/* ================= 基础重置 ================= */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            color: #333;
            line-height: 1.6;
            background-color: #fff;
            overflow-x: hidden;
        }

        a {
            text-decoration: none;
            color: inherit;
        }

        ul {
            list-style: none;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        /* 变量定义 */
        :root {
            --primary-color: #0056FF;
            --text-dark: #222;
            --text-gray: #666;
            --bg-light: #F7F9FC;
            --bg-blue-light: #F0F5FF;
            --container-width: 1200px;
        }

        /* 容器 */
        .container {
            width: 100%;
            max-width: var(--container-width);
            margin: 0 auto;
            padding: 0 20px;
        }

        /* 通用标题样式 */
        .section-header {
            text-align: center;
            margin-bottom: 50px;
        }

        .section-header h2 {
            font-size: 32px;
            color: var(--text-dark);
            margin-bottom: 10px;
            font-weight: bold;
        }

        .section-header p {
            font-size: 16px;
            color: var(--text-gray);
        }

        /* 通用按钮 */
        .btn {
            display: inline-block;
            padding: 10px 24px;
            border-radius: 20px;
            font-size: 14px;
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .btn-primary {
            background-color: var(--primary-color);
            color: #fff;
            border: 1px solid var(--primary-color);
        }
        
        .btn-primary:hover {
            background-color: #0044cc;
        }

        .btn-outline {
            background-color: transparent;
            color: var(--primary-color);
            border: 1px solid var(--primary-color);
        }

        /* ================= 导航栏 ================= */
       

        /* ================= Hero 区域 ================= */
        .hero {
            background: linear-gradient(135deg, #e3f2fd 0%, #f4f9ff 100%);
            padding: 60px 0;
            background: url(../img/hyzx_banner.png) no-repeat center center;
        }
        .step{
            margin-top: -116px;
        }

        .hero-content {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .hero-text {
            flex: 1;
            padding-right: 40px;
        }

        .hero-text h1 {
            font-size: 48px;
            color: var(--text-dark);
            margin-bottom: 20px;
            font-weight: 800;
        }

        .hero-text p {
            font-size: 20px;
            color: var(--text-gray);
        }

        .hero-image {
            flex: 1;
            display: flex;
            justify-content: flex-end;
        }
        
        /* 占位图样式 */
        .img-placeholder {
            background-color: #e0e0e0;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #999;
            font-size: 14px;
        }

        /* ================= 场景还原测验 ================= */
        .scene-test {
            padding: 80px 0;
            background-color: #fff;
            max-width: 1200px;
            margin: 0 auto;
        }

        .scene-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 60px;
            gap: 40px;
        }

        .scene-text {
            flex: 1;
        }

        .scene-text h3 {
            font-size: 18px;
            margin-bottom: 20px;
            color: var(--text-dark);
        }

        .scene-text p {
            color: var(--text-gray);
            font-size: 12px;
            line-height: 1.8;
        }

        .scene-image {
            flex: 1;
        }

        .scene-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
            position: relative;
        }
        .scene-steps .step-item:nth-child(1){
            margin-top: -76px;

        }
        .scene-steps .step-item:nth-child(2){
            margin-top: -50px;

        }

        .step-item {
            position: relative;
            z-index: 2;
            text-align: left;
        }

        .step-num {
            font-size: 24px;
            font-weight: bold;
            color: #b3d4ff;
            margin-bottom: 10px;
            background: #fff;
            display: inline-block;
        }

        .step-item h4 {
            font-size: 18px;
            color: var(--primary-color);
            margin-bottom: 10px;
        }

        .step-item p {
            font-size: 14px;
            color: var(--text-gray);
        }

        /* ================= 多维满意度分析 ================= */
        .satisfaction {
            padding: 80px 0;
            background-color: var(--bg-blue-light);
            background: url(../img/yhdc_bg.png) no-repeat center center;
        }

        .satisfaction-center-img {
            max-width: 600px;
            margin: 0 auto 60px;
        }

        .features-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .feature-item {
            display: flex;
            gap: 15px;
            align-items: flex-start;
            background: #fff;
            padding: 20px;
            border-radius: 10px;
            box-shadow: 0 4px 15px rgba(0,0,0,0.02);
        }

        .feature-icon {
            width: 40px;
            height: 40px;
            /* background-color: var(--primary-color); */
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: bold;
            flex-shrink: 0;
        }

        .feature-text h4 {
            font-size: 16px;
            margin-bottom: 5px;
            color: var(--text-dark);
        }

        .feature-text p {
            font-size: 13px;
            color: var(--text-gray);
        }

        /* ================= 外显与内隐满意度 ================= */
        .explicit-implicit {
            padding: 50px 0;
            background: #fff;
            max-width: 1200px;
            margin: 0 auto;
        }

        .cards-container {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
            margin-bottom: 40px;
        }

        .card-large {
            border-radius: 20px;
            padding: 40px;
            color: #fff;
            display: flex;
            justify-content: space-between;
            align-items: center;
            overflow: hidden;
            position: relative;
        }

        .card-orange {
            background: linear-gradient(135deg, #ffb76b 0%, #ff7f50 100%);
            background: url(../img/yhdc_mydtu1.png) no-repeat center center;
        }

        .card-purple {
            background: linear-gradient(135deg, #b388ff 0%, #7c4dff 100%);
             background: url(../img/yhdc_mydtu2.png) no-repeat center center;
        }

        .card-content {
            z-index: 2;
            width: 40%;
        }

        .card-content h3 {
            font-size: 24px;
            margin-bottom: 15px;
        }

        .card-content p {
            font-size: 16px;
            opacity: 0.9;
            line-height: 1.6;
        }

        .card-img {
            width: 150px;
            flex-shrink: 0;
            z-index: 2;
        }

        .features-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
            background-color: #ecf7fe;
        }

        .feature-box {
            display: flex;
            align-items: flex-start;
            gap: 7px;
            padding: 20px;
            /* background: var(--bg-light); */
            border-radius: 10px;
        }

        .feature-box-icon {
            width: 60px;
            height: 60px;
            /* background: #b3d4ff; */
            border-radius: 5px;
            flex-shrink: 0;
        }

        .feature-box h4 {
            font-size: 18px;
            margin-bottom: 5px;
        }

        .feature-box p {
            font-size: 14px;
            color: var(--text-gray);
        }

        /* ================= 人群分层与画像 ================= */
        .audience {
            padding: 80px 0;
            background-color: var(--bg-blue-light);
        }

        .audience-layout {
            display: flex;
            align-items: center;
            gap: 50px;
        }

        .audience-left {
            flex: 1.2;
            position: relative;
        }
        .audience-left::after{
            display: block;
            content: "";
            width: 18px;
            height: 400PX;
            position: absolute;
            right: -27px;
            top: 45px;
            background: url(../img/yhdc_rqfcxian2.png) no-repeat center center;
        }
        .audience-left span{
            display: block;
            text-align: center;
            margin-top: 20px;
            font-size: 18px;
            color: #0358f7;
            font-weight: bold;

        }
        .audience-left p{
            text-align: center;
            margin-top: 20px;
        }

        .audience-right {
            flex: 1;
        }

        .audience-list {
            display: flex;
            flex-direction: column;
            gap: 30px;
        }

        .audience-item {
            display: flex;
            gap: 20px;
            align-items: flex-start;
        }

        .audience-icon {
            width: 50px;
            height: 50px;
            background: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary-color);
            font-weight: bold;
            flex-shrink: 0;
            box-shadow: 0 4px 10px rgba(0,86,255,0.1);
        }

        .audience-text h4 {
            font-size: 20px;
            color: var(--primary-color);
            margin-bottom: 8px;
        }

        .audience-text p {
            font-size: 14px;
            color: var(--text-gray);
            line-height: 1.6;
        }

        /* ================= 研究案例 ================= */
        .cases {
            padding: 80px 0;
            background: #fff;
        }

        .case-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
            margin-bottom: 50px;
        }

        .case-card {
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 5px 20px rgba(0,0,0,0.05);
            background: #fff;
            transition: transform 0.3s;
        }
        .case-card img.cover {
            width: 100%;
            height: 200px;
            object-fit: cover;
        }

        .case-card:hover {
            transform: translateY(-5px);
        }

        .case-img {
            height: 200px;
            background-color: #f0f0f0;
        }

        .case-content {
            padding: 20px;
        }

        .case-content h4 {
            font-size: 18px;
            margin-bottom: 10px;
            color: var(--text-dark);
        }

        .case-content p {
            font-size: 14px;
            color: var(--text-gray);
            margin-bottom: 20px;
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .case-btn-wrap {
            text-align: center;
        }

        /* ================= 页脚 ================= */
        
        }

        /* ================= 响应式适配 (Mobile & Tablet) ================= */
        @media (max-width: 992px) {
            .hero-text h1 { font-size: 36px; }
            .scene-top { flex-direction: column; }
            .features-grid { grid-template-columns: repeat(2, 1fr); }
            .cards-container { grid-template-columns: 1fr; }
            .audience-layout { flex-direction: column; }
            .case-grid { grid-template-columns: repeat(2, 1fr); }
        }

        @media (max-width: 768px) {
            /* 导航栏 */
           .step{
            display: none;
           }
           .scene-test,.satisfaction,.audience,.cases{
            padding: 20px 0;
            background-size:auto 100%;
           }
           .scene-top{
            gap: 0;
            padding: 0 15px;
            margin-bottom: 20px;
           }
           .scene-steps .step-item{
            margin-top: 0!important;
           }
            /* Hero */
            .hero-content { flex-direction: column; text-align: center; }
            .hero-text { padding-right: 0; margin-bottom: 40px; }
            .hero-text h1 { font-size: 32px; }
            .hero-text p { font-size: 16px; }

            /* 通用标题 */
            .section-header h2 { font-size: 24px; }
            .section-header p { font-size: 14px; }

            /* 场景测验 */
            .scene-steps {
                
                gap: 20px;
                                
                padding: 0 15px;
                                
                grid-template-columns: repeat(2, 1fr);
            }
            .scene-steps::before { display: none; } /* 移动端隐藏连接线 */
            .cards-container{
                display: block;
                padding: 0 15px;
            }

            /* 满意度 */
            .features-grid {
                grid-template-columns: 1fr;
            }

            /* 外显内隐 */
            .features-row {
                grid-template-columns: 1fr;
            }

            .card-large {
                flex-direction: column;
                text-align: center;
                gap: 16px;
                align-items: flex-start;
                text-align: left;
                padding: 10px;
                margin-bottom: 15px;
            }

            /* 人群画像 */
            .audience-left { order: 2; } /* 移动端将图片放下面 */
            
            .audience-right { order: 1; }

            /* 案例 */
            .case-grid {
                grid-template-columns: 1fr;
            }
            .audience-layout{
                flex-direction: column;
            }
            .audience-left::after{
                display: none;
            }

        }