/* =======================================================================
           基础动画样式
           ======================================================================= */

        /* 关键帧动画 */
        @keyframes spin {
            0% {
                transform: rotate(0deg);
            }

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

        @keyframes pulse {

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

            50% {
                transform: scale(1.1);
                opacity: 0.8;
            }
        }

        /* 滚动进入动画 */
        .fade-in-up {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }

        .fade-in-up.animated {
            opacity: 1;
            transform: translateY(0);
        }

        .fade-in-left {
            opacity: 0;
            transform: translateX(-30px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }

        .fade-in-left.animated {
            opacity: 1;
            transform: translateX(0);
        }

        .fade-in-right {
            opacity: 0;
            transform: translateX(30px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }

        .fade-in-right.animated {
            opacity: 1;
            transform: translateX(0);
        }

        /* =======================================================================
           全局组件样式
           ======================================================================= */


        /* 页面滚动进度条 */
        .scroll-progress {
            position: fixed;
            top: 0;
            left: 0;
            width: 0%;
            height: 3px;
            background: linear-gradient(90deg, #3C6EDD, #ffc107);
            z-index: 1002;
            transition: width 0.1s ease;
        }

        /* 图片懒加载效果 */
        .lazy-image {
            opacity: 0;
            transition: opacity 0.5s ease;
        }

        .lazy-image.loaded {
            opacity: 1;
        }

        /* =======================================================================
           交互效果组件
           ======================================================================= */

        /* 按钮微交互 */
        .btn-micro {
            position: relative;
            overflow: hidden;
            transition: all 0.3s ease;
        }

        .btn-micro::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            width: 0;
            height: 0;
            background: rgba(255, 255, 255, 0.2);
            border-radius: 50%;
            transform: translate(-50%, -50%);
            transition: width 0.6s ease, height 0.6s ease;
        }

        .btn-micro:hover::before {
            width: 300px;
            height: 300px;
        }

        /* 卡片悬停效果 */
        .card-hover {
            transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
        }

        .card-hover:hover {
            transform: translateY(-8px) scale(1.02);
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
        }

        /* 导航链接微交互 */
        .nav-link-micro {
            position: relative;
            overflow: hidden;
            transition: color 0.3s ease;
        }

        .nav-link-micro::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: #ffc107;
            transition: width 0.3s ease;
        }

        .nav-link-micro:hover::after,
        .nav-link-micro.active::after {
            width: 100%;
        }

        .nav-link-micro:hover {
            color: #3C6EDD;
        }

        .nav-link-micro.active {
            color: #3C6EDD;
            font-weight: 500;
        }


        /* =======================================================================
           页面内容区域样式
           ======================================================================= */

        /* =======================================================================
           Banner 区域样式
           ======================================================================= */

        .banner-section {
            position: relative;
            height: 33vh;
            min-height: 400px;
            max-height: 450px;
            background: linear-gradient(rgba(25,34,84,0.54), rgba(25,34,84,0.54)),
            url('../../../img/case_1_bg.jpg') center center/cover no-repeat;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            text-align: center;
        }

        .banner-content {
            max-width: 600px;
            padding: 0 20px;
        }

        .banner-title {
            font-size: 2.5rem;
            font-weight: 600;
            margin-bottom: 10px;
            text-shadow: 0 2px 8px rgba(0, 0, 0, 0.6);
            line-height: 1.2;
        }

        /* Banner 底部选项卡 */
        .banner-tabs {
            position: absolute;
            bottom: -30px;
            left: 20px;
            right: 20px;
            margin: 0 auto;
            max-width: 1260px;
            z-index: 10;
        }

        .banner-tabs-inner {
            background: white;
            border-radius: 8px;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
            padding: 16px;
            width: 100%;
            margin: 0 auto;
        }

        .banner-tab-nav {
            display: flex;
            justify-content: flex-start;
            align-items: center;
            padding: 0;
            margin: 0;
            list-style: none;
            gap: 32px;
        }

        .banner-tab-item {
            margin: 0;
        }

        .banner-tab-link {
            display: block;
            padding: 12px 24px;
            color: #666;
            text-decoration: none;
            font-size: 15px;
            font-weight: 400;
            transition: all 0.3s ease;
            border-radius: 8px;
            white-space: nowrap;
        }

        .banner-tab-link:hover {
            color: white;
            background: #3C6EDD;
            font-weight: 500;
        }

        .banner-tab-link.active {
            color: white;
            background: #3C6EDD;
            font-weight: 500;
        }

        /* =======================================================================
           移动端二级菜单选项卡样式
           ======================================================================= */

        /* 移动端选项卡容器 */
        .mobile-submenu-tabs {
            position: sticky;
            top: 70px; /* 在移动端导航栏下方 */
            z-index: 100;
            background: white;
            border-bottom: 1px solid rgba(0, 0, 0, 0.1);
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
            transition: all 0.3s ease;
        }

        .mobile-submenu-container {
            width: 100%;
            max-width: 100vw;
            overflow: hidden;
        }

        .mobile-submenu-scrollable {
            display: flex;
            overflow-x: auto;
            scrollbar-width: none; /* Firefox */
            -ms-overflow-style: none; /* IE 10+ */
            scroll-behavior: smooth;
            padding: 0 15px;
            gap: 0;
        }

        .mobile-submenu-scrollable::-webkit-scrollbar {
            display: none; /* Chrome, Safari, Opera */
        }

        /* 移动端选项卡样式 */
        .mobile-submenu-tab {
            flex: 0 0 auto;
            margin-top: 15px;
            padding: 15px 10px 10px 15px;
            background: transparent;
            color: #999999;
            text-decoration: none;
            font-size: 16px;
            font-weight: 400;
            white-space: nowrap;
            transition: all 0.3s ease;
            border-bottom: 2px solid transparent;
            position: relative;
        }

        .mobile-submenu-tab:hover {
            text-decoration: none;
            color: #5D5F5F;
        }

        .mobile-submenu-tab.active {
            color: #5D5F5F;
            font-weight: 500;
            border-bottom: none;
        }

        .mobile-submenu-tab.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80%;
            height: 2px;
            background-color: #3C6EDD;
        }

        /* PC端隐藏移动端选项卡 */
        @media (min-width: 768px) {
            .mobile-submenu-tabs {
                display: none !important;
            }
        }

        /* 移动端优化 */
        @media (max-width: 767px) {
            .mobile-submenu-tabs {
                top: 60px; /* 适配移动端导航栏高度 */
            }
            
            .mobile-submenu-tab {
                padding: 10px 12px 8px 12px;
                font-size: 14px;
            }
        }

        /* Banner 移动端适配 */
        @media (max-width: 768px) {
            .banner-section {
                height: 30vh;
                min-height: 250px;
                max-height: 320px;
                margin-top: 40px;
            }

            .banner-title {
                font-size: 1.8rem;
                margin-bottom: 8px;
            }

            /* 在移动端隐藏原有的banner-tabs */
            .banner-tabs {
                display: none !important;
            }

            .case-section {
                padding: 60px 0 30px 0;
            }
        }

        @media (max-width: 480px) {
            .banner-section {
                height: 25vh;
                min-height: 220px;
                max-height: 280px;
                margin-top: 40px;
            }

            .banner-title {
                font-size: 1.5rem;
            }

            .case-section {
                padding: 60px 0 0 0;
            }
        }

        /* =======================================================================
           案例展示模块
           ======================================================================= */

        /* 案例展示容器 */
        .case-section {
            padding: 60px 0 30px 0;
            background-color: #F6F6F6;
        }

        .case-section .container {
            max-width: 1300px;
            padding-left: 20px;
            padding-right: 20px;
        }

        /* 案例展示内容2和4的上边距 - 仅PC端 */
        @media (min-width: 769px) {
            .case-tab-content[data-tab="2"],
            .case-tab-content[data-tab="4"] {
                margin-top: 30px;
            }
        }


        /* 左侧案例卡片 */
        .case-left {
            background: white;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
            transition: all 0.3s ease;
            height: 100%;
            display: flex;
            flex-direction: column;
            overflow: hidden;
        }

        .case-left:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.12);
        }

        /* 左侧案例图片 */
        .case-image-left {
            width: 100%;
            height: 400px;
            overflow: hidden;
            flex-shrink: 0;
        }

        .case-image-left img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.3s ease;
        }

        .case-left:hover .case-image-left img {
            transform: scale(1.02);
        }

        /* 左侧案例内容 */
        .case-content-left {
            flex-grow: 1;
            display: flex;
            background-color: white;
            flex-direction: column;
        }

        .case-title-box {
            background: url('../../../img/case_box.png') no-repeat left center;
            background-size: contain;
            padding: 15px 20px;
            margin-bottom: 30px;
            margin-top: 30px;
            text-align: left;
            position: relative;
            width: 100%;
        }

        .case-title-box-max {
            background: url('../../../img/case_box_max.png') no-repeat left center;
            background-size: contain;
            padding: 15px 20px;
            margin-bottom: 30px;
            margin-top: 30px;
            text-align: left;
            position: relative;
            width: 100%;
        }

        .case-title {
            font-size: 16px;
            font-weight: 600;
            color: #3C6EDD;
            margin: 0;
            position: relative;
            z-index: 2;
        }

        .case-description {
            flex-grow: 1;
            padding: 0 20px 30px 20px;
        }

        .case-subtitle {
            font-size: 18px;
            font-weight: 400;
            color: #4B4E4E;
            margin-bottom: 15px;
            text-align: left;
        }

        .case-text {
            font-size: 14px;
            line-height: 1.8;
            color: #3C6EDD;
            margin: 0;
            text-align: left;
            max-width: 100%;
            word-wrap: break-word;
            hyphens: auto;
        }
        
        /* 文本响应式换行优化 */
        @media (max-width: 1200px) {
            .case-text {
                font-size: 14px;
                line-height: 1.7;
            }
        }
        
        @media (max-width: 992px) {
            .case-text {
                font-size: 13px;
                line-height: 1.6;
            }
        }
        
        @media (max-width: 768px) {
            .case-text {
                font-size: 13px;
                line-height: 1.6;
            }
        }
        
        @media (max-width: 480px) {
            .case-text {
                font-size: 12px;
                line-height: 1.5;
            }
        }

        /* 右侧案例卡片 */
        .case-right {
            height: 100%;
            display: flex;
            flex-direction: column;
            overflow: hidden;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
            transition: all 0.3s ease;
            background: white;
        }

        .case-right:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.12);
        }

        /* 右侧案例图片 */
        .case-image-top {
            background: white;
            text-align: center;
        }

        .case-image-top img {
            width: 100%;
            height: auto;
            transition: transform 0.3s ease;
        }

        /* 右侧蓝色文字区域 */
        .case-blue-section {
            background: #192254;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
        }

        .case-title-box-blue {
            background: url('../../../img/case_box_white.png') no-repeat;
            background-size: contain;
            padding: 15px 20px;
            margin-bottom: 30px;
            margin-top: 30px;
            text-align: center;
            position: relative;
        }

        .case-title-box-blue-max {
            background: url('../../../img/case_box_white_max.png') no-repeat;
            background-size: contain;
            padding: 15px 20px;
            margin-bottom: 30px;
            margin-top: 30px;
            text-align: center;
            position: relative;
        }

        .case-title-blue {
            font-size: 16px;
            font-weight: 400;
            color: white;
            text-align: left;
            margin: 0;
            position: relative;
            z-index: 2;
        }

        .case-description-blue {
            flex-grow: 1;
            padding-left: 20px;
            padding-right: 20px;
            padding-bottom: 30px;
        }

        .case-subtitle-blue {
            font-size: 16px;
            font-weight: 300;
            color: white;
            margin-bottom: 20px;
            text-align: left;
        }

        .case-text-blue {
            font-size: 14px;
            font-weight: 300;
            line-height:2;
            color: white;
            margin: 0;
            text-align: left;
            max-width: 100%;
            word-wrap: break-word;
            hyphens: auto;
        }
        
        /* 蓝色文本响应式换行优化 */
        @media (max-width: 1200px) {
            .case-text-blue {
                font-size: 14px;
                line-height: 2;
            }
        }
        
        @media (max-width: 992px) {
            .case-text-blue {
                font-size: 13px;
                line-height: 2;
            }
        }
        
        @media (max-width: 768px) {
            .case-text-blue {
                font-size: 13px;
                line-height: 2;
            }
        }
        
        @media (max-width: 480px) {
            .case-text-blue {
                font-size: 12px;
                line-height: 2;
            }
        }

        /* 案例展示底部导航 */
        .case-bottom-nav {
            padding: 0 15px;
        }

        .case-nav-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0;
        }

        .case-nav-left {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .case-play-icon {
            font-size: 14px;
            color: #4B4E4E;
            opacity: 0.8;
        }

        .case-nav-title {
            font-size: 24px;
            font-weight: 400;
            color: #4B4E4E;
            margin: 0;
        }

        .case-nav-right {
            font-size: 14px;
            font-weight: 300;
        }

        .case-more-link {
            font-size: 14px;
            color: #4B4E4E;
            text-decoration: none;
            transition: color 0.3s ease;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .case-more-link:hover {
            color: #3C6EDD;
            text-decoration: none;
        }

        .case-more-link i {
            font-size: 14px;
            color: #4B4E4E;
            transition: transform 0.3s ease;
        }

        .case-more-link:hover i {
            transform: translateX(3px);
        }




        /* =======================================================================
           响应式设计 - 移动端适配
           ======================================================================= */

        /* 统一容器边距管理 */
        @media (min-width: 1400px) {
            .case-section .container {
                padding-left: 30px;
                padding-right: 30px;
            }
        }

        @media (min-width: 992px) and (max-width: 1399px) {
            .case-section .container {
                padding-left: 25px;
                padding-right: 25px;
            }
        }

        /* 平板和手机端适配 (768px 以下) */
        @media (max-width: 768px) {
            .case-section {
                padding: 60px 0;
            }

            .case-section .container {
                padding-left: 15px;
                padding-right: 15px;
                max-width: 100%;
                display: flex;
                flex-direction: column;
                align-items: center;
            }

            .case-section .container>.row {
                width: 100%;
                max-width: 480px;
                margin: 0;
                display: flex;
                flex-direction: column;
                align-items: center;
            }

            .case-content .col-md-8,
            .case-content .col-md-4 {
                margin-bottom: 30px;
                padding-left: 5px;
                padding-right: 5px;
            }

            /* 移动端案例卡片居中显示 */
            .case-content {
                display: flex;
                flex-direction: column;
                align-items: center;
            }

            .case-content .col-md-8,
            .case-content .col-md-4 {
                flex: 0 0 auto;
                width: 100%;
                max-width: 100%;
                display: flex;
                justify-content: center;
            }

            .case-item {
                width: 100%;
                max-width: 480px;
                margin: 0 auto;
            }

            /* 左侧案例移动端 */
            .case-left {
                margin-bottom: 20px;
            }

            .case-image-left {
                height: 250px;
            }

            .case-title-box {
                padding: 15px 20px;
                margin-bottom: 30px;
            }

           

            .case-description {
                padding: 0 25px 30px 25px;
            }

            .case-subtitle {
                font-size: 16px;
                margin-bottom: 12px;
            }

            .case-text {
                font-size: 13px;
                line-height: 2;
            }

            /* 右侧案例移动端 */
            .case-right {
                margin-bottom: 20px;
            }

            .case-description-blue {
                padding-left: 20px;
                padding-right: 20px;
            }

            /* 案例底部导航移动端 */
            .case-bottom-nav {
                margin-top: 30px;
                padding: 0 5px;
                display: flex;
                justify-content: center;
            }

            .case-bottom-nav .col-12 {
                width: 100%;
                max-width: 380px;
                margin: 0 auto;
            }

            .case-nav-content {
                padding: 15px 0;
                flex-direction: row;
                justify-content: space-between;
                align-items: center;
                gap: 10px;
                text-align: left;
            }

            .case-nav-left {
                justify-content: flex-start;
                flex: 1;
                min-width: 0;
            }

            .case-nav-title {
                font-size: 15px;
                white-space: nowrap;
                overflow: hidden;
                text-overflow: ellipsis;
            }

            .case-more-link {
                font-size: 13px;
                flex-shrink: 0;
                white-space: nowrap;
            }
        }

        /* 超小屏幕适配 (480px 以下) */
        @media (max-width: 480px) {
            .case-section {
                padding-bottom: 0;
            }

            .case-section .container {
                padding-left: 12px;
                padding-right: 12px;
            }

            .case-section .container>.row {
                max-width: 460px;
            }

            .case-content .col-md-8,
            .case-content .col-md-4 {
                padding-left: 3px;
                padding-right: 3px;
            }

            /* 超小屏幕案例卡片最大宽度调整 */
            .case-item {
                max-width: 460px;
            }

            /* 左侧案例超小屏 */
            .case-image-left {
                height: 200px;
            }

            .case-title-box {
                padding: 15px 20px;
                margin-bottom: 30px;
            }

          

            .case-description {
                padding: 0 20px 20px 20px;
            }

            .case-subtitle {
                font-size: 15px;
                margin-bottom: 10px;
            }

            .case-text {
                font-size: 12px;
                line-height: 2;
            }

            .case-description-blue {
                padding-left: 20px;
                padding-right: 20px;
            }

            /* 案例底部导航超小屏 */
            .case-bottom-nav {
                margin-top: 25px;
                padding: 0 3px;
                display: flex;
                justify-content: center;
            }

            .case-bottom-nav .col-12 {
                max-width: 460px;
            }

            .case-nav-content {
                padding: 12px 0;
                gap: 8px;
                flex-direction: row;
                justify-content: space-between;
                align-items: center;
            }

            .case-nav-title {
                font-size: 14px;
                white-space: nowrap;
                overflow: hidden;
                text-overflow: ellipsis;
            }

            .case-more-link {
                font-size: 12px;
                flex-shrink: 0;
                white-space: nowrap;
            }
        }

        /* =======================================================================
           导航栏样式
           ======================================================================= */

        /* PC端导航栏 */
        .nav-links a {
            color: #333;
            margin: 0 20px;
            text-decoration: none;
            font-size: 16px;
            font-weight: 400;
            padding: 10px 0;
            position: relative;
            transition: color 0.3s ease;
        }

        .nav-links a:hover,
        .nav-links a.active {
            color: #3C6EDD;
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background-color: #FFD700;
            transition: width 0.3s ease;
        }

        .nav-links a:hover::after,
        .nav-links a.active::after {
            width: 100%;
        }

        /* Ensure no conflicts with mobile navigation */
        .nav-links.d-md-none a::after {
            display: none !important;
        }

        /* PC导航栏滚动悬浮置顶效果 */
        @media (min-width: 769px) {
            .top-nav {
                transition: all 0.3s ease;
                background-color: transparent;
                padding: 20px 0;
                position: absolute;
                top: 0;
                left: 0;
                right: 0;
                z-index: 1001;
                box-shadow: none;
            }

           

            .top-nav .nav-links a {
                color: white;
                text-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
            }

            .top-nav .nav-links a:hover,
            .top-nav .nav-links a.active {
                color: #FFFFFF;
            }

            .top-nav.sticky {
                position: fixed;
                top: 0;
                left: 0;
                right: 0;
                background-color: rgba(255, 255, 255, 0.95);
                backdrop-filter: blur(10px);
                box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
                padding: 10px 0;
            }

            .top-nav.sticky .logo img {
                height: 30px;
                transition: height 0.3s ease;
                filter: none;
            }

            .top-nav.sticky .nav-links a {
                color: #333;
                text-shadow: none;
            }

            .top-nav.sticky .nav-links a:hover,
            .top-nav.sticky .nav-links a.active {
                color: #3C6EDD;
            }

            /* 为固定导航栏后的内容添加顶部间距 */
            body.nav-sticky .case-section {
                margin-top: 70px;
            }
        }



        @media (max-width: 768px) {

            /* 手机布局 */
            .top-nav {
                padding: 12px 0;
                position: fixed;
                top: 0;
                left: 0;
                right: 0;
                z-index: 1001;
                background: white;
                box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
            }

            .logo img {
                height: 30px;
            }

            .mobile-menu-btn {
                display: block;
                background: none;
                border: none;
                font-size: 24px;
                color: #192254;
                cursor: pointer;
                z-index: 1002;
                position: relative;
            }

            /* 移动端抽屉菜单 - 重写 */
            .nav-links.d-md-none {
                display: none;
                position: fixed;
                top: 0;
                left: -300px;
                width: 280px;
                height: 100vh;
                background: white;
                z-index: 1000;
                box-shadow: 2px 0 10px rgba(0, 0, 0, 0.1);
                transition: left 0.3s ease;
                overflow-y: auto;
            }

            .nav-links.d-md-none.active {
                display: block;
                /* 改为block布局 */
                left: 0;
            }

            /* 菜单遮罩层 */
            .menu-overlay {
                display: none;
                position: fixed;
                top: 0;
                left: 0;
                width: 100%;
                height: 100%;
                background: rgba(0, 0, 0, 0.5);
                z-index: 999;
                opacity: 0;
                transition: opacity 0.3s ease;
            }

            .menu-overlay.active {
                display: block;
                opacity: 1;
            }

            /* 关闭按钮 - 重写，单独一行显示 */
            .menu-close-btn {
                display: block;
                width: 100%;
                height: 50px;
                background: none;
                border: none;
                font-size: 20px;
                color: #192254;
                cursor: pointer;
                text-align: left;
                padding-left: 20px;
                border-bottom: 1px solid #f0f0f0;
                z-index: 1001;
                position: relative;
                top: 0;
                left: 0;
            }

            .menu-close-btn:hover {
                background-color: #f8f9fa;
            }

            /* 菜单项 - 重写 */
            .nav-links.d-md-none a {
                display: block;
                padding: 15px 30px;
                color: #192254;
                text-decoration: none;
                transition: color 0.3s ease;
            }

            /* 第一个菜单项 - 移除额外的margin */
            .nav-links.d-md-none a:first-child {
                margin-top: 0;
                /* 移除额外间距 */
            }

            /* 最后一个菜单项 */
            .nav-links.d-md-none a:last-child {
                border-bottom: none;
            }

            /* 悬停效果 */
            .nav-links.d-md-none a:hover {
                color: #3C6EDD;
                background-color: #f8f9fa;
            }

            /* Active状态 */
            .nav-links.d-md-none a.active {
                color: #3C6EDD;
                font-weight: 500;
                background-color: transparent;
            }

            /* 移除所有伪元素 */
            .nav-links.d-md-none a::before,
            .nav-links.d-md-none a::after {
                display: none !important;
            }
        }




        /* 移动端栅格系统优化 - 参考index.html样式 */
        @media (max-width: 768px) {


            /* Footer移动端样式 - 已提取到main.css */
        }