* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        /* 模擬頁面背景 */
        .demo-content {
            min-height: 100vh;
            background: linear-gradient(135deg, #f5f7fc 0%, #eef2f8 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            font-family: system-ui, 'Segoe UI', 'Noto Sans TC', 'Apple Color Emoji', sans-serif;
            padding: 2rem;
        }
        .card {
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(4px);
            border-radius: 2rem;
            padding: 2rem 2.5rem;
            box-shadow: 0 20px 35px -10px rgba(0,0,0,0.1);
            text-align: center;
            max-width: 500px;
            border: 1px solid rgba(255,255,255,0.6);
        }
        .card h2 {
            font-size: 1.8rem;
            margin-bottom: 0.5rem;
            color: #1e2f3f;
        }
        .card p {
            color: #2c4c6e;
            margin-bottom: 1rem;
        }
        .card small {
            color: #6c86a3;
            font-size: 0.85rem;
        }

        /* ----- 右側浮動官方按鈕群組 ----- */
        .floating-contact {
            position: fixed;
            right: 20px;
            bottom: 24px;
            z-index: 9999;
            display: flex;
            flex-direction: column;
            gap: 14px;
            align-items: flex-end;
        }

        .contact-item {
            display: flex;
            align-items: center;
            justify-content: flex-end;
            cursor: pointer;
            transition: all 0.25s cubic-bezier(0.2, 0.9, 0.4, 1.1);
            border-radius: 60px;
            background: transparent;
        }

        /* 官方按鈕本體 - 圓形品牌色 */
        .contact-btn {
            width: 54px;
            height: 54px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 6px 14px rgba(0, 0, 0, 0.2);
            transition: all 0.2s ease;
            background: white;
            border: none;
        }
        .contact-btn img {
            width: 32px;
            height: 32px;
            object-fit: contain;
            display: block;
        }

        /* 官方品牌配色 */
        .contact-item.wechat .contact-btn {
            background: #09B83E;
            box-shadow: 0 6px 14px rgba(9, 184, 62, 0.35);
        }
        .contact-item.whatsapp .contact-btn {
            background: #25D366;
            box-shadow: 0 6px 14px rgba(37, 211, 102, 0.35);
        }
        .contact-item.line .contact-btn {
            background: #06C755;
            box-shadow: 0 6px 14px rgba(6, 199, 85, 0.35);
        }

        .contact-btn img {
            filter: brightness(0) invert(1);
        }

        /* 懸浮標籤 */
        .contact-label {
            background: rgba(20, 30, 45, 0.92);
            backdrop-filter: blur(8px);
            color: white;
            padding: 6px 18px;
            border-radius: 40px;
            font-size: 0.85rem;
            font-weight: 500;
            font-family: system-ui, 'Segoe UI', 'Noto Sans TC', sans-serif;
            white-space: nowrap;
            letter-spacing: 0.3px;
            margin-right: 12px;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
            border: 0.5px solid rgba(255,255,255,0.2);
            pointer-events: none;
            opacity: 0;
            transform: translateX(15px);
            transition: opacity 0.2s, transform 0.2s;
        }

        /* 電腦 hover 效果 */
        @media (min-width: 769px) {
            .contact-item:hover .contact-label {
                opacity: 1;
                transform: translateX(0);
            }
            .contact-item:hover .contact-btn {
                transform: scale(1.05);
                box-shadow: 0 10px 22px rgba(0,0,0,0.25);
            }
        }

        /* 手機 (≤768px) */
        @media (max-width: 768px) {
            .floating-contact {
                right: 12px;
                bottom: 20px;
                gap: 12px;
            }
            .contact-btn {
                width: 48px;
                height: 48px;
            }
            .contact-btn img {
                width: 28px;
                height: 28px;
            }
            .contact-label {
                font-size: 0.75rem;
                padding: 5px 14px;
                margin-right: 10px;
            }
            .contact-item.show-label .contact-label {
                opacity: 1;
                transform: translateX(0);
            }
        }

        /* 入場動畫 */
        .contact-item {
            animation: slideFadeIn 0.3s ease backwards;
        }
        .contact-item:nth-child(1) { animation-delay: 0.05s; }
        .contact-item:nth-child(2) { animation-delay: 0.1s; }
        .contact-item:nth-child(3) { animation-delay: 0.15s; }
        @keyframes slideFadeIn {
            from {
                opacity: 0;
                transform: translateX(35px);
            }
            to {
                opacity: 1;
                transform: translateX(0);
            }
        }

        /* Toast 提示 (複製反饋) */
        .toast-msg {
            position: fixed;
            bottom: 100px;
            left: 50%;
            transform: translateX(-50%) scale(0.9);
            background: rgba(0,0,0,0.85);
            backdrop-filter: blur(12px);
            color: white;
            padding: 10px 22px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-family: system-ui;
            z-index: 10001;
            opacity: 0;
            transition: opacity 0.2s, transform 0.2s;
            pointer-events: none;
            white-space: nowrap;
            font-weight: 500;
        }
        .toast-msg.show {
            opacity: 1;
            transform: translateX(-50%) scale(1);
        }

        /* ---------- 微信電腦版彈窗 (模態框) ---------- */
        .wechat-modal {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.6);
            backdrop-filter: blur(5px);
            z-index: 20000;
            align-items: center;
            justify-content: center;
            font-family: system-ui, 'Segoe UI', 'Noto Sans TC', sans-serif;
        }
        .wechat-modal-content {
            background: #ffffff;
            max-width: 340px;
            width: 85%;
            border-radius: 32px;
            text-align: center;
            padding: 28px 20px 30px;
            box-shadow: 0 25px 45px rgba(0, 0, 0, 0.3);
            position: relative;
            animation: modalPop 0.2s ease;
        }
        @keyframes modalPop {
            from {
                opacity: 0;
                transform: scale(0.92);
            }
            to {
                opacity: 1;
                transform: scale(1);
            }
        }
        .wechat-modal-content h3 {
            font-size: 1.6rem;
            color: #1f2f3e;
            margin-bottom: 12px;
            font-weight: 600;
        }
        .qr-placeholder {
            background: #f0f2f5;
            width: 200px;
            height: 200px;
            margin: 16px auto;
            border-radius: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            border: 1px dashed #bdc4cc;
            position: relative;
            overflow: hidden;
        }
        .qr-placeholder img {
            max-width: 100%;
            max-height: 100%;
            object-fit: contain;
        }
        .qr-tip {
            font-size: 0.85rem;
            color: #2c3e4e;
            background: #eef2f8;
            display: inline-block;
            padding: 6px 14px;
            border-radius: 60px;
            margin: 12px 0 8px;
        }
        .wechat-id-text {
            font-weight: 600;
            color: #09B83E;
            background: #e9f7ef;
            padding: 8px 12px;
            border-radius: 40px;
            font-size: 0.9rem;
            margin: 12px 15px 8px;
            word-break: break-all;
        }
        .copy-id-btn {
            background: #09B83E;
            border: none;
            color: white;
            font-size: 0.9rem;
            font-weight: 500;
            padding: 8px 20px;
            border-radius: 40px;
            margin-top: 12px;
            cursor: pointer;
            transition: 0.2s;
            width: 80%;
        }
        .copy-id-btn:hover {
            background: #079e35;
        }
        .close-modal {
            position: absolute;
            top: 16px;
            right: 20px;
            font-size: 26px;
            cursor: pointer;
            color: #8c9aa8;
            transition: 0.2s;
            line-height: 1;
        }
        .close-modal:hover {
            color: #2c3e50;
        }
        .modal-footnote {
            font-size: 0.7rem;
            color: #7e8c9a;
            margin-top: 16px;
        }
        @media (max-width: 768px) {
            .wechat-modal-content {
                width: 80%;
                padding: 20px 16px;
            }
            .qr-placeholder {
                width: 170px;
                height: 170px;
            }
        }