body {
            background: #f8f3ff;  /* 浅紫色背景 */
            font-family: system-ui, 'Segoe UI', 'Roboto', 'Helvetica Neue', sans-serif;
            scroll-behavior: smooth;
        }
        /* 整体容器最大宽度750px，居中 */
        .container {
            max-width: 750px;
            width: 100%;
            margin-left: auto;
            margin-right: auto;
            padding-left: 16px;
            padding-right: 16px;
        }
        /* Hero区域 - 紫色渐变 */
        .hero-section {
            background: linear-gradient(135deg, #FF3366 0%, #6d28d9 100%);
            color: white;
            padding: 2.5rem 0 2rem 0;
            border-radius: 0 0 1.5rem 1.5rem;
            margin-bottom: 2rem;
            box-shadow: 0 8px 20px rgba(109, 40, 217, 0.2);
        }
        .card-custom {
            border: none;
            border-radius: 1.25rem;
            box-shadow: 0 8px 20px rgba(0,0,0,0.05);
            transition: transform 0.2s, box-shadow 0.2s;
            background: white;
            height: 100%;
        }
        .card-custom:hover {
            transform: translateY(-4px);
            box-shadow: 0 16px 28px rgba(109, 40, 217, 0.12);
        }
        
         .card-custom-warning {
            border: none;
            border-radius: 1.25rem;
            box-shadow: 0 8px 20px rgba(0,0,0,0.05);
            transition: transform 0.2s, box-shadow 0.2s;
            height: 100%;
        }
        .card-custom-warning:hover {
            transform: translateY(-4px);
            box-shadow: 0 16px 28px rgba(109, 40, 217, 0.12);
        }
        
        
        .badge-dim {
            background-color: #ede9fe;
            color: #FF3366;
            font-weight: 500;
            padding: 0.5rem 1rem;
            border-radius: 2rem;
        }
        .section-title {
            font-weight: 700;
            border-left: 6px solid #FF3366;
            padding-left: 1rem;
            margin: 1.5rem 0 1.2rem 0;
            color: #FF3366;
        }
        .footer-note {
            background-color: #f3e8ff;
            font-size: 0.8rem;
            color: #FF3366;
            border-radius: 1rem;
            padding:1rem;
            margin:0 1rem;
            margin-bottom: 80px;
            text-align: center;
        }
        .btn-primary-custom {
            background: #FF3366;
            border: none;
            padding: 12px 28px;
            border-radius: 40px;
            font-weight: 600;
            transition: all 0.2s;
            color: white;
        }
        .btn-primary-custom:hover {
            background: #FF3366;
            transform: scale(1.02);
            box-shadow: 0 10px 20px rgba(139, 92, 246, 0.3);
        }
        hr {
            opacity: 0.3;
        }
        .test-notice-list {
            list-style-type: none;
            padding-left: 0;
        }
        .test-notice-list li {
            margin-bottom: 0.75rem;
            padding-left: 1.8rem;
            position: relative;
        }
        .test-notice-list li i {
            position: absolute;
            left: 0;
            top: 0.2rem;
            color: #FF3366;
        }
        .dimension-icon {
            font-size: 6rem;
            color: #FF3366;
            margin-bottom: 0.5rem;
        }
        .calc-preview {
            background: linear-gradient(120deg, #faf5ff 0%, #ffffff 100%);
            border-radius: 1.5rem;
        }
        /* 模拟表单内部保持flex响应 */
        .form-row-inline {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            margin-bottom: 1.5rem;
        }
        .form-row-inline .form-group {
            flex: 1 1 calc(50% - 0.5rem);
            min-width: 140px;
        }
        
        
        .float-btn-container.show {
            opacity: 1;
            visibility: visible;
        }
        .float-btn-container {
            position: fixed;
            bottom: 10px;
            z-index: 1000;
            opacity: 0;
            visibility: hidden;
            transition: opacity 0.3s ease, visibility 0.3s ease;
            left: 50%;
            max-width: 718px;
            transform: translate(-50%);
            width: 100%;
            text-align: center;
        }


        @media (min-width: 576px) {
            .form-row-inline .form-group {
                flex: 1 1 calc(25% - 0.75rem);
            }
        }
        /* 堆叠模块间距 */
        .stacked-module {
            margin-bottom: 2rem;
        }
        @media (max-width: 576px) {
            .hero-section h1 {
                font-size: 1.8rem;
            }
            .btn-primary-custom {
                padding: 10px 20px;
            }
        }
        /* 进度条紫色 */
        .progress-bar.bg-primary {
            background-color: #FF3366 !important;
        }
        /* 链接、高亮文字 */
        a, .text-primary {
            color: #FF3366!important;
        }
        .alert-primary {
            background-color: #f5f0ff;
            border-color: #c4b5fd;
            color: #FF3366;
        }
        .border-primary {
            border-color: #FF3366 !important;
        }