/**
 * 移动端导航组件样式
 * 参考 zhenxulaw 设计，适配 kmac 网站风格
 * 版本: v2025
 */

/* ==================== 基础样式重构 ==================== */

/* 桌面端和移动端通用工具类 */
.d-none {
    display: none !important;
}

.d-lg-none {
    display: block !important;
}

.d-lg-flex {
    display: none !important;
}

@media (min-width: 1024px) {
    .d-lg-none {
        display: none !important;
    }
    
    .d-lg-flex {
        display: flex !important;
    }
}

/* ==================== Header 布局重构 ==================== */

.header .container {
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: var(--space-4);
    height: 100%;
}

/* 移动端 Header 布局 */
@media (max-width: 1023px) {
    .header .container {
        position: relative;
        display: flex;
        align-items: center;
        justify-content: center;
        padding: 0 var(--space-16); /* 为汉堡菜单留出空间 64px */
    }
    
    /* 汉堡菜单在左侧 - 参考 zhenxulaw 的居中方法 */
    .menu-toggle-container {
        position: absolute;
        left: var(--space-4);
        top: 50%;
        transform: translateY(-50%);
        z-index: 1000;
    }
    
    /* Logo 居中 - 现在由 flex 布局自动居中 */
}

/* 更小屏幕保持一致 */
@media (max-width: 768px) {
    .menu-toggle-container {
        position: absolute;
        left: var(--space-4);
        top: 50%;
        transform: translateY(-50%);
        z-index: 1000;
    }
}

/* ==================== 汉堡菜单按钮样式 ==================== */

.menu-toggle-container {
    display: flex;
    align-items: center;
    justify-content: center;
}

.menu-toggle {
    position: relative;
    z-index: 9999;
    background-color: transparent;
    border: none;
    border-radius: 0;
    cursor: pointer;
    outline: none;
}

/* 汉堡菜单图标容器 */
.menu-icon {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 100%;
    height: 100%;
}

/* 汉堡菜单线条 */
.menu-icon .icon-bar {
    display: block;
    width: 18px;
    height: 2px;
    background-color: var(--color-primary);
    transition: all 0.3s ease;
    transform-origin: center;
}

/* 激活状态的汉堡菜单动画 */
.menu-toggle.active .icon-bar:nth-child(1) {
    transform: rotate(45deg) translate(4px, 4px);
}

.menu-toggle.active .icon-bar:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active .icon-bar:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* 首页透明状态汉堡菜单 */
body.home-page .menu-icon .icon-bar {
    background-color: var(--color-white);
}

/* 首页滚动后汉堡菜单颜色恢复 */
body.home-page .header.header-scrolled .menu-icon .icon-bar {
    background-color: var(--color-primary);
}

/* ==================== 移动端导航菜单样式 ==================== */

.mobile-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(64, 163, 157, 0.97);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    z-index: 8888;
    padding: var(--space-8) var(--space-4) var(--space-4) var(--space-4);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15);
    max-height: 100vh;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    width: 100%;
    transform: translateX(-100%);
    transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    will-change: transform;
}

/* 激活状态显示导航 */
.mobile-nav.active {
    transform: translateX(0);
}

/* ==================== 移动端搜索样式 ==================== */

.mobile-search {
    margin-bottom: var(--space-6);
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: var(--space-3);
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
}

.mobile-search form {
    position: relative;
    display: flex;
    align-items: center;
}

.mobile-search-input {
    width: 100%;
    padding: var(--space-3) var(--space-12) var(--space-3) var(--space-3);
    border: none;
    border-radius: var(--radius-sm);
    background-color: rgba(255, 255, 255, 0.9);
    color: var(--color-text-primary);
    font-size: var(--font-base);
    outline: none;
    transition: all var(--transition-base);
}

.mobile-search-input::placeholder {
    color: var(--color-text-light);
}

.mobile-search-input:focus {
    background-color: var(--color-white);
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.4);
    transform: scale(1.02);
}

.mobile-search-btn {
    position: absolute;
    right: var(--space-3);
    background: none;
    border: none;
    padding: var(--space-2);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

.mobile-search-btn .search-icon {
    width: 18px;
    height: 18px;
    filter: brightness(0) saturate(100%) invert(50%) sepia(0%) saturate(0%) hue-rotate(0deg) brightness(100%) contrast(100%);
}

/* ==================== 移动端导航列表样式 ==================== */

.mobile-nav-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.mobile-nav-list li {
    margin-bottom: var(--space-2);
    border-radius: var(--space-2);
    overflow: hidden;
    position: relative;
}

.mobile-nav-list li:last-child {
    margin-bottom: 0;
}

.mobile-nav-list a {
    color: rgba(255, 255, 255, 0.9);
    padding: var(--space-4) var(--space-5);
    display: block;
    text-decoration: none;
    font-size: var(--font-lg);
    font-weight: 500;
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    position: relative;
    border-radius: var(--space-2);
}

.mobile-nav-list li.nav-active > a {
    color: var(--color-white);
    font-weight: 700;
    background: linear-gradient(90deg, 
        rgba(255, 255, 255, 0.25) 0%, 
        rgba(255, 255, 255, 0.15) 100%);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    transform: translateX(var(--space-2));
}

.mobile-nav-list a:hover {
    color: var(--color-white);
    background: rgba(255, 255, 255, 0.1);
    transform: translateX(var(--space-1));
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.mobile-nav-list li.nav-active > a:hover {
    background: linear-gradient(90deg, 
        rgba(255, 255, 255, 0.3) 0%, 
        rgba(255, 255, 255, 0.2) 100%);
    transform: translateX(var(--space-2));
}

/* ==================== 遮罩层样式 ==================== */

.nav-overlay {
    position: fixed;
    top: var(--header-height-mobile);
    left: 0;
    width: 100%;
    height: calc(100% - var(--header-height));
    background: linear-gradient(135deg, 
        rgba(0, 0, 0, 0.4) 0%, 
        rgba(0, 0, 0, 0.6) 100%);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    z-index: 8887;
    opacity: 0;
    visibility: hidden;
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* 桌面端遮罩层调整 */
@media (min-width: 1024px) {
    .nav-overlay {
        top: var(--header-height);
        height: calc(100% - var(--header-height));
    }
}

.nav-overlay.show {
    opacity: 1;
    visibility: visible;
}

/* ==================== 特殊状态处理 ==================== */

/* 阻止背景滚动 */
body.nav-open {
    overflow: hidden;
}

/* 高对比度模式适配 */
@media (prefers-contrast: high) {
    .mobile-nav {
        background-color: var(--color-black);
        border: 2px solid var(--color-white);
    }
    
    .mobile-nav-list a {
        border-bottom: 1px solid var(--color-white);
    }
    
    .menu-icon .icon-bar {
        background-color: var(--color-white) !important;
    }
}

/* 减少动画模式 */
@media (prefers-reduced-motion: reduce) {
    .mobile-nav,
    .menu-icon .icon-bar,
    .nav-overlay {
        transition: none;
    }
    
    .menu-toggle.active .icon-bar:nth-child(1),
    .menu-toggle.active .icon-bar:nth-child(3) {
        transform: none;
    }
    
    .menu-toggle.active .icon-bar:nth-child(2) {
        opacity: 1;
    }
}

/* ==================== 桌面端导航调整 ==================== */

@media (min-width: 1024px) {
    /* 确保桌面端导航正常显示 */
    .header .nav-list {
        order: 2;
    }
    
    .header .header-search {
        order: 3;
    }
    
    .header .logo {
        order: 1;
        justify-self: start;
    }
    
    /* 隐藏移动端相关元素 */
    .mobile-nav,
    .nav-overlay {
        display: none !important;
    }
}

/* ==================== 小屏优化 ==================== */

@media (max-width: 480px) {
    
    .mobile-search {
        margin-bottom: var(--space-4);
    }
    
    .mobile-nav-list a {
        padding: var(--space-3) var(--space-4);
        font-size: var(--font-base);
    }
    
    .mobile-nav-list li.nav-active > a,
    .mobile-nav-list a:hover {
        transform: translateX(var(--space-1));
    }
}

/* ==================== 焦点管理 ==================== */

.menu-toggle:focus {
    outline: none;
}

.menu-toggle:focus-visible {
    outline: 2px solid var(--color-accent-yellow);
    outline-offset: 2px;
}

.mobile-nav-list a:focus {
    outline: 2px solid var(--color-accent-yellow);
    outline-offset: -2px;
    background-color: rgba(255, 255, 255, 0.1);
}

.mobile-search-input:focus {
    outline: 2px solid var(--color-accent-yellow);
    outline-offset: 2px;
}