* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            background-color: #f9fafb;
            padding: 32px 20px;
            margin: 0;
            color: #1f2937;
        }
        .container {
            max-width: 1000px;
            margin: 0 auto;
            background: white;
            border-radius: 28px;
            box-shadow: 0 12px 30px rgba(0,0,0,0.05);
            padding: 44px 40px 52px;
        }
        p {
            font-size: 16px;
            line-height: 1.65;
            color: #2c3e4f;
            margin-bottom: 1.2em;
        }
        .container p:first-of-type {
            margin-top: 0;
        }
        
        .section-title {
            font-size: 22px;
            font-weight: 700;
            color: #0f172a;
            margin: 1.8em 0 0.6em 0;
            padding-left: 14px;
            border-left: 4px solid #007BFF;
        }
        .section-title:first-of-type {
            margin-top: 0;
        }
        
        .divider-bold {
            margin: 48px 0 40px 0;
            border: 0;
            height: 2px;
            background: linear-gradient(to right, transparent, #cbd5e1, #94a3b8, #cbd5e1, transparent);
        }
        
        .cta-box {
            text-align: center;
            background: #ffffff;
            border-radius: 28px;
            margin-top: 36px;
            padding: 28px 24px;
            border: 1px solid #e5e7eb;
            box-shadow: 0 8px 20px rgba(0,0,0,0.03);
        }
        .cta-box p {
            margin-bottom: 20px;
            font-size: 18px;
            font-weight: 500;
        }
        .btn {
            display: inline-block;
            padding: 14px 32px;
            background-color: #007BFF;
            color: #fff;
            text-decoration: none;
            font-size: 16px;
            font-weight: 600;
            border-radius: 40px;
            transition: background 0.2s ease;
            border: none;
            cursor: pointer;
            text-align: center;
        }
        .btn:hover {
            background-color: #0056b3;
        }
        
        /* 泡沫流程图 */
        .foam-flow {
            display: flex;
            align-items: center;
            justify-content: center;
            flex-wrap: wrap;
            gap: 12px;
            margin: 32px 0 20px 0;
            background: #f8fafc;
            padding: 24px 16px;
            border-radius: 32px;
        }
        .foam-item {
            flex: 0 0 auto;
            text-align: center;
        }
        .foam-item img {
            width: 100%;
            max-width: 140px;
            height: auto;
            border-radius: 16px;
            box-shadow: 0 6px 14px rgba(0,0,0,0.1);
            display: block;
            cursor: pointer;
            transition: transform 0.2s ease;
            background: #f0f0f0;
        }
        .foam-item img:hover {
            transform: scale(1.02);
        }
        .arrow-horizontal {
            font-size: 24px;
            font-weight: 300;
            color: #007BFF;
            background: white;
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 36px;
            box-shadow: 0 2px 6px rgba(0,0,0,0.06);
            flex-shrink: 0;
        }
        
        /* 纹理展示 */
        .texture-gallery {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: center;
            gap: 12px;
            margin: 28px 0 20px 0;
        }
        .texture-card {
            flex: 0 0 auto;
            width: 130px;
            text-align: center;
            background: #f8fafc;
            padding: 12px 8px;
            border-radius: 20px;
            transition: all 0.2s ease;
        }
        .texture-card:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 16px rgba(0,0,0,0.06);
        }
        .texture-card img {
            width: 100px;
            height: 100px;
            object-fit: cover;
            border-radius: 14px;
            box-shadow: 0 4px 10px rgba(0,0,0,0.08);
            display: block;
            margin: 0 auto 10px auto;
            cursor: pointer;
            transition: transform 0.2s ease;
            background: #f0f0f0;
        }
        .texture-card img:hover {
            transform: scale(1.02);
        }
        .texture-name {
            font-size: 12px;
            font-weight: 700;
            color: #007BFF;
            background: #e6f0ff;
            display: inline-block;
            padding: 3px 12px;
            border-radius: 30px;
        }
        .texture-arrow {
            font-size: 24px;
            font-weight: 700;
            color: #007BFF;
            flex-shrink: 0;
        }
        
        /* 视频 - 延迟加载，点击才播放 */
        .video-wrapper {
            float: left;
            margin: 0 24px 16px 0;
            width: 66.666%;
            max-width: 540px;
            border-radius: 20px;
            overflow: hidden;
            box-shadow: 0 8px 20px rgba(0,0,0,0.1);
            background: #1a1a1a;
            cursor: pointer;
            position: relative;
        }
        .video-wrapper .play-btn {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 60px;
            height: 60px;
            background: rgba(0,123,255,0.9);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 28px;
            pointer-events: none;
            transition: all 0.2s;
        }
        .video-wrapper:hover .play-btn {
            background: #0056b3;
            transform: translate(-50%, -50%) scale(1.05);
        }
        .video-wrapper video {
            width: 100%;
            height: auto;
            display: block;
        }
        .clearfix::after {
            content: "";
            clear: both;
            display: table;
        }
        
        /* 灯箱遮罩层 */
        .lightbox {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0,0,0,0.92);
            z-index: 1000;
            justify-content: center;
            align-items: center;
            cursor: pointer;
        }
        .lightbox img {
            max-width: 90%;
            max-height: 85%;
            border-radius: 16px;
            box-shadow: 0 10px 40px rgba(0,0,0,0.4);
            object-fit: contain;
        }
        .lightbox.active {
            display: flex;
        }
        
        /* 图片占位背景，减少白屏 */
        .foam-item img, .texture-card img {
            background: #f0f2f5;
        }
        
        @media (max-width: 760px) {
            .container {
                padding: 24px 20px 32px;
            }
            .foam-flow {
                flex-direction: column;
            }
            .arrow-horizontal {
                transform: rotate(90deg);
                margin: 6px 0;
            }
            .texture-gallery {
                flex-direction: column;
            }
            .texture-arrow {
                transform: rotate(90deg);
                margin: 6px 0;
            }
            .video-wrapper {
                float: none;
                width: 100%;
                margin: 0 0 20px 0;
            }
            .btn {
                font-size: 14px;
                padding: 10px 20px;
            }
        }