/* RESET & GLOBAL */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            background: #f5f7fa;
            font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            line-height: 1.5;
            padding: 40px 20px;
        }

        .case-study {
            max-width: 1100px;
            margin: 0 auto;
            background: #ffffff;
            border-radius: 24px;
            box-shadow: 0 20px 35px -12px rgba(0,0,0,0.08);
            padding: 32px 28px;
        }

        .case-study h1 {
            font-size: 28px;
            font-weight: 700;
            letter-spacing: -0.01em;
            margin-bottom: 16px;
            margin-top: 0;
            color: #0a2540;
            border-left: 5px solid #0066cc;
            padding-left: 20px;
        }

        .case-study h1:not(:first-of-type) {
            margin-top: 40px;
        }

        .case-study p,
        .case-study li,
        .case-study span {
            font-size: 16px;
            line-height: 1.6;
            color: #2c3e44;
        }

        .case-study .section {
            margin-bottom: 0;
        }

        .case-study ul {
            margin: 16px 0 8px 28px;
        }

        .case-study li {
            margin: 8px 0;
        }

        /* 单张卡片居中布局 */
        .cards-row-single {
            display: flex;
            justify-content: center;
            gap: 30px;
            flex-wrap: wrap;
            margin: 28px 0 24px 0;
        }

        .product-full-card {
            max-width: 480px;
            width: 100%;
            background: #ffffff;
            border-radius: 20px;
            box-shadow: 0 8px 20px rgba(0,0,0,0.05), 0 2px 4px rgba(0,0,0,0.02);
            border: 1px solid #eef2f8;
            transition: all 0.2s ease;
            overflow: hidden;
        }

        .product-image-box {
            width: 100%;
            height: 280px;
            background: #f8fafc;
            display: flex;
            align-items: center;
            justify-content: center;
            overflow: hidden;
            position: relative;
        }

        .product-image-box img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            display: block;
            transition: transform 0.2s ease;
        }

        .zoom-btn {
            position: absolute;
            bottom: 12px;
            right: 12px;
            background: rgba(0,0,0,0.65);
            color: white;
            border: none;
            border-radius: 30px;
            width: 36px;
            height: 36px;
            font-size: 18px;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all 0.2s;
            backdrop-filter: blur(4px);
            z-index: 10;
        }
        .zoom-btn:hover {
            background: #0066cc;
            transform: scale(1.05);
        }

        .product-content {
            padding: 18px 20px;
            text-align: center;
        }

        .product-content strong {
            display: block;
            margin-bottom: 12px;
            font-size: 16px;
            font-weight: 600;
        }

        .product-content a {
            color: #0066cc;
            text-decoration: none;
        }
        .product-content a:hover {
            text-decoration: underline;
        }

        .product-full-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 14px 28px rgba(0,0,0,0.08);
            border-color: #dce5ef;
        }

        /* 横向滚动图片区域 */
        .production-images-scroll {
            margin-top: 20px;
            overflow-x: auto;
            overflow-y: hidden;
            white-space: nowrap;
            scroll-behavior: smooth;
            -webkit-overflow-scrolling: touch;
            padding-bottom: 8px;
        }
        .production-images-scroll::-webkit-scrollbar {
            height: 8px;
        }
        .production-images-scroll::-webkit-scrollbar-track {
            background: #eef2f8;
            border-radius: 10px;
        }
        .production-images-scroll::-webkit-scrollbar-thumb {
            background: #cbd5e1;
            border-radius: 10px;
        }
        .production-images-scroll::-webkit-scrollbar-thumb:hover {
            background: #94a3b8;
        }
        .scroll-images-wrapper {
            display: inline-flex;
            gap: 20px;
            white-space: nowrap;
        }
        .scroll-images-wrapper img {
            width: 280px;
            height: 220px;
            object-fit: cover;
            border-radius: 16px;
            border: 1px solid #eef2f8;
            background: #f8fafc;
            cursor: pointer;
            transition: transform 0.2s ease;
            white-space: normal;
        }
        .scroll-images-wrapper img:hover {
            transform: scale(1.02);
        }

        /* Instagram 照片样式 - 缩小居中 */
        .instagram-wrapper {
            text-align: center;
            margin: 20px 0;
        }
        .instagram-link {
            display: inline-block;
            max-width: 500px;
            width: 100%;
            border-radius: 16px;
            overflow: hidden;
            transition: transform 0.2s ease;
            cursor: pointer;
        }
        .instagram-link:hover {
            transform: scale(1.01);
        }
        .instagram-wrapper img {
            max-width: 500px;
            width: 100%;
            height: auto;
            display: block;
            border-radius: 16px;
            border: 1px solid #eef2f8;
            margin: 0 auto;
            cursor: pointer;
        }
        .instagram-caption {
            margin-top: 10px;
            font-size: 14px;
            color: #0066cc;
            text-decoration: none;
            display: inline-block;
        }
        .instagram-caption:hover {
            text-decoration: underline;
        }

        .feedback-video {
            margin: 20px 0;
            border-radius: 16px;
            overflow: hidden;
            background: #000;
            text-align: center;
        }
        .feedback-video video {
            width: 100%;
            max-width: 700px;
            height: auto;
            border-radius: 16px;
            display: block;
            margin: 0 auto;
        }
        @media (max-width: 700px) {
            .case-study {
                padding: 20px 18px;
            }
            .scroll-images-wrapper img {
                width: 220px;
                height: 180px;
            }
        }

        /* 联系卡片样式 */
        .contact-card {
            background: linear-gradient(135deg, #f0f7ff 0%, #e8f0fe 100%);
            border-radius: 20px;
            padding: 32px 28px;
            margin-top: 24px;
            border: 1px solid #dce8f5;
            text-align: center;
        }
        .contact-card p {
            margin-bottom: 20px;
        }

        .contact-row {
            display: flex;
            justify-content: center;
            gap: 40px;
            flex-wrap: wrap;
            margin: 20px 0 10px;
        }
        .contact-item {
            font-size: 16px;
            color: #2c3e44;
        }
        .contact-item strong {
            font-weight: 600;
            color: #0a2540;
        }
        .contact-item a {
            color: #0066cc;
            text-decoration: none;
        }
        .contact-item a:hover {
            text-decoration: underline;
        }

        @media (max-width: 550px) {
            .contact-row {
                gap: 16px;
                flex-direction: column;
                align-items: center;
            }
        }

        .cta {
            display: inline-block;
            margin-top: 24px;
            padding: 12px 28px;
            background: #0066cc;
            color: #fff;
            text-decoration: none;
            border-radius: 40px;
            font-weight: 500;
            font-size: 16px;
            transition: background 0.2s;
            box-shadow: 0 2px 6px rgba(0,102,204,0.2);
            border: none;
            cursor: pointer;
        }
        .cta:hover {
            background: #004d99;
            text-decoration: none;
        }

        /* Lightbox Modal */
        .image-modal {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.92);
            z-index: 9999;
            justify-content: center;
            align-items: center;
            cursor: pointer;
            backdrop-filter: blur(6px);
        }

        .image-modal.active {
            display: flex;
            animation: fadeIn 0.2s ease;
        }

        .modal-img {
            max-width: 90%;
            max-height: 90%;
            object-fit: contain;
            border-radius: 12px;
            box-shadow: 0 20px 40px rgba(0,0,0,0.4);
        }

        .modal-close {
            position: absolute;
            top: 28px;
            right: 40px;
            font-size: 48px;
            font-weight: 300;
            color: white;
            cursor: pointer;
            background: transparent;
            border: none;
            line-height: 1;
        }
        .modal-close:hover {
            transform: scale(1.1);
            color: #ddd;
        }

        @keyframes fadeIn {
            from { opacity: 0; }
            to { opacity: 1; }
        }