/* ============================================================
   HOFUTECH UI Enhancements
   厚孚技术官网前台界面优化增强样式
   保持现有设计语言与色彩体系不变，仅添加动画与交互增强
   ============================================================ */

/* --- 1. Navigation Link Underline (中心向两端展开 + 渐变) --- */
.nav-menu > a:after,
.nav-item .nav-link:after {
    left: 50% !important;
    width: 0 !important;
    height: 2.5px !important;
    background: linear-gradient(90deg, #f39c12, #e67e22) !important;
    border-radius: 2px !important;
    transition: width 0.4s cubic-bezier(0.16, 1, 0.3, 1),
                left 0.4s cubic-bezier(0.16, 1, 0.3, 1) !important;
}

.nav-menu > a:hover:after,
.nav-item .nav-link:hover:after {
    width: 100% !important;
    left: 0 !important;
}

.language-switcher a:after {
    display: none !important;
}

.nav-menu > a.active,
.nav-item > .nav-link.active {
    color: #004e92 !important;
    font-weight: 600 !important;
}

.language-switcher a.active {
    color: #fff !important;
    background-color: #004e92 !important;
    border-color: #004e92 !important;
}

.nav-menu > a:hover,
.nav-item > .nav-link:hover {
    color: var(--primary-blue) !important;
    transform: translateY(-1px);
    transition: color 0.3s ease, transform 0.3s ease;
}

.language-switcher a:hover {
    transform: none !important;
}

/* --- 2. Card Component (渐变边框 + 增强阴影 + 标题变色) --- */
.card,
.product-card,
.solution-card,
.service-card,
.news-item {
    border: 1px solid transparent;
    position: relative;
}

.card::before,
.product-card::before,
.solution-card::before,
.service-card::before,
.news-item::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    padding: 1.5px;
    background: linear-gradient(135deg, transparent, transparent);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    transition: background 0.4s ease;
    pointer-events: none;
    z-index: 1;
}

.card:hover::before,
.product-card:hover::before,
.solution-card:hover::before,
.service-card:hover::before,
.news-item:hover::before {
    background: linear-gradient(135deg, var(--light-blue), var(--accent-orange));
}

.card:hover,
.product-card:hover,
.solution-card:hover,
.service-card:hover,
.news-item:hover {
    transform: translateY(-6px) !important;
    box-shadow: 0 12px 28px rgba(0, 78, 146, 0.12), 0 4px 12px rgba(0, 0, 0, 0.04) !important;
    border-color: transparent !important;
}

.card:hover .card-title,
.product-card:hover .product-name,
.solution-card:hover .solution-name,
.service-card:hover .service-title,
.news-item:hover .news-title {
    color: var(--primary-blue);
    transition: color 0.3s ease;
}

.card .card-body,
.product-card .product-info,
.solution-card .solution-info,
.service-card .service-info,
.news-item .news-info {
    transition: background-color 0.4s ease;
}

/* --- 3. Scroll Reveal Animation (滚动揭示动画) --- */
.scroll-reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease-out, transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.scroll-reveal.revealed {
    opacity: 1;
    transform: translateY(0);
}

.scroll-reveal[data-delay="1"] { transition-delay: 0.1s; }
.scroll-reveal[data-delay="2"] { transition-delay: 0.2s; }
.scroll-reveal[data-delay="3"] { transition-delay: 0.3s; }
.scroll-reveal[data-delay="4"] { transition-delay: 0.4s; }
.scroll-reveal[data-delay="5"] { transition-delay: 0.5s; }

/* --- 4. Tag / Badge (胶囊形状 + 渐变 + 脉冲光晕) --- */
.tag-new,
.product-tag {
    border-radius: 20px !important;
    padding: 4px 12px !important;
    font-size: 11px !important;
    font-weight: 600 !important;
    letter-spacing: 0.5px;
}

.tag-new {
    background: linear-gradient(135deg, #f39c12, #e67e22) !important;
    box-shadow: 0 2px 8px rgba(243, 156, 18, 0.35);
    animation: tagPulse 2s ease-in-out infinite;
}

.product-tag.HOT {
    background: linear-gradient(135deg, #f39c12, #e67e22) !important;
    box-shadow: 0 2px 8px rgba(243, 156, 18, 0.35);
    animation: tagPulse 2s ease-in-out infinite;
}

@keyframes tagPulse {
    0%, 100% { box-shadow: 0 2px 8px rgba(243, 156, 18, 0.35); }
    50% { box-shadow: 0 2px 16px rgba(243, 156, 18, 0.55); }
}

/* --- 5. Back to Top Button (涟漪环动画 + 弹簧悬停) --- */
.back-to-top {
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1) !important;
    position: relative;
}

.back-to-top::after {
    content: '';
    position: absolute;
    inset: -3px;
    border-radius: 50%;
    border: 2px solid rgba(0, 123, 255, 0.3);
    animation: bttRipple 2s ease-out infinite;
    pointer-events: none;
}

@keyframes bttRipple {
    0% { transform: scale(1); opacity: 0.6; }
    100% { transform: scale(1.4); opacity: 0; }
}

.back-to-top:hover {
    transform: translateY(-5px) scale(1.05) !important;
    box-shadow: 0 8px 24px rgba(0, 78, 146, 0.4) !important;
}

.back-to-top:active {
    transform: scale(0.95) !important;
}

/* --- 6. Form Input (聚焦上浮 + 光晕 + 有效状态变色) --- */
.form-group input,
.form-group textarea {
    border-radius: 8px !important;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1) !important;
    border: 1.5px solid #e0e0e0 !important;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--light-blue) !important;
    box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.12), 0 4px 12px rgba(0, 123, 255, 0.08) !important;
    transform: translateY(-1px);
}

.form-group input:not(:placeholder-shown):valid,
.form-group textarea:not(:placeholder-shown):valid {
    border-color: #52c41a !important;
}

/* --- 7. Pagination (渐变活跃态 + 悬停上浮) --- */
.pagination-btn {
    border-radius: 8px !important;
    font-weight: 500 !important;
    border: 1.5px solid #e8e8e8 !important;
    transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1) !important;
}

.pagination-btn:hover {
    border-color: var(--light-blue) !important;
    color: var(--light-blue) !important;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 123, 255, 0.15);
    background: #fff !important;
}

.pagination-btn.active {
    background: linear-gradient(135deg, #004e92, #007bff) !important;
    color: #fff !important;
    border-color: transparent !important;
    box-shadow: 0 4px 12px rgba(0, 78, 146, 0.3);
    transform: translateY(-1px);
}

/* --- 8. Footer Link (橙色下划线悬停展开) --- */
.link-column ul li a {
    position: relative;
    padding-bottom: 2px;
    transition: color 0.3s ease;
}

.link-column ul li a::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 0;
    height: 1px;
    background: #f39c12;
    transition: width 0.3s ease;
}

.link-column ul li a:hover {
    color: #fff !important;
    text-decoration: none !important;
}

.link-column ul li a:hover::after {
    width: 100%;
}

/* --- 9. Category Navigation (左侧强调条 + 滑入悬停 + 渐变活跃态) --- */
.category-item,
.industry-item {
    border: none !important;
    border-left: 3px solid transparent !important;
    border-radius: 0 8px 8px 0 !important;
    transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1) !important;
    font-weight: 500 !important;
    border-bottom: 1px solid #f0f0f0 !important;
}

.category-item:hover,
.industry-item:hover {
    background: #fff !important;
    color: var(--primary-blue) !important;
    border-left-color: var(--light-blue) !important;
    transform: translateX(4px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.category-item.active,
.industry-item.active {
    background: linear-gradient(90deg, rgba(0, 78, 146, 0.08), transparent) !important;
    color: var(--primary-blue) !important;
    border-left-color: var(--accent-orange) !important;
    font-weight: 600 !important;
}

/* --- 10. Loading Skeleton (微光扫过动画) --- */
.skeleton-line {
    height: 14px;
    border-radius: 4px;
    margin-bottom: 8px;
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s ease-in-out infinite;
}

.skeleton-line:last-child {
    width: 60%;
}

@keyframes shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.skeleton-card {
    background: #fff;
    border: 1px solid #f0f0f0;
    border-radius: 8px;
    padding: 16px;
    overflow: hidden;
}

.skeleton-card .skeleton-img {
    height: 140px;
    border-radius: 6px;
    margin-bottom: 12px;
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s ease-in-out infinite;
}

/* --- 11. Contact Card (顶部强调条 + 图标缩放 + 边框光晕) --- */
.contact-card {
    border-radius: 12px !important;
    border: 1px solid rgba(0, 78, 146, 0.08) !important;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1) !important;
    position: relative;
    overflow: hidden;
}

.contact-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, #004e92, #007bff);
    transform: scaleX(0);
    transition: transform 0.4s ease;
    transform-origin: left;
}

.contact-card:hover::before {
    transform: scaleX(1);
}

.contact-card:hover {
    transform: translateY(-4px) !important;
    box-shadow: 0 8px 24px rgba(0, 78, 146, 0.12) !important;
    border-color: rgba(0, 78, 146, 0.15) !important;
}

.contact-card .contact-icon {
    transition: transform 0.3s ease;
}

.contact-card:hover .contact-icon {
    transform: scale(1.15);
}

/* --- 12. Breadcrumb Navigation (渐变背景 + 蓝色链接 + 下划线悬停) --- */
.breadcrumb {
    background: linear-gradient(90deg, #f8f9fa, #fff) !important;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    padding: 12px 16px !important;
    border-radius: 6px;
}

.breadcrumb a {
    color: var(--light-blue) !important;
    font-weight: 500;
    position: relative;
    transition: color 0.3s ease;
}

.breadcrumb a:hover {
    color: var(--primary-blue) !important;
}

.breadcrumb a::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--primary-blue);
    transition: width 0.3s ease;
}

.breadcrumb a:hover::after {
    width: 100%;
}

/* --- 13. Slider Indicator Dots (活跃点变形为胶囊) --- */
.slider-dot {
    width: 10px !important;
    height: 10px !important;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1) !important;
}

.slider-dot.active {
    background: #f39c12 !important;
    width: 28px !important;
    border-radius: 5px !important;
    box-shadow: 0 0 16px rgba(243, 156, 18, 0.5) !important;
    transform: none !important;
}

/* --- 14. Section Title 渐变下划线动画 --- */
.section-title::before {
    background: linear-gradient(180deg, #f39c12, #e67e22) !important;
    border-radius: 2px;
}

/* --- 全局过渡增强 --- */
.view-more {
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1) !important;
}

.view-more:hover {
    transform: translateY(-1px);
}

/* --- 提交按钮增强 --- */
.submit-btn {
    background: linear-gradient(135deg, #004e92, #007bff) !important;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1) !important;
    position: relative;
    overflow: hidden;
}

.submit-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 60%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.submit-btn:hover::before {
    left: 120%;
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 78, 146, 0.3);
}

.submit-btn:active {
    transform: translateY(0) scale(0.98);
}

/* --- 响应式覆盖：移动端保持原有行为 --- */
@media (max-width: 768px) {
    .nav-menu a:after,
    .nav-item .nav-link:after {
        display: none !important;
    }

    .nav-menu a:hover,
    .nav-item .nav-link:hover {
        transform: none !important;
    }

    .card:hover {
        transform: translateY(-4px) !important;
    }

    .card::before {
        display: none;
    }

    .category-item:hover,
    .industry-item:hover {
        transform: none !important;
    }

    .scroll-reveal {
        opacity: 1 !important;
        transform: none !important;
        transition: none !important;
    }

    .back-to-top::after {
        display: none;
    }

    .slider-dot.active {
        width: 10px !important;
        border-radius: 50% !important;
        transform: scale(1.3) !important;
    }
}

/* --- 15. Dropdown Disabled (产品中心/技术服务/行业应用页面禁用顶部下拉) --- */
.nav-item.dropdown-disabled .dropdown-menu {
    display: none !important;
    opacity: 0 !important;
    visibility: hidden !important;
    pointer-events: none !important;
}

.nav-item.dropdown-disabled .dropdown-arrow {
    display: none;
}

.nav-item.dropdown-disabled:hover .dropdown-menu,
.nav-item.dropdown-disabled.dropdown-open .dropdown-menu {
    display: none !important;
    opacity: 0 !important;
    visibility: hidden !important;
    pointer-events: none !important;
}

.nav-item.dropdown-disabled .nav-link {
    cursor: default;
}

.nav-item.dropdown-disabled .nav-link:hover {
    transform: none !important;
}

/* --- 16. Mobile Drawer Menu (侧边抽屉式菜单优化) --- */
@media (max-width: 768px) {
    .menu-overlay {
        background: rgba(0, 0, 0, 0.45) !important;
        backdrop-filter: blur(4px);
        -webkit-backdrop-filter: blur(4px);
        transition: opacity 0.35s ease !important;
    }

    .menu-overlay.active {
        opacity: 1 !important;
    }

    .nav-menu {
        width: 300px !important;
        left: -310px !important;
        background: #fff !important;
        padding: 0 !important;
        box-shadow: none !important;
        transition: left 0.35s cubic-bezier(0.16, 1, 0.3, 1) !important;
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
    }

    .nav-menu.active {
        left: 0 !important;
        box-shadow: 6px 0 30px rgba(0, 0, 0, 0.15) !important;
    }

    .nav-menu .menu-header {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 20px 24px 16px;
        border-bottom: 1px solid #f0f0f0;
        background: linear-gradient(135deg, #004e92, #007bff);
        color: #fff;
        min-height: 68px;
    }

    .nav-menu .menu-header-title {
        font-size: 18px;
        font-weight: 700;
        letter-spacing: 0.5px;
    }

    .nav-menu .menu-close-btn {
        width: 36px;
        height: 36px;
        border-radius: 50%;
        background: rgba(255, 255, 255, 0.2);
        border: none;
        color: #fff;
        font-size: 20px;
        display: flex;
        align-items: center;
        justify-content: center;
        cursor: pointer;
        transition: background 0.2s ease;
    }

    .nav-menu .menu-close-btn:hover {
        background: rgba(255, 255, 255, 0.3);
    }

    .nav-menu > a {
        padding: 16px 24px !important;
        font-size: 16px !important;
        font-weight: 500 !important;
        border-bottom: 1px solid #f5f5f5 !important;
        color: #333 !important;
        display: flex !important;
        align-items: center;
        transition: background 0.2s ease, color 0.2s ease !important;
    }

    .nav-menu > a:hover,
    .nav-menu > a:active {
        background: rgba(0, 123, 255, 0.06) !important;
        color: var(--primary-blue) !important;
    }

    .nav-menu > a.active {
        color: var(--primary-blue) !important;
        background: rgba(0, 123, 255, 0.08) !important;
        border-right: 3px solid var(--primary-blue) !important;
        font-weight: 600 !important;
    }

    .nav-menu > a:after {
        display: none !important;
    }

    .nav-item {
        width: 100%;
        border-bottom: 1px solid #f5f5f5;
    }

    .nav-item .nav-link {
        padding: 16px 24px !important;
        font-size: 16px !important;
        font-weight: 500 !important;
        color: #333 !important;
        display: flex !important;
        align-items: center;
        justify-content: space-between;
        transition: background 0.2s ease, color 0.2s ease !important;
        width: 100%;
        border-bottom: none !important;
    }

    .nav-item .nav-link:hover,
    .nav-item .nav-link:active {
        background: rgba(0, 123, 255, 0.06) !important;
        color: var(--primary-blue) !important;
    }

    .nav-item .nav-link.active {
        color: var(--primary-blue) !important;
        background: rgba(0, 123, 255, 0.08) !important;
        font-weight: 600 !important;
    }

    .nav-item .nav-link:after {
        display: none !important;
    }

    .nav-item .dropdown-arrow {
        font-size: 12px !important;
        transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1) !important;
        color: #999;
        margin-left: 8px;
    }

    .nav-item.accordion-open .dropdown-arrow {
        transform: rotate(180deg) !important;
        color: var(--primary-blue);
    }

    .nav-item .dropdown-menu {
        position: static !important;
        opacity: 1 !important;
        visibility: visible !important;
        transform: none !important;
        box-shadow: none !important;
        border-radius: 0 !important;
        background: #fafbfc !important;
        max-height: 0 !important;
        overflow: hidden !important;
        transition: max-height 0.35s cubic-bezier(0.16, 1, 0.3, 1) !important;
        padding: 0 !important;
        margin: 0 !important;
        width: 100% !important;
        pointer-events: auto !important;
    }

    .nav-item.accordion-open .dropdown-menu {
        max-height: 500px !important;
        border-top: 1px solid #f0f0f0;
    }

    .nav-item .dropdown-inner {
        padding: 4px 0 !important;
    }

    .nav-item .dropdown-item {
        padding: 14px 24px 14px 40px !important;
        font-size: 15px !important;
        color: #555 !important;
        border-bottom: 1px solid #f5f5f5 !important;
        position: relative;
        transition: background 0.2s ease, color 0.2s ease, padding-left 0.2s ease !important;
    }

    .nav-item .dropdown-item::before {
        content: '';
        position: absolute;
        left: 28px;
        top: 50%;
        transform: translateY(-50%);
        width: 4px;
        height: 4px;
        border-radius: 50%;
        background: #ccc;
        transition: background 0.2s ease;
    }

    .nav-item .dropdown-item:hover,
    .nav-item .dropdown-item:active {
        background: rgba(0, 123, 255, 0.06) !important;
        color: var(--primary-blue) !important;
        padding-left: 44px !important;
    }

    .nav-item .dropdown-item:hover::before,
    .nav-item .dropdown-item:active::before {
        background: var(--primary-blue);
    }

    .nav-item .dropdown-item-all {
        font-weight: 600 !important;
        color: var(--primary-blue) !important;
        border-bottom: 1px solid #eee !important;
    }

    .nav-item .dropdown-item-all::before {
        background: var(--primary-blue);
        width: 6px;
        height: 6px;
    }

    .nav-item.dropdown-disabled .dropdown-menu {
        display: none !important;
        max-height: 0 !important;
    }

    .nav-item.dropdown-disabled .dropdown-arrow {
        display: none !important;
    }

    .nav-item.dropdown-disabled .nav-link {
        cursor: pointer !important;
    }

    .language-switcher {
        display: flex !important;
        flex-direction: row !important;
        gap: 8px !important;
        padding: 16px 24px !important;
        margin: 0 !important;
        border-top: 1px solid #f0f0f0;
        background: #fafbfc;
    }

    .language-switcher a {
        flex: 1;
        text-align: center;
        padding: 10px 16px !important;
        border-radius: 8px !important;
        font-size: 14px !important;
        font-weight: 500 !important;
        border: 1.5px solid #e0e0e0 !important;
        color: #666 !important;
        background: #fff !important;
        transition: all 0.2s ease !important;
    }

    .language-switcher a.active {
        background: var(--primary-blue) !important;
        color: #fff !important;
        border-color: var(--primary-blue) !important;
    }

    .language-switcher a:after {
        display: none !important;
    }

    .menu-toggle {
        border-radius: 12px !important;
        background: rgba(0, 123, 255, 0.08) !important;
        transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1) !important;
    }

    .menu-toggle:active {
        background: rgba(0, 123, 255, 0.15) !important;
        transform: scale(0.92) !important;
    }

    .menu-toggle span {
        transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1) !important;
    }

    .menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px) !important;
    }

    .menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px) !important;
    }
}

@media (max-width: 375px) {
    .nav-menu {
        width: 280px !important;
        left: -290px !important;
    }

    .nav-menu > a,
    .nav-item .nav-link {
        padding: 14px 20px !important;
        font-size: 15px !important;
    }

    .nav-item .dropdown-item {
        padding: 12px 20px 12px 36px !important;
        font-size: 14px !important;
    }
}

/* === 17. Q-Bounce Dropdown Animation (Q弹弹出动画) ===
 * 效果：菜单从顶部"挤出"，快速展开后伴随 1-2 次小幅回弹
 * 桌面端专用 (min-width: 769px)，避免影响移动端手风琴行为
 */
@media (min-width: 769px) {
    @keyframes qBounceDrop {
        0% {
            opacity: 0;
            transform: translateX(-50%) translateY(-20px) scaleY(0.55);
        }
        45% {
            opacity: 1;
            transform: translateX(-50%) translateY(2px) scaleY(1.08);
        }
        65% {
            transform: translateX(-50%) translateY(-1.5px) scaleY(0.96);
        }
        85% {
            transform: translateX(-50%) translateY(0.5px) scaleY(1.015);
        }
        100% {
            opacity: 1;
            transform: translateX(-50%) translateY(0) scaleY(1);
        }
    }

    .dropdown-menu {
        transform-origin: top center;
    }

    .nav-item:hover .dropdown-menu,
    .nav-item.dropdown-open .dropdown-menu {
        animation: qBounceDrop 450ms cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
    }
}

@media (min-width: 769px) and (prefers-reduced-motion: reduce) {
    .nav-item:hover .dropdown-menu,
    .nav-item.dropdown-open .dropdown-menu {
        animation: none;
    }
}