/* =============================================
           CSS Custom Properties
        ============================================= */
        :root {
            --bg-deep:       #080b10;
            --bg-surface:    #0d1117;
            --bg-card:       rgba(255,255,255,0.04);
            --bg-card-hover: rgba(255,255,255,0.07);
            --border:        rgba(255,255,255,0.08);
            --border-bright: rgba(255,255,255,0.18);
            --accent-cyan:   #00d4ff;
            --accent-blue:   #4f8fff;
            --accent-purple: #a855f7;
            --text-primary:  rgba(255,255,255,0.95);
            --text-secondary:rgba(255,255,255,0.55);
            --text-tertiary: rgba(255,255,255,0.30);
            --font-main:     'Space Grotesk', 'Inter', sans-serif;
            --font-body:     'Inter', sans-serif;
            --radius-sm:     8px;
            --radius-md:     16px;
            --radius-lg:     24px;
            --transition:    0.4s cubic-bezier(0.23, 1, 0.32, 1);
            --bg-color:rgba(52, 50, 50, 1);
			--card-bg: rgba(255, 255, 255, 0.05);
			--glass-bg: rgba(255, 255, 255, 0.1);
			--accent-color: #ffffff;
			--text-color: #e0e0e0;
			--text-muted: #ffffff;
			--spacing: 20px;
        }

        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; }
        body {
            background-color: var(--bg-deep);
            color: var(--text-primary);
            font-family: var(--font-body);
            overflow-x: hidden;
            line-height: 1.6;
        }

        /* =============================================
           Particle Canvas
        ============================================= */
        #ambient-canvas {
            position: fixed; top: 0; left: 0;
            width: 100%; height: 100%;
            z-index: 0; pointer-events: none;
        }

        .grid-overlay {
            position: fixed; top: 0; left: 0;
            width: 100%; height: 100%;
            z-index: 0; pointer-events: none;
            background-image:
                linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
            background-size: 60px 60px;
            mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 30%, transparent 80%);
        }

        /* =============================================
           Navigation
        ============================================= */
        #navbar {
            position: fixed; top: 0; left: 0;
            width: 100%; z-index: 1000;
            display: flex; align-items: center; justify-content: space-between;
            padding: 0 5%; height: 68px;
            transition: background var(--transition), backdrop-filter var(--transition);
        }
        #navbar.scrolled {
            background: rgba(8,11,16,0.88);
            backdrop-filter: blur(24px);
            -webkit-backdrop-filter: blur(24px);
            border-bottom: 1px solid var(--border);
        }
        .nav-logo { display: flex; align-items: center; gap: 10px; cursor: pointer; text-decoration: none; }
        .nav-logo img { height: 22px; opacity: 0.95; }
        .nav-links { display: flex; align-items: center; gap: 4px; list-style: none; }
        .nav-links a {
            display: block; padding: 8px 16px;
            font-family: var(--font-body); font-size: 14px; font-weight: 400;
            color: var(--text-secondary); text-decoration: none;
            border-radius: 8px; transition: color var(--transition), background var(--transition);
        }
        .nav-links a:hover { color: var(--text-primary); background: rgba(255,255,255,0.07); }

        .nav-cta { display: flex; align-items: center; gap: 12px; }

        /* Language dropdown */
        .lang-drop { position: relative; }
        .lang-drop-btn {
            display: flex; align-items: center; gap: 6px;
            padding: 7px 12px;
            background: rgba(255,255,255,0.06); border: 1px solid var(--border);
            border-radius: 8px; color: var(--text-secondary); font-size: 13px;
            cursor: pointer; transition: all var(--transition); font-family: var(--font-body);
        }
        .lang-drop-btn:hover { background: rgba(255,255,255,0.1); color: var(--text-primary); }
        .lang-drop-content {
            display: none; position: absolute; top: calc(100% + 2px); right: 0;
            background: rgba(12,15,22,0.97); backdrop-filter: blur(20px);
            border: 1px solid var(--border); border-radius: 12px; overflow: hidden;
            min-width: 100px; box-shadow: 0 20px 60px rgba(0,0,0,0.5);
        }
        .lang-drop:hover .lang-drop-content { display: block; }
        .lang-drop-content a {
            display: block; padding: 10px 16px; font-size: 13px;
            color: var(--text-secondary); text-decoration: none;
            transition: all 0.2s; text-align: center;
        }
        .lang-drop-content a:hover { background: rgba(255,255,255,0.07); color: var(--text-primary); }

        .btn-nav-demo {
            display: inline-flex; align-items: center; gap: 8px; padding: 8px 20px;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            border-radius: 10px; font-size: 14px; font-weight: 500; color: #fff;
            cursor: pointer; transition: all var(--transition); border: none;
            font-family: var(--font-body); letter-spacing: 0.3px;
        }
        .btn-nav-demo:hover { opacity: 0.88; transform: translateY(-1px); box-shadow: 0 8px 24px rgba(0,212,255,0.3); }

        /* =============================================
           Hero
        ============================================= */
        #hero {
            position: relative; min-height: 100vh;
            display: flex; flex-direction: column;
            align-items: center; justify-content: center;
            text-align: center; padding: 120px 5% 80px;
            z-index: 1; overflow: hidden;
        }
        #hero-carousel {
            position: absolute; 
            top: 0; 
            left: 0;
            width: 100%; 
            height: 100%;
            z-index: 0; 
            pointer-events: none; 
            /*opacity: 0.55;*/
            border: none;
            z-index: 3;
        }

        .hero-badge {
            position: relative; z-index: 1;
            display: inline-flex; align-items: center; gap: 8px;
            padding: 6px 16px; border: 1px solid rgba(0,212,255,0.3);
            border-radius: 100px; font-size: 11px; font-weight: 600;
            color: var(--accent-cyan); background: rgba(0,212,255,0.06);
            letter-spacing: 1.5px; text-transform: uppercase; margin-bottom: 28px;
            animation: fadeSlideDown 0.9s ease both; animation-delay: 0.1s;
        }
        .hero-badge .pulse-dot {
            width: 6px; height: 6px; border-radius: 50%;
            background: var(--accent-cyan); animation: pulse-dot 2s infinite;
        }
        @keyframes pulse-dot {
            0%,100% { opacity:1; transform:scale(1); }
            50%      { opacity:0.4; transform:scale(0.7); }
        }

        .hero-title {
            position: relative; z-index: 1;
            font-family: var(--font-main);
            font-size: clamp(2.4rem, 6.5vw, 6rem);
            font-weight: 700; line-height: 1.1; letter-spacing: -1.5px;
            color: var(--text-primary); margin-bottom: 24px;
            animation: fadeSlideDown 0.9s ease both; animation-delay: 0.25s;
        }
        .hero-title .highlight {
            background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-blue) 50%, var(--accent-purple) 100%);
            -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
        }
        .hero-subtitle {
            position: relative; z-index: 4;
            font-size: clamp(0.95rem, 1.8vw, 1.2rem); font-weight: 300;
            color: var(--text-secondary); max-width: 600px; margin: 0 auto 48px; line-height: 1.9;
            animation: fadeSlideDown 0.9s ease both; animation-delay: 0.4s;
        }
        .hero-actions {
            position: relative; z-index: 1;
            display: flex; align-items: center; justify-content: center;
            gap: 16px; flex-wrap: wrap;
            animation: fadeSlideDown 0.9s ease both; animation-delay: 0.55s;
        }
        .btn-primary {
            display: inline-flex; align-items: center; gap: 10px; padding: 14px 32px;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            border-radius: var(--radius-md); font-size: 15px; font-weight: 600; color: #fff;
            cursor: pointer; border: none; font-family: var(--font-body); transition: all var(--transition);
        }
        .btn-primary:hover { transform: translateY(-3px); box-shadow: 0 16px 48px rgba(0,212,255,0.35); }
        .btn-secondary {
            display: inline-flex; align-items: center; gap: 10px; padding: 13px 32px;
            background: transparent; border: 1px solid var(--border-bright); border-radius: var(--radius-md);
            font-size: 15px; font-weight: 400; color: var(--text-primary);
            cursor: pointer; font-family: var(--font-body); transition: all var(--transition);
        }
        .btn-secondary:hover { background: rgba(255,255,255,0.07); border-color: var(--accent-cyan); transform: translateY(-3px); }

        .hero-stats {
            position: relative; z-index: 4;
            display: flex; align-items: center; justify-content: center;
            gap: 48px; margin-top: 72px;
            animation: fadeSlideDown 0.9s ease both; animation-delay: 0.7s;
        }
        .stat-item { text-align: center; }
        .stat-num {
            font-family: var(--font-main); font-size: 2rem; font-weight: 700;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
        }
        .stat-label { font-size: 11px; color: var(--text-tertiary); letter-spacing: 1px; text-transform: uppercase; margin-top: 4px; }
        .stat-divider { width: 1px; height: 36px; background: var(--border); }

        .scroll-indicator {
            position: absolute; bottom: 36px; left: 50%; transform: translateX(-50%);
            display: flex; flex-direction: column; align-items: center; gap: 8px;
            color: var(--text-tertiary); font-size: 10px; letter-spacing: 2px; text-transform: uppercase;
            animation: fadeSlideDown 0.9s ease both, float 3s ease-in-out infinite;
            animation-delay: 1s, 1s; cursor: pointer; z-index: 1;
        }
        .scroll-line { width: 1px; height: 36px; background: linear-gradient(to bottom, transparent, var(--accent-cyan)); }

        /* =============================================
           Sections Common
        ============================================= */
        section { position: relative; z-index: 1; padding: 100px 5%; }

        .section-label {
            display: inline-flex; align-items: center; gap: 8px;
            font-size: 11px; font-weight: 600; color: var(--accent-cyan);
            letter-spacing: 2.5px; text-transform: uppercase; margin-bottom: 20px;
        }
        .section-label::before { content: ''; width: 20px; height: 1px; background: var(--accent-cyan); }
        .section-title {
            font-family: var(--font-main); font-size: clamp(1.8rem, 3.5vw, 3rem);
            font-weight: 700; letter-spacing: -0.5px; line-height: 1.15; margin-bottom: 16px;
        }
        .section-desc { font-size: 1rem; font-weight: 300; color: var(--text-secondary); max-width: 560px; line-height: 1.8; }

        /* =============================================
           Services
        ============================================= */
        #services { background: linear-gradient(180deg, var(--bg-deep) 0%, var(--bg-surface) 100%); }

        .services-header { text-align: center; margin-bottom: 64px; }
        .services-header .section-label { justify-content: center; }
        .services-header .section-label::before { display: none; }
        .services-header .section-desc { margin: 0 auto; }

        .services-grid {
            display: grid; grid-template-columns: repeat(auto-fit, minmax(300px,1fr));
            gap: 24px; max-width: 1200px; margin: 0 auto;
        }
        .service-card {
            position: relative; background: var(--bg-card);
            border: 1px solid var(--border); border-radius: var(--radius-lg);
            padding: 36px 32px; cursor: pointer; overflow: hidden;
            transition: all var(--transition);
        }
        .service-card::before {
            content: ''; position: absolute; top: 0; left: 0;
            width: 100%; height: 2px;
            background: linear-gradient(90deg, var(--accent-cyan), var(--accent-blue));
            opacity: 0; transition: opacity var(--transition);
        }
        .service-card:hover { background: var(--bg-card-hover); border-color: rgba(0,212,255,0.25); transform: translateY(-6px); box-shadow: 0 24px 64px rgba(0,0,0,0.4); }
        .service-card:hover::before { opacity: 1; }

        .service-video-wrap {
            position: relative; width: 100%; border-radius: var(--radius-md);
            overflow: hidden; margin-bottom: 24px; aspect-ratio: 16/9;
            background: rgba(0,0,0,0.3);
        }
        .service-video-wrap video { width: 100%; height: 100%; object-fit: cover; }
        .service-video-badge {
            position: absolute; top: 12px; right: 12px;
            display: flex; align-items: center; gap: 6px; padding: 4px 10px;
            background: rgba(0,0,0,0.7); backdrop-filter: blur(8px);
            border-radius: 100px; font-size: 11px; font-weight: 500;
            color: var(--accent-cyan); border: 1px solid rgba(0,212,255,0.2);
        }
        .svc-icon {
            display: inline-flex; align-items: center; justify-content: center;
            width: 44px; height: 44px; border-radius: 12px;
            background: linear-gradient(135deg, rgba(0,212,255,0.12), rgba(79,143,255,0.12));
            border: 1px solid rgba(0,212,255,0.15); margin-bottom: 16px;
            font-size: 18px; color: var(--accent-cyan);
        }
        .service-card h2 {
            all: unset; display: block; font-family: var(--font-main);
            font-size: 1.2rem; font-weight: 600; color: var(--text-primary); margin-bottom: 12px;
        }
        .service-card p {
            all: unset; display: block; font-size: 0.88rem;
            font-weight: 300; color: var(--text-secondary); line-height: 1.8;
        }
        .svc-link {
            display: inline-flex; align-items: center; gap: 6px; margin-top: 20px;
            font-size: 13px; font-weight: 500; color: var(--accent-cyan);
            cursor: pointer; transition: gap var(--transition);
        }
        .svc-link:hover { gap: 10px; }
        .tech-pill {
            display: inline-block; padding: 5px 12px; margin: 4px 4px 0 0;
            background: rgba(0,212,255,0.06); border: 1px solid rgba(0,212,255,0.18);
            border-radius: 100px; font-size: 11px; font-weight: 500; color: var(--accent-cyan);
        }

        /* =============================================
           Prowess
        ============================================= */
        #prowess { background: var(--bg-surface); }
        .prowess-inner {
            max-width: 1200px; margin: 0 auto;
            display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center;
        }
        .prowess-tech-list { display: flex; flex-direction: column; gap: 16px; margin-top: 40px; }
        .tech-item {
            display: flex; align-items: flex-start; gap: 18px; padding: 20px 24px;
            background: var(--bg-card); border: 1px solid var(--border);
            border-radius: var(--radius-md); transition: all var(--transition);
        }
        .tech-item:hover { background: var(--bg-card-hover); border-color: rgba(0,212,255,0.2); transform: translateX(8px); }
        .tech-icon {
            display: flex; align-items: center; justify-content: center;
            width: 42px; height: 42px; flex-shrink: 0; border-radius: 10px;
            background: linear-gradient(135deg, rgba(0,212,255,0.1), rgba(79,143,255,0.1));
            border: 1px solid rgba(0,212,255,0.12); font-size: 16px; color: var(--accent-cyan);
        }
        .tech-info h3 {
            all: unset; display: block; font-family: var(--font-main);
            font-size: 1rem; font-weight: 600; color: var(--text-primary); margin-bottom: 6px;
        }
        .tech-info p {
            all: unset; display: block; font-size: 0.84rem;
            font-weight: 300; color: var(--text-secondary); line-height: 1.7;
        }
        /* Skill bars */
        .prowess-right { display: flex; flex-direction: column; gap: 28px; }
        .skill-meta { display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px; }
        .skill-name { font-size: 13px; font-weight: 500; color: var(--text-primary); }
        .skill-pct { font-size: 12px; font-weight: 400; color: var(--accent-cyan); }
        .skill-track { width: 100%; height: 3px; background: rgba(255,255,255,0.08); border-radius: 100px; overflow: hidden; }
        .skill-fill {
            height: 100%;
            background: linear-gradient(90deg, var(--accent-cyan), var(--accent-blue));
            border-radius: 100px; width: 0%;
            transition: width 1.4s cubic-bezier(0.23, 1, 0.32, 1);
        }
        .prowess-badges { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 20px; }
        .prowess-badges .tech-pill { margin: 0; }

        /* =============================================
           Integration
        ============================================= */
        #integration { background: var(--bg-deep);}
        .integration-inner { max-width: 1200px; margin: 0 auto; }
        .integration-header { margin-bottom: 60px; }

        .steps-row { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; margin-bottom: 60px; }
        .step-card {
            position: relative; padding: 36px 28px;
            background: var(--bg-card); border: 1px solid var(--border);
            border-radius: var(--radius-lg); transition: all var(--transition);
        }
        .step-card::after {
            content: ''; position: absolute; top: 50%; right: -13px;
            transform: translateY(-50%); width: 26px; height: 1px;
            background: linear-gradient(90deg, var(--accent-cyan), transparent);
        }
        .step-card:last-child::after { display: none; }
        .step-card:hover { border-color: rgba(0,212,255,0.25); background: var(--bg-card-hover); transform: translateY(-4px); }
        .step-num {
            font-family: var(--font-main); font-size: 3.2rem; font-weight: 700;
            background: linear-gradient(135deg, rgba(0,212,255,0.25), rgba(79,143,255,0.15));
            -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
            line-height: 1; margin-bottom: 20px;
        }
        .step-card h3 {
            all: unset; display: block; font-family: var(--font-main);
            font-size: 1.05rem; font-weight: 600; color: var(--text-primary); margin-bottom: 12px;
        }
        .step-card p {
            all: unset; display: block; font-size: 0.86rem;
            font-weight: 300; color: var(--text-secondary); line-height: 1.8;
        }
        .integration-demo { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; align-items: start; }
        .iframe-preview {
            width: 100%; 
			max-width: 100%;
			aspect-ratio: 16/9; 
			border: 1px solid var(--border);
            border-radius: var(--radius-lg); 
			overflow: hidden;
        }
        .iframe-preview iframe { width: 100%; height: 100%; border: none; }

        .code-panel { 
			background: rgba(6,8,14,0.95); 
			border: 1px solid var(--border); border-radius: var(--radius-lg); 
			overflow: hidden; 
			width: 100%;
    		min-width: 0; /* 關鍵：允許 Grid 子元素縮小到小於內容寬度 */
		}
        .code-panel-header {
            display: flex; align-items: center; justify-content: space-between;
            padding: 14px 20px; background: rgba(255,255,255,0.03); border-bottom: 1px solid var(--border);
        }
        .mac-dots { display: flex; gap: 7px; }
        .mac-dots span { width: 11px; height: 11px; border-radius: 50%; }
        .d-red { background: #ff5f56; }
        .d-yellow { background: #ffbd2e; }
        .d-green { background: #27c93f; }
        .code-lang-tag { font-size: 11px; font-weight: 500; color: var(--text-tertiary); letter-spacing: 1.5px; text-transform: uppercase; }
        .code-copy-btn {
            display: flex; align-items: center; gap: 6px; padding: 4px 10px;
            background: rgba(0,212,255,0.08); border: 1px solid rgba(0,212,255,0.2);
            border-radius: 6px; color: var(--accent-cyan); font-size: 12px;
            font-family: var(--font-body); cursor: pointer; transition: all 0.2s;
        }
        .code-copy-btn:hover { background: rgba(0,212,255,0.16); }
        .code-body { 
			padding: 24px;
			font-family: 'Courier New', monospace; font-size: 13px; 
			line-height: 1.9; 
			color: #c9d1d9; 
			overflow-x: auto; 
			white-space: pre-wrap; /* 額外保險：如果字串太長自動換行，或維持 pre 配合 overflow */
            word-break: break-all; /* 防止長網址撐破邊框 */
		}
        .code-comment { color: #6a9955; font-style: italic; }
        .code-tag { color: #7ee787; }
        .code-attr { color: #79c0ff; }
        .code-str { color: #ffa657; }
        .demo-invite {
            display: block; 
			margin-top: 16px; 
			padding: 14px 18px;
            background: linear-gradient(135deg, rgba(0,212,255,0.06), rgba(79,143,255,0.06));
            border: 1px solid rgba(0,212,255,0.15); border-radius: 10px;
            font-family: var(--font-body); 
			font-size: 13px; color: var(--accent-cyan); text-align: center;
			word-break: break-word; /* 避免英文在小螢幕被擠壓破版 */
        }

        /* =============================================
           Gallery
        ============================================= */
        #showcase { background: linear-gradient(180deg, var(--bg-surface) 0%, var(--bg-deep) 100%); }
        .showcase-header { text-align: center; max-width: 700px; margin: 0 auto 64px; }
        .showcase-header .section-label { justify-content: center; }
        .showcase-header .section-label::before { display: none; }
        .showcase-header .section-desc { margin: 0 auto; }

        .gallery-grid {
            display: grid; grid-template-columns: repeat(3, 1fr);
            gap: 20px; max-width: 1200px; margin: 0 auto;
        }
        .gallery-item {
            position: relative; border-radius: var(--radius-md);
            overflow: hidden; cursor: pointer; aspect-ratio: 4/3;
            background: rgba(0,0,0,0.4); border: 1px solid var(--border);
            transition: all var(--transition);
        }
        .gallery-item:nth-child(1) { grid-column: 1; grid-row: 1; }
        .gallery-item:nth-child(2) { grid-column: 2 / 4; grid-row: 1; aspect-ratio: 8/3; }
        .gallery-item:nth-child(3) { grid-column: 1 / 3; grid-row: 2; aspect-ratio: 8/3; }
        .gallery-item:nth-child(4) { grid-column: 3; grid-row: 2; }
        .gallery-item img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s cubic-bezier(0.23,1,0.32,1); }
        .gallery-item:hover { border-color: rgba(0,212,255,0.3); box-shadow: 0 20px 60px rgba(0,0,0,0.5); }
        .gallery-item:hover img { transform: scale(1.06); }
        .gallery-overlay {
            position: absolute; bottom: 0; left: 0; width: 100%; padding: 24px;
            background: linear-gradient(transparent, rgba(0,0,0,0.85));
            transform: translateY(30%); opacity: 0; transition: all var(--transition);
        }
        .gallery-item:hover .gallery-overlay { transform: translateY(0); opacity: 1; }
        .gallery-overlay-title { font-family: var(--font-main); font-size: 1rem; font-weight: 600; color: var(--text-primary); margin-bottom: 4px; }
        .gallery-overlay-tag { font-size: 12px; color: var(--accent-cyan); }

        /* =============================================
           CTA
        ============================================= */
        #cta { background: var(--bg-deep); padding: 100px 5%; }
        .cta-card {
            max-width: 900px; margin: 0 auto; text-align: center;
            padding: 72px 60px;
            background: linear-gradient(135deg, rgba(0,212,255,0.045), rgba(79,143,255,0.045));
            border: 1px solid rgba(0,212,255,0.12); border-radius: 32px;
            position: relative; overflow: hidden;
        }
        .cta-card::before {
            content: ''; position: absolute; top: -50%; left: -50%;
            width: 200%; height: 200%;
            background: radial-gradient(ellipse at center, rgba(0,212,255,0.04) 0%, transparent 70%);
            pointer-events: none;
        }
        .cta-card .section-label { justify-content: center; }
        .cta-card .section-label::before { display: none; }
        .cta-card .section-desc { margin: 0 auto 48px; max-width: 480px; }
        .cta-actions { display: flex; align-items: center; justify-content: center; gap: 16px; flex-wrap: wrap; }

        /* =============================================
           Footer
        ============================================= */
        #footer { background: var(--bg-surface); border-top: 1px solid var(--border); padding: 48px 5%; }
        .footer-inner {
            max-width: 1200px; margin: 0 auto;
            display: flex; align-items: center; justify-content: space-between;
            flex-wrap: wrap; gap: 24px;
        }
        .footer-brand img { height: 20px; opacity: 0.65; }
        .footer-info { display: flex; flex-direction: column; align-items: center; gap: 4px; text-align: center; }
        .footer-info span { font-size: 13px; color: var(--text-tertiary); }
        .footer-info a { color: var(--text-secondary); text-decoration: none; font-size: 13px; transition: color 0.2s; }
        .footer-info a:hover { color: var(--accent-cyan); }
        .footer-social { 
            display: flex; 
            align-items: center; 
            gap: 12px; 
            z-index: 9;
        }
        .footer-social a {
            display: flex; align-items: center; justify-content: center;
            width: 38px; height: 38px; border: 1px solid var(--border); border-radius: 10px;
            color: var(--text-secondary); text-decoration: none; font-size: 15px; transition: all var(--transition);
        }
        .footer-social a:hover { border-color: rgba(0,212,255,0.3); color: var(--accent-cyan); background: rgba(0,212,255,0.06); }

        /* =============================================
           Vignette + Animations
        ============================================= */
        .vignette {
            position: fixed; top: 0; left: 0; width: 100%; height: 100%;
            box-shadow: 0 0 280px rgba(0,0,0,0.95) inset; pointer-events: none; z-index: 0;
        }

        #web3d_threater
        {
            position: absolute;
            width: 100%;
            height: 100%;
        }
        
        @keyframes fadeSlideDown {
            from { opacity: 0; transform: translateY(-20px); }
            to   { opacity: 1; transform: translateY(0); }
        }
        @keyframes float {
            0%,100% { transform: translateX(-50%) translateY(0); }
            50%      { transform: translateX(-50%) translateY(-8px); }
        }

        /* Scroll reveal */
        .reveal { opacity: 0; transform: translateY(32px); transition: opacity 0.8s ease, transform 0.8s cubic-bezier(0.23, 1, 0.32, 1); }
        .reveal.visible { opacity: 1; transform: translateY(0); }
        .reveal-stagger > * { opacity: 0; transform: translateY(24px); transition: opacity 0.6s ease, transform 0.6s cubic-bezier(0.23,1,0.32,1); }
        .reveal-stagger.visible > *:nth-child(1) { opacity:1; transform:none; transition-delay:0.05s; }
        .reveal-stagger.visible > *:nth-child(2) { opacity:1; transform:none; transition-delay:0.15s; }
        .reveal-stagger.visible > *:nth-child(3) { opacity:1; transform:none; transition-delay:0.25s; }
        .reveal-stagger.visible > *:nth-child(4) { opacity:1; transform:none; transition-delay:0.35s; }

        /* =============================================
           Responsive
        ============================================= */
        @media (max-width: 1024px) {
            .prowess-inner { grid-template-columns: 1fr; gap: 48px; }
            .steps-row { grid-template-columns: 1fr; }
            .step-card::after { display: none; }
            .integration-demo { 
				grid-template-columns: 1fr; 
				width: 100%;
        		max-width: 100%;
        		overflow: hidden; /* 防止子元件陰影或邊框溢出 */
			}
            .gallery-grid { grid-template-columns: 1fr 1fr; }
            .gallery-item:nth-child(n) { grid-column: auto; grid-row: auto; aspect-ratio: 4/3; }
        }
        @media (max-width: 768px) {
            .nav-links { display: none; }
            .hero-stats { gap: 20px; flex-wrap: wrap; }
            .stat-divider { display: none; }
            .services-grid { grid-template-columns: 1fr; }
            .gallery-grid { grid-template-columns: 1fr; }
            .cta-card { padding: 48px 24px; }
            .footer-inner { flex-direction: column; align-items: center; text-align: center; }
        }
        @media (max-width: 480px) {
            .hero-actions { flex-direction: column; width: 100%; }
            .btn-primary, .btn-secondary { width: 100%; justify-content: center; }
        }