/**
 * 移动端导航样式 V2.0
 * 采用现代CSS架构，彻底解决兼容性问题
 * 作者：AI助手
 * 版本：2.0.0
 */

/* ===== 基础变量定义 ===== */
:root {
    --mobile-nav-bg: rgba(255, 255, 255, 0.98);
    --mobile-nav-shadow: 0 8px 32px rgba(0, 0, 0, 0.15);
    --mobile-nav-border: 1px solid rgba(0, 0, 0, 0.08);
    --mobile-text-primary: #333333;
    --mobile-text-secondary: #666666;
    --mobile-accent: #667eea;
    --mobile-accent-hover: #5a6fd8;
    --mobile-transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --mobile-border-radius: 16px;
    --mobile-spacing: 20px;
}

/* ===== 移动端导航容器 ===== */
.mobile-nav-v2 {
    position: fixed;
    top: 0;
    left: 0;
    width: 75%;
    max-width: 320px;
    min-width: 280px;
    height: 100vh;
    background: var(--mobile-nav-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    z-index: 1001;
    transform: translateX(-100%);
    transition: transform var(--mobile-transition);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    display: flex;
    flex-direction: column;
    box-shadow: var(--mobile-nav-shadow);
}

.mobile-nav-v2.active {
    transform: translateX(0);
}

/* ===== 移动端导航头部 ===== */
.mobile-nav-header-v2 {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--mobile-spacing);
    border-bottom: var(--mobile-nav-border);
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 2;
}

/* Logo区域 */
.mobile-nav-logo-v2 {
    display: flex;
    align-items: center;
    gap: 12px;
}

.mobile-logo-img-v2 {
    width: 100px;
    object-fit: contain;
}

.mobile-logo-text-v2 {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.mobile-company-name-v2 {
    font-size: 18px;
    font-weight: 700;
    color: var(--mobile-text-primary);
}

.mobile-company-en-v2 {
    font-size: 10px;
    color: var(--mobile-text-secondary);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* 关闭按钮 */
.mobile-close-btn-v2 {
    width: 44px;
    height: 44px;
    border: none;
    background: rgba(0, 0, 0, 0.05);
    border-radius: 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--mobile-text-primary);
    transition: all var(--mobile-transition);
    flex-shrink: 0;
}

.mobile-close-btn-v2:hover {
    background: rgba(0, 0, 0, 0.1);
    transform: scale(1.05);
}

.mobile-close-btn-v2:active {
    transform: scale(0.95);
}

/* ===== 移动端导航内容 ===== */
.mobile-nav-content-v2 {
    flex: 1;
    padding: var(--mobile-spacing);
    display: flex;
    flex-direction: column;
    gap: 8px;
}

/* 导航链接 */
.mobile-nav-link-v2 {
    display: flex;
    align-items: center;
    padding: 16px 20px;
    color: var(--mobile-text-primary);
    text-decoration: none;
    font-size: 16px;
    font-weight: 500;
    border-radius: 12px;
    transition: all var(--mobile-transition);
    background: transparent;
    border: none;
    cursor: pointer;
    text-align: left;
    width: 100%;
    box-sizing: border-box;
}

.mobile-nav-link-v2:hover {
    background: rgba(102, 126, 234, 0.1);
    color: var(--mobile-accent);
    transform: translateX(8px);
}

.mobile-nav-link-v2:active {
    background: rgba(102, 126, 234, 0.15);
    transform: translateX(4px);
}

/* 移动端联系我们按钮 */
.mobile-contact-btn-v2 {
    display: block !important;
    width: 100% !important;
    padding: 16px 24px !important;
    margin: 20px 0 0 0 !important;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%) !important;
    color: white !important;
    text-decoration: none !important;
    border-radius: 12px !important;
    font-weight: 600 !important;
    font-size: 16px !important;
    text-align: center !important;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3) !important;
    transition: all 0.3s ease !important;
    position: relative !important;
    overflow: hidden !important;
}

.mobile-contact-btn-v2::before {
    content: '' !important;
    position: absolute !important;
    top: 0 !important;
    left: -100% !important;
    width: 100% !important;
    height: 100% !important;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent) !important;
    transition: left 0.5s ease !important;
}

.mobile-contact-btn-v2:hover::before,
.mobile-contact-btn-v2:active::before {
    left: 100% !important;
}

.mobile-contact-btn-v2:hover,
.mobile-contact-btn-v2:active {
    transform: translateY(-2px) !important;
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4) !important;
    background: linear-gradient(135deg, #5a6fd8 0%, #6a4190 100%) !important;
}

/* ===== 遮罩层 ===== */
.mobile-nav-overlay-v2 {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all var(--mobile-transition);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}

.mobile-nav-overlay-v2.active {
    opacity: 1;
    visibility: visible;
}

/* ===== 汉堡菜单激活状态 - 已移至navbar-optimization.css ===== */
/* .hamburger.active .bar:nth-child(1) {
    transform: rotate(-45deg) translate(-5px, 6px);
}

.hamburger.active .bar:nth-child(2) {
    opacity: 0;
    transform: scale(0);
}

.hamburger.active .bar:nth-child(3) {
    transform: rotate(45deg) translate(-5px, -6px);
} */

/* ===== 响应式设计 ===== */
@media (max-width: 480px) {
    .mobile-nav-v2 {
        width: 260px;
        max-width: 90vw;
    }
    
    .mobile-nav-header-v2 {
        padding: 16px;
    }
    
    .mobile-nav-content-v2 {
        padding: 16px;
    }
    
    .mobile-nav-link-v2 {
        padding: 14px 16px;
        font-size: 15px;
    }
    
    .mobile-company-name-v2 {
        font-size: 16px;
    }
    
    .mobile-company-en-v2 {
        font-size: 9px;
    }
}

@media (min-width: 481px) and (max-width: 768px) {
    .mobile-nav-v2 {
        width: 280px;
        max-width: 85vw;
    }
    
    .mobile-nav-header-v2 {
        padding: 18px;
    }
    
    .mobile-nav-content-v2 {
        padding: 18px;
    }
    
    .mobile-nav-link-v2 {
        padding: 15px 18px;
        font-size: 16px;
    }
}

@media (min-width: 769px) and (max-width: 1024px) {
    .mobile-nav-v2 {
        width: 300px;
        max-width: 80vw;
    }
    
    .mobile-nav-header-v2 {
        padding: 20px;
    }
    
    .mobile-nav-content-v2 {
        padding: 20px;
    }
    
    .mobile-nav-link-v2 {
        padding: 16px 20px;
        font-size: 17px;
    }
}

/* ===== 触摸设备优化 ===== */
@media (hover: none) and (pointer: coarse) {
    .mobile-nav-link-v2:hover {
        transform: none;
        background: transparent;
    }
    
    .mobile-nav-link-v2:active {
        background: rgba(102, 126, 234, 0.1);
        transform: translateX(4px);
    }
    
    .mobile-close-btn-v2:hover {
        background: rgba(0, 0, 0, 0.05);
        transform: none;
    }
    
    .mobile-close-btn-v2:active {
        background: rgba(0, 0, 0, 0.1);
        transform: scale(0.95);
    }
}

/* 移动端联系我们按钮触摸优化 */
@media (hover: none) and (pointer: coarse) {
    .mobile-contact-btn-v2:hover {
        transform: none !important;
        box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3) !important;
    }
    
    .mobile-contact-btn-v2:active {
        transform: scale(0.98) !important;
        box-shadow: 0 2px 10px rgba(102, 126, 234, 0.4) !important;
    }
}

/* ===== 高DPI屏幕优化 ===== */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .mobile-nav-v2 {
        border: 0.5px solid rgba(0, 0, 0, 0.08);
    }
    
    .mobile-nav-header-v2 {
        border-bottom: 0.5px solid rgba(0, 0, 0, 0.08);
    }
}

/* ===== 横屏模式优化 ===== */
@media (orientation: landscape) and (max-height: 500px) {
    .mobile-nav-header-v2 {
        padding: 12px var(--mobile-spacing);
    }
    
    .mobile-nav-content-v2 {
        padding: 12px var(--mobile-spacing);
    }
    
    .mobile-nav-link-v2 {
        padding: 12px 20px;
    }
}

/* ===== 动画关键帧 ===== */
@keyframes slideInFromLeft {
    from {
        transform: translateX(-100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes slideOutToLeft {
    from {
        transform: translateX(0);
        opacity: 1;
    }
    to {
        transform: translateX(-100%);
        opacity: 0;
    }
}

/* ===== 无障碍支持 ===== */
@media (prefers-reduced-motion: reduce) {
    .mobile-nav-v2,
    .mobile-nav-overlay-v2,
    .mobile-nav-link-v2,
    .mobile-close-btn-v2 {
        transition: none;
    }
}

/* ===== 打印样式 ===== */
@media print {
    .mobile-nav-v2,
    .mobile-nav-overlay-v2 {
        display: none !important;
    }
}

/* ===== 响应式宽度调整 ===== */

/* 小屏手机 (480px以下) */
@media (max-width: 480px) {
    .mobile-nav-v2 {
        width: 80% !important;
        max-width: 300px !important;
        min-width: 260px !important;
    }
}

/* 超小屏手机 (360px以下) */
@media (max-width: 360px) {
    .mobile-nav-v2 {
        width: 85% !important;
        max-width: 280px !important;
        min-width: 240px !important;
    }
}

/* 大屏手机 (768px以上) */
@media (min-width: 768px) {
    .mobile-nav-v2 {
        width: 70% !important;
        max-width: 350px !important;
        min-width: 300px !important;
    }
}