/**
 * Yitu Bottom Navigation - Frontend Styles
 * Version: 1.0.0
 * 参考设计：SHEIN电商应用风格
 */

/* CSS变量定义 */
:root {
    --yitu-nav-height: 60px;
    --yitu-nav-bg: #ffffff;
    --yitu-nav-text: #666666;
    --yitu-nav-active: #fed700;
    --yitu-nav-active-dark: #e5c200;
    --yitu-nav-special: #9333ea;
    --yitu-icon-size: 20px;
    --yitu-label-size: 10px;
    --yitu-nav-shadow: 0 -2px 8px rgba(0, 0, 0, 0.06);
    --yitu-nav-radius: 0;
    --yitu-animation-duration: 0.3s;
    --yitu-cart-count-bgcolor: #ff3838;
    --yitu-nav-wrapper-padding: 0 4px;
    --yitu-icon-label-gap: 4px;
}

/* ============================================
   底部导航栏主容器
   ============================================ */
.yitu-bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: var(--yitu-nav-height);
    background: var(--yitu-nav-bg);
    box-shadow: var(--yitu-nav-shadow);
    display: flex;
    justify-content: space-around;
    align-items: center;
    z-index: 9999;
    padding: var(--yitu-nav-wrapper-padding);
    box-sizing: border-box;
    transition: transform var(--yitu-animation-duration) ease;
    border-radius: var(--yitu-nav-radius) var(--yitu-nav-radius) 0 0;
    border-top: 1px solid rgba(0, 0, 0, 0.05);
}

/* 隐藏状态 */
.yitu-bottom-nav.hidden {
    transform: translateY(100%);
}

/* 入场动画 */
@keyframes yituSlideInUp {
    from {
        transform: translateY(100%);
        opacity: 0;
    }

    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.yitu-bottom-nav {
    animation: yituSlideInUp 0.4s ease-out;
}

/* ============================================
   导航项样式
   ============================================ */
.yitu-nav-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    position: relative;
    cursor: pointer;
    padding: 6px 4px;
    text-decoration: none;
    color: var(--yitu-nav-text);
    transition: all var(--yitu-animation-duration) ease;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
    user-select: none;
    min-width: 0;
    background: none;
    border: none;
    outline: none;
    font-family: inherit;
}

/* 按钮类型导航项特殊处理 */
button.yitu-nav-item {
    background: transparent !important;
    border: none !important;
    color: var(--yitu-nav-text) !important;
    font-size: inherit;
    line-height: inherit;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
}

button.yitu-nav-item .yitu-nav-icon {
    color: var(--yitu-nav-text) !important;
}

button.yitu-nav-item .yitu-nav-label {
    color: var(--yitu-nav-text) !important;
}

/* 导航项悬停效果（桌面端） */
@media (hover: hover) {
    .yitu-nav-item:hover .yitu-nav-icon {
        transform: translateY(-2px) scale(1.1);
        color: var(--yitu-nav-active) !important;
    }

    .yitu-nav-item:hover .yitu-nav-label {
        color: var(--yitu-nav-active) !important;
    }

    /* 确保按钮 hover 效果 */
    button.yitu-nav-item:hover .yitu-nav-icon {
        color: var(--yitu-nav-active) !important;
    }

    button.yitu-nav-item:hover .yitu-nav-label {
        color: var(--yitu-nav-active) !important;
    }
}

/* 导航项点击效果 */
.yitu-nav-item:active {
    transform: scale(0.95);
    background-color: rgba(0, 0, 0, 0.05);
    border-radius: 8px;
}

/* 点击波纹效果 */
.yitu-nav-item::after {
    content: '';
    position: absolute;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(254, 215, 0, 0.2);
    transform: scale(0);
    opacity: 0;
    transition: transform 0.3s, opacity 0.3s;
    pointer-events: none;
}

.yitu-nav-item:active::after {
    transform: scale(2);
    opacity: 1;
    transition: transform 0.1s, opacity 0.1s;
}

/* 激活状态 */
.yitu-nav-item.active {
    position: relative;
}

.yitu-nav-item.active::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 24px;
    height: 3px;
    background: var(--yitu-nav-active);
    border-radius: 3px 3px 0 0;
    transition: all var(--yitu-animation-duration) ease;
    z-index: 10;
}

/* 确保按钮激活状态的指示条也显示 */
button.yitu-nav-item.active::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 24px;
    height: 3px;
    background: var(--yitu-nav-active) !important;
    border-radius: 3px 3px 0 0;
    z-index: 10;
}

.yitu-nav-item.active .yitu-nav-icon {
    color: var(--yitu-nav-active) !important;
    transform: translateY(-2px) scale(1.05);
}

.yitu-nav-item.active .yitu-nav-label {
    color: var(--yitu-nav-active) !important;
    font-weight: 600;
}

/* 按钮激活状态 */
button.yitu-nav-item.active .yitu-nav-icon {
    color: var(--yitu-nav-active) !important;
}

button.yitu-nav-item.active .yitu-nav-label {
    color: var(--yitu-nav-active) !important;
}

/* ============================================
   图标样式
   ============================================ */
.yitu-nav-icon {
    font-size: var(--yitu-icon-size);
    color: var(--yitu-nav-text);
    margin-bottom: var(--yitu-icon-label-gap);
    position: relative;
    transition: all var(--yitu-animation-duration) cubic-bezier(0.68, -0.55, 0.265, 1.55);
    line-height: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* 图标容器（用于徽章定位） */
.yitu-nav-icon-wrapper {
    position: relative;
    display: inline-block;
}

/* SVG图标支持 */
.yitu-svg-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.yitu-svg-icon svg {
    width: var(--yitu-icon-size);
    height: var(--yitu-icon-size);
    fill: currentColor;
}

/* ============================================
   标签文字样式
   ============================================ */
.yitu-nav-label {
    font-size: var(--yitu-label-size);
    color: var(--yitu-nav-text);
    font-weight: 500;
    line-height: 1.3;
    transition: all var(--yitu-animation-duration) ease;
    margin-top: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 100%;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    letter-spacing: 0.2px;
}

/* ============================================
   特殊中间按钮（Trends风格）
   ============================================ */
.yitu-nav-item.special-center {
    position: relative;
}

.yitu-nav-item.special-center .yitu-nav-icon-wrapper {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--yitu-nav-special) 0%, #7c3aed 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--yitu-icon-label-gap);
    box-shadow: 0 3px 10px rgba(147, 51, 234, 0.35);
    transform: translateY(-2px);
    transition: all var(--yitu-animation-duration) ease;
}

.yitu-nav-item.special-center .yitu-nav-icon {
    color: #ffffff !important;
    font-size: calc(var(--yitu-icon-size) + 2px);
    margin: 0;
}

.yitu-nav-item.special-center .yitu-nav-label {
    color: var(--yitu-nav-special);
    font-weight: 600;
    font-size: calc(var(--yitu-label-size) - 0.5px);
}

/* 特殊按钮激活状态 - 使用主题颜色 */
.yitu-nav-item.special-center.active::before {
    width: 32px;
}

.yitu-nav-item.special-center.active .yitu-nav-icon-wrapper {
    background: linear-gradient(135deg, var(--yitu-nav-active) 0%, var(--yitu-nav-active-dark) 100%);
    box-shadow: 0 4px 12px rgba(254, 215, 0, 0.4);
}

.yitu-nav-item.special-center.active .yitu-nav-label {
    color: var(--yitu-nav-active);
}

/* 特殊按钮动画 */
@keyframes yituPulse {
    0% {
        transform: translateY(-2px) scale(1);
    }

    50% {
        transform: translateY(-2px) scale(1.05);
    }

    100% {
        transform: translateY(-2px) scale(1);
    }
}

.yitu-nav-item.special-center .yitu-nav-icon-wrapper {
    animation: yituPulse 2.5s ease-in-out infinite;
}

.yitu-nav-item.special-center:hover .yitu-nav-icon-wrapper {
    transform: translateY(-4px) scale(1.08);
    box-shadow: 0 5px 15px rgba(147, 51, 234, 0.45);
}

/* ============================================
   购物车数量徽章
   ============================================ */
.yitu-cart-count {
    position: absolute;
    top: -8px;
    right: -30px;
    background: linear-gradient(135deg, var(--yitu-cart-count-bgcolor, #ff3838) 0%, #ee5a24 100%);
    color: white;
    font-size: 10px;
    font-weight: 600;
    padding: 2px 4px;
    border-radius: 10px;
    min-width: 16px;
    height: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 4px rgba(238, 90, 36, 0.3);
    border: 1.5px solid var(--yitu-nav-bg);
    box-sizing: border-box;
    z-index: 10;
    /* 确保徽章在图标上方 */
}

/* 数量大于99时 */
.yitu-cart-count.large {
    font-size: 9px;
    padding: 2px 3px;
    min-width: 20px;
}

/* 购物车数量动画 */
@keyframes yituCartBounce {

    0%,
    100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.2);
    }
}

.yitu-cart-count.updated {
    animation: yituCartBounce 0.3s ease;
}

/* ============================================
   购物车总金额
   ============================================ */
.yitu-cart-total {
    font-size: 11px;
    font-weight: 600;
    color: var(--yitu-nav-text);
    line-height: 1.2;
    margin-top: 2px;
    white-space: nowrap;
    transition: all var(--yitu-animation-duration) ease;
}

/* 激活状态下的金额颜色 */
.yitu-nav-item.active .yitu-cart-total {
    color: var(--yitu-nav-active);
}

/* 购物车金额动画 */
.yitu-cart-total.updated {
    animation: yituCartBounce 0.3s ease;
}

/* 购物车项特殊布局：垂直排列 */
.yitu-nav-item[data-type="woo-cart"] {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
}

/* 购物车图标容器：需要相对定位以承载徽章 */
.yitu-nav-item[data-type="woo-cart"] .yitu-nav-icon-wrapper {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ============================================
   分类菜单覆盖层
   ============================================ */
.yitu-category-overlay {
    position: fixed;
    bottom: var(--yitu-nav-height);
    left: 0;
    right: 0;
    background: #ffffff;
    max-height: 60vh;
    overflow-y: auto;
    transform: translateY(calc(100% + var(--yitu-nav-height)));
    transition: transform var(--yitu-animation-duration) cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
    border-radius: 16px 16px 0 0;
    z-index: 9998;
}

.yitu-category-overlay.active {
    transform: translateY(0);
}

/* 分类菜单头部 */
.yitu-category-header {
    position: sticky;
    top: 0;
    background: #ffffff;
    padding: 15px 20px;
    border-bottom: 1px solid #f0f0f0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 1;
}

.yitu-category-header h3 {
    margin: 0;
    font-size: 18px;
    font-weight: 600;
    color: #333;
}

.yitu-close-btn {
    font-size: 24px;
    color: #999;
    cursor: pointer;
    padding: 0 5px;
    transition: color 0.2s;
}

.yitu-close-btn:hover {
    color: #333;
}

/* 分类网格 */
.yitu-category-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    padding: 20px 16px;
}

.yitu-category-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-decoration: none;
    color: #333;
    transition: transform 0.2s;
}

.yitu-category-item:active {
    transform: scale(0.95);
}

.yitu-category-icon {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: #f5f5f5;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 8px;
    overflow: hidden;
    transition: all 0.2s;
}

.yitu-category-item:hover .yitu-category-icon {
    background: #ececec;
    transform: scale(1.05);
}

.yitu-category-icon img {
    width: 36px;
    height: 36px;
    object-fit: cover;
}

.yitu-category-icon i {
    font-size: 24px;
    color: #666;
}

.yitu-category-name {
    font-size: 12px;
    color: #333;
    text-align: center;
    line-height: 1.2;
    max-width: 70px;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

/* ============================================
   搜索覆盖层
   ============================================ */
.yitu-search-overlay {
    position: fixed;
    bottom: var(--yitu-nav-height);
    left: 0;
    right: 0;
    background: white;
    padding: 15px;
    transform: translateY(calc(100% + var(--yitu-nav-height)));
    transition: transform var(--yitu-animation-duration) cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 -5px 15px rgba(0, 0, 0, 0.1);
    z-index: 9998;
}

.yitu-search-overlay.active {
    transform: translateY(0);
}

.yitu-search-wrapper {
    position: relative;
    max-width: 500px;
    margin: 0 auto;
}

.yitu-search-wrapper form {
    display: flex;
    align-items: center;
}

.yitu-search-input {
    width: 100%;
    padding: 12px 45px 12px 20px;
    border: 2px solid #e0e0e0;
    border-radius: 25px;
    font-size: 16px;
    outline: none;
    transition: border-color var(--yitu-animation-duration);
}

.yitu-search-input:focus {
    border-color: var(--yitu-nav-active);
}

.yitu-search-btn {
    position: absolute;
    right: 5px;
    top: 50%;
    transform: translateY(-50%);
    background: var(--yitu-nav-active);
    color: #333;
    border: none;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s;
    font-weight: 600;
}

.yitu-search-btn:hover {
    background: var(--yitu-nav-active-dark);
    transform: translateY(-50%) scale(1.05);
}

/* ============================================
   WhatsApp按钮样式
   ============================================ */
.yitu-whatsapp-btn {
    background: linear-gradient(135deg, #25d366 0%, #128c7e 100%);
}

.yitu-whatsapp-btn .yitu-nav-icon {
    color: white !important;
}

.yitu-whatsapp-btn .yitu-nav-label {
    color: #25d366;
}

/* ============================================
   社交媒体样式
   ============================================ */
.yitu-social-facebook {
    background: #1877f2;
}

.yitu-social-instagram {
    background: linear-gradient(45deg, #f09433 0%, #e6683c 25%,
            #dc2743 50%, #cc2366 75%, #bc1888 100%);
}

.yitu-social-twitter {
    background: #1da1f2;
}

.yitu-social-youtube {
    background: #ff0000;
}

.yitu-social-tiktok {
    background: #000000;
}

/* ============================================
   遮罩层
   ============================================ */
.yitu-nav-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s, visibility 0.3s;
    z-index: 9997;
}

.yitu-nav-backdrop.active {
    opacity: 1;
    visibility: visible;
}

/* ============================================
   响应式设计
   ============================================ */

/* 小屏幕手机 (320px - 375px) */
@media (max-width: 375px) {
    .yitu-bottom-nav {
        padding: 0 5px;
    }

    .yitu-nav-label {
        font-size: 10px;
        max-width: 50px;
    }

    .yitu-nav-icon {
        font-size: 20px;
    }

    .yitu-category-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 12px;
    }
}

/* 平板和桌面设备媒体查询已删除 - 仅使用 User-Agent 判断移动端 */

/* 横屏模式 */
@media (orientation: landscape) and (max-height: 500px) {
    .yitu-bottom-nav {
        height: 48px;
    }

    .yitu-nav-icon {
        font-size: 20px;
    }

    .yitu-nav-label {
        font-size: 10px;
    }

    .yitu-category-overlay {
        max-height: 80vh;
    }
}

/* ============================================
   iOS安全区域适配
   ============================================ */
@supports (padding-bottom: env(safe-area-inset-bottom)) {
    .yitu-bottom-nav {
        padding-bottom: env(safe-area-inset-bottom);
        height: calc(var(--yitu-nav-height) + env(safe-area-inset-bottom));
    }

    .yitu-category-overlay {
        bottom: calc(var(--yitu-nav-height) + env(safe-area-inset-bottom));
    }

    .yitu-search-overlay {
        bottom: calc(var(--yitu-nav-height) + env(safe-area-inset-bottom));
    }
}

/* ============================================
   深色模式支持
   ============================================ */
.yitu-nav-dark .yitu-bottom-nav {
    background: linear-gradient(180deg, #1a1a1a 0%, #000000 100%);
    border-top-color: rgba(255, 255, 255, 0.1);
}

.yitu-nav-dark .yitu-nav-icon,
.yitu-nav-dark .yitu-nav-label {
    color: #8a8a8a;
}

.yitu-nav-dark .yitu-nav-item.active .yitu-nav-icon,
.yitu-nav-dark .yitu-nav-item.active .yitu-nav-label {
    color: var(--yitu-nav-active);
}

.yitu-nav-dark .yitu-nav-item.active::before {
    background: var(--yitu-nav-active);
}

.yitu-nav-dark .yitu-category-overlay,
.yitu-nav-dark .yitu-search-overlay {
    background: #1a1a1a;
    color: #ffffff;
}

.yitu-nav-dark .yitu-category-header {
    background: #1a1a1a;
    border-bottom-color: #333;
}

.yitu-nav-dark .yitu-category-header h3,
.yitu-nav-dark .yitu-category-name {
    color: #ffffff;
}

.yitu-nav-dark .yitu-category-icon {
    background: #2a2a2a;
}

.yitu-nav-dark .yitu-search-input {
    background: #2a2a2a;
    border-color: #444;
    color: #ffffff;
}

/* ============================================
   加载动画
   ============================================ */
.yitu-loading {
    position: relative;
}

.yitu-loading::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid #f3f3f3;
    border-top: 2px solid var(--yitu-nav-active);
    border-radius: 50%;
    animation: yituSpin 1s linear infinite;
}

@keyframes yituSpin {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}

/* ============================================
   辅助功能
   ============================================ */

/* 隐藏标签时的样式调整 */
body.yitu-hide-labels .yitu-nav-label {
    display: none;
}

body.yitu-hide-labels .yitu-nav-icon {
    margin-bottom: 0;
    font-size: calc(var(--yitu-icon-size) + 4px);
}

/* 打印时隐藏 */
@media print {

    .yitu-bottom-nav,
    .yitu-category-overlay,
    .yitu-search-overlay,
    .yitu-nav-backdrop {
        display: none !important;
    }
}

/* 无障碍支持 */
.yitu-nav-item:focus {
    outline: 2px solid var(--yitu-nav-active);
    outline-offset: 2px;
}

.yitu-nav-item:focus:not(:focus-visible) {
    outline: none;
}

/* 减少动画（用户偏好） */
@media (prefers-reduced-motion: reduce) {

    .yitu-bottom-nav,
    .yitu-nav-item,
    .yitu-nav-icon,
    .yitu-category-overlay,
    .yitu-search-overlay {
        transition: none;
        animation: none;
    }
}