/* 复用首页的核心变量与基础样式 */
        :root {
            --primary-color: #2563eb;
            --primary-light: #60a5fa;
            --accent-color: #06b6d4;
            --gradient-text: linear-gradient(135deg, #2563eb 0%, #06b6d4 100%);
            --hero-bg-light: #f8fafc;
            --hero-bg-dark: #0f172a;
            --glass-bg-light: rgba(255, 255, 255, 0.7);
            --glass-bg-dark: rgba(15, 23, 42, 0.6);
            --glass-border-light: rgba(255, 255, 255, 0.5);
            --glass-border-dark: rgba(255, 255, 255, 0.1);
        }

        html { scroll-padding-top: 80px; }
        body { font-family: 'Inter', 'Noto Sans SC', sans-serif; overflow-x: hidden; }

        /* --- 动画 --- */
        .reveal { opacity: 0; transform: translateY(30px); transition: all 0.8s cubic-bezier(0.5, 0, 0, 1); }
        .reveal.active { opacity: 1; transform: translateY(0); }

        /* --- 导航栏 --- */
        .navbar {
            backdrop-filter: blur(12px);
            background-color: rgba(255,255,255,0.85) !important;
            border-bottom: 1px solid rgba(0,0,0,0.05);
            padding: 1rem 0;
            transition: all 0.3s ease;
            box-shadow: 0 4px 24px rgba(0,0,0,0.06);
        }
        [data-bs-theme="dark"] .navbar {
            background-color: rgba(15, 23, 42, 0.85) !important;
            border-bottom: 1px solid rgba(255,255,255,0.05);
            box-shadow: 0 4px 24px rgba(0,0,0,0.4);
        }
        .nav-link { font-weight: 500; margin: 0 5px; position: relative; color: var(--bs-body-color); }
        .nav-link::after { content: ''; position: absolute; width: 0; height: 2px; bottom: 0; left: 50%; background: var(--primary-color); transition: all 0.3s; transform: translateX(-50%); }
        .nav-link:hover::after, .nav-link.active::after { width: 80%; }
        .nav-link.active { color: var(--primary-color) !important; }

        /* --- Hero Section (Services) --- */
        .page-header {
            background-color: var(--hero-bg-light);
            background-image: 
                radial-gradient(at 0% 0%, rgba(37, 99, 235, 0.1) 0px, transparent 50%),
                radial-gradient(at 100% 100%, rgba(6, 182, 212, 0.1) 0px, transparent 50%),
                radial-gradient(#cbd5e1 1px, transparent 1px);
            background-size: 100% 100%, 100% 100%, 40px 40px;
            padding: 160px 0 100px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        [data-bs-theme="dark"] .page-header {
            background-color: var(--hero-bg-dark);
            background-image: 
                radial-gradient(at 0% 0%, rgba(37, 99, 235, 0.2) 0px, transparent 50%),
                radial-gradient(at 100% 100%, rgba(6, 182, 212, 0.2) 0px, transparent 50%),
                radial-gradient(#334155 1px, transparent 1px);
        }
        .text-gradient {
            background: var(--gradient-text);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        
        /* 模拟 Dashboard UI (CSS Only - Enhanced) */
        .hero-dashboard-mockup {
            background: var(--glass-bg-light);
            border: 1px solid var(--glass-border-light);
            border-radius: 20px;
            box-shadow: 0 40px 80px rgba(0,0,0,0.15);
            max-width: 900px;
            margin: 60px auto 0;
            padding: 20px;
            position: relative;
            transform: perspective(1000px) rotateX(5deg);
            transition: transform 0.5s ease;
            backdrop-filter: blur(20px);
        }
        .hero-dashboard-mockup:hover {
            transform: perspective(1000px) rotateX(0deg) scale(1.02);
        }
        [data-bs-theme="dark"] .hero-dashboard-mockup {
            background: var(--glass-bg-dark);
            border-color: var(--glass-border-dark);
            box-shadow: 0 40px 80px rgba(0,0,0,0.4);
        }
        
        /* 动态通知气泡 */
        .dashboard-notification {
            position: absolute;
            top: 20px; right: -20px;
            background: white;
            padding: 10px 15px;
            border-radius: 10px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.15);
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.8rem;
            font-weight: bold;
            animation: floatNotification 4s ease-in-out infinite;
            z-index: 10;
        }
        [data-bs-theme="dark"] .dashboard-notification {
            background: #334155;
            color: white;
        }
        @keyframes floatNotification {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-10px); }
        }

        /* Dashboard 内部元素动画 */
        .dashboard-bar {
            width: 100%;
            height: 8px;
            border-radius: 4px;
            background: #e2e8f0;
            overflow: hidden;
            position: relative;
        }
        [data-bs-theme="dark"] .dashboard-bar { background: #334155; }
        .dashboard-bar::after {
            content: '';
            position: absolute;
            left: 0; top: 0; height: 100%;
            background: var(--primary-color);
            width: 0%;
            animation: fillBar 1.5s ease-out forwards;
        }
        @keyframes fillBar { to { width: var(--w); } }

        /* --- Payment Strip --- */
        .payment-strip {
            overflow: hidden;
            white-space: nowrap;
            padding: 20px 0;
            background: var(--hero-bg-light);
            border-top: 1px solid rgba(0,0,0,0.05);
            border-bottom: 1px solid rgba(0,0,0,0.05);
        }
        [data-bs-theme="dark"] .payment-strip {
            background: var(--hero-bg-dark);
            border-color: rgba(255,255,255,0.05);
        }
        .payment-track {
            display: inline-block;
            animation: scroll 30s linear infinite;
        }
        .payment-logo {
            display: inline-flex;
            align-items: center;
            margin: 0 30px;
            opacity: 0.6;
            font-weight: bold;
            font-size: 1.2rem;
            color: var(--bs-body-color);
            filter: grayscale(100%);
            transition: 0.3s;
        }
        .payment-logo:hover { filter: grayscale(0%); opacity: 1; color: var(--primary-color); }
        @keyframes scroll { 0% { transform: translateX(0); } 100% { transform: translateX(-50%); } }

        /* --- Service Cards --- */
        .service-card-blue { --card-tint: rgba(13, 110, 253, 0.08); --card-border: rgba(13, 110, 253, 0.3); --card-shadow: rgba(13, 110, 253, 0.15); }
        .service-card-cyan { --card-tint: rgba(13, 202, 240, 0.08); --card-border: rgba(13, 202, 240, 0.3); --card-shadow: rgba(13, 202, 240, 0.15); }
        .service-card-purple { --card-tint: rgba(111, 66, 193, 0.08); --card-border: rgba(111, 66, 193, 0.3); --card-shadow: rgba(111, 66, 193, 0.15); }
        .service-card-yellow { --card-tint: rgba(255, 193, 7, 0.08); --card-border: rgba(255, 193, 7, 0.3); --card-shadow: rgba(255, 193, 7, 0.15); }
        .service-card-green { --card-tint: rgba(25, 135, 84, 0.08); --card-border: rgba(25, 135, 84, 0.3); --card-shadow: rgba(25, 135, 84, 0.15); }
        .service-card-orange { --card-tint: rgba(253, 126, 20, 0.08); --card-border: rgba(253, 126, 20, 0.3); --card-shadow: rgba(253, 126, 20, 0.15); }

        .service-card {
            background: linear-gradient(145deg, var(--glass-bg-light) 0%, var(--card-tint, transparent) 100%);
            border: 1px solid var(--card-border, var(--glass-border-light));
            border-radius: 20px;
            padding: 40px 30px;
            transition: all 0.4s ease;
            height: 100%;
            position: relative;
            overflow: hidden;
            z-index: 1;
        }
        [data-bs-theme="dark"] .service-card {
            background: linear-gradient(145deg, var(--glass-bg-dark) 0%, var(--card-tint, transparent) 100%);
            border: 1px solid var(--card-border, var(--glass-border-dark));
        }
        .service-card::before {
            content: '';
            position: absolute;
            top: 0; right: 0; width: 120px; height: 120px;
            background: radial-gradient(circle at top right, var(--card-tint, transparent), transparent 70%);
            border-radius: 0 20px 0 100%;
            transition: all 0.4s;
            z-index: -1;
        }
        .service-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 20px 40px var(--card-shadow, rgba(0,0,0,0.08));
            border-color: var(--card-border);
        }
        .service-icon {
            width: 70px; height: 70px;
            border-radius: 16px;
            display: flex; align-items: center; justify-content: center;
            font-size: 2rem;
            margin-bottom: 25px;
            transition: all 0.3s;
            background-color: var(--card-tint);
            color: inherit;
        }
        .service-card-blue .service-icon { color: #0d6efd; }
        .service-card-cyan .service-icon { color: #0dcaf0; }
        .service-card-purple .service-icon { color: #6f42c1; }
        .service-card-yellow .service-icon { color: #ffc107; }
        .service-card-green .service-icon { color: #198754; }
        .service-card-orange .service-icon { color: #fd7e14; }

        .service-card:hover .service-icon { transform: scale(1.1) rotate(-5deg); }

        /* --- Business Mode Cards --- */
        .mode-card {
            background: white;
            border: 1px solid rgba(0,0,0,0.05);
            border-radius: 16px;
            padding: 25px;
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            height: 100%;
            display: flex;
            align-items: flex-start;
            gap: 20px;
        }
        [data-bs-theme="dark"] .mode-card {
            background: #1e293b;
            border-color: rgba(255,255,255,0.05);
        }
        .mode-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.08);
            border-color: var(--primary-light);
        }
        .mode-icon-wrapper {
            width: 60px;
            height: 60px;
            flex-shrink: 0;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.8rem;
            transition: all 0.3s;
        }
        .mode-icon-primary { background: rgba(13, 110, 253, 0.1); color: #0d6efd; }
        .mode-icon-warning { background: rgba(255, 193, 7, 0.1); color: #ffc107; }
        .mode-icon-success { background: rgba(25, 135, 84, 0.1); color: #198754; }
        .mode-icon-info { background: rgba(13, 202, 240, 0.1); color: #0dcaf0; }
        
        .mode-card:hover .mode-icon-wrapper {
            transform: scale(1.1) rotate(5deg);
        }

        /* --- Workflow Diagram Section --- */
        .workflow-step {
            position: relative;
            text-align: center;
            padding: 20px;
        }
        .workflow-icon {
            width: 80px; height: 80px;
            background: white;
            border-radius: 50%;
            display: flex; align-items: center; justify-content: center;
            margin: 0 auto 20px;
            font-size: 2rem;
            color: var(--primary-color);
            box-shadow: 0 10px 30px rgba(0,0,0,0.1);
            position: relative;
            z-index: 2;
            transition: all 0.3s;
        }
        .workflow-step:hover .workflow-icon {
            transform: scale(1.1);
            color: white;
            background: var(--primary-color);
        }
        [data-bs-theme="dark"] .workflow-icon {
            background: #1e293b;
            color: var(--primary-light);
            box-shadow: 0 10px 30px rgba(0,0,0,0.3);
        }
        .workflow-arrow {
            position: absolute;
            top: 60px;
            left: 50%;
            width: 100%;
            height: 2px;
            background: repeating-linear-gradient(to right, #cbd5e1 0, #cbd5e1 5px, transparent 5px, transparent 10px);
            z-index: 1;
        }
        [data-bs-theme="dark"] .workflow-arrow {
            background: repeating-linear-gradient(to right, #475569 0, #475569 5px, transparent 5px, transparent 10px);
        }

        /* --- Hardware Section --- */
        .hardware-card {
            background: var(--glass-bg-light);
            border: 1px solid rgba(0,0,0,0.05);
            border-radius: 16px;
            padding: 30px 20px;
            text-align: center;
            transition: all 0.3s;
            height: 100%;
            position: relative;
            overflow: hidden;
        }
        [data-bs-theme="dark"] .hardware-card { 
            background: var(--glass-bg-dark);
            border-color: rgba(255,255,255,0.05); 
        }
        .hardware-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 20px 40px rgba(0,0,0,0.1);
            border-color: var(--primary-color);
        }
        .hardware-icon-box {
            height: 80px;
            width: 80px;
            margin: 0 auto 20px;
            background: rgba(37, 99, 235, 0.05);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all 0.3s;
        }
        .hardware-card:hover .hardware-icon-box {
            background: var(--primary-color);
            color: white !important;
        }
        .hardware-card:hover .hardware-icon-box i { color: white !important; }

        /* --- Comparison Section --- */
        .table-responsive {
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 4px 20px rgba(0,0,0,0.05);
        }
        .comparison-table {
            border-collapse: separate;
            border-spacing: 0;
            width: 100%;
            min-width: 600px; /* 强制最小宽度，确保在手机上可滑动 */
        }
        .comparison-table th, .comparison-table td {
            padding: 20px;
            text-align: center;
            border-bottom: 1px solid rgba(0,0,0,0.05);
            background: var(--glass-bg-light);
        }
        [data-bs-theme="dark"] .comparison-table th, 
        [data-bs-theme="dark"] .comparison-table td {
            border-color: rgba(255,255,255,0.05);
            background: var(--glass-bg-dark);
        }
        .comparison-table th {
            background: var(--primary-color);
            color: white;
            font-weight: 600;
        }
        .comparison-table th:first-child { background: #1e293b; }
        .check-icon { color: #198754; font-size: 1.2rem; }
        .cross-icon { color: #dc3545; font-size: 1.2rem; opacity: 0.5; }

        /* --- FAQ Accordion --- */
        .faq-section {
            position: relative;
            background-color: var(--hero-bg-light);
            background-image: radial-gradient(at 50% 50%, rgba(37, 99, 235, 0.05) 0px, transparent 50%);
        }
        [data-bs-theme="dark"] .faq-section {
            background-color: var(--hero-bg-dark);
            background-image: radial-gradient(at 50% 50%, rgba(37, 99, 235, 0.1) 0px, transparent 50%);
        }

        .accordion-item {
            background: var(--glass-bg-light);
            border: 1px solid var(--glass-border-light);
            border-radius: 16px !important;
            margin-bottom: 16px;
            box-shadow: 0 4px 6px rgba(0,0,0,0.01);
            overflow: hidden;
            transition: all 0.3s ease;
        }
        [data-bs-theme="dark"] .accordion-item {
            background: var(--glass-bg-dark);
            border: 1px solid var(--glass-border-dark);
        }
        .accordion-item:hover {
            box-shadow: 0 10px 15px rgba(0,0,0,0.05);
            transform: translateY(-2px);
        }
        
        .accordion-button {
            background-color: transparent !important;
            font-weight: 600;
            padding: 1.5rem;
            color: var(--bs-body-color);
            box-shadow: none !important;
        }
        .accordion-button:not(.collapsed) {
            color: var(--primary-color);
            background-color: rgba(37, 99, 235, 0.03) !important;
        }
        .accordion-button::after {
            background-size: 1rem;
            opacity: 0.5;
            transition: all 0.3s;
        }
        .accordion-button:not(.collapsed)::after {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%232563eb'%3e%3cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3e%3c/svg%3e");
            opacity: 1;
        }
        .accordion-body {
            padding: 0 1.5rem 1.5rem 1.5rem;
            line-height: 1.6;
            color: var(--bs-secondary-color);
        }

        /* --- Footer CTA --- */
        .cta-box {
            background: linear-gradient(135deg, #2563eb 0%, #1e40af 100%);
            border-radius: 30px;
            padding: 80px 40px;
            position: relative;
            overflow: hidden;
            color: white;
        }
        .cta-pattern {
            position: absolute;
            top: 0; left: 0; width: 100%; height: 100%;
            background-image: radial-gradient(rgba(255,255,255,0.1) 1px, transparent 1px);
            background-size: 30px 30px;
            opacity: 0.5;
        }

        /* Footer */
        .footer-premium { background-color: #020617; color: #94a3b8; padding: 80px 0 30px; }
        .footer-link { color: #94a3b8; text-decoration: none; transition: 0.2s; display: block; margin-bottom: 10px; }
        .footer-link:hover { color: white; }

        /* Floating Button */
        .scroll-top-btn {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background: var(--primary-color);
            color: white;
            border: none;
            border-radius: 50%;
            box-shadow: 0 4px 10px rgba(0,0,0,0.2);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s;
            z-index: 999;
        }
        .scroll-top-btn.visible { opacity: 1; visibility: visible; }
        .scroll-top-btn:hover { background: #1d4ed8; transform: translateY(-3px); }

        /* =================================================================
            深度移动端适配 (Mobile Optimizations)
           ================================================================= */
        @media (max-width: 991px) {
            /* 1. Hero 区域紧凑化 */
            .page-header {
                padding: 120px 0 60px;
            }
            .display-4 { font-size: 2rem; }
            .hero-dashboard-mockup {
                margin-top: 40px;
                transform: none !important; /* 手机端禁用 3D 倾斜，避免溢出 */
            }
            
            /* 2. 支付条滚动优化 */
            .payment-logo { margin: 0 15px; font-size: 1rem; }
            
            /* 3. Workflow 流程图垂直化 */
            .workflow-arrow {
                width: 2px;
                height: 40px;
                top: 100%; /* 放在图标下方 */
                left: 50%;
                transform: translateX(-50%);
                background: repeating-linear-gradient(to bottom, #cbd5e1 0, #cbd5e1 5px, transparent 5px, transparent 10px);
                z-index: 0;
            }
            [data-bs-theme="dark"] .workflow-arrow {
                background: repeating-linear-gradient(to bottom, #475569 0, #475569 5px, transparent 5px, transparent 10px);
            }
            /* 最后一个步骤隐藏箭头 */
            .col:last-child .workflow-arrow { display: none; }
            
            /* 4. 通用间距调整 */
            .py-5 { padding-top: 3rem !important; padding-bottom: 3rem !important; }
            
            /* 5. 隐藏气泡 */
            .dashboard-notification { display: none; }
        }