/* 基础全局样式 */

    html {
        height: 100%;
        scroll-behavior: smooth;
        scroll-padding-top: 80px;
        /* 防止导航栏遮挡内容 */
    }

    :root {
        --primary-blue: #2A5CBE;
        /* 医疗蓝主色 */
        --text-primary: #1A2B4D;
        /* 主要文字颜色 */
        --background-light: #F8FAFC;
        /* 背景色 */
        --shadow-color: rgba(42, 92, 190, 0.1);
        /* 阴影颜色 */
    }

    body {
        min-height: 100vh;
        display: flex;
        flex-direction: column;
        font-family: 'Microsoft YaHei', system-ui, sans-serif;
        /* 中文字体优先 */
        background: var(--background-light);
        margin: 0;
        padding: 0;
        line-height: 1.6;
        color: var(--text-primary);
        overflow-x: hidden;
        /* 防止横向滚动 */
    }

    main {
        flex: 1;
        /* 内容区自动扩展 */
        padding: 2rem 5%;
        /* 添加内容区留白 */
    }

    /* 导航栏容器升级 (融合网页6的极简设计 & 网页8的动态交互) */

    .navbar {
        position: fixed;
        top: 0;
        width: 100%;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(12px);
        box-shadow: 0 4px 30px rgba(42, 92, 190, 0.08);
        display: flex;
        align-items: center;
        padding: 0 4%;
        height: 80px;
        /* 增加导航栏高度提升视觉权重 */
        z-index: 1000;
        transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

    /* 品牌标识增强 (参考网页7的视觉层次) */

    .nav-brand {
        display: flex;
        align-items: center;
        gap: 12px;
        padding: 8px 0;
    }

    .nav-brand img {
        height: 48px;
        transition: all 0.4s ease;
        filter: drop-shadow(2px 2px 4px rgba(42, 92, 190, 0.1));
    }

    .nav-brand:hover img {
        transform: rotate(8deg) scale(1.05);
        /* 更柔和的LOGO动画 */
    }

    .nav-brand span {
        font-size: 1.5rem;
        font-weight: 600;
        color: var(--primary-blue);
        letter-spacing: 0.8px;
        text-shadow: 1px 1px 2px rgba(42, 92, 190, 0.1);
    }

    /* 导航菜单重构 (结合网页3的B端设计原则) */

    .nav-menu {
        display: flex;
        gap: 2rem;
        margin-left: 35vw;
        margin-right: 0;
        padding-left: 0;
        list-style: none;
        position: relative;
    }

    .nav-menu::after {

        /* 添加医疗蓝分隔线 */
        content: '';
        position: absolute;
        left: -2rem;
        top: 50%;
        transform: translateY(-50%);
        height: 30px;
        width: 1px;
        background: rgba(42, 92, 190, 0.15);
        bottom: 8px;
    }

    .nav-menu a {
        color: var(--text-primary);
        text-decoration: none;
        font-size: 1.15rem;
        padding: 1rem 0;
        position: relative;
        display: flex;
        align-items: center;
        gap: 8px;
        transition: all 0.3s ease;
    }

    .nav-menu a::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 50%;
        transform: translateX(-50%);
        width: 0;
        height: 2.5px;
        background: var(--primary-blue);
        transition: width 0.4s ease, opacity 0.3s ease;
        border-radius: 2px;
    }

    .nav-menu a:hover::after {
        width: calc(100% + 16px);
        /* 扩展下划线覆盖图标区域 */
        opacity: 0.9;
    }

    /* 当前激活状态 (结合网页4的选中指示) */

    .nav-menu a.active {
        color: var(--primary-blue);
        font-weight: 500;
    }

    .nav-menu a.active::after {
        width: calc(100% + 16px);
        background: linear-gradient(90deg, #2A5CBE 30%, #4A7CD4);
        opacity: 1;
    }

    /* 响应式适配 (参考网页5的移动端方案) */

    @media (max-width: 768px) {
        .nav-menu {
            gap: 1.5rem;
            position: fixed;
            top: 70px;
            right: -100%;
            flex-direction: column;
            background: rgba(255, 255, 255, 0.98);
            width: 70%;
            padding: 2rem 1.5rem;
            box-shadow: -8px 8px 30px rgba(42, 92, 190, 0.1);
            transition: right 0.3s ease;
        }

        .nav-menu.active {
            right: 0;
        }

        .nav-menu::after {
            display: none;
        }

        /* 添加汉堡菜单 */
        .hamburger {
            display: block;
            margin-left: auto;
            cursor: pointer;
            padding: 8px;
        }

        .hamburger span {
            display: block;
            width: 28px;
            height: 2px;
            background: var(--primary-blue);
            margin: 6px 0;
            transition: 0.3s;
        }

        .hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(6px, 6px);
        }

        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }

        .hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(6px, -6px);
        }
    }

    .introduction {
        position: relative;
        margin-top: 80px;
        min-height: 40vh;
        display: flex;
        overflow: hidden;
    }

    /* 图片容器（左侧半屏） */

    .introduction-photo {
        position: relative;
        width: 50vw;
        height: 30vw;
    }

    .introduction-photo img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        object-position: left center;
    }

    .introduction-photo::after {
        content: '';
        position: absolute;
        top: 0;
        left: 0%;
        width: 200%;
        height: 100%;
        background: linear-gradient(-90deg, rgba(42, 92, 190, 1) 50%, rgba(42, 92, 190, 0.7) 70%, rgba(42, 92, 190, 0.5) 81%, rgba(42, 92, 190, 0.0) 95%);
        z-index: 1;
    }

    .introduction-text {
        position: absolute;
        right: 0;
        top: 50%;
        transform: translateY(-50%);
        width: 45%;
        padding: 3rem;
        background: linear-gradient(to right, rgba(255, 255, 255, 0.9) 60%, rgba(255, 255, 255, 0.4));
        backdrop-filter: blur(5px);
        z-index: 2;
        border-radius: 12px 0 0 12px;
        box-shadow: -8px 8px 30px rgba(42, 92, 190, 0.1);
    }

    .introduction-text h1 {
        font-size: 2.8rem;
        color: var(--primary-blue);
        line-height: 1.2;
        margin-bottom: 2rem;
        position: relative;
    }

    .introduction-text h1::after {
        content: '';
        position: absolute;
        bottom: -1rem;
        left: 0;
        width: 60px;
        height: 3px;
        background: var(--primary-blue);
    }

    .introduction-text p {
        font-size: 1.1rem;
        line-height: 1.8;
        margin-bottom: 1.5rem;
        position: relative;
        padding-left: 2rem;
    }

    .introduction-text p::before {
        content: '✚';
        /* 医疗十字符号 */
        position: absolute;
        left: 0;
        color: var(--primary-blue);
        font-size: 1.2rem;
    }

    /* 页脚设计 (参考网页15-17页脚规范) */

    .footer {
        background: var(--primary-blue);
        padding: 2rem 5%;
        text-align: center;
        margin-top: auto;
    }

    .footer p {
        color: rgba(255, 255, 255, 0.9);
        margin: 0;
        font-size: 0.9rem;
    }

    /* 上传区域主容器 (参考网页4的布局优化) */

    .upload {
        display: flex;
        min-height: 500px;
        gap: 2rem;
        padding: 3rem 5%;
        background: white;
        border-radius: 20px;
        box-shadow: 0 15px 40px -10px rgba(42, 92, 190, 0.1);
        margin: 4rem 0;
    }

    /* 说明区域增强设计 (参考网页4的卡片设计) */

    .upload-cue {
        flex: 0 0 35%;
        display: flex;
        flex-direction: column;
        justify-content: center;
        padding-right: 3rem;
        border-right: 2px solid rgba(42, 92, 190, 0.1);
    }

    .upload-cue h1 {
        font-size: 2.2rem;
        color: var(--primary-blue);
        margin-bottom: 1.5rem;
        position: relative;
        padding-bottom: 1rem;
    }

    .upload-cue h1::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 10%;
        transform: translateX(-50%);
        width: 100px;
        height: 3px;
        background: var(--primary-blue);
    }

    .upload-cue p {
        color: #4a5568;
        font-size: 1rem;
        line-height: 1.8;
        max-width: 100%;
    }

    /* 上传卡片交互优化 (参考网页6的拖拽交互) */

    .upload-card {
        flex: 1;
        display: flex;
        align-items: center;
        justify-content: center;
        position: relative;
        transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

    /* 悬停/拖拽状态 (参考网页7的交互反馈) */

    .upload-wrapper {
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        width: 100%;
        height: 320px;
        border: 2px dashed var(--primary-blue);
        border-radius: 16px;
        background: rgba(42, 92, 190, 0.03);
        cursor: pointer;
        transition: all 0.3s ease;
        position: relative;
        overflow: hidden;
        padding: 2rem;
    }

    .upload-wrapper:hover,
    .upload-wrapper.drag-over {
        background: rgba(42, 92, 190, 0.05);
        border-color: #1a4a9e;
        transform: translateY(-2px);
        box-shadow: 0 10px 25px -5px var(--shadow-color);
    }

    .upload-wrapper.has-files {
        background: rgba(42, 92, 190, 0.05);
        border-color: #1a4a9e;
    }

    #medical-upload {
        display: none;
    }

    #selected-files {
        width: 100%;
        margin-top: 1.5rem;
        display: flex;
        flex-direction: column;
        gap: 10px;
    }

    .file-item {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 0.8rem 1rem;
        background-color: rgba(42, 92, 190, 0.08);
        border-radius: 8px;
        box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
        transition: all 0.3s ease;
    }

    .file-item:hover {
        background-color: rgba(42, 92, 190, 0.12);
        transform: translateX(2px);
    }

    .file-name {
        font-weight: 500;
        color: var(--primary-blue);
        max-width: 70%;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }

    .file-size {
        color: #4a5568;
        font-size: 0.85rem;
        margin-left: auto;
        margin-right: 10px;
    }

    .remove-file {
        background: none;
        border: none;
        color: #e74c3c;
        font-size: 1.2rem;
        font-weight: bold;
        cursor: pointer;
        padding: 0 0.5rem;
        transition: transform 0.2s;
    }

    .remove-file:hover {
        transform: scale(1.2);
    }

    /* 上传步骤显示 */
    .upload-steps {
        display: flex;
        justify-content: space-between;
        margin-top: 2rem;
    }

    .step {
        display: flex;
        flex-direction: column;
        align-items: center;
        width: 30%;
        position: relative;
    }

    .step:not(:last-child)::after {
        content: '';
        position: absolute;
        top: 20px;
        right: -20%;
        width: 40%;
        height: 2px;
        background: rgba(42, 92, 190, 0.2);
    }

    .step-number {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 40px;
        height: 40px;
        background: var(--primary-blue);
        color: white;
        border-radius: 50%;
        font-size: 1.2rem;
        font-weight: 600;
        margin-bottom: 1rem;
        box-shadow: 0 4px 10px rgba(42, 92, 190, 0.2);
    }

    .step-text {
        text-align: center;
        color: var(--text-primary);
        font-size: 0.9rem;
        font-weight: 500;
    }

    /* 添加状态样式 */
    .upload-wrapper.has-files {
        height: auto;
        min-height: 150px;
        padding: 1.5rem;
    }

    /* 增强上传按钮样式 */
    .upload-button {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 10px;
    }

    .upload-button::before {
        content: '▶';
        font-size: 0.8rem;
    }

    /* 移动端适配 */
    @media (max-width: 768px) {
        .upload-steps {
            flex-direction: column;
            gap: 1.5rem;
            align-items: flex-start;
        }

        .step {
            width: 100%;
            flex-direction: row;
            gap: 1rem;
            align-items: center;
        }

        .step:not(:last-child)::after {
            display: none;
        }

        .step-number {
            margin-bottom: 0;
            width: 36px;
            height: 36px;
            font-size: 1rem;
        }
    }

    .upload-button {
        width: 100%;
        margin-top: 1rem;
        padding: 0.9rem;
        background-color: var(--primary-blue);
        color: white;
        border: none;
        border-radius: 8px;
        font-weight: 500;
        font-size: 1rem;
        cursor: pointer;
        transition: all 0.3s;
        box-shadow: 0 4px 6px rgba(42, 92, 190, 0.2);
    }

    .upload-button:hover {
        background-color: #1a4a9e;
        transform: translateY(-2px);
        box-shadow: 0 6px 8px rgba(42, 92, 190, 0.25);
    }

    .error-message {
        padding: 0.8rem 1rem;
        margin-top: 1rem;
        background-color: #fff5f5;
        color: #c53030;
        border-left: 4px solid #e53e3e;
        border-radius: 4px;
        font-size: 0.9rem;
        width: 100%;
        box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
    }

    /* 全屏加载状态 */
    .loading-overlay {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background-color: rgba(26, 32, 44, 0.7);
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        z-index: 9999;
        backdrop-filter: blur(4px);
    }

    .loading-spinner {
        width: 60px;
        height: 60px;
        border: 5px solid rgba(255, 255, 255, 0.2);
        border-radius: 50%;
        border-top-color: var(--primary-blue);
        animation: spin 1s linear infinite;
        margin-bottom: 1.5rem;
    }

    .loading-overlay p {
        color: white;
        font-size: 1.1rem;
        text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
        margin-top: 1rem;
        font-weight: 500;
    }

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

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

    /* 拖拽提示样式 */
    .upload-wrapper.drag-over::after {
        content: "释放上传文件";
        position: absolute;
        bottom: 0;
        left: 0;
        right: 0;
        background: var(--primary-blue);
        color: white;
        padding: 0.8rem;
        font-size: 0.9rem;
        text-align: center;
        animation: slideUp 0.3s ease;
    }

    /* 进度条 */
    .upload-progress {
        width: 100%;
        height: 6px;
        background-color: rgba(42, 92, 190, 0.1);
        border-radius: 3px;
        margin-top: 1rem;
        overflow: hidden;
    }

    .upload-progress-bar {
        height: 100%;
        background-color: var(--primary-blue);
        width: 0%;
        transition: width 0.3s ease;
    }

    /* 移动端适配 */
    @media (max-width: 768px) {
        .upload-wrapper {
            height: 260px;
        }

        .file-item {
            padding: 0.6rem 0.8rem;
        }

        .file-name {
            max-width: 60%;
            font-size: 0.9rem;
        }
    }

    /* ====================== */
    /* 架构优势模块 */
    /* ====================== */

    .architecture-advantages {
        padding: 4rem 5%;
        background: rgba(255, 255, 255, 0.98);
        border-radius: 20px;
        box-shadow: 0 15px 40px -10px var(--shadow-color);
        margin: 4rem 0;
    }

    .architecture-advantages h1 {
        font-size: 2.4rem;
        color: var(--primary-blue);
        text-align: center;
        margin-bottom: 3rem;
        position: relative;
    }

    .architecture-advantages h1::after {
        content: '';
        position: absolute;
        bottom: -1rem;
        left: 50%;
        transform: translateX(-50%);
        width: 120px;
        height: 3px;
        background: var(--primary-blue);
    }

    .dual-column-layout {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
        gap: 3rem;
        margin-top: 2rem;
    }

    .algorithm-diagram {
        position: relative;
        border-radius: 16px;
        overflow: hidden;
        background: white;
        box-shadow: 0 8px 25px -5px var(--shadow-color);
    }

    .algorithm-diagram img {
        width: 100%;
        height: 320px;
        object-fit: contain;
        padding: 1.5rem;
        background: var(--background-light);
        border-bottom: 2px solid rgba(42, 92, 190, 0.1);
    }

    .diagram-caption {
        padding: 2rem;
    }

    .diagram-caption h3 {
        color: var(--primary-blue);
        font-size: 1.4rem;
        margin-bottom: 1rem;
    }

    .diagram-caption ul {
        list-style: none;
        padding-left: 1.5rem;
    }

    .diagram-caption li {
        position: relative;
        padding-left: 1.5rem;
        margin: 1rem 0;
        color: var(--text-primary);
        line-height: 1.6;
    }

    .diagram-caption li::before {
        content: '▶';
        position: absolute;
        left: 0;
        color: var(--primary-blue);
        font-size: 0.8rem;
    }

    /* ====================== */
    /* 部署优势模块 */
    /* ====================== */

    .deployment-benefits {
        padding: 3rem 5%;
        background: rgba(248, 250, 252, 0.9);
    }

    .benefit-cards {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        gap: 2rem;
        max-width: 1200px;
        margin: 2rem auto;
    }

    .benefit-card {
        background: white;
        padding: 2rem;
        border-radius: 12px;
        box-shadow: 0 8px 25px -5px var(--shadow-color);
    }

    .metric-header {
        display: flex;
        justify-content: space-between;
        align-items: baseline;
        margin-bottom: 1.5rem;
    }

    .metric-label {
        color: var(--text-primary);
        font-size: 0.95rem;
    }

    .metric-value {
        color: var(--primary-blue);
        font-size: 1.8rem;
        font-weight: 600;
    }

    .comparison-bar {
        height: 40px;
        border-radius: 20px;
        overflow: hidden;
        position: relative;
        background: rgba(42, 92, 190, 0.1);
    }

    .traditional-bar,
    .our-bar {
        height: 100%;
        display: flex;
        align-items: center;
        padding: 0 1rem;
        font-size: 0.9rem;
        color: white;
        transition: width 0.6s ease;
    }

    .traditional-bar {
        background: #718096;
        width: 80%;
    }

    .our-bar {
        background: var(--primary-blue);
        width: 20%;
        justify-content: flex-end;
    }

    .tech-specs {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
        margin: 1.5rem 0;
    }

    .spec-item {
        text-align: center;
        padding: 1rem;
        background: rgba(42, 92, 190, 0.05);
        border-radius: 8px;
    }

    .spec-label {
        display: block;
        color: var(--text-primary);
        font-size: 0.9rem;
        margin-bottom: 0.5rem;
    }

    .spec-value {
        color: var(--primary-blue);
        font-size: 1.4rem;
        font-weight: 600;
    }

    .deployment-scenarios {
        display: flex;
        justify-content: space-around;
        gap: 1rem;
        margin-top: 1.5rem;
    }

    .scenario {
        padding: 0.6rem 1.2rem;
        background: var(--primary-blue);
        color: white;
        border-radius: 20px;
        font-size: 0.9rem;
    }

    /* ====================== */
    /* 技术验证模块 */
    /* ====================== */

    .tech-validation {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        gap: 3rem;
        padding: 3rem 5%;
        max-width: 1200px;
        margin: 0 auto;
    }

    .validation-item {
        background: white;
        padding: 2rem;
        border-radius: 12px;
        box-shadow: 0 8px 25px -5px var(--shadow-color);
    }

    .validation-item h3 {
        color: var(--primary-blue);
        margin-bottom: 1.5rem;
        font-size: 1.3rem;
    }

    .resolution-scale {
        display: flex;
        justify-content: space-between;
        align-items: center;
        margin: 2rem 0;
    }

    .scale-point {
        position: relative;
        padding-top: 1.5rem;
        color: var(--text-primary);
    }

    .scale-point::before {
        content: '';
        position: absolute;
        top: 0;
        left: 50%;
        transform: translateX(-50%);
        width: 12px;
        height: 12px;
        background: var(--primary-blue);
        border-radius: 50%;
    }

    .scale-line {
        flex: 1;
        height: 2px;
        background: rgba(42, 92, 190, 0.2);
        margin: 0 0.5rem;
    }

    .stage-allocation {
        height: 8px;
        background: rgba(42, 92, 190, 0.1);
        border-radius: 4px;
        overflow: hidden;
        margin: 2rem 0;
    }

    .stage {
        height: 100%;
        display: inline-block;
        background: var(--primary-blue);
        transition: width 0.6s ease;
    }

    .stage-percent {
        display: block;
        text-align: center;
        color: var(--primary-blue);
        font-weight: 600;
        margin-top: 0.5rem;
    }

    /* 响应式适配 */

    @media (max-width: 768px) {
        .dual-column-layout {
            grid-template-columns: 1fr;
        }

        .algorithm-diagram img {
            height: 240px;
        }

        .deployment-scenarios {
            flex-direction: column;
        }

        .tech-validation {
            gap: 2rem;
        }
    }

    /* 成功消息样式 */
    .success-message {
        padding: 0.8rem 1rem;
        margin-top: 1rem;
        background-color: #f0fff4;
        color: #276749;
        border-left: 4px solid #38a169;
        border-radius: 4px;
        font-size: 0.9rem;
        width: 100%;
        box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
        animation: fadeIn 0.3s ease;
    }

    .success-message strong,
    .error-message strong {
        font-weight: 600;
        margin-right: 5px;
    }

    @keyframes fadeIn {
        from {
            opacity: 0;
            transform: translateY(-10px);
        }

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

    /* 添加一些悬浮效果到按钮和交互元素 */
    .remove-file,
    .upload-button,
    .step-number {
        transition: all 0.2s ease-in-out;
    }

    .remove-file:hover,
    .upload-button:hover,
    .step:hover .step-number {
        transform: scale(1.05);
    }

    .upload-button:disabled {
        background-color: #a0aec0;
        cursor: not-allowed;
        transform: none;
        box-shadow: none;
    }

    /* 文件上传区域状态提示 */
    .upload-wrapper::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        height: 4px;
        background: linear-gradient(to right, var(--primary-blue), #4299e1);
        border-radius: 4px 4px 0 0;
        transform: scaleX(0);
        transform-origin: left;
        transition: transform 0.3s ease;
    }

    .upload-wrapper.has-files::before {
        transform: scaleX(1);
    }

    .upload-wrapper.has-files img {
        height: 60px;
        width: 60px;
        margin-bottom: 1rem;
    }

    /* 添加一些文字提示 */
    .upload-hint {
        display: block;
        text-align: center;
        color: #718096;
        font-size: 0.85rem;
        margin-top: 0.5rem;
    }

    /* 文件选择器样式增强 */
    #medical-upload:focus+.upload-wrapper {
        border-color: var(--primary-blue);
        box-shadow: 0 0 0 3px rgba(42, 92, 190, 0.3);
        outline: none;
    }

    /* 拖放区域增强 */
    .drop-zone-overlay {
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(42, 92, 190, 0.9);
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        color: white;
        font-size: 1.2rem;
        font-weight: 500;
        border-radius: 12px;
        opacity: 0;
        pointer-events: none;
        transition: opacity 0.3s ease;
        z-index: 10;
    }

    .upload-wrapper.drag-over .drop-zone-overlay {
        opacity: 1;
    }

    .drop-zone-icon {
        width: 60px;
        height: 60px;
        border: 3px dashed white;
        border-radius: 50%;
        margin-bottom: 1rem;
        position: relative;
    }

    .drop-zone-icon::after {
        content: '↓';
        font-size: 2rem;
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
    }

    /* 上传帮助文本 */
    .upload-help-text {
        margin-top: 1rem;
        text-align: center;
        color: #718096;
        font-size: 0.9rem;
        max-width: 90%;
        margin-left: auto;
        margin-right: auto;
    }

    .upload-help-text p {
        margin: 0.5rem 0;
    }

    /* 文件上传后样式调整 */
    .upload-wrapper.has-files .upload-hint {
        display: none;
    }

    /* 文件列表样式增强 */
    #selected-files {
        width: 100%;
        transition: all 0.3s ease;
        max-height: 0;
        overflow: hidden;
    }

    .upload-wrapper.has-files #selected-files {
        max-height: 300px;
        overflow-y: auto;
        margin-top: 1.5rem;
    }

    /* 添加焦点样式以提高可访问性 */
    .upload-wrapper:focus-within {
        outline: none;
        border-color: var(--primary-blue);
        box-shadow: 0 0 0 3px rgba(42, 92, 190, 0.3);
    }

    /* 调整文件项间距 */
    .file-item+.file-item {
        margin-top: 0.5rem;
    }

    /* 连接父级排列 */
    .file-item {
        transition: all 0.3s ease;
    }

    .file-item:hover {
        transform: translateX(5px);
    }

    /* 响应式调整 */
    @media (max-width: 768px) {
        .drop-zone-icon {
            width: 50px;
            height: 50px;
        }

        .drop-zone-overlay {
            font-size: 1rem;
        }

        .upload-help-text {
            font-size: 0.8rem;
        }
    }

    /* 测试文件下载样式 */

    /* 上传容器改为弹性布局 */
    .upload-container {
        flex: 1;
        display: flex;
        gap: 30px;
    }

    /* 调整上传卡片宽度 */
    .upload-card {
        flex: 1;
        min-width: 0;
        /* 修复弹性布局溢出问题 */
    }

    /* 测试文件卡片 */
    .test-files-card {
        flex: 0 0 320px;
        background: white;
        border-radius: 16px;
        box-shadow: 0 10px 30px rgba(42, 92, 190, 0.1);
        padding: 1.5rem;
        display: flex;
        flex-direction: column;
        transition: all 0.3s ease;
        position: relative;
        overflow: hidden;
    }

    .test-files-card::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        height: 4px;
        background: linear-gradient(to right, #3182ce, #63b3ed);
        border-radius: 4px 4px 0 0;
    }

    .test-files-card:hover {
        transform: translateY(-5px);
        box-shadow: 0 15px 35px rgba(42, 92, 190, 0.15);
    }

    /* 测试文件头部 */
    .test-files-header {
        margin-bottom: 1.5rem;
        padding-bottom: 1rem;
        border-bottom: 1px solid rgba(42, 92, 190, 0.1);
    }

    .test-files-header h3 {
        color: var(--primary-blue);
        font-size: 1.3rem;
        margin: 0 0 0.5rem 0;
    }

    .test-files-header p {
        color: #4a5568;
        font-size: 0.9rem;
        margin: 0;
        line-height: 1.5;
    }

    /* 测试文件列表 */
    .test-files-list {
        flex: 1;
        display: flex;
        flex-direction: column;
        gap: 15px;
        margin-bottom: 1.5rem;
    }

    /* 测试文件项 */
    .test-file-item {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 0.8rem;
        background: rgba(42, 92, 190, 0.05);
        border-radius: 8px;
        transition: all 0.3s ease;
    }

    .test-file-item:hover {
        background: rgba(42, 92, 190, 0.08);
        transform: translateX(5px);
    }

    .test-file-info {
        display: flex;
        align-items: center;
        gap: 12px;
    }

    .test-file-icon {
        width: 36px;
        height: 36px;
        border-radius: 6px;
        background: rgba(42, 92, 190, 0.1);
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .file-icon {
        display: inline-block;
        width: 20px;
        height: 24px;
        background: var(--primary-blue);
        position: relative;
        border-radius: 3px;
    }

    .file-icon::before {
        content: '';
        position: absolute;
        top: 0;
        right: 0;
        width: 6px;
        height: 6px;
        background: white;
        clip-path: polygon(0 0, 100% 0, 100% 100%);
    }

    .file-icon::after {
        content: '.nii';
        position: absolute;
        bottom: 4px;
        left: 50%;
        transform: translateX(-50%);
        font-size: 6px;
        color: white;
        font-weight: bold;
    }

    .test-file-details {
        display: flex;
        flex-direction: column;
    }

    .test-file-name {
        font-weight: 500;
        color: var(--text-primary);
        font-size: 0.95rem;
    }

    .test-file-size {
        color: #718096;
        font-size: 0.8rem;
    }

    /* 下载按钮 */
    .download-btn {
        background: var(--primary-blue);
        color: white;
        border: none;
        padding: 0.5rem 1rem;
        border-radius: 6px;
        font-size: 0.9rem;
        font-weight: 500;
        cursor: pointer;
        transition: all 0.3s ease;
        text-decoration: none;
        display: inline-block;
    }

    .download-btn:hover {
        background: #2a4a96;
        transform: translateY(-2px);
        box-shadow: 0 4px 8px rgba(42, 92, 190, 0.2);
    }

    .download-btn:active {
        transform: translateY(0);
    }

    /* 免责声明 */
    .test-files-disclaimer {
        margin-top: auto;
        padding-top: 1rem;
        border-top: 1px solid rgba(42, 92, 190, 0.1);
    }

    .test-files-disclaimer p {
        color: #e53e3e;
        font-size: 0.8rem;
        margin: 0;
        line-height: 1.5;
    }

    /* 下载动画效果 */
    @keyframes downloadPulse {
        0% {
            box-shadow: 0 0 0 0 rgba(42, 92, 190, 0.4);
        }

        70% {
            box-shadow: 0 0 0 8px rgba(42, 92, 190, 0);
        }

        100% {
            box-shadow: 0 0 0 0 rgba(42, 92, 190, 0);
        }
    }

    .download-btn.downloading {
        animation: downloadPulse 1.5s infinite;
        background: #4299e1;
    }

    /* 响应式调整 */
    @media (max-width: 1024px) {
        .upload-container {
            flex-direction: column;
        }

        .test-files-card {
            flex: 0 0 auto;
            width: 100%;
        }
    }

    /* 下载进度条 */
    .download-progress-container {
        position: fixed;
        bottom: 20px;
        right: 20px;
        background: white;
        border-radius: 8px;
        box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
        padding: 15px;
        width: 300px;
        z-index: 1000;
        display: none;
    }

    .download-progress-container.active {
        display: block;
        animation: slideIn 0.3s ease;
    }

    .download-progress-header {
        display: flex;
        justify-content: space-between;
        margin-bottom: 10px;
    }

    .download-progress-title {
        font-weight: 500;
        color: var(--text-primary);
    }

    .close-progress {
        background: none;
        border: none;
        cursor: pointer;
        color: #718096;
    }

    .download-progress-bar {
        height: 6px;
        background: #e2e8f0;
        border-radius: 3px;
        overflow: hidden;
    }

    .download-progress-value {
        height: 100%;
        background: var(--primary-blue);
        width: 0%;
        transition: width 0.3s ease;
    }

    .download-status {
        display: flex;
        justify-content: space-between;
        margin-top: 8px;
        font-size: 0.8rem;
        color: #718096;
    }

    @keyframes slideIn {
        from {
            transform: translateX(100%);
            opacity: 0;
        }

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

    /* 下载成功提示框 */
    .download-success-modal {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0.6);
        backdrop-filter: blur(4px);
        display: flex;
        align-items: center;
        justify-content: center;
        z-index: 2000;
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
    }

    .download-success-modal.active {
        opacity: 1;
        visibility: visible;
    }

    .download-success-content {
        background: white;
        border-radius: 16px;
        width: 90%;
        max-width: 450px;
        padding: 2rem;
        text-align: center;
        box-shadow: 0 15px 50px rgba(0, 0, 0, 0.2);
        transform: translateY(20px);
        transition: transform 0.3s ease;
    }

    .download-success-modal.active .download-success-content {
        transform: translateY(0);
    }

    .download-success-icon {
        width: 64px;
        height: 64px;
        background: #38a169;
        color: white;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 2rem;
        margin: 0 auto 1.5rem;
        box-shadow: 0 5px 15px rgba(56, 161, 105, 0.4);
    }

    .download-success-content h3 {
        color: var(--primary-blue);
        font-size: 1.5rem;
        margin: 0 0 1rem;
    }

    .download-success-content p {
        color: var(--text-primary);
        margin: 0.5rem 0;
    }

    .download-success-content ul {
        text-align: left;
        padding-left: 1.5rem;
        margin: 1rem 0;
    }

    .download-success-content li {
        margin: 0.5rem 0;
        color: var(--text-primary);
        line-height: 1.5;
    }

    .test-file-usage {
        background: #fffaf0;
        border-left: 4px solid #ed8936;
        padding: 1rem;
        margin: 1.5rem 0;
        text-align: left;
        border-radius: 4px;
    }

    .test-file-usage p {
        color: #c05621;
        font-size: 0.9rem;
        margin: 0;
    }

    .close-success-modal {
        background: var(--primary-blue);
        color: white;
        border: none;
        padding: 0.8rem 2rem;
        border-radius: 8px;
        font-size: 1rem;
        font-weight: 500;
        margin-top: 1.5rem;
        cursor: pointer;
        transition: all 0.3s ease;
    }

    .close-success-modal:hover {
        background: #2a4a96;
        transform: translateY(-2px);
        box-shadow: 0 4px 8px rgba(42, 92, 190, 0.2);
    }

    /* 响应式调整 */
    @media (max-width: 480px) {
        .download-success-content {
            padding: 1.5rem;
        }

        .download-success-icon {
            width: 56px;
            height: 56px;
            font-size: 1.8rem;
        }

        .download-success-content h3 {
            font-size: 1.3rem;
        }

        .close-success-modal {
            width: 100%;
        }
    }

    /* 下载按钮悬停效果增强 */
    .download-btn {
        position: relative;
        overflow: hidden;
    }

    .download-btn::after {
        content: '';
        position: absolute;
        top: 50%;
        left: 50%;
        width: 5px;
        height: 5px;
        background: rgba(255, 255, 255, 0.3);
        opacity: 0;
        border-radius: 100%;
        transform: scale(1, 1) translate(-50%, -50%);
        transform-origin: 50% 50%;
    }

    .download-btn:hover::after {
        animation: ripple 1s ease-out;
    }

    @keyframes ripple {
        0% {
            transform: scale(0, 0) translate(-50%, -50%);
            opacity: 0.5;
        }

        100% {
            transform: scale(20, 20) translate(-50%, -50%);
            opacity: 0;
        }
    }