0 !important;
    }
    
    .mobile-menu-toggle:hover {
        background: rgba(0, 102, 204, 0.1) !important;
    }
    
    .mobile-menu-toggle:active {
        background: rgba(0, 102, 204, 0.2) !important;
        transform: scale(0.95) !important;
    }
    
    /* 汉堡菜单三条线 */
    .mobile-menu-toggle span {
        width: 20px !important;
        height: 2px !important;
        background: #333 !important;
        margin: 2px 0 !important;
        transition: all 0.3s ease !important;
        border-radius: 1px !important;
        display: block !important;
        transform-origin: center !important;
    }
    
    /* 菜单激活状态 - 三条线变成X */
    .mobile-menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px) !important;
        background: #0066cc !important;
    }
    
    .mobile-menu-toggle.active span:nth-child(2) {
        opacity: 0 !important;
        transform: rotate(0deg) scale(0.2, 0.2) !important;
    }
    
    .mobile-menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px) !important;
        background: #0066cc !important;
    }
    
    /* 下拉菜单容器 */
    nav {
        position: fixed !important;
        top: 60px !important;
        left: 0 !important;
        right: 0 !important;
        background: #ffffff !important;
        transform: translateY(-100%) !important;
        opacity: 0 !important;
        visibility: hidden !important;
        transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94) !important;
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1) !important;
        z-index: 999 !important;
        max-height: calc(100vh - 60px) !important;
        overflow-y: auto !important;
    }
    
    /* 菜单打开状态 */
    nav.mobile-menu-open {
        transform: translateY(0) !important;
        opacity: 1 !important;
        visibility: visible !important;
    }
    
    /* 菜单列表 */
    nav ul {
        list-style: none !important;
        margin: 0 !important;
        padding: 20px 0 !important;
        display: flex !important;
        flex-direction: column !important;
        gap: 0 !important;
    }
    
    nav li {
        margin: 0 !important;
        padding: 0 !important;
    }
    
    /* 菜单项链接 */
    nav a {
        display: block !important;
        padding: 16px 20px !important;
        color: #333 !important;
        text-decoration: none !important;
        font-size: 1.1rem !important;
        font-weight: 500 !important;
        transition: all 0.3s ease !important;
        border-left: 4px solid transparent !important;
        position: relative !important;
        min-height: 44px !important;
        display: flex !important;
        align-items: center !important;
    }
    
    /* 菜单项悬停效果 */
    nav a:hover,
    nav a.active {
        background: linear-gradient(90deg, rgba(0, 102, 204, 0.08) 0%, rgba(0, 102, 204, 0.02) 100%) !important;
        color: #0066cc !important;
        border-left-color: #0066cc !important;
        transform: translateX(5px) !important;
    }
    
    /* 激活状态的菜单项 */
    nav a.active {
        background: linear-gradient(90deg, rgba(0, 102, 204, 0.12) 0%, rgba(0, 102, 204, 0.04) 100%) !important;
        font-weight: 600 !important;
    }
    
    /* 菜单项图标（可选） */
    nav a::before {
        content: '';
        width: 6px !important;
        height: 6px !important;
        background: transparent !important;
        border-radius: 50% !important;
        margin-right: 12px !important;
        transition: all 0.3s ease !important;
    }
    
    nav a.active::before {
        background: #0066cc !important;
    }
    
    /* 为body添加顶部间距，避免被固定header遮挡 */
    body {
        padding-top: 60px !important;
    }
}

/* 中等屏幕优化 */
@media screen and (max-width: 480px) {
    header {
        height: 56px !important;
    }
    
    header .container {
        height: 56px !important;
        padding: 0 12px !important;
    }
    
    .logo-img {
        height: 28px !important;
        margin-right: 8px !important;
    }
    
    .logo h1 {
        font-size: 0.85rem !important;
        max-width: 160px !important;
    }
    
    .mobile-menu-toggle {
        width: 40px !important;
        height: 40px !important;
        padding: 8px !important;
    }
    
    .mobile-menu-toggle span {
        width: 18px !important;
    }
    
    nav {
        top: 56px !important;
        max-height: calc(100vh - 56px) !important;
    }
    
    nav a {
        padding: 14px 16px !important;
        font-size: 1rem !important;
    }
    
    body {
        padding-top: 56px !important;
    }
}

/* 小屏幕优化 */
@media screen and (max-width: 360px) {
    header {
        height: 52px !important;
    }
    
    header .container {
        height: 52px !important;
        padding: 0 10px !important;
    }
    
    .logo-img {
        height: 26px !important;
        margin-right: 6px !important;
    }
    
    .logo h1 {
        font-size: 0.8rem !important;
        max-width: 140px !important;
    }
    
    .mobile-menu-toggle {
        width: 36px !important;
        height: 36px !important;
        padding: 6px !important;
    }
    
    .mobile-menu-toggle span {
        width: 16px !important;
        margin: 1.5px 0 !important;
    }
    
    nav {
        top: 52px !important;
        max-height: calc(100vh - 52px) !important;
    }
    
    nav ul {
        padding: 16px 0 !important;
    }
    
    nav a {
        padding: 12px 14px !important;
        font-size: 0.95rem !important;
    }
    
    body {
        padding-top: 52px !important;
    }
}

/* 横屏手机优化 */
@media screen and (max-width: 768px) and (orientation: landscape) {
    header {
        height: 48px !important;
    }
    
    header .container {
        height: 48px !important;
    }
    
    .logo-img {
        height: 24px !important;
    }
    
    .logo h1 {
        font-size: 0.8rem !important;
    }
    
    .mobile-menu-toggle {
        width: 36px !important;
        height: 36px !important;
    }
    
    nav {
        top: 48px !important;
        max-height: calc(100vh - 48px) !important;
    }
    
    nav ul {
        padding: 12px 0 !important;
    }
    
    nav a {
        padding: 10px 16px !important;
        font-size: 0.9rem !important;
    }
    
    body {
        padding-top: 48px !important;
    }
}

/* 高分辨率屏幕优化 */
@media screen and (max-width: 768px) and (-webkit-min-device-pixel-ratio: 2) {
    .logo-img {
        image-rendering: -webkit-optimize-contrast !important;
        image-rendering: crisp-edges !important;
    }
    
    .mobile-menu-toggle span {
        height: 2px !important;
    }
}

/* 触摸设备优化 */
@media screen and (max-width: 768px) and (pointer: coarse) {
    .mobile-menu-toggle {
        min-width: 44px !important;
        min-height: 44px !important;
    }
    
    nav a {
        min-height: 48px !important;
        padding: 14px 20px !important;
    }
}

/* 暗黑模式支持（可选） */
@media screen and (max-width: 768px) and (prefers-color-scheme: dark) {
    header {
        background: #1a1a1a !important;
        border-bottom-color: rgba(255, 255, 255, 0.1) !important;
    }
    
    .logo h1 {
        color: #ffffff !important;
    }
    
    .mobile-menu-toggle span {
        background: #ffffff !important;
    }
    
    .mobile-menu-toggle.active span {
        background: #0088ff !important;
    }
    
    nav {
        background: #1a1a1a !important;
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3) !important;
    }
    
    nav a {
        color: #ffffff !important;
    }
    
    nav a:hover,
    nav a.active {
        background: linear-gradient(90deg, rgba(0, 136, 255, 0.12) 0%, rgba(0, 136, 255, 0.04) 100%) !important;
        color: #0088ff !important;
        border-left-color: #0088ff !important;
    }
}

/* 性能优化 */
@media screen and (max-width: 768px) {
    /* GPU加速 */
    header,
    nav,
    .mobile-menu-toggle,
    .logo {
        transform: translateZ(0) !important;
        backface-visibility: hidden !important;
    }
    
    /* 减少重绘 */
    .mobile-menu-toggle span {
        will-change: transform !important;
    }
    
    nav {
        will-change: transform, opacity !important;
    }
    
    /* 滚动优化 */
    nav {
        -webkit-overflow-scrolling: touch !important;
    }
}